Commit | Line | Data |
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8594f568 SS |
1 | /* Main program of GNU linker. |
2 | Copyright (C) 1991, 1993, 1994 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 ILT |
24 | #include <stdio.h> |
25 | #include "bfdlink.h" | |
2fa0b342 DHW |
26 | |
27 | #include "config.h" | |
28 | #include "ld.h" | |
29 | #include "ldmain.h" | |
30 | #include "ldmisc.h" | |
31 | #include "ldwrite.h" | |
32 | #include "ldgram.h" | |
fcf276c4 | 33 | #include "ldexp.h" |
2fa0b342 | 34 | #include "ldlang.h" |
8c514453 | 35 | #include "ldemul.h" |
2fa0b342 DHW |
36 | #include "ldlex.h" |
37 | #include "ldfile.h" | |
c611e285 | 38 | #include "ldctor.h" |
9d1fe8a4 | 39 | |
922018a1 | 40 | /* Somewhere above, sys/stat.h got included . . . . */ |
d723cd17 DM |
41 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
42 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
43 | #endif | |
44 | ||
45 | #include <string.h> | |
46 | ||
fcf276c4 ILT |
47 | static char *get_emulation PARAMS ((int, char **)); |
48 | static void set_scripts_dir PARAMS ((void)); | |
e47bfa63 | 49 | |
2fa0b342 DHW |
50 | /* EXPORTS */ |
51 | ||
52 | char *default_target; | |
fcf276c4 | 53 | const char *output_filename = "a.out"; |
e47bfa63 | 54 | |
2fa0b342 DHW |
55 | /* Name this program was invoked by. */ |
56 | char *program_name; | |
57 | ||
58 | /* The file that we're creating */ | |
b6316534 | 59 | bfd *output_bfd = 0; |
2fa0b342 | 60 | |
173a0c3d DM |
61 | /* Set by -G argument, for MIPS ECOFF target. */ |
62 | int g_switch_value = 8; | |
63 | ||
2fa0b342 DHW |
64 | /* Nonzero means print names of input files as processed. */ |
65 | boolean trace_files; | |
66 | ||
bbd2521f DM |
67 | /* Nonzero means same, but note open failures, too. */ |
68 | boolean trace_file_tries; | |
69 | ||
7b40f2b1 DM |
70 | /* Nonzero means version number was printed, so exit successfully |
71 | instead of complaining if no input files are given. */ | |
72 | boolean version_printed; | |
73 | ||
2fa0b342 DHW |
74 | /* 1 => write load map. */ |
75 | boolean write_map; | |
76 | ||
2fa0b342 | 77 | args_type command_line; |
173a0c3d | 78 | |
2fa0b342 | 79 | ld_config_type config; |
9f629407 ILT |
80 | |
81 | static boolean check_for_scripts_dir PARAMS ((char *dir)); | |
b9395be3 ILT |
82 | static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, |
83 | const char *)); | |
84 | static boolean multiple_definition PARAMS ((struct bfd_link_info *, | |
85 | const char *, | |
86 | bfd *, asection *, bfd_vma, | |
87 | bfd *, asection *, bfd_vma)); | |
88 | static boolean multiple_common PARAMS ((struct bfd_link_info *, | |
89 | const char *, bfd *, | |
90 | enum bfd_link_hash_type, bfd_vma, | |
91 | bfd *, enum bfd_link_hash_type, | |
92 | bfd_vma)); | |
93 | static boolean add_to_set PARAMS ((struct bfd_link_info *, | |
94 | struct bfd_link_hash_entry *, | |
95 | unsigned int bitsize, | |
96 | bfd *, asection *, bfd_vma)); | |
97 | static boolean constructor_callback PARAMS ((struct bfd_link_info *, | |
98 | boolean constructor, | |
99 | unsigned int bitsize, | |
100 | const char *name, | |
101 | bfd *, asection *, bfd_vma)); | |
102 | static boolean warning_callback PARAMS ((struct bfd_link_info *, | |
103 | const char *)); | |
104 | static boolean undefined_symbol PARAMS ((struct bfd_link_info *, | |
105 | const char *, bfd *, | |
106 | asection *, bfd_vma)); | |
5dad4c97 ILT |
107 | static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, |
108 | const char *, bfd_vma, | |
109 | bfd *, asection *, bfd_vma)); | |
b9395be3 ILT |
110 | static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, |
111 | bfd *, asection *, bfd_vma)); | |
112 | static boolean unattached_reloc PARAMS ((struct bfd_link_info *, | |
113 | const char *, bfd *, asection *, | |
114 | bfd_vma)); | |
115 | static boolean notice_ysym PARAMS ((struct bfd_link_info *, const char *, | |
116 | bfd *, asection *, bfd_vma)); | |
117 | ||
118 | static struct bfd_link_callbacks link_callbacks = | |
119 | { | |
120 | add_archive_element, | |
121 | multiple_definition, | |
122 | multiple_common, | |
123 | add_to_set, | |
124 | constructor_callback, | |
125 | warning_callback, | |
126 | undefined_symbol, | |
127 | reloc_overflow, | |
128 | reloc_dangerous, | |
129 | unattached_reloc, | |
130 | notice_ysym | |
131 | }; | |
132 | ||
133 | struct bfd_link_info link_info; | |
173a0c3d | 134 | \f |
9f629407 ILT |
135 | extern int main PARAMS ((int, char **)); |
136 | ||
137 | int | |
2fa0b342 | 138 | main (argc, argv) |
2fa0b342 | 139 | int argc; |
9f629407 | 140 | char **argv; |
2fa0b342 DHW |
141 | { |
142 | char *emulation; | |
8594f568 | 143 | long start_time = get_run_time (); |
e47bfa63 | 144 | |
2fa0b342 | 145 | program_name = argv[0]; |
99fe4553 | 146 | |
e47bfa63 | 147 | bfd_init (); |
bfbdc80f | 148 | |
2fa0b342 | 149 | /* Initialize the data about options. */ |
7b40f2b1 | 150 | trace_files = trace_file_tries = version_printed = false; |
2fa0b342 | 151 | write_map = false; |
b9395be3 | 152 | config.build_constructors = true; |
2fa0b342 DHW |
153 | command_line.force_common_definition = false; |
154 | ||
b9395be3 ILT |
155 | link_info.callbacks = &link_callbacks; |
156 | link_info.relocateable = false; | |
157 | link_info.strip = strip_none; | |
158 | link_info.discard = discard_none; | |
159 | link_info.lprefix_len = 1; | |
160 | link_info.lprefix = "L"; | |
161 | link_info.keep_memory = true; | |
162 | link_info.input_bfds = NULL; | |
163 | link_info.create_object_symbols_section = NULL; | |
164 | link_info.hash = NULL; | |
165 | link_info.keep_hash = NULL; | |
166 | link_info.notice_hash = NULL; | |
167 | ||
e47bfa63 | 168 | ldfile_add_arch (""); |
a72f4e5f | 169 | |
2fa0b342 DHW |
170 | config.make_executable = true; |
171 | force_make_executable = false; | |
ce4d59e2 SC |
172 | config.magic_demand_paged = true; |
173 | config.text_read_only = true; | |
2fa0b342 | 174 | config.make_executable = true; |
1418c83b | 175 | |
d723cd17 | 176 | emulation = get_emulation (argc, argv); |
e47bfa63 SC |
177 | ldemul_choose_mode (emulation); |
178 | default_target = ldemul_choose_target (); | |
179 | lang_init (); | |
180 | ldemul_before_parse (); | |
2fa0b342 | 181 | lang_has_input_file = false; |
e47bfa63 | 182 | parse_args (argc, argv); |
f3739bc3 | 183 | |
973e421e ILT |
184 | /* This essentially adds another -L directory so this must be done after |
185 | the -L's in argv have been processed. */ | |
186 | set_scripts_dir (); | |
187 | ||
bbd2521f DM |
188 | if (had_script == false) |
189 | { | |
190 | /* Read the emulation's appropriate default script. */ | |
2a28d8b0 DM |
191 | int isfile; |
192 | char *s = ldemul_get_script (&isfile); | |
193 | ||
194 | if (isfile) | |
195 | { | |
196 | /* sizeof counts the terminating NUL. */ | |
197 | size_t size = strlen (s) + sizeof ("-T "); | |
198 | char *buf = (char *) ldmalloc(size); | |
199 | sprintf (buf, "-T %s", s); | |
200 | parse_line (buf, 0); | |
201 | free (buf); | |
202 | } | |
203 | else | |
204 | parse_line (s, 1); | |
bbd2521f DM |
205 | } |
206 | ||
b9395be3 | 207 | if (link_info.relocateable && command_line.relax) |
29f33467 | 208 | { |
f3739bc3 | 209 | einfo ("%P%F: -relax and -r may not be used together\n"); |
29f33467 | 210 | } |
e47bfa63 | 211 | lang_final (); |
9d1fe8a4 | 212 | |
e47bfa63 SC |
213 | if (lang_has_input_file == false) |
214 | { | |
7b40f2b1 DM |
215 | if (version_printed) |
216 | exit (0); | |
973e421e | 217 | einfo ("%P%F: no input files\n"); |
870f54b2 | 218 | } |
2fa0b342 | 219 | |
bbd2521f DM |
220 | if (trace_files) |
221 | { | |
973e421e | 222 | info_msg ("%P: mode %s\n", emulation); |
bbd2521f DM |
223 | } |
224 | ||
e47bfa63 | 225 | ldemul_after_parse (); |
870f54b2 | 226 | |
9d1fe8a4 | 227 | |
e47bfa63 | 228 | if (config.map_filename) |
870f54b2 | 229 | { |
e47bfa63 | 230 | if (strcmp (config.map_filename, "-") == 0) |
2e2bf962 | 231 | { |
e47bfa63 | 232 | config.map_file = stdout; |
2e2bf962 | 233 | } |
e47bfa63 SC |
234 | else |
235 | { | |
236 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
237 | if (config.map_file == (FILE *) NULL) | |
238 | { | |
bbd2521f | 239 | einfo ("%P%F: cannot open map file %s: %E\n", |
e47bfa63 SC |
240 | config.map_filename); |
241 | } | |
242 | } | |
243 | } | |
870f54b2 | 244 | |
2e2bf962 | 245 | |
e47bfa63 | 246 | lang_process (); |
2fa0b342 | 247 | |
2fa0b342 DHW |
248 | /* Print error messages for any missing symbols, for any warning |
249 | symbols, and possibly multiple definitions */ | |
250 | ||
2fa0b342 | 251 | |
e47bfa63 SC |
252 | if (config.text_read_only) |
253 | { | |
254 | /* Look for a text section and mark the readonly attribute in it */ | |
255 | asection *found = bfd_get_section_by_name (output_bfd, ".text"); | |
256 | ||
257 | if (found != (asection *) NULL) | |
258 | { | |
259 | found->flags |= SEC_READONLY; | |
260 | } | |
3e4c643d | 261 | } |
2fa0b342 | 262 | |
b9395be3 | 263 | if (link_info.relocateable) |
f3739bc3 | 264 | output_bfd->flags &= ~EXEC_P; |
a72f4e5f | 265 | else |
f3739bc3 | 266 | output_bfd->flags |= EXEC_P; |
b257477f | 267 | |
f3739bc3 | 268 | ldwrite (); |
b257477f | 269 | |
f3739bc3 SC |
270 | /* Even if we're producing relocateable output, some non-fatal errors should |
271 | be reported in the exit status. (What non-fatal errors, if any, do we | |
272 | want to ignore for relocateable output?) */ | |
a72f4e5f | 273 | |
f3739bc3 SC |
274 | if (config.make_executable == false && force_make_executable == false) |
275 | { | |
276 | if (trace_files == true) | |
e47bfa63 | 277 | { |
973e421e | 278 | einfo ("%P: link errors found, deleting executable `%s'\n", |
f3739bc3 | 279 | output_filename); |
e47bfa63 | 280 | } |
a72f4e5f | 281 | |
f3739bc3 SC |
282 | if (output_bfd->iostream) |
283 | fclose ((FILE *) (output_bfd->iostream)); | |
a72f4e5f | 284 | |
f3739bc3 SC |
285 | unlink (output_filename); |
286 | exit (1); | |
287 | } | |
288 | else | |
289 | { | |
290 | bfd_close (output_bfd); | |
291 | } | |
2fa0b342 | 292 | |
b9395be3 ILT |
293 | if (config.stats) |
294 | { | |
295 | extern char **environ; | |
296 | char *lim = (char *) sbrk (0); | |
8594f568 | 297 | long run_time = get_run_time () - start_time; |
b9395be3 | 298 | |
8594f568 SS |
299 | fprintf (stderr, "%s: total time in link: %d.%06d\n", |
300 | program_name, run_time / 1000000, run_time % 1000000); | |
b9395be3 ILT |
301 | fprintf (stderr, "%s: data size %ld\n", program_name, |
302 | (long) (lim - (char *) &environ)); | |
303 | } | |
304 | ||
e47bfa63 | 305 | exit (0); |
9f629407 | 306 | return 0; |
d723cd17 DM |
307 | } |
308 | ||
309 | /* We need to find any explicitly given emulation in order to initialize the | |
310 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
311 | ||
312 | static char * | |
313 | get_emulation (argc, argv) | |
314 | int argc; | |
315 | char **argv; | |
316 | { | |
317 | char *emulation; | |
318 | int i; | |
319 | ||
d723cd17 DM |
320 | emulation = (char *) getenv (EMULATION_ENVIRON); |
321 | if (emulation == NULL) | |
322 | emulation = DEFAULT_EMULATION; | |
d723cd17 DM |
323 | |
324 | for (i = 1; i < argc; i++) | |
325 | { | |
326 | if (!strncmp (argv[i], "-m", 2)) | |
327 | { | |
328 | if (argv[i][2] == '\0') | |
329 | { | |
330 | /* -m EMUL */ | |
331 | if (i < argc - 1) | |
332 | { | |
333 | emulation = argv[i + 1]; | |
334 | i++; | |
335 | } | |
336 | else | |
337 | { | |
973e421e | 338 | einfo("%P%F: missing argument to -m\n"); |
d723cd17 DM |
339 | } |
340 | } | |
973e421e ILT |
341 | else if (strcmp (argv[i], "-mips1") == 0 |
342 | || strcmp (argv[i], "-mips2") == 0 | |
343 | || strcmp (argv[i], "-mips3") == 0) | |
344 | { | |
345 | /* FIXME: The arguments -mips1, -mips2 and -mips3 are | |
346 | passed to the linker by some MIPS compilers. They | |
347 | generally tell the linker to use a slightly different | |
348 | library path. Perhaps someday these should be | |
349 | implemented as emulations; until then, we just ignore | |
350 | the arguments and hope that nobody ever creates | |
351 | emulations named ips1, ips2 or ips3. */ | |
352 | } | |
d723cd17 DM |
353 | else |
354 | { | |
355 | /* -mEMUL */ | |
356 | emulation = &argv[i][2]; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | return emulation; | |
362 | } | |
363 | ||
364 | /* If directory DIR contains an "ldscripts" subdirectory, | |
365 | add DIR to the library search path and return true, | |
366 | else return false. */ | |
367 | ||
368 | static boolean | |
369 | check_for_scripts_dir (dir) | |
370 | char *dir; | |
371 | { | |
372 | size_t dirlen; | |
373 | char *buf; | |
374 | struct stat s; | |
375 | boolean res; | |
376 | ||
377 | dirlen = strlen (dir); | |
378 | /* sizeof counts the terminating NUL. */ | |
379 | buf = (char *) ldmalloc (dirlen + sizeof("/ldscripts")); | |
380 | sprintf (buf, "%s/ldscripts", dir); | |
381 | ||
382 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
f4208462 | 383 | free (buf); |
d723cd17 | 384 | if (res) |
f4208462 | 385 | ldfile_add_library_path (dir); |
d723cd17 DM |
386 | return res; |
387 | } | |
388 | ||
389 | /* Set the default directory for finding script files. | |
f4208462 DM |
390 | Libraries will be searched for here too, but that's ok. |
391 | We look for the "ldscripts" directory in: | |
392 | ||
f4208462 | 393 | SCRIPTDIR (passed from Makefile) |
bbd2521f DM |
394 | the dir where this program is (for using it from the build tree) |
395 | the dir where this program is/../lib (for installing the tool suite elsewhere) */ | |
d723cd17 DM |
396 | |
397 | static void | |
398 | set_scripts_dir () | |
399 | { | |
f4208462 DM |
400 | char *end, *dir; |
401 | size_t dirlen; | |
402 | ||
d723cd17 | 403 | if (check_for_scripts_dir (SCRIPTDIR)) |
f4208462 | 404 | return; /* We've been installed normally. */ |
d723cd17 DM |
405 | |
406 | /* Look for "ldscripts" in the dir where our binary is. */ | |
407 | end = strrchr (program_name, '/'); | |
bbd2521f DM |
408 | if (end) |
409 | { | |
410 | dirlen = end - program_name; | |
411 | /* Make a copy of program_name in dir. | |
412 | Leave room for later "/../lib". */ | |
413 | dir = (char *) ldmalloc (dirlen + 8); | |
414 | strncpy (dir, program_name, dirlen); | |
415 | dir[dirlen] = '\0'; | |
416 | } | |
417 | else | |
418 | { | |
419 | dirlen = 1; | |
420 | dir = (char *) ldmalloc (dirlen + 8); | |
421 | strcpy (dir, "."); | |
422 | } | |
f4208462 | 423 | |
f4208462 DM |
424 | if (check_for_scripts_dir (dir)) |
425 | return; /* Don't free dir. */ | |
426 | ||
427 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
428 | strcpy (dir + dirlen, "/../lib"); | |
429 | if (check_for_scripts_dir (dir)) | |
430 | return; | |
431 | ||
432 | free (dir); /* Well, we tried. */ | |
d723cd17 | 433 | } |
2fa0b342 | 434 | |
e47bfa63 | 435 | void |
b9395be3 ILT |
436 | add_ysym (name) |
437 | const char *name; | |
2fa0b342 | 438 | { |
b9395be3 ILT |
439 | if (link_info.notice_hash == (struct bfd_hash_table *) NULL) |
440 | { | |
441 | link_info.notice_hash = ((struct bfd_hash_table *) | |
442 | ldmalloc (sizeof (struct bfd_hash_table))); | |
443 | if (! bfd_hash_table_init_n (link_info.notice_hash, | |
444 | bfd_hash_newfunc, | |
445 | 61)) | |
446 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
447 | } | |
448 | ||
449 | if (bfd_hash_lookup (link_info.notice_hash, name, true, true) | |
450 | == (struct bfd_hash_entry *) NULL) | |
451 | einfo ("%P%F: bfd_hash_lookup failed: %E\n"); | |
2fa0b342 | 452 | } |
e47bfa63 | 453 | |
b9395be3 | 454 | /* Handle the -retain-symbols-file option. */ |
2fa0b342 | 455 | |
2fa0b342 | 456 | void |
b9395be3 ILT |
457 | add_keepsyms_file (filename) |
458 | const char *filename; | |
2fa0b342 | 459 | { |
b9395be3 ILT |
460 | FILE *file; |
461 | char *buf; | |
462 | size_t bufsize; | |
463 | int c; | |
2fa0b342 | 464 | |
b9395be3 ILT |
465 | if (link_info.strip == strip_some) |
466 | einfo ("%X%P: error: duplicate retain-symbols-file\n"); | |
3e4c643d | 467 | |
b9395be3 ILT |
468 | file = fopen (filename, "r"); |
469 | if (file == (FILE *) NULL) | |
e47bfa63 | 470 | { |
b9395be3 ILT |
471 | bfd_error = system_call_error; |
472 | einfo ("%X%P: %s: %E", filename); | |
473 | return; | |
be1627d3 | 474 | } |
be1627d3 | 475 | |
b9395be3 ILT |
476 | link_info.keep_hash = ((struct bfd_hash_table *) |
477 | ldmalloc (sizeof (struct bfd_hash_table))); | |
478 | if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) | |
479 | einfo ("%P%F: bfd_hash_table_init failed: %E\n"); | |
2fa0b342 | 480 | |
b9395be3 ILT |
481 | bufsize = 100; |
482 | buf = (char *) ldmalloc (bufsize); | |
c611e285 | 483 | |
b9395be3 ILT |
484 | c = getc (file); |
485 | while (c != EOF) | |
29f33467 | 486 | { |
b9395be3 ILT |
487 | while (isspace (c)) |
488 | c = getc (file); | |
e47bfa63 | 489 | |
b9395be3 | 490 | if (c != EOF) |
29f33467 | 491 | { |
b9395be3 | 492 | size_t len = 0; |
8a045e50 | 493 | |
b9395be3 | 494 | while (! isspace (c) && c != EOF) |
29f33467 | 495 | { |
b9395be3 ILT |
496 | buf[len] = c; |
497 | ++len; | |
498 | if (len >= bufsize) | |
29f33467 | 499 | { |
b9395be3 ILT |
500 | bufsize *= 2; |
501 | buf = ldrealloc (buf, bufsize); | |
29f33467 | 502 | } |
b9395be3 | 503 | c = getc (file); |
29f33467 | 504 | } |
81016051 | 505 | |
b9395be3 ILT |
506 | buf[len] = '\0'; |
507 | ||
508 | if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) | |
509 | == (struct bfd_hash_entry *) NULL) | |
510 | einfo ("%P%F: bfd_hash_lookup for insertion failed: %E"); | |
29f33467 | 511 | } |
e47bfa63 | 512 | } |
2fa0b342 | 513 | |
b9395be3 ILT |
514 | if (link_info.strip != strip_none) |
515 | einfo ("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"); | |
8a045e50 | 516 | |
b9395be3 ILT |
517 | link_info.strip = strip_some; |
518 | } | |
519 | \f | |
520 | /* Callbacks from the BFD linker routines. */ | |
2fa0b342 | 521 | |
b9395be3 ILT |
522 | /* This is called when BFD has decided to include an archive member in |
523 | a link. */ | |
2fa0b342 | 524 | |
b9395be3 ILT |
525 | /*ARGSUSED*/ |
526 | static boolean | |
527 | add_archive_element (info, abfd, name) | |
528 | struct bfd_link_info *info; | |
529 | bfd *abfd; | |
530 | const char *name; | |
2fa0b342 | 531 | { |
b9395be3 ILT |
532 | lang_input_statement_type *input; |
533 | ||
534 | input = ((lang_input_statement_type *) | |
535 | ldmalloc ((bfd_size_type) sizeof (lang_input_statement_type))); | |
536 | input->filename = abfd->filename; | |
537 | input->local_sym_name = abfd->filename; | |
538 | input->the_bfd = abfd; | |
539 | input->asymbols = NULL; | |
540 | input->subfiles = NULL; | |
541 | input->next = NULL; | |
542 | input->just_syms_flag = false; | |
543 | input->loaded = false; | |
544 | input->chain = NULL; | |
545 | ||
546 | /* FIXME: This is wrong. It should point to an entry for the | |
547 | archive itself. However, it doesn't seem to matter. */ | |
548 | input->superfile = NULL; | |
549 | ||
550 | /* FIXME: The following fields are not set: header.next, | |
551 | header.type, closed, passive_position, symbol_count, total_size, | |
552 | next_real_file, is_archive, search_dirs_flag, target, real, | |
553 | common_section, common_output_section, complained. This bit of | |
554 | code is from the old decode_library_subfile function. I don't | |
555 | know whether any of those fields matters. */ | |
556 | ||
557 | ldlang_add_file (input); | |
558 | ||
559 | if (write_map) | |
560 | info_msg ("%s needed due to %T\n", abfd->filename, name); | |
561 | ||
5dad4c97 ILT |
562 | if (trace_files || trace_file_tries) |
563 | info_msg ("%I\n", input); | |
564 | ||
b9395be3 ILT |
565 | return true; |
566 | } | |
2fa0b342 | 567 | |
b9395be3 ILT |
568 | /* This is called when BFD has discovered a symbol which is defined |
569 | multiple times. */ | |
2fa0b342 | 570 | |
b9395be3 ILT |
571 | /*ARGSUSED*/ |
572 | static boolean | |
573 | multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) | |
574 | struct bfd_link_info *info; | |
575 | const char *name; | |
576 | bfd *obfd; | |
577 | asection *osec; | |
578 | bfd_vma oval; | |
579 | bfd *nbfd; | |
580 | asection *nsec; | |
581 | bfd_vma nval; | |
582 | { | |
583 | einfo ("%X%C: multiple definition of `%T'\n", | |
584 | nbfd, nsec, nval, name); | |
585 | if (obfd != (bfd *) NULL) | |
586 | einfo ("%C: first defined here\n", obfd, osec, oval); | |
587 | return true; | |
2fa0b342 DHW |
588 | } |
589 | ||
b9395be3 ILT |
590 | /* This is called when there is a definition of a common symbol, or |
591 | when a common symbol is found for a symbol that is already defined, | |
592 | or when two common symbols are found. We only do something if | |
593 | -warn-common was used. */ | |
594 | ||
595 | /*ARGSUSED*/ | |
596 | static boolean | |
597 | multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) | |
598 | struct bfd_link_info *info; | |
599 | const char *name; | |
600 | bfd *obfd; | |
601 | enum bfd_link_hash_type otype; | |
602 | bfd_vma osize; | |
603 | bfd *nbfd; | |
604 | enum bfd_link_hash_type ntype; | |
605 | bfd_vma nsize; | |
99fe4553 | 606 | { |
b9395be3 ILT |
607 | if (! config.warn_common) |
608 | return true; | |
99fe4553 | 609 | |
b9395be3 | 610 | if (ntype == bfd_link_hash_defined) |
e47bfa63 | 611 | { |
b9395be3 ILT |
612 | ASSERT (otype == bfd_link_hash_common); |
613 | einfo ("%B: warning: definition of `%T' overriding common\n", | |
614 | nbfd, name); | |
615 | einfo ("%B: warning: common is here\n", obfd); | |
e47bfa63 | 616 | } |
b9395be3 | 617 | else if (otype == bfd_link_hash_defined) |
2fa0b342 | 618 | { |
b9395be3 ILT |
619 | ASSERT (ntype == bfd_link_hash_common); |
620 | einfo ("%B: warning: common of `%T' overridden by definition\n", | |
621 | nbfd, name); | |
622 | einfo ("%B: warning: defined here\n", obfd); | |
623 | } | |
624 | else | |
625 | { | |
626 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
627 | if (osize > nsize) | |
2fa0b342 | 628 | { |
b9395be3 ILT |
629 | einfo ("%B: warning: common of `%T' overridden by larger common\n", |
630 | nbfd, name); | |
631 | einfo ("%B: warning: larger common is here\n", obfd); | |
2fa0b342 | 632 | } |
b9395be3 | 633 | else if (nsize > osize) |
2fa0b342 | 634 | { |
b9395be3 ILT |
635 | einfo ("%B: warning: common of `%T' overriding smaller common\n", |
636 | nbfd, name); | |
637 | einfo ("%B: warning: smaller common is here\n", obfd); | |
2fa0b342 | 638 | } |
e47bfa63 | 639 | else |
2fa0b342 | 640 | { |
b9395be3 ILT |
641 | einfo ("%B: warning: multiple common of `%T'\n", nbfd, name); |
642 | einfo ("%B: warning: previous common is here\n", obfd); | |
2fa0b342 DHW |
643 | } |
644 | } | |
645 | ||
b9395be3 | 646 | return true; |
2fa0b342 DHW |
647 | } |
648 | ||
b9395be3 ILT |
649 | /* This is called when BFD has discovered a set element. H is the |
650 | entry in the linker hash table for the set. SECTION and VALUE | |
651 | represent a value which should be added to the set. */ | |
2fa0b342 | 652 | |
b9395be3 ILT |
653 | /*ARGSUSED*/ |
654 | static boolean | |
655 | add_to_set (info, h, bitsize, abfd, section, value) | |
656 | struct bfd_link_info *info; | |
657 | struct bfd_link_hash_entry *h; | |
658 | unsigned int bitsize; | |
659 | bfd *abfd; | |
660 | asection *section; | |
661 | bfd_vma value; | |
2fa0b342 | 662 | { |
b9395be3 ILT |
663 | ldctor_add_set_entry (h, bitsize, section, value); |
664 | return true; | |
665 | } | |
1418c83b | 666 | |
b9395be3 ILT |
667 | /* This is called when BFD has discovered a constructor. This is only |
668 | called for some object file formats--those which do not handle | |
669 | constructors in some more clever fashion. This is similar to | |
670 | adding an element to a set, but less general. */ | |
2fa0b342 | 671 | |
b9395be3 ILT |
672 | static boolean |
673 | constructor_callback (info, constructor, bitsize, name, abfd, section, value) | |
674 | struct bfd_link_info *info; | |
675 | boolean constructor; | |
676 | unsigned int bitsize; | |
677 | const char *name; | |
678 | bfd *abfd; | |
679 | asection *section; | |
680 | bfd_vma value; | |
681 | { | |
682 | char *set_name; | |
683 | char *s; | |
684 | struct bfd_link_hash_entry *h; | |
685 | ||
686 | if (! config.build_constructors) | |
687 | return true; | |
688 | ||
689 | set_name = (char *) alloca (1 + sizeof "__CTOR_LIST__"); | |
690 | s = set_name; | |
691 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
692 | *s++ = bfd_get_symbol_leading_char (abfd); | |
693 | if (constructor) | |
694 | strcpy (s, "__CTOR_LIST__"); | |
29f33467 | 695 | else |
b9395be3 | 696 | strcpy (s, "__DTOR_LIST__"); |
2fa0b342 | 697 | |
b9395be3 ILT |
698 | if (write_map) |
699 | info_msg ("Adding %s to constructor/destructor set %s\n", name, set_name); | |
e47bfa63 | 700 | |
b9395be3 ILT |
701 | h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); |
702 | if (h == (struct bfd_link_hash_entry *) NULL) | |
703 | einfo ("%P%F: bfd_link_hash_lookup failed: %E"); | |
704 | if (h->type == bfd_link_hash_new) | |
e47bfa63 | 705 | { |
b9395be3 ILT |
706 | h->type = bfd_link_hash_undefined; |
707 | h->u.undef.abfd = abfd; | |
708 | /* We don't call bfd_link_add_undef to add this to the list of | |
709 | undefined symbols because we are going to define it | |
710 | ourselves. */ | |
2fa0b342 | 711 | } |
2fa0b342 | 712 | |
b9395be3 ILT |
713 | ldctor_add_set_entry (h, bitsize, section, value); |
714 | return true; | |
2fa0b342 DHW |
715 | } |
716 | ||
b9395be3 | 717 | /* This is called when there is a reference to a warning symbol. */ |
2fa0b342 | 718 | |
b9395be3 ILT |
719 | /*ARGSUSED*/ |
720 | static boolean | |
721 | warning_callback (info, warning) | |
722 | struct bfd_link_info *info; | |
723 | const char *warning; | |
2fa0b342 | 724 | { |
b9395be3 ILT |
725 | einfo ("%P: %s\n", warning); |
726 | return true; | |
2fa0b342 DHW |
727 | } |
728 | ||
b9395be3 | 729 | /* This is called when an undefined symbol is found. */ |
2fa0b342 | 730 | |
b9395be3 ILT |
731 | /*ARGSUSED*/ |
732 | static boolean | |
733 | undefined_symbol (info, name, abfd, section, address) | |
734 | struct bfd_link_info *info; | |
735 | const char *name; | |
736 | bfd *abfd; | |
737 | asection *section; | |
738 | bfd_vma address; | |
739 | { | |
740 | static char *error_name; | |
741 | static unsigned int error_count; | |
29f33467 | 742 | |
b9395be3 | 743 | #define MAX_ERRORS_IN_A_ROW 5 |
8a045e50 | 744 | |
b9395be3 ILT |
745 | /* We never print more than a reasonable number of errors in a row |
746 | for a single symbol. */ | |
747 | if (error_name != (char *) NULL | |
748 | && strcmp (name, error_name) == 0) | |
749 | ++error_count; | |
750 | else | |
e47bfa63 | 751 | { |
b9395be3 ILT |
752 | error_count = 0; |
753 | if (error_name != (char *) NULL) | |
754 | free (error_name); | |
755 | error_name = buystring (name); | |
756 | } | |
2fa0b342 | 757 | |
b9395be3 ILT |
758 | if (error_count < MAX_ERRORS_IN_A_ROW) |
759 | einfo ("%X%C: undefined reference to `%T'\n", | |
760 | abfd, section, address, name); | |
761 | else if (error_count == MAX_ERRORS_IN_A_ROW) | |
762 | einfo ("%C: more undefined references to `%T' follow\n", | |
763 | abfd, section, address, name); | |
2fa0b342 | 764 | |
b9395be3 | 765 | return true; |
2fa0b342 DHW |
766 | } |
767 | ||
b9395be3 | 768 | /* This is called when a reloc overflows. */ |
2fa0b342 | 769 | |
b9395be3 | 770 | /*ARGSUSED*/ |
9f629407 | 771 | static boolean |
5dad4c97 | 772 | reloc_overflow (info, name, reloc_name, addend, abfd, section, address) |
b9395be3 | 773 | struct bfd_link_info *info; |
5dad4c97 ILT |
774 | const char *name; |
775 | const char *reloc_name; | |
776 | bfd_vma addend; | |
b9395be3 ILT |
777 | bfd *abfd; |
778 | asection *section; | |
779 | bfd_vma address; | |
2fa0b342 | 780 | { |
5dad4c97 ILT |
781 | einfo ("%X%C: relocation truncated to fit: %s %T", abfd, section, |
782 | address, reloc_name, name); | |
783 | if (addend != 0) | |
784 | einfo ("+%v", addend); | |
785 | einfo ("\n"); | |
b9395be3 ILT |
786 | return true; |
787 | } | |
2fa0b342 | 788 | |
b9395be3 | 789 | /* This is called when a dangerous relocation is made. */ |
3e4c643d | 790 | |
b9395be3 ILT |
791 | /*ARGSUSED*/ |
792 | static boolean | |
793 | reloc_dangerous (info, message, abfd, section, address) | |
794 | struct bfd_link_info *info; | |
795 | const char *message; | |
796 | bfd *abfd; | |
797 | asection *section; | |
798 | bfd_vma address; | |
799 | { | |
800 | einfo ("%X%C: dangerous relocation: %s\n", abfd, section, address, message); | |
801 | return true; | |
802 | } | |
973e421e | 803 | |
b9395be3 ILT |
804 | /* This is called when a reloc is being generated attached to a symbol |
805 | that is not being output. */ | |
2fa0b342 | 806 | |
b9395be3 ILT |
807 | /*ARGSUSED*/ |
808 | static boolean | |
809 | unattached_reloc (info, name, abfd, section, address) | |
810 | struct bfd_link_info *info; | |
811 | const char *name; | |
812 | bfd *abfd; | |
813 | asection *section; | |
814 | bfd_vma address; | |
815 | { | |
816 | einfo ("%X%C: reloc refers to symbol `%T' which is not being output\n", | |
817 | abfd, section, address, name); | |
818 | return true; | |
2fa0b342 | 819 | } |
8a045e50 | 820 | |
b9395be3 ILT |
821 | /* This is called when a symbol in notice_hash is found. Symbols are |
822 | put in notice_hash using the -y option. */ | |
823 | ||
824 | /*ARGSUSED*/ | |
825 | static boolean | |
826 | notice_ysym (info, name, abfd, section, value) | |
827 | struct bfd_link_info *info; | |
828 | const char *name; | |
829 | bfd *abfd; | |
830 | asection *section; | |
831 | bfd_vma value; | |
8a045e50 | 832 | { |
b9395be3 ILT |
833 | einfo ("%B: %s %s\n", abfd, |
834 | section != &bfd_und_section ? "definition of" : "reference to", | |
835 | name); | |
836 | return true; | |
8a045e50 | 837 | } |