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Rev | Author | Line No. | Line |
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5199 | serge | 1 | /* Main program of GNU linker. |
6324 | serge | 2 | Copyright (C) 1991-2015 Free Software Foundation, Inc. |
5199 | serge | 3 | Written by Steve Chamberlain steve@cygnus.com |
4 | |||
5 | This file is part of the GNU Binutils. |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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20 | MA 02110-1301, USA. */ |
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21 | |||
22 | #include "sysdep.h" |
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23 | #include "bfd.h" |
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24 | #include "safe-ctype.h" |
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25 | #include "libiberty.h" |
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26 | #include "progress.h" |
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27 | #include "bfdlink.h" |
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28 | #include "filenames.h" |
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29 | |||
30 | #include "ld.h" |
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31 | #include "ldmain.h" |
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32 | #include "ldmisc.h" |
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33 | #include "ldwrite.h" |
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34 | #include "ldexp.h" |
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35 | #include "ldlang.h" |
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36 | #include |
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37 | #include "ldlex.h" |
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38 | #include "ldfile.h" |
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39 | #include "ldemul.h" |
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40 | #include "ldctor.h" |
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41 | #ifdef ENABLE_PLUGINS |
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42 | #include "plugin.h" |
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43 | #include "plugin-api.h" |
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44 | #endif /* ENABLE_PLUGINS */ |
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45 | |||
46 | /* Somewhere above, sys/stat.h got included. */ |
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47 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
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48 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) |
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49 | #endif |
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50 | |||
51 | #include |
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52 | |||
53 | #ifdef HAVE_SBRK |
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54 | #if !HAVE_DECL_SBRK |
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55 | extern void *sbrk (); |
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56 | #endif |
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57 | #endif |
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58 | |||
59 | #ifndef TARGET_SYSTEM_ROOT |
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60 | #define TARGET_SYSTEM_ROOT "" |
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61 | #endif |
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62 | |||
63 | /* EXPORTS */ |
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64 | |||
65 | FILE *saved_script_handle = NULL; |
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66 | FILE *previous_script_handle = NULL; |
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67 | bfd_boolean force_make_executable = FALSE; |
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68 | |||
69 | char *default_target; |
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70 | const char *output_filename = "a.out"; |
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71 | |||
72 | /* Name this program was invoked by. */ |
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73 | char *program_name; |
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74 | |||
75 | /* The prefix for system library directories. */ |
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76 | const char *ld_sysroot; |
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77 | |||
78 | /* The canonical representation of ld_sysroot. */ |
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79 | char * ld_canon_sysroot; |
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80 | int ld_canon_sysroot_len; |
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81 | |||
82 | /* Set by -G argument, for targets like MIPS ELF. */ |
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83 | int g_switch_value = 8; |
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84 | |||
85 | /* Nonzero means print names of input files as processed. */ |
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86 | bfd_boolean trace_files; |
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87 | |||
88 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
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89 | bfd_boolean verbose; |
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90 | |||
91 | /* Nonzero means version number was printed, so exit successfully |
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92 | instead of complaining if no input files are given. */ |
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93 | bfd_boolean version_printed; |
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94 | |||
95 | /* TRUE if we should demangle symbol names. */ |
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96 | bfd_boolean demangling; |
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97 | |||
98 | args_type command_line; |
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99 | |||
100 | ld_config_type config; |
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101 | |||
102 | sort_type sort_section; |
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103 | |||
104 | static const char *get_sysroot |
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105 | (int, char **); |
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106 | static char *get_emulation |
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107 | (int, char **); |
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108 | static bfd_boolean add_archive_element |
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109 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
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110 | static bfd_boolean multiple_definition |
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111 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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112 | bfd *, asection *, bfd_vma); |
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113 | static bfd_boolean multiple_common |
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114 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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115 | bfd *, enum bfd_link_hash_type, bfd_vma); |
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116 | static bfd_boolean add_to_set |
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117 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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118 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); |
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119 | static bfd_boolean constructor_callback |
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120 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
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121 | asection *, bfd_vma); |
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122 | static bfd_boolean warning_callback |
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123 | (struct bfd_link_info *, const char *, const char *, bfd *, |
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124 | asection *, bfd_vma); |
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125 | static void warning_find_reloc |
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126 | (bfd *, asection *, void *); |
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127 | static bfd_boolean undefined_symbol |
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128 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
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129 | bfd_boolean); |
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130 | static bfd_boolean reloc_overflow |
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131 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
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132 | const char *, bfd_vma, bfd *, asection *, bfd_vma); |
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133 | static bfd_boolean reloc_dangerous |
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134 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
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135 | static bfd_boolean unattached_reloc |
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136 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
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137 | static bfd_boolean notice |
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138 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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6324 | serge | 139 | struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword); |
5199 | serge | 140 | |
141 | static struct bfd_link_callbacks link_callbacks = |
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142 | { |
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143 | add_archive_element, |
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144 | multiple_definition, |
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145 | multiple_common, |
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146 | add_to_set, |
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147 | constructor_callback, |
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148 | warning_callback, |
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149 | undefined_symbol, |
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150 | reloc_overflow, |
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151 | reloc_dangerous, |
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152 | unattached_reloc, |
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153 | notice, |
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154 | einfo, |
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155 | info_msg, |
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156 | minfo, |
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157 | ldlang_override_segment_assignment |
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158 | }; |
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159 | |||
160 | static bfd_assert_handler_type default_bfd_assert_handler; |
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161 | |||
162 | struct bfd_link_info link_info; |
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163 | |||
164 | static void |
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165 | ld_cleanup (void) |
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166 | { |
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167 | bfd_cache_close_all (); |
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168 | #ifdef ENABLE_PLUGINS |
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169 | plugin_call_cleanup (); |
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170 | #endif |
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171 | if (output_filename && delete_output_file_on_failure) |
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172 | unlink_if_ordinary (output_filename); |
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173 | } |
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174 | |||
175 | /* If there's a BFD assertion, we'll notice and exit with an error |
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176 | unless otherwise instructed. */ |
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177 | |||
178 | static void |
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179 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, |
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180 | const char *file, int line) |
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181 | { |
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182 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); |
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183 | config.make_executable = FALSE; |
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184 | } |
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185 | |||
186 | int |
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187 | main (int argc, char **argv) |
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188 | { |
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189 | char *emulation; |
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190 | long start_time = get_run_time (); |
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191 | #ifdef HAVE_SBRK |
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192 | char *start_sbrk = (char *) sbrk (0); |
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193 | #endif |
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194 | |||
195 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
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196 | setlocale (LC_MESSAGES, ""); |
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197 | #endif |
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198 | #if defined (HAVE_SETLOCALE) |
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199 | setlocale (LC_CTYPE, ""); |
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200 | #endif |
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201 | bindtextdomain (PACKAGE, LOCALEDIR); |
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202 | textdomain (PACKAGE); |
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203 | |||
204 | program_name = argv[0]; |
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205 | xmalloc_set_program_name (program_name); |
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206 | |||
207 | START_PROGRESS (program_name, 0); |
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208 | |||
209 | expandargv (&argc, &argv); |
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210 | |||
211 | bfd_init (); |
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212 | |||
213 | bfd_set_error_program_name (program_name); |
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214 | |||
215 | /* We want to notice and fail on those nasty BFD assertions which are |
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216 | likely to signal incorrect output being generated but otherwise may |
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217 | leave no trace. */ |
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218 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); |
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219 | |||
220 | xatexit (ld_cleanup); |
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221 | |||
222 | /* Set up the sysroot directory. */ |
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223 | ld_sysroot = get_sysroot (argc, argv); |
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224 | if (*ld_sysroot) |
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225 | ld_canon_sysroot = lrealpath (ld_sysroot); |
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226 | if (ld_canon_sysroot) |
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227 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); |
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228 | else |
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229 | ld_canon_sysroot_len = -1; |
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230 | |||
231 | /* Set the default BFD target based on the configured target. Doing |
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232 | this permits the linker to be configured for a particular target, |
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233 | and linked against a shared BFD library which was configured for |
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234 | a different target. The macro TARGET is defined by Makefile. */ |
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235 | if (! bfd_set_default_target (TARGET)) |
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236 | { |
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237 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); |
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238 | xexit (1); |
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239 | } |
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240 | |||
241 | #if YYDEBUG |
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242 | { |
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243 | extern int yydebug; |
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244 | yydebug = 1; |
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245 | } |
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246 | #endif |
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247 | |||
248 | config.build_constructors = TRUE; |
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249 | config.rpath_separator = ':'; |
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250 | config.split_by_reloc = (unsigned) -1; |
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251 | config.split_by_file = (bfd_size_type) -1; |
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252 | config.make_executable = TRUE; |
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253 | config.magic_demand_paged = TRUE; |
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254 | config.text_read_only = TRUE; |
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255 | link_info.disable_target_specific_optimizations = -1; |
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256 | |||
257 | command_line.warn_mismatch = TRUE; |
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258 | command_line.warn_search_mismatch = TRUE; |
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259 | command_line.check_section_addresses = -1; |
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260 | |||
261 | /* We initialize DEMANGLING based on the environment variable |
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262 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the |
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263 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the |
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264 | environment. Acting the same way here lets us provide the same |
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265 | interface by default. */ |
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266 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; |
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267 | |||
268 | link_info.allow_undefined_version = TRUE; |
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269 | link_info.keep_memory = TRUE; |
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270 | link_info.combreloc = TRUE; |
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271 | link_info.strip_discarded = TRUE; |
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272 | link_info.emit_hash = TRUE; |
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273 | link_info.callbacks = &link_callbacks; |
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274 | link_info.input_bfds_tail = &link_info.input_bfds; |
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275 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
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276 | and _fini symbols. We are compatible. */ |
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277 | link_info.init_function = "_init"; |
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278 | link_info.fini_function = "_fini"; |
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279 | link_info.relax_pass = 1; |
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6324 | serge | 280 | link_info.extern_protected_data = -1; |
5199 | serge | 281 | link_info.pei386_auto_import = -1; |
282 | link_info.spare_dynamic_tags = 5; |
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283 | link_info.path_separator = ':'; |
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6324 | serge | 284 | #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
285 | link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
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286 | #endif |
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5199 | serge | 287 | |
288 | ldfile_add_arch (""); |
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289 | emulation = get_emulation (argc, argv); |
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290 | ldemul_choose_mode (emulation); |
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291 | default_target = ldemul_choose_target (argc, argv); |
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292 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
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293 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); |
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294 | lang_init (); |
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6324 | serge | 295 | ldexp_init (); |
5199 | serge | 296 | ldemul_before_parse (); |
297 | lang_has_input_file = FALSE; |
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298 | parse_args (argc, argv); |
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299 | |||
300 | if (config.hash_table_size != 0) |
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301 | bfd_hash_set_default_size (config.hash_table_size); |
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302 | |||
303 | #ifdef ENABLE_PLUGINS |
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304 | /* Now all the plugin arguments have been gathered, we can load them. */ |
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305 | plugin_load_plugins (); |
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306 | #endif /* ENABLE_PLUGINS */ |
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307 | |||
308 | ldemul_set_symbols (); |
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309 | |||
310 | /* If we have not already opened and parsed a linker script, |
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311 | try the default script from command line first. */ |
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312 | if (saved_script_handle == NULL |
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313 | && command_line.default_script != NULL) |
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314 | { |
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315 | ldfile_open_command_file (command_line.default_script); |
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316 | parser_input = input_script; |
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317 | yyparse (); |
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318 | } |
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319 | |||
320 | /* If we have not already opened and parsed a linker script |
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321 | read the emulation's appropriate default script. */ |
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322 | if (saved_script_handle == NULL) |
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323 | { |
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324 | int isfile; |
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325 | char *s = ldemul_get_script (&isfile); |
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326 | |||
327 | if (isfile) |
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328 | ldfile_open_default_command_file (s); |
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329 | else |
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330 | { |
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331 | lex_string = s; |
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332 | lex_redirect (s, _("built in linker script"), 1); |
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333 | } |
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334 | parser_input = input_script; |
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335 | yyparse (); |
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336 | lex_string = NULL; |
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337 | } |
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338 | |||
339 | if (verbose) |
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340 | { |
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341 | if (saved_script_handle) |
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342 | info_msg (_("using external linker script:")); |
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343 | else |
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344 | info_msg (_("using internal linker script:")); |
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345 | info_msg ("\n==================================================\n"); |
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346 | |||
347 | if (saved_script_handle) |
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348 | { |
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349 | static const int ld_bufsz = 8193; |
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350 | size_t n; |
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351 | char *buf = (char *) xmalloc (ld_bufsz); |
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352 | |||
353 | rewind (saved_script_handle); |
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354 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
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355 | { |
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356 | buf[n] = 0; |
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357 | info_msg (buf); |
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358 | } |
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359 | rewind (saved_script_handle); |
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360 | free (buf); |
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361 | } |
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362 | else |
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363 | { |
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364 | int isfile; |
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365 | |||
366 | info_msg (ldemul_get_script (&isfile)); |
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367 | } |
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368 | |||
369 | info_msg ("\n==================================================\n"); |
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370 | } |
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371 | |||
372 | if (command_line.print_output_format) |
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373 | info_msg ("%s\n", lang_get_output_target ()); |
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374 | |||
375 | lang_final (); |
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376 | |||
6324 | serge | 377 | /* If the only command line argument has been -v or --version or --verbose |
378 | then ignore any input files provided by linker scripts and exit now. |
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379 | We do not want to create an output file when the linker is just invoked |
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380 | to provide version information. */ |
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381 | if (argc == 2 && version_printed) |
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382 | xexit (0); |
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383 | |||
5199 | serge | 384 | if (!lang_has_input_file) |
385 | { |
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386 | if (version_printed || command_line.print_output_format) |
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387 | xexit (0); |
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388 | einfo (_("%P%F: no input files\n")); |
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389 | } |
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390 | |||
391 | if (trace_files) |
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392 | info_msg (_("%P: mode %s\n"), emulation); |
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393 | |||
394 | ldemul_after_parse (); |
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395 | |||
396 | if (config.map_filename) |
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397 | { |
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398 | if (strcmp (config.map_filename, "-") == 0) |
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399 | { |
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400 | config.map_file = stdout; |
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401 | } |
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402 | else |
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403 | { |
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404 | config.map_file = fopen (config.map_filename, FOPEN_WT); |
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405 | if (config.map_file == (FILE *) NULL) |
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406 | { |
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407 | bfd_set_error (bfd_error_system_call); |
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408 | einfo (_("%P%F: cannot open map file %s: %E\n"), |
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409 | config.map_filename); |
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410 | } |
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411 | } |
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412 | } |
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413 | |||
414 | lang_process (); |
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415 | |||
416 | /* Print error messages for any missing symbols, for any warning |
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417 | symbols, and possibly multiple definitions. */ |
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6324 | serge | 418 | if (bfd_link_relocatable (&link_info)) |
5199 | serge | 419 | link_info.output_bfd->flags &= ~EXEC_P; |
420 | else |
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421 | link_info.output_bfd->flags |= EXEC_P; |
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422 | |||
6324 | serge | 423 | if ((link_info.compress_debug & COMPRESS_DEBUG)) |
424 | { |
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425 | link_info.output_bfd->flags |= BFD_COMPRESS; |
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426 | if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) |
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427 | link_info.output_bfd->flags |= BFD_COMPRESS_GABI; |
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428 | } |
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429 | |||
5199 | serge | 430 | ldwrite (); |
431 | |||
432 | if (config.map_file != NULL) |
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433 | lang_map (); |
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434 | if (command_line.cref) |
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435 | output_cref (config.map_file != NULL ? config.map_file : stdout); |
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436 | if (nocrossref_list != NULL) |
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437 | check_nocrossrefs (); |
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6324 | serge | 438 | if (command_line.print_memory_usage) |
439 | lang_print_memory_usage (); |
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440 | #if 0 |
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441 | { |
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442 | struct bfd_link_hash_entry * h; |
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5199 | serge | 443 | |
6324 | serge | 444 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
445 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); |
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446 | } |
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447 | #endif |
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448 | ldexp_finish (); |
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5199 | serge | 449 | lang_finish (); |
450 | |||
451 | /* Even if we're producing relocatable output, some non-fatal errors should |
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452 | be reported in the exit status. (What non-fatal errors, if any, do we |
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453 | want to ignore for relocatable output?) */ |
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454 | if (!config.make_executable && !force_make_executable) |
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455 | { |
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456 | if (trace_files) |
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457 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
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458 | output_filename); |
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459 | |||
460 | /* The file will be removed by ld_cleanup. */ |
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461 | xexit (1); |
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462 | } |
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463 | else |
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464 | { |
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465 | if (! bfd_close (link_info.output_bfd)) |
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466 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); |
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467 | |||
468 | /* If the --force-exe-suffix is enabled, and we're making an |
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469 | executable file and it doesn't end in .exe, copy it to one |
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470 | which does. */ |
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6324 | serge | 471 | if (!bfd_link_relocatable (&link_info) |
472 | && command_line.force_exe_suffix) |
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5199 | serge | 473 | { |
474 | int len = strlen (output_filename); |
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475 | |||
476 | if (len < 4 |
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477 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
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478 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) |
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479 | { |
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480 | FILE *src; |
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481 | FILE *dst; |
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482 | const int bsize = 4096; |
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483 | char *buf = (char *) xmalloc (bsize); |
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484 | int l; |
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485 | char *dst_name = (char *) xmalloc (len + 5); |
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486 | |||
487 | strcpy (dst_name, output_filename); |
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488 | strcat (dst_name, ".exe"); |
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489 | src = fopen (output_filename, FOPEN_RB); |
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490 | dst = fopen (dst_name, FOPEN_WB); |
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491 | |||
492 | if (!src) |
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6324 | serge | 493 | einfo (_("%P%F: unable to open for source of copy `%s'\n"), |
5199 | serge | 494 | output_filename); |
495 | if (!dst) |
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6324 | serge | 496 | einfo (_("%P%F: unable to open for destination of copy `%s'\n"), |
5199 | serge | 497 | dst_name); |
498 | while ((l = fread (buf, 1, bsize, src)) > 0) |
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499 | { |
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500 | int done = fwrite (buf, 1, l, dst); |
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501 | |||
502 | if (done != l) |
||
503 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
||
504 | } |
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505 | |||
506 | fclose (src); |
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507 | if (fclose (dst) == EOF) |
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508 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
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509 | free (dst_name); |
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510 | free (buf); |
||
511 | } |
||
512 | } |
||
513 | } |
||
514 | |||
515 | END_PROGRESS (program_name); |
||
516 | |||
517 | if (config.stats) |
||
518 | { |
||
519 | #ifdef HAVE_SBRK |
||
520 | char *lim = (char *) sbrk (0); |
||
521 | #endif |
||
522 | long run_time = get_run_time () - start_time; |
||
523 | |||
524 | fflush (stdout); |
||
525 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
||
526 | program_name, run_time / 1000000, run_time % 1000000); |
||
527 | #ifdef HAVE_SBRK |
||
528 | fprintf (stderr, _("%s: data size %ld\n"), program_name, |
||
529 | (long) (lim - start_sbrk)); |
||
530 | #endif |
||
531 | fflush (stderr); |
||
532 | } |
||
533 | |||
534 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
||
535 | output_filename = NULL; |
||
536 | |||
537 | xexit (0); |
||
538 | return 0; |
||
539 | } |
||
540 | |||
541 | /* If the configured sysroot is relocatable, try relocating it based on |
||
542 | default prefix FROM. Return the relocated directory if it exists, |
||
543 | otherwise return null. */ |
||
544 | |||
545 | static char * |
||
546 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) |
||
547 | { |
||
548 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE |
||
549 | char *path; |
||
550 | struct stat s; |
||
551 | |||
552 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); |
||
553 | if (path) |
||
554 | { |
||
555 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) |
||
556 | return path; |
||
557 | free (path); |
||
558 | } |
||
559 | #endif |
||
560 | return 0; |
||
561 | } |
||
562 | |||
563 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ |
||
564 | |||
565 | static const char * |
||
566 | get_sysroot (int argc, char **argv) |
||
567 | { |
||
568 | int i; |
||
569 | const char *path; |
||
570 | |||
571 | for (i = 1; i < argc; i++) |
||
572 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
||
573 | return argv[i] + strlen ("--sysroot="); |
||
574 | |||
575 | path = get_relative_sysroot (BINDIR); |
||
576 | if (path) |
||
577 | return path; |
||
578 | |||
579 | path = get_relative_sysroot (TOOLBINDIR); |
||
580 | if (path) |
||
581 | return path; |
||
582 | |||
583 | return TARGET_SYSTEM_ROOT; |
||
584 | } |
||
585 | |||
586 | /* We need to find any explicitly given emulation in order to initialize the |
||
587 | state that's needed by the lex&yacc argument parser (parse_args). */ |
||
588 | |||
589 | static char * |
||
590 | get_emulation (int argc, char **argv) |
||
591 | { |
||
592 | char *emulation; |
||
593 | int i; |
||
594 | |||
595 | emulation = getenv (EMULATION_ENVIRON); |
||
596 | if (emulation == NULL) |
||
597 | emulation = DEFAULT_EMULATION; |
||
598 | |||
599 | for (i = 1; i < argc; i++) |
||
600 | { |
||
601 | if (CONST_STRNEQ (argv[i], "-m")) |
||
602 | { |
||
603 | if (argv[i][2] == '\0') |
||
604 | { |
||
605 | /* -m EMUL */ |
||
606 | if (i < argc - 1) |
||
607 | { |
||
608 | emulation = argv[i + 1]; |
||
609 | i++; |
||
610 | } |
||
611 | else |
||
612 | einfo (_("%P%F: missing argument to -m\n")); |
||
613 | } |
||
614 | else if (strcmp (argv[i], "-mips1") == 0 |
||
615 | || strcmp (argv[i], "-mips2") == 0 |
||
616 | || strcmp (argv[i], "-mips3") == 0 |
||
617 | || strcmp (argv[i], "-mips4") == 0 |
||
618 | || strcmp (argv[i], "-mips5") == 0 |
||
619 | || strcmp (argv[i], "-mips32") == 0 |
||
620 | || strcmp (argv[i], "-mips32r2") == 0 |
||
6324 | serge | 621 | || strcmp (argv[i], "-mips32r6") == 0 |
5199 | serge | 622 | || strcmp (argv[i], "-mips64") == 0 |
6324 | serge | 623 | || strcmp (argv[i], "-mips64r2") == 0 |
624 | || strcmp (argv[i], "-mips64r6") == 0) |
||
5199 | serge | 625 | { |
626 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
||
627 | passed to the linker by some MIPS compilers. They |
||
628 | generally tell the linker to use a slightly different |
||
629 | library path. Perhaps someday these should be |
||
630 | implemented as emulations; until then, we just ignore |
||
631 | the arguments and hope that nobody ever creates |
||
632 | emulations named ips1, ips2 or ips3. */ |
||
633 | } |
||
634 | else if (strcmp (argv[i], "-m486") == 0) |
||
635 | { |
||
636 | /* FIXME: The argument -m486 is passed to the linker on |
||
637 | some Linux systems. Hope that nobody creates an |
||
638 | emulation named 486. */ |
||
639 | } |
||
640 | else |
||
641 | { |
||
642 | /* -mEMUL */ |
||
643 | emulation = &argv[i][2]; |
||
644 | } |
||
645 | } |
||
646 | } |
||
647 | |||
648 | return emulation; |
||
649 | } |
||
650 | |||
651 | void |
||
652 | add_ysym (const char *name) |
||
653 | { |
||
654 | if (link_info.notice_hash == NULL) |
||
655 | { |
||
656 | link_info.notice_hash = |
||
657 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); |
||
658 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
||
659 | bfd_hash_newfunc, |
||
660 | sizeof (struct bfd_hash_entry), |
||
661 | 61)) |
||
662 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
663 | } |
||
664 | |||
665 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
||
666 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
667 | } |
||
668 | |||
669 | void |
||
670 | add_ignoresym (struct bfd_link_info *info, const char *name) |
||
671 | { |
||
672 | if (info->ignore_hash == NULL) |
||
673 | { |
||
674 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); |
||
675 | if (! bfd_hash_table_init_n (info->ignore_hash, |
||
676 | bfd_hash_newfunc, |
||
677 | sizeof (struct bfd_hash_entry), |
||
678 | 61)) |
||
679 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
680 | } |
||
681 | |||
682 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) |
||
683 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
684 | } |
||
685 | |||
686 | /* Record a symbol to be wrapped, from the --wrap option. */ |
||
687 | |||
688 | void |
||
689 | add_wrap (const char *name) |
||
690 | { |
||
691 | if (link_info.wrap_hash == NULL) |
||
692 | { |
||
693 | link_info.wrap_hash = |
||
694 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); |
||
695 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
||
696 | bfd_hash_newfunc, |
||
697 | sizeof (struct bfd_hash_entry), |
||
698 | 61)) |
||
699 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
700 | } |
||
701 | |||
702 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
||
703 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
704 | } |
||
705 | |||
706 | /* Handle the -retain-symbols-file option. */ |
||
707 | |||
708 | void |
||
709 | add_keepsyms_file (const char *filename) |
||
710 | { |
||
711 | FILE *file; |
||
712 | char *buf; |
||
713 | size_t bufsize; |
||
714 | int c; |
||
715 | |||
716 | if (link_info.strip == strip_some) |
||
717 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); |
||
718 | |||
719 | file = fopen (filename, "r"); |
||
720 | if (file == NULL) |
||
721 | { |
||
722 | bfd_set_error (bfd_error_system_call); |
||
723 | einfo ("%X%P: %s: %E\n", filename); |
||
724 | return; |
||
725 | } |
||
726 | |||
727 | link_info.keep_hash = (struct bfd_hash_table *) |
||
728 | xmalloc (sizeof (struct bfd_hash_table)); |
||
729 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
||
730 | sizeof (struct bfd_hash_entry))) |
||
731 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
732 | |||
733 | bufsize = 100; |
||
734 | buf = (char *) xmalloc (bufsize); |
||
735 | |||
736 | c = getc (file); |
||
737 | while (c != EOF) |
||
738 | { |
||
739 | while (ISSPACE (c)) |
||
740 | c = getc (file); |
||
741 | |||
742 | if (c != EOF) |
||
743 | { |
||
744 | size_t len = 0; |
||
745 | |||
746 | while (! ISSPACE (c) && c != EOF) |
||
747 | { |
||
748 | buf[len] = c; |
||
749 | ++len; |
||
750 | if (len >= bufsize) |
||
751 | { |
||
752 | bufsize *= 2; |
||
753 | buf = (char *) xrealloc (buf, bufsize); |
||
754 | } |
||
755 | c = getc (file); |
||
756 | } |
||
757 | |||
758 | buf[len] = '\0'; |
||
759 | |||
760 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
||
761 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
||
762 | } |
||
763 | } |
||
764 | |||
765 | if (link_info.strip != strip_none) |
||
766 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); |
||
767 | |||
768 | free (buf); |
||
769 | link_info.strip = strip_some; |
||
6324 | serge | 770 | fclose (file); |
5199 | serge | 771 | } |
772 | |||
773 | /* Callbacks from the BFD linker routines. */ |
||
774 | |||
775 | /* This is called when BFD has decided to include an archive member in |
||
776 | a link. */ |
||
777 | |||
778 | static bfd_boolean |
||
779 | add_archive_element (struct bfd_link_info *info, |
||
780 | bfd *abfd, |
||
781 | const char *name, |
||
782 | bfd **subsbfd ATTRIBUTE_UNUSED) |
||
783 | { |
||
784 | lang_input_statement_type *input; |
||
785 | lang_input_statement_type orig_input; |
||
786 | |||
787 | input = (lang_input_statement_type *) |
||
788 | xcalloc (1, sizeof (lang_input_statement_type)); |
||
789 | input->filename = abfd->filename; |
||
790 | input->local_sym_name = abfd->filename; |
||
791 | input->the_bfd = abfd; |
||
792 | |||
793 | /* Save the original data for trace files/tries below, as plugins |
||
794 | (if enabled) may possibly alter it to point to a replacement |
||
795 | BFD, but we still want to output the original BFD filename. */ |
||
796 | orig_input = *input; |
||
797 | #ifdef ENABLE_PLUGINS |
||
6324 | serge | 798 | if (link_info.lto_plugin_active && !no_more_claiming) |
5199 | serge | 799 | { |
800 | /* We must offer this archive member to the plugins to claim. */ |
||
6324 | serge | 801 | plugin_maybe_claim (input); |
5199 | serge | 802 | if (input->flags.claimed) |
803 | { |
||
804 | input->flags.claim_archive = TRUE; |
||
805 | *subsbfd = input->the_bfd; |
||
806 | } |
||
807 | } |
||
808 | #endif /* ENABLE_PLUGINS */ |
||
809 | |||
810 | ldlang_add_file (input); |
||
811 | |||
812 | if (config.map_file != NULL) |
||
813 | { |
||
814 | static bfd_boolean header_printed; |
||
815 | struct bfd_link_hash_entry *h; |
||
816 | bfd *from; |
||
817 | int len; |
||
818 | |||
819 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
||
820 | |||
821 | if (h == NULL) |
||
822 | from = NULL; |
||
823 | else |
||
824 | { |
||
825 | switch (h->type) |
||
826 | { |
||
827 | default: |
||
828 | from = NULL; |
||
829 | break; |
||
830 | |||
831 | case bfd_link_hash_defined: |
||
832 | case bfd_link_hash_defweak: |
||
833 | from = h->u.def.section->owner; |
||
834 | break; |
||
835 | |||
836 | case bfd_link_hash_undefined: |
||
837 | case bfd_link_hash_undefweak: |
||
838 | from = h->u.undef.abfd; |
||
839 | break; |
||
840 | |||
841 | case bfd_link_hash_common: |
||
842 | from = h->u.c.p->section->owner; |
||
843 | break; |
||
844 | } |
||
845 | } |
||
846 | |||
847 | if (! header_printed) |
||
848 | { |
||
849 | char buf[100]; |
||
850 | |||
6324 | serge | 851 | sprintf (buf, _("Archive member included " |
852 | "to satisfy reference by file (symbol)\n\n")); |
||
5199 | serge | 853 | minfo ("%s", buf); |
854 | header_printed = TRUE; |
||
855 | } |
||
856 | |||
857 | if (bfd_my_archive (abfd) == NULL) |
||
858 | { |
||
859 | minfo ("%s", bfd_get_filename (abfd)); |
||
860 | len = strlen (bfd_get_filename (abfd)); |
||
861 | } |
||
862 | else |
||
863 | { |
||
864 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), |
||
865 | bfd_get_filename (abfd)); |
||
866 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) |
||
867 | + strlen (bfd_get_filename (abfd)) |
||
868 | + 2); |
||
869 | } |
||
870 | |||
871 | if (len >= 29) |
||
872 | { |
||
873 | print_nl (); |
||
874 | len = 0; |
||
875 | } |
||
876 | while (len < 30) |
||
877 | { |
||
878 | print_space (); |
||
879 | ++len; |
||
880 | } |
||
881 | |||
882 | if (from != NULL) |
||
883 | minfo ("%B ", from); |
||
884 | if (h != NULL) |
||
885 | minfo ("(%T)\n", h->root.string); |
||
886 | else |
||
887 | minfo ("(%s)\n", name); |
||
888 | } |
||
889 | |||
890 | if (trace_files || verbose) |
||
891 | info_msg ("%I\n", &orig_input); |
||
892 | return TRUE; |
||
893 | } |
||
894 | |||
895 | /* This is called when BFD has discovered a symbol which is defined |
||
896 | multiple times. */ |
||
897 | |||
898 | static bfd_boolean |
||
899 | multiple_definition (struct bfd_link_info *info, |
||
900 | struct bfd_link_hash_entry *h, |
||
901 | bfd *nbfd, |
||
902 | asection *nsec, |
||
903 | bfd_vma nval) |
||
904 | { |
||
905 | const char *name; |
||
906 | bfd *obfd; |
||
907 | asection *osec; |
||
908 | bfd_vma oval; |
||
909 | |||
910 | if (info->allow_multiple_definition) |
||
911 | return TRUE; |
||
912 | |||
913 | switch (h->type) |
||
914 | { |
||
915 | case bfd_link_hash_defined: |
||
916 | osec = h->u.def.section; |
||
917 | oval = h->u.def.value; |
||
918 | obfd = h->u.def.section->owner; |
||
919 | break; |
||
920 | case bfd_link_hash_indirect: |
||
921 | osec = bfd_ind_section_ptr; |
||
922 | oval = 0; |
||
923 | obfd = NULL; |
||
924 | break; |
||
925 | default: |
||
926 | abort (); |
||
927 | } |
||
928 | |||
929 | /* Ignore a redefinition of an absolute symbol to the |
||
930 | same value; it's harmless. */ |
||
931 | if (h->type == bfd_link_hash_defined |
||
932 | && bfd_is_abs_section (osec) |
||
933 | && bfd_is_abs_section (nsec) |
||
934 | && nval == oval) |
||
935 | return TRUE; |
||
936 | |||
937 | /* If either section has the output_section field set to |
||
938 | bfd_abs_section_ptr, it means that the section is being |
||
939 | discarded, and this is not really a multiple definition at all. |
||
940 | FIXME: It would be cleaner to somehow ignore symbols defined in |
||
941 | sections which are being discarded. */ |
||
942 | if ((osec->output_section != NULL |
||
943 | && ! bfd_is_abs_section (osec) |
||
944 | && bfd_is_abs_section (osec->output_section)) |
||
945 | || (nsec->output_section != NULL |
||
946 | && ! bfd_is_abs_section (nsec) |
||
947 | && bfd_is_abs_section (nsec->output_section))) |
||
948 | return TRUE; |
||
949 | |||
950 | name = h->root.string; |
||
951 | if (nbfd == NULL) |
||
952 | { |
||
953 | nbfd = obfd; |
||
954 | nsec = osec; |
||
955 | nval = oval; |
||
956 | obfd = NULL; |
||
957 | } |
||
958 | einfo (_("%X%C: multiple definition of `%T'\n"), |
||
959 | nbfd, nsec, nval, name); |
||
960 | if (obfd != NULL) |
||
961 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
||
962 | |||
963 | if (RELAXATION_ENABLED_BY_USER) |
||
964 | { |
||
965 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); |
||
966 | DISABLE_RELAXATION; |
||
967 | } |
||
968 | |||
969 | return TRUE; |
||
970 | } |
||
971 | |||
972 | /* This is called when there is a definition of a common symbol, or |
||
973 | when a common symbol is found for a symbol that is already defined, |
||
974 | or when two common symbols are found. We only do something if |
||
975 | -warn-common was used. */ |
||
976 | |||
977 | static bfd_boolean |
||
978 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
979 | struct bfd_link_hash_entry *h, |
||
980 | bfd *nbfd, |
||
981 | enum bfd_link_hash_type ntype, |
||
982 | bfd_vma nsize) |
||
983 | { |
||
984 | const char *name; |
||
985 | bfd *obfd; |
||
986 | enum bfd_link_hash_type otype; |
||
987 | bfd_vma osize; |
||
988 | |||
989 | if (!config.warn_common) |
||
990 | return TRUE; |
||
991 | |||
992 | name = h->root.string; |
||
993 | otype = h->type; |
||
994 | if (otype == bfd_link_hash_common) |
||
995 | { |
||
996 | obfd = h->u.c.p->section->owner; |
||
997 | osize = h->u.c.size; |
||
998 | } |
||
999 | else if (otype == bfd_link_hash_defined |
||
1000 | || otype == bfd_link_hash_defweak) |
||
1001 | { |
||
1002 | obfd = h->u.def.section->owner; |
||
1003 | osize = 0; |
||
1004 | } |
||
1005 | else |
||
1006 | { |
||
1007 | /* FIXME: It would nice if we could report the BFD which defined |
||
1008 | an indirect symbol, but we don't have anywhere to store the |
||
1009 | information. */ |
||
1010 | obfd = NULL; |
||
1011 | osize = 0; |
||
1012 | } |
||
1013 | |||
1014 | if (ntype == bfd_link_hash_defined |
||
1015 | || ntype == bfd_link_hash_defweak |
||
1016 | || ntype == bfd_link_hash_indirect) |
||
1017 | { |
||
1018 | ASSERT (otype == bfd_link_hash_common); |
||
1019 | einfo (_("%B: warning: definition of `%T' overriding common\n"), |
||
1020 | nbfd, name); |
||
1021 | if (obfd != NULL) |
||
1022 | einfo (_("%B: warning: common is here\n"), obfd); |
||
1023 | } |
||
1024 | else if (otype == bfd_link_hash_defined |
||
1025 | || otype == bfd_link_hash_defweak |
||
1026 | || otype == bfd_link_hash_indirect) |
||
1027 | { |
||
1028 | ASSERT (ntype == bfd_link_hash_common); |
||
1029 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), |
||
1030 | nbfd, name); |
||
1031 | if (obfd != NULL) |
||
1032 | einfo (_("%B: warning: defined here\n"), obfd); |
||
1033 | } |
||
1034 | else |
||
1035 | { |
||
1036 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); |
||
1037 | if (osize > nsize) |
||
1038 | { |
||
1039 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), |
||
1040 | nbfd, name); |
||
1041 | if (obfd != NULL) |
||
1042 | einfo (_("%B: warning: larger common is here\n"), obfd); |
||
1043 | } |
||
1044 | else if (nsize > osize) |
||
1045 | { |
||
1046 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), |
||
1047 | nbfd, name); |
||
1048 | if (obfd != NULL) |
||
1049 | einfo (_("%B: warning: smaller common is here\n"), obfd); |
||
1050 | } |
||
1051 | else |
||
1052 | { |
||
1053 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); |
||
1054 | if (obfd != NULL) |
||
1055 | einfo (_("%B: warning: previous common is here\n"), obfd); |
||
1056 | } |
||
1057 | } |
||
1058 | |||
1059 | return TRUE; |
||
1060 | } |
||
1061 | |||
1062 | /* This is called when BFD has discovered a set element. H is the |
||
1063 | entry in the linker hash table for the set. SECTION and VALUE |
||
1064 | represent a value which should be added to the set. */ |
||
1065 | |||
1066 | static bfd_boolean |
||
1067 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1068 | struct bfd_link_hash_entry *h, |
||
1069 | bfd_reloc_code_real_type reloc, |
||
1070 | bfd *abfd, |
||
1071 | asection *section, |
||
1072 | bfd_vma value) |
||
1073 | { |
||
1074 | if (config.warn_constructors) |
||
1075 | einfo (_("%P: warning: global constructor %s used\n"), |
||
1076 | h->root.string); |
||
1077 | |||
1078 | if (! config.build_constructors) |
||
1079 | return TRUE; |
||
1080 | |||
1081 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
||
1082 | |||
1083 | if (h->type == bfd_link_hash_new) |
||
1084 | { |
||
1085 | h->type = bfd_link_hash_undefined; |
||
1086 | h->u.undef.abfd = abfd; |
||
1087 | /* We don't call bfd_link_add_undef to add this to the list of |
||
1088 | undefined symbols because we are going to define it |
||
1089 | ourselves. */ |
||
1090 | } |
||
1091 | |||
1092 | return TRUE; |
||
1093 | } |
||
1094 | |||
1095 | /* This is called when BFD has discovered a constructor. This is only |
||
1096 | called for some object file formats--those which do not handle |
||
1097 | constructors in some more clever fashion. This is similar to |
||
1098 | adding an element to a set, but less general. */ |
||
1099 | |||
1100 | static bfd_boolean |
||
1101 | constructor_callback (struct bfd_link_info *info, |
||
1102 | bfd_boolean constructor, |
||
1103 | const char *name, |
||
1104 | bfd *abfd, |
||
1105 | asection *section, |
||
1106 | bfd_vma value) |
||
1107 | { |
||
1108 | char *s; |
||
1109 | struct bfd_link_hash_entry *h; |
||
1110 | char set_name[1 + sizeof "__CTOR_LIST__"]; |
||
1111 | |||
1112 | if (config.warn_constructors) |
||
1113 | einfo (_("%P: warning: global constructor %s used\n"), name); |
||
1114 | |||
1115 | if (! config.build_constructors) |
||
1116 | return TRUE; |
||
1117 | |||
1118 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a |
||
1119 | useful error message. */ |
||
1120 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
||
6324 | serge | 1121 | && (bfd_link_relocatable (info) |
5199 | serge | 1122 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1123 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); |
||
1124 | |||
1125 | s = set_name; |
||
1126 | if (bfd_get_symbol_leading_char (abfd) != '\0') |
||
1127 | *s++ = bfd_get_symbol_leading_char (abfd); |
||
1128 | if (constructor) |
||
1129 | strcpy (s, "__CTOR_LIST__"); |
||
1130 | else |
||
1131 | strcpy (s, "__DTOR_LIST__"); |
||
1132 | |||
1133 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
||
1134 | if (h == (struct bfd_link_hash_entry *) NULL) |
||
1135 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); |
||
1136 | if (h->type == bfd_link_hash_new) |
||
1137 | { |
||
1138 | h->type = bfd_link_hash_undefined; |
||
1139 | h->u.undef.abfd = abfd; |
||
1140 | /* We don't call bfd_link_add_undef to add this to the list of |
||
1141 | undefined symbols because we are going to define it |
||
1142 | ourselves. */ |
||
1143 | } |
||
1144 | |||
1145 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); |
||
1146 | return TRUE; |
||
1147 | } |
||
1148 | |||
1149 | /* A structure used by warning_callback to pass information through |
||
1150 | bfd_map_over_sections. */ |
||
1151 | |||
1152 | struct warning_callback_info |
||
1153 | { |
||
1154 | bfd_boolean found; |
||
1155 | const char *warning; |
||
1156 | const char *symbol; |
||
1157 | asymbol **asymbols; |
||
1158 | }; |
||
1159 | |||
6324 | serge | 1160 | /* Look through the relocs to see if we can find a plausible address |
1161 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ |
||
1162 | |||
1163 | static bfd_boolean |
||
1164 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) |
||
1165 | { |
||
1166 | struct warning_callback_info cinfo; |
||
1167 | |||
1168 | if (!bfd_generic_link_read_symbols (abfd)) |
||
1169 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); |
||
1170 | |||
1171 | cinfo.found = FALSE; |
||
1172 | cinfo.warning = warning; |
||
1173 | cinfo.symbol = symbol; |
||
1174 | cinfo.asymbols = bfd_get_outsymbols (abfd); |
||
1175 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); |
||
1176 | return cinfo.found; |
||
1177 | } |
||
1178 | |||
5199 | serge | 1179 | /* This is called when there is a reference to a warning symbol. */ |
1180 | |||
1181 | static bfd_boolean |
||
1182 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1183 | const char *warning, |
||
1184 | const char *symbol, |
||
1185 | bfd *abfd, |
||
1186 | asection *section, |
||
1187 | bfd_vma address) |
||
1188 | { |
||
1189 | /* This is a hack to support warn_multiple_gp. FIXME: This should |
||
1190 | have a cleaner interface, but what? */ |
||
1191 | if (! config.warn_multiple_gp |
||
1192 | && strcmp (warning, "using multiple gp values") == 0) |
||
1193 | return TRUE; |
||
1194 | |||
1195 | if (section != NULL) |
||
1196 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
||
1197 | else if (abfd == NULL) |
||
1198 | einfo ("%P: %s%s\n", _("warning: "), warning); |
||
1199 | else if (symbol == NULL) |
||
1200 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
||
6324 | serge | 1201 | else if (! symbol_warning (warning, symbol, abfd)) |
5199 | serge | 1202 | { |
6324 | serge | 1203 | bfd *b; |
1204 | /* Search all input files for a reference to SYMBOL. */ |
||
1205 | for (b = info->input_bfds; b; b = b->link.next) |
||
1206 | if (b != abfd && symbol_warning (warning, symbol, b)) |
||
1207 | return TRUE; |
||
5199 | serge | 1208 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
1209 | } |
||
1210 | |||
1211 | return TRUE; |
||
1212 | } |
||
1213 | |||
1214 | /* This is called by warning_callback for each section. It checks the |
||
1215 | relocs of the section to see if it can find a reference to the |
||
1216 | symbol which triggered the warning. If it can, it uses the reloc |
||
1217 | to give an error message with a file and line number. */ |
||
1218 | |||
1219 | static void |
||
1220 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
||
1221 | { |
||
1222 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
||
1223 | long relsize; |
||
1224 | arelent **relpp; |
||
1225 | long relcount; |
||
1226 | arelent **p, **pend; |
||
1227 | |||
1228 | if (info->found) |
||
1229 | return; |
||
1230 | |||
1231 | relsize = bfd_get_reloc_upper_bound (abfd, sec); |
||
1232 | if (relsize < 0) |
||
1233 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
||
1234 | if (relsize == 0) |
||
1235 | return; |
||
1236 | |||
1237 | relpp = (arelent **) xmalloc (relsize); |
||
1238 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
||
1239 | if (relcount < 0) |
||
1240 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
||
1241 | |||
1242 | p = relpp; |
||
1243 | pend = p + relcount; |
||
1244 | for (; p < pend && *p != NULL; p++) |
||
1245 | { |
||
1246 | arelent *q = *p; |
||
1247 | |||
1248 | if (q->sym_ptr_ptr != NULL |
||
1249 | && *q->sym_ptr_ptr != NULL |
||
1250 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) |
||
1251 | { |
||
1252 | /* We found a reloc for the symbol we are looking for. */ |
||
1253 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
||
1254 | info->warning); |
||
1255 | info->found = TRUE; |
||
1256 | break; |
||
1257 | } |
||
1258 | } |
||
1259 | |||
1260 | free (relpp); |
||
1261 | } |
||
1262 | |||
1263 | /* This is called when an undefined symbol is found. */ |
||
1264 | |||
1265 | static bfd_boolean |
||
1266 | undefined_symbol (struct bfd_link_info *info, |
||
1267 | const char *name, |
||
1268 | bfd *abfd, |
||
1269 | asection *section, |
||
1270 | bfd_vma address, |
||
1271 | bfd_boolean error) |
||
1272 | { |
||
1273 | static char *error_name; |
||
1274 | static unsigned int error_count; |
||
1275 | |||
1276 | #define MAX_ERRORS_IN_A_ROW 5 |
||
1277 | |||
1278 | if (info->ignore_hash != NULL |
||
1279 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) |
||
1280 | return TRUE; |
||
1281 | |||
1282 | if (config.warn_once) |
||
1283 | { |
||
1284 | /* Only warn once about a particular undefined symbol. */ |
||
1285 | add_ignoresym (info, name); |
||
1286 | } |
||
1287 | |||
1288 | /* We never print more than a reasonable number of errors in a row |
||
1289 | for a single symbol. */ |
||
1290 | if (error_name != NULL |
||
1291 | && strcmp (name, error_name) == 0) |
||
1292 | ++error_count; |
||
1293 | else |
||
1294 | { |
||
1295 | error_count = 0; |
||
1296 | if (error_name != NULL) |
||
1297 | free (error_name); |
||
1298 | error_name = xstrdup (name); |
||
1299 | } |
||
1300 | |||
1301 | if (section != NULL) |
||
1302 | { |
||
1303 | if (error_count < MAX_ERRORS_IN_A_ROW) |
||
1304 | { |
||
1305 | if (error) |
||
1306 | einfo (_("%X%C: undefined reference to `%T'\n"), |
||
1307 | abfd, section, address, name); |
||
1308 | else |
||
1309 | einfo (_("%C: warning: undefined reference to `%T'\n"), |
||
1310 | abfd, section, address, name); |
||
1311 | } |
||
1312 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
||
1313 | { |
||
1314 | if (error) |
||
1315 | einfo (_("%X%D: more undefined references to `%T' follow\n"), |
||
1316 | abfd, section, address, name); |
||
1317 | else |
||
1318 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), |
||
1319 | abfd, section, address, name); |
||
1320 | } |
||
1321 | else if (error) |
||
1322 | einfo ("%X"); |
||
1323 | } |
||
1324 | else |
||
1325 | { |
||
1326 | if (error_count < MAX_ERRORS_IN_A_ROW) |
||
1327 | { |
||
1328 | if (error) |
||
1329 | einfo (_("%X%B: undefined reference to `%T'\n"), |
||
1330 | abfd, name); |
||
1331 | else |
||
1332 | einfo (_("%B: warning: undefined reference to `%T'\n"), |
||
1333 | abfd, name); |
||
1334 | } |
||
1335 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
||
1336 | { |
||
1337 | if (error) |
||
1338 | einfo (_("%X%B: more undefined references to `%T' follow\n"), |
||
1339 | abfd, name); |
||
1340 | else |
||
1341 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), |
||
1342 | abfd, name); |
||
1343 | } |
||
1344 | else if (error) |
||
1345 | einfo ("%X"); |
||
1346 | } |
||
1347 | |||
1348 | return TRUE; |
||
1349 | } |
||
1350 | |||
1351 | /* Counter to limit the number of relocation overflow error messages |
||
1352 | to print. Errors are printed as it is decremented. When it's |
||
1353 | called and the counter is zero, a final message is printed |
||
1354 | indicating more relocations were omitted. When it gets to -1, no |
||
1355 | such errors are printed. If it's initially set to a value less |
||
1356 | than -1, all such errors will be printed (--verbose does this). */ |
||
1357 | |||
1358 | int overflow_cutoff_limit = 10; |
||
1359 | |||
1360 | /* This is called when a reloc overflows. */ |
||
1361 | |||
1362 | static bfd_boolean |
||
1363 | reloc_overflow (struct bfd_link_info *info, |
||
1364 | struct bfd_link_hash_entry *entry, |
||
1365 | const char *name, |
||
1366 | const char *reloc_name, |
||
1367 | bfd_vma addend, |
||
1368 | bfd *abfd, |
||
1369 | asection *section, |
||
1370 | bfd_vma address) |
||
1371 | { |
||
1372 | if (overflow_cutoff_limit == -1) |
||
1373 | return TRUE; |
||
1374 | |||
1375 | einfo ("%X%H:", abfd, section, address); |
||
1376 | |||
1377 | if (overflow_cutoff_limit >= 0 |
||
1378 | && overflow_cutoff_limit-- == 0) |
||
1379 | { |
||
1380 | einfo (_(" additional relocation overflows omitted from the output\n")); |
||
1381 | return TRUE; |
||
1382 | } |
||
1383 | |||
1384 | if (entry) |
||
1385 | { |
||
1386 | while (entry->type == bfd_link_hash_indirect |
||
1387 | || entry->type == bfd_link_hash_warning) |
||
1388 | entry = entry->u.i.link; |
||
1389 | switch (entry->type) |
||
1390 | { |
||
1391 | case bfd_link_hash_undefined: |
||
1392 | case bfd_link_hash_undefweak: |
||
1393 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), |
||
1394 | reloc_name, entry->root.string); |
||
1395 | break; |
||
1396 | case bfd_link_hash_defined: |
||
1397 | case bfd_link_hash_defweak: |
||
1398 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), |
||
1399 | reloc_name, entry->root.string, |
||
1400 | entry->u.def.section, |
||
1401 | entry->u.def.section == bfd_abs_section_ptr |
||
1402 | ? info->output_bfd : entry->u.def.section->owner); |
||
1403 | break; |
||
1404 | default: |
||
1405 | abort (); |
||
1406 | break; |
||
1407 | } |
||
1408 | } |
||
1409 | else |
||
1410 | einfo (_(" relocation truncated to fit: %s against `%T'"), |
||
1411 | reloc_name, name); |
||
1412 | if (addend != 0) |
||
1413 | einfo ("+%v", addend); |
||
1414 | einfo ("\n"); |
||
1415 | return TRUE; |
||
1416 | } |
||
1417 | |||
1418 | /* This is called when a dangerous relocation is made. */ |
||
1419 | |||
1420 | static bfd_boolean |
||
1421 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1422 | const char *message, |
||
1423 | bfd *abfd, |
||
1424 | asection *section, |
||
1425 | bfd_vma address) |
||
1426 | { |
||
1427 | einfo (_("%X%H: dangerous relocation: %s\n"), |
||
1428 | abfd, section, address, message); |
||
1429 | return TRUE; |
||
1430 | } |
||
1431 | |||
1432 | /* This is called when a reloc is being generated attached to a symbol |
||
1433 | that is not being output. */ |
||
1434 | |||
1435 | static bfd_boolean |
||
1436 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1437 | const char *name, |
||
1438 | bfd *abfd, |
||
1439 | asection *section, |
||
1440 | bfd_vma address) |
||
1441 | { |
||
1442 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
||
1443 | abfd, section, address, name); |
||
1444 | return TRUE; |
||
1445 | } |
||
1446 | |||
1447 | /* This is called if link_info.notice_all is set, or when a symbol in |
||
1448 | link_info.notice_hash is found. Symbols are put in notice_hash |
||
1449 | using the -y option, while notice_all is set if the --cref option |
||
1450 | has been supplied, or if there are any NOCROSSREFS sections in the |
||
1451 | linker script; and if plugins are active, since they need to monitor |
||
1452 | all references from non-IR files. */ |
||
1453 | |||
1454 | static bfd_boolean |
||
1455 | notice (struct bfd_link_info *info, |
||
1456 | struct bfd_link_hash_entry *h, |
||
6324 | serge | 1457 | struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, |
5199 | serge | 1458 | bfd *abfd, |
1459 | asection *section, |
||
1460 | bfd_vma value, |
||
6324 | serge | 1461 | flagword flags ATTRIBUTE_UNUSED) |
5199 | serge | 1462 | { |
1463 | const char *name; |
||
1464 | |||
1465 | if (h == NULL) |
||
1466 | { |
||
1467 | if (command_line.cref || nocrossref_list != NULL) |
||
1468 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
||
1469 | return TRUE; |
||
1470 | } |
||
1471 | |||
1472 | name = h->root.string; |
||
1473 | if (info->notice_hash != NULL |
||
1474 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
||
1475 | { |
||
1476 | if (bfd_is_und_section (section)) |
||
1477 | einfo ("%B: reference to %s\n", abfd, name); |
||
1478 | else |
||
1479 | einfo ("%B: definition of %s\n", abfd, name); |
||
1480 | } |
||
1481 | |||
1482 | if (command_line.cref || nocrossref_list != NULL) |
||
1483 | add_cref (name, abfd, section, value); |
||
1484 | |||
1485 | return TRUE; |
||
1486 | }>>>>>>>>>> |