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Rev | Author | Line No. | Line |
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5199 | serge | 1 | /* Main program of GNU linker. |
2 | Copyright 1991-2013 Free Software Foundation, Inc. |
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3 | Written by Steve Chamberlain steve@cygnus.com |
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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 | #include "libbfd.h" |
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45 | #endif /* ENABLE_PLUGINS */ |
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46 | |||
47 | /* Somewhere above, sys/stat.h got included. */ |
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48 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
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49 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) |
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50 | #endif |
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51 | |||
52 | #include |
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53 | |||
54 | #ifdef HAVE_SBRK |
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55 | #if !HAVE_DECL_SBRK |
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56 | extern void *sbrk (); |
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57 | #endif |
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58 | #endif |
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59 | |||
60 | #ifndef TARGET_SYSTEM_ROOT |
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61 | #define TARGET_SYSTEM_ROOT "" |
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62 | #endif |
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63 | |||
64 | /* EXPORTS */ |
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65 | |||
66 | FILE *saved_script_handle = NULL; |
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67 | FILE *previous_script_handle = NULL; |
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68 | bfd_boolean force_make_executable = FALSE; |
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69 | |||
70 | char *default_target; |
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71 | const char *output_filename = "a.out"; |
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72 | |||
73 | /* Name this program was invoked by. */ |
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74 | char *program_name; |
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75 | |||
76 | /* The prefix for system library directories. */ |
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77 | const char *ld_sysroot; |
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78 | |||
79 | /* The canonical representation of ld_sysroot. */ |
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80 | char * ld_canon_sysroot; |
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81 | int ld_canon_sysroot_len; |
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82 | |||
83 | /* Set by -G argument, for targets like MIPS ELF. */ |
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84 | int g_switch_value = 8; |
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85 | |||
86 | /* Nonzero means print names of input files as processed. */ |
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87 | bfd_boolean trace_files; |
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88 | |||
89 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
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90 | bfd_boolean verbose; |
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91 | |||
92 | /* Nonzero means version number was printed, so exit successfully |
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93 | instead of complaining if no input files are given. */ |
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94 | bfd_boolean version_printed; |
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95 | |||
96 | /* TRUE if we should demangle symbol names. */ |
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97 | bfd_boolean demangling; |
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98 | |||
99 | args_type command_line; |
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100 | |||
101 | ld_config_type config; |
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102 | |||
103 | sort_type sort_section; |
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104 | |||
105 | static const char *get_sysroot |
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106 | (int, char **); |
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107 | static char *get_emulation |
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108 | (int, char **); |
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109 | static bfd_boolean add_archive_element |
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110 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
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111 | static bfd_boolean multiple_definition |
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112 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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113 | bfd *, asection *, bfd_vma); |
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114 | static bfd_boolean multiple_common |
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115 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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116 | bfd *, enum bfd_link_hash_type, bfd_vma); |
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117 | static bfd_boolean add_to_set |
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118 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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119 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); |
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120 | static bfd_boolean constructor_callback |
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121 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
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122 | asection *, bfd_vma); |
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123 | static bfd_boolean warning_callback |
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124 | (struct bfd_link_info *, const char *, const char *, bfd *, |
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125 | asection *, bfd_vma); |
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126 | static void warning_find_reloc |
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127 | (bfd *, asection *, void *); |
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128 | static bfd_boolean undefined_symbol |
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129 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
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130 | bfd_boolean); |
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131 | static bfd_boolean reloc_overflow |
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132 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
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133 | const char *, bfd_vma, bfd *, asection *, bfd_vma); |
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134 | static bfd_boolean reloc_dangerous |
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135 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
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136 | static bfd_boolean unattached_reloc |
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137 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
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138 | static bfd_boolean notice |
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139 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
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140 | bfd *, asection *, bfd_vma, flagword, const char *); |
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141 | |||
142 | static struct bfd_link_callbacks link_callbacks = |
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143 | { |
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144 | add_archive_element, |
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145 | multiple_definition, |
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146 | multiple_common, |
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147 | add_to_set, |
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148 | constructor_callback, |
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149 | warning_callback, |
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150 | undefined_symbol, |
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151 | reloc_overflow, |
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152 | reloc_dangerous, |
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153 | unattached_reloc, |
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154 | notice, |
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155 | einfo, |
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156 | info_msg, |
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157 | minfo, |
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158 | ldlang_override_segment_assignment |
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159 | }; |
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160 | |||
161 | static bfd_assert_handler_type default_bfd_assert_handler; |
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162 | |||
163 | struct bfd_link_info link_info; |
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164 | |||
165 | static void |
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166 | ld_cleanup (void) |
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167 | { |
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168 | bfd_cache_close_all (); |
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169 | #ifdef ENABLE_PLUGINS |
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170 | plugin_call_cleanup (); |
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171 | #endif |
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172 | if (output_filename && delete_output_file_on_failure) |
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173 | unlink_if_ordinary (output_filename); |
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174 | } |
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175 | |||
176 | /* If there's a BFD assertion, we'll notice and exit with an error |
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177 | unless otherwise instructed. */ |
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178 | |||
179 | static void |
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180 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, |
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181 | const char *file, int line) |
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182 | { |
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183 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); |
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184 | config.make_executable = FALSE; |
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185 | } |
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186 | |||
187 | int |
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188 | main (int argc, char **argv) |
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189 | { |
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190 | char *emulation; |
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191 | long start_time = get_run_time (); |
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192 | #ifdef HAVE_SBRK |
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193 | char *start_sbrk = (char *) sbrk (0); |
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194 | #endif |
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195 | |||
196 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
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197 | setlocale (LC_MESSAGES, ""); |
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198 | #endif |
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199 | #if defined (HAVE_SETLOCALE) |
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200 | setlocale (LC_CTYPE, ""); |
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201 | #endif |
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202 | bindtextdomain (PACKAGE, LOCALEDIR); |
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203 | textdomain (PACKAGE); |
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204 | |||
205 | program_name = argv[0]; |
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206 | xmalloc_set_program_name (program_name); |
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207 | |||
208 | START_PROGRESS (program_name, 0); |
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209 | |||
210 | expandargv (&argc, &argv); |
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211 | |||
212 | bfd_init (); |
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213 | |||
214 | bfd_set_error_program_name (program_name); |
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215 | |||
216 | /* We want to notice and fail on those nasty BFD assertions which are |
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217 | likely to signal incorrect output being generated but otherwise may |
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218 | leave no trace. */ |
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219 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); |
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220 | |||
221 | xatexit (ld_cleanup); |
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222 | |||
223 | /* Set up the sysroot directory. */ |
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224 | ld_sysroot = get_sysroot (argc, argv); |
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225 | if (*ld_sysroot) |
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226 | { |
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227 | if (*TARGET_SYSTEM_ROOT == 0) |
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228 | { |
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229 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
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230 | ld_sysroot = ""; |
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231 | } |
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232 | else |
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233 | ld_canon_sysroot = lrealpath (ld_sysroot); |
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234 | } |
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235 | if (ld_canon_sysroot) |
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236 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); |
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237 | else |
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238 | ld_canon_sysroot_len = -1; |
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239 | |||
240 | /* Set the default BFD target based on the configured target. Doing |
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241 | this permits the linker to be configured for a particular target, |
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242 | and linked against a shared BFD library which was configured for |
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243 | a different target. The macro TARGET is defined by Makefile. */ |
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244 | if (! bfd_set_default_target (TARGET)) |
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245 | { |
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246 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); |
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247 | xexit (1); |
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248 | } |
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249 | |||
250 | #if YYDEBUG |
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251 | { |
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252 | extern int yydebug; |
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253 | yydebug = 1; |
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254 | } |
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255 | #endif |
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256 | |||
257 | config.build_constructors = TRUE; |
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258 | config.rpath_separator = ':'; |
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259 | config.split_by_reloc = (unsigned) -1; |
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260 | config.split_by_file = (bfd_size_type) -1; |
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261 | config.make_executable = TRUE; |
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262 | config.magic_demand_paged = TRUE; |
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263 | config.text_read_only = TRUE; |
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264 | link_info.disable_target_specific_optimizations = -1; |
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265 | |||
266 | command_line.warn_mismatch = TRUE; |
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267 | command_line.warn_search_mismatch = TRUE; |
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268 | command_line.check_section_addresses = -1; |
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269 | |||
270 | /* We initialize DEMANGLING based on the environment variable |
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271 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the |
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272 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the |
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273 | environment. Acting the same way here lets us provide the same |
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274 | interface by default. */ |
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275 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; |
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276 | |||
277 | link_info.allow_undefined_version = TRUE; |
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278 | link_info.keep_memory = TRUE; |
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279 | link_info.combreloc = TRUE; |
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280 | link_info.strip_discarded = TRUE; |
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281 | link_info.emit_hash = TRUE; |
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282 | link_info.callbacks = &link_callbacks; |
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283 | link_info.input_bfds_tail = &link_info.input_bfds; |
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284 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
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285 | and _fini symbols. We are compatible. */ |
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286 | link_info.init_function = "_init"; |
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287 | link_info.fini_function = "_fini"; |
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288 | link_info.relax_pass = 1; |
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289 | link_info.pei386_auto_import = -1; |
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290 | link_info.spare_dynamic_tags = 5; |
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291 | link_info.path_separator = ':'; |
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292 | |||
293 | ldfile_add_arch (""); |
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294 | emulation = get_emulation (argc, argv); |
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295 | ldemul_choose_mode (emulation); |
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296 | default_target = ldemul_choose_target (argc, argv); |
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297 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
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298 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); |
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299 | lang_init (); |
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300 | ldemul_before_parse (); |
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301 | lang_has_input_file = FALSE; |
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302 | parse_args (argc, argv); |
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303 | |||
304 | if (config.hash_table_size != 0) |
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305 | bfd_hash_set_default_size (config.hash_table_size); |
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306 | |||
307 | #ifdef ENABLE_PLUGINS |
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308 | /* Now all the plugin arguments have been gathered, we can load them. */ |
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309 | plugin_load_plugins (); |
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310 | #endif /* ENABLE_PLUGINS */ |
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311 | |||
312 | ldemul_set_symbols (); |
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313 | |||
314 | /* If we have not already opened and parsed a linker script, |
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315 | try the default script from command line first. */ |
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316 | if (saved_script_handle == NULL |
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317 | && command_line.default_script != NULL) |
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318 | { |
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319 | ldfile_open_command_file (command_line.default_script); |
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320 | parser_input = input_script; |
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321 | yyparse (); |
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322 | } |
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323 | |||
324 | /* If we have not already opened and parsed a linker script |
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325 | read the emulation's appropriate default script. */ |
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326 | if (saved_script_handle == NULL) |
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327 | { |
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328 | int isfile; |
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329 | char *s = ldemul_get_script (&isfile); |
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330 | |||
331 | if (isfile) |
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332 | ldfile_open_default_command_file (s); |
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333 | else |
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334 | { |
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335 | lex_string = s; |
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336 | lex_redirect (s, _("built in linker script"), 1); |
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337 | } |
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338 | parser_input = input_script; |
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339 | yyparse (); |
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340 | lex_string = NULL; |
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341 | } |
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342 | |||
343 | if (verbose) |
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344 | { |
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345 | if (saved_script_handle) |
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346 | info_msg (_("using external linker script:")); |
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347 | else |
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348 | info_msg (_("using internal linker script:")); |
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349 | info_msg ("\n==================================================\n"); |
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350 | |||
351 | if (saved_script_handle) |
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352 | { |
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353 | static const int ld_bufsz = 8193; |
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354 | size_t n; |
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355 | char *buf = (char *) xmalloc (ld_bufsz); |
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356 | |||
357 | rewind (saved_script_handle); |
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358 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
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359 | { |
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360 | buf[n] = 0; |
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361 | info_msg (buf); |
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362 | } |
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363 | rewind (saved_script_handle); |
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364 | free (buf); |
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365 | } |
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366 | else |
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367 | { |
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368 | int isfile; |
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369 | |||
370 | info_msg (ldemul_get_script (&isfile)); |
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371 | } |
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372 | |||
373 | info_msg ("\n==================================================\n"); |
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374 | } |
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375 | |||
376 | if (command_line.print_output_format) |
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377 | info_msg ("%s\n", lang_get_output_target ()); |
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378 | |||
379 | lang_final (); |
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380 | |||
381 | if (!lang_has_input_file) |
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382 | { |
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383 | if (version_printed || command_line.print_output_format) |
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384 | xexit (0); |
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385 | einfo (_("%P%F: no input files\n")); |
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386 | } |
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387 | |||
388 | if (trace_files) |
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389 | info_msg (_("%P: mode %s\n"), emulation); |
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390 | |||
391 | ldemul_after_parse (); |
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392 | |||
393 | if (config.map_filename) |
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394 | { |
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395 | if (strcmp (config.map_filename, "-") == 0) |
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396 | { |
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397 | config.map_file = stdout; |
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398 | } |
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399 | else |
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400 | { |
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401 | config.map_file = fopen (config.map_filename, FOPEN_WT); |
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402 | if (config.map_file == (FILE *) NULL) |
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403 | { |
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404 | bfd_set_error (bfd_error_system_call); |
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405 | einfo (_("%P%F: cannot open map file %s: %E\n"), |
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406 | config.map_filename); |
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407 | } |
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408 | } |
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409 | } |
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410 | |||
411 | lang_process (); |
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412 | |||
413 | /* Print error messages for any missing symbols, for any warning |
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414 | symbols, and possibly multiple definitions. */ |
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415 | if (link_info.relocatable) |
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416 | link_info.output_bfd->flags &= ~EXEC_P; |
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417 | else |
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418 | link_info.output_bfd->flags |= EXEC_P; |
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419 | |||
420 | ldwrite (); |
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421 | |||
422 | if (config.map_file != NULL) |
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423 | lang_map (); |
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424 | if (command_line.cref) |
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425 | output_cref (config.map_file != NULL ? config.map_file : stdout); |
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426 | if (nocrossref_list != NULL) |
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427 | check_nocrossrefs (); |
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428 | |||
429 | lang_finish (); |
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430 | |||
431 | /* Even if we're producing relocatable output, some non-fatal errors should |
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432 | be reported in the exit status. (What non-fatal errors, if any, do we |
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433 | want to ignore for relocatable output?) */ |
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434 | if (!config.make_executable && !force_make_executable) |
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435 | { |
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436 | if (trace_files) |
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437 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
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438 | output_filename); |
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439 | |||
440 | /* The file will be removed by ld_cleanup. */ |
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441 | xexit (1); |
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442 | } |
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443 | else |
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444 | { |
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445 | if (! bfd_close (link_info.output_bfd)) |
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446 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); |
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447 | |||
448 | /* If the --force-exe-suffix is enabled, and we're making an |
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449 | executable file and it doesn't end in .exe, copy it to one |
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450 | which does. */ |
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451 | if (! link_info.relocatable && command_line.force_exe_suffix) |
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452 | { |
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453 | int len = strlen (output_filename); |
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454 | |||
455 | if (len < 4 |
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456 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
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457 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) |
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458 | { |
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459 | FILE *src; |
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460 | FILE *dst; |
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461 | const int bsize = 4096; |
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462 | char *buf = (char *) xmalloc (bsize); |
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463 | int l; |
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464 | char *dst_name = (char *) xmalloc (len + 5); |
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465 | |||
466 | strcpy (dst_name, output_filename); |
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467 | strcat (dst_name, ".exe"); |
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468 | src = fopen (output_filename, FOPEN_RB); |
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469 | dst = fopen (dst_name, FOPEN_WB); |
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470 | |||
471 | if (!src) |
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472 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
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473 | output_filename); |
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474 | if (!dst) |
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475 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
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476 | dst_name); |
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477 | while ((l = fread (buf, 1, bsize, src)) > 0) |
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478 | { |
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479 | int done = fwrite (buf, 1, l, dst); |
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480 | |||
481 | if (done != l) |
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482 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
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483 | } |
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484 | |||
485 | fclose (src); |
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486 | if (fclose (dst) == EOF) |
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487 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
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488 | free (dst_name); |
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489 | free (buf); |
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490 | } |
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491 | } |
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492 | } |
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493 | |||
494 | END_PROGRESS (program_name); |
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495 | |||
496 | if (config.stats) |
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497 | { |
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498 | #ifdef HAVE_SBRK |
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499 | char *lim = (char *) sbrk (0); |
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500 | #endif |
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501 | long run_time = get_run_time () - start_time; |
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502 | |||
503 | fflush (stdout); |
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504 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
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505 | program_name, run_time / 1000000, run_time % 1000000); |
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506 | #ifdef HAVE_SBRK |
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507 | fprintf (stderr, _("%s: data size %ld\n"), program_name, |
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508 | (long) (lim - start_sbrk)); |
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509 | #endif |
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510 | fflush (stderr); |
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511 | } |
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512 | |||
513 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
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514 | output_filename = NULL; |
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515 | |||
516 | xexit (0); |
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517 | return 0; |
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518 | } |
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519 | |||
520 | /* If the configured sysroot is relocatable, try relocating it based on |
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521 | default prefix FROM. Return the relocated directory if it exists, |
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522 | otherwise return null. */ |
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523 | |||
524 | static char * |
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525 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) |
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526 | { |
||
527 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE |
||
528 | char *path; |
||
529 | struct stat s; |
||
530 | |||
531 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); |
||
532 | if (path) |
||
533 | { |
||
534 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) |
||
535 | return path; |
||
536 | free (path); |
||
537 | } |
||
538 | #endif |
||
539 | return 0; |
||
540 | } |
||
541 | |||
542 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ |
||
543 | |||
544 | static const char * |
||
545 | get_sysroot (int argc, char **argv) |
||
546 | { |
||
547 | int i; |
||
548 | const char *path; |
||
549 | |||
550 | for (i = 1; i < argc; i++) |
||
551 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
||
552 | return argv[i] + strlen ("--sysroot="); |
||
553 | |||
554 | path = get_relative_sysroot (BINDIR); |
||
555 | if (path) |
||
556 | return path; |
||
557 | |||
558 | path = get_relative_sysroot (TOOLBINDIR); |
||
559 | if (path) |
||
560 | return path; |
||
561 | |||
562 | return TARGET_SYSTEM_ROOT; |
||
563 | } |
||
564 | |||
565 | /* We need to find any explicitly given emulation in order to initialize the |
||
566 | state that's needed by the lex&yacc argument parser (parse_args). */ |
||
567 | |||
568 | static char * |
||
569 | get_emulation (int argc, char **argv) |
||
570 | { |
||
571 | char *emulation; |
||
572 | int i; |
||
573 | |||
574 | emulation = getenv (EMULATION_ENVIRON); |
||
575 | if (emulation == NULL) |
||
576 | emulation = DEFAULT_EMULATION; |
||
577 | |||
578 | for (i = 1; i < argc; i++) |
||
579 | { |
||
580 | if (CONST_STRNEQ (argv[i], "-m")) |
||
581 | { |
||
582 | if (argv[i][2] == '\0') |
||
583 | { |
||
584 | /* -m EMUL */ |
||
585 | if (i < argc - 1) |
||
586 | { |
||
587 | emulation = argv[i + 1]; |
||
588 | i++; |
||
589 | } |
||
590 | else |
||
591 | einfo (_("%P%F: missing argument to -m\n")); |
||
592 | } |
||
593 | else if (strcmp (argv[i], "-mips1") == 0 |
||
594 | || strcmp (argv[i], "-mips2") == 0 |
||
595 | || strcmp (argv[i], "-mips3") == 0 |
||
596 | || strcmp (argv[i], "-mips4") == 0 |
||
597 | || strcmp (argv[i], "-mips5") == 0 |
||
598 | || strcmp (argv[i], "-mips32") == 0 |
||
599 | || strcmp (argv[i], "-mips32r2") == 0 |
||
600 | || strcmp (argv[i], "-mips64") == 0 |
||
601 | || strcmp (argv[i], "-mips64r2") == 0) |
||
602 | { |
||
603 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
||
604 | passed to the linker by some MIPS compilers. They |
||
605 | generally tell the linker to use a slightly different |
||
606 | library path. Perhaps someday these should be |
||
607 | implemented as emulations; until then, we just ignore |
||
608 | the arguments and hope that nobody ever creates |
||
609 | emulations named ips1, ips2 or ips3. */ |
||
610 | } |
||
611 | else if (strcmp (argv[i], "-m486") == 0) |
||
612 | { |
||
613 | /* FIXME: The argument -m486 is passed to the linker on |
||
614 | some Linux systems. Hope that nobody creates an |
||
615 | emulation named 486. */ |
||
616 | } |
||
617 | else |
||
618 | { |
||
619 | /* -mEMUL */ |
||
620 | emulation = &argv[i][2]; |
||
621 | } |
||
622 | } |
||
623 | } |
||
624 | |||
625 | return emulation; |
||
626 | } |
||
627 | |||
628 | void |
||
629 | add_ysym (const char *name) |
||
630 | { |
||
631 | if (link_info.notice_hash == NULL) |
||
632 | { |
||
633 | link_info.notice_hash = |
||
634 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); |
||
635 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
||
636 | bfd_hash_newfunc, |
||
637 | sizeof (struct bfd_hash_entry), |
||
638 | 61)) |
||
639 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
640 | } |
||
641 | |||
642 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
||
643 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
644 | } |
||
645 | |||
646 | void |
||
647 | add_ignoresym (struct bfd_link_info *info, const char *name) |
||
648 | { |
||
649 | if (info->ignore_hash == NULL) |
||
650 | { |
||
651 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); |
||
652 | if (! bfd_hash_table_init_n (info->ignore_hash, |
||
653 | bfd_hash_newfunc, |
||
654 | sizeof (struct bfd_hash_entry), |
||
655 | 61)) |
||
656 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
657 | } |
||
658 | |||
659 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) |
||
660 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
661 | } |
||
662 | |||
663 | /* Record a symbol to be wrapped, from the --wrap option. */ |
||
664 | |||
665 | void |
||
666 | add_wrap (const char *name) |
||
667 | { |
||
668 | if (link_info.wrap_hash == NULL) |
||
669 | { |
||
670 | link_info.wrap_hash = |
||
671 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); |
||
672 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
||
673 | bfd_hash_newfunc, |
||
674 | sizeof (struct bfd_hash_entry), |
||
675 | 61)) |
||
676 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
677 | } |
||
678 | |||
679 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
||
680 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
||
681 | } |
||
682 | |||
683 | /* Handle the -retain-symbols-file option. */ |
||
684 | |||
685 | void |
||
686 | add_keepsyms_file (const char *filename) |
||
687 | { |
||
688 | FILE *file; |
||
689 | char *buf; |
||
690 | size_t bufsize; |
||
691 | int c; |
||
692 | |||
693 | if (link_info.strip == strip_some) |
||
694 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); |
||
695 | |||
696 | file = fopen (filename, "r"); |
||
697 | if (file == NULL) |
||
698 | { |
||
699 | bfd_set_error (bfd_error_system_call); |
||
700 | einfo ("%X%P: %s: %E\n", filename); |
||
701 | return; |
||
702 | } |
||
703 | |||
704 | link_info.keep_hash = (struct bfd_hash_table *) |
||
705 | xmalloc (sizeof (struct bfd_hash_table)); |
||
706 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
||
707 | sizeof (struct bfd_hash_entry))) |
||
708 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
||
709 | |||
710 | bufsize = 100; |
||
711 | buf = (char *) xmalloc (bufsize); |
||
712 | |||
713 | c = getc (file); |
||
714 | while (c != EOF) |
||
715 | { |
||
716 | while (ISSPACE (c)) |
||
717 | c = getc (file); |
||
718 | |||
719 | if (c != EOF) |
||
720 | { |
||
721 | size_t len = 0; |
||
722 | |||
723 | while (! ISSPACE (c) && c != EOF) |
||
724 | { |
||
725 | buf[len] = c; |
||
726 | ++len; |
||
727 | if (len >= bufsize) |
||
728 | { |
||
729 | bufsize *= 2; |
||
730 | buf = (char *) xrealloc (buf, bufsize); |
||
731 | } |
||
732 | c = getc (file); |
||
733 | } |
||
734 | |||
735 | buf[len] = '\0'; |
||
736 | |||
737 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
||
738 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
||
739 | } |
||
740 | } |
||
741 | |||
742 | if (link_info.strip != strip_none) |
||
743 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); |
||
744 | |||
745 | free (buf); |
||
746 | link_info.strip = strip_some; |
||
747 | } |
||
748 | |||
749 | /* Callbacks from the BFD linker routines. */ |
||
750 | |||
751 | /* This is called when BFD has decided to include an archive member in |
||
752 | a link. */ |
||
753 | |||
754 | static bfd_boolean |
||
755 | add_archive_element (struct bfd_link_info *info, |
||
756 | bfd *abfd, |
||
757 | const char *name, |
||
758 | bfd **subsbfd ATTRIBUTE_UNUSED) |
||
759 | { |
||
760 | lang_input_statement_type *input; |
||
761 | lang_input_statement_type orig_input; |
||
762 | |||
763 | input = (lang_input_statement_type *) |
||
764 | xcalloc (1, sizeof (lang_input_statement_type)); |
||
765 | input->filename = abfd->filename; |
||
766 | input->local_sym_name = abfd->filename; |
||
767 | input->the_bfd = abfd; |
||
768 | |||
769 | /* Save the original data for trace files/tries below, as plugins |
||
770 | (if enabled) may possibly alter it to point to a replacement |
||
771 | BFD, but we still want to output the original BFD filename. */ |
||
772 | orig_input = *input; |
||
773 | #ifdef ENABLE_PLUGINS |
||
774 | if (plugin_active_plugins_p () && !no_more_claiming) |
||
775 | { |
||
776 | /* We must offer this archive member to the plugins to claim. */ |
||
777 | const char *filename = (bfd_my_archive (abfd) != NULL |
||
778 | ? bfd_my_archive (abfd)->filename : abfd->filename); |
||
779 | int fd = open (filename, O_RDONLY | O_BINARY); |
||
780 | if (fd >= 0) |
||
781 | { |
||
782 | struct ld_plugin_input_file file; |
||
783 | |||
784 | /* Offset and filesize must refer to the individual archive |
||
785 | member, not the whole file, and must exclude the header. |
||
786 | Fortunately for us, that is how the data is stored in the |
||
787 | origin field of the bfd and in the arelt_data. */ |
||
788 | file.name = filename; |
||
789 | file.offset = abfd->origin; |
||
790 | file.filesize = arelt_size (abfd); |
||
791 | file.fd = fd; |
||
792 | plugin_maybe_claim (&file, input); |
||
793 | if (input->flags.claimed) |
||
794 | { |
||
795 | input->flags.claim_archive = TRUE; |
||
796 | *subsbfd = input->the_bfd; |
||
797 | } |
||
798 | } |
||
799 | } |
||
800 | #endif /* ENABLE_PLUGINS */ |
||
801 | |||
802 | ldlang_add_file (input); |
||
803 | |||
804 | if (config.map_file != NULL) |
||
805 | { |
||
806 | static bfd_boolean header_printed; |
||
807 | struct bfd_link_hash_entry *h; |
||
808 | bfd *from; |
||
809 | int len; |
||
810 | |||
811 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
||
812 | |||
813 | if (h == NULL) |
||
814 | from = NULL; |
||
815 | else |
||
816 | { |
||
817 | switch (h->type) |
||
818 | { |
||
819 | default: |
||
820 | from = NULL; |
||
821 | break; |
||
822 | |||
823 | case bfd_link_hash_defined: |
||
824 | case bfd_link_hash_defweak: |
||
825 | from = h->u.def.section->owner; |
||
826 | break; |
||
827 | |||
828 | case bfd_link_hash_undefined: |
||
829 | case bfd_link_hash_undefweak: |
||
830 | from = h->u.undef.abfd; |
||
831 | break; |
||
832 | |||
833 | case bfd_link_hash_common: |
||
834 | from = h->u.c.p->section->owner; |
||
835 | break; |
||
836 | } |
||
837 | } |
||
838 | |||
839 | if (! header_printed) |
||
840 | { |
||
841 | char buf[100]; |
||
842 | |||
843 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
||
844 | minfo ("%s", buf); |
||
845 | header_printed = TRUE; |
||
846 | } |
||
847 | |||
848 | if (bfd_my_archive (abfd) == NULL) |
||
849 | { |
||
850 | minfo ("%s", bfd_get_filename (abfd)); |
||
851 | len = strlen (bfd_get_filename (abfd)); |
||
852 | } |
||
853 | else |
||
854 | { |
||
855 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), |
||
856 | bfd_get_filename (abfd)); |
||
857 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) |
||
858 | + strlen (bfd_get_filename (abfd)) |
||
859 | + 2); |
||
860 | } |
||
861 | |||
862 | if (len >= 29) |
||
863 | { |
||
864 | print_nl (); |
||
865 | len = 0; |
||
866 | } |
||
867 | while (len < 30) |
||
868 | { |
||
869 | print_space (); |
||
870 | ++len; |
||
871 | } |
||
872 | |||
873 | if (from != NULL) |
||
874 | minfo ("%B ", from); |
||
875 | if (h != NULL) |
||
876 | minfo ("(%T)\n", h->root.string); |
||
877 | else |
||
878 | minfo ("(%s)\n", name); |
||
879 | } |
||
880 | |||
881 | if (trace_files || verbose) |
||
882 | info_msg ("%I\n", &orig_input); |
||
883 | return TRUE; |
||
884 | } |
||
885 | |||
886 | /* This is called when BFD has discovered a symbol which is defined |
||
887 | multiple times. */ |
||
888 | |||
889 | static bfd_boolean |
||
890 | multiple_definition (struct bfd_link_info *info, |
||
891 | struct bfd_link_hash_entry *h, |
||
892 | bfd *nbfd, |
||
893 | asection *nsec, |
||
894 | bfd_vma nval) |
||
895 | { |
||
896 | const char *name; |
||
897 | bfd *obfd; |
||
898 | asection *osec; |
||
899 | bfd_vma oval; |
||
900 | |||
901 | if (info->allow_multiple_definition) |
||
902 | return TRUE; |
||
903 | |||
904 | switch (h->type) |
||
905 | { |
||
906 | case bfd_link_hash_defined: |
||
907 | osec = h->u.def.section; |
||
908 | oval = h->u.def.value; |
||
909 | obfd = h->u.def.section->owner; |
||
910 | break; |
||
911 | case bfd_link_hash_indirect: |
||
912 | osec = bfd_ind_section_ptr; |
||
913 | oval = 0; |
||
914 | obfd = NULL; |
||
915 | break; |
||
916 | default: |
||
917 | abort (); |
||
918 | } |
||
919 | |||
920 | /* Ignore a redefinition of an absolute symbol to the |
||
921 | same value; it's harmless. */ |
||
922 | if (h->type == bfd_link_hash_defined |
||
923 | && bfd_is_abs_section (osec) |
||
924 | && bfd_is_abs_section (nsec) |
||
925 | && nval == oval) |
||
926 | return TRUE; |
||
927 | |||
928 | /* If either section has the output_section field set to |
||
929 | bfd_abs_section_ptr, it means that the section is being |
||
930 | discarded, and this is not really a multiple definition at all. |
||
931 | FIXME: It would be cleaner to somehow ignore symbols defined in |
||
932 | sections which are being discarded. */ |
||
933 | if ((osec->output_section != NULL |
||
934 | && ! bfd_is_abs_section (osec) |
||
935 | && bfd_is_abs_section (osec->output_section)) |
||
936 | || (nsec->output_section != NULL |
||
937 | && ! bfd_is_abs_section (nsec) |
||
938 | && bfd_is_abs_section (nsec->output_section))) |
||
939 | return TRUE; |
||
940 | |||
941 | name = h->root.string; |
||
942 | if (nbfd == NULL) |
||
943 | { |
||
944 | nbfd = obfd; |
||
945 | nsec = osec; |
||
946 | nval = oval; |
||
947 | obfd = NULL; |
||
948 | } |
||
949 | einfo (_("%X%C: multiple definition of `%T'\n"), |
||
950 | nbfd, nsec, nval, name); |
||
951 | if (obfd != NULL) |
||
952 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
||
953 | |||
954 | if (RELAXATION_ENABLED_BY_USER) |
||
955 | { |
||
956 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); |
||
957 | DISABLE_RELAXATION; |
||
958 | } |
||
959 | |||
960 | return TRUE; |
||
961 | } |
||
962 | |||
963 | /* This is called when there is a definition of a common symbol, or |
||
964 | when a common symbol is found for a symbol that is already defined, |
||
965 | or when two common symbols are found. We only do something if |
||
966 | -warn-common was used. */ |
||
967 | |||
968 | static bfd_boolean |
||
969 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
970 | struct bfd_link_hash_entry *h, |
||
971 | bfd *nbfd, |
||
972 | enum bfd_link_hash_type ntype, |
||
973 | bfd_vma nsize) |
||
974 | { |
||
975 | const char *name; |
||
976 | bfd *obfd; |
||
977 | enum bfd_link_hash_type otype; |
||
978 | bfd_vma osize; |
||
979 | |||
980 | if (!config.warn_common) |
||
981 | return TRUE; |
||
982 | |||
983 | name = h->root.string; |
||
984 | otype = h->type; |
||
985 | if (otype == bfd_link_hash_common) |
||
986 | { |
||
987 | obfd = h->u.c.p->section->owner; |
||
988 | osize = h->u.c.size; |
||
989 | } |
||
990 | else if (otype == bfd_link_hash_defined |
||
991 | || otype == bfd_link_hash_defweak) |
||
992 | { |
||
993 | obfd = h->u.def.section->owner; |
||
994 | osize = 0; |
||
995 | } |
||
996 | else |
||
997 | { |
||
998 | /* FIXME: It would nice if we could report the BFD which defined |
||
999 | an indirect symbol, but we don't have anywhere to store the |
||
1000 | information. */ |
||
1001 | obfd = NULL; |
||
1002 | osize = 0; |
||
1003 | } |
||
1004 | |||
1005 | if (ntype == bfd_link_hash_defined |
||
1006 | || ntype == bfd_link_hash_defweak |
||
1007 | || ntype == bfd_link_hash_indirect) |
||
1008 | { |
||
1009 | ASSERT (otype == bfd_link_hash_common); |
||
1010 | einfo (_("%B: warning: definition of `%T' overriding common\n"), |
||
1011 | nbfd, name); |
||
1012 | if (obfd != NULL) |
||
1013 | einfo (_("%B: warning: common is here\n"), obfd); |
||
1014 | } |
||
1015 | else if (otype == bfd_link_hash_defined |
||
1016 | || otype == bfd_link_hash_defweak |
||
1017 | || otype == bfd_link_hash_indirect) |
||
1018 | { |
||
1019 | ASSERT (ntype == bfd_link_hash_common); |
||
1020 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), |
||
1021 | nbfd, name); |
||
1022 | if (obfd != NULL) |
||
1023 | einfo (_("%B: warning: defined here\n"), obfd); |
||
1024 | } |
||
1025 | else |
||
1026 | { |
||
1027 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); |
||
1028 | if (osize > nsize) |
||
1029 | { |
||
1030 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), |
||
1031 | nbfd, name); |
||
1032 | if (obfd != NULL) |
||
1033 | einfo (_("%B: warning: larger common is here\n"), obfd); |
||
1034 | } |
||
1035 | else if (nsize > osize) |
||
1036 | { |
||
1037 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), |
||
1038 | nbfd, name); |
||
1039 | if (obfd != NULL) |
||
1040 | einfo (_("%B: warning: smaller common is here\n"), obfd); |
||
1041 | } |
||
1042 | else |
||
1043 | { |
||
1044 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); |
||
1045 | if (obfd != NULL) |
||
1046 | einfo (_("%B: warning: previous common is here\n"), obfd); |
||
1047 | } |
||
1048 | } |
||
1049 | |||
1050 | return TRUE; |
||
1051 | } |
||
1052 | |||
1053 | /* This is called when BFD has discovered a set element. H is the |
||
1054 | entry in the linker hash table for the set. SECTION and VALUE |
||
1055 | represent a value which should be added to the set. */ |
||
1056 | |||
1057 | static bfd_boolean |
||
1058 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1059 | struct bfd_link_hash_entry *h, |
||
1060 | bfd_reloc_code_real_type reloc, |
||
1061 | bfd *abfd, |
||
1062 | asection *section, |
||
1063 | bfd_vma value) |
||
1064 | { |
||
1065 | if (config.warn_constructors) |
||
1066 | einfo (_("%P: warning: global constructor %s used\n"), |
||
1067 | h->root.string); |
||
1068 | |||
1069 | if (! config.build_constructors) |
||
1070 | return TRUE; |
||
1071 | |||
1072 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
||
1073 | |||
1074 | if (h->type == bfd_link_hash_new) |
||
1075 | { |
||
1076 | h->type = bfd_link_hash_undefined; |
||
1077 | h->u.undef.abfd = abfd; |
||
1078 | /* We don't call bfd_link_add_undef to add this to the list of |
||
1079 | undefined symbols because we are going to define it |
||
1080 | ourselves. */ |
||
1081 | } |
||
1082 | |||
1083 | return TRUE; |
||
1084 | } |
||
1085 | |||
1086 | /* This is called when BFD has discovered a constructor. This is only |
||
1087 | called for some object file formats--those which do not handle |
||
1088 | constructors in some more clever fashion. This is similar to |
||
1089 | adding an element to a set, but less general. */ |
||
1090 | |||
1091 | static bfd_boolean |
||
1092 | constructor_callback (struct bfd_link_info *info, |
||
1093 | bfd_boolean constructor, |
||
1094 | const char *name, |
||
1095 | bfd *abfd, |
||
1096 | asection *section, |
||
1097 | bfd_vma value) |
||
1098 | { |
||
1099 | char *s; |
||
1100 | struct bfd_link_hash_entry *h; |
||
1101 | char set_name[1 + sizeof "__CTOR_LIST__"]; |
||
1102 | |||
1103 | if (config.warn_constructors) |
||
1104 | einfo (_("%P: warning: global constructor %s used\n"), name); |
||
1105 | |||
1106 | if (! config.build_constructors) |
||
1107 | return TRUE; |
||
1108 | |||
1109 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a |
||
1110 | useful error message. */ |
||
1111 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
||
1112 | && (info->relocatable |
||
1113 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
||
1114 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); |
||
1115 | |||
1116 | s = set_name; |
||
1117 | if (bfd_get_symbol_leading_char (abfd) != '\0') |
||
1118 | *s++ = bfd_get_symbol_leading_char (abfd); |
||
1119 | if (constructor) |
||
1120 | strcpy (s, "__CTOR_LIST__"); |
||
1121 | else |
||
1122 | strcpy (s, "__DTOR_LIST__"); |
||
1123 | |||
1124 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
||
1125 | if (h == (struct bfd_link_hash_entry *) NULL) |
||
1126 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); |
||
1127 | if (h->type == bfd_link_hash_new) |
||
1128 | { |
||
1129 | h->type = bfd_link_hash_undefined; |
||
1130 | h->u.undef.abfd = abfd; |
||
1131 | /* We don't call bfd_link_add_undef to add this to the list of |
||
1132 | undefined symbols because we are going to define it |
||
1133 | ourselves. */ |
||
1134 | } |
||
1135 | |||
1136 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); |
||
1137 | return TRUE; |
||
1138 | } |
||
1139 | |||
1140 | /* A structure used by warning_callback to pass information through |
||
1141 | bfd_map_over_sections. */ |
||
1142 | |||
1143 | struct warning_callback_info |
||
1144 | { |
||
1145 | bfd_boolean found; |
||
1146 | const char *warning; |
||
1147 | const char *symbol; |
||
1148 | asymbol **asymbols; |
||
1149 | }; |
||
1150 | |||
1151 | /* This is called when there is a reference to a warning symbol. */ |
||
1152 | |||
1153 | static bfd_boolean |
||
1154 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1155 | const char *warning, |
||
1156 | const char *symbol, |
||
1157 | bfd *abfd, |
||
1158 | asection *section, |
||
1159 | bfd_vma address) |
||
1160 | { |
||
1161 | /* This is a hack to support warn_multiple_gp. FIXME: This should |
||
1162 | have a cleaner interface, but what? */ |
||
1163 | if (! config.warn_multiple_gp |
||
1164 | && strcmp (warning, "using multiple gp values") == 0) |
||
1165 | return TRUE; |
||
1166 | |||
1167 | if (section != NULL) |
||
1168 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
||
1169 | else if (abfd == NULL) |
||
1170 | einfo ("%P: %s%s\n", _("warning: "), warning); |
||
1171 | else if (symbol == NULL) |
||
1172 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
||
1173 | else |
||
1174 | { |
||
1175 | struct warning_callback_info cinfo; |
||
1176 | |||
1177 | /* Look through the relocs to see if we can find a plausible |
||
1178 | address. */ |
||
1179 | |||
1180 | if (!bfd_generic_link_read_symbols (abfd)) |
||
1181 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); |
||
1182 | |||
1183 | cinfo.found = FALSE; |
||
1184 | cinfo.warning = warning; |
||
1185 | cinfo.symbol = symbol; |
||
1186 | cinfo.asymbols = bfd_get_outsymbols (abfd); |
||
1187 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); |
||
1188 | |||
1189 | if (! cinfo.found) |
||
1190 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
||
1191 | } |
||
1192 | |||
1193 | return TRUE; |
||
1194 | } |
||
1195 | |||
1196 | /* This is called by warning_callback for each section. It checks the |
||
1197 | relocs of the section to see if it can find a reference to the |
||
1198 | symbol which triggered the warning. If it can, it uses the reloc |
||
1199 | to give an error message with a file and line number. */ |
||
1200 | |||
1201 | static void |
||
1202 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
||
1203 | { |
||
1204 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
||
1205 | long relsize; |
||
1206 | arelent **relpp; |
||
1207 | long relcount; |
||
1208 | arelent **p, **pend; |
||
1209 | |||
1210 | if (info->found) |
||
1211 | return; |
||
1212 | |||
1213 | relsize = bfd_get_reloc_upper_bound (abfd, sec); |
||
1214 | if (relsize < 0) |
||
1215 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
||
1216 | if (relsize == 0) |
||
1217 | return; |
||
1218 | |||
1219 | relpp = (arelent **) xmalloc (relsize); |
||
1220 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
||
1221 | if (relcount < 0) |
||
1222 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
||
1223 | |||
1224 | p = relpp; |
||
1225 | pend = p + relcount; |
||
1226 | for (; p < pend && *p != NULL; p++) |
||
1227 | { |
||
1228 | arelent *q = *p; |
||
1229 | |||
1230 | if (q->sym_ptr_ptr != NULL |
||
1231 | && *q->sym_ptr_ptr != NULL |
||
1232 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) |
||
1233 | { |
||
1234 | /* We found a reloc for the symbol we are looking for. */ |
||
1235 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
||
1236 | info->warning); |
||
1237 | info->found = TRUE; |
||
1238 | break; |
||
1239 | } |
||
1240 | } |
||
1241 | |||
1242 | free (relpp); |
||
1243 | } |
||
1244 | |||
1245 | /* This is called when an undefined symbol is found. */ |
||
1246 | |||
1247 | static bfd_boolean |
||
1248 | undefined_symbol (struct bfd_link_info *info, |
||
1249 | const char *name, |
||
1250 | bfd *abfd, |
||
1251 | asection *section, |
||
1252 | bfd_vma address, |
||
1253 | bfd_boolean error) |
||
1254 | { |
||
1255 | static char *error_name; |
||
1256 | static unsigned int error_count; |
||
1257 | |||
1258 | #define MAX_ERRORS_IN_A_ROW 5 |
||
1259 | |||
1260 | if (info->ignore_hash != NULL |
||
1261 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) |
||
1262 | return TRUE; |
||
1263 | |||
1264 | if (config.warn_once) |
||
1265 | { |
||
1266 | /* Only warn once about a particular undefined symbol. */ |
||
1267 | add_ignoresym (info, name); |
||
1268 | } |
||
1269 | |||
1270 | /* We never print more than a reasonable number of errors in a row |
||
1271 | for a single symbol. */ |
||
1272 | if (error_name != NULL |
||
1273 | && strcmp (name, error_name) == 0) |
||
1274 | ++error_count; |
||
1275 | else |
||
1276 | { |
||
1277 | error_count = 0; |
||
1278 | if (error_name != NULL) |
||
1279 | free (error_name); |
||
1280 | error_name = xstrdup (name); |
||
1281 | } |
||
1282 | |||
1283 | if (section != NULL) |
||
1284 | { |
||
1285 | if (error_count < MAX_ERRORS_IN_A_ROW) |
||
1286 | { |
||
1287 | if (error) |
||
1288 | einfo (_("%X%C: undefined reference to `%T'\n"), |
||
1289 | abfd, section, address, name); |
||
1290 | else |
||
1291 | einfo (_("%C: warning: undefined reference to `%T'\n"), |
||
1292 | abfd, section, address, name); |
||
1293 | } |
||
1294 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
||
1295 | { |
||
1296 | if (error) |
||
1297 | einfo (_("%X%D: more undefined references to `%T' follow\n"), |
||
1298 | abfd, section, address, name); |
||
1299 | else |
||
1300 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), |
||
1301 | abfd, section, address, name); |
||
1302 | } |
||
1303 | else if (error) |
||
1304 | einfo ("%X"); |
||
1305 | } |
||
1306 | else |
||
1307 | { |
||
1308 | if (error_count < MAX_ERRORS_IN_A_ROW) |
||
1309 | { |
||
1310 | if (error) |
||
1311 | einfo (_("%X%B: undefined reference to `%T'\n"), |
||
1312 | abfd, name); |
||
1313 | else |
||
1314 | einfo (_("%B: warning: undefined reference to `%T'\n"), |
||
1315 | abfd, name); |
||
1316 | } |
||
1317 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
||
1318 | { |
||
1319 | if (error) |
||
1320 | einfo (_("%X%B: more undefined references to `%T' follow\n"), |
||
1321 | abfd, name); |
||
1322 | else |
||
1323 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), |
||
1324 | abfd, name); |
||
1325 | } |
||
1326 | else if (error) |
||
1327 | einfo ("%X"); |
||
1328 | } |
||
1329 | |||
1330 | return TRUE; |
||
1331 | } |
||
1332 | |||
1333 | /* Counter to limit the number of relocation overflow error messages |
||
1334 | to print. Errors are printed as it is decremented. When it's |
||
1335 | called and the counter is zero, a final message is printed |
||
1336 | indicating more relocations were omitted. When it gets to -1, no |
||
1337 | such errors are printed. If it's initially set to a value less |
||
1338 | than -1, all such errors will be printed (--verbose does this). */ |
||
1339 | |||
1340 | int overflow_cutoff_limit = 10; |
||
1341 | |||
1342 | /* This is called when a reloc overflows. */ |
||
1343 | |||
1344 | static bfd_boolean |
||
1345 | reloc_overflow (struct bfd_link_info *info, |
||
1346 | struct bfd_link_hash_entry *entry, |
||
1347 | const char *name, |
||
1348 | const char *reloc_name, |
||
1349 | bfd_vma addend, |
||
1350 | bfd *abfd, |
||
1351 | asection *section, |
||
1352 | bfd_vma address) |
||
1353 | { |
||
1354 | if (overflow_cutoff_limit == -1) |
||
1355 | return TRUE; |
||
1356 | |||
1357 | einfo ("%X%H:", abfd, section, address); |
||
1358 | |||
1359 | if (overflow_cutoff_limit >= 0 |
||
1360 | && overflow_cutoff_limit-- == 0) |
||
1361 | { |
||
1362 | einfo (_(" additional relocation overflows omitted from the output\n")); |
||
1363 | return TRUE; |
||
1364 | } |
||
1365 | |||
1366 | if (entry) |
||
1367 | { |
||
1368 | while (entry->type == bfd_link_hash_indirect |
||
1369 | || entry->type == bfd_link_hash_warning) |
||
1370 | entry = entry->u.i.link; |
||
1371 | switch (entry->type) |
||
1372 | { |
||
1373 | case bfd_link_hash_undefined: |
||
1374 | case bfd_link_hash_undefweak: |
||
1375 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), |
||
1376 | reloc_name, entry->root.string); |
||
1377 | break; |
||
1378 | case bfd_link_hash_defined: |
||
1379 | case bfd_link_hash_defweak: |
||
1380 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), |
||
1381 | reloc_name, entry->root.string, |
||
1382 | entry->u.def.section, |
||
1383 | entry->u.def.section == bfd_abs_section_ptr |
||
1384 | ? info->output_bfd : entry->u.def.section->owner); |
||
1385 | break; |
||
1386 | default: |
||
1387 | abort (); |
||
1388 | break; |
||
1389 | } |
||
1390 | } |
||
1391 | else |
||
1392 | einfo (_(" relocation truncated to fit: %s against `%T'"), |
||
1393 | reloc_name, name); |
||
1394 | if (addend != 0) |
||
1395 | einfo ("+%v", addend); |
||
1396 | einfo ("\n"); |
||
1397 | return TRUE; |
||
1398 | } |
||
1399 | |||
1400 | /* This is called when a dangerous relocation is made. */ |
||
1401 | |||
1402 | static bfd_boolean |
||
1403 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1404 | const char *message, |
||
1405 | bfd *abfd, |
||
1406 | asection *section, |
||
1407 | bfd_vma address) |
||
1408 | { |
||
1409 | einfo (_("%X%H: dangerous relocation: %s\n"), |
||
1410 | abfd, section, address, message); |
||
1411 | return TRUE; |
||
1412 | } |
||
1413 | |||
1414 | /* This is called when a reloc is being generated attached to a symbol |
||
1415 | that is not being output. */ |
||
1416 | |||
1417 | static bfd_boolean |
||
1418 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
||
1419 | const char *name, |
||
1420 | bfd *abfd, |
||
1421 | asection *section, |
||
1422 | bfd_vma address) |
||
1423 | { |
||
1424 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
||
1425 | abfd, section, address, name); |
||
1426 | return TRUE; |
||
1427 | } |
||
1428 | |||
1429 | /* This is called if link_info.notice_all is set, or when a symbol in |
||
1430 | link_info.notice_hash is found. Symbols are put in notice_hash |
||
1431 | using the -y option, while notice_all is set if the --cref option |
||
1432 | has been supplied, or if there are any NOCROSSREFS sections in the |
||
1433 | linker script; and if plugins are active, since they need to monitor |
||
1434 | all references from non-IR files. */ |
||
1435 | |||
1436 | static bfd_boolean |
||
1437 | notice (struct bfd_link_info *info, |
||
1438 | struct bfd_link_hash_entry *h, |
||
1439 | bfd *abfd, |
||
1440 | asection *section, |
||
1441 | bfd_vma value, |
||
1442 | flagword flags ATTRIBUTE_UNUSED, |
||
1443 | const char *string ATTRIBUTE_UNUSED) |
||
1444 | { |
||
1445 | const char *name; |
||
1446 | |||
1447 | if (h == NULL) |
||
1448 | { |
||
1449 | if (command_line.cref || nocrossref_list != NULL) |
||
1450 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
||
1451 | return TRUE; |
||
1452 | } |
||
1453 | |||
1454 | name = h->root.string; |
||
1455 | if (info->notice_hash != NULL |
||
1456 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
||
1457 | { |
||
1458 | if (bfd_is_und_section (section)) |
||
1459 | einfo ("%B: reference to %s\n", abfd, name); |
||
1460 | else |
||
1461 | einfo ("%B: definition of %s\n", abfd, name); |
||
1462 | } |
||
1463 | |||
1464 | if (command_line.cref || nocrossref_list != NULL) |
||
1465 | add_cref (name, abfd, section, value); |
||
1466 | |||
1467 | return TRUE; |
||
1468 | }>>>>>>>>>> |