Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
b90efa5b | 2 | Copyright (C) 1991-2015 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 NC |
78 | /* The canonical representation of ld_sysroot. */ |
79 | char * ld_canon_sysroot; | |
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 **); |
0125cdf2 | 110 | static bfd_boolean multiple_definition |
24f58f47 | 111 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 112 | bfd *, asection *, bfd_vma); |
0125cdf2 | 113 | static bfd_boolean multiple_common |
24f58f47 AM |
114 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
115 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 116 | static bfd_boolean 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); | |
0125cdf2 | 119 | static bfd_boolean constructor_callback |
1579bae1 AM |
120 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
121 | asection *, bfd_vma); | |
0125cdf2 | 122 | static bfd_boolean 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 *); |
0125cdf2 | 127 | static bfd_boolean undefined_symbol |
1579bae1 AM |
128 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
129 | bfd_boolean); | |
0125cdf2 | 130 | static bfd_boolean 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); | |
0125cdf2 | 133 | static bfd_boolean reloc_dangerous |
1579bae1 | 134 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 135 | static bfd_boolean 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 HPN |
160 | static bfd_assert_handler_type default_bfd_assert_handler; |
161 | ||
252b5132 RH |
162 | struct bfd_link_info link_info; |
163 | \f | |
164 | static void | |
498cd2a0 | 165 | ld_cleanup (void) |
252b5132 | 166 | { |
498cd2a0 AM |
167 | bfd_cache_close_all (); |
168 | #ifdef ENABLE_PLUGINS | |
169 | plugin_call_cleanup (); | |
170 | #endif | |
171 | if (output_filename && delete_output_file_on_failure) | |
172 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
173 | } |
174 | ||
3b66a141 HPN |
175 | /* If there's a BFD assertion, we'll notice and exit with an error |
176 | unless otherwise instructed. */ | |
177 | ||
178 | static void | |
179 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, | |
180 | const char *file, int line) | |
181 | { | |
182 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); | |
183 | config.make_executable = FALSE; | |
184 | } | |
185 | ||
252b5132 | 186 | int |
1579bae1 | 187 | main (int argc, char **argv) |
252b5132 RH |
188 | { |
189 | char *emulation; | |
190 | long start_time = get_run_time (); | |
24a09713 SB |
191 | #ifdef HAVE_SBRK |
192 | char *start_sbrk = (char *) sbrk (0); | |
193 | #endif | |
252b5132 RH |
194 | |
195 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
196 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
197 | #endif |
198 | #if defined (HAVE_SETLOCALE) | |
199 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
200 | #endif |
201 | bindtextdomain (PACKAGE, LOCALEDIR); | |
202 | textdomain (PACKAGE); | |
203 | ||
204 | program_name = argv[0]; | |
205 | xmalloc_set_program_name (program_name); | |
206 | ||
207 | START_PROGRESS (program_name, 0); | |
208 | ||
869b9d07 MM |
209 | expandargv (&argc, &argv); |
210 | ||
252b5132 RH |
211 | bfd_init (); |
212 | ||
213 | bfd_set_error_program_name (program_name); | |
214 | ||
3b66a141 HPN |
215 | /* We want to notice and fail on those nasty BFD assertions which are |
216 | likely to signal incorrect output being generated but otherwise may | |
217 | leave no trace. */ | |
218 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); | |
219 | ||
498cd2a0 | 220 | xatexit (ld_cleanup); |
252b5132 | 221 | |
e2243057 RS |
222 | /* Set up the sysroot directory. */ |
223 | ld_sysroot = get_sysroot (argc, argv); | |
224 | if (*ld_sysroot) | |
3074964f | 225 | ld_canon_sysroot = lrealpath (ld_sysroot); |
3fe38064 NC |
226 | if (ld_canon_sysroot) |
227 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
228 | else | |
229 | ld_canon_sysroot_len = -1; | |
230 | ||
252b5132 RH |
231 | /* Set the default BFD target based on the configured target. Doing |
232 | this permits the linker to be configured for a particular target, | |
233 | and linked against a shared BFD library which was configured for | |
234 | a different target. The macro TARGET is defined by Makefile. */ | |
235 | if (! bfd_set_default_target (TARGET)) | |
236 | { | |
237 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
238 | xexit (1); | |
239 | } | |
240 | ||
b47c4208 AM |
241 | #if YYDEBUG |
242 | { | |
243 | extern int yydebug; | |
244 | yydebug = 1; | |
245 | } | |
246 | #endif | |
247 | ||
b34976b6 | 248 | config.build_constructors = TRUE; |
c76308d2 | 249 | config.rpath_separator = ':'; |
a854a4a7 AM |
250 | config.split_by_reloc = (unsigned) -1; |
251 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
252 | config.make_executable = TRUE; |
253 | config.magic_demand_paged = TRUE; | |
254 | config.text_read_only = TRUE; | |
4f9d22a0 | 255 | link_info.disable_target_specific_optimizations = -1; |
3b95049e | 256 | |
b34976b6 | 257 | command_line.warn_mismatch = TRUE; |
fe7929ce | 258 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 259 | command_line.check_section_addresses = -1; |
bcaa7b3e | 260 | |
252b5132 RH |
261 | /* We initialize DEMANGLING based on the environment variable |
262 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
263 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
264 | environment. Acting the same way here lets us provide the same | |
265 | interface by default. */ | |
266 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
267 | ||
b34976b6 | 268 | link_info.allow_undefined_version = TRUE; |
b5067602 | 269 | link_info.keep_memory = TRUE; |
b5067602 | 270 | link_info.combreloc = TRUE; |
d5cd3933 | 271 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 272 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
273 | link_info.callbacks = &link_callbacks; |
274 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
275 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
276 | and _fini symbols. We are compatible. */ | |
277 | link_info.init_function = "_init"; | |
278 | link_info.fini_function = "_fini"; | |
a9a4c53e | 279 | link_info.relax_pass = 1; |
889c2a67 | 280 | link_info.extern_protected_data = -1; |
e0076ab3 | 281 | link_info.pei386_auto_import = -1; |
db6751f2 | 282 | link_info.spare_dynamic_tags = 5; |
967928e9 | 283 | link_info.path_separator = ':'; |
24718e3b | 284 | |
252b5132 | 285 | ldfile_add_arch (""); |
252b5132 RH |
286 | emulation = get_emulation (argc, argv); |
287 | ldemul_choose_mode (emulation); | |
742aeb63 | 288 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
289 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
290 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 | 291 | lang_init (); |
18d6a79d | 292 | ldexp_init (); |
252b5132 | 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 | ||
9bbc1a67 AM |
300 | #ifdef ENABLE_PLUGINS |
301 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
d82184d7 | 302 | plugin_load_plugins (); |
9bbc1a67 | 303 | #endif /* ENABLE_PLUGINS */ |
36af4a4e | 304 | |
9bbc1a67 | 305 | ldemul_set_symbols (); |
252b5132 | 306 | |
14be8564 L |
307 | /* If we have not already opened and parsed a linker script, |
308 | try the default script from command line first. */ | |
309 | if (saved_script_handle == NULL | |
310 | && command_line.default_script != NULL) | |
311 | { | |
312 | ldfile_open_command_file (command_line.default_script); | |
313 | parser_input = input_script; | |
314 | yyparse (); | |
315 | } | |
316 | ||
b9a8de1e NC |
317 | /* If we have not already opened and parsed a linker script |
318 | read the emulation's appropriate default script. */ | |
b90e1c6f | 319 | if (saved_script_handle == NULL) |
252b5132 | 320 | { |
252b5132 | 321 | int isfile; |
b7a26f91 | 322 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
323 | |
324 | if (isfile) | |
7d24f02c | 325 | ldfile_open_default_command_file (s); |
252b5132 | 326 | else |
b7a26f91 | 327 | { |
252b5132 | 328 | lex_string = s; |
dab69f68 | 329 | lex_redirect (s, _("built in linker script"), 1); |
252b5132 RH |
330 | } |
331 | parser_input = input_script; | |
332 | yyparse (); | |
333 | lex_string = NULL; | |
334 | } | |
335 | ||
cd6f1cf3 | 336 | if (verbose) |
b9a8de1e | 337 | { |
9cb61eab AM |
338 | if (saved_script_handle) |
339 | info_msg (_("using external linker script:")); | |
340 | else | |
341 | info_msg (_("using internal linker script:")); | |
342 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
343 | |
344 | if (saved_script_handle) | |
345 | { | |
74699268 | 346 | static const int ld_bufsz = 8193; |
b9a8de1e | 347 | size_t n; |
1e9cc1c2 | 348 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
349 | |
350 | rewind (saved_script_handle); | |
74699268 | 351 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 352 | { |
b7a26f91 | 353 | buf[n] = 0; |
b9a8de1e NC |
354 | info_msg (buf); |
355 | } | |
356 | rewind (saved_script_handle); | |
357 | free (buf); | |
358 | } | |
359 | else | |
360 | { | |
361 | int isfile; | |
362 | ||
b7a26f91 | 363 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 364 | } |
b7a26f91 | 365 | |
b9a8de1e NC |
366 | info_msg ("\n==================================================\n"); |
367 | } | |
368 | ||
30824704 RM |
369 | if (command_line.print_output_format) |
370 | info_msg ("%s\n", lang_get_output_target ()); | |
371 | ||
252b5132 RH |
372 | lang_final (); |
373 | ||
61e2488c JT |
374 | /* If the only command line argument has been -v or --version or --verbose |
375 | then ignore any input files provided by linker scripts and exit now. | |
376 | We do not want to create an output file when the linker is just invoked | |
377 | to provide version information. */ | |
378 | if (argc == 2 && version_printed) | |
379 | xexit (0); | |
380 | ||
b34976b6 | 381 | if (!lang_has_input_file) |
252b5132 | 382 | { |
30824704 | 383 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
384 | xexit (0); |
385 | einfo (_("%P%F: no input files\n")); | |
386 | } | |
387 | ||
388 | if (trace_files) | |
0125cdf2 | 389 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
390 | |
391 | ldemul_after_parse (); | |
392 | ||
252b5132 RH |
393 | if (config.map_filename) |
394 | { | |
395 | if (strcmp (config.map_filename, "-") == 0) | |
396 | { | |
397 | config.map_file = stdout; | |
398 | } | |
399 | else | |
400 | { | |
401 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
402 | if (config.map_file == (FILE *) NULL) | |
403 | { | |
404 | bfd_set_error (bfd_error_system_call); | |
405 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
406 | config.map_filename); | |
407 | } | |
408 | } | |
409 | } | |
410 | ||
252b5132 RH |
411 | lang_process (); |
412 | ||
413 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 414 | symbols, and possibly multiple definitions. */ |
0e1862bb | 415 | if (bfd_link_relocatable (&link_info)) |
f13a99db | 416 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 417 | else |
f13a99db | 418 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 | 419 | |
0ce398f1 L |
420 | if ((link_info.compress_debug & COMPRESS_DEBUG)) |
421 | { | |
422 | link_info.output_bfd->flags |= BFD_COMPRESS; | |
423 | if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
424 | link_info.output_bfd->flags |= BFD_COMPRESS_GABI; | |
425 | } | |
426 | ||
252b5132 RH |
427 | ldwrite (); |
428 | ||
429 | if (config.map_file != NULL) | |
430 | lang_map (); | |
431 | if (command_line.cref) | |
432 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
433 | if (nocrossref_list != NULL) | |
434 | check_nocrossrefs (); | |
3604cb1f TG |
435 | if (command_line.print_memory_usage) |
436 | lang_print_memory_usage (); | |
edf84efc NC |
437 | #if 0 |
438 | { | |
439 | struct bfd_link_hash_entry * h; | |
252b5132 | 440 | |
edf84efc NC |
441 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
442 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); | |
443 | } | |
444 | #endif | |
18d6a79d | 445 | ldexp_finish (); |
750877ba L |
446 | lang_finish (); |
447 | ||
1049f94e | 448 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 449 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 450 | want to ignore for relocatable output?) */ |
b34976b6 | 451 | if (!config.make_executable && !force_make_executable) |
252b5132 | 452 | { |
b34976b6 | 453 | if (trace_files) |
0125cdf2 NC |
454 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
455 | output_filename); | |
252b5132 | 456 | |
4309cbf2 | 457 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
458 | xexit (1); |
459 | } | |
460 | else | |
461 | { | |
f13a99db AM |
462 | if (! bfd_close (link_info.output_bfd)) |
463 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
464 | |
465 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
466 | executable file and it doesn't end in .exe, copy it to one |
467 | which does. */ | |
0e1862bb L |
468 | if (!bfd_link_relocatable (&link_info) |
469 | && command_line.force_exe_suffix) | |
252b5132 RH |
470 | { |
471 | int len = strlen (output_filename); | |
0125cdf2 | 472 | |
6d5e62f8 | 473 | if (len < 4 |
252b5132 RH |
474 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
475 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
476 | { | |
477 | FILE *src; | |
478 | FILE *dst; | |
479 | const int bsize = 4096; | |
1e9cc1c2 | 480 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 481 | int l; |
1e9cc1c2 | 482 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 483 | |
252b5132 RH |
484 | strcpy (dst_name, output_filename); |
485 | strcat (dst_name, ".exe"); | |
486 | src = fopen (output_filename, FOPEN_RB); | |
487 | dst = fopen (dst_name, FOPEN_WB); | |
488 | ||
489 | if (!src) | |
b3862264 | 490 | einfo (_("%P%F: unable to open for source of copy `%s'\n"), |
1579bae1 | 491 | output_filename); |
252b5132 | 492 | if (!dst) |
b3862264 | 493 | einfo (_("%P%F: unable to open for destination of copy `%s'\n"), |
1579bae1 | 494 | dst_name); |
252b5132 RH |
495 | while ((l = fread (buf, 1, bsize, src)) > 0) |
496 | { | |
497 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 498 | |
252b5132 | 499 | if (done != l) |
0125cdf2 | 500 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 501 | } |
0125cdf2 | 502 | |
252b5132 RH |
503 | fclose (src); |
504 | if (fclose (dst) == EOF) | |
0125cdf2 | 505 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
506 | free (dst_name); |
507 | free (buf); | |
508 | } | |
509 | } | |
510 | } | |
511 | ||
512 | END_PROGRESS (program_name); | |
513 | ||
514 | if (config.stats) | |
515 | { | |
516 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 517 | char *lim = (char *) sbrk (0); |
252b5132 RH |
518 | #endif |
519 | long run_time = get_run_time () - start_time; | |
520 | ||
e922bcab | 521 | fflush (stdout); |
252b5132 RH |
522 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
523 | program_name, run_time / 1000000, run_time % 1000000); | |
524 | #ifdef HAVE_SBRK | |
525 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
24a09713 | 526 | (long) (lim - start_sbrk)); |
252b5132 | 527 | #endif |
e922bcab | 528 | fflush (stderr); |
252b5132 RH |
529 | } |
530 | ||
4309cbf2 | 531 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
532 | output_filename = NULL; |
533 | ||
534 | xexit (0); | |
535 | return 0; | |
536 | } | |
537 | ||
e2243057 RS |
538 | /* If the configured sysroot is relocatable, try relocating it based on |
539 | default prefix FROM. Return the relocated directory if it exists, | |
540 | otherwise return null. */ | |
541 | ||
542 | static char * | |
543 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
544 | { | |
545 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
546 | char *path; | |
547 | struct stat s; | |
548 | ||
549 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
550 | if (path) | |
551 | { | |
552 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
553 | return path; | |
554 | free (path); | |
555 | } | |
556 | #endif | |
557 | return 0; | |
558 | } | |
559 | ||
560 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
561 | ||
562 | static const char * | |
563 | get_sysroot (int argc, char **argv) | |
564 | { | |
565 | int i; | |
566 | const char *path; | |
567 | ||
568 | for (i = 1; i < argc; i++) | |
0112cd26 | 569 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
570 | return argv[i] + strlen ("--sysroot="); |
571 | ||
572 | path = get_relative_sysroot (BINDIR); | |
573 | if (path) | |
574 | return path; | |
575 | ||
576 | path = get_relative_sysroot (TOOLBINDIR); | |
577 | if (path) | |
578 | return path; | |
579 | ||
580 | return TARGET_SYSTEM_ROOT; | |
581 | } | |
582 | ||
252b5132 RH |
583 | /* We need to find any explicitly given emulation in order to initialize the |
584 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
585 | ||
586 | static char * | |
1579bae1 | 587 | get_emulation (int argc, char **argv) |
252b5132 RH |
588 | { |
589 | char *emulation; | |
590 | int i; | |
591 | ||
592 | emulation = getenv (EMULATION_ENVIRON); | |
593 | if (emulation == NULL) | |
594 | emulation = DEFAULT_EMULATION; | |
595 | ||
596 | for (i = 1; i < argc; i++) | |
597 | { | |
0112cd26 | 598 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
599 | { |
600 | if (argv[i][2] == '\0') | |
601 | { | |
602 | /* -m EMUL */ | |
603 | if (i < argc - 1) | |
604 | { | |
605 | emulation = argv[i + 1]; | |
606 | i++; | |
607 | } | |
608 | else | |
0125cdf2 | 609 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
610 | } |
611 | else if (strcmp (argv[i], "-mips1") == 0 | |
612 | || strcmp (argv[i], "-mips2") == 0 | |
613 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 614 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
615 | || strcmp (argv[i], "-mips5") == 0 |
616 | || strcmp (argv[i], "-mips32") == 0 | |
617 | || strcmp (argv[i], "-mips32r2") == 0 | |
7361da2c | 618 | || strcmp (argv[i], "-mips32r6") == 0 |
5f74bc13 | 619 | || strcmp (argv[i], "-mips64") == 0 |
7361da2c AB |
620 | || strcmp (argv[i], "-mips64r2") == 0 |
621 | || strcmp (argv[i], "-mips64r6") == 0) | |
252b5132 | 622 | { |
31d677f9 | 623 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
624 | passed to the linker by some MIPS compilers. They |
625 | generally tell the linker to use a slightly different | |
626 | library path. Perhaps someday these should be | |
627 | implemented as emulations; until then, we just ignore | |
628 | the arguments and hope that nobody ever creates | |
629 | emulations named ips1, ips2 or ips3. */ | |
630 | } | |
631 | else if (strcmp (argv[i], "-m486") == 0) | |
632 | { | |
633 | /* FIXME: The argument -m486 is passed to the linker on | |
634 | some Linux systems. Hope that nobody creates an | |
635 | emulation named 486. */ | |
636 | } | |
637 | else | |
638 | { | |
639 | /* -mEMUL */ | |
640 | emulation = &argv[i][2]; | |
641 | } | |
642 | } | |
643 | } | |
644 | ||
645 | return emulation; | |
646 | } | |
647 | ||
252b5132 | 648 | void |
1579bae1 | 649 | add_ysym (const char *name) |
252b5132 | 650 | { |
1579bae1 | 651 | if (link_info.notice_hash == NULL) |
252b5132 | 652 | { |
1e9cc1c2 NC |
653 | link_info.notice_hash = |
654 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
655 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
656 | bfd_hash_newfunc, | |
657 | sizeof (struct bfd_hash_entry), | |
658 | 61)) | |
252b5132 | 659 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 660 | } |
252b5132 | 661 | |
1579bae1 | 662 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
663 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
664 | } | |
665 | ||
0e86e20e AM |
666 | void |
667 | add_ignoresym (struct bfd_link_info *info, const char *name) | |
668 | { | |
669 | if (info->ignore_hash == NULL) | |
670 | { | |
671 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); | |
672 | if (! bfd_hash_table_init_n (info->ignore_hash, | |
673 | bfd_hash_newfunc, | |
674 | sizeof (struct bfd_hash_entry), | |
675 | 61)) | |
676 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
677 | } | |
678 | ||
679 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) | |
680 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
681 | } | |
682 | ||
252b5132 RH |
683 | /* Record a symbol to be wrapped, from the --wrap option. */ |
684 | ||
685 | void | |
1579bae1 | 686 | add_wrap (const char *name) |
252b5132 RH |
687 | { |
688 | if (link_info.wrap_hash == NULL) | |
689 | { | |
1e9cc1c2 NC |
690 | link_info.wrap_hash = |
691 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
692 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
693 | bfd_hash_newfunc, | |
694 | sizeof (struct bfd_hash_entry), | |
695 | 61)) | |
252b5132 RH |
696 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
697 | } | |
0125cdf2 | 698 | |
b34976b6 | 699 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
700 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
701 | } | |
702 | ||
703 | /* Handle the -retain-symbols-file option. */ | |
704 | ||
705 | void | |
1579bae1 | 706 | add_keepsyms_file (const char *filename) |
252b5132 RH |
707 | { |
708 | FILE *file; | |
709 | char *buf; | |
710 | size_t bufsize; | |
711 | int c; | |
712 | ||
713 | if (link_info.strip == strip_some) | |
714 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
715 | ||
716 | file = fopen (filename, "r"); | |
1579bae1 | 717 | if (file == NULL) |
252b5132 RH |
718 | { |
719 | bfd_set_error (bfd_error_system_call); | |
720 | einfo ("%X%P: %s: %E\n", filename); | |
721 | return; | |
722 | } | |
723 | ||
1e9cc1c2 NC |
724 | link_info.keep_hash = (struct bfd_hash_table *) |
725 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
726 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
727 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
728 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
729 | ||
730 | bufsize = 100; | |
1e9cc1c2 | 731 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
732 | |
733 | c = getc (file); | |
734 | while (c != EOF) | |
735 | { | |
3882b010 | 736 | while (ISSPACE (c)) |
252b5132 RH |
737 | c = getc (file); |
738 | ||
739 | if (c != EOF) | |
740 | { | |
741 | size_t len = 0; | |
742 | ||
3882b010 | 743 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
744 | { |
745 | buf[len] = c; | |
746 | ++len; | |
747 | if (len >= bufsize) | |
748 | { | |
749 | bufsize *= 2; | |
1e9cc1c2 | 750 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
751 | } |
752 | c = getc (file); | |
753 | } | |
754 | ||
755 | buf[len] = '\0'; | |
756 | ||
1579bae1 | 757 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
758 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
759 | } | |
760 | } | |
761 | ||
762 | if (link_info.strip != strip_none) | |
763 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
764 | ||
5ed6aba4 | 765 | free (buf); |
252b5132 | 766 | link_info.strip = strip_some; |
d9313f4f | 767 | fclose (file); |
252b5132 RH |
768 | } |
769 | \f | |
770 | /* Callbacks from the BFD linker routines. */ | |
771 | ||
772 | /* This is called when BFD has decided to include an archive member in | |
773 | a link. */ | |
774 | ||
b34976b6 | 775 | static bfd_boolean |
e1fffbe6 | 776 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 777 | bfd *abfd, |
5d3236ee DK |
778 | const char *name, |
779 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
780 | { |
781 | lang_input_statement_type *input; | |
5d3236ee | 782 | lang_input_statement_type orig_input; |
252b5132 | 783 | |
1e9cc1c2 NC |
784 | input = (lang_input_statement_type *) |
785 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
786 | input->filename = abfd->filename; |
787 | input->local_sym_name = abfd->filename; | |
788 | input->the_bfd = abfd; | |
252b5132 | 789 | |
5d3236ee DK |
790 | /* Save the original data for trace files/tries below, as plugins |
791 | (if enabled) may possibly alter it to point to a replacement | |
792 | BFD, but we still want to output the original BFD filename. */ | |
793 | orig_input = *input; | |
794 | #ifdef ENABLE_PLUGINS | |
716db898 | 795 | if (link_info.lto_plugin_active && !no_more_claiming) |
5d3236ee DK |
796 | { |
797 | /* We must offer this archive member to the plugins to claim. */ | |
35a1e5f3 L |
798 | plugin_maybe_claim (input); |
799 | if (input->flags.claimed) | |
5d3236ee | 800 | { |
35a1e5f3 L |
801 | input->flags.claim_archive = TRUE; |
802 | *subsbfd = input->the_bfd; | |
5d3236ee DK |
803 | } |
804 | } | |
805 | #endif /* ENABLE_PLUGINS */ | |
806 | ||
252b5132 RH |
807 | ldlang_add_file (input); |
808 | ||
1579bae1 | 809 | if (config.map_file != NULL) |
252b5132 | 810 | { |
b34976b6 | 811 | static bfd_boolean header_printed; |
252b5132 RH |
812 | struct bfd_link_hash_entry *h; |
813 | bfd *from; | |
814 | int len; | |
815 | ||
e1fffbe6 | 816 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
817 | |
818 | if (h == NULL) | |
819 | from = NULL; | |
820 | else | |
821 | { | |
822 | switch (h->type) | |
823 | { | |
824 | default: | |
825 | from = NULL; | |
826 | break; | |
827 | ||
828 | case bfd_link_hash_defined: | |
829 | case bfd_link_hash_defweak: | |
830 | from = h->u.def.section->owner; | |
831 | break; | |
832 | ||
833 | case bfd_link_hash_undefined: | |
834 | case bfd_link_hash_undefweak: | |
835 | from = h->u.undef.abfd; | |
836 | break; | |
837 | ||
838 | case bfd_link_hash_common: | |
839 | from = h->u.c.p->section->owner; | |
840 | break; | |
841 | } | |
842 | } | |
843 | ||
844 | if (! header_printed) | |
845 | { | |
846 | char buf[100]; | |
847 | ||
16e4ecc0 AM |
848 | sprintf (buf, _("Archive member included " |
849 | "to satisfy reference by file (symbol)\n\n")); | |
252b5132 | 850 | minfo ("%s", buf); |
b34976b6 | 851 | header_printed = TRUE; |
252b5132 RH |
852 | } |
853 | ||
854 | if (bfd_my_archive (abfd) == NULL) | |
855 | { | |
856 | minfo ("%s", bfd_get_filename (abfd)); | |
857 | len = strlen (bfd_get_filename (abfd)); | |
858 | } | |
859 | else | |
860 | { | |
861 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
862 | bfd_get_filename (abfd)); | |
863 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
864 | + strlen (bfd_get_filename (abfd)) | |
865 | + 2); | |
866 | } | |
867 | ||
868 | if (len >= 29) | |
869 | { | |
870 | print_nl (); | |
871 | len = 0; | |
872 | } | |
873 | while (len < 30) | |
874 | { | |
875 | print_space (); | |
876 | ++len; | |
877 | } | |
878 | ||
879 | if (from != NULL) | |
880 | minfo ("%B ", from); | |
881 | if (h != NULL) | |
882 | minfo ("(%T)\n", h->root.string); | |
883 | else | |
884 | minfo ("(%s)\n", name); | |
885 | } | |
886 | ||
cd6f1cf3 | 887 | if (trace_files || verbose) |
5d3236ee | 888 | info_msg ("%I\n", &orig_input); |
b34976b6 | 889 | return TRUE; |
252b5132 RH |
890 | } |
891 | ||
892 | /* This is called when BFD has discovered a symbol which is defined | |
893 | multiple times. */ | |
894 | ||
b34976b6 | 895 | static bfd_boolean |
24f58f47 AM |
896 | multiple_definition (struct bfd_link_info *info, |
897 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
898 | bfd *nbfd, |
899 | asection *nsec, | |
900 | bfd_vma nval) | |
252b5132 | 901 | { |
24f58f47 AM |
902 | const char *name; |
903 | bfd *obfd; | |
904 | asection *osec; | |
905 | bfd_vma oval; | |
906 | ||
907 | if (info->allow_multiple_definition) | |
908 | return TRUE; | |
909 | ||
910 | switch (h->type) | |
911 | { | |
912 | case bfd_link_hash_defined: | |
913 | osec = h->u.def.section; | |
914 | oval = h->u.def.value; | |
915 | obfd = h->u.def.section->owner; | |
916 | break; | |
917 | case bfd_link_hash_indirect: | |
918 | osec = bfd_ind_section_ptr; | |
919 | oval = 0; | |
920 | obfd = NULL; | |
921 | break; | |
922 | default: | |
923 | abort (); | |
924 | } | |
925 | ||
926 | /* Ignore a redefinition of an absolute symbol to the | |
927 | same value; it's harmless. */ | |
928 | if (h->type == bfd_link_hash_defined | |
929 | && bfd_is_abs_section (osec) | |
930 | && bfd_is_abs_section (nsec) | |
931 | && nval == oval) | |
932 | return TRUE; | |
933 | ||
252b5132 RH |
934 | /* If either section has the output_section field set to |
935 | bfd_abs_section_ptr, it means that the section is being | |
936 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
937 | FIXME: It would be cleaner to somehow ignore symbols defined in |
938 | sections which are being discarded. */ | |
252b5132 RH |
939 | if ((osec->output_section != NULL |
940 | && ! bfd_is_abs_section (osec) | |
941 | && bfd_is_abs_section (osec->output_section)) | |
942 | || (nsec->output_section != NULL | |
943 | && ! bfd_is_abs_section (nsec) | |
944 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 945 | return TRUE; |
252b5132 | 946 | |
24f58f47 AM |
947 | name = h->root.string; |
948 | if (nbfd == NULL) | |
949 | { | |
950 | nbfd = obfd; | |
951 | nsec = osec; | |
952 | nval = oval; | |
953 | obfd = NULL; | |
954 | } | |
252b5132 RH |
955 | einfo (_("%X%C: multiple definition of `%T'\n"), |
956 | nbfd, nsec, nval, name); | |
1579bae1 | 957 | if (obfd != NULL) |
252b5132 | 958 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 959 | |
13761a11 | 960 | if (RELAXATION_ENABLED_BY_USER) |
9b14b192 NC |
961 | { |
962 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
13761a11 | 963 | DISABLE_RELAXATION; |
9b14b192 | 964 | } |
6d5e62f8 | 965 | |
b34976b6 | 966 | return TRUE; |
252b5132 RH |
967 | } |
968 | ||
969 | /* This is called when there is a definition of a common symbol, or | |
970 | when a common symbol is found for a symbol that is already defined, | |
971 | or when two common symbols are found. We only do something if | |
972 | -warn-common was used. */ | |
973 | ||
b34976b6 | 974 | static bfd_boolean |
1579bae1 | 975 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 976 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
977 | bfd *nbfd, |
978 | enum bfd_link_hash_type ntype, | |
979 | bfd_vma nsize) | |
252b5132 | 980 | { |
24f58f47 AM |
981 | const char *name; |
982 | bfd *obfd; | |
983 | enum bfd_link_hash_type otype; | |
984 | bfd_vma osize; | |
985 | ||
986 | if (!config.warn_common) | |
b34976b6 | 987 | return TRUE; |
252b5132 | 988 | |
24f58f47 AM |
989 | name = h->root.string; |
990 | otype = h->type; | |
991 | if (otype == bfd_link_hash_common) | |
992 | { | |
993 | obfd = h->u.c.p->section->owner; | |
994 | osize = h->u.c.size; | |
995 | } | |
996 | else if (otype == bfd_link_hash_defined | |
997 | || otype == bfd_link_hash_defweak) | |
998 | { | |
999 | obfd = h->u.def.section->owner; | |
1000 | osize = 0; | |
1001 | } | |
1002 | else | |
1003 | { | |
1004 | /* FIXME: It would nice if we could report the BFD which defined | |
1005 | an indirect symbol, but we don't have anywhere to store the | |
1006 | information. */ | |
1007 | obfd = NULL; | |
1008 | osize = 0; | |
1009 | } | |
1010 | ||
252b5132 RH |
1011 | if (ntype == bfd_link_hash_defined |
1012 | || ntype == bfd_link_hash_defweak | |
1013 | || ntype == bfd_link_hash_indirect) | |
1014 | { | |
1015 | ASSERT (otype == bfd_link_hash_common); | |
1016 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1017 | nbfd, name); | |
1018 | if (obfd != NULL) | |
1019 | einfo (_("%B: warning: common is here\n"), obfd); | |
1020 | } | |
1021 | else if (otype == bfd_link_hash_defined | |
1022 | || otype == bfd_link_hash_defweak | |
1023 | || otype == bfd_link_hash_indirect) | |
1024 | { | |
1025 | ASSERT (ntype == bfd_link_hash_common); | |
1026 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1027 | nbfd, name); | |
1028 | if (obfd != NULL) | |
1029 | einfo (_("%B: warning: defined here\n"), obfd); | |
1030 | } | |
1031 | else | |
1032 | { | |
1033 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1034 | if (osize > nsize) | |
1035 | { | |
1036 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1037 | nbfd, name); | |
1038 | if (obfd != NULL) | |
1039 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1040 | } | |
1041 | else if (nsize > osize) | |
1042 | { | |
1043 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1044 | nbfd, name); | |
1045 | if (obfd != NULL) | |
1046 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1051 | if (obfd != NULL) | |
1052 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1053 | } | |
1054 | } | |
1055 | ||
b34976b6 | 1056 | return TRUE; |
252b5132 RH |
1057 | } |
1058 | ||
1059 | /* This is called when BFD has discovered a set element. H is the | |
1060 | entry in the linker hash table for the set. SECTION and VALUE | |
1061 | represent a value which should be added to the set. */ | |
1062 | ||
b34976b6 | 1063 | static bfd_boolean |
1579bae1 AM |
1064 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1065 | struct bfd_link_hash_entry *h, | |
1066 | bfd_reloc_code_real_type reloc, | |
1067 | bfd *abfd, | |
1068 | asection *section, | |
1069 | bfd_vma value) | |
252b5132 RH |
1070 | { |
1071 | if (config.warn_constructors) | |
1072 | einfo (_("%P: warning: global constructor %s used\n"), | |
1073 | h->root.string); | |
1074 | ||
1075 | if (! config.build_constructors) | |
b34976b6 | 1076 | return TRUE; |
252b5132 | 1077 | |
1579bae1 | 1078 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1079 | |
1080 | if (h->type == bfd_link_hash_new) | |
1081 | { | |
1082 | h->type = bfd_link_hash_undefined; | |
1083 | h->u.undef.abfd = abfd; | |
1084 | /* We don't call bfd_link_add_undef to add this to the list of | |
1085 | undefined symbols because we are going to define it | |
1086 | ourselves. */ | |
1087 | } | |
1088 | ||
b34976b6 | 1089 | return TRUE; |
252b5132 RH |
1090 | } |
1091 | ||
1092 | /* This is called when BFD has discovered a constructor. This is only | |
1093 | called for some object file formats--those which do not handle | |
1094 | constructors in some more clever fashion. This is similar to | |
1095 | adding an element to a set, but less general. */ | |
1096 | ||
b34976b6 | 1097 | static bfd_boolean |
1579bae1 AM |
1098 | constructor_callback (struct bfd_link_info *info, |
1099 | bfd_boolean constructor, | |
1100 | const char *name, | |
1101 | bfd *abfd, | |
1102 | asection *section, | |
1103 | bfd_vma value) | |
252b5132 RH |
1104 | { |
1105 | char *s; | |
1106 | struct bfd_link_hash_entry *h; | |
1107 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1108 | ||
1109 | if (config.warn_constructors) | |
1110 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1111 | ||
1112 | if (! config.build_constructors) | |
b34976b6 | 1113 | return TRUE; |
252b5132 RH |
1114 | |
1115 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1116 | useful error message. */ | |
0e86e20e | 1117 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
0e1862bb | 1118 | && (bfd_link_relocatable (info) |
252b5132 RH |
1119 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1120 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1121 | ||
1122 | s = set_name; | |
1123 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1124 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1125 | if (constructor) | |
1126 | strcpy (s, "__CTOR_LIST__"); | |
1127 | else | |
1128 | strcpy (s, "__DTOR_LIST__"); | |
1129 | ||
b34976b6 | 1130 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1131 | if (h == (struct bfd_link_hash_entry *) NULL) |
1132 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1133 | if (h->type == bfd_link_hash_new) | |
1134 | { | |
1135 | h->type = bfd_link_hash_undefined; | |
1136 | h->u.undef.abfd = abfd; | |
1137 | /* We don't call bfd_link_add_undef to add this to the list of | |
1138 | undefined symbols because we are going to define it | |
1139 | ourselves. */ | |
1140 | } | |
1141 | ||
1142 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1143 | return TRUE; |
252b5132 RH |
1144 | } |
1145 | ||
1146 | /* A structure used by warning_callback to pass information through | |
1147 | bfd_map_over_sections. */ | |
1148 | ||
0125cdf2 NC |
1149 | struct warning_callback_info |
1150 | { | |
b34976b6 | 1151 | bfd_boolean found; |
252b5132 RH |
1152 | const char *warning; |
1153 | const char *symbol; | |
1154 | asymbol **asymbols; | |
1155 | }; | |
1156 | ||
4c6d802e L |
1157 | /* Look through the relocs to see if we can find a plausible address |
1158 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ | |
1159 | ||
1160 | static bfd_boolean | |
1161 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) | |
1162 | { | |
1163 | struct warning_callback_info cinfo; | |
1164 | ||
1165 | if (!bfd_generic_link_read_symbols (abfd)) | |
1166 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1167 | ||
1168 | cinfo.found = FALSE; | |
1169 | cinfo.warning = warning; | |
1170 | cinfo.symbol = symbol; | |
1171 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1172 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
1173 | return cinfo.found; | |
1174 | } | |
1175 | ||
252b5132 RH |
1176 | /* This is called when there is a reference to a warning symbol. */ |
1177 | ||
b34976b6 | 1178 | static bfd_boolean |
1579bae1 AM |
1179 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1180 | const char *warning, | |
1181 | const char *symbol, | |
1182 | bfd *abfd, | |
1183 | asection *section, | |
1184 | bfd_vma address) | |
252b5132 RH |
1185 | { |
1186 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1187 | have a cleaner interface, but what? */ | |
1188 | if (! config.warn_multiple_gp | |
1189 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1190 | return TRUE; |
252b5132 RH |
1191 | |
1192 | if (section != NULL) | |
300475fe | 1193 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1194 | else if (abfd == NULL) |
300475fe | 1195 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1196 | else if (symbol == NULL) |
300475fe | 1197 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
4c6d802e | 1198 | else if (! symbol_warning (warning, symbol, abfd)) |
252b5132 | 1199 | { |
4c6d802e L |
1200 | bfd *b; |
1201 | /* Search all input files for a reference to SYMBOL. */ | |
c72f2fb2 | 1202 | for (b = info->input_bfds; b; b = b->link.next) |
4c6d802e L |
1203 | if (b != abfd && symbol_warning (warning, symbol, b)) |
1204 | return TRUE; | |
1205 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); | |
252b5132 RH |
1206 | } |
1207 | ||
b34976b6 | 1208 | return TRUE; |
252b5132 RH |
1209 | } |
1210 | ||
1211 | /* This is called by warning_callback for each section. It checks the | |
1212 | relocs of the section to see if it can find a reference to the | |
1213 | symbol which triggered the warning. If it can, it uses the reloc | |
1214 | to give an error message with a file and line number. */ | |
1215 | ||
1216 | static void | |
1579bae1 | 1217 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1218 | { |
1e9cc1c2 | 1219 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1220 | long relsize; |
1221 | arelent **relpp; | |
1222 | long relcount; | |
1223 | arelent **p, **pend; | |
1224 | ||
1225 | if (info->found) | |
1226 | return; | |
1227 | ||
1228 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1229 | if (relsize < 0) | |
1230 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1231 | if (relsize == 0) | |
1232 | return; | |
1233 | ||
1e9cc1c2 | 1234 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1235 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1236 | if (relcount < 0) | |
1237 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1238 | ||
1239 | p = relpp; | |
1240 | pend = p + relcount; | |
1241 | for (; p < pend && *p != NULL; p++) | |
1242 | { | |
1243 | arelent *q = *p; | |
1244 | ||
1245 | if (q->sym_ptr_ptr != NULL | |
1246 | && *q->sym_ptr_ptr != NULL | |
1247 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1248 | { | |
1249 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1250 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1251 | info->warning); | |
b34976b6 | 1252 | info->found = TRUE; |
252b5132 RH |
1253 | break; |
1254 | } | |
1255 | } | |
1256 | ||
1257 | free (relpp); | |
1258 | } | |
1259 | ||
1260 | /* This is called when an undefined symbol is found. */ | |
1261 | ||
b34976b6 | 1262 | static bfd_boolean |
0e86e20e | 1263 | undefined_symbol (struct bfd_link_info *info, |
1579bae1 AM |
1264 | const char *name, |
1265 | bfd *abfd, | |
1266 | asection *section, | |
1267 | bfd_vma address, | |
0b28295d | 1268 | bfd_boolean error) |
252b5132 RH |
1269 | { |
1270 | static char *error_name; | |
1271 | static unsigned int error_count; | |
1272 | ||
1273 | #define MAX_ERRORS_IN_A_ROW 5 | |
1274 | ||
0e86e20e AM |
1275 | if (info->ignore_hash != NULL |
1276 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) | |
1277 | return TRUE; | |
1278 | ||
252b5132 RH |
1279 | if (config.warn_once) |
1280 | { | |
252b5132 | 1281 | /* Only warn once about a particular undefined symbol. */ |
0e86e20e | 1282 | add_ignoresym (info, name); |
252b5132 RH |
1283 | } |
1284 | ||
1285 | /* We never print more than a reasonable number of errors in a row | |
1286 | for a single symbol. */ | |
1579bae1 | 1287 | if (error_name != NULL |
252b5132 RH |
1288 | && strcmp (name, error_name) == 0) |
1289 | ++error_count; | |
1290 | else | |
1291 | { | |
1292 | error_count = 0; | |
1579bae1 | 1293 | if (error_name != NULL) |
252b5132 | 1294 | free (error_name); |
d1b2b2dc | 1295 | error_name = xstrdup (name); |
252b5132 RH |
1296 | } |
1297 | ||
1298 | if (section != NULL) | |
1299 | { | |
1300 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1301 | { |
0b28295d ILT |
1302 | if (error) |
1303 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1304 | abfd, section, address, name); | |
1305 | else | |
1306 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1307 | abfd, section, address, name); | |
b6f29aaa | 1308 | } |
252b5132 | 1309 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1310 | { |
1311 | if (error) | |
1312 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1313 | abfd, section, address, name); | |
1314 | else | |
1315 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1316 | abfd, section, address, name); | |
1317 | } | |
1318 | else if (error) | |
1319 | einfo ("%X"); | |
252b5132 RH |
1320 | } |
1321 | else | |
1322 | { | |
1323 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1324 | { |
0b28295d ILT |
1325 | if (error) |
1326 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1327 | abfd, name); | |
1328 | else | |
1329 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1330 | abfd, name); | |
b6f29aaa | 1331 | } |
252b5132 | 1332 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1333 | { |
1334 | if (error) | |
1335 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1336 | abfd, name); | |
1337 | else | |
1338 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1339 | abfd, name); | |
1340 | } | |
1341 | else if (error) | |
1342 | einfo ("%X"); | |
252b5132 RH |
1343 | } |
1344 | ||
b34976b6 | 1345 | return TRUE; |
252b5132 RH |
1346 | } |
1347 | ||
8aae64e6 AO |
1348 | /* Counter to limit the number of relocation overflow error messages |
1349 | to print. Errors are printed as it is decremented. When it's | |
1350 | called and the counter is zero, a final message is printed | |
1351 | indicating more relocations were omitted. When it gets to -1, no | |
1352 | such errors are printed. If it's initially set to a value less | |
1353 | than -1, all such errors will be printed (--verbose does this). */ | |
1354 | ||
1355 | int overflow_cutoff_limit = 10; | |
1356 | ||
252b5132 RH |
1357 | /* This is called when a reloc overflows. */ |
1358 | ||
b34976b6 | 1359 | static bfd_boolean |
0e86e20e | 1360 | reloc_overflow (struct bfd_link_info *info, |
dfeffb9f | 1361 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1362 | const char *name, |
1363 | const char *reloc_name, | |
1364 | bfd_vma addend, | |
1365 | bfd *abfd, | |
1366 | asection *section, | |
1367 | bfd_vma address) | |
252b5132 | 1368 | { |
8aae64e6 AO |
1369 | if (overflow_cutoff_limit == -1) |
1370 | return TRUE; | |
1371 | ||
270396f2 | 1372 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1373 | |
1374 | if (overflow_cutoff_limit >= 0 | |
1375 | && overflow_cutoff_limit-- == 0) | |
1376 | { | |
1377 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1378 | return TRUE; | |
1379 | } | |
1380 | ||
dfeffb9f L |
1381 | if (entry) |
1382 | { | |
1383 | while (entry->type == bfd_link_hash_indirect | |
1384 | || entry->type == bfd_link_hash_warning) | |
1385 | entry = entry->u.i.link; | |
1386 | switch (entry->type) | |
1387 | { | |
1388 | case bfd_link_hash_undefined: | |
1389 | case bfd_link_hash_undefweak: | |
1390 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1391 | reloc_name, entry->root.string); | |
1392 | break; | |
1393 | case bfd_link_hash_defined: | |
1394 | case bfd_link_hash_defweak: | |
1395 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1396 | reloc_name, entry->root.string, | |
a6e1b90f L |
1397 | entry->u.def.section, |
1398 | entry->u.def.section == bfd_abs_section_ptr | |
0e86e20e | 1399 | ? info->output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1400 | break; |
1401 | default: | |
1402 | abort (); | |
1403 | break; | |
1404 | } | |
1405 | } | |
1406 | else | |
1407 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1408 | reloc_name, name); | |
252b5132 RH |
1409 | if (addend != 0) |
1410 | einfo ("+%v", addend); | |
1411 | einfo ("\n"); | |
b34976b6 | 1412 | return TRUE; |
252b5132 RH |
1413 | } |
1414 | ||
1415 | /* This is called when a dangerous relocation is made. */ | |
1416 | ||
b34976b6 | 1417 | static bfd_boolean |
1579bae1 AM |
1418 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1419 | const char *message, | |
1420 | bfd *abfd, | |
1421 | asection *section, | |
1422 | bfd_vma address) | |
252b5132 | 1423 | { |
270396f2 | 1424 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1425 | abfd, section, address, message); |
b34976b6 | 1426 | return TRUE; |
252b5132 RH |
1427 | } |
1428 | ||
1429 | /* This is called when a reloc is being generated attached to a symbol | |
1430 | that is not being output. */ | |
1431 | ||
b34976b6 | 1432 | static bfd_boolean |
1579bae1 AM |
1433 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1434 | const char *name, | |
1435 | bfd *abfd, | |
1436 | asection *section, | |
1437 | bfd_vma address) | |
252b5132 | 1438 | { |
270396f2 | 1439 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1440 | abfd, section, address, name); |
b34976b6 | 1441 | return TRUE; |
252b5132 RH |
1442 | } |
1443 | ||
1444 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1445 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1446 | using the -y option, while notice_all is set if the --cref option |
1447 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1448 | linker script; and if plugins are active, since they need to monitor | |
1449 | all references from non-IR files. */ | |
252b5132 | 1450 | |
b34976b6 | 1451 | static bfd_boolean |
1579bae1 | 1452 | notice (struct bfd_link_info *info, |
35ed3f94 | 1453 | struct bfd_link_hash_entry *h, |
46135103 | 1454 | struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, |
1579bae1 AM |
1455 | bfd *abfd, |
1456 | asection *section, | |
16d96b5b | 1457 | bfd_vma value, |
46135103 | 1458 | flagword flags ATTRIBUTE_UNUSED) |
252b5132 | 1459 | { |
35ed3f94 AM |
1460 | const char *name; |
1461 | ||
1462 | if (h == NULL) | |
5061a885 AM |
1463 | { |
1464 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1465 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1466 | return TRUE; |
1467 | } | |
1468 | ||
35ed3f94 | 1469 | name = h->root.string; |
5d3236ee | 1470 | if (info->notice_hash != NULL |
9e2278f5 | 1471 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1472 | { |
1473 | if (bfd_is_und_section (section)) | |
1474 | einfo ("%B: reference to %s\n", abfd, name); | |
1475 | else | |
1476 | einfo ("%B: definition of %s\n", abfd, name); | |
1477 | } | |
1478 | ||
1479 | if (command_line.cref || nocrossref_list != NULL) | |
1480 | add_cref (name, abfd, section, value); | |
1481 | ||
b34976b6 | 1482 | return TRUE; |
252b5132 | 1483 | } |