Commit | Line | Data |
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8594f568 | 1 | /* Main program of GNU linker. |
0b2f8d2e | 2 | Copyright (C) 1991, 92, 93, 94 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 | |
18 | along with GLD; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
2fa0b342 | 21 | |
2fa0b342 | 22 | #include "bfd.h" |
f177a611 | 23 | #include "sysdep.h" |
b9395be3 | 24 | #include <stdio.h> |
d4e5e3c3 | 25 | #include "libiberty.h" |
b9395be3 | 26 | #include "bfdlink.h" |
2fa0b342 DHW |
27 | |
28 | #include "config.h" | |
29 | #include "ld.h" | |
30 | #include "ldmain.h" | |
31 | #include "ldmisc.h" | |
32 | #include "ldwrite.h" | |
33 | #include "ldgram.h" | |
fcf276c4 | 34 | #include "ldexp.h" |
2fa0b342 | 35 | #include "ldlang.h" |
8c514453 | 36 | #include "ldemul.h" |
2fa0b342 DHW |
37 | #include "ldlex.h" |
38 | #include "ldfile.h" | |
c611e285 | 39 | #include "ldctor.h" |
9d1fe8a4 | 40 | |
922018a1 | 41 | /* Somewhere above, sys/stat.h got included . . . . */ |
d723cd17 DM |
42 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
43 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
44 | #endif | |
45 | ||
46 | #include <string.h> | |
47 | ||
fcf276c4 ILT |
48 | static char *get_emulation PARAMS ((int, char **)); |
49 | static void set_scripts_dir PARAMS ((void)); | |
e47bfa63 | 50 | |
2fa0b342 DHW |
51 | /* EXPORTS */ |
52 | ||
53 | char *default_target; | |
fcf276c4 | 54 | const char *output_filename = "a.out"; |
e47bfa63 | 55 | |
2fa0b342 DHW |
56 | /* Name this program was invoked by. */ |
57 | char *program_name; | |
58 | ||
59 | /* The file that we're creating */ | |
b6316534 | 60 | bfd *output_bfd = 0; |
2fa0b342 | 61 | |
173a0c3d DM |
62 | /* Set by -G argument, for MIPS ECOFF target. */ |
63 | int g_switch_value = 8; | |
64 | ||
2fa0b342 DHW |
65 | /* Nonzero means print names of input files as processed. */ |
66 | boolean trace_files; | |
67 | ||
bbd2521f DM |
68 | /* Nonzero means same, but note open failures, too. */ |
69 | boolean trace_file_tries; | |
70 | ||
7b40f2b1 DM |
71 | /* Nonzero means version number was printed, so exit successfully |
72 | instead of complaining if no input files are given. */ | |
73 | boolean version_printed; | |
74 | ||
2fa0b342 | 75 | args_type command_line; |
173a0c3d | 76 | |
2fa0b342 | 77 | ld_config_type config; |
9f629407 ILT |
78 | |
79 | static boolean check_for_scripts_dir PARAMS ((char *dir)); | |
b9395be3 ILT |
80 | static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, |
81 | const char *)); | |
82 | static boolean multiple_definition PARAMS ((struct bfd_link_info *, | |
83 | const char *, | |
84 | bfd *, asection *, bfd_vma, | |
85 | bfd *, asection *, bfd_vma)); | |
86 | static boolean multiple_common PARAMS ((struct bfd_link_info *, | |
87 | const char *, bfd *, | |
88 | enum bfd_link_hash_type, bfd_vma, | |
89 | bfd *, enum bfd_link_hash_type, | |
90 | bfd_vma)); | |
91 | static boolean add_to_set PARAMS ((struct bfd_link_info *, | |
92 | struct bfd_link_hash_entry *, | |
2a9fa50c | 93 | bfd_reloc_code_real_type, |
b9395be3 ILT |
94 | bfd *, asection *, bfd_vma)); |
95 | static boolean constructor_callback PARAMS ((struct bfd_link_info *, | |
96 | boolean constructor, | |
b9395be3 ILT |
97 | const char *name, |
98 | bfd *, asection *, bfd_vma)); | |
99 | static boolean warning_callback PARAMS ((struct bfd_link_info *, | |
100 | const char *)); | |
101 | static boolean undefined_symbol PARAMS ((struct bfd_link_info *, | |
102 | const char *, bfd *, | |
103 | asection *, bfd_vma)); | |
5dad4c97 ILT |
104 | static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, |
105 | const char *, bfd_vma, | |
106 | bfd *, asection *, bfd_vma)); | |
b9395be3 ILT |
107 | static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, |
108 | bfd *, asection *, bfd_vma)); | |
109 | static boolean unattached_reloc PARAMS ((struct bfd_link_info *, | |
110 | const char *, bfd *, asection *, | |
111 | bfd_vma)); | |
112 | static boolean notice_ysym PARAMS ((struct bfd_link_info *, const char *, | |
113 | bfd *, asection *, bfd_vma)); | |
114 | ||
115 | static struct bfd_link_callbacks link_callbacks = | |
116 | { | |
117 | add_archive_element, | |
118 | multiple_definition, | |
119 | multiple_common, | |
120 | add_to_set, | |
121 | constructor_callback, | |
122 | warning_callback, | |
123 | undefined_symbol, | |
124 | reloc_overflow, | |
125 | reloc_dangerous, | |
126 | unattached_reloc, | |
127 | notice_ysym | |
128 | }; | |
129 | ||
130 | struct bfd_link_info link_info; | |
173a0c3d | 131 | \f |
0b2f8d2e DM |
132 | static void |
133 | remove_output () | |
134 | { | |
135 | if (output_filename) | |
136 | { | |
137 | if (output_bfd && output_bfd->iostream) | |
138 | fclose((FILE *)(output_bfd->iostream)); | |
139 | if (delete_output_file_on_failure) | |
140 | unlink (output_filename); | |
141 | } | |
142 | } | |
143 | ||
9f629407 | 144 | int |
2fa0b342 | 145 | main (argc, argv) |
2fa0b342 | 146 | int argc; |
9f629407 | 147 | char **argv; |
2fa0b342 DHW |
148 | { |
149 | char *emulation; | |
8594f568 | 150 | long start_time = get_run_time (); |
e47bfa63 | 151 | |
2fa0b342 | 152 | program_name = argv[0]; |
5bcb7f28 | 153 | xmalloc_set_program_name (program_name); |
99fe4553 | 154 | |
e47bfa63 | 155 | bfd_init (); |
bfbdc80f | 156 | |
5bcb7f28 | 157 | xatexit (remove_output); |
0b2f8d2e | 158 | |
2fa0b342 | 159 | /* Initialize the data about options. */ |
7b40f2b1 | 160 | trace_files = trace_file_tries = version_printed = false; |
c96386c4 | 161 | config.traditional_format = false; |
b9395be3 | 162 | config.build_constructors = true; |
2a9fa50c | 163 | config.dynamic_link = false; |
2fa0b342 | 164 | command_line.force_common_definition = false; |
7fb9ca5f | 165 | command_line.interpreter = NULL; |
cc23cc69 | 166 | command_line.rpath = NULL; |
2fa0b342 | 167 | |
b9395be3 ILT |
168 | link_info.callbacks = &link_callbacks; |
169 | link_info.relocateable = false; | |
64887de2 | 170 | link_info.shared = false; |
b9395be3 ILT |
171 | link_info.strip = strip_none; |
172 | link_info.discard = discard_none; | |
173 | link_info.lprefix_len = 1; | |
174 | link_info.lprefix = "L"; | |
175 | link_info.keep_memory = true; | |
176 | link_info.input_bfds = NULL; | |
177 | link_info.create_object_symbols_section = NULL; | |
178 | link_info.hash = NULL; | |
179 | link_info.keep_hash = NULL; | |
180 | link_info.notice_hash = NULL; | |
181 | ||
e47bfa63 | 182 | ldfile_add_arch (""); |
a72f4e5f | 183 | |
2fa0b342 DHW |
184 | config.make_executable = true; |
185 | force_make_executable = false; | |
ce4d59e2 SC |
186 | config.magic_demand_paged = true; |
187 | config.text_read_only = true; | |
2fa0b342 | 188 | config.make_executable = true; |
1418c83b | 189 | |
d723cd17 | 190 | emulation = get_emulation (argc, argv); |
e47bfa63 SC |
191 | ldemul_choose_mode (emulation); |
192 | default_target = ldemul_choose_target (); | |
193 | lang_init (); | |
194 | ldemul_before_parse (); | |
2fa0b342 | 195 | lang_has_input_file = false; |
e47bfa63 | 196 | parse_args (argc, argv); |
f3739bc3 | 197 | |
2a9fa50c ILT |
198 | if (link_info.relocateable) |
199 | { | |
200 | if (command_line.relax) | |
201 | einfo ("%P%F: -relax and -r may not be used together\n"); | |
202 | if (config.dynamic_link) | |
203 | einfo ("%P%F: -r and -call_shared may not be used together\n"); | |
204 | if (link_info.strip == strip_all) | |
205 | einfo ("%P%F: -r and -s may not be used together\n"); | |
64887de2 ILT |
206 | if (link_info.shared) |
207 | einfo ("%P%F: -r and -shared may not be used together\n"); | |
2a9fa50c ILT |
208 | } |
209 | ||
973e421e ILT |
210 | /* This essentially adds another -L directory so this must be done after |
211 | the -L's in argv have been processed. */ | |
212 | set_scripts_dir (); | |
213 | ||
bbd2521f DM |
214 | if (had_script == false) |
215 | { | |
216 | /* Read the emulation's appropriate default script. */ | |
2a28d8b0 DM |
217 | int isfile; |
218 | char *s = ldemul_get_script (&isfile); | |
219 | ||
220 | if (isfile) | |
d4e5e3c3 | 221 | ldfile_open_command_file (s); |
2a28d8b0 | 222 | else |
d4e5e3c3 DM |
223 | lex_redirect (s); |
224 | parser_input = input_script; | |
225 | yyparse (); | |
bbd2521f DM |
226 | } |
227 | ||
e47bfa63 | 228 | lang_final (); |
9d1fe8a4 | 229 | |
e47bfa63 SC |
230 | if (lang_has_input_file == false) |
231 | { | |
7b40f2b1 | 232 | if (version_printed) |
0b2f8d2e | 233 | xexit (0); |
973e421e | 234 | einfo ("%P%F: no input files\n"); |
870f54b2 | 235 | } |
2fa0b342 | 236 | |
bbd2521f DM |
237 | if (trace_files) |
238 | { | |
973e421e | 239 | info_msg ("%P: mode %s\n", emulation); |
bbd2521f DM |
240 | } |
241 | ||
e47bfa63 | 242 | ldemul_after_parse (); |
870f54b2 | 243 | |
9d1fe8a4 | 244 | |
e47bfa63 | 245 | if (config.map_filename) |
870f54b2 | 246 | { |
e47bfa63 | 247 | if (strcmp (config.map_filename, "-") == 0) |
2e2bf962 | 248 | { |
e47bfa63 | 249 | config.map_file = stdout; |
2e2bf962 | 250 | } |
e47bfa63 SC |
251 | else |
252 | { | |
253 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
254 | if (config.map_file == (FILE *) NULL) | |
255 | { | |
bbd2521f | 256 | einfo ("%P%F: cannot open map file %s: %E\n", |
e47bfa63 SC |
257 | config.map_filename); |
258 | } | |
259 | } | |
260 | } | |
870f54b2 | 261 | |
2e2bf962 | 262 | |
e47bfa63 | 263 | lang_process (); |
2fa0b342 | 264 | |
2fa0b342 DHW |
265 | /* Print error messages for any missing symbols, for any warning |
266 | symbols, and possibly multiple definitions */ | |
267 | ||
2fa0b342 | 268 | |
e47bfa63 SC |
269 | if (config.text_read_only) |
270 | { | |
271 | /* Look for a text section and mark the readonly attribute in it */ | |
272 | asection *found = bfd_get_section_by_name (output_bfd, ".text"); | |
273 | ||
274 | if (found != (asection *) NULL) | |
275 | { | |
276 | found->flags |= SEC_READONLY; | |
277 | } | |
3e4c643d | 278 | } |
2fa0b342 | 279 | |
b9395be3 | 280 | if (link_info.relocateable) |
f3739bc3 | 281 | output_bfd->flags &= ~EXEC_P; |
a72f4e5f | 282 | else |
f3739bc3 | 283 | output_bfd->flags |= EXEC_P; |
b257477f | 284 | |
f3739bc3 | 285 | ldwrite (); |
b257477f | 286 | |
f3739bc3 SC |
287 | /* Even if we're producing relocateable output, some non-fatal errors should |
288 | be reported in the exit status. (What non-fatal errors, if any, do we | |
289 | want to ignore for relocateable output?) */ | |
a72f4e5f | 290 | |
f3739bc3 SC |
291 | if (config.make_executable == false && force_make_executable == false) |
292 | { | |
293 | if (trace_files == true) | |
e47bfa63 | 294 | { |
973e421e | 295 | einfo ("%P: link errors found, deleting executable `%s'\n", |
f3739bc3 | 296 | output_filename); |
e47bfa63 | 297 | } |
a72f4e5f | 298 | |
f3739bc3 SC |
299 | if (output_bfd->iostream) |
300 | fclose ((FILE *) (output_bfd->iostream)); | |
a72f4e5f | 301 | |
f3739bc3 | 302 | unlink (output_filename); |
0b2f8d2e | 303 | xexit (1); |
f3739bc3 SC |
304 | } |
305 | else | |
306 | { | |
2a9fa50c ILT |
307 | if (! bfd_close (output_bfd)) |
308 | einfo ("%F%B: final close failed: %E\n", output_bfd); | |
f3739bc3 | 309 | } |
2fa0b342 | 310 | |
b9395be3 ILT |
311 | if (config.stats) |
312 | { | |
313 | extern char **environ; | |
314 | char *lim = (char *) sbrk (0); | |
8594f568 | 315 | long run_time = get_run_time () - start_time; |
b9395be3 | 316 | |
5bcb7f28 | 317 | fprintf (stderr, "%s: total time in link: %ld.%06ld\n", |
8594f568 | 318 | program_name, run_time / 1000000, run_time % 1000000); |
b9395be3 ILT |
319 | fprintf (stderr, "%s: data size %ld\n", program_name, |
320 | (long) (lim - (char *) &environ)); | |
321 | } | |
322 | ||
52a8ebfe DM |
323 | /* Prevent remove_output from doing anything, after a successful link. */ |
324 | output_filename = NULL; | |
325 | ||
0b2f8d2e | 326 | xexit (0); |
9f629407 | 327 | return 0; |
d723cd17 DM |
328 | } |
329 | ||
330 | /* We need to find any explicitly given emulation in order to initialize the | |
331 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
332 | ||
333 | static char * | |
334 | get_emulation (argc, argv) | |
335 | int argc; | |
336 | char **argv; | |
337 | { | |
338 | char *emulation; | |
339 | int i; | |
340 | ||
d723cd17 DM |
341 | emulation = (char *) getenv (EMULATION_ENVIRON); |
342 | if (emulation == NULL) | |
343 | emulation = DEFAULT_EMULATION; | |
d723cd17 DM |
344 | |
345 | for (i = 1; i < argc; i++) | |
346 | { | |
347 | if (!strncmp (argv[i], "-m", 2)) | |
348 | { | |
349 | if (argv[i][2] == '\0') | |
350 | { | |
351 | /* -m EMUL */ | |
352 | if (i < argc - 1) | |
353 | { | |
354 | emulation = argv[i + 1]; | |
355 | i++; | |
356 | } | |
357 | else | |
358 | { | |
973e421e | 359 | einfo("%P%F: missing argument to -m\n"); |
d723cd17 DM |
360 | } |
361 | } | |
973e421e ILT |
362 | else if (strcmp (argv[i], "-mips1") == 0 |
363 | || strcmp (argv[i], "-mips2") == 0 | |
364 | || strcmp (argv[i], "-mips3") == 0) | |
365 | { | |
366 | /* FIXME: The arguments -mips1, -mips2 and -mips3 are | |
367 | passed to the linker by some MIPS compilers. They | |
368 | generally tell the linker to use a slightly different | |
369 | library path. Perhaps someday these should be | |
370 | implemented as emulations; until then, we just ignore | |
371 | the arguments and hope that nobody ever creates | |
372 | emulations named ips1, ips2 or ips3. */ | |
373 | } | |
cbbf9608 ILT |
374 | else if (strcmp (argv[i], "-m486") == 0) |
375 | { | |
376 | /* FIXME: The argument -m486 is passed to the linker on | |
377 | some Linux systems. Hope that nobody creates an | |
378 | emulation named 486. */ | |
379 | } | |
d723cd17 DM |
380 | else |
381 | { | |
382 | /* -mEMUL */ | |
383 | emulation = &argv[i][2]; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | return emulation; | |
389 | } | |
390 | ||
391 | /* If directory DIR contains an "ldscripts" subdirectory, | |
392 | add DIR to the library search path and return true, | |
393 | else return false. */ | |
394 | ||
395 | static boolean | |
396 | check_for_scripts_dir (dir) | |
397 | char *dir; | |
398 | { | |
399 | size_t dirlen; | |
400 | char *buf; | |
401 | struct stat s; | |
402 | boolean res; | |
403 | ||
404 | dirlen = strlen (dir); | |
405 | /* sizeof counts the terminating NUL. */ | |
0b2f8d2e | 406 | buf = (char *) xmalloc (dirlen + sizeof("/ldscripts")); |
d723cd17 DM |
407 | sprintf (buf, "%s/ldscripts", dir); |
408 | ||
409 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
f4208462 | 410 | free (buf); |
d723cd17 | 411 | if (res) |
0cd82d00 | 412 | ldfile_add_library_path (dir, false); |
d723cd17 DM |
413 | return res; |
414 | } | |
415 | ||
416 | /* Set the default directory for finding script files. | |
f4208462 DM |
417 | Libraries will be searched for here too, but that's ok. |
418 | We look for the "ldscripts" directory in: | |
419 | ||
f4208462 | 420 | SCRIPTDIR (passed from Makefile) |
bbd2521f DM |
421 | the dir where this program is (for using it from the build tree) |
422 | the dir where this program is/../lib (for installing the tool suite elsewhere) */ | |
d723cd17 DM |
423 | |
424 | static void | |
425 | set_scripts_dir () | |
426 | { | |
f4208462 DM |
427 | char *end, *dir; |
428 | size_t dirlen; | |
429 | ||
d723cd17 | 430 | if (check_for_scripts_dir (SCRIPTDIR)) |
f4208462 | 431 | return; /* We've been installed normally. */ |
d723cd17 DM |
432 | |
433 | /* Look for "ldscripts" in the dir where our binary is. */ | |
434 | end = strrchr (program_name, '/'); | |
bbd2521f DM |
435 | if (end) |
436 | { | |
437 | dirlen = end - program_name; | |
438 | /* Make a copy of program_name in dir. | |
439 | Leave room for later "/../lib". */ | |
0b2f8d2e | 440 | dir = (char *) xmalloc (dirlen + 8); |
bbd2521f DM |
441 | strncpy (dir, program_name, dirlen); |
442 | dir[dirlen] = '\0'; | |
443 | } | |
444 | else | |
445 | { | |
446 | dirlen = 1; | |
0b2f8d2e | 447 | dir = (char *) xmalloc (dirlen + 8); |
bbd2521f DM |
448 | strcpy (dir, "."); |
449 | } | |
f4208462 | 450 | |
f4208462 DM |
451 | if (check_for_scripts_dir (dir)) |
452 | return; /* Don't free dir. */ | |
453 | ||
454 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
455 | strcpy (dir + dirlen, "/../lib"); | |
456 | if (check_for_scripts_dir (dir)) | |
457 | return; | |
458 | ||
459 | free (dir); /* Well, we tried. */ | |
d723cd17 | 460 | } |
2fa0b342 | 461 | |
e47bfa63 | 462 | void |
b9395be3 ILT |
463 | add_ysym (name) |
464 | const char *name; | |
2fa0b342 | 465 | { |
b9395be3 ILT |
466 | if (link_info.notice_hash == (struct bfd_hash_table *) NULL) |
467 | { | |
468 | link_info.notice_hash = ((struct bfd_hash_table *) | |
0b2f8d2e | 469 | xmalloc (sizeof (struct bfd_hash_table))); |
b9395be3 ILT |
470 | if (! bfd_hash_table_init_n (link_info.notice_hash, |
471 | bfd_hash_newfunc, | |
472 | 61)) | |
473 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
474 | } | |
475 | ||
476 | if (bfd_hash_lookup (link_info.notice_hash, name, true, true) | |
477 | == (struct bfd_hash_entry *) NULL) | |
478 | einfo ("%P%F: bfd_hash_lookup failed: %E\n"); | |
2fa0b342 | 479 | } |
e47bfa63 | 480 | |
b9395be3 | 481 | /* Handle the -retain-symbols-file option. */ |
2fa0b342 | 482 | |
2fa0b342 | 483 | void |
b9395be3 ILT |
484 | add_keepsyms_file (filename) |
485 | const char *filename; | |
2fa0b342 | 486 | { |
b9395be3 ILT |
487 | FILE *file; |
488 | char *buf; | |
489 | size_t bufsize; | |
490 | int c; | |
2fa0b342 | 491 | |
b9395be3 ILT |
492 | if (link_info.strip == strip_some) |
493 | einfo ("%X%P: error: duplicate retain-symbols-file\n"); | |
3e4c643d | 494 | |
b9395be3 ILT |
495 | file = fopen (filename, "r"); |
496 | if (file == (FILE *) NULL) | |
e47bfa63 | 497 | { |
5bcb7f28 | 498 | bfd_set_error (bfd_error_system_call); |
b9395be3 ILT |
499 | einfo ("%X%P: %s: %E", filename); |
500 | return; | |
be1627d3 | 501 | } |
be1627d3 | 502 | |
b9395be3 | 503 | link_info.keep_hash = ((struct bfd_hash_table *) |
0b2f8d2e | 504 | xmalloc (sizeof (struct bfd_hash_table))); |
b9395be3 ILT |
505 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) |
506 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
2fa0b342 | 507 | |
b9395be3 | 508 | bufsize = 100; |
0b2f8d2e | 509 | buf = (char *) xmalloc (bufsize); |
c611e285 | 510 | |
b9395be3 ILT |
511 | c = getc (file); |
512 | while (c != EOF) | |
29f33467 | 513 | { |
b9395be3 ILT |
514 | while (isspace (c)) |
515 | c = getc (file); | |
e47bfa63 | 516 | |
b9395be3 | 517 | if (c != EOF) |
29f33467 | 518 | { |
b9395be3 | 519 | size_t len = 0; |
8a045e50 | 520 | |
b9395be3 | 521 | while (! isspace (c) && c != EOF) |
29f33467 | 522 | { |
b9395be3 ILT |
523 | buf[len] = c; |
524 | ++len; | |
525 | if (len >= bufsize) | |
29f33467 | 526 | { |
b9395be3 | 527 | bufsize *= 2; |
0b2f8d2e | 528 | buf = xrealloc (buf, bufsize); |
29f33467 | 529 | } |
b9395be3 | 530 | c = getc (file); |
29f33467 | 531 | } |
81016051 | 532 | |
b9395be3 ILT |
533 | buf[len] = '\0'; |
534 | ||
535 | if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) | |
536 | == (struct bfd_hash_entry *) NULL) | |
537 | einfo ("%P%F: bfd_hash_lookup for insertion failed: %E"); | |
29f33467 | 538 | } |
e47bfa63 | 539 | } |
2fa0b342 | 540 | |
b9395be3 ILT |
541 | if (link_info.strip != strip_none) |
542 | einfo ("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"); | |
8a045e50 | 543 | |
b9395be3 ILT |
544 | link_info.strip = strip_some; |
545 | } | |
546 | \f | |
547 | /* Callbacks from the BFD linker routines. */ | |
2fa0b342 | 548 | |
b9395be3 ILT |
549 | /* This is called when BFD has decided to include an archive member in |
550 | a link. */ | |
2fa0b342 | 551 | |
b9395be3 ILT |
552 | /*ARGSUSED*/ |
553 | static boolean | |
554 | add_archive_element (info, abfd, name) | |
555 | struct bfd_link_info *info; | |
556 | bfd *abfd; | |
557 | const char *name; | |
2fa0b342 | 558 | { |
b9395be3 ILT |
559 | lang_input_statement_type *input; |
560 | ||
561 | input = ((lang_input_statement_type *) | |
0b2f8d2e | 562 | xmalloc ((bfd_size_type) sizeof (lang_input_statement_type))); |
b9395be3 ILT |
563 | input->filename = abfd->filename; |
564 | input->local_sym_name = abfd->filename; | |
565 | input->the_bfd = abfd; | |
566 | input->asymbols = NULL; | |
b9395be3 ILT |
567 | input->next = NULL; |
568 | input->just_syms_flag = false; | |
569 | input->loaded = false; | |
210c52ac | 570 | input->search_dirs_flag = false; |
b9395be3 ILT |
571 | |
572 | /* FIXME: The following fields are not set: header.next, | |
210c52ac ILT |
573 | header.type, closed, passive_position, symbol_count, |
574 | next_real_file, is_archive, target, real, common_section, | |
575 | common_output_section, complained. This bit of code is from the | |
576 | old decode_library_subfile function. I don't know whether any of | |
577 | those fields matters. */ | |
b9395be3 ILT |
578 | |
579 | ldlang_add_file (input); | |
580 | ||
2a9fa50c ILT |
581 | if (config.map_file != (FILE *) NULL) |
582 | minfo ("%s needed due to %T\n", abfd->filename, name); | |
b9395be3 | 583 | |
5dad4c97 ILT |
584 | if (trace_files || trace_file_tries) |
585 | info_msg ("%I\n", input); | |
586 | ||
b9395be3 ILT |
587 | return true; |
588 | } | |
2fa0b342 | 589 | |
b9395be3 ILT |
590 | /* This is called when BFD has discovered a symbol which is defined |
591 | multiple times. */ | |
2fa0b342 | 592 | |
b9395be3 ILT |
593 | /*ARGSUSED*/ |
594 | static boolean | |
595 | multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) | |
596 | struct bfd_link_info *info; | |
597 | const char *name; | |
598 | bfd *obfd; | |
599 | asection *osec; | |
600 | bfd_vma oval; | |
601 | bfd *nbfd; | |
602 | asection *nsec; | |
603 | bfd_vma nval; | |
604 | { | |
605 | einfo ("%X%C: multiple definition of `%T'\n", | |
606 | nbfd, nsec, nval, name); | |
607 | if (obfd != (bfd *) NULL) | |
cc23cc69 | 608 | einfo ("%D: first defined here\n", obfd, osec, oval); |
b9395be3 | 609 | return true; |
2fa0b342 DHW |
610 | } |
611 | ||
b9395be3 ILT |
612 | /* This is called when there is a definition of a common symbol, or |
613 | when a common symbol is found for a symbol that is already defined, | |
614 | or when two common symbols are found. We only do something if | |
615 | -warn-common was used. */ | |
616 | ||
617 | /*ARGSUSED*/ | |
618 | static boolean | |
619 | multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) | |
620 | struct bfd_link_info *info; | |
621 | const char *name; | |
622 | bfd *obfd; | |
623 | enum bfd_link_hash_type otype; | |
624 | bfd_vma osize; | |
625 | bfd *nbfd; | |
626 | enum bfd_link_hash_type ntype; | |
627 | bfd_vma nsize; | |
99fe4553 | 628 | { |
b9395be3 ILT |
629 | if (! config.warn_common) |
630 | return true; | |
99fe4553 | 631 | |
b9395be3 | 632 | if (ntype == bfd_link_hash_defined) |
e47bfa63 | 633 | { |
b9395be3 ILT |
634 | ASSERT (otype == bfd_link_hash_common); |
635 | einfo ("%B: warning: definition of `%T' overriding common\n", | |
636 | nbfd, name); | |
637 | einfo ("%B: warning: common is here\n", obfd); | |
e47bfa63 | 638 | } |
b9395be3 | 639 | else if (otype == bfd_link_hash_defined) |
2fa0b342 | 640 | { |
b9395be3 ILT |
641 | ASSERT (ntype == bfd_link_hash_common); |
642 | einfo ("%B: warning: common of `%T' overridden by definition\n", | |
643 | nbfd, name); | |
644 | einfo ("%B: warning: defined here\n", obfd); | |
645 | } | |
646 | else | |
647 | { | |
648 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
649 | if (osize > nsize) | |
2fa0b342 | 650 | { |
b9395be3 ILT |
651 | einfo ("%B: warning: common of `%T' overridden by larger common\n", |
652 | nbfd, name); | |
653 | einfo ("%B: warning: larger common is here\n", obfd); | |
2fa0b342 | 654 | } |
b9395be3 | 655 | else if (nsize > osize) |
2fa0b342 | 656 | { |
b9395be3 ILT |
657 | einfo ("%B: warning: common of `%T' overriding smaller common\n", |
658 | nbfd, name); | |
659 | einfo ("%B: warning: smaller common is here\n", obfd); | |
2fa0b342 | 660 | } |
e47bfa63 | 661 | else |
2fa0b342 | 662 | { |
b9395be3 ILT |
663 | einfo ("%B: warning: multiple common of `%T'\n", nbfd, name); |
664 | einfo ("%B: warning: previous common is here\n", obfd); | |
2fa0b342 DHW |
665 | } |
666 | } | |
667 | ||
b9395be3 | 668 | return true; |
2fa0b342 DHW |
669 | } |
670 | ||
b9395be3 ILT |
671 | /* This is called when BFD has discovered a set element. H is the |
672 | entry in the linker hash table for the set. SECTION and VALUE | |
673 | represent a value which should be added to the set. */ | |
2fa0b342 | 674 | |
b9395be3 ILT |
675 | /*ARGSUSED*/ |
676 | static boolean | |
2a9fa50c | 677 | add_to_set (info, h, reloc, abfd, section, value) |
b9395be3 ILT |
678 | struct bfd_link_info *info; |
679 | struct bfd_link_hash_entry *h; | |
2a9fa50c | 680 | bfd_reloc_code_real_type reloc; |
b9395be3 ILT |
681 | bfd *abfd; |
682 | asection *section; | |
683 | bfd_vma value; | |
2fa0b342 | 684 | { |
2a9fa50c ILT |
685 | if (! config.build_constructors) |
686 | return true; | |
687 | ||
688 | ldctor_add_set_entry (h, reloc, section, value); | |
689 | ||
690 | if (h->type == bfd_link_hash_new) | |
691 | { | |
692 | h->type = bfd_link_hash_undefined; | |
693 | h->u.undef.abfd = abfd; | |
694 | /* We don't call bfd_link_add_undef to add this to the list of | |
695 | undefined symbols because we are going to define it | |
696 | ourselves. */ | |
697 | } | |
698 | ||
b9395be3 ILT |
699 | return true; |
700 | } | |
1418c83b | 701 | |
b9395be3 ILT |
702 | /* This is called when BFD has discovered a constructor. This is only |
703 | called for some object file formats--those which do not handle | |
704 | constructors in some more clever fashion. This is similar to | |
705 | adding an element to a set, but less general. */ | |
2fa0b342 | 706 | |
b9395be3 | 707 | static boolean |
2a9fa50c | 708 | constructor_callback (info, constructor, name, abfd, section, value) |
b9395be3 ILT |
709 | struct bfd_link_info *info; |
710 | boolean constructor; | |
b9395be3 ILT |
711 | const char *name; |
712 | bfd *abfd; | |
713 | asection *section; | |
714 | bfd_vma value; | |
715 | { | |
716 | char *set_name; | |
717 | char *s; | |
718 | struct bfd_link_hash_entry *h; | |
719 | ||
720 | if (! config.build_constructors) | |
721 | return true; | |
722 | ||
2a9fa50c ILT |
723 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a |
724 | useful error message. */ | |
725 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL) | |
726 | einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported"); | |
727 | ||
b9395be3 ILT |
728 | set_name = (char *) alloca (1 + sizeof "__CTOR_LIST__"); |
729 | s = set_name; | |
730 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
731 | *s++ = bfd_get_symbol_leading_char (abfd); | |
732 | if (constructor) | |
733 | strcpy (s, "__CTOR_LIST__"); | |
29f33467 | 734 | else |
b9395be3 | 735 | strcpy (s, "__DTOR_LIST__"); |
2fa0b342 | 736 | |
2a9fa50c ILT |
737 | if (config.map_file != (FILE *) NULL) |
738 | fprintf (config.map_file, | |
739 | "Adding %s to constructor/destructor set %s\n", name, set_name); | |
e47bfa63 | 740 | |
b9395be3 ILT |
741 | h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); |
742 | if (h == (struct bfd_link_hash_entry *) NULL) | |
743 | einfo ("%P%F: bfd_link_hash_lookup failed: %E"); | |
744 | if (h->type == bfd_link_hash_new) | |
e47bfa63 | 745 | { |
b9395be3 ILT |
746 | h->type = bfd_link_hash_undefined; |
747 | h->u.undef.abfd = abfd; | |
748 | /* We don't call bfd_link_add_undef to add this to the list of | |
749 | undefined symbols because we are going to define it | |
750 | ourselves. */ | |
2fa0b342 | 751 | } |
2fa0b342 | 752 | |
2a9fa50c | 753 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, section, value); |
b9395be3 | 754 | return true; |
2fa0b342 DHW |
755 | } |
756 | ||
b9395be3 | 757 | /* This is called when there is a reference to a warning symbol. */ |
2fa0b342 | 758 | |
b9395be3 ILT |
759 | /*ARGSUSED*/ |
760 | static boolean | |
761 | warning_callback (info, warning) | |
762 | struct bfd_link_info *info; | |
763 | const char *warning; | |
2fa0b342 | 764 | { |
b9395be3 ILT |
765 | einfo ("%P: %s\n", warning); |
766 | return true; | |
2fa0b342 DHW |
767 | } |
768 | ||
b9395be3 | 769 | /* This is called when an undefined symbol is found. */ |
2fa0b342 | 770 | |
b9395be3 ILT |
771 | /*ARGSUSED*/ |
772 | static boolean | |
773 | undefined_symbol (info, name, abfd, section, address) | |
774 | struct bfd_link_info *info; | |
775 | const char *name; | |
776 | bfd *abfd; | |
777 | asection *section; | |
778 | bfd_vma address; | |
779 | { | |
780 | static char *error_name; | |
781 | static unsigned int error_count; | |
29f33467 | 782 | |
b9395be3 | 783 | #define MAX_ERRORS_IN_A_ROW 5 |
8a045e50 | 784 | |
809ee7e0 ILT |
785 | if (config.warn_once) |
786 | { | |
787 | static struct bfd_hash_table *hash; | |
788 | ||
789 | /* Only warn once about a particular undefined symbol. */ | |
790 | ||
791 | if (hash == NULL) | |
792 | { | |
793 | hash = ((struct bfd_hash_table *) | |
794 | xmalloc (sizeof (struct bfd_hash_table))); | |
795 | if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) | |
796 | einfo ("%F%P: bfd_hash_table_init failed: %E\n"); | |
797 | } | |
798 | ||
799 | if (bfd_hash_lookup (hash, name, false, false) != NULL) | |
800 | return true; | |
801 | ||
802 | if (bfd_hash_lookup (hash, name, true, true) == NULL) | |
803 | einfo ("%F%P: bfd_hash_lookup failed: %E\n"); | |
804 | } | |
805 | ||
b9395be3 ILT |
806 | /* We never print more than a reasonable number of errors in a row |
807 | for a single symbol. */ | |
808 | if (error_name != (char *) NULL | |
809 | && strcmp (name, error_name) == 0) | |
810 | ++error_count; | |
811 | else | |
e47bfa63 | 812 | { |
b9395be3 ILT |
813 | error_count = 0; |
814 | if (error_name != (char *) NULL) | |
815 | free (error_name); | |
816 | error_name = buystring (name); | |
817 | } | |
2fa0b342 | 818 | |
b9395be3 ILT |
819 | if (error_count < MAX_ERRORS_IN_A_ROW) |
820 | einfo ("%X%C: undefined reference to `%T'\n", | |
821 | abfd, section, address, name); | |
822 | else if (error_count == MAX_ERRORS_IN_A_ROW) | |
cc23cc69 | 823 | einfo ("%D: more undefined references to `%T' follow\n", |
b9395be3 | 824 | abfd, section, address, name); |
2fa0b342 | 825 | |
b9395be3 | 826 | return true; |
2fa0b342 DHW |
827 | } |
828 | ||
b9395be3 | 829 | /* This is called when a reloc overflows. */ |
2fa0b342 | 830 | |
b9395be3 | 831 | /*ARGSUSED*/ |
9f629407 | 832 | static boolean |
5dad4c97 | 833 | reloc_overflow (info, name, reloc_name, addend, abfd, section, address) |
b9395be3 | 834 | struct bfd_link_info *info; |
5dad4c97 ILT |
835 | const char *name; |
836 | const char *reloc_name; | |
837 | bfd_vma addend; | |
b9395be3 ILT |
838 | bfd *abfd; |
839 | asection *section; | |
840 | bfd_vma address; | |
2fa0b342 | 841 | { |
2a9fa50c ILT |
842 | if (abfd == (bfd *) NULL) |
843 | einfo ("%P%X: generated"); | |
844 | else | |
845 | einfo ("%X%C:", abfd, section, address); | |
846 | einfo (" relocation truncated to fit: %s %T", reloc_name, name); | |
5dad4c97 ILT |
847 | if (addend != 0) |
848 | einfo ("+%v", addend); | |
849 | einfo ("\n"); | |
b9395be3 ILT |
850 | return true; |
851 | } | |
2fa0b342 | 852 | |
b9395be3 | 853 | /* This is called when a dangerous relocation is made. */ |
3e4c643d | 854 | |
b9395be3 ILT |
855 | /*ARGSUSED*/ |
856 | static boolean | |
857 | reloc_dangerous (info, message, abfd, section, address) | |
858 | struct bfd_link_info *info; | |
859 | const char *message; | |
860 | bfd *abfd; | |
861 | asection *section; | |
862 | bfd_vma address; | |
863 | { | |
2a9fa50c ILT |
864 | if (abfd == (bfd *) NULL) |
865 | einfo ("%P%X: generated"); | |
866 | else | |
867 | einfo ("%X%C:", abfd, section, address); | |
868 | einfo ("dangerous relocation: %s\n", message); | |
b9395be3 ILT |
869 | return true; |
870 | } | |
973e421e | 871 | |
b9395be3 ILT |
872 | /* This is called when a reloc is being generated attached to a symbol |
873 | that is not being output. */ | |
2fa0b342 | 874 | |
b9395be3 ILT |
875 | /*ARGSUSED*/ |
876 | static boolean | |
877 | unattached_reloc (info, name, abfd, section, address) | |
878 | struct bfd_link_info *info; | |
879 | const char *name; | |
880 | bfd *abfd; | |
881 | asection *section; | |
882 | bfd_vma address; | |
883 | { | |
2a9fa50c ILT |
884 | if (abfd == (bfd *) NULL) |
885 | einfo ("%P%X: generated"); | |
886 | else | |
887 | einfo ("%X%C:", abfd, section, address); | |
888 | einfo (" reloc refers to symbol `%T' which is not being output\n", name); | |
b9395be3 | 889 | return true; |
2fa0b342 | 890 | } |
8a045e50 | 891 | |
b9395be3 ILT |
892 | /* This is called when a symbol in notice_hash is found. Symbols are |
893 | put in notice_hash using the -y option. */ | |
894 | ||
895 | /*ARGSUSED*/ | |
896 | static boolean | |
897 | notice_ysym (info, name, abfd, section, value) | |
898 | struct bfd_link_info *info; | |
899 | const char *name; | |
900 | bfd *abfd; | |
901 | asection *section; | |
902 | bfd_vma value; | |
8a045e50 | 903 | { |
b9395be3 | 904 | einfo ("%B: %s %s\n", abfd, |
cc23cc69 | 905 | bfd_is_und_section (section) ? "reference to" : "definition of", |
b9395be3 ILT |
906 | name); |
907 | return true; | |
8a045e50 | 908 | } |