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Commit | Line | Data |
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252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
cdc0d45e | 3 | 2002, 2003 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
2fa9fc65 | 7 | This file is part of GLD, the Gnu Linker. |
252b5132 | 8 | |
2fa9fc65 NC |
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. | |
252b5132 | 13 | |
2fa9fc65 NC |
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. | |
252b5132 | 18 | |
2fa9fc65 NC |
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. */ | |
252b5132 RH |
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. */ | |
b34976b6 | 78 | bfd_boolean trace_files; |
252b5132 RH |
79 | |
80 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 81 | bfd_boolean trace_file_tries; |
252b5132 RH |
82 | |
83 | /* Nonzero means version number was printed, so exit successfully | |
84 | instead of complaining if no input files are given. */ | |
b34976b6 | 85 | bfd_boolean version_printed; |
252b5132 RH |
86 | |
87 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 88 | bfd_boolean whole_archive; |
252b5132 | 89 | |
b34976b6 AM |
90 | /* TRUE if we should demangle symbol names. */ |
91 | bfd_boolean demangling; | |
252b5132 RH |
92 | |
93 | args_type command_line; | |
94 | ||
95 | ld_config_type config; | |
96 | ||
97 | static void remove_output PARAMS ((void)); | |
b34976b6 AM |
98 | static bfd_boolean check_for_scripts_dir PARAMS ((char *dir)); |
99 | static bfd_boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, | |
252b5132 | 100 | const char *)); |
b34976b6 | 101 | static bfd_boolean multiple_definition PARAMS ((struct bfd_link_info *, |
252b5132 RH |
102 | const char *, |
103 | bfd *, asection *, bfd_vma, | |
104 | bfd *, asection *, bfd_vma)); | |
b34976b6 | 105 | static bfd_boolean multiple_common PARAMS ((struct bfd_link_info *, |
252b5132 RH |
106 | const char *, bfd *, |
107 | enum bfd_link_hash_type, bfd_vma, | |
108 | bfd *, enum bfd_link_hash_type, | |
109 | bfd_vma)); | |
b34976b6 | 110 | static bfd_boolean add_to_set PARAMS ((struct bfd_link_info *, |
252b5132 RH |
111 | struct bfd_link_hash_entry *, |
112 | bfd_reloc_code_real_type, | |
113 | bfd *, asection *, bfd_vma)); | |
b34976b6 AM |
114 | static bfd_boolean constructor_callback PARAMS ((struct bfd_link_info *, |
115 | bfd_boolean constructor, | |
252b5132 RH |
116 | const char *name, |
117 | bfd *, asection *, bfd_vma)); | |
b34976b6 | 118 | static bfd_boolean warning_callback PARAMS ((struct bfd_link_info *, |
252b5132 RH |
119 | const char *, const char *, bfd *, |
120 | asection *, bfd_vma)); | |
121 | static void warning_find_reloc PARAMS ((bfd *, asection *, PTR)); | |
b34976b6 | 122 | static bfd_boolean undefined_symbol PARAMS ((struct bfd_link_info *, |
252b5132 | 123 | const char *, bfd *, |
b34976b6 AM |
124 | asection *, bfd_vma, bfd_boolean)); |
125 | static bfd_boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, | |
252b5132 RH |
126 | const char *, bfd_vma, |
127 | bfd *, asection *, bfd_vma)); | |
b34976b6 | 128 | static bfd_boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, |
252b5132 | 129 | bfd *, asection *, bfd_vma)); |
b34976b6 | 130 | static bfd_boolean unattached_reloc PARAMS ((struct bfd_link_info *, |
252b5132 RH |
131 | const char *, bfd *, asection *, |
132 | bfd_vma)); | |
b34976b6 | 133 | static bfd_boolean notice PARAMS ((struct bfd_link_info *, const char *, |
252b5132 RH |
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 | 209 | /* Initialize the data about options. */ |
b34976b6 AM |
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; | |
b34976b6 AM |
217 | command_line.force_common_definition = FALSE; |
218 | command_line.inhibit_common_definition = FALSE; | |
252b5132 RH |
219 | command_line.interpreter = NULL; |
220 | command_line.rpath = NULL; | |
b34976b6 AM |
221 | command_line.warn_mismatch = TRUE; |
222 | command_line.check_section_addresses = TRUE; | |
312b768e | 223 | command_line.accept_unknown_input_arch = FALSE; |
252b5132 RH |
224 | |
225 | /* We initialize DEMANGLING based on the environment variable | |
226 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
227 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
228 | environment. Acting the same way here lets us provide the same | |
229 | interface by default. */ | |
230 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
231 | ||
b34976b6 AM |
232 | link_info.relocateable = FALSE; |
233 | link_info.emitrelocations = FALSE; | |
b5067602 | 234 | link_info.task_link = FALSE; |
b34976b6 AM |
235 | link_info.shared = FALSE; |
236 | link_info.symbolic = FALSE; | |
237 | link_info.export_dynamic = FALSE; | |
238 | link_info.static_link = FALSE; | |
239 | link_info.traditional_format = FALSE; | |
240 | link_info.optimize = FALSE; | |
241 | link_info.no_undefined = FALSE; | |
242 | link_info.allow_shlib_undefined = FALSE; | |
243 | link_info.allow_multiple_definition = FALSE; | |
244 | link_info.allow_undefined_version = TRUE; | |
b5067602 AM |
245 | link_info.keep_memory = TRUE; |
246 | link_info.notice_all = FALSE; | |
247 | link_info.nocopyreloc = FALSE; | |
248 | link_info.new_dtags = FALSE; | |
249 | link_info.combreloc = TRUE; | |
250 | link_info.eh_frame_hdr = FALSE; | |
d5cd3933 | 251 | link_info.strip_discarded = TRUE; |
252b5132 | 252 | link_info.strip = strip_none; |
f5fa8ca2 | 253 | link_info.discard = discard_sec_merge; |
b5067602 AM |
254 | link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; |
255 | link_info.callbacks = &link_callbacks; | |
252b5132 RH |
256 | link_info.hash = NULL; |
257 | link_info.keep_hash = NULL; | |
252b5132 RH |
258 | link_info.notice_hash = NULL; |
259 | link_info.wrap_hash = NULL; | |
b5067602 AM |
260 | link_info.input_bfds = NULL; |
261 | link_info.create_object_symbols_section = NULL; | |
262 | link_info.gc_sym_list = NULL; | |
263 | link_info.base_file = NULL; | |
3dbf70a2 MM |
264 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
265 | and _fini symbols. We are compatible. */ | |
266 | link_info.init_function = "_init"; | |
267 | link_info.fini_function = "_fini"; | |
b5067602 | 268 | link_info.mpc860c0 = 0; |
e0076ab3 | 269 | link_info.pei386_auto_import = -1; |
b34976b6 | 270 | link_info.pei386_runtime_pseudo_reloc = FALSE; |
db6751f2 | 271 | link_info.spare_dynamic_tags = 5; |
b5067602 AM |
272 | link_info.flags = (bfd_vma) 0; |
273 | link_info.flags_1 = (bfd_vma) 0; | |
3dbf70a2 | 274 | |
252b5132 RH |
275 | ldfile_add_arch (""); |
276 | ||
b34976b6 AM |
277 | config.make_executable = TRUE; |
278 | force_make_executable = FALSE; | |
279 | config.magic_demand_paged = TRUE; | |
280 | config.text_read_only = TRUE; | |
252b5132 RH |
281 | |
282 | emulation = get_emulation (argc, argv); | |
283 | ldemul_choose_mode (emulation); | |
742aeb63 | 284 | default_target = ldemul_choose_target (argc, argv); |
252b5132 RH |
285 | lang_init (); |
286 | ldemul_before_parse (); | |
b34976b6 | 287 | lang_has_input_file = FALSE; |
252b5132 RH |
288 | parse_args (argc, argv); |
289 | ||
290 | ldemul_set_symbols (); | |
291 | ||
292 | if (link_info.relocateable) | |
293 | { | |
294 | if (command_line.gc_sections) | |
295 | einfo ("%P%F: --gc-sections and -r may not be used together\n"); | |
296 | if (link_info.mpc860c0) | |
297 | einfo (_("%P%F: -r and --mpc860c0 may not be used together\n")); | |
298 | else if (command_line.relax) | |
299 | einfo (_("%P%F: --relax and -r may not be used together\n")); | |
300 | if (link_info.shared) | |
301 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
302 | } | |
303 | ||
7333607e JJ |
304 | if (! link_info.shared) |
305 | { | |
306 | if (command_line.filter_shlib) | |
e97cb84f | 307 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 308 | if (command_line.auxiliary_filters) |
e97cb84f | 309 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
310 | } |
311 | ||
252b5132 RH |
312 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
313 | don't see how else this can be handled, since in this case we | |
314 | must preserve all externally visible symbols. */ | |
315 | if (link_info.relocateable && link_info.strip == strip_all) | |
316 | { | |
317 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 318 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
319 | link_info.discard = discard_all; |
320 | } | |
321 | ||
322 | /* This essentially adds another -L directory so this must be done after | |
323 | the -L's in argv have been processed. */ | |
324 | set_scripts_dir (); | |
325 | ||
b9a8de1e NC |
326 | /* If we have not already opened and parsed a linker script |
327 | read the emulation's appropriate default script. */ | |
b90e1c6f | 328 | if (saved_script_handle == NULL) |
252b5132 | 329 | { |
252b5132 | 330 | int isfile; |
b7a26f91 | 331 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
332 | |
333 | if (isfile) | |
334 | ldfile_open_command_file (s); | |
335 | else | |
b7a26f91 | 336 | { |
252b5132 RH |
337 | lex_string = s; |
338 | lex_redirect (s); | |
339 | } | |
340 | parser_input = input_script; | |
341 | yyparse (); | |
342 | lex_string = NULL; | |
343 | } | |
344 | ||
b9a8de1e NC |
345 | if (trace_file_tries) |
346 | { | |
9cb61eab AM |
347 | if (saved_script_handle) |
348 | info_msg (_("using external linker script:")); | |
349 | else | |
350 | info_msg (_("using internal linker script:")); | |
351 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
352 | |
353 | if (saved_script_handle) | |
354 | { | |
74699268 | 355 | static const int ld_bufsz = 8193; |
b9a8de1e | 356 | size_t n; |
74699268 | 357 | char *buf = xmalloc (ld_bufsz); |
b9a8de1e NC |
358 | |
359 | rewind (saved_script_handle); | |
74699268 | 360 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 361 | { |
b7a26f91 | 362 | buf[n] = 0; |
b9a8de1e NC |
363 | info_msg (buf); |
364 | } | |
365 | rewind (saved_script_handle); | |
366 | free (buf); | |
367 | } | |
368 | else | |
369 | { | |
370 | int isfile; | |
371 | ||
b7a26f91 | 372 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 373 | } |
b7a26f91 | 374 | |
b9a8de1e NC |
375 | info_msg ("\n==================================================\n"); |
376 | } | |
377 | ||
252b5132 RH |
378 | lang_final (); |
379 | ||
b34976b6 | 380 | if (!lang_has_input_file) |
252b5132 RH |
381 | { |
382 | if (version_printed) | |
383 | xexit (0); | |
384 | einfo (_("%P%F: no input files\n")); | |
385 | } | |
386 | ||
387 | if (trace_files) | |
388 | { | |
389 | info_msg (_("%P: mode %s\n"), emulation); | |
390 | } | |
391 | ||
392 | ldemul_after_parse (); | |
393 | ||
252b5132 RH |
394 | if (config.map_filename) |
395 | { | |
396 | if (strcmp (config.map_filename, "-") == 0) | |
397 | { | |
398 | config.map_file = stdout; | |
399 | } | |
400 | else | |
401 | { | |
402 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
403 | if (config.map_file == (FILE *) NULL) | |
404 | { | |
405 | bfd_set_error (bfd_error_system_call); | |
406 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
407 | config.map_filename); | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
252b5132 RH |
412 | lang_process (); |
413 | ||
414 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 415 | symbols, and possibly multiple definitions. */ |
252b5132 | 416 | |
252b5132 RH |
417 | if (link_info.relocateable) |
418 | output_bfd->flags &= ~EXEC_P; | |
419 | else | |
420 | output_bfd->flags |= EXEC_P; | |
421 | ||
422 | ldwrite (); | |
423 | ||
424 | if (config.map_file != NULL) | |
425 | lang_map (); | |
426 | if (command_line.cref) | |
427 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
428 | if (nocrossref_list != NULL) | |
429 | check_nocrossrefs (); | |
430 | ||
431 | /* Even if we're producing relocateable output, some non-fatal errors should | |
432 | be reported in the exit status. (What non-fatal errors, if any, do we | |
433 | want to ignore for relocateable output?) */ | |
434 | ||
b34976b6 | 435 | if (!config.make_executable && !force_make_executable) |
252b5132 | 436 | { |
b34976b6 | 437 | if (trace_files) |
252b5132 RH |
438 | { |
439 | einfo (_("%P: link errors found, deleting executable `%s'\n"), | |
440 | output_filename); | |
441 | } | |
442 | ||
443 | /* The file will be removed by remove_output. */ | |
444 | ||
445 | xexit (1); | |
446 | } | |
447 | else | |
448 | { | |
449 | if (! bfd_close (output_bfd)) | |
450 | einfo (_("%F%B: final close failed: %E\n"), output_bfd); | |
451 | ||
452 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
453 | executable file and it doesn't end in .exe, copy it to one |
454 | which does. */ | |
252b5132 RH |
455 | if (! link_info.relocateable && command_line.force_exe_suffix) |
456 | { | |
457 | int len = strlen (output_filename); | |
6d5e62f8 | 458 | if (len < 4 |
252b5132 RH |
459 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
460 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
461 | { | |
462 | FILE *src; | |
463 | FILE *dst; | |
464 | const int bsize = 4096; | |
465 | char *buf = xmalloc (bsize); | |
466 | int l; | |
467 | char *dst_name = xmalloc (len + 5); | |
468 | strcpy (dst_name, output_filename); | |
469 | strcat (dst_name, ".exe"); | |
470 | src = fopen (output_filename, FOPEN_RB); | |
471 | dst = fopen (dst_name, FOPEN_WB); | |
472 | ||
473 | if (!src) | |
474 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename); | |
475 | if (!dst) | |
476 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name); | |
477 | while ((l = fread (buf, 1, bsize, src)) > 0) | |
478 | { | |
479 | int done = fwrite (buf, 1, l, dst); | |
480 | if (done != l) | |
481 | { | |
482 | einfo (_("%P: Error writing file `%s'\n"), dst_name); | |
483 | } | |
484 | } | |
485 | fclose (src); | |
486 | if (fclose (dst) == EOF) | |
487 | { | |
488 | einfo (_("%P: Error closing file `%s'\n"), dst_name); | |
489 | } | |
490 | free (dst_name); | |
491 | free (buf); | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
496 | END_PROGRESS (program_name); | |
497 | ||
498 | if (config.stats) | |
499 | { | |
500 | #ifdef HAVE_SBRK | |
501 | char *lim = (char *) sbrk (0); | |
502 | #endif | |
503 | long run_time = get_run_time () - start_time; | |
504 | ||
505 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), | |
506 | program_name, run_time / 1000000, run_time % 1000000); | |
507 | #ifdef HAVE_SBRK | |
508 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
509 | (long) (lim - (char *) &environ)); | |
510 | #endif | |
511 | } | |
512 | ||
513 | /* Prevent remove_output from doing anything, after a successful link. */ | |
514 | output_filename = NULL; | |
515 | ||
516 | xexit (0); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | /* We need to find any explicitly given emulation in order to initialize the | |
521 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
522 | ||
523 | static char * | |
524 | get_emulation (argc, argv) | |
525 | int argc; | |
526 | char **argv; | |
527 | { | |
528 | char *emulation; | |
529 | int i; | |
530 | ||
531 | emulation = getenv (EMULATION_ENVIRON); | |
532 | if (emulation == NULL) | |
533 | emulation = DEFAULT_EMULATION; | |
534 | ||
535 | for (i = 1; i < argc; i++) | |
536 | { | |
537 | if (!strncmp (argv[i], "-m", 2)) | |
538 | { | |
539 | if (argv[i][2] == '\0') | |
540 | { | |
541 | /* -m EMUL */ | |
542 | if (i < argc - 1) | |
543 | { | |
544 | emulation = argv[i + 1]; | |
545 | i++; | |
546 | } | |
547 | else | |
548 | { | |
6d5e62f8 | 549 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
550 | } |
551 | } | |
552 | else if (strcmp (argv[i], "-mips1") == 0 | |
553 | || strcmp (argv[i], "-mips2") == 0 | |
554 | || strcmp (argv[i], "-mips3") == 0 | |
39e5585e EC |
555 | || strcmp (argv[i], "-mips32") == 0 |
556 | || strcmp (argv[i], "-mips64") == 0 | |
d1cf510e NC |
557 | || strcmp (argv[i], "-mips4") == 0 |
558 | || strcmp (argv[i], "-mips5") == 0) | |
252b5132 | 559 | { |
31d677f9 | 560 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
561 | passed to the linker by some MIPS compilers. They |
562 | generally tell the linker to use a slightly different | |
563 | library path. Perhaps someday these should be | |
564 | implemented as emulations; until then, we just ignore | |
565 | the arguments and hope that nobody ever creates | |
566 | emulations named ips1, ips2 or ips3. */ | |
567 | } | |
568 | else if (strcmp (argv[i], "-m486") == 0) | |
569 | { | |
570 | /* FIXME: The argument -m486 is passed to the linker on | |
571 | some Linux systems. Hope that nobody creates an | |
572 | emulation named 486. */ | |
573 | } | |
574 | else | |
575 | { | |
576 | /* -mEMUL */ | |
577 | emulation = &argv[i][2]; | |
578 | } | |
579 | } | |
580 | } | |
581 | ||
582 | return emulation; | |
583 | } | |
584 | ||
585 | /* If directory DIR contains an "ldscripts" subdirectory, | |
b34976b6 AM |
586 | add DIR to the library search path and return TRUE, |
587 | else return FALSE. */ | |
252b5132 | 588 | |
b34976b6 | 589 | static bfd_boolean |
252b5132 RH |
590 | check_for_scripts_dir (dir) |
591 | char *dir; | |
592 | { | |
593 | size_t dirlen; | |
594 | char *buf; | |
595 | struct stat s; | |
b34976b6 | 596 | bfd_boolean res; |
252b5132 RH |
597 | |
598 | dirlen = strlen (dir); | |
599 | /* sizeof counts the terminating NUL. */ | |
6d5e62f8 | 600 | buf = (char *) xmalloc (dirlen + sizeof ("/ldscripts")); |
252b5132 RH |
601 | sprintf (buf, "%s/ldscripts", dir); |
602 | ||
603 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
604 | free (buf); | |
605 | if (res) | |
b34976b6 | 606 | ldfile_add_library_path (dir, FALSE); |
252b5132 RH |
607 | return res; |
608 | } | |
609 | ||
610 | /* Set the default directory for finding script files. | |
611 | Libraries will be searched for here too, but that's ok. | |
612 | We look for the "ldscripts" directory in: | |
613 | ||
cdc0d45e DJ |
614 | SCRIPTDIR (passed from Makefile) |
615 | (adjusted according to the current location of the binary) | |
252b5132 RH |
616 | SCRIPTDIR (passed from Makefile) |
617 | the dir where this program is (for using it from the build tree) | |
cdc0d45e DJ |
618 | the dir where this program is/../lib |
619 | (for installing the tool suite elsewhere) */ | |
252b5132 RH |
620 | |
621 | static void | |
622 | set_scripts_dir () | |
623 | { | |
624 | char *end, *dir; | |
625 | size_t dirlen; | |
626 | ||
cdc0d45e DJ |
627 | dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR); |
628 | if (dir && check_for_scripts_dir (dir)) | |
629 | /* Success. Don't free dir. */ | |
630 | return; | |
631 | ||
632 | if (dir) | |
633 | free (dir); | |
634 | ||
252b5132 | 635 | if (check_for_scripts_dir (SCRIPTDIR)) |
6d5e62f8 KH |
636 | /* We've been installed normally. */ |
637 | return; | |
252b5132 RH |
638 | |
639 | /* Look for "ldscripts" in the dir where our binary is. */ | |
640 | end = strrchr (program_name, '/'); | |
5af11cab AM |
641 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
642 | { | |
643 | /* We could have \foo\bar, or /foo\bar. */ | |
644 | char *bslash = strrchr (program_name, '\\'); | |
2ab47eed | 645 | if (end == NULL || (bslash != NULL && bslash > end)) |
5af11cab AM |
646 | end = bslash; |
647 | } | |
648 | #endif | |
252b5132 RH |
649 | |
650 | if (end == NULL) | |
651 | { | |
652 | /* Don't look for ldscripts in the current directory. There is | |
653 | too much potential for confusion. */ | |
654 | return; | |
655 | } | |
656 | ||
657 | dirlen = end - program_name; | |
658 | /* Make a copy of program_name in dir. | |
659 | Leave room for later "/../lib". */ | |
660 | dir = (char *) xmalloc (dirlen + 8); | |
661 | strncpy (dir, program_name, dirlen); | |
662 | dir[dirlen] = '\0'; | |
663 | ||
664 | if (check_for_scripts_dir (dir)) | |
6d5e62f8 KH |
665 | /* Don't free dir. */ |
666 | return; | |
252b5132 RH |
667 | |
668 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
669 | strcpy (dir + dirlen, "/../lib"); | |
670 | if (check_for_scripts_dir (dir)) | |
671 | return; | |
672 | ||
6d5e62f8 KH |
673 | /* Well, we tried. */ |
674 | free (dir); | |
252b5132 RH |
675 | } |
676 | ||
677 | void | |
678 | add_ysym (name) | |
679 | const char *name; | |
680 | { | |
681 | if (link_info.notice_hash == (struct bfd_hash_table *) NULL) | |
682 | { | |
683 | link_info.notice_hash = ((struct bfd_hash_table *) | |
684 | xmalloc (sizeof (struct bfd_hash_table))); | |
685 | if (! bfd_hash_table_init_n (link_info.notice_hash, | |
686 | bfd_hash_newfunc, | |
687 | 61)) | |
688 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
6d5e62f8 | 689 | } |
252b5132 | 690 | |
b34976b6 | 691 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) |
252b5132 RH |
692 | == (struct bfd_hash_entry *) NULL) |
693 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); | |
694 | } | |
695 | ||
696 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
697 | ||
698 | void | |
699 | add_wrap (name) | |
700 | const char *name; | |
701 | { | |
702 | if (link_info.wrap_hash == NULL) | |
703 | { | |
704 | link_info.wrap_hash = ((struct bfd_hash_table *) | |
705 | xmalloc (sizeof (struct bfd_hash_table))); | |
706 | if (! bfd_hash_table_init_n (link_info.wrap_hash, | |
707 | bfd_hash_newfunc, | |
708 | 61)) | |
709 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
710 | } | |
b34976b6 | 711 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
712 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
713 | } | |
714 | ||
715 | /* Handle the -retain-symbols-file option. */ | |
716 | ||
717 | void | |
718 | add_keepsyms_file (filename) | |
719 | const char *filename; | |
720 | { | |
721 | FILE *file; | |
722 | char *buf; | |
723 | size_t bufsize; | |
724 | int c; | |
725 | ||
726 | if (link_info.strip == strip_some) | |
727 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
728 | ||
729 | file = fopen (filename, "r"); | |
730 | if (file == (FILE *) NULL) | |
731 | { | |
732 | bfd_set_error (bfd_error_system_call); | |
733 | einfo ("%X%P: %s: %E\n", filename); | |
734 | return; | |
735 | } | |
736 | ||
737 | link_info.keep_hash = ((struct bfd_hash_table *) | |
738 | xmalloc (sizeof (struct bfd_hash_table))); | |
739 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) | |
740 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
741 | ||
742 | bufsize = 100; | |
743 | buf = (char *) xmalloc (bufsize); | |
744 | ||
745 | c = getc (file); | |
746 | while (c != EOF) | |
747 | { | |
3882b010 | 748 | while (ISSPACE (c)) |
252b5132 RH |
749 | c = getc (file); |
750 | ||
751 | if (c != EOF) | |
752 | { | |
753 | size_t len = 0; | |
754 | ||
3882b010 | 755 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
756 | { |
757 | buf[len] = c; | |
758 | ++len; | |
759 | if (len >= bufsize) | |
760 | { | |
761 | bufsize *= 2; | |
762 | buf = xrealloc (buf, bufsize); | |
763 | } | |
764 | c = getc (file); | |
765 | } | |
766 | ||
767 | buf[len] = '\0'; | |
768 | ||
b34976b6 | 769 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) |
252b5132 RH |
770 | == (struct bfd_hash_entry *) NULL) |
771 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); | |
772 | } | |
773 | } | |
774 | ||
775 | if (link_info.strip != strip_none) | |
776 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
777 | ||
778 | link_info.strip = strip_some; | |
779 | } | |
780 | \f | |
781 | /* Callbacks from the BFD linker routines. */ | |
782 | ||
783 | /* This is called when BFD has decided to include an archive member in | |
784 | a link. */ | |
785 | ||
b34976b6 | 786 | static bfd_boolean |
252b5132 | 787 | add_archive_element (info, abfd, name) |
87f2a346 | 788 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
789 | bfd *abfd; |
790 | const char *name; | |
791 | { | |
792 | lang_input_statement_type *input; | |
793 | ||
794 | input = ((lang_input_statement_type *) | |
795 | xmalloc (sizeof (lang_input_statement_type))); | |
796 | input->filename = abfd->filename; | |
797 | input->local_sym_name = abfd->filename; | |
798 | input->the_bfd = abfd; | |
799 | input->asymbols = NULL; | |
800 | input->next = NULL; | |
b34976b6 AM |
801 | input->just_syms_flag = FALSE; |
802 | input->loaded = FALSE; | |
803 | input->search_dirs_flag = FALSE; | |
252b5132 RH |
804 | |
805 | /* FIXME: The following fields are not set: header.next, | |
806 | header.type, closed, passive_position, symbol_count, | |
807 | next_real_file, is_archive, target, real. This bit of code is | |
808 | from the old decode_library_subfile function. I don't know | |
809 | whether any of those fields matters. */ | |
810 | ||
811 | ldlang_add_file (input); | |
812 | ||
813 | if (config.map_file != (FILE *) NULL) | |
814 | { | |
b34976b6 | 815 | static bfd_boolean header_printed; |
252b5132 RH |
816 | struct bfd_link_hash_entry *h; |
817 | bfd *from; | |
818 | int len; | |
819 | ||
b34976b6 | 820 | h = bfd_link_hash_lookup (link_info.hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
821 | |
822 | if (h == NULL) | |
823 | from = NULL; | |
824 | else | |
825 | { | |
826 | switch (h->type) | |
827 | { | |
828 | default: | |
829 | from = NULL; | |
830 | break; | |
831 | ||
832 | case bfd_link_hash_defined: | |
833 | case bfd_link_hash_defweak: | |
834 | from = h->u.def.section->owner; | |
835 | break; | |
836 | ||
837 | case bfd_link_hash_undefined: | |
838 | case bfd_link_hash_undefweak: | |
839 | from = h->u.undef.abfd; | |
840 | break; | |
841 | ||
842 | case bfd_link_hash_common: | |
843 | from = h->u.c.p->section->owner; | |
844 | break; | |
845 | } | |
846 | } | |
847 | ||
848 | if (! header_printed) | |
849 | { | |
850 | char buf[100]; | |
851 | ||
e3c8793a | 852 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 853 | minfo ("%s", buf); |
b34976b6 | 854 | header_printed = TRUE; |
252b5132 RH |
855 | } |
856 | ||
857 | if (bfd_my_archive (abfd) == NULL) | |
858 | { | |
859 | minfo ("%s", bfd_get_filename (abfd)); | |
860 | len = strlen (bfd_get_filename (abfd)); | |
861 | } | |
862 | else | |
863 | { | |
864 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
865 | bfd_get_filename (abfd)); | |
866 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
867 | + strlen (bfd_get_filename (abfd)) | |
868 | + 2); | |
869 | } | |
870 | ||
871 | if (len >= 29) | |
872 | { | |
873 | print_nl (); | |
874 | len = 0; | |
875 | } | |
876 | while (len < 30) | |
877 | { | |
878 | print_space (); | |
879 | ++len; | |
880 | } | |
881 | ||
882 | if (from != NULL) | |
883 | minfo ("%B ", from); | |
884 | if (h != NULL) | |
885 | minfo ("(%T)\n", h->root.string); | |
886 | else | |
887 | minfo ("(%s)\n", name); | |
888 | } | |
889 | ||
890 | if (trace_files || trace_file_tries) | |
891 | info_msg ("%I\n", input); | |
892 | ||
b34976b6 | 893 | return TRUE; |
252b5132 RH |
894 | } |
895 | ||
896 | /* This is called when BFD has discovered a symbol which is defined | |
897 | multiple times. */ | |
898 | ||
b34976b6 | 899 | static bfd_boolean |
252b5132 | 900 | multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) |
87f2a346 | 901 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
902 | const char *name; |
903 | bfd *obfd; | |
904 | asection *osec; | |
905 | bfd_vma oval; | |
906 | bfd *nbfd; | |
907 | asection *nsec; | |
908 | bfd_vma nval; | |
909 | { | |
910 | /* If either section has the output_section field set to | |
911 | bfd_abs_section_ptr, it means that the section is being | |
912 | discarded, and this is not really a multiple definition at all. | |
913 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
914 | sections which are being discarded. */ | |
915 | if ((osec->output_section != NULL | |
916 | && ! bfd_is_abs_section (osec) | |
917 | && bfd_is_abs_section (osec->output_section)) | |
918 | || (nsec->output_section != NULL | |
919 | && ! bfd_is_abs_section (nsec) | |
920 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 921 | return TRUE; |
252b5132 RH |
922 | |
923 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
924 | nbfd, nsec, nval, name); | |
925 | if (obfd != (bfd *) NULL) | |
926 | einfo (_("%D: first defined here\n"), obfd, osec, oval); | |
9b14b192 NC |
927 | |
928 | if (command_line.relax) | |
929 | { | |
930 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
931 | command_line.relax = 0; | |
932 | } | |
6d5e62f8 | 933 | |
b34976b6 | 934 | return TRUE; |
252b5132 RH |
935 | } |
936 | ||
937 | /* This is called when there is a definition of a common symbol, or | |
938 | when a common symbol is found for a symbol that is already defined, | |
939 | or when two common symbols are found. We only do something if | |
940 | -warn-common was used. */ | |
941 | ||
b34976b6 | 942 | static bfd_boolean |
252b5132 | 943 | multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) |
87f2a346 | 944 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
945 | const char *name; |
946 | bfd *obfd; | |
947 | enum bfd_link_hash_type otype; | |
948 | bfd_vma osize; | |
949 | bfd *nbfd; | |
950 | enum bfd_link_hash_type ntype; | |
951 | bfd_vma nsize; | |
952 | { | |
953 | if (! config.warn_common) | |
b34976b6 | 954 | return TRUE; |
252b5132 RH |
955 | |
956 | if (ntype == bfd_link_hash_defined | |
957 | || ntype == bfd_link_hash_defweak | |
958 | || ntype == bfd_link_hash_indirect) | |
959 | { | |
960 | ASSERT (otype == bfd_link_hash_common); | |
961 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
962 | nbfd, name); | |
963 | if (obfd != NULL) | |
964 | einfo (_("%B: warning: common is here\n"), obfd); | |
965 | } | |
966 | else if (otype == bfd_link_hash_defined | |
967 | || otype == bfd_link_hash_defweak | |
968 | || otype == bfd_link_hash_indirect) | |
969 | { | |
970 | ASSERT (ntype == bfd_link_hash_common); | |
971 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
972 | nbfd, name); | |
973 | if (obfd != NULL) | |
974 | einfo (_("%B: warning: defined here\n"), obfd); | |
975 | } | |
976 | else | |
977 | { | |
978 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
979 | if (osize > nsize) | |
980 | { | |
981 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
982 | nbfd, name); | |
983 | if (obfd != NULL) | |
984 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
985 | } | |
986 | else if (nsize > osize) | |
987 | { | |
988 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
989 | nbfd, name); | |
990 | if (obfd != NULL) | |
991 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
992 | } | |
993 | else | |
994 | { | |
995 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
996 | if (obfd != NULL) | |
997 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
998 | } | |
999 | } | |
1000 | ||
b34976b6 | 1001 | return TRUE; |
252b5132 RH |
1002 | } |
1003 | ||
1004 | /* This is called when BFD has discovered a set element. H is the | |
1005 | entry in the linker hash table for the set. SECTION and VALUE | |
1006 | represent a value which should be added to the set. */ | |
1007 | ||
b34976b6 | 1008 | static bfd_boolean |
252b5132 | 1009 | add_to_set (info, h, reloc, abfd, section, value) |
87f2a346 | 1010 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1011 | struct bfd_link_hash_entry *h; |
1012 | bfd_reloc_code_real_type reloc; | |
1013 | bfd *abfd; | |
1014 | asection *section; | |
1015 | bfd_vma value; | |
1016 | { | |
1017 | if (config.warn_constructors) | |
1018 | einfo (_("%P: warning: global constructor %s used\n"), | |
1019 | h->root.string); | |
1020 | ||
1021 | if (! config.build_constructors) | |
b34976b6 | 1022 | return TRUE; |
252b5132 RH |
1023 | |
1024 | ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value); | |
1025 | ||
1026 | if (h->type == bfd_link_hash_new) | |
1027 | { | |
1028 | h->type = bfd_link_hash_undefined; | |
1029 | h->u.undef.abfd = abfd; | |
1030 | /* We don't call bfd_link_add_undef to add this to the list of | |
1031 | undefined symbols because we are going to define it | |
1032 | ourselves. */ | |
1033 | } | |
1034 | ||
b34976b6 | 1035 | return TRUE; |
252b5132 RH |
1036 | } |
1037 | ||
1038 | /* This is called when BFD has discovered a constructor. This is only | |
1039 | called for some object file formats--those which do not handle | |
1040 | constructors in some more clever fashion. This is similar to | |
1041 | adding an element to a set, but less general. */ | |
1042 | ||
b34976b6 | 1043 | static bfd_boolean |
252b5132 RH |
1044 | constructor_callback (info, constructor, name, abfd, section, value) |
1045 | struct bfd_link_info *info; | |
b34976b6 | 1046 | bfd_boolean constructor; |
252b5132 RH |
1047 | const char *name; |
1048 | bfd *abfd; | |
1049 | asection *section; | |
1050 | bfd_vma value; | |
1051 | { | |
1052 | char *s; | |
1053 | struct bfd_link_hash_entry *h; | |
1054 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1055 | ||
1056 | if (config.warn_constructors) | |
1057 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1058 | ||
1059 | if (! config.build_constructors) | |
b34976b6 | 1060 | return TRUE; |
252b5132 RH |
1061 | |
1062 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1063 | useful error message. */ | |
1064 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL | |
1065 | && (link_info.relocateable | |
1066 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) | |
1067 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1068 | ||
1069 | s = set_name; | |
1070 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1071 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1072 | if (constructor) | |
1073 | strcpy (s, "__CTOR_LIST__"); | |
1074 | else | |
1075 | strcpy (s, "__DTOR_LIST__"); | |
1076 | ||
b34976b6 | 1077 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1078 | if (h == (struct bfd_link_hash_entry *) NULL) |
1079 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1080 | if (h->type == bfd_link_hash_new) | |
1081 | { | |
1082 | h->type = bfd_link_hash_undefined; | |
1083 | h->u.undef.abfd = abfd; | |
1084 | /* We don't call bfd_link_add_undef to add this to the list of | |
1085 | undefined symbols because we are going to define it | |
1086 | ourselves. */ | |
1087 | } | |
1088 | ||
1089 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1090 | return TRUE; |
252b5132 RH |
1091 | } |
1092 | ||
1093 | /* A structure used by warning_callback to pass information through | |
1094 | bfd_map_over_sections. */ | |
1095 | ||
89cdebba | 1096 | struct warning_callback_info { |
b34976b6 | 1097 | bfd_boolean found; |
252b5132 RH |
1098 | const char *warning; |
1099 | const char *symbol; | |
1100 | asymbol **asymbols; | |
1101 | }; | |
1102 | ||
1103 | /* This is called when there is a reference to a warning symbol. */ | |
1104 | ||
b34976b6 | 1105 | static bfd_boolean |
252b5132 | 1106 | warning_callback (info, warning, symbol, abfd, section, address) |
87f2a346 | 1107 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1108 | const char *warning; |
1109 | const char *symbol; | |
1110 | bfd *abfd; | |
1111 | asection *section; | |
1112 | bfd_vma address; | |
1113 | { | |
1114 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1115 | have a cleaner interface, but what? */ | |
1116 | if (! config.warn_multiple_gp | |
1117 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1118 | return TRUE; |
252b5132 RH |
1119 | |
1120 | if (section != NULL) | |
1121 | einfo ("%C: %s\n", abfd, section, address, warning); | |
1122 | else if (abfd == NULL) | |
1123 | einfo ("%P: %s\n", warning); | |
1124 | else if (symbol == NULL) | |
1125 | einfo ("%B: %s\n", abfd, warning); | |
1126 | else | |
1127 | { | |
1128 | lang_input_statement_type *entry; | |
1129 | asymbol **asymbols; | |
1130 | struct warning_callback_info info; | |
1131 | ||
1132 | /* Look through the relocs to see if we can find a plausible | |
1133 | address. */ | |
1134 | ||
1135 | entry = (lang_input_statement_type *) abfd->usrdata; | |
1136 | if (entry != NULL && entry->asymbols != NULL) | |
1137 | asymbols = entry->asymbols; | |
1138 | else | |
1139 | { | |
1140 | long symsize; | |
1141 | long symbol_count; | |
1142 | ||
1143 | symsize = bfd_get_symtab_upper_bound (abfd); | |
1144 | if (symsize < 0) | |
1145 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1146 | asymbols = (asymbol **) xmalloc (symsize); | |
1147 | symbol_count = bfd_canonicalize_symtab (abfd, asymbols); | |
1148 | if (symbol_count < 0) | |
1149 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1150 | if (entry != NULL) | |
1151 | { | |
1152 | entry->asymbols = asymbols; | |
1153 | entry->symbol_count = symbol_count; | |
1154 | } | |
1155 | } | |
1156 | ||
b34976b6 | 1157 | info.found = FALSE; |
252b5132 RH |
1158 | info.warning = warning; |
1159 | info.symbol = symbol; | |
1160 | info.asymbols = asymbols; | |
1161 | bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info); | |
1162 | ||
1163 | if (! info.found) | |
1164 | einfo ("%B: %s\n", abfd, warning); | |
1165 | ||
1166 | if (entry == NULL) | |
1167 | free (asymbols); | |
1168 | } | |
1169 | ||
b34976b6 | 1170 | return TRUE; |
252b5132 RH |
1171 | } |
1172 | ||
1173 | /* This is called by warning_callback for each section. It checks the | |
1174 | relocs of the section to see if it can find a reference to the | |
1175 | symbol which triggered the warning. If it can, it uses the reloc | |
1176 | to give an error message with a file and line number. */ | |
1177 | ||
1178 | static void | |
1179 | warning_find_reloc (abfd, sec, iarg) | |
1180 | bfd *abfd; | |
1181 | asection *sec; | |
1182 | PTR iarg; | |
1183 | { | |
1184 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; | |
1185 | long relsize; | |
1186 | arelent **relpp; | |
1187 | long relcount; | |
1188 | arelent **p, **pend; | |
1189 | ||
1190 | if (info->found) | |
1191 | return; | |
1192 | ||
1193 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1194 | if (relsize < 0) | |
1195 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1196 | if (relsize == 0) | |
1197 | return; | |
1198 | ||
1199 | relpp = (arelent **) xmalloc (relsize); | |
1200 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); | |
1201 | if (relcount < 0) | |
1202 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1203 | ||
1204 | p = relpp; | |
1205 | pend = p + relcount; | |
1206 | for (; p < pend && *p != NULL; p++) | |
1207 | { | |
1208 | arelent *q = *p; | |
1209 | ||
1210 | if (q->sym_ptr_ptr != NULL | |
1211 | && *q->sym_ptr_ptr != NULL | |
1212 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1213 | { | |
1214 | /* We found a reloc for the symbol we are looking for. */ | |
1215 | einfo ("%C: %s\n", abfd, sec, q->address, info->warning); | |
b34976b6 | 1216 | info->found = TRUE; |
252b5132 RH |
1217 | break; |
1218 | } | |
1219 | } | |
1220 | ||
1221 | free (relpp); | |
1222 | } | |
1223 | ||
1224 | /* This is called when an undefined symbol is found. */ | |
1225 | ||
b34976b6 | 1226 | static bfd_boolean |
b6f29aaa | 1227 | undefined_symbol (info, name, abfd, section, address, fatal) |
87f2a346 | 1228 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1229 | const char *name; |
1230 | bfd *abfd; | |
1231 | asection *section; | |
1232 | bfd_vma address; | |
b34976b6 | 1233 | bfd_boolean fatal ATTRIBUTE_UNUSED; |
252b5132 RH |
1234 | { |
1235 | static char *error_name; | |
1236 | static unsigned int error_count; | |
1237 | ||
1238 | #define MAX_ERRORS_IN_A_ROW 5 | |
1239 | ||
1240 | if (config.warn_once) | |
1241 | { | |
1242 | static struct bfd_hash_table *hash; | |
1243 | ||
1244 | /* Only warn once about a particular undefined symbol. */ | |
1245 | ||
1246 | if (hash == NULL) | |
1247 | { | |
1248 | hash = ((struct bfd_hash_table *) | |
1249 | xmalloc (sizeof (struct bfd_hash_table))); | |
1250 | if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) | |
1251 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); | |
1252 | } | |
1253 | ||
b34976b6 AM |
1254 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1255 | return TRUE; | |
252b5132 | 1256 | |
b34976b6 | 1257 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1258 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1259 | } | |
1260 | ||
1261 | /* We never print more than a reasonable number of errors in a row | |
1262 | for a single symbol. */ | |
1263 | if (error_name != (char *) NULL | |
1264 | && strcmp (name, error_name) == 0) | |
1265 | ++error_count; | |
1266 | else | |
1267 | { | |
1268 | error_count = 0; | |
1269 | if (error_name != (char *) NULL) | |
1270 | free (error_name); | |
d1b2b2dc | 1271 | error_name = xstrdup (name); |
252b5132 RH |
1272 | } |
1273 | ||
1274 | if (section != NULL) | |
1275 | { | |
1276 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa L |
1277 | { |
1278 | einfo (_("%C: undefined reference to `%T'\n"), | |
1279 | abfd, section, address, name); | |
1280 | if (fatal) | |
1281 | einfo ("%X"); | |
1282 | } | |
252b5132 RH |
1283 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
1284 | einfo (_("%D: more undefined references to `%T' follow\n"), | |
1285 | abfd, section, address, name); | |
1286 | } | |
1287 | else | |
1288 | { | |
1289 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa L |
1290 | { |
1291 | einfo (_("%B: undefined reference to `%T'\n"), | |
1292 | abfd, name); | |
1293 | if (fatal) | |
1294 | einfo ("%X"); | |
1295 | } | |
252b5132 RH |
1296 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
1297 | einfo (_("%B: more undefined references to `%T' follow\n"), | |
1298 | abfd, name); | |
1299 | } | |
1300 | ||
b34976b6 | 1301 | return TRUE; |
252b5132 RH |
1302 | } |
1303 | ||
1304 | /* This is called when a reloc overflows. */ | |
1305 | ||
b34976b6 | 1306 | static bfd_boolean |
252b5132 | 1307 | reloc_overflow (info, name, reloc_name, addend, abfd, section, address) |
87f2a346 | 1308 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1309 | const char *name; |
1310 | const char *reloc_name; | |
1311 | bfd_vma addend; | |
1312 | bfd *abfd; | |
1313 | asection *section; | |
1314 | bfd_vma address; | |
1315 | { | |
1316 | if (abfd == (bfd *) NULL) | |
1317 | einfo (_("%P%X: generated")); | |
1318 | else | |
1319 | einfo ("%X%C:", abfd, section, address); | |
1320 | einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name); | |
1321 | if (addend != 0) | |
1322 | einfo ("+%v", addend); | |
1323 | einfo ("\n"); | |
b34976b6 | 1324 | return TRUE; |
252b5132 RH |
1325 | } |
1326 | ||
1327 | /* This is called when a dangerous relocation is made. */ | |
1328 | ||
b34976b6 | 1329 | static bfd_boolean |
252b5132 | 1330 | reloc_dangerous (info, message, abfd, section, address) |
87f2a346 | 1331 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1332 | const char *message; |
1333 | bfd *abfd; | |
1334 | asection *section; | |
1335 | bfd_vma address; | |
1336 | { | |
1337 | if (abfd == (bfd *) NULL) | |
1338 | einfo (_("%P%X: generated")); | |
1339 | else | |
1340 | einfo ("%X%C:", abfd, section, address); | |
1341 | einfo (_("dangerous relocation: %s\n"), message); | |
b34976b6 | 1342 | return TRUE; |
252b5132 RH |
1343 | } |
1344 | ||
1345 | /* This is called when a reloc is being generated attached to a symbol | |
1346 | that is not being output. */ | |
1347 | ||
b34976b6 | 1348 | static bfd_boolean |
252b5132 | 1349 | unattached_reloc (info, name, abfd, section, address) |
87f2a346 | 1350 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1351 | const char *name; |
1352 | bfd *abfd; | |
1353 | asection *section; | |
1354 | bfd_vma address; | |
1355 | { | |
1356 | if (abfd == (bfd *) NULL) | |
1357 | einfo (_("%P%X: generated")); | |
1358 | else | |
1359 | einfo ("%X%C:", abfd, section, address); | |
1360 | einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name); | |
b34976b6 | 1361 | return TRUE; |
252b5132 RH |
1362 | } |
1363 | ||
1364 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1365 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1366 | using the -y option. */ | |
1367 | ||
b34976b6 | 1368 | static bfd_boolean |
252b5132 RH |
1369 | notice (info, name, abfd, section, value) |
1370 | struct bfd_link_info *info; | |
1371 | const char *name; | |
1372 | bfd *abfd; | |
1373 | asection *section; | |
1374 | bfd_vma value; | |
1375 | { | |
1376 | if (! info->notice_all | |
1377 | || (info->notice_hash != NULL | |
b34976b6 | 1378 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) |
252b5132 RH |
1379 | { |
1380 | if (bfd_is_und_section (section)) | |
1381 | einfo ("%B: reference to %s\n", abfd, name); | |
1382 | else | |
1383 | einfo ("%B: definition of %s\n", abfd, name); | |
1384 | } | |
1385 | ||
1386 | if (command_line.cref || nocrossref_list != NULL) | |
1387 | add_cref (name, abfd, section, value); | |
1388 | ||
b34976b6 | 1389 | return TRUE; |
252b5132 | 1390 | } |