Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
e922bcab | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
f96b4a7b | 7 | This file is part of the GNU Binutils. |
252b5132 | 8 | |
f96b4a7b | 9 | This program is free software; you can redistribute it and/or modify |
2fa9fc65 | 10 | it under the terms of the GNU General Public License as published by |
f96b4a7b NC |
11 | the Free Software Foundation; either version 3 of the License, or |
12 | (at your option) any later version. | |
252b5132 | 13 | |
f96b4a7b | 14 | This program is distributed in the hope that it will be useful, |
2fa9fc65 NC |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
252b5132 | 18 | |
2fa9fc65 | 19 | You should have received a copy of the GNU General Public License |
f96b4a7b NC |
20 | along with this program; if not, write to the Free Software |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
252b5132 | 23 | |
252b5132 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
3882b010 | 26 | #include "safe-ctype.h" |
252b5132 RH |
27 | #include "libiberty.h" |
28 | #include "progress.h" | |
29 | #include "bfdlink.h" | |
5af11cab | 30 | #include "filenames.h" |
252b5132 RH |
31 | |
32 | #include "ld.h" | |
33 | #include "ldmain.h" | |
34 | #include "ldmisc.h" | |
35 | #include "ldwrite.h" | |
252b5132 RH |
36 | #include "ldexp.h" |
37 | #include "ldlang.h" | |
df2a7313 | 38 | #include <ldgram.h> |
252b5132 RH |
39 | #include "ldlex.h" |
40 | #include "ldfile.h" | |
b71e2778 | 41 | #include "ldemul.h" |
252b5132 | 42 | #include "ldctor.h" |
5d3236ee DK |
43 | #ifdef ENABLE_PLUGINS |
44 | #include "plugin.h" | |
45 | #include "plugin-api.h" | |
46 | #include "libbfd.h" | |
47 | #endif /* ENABLE_PLUGINS */ | |
252b5132 | 48 | |
0125cdf2 | 49 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
50 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
51 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
52 | #endif | |
53 | ||
54 | #include <string.h> | |
55 | ||
56 | #ifdef HAVE_SBRK | |
502bdb00 | 57 | #if !HAVE_DECL_SBRK |
1579bae1 | 58 | extern void *sbrk (); |
252b5132 RH |
59 | #endif |
60 | #endif | |
61 | ||
9c8ebd6a DJ |
62 | #ifndef TARGET_SYSTEM_ROOT |
63 | #define TARGET_SYSTEM_ROOT "" | |
64 | #endif | |
65 | ||
252b5132 RH |
66 | /* EXPORTS */ |
67 | ||
53d25da6 AM |
68 | FILE *saved_script_handle = NULL; |
69 | FILE *previous_script_handle = NULL; | |
70 | bfd_boolean force_make_executable = FALSE; | |
71 | ||
252b5132 RH |
72 | char *default_target; |
73 | const char *output_filename = "a.out"; | |
74 | ||
75 | /* Name this program was invoked by. */ | |
76 | char *program_name; | |
77 | ||
9c8ebd6a | 78 | /* The prefix for system library directories. */ |
e2243057 | 79 | const char *ld_sysroot; |
9c8ebd6a | 80 | |
3fe38064 NC |
81 | /* The canonical representation of ld_sysroot. */ |
82 | char * ld_canon_sysroot; | |
83 | int ld_canon_sysroot_len; | |
84 | ||
252b5132 RH |
85 | /* Set by -G argument, for MIPS ECOFF target. */ |
86 | int g_switch_value = 8; | |
87 | ||
88 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 89 | bfd_boolean trace_files; |
252b5132 RH |
90 | |
91 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 92 | bfd_boolean trace_file_tries; |
252b5132 RH |
93 | |
94 | /* Nonzero means version number was printed, so exit successfully | |
95 | instead of complaining if no input files are given. */ | |
b34976b6 | 96 | bfd_boolean version_printed; |
252b5132 RH |
97 | |
98 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 99 | bfd_boolean whole_archive; |
252b5132 | 100 | |
ddbb8a31 NC |
101 | /* True means only create DT_NEEDED entries for dynamic libraries |
102 | if they actually satisfy some reference in a regular object. */ | |
103 | bfd_boolean add_DT_NEEDED_for_regular; | |
104 | ||
105 | /* True means create DT_NEEDED entries for dynamic libraries that | |
106 | are DT_NEEDED by dynamic libraries specifically mentioned on | |
107 | the command line. */ | |
df856bcc | 108 | bfd_boolean add_DT_NEEDED_for_dynamic = TRUE; |
e56f61be | 109 | |
b34976b6 AM |
110 | /* TRUE if we should demangle symbol names. */ |
111 | bfd_boolean demangling; | |
252b5132 RH |
112 | |
113 | args_type command_line; | |
114 | ||
115 | ld_config_type config; | |
116 | ||
bcaa7b3e L |
117 | sort_type sort_section; |
118 | ||
e2243057 RS |
119 | static const char *get_sysroot |
120 | (int, char **); | |
0125cdf2 | 121 | static char *get_emulation |
1579bae1 | 122 | (int, char **); |
0125cdf2 | 123 | static bfd_boolean add_archive_element |
5d3236ee | 124 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
0125cdf2 | 125 | static bfd_boolean multiple_definition |
24f58f47 | 126 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 127 | bfd *, asection *, bfd_vma); |
0125cdf2 | 128 | static bfd_boolean multiple_common |
24f58f47 AM |
129 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
130 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 131 | static bfd_boolean add_to_set |
1579bae1 AM |
132 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
133 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 134 | static bfd_boolean constructor_callback |
1579bae1 AM |
135 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
136 | asection *, bfd_vma); | |
0125cdf2 | 137 | static bfd_boolean warning_callback |
1579bae1 AM |
138 | (struct bfd_link_info *, const char *, const char *, bfd *, |
139 | asection *, bfd_vma); | |
0125cdf2 | 140 | static void warning_find_reloc |
1579bae1 | 141 | (bfd *, asection *, void *); |
0125cdf2 | 142 | static bfd_boolean undefined_symbol |
1579bae1 AM |
143 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
144 | bfd_boolean); | |
0125cdf2 | 145 | static bfd_boolean reloc_overflow |
dfeffb9f L |
146 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
147 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 148 | static bfd_boolean reloc_dangerous |
1579bae1 | 149 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 150 | static bfd_boolean unattached_reloc |
1579bae1 | 151 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 152 | static bfd_boolean notice |
35ed3f94 | 153 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
16d96b5b | 154 | bfd *, asection *, bfd_vma, flagword, const char *); |
0125cdf2 NC |
155 | |
156 | static struct bfd_link_callbacks link_callbacks = | |
157 | { | |
252b5132 RH |
158 | add_archive_element, |
159 | multiple_definition, | |
160 | multiple_common, | |
161 | add_to_set, | |
162 | constructor_callback, | |
163 | warning_callback, | |
164 | undefined_symbol, | |
165 | reloc_overflow, | |
166 | reloc_dangerous, | |
167 | unattached_reloc, | |
e1fffbe6 | 168 | notice, |
2889e75b | 169 | einfo, |
49fa1e15 AM |
170 | info_msg, |
171 | minfo, | |
2889e75b | 172 | ldlang_override_segment_assignment |
252b5132 RH |
173 | }; |
174 | ||
175 | struct bfd_link_info link_info; | |
176 | \f | |
177 | static void | |
498cd2a0 | 178 | ld_cleanup (void) |
252b5132 | 179 | { |
498cd2a0 AM |
180 | bfd_cache_close_all (); |
181 | #ifdef ENABLE_PLUGINS | |
182 | plugin_call_cleanup (); | |
183 | #endif | |
184 | if (output_filename && delete_output_file_on_failure) | |
185 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
186 | } |
187 | ||
188 | int | |
1579bae1 | 189 | main (int argc, char **argv) |
252b5132 RH |
190 | { |
191 | char *emulation; | |
192 | long start_time = get_run_time (); | |
193 | ||
194 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
195 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
196 | #endif |
197 | #if defined (HAVE_SETLOCALE) | |
198 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
199 | #endif |
200 | bindtextdomain (PACKAGE, LOCALEDIR); | |
201 | textdomain (PACKAGE); | |
202 | ||
203 | program_name = argv[0]; | |
204 | xmalloc_set_program_name (program_name); | |
205 | ||
206 | START_PROGRESS (program_name, 0); | |
207 | ||
869b9d07 MM |
208 | expandargv (&argc, &argv); |
209 | ||
252b5132 RH |
210 | bfd_init (); |
211 | ||
212 | bfd_set_error_program_name (program_name); | |
213 | ||
498cd2a0 | 214 | xatexit (ld_cleanup); |
252b5132 | 215 | |
e2243057 RS |
216 | /* Set up the sysroot directory. */ |
217 | ld_sysroot = get_sysroot (argc, argv); | |
218 | if (*ld_sysroot) | |
9c8ebd6a | 219 | { |
e2243057 | 220 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 221 | { |
70487fb2 | 222 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 223 | ld_sysroot = ""; |
0125cdf2 | 224 | } |
e2243057 RS |
225 | else |
226 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 227 | } |
3fe38064 NC |
228 | if (ld_canon_sysroot) |
229 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
230 | else | |
231 | ld_canon_sysroot_len = -1; | |
232 | ||
252b5132 RH |
233 | /* Set the default BFD target based on the configured target. Doing |
234 | this permits the linker to be configured for a particular target, | |
235 | and linked against a shared BFD library which was configured for | |
236 | a different target. The macro TARGET is defined by Makefile. */ | |
237 | if (! bfd_set_default_target (TARGET)) | |
238 | { | |
239 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
240 | xexit (1); | |
241 | } | |
242 | ||
b47c4208 AM |
243 | #if YYDEBUG |
244 | { | |
245 | extern int yydebug; | |
246 | yydebug = 1; | |
247 | } | |
248 | #endif | |
249 | ||
b34976b6 | 250 | config.build_constructors = TRUE; |
c76308d2 | 251 | config.rpath_separator = ':'; |
a854a4a7 AM |
252 | config.split_by_reloc = (unsigned) -1; |
253 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
254 | config.make_executable = TRUE; |
255 | config.magic_demand_paged = TRUE; | |
256 | config.text_read_only = TRUE; | |
257 | ||
b34976b6 | 258 | command_line.warn_mismatch = TRUE; |
fe7929ce | 259 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 260 | command_line.check_section_addresses = -1; |
28d5f677 | 261 | command_line.disable_target_specific_optimizations = -1; |
bcaa7b3e | 262 | |
252b5132 RH |
263 | /* We initialize DEMANGLING based on the environment variable |
264 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
265 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
266 | environment. Acting the same way here lets us provide the same | |
267 | interface by default. */ | |
268 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
269 | ||
b34976b6 | 270 | link_info.allow_undefined_version = TRUE; |
b5067602 | 271 | link_info.keep_memory = TRUE; |
b5067602 | 272 | link_info.combreloc = TRUE; |
d5cd3933 | 273 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 274 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
275 | link_info.callbacks = &link_callbacks; |
276 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
277 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
278 | and _fini symbols. We are compatible. */ | |
279 | link_info.init_function = "_init"; | |
280 | link_info.fini_function = "_fini"; | |
a9a4c53e | 281 | link_info.relax_pass = 1; |
e0076ab3 | 282 | link_info.pei386_auto_import = -1; |
db6751f2 | 283 | link_info.spare_dynamic_tags = 5; |
967928e9 | 284 | link_info.path_separator = ':'; |
24718e3b | 285 | |
252b5132 | 286 | ldfile_add_arch (""); |
252b5132 RH |
287 | emulation = get_emulation (argc, argv); |
288 | ldemul_choose_mode (emulation); | |
742aeb63 | 289 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
290 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
291 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 RH |
292 | lang_init (); |
293 | ldemul_before_parse (); | |
b34976b6 | 294 | lang_has_input_file = FALSE; |
252b5132 RH |
295 | parse_args (argc, argv); |
296 | ||
2d643429 NC |
297 | if (config.hash_table_size != 0) |
298 | bfd_hash_set_default_size (config.hash_table_size); | |
299 | ||
252b5132 RH |
300 | ldemul_set_symbols (); |
301 | ||
1049f94e | 302 | if (link_info.relocatable) |
252b5132 | 303 | { |
02b0b1aa NS |
304 | if (command_line.check_section_addresses < 0) |
305 | command_line.check_section_addresses = 0; | |
252b5132 RH |
306 | if (link_info.shared) |
307 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
308 | } | |
309 | ||
d8cf8b51 L |
310 | /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, |
311 | --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and | |
312 | --dynamic-list FILE. -Bsymbolic and -Bsymbolic-functions are | |
313 | for shared libraries. -Bsymbolic overrides all others and vice | |
314 | versa. */ | |
315 | switch (command_line.symbolic) | |
316 | { | |
317 | case symbolic_unset: | |
318 | break; | |
319 | case symbolic: | |
320 | /* -Bsymbolic is for shared library only. */ | |
321 | if (link_info.shared) | |
322 | { | |
323 | link_info.symbolic = TRUE; | |
324 | /* Should we free the unused memory? */ | |
325 | link_info.dynamic_list = NULL; | |
326 | command_line.dynamic_list = dynamic_list_unset; | |
327 | } | |
328 | break; | |
329 | case symbolic_functions: | |
330 | /* -Bsymbolic-functions is for shared library only. */ | |
331 | if (link_info.shared) | |
332 | command_line.dynamic_list = dynamic_list_data; | |
333 | break; | |
334 | } | |
335 | ||
336 | switch (command_line.dynamic_list) | |
337 | { | |
338 | case dynamic_list_unset: | |
339 | break; | |
340 | case dynamic_list_data: | |
341 | link_info.dynamic_data = TRUE; | |
342 | case dynamic_list: | |
343 | link_info.dynamic = TRUE; | |
344 | break; | |
345 | } | |
346 | ||
7333607e JJ |
347 | if (! link_info.shared) |
348 | { | |
349 | if (command_line.filter_shlib) | |
e97cb84f | 350 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 351 | if (command_line.auxiliary_filters) |
e97cb84f | 352 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
353 | } |
354 | ||
36af4a4e JJ |
355 | if (! link_info.shared || link_info.pie) |
356 | link_info.executable = TRUE; | |
357 | ||
252b5132 RH |
358 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
359 | don't see how else this can be handled, since in this case we | |
360 | must preserve all externally visible symbols. */ | |
1049f94e | 361 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
362 | { |
363 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 364 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
365 | link_info.discard = discard_all; |
366 | } | |
367 | ||
14be8564 L |
368 | /* If we have not already opened and parsed a linker script, |
369 | try the default script from command line first. */ | |
370 | if (saved_script_handle == NULL | |
371 | && command_line.default_script != NULL) | |
372 | { | |
373 | ldfile_open_command_file (command_line.default_script); | |
374 | parser_input = input_script; | |
375 | yyparse (); | |
376 | } | |
377 | ||
b9a8de1e NC |
378 | /* If we have not already opened and parsed a linker script |
379 | read the emulation's appropriate default script. */ | |
b90e1c6f | 380 | if (saved_script_handle == NULL) |
252b5132 | 381 | { |
252b5132 | 382 | int isfile; |
b7a26f91 | 383 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
384 | |
385 | if (isfile) | |
7d24f02c | 386 | ldfile_open_default_command_file (s); |
252b5132 | 387 | else |
b7a26f91 | 388 | { |
252b5132 RH |
389 | lex_string = s; |
390 | lex_redirect (s); | |
391 | } | |
392 | parser_input = input_script; | |
393 | yyparse (); | |
394 | lex_string = NULL; | |
395 | } | |
396 | ||
b9a8de1e NC |
397 | if (trace_file_tries) |
398 | { | |
9cb61eab AM |
399 | if (saved_script_handle) |
400 | info_msg (_("using external linker script:")); | |
401 | else | |
402 | info_msg (_("using internal linker script:")); | |
403 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
404 | |
405 | if (saved_script_handle) | |
406 | { | |
74699268 | 407 | static const int ld_bufsz = 8193; |
b9a8de1e | 408 | size_t n; |
1e9cc1c2 | 409 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
410 | |
411 | rewind (saved_script_handle); | |
74699268 | 412 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 413 | { |
b7a26f91 | 414 | buf[n] = 0; |
b9a8de1e NC |
415 | info_msg (buf); |
416 | } | |
417 | rewind (saved_script_handle); | |
418 | free (buf); | |
419 | } | |
420 | else | |
421 | { | |
422 | int isfile; | |
423 | ||
b7a26f91 | 424 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 425 | } |
b7a26f91 | 426 | |
b9a8de1e NC |
427 | info_msg ("\n==================================================\n"); |
428 | } | |
429 | ||
30824704 RM |
430 | if (command_line.print_output_format) |
431 | info_msg ("%s\n", lang_get_output_target ()); | |
432 | ||
252b5132 RH |
433 | lang_final (); |
434 | ||
b34976b6 | 435 | if (!lang_has_input_file) |
252b5132 | 436 | { |
30824704 | 437 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
438 | xexit (0); |
439 | einfo (_("%P%F: no input files\n")); | |
440 | } | |
441 | ||
442 | if (trace_files) | |
0125cdf2 | 443 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
444 | |
445 | ldemul_after_parse (); | |
446 | ||
252b5132 RH |
447 | if (config.map_filename) |
448 | { | |
449 | if (strcmp (config.map_filename, "-") == 0) | |
450 | { | |
451 | config.map_file = stdout; | |
452 | } | |
453 | else | |
454 | { | |
455 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
456 | if (config.map_file == (FILE *) NULL) | |
457 | { | |
458 | bfd_set_error (bfd_error_system_call); | |
459 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
460 | config.map_filename); | |
461 | } | |
462 | } | |
463 | } | |
464 | ||
252b5132 RH |
465 | lang_process (); |
466 | ||
467 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 468 | symbols, and possibly multiple definitions. */ |
1049f94e | 469 | if (link_info.relocatable) |
f13a99db | 470 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 471 | else |
f13a99db | 472 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
473 | |
474 | ldwrite (); | |
475 | ||
476 | if (config.map_file != NULL) | |
477 | lang_map (); | |
478 | if (command_line.cref) | |
479 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
480 | if (nocrossref_list != NULL) | |
481 | check_nocrossrefs (); | |
482 | ||
750877ba L |
483 | lang_finish (); |
484 | ||
1049f94e | 485 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 486 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 487 | want to ignore for relocatable output?) */ |
b34976b6 | 488 | if (!config.make_executable && !force_make_executable) |
252b5132 | 489 | { |
b34976b6 | 490 | if (trace_files) |
0125cdf2 NC |
491 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
492 | output_filename); | |
252b5132 | 493 | |
4309cbf2 | 494 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
495 | xexit (1); |
496 | } | |
497 | else | |
498 | { | |
f13a99db AM |
499 | if (! bfd_close (link_info.output_bfd)) |
500 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
501 | |
502 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
503 | executable file and it doesn't end in .exe, copy it to one |
504 | which does. */ | |
1049f94e | 505 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
506 | { |
507 | int len = strlen (output_filename); | |
0125cdf2 | 508 | |
6d5e62f8 | 509 | if (len < 4 |
252b5132 RH |
510 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
511 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
512 | { | |
513 | FILE *src; | |
514 | FILE *dst; | |
515 | const int bsize = 4096; | |
1e9cc1c2 | 516 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 517 | int l; |
1e9cc1c2 | 518 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 519 | |
252b5132 RH |
520 | strcpy (dst_name, output_filename); |
521 | strcat (dst_name, ".exe"); | |
522 | src = fopen (output_filename, FOPEN_RB); | |
523 | dst = fopen (dst_name, FOPEN_WB); | |
524 | ||
525 | if (!src) | |
1579bae1 AM |
526 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
527 | output_filename); | |
252b5132 | 528 | if (!dst) |
1579bae1 AM |
529 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
530 | dst_name); | |
252b5132 RH |
531 | while ((l = fread (buf, 1, bsize, src)) > 0) |
532 | { | |
533 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 534 | |
252b5132 | 535 | if (done != l) |
0125cdf2 | 536 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 537 | } |
0125cdf2 | 538 | |
252b5132 RH |
539 | fclose (src); |
540 | if (fclose (dst) == EOF) | |
0125cdf2 | 541 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
542 | free (dst_name); |
543 | free (buf); | |
544 | } | |
545 | } | |
546 | } | |
547 | ||
548 | END_PROGRESS (program_name); | |
549 | ||
550 | if (config.stats) | |
551 | { | |
552 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 553 | char *lim = (char *) sbrk (0); |
252b5132 RH |
554 | #endif |
555 | long run_time = get_run_time () - start_time; | |
556 | ||
e922bcab | 557 | fflush (stdout); |
252b5132 RH |
558 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
559 | program_name, run_time / 1000000, run_time % 1000000); | |
560 | #ifdef HAVE_SBRK | |
561 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
562 | (long) (lim - (char *) &environ)); | |
563 | #endif | |
e922bcab | 564 | fflush (stderr); |
252b5132 RH |
565 | } |
566 | ||
4309cbf2 | 567 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
568 | output_filename = NULL; |
569 | ||
570 | xexit (0); | |
571 | return 0; | |
572 | } | |
573 | ||
e2243057 RS |
574 | /* If the configured sysroot is relocatable, try relocating it based on |
575 | default prefix FROM. Return the relocated directory if it exists, | |
576 | otherwise return null. */ | |
577 | ||
578 | static char * | |
579 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
580 | { | |
581 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
582 | char *path; | |
583 | struct stat s; | |
584 | ||
585 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
586 | if (path) | |
587 | { | |
588 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
589 | return path; | |
590 | free (path); | |
591 | } | |
592 | #endif | |
593 | return 0; | |
594 | } | |
595 | ||
596 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
597 | ||
598 | static const char * | |
599 | get_sysroot (int argc, char **argv) | |
600 | { | |
601 | int i; | |
602 | const char *path; | |
603 | ||
604 | for (i = 1; i < argc; i++) | |
0112cd26 | 605 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
606 | return argv[i] + strlen ("--sysroot="); |
607 | ||
608 | path = get_relative_sysroot (BINDIR); | |
609 | if (path) | |
610 | return path; | |
611 | ||
612 | path = get_relative_sysroot (TOOLBINDIR); | |
613 | if (path) | |
614 | return path; | |
615 | ||
616 | return TARGET_SYSTEM_ROOT; | |
617 | } | |
618 | ||
252b5132 RH |
619 | /* We need to find any explicitly given emulation in order to initialize the |
620 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
621 | ||
622 | static char * | |
1579bae1 | 623 | get_emulation (int argc, char **argv) |
252b5132 RH |
624 | { |
625 | char *emulation; | |
626 | int i; | |
627 | ||
628 | emulation = getenv (EMULATION_ENVIRON); | |
629 | if (emulation == NULL) | |
630 | emulation = DEFAULT_EMULATION; | |
631 | ||
632 | for (i = 1; i < argc; i++) | |
633 | { | |
0112cd26 | 634 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
635 | { |
636 | if (argv[i][2] == '\0') | |
637 | { | |
638 | /* -m EMUL */ | |
639 | if (i < argc - 1) | |
640 | { | |
641 | emulation = argv[i + 1]; | |
642 | i++; | |
643 | } | |
644 | else | |
0125cdf2 | 645 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
646 | } |
647 | else if (strcmp (argv[i], "-mips1") == 0 | |
648 | || strcmp (argv[i], "-mips2") == 0 | |
649 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 650 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
651 | || strcmp (argv[i], "-mips5") == 0 |
652 | || strcmp (argv[i], "-mips32") == 0 | |
653 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
654 | || strcmp (argv[i], "-mips64") == 0 |
655 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 656 | { |
31d677f9 | 657 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
658 | passed to the linker by some MIPS compilers. They |
659 | generally tell the linker to use a slightly different | |
660 | library path. Perhaps someday these should be | |
661 | implemented as emulations; until then, we just ignore | |
662 | the arguments and hope that nobody ever creates | |
663 | emulations named ips1, ips2 or ips3. */ | |
664 | } | |
665 | else if (strcmp (argv[i], "-m486") == 0) | |
666 | { | |
667 | /* FIXME: The argument -m486 is passed to the linker on | |
668 | some Linux systems. Hope that nobody creates an | |
669 | emulation named 486. */ | |
670 | } | |
671 | else | |
672 | { | |
673 | /* -mEMUL */ | |
674 | emulation = &argv[i][2]; | |
675 | } | |
676 | } | |
677 | } | |
678 | ||
679 | return emulation; | |
680 | } | |
681 | ||
252b5132 | 682 | void |
1579bae1 | 683 | add_ysym (const char *name) |
252b5132 | 684 | { |
1579bae1 | 685 | if (link_info.notice_hash == NULL) |
252b5132 | 686 | { |
1e9cc1c2 NC |
687 | link_info.notice_hash = |
688 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
689 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
690 | bfd_hash_newfunc, | |
691 | sizeof (struct bfd_hash_entry), | |
692 | 61)) | |
252b5132 | 693 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 694 | } |
252b5132 | 695 | |
1579bae1 | 696 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
697 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
698 | } | |
699 | ||
700 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
701 | ||
702 | void | |
1579bae1 | 703 | add_wrap (const char *name) |
252b5132 RH |
704 | { |
705 | if (link_info.wrap_hash == NULL) | |
706 | { | |
1e9cc1c2 NC |
707 | link_info.wrap_hash = |
708 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
709 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
710 | bfd_hash_newfunc, | |
711 | sizeof (struct bfd_hash_entry), | |
712 | 61)) | |
252b5132 RH |
713 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
714 | } | |
0125cdf2 | 715 | |
b34976b6 | 716 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
717 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
718 | } | |
719 | ||
720 | /* Handle the -retain-symbols-file option. */ | |
721 | ||
722 | void | |
1579bae1 | 723 | add_keepsyms_file (const char *filename) |
252b5132 RH |
724 | { |
725 | FILE *file; | |
726 | char *buf; | |
727 | size_t bufsize; | |
728 | int c; | |
729 | ||
730 | if (link_info.strip == strip_some) | |
731 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
732 | ||
733 | file = fopen (filename, "r"); | |
1579bae1 | 734 | if (file == NULL) |
252b5132 RH |
735 | { |
736 | bfd_set_error (bfd_error_system_call); | |
737 | einfo ("%X%P: %s: %E\n", filename); | |
738 | return; | |
739 | } | |
740 | ||
1e9cc1c2 NC |
741 | link_info.keep_hash = (struct bfd_hash_table *) |
742 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
743 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
744 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
745 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
746 | ||
747 | bufsize = 100; | |
1e9cc1c2 | 748 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
749 | |
750 | c = getc (file); | |
751 | while (c != EOF) | |
752 | { | |
3882b010 | 753 | while (ISSPACE (c)) |
252b5132 RH |
754 | c = getc (file); |
755 | ||
756 | if (c != EOF) | |
757 | { | |
758 | size_t len = 0; | |
759 | ||
3882b010 | 760 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
761 | { |
762 | buf[len] = c; | |
763 | ++len; | |
764 | if (len >= bufsize) | |
765 | { | |
766 | bufsize *= 2; | |
1e9cc1c2 | 767 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
768 | } |
769 | c = getc (file); | |
770 | } | |
771 | ||
772 | buf[len] = '\0'; | |
773 | ||
1579bae1 | 774 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
775 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
776 | } | |
777 | } | |
778 | ||
779 | if (link_info.strip != strip_none) | |
780 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
781 | ||
5ed6aba4 | 782 | free (buf); |
252b5132 RH |
783 | link_info.strip = strip_some; |
784 | } | |
785 | \f | |
786 | /* Callbacks from the BFD linker routines. */ | |
787 | ||
788 | /* This is called when BFD has decided to include an archive member in | |
789 | a link. */ | |
790 | ||
b34976b6 | 791 | static bfd_boolean |
e1fffbe6 | 792 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 793 | bfd *abfd, |
5d3236ee DK |
794 | const char *name, |
795 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
796 | { |
797 | lang_input_statement_type *input; | |
5d3236ee | 798 | lang_input_statement_type orig_input; |
252b5132 | 799 | |
1e9cc1c2 NC |
800 | input = (lang_input_statement_type *) |
801 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
802 | input->filename = abfd->filename; |
803 | input->local_sym_name = abfd->filename; | |
804 | input->the_bfd = abfd; | |
252b5132 | 805 | |
5d3236ee DK |
806 | /* Save the original data for trace files/tries below, as plugins |
807 | (if enabled) may possibly alter it to point to a replacement | |
808 | BFD, but we still want to output the original BFD filename. */ | |
809 | orig_input = *input; | |
810 | #ifdef ENABLE_PLUGINS | |
9e2278f5 AM |
811 | if (bfd_my_archive (abfd) != NULL |
812 | && plugin_active_plugins_p () | |
813 | && !no_more_claiming) | |
5d3236ee DK |
814 | { |
815 | /* We must offer this archive member to the plugins to claim. */ | |
816 | int fd = open (bfd_my_archive (abfd)->filename, O_RDONLY | O_BINARY); | |
817 | if (fd >= 0) | |
818 | { | |
819 | struct ld_plugin_input_file file; | |
02d00247 | 820 | |
5d3236ee DK |
821 | /* Offset and filesize must refer to the individual archive |
822 | member, not the whole file, and must exclude the header. | |
823 | Fortunately for us, that is how the data is stored in the | |
824 | origin field of the bfd and in the arelt_data. */ | |
825 | file.name = bfd_my_archive (abfd)->filename; | |
826 | file.offset = abfd->origin; | |
827 | file.filesize = arelt_size (abfd); | |
828 | file.fd = fd; | |
02d00247 AM |
829 | plugin_maybe_claim (&file, input); |
830 | if (input->claimed) | |
5d3236ee | 831 | { |
8543fde5 | 832 | input->claim_archive = TRUE; |
5d3236ee DK |
833 | *subsbfd = input->the_bfd; |
834 | } | |
5d3236ee DK |
835 | } |
836 | } | |
837 | #endif /* ENABLE_PLUGINS */ | |
838 | ||
252b5132 RH |
839 | ldlang_add_file (input); |
840 | ||
1579bae1 | 841 | if (config.map_file != NULL) |
252b5132 | 842 | { |
b34976b6 | 843 | static bfd_boolean header_printed; |
252b5132 RH |
844 | struct bfd_link_hash_entry *h; |
845 | bfd *from; | |
846 | int len; | |
847 | ||
e1fffbe6 | 848 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
849 | |
850 | if (h == NULL) | |
851 | from = NULL; | |
852 | else | |
853 | { | |
854 | switch (h->type) | |
855 | { | |
856 | default: | |
857 | from = NULL; | |
858 | break; | |
859 | ||
860 | case bfd_link_hash_defined: | |
861 | case bfd_link_hash_defweak: | |
862 | from = h->u.def.section->owner; | |
863 | break; | |
864 | ||
865 | case bfd_link_hash_undefined: | |
866 | case bfd_link_hash_undefweak: | |
867 | from = h->u.undef.abfd; | |
868 | break; | |
869 | ||
870 | case bfd_link_hash_common: | |
871 | from = h->u.c.p->section->owner; | |
872 | break; | |
873 | } | |
874 | } | |
875 | ||
876 | if (! header_printed) | |
877 | { | |
878 | char buf[100]; | |
879 | ||
e3c8793a | 880 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 881 | minfo ("%s", buf); |
b34976b6 | 882 | header_printed = TRUE; |
252b5132 RH |
883 | } |
884 | ||
885 | if (bfd_my_archive (abfd) == NULL) | |
886 | { | |
887 | minfo ("%s", bfd_get_filename (abfd)); | |
888 | len = strlen (bfd_get_filename (abfd)); | |
889 | } | |
890 | else | |
891 | { | |
892 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
893 | bfd_get_filename (abfd)); | |
894 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
895 | + strlen (bfd_get_filename (abfd)) | |
896 | + 2); | |
897 | } | |
898 | ||
899 | if (len >= 29) | |
900 | { | |
901 | print_nl (); | |
902 | len = 0; | |
903 | } | |
904 | while (len < 30) | |
905 | { | |
906 | print_space (); | |
907 | ++len; | |
908 | } | |
909 | ||
910 | if (from != NULL) | |
911 | minfo ("%B ", from); | |
912 | if (h != NULL) | |
913 | minfo ("(%T)\n", h->root.string); | |
914 | else | |
915 | minfo ("(%s)\n", name); | |
916 | } | |
917 | ||
918 | if (trace_files || trace_file_tries) | |
5d3236ee | 919 | info_msg ("%I\n", &orig_input); |
b34976b6 | 920 | return TRUE; |
252b5132 RH |
921 | } |
922 | ||
923 | /* This is called when BFD has discovered a symbol which is defined | |
924 | multiple times. */ | |
925 | ||
b34976b6 | 926 | static bfd_boolean |
24f58f47 AM |
927 | multiple_definition (struct bfd_link_info *info, |
928 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
929 | bfd *nbfd, |
930 | asection *nsec, | |
931 | bfd_vma nval) | |
252b5132 | 932 | { |
24f58f47 AM |
933 | const char *name; |
934 | bfd *obfd; | |
935 | asection *osec; | |
936 | bfd_vma oval; | |
937 | ||
938 | if (info->allow_multiple_definition) | |
939 | return TRUE; | |
940 | ||
941 | switch (h->type) | |
942 | { | |
943 | case bfd_link_hash_defined: | |
944 | osec = h->u.def.section; | |
945 | oval = h->u.def.value; | |
946 | obfd = h->u.def.section->owner; | |
947 | break; | |
948 | case bfd_link_hash_indirect: | |
949 | osec = bfd_ind_section_ptr; | |
950 | oval = 0; | |
951 | obfd = NULL; | |
952 | break; | |
953 | default: | |
954 | abort (); | |
955 | } | |
956 | ||
957 | /* Ignore a redefinition of an absolute symbol to the | |
958 | same value; it's harmless. */ | |
959 | if (h->type == bfd_link_hash_defined | |
960 | && bfd_is_abs_section (osec) | |
961 | && bfd_is_abs_section (nsec) | |
962 | && nval == oval) | |
963 | return TRUE; | |
964 | ||
252b5132 RH |
965 | /* If either section has the output_section field set to |
966 | bfd_abs_section_ptr, it means that the section is being | |
967 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
968 | FIXME: It would be cleaner to somehow ignore symbols defined in |
969 | sections which are being discarded. */ | |
252b5132 RH |
970 | if ((osec->output_section != NULL |
971 | && ! bfd_is_abs_section (osec) | |
972 | && bfd_is_abs_section (osec->output_section)) | |
973 | || (nsec->output_section != NULL | |
974 | && ! bfd_is_abs_section (nsec) | |
975 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 976 | return TRUE; |
252b5132 | 977 | |
24f58f47 AM |
978 | name = h->root.string; |
979 | if (nbfd == NULL) | |
980 | { | |
981 | nbfd = obfd; | |
982 | nsec = osec; | |
983 | nval = oval; | |
984 | obfd = NULL; | |
985 | } | |
252b5132 RH |
986 | einfo (_("%X%C: multiple definition of `%T'\n"), |
987 | nbfd, nsec, nval, name); | |
1579bae1 | 988 | if (obfd != NULL) |
252b5132 | 989 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 990 | |
28d5f677 | 991 | if (RELAXATION_ENABLED) |
9b14b192 NC |
992 | { |
993 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
28d5f677 | 994 | command_line.disable_target_specific_optimizations = -1; |
9b14b192 | 995 | } |
6d5e62f8 | 996 | |
b34976b6 | 997 | return TRUE; |
252b5132 RH |
998 | } |
999 | ||
1000 | /* This is called when there is a definition of a common symbol, or | |
1001 | when a common symbol is found for a symbol that is already defined, | |
1002 | or when two common symbols are found. We only do something if | |
1003 | -warn-common was used. */ | |
1004 | ||
b34976b6 | 1005 | static bfd_boolean |
1579bae1 | 1006 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 1007 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1008 | bfd *nbfd, |
1009 | enum bfd_link_hash_type ntype, | |
1010 | bfd_vma nsize) | |
252b5132 | 1011 | { |
24f58f47 AM |
1012 | const char *name; |
1013 | bfd *obfd; | |
1014 | enum bfd_link_hash_type otype; | |
1015 | bfd_vma osize; | |
1016 | ||
1017 | if (!config.warn_common) | |
b34976b6 | 1018 | return TRUE; |
252b5132 | 1019 | |
24f58f47 AM |
1020 | name = h->root.string; |
1021 | otype = h->type; | |
1022 | if (otype == bfd_link_hash_common) | |
1023 | { | |
1024 | obfd = h->u.c.p->section->owner; | |
1025 | osize = h->u.c.size; | |
1026 | } | |
1027 | else if (otype == bfd_link_hash_defined | |
1028 | || otype == bfd_link_hash_defweak) | |
1029 | { | |
1030 | obfd = h->u.def.section->owner; | |
1031 | osize = 0; | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | /* FIXME: It would nice if we could report the BFD which defined | |
1036 | an indirect symbol, but we don't have anywhere to store the | |
1037 | information. */ | |
1038 | obfd = NULL; | |
1039 | osize = 0; | |
1040 | } | |
1041 | ||
252b5132 RH |
1042 | if (ntype == bfd_link_hash_defined |
1043 | || ntype == bfd_link_hash_defweak | |
1044 | || ntype == bfd_link_hash_indirect) | |
1045 | { | |
1046 | ASSERT (otype == bfd_link_hash_common); | |
1047 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1048 | nbfd, name); | |
1049 | if (obfd != NULL) | |
1050 | einfo (_("%B: warning: common is here\n"), obfd); | |
1051 | } | |
1052 | else if (otype == bfd_link_hash_defined | |
1053 | || otype == bfd_link_hash_defweak | |
1054 | || otype == bfd_link_hash_indirect) | |
1055 | { | |
1056 | ASSERT (ntype == bfd_link_hash_common); | |
1057 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1058 | nbfd, name); | |
1059 | if (obfd != NULL) | |
1060 | einfo (_("%B: warning: defined here\n"), obfd); | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1065 | if (osize > nsize) | |
1066 | { | |
1067 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1068 | nbfd, name); | |
1069 | if (obfd != NULL) | |
1070 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1071 | } | |
1072 | else if (nsize > osize) | |
1073 | { | |
1074 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1075 | nbfd, name); | |
1076 | if (obfd != NULL) | |
1077 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1082 | if (obfd != NULL) | |
1083 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1084 | } | |
1085 | } | |
1086 | ||
b34976b6 | 1087 | return TRUE; |
252b5132 RH |
1088 | } |
1089 | ||
1090 | /* This is called when BFD has discovered a set element. H is the | |
1091 | entry in the linker hash table for the set. SECTION and VALUE | |
1092 | represent a value which should be added to the set. */ | |
1093 | ||
b34976b6 | 1094 | static bfd_boolean |
1579bae1 AM |
1095 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1096 | struct bfd_link_hash_entry *h, | |
1097 | bfd_reloc_code_real_type reloc, | |
1098 | bfd *abfd, | |
1099 | asection *section, | |
1100 | bfd_vma value) | |
252b5132 RH |
1101 | { |
1102 | if (config.warn_constructors) | |
1103 | einfo (_("%P: warning: global constructor %s used\n"), | |
1104 | h->root.string); | |
1105 | ||
1106 | if (! config.build_constructors) | |
b34976b6 | 1107 | return TRUE; |
252b5132 | 1108 | |
1579bae1 | 1109 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1110 | |
1111 | if (h->type == bfd_link_hash_new) | |
1112 | { | |
1113 | h->type = bfd_link_hash_undefined; | |
1114 | h->u.undef.abfd = abfd; | |
1115 | /* We don't call bfd_link_add_undef to add this to the list of | |
1116 | undefined symbols because we are going to define it | |
1117 | ourselves. */ | |
1118 | } | |
1119 | ||
b34976b6 | 1120 | return TRUE; |
252b5132 RH |
1121 | } |
1122 | ||
1123 | /* This is called when BFD has discovered a constructor. This is only | |
1124 | called for some object file formats--those which do not handle | |
1125 | constructors in some more clever fashion. This is similar to | |
1126 | adding an element to a set, but less general. */ | |
1127 | ||
b34976b6 | 1128 | static bfd_boolean |
1579bae1 AM |
1129 | constructor_callback (struct bfd_link_info *info, |
1130 | bfd_boolean constructor, | |
1131 | const char *name, | |
1132 | bfd *abfd, | |
1133 | asection *section, | |
1134 | bfd_vma value) | |
252b5132 RH |
1135 | { |
1136 | char *s; | |
1137 | struct bfd_link_hash_entry *h; | |
1138 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1139 | ||
1140 | if (config.warn_constructors) | |
1141 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1142 | ||
1143 | if (! config.build_constructors) | |
b34976b6 | 1144 | return TRUE; |
252b5132 RH |
1145 | |
1146 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1147 | useful error message. */ | |
f13a99db | 1148 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1149 | && (info->relocatable |
252b5132 RH |
1150 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1151 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1152 | ||
1153 | s = set_name; | |
1154 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1155 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1156 | if (constructor) | |
1157 | strcpy (s, "__CTOR_LIST__"); | |
1158 | else | |
1159 | strcpy (s, "__DTOR_LIST__"); | |
1160 | ||
b34976b6 | 1161 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1162 | if (h == (struct bfd_link_hash_entry *) NULL) |
1163 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1164 | if (h->type == bfd_link_hash_new) | |
1165 | { | |
1166 | h->type = bfd_link_hash_undefined; | |
1167 | h->u.undef.abfd = abfd; | |
1168 | /* We don't call bfd_link_add_undef to add this to the list of | |
1169 | undefined symbols because we are going to define it | |
1170 | ourselves. */ | |
1171 | } | |
1172 | ||
1173 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1174 | return TRUE; |
252b5132 RH |
1175 | } |
1176 | ||
1177 | /* A structure used by warning_callback to pass information through | |
1178 | bfd_map_over_sections. */ | |
1179 | ||
0125cdf2 NC |
1180 | struct warning_callback_info |
1181 | { | |
b34976b6 | 1182 | bfd_boolean found; |
252b5132 RH |
1183 | const char *warning; |
1184 | const char *symbol; | |
1185 | asymbol **asymbols; | |
1186 | }; | |
1187 | ||
1188 | /* This is called when there is a reference to a warning symbol. */ | |
1189 | ||
b34976b6 | 1190 | static bfd_boolean |
1579bae1 AM |
1191 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1192 | const char *warning, | |
1193 | const char *symbol, | |
1194 | bfd *abfd, | |
1195 | asection *section, | |
1196 | bfd_vma address) | |
252b5132 RH |
1197 | { |
1198 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1199 | have a cleaner interface, but what? */ | |
1200 | if (! config.warn_multiple_gp | |
1201 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1202 | return TRUE; |
252b5132 RH |
1203 | |
1204 | if (section != NULL) | |
300475fe | 1205 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1206 | else if (abfd == NULL) |
300475fe | 1207 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1208 | else if (symbol == NULL) |
300475fe | 1209 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1210 | else |
1211 | { | |
91d6fa6a | 1212 | struct warning_callback_info cinfo; |
252b5132 RH |
1213 | |
1214 | /* Look through the relocs to see if we can find a plausible | |
1215 | address. */ | |
5c1d2f5f AM |
1216 | |
1217 | if (!bfd_generic_link_read_symbols (abfd)) | |
1218 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1219 | |
91d6fa6a NC |
1220 | cinfo.found = FALSE; |
1221 | cinfo.warning = warning; | |
1222 | cinfo.symbol = symbol; | |
1223 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1224 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
252b5132 | 1225 | |
91d6fa6a | 1226 | if (! cinfo.found) |
300475fe | 1227 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1228 | } |
1229 | ||
b34976b6 | 1230 | return TRUE; |
252b5132 RH |
1231 | } |
1232 | ||
1233 | /* This is called by warning_callback for each section. It checks the | |
1234 | relocs of the section to see if it can find a reference to the | |
1235 | symbol which triggered the warning. If it can, it uses the reloc | |
1236 | to give an error message with a file and line number. */ | |
1237 | ||
1238 | static void | |
1579bae1 | 1239 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1240 | { |
1e9cc1c2 | 1241 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1242 | long relsize; |
1243 | arelent **relpp; | |
1244 | long relcount; | |
1245 | arelent **p, **pend; | |
1246 | ||
1247 | if (info->found) | |
1248 | return; | |
1249 | ||
1250 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1251 | if (relsize < 0) | |
1252 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1253 | if (relsize == 0) | |
1254 | return; | |
1255 | ||
1e9cc1c2 | 1256 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1257 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1258 | if (relcount < 0) | |
1259 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1260 | ||
1261 | p = relpp; | |
1262 | pend = p + relcount; | |
1263 | for (; p < pend && *p != NULL; p++) | |
1264 | { | |
1265 | arelent *q = *p; | |
1266 | ||
1267 | if (q->sym_ptr_ptr != NULL | |
1268 | && *q->sym_ptr_ptr != NULL | |
1269 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1270 | { | |
1271 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1272 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1273 | info->warning); | |
b34976b6 | 1274 | info->found = TRUE; |
252b5132 RH |
1275 | break; |
1276 | } | |
1277 | } | |
1278 | ||
1279 | free (relpp); | |
1280 | } | |
1281 | ||
1282 | /* This is called when an undefined symbol is found. */ | |
1283 | ||
b34976b6 | 1284 | static bfd_boolean |
1579bae1 AM |
1285 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1286 | const char *name, | |
1287 | bfd *abfd, | |
1288 | asection *section, | |
1289 | bfd_vma address, | |
0b28295d | 1290 | bfd_boolean error) |
252b5132 RH |
1291 | { |
1292 | static char *error_name; | |
1293 | static unsigned int error_count; | |
1294 | ||
1295 | #define MAX_ERRORS_IN_A_ROW 5 | |
1296 | ||
1297 | if (config.warn_once) | |
1298 | { | |
1299 | static struct bfd_hash_table *hash; | |
1300 | ||
1301 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1302 | if (hash == NULL) |
1303 | { | |
1e9cc1c2 NC |
1304 | hash = (struct bfd_hash_table *) |
1305 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
1306 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1307 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1308 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1309 | } | |
1310 | ||
b34976b6 AM |
1311 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1312 | return TRUE; | |
252b5132 | 1313 | |
b34976b6 | 1314 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1315 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1316 | } | |
1317 | ||
1318 | /* We never print more than a reasonable number of errors in a row | |
1319 | for a single symbol. */ | |
1579bae1 | 1320 | if (error_name != NULL |
252b5132 RH |
1321 | && strcmp (name, error_name) == 0) |
1322 | ++error_count; | |
1323 | else | |
1324 | { | |
1325 | error_count = 0; | |
1579bae1 | 1326 | if (error_name != NULL) |
252b5132 | 1327 | free (error_name); |
d1b2b2dc | 1328 | error_name = xstrdup (name); |
252b5132 RH |
1329 | } |
1330 | ||
1331 | if (section != NULL) | |
1332 | { | |
1333 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1334 | { |
0b28295d ILT |
1335 | if (error) |
1336 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1337 | abfd, section, address, name); | |
1338 | else | |
1339 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1340 | abfd, section, address, name); | |
b6f29aaa | 1341 | } |
252b5132 | 1342 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1343 | { |
1344 | if (error) | |
1345 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1346 | abfd, section, address, name); | |
1347 | else | |
1348 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1349 | abfd, section, address, name); | |
1350 | } | |
1351 | else if (error) | |
1352 | einfo ("%X"); | |
252b5132 RH |
1353 | } |
1354 | else | |
1355 | { | |
1356 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1357 | { |
0b28295d ILT |
1358 | if (error) |
1359 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1360 | abfd, name); | |
1361 | else | |
1362 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1363 | abfd, name); | |
b6f29aaa | 1364 | } |
252b5132 | 1365 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1366 | { |
1367 | if (error) | |
1368 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1369 | abfd, name); | |
1370 | else | |
1371 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1372 | abfd, name); | |
1373 | } | |
1374 | else if (error) | |
1375 | einfo ("%X"); | |
252b5132 RH |
1376 | } |
1377 | ||
b34976b6 | 1378 | return TRUE; |
252b5132 RH |
1379 | } |
1380 | ||
8aae64e6 AO |
1381 | /* Counter to limit the number of relocation overflow error messages |
1382 | to print. Errors are printed as it is decremented. When it's | |
1383 | called and the counter is zero, a final message is printed | |
1384 | indicating more relocations were omitted. When it gets to -1, no | |
1385 | such errors are printed. If it's initially set to a value less | |
1386 | than -1, all such errors will be printed (--verbose does this). */ | |
1387 | ||
1388 | int overflow_cutoff_limit = 10; | |
1389 | ||
252b5132 RH |
1390 | /* This is called when a reloc overflows. */ |
1391 | ||
b34976b6 | 1392 | static bfd_boolean |
1579bae1 | 1393 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1394 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1395 | const char *name, |
1396 | const char *reloc_name, | |
1397 | bfd_vma addend, | |
1398 | bfd *abfd, | |
1399 | asection *section, | |
1400 | bfd_vma address) | |
252b5132 | 1401 | { |
8aae64e6 AO |
1402 | if (overflow_cutoff_limit == -1) |
1403 | return TRUE; | |
1404 | ||
270396f2 | 1405 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1406 | |
1407 | if (overflow_cutoff_limit >= 0 | |
1408 | && overflow_cutoff_limit-- == 0) | |
1409 | { | |
1410 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1411 | return TRUE; | |
1412 | } | |
1413 | ||
dfeffb9f L |
1414 | if (entry) |
1415 | { | |
1416 | while (entry->type == bfd_link_hash_indirect | |
1417 | || entry->type == bfd_link_hash_warning) | |
1418 | entry = entry->u.i.link; | |
1419 | switch (entry->type) | |
1420 | { | |
1421 | case bfd_link_hash_undefined: | |
1422 | case bfd_link_hash_undefweak: | |
1423 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1424 | reloc_name, entry->root.string); | |
1425 | break; | |
1426 | case bfd_link_hash_defined: | |
1427 | case bfd_link_hash_defweak: | |
1428 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1429 | reloc_name, entry->root.string, | |
a6e1b90f L |
1430 | entry->u.def.section, |
1431 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1432 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1433 | break; |
1434 | default: | |
1435 | abort (); | |
1436 | break; | |
1437 | } | |
1438 | } | |
1439 | else | |
1440 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1441 | reloc_name, name); | |
252b5132 RH |
1442 | if (addend != 0) |
1443 | einfo ("+%v", addend); | |
1444 | einfo ("\n"); | |
b34976b6 | 1445 | return TRUE; |
252b5132 RH |
1446 | } |
1447 | ||
1448 | /* This is called when a dangerous relocation is made. */ | |
1449 | ||
b34976b6 | 1450 | static bfd_boolean |
1579bae1 AM |
1451 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1452 | const char *message, | |
1453 | bfd *abfd, | |
1454 | asection *section, | |
1455 | bfd_vma address) | |
252b5132 | 1456 | { |
270396f2 | 1457 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1458 | abfd, section, address, message); |
b34976b6 | 1459 | return TRUE; |
252b5132 RH |
1460 | } |
1461 | ||
1462 | /* This is called when a reloc is being generated attached to a symbol | |
1463 | that is not being output. */ | |
1464 | ||
b34976b6 | 1465 | static bfd_boolean |
1579bae1 AM |
1466 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1467 | const char *name, | |
1468 | bfd *abfd, | |
1469 | asection *section, | |
1470 | bfd_vma address) | |
252b5132 | 1471 | { |
270396f2 | 1472 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1473 | abfd, section, address, name); |
b34976b6 | 1474 | return TRUE; |
252b5132 RH |
1475 | } |
1476 | ||
1477 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1478 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1479 | using the -y option, while notice_all is set if the --cref option |
1480 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1481 | linker script; and if plugins are active, since they need to monitor | |
1482 | all references from non-IR files. */ | |
252b5132 | 1483 | |
b34976b6 | 1484 | static bfd_boolean |
1579bae1 | 1485 | notice (struct bfd_link_info *info, |
35ed3f94 | 1486 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1487 | bfd *abfd, |
1488 | asection *section, | |
16d96b5b AM |
1489 | bfd_vma value, |
1490 | flagword flags ATTRIBUTE_UNUSED, | |
1491 | const char *string ATTRIBUTE_UNUSED) | |
252b5132 | 1492 | { |
35ed3f94 AM |
1493 | const char *name; |
1494 | ||
1495 | if (h == NULL) | |
5061a885 AM |
1496 | { |
1497 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1498 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1499 | return TRUE; |
1500 | } | |
1501 | ||
35ed3f94 | 1502 | name = h->root.string; |
5d3236ee | 1503 | if (info->notice_hash != NULL |
9e2278f5 | 1504 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1505 | { |
1506 | if (bfd_is_und_section (section)) | |
1507 | einfo ("%B: reference to %s\n", abfd, name); | |
1508 | else | |
1509 | einfo ("%B: definition of %s\n", abfd, name); | |
1510 | } | |
1511 | ||
1512 | if (command_line.cref || nocrossref_list != NULL) | |
1513 | add_cref (name, abfd, section, value); | |
1514 | ||
b34976b6 | 1515 | return TRUE; |
252b5132 | 1516 | } |