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Guard against single operand multiplication when detecting like terms This *shouldn't* happen, but it apparently does in some pathological cases so guard against a single operand multiplication to prevent a crash.
author William Astle <lost@l-w.ca>
date Mon, 04 Nov 2024 23:48:23 -0700
parents cde1a5a48636
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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; BSS is just not included
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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 #define OUTPUT_RAW2 5 // raw sequence of bytes, BSS converted to NULs
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35 #define OUTPUT_IHEX 6 // IHEX output format
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36
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37 typedef struct symtab_s symtab_t;
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38 struct symtab_s
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39 {
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40 unsigned char *sym; // symbol name
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41 int offset; // local offset
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42 // int realval; // resolved value
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43 symtab_t *next; // next symbol
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44 };
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45
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46 #define RELOC_NORM 0 // all default (16 bit)
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47 #define RELOC_8BIT 1 // only use the low 8 bits for the reloc
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48 typedef struct reloc_s reloc_t;
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49 struct reloc_s
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50 {
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51 int offset; // where in the section
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52 int flags; // flags for the relocation
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53 lw_expr_stack_t *expr; // the expression to calculate it
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54 reloc_t *next; // ptr to next relocation
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55 };
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56
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57 typedef struct fileinfo_s fileinfo_t;
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58
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59 #define SECTION_BSS 1
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60 #define SECTION_CONST 2
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61 typedef struct
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62 {
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63 unsigned char *name; // name of the section
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64 int flags; // section flags
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65 int codesize; // size of the code
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66 unsigned char *code; // pointer to the code
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67 int loadaddress; // the actual load address of the section
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68 int processed; // was the section processed yet?
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69
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70 symtab_t *localsyms; // local symbol table
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71 symtab_t *exportedsyms; // exported symbols table
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72
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73 reloc_t *incompletes; // table of incomplete references
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74
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75 fileinfo_t *file; // the file we are in
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76
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77 int aftersize; // add this many bytes after section on output
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78 unsigned char *afterbytes; // add these bytes after section on output
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79 } section_t;
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80
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81 struct fileinfo_s
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82 {
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83 char *filename;
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84 unsigned char *filedata;
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85 int filesize;
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86 section_t *sections;
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87 int nsections;
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88 int islib; // set to true if the file is a "-l" option
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89
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90 int forced; // set to true if the file is a "forced" include
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91
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92 // "sub" files (like in archives or libraries)
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93 int nsubs;
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94 fileinfo_t **subs;
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95 fileinfo_t *parent;
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96 };
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97
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98 struct section_list
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99 {
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100 section_t *ptr; // ptr to section structure
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101 int forceaddr; // was this force to an address by the link script?
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102 };
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103
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104
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105 typedef struct sectopt_s sectopt_t;
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106 struct sectopt_s
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107 {
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108 char *name; // section name
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109 int aftersize; // number of bytes to append to section
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110 unsigned char *afterbytes; // the bytes to store after the section
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111 sectopt_t *next; // next section option
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112 };
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113
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114 #ifndef __link_c_seen__
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115 extern struct section_list *sectlist;
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116 extern int nsects;
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117 extern sectopt_t *section_opts;
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118 #endif
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120
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121 #ifndef __lwlink_c_seen__
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122
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123 extern int debug_level;
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124 extern int outformat;
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125 extern char *outfile;
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126 extern int ninputfiles;
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127 extern fileinfo_t **inputfiles;
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128 extern char *scriptfile;
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129 extern char *entrysym;
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131 extern int nlibdirs;
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132 extern char **libdirs;
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133
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134 extern int nscriptls;
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135 extern char **scriptls;
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136
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137 extern int symerr;
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138
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139 extern char *map_file;
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140
179
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141 extern char *sysroot;
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142
0
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143 #define __lwlink_E__ extern
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144 #else
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145 #define __lwlink_E__
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146 #endif // __lwlink_c_seen__
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147
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148 __lwlink_E__ void add_input_file(char *fn);
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149 __lwlink_E__ void add_input_library(char *fn);
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150 __lwlink_E__ void add_library_search(char *fn);
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151 __lwlink_E__ void add_section_base(char *fn);
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152 __lwlink_E__ char *sanitize_symbol(char *sym);
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153
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154 #undef __lwlink_E__
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155
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156 struct scriptline_s
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157 {
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158 char *sectname; // name of section, NULL for wildcard
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159 int loadat; // address to load at (or -1)
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160 int noflags; // flags to NOT have
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161 int yesflags; // flags to HAVE
315
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162 int growsdown; // sections are placed descending in memory
0
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163 };
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164
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165 typedef struct
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166 {
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167 int nlines; // number of lines in the script
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168 struct scriptline_s *lines; // the parsed script lines (section)
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169 int padsize; // the size to pad to, -1 for none
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170 char *execsym; // entry point symbol
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171 int execaddr; // execution address (entry point)
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172 int stacksize; // stack size
148
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173 int modtype; // module type
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174 int modlang; // module language
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175 int modattr; // module attributes
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176 int modrev; // module revision
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177 int edition; // module edition
148
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178 char *name; // module name
234
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179 char *basesympat; // pattern for section base symbol (%s for section name)
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180 char *lensympat; // pattern for section length symbol (%s for section name)
0
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181 } linkscript_t;
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182
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183 #ifndef __script_c_seen__
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184 extern linkscript_t linkscript;
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185 #endif
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186
234
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187 typedef struct symlist_s symlist_t;
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188
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189 struct symlist_s
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190 {
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191 char *sym;
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192 int val;
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193 symlist_t *next;
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194
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195 };
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196
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197 extern symlist_t *symlist;
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198
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199 #endif //__lwlink_h_seen__