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annotate lwlink/lwlink.h @ 234:d389adbcc4ab
Added section base and length symbols to lwlink
Added the ability for a link script to define section base and section
length symbols when linking. These symbols are searched for when an external
reference is resolved before looking up any symbols in the various objects
being linked. Also documented the new link script directives and added such
directives to all default link scripts.
author | William Astle <lost@l-w.ca> |
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date | Fri, 10 Aug 2012 23:47:56 -0600 |
parents | c6a38fd8bd33 |
children | ce1fdc8d6568 |
rev | line source |
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0
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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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22 |
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23 |
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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 |
148 | 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 } section_t; |
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74 |
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75 struct fileinfo_s |
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76 { |
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77 char *filename; |
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78 unsigned char *filedata; |
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79 long filesize; |
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80 section_t *sections; |
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81 int nsections; |
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82 int islib; // set to true if the file is a "-l" option |
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83 |
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84 int forced; // set to true if the file is a "forced" include |
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85 |
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86 // "sub" files (like in archives or libraries) |
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87 int nsubs; |
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88 fileinfo_t **subs; |
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89 fileinfo_t *parent; |
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90 }; |
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91 |
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92 struct section_list |
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93 { |
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94 section_t *ptr; // ptr to section structure |
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95 int forceaddr; // was this force to an address by the link script? |
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96 }; |
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97 |
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98 #ifndef __link_c_seen__ |
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99 extern struct section_list *sectlist; |
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100 extern int nsects; |
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101 #endif |
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102 |
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103 |
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104 #ifndef __lwlink_c_seen__ |
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105 |
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106 extern int debug_level; |
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107 extern int outformat; |
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108 extern char *outfile; |
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109 extern int ninputfiles; |
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110 extern fileinfo_t **inputfiles; |
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111 extern char *scriptfile; |
183 | 112 extern char *entrysym; |
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113 |
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114 extern int nlibdirs; |
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115 extern char **libdirs; |
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116 |
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117 extern int nscriptls; |
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118 extern char **scriptls; |
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119 |
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120 extern int symerr; |
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121 |
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122 extern char *map_file; |
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123 |
179
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124 extern char *sysroot; |
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125 |
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126 #define __lwlink_E__ extern |
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127 #else |
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128 #define __lwlink_E__ |
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129 #endif // __lwlink_c_seen__ |
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130 |
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131 __lwlink_E__ void add_input_file(char *fn); |
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132 __lwlink_E__ void add_input_library(char *fn); |
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133 __lwlink_E__ void add_library_search(char *fn); |
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134 __lwlink_E__ void add_section_base(char *fn); |
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135 __lwlink_E__ char *sanitize_symbol(char *sym); |
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136 |
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137 #undef __lwlink_E__ |
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138 |
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139 struct scriptline_s |
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140 { |
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141 char *sectname; // name of section, NULL for wildcard |
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142 int loadat; // address to load at (or -1) |
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143 int noflags; // flags to NOT have |
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144 int yesflags; // flags to HAVE |
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145 }; |
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146 |
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147 typedef struct |
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148 { |
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149 int nlines; // number of lines in the script |
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150 struct scriptline_s *lines; // the parsed script lines (section) |
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151 int padsize; // the size to pad to, -1 for none |
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152 char *execsym; // entry point symbol |
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153 int execaddr; // execution address (entry point) |
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154 int stacksize; // stack size |
148 | 155 int modtype; // module type |
156 int modlang; // module language | |
157 int modattr; // module attributes | |
158 int modrev; // module revision | |
159 char *name; // module name | |
234
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160 char *basesympat; // pattern for section base symbol (%s for section name) |
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161 char *lensympat; // pattern for section length symbol (%s for section name) |
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162 } linkscript_t; |
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163 |
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164 #ifndef __script_c_seen__ |
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165 extern linkscript_t linkscript; |
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166 #endif |
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167 |
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168 typedef struct symlist_s symlist_t; |
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169 |
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170 struct symlist_s |
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171 { |
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172 char *sym; |
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173 int val; |
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174 symlist_t *next; |
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175 |
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176 }; |
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177 |
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178 extern symlist_t *symlist; |
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179 |
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180 #endif //__lwlink_h_seen__ |