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252b5132 | 1 | /* Main program of GNU linker. |
4b95cf5c | 2 | Copyright (C) 1991-2014 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" | |
44 | #include "libbfd.h" | |
45 | #endif /* ENABLE_PLUGINS */ | |
252b5132 | 46 | |
0125cdf2 | 47 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
48 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
49 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
50 | #endif | |
51 | ||
52 | #include <string.h> | |
53 | ||
54 | #ifdef HAVE_SBRK | |
502bdb00 | 55 | #if !HAVE_DECL_SBRK |
1579bae1 | 56 | extern void *sbrk (); |
252b5132 RH |
57 | #endif |
58 | #endif | |
59 | ||
9c8ebd6a DJ |
60 | #ifndef TARGET_SYSTEM_ROOT |
61 | #define TARGET_SYSTEM_ROOT "" | |
62 | #endif | |
63 | ||
252b5132 RH |
64 | /* EXPORTS */ |
65 | ||
53d25da6 AM |
66 | FILE *saved_script_handle = NULL; |
67 | FILE *previous_script_handle = NULL; | |
68 | bfd_boolean force_make_executable = FALSE; | |
69 | ||
252b5132 RH |
70 | char *default_target; |
71 | const char *output_filename = "a.out"; | |
72 | ||
73 | /* Name this program was invoked by. */ | |
74 | char *program_name; | |
75 | ||
9c8ebd6a | 76 | /* The prefix for system library directories. */ |
e2243057 | 77 | const char *ld_sysroot; |
9c8ebd6a | 78 | |
3fe38064 NC |
79 | /* The canonical representation of ld_sysroot. */ |
80 | char * ld_canon_sysroot; | |
81 | int ld_canon_sysroot_len; | |
82 | ||
e8044f35 | 83 | /* Set by -G argument, for targets like MIPS ELF. */ |
252b5132 RH |
84 | int g_switch_value = 8; |
85 | ||
86 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 87 | bfd_boolean trace_files; |
252b5132 | 88 | |
cd6f1cf3 NC |
89 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
90 | bfd_boolean verbose; | |
252b5132 RH |
91 | |
92 | /* Nonzero means version number was printed, so exit successfully | |
93 | instead of complaining if no input files are given. */ | |
b34976b6 | 94 | bfd_boolean version_printed; |
252b5132 | 95 | |
b34976b6 AM |
96 | /* TRUE if we should demangle symbol names. */ |
97 | bfd_boolean demangling; | |
252b5132 RH |
98 | |
99 | args_type command_line; | |
100 | ||
101 | ld_config_type config; | |
102 | ||
bcaa7b3e L |
103 | sort_type sort_section; |
104 | ||
e2243057 RS |
105 | static const char *get_sysroot |
106 | (int, char **); | |
0125cdf2 | 107 | static char *get_emulation |
1579bae1 | 108 | (int, char **); |
0125cdf2 | 109 | static bfd_boolean add_archive_element |
5d3236ee | 110 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
0125cdf2 | 111 | static bfd_boolean multiple_definition |
24f58f47 | 112 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 113 | bfd *, asection *, bfd_vma); |
0125cdf2 | 114 | static bfd_boolean multiple_common |
24f58f47 AM |
115 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
116 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 117 | static bfd_boolean add_to_set |
1579bae1 AM |
118 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
119 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 120 | static bfd_boolean constructor_callback |
1579bae1 AM |
121 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
122 | asection *, bfd_vma); | |
0125cdf2 | 123 | static bfd_boolean warning_callback |
1579bae1 AM |
124 | (struct bfd_link_info *, const char *, const char *, bfd *, |
125 | asection *, bfd_vma); | |
0125cdf2 | 126 | static void warning_find_reloc |
1579bae1 | 127 | (bfd *, asection *, void *); |
0125cdf2 | 128 | static bfd_boolean undefined_symbol |
1579bae1 AM |
129 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
130 | bfd_boolean); | |
0125cdf2 | 131 | static bfd_boolean reloc_overflow |
dfeffb9f L |
132 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
133 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 134 | static bfd_boolean reloc_dangerous |
1579bae1 | 135 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 136 | static bfd_boolean unattached_reloc |
1579bae1 | 137 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 138 | static bfd_boolean notice |
35ed3f94 | 139 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
16d96b5b | 140 | bfd *, asection *, bfd_vma, flagword, const char *); |
0125cdf2 NC |
141 | |
142 | static struct bfd_link_callbacks link_callbacks = | |
143 | { | |
252b5132 RH |
144 | add_archive_element, |
145 | multiple_definition, | |
146 | multiple_common, | |
147 | add_to_set, | |
148 | constructor_callback, | |
149 | warning_callback, | |
150 | undefined_symbol, | |
151 | reloc_overflow, | |
152 | reloc_dangerous, | |
153 | unattached_reloc, | |
e1fffbe6 | 154 | notice, |
2889e75b | 155 | einfo, |
49fa1e15 AM |
156 | info_msg, |
157 | minfo, | |
2889e75b | 158 | ldlang_override_segment_assignment |
252b5132 RH |
159 | }; |
160 | ||
3b66a141 HPN |
161 | static bfd_assert_handler_type default_bfd_assert_handler; |
162 | ||
252b5132 RH |
163 | struct bfd_link_info link_info; |
164 | \f | |
165 | static void | |
498cd2a0 | 166 | ld_cleanup (void) |
252b5132 | 167 | { |
498cd2a0 AM |
168 | bfd_cache_close_all (); |
169 | #ifdef ENABLE_PLUGINS | |
170 | plugin_call_cleanup (); | |
171 | #endif | |
172 | if (output_filename && delete_output_file_on_failure) | |
173 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
174 | } |
175 | ||
3b66a141 HPN |
176 | /* If there's a BFD assertion, we'll notice and exit with an error |
177 | unless otherwise instructed. */ | |
178 | ||
179 | static void | |
180 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, | |
181 | const char *file, int line) | |
182 | { | |
183 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); | |
184 | config.make_executable = FALSE; | |
185 | } | |
186 | ||
252b5132 | 187 | int |
1579bae1 | 188 | main (int argc, char **argv) |
252b5132 RH |
189 | { |
190 | char *emulation; | |
191 | long start_time = get_run_time (); | |
24a09713 SB |
192 | #ifdef HAVE_SBRK |
193 | char *start_sbrk = (char *) sbrk (0); | |
194 | #endif | |
252b5132 RH |
195 | |
196 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
197 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
198 | #endif |
199 | #if defined (HAVE_SETLOCALE) | |
200 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
201 | #endif |
202 | bindtextdomain (PACKAGE, LOCALEDIR); | |
203 | textdomain (PACKAGE); | |
204 | ||
205 | program_name = argv[0]; | |
206 | xmalloc_set_program_name (program_name); | |
207 | ||
208 | START_PROGRESS (program_name, 0); | |
209 | ||
869b9d07 MM |
210 | expandargv (&argc, &argv); |
211 | ||
252b5132 RH |
212 | bfd_init (); |
213 | ||
214 | bfd_set_error_program_name (program_name); | |
215 | ||
3b66a141 HPN |
216 | /* We want to notice and fail on those nasty BFD assertions which are |
217 | likely to signal incorrect output being generated but otherwise may | |
218 | leave no trace. */ | |
219 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); | |
220 | ||
498cd2a0 | 221 | xatexit (ld_cleanup); |
252b5132 | 222 | |
e2243057 RS |
223 | /* Set up the sysroot directory. */ |
224 | ld_sysroot = get_sysroot (argc, argv); | |
225 | if (*ld_sysroot) | |
9c8ebd6a | 226 | { |
e2243057 | 227 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 228 | { |
70487fb2 | 229 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 230 | ld_sysroot = ""; |
0125cdf2 | 231 | } |
e2243057 RS |
232 | else |
233 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 234 | } |
3fe38064 NC |
235 | if (ld_canon_sysroot) |
236 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
237 | else | |
238 | ld_canon_sysroot_len = -1; | |
239 | ||
252b5132 RH |
240 | /* Set the default BFD target based on the configured target. Doing |
241 | this permits the linker to be configured for a particular target, | |
242 | and linked against a shared BFD library which was configured for | |
243 | a different target. The macro TARGET is defined by Makefile. */ | |
244 | if (! bfd_set_default_target (TARGET)) | |
245 | { | |
246 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
247 | xexit (1); | |
248 | } | |
249 | ||
b47c4208 AM |
250 | #if YYDEBUG |
251 | { | |
252 | extern int yydebug; | |
253 | yydebug = 1; | |
254 | } | |
255 | #endif | |
256 | ||
b34976b6 | 257 | config.build_constructors = TRUE; |
c76308d2 | 258 | config.rpath_separator = ':'; |
a854a4a7 AM |
259 | config.split_by_reloc = (unsigned) -1; |
260 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
261 | config.make_executable = TRUE; |
262 | config.magic_demand_paged = TRUE; | |
263 | config.text_read_only = TRUE; | |
4f9d22a0 | 264 | link_info.disable_target_specific_optimizations = -1; |
3b95049e | 265 | |
b34976b6 | 266 | command_line.warn_mismatch = TRUE; |
fe7929ce | 267 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 268 | command_line.check_section_addresses = -1; |
bcaa7b3e | 269 | |
252b5132 RH |
270 | /* We initialize DEMANGLING based on the environment variable |
271 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
272 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
273 | environment. Acting the same way here lets us provide the same | |
274 | interface by default. */ | |
275 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
276 | ||
b34976b6 | 277 | link_info.allow_undefined_version = TRUE; |
b5067602 | 278 | link_info.keep_memory = TRUE; |
b5067602 | 279 | link_info.combreloc = TRUE; |
d5cd3933 | 280 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 281 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
282 | link_info.callbacks = &link_callbacks; |
283 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
284 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
285 | and _fini symbols. We are compatible. */ | |
286 | link_info.init_function = "_init"; | |
287 | link_info.fini_function = "_fini"; | |
a9a4c53e | 288 | link_info.relax_pass = 1; |
e0076ab3 | 289 | link_info.pei386_auto_import = -1; |
db6751f2 | 290 | link_info.spare_dynamic_tags = 5; |
967928e9 | 291 | link_info.path_separator = ':'; |
24718e3b | 292 | |
252b5132 | 293 | ldfile_add_arch (""); |
252b5132 RH |
294 | emulation = get_emulation (argc, argv); |
295 | ldemul_choose_mode (emulation); | |
742aeb63 | 296 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
297 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
298 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 RH |
299 | lang_init (); |
300 | ldemul_before_parse (); | |
b34976b6 | 301 | lang_has_input_file = FALSE; |
252b5132 RH |
302 | parse_args (argc, argv); |
303 | ||
2d643429 NC |
304 | if (config.hash_table_size != 0) |
305 | bfd_hash_set_default_size (config.hash_table_size); | |
306 | ||
9bbc1a67 AM |
307 | #ifdef ENABLE_PLUGINS |
308 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
d82184d7 | 309 | plugin_load_plugins (); |
9bbc1a67 | 310 | #endif /* ENABLE_PLUGINS */ |
36af4a4e | 311 | |
9bbc1a67 | 312 | ldemul_set_symbols (); |
252b5132 | 313 | |
14be8564 L |
314 | /* If we have not already opened and parsed a linker script, |
315 | try the default script from command line first. */ | |
316 | if (saved_script_handle == NULL | |
317 | && command_line.default_script != NULL) | |
318 | { | |
319 | ldfile_open_command_file (command_line.default_script); | |
320 | parser_input = input_script; | |
321 | yyparse (); | |
322 | } | |
323 | ||
b9a8de1e NC |
324 | /* If we have not already opened and parsed a linker script |
325 | read the emulation's appropriate default script. */ | |
b90e1c6f | 326 | if (saved_script_handle == NULL) |
252b5132 | 327 | { |
252b5132 | 328 | int isfile; |
b7a26f91 | 329 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
330 | |
331 | if (isfile) | |
7d24f02c | 332 | ldfile_open_default_command_file (s); |
252b5132 | 333 | else |
b7a26f91 | 334 | { |
252b5132 | 335 | lex_string = s; |
dab69f68 | 336 | lex_redirect (s, _("built in linker script"), 1); |
252b5132 RH |
337 | } |
338 | parser_input = input_script; | |
339 | yyparse (); | |
340 | lex_string = NULL; | |
341 | } | |
342 | ||
cd6f1cf3 | 343 | if (verbose) |
b9a8de1e | 344 | { |
9cb61eab AM |
345 | if (saved_script_handle) |
346 | info_msg (_("using external linker script:")); | |
347 | else | |
348 | info_msg (_("using internal linker script:")); | |
349 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
350 | |
351 | if (saved_script_handle) | |
352 | { | |
74699268 | 353 | static const int ld_bufsz = 8193; |
b9a8de1e | 354 | size_t n; |
1e9cc1c2 | 355 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
356 | |
357 | rewind (saved_script_handle); | |
74699268 | 358 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 359 | { |
b7a26f91 | 360 | buf[n] = 0; |
b9a8de1e NC |
361 | info_msg (buf); |
362 | } | |
363 | rewind (saved_script_handle); | |
364 | free (buf); | |
365 | } | |
366 | else | |
367 | { | |
368 | int isfile; | |
369 | ||
b7a26f91 | 370 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 371 | } |
b7a26f91 | 372 | |
b9a8de1e NC |
373 | info_msg ("\n==================================================\n"); |
374 | } | |
375 | ||
30824704 RM |
376 | if (command_line.print_output_format) |
377 | info_msg ("%s\n", lang_get_output_target ()); | |
378 | ||
252b5132 RH |
379 | lang_final (); |
380 | ||
61e2488c JT |
381 | /* If the only command line argument has been -v or --version or --verbose |
382 | then ignore any input files provided by linker scripts and exit now. | |
383 | We do not want to create an output file when the linker is just invoked | |
384 | to provide version information. */ | |
385 | if (argc == 2 && version_printed) | |
386 | xexit (0); | |
387 | ||
b34976b6 | 388 | if (!lang_has_input_file) |
252b5132 | 389 | { |
30824704 | 390 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
391 | xexit (0); |
392 | einfo (_("%P%F: no input files\n")); | |
393 | } | |
394 | ||
395 | if (trace_files) | |
0125cdf2 | 396 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
397 | |
398 | ldemul_after_parse (); | |
399 | ||
252b5132 RH |
400 | if (config.map_filename) |
401 | { | |
402 | if (strcmp (config.map_filename, "-") == 0) | |
403 | { | |
404 | config.map_file = stdout; | |
405 | } | |
406 | else | |
407 | { | |
408 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
409 | if (config.map_file == (FILE *) NULL) | |
410 | { | |
411 | bfd_set_error (bfd_error_system_call); | |
412 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
413 | config.map_filename); | |
414 | } | |
415 | } | |
416 | } | |
417 | ||
252b5132 RH |
418 | lang_process (); |
419 | ||
420 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 421 | symbols, and possibly multiple definitions. */ |
1049f94e | 422 | if (link_info.relocatable) |
f13a99db | 423 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 424 | else |
f13a99db | 425 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
426 | |
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 (); | |
edf84efc NC |
435 | #if 0 |
436 | { | |
437 | struct bfd_link_hash_entry * h; | |
252b5132 | 438 | |
edf84efc NC |
439 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
440 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); | |
441 | } | |
442 | #endif | |
750877ba L |
443 | lang_finish (); |
444 | ||
1049f94e | 445 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 446 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 447 | want to ignore for relocatable output?) */ |
b34976b6 | 448 | if (!config.make_executable && !force_make_executable) |
252b5132 | 449 | { |
b34976b6 | 450 | if (trace_files) |
0125cdf2 NC |
451 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
452 | output_filename); | |
252b5132 | 453 | |
4309cbf2 | 454 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
455 | xexit (1); |
456 | } | |
457 | else | |
458 | { | |
f13a99db AM |
459 | if (! bfd_close (link_info.output_bfd)) |
460 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
461 | |
462 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
463 | executable file and it doesn't end in .exe, copy it to one |
464 | which does. */ | |
1049f94e | 465 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
466 | { |
467 | int len = strlen (output_filename); | |
0125cdf2 | 468 | |
6d5e62f8 | 469 | if (len < 4 |
252b5132 RH |
470 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
471 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
472 | { | |
473 | FILE *src; | |
474 | FILE *dst; | |
475 | const int bsize = 4096; | |
1e9cc1c2 | 476 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 477 | int l; |
1e9cc1c2 | 478 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 479 | |
252b5132 RH |
480 | strcpy (dst_name, output_filename); |
481 | strcat (dst_name, ".exe"); | |
482 | src = fopen (output_filename, FOPEN_RB); | |
483 | dst = fopen (dst_name, FOPEN_WB); | |
484 | ||
485 | if (!src) | |
1579bae1 AM |
486 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
487 | output_filename); | |
252b5132 | 488 | if (!dst) |
1579bae1 AM |
489 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
490 | dst_name); | |
252b5132 RH |
491 | while ((l = fread (buf, 1, bsize, src)) > 0) |
492 | { | |
493 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 494 | |
252b5132 | 495 | if (done != l) |
0125cdf2 | 496 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 497 | } |
0125cdf2 | 498 | |
252b5132 RH |
499 | fclose (src); |
500 | if (fclose (dst) == EOF) | |
0125cdf2 | 501 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
502 | free (dst_name); |
503 | free (buf); | |
504 | } | |
505 | } | |
506 | } | |
507 | ||
508 | END_PROGRESS (program_name); | |
509 | ||
510 | if (config.stats) | |
511 | { | |
512 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 513 | char *lim = (char *) sbrk (0); |
252b5132 RH |
514 | #endif |
515 | long run_time = get_run_time () - start_time; | |
516 | ||
e922bcab | 517 | fflush (stdout); |
252b5132 RH |
518 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
519 | program_name, run_time / 1000000, run_time % 1000000); | |
520 | #ifdef HAVE_SBRK | |
521 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
24a09713 | 522 | (long) (lim - start_sbrk)); |
252b5132 | 523 | #endif |
e922bcab | 524 | fflush (stderr); |
252b5132 RH |
525 | } |
526 | ||
4309cbf2 | 527 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
528 | output_filename = NULL; |
529 | ||
530 | xexit (0); | |
531 | return 0; | |
532 | } | |
533 | ||
e2243057 RS |
534 | /* If the configured sysroot is relocatable, try relocating it based on |
535 | default prefix FROM. Return the relocated directory if it exists, | |
536 | otherwise return null. */ | |
537 | ||
538 | static char * | |
539 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
540 | { | |
541 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
542 | char *path; | |
543 | struct stat s; | |
544 | ||
545 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
546 | if (path) | |
547 | { | |
548 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
549 | return path; | |
550 | free (path); | |
551 | } | |
552 | #endif | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
557 | ||
558 | static const char * | |
559 | get_sysroot (int argc, char **argv) | |
560 | { | |
561 | int i; | |
562 | const char *path; | |
563 | ||
564 | for (i = 1; i < argc; i++) | |
0112cd26 | 565 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
566 | return argv[i] + strlen ("--sysroot="); |
567 | ||
568 | path = get_relative_sysroot (BINDIR); | |
569 | if (path) | |
570 | return path; | |
571 | ||
572 | path = get_relative_sysroot (TOOLBINDIR); | |
573 | if (path) | |
574 | return path; | |
575 | ||
576 | return TARGET_SYSTEM_ROOT; | |
577 | } | |
578 | ||
252b5132 RH |
579 | /* We need to find any explicitly given emulation in order to initialize the |
580 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
581 | ||
582 | static char * | |
1579bae1 | 583 | get_emulation (int argc, char **argv) |
252b5132 RH |
584 | { |
585 | char *emulation; | |
586 | int i; | |
587 | ||
588 | emulation = getenv (EMULATION_ENVIRON); | |
589 | if (emulation == NULL) | |
590 | emulation = DEFAULT_EMULATION; | |
591 | ||
592 | for (i = 1; i < argc; i++) | |
593 | { | |
0112cd26 | 594 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
595 | { |
596 | if (argv[i][2] == '\0') | |
597 | { | |
598 | /* -m EMUL */ | |
599 | if (i < argc - 1) | |
600 | { | |
601 | emulation = argv[i + 1]; | |
602 | i++; | |
603 | } | |
604 | else | |
0125cdf2 | 605 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
606 | } |
607 | else if (strcmp (argv[i], "-mips1") == 0 | |
608 | || strcmp (argv[i], "-mips2") == 0 | |
609 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 610 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
611 | || strcmp (argv[i], "-mips5") == 0 |
612 | || strcmp (argv[i], "-mips32") == 0 | |
613 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
614 | || strcmp (argv[i], "-mips64") == 0 |
615 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 616 | { |
31d677f9 | 617 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
618 | passed to the linker by some MIPS compilers. They |
619 | generally tell the linker to use a slightly different | |
620 | library path. Perhaps someday these should be | |
621 | implemented as emulations; until then, we just ignore | |
622 | the arguments and hope that nobody ever creates | |
623 | emulations named ips1, ips2 or ips3. */ | |
624 | } | |
625 | else if (strcmp (argv[i], "-m486") == 0) | |
626 | { | |
627 | /* FIXME: The argument -m486 is passed to the linker on | |
628 | some Linux systems. Hope that nobody creates an | |
629 | emulation named 486. */ | |
630 | } | |
631 | else | |
632 | { | |
633 | /* -mEMUL */ | |
634 | emulation = &argv[i][2]; | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | return emulation; | |
640 | } | |
641 | ||
252b5132 | 642 | void |
1579bae1 | 643 | add_ysym (const char *name) |
252b5132 | 644 | { |
1579bae1 | 645 | if (link_info.notice_hash == NULL) |
252b5132 | 646 | { |
1e9cc1c2 NC |
647 | link_info.notice_hash = |
648 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
649 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
650 | bfd_hash_newfunc, | |
651 | sizeof (struct bfd_hash_entry), | |
652 | 61)) | |
252b5132 | 653 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 654 | } |
252b5132 | 655 | |
1579bae1 | 656 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
657 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
658 | } | |
659 | ||
0e86e20e AM |
660 | void |
661 | add_ignoresym (struct bfd_link_info *info, const char *name) | |
662 | { | |
663 | if (info->ignore_hash == NULL) | |
664 | { | |
665 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); | |
666 | if (! bfd_hash_table_init_n (info->ignore_hash, | |
667 | bfd_hash_newfunc, | |
668 | sizeof (struct bfd_hash_entry), | |
669 | 61)) | |
670 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
671 | } | |
672 | ||
673 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) | |
674 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
675 | } | |
676 | ||
252b5132 RH |
677 | /* Record a symbol to be wrapped, from the --wrap option. */ |
678 | ||
679 | void | |
1579bae1 | 680 | add_wrap (const char *name) |
252b5132 RH |
681 | { |
682 | if (link_info.wrap_hash == NULL) | |
683 | { | |
1e9cc1c2 NC |
684 | link_info.wrap_hash = |
685 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
686 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
687 | bfd_hash_newfunc, | |
688 | sizeof (struct bfd_hash_entry), | |
689 | 61)) | |
252b5132 RH |
690 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
691 | } | |
0125cdf2 | 692 | |
b34976b6 | 693 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
694 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
695 | } | |
696 | ||
697 | /* Handle the -retain-symbols-file option. */ | |
698 | ||
699 | void | |
1579bae1 | 700 | add_keepsyms_file (const char *filename) |
252b5132 RH |
701 | { |
702 | FILE *file; | |
703 | char *buf; | |
704 | size_t bufsize; | |
705 | int c; | |
706 | ||
707 | if (link_info.strip == strip_some) | |
708 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
709 | ||
710 | file = fopen (filename, "r"); | |
1579bae1 | 711 | if (file == NULL) |
252b5132 RH |
712 | { |
713 | bfd_set_error (bfd_error_system_call); | |
714 | einfo ("%X%P: %s: %E\n", filename); | |
715 | return; | |
716 | } | |
717 | ||
1e9cc1c2 NC |
718 | link_info.keep_hash = (struct bfd_hash_table *) |
719 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
720 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
721 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
722 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
723 | ||
724 | bufsize = 100; | |
1e9cc1c2 | 725 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
726 | |
727 | c = getc (file); | |
728 | while (c != EOF) | |
729 | { | |
3882b010 | 730 | while (ISSPACE (c)) |
252b5132 RH |
731 | c = getc (file); |
732 | ||
733 | if (c != EOF) | |
734 | { | |
735 | size_t len = 0; | |
736 | ||
3882b010 | 737 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
738 | { |
739 | buf[len] = c; | |
740 | ++len; | |
741 | if (len >= bufsize) | |
742 | { | |
743 | bufsize *= 2; | |
1e9cc1c2 | 744 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
745 | } |
746 | c = getc (file); | |
747 | } | |
748 | ||
749 | buf[len] = '\0'; | |
750 | ||
1579bae1 | 751 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
752 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
753 | } | |
754 | } | |
755 | ||
756 | if (link_info.strip != strip_none) | |
757 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
758 | ||
5ed6aba4 | 759 | free (buf); |
252b5132 | 760 | link_info.strip = strip_some; |
d9313f4f | 761 | fclose (file); |
252b5132 RH |
762 | } |
763 | \f | |
764 | /* Callbacks from the BFD linker routines. */ | |
765 | ||
766 | /* This is called when BFD has decided to include an archive member in | |
767 | a link. */ | |
768 | ||
b34976b6 | 769 | static bfd_boolean |
e1fffbe6 | 770 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 771 | bfd *abfd, |
5d3236ee DK |
772 | const char *name, |
773 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
774 | { |
775 | lang_input_statement_type *input; | |
5d3236ee | 776 | lang_input_statement_type orig_input; |
252b5132 | 777 | |
1e9cc1c2 NC |
778 | input = (lang_input_statement_type *) |
779 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
780 | input->filename = abfd->filename; |
781 | input->local_sym_name = abfd->filename; | |
782 | input->the_bfd = abfd; | |
252b5132 | 783 | |
5d3236ee DK |
784 | /* Save the original data for trace files/tries below, as plugins |
785 | (if enabled) may possibly alter it to point to a replacement | |
786 | BFD, but we still want to output the original BFD filename. */ | |
787 | orig_input = *input; | |
788 | #ifdef ENABLE_PLUGINS | |
2b7e4308 | 789 | if (plugin_active_plugins_p () && !no_more_claiming) |
5d3236ee DK |
790 | { |
791 | /* We must offer this archive member to the plugins to claim. */ | |
2b7e4308 L |
792 | const char *filename = (bfd_my_archive (abfd) != NULL |
793 | ? bfd_my_archive (abfd)->filename : abfd->filename); | |
794 | int fd = open (filename, O_RDONLY | O_BINARY); | |
5d3236ee DK |
795 | if (fd >= 0) |
796 | { | |
797 | struct ld_plugin_input_file file; | |
02d00247 | 798 | |
5d3236ee DK |
799 | /* Offset and filesize must refer to the individual archive |
800 | member, not the whole file, and must exclude the header. | |
801 | Fortunately for us, that is how the data is stored in the | |
802 | origin field of the bfd and in the arelt_data. */ | |
2b7e4308 | 803 | file.name = filename; |
5d3236ee DK |
804 | file.offset = abfd->origin; |
805 | file.filesize = arelt_size (abfd); | |
806 | file.fd = fd; | |
02d00247 | 807 | plugin_maybe_claim (&file, input); |
66be1055 | 808 | if (input->flags.claimed) |
5d3236ee | 809 | { |
66be1055 | 810 | input->flags.claim_archive = TRUE; |
5d3236ee DK |
811 | *subsbfd = input->the_bfd; |
812 | } | |
5d3236ee DK |
813 | } |
814 | } | |
815 | #endif /* ENABLE_PLUGINS */ | |
816 | ||
252b5132 RH |
817 | ldlang_add_file (input); |
818 | ||
1579bae1 | 819 | if (config.map_file != NULL) |
252b5132 | 820 | { |
b34976b6 | 821 | static bfd_boolean header_printed; |
252b5132 RH |
822 | struct bfd_link_hash_entry *h; |
823 | bfd *from; | |
824 | int len; | |
825 | ||
e1fffbe6 | 826 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
827 | |
828 | if (h == NULL) | |
829 | from = NULL; | |
830 | else | |
831 | { | |
832 | switch (h->type) | |
833 | { | |
834 | default: | |
835 | from = NULL; | |
836 | break; | |
837 | ||
838 | case bfd_link_hash_defined: | |
839 | case bfd_link_hash_defweak: | |
840 | from = h->u.def.section->owner; | |
841 | break; | |
842 | ||
843 | case bfd_link_hash_undefined: | |
844 | case bfd_link_hash_undefweak: | |
845 | from = h->u.undef.abfd; | |
846 | break; | |
847 | ||
848 | case bfd_link_hash_common: | |
849 | from = h->u.c.p->section->owner; | |
850 | break; | |
851 | } | |
852 | } | |
853 | ||
854 | if (! header_printed) | |
855 | { | |
856 | char buf[100]; | |
857 | ||
16e4ecc0 AM |
858 | sprintf (buf, _("Archive member included " |
859 | "to satisfy reference by file (symbol)\n\n")); | |
252b5132 | 860 | minfo ("%s", buf); |
b34976b6 | 861 | header_printed = TRUE; |
252b5132 RH |
862 | } |
863 | ||
864 | if (bfd_my_archive (abfd) == NULL) | |
865 | { | |
866 | minfo ("%s", bfd_get_filename (abfd)); | |
867 | len = strlen (bfd_get_filename (abfd)); | |
868 | } | |
869 | else | |
870 | { | |
871 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
872 | bfd_get_filename (abfd)); | |
873 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
874 | + strlen (bfd_get_filename (abfd)) | |
875 | + 2); | |
876 | } | |
877 | ||
878 | if (len >= 29) | |
879 | { | |
880 | print_nl (); | |
881 | len = 0; | |
882 | } | |
883 | while (len < 30) | |
884 | { | |
885 | print_space (); | |
886 | ++len; | |
887 | } | |
888 | ||
889 | if (from != NULL) | |
890 | minfo ("%B ", from); | |
891 | if (h != NULL) | |
892 | minfo ("(%T)\n", h->root.string); | |
893 | else | |
894 | minfo ("(%s)\n", name); | |
895 | } | |
896 | ||
cd6f1cf3 | 897 | if (trace_files || verbose) |
5d3236ee | 898 | info_msg ("%I\n", &orig_input); |
b34976b6 | 899 | return TRUE; |
252b5132 RH |
900 | } |
901 | ||
902 | /* This is called when BFD has discovered a symbol which is defined | |
903 | multiple times. */ | |
904 | ||
b34976b6 | 905 | static bfd_boolean |
24f58f47 AM |
906 | multiple_definition (struct bfd_link_info *info, |
907 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
908 | bfd *nbfd, |
909 | asection *nsec, | |
910 | bfd_vma nval) | |
252b5132 | 911 | { |
24f58f47 AM |
912 | const char *name; |
913 | bfd *obfd; | |
914 | asection *osec; | |
915 | bfd_vma oval; | |
916 | ||
917 | if (info->allow_multiple_definition) | |
918 | return TRUE; | |
919 | ||
920 | switch (h->type) | |
921 | { | |
922 | case bfd_link_hash_defined: | |
923 | osec = h->u.def.section; | |
924 | oval = h->u.def.value; | |
925 | obfd = h->u.def.section->owner; | |
926 | break; | |
927 | case bfd_link_hash_indirect: | |
928 | osec = bfd_ind_section_ptr; | |
929 | oval = 0; | |
930 | obfd = NULL; | |
931 | break; | |
932 | default: | |
933 | abort (); | |
934 | } | |
935 | ||
936 | /* Ignore a redefinition of an absolute symbol to the | |
937 | same value; it's harmless. */ | |
938 | if (h->type == bfd_link_hash_defined | |
939 | && bfd_is_abs_section (osec) | |
940 | && bfd_is_abs_section (nsec) | |
941 | && nval == oval) | |
942 | return TRUE; | |
943 | ||
252b5132 RH |
944 | /* If either section has the output_section field set to |
945 | bfd_abs_section_ptr, it means that the section is being | |
946 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
947 | FIXME: It would be cleaner to somehow ignore symbols defined in |
948 | sections which are being discarded. */ | |
252b5132 RH |
949 | if ((osec->output_section != NULL |
950 | && ! bfd_is_abs_section (osec) | |
951 | && bfd_is_abs_section (osec->output_section)) | |
952 | || (nsec->output_section != NULL | |
953 | && ! bfd_is_abs_section (nsec) | |
954 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 955 | return TRUE; |
252b5132 | 956 | |
24f58f47 AM |
957 | name = h->root.string; |
958 | if (nbfd == NULL) | |
959 | { | |
960 | nbfd = obfd; | |
961 | nsec = osec; | |
962 | nval = oval; | |
963 | obfd = NULL; | |
964 | } | |
252b5132 RH |
965 | einfo (_("%X%C: multiple definition of `%T'\n"), |
966 | nbfd, nsec, nval, name); | |
1579bae1 | 967 | if (obfd != NULL) |
252b5132 | 968 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 969 | |
13761a11 | 970 | if (RELAXATION_ENABLED_BY_USER) |
9b14b192 NC |
971 | { |
972 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
13761a11 | 973 | DISABLE_RELAXATION; |
9b14b192 | 974 | } |
6d5e62f8 | 975 | |
b34976b6 | 976 | return TRUE; |
252b5132 RH |
977 | } |
978 | ||
979 | /* This is called when there is a definition of a common symbol, or | |
980 | when a common symbol is found for a symbol that is already defined, | |
981 | or when two common symbols are found. We only do something if | |
982 | -warn-common was used. */ | |
983 | ||
b34976b6 | 984 | static bfd_boolean |
1579bae1 | 985 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 986 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
987 | bfd *nbfd, |
988 | enum bfd_link_hash_type ntype, | |
989 | bfd_vma nsize) | |
252b5132 | 990 | { |
24f58f47 AM |
991 | const char *name; |
992 | bfd *obfd; | |
993 | enum bfd_link_hash_type otype; | |
994 | bfd_vma osize; | |
995 | ||
996 | if (!config.warn_common) | |
b34976b6 | 997 | return TRUE; |
252b5132 | 998 | |
24f58f47 AM |
999 | name = h->root.string; |
1000 | otype = h->type; | |
1001 | if (otype == bfd_link_hash_common) | |
1002 | { | |
1003 | obfd = h->u.c.p->section->owner; | |
1004 | osize = h->u.c.size; | |
1005 | } | |
1006 | else if (otype == bfd_link_hash_defined | |
1007 | || otype == bfd_link_hash_defweak) | |
1008 | { | |
1009 | obfd = h->u.def.section->owner; | |
1010 | osize = 0; | |
1011 | } | |
1012 | else | |
1013 | { | |
1014 | /* FIXME: It would nice if we could report the BFD which defined | |
1015 | an indirect symbol, but we don't have anywhere to store the | |
1016 | information. */ | |
1017 | obfd = NULL; | |
1018 | osize = 0; | |
1019 | } | |
1020 | ||
252b5132 RH |
1021 | if (ntype == bfd_link_hash_defined |
1022 | || ntype == bfd_link_hash_defweak | |
1023 | || ntype == bfd_link_hash_indirect) | |
1024 | { | |
1025 | ASSERT (otype == bfd_link_hash_common); | |
1026 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1027 | nbfd, name); | |
1028 | if (obfd != NULL) | |
1029 | einfo (_("%B: warning: common is here\n"), obfd); | |
1030 | } | |
1031 | else if (otype == bfd_link_hash_defined | |
1032 | || otype == bfd_link_hash_defweak | |
1033 | || otype == bfd_link_hash_indirect) | |
1034 | { | |
1035 | ASSERT (ntype == bfd_link_hash_common); | |
1036 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1037 | nbfd, name); | |
1038 | if (obfd != NULL) | |
1039 | einfo (_("%B: warning: defined here\n"), obfd); | |
1040 | } | |
1041 | else | |
1042 | { | |
1043 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1044 | if (osize > nsize) | |
1045 | { | |
1046 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1047 | nbfd, name); | |
1048 | if (obfd != NULL) | |
1049 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1050 | } | |
1051 | else if (nsize > osize) | |
1052 | { | |
1053 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1054 | nbfd, name); | |
1055 | if (obfd != NULL) | |
1056 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1057 | } | |
1058 | else | |
1059 | { | |
1060 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1061 | if (obfd != NULL) | |
1062 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1063 | } | |
1064 | } | |
1065 | ||
b34976b6 | 1066 | return TRUE; |
252b5132 RH |
1067 | } |
1068 | ||
1069 | /* This is called when BFD has discovered a set element. H is the | |
1070 | entry in the linker hash table for the set. SECTION and VALUE | |
1071 | represent a value which should be added to the set. */ | |
1072 | ||
b34976b6 | 1073 | static bfd_boolean |
1579bae1 AM |
1074 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1075 | struct bfd_link_hash_entry *h, | |
1076 | bfd_reloc_code_real_type reloc, | |
1077 | bfd *abfd, | |
1078 | asection *section, | |
1079 | bfd_vma value) | |
252b5132 RH |
1080 | { |
1081 | if (config.warn_constructors) | |
1082 | einfo (_("%P: warning: global constructor %s used\n"), | |
1083 | h->root.string); | |
1084 | ||
1085 | if (! config.build_constructors) | |
b34976b6 | 1086 | return TRUE; |
252b5132 | 1087 | |
1579bae1 | 1088 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1089 | |
1090 | if (h->type == bfd_link_hash_new) | |
1091 | { | |
1092 | h->type = bfd_link_hash_undefined; | |
1093 | h->u.undef.abfd = abfd; | |
1094 | /* We don't call bfd_link_add_undef to add this to the list of | |
1095 | undefined symbols because we are going to define it | |
1096 | ourselves. */ | |
1097 | } | |
1098 | ||
b34976b6 | 1099 | return TRUE; |
252b5132 RH |
1100 | } |
1101 | ||
1102 | /* This is called when BFD has discovered a constructor. This is only | |
1103 | called for some object file formats--those which do not handle | |
1104 | constructors in some more clever fashion. This is similar to | |
1105 | adding an element to a set, but less general. */ | |
1106 | ||
b34976b6 | 1107 | static bfd_boolean |
1579bae1 AM |
1108 | constructor_callback (struct bfd_link_info *info, |
1109 | bfd_boolean constructor, | |
1110 | const char *name, | |
1111 | bfd *abfd, | |
1112 | asection *section, | |
1113 | bfd_vma value) | |
252b5132 RH |
1114 | { |
1115 | char *s; | |
1116 | struct bfd_link_hash_entry *h; | |
1117 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1118 | ||
1119 | if (config.warn_constructors) | |
1120 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1121 | ||
1122 | if (! config.build_constructors) | |
b34976b6 | 1123 | return TRUE; |
252b5132 RH |
1124 | |
1125 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1126 | useful error message. */ | |
0e86e20e | 1127 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1128 | && (info->relocatable |
252b5132 RH |
1129 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1130 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1131 | ||
1132 | s = set_name; | |
1133 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1134 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1135 | if (constructor) | |
1136 | strcpy (s, "__CTOR_LIST__"); | |
1137 | else | |
1138 | strcpy (s, "__DTOR_LIST__"); | |
1139 | ||
b34976b6 | 1140 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1141 | if (h == (struct bfd_link_hash_entry *) NULL) |
1142 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1143 | if (h->type == bfd_link_hash_new) | |
1144 | { | |
1145 | h->type = bfd_link_hash_undefined; | |
1146 | h->u.undef.abfd = abfd; | |
1147 | /* We don't call bfd_link_add_undef to add this to the list of | |
1148 | undefined symbols because we are going to define it | |
1149 | ourselves. */ | |
1150 | } | |
1151 | ||
1152 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1153 | return TRUE; |
252b5132 RH |
1154 | } |
1155 | ||
1156 | /* A structure used by warning_callback to pass information through | |
1157 | bfd_map_over_sections. */ | |
1158 | ||
0125cdf2 NC |
1159 | struct warning_callback_info |
1160 | { | |
b34976b6 | 1161 | bfd_boolean found; |
252b5132 RH |
1162 | const char *warning; |
1163 | const char *symbol; | |
1164 | asymbol **asymbols; | |
1165 | }; | |
1166 | ||
4c6d802e L |
1167 | /* Look through the relocs to see if we can find a plausible address |
1168 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ | |
1169 | ||
1170 | static bfd_boolean | |
1171 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) | |
1172 | { | |
1173 | struct warning_callback_info cinfo; | |
1174 | ||
1175 | if (!bfd_generic_link_read_symbols (abfd)) | |
1176 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1177 | ||
1178 | cinfo.found = FALSE; | |
1179 | cinfo.warning = warning; | |
1180 | cinfo.symbol = symbol; | |
1181 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1182 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
1183 | return cinfo.found; | |
1184 | } | |
1185 | ||
252b5132 RH |
1186 | /* This is called when there is a reference to a warning symbol. */ |
1187 | ||
b34976b6 | 1188 | static bfd_boolean |
1579bae1 AM |
1189 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1190 | const char *warning, | |
1191 | const char *symbol, | |
1192 | bfd *abfd, | |
1193 | asection *section, | |
1194 | bfd_vma address) | |
252b5132 RH |
1195 | { |
1196 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1197 | have a cleaner interface, but what? */ | |
1198 | if (! config.warn_multiple_gp | |
1199 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1200 | return TRUE; |
252b5132 RH |
1201 | |
1202 | if (section != NULL) | |
300475fe | 1203 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1204 | else if (abfd == NULL) |
300475fe | 1205 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1206 | else if (symbol == NULL) |
300475fe | 1207 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
4c6d802e | 1208 | else if (! symbol_warning (warning, symbol, abfd)) |
252b5132 | 1209 | { |
4c6d802e L |
1210 | bfd *b; |
1211 | /* Search all input files for a reference to SYMBOL. */ | |
1212 | for (b = info->input_bfds; b; b = b->link_next) | |
1213 | if (b != abfd && symbol_warning (warning, symbol, b)) | |
1214 | return TRUE; | |
1215 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); | |
252b5132 RH |
1216 | } |
1217 | ||
b34976b6 | 1218 | return TRUE; |
252b5132 RH |
1219 | } |
1220 | ||
1221 | /* This is called by warning_callback for each section. It checks the | |
1222 | relocs of the section to see if it can find a reference to the | |
1223 | symbol which triggered the warning. If it can, it uses the reloc | |
1224 | to give an error message with a file and line number. */ | |
1225 | ||
1226 | static void | |
1579bae1 | 1227 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1228 | { |
1e9cc1c2 | 1229 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1230 | long relsize; |
1231 | arelent **relpp; | |
1232 | long relcount; | |
1233 | arelent **p, **pend; | |
1234 | ||
1235 | if (info->found) | |
1236 | return; | |
1237 | ||
1238 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1239 | if (relsize < 0) | |
1240 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1241 | if (relsize == 0) | |
1242 | return; | |
1243 | ||
1e9cc1c2 | 1244 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1245 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1246 | if (relcount < 0) | |
1247 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1248 | ||
1249 | p = relpp; | |
1250 | pend = p + relcount; | |
1251 | for (; p < pend && *p != NULL; p++) | |
1252 | { | |
1253 | arelent *q = *p; | |
1254 | ||
1255 | if (q->sym_ptr_ptr != NULL | |
1256 | && *q->sym_ptr_ptr != NULL | |
1257 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1258 | { | |
1259 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1260 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1261 | info->warning); | |
b34976b6 | 1262 | info->found = TRUE; |
252b5132 RH |
1263 | break; |
1264 | } | |
1265 | } | |
1266 | ||
1267 | free (relpp); | |
1268 | } | |
1269 | ||
1270 | /* This is called when an undefined symbol is found. */ | |
1271 | ||
b34976b6 | 1272 | static bfd_boolean |
0e86e20e | 1273 | undefined_symbol (struct bfd_link_info *info, |
1579bae1 AM |
1274 | const char *name, |
1275 | bfd *abfd, | |
1276 | asection *section, | |
1277 | bfd_vma address, | |
0b28295d | 1278 | bfd_boolean error) |
252b5132 RH |
1279 | { |
1280 | static char *error_name; | |
1281 | static unsigned int error_count; | |
1282 | ||
1283 | #define MAX_ERRORS_IN_A_ROW 5 | |
1284 | ||
0e86e20e AM |
1285 | if (info->ignore_hash != NULL |
1286 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) | |
1287 | return TRUE; | |
1288 | ||
252b5132 RH |
1289 | if (config.warn_once) |
1290 | { | |
252b5132 | 1291 | /* Only warn once about a particular undefined symbol. */ |
0e86e20e | 1292 | add_ignoresym (info, name); |
252b5132 RH |
1293 | } |
1294 | ||
1295 | /* We never print more than a reasonable number of errors in a row | |
1296 | for a single symbol. */ | |
1579bae1 | 1297 | if (error_name != NULL |
252b5132 RH |
1298 | && strcmp (name, error_name) == 0) |
1299 | ++error_count; | |
1300 | else | |
1301 | { | |
1302 | error_count = 0; | |
1579bae1 | 1303 | if (error_name != NULL) |
252b5132 | 1304 | free (error_name); |
d1b2b2dc | 1305 | error_name = xstrdup (name); |
252b5132 RH |
1306 | } |
1307 | ||
1308 | if (section != NULL) | |
1309 | { | |
1310 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1311 | { |
0b28295d ILT |
1312 | if (error) |
1313 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1314 | abfd, section, address, name); | |
1315 | else | |
1316 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1317 | abfd, section, address, name); | |
b6f29aaa | 1318 | } |
252b5132 | 1319 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1320 | { |
1321 | if (error) | |
1322 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1323 | abfd, section, address, name); | |
1324 | else | |
1325 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1326 | abfd, section, address, name); | |
1327 | } | |
1328 | else if (error) | |
1329 | einfo ("%X"); | |
252b5132 RH |
1330 | } |
1331 | else | |
1332 | { | |
1333 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1334 | { |
0b28295d ILT |
1335 | if (error) |
1336 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1337 | abfd, name); | |
1338 | else | |
1339 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1340 | abfd, name); | |
b6f29aaa | 1341 | } |
252b5132 | 1342 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1343 | { |
1344 | if (error) | |
1345 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1346 | abfd, name); | |
1347 | else | |
1348 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1349 | abfd, name); | |
1350 | } | |
1351 | else if (error) | |
1352 | einfo ("%X"); | |
252b5132 RH |
1353 | } |
1354 | ||
b34976b6 | 1355 | return TRUE; |
252b5132 RH |
1356 | } |
1357 | ||
8aae64e6 AO |
1358 | /* Counter to limit the number of relocation overflow error messages |
1359 | to print. Errors are printed as it is decremented. When it's | |
1360 | called and the counter is zero, a final message is printed | |
1361 | indicating more relocations were omitted. When it gets to -1, no | |
1362 | such errors are printed. If it's initially set to a value less | |
1363 | than -1, all such errors will be printed (--verbose does this). */ | |
1364 | ||
1365 | int overflow_cutoff_limit = 10; | |
1366 | ||
252b5132 RH |
1367 | /* This is called when a reloc overflows. */ |
1368 | ||
b34976b6 | 1369 | static bfd_boolean |
0e86e20e | 1370 | reloc_overflow (struct bfd_link_info *info, |
dfeffb9f | 1371 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1372 | const char *name, |
1373 | const char *reloc_name, | |
1374 | bfd_vma addend, | |
1375 | bfd *abfd, | |
1376 | asection *section, | |
1377 | bfd_vma address) | |
252b5132 | 1378 | { |
8aae64e6 AO |
1379 | if (overflow_cutoff_limit == -1) |
1380 | return TRUE; | |
1381 | ||
270396f2 | 1382 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1383 | |
1384 | if (overflow_cutoff_limit >= 0 | |
1385 | && overflow_cutoff_limit-- == 0) | |
1386 | { | |
1387 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1388 | return TRUE; | |
1389 | } | |
1390 | ||
dfeffb9f L |
1391 | if (entry) |
1392 | { | |
1393 | while (entry->type == bfd_link_hash_indirect | |
1394 | || entry->type == bfd_link_hash_warning) | |
1395 | entry = entry->u.i.link; | |
1396 | switch (entry->type) | |
1397 | { | |
1398 | case bfd_link_hash_undefined: | |
1399 | case bfd_link_hash_undefweak: | |
1400 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1401 | reloc_name, entry->root.string); | |
1402 | break; | |
1403 | case bfd_link_hash_defined: | |
1404 | case bfd_link_hash_defweak: | |
1405 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1406 | reloc_name, entry->root.string, | |
a6e1b90f L |
1407 | entry->u.def.section, |
1408 | entry->u.def.section == bfd_abs_section_ptr | |
0e86e20e | 1409 | ? info->output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1410 | break; |
1411 | default: | |
1412 | abort (); | |
1413 | break; | |
1414 | } | |
1415 | } | |
1416 | else | |
1417 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1418 | reloc_name, name); | |
252b5132 RH |
1419 | if (addend != 0) |
1420 | einfo ("+%v", addend); | |
1421 | einfo ("\n"); | |
b34976b6 | 1422 | return TRUE; |
252b5132 RH |
1423 | } |
1424 | ||
1425 | /* This is called when a dangerous relocation is made. */ | |
1426 | ||
b34976b6 | 1427 | static bfd_boolean |
1579bae1 AM |
1428 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1429 | const char *message, | |
1430 | bfd *abfd, | |
1431 | asection *section, | |
1432 | bfd_vma address) | |
252b5132 | 1433 | { |
270396f2 | 1434 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1435 | abfd, section, address, message); |
b34976b6 | 1436 | return TRUE; |
252b5132 RH |
1437 | } |
1438 | ||
1439 | /* This is called when a reloc is being generated attached to a symbol | |
1440 | that is not being output. */ | |
1441 | ||
b34976b6 | 1442 | static bfd_boolean |
1579bae1 AM |
1443 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1444 | const char *name, | |
1445 | bfd *abfd, | |
1446 | asection *section, | |
1447 | bfd_vma address) | |
252b5132 | 1448 | { |
270396f2 | 1449 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1450 | abfd, section, address, name); |
b34976b6 | 1451 | return TRUE; |
252b5132 RH |
1452 | } |
1453 | ||
1454 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1455 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1456 | using the -y option, while notice_all is set if the --cref option |
1457 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1458 | linker script; and if plugins are active, since they need to monitor | |
1459 | all references from non-IR files. */ | |
252b5132 | 1460 | |
b34976b6 | 1461 | static bfd_boolean |
1579bae1 | 1462 | notice (struct bfd_link_info *info, |
35ed3f94 | 1463 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1464 | bfd *abfd, |
1465 | asection *section, | |
16d96b5b AM |
1466 | bfd_vma value, |
1467 | flagword flags ATTRIBUTE_UNUSED, | |
1468 | const char *string ATTRIBUTE_UNUSED) | |
252b5132 | 1469 | { |
35ed3f94 AM |
1470 | const char *name; |
1471 | ||
1472 | if (h == NULL) | |
5061a885 AM |
1473 | { |
1474 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1475 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1476 | return TRUE; |
1477 | } | |
1478 | ||
35ed3f94 | 1479 | name = h->root.string; |
5d3236ee | 1480 | if (info->notice_hash != NULL |
9e2278f5 | 1481 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1482 | { |
1483 | if (bfd_is_und_section (section)) | |
1484 | einfo ("%B: reference to %s\n", abfd, name); | |
1485 | else | |
1486 | einfo ("%B: definition of %s\n", abfd, name); | |
1487 | } | |
1488 | ||
1489 | if (command_line.cref || nocrossref_list != NULL) | |
1490 | add_cref (name, abfd, section, value); | |
1491 | ||
b34976b6 | 1492 | return TRUE; |
252b5132 | 1493 | } |