Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
2571583a | 2 | Copyright (C) 1991-2017 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Steve Chamberlain steve@cygnus.com |
4 | ||
f96b4a7b | 5 | This file is part of the GNU Binutils. |
252b5132 | 6 | |
f96b4a7b | 7 | This program is free software; you can redistribute it and/or modify |
2fa9fc65 | 8 | it under the terms of the GNU General Public License as published by |
f96b4a7b NC |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
252b5132 | 11 | |
f96b4a7b | 12 | This program is distributed in the hope that it will be useful, |
2fa9fc65 NC |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
2fa9fc65 | 17 | You should have received a copy of the GNU General Public License |
f96b4a7b NC |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
3882b010 | 24 | #include "safe-ctype.h" |
252b5132 RH |
25 | #include "libiberty.h" |
26 | #include "progress.h" | |
27 | #include "bfdlink.h" | |
5af11cab | 28 | #include "filenames.h" |
252b5132 RH |
29 | |
30 | #include "ld.h" | |
31 | #include "ldmain.h" | |
32 | #include "ldmisc.h" | |
33 | #include "ldwrite.h" | |
252b5132 RH |
34 | #include "ldexp.h" |
35 | #include "ldlang.h" | |
df2a7313 | 36 | #include <ldgram.h> |
252b5132 RH |
37 | #include "ldlex.h" |
38 | #include "ldfile.h" | |
b71e2778 | 39 | #include "ldemul.h" |
252b5132 | 40 | #include "ldctor.h" |
5d3236ee DK |
41 | #ifdef ENABLE_PLUGINS |
42 | #include "plugin.h" | |
43 | #include "plugin-api.h" | |
5d3236ee | 44 | #endif /* ENABLE_PLUGINS */ |
252b5132 | 45 | |
0125cdf2 | 46 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
47 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
48 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
49 | #endif | |
50 | ||
51 | #include <string.h> | |
52 | ||
53 | #ifdef HAVE_SBRK | |
502bdb00 | 54 | #if !HAVE_DECL_SBRK |
1579bae1 | 55 | extern void *sbrk (); |
252b5132 RH |
56 | #endif |
57 | #endif | |
58 | ||
9c8ebd6a DJ |
59 | #ifndef TARGET_SYSTEM_ROOT |
60 | #define TARGET_SYSTEM_ROOT "" | |
61 | #endif | |
62 | ||
252b5132 RH |
63 | /* EXPORTS */ |
64 | ||
53d25da6 AM |
65 | FILE *saved_script_handle = NULL; |
66 | FILE *previous_script_handle = NULL; | |
67 | bfd_boolean force_make_executable = FALSE; | |
68 | ||
252b5132 RH |
69 | char *default_target; |
70 | const char *output_filename = "a.out"; | |
71 | ||
72 | /* Name this program was invoked by. */ | |
73 | char *program_name; | |
74 | ||
9c8ebd6a | 75 | /* The prefix for system library directories. */ |
e2243057 | 76 | const char *ld_sysroot; |
9c8ebd6a | 77 | |
3fe38064 | 78 | /* The canonical representation of ld_sysroot. */ |
0aa7f586 | 79 | char *ld_canon_sysroot; |
3fe38064 NC |
80 | int ld_canon_sysroot_len; |
81 | ||
e8044f35 | 82 | /* Set by -G argument, for targets like MIPS ELF. */ |
252b5132 RH |
83 | int g_switch_value = 8; |
84 | ||
85 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 86 | bfd_boolean trace_files; |
252b5132 | 87 | |
cd6f1cf3 NC |
88 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
89 | bfd_boolean verbose; | |
252b5132 RH |
90 | |
91 | /* Nonzero means version number was printed, so exit successfully | |
92 | instead of complaining if no input files are given. */ | |
b34976b6 | 93 | bfd_boolean version_printed; |
252b5132 | 94 | |
b34976b6 AM |
95 | /* TRUE if we should demangle symbol names. */ |
96 | bfd_boolean demangling; | |
252b5132 RH |
97 | |
98 | args_type command_line; | |
99 | ||
100 | ld_config_type config; | |
101 | ||
bcaa7b3e L |
102 | sort_type sort_section; |
103 | ||
e2243057 RS |
104 | static const char *get_sysroot |
105 | (int, char **); | |
0125cdf2 | 106 | static char *get_emulation |
1579bae1 | 107 | (int, char **); |
0125cdf2 | 108 | static bfd_boolean add_archive_element |
5d3236ee | 109 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
1a72702b | 110 | static void multiple_definition |
24f58f47 | 111 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 112 | bfd *, asection *, bfd_vma); |
1a72702b | 113 | static void multiple_common |
24f58f47 AM |
114 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
115 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
1a72702b | 116 | static void add_to_set |
1579bae1 AM |
117 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
118 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
1a72702b | 119 | static void constructor_callback |
1579bae1 AM |
120 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
121 | asection *, bfd_vma); | |
1a72702b | 122 | static void warning_callback |
1579bae1 AM |
123 | (struct bfd_link_info *, const char *, const char *, bfd *, |
124 | asection *, bfd_vma); | |
0125cdf2 | 125 | static void warning_find_reloc |
1579bae1 | 126 | (bfd *, asection *, void *); |
1a72702b | 127 | static void undefined_symbol |
1579bae1 AM |
128 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
129 | bfd_boolean); | |
1a72702b | 130 | static void reloc_overflow |
dfeffb9f L |
131 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
132 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
1a72702b | 133 | static void reloc_dangerous |
1579bae1 | 134 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
1a72702b | 135 | static void unattached_reloc |
1579bae1 | 136 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 137 | static bfd_boolean notice |
35ed3f94 | 138 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
46135103 | 139 | struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword); |
0125cdf2 NC |
140 | |
141 | static struct bfd_link_callbacks link_callbacks = | |
142 | { | |
252b5132 RH |
143 | add_archive_element, |
144 | multiple_definition, | |
145 | multiple_common, | |
146 | add_to_set, | |
147 | constructor_callback, | |
148 | warning_callback, | |
149 | undefined_symbol, | |
150 | reloc_overflow, | |
151 | reloc_dangerous, | |
152 | unattached_reloc, | |
e1fffbe6 | 153 | notice, |
2889e75b | 154 | einfo, |
49fa1e15 AM |
155 | info_msg, |
156 | minfo, | |
2889e75b | 157 | ldlang_override_segment_assignment |
252b5132 RH |
158 | }; |
159 | ||
3b66a141 | 160 | static bfd_assert_handler_type default_bfd_assert_handler; |
4519d071 | 161 | static bfd_error_handler_type default_bfd_error_handler; |
3b66a141 | 162 | |
252b5132 RH |
163 | struct bfd_link_info link_info; |
164 | \f | |
165 | static void | |
498cd2a0 | 166 | ld_cleanup (void) |
252b5132 | 167 | { |
498cd2a0 AM |
168 | bfd_cache_close_all (); |
169 | #ifdef ENABLE_PLUGINS | |
170 | plugin_call_cleanup (); | |
171 | #endif | |
172 | if (output_filename && delete_output_file_on_failure) | |
173 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
174 | } |
175 | ||
4519d071 | 176 | /* Hook to notice BFD assertions. */ |
3b66a141 HPN |
177 | |
178 | static void | |
179 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, | |
180 | const char *file, int line) | |
181 | { | |
3b66a141 | 182 | config.make_executable = FALSE; |
4519d071 AM |
183 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); |
184 | } | |
185 | ||
186 | /* Hook the bfd error/warning handler for --fatal-warnings. */ | |
187 | ||
188 | static void | |
189 | ld_bfd_error_handler (const char *fmt, va_list ap) | |
190 | { | |
191 | if (config.fatal_warnings) | |
192 | config.make_executable = FALSE; | |
193 | (*default_bfd_error_handler) (fmt, ap); | |
3b66a141 HPN |
194 | } |
195 | ||
252b5132 | 196 | int |
1579bae1 | 197 | main (int argc, char **argv) |
252b5132 RH |
198 | { |
199 | char *emulation; | |
200 | long start_time = get_run_time (); | |
24a09713 SB |
201 | #ifdef HAVE_SBRK |
202 | char *start_sbrk = (char *) sbrk (0); | |
203 | #endif | |
252b5132 RH |
204 | |
205 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
206 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
207 | #endif |
208 | #if defined (HAVE_SETLOCALE) | |
209 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
210 | #endif |
211 | bindtextdomain (PACKAGE, LOCALEDIR); | |
212 | textdomain (PACKAGE); | |
213 | ||
214 | program_name = argv[0]; | |
215 | xmalloc_set_program_name (program_name); | |
216 | ||
217 | START_PROGRESS (program_name, 0); | |
218 | ||
869b9d07 MM |
219 | expandargv (&argc, &argv); |
220 | ||
252b5132 RH |
221 | bfd_init (); |
222 | ||
223 | bfd_set_error_program_name (program_name); | |
224 | ||
3b66a141 HPN |
225 | /* We want to notice and fail on those nasty BFD assertions which are |
226 | likely to signal incorrect output being generated but otherwise may | |
227 | leave no trace. */ | |
228 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); | |
229 | ||
4519d071 AM |
230 | /* Also hook the bfd error/warning handler for --fatal-warnings. */ |
231 | default_bfd_error_handler = bfd_set_error_handler (ld_bfd_error_handler); | |
232 | ||
498cd2a0 | 233 | xatexit (ld_cleanup); |
252b5132 | 234 | |
e2243057 RS |
235 | /* Set up the sysroot directory. */ |
236 | ld_sysroot = get_sysroot (argc, argv); | |
237 | if (*ld_sysroot) | |
3074964f | 238 | ld_canon_sysroot = lrealpath (ld_sysroot); |
3fe38064 NC |
239 | if (ld_canon_sysroot) |
240 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
241 | else | |
242 | ld_canon_sysroot_len = -1; | |
243 | ||
252b5132 RH |
244 | /* Set the default BFD target based on the configured target. Doing |
245 | this permits the linker to be configured for a particular target, | |
246 | and linked against a shared BFD library which was configured for | |
247 | a different target. The macro TARGET is defined by Makefile. */ | |
0aa7f586 | 248 | if (!bfd_set_default_target (TARGET)) |
252b5132 RH |
249 | { |
250 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
251 | xexit (1); | |
252 | } | |
253 | ||
b47c4208 AM |
254 | #if YYDEBUG |
255 | { | |
256 | extern int yydebug; | |
257 | yydebug = 1; | |
258 | } | |
259 | #endif | |
260 | ||
b34976b6 | 261 | config.build_constructors = TRUE; |
c76308d2 | 262 | config.rpath_separator = ':'; |
a854a4a7 AM |
263 | config.split_by_reloc = (unsigned) -1; |
264 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
265 | config.make_executable = TRUE; |
266 | config.magic_demand_paged = TRUE; | |
267 | config.text_read_only = TRUE; | |
4f9d22a0 | 268 | link_info.disable_target_specific_optimizations = -1; |
3b95049e | 269 | |
b34976b6 | 270 | command_line.warn_mismatch = TRUE; |
fe7929ce | 271 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 272 | command_line.check_section_addresses = -1; |
bcaa7b3e | 273 | |
252b5132 RH |
274 | /* We initialize DEMANGLING based on the environment variable |
275 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
276 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
277 | environment. Acting the same way here lets us provide the same | |
278 | interface by default. */ | |
279 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
280 | ||
b34976b6 | 281 | link_info.allow_undefined_version = TRUE; |
b5067602 | 282 | link_info.keep_memory = TRUE; |
b5067602 | 283 | link_info.combreloc = TRUE; |
d5cd3933 | 284 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 285 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
286 | link_info.callbacks = &link_callbacks; |
287 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
288 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
289 | and _fini symbols. We are compatible. */ | |
290 | link_info.init_function = "_init"; | |
291 | link_info.fini_function = "_fini"; | |
a9a4c53e | 292 | link_info.relax_pass = 1; |
889c2a67 | 293 | link_info.extern_protected_data = -1; |
aec6b87e | 294 | link_info.dynamic_undefined_weak = -1; |
e0076ab3 | 295 | link_info.pei386_auto_import = -1; |
db6751f2 | 296 | link_info.spare_dynamic_tags = 5; |
967928e9 | 297 | link_info.path_separator = ':'; |
6c3bc0f8 NC |
298 | #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
299 | link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; | |
300 | #endif | |
24718e3b | 301 | |
252b5132 | 302 | ldfile_add_arch (""); |
252b5132 RH |
303 | emulation = get_emulation (argc, argv); |
304 | ldemul_choose_mode (emulation); | |
742aeb63 | 305 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
306 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
307 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 | 308 | lang_init (); |
18d6a79d | 309 | ldexp_init (); |
252b5132 | 310 | ldemul_before_parse (); |
b34976b6 | 311 | lang_has_input_file = FALSE; |
252b5132 RH |
312 | parse_args (argc, argv); |
313 | ||
2d643429 NC |
314 | if (config.hash_table_size != 0) |
315 | bfd_hash_set_default_size (config.hash_table_size); | |
316 | ||
9bbc1a67 AM |
317 | #ifdef ENABLE_PLUGINS |
318 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
d82184d7 | 319 | plugin_load_plugins (); |
9bbc1a67 | 320 | #endif /* ENABLE_PLUGINS */ |
36af4a4e | 321 | |
9bbc1a67 | 322 | ldemul_set_symbols (); |
252b5132 | 323 | |
14be8564 L |
324 | /* If we have not already opened and parsed a linker script, |
325 | try the default script from command line first. */ | |
326 | if (saved_script_handle == NULL | |
327 | && command_line.default_script != NULL) | |
328 | { | |
329 | ldfile_open_command_file (command_line.default_script); | |
330 | parser_input = input_script; | |
331 | yyparse (); | |
332 | } | |
333 | ||
b9a8de1e NC |
334 | /* If we have not already opened and parsed a linker script |
335 | read the emulation's appropriate default script. */ | |
b90e1c6f | 336 | if (saved_script_handle == NULL) |
252b5132 | 337 | { |
252b5132 | 338 | int isfile; |
b7a26f91 | 339 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
340 | |
341 | if (isfile) | |
7d24f02c | 342 | ldfile_open_default_command_file (s); |
252b5132 | 343 | else |
b7a26f91 | 344 | { |
252b5132 | 345 | lex_string = s; |
dab69f68 | 346 | lex_redirect (s, _("built in linker script"), 1); |
252b5132 RH |
347 | } |
348 | parser_input = input_script; | |
349 | yyparse (); | |
350 | lex_string = NULL; | |
351 | } | |
352 | ||
cd6f1cf3 | 353 | if (verbose) |
b9a8de1e | 354 | { |
9cb61eab AM |
355 | if (saved_script_handle) |
356 | info_msg (_("using external linker script:")); | |
357 | else | |
358 | info_msg (_("using internal linker script:")); | |
359 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
360 | |
361 | if (saved_script_handle) | |
362 | { | |
74699268 | 363 | static const int ld_bufsz = 8193; |
b9a8de1e | 364 | size_t n; |
1e9cc1c2 | 365 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
366 | |
367 | rewind (saved_script_handle); | |
74699268 | 368 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 369 | { |
b7a26f91 | 370 | buf[n] = 0; |
f5ac6ab3 | 371 | info_msg ("%s", buf); |
b9a8de1e NC |
372 | } |
373 | rewind (saved_script_handle); | |
374 | free (buf); | |
375 | } | |
376 | else | |
377 | { | |
378 | int isfile; | |
379 | ||
b7a26f91 | 380 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 381 | } |
b7a26f91 | 382 | |
b9a8de1e NC |
383 | info_msg ("\n==================================================\n"); |
384 | } | |
385 | ||
30824704 RM |
386 | if (command_line.print_output_format) |
387 | info_msg ("%s\n", lang_get_output_target ()); | |
388 | ||
252b5132 RH |
389 | lang_final (); |
390 | ||
61e2488c JT |
391 | /* If the only command line argument has been -v or --version or --verbose |
392 | then ignore any input files provided by linker scripts and exit now. | |
393 | We do not want to create an output file when the linker is just invoked | |
394 | to provide version information. */ | |
395 | if (argc == 2 && version_printed) | |
396 | xexit (0); | |
397 | ||
b34976b6 | 398 | if (!lang_has_input_file) |
252b5132 | 399 | { |
30824704 | 400 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
401 | xexit (0); |
402 | einfo (_("%P%F: no input files\n")); | |
403 | } | |
404 | ||
405 | if (trace_files) | |
0125cdf2 | 406 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
407 | |
408 | ldemul_after_parse (); | |
409 | ||
252b5132 RH |
410 | if (config.map_filename) |
411 | { | |
412 | if (strcmp (config.map_filename, "-") == 0) | |
413 | { | |
414 | config.map_file = stdout; | |
415 | } | |
416 | else | |
417 | { | |
418 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
419 | if (config.map_file == (FILE *) NULL) | |
420 | { | |
421 | bfd_set_error (bfd_error_system_call); | |
422 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
423 | config.map_filename); | |
424 | } | |
425 | } | |
426 | } | |
427 | ||
252b5132 RH |
428 | lang_process (); |
429 | ||
430 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 431 | symbols, and possibly multiple definitions. */ |
0e1862bb | 432 | if (bfd_link_relocatable (&link_info)) |
f13a99db | 433 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 434 | else |
f13a99db | 435 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 | 436 | |
0ce398f1 L |
437 | if ((link_info.compress_debug & COMPRESS_DEBUG)) |
438 | { | |
439 | link_info.output_bfd->flags |= BFD_COMPRESS; | |
440 | if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
441 | link_info.output_bfd->flags |= BFD_COMPRESS_GABI; | |
442 | } | |
443 | ||
252b5132 RH |
444 | ldwrite (); |
445 | ||
446 | if (config.map_file != NULL) | |
447 | lang_map (); | |
448 | if (command_line.cref) | |
449 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
450 | if (nocrossref_list != NULL) | |
451 | check_nocrossrefs (); | |
3604cb1f TG |
452 | if (command_line.print_memory_usage) |
453 | lang_print_memory_usage (); | |
edf84efc NC |
454 | #if 0 |
455 | { | |
0aa7f586 | 456 | struct bfd_link_hash_entry *h; |
252b5132 | 457 | |
edf84efc NC |
458 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
459 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); | |
460 | } | |
461 | #endif | |
18d6a79d | 462 | ldexp_finish (); |
750877ba L |
463 | lang_finish (); |
464 | ||
1049f94e | 465 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 466 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 467 | want to ignore for relocatable output?) */ |
b34976b6 | 468 | if (!config.make_executable && !force_make_executable) |
252b5132 | 469 | { |
b34976b6 | 470 | if (trace_files) |
0125cdf2 NC |
471 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
472 | output_filename); | |
252b5132 | 473 | |
4309cbf2 | 474 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
475 | xexit (1); |
476 | } | |
477 | else | |
478 | { | |
0aa7f586 | 479 | if (!bfd_close (link_info.output_bfd)) |
f13a99db | 480 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); |
252b5132 RH |
481 | |
482 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
483 | executable file and it doesn't end in .exe, copy it to one |
484 | which does. */ | |
0e1862bb L |
485 | if (!bfd_link_relocatable (&link_info) |
486 | && command_line.force_exe_suffix) | |
252b5132 RH |
487 | { |
488 | int len = strlen (output_filename); | |
0125cdf2 | 489 | |
6d5e62f8 | 490 | if (len < 4 |
252b5132 RH |
491 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
492 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
493 | { | |
494 | FILE *src; | |
495 | FILE *dst; | |
496 | const int bsize = 4096; | |
1e9cc1c2 | 497 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 498 | int l; |
1e9cc1c2 | 499 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 500 | |
252b5132 RH |
501 | strcpy (dst_name, output_filename); |
502 | strcat (dst_name, ".exe"); | |
503 | src = fopen (output_filename, FOPEN_RB); | |
504 | dst = fopen (dst_name, FOPEN_WB); | |
505 | ||
506 | if (!src) | |
b3862264 | 507 | einfo (_("%P%F: unable to open for source of copy `%s'\n"), |
1579bae1 | 508 | output_filename); |
252b5132 | 509 | if (!dst) |
b3862264 | 510 | einfo (_("%P%F: unable to open for destination of copy `%s'\n"), |
1579bae1 | 511 | dst_name); |
252b5132 RH |
512 | while ((l = fread (buf, 1, bsize, src)) > 0) |
513 | { | |
514 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 515 | |
252b5132 | 516 | if (done != l) |
0125cdf2 | 517 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 518 | } |
0125cdf2 | 519 | |
252b5132 RH |
520 | fclose (src); |
521 | if (fclose (dst) == EOF) | |
0125cdf2 | 522 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
523 | free (dst_name); |
524 | free (buf); | |
525 | } | |
526 | } | |
527 | } | |
528 | ||
529 | END_PROGRESS (program_name); | |
530 | ||
531 | if (config.stats) | |
532 | { | |
533 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 534 | char *lim = (char *) sbrk (0); |
252b5132 RH |
535 | #endif |
536 | long run_time = get_run_time () - start_time; | |
537 | ||
e922bcab | 538 | fflush (stdout); |
252b5132 RH |
539 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
540 | program_name, run_time / 1000000, run_time % 1000000); | |
541 | #ifdef HAVE_SBRK | |
542 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
24a09713 | 543 | (long) (lim - start_sbrk)); |
252b5132 | 544 | #endif |
e922bcab | 545 | fflush (stderr); |
252b5132 RH |
546 | } |
547 | ||
4309cbf2 | 548 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
549 | output_filename = NULL; |
550 | ||
551 | xexit (0); | |
552 | return 0; | |
553 | } | |
554 | ||
e2243057 RS |
555 | /* If the configured sysroot is relocatable, try relocating it based on |
556 | default prefix FROM. Return the relocated directory if it exists, | |
557 | otherwise return null. */ | |
558 | ||
559 | static char * | |
560 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
561 | { | |
562 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
563 | char *path; | |
564 | struct stat s; | |
565 | ||
566 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
567 | if (path) | |
568 | { | |
569 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
570 | return path; | |
571 | free (path); | |
572 | } | |
573 | #endif | |
574 | return 0; | |
575 | } | |
576 | ||
577 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
578 | ||
579 | static const char * | |
580 | get_sysroot (int argc, char **argv) | |
581 | { | |
582 | int i; | |
583 | const char *path; | |
584 | ||
585 | for (i = 1; i < argc; i++) | |
0112cd26 | 586 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
587 | return argv[i] + strlen ("--sysroot="); |
588 | ||
589 | path = get_relative_sysroot (BINDIR); | |
590 | if (path) | |
591 | return path; | |
592 | ||
593 | path = get_relative_sysroot (TOOLBINDIR); | |
594 | if (path) | |
595 | return path; | |
596 | ||
597 | return TARGET_SYSTEM_ROOT; | |
598 | } | |
599 | ||
252b5132 RH |
600 | /* We need to find any explicitly given emulation in order to initialize the |
601 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
602 | ||
603 | static char * | |
1579bae1 | 604 | get_emulation (int argc, char **argv) |
252b5132 RH |
605 | { |
606 | char *emulation; | |
607 | int i; | |
608 | ||
609 | emulation = getenv (EMULATION_ENVIRON); | |
610 | if (emulation == NULL) | |
611 | emulation = DEFAULT_EMULATION; | |
612 | ||
613 | for (i = 1; i < argc; i++) | |
614 | { | |
0112cd26 | 615 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
616 | { |
617 | if (argv[i][2] == '\0') | |
618 | { | |
619 | /* -m EMUL */ | |
620 | if (i < argc - 1) | |
621 | { | |
622 | emulation = argv[i + 1]; | |
623 | i++; | |
624 | } | |
625 | else | |
0125cdf2 | 626 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
627 | } |
628 | else if (strcmp (argv[i], "-mips1") == 0 | |
629 | || strcmp (argv[i], "-mips2") == 0 | |
630 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 631 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
632 | || strcmp (argv[i], "-mips5") == 0 |
633 | || strcmp (argv[i], "-mips32") == 0 | |
634 | || strcmp (argv[i], "-mips32r2") == 0 | |
7361da2c | 635 | || strcmp (argv[i], "-mips32r6") == 0 |
5f74bc13 | 636 | || strcmp (argv[i], "-mips64") == 0 |
7361da2c AB |
637 | || strcmp (argv[i], "-mips64r2") == 0 |
638 | || strcmp (argv[i], "-mips64r6") == 0) | |
252b5132 | 639 | { |
31d677f9 | 640 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
641 | passed to the linker by some MIPS compilers. They |
642 | generally tell the linker to use a slightly different | |
643 | library path. Perhaps someday these should be | |
644 | implemented as emulations; until then, we just ignore | |
645 | the arguments and hope that nobody ever creates | |
646 | emulations named ips1, ips2 or ips3. */ | |
647 | } | |
648 | else if (strcmp (argv[i], "-m486") == 0) | |
649 | { | |
650 | /* FIXME: The argument -m486 is passed to the linker on | |
651 | some Linux systems. Hope that nobody creates an | |
652 | emulation named 486. */ | |
653 | } | |
654 | else | |
655 | { | |
656 | /* -mEMUL */ | |
657 | emulation = &argv[i][2]; | |
658 | } | |
659 | } | |
660 | } | |
661 | ||
662 | return emulation; | |
663 | } | |
664 | ||
252b5132 | 665 | void |
1579bae1 | 666 | add_ysym (const char *name) |
252b5132 | 667 | { |
1579bae1 | 668 | if (link_info.notice_hash == NULL) |
252b5132 | 669 | { |
0aa7f586 AM |
670 | link_info.notice_hash |
671 | = (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
672 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
673 | bfd_hash_newfunc, | |
674 | sizeof (struct bfd_hash_entry), | |
675 | 61)) | |
252b5132 | 676 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 677 | } |
252b5132 | 678 | |
1579bae1 | 679 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
680 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
681 | } | |
682 | ||
0e86e20e AM |
683 | void |
684 | add_ignoresym (struct bfd_link_info *info, const char *name) | |
685 | { | |
686 | if (info->ignore_hash == NULL) | |
687 | { | |
688 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); | |
0aa7f586 AM |
689 | if (!bfd_hash_table_init_n (info->ignore_hash, |
690 | bfd_hash_newfunc, | |
691 | sizeof (struct bfd_hash_entry), | |
692 | 61)) | |
0e86e20e AM |
693 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
694 | } | |
695 | ||
696 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) | |
697 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
698 | } | |
699 | ||
252b5132 RH |
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 | { | |
0aa7f586 AM |
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 | ||
0aa7f586 | 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 | 783 | link_info.strip = strip_some; |
d9313f4f | 784 | fclose (file); |
252b5132 RH |
785 | } |
786 | \f | |
787 | /* Callbacks from the BFD linker routines. */ | |
788 | ||
789 | /* This is called when BFD has decided to include an archive member in | |
790 | a link. */ | |
791 | ||
b34976b6 | 792 | static bfd_boolean |
e1fffbe6 | 793 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 794 | bfd *abfd, |
5d3236ee DK |
795 | const char *name, |
796 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
797 | { |
798 | lang_input_statement_type *input; | |
5d3236ee | 799 | lang_input_statement_type orig_input; |
252b5132 | 800 | |
1e9cc1c2 NC |
801 | input = (lang_input_statement_type *) |
802 | xcalloc (1, sizeof (lang_input_statement_type)); | |
fb47deda | 803 | input->header.type = lang_input_statement_enum; |
252b5132 RH |
804 | input->filename = abfd->filename; |
805 | input->local_sym_name = abfd->filename; | |
806 | input->the_bfd = abfd; | |
252b5132 | 807 | |
5d3236ee DK |
808 | /* Save the original data for trace files/tries below, as plugins |
809 | (if enabled) may possibly alter it to point to a replacement | |
810 | BFD, but we still want to output the original BFD filename. */ | |
811 | orig_input = *input; | |
812 | #ifdef ENABLE_PLUGINS | |
b95a0a31 | 813 | if (link_info.lto_plugin_active) |
5d3236ee DK |
814 | { |
815 | /* We must offer this archive member to the plugins to claim. */ | |
35a1e5f3 L |
816 | plugin_maybe_claim (input); |
817 | if (input->flags.claimed) | |
5d3236ee | 818 | { |
b95a0a31 L |
819 | if (no_more_claiming) |
820 | { | |
821 | /* Don't claim new IR symbols after all IR symbols have | |
822 | been claimed. */ | |
823 | if (trace_files || verbose) | |
824 | info_msg ("%I: no new IR symbols to claimi\n", | |
825 | &orig_input); | |
826 | input->flags.claimed = 0; | |
827 | return FALSE; | |
828 | } | |
35a1e5f3 L |
829 | input->flags.claim_archive = TRUE; |
830 | *subsbfd = input->the_bfd; | |
5d3236ee DK |
831 | } |
832 | } | |
833 | #endif /* ENABLE_PLUGINS */ | |
834 | ||
252b5132 RH |
835 | ldlang_add_file (input); |
836 | ||
1579bae1 | 837 | if (config.map_file != NULL) |
252b5132 | 838 | { |
b34976b6 | 839 | static bfd_boolean header_printed; |
252b5132 RH |
840 | struct bfd_link_hash_entry *h; |
841 | bfd *from; | |
842 | int len; | |
843 | ||
e1fffbe6 | 844 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
845 | |
846 | if (h == NULL) | |
847 | from = NULL; | |
848 | else | |
849 | { | |
850 | switch (h->type) | |
851 | { | |
852 | default: | |
853 | from = NULL; | |
854 | break; | |
855 | ||
856 | case bfd_link_hash_defined: | |
857 | case bfd_link_hash_defweak: | |
858 | from = h->u.def.section->owner; | |
859 | break; | |
860 | ||
861 | case bfd_link_hash_undefined: | |
862 | case bfd_link_hash_undefweak: | |
863 | from = h->u.undef.abfd; | |
864 | break; | |
865 | ||
866 | case bfd_link_hash_common: | |
867 | from = h->u.c.p->section->owner; | |
868 | break; | |
869 | } | |
870 | } | |
871 | ||
0aa7f586 | 872 | if (!header_printed) |
252b5132 | 873 | { |
1273da04 | 874 | minfo (_("Archive member included to satisfy reference by file (symbol)\n\n")); |
b34976b6 | 875 | header_printed = TRUE; |
252b5132 RH |
876 | } |
877 | ||
3860d2b4 AM |
878 | if (abfd->my_archive == NULL |
879 | || bfd_is_thin_archive (abfd->my_archive)) | |
252b5132 RH |
880 | { |
881 | minfo ("%s", bfd_get_filename (abfd)); | |
882 | len = strlen (bfd_get_filename (abfd)); | |
883 | } | |
884 | else | |
885 | { | |
3860d2b4 | 886 | minfo ("%s(%s)", bfd_get_filename (abfd->my_archive), |
252b5132 | 887 | bfd_get_filename (abfd)); |
3860d2b4 | 888 | len = (strlen (bfd_get_filename (abfd->my_archive)) |
252b5132 RH |
889 | + strlen (bfd_get_filename (abfd)) |
890 | + 2); | |
891 | } | |
892 | ||
893 | if (len >= 29) | |
894 | { | |
895 | print_nl (); | |
896 | len = 0; | |
897 | } | |
898 | while (len < 30) | |
899 | { | |
900 | print_space (); | |
901 | ++len; | |
902 | } | |
903 | ||
904 | if (from != NULL) | |
905 | minfo ("%B ", from); | |
906 | if (h != NULL) | |
907 | minfo ("(%T)\n", h->root.string); | |
908 | else | |
909 | minfo ("(%s)\n", name); | |
910 | } | |
911 | ||
cd6f1cf3 | 912 | if (trace_files || verbose) |
5d3236ee | 913 | info_msg ("%I\n", &orig_input); |
b34976b6 | 914 | return TRUE; |
252b5132 RH |
915 | } |
916 | ||
917 | /* This is called when BFD has discovered a symbol which is defined | |
918 | multiple times. */ | |
919 | ||
1a72702b | 920 | static void |
24f58f47 AM |
921 | multiple_definition (struct bfd_link_info *info, |
922 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
923 | bfd *nbfd, |
924 | asection *nsec, | |
925 | bfd_vma nval) | |
252b5132 | 926 | { |
24f58f47 AM |
927 | const char *name; |
928 | bfd *obfd; | |
929 | asection *osec; | |
930 | bfd_vma oval; | |
931 | ||
932 | if (info->allow_multiple_definition) | |
1a72702b | 933 | return; |
24f58f47 AM |
934 | |
935 | switch (h->type) | |
936 | { | |
937 | case bfd_link_hash_defined: | |
938 | osec = h->u.def.section; | |
939 | oval = h->u.def.value; | |
940 | obfd = h->u.def.section->owner; | |
941 | break; | |
942 | case bfd_link_hash_indirect: | |
943 | osec = bfd_ind_section_ptr; | |
944 | oval = 0; | |
945 | obfd = NULL; | |
946 | break; | |
947 | default: | |
948 | abort (); | |
949 | } | |
950 | ||
951 | /* Ignore a redefinition of an absolute symbol to the | |
952 | same value; it's harmless. */ | |
953 | if (h->type == bfd_link_hash_defined | |
954 | && bfd_is_abs_section (osec) | |
955 | && bfd_is_abs_section (nsec) | |
956 | && nval == oval) | |
1a72702b | 957 | return; |
24f58f47 | 958 | |
252b5132 RH |
959 | /* If either section has the output_section field set to |
960 | bfd_abs_section_ptr, it means that the section is being | |
961 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
962 | FIXME: It would be cleaner to somehow ignore symbols defined in |
963 | sections which are being discarded. */ | |
252b5132 | 964 | if ((osec->output_section != NULL |
0aa7f586 | 965 | && !bfd_is_abs_section (osec) |
252b5132 RH |
966 | && bfd_is_abs_section (osec->output_section)) |
967 | || (nsec->output_section != NULL | |
0aa7f586 | 968 | && !bfd_is_abs_section (nsec) |
252b5132 | 969 | && bfd_is_abs_section (nsec->output_section))) |
1a72702b | 970 | return; |
252b5132 | 971 | |
24f58f47 AM |
972 | name = h->root.string; |
973 | if (nbfd == NULL) | |
974 | { | |
975 | nbfd = obfd; | |
976 | nsec = osec; | |
977 | nval = oval; | |
978 | obfd = NULL; | |
979 | } | |
252b5132 RH |
980 | einfo (_("%X%C: multiple definition of `%T'\n"), |
981 | nbfd, nsec, nval, name); | |
1579bae1 | 982 | if (obfd != NULL) |
252b5132 | 983 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 984 | |
13761a11 | 985 | if (RELAXATION_ENABLED_BY_USER) |
9b14b192 NC |
986 | { |
987 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
13761a11 | 988 | DISABLE_RELAXATION; |
9b14b192 | 989 | } |
252b5132 RH |
990 | } |
991 | ||
992 | /* This is called when there is a definition of a common symbol, or | |
993 | when a common symbol is found for a symbol that is already defined, | |
994 | or when two common symbols are found. We only do something if | |
995 | -warn-common was used. */ | |
996 | ||
1a72702b | 997 | static void |
1579bae1 | 998 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 999 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1000 | bfd *nbfd, |
1001 | enum bfd_link_hash_type ntype, | |
1002 | bfd_vma nsize) | |
252b5132 | 1003 | { |
24f58f47 AM |
1004 | const char *name; |
1005 | bfd *obfd; | |
1006 | enum bfd_link_hash_type otype; | |
1007 | bfd_vma osize; | |
1008 | ||
1009 | if (!config.warn_common) | |
1a72702b | 1010 | return; |
252b5132 | 1011 | |
24f58f47 AM |
1012 | name = h->root.string; |
1013 | otype = h->type; | |
1014 | if (otype == bfd_link_hash_common) | |
1015 | { | |
1016 | obfd = h->u.c.p->section->owner; | |
1017 | osize = h->u.c.size; | |
1018 | } | |
1019 | else if (otype == bfd_link_hash_defined | |
1020 | || otype == bfd_link_hash_defweak) | |
1021 | { | |
1022 | obfd = h->u.def.section->owner; | |
1023 | osize = 0; | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | /* FIXME: It would nice if we could report the BFD which defined | |
1028 | an indirect symbol, but we don't have anywhere to store the | |
1029 | information. */ | |
1030 | obfd = NULL; | |
1031 | osize = 0; | |
1032 | } | |
1033 | ||
252b5132 RH |
1034 | if (ntype == bfd_link_hash_defined |
1035 | || ntype == bfd_link_hash_defweak | |
1036 | || ntype == bfd_link_hash_indirect) | |
1037 | { | |
1038 | ASSERT (otype == bfd_link_hash_common); | |
1039 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1040 | nbfd, name); | |
1041 | if (obfd != NULL) | |
1042 | einfo (_("%B: warning: common is here\n"), obfd); | |
1043 | } | |
1044 | else if (otype == bfd_link_hash_defined | |
1045 | || otype == bfd_link_hash_defweak | |
1046 | || otype == bfd_link_hash_indirect) | |
1047 | { | |
1048 | ASSERT (ntype == bfd_link_hash_common); | |
1049 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1050 | nbfd, name); | |
1051 | if (obfd != NULL) | |
1052 | einfo (_("%B: warning: defined here\n"), obfd); | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1057 | if (osize > nsize) | |
1058 | { | |
1059 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1060 | nbfd, name); | |
1061 | if (obfd != NULL) | |
1062 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1063 | } | |
1064 | else if (nsize > osize) | |
1065 | { | |
1066 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1067 | nbfd, name); | |
1068 | if (obfd != NULL) | |
1069 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1074 | if (obfd != NULL) | |
1075 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1076 | } | |
1077 | } | |
252b5132 RH |
1078 | } |
1079 | ||
1080 | /* This is called when BFD has discovered a set element. H is the | |
1081 | entry in the linker hash table for the set. SECTION and VALUE | |
1082 | represent a value which should be added to the set. */ | |
1083 | ||
1a72702b | 1084 | static void |
1579bae1 AM |
1085 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1086 | struct bfd_link_hash_entry *h, | |
1087 | bfd_reloc_code_real_type reloc, | |
1088 | bfd *abfd, | |
1089 | asection *section, | |
1090 | bfd_vma value) | |
252b5132 RH |
1091 | { |
1092 | if (config.warn_constructors) | |
1093 | einfo (_("%P: warning: global constructor %s used\n"), | |
1094 | h->root.string); | |
1095 | ||
0aa7f586 | 1096 | if (!config.build_constructors) |
1a72702b | 1097 | return; |
252b5132 | 1098 | |
1579bae1 | 1099 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1100 | |
1101 | if (h->type == bfd_link_hash_new) | |
1102 | { | |
1103 | h->type = bfd_link_hash_undefined; | |
1104 | h->u.undef.abfd = abfd; | |
1105 | /* We don't call bfd_link_add_undef to add this to the list of | |
1106 | undefined symbols because we are going to define it | |
1107 | ourselves. */ | |
1108 | } | |
252b5132 RH |
1109 | } |
1110 | ||
1111 | /* This is called when BFD has discovered a constructor. This is only | |
1112 | called for some object file formats--those which do not handle | |
1113 | constructors in some more clever fashion. This is similar to | |
1114 | adding an element to a set, but less general. */ | |
1115 | ||
1a72702b | 1116 | static void |
1579bae1 AM |
1117 | constructor_callback (struct bfd_link_info *info, |
1118 | bfd_boolean constructor, | |
1119 | const char *name, | |
1120 | bfd *abfd, | |
1121 | asection *section, | |
1122 | bfd_vma value) | |
252b5132 RH |
1123 | { |
1124 | char *s; | |
1125 | struct bfd_link_hash_entry *h; | |
1126 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1127 | ||
1128 | if (config.warn_constructors) | |
1129 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1130 | ||
0aa7f586 | 1131 | if (!config.build_constructors) |
1a72702b | 1132 | return; |
252b5132 RH |
1133 | |
1134 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1135 | useful error message. */ | |
0e86e20e | 1136 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
0e1862bb | 1137 | && (bfd_link_relocatable (info) |
252b5132 RH |
1138 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1139 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1140 | ||
1141 | s = set_name; | |
1142 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1143 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1144 | if (constructor) | |
1145 | strcpy (s, "__CTOR_LIST__"); | |
1146 | else | |
1147 | strcpy (s, "__DTOR_LIST__"); | |
1148 | ||
b34976b6 | 1149 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1150 | if (h == (struct bfd_link_hash_entry *) NULL) |
1151 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1152 | if (h->type == bfd_link_hash_new) | |
1153 | { | |
1154 | h->type = bfd_link_hash_undefined; | |
1155 | h->u.undef.abfd = abfd; | |
1156 | /* We don't call bfd_link_add_undef to add this to the list of | |
1157 | undefined symbols because we are going to define it | |
1158 | ourselves. */ | |
1159 | } | |
1160 | ||
1161 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
252b5132 RH |
1162 | } |
1163 | ||
1164 | /* A structure used by warning_callback to pass information through | |
1165 | bfd_map_over_sections. */ | |
1166 | ||
0125cdf2 NC |
1167 | struct warning_callback_info |
1168 | { | |
b34976b6 | 1169 | bfd_boolean found; |
252b5132 RH |
1170 | const char *warning; |
1171 | const char *symbol; | |
1172 | asymbol **asymbols; | |
1173 | }; | |
1174 | ||
4c6d802e L |
1175 | /* Look through the relocs to see if we can find a plausible address |
1176 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ | |
1177 | ||
1178 | static bfd_boolean | |
1179 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) | |
1180 | { | |
1181 | struct warning_callback_info cinfo; | |
1182 | ||
1183 | if (!bfd_generic_link_read_symbols (abfd)) | |
1184 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1185 | ||
1186 | cinfo.found = FALSE; | |
1187 | cinfo.warning = warning; | |
1188 | cinfo.symbol = symbol; | |
1189 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1190 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
1191 | return cinfo.found; | |
1192 | } | |
1193 | ||
252b5132 RH |
1194 | /* This is called when there is a reference to a warning symbol. */ |
1195 | ||
1a72702b | 1196 | static void |
1579bae1 AM |
1197 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1198 | const char *warning, | |
1199 | const char *symbol, | |
1200 | bfd *abfd, | |
1201 | asection *section, | |
1202 | bfd_vma address) | |
252b5132 RH |
1203 | { |
1204 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1205 | have a cleaner interface, but what? */ | |
0aa7f586 | 1206 | if (!config.warn_multiple_gp |
252b5132 | 1207 | && strcmp (warning, "using multiple gp values") == 0) |
1a72702b | 1208 | return; |
252b5132 RH |
1209 | |
1210 | if (section != NULL) | |
300475fe | 1211 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1212 | else if (abfd == NULL) |
300475fe | 1213 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1214 | else if (symbol == NULL) |
300475fe | 1215 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
0aa7f586 | 1216 | else if (!symbol_warning (warning, symbol, abfd)) |
252b5132 | 1217 | { |
4c6d802e L |
1218 | bfd *b; |
1219 | /* Search all input files for a reference to SYMBOL. */ | |
c72f2fb2 | 1220 | for (b = info->input_bfds; b; b = b->link.next) |
4c6d802e | 1221 | if (b != abfd && symbol_warning (warning, symbol, b)) |
1a72702b | 1222 | return; |
4c6d802e | 1223 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 | 1224 | } |
252b5132 RH |
1225 | } |
1226 | ||
1227 | /* This is called by warning_callback for each section. It checks the | |
1228 | relocs of the section to see if it can find a reference to the | |
1229 | symbol which triggered the warning. If it can, it uses the reloc | |
1230 | to give an error message with a file and line number. */ | |
1231 | ||
1232 | static void | |
1579bae1 | 1233 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1234 | { |
1e9cc1c2 | 1235 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1236 | long relsize; |
1237 | arelent **relpp; | |
1238 | long relcount; | |
1239 | arelent **p, **pend; | |
1240 | ||
1241 | if (info->found) | |
1242 | return; | |
1243 | ||
1244 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1245 | if (relsize < 0) | |
1246 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1247 | if (relsize == 0) | |
1248 | return; | |
1249 | ||
1e9cc1c2 | 1250 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1251 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1252 | if (relcount < 0) | |
1253 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1254 | ||
1255 | p = relpp; | |
1256 | pend = p + relcount; | |
1257 | for (; p < pend && *p != NULL; p++) | |
1258 | { | |
1259 | arelent *q = *p; | |
1260 | ||
1261 | if (q->sym_ptr_ptr != NULL | |
1262 | && *q->sym_ptr_ptr != NULL | |
1263 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1264 | { | |
1265 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1266 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1267 | info->warning); | |
b34976b6 | 1268 | info->found = TRUE; |
252b5132 RH |
1269 | break; |
1270 | } | |
1271 | } | |
1272 | ||
1273 | free (relpp); | |
1274 | } | |
1275 | ||
1276 | /* This is called when an undefined symbol is found. */ | |
1277 | ||
1a72702b | 1278 | static void |
0e86e20e | 1279 | undefined_symbol (struct bfd_link_info *info, |
1579bae1 AM |
1280 | const char *name, |
1281 | bfd *abfd, | |
1282 | asection *section, | |
1283 | bfd_vma address, | |
0b28295d | 1284 | bfd_boolean error) |
252b5132 RH |
1285 | { |
1286 | static char *error_name; | |
1287 | static unsigned int error_count; | |
1288 | ||
1289 | #define MAX_ERRORS_IN_A_ROW 5 | |
1290 | ||
0e86e20e AM |
1291 | if (info->ignore_hash != NULL |
1292 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) | |
1a72702b | 1293 | return; |
0e86e20e | 1294 | |
252b5132 RH |
1295 | if (config.warn_once) |
1296 | { | |
252b5132 | 1297 | /* Only warn once about a particular undefined symbol. */ |
0e86e20e | 1298 | add_ignoresym (info, name); |
252b5132 RH |
1299 | } |
1300 | ||
1301 | /* We never print more than a reasonable number of errors in a row | |
1302 | for a single symbol. */ | |
1579bae1 | 1303 | if (error_name != NULL |
252b5132 RH |
1304 | && strcmp (name, error_name) == 0) |
1305 | ++error_count; | |
1306 | else | |
1307 | { | |
1308 | error_count = 0; | |
1579bae1 | 1309 | if (error_name != NULL) |
252b5132 | 1310 | free (error_name); |
d1b2b2dc | 1311 | error_name = xstrdup (name); |
252b5132 RH |
1312 | } |
1313 | ||
1314 | if (section != NULL) | |
1315 | { | |
1316 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1317 | { |
0b28295d ILT |
1318 | if (error) |
1319 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1320 | abfd, section, address, name); | |
1321 | else | |
1322 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1323 | abfd, section, address, name); | |
b6f29aaa | 1324 | } |
252b5132 | 1325 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1326 | { |
1327 | if (error) | |
1328 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1329 | abfd, section, address, name); | |
1330 | else | |
1331 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1332 | abfd, section, address, name); | |
1333 | } | |
1334 | else if (error) | |
1335 | einfo ("%X"); | |
252b5132 RH |
1336 | } |
1337 | else | |
1338 | { | |
1339 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1340 | { |
0b28295d ILT |
1341 | if (error) |
1342 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1343 | abfd, name); | |
1344 | else | |
1345 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1346 | abfd, name); | |
b6f29aaa | 1347 | } |
252b5132 | 1348 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1349 | { |
1350 | if (error) | |
1351 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1352 | abfd, name); | |
1353 | else | |
1354 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1355 | abfd, name); | |
1356 | } | |
1357 | else if (error) | |
1358 | einfo ("%X"); | |
252b5132 | 1359 | } |
252b5132 RH |
1360 | } |
1361 | ||
8aae64e6 AO |
1362 | /* Counter to limit the number of relocation overflow error messages |
1363 | to print. Errors are printed as it is decremented. When it's | |
1364 | called and the counter is zero, a final message is printed | |
1365 | indicating more relocations were omitted. When it gets to -1, no | |
1366 | such errors are printed. If it's initially set to a value less | |
1367 | than -1, all such errors will be printed (--verbose does this). */ | |
1368 | ||
1369 | int overflow_cutoff_limit = 10; | |
1370 | ||
252b5132 RH |
1371 | /* This is called when a reloc overflows. */ |
1372 | ||
1a72702b | 1373 | static void |
0e86e20e | 1374 | reloc_overflow (struct bfd_link_info *info, |
dfeffb9f | 1375 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1376 | const char *name, |
1377 | const char *reloc_name, | |
1378 | bfd_vma addend, | |
1379 | bfd *abfd, | |
1380 | asection *section, | |
1381 | bfd_vma address) | |
252b5132 | 1382 | { |
8aae64e6 | 1383 | if (overflow_cutoff_limit == -1) |
1a72702b | 1384 | return; |
8aae64e6 | 1385 | |
270396f2 | 1386 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1387 | |
1388 | if (overflow_cutoff_limit >= 0 | |
1389 | && overflow_cutoff_limit-- == 0) | |
1390 | { | |
1391 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1a72702b | 1392 | return; |
8aae64e6 AO |
1393 | } |
1394 | ||
dfeffb9f L |
1395 | if (entry) |
1396 | { | |
1397 | while (entry->type == bfd_link_hash_indirect | |
1398 | || entry->type == bfd_link_hash_warning) | |
1399 | entry = entry->u.i.link; | |
1400 | switch (entry->type) | |
1401 | { | |
1402 | case bfd_link_hash_undefined: | |
1403 | case bfd_link_hash_undefweak: | |
0aa7f586 AM |
1404 | einfo (_(" relocation truncated to fit: " |
1405 | "%s against undefined symbol `%T'"), | |
dfeffb9f L |
1406 | reloc_name, entry->root.string); |
1407 | break; | |
1408 | case bfd_link_hash_defined: | |
1409 | case bfd_link_hash_defweak: | |
0aa7f586 AM |
1410 | einfo (_(" relocation truncated to fit: " |
1411 | "%s against symbol `%T' defined in %A section in %B"), | |
dfeffb9f | 1412 | reloc_name, entry->root.string, |
a6e1b90f L |
1413 | entry->u.def.section, |
1414 | entry->u.def.section == bfd_abs_section_ptr | |
0e86e20e | 1415 | ? info->output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1416 | break; |
1417 | default: | |
1418 | abort (); | |
1419 | break; | |
1420 | } | |
1421 | } | |
1422 | else | |
1423 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1424 | reloc_name, name); | |
252b5132 RH |
1425 | if (addend != 0) |
1426 | einfo ("+%v", addend); | |
1427 | einfo ("\n"); | |
252b5132 RH |
1428 | } |
1429 | ||
1430 | /* This is called when a dangerous relocation is made. */ | |
1431 | ||
1a72702b | 1432 | static void |
1579bae1 AM |
1433 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1434 | const char *message, | |
1435 | bfd *abfd, | |
1436 | asection *section, | |
1437 | bfd_vma address) | |
252b5132 | 1438 | { |
270396f2 | 1439 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1440 | abfd, section, address, message); |
252b5132 RH |
1441 | } |
1442 | ||
1443 | /* This is called when a reloc is being generated attached to a symbol | |
1444 | that is not being output. */ | |
1445 | ||
1a72702b | 1446 | static void |
1579bae1 AM |
1447 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1448 | const char *name, | |
1449 | bfd *abfd, | |
1450 | asection *section, | |
1451 | bfd_vma address) | |
252b5132 | 1452 | { |
270396f2 | 1453 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1454 | abfd, section, address, name); |
252b5132 RH |
1455 | } |
1456 | ||
1457 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1458 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1459 | using the -y option, while notice_all is set if the --cref option |
1460 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1461 | linker script; and if plugins are active, since they need to monitor | |
1462 | all references from non-IR files. */ | |
252b5132 | 1463 | |
b34976b6 | 1464 | static bfd_boolean |
1579bae1 | 1465 | notice (struct bfd_link_info *info, |
35ed3f94 | 1466 | struct bfd_link_hash_entry *h, |
46135103 | 1467 | struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, |
1579bae1 AM |
1468 | bfd *abfd, |
1469 | asection *section, | |
16d96b5b | 1470 | bfd_vma value, |
46135103 | 1471 | flagword flags ATTRIBUTE_UNUSED) |
252b5132 | 1472 | { |
35ed3f94 AM |
1473 | const char *name; |
1474 | ||
1475 | if (h == NULL) | |
5061a885 AM |
1476 | { |
1477 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1478 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1479 | return TRUE; |
1480 | } | |
1481 | ||
35ed3f94 | 1482 | name = h->root.string; |
5d3236ee | 1483 | if (info->notice_hash != NULL |
9e2278f5 | 1484 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1485 | { |
1486 | if (bfd_is_und_section (section)) | |
1487 | einfo ("%B: reference to %s\n", abfd, name); | |
1488 | else | |
1489 | einfo ("%B: definition of %s\n", abfd, name); | |
1490 | } | |
1491 | ||
1492 | if (command_line.cref || nocrossref_list != NULL) | |
1493 | add_cref (name, abfd, section, value); | |
1494 | ||
b34976b6 | 1495 | return TRUE; |
252b5132 | 1496 | } |