Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
aa820537 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
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 | |
1579bae1 | 177 | remove_output (void) |
252b5132 | 178 | { |
6d5e62f8 | 179 | if (output_filename) |
252b5132 | 180 | { |
f13a99db AM |
181 | if (link_info.output_bfd) |
182 | bfd_cache_close (link_info.output_bfd); | |
252b5132 | 183 | if (delete_output_file_on_failure) |
bb14f524 | 184 | unlink_if_ordinary (output_filename); |
252b5132 RH |
185 | } |
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 | ||
214 | xatexit (remove_output); | |
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 | ||
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 | |
560 | } | |
561 | ||
562 | /* Prevent remove_output from doing anything, after a successful link. */ | |
563 | output_filename = NULL; | |
564 | ||
565 | xexit (0); | |
566 | return 0; | |
567 | } | |
568 | ||
e2243057 RS |
569 | /* If the configured sysroot is relocatable, try relocating it based on |
570 | default prefix FROM. Return the relocated directory if it exists, | |
571 | otherwise return null. */ | |
572 | ||
573 | static char * | |
574 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
575 | { | |
576 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
577 | char *path; | |
578 | struct stat s; | |
579 | ||
580 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
581 | if (path) | |
582 | { | |
583 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
584 | return path; | |
585 | free (path); | |
586 | } | |
587 | #endif | |
588 | return 0; | |
589 | } | |
590 | ||
591 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
592 | ||
593 | static const char * | |
594 | get_sysroot (int argc, char **argv) | |
595 | { | |
596 | int i; | |
597 | const char *path; | |
598 | ||
599 | for (i = 1; i < argc; i++) | |
0112cd26 | 600 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
601 | return argv[i] + strlen ("--sysroot="); |
602 | ||
603 | path = get_relative_sysroot (BINDIR); | |
604 | if (path) | |
605 | return path; | |
606 | ||
607 | path = get_relative_sysroot (TOOLBINDIR); | |
608 | if (path) | |
609 | return path; | |
610 | ||
611 | return TARGET_SYSTEM_ROOT; | |
612 | } | |
613 | ||
252b5132 RH |
614 | /* We need to find any explicitly given emulation in order to initialize the |
615 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
616 | ||
617 | static char * | |
1579bae1 | 618 | get_emulation (int argc, char **argv) |
252b5132 RH |
619 | { |
620 | char *emulation; | |
621 | int i; | |
622 | ||
623 | emulation = getenv (EMULATION_ENVIRON); | |
624 | if (emulation == NULL) | |
625 | emulation = DEFAULT_EMULATION; | |
626 | ||
627 | for (i = 1; i < argc; i++) | |
628 | { | |
0112cd26 | 629 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
630 | { |
631 | if (argv[i][2] == '\0') | |
632 | { | |
633 | /* -m EMUL */ | |
634 | if (i < argc - 1) | |
635 | { | |
636 | emulation = argv[i + 1]; | |
637 | i++; | |
638 | } | |
639 | else | |
0125cdf2 | 640 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
641 | } |
642 | else if (strcmp (argv[i], "-mips1") == 0 | |
643 | || strcmp (argv[i], "-mips2") == 0 | |
644 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 645 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
646 | || strcmp (argv[i], "-mips5") == 0 |
647 | || strcmp (argv[i], "-mips32") == 0 | |
648 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
649 | || strcmp (argv[i], "-mips64") == 0 |
650 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 651 | { |
31d677f9 | 652 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
653 | passed to the linker by some MIPS compilers. They |
654 | generally tell the linker to use a slightly different | |
655 | library path. Perhaps someday these should be | |
656 | implemented as emulations; until then, we just ignore | |
657 | the arguments and hope that nobody ever creates | |
658 | emulations named ips1, ips2 or ips3. */ | |
659 | } | |
660 | else if (strcmp (argv[i], "-m486") == 0) | |
661 | { | |
662 | /* FIXME: The argument -m486 is passed to the linker on | |
663 | some Linux systems. Hope that nobody creates an | |
664 | emulation named 486. */ | |
665 | } | |
666 | else | |
667 | { | |
668 | /* -mEMUL */ | |
669 | emulation = &argv[i][2]; | |
670 | } | |
671 | } | |
672 | } | |
673 | ||
674 | return emulation; | |
675 | } | |
676 | ||
252b5132 | 677 | void |
1579bae1 | 678 | add_ysym (const char *name) |
252b5132 | 679 | { |
1579bae1 | 680 | if (link_info.notice_hash == NULL) |
252b5132 | 681 | { |
1e9cc1c2 NC |
682 | link_info.notice_hash = |
683 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
684 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
685 | bfd_hash_newfunc, | |
686 | sizeof (struct bfd_hash_entry), | |
687 | 61)) | |
252b5132 | 688 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 689 | } |
252b5132 | 690 | |
1579bae1 | 691 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
692 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
693 | } | |
694 | ||
695 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
696 | ||
697 | void | |
1579bae1 | 698 | add_wrap (const char *name) |
252b5132 RH |
699 | { |
700 | if (link_info.wrap_hash == NULL) | |
701 | { | |
1e9cc1c2 NC |
702 | link_info.wrap_hash = |
703 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
704 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
705 | bfd_hash_newfunc, | |
706 | sizeof (struct bfd_hash_entry), | |
707 | 61)) | |
252b5132 RH |
708 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
709 | } | |
0125cdf2 | 710 | |
b34976b6 | 711 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
712 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
713 | } | |
714 | ||
715 | /* Handle the -retain-symbols-file option. */ | |
716 | ||
717 | void | |
1579bae1 | 718 | add_keepsyms_file (const char *filename) |
252b5132 RH |
719 | { |
720 | FILE *file; | |
721 | char *buf; | |
722 | size_t bufsize; | |
723 | int c; | |
724 | ||
725 | if (link_info.strip == strip_some) | |
726 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
727 | ||
728 | file = fopen (filename, "r"); | |
1579bae1 | 729 | if (file == NULL) |
252b5132 RH |
730 | { |
731 | bfd_set_error (bfd_error_system_call); | |
732 | einfo ("%X%P: %s: %E\n", filename); | |
733 | return; | |
734 | } | |
735 | ||
1e9cc1c2 NC |
736 | link_info.keep_hash = (struct bfd_hash_table *) |
737 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
738 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
739 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
740 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
741 | ||
742 | bufsize = 100; | |
1e9cc1c2 | 743 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
744 | |
745 | c = getc (file); | |
746 | while (c != EOF) | |
747 | { | |
3882b010 | 748 | while (ISSPACE (c)) |
252b5132 RH |
749 | c = getc (file); |
750 | ||
751 | if (c != EOF) | |
752 | { | |
753 | size_t len = 0; | |
754 | ||
3882b010 | 755 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
756 | { |
757 | buf[len] = c; | |
758 | ++len; | |
759 | if (len >= bufsize) | |
760 | { | |
761 | bufsize *= 2; | |
1e9cc1c2 | 762 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
763 | } |
764 | c = getc (file); | |
765 | } | |
766 | ||
767 | buf[len] = '\0'; | |
768 | ||
1579bae1 | 769 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
770 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
771 | } | |
772 | } | |
773 | ||
774 | if (link_info.strip != strip_none) | |
775 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
776 | ||
5ed6aba4 | 777 | free (buf); |
252b5132 RH |
778 | link_info.strip = strip_some; |
779 | } | |
780 | \f | |
781 | /* Callbacks from the BFD linker routines. */ | |
782 | ||
783 | /* This is called when BFD has decided to include an archive member in | |
784 | a link. */ | |
785 | ||
b34976b6 | 786 | static bfd_boolean |
e1fffbe6 | 787 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 788 | bfd *abfd, |
5d3236ee DK |
789 | const char *name, |
790 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
791 | { |
792 | lang_input_statement_type *input; | |
5d3236ee | 793 | lang_input_statement_type orig_input; |
252b5132 | 794 | |
1e9cc1c2 NC |
795 | input = (lang_input_statement_type *) |
796 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
797 | input->filename = abfd->filename; |
798 | input->local_sym_name = abfd->filename; | |
799 | input->the_bfd = abfd; | |
252b5132 | 800 | |
5d3236ee DK |
801 | /* Save the original data for trace files/tries below, as plugins |
802 | (if enabled) may possibly alter it to point to a replacement | |
803 | BFD, but we still want to output the original BFD filename. */ | |
804 | orig_input = *input; | |
805 | #ifdef ENABLE_PLUGINS | |
d44ad554 | 806 | if (bfd_my_archive (abfd) != NULL && plugin_active_plugins_p ()) |
5d3236ee DK |
807 | { |
808 | /* We must offer this archive member to the plugins to claim. */ | |
809 | int fd = open (bfd_my_archive (abfd)->filename, O_RDONLY | O_BINARY); | |
810 | if (fd >= 0) | |
811 | { | |
812 | struct ld_plugin_input_file file; | |
813 | int claimed = 0; | |
814 | /* Offset and filesize must refer to the individual archive | |
815 | member, not the whole file, and must exclude the header. | |
816 | Fortunately for us, that is how the data is stored in the | |
817 | origin field of the bfd and in the arelt_data. */ | |
818 | file.name = bfd_my_archive (abfd)->filename; | |
819 | file.offset = abfd->origin; | |
820 | file.filesize = arelt_size (abfd); | |
821 | file.fd = fd; | |
822 | /* We create a dummy BFD, initially empty, to house | |
823 | whatever symbols the plugin may want to add. */ | |
824 | file.handle = plugin_get_ir_dummy_bfd (abfd->filename, abfd); | |
825 | if (plugin_call_claim_file (&file, &claimed)) | |
826 | einfo (_("%P%F: %s: plugin reported error claiming file\n"), | |
f84854b6 | 827 | plugin_error_plugin ()); |
d44ad554 DK |
828 | /* fd belongs to us, not the plugin; but we don't need it. */ |
829 | close (fd); | |
5d3236ee DK |
830 | if (claimed) |
831 | { | |
832 | /* Substitute the dummy BFD. */ | |
833 | input->the_bfd = file.handle; | |
834 | input->claimed = TRUE; | |
835 | bfd_make_readable (input->the_bfd); | |
836 | *subsbfd = input->the_bfd; | |
837 | } | |
838 | else | |
839 | { | |
840 | /* Abandon the dummy BFD. */ | |
841 | bfd_close_all_done (file.handle); | |
5d3236ee DK |
842 | input->claimed = FALSE; |
843 | } | |
844 | } | |
845 | } | |
846 | #endif /* ENABLE_PLUGINS */ | |
847 | ||
252b5132 RH |
848 | ldlang_add_file (input); |
849 | ||
1579bae1 | 850 | if (config.map_file != NULL) |
252b5132 | 851 | { |
b34976b6 | 852 | static bfd_boolean header_printed; |
252b5132 RH |
853 | struct bfd_link_hash_entry *h; |
854 | bfd *from; | |
855 | int len; | |
856 | ||
e1fffbe6 | 857 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
858 | |
859 | if (h == NULL) | |
860 | from = NULL; | |
861 | else | |
862 | { | |
863 | switch (h->type) | |
864 | { | |
865 | default: | |
866 | from = NULL; | |
867 | break; | |
868 | ||
869 | case bfd_link_hash_defined: | |
870 | case bfd_link_hash_defweak: | |
871 | from = h->u.def.section->owner; | |
872 | break; | |
873 | ||
874 | case bfd_link_hash_undefined: | |
875 | case bfd_link_hash_undefweak: | |
876 | from = h->u.undef.abfd; | |
877 | break; | |
878 | ||
879 | case bfd_link_hash_common: | |
880 | from = h->u.c.p->section->owner; | |
881 | break; | |
882 | } | |
883 | } | |
884 | ||
885 | if (! header_printed) | |
886 | { | |
887 | char buf[100]; | |
888 | ||
e3c8793a | 889 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 890 | minfo ("%s", buf); |
b34976b6 | 891 | header_printed = TRUE; |
252b5132 RH |
892 | } |
893 | ||
894 | if (bfd_my_archive (abfd) == NULL) | |
895 | { | |
896 | minfo ("%s", bfd_get_filename (abfd)); | |
897 | len = strlen (bfd_get_filename (abfd)); | |
898 | } | |
899 | else | |
900 | { | |
901 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
902 | bfd_get_filename (abfd)); | |
903 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
904 | + strlen (bfd_get_filename (abfd)) | |
905 | + 2); | |
906 | } | |
907 | ||
908 | if (len >= 29) | |
909 | { | |
910 | print_nl (); | |
911 | len = 0; | |
912 | } | |
913 | while (len < 30) | |
914 | { | |
915 | print_space (); | |
916 | ++len; | |
917 | } | |
918 | ||
919 | if (from != NULL) | |
920 | minfo ("%B ", from); | |
921 | if (h != NULL) | |
922 | minfo ("(%T)\n", h->root.string); | |
923 | else | |
924 | minfo ("(%s)\n", name); | |
925 | } | |
926 | ||
927 | if (trace_files || trace_file_tries) | |
5d3236ee | 928 | info_msg ("%I\n", &orig_input); |
b34976b6 | 929 | return TRUE; |
252b5132 RH |
930 | } |
931 | ||
932 | /* This is called when BFD has discovered a symbol which is defined | |
933 | multiple times. */ | |
934 | ||
b34976b6 | 935 | static bfd_boolean |
1579bae1 AM |
936 | multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
937 | const char *name, | |
938 | bfd *obfd, | |
939 | asection *osec, | |
940 | bfd_vma oval, | |
941 | bfd *nbfd, | |
942 | asection *nsec, | |
943 | bfd_vma nval) | |
252b5132 | 944 | { |
5d3236ee DK |
945 | #ifdef ENABLE_PLUGINS |
946 | /* We may get called back even when --allow-multiple-definition is in | |
947 | effect, as the plugin infrastructure needs to use this hook in | |
948 | order to swap out IR-only symbols for real ones. In that case, | |
949 | it will let us know not to continue by returning TRUE even if this | |
950 | is not an IR-only vs. non-IR symbol conflict. */ | |
951 | if (plugin_multiple_definition (info, name, obfd, osec, oval, nbfd, | |
f84854b6 | 952 | nsec, nval)) |
5d3236ee DK |
953 | return TRUE; |
954 | #endif /* ENABLE_PLUGINS */ | |
955 | ||
252b5132 RH |
956 | /* If either section has the output_section field set to |
957 | bfd_abs_section_ptr, it means that the section is being | |
958 | discarded, and this is not really a multiple definition at all. | |
f84854b6 L |
959 | FIXME: It would be cleaner to somehow ignore symbols defined in |
960 | sections which are being discarded. */ | |
252b5132 RH |
961 | if ((osec->output_section != NULL |
962 | && ! bfd_is_abs_section (osec) | |
963 | && bfd_is_abs_section (osec->output_section)) | |
964 | || (nsec->output_section != NULL | |
965 | && ! bfd_is_abs_section (nsec) | |
966 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 967 | return TRUE; |
252b5132 RH |
968 | |
969 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
970 | nbfd, nsec, nval, name); | |
1579bae1 | 971 | if (obfd != NULL) |
252b5132 | 972 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 973 | |
28d5f677 | 974 | if (RELAXATION_ENABLED) |
9b14b192 NC |
975 | { |
976 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
28d5f677 | 977 | command_line.disable_target_specific_optimizations = -1; |
9b14b192 | 978 | } |
6d5e62f8 | 979 | |
b34976b6 | 980 | return TRUE; |
252b5132 RH |
981 | } |
982 | ||
983 | /* This is called when there is a definition of a common symbol, or | |
984 | when a common symbol is found for a symbol that is already defined, | |
985 | or when two common symbols are found. We only do something if | |
986 | -warn-common was used. */ | |
987 | ||
b34976b6 | 988 | static bfd_boolean |
1579bae1 AM |
989 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
990 | const char *name, | |
991 | bfd *obfd, | |
992 | enum bfd_link_hash_type otype, | |
993 | bfd_vma osize, | |
994 | bfd *nbfd, | |
995 | enum bfd_link_hash_type ntype, | |
996 | bfd_vma nsize) | |
252b5132 RH |
997 | { |
998 | if (! config.warn_common) | |
b34976b6 | 999 | return TRUE; |
252b5132 RH |
1000 | |
1001 | if (ntype == bfd_link_hash_defined | |
1002 | || ntype == bfd_link_hash_defweak | |
1003 | || ntype == bfd_link_hash_indirect) | |
1004 | { | |
1005 | ASSERT (otype == bfd_link_hash_common); | |
1006 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1007 | nbfd, name); | |
1008 | if (obfd != NULL) | |
1009 | einfo (_("%B: warning: common is here\n"), obfd); | |
1010 | } | |
1011 | else if (otype == bfd_link_hash_defined | |
1012 | || otype == bfd_link_hash_defweak | |
1013 | || otype == bfd_link_hash_indirect) | |
1014 | { | |
1015 | ASSERT (ntype == bfd_link_hash_common); | |
1016 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1017 | nbfd, name); | |
1018 | if (obfd != NULL) | |
1019 | einfo (_("%B: warning: defined here\n"), obfd); | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1024 | if (osize > nsize) | |
1025 | { | |
1026 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1027 | nbfd, name); | |
1028 | if (obfd != NULL) | |
1029 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1030 | } | |
1031 | else if (nsize > osize) | |
1032 | { | |
1033 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1034 | nbfd, name); | |
1035 | if (obfd != NULL) | |
1036 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1037 | } | |
1038 | else | |
1039 | { | |
1040 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1041 | if (obfd != NULL) | |
1042 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1043 | } | |
1044 | } | |
1045 | ||
b34976b6 | 1046 | return TRUE; |
252b5132 RH |
1047 | } |
1048 | ||
1049 | /* This is called when BFD has discovered a set element. H is the | |
1050 | entry in the linker hash table for the set. SECTION and VALUE | |
1051 | represent a value which should be added to the set. */ | |
1052 | ||
b34976b6 | 1053 | static bfd_boolean |
1579bae1 AM |
1054 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1055 | struct bfd_link_hash_entry *h, | |
1056 | bfd_reloc_code_real_type reloc, | |
1057 | bfd *abfd, | |
1058 | asection *section, | |
1059 | bfd_vma value) | |
252b5132 RH |
1060 | { |
1061 | if (config.warn_constructors) | |
1062 | einfo (_("%P: warning: global constructor %s used\n"), | |
1063 | h->root.string); | |
1064 | ||
1065 | if (! config.build_constructors) | |
b34976b6 | 1066 | return TRUE; |
252b5132 | 1067 | |
1579bae1 | 1068 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1069 | |
1070 | if (h->type == bfd_link_hash_new) | |
1071 | { | |
1072 | h->type = bfd_link_hash_undefined; | |
1073 | h->u.undef.abfd = abfd; | |
1074 | /* We don't call bfd_link_add_undef to add this to the list of | |
1075 | undefined symbols because we are going to define it | |
1076 | ourselves. */ | |
1077 | } | |
1078 | ||
b34976b6 | 1079 | return TRUE; |
252b5132 RH |
1080 | } |
1081 | ||
1082 | /* This is called when BFD has discovered a constructor. This is only | |
1083 | called for some object file formats--those which do not handle | |
1084 | constructors in some more clever fashion. This is similar to | |
1085 | adding an element to a set, but less general. */ | |
1086 | ||
b34976b6 | 1087 | static bfd_boolean |
1579bae1 AM |
1088 | constructor_callback (struct bfd_link_info *info, |
1089 | bfd_boolean constructor, | |
1090 | const char *name, | |
1091 | bfd *abfd, | |
1092 | asection *section, | |
1093 | bfd_vma value) | |
252b5132 RH |
1094 | { |
1095 | char *s; | |
1096 | struct bfd_link_hash_entry *h; | |
1097 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1098 | ||
1099 | if (config.warn_constructors) | |
1100 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1101 | ||
1102 | if (! config.build_constructors) | |
b34976b6 | 1103 | return TRUE; |
252b5132 RH |
1104 | |
1105 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1106 | useful error message. */ | |
f13a99db | 1107 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1108 | && (info->relocatable |
252b5132 RH |
1109 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1110 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1111 | ||
1112 | s = set_name; | |
1113 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1114 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1115 | if (constructor) | |
1116 | strcpy (s, "__CTOR_LIST__"); | |
1117 | else | |
1118 | strcpy (s, "__DTOR_LIST__"); | |
1119 | ||
b34976b6 | 1120 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1121 | if (h == (struct bfd_link_hash_entry *) NULL) |
1122 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1123 | if (h->type == bfd_link_hash_new) | |
1124 | { | |
1125 | h->type = bfd_link_hash_undefined; | |
1126 | h->u.undef.abfd = abfd; | |
1127 | /* We don't call bfd_link_add_undef to add this to the list of | |
1128 | undefined symbols because we are going to define it | |
1129 | ourselves. */ | |
1130 | } | |
1131 | ||
1132 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1133 | return TRUE; |
252b5132 RH |
1134 | } |
1135 | ||
1136 | /* A structure used by warning_callback to pass information through | |
1137 | bfd_map_over_sections. */ | |
1138 | ||
0125cdf2 NC |
1139 | struct warning_callback_info |
1140 | { | |
b34976b6 | 1141 | bfd_boolean found; |
252b5132 RH |
1142 | const char *warning; |
1143 | const char *symbol; | |
1144 | asymbol **asymbols; | |
1145 | }; | |
1146 | ||
1147 | /* This is called when there is a reference to a warning symbol. */ | |
1148 | ||
b34976b6 | 1149 | static bfd_boolean |
1579bae1 AM |
1150 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1151 | const char *warning, | |
1152 | const char *symbol, | |
1153 | bfd *abfd, | |
1154 | asection *section, | |
1155 | bfd_vma address) | |
252b5132 RH |
1156 | { |
1157 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1158 | have a cleaner interface, but what? */ | |
1159 | if (! config.warn_multiple_gp | |
1160 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1161 | return TRUE; |
252b5132 RH |
1162 | |
1163 | if (section != NULL) | |
300475fe | 1164 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1165 | else if (abfd == NULL) |
300475fe | 1166 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1167 | else if (symbol == NULL) |
300475fe | 1168 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1169 | else |
1170 | { | |
91d6fa6a | 1171 | struct warning_callback_info cinfo; |
252b5132 RH |
1172 | |
1173 | /* Look through the relocs to see if we can find a plausible | |
1174 | address. */ | |
5c1d2f5f AM |
1175 | |
1176 | if (!bfd_generic_link_read_symbols (abfd)) | |
1177 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1178 | |
91d6fa6a NC |
1179 | cinfo.found = FALSE; |
1180 | cinfo.warning = warning; | |
1181 | cinfo.symbol = symbol; | |
1182 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1183 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
252b5132 | 1184 | |
91d6fa6a | 1185 | if (! cinfo.found) |
300475fe | 1186 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1187 | } |
1188 | ||
b34976b6 | 1189 | return TRUE; |
252b5132 RH |
1190 | } |
1191 | ||
1192 | /* This is called by warning_callback for each section. It checks the | |
1193 | relocs of the section to see if it can find a reference to the | |
1194 | symbol which triggered the warning. If it can, it uses the reloc | |
1195 | to give an error message with a file and line number. */ | |
1196 | ||
1197 | static void | |
1579bae1 | 1198 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1199 | { |
1e9cc1c2 | 1200 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1201 | long relsize; |
1202 | arelent **relpp; | |
1203 | long relcount; | |
1204 | arelent **p, **pend; | |
1205 | ||
1206 | if (info->found) | |
1207 | return; | |
1208 | ||
1209 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1210 | if (relsize < 0) | |
1211 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1212 | if (relsize == 0) | |
1213 | return; | |
1214 | ||
1e9cc1c2 | 1215 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1216 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1217 | if (relcount < 0) | |
1218 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1219 | ||
1220 | p = relpp; | |
1221 | pend = p + relcount; | |
1222 | for (; p < pend && *p != NULL; p++) | |
1223 | { | |
1224 | arelent *q = *p; | |
1225 | ||
1226 | if (q->sym_ptr_ptr != NULL | |
1227 | && *q->sym_ptr_ptr != NULL | |
1228 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1229 | { | |
1230 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1231 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1232 | info->warning); | |
b34976b6 | 1233 | info->found = TRUE; |
252b5132 RH |
1234 | break; |
1235 | } | |
1236 | } | |
1237 | ||
1238 | free (relpp); | |
1239 | } | |
1240 | ||
1241 | /* This is called when an undefined symbol is found. */ | |
1242 | ||
b34976b6 | 1243 | static bfd_boolean |
1579bae1 AM |
1244 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1245 | const char *name, | |
1246 | bfd *abfd, | |
1247 | asection *section, | |
1248 | bfd_vma address, | |
0b28295d | 1249 | bfd_boolean error) |
252b5132 RH |
1250 | { |
1251 | static char *error_name; | |
1252 | static unsigned int error_count; | |
1253 | ||
1254 | #define MAX_ERRORS_IN_A_ROW 5 | |
1255 | ||
1256 | if (config.warn_once) | |
1257 | { | |
1258 | static struct bfd_hash_table *hash; | |
1259 | ||
1260 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1261 | if (hash == NULL) |
1262 | { | |
1e9cc1c2 NC |
1263 | hash = (struct bfd_hash_table *) |
1264 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
1265 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1266 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1267 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1268 | } | |
1269 | ||
b34976b6 AM |
1270 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1271 | return TRUE; | |
252b5132 | 1272 | |
b34976b6 | 1273 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1274 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1275 | } | |
1276 | ||
1277 | /* We never print more than a reasonable number of errors in a row | |
1278 | for a single symbol. */ | |
1579bae1 | 1279 | if (error_name != NULL |
252b5132 RH |
1280 | && strcmp (name, error_name) == 0) |
1281 | ++error_count; | |
1282 | else | |
1283 | { | |
1284 | error_count = 0; | |
1579bae1 | 1285 | if (error_name != NULL) |
252b5132 | 1286 | free (error_name); |
d1b2b2dc | 1287 | error_name = xstrdup (name); |
252b5132 RH |
1288 | } |
1289 | ||
1290 | if (section != NULL) | |
1291 | { | |
1292 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1293 | { |
0b28295d ILT |
1294 | if (error) |
1295 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1296 | abfd, section, address, name); | |
1297 | else | |
1298 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1299 | abfd, section, address, name); | |
b6f29aaa | 1300 | } |
252b5132 | 1301 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1302 | { |
1303 | if (error) | |
1304 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1305 | abfd, section, address, name); | |
1306 | else | |
1307 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1308 | abfd, section, address, name); | |
1309 | } | |
1310 | else if (error) | |
1311 | einfo ("%X"); | |
252b5132 RH |
1312 | } |
1313 | else | |
1314 | { | |
1315 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1316 | { |
0b28295d ILT |
1317 | if (error) |
1318 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1319 | abfd, name); | |
1320 | else | |
1321 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1322 | abfd, name); | |
b6f29aaa | 1323 | } |
252b5132 | 1324 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1325 | { |
1326 | if (error) | |
1327 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1328 | abfd, name); | |
1329 | else | |
1330 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1331 | abfd, name); | |
1332 | } | |
1333 | else if (error) | |
1334 | einfo ("%X"); | |
252b5132 RH |
1335 | } |
1336 | ||
b34976b6 | 1337 | return TRUE; |
252b5132 RH |
1338 | } |
1339 | ||
8aae64e6 AO |
1340 | /* Counter to limit the number of relocation overflow error messages |
1341 | to print. Errors are printed as it is decremented. When it's | |
1342 | called and the counter is zero, a final message is printed | |
1343 | indicating more relocations were omitted. When it gets to -1, no | |
1344 | such errors are printed. If it's initially set to a value less | |
1345 | than -1, all such errors will be printed (--verbose does this). */ | |
1346 | ||
1347 | int overflow_cutoff_limit = 10; | |
1348 | ||
252b5132 RH |
1349 | /* This is called when a reloc overflows. */ |
1350 | ||
b34976b6 | 1351 | static bfd_boolean |
1579bae1 | 1352 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1353 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1354 | const char *name, |
1355 | const char *reloc_name, | |
1356 | bfd_vma addend, | |
1357 | bfd *abfd, | |
1358 | asection *section, | |
1359 | bfd_vma address) | |
252b5132 | 1360 | { |
8aae64e6 AO |
1361 | if (overflow_cutoff_limit == -1) |
1362 | return TRUE; | |
1363 | ||
e1fffbe6 | 1364 | einfo ("%X%C:", abfd, section, address); |
8aae64e6 AO |
1365 | |
1366 | if (overflow_cutoff_limit >= 0 | |
1367 | && overflow_cutoff_limit-- == 0) | |
1368 | { | |
1369 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1370 | return TRUE; | |
1371 | } | |
1372 | ||
dfeffb9f L |
1373 | if (entry) |
1374 | { | |
1375 | while (entry->type == bfd_link_hash_indirect | |
1376 | || entry->type == bfd_link_hash_warning) | |
1377 | entry = entry->u.i.link; | |
1378 | switch (entry->type) | |
1379 | { | |
1380 | case bfd_link_hash_undefined: | |
1381 | case bfd_link_hash_undefweak: | |
1382 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1383 | reloc_name, entry->root.string); | |
1384 | break; | |
1385 | case bfd_link_hash_defined: | |
1386 | case bfd_link_hash_defweak: | |
1387 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1388 | reloc_name, entry->root.string, | |
a6e1b90f L |
1389 | entry->u.def.section, |
1390 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1391 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1392 | break; |
1393 | default: | |
1394 | abort (); | |
1395 | break; | |
1396 | } | |
1397 | } | |
1398 | else | |
1399 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1400 | reloc_name, name); | |
252b5132 RH |
1401 | if (addend != 0) |
1402 | einfo ("+%v", addend); | |
1403 | einfo ("\n"); | |
b34976b6 | 1404 | return TRUE; |
252b5132 RH |
1405 | } |
1406 | ||
1407 | /* This is called when a dangerous relocation is made. */ | |
1408 | ||
b34976b6 | 1409 | static bfd_boolean |
1579bae1 AM |
1410 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1411 | const char *message, | |
1412 | bfd *abfd, | |
1413 | asection *section, | |
1414 | bfd_vma address) | |
252b5132 | 1415 | { |
e1fffbe6 AM |
1416 | einfo (_("%X%C: dangerous relocation: %s\n"), |
1417 | abfd, section, address, message); | |
b34976b6 | 1418 | return TRUE; |
252b5132 RH |
1419 | } |
1420 | ||
1421 | /* This is called when a reloc is being generated attached to a symbol | |
1422 | that is not being output. */ | |
1423 | ||
b34976b6 | 1424 | static bfd_boolean |
1579bae1 AM |
1425 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1426 | const char *name, | |
1427 | bfd *abfd, | |
1428 | asection *section, | |
1429 | bfd_vma address) | |
252b5132 | 1430 | { |
e1fffbe6 AM |
1431 | einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), |
1432 | abfd, section, address, name); | |
b34976b6 | 1433 | return TRUE; |
252b5132 RH |
1434 | } |
1435 | ||
1436 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1437 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1438 | using the -y option, while notice_all is set if the --cref option |
1439 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1440 | linker script; and if plugins are active, since they need to monitor | |
1441 | all references from non-IR files. */ | |
252b5132 | 1442 | |
b34976b6 | 1443 | static bfd_boolean |
1579bae1 AM |
1444 | notice (struct bfd_link_info *info, |
1445 | const char *name, | |
1446 | bfd *abfd, | |
1447 | asection *section, | |
1448 | bfd_vma value) | |
252b5132 | 1449 | { |
5061a885 AM |
1450 | if (name == NULL) |
1451 | { | |
1452 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1453 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1454 | return TRUE; |
1455 | } | |
1456 | ||
5d3236ee DK |
1457 | #ifdef ENABLE_PLUGINS |
1458 | /* We should hide symbols in the dummy IR BFDs from the nocrossrefs list | |
1459 | and let the real object files that are generated and added later trip | |
1460 | the error instead. Similarly would be better to trace the real symbol | |
1461 | from the real file than the temporary dummy. */ | |
1462 | if (!plugin_notice (info, name, abfd, section, value)) | |
1463 | return TRUE; | |
1464 | #endif /* ENABLE_PLUGINS */ | |
1465 | ||
1466 | if (info->notice_hash != NULL | |
1467 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) | |
252b5132 RH |
1468 | { |
1469 | if (bfd_is_und_section (section)) | |
1470 | einfo ("%B: reference to %s\n", abfd, name); | |
1471 | else | |
1472 | einfo ("%B: definition of %s\n", abfd, name); | |
1473 | } | |
1474 | ||
1475 | if (command_line.cref || nocrossref_list != NULL) | |
1476 | add_cref (name, abfd, section, value); | |
1477 | ||
b34976b6 | 1478 | return TRUE; |
252b5132 | 1479 | } |