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annotate lwlink/lwlink.h @ 389:2d9b7ae6c329

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Throw error if address overflows in extended mode This may or may not cause extra problems due to sloppiness in dealing with calculations that overflow in 16 bits. However, presumably it is a good idea so unless something major pops up, it seems like a good idea. Thanks to Erik G <erik@6809.org> for the patch.
author William Astle <lost@l-w.ca>
date Mon, 13 Jul 2015 21:37:49 -0600
parents 221b5f58d8ad
children 1744f2d1a821
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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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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
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32 #define OUTPUT_OS9 3 // OS9 object code module
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33 #define OUTPUT_SREC 4 // motorola SREC format
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34
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35 typedef struct symtab_s symtab_t;
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36 struct symtab_s
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37 {
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38 unsigned char *sym; // symbol name
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39 int offset; // local offset
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40 // int realval; // resolved value
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41 symtab_t *next; // next symbol
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42 };
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43
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44 #define RELOC_NORM 0 // all default (16 bit)
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45 #define RELOC_8BIT 1 // only use the low 8 bits for the reloc
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46 typedef struct reloc_s reloc_t;
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47 struct reloc_s
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48 {
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49 int offset; // where in the section
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50 int flags; // flags for the relocation
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51 lw_expr_stack_t *expr; // the expression to calculate it
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52 reloc_t *next; // ptr to next relocation
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53 };
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54
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55 typedef struct fileinfo_s fileinfo_t;
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56
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57 #define SECTION_BSS 1
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58 #define SECTION_CONST 2
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59 typedef struct
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60 {
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61 unsigned char *name; // name of the section
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62 int flags; // section flags
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63 int codesize; // size of the code
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64 unsigned char *code; // pointer to the code
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65 int loadaddress; // the actual load address of the section
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66 int processed; // was the section processed yet?
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67
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68 symtab_t *localsyms; // local symbol table
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69 symtab_t *exportedsyms; // exported symbols table
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70
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71 reloc_t *incompletes; // table of incomplete references
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72
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73 fileinfo_t *file; // the file we are in
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74
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75 int aftersize; // add this many bytes after section on output
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76 unsigned char *afterbytes; // add these bytes after section on output
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77 } section_t;
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78
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79 struct fileinfo_s
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80 {
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81 char *filename;
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82 unsigned char *filedata;
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83 int filesize;
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84 section_t *sections;
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85 int nsections;
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86 int islib; // set to true if the file is a "-l" option
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87
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88 int forced; // set to true if the file is a "forced" include
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89
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90 // "sub" files (like in archives or libraries)
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91 int nsubs;
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92 fileinfo_t **subs;
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93 fileinfo_t *parent;
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94 };
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95
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96 struct section_list
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97 {
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98 section_t *ptr; // ptr to section structure
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99 int forceaddr; // was this force to an address by the link script?
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100 };
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101
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102
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103 typedef struct sectopt_s sectopt_t;
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104 struct sectopt_s
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105 {
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106 char *name; // section name
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107 int aftersize; // number of bytes to append to section
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108 unsigned char *afterbytes; // the bytes to store after the section
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109 sectopt_t *next; // next section option
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110 };
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111
0
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112 #ifndef __link_c_seen__
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113 extern struct section_list *sectlist;
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114 extern int nsects;
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115 extern sectopt_t *section_opts;
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116 #endif
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118
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119 #ifndef __lwlink_c_seen__
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120
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121 extern int debug_level;
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122 extern int outformat;
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123 extern char *outfile;
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124 extern int ninputfiles;
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125 extern fileinfo_t **inputfiles;
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126 extern char *scriptfile;
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127 extern char *entrysym;
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128
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129 extern int nlibdirs;
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130 extern char **libdirs;
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131
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132 extern int nscriptls;
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133 extern char **scriptls;
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134
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135 extern int symerr;
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136
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137 extern char *map_file;
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138
179
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139 extern char *sysroot;
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140
0
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141 #define __lwlink_E__ extern
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142 #else
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143 #define __lwlink_E__
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144 #endif // __lwlink_c_seen__
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145
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146 __lwlink_E__ void add_input_file(char *fn);
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147 __lwlink_E__ void add_input_library(char *fn);
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148 __lwlink_E__ void add_library_search(char *fn);
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149 __lwlink_E__ void add_section_base(char *fn);
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150 __lwlink_E__ char *sanitize_symbol(char *sym);
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151
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152 #undef __lwlink_E__
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153
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154 struct scriptline_s
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155 {
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156 char *sectname; // name of section, NULL for wildcard
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157 int loadat; // address to load at (or -1)
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158 int noflags; // flags to NOT have
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159 int yesflags; // flags to HAVE
315
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160 int growsdown; // sections are placed descending in memory
0
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161 };
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162
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163 typedef struct
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164 {
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165 int nlines; // number of lines in the script
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166 struct scriptline_s *lines; // the parsed script lines (section)
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167 int padsize; // the size to pad to, -1 for none
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168 char *execsym; // entry point symbol
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169 int execaddr; // execution address (entry point)
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170 int stacksize; // stack size
148
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171 int modtype; // module type
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172 int modlang; // module language
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173 int modattr; // module attributes
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174 int modrev; // module revision
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175 int edition; // module edition
148
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176 char *name; // module name
234
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177 char *basesympat; // pattern for section base symbol (%s for section name)
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178 char *lensympat; // pattern for section length symbol (%s for section name)
0
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179 } linkscript_t;
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180
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181 #ifndef __script_c_seen__
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182 extern linkscript_t linkscript;
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183 #endif
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184
234
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185 typedef struct symlist_s symlist_t;
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186
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187 struct symlist_s
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188 {
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189 char *sym;
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190 int val;
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191 symlist_t *next;
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192
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193 };
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194
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195 extern symlist_t *symlist;
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196
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197 #endif //__lwlink_h_seen__