Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
dab69f68 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
f96b4a7b | 7 | This file is part of the GNU Binutils. |
252b5132 | 8 | |
f96b4a7b | 9 | This program is free software; you can redistribute it and/or modify |
2fa9fc65 | 10 | it under the terms of the GNU General Public License as published by |
f96b4a7b NC |
11 | the Free Software Foundation; either version 3 of the License, or |
12 | (at your option) any later version. | |
252b5132 | 13 | |
f96b4a7b | 14 | This program is distributed in the hope that it will be useful, |
2fa9fc65 NC |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
252b5132 | 18 | |
2fa9fc65 | 19 | You should have received a copy of the GNU General Public License |
f96b4a7b NC |
20 | along with this program; if not, write to the Free Software |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
252b5132 | 23 | |
252b5132 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
3882b010 | 26 | #include "safe-ctype.h" |
252b5132 RH |
27 | #include "libiberty.h" |
28 | #include "progress.h" | |
29 | #include "bfdlink.h" | |
5af11cab | 30 | #include "filenames.h" |
252b5132 RH |
31 | |
32 | #include "ld.h" | |
33 | #include "ldmain.h" | |
34 | #include "ldmisc.h" | |
35 | #include "ldwrite.h" | |
252b5132 RH |
36 | #include "ldexp.h" |
37 | #include "ldlang.h" | |
df2a7313 | 38 | #include <ldgram.h> |
252b5132 RH |
39 | #include "ldlex.h" |
40 | #include "ldfile.h" | |
b71e2778 | 41 | #include "ldemul.h" |
252b5132 | 42 | #include "ldctor.h" |
5d3236ee DK |
43 | #ifdef ENABLE_PLUGINS |
44 | #include "plugin.h" | |
45 | #include "plugin-api.h" | |
46 | #include "libbfd.h" | |
47 | #endif /* ENABLE_PLUGINS */ | |
252b5132 | 48 | |
0125cdf2 | 49 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
50 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
51 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
52 | #endif | |
53 | ||
54 | #include <string.h> | |
55 | ||
56 | #ifdef HAVE_SBRK | |
502bdb00 | 57 | #if !HAVE_DECL_SBRK |
1579bae1 | 58 | extern void *sbrk (); |
252b5132 RH |
59 | #endif |
60 | #endif | |
61 | ||
9c8ebd6a DJ |
62 | #ifndef TARGET_SYSTEM_ROOT |
63 | #define TARGET_SYSTEM_ROOT "" | |
64 | #endif | |
65 | ||
252b5132 RH |
66 | /* EXPORTS */ |
67 | ||
53d25da6 AM |
68 | FILE *saved_script_handle = NULL; |
69 | FILE *previous_script_handle = NULL; | |
70 | bfd_boolean force_make_executable = FALSE; | |
71 | ||
252b5132 RH |
72 | char *default_target; |
73 | const char *output_filename = "a.out"; | |
74 | ||
75 | /* Name this program was invoked by. */ | |
76 | char *program_name; | |
77 | ||
9c8ebd6a | 78 | /* The prefix for system library directories. */ |
e2243057 | 79 | const char *ld_sysroot; |
9c8ebd6a | 80 | |
3fe38064 NC |
81 | /* The canonical representation of ld_sysroot. */ |
82 | char * ld_canon_sysroot; | |
83 | int ld_canon_sysroot_len; | |
84 | ||
252b5132 RH |
85 | /* Set by -G argument, for MIPS ECOFF target. */ |
86 | int g_switch_value = 8; | |
87 | ||
88 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 89 | bfd_boolean trace_files; |
252b5132 | 90 | |
cd6f1cf3 NC |
91 | /* Nonzero means report actions taken by the linker, and describe the linker script in use. */ |
92 | bfd_boolean verbose; | |
252b5132 RH |
93 | |
94 | /* Nonzero means version number was printed, so exit successfully | |
95 | instead of complaining if no input files are given. */ | |
b34976b6 | 96 | bfd_boolean version_printed; |
252b5132 | 97 | |
b34976b6 AM |
98 | /* TRUE if we should demangle symbol names. */ |
99 | bfd_boolean demangling; | |
252b5132 RH |
100 | |
101 | args_type command_line; | |
102 | ||
103 | ld_config_type config; | |
104 | ||
bcaa7b3e L |
105 | sort_type sort_section; |
106 | ||
e2243057 RS |
107 | static const char *get_sysroot |
108 | (int, char **); | |
0125cdf2 | 109 | static char *get_emulation |
1579bae1 | 110 | (int, char **); |
0125cdf2 | 111 | static bfd_boolean add_archive_element |
5d3236ee | 112 | (struct bfd_link_info *, bfd *, const char *, bfd **); |
0125cdf2 | 113 | static bfd_boolean multiple_definition |
24f58f47 | 114 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
1579bae1 | 115 | bfd *, asection *, bfd_vma); |
0125cdf2 | 116 | static bfd_boolean multiple_common |
24f58f47 AM |
117 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
118 | bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 119 | static bfd_boolean add_to_set |
1579bae1 AM |
120 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
121 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 122 | static bfd_boolean constructor_callback |
1579bae1 AM |
123 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
124 | asection *, bfd_vma); | |
0125cdf2 | 125 | static bfd_boolean warning_callback |
1579bae1 AM |
126 | (struct bfd_link_info *, const char *, const char *, bfd *, |
127 | asection *, bfd_vma); | |
0125cdf2 | 128 | static void warning_find_reloc |
1579bae1 | 129 | (bfd *, asection *, void *); |
0125cdf2 | 130 | static bfd_boolean undefined_symbol |
1579bae1 AM |
131 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
132 | bfd_boolean); | |
0125cdf2 | 133 | static bfd_boolean reloc_overflow |
dfeffb9f L |
134 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
135 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 136 | static bfd_boolean reloc_dangerous |
1579bae1 | 137 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 138 | static bfd_boolean unattached_reloc |
1579bae1 | 139 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 140 | static bfd_boolean notice |
35ed3f94 | 141 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
16d96b5b | 142 | bfd *, asection *, bfd_vma, flagword, const char *); |
0125cdf2 NC |
143 | |
144 | static struct bfd_link_callbacks link_callbacks = | |
145 | { | |
252b5132 RH |
146 | add_archive_element, |
147 | multiple_definition, | |
148 | multiple_common, | |
149 | add_to_set, | |
150 | constructor_callback, | |
151 | warning_callback, | |
152 | undefined_symbol, | |
153 | reloc_overflow, | |
154 | reloc_dangerous, | |
155 | unattached_reloc, | |
e1fffbe6 | 156 | notice, |
2889e75b | 157 | einfo, |
49fa1e15 AM |
158 | info_msg, |
159 | minfo, | |
2889e75b | 160 | ldlang_override_segment_assignment |
252b5132 RH |
161 | }; |
162 | ||
3b66a141 HPN |
163 | static bfd_assert_handler_type default_bfd_assert_handler; |
164 | ||
252b5132 RH |
165 | struct bfd_link_info link_info; |
166 | \f | |
167 | static void | |
498cd2a0 | 168 | ld_cleanup (void) |
252b5132 | 169 | { |
498cd2a0 AM |
170 | bfd_cache_close_all (); |
171 | #ifdef ENABLE_PLUGINS | |
172 | plugin_call_cleanup (); | |
173 | #endif | |
174 | if (output_filename && delete_output_file_on_failure) | |
175 | unlink_if_ordinary (output_filename); | |
252b5132 RH |
176 | } |
177 | ||
3b66a141 HPN |
178 | /* If there's a BFD assertion, we'll notice and exit with an error |
179 | unless otherwise instructed. */ | |
180 | ||
181 | static void | |
182 | ld_bfd_assert_handler (const char *fmt, const char *bfdver, | |
183 | const char *file, int line) | |
184 | { | |
185 | (*default_bfd_assert_handler) (fmt, bfdver, file, line); | |
186 | config.make_executable = FALSE; | |
187 | } | |
188 | ||
252b5132 | 189 | int |
1579bae1 | 190 | main (int argc, char **argv) |
252b5132 RH |
191 | { |
192 | char *emulation; | |
193 | long start_time = get_run_time (); | |
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; | |
263 | ||
b34976b6 | 264 | command_line.warn_mismatch = TRUE; |
fe7929ce | 265 | command_line.warn_search_mismatch = TRUE; |
02b0b1aa | 266 | command_line.check_section_addresses = -1; |
28d5f677 | 267 | command_line.disable_target_specific_optimizations = -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; |
e0076ab3 | 288 | link_info.pei386_auto_import = -1; |
db6751f2 | 289 | link_info.spare_dynamic_tags = 5; |
967928e9 | 290 | link_info.path_separator = ':'; |
24718e3b | 291 | |
252b5132 | 292 | ldfile_add_arch (""); |
252b5132 RH |
293 | emulation = get_emulation (argc, argv); |
294 | ldemul_choose_mode (emulation); | |
742aeb63 | 295 | default_target = ldemul_choose_target (argc, argv); |
8be573a7 AM |
296 | config.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
297 | config.commonpagesize = bfd_emul_get_commonpagesize (default_target); | |
252b5132 RH |
298 | lang_init (); |
299 | ldemul_before_parse (); | |
b34976b6 | 300 | lang_has_input_file = FALSE; |
252b5132 RH |
301 | parse_args (argc, argv); |
302 | ||
2d643429 NC |
303 | if (config.hash_table_size != 0) |
304 | bfd_hash_set_default_size (config.hash_table_size); | |
305 | ||
9bbc1a67 AM |
306 | #ifdef ENABLE_PLUGINS |
307 | /* Now all the plugin arguments have been gathered, we can load them. */ | |
308 | if (plugin_load_plugins ()) | |
309 | einfo (_("%P%F: %s: error loading plugin\n"), plugin_error_plugin ()); | |
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 | ||
b34976b6 | 381 | if (!lang_has_input_file) |
252b5132 | 382 | { |
30824704 | 383 | if (version_printed || command_line.print_output_format) |
252b5132 RH |
384 | xexit (0); |
385 | einfo (_("%P%F: no input files\n")); | |
386 | } | |
387 | ||
388 | if (trace_files) | |
0125cdf2 | 389 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
390 | |
391 | ldemul_after_parse (); | |
392 | ||
252b5132 RH |
393 | if (config.map_filename) |
394 | { | |
395 | if (strcmp (config.map_filename, "-") == 0) | |
396 | { | |
397 | config.map_file = stdout; | |
398 | } | |
399 | else | |
400 | { | |
401 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
402 | if (config.map_file == (FILE *) NULL) | |
403 | { | |
404 | bfd_set_error (bfd_error_system_call); | |
405 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
406 | config.map_filename); | |
407 | } | |
408 | } | |
409 | } | |
410 | ||
252b5132 RH |
411 | lang_process (); |
412 | ||
413 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 414 | symbols, and possibly multiple definitions. */ |
1049f94e | 415 | if (link_info.relocatable) |
f13a99db | 416 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 417 | else |
f13a99db | 418 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
419 | |
420 | ldwrite (); | |
421 | ||
422 | if (config.map_file != NULL) | |
423 | lang_map (); | |
424 | if (command_line.cref) | |
425 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
426 | if (nocrossref_list != NULL) | |
427 | check_nocrossrefs (); | |
428 | ||
750877ba L |
429 | lang_finish (); |
430 | ||
1049f94e | 431 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 432 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 433 | want to ignore for relocatable output?) */ |
b34976b6 | 434 | if (!config.make_executable && !force_make_executable) |
252b5132 | 435 | { |
b34976b6 | 436 | if (trace_files) |
0125cdf2 NC |
437 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
438 | output_filename); | |
252b5132 | 439 | |
4309cbf2 | 440 | /* The file will be removed by ld_cleanup. */ |
252b5132 RH |
441 | xexit (1); |
442 | } | |
443 | else | |
444 | { | |
f13a99db AM |
445 | if (! bfd_close (link_info.output_bfd)) |
446 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
447 | |
448 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
449 | executable file and it doesn't end in .exe, copy it to one |
450 | which does. */ | |
1049f94e | 451 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
452 | { |
453 | int len = strlen (output_filename); | |
0125cdf2 | 454 | |
6d5e62f8 | 455 | if (len < 4 |
252b5132 RH |
456 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
457 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
458 | { | |
459 | FILE *src; | |
460 | FILE *dst; | |
461 | const int bsize = 4096; | |
1e9cc1c2 | 462 | char *buf = (char *) xmalloc (bsize); |
252b5132 | 463 | int l; |
1e9cc1c2 | 464 | char *dst_name = (char *) xmalloc (len + 5); |
0125cdf2 | 465 | |
252b5132 RH |
466 | strcpy (dst_name, output_filename); |
467 | strcat (dst_name, ".exe"); | |
468 | src = fopen (output_filename, FOPEN_RB); | |
469 | dst = fopen (dst_name, FOPEN_WB); | |
470 | ||
471 | if (!src) | |
1579bae1 AM |
472 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
473 | output_filename); | |
252b5132 | 474 | if (!dst) |
1579bae1 AM |
475 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
476 | dst_name); | |
252b5132 RH |
477 | while ((l = fread (buf, 1, bsize, src)) > 0) |
478 | { | |
479 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 480 | |
252b5132 | 481 | if (done != l) |
0125cdf2 | 482 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 483 | } |
0125cdf2 | 484 | |
252b5132 RH |
485 | fclose (src); |
486 | if (fclose (dst) == EOF) | |
0125cdf2 | 487 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
488 | free (dst_name); |
489 | free (buf); | |
490 | } | |
491 | } | |
492 | } | |
493 | ||
494 | END_PROGRESS (program_name); | |
495 | ||
496 | if (config.stats) | |
497 | { | |
498 | #ifdef HAVE_SBRK | |
1e9cc1c2 | 499 | char *lim = (char *) sbrk (0); |
252b5132 RH |
500 | #endif |
501 | long run_time = get_run_time () - start_time; | |
502 | ||
e922bcab | 503 | fflush (stdout); |
252b5132 RH |
504 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
505 | program_name, run_time / 1000000, run_time % 1000000); | |
506 | #ifdef HAVE_SBRK | |
507 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
508 | (long) (lim - (char *) &environ)); | |
509 | #endif | |
e922bcab | 510 | fflush (stderr); |
252b5132 RH |
511 | } |
512 | ||
4309cbf2 | 513 | /* Prevent ld_cleanup from doing anything, after a successful link. */ |
252b5132 RH |
514 | output_filename = NULL; |
515 | ||
516 | xexit (0); | |
517 | return 0; | |
518 | } | |
519 | ||
e2243057 RS |
520 | /* If the configured sysroot is relocatable, try relocating it based on |
521 | default prefix FROM. Return the relocated directory if it exists, | |
522 | otherwise return null. */ | |
523 | ||
524 | static char * | |
525 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
526 | { | |
527 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
528 | char *path; | |
529 | struct stat s; | |
530 | ||
531 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
532 | if (path) | |
533 | { | |
534 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
535 | return path; | |
536 | free (path); | |
537 | } | |
538 | #endif | |
539 | return 0; | |
540 | } | |
541 | ||
542 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
543 | ||
544 | static const char * | |
545 | get_sysroot (int argc, char **argv) | |
546 | { | |
547 | int i; | |
548 | const char *path; | |
549 | ||
550 | for (i = 1; i < argc; i++) | |
0112cd26 | 551 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
552 | return argv[i] + strlen ("--sysroot="); |
553 | ||
554 | path = get_relative_sysroot (BINDIR); | |
555 | if (path) | |
556 | return path; | |
557 | ||
558 | path = get_relative_sysroot (TOOLBINDIR); | |
559 | if (path) | |
560 | return path; | |
561 | ||
562 | return TARGET_SYSTEM_ROOT; | |
563 | } | |
564 | ||
252b5132 RH |
565 | /* We need to find any explicitly given emulation in order to initialize the |
566 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
567 | ||
568 | static char * | |
1579bae1 | 569 | get_emulation (int argc, char **argv) |
252b5132 RH |
570 | { |
571 | char *emulation; | |
572 | int i; | |
573 | ||
574 | emulation = getenv (EMULATION_ENVIRON); | |
575 | if (emulation == NULL) | |
576 | emulation = DEFAULT_EMULATION; | |
577 | ||
578 | for (i = 1; i < argc; i++) | |
579 | { | |
0112cd26 | 580 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
581 | { |
582 | if (argv[i][2] == '\0') | |
583 | { | |
584 | /* -m EMUL */ | |
585 | if (i < argc - 1) | |
586 | { | |
587 | emulation = argv[i + 1]; | |
588 | i++; | |
589 | } | |
590 | else | |
0125cdf2 | 591 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
592 | } |
593 | else if (strcmp (argv[i], "-mips1") == 0 | |
594 | || strcmp (argv[i], "-mips2") == 0 | |
595 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 596 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
597 | || strcmp (argv[i], "-mips5") == 0 |
598 | || strcmp (argv[i], "-mips32") == 0 | |
599 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
600 | || strcmp (argv[i], "-mips64") == 0 |
601 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 602 | { |
31d677f9 | 603 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
604 | passed to the linker by some MIPS compilers. They |
605 | generally tell the linker to use a slightly different | |
606 | library path. Perhaps someday these should be | |
607 | implemented as emulations; until then, we just ignore | |
608 | the arguments and hope that nobody ever creates | |
609 | emulations named ips1, ips2 or ips3. */ | |
610 | } | |
611 | else if (strcmp (argv[i], "-m486") == 0) | |
612 | { | |
613 | /* FIXME: The argument -m486 is passed to the linker on | |
614 | some Linux systems. Hope that nobody creates an | |
615 | emulation named 486. */ | |
616 | } | |
617 | else | |
618 | { | |
619 | /* -mEMUL */ | |
620 | emulation = &argv[i][2]; | |
621 | } | |
622 | } | |
623 | } | |
624 | ||
625 | return emulation; | |
626 | } | |
627 | ||
252b5132 | 628 | void |
1579bae1 | 629 | add_ysym (const char *name) |
252b5132 | 630 | { |
1579bae1 | 631 | if (link_info.notice_hash == NULL) |
252b5132 | 632 | { |
1e9cc1c2 NC |
633 | link_info.notice_hash = |
634 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
635 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
636 | bfd_hash_newfunc, | |
637 | sizeof (struct bfd_hash_entry), | |
638 | 61)) | |
252b5132 | 639 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 640 | } |
252b5132 | 641 | |
1579bae1 | 642 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
643 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
644 | } | |
645 | ||
646 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
647 | ||
648 | void | |
1579bae1 | 649 | add_wrap (const char *name) |
252b5132 RH |
650 | { |
651 | if (link_info.wrap_hash == NULL) | |
652 | { | |
1e9cc1c2 NC |
653 | link_info.wrap_hash = |
654 | (struct bfd_hash_table *) xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
655 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
656 | bfd_hash_newfunc, | |
657 | sizeof (struct bfd_hash_entry), | |
658 | 61)) | |
252b5132 RH |
659 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
660 | } | |
0125cdf2 | 661 | |
b34976b6 | 662 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
663 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
664 | } | |
665 | ||
666 | /* Handle the -retain-symbols-file option. */ | |
667 | ||
668 | void | |
1579bae1 | 669 | add_keepsyms_file (const char *filename) |
252b5132 RH |
670 | { |
671 | FILE *file; | |
672 | char *buf; | |
673 | size_t bufsize; | |
674 | int c; | |
675 | ||
676 | if (link_info.strip == strip_some) | |
677 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
678 | ||
679 | file = fopen (filename, "r"); | |
1579bae1 | 680 | if (file == NULL) |
252b5132 RH |
681 | { |
682 | bfd_set_error (bfd_error_system_call); | |
683 | einfo ("%X%P: %s: %E\n", filename); | |
684 | return; | |
685 | } | |
686 | ||
1e9cc1c2 NC |
687 | link_info.keep_hash = (struct bfd_hash_table *) |
688 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
689 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
690 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
691 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
692 | ||
693 | bufsize = 100; | |
1e9cc1c2 | 694 | buf = (char *) xmalloc (bufsize); |
252b5132 RH |
695 | |
696 | c = getc (file); | |
697 | while (c != EOF) | |
698 | { | |
3882b010 | 699 | while (ISSPACE (c)) |
252b5132 RH |
700 | c = getc (file); |
701 | ||
702 | if (c != EOF) | |
703 | { | |
704 | size_t len = 0; | |
705 | ||
3882b010 | 706 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
707 | { |
708 | buf[len] = c; | |
709 | ++len; | |
710 | if (len >= bufsize) | |
711 | { | |
712 | bufsize *= 2; | |
1e9cc1c2 | 713 | buf = (char *) xrealloc (buf, bufsize); |
252b5132 RH |
714 | } |
715 | c = getc (file); | |
716 | } | |
717 | ||
718 | buf[len] = '\0'; | |
719 | ||
1579bae1 | 720 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
721 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
722 | } | |
723 | } | |
724 | ||
725 | if (link_info.strip != strip_none) | |
726 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
727 | ||
5ed6aba4 | 728 | free (buf); |
252b5132 RH |
729 | link_info.strip = strip_some; |
730 | } | |
731 | \f | |
732 | /* Callbacks from the BFD linker routines. */ | |
733 | ||
734 | /* This is called when BFD has decided to include an archive member in | |
735 | a link. */ | |
736 | ||
b34976b6 | 737 | static bfd_boolean |
e1fffbe6 | 738 | add_archive_element (struct bfd_link_info *info, |
1579bae1 | 739 | bfd *abfd, |
5d3236ee DK |
740 | const char *name, |
741 | bfd **subsbfd ATTRIBUTE_UNUSED) | |
252b5132 RH |
742 | { |
743 | lang_input_statement_type *input; | |
5d3236ee | 744 | lang_input_statement_type orig_input; |
252b5132 | 745 | |
1e9cc1c2 NC |
746 | input = (lang_input_statement_type *) |
747 | xcalloc (1, sizeof (lang_input_statement_type)); | |
252b5132 RH |
748 | input->filename = abfd->filename; |
749 | input->local_sym_name = abfd->filename; | |
750 | input->the_bfd = abfd; | |
252b5132 | 751 | |
5d3236ee DK |
752 | /* Save the original data for trace files/tries below, as plugins |
753 | (if enabled) may possibly alter it to point to a replacement | |
754 | BFD, but we still want to output the original BFD filename. */ | |
755 | orig_input = *input; | |
756 | #ifdef ENABLE_PLUGINS | |
2b7e4308 | 757 | if (plugin_active_plugins_p () && !no_more_claiming) |
5d3236ee DK |
758 | { |
759 | /* We must offer this archive member to the plugins to claim. */ | |
2b7e4308 L |
760 | const char *filename = (bfd_my_archive (abfd) != NULL |
761 | ? bfd_my_archive (abfd)->filename : abfd->filename); | |
762 | int fd = open (filename, O_RDONLY | O_BINARY); | |
5d3236ee DK |
763 | if (fd >= 0) |
764 | { | |
765 | struct ld_plugin_input_file file; | |
02d00247 | 766 | |
5d3236ee DK |
767 | /* Offset and filesize must refer to the individual archive |
768 | member, not the whole file, and must exclude the header. | |
769 | Fortunately for us, that is how the data is stored in the | |
770 | origin field of the bfd and in the arelt_data. */ | |
2b7e4308 | 771 | file.name = filename; |
5d3236ee DK |
772 | file.offset = abfd->origin; |
773 | file.filesize = arelt_size (abfd); | |
774 | file.fd = fd; | |
02d00247 | 775 | plugin_maybe_claim (&file, input); |
66be1055 | 776 | if (input->flags.claimed) |
5d3236ee | 777 | { |
66be1055 | 778 | input->flags.claim_archive = TRUE; |
5d3236ee DK |
779 | *subsbfd = input->the_bfd; |
780 | } | |
5d3236ee DK |
781 | } |
782 | } | |
783 | #endif /* ENABLE_PLUGINS */ | |
784 | ||
252b5132 RH |
785 | ldlang_add_file (input); |
786 | ||
1579bae1 | 787 | if (config.map_file != NULL) |
252b5132 | 788 | { |
b34976b6 | 789 | static bfd_boolean header_printed; |
252b5132 RH |
790 | struct bfd_link_hash_entry *h; |
791 | bfd *from; | |
792 | int len; | |
793 | ||
e1fffbe6 | 794 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
795 | |
796 | if (h == NULL) | |
797 | from = NULL; | |
798 | else | |
799 | { | |
800 | switch (h->type) | |
801 | { | |
802 | default: | |
803 | from = NULL; | |
804 | break; | |
805 | ||
806 | case bfd_link_hash_defined: | |
807 | case bfd_link_hash_defweak: | |
808 | from = h->u.def.section->owner; | |
809 | break; | |
810 | ||
811 | case bfd_link_hash_undefined: | |
812 | case bfd_link_hash_undefweak: | |
813 | from = h->u.undef.abfd; | |
814 | break; | |
815 | ||
816 | case bfd_link_hash_common: | |
817 | from = h->u.c.p->section->owner; | |
818 | break; | |
819 | } | |
820 | } | |
821 | ||
822 | if (! header_printed) | |
823 | { | |
824 | char buf[100]; | |
825 | ||
e3c8793a | 826 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 827 | minfo ("%s", buf); |
b34976b6 | 828 | header_printed = TRUE; |
252b5132 RH |
829 | } |
830 | ||
831 | if (bfd_my_archive (abfd) == NULL) | |
832 | { | |
833 | minfo ("%s", bfd_get_filename (abfd)); | |
834 | len = strlen (bfd_get_filename (abfd)); | |
835 | } | |
836 | else | |
837 | { | |
838 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
839 | bfd_get_filename (abfd)); | |
840 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
841 | + strlen (bfd_get_filename (abfd)) | |
842 | + 2); | |
843 | } | |
844 | ||
845 | if (len >= 29) | |
846 | { | |
847 | print_nl (); | |
848 | len = 0; | |
849 | } | |
850 | while (len < 30) | |
851 | { | |
852 | print_space (); | |
853 | ++len; | |
854 | } | |
855 | ||
856 | if (from != NULL) | |
857 | minfo ("%B ", from); | |
858 | if (h != NULL) | |
859 | minfo ("(%T)\n", h->root.string); | |
860 | else | |
861 | minfo ("(%s)\n", name); | |
862 | } | |
863 | ||
cd6f1cf3 | 864 | if (trace_files || verbose) |
5d3236ee | 865 | info_msg ("%I\n", &orig_input); |
b34976b6 | 866 | return TRUE; |
252b5132 RH |
867 | } |
868 | ||
869 | /* This is called when BFD has discovered a symbol which is defined | |
870 | multiple times. */ | |
871 | ||
b34976b6 | 872 | static bfd_boolean |
24f58f47 AM |
873 | multiple_definition (struct bfd_link_info *info, |
874 | struct bfd_link_hash_entry *h, | |
1579bae1 AM |
875 | bfd *nbfd, |
876 | asection *nsec, | |
877 | bfd_vma nval) | |
252b5132 | 878 | { |
24f58f47 AM |
879 | const char *name; |
880 | bfd *obfd; | |
881 | asection *osec; | |
882 | bfd_vma oval; | |
883 | ||
884 | if (info->allow_multiple_definition) | |
885 | return TRUE; | |
886 | ||
887 | switch (h->type) | |
888 | { | |
889 | case bfd_link_hash_defined: | |
890 | osec = h->u.def.section; | |
891 | oval = h->u.def.value; | |
892 | obfd = h->u.def.section->owner; | |
893 | break; | |
894 | case bfd_link_hash_indirect: | |
895 | osec = bfd_ind_section_ptr; | |
896 | oval = 0; | |
897 | obfd = NULL; | |
898 | break; | |
899 | default: | |
900 | abort (); | |
901 | } | |
902 | ||
903 | /* Ignore a redefinition of an absolute symbol to the | |
904 | same value; it's harmless. */ | |
905 | if (h->type == bfd_link_hash_defined | |
906 | && bfd_is_abs_section (osec) | |
907 | && bfd_is_abs_section (nsec) | |
908 | && nval == oval) | |
909 | return TRUE; | |
910 | ||
252b5132 RH |
911 | /* If either section has the output_section field set to |
912 | bfd_abs_section_ptr, it means that the section is being | |
913 | discarded, and this is not really a multiple definition at all. | |
9e2278f5 AM |
914 | FIXME: It would be cleaner to somehow ignore symbols defined in |
915 | sections which are being discarded. */ | |
252b5132 RH |
916 | if ((osec->output_section != NULL |
917 | && ! bfd_is_abs_section (osec) | |
918 | && bfd_is_abs_section (osec->output_section)) | |
919 | || (nsec->output_section != NULL | |
920 | && ! bfd_is_abs_section (nsec) | |
921 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 922 | return TRUE; |
252b5132 | 923 | |
24f58f47 AM |
924 | name = h->root.string; |
925 | if (nbfd == NULL) | |
926 | { | |
927 | nbfd = obfd; | |
928 | nsec = osec; | |
929 | nval = oval; | |
930 | obfd = NULL; | |
931 | } | |
252b5132 RH |
932 | einfo (_("%X%C: multiple definition of `%T'\n"), |
933 | nbfd, nsec, nval, name); | |
1579bae1 | 934 | if (obfd != NULL) |
252b5132 | 935 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 | 936 | |
28d5f677 | 937 | if (RELAXATION_ENABLED) |
9b14b192 NC |
938 | { |
939 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
28d5f677 | 940 | command_line.disable_target_specific_optimizations = -1; |
9b14b192 | 941 | } |
6d5e62f8 | 942 | |
b34976b6 | 943 | return TRUE; |
252b5132 RH |
944 | } |
945 | ||
946 | /* This is called when there is a definition of a common symbol, or | |
947 | when a common symbol is found for a symbol that is already defined, | |
948 | or when two common symbols are found. We only do something if | |
949 | -warn-common was used. */ | |
950 | ||
b34976b6 | 951 | static bfd_boolean |
1579bae1 | 952 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
24f58f47 | 953 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
954 | bfd *nbfd, |
955 | enum bfd_link_hash_type ntype, | |
956 | bfd_vma nsize) | |
252b5132 | 957 | { |
24f58f47 AM |
958 | const char *name; |
959 | bfd *obfd; | |
960 | enum bfd_link_hash_type otype; | |
961 | bfd_vma osize; | |
962 | ||
963 | if (!config.warn_common) | |
b34976b6 | 964 | return TRUE; |
252b5132 | 965 | |
24f58f47 AM |
966 | name = h->root.string; |
967 | otype = h->type; | |
968 | if (otype == bfd_link_hash_common) | |
969 | { | |
970 | obfd = h->u.c.p->section->owner; | |
971 | osize = h->u.c.size; | |
972 | } | |
973 | else if (otype == bfd_link_hash_defined | |
974 | || otype == bfd_link_hash_defweak) | |
975 | { | |
976 | obfd = h->u.def.section->owner; | |
977 | osize = 0; | |
978 | } | |
979 | else | |
980 | { | |
981 | /* FIXME: It would nice if we could report the BFD which defined | |
982 | an indirect symbol, but we don't have anywhere to store the | |
983 | information. */ | |
984 | obfd = NULL; | |
985 | osize = 0; | |
986 | } | |
987 | ||
252b5132 RH |
988 | if (ntype == bfd_link_hash_defined |
989 | || ntype == bfd_link_hash_defweak | |
990 | || ntype == bfd_link_hash_indirect) | |
991 | { | |
992 | ASSERT (otype == bfd_link_hash_common); | |
993 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
994 | nbfd, name); | |
995 | if (obfd != NULL) | |
996 | einfo (_("%B: warning: common is here\n"), obfd); | |
997 | } | |
998 | else if (otype == bfd_link_hash_defined | |
999 | || otype == bfd_link_hash_defweak | |
1000 | || otype == bfd_link_hash_indirect) | |
1001 | { | |
1002 | ASSERT (ntype == bfd_link_hash_common); | |
1003 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1004 | nbfd, name); | |
1005 | if (obfd != NULL) | |
1006 | einfo (_("%B: warning: defined here\n"), obfd); | |
1007 | } | |
1008 | else | |
1009 | { | |
1010 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1011 | if (osize > nsize) | |
1012 | { | |
1013 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1014 | nbfd, name); | |
1015 | if (obfd != NULL) | |
1016 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1017 | } | |
1018 | else if (nsize > osize) | |
1019 | { | |
1020 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1021 | nbfd, name); | |
1022 | if (obfd != NULL) | |
1023 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1028 | if (obfd != NULL) | |
1029 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1030 | } | |
1031 | } | |
1032 | ||
b34976b6 | 1033 | return TRUE; |
252b5132 RH |
1034 | } |
1035 | ||
1036 | /* This is called when BFD has discovered a set element. H is the | |
1037 | entry in the linker hash table for the set. SECTION and VALUE | |
1038 | represent a value which should be added to the set. */ | |
1039 | ||
b34976b6 | 1040 | static bfd_boolean |
1579bae1 AM |
1041 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1042 | struct bfd_link_hash_entry *h, | |
1043 | bfd_reloc_code_real_type reloc, | |
1044 | bfd *abfd, | |
1045 | asection *section, | |
1046 | bfd_vma value) | |
252b5132 RH |
1047 | { |
1048 | if (config.warn_constructors) | |
1049 | einfo (_("%P: warning: global constructor %s used\n"), | |
1050 | h->root.string); | |
1051 | ||
1052 | if (! config.build_constructors) | |
b34976b6 | 1053 | return TRUE; |
252b5132 | 1054 | |
1579bae1 | 1055 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1056 | |
1057 | if (h->type == bfd_link_hash_new) | |
1058 | { | |
1059 | h->type = bfd_link_hash_undefined; | |
1060 | h->u.undef.abfd = abfd; | |
1061 | /* We don't call bfd_link_add_undef to add this to the list of | |
1062 | undefined symbols because we are going to define it | |
1063 | ourselves. */ | |
1064 | } | |
1065 | ||
b34976b6 | 1066 | return TRUE; |
252b5132 RH |
1067 | } |
1068 | ||
1069 | /* This is called when BFD has discovered a constructor. This is only | |
1070 | called for some object file formats--those which do not handle | |
1071 | constructors in some more clever fashion. This is similar to | |
1072 | adding an element to a set, but less general. */ | |
1073 | ||
b34976b6 | 1074 | static bfd_boolean |
1579bae1 AM |
1075 | constructor_callback (struct bfd_link_info *info, |
1076 | bfd_boolean constructor, | |
1077 | const char *name, | |
1078 | bfd *abfd, | |
1079 | asection *section, | |
1080 | bfd_vma value) | |
252b5132 RH |
1081 | { |
1082 | char *s; | |
1083 | struct bfd_link_hash_entry *h; | |
1084 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1085 | ||
1086 | if (config.warn_constructors) | |
1087 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1088 | ||
1089 | if (! config.build_constructors) | |
b34976b6 | 1090 | return TRUE; |
252b5132 RH |
1091 | |
1092 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1093 | useful error message. */ | |
f13a99db | 1094 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1095 | && (info->relocatable |
252b5132 RH |
1096 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1097 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1098 | ||
1099 | s = set_name; | |
1100 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1101 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1102 | if (constructor) | |
1103 | strcpy (s, "__CTOR_LIST__"); | |
1104 | else | |
1105 | strcpy (s, "__DTOR_LIST__"); | |
1106 | ||
b34976b6 | 1107 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1108 | if (h == (struct bfd_link_hash_entry *) NULL) |
1109 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1110 | if (h->type == bfd_link_hash_new) | |
1111 | { | |
1112 | h->type = bfd_link_hash_undefined; | |
1113 | h->u.undef.abfd = abfd; | |
1114 | /* We don't call bfd_link_add_undef to add this to the list of | |
1115 | undefined symbols because we are going to define it | |
1116 | ourselves. */ | |
1117 | } | |
1118 | ||
1119 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1120 | return TRUE; |
252b5132 RH |
1121 | } |
1122 | ||
1123 | /* A structure used by warning_callback to pass information through | |
1124 | bfd_map_over_sections. */ | |
1125 | ||
0125cdf2 NC |
1126 | struct warning_callback_info |
1127 | { | |
b34976b6 | 1128 | bfd_boolean found; |
252b5132 RH |
1129 | const char *warning; |
1130 | const char *symbol; | |
1131 | asymbol **asymbols; | |
1132 | }; | |
1133 | ||
1134 | /* This is called when there is a reference to a warning symbol. */ | |
1135 | ||
b34976b6 | 1136 | static bfd_boolean |
1579bae1 AM |
1137 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1138 | const char *warning, | |
1139 | const char *symbol, | |
1140 | bfd *abfd, | |
1141 | asection *section, | |
1142 | bfd_vma address) | |
252b5132 RH |
1143 | { |
1144 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1145 | have a cleaner interface, but what? */ | |
1146 | if (! config.warn_multiple_gp | |
1147 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1148 | return TRUE; |
252b5132 RH |
1149 | |
1150 | if (section != NULL) | |
300475fe | 1151 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1152 | else if (abfd == NULL) |
300475fe | 1153 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1154 | else if (symbol == NULL) |
300475fe | 1155 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1156 | else |
1157 | { | |
91d6fa6a | 1158 | struct warning_callback_info cinfo; |
252b5132 RH |
1159 | |
1160 | /* Look through the relocs to see if we can find a plausible | |
1161 | address. */ | |
5c1d2f5f AM |
1162 | |
1163 | if (!bfd_generic_link_read_symbols (abfd)) | |
1164 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1165 | |
91d6fa6a NC |
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); | |
252b5132 | 1171 | |
91d6fa6a | 1172 | if (! cinfo.found) |
300475fe | 1173 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1174 | } |
1175 | ||
b34976b6 | 1176 | return TRUE; |
252b5132 RH |
1177 | } |
1178 | ||
1179 | /* This is called by warning_callback for each section. It checks the | |
1180 | relocs of the section to see if it can find a reference to the | |
1181 | symbol which triggered the warning. If it can, it uses the reloc | |
1182 | to give an error message with a file and line number. */ | |
1183 | ||
1184 | static void | |
1579bae1 | 1185 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1186 | { |
1e9cc1c2 | 1187 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
252b5132 RH |
1188 | long relsize; |
1189 | arelent **relpp; | |
1190 | long relcount; | |
1191 | arelent **p, **pend; | |
1192 | ||
1193 | if (info->found) | |
1194 | return; | |
1195 | ||
1196 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1197 | if (relsize < 0) | |
1198 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1199 | if (relsize == 0) | |
1200 | return; | |
1201 | ||
1e9cc1c2 | 1202 | relpp = (arelent **) xmalloc (relsize); |
252b5132 RH |
1203 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1204 | if (relcount < 0) | |
1205 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1206 | ||
1207 | p = relpp; | |
1208 | pend = p + relcount; | |
1209 | for (; p < pend && *p != NULL; p++) | |
1210 | { | |
1211 | arelent *q = *p; | |
1212 | ||
1213 | if (q->sym_ptr_ptr != NULL | |
1214 | && *q->sym_ptr_ptr != NULL | |
1215 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1216 | { | |
1217 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1218 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1219 | info->warning); | |
b34976b6 | 1220 | info->found = TRUE; |
252b5132 RH |
1221 | break; |
1222 | } | |
1223 | } | |
1224 | ||
1225 | free (relpp); | |
1226 | } | |
1227 | ||
1228 | /* This is called when an undefined symbol is found. */ | |
1229 | ||
b34976b6 | 1230 | static bfd_boolean |
1579bae1 AM |
1231 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1232 | const char *name, | |
1233 | bfd *abfd, | |
1234 | asection *section, | |
1235 | bfd_vma address, | |
0b28295d | 1236 | bfd_boolean error) |
252b5132 RH |
1237 | { |
1238 | static char *error_name; | |
1239 | static unsigned int error_count; | |
1240 | ||
1241 | #define MAX_ERRORS_IN_A_ROW 5 | |
1242 | ||
1243 | if (config.warn_once) | |
1244 | { | |
1245 | static struct bfd_hash_table *hash; | |
1246 | ||
1247 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1248 | if (hash == NULL) |
1249 | { | |
1e9cc1c2 NC |
1250 | hash = (struct bfd_hash_table *) |
1251 | xmalloc (sizeof (struct bfd_hash_table)); | |
66eb6687 AM |
1252 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1253 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1254 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1255 | } | |
1256 | ||
b34976b6 AM |
1257 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1258 | return TRUE; | |
252b5132 | 1259 | |
b34976b6 | 1260 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1261 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1262 | } | |
1263 | ||
1264 | /* We never print more than a reasonable number of errors in a row | |
1265 | for a single symbol. */ | |
1579bae1 | 1266 | if (error_name != NULL |
252b5132 RH |
1267 | && strcmp (name, error_name) == 0) |
1268 | ++error_count; | |
1269 | else | |
1270 | { | |
1271 | error_count = 0; | |
1579bae1 | 1272 | if (error_name != NULL) |
252b5132 | 1273 | free (error_name); |
d1b2b2dc | 1274 | error_name = xstrdup (name); |
252b5132 RH |
1275 | } |
1276 | ||
1277 | if (section != NULL) | |
1278 | { | |
1279 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1280 | { |
0b28295d ILT |
1281 | if (error) |
1282 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1283 | abfd, section, address, name); | |
1284 | else | |
1285 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1286 | abfd, section, address, name); | |
b6f29aaa | 1287 | } |
252b5132 | 1288 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1289 | { |
1290 | if (error) | |
1291 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1292 | abfd, section, address, name); | |
1293 | else | |
1294 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1295 | abfd, section, address, name); | |
1296 | } | |
1297 | else if (error) | |
1298 | einfo ("%X"); | |
252b5132 RH |
1299 | } |
1300 | else | |
1301 | { | |
1302 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1303 | { |
0b28295d ILT |
1304 | if (error) |
1305 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1306 | abfd, name); | |
1307 | else | |
1308 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1309 | abfd, name); | |
b6f29aaa | 1310 | } |
252b5132 | 1311 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1312 | { |
1313 | if (error) | |
1314 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1315 | abfd, name); | |
1316 | else | |
1317 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1318 | abfd, name); | |
1319 | } | |
1320 | else if (error) | |
1321 | einfo ("%X"); | |
252b5132 RH |
1322 | } |
1323 | ||
b34976b6 | 1324 | return TRUE; |
252b5132 RH |
1325 | } |
1326 | ||
8aae64e6 AO |
1327 | /* Counter to limit the number of relocation overflow error messages |
1328 | to print. Errors are printed as it is decremented. When it's | |
1329 | called and the counter is zero, a final message is printed | |
1330 | indicating more relocations were omitted. When it gets to -1, no | |
1331 | such errors are printed. If it's initially set to a value less | |
1332 | than -1, all such errors will be printed (--verbose does this). */ | |
1333 | ||
1334 | int overflow_cutoff_limit = 10; | |
1335 | ||
252b5132 RH |
1336 | /* This is called when a reloc overflows. */ |
1337 | ||
b34976b6 | 1338 | static bfd_boolean |
1579bae1 | 1339 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1340 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1341 | const char *name, |
1342 | const char *reloc_name, | |
1343 | bfd_vma addend, | |
1344 | bfd *abfd, | |
1345 | asection *section, | |
1346 | bfd_vma address) | |
252b5132 | 1347 | { |
8aae64e6 AO |
1348 | if (overflow_cutoff_limit == -1) |
1349 | return TRUE; | |
1350 | ||
270396f2 | 1351 | einfo ("%X%H:", abfd, section, address); |
8aae64e6 AO |
1352 | |
1353 | if (overflow_cutoff_limit >= 0 | |
1354 | && overflow_cutoff_limit-- == 0) | |
1355 | { | |
1356 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1357 | return TRUE; | |
1358 | } | |
1359 | ||
dfeffb9f L |
1360 | if (entry) |
1361 | { | |
1362 | while (entry->type == bfd_link_hash_indirect | |
1363 | || entry->type == bfd_link_hash_warning) | |
1364 | entry = entry->u.i.link; | |
1365 | switch (entry->type) | |
1366 | { | |
1367 | case bfd_link_hash_undefined: | |
1368 | case bfd_link_hash_undefweak: | |
1369 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1370 | reloc_name, entry->root.string); | |
1371 | break; | |
1372 | case bfd_link_hash_defined: | |
1373 | case bfd_link_hash_defweak: | |
1374 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1375 | reloc_name, entry->root.string, | |
a6e1b90f L |
1376 | entry->u.def.section, |
1377 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1378 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1379 | break; |
1380 | default: | |
1381 | abort (); | |
1382 | break; | |
1383 | } | |
1384 | } | |
1385 | else | |
1386 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1387 | reloc_name, name); | |
252b5132 RH |
1388 | if (addend != 0) |
1389 | einfo ("+%v", addend); | |
1390 | einfo ("\n"); | |
b34976b6 | 1391 | return TRUE; |
252b5132 RH |
1392 | } |
1393 | ||
1394 | /* This is called when a dangerous relocation is made. */ | |
1395 | ||
b34976b6 | 1396 | static bfd_boolean |
1579bae1 AM |
1397 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1398 | const char *message, | |
1399 | bfd *abfd, | |
1400 | asection *section, | |
1401 | bfd_vma address) | |
252b5132 | 1402 | { |
270396f2 | 1403 | einfo (_("%X%H: dangerous relocation: %s\n"), |
e1fffbe6 | 1404 | abfd, section, address, message); |
b34976b6 | 1405 | return TRUE; |
252b5132 RH |
1406 | } |
1407 | ||
1408 | /* This is called when a reloc is being generated attached to a symbol | |
1409 | that is not being output. */ | |
1410 | ||
b34976b6 | 1411 | static bfd_boolean |
1579bae1 AM |
1412 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1413 | const char *name, | |
1414 | bfd *abfd, | |
1415 | asection *section, | |
1416 | bfd_vma address) | |
252b5132 | 1417 | { |
270396f2 | 1418 | einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), |
e1fffbe6 | 1419 | abfd, section, address, name); |
b34976b6 | 1420 | return TRUE; |
252b5132 RH |
1421 | } |
1422 | ||
1423 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1424 | link_info.notice_hash is found. Symbols are put in notice_hash | |
5d3236ee DK |
1425 | using the -y option, while notice_all is set if the --cref option |
1426 | has been supplied, or if there are any NOCROSSREFS sections in the | |
1427 | linker script; and if plugins are active, since they need to monitor | |
1428 | all references from non-IR files. */ | |
252b5132 | 1429 | |
b34976b6 | 1430 | static bfd_boolean |
1579bae1 | 1431 | notice (struct bfd_link_info *info, |
35ed3f94 | 1432 | struct bfd_link_hash_entry *h, |
1579bae1 AM |
1433 | bfd *abfd, |
1434 | asection *section, | |
16d96b5b AM |
1435 | bfd_vma value, |
1436 | flagword flags ATTRIBUTE_UNUSED, | |
1437 | const char *string ATTRIBUTE_UNUSED) | |
252b5132 | 1438 | { |
35ed3f94 AM |
1439 | const char *name; |
1440 | ||
1441 | if (h == NULL) | |
5061a885 AM |
1442 | { |
1443 | if (command_line.cref || nocrossref_list != NULL) | |
1e9cc1c2 | 1444 | return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); |
5061a885 AM |
1445 | return TRUE; |
1446 | } | |
1447 | ||
35ed3f94 | 1448 | name = h->root.string; |
5d3236ee | 1449 | if (info->notice_hash != NULL |
9e2278f5 | 1450 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL) |
252b5132 RH |
1451 | { |
1452 | if (bfd_is_und_section (section)) | |
1453 | einfo ("%B: reference to %s\n", abfd, name); | |
1454 | else | |
1455 | einfo ("%B: definition of %s\n", abfd, name); | |
1456 | } | |
1457 | ||
1458 | if (command_line.cref || nocrossref_list != NULL) | |
1459 | add_cref (name, abfd, section, value); | |
1460 | ||
b34976b6 | 1461 | return TRUE; |
252b5132 | 1462 | } |