Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
f13a99db | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
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 RH |
42 | #include "ldctor.h" |
43 | ||
0125cdf2 | 44 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
45 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
46 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
47 | #endif | |
48 | ||
49 | #include <string.h> | |
50 | ||
51 | #ifdef HAVE_SBRK | |
502bdb00 | 52 | #if !HAVE_DECL_SBRK |
1579bae1 | 53 | extern void *sbrk (); |
252b5132 RH |
54 | #endif |
55 | #endif | |
56 | ||
9c8ebd6a DJ |
57 | #ifndef TARGET_SYSTEM_ROOT |
58 | #define TARGET_SYSTEM_ROOT "" | |
59 | #endif | |
60 | ||
252b5132 RH |
61 | /* EXPORTS */ |
62 | ||
53d25da6 AM |
63 | FILE *saved_script_handle = NULL; |
64 | FILE *previous_script_handle = NULL; | |
65 | bfd_boolean force_make_executable = FALSE; | |
66 | ||
252b5132 RH |
67 | char *default_target; |
68 | const char *output_filename = "a.out"; | |
69 | ||
70 | /* Name this program was invoked by. */ | |
71 | char *program_name; | |
72 | ||
9c8ebd6a | 73 | /* The prefix for system library directories. */ |
e2243057 | 74 | const char *ld_sysroot; |
9c8ebd6a | 75 | |
3fe38064 NC |
76 | /* The canonical representation of ld_sysroot. */ |
77 | char * ld_canon_sysroot; | |
78 | int ld_canon_sysroot_len; | |
79 | ||
252b5132 RH |
80 | /* Set by -G argument, for MIPS ECOFF target. */ |
81 | int g_switch_value = 8; | |
82 | ||
83 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 84 | bfd_boolean trace_files; |
252b5132 RH |
85 | |
86 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 87 | bfd_boolean trace_file_tries; |
252b5132 RH |
88 | |
89 | /* Nonzero means version number was printed, so exit successfully | |
90 | instead of complaining if no input files are given. */ | |
b34976b6 | 91 | bfd_boolean version_printed; |
252b5132 RH |
92 | |
93 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 94 | bfd_boolean whole_archive; |
252b5132 | 95 | |
4a43e768 AM |
96 | /* Nonzero means create DT_NEEDED entries only if a dynamic library |
97 | actually satisfies some reference in a regular object. */ | |
98 | bfd_boolean as_needed; | |
99 | ||
e56f61be L |
100 | /* Nonzero means never create DT_NEEDED entries for dynamic libraries |
101 | in DT_NEEDED tags. */ | |
102 | bfd_boolean add_needed = TRUE; | |
103 | ||
b34976b6 AM |
104 | /* TRUE if we should demangle symbol names. */ |
105 | bfd_boolean demangling; | |
252b5132 RH |
106 | |
107 | args_type command_line; | |
108 | ||
109 | ld_config_type config; | |
110 | ||
bcaa7b3e L |
111 | sort_type sort_section; |
112 | ||
e2243057 RS |
113 | static const char *get_sysroot |
114 | (int, char **); | |
0125cdf2 | 115 | static char *get_emulation |
1579bae1 | 116 | (int, char **); |
0125cdf2 | 117 | static bfd_boolean add_archive_element |
1579bae1 | 118 | (struct bfd_link_info *, bfd *, const char *); |
0125cdf2 | 119 | static bfd_boolean multiple_definition |
1579bae1 AM |
120 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
121 | bfd *, asection *, bfd_vma); | |
0125cdf2 | 122 | static bfd_boolean multiple_common |
1579bae1 AM |
123 | (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, |
124 | bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 125 | static bfd_boolean add_to_set |
1579bae1 AM |
126 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
127 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 128 | static bfd_boolean constructor_callback |
1579bae1 AM |
129 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
130 | asection *, bfd_vma); | |
0125cdf2 | 131 | static bfd_boolean warning_callback |
1579bae1 AM |
132 | (struct bfd_link_info *, const char *, const char *, bfd *, |
133 | asection *, bfd_vma); | |
0125cdf2 | 134 | static void warning_find_reloc |
1579bae1 | 135 | (bfd *, asection *, void *); |
0125cdf2 | 136 | static bfd_boolean undefined_symbol |
1579bae1 AM |
137 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
138 | bfd_boolean); | |
0125cdf2 | 139 | static bfd_boolean reloc_overflow |
dfeffb9f L |
140 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
141 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 142 | static bfd_boolean reloc_dangerous |
1579bae1 | 143 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 144 | static bfd_boolean unattached_reloc |
1579bae1 | 145 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 146 | static bfd_boolean notice |
1579bae1 | 147 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 NC |
148 | |
149 | static struct bfd_link_callbacks link_callbacks = | |
150 | { | |
252b5132 RH |
151 | add_archive_element, |
152 | multiple_definition, | |
153 | multiple_common, | |
154 | add_to_set, | |
155 | constructor_callback, | |
156 | warning_callback, | |
157 | undefined_symbol, | |
158 | reloc_overflow, | |
159 | reloc_dangerous, | |
160 | unattached_reloc, | |
e1fffbe6 | 161 | notice, |
2889e75b | 162 | einfo, |
49fa1e15 AM |
163 | info_msg, |
164 | minfo, | |
2889e75b | 165 | ldlang_override_segment_assignment |
252b5132 RH |
166 | }; |
167 | ||
168 | struct bfd_link_info link_info; | |
169 | \f | |
170 | static void | |
1579bae1 | 171 | remove_output (void) |
252b5132 | 172 | { |
6d5e62f8 | 173 | if (output_filename) |
252b5132 | 174 | { |
f13a99db AM |
175 | if (link_info.output_bfd) |
176 | bfd_cache_close (link_info.output_bfd); | |
252b5132 | 177 | if (delete_output_file_on_failure) |
bb14f524 | 178 | unlink_if_ordinary (output_filename); |
252b5132 RH |
179 | } |
180 | } | |
181 | ||
182 | int | |
1579bae1 | 183 | main (int argc, char **argv) |
252b5132 RH |
184 | { |
185 | char *emulation; | |
186 | long start_time = get_run_time (); | |
187 | ||
188 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
189 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
190 | #endif |
191 | #if defined (HAVE_SETLOCALE) | |
192 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
193 | #endif |
194 | bindtextdomain (PACKAGE, LOCALEDIR); | |
195 | textdomain (PACKAGE); | |
196 | ||
197 | program_name = argv[0]; | |
198 | xmalloc_set_program_name (program_name); | |
199 | ||
200 | START_PROGRESS (program_name, 0); | |
201 | ||
869b9d07 MM |
202 | expandargv (&argc, &argv); |
203 | ||
252b5132 RH |
204 | bfd_init (); |
205 | ||
206 | bfd_set_error_program_name (program_name); | |
207 | ||
208 | xatexit (remove_output); | |
209 | ||
e2243057 RS |
210 | /* Set up the sysroot directory. */ |
211 | ld_sysroot = get_sysroot (argc, argv); | |
212 | if (*ld_sysroot) | |
9c8ebd6a | 213 | { |
e2243057 | 214 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 215 | { |
70487fb2 | 216 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 217 | ld_sysroot = ""; |
0125cdf2 | 218 | } |
e2243057 RS |
219 | else |
220 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 221 | } |
3fe38064 NC |
222 | if (ld_canon_sysroot) |
223 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
224 | else | |
225 | ld_canon_sysroot_len = -1; | |
226 | ||
252b5132 RH |
227 | /* Set the default BFD target based on the configured target. Doing |
228 | this permits the linker to be configured for a particular target, | |
229 | and linked against a shared BFD library which was configured for | |
230 | a different target. The macro TARGET is defined by Makefile. */ | |
231 | if (! bfd_set_default_target (TARGET)) | |
232 | { | |
233 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
234 | xexit (1); | |
235 | } | |
236 | ||
b47c4208 AM |
237 | #if YYDEBUG |
238 | { | |
239 | extern int yydebug; | |
240 | yydebug = 1; | |
241 | } | |
242 | #endif | |
243 | ||
b34976b6 | 244 | config.build_constructors = TRUE; |
c76308d2 | 245 | config.rpath_separator = ':'; |
a854a4a7 AM |
246 | config.split_by_reloc = (unsigned) -1; |
247 | config.split_by_file = (bfd_size_type) -1; | |
3b95049e AM |
248 | config.make_executable = TRUE; |
249 | config.magic_demand_paged = TRUE; | |
250 | config.text_read_only = TRUE; | |
251 | ||
b34976b6 | 252 | command_line.warn_mismatch = TRUE; |
fe7929ce | 253 | command_line.warn_search_mismatch = TRUE; |
b34976b6 | 254 | command_line.check_section_addresses = TRUE; |
bcaa7b3e | 255 | |
252b5132 RH |
256 | /* We initialize DEMANGLING based on the environment variable |
257 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
258 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
259 | environment. Acting the same way here lets us provide the same | |
260 | interface by default. */ | |
261 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
262 | ||
b34976b6 | 263 | link_info.allow_undefined_version = TRUE; |
b5067602 | 264 | link_info.keep_memory = TRUE; |
b5067602 | 265 | link_info.combreloc = TRUE; |
d5cd3933 | 266 | link_info.strip_discarded = TRUE; |
fdc90cb4 | 267 | link_info.emit_hash = TRUE; |
a9a4c53e AM |
268 | link_info.callbacks = &link_callbacks; |
269 | link_info.input_bfds_tail = &link_info.input_bfds; | |
3dbf70a2 MM |
270 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
271 | and _fini symbols. We are compatible. */ | |
272 | link_info.init_function = "_init"; | |
273 | link_info.fini_function = "_fini"; | |
a9a4c53e | 274 | link_info.relax_pass = 1; |
e0076ab3 | 275 | link_info.pei386_auto_import = -1; |
db6751f2 | 276 | link_info.spare_dynamic_tags = 5; |
967928e9 | 277 | link_info.path_separator = ':'; |
24718e3b | 278 | |
252b5132 | 279 | ldfile_add_arch (""); |
252b5132 RH |
280 | emulation = get_emulation (argc, argv); |
281 | ldemul_choose_mode (emulation); | |
742aeb63 | 282 | default_target = ldemul_choose_target (argc, argv); |
252b5132 RH |
283 | lang_init (); |
284 | ldemul_before_parse (); | |
b34976b6 | 285 | lang_has_input_file = FALSE; |
252b5132 RH |
286 | parse_args (argc, argv); |
287 | ||
2d643429 NC |
288 | if (config.hash_table_size != 0) |
289 | bfd_hash_set_default_size (config.hash_table_size); | |
290 | ||
252b5132 RH |
291 | ldemul_set_symbols (); |
292 | ||
1049f94e | 293 | if (link_info.relocatable) |
252b5132 | 294 | { |
ac69cbc6 | 295 | if (command_line.relax) |
252b5132 RH |
296 | einfo (_("%P%F: --relax and -r may not be used together\n")); |
297 | if (link_info.shared) | |
298 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
299 | } | |
300 | ||
d8cf8b51 L |
301 | /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, |
302 | --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and | |
303 | --dynamic-list FILE. -Bsymbolic and -Bsymbolic-functions are | |
304 | for shared libraries. -Bsymbolic overrides all others and vice | |
305 | versa. */ | |
306 | switch (command_line.symbolic) | |
307 | { | |
308 | case symbolic_unset: | |
309 | break; | |
310 | case symbolic: | |
311 | /* -Bsymbolic is for shared library only. */ | |
312 | if (link_info.shared) | |
313 | { | |
314 | link_info.symbolic = TRUE; | |
315 | /* Should we free the unused memory? */ | |
316 | link_info.dynamic_list = NULL; | |
317 | command_line.dynamic_list = dynamic_list_unset; | |
318 | } | |
319 | break; | |
320 | case symbolic_functions: | |
321 | /* -Bsymbolic-functions is for shared library only. */ | |
322 | if (link_info.shared) | |
323 | command_line.dynamic_list = dynamic_list_data; | |
324 | break; | |
325 | } | |
326 | ||
327 | switch (command_line.dynamic_list) | |
328 | { | |
329 | case dynamic_list_unset: | |
330 | break; | |
331 | case dynamic_list_data: | |
332 | link_info.dynamic_data = TRUE; | |
333 | case dynamic_list: | |
334 | link_info.dynamic = TRUE; | |
335 | break; | |
336 | } | |
337 | ||
7333607e JJ |
338 | if (! link_info.shared) |
339 | { | |
340 | if (command_line.filter_shlib) | |
e97cb84f | 341 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 342 | if (command_line.auxiliary_filters) |
e97cb84f | 343 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
344 | } |
345 | ||
36af4a4e JJ |
346 | if (! link_info.shared || link_info.pie) |
347 | link_info.executable = TRUE; | |
348 | ||
252b5132 RH |
349 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
350 | don't see how else this can be handled, since in this case we | |
351 | must preserve all externally visible symbols. */ | |
1049f94e | 352 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
353 | { |
354 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 355 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
356 | link_info.discard = discard_all; |
357 | } | |
358 | ||
14be8564 L |
359 | /* If we have not already opened and parsed a linker script, |
360 | try the default script from command line first. */ | |
361 | if (saved_script_handle == NULL | |
362 | && command_line.default_script != NULL) | |
363 | { | |
364 | ldfile_open_command_file (command_line.default_script); | |
365 | parser_input = input_script; | |
366 | yyparse (); | |
367 | } | |
368 | ||
b9a8de1e NC |
369 | /* If we have not already opened and parsed a linker script |
370 | read the emulation's appropriate default script. */ | |
b90e1c6f | 371 | if (saved_script_handle == NULL) |
252b5132 | 372 | { |
252b5132 | 373 | int isfile; |
b7a26f91 | 374 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
375 | |
376 | if (isfile) | |
377 | ldfile_open_command_file (s); | |
378 | else | |
b7a26f91 | 379 | { |
252b5132 RH |
380 | lex_string = s; |
381 | lex_redirect (s); | |
382 | } | |
383 | parser_input = input_script; | |
384 | yyparse (); | |
385 | lex_string = NULL; | |
386 | } | |
387 | ||
b9a8de1e NC |
388 | if (trace_file_tries) |
389 | { | |
9cb61eab AM |
390 | if (saved_script_handle) |
391 | info_msg (_("using external linker script:")); | |
392 | else | |
393 | info_msg (_("using internal linker script:")); | |
394 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
395 | |
396 | if (saved_script_handle) | |
397 | { | |
74699268 | 398 | static const int ld_bufsz = 8193; |
b9a8de1e | 399 | size_t n; |
74699268 | 400 | char *buf = xmalloc (ld_bufsz); |
b9a8de1e NC |
401 | |
402 | rewind (saved_script_handle); | |
74699268 | 403 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 404 | { |
b7a26f91 | 405 | buf[n] = 0; |
b9a8de1e NC |
406 | info_msg (buf); |
407 | } | |
408 | rewind (saved_script_handle); | |
409 | free (buf); | |
410 | } | |
411 | else | |
412 | { | |
413 | int isfile; | |
414 | ||
b7a26f91 | 415 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 416 | } |
b7a26f91 | 417 | |
b9a8de1e NC |
418 | info_msg ("\n==================================================\n"); |
419 | } | |
420 | ||
252b5132 RH |
421 | lang_final (); |
422 | ||
b34976b6 | 423 | if (!lang_has_input_file) |
252b5132 RH |
424 | { |
425 | if (version_printed) | |
426 | xexit (0); | |
427 | einfo (_("%P%F: no input files\n")); | |
428 | } | |
429 | ||
430 | if (trace_files) | |
0125cdf2 | 431 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
432 | |
433 | ldemul_after_parse (); | |
434 | ||
252b5132 RH |
435 | if (config.map_filename) |
436 | { | |
437 | if (strcmp (config.map_filename, "-") == 0) | |
438 | { | |
439 | config.map_file = stdout; | |
440 | } | |
441 | else | |
442 | { | |
443 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
444 | if (config.map_file == (FILE *) NULL) | |
445 | { | |
446 | bfd_set_error (bfd_error_system_call); | |
447 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
448 | config.map_filename); | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
252b5132 RH |
453 | lang_process (); |
454 | ||
455 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 456 | symbols, and possibly multiple definitions. */ |
1049f94e | 457 | if (link_info.relocatable) |
f13a99db | 458 | link_info.output_bfd->flags &= ~EXEC_P; |
252b5132 | 459 | else |
f13a99db | 460 | link_info.output_bfd->flags |= EXEC_P; |
252b5132 RH |
461 | |
462 | ldwrite (); | |
463 | ||
464 | if (config.map_file != NULL) | |
465 | lang_map (); | |
466 | if (command_line.cref) | |
467 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
468 | if (nocrossref_list != NULL) | |
469 | check_nocrossrefs (); | |
470 | ||
750877ba L |
471 | lang_finish (); |
472 | ||
1049f94e | 473 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 474 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 475 | want to ignore for relocatable output?) */ |
b34976b6 | 476 | if (!config.make_executable && !force_make_executable) |
252b5132 | 477 | { |
b34976b6 | 478 | if (trace_files) |
0125cdf2 NC |
479 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
480 | output_filename); | |
252b5132 RH |
481 | |
482 | /* The file will be removed by remove_output. */ | |
252b5132 RH |
483 | xexit (1); |
484 | } | |
485 | else | |
486 | { | |
f13a99db AM |
487 | if (! bfd_close (link_info.output_bfd)) |
488 | einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); | |
252b5132 RH |
489 | |
490 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
491 | executable file and it doesn't end in .exe, copy it to one |
492 | which does. */ | |
1049f94e | 493 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
494 | { |
495 | int len = strlen (output_filename); | |
0125cdf2 | 496 | |
6d5e62f8 | 497 | if (len < 4 |
252b5132 RH |
498 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
499 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
500 | { | |
501 | FILE *src; | |
502 | FILE *dst; | |
503 | const int bsize = 4096; | |
504 | char *buf = xmalloc (bsize); | |
505 | int l; | |
506 | char *dst_name = xmalloc (len + 5); | |
0125cdf2 | 507 | |
252b5132 RH |
508 | strcpy (dst_name, output_filename); |
509 | strcat (dst_name, ".exe"); | |
510 | src = fopen (output_filename, FOPEN_RB); | |
511 | dst = fopen (dst_name, FOPEN_WB); | |
512 | ||
513 | if (!src) | |
1579bae1 AM |
514 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
515 | output_filename); | |
252b5132 | 516 | if (!dst) |
1579bae1 AM |
517 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
518 | dst_name); | |
252b5132 RH |
519 | while ((l = fread (buf, 1, bsize, src)) > 0) |
520 | { | |
521 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 522 | |
252b5132 | 523 | if (done != l) |
0125cdf2 | 524 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 525 | } |
0125cdf2 | 526 | |
252b5132 RH |
527 | fclose (src); |
528 | if (fclose (dst) == EOF) | |
0125cdf2 | 529 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
530 | free (dst_name); |
531 | free (buf); | |
532 | } | |
533 | } | |
534 | } | |
535 | ||
536 | END_PROGRESS (program_name); | |
537 | ||
538 | if (config.stats) | |
539 | { | |
540 | #ifdef HAVE_SBRK | |
1579bae1 | 541 | char *lim = sbrk (0); |
252b5132 RH |
542 | #endif |
543 | long run_time = get_run_time () - start_time; | |
544 | ||
545 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), | |
546 | program_name, run_time / 1000000, run_time % 1000000); | |
547 | #ifdef HAVE_SBRK | |
548 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
549 | (long) (lim - (char *) &environ)); | |
550 | #endif | |
551 | } | |
552 | ||
553 | /* Prevent remove_output from doing anything, after a successful link. */ | |
554 | output_filename = NULL; | |
555 | ||
556 | xexit (0); | |
557 | return 0; | |
558 | } | |
559 | ||
e2243057 RS |
560 | /* If the configured sysroot is relocatable, try relocating it based on |
561 | default prefix FROM. Return the relocated directory if it exists, | |
562 | otherwise return null. */ | |
563 | ||
564 | static char * | |
565 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
566 | { | |
567 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
568 | char *path; | |
569 | struct stat s; | |
570 | ||
571 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
572 | if (path) | |
573 | { | |
574 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
575 | return path; | |
576 | free (path); | |
577 | } | |
578 | #endif | |
579 | return 0; | |
580 | } | |
581 | ||
582 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
583 | ||
584 | static const char * | |
585 | get_sysroot (int argc, char **argv) | |
586 | { | |
587 | int i; | |
588 | const char *path; | |
589 | ||
590 | for (i = 1; i < argc; i++) | |
0112cd26 | 591 | if (CONST_STRNEQ (argv[i], "--sysroot=")) |
e2243057 RS |
592 | return argv[i] + strlen ("--sysroot="); |
593 | ||
594 | path = get_relative_sysroot (BINDIR); | |
595 | if (path) | |
596 | return path; | |
597 | ||
598 | path = get_relative_sysroot (TOOLBINDIR); | |
599 | if (path) | |
600 | return path; | |
601 | ||
602 | return TARGET_SYSTEM_ROOT; | |
603 | } | |
604 | ||
252b5132 RH |
605 | /* We need to find any explicitly given emulation in order to initialize the |
606 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
607 | ||
608 | static char * | |
1579bae1 | 609 | get_emulation (int argc, char **argv) |
252b5132 RH |
610 | { |
611 | char *emulation; | |
612 | int i; | |
613 | ||
614 | emulation = getenv (EMULATION_ENVIRON); | |
615 | if (emulation == NULL) | |
616 | emulation = DEFAULT_EMULATION; | |
617 | ||
618 | for (i = 1; i < argc; i++) | |
619 | { | |
0112cd26 | 620 | if (CONST_STRNEQ (argv[i], "-m")) |
252b5132 RH |
621 | { |
622 | if (argv[i][2] == '\0') | |
623 | { | |
624 | /* -m EMUL */ | |
625 | if (i < argc - 1) | |
626 | { | |
627 | emulation = argv[i + 1]; | |
628 | i++; | |
629 | } | |
630 | else | |
0125cdf2 | 631 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
632 | } |
633 | else if (strcmp (argv[i], "-mips1") == 0 | |
634 | || strcmp (argv[i], "-mips2") == 0 | |
635 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 636 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
637 | || strcmp (argv[i], "-mips5") == 0 |
638 | || strcmp (argv[i], "-mips32") == 0 | |
639 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
640 | || strcmp (argv[i], "-mips64") == 0 |
641 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 642 | { |
31d677f9 | 643 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
644 | passed to the linker by some MIPS compilers. They |
645 | generally tell the linker to use a slightly different | |
646 | library path. Perhaps someday these should be | |
647 | implemented as emulations; until then, we just ignore | |
648 | the arguments and hope that nobody ever creates | |
649 | emulations named ips1, ips2 or ips3. */ | |
650 | } | |
651 | else if (strcmp (argv[i], "-m486") == 0) | |
652 | { | |
653 | /* FIXME: The argument -m486 is passed to the linker on | |
654 | some Linux systems. Hope that nobody creates an | |
655 | emulation named 486. */ | |
656 | } | |
657 | else | |
658 | { | |
659 | /* -mEMUL */ | |
660 | emulation = &argv[i][2]; | |
661 | } | |
662 | } | |
663 | } | |
664 | ||
665 | return emulation; | |
666 | } | |
667 | ||
252b5132 | 668 | void |
1579bae1 | 669 | add_ysym (const char *name) |
252b5132 | 670 | { |
1579bae1 | 671 | if (link_info.notice_hash == NULL) |
252b5132 | 672 | { |
1579bae1 | 673 | link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
674 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
675 | bfd_hash_newfunc, | |
676 | sizeof (struct bfd_hash_entry), | |
677 | 61)) | |
252b5132 | 678 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 679 | } |
252b5132 | 680 | |
1579bae1 | 681 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
682 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
683 | } | |
684 | ||
685 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
686 | ||
687 | void | |
1579bae1 | 688 | add_wrap (const char *name) |
252b5132 RH |
689 | { |
690 | if (link_info.wrap_hash == NULL) | |
691 | { | |
1579bae1 | 692 | link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
693 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
694 | bfd_hash_newfunc, | |
695 | sizeof (struct bfd_hash_entry), | |
696 | 61)) | |
252b5132 RH |
697 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
698 | } | |
0125cdf2 | 699 | |
b34976b6 | 700 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
701 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
702 | } | |
703 | ||
704 | /* Handle the -retain-symbols-file option. */ | |
705 | ||
706 | void | |
1579bae1 | 707 | add_keepsyms_file (const char *filename) |
252b5132 RH |
708 | { |
709 | FILE *file; | |
710 | char *buf; | |
711 | size_t bufsize; | |
712 | int c; | |
713 | ||
714 | if (link_info.strip == strip_some) | |
715 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
716 | ||
717 | file = fopen (filename, "r"); | |
1579bae1 | 718 | if (file == NULL) |
252b5132 RH |
719 | { |
720 | bfd_set_error (bfd_error_system_call); | |
721 | einfo ("%X%P: %s: %E\n", filename); | |
722 | return; | |
723 | } | |
724 | ||
1579bae1 | 725 | link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
726 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
727 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
728 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
729 | ||
730 | bufsize = 100; | |
1579bae1 | 731 | buf = xmalloc (bufsize); |
252b5132 RH |
732 | |
733 | c = getc (file); | |
734 | while (c != EOF) | |
735 | { | |
3882b010 | 736 | while (ISSPACE (c)) |
252b5132 RH |
737 | c = getc (file); |
738 | ||
739 | if (c != EOF) | |
740 | { | |
741 | size_t len = 0; | |
742 | ||
3882b010 | 743 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
744 | { |
745 | buf[len] = c; | |
746 | ++len; | |
747 | if (len >= bufsize) | |
748 | { | |
749 | bufsize *= 2; | |
750 | buf = xrealloc (buf, bufsize); | |
751 | } | |
752 | c = getc (file); | |
753 | } | |
754 | ||
755 | buf[len] = '\0'; | |
756 | ||
1579bae1 | 757 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
758 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
759 | } | |
760 | } | |
761 | ||
762 | if (link_info.strip != strip_none) | |
763 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
764 | ||
5ed6aba4 | 765 | free (buf); |
252b5132 RH |
766 | link_info.strip = strip_some; |
767 | } | |
768 | \f | |
769 | /* Callbacks from the BFD linker routines. */ | |
770 | ||
771 | /* This is called when BFD has decided to include an archive member in | |
772 | a link. */ | |
773 | ||
b34976b6 | 774 | static bfd_boolean |
e1fffbe6 | 775 | add_archive_element (struct bfd_link_info *info, |
1579bae1 AM |
776 | bfd *abfd, |
777 | const char *name) | |
252b5132 RH |
778 | { |
779 | lang_input_statement_type *input; | |
780 | ||
5c1d2f5f | 781 | input = xcalloc (1, sizeof (lang_input_statement_type)); |
252b5132 RH |
782 | input->filename = abfd->filename; |
783 | input->local_sym_name = abfd->filename; | |
784 | input->the_bfd = abfd; | |
252b5132 RH |
785 | |
786 | ldlang_add_file (input); | |
787 | ||
1579bae1 | 788 | if (config.map_file != NULL) |
252b5132 | 789 | { |
b34976b6 | 790 | static bfd_boolean header_printed; |
252b5132 RH |
791 | struct bfd_link_hash_entry *h; |
792 | bfd *from; | |
793 | int len; | |
794 | ||
e1fffbe6 | 795 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
796 | |
797 | if (h == NULL) | |
798 | from = NULL; | |
799 | else | |
800 | { | |
801 | switch (h->type) | |
802 | { | |
803 | default: | |
804 | from = NULL; | |
805 | break; | |
806 | ||
807 | case bfd_link_hash_defined: | |
808 | case bfd_link_hash_defweak: | |
809 | from = h->u.def.section->owner; | |
810 | break; | |
811 | ||
812 | case bfd_link_hash_undefined: | |
813 | case bfd_link_hash_undefweak: | |
814 | from = h->u.undef.abfd; | |
815 | break; | |
816 | ||
817 | case bfd_link_hash_common: | |
818 | from = h->u.c.p->section->owner; | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
823 | if (! header_printed) | |
824 | { | |
825 | char buf[100]; | |
826 | ||
e3c8793a | 827 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 828 | minfo ("%s", buf); |
b34976b6 | 829 | header_printed = TRUE; |
252b5132 RH |
830 | } |
831 | ||
832 | if (bfd_my_archive (abfd) == NULL) | |
833 | { | |
834 | minfo ("%s", bfd_get_filename (abfd)); | |
835 | len = strlen (bfd_get_filename (abfd)); | |
836 | } | |
837 | else | |
838 | { | |
839 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
840 | bfd_get_filename (abfd)); | |
841 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
842 | + strlen (bfd_get_filename (abfd)) | |
843 | + 2); | |
844 | } | |
845 | ||
846 | if (len >= 29) | |
847 | { | |
848 | print_nl (); | |
849 | len = 0; | |
850 | } | |
851 | while (len < 30) | |
852 | { | |
853 | print_space (); | |
854 | ++len; | |
855 | } | |
856 | ||
857 | if (from != NULL) | |
858 | minfo ("%B ", from); | |
859 | if (h != NULL) | |
860 | minfo ("(%T)\n", h->root.string); | |
861 | else | |
862 | minfo ("(%s)\n", name); | |
863 | } | |
864 | ||
865 | if (trace_files || trace_file_tries) | |
866 | info_msg ("%I\n", input); | |
867 | ||
b34976b6 | 868 | return TRUE; |
252b5132 RH |
869 | } |
870 | ||
871 | /* This is called when BFD has discovered a symbol which is defined | |
872 | multiple times. */ | |
873 | ||
b34976b6 | 874 | static bfd_boolean |
1579bae1 AM |
875 | multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
876 | const char *name, | |
877 | bfd *obfd, | |
878 | asection *osec, | |
879 | bfd_vma oval, | |
880 | bfd *nbfd, | |
881 | asection *nsec, | |
882 | bfd_vma nval) | |
252b5132 RH |
883 | { |
884 | /* If either section has the output_section field set to | |
885 | bfd_abs_section_ptr, it means that the section is being | |
886 | discarded, and this is not really a multiple definition at all. | |
887 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
888 | sections which are being discarded. */ | |
889 | if ((osec->output_section != NULL | |
890 | && ! bfd_is_abs_section (osec) | |
891 | && bfd_is_abs_section (osec->output_section)) | |
892 | || (nsec->output_section != NULL | |
893 | && ! bfd_is_abs_section (nsec) | |
894 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 895 | return TRUE; |
252b5132 RH |
896 | |
897 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
898 | nbfd, nsec, nval, name); | |
1579bae1 | 899 | if (obfd != NULL) |
252b5132 | 900 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 NC |
901 | |
902 | if (command_line.relax) | |
903 | { | |
904 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
905 | command_line.relax = 0; | |
906 | } | |
6d5e62f8 | 907 | |
b34976b6 | 908 | return TRUE; |
252b5132 RH |
909 | } |
910 | ||
911 | /* This is called when there is a definition of a common symbol, or | |
912 | when a common symbol is found for a symbol that is already defined, | |
913 | or when two common symbols are found. We only do something if | |
914 | -warn-common was used. */ | |
915 | ||
b34976b6 | 916 | static bfd_boolean |
1579bae1 AM |
917 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
918 | const char *name, | |
919 | bfd *obfd, | |
920 | enum bfd_link_hash_type otype, | |
921 | bfd_vma osize, | |
922 | bfd *nbfd, | |
923 | enum bfd_link_hash_type ntype, | |
924 | bfd_vma nsize) | |
252b5132 RH |
925 | { |
926 | if (! config.warn_common) | |
b34976b6 | 927 | return TRUE; |
252b5132 RH |
928 | |
929 | if (ntype == bfd_link_hash_defined | |
930 | || ntype == bfd_link_hash_defweak | |
931 | || ntype == bfd_link_hash_indirect) | |
932 | { | |
933 | ASSERT (otype == bfd_link_hash_common); | |
934 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
935 | nbfd, name); | |
936 | if (obfd != NULL) | |
937 | einfo (_("%B: warning: common is here\n"), obfd); | |
938 | } | |
939 | else if (otype == bfd_link_hash_defined | |
940 | || otype == bfd_link_hash_defweak | |
941 | || otype == bfd_link_hash_indirect) | |
942 | { | |
943 | ASSERT (ntype == bfd_link_hash_common); | |
944 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
945 | nbfd, name); | |
946 | if (obfd != NULL) | |
947 | einfo (_("%B: warning: defined here\n"), obfd); | |
948 | } | |
949 | else | |
950 | { | |
951 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
952 | if (osize > nsize) | |
953 | { | |
954 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
955 | nbfd, name); | |
956 | if (obfd != NULL) | |
957 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
958 | } | |
959 | else if (nsize > osize) | |
960 | { | |
961 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
962 | nbfd, name); | |
963 | if (obfd != NULL) | |
964 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
965 | } | |
966 | else | |
967 | { | |
968 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
969 | if (obfd != NULL) | |
970 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
971 | } | |
972 | } | |
973 | ||
b34976b6 | 974 | return TRUE; |
252b5132 RH |
975 | } |
976 | ||
977 | /* This is called when BFD has discovered a set element. H is the | |
978 | entry in the linker hash table for the set. SECTION and VALUE | |
979 | represent a value which should be added to the set. */ | |
980 | ||
b34976b6 | 981 | static bfd_boolean |
1579bae1 AM |
982 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
983 | struct bfd_link_hash_entry *h, | |
984 | bfd_reloc_code_real_type reloc, | |
985 | bfd *abfd, | |
986 | asection *section, | |
987 | bfd_vma value) | |
252b5132 RH |
988 | { |
989 | if (config.warn_constructors) | |
990 | einfo (_("%P: warning: global constructor %s used\n"), | |
991 | h->root.string); | |
992 | ||
993 | if (! config.build_constructors) | |
b34976b6 | 994 | return TRUE; |
252b5132 | 995 | |
1579bae1 | 996 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
997 | |
998 | if (h->type == bfd_link_hash_new) | |
999 | { | |
1000 | h->type = bfd_link_hash_undefined; | |
1001 | h->u.undef.abfd = abfd; | |
1002 | /* We don't call bfd_link_add_undef to add this to the list of | |
1003 | undefined symbols because we are going to define it | |
1004 | ourselves. */ | |
1005 | } | |
1006 | ||
b34976b6 | 1007 | return TRUE; |
252b5132 RH |
1008 | } |
1009 | ||
1010 | /* This is called when BFD has discovered a constructor. This is only | |
1011 | called for some object file formats--those which do not handle | |
1012 | constructors in some more clever fashion. This is similar to | |
1013 | adding an element to a set, but less general. */ | |
1014 | ||
b34976b6 | 1015 | static bfd_boolean |
1579bae1 AM |
1016 | constructor_callback (struct bfd_link_info *info, |
1017 | bfd_boolean constructor, | |
1018 | const char *name, | |
1019 | bfd *abfd, | |
1020 | asection *section, | |
1021 | bfd_vma value) | |
252b5132 RH |
1022 | { |
1023 | char *s; | |
1024 | struct bfd_link_hash_entry *h; | |
1025 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1026 | ||
1027 | if (config.warn_constructors) | |
1028 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1029 | ||
1030 | if (! config.build_constructors) | |
b34976b6 | 1031 | return TRUE; |
252b5132 RH |
1032 | |
1033 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1034 | useful error message. */ | |
f13a99db | 1035 | if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL |
e1fffbe6 | 1036 | && (info->relocatable |
252b5132 RH |
1037 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1038 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1039 | ||
1040 | s = set_name; | |
1041 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1042 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1043 | if (constructor) | |
1044 | strcpy (s, "__CTOR_LIST__"); | |
1045 | else | |
1046 | strcpy (s, "__DTOR_LIST__"); | |
1047 | ||
b34976b6 | 1048 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1049 | if (h == (struct bfd_link_hash_entry *) NULL) |
1050 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1051 | if (h->type == bfd_link_hash_new) | |
1052 | { | |
1053 | h->type = bfd_link_hash_undefined; | |
1054 | h->u.undef.abfd = abfd; | |
1055 | /* We don't call bfd_link_add_undef to add this to the list of | |
1056 | undefined symbols because we are going to define it | |
1057 | ourselves. */ | |
1058 | } | |
1059 | ||
1060 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1061 | return TRUE; |
252b5132 RH |
1062 | } |
1063 | ||
1064 | /* A structure used by warning_callback to pass information through | |
1065 | bfd_map_over_sections. */ | |
1066 | ||
0125cdf2 NC |
1067 | struct warning_callback_info |
1068 | { | |
b34976b6 | 1069 | bfd_boolean found; |
252b5132 RH |
1070 | const char *warning; |
1071 | const char *symbol; | |
1072 | asymbol **asymbols; | |
1073 | }; | |
1074 | ||
1075 | /* This is called when there is a reference to a warning symbol. */ | |
1076 | ||
b34976b6 | 1077 | static bfd_boolean |
1579bae1 AM |
1078 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1079 | const char *warning, | |
1080 | const char *symbol, | |
1081 | bfd *abfd, | |
1082 | asection *section, | |
1083 | bfd_vma address) | |
252b5132 RH |
1084 | { |
1085 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1086 | have a cleaner interface, but what? */ | |
1087 | if (! config.warn_multiple_gp | |
1088 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1089 | return TRUE; |
252b5132 RH |
1090 | |
1091 | if (section != NULL) | |
300475fe | 1092 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1093 | else if (abfd == NULL) |
300475fe | 1094 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1095 | else if (symbol == NULL) |
300475fe | 1096 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1097 | else |
1098 | { | |
252b5132 RH |
1099 | struct warning_callback_info info; |
1100 | ||
1101 | /* Look through the relocs to see if we can find a plausible | |
1102 | address. */ | |
5c1d2f5f AM |
1103 | |
1104 | if (!bfd_generic_link_read_symbols (abfd)) | |
1105 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
252b5132 | 1106 | |
b34976b6 | 1107 | info.found = FALSE; |
252b5132 RH |
1108 | info.warning = warning; |
1109 | info.symbol = symbol; | |
5c1d2f5f | 1110 | info.asymbols = bfd_get_outsymbols (abfd); |
1579bae1 | 1111 | bfd_map_over_sections (abfd, warning_find_reloc, &info); |
252b5132 RH |
1112 | |
1113 | if (! info.found) | |
300475fe | 1114 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1115 | } |
1116 | ||
b34976b6 | 1117 | return TRUE; |
252b5132 RH |
1118 | } |
1119 | ||
1120 | /* This is called by warning_callback for each section. It checks the | |
1121 | relocs of the section to see if it can find a reference to the | |
1122 | symbol which triggered the warning. If it can, it uses the reloc | |
1123 | to give an error message with a file and line number. */ | |
1124 | ||
1125 | static void | |
1579bae1 | 1126 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1127 | { |
1579bae1 | 1128 | struct warning_callback_info *info = iarg; |
252b5132 RH |
1129 | long relsize; |
1130 | arelent **relpp; | |
1131 | long relcount; | |
1132 | arelent **p, **pend; | |
1133 | ||
1134 | if (info->found) | |
1135 | return; | |
1136 | ||
1137 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1138 | if (relsize < 0) | |
1139 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1140 | if (relsize == 0) | |
1141 | return; | |
1142 | ||
1579bae1 | 1143 | relpp = xmalloc (relsize); |
252b5132 RH |
1144 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1145 | if (relcount < 0) | |
1146 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1147 | ||
1148 | p = relpp; | |
1149 | pend = p + relcount; | |
1150 | for (; p < pend && *p != NULL; p++) | |
1151 | { | |
1152 | arelent *q = *p; | |
1153 | ||
1154 | if (q->sym_ptr_ptr != NULL | |
1155 | && *q->sym_ptr_ptr != NULL | |
1156 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1157 | { | |
1158 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1159 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1160 | info->warning); | |
b34976b6 | 1161 | info->found = TRUE; |
252b5132 RH |
1162 | break; |
1163 | } | |
1164 | } | |
1165 | ||
1166 | free (relpp); | |
1167 | } | |
1168 | ||
1169 | /* This is called when an undefined symbol is found. */ | |
1170 | ||
b34976b6 | 1171 | static bfd_boolean |
1579bae1 AM |
1172 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1173 | const char *name, | |
1174 | bfd *abfd, | |
1175 | asection *section, | |
1176 | bfd_vma address, | |
0b28295d | 1177 | bfd_boolean error) |
252b5132 RH |
1178 | { |
1179 | static char *error_name; | |
1180 | static unsigned int error_count; | |
1181 | ||
1182 | #define MAX_ERRORS_IN_A_ROW 5 | |
1183 | ||
1184 | if (config.warn_once) | |
1185 | { | |
1186 | static struct bfd_hash_table *hash; | |
1187 | ||
1188 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1189 | if (hash == NULL) |
1190 | { | |
1579bae1 | 1191 | hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
1192 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1193 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1194 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1195 | } | |
1196 | ||
b34976b6 AM |
1197 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1198 | return TRUE; | |
252b5132 | 1199 | |
b34976b6 | 1200 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1201 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1202 | } | |
1203 | ||
1204 | /* We never print more than a reasonable number of errors in a row | |
1205 | for a single symbol. */ | |
1579bae1 | 1206 | if (error_name != NULL |
252b5132 RH |
1207 | && strcmp (name, error_name) == 0) |
1208 | ++error_count; | |
1209 | else | |
1210 | { | |
1211 | error_count = 0; | |
1579bae1 | 1212 | if (error_name != NULL) |
252b5132 | 1213 | free (error_name); |
d1b2b2dc | 1214 | error_name = xstrdup (name); |
252b5132 RH |
1215 | } |
1216 | ||
1217 | if (section != NULL) | |
1218 | { | |
1219 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1220 | { |
0b28295d ILT |
1221 | if (error) |
1222 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1223 | abfd, section, address, name); | |
1224 | else | |
1225 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1226 | abfd, section, address, name); | |
b6f29aaa | 1227 | } |
252b5132 | 1228 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1229 | { |
1230 | if (error) | |
1231 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1232 | abfd, section, address, name); | |
1233 | else | |
1234 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1235 | abfd, section, address, name); | |
1236 | } | |
1237 | else if (error) | |
1238 | einfo ("%X"); | |
252b5132 RH |
1239 | } |
1240 | else | |
1241 | { | |
1242 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1243 | { |
0b28295d ILT |
1244 | if (error) |
1245 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1246 | abfd, name); | |
1247 | else | |
1248 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1249 | abfd, name); | |
b6f29aaa | 1250 | } |
252b5132 | 1251 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1252 | { |
1253 | if (error) | |
1254 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1255 | abfd, name); | |
1256 | else | |
1257 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1258 | abfd, name); | |
1259 | } | |
1260 | else if (error) | |
1261 | einfo ("%X"); | |
252b5132 RH |
1262 | } |
1263 | ||
b34976b6 | 1264 | return TRUE; |
252b5132 RH |
1265 | } |
1266 | ||
8aae64e6 AO |
1267 | /* Counter to limit the number of relocation overflow error messages |
1268 | to print. Errors are printed as it is decremented. When it's | |
1269 | called and the counter is zero, a final message is printed | |
1270 | indicating more relocations were omitted. When it gets to -1, no | |
1271 | such errors are printed. If it's initially set to a value less | |
1272 | than -1, all such errors will be printed (--verbose does this). */ | |
1273 | ||
1274 | int overflow_cutoff_limit = 10; | |
1275 | ||
252b5132 RH |
1276 | /* This is called when a reloc overflows. */ |
1277 | ||
b34976b6 | 1278 | static bfd_boolean |
1579bae1 | 1279 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1280 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1281 | const char *name, |
1282 | const char *reloc_name, | |
1283 | bfd_vma addend, | |
1284 | bfd *abfd, | |
1285 | asection *section, | |
1286 | bfd_vma address) | |
252b5132 | 1287 | { |
8aae64e6 AO |
1288 | if (overflow_cutoff_limit == -1) |
1289 | return TRUE; | |
1290 | ||
e1fffbe6 | 1291 | einfo ("%X%C:", abfd, section, address); |
8aae64e6 AO |
1292 | |
1293 | if (overflow_cutoff_limit >= 0 | |
1294 | && overflow_cutoff_limit-- == 0) | |
1295 | { | |
1296 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1297 | return TRUE; | |
1298 | } | |
1299 | ||
dfeffb9f L |
1300 | if (entry) |
1301 | { | |
1302 | while (entry->type == bfd_link_hash_indirect | |
1303 | || entry->type == bfd_link_hash_warning) | |
1304 | entry = entry->u.i.link; | |
1305 | switch (entry->type) | |
1306 | { | |
1307 | case bfd_link_hash_undefined: | |
1308 | case bfd_link_hash_undefweak: | |
1309 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1310 | reloc_name, entry->root.string); | |
1311 | break; | |
1312 | case bfd_link_hash_defined: | |
1313 | case bfd_link_hash_defweak: | |
1314 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1315 | reloc_name, entry->root.string, | |
a6e1b90f L |
1316 | entry->u.def.section, |
1317 | entry->u.def.section == bfd_abs_section_ptr | |
f13a99db | 1318 | ? link_info.output_bfd : entry->u.def.section->owner); |
dfeffb9f L |
1319 | break; |
1320 | default: | |
1321 | abort (); | |
1322 | break; | |
1323 | } | |
1324 | } | |
1325 | else | |
1326 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1327 | reloc_name, name); | |
252b5132 RH |
1328 | if (addend != 0) |
1329 | einfo ("+%v", addend); | |
1330 | einfo ("\n"); | |
b34976b6 | 1331 | return TRUE; |
252b5132 RH |
1332 | } |
1333 | ||
1334 | /* This is called when a dangerous relocation is made. */ | |
1335 | ||
b34976b6 | 1336 | static bfd_boolean |
1579bae1 AM |
1337 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1338 | const char *message, | |
1339 | bfd *abfd, | |
1340 | asection *section, | |
1341 | bfd_vma address) | |
252b5132 | 1342 | { |
e1fffbe6 AM |
1343 | einfo (_("%X%C: dangerous relocation: %s\n"), |
1344 | abfd, section, address, message); | |
b34976b6 | 1345 | return TRUE; |
252b5132 RH |
1346 | } |
1347 | ||
1348 | /* This is called when a reloc is being generated attached to a symbol | |
1349 | that is not being output. */ | |
1350 | ||
b34976b6 | 1351 | static bfd_boolean |
1579bae1 AM |
1352 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1353 | const char *name, | |
1354 | bfd *abfd, | |
1355 | asection *section, | |
1356 | bfd_vma address) | |
252b5132 | 1357 | { |
e1fffbe6 AM |
1358 | einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), |
1359 | abfd, section, address, name); | |
b34976b6 | 1360 | return TRUE; |
252b5132 RH |
1361 | } |
1362 | ||
1363 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1364 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1365 | using the -y option. */ | |
1366 | ||
b34976b6 | 1367 | static bfd_boolean |
1579bae1 AM |
1368 | notice (struct bfd_link_info *info, |
1369 | const char *name, | |
1370 | bfd *abfd, | |
1371 | asection *section, | |
1372 | bfd_vma value) | |
252b5132 | 1373 | { |
5061a885 AM |
1374 | if (name == NULL) |
1375 | { | |
1376 | if (command_line.cref || nocrossref_list != NULL) | |
1377 | return handle_asneeded_cref (abfd, value); | |
1378 | return TRUE; | |
1379 | } | |
1380 | ||
252b5132 RH |
1381 | if (! info->notice_all |
1382 | || (info->notice_hash != NULL | |
b34976b6 | 1383 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) |
252b5132 RH |
1384 | { |
1385 | if (bfd_is_und_section (section)) | |
1386 | einfo ("%B: reference to %s\n", abfd, name); | |
1387 | else | |
1388 | einfo ("%B: definition of %s\n", abfd, name); | |
1389 | } | |
1390 | ||
1391 | if (command_line.cref || nocrossref_list != NULL) | |
1392 | add_cref (name, abfd, section, value); | |
1393 | ||
b34976b6 | 1394 | return TRUE; |
252b5132 | 1395 | } |