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 |
1579bae1 AM |
126 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
127 | bfd *, asection *, bfd_vma); | |
0125cdf2 | 128 | static bfd_boolean multiple_common |
1579bae1 AM |
129 | (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, |
130 | bfd_vma, 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 |
1579bae1 | 153 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 NC |
154 | |
155 | static struct bfd_link_callbacks link_callbacks = | |
156 | { | |
252b5132 RH |
157 | add_archive_element, |
158 | multiple_definition, | |
159 | multiple_common, | |
160 | add_to_set, | |
161 | constructor_callback, | |
162 | warning_callback, | |
163 | undefined_symbol, | |
164 | reloc_overflow, | |
165 | reloc_dangerous, | |
166 | unattached_reloc, | |
e1fffbe6 | 167 | notice, |
2889e75b | 168 | einfo, |
49fa1e15 AM |
169 | info_msg, |
170 | minfo, | |
2889e75b | 171 | ldlang_override_segment_assignment |
252b5132 RH |
172 | }; |
173 | ||
174 | struct bfd_link_info link_info; | |
175 | \f | |
176 | static void | |
498cd2a0 | 177 | ld_cleanup (void) |
252b5132 | 178 | { |
498cd2a0 AM |
179 | bfd_cache_close_all (); |
180 | #ifdef ENABLE_PLUGINS | |
181 | plugin_call_cleanup (); | |
182 | #endif | |
183 | if (output_filename && delete_output_file_on_failure) | |
184 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
185 | } |
186 | ||
187 | int | |
1579bae1 | 188 | main (int argc, char **argv) |
252b5132 RH |
189 | { |
190 | char *emulation; | |
191 | long start_time = get_run_time (); | |
192 | ||
193 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
194 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
195 | #endif |
196 | #if defined (HAVE_SETLOCALE) | |
197 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
198 | #endif |
199 | bindtextdomain (PACKAGE, LOCALEDIR); | |
200 | textdomain (PACKAGE); | |
201 | ||
202 | program_name = argv[0]; | |
203 | xmalloc_set_program_name (program_name); | |
204 | ||
205 | START_PROGRESS (program_name, 0); | |
206 | ||
869b9d07 MM |
207 | expandargv (&argc, &argv); |
208 | ||
252b5132 RH |
209 | bfd_init (); |
210 | ||
211 | bfd_set_error_program_name (program_name); | |
212 | ||
498cd2a0 | 213 | xatexit (ld_cleanup); |
252b5132 | 214 | |
e2243057 RS |
215 | /* Set up the sysroot directory. */ |
216 | ld_sysroot = get_sysroot (argc, argv); | |
217 | if (*ld_sysroot) | |
9c8ebd6a | 218 | { |
e2243057 | 219 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 220 | { |
70487fb2 | 221 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 222 | ld_sysroot = ""; |
0125cdf2 | 223 | } |
e2243057 RS |
224 | else |
225 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 226 | } |
3fe38064 NC |
227 | if (ld_canon_sysroot) |
228 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
229 | else | |
230 | ld_canon_sysroot_len = -1; | |
231 | ||
252b5132 RH |
232 | /* Set the default BFD target based on the configured target. Doing |
233 | this permits the linker to be configured for a particular target, | |
234 | and linked against a shared BFD library which was configured for | |
235 | a different target. The macro TARGET is defined by Makefile. */ | |
236 | if (! bfd_set_default_target (TARGET)) | |
237 | { | |
238 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
239 | xexit (1); | |
240 | } | |
241 | ||
b47c4208 AM |
242 | #if YYDEBUG |
243 | { | |
244 | extern int yydebug; | |
245 | yydebug = 1; | |
246 | } | |
247 | #endif | |
248 | ||
b34976b6 | 249 | config.build_constructors = TRUE; |
c76308d2 | 250 | config.rpath_separator = ':'; |
a854a4a7 AM |
251 | config.split_by_reloc = (unsigned) -1; |
252 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
253 | config.make_executable = TRUE; |
254 | config.magic_demand_paged = TRUE; | |
255 | config.text_read_only = TRUE; | |
256 | ||
b34976b6 | 257 | command_line.warn_mismatch = TRUE; |
fe7929ce | 258 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 259 | command_line.check_section_addresses = -1; |
28d5f677 | 260 | command_line.disable_target_specific_optimizations = -1; |
bcaa7b3e | 261 | |
252b5132 RH |
262 | /* We initialize DEMANGLING based on the environment variable |
263 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
264 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
265 | environment. Acting the same way here lets us provide the same | |
266 | interface by default. */ | |
267 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
268 | ||
b34976b6 | 269 | link_info.allow_undefined_version = TRUE; |
b5067602 | 270 | link_info.keep_memory = TRUE; |
b5067602 | 271 | link_info.combreloc = TRUE; |
d5cd3933 | 272 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 273 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
274 | link_info.callbacks = &link_callbacks; |
275 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
276 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
277 | and _fini symbols. We are compatible. */ | |
278 | link_info.init_function = "_init"; | |
279 | link_info.fini_function = "_fini"; | |
a9a4c53e | 280 | link_info.relax_pass = 1; |
e0076ab3 | 281 | link_info.pei386_auto_import = -1; |
db6751f2 | 282 | link_info.spare_dynamic_tags = 5; |
967928e9 | 283 | link_info.path_separator = ':'; |
24718e3b | 284 | |
252b5132 | 285 | ldfile_add_arch (""); |
252b5132 RH |
286 | emulation = get_emulation (argc, argv); |
287 | ldemul_choose_mode (emulation); | |
742aeb63 | 288 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
289 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
290 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 RH |
291 | lang_init (); |
292 | ldemul_before_parse (); | |
b34976b6 | 293 | lang_has_input_file = FALSE; |
252b5132 RH |
294 | parse_args (argc, argv); |
295 | ||
2d643429 NC |
296 | if (config.hash_table_size != 0) |
297 | bfd_hash_set_default_size (config.hash_table_size); | |
298 | ||
252b5132 RH |
299 | ldemul_set_symbols (); |
300 | ||
1049f94e | 301 | if (link_info.relocatable) |
252b5132 | 302 | { |
02b0b1aa NS |
303 | if (command_line.check_section_addresses < 0) |
304 | command_line.check_section_addresses = 0; | |
252b5132 RH |
305 | if (link_info.shared) |
306 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
307 | } | |
308 | ||
d8cf8b51 L |
309 | /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, |
310 | --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and | |
311 | --dynamic-list FILE. -Bsymbolic and -Bsymbolic-functions are | |
312 | for shared libraries. -Bsymbolic overrides all others and vice | |
313 | versa. */ | |
314 | switch (command_line.symbolic) | |
315 | { | |
316 | case symbolic_unset: | |
317 | break; | |
318 | case symbolic: | |
319 | /* -Bsymbolic is for shared library only. */ | |
320 | if (link_info.shared) | |
321 | { | |
322 | link_info.symbolic = TRUE; | |
323 | /* Should we free the unused memory? */ | |
324 | link_info.dynamic_list = NULL; | |
325 | command_line.dynamic_list = dynamic_list_unset; | |
326 | } | |
327 | break; | |
328 | case symbolic_functions: | |
329 | /* -Bsymbolic-functions is for shared library only. */ | |
330 | if (link_info.shared) | |
331 | command_line.dynamic_list = dynamic_list_data; | |
332 | break; | |
333 | } | |
334 | ||
335 | switch (command_line.dynamic_list) | |
336 | { | |
337 | case dynamic_list_unset: | |
338 | break; | |
339 | case dynamic_list_data: | |
340 | link_info.dynamic_data = TRUE; | |
341 | case dynamic_list: | |
342 | link_info.dynamic = TRUE; | |
343 | break; | |
344 | } | |
345 | ||
7333607e JJ |
346 | if (! link_info.shared) |
347 | { | |
348 | if (command_line.filter_shlib) | |
e97cb84f | 349 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 350 | if (command_line.auxiliary_filters) |
e97cb84f | 351 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
352 | } |
353 | ||
36af4a4e JJ |
354 | if (! link_info.shared || link_info.pie) |
355 | link_info.executable = TRUE; | |
356 | ||
252b5132 RH |
357 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
358 | don't see how else this can be handled, since in this case we | |
359 | must preserve all externally visible symbols. */ | |
1049f94e | 360 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
361 | { |
362 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 363 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
364 | link_info.discard = discard_all; |
365 | } | |
366 | ||
14be8564 L |
367 | /* If we have not already opened and parsed a linker script, |
368 | try the default script from command line first. */ | |
369 | if (saved_script_handle == NULL | |
370 | && command_line.default_script != NULL) | |
371 | { | |
372 | ldfile_open_command_file (command_line.default_script); | |
373 | parser_input = input_script; | |
374 | yyparse (); | |
375 | } | |
376 | ||
b9a8de1e NC |
377 | /* If we have not already opened and parsed a linker script |
378 | read the emulation's appropriate default script. */ | |
b90e1c6f | 379 | if (saved_script_handle == NULL) |
252b5132 | 380 | { |
252b5132 | 381 | int isfile; |
b7a26f91 | 382 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
383 | |
384 | if (isfile) | |
7d24f02c | 385 | ldfile_open_default_command_file (s); |
252b5132 | 386 | else |
b7a26f91 | 387 | { |
252b5132 RH |
388 | lex_string = s; |
389 | lex_redirect (s); | |
390 | } | |
391 | parser_input = input_script; | |
392 | yyparse (); | |
393 | lex_string = NULL; | |
394 | } | |
395 | ||
b9a8de1e NC |
396 | if (trace_file_tries) |
397 | { | |
9cb61eab AM |
398 | if (saved_script_handle) |
399 | info_msg (_("using external linker script:")); | |
400 | else | |
401 | info_msg (_("using internal linker script:")); | |
402 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
403 | |
404 | if (saved_script_handle) | |
405 | { | |
74699268 | 406 | static const int ld_bufsz = 8193; |
b9a8de1e | 407 | size_t n; |
1e9cc1c2 | 408 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
409 | |
410 | rewind (saved_script_handle); | |
74699268 | 411 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 412 | { |
b7a26f91 | 413 | buf[n] = 0; |
b9a8de1e NC |
414 | info_msg (buf); |
415 | } | |
416 | rewind (saved_script_handle); | |
417 | free (buf); | |
418 | } | |
419 | else | |
420 | { | |
421 | int isfile; | |
422 | ||
b7a26f91 | 423 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 424 | } |
b7a26f91 | 425 | |
b9a8de1e NC |
426 | info_msg ("\n==================================================\n"); |
427 | } | |
428 | ||
252b5132 RH |
429 | lang_final (); |
430 | ||
b34976b6 | 431 | if (!lang_has_input_file) |
252b5132 RH |
432 | { |
433 | if (version_printed) | |
434 | xexit (0); | |
435 | einfo (_("%P%F: no input files\n")); | |
436 | } | |
437 | ||
438 | if (trace_files) | |
0125cdf2 | 439 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
440 | |
441 | ldemul_after_parse (); | |
442 | ||
252b5132 RH |
443 | if (config.map_filename) |
444 | { | |
445 | if (strcmp (config.map_filename, "-") == 0) | |
446 | { | |
447 | config.map_file = stdout; | |
448 | } | |
449 | else | |
450 | { | |
451 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
452 | if (config.map_file == (FILE *) NULL) | |
453 | { | |
454 | bfd_set_error (bfd_error_system_call); | |
455 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
456 | config.map_filename); | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
252b5132 RH |
461 | lang_process (); |
462 | ||
463 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 464 | symbols, and possibly multiple definitions. */ |
1049f94e | 465 | if (link_info.relocatable) |
f13a99db | 466 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 467 | else |
f13a99db | 468 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
469 | |
470 | ldwrite (); | |
471 | ||
472 | if (config.map_file != NULL) | |
473 | lang_map (); | |
474 | if (command_line.cref) | |
475 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
476 | if (nocrossref_list != NULL) | |
477 | check_nocrossrefs (); | |
478 | ||
750877ba L |
479 | lang_finish (); |
480 | ||
1049f94e | 481 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 482 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 483 | want to ignore for relocatable output?) */ |
b34976b6 | 484 | if (!config.make_executable && !force_make_executable) |
252b5132 | 485 | { |
b34976b6 | 486 | if (trace_files) |
0125cdf2 NC |
487 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
488 | output_filename); | |
252b5132 RH |
489 | |
490 | /* The file will be removed by remove_output. */ | |
252b5132 RH |
491 | xexit (1); |
492 | } | |
493 | else | |
494 | { | |
f13a99db AM |
495 | if (! bfd_close (link_info.output_bfd)) |
496 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
497 | |
498 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
499 | executable file and it doesn't end in .exe, copy it to one |
500 | which does. */ | |
1049f94e | 501 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
502 | { |
503 | int len = strlen (output_filename); | |
0125cdf2 | 504 | |
6d5e62f8 | 505 | if (len < 4 |
252b5132 RH |
506 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
507 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
508 | { | |
509 | FILE *src; | |
510 | FILE *dst; | |
511 | const int bsize = 4096; | |
1e9cc1c2 | 512 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 513 | int l; |
1e9cc1c2 | 514 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 515 | |
252b5132 RH |
516 | strcpy (dst_name, output_filename); |
517 | strcat (dst_name, ".exe"); | |
518 | src = fopen (output_filename, FOPEN_RB); | |
519 | dst = fopen (dst_name, FOPEN_WB); | |
520 | ||
521 | if (!src) | |
1579bae1 AM |
522 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
523 | output_filename); | |
252b5132 | 524 | if (!dst) |
1579bae1 AM |
525 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
526 | dst_name); | |
252b5132 RH |
527 | while ((l = fread (buf, 1, bsize, src)) > 0) |
528 | { | |
529 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 530 | |
252b5132 | 531 | if (done != l) |
0125cdf2 | 532 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 533 | } |
0125cdf2 | 534 | |
252b5132 RH |
535 | fclose (src); |
536 | if (fclose (dst) == EOF) | |
0125cdf2 | 537 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
538 | free (dst_name); |
539 | free (buf); | |
540 | } | |
541 | } | |
542 | } | |
543 | ||
544 | END_PROGRESS (program_name); | |
545 | ||
546 | if (config.stats) | |
547 | { | |
548 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 549 | char *lim = (char *) sbrk (0); |
252b5132 RH |
550 | #endif |
551 | long run_time = get_run_time () - start_time; | |
552 | ||
e922bcab | 553 | fflush (stdout); |
252b5132 RH |
554 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
555 | program_name, run_time / 1000000, run_time % 1000000); | |
556 | #ifdef HAVE_SBRK | |
557 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
558 | (long) (lim - (char *) &environ)); | |
559 | #endif | |
e922bcab | 560 | fflush (stderr); |
252b5132 RH |
561 | } |
562 | ||
563 | /* Prevent remove_output from doing anything, after a successful link. */ | |
564 | output_filename = NULL; | |
565 | ||
566 | xexit (0); | |
567 | return 0; | |
568 | } | |
569 | ||
e2243057 RS |
570 | /* If the configured sysroot is relocatable, try relocating it based on |
571 | default prefix FROM. Return the relocated directory if it exists, | |
572 | otherwise return null. */ | |
573 | ||
574 | static char * | |
575 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
576 | { | |
577 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
578 | char *path; | |
579 | struct stat s; | |
580 | ||
581 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
582 | if (path) | |
583 | { | |
584 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
585 | return path; | |
586 | free (path); | |
587 | } | |
588 | #endif | |
589 | return 0; | |
590 | } | |
591 | ||
592 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
593 | ||
594 | static const char * | |
595 | get_sysroot (int argc, char **argv) | |
596 | { | |
597 | int i; | |
598 | const char *path; | |
599 | ||
600 | for (i = 1; i < argc; i++) | |
0112cd26 | 601 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
602 | return argv[i] + strlen ("--sysroot="); |
603 | ||
604 | path = get_relative_sysroot (BINDIR); | |
605 | if (path) | |
606 | return path; | |
607 | ||
608 | path = get_relative_sysroot (TOOLBINDIR); | |
609 | if (path) | |
610 | return path; | |
611 | ||
612 | return TARGET_SYSTEM_ROOT; | |
613 | } | |
614 | ||
252b5132 RH |
615 | /* We need to find any explicitly given emulation in order to initialize the |
616 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
617 | ||
618 | static char * | |
1579bae1 | 619 | get_emulation (int argc, char **argv) |
252b5132 RH |
620 | { |
621 | char *emulation; | |
622 | int i; | |
623 | ||
624 | emulation = getenv (EMULATION_ENVIRON); | |
625 | if (emulation == NULL) | |
626 | emulation = DEFAULT_EMULATION; | |
627 | ||
628 | for (i = 1; i < argc; i++) | |
629 | { | |
0112cd26 | 630 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
631 | { |
632 | if (argv[i][2] == '\0') | |
633 | { | |
634 | /* -m EMUL */ | |
635 | if (i < argc - 1) | |
636 | { | |
637 | emulation = argv[i + 1]; | |
638 | i++; | |
639 | } | |
640 | else | |
0125cdf2 | 641 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
642 | } |
643 | else if (strcmp (argv[i], "-mips1") == 0 | |
644 | || strcmp (argv[i], "-mips2") == 0 | |
645 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 646 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
647 | || strcmp (argv[i], "-mips5") == 0 |
648 | || strcmp (argv[i], "-mips32") == 0 | |
649 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
650 | || strcmp (argv[i], "-mips64") == 0 |
651 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 652 | { |
31d677f9 | 653 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
654 | passed to the linker by some MIPS compilers. They |
655 | generally tell the linker to use a slightly different | |
656 | library path. Perhaps someday these should be | |
657 | implemented as emulations; until then, we just ignore | |
658 | the arguments and hope that nobody ever creates | |
659 | emulations named ips1, ips2 or ips3. */ | |
660 | } | |
661 | else if (strcmp (argv[i], "-m486") == 0) | |
662 | { | |
663 | /* FIXME: The argument -m486 is passed to the linker on | |
664 | some Linux systems. Hope that nobody creates an | |
665 | emulation named 486. */ | |
666 | } | |
667 | else | |
668 | { | |
669 | /* -mEMUL */ | |
670 | emulation = &argv[i][2]; | |
671 | } | |
672 | } | |
673 | } | |
674 | ||
675 | return emulation; | |
676 | } | |
677 | ||
252b5132 | 678 | void |
1579bae1 | 679 | add_ysym (const char *name) |
252b5132 | 680 | { |
1579bae1 | 681 | if (link_info.notice_hash == NULL) |
252b5132 | 682 | { |
1e9cc1c2 NC |
683 | link_info.notice_hash = |
684 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
685 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
686 | bfd_hash_newfunc, | |
687 | sizeof (struct bfd_hash_entry), | |
688 | 61)) | |
252b5132 | 689 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 690 | } |
252b5132 | 691 | |
1579bae1 | 692 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
693 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
694 | } | |
695 | ||
696 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
697 | ||
698 | void | |
1579bae1 | 699 | add_wrap (const char *name) |
252b5132 RH |
700 | { |
701 | if (link_info.wrap_hash == NULL) | |
702 | { | |
1e9cc1c2 NC |
703 | link_info.wrap_hash = |
704 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
705 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
706 | bfd_hash_newfunc, | |
707 | sizeof (struct bfd_hash_entry), | |
708 | 61)) | |
252b5132 RH |
709 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
710 | } | |
0125cdf2 | 711 | |
b34976b6 | 712 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
713 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
714 | } | |
715 | ||
716 | /* Handle the -retain-symbols-file option. */ | |
717 | ||
718 | void | |
1579bae1 | 719 | add_keepsyms_file (const char *filename) |
252b5132 RH |
720 | { |
721 | FILE *file; | |
722 | char *buf; | |
723 | size_t bufsize; | |
724 | int c; | |
725 | ||
726 | if (link_info.strip == strip_some) | |
727 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
728 | ||
729 | file = fopen (filename, "r"); | |
1579bae1 | 730 | if (file == NULL) |
252b5132 RH |
731 | { |
732 | bfd_set_error (bfd_error_system_call); | |
733 | einfo ("%X%P: %s: %E\n", filename); | |
734 | return; | |
735 | } | |
736 | ||
1e9cc1c2 NC |
737 | link_info.keep_hash = (struct bfd_hash_table *) |
738 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
739 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
740 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
741 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
742 | ||
743 | bufsize = 100; | |
1e9cc1c2 | 744 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
745 | |
746 | c = getc (file); | |
747 | while (c != EOF) | |
748 | { | |
3882b010 | 749 | while (ISSPACE (c)) |
252b5132 RH |
750 | c = getc (file); |
751 | ||
752 | if (c != EOF) | |
753 | { | |
754 | size_t len = 0; | |
755 | ||
3882b010 | 756 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
757 | { |
758 | buf[len] = c; | |
759 | ++len; | |
760 | if (len >= bufsize) | |
761 | { | |
762 | bufsize *= 2; | |
1e9cc1c2 | 763 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
764 | } |
765 | c = getc (file); | |
766 | } | |
767 | ||
768 | buf[len] = '\0'; | |
769 | ||
1579bae1 | 770 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
771 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
772 | } | |
773 | } | |
774 | ||
775 | if (link_info.strip != strip_none) | |
776 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
777 | ||
5ed6aba4 | 778 | free (buf); |
252b5132 RH |
779 | link_info.strip = strip_some; |
780 | } | |
781 | \f | |
782 | /* Callbacks from the BFD linker routines. */ | |
783 | ||
784 | /* This is called when BFD has decided to include an archive member in | |
785 | a link. */ | |
786 | ||
b34976b6 | 787 | static bfd_boolean |
e1fffbe6 | 788 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 789 | bfd *abfd, |
5d3236ee DK |
790 | const char *name, |
791 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
792 | { |
793 | lang_input_statement_type *input; | |
5d3236ee | 794 | lang_input_statement_type orig_input; |
252b5132 | 795 | |
1e9cc1c2 NC |
796 | input = (lang_input_statement_type *) |
797 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
798 | input->filename = abfd->filename; |
799 | input->local_sym_name = abfd->filename; | |
800 | input->the_bfd = abfd; | |
252b5132 | 801 | |
5d3236ee DK |
802 | /* Save the original data for trace files/tries below, as plugins |
803 | (if enabled) may possibly alter it to point to a replacement | |
804 | BFD, but we still want to output the original BFD filename. */ | |
805 | orig_input = *input; | |
806 | #ifdef ENABLE_PLUGINS | |
d44ad554 | 807 | if (bfd_my_archive (abfd) != NULL && plugin_active_plugins_p ()) |
5d3236ee DK |
808 | { |
809 | /* We must offer this archive member to the plugins to claim. */ | |
810 | int fd = open (bfd_my_archive (abfd)->filename, O_RDONLY | O_BINARY); | |
811 | if (fd >= 0) | |
812 | { | |
813 | struct ld_plugin_input_file file; | |
814 | int claimed = 0; | |
815 | /* Offset and filesize must refer to the individual archive | |
816 | member, not the whole file, and must exclude the header. | |
817 | Fortunately for us, that is how the data is stored in the | |
818 | origin field of the bfd and in the arelt_data. */ | |
819 | file.name = bfd_my_archive (abfd)->filename; | |
820 | file.offset = abfd->origin; | |
821 | file.filesize = arelt_size (abfd); | |
822 | file.fd = fd; | |
823 | /* We create a dummy BFD, initially empty, to house | |
824 | whatever symbols the plugin may want to add. */ | |
825 | file.handle = plugin_get_ir_dummy_bfd (abfd->filename, abfd); | |
826 | if (plugin_call_claim_file (&file, &claimed)) | |
827 | einfo (_("%P%F: %s: plugin reported error claiming file\n"), | |
f84854b6 | 828 | plugin_error_plugin ()); |
d44ad554 DK |
829 | /* fd belongs to us, not the plugin; but we don't need it. */ |
830 | close (fd); | |
5d3236ee DK |
831 | if (claimed) |
832 | { | |
833 | /* Substitute the dummy BFD. */ | |
834 | input->the_bfd = file.handle; | |
835 | input->claimed = TRUE; | |
8543fde5 | 836 | input->claim_archive = TRUE; |
5d3236ee DK |
837 | bfd_make_readable (input->the_bfd); |
838 | *subsbfd = input->the_bfd; | |
839 | } | |
840 | else | |
841 | { | |
842 | /* Abandon the dummy BFD. */ | |
843 | bfd_close_all_done (file.handle); | |
5d3236ee DK |
844 | input->claimed = FALSE; |
845 | } | |
846 | } | |
847 | } | |
848 | #endif /* ENABLE_PLUGINS */ | |
849 | ||
252b5132 RH |
850 | ldlang_add_file (input); |
851 | ||
1579bae1 | 852 | if (config.map_file != NULL) |
252b5132 | 853 | { |
b34976b6 | 854 | static bfd_boolean header_printed; |
252b5132 RH |
855 | struct bfd_link_hash_entry *h; |
856 | bfd *from; | |
857 | int len; | |
858 | ||
e1fffbe6 | 859 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
860 | |
861 | if (h == NULL) | |
862 | from = NULL; | |
863 | else | |
864 | { | |
865 | switch (h->type) | |
866 | { | |
867 | default: | |
868 | from = NULL; | |
869 | break; | |
870 | ||
871 | case bfd_link_hash_defined: | |
872 | case bfd_link_hash_defweak: | |
873 | from = h->u.def.section->owner; | |
874 | break; | |
875 | ||
876 | case bfd_link_hash_undefined: | |
877 | case bfd_link_hash_undefweak: | |
878 | from = h->u.undef.abfd; | |
879 | break; | |
880 | ||
881 | case bfd_link_hash_common: | |
882 | from = h->u.c.p->section->owner; | |
883 | break; | |
884 | } | |
885 | } | |
886 | ||
887 | if (! header_printed) | |
888 | { | |
889 | char buf[100]; | |
890 | ||
e3c8793a | 891 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 892 | minfo ("%s", buf); |
b34976b6 | 893 | header_printed = TRUE; |
252b5132 RH |
894 | } |
895 | ||
896 | if (bfd_my_archive (abfd) == NULL) | |
897 | { | |
898 | minfo ("%s", bfd_get_filename (abfd)); | |
899 | len = strlen (bfd_get_filename (abfd)); | |
900 | } | |
901 | else | |
902 | { | |
903 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
904 | bfd_get_filename (abfd)); | |
905 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
906 | + strlen (bfd_get_filename (abfd)) | |
907 | + 2); | |
908 | } | |
909 | ||
910 | if (len >= 29) | |
911 | { | |
912 | print_nl (); | |
913 | len = 0; | |
914 | } | |
915 | while (len < 30) | |
916 | { | |
917 | print_space (); | |
918 | ++len; | |
919 | } | |
920 | ||
921 | if (from != NULL) | |
922 | minfo ("%B ", from); | |
923 | if (h != NULL) | |
924 | minfo ("(%T)\n", h->root.string); | |
925 | else | |
926 | minfo ("(%s)\n", name); | |
927 | } | |
928 | ||
929 | if (trace_files || trace_file_tries) | |
5d3236ee | 930 | info_msg ("%I\n", &orig_input); |
b34976b6 | 931 | return TRUE; |
252b5132 RH |
932 | } |
933 | ||
934 | /* This is called when BFD has discovered a symbol which is defined | |
935 | multiple times. */ | |
936 | ||
b34976b6 | 937 | static bfd_boolean |
1579bae1 AM |
938 | multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
939 | const char *name, | |
940 | bfd *obfd, | |
941 | asection *osec, | |
942 | bfd_vma oval, | |
943 | bfd *nbfd, | |
944 | asection *nsec, | |
945 | bfd_vma nval) | |
252b5132 | 946 | { |
5d3236ee DK |
947 | #ifdef ENABLE_PLUGINS |
948 | /* We may get called back even when --allow-multiple-definition is in | |
949 | effect, as the plugin infrastructure needs to use this hook in | |
950 | order to swap out IR-only symbols for real ones. In that case, | |
951 | it will let us know not to continue by returning TRUE even if this | |
952 | is not an IR-only vs. non-IR symbol conflict. */ | |
953 | if (plugin_multiple_definition (info, name, obfd, osec, oval, nbfd, | |
f84854b6 | 954 | nsec, nval)) |
5d3236ee DK |
955 | return TRUE; |
956 | #endif /* ENABLE_PLUGINS */ | |
957 | ||
252b5132 RH |
958 | /* If either section has the output_section field set to |
959 | bfd_abs_section_ptr, it means that the section is being | |
960 | discarded, and this is not really a multiple definition at all. | |
f84854b6 L |
961 | FIXME: It would be cleaner to somehow ignore symbols defined in |
962 | sections which are being discarded. */ | |
252b5132 RH |
963 | if ((osec->output_section != NULL |
964 | && ! bfd_is_abs_section (osec) | |
965 | && bfd_is_abs_section (osec->output_section)) | |
966 | || (nsec->output_section != NULL | |
967 | && ! bfd_is_abs_section (nsec) | |
968 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 969 | return TRUE; |
252b5132 RH |
970 | |
971 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
972 | nbfd, nsec, nval, name); | |
1579bae1 | 973 | if (obfd != NULL) |
252b5132 | 974 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 975 | |
28d5f677 | 976 | if (RELAXATION_ENABLED) |
9b14b192 NC |
977 | { |
978 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
28d5f677 | 979 | command_line.disable_target_specific_optimizations = -1; |
9b14b192 | 980 | } |
6d5e62f8 | 981 | |
b34976b6 | 982 | return TRUE; |
252b5132 RH |
983 | } |
984 | ||
985 | /* This is called when there is a definition of a common symbol, or | |
986 | when a common symbol is found for a symbol that is already defined, | |
987 | or when two common symbols are found. We only do something if | |
988 | -warn-common was used. */ | |
989 | ||
b34976b6 | 990 | static bfd_boolean |
1579bae1 AM |
991 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
992 | const char *name, | |
993 | bfd *obfd, | |
994 | enum bfd_link_hash_type otype, | |
995 | bfd_vma osize, | |
996 | bfd *nbfd, | |
997 | enum bfd_link_hash_type ntype, | |
998 | bfd_vma nsize) | |
252b5132 RH |
999 | { |
1000 | if (! config.warn_common) | |
b34976b6 | 1001 | return TRUE; |
252b5132 RH |
1002 | |
1003 | if (ntype == bfd_link_hash_defined | |
1004 | || ntype == bfd_link_hash_defweak | |
1005 | || ntype == bfd_link_hash_indirect) | |
1006 | { | |
1007 | ASSERT (otype == bfd_link_hash_common); | |
1008 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1009 | nbfd, name); | |
1010 | if (obfd != NULL) | |
1011 | einfo (_("%B: warning: common is here\n"), obfd); | |
1012 | } | |
1013 | else if (otype == bfd_link_hash_defined | |
1014 | || otype == bfd_link_hash_defweak | |
1015 | || otype == bfd_link_hash_indirect) | |
1016 | { | |
1017 | ASSERT (ntype == bfd_link_hash_common); | |
1018 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1019 | nbfd, name); | |
1020 | if (obfd != NULL) | |
1021 | einfo (_("%B: warning: defined here\n"), obfd); | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1026 | if (osize > nsize) | |
1027 | { | |
1028 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1029 | nbfd, name); | |
1030 | if (obfd != NULL) | |
1031 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1032 | } | |
1033 | else if (nsize > osize) | |
1034 | { | |
1035 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1036 | nbfd, name); | |
1037 | if (obfd != NULL) | |
1038 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1039 | } | |
1040 | else | |
1041 | { | |
1042 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1043 | if (obfd != NULL) | |
1044 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1045 | } | |
1046 | } | |
1047 | ||
b34976b6 | 1048 | return TRUE; |
252b5132 RH |
1049 | } |
1050 | ||
1051 | /* This is called when BFD has discovered a set element. H is the | |
1052 | entry in the linker hash table for the set. SECTION and VALUE | |
1053 | represent a value which should be added to the set. */ | |
1054 | ||
b34976b6 | 1055 | static bfd_boolean |
1579bae1 AM |
1056 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1057 | struct bfd_link_hash_entry *h, | |
1058 | bfd_reloc_code_real_type reloc, | |
1059 | bfd *abfd, | |
1060 | asection *section, | |
1061 | bfd_vma value) | |
252b5132 RH |
1062 | { |
1063 | if (config.warn_constructors) | |
1064 | einfo (_("%P: warning: global constructor %s used\n"), | |
1065 | h->root.string); | |
1066 | ||
1067 | if (! config.build_constructors) | |
b34976b6 | 1068 | return TRUE; |
252b5132 | 1069 | |
1579bae1 | 1070 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1071 | |
1072 | if (h->type == bfd_link_hash_new) | |
1073 | { | |
1074 | h->type = bfd_link_hash_undefined; | |
1075 | h->u.undef.abfd = abfd; | |
1076 | /* We don't call bfd_link_add_undef to add this to the list of | |
1077 | undefined symbols because we are going to define it | |
1078 | ourselves. */ | |
1079 | } | |
1080 | ||
b34976b6 | 1081 | return TRUE; |
252b5132 RH |
1082 | } |
1083 | ||
1084 | /* This is called when BFD has discovered a constructor. This is only | |
1085 | called for some object file formats--those which do not handle | |
1086 | constructors in some more clever fashion. This is similar to | |
1087 | adding an element to a set, but less general. */ | |
1088 | ||
b34976b6 | 1089 | static bfd_boolean |
1579bae1 AM |
1090 | constructor_callback (struct bfd_link_info *info, |
1091 | bfd_boolean constructor, | |
1092 | const char *name, | |
1093 | bfd *abfd, | |
1094 | asection *section, | |
1095 | bfd_vma value) | |
252b5132 RH |
1096 | { |
1097 | char *s; | |
1098 | struct bfd_link_hash_entry *h; | |
1099 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1100 | ||
1101 | if (config.warn_constructors) | |
1102 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1103 | ||
1104 | if (! config.build_constructors) | |
b34976b6 | 1105 | return TRUE; |
252b5132 RH |
1106 | |
1107 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1108 | useful error message. */ | |
f13a99db | 1109 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1110 | && (info->relocatable |
252b5132 RH |
1111 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1112 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1113 | ||
1114 | s = set_name; | |
1115 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1116 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1117 | if (constructor) | |
1118 | strcpy (s, "__CTOR_LIST__"); | |
1119 | else | |
1120 | strcpy (s, "__DTOR_LIST__"); | |
1121 | ||
b34976b6 | 1122 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1123 | if (h == (struct bfd_link_hash_entry *) NULL) |
1124 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1125 | if (h->type == bfd_link_hash_new) | |
1126 | { | |
1127 | h->type = bfd_link_hash_undefined; | |
1128 | h->u.undef.abfd = abfd; | |
1129 | /* We don't call bfd_link_add_undef to add this to the list of | |
1130 | undefined symbols because we are going to define it | |
1131 | ourselves. */ | |
1132 | } | |
1133 | ||
1134 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1135 | return TRUE; |
252b5132 RH |
1136 | } |
1137 | ||
1138 | /* A structure used by warning_callback to pass information through | |
1139 | bfd_map_over_sections. */ | |
1140 | ||
0125cdf2 NC |
1141 | struct warning_callback_info |
1142 | { | |
b34976b6 | 1143 | bfd_boolean found; |
252b5132 RH |
1144 | const char *warning; |
1145 | const char *symbol; | |
1146 | asymbol **asymbols; | |
1147 | }; | |
1148 | ||
1149 | /* This is called when there is a reference to a warning symbol. */ | |
1150 | ||
b34976b6 | 1151 | static bfd_boolean |
1579bae1 AM |
1152 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1153 | const char *warning, | |
1154 | const char *symbol, | |
1155 | bfd *abfd, | |
1156 | asection *section, | |
1157 | bfd_vma address) | |
252b5132 RH |
1158 | { |
1159 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1160 | have a cleaner interface, but what? */ | |
1161 | if (! config.warn_multiple_gp | |
1162 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1163 | return TRUE; |
252b5132 RH |
1164 | |
1165 | if (section != NULL) | |
300475fe | 1166 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1167 | else if (abfd == NULL) |
300475fe | 1168 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1169 | else if (symbol == NULL) |
300475fe | 1170 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1171 | else |
1172 | { | |
91d6fa6a | 1173 | struct warning_callback_info cinfo; |
252b5132 RH |
1174 | |
1175 | /* Look through the relocs to see if we can find a plausible | |
1176 | address. */ | |
5c1d2f5f AM |
1177 | |
1178 | if (!bfd_generic_link_read_symbols (abfd)) | |
1179 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1180 | |
91d6fa6a NC |
1181 | cinfo.found = FALSE; |
1182 | cinfo.warning = warning; | |
1183 | cinfo.symbol = symbol; | |
1184 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1185 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
252b5132 | 1186 | |
91d6fa6a | 1187 | if (! cinfo.found) |
300475fe | 1188 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1189 | } |
1190 | ||
b34976b6 | 1191 | return TRUE; |
252b5132 RH |
1192 | } |
1193 | ||
1194 | /* This is called by warning_callback for each section. It checks the | |
1195 | relocs of the section to see if it can find a reference to the | |
1196 | symbol which triggered the warning. If it can, it uses the reloc | |
1197 | to give an error message with a file and line number. */ | |
1198 | ||
1199 | static void | |
1579bae1 | 1200 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1201 | { |
1e9cc1c2 | 1202 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1203 | long relsize; |
1204 | arelent **relpp; | |
1205 | long relcount; | |
1206 | arelent **p, **pend; | |
1207 | ||
1208 | if (info->found) | |
1209 | return; | |
1210 | ||
1211 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1212 | if (relsize < 0) | |
1213 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1214 | if (relsize == 0) | |
1215 | return; | |
1216 | ||
1e9cc1c2 | 1217 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1218 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1219 | if (relcount < 0) | |
1220 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1221 | ||
1222 | p = relpp; | |
1223 | pend = p + relcount; | |
1224 | for (; p < pend && *p != NULL; p++) | |
1225 | { | |
1226 | arelent *q = *p; | |
1227 | ||
1228 | if (q->sym_ptr_ptr != NULL | |
1229 | && *q->sym_ptr_ptr != NULL | |
1230 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1231 | { | |
1232 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1233 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1234 | info->warning); | |
b34976b6 | 1235 | info->found = TRUE; |
252b5132 RH |
1236 | break; |
1237 | } | |
1238 | } | |
1239 | ||
1240 | free (relpp); | |
1241 | } | |
1242 | ||
1243 | /* This is called when an undefined symbol is found. */ | |
1244 | ||
b34976b6 | 1245 | static bfd_boolean |
1579bae1 AM |
1246 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1247 | const char *name, | |
1248 | bfd *abfd, | |
1249 | asection *section, | |
1250 | bfd_vma address, | |
0b28295d | 1251 | bfd_boolean error) |
252b5132 RH |
1252 | { |
1253 | static char *error_name; | |
1254 | static unsigned int error_count; | |
1255 | ||
1256 | #define MAX_ERRORS_IN_A_ROW 5 | |
1257 | ||
1258 | if (config.warn_once) | |
1259 | { | |
1260 | static struct bfd_hash_table *hash; | |
1261 | ||
1262 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1263 | if (hash == NULL) |
1264 | { | |
1e9cc1c2 NC |
1265 | hash = (struct bfd_hash_table *) |
1266 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
1267 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1268 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1269 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1270 | } | |
1271 | ||
b34976b6 AM |
1272 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1273 | return TRUE; | |
252b5132 | 1274 | |
b34976b6 | 1275 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1276 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1277 | } | |
1278 | ||
1279 | /* We never print more than a reasonable number of errors in a row | |
1280 | for a single symbol. */ | |
1579bae1 | 1281 | if (error_name != NULL |
252b5132 RH |
1282 | && strcmp (name, error_name) == 0) |
1283 | ++error_count; | |
1284 | else | |
1285 | { | |
1286 | error_count = 0; | |
1579bae1 | 1287 | if (error_name != NULL) |
252b5132 | 1288 | free (error_name); |
d1b2b2dc | 1289 | error_name = xstrdup (name); |
252b5132 RH |
1290 | } |
1291 | ||
1292 | if (section != NULL) | |
1293 | { | |
1294 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1295 | { |
0b28295d ILT |
1296 | if (error) |
1297 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1298 | abfd, section, address, name); | |
1299 | else | |
1300 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1301 | abfd, section, address, name); | |
b6f29aaa | 1302 | } |
252b5132 | 1303 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1304 | { |
1305 | if (error) | |
1306 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1307 | abfd, section, address, name); | |
1308 | else | |
1309 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1310 | abfd, section, address, name); | |
1311 | } | |
1312 | else if (error) | |
1313 | einfo ("%X"); | |
252b5132 RH |
1314 | } |
1315 | else | |
1316 | { | |
1317 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1318 | { |
0b28295d ILT |
1319 | if (error) |
1320 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1321 | abfd, name); | |
1322 | else | |
1323 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1324 | abfd, name); | |
b6f29aaa | 1325 | } |
252b5132 | 1326 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1327 | { |
1328 | if (error) | |
1329 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1330 | abfd, name); | |
1331 | else | |
1332 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1333 | abfd, name); | |
1334 | } | |
1335 | else if (error) | |
1336 | einfo ("%X"); | |
252b5132 RH |
1337 | } |
1338 | ||
b34976b6 | 1339 | return TRUE; |
252b5132 RH |
1340 | } |
1341 | ||
8aae64e6 AO |
1342 | /* Counter to limit the number of relocation overflow error messages |
1343 | to print. Errors are printed as it is decremented. When it's | |
1344 | called and the counter is zero, a final message is printed | |
1345 | indicating more relocations were omitted. When it gets to -1, no | |
1346 | such errors are printed. If it's initially set to a value less | |
1347 | than -1, all such errors will be printed (--verbose does this). */ | |
1348 | ||
1349 | int overflow_cutoff_limit = 10; | |
1350 | ||
252b5132 RH |
1351 | /* This is called when a reloc overflows. */ |
1352 | ||
b34976b6 | 1353 | static bfd_boolean |
1579bae1 | 1354 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1355 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1356 | const char *name, |
1357 | const char *reloc_name, | |
1358 | bfd_vma addend, | |
1359 | bfd *abfd, | |
1360 | asection *section, | |
1361 | bfd_vma address) | |
252b5132 | 1362 | { |
8aae64e6 AO |
1363 | if (overflow_cutoff_limit == -1) |
1364 | return TRUE; | |
1365 | ||
e1fffbe6 | 1366 | einfo ("%X%C:", abfd, section, address); |
8aae64e6 AO |
1367 | |
1368 | if (overflow_cutoff_limit >= 0 | |
1369 | && overflow_cutoff_limit-- == 0) | |
1370 | { | |
1371 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1372 | return TRUE; | |
1373 | } | |
1374 | ||
dfeffb9f L |
1375 | if (entry) |
1376 | { | |
1377 | while (entry->type == bfd_link_hash_indirect | |
1378 | || entry->type == bfd_link_hash_warning) | |
1379 | entry = entry->u.i.link; | |
1380 | switch (entry->type) | |
1381 | { | |
1382 | case bfd_link_hash_undefined: | |
1383 | case bfd_link_hash_undefweak: | |
1384 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1385 | reloc_name, entry->root.string); | |
1386 | break; | |
1387 | case bfd_link_hash_defined: | |
1388 | case bfd_link_hash_defweak: | |
1389 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1390 | reloc_name, entry->root.string, | |
a6e1b90f L |
1391 | entry->u.def.section, |
1392 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1393 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1394 | break; |
1395 | default: | |
1396 | abort (); | |
1397 | break; | |
1398 | } | |
1399 | } | |
1400 | else | |
1401 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1402 | reloc_name, name); | |
252b5132 RH |
1403 | if (addend != 0) |
1404 | einfo ("+%v", addend); | |
1405 | einfo ("\n"); | |
b34976b6 | 1406 | return TRUE; |
252b5132 RH |
1407 | } |
1408 | ||
1409 | /* This is called when a dangerous relocation is made. */ | |
1410 | ||
b34976b6 | 1411 | static bfd_boolean |
1579bae1 AM |
1412 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1413 | const char *message, | |
1414 | bfd *abfd, | |
1415 | asection *section, | |
1416 | bfd_vma address) | |
252b5132 | 1417 | { |
e1fffbe6 AM |
1418 | einfo (_("%X%C: dangerous relocation: %s\n"), |
1419 | abfd, section, address, message); | |
b34976b6 | 1420 | return TRUE; |
252b5132 RH |
1421 | } |
1422 | ||
1423 | /* This is called when a reloc is being generated attached to a symbol | |
1424 | that is not being output. */ | |
1425 | ||
b34976b6 | 1426 | static bfd_boolean |
1579bae1 AM |
1427 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1428 | const char *name, | |
1429 | bfd *abfd, | |
1430 | asection *section, | |
1431 | bfd_vma address) | |
252b5132 | 1432 | { |
e1fffbe6 AM |
1433 | einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), |
1434 | abfd, section, address, name); | |
b34976b6 | 1435 | return TRUE; |
252b5132 RH |
1436 | } |
1437 | ||
1438 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1439 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1440 | using the -y option, while notice_all is set if the --cref option |
1441 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1442 | linker script; and if plugins are active, since they need to monitor | |
1443 | all references from non-IR files. */ | |
252b5132 | 1444 | |
b34976b6 | 1445 | static bfd_boolean |
1579bae1 AM |
1446 | notice (struct bfd_link_info *info, |
1447 | const char *name, | |
1448 | bfd *abfd, | |
1449 | asection *section, | |
1450 | bfd_vma value) | |
252b5132 | 1451 | { |
5061a885 AM |
1452 | if (name == NULL) |
1453 | { | |
1454 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1455 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1456 | return TRUE; |
1457 | } | |
1458 | ||
5d3236ee DK |
1459 | #ifdef ENABLE_PLUGINS |
1460 | /* We should hide symbols in the dummy IR BFDs from the nocrossrefs list | |
1461 | and let the real object files that are generated and added later trip | |
1462 | the error instead. Similarly would be better to trace the real symbol | |
1463 | from the real file than the temporary dummy. */ | |
1464 | if (!plugin_notice (info, name, abfd, section, value)) | |
1465 | return TRUE; | |
1466 | #endif /* ENABLE_PLUGINS */ | |
1467 | ||
1468 | if (info->notice_hash != NULL | |
1469 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) | |
252b5132 RH |
1470 | { |
1471 | if (bfd_is_und_section (section)) | |
1472 | einfo ("%B: reference to %s\n", abfd, name); | |
1473 | else | |
1474 | einfo ("%B: definition of %s\n", abfd, name); | |
1475 | } | |
1476 | ||
1477 | if (command_line.cref || nocrossref_list != NULL) | |
1478 | add_cref (name, abfd, section, value); | |
1479 | ||
b34976b6 | 1480 | return TRUE; |
252b5132 | 1481 | } |