Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
6f2750fe | 2 | Copyright (C) 1991-2016 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; |
aec6b87e | 281 | link_info.dynamic_undefined_weak = -1; |
e0076ab3 | 282 | link_info.pei386_auto_import = -1; |
db6751f2 | 283 | link_info.spare_dynamic_tags = 5; |
967928e9 | 284 | link_info.path_separator = ':'; |
6c3bc0f8 NC |
285 | #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
286 | link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; | |
287 | #endif | |
24718e3b | 288 | |
252b5132 | 289 | ldfile_add_arch (""); |
252b5132 RH |
290 | emulation = get_emulation (argc, argv); |
291 | ldemul_choose_mode (emulation); | |
742aeb63 | 292 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
293 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
294 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 | 295 | lang_init (); |
18d6a79d | 296 | ldexp_init (); |
252b5132 | 297 | ldemul_before_parse (); |
b34976b6 | 298 | lang_has_input_file = FALSE; |
252b5132 RH |
299 | parse_args (argc, argv); |
300 | ||
2d643429 NC |
301 | if (config.hash_table_size != 0) |
302 | bfd_hash_set_default_size (config.hash_table_size); | |
303 | ||
9bbc1a67 AM |
304 | #ifdef ENABLE_PLUGINS |
305 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
d82184d7 | 306 | plugin_load_plugins (); |
9bbc1a67 | 307 | #endif /* ENABLE_PLUGINS */ |
36af4a4e | 308 | |
9bbc1a67 | 309 | ldemul_set_symbols (); |
252b5132 | 310 | |
14be8564 L |
311 | /* If we have not already opened and parsed a linker script, |
312 | try the default script from command line first. */ | |
313 | if (saved_script_handle == NULL | |
314 | && command_line.default_script != NULL) | |
315 | { | |
316 | ldfile_open_command_file (command_line.default_script); | |
317 | parser_input = input_script; | |
318 | yyparse (); | |
319 | } | |
320 | ||
b9a8de1e NC |
321 | /* If we have not already opened and parsed a linker script |
322 | read the emulation's appropriate default script. */ | |
b90e1c6f | 323 | if (saved_script_handle == NULL) |
252b5132 | 324 | { |
252b5132 | 325 | int isfile; |
b7a26f91 | 326 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
327 | |
328 | if (isfile) | |
7d24f02c | 329 | ldfile_open_default_command_file (s); |
252b5132 | 330 | else |
b7a26f91 | 331 | { |
252b5132 | 332 | lex_string = s; |
dab69f68 | 333 | lex_redirect (s, _("built in linker script"), 1); |
252b5132 RH |
334 | } |
335 | parser_input = input_script; | |
336 | yyparse (); | |
337 | lex_string = NULL; | |
338 | } | |
339 | ||
cd6f1cf3 | 340 | if (verbose) |
b9a8de1e | 341 | { |
9cb61eab AM |
342 | if (saved_script_handle) |
343 | info_msg (_("using external linker script:")); | |
344 | else | |
345 | info_msg (_("using internal linker script:")); | |
346 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
347 | |
348 | if (saved_script_handle) | |
349 | { | |
74699268 | 350 | static const int ld_bufsz = 8193; |
b9a8de1e | 351 | size_t n; |
1e9cc1c2 | 352 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
353 | |
354 | rewind (saved_script_handle); | |
74699268 | 355 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 356 | { |
b7a26f91 | 357 | buf[n] = 0; |
b9a8de1e NC |
358 | info_msg (buf); |
359 | } | |
360 | rewind (saved_script_handle); | |
361 | free (buf); | |
362 | } | |
363 | else | |
364 | { | |
365 | int isfile; | |
366 | ||
b7a26f91 | 367 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 368 | } |
b7a26f91 | 369 | |
b9a8de1e NC |
370 | info_msg ("\n==================================================\n"); |
371 | } | |
372 | ||
30824704 RM |
373 | if (command_line.print_output_format) |
374 | info_msg ("%s\n", lang_get_output_target ()); | |
375 | ||
252b5132 RH |
376 | lang_final (); |
377 | ||
61e2488c JT |
378 | /* If the only command line argument has been -v or --version or --verbose |
379 | then ignore any input files provided by linker scripts and exit now. | |
380 | We do not want to create an output file when the linker is just invoked | |
381 | to provide version information. */ | |
382 | if (argc == 2 && version_printed) | |
383 | xexit (0); | |
384 | ||
b34976b6 | 385 | if (!lang_has_input_file) |
252b5132 | 386 | { |
30824704 | 387 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
388 | xexit (0); |
389 | einfo (_("%P%F: no input files\n")); | |
390 | } | |
391 | ||
392 | if (trace_files) | |
0125cdf2 | 393 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
394 | |
395 | ldemul_after_parse (); | |
396 | ||
252b5132 RH |
397 | if (config.map_filename) |
398 | { | |
399 | if (strcmp (config.map_filename, "-") == 0) | |
400 | { | |
401 | config.map_file = stdout; | |
402 | } | |
403 | else | |
404 | { | |
405 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
406 | if (config.map_file == (FILE *) NULL) | |
407 | { | |
408 | bfd_set_error (bfd_error_system_call); | |
409 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
410 | config.map_filename); | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
252b5132 RH |
415 | lang_process (); |
416 | ||
417 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 418 | symbols, and possibly multiple definitions. */ |
0e1862bb | 419 | if (bfd_link_relocatable (&link_info)) |
f13a99db | 420 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 421 | else |
f13a99db | 422 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 | 423 | |
0ce398f1 L |
424 | if ((link_info.compress_debug & COMPRESS_DEBUG)) |
425 | { | |
426 | link_info.output_bfd->flags |= BFD_COMPRESS; | |
427 | if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) | |
428 | link_info.output_bfd->flags |= BFD_COMPRESS_GABI; | |
429 | } | |
430 | ||
252b5132 RH |
431 | ldwrite (); |
432 | ||
433 | if (config.map_file != NULL) | |
434 | lang_map (); | |
435 | if (command_line.cref) | |
436 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
437 | if (nocrossref_list != NULL) | |
438 | check_nocrossrefs (); | |
3604cb1f TG |
439 | if (command_line.print_memory_usage) |
440 | lang_print_memory_usage (); | |
edf84efc NC |
441 | #if 0 |
442 | { | |
443 | struct bfd_link_hash_entry * h; | |
252b5132 | 444 | |
edf84efc NC |
445 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
446 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); | |
447 | } | |
448 | #endif | |
18d6a79d | 449 | ldexp_finish (); |
750877ba L |
450 | lang_finish (); |
451 | ||
1049f94e | 452 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 453 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 454 | want to ignore for relocatable output?) */ |
b34976b6 | 455 | if (!config.make_executable && !force_make_executable) |
252b5132 | 456 | { |
b34976b6 | 457 | if (trace_files) |
0125cdf2 NC |
458 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
459 | output_filename); | |
252b5132 | 460 | |
4309cbf2 | 461 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
462 | xexit (1); |
463 | } | |
464 | else | |
465 | { | |
f13a99db AM |
466 | if (! bfd_close (link_info.output_bfd)) |
467 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
468 | |
469 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
470 | executable file and it doesn't end in .exe, copy it to one |
471 | which does. */ | |
0e1862bb L |
472 | if (!bfd_link_relocatable (&link_info) |
473 | && command_line.force_exe_suffix) | |
252b5132 RH |
474 | { |
475 | int len = strlen (output_filename); | |
0125cdf2 | 476 | |
6d5e62f8 | 477 | if (len < 4 |
252b5132 RH |
478 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
479 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
480 | { | |
481 | FILE *src; | |
482 | FILE *dst; | |
483 | const int bsize = 4096; | |
1e9cc1c2 | 484 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 485 | int l; |
1e9cc1c2 | 486 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 487 | |
252b5132 RH |
488 | strcpy (dst_name, output_filename); |
489 | strcat (dst_name, ".exe"); | |
490 | src = fopen (output_filename, FOPEN_RB); | |
491 | dst = fopen (dst_name, FOPEN_WB); | |
492 | ||
493 | if (!src) | |
b3862264 | 494 | einfo (_("%P%F: unable to open for source of copy `%s'\n"), |
1579bae1 | 495 | output_filename); |
252b5132 | 496 | if (!dst) |
b3862264 | 497 | einfo (_("%P%F: unable to open for destination of copy `%s'\n"), |
1579bae1 | 498 | dst_name); |
252b5132 RH |
499 | while ((l = fread (buf, 1, bsize, src)) > 0) |
500 | { | |
501 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 502 | |
252b5132 | 503 | if (done != l) |
0125cdf2 | 504 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 505 | } |
0125cdf2 | 506 | |
252b5132 RH |
507 | fclose (src); |
508 | if (fclose (dst) == EOF) | |
0125cdf2 | 509 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
510 | free (dst_name); |
511 | free (buf); | |
512 | } | |
513 | } | |
514 | } | |
515 | ||
516 | END_PROGRESS (program_name); | |
517 | ||
518 | if (config.stats) | |
519 | { | |
520 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 521 | char *lim = (char *) sbrk (0); |
252b5132 RH |
522 | #endif |
523 | long run_time = get_run_time () - start_time; | |
524 | ||
e922bcab | 525 | fflush (stdout); |
252b5132 RH |
526 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
527 | program_name, run_time / 1000000, run_time % 1000000); | |
528 | #ifdef HAVE_SBRK | |
529 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
24a09713 | 530 | (long) (lim - start_sbrk)); |
252b5132 | 531 | #endif |
e922bcab | 532 | fflush (stderr); |
252b5132 RH |
533 | } |
534 | ||
4309cbf2 | 535 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
536 | output_filename = NULL; |
537 | ||
538 | xexit (0); | |
539 | return 0; | |
540 | } | |
541 | ||
e2243057 RS |
542 | /* If the configured sysroot is relocatable, try relocating it based on |
543 | default prefix FROM. Return the relocated directory if it exists, | |
544 | otherwise return null. */ | |
545 | ||
546 | static char * | |
547 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
548 | { | |
549 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
550 | char *path; | |
551 | struct stat s; | |
552 | ||
553 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
554 | if (path) | |
555 | { | |
556 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
557 | return path; | |
558 | free (path); | |
559 | } | |
560 | #endif | |
561 | return 0; | |
562 | } | |
563 | ||
564 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
565 | ||
566 | static const char * | |
567 | get_sysroot (int argc, char **argv) | |
568 | { | |
569 | int i; | |
570 | const char *path; | |
571 | ||
572 | for (i = 1; i < argc; i++) | |
0112cd26 | 573 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
574 | return argv[i] + strlen ("--sysroot="); |
575 | ||
576 | path = get_relative_sysroot (BINDIR); | |
577 | if (path) | |
578 | return path; | |
579 | ||
580 | path = get_relative_sysroot (TOOLBINDIR); | |
581 | if (path) | |
582 | return path; | |
583 | ||
584 | return TARGET_SYSTEM_ROOT; | |
585 | } | |
586 | ||
252b5132 RH |
587 | /* We need to find any explicitly given emulation in order to initialize the |
588 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
589 | ||
590 | static char * | |
1579bae1 | 591 | get_emulation (int argc, char **argv) |
252b5132 RH |
592 | { |
593 | char *emulation; | |
594 | int i; | |
595 | ||
596 | emulation = getenv (EMULATION_ENVIRON); | |
597 | if (emulation == NULL) | |
598 | emulation = DEFAULT_EMULATION; | |
599 | ||
600 | for (i = 1; i < argc; i++) | |
601 | { | |
0112cd26 | 602 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
603 | { |
604 | if (argv[i][2] == '\0') | |
605 | { | |
606 | /* -m EMUL */ | |
607 | if (i < argc - 1) | |
608 | { | |
609 | emulation = argv[i + 1]; | |
610 | i++; | |
611 | } | |
612 | else | |
0125cdf2 | 613 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
614 | } |
615 | else if (strcmp (argv[i], "-mips1") == 0 | |
616 | || strcmp (argv[i], "-mips2") == 0 | |
617 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 618 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
619 | || strcmp (argv[i], "-mips5") == 0 |
620 | || strcmp (argv[i], "-mips32") == 0 | |
621 | || strcmp (argv[i], "-mips32r2") == 0 | |
7361da2c | 622 | || strcmp (argv[i], "-mips32r6") == 0 |
5f74bc13 | 623 | || strcmp (argv[i], "-mips64") == 0 |
7361da2c AB |
624 | || strcmp (argv[i], "-mips64r2") == 0 |
625 | || strcmp (argv[i], "-mips64r6") == 0) | |
252b5132 | 626 | { |
31d677f9 | 627 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
628 | passed to the linker by some MIPS compilers. They |
629 | generally tell the linker to use a slightly different | |
630 | library path. Perhaps someday these should be | |
631 | implemented as emulations; until then, we just ignore | |
632 | the arguments and hope that nobody ever creates | |
633 | emulations named ips1, ips2 or ips3. */ | |
634 | } | |
635 | else if (strcmp (argv[i], "-m486") == 0) | |
636 | { | |
637 | /* FIXME: The argument -m486 is passed to the linker on | |
638 | some Linux systems. Hope that nobody creates an | |
639 | emulation named 486. */ | |
640 | } | |
641 | else | |
642 | { | |
643 | /* -mEMUL */ | |
644 | emulation = &argv[i][2]; | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | return emulation; | |
650 | } | |
651 | ||
252b5132 | 652 | void |
1579bae1 | 653 | add_ysym (const char *name) |
252b5132 | 654 | { |
1579bae1 | 655 | if (link_info.notice_hash == NULL) |
252b5132 | 656 | { |
1e9cc1c2 NC |
657 | link_info.notice_hash = |
658 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
659 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
660 | bfd_hash_newfunc, | |
661 | sizeof (struct bfd_hash_entry), | |
662 | 61)) | |
252b5132 | 663 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 664 | } |
252b5132 | 665 | |
1579bae1 | 666 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
667 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
668 | } | |
669 | ||
0e86e20e AM |
670 | void |
671 | add_ignoresym (struct bfd_link_info *info, const char *name) | |
672 | { | |
673 | if (info->ignore_hash == NULL) | |
674 | { | |
675 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); | |
676 | if (! bfd_hash_table_init_n (info->ignore_hash, | |
677 | bfd_hash_newfunc, | |
678 | sizeof (struct bfd_hash_entry), | |
679 | 61)) | |
680 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
681 | } | |
682 | ||
683 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) | |
684 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
685 | } | |
686 | ||
252b5132 RH |
687 | /* Record a symbol to be wrapped, from the --wrap option. */ |
688 | ||
689 | void | |
1579bae1 | 690 | add_wrap (const char *name) |
252b5132 RH |
691 | { |
692 | if (link_info.wrap_hash == NULL) | |
693 | { | |
1e9cc1c2 NC |
694 | link_info.wrap_hash = |
695 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
696 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
697 | bfd_hash_newfunc, | |
698 | sizeof (struct bfd_hash_entry), | |
699 | 61)) | |
252b5132 RH |
700 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
701 | } | |
0125cdf2 | 702 | |
b34976b6 | 703 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
704 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
705 | } | |
706 | ||
707 | /* Handle the -retain-symbols-file option. */ | |
708 | ||
709 | void | |
1579bae1 | 710 | add_keepsyms_file (const char *filename) |
252b5132 RH |
711 | { |
712 | FILE *file; | |
713 | char *buf; | |
714 | size_t bufsize; | |
715 | int c; | |
716 | ||
717 | if (link_info.strip == strip_some) | |
718 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
719 | ||
720 | file = fopen (filename, "r"); | |
1579bae1 | 721 | if (file == NULL) |
252b5132 RH |
722 | { |
723 | bfd_set_error (bfd_error_system_call); | |
724 | einfo ("%X%P: %s: %E\n", filename); | |
725 | return; | |
726 | } | |
727 | ||
1e9cc1c2 NC |
728 | link_info.keep_hash = (struct bfd_hash_table *) |
729 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
730 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
731 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
732 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
733 | ||
734 | bufsize = 100; | |
1e9cc1c2 | 735 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
736 | |
737 | c = getc (file); | |
738 | while (c != EOF) | |
739 | { | |
3882b010 | 740 | while (ISSPACE (c)) |
252b5132 RH |
741 | c = getc (file); |
742 | ||
743 | if (c != EOF) | |
744 | { | |
745 | size_t len = 0; | |
746 | ||
3882b010 | 747 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
748 | { |
749 | buf[len] = c; | |
750 | ++len; | |
751 | if (len >= bufsize) | |
752 | { | |
753 | bufsize *= 2; | |
1e9cc1c2 | 754 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
755 | } |
756 | c = getc (file); | |
757 | } | |
758 | ||
759 | buf[len] = '\0'; | |
760 | ||
1579bae1 | 761 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
762 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
763 | } | |
764 | } | |
765 | ||
766 | if (link_info.strip != strip_none) | |
767 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
768 | ||
5ed6aba4 | 769 | free (buf); |
252b5132 | 770 | link_info.strip = strip_some; |
d9313f4f | 771 | fclose (file); |
252b5132 RH |
772 | } |
773 | \f | |
774 | /* Callbacks from the BFD linker routines. */ | |
775 | ||
776 | /* This is called when BFD has decided to include an archive member in | |
777 | a link. */ | |
778 | ||
b34976b6 | 779 | static bfd_boolean |
e1fffbe6 | 780 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 781 | bfd *abfd, |
5d3236ee DK |
782 | const char *name, |
783 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
784 | { |
785 | lang_input_statement_type *input; | |
5d3236ee | 786 | lang_input_statement_type orig_input; |
252b5132 | 787 | |
1e9cc1c2 NC |
788 | input = (lang_input_statement_type *) |
789 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
790 | input->filename = abfd->filename; |
791 | input->local_sym_name = abfd->filename; | |
792 | input->the_bfd = abfd; | |
252b5132 | 793 | |
5d3236ee DK |
794 | /* Save the original data for trace files/tries below, as plugins |
795 | (if enabled) may possibly alter it to point to a replacement | |
796 | BFD, but we still want to output the original BFD filename. */ | |
797 | orig_input = *input; | |
798 | #ifdef ENABLE_PLUGINS | |
716db898 | 799 | if (link_info.lto_plugin_active && !no_more_claiming) |
5d3236ee DK |
800 | { |
801 | /* We must offer this archive member to the plugins to claim. */ | |
35a1e5f3 L |
802 | plugin_maybe_claim (input); |
803 | if (input->flags.claimed) | |
5d3236ee | 804 | { |
35a1e5f3 L |
805 | input->flags.claim_archive = TRUE; |
806 | *subsbfd = input->the_bfd; | |
5d3236ee DK |
807 | } |
808 | } | |
809 | #endif /* ENABLE_PLUGINS */ | |
810 | ||
252b5132 RH |
811 | ldlang_add_file (input); |
812 | ||
1579bae1 | 813 | if (config.map_file != NULL) |
252b5132 | 814 | { |
b34976b6 | 815 | static bfd_boolean header_printed; |
252b5132 RH |
816 | struct bfd_link_hash_entry *h; |
817 | bfd *from; | |
818 | int len; | |
819 | ||
e1fffbe6 | 820 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
821 | |
822 | if (h == NULL) | |
823 | from = NULL; | |
824 | else | |
825 | { | |
826 | switch (h->type) | |
827 | { | |
828 | default: | |
829 | from = NULL; | |
830 | break; | |
831 | ||
832 | case bfd_link_hash_defined: | |
833 | case bfd_link_hash_defweak: | |
834 | from = h->u.def.section->owner; | |
835 | break; | |
836 | ||
837 | case bfd_link_hash_undefined: | |
838 | case bfd_link_hash_undefweak: | |
839 | from = h->u.undef.abfd; | |
840 | break; | |
841 | ||
842 | case bfd_link_hash_common: | |
843 | from = h->u.c.p->section->owner; | |
844 | break; | |
845 | } | |
846 | } | |
847 | ||
848 | if (! header_printed) | |
849 | { | |
850 | char buf[100]; | |
851 | ||
16e4ecc0 AM |
852 | sprintf (buf, _("Archive member included " |
853 | "to satisfy reference by file (symbol)\n\n")); | |
252b5132 | 854 | minfo ("%s", buf); |
b34976b6 | 855 | header_printed = TRUE; |
252b5132 RH |
856 | } |
857 | ||
858 | if (bfd_my_archive (abfd) == NULL) | |
859 | { | |
860 | minfo ("%s", bfd_get_filename (abfd)); | |
861 | len = strlen (bfd_get_filename (abfd)); | |
862 | } | |
863 | else | |
864 | { | |
865 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
866 | bfd_get_filename (abfd)); | |
867 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
868 | + strlen (bfd_get_filename (abfd)) | |
869 | + 2); | |
870 | } | |
871 | ||
872 | if (len >= 29) | |
873 | { | |
874 | print_nl (); | |
875 | len = 0; | |
876 | } | |
877 | while (len < 30) | |
878 | { | |
879 | print_space (); | |
880 | ++len; | |
881 | } | |
882 | ||
883 | if (from != NULL) | |
884 | minfo ("%B ", from); | |
885 | if (h != NULL) | |
886 | minfo ("(%T)\n", h->root.string); | |
887 | else | |
888 | minfo ("(%s)\n", name); | |
889 | } | |
890 | ||
cd6f1cf3 | 891 | if (trace_files || verbose) |
5d3236ee | 892 | info_msg ("%I\n", &orig_input); |
b34976b6 | 893 | return TRUE; |
252b5132 RH |
894 | } |
895 | ||
896 | /* This is called when BFD has discovered a symbol which is defined | |
897 | multiple times. */ | |
898 | ||
b34976b6 | 899 | static bfd_boolean |
24f58f47 AM |
900 | multiple_definition (struct bfd_link_info *info, |
901 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
902 | bfd *nbfd, |
903 | asection *nsec, | |
904 | bfd_vma nval) | |
252b5132 | 905 | { |
24f58f47 AM |
906 | const char *name; |
907 | bfd *obfd; | |
908 | asection *osec; | |
909 | bfd_vma oval; | |
910 | ||
911 | if (info->allow_multiple_definition) | |
912 | return TRUE; | |
913 | ||
914 | switch (h->type) | |
915 | { | |
916 | case bfd_link_hash_defined: | |
917 | osec = h->u.def.section; | |
918 | oval = h->u.def.value; | |
919 | obfd = h->u.def.section->owner; | |
920 | break; | |
921 | case bfd_link_hash_indirect: | |
922 | osec = bfd_ind_section_ptr; | |
923 | oval = 0; | |
924 | obfd = NULL; | |
925 | break; | |
926 | default: | |
927 | abort (); | |
928 | } | |
929 | ||
930 | /* Ignore a redefinition of an absolute symbol to the | |
931 | same value; it's harmless. */ | |
932 | if (h->type == bfd_link_hash_defined | |
933 | && bfd_is_abs_section (osec) | |
934 | && bfd_is_abs_section (nsec) | |
935 | && nval == oval) | |
936 | return TRUE; | |
937 | ||
252b5132 RH |
938 | /* If either section has the output_section field set to |
939 | bfd_abs_section_ptr, it means that the section is being | |
940 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
941 | FIXME: It would be cleaner to somehow ignore symbols defined in |
942 | sections which are being discarded. */ | |
252b5132 RH |
943 | if ((osec->output_section != NULL |
944 | && ! bfd_is_abs_section (osec) | |
945 | && bfd_is_abs_section (osec->output_section)) | |
946 | || (nsec->output_section != NULL | |
947 | && ! bfd_is_abs_section (nsec) | |
948 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 949 | return TRUE; |
252b5132 | 950 | |
24f58f47 AM |
951 | name = h->root.string; |
952 | if (nbfd == NULL) | |
953 | { | |
954 | nbfd = obfd; | |
955 | nsec = osec; | |
956 | nval = oval; | |
957 | obfd = NULL; | |
958 | } | |
252b5132 RH |
959 | einfo (_("%X%C: multiple definition of `%T'\n"), |
960 | nbfd, nsec, nval, name); | |
1579bae1 | 961 | if (obfd != NULL) |
252b5132 | 962 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 963 | |
13761a11 | 964 | if (RELAXATION_ENABLED_BY_USER) |
9b14b192 NC |
965 | { |
966 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
13761a11 | 967 | DISABLE_RELAXATION; |
9b14b192 | 968 | } |
6d5e62f8 | 969 | |
b34976b6 | 970 | return TRUE; |
252b5132 RH |
971 | } |
972 | ||
973 | /* This is called when there is a definition of a common symbol, or | |
974 | when a common symbol is found for a symbol that is already defined, | |
975 | or when two common symbols are found. We only do something if | |
976 | -warn-common was used. */ | |
977 | ||
b34976b6 | 978 | static bfd_boolean |
1579bae1 | 979 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 980 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
981 | bfd *nbfd, |
982 | enum bfd_link_hash_type ntype, | |
983 | bfd_vma nsize) | |
252b5132 | 984 | { |
24f58f47 AM |
985 | const char *name; |
986 | bfd *obfd; | |
987 | enum bfd_link_hash_type otype; | |
988 | bfd_vma osize; | |
989 | ||
990 | if (!config.warn_common) | |
b34976b6 | 991 | return TRUE; |
252b5132 | 992 | |
24f58f47 AM |
993 | name = h->root.string; |
994 | otype = h->type; | |
995 | if (otype == bfd_link_hash_common) | |
996 | { | |
997 | obfd = h->u.c.p->section->owner; | |
998 | osize = h->u.c.size; | |
999 | } | |
1000 | else if (otype == bfd_link_hash_defined | |
1001 | || otype == bfd_link_hash_defweak) | |
1002 | { | |
1003 | obfd = h->u.def.section->owner; | |
1004 | osize = 0; | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | /* FIXME: It would nice if we could report the BFD which defined | |
1009 | an indirect symbol, but we don't have anywhere to store the | |
1010 | information. */ | |
1011 | obfd = NULL; | |
1012 | osize = 0; | |
1013 | } | |
1014 | ||
252b5132 RH |
1015 | if (ntype == bfd_link_hash_defined |
1016 | || ntype == bfd_link_hash_defweak | |
1017 | || ntype == bfd_link_hash_indirect) | |
1018 | { | |
1019 | ASSERT (otype == bfd_link_hash_common); | |
1020 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1021 | nbfd, name); | |
1022 | if (obfd != NULL) | |
1023 | einfo (_("%B: warning: common is here\n"), obfd); | |
1024 | } | |
1025 | else if (otype == bfd_link_hash_defined | |
1026 | || otype == bfd_link_hash_defweak | |
1027 | || otype == bfd_link_hash_indirect) | |
1028 | { | |
1029 | ASSERT (ntype == bfd_link_hash_common); | |
1030 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1031 | nbfd, name); | |
1032 | if (obfd != NULL) | |
1033 | einfo (_("%B: warning: defined here\n"), obfd); | |
1034 | } | |
1035 | else | |
1036 | { | |
1037 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1038 | if (osize > nsize) | |
1039 | { | |
1040 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1041 | nbfd, name); | |
1042 | if (obfd != NULL) | |
1043 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1044 | } | |
1045 | else if (nsize > osize) | |
1046 | { | |
1047 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1048 | nbfd, name); | |
1049 | if (obfd != NULL) | |
1050 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1051 | } | |
1052 | else | |
1053 | { | |
1054 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1055 | if (obfd != NULL) | |
1056 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1057 | } | |
1058 | } | |
1059 | ||
b34976b6 | 1060 | return TRUE; |
252b5132 RH |
1061 | } |
1062 | ||
1063 | /* This is called when BFD has discovered a set element. H is the | |
1064 | entry in the linker hash table for the set. SECTION and VALUE | |
1065 | represent a value which should be added to the set. */ | |
1066 | ||
b34976b6 | 1067 | static bfd_boolean |
1579bae1 AM |
1068 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1069 | struct bfd_link_hash_entry *h, | |
1070 | bfd_reloc_code_real_type reloc, | |
1071 | bfd *abfd, | |
1072 | asection *section, | |
1073 | bfd_vma value) | |
252b5132 RH |
1074 | { |
1075 | if (config.warn_constructors) | |
1076 | einfo (_("%P: warning: global constructor %s used\n"), | |
1077 | h->root.string); | |
1078 | ||
1079 | if (! config.build_constructors) | |
b34976b6 | 1080 | return TRUE; |
252b5132 | 1081 | |
1579bae1 | 1082 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1083 | |
1084 | if (h->type == bfd_link_hash_new) | |
1085 | { | |
1086 | h->type = bfd_link_hash_undefined; | |
1087 | h->u.undef.abfd = abfd; | |
1088 | /* We don't call bfd_link_add_undef to add this to the list of | |
1089 | undefined symbols because we are going to define it | |
1090 | ourselves. */ | |
1091 | } | |
1092 | ||
b34976b6 | 1093 | return TRUE; |
252b5132 RH |
1094 | } |
1095 | ||
1096 | /* This is called when BFD has discovered a constructor. This is only | |
1097 | called for some object file formats--those which do not handle | |
1098 | constructors in some more clever fashion. This is similar to | |
1099 | adding an element to a set, but less general. */ | |
1100 | ||
b34976b6 | 1101 | static bfd_boolean |
1579bae1 AM |
1102 | constructor_callback (struct bfd_link_info *info, |
1103 | bfd_boolean constructor, | |
1104 | const char *name, | |
1105 | bfd *abfd, | |
1106 | asection *section, | |
1107 | bfd_vma value) | |
252b5132 RH |
1108 | { |
1109 | char *s; | |
1110 | struct bfd_link_hash_entry *h; | |
1111 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1112 | ||
1113 | if (config.warn_constructors) | |
1114 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1115 | ||
1116 | if (! config.build_constructors) | |
b34976b6 | 1117 | return TRUE; |
252b5132 RH |
1118 | |
1119 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1120 | useful error message. */ | |
0e86e20e | 1121 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
0e1862bb | 1122 | && (bfd_link_relocatable (info) |
252b5132 RH |
1123 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1124 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1125 | ||
1126 | s = set_name; | |
1127 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1128 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1129 | if (constructor) | |
1130 | strcpy (s, "__CTOR_LIST__"); | |
1131 | else | |
1132 | strcpy (s, "__DTOR_LIST__"); | |
1133 | ||
b34976b6 | 1134 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1135 | if (h == (struct bfd_link_hash_entry *) NULL) |
1136 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1137 | if (h->type == bfd_link_hash_new) | |
1138 | { | |
1139 | h->type = bfd_link_hash_undefined; | |
1140 | h->u.undef.abfd = abfd; | |
1141 | /* We don't call bfd_link_add_undef to add this to the list of | |
1142 | undefined symbols because we are going to define it | |
1143 | ourselves. */ | |
1144 | } | |
1145 | ||
1146 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1147 | return TRUE; |
252b5132 RH |
1148 | } |
1149 | ||
1150 | /* A structure used by warning_callback to pass information through | |
1151 | bfd_map_over_sections. */ | |
1152 | ||
0125cdf2 NC |
1153 | struct warning_callback_info |
1154 | { | |
b34976b6 | 1155 | bfd_boolean found; |
252b5132 RH |
1156 | const char *warning; |
1157 | const char *symbol; | |
1158 | asymbol **asymbols; | |
1159 | }; | |
1160 | ||
4c6d802e L |
1161 | /* Look through the relocs to see if we can find a plausible address |
1162 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ | |
1163 | ||
1164 | static bfd_boolean | |
1165 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) | |
1166 | { | |
1167 | struct warning_callback_info cinfo; | |
1168 | ||
1169 | if (!bfd_generic_link_read_symbols (abfd)) | |
1170 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1171 | ||
1172 | cinfo.found = FALSE; | |
1173 | cinfo.warning = warning; | |
1174 | cinfo.symbol = symbol; | |
1175 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1176 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
1177 | return cinfo.found; | |
1178 | } | |
1179 | ||
252b5132 RH |
1180 | /* This is called when there is a reference to a warning symbol. */ |
1181 | ||
b34976b6 | 1182 | static bfd_boolean |
1579bae1 AM |
1183 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1184 | const char *warning, | |
1185 | const char *symbol, | |
1186 | bfd *abfd, | |
1187 | asection *section, | |
1188 | bfd_vma address) | |
252b5132 RH |
1189 | { |
1190 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1191 | have a cleaner interface, but what? */ | |
1192 | if (! config.warn_multiple_gp | |
1193 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1194 | return TRUE; |
252b5132 RH |
1195 | |
1196 | if (section != NULL) | |
300475fe | 1197 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1198 | else if (abfd == NULL) |
300475fe | 1199 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1200 | else if (symbol == NULL) |
300475fe | 1201 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
4c6d802e | 1202 | else if (! symbol_warning (warning, symbol, abfd)) |
252b5132 | 1203 | { |
4c6d802e L |
1204 | bfd *b; |
1205 | /* Search all input files for a reference to SYMBOL. */ | |
c72f2fb2 | 1206 | for (b = info->input_bfds; b; b = b->link.next) |
4c6d802e L |
1207 | if (b != abfd && symbol_warning (warning, symbol, b)) |
1208 | return TRUE; | |
1209 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); | |
252b5132 RH |
1210 | } |
1211 | ||
b34976b6 | 1212 | return TRUE; |
252b5132 RH |
1213 | } |
1214 | ||
1215 | /* This is called by warning_callback for each section. It checks the | |
1216 | relocs of the section to see if it can find a reference to the | |
1217 | symbol which triggered the warning. If it can, it uses the reloc | |
1218 | to give an error message with a file and line number. */ | |
1219 | ||
1220 | static void | |
1579bae1 | 1221 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1222 | { |
1e9cc1c2 | 1223 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1224 | long relsize; |
1225 | arelent **relpp; | |
1226 | long relcount; | |
1227 | arelent **p, **pend; | |
1228 | ||
1229 | if (info->found) | |
1230 | return; | |
1231 | ||
1232 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1233 | if (relsize < 0) | |
1234 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1235 | if (relsize == 0) | |
1236 | return; | |
1237 | ||
1e9cc1c2 | 1238 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1239 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1240 | if (relcount < 0) | |
1241 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1242 | ||
1243 | p = relpp; | |
1244 | pend = p + relcount; | |
1245 | for (; p < pend && *p != NULL; p++) | |
1246 | { | |
1247 | arelent *q = *p; | |
1248 | ||
1249 | if (q->sym_ptr_ptr != NULL | |
1250 | && *q->sym_ptr_ptr != NULL | |
1251 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1252 | { | |
1253 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1254 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1255 | info->warning); | |
b34976b6 | 1256 | info->found = TRUE; |
252b5132 RH |
1257 | break; |
1258 | } | |
1259 | } | |
1260 | ||
1261 | free (relpp); | |
1262 | } | |
1263 | ||
1264 | /* This is called when an undefined symbol is found. */ | |
1265 | ||
b34976b6 | 1266 | static bfd_boolean |
0e86e20e | 1267 | undefined_symbol (struct bfd_link_info *info, |
1579bae1 AM |
1268 | const char *name, |
1269 | bfd *abfd, | |
1270 | asection *section, | |
1271 | bfd_vma address, | |
0b28295d | 1272 | bfd_boolean error) |
252b5132 RH |
1273 | { |
1274 | static char *error_name; | |
1275 | static unsigned int error_count; | |
1276 | ||
1277 | #define MAX_ERRORS_IN_A_ROW 5 | |
1278 | ||
0e86e20e AM |
1279 | if (info->ignore_hash != NULL |
1280 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) | |
1281 | return TRUE; | |
1282 | ||
252b5132 RH |
1283 | if (config.warn_once) |
1284 | { | |
252b5132 | 1285 | /* Only warn once about a particular undefined symbol. */ |
0e86e20e | 1286 | add_ignoresym (info, name); |
252b5132 RH |
1287 | } |
1288 | ||
1289 | /* We never print more than a reasonable number of errors in a row | |
1290 | for a single symbol. */ | |
1579bae1 | 1291 | if (error_name != NULL |
252b5132 RH |
1292 | && strcmp (name, error_name) == 0) |
1293 | ++error_count; | |
1294 | else | |
1295 | { | |
1296 | error_count = 0; | |
1579bae1 | 1297 | if (error_name != NULL) |
252b5132 | 1298 | free (error_name); |
d1b2b2dc | 1299 | error_name = xstrdup (name); |
252b5132 RH |
1300 | } |
1301 | ||
1302 | if (section != NULL) | |
1303 | { | |
1304 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1305 | { |
0b28295d ILT |
1306 | if (error) |
1307 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1308 | abfd, section, address, name); | |
1309 | else | |
1310 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1311 | abfd, section, address, name); | |
b6f29aaa | 1312 | } |
252b5132 | 1313 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1314 | { |
1315 | if (error) | |
1316 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1317 | abfd, section, address, name); | |
1318 | else | |
1319 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1320 | abfd, section, address, name); | |
1321 | } | |
1322 | else if (error) | |
1323 | einfo ("%X"); | |
252b5132 RH |
1324 | } |
1325 | else | |
1326 | { | |
1327 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1328 | { |
0b28295d ILT |
1329 | if (error) |
1330 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1331 | abfd, name); | |
1332 | else | |
1333 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1334 | abfd, name); | |
b6f29aaa | 1335 | } |
252b5132 | 1336 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1337 | { |
1338 | if (error) | |
1339 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1340 | abfd, name); | |
1341 | else | |
1342 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1343 | abfd, name); | |
1344 | } | |
1345 | else if (error) | |
1346 | einfo ("%X"); | |
252b5132 RH |
1347 | } |
1348 | ||
b34976b6 | 1349 | return TRUE; |
252b5132 RH |
1350 | } |
1351 | ||
8aae64e6 AO |
1352 | /* Counter to limit the number of relocation overflow error messages |
1353 | to print. Errors are printed as it is decremented. When it's | |
1354 | called and the counter is zero, a final message is printed | |
1355 | indicating more relocations were omitted. When it gets to -1, no | |
1356 | such errors are printed. If it's initially set to a value less | |
1357 | than -1, all such errors will be printed (--verbose does this). */ | |
1358 | ||
1359 | int overflow_cutoff_limit = 10; | |
1360 | ||
252b5132 RH |
1361 | /* This is called when a reloc overflows. */ |
1362 | ||
b34976b6 | 1363 | static bfd_boolean |
0e86e20e | 1364 | reloc_overflow (struct bfd_link_info *info, |
dfeffb9f | 1365 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1366 | const char *name, |
1367 | const char *reloc_name, | |
1368 | bfd_vma addend, | |
1369 | bfd *abfd, | |
1370 | asection *section, | |
1371 | bfd_vma address) | |
252b5132 | 1372 | { |
8aae64e6 AO |
1373 | if (overflow_cutoff_limit == -1) |
1374 | return TRUE; | |
1375 | ||
270396f2 | 1376 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1377 | |
1378 | if (overflow_cutoff_limit >= 0 | |
1379 | && overflow_cutoff_limit-- == 0) | |
1380 | { | |
1381 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1382 | return TRUE; | |
1383 | } | |
1384 | ||
dfeffb9f L |
1385 | if (entry) |
1386 | { | |
1387 | while (entry->type == bfd_link_hash_indirect | |
1388 | || entry->type == bfd_link_hash_warning) | |
1389 | entry = entry->u.i.link; | |
1390 | switch (entry->type) | |
1391 | { | |
1392 | case bfd_link_hash_undefined: | |
1393 | case bfd_link_hash_undefweak: | |
1394 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1395 | reloc_name, entry->root.string); | |
1396 | break; | |
1397 | case bfd_link_hash_defined: | |
1398 | case bfd_link_hash_defweak: | |
1399 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1400 | reloc_name, entry->root.string, | |
a6e1b90f L |
1401 | entry->u.def.section, |
1402 | entry->u.def.section == bfd_abs_section_ptr | |
0e86e20e | 1403 | ? info->output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1404 | break; |
1405 | default: | |
1406 | abort (); | |
1407 | break; | |
1408 | } | |
1409 | } | |
1410 | else | |
1411 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1412 | reloc_name, name); | |
252b5132 RH |
1413 | if (addend != 0) |
1414 | einfo ("+%v", addend); | |
1415 | einfo ("\n"); | |
b34976b6 | 1416 | return TRUE; |
252b5132 RH |
1417 | } |
1418 | ||
1419 | /* This is called when a dangerous relocation is made. */ | |
1420 | ||
b34976b6 | 1421 | static bfd_boolean |
1579bae1 AM |
1422 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1423 | const char *message, | |
1424 | bfd *abfd, | |
1425 | asection *section, | |
1426 | bfd_vma address) | |
252b5132 | 1427 | { |
270396f2 | 1428 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1429 | abfd, section, address, message); |
b34976b6 | 1430 | return TRUE; |
252b5132 RH |
1431 | } |
1432 | ||
1433 | /* This is called when a reloc is being generated attached to a symbol | |
1434 | that is not being output. */ | |
1435 | ||
b34976b6 | 1436 | static bfd_boolean |
1579bae1 AM |
1437 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1438 | const char *name, | |
1439 | bfd *abfd, | |
1440 | asection *section, | |
1441 | bfd_vma address) | |
252b5132 | 1442 | { |
270396f2 | 1443 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1444 | abfd, section, address, name); |
b34976b6 | 1445 | return TRUE; |
252b5132 RH |
1446 | } |
1447 | ||
1448 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1449 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1450 | using the -y option, while notice_all is set if the --cref option |
1451 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1452 | linker script; and if plugins are active, since they need to monitor | |
1453 | all references from non-IR files. */ | |
252b5132 | 1454 | |
b34976b6 | 1455 | static bfd_boolean |
1579bae1 | 1456 | notice (struct bfd_link_info *info, |
35ed3f94 | 1457 | struct bfd_link_hash_entry *h, |
46135103 | 1458 | struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, |
1579bae1 AM |
1459 | bfd *abfd, |
1460 | asection *section, | |
16d96b5b | 1461 | bfd_vma value, |
46135103 | 1462 | flagword flags ATTRIBUTE_UNUSED) |
252b5132 | 1463 | { |
35ed3f94 AM |
1464 | const char *name; |
1465 | ||
1466 | if (h == NULL) | |
5061a885 AM |
1467 | { |
1468 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1469 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1470 | return TRUE; |
1471 | } | |
1472 | ||
35ed3f94 | 1473 | name = h->root.string; |
5d3236ee | 1474 | if (info->notice_hash != NULL |
9e2278f5 | 1475 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1476 | { |
1477 | if (bfd_is_und_section (section)) | |
1478 | einfo ("%B: reference to %s\n", abfd, name); | |
1479 | else | |
1480 | einfo ("%B: definition of %s\n", abfd, name); | |
1481 | } | |
1482 | ||
1483 | if (command_line.cref || nocrossref_list != NULL) | |
1484 | add_cref (name, abfd, section, value); | |
1485 | ||
b34976b6 | 1486 | return TRUE; |
252b5132 | 1487 | } |