Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
4a43e768 | 3 | 2002, 2003, 2004 |
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 | ||
0125cdf2 | 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 | |
1579bae1 | 54 | extern void *sbrk (); |
252b5132 RH |
55 | #endif |
56 | #endif | |
57 | ||
9c8ebd6a DJ |
58 | #ifndef TARGET_SYSTEM_ROOT |
59 | #define TARGET_SYSTEM_ROOT "" | |
60 | #endif | |
61 | ||
252b5132 RH |
62 | /* EXPORTS */ |
63 | ||
64 | char *default_target; | |
65 | const char *output_filename = "a.out"; | |
66 | ||
67 | /* Name this program was invoked by. */ | |
68 | char *program_name; | |
69 | ||
9c8ebd6a DJ |
70 | /* The prefix for system library directories. */ |
71 | char *ld_sysroot; | |
72 | ||
3fe38064 NC |
73 | /* The canonical representation of ld_sysroot. */ |
74 | char * ld_canon_sysroot; | |
75 | int ld_canon_sysroot_len; | |
76 | ||
6d5e62f8 | 77 | /* The file that we're creating. */ |
252b5132 RH |
78 | bfd *output_bfd = 0; |
79 | ||
80 | /* Set by -G argument, for MIPS ECOFF target. */ | |
81 | int g_switch_value = 8; | |
82 | ||
83 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 84 | bfd_boolean trace_files; |
252b5132 RH |
85 | |
86 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 87 | bfd_boolean trace_file_tries; |
252b5132 RH |
88 | |
89 | /* Nonzero means version number was printed, so exit successfully | |
90 | instead of complaining if no input files are given. */ | |
b34976b6 | 91 | bfd_boolean version_printed; |
252b5132 RH |
92 | |
93 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 94 | bfd_boolean whole_archive; |
252b5132 | 95 | |
4a43e768 AM |
96 | /* Nonzero means create DT_NEEDED entries only if a dynamic library |
97 | actually satisfies some reference in a regular object. */ | |
98 | bfd_boolean as_needed; | |
99 | ||
e56f61be L |
100 | /* Nonzero means never create DT_NEEDED entries for dynamic libraries |
101 | in DT_NEEDED tags. */ | |
102 | bfd_boolean add_needed = TRUE; | |
103 | ||
b34976b6 AM |
104 | /* TRUE if we should demangle symbol names. */ |
105 | bfd_boolean demangling; | |
252b5132 RH |
106 | |
107 | args_type command_line; | |
108 | ||
109 | ld_config_type config; | |
110 | ||
bcaa7b3e L |
111 | sort_type sort_section; |
112 | ||
0125cdf2 | 113 | static char *get_emulation |
1579bae1 | 114 | (int, char **); |
0125cdf2 | 115 | static void set_scripts_dir |
1579bae1 | 116 | (void); |
0125cdf2 | 117 | static bfd_boolean add_archive_element |
1579bae1 | 118 | (struct bfd_link_info *, bfd *, const char *); |
0125cdf2 | 119 | static bfd_boolean multiple_definition |
1579bae1 AM |
120 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
121 | bfd *, asection *, bfd_vma); | |
0125cdf2 | 122 | static bfd_boolean multiple_common |
1579bae1 AM |
123 | (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, |
124 | bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 125 | static bfd_boolean add_to_set |
1579bae1 AM |
126 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
127 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 128 | static bfd_boolean constructor_callback |
1579bae1 AM |
129 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
130 | asection *, bfd_vma); | |
0125cdf2 | 131 | static bfd_boolean warning_callback |
1579bae1 AM |
132 | (struct bfd_link_info *, const char *, const char *, bfd *, |
133 | asection *, bfd_vma); | |
0125cdf2 | 134 | static void warning_find_reloc |
1579bae1 | 135 | (bfd *, asection *, void *); |
0125cdf2 | 136 | static bfd_boolean undefined_symbol |
1579bae1 AM |
137 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
138 | bfd_boolean); | |
0125cdf2 | 139 | static bfd_boolean reloc_overflow |
1579bae1 AM |
140 | (struct bfd_link_info *, const char *, const char *, bfd_vma, |
141 | bfd *, asection *, bfd_vma); | |
0125cdf2 | 142 | static bfd_boolean reloc_dangerous |
1579bae1 | 143 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 144 | static bfd_boolean unattached_reloc |
1579bae1 | 145 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 146 | static bfd_boolean notice |
1579bae1 | 147 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 NC |
148 | |
149 | static struct bfd_link_callbacks link_callbacks = | |
150 | { | |
252b5132 RH |
151 | add_archive_element, |
152 | multiple_definition, | |
153 | multiple_common, | |
154 | add_to_set, | |
155 | constructor_callback, | |
156 | warning_callback, | |
157 | undefined_symbol, | |
158 | reloc_overflow, | |
159 | reloc_dangerous, | |
160 | unattached_reloc, | |
d003868e | 161 | notice |
252b5132 RH |
162 | }; |
163 | ||
164 | struct bfd_link_info link_info; | |
165 | \f | |
166 | static void | |
1579bae1 | 167 | remove_output (void) |
252b5132 | 168 | { |
6d5e62f8 | 169 | if (output_filename) |
252b5132 | 170 | { |
c92c35e7 AC |
171 | if (output_bfd) |
172 | bfd_cache_close (output_bfd); | |
252b5132 RH |
173 | if (delete_output_file_on_failure) |
174 | unlink (output_filename); | |
175 | } | |
176 | } | |
177 | ||
178 | int | |
1579bae1 | 179 | main (int argc, char **argv) |
252b5132 RH |
180 | { |
181 | char *emulation; | |
182 | long start_time = get_run_time (); | |
183 | ||
184 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
185 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
186 | #endif |
187 | #if defined (HAVE_SETLOCALE) | |
188 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
189 | #endif |
190 | bindtextdomain (PACKAGE, LOCALEDIR); | |
191 | textdomain (PACKAGE); | |
192 | ||
193 | program_name = argv[0]; | |
194 | xmalloc_set_program_name (program_name); | |
195 | ||
196 | START_PROGRESS (program_name, 0); | |
197 | ||
198 | bfd_init (); | |
199 | ||
200 | bfd_set_error_program_name (program_name); | |
201 | ||
202 | xatexit (remove_output); | |
203 | ||
9c8ebd6a DJ |
204 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE |
205 | ld_sysroot = make_relative_prefix (program_name, BINDIR, | |
206 | TARGET_SYSTEM_ROOT); | |
0125cdf2 | 207 | |
9c8ebd6a DJ |
208 | if (ld_sysroot) |
209 | { | |
210 | struct stat s; | |
211 | int res = stat (ld_sysroot, &s) == 0 && S_ISDIR (s.st_mode); | |
0125cdf2 | 212 | |
9c8ebd6a DJ |
213 | if (!res) |
214 | { | |
215 | free (ld_sysroot); | |
0125cdf2 | 216 | ld_sysroot = NULL; |
9c8ebd6a DJ |
217 | } |
218 | } | |
0125cdf2 NC |
219 | |
220 | if (! ld_sysroot) | |
221 | { | |
222 | ld_sysroot = make_relative_prefix (program_name, TOOLBINDIR, | |
223 | TARGET_SYSTEM_ROOT); | |
224 | ||
225 | if (ld_sysroot) | |
226 | { | |
227 | struct stat s; | |
228 | int res = stat (ld_sysroot, &s) == 0 && S_ISDIR (s.st_mode); | |
229 | ||
230 | if (!res) | |
231 | { | |
232 | free (ld_sysroot); | |
233 | ld_sysroot = NULL; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | if (! ld_sysroot) | |
9c8ebd6a | 239 | #endif |
0125cdf2 | 240 | ld_sysroot = TARGET_SYSTEM_ROOT; |
9c8ebd6a | 241 | |
3fe38064 NC |
242 | if (ld_sysroot && *ld_sysroot) |
243 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
244 | ||
245 | if (ld_canon_sysroot) | |
246 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
247 | else | |
248 | ld_canon_sysroot_len = -1; | |
249 | ||
252b5132 RH |
250 | /* Set the default BFD target based on the configured target. Doing |
251 | this permits the linker to be configured for a particular target, | |
252 | and linked against a shared BFD library which was configured for | |
253 | a different target. The macro TARGET is defined by Makefile. */ | |
254 | if (! bfd_set_default_target (TARGET)) | |
255 | { | |
256 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
257 | xexit (1); | |
258 | } | |
259 | ||
b47c4208 AM |
260 | #if YYDEBUG |
261 | { | |
262 | extern int yydebug; | |
263 | yydebug = 1; | |
264 | } | |
265 | #endif | |
266 | ||
252b5132 | 267 | /* Initialize the data about options. */ |
b34976b6 AM |
268 | trace_files = trace_file_tries = version_printed = FALSE; |
269 | whole_archive = FALSE; | |
270 | config.build_constructors = TRUE; | |
271 | config.dynamic_link = FALSE; | |
272 | config.has_shared = FALSE; | |
a854a4a7 AM |
273 | config.split_by_reloc = (unsigned) -1; |
274 | config.split_by_file = (bfd_size_type) -1; | |
2d643429 | 275 | config.hash_table_size = 0; |
b34976b6 AM |
276 | command_line.force_common_definition = FALSE; |
277 | command_line.inhibit_common_definition = FALSE; | |
252b5132 RH |
278 | command_line.interpreter = NULL; |
279 | command_line.rpath = NULL; | |
b34976b6 AM |
280 | command_line.warn_mismatch = TRUE; |
281 | command_line.check_section_addresses = TRUE; | |
312b768e | 282 | command_line.accept_unknown_input_arch = FALSE; |
35835446 | 283 | command_line.reduce_memory_overheads = FALSE; |
252b5132 | 284 | |
bcaa7b3e L |
285 | sort_section = none; |
286 | ||
252b5132 RH |
287 | /* We initialize DEMANGLING based on the environment variable |
288 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
289 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
290 | environment. Acting the same way here lets us provide the same | |
291 | interface by default. */ | |
292 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
293 | ||
1049f94e | 294 | link_info.relocatable = FALSE; |
b34976b6 | 295 | link_info.emitrelocations = FALSE; |
b5067602 | 296 | link_info.task_link = FALSE; |
b34976b6 | 297 | link_info.shared = FALSE; |
36af4a4e JJ |
298 | link_info.pie = FALSE; |
299 | link_info.executable = FALSE; | |
b34976b6 AM |
300 | link_info.symbolic = FALSE; |
301 | link_info.export_dynamic = FALSE; | |
302 | link_info.static_link = FALSE; | |
303 | link_info.traditional_format = FALSE; | |
304 | link_info.optimize = FALSE; | |
560e09e9 NC |
305 | link_info.unresolved_syms_in_objects = RM_NOT_YET_SET; |
306 | link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET; | |
b34976b6 AM |
307 | link_info.allow_multiple_definition = FALSE; |
308 | link_info.allow_undefined_version = TRUE; | |
b5067602 AM |
309 | link_info.keep_memory = TRUE; |
310 | link_info.notice_all = FALSE; | |
311 | link_info.nocopyreloc = FALSE; | |
312 | link_info.new_dtags = FALSE; | |
313 | link_info.combreloc = TRUE; | |
314 | link_info.eh_frame_hdr = FALSE; | |
8c37241b | 315 | link_info.relro = FALSE; |
d5cd3933 | 316 | link_info.strip_discarded = TRUE; |
252b5132 | 317 | link_info.strip = strip_none; |
f5fa8ca2 | 318 | link_info.discard = discard_sec_merge; |
b5067602 AM |
319 | link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; |
320 | link_info.callbacks = &link_callbacks; | |
252b5132 RH |
321 | link_info.hash = NULL; |
322 | link_info.keep_hash = NULL; | |
252b5132 RH |
323 | link_info.notice_hash = NULL; |
324 | link_info.wrap_hash = NULL; | |
b5067602 AM |
325 | link_info.input_bfds = NULL; |
326 | link_info.create_object_symbols_section = NULL; | |
327 | link_info.gc_sym_list = NULL; | |
328 | link_info.base_file = NULL; | |
3dbf70a2 MM |
329 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
330 | and _fini symbols. We are compatible. */ | |
331 | link_info.init_function = "_init"; | |
332 | link_info.fini_function = "_fini"; | |
e0076ab3 | 333 | link_info.pei386_auto_import = -1; |
b34976b6 | 334 | link_info.pei386_runtime_pseudo_reloc = FALSE; |
db6751f2 | 335 | link_info.spare_dynamic_tags = 5; |
1579bae1 AM |
336 | link_info.flags = 0; |
337 | link_info.flags_1 = 0; | |
d9c458fc | 338 | link_info.need_relax_finalize = FALSE; |
3dbf70a2 | 339 | |
252b5132 RH |
340 | ldfile_add_arch (""); |
341 | ||
b34976b6 AM |
342 | config.make_executable = TRUE; |
343 | force_make_executable = FALSE; | |
344 | config.magic_demand_paged = TRUE; | |
345 | config.text_read_only = TRUE; | |
252b5132 RH |
346 | |
347 | emulation = get_emulation (argc, argv); | |
348 | ldemul_choose_mode (emulation); | |
742aeb63 | 349 | default_target = ldemul_choose_target (argc, argv); |
252b5132 RH |
350 | lang_init (); |
351 | ldemul_before_parse (); | |
b34976b6 | 352 | lang_has_input_file = FALSE; |
252b5132 RH |
353 | parse_args (argc, argv); |
354 | ||
2d643429 NC |
355 | if (config.hash_table_size != 0) |
356 | bfd_hash_set_default_size (config.hash_table_size); | |
357 | ||
252b5132 RH |
358 | ldemul_set_symbols (); |
359 | ||
1049f94e | 360 | if (link_info.relocatable) |
252b5132 RH |
361 | { |
362 | if (command_line.gc_sections) | |
363 | einfo ("%P%F: --gc-sections and -r may not be used together\n"); | |
252b5132 RH |
364 | else if (command_line.relax) |
365 | einfo (_("%P%F: --relax and -r may not be used together\n")); | |
366 | if (link_info.shared) | |
367 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
368 | } | |
369 | ||
7333607e JJ |
370 | if (! link_info.shared) |
371 | { | |
372 | if (command_line.filter_shlib) | |
e97cb84f | 373 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 374 | if (command_line.auxiliary_filters) |
e97cb84f | 375 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
376 | } |
377 | ||
36af4a4e JJ |
378 | if (! link_info.shared || link_info.pie) |
379 | link_info.executable = TRUE; | |
380 | ||
252b5132 RH |
381 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
382 | don't see how else this can be handled, since in this case we | |
383 | must preserve all externally visible symbols. */ | |
1049f94e | 384 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
385 | { |
386 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 387 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
388 | link_info.discard = discard_all; |
389 | } | |
390 | ||
391 | /* This essentially adds another -L directory so this must be done after | |
392 | the -L's in argv have been processed. */ | |
393 | set_scripts_dir (); | |
394 | ||
b9a8de1e NC |
395 | /* If we have not already opened and parsed a linker script |
396 | read the emulation's appropriate default script. */ | |
b90e1c6f | 397 | if (saved_script_handle == NULL) |
252b5132 | 398 | { |
252b5132 | 399 | int isfile; |
b7a26f91 | 400 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
401 | |
402 | if (isfile) | |
403 | ldfile_open_command_file (s); | |
404 | else | |
b7a26f91 | 405 | { |
252b5132 RH |
406 | lex_string = s; |
407 | lex_redirect (s); | |
408 | } | |
409 | parser_input = input_script; | |
410 | yyparse (); | |
411 | lex_string = NULL; | |
412 | } | |
413 | ||
b9a8de1e NC |
414 | if (trace_file_tries) |
415 | { | |
9cb61eab AM |
416 | if (saved_script_handle) |
417 | info_msg (_("using external linker script:")); | |
418 | else | |
419 | info_msg (_("using internal linker script:")); | |
420 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
421 | |
422 | if (saved_script_handle) | |
423 | { | |
74699268 | 424 | static const int ld_bufsz = 8193; |
b9a8de1e | 425 | size_t n; |
74699268 | 426 | char *buf = xmalloc (ld_bufsz); |
b9a8de1e NC |
427 | |
428 | rewind (saved_script_handle); | |
74699268 | 429 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 430 | { |
b7a26f91 | 431 | buf[n] = 0; |
b9a8de1e NC |
432 | info_msg (buf); |
433 | } | |
434 | rewind (saved_script_handle); | |
435 | free (buf); | |
436 | } | |
437 | else | |
438 | { | |
439 | int isfile; | |
440 | ||
b7a26f91 | 441 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 442 | } |
b7a26f91 | 443 | |
b9a8de1e NC |
444 | info_msg ("\n==================================================\n"); |
445 | } | |
446 | ||
252b5132 RH |
447 | lang_final (); |
448 | ||
b34976b6 | 449 | if (!lang_has_input_file) |
252b5132 RH |
450 | { |
451 | if (version_printed) | |
452 | xexit (0); | |
453 | einfo (_("%P%F: no input files\n")); | |
454 | } | |
455 | ||
456 | if (trace_files) | |
0125cdf2 | 457 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
458 | |
459 | ldemul_after_parse (); | |
460 | ||
252b5132 RH |
461 | if (config.map_filename) |
462 | { | |
463 | if (strcmp (config.map_filename, "-") == 0) | |
464 | { | |
465 | config.map_file = stdout; | |
466 | } | |
467 | else | |
468 | { | |
469 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
470 | if (config.map_file == (FILE *) NULL) | |
471 | { | |
472 | bfd_set_error (bfd_error_system_call); | |
473 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
474 | config.map_filename); | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
252b5132 RH |
479 | lang_process (); |
480 | ||
481 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 482 | symbols, and possibly multiple definitions. */ |
1049f94e | 483 | if (link_info.relocatable) |
252b5132 RH |
484 | output_bfd->flags &= ~EXEC_P; |
485 | else | |
486 | output_bfd->flags |= EXEC_P; | |
487 | ||
488 | ldwrite (); | |
489 | ||
490 | if (config.map_file != NULL) | |
491 | lang_map (); | |
492 | if (command_line.cref) | |
493 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
494 | if (nocrossref_list != NULL) | |
495 | check_nocrossrefs (); | |
496 | ||
1049f94e | 497 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 498 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 499 | want to ignore for relocatable output?) */ |
b34976b6 | 500 | if (!config.make_executable && !force_make_executable) |
252b5132 | 501 | { |
b34976b6 | 502 | if (trace_files) |
0125cdf2 NC |
503 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
504 | output_filename); | |
252b5132 RH |
505 | |
506 | /* The file will be removed by remove_output. */ | |
252b5132 RH |
507 | xexit (1); |
508 | } | |
509 | else | |
510 | { | |
511 | if (! bfd_close (output_bfd)) | |
512 | einfo (_("%F%B: final close failed: %E\n"), output_bfd); | |
513 | ||
514 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
515 | executable file and it doesn't end in .exe, copy it to one |
516 | which does. */ | |
1049f94e | 517 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
518 | { |
519 | int len = strlen (output_filename); | |
0125cdf2 | 520 | |
6d5e62f8 | 521 | if (len < 4 |
252b5132 RH |
522 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
523 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
524 | { | |
525 | FILE *src; | |
526 | FILE *dst; | |
527 | const int bsize = 4096; | |
528 | char *buf = xmalloc (bsize); | |
529 | int l; | |
530 | char *dst_name = xmalloc (len + 5); | |
0125cdf2 | 531 | |
252b5132 RH |
532 | strcpy (dst_name, output_filename); |
533 | strcat (dst_name, ".exe"); | |
534 | src = fopen (output_filename, FOPEN_RB); | |
535 | dst = fopen (dst_name, FOPEN_WB); | |
536 | ||
537 | if (!src) | |
1579bae1 AM |
538 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
539 | output_filename); | |
252b5132 | 540 | if (!dst) |
1579bae1 AM |
541 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
542 | dst_name); | |
252b5132 RH |
543 | while ((l = fread (buf, 1, bsize, src)) > 0) |
544 | { | |
545 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 546 | |
252b5132 | 547 | if (done != l) |
0125cdf2 | 548 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 549 | } |
0125cdf2 | 550 | |
252b5132 RH |
551 | fclose (src); |
552 | if (fclose (dst) == EOF) | |
0125cdf2 | 553 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
554 | free (dst_name); |
555 | free (buf); | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | END_PROGRESS (program_name); | |
561 | ||
562 | if (config.stats) | |
563 | { | |
564 | #ifdef HAVE_SBRK | |
1579bae1 | 565 | char *lim = sbrk (0); |
252b5132 RH |
566 | #endif |
567 | long run_time = get_run_time () - start_time; | |
568 | ||
569 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), | |
570 | program_name, run_time / 1000000, run_time % 1000000); | |
571 | #ifdef HAVE_SBRK | |
572 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
573 | (long) (lim - (char *) &environ)); | |
574 | #endif | |
575 | } | |
576 | ||
577 | /* Prevent remove_output from doing anything, after a successful link. */ | |
578 | output_filename = NULL; | |
579 | ||
580 | xexit (0); | |
581 | return 0; | |
582 | } | |
583 | ||
584 | /* We need to find any explicitly given emulation in order to initialize the | |
585 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
586 | ||
587 | static char * | |
1579bae1 | 588 | get_emulation (int argc, char **argv) |
252b5132 RH |
589 | { |
590 | char *emulation; | |
591 | int i; | |
592 | ||
593 | emulation = getenv (EMULATION_ENVIRON); | |
594 | if (emulation == NULL) | |
595 | emulation = DEFAULT_EMULATION; | |
596 | ||
597 | for (i = 1; i < argc; i++) | |
598 | { | |
599 | if (!strncmp (argv[i], "-m", 2)) | |
600 | { | |
601 | if (argv[i][2] == '\0') | |
602 | { | |
603 | /* -m EMUL */ | |
604 | if (i < argc - 1) | |
605 | { | |
606 | emulation = argv[i + 1]; | |
607 | i++; | |
608 | } | |
609 | else | |
0125cdf2 | 610 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
611 | } |
612 | else if (strcmp (argv[i], "-mips1") == 0 | |
613 | || strcmp (argv[i], "-mips2") == 0 | |
614 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 615 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
616 | || strcmp (argv[i], "-mips5") == 0 |
617 | || strcmp (argv[i], "-mips32") == 0 | |
618 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
619 | || strcmp (argv[i], "-mips64") == 0 |
620 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 621 | { |
31d677f9 | 622 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
623 | passed to the linker by some MIPS compilers. They |
624 | generally tell the linker to use a slightly different | |
625 | library path. Perhaps someday these should be | |
626 | implemented as emulations; until then, we just ignore | |
627 | the arguments and hope that nobody ever creates | |
628 | emulations named ips1, ips2 or ips3. */ | |
629 | } | |
630 | else if (strcmp (argv[i], "-m486") == 0) | |
631 | { | |
632 | /* FIXME: The argument -m486 is passed to the linker on | |
633 | some Linux systems. Hope that nobody creates an | |
634 | emulation named 486. */ | |
635 | } | |
636 | else | |
637 | { | |
638 | /* -mEMUL */ | |
639 | emulation = &argv[i][2]; | |
640 | } | |
641 | } | |
642 | } | |
643 | ||
644 | return emulation; | |
645 | } | |
646 | ||
647 | /* If directory DIR contains an "ldscripts" subdirectory, | |
b34976b6 AM |
648 | add DIR to the library search path and return TRUE, |
649 | else return FALSE. */ | |
252b5132 | 650 | |
b34976b6 | 651 | static bfd_boolean |
1579bae1 | 652 | check_for_scripts_dir (char *dir) |
252b5132 RH |
653 | { |
654 | size_t dirlen; | |
655 | char *buf; | |
656 | struct stat s; | |
b34976b6 | 657 | bfd_boolean res; |
252b5132 RH |
658 | |
659 | dirlen = strlen (dir); | |
660 | /* sizeof counts the terminating NUL. */ | |
1579bae1 | 661 | buf = xmalloc (dirlen + sizeof ("/ldscripts")); |
252b5132 RH |
662 | sprintf (buf, "%s/ldscripts", dir); |
663 | ||
664 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
665 | free (buf); | |
666 | if (res) | |
b34976b6 | 667 | ldfile_add_library_path (dir, FALSE); |
252b5132 RH |
668 | return res; |
669 | } | |
670 | ||
671 | /* Set the default directory for finding script files. | |
672 | Libraries will be searched for here too, but that's ok. | |
673 | We look for the "ldscripts" directory in: | |
674 | ||
cdc0d45e DJ |
675 | SCRIPTDIR (passed from Makefile) |
676 | (adjusted according to the current location of the binary) | |
252b5132 RH |
677 | SCRIPTDIR (passed from Makefile) |
678 | the dir where this program is (for using it from the build tree) | |
cdc0d45e | 679 | the dir where this program is/../lib |
0125cdf2 | 680 | (for installing the tool suite elsewhere). */ |
252b5132 RH |
681 | |
682 | static void | |
1579bae1 | 683 | set_scripts_dir (void) |
252b5132 RH |
684 | { |
685 | char *end, *dir; | |
686 | size_t dirlen; | |
5ed6aba4 | 687 | bfd_boolean found; |
252b5132 | 688 | |
cdc0d45e | 689 | dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR); |
cdc0d45e | 690 | if (dir) |
5ed6aba4 NC |
691 | { |
692 | found = check_for_scripts_dir (dir); | |
693 | free (dir); | |
694 | if (found) | |
695 | return; | |
696 | } | |
cdc0d45e | 697 | |
4ca1b790 | 698 | dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR); |
4ca1b790 | 699 | if (dir) |
5ed6aba4 NC |
700 | { |
701 | found = check_for_scripts_dir (dir); | |
702 | free (dir); | |
703 | if (found) | |
704 | return; | |
705 | } | |
4ca1b790 | 706 | |
252b5132 | 707 | if (check_for_scripts_dir (SCRIPTDIR)) |
6d5e62f8 KH |
708 | /* We've been installed normally. */ |
709 | return; | |
252b5132 RH |
710 | |
711 | /* Look for "ldscripts" in the dir where our binary is. */ | |
712 | end = strrchr (program_name, '/'); | |
5af11cab AM |
713 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
714 | { | |
715 | /* We could have \foo\bar, or /foo\bar. */ | |
716 | char *bslash = strrchr (program_name, '\\'); | |
0125cdf2 | 717 | |
2ab47eed | 718 | if (end == NULL || (bslash != NULL && bslash > end)) |
5af11cab AM |
719 | end = bslash; |
720 | } | |
721 | #endif | |
252b5132 RH |
722 | |
723 | if (end == NULL) | |
0125cdf2 NC |
724 | /* Don't look for ldscripts in the current directory. There is |
725 | too much potential for confusion. */ | |
726 | return; | |
252b5132 RH |
727 | |
728 | dirlen = end - program_name; | |
729 | /* Make a copy of program_name in dir. | |
730 | Leave room for later "/../lib". */ | |
1579bae1 | 731 | dir = xmalloc (dirlen + 8); |
252b5132 RH |
732 | strncpy (dir, program_name, dirlen); |
733 | dir[dirlen] = '\0'; | |
734 | ||
735 | if (check_for_scripts_dir (dir)) | |
5ed6aba4 NC |
736 | { |
737 | free (dir); | |
738 | return; | |
739 | } | |
252b5132 RH |
740 | |
741 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
742 | strcpy (dir + dirlen, "/../lib"); | |
5ed6aba4 | 743 | check_for_scripts_dir (dir); |
6d5e62f8 | 744 | free (dir); |
252b5132 RH |
745 | } |
746 | ||
747 | void | |
1579bae1 | 748 | add_ysym (const char *name) |
252b5132 | 749 | { |
1579bae1 | 750 | if (link_info.notice_hash == NULL) |
252b5132 | 751 | { |
1579bae1 | 752 | link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table)); |
252b5132 RH |
753 | if (! bfd_hash_table_init_n (link_info.notice_hash, |
754 | bfd_hash_newfunc, | |
755 | 61)) | |
756 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
6d5e62f8 | 757 | } |
252b5132 | 758 | |
1579bae1 | 759 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
760 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
761 | } | |
762 | ||
763 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
764 | ||
765 | void | |
1579bae1 | 766 | add_wrap (const char *name) |
252b5132 RH |
767 | { |
768 | if (link_info.wrap_hash == NULL) | |
769 | { | |
1579bae1 | 770 | link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table)); |
252b5132 RH |
771 | if (! bfd_hash_table_init_n (link_info.wrap_hash, |
772 | bfd_hash_newfunc, | |
773 | 61)) | |
774 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
775 | } | |
0125cdf2 | 776 | |
b34976b6 | 777 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
778 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
779 | } | |
780 | ||
781 | /* Handle the -retain-symbols-file option. */ | |
782 | ||
783 | void | |
1579bae1 | 784 | add_keepsyms_file (const char *filename) |
252b5132 RH |
785 | { |
786 | FILE *file; | |
787 | char *buf; | |
788 | size_t bufsize; | |
789 | int c; | |
790 | ||
791 | if (link_info.strip == strip_some) | |
792 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
793 | ||
794 | file = fopen (filename, "r"); | |
1579bae1 | 795 | if (file == NULL) |
252b5132 RH |
796 | { |
797 | bfd_set_error (bfd_error_system_call); | |
798 | einfo ("%X%P: %s: %E\n", filename); | |
799 | return; | |
800 | } | |
801 | ||
1579bae1 | 802 | link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table)); |
252b5132 RH |
803 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) |
804 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); | |
805 | ||
806 | bufsize = 100; | |
1579bae1 | 807 | buf = xmalloc (bufsize); |
252b5132 RH |
808 | |
809 | c = getc (file); | |
810 | while (c != EOF) | |
811 | { | |
3882b010 | 812 | while (ISSPACE (c)) |
252b5132 RH |
813 | c = getc (file); |
814 | ||
815 | if (c != EOF) | |
816 | { | |
817 | size_t len = 0; | |
818 | ||
3882b010 | 819 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
820 | { |
821 | buf[len] = c; | |
822 | ++len; | |
823 | if (len >= bufsize) | |
824 | { | |
825 | bufsize *= 2; | |
826 | buf = xrealloc (buf, bufsize); | |
827 | } | |
828 | c = getc (file); | |
829 | } | |
830 | ||
831 | buf[len] = '\0'; | |
832 | ||
1579bae1 | 833 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
834 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
835 | } | |
836 | } | |
837 | ||
838 | if (link_info.strip != strip_none) | |
839 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
840 | ||
5ed6aba4 | 841 | free (buf); |
252b5132 RH |
842 | link_info.strip = strip_some; |
843 | } | |
844 | \f | |
845 | /* Callbacks from the BFD linker routines. */ | |
846 | ||
847 | /* This is called when BFD has decided to include an archive member in | |
848 | a link. */ | |
849 | ||
b34976b6 | 850 | static bfd_boolean |
1579bae1 AM |
851 | add_archive_element (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
852 | bfd *abfd, | |
853 | const char *name) | |
252b5132 RH |
854 | { |
855 | lang_input_statement_type *input; | |
856 | ||
1579bae1 | 857 | input = xmalloc (sizeof (lang_input_statement_type)); |
252b5132 RH |
858 | input->filename = abfd->filename; |
859 | input->local_sym_name = abfd->filename; | |
860 | input->the_bfd = abfd; | |
861 | input->asymbols = NULL; | |
862 | input->next = NULL; | |
b34976b6 AM |
863 | input->just_syms_flag = FALSE; |
864 | input->loaded = FALSE; | |
865 | input->search_dirs_flag = FALSE; | |
252b5132 RH |
866 | |
867 | /* FIXME: The following fields are not set: header.next, | |
868 | header.type, closed, passive_position, symbol_count, | |
869 | next_real_file, is_archive, target, real. This bit of code is | |
870 | from the old decode_library_subfile function. I don't know | |
871 | whether any of those fields matters. */ | |
872 | ||
873 | ldlang_add_file (input); | |
874 | ||
1579bae1 | 875 | if (config.map_file != NULL) |
252b5132 | 876 | { |
b34976b6 | 877 | static bfd_boolean header_printed; |
252b5132 RH |
878 | struct bfd_link_hash_entry *h; |
879 | bfd *from; | |
880 | int len; | |
881 | ||
b34976b6 | 882 | h = bfd_link_hash_lookup (link_info.hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
883 | |
884 | if (h == NULL) | |
885 | from = NULL; | |
886 | else | |
887 | { | |
888 | switch (h->type) | |
889 | { | |
890 | default: | |
891 | from = NULL; | |
892 | break; | |
893 | ||
894 | case bfd_link_hash_defined: | |
895 | case bfd_link_hash_defweak: | |
896 | from = h->u.def.section->owner; | |
897 | break; | |
898 | ||
899 | case bfd_link_hash_undefined: | |
900 | case bfd_link_hash_undefweak: | |
901 | from = h->u.undef.abfd; | |
902 | break; | |
903 | ||
904 | case bfd_link_hash_common: | |
905 | from = h->u.c.p->section->owner; | |
906 | break; | |
907 | } | |
908 | } | |
909 | ||
910 | if (! header_printed) | |
911 | { | |
912 | char buf[100]; | |
913 | ||
e3c8793a | 914 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 915 | minfo ("%s", buf); |
b34976b6 | 916 | header_printed = TRUE; |
252b5132 RH |
917 | } |
918 | ||
919 | if (bfd_my_archive (abfd) == NULL) | |
920 | { | |
921 | minfo ("%s", bfd_get_filename (abfd)); | |
922 | len = strlen (bfd_get_filename (abfd)); | |
923 | } | |
924 | else | |
925 | { | |
926 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
927 | bfd_get_filename (abfd)); | |
928 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
929 | + strlen (bfd_get_filename (abfd)) | |
930 | + 2); | |
931 | } | |
932 | ||
933 | if (len >= 29) | |
934 | { | |
935 | print_nl (); | |
936 | len = 0; | |
937 | } | |
938 | while (len < 30) | |
939 | { | |
940 | print_space (); | |
941 | ++len; | |
942 | } | |
943 | ||
944 | if (from != NULL) | |
945 | minfo ("%B ", from); | |
946 | if (h != NULL) | |
947 | minfo ("(%T)\n", h->root.string); | |
948 | else | |
949 | minfo ("(%s)\n", name); | |
950 | } | |
951 | ||
952 | if (trace_files || trace_file_tries) | |
953 | info_msg ("%I\n", input); | |
954 | ||
b34976b6 | 955 | return TRUE; |
252b5132 RH |
956 | } |
957 | ||
958 | /* This is called when BFD has discovered a symbol which is defined | |
959 | multiple times. */ | |
960 | ||
b34976b6 | 961 | static bfd_boolean |
1579bae1 AM |
962 | multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
963 | const char *name, | |
964 | bfd *obfd, | |
965 | asection *osec, | |
966 | bfd_vma oval, | |
967 | bfd *nbfd, | |
968 | asection *nsec, | |
969 | bfd_vma nval) | |
252b5132 RH |
970 | { |
971 | /* If either section has the output_section field set to | |
972 | bfd_abs_section_ptr, it means that the section is being | |
973 | discarded, and this is not really a multiple definition at all. | |
974 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
975 | sections which are being discarded. */ | |
976 | if ((osec->output_section != NULL | |
977 | && ! bfd_is_abs_section (osec) | |
978 | && bfd_is_abs_section (osec->output_section)) | |
979 | || (nsec->output_section != NULL | |
980 | && ! bfd_is_abs_section (nsec) | |
981 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 982 | return TRUE; |
252b5132 RH |
983 | |
984 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
985 | nbfd, nsec, nval, name); | |
1579bae1 | 986 | if (obfd != NULL) |
252b5132 | 987 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 NC |
988 | |
989 | if (command_line.relax) | |
990 | { | |
991 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
992 | command_line.relax = 0; | |
993 | } | |
6d5e62f8 | 994 | |
b34976b6 | 995 | return TRUE; |
252b5132 RH |
996 | } |
997 | ||
998 | /* This is called when there is a definition of a common symbol, or | |
999 | when a common symbol is found for a symbol that is already defined, | |
1000 | or when two common symbols are found. We only do something if | |
1001 | -warn-common was used. */ | |
1002 | ||
b34976b6 | 1003 | static bfd_boolean |
1579bae1 AM |
1004 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1005 | const char *name, | |
1006 | bfd *obfd, | |
1007 | enum bfd_link_hash_type otype, | |
1008 | bfd_vma osize, | |
1009 | bfd *nbfd, | |
1010 | enum bfd_link_hash_type ntype, | |
1011 | bfd_vma nsize) | |
252b5132 RH |
1012 | { |
1013 | if (! config.warn_common) | |
b34976b6 | 1014 | return TRUE; |
252b5132 RH |
1015 | |
1016 | if (ntype == bfd_link_hash_defined | |
1017 | || ntype == bfd_link_hash_defweak | |
1018 | || ntype == bfd_link_hash_indirect) | |
1019 | { | |
1020 | ASSERT (otype == bfd_link_hash_common); | |
1021 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1022 | nbfd, name); | |
1023 | if (obfd != NULL) | |
1024 | einfo (_("%B: warning: common is here\n"), obfd); | |
1025 | } | |
1026 | else if (otype == bfd_link_hash_defined | |
1027 | || otype == bfd_link_hash_defweak | |
1028 | || otype == bfd_link_hash_indirect) | |
1029 | { | |
1030 | ASSERT (ntype == bfd_link_hash_common); | |
1031 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1032 | nbfd, name); | |
1033 | if (obfd != NULL) | |
1034 | einfo (_("%B: warning: defined here\n"), obfd); | |
1035 | } | |
1036 | else | |
1037 | { | |
1038 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1039 | if (osize > nsize) | |
1040 | { | |
1041 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1042 | nbfd, name); | |
1043 | if (obfd != NULL) | |
1044 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1045 | } | |
1046 | else if (nsize > osize) | |
1047 | { | |
1048 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1049 | nbfd, name); | |
1050 | if (obfd != NULL) | |
1051 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1056 | if (obfd != NULL) | |
1057 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1058 | } | |
1059 | } | |
1060 | ||
b34976b6 | 1061 | return TRUE; |
252b5132 RH |
1062 | } |
1063 | ||
1064 | /* This is called when BFD has discovered a set element. H is the | |
1065 | entry in the linker hash table for the set. SECTION and VALUE | |
1066 | represent a value which should be added to the set. */ | |
1067 | ||
b34976b6 | 1068 | static bfd_boolean |
1579bae1 AM |
1069 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1070 | struct bfd_link_hash_entry *h, | |
1071 | bfd_reloc_code_real_type reloc, | |
1072 | bfd *abfd, | |
1073 | asection *section, | |
1074 | bfd_vma value) | |
252b5132 RH |
1075 | { |
1076 | if (config.warn_constructors) | |
1077 | einfo (_("%P: warning: global constructor %s used\n"), | |
1078 | h->root.string); | |
1079 | ||
1080 | if (! config.build_constructors) | |
b34976b6 | 1081 | return TRUE; |
252b5132 | 1082 | |
1579bae1 | 1083 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1084 | |
1085 | if (h->type == bfd_link_hash_new) | |
1086 | { | |
1087 | h->type = bfd_link_hash_undefined; | |
1088 | h->u.undef.abfd = abfd; | |
1089 | /* We don't call bfd_link_add_undef to add this to the list of | |
1090 | undefined symbols because we are going to define it | |
1091 | ourselves. */ | |
1092 | } | |
1093 | ||
b34976b6 | 1094 | return TRUE; |
252b5132 RH |
1095 | } |
1096 | ||
1097 | /* This is called when BFD has discovered a constructor. This is only | |
1098 | called for some object file formats--those which do not handle | |
1099 | constructors in some more clever fashion. This is similar to | |
1100 | adding an element to a set, but less general. */ | |
1101 | ||
b34976b6 | 1102 | static bfd_boolean |
1579bae1 AM |
1103 | constructor_callback (struct bfd_link_info *info, |
1104 | bfd_boolean constructor, | |
1105 | const char *name, | |
1106 | bfd *abfd, | |
1107 | asection *section, | |
1108 | bfd_vma value) | |
252b5132 RH |
1109 | { |
1110 | char *s; | |
1111 | struct bfd_link_hash_entry *h; | |
1112 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1113 | ||
1114 | if (config.warn_constructors) | |
1115 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1116 | ||
1117 | if (! config.build_constructors) | |
b34976b6 | 1118 | return TRUE; |
252b5132 RH |
1119 | |
1120 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1121 | useful error message. */ | |
1122 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL | |
1049f94e | 1123 | && (link_info.relocatable |
252b5132 RH |
1124 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1125 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1126 | ||
1127 | s = set_name; | |
1128 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1129 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1130 | if (constructor) | |
1131 | strcpy (s, "__CTOR_LIST__"); | |
1132 | else | |
1133 | strcpy (s, "__DTOR_LIST__"); | |
1134 | ||
b34976b6 | 1135 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1136 | if (h == (struct bfd_link_hash_entry *) NULL) |
1137 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1138 | if (h->type == bfd_link_hash_new) | |
1139 | { | |
1140 | h->type = bfd_link_hash_undefined; | |
1141 | h->u.undef.abfd = abfd; | |
1142 | /* We don't call bfd_link_add_undef to add this to the list of | |
1143 | undefined symbols because we are going to define it | |
1144 | ourselves. */ | |
1145 | } | |
1146 | ||
1147 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1148 | return TRUE; |
252b5132 RH |
1149 | } |
1150 | ||
1151 | /* A structure used by warning_callback to pass information through | |
1152 | bfd_map_over_sections. */ | |
1153 | ||
0125cdf2 NC |
1154 | struct warning_callback_info |
1155 | { | |
b34976b6 | 1156 | bfd_boolean found; |
252b5132 RH |
1157 | const char *warning; |
1158 | const char *symbol; | |
1159 | asymbol **asymbols; | |
1160 | }; | |
1161 | ||
1162 | /* This is called when there is a reference to a warning symbol. */ | |
1163 | ||
b34976b6 | 1164 | static bfd_boolean |
1579bae1 AM |
1165 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1166 | const char *warning, | |
1167 | const char *symbol, | |
1168 | bfd *abfd, | |
1169 | asection *section, | |
1170 | bfd_vma address) | |
252b5132 RH |
1171 | { |
1172 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1173 | have a cleaner interface, but what? */ | |
1174 | if (! config.warn_multiple_gp | |
1175 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1176 | return TRUE; |
252b5132 RH |
1177 | |
1178 | if (section != NULL) | |
1179 | einfo ("%C: %s\n", abfd, section, address, warning); | |
1180 | else if (abfd == NULL) | |
1181 | einfo ("%P: %s\n", warning); | |
1182 | else if (symbol == NULL) | |
1183 | einfo ("%B: %s\n", abfd, warning); | |
1184 | else | |
1185 | { | |
1186 | lang_input_statement_type *entry; | |
1187 | asymbol **asymbols; | |
1188 | struct warning_callback_info info; | |
1189 | ||
1190 | /* Look through the relocs to see if we can find a plausible | |
1191 | address. */ | |
252b5132 RH |
1192 | entry = (lang_input_statement_type *) abfd->usrdata; |
1193 | if (entry != NULL && entry->asymbols != NULL) | |
1194 | asymbols = entry->asymbols; | |
1195 | else | |
1196 | { | |
1197 | long symsize; | |
1198 | long symbol_count; | |
1199 | ||
1200 | symsize = bfd_get_symtab_upper_bound (abfd); | |
1201 | if (symsize < 0) | |
1202 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1579bae1 | 1203 | asymbols = xmalloc (symsize); |
252b5132 RH |
1204 | symbol_count = bfd_canonicalize_symtab (abfd, asymbols); |
1205 | if (symbol_count < 0) | |
1206 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1207 | if (entry != NULL) | |
1208 | { | |
1209 | entry->asymbols = asymbols; | |
1210 | entry->symbol_count = symbol_count; | |
1211 | } | |
1212 | } | |
1213 | ||
b34976b6 | 1214 | info.found = FALSE; |
252b5132 RH |
1215 | info.warning = warning; |
1216 | info.symbol = symbol; | |
1217 | info.asymbols = asymbols; | |
1579bae1 | 1218 | bfd_map_over_sections (abfd, warning_find_reloc, &info); |
252b5132 RH |
1219 | |
1220 | if (! info.found) | |
1221 | einfo ("%B: %s\n", abfd, warning); | |
1222 | ||
1223 | if (entry == NULL) | |
1224 | free (asymbols); | |
1225 | } | |
1226 | ||
b34976b6 | 1227 | return TRUE; |
252b5132 RH |
1228 | } |
1229 | ||
1230 | /* This is called by warning_callback for each section. It checks the | |
1231 | relocs of the section to see if it can find a reference to the | |
1232 | symbol which triggered the warning. If it can, it uses the reloc | |
1233 | to give an error message with a file and line number. */ | |
1234 | ||
1235 | static void | |
1579bae1 | 1236 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1237 | { |
1579bae1 | 1238 | struct warning_callback_info *info = iarg; |
252b5132 RH |
1239 | long relsize; |
1240 | arelent **relpp; | |
1241 | long relcount; | |
1242 | arelent **p, **pend; | |
1243 | ||
1244 | if (info->found) | |
1245 | return; | |
1246 | ||
1247 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1248 | if (relsize < 0) | |
1249 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1250 | if (relsize == 0) | |
1251 | return; | |
1252 | ||
1579bae1 | 1253 | relpp = xmalloc (relsize); |
252b5132 RH |
1254 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1255 | if (relcount < 0) | |
1256 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1257 | ||
1258 | p = relpp; | |
1259 | pend = p + relcount; | |
1260 | for (; p < pend && *p != NULL; p++) | |
1261 | { | |
1262 | arelent *q = *p; | |
1263 | ||
1264 | if (q->sym_ptr_ptr != NULL | |
1265 | && *q->sym_ptr_ptr != NULL | |
1266 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1267 | { | |
1268 | /* We found a reloc for the symbol we are looking for. */ | |
1269 | einfo ("%C: %s\n", abfd, sec, q->address, info->warning); | |
b34976b6 | 1270 | info->found = TRUE; |
252b5132 RH |
1271 | break; |
1272 | } | |
1273 | } | |
1274 | ||
1275 | free (relpp); | |
1276 | } | |
1277 | ||
1278 | /* This is called when an undefined symbol is found. */ | |
1279 | ||
b34976b6 | 1280 | static bfd_boolean |
1579bae1 AM |
1281 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1282 | const char *name, | |
1283 | bfd *abfd, | |
1284 | asection *section, | |
1285 | bfd_vma address, | |
0b28295d | 1286 | bfd_boolean error) |
252b5132 RH |
1287 | { |
1288 | static char *error_name; | |
1289 | static unsigned int error_count; | |
1290 | ||
1291 | #define MAX_ERRORS_IN_A_ROW 5 | |
1292 | ||
1293 | if (config.warn_once) | |
1294 | { | |
1295 | static struct bfd_hash_table *hash; | |
1296 | ||
1297 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1298 | if (hash == NULL) |
1299 | { | |
1579bae1 | 1300 | hash = xmalloc (sizeof (struct bfd_hash_table)); |
252b5132 RH |
1301 | if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) |
1302 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); | |
1303 | } | |
1304 | ||
b34976b6 AM |
1305 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1306 | return TRUE; | |
252b5132 | 1307 | |
b34976b6 | 1308 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1309 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1310 | } | |
1311 | ||
1312 | /* We never print more than a reasonable number of errors in a row | |
1313 | for a single symbol. */ | |
1579bae1 | 1314 | if (error_name != NULL |
252b5132 RH |
1315 | && strcmp (name, error_name) == 0) |
1316 | ++error_count; | |
1317 | else | |
1318 | { | |
1319 | error_count = 0; | |
1579bae1 | 1320 | if (error_name != NULL) |
252b5132 | 1321 | free (error_name); |
d1b2b2dc | 1322 | error_name = xstrdup (name); |
252b5132 RH |
1323 | } |
1324 | ||
1325 | if (section != NULL) | |
1326 | { | |
1327 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1328 | { |
0b28295d ILT |
1329 | if (error) |
1330 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1331 | abfd, section, address, name); | |
1332 | else | |
1333 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1334 | abfd, section, address, name); | |
b6f29aaa | 1335 | } |
252b5132 | 1336 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1337 | { |
1338 | if (error) | |
1339 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1340 | abfd, section, address, name); | |
1341 | else | |
1342 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1343 | abfd, section, address, name); | |
1344 | } | |
1345 | else if (error) | |
1346 | einfo ("%X"); | |
252b5132 RH |
1347 | } |
1348 | else | |
1349 | { | |
1350 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1351 | { |
0b28295d ILT |
1352 | if (error) |
1353 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1354 | abfd, name); | |
1355 | else | |
1356 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1357 | abfd, name); | |
b6f29aaa | 1358 | } |
252b5132 | 1359 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1360 | { |
1361 | if (error) | |
1362 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1363 | abfd, name); | |
1364 | else | |
1365 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1366 | abfd, name); | |
1367 | } | |
1368 | else if (error) | |
1369 | einfo ("%X"); | |
252b5132 RH |
1370 | } |
1371 | ||
b34976b6 | 1372 | return TRUE; |
252b5132 RH |
1373 | } |
1374 | ||
8aae64e6 AO |
1375 | /* Counter to limit the number of relocation overflow error messages |
1376 | to print. Errors are printed as it is decremented. When it's | |
1377 | called and the counter is zero, a final message is printed | |
1378 | indicating more relocations were omitted. When it gets to -1, no | |
1379 | such errors are printed. If it's initially set to a value less | |
1380 | than -1, all such errors will be printed (--verbose does this). */ | |
1381 | ||
1382 | int overflow_cutoff_limit = 10; | |
1383 | ||
252b5132 RH |
1384 | /* This is called when a reloc overflows. */ |
1385 | ||
b34976b6 | 1386 | static bfd_boolean |
1579bae1 AM |
1387 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1388 | const char *name, | |
1389 | const char *reloc_name, | |
1390 | bfd_vma addend, | |
1391 | bfd *abfd, | |
1392 | asection *section, | |
1393 | bfd_vma address) | |
252b5132 | 1394 | { |
8aae64e6 AO |
1395 | if (overflow_cutoff_limit == -1) |
1396 | return TRUE; | |
1397 | ||
1579bae1 | 1398 | if (abfd == NULL) |
252b5132 RH |
1399 | einfo (_("%P%X: generated")); |
1400 | else | |
1401 | einfo ("%X%C:", abfd, section, address); | |
8aae64e6 AO |
1402 | |
1403 | if (overflow_cutoff_limit >= 0 | |
1404 | && overflow_cutoff_limit-- == 0) | |
1405 | { | |
1406 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1407 | return TRUE; | |
1408 | } | |
1409 | ||
252b5132 RH |
1410 | einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name); |
1411 | if (addend != 0) | |
1412 | einfo ("+%v", addend); | |
1413 | einfo ("\n"); | |
b34976b6 | 1414 | return TRUE; |
252b5132 RH |
1415 | } |
1416 | ||
1417 | /* This is called when a dangerous relocation is made. */ | |
1418 | ||
b34976b6 | 1419 | static bfd_boolean |
1579bae1 AM |
1420 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1421 | const char *message, | |
1422 | bfd *abfd, | |
1423 | asection *section, | |
1424 | bfd_vma address) | |
252b5132 | 1425 | { |
1579bae1 | 1426 | if (abfd == NULL) |
252b5132 RH |
1427 | einfo (_("%P%X: generated")); |
1428 | else | |
1429 | einfo ("%X%C:", abfd, section, address); | |
1430 | einfo (_("dangerous relocation: %s\n"), message); | |
b34976b6 | 1431 | return TRUE; |
252b5132 RH |
1432 | } |
1433 | ||
1434 | /* This is called when a reloc is being generated attached to a symbol | |
1435 | that is not being output. */ | |
1436 | ||
b34976b6 | 1437 | static bfd_boolean |
1579bae1 AM |
1438 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1439 | const char *name, | |
1440 | bfd *abfd, | |
1441 | asection *section, | |
1442 | bfd_vma address) | |
252b5132 | 1443 | { |
1579bae1 | 1444 | if (abfd == NULL) |
252b5132 RH |
1445 | einfo (_("%P%X: generated")); |
1446 | else | |
1447 | einfo ("%X%C:", abfd, section, address); | |
1448 | einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name); | |
b34976b6 | 1449 | return TRUE; |
252b5132 RH |
1450 | } |
1451 | ||
1452 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1453 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1454 | using the -y option. */ | |
1455 | ||
b34976b6 | 1456 | static bfd_boolean |
1579bae1 AM |
1457 | notice (struct bfd_link_info *info, |
1458 | const char *name, | |
1459 | bfd *abfd, | |
1460 | asection *section, | |
1461 | bfd_vma value) | |
252b5132 RH |
1462 | { |
1463 | if (! info->notice_all | |
1464 | || (info->notice_hash != NULL | |
b34976b6 | 1465 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) |
252b5132 RH |
1466 | { |
1467 | if (bfd_is_und_section (section)) | |
1468 | einfo ("%B: reference to %s\n", abfd, name); | |
1469 | else | |
1470 | einfo ("%B: definition of %s\n", abfd, name); | |
1471 | } | |
1472 | ||
1473 | if (command_line.cref || nocrossref_list != NULL) | |
1474 | add_cref (name, abfd, section, value); | |
1475 | ||
b34976b6 | 1476 | return TRUE; |
252b5132 | 1477 | } |