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annotate lwlink/lwlink.h @ 241:d0e9dbe9afbe

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Add new heuristic for resolving instruction sizes. Add new heuristic for resolving instruction sizes. This applies to the the decision between extended and base page addressing by calculating the range of possible addresses (if reasonably knowable) and deciding on whether to force extended addressing based on that. (If the whole range is outside the direct page, extended addressing is required.)
author William Astle <lost@l-w.ca>
date Sun, 23 Sep 2012 13:06:43 -0600
parents ce1fdc8d6568
children 7de7b14ebaee
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1 /*
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2 lwlink.h
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWLINK.
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6
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7 LWLINK is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 Contains the main defs used by the linker
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21 */
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24 #ifndef __lwlink_h_seen__
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25 #define __lwlink_h_seen__
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26
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27 #include "expr.h"
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28
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29 #define OUTPUT_DECB 0 // DECB multirecord format
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30 #define OUTPUT_RAW 1 // raw sequence of bytes
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31 #define OUTPUT_LWEX0 2 // LWOS LWEX binary version 0
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32 #define OUTPUT_OS9 3 // OS9 object code module
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33
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34 typedef struct symtab_s symtab_t;
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35 struct symtab_s
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36 {
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37 unsigned char *sym; // symbol name
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38 int offset; // local offset
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39 // int realval; // resolved value
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40 symtab_t *next; // next symbol
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41 };
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42
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43 #define RELOC_NORM 0 // all default (16 bit)
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44 #define RELOC_8BIT 1 // only use the low 8 bits for the reloc
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45 typedef struct reloc_s reloc_t;
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46 struct reloc_s
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47 {
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48 int offset; // where in the section
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49 int flags; // flags for the relocation
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50 lw_expr_stack_t *expr; // the expression to calculate it
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51 reloc_t *next; // ptr to next relocation
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52 };
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53
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54 typedef struct fileinfo_s fileinfo_t;
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55
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56 #define SECTION_BSS 1
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57 #define SECTION_CONST 2
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58 typedef struct
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59 {
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60 unsigned char *name; // name of the section
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61 int flags; // section flags
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62 int codesize; // size of the code
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63 unsigned char *code; // pointer to the code
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64 int loadaddress; // the actual load address of the section
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65 int processed; // was the section processed yet?
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66
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67 symtab_t *localsyms; // local symbol table
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68 symtab_t *exportedsyms; // exported symbols table
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69
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70 reloc_t *incompletes; // table of incomplete references
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71
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72 fileinfo_t *file; // the file we are in
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73
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74 int aftersize; // add this many bytes after section on output
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75 unsigned char *afterbytes; // add these bytes after section on output
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76 } section_t;
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77
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78 struct fileinfo_s
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79 {
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80 char *filename;
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81 unsigned char *filedata;
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82 long filesize;
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83 section_t *sections;
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84 int nsections;
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85 int islib; // set to true if the file is a "-l" option
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86
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87 int forced; // set to true if the file is a "forced" include
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88
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89 // "sub" files (like in archives or libraries)
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90 int nsubs;
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91 fileinfo_t **subs;
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92 fileinfo_t *parent;
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93 };
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94
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95 struct section_list
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96 {
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97 section_t *ptr; // ptr to section structure
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98 int forceaddr; // was this force to an address by the link script?
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99 };
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100
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101
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102 typedef struct sectopt_s sectopt_t;
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103 struct sectopt_s
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104 {
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105 char *name; // section name
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106 int aftersize; // number of bytes to append to section
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107 unsigned char *afterbytes; // the bytes to store after the section
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108 sectopt_t *next; // next section option
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109 };
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110
0
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111 #ifndef __link_c_seen__
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112 extern struct section_list *sectlist;
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113 extern int nsects;
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114 extern sectopt_t *section_opts;
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115 #endif
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117
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118 #ifndef __lwlink_c_seen__
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119
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120 extern int debug_level;
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121 extern int outformat;
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122 extern char *outfile;
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123 extern int ninputfiles;
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124 extern fileinfo_t **inputfiles;
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125 extern char *scriptfile;
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126 extern char *entrysym;
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127
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128 extern int nlibdirs;
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129 extern char **libdirs;
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130
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131 extern int nscriptls;
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132 extern char **scriptls;
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133
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134 extern int symerr;
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135
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136 extern char *map_file;
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138 extern char *sysroot;
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139
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140 #define __lwlink_E__ extern
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141 #else
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142 #define __lwlink_E__
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143 #endif // __lwlink_c_seen__
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144
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145 __lwlink_E__ void add_input_file(char *fn);
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146 __lwlink_E__ void add_input_library(char *fn);
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147 __lwlink_E__ void add_library_search(char *fn);
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148 __lwlink_E__ void add_section_base(char *fn);
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149 __lwlink_E__ char *sanitize_symbol(char *sym);
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150
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151 #undef __lwlink_E__
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152
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153 struct scriptline_s
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154 {
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155 char *sectname; // name of section, NULL for wildcard
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156 int loadat; // address to load at (or -1)
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157 int noflags; // flags to NOT have
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158 int yesflags; // flags to HAVE
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159 };
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160
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161 typedef struct
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162 {
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163 int nlines; // number of lines in the script
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164 struct scriptline_s *lines; // the parsed script lines (section)
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165 int padsize; // the size to pad to, -1 for none
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166 char *execsym; // entry point symbol
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167 int execaddr; // execution address (entry point)
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168 int stacksize; // stack size
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169 int modtype; // module type
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170 int modlang; // module language
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171 int modattr; // module attributes
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172 int modrev; // module revision
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173 char *name; // module name
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174 char *basesympat; // pattern for section base symbol (%s for section name)
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175 char *lensympat; // pattern for section length symbol (%s for section name)
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176 } linkscript_t;
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177
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178 #ifndef __script_c_seen__
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179 extern linkscript_t linkscript;
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180 #endif
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181
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182 typedef struct symlist_s symlist_t;
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183
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184 struct symlist_s
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185 {
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186 char *sym;
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187 int val;
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188 symlist_t *next;
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189
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190 };
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191
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192 extern symlist_t *symlist;
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193
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194 #endif //__lwlink_h_seen__