Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
b90efa5b | 2 | Copyright (C) 1991-2015 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Steve Chamberlain steve@cygnus.com |
4 | ||
f96b4a7b | 5 | This file is part of the GNU Binutils. |
252b5132 | 6 | |
f96b4a7b | 7 | This program is free software; you can redistribute it and/or modify |
2fa9fc65 | 8 | it under the terms of the GNU General Public License as published by |
f96b4a7b NC |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
252b5132 | 11 | |
f96b4a7b | 12 | This program is distributed in the hope that it will be useful, |
2fa9fc65 NC |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
2fa9fc65 | 17 | You should have received a copy of the GNU General Public License |
f96b4a7b NC |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
3882b010 | 24 | #include "safe-ctype.h" |
252b5132 RH |
25 | #include "libiberty.h" |
26 | #include "progress.h" | |
27 | #include "bfdlink.h" | |
5af11cab | 28 | #include "filenames.h" |
252b5132 RH |
29 | |
30 | #include "ld.h" | |
31 | #include "ldmain.h" | |
32 | #include "ldmisc.h" | |
33 | #include "ldwrite.h" | |
252b5132 RH |
34 | #include "ldexp.h" |
35 | #include "ldlang.h" | |
df2a7313 | 36 | #include <ldgram.h> |
252b5132 RH |
37 | #include "ldlex.h" |
38 | #include "ldfile.h" | |
b71e2778 | 39 | #include "ldemul.h" |
252b5132 | 40 | #include "ldctor.h" |
5d3236ee DK |
41 | #ifdef ENABLE_PLUGINS |
42 | #include "plugin.h" | |
43 | #include "plugin-api.h" | |
5d3236ee | 44 | #endif /* ENABLE_PLUGINS */ |
252b5132 | 45 | |
0125cdf2 | 46 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
47 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
48 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
49 | #endif | |
50 | ||
51 | #include <string.h> | |
52 | ||
53 | #ifdef HAVE_SBRK | |
502bdb00 | 54 | #if !HAVE_DECL_SBRK |
1579bae1 | 55 | extern void *sbrk (); |
252b5132 RH |
56 | #endif |
57 | #endif | |
58 | ||
9c8ebd6a DJ |
59 | #ifndef TARGET_SYSTEM_ROOT |
60 | #define TARGET_SYSTEM_ROOT "" | |
61 | #endif | |
62 | ||
252b5132 RH |
63 | /* EXPORTS */ |
64 | ||
53d25da6 AM |
65 | FILE *saved_script_handle = NULL; |
66 | FILE *previous_script_handle = NULL; | |
67 | bfd_boolean force_make_executable = FALSE; | |
68 | ||
252b5132 RH |
69 | char *default_target; |
70 | const char *output_filename = "a.out"; | |
71 | ||
72 | /* Name this program was invoked by. */ | |
73 | char *program_name; | |
74 | ||
9c8ebd6a | 75 | /* The prefix for system library directories. */ |
e2243057 | 76 | const char *ld_sysroot; |
9c8ebd6a | 77 | |
3fe38064 NC |
78 | /* The canonical representation of ld_sysroot. */ |
79 | char * ld_canon_sysroot; | |
80 | int ld_canon_sysroot_len; | |
81 | ||
e8044f35 | 82 | /* Set by -G argument, for targets like MIPS ELF. */ |
252b5132 RH |
83 | int g_switch_value = 8; |
84 | ||
85 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 86 | bfd_boolean trace_files; |
252b5132 | 87 | |
cd6f1cf3 NC |
88 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
89 | bfd_boolean verbose; | |
252b5132 RH |
90 | |
91 | /* Nonzero means version number was printed, so exit successfully | |
92 | instead of complaining if no input files are given. */ | |
b34976b6 | 93 | bfd_boolean version_printed; |
252b5132 | 94 | |
b34976b6 AM |
95 | /* TRUE if we should demangle symbol names. */ |
96 | bfd_boolean demangling; | |
252b5132 RH |
97 | |
98 | args_type command_line; | |
99 | ||
100 | ld_config_type config; | |
101 | ||
bcaa7b3e L |
102 | sort_type sort_section; |
103 | ||
e2243057 RS |
104 | static const char *get_sysroot |
105 | (int, char **); | |
0125cdf2 | 106 | static char *get_emulation |
1579bae1 | 107 | (int, char **); |
0125cdf2 | 108 | static bfd_boolean add_archive_element |
5d3236ee | 109 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
0125cdf2 | 110 | static bfd_boolean multiple_definition |
24f58f47 | 111 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 112 | bfd *, asection *, bfd_vma); |
0125cdf2 | 113 | static bfd_boolean multiple_common |
24f58f47 AM |
114 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
115 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 116 | static bfd_boolean add_to_set |
1579bae1 AM |
117 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
118 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 119 | static bfd_boolean constructor_callback |
1579bae1 AM |
120 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
121 | asection *, bfd_vma); | |
0125cdf2 | 122 | static bfd_boolean warning_callback |
1579bae1 AM |
123 | (struct bfd_link_info *, const char *, const char *, bfd *, |
124 | asection *, bfd_vma); | |
0125cdf2 | 125 | static void warning_find_reloc |
1579bae1 | 126 | (bfd *, asection *, void *); |
0125cdf2 | 127 | static bfd_boolean undefined_symbol |
1579bae1 AM |
128 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
129 | bfd_boolean); | |
0125cdf2 | 130 | static bfd_boolean reloc_overflow |
dfeffb9f L |
131 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
132 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 133 | static bfd_boolean reloc_dangerous |
1579bae1 | 134 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 135 | static bfd_boolean unattached_reloc |
1579bae1 | 136 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 137 | static bfd_boolean notice |
35ed3f94 | 138 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
46135103 | 139 | struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword); |
0125cdf2 NC |
140 | |
141 | static struct bfd_link_callbacks link_callbacks = | |
142 | { | |
252b5132 RH |
143 | add_archive_element, |
144 | multiple_definition, | |
145 | multiple_common, | |
146 | add_to_set, | |
147 | constructor_callback, | |
148 | warning_callback, | |
149 | undefined_symbol, | |
150 | reloc_overflow, | |
151 | reloc_dangerous, | |
152 | unattached_reloc, | |
e1fffbe6 | 153 | notice, |
2889e75b | 154 | einfo, |
49fa1e15 AM |
155 | info_msg, |
156 | minfo, | |
2889e75b | 157 | ldlang_override_segment_assignment |
252b5132 RH |
158 | }; |
159 | ||
3b66a141 HPN |
160 | static bfd_assert_handler_type default_bfd_assert_handler; |
161 | ||
252b5132 RH |
162 | struct bfd_link_info link_info; |
163 | \f | |
164 | static void | |
498cd2a0 | 165 | ld_cleanup (void) |
252b5132 | 166 | { |
498cd2a0 AM |
167 | bfd_cache_close_all (); |
168 | #ifdef ENABLE_PLUGINS | |
169 | plugin_call_cleanup (); | |
170 | #endif | |
171 | if (output_filename && delete_output_file_on_failure) | |
172 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
173 | } |
174 | ||
3b66a141 HPN |
175 | /* If there's a BFD assertion, we'll notice and exit with an error |
176 | unless otherwise instructed. */ | |
177 | ||
178 | static void | |
179 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, | |
180 | const char *file, int line) | |
181 | { | |
182 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); | |
183 | config.make_executable = FALSE; | |
184 | } | |
185 | ||
252b5132 | 186 | int |
1579bae1 | 187 | main (int argc, char **argv) |
252b5132 RH |
188 | { |
189 | char *emulation; | |
190 | long start_time = get_run_time (); | |
24a09713 SB |
191 | #ifdef HAVE_SBRK |
192 | char *start_sbrk = (char *) sbrk (0); | |
193 | #endif | |
252b5132 RH |
194 | |
195 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
196 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
197 | #endif |
198 | #if defined (HAVE_SETLOCALE) | |
199 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
200 | #endif |
201 | bindtextdomain (PACKAGE, LOCALEDIR); | |
202 | textdomain (PACKAGE); | |
203 | ||
204 | program_name = argv[0]; | |
205 | xmalloc_set_program_name (program_name); | |
206 | ||
207 | START_PROGRESS (program_name, 0); | |
208 | ||
869b9d07 MM |
209 | expandargv (&argc, &argv); |
210 | ||
252b5132 RH |
211 | bfd_init (); |
212 | ||
213 | bfd_set_error_program_name (program_name); | |
214 | ||
3b66a141 HPN |
215 | /* We want to notice and fail on those nasty BFD assertions which are |
216 | likely to signal incorrect output being generated but otherwise may | |
217 | leave no trace. */ | |
218 | default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); | |
219 | ||
498cd2a0 | 220 | xatexit (ld_cleanup); |
252b5132 | 221 | |
e2243057 RS |
222 | /* Set up the sysroot directory. */ |
223 | ld_sysroot = get_sysroot (argc, argv); | |
224 | if (*ld_sysroot) | |
9c8ebd6a | 225 | { |
e2243057 | 226 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 227 | { |
70487fb2 | 228 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 229 | ld_sysroot = ""; |
0125cdf2 | 230 | } |
e2243057 RS |
231 | else |
232 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 233 | } |
3fe38064 NC |
234 | if (ld_canon_sysroot) |
235 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
236 | else | |
237 | ld_canon_sysroot_len = -1; | |
238 | ||
252b5132 RH |
239 | /* Set the default BFD target based on the configured target. Doing |
240 | this permits the linker to be configured for a particular target, | |
241 | and linked against a shared BFD library which was configured for | |
242 | a different target. The macro TARGET is defined by Makefile. */ | |
243 | if (! bfd_set_default_target (TARGET)) | |
244 | { | |
245 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
246 | xexit (1); | |
247 | } | |
248 | ||
b47c4208 AM |
249 | #if YYDEBUG |
250 | { | |
251 | extern int yydebug; | |
252 | yydebug = 1; | |
253 | } | |
254 | #endif | |
255 | ||
b34976b6 | 256 | config.build_constructors = TRUE; |
c76308d2 | 257 | config.rpath_separator = ':'; |
a854a4a7 AM |
258 | config.split_by_reloc = (unsigned) -1; |
259 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
260 | config.make_executable = TRUE; |
261 | config.magic_demand_paged = TRUE; | |
262 | config.text_read_only = TRUE; | |
4f9d22a0 | 263 | link_info.disable_target_specific_optimizations = -1; |
3b95049e | 264 | |
b34976b6 | 265 | command_line.warn_mismatch = TRUE; |
fe7929ce | 266 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 267 | command_line.check_section_addresses = -1; |
bcaa7b3e | 268 | |
252b5132 RH |
269 | /* We initialize DEMANGLING based on the environment variable |
270 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
271 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
272 | environment. Acting the same way here lets us provide the same | |
273 | interface by default. */ | |
274 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
275 | ||
b34976b6 | 276 | link_info.allow_undefined_version = TRUE; |
b5067602 | 277 | link_info.keep_memory = TRUE; |
b5067602 | 278 | link_info.combreloc = TRUE; |
d5cd3933 | 279 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 280 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
281 | link_info.callbacks = &link_callbacks; |
282 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
283 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
284 | and _fini symbols. We are compatible. */ | |
285 | link_info.init_function = "_init"; | |
286 | link_info.fini_function = "_fini"; | |
a9a4c53e | 287 | link_info.relax_pass = 1; |
889c2a67 | 288 | link_info.extern_protected_data = -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 | 299 | lang_init (); |
18d6a79d | 300 | ldexp_init (); |
252b5132 | 301 | ldemul_before_parse (); |
b34976b6 | 302 | lang_has_input_file = FALSE; |
252b5132 RH |
303 | parse_args (argc, argv); |
304 | ||
2d643429 NC |
305 | if (config.hash_table_size != 0) |
306 | bfd_hash_set_default_size (config.hash_table_size); | |
307 | ||
9bbc1a67 AM |
308 | #ifdef ENABLE_PLUGINS |
309 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
d82184d7 | 310 | plugin_load_plugins (); |
9bbc1a67 | 311 | #endif /* ENABLE_PLUGINS */ |
36af4a4e | 312 | |
9bbc1a67 | 313 | ldemul_set_symbols (); |
252b5132 | 314 | |
14be8564 L |
315 | /* If we have not already opened and parsed a linker script, |
316 | try the default script from command line first. */ | |
317 | if (saved_script_handle == NULL | |
318 | && command_line.default_script != NULL) | |
319 | { | |
320 | ldfile_open_command_file (command_line.default_script); | |
321 | parser_input = input_script; | |
322 | yyparse (); | |
323 | } | |
324 | ||
b9a8de1e NC |
325 | /* If we have not already opened and parsed a linker script |
326 | read the emulation's appropriate default script. */ | |
b90e1c6f | 327 | if (saved_script_handle == NULL) |
252b5132 | 328 | { |
252b5132 | 329 | int isfile; |
b7a26f91 | 330 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
331 | |
332 | if (isfile) | |
7d24f02c | 333 | ldfile_open_default_command_file (s); |
252b5132 | 334 | else |
b7a26f91 | 335 | { |
252b5132 | 336 | lex_string = s; |
dab69f68 | 337 | lex_redirect (s, _("built in linker script"), 1); |
252b5132 RH |
338 | } |
339 | parser_input = input_script; | |
340 | yyparse (); | |
341 | lex_string = NULL; | |
342 | } | |
343 | ||
cd6f1cf3 | 344 | if (verbose) |
b9a8de1e | 345 | { |
9cb61eab AM |
346 | if (saved_script_handle) |
347 | info_msg (_("using external linker script:")); | |
348 | else | |
349 | info_msg (_("using internal linker script:")); | |
350 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
351 | |
352 | if (saved_script_handle) | |
353 | { | |
74699268 | 354 | static const int ld_bufsz = 8193; |
b9a8de1e | 355 | size_t n; |
1e9cc1c2 | 356 | char *buf = (char *) xmalloc (ld_bufsz); |
b9a8de1e NC |
357 | |
358 | rewind (saved_script_handle); | |
74699268 | 359 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 360 | { |
b7a26f91 | 361 | buf[n] = 0; |
b9a8de1e NC |
362 | info_msg (buf); |
363 | } | |
364 | rewind (saved_script_handle); | |
365 | free (buf); | |
366 | } | |
367 | else | |
368 | { | |
369 | int isfile; | |
370 | ||
b7a26f91 | 371 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 372 | } |
b7a26f91 | 373 | |
b9a8de1e NC |
374 | info_msg ("\n==================================================\n"); |
375 | } | |
376 | ||
30824704 RM |
377 | if (command_line.print_output_format) |
378 | info_msg ("%s\n", lang_get_output_target ()); | |
379 | ||
252b5132 RH |
380 | lang_final (); |
381 | ||
61e2488c JT |
382 | /* If the only command line argument has been -v or --version or --verbose |
383 | then ignore any input files provided by linker scripts and exit now. | |
384 | We do not want to create an output file when the linker is just invoked | |
385 | to provide version information. */ | |
386 | if (argc == 2 && version_printed) | |
387 | xexit (0); | |
388 | ||
b34976b6 | 389 | if (!lang_has_input_file) |
252b5132 | 390 | { |
30824704 | 391 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
392 | xexit (0); |
393 | einfo (_("%P%F: no input files\n")); | |
394 | } | |
395 | ||
396 | if (trace_files) | |
0125cdf2 | 397 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
398 | |
399 | ldemul_after_parse (); | |
400 | ||
252b5132 RH |
401 | if (config.map_filename) |
402 | { | |
403 | if (strcmp (config.map_filename, "-") == 0) | |
404 | { | |
405 | config.map_file = stdout; | |
406 | } | |
407 | else | |
408 | { | |
409 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
410 | if (config.map_file == (FILE *) NULL) | |
411 | { | |
412 | bfd_set_error (bfd_error_system_call); | |
413 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
414 | config.map_filename); | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
252b5132 RH |
419 | lang_process (); |
420 | ||
421 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 422 | symbols, and possibly multiple definitions. */ |
1049f94e | 423 | if (link_info.relocatable) |
f13a99db | 424 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 425 | else |
f13a99db | 426 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
427 | |
428 | ldwrite (); | |
429 | ||
430 | if (config.map_file != NULL) | |
431 | lang_map (); | |
432 | if (command_line.cref) | |
433 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
434 | if (nocrossref_list != NULL) | |
435 | check_nocrossrefs (); | |
edf84efc NC |
436 | #if 0 |
437 | { | |
438 | struct bfd_link_hash_entry * h; | |
252b5132 | 439 | |
edf84efc NC |
440 | h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); |
441 | fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); | |
442 | } | |
443 | #endif | |
18d6a79d | 444 | ldexp_finish (); |
750877ba L |
445 | lang_finish (); |
446 | ||
1049f94e | 447 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 448 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 449 | want to ignore for relocatable output?) */ |
b34976b6 | 450 | if (!config.make_executable && !force_make_executable) |
252b5132 | 451 | { |
b34976b6 | 452 | if (trace_files) |
0125cdf2 NC |
453 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
454 | output_filename); | |
252b5132 | 455 | |
4309cbf2 | 456 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
457 | xexit (1); |
458 | } | |
459 | else | |
460 | { | |
f13a99db AM |
461 | if (! bfd_close (link_info.output_bfd)) |
462 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
463 | |
464 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
465 | executable file and it doesn't end in .exe, copy it to one |
466 | which does. */ | |
1049f94e | 467 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
468 | { |
469 | int len = strlen (output_filename); | |
0125cdf2 | 470 | |
6d5e62f8 | 471 | if (len < 4 |
252b5132 RH |
472 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
473 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
474 | { | |
475 | FILE *src; | |
476 | FILE *dst; | |
477 | const int bsize = 4096; | |
1e9cc1c2 | 478 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 479 | int l; |
1e9cc1c2 | 480 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 481 | |
252b5132 RH |
482 | strcpy (dst_name, output_filename); |
483 | strcat (dst_name, ".exe"); | |
484 | src = fopen (output_filename, FOPEN_RB); | |
485 | dst = fopen (dst_name, FOPEN_WB); | |
486 | ||
487 | if (!src) | |
b3862264 | 488 | einfo (_("%P%F: unable to open for source of copy `%s'\n"), |
1579bae1 | 489 | output_filename); |
252b5132 | 490 | if (!dst) |
b3862264 | 491 | einfo (_("%P%F: unable to open for destination of copy `%s'\n"), |
1579bae1 | 492 | dst_name); |
252b5132 RH |
493 | while ((l = fread (buf, 1, bsize, src)) > 0) |
494 | { | |
495 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 496 | |
252b5132 | 497 | if (done != l) |
0125cdf2 | 498 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 499 | } |
0125cdf2 | 500 | |
252b5132 RH |
501 | fclose (src); |
502 | if (fclose (dst) == EOF) | |
0125cdf2 | 503 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
504 | free (dst_name); |
505 | free (buf); | |
506 | } | |
507 | } | |
508 | } | |
509 | ||
510 | END_PROGRESS (program_name); | |
511 | ||
512 | if (config.stats) | |
513 | { | |
514 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 515 | char *lim = (char *) sbrk (0); |
252b5132 RH |
516 | #endif |
517 | long run_time = get_run_time () - start_time; | |
518 | ||
e922bcab | 519 | fflush (stdout); |
252b5132 RH |
520 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
521 | program_name, run_time / 1000000, run_time % 1000000); | |
522 | #ifdef HAVE_SBRK | |
523 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
24a09713 | 524 | (long) (lim - start_sbrk)); |
252b5132 | 525 | #endif |
e922bcab | 526 | fflush (stderr); |
252b5132 RH |
527 | } |
528 | ||
4309cbf2 | 529 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
530 | output_filename = NULL; |
531 | ||
532 | xexit (0); | |
533 | return 0; | |
534 | } | |
535 | ||
e2243057 RS |
536 | /* If the configured sysroot is relocatable, try relocating it based on |
537 | default prefix FROM. Return the relocated directory if it exists, | |
538 | otherwise return null. */ | |
539 | ||
540 | static char * | |
541 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
542 | { | |
543 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
544 | char *path; | |
545 | struct stat s; | |
546 | ||
547 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
548 | if (path) | |
549 | { | |
550 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
551 | return path; | |
552 | free (path); | |
553 | } | |
554 | #endif | |
555 | return 0; | |
556 | } | |
557 | ||
558 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
559 | ||
560 | static const char * | |
561 | get_sysroot (int argc, char **argv) | |
562 | { | |
563 | int i; | |
564 | const char *path; | |
565 | ||
566 | for (i = 1; i < argc; i++) | |
0112cd26 | 567 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
568 | return argv[i] + strlen ("--sysroot="); |
569 | ||
570 | path = get_relative_sysroot (BINDIR); | |
571 | if (path) | |
572 | return path; | |
573 | ||
574 | path = get_relative_sysroot (TOOLBINDIR); | |
575 | if (path) | |
576 | return path; | |
577 | ||
578 | return TARGET_SYSTEM_ROOT; | |
579 | } | |
580 | ||
252b5132 RH |
581 | /* We need to find any explicitly given emulation in order to initialize the |
582 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
583 | ||
584 | static char * | |
1579bae1 | 585 | get_emulation (int argc, char **argv) |
252b5132 RH |
586 | { |
587 | char *emulation; | |
588 | int i; | |
589 | ||
590 | emulation = getenv (EMULATION_ENVIRON); | |
591 | if (emulation == NULL) | |
592 | emulation = DEFAULT_EMULATION; | |
593 | ||
594 | for (i = 1; i < argc; i++) | |
595 | { | |
0112cd26 | 596 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
597 | { |
598 | if (argv[i][2] == '\0') | |
599 | { | |
600 | /* -m EMUL */ | |
601 | if (i < argc - 1) | |
602 | { | |
603 | emulation = argv[i + 1]; | |
604 | i++; | |
605 | } | |
606 | else | |
0125cdf2 | 607 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
608 | } |
609 | else if (strcmp (argv[i], "-mips1") == 0 | |
610 | || strcmp (argv[i], "-mips2") == 0 | |
611 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 612 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
613 | || strcmp (argv[i], "-mips5") == 0 |
614 | || strcmp (argv[i], "-mips32") == 0 | |
615 | || strcmp (argv[i], "-mips32r2") == 0 | |
7361da2c | 616 | || strcmp (argv[i], "-mips32r6") == 0 |
5f74bc13 | 617 | || strcmp (argv[i], "-mips64") == 0 |
7361da2c AB |
618 | || strcmp (argv[i], "-mips64r2") == 0 |
619 | || strcmp (argv[i], "-mips64r6") == 0) | |
252b5132 | 620 | { |
31d677f9 | 621 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
622 | passed to the linker by some MIPS compilers. They |
623 | generally tell the linker to use a slightly different | |
624 | library path. Perhaps someday these should be | |
625 | implemented as emulations; until then, we just ignore | |
626 | the arguments and hope that nobody ever creates | |
627 | emulations named ips1, ips2 or ips3. */ | |
628 | } | |
629 | else if (strcmp (argv[i], "-m486") == 0) | |
630 | { | |
631 | /* FIXME: The argument -m486 is passed to the linker on | |
632 | some Linux systems. Hope that nobody creates an | |
633 | emulation named 486. */ | |
634 | } | |
635 | else | |
636 | { | |
637 | /* -mEMUL */ | |
638 | emulation = &argv[i][2]; | |
639 | } | |
640 | } | |
641 | } | |
642 | ||
643 | return emulation; | |
644 | } | |
645 | ||
252b5132 | 646 | void |
1579bae1 | 647 | add_ysym (const char *name) |
252b5132 | 648 | { |
1579bae1 | 649 | if (link_info.notice_hash == NULL) |
252b5132 | 650 | { |
1e9cc1c2 NC |
651 | link_info.notice_hash = |
652 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
653 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
654 | bfd_hash_newfunc, | |
655 | sizeof (struct bfd_hash_entry), | |
656 | 61)) | |
252b5132 | 657 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 658 | } |
252b5132 | 659 | |
1579bae1 | 660 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
661 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
662 | } | |
663 | ||
0e86e20e AM |
664 | void |
665 | add_ignoresym (struct bfd_link_info *info, const char *name) | |
666 | { | |
667 | if (info->ignore_hash == NULL) | |
668 | { | |
669 | info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); | |
670 | if (! bfd_hash_table_init_n (info->ignore_hash, | |
671 | bfd_hash_newfunc, | |
672 | sizeof (struct bfd_hash_entry), | |
673 | 61)) | |
674 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
675 | } | |
676 | ||
677 | if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) | |
678 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
679 | } | |
680 | ||
252b5132 RH |
681 | /* Record a symbol to be wrapped, from the --wrap option. */ |
682 | ||
683 | void | |
1579bae1 | 684 | add_wrap (const char *name) |
252b5132 RH |
685 | { |
686 | if (link_info.wrap_hash == NULL) | |
687 | { | |
1e9cc1c2 NC |
688 | link_info.wrap_hash = |
689 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
690 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
691 | bfd_hash_newfunc, | |
692 | sizeof (struct bfd_hash_entry), | |
693 | 61)) | |
252b5132 RH |
694 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
695 | } | |
0125cdf2 | 696 | |
b34976b6 | 697 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
698 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
699 | } | |
700 | ||
701 | /* Handle the -retain-symbols-file option. */ | |
702 | ||
703 | void | |
1579bae1 | 704 | add_keepsyms_file (const char *filename) |
252b5132 RH |
705 | { |
706 | FILE *file; | |
707 | char *buf; | |
708 | size_t bufsize; | |
709 | int c; | |
710 | ||
711 | if (link_info.strip == strip_some) | |
712 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
713 | ||
714 | file = fopen (filename, "r"); | |
1579bae1 | 715 | if (file == NULL) |
252b5132 RH |
716 | { |
717 | bfd_set_error (bfd_error_system_call); | |
718 | einfo ("%X%P: %s: %E\n", filename); | |
719 | return; | |
720 | } | |
721 | ||
1e9cc1c2 NC |
722 | link_info.keep_hash = (struct bfd_hash_table *) |
723 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
724 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
725 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
726 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
727 | ||
728 | bufsize = 100; | |
1e9cc1c2 | 729 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
730 | |
731 | c = getc (file); | |
732 | while (c != EOF) | |
733 | { | |
3882b010 | 734 | while (ISSPACE (c)) |
252b5132 RH |
735 | c = getc (file); |
736 | ||
737 | if (c != EOF) | |
738 | { | |
739 | size_t len = 0; | |
740 | ||
3882b010 | 741 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
742 | { |
743 | buf[len] = c; | |
744 | ++len; | |
745 | if (len >= bufsize) | |
746 | { | |
747 | bufsize *= 2; | |
1e9cc1c2 | 748 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
749 | } |
750 | c = getc (file); | |
751 | } | |
752 | ||
753 | buf[len] = '\0'; | |
754 | ||
1579bae1 | 755 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
756 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
757 | } | |
758 | } | |
759 | ||
760 | if (link_info.strip != strip_none) | |
761 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
762 | ||
5ed6aba4 | 763 | free (buf); |
252b5132 | 764 | link_info.strip = strip_some; |
d9313f4f | 765 | fclose (file); |
252b5132 RH |
766 | } |
767 | \f | |
768 | /* Callbacks from the BFD linker routines. */ | |
769 | ||
770 | /* This is called when BFD has decided to include an archive member in | |
771 | a link. */ | |
772 | ||
b34976b6 | 773 | static bfd_boolean |
e1fffbe6 | 774 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 775 | bfd *abfd, |
5d3236ee DK |
776 | const char *name, |
777 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
778 | { |
779 | lang_input_statement_type *input; | |
5d3236ee | 780 | lang_input_statement_type orig_input; |
252b5132 | 781 | |
1e9cc1c2 NC |
782 | input = (lang_input_statement_type *) |
783 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
784 | input->filename = abfd->filename; |
785 | input->local_sym_name = abfd->filename; | |
786 | input->the_bfd = abfd; | |
252b5132 | 787 | |
5d3236ee DK |
788 | /* Save the original data for trace files/tries below, as plugins |
789 | (if enabled) may possibly alter it to point to a replacement | |
790 | BFD, but we still want to output the original BFD filename. */ | |
791 | orig_input = *input; | |
792 | #ifdef ENABLE_PLUGINS | |
716db898 | 793 | if (link_info.lto_plugin_active && !no_more_claiming) |
5d3236ee DK |
794 | { |
795 | /* We must offer this archive member to the plugins to claim. */ | |
35a1e5f3 L |
796 | plugin_maybe_claim (input); |
797 | if (input->flags.claimed) | |
5d3236ee | 798 | { |
35a1e5f3 L |
799 | input->flags.claim_archive = TRUE; |
800 | *subsbfd = input->the_bfd; | |
5d3236ee DK |
801 | } |
802 | } | |
803 | #endif /* ENABLE_PLUGINS */ | |
804 | ||
252b5132 RH |
805 | ldlang_add_file (input); |
806 | ||
1579bae1 | 807 | if (config.map_file != NULL) |
252b5132 | 808 | { |
b34976b6 | 809 | static bfd_boolean header_printed; |
252b5132 RH |
810 | struct bfd_link_hash_entry *h; |
811 | bfd *from; | |
812 | int len; | |
813 | ||
e1fffbe6 | 814 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
815 | |
816 | if (h == NULL) | |
817 | from = NULL; | |
818 | else | |
819 | { | |
820 | switch (h->type) | |
821 | { | |
822 | default: | |
823 | from = NULL; | |
824 | break; | |
825 | ||
826 | case bfd_link_hash_defined: | |
827 | case bfd_link_hash_defweak: | |
828 | from = h->u.def.section->owner; | |
829 | break; | |
830 | ||
831 | case bfd_link_hash_undefined: | |
832 | case bfd_link_hash_undefweak: | |
833 | from = h->u.undef.abfd; | |
834 | break; | |
835 | ||
836 | case bfd_link_hash_common: | |
837 | from = h->u.c.p->section->owner; | |
838 | break; | |
839 | } | |
840 | } | |
841 | ||
842 | if (! header_printed) | |
843 | { | |
844 | char buf[100]; | |
845 | ||
16e4ecc0 AM |
846 | sprintf (buf, _("Archive member included " |
847 | "to satisfy reference by file (symbol)\n\n")); | |
252b5132 | 848 | minfo ("%s", buf); |
b34976b6 | 849 | header_printed = TRUE; |
252b5132 RH |
850 | } |
851 | ||
852 | if (bfd_my_archive (abfd) == NULL) | |
853 | { | |
854 | minfo ("%s", bfd_get_filename (abfd)); | |
855 | len = strlen (bfd_get_filename (abfd)); | |
856 | } | |
857 | else | |
858 | { | |
859 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
860 | bfd_get_filename (abfd)); | |
861 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
862 | + strlen (bfd_get_filename (abfd)) | |
863 | + 2); | |
864 | } | |
865 | ||
866 | if (len >= 29) | |
867 | { | |
868 | print_nl (); | |
869 | len = 0; | |
870 | } | |
871 | while (len < 30) | |
872 | { | |
873 | print_space (); | |
874 | ++len; | |
875 | } | |
876 | ||
877 | if (from != NULL) | |
878 | minfo ("%B ", from); | |
879 | if (h != NULL) | |
880 | minfo ("(%T)\n", h->root.string); | |
881 | else | |
882 | minfo ("(%s)\n", name); | |
883 | } | |
884 | ||
cd6f1cf3 | 885 | if (trace_files || verbose) |
5d3236ee | 886 | info_msg ("%I\n", &orig_input); |
b34976b6 | 887 | return TRUE; |
252b5132 RH |
888 | } |
889 | ||
890 | /* This is called when BFD has discovered a symbol which is defined | |
891 | multiple times. */ | |
892 | ||
b34976b6 | 893 | static bfd_boolean |
24f58f47 AM |
894 | multiple_definition (struct bfd_link_info *info, |
895 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
896 | bfd *nbfd, |
897 | asection *nsec, | |
898 | bfd_vma nval) | |
252b5132 | 899 | { |
24f58f47 AM |
900 | const char *name; |
901 | bfd *obfd; | |
902 | asection *osec; | |
903 | bfd_vma oval; | |
904 | ||
905 | if (info->allow_multiple_definition) | |
906 | return TRUE; | |
907 | ||
908 | switch (h->type) | |
909 | { | |
910 | case bfd_link_hash_defined: | |
911 | osec = h->u.def.section; | |
912 | oval = h->u.def.value; | |
913 | obfd = h->u.def.section->owner; | |
914 | break; | |
915 | case bfd_link_hash_indirect: | |
916 | osec = bfd_ind_section_ptr; | |
917 | oval = 0; | |
918 | obfd = NULL; | |
919 | break; | |
920 | default: | |
921 | abort (); | |
922 | } | |
923 | ||
924 | /* Ignore a redefinition of an absolute symbol to the | |
925 | same value; it's harmless. */ | |
926 | if (h->type == bfd_link_hash_defined | |
927 | && bfd_is_abs_section (osec) | |
928 | && bfd_is_abs_section (nsec) | |
929 | && nval == oval) | |
930 | return TRUE; | |
931 | ||
252b5132 RH |
932 | /* If either section has the output_section field set to |
933 | bfd_abs_section_ptr, it means that the section is being | |
934 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
935 | FIXME: It would be cleaner to somehow ignore symbols defined in |
936 | sections which are being discarded. */ | |
252b5132 RH |
937 | if ((osec->output_section != NULL |
938 | && ! bfd_is_abs_section (osec) | |
939 | && bfd_is_abs_section (osec->output_section)) | |
940 | || (nsec->output_section != NULL | |
941 | && ! bfd_is_abs_section (nsec) | |
942 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 943 | return TRUE; |
252b5132 | 944 | |
24f58f47 AM |
945 | name = h->root.string; |
946 | if (nbfd == NULL) | |
947 | { | |
948 | nbfd = obfd; | |
949 | nsec = osec; | |
950 | nval = oval; | |
951 | obfd = NULL; | |
952 | } | |
252b5132 RH |
953 | einfo (_("%X%C: multiple definition of `%T'\n"), |
954 | nbfd, nsec, nval, name); | |
1579bae1 | 955 | if (obfd != NULL) |
252b5132 | 956 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 957 | |
13761a11 | 958 | if (RELAXATION_ENABLED_BY_USER) |
9b14b192 NC |
959 | { |
960 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
13761a11 | 961 | DISABLE_RELAXATION; |
9b14b192 | 962 | } |
6d5e62f8 | 963 | |
b34976b6 | 964 | return TRUE; |
252b5132 RH |
965 | } |
966 | ||
967 | /* This is called when there is a definition of a common symbol, or | |
968 | when a common symbol is found for a symbol that is already defined, | |
969 | or when two common symbols are found. We only do something if | |
970 | -warn-common was used. */ | |
971 | ||
b34976b6 | 972 | static bfd_boolean |
1579bae1 | 973 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 974 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
975 | bfd *nbfd, |
976 | enum bfd_link_hash_type ntype, | |
977 | bfd_vma nsize) | |
252b5132 | 978 | { |
24f58f47 AM |
979 | const char *name; |
980 | bfd *obfd; | |
981 | enum bfd_link_hash_type otype; | |
982 | bfd_vma osize; | |
983 | ||
984 | if (!config.warn_common) | |
b34976b6 | 985 | return TRUE; |
252b5132 | 986 | |
24f58f47 AM |
987 | name = h->root.string; |
988 | otype = h->type; | |
989 | if (otype == bfd_link_hash_common) | |
990 | { | |
991 | obfd = h->u.c.p->section->owner; | |
992 | osize = h->u.c.size; | |
993 | } | |
994 | else if (otype == bfd_link_hash_defined | |
995 | || otype == bfd_link_hash_defweak) | |
996 | { | |
997 | obfd = h->u.def.section->owner; | |
998 | osize = 0; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | /* FIXME: It would nice if we could report the BFD which defined | |
1003 | an indirect symbol, but we don't have anywhere to store the | |
1004 | information. */ | |
1005 | obfd = NULL; | |
1006 | osize = 0; | |
1007 | } | |
1008 | ||
252b5132 RH |
1009 | if (ntype == bfd_link_hash_defined |
1010 | || ntype == bfd_link_hash_defweak | |
1011 | || ntype == bfd_link_hash_indirect) | |
1012 | { | |
1013 | ASSERT (otype == bfd_link_hash_common); | |
1014 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1015 | nbfd, name); | |
1016 | if (obfd != NULL) | |
1017 | einfo (_("%B: warning: common is here\n"), obfd); | |
1018 | } | |
1019 | else if (otype == bfd_link_hash_defined | |
1020 | || otype == bfd_link_hash_defweak | |
1021 | || otype == bfd_link_hash_indirect) | |
1022 | { | |
1023 | ASSERT (ntype == bfd_link_hash_common); | |
1024 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1025 | nbfd, name); | |
1026 | if (obfd != NULL) | |
1027 | einfo (_("%B: warning: defined here\n"), obfd); | |
1028 | } | |
1029 | else | |
1030 | { | |
1031 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1032 | if (osize > nsize) | |
1033 | { | |
1034 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1035 | nbfd, name); | |
1036 | if (obfd != NULL) | |
1037 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1038 | } | |
1039 | else if (nsize > osize) | |
1040 | { | |
1041 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1042 | nbfd, name); | |
1043 | if (obfd != NULL) | |
1044 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1049 | if (obfd != NULL) | |
1050 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1051 | } | |
1052 | } | |
1053 | ||
b34976b6 | 1054 | return TRUE; |
252b5132 RH |
1055 | } |
1056 | ||
1057 | /* This is called when BFD has discovered a set element. H is the | |
1058 | entry in the linker hash table for the set. SECTION and VALUE | |
1059 | represent a value which should be added to the set. */ | |
1060 | ||
b34976b6 | 1061 | static bfd_boolean |
1579bae1 AM |
1062 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1063 | struct bfd_link_hash_entry *h, | |
1064 | bfd_reloc_code_real_type reloc, | |
1065 | bfd *abfd, | |
1066 | asection *section, | |
1067 | bfd_vma value) | |
252b5132 RH |
1068 | { |
1069 | if (config.warn_constructors) | |
1070 | einfo (_("%P: warning: global constructor %s used\n"), | |
1071 | h->root.string); | |
1072 | ||
1073 | if (! config.build_constructors) | |
b34976b6 | 1074 | return TRUE; |
252b5132 | 1075 | |
1579bae1 | 1076 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1077 | |
1078 | if (h->type == bfd_link_hash_new) | |
1079 | { | |
1080 | h->type = bfd_link_hash_undefined; | |
1081 | h->u.undef.abfd = abfd; | |
1082 | /* We don't call bfd_link_add_undef to add this to the list of | |
1083 | undefined symbols because we are going to define it | |
1084 | ourselves. */ | |
1085 | } | |
1086 | ||
b34976b6 | 1087 | return TRUE; |
252b5132 RH |
1088 | } |
1089 | ||
1090 | /* This is called when BFD has discovered a constructor. This is only | |
1091 | called for some object file formats--those which do not handle | |
1092 | constructors in some more clever fashion. This is similar to | |
1093 | adding an element to a set, but less general. */ | |
1094 | ||
b34976b6 | 1095 | static bfd_boolean |
1579bae1 AM |
1096 | constructor_callback (struct bfd_link_info *info, |
1097 | bfd_boolean constructor, | |
1098 | const char *name, | |
1099 | bfd *abfd, | |
1100 | asection *section, | |
1101 | bfd_vma value) | |
252b5132 RH |
1102 | { |
1103 | char *s; | |
1104 | struct bfd_link_hash_entry *h; | |
1105 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1106 | ||
1107 | if (config.warn_constructors) | |
1108 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1109 | ||
1110 | if (! config.build_constructors) | |
b34976b6 | 1111 | return TRUE; |
252b5132 RH |
1112 | |
1113 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1114 | useful error message. */ | |
0e86e20e | 1115 | if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1116 | && (info->relocatable |
252b5132 RH |
1117 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1118 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1119 | ||
1120 | s = set_name; | |
1121 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1122 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1123 | if (constructor) | |
1124 | strcpy (s, "__CTOR_LIST__"); | |
1125 | else | |
1126 | strcpy (s, "__DTOR_LIST__"); | |
1127 | ||
b34976b6 | 1128 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1129 | if (h == (struct bfd_link_hash_entry *) NULL) |
1130 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1131 | if (h->type == bfd_link_hash_new) | |
1132 | { | |
1133 | h->type = bfd_link_hash_undefined; | |
1134 | h->u.undef.abfd = abfd; | |
1135 | /* We don't call bfd_link_add_undef to add this to the list of | |
1136 | undefined symbols because we are going to define it | |
1137 | ourselves. */ | |
1138 | } | |
1139 | ||
1140 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1141 | return TRUE; |
252b5132 RH |
1142 | } |
1143 | ||
1144 | /* A structure used by warning_callback to pass information through | |
1145 | bfd_map_over_sections. */ | |
1146 | ||
0125cdf2 NC |
1147 | struct warning_callback_info |
1148 | { | |
b34976b6 | 1149 | bfd_boolean found; |
252b5132 RH |
1150 | const char *warning; |
1151 | const char *symbol; | |
1152 | asymbol **asymbols; | |
1153 | }; | |
1154 | ||
4c6d802e L |
1155 | /* Look through the relocs to see if we can find a plausible address |
1156 | for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ | |
1157 | ||
1158 | static bfd_boolean | |
1159 | symbol_warning (const char *warning, const char *symbol, bfd *abfd) | |
1160 | { | |
1161 | struct warning_callback_info cinfo; | |
1162 | ||
1163 | if (!bfd_generic_link_read_symbols (abfd)) | |
1164 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1165 | ||
1166 | cinfo.found = FALSE; | |
1167 | cinfo.warning = warning; | |
1168 | cinfo.symbol = symbol; | |
1169 | cinfo.asymbols = bfd_get_outsymbols (abfd); | |
1170 | bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); | |
1171 | return cinfo.found; | |
1172 | } | |
1173 | ||
252b5132 RH |
1174 | /* This is called when there is a reference to a warning symbol. */ |
1175 | ||
b34976b6 | 1176 | static bfd_boolean |
1579bae1 AM |
1177 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1178 | const char *warning, | |
1179 | const char *symbol, | |
1180 | bfd *abfd, | |
1181 | asection *section, | |
1182 | bfd_vma address) | |
252b5132 RH |
1183 | { |
1184 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1185 | have a cleaner interface, but what? */ | |
1186 | if (! config.warn_multiple_gp | |
1187 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1188 | return TRUE; |
252b5132 RH |
1189 | |
1190 | if (section != NULL) | |
300475fe | 1191 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1192 | else if (abfd == NULL) |
300475fe | 1193 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1194 | else if (symbol == NULL) |
300475fe | 1195 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
4c6d802e | 1196 | else if (! symbol_warning (warning, symbol, abfd)) |
252b5132 | 1197 | { |
4c6d802e L |
1198 | bfd *b; |
1199 | /* Search all input files for a reference to SYMBOL. */ | |
c72f2fb2 | 1200 | for (b = info->input_bfds; b; b = b->link.next) |
4c6d802e L |
1201 | if (b != abfd && symbol_warning (warning, symbol, b)) |
1202 | return TRUE; | |
1203 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); | |
252b5132 RH |
1204 | } |
1205 | ||
b34976b6 | 1206 | return TRUE; |
252b5132 RH |
1207 | } |
1208 | ||
1209 | /* This is called by warning_callback for each section. It checks the | |
1210 | relocs of the section to see if it can find a reference to the | |
1211 | symbol which triggered the warning. If it can, it uses the reloc | |
1212 | to give an error message with a file and line number. */ | |
1213 | ||
1214 | static void | |
1579bae1 | 1215 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1216 | { |
1e9cc1c2 | 1217 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1218 | long relsize; |
1219 | arelent **relpp; | |
1220 | long relcount; | |
1221 | arelent **p, **pend; | |
1222 | ||
1223 | if (info->found) | |
1224 | return; | |
1225 | ||
1226 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1227 | if (relsize < 0) | |
1228 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1229 | if (relsize == 0) | |
1230 | return; | |
1231 | ||
1e9cc1c2 | 1232 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1233 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1234 | if (relcount < 0) | |
1235 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1236 | ||
1237 | p = relpp; | |
1238 | pend = p + relcount; | |
1239 | for (; p < pend && *p != NULL; p++) | |
1240 | { | |
1241 | arelent *q = *p; | |
1242 | ||
1243 | if (q->sym_ptr_ptr != NULL | |
1244 | && *q->sym_ptr_ptr != NULL | |
1245 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1246 | { | |
1247 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1248 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1249 | info->warning); | |
b34976b6 | 1250 | info->found = TRUE; |
252b5132 RH |
1251 | break; |
1252 | } | |
1253 | } | |
1254 | ||
1255 | free (relpp); | |
1256 | } | |
1257 | ||
1258 | /* This is called when an undefined symbol is found. */ | |
1259 | ||
b34976b6 | 1260 | static bfd_boolean |
0e86e20e | 1261 | undefined_symbol (struct bfd_link_info *info, |
1579bae1 AM |
1262 | const char *name, |
1263 | bfd *abfd, | |
1264 | asection *section, | |
1265 | bfd_vma address, | |
0b28295d | 1266 | bfd_boolean error) |
252b5132 RH |
1267 | { |
1268 | static char *error_name; | |
1269 | static unsigned int error_count; | |
1270 | ||
1271 | #define MAX_ERRORS_IN_A_ROW 5 | |
1272 | ||
0e86e20e AM |
1273 | if (info->ignore_hash != NULL |
1274 | && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) | |
1275 | return TRUE; | |
1276 | ||
252b5132 RH |
1277 | if (config.warn_once) |
1278 | { | |
252b5132 | 1279 | /* Only warn once about a particular undefined symbol. */ |
0e86e20e | 1280 | add_ignoresym (info, name); |
252b5132 RH |
1281 | } |
1282 | ||
1283 | /* We never print more than a reasonable number of errors in a row | |
1284 | for a single symbol. */ | |
1579bae1 | 1285 | if (error_name != NULL |
252b5132 RH |
1286 | && strcmp (name, error_name) == 0) |
1287 | ++error_count; | |
1288 | else | |
1289 | { | |
1290 | error_count = 0; | |
1579bae1 | 1291 | if (error_name != NULL) |
252b5132 | 1292 | free (error_name); |
d1b2b2dc | 1293 | error_name = xstrdup (name); |
252b5132 RH |
1294 | } |
1295 | ||
1296 | if (section != NULL) | |
1297 | { | |
1298 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1299 | { |
0b28295d ILT |
1300 | if (error) |
1301 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1302 | abfd, section, address, name); | |
1303 | else | |
1304 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1305 | abfd, section, address, name); | |
b6f29aaa | 1306 | } |
252b5132 | 1307 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1308 | { |
1309 | if (error) | |
1310 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1311 | abfd, section, address, name); | |
1312 | else | |
1313 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1314 | abfd, section, address, name); | |
1315 | } | |
1316 | else if (error) | |
1317 | einfo ("%X"); | |
252b5132 RH |
1318 | } |
1319 | else | |
1320 | { | |
1321 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1322 | { |
0b28295d ILT |
1323 | if (error) |
1324 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1325 | abfd, name); | |
1326 | else | |
1327 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1328 | abfd, name); | |
b6f29aaa | 1329 | } |
252b5132 | 1330 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1331 | { |
1332 | if (error) | |
1333 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1334 | abfd, name); | |
1335 | else | |
1336 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1337 | abfd, name); | |
1338 | } | |
1339 | else if (error) | |
1340 | einfo ("%X"); | |
252b5132 RH |
1341 | } |
1342 | ||
b34976b6 | 1343 | return TRUE; |
252b5132 RH |
1344 | } |
1345 | ||
8aae64e6 AO |
1346 | /* Counter to limit the number of relocation overflow error messages |
1347 | to print. Errors are printed as it is decremented. When it's | |
1348 | called and the counter is zero, a final message is printed | |
1349 | indicating more relocations were omitted. When it gets to -1, no | |
1350 | such errors are printed. If it's initially set to a value less | |
1351 | than -1, all such errors will be printed (--verbose does this). */ | |
1352 | ||
1353 | int overflow_cutoff_limit = 10; | |
1354 | ||
252b5132 RH |
1355 | /* This is called when a reloc overflows. */ |
1356 | ||
b34976b6 | 1357 | static bfd_boolean |
0e86e20e | 1358 | reloc_overflow (struct bfd_link_info *info, |
dfeffb9f | 1359 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1360 | const char *name, |
1361 | const char *reloc_name, | |
1362 | bfd_vma addend, | |
1363 | bfd *abfd, | |
1364 | asection *section, | |
1365 | bfd_vma address) | |
252b5132 | 1366 | { |
8aae64e6 AO |
1367 | if (overflow_cutoff_limit == -1) |
1368 | return TRUE; | |
1369 | ||
270396f2 | 1370 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1371 | |
1372 | if (overflow_cutoff_limit >= 0 | |
1373 | && overflow_cutoff_limit-- == 0) | |
1374 | { | |
1375 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1376 | return TRUE; | |
1377 | } | |
1378 | ||
dfeffb9f L |
1379 | if (entry) |
1380 | { | |
1381 | while (entry->type == bfd_link_hash_indirect | |
1382 | || entry->type == bfd_link_hash_warning) | |
1383 | entry = entry->u.i.link; | |
1384 | switch (entry->type) | |
1385 | { | |
1386 | case bfd_link_hash_undefined: | |
1387 | case bfd_link_hash_undefweak: | |
1388 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1389 | reloc_name, entry->root.string); | |
1390 | break; | |
1391 | case bfd_link_hash_defined: | |
1392 | case bfd_link_hash_defweak: | |
1393 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1394 | reloc_name, entry->root.string, | |
a6e1b90f L |
1395 | entry->u.def.section, |
1396 | entry->u.def.section == bfd_abs_section_ptr | |
0e86e20e | 1397 | ? info->output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1398 | break; |
1399 | default: | |
1400 | abort (); | |
1401 | break; | |
1402 | } | |
1403 | } | |
1404 | else | |
1405 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1406 | reloc_name, name); | |
252b5132 RH |
1407 | if (addend != 0) |
1408 | einfo ("+%v", addend); | |
1409 | einfo ("\n"); | |
b34976b6 | 1410 | return TRUE; |
252b5132 RH |
1411 | } |
1412 | ||
1413 | /* This is called when a dangerous relocation is made. */ | |
1414 | ||
b34976b6 | 1415 | static bfd_boolean |
1579bae1 AM |
1416 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1417 | const char *message, | |
1418 | bfd *abfd, | |
1419 | asection *section, | |
1420 | bfd_vma address) | |
252b5132 | 1421 | { |
270396f2 | 1422 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1423 | abfd, section, address, message); |
b34976b6 | 1424 | return TRUE; |
252b5132 RH |
1425 | } |
1426 | ||
1427 | /* This is called when a reloc is being generated attached to a symbol | |
1428 | that is not being output. */ | |
1429 | ||
b34976b6 | 1430 | static bfd_boolean |
1579bae1 AM |
1431 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1432 | const char *name, | |
1433 | bfd *abfd, | |
1434 | asection *section, | |
1435 | bfd_vma address) | |
252b5132 | 1436 | { |
270396f2 | 1437 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1438 | abfd, section, address, name); |
b34976b6 | 1439 | return TRUE; |
252b5132 RH |
1440 | } |
1441 | ||
1442 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1443 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1444 | using the -y option, while notice_all is set if the --cref option |
1445 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1446 | linker script; and if plugins are active, since they need to monitor | |
1447 | all references from non-IR files. */ | |
252b5132 | 1448 | |
b34976b6 | 1449 | static bfd_boolean |
1579bae1 | 1450 | notice (struct bfd_link_info *info, |
35ed3f94 | 1451 | struct bfd_link_hash_entry *h, |
46135103 | 1452 | struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, |
1579bae1 AM |
1453 | bfd *abfd, |
1454 | asection *section, | |
16d96b5b | 1455 | bfd_vma value, |
46135103 | 1456 | flagword flags ATTRIBUTE_UNUSED) |
252b5132 | 1457 | { |
35ed3f94 AM |
1458 | const char *name; |
1459 | ||
1460 | if (h == NULL) | |
5061a885 AM |
1461 | { |
1462 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1463 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1464 | return TRUE; |
1465 | } | |
1466 | ||
35ed3f94 | 1467 | name = h->root.string; |
5d3236ee | 1468 | if (info->notice_hash != NULL |
9e2278f5 | 1469 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1470 | { |
1471 | if (bfd_is_und_section (section)) | |
1472 | einfo ("%B: reference to %s\n", abfd, name); | |
1473 | else | |
1474 | einfo ("%B: definition of %s\n", abfd, name); | |
1475 | } | |
1476 | ||
1477 | if (command_line.cref || nocrossref_list != NULL) | |
1478 | add_cref (name, abfd, section, value); | |
1479 | ||
b34976b6 | 1480 | return TRUE; |
252b5132 | 1481 | } |