Mercurial > hg > index.cgi
annotate lwlink/readfiles.c @ 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 | 606123758641 |
children | ce1fdc8d6568 |
rev | line source |
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0
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1 /* |
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2 readfiles.c |
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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 |
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21 Reads input files |
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22 |
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23 */ |
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24 |
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25 #include <errno.h> |
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26 #include <stdio.h> |
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27 #include <stdlib.h> |
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28 #include <string.h> |
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29 |
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30 #include <lw_alloc.h> |
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31 #include <lw_string.h> |
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32 |
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33 #include "lwlink.h" |
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34 |
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35 void read_lwobj16v0(fileinfo_t *fn); |
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36 void read_lwar1v(fileinfo_t *fn); |
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37 |
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38 /* |
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39 The logic of reading the entire file into memory is simple. All the symbol |
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40 names in the file are NUL terminated strings and can be used directly without |
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41 making additional copies. |
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42 */ |
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43 void read_file(fileinfo_t *fn) |
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44 { |
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45 if (!memcmp(fn -> filedata, "LWOBJ16", 8)) |
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46 { |
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47 // read v0 LWOBJ16 file |
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48 read_lwobj16v0(fn); |
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49 } |
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50 else if (!memcmp(fn -> filedata, "LWAR1V", 6)) |
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51 { |
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52 // archive file |
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53 read_lwar1v(fn); |
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54 } |
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55 else |
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56 { |
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57 fprintf(stderr, "%s: unknown file format\n", fn -> filename); |
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58 exit(1); |
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59 } |
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60 } |
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61 |
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62 void read_files(void) |
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63 { |
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64 int i; |
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65 long size; |
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66 FILE *f; |
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67 long bread; |
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68 for (i = 0; i < ninputfiles; i++) |
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69 { |
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70 if (inputfiles[i] -> islib) |
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71 { |
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72 char *tf; |
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73 int s; |
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74 int j; |
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75 |
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76 f = NULL; |
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77 |
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78 for (j = 0; j < nlibdirs; j++) |
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79 { |
179
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80 if (libdirs[j][0] == '=') |
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81 { |
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82 // handle sysroot |
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83 s = strlen(libdirs[j]) + 7 + strlen(sysroot) + strlen(inputfiles[i] -> filename); |
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84 tf = lw_alloc(s + 1); |
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85 sprintf(tf, "%s/%s/lib%s.a", sysroot, libdirs[j] + 1, inputfiles[i] -> filename); |
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86 } |
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87 else |
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88 { |
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89 s = strlen(libdirs[j]) + 7 + strlen(inputfiles[i] -> filename); |
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90 tf = lw_alloc(s + 1); |
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91 sprintf(tf, "%s/lib%s.a", libdirs[j], inputfiles[i] -> filename); |
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92 } |
0
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93 f = fopen(tf, "rb"); |
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94 if (!f) |
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95 { |
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96 free(tf); |
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97 continue; |
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98 } |
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99 free(tf); |
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100 break; |
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101 } |
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102 if (!f) |
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103 { |
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104 fprintf(stderr, "Can't open library: -l%s\n", inputfiles[i] -> filename); |
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105 exit(1); |
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106 } |
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107 } |
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108 else |
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109 { |
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110 f = fopen(inputfiles[i] -> filename, "rb"); |
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111 if (!f) |
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112 { |
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113 fprintf(stderr, "Can't open file %s:", inputfiles[i] -> filename); |
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114 perror(""); |
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115 exit(1); |
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116 } |
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117 } |
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118 fseek(f, 0, SEEK_END); |
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119 size = ftell(f); |
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120 rewind(f); |
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121 |
8
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122 inputfiles[i] -> filedata = lw_alloc(size); |
0
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123 inputfiles[i] -> filesize = size; |
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124 |
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125 bread = fread(inputfiles[i] -> filedata, 1, size, f); |
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126 if (bread < size) |
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127 { |
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128 fprintf(stderr, "Short read on file %s (%ld/%ld):", inputfiles[i] -> filename, bread, size); |
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129 perror(""); |
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130 exit(1); |
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131 } |
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132 |
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133 fclose(f); |
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134 |
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135 read_file(inputfiles[i]); |
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136 } |
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137 } |
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138 |
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139 // this macro is used to bail out if we run off the end of the file data |
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140 // while parsing - it keeps the code below cleaner |
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141 #define NEXTBYTE() do { cc++; if (cc > fn -> filesize) { fprintf(stderr, "%s: invalid file format\n", fn -> filename); exit(1); } } while (0) |
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142 // this macro is used to refer to the current byte in the stream |
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143 #define CURBYTE() (fn -> filedata[cc < fn -> filesize ? cc : fn -> filesize - 1]) |
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144 // this one will leave the input pointer past the trailing NUL |
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145 #define CURSTR() read_lwobj16v0_str(&cc, fn) |
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146 unsigned char *read_lwobj16v0_str(long *cc1, fileinfo_t *fn) |
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147 { |
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148 int cc = *cc1; |
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149 unsigned char *fp; |
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150 fp = &CURBYTE(); |
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151 while (CURBYTE()) |
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152 NEXTBYTE(); |
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153 NEXTBYTE(); |
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154 *cc1 = cc; |
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155 return fp; |
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156 } |
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157 // the function below can be switched to dealing with data coming from a |
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158 // source other than an in-memory byte pool by adjusting the input data |
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159 // in "fn" and the above two macros |
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160 |
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161 void read_lwobj16v0(fileinfo_t *fn) |
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162 { |
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163 unsigned char *fp; |
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164 long cc; |
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165 section_t *s; |
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166 int val; |
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167 symtab_t *se; |
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168 |
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169 // start reading *after* the magic number |
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170 cc = 8; |
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171 |
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172 // init data |
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173 fn -> sections = NULL; |
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174 fn -> nsections = 0; |
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175 |
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176 while (1) |
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177 { |
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178 // NEXTBYTE(); |
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179 // bail out if no more sections |
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180 if (!(CURBYTE())) |
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181 break; |
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182 |
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183 fp = CURSTR(); |
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184 |
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185 // we now have a section name in fp |
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186 // create new section entry |
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187 fn -> sections = lw_realloc(fn -> sections, sizeof(section_t) * (fn -> nsections + 1)); |
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188 s = &(fn -> sections[fn -> nsections]); |
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189 fn -> nsections += 1; |
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190 |
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191 s -> localsyms = NULL; |
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192 s -> flags = 0; |
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193 s -> codesize = 0; |
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194 s -> name = fp; |
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195 s -> loadaddress = 0; |
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196 s -> localsyms = NULL; |
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197 s -> exportedsyms = NULL; |
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198 s -> incompletes = NULL; |
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199 s -> processed = 0; |
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200 s -> file = fn; |
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201 |
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202 // read flags |
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203 while (CURBYTE()) |
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204 { |
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205 switch (CURBYTE()) |
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206 { |
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207 case 0x01: |
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208 s -> flags |= SECTION_BSS; |
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209 break; |
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210 |
156
fc8386b13399
Added 'constant' sections to object file handling for lwasm and lwlink
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211 case 0x02: |
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212 s -> flags |= SECTION_CONST; |
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213 break; |
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214 |
0
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215 default: |
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216 fprintf(stderr, "%s (%s): unrecognized section flag %02X\n", fn -> filename, s -> name, (int)(CURBYTE())); |
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217 exit(1); |
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218 } |
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219 NEXTBYTE(); |
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220 } |
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221 // skip NUL terminating flags |
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222 NEXTBYTE(); |
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223 |
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224 // now parse the local symbol table |
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225 while (CURBYTE()) |
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226 { |
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227 fp = CURSTR(); |
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228 |
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229 // fp is the symbol name |
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230 val = (CURBYTE()) << 8; |
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231 NEXTBYTE(); |
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232 val |= (CURBYTE()); |
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233 NEXTBYTE(); |
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234 // val is now the symbol value |
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235 |
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236 // create symbol table entry |
8
fdc11ef4115b
Switched lwlink to lw_cmdline from argp and also brought in lw_alloc and lw_string to replace util.c
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237 se = lw_alloc(sizeof(symtab_t)); |
0
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238 se -> next = s -> localsyms; |
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239 s -> localsyms = se; |
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240 se -> sym = fp; |
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241 se -> offset = val; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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242 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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243 // skip terminating NUL |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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parents:
diff
changeset
|
244 NEXTBYTE(); |
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
|
245 |
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
|
246 // now parse the exported symbol table |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
247 while (CURBYTE()) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
248 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
249 fp = CURSTR(); |
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
|
250 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
251 // fp is the symbol name |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
252 val = (CURBYTE()) << 8; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
253 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
254 val |= (CURBYTE()); |
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
|
255 NEXTBYTE(); |
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
|
256 // val is now the symbol value |
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
|
257 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
258 // create symbol table entry |
8
fdc11ef4115b
Switched lwlink to lw_cmdline from argp and also brought in lw_alloc and lw_string to replace util.c
lost@l-w.ca
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2
diff
changeset
|
259 se = lw_alloc(sizeof(symtab_t)); |
0
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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260 se -> next = s -> exportedsyms; |
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
|
261 s -> exportedsyms = se; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
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262 se -> sym = fp; |
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
|
263 se -> offset = val; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
264 } |
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
|
265 // skip terminating NUL |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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changeset
|
266 NEXTBYTE(); |
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
|
267 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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268 // now parse the incomplete references and make a list of |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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269 // external references that need resolution |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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270 while (CURBYTE()) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
271 { |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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272 reloc_t *rp; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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273 lw_expr_term_t *term; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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274 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
275 // we have a reference |
8
fdc11ef4115b
Switched lwlink to lw_cmdline from argp and also brought in lw_alloc and lw_string to replace util.c
lost@l-w.ca
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2
diff
changeset
|
276 rp = lw_alloc(sizeof(reloc_t)); |
0
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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277 rp -> next = s -> incompletes; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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278 s -> incompletes = rp; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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279 rp -> offset = 0; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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changeset
|
280 rp -> expr = lw_expr_stack_create(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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|
281 rp -> flags = RELOC_NORM; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
282 |
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
|
283 // parse the expression |
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
|
284 while (CURBYTE()) |
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
|
285 { |
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
|
286 int tt = CURBYTE(); |
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
|
287 NEXTBYTE(); |
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
|
288 switch (tt) |
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
|
289 { |
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
|
290 case 0xFF: |
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
|
291 // a flag specifier |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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292 tt = CURBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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293 rp -> flags = tt; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
294 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
295 term = NULL; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
296 break; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
297 |
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
|
298 case 0x01: |
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
|
299 // 16 bit integer |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
300 tt = CURBYTE() << 8; |
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
|
301 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
302 tt |= CURBYTE(); |
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
|
303 NEXTBYTE(); |
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
|
304 // normalize for negatives... |
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
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305 if (tt > 0x7fff) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
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|
306 tt -= 0x10000; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
307 term = lw_expr_term_create_int(tt); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff
changeset
|
308 break; |
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
|
309 |
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
|
310 case 0x02: |
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
|
311 // external symbol reference |
2
7317fbe024af
Clean up insane number of compiler warnings under -Wall
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parents:
0
diff
changeset
|
312 term = lw_expr_term_create_sym((char *)CURSTR(), 0); |
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
|
313 break; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
314 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
315 case 0x03: |
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
|
316 // internal symbol reference |
2
7317fbe024af
Clean up insane number of compiler warnings under -Wall
lost@l-w.ca
parents:
0
diff
changeset
|
317 term = lw_expr_term_create_sym((char *)CURSTR(), 1); |
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
|
318 break; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
319 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
320 case 0x04: |
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
|
321 // operator |
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
|
322 term = lw_expr_term_create_oper(CURBYTE()); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
323 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
324 break; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
325 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
326 case 0x05: |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
327 // section base reference (NULL internal reference 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
|
328 // the section base address |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
329 term = lw_expr_term_create_sym(NULL, 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
|
330 break; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
331 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
332 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
|
333 fprintf(stderr, "%s (%s): bad relocation expression (%02X)\n", fn -> filename, s -> name, tt); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
334 exit(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
|
335 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
336 if (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
|
337 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
338 lw_expr_stack_push(rp -> expr, 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
|
339 lw_expr_term_free(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
|
340 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
341 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
342 // skip the NUL |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
343 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
344 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
345 // fetch the offset |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
346 rp -> offset = CURBYTE() << 8; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
347 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
348 rp -> offset |= CURBYTE() & 0xff; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
349 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
350 } |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
351 // skip the NUL terminating the relocations |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
352 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
353 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
354 // now set code location and size and verify that 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
|
355 // contains data going to the end of the code (if !SECTION_BSS) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
356 s -> codesize = CURBYTE() << 8; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
357 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
358 s -> codesize |= CURBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
359 NEXTBYTE(); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
360 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
361 s -> code = &(CURBYTE()); |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
362 |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
363 // skip the code if we're not in a BSS 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
|
364 if (!(s -> flags & SECTION_BSS)) |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
365 { |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
|
366 int i; |
2c24602be78f
Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff
changeset
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367 for (i = 0; i < s -> codesize; i++) |
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368 NEXTBYTE(); |
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369 } |
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370 } |
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371 } |
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372 |
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373 /* |
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374 Read an archive file - this will create a "sub" record and farm out the |
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375 parsing of the sub files to the regular file parsers |
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376 |
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377 The archive file format consists of the 6 byte magic number followed by a |
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378 series of records as follows: |
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379 |
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380 - NUL terminated file name |
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381 - 32 bit file length in big endian order |
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382 - the file data |
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383 |
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384 An empty file name indicates the end of the file. |
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385 |
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386 */ |
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387 void read_lwar1v(fileinfo_t *fn) |
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388 { |
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389 unsigned long cc = 6; |
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390 unsigned long flen; |
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391 unsigned long l; |
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392 for (;;) |
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393 { |
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394 if (cc >= fn -> filesize || !(fn -> filedata[cc])) |
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395 return; |
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396 |
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397 for (l = cc; cc < fn -> filesize && fn -> filedata[cc]; cc++) |
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398 /* do nothing */ ; |
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399 |
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400 cc++; |
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401 |
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402 if (cc >= fn -> filesize) |
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403 { |
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404 fprintf(stderr, "Malformed archive file %s.\n", fn -> filename); |
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405 exit(1); |
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406 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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407 |
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408 if (cc + 4 > fn -> filesize) |
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409 return; |
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410 |
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411 flen = (fn -> filedata[cc++] << 24); |
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412 flen |= (fn -> filedata[cc++] << 16); |
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413 flen |= (fn -> filedata[cc++] << 8); |
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414 flen |= (fn -> filedata[cc++]); |
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415 |
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416 if (flen == 0) |
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417 return; |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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418 |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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419 if (cc + flen > fn -> filesize) |
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420 { |
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421 fprintf(stderr, "Malformed archive file %s.\n", fn -> filename); |
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422 exit(1); |
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423 } |
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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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424 |
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425 // add the "sub" input file |
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426 fn -> subs = lw_realloc(fn -> subs, sizeof(fileinfo_t *) * (fn -> nsubs + 1)); |
8
fdc11ef4115b
Switched lwlink to lw_cmdline from argp and also brought in lw_alloc and lw_string to replace util.c
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427 fn -> subs[fn -> nsubs] = lw_alloc(sizeof(fileinfo_t)); |
0
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428 memset(fn -> subs[fn -> nsubs], 0, sizeof(fileinfo_t)); |
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429 fn -> subs[fn -> nsubs] -> filedata = fn -> filedata + cc; |
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430 fn -> subs[fn -> nsubs] -> filesize = flen; |
2
7317fbe024af
Clean up insane number of compiler warnings under -Wall
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431 fn -> subs[fn -> nsubs] -> filename = lw_strdup((char *)(fn -> filedata + l)); |
0
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432 fn -> subs[fn -> nsubs] -> parent = fn; |
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433 fn -> subs[fn -> nsubs] -> forced = fn -> forced; |
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434 read_file(fn -> subs[fn -> nsubs]); |
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435 fn -> nsubs++; |
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436 cc += flen; |
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437 } |
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438 } |