Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
e922bcab | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
f96b4a7b | 7 | This file is part of the GNU Binutils. |
252b5132 | 8 | |
f96b4a7b | 9 | This program is free software; you can redistribute it and/or modify |
2fa9fc65 | 10 | it under the terms of the GNU General Public License as published by |
f96b4a7b NC |
11 | the Free Software Foundation; either version 3 of the License, or |
12 | (at your option) any later version. | |
252b5132 | 13 | |
f96b4a7b | 14 | This program is distributed in the hope that it will be useful, |
2fa9fc65 NC |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
252b5132 | 18 | |
2fa9fc65 | 19 | You should have received a copy of the GNU General Public License |
f96b4a7b NC |
20 | along with this program; if not, write to the Free Software |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
252b5132 | 23 | |
252b5132 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
3882b010 | 26 | #include "safe-ctype.h" |
252b5132 RH |
27 | #include "libiberty.h" |
28 | #include "progress.h" | |
29 | #include "bfdlink.h" | |
5af11cab | 30 | #include "filenames.h" |
252b5132 RH |
31 | |
32 | #include "ld.h" | |
33 | #include "ldmain.h" | |
34 | #include "ldmisc.h" | |
35 | #include "ldwrite.h" | |
252b5132 RH |
36 | #include "ldexp.h" |
37 | #include "ldlang.h" | |
df2a7313 | 38 | #include <ldgram.h> |
252b5132 RH |
39 | #include "ldlex.h" |
40 | #include "ldfile.h" | |
b71e2778 | 41 | #include "ldemul.h" |
252b5132 | 42 | #include "ldctor.h" |
5d3236ee DK |
43 | #ifdef ENABLE_PLUGINS |
44 | #include "plugin.h" | |
45 | #include "plugin-api.h" | |
46 | #include "libbfd.h" | |
47 | #endif /* ENABLE_PLUGINS */ | |
252b5132 | 48 | |
0125cdf2 | 49 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
50 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
51 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
52 | #endif | |
53 | ||
54 | #include <string.h> | |
55 | ||
56 | #ifdef HAVE_SBRK | |
502bdb00 | 57 | #if !HAVE_DECL_SBRK |
1579bae1 | 58 | extern void *sbrk (); |
252b5132 RH |
59 | #endif |
60 | #endif | |
61 | ||
9c8ebd6a DJ |
62 | #ifndef TARGET_SYSTEM_ROOT |
63 | #define TARGET_SYSTEM_ROOT "" | |
64 | #endif | |
65 | ||
252b5132 RH |
66 | /* EXPORTS */ |
67 | ||
53d25da6 AM |
68 | FILE *saved_script_handle = NULL; |
69 | FILE *previous_script_handle = NULL; | |
70 | bfd_boolean force_make_executable = FALSE; | |
71 | ||
252b5132 RH |
72 | char *default_target; |
73 | const char *output_filename = "a.out"; | |
74 | ||
75 | /* Name this program was invoked by. */ | |
76 | char *program_name; | |
77 | ||
9c8ebd6a | 78 | /* The prefix for system library directories. */ |
e2243057 | 79 | const char *ld_sysroot; |
9c8ebd6a | 80 | |
3fe38064 NC |
81 | /* The canonical representation of ld_sysroot. */ |
82 | char * ld_canon_sysroot; | |
83 | int ld_canon_sysroot_len; | |
84 | ||
252b5132 RH |
85 | /* Set by -G argument, for MIPS ECOFF target. */ |
86 | int g_switch_value = 8; | |
87 | ||
88 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 89 | bfd_boolean trace_files; |
252b5132 RH |
90 | |
91 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 92 | bfd_boolean trace_file_tries; |
252b5132 RH |
93 | |
94 | /* Nonzero means version number was printed, so exit successfully | |
95 | instead of complaining if no input files are given. */ | |
b34976b6 | 96 | bfd_boolean version_printed; |
252b5132 RH |
97 | |
98 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 99 | bfd_boolean whole_archive; |
252b5132 | 100 | |
ddbb8a31 NC |
101 | /* True means only create DT_NEEDED entries for dynamic libraries |
102 | if they actually satisfy some reference in a regular object. */ | |
103 | bfd_boolean add_DT_NEEDED_for_regular; | |
104 | ||
105 | /* True means create DT_NEEDED entries for dynamic libraries that | |
106 | are DT_NEEDED by dynamic libraries specifically mentioned on | |
107 | the command line. */ | |
df856bcc | 108 | bfd_boolean add_DT_NEEDED_for_dynamic = TRUE; |
e56f61be | 109 | |
b34976b6 AM |
110 | /* TRUE if we should demangle symbol names. */ |
111 | bfd_boolean demangling; | |
252b5132 RH |
112 | |
113 | args_type command_line; | |
114 | ||
115 | ld_config_type config; | |
116 | ||
bcaa7b3e L |
117 | sort_type sort_section; |
118 | ||
e2243057 RS |
119 | static const char *get_sysroot |
120 | (int, char **); | |
0125cdf2 | 121 | static char *get_emulation |
1579bae1 | 122 | (int, char **); |
0125cdf2 | 123 | static bfd_boolean add_archive_element |
5d3236ee | 124 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
0125cdf2 | 125 | static bfd_boolean multiple_definition |
24f58f47 | 126 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 127 | bfd *, asection *, bfd_vma); |
0125cdf2 | 128 | static bfd_boolean multiple_common |
24f58f47 AM |
129 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
130 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 131 | static bfd_boolean add_to_set |
1579bae1 AM |
132 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
133 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 134 | static bfd_boolean constructor_callback |
1579bae1 AM |
135 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
136 | asection *, bfd_vma); | |
0125cdf2 | 137 | static bfd_boolean warning_callback |
1579bae1 AM |
138 | (struct bfd_link_info *, const char *, const char *, bfd *, |
139 | asection *, bfd_vma); | |
0125cdf2 | 140 | static void warning_find_reloc |
1579bae1 | 141 | (bfd *, asection *, void *); |
0125cdf2 | 142 | static bfd_boolean undefined_symbol |
1579bae1 AM |
143 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
144 | bfd_boolean); | |
0125cdf2 | 145 | static bfd_boolean reloc_overflow |
dfeffb9f L |
146 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
147 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 148 | static bfd_boolean reloc_dangerous |
1579bae1 | 149 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 150 | static bfd_boolean unattached_reloc |
1579bae1 | 151 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 152 | static bfd_boolean notice |
35ed3f94 | 153 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
16d96b5b | 154 | bfd *, asection *, bfd_vma, flagword, const char *); |
0125cdf2 NC |
155 | |
156 | static struct bfd_link_callbacks link_callbacks = | |
157 | { | |
252b5132 RH |
158 | add_archive_element, |
159 | multiple_definition, | |
160 | multiple_common, | |
161 | add_to_set, | |
162 | constructor_callback, | |
163 | warning_callback, | |
164 | undefined_symbol, | |
165 | reloc_overflow, | |
166 | reloc_dangerous, | |
167 | unattached_reloc, | |
e1fffbe6 | 168 | notice, |
2889e75b | 169 | einfo, |
49fa1e15 AM |
170 | info_msg, |
171 | minfo, | |
2889e75b | 172 | ldlang_override_segment_assignment |
252b5132 RH |
173 | }; |
174 | ||
175 | struct bfd_link_info link_info; | |
176 | \f | |
177 | static void | |
498cd2a0 | 178 | ld_cleanup (void) |
252b5132 | 179 | { |
498cd2a0 AM |
180 | bfd_cache_close_all (); |
181 | #ifdef ENABLE_PLUGINS | |
182 | plugin_call_cleanup (); | |
183 | #endif | |
184 | if (output_filename && delete_output_file_on_failure) | |
185 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
186 | } |
187 | ||
188 | int | |
1579bae1 | 189 | main (int argc, char **argv) |
252b5132 RH |
190 | { |
191 | char *emulation; | |
192 | long start_time = get_run_time (); | |
193 | ||
194 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
195 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
196 | #endif |
197 | #if defined (HAVE_SETLOCALE) | |
198 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
199 | #endif |
200 | bindtextdomain (PACKAGE, LOCALEDIR); | |
201 | textdomain (PACKAGE); | |
202 | ||
203 | program_name = argv[0]; | |
204 | xmalloc_set_program_name (program_name); | |
205 | ||
206 | START_PROGRESS (program_name, 0); | |
207 | ||
869b9d07 MM |
208 | expandargv (&argc, &argv); |
209 | ||
252b5132 RH |
210 | bfd_init (); |
211 | ||
212 | bfd_set_error_program_name (program_name); | |
213 | ||
498cd2a0 | 214 | xatexit (ld_cleanup); |
252b5132 | 215 | |
e2243057 RS |
216 | /* Set up the sysroot directory. */ |
217 | ld_sysroot = get_sysroot (argc, argv); | |
218 | if (*ld_sysroot) | |
9c8ebd6a | 219 | { |
e2243057 | 220 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 221 | { |
70487fb2 | 222 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 223 | ld_sysroot = ""; |
0125cdf2 | 224 | } |
e2243057 RS |
225 | else |
226 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 227 | } |
3fe38064 NC |
228 | if (ld_canon_sysroot) |
229 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
230 | else | |
231 | ld_canon_sysroot_len = -1; | |
232 | ||
252b5132 RH |
233 | /* Set the default BFD target based on the configured target. Doing |
234 | this permits the linker to be configured for a particular target, | |
235 | and linked against a shared BFD library which was configured for | |
236 | a different target. The macro TARGET is defined by Makefile. */ | |
237 | if (! bfd_set_default_target (TARGET)) | |
238 | { | |
239 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
240 | xexit (1); | |
241 | } | |
242 | ||
b47c4208 AM |
243 | #if YYDEBUG |
244 | { | |
245 | extern int yydebug; | |
246 | yydebug = 1; | |
247 | } | |
248 | #endif | |
249 | ||
b34976b6 | 250 | config.build_constructors = TRUE; |
c76308d2 | 251 | config.rpath_separator = ':'; |
a854a4a7 AM |
252 | config.split_by_reloc = (unsigned) -1; |
253 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
254 | config.make_executable = TRUE; |
255 | config.magic_demand_paged = TRUE; | |
256 | config.text_read_only = TRUE; | |
257 | ||
b34976b6 | 258 | command_line.warn_mismatch = TRUE; |
fe7929ce | 259 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 260 | command_line.check_section_addresses = -1; |
28d5f677 | 261 | command_line.disable_target_specific_optimizations = -1; |
bcaa7b3e | 262 | |
252b5132 RH |
263 | /* We initialize DEMANGLING based on the environment variable |
264 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
265 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
266 | environment. Acting the same way here lets us provide the same | |
267 | interface by default. */ | |
268 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
269 | ||
b34976b6 | 270 | link_info.allow_undefined_version = TRUE; |
b5067602 | 271 | link_info.keep_memory = TRUE; |
b5067602 | 272 | link_info.combreloc = TRUE; |
d5cd3933 | 273 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 274 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
275 | link_info.callbacks = &link_callbacks; |
276 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
277 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
278 | and _fini symbols. We are compatible. */ | |
279 | link_info.init_function = "_init"; | |
280 | link_info.fini_function = "_fini"; | |
a9a4c53e | 281 | link_info.relax_pass = 1; |
e0076ab3 | 282 | link_info.pei386_auto_import = -1; |
db6751f2 | 283 | link_info.spare_dynamic_tags = 5; |
967928e9 | 284 | link_info.path_separator = ':'; |
24718e3b | 285 | |
252b5132 | 286 | ldfile_add_arch (""); |
252b5132 RH |
287 | emulation = get_emulation (argc, argv); |
288 | ldemul_choose_mode (emulation); | |
742aeb63 | 289 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
290 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
291 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 RH |
292 | lang_init (); |
293 | ldemul_before_parse (); | |
b34976b6 | 294 | lang_has_input_file = FALSE; |
252b5132 RH |
295 | parse_args (argc, argv); |
296 | ||
2d643429 NC |
297 | if (config.hash_table_size != 0) |
298 | bfd_hash_set_default_size (config.hash_table_size); | |
299 | ||
252b5132 RH |
300 | ldemul_set_symbols (); |
301 | ||
1049f94e | 302 | if (link_info.relocatable) |
252b5132 | 303 | { |
02b0b1aa NS |
304 | if (command_line.check_section_addresses < 0) |
305 | command_line.check_section_addresses = 0; | |
252b5132 RH |
306 | if (link_info.shared) |
307 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
308 | } | |
309 | ||
d8cf8b51 L |
310 | /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, |
311 | --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and | |
312 | --dynamic-list FILE. -Bsymbolic and -Bsymbolic-functions are | |
313 | for shared libraries. -Bsymbolic overrides all others and vice | |
314 | versa. */ | |
315 | switch (command_line.symbolic) | |
316 | { | |
317 | case symbolic_unset: | |
318 | break; | |
319 | case symbolic: | |
320 | /* -Bsymbolic is for shared library only. */ | |
321 | if (link_info.shared) | |
322 | { | |
323 | link_info.symbolic = TRUE; | |
324 | /* Should we free the unused memory? */ | |
325 | link_info.dynamic_list = NULL; | |
326 | command_line.dynamic_list = dynamic_list_unset; | |
327 | } | |
328 | break; | |
329 | case symbolic_functions: | |
330 | /* -Bsymbolic-functions is for shared library only. */ | |
331 | if (link_info.shared) | |
332 | command_line.dynamic_list = dynamic_list_data; | |
333 | break; | |
334 | } | |
335 | ||
336 | switch (command_line.dynamic_list) | |
337 | { | |
338 | case dynamic_list_unset: | |
339 | break; | |
340 | case dynamic_list_data: | |
341 | link_info.dynamic_data = TRUE; | |
342 | case dynamic_list: | |
343 | link_info.dynamic = TRUE; | |
344 | break; | |
345 | } | |
346 | ||
7333607e JJ |
347 | if (! link_info.shared) |
348 | { | |
349 | if (command_line.filter_shlib) | |
e97cb84f | 350 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 351 | if (command_line.auxiliary_filters) |
e97cb84f | 352 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
353 | } |
354 | ||
36af4a4e JJ |
355 | if (! link_info.shared || link_info.pie) |
356 | link_info.executable = TRUE; | |
357 | ||
252b5132 RH |
358 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
359 | don't see how else this can be handled, since in this case we | |
360 | must preserve all externally visible symbols. */ | |
1049f94e | 361 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
362 | { |
363 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 364 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
365 | link_info.discard = discard_all; |
366 | } | |
367 | ||
14be8564 L |
368 | /* If we have not already opened and parsed a linker script, |
369 | try the default script from command line first. */ | |
370 | if (saved_script_handle == NULL | |
371 | && command_line.default_script != NULL) | |
372 | { | |
373 | ldfile_open_command_file (command_line.default_script); | |
374 | parser_input = input_script; | |
375 | yyparse (); | |
376 | } | |
377 | ||
b9a8de1e NC |
378 | /* If we have not already opened and parsed a linker script |
379 | read the emulation's appropriate default script. */ | |
b90e1c6f | 380 | if (saved_script_handle == NULL) |
252b5132 | 381 | { |
252b5132 | 382 | int isfile; |
b7a26f91 | 383 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
384 | |
385 | if (isfile) | |
7d24f02c | 386 | ldfile_open_default_command_file (s); |
252b5132 | 387 | else |
b7a26f91 | 388 | { |
252b5132 RH |
389 | lex_string = s; |
390 | lex_redirect (s); | |
391 | } | |
392 | parser_input = input_script; | |
393 | yyparse (); | |
394 | lex_string = NULL; | |
395 | } | |
396 | ||
b9a8de1e NC |
397 | if (trace_file_tries) |
398 | { | |
9cb61eab AM |
399 | if (saved_script_handle) |
400 | info_msg (_("using external linker script:")); | |
401 | else | |
402 | info_msg (_("using internal linker script:")); | |
403 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
404 | |
405 | if (saved_script_handle) | |
406 | { | |
74699268 | 407 | static const int ld_bufsz = 8193; |
b9a8de1e | 408 | size_t n; |
1e9cc1c2 | 409 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
410 | |
411 | rewind (saved_script_handle); | |
74699268 | 412 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 413 | { |
b7a26f91 | 414 | buf[n] = 0; |
b9a8de1e NC |
415 | info_msg (buf); |
416 | } | |
417 | rewind (saved_script_handle); | |
418 | free (buf); | |
419 | } | |
420 | else | |
421 | { | |
422 | int isfile; | |
423 | ||
b7a26f91 | 424 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 425 | } |
b7a26f91 | 426 | |
b9a8de1e NC |
427 | info_msg ("\n==================================================\n"); |
428 | } | |
429 | ||
252b5132 RH |
430 | lang_final (); |
431 | ||
b34976b6 | 432 | if (!lang_has_input_file) |
252b5132 RH |
433 | { |
434 | if (version_printed) | |
435 | xexit (0); | |
436 | einfo (_("%P%F: no input files\n")); | |
437 | } | |
438 | ||
439 | if (trace_files) | |
0125cdf2 | 440 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
441 | |
442 | ldemul_after_parse (); | |
443 | ||
252b5132 RH |
444 | if (config.map_filename) |
445 | { | |
446 | if (strcmp (config.map_filename, "-") == 0) | |
447 | { | |
448 | config.map_file = stdout; | |
449 | } | |
450 | else | |
451 | { | |
452 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
453 | if (config.map_file == (FILE *) NULL) | |
454 | { | |
455 | bfd_set_error (bfd_error_system_call); | |
456 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
457 | config.map_filename); | |
458 | } | |
459 | } | |
460 | } | |
461 | ||
252b5132 RH |
462 | lang_process (); |
463 | ||
464 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 465 | symbols, and possibly multiple definitions. */ |
1049f94e | 466 | if (link_info.relocatable) |
f13a99db | 467 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 468 | else |
f13a99db | 469 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
470 | |
471 | ldwrite (); | |
472 | ||
473 | if (config.map_file != NULL) | |
474 | lang_map (); | |
475 | if (command_line.cref) | |
476 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
477 | if (nocrossref_list != NULL) | |
478 | check_nocrossrefs (); | |
479 | ||
750877ba L |
480 | lang_finish (); |
481 | ||
1049f94e | 482 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 483 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 484 | want to ignore for relocatable output?) */ |
b34976b6 | 485 | if (!config.make_executable && !force_make_executable) |
252b5132 | 486 | { |
b34976b6 | 487 | if (trace_files) |
0125cdf2 NC |
488 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
489 | output_filename); | |
252b5132 RH |
490 | |
491 | /* The file will be removed by remove_output. */ | |
252b5132 RH |
492 | xexit (1); |
493 | } | |
494 | else | |
495 | { | |
f13a99db AM |
496 | if (! bfd_close (link_info.output_bfd)) |
497 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
498 | |
499 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
500 | executable file and it doesn't end in .exe, copy it to one |
501 | which does. */ | |
1049f94e | 502 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
503 | { |
504 | int len = strlen (output_filename); | |
0125cdf2 | 505 | |
6d5e62f8 | 506 | if (len < 4 |
252b5132 RH |
507 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
508 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
509 | { | |
510 | FILE *src; | |
511 | FILE *dst; | |
512 | const int bsize = 4096; | |
1e9cc1c2 | 513 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 514 | int l; |
1e9cc1c2 | 515 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 516 | |
252b5132 RH |
517 | strcpy (dst_name, output_filename); |
518 | strcat (dst_name, ".exe"); | |
519 | src = fopen (output_filename, FOPEN_RB); | |
520 | dst = fopen (dst_name, FOPEN_WB); | |
521 | ||
522 | if (!src) | |
1579bae1 AM |
523 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
524 | output_filename); | |
252b5132 | 525 | if (!dst) |
1579bae1 AM |
526 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
527 | dst_name); | |
252b5132 RH |
528 | while ((l = fread (buf, 1, bsize, src)) > 0) |
529 | { | |
530 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 531 | |
252b5132 | 532 | if (done != l) |
0125cdf2 | 533 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 534 | } |
0125cdf2 | 535 | |
252b5132 RH |
536 | fclose (src); |
537 | if (fclose (dst) == EOF) | |
0125cdf2 | 538 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
539 | free (dst_name); |
540 | free (buf); | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | END_PROGRESS (program_name); | |
546 | ||
547 | if (config.stats) | |
548 | { | |
549 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 550 | char *lim = (char *) sbrk (0); |
252b5132 RH |
551 | #endif |
552 | long run_time = get_run_time () - start_time; | |
553 | ||
e922bcab | 554 | fflush (stdout); |
252b5132 RH |
555 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
556 | program_name, run_time / 1000000, run_time % 1000000); | |
557 | #ifdef HAVE_SBRK | |
558 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
559 | (long) (lim - (char *) &environ)); | |
560 | #endif | |
e922bcab | 561 | fflush (stderr); |
252b5132 RH |
562 | } |
563 | ||
564 | /* Prevent remove_output from doing anything, after a successful link. */ | |
565 | output_filename = NULL; | |
566 | ||
567 | xexit (0); | |
568 | return 0; | |
569 | } | |
570 | ||
e2243057 RS |
571 | /* If the configured sysroot is relocatable, try relocating it based on |
572 | default prefix FROM. Return the relocated directory if it exists, | |
573 | otherwise return null. */ | |
574 | ||
575 | static char * | |
576 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
577 | { | |
578 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
579 | char *path; | |
580 | struct stat s; | |
581 | ||
582 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
583 | if (path) | |
584 | { | |
585 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
586 | return path; | |
587 | free (path); | |
588 | } | |
589 | #endif | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
594 | ||
595 | static const char * | |
596 | get_sysroot (int argc, char **argv) | |
597 | { | |
598 | int i; | |
599 | const char *path; | |
600 | ||
601 | for (i = 1; i < argc; i++) | |
0112cd26 | 602 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
603 | return argv[i] + strlen ("--sysroot="); |
604 | ||
605 | path = get_relative_sysroot (BINDIR); | |
606 | if (path) | |
607 | return path; | |
608 | ||
609 | path = get_relative_sysroot (TOOLBINDIR); | |
610 | if (path) | |
611 | return path; | |
612 | ||
613 | return TARGET_SYSTEM_ROOT; | |
614 | } | |
615 | ||
252b5132 RH |
616 | /* We need to find any explicitly given emulation in order to initialize the |
617 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
618 | ||
619 | static char * | |
1579bae1 | 620 | get_emulation (int argc, char **argv) |
252b5132 RH |
621 | { |
622 | char *emulation; | |
623 | int i; | |
624 | ||
625 | emulation = getenv (EMULATION_ENVIRON); | |
626 | if (emulation == NULL) | |
627 | emulation = DEFAULT_EMULATION; | |
628 | ||
629 | for (i = 1; i < argc; i++) | |
630 | { | |
0112cd26 | 631 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
632 | { |
633 | if (argv[i][2] == '\0') | |
634 | { | |
635 | /* -m EMUL */ | |
636 | if (i < argc - 1) | |
637 | { | |
638 | emulation = argv[i + 1]; | |
639 | i++; | |
640 | } | |
641 | else | |
0125cdf2 | 642 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
643 | } |
644 | else if (strcmp (argv[i], "-mips1") == 0 | |
645 | || strcmp (argv[i], "-mips2") == 0 | |
646 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 647 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
648 | || strcmp (argv[i], "-mips5") == 0 |
649 | || strcmp (argv[i], "-mips32") == 0 | |
650 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
651 | || strcmp (argv[i], "-mips64") == 0 |
652 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 653 | { |
31d677f9 | 654 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
655 | passed to the linker by some MIPS compilers. They |
656 | generally tell the linker to use a slightly different | |
657 | library path. Perhaps someday these should be | |
658 | implemented as emulations; until then, we just ignore | |
659 | the arguments and hope that nobody ever creates | |
660 | emulations named ips1, ips2 or ips3. */ | |
661 | } | |
662 | else if (strcmp (argv[i], "-m486") == 0) | |
663 | { | |
664 | /* FIXME: The argument -m486 is passed to the linker on | |
665 | some Linux systems. Hope that nobody creates an | |
666 | emulation named 486. */ | |
667 | } | |
668 | else | |
669 | { | |
670 | /* -mEMUL */ | |
671 | emulation = &argv[i][2]; | |
672 | } | |
673 | } | |
674 | } | |
675 | ||
676 | return emulation; | |
677 | } | |
678 | ||
252b5132 | 679 | void |
1579bae1 | 680 | add_ysym (const char *name) |
252b5132 | 681 | { |
1579bae1 | 682 | if (link_info.notice_hash == NULL) |
252b5132 | 683 | { |
1e9cc1c2 NC |
684 | link_info.notice_hash = |
685 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
686 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
687 | bfd_hash_newfunc, | |
688 | sizeof (struct bfd_hash_entry), | |
689 | 61)) | |
252b5132 | 690 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 691 | } |
252b5132 | 692 | |
1579bae1 | 693 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
694 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
695 | } | |
696 | ||
697 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
698 | ||
699 | void | |
1579bae1 | 700 | add_wrap (const char *name) |
252b5132 RH |
701 | { |
702 | if (link_info.wrap_hash == NULL) | |
703 | { | |
1e9cc1c2 NC |
704 | link_info.wrap_hash = |
705 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
706 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
707 | bfd_hash_newfunc, | |
708 | sizeof (struct bfd_hash_entry), | |
709 | 61)) | |
252b5132 RH |
710 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
711 | } | |
0125cdf2 | 712 | |
b34976b6 | 713 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
714 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
715 | } | |
716 | ||
717 | /* Handle the -retain-symbols-file option. */ | |
718 | ||
719 | void | |
1579bae1 | 720 | add_keepsyms_file (const char *filename) |
252b5132 RH |
721 | { |
722 | FILE *file; | |
723 | char *buf; | |
724 | size_t bufsize; | |
725 | int c; | |
726 | ||
727 | if (link_info.strip == strip_some) | |
728 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
729 | ||
730 | file = fopen (filename, "r"); | |
1579bae1 | 731 | if (file == NULL) |
252b5132 RH |
732 | { |
733 | bfd_set_error (bfd_error_system_call); | |
734 | einfo ("%X%P: %s: %E\n", filename); | |
735 | return; | |
736 | } | |
737 | ||
1e9cc1c2 NC |
738 | link_info.keep_hash = (struct bfd_hash_table *) |
739 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
740 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
741 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
742 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
743 | ||
744 | bufsize = 100; | |
1e9cc1c2 | 745 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
746 | |
747 | c = getc (file); | |
748 | while (c != EOF) | |
749 | { | |
3882b010 | 750 | while (ISSPACE (c)) |
252b5132 RH |
751 | c = getc (file); |
752 | ||
753 | if (c != EOF) | |
754 | { | |
755 | size_t len = 0; | |
756 | ||
3882b010 | 757 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
758 | { |
759 | buf[len] = c; | |
760 | ++len; | |
761 | if (len >= bufsize) | |
762 | { | |
763 | bufsize *= 2; | |
1e9cc1c2 | 764 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
765 | } |
766 | c = getc (file); | |
767 | } | |
768 | ||
769 | buf[len] = '\0'; | |
770 | ||
1579bae1 | 771 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
772 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
773 | } | |
774 | } | |
775 | ||
776 | if (link_info.strip != strip_none) | |
777 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
778 | ||
5ed6aba4 | 779 | free (buf); |
252b5132 RH |
780 | link_info.strip = strip_some; |
781 | } | |
782 | \f | |
783 | /* Callbacks from the BFD linker routines. */ | |
784 | ||
785 | /* This is called when BFD has decided to include an archive member in | |
786 | a link. */ | |
787 | ||
b34976b6 | 788 | static bfd_boolean |
e1fffbe6 | 789 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 790 | bfd *abfd, |
5d3236ee DK |
791 | const char *name, |
792 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
793 | { |
794 | lang_input_statement_type *input; | |
5d3236ee | 795 | lang_input_statement_type orig_input; |
252b5132 | 796 | |
1e9cc1c2 NC |
797 | input = (lang_input_statement_type *) |
798 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
799 | input->filename = abfd->filename; |
800 | input->local_sym_name = abfd->filename; | |
801 | input->the_bfd = abfd; | |
252b5132 | 802 | |
5d3236ee DK |
803 | /* Save the original data for trace files/tries below, as plugins |
804 | (if enabled) may possibly alter it to point to a replacement | |
805 | BFD, but we still want to output the original BFD filename. */ | |
806 | orig_input = *input; | |
807 | #ifdef ENABLE_PLUGINS | |
9e2278f5 AM |
808 | if (bfd_my_archive (abfd) != NULL |
809 | && plugin_active_plugins_p () | |
810 | && !no_more_claiming) | |
5d3236ee DK |
811 | { |
812 | /* We must offer this archive member to the plugins to claim. */ | |
813 | int fd = open (bfd_my_archive (abfd)->filename, O_RDONLY | O_BINARY); | |
814 | if (fd >= 0) | |
815 | { | |
816 | struct ld_plugin_input_file file; | |
02d00247 | 817 | |
5d3236ee DK |
818 | /* Offset and filesize must refer to the individual archive |
819 | member, not the whole file, and must exclude the header. | |
820 | Fortunately for us, that is how the data is stored in the | |
821 | origin field of the bfd and in the arelt_data. */ | |
822 | file.name = bfd_my_archive (abfd)->filename; | |
823 | file.offset = abfd->origin; | |
824 | file.filesize = arelt_size (abfd); | |
825 | file.fd = fd; | |
02d00247 AM |
826 | plugin_maybe_claim (&file, input); |
827 | if (input->claimed) | |
5d3236ee | 828 | { |
8543fde5 | 829 | input->claim_archive = TRUE; |
5d3236ee DK |
830 | *subsbfd = input->the_bfd; |
831 | } | |
5d3236ee DK |
832 | } |
833 | } | |
834 | #endif /* ENABLE_PLUGINS */ | |
835 | ||
252b5132 RH |
836 | ldlang_add_file (input); |
837 | ||
1579bae1 | 838 | if (config.map_file != NULL) |
252b5132 | 839 | { |
b34976b6 | 840 | static bfd_boolean header_printed; |
252b5132 RH |
841 | struct bfd_link_hash_entry *h; |
842 | bfd *from; | |
843 | int len; | |
844 | ||
e1fffbe6 | 845 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
846 | |
847 | if (h == NULL) | |
848 | from = NULL; | |
849 | else | |
850 | { | |
851 | switch (h->type) | |
852 | { | |
853 | default: | |
854 | from = NULL; | |
855 | break; | |
856 | ||
857 | case bfd_link_hash_defined: | |
858 | case bfd_link_hash_defweak: | |
859 | from = h->u.def.section->owner; | |
860 | break; | |
861 | ||
862 | case bfd_link_hash_undefined: | |
863 | case bfd_link_hash_undefweak: | |
864 | from = h->u.undef.abfd; | |
865 | break; | |
866 | ||
867 | case bfd_link_hash_common: | |
868 | from = h->u.c.p->section->owner; | |
869 | break; | |
870 | } | |
871 | } | |
872 | ||
873 | if (! header_printed) | |
874 | { | |
875 | char buf[100]; | |
876 | ||
e3c8793a | 877 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 878 | minfo ("%s", buf); |
b34976b6 | 879 | header_printed = TRUE; |
252b5132 RH |
880 | } |
881 | ||
882 | if (bfd_my_archive (abfd) == NULL) | |
883 | { | |
884 | minfo ("%s", bfd_get_filename (abfd)); | |
885 | len = strlen (bfd_get_filename (abfd)); | |
886 | } | |
887 | else | |
888 | { | |
889 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
890 | bfd_get_filename (abfd)); | |
891 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
892 | + strlen (bfd_get_filename (abfd)) | |
893 | + 2); | |
894 | } | |
895 | ||
896 | if (len >= 29) | |
897 | { | |
898 | print_nl (); | |
899 | len = 0; | |
900 | } | |
901 | while (len < 30) | |
902 | { | |
903 | print_space (); | |
904 | ++len; | |
905 | } | |
906 | ||
907 | if (from != NULL) | |
908 | minfo ("%B ", from); | |
909 | if (h != NULL) | |
910 | minfo ("(%T)\n", h->root.string); | |
911 | else | |
912 | minfo ("(%s)\n", name); | |
913 | } | |
914 | ||
915 | if (trace_files || trace_file_tries) | |
5d3236ee | 916 | info_msg ("%I\n", &orig_input); |
b34976b6 | 917 | return TRUE; |
252b5132 RH |
918 | } |
919 | ||
920 | /* This is called when BFD has discovered a symbol which is defined | |
921 | multiple times. */ | |
922 | ||
b34976b6 | 923 | static bfd_boolean |
24f58f47 AM |
924 | multiple_definition (struct bfd_link_info *info, |
925 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
926 | bfd *nbfd, |
927 | asection *nsec, | |
928 | bfd_vma nval) | |
252b5132 | 929 | { |
24f58f47 AM |
930 | const char *name; |
931 | bfd *obfd; | |
932 | asection *osec; | |
933 | bfd_vma oval; | |
934 | ||
935 | if (info->allow_multiple_definition) | |
936 | return TRUE; | |
937 | ||
938 | switch (h->type) | |
939 | { | |
940 | case bfd_link_hash_defined: | |
941 | osec = h->u.def.section; | |
942 | oval = h->u.def.value; | |
943 | obfd = h->u.def.section->owner; | |
944 | break; | |
945 | case bfd_link_hash_indirect: | |
946 | osec = bfd_ind_section_ptr; | |
947 | oval = 0; | |
948 | obfd = NULL; | |
949 | break; | |
950 | default: | |
951 | abort (); | |
952 | } | |
953 | ||
954 | /* Ignore a redefinition of an absolute symbol to the | |
955 | same value; it's harmless. */ | |
956 | if (h->type == bfd_link_hash_defined | |
957 | && bfd_is_abs_section (osec) | |
958 | && bfd_is_abs_section (nsec) | |
959 | && nval == oval) | |
960 | return TRUE; | |
961 | ||
252b5132 RH |
962 | /* If either section has the output_section field set to |
963 | bfd_abs_section_ptr, it means that the section is being | |
964 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
965 | FIXME: It would be cleaner to somehow ignore symbols defined in |
966 | sections which are being discarded. */ | |
252b5132 RH |
967 | if ((osec->output_section != NULL |
968 | && ! bfd_is_abs_section (osec) | |
969 | && bfd_is_abs_section (osec->output_section)) | |
970 | || (nsec->output_section != NULL | |
971 | && ! bfd_is_abs_section (nsec) | |
972 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 973 | return TRUE; |
252b5132 | 974 | |
24f58f47 AM |
975 | name = h->root.string; |
976 | if (nbfd == NULL) | |
977 | { | |
978 | nbfd = obfd; | |
979 | nsec = osec; | |
980 | nval = oval; | |
981 | obfd = NULL; | |
982 | } | |
252b5132 RH |
983 | einfo (_("%X%C: multiple definition of `%T'\n"), |
984 | nbfd, nsec, nval, name); | |
1579bae1 | 985 | if (obfd != NULL) |
252b5132 | 986 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 987 | |
28d5f677 | 988 | if (RELAXATION_ENABLED) |
9b14b192 NC |
989 | { |
990 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
28d5f677 | 991 | command_line.disable_target_specific_optimizations = -1; |
9b14b192 | 992 | } |
6d5e62f8 | 993 | |
b34976b6 | 994 | return TRUE; |
252b5132 RH |
995 | } |
996 | ||
997 | /* This is called when there is a definition of a common symbol, or | |
998 | when a common symbol is found for a symbol that is already defined, | |
999 | or when two common symbols are found. We only do something if | |
1000 | -warn-common was used. */ | |
1001 | ||
b34976b6 | 1002 | static bfd_boolean |
1579bae1 | 1003 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 1004 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1005 | bfd *nbfd, |
1006 | enum bfd_link_hash_type ntype, | |
1007 | bfd_vma nsize) | |
252b5132 | 1008 | { |
24f58f47 AM |
1009 | const char *name; |
1010 | bfd *obfd; | |
1011 | enum bfd_link_hash_type otype; | |
1012 | bfd_vma osize; | |
1013 | ||
1014 | if (!config.warn_common) | |
b34976b6 | 1015 | return TRUE; |
252b5132 | 1016 | |
24f58f47 AM |
1017 | name = h->root.string; |
1018 | otype = h->type; | |
1019 | if (otype == bfd_link_hash_common) | |
1020 | { | |
1021 | obfd = h->u.c.p->section->owner; | |
1022 | osize = h->u.c.size; | |
1023 | } | |
1024 | else if (otype == bfd_link_hash_defined | |
1025 | || otype == bfd_link_hash_defweak) | |
1026 | { | |
1027 | obfd = h->u.def.section->owner; | |
1028 | osize = 0; | |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | /* FIXME: It would nice if we could report the BFD which defined | |
1033 | an indirect symbol, but we don't have anywhere to store the | |
1034 | information. */ | |
1035 | obfd = NULL; | |
1036 | osize = 0; | |
1037 | } | |
1038 | ||
252b5132 RH |
1039 | if (ntype == bfd_link_hash_defined |
1040 | || ntype == bfd_link_hash_defweak | |
1041 | || ntype == bfd_link_hash_indirect) | |
1042 | { | |
1043 | ASSERT (otype == bfd_link_hash_common); | |
1044 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1045 | nbfd, name); | |
1046 | if (obfd != NULL) | |
1047 | einfo (_("%B: warning: common is here\n"), obfd); | |
1048 | } | |
1049 | else if (otype == bfd_link_hash_defined | |
1050 | || otype == bfd_link_hash_defweak | |
1051 | || otype == bfd_link_hash_indirect) | |
1052 | { | |
1053 | ASSERT (ntype == bfd_link_hash_common); | |
1054 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1055 | nbfd, name); | |
1056 | if (obfd != NULL) | |
1057 | einfo (_("%B: warning: defined here\n"), obfd); | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1062 | if (osize > nsize) | |
1063 | { | |
1064 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1065 | nbfd, name); | |
1066 | if (obfd != NULL) | |
1067 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1068 | } | |
1069 | else if (nsize > osize) | |
1070 | { | |
1071 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1072 | nbfd, name); | |
1073 | if (obfd != NULL) | |
1074 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1075 | } | |
1076 | else | |
1077 | { | |
1078 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1079 | if (obfd != NULL) | |
1080 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1081 | } | |
1082 | } | |
1083 | ||
b34976b6 | 1084 | return TRUE; |
252b5132 RH |
1085 | } |
1086 | ||
1087 | /* This is called when BFD has discovered a set element. H is the | |
1088 | entry in the linker hash table for the set. SECTION and VALUE | |
1089 | represent a value which should be added to the set. */ | |
1090 | ||
b34976b6 | 1091 | static bfd_boolean |
1579bae1 AM |
1092 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1093 | struct bfd_link_hash_entry *h, | |
1094 | bfd_reloc_code_real_type reloc, | |
1095 | bfd *abfd, | |
1096 | asection *section, | |
1097 | bfd_vma value) | |
252b5132 RH |
1098 | { |
1099 | if (config.warn_constructors) | |
1100 | einfo (_("%P: warning: global constructor %s used\n"), | |
1101 | h->root.string); | |
1102 | ||
1103 | if (! config.build_constructors) | |
b34976b6 | 1104 | return TRUE; |
252b5132 | 1105 | |
1579bae1 | 1106 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1107 | |
1108 | if (h->type == bfd_link_hash_new) | |
1109 | { | |
1110 | h->type = bfd_link_hash_undefined; | |
1111 | h->u.undef.abfd = abfd; | |
1112 | /* We don't call bfd_link_add_undef to add this to the list of | |
1113 | undefined symbols because we are going to define it | |
1114 | ourselves. */ | |
1115 | } | |
1116 | ||
b34976b6 | 1117 | return TRUE; |
252b5132 RH |
1118 | } |
1119 | ||
1120 | /* This is called when BFD has discovered a constructor. This is only | |
1121 | called for some object file formats--those which do not handle | |
1122 | constructors in some more clever fashion. This is similar to | |
1123 | adding an element to a set, but less general. */ | |
1124 | ||
b34976b6 | 1125 | static bfd_boolean |
1579bae1 AM |
1126 | constructor_callback (struct bfd_link_info *info, |
1127 | bfd_boolean constructor, | |
1128 | const char *name, | |
1129 | bfd *abfd, | |
1130 | asection *section, | |
1131 | bfd_vma value) | |
252b5132 RH |
1132 | { |
1133 | char *s; | |
1134 | struct bfd_link_hash_entry *h; | |
1135 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1136 | ||
1137 | if (config.warn_constructors) | |
1138 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1139 | ||
1140 | if (! config.build_constructors) | |
b34976b6 | 1141 | return TRUE; |
252b5132 RH |
1142 | |
1143 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1144 | useful error message. */ | |
f13a99db | 1145 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1146 | && (info->relocatable |
252b5132 RH |
1147 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1148 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1149 | ||
1150 | s = set_name; | |
1151 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1152 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1153 | if (constructor) | |
1154 | strcpy (s, "__CTOR_LIST__"); | |
1155 | else | |
1156 | strcpy (s, "__DTOR_LIST__"); | |
1157 | ||
b34976b6 | 1158 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1159 | if (h == (struct bfd_link_hash_entry *) NULL) |
1160 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1161 | if (h->type == bfd_link_hash_new) | |
1162 | { | |
1163 | h->type = bfd_link_hash_undefined; | |
1164 | h->u.undef.abfd = abfd; | |
1165 | /* We don't call bfd_link_add_undef to add this to the list of | |
1166 | undefined symbols because we are going to define it | |
1167 | ourselves. */ | |
1168 | } | |
1169 | ||
1170 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1171 | return TRUE; |
252b5132 RH |
1172 | } |
1173 | ||
1174 | /* A structure used by warning_callback to pass information through | |
1175 | bfd_map_over_sections. */ | |
1176 | ||
0125cdf2 NC |
1177 | struct warning_callback_info |
1178 | { | |
b34976b6 | 1179 | bfd_boolean found; |
252b5132 RH |
1180 | const char *warning; |
1181 | const char *symbol; | |
1182 | asymbol **asymbols; | |
1183 | }; | |
1184 | ||
1185 | /* This is called when there is a reference to a warning symbol. */ | |
1186 | ||
b34976b6 | 1187 | static bfd_boolean |
1579bae1 AM |
1188 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1189 | const char *warning, | |
1190 | const char *symbol, | |
1191 | bfd *abfd, | |
1192 | asection *section, | |
1193 | bfd_vma address) | |
252b5132 RH |
1194 | { |
1195 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1196 | have a cleaner interface, but what? */ | |
1197 | if (! config.warn_multiple_gp | |
1198 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1199 | return TRUE; |
252b5132 RH |
1200 | |
1201 | if (section != NULL) | |
300475fe | 1202 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1203 | else if (abfd == NULL) |
300475fe | 1204 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1205 | else if (symbol == NULL) |
300475fe | 1206 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1207 | else |
1208 | { | |
91d6fa6a | 1209 | struct warning_callback_info cinfo; |
252b5132 RH |
1210 | |
1211 | /* Look through the relocs to see if we can find a plausible | |
1212 | address. */ | |
5c1d2f5f AM |
1213 | |
1214 | if (!bfd_generic_link_read_symbols (abfd)) | |
1215 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1216 | |
91d6fa6a NC |
1217 | cinfo.found = FALSE; |
1218 | cinfo.warning = warning; | |
1219 | cinfo.symbol = symbol; | |
1220 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1221 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
252b5132 | 1222 | |
91d6fa6a | 1223 | if (! cinfo.found) |
300475fe | 1224 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1225 | } |
1226 | ||
b34976b6 | 1227 | return TRUE; |
252b5132 RH |
1228 | } |
1229 | ||
1230 | /* This is called by warning_callback for each section. It checks the | |
1231 | relocs of the section to see if it can find a reference to the | |
1232 | symbol which triggered the warning. If it can, it uses the reloc | |
1233 | to give an error message with a file and line number. */ | |
1234 | ||
1235 | static void | |
1579bae1 | 1236 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1237 | { |
1e9cc1c2 | 1238 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1239 | long relsize; |
1240 | arelent **relpp; | |
1241 | long relcount; | |
1242 | arelent **p, **pend; | |
1243 | ||
1244 | if (info->found) | |
1245 | return; | |
1246 | ||
1247 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1248 | if (relsize < 0) | |
1249 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1250 | if (relsize == 0) | |
1251 | return; | |
1252 | ||
1e9cc1c2 | 1253 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1254 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1255 | if (relcount < 0) | |
1256 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1257 | ||
1258 | p = relpp; | |
1259 | pend = p + relcount; | |
1260 | for (; p < pend && *p != NULL; p++) | |
1261 | { | |
1262 | arelent *q = *p; | |
1263 | ||
1264 | if (q->sym_ptr_ptr != NULL | |
1265 | && *q->sym_ptr_ptr != NULL | |
1266 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1267 | { | |
1268 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1269 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1270 | info->warning); | |
b34976b6 | 1271 | info->found = TRUE; |
252b5132 RH |
1272 | break; |
1273 | } | |
1274 | } | |
1275 | ||
1276 | free (relpp); | |
1277 | } | |
1278 | ||
1279 | /* This is called when an undefined symbol is found. */ | |
1280 | ||
b34976b6 | 1281 | static bfd_boolean |
1579bae1 AM |
1282 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1283 | const char *name, | |
1284 | bfd *abfd, | |
1285 | asection *section, | |
1286 | bfd_vma address, | |
0b28295d | 1287 | bfd_boolean error) |
252b5132 RH |
1288 | { |
1289 | static char *error_name; | |
1290 | static unsigned int error_count; | |
1291 | ||
1292 | #define MAX_ERRORS_IN_A_ROW 5 | |
1293 | ||
1294 | if (config.warn_once) | |
1295 | { | |
1296 | static struct bfd_hash_table *hash; | |
1297 | ||
1298 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1299 | if (hash == NULL) |
1300 | { | |
1e9cc1c2 NC |
1301 | hash = (struct bfd_hash_table *) |
1302 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
1303 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1304 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1305 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1306 | } | |
1307 | ||
b34976b6 AM |
1308 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1309 | return TRUE; | |
252b5132 | 1310 | |
b34976b6 | 1311 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1312 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1313 | } | |
1314 | ||
1315 | /* We never print more than a reasonable number of errors in a row | |
1316 | for a single symbol. */ | |
1579bae1 | 1317 | if (error_name != NULL |
252b5132 RH |
1318 | && strcmp (name, error_name) == 0) |
1319 | ++error_count; | |
1320 | else | |
1321 | { | |
1322 | error_count = 0; | |
1579bae1 | 1323 | if (error_name != NULL) |
252b5132 | 1324 | free (error_name); |
d1b2b2dc | 1325 | error_name = xstrdup (name); |
252b5132 RH |
1326 | } |
1327 | ||
1328 | if (section != NULL) | |
1329 | { | |
1330 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1331 | { |
0b28295d ILT |
1332 | if (error) |
1333 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1334 | abfd, section, address, name); | |
1335 | else | |
1336 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1337 | abfd, section, address, name); | |
b6f29aaa | 1338 | } |
252b5132 | 1339 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1340 | { |
1341 | if (error) | |
1342 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1343 | abfd, section, address, name); | |
1344 | else | |
1345 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1346 | abfd, section, address, name); | |
1347 | } | |
1348 | else if (error) | |
1349 | einfo ("%X"); | |
252b5132 RH |
1350 | } |
1351 | else | |
1352 | { | |
1353 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1354 | { |
0b28295d ILT |
1355 | if (error) |
1356 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1357 | abfd, name); | |
1358 | else | |
1359 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1360 | abfd, name); | |
b6f29aaa | 1361 | } |
252b5132 | 1362 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1363 | { |
1364 | if (error) | |
1365 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1366 | abfd, name); | |
1367 | else | |
1368 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1369 | abfd, name); | |
1370 | } | |
1371 | else if (error) | |
1372 | einfo ("%X"); | |
252b5132 RH |
1373 | } |
1374 | ||
b34976b6 | 1375 | return TRUE; |
252b5132 RH |
1376 | } |
1377 | ||
8aae64e6 AO |
1378 | /* Counter to limit the number of relocation overflow error messages |
1379 | to print. Errors are printed as it is decremented. When it's | |
1380 | called and the counter is zero, a final message is printed | |
1381 | indicating more relocations were omitted. When it gets to -1, no | |
1382 | such errors are printed. If it's initially set to a value less | |
1383 | than -1, all such errors will be printed (--verbose does this). */ | |
1384 | ||
1385 | int overflow_cutoff_limit = 10; | |
1386 | ||
252b5132 RH |
1387 | /* This is called when a reloc overflows. */ |
1388 | ||
b34976b6 | 1389 | static bfd_boolean |
1579bae1 | 1390 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1391 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1392 | const char *name, |
1393 | const char *reloc_name, | |
1394 | bfd_vma addend, | |
1395 | bfd *abfd, | |
1396 | asection *section, | |
1397 | bfd_vma address) | |
252b5132 | 1398 | { |
8aae64e6 AO |
1399 | if (overflow_cutoff_limit == -1) |
1400 | return TRUE; | |
1401 | ||
270396f2 | 1402 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1403 | |
1404 | if (overflow_cutoff_limit >= 0 | |
1405 | && overflow_cutoff_limit-- == 0) | |
1406 | { | |
1407 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1408 | return TRUE; | |
1409 | } | |
1410 | ||
dfeffb9f L |
1411 | if (entry) |
1412 | { | |
1413 | while (entry->type == bfd_link_hash_indirect | |
1414 | || entry->type == bfd_link_hash_warning) | |
1415 | entry = entry->u.i.link; | |
1416 | switch (entry->type) | |
1417 | { | |
1418 | case bfd_link_hash_undefined: | |
1419 | case bfd_link_hash_undefweak: | |
1420 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1421 | reloc_name, entry->root.string); | |
1422 | break; | |
1423 | case bfd_link_hash_defined: | |
1424 | case bfd_link_hash_defweak: | |
1425 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1426 | reloc_name, entry->root.string, | |
a6e1b90f L |
1427 | entry->u.def.section, |
1428 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1429 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1430 | break; |
1431 | default: | |
1432 | abort (); | |
1433 | break; | |
1434 | } | |
1435 | } | |
1436 | else | |
1437 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1438 | reloc_name, name); | |
252b5132 RH |
1439 | if (addend != 0) |
1440 | einfo ("+%v", addend); | |
1441 | einfo ("\n"); | |
b34976b6 | 1442 | return TRUE; |
252b5132 RH |
1443 | } |
1444 | ||
1445 | /* This is called when a dangerous relocation is made. */ | |
1446 | ||
b34976b6 | 1447 | static bfd_boolean |
1579bae1 AM |
1448 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1449 | const char *message, | |
1450 | bfd *abfd, | |
1451 | asection *section, | |
1452 | bfd_vma address) | |
252b5132 | 1453 | { |
270396f2 | 1454 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1455 | abfd, section, address, message); |
b34976b6 | 1456 | return TRUE; |
252b5132 RH |
1457 | } |
1458 | ||
1459 | /* This is called when a reloc is being generated attached to a symbol | |
1460 | that is not being output. */ | |
1461 | ||
b34976b6 | 1462 | static bfd_boolean |
1579bae1 AM |
1463 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1464 | const char *name, | |
1465 | bfd *abfd, | |
1466 | asection *section, | |
1467 | bfd_vma address) | |
252b5132 | 1468 | { |
270396f2 | 1469 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1470 | abfd, section, address, name); |
b34976b6 | 1471 | return TRUE; |
252b5132 RH |
1472 | } |
1473 | ||
1474 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1475 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1476 | using the -y option, while notice_all is set if the --cref option |
1477 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1478 | linker script; and if plugins are active, since they need to monitor | |
1479 | all references from non-IR files. */ | |
252b5132 | 1480 | |
b34976b6 | 1481 | static bfd_boolean |
1579bae1 | 1482 | notice (struct bfd_link_info *info, |
35ed3f94 | 1483 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1484 | bfd *abfd, |
1485 | asection *section, | |
16d96b5b AM |
1486 | bfd_vma value, |
1487 | flagword flags ATTRIBUTE_UNUSED, | |
1488 | const char *string ATTRIBUTE_UNUSED) | |
252b5132 | 1489 | { |
35ed3f94 AM |
1490 | const char *name; |
1491 | ||
1492 | if (h == NULL) | |
5061a885 AM |
1493 | { |
1494 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1495 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1496 | return TRUE; |
1497 | } | |
1498 | ||
35ed3f94 | 1499 | name = h->root.string; |
5d3236ee | 1500 | if (info->notice_hash != NULL |
9e2278f5 | 1501 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1502 | { |
1503 | if (bfd_is_und_section (section)) | |
1504 | einfo ("%B: reference to %s\n", abfd, name); | |
1505 | else | |
1506 | einfo ("%B: definition of %s\n", abfd, name); | |
1507 | } | |
1508 | ||
1509 | if (command_line.cref || nocrossref_list != NULL) | |
1510 | add_cref (name, abfd, section, value); | |
1511 | ||
b34976b6 | 1512 | return TRUE; |
252b5132 | 1513 | } |