Mercurial > hg > index.cgi
annotate lwlink/lwlink.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 | c6a38fd8bd33 |
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rev | line source |
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1 /* |
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2 lwlink.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 |
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22 */ |
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23 |
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24 #define __lwlink_c_seen__ |
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25 |
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26 #include <errno.h> |
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27 #include <stdio.h> |
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28 #include <stdlib.h> |
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29 #include <string.h> |
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30 |
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31 #include <lw_alloc.h> |
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32 #include <lw_string.h> |
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33 |
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34 #include "lwlink.h" |
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35 |
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36 int debug_level = 0; |
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37 int outformat = OUTPUT_DECB; |
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38 char *outfile = NULL; |
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39 char *scriptfile = NULL; |
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40 int symerr = 0; |
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41 char *map_file = NULL; |
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42 |
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43 fileinfo_t **inputfiles = NULL; |
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44 int ninputfiles = 0; |
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45 |
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46 int nlibdirs = 0; |
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47 char **libdirs = NULL; |
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48 |
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49 int nscriptls = 0; |
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50 char **scriptls = NULL; |
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51 |
179
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Added --sysroot support to lwlink and the ld wrapper script
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52 char *sysroot = "/"; |
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53 |
183 | 54 char *entrysym = NULL; |
55 | |
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56 void add_input_file(char *fn) |
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57 { |
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58 inputfiles = lw_realloc(inputfiles, sizeof(fileinfo_t *) * (ninputfiles + 1)); |
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59 inputfiles[ninputfiles] = lw_alloc(sizeof(fileinfo_t)); |
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60 memset(inputfiles[ninputfiles], 0, sizeof(fileinfo_t)); |
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61 inputfiles[ninputfiles] -> forced = 1; |
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62 inputfiles[ninputfiles++] -> filename = lw_strdup(fn); |
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63 } |
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64 |
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65 void add_input_library(char *libname) |
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66 { |
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67 inputfiles = lw_realloc(inputfiles, sizeof(fileinfo_t *) * (ninputfiles + 1)); |
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68 inputfiles[ninputfiles] = lw_alloc(sizeof(fileinfo_t)); |
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69 memset(inputfiles[ninputfiles], 0, sizeof(fileinfo_t)); |
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70 inputfiles[ninputfiles] -> islib = 1; |
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71 inputfiles[ninputfiles] -> forced = 0; |
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72 inputfiles[ninputfiles++] -> filename = lw_strdup(libname); |
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73 } |
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74 |
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75 void add_library_search(char *libdir) |
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76 { |
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77 libdirs = lw_realloc(libdirs, sizeof(char*) * (nlibdirs + 1)); |
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78 libdirs[nlibdirs] = lw_strdup(libdir); |
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79 nlibdirs++; |
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80 } |
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81 |
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82 void add_section_base(char *sectspec) |
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83 { |
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84 char *base; |
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85 int baseaddr; |
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86 char *t; |
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87 int l; |
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88 |
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89 base = strchr(sectspec, '='); |
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90 if (!base) |
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91 { |
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92 l = strlen(sectspec); |
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93 baseaddr = 0; |
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94 } |
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95 else |
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96 { |
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97 baseaddr = strtol(base + 1, NULL, 16); |
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98 l = base - sectspec; |
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99 *base = '\0'; |
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100 } |
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101 baseaddr = baseaddr & 0xffff; |
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102 |
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103 t = lw_alloc(l + 25); |
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104 sprintf(t, "section %s load %04X", sectspec, baseaddr); |
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105 if (base) |
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106 *base = '='; |
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107 |
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108 scriptls = lw_realloc(scriptls, sizeof(char *) * (nscriptls + 1)); |
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109 scriptls[nscriptls++] = t; |
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110 } |
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111 |
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112 char *sanitize_symbol(char *symbol) |
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113 { |
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114 static char symbuf[2048]; |
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115 char *sym = symbol; |
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116 char *tp = symbuf; |
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117 |
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118 for (; *sym; sym++) |
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119 { |
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120 int c1 = *sym; |
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121 if (c1 == '\\') |
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122 { |
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123 *tp++ = '\\'; |
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124 *tp++ = '\\'; |
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125 continue; |
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126 } |
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127 if (c1 < 32 || c1 > 126) |
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128 { |
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129 int c; |
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130 *tp++ = '\\'; |
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131 c = c1 >> 4; |
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132 c += 48; |
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133 if (c > 57) |
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134 c += 7; |
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135 *tp++ = c; |
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136 c = c1 & 15; |
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137 c += 48; |
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138 if (c > 57) |
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139 c += 7; |
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140 *tp++ = c; |
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141 continue; |
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142 } |
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143 *tp++ = c1; |
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144 } |
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145 *tp = 0; |
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146 return symbuf; |
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147 } |