Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 DJ |
2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
3 | 2002 | |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
7 | This file is part of GLD, the Gnu Linker. | |
8 | ||
9 | GLD is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GLD is distributed in the hope that it will be useful, | |
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. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GLD; see the file COPYING. If not, write to the Free | |
21 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
22 | 02111-1307, USA. */ | |
23 | ||
24 | #include "bfd.h" | |
25 | #include "sysdep.h" | |
26 | #include <stdio.h> | |
3882b010 | 27 | #include "safe-ctype.h" |
252b5132 RH |
28 | #include "libiberty.h" |
29 | #include "progress.h" | |
30 | #include "bfdlink.h" | |
5af11cab | 31 | #include "filenames.h" |
252b5132 RH |
32 | |
33 | #include "ld.h" | |
34 | #include "ldmain.h" | |
35 | #include "ldmisc.h" | |
36 | #include "ldwrite.h" | |
252b5132 RH |
37 | #include "ldexp.h" |
38 | #include "ldlang.h" | |
df2a7313 | 39 | #include <ldgram.h> |
252b5132 RH |
40 | #include "ldlex.h" |
41 | #include "ldfile.h" | |
b71e2778 | 42 | #include "ldemul.h" |
252b5132 RH |
43 | #include "ldctor.h" |
44 | ||
6d5e62f8 | 45 | /* Somewhere above, sys/stat.h got included . . . . */ |
252b5132 RH |
46 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
47 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
48 | #endif | |
49 | ||
50 | #include <string.h> | |
51 | ||
52 | #ifdef HAVE_SBRK | |
53 | #ifdef NEED_DECLARATION_SBRK | |
54 | extern PTR sbrk (); | |
55 | #endif | |
56 | #endif | |
57 | ||
4e5bae56 DJ |
58 | int main PARAMS ((int, char **)); |
59 | ||
252b5132 RH |
60 | static char *get_emulation PARAMS ((int, char **)); |
61 | static void set_scripts_dir PARAMS ((void)); | |
62 | ||
63 | /* EXPORTS */ | |
64 | ||
65 | char *default_target; | |
66 | const char *output_filename = "a.out"; | |
67 | ||
68 | /* Name this program was invoked by. */ | |
69 | char *program_name; | |
70 | ||
6d5e62f8 | 71 | /* The file that we're creating. */ |
252b5132 RH |
72 | bfd *output_bfd = 0; |
73 | ||
74 | /* Set by -G argument, for MIPS ECOFF target. */ | |
75 | int g_switch_value = 8; | |
76 | ||
77 | /* Nonzero means print names of input files as processed. */ | |
78 | boolean trace_files; | |
79 | ||
80 | /* Nonzero means same, but note open failures, too. */ | |
81 | boolean trace_file_tries; | |
82 | ||
83 | /* Nonzero means version number was printed, so exit successfully | |
84 | instead of complaining if no input files are given. */ | |
85 | boolean version_printed; | |
86 | ||
87 | /* Nonzero means link in every member of an archive. */ | |
88 | boolean whole_archive; | |
89 | ||
90 | /* True if we should demangle symbol names. */ | |
91 | boolean demangling; | |
92 | ||
93 | args_type command_line; | |
94 | ||
95 | ld_config_type config; | |
96 | ||
97 | static void remove_output PARAMS ((void)); | |
98 | static boolean check_for_scripts_dir PARAMS ((char *dir)); | |
99 | static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, | |
100 | const char *)); | |
101 | static boolean multiple_definition PARAMS ((struct bfd_link_info *, | |
102 | const char *, | |
103 | bfd *, asection *, bfd_vma, | |
104 | bfd *, asection *, bfd_vma)); | |
105 | static boolean multiple_common PARAMS ((struct bfd_link_info *, | |
106 | const char *, bfd *, | |
107 | enum bfd_link_hash_type, bfd_vma, | |
108 | bfd *, enum bfd_link_hash_type, | |
109 | bfd_vma)); | |
110 | static boolean add_to_set PARAMS ((struct bfd_link_info *, | |
111 | struct bfd_link_hash_entry *, | |
112 | bfd_reloc_code_real_type, | |
113 | bfd *, asection *, bfd_vma)); | |
114 | static boolean constructor_callback PARAMS ((struct bfd_link_info *, | |
115 | boolean constructor, | |
116 | const char *name, | |
117 | bfd *, asection *, bfd_vma)); | |
118 | static boolean warning_callback PARAMS ((struct bfd_link_info *, | |
119 | const char *, const char *, bfd *, | |
120 | asection *, bfd_vma)); | |
121 | static void warning_find_reloc PARAMS ((bfd *, asection *, PTR)); | |
122 | static boolean undefined_symbol PARAMS ((struct bfd_link_info *, | |
123 | const char *, bfd *, | |
b6f29aaa | 124 | asection *, bfd_vma, boolean)); |
252b5132 RH |
125 | static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, |
126 | const char *, bfd_vma, | |
127 | bfd *, asection *, bfd_vma)); | |
128 | static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, | |
129 | bfd *, asection *, bfd_vma)); | |
130 | static boolean unattached_reloc PARAMS ((struct bfd_link_info *, | |
131 | const char *, bfd *, asection *, | |
132 | bfd_vma)); | |
133 | static boolean notice PARAMS ((struct bfd_link_info *, const char *, | |
134 | bfd *, asection *, bfd_vma)); | |
135 | ||
6d5e62f8 | 136 | static struct bfd_link_callbacks link_callbacks = { |
252b5132 RH |
137 | add_archive_element, |
138 | multiple_definition, | |
139 | multiple_common, | |
140 | add_to_set, | |
141 | constructor_callback, | |
142 | warning_callback, | |
143 | undefined_symbol, | |
144 | reloc_overflow, | |
145 | reloc_dangerous, | |
146 | unattached_reloc, | |
147 | notice | |
148 | }; | |
149 | ||
150 | struct bfd_link_info link_info; | |
151 | \f | |
152 | static void | |
153 | remove_output () | |
154 | { | |
6d5e62f8 | 155 | if (output_filename) |
252b5132 RH |
156 | { |
157 | if (output_bfd && output_bfd->iostream) | |
6d5e62f8 | 158 | fclose ((FILE *) (output_bfd->iostream)); |
252b5132 RH |
159 | if (delete_output_file_on_failure) |
160 | unlink (output_filename); | |
161 | } | |
162 | } | |
163 | ||
164 | int | |
165 | main (argc, argv) | |
166 | int argc; | |
167 | char **argv; | |
168 | { | |
169 | char *emulation; | |
170 | long start_time = get_run_time (); | |
171 | ||
172 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
173 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
174 | #endif |
175 | #if defined (HAVE_SETLOCALE) | |
176 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
177 | #endif |
178 | bindtextdomain (PACKAGE, LOCALEDIR); | |
179 | textdomain (PACKAGE); | |
180 | ||
181 | program_name = argv[0]; | |
182 | xmalloc_set_program_name (program_name); | |
183 | ||
184 | START_PROGRESS (program_name, 0); | |
185 | ||
186 | bfd_init (); | |
187 | ||
188 | bfd_set_error_program_name (program_name); | |
189 | ||
190 | xatexit (remove_output); | |
191 | ||
192 | /* Set the default BFD target based on the configured target. Doing | |
193 | this permits the linker to be configured for a particular target, | |
194 | and linked against a shared BFD library which was configured for | |
195 | a different target. The macro TARGET is defined by Makefile. */ | |
196 | if (! bfd_set_default_target (TARGET)) | |
197 | { | |
198 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
199 | xexit (1); | |
200 | } | |
201 | ||
b47c4208 AM |
202 | #if YYDEBUG |
203 | { | |
204 | extern int yydebug; | |
205 | yydebug = 1; | |
206 | } | |
207 | #endif | |
208 | ||
252b5132 RH |
209 | /* Initialize the data about options. */ |
210 | trace_files = trace_file_tries = version_printed = false; | |
211 | whole_archive = false; | |
212 | config.build_constructors = true; | |
213 | config.dynamic_link = false; | |
214 | config.has_shared = false; | |
a854a4a7 AM |
215 | config.split_by_reloc = (unsigned) -1; |
216 | config.split_by_file = (bfd_size_type) -1; | |
252b5132 | 217 | command_line.force_common_definition = false; |
4818e05f | 218 | command_line.inhibit_common_definition = false; |
252b5132 RH |
219 | command_line.interpreter = NULL; |
220 | command_line.rpath = NULL; | |
221 | command_line.warn_mismatch = true; | |
222 | command_line.check_section_addresses = true; | |
223 | ||
224 | /* We initialize DEMANGLING based on the environment variable | |
225 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
226 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
227 | environment. Acting the same way here lets us provide the same | |
228 | interface by default. */ | |
229 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
230 | ||
231 | link_info.callbacks = &link_callbacks; | |
232 | link_info.relocateable = false; | |
a712da20 | 233 | link_info.emitrelocations = false; |
252b5132 RH |
234 | link_info.shared = false; |
235 | link_info.symbolic = false; | |
2a096f04 | 236 | link_info.export_dynamic = false; |
252b5132 RH |
237 | link_info.static_link = false; |
238 | link_info.traditional_format = false; | |
239 | link_info.optimize = false; | |
240 | link_info.no_undefined = false; | |
b79e8c78 | 241 | link_info.allow_shlib_undefined = false; |
aa713662 | 242 | link_info.allow_multiple_definition = false; |
31941635 | 243 | link_info.allow_undefined_version = true; |
252b5132 | 244 | link_info.strip = strip_none; |
f5fa8ca2 | 245 | link_info.discard = discard_sec_merge; |
252b5132 RH |
246 | link_info.keep_memory = true; |
247 | link_info.input_bfds = NULL; | |
248 | link_info.create_object_symbols_section = NULL; | |
e3e942e9 | 249 | link_info.gc_sym_list = NULL; |
252b5132 RH |
250 | link_info.hash = NULL; |
251 | link_info.keep_hash = NULL; | |
252 | link_info.notice_all = false; | |
253 | link_info.notice_hash = NULL; | |
254 | link_info.wrap_hash = NULL; | |
255 | link_info.mpc860c0 = 0; | |
3dbf70a2 MM |
256 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
257 | and _fini symbols. We are compatible. */ | |
258 | link_info.init_function = "_init"; | |
259 | link_info.fini_function = "_fini"; | |
6c1439be | 260 | link_info.new_dtags = false; |
320fec9a | 261 | link_info.eh_frame_hdr = false; |
e0ee487b L |
262 | link_info.flags = (bfd_vma) 0; |
263 | link_info.flags_1 = (bfd_vma) 0; | |
b044cda1 | 264 | link_info.pei386_auto_import = false; |
e0076ab3 | 265 | link_info.pei386_auto_import = -1; |
f4d73366 | 266 | link_info.combreloc = true; |
db6751f2 | 267 | link_info.spare_dynamic_tags = 5; |
f7c33884 | 268 | link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; |
3dbf70a2 | 269 | |
252b5132 RH |
270 | ldfile_add_arch (""); |
271 | ||
272 | config.make_executable = true; | |
273 | force_make_executable = false; | |
274 | config.magic_demand_paged = true; | |
275 | config.text_read_only = true; | |
252b5132 RH |
276 | |
277 | emulation = get_emulation (argc, argv); | |
278 | ldemul_choose_mode (emulation); | |
742aeb63 | 279 | default_target = ldemul_choose_target (argc, argv); |
252b5132 RH |
280 | lang_init (); |
281 | ldemul_before_parse (); | |
282 | lang_has_input_file = false; | |
283 | parse_args (argc, argv); | |
284 | ||
285 | ldemul_set_symbols (); | |
286 | ||
287 | if (link_info.relocateable) | |
288 | { | |
289 | if (command_line.gc_sections) | |
290 | einfo ("%P%F: --gc-sections and -r may not be used together\n"); | |
291 | if (link_info.mpc860c0) | |
292 | einfo (_("%P%F: -r and --mpc860c0 may not be used together\n")); | |
293 | else if (command_line.relax) | |
294 | einfo (_("%P%F: --relax and -r may not be used together\n")); | |
295 | if (link_info.shared) | |
296 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
297 | } | |
298 | ||
7333607e JJ |
299 | if (! link_info.shared) |
300 | { | |
301 | if (command_line.filter_shlib) | |
e97cb84f | 302 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 303 | if (command_line.auxiliary_filters) |
e97cb84f | 304 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
305 | } |
306 | ||
252b5132 RH |
307 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
308 | don't see how else this can be handled, since in this case we | |
309 | must preserve all externally visible symbols. */ | |
310 | if (link_info.relocateable && link_info.strip == strip_all) | |
311 | { | |
312 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 313 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
314 | link_info.discard = discard_all; |
315 | } | |
316 | ||
317 | /* This essentially adds another -L directory so this must be done after | |
318 | the -L's in argv have been processed. */ | |
319 | set_scripts_dir (); | |
320 | ||
b9a8de1e NC |
321 | /* If we have not already opened and parsed a linker script |
322 | read the emulation's appropriate default script. */ | |
b90e1c6f | 323 | if (saved_script_handle == NULL) |
252b5132 | 324 | { |
252b5132 | 325 | int isfile; |
b7a26f91 | 326 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
327 | |
328 | if (isfile) | |
329 | ldfile_open_command_file (s); | |
330 | else | |
b7a26f91 | 331 | { |
252b5132 RH |
332 | lex_string = s; |
333 | lex_redirect (s); | |
334 | } | |
335 | parser_input = input_script; | |
336 | yyparse (); | |
337 | lex_string = NULL; | |
338 | } | |
339 | ||
b9a8de1e NC |
340 | if (trace_file_tries) |
341 | { | |
9cb61eab AM |
342 | if (saved_script_handle) |
343 | info_msg (_("using external linker script:")); | |
344 | else | |
345 | info_msg (_("using internal linker script:")); | |
346 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
347 | |
348 | if (saved_script_handle) | |
349 | { | |
74699268 | 350 | static const int ld_bufsz = 8193; |
b9a8de1e | 351 | size_t n; |
74699268 | 352 | char *buf = xmalloc (ld_bufsz); |
b9a8de1e NC |
353 | |
354 | rewind (saved_script_handle); | |
74699268 | 355 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 356 | { |
b7a26f91 | 357 | buf[n] = 0; |
b9a8de1e NC |
358 | info_msg (buf); |
359 | } | |
360 | rewind (saved_script_handle); | |
361 | free (buf); | |
362 | } | |
363 | else | |
364 | { | |
365 | int isfile; | |
366 | ||
b7a26f91 | 367 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 368 | } |
b7a26f91 | 369 | |
b9a8de1e NC |
370 | info_msg ("\n==================================================\n"); |
371 | } | |
372 | ||
252b5132 RH |
373 | lang_final (); |
374 | ||
375 | if (lang_has_input_file == false) | |
376 | { | |
377 | if (version_printed) | |
378 | xexit (0); | |
379 | einfo (_("%P%F: no input files\n")); | |
380 | } | |
381 | ||
382 | if (trace_files) | |
383 | { | |
384 | info_msg (_("%P: mode %s\n"), emulation); | |
385 | } | |
386 | ||
387 | ldemul_after_parse (); | |
388 | ||
252b5132 RH |
389 | if (config.map_filename) |
390 | { | |
391 | if (strcmp (config.map_filename, "-") == 0) | |
392 | { | |
393 | config.map_file = stdout; | |
394 | } | |
395 | else | |
396 | { | |
397 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
398 | if (config.map_file == (FILE *) NULL) | |
399 | { | |
400 | bfd_set_error (bfd_error_system_call); | |
401 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
402 | config.map_filename); | |
403 | } | |
404 | } | |
405 | } | |
406 | ||
252b5132 RH |
407 | lang_process (); |
408 | ||
409 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 410 | symbols, and possibly multiple definitions. */ |
252b5132 | 411 | |
252b5132 RH |
412 | if (link_info.relocateable) |
413 | output_bfd->flags &= ~EXEC_P; | |
414 | else | |
415 | output_bfd->flags |= EXEC_P; | |
416 | ||
417 | ldwrite (); | |
418 | ||
419 | if (config.map_file != NULL) | |
420 | lang_map (); | |
421 | if (command_line.cref) | |
422 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
423 | if (nocrossref_list != NULL) | |
424 | check_nocrossrefs (); | |
425 | ||
426 | /* Even if we're producing relocateable output, some non-fatal errors should | |
427 | be reported in the exit status. (What non-fatal errors, if any, do we | |
428 | want to ignore for relocateable output?) */ | |
429 | ||
430 | if (config.make_executable == false && force_make_executable == false) | |
431 | { | |
432 | if (trace_files == true) | |
433 | { | |
434 | einfo (_("%P: link errors found, deleting executable `%s'\n"), | |
435 | output_filename); | |
436 | } | |
437 | ||
438 | /* The file will be removed by remove_output. */ | |
439 | ||
440 | xexit (1); | |
441 | } | |
442 | else | |
443 | { | |
444 | if (! bfd_close (output_bfd)) | |
445 | einfo (_("%F%B: final close failed: %E\n"), output_bfd); | |
446 | ||
447 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
448 | executable file and it doesn't end in .exe, copy it to one |
449 | which does. */ | |
252b5132 RH |
450 | if (! link_info.relocateable && command_line.force_exe_suffix) |
451 | { | |
452 | int len = strlen (output_filename); | |
6d5e62f8 | 453 | if (len < 4 |
252b5132 RH |
454 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
455 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
456 | { | |
457 | FILE *src; | |
458 | FILE *dst; | |
459 | const int bsize = 4096; | |
460 | char *buf = xmalloc (bsize); | |
461 | int l; | |
462 | char *dst_name = xmalloc (len + 5); | |
463 | strcpy (dst_name, output_filename); | |
464 | strcat (dst_name, ".exe"); | |
465 | src = fopen (output_filename, FOPEN_RB); | |
466 | dst = fopen (dst_name, FOPEN_WB); | |
467 | ||
468 | if (!src) | |
469 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename); | |
470 | if (!dst) | |
471 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name); | |
472 | while ((l = fread (buf, 1, bsize, src)) > 0) | |
473 | { | |
474 | int done = fwrite (buf, 1, l, dst); | |
475 | if (done != l) | |
476 | { | |
477 | einfo (_("%P: Error writing file `%s'\n"), dst_name); | |
478 | } | |
479 | } | |
480 | fclose (src); | |
481 | if (fclose (dst) == EOF) | |
482 | { | |
483 | einfo (_("%P: Error closing file `%s'\n"), dst_name); | |
484 | } | |
485 | free (dst_name); | |
486 | free (buf); | |
487 | } | |
488 | } | |
489 | } | |
490 | ||
491 | END_PROGRESS (program_name); | |
492 | ||
493 | if (config.stats) | |
494 | { | |
495 | #ifdef HAVE_SBRK | |
496 | char *lim = (char *) sbrk (0); | |
497 | #endif | |
498 | long run_time = get_run_time () - start_time; | |
499 | ||
500 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), | |
501 | program_name, run_time / 1000000, run_time % 1000000); | |
502 | #ifdef HAVE_SBRK | |
503 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
504 | (long) (lim - (char *) &environ)); | |
505 | #endif | |
506 | } | |
507 | ||
508 | /* Prevent remove_output from doing anything, after a successful link. */ | |
509 | output_filename = NULL; | |
510 | ||
511 | xexit (0); | |
512 | return 0; | |
513 | } | |
514 | ||
515 | /* We need to find any explicitly given emulation in order to initialize the | |
516 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
517 | ||
518 | static char * | |
519 | get_emulation (argc, argv) | |
520 | int argc; | |
521 | char **argv; | |
522 | { | |
523 | char *emulation; | |
524 | int i; | |
525 | ||
526 | emulation = getenv (EMULATION_ENVIRON); | |
527 | if (emulation == NULL) | |
528 | emulation = DEFAULT_EMULATION; | |
529 | ||
530 | for (i = 1; i < argc; i++) | |
531 | { | |
532 | if (!strncmp (argv[i], "-m", 2)) | |
533 | { | |
534 | if (argv[i][2] == '\0') | |
535 | { | |
536 | /* -m EMUL */ | |
537 | if (i < argc - 1) | |
538 | { | |
539 | emulation = argv[i + 1]; | |
540 | i++; | |
541 | } | |
542 | else | |
543 | { | |
6d5e62f8 | 544 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
545 | } |
546 | } | |
547 | else if (strcmp (argv[i], "-mips1") == 0 | |
548 | || strcmp (argv[i], "-mips2") == 0 | |
549 | || strcmp (argv[i], "-mips3") == 0 | |
39e5585e EC |
550 | || strcmp (argv[i], "-mips32") == 0 |
551 | || strcmp (argv[i], "-mips64") == 0 | |
d1cf510e NC |
552 | || strcmp (argv[i], "-mips4") == 0 |
553 | || strcmp (argv[i], "-mips5") == 0) | |
252b5132 | 554 | { |
31d677f9 | 555 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
556 | passed to the linker by some MIPS compilers. They |
557 | generally tell the linker to use a slightly different | |
558 | library path. Perhaps someday these should be | |
559 | implemented as emulations; until then, we just ignore | |
560 | the arguments and hope that nobody ever creates | |
561 | emulations named ips1, ips2 or ips3. */ | |
562 | } | |
563 | else if (strcmp (argv[i], "-m486") == 0) | |
564 | { | |
565 | /* FIXME: The argument -m486 is passed to the linker on | |
566 | some Linux systems. Hope that nobody creates an | |
567 | emulation named 486. */ | |
568 | } | |
569 | else | |
570 | { | |
571 | /* -mEMUL */ | |
572 | emulation = &argv[i][2]; | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | return emulation; | |
578 | } | |
579 | ||
580 | /* If directory DIR contains an "ldscripts" subdirectory, | |
581 | add DIR to the library search path and return true, | |
582 | else return false. */ | |
583 | ||
584 | static boolean | |
585 | check_for_scripts_dir (dir) | |
586 | char *dir; | |
587 | { | |
588 | size_t dirlen; | |
589 | char *buf; | |
590 | struct stat s; | |
591 | boolean res; | |
592 | ||
593 | dirlen = strlen (dir); | |
594 | /* sizeof counts the terminating NUL. */ | |
6d5e62f8 | 595 | buf = (char *) xmalloc (dirlen + sizeof ("/ldscripts")); |
252b5132 RH |
596 | sprintf (buf, "%s/ldscripts", dir); |
597 | ||
598 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
599 | free (buf); | |
600 | if (res) | |
601 | ldfile_add_library_path (dir, false); | |
602 | return res; | |
603 | } | |
604 | ||
605 | /* Set the default directory for finding script files. | |
606 | Libraries will be searched for here too, but that's ok. | |
607 | We look for the "ldscripts" directory in: | |
608 | ||
609 | SCRIPTDIR (passed from Makefile) | |
610 | the dir where this program is (for using it from the build tree) | |
611 | the dir where this program is/../lib (for installing the tool suite elsewhere) */ | |
612 | ||
613 | static void | |
614 | set_scripts_dir () | |
615 | { | |
616 | char *end, *dir; | |
617 | size_t dirlen; | |
618 | ||
619 | if (check_for_scripts_dir (SCRIPTDIR)) | |
6d5e62f8 KH |
620 | /* We've been installed normally. */ |
621 | return; | |
252b5132 RH |
622 | |
623 | /* Look for "ldscripts" in the dir where our binary is. */ | |
624 | end = strrchr (program_name, '/'); | |
5af11cab AM |
625 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
626 | { | |
627 | /* We could have \foo\bar, or /foo\bar. */ | |
628 | char *bslash = strrchr (program_name, '\\'); | |
2ab47eed | 629 | if (end == NULL || (bslash != NULL && bslash > end)) |
5af11cab AM |
630 | end = bslash; |
631 | } | |
632 | #endif | |
252b5132 RH |
633 | |
634 | if (end == NULL) | |
635 | { | |
636 | /* Don't look for ldscripts in the current directory. There is | |
637 | too much potential for confusion. */ | |
638 | return; | |
639 | } | |
640 | ||
641 | dirlen = end - program_name; | |
642 | /* Make a copy of program_name in dir. | |
643 | Leave room for later "/../lib". */ | |
644 | dir = (char *) xmalloc (dirlen + 8); | |
645 | strncpy (dir, program_name, dirlen); | |
646 | dir[dirlen] = '\0'; | |
647 | ||
648 | if (check_for_scripts_dir (dir)) | |
6d5e62f8 KH |
649 | /* Don't free dir. */ |
650 | return; | |
252b5132 RH |
651 | |
652 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
653 | strcpy (dir + dirlen, "/../lib"); | |
654 | if (check_for_scripts_dir (dir)) | |
655 | return; | |
656 | ||
6d5e62f8 KH |
657 | /* Well, we tried. */ |
658 | free (dir); | |
252b5132 RH |
659 | } |
660 | ||
661 | void | |
662 | add_ysym (name) | |
663 | const char *name; | |
664 | { | |
665 | if (link_info.notice_hash == (struct bfd_hash_table *) NULL) | |
666 | { | |
667 | link_info.notice_hash = ((struct bfd_hash_table *) | |
668 | xmalloc (sizeof (struct bfd_hash_table))); | |
669 | if (! bfd_hash_table_init_n (link_info.notice_hash, | |
670 | bfd_hash_newfunc, | |
671 | 61)) | |
672 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
6d5e62f8 | 673 | } |
252b5132 RH |
674 | |
675 | if (bfd_hash_lookup (link_info.notice_hash, name, true, true) | |
676 | == (struct bfd_hash_entry *) NULL) | |
677 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
678 | } | |
679 | ||
680 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
681 | ||
682 | void | |
683 | add_wrap (name) | |
684 | const char *name; | |
685 | { | |
686 | if (link_info.wrap_hash == NULL) | |
687 | { | |
688 | link_info.wrap_hash = ((struct bfd_hash_table *) | |
689 | xmalloc (sizeof (struct bfd_hash_table))); | |
690 | if (! bfd_hash_table_init_n (link_info.wrap_hash, | |
691 | bfd_hash_newfunc, | |
692 | 61)) | |
693 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
694 | } | |
695 | if (bfd_hash_lookup (link_info.wrap_hash, name, true, true) == NULL) | |
696 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
697 | } | |
698 | ||
699 | /* Handle the -retain-symbols-file option. */ | |
700 | ||
701 | void | |
702 | add_keepsyms_file (filename) | |
703 | const char *filename; | |
704 | { | |
705 | FILE *file; | |
706 | char *buf; | |
707 | size_t bufsize; | |
708 | int c; | |
709 | ||
710 | if (link_info.strip == strip_some) | |
711 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
712 | ||
713 | file = fopen (filename, "r"); | |
714 | if (file == (FILE *) NULL) | |
715 | { | |
716 | bfd_set_error (bfd_error_system_call); | |
717 | einfo ("%X%P: %s: %E\n", filename); | |
718 | return; | |
719 | } | |
720 | ||
721 | link_info.keep_hash = ((struct bfd_hash_table *) | |
722 | xmalloc (sizeof (struct bfd_hash_table))); | |
723 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) | |
724 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
725 | ||
726 | bufsize = 100; | |
727 | buf = (char *) xmalloc (bufsize); | |
728 | ||
729 | c = getc (file); | |
730 | while (c != EOF) | |
731 | { | |
3882b010 | 732 | while (ISSPACE (c)) |
252b5132 RH |
733 | c = getc (file); |
734 | ||
735 | if (c != EOF) | |
736 | { | |
737 | size_t len = 0; | |
738 | ||
3882b010 | 739 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
740 | { |
741 | buf[len] = c; | |
742 | ++len; | |
743 | if (len >= bufsize) | |
744 | { | |
745 | bufsize *= 2; | |
746 | buf = xrealloc (buf, bufsize); | |
747 | } | |
748 | c = getc (file); | |
749 | } | |
750 | ||
751 | buf[len] = '\0'; | |
752 | ||
753 | if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) | |
754 | == (struct bfd_hash_entry *) NULL) | |
755 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); | |
756 | } | |
757 | } | |
758 | ||
759 | if (link_info.strip != strip_none) | |
760 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
761 | ||
762 | link_info.strip = strip_some; | |
763 | } | |
764 | \f | |
765 | /* Callbacks from the BFD linker routines. */ | |
766 | ||
767 | /* This is called when BFD has decided to include an archive member in | |
768 | a link. */ | |
769 | ||
252b5132 RH |
770 | static boolean |
771 | add_archive_element (info, abfd, name) | |
87f2a346 | 772 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
773 | bfd *abfd; |
774 | const char *name; | |
775 | { | |
776 | lang_input_statement_type *input; | |
777 | ||
778 | input = ((lang_input_statement_type *) | |
779 | xmalloc (sizeof (lang_input_statement_type))); | |
780 | input->filename = abfd->filename; | |
781 | input->local_sym_name = abfd->filename; | |
782 | input->the_bfd = abfd; | |
783 | input->asymbols = NULL; | |
784 | input->next = NULL; | |
785 | input->just_syms_flag = false; | |
786 | input->loaded = false; | |
787 | input->search_dirs_flag = false; | |
788 | ||
789 | /* FIXME: The following fields are not set: header.next, | |
790 | header.type, closed, passive_position, symbol_count, | |
791 | next_real_file, is_archive, target, real. This bit of code is | |
792 | from the old decode_library_subfile function. I don't know | |
793 | whether any of those fields matters. */ | |
794 | ||
795 | ldlang_add_file (input); | |
796 | ||
797 | if (config.map_file != (FILE *) NULL) | |
798 | { | |
799 | static boolean header_printed; | |
800 | struct bfd_link_hash_entry *h; | |
801 | bfd *from; | |
802 | int len; | |
803 | ||
804 | h = bfd_link_hash_lookup (link_info.hash, name, false, false, true); | |
805 | ||
806 | if (h == NULL) | |
807 | from = NULL; | |
808 | else | |
809 | { | |
810 | switch (h->type) | |
811 | { | |
812 | default: | |
813 | from = NULL; | |
814 | break; | |
815 | ||
816 | case bfd_link_hash_defined: | |
817 | case bfd_link_hash_defweak: | |
818 | from = h->u.def.section->owner; | |
819 | break; | |
820 | ||
821 | case bfd_link_hash_undefined: | |
822 | case bfd_link_hash_undefweak: | |
823 | from = h->u.undef.abfd; | |
824 | break; | |
825 | ||
826 | case bfd_link_hash_common: | |
827 | from = h->u.c.p->section->owner; | |
828 | break; | |
829 | } | |
830 | } | |
831 | ||
832 | if (! header_printed) | |
833 | { | |
834 | char buf[100]; | |
835 | ||
e3c8793a | 836 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 RH |
837 | minfo ("%s", buf); |
838 | header_printed = true; | |
839 | } | |
840 | ||
841 | if (bfd_my_archive (abfd) == NULL) | |
842 | { | |
843 | minfo ("%s", bfd_get_filename (abfd)); | |
844 | len = strlen (bfd_get_filename (abfd)); | |
845 | } | |
846 | else | |
847 | { | |
848 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
849 | bfd_get_filename (abfd)); | |
850 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
851 | + strlen (bfd_get_filename (abfd)) | |
852 | + 2); | |
853 | } | |
854 | ||
855 | if (len >= 29) | |
856 | { | |
857 | print_nl (); | |
858 | len = 0; | |
859 | } | |
860 | while (len < 30) | |
861 | { | |
862 | print_space (); | |
863 | ++len; | |
864 | } | |
865 | ||
866 | if (from != NULL) | |
867 | minfo ("%B ", from); | |
868 | if (h != NULL) | |
869 | minfo ("(%T)\n", h->root.string); | |
870 | else | |
871 | minfo ("(%s)\n", name); | |
872 | } | |
873 | ||
874 | if (trace_files || trace_file_tries) | |
875 | info_msg ("%I\n", input); | |
876 | ||
877 | return true; | |
878 | } | |
879 | ||
880 | /* This is called when BFD has discovered a symbol which is defined | |
881 | multiple times. */ | |
882 | ||
252b5132 RH |
883 | static boolean |
884 | multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) | |
87f2a346 | 885 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
886 | const char *name; |
887 | bfd *obfd; | |
888 | asection *osec; | |
889 | bfd_vma oval; | |
890 | bfd *nbfd; | |
891 | asection *nsec; | |
892 | bfd_vma nval; | |
893 | { | |
894 | /* If either section has the output_section field set to | |
895 | bfd_abs_section_ptr, it means that the section is being | |
896 | discarded, and this is not really a multiple definition at all. | |
897 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
898 | sections which are being discarded. */ | |
899 | if ((osec->output_section != NULL | |
900 | && ! bfd_is_abs_section (osec) | |
901 | && bfd_is_abs_section (osec->output_section)) | |
902 | || (nsec->output_section != NULL | |
903 | && ! bfd_is_abs_section (nsec) | |
904 | && bfd_is_abs_section (nsec->output_section))) | |
905 | return true; | |
906 | ||
907 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
908 | nbfd, nsec, nval, name); | |
909 | if (obfd != (bfd *) NULL) | |
910 | einfo (_("%D: first defined here\n"), obfd, osec, oval); | |
9b14b192 NC |
911 | |
912 | if (command_line.relax) | |
913 | { | |
914 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
915 | command_line.relax = 0; | |
916 | } | |
6d5e62f8 | 917 | |
252b5132 RH |
918 | return true; |
919 | } | |
920 | ||
921 | /* This is called when there is a definition of a common symbol, or | |
922 | when a common symbol is found for a symbol that is already defined, | |
923 | or when two common symbols are found. We only do something if | |
924 | -warn-common was used. */ | |
925 | ||
252b5132 RH |
926 | static boolean |
927 | multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) | |
87f2a346 | 928 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
929 | const char *name; |
930 | bfd *obfd; | |
931 | enum bfd_link_hash_type otype; | |
932 | bfd_vma osize; | |
933 | bfd *nbfd; | |
934 | enum bfd_link_hash_type ntype; | |
935 | bfd_vma nsize; | |
936 | { | |
937 | if (! config.warn_common) | |
938 | return true; | |
939 | ||
940 | if (ntype == bfd_link_hash_defined | |
941 | || ntype == bfd_link_hash_defweak | |
942 | || ntype == bfd_link_hash_indirect) | |
943 | { | |
944 | ASSERT (otype == bfd_link_hash_common); | |
945 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
946 | nbfd, name); | |
947 | if (obfd != NULL) | |
948 | einfo (_("%B: warning: common is here\n"), obfd); | |
949 | } | |
950 | else if (otype == bfd_link_hash_defined | |
951 | || otype == bfd_link_hash_defweak | |
952 | || otype == bfd_link_hash_indirect) | |
953 | { | |
954 | ASSERT (ntype == bfd_link_hash_common); | |
955 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
956 | nbfd, name); | |
957 | if (obfd != NULL) | |
958 | einfo (_("%B: warning: defined here\n"), obfd); | |
959 | } | |
960 | else | |
961 | { | |
962 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
963 | if (osize > nsize) | |
964 | { | |
965 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
966 | nbfd, name); | |
967 | if (obfd != NULL) | |
968 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
969 | } | |
970 | else if (nsize > osize) | |
971 | { | |
972 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
973 | nbfd, name); | |
974 | if (obfd != NULL) | |
975 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
976 | } | |
977 | else | |
978 | { | |
979 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
980 | if (obfd != NULL) | |
981 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
982 | } | |
983 | } | |
984 | ||
985 | return true; | |
986 | } | |
987 | ||
988 | /* This is called when BFD has discovered a set element. H is the | |
989 | entry in the linker hash table for the set. SECTION and VALUE | |
990 | represent a value which should be added to the set. */ | |
991 | ||
252b5132 RH |
992 | static boolean |
993 | add_to_set (info, h, reloc, abfd, section, value) | |
87f2a346 | 994 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
995 | struct bfd_link_hash_entry *h; |
996 | bfd_reloc_code_real_type reloc; | |
997 | bfd *abfd; | |
998 | asection *section; | |
999 | bfd_vma value; | |
1000 | { | |
1001 | if (config.warn_constructors) | |
1002 | einfo (_("%P: warning: global constructor %s used\n"), | |
1003 | h->root.string); | |
1004 | ||
1005 | if (! config.build_constructors) | |
1006 | return true; | |
1007 | ||
1008 | ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value); | |
1009 | ||
1010 | if (h->type == bfd_link_hash_new) | |
1011 | { | |
1012 | h->type = bfd_link_hash_undefined; | |
1013 | h->u.undef.abfd = abfd; | |
1014 | /* We don't call bfd_link_add_undef to add this to the list of | |
1015 | undefined symbols because we are going to define it | |
1016 | ourselves. */ | |
1017 | } | |
1018 | ||
1019 | return true; | |
1020 | } | |
1021 | ||
1022 | /* This is called when BFD has discovered a constructor. This is only | |
1023 | called for some object file formats--those which do not handle | |
1024 | constructors in some more clever fashion. This is similar to | |
1025 | adding an element to a set, but less general. */ | |
1026 | ||
1027 | static boolean | |
1028 | constructor_callback (info, constructor, name, abfd, section, value) | |
1029 | struct bfd_link_info *info; | |
1030 | boolean constructor; | |
1031 | const char *name; | |
1032 | bfd *abfd; | |
1033 | asection *section; | |
1034 | bfd_vma value; | |
1035 | { | |
1036 | char *s; | |
1037 | struct bfd_link_hash_entry *h; | |
1038 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1039 | ||
1040 | if (config.warn_constructors) | |
1041 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1042 | ||
1043 | if (! config.build_constructors) | |
1044 | return true; | |
1045 | ||
1046 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1047 | useful error message. */ | |
1048 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL | |
1049 | && (link_info.relocateable | |
1050 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) | |
1051 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1052 | ||
1053 | s = set_name; | |
1054 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1055 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1056 | if (constructor) | |
1057 | strcpy (s, "__CTOR_LIST__"); | |
1058 | else | |
1059 | strcpy (s, "__DTOR_LIST__"); | |
1060 | ||
1061 | h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); | |
1062 | if (h == (struct bfd_link_hash_entry *) NULL) | |
1063 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1064 | if (h->type == bfd_link_hash_new) | |
1065 | { | |
1066 | h->type = bfd_link_hash_undefined; | |
1067 | h->u.undef.abfd = abfd; | |
1068 | /* We don't call bfd_link_add_undef to add this to the list of | |
1069 | undefined symbols because we are going to define it | |
1070 | ourselves. */ | |
1071 | } | |
1072 | ||
1073 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
1074 | return true; | |
1075 | } | |
1076 | ||
1077 | /* A structure used by warning_callback to pass information through | |
1078 | bfd_map_over_sections. */ | |
1079 | ||
89cdebba | 1080 | struct warning_callback_info { |
252b5132 RH |
1081 | boolean found; |
1082 | const char *warning; | |
1083 | const char *symbol; | |
1084 | asymbol **asymbols; | |
1085 | }; | |
1086 | ||
1087 | /* This is called when there is a reference to a warning symbol. */ | |
1088 | ||
252b5132 RH |
1089 | static boolean |
1090 | warning_callback (info, warning, symbol, abfd, section, address) | |
87f2a346 | 1091 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1092 | const char *warning; |
1093 | const char *symbol; | |
1094 | bfd *abfd; | |
1095 | asection *section; | |
1096 | bfd_vma address; | |
1097 | { | |
1098 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1099 | have a cleaner interface, but what? */ | |
1100 | if (! config.warn_multiple_gp | |
1101 | && strcmp (warning, "using multiple gp values") == 0) | |
1102 | return true; | |
1103 | ||
1104 | if (section != NULL) | |
1105 | einfo ("%C: %s\n", abfd, section, address, warning); | |
1106 | else if (abfd == NULL) | |
1107 | einfo ("%P: %s\n", warning); | |
1108 | else if (symbol == NULL) | |
1109 | einfo ("%B: %s\n", abfd, warning); | |
1110 | else | |
1111 | { | |
1112 | lang_input_statement_type *entry; | |
1113 | asymbol **asymbols; | |
1114 | struct warning_callback_info info; | |
1115 | ||
1116 | /* Look through the relocs to see if we can find a plausible | |
1117 | address. */ | |
1118 | ||
1119 | entry = (lang_input_statement_type *) abfd->usrdata; | |
1120 | if (entry != NULL && entry->asymbols != NULL) | |
1121 | asymbols = entry->asymbols; | |
1122 | else | |
1123 | { | |
1124 | long symsize; | |
1125 | long symbol_count; | |
1126 | ||
1127 | symsize = bfd_get_symtab_upper_bound (abfd); | |
1128 | if (symsize < 0) | |
1129 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1130 | asymbols = (asymbol **) xmalloc (symsize); | |
1131 | symbol_count = bfd_canonicalize_symtab (abfd, asymbols); | |
1132 | if (symbol_count < 0) | |
1133 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1134 | if (entry != NULL) | |
1135 | { | |
1136 | entry->asymbols = asymbols; | |
1137 | entry->symbol_count = symbol_count; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | info.found = false; | |
1142 | info.warning = warning; | |
1143 | info.symbol = symbol; | |
1144 | info.asymbols = asymbols; | |
1145 | bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info); | |
1146 | ||
1147 | if (! info.found) | |
1148 | einfo ("%B: %s\n", abfd, warning); | |
1149 | ||
1150 | if (entry == NULL) | |
1151 | free (asymbols); | |
1152 | } | |
1153 | ||
1154 | return true; | |
1155 | } | |
1156 | ||
1157 | /* This is called by warning_callback for each section. It checks the | |
1158 | relocs of the section to see if it can find a reference to the | |
1159 | symbol which triggered the warning. If it can, it uses the reloc | |
1160 | to give an error message with a file and line number. */ | |
1161 | ||
1162 | static void | |
1163 | warning_find_reloc (abfd, sec, iarg) | |
1164 | bfd *abfd; | |
1165 | asection *sec; | |
1166 | PTR iarg; | |
1167 | { | |
1168 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; | |
1169 | long relsize; | |
1170 | arelent **relpp; | |
1171 | long relcount; | |
1172 | arelent **p, **pend; | |
1173 | ||
1174 | if (info->found) | |
1175 | return; | |
1176 | ||
1177 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1178 | if (relsize < 0) | |
1179 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1180 | if (relsize == 0) | |
1181 | return; | |
1182 | ||
1183 | relpp = (arelent **) xmalloc (relsize); | |
1184 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); | |
1185 | if (relcount < 0) | |
1186 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1187 | ||
1188 | p = relpp; | |
1189 | pend = p + relcount; | |
1190 | for (; p < pend && *p != NULL; p++) | |
1191 | { | |
1192 | arelent *q = *p; | |
1193 | ||
1194 | if (q->sym_ptr_ptr != NULL | |
1195 | && *q->sym_ptr_ptr != NULL | |
1196 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1197 | { | |
1198 | /* We found a reloc for the symbol we are looking for. */ | |
1199 | einfo ("%C: %s\n", abfd, sec, q->address, info->warning); | |
1200 | info->found = true; | |
1201 | break; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | free (relpp); | |
1206 | } | |
1207 | ||
1208 | /* This is called when an undefined symbol is found. */ | |
1209 | ||
252b5132 | 1210 | static boolean |
b6f29aaa | 1211 | undefined_symbol (info, name, abfd, section, address, fatal) |
87f2a346 | 1212 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1213 | const char *name; |
1214 | bfd *abfd; | |
1215 | asection *section; | |
1216 | bfd_vma address; | |
a712da20 | 1217 | boolean fatal ATTRIBUTE_UNUSED; |
252b5132 RH |
1218 | { |
1219 | static char *error_name; | |
1220 | static unsigned int error_count; | |
1221 | ||
1222 | #define MAX_ERRORS_IN_A_ROW 5 | |
1223 | ||
1224 | if (config.warn_once) | |
1225 | { | |
1226 | static struct bfd_hash_table *hash; | |
1227 | ||
1228 | /* Only warn once about a particular undefined symbol. */ | |
1229 | ||
1230 | if (hash == NULL) | |
1231 | { | |
1232 | hash = ((struct bfd_hash_table *) | |
1233 | xmalloc (sizeof (struct bfd_hash_table))); | |
1234 | if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) | |
1235 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); | |
1236 | } | |
1237 | ||
1238 | if (bfd_hash_lookup (hash, name, false, false) != NULL) | |
1239 | return true; | |
1240 | ||
1241 | if (bfd_hash_lookup (hash, name, true, true) == NULL) | |
1242 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); | |
1243 | } | |
1244 | ||
1245 | /* We never print more than a reasonable number of errors in a row | |
1246 | for a single symbol. */ | |
1247 | if (error_name != (char *) NULL | |
1248 | && strcmp (name, error_name) == 0) | |
1249 | ++error_count; | |
1250 | else | |
1251 | { | |
1252 | error_count = 0; | |
1253 | if (error_name != (char *) NULL) | |
1254 | free (error_name); | |
d1b2b2dc | 1255 | error_name = xstrdup (name); |
252b5132 RH |
1256 | } |
1257 | ||
1258 | if (section != NULL) | |
1259 | { | |
1260 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa L |
1261 | { |
1262 | einfo (_("%C: undefined reference to `%T'\n"), | |
1263 | abfd, section, address, name); | |
1264 | if (fatal) | |
1265 | einfo ("%X"); | |
1266 | } | |
252b5132 RH |
1267 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
1268 | einfo (_("%D: more undefined references to `%T' follow\n"), | |
1269 | abfd, section, address, name); | |
1270 | } | |
1271 | else | |
1272 | { | |
1273 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa L |
1274 | { |
1275 | einfo (_("%B: undefined reference to `%T'\n"), | |
1276 | abfd, name); | |
1277 | if (fatal) | |
1278 | einfo ("%X"); | |
1279 | } | |
252b5132 RH |
1280 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
1281 | einfo (_("%B: more undefined references to `%T' follow\n"), | |
1282 | abfd, name); | |
1283 | } | |
1284 | ||
1285 | return true; | |
1286 | } | |
1287 | ||
1288 | /* This is called when a reloc overflows. */ | |
1289 | ||
252b5132 RH |
1290 | static boolean |
1291 | reloc_overflow (info, name, reloc_name, addend, abfd, section, address) | |
87f2a346 | 1292 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1293 | const char *name; |
1294 | const char *reloc_name; | |
1295 | bfd_vma addend; | |
1296 | bfd *abfd; | |
1297 | asection *section; | |
1298 | bfd_vma address; | |
1299 | { | |
1300 | if (abfd == (bfd *) NULL) | |
1301 | einfo (_("%P%X: generated")); | |
1302 | else | |
1303 | einfo ("%X%C:", abfd, section, address); | |
1304 | einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name); | |
1305 | if (addend != 0) | |
1306 | einfo ("+%v", addend); | |
1307 | einfo ("\n"); | |
1308 | return true; | |
1309 | } | |
1310 | ||
1311 | /* This is called when a dangerous relocation is made. */ | |
1312 | ||
252b5132 RH |
1313 | static boolean |
1314 | reloc_dangerous (info, message, abfd, section, address) | |
87f2a346 | 1315 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1316 | const char *message; |
1317 | bfd *abfd; | |
1318 | asection *section; | |
1319 | bfd_vma address; | |
1320 | { | |
1321 | if (abfd == (bfd *) NULL) | |
1322 | einfo (_("%P%X: generated")); | |
1323 | else | |
1324 | einfo ("%X%C:", abfd, section, address); | |
1325 | einfo (_("dangerous relocation: %s\n"), message); | |
1326 | return true; | |
1327 | } | |
1328 | ||
1329 | /* This is called when a reloc is being generated attached to a symbol | |
1330 | that is not being output. */ | |
1331 | ||
252b5132 RH |
1332 | static boolean |
1333 | unattached_reloc (info, name, abfd, section, address) | |
87f2a346 | 1334 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1335 | const char *name; |
1336 | bfd *abfd; | |
1337 | asection *section; | |
1338 | bfd_vma address; | |
1339 | { | |
1340 | if (abfd == (bfd *) NULL) | |
1341 | einfo (_("%P%X: generated")); | |
1342 | else | |
1343 | einfo ("%X%C:", abfd, section, address); | |
1344 | einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name); | |
1345 | return true; | |
1346 | } | |
1347 | ||
1348 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1349 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1350 | using the -y option. */ | |
1351 | ||
1352 | static boolean | |
1353 | notice (info, name, abfd, section, value) | |
1354 | struct bfd_link_info *info; | |
1355 | const char *name; | |
1356 | bfd *abfd; | |
1357 | asection *section; | |
1358 | bfd_vma value; | |
1359 | { | |
1360 | if (! info->notice_all | |
1361 | || (info->notice_hash != NULL | |
1362 | && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL)) | |
1363 | { | |
1364 | if (bfd_is_und_section (section)) | |
1365 | einfo ("%B: reference to %s\n", abfd, name); | |
1366 | else | |
1367 | einfo ("%B: definition of %s\n", abfd, name); | |
1368 | } | |
1369 | ||
1370 | if (command_line.cref || nocrossref_list != NULL) | |
1371 | add_cref (name, abfd, section, value); | |
1372 | ||
1373 | return true; | |
1374 | } |