Commit | Line | Data |
---|---|---|
8594f568 | 1 | /* Main program of GNU linker. |
45408cd7 | 2 | Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. |
ce4d59e2 | 3 | Written by Steve Chamberlain steve@cygnus.com |
e47bfa63 | 4 | |
2fa0b342 DHW |
5 | This file is part of GLD, the Gnu Linker. |
6 | ||
7 | GLD is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ce4d59e2 | 9 | the Free Software Foundation; either version 2, or (at your option) |
2fa0b342 DHW |
10 | any later version. |
11 | ||
12 | GLD is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
2ed9fe47 ILT |
18 | along with GLD; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
2fa0b342 | 21 | |
2fa0b342 | 22 | #include "bfd.h" |
f177a611 | 23 | #include "sysdep.h" |
b9395be3 | 24 | #include <stdio.h> |
7d6439d9 | 25 | #include <ctype.h> |
d4e5e3c3 | 26 | #include "libiberty.h" |
a735edad | 27 | #include "progress.h" |
b9395be3 | 28 | #include "bfdlink.h" |
2fa0b342 | 29 | |
2fa0b342 DHW |
30 | #include "ld.h" |
31 | #include "ldmain.h" | |
32 | #include "ldmisc.h" | |
33 | #include "ldwrite.h" | |
34 | #include "ldgram.h" | |
fcf276c4 | 35 | #include "ldexp.h" |
2fa0b342 | 36 | #include "ldlang.h" |
8c514453 | 37 | #include "ldemul.h" |
2fa0b342 DHW |
38 | #include "ldlex.h" |
39 | #include "ldfile.h" | |
c611e285 | 40 | #include "ldctor.h" |
9d1fe8a4 | 41 | |
922018a1 | 42 | /* Somewhere above, sys/stat.h got included . . . . */ |
d723cd17 DM |
43 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
44 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
45 | #endif | |
46 | ||
47 | #include <string.h> | |
48 | ||
45408cd7 ILT |
49 | #ifdef HAVE_SBRK |
50 | #ifdef NEED_DECLARATION_SBRK | |
51 | extern PTR sbrk (); | |
52 | #endif | |
53 | #endif | |
54 | ||
fcf276c4 ILT |
55 | static char *get_emulation PARAMS ((int, char **)); |
56 | static void set_scripts_dir PARAMS ((void)); | |
e47bfa63 | 57 | |
2fa0b342 DHW |
58 | /* EXPORTS */ |
59 | ||
60 | char *default_target; | |
fcf276c4 | 61 | const char *output_filename = "a.out"; |
e47bfa63 | 62 | |
2fa0b342 DHW |
63 | /* Name this program was invoked by. */ |
64 | char *program_name; | |
65 | ||
66 | /* The file that we're creating */ | |
b6316534 | 67 | bfd *output_bfd = 0; |
2fa0b342 | 68 | |
173a0c3d DM |
69 | /* Set by -G argument, for MIPS ECOFF target. */ |
70 | int g_switch_value = 8; | |
71 | ||
2fa0b342 DHW |
72 | /* Nonzero means print names of input files as processed. */ |
73 | boolean trace_files; | |
74 | ||
bbd2521f DM |
75 | /* Nonzero means same, but note open failures, too. */ |
76 | boolean trace_file_tries; | |
77 | ||
7b40f2b1 DM |
78 | /* Nonzero means version number was printed, so exit successfully |
79 | instead of complaining if no input files are given. */ | |
80 | boolean version_printed; | |
81 | ||
f2f55b16 ILT |
82 | /* Nonzero means link in every member of an archive. */ |
83 | boolean whole_archive; | |
84 | ||
2fa0b342 | 85 | args_type command_line; |
173a0c3d | 86 | |
2fa0b342 | 87 | ld_config_type config; |
9f629407 ILT |
88 | |
89 | static boolean check_for_scripts_dir PARAMS ((char *dir)); | |
b9395be3 ILT |
90 | static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, |
91 | const char *)); | |
92 | static boolean multiple_definition PARAMS ((struct bfd_link_info *, | |
93 | const char *, | |
94 | bfd *, asection *, bfd_vma, | |
95 | bfd *, asection *, bfd_vma)); | |
96 | static boolean multiple_common PARAMS ((struct bfd_link_info *, | |
97 | const char *, bfd *, | |
98 | enum bfd_link_hash_type, bfd_vma, | |
99 | bfd *, enum bfd_link_hash_type, | |
100 | bfd_vma)); | |
101 | static boolean add_to_set PARAMS ((struct bfd_link_info *, | |
102 | struct bfd_link_hash_entry *, | |
2a9fa50c | 103 | bfd_reloc_code_real_type, |
b9395be3 ILT |
104 | bfd *, asection *, bfd_vma)); |
105 | static boolean constructor_callback PARAMS ((struct bfd_link_info *, | |
106 | boolean constructor, | |
b9395be3 ILT |
107 | const char *name, |
108 | bfd *, asection *, bfd_vma)); | |
109 | static boolean warning_callback PARAMS ((struct bfd_link_info *, | |
7d6439d9 ILT |
110 | const char *, const char *, bfd *, |
111 | asection *, bfd_vma)); | |
112 | static void warning_find_reloc PARAMS ((bfd *, asection *, PTR)); | |
b9395be3 ILT |
113 | static boolean undefined_symbol PARAMS ((struct bfd_link_info *, |
114 | const char *, bfd *, | |
115 | asection *, bfd_vma)); | |
5dad4c97 ILT |
116 | static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, |
117 | const char *, bfd_vma, | |
118 | bfd *, asection *, bfd_vma)); | |
b9395be3 ILT |
119 | static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, |
120 | bfd *, asection *, bfd_vma)); | |
121 | static boolean unattached_reloc PARAMS ((struct bfd_link_info *, | |
122 | const char *, bfd *, asection *, | |
123 | bfd_vma)); | |
cd09553a ILT |
124 | static boolean notice PARAMS ((struct bfd_link_info *, const char *, |
125 | bfd *, asection *, bfd_vma)); | |
b9395be3 ILT |
126 | |
127 | static struct bfd_link_callbacks link_callbacks = | |
128 | { | |
129 | add_archive_element, | |
130 | multiple_definition, | |
131 | multiple_common, | |
132 | add_to_set, | |
133 | constructor_callback, | |
134 | warning_callback, | |
135 | undefined_symbol, | |
136 | reloc_overflow, | |
137 | reloc_dangerous, | |
138 | unattached_reloc, | |
cd09553a | 139 | notice |
b9395be3 ILT |
140 | }; |
141 | ||
142 | struct bfd_link_info link_info; | |
173a0c3d | 143 | \f |
0b2f8d2e DM |
144 | static void |
145 | remove_output () | |
146 | { | |
147 | if (output_filename) | |
148 | { | |
149 | if (output_bfd && output_bfd->iostream) | |
150 | fclose((FILE *)(output_bfd->iostream)); | |
151 | if (delete_output_file_on_failure) | |
152 | unlink (output_filename); | |
153 | } | |
154 | } | |
155 | ||
9f629407 | 156 | int |
2fa0b342 | 157 | main (argc, argv) |
2fa0b342 | 158 | int argc; |
9f629407 | 159 | char **argv; |
2fa0b342 DHW |
160 | { |
161 | char *emulation; | |
8594f568 | 162 | long start_time = get_run_time (); |
e47bfa63 | 163 | |
2fa0b342 | 164 | program_name = argv[0]; |
5bcb7f28 | 165 | xmalloc_set_program_name (program_name); |
99fe4553 | 166 | |
a735edad ILT |
167 | START_PROGRESS (program_name, 0); |
168 | ||
e47bfa63 | 169 | bfd_init (); |
bfbdc80f | 170 | |
28113e82 ILT |
171 | bfd_set_error_program_name (program_name); |
172 | ||
5bcb7f28 | 173 | xatexit (remove_output); |
0b2f8d2e | 174 | |
d7339c87 ILT |
175 | /* Set the default BFD target based on the configured target. Doing |
176 | this permits the linker to be configured for a particular target, | |
177 | and linked against a shared BFD library which was configured for | |
178 | a different target. The macro TARGET is defined by Makefile. */ | |
179 | if (! bfd_set_default_target (TARGET)) | |
180 | { | |
181 | einfo ("%X%P: can't set BFD default target to `%s': %E\n", TARGET); | |
182 | xexit (1); | |
183 | } | |
184 | ||
2fa0b342 | 185 | /* Initialize the data about options. */ |
7b40f2b1 | 186 | trace_files = trace_file_tries = version_printed = false; |
f2f55b16 | 187 | whole_archive = false; |
b9395be3 | 188 | config.build_constructors = true; |
2a9fa50c | 189 | config.dynamic_link = false; |
2fa0b342 | 190 | command_line.force_common_definition = false; |
7fb9ca5f | 191 | command_line.interpreter = NULL; |
cc23cc69 | 192 | command_line.rpath = NULL; |
2fa0b342 | 193 | |
b9395be3 ILT |
194 | link_info.callbacks = &link_callbacks; |
195 | link_info.relocateable = false; | |
64887de2 | 196 | link_info.shared = false; |
4551e108 | 197 | link_info.symbolic = false; |
7d6439d9 | 198 | link_info.static_link = false; |
6799c638 | 199 | link_info.traditional_format = false; |
b9395be3 ILT |
200 | link_info.strip = strip_none; |
201 | link_info.discard = discard_none; | |
b9395be3 ILT |
202 | link_info.keep_memory = true; |
203 | link_info.input_bfds = NULL; | |
204 | link_info.create_object_symbols_section = NULL; | |
205 | link_info.hash = NULL; | |
206 | link_info.keep_hash = NULL; | |
cd09553a | 207 | link_info.notice_all = false; |
b9395be3 | 208 | link_info.notice_hash = NULL; |
e3d73386 | 209 | link_info.wrap_hash = NULL; |
7d6439d9 | 210 | |
e47bfa63 | 211 | ldfile_add_arch (""); |
a72f4e5f | 212 | |
2fa0b342 DHW |
213 | config.make_executable = true; |
214 | force_make_executable = false; | |
ce4d59e2 SC |
215 | config.magic_demand_paged = true; |
216 | config.text_read_only = true; | |
2fa0b342 | 217 | config.make_executable = true; |
1418c83b | 218 | |
d723cd17 | 219 | emulation = get_emulation (argc, argv); |
e47bfa63 SC |
220 | ldemul_choose_mode (emulation); |
221 | default_target = ldemul_choose_target (); | |
222 | lang_init (); | |
223 | ldemul_before_parse (); | |
2fa0b342 | 224 | lang_has_input_file = false; |
e47bfa63 | 225 | parse_args (argc, argv); |
f3739bc3 | 226 | |
7d6439d9 ILT |
227 | ldemul_set_symbols (); |
228 | ||
2a9fa50c ILT |
229 | if (link_info.relocateable) |
230 | { | |
231 | if (command_line.relax) | |
232 | einfo ("%P%F: -relax and -r may not be used together\n"); | |
64887de2 ILT |
233 | if (link_info.shared) |
234 | einfo ("%P%F: -r and -shared may not be used together\n"); | |
2a9fa50c ILT |
235 | } |
236 | ||
8ed88239 ILT |
237 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
238 | don't see how else this can be handled, since in this case we | |
239 | must preserve all externally visible symbols. */ | |
240 | if (link_info.relocateable && link_info.strip == strip_all) | |
241 | { | |
242 | link_info.strip = strip_debugger; | |
243 | if (link_info.discard == discard_none) | |
244 | link_info.discard = discard_all; | |
245 | } | |
246 | ||
973e421e ILT |
247 | /* This essentially adds another -L directory so this must be done after |
248 | the -L's in argv have been processed. */ | |
249 | set_scripts_dir (); | |
250 | ||
bbd2521f DM |
251 | if (had_script == false) |
252 | { | |
253 | /* Read the emulation's appropriate default script. */ | |
2a28d8b0 DM |
254 | int isfile; |
255 | char *s = ldemul_get_script (&isfile); | |
256 | ||
257 | if (isfile) | |
d4e5e3c3 | 258 | ldfile_open_command_file (s); |
2a28d8b0 | 259 | else |
22c41f00 ILT |
260 | { |
261 | if (trace_file_tries) | |
262 | { | |
263 | info_msg ("using internal linker script:\n"); | |
264 | info_msg ("==================================================\n"); | |
265 | info_msg (s); | |
266 | info_msg ("\n==================================================\n"); | |
267 | } | |
7d6439d9 | 268 | lex_string = s; |
22c41f00 ILT |
269 | lex_redirect (s); |
270 | } | |
d4e5e3c3 DM |
271 | parser_input = input_script; |
272 | yyparse (); | |
7d6439d9 | 273 | lex_string = NULL; |
bbd2521f DM |
274 | } |
275 | ||
e47bfa63 | 276 | lang_final (); |
9d1fe8a4 | 277 | |
e47bfa63 SC |
278 | if (lang_has_input_file == false) |
279 | { | |
7b40f2b1 | 280 | if (version_printed) |
0b2f8d2e | 281 | xexit (0); |
973e421e | 282 | einfo ("%P%F: no input files\n"); |
870f54b2 | 283 | } |
2fa0b342 | 284 | |
bbd2521f DM |
285 | if (trace_files) |
286 | { | |
973e421e | 287 | info_msg ("%P: mode %s\n", emulation); |
bbd2521f DM |
288 | } |
289 | ||
e47bfa63 | 290 | ldemul_after_parse (); |
870f54b2 | 291 | |
9d1fe8a4 | 292 | |
e47bfa63 | 293 | if (config.map_filename) |
870f54b2 | 294 | { |
e47bfa63 | 295 | if (strcmp (config.map_filename, "-") == 0) |
2e2bf962 | 296 | { |
e47bfa63 | 297 | config.map_file = stdout; |
2e2bf962 | 298 | } |
e47bfa63 SC |
299 | else |
300 | { | |
301 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
302 | if (config.map_file == (FILE *) NULL) | |
303 | { | |
de71eb77 | 304 | bfd_set_error (bfd_error_system_call); |
bbd2521f | 305 | einfo ("%P%F: cannot open map file %s: %E\n", |
e47bfa63 SC |
306 | config.map_filename); |
307 | } | |
308 | } | |
309 | } | |
870f54b2 | 310 | |
2e2bf962 | 311 | |
e47bfa63 | 312 | lang_process (); |
2fa0b342 | 313 | |
2fa0b342 DHW |
314 | /* Print error messages for any missing symbols, for any warning |
315 | symbols, and possibly multiple definitions */ | |
316 | ||
2fa0b342 | 317 | |
e47bfa63 SC |
318 | if (config.text_read_only) |
319 | { | |
320 | /* Look for a text section and mark the readonly attribute in it */ | |
321 | asection *found = bfd_get_section_by_name (output_bfd, ".text"); | |
322 | ||
323 | if (found != (asection *) NULL) | |
324 | { | |
325 | found->flags |= SEC_READONLY; | |
326 | } | |
3e4c643d | 327 | } |
2fa0b342 | 328 | |
a735edad | 329 | if (link_info.relocateable) |
f3739bc3 | 330 | output_bfd->flags &= ~EXEC_P; |
a72f4e5f | 331 | else |
f3739bc3 | 332 | output_bfd->flags |= EXEC_P; |
b257477f | 333 | |
f3739bc3 | 334 | ldwrite (); |
b257477f | 335 | |
0cacbcbe ILT |
336 | if (config.map_file != NULL) |
337 | lang_map (); | |
cd09553a ILT |
338 | if (command_line.cref) |
339 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
582dd77f ILT |
340 | if (nocrossref_list != NULL) |
341 | check_nocrossrefs (); | |
0cacbcbe | 342 | |
f3739bc3 SC |
343 | /* Even if we're producing relocateable output, some non-fatal errors should |
344 | be reported in the exit status. (What non-fatal errors, if any, do we | |
345 | want to ignore for relocateable output?) */ | |
a72f4e5f | 346 | |
f3739bc3 SC |
347 | if (config.make_executable == false && force_make_executable == false) |
348 | { | |
349 | if (trace_files == true) | |
e47bfa63 | 350 | { |
973e421e | 351 | einfo ("%P: link errors found, deleting executable `%s'\n", |
f3739bc3 | 352 | output_filename); |
e47bfa63 | 353 | } |
a72f4e5f | 354 | |
cd09553a | 355 | /* The file will be removed by remove_output. */ |
a72f4e5f | 356 | |
0b2f8d2e | 357 | xexit (1); |
f3739bc3 SC |
358 | } |
359 | else | |
360 | { | |
2a9fa50c ILT |
361 | if (! bfd_close (output_bfd)) |
362 | einfo ("%F%B: final close failed: %E\n", output_bfd); | |
cd09553a ILT |
363 | |
364 | /* If the --force-exe-suffix is enabled, and we're making an | |
365 | executable file and it doesn't end in .exe, copy it to one which does. */ | |
366 | ||
367 | if (! link_info.relocateable && command_line.force_exe_suffix) | |
368 | { | |
369 | int len = strlen (output_filename); | |
370 | if (len < 4 | |
371 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 | |
372 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
373 | { | |
374 | FILE *src; | |
375 | FILE *dst; | |
376 | const int bsize = 4096; | |
377 | char *buf = xmalloc (bsize); | |
378 | int l; | |
379 | char *dst_name = xmalloc (len + 5); | |
380 | strcpy (dst_name, output_filename); | |
381 | strcat (dst_name, ".exe"); | |
382 | src = fopen (output_filename, FOPEN_RB); | |
383 | dst = fopen (dst_name, FOPEN_WB); | |
384 | ||
385 | if (!src) | |
386 | einfo ("%X%P: unable to open for source of copy `%s'\n", output_filename); | |
387 | if (!dst) | |
388 | einfo ("%X%P: unable to open for destination of copy `%s'\n", dst_name); | |
389 | while ((l = fread (buf, 1, bsize, src)) > 0) | |
390 | { | |
391 | int done = fwrite (buf, 1, l, dst); | |
392 | if (done != l) | |
393 | { | |
394 | einfo ("%P: Error writing file `%s'\n", dst_name); | |
395 | } | |
396 | } | |
397 | fclose (src); | |
398 | if (!fclose (dst)) | |
399 | { | |
400 | einfo ("%P: Error closing file `%s'\n", dst_name); | |
401 | } | |
402 | free (dst_name); | |
403 | free (buf); | |
404 | } | |
405 | } | |
f3739bc3 | 406 | } |
2fa0b342 | 407 | |
a735edad ILT |
408 | END_PROGRESS (program_name); |
409 | ||
b9395be3 ILT |
410 | if (config.stats) |
411 | { | |
412 | extern char **environ; | |
eac6290c | 413 | #ifdef HAVE_SBRK |
b9395be3 | 414 | char *lim = (char *) sbrk (0); |
de71eb77 | 415 | #endif |
8594f568 | 416 | long run_time = get_run_time () - start_time; |
b9395be3 | 417 | |
5bcb7f28 | 418 | fprintf (stderr, "%s: total time in link: %ld.%06ld\n", |
8594f568 | 419 | program_name, run_time / 1000000, run_time % 1000000); |
eac6290c | 420 | #ifdef HAVE_SBRK |
b9395be3 ILT |
421 | fprintf (stderr, "%s: data size %ld\n", program_name, |
422 | (long) (lim - (char *) &environ)); | |
de71eb77 | 423 | #endif |
b9395be3 ILT |
424 | } |
425 | ||
52a8ebfe DM |
426 | /* Prevent remove_output from doing anything, after a successful link. */ |
427 | output_filename = NULL; | |
428 | ||
0b2f8d2e | 429 | xexit (0); |
9f629407 | 430 | return 0; |
d723cd17 DM |
431 | } |
432 | ||
433 | /* We need to find any explicitly given emulation in order to initialize the | |
434 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
435 | ||
436 | static char * | |
437 | get_emulation (argc, argv) | |
438 | int argc; | |
439 | char **argv; | |
440 | { | |
441 | char *emulation; | |
442 | int i; | |
443 | ||
45408cd7 | 444 | emulation = getenv (EMULATION_ENVIRON); |
d723cd17 DM |
445 | if (emulation == NULL) |
446 | emulation = DEFAULT_EMULATION; | |
d723cd17 DM |
447 | |
448 | for (i = 1; i < argc; i++) | |
449 | { | |
450 | if (!strncmp (argv[i], "-m", 2)) | |
451 | { | |
452 | if (argv[i][2] == '\0') | |
453 | { | |
454 | /* -m EMUL */ | |
455 | if (i < argc - 1) | |
456 | { | |
457 | emulation = argv[i + 1]; | |
458 | i++; | |
459 | } | |
460 | else | |
461 | { | |
973e421e | 462 | einfo("%P%F: missing argument to -m\n"); |
d723cd17 DM |
463 | } |
464 | } | |
973e421e ILT |
465 | else if (strcmp (argv[i], "-mips1") == 0 |
466 | || strcmp (argv[i], "-mips2") == 0 | |
45408cd7 ILT |
467 | || strcmp (argv[i], "-mips3") == 0 |
468 | || strcmp (argv[i], "-mips4") == 0) | |
973e421e ILT |
469 | { |
470 | /* FIXME: The arguments -mips1, -mips2 and -mips3 are | |
471 | passed to the linker by some MIPS compilers. They | |
472 | generally tell the linker to use a slightly different | |
473 | library path. Perhaps someday these should be | |
474 | implemented as emulations; until then, we just ignore | |
475 | the arguments and hope that nobody ever creates | |
476 | emulations named ips1, ips2 or ips3. */ | |
477 | } | |
cbbf9608 ILT |
478 | else if (strcmp (argv[i], "-m486") == 0) |
479 | { | |
480 | /* FIXME: The argument -m486 is passed to the linker on | |
481 | some Linux systems. Hope that nobody creates an | |
482 | emulation named 486. */ | |
483 | } | |
d723cd17 DM |
484 | else |
485 | { | |
486 | /* -mEMUL */ | |
487 | emulation = &argv[i][2]; | |
488 | } | |
489 | } | |
490 | } | |
491 | ||
492 | return emulation; | |
493 | } | |
494 | ||
495 | /* If directory DIR contains an "ldscripts" subdirectory, | |
496 | add DIR to the library search path and return true, | |
497 | else return false. */ | |
498 | ||
499 | static boolean | |
500 | check_for_scripts_dir (dir) | |
501 | char *dir; | |
502 | { | |
503 | size_t dirlen; | |
504 | char *buf; | |
505 | struct stat s; | |
506 | boolean res; | |
507 | ||
508 | dirlen = strlen (dir); | |
509 | /* sizeof counts the terminating NUL. */ | |
0b2f8d2e | 510 | buf = (char *) xmalloc (dirlen + sizeof("/ldscripts")); |
d723cd17 DM |
511 | sprintf (buf, "%s/ldscripts", dir); |
512 | ||
513 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
f4208462 | 514 | free (buf); |
d723cd17 | 515 | if (res) |
0cd82d00 | 516 | ldfile_add_library_path (dir, false); |
d723cd17 DM |
517 | return res; |
518 | } | |
519 | ||
520 | /* Set the default directory for finding script files. | |
f4208462 DM |
521 | Libraries will be searched for here too, but that's ok. |
522 | We look for the "ldscripts" directory in: | |
523 | ||
f4208462 | 524 | SCRIPTDIR (passed from Makefile) |
bbd2521f DM |
525 | the dir where this program is (for using it from the build tree) |
526 | the dir where this program is/../lib (for installing the tool suite elsewhere) */ | |
d723cd17 DM |
527 | |
528 | static void | |
529 | set_scripts_dir () | |
530 | { | |
f4208462 DM |
531 | char *end, *dir; |
532 | size_t dirlen; | |
533 | ||
d723cd17 | 534 | if (check_for_scripts_dir (SCRIPTDIR)) |
f4208462 | 535 | return; /* We've been installed normally. */ |
d723cd17 DM |
536 | |
537 | /* Look for "ldscripts" in the dir where our binary is. */ | |
538 | end = strrchr (program_name, '/'); | |
7d6439d9 ILT |
539 | |
540 | if (end == NULL) | |
bbd2521f | 541 | { |
7d6439d9 ILT |
542 | /* Don't look for ldscripts in the current directory. There is |
543 | too much potential for confusion. */ | |
544 | return; | |
bbd2521f | 545 | } |
f4208462 | 546 | |
7d6439d9 ILT |
547 | dirlen = end - program_name; |
548 | /* Make a copy of program_name in dir. | |
549 | Leave room for later "/../lib". */ | |
550 | dir = (char *) xmalloc (dirlen + 8); | |
551 | strncpy (dir, program_name, dirlen); | |
552 | dir[dirlen] = '\0'; | |
553 | ||
f4208462 DM |
554 | if (check_for_scripts_dir (dir)) |
555 | return; /* Don't free dir. */ | |
556 | ||
557 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
558 | strcpy (dir + dirlen, "/../lib"); | |
559 | if (check_for_scripts_dir (dir)) | |
560 | return; | |
561 | ||
562 | free (dir); /* Well, we tried. */ | |
d723cd17 | 563 | } |
2fa0b342 | 564 | |
e47bfa63 | 565 | void |
b9395be3 ILT |
566 | add_ysym (name) |
567 | const char *name; | |
2fa0b342 | 568 | { |
b9395be3 ILT |
569 | if (link_info.notice_hash == (struct bfd_hash_table *) NULL) |
570 | { | |
571 | link_info.notice_hash = ((struct bfd_hash_table *) | |
0b2f8d2e | 572 | xmalloc (sizeof (struct bfd_hash_table))); |
b9395be3 ILT |
573 | if (! bfd_hash_table_init_n (link_info.notice_hash, |
574 | bfd_hash_newfunc, | |
575 | 61)) | |
576 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
577 | } | |
578 | ||
579 | if (bfd_hash_lookup (link_info.notice_hash, name, true, true) | |
580 | == (struct bfd_hash_entry *) NULL) | |
581 | einfo ("%P%F: bfd_hash_lookup failed: %E\n"); | |
2fa0b342 | 582 | } |
e47bfa63 | 583 | |
28113e82 ILT |
584 | /* Record a symbol to be wrapped, from the --wrap option. */ |
585 | ||
586 | void | |
587 | add_wrap (name) | |
588 | const char *name; | |
589 | { | |
590 | if (link_info.wrap_hash == NULL) | |
591 | { | |
592 | link_info.wrap_hash = ((struct bfd_hash_table *) | |
593 | xmalloc (sizeof (struct bfd_hash_table))); | |
594 | if (! bfd_hash_table_init_n (link_info.wrap_hash, | |
595 | bfd_hash_newfunc, | |
596 | 61)) | |
597 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
598 | } | |
599 | if (bfd_hash_lookup (link_info.wrap_hash, name, true, true) == NULL) | |
600 | einfo ("%P%F: bfd_hash_lookup failed: %E\n"); | |
601 | } | |
602 | ||
b9395be3 | 603 | /* Handle the -retain-symbols-file option. */ |
2fa0b342 | 604 | |
2fa0b342 | 605 | void |
b9395be3 ILT |
606 | add_keepsyms_file (filename) |
607 | const char *filename; | |
2fa0b342 | 608 | { |
b9395be3 ILT |
609 | FILE *file; |
610 | char *buf; | |
611 | size_t bufsize; | |
612 | int c; | |
2fa0b342 | 613 | |
b9395be3 ILT |
614 | if (link_info.strip == strip_some) |
615 | einfo ("%X%P: error: duplicate retain-symbols-file\n"); | |
3e4c643d | 616 | |
b9395be3 ILT |
617 | file = fopen (filename, "r"); |
618 | if (file == (FILE *) NULL) | |
e47bfa63 | 619 | { |
5bcb7f28 | 620 | bfd_set_error (bfd_error_system_call); |
7d6439d9 | 621 | einfo ("%X%P: %s: %E\n", filename); |
b9395be3 | 622 | return; |
be1627d3 | 623 | } |
be1627d3 | 624 | |
b9395be3 | 625 | link_info.keep_hash = ((struct bfd_hash_table *) |
0b2f8d2e | 626 | xmalloc (sizeof (struct bfd_hash_table))); |
b9395be3 ILT |
627 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) |
628 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
2fa0b342 | 629 | |
b9395be3 | 630 | bufsize = 100; |
0b2f8d2e | 631 | buf = (char *) xmalloc (bufsize); |
c611e285 | 632 | |
b9395be3 ILT |
633 | c = getc (file); |
634 | while (c != EOF) | |
29f33467 | 635 | { |
b9395be3 ILT |
636 | while (isspace (c)) |
637 | c = getc (file); | |
e47bfa63 | 638 | |
b9395be3 | 639 | if (c != EOF) |
29f33467 | 640 | { |
b9395be3 | 641 | size_t len = 0; |
8a045e50 | 642 | |
b9395be3 | 643 | while (! isspace (c) && c != EOF) |
29f33467 | 644 | { |
b9395be3 ILT |
645 | buf[len] = c; |
646 | ++len; | |
647 | if (len >= bufsize) | |
29f33467 | 648 | { |
b9395be3 | 649 | bufsize *= 2; |
0b2f8d2e | 650 | buf = xrealloc (buf, bufsize); |
29f33467 | 651 | } |
b9395be3 | 652 | c = getc (file); |
29f33467 | 653 | } |
81016051 | 654 | |
b9395be3 ILT |
655 | buf[len] = '\0'; |
656 | ||
657 | if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) | |
658 | == (struct bfd_hash_entry *) NULL) | |
7d6439d9 | 659 | einfo ("%P%F: bfd_hash_lookup for insertion failed: %E\n"); |
29f33467 | 660 | } |
e47bfa63 | 661 | } |
2fa0b342 | 662 | |
b9395be3 ILT |
663 | if (link_info.strip != strip_none) |
664 | einfo ("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"); | |
8a045e50 | 665 | |
b9395be3 ILT |
666 | link_info.strip = strip_some; |
667 | } | |
668 | \f | |
669 | /* Callbacks from the BFD linker routines. */ | |
2fa0b342 | 670 | |
b9395be3 ILT |
671 | /* This is called when BFD has decided to include an archive member in |
672 | a link. */ | |
2fa0b342 | 673 | |
b9395be3 ILT |
674 | /*ARGSUSED*/ |
675 | static boolean | |
676 | add_archive_element (info, abfd, name) | |
677 | struct bfd_link_info *info; | |
678 | bfd *abfd; | |
679 | const char *name; | |
2fa0b342 | 680 | { |
b9395be3 ILT |
681 | lang_input_statement_type *input; |
682 | ||
683 | input = ((lang_input_statement_type *) | |
7d6439d9 | 684 | xmalloc (sizeof (lang_input_statement_type))); |
b9395be3 ILT |
685 | input->filename = abfd->filename; |
686 | input->local_sym_name = abfd->filename; | |
687 | input->the_bfd = abfd; | |
688 | input->asymbols = NULL; | |
b9395be3 ILT |
689 | input->next = NULL; |
690 | input->just_syms_flag = false; | |
691 | input->loaded = false; | |
210c52ac | 692 | input->search_dirs_flag = false; |
b9395be3 ILT |
693 | |
694 | /* FIXME: The following fields are not set: header.next, | |
210c52ac | 695 | header.type, closed, passive_position, symbol_count, |
cd09553a ILT |
696 | next_real_file, is_archive, target, real. This bit of code is |
697 | from the old decode_library_subfile function. I don't know | |
698 | whether any of those fields matters. */ | |
b9395be3 ILT |
699 | |
700 | ldlang_add_file (input); | |
701 | ||
2a9fa50c | 702 | if (config.map_file != (FILE *) NULL) |
efa6c497 ILT |
703 | { |
704 | static boolean header_printed; | |
705 | struct bfd_link_hash_entry *h; | |
706 | bfd *from; | |
707 | int len; | |
708 | ||
709 | h = bfd_link_hash_lookup (link_info.hash, name, false, false, true); | |
710 | ||
711 | if (h == NULL) | |
712 | from = NULL; | |
713 | else | |
714 | { | |
715 | switch (h->type) | |
716 | { | |
717 | default: | |
718 | from = NULL; | |
719 | break; | |
720 | ||
721 | case bfd_link_hash_defined: | |
722 | case bfd_link_hash_defweak: | |
723 | from = h->u.def.section->owner; | |
724 | break; | |
725 | ||
726 | case bfd_link_hash_undefined: | |
727 | case bfd_link_hash_undefweak: | |
728 | from = h->u.undef.abfd; | |
729 | break; | |
730 | ||
731 | case bfd_link_hash_common: | |
732 | from = h->u.c.p->section->owner; | |
733 | break; | |
734 | } | |
735 | } | |
736 | ||
737 | if (! header_printed) | |
738 | { | |
739 | char buf[100]; | |
740 | ||
741 | sprintf (buf, "%-29s %s\n\n", "Archive member included", | |
742 | "because of file (symbol)"); | |
743 | minfo ("%s", buf); | |
744 | header_printed = true; | |
745 | } | |
746 | ||
747 | if (bfd_my_archive (abfd) == NULL) | |
748 | { | |
749 | minfo ("%s", bfd_get_filename (abfd)); | |
750 | len = strlen (bfd_get_filename (abfd)); | |
751 | } | |
752 | else | |
753 | { | |
754 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
755 | bfd_get_filename (abfd)); | |
756 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
757 | + strlen (bfd_get_filename (abfd)) | |
758 | + 2); | |
759 | } | |
760 | ||
761 | if (len >= 29) | |
762 | { | |
763 | print_nl (); | |
764 | len = 0; | |
765 | } | |
766 | while (len < 30) | |
767 | { | |
768 | print_space (); | |
769 | ++len; | |
770 | } | |
771 | ||
772 | if (from != NULL) | |
773 | minfo ("%B ", from); | |
774 | if (h != NULL) | |
775 | minfo ("(%T)\n", h->root.string); | |
776 | else | |
777 | minfo ("(%s)\n", name); | |
778 | } | |
b9395be3 | 779 | |
5dad4c97 ILT |
780 | if (trace_files || trace_file_tries) |
781 | info_msg ("%I\n", input); | |
782 | ||
b9395be3 ILT |
783 | return true; |
784 | } | |
2fa0b342 | 785 | |
b9395be3 ILT |
786 | /* This is called when BFD has discovered a symbol which is defined |
787 | multiple times. */ | |
2fa0b342 | 788 | |
b9395be3 ILT |
789 | /*ARGSUSED*/ |
790 | static boolean | |
791 | multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) | |
792 | struct bfd_link_info *info; | |
793 | const char *name; | |
794 | bfd *obfd; | |
795 | asection *osec; | |
796 | bfd_vma oval; | |
797 | bfd *nbfd; | |
798 | asection *nsec; | |
799 | bfd_vma nval; | |
800 | { | |
6799c638 ILT |
801 | /* If either section has the output_section field set to |
802 | bfd_abs_section_ptr, it means that the section is being | |
803 | discarded, and this is not really a multiple definition at all. | |
804 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
805 | sections which are being discarded. */ | |
806 | if ((osec->output_section != NULL | |
d7339c87 | 807 | && ! bfd_is_abs_section (osec) |
6799c638 ILT |
808 | && bfd_is_abs_section (osec->output_section)) |
809 | || (nsec->output_section != NULL | |
d7339c87 | 810 | && ! bfd_is_abs_section (nsec) |
6799c638 ILT |
811 | && bfd_is_abs_section (nsec->output_section))) |
812 | return true; | |
813 | ||
b9395be3 ILT |
814 | einfo ("%X%C: multiple definition of `%T'\n", |
815 | nbfd, nsec, nval, name); | |
816 | if (obfd != (bfd *) NULL) | |
cc23cc69 | 817 | einfo ("%D: first defined here\n", obfd, osec, oval); |
b9395be3 | 818 | return true; |
2fa0b342 DHW |
819 | } |
820 | ||
b9395be3 ILT |
821 | /* This is called when there is a definition of a common symbol, or |
822 | when a common symbol is found for a symbol that is already defined, | |
823 | or when two common symbols are found. We only do something if | |
824 | -warn-common was used. */ | |
825 | ||
826 | /*ARGSUSED*/ | |
827 | static boolean | |
828 | multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) | |
829 | struct bfd_link_info *info; | |
830 | const char *name; | |
831 | bfd *obfd; | |
832 | enum bfd_link_hash_type otype; | |
833 | bfd_vma osize; | |
834 | bfd *nbfd; | |
835 | enum bfd_link_hash_type ntype; | |
836 | bfd_vma nsize; | |
99fe4553 | 837 | { |
b9395be3 ILT |
838 | if (! config.warn_common) |
839 | return true; | |
99fe4553 | 840 | |
8ed88239 ILT |
841 | if (ntype == bfd_link_hash_defined |
842 | || ntype == bfd_link_hash_defweak | |
843 | || ntype == bfd_link_hash_indirect) | |
e47bfa63 | 844 | { |
b9395be3 ILT |
845 | ASSERT (otype == bfd_link_hash_common); |
846 | einfo ("%B: warning: definition of `%T' overriding common\n", | |
847 | nbfd, name); | |
8ed88239 ILT |
848 | if (obfd != NULL) |
849 | einfo ("%B: warning: common is here\n", obfd); | |
e47bfa63 | 850 | } |
8ed88239 ILT |
851 | else if (otype == bfd_link_hash_defined |
852 | || otype == bfd_link_hash_defweak | |
853 | || otype == bfd_link_hash_indirect) | |
2fa0b342 | 854 | { |
b9395be3 ILT |
855 | ASSERT (ntype == bfd_link_hash_common); |
856 | einfo ("%B: warning: common of `%T' overridden by definition\n", | |
857 | nbfd, name); | |
8ed88239 ILT |
858 | if (obfd != NULL) |
859 | einfo ("%B: warning: defined here\n", obfd); | |
b9395be3 ILT |
860 | } |
861 | else | |
862 | { | |
863 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
864 | if (osize > nsize) | |
2fa0b342 | 865 | { |
b9395be3 ILT |
866 | einfo ("%B: warning: common of `%T' overridden by larger common\n", |
867 | nbfd, name); | |
8ed88239 ILT |
868 | if (obfd != NULL) |
869 | einfo ("%B: warning: larger common is here\n", obfd); | |
2fa0b342 | 870 | } |
b9395be3 | 871 | else if (nsize > osize) |
2fa0b342 | 872 | { |
b9395be3 ILT |
873 | einfo ("%B: warning: common of `%T' overriding smaller common\n", |
874 | nbfd, name); | |
8ed88239 ILT |
875 | if (obfd != NULL) |
876 | einfo ("%B: warning: smaller common is here\n", obfd); | |
2fa0b342 | 877 | } |
e47bfa63 | 878 | else |
2fa0b342 | 879 | { |
b9395be3 | 880 | einfo ("%B: warning: multiple common of `%T'\n", nbfd, name); |
8ed88239 ILT |
881 | if (obfd != NULL) |
882 | einfo ("%B: warning: previous common is here\n", obfd); | |
2fa0b342 DHW |
883 | } |
884 | } | |
885 | ||
b9395be3 | 886 | return true; |
2fa0b342 DHW |
887 | } |
888 | ||
b9395be3 ILT |
889 | /* This is called when BFD has discovered a set element. H is the |
890 | entry in the linker hash table for the set. SECTION and VALUE | |
891 | represent a value which should be added to the set. */ | |
2fa0b342 | 892 | |
b9395be3 ILT |
893 | /*ARGSUSED*/ |
894 | static boolean | |
2a9fa50c | 895 | add_to_set (info, h, reloc, abfd, section, value) |
b9395be3 ILT |
896 | struct bfd_link_info *info; |
897 | struct bfd_link_hash_entry *h; | |
2a9fa50c | 898 | bfd_reloc_code_real_type reloc; |
b9395be3 ILT |
899 | bfd *abfd; |
900 | asection *section; | |
901 | bfd_vma value; | |
2fa0b342 | 902 | { |
7d6439d9 ILT |
903 | if (config.warn_constructors) |
904 | einfo ("%P: warning: global constructor %s used\n", | |
905 | h->root.string); | |
906 | ||
2a9fa50c ILT |
907 | if (! config.build_constructors) |
908 | return true; | |
909 | ||
4b7d2399 | 910 | ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value); |
2a9fa50c ILT |
911 | |
912 | if (h->type == bfd_link_hash_new) | |
913 | { | |
914 | h->type = bfd_link_hash_undefined; | |
915 | h->u.undef.abfd = abfd; | |
916 | /* We don't call bfd_link_add_undef to add this to the list of | |
917 | undefined symbols because we are going to define it | |
918 | ourselves. */ | |
919 | } | |
920 | ||
b9395be3 ILT |
921 | return true; |
922 | } | |
1418c83b | 923 | |
b9395be3 ILT |
924 | /* This is called when BFD has discovered a constructor. This is only |
925 | called for some object file formats--those which do not handle | |
926 | constructors in some more clever fashion. This is similar to | |
927 | adding an element to a set, but less general. */ | |
2fa0b342 | 928 | |
b9395be3 | 929 | static boolean |
2a9fa50c | 930 | constructor_callback (info, constructor, name, abfd, section, value) |
b9395be3 ILT |
931 | struct bfd_link_info *info; |
932 | boolean constructor; | |
b9395be3 ILT |
933 | const char *name; |
934 | bfd *abfd; | |
935 | asection *section; | |
936 | bfd_vma value; | |
937 | { | |
b9395be3 ILT |
938 | char *s; |
939 | struct bfd_link_hash_entry *h; | |
7d6439d9 ILT |
940 | char set_name[1 + sizeof "__CTOR_LIST__"]; |
941 | ||
942 | if (config.warn_constructors) | |
943 | einfo ("%P: warning: global constructor %s used\n", name); | |
b9395be3 ILT |
944 | |
945 | if (! config.build_constructors) | |
946 | return true; | |
947 | ||
2a9fa50c ILT |
948 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a |
949 | useful error message. */ | |
4b7d2399 ILT |
950 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL |
951 | && (link_info.relocateable | |
952 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) | |
7d6439d9 | 953 | einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"); |
2a9fa50c | 954 | |
b9395be3 ILT |
955 | s = set_name; |
956 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
957 | *s++ = bfd_get_symbol_leading_char (abfd); | |
958 | if (constructor) | |
959 | strcpy (s, "__CTOR_LIST__"); | |
29f33467 | 960 | else |
b9395be3 | 961 | strcpy (s, "__DTOR_LIST__"); |
2fa0b342 | 962 | |
b9395be3 ILT |
963 | h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); |
964 | if (h == (struct bfd_link_hash_entry *) NULL) | |
7d6439d9 | 965 | einfo ("%P%F: bfd_link_hash_lookup failed: %E\n"); |
b9395be3 | 966 | if (h->type == bfd_link_hash_new) |
e47bfa63 | 967 | { |
b9395be3 ILT |
968 | h->type = bfd_link_hash_undefined; |
969 | h->u.undef.abfd = abfd; | |
970 | /* We don't call bfd_link_add_undef to add this to the list of | |
971 | undefined symbols because we are going to define it | |
972 | ourselves. */ | |
2fa0b342 | 973 | } |
2fa0b342 | 974 | |
4b7d2399 | 975 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); |
b9395be3 | 976 | return true; |
2fa0b342 DHW |
977 | } |
978 | ||
7d6439d9 ILT |
979 | /* A structure used by warning_callback to pass information through |
980 | bfd_map_over_sections. */ | |
981 | ||
982 | struct warning_callback_info | |
983 | { | |
984 | boolean found; | |
985 | const char *warning; | |
986 | const char *symbol; | |
987 | asymbol **asymbols; | |
988 | }; | |
989 | ||
b9395be3 | 990 | /* This is called when there is a reference to a warning symbol. */ |
2fa0b342 | 991 | |
b9395be3 ILT |
992 | /*ARGSUSED*/ |
993 | static boolean | |
7d6439d9 | 994 | warning_callback (info, warning, symbol, abfd, section, address) |
b9395be3 ILT |
995 | struct bfd_link_info *info; |
996 | const char *warning; | |
7d6439d9 ILT |
997 | const char *symbol; |
998 | bfd *abfd; | |
999 | asection *section; | |
1000 | bfd_vma address; | |
2fa0b342 | 1001 | { |
4b7d2399 ILT |
1002 | /* This is a hack to support warn_multiple_gp. FIXME: This should |
1003 | have a cleaner interface, but what? */ | |
1004 | if (! config.warn_multiple_gp | |
1005 | && strcmp (warning, "using multiple gp values") == 0) | |
1006 | return true; | |
1007 | ||
7d6439d9 ILT |
1008 | if (section != NULL) |
1009 | einfo ("%C: %s\n", abfd, section, address, warning); | |
1010 | else if (abfd == NULL) | |
1011 | einfo ("%P: %s\n", warning); | |
1012 | else if (symbol == NULL) | |
1013 | einfo ("%B: %s\n", abfd, warning); | |
1014 | else | |
1015 | { | |
1016 | lang_input_statement_type *entry; | |
1017 | asymbol **asymbols; | |
1018 | struct warning_callback_info info; | |
1019 | ||
1020 | /* Look through the relocs to see if we can find a plausible | |
1021 | address. */ | |
1022 | ||
1023 | entry = (lang_input_statement_type *) abfd->usrdata; | |
1024 | if (entry != NULL && entry->asymbols != NULL) | |
1025 | asymbols = entry->asymbols; | |
1026 | else | |
1027 | { | |
1028 | long symsize; | |
1029 | long symbol_count; | |
1030 | ||
1031 | symsize = bfd_get_symtab_upper_bound (abfd); | |
1032 | if (symsize < 0) | |
1033 | einfo ("%B%F: could not read symbols: %E\n", abfd); | |
1034 | asymbols = (asymbol **) xmalloc (symsize); | |
1035 | symbol_count = bfd_canonicalize_symtab (abfd, asymbols); | |
1036 | if (symbol_count < 0) | |
1037 | einfo ("%B%F: could not read symbols: %E\n", abfd); | |
1038 | if (entry != NULL) | |
1039 | { | |
1040 | entry->asymbols = asymbols; | |
1041 | entry->symbol_count = symbol_count; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | info.found = false; | |
1046 | info.warning = warning; | |
1047 | info.symbol = symbol; | |
1048 | info.asymbols = asymbols; | |
1049 | bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info); | |
1050 | ||
1051 | if (! info.found) | |
1052 | einfo ("%B: %s\n", abfd, warning); | |
582dd77f ILT |
1053 | |
1054 | if (entry == NULL) | |
1055 | free (asymbols); | |
7d6439d9 ILT |
1056 | } |
1057 | ||
b9395be3 | 1058 | return true; |
2fa0b342 DHW |
1059 | } |
1060 | ||
7d6439d9 ILT |
1061 | /* This is called by warning_callback for each section. It checks the |
1062 | relocs of the section to see if it can find a reference to the | |
1063 | symbol which triggered the warning. If it can, it uses the reloc | |
1064 | to give an error message with a file and line number. */ | |
1065 | ||
1066 | static void | |
1067 | warning_find_reloc (abfd, sec, iarg) | |
1068 | bfd *abfd; | |
1069 | asection *sec; | |
1070 | PTR iarg; | |
1071 | { | |
1072 | struct warning_callback_info *info = (struct warning_callback_info *) iarg; | |
1073 | long relsize; | |
1074 | arelent **relpp; | |
1075 | long relcount; | |
1076 | arelent **p, **pend; | |
1077 | ||
1078 | if (info->found) | |
1079 | return; | |
1080 | ||
1081 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1082 | if (relsize < 0) | |
1083 | einfo ("%B%F: could not read relocs: %E\n", abfd); | |
1084 | if (relsize == 0) | |
1085 | return; | |
1086 | ||
1087 | relpp = (arelent **) xmalloc (relsize); | |
1088 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); | |
1089 | if (relcount < 0) | |
1090 | einfo ("%B%F: could not read relocs: %E\n", abfd); | |
1091 | ||
1092 | p = relpp; | |
1093 | pend = p + relcount; | |
1094 | for (; p < pend && *p != NULL; p++) | |
1095 | { | |
1096 | arelent *q = *p; | |
1097 | ||
1098 | if (q->sym_ptr_ptr != NULL | |
1099 | && *q->sym_ptr_ptr != NULL | |
1100 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1101 | { | |
1102 | /* We found a reloc for the symbol we are looking for. */ | |
1103 | einfo ("%C: %s\n", abfd, sec, q->address, info->warning); | |
1104 | info->found = true; | |
1105 | break; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | free (relpp); | |
1110 | } | |
1111 | ||
b9395be3 | 1112 | /* This is called when an undefined symbol is found. */ |
2fa0b342 | 1113 | |
b9395be3 ILT |
1114 | /*ARGSUSED*/ |
1115 | static boolean | |
1116 | undefined_symbol (info, name, abfd, section, address) | |
1117 | struct bfd_link_info *info; | |
1118 | const char *name; | |
1119 | bfd *abfd; | |
1120 | asection *section; | |
1121 | bfd_vma address; | |
1122 | { | |
1123 | static char *error_name; | |
1124 | static unsigned int error_count; | |
29f33467 | 1125 | |
b9395be3 | 1126 | #define MAX_ERRORS_IN_A_ROW 5 |
8a045e50 | 1127 | |
809ee7e0 ILT |
1128 | if (config.warn_once) |
1129 | { | |
1130 | static struct bfd_hash_table *hash; | |
1131 | ||
1132 | /* Only warn once about a particular undefined symbol. */ | |
1133 | ||
1134 | if (hash == NULL) | |
1135 | { | |
1136 | hash = ((struct bfd_hash_table *) | |
1137 | xmalloc (sizeof (struct bfd_hash_table))); | |
1138 | if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) | |
1139 | einfo ("%F%P: bfd_hash_table_init failed: %E\n"); | |
1140 | } | |
1141 | ||
1142 | if (bfd_hash_lookup (hash, name, false, false) != NULL) | |
1143 | return true; | |
1144 | ||
1145 | if (bfd_hash_lookup (hash, name, true, true) == NULL) | |
1146 | einfo ("%F%P: bfd_hash_lookup failed: %E\n"); | |
1147 | } | |
1148 | ||
b9395be3 ILT |
1149 | /* We never print more than a reasonable number of errors in a row |
1150 | for a single symbol. */ | |
1151 | if (error_name != (char *) NULL | |
1152 | && strcmp (name, error_name) == 0) | |
1153 | ++error_count; | |
1154 | else | |
e47bfa63 | 1155 | { |
b9395be3 ILT |
1156 | error_count = 0; |
1157 | if (error_name != (char *) NULL) | |
1158 | free (error_name); | |
1159 | error_name = buystring (name); | |
1160 | } | |
2fa0b342 | 1161 | |
23244cd6 ILT |
1162 | if (section != NULL) |
1163 | { | |
1164 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
1165 | einfo ("%X%C: undefined reference to `%T'\n", | |
1166 | abfd, section, address, name); | |
1167 | else if (error_count == MAX_ERRORS_IN_A_ROW) | |
1168 | einfo ("%D: more undefined references to `%T' follow\n", | |
1169 | abfd, section, address, name); | |
1170 | } | |
1171 | else | |
1172 | { | |
1173 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
1174 | einfo ("%X%B: undefined reference to `%T'\n", | |
1175 | abfd, name); | |
1176 | else if (error_count == MAX_ERRORS_IN_A_ROW) | |
1177 | einfo ("%B: more undefined references to `%T' follow\n", | |
1178 | abfd, name); | |
1179 | } | |
2fa0b342 | 1180 | |
b9395be3 | 1181 | return true; |
2fa0b342 DHW |
1182 | } |
1183 | ||
b9395be3 | 1184 | /* This is called when a reloc overflows. */ |
2fa0b342 | 1185 | |
b9395be3 | 1186 | /*ARGSUSED*/ |
9f629407 | 1187 | static boolean |
5dad4c97 | 1188 | reloc_overflow (info, name, reloc_name, addend, abfd, section, address) |
b9395be3 | 1189 | struct bfd_link_info *info; |
5dad4c97 ILT |
1190 | const char *name; |
1191 | const char *reloc_name; | |
1192 | bfd_vma addend; | |
b9395be3 ILT |
1193 | bfd *abfd; |
1194 | asection *section; | |
1195 | bfd_vma address; | |
2fa0b342 | 1196 | { |
2a9fa50c ILT |
1197 | if (abfd == (bfd *) NULL) |
1198 | einfo ("%P%X: generated"); | |
1199 | else | |
1200 | einfo ("%X%C:", abfd, section, address); | |
1201 | einfo (" relocation truncated to fit: %s %T", reloc_name, name); | |
5dad4c97 ILT |
1202 | if (addend != 0) |
1203 | einfo ("+%v", addend); | |
1204 | einfo ("\n"); | |
b9395be3 ILT |
1205 | return true; |
1206 | } | |
2fa0b342 | 1207 | |
b9395be3 | 1208 | /* This is called when a dangerous relocation is made. */ |
3e4c643d | 1209 | |
b9395be3 ILT |
1210 | /*ARGSUSED*/ |
1211 | static boolean | |
1212 | reloc_dangerous (info, message, abfd, section, address) | |
1213 | struct bfd_link_info *info; | |
1214 | const char *message; | |
1215 | bfd *abfd; | |
1216 | asection *section; | |
1217 | bfd_vma address; | |
1218 | { | |
2a9fa50c ILT |
1219 | if (abfd == (bfd *) NULL) |
1220 | einfo ("%P%X: generated"); | |
1221 | else | |
1222 | einfo ("%X%C:", abfd, section, address); | |
1223 | einfo ("dangerous relocation: %s\n", message); | |
b9395be3 ILT |
1224 | return true; |
1225 | } | |
973e421e | 1226 | |
b9395be3 ILT |
1227 | /* This is called when a reloc is being generated attached to a symbol |
1228 | that is not being output. */ | |
2fa0b342 | 1229 | |
b9395be3 ILT |
1230 | /*ARGSUSED*/ |
1231 | static boolean | |
1232 | unattached_reloc (info, name, abfd, section, address) | |
1233 | struct bfd_link_info *info; | |
1234 | const char *name; | |
1235 | bfd *abfd; | |
1236 | asection *section; | |
1237 | bfd_vma address; | |
1238 | { | |
2a9fa50c ILT |
1239 | if (abfd == (bfd *) NULL) |
1240 | einfo ("%P%X: generated"); | |
1241 | else | |
1242 | einfo ("%X%C:", abfd, section, address); | |
1243 | einfo (" reloc refers to symbol `%T' which is not being output\n", name); | |
b9395be3 | 1244 | return true; |
2fa0b342 | 1245 | } |
8a045e50 | 1246 | |
cd09553a ILT |
1247 | /* This is called if link_info.notice_all is set, or when a symbol in |
1248 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1249 | using the -y option. */ | |
b9395be3 | 1250 | |
b9395be3 | 1251 | static boolean |
cd09553a | 1252 | notice (info, name, abfd, section, value) |
b9395be3 ILT |
1253 | struct bfd_link_info *info; |
1254 | const char *name; | |
1255 | bfd *abfd; | |
1256 | asection *section; | |
1257 | bfd_vma value; | |
8a045e50 | 1258 | { |
cd09553a ILT |
1259 | if (! info->notice_all |
1260 | || (info->notice_hash != NULL | |
1261 | && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL)) | |
1262 | einfo ("%B: %s %s\n", abfd, | |
1263 | bfd_is_und_section (section) ? "reference to" : "definition of", | |
1264 | name); | |
1265 | ||
582dd77f | 1266 | if (command_line.cref || nocrossref_list != NULL) |
cd09553a ILT |
1267 | add_cref (name, abfd, section, value); |
1268 | ||
b9395be3 | 1269 | return true; |
8a045e50 | 1270 | } |