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Added pragma to allow non case sensitive symbols Added "nosymbolcase" and "symbolnocase" pragmas to cause symbols defined while the pragma is in effect to be treated as case insensitive. Also documented the new pragma.
author William Astle <lost@l-w.ca>
date Sat, 09 Jun 2012 15:47:22 -0600
parents 1e0a0e6cd918
children 5d969517db74
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1 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V4.5//EN">
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2 <book>
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3 <bookinfo>
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4 <title>LW Tool Chain</title>
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5 <author><firstname>William</firstname><surname>Astle</surname></author>
120
d90ab253471e Bumped copyright year on manual
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6 <copyright><year>2009-2011</year><holder>William Astle</holder></copyright>
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7 </bookinfo>
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8 <chapter>
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9
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10 <title>Introduction</title>
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11
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12 <para>
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13 The LW tool chain provides utilities for building binaries for MC6809 and
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14 HD6309 CPUs. The tool chain includes a cross-assembler and a cross-linker
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15 which support several styles of output.
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16 </para>
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17
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18 <section>
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19 <title>History</title>
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20 <para>
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21 For a long time, I have had an interest in creating an operating system for
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22 the Coco3. I finally started working on that project around the beginning of
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23 2006. I had a number of assemblers I could choose from. Eventually, I settled
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24 on one and started tinkering. After a while, I realized that assembler was not
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25 going to be sufficient due to lack of macros and issues with forward references.
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26 Then I tried another which handled forward references correctly but still did
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27 not support macros. I looked around at other assemblers and they all lacked
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28 one feature or another that I really wanted for creating my operating system.
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29 </para>
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30
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31 <para>
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32 The solution seemed clear at that point. I am a fair programmer so I figured
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33 I could write an assembler that would do everything I wanted an assembler to
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34 do. Thus the LWASM probject was born. After more than two years of on and off
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35 work, version 1.0 of LWASM was released in October of 2008.
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36 </para>
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37
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38 <para>
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39 As the aforementioned operating system project progressed further, it became
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40 clear that while assembling the whole project through a single file was doable,
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41 it was not practical. When I found myself playing some fancy games with macros
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42 in a bid to simulate sections, I realized I needed a means of assembling
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43 source files separately and linking them later. This spawned a major development
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44 effort to add an object file support to LWASM. It also spawned the LWLINK
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45 project to provide a means to actually link the files.
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46 </para>
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47
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48 </section>
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49
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50 </chapter>
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51
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52 <chapter>
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53 <title>Output Formats</title>
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54
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55 <para>
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56 The LW tool chain supports multiple output formats. Each format has its
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57 advantages and disadvantages. Each format is described below.
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58 </para>
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59
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60 <section>
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61 <title>Raw Binaries</title>
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62 <para>
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63 A raw binary is simply a string of bytes. There are no headers or other
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64 niceties. Both LWLINK and LWASM support generating raw binaries. ORG directives
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65 in the source code only serve to set the addresses that will be used for
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66 symbols but otherwise have no direct impact on the resulting binary.
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67 </para>
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68
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69 </section>
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70 <section>
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71 <title>DECB Binaries</title>
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72
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73 <para>A DECB binary is compatible with the LOADM command in Disk Extended
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74 Color Basic on the CoCo. They are also compatible with CLOADM from Extended
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75 Color Basic. These binaries include the load address of the binary as well
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76 as encoding an execution address. These binaries may contain multiple loadable
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77 sections, each of which has its own load address.</para>
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78
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79 <para>
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80 Each binary starts with a preamble. Each preamble is five bytes long. The
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81 first byte is zero. The next two bytes specify the number of bytes to load
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82 and the last two bytes specify the address to load the bytes at. Then, a
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83 string of bytes follows. After this string of bytes, there may be another
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84 preamble or a postamble. A postamble is also five bytes in length. The first
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85 byte of the postamble is $FF, the next two are zero, and the last two are
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86 the execution address for the binary.
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87 </para>
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88
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89 <para>
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90 Both LWASM and LWLINK can output this format.
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91 </para>
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92 </section>
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93
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94 <section>
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95 <title>OS9 Modules</title>
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96 <para>
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97
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98 Since version 2.5, LWASM is able to generate OS9 modules. The syntax is
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99 basically the same as for other assemblers. A module starts with the MOD
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100 directive and ends with the EMOD directive. The OS9 directive is provided
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101 as a shortcut for writing system calls.
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102
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103 </para>
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104
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105 <para>
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106
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107 LWASM does NOT provide an OS9Defs file. You must provide your own. Also note
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108 that the common practice of using "ifp1" around the inclusion of the OS9Defs
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109 file is discouraged as it is pointless and can lead to unintentional
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110 problems and phasing errors. Because LWASM reads each file exactly once,
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111 there is no benefit to restricting the inclusion to the first assembly pass.
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112
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113 </para>
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114
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115 <para>
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116
143
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117 As of version 4.5, LWASM also implements the standard data/code address
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118 streams for OS9 modules. That means that between MOD and EMOD, any RMB,
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119 RMD, RMQ, or equivalent directives will move the data address ahead and
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120 leave the code address unmodified. Outside of an actual module, both the
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121 code and data addresses are moved ahead equally. That last bit is critical
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122 to understand because it means any directives that follow an EMOD directive
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123 may have different results than other assemblers.
0
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124
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125 </para>
143
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126 <para>
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127
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128 Additionally, within a module body, the ORG directive sets only the data
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129 address, not the code address. However, outside a module body, ORG sets both
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130 addresses.
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131
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132 </para>
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133
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134 <para>
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135 Both code and data addresses are reset to 0 by the MOD directive.
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136 </para>
0
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137
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138 <para>
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139
152
a26b045c4e18 Added documentation about OS9 module support in lwlink
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140 As of version 4.5, LWLINK also supports creation of OS9 modules.
0
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141
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142 </para>
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143 </section>
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144
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145 <section>
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146 <title>Object Files</title>
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147 <para>LWASM supports generating a proprietary object file format which is
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148 described in <xref linkend="objchap">. LWLINK is then used to link these
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149 object files into a final binary in any of LWLINK's supported binary
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150 formats.</para>
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151
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152 <para>Object files also support the concept of sections which are not valid
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153 for other output types. This allows related code from each object file
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154 linked to be collapsed together in the final binary.</para>
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155
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156 <para>
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157 Object files are very flexible in that they allow references that are not
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158 known at assembly time to be resolved at link time. However, because the
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159 addresses of such references are not known at assembly time, there is no way
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160 for the assembler to deduce that an eight bit addressing mode is possible.
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161 That means the assember will default to using sixteen bit addressing
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162 whenever an external or cross-section reference is used.
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163 </para>
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164
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165 <para>
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166 As of LWASM 2.4, it is possible to force direct page addressing for an
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167 external reference. Care must be taken to ensure the resulting addresses
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168 are really in the direct page since the linker does not know what the direct
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169 page is supposed to be and does not emit errors for byte overflows.
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170 </para>
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171
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172 <para>
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173 It is also possible to use external references in an eight bit immediate
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174 mode instruction. In this case, only the low order eight bits will be used.
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175 Again, no byte overflows will be flagged.
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176 </para>
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177
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178
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179 </section>
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180
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181 </chapter>
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182
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183 <chapter>
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184 <title>LWASM</title>
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185 <para>
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186 The LWTOOLS assembler is called LWASM. This chapter documents the various
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187 features of the assembler. It is not, however, a tutorial on 6x09 assembly
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188 language programming.
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189 </para>
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190
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191 <section>
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192 <title>Command Line Options</title>
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193 <para>
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194 The binary for LWASM is called "lwasm". Note that the binary is in lower
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195 case. lwasm takes the following command line arguments.
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196 </para>
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197
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198 <variablelist>
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199
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200 <varlistentry>
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201 <term><option>--6309</option></term>
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202 <term><option>-3</option></term>
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203 <listitem>
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204 <para>
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205 This will cause the assembler to accept the additional instructions available
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206 on the 6309 processor. This is the default mode; this option is provided for
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207 completeness and to override preset command arguments.
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208 </para>
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209 </listitem>
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210 </varlistentry>
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211
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212 <varlistentry>
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213 <term><option>--6809</option></term>
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214 <term><option>-9</option></term>
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215 <listitem>
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216 <para>
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217 This will cause the assembler to reject instructions that are only available
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218 on the 6309 processor.
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219 </para>
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220 </listitem>
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221 </varlistentry>
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222
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223 <varlistentry>
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224 <term><option>--decb</option></term>
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225 <term><option>-b</option></term>
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226 <listitem>
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227 <para>
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228 Select the DECB output format target. Equivalent to <option>--format=decb</option>.
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229 </para>
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230 <para>While this is the default output format currently, it is not safe to rely
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231 on that fact. Future versions may have different defaults. It is also trivial
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232 to modify the source code to change the default. Thus, it is recommended to specify
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233 this option if you need DECB output.
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234 </listitem>
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235 </varlistentry>
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236
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237 <varlistentry>
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238 <term><option>--format=type</option></term>
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239 <term><option>-f type</option></term>
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240 <listitem>
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241 <para>
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242 Select the output format. Valid values are <option>obj</option> for the
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243 object file target, <option>decb</option> for the DECB LOADM format,
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244 <option>os9</option> for creating OS9 modules, and <option>raw</option> for
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245 a raw binary.
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246 </para>
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247 </listitem>
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248 </varlistentry>
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249
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250 <varlistentry>
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251 <term><option>--list[=file]</option></term>
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252 <term><option>-l[file]</option></term>
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253 <listitem>
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254 <para>
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255 Cause LWASM to generate a listing. If <option>file</option> is specified,
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256 the listing will go to that file. Otherwise it will go to the standard output
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257 stream. By default, no listing is generated. Unless <option>--symbols</option>
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258 is specified, the list will not include the symbol table.
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259 </para>
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260 </listitem>
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261 </varlistentry>
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262
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263 <varlistentry>
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264 <term><option>--symbols</option></term>
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265 <term><option>-s</option></term>
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266 <listitem>
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267 <para>
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268 Causes LWASM to generate a list of symbols when generating a listing.
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269 It has no effect unless a listing is being generated.
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270 </para>
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271 </listitem>
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272 </varlistentry>
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273
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274 <varlistentry>
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275 <term><option>--obj</option></term>
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276 <listitem>
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277 <para>
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278 Select the proprietary object file format as the output target.
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279 </para>
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280 </listitem>
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281 </varlistentry>
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282
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283 <varlistentry>
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284 <term><option>--output=FILE</option></term>
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285 <term><option>-o FILE</option></term>
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286 <listitem>
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287 <para>
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288 This option specifies the name of the output file. If not specified, the
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289 default is <option>a.out</option>.
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290 </para>
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291 </listitem>
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292 </varlistentry>
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293
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294 <varlistentry>
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295 <term><option>--pragma=pragma</option></term>
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296 <term><option>-p pragma</option></term>
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297 <listitem>
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298 <para>
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299 Specify assembler pragmas. Multiple pragmas are separated by commas. The
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300 pragmas accepted are the same as for the PRAGMA assembler directive described
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301 below.
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302 </para>
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303 </listitem>
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304 </varlistentry>
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305
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306 <varlistentry>
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307 <term><option>--raw</option></term>
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308 <term><option>-r</option></term>
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309 <listitem>
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310 <para>
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311 Select raw binary as the output target.
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312 </para>
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313 </listitem>
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314 </varlistentry>
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315
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316 <varlistentry>
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317 <term><option>--includedir=path</option></term>
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318 <term><option>-I path</option></term>
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319 <listitem>
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320 <para>
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321 Add <option>path</option> to the end of the include path.
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322 </para>
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323 </listitem>
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324 </varlistentry>
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325
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326 <varlistentry>
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327 <term><option>--help</option></term>
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328 <term><option>-?</option></term>
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329 <listitem>
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330 <para>
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331 Present a help screen describing the command line options.
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332 </para>
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333 </listitem>
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334 </varlistentry>
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335
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336 <varlistentry>
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337 <term><option>--usage</option></term>
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338 <listitem>
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339 <para>
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340 Provide a summary of the command line options.
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341 </para>
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342 </listitem>
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343 </varlistentry>
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344
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345 <varlistentry>
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346 <term><option>--version</option></term>
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347 <term><option>-V</option></term>
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348 <listitem>
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349 <para>
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350 Display the software version.
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351 </para>
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352 </listitem>
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353 </varlistentry>
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354
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355 <varlistentry>
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356 <term><option>--debug</option></term>
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357 <term><option>-d</option></term>
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358 <listitem>
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359 <para>
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360 Increase the debugging level. Only really useful to people hacking on the
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361 LWASM source code itself.
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362 </para>
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363 </listitem>
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364 </varlistentry>
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365
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366 </variablelist>
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367
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368 </section>
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369
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370 <section>
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371 <title>Dialects</title>
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372 <para>
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373 LWASM supports all documented MC6809 instructions as defined by Motorola.
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374 It also supports all known HD6309 instructions. While there is general
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375 agreement on the pneumonics for most of the 6309 instructions, there is some
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376 variance with the block transfer instructions. TFM for all four variations
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377 seems to have gained the most traction and, thus, this is the form that is
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378 recommended for LWASM. However, it also supports COPY, COPY-, IMP, EXP,
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379 TFRP, TFRM, TFRS, and TFRR. It further adds COPY+ as a synomym for COPY,
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380 IMPLODE for IMP, and EXPAND for EXP.
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381 </para>
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382
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383 <para>By default, LWASM accepts 6309 instructions. However, using the
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384 <parameter>--6809</parameter> parameter, you can cause it to throw errors on
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385 6309 instructions instead.</para>
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386
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387 <para>
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388 The standard addressing mode specifiers are supported. These are the
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389 hash sign ("#") for immediate mode, the less than sign ("&lt;") for forced
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390 eight bit modes, and the greater than sign ("&gt;") for forced sixteen bit modes.
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391 </para>
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392
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393 <para>
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394 Additionally, LWASM supports using the asterisk ("*") to indicate
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395 base page addressing. This should not be used in hand-written source code,
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396 however, because it is non-standard and may or may not be present in future
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397 versions of LWASM.
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398 </para>
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399
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400 </section>
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401
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402 <section>
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403 <title>Source Format</title>
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404
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405 <para>
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406 LWASM accepts plain text files in a relatively free form. It can handle
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407 lines terminated with CR, LF, CRLF, or LFCR which means it should be able
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408 to assemble files on any platform on which it compiles.
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diff changeset
409 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
410 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
411 Each line may start with a symbol. If a symbol is present, there must not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
412 be any whitespace preceding it. It is legal for a line to contain nothing
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
413 but a symbol.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
414 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
415 The op code is separated from the symbol by whitespace. If there is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
416 no symbol, there must be at least one white space character preceding it.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
417 If applicable, the operand follows separated by whitespace. Following the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
418 opcode and operand is an optional comment.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
419 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
420
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
421 <para> It is important to note that operands cannot contain any whitespace
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
422 except in the case of delimited strings. This is because the first
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
423 whitespace character will be interpreted as the separator between the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
424 operand column and the comment. This behaviour is required for approximate
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
425 source compatibility with other 6x09 assemblers. </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
426
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
427 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
428 A comment can also be introduced with a * or a ;. The comment character is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
429 optional for end of statement comments. However, if a symbol is the only
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
430 thing present on the line other than the comment, the comment character is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
431 mandatory to prevent the assembler from interpreting the comment as an opcode.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
432 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
433
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
434 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
435 For compatibility with the output generated by some C preprocessors, LWASM
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
436 will also ignore lines that begin with a #. This should not be used as a general
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
437 comment character, however.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
438 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
439
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
440 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
441 The opcode is not treated case sensitively. Neither are register names in
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
442 the operand fields. Symbols, however, are case sensitive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
443 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
444
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
445 <para> As of version 2.6, LWASM supports files with line numbers. If line
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
446 numbers are present, the line must start with a digit. The line number
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
447 itself must consist only of digits. The line number must then be followed
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
448 by either the end of the line or exactly one white space character. After
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
449 that white space character, the lines are interpreted exactly as above.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
450 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
451
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
452 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
453
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
454 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
455 <title>Symbols</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
456
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
457 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
458 Symbols have no length restriction. They may contain letters, numbers, dots,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
459 dollar signs, and underscores. They must start with a letter, dot, or
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
460 underscore.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
461 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
462
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
463 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
464 LWASM also supports the concept of a local symbol. A local symbol is one
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
465 which contains either a "?" or a "@", which can appear anywhere in the symbol.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
466 The scope of a local symbol is determined by a number of factors. First,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
467 each included file gets its own local symbol scope. A blank line will also
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
468 be considered a local scope barrier. Macros each have their own local symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
469 scope as well (which has a side effect that you cannot use a local symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
470 as an argument to a macro). There are other factors as well. In general,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
471 a local symbol is restricted to the block of code it is defined within.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
472 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
473
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
474 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
475 By default, unless assembling to the os9 target, a "$" in the symbol will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
476 also make it local. This can be controlled by the "dollarlocal" and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
477 "nodollarlocal" pragmas. In the absence of a pragma to the contrary, for
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
478 the os9 target, a "$" in the symbol will not make it considered local while
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
479 for all other targets it will.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
480 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
481
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
482 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
483
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
484 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
485 <title>Numbers and Expressions</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
486 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
487
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
488 Numbers can be expressed in binary, octal, decimal, or hexadecimal. Binary
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
489 numbers may be prefixed with a "%" symbol or suffixed with a "b" or "B".
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
490 Octal numbers may be prefixed with "@" or suffixed with "Q", "q", "O", or
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
491 "o". Hexadecimal numbers may be prefixed with "$", "0x" or "0X", or suffixed
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
492 with "H". No prefix or suffix is required for decimal numbers but they can
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
493 be prefixed with "&amp;" if desired. Any constant which begins with a letter
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
494 must be expressed with the correct prefix base identifier or be prefixed
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
495 with a 0. Thus hexadecimal FF would have to be written either 0FFH or $FF.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
496 Numbers are not case sensitive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
497
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
498 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
499
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
500 <para> A symbol may appear at any point where a number is acceptable. The
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
501 special symbol "*" can be used to represent the starting address of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
502 current source line within expressions. </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
503
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
504 <para>The ASCII value of a character can be included by prefixing it with a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
505 single quote ('). The ASCII values of two characters can be included by
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
506 prefixing the characters with a quote (").</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
507
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
508 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
509
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
510 LWASM supports the following basic binary operators: +, -, *, /, and %.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
511 These represent addition, subtraction, multiplication, division, and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
512 modulus. It also supports unary negation and unary 1's complement (- and ^
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
513 respectively). It is also possible to use ~ for the unary 1's complement
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
514 operator. For completeness, a unary positive (+) is supported though it is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
515 a no-op. LWASM also supports using |, &, and ^ for bitwise or, bitwise and,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
516 and bitwise exclusive or respectively.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
517
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
518 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
519
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
520 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
521
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
522 Operator precedence follows the usual rules. Multiplication, division, and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
523 modulus take precedence over addition and subtraction. Unary operators take
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
524 precedence over binary operators. Bitwise operators are lower precdence
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
525 than addition and subtraction. To force a specific order of evaluation,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
526 parentheses can be used in the usual manner.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
527
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
528 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
529
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
530 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
531
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
532 As of LWASM 2.5, the operators && and || are recognized for boolean and and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
533 boolean or respectively. They will return either 0 or 1 (false or true).
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
534 They have the lowest precedence of all the binary operators.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
535
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
536 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
537
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
538 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
539
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
540 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
541 <title>Assembler Directives</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
542 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
543 Various directives can be used to control the behaviour of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
544 assembler or to include non-code/data in the resulting output. Those directives
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
545 that are not described in detail in other sections of this document are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
546 described below.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
547 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
548
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
549 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
550 <title>Data Directives</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
551 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
552 <varlistentry><term>FCB <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
553 <term>.DB <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
554 <term>.BYTE <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
555 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
556 <para>Include one or more constant bytes (separated by commas) in the output.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
557 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
558 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
559
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
560 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
561 <term>FDB <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
562 <term>.DW <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
563 <term>.WORD <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
564 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
565 <para>Include one or more words (separated by commas) in the output.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
566 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
567 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
568
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
569 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
570 <term>FQB <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
571 <term>.QUAD <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
572 <term>.4BYTE <parameter>expr[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
573 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
574 <para>Include one or more double words (separated by commas) in the output.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
575 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
576 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
577
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
578 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
579 <term>FCC <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
580 <term>.ASCII <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
581 <term>.STR <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
582 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
583 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
584 Include a string of text in the output. The first character of the operand
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
585 is the delimiter which must appear as the last character and cannot appear
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
586 within the string. The string is included with no modifications>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
587 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
588 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
589 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
590
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
591 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
592 <term>FCN <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
593 <term>.ASCIZ <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
594 <term>.STRZ <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
595 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
596 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
597 Include a NUL terminated string of text in the output. The first character of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
598 the operand is the delimiter which must appear as the last character and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
599 cannot appear within the string. A NUL byte is automatically appended to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
600 the string.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
601 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
602 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
603 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
604
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
605 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
606 <term>FCS <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
607 <term>.ASCIS <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
608 <term>.STRS <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
609 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
610 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
611 Include a string of text in the output with bit 7 of the final byte set. The
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
612 first character of the operand is the delimiter which must appear as the last
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
613 character and cannot appear within the string.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
614 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
615 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
616 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
617
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
618 <varlistentry><term>ZMB <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
619 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
620 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
621 Include a number of NUL bytes in the output. The number must be fully resolvable
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
622 during pass 1 of assembly so no forward or external references are permitted.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
623 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
624 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
625 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
626
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
627 <varlistentry><term>ZMD <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
628 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
629 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
630 Include a number of zero words in the output. The number must be fully
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
631 resolvable during pass 1 of assembly so no forward or external references are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
632 permitted.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
633 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
634 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
635 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
636
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
637 <varlistentry><term>ZMQ <parameter>expr<parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
638 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
639 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
640 Include a number of zero double-words in the output. The number must be fully
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
641 resolvable during pass 1 of assembly so no forward or external references are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
642 permitted.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
643 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
644 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
645 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
646
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
647 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
648 <term>RMB <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
649 <term>.BLKB <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
650 <term>.DS <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
651 <term>.RS <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
652 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
653 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
654 Reserve a number of bytes in the output. The number must be fully resolvable
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
655 during pass 1 of assembly so no forward or external references are permitted.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
656 The value of the bytes is undefined.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
657 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
658 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
659 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
660
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
661 <varlistentry><term>RMD <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
662 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
663 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
664 Reserve a number of words in the output. The number must be fully
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
665 resolvable during pass 1 of assembly so no forward or external references are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
666 permitted. The value of the words is undefined.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
667 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
668 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
669 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
670
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
671 <varlistentry><term>RMQ <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
672 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
673 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
674 Reserve a number of double-words in the output. The number must be fully
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
675 resolvable during pass 1 of assembly so no forward or external references are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
676 permitted. The value of the double-words is undefined.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
677 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
678 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
679 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
680
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
681 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
682 <term>INCLUDEBIN <parameter>filename</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
683 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
684 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
685 Treat the contents of <parameter>filename</parameter> as a string of bytes to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
686 be included literally at the current assembly point. This has the same effect
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
687 as converting the file contents to a series of FCB statements and including
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
688 those at the current assembly point.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
689 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
690
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
691 <para> If <parameter>filename</parameter> beings with a /, the file name
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
692 will be taken as absolute. Otherwise, the current directory will be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
693 searched followed by the search path in the order specified.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
694
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
695 <para> Please note that absolute path detection including drive letters will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
696 not function correctly on Windows platforms. Non-absolute inclusion will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
697 work, however.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
698
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
699 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
700 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
701
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
702 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
703
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
704 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
705
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
706 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
707 <title>Address Definition</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
708 <para>The directives in this section all control the addresses of symbols
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
709 or the assembly process itself.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
710
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
711 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
712 <varlistentry><term>ORG <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
713 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
714 <para>Set the assembly address. The address must be fully resolvable on the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
715 first pass so no external or forward references are permitted. ORG is not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
716 permitted within sections when outputting to object files. For the DECB
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
717 target, each ORG directive after which output is generated will cause
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
718 a new preamble to be output. ORG is only used to determine the addresses
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
719 of symbols when the raw target is used.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
720 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
721 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
722 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
723
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
724 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
725 <term><parameter>sym</parameter> EQU <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
726 <term><parameter>sym</parameter> = <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
727 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
728 <para>Define the value of <parameter>sym</parameter> to be <parameter>expr</parameter>.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
729 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
730 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
731
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
732 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
733 <term><parameter>sym</parameter> SET <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
734 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
735 <para>Define the value of <parameter>sym</parameter> to be <parameter>expr</parameter>.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
736 Unlike EQU, SET permits symbols to be defined multiple times as long as SET
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
737 is used for all instances. Use of the symbol before the first SET statement
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
738 that sets its value is undefined.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
739 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
740 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
741
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
742 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
743 <term>SETDP <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
744 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
745 <para>Inform the assembler that it can assume the DP register contains
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
746 <parameter>expr</parameter>. This directive is only advice to the assembler
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
747 to determine whether an address is in the direct page and has no effect
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
748 on the contents of the DP register. The value must be fully resolved during
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
749 the first assembly pass because it affects the sizes of subsequent instructions.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
750 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
751 <para>This directive has no effect in the object file target.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
752 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
753 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
754 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
755
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
756 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
757 <term>ALIGN <parameter>expr</parameter>[,<parameter>value</parameter>]</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
758 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
759
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
760 <para>Force the current assembly address to be a multiple of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
761 <parameter>expr</parameter>. If <parameter>value</parameter> is not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
762 specified, a series of NUL bytes is output to force the alignment, if
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
763 required. Otherwise, the low order 8 bits of <parameter>value</parameter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
764 will be used as the fill. The alignment value must be fully resolved on the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
765 first pass because it affects the addresses of subsquent instructions.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
766 However, <parameter>value</parameter> may include forward references; as
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
767 long as it resolves to a constant for the second pass, the value will be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
768 accepted.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
769
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
770 <para>Unless <parameter>value</parameter> is specified as something like $12,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
771 this directive is not suitable for inclusion in the middle of actual code.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
772 The default padding value is $00 which is intended to be used within data
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
773 blocks. </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
774
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
775 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
776 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
777
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
778 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
779
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
780 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
781
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
782 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
783 <title>Conditional Assembly</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
784 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
785 Portions of the source code can be excluded or included based on conditions
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
786 known at assembly time. Conditionals can be nested arbitrarily deeply. The
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
787 directives associated with conditional assembly are described in this section.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
788 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
789 <para>All conditionals must be fully bracketed. That is, every conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
790 statement must eventually be followed by an ENDC at the same level of nesting.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
791 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
792 <para>Conditional expressions are only evaluated on the first assembly pass.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
793 It is not possible to game the assembly process by having a conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
794 change its value between assembly passes. Due to the underlying architecture
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
795 of LWASM, there is no possible utility to IFP1 and IFP2, nor can they, as of LWASM 3.0, actually
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
796 be implemented meaningfully. Thus there is not and never will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
797 be any equivalent of IFP1 or IFP2 as provided by other assemblers. Use of those opcodes
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
798 will throw a warning and be ignored.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
799
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
800 <para>It is important to note that if a conditional does not resolve to a constant
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
801 during the first parsing pass, an error will be thrown. This is unavoidable because the assembler
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
802 must make a decision about which source to include and which source to exclude at this stage.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
803 Thus, expressions that work normally elsewhere will not work for conditions.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
804
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
805 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
806 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
807 <term>IFEQ <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
808 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
809 <para>If <parameter>expr</parameter> evaluates to zero, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
810 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
811 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
812 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
813 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
814
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
815 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
816 <term>IFNE <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
817 <term>IF <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
818 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
819 <para>If <parameter>expr</parameter> evaluates to a non-zero value, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
820 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
821 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
822 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
823 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
824
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
825 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
826 <term>IFGT <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
827 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
828 <para>If <parameter>expr</parameter> evaluates to a value greater than zero, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
829 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
830 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
831 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
832 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
833
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
834 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
835 <term>IFGE <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
836 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
837 <para>If <parameter>expr</parameter> evaluates to a value greater than or equal to zero, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
838 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
839 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
840 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
841 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
842
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
843 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
844 <term>IFLT <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
845 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
846 <para>If <parameter>expr</parameter> evaluates to a value less than zero, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
847 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
848 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
849 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
850 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
851
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
852 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
853 <term>IFLE <parameter>expr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
854 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
855 <para>If <parameter>expr</parameter> evaluates to a value less than or equal to zero , the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
856 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
857 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
858 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
859 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
860
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
861 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
862 <term>IFDEF <parameter>sym</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
863 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
864 <para>If <parameter>sym</parameter> is defined at this point in the assembly
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
865 process, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
866 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
867 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
868 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
869 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
870
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
871 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
872 <term>IFNDEF <parameter>sym</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
873 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
874 <para>If <parameter>sym</parameter> is not defined at this point in the assembly
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
875 process, the conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
876 will be considered true.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
877 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
878 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
879 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
880
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
881 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
882 <term>ELSE</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
883 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
884 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
885 If the preceding conditional at the same level of nesting was false, the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
886 statements following will be assembled. If the preceding conditional at
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
887 the same level was true, the statements following will not be assembled.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
888 Note that the preceding conditional might have been another ELSE statement
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
889 although this behaviour is not guaranteed to be supported in future versions
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
890 of LWASM.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
891 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
892 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
893
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
894 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
895 <term>ENDC</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
896 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
897 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
898 This directive marks the end of a conditional construct. Every conditional
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
899 construct must end with an ENDC directive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
900 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
901 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
902 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
903
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
904 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
905 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
906
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
907 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
908 <title>OS9 Target Directives</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
909
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
910 <para>This section includes directives that apply solely to the OS9
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
911 target.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
912
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
913 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
914
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
915 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
916 <term>OS9 <parameter>syscall</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
917 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
918 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
919
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
920 This directive generates a call to the specified system call. <parameter>syscall</parameter> may be an arbitrary expression.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
921
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
922 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
923 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
924 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
925
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
926 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
927 <term>MOD <parameter>size</parameter>,<parameter>name</parameter>,<parameter>type</parameter>,<parameter>flags</parameter>,<parameter>execoff</parameter>,<parameter>datasize</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
928 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
929 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
930
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
931 This tells LWASM that the beginning of the actual module is here. It will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
932 generate a module header based on the parameters specified. It will also
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
933 begin calcuating the module CRC.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
934
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
935 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
936
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
937 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
938
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
939 The precise meaning of the various parameters is beyond the scope of this
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
940 document since it is not a tutorial on OS9 module programming.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
941
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
942 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
943
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
944 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
945 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
946
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
947 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
948 <term>EMOD</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
949 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
950 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
951
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
952 This marks the end of a module and causes LWASM to emit the calculated CRC
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
953 for the module.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
954
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
955 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
956 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
957
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
958 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
959 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
960
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
961 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
962 <title>Miscelaneous Directives</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
963
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
964 <para>This section includes directives that do not fit into the other
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
965 categories.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
966
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
967 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
968
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
969 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
970 <term>INCLUDE <parameter>filename</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
971 <term>USE <parameter>filename</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
972
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
973 <listitem> <para> Include the contents of <parameter>filename</parameter> at
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
974 this point in the assembly as though it were a part of the file currently
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
975 being processed. Note that if whitespace appears in the name of the file,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
976 you must enclose <parameter>filename</parameter> in quotes.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
977 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
978
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
979 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
980 Note that the USE variation is provided only for compatibility with other
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
981 assemblers. It is recommended to use the INCLUDE variation.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
982
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
983 <para>If <parameter>filename</parameter> begins with a &quot;/&quot;, it is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
984 interpreted as an absolute path. If it does not, the search path will be used
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
985 to find the file. First, the directory containing the file that contains this
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
986 directive. (Includes within an included file are relative to the included file,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
987 not the file that included it.) If the file is not found there, the include path
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
988 is searched. If it is still not found, an error will be thrown. Note that the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
989 current directory as understood by your shell or operating system is not searched.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
990 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
991
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
992 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
993 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
994
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
995 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
996 <term>END <parameter>[expr]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
997 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
998 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
999 This directive causes the assembler to stop assembling immediately as though
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1000 it ran out of input. For the DECB target only, <parameter>expr</parameter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1001 can be used to set the execution address of the resulting binary. For all
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1002 other targets, specifying <parameter>expr</parameter> will cause an error.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1003 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1004 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1005 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1006
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1007 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1008 <term>ERROR <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1009 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1010 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1011 Causes a custom error message to be printed at this line. This will cause
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1012 assembly to fail. This directive is most useful inside conditional constructs
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1013 to cause assembly to fail if some condition that is known bad happens. Everything
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1014 from the directive to the end of the line is considered the error message.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1015 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1016 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1017 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1018
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1019 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1020 <term>WARNING <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1021 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1022 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1023 Causes a custom warning message to be printed at this line. This will not cause
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1024 assembly to fail. This directive is most useful inside conditional constructs
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1025 or include files to alert the programmer to a deprecated feature being used
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1026 or some other condition that may cause trouble later, but which may, in fact,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1027 not cause any trouble.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1028 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1029 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1030 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1031
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1032 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1033 <term>.MODULE <parameter>string</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1034 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1035 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1036 This directive is ignored for most output targets. If the output target
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1037 supports encoding a module name into it, <parameter>string</parameter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1038 will be used as the module name.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1039 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1040 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1041 As of version 3.0, no supported output targets support this directive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1042 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1043 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1044 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1045
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1046 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1047 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1048
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1049 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1050
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1051 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1052 <title>Macros</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1053 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1054 LWASM is a macro assembler. A macro is simply a name that stands in for a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1055 series of instructions. Once a macro is defined, it is used like any other
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1056 assembler directive. Defining a macro can be considered equivalent to adding
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1057 additional assembler directives.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1058 </para>
60
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1059
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1060 <para>Macros may accept parameters. These parameters are referenced within a
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1061 macro by the a backslash ("\") followed by a digit 1 through 9 for the first
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1062 through ninth parameters. They may also be referenced by enclosing the
60
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1063 decimal parameter number in braces ("{num}"). The special expansion "\*"
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1064 translates to the exact parameter string, including all parameters, passed
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1065 to the macro. These parameter references are replaced with the verbatim text
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1066 of the parameter passed to the macro. A reference to a non-existent
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1067 parameter will be replaced by an empty string. Macro parameters are expanded
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1068 everywhere on each source line. That means the parameter to a macro could be
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1069 used as a symbol or it could even appear in a comment or could cause an
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1070 entire source line to be commented out when the macro is expanded. </para>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1071
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1072 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1073 Parameters passed to a macro are separated by commas and the parameter list
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1074 is terminated by any whitespace. This means that neither a comma nor whitespace
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1075 may be included in a macro parameter.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1076 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1077 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1078 Macro expansion is done recursively. That is, within a macro, macros are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1079 expanded. This can lead to infinite loops in macro expansion. If the assembler
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1080 hangs for a long time while assembling a file that uses macros, this may be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1081 the reason.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1082
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1083 <para>Each macro expansion receives its own local symbol context which is not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1084 inherited by any macros called by it nor is it inherited from the context
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1085 the macro was instantiated in. That means it is possible to use local symbols
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1086 within macros without having them collide with symbols in other macros or
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1087 outside the macro itself. However, this also means that using a local symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1088 as a parameter to a macro, while legal, will not do what it would seem to do
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1089 as it will result in looking up the local symbol in the macro's symbol context
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1090 rather than the enclosing context where it came from, likely yielding either
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1091 an undefined symbol error or bizarre assembly results.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1092 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1093 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1094 Note that there is no way to define a macro as local to a symbol context. All
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1095 macros are part of the global macro namespace. However, macros have a separate
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1096 namespace from symbols so it is possible to have a symbol with the same name
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1097 as a macro.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1098 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1099
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1100 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1101 Macros are defined only during the first pass. Macro expansion also
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1102 only occurs during the first pass. On the second pass, the macro
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1103 definition is simply ignored. Macros must be defined before they are used.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1104 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1105
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1106 <para>The following directives are used when defining macros.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1107
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1108 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1109 <varlistentry>
51
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1110 <term><parameter>macroname</parameter> MACRO [NOEXPAND]</term>
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1111 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1112 <para>This directive is used to being the definition of a macro called
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1113 <parameter>macroname</parameter>. If <parameter>macroname</parameter> already
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1114 exists, it is considered an error. Attempting to define a macro within a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1115 macro is undefined. It may work and it may not so the behaviour should not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1116 be relied upon.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1117 </para>
51
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1118
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1119 <para>If NOEXPAND is specified, the macro will not be expanded in a program
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1120 listing. Instead, all bytes emitted by all instructions within the macro
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1121 will appear to be emitted on the line where the macro is invoked, starting
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1122 at the address of the line of the invokation. If the macro uses ORG or other
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1123 directives that define symbols or change the assembly address, these things
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1124 will also be hidden (except in the symbol table) and the output bytes will
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1125 appear with incorrect address attribution. Thus, NOEXPAND should only be
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1126 used for macros that do not mess with the assembly address or otherwise
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1127 define symbols that should be visible.</para>
fd1ecc5d6e69 Added mention of NOEXPAND macro argument in manual
lost@l-w.ca
parents: 0
diff changeset
1128
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1129 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1130 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1131
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1132 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1133 <term>ENDM</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1134 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1135 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1136 This directive indicates the end of the macro currently being defined. It
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1137 causes the assembler to resume interpreting source lines as normal.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1138 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1139 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1140 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1141
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1142 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1143
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1144 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1145 <title>Structures</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1146 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1147
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1148 Structures are used to group related data in a fixed structure. A structure
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1149 consists a number of fields, defined in sequential order and which take up
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1150 specified size. The assembler does not enforce any means of access within a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1151 structure; it assumes that whatever you are doing, you intended to do.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1152 There are two pseudo ops that are used for defining structures.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1153
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1154 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1155
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1156 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1157 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1158 <term><parameter>structname</parameter> STRUCT</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1159 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1160 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1161
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1162 This directive is used to begin the definition of a structure with name
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1163 <parameter>structname</parameter>. Subsequent statements all form part of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1164 the structure definition until the end of the structure is declared.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1165
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1166 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1167 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1168 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1169 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1170 <term>ENDSTRUCT</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1171 <term>ENDS</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1172 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1173 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1174 This directive ends the definition of the structure. ENDSTRUCT is the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1175 preferred form. Prior to version 3.0 of LWASM, ENDS was used to end a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1176 section instead of a structure.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1177 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1178 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1179 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1180 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1181
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1182 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1183
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1184 Within a structure definition, only reservation pseudo ops are permitted.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1185 Anything else will cause an assembly error.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1186 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1187
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1188 <para> Once a structure is defined, you can reserve an area of memory in the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1189 same structure by using the structure name as the opcode. Structures can
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1190 also contain fields that are themselves structures. See the example
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1191 below.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1192
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1193 <programlisting>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1194 tstruct2 STRUCT
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1195 f1 rmb 1
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1196 f2 rmb 1
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1197 ENDSTRUCT
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1198
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1199 tstruct STRUCT
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1200 field1 rmb 2
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1201 field2 rmb 3
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1202 field3 tstruct2
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1203 ENDSTRUCT
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1204
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1205 ORG $2000
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1206 var1 tstruct
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1207 var2 tstruct2
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1208 </programlisting>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1209
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1210 <para>Fields are referenced using a dot (.) as a separator. To refer to the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1211 generic offset within a structure, use the structure name to the left of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1212 dot. If referring to a field within an actual variable, use the variable's
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1213 symbol name to the left of the dot.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1214
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1215 <para>You can also refer to the actual size of a structure (or a variable
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1216 declared as a structure) using the special symbol sizeof{structname} where
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1217 structname will be the name of the structure or the name of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1218 variable.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1219
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1220 <para>Essentially, structures are a shortcut for defining a vast number of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1221 symbols. When a structure is defined, the assembler creates symbols for the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1222 various fields in the form structname.fieldname as well as the appropriate
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1223 sizeof{structname} symbol. When a variable is declared as a structure, the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1224 assembler does the same thing using the name of the variable. You will see
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1225 these symbols in the symbol table when the assembler is instructed to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1226 provide a listing. For instance, the above listing will create the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1227 following symbols (symbol values in parentheses): tstruct2.f1 (0),
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1228 tstruct2.f2 (1), sizeof{tstruct2} (2), tstruct.field1 (0), tstruct.field2
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1229 (2), tstruct.field3 (5), tstruct.field3.f1 (5), tstruct.field3.f2 (6),
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1230 sizeof{tstruct.field3} (2), sizeof{tstruct} (7), var1 {$2000}, var1.field1
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1231 {$2000}, var1.field2 {$2002}, var1.field3 {$2005}, var1.field3.f1 {$2005},
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1232 var1.field3.f2 {$2006}, sizeof(var1.field3} (2), sizeof{var1} (7), var2
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1233 ($2007), var2.f1 ($2007), var2.f2 ($2008), sizeof{var2} (2). </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1234
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1235 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1236
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1237 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1238 <title>Object Files and Sections</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1239 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1240 The object file target is very useful for large project because it allows
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1241 multiple files to be assembled independently and then linked into the final
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1242 binary at a later time. It allows only the small portion of the project
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1243 that was modified to be re-assembled rather than requiring the entire set
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1244 of source code to be available to the assembler in a single assembly process.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1245 This can be particularly important if there are a large number of macros,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1246 symbol definitions, or other metadata that uses resources at assembly time.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1247 By far the largest benefit, however, is keeping the source files small enough
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1248 for a mere mortal to find things in them.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1249 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1250
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1251 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1252 With multi-file projects, there needs to be a means of resolving references to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1253 symbols in other source files. These are known as external references. The
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1254 addresses of these symbols cannot be known until the linker joins all the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1255 object files into a single binary. This means that the assembler must be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1256 able to output the object code without knowing the value of the symbol. This
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1257 places some restrictions on the code generated by the assembler. For
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1258 example, the assembler cannot generate direct page addressing for instructions
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1259 that reference external symbols because the address of the symbol may not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1260 be in the direct page. Similarly, relative branches and PC relative addressing
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1261 cannot be used in their eight bit forms. Everything that must be resolved
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1262 by the linker must be assembled to use the largest address size possible to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1263 allow the linker to fill in the correct value at link time. Note that the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1264 same problem applies to absolute address references as well, even those in
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1265 the same source file, because the address is not known until link time.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1266 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1267
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1268 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1269 It is often desired in multi-file projects to have code of various types grouped
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1270 together in the final binary generated by the linker as well. The same applies
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1271 to data. In order for the linker to do that, the bits that are to be grouped
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1272 must be tagged in some manner. This is where the concept of sections comes in.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1273 Each chunk of code or data is part of a section in the object file. Then,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1274 when the linker reads all the object files, it coalesces all sections of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1275 same name into a single section and then considers it as a unit.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1276 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1277
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1278 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1279 The existence of sections, however, raises a problem for symbols even
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1280 within the same source file. Thus, the assembler must treat symbols from
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1281 different sections within the same source file in the same manner as external
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1282 symbols. That is, it must leave them for the linker to resolve at link time,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1283 with all the limitations that entails.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1284 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1285
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1286 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1287 In the object file target mode, LWASM requires all source lines that
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1288 cause bytes to be output to be inside a section. Any directives that do
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1289 not cause any bytes to be output can appear outside of a section. This includes
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1290 such things as EQU or RMB. Even ORG can appear outside a section. ORG, however,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1291 makes no sense within a section because it is the linker that determines
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1292 the starting address of the section's code, not the assembler.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1293 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1294
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1295 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1296 All symbols defined globally in the assembly process are local to the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1297 source file and cannot be exported. All symbols defined within a section are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1298 considered local to the source file unless otherwise explicitly exported.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1299 Symbols referenced from external source files must be declared external,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1300 either explicitly or by asking the assembler to assume that all undefined
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1301 symbols are external.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1302 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1303
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1304 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1305 It is often handy to define a number of memory addresses that will be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1306 used for data at run-time but which need not be included in the binary file.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1307 These memory addresses are not initialized until run-time, either by the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1308 program itself or by the program loader, depending on the operating environment.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1309 Such sections are often known as BSS sections. LWASM supports generating
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1310 sections with a BSS attribute set which causes the section definition including
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1311 symbols exported from that section and those symbols required to resolve
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1312 references from the local file, but with no actual code in the object file.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1313 It is illegal for any source lines within a BSS flagged section to cause any
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1314 bytes to be output.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1315 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1316
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1317 <para>The following directives apply to section handling.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1318
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1319 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1320 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1321 <term>SECTION <parameter>name[,flags]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1322 <term>SECT <parameter>name[,flags]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1323 <term>.AREA <parameter>name[,flags]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1324 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1325 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1326 Instructs the assembler that the code following this directive is to be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1327 considered part of the section <parameter>name</parameter>. A section name
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1328 may appear multiple times in which case it is as though all the code from
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1329 all the instances of that section appeared adjacent within the source file.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1330 However, <parameter>flags</parameter> may only be specified on the first
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1331 instance of the section.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1332 </para>
168
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1333
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1334 <para><parameter>flags</parameter> is a comma separated list of flags. If a
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1335 flag is "bss", the section will be treated as a BSS section and no
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1336 statements that generate output are permitted.</para>
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1337
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1338 <para>If the flag is "constant",
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1339 the same restrictions apply as for BSS sections. Additionally, all symbols
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1340 defined in a constant section define absolute values and will not be
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1341 adjusted by the linker at link time. Constant sections cannot define
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1342 complex expressions for symbols; the value must be fully defined at assembly
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1343 time. Additionally, multiple instances of a constant section do not
1e0a0e6cd918 Documentation updates
lost@l-w.ca
parents: 152
diff changeset
1344 coalesce into a single addressing unit; each instance starts again at offset
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1345 0.</para>
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1346
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1347 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1348 If the section name is "bss" or ".bss" in any combination of upper and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1349 lower case, the section is assumed to be a BSS section. In that case,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1350 the flag <parameter>!bss</parameter> can be used to override this assumption.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1351 </para>
168
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lost@l-w.ca
parents: 152
diff changeset
1352
1e0a0e6cd918 Documentation updates
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diff changeset
1353 <para> If the section name is "_constants" or "_constant", in any
1e0a0e6cd918 Documentation updates
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diff changeset
1354 combination of upper and lower case, the section is assumed to be a constant
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1355 section. This assumption can be overridden with the "!constant"
1e0a0e6cd918 Documentation updates
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parents: 152
diff changeset
1356 flag.</para>
1e0a0e6cd918 Documentation updates
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diff changeset
1357
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1358 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1359 If assembly is already happening within a section, the section is implicitly
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1360 ended and the new section started. This is not considered an error although
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1361 it is recommended that all sections be explicitly closed.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1362 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1363 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1364 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1365
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1366 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1367 <term>ENDSECTION</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1368 <term>ENDSECT</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1369 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1370 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1371 This directive ends the current section. This puts assembly outside of any
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1372 sections until the next SECTION directive. ENDSECTION is the preferred form.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1373 Prior to version 3.0 of LWASM, ENDS could also be used to end a section but
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1374 as of version 3.0, it is now an alias for ENDSTRUCT instead.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1375 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1376 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1377
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1378 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1379 <term><parameter>sym</parameter> EXTERN</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1380 <term><parameter>sym</parameter> EXTERNAL</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1381 <term><parameter>sym</parameter> IMPORT</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1382 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1383 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1384 This directive defines <parameter>sym</parameter> as an external symbol.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1385 This directive may occur at any point in the source code. EXTERN definitions
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1386 are resolved on the first pass so an EXTERN definition anywhere in the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1387 source file is valid for the entire file. The use of this directive is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1388 optional when the assembler is instructed to assume that all undefined
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1389 symbols are external. In fact, in that mode, if the symbol is referenced
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1390 before the EXTERN directive, an error will occur.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1391 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1392 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1393 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1394
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1395 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1396 <term><parameter>sym</parameter> EXPORT</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1397 <term><parameter>sym</parameter> .GLOBL</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1398
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1399 <term>EXPORT <parameter>sym</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1400 <term>.GLOBL <parameter>sym</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1401
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1402 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1403 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1404 This directive defines <parameter>sym</parameter> as an exported symbol.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1405 This directive may occur at any point in the source code, even before the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1406 definition of the exported symbol.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1407 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1408 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1409 Note that <parameter>sym</parameter> may appear as the operand or as the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1410 statement's symbol. If there is a symbol on the statement, that will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1411 take precedence over any operand that is present.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1412 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1413 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1414
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1415 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1416
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1417 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1418 <term><parameter>sym</parameter> EXTDEP</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1419 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1420
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1421 <para>This directive forces an external dependency on
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1422 <parameter>sym</parameter>, even if it is never referenced anywhere else in
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1423 this file.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1424
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1425 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1426 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1427 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1428
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1429 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1430
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
1431 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1432 <title>Assembler Modes and Pragmas</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1433 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1434 There are a number of options that affect the way assembly is performed.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1435 Some of these options can only be specified on the command line because
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1436 they determine something absolute about the assembly process. These include
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1437 such things as the output target. Other things may be switchable during
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1438 the assembly process. These are known as pragmas and are, by definition,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1439 not portable between assemblers.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1440 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1441
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1442 <para>LWASM supports a number of pragmas that affect code generation or
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1443 otherwise affect the behaviour of the assembler. These may be specified by
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1444 way of a command line option or by assembler directives. The directives
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1445 are as follows.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1446 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1447
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1448 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1449 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1450 <term>PRAGMA <parameter>pragma[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1451 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1452 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1453 Specifies that the assembler should bring into force all <parameter>pragma</parameter>s
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1454 specified. Any unrecognized pragma will cause an assembly error. The new
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1455 pragmas will take effect immediately. This directive should be used when
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1456 the program will assemble incorrectly if the pragma is ignored or not supported.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1457 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1458 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1459 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1460
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1461 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1462 <term>*PRAGMA <parameter>pragma[,...]</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1463 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1464 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1465 This is identical to the PRAGMA directive except no error will occur with
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1466 unrecognized or unsupported pragmas. This directive, by virtue of starting
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1467 with a comment character, will also be ignored by assemblers that do not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1468 support this directive. Use this variation if the pragma is not required
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1469 for correct functioning of the code.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1470 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1471 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1472 </varlistentry>
111
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
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parents: 68
diff changeset
1473
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1474 <varlistentry>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1475 <term>*PRAGMAPUSH <parameter>pragma[,...]</parameter></term>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1476 <listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1477 <para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1478 This directive saves the current state of the specified pragma(s) for later retrieval. See discussion below for more information.
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1479 </para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1480
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1481 <para>This directive will not throw any errors for any reason.</para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1482
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1483 </listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1484 </varlistentry>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1485
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1486 <varlistentry>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1487 <term>*PRAGMAPOP <parameter>pragma[,...]</parameter></term>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1488 <listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1489 <para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1490 This directive restores the previously saved state of the specified pragma(s). See discussion below for more information.
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1491 </para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1492
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1493 <para>This directive will not throw any errors for any reason.</para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1494
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1495 </listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1496 </varlistentry>
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1497 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1498
207
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1499 <para>Each pragma supported has a positive version and a negative version.
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1500 The positive version enables the pragma while the negative version disables
207
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1501 it. The negatitve version is simply the positive version with "no" prefixed
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1502 to it. For instance, "pragma" vs. "nopragma". When only one version is
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1503 listed below, its opposite can be obtained by prepending "no" if it is not
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1504 present or removing "no" from the beginning if it is present.</para>
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1505
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1506 <para>Pragmas are not case sensitive.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1507
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1508 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1509 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1510 <term>index0tonone</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1511 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1512 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1513 When in force, this pragma enables an optimization affecting indexed addressing
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1514 modes. When the offset expression in an indexed mode evaluates to zero but is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1515 not explicity written as 0, this will replace the operand with the equivalent
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1516 no offset mode, thus creating slightly faster code. Because of the advantages
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1517 of this optimization, it is enabled by default.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1518 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1519 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1520 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1521
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1522 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1523 <term>cescapes</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1524 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1525 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1526 This pragma will cause strings in the FCC, FCS, and FCN pseudo operations to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1527 have C-style escape sequences interpreted. The one departure from the official
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1528 spec is that unrecognized escape sequences will return either the character
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1529 immediately following the backslash or some undefined value. Do not rely
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1530 on the behaviour of undefined escape sequences.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1531 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1532 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1533 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1534
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1535 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1536 <term>importundefexport</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1537 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1538 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1539 This pragma is only valid for targets that support external references. When
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1540 in force, it will cause the EXPORT directive to act as IMPORT if the symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1541 to be exported is not defined. This is provided for compatibility with the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1542 output of gcc6809 and should not be used in hand written code. Because of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1543 the confusion this pragma can cause, it is disabled by default.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1544 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1545 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1546 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1547
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1548 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1549 <term>undefextern</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1550 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1551 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1552 This pragma is only valid for targets that support external references. When in
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1553 force, if the assembler sees an undefined symbol on the second pass, it will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1554 automatically define it as an external symbol. This automatic definition will
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1555 apply for the remainder of the assembly process, even if the pragma is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1556 subsequently turned off. Because this behaviour would be potentially surprising,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1557 this pragma defaults to off.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1558 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1559 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1560 The primary use for this pragma is for projects that share a large number of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1561 symbols between source files. In such cases, it is impractical to enumerate
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1562 all the external references in every source file. This allows the assembler
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1563 and linker to do the heavy lifting while not preventing a particular source
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1564 module from defining a local symbol of the same name as an external symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1565 if it does not need the external symbol. (This pragma will not cause an
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1566 automatic external definition if there is already a locally defined symbol.)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1567 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1568 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1569 This pragma will often be specified on the command line for large projects.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1570 However, depending on the specific dynamics of the project, it may be sufficient
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1571 for one or two files to use this pragma internally.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1572 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1573 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1574 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1575
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1576 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1577 <term>dollarlocal</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1578 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1579
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1580 <para>When set, a "$" in a symbol makes it local. When not set, "$" does not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1581 cause a symbol to be local. It is set by default except when using the OS9
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1582 target.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1583
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1584 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1585 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1586
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1587 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1588 <term>dollarnotlocal</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1589 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1590
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1591 <para> This is the same as the "dollarlocal" pragma except its sense is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1592 reversed. That is, "dollarlocal" and "nodollarnotlocal" are equivalent and
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1593 "nodollarlocal" and "dollarnotlocal" are equivalent. </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1594
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1595 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1596 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1597
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1598 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1599 <term>pcaspcr</term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1600 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1601
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1602 <para> Normally, LWASM makes a distinction between PC and PCR in program
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1603 counter relative addressing. In particular, the use of PC means an absolute
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1604 offset from PC while PCR causes the assembler to calculate the offset to the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1605 specified operand and use that as the offset from PC. By setting this
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1606 pragma, you can have PC treated the same as PCR. </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1607
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1608
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1609 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1610 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1611
60
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1612 <varlistentry>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1613 <term>shadow</term>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1614 <listitem>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1615
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1616 <para>When this pragma is in effect, it becomes possible to define a macro
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1617 that matches an internal operation code. Thus, it makes it possible to
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1618 redefine either CPU instructions or pseudo operations. Because this feature
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1619 is of dubious utility, it is disabled by default.</para>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1620
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1621 </listitem>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1622 </varlistentry>
9ded7e6fc1b0 Updated documentation to include recently added features
lost@l-w.ca
parents: 51
diff changeset
1623
111
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1624 <varlistentry>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1625 <term>nolist</term>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1626 <listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1627
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
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parents: 68
diff changeset
1628 <para>Lines where this pragma is in effect will not appear in the assembly
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1629 listing. Also, any symbols defined under this pragma will not show up in
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
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parents: 68
diff changeset
1630 the symbol list. This is most useful in include files to avoid spamming the
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1631 assembly listing with dozens, hundreds, or thousands of irrelevant
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1632 symbols.</para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1633
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1634 </listitem>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1635 </varlistentry>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1636
117
8e2523061ce9 Document the new autobranchlength pragma
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parents: 111
diff changeset
1637 <varlistentry>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1638 <term>autobranchlength</term>
8e2523061ce9 Document the new autobranchlength pragma
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parents: 111
diff changeset
1639 <listitem>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1640
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1641 <para>One of the perennial annoyances for 6809 programmers is that the
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1642 mneumonics for the short and long branch instructions are different (bxx vs.
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1643 lbxx), which is at odds with the rest of the instruction set. This pragma
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1644 is a solution to those annoying byte overflow errors that short branch
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1645 instructions tend to aquire.</para>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1646
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1647 <para>When this pragma is in effect, which is not the default, whenever any
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1648 relative branch instruction is used, its size will be automatically
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1649 determined based on the actual distance to the destination. In other words,
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1650 one can write code with long or short branches everywhere and the assembler
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1651 will choose a size for the branch.</para>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1652
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1653 <para>Also, while this pragma is in effect, the > and < symbols can be used
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1654 to force the branch size, analogous to their use for other instructions with
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1655 < forcing 8 bit offsets and > forcing 16 bit offets.</para>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1656
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1657 <para>Because this pragma leads to source that is incompatible with other
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1658 assemblers, it is strongly recommended that it be invoked using the PRAGMA
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1659 directive within the source code rather than on the command line or via the
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1660 *PRAGMA directive. This way, an error will be raised if someone tries to
207
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1661 assemble the code under a different assembler.</para>
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1662
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1663 <varlistentry>
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1664 <term>nosymbolcase</term>
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1665 <term>symbolnocase</term>
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1666 <listitem>
117
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1667
207
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1668 <para>Any symbol defined while this pragma is in force will be treated as
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1669 case insensitive, regardless whether the pragma is in force when the symbol
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1670 is referenced.</para>
117
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1671
207
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1672 <para>It is important to note that this pragma will not work as expected in
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1673 all cases when using the object file assembly target. It is intended for
07e1fac76321 Added pragma to allow non case sensitive symbols
William Astle <lost@l-w.ca>
parents: 168
diff changeset
1674 use only when the assembler will be producing the final binary.</para>
117
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1675
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1676 </listitem>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1677 </varlistentry>
8e2523061ce9 Document the new autobranchlength pragma
lost@l-w.ca
parents: 111
diff changeset
1678
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1679 </variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1680
111
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1681 <para>As a convenience, each input file has a pragma state stack. This
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1682 allows, through the use of *PRAGMAPUSH and *PRAGMAPOP, a file to change a
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1683 pragma state and then restore it to the precise state it had previously.
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1684 If, at the end of an input file, all pragma states have not been popped,
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1685 they will be removed from the stack. Thus, it is critical to employ
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1686 *PRAGMAPOP correctly. Because each input file has its own pragma stack,
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1687 using *PRAGMAPUSH in one file and *PRAGMAPOP in another file will not
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1688 work.</para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1689
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1690 <para>Pragma stacks are more useful in include files, in particular in
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1691 conjunction with the nolist pragma. One can push the state of the nolist
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1692 pragma, engage the nolist pragma, and then pop the state of the nolist
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1693 pragma at the end of the include file. This will cause the entire include
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1694 file to operate under the nolist pragma. However, if the file is included
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1695 while nolist is already engaged, it will not undo that state.</para>
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1696
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1697
c0aedb1584af Updated manual to describe nolist pragma and pragma stacks
lost@l-w.ca
parents: 68
diff changeset
1698
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1699 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1700
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1701 </chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1702
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1703 <chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1704 <title>LWLINK</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1705 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1706 The LWTOOLS linker is called LWLINK. This chapter documents the various features
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1707 of the linker.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1708 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1709
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1710 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1711 <title>Command Line Options</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1712 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1713 The binary for LWLINK is called "lwlink". Note that the binary is in lower
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1714 case. lwlink takes the following command line arguments.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1715 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1716 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1717 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1718 <term><option>--decb</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1719 <term><option>-b</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1720 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1721 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1722 Selects the DECB output format target. This is equivalent to <option>--format=decb</option>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1723 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1724 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1725 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1726
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1727 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1728 <term><option>--output=FILE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1729 <term><option>-o FILE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1730 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1731 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1732 This option specifies the name of the output file. If not specified, the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1733 default is <option>a.out</option>.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1734 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1735 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1736 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1737
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1738 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1739 <term><option>--format=TYPE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1740 <term><option>-f TYPE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1741 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1742 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1743 This option specifies the output format. Valid values are <option>decb</option>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1744 and <option>raw</option>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1745 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1746 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1747 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1748
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1749 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1750 <term><option>--raw</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1751 <term><option>-r</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1752 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1753 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1754 This option specifies the raw output format.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1755 It is equivalent to <option>--format=raw</option>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1756 and <option>-f raw</option>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1757 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1758 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1759 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1760
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1761 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1762 <term><option>--script=FILE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1763 <term><option>-s</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1764 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1765 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1766 This option allows specifying a linking script to override the linker's
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1767 built in defaults.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1768 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1769 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1770 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1771
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1772 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1773 <term><option>--section-base=SECT=BASE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1774 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1775 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1776 Cause section SECT to load at base address BASE. This will be prepended
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1777 to the built-in link script. It is ignored if a link script is provided.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1778 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1779 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1780 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1781
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1782 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1783 <term><option>--map=FILE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1784 <term><option>-m FILE</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1785 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1786 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1787 This will output a description of the link result to FILE.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1788 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1789 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1790 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1791
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1792 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1793 <term><option>--library=LIBSPEC</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1794 <term><option>-l LIBSPEC</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1795 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1796 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1797 Load a library using the library search path. LIBSPEC will have "lib" prepended
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1798 and ".a" appended.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1799 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1800 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1801 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1802
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1803 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1804 <term><option>--library-path=DIR</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1805 <term><option>-L DIR</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1806 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1807 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1808 Add DIR to the library search path.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1809 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1810 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1811 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1812
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1813 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1814 <term><option>--debug</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1815 <term><option>-d</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1816 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1817 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1818 This option increases the debugging level. It is only useful for LWTOOLS
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1819 developers.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1820 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1821 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1822 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1823
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1824 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1825 <term><option>--help</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1826 <term><option>-?</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1827 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1828 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1829 This provides a listing of command line options and a brief description
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1830 of each.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1831 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1832 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1833 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1834
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1835 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1836 <term><option>--usage</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1837 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1838 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1839 This will display a usage summary
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1840 of each command line option.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1841 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1842 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1843 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1844
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1845
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1846 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1847 <term><option>--version</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1848 <term><option>-V</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1849 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1850 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1851 This will display the version of LWLINK.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1852 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1853 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1854 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1855
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1856 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1857
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1858 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1859 <title>Linker Operation</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1860
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1861 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1862
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1863 LWLINK takes one or more files in supported input formats and links them
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1864 into a single binary. Currently supported formats are the LWTOOLS object
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1865 file format and the archive format used by LWAR. While the precise method is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1866 slightly different, linking can be conceptualized as the following steps.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1867
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1868 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1869
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1870 <orderedlist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1871 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1872 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1873 First, the linker loads a linking script. If no script is specified, it
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1874 loads a built-in default script based on the output format selected. This
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1875 script tells the linker how to lay out the various sections in the final
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1876 binary.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1877 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1878 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1879
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1880 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1881 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1882 Next, the linker reads all the input files into memory. At this time, it
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1883 flags any format errors in those files. It constructs a table of symbols
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1884 for each object at this time.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1885 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1886 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1887
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1888 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1889 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1890 The linker then proceeds with organizing the sections loaded from each file
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1891 according to the linking script. As it does so, it is able to assign addresses
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1892 to each symbol defined in each object file. At this time, the linker may
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1893 also collapse different instances of the same section name into a single
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1894 section by appending the data from each subsequent instance of the section
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1895 to the first instance of the section.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1896 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1897 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1898
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1899 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1900 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1901 Next, the linker looks through every object file for every incomplete reference.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1902 It then attempts to fully resolve that reference. If it cannot do so, it
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1903 throws an error. Once a reference is resolved, the value is placed into
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1904 the binary code at the specified section. It should be noted that an
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1905 incomplete reference can reference either a symbol internal to the object
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1906 file or an external symbol which is in the export list of another object
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
1907 file.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1908 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1909 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1910
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1911 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1912 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1913 If all of the above steps are successful, the linker opens the output file
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1914 and actually constructs the binary.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1915 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1916 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1917 </orderedlist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1918
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1919 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1920
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1921 <section
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1922 <title>Linking Scripts</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1923 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1924 A linker script is used to instruct the linker about how to assemble the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1925 various sections into a completed binary. It consists of a series of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1926 directives which are considered in the order they are encountered.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1927 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1928 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1929 The sections will appear in the resulting binary in the order they are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1930 specified in the script file. If a referenced section is not found, the linker will behave as though the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1931 section did exist but had a zero size, no relocations, and no exports.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1932 A section should only be referenced once. Any subsequent references will have
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1933 an undefined effect.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1934 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1935
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1936 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1937 All numbers are in linking scripts are specified in hexadecimal. All directives
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1938 are case sensitive although the hexadecimal numbers are not.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1939 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1940
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1941 <para>A section name can be specified as a "*", then any section not
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1942 already matched by the script will be matched. The "*" can be followed
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1943 by a comma and a flag to narrow the section down slightly, also.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1944 If the flag is "!bss", then any section that is not flagged as a bss section
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1945 will be matched. If the flag is "bss", then any section that is flagged as
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1946 bss will be matched.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1947 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1948
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1949 <para>The following directives are understood in a linker script.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1950 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1951 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1952 <term>section <parameter>name</parameter> load <parameter>addr</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1953 <listitem><para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1954
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1955 This causes the section <parameter>name</parameter> to load at
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1956 <parameter>addr</parameter>. For the raw target, only one "load at" entry is
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1957 allowed for non-bss sections and it must be the first one. For raw targets,
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1958 it affects the addresses the linker assigns to symbols but has no other
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1959 affect on the output. bss sections may all have separate load addresses but
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1960 since they will not appear in the binary anyway, this is okay.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1961 </para><para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1962 For the decb target, each "load" entry will cause a new "block" to be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1963 output to the binary which will contain the load address. It is legal for
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1964 sections to overlap in this manner - the linker assumes the loader will sort
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1965 everything out.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1966 </para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1967 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1968
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1969 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1970 <term>section <parameter>name</parameter></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1971 <listitem><para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1972
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1973 This will cause the section <parameter>name</parameter> to load after the previously listed
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1974 section.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1975 </para></listitem></varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1976 <varlistentry>
68
99ce348b0e6b Fixed error in documentation - linkscripts use "entry" instead of "exec"
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diff changeset
1977 <term>entry <parameter>addr or sym</parameter></term>
0
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1978 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1979 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1980 This will cause the execution address (entry point) to be the address
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1981 specified (in hex) or the specified symbol name. The symbol name must
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1982 match a symbol that is exported by one of the object files being linked.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1983 This has no effect for targets that do not encode the entry point into the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1984 resulting file. If not specified, the entry point is assumed to be address 0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1985 which is probably not what you want. The default link scripts for targets
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1986 that support this directive automatically starts at the beginning of the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1987 first section (usually "init" or "code") that is emitted in the binary.
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1988 </para>
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1989 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1990 </varlistentry>
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diff changeset
1991
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1992 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1993 <term>pad <parameter>size</parameter></term>
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1994 <listitem><para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1995 This will cause the output file to be padded with NUL bytes to be exactly
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
1996 <parameter>size</parameter> bytes in length. This only makes sense for a raw target.
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1997 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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1998 </listitem>
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1999 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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2000 </variablelist>
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2001
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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2002
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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2003
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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2004 </section>
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2005
152
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2006 <section>
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2007 <title>Format Specific Linking Notes</title>
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diff changeset
2008
a26b045c4e18 Added documentation about OS9 module support in lwlink
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2009 <para>Some formats require special information to be able to generate actual
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2010 binaries. If the specific format you are interested in is not listed in
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2011 this section, then there is nothing special you need to know about to create
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2012 a final binary.</para>
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diff changeset
2013
a26b045c4e18 Added documentation about OS9 module support in lwlink
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2014 <section>
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diff changeset
2015 <title>OS9 Modules</title>
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diff changeset
2016
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diff changeset
2017 <para>OS9 modules need to embed several items into the module header. These
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2018 items are the type of module, the langauge of the module, the module
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diff changeset
2019 attributes, the module revision number, the data size (bss), and the
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diff changeset
2020 execution offset. These are all either calculated or default to reasonable
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2021 values.</para>
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2022
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2023 <para>The data size is calcuated as the sum of all sections named "bss" or
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diff changeset
2024 ".bss" in all object files that are linked together.</para>
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diff changeset
2025
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diff changeset
2026 <para>The execution offset is calculated from the address of the special
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2027 symbol "__start" which must be an exported (external) symbol in one of the
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diff changeset
2028 objects to be linked.</para>
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diff changeset
2029
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2030 <para>The type defaults to "Prgrm" or "Program module". The language
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diff changeset
2031 defaults to "Objct" or "6809 object code". Attributes default to enabling
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2032 the re-entrant flag. And finally, the revision defaults to zero.</para>
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diff changeset
2033
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2034 <para>The embedded module name is the output filename. If the output
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2035 filename includes more than just the filename, this will probably not be
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2036 what you want.</para>
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diff changeset
2037
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diff changeset
2038 <para>The type, language, attributes, revision, and module name can all be
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2039 overridden by providing a special section in exactly one of the object files
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diff changeset
2040 to be linked. This section is called "__os9" (note the two underscores).
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diff changeset
2041 To override the type, language, attributes, or revision values, define a
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diff changeset
2042 non-exported symbol in this section called "type", "lang", "attr", or "rev"
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2043 respectively. Any other symbols defined are ignored. To override the
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2044 module name, include as the only actual code in the section a NUL terminated
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2045 string (the FCN directive is useful for this). If there is no code in the
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diff changeset
2046 section or it beings with a NUL, the default name will be used. Any of the
a26b045c4e18 Added documentation about OS9 module support in lwlink
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diff changeset
2047 preceeding that are not defined in the special section will retain their
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2048 default values.</para>
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2049
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2050 <para>The built-in link script for OS9 modules will place the following
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2051 sections, in order, in the module: "code", ".text", "data", ".data". It
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2052 will merge all sections with the name "bss" or ".bss" into the "data"
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2053 section. All other section names are ignored. What this means is that you
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2054 must define your data variables in the a section called "bss" or ".bss" even
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2055 though you will be refencing them all as offsets from U. This does have the
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2056 unpleasant side effect that all BSS references will end up being 16 bit
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2057 offsets because the assembler cannot know what the offset will be once the
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2058 linker is finished its work. Thus, if the tightest possible code is
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2059 required, having LWASM directly output the module is a better choice.</para>
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2060
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2061 <para>While the built-in link script is probably sufficient for most
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2062 purposes, you can provide your own script. If you provide a custom link
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2063 script, you must start your code and data sections at location 000D to
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2064 accommodate the module header. Otherwise, you will have an incorrect
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2065 location for the execution offset. You must use the ENTRY directive in the
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2066 script to define the entry point for the module.</para>
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2067
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2068 <para>It should also be obvious from the above that you cannot mix the bss
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2069 (rmb) definitions with the module code when linking separately. Those
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2070 familiar with typical module creation will probably find this an unpleasant
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2071 difference but it is unavoidable.</para>
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2072
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2073 <para>It should also be noted that direct page references should also be
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2074 avoided because you cannot know ahead of time whether the linker is going to
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2075 end up putting a particular variable in the first 256 bytes of the module's
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2076 data space. If, however, you know for certain you will have less than 256
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2077 bytes of defined data space across all of the object files that will be
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2078 linked, you can instead use forced DP addressing for your data addresses
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2079 instead of the ,u notation. When linking with 3rd party libraries, this
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2080 practice should be avoided. Also, when creating libraries, always use the
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2081 offset from U technique.</para>
a26b045c4e18 Added documentation about OS9 module support in lwlink
lost@l-w.ca
parents: 143
diff changeset
2082
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2083 </section>
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2084
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2085 </section>
a26b045c4e18 Added documentation about OS9 module support in lwlink
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parents: 143
diff changeset
2086
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff changeset
2087 </chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2088
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2089 <chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2090 <title>Libraries and LWAR</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2091
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2092 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2093 LWTOOLS also includes a tool for managing libraries. These are analogous to
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2094 the static libraries created with the "ar" tool on POSIX systems. Each library
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2095 file contains one or more object files. The linker will treat the object
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2096 files within a library as though they had been specified individually on
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2097 the command line except when resolving external references. External references
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2098 are looked up first within the object files within the library and then, if
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2099 not found, the usual lookup based on the order the files are specified on
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2100 the command line occurs.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2101 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2102
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2103 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2104 The tool for creating these libary files is called LWAR.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2105 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2106
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2107 <section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2108 <title>Command Line Options</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2109 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2110 The binary for LWAR is called "lwar". Note that the binary is in lower
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2111 case. The options lwar understands are listed below. For archive manipulation
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2112 options, the first non-option argument is the name of the archive. All other
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2113 non-option arguments are the names of files to operate on.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2114 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2115
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2116 <variablelist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2117 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2118 <term><option>--add</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2119 <term><option>-a</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2120 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2121 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2122 This option specifies that an archive is going to have files added to it.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2123 If the archive does not already exist, it is created. New files are added
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2124 to the end of the archive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2125 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2126 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2127 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2128
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2129 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2130 <term><option>--create</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2131 <term><option>-c</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2132 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2133 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2134 This option specifies that an archive is going to be created and have files
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2135 added to it. If the archive already exists, it is truncated.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2136 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2137 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2138 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2139
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2140 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2141 <term><option>--merge</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2142 <term><option>-m</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2143 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2144 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2145 If specified, any files specified to be added to an archive will be checked
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2146 to see if they are archives themselves. If so, their constituent members are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2147 added to the archive. This is useful for avoiding archives containing archives.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2148 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2149 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2150 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2151
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2152 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2153 <term><option>--list</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2154 <term><option>-l</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2155 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2156 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2157 This will display a list of the files contained in the archive.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2158 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2159 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2160 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2161
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2162 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2163 <term><option>--debug</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2164 <term><option>-d</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2165 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2166 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2167 This option increases the debugging level. It is only useful for LWTOOLS
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2168 developers.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2169 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2170 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2171 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2172
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2173 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2174 <term><option>--help</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2175 <term><option>-?</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2176 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2177 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2178 This provides a listing of command line options and a brief description
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2179 of each.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2180 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2181 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2182 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2183
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2184 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2185 <term><option>--usage</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2186 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2187 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2188 This will display a usage summary
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2189 of each command line option.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2190 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2191 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2192 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2193
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2194
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2195 <varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2196 <term><option>--version</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2197 <term><option>-V</option></term>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2198 <listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2199 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2200 This will display the version of LWLINK.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2201 of each.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2202 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2203 </listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2204 </varlistentry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2205
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2206 </section>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2207
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2208 </chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2209
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2210 <chapter id="objchap">
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2211 <title>Object Files</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2212 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2213 LWTOOLS uses a proprietary object file format. It is proprietary in the sense
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2214 that it is specific to LWTOOLS, not that it is a hidden format. It would be
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2215 hard to keep it hidden in an open source tool chain anyway. This chapter
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2216 documents the object file format.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2217 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2218
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2219 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2220 An object file consists of a series of sections each of which contains a
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2221 list of exported symbols, a list of incomplete references, and a list of
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2222 "local" symbols which may be used in calculating incomplete references. Each
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2223 section will obviously also contain the object code.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2224 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2225
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2226 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2227 Exported symbols must be completely resolved to an address within the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2228 section it is exported from. That is, an exported symbol must be a constant
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2229 rather than defined in terms of other symbols.</para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2230
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2231 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2232 Each object file starts with a magic number and version number. The magic
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2233 number is the string "LWOBJ16" for this 16 bit object file format. The only
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2234 defined version number is currently 0. Thus, the first 8 bytes of the object
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2235 file are <code>4C574F424A313600</code>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2236 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2237
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2238 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2239 Each section has the following items in order:
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2240 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2241
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2242 <itemizedlist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2243 <listitem><para>section name</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2244 <listitem><para>flags</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2245 <listitem><para>list of local symbols (and addresses within the section)</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2246 <listitem><para>list of exported symbols (and addresses within the section)</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2247 <listitem><para>list of incomplete references along with the expressions to calculate them</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2248 <listitem><para>the actual object code (for non-BSS sections)</para></listitem>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2249 </itemizedlist>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2250
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2251 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2252 The section starts with the name of the section with a NUL termination
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2253 followed by a series of flag bytes terminated by NUL. There are only two
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2254 flag bytes defined. A NUL (0) indicates no more flags and a value of 1
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2255 indicates the section is a BSS section. For a BSS section, no actual
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2256 code is included in the object file.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2257 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2258
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2259 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2260 Either a NULL section name or end of file indicate the presence of no more
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2261 sections.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2262 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2263
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2264 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2265 Each entry in the exported and local symbols table consists of the symbol
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2266 (NUL terminated) followed by two bytes which contain the value in big endian
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2267 order. The end of a symbol table is indicated by a NULL symbol name.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2268 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2269
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2270 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2271 Each entry in the incomplete references table consists of an expression
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2272 followed by a 16 bit offset where the reference goes. Expressions are
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2273 defined as a series of terms up to an "end of expression" term. Each term
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2274 consists of a single byte which identifies the type of term (see below)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2275 followed by any data required by the term. Then end of the list is flagged
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2276 by a NULL expression (only an end of expression term).
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2277 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2278
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2279 <table frame="all"><title>Object File Term Types</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2280 <tgroup cols="2">
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2281 <thead>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2282 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2283 <entry>TERMTYPE</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2284 <entry>Meaning</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2285 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2286 </thead>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2287 <tbody>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2288 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2289 <entry>00</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2290 <entry>end of expression</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2291 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2292
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2293 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2294 <entry>01</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2295 <entry>integer (16 bit in big endian order follows)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2296 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2297 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2298 <entry>02</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2299 <entry> external symbol reference (NUL terminated symbol name follows)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2300 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2301
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2302 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2303 <entry>03</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2304 <entry>local symbol reference (NUL terminated symbol name follows)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2305 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2306
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2307 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2308 <entry>04</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2309 <entry>operator (1 byte operator number)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2310 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2311 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2312 <entry>05</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2313 <entry>section base address reference</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2314 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2315
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2316 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2317 <entry>FF</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2318 <entry>This term will set flags for the expression. Each one of these terms will set a single flag. All of them should be specified first in an expression. If they are not, the behaviour is undefined. The byte following is the flag. Flag 01 indicates an 8 bit relocation. Flag 02 indicates a zero-width relocation (see the EXTDEP pseudo op in LWASM).</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2319 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2320 </tbody>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2321 </tgroup>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2322 </table>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2323
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2324
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2325 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2326 External references are resolved using other object files while local
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2327 references are resolved using the local symbol table(s) from this file. This
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2328 allows local symbols that are not exported to have the same names as
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2329 exported symbols or external references.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2330 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2331
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2332 <table frame="all"><title>Object File Operator Numbers</title>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2333 <tgroup cols="2">
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2334 <thead>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2335 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2336 <entry>Number</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2337 <entry>Operator</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2338 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2339 </thead>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2340 <tbody>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2341 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2342 <entry>01</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2343 <entry>addition (+)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2344 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2345 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2346 <entry>02</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2347 <entry>subtraction (-)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2348 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2349 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2350 <entry>03</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2351 <entry>multiplication (*)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2352 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2353 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2354 <entry>04</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2355 <entry>division (/)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2356 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2357 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2358 <entry>05</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2359 <entry>modulus (%)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2360 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2361 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2362 <entry>06</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2363 <entry>integer division (\) (same as division)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2364 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2365
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2366 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2367 <entry>07</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2368 <entry>bitwise and</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2369 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2370
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2371 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2372 <entry>08</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2373 <entry>bitwise or</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2374 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2375
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2376 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2377 <entry>09</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2378 <entry>bitwise xor</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2379 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2380
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2381 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2382 <entry>0A</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2383 <entry>boolean and</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2384 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2385
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2386 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2387 <entry>0B</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2388 <entry>boolean or</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2389 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2390
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2391 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2392 <entry>0C</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2393 <entry>unary negation, 2's complement (-)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2394 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2395
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2396 <row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2397 <entry>0D</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2398 <entry>unary 1's complement (^)</entry>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2399 </row>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2400 </tbody>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2401 </tgroup>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2402 </table>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2403
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2404 <para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2405 An expression is represented in a postfix manner with both operands for
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2406 binary operators preceding the operator and the single operand for unary
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2407 operators preceding the operator.
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2408 </para>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2409
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2410 </chapter>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2411 </book>
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
2412