Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Main program of GNU linker. |
4e5bae56 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
66eb6687 | 3 | 2002, 2003, 2004, 2005, 2006 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Steve Chamberlain steve@cygnus.com | |
6 | ||
2fa9fc65 | 7 | This file is part of GLD, the Gnu Linker. |
252b5132 | 8 | |
2fa9fc65 NC |
9 | GLD is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
252b5132 | 13 | |
2fa9fc65 NC |
14 | GLD is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
252b5132 | 18 | |
2fa9fc65 NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with GLD; see the file COPYING. If not, write to the Free | |
75be928b NC |
21 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
22 | 02110-1301, USA. */ | |
252b5132 RH |
23 | |
24 | #include "bfd.h" | |
25 | #include "sysdep.h" | |
26 | #include <stdio.h> | |
3882b010 | 27 | #include "safe-ctype.h" |
252b5132 RH |
28 | #include "libiberty.h" |
29 | #include "progress.h" | |
30 | #include "bfdlink.h" | |
5af11cab | 31 | #include "filenames.h" |
252b5132 RH |
32 | |
33 | #include "ld.h" | |
34 | #include "ldmain.h" | |
35 | #include "ldmisc.h" | |
36 | #include "ldwrite.h" | |
252b5132 RH |
37 | #include "ldexp.h" |
38 | #include "ldlang.h" | |
df2a7313 | 39 | #include <ldgram.h> |
252b5132 RH |
40 | #include "ldlex.h" |
41 | #include "ldfile.h" | |
b71e2778 | 42 | #include "ldemul.h" |
252b5132 RH |
43 | #include "ldctor.h" |
44 | ||
0125cdf2 | 45 | /* Somewhere above, sys/stat.h got included. */ |
252b5132 RH |
46 | #if !defined(S_ISDIR) && defined(S_IFDIR) |
47 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
48 | #endif | |
49 | ||
50 | #include <string.h> | |
51 | ||
52 | #ifdef HAVE_SBRK | |
502bdb00 | 53 | #if !HAVE_DECL_SBRK |
1579bae1 | 54 | extern void *sbrk (); |
252b5132 RH |
55 | #endif |
56 | #endif | |
57 | ||
9c8ebd6a DJ |
58 | #ifndef TARGET_SYSTEM_ROOT |
59 | #define TARGET_SYSTEM_ROOT "" | |
60 | #endif | |
61 | ||
252b5132 RH |
62 | /* EXPORTS */ |
63 | ||
64 | char *default_target; | |
65 | const char *output_filename = "a.out"; | |
66 | ||
67 | /* Name this program was invoked by. */ | |
68 | char *program_name; | |
69 | ||
9c8ebd6a | 70 | /* The prefix for system library directories. */ |
e2243057 | 71 | const char *ld_sysroot; |
9c8ebd6a | 72 | |
3fe38064 NC |
73 | /* The canonical representation of ld_sysroot. */ |
74 | char * ld_canon_sysroot; | |
75 | int ld_canon_sysroot_len; | |
76 | ||
6d5e62f8 | 77 | /* The file that we're creating. */ |
252b5132 RH |
78 | bfd *output_bfd = 0; |
79 | ||
80 | /* Set by -G argument, for MIPS ECOFF target. */ | |
81 | int g_switch_value = 8; | |
82 | ||
83 | /* Nonzero means print names of input files as processed. */ | |
b34976b6 | 84 | bfd_boolean trace_files; |
252b5132 RH |
85 | |
86 | /* Nonzero means same, but note open failures, too. */ | |
b34976b6 | 87 | bfd_boolean trace_file_tries; |
252b5132 RH |
88 | |
89 | /* Nonzero means version number was printed, so exit successfully | |
90 | instead of complaining if no input files are given. */ | |
b34976b6 | 91 | bfd_boolean version_printed; |
252b5132 RH |
92 | |
93 | /* Nonzero means link in every member of an archive. */ | |
b34976b6 | 94 | bfd_boolean whole_archive; |
252b5132 | 95 | |
4a43e768 AM |
96 | /* Nonzero means create DT_NEEDED entries only if a dynamic library |
97 | actually satisfies some reference in a regular object. */ | |
98 | bfd_boolean as_needed; | |
99 | ||
e56f61be L |
100 | /* Nonzero means never create DT_NEEDED entries for dynamic libraries |
101 | in DT_NEEDED tags. */ | |
102 | bfd_boolean add_needed = TRUE; | |
103 | ||
b34976b6 AM |
104 | /* TRUE if we should demangle symbol names. */ |
105 | bfd_boolean demangling; | |
252b5132 RH |
106 | |
107 | args_type command_line; | |
108 | ||
109 | ld_config_type config; | |
110 | ||
bcaa7b3e L |
111 | sort_type sort_section; |
112 | ||
e2243057 RS |
113 | static const char *get_sysroot |
114 | (int, char **); | |
0125cdf2 | 115 | static char *get_emulation |
1579bae1 | 116 | (int, char **); |
0125cdf2 | 117 | static void set_scripts_dir |
1579bae1 | 118 | (void); |
0125cdf2 | 119 | static bfd_boolean add_archive_element |
1579bae1 | 120 | (struct bfd_link_info *, bfd *, const char *); |
0125cdf2 | 121 | static bfd_boolean multiple_definition |
1579bae1 AM |
122 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
123 | bfd *, asection *, bfd_vma); | |
0125cdf2 | 124 | static bfd_boolean multiple_common |
1579bae1 AM |
125 | (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, |
126 | bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma); | |
0125cdf2 | 127 | static bfd_boolean add_to_set |
1579bae1 AM |
128 | (struct bfd_link_info *, struct bfd_link_hash_entry *, |
129 | bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); | |
0125cdf2 | 130 | static bfd_boolean constructor_callback |
1579bae1 AM |
131 | (struct bfd_link_info *, bfd_boolean, const char *, bfd *, |
132 | asection *, bfd_vma); | |
0125cdf2 | 133 | static bfd_boolean warning_callback |
1579bae1 AM |
134 | (struct bfd_link_info *, const char *, const char *, bfd *, |
135 | asection *, bfd_vma); | |
0125cdf2 | 136 | static void warning_find_reloc |
1579bae1 | 137 | (bfd *, asection *, void *); |
0125cdf2 | 138 | static bfd_boolean undefined_symbol |
1579bae1 AM |
139 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, |
140 | bfd_boolean); | |
0125cdf2 | 141 | static bfd_boolean reloc_overflow |
dfeffb9f L |
142 | (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, |
143 | const char *, bfd_vma, bfd *, asection *, bfd_vma); | |
0125cdf2 | 144 | static bfd_boolean reloc_dangerous |
1579bae1 | 145 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 146 | static bfd_boolean unattached_reloc |
1579bae1 | 147 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 | 148 | static bfd_boolean notice |
1579bae1 | 149 | (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); |
0125cdf2 NC |
150 | |
151 | static struct bfd_link_callbacks link_callbacks = | |
152 | { | |
252b5132 RH |
153 | add_archive_element, |
154 | multiple_definition, | |
155 | multiple_common, | |
156 | add_to_set, | |
157 | constructor_callback, | |
158 | warning_callback, | |
159 | undefined_symbol, | |
160 | reloc_overflow, | |
161 | reloc_dangerous, | |
162 | unattached_reloc, | |
e1fffbe6 AM |
163 | notice, |
164 | einfo | |
252b5132 RH |
165 | }; |
166 | ||
167 | struct bfd_link_info link_info; | |
168 | \f | |
169 | static void | |
1579bae1 | 170 | remove_output (void) |
252b5132 | 171 | { |
6d5e62f8 | 172 | if (output_filename) |
252b5132 | 173 | { |
c92c35e7 AC |
174 | if (output_bfd) |
175 | bfd_cache_close (output_bfd); | |
252b5132 | 176 | if (delete_output_file_on_failure) |
bb14f524 | 177 | unlink_if_ordinary (output_filename); |
252b5132 RH |
178 | } |
179 | } | |
180 | ||
181 | int | |
1579bae1 | 182 | main (int argc, char **argv) |
252b5132 RH |
183 | { |
184 | char *emulation; | |
185 | long start_time = get_run_time (); | |
186 | ||
187 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
188 | setlocale (LC_MESSAGES, ""); | |
3882b010 L |
189 | #endif |
190 | #if defined (HAVE_SETLOCALE) | |
191 | setlocale (LC_CTYPE, ""); | |
252b5132 RH |
192 | #endif |
193 | bindtextdomain (PACKAGE, LOCALEDIR); | |
194 | textdomain (PACKAGE); | |
195 | ||
196 | program_name = argv[0]; | |
197 | xmalloc_set_program_name (program_name); | |
198 | ||
199 | START_PROGRESS (program_name, 0); | |
200 | ||
869b9d07 MM |
201 | expandargv (&argc, &argv); |
202 | ||
252b5132 RH |
203 | bfd_init (); |
204 | ||
205 | bfd_set_error_program_name (program_name); | |
206 | ||
207 | xatexit (remove_output); | |
208 | ||
e2243057 RS |
209 | /* Set up the sysroot directory. */ |
210 | ld_sysroot = get_sysroot (argc, argv); | |
211 | if (*ld_sysroot) | |
9c8ebd6a | 212 | { |
e2243057 | 213 | if (*TARGET_SYSTEM_ROOT == 0) |
9c8ebd6a | 214 | { |
70487fb2 | 215 | einfo ("%P%F: this linker was not configured to use sysroots\n"); |
e2243057 | 216 | ld_sysroot = ""; |
0125cdf2 | 217 | } |
e2243057 RS |
218 | else |
219 | ld_canon_sysroot = lrealpath (ld_sysroot); | |
0125cdf2 | 220 | } |
3fe38064 NC |
221 | if (ld_canon_sysroot) |
222 | ld_canon_sysroot_len = strlen (ld_canon_sysroot); | |
223 | else | |
224 | ld_canon_sysroot_len = -1; | |
225 | ||
252b5132 RH |
226 | /* Set the default BFD target based on the configured target. Doing |
227 | this permits the linker to be configured for a particular target, | |
228 | and linked against a shared BFD library which was configured for | |
229 | a different target. The macro TARGET is defined by Makefile. */ | |
230 | if (! bfd_set_default_target (TARGET)) | |
231 | { | |
232 | einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); | |
233 | xexit (1); | |
234 | } | |
235 | ||
b47c4208 AM |
236 | #if YYDEBUG |
237 | { | |
238 | extern int yydebug; | |
239 | yydebug = 1; | |
240 | } | |
241 | #endif | |
242 | ||
252b5132 | 243 | /* Initialize the data about options. */ |
b34976b6 AM |
244 | trace_files = trace_file_tries = version_printed = FALSE; |
245 | whole_archive = FALSE; | |
246 | config.build_constructors = TRUE; | |
247 | config.dynamic_link = FALSE; | |
248 | config.has_shared = FALSE; | |
a854a4a7 AM |
249 | config.split_by_reloc = (unsigned) -1; |
250 | config.split_by_file = (bfd_size_type) -1; | |
2d643429 | 251 | config.hash_table_size = 0; |
b34976b6 AM |
252 | command_line.force_common_definition = FALSE; |
253 | command_line.inhibit_common_definition = FALSE; | |
252b5132 RH |
254 | command_line.interpreter = NULL; |
255 | command_line.rpath = NULL; | |
b34976b6 AM |
256 | command_line.warn_mismatch = TRUE; |
257 | command_line.check_section_addresses = TRUE; | |
312b768e | 258 | command_line.accept_unknown_input_arch = FALSE; |
35835446 | 259 | command_line.reduce_memory_overheads = FALSE; |
252b5132 | 260 | |
bcaa7b3e L |
261 | sort_section = none; |
262 | ||
252b5132 RH |
263 | /* We initialize DEMANGLING based on the environment variable |
264 | COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the | |
265 | output of the linker, unless COLLECT_NO_DEMANGLE is set in the | |
266 | environment. Acting the same way here lets us provide the same | |
267 | interface by default. */ | |
268 | demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; | |
269 | ||
1049f94e | 270 | link_info.relocatable = FALSE; |
b34976b6 | 271 | link_info.emitrelocations = FALSE; |
b5067602 | 272 | link_info.task_link = FALSE; |
b34976b6 | 273 | link_info.shared = FALSE; |
36af4a4e JJ |
274 | link_info.pie = FALSE; |
275 | link_info.executable = FALSE; | |
b34976b6 AM |
276 | link_info.symbolic = FALSE; |
277 | link_info.export_dynamic = FALSE; | |
278 | link_info.static_link = FALSE; | |
279 | link_info.traditional_format = FALSE; | |
280 | link_info.optimize = FALSE; | |
560e09e9 NC |
281 | link_info.unresolved_syms_in_objects = RM_NOT_YET_SET; |
282 | link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET; | |
b34976b6 AM |
283 | link_info.allow_multiple_definition = FALSE; |
284 | link_info.allow_undefined_version = TRUE; | |
3e3b46e5 | 285 | link_info.create_default_symver = FALSE; |
fc0e6df6 | 286 | link_info.default_imported_symver = FALSE; |
b5067602 AM |
287 | link_info.keep_memory = TRUE; |
288 | link_info.notice_all = FALSE; | |
289 | link_info.nocopyreloc = FALSE; | |
290 | link_info.new_dtags = FALSE; | |
291 | link_info.combreloc = TRUE; | |
292 | link_info.eh_frame_hdr = FALSE; | |
8c37241b | 293 | link_info.relro = FALSE; |
d5cd3933 | 294 | link_info.strip_discarded = TRUE; |
252b5132 | 295 | link_info.strip = strip_none; |
f5fa8ca2 | 296 | link_info.discard = discard_sec_merge; |
b5067602 AM |
297 | link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; |
298 | link_info.callbacks = &link_callbacks; | |
252b5132 RH |
299 | link_info.hash = NULL; |
300 | link_info.keep_hash = NULL; | |
252b5132 RH |
301 | link_info.notice_hash = NULL; |
302 | link_info.wrap_hash = NULL; | |
b5067602 AM |
303 | link_info.input_bfds = NULL; |
304 | link_info.create_object_symbols_section = NULL; | |
305 | link_info.gc_sym_list = NULL; | |
306 | link_info.base_file = NULL; | |
fdc90cb4 JJ |
307 | link_info.emit_hash = TRUE; |
308 | link_info.emit_gnu_hash = FALSE; | |
3dbf70a2 MM |
309 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
310 | and _fini symbols. We are compatible. */ | |
311 | link_info.init_function = "_init"; | |
312 | link_info.fini_function = "_fini"; | |
e0076ab3 | 313 | link_info.pei386_auto_import = -1; |
b34976b6 | 314 | link_info.pei386_runtime_pseudo_reloc = FALSE; |
db6751f2 | 315 | link_info.spare_dynamic_tags = 5; |
1579bae1 AM |
316 | link_info.flags = 0; |
317 | link_info.flags_1 = 0; | |
fbbc3759 | 318 | link_info.relax_pass = 1; |
8fdd7217 | 319 | link_info.warn_shared_textrel = FALSE; |
57316bff | 320 | link_info.gc_sections = FALSE; |
3dbf70a2 | 321 | |
24718e3b L |
322 | config.maxpagesize = 0; |
323 | config.commonpagesize = 0; | |
324 | ||
252b5132 RH |
325 | ldfile_add_arch (""); |
326 | ||
b34976b6 AM |
327 | config.make_executable = TRUE; |
328 | force_make_executable = FALSE; | |
329 | config.magic_demand_paged = TRUE; | |
330 | config.text_read_only = TRUE; | |
252b5132 RH |
331 | |
332 | emulation = get_emulation (argc, argv); | |
333 | ldemul_choose_mode (emulation); | |
742aeb63 | 334 | default_target = ldemul_choose_target (argc, argv); |
252b5132 RH |
335 | lang_init (); |
336 | ldemul_before_parse (); | |
b34976b6 | 337 | lang_has_input_file = FALSE; |
252b5132 RH |
338 | parse_args (argc, argv); |
339 | ||
2d643429 NC |
340 | if (config.hash_table_size != 0) |
341 | bfd_hash_set_default_size (config.hash_table_size); | |
342 | ||
24718e3b L |
343 | if (config.maxpagesize != 0) |
344 | bfd_emul_set_maxpagesize (default_target, config.maxpagesize); | |
345 | ||
346 | if (config.commonpagesize != 0) | |
347 | bfd_emul_set_commonpagesize (default_target, | |
348 | config.commonpagesize); | |
349 | ||
252b5132 RH |
350 | ldemul_set_symbols (); |
351 | ||
1049f94e | 352 | if (link_info.relocatable) |
252b5132 | 353 | { |
57316bff | 354 | if (link_info.gc_sections) |
252b5132 | 355 | einfo ("%P%F: --gc-sections and -r may not be used together\n"); |
252b5132 RH |
356 | else if (command_line.relax) |
357 | einfo (_("%P%F: --relax and -r may not be used together\n")); | |
358 | if (link_info.shared) | |
359 | einfo (_("%P%F: -r and -shared may not be used together\n")); | |
360 | } | |
361 | ||
7333607e JJ |
362 | if (! link_info.shared) |
363 | { | |
364 | if (command_line.filter_shlib) | |
e97cb84f | 365 | einfo (_("%P%F: -F may not be used without -shared\n")); |
7333607e | 366 | if (command_line.auxiliary_filters) |
e97cb84f | 367 | einfo (_("%P%F: -f may not be used without -shared\n")); |
7333607e JJ |
368 | } |
369 | ||
36af4a4e JJ |
370 | if (! link_info.shared || link_info.pie) |
371 | link_info.executable = TRUE; | |
372 | ||
252b5132 RH |
373 | /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
374 | don't see how else this can be handled, since in this case we | |
375 | must preserve all externally visible symbols. */ | |
1049f94e | 376 | if (link_info.relocatable && link_info.strip == strip_all) |
252b5132 RH |
377 | { |
378 | link_info.strip = strip_debugger; | |
f5fa8ca2 | 379 | if (link_info.discard == discard_sec_merge) |
252b5132 RH |
380 | link_info.discard = discard_all; |
381 | } | |
382 | ||
383 | /* This essentially adds another -L directory so this must be done after | |
384 | the -L's in argv have been processed. */ | |
385 | set_scripts_dir (); | |
386 | ||
b9a8de1e NC |
387 | /* If we have not already opened and parsed a linker script |
388 | read the emulation's appropriate default script. */ | |
b90e1c6f | 389 | if (saved_script_handle == NULL) |
252b5132 | 390 | { |
252b5132 | 391 | int isfile; |
b7a26f91 | 392 | char *s = ldemul_get_script (&isfile); |
252b5132 RH |
393 | |
394 | if (isfile) | |
395 | ldfile_open_command_file (s); | |
396 | else | |
b7a26f91 | 397 | { |
252b5132 RH |
398 | lex_string = s; |
399 | lex_redirect (s); | |
400 | } | |
401 | parser_input = input_script; | |
402 | yyparse (); | |
403 | lex_string = NULL; | |
404 | } | |
405 | ||
b9a8de1e NC |
406 | if (trace_file_tries) |
407 | { | |
9cb61eab AM |
408 | if (saved_script_handle) |
409 | info_msg (_("using external linker script:")); | |
410 | else | |
411 | info_msg (_("using internal linker script:")); | |
412 | info_msg ("\n==================================================\n"); | |
b9a8de1e NC |
413 | |
414 | if (saved_script_handle) | |
415 | { | |
74699268 | 416 | static const int ld_bufsz = 8193; |
b9a8de1e | 417 | size_t n; |
74699268 | 418 | char *buf = xmalloc (ld_bufsz); |
b9a8de1e NC |
419 | |
420 | rewind (saved_script_handle); | |
74699268 | 421 | while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
b9a8de1e | 422 | { |
b7a26f91 | 423 | buf[n] = 0; |
b9a8de1e NC |
424 | info_msg (buf); |
425 | } | |
426 | rewind (saved_script_handle); | |
427 | free (buf); | |
428 | } | |
429 | else | |
430 | { | |
431 | int isfile; | |
432 | ||
b7a26f91 | 433 | info_msg (ldemul_get_script (&isfile)); |
b9a8de1e | 434 | } |
b7a26f91 | 435 | |
b9a8de1e NC |
436 | info_msg ("\n==================================================\n"); |
437 | } | |
438 | ||
252b5132 RH |
439 | lang_final (); |
440 | ||
b34976b6 | 441 | if (!lang_has_input_file) |
252b5132 RH |
442 | { |
443 | if (version_printed) | |
444 | xexit (0); | |
445 | einfo (_("%P%F: no input files\n")); | |
446 | } | |
447 | ||
448 | if (trace_files) | |
0125cdf2 | 449 | info_msg (_("%P: mode %s\n"), emulation); |
252b5132 RH |
450 | |
451 | ldemul_after_parse (); | |
452 | ||
252b5132 RH |
453 | if (config.map_filename) |
454 | { | |
455 | if (strcmp (config.map_filename, "-") == 0) | |
456 | { | |
457 | config.map_file = stdout; | |
458 | } | |
459 | else | |
460 | { | |
461 | config.map_file = fopen (config.map_filename, FOPEN_WT); | |
462 | if (config.map_file == (FILE *) NULL) | |
463 | { | |
464 | bfd_set_error (bfd_error_system_call); | |
465 | einfo (_("%P%F: cannot open map file %s: %E\n"), | |
466 | config.map_filename); | |
467 | } | |
468 | } | |
469 | } | |
470 | ||
252b5132 RH |
471 | lang_process (); |
472 | ||
473 | /* Print error messages for any missing symbols, for any warning | |
6d5e62f8 | 474 | symbols, and possibly multiple definitions. */ |
1049f94e | 475 | if (link_info.relocatable) |
252b5132 RH |
476 | output_bfd->flags &= ~EXEC_P; |
477 | else | |
478 | output_bfd->flags |= EXEC_P; | |
479 | ||
480 | ldwrite (); | |
481 | ||
482 | if (config.map_file != NULL) | |
483 | lang_map (); | |
484 | if (command_line.cref) | |
485 | output_cref (config.map_file != NULL ? config.map_file : stdout); | |
486 | if (nocrossref_list != NULL) | |
487 | check_nocrossrefs (); | |
488 | ||
750877ba L |
489 | lang_finish (); |
490 | ||
1049f94e | 491 | /* Even if we're producing relocatable output, some non-fatal errors should |
252b5132 | 492 | be reported in the exit status. (What non-fatal errors, if any, do we |
1049f94e | 493 | want to ignore for relocatable output?) */ |
b34976b6 | 494 | if (!config.make_executable && !force_make_executable) |
252b5132 | 495 | { |
b34976b6 | 496 | if (trace_files) |
0125cdf2 NC |
497 | einfo (_("%P: link errors found, deleting executable `%s'\n"), |
498 | output_filename); | |
252b5132 RH |
499 | |
500 | /* The file will be removed by remove_output. */ | |
252b5132 RH |
501 | xexit (1); |
502 | } | |
503 | else | |
504 | { | |
505 | if (! bfd_close (output_bfd)) | |
506 | einfo (_("%F%B: final close failed: %E\n"), output_bfd); | |
507 | ||
508 | /* If the --force-exe-suffix is enabled, and we're making an | |
6d5e62f8 KH |
509 | executable file and it doesn't end in .exe, copy it to one |
510 | which does. */ | |
1049f94e | 511 | if (! link_info.relocatable && command_line.force_exe_suffix) |
252b5132 RH |
512 | { |
513 | int len = strlen (output_filename); | |
0125cdf2 | 514 | |
6d5e62f8 | 515 | if (len < 4 |
252b5132 RH |
516 | || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
517 | && strcasecmp (output_filename + len - 4, ".dll") != 0)) | |
518 | { | |
519 | FILE *src; | |
520 | FILE *dst; | |
521 | const int bsize = 4096; | |
522 | char *buf = xmalloc (bsize); | |
523 | int l; | |
524 | char *dst_name = xmalloc (len + 5); | |
0125cdf2 | 525 | |
252b5132 RH |
526 | strcpy (dst_name, output_filename); |
527 | strcat (dst_name, ".exe"); | |
528 | src = fopen (output_filename, FOPEN_RB); | |
529 | dst = fopen (dst_name, FOPEN_WB); | |
530 | ||
531 | if (!src) | |
1579bae1 AM |
532 | einfo (_("%X%P: unable to open for source of copy `%s'\n"), |
533 | output_filename); | |
252b5132 | 534 | if (!dst) |
1579bae1 AM |
535 | einfo (_("%X%P: unable to open for destination of copy `%s'\n"), |
536 | dst_name); | |
252b5132 RH |
537 | while ((l = fread (buf, 1, bsize, src)) > 0) |
538 | { | |
539 | int done = fwrite (buf, 1, l, dst); | |
0125cdf2 | 540 | |
252b5132 | 541 | if (done != l) |
0125cdf2 | 542 | einfo (_("%P: Error writing file `%s'\n"), dst_name); |
252b5132 | 543 | } |
0125cdf2 | 544 | |
252b5132 RH |
545 | fclose (src); |
546 | if (fclose (dst) == EOF) | |
0125cdf2 | 547 | einfo (_("%P: Error closing file `%s'\n"), dst_name); |
252b5132 RH |
548 | free (dst_name); |
549 | free (buf); | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
554 | END_PROGRESS (program_name); | |
555 | ||
556 | if (config.stats) | |
557 | { | |
558 | #ifdef HAVE_SBRK | |
1579bae1 | 559 | char *lim = sbrk (0); |
252b5132 RH |
560 | #endif |
561 | long run_time = get_run_time () - start_time; | |
562 | ||
563 | fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), | |
564 | program_name, run_time / 1000000, run_time % 1000000); | |
565 | #ifdef HAVE_SBRK | |
566 | fprintf (stderr, _("%s: data size %ld\n"), program_name, | |
567 | (long) (lim - (char *) &environ)); | |
568 | #endif | |
569 | } | |
570 | ||
571 | /* Prevent remove_output from doing anything, after a successful link. */ | |
572 | output_filename = NULL; | |
573 | ||
574 | xexit (0); | |
575 | return 0; | |
576 | } | |
577 | ||
e2243057 RS |
578 | /* If the configured sysroot is relocatable, try relocating it based on |
579 | default prefix FROM. Return the relocated directory if it exists, | |
580 | otherwise return null. */ | |
581 | ||
582 | static char * | |
583 | get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) | |
584 | { | |
585 | #ifdef TARGET_SYSTEM_ROOT_RELOCATABLE | |
586 | char *path; | |
587 | struct stat s; | |
588 | ||
589 | path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); | |
590 | if (path) | |
591 | { | |
592 | if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) | |
593 | return path; | |
594 | free (path); | |
595 | } | |
596 | #endif | |
597 | return 0; | |
598 | } | |
599 | ||
600 | /* Return the sysroot directory. Return "" if no sysroot is being used. */ | |
601 | ||
602 | static const char * | |
603 | get_sysroot (int argc, char **argv) | |
604 | { | |
605 | int i; | |
606 | const char *path; | |
607 | ||
608 | for (i = 1; i < argc; i++) | |
609 | if (strncmp (argv[i], "--sysroot=", strlen ("--sysroot=")) == 0) | |
610 | return argv[i] + strlen ("--sysroot="); | |
611 | ||
612 | path = get_relative_sysroot (BINDIR); | |
613 | if (path) | |
614 | return path; | |
615 | ||
616 | path = get_relative_sysroot (TOOLBINDIR); | |
617 | if (path) | |
618 | return path; | |
619 | ||
620 | return TARGET_SYSTEM_ROOT; | |
621 | } | |
622 | ||
252b5132 RH |
623 | /* We need to find any explicitly given emulation in order to initialize the |
624 | state that's needed by the lex&yacc argument parser (parse_args). */ | |
625 | ||
626 | static char * | |
1579bae1 | 627 | get_emulation (int argc, char **argv) |
252b5132 RH |
628 | { |
629 | char *emulation; | |
630 | int i; | |
631 | ||
632 | emulation = getenv (EMULATION_ENVIRON); | |
633 | if (emulation == NULL) | |
634 | emulation = DEFAULT_EMULATION; | |
635 | ||
636 | for (i = 1; i < argc; i++) | |
637 | { | |
638 | if (!strncmp (argv[i], "-m", 2)) | |
639 | { | |
640 | if (argv[i][2] == '\0') | |
641 | { | |
642 | /* -m EMUL */ | |
643 | if (i < argc - 1) | |
644 | { | |
645 | emulation = argv[i + 1]; | |
646 | i++; | |
647 | } | |
648 | else | |
0125cdf2 | 649 | einfo (_("%P%F: missing argument to -m\n")); |
252b5132 RH |
650 | } |
651 | else if (strcmp (argv[i], "-mips1") == 0 | |
652 | || strcmp (argv[i], "-mips2") == 0 | |
653 | || strcmp (argv[i], "-mips3") == 0 | |
d1cf510e | 654 | || strcmp (argv[i], "-mips4") == 0 |
6f33421c CD |
655 | || strcmp (argv[i], "-mips5") == 0 |
656 | || strcmp (argv[i], "-mips32") == 0 | |
657 | || strcmp (argv[i], "-mips32r2") == 0 | |
5f74bc13 CD |
658 | || strcmp (argv[i], "-mips64") == 0 |
659 | || strcmp (argv[i], "-mips64r2") == 0) | |
252b5132 | 660 | { |
31d677f9 | 661 | /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
252b5132 RH |
662 | passed to the linker by some MIPS compilers. They |
663 | generally tell the linker to use a slightly different | |
664 | library path. Perhaps someday these should be | |
665 | implemented as emulations; until then, we just ignore | |
666 | the arguments and hope that nobody ever creates | |
667 | emulations named ips1, ips2 or ips3. */ | |
668 | } | |
669 | else if (strcmp (argv[i], "-m486") == 0) | |
670 | { | |
671 | /* FIXME: The argument -m486 is passed to the linker on | |
672 | some Linux systems. Hope that nobody creates an | |
673 | emulation named 486. */ | |
674 | } | |
675 | else | |
676 | { | |
677 | /* -mEMUL */ | |
678 | emulation = &argv[i][2]; | |
679 | } | |
680 | } | |
681 | } | |
682 | ||
683 | return emulation; | |
684 | } | |
685 | ||
686 | /* If directory DIR contains an "ldscripts" subdirectory, | |
b34976b6 AM |
687 | add DIR to the library search path and return TRUE, |
688 | else return FALSE. */ | |
252b5132 | 689 | |
b34976b6 | 690 | static bfd_boolean |
1579bae1 | 691 | check_for_scripts_dir (char *dir) |
252b5132 RH |
692 | { |
693 | size_t dirlen; | |
694 | char *buf; | |
695 | struct stat s; | |
b34976b6 | 696 | bfd_boolean res; |
252b5132 RH |
697 | |
698 | dirlen = strlen (dir); | |
699 | /* sizeof counts the terminating NUL. */ | |
1579bae1 | 700 | buf = xmalloc (dirlen + sizeof ("/ldscripts")); |
252b5132 RH |
701 | sprintf (buf, "%s/ldscripts", dir); |
702 | ||
703 | res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); | |
704 | free (buf); | |
705 | if (res) | |
b34976b6 | 706 | ldfile_add_library_path (dir, FALSE); |
252b5132 RH |
707 | return res; |
708 | } | |
709 | ||
710 | /* Set the default directory for finding script files. | |
711 | Libraries will be searched for here too, but that's ok. | |
712 | We look for the "ldscripts" directory in: | |
713 | ||
cdc0d45e DJ |
714 | SCRIPTDIR (passed from Makefile) |
715 | (adjusted according to the current location of the binary) | |
252b5132 RH |
716 | SCRIPTDIR (passed from Makefile) |
717 | the dir where this program is (for using it from the build tree) | |
cdc0d45e | 718 | the dir where this program is/../lib |
0125cdf2 | 719 | (for installing the tool suite elsewhere). */ |
252b5132 RH |
720 | |
721 | static void | |
1579bae1 | 722 | set_scripts_dir (void) |
252b5132 RH |
723 | { |
724 | char *end, *dir; | |
725 | size_t dirlen; | |
5ed6aba4 | 726 | bfd_boolean found; |
252b5132 | 727 | |
cdc0d45e | 728 | dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR); |
cdc0d45e | 729 | if (dir) |
5ed6aba4 NC |
730 | { |
731 | found = check_for_scripts_dir (dir); | |
732 | free (dir); | |
733 | if (found) | |
734 | return; | |
735 | } | |
cdc0d45e | 736 | |
4ca1b790 | 737 | dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR); |
4ca1b790 | 738 | if (dir) |
5ed6aba4 NC |
739 | { |
740 | found = check_for_scripts_dir (dir); | |
741 | free (dir); | |
742 | if (found) | |
743 | return; | |
744 | } | |
4ca1b790 | 745 | |
252b5132 | 746 | if (check_for_scripts_dir (SCRIPTDIR)) |
6d5e62f8 KH |
747 | /* We've been installed normally. */ |
748 | return; | |
252b5132 RH |
749 | |
750 | /* Look for "ldscripts" in the dir where our binary is. */ | |
751 | end = strrchr (program_name, '/'); | |
5af11cab AM |
752 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
753 | { | |
754 | /* We could have \foo\bar, or /foo\bar. */ | |
755 | char *bslash = strrchr (program_name, '\\'); | |
0125cdf2 | 756 | |
2ab47eed | 757 | if (end == NULL || (bslash != NULL && bslash > end)) |
5af11cab AM |
758 | end = bslash; |
759 | } | |
760 | #endif | |
252b5132 RH |
761 | |
762 | if (end == NULL) | |
0125cdf2 NC |
763 | /* Don't look for ldscripts in the current directory. There is |
764 | too much potential for confusion. */ | |
765 | return; | |
252b5132 RH |
766 | |
767 | dirlen = end - program_name; | |
768 | /* Make a copy of program_name in dir. | |
769 | Leave room for later "/../lib". */ | |
1579bae1 | 770 | dir = xmalloc (dirlen + 8); |
252b5132 RH |
771 | strncpy (dir, program_name, dirlen); |
772 | dir[dirlen] = '\0'; | |
773 | ||
774 | if (check_for_scripts_dir (dir)) | |
5ed6aba4 NC |
775 | { |
776 | free (dir); | |
777 | return; | |
778 | } | |
252b5132 RH |
779 | |
780 | /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ | |
781 | strcpy (dir + dirlen, "/../lib"); | |
5ed6aba4 | 782 | check_for_scripts_dir (dir); |
6d5e62f8 | 783 | free (dir); |
252b5132 RH |
784 | } |
785 | ||
786 | void | |
1579bae1 | 787 | add_ysym (const char *name) |
252b5132 | 788 | { |
1579bae1 | 789 | if (link_info.notice_hash == NULL) |
252b5132 | 790 | { |
1579bae1 | 791 | link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
792 | if (!bfd_hash_table_init_n (link_info.notice_hash, |
793 | bfd_hash_newfunc, | |
794 | sizeof (struct bfd_hash_entry), | |
795 | 61)) | |
252b5132 | 796 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
6d5e62f8 | 797 | } |
252b5132 | 798 | |
1579bae1 | 799 | if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
800 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
801 | } | |
802 | ||
803 | /* Record a symbol to be wrapped, from the --wrap option. */ | |
804 | ||
805 | void | |
1579bae1 | 806 | add_wrap (const char *name) |
252b5132 RH |
807 | { |
808 | if (link_info.wrap_hash == NULL) | |
809 | { | |
1579bae1 | 810 | link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
811 | if (!bfd_hash_table_init_n (link_info.wrap_hash, |
812 | bfd_hash_newfunc, | |
813 | sizeof (struct bfd_hash_entry), | |
814 | 61)) | |
252b5132 RH |
815 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
816 | } | |
0125cdf2 | 817 | |
b34976b6 | 818 | if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
819 | einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
820 | } | |
821 | ||
822 | /* Handle the -retain-symbols-file option. */ | |
823 | ||
824 | void | |
1579bae1 | 825 | add_keepsyms_file (const char *filename) |
252b5132 RH |
826 | { |
827 | FILE *file; | |
828 | char *buf; | |
829 | size_t bufsize; | |
830 | int c; | |
831 | ||
832 | if (link_info.strip == strip_some) | |
833 | einfo (_("%X%P: error: duplicate retain-symbols-file\n")); | |
834 | ||
835 | file = fopen (filename, "r"); | |
1579bae1 | 836 | if (file == NULL) |
252b5132 RH |
837 | { |
838 | bfd_set_error (bfd_error_system_call); | |
839 | einfo ("%X%P: %s: %E\n", filename); | |
840 | return; | |
841 | } | |
842 | ||
1579bae1 | 843 | link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
844 | if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, |
845 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
846 | einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
847 | ||
848 | bufsize = 100; | |
1579bae1 | 849 | buf = xmalloc (bufsize); |
252b5132 RH |
850 | |
851 | c = getc (file); | |
852 | while (c != EOF) | |
853 | { | |
3882b010 | 854 | while (ISSPACE (c)) |
252b5132 RH |
855 | c = getc (file); |
856 | ||
857 | if (c != EOF) | |
858 | { | |
859 | size_t len = 0; | |
860 | ||
3882b010 | 861 | while (! ISSPACE (c) && c != EOF) |
252b5132 RH |
862 | { |
863 | buf[len] = c; | |
864 | ++len; | |
865 | if (len >= bufsize) | |
866 | { | |
867 | bufsize *= 2; | |
868 | buf = xrealloc (buf, bufsize); | |
869 | } | |
870 | c = getc (file); | |
871 | } | |
872 | ||
873 | buf[len] = '\0'; | |
874 | ||
1579bae1 | 875 | if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) |
252b5132 RH |
876 | einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
877 | } | |
878 | } | |
879 | ||
880 | if (link_info.strip != strip_none) | |
881 | einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); | |
882 | ||
5ed6aba4 | 883 | free (buf); |
252b5132 RH |
884 | link_info.strip = strip_some; |
885 | } | |
886 | \f | |
887 | /* Callbacks from the BFD linker routines. */ | |
888 | ||
889 | /* This is called when BFD has decided to include an archive member in | |
890 | a link. */ | |
891 | ||
b34976b6 | 892 | static bfd_boolean |
e1fffbe6 | 893 | add_archive_element (struct bfd_link_info *info, |
1579bae1 AM |
894 | bfd *abfd, |
895 | const char *name) | |
252b5132 RH |
896 | { |
897 | lang_input_statement_type *input; | |
898 | ||
1579bae1 | 899 | input = xmalloc (sizeof (lang_input_statement_type)); |
252b5132 RH |
900 | input->filename = abfd->filename; |
901 | input->local_sym_name = abfd->filename; | |
902 | input->the_bfd = abfd; | |
903 | input->asymbols = NULL; | |
904 | input->next = NULL; | |
b34976b6 AM |
905 | input->just_syms_flag = FALSE; |
906 | input->loaded = FALSE; | |
907 | input->search_dirs_flag = FALSE; | |
252b5132 RH |
908 | |
909 | /* FIXME: The following fields are not set: header.next, | |
910 | header.type, closed, passive_position, symbol_count, | |
911 | next_real_file, is_archive, target, real. This bit of code is | |
912 | from the old decode_library_subfile function. I don't know | |
913 | whether any of those fields matters. */ | |
914 | ||
915 | ldlang_add_file (input); | |
916 | ||
1579bae1 | 917 | if (config.map_file != NULL) |
252b5132 | 918 | { |
b34976b6 | 919 | static bfd_boolean header_printed; |
252b5132 RH |
920 | struct bfd_link_hash_entry *h; |
921 | bfd *from; | |
922 | int len; | |
923 | ||
e1fffbe6 | 924 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); |
252b5132 RH |
925 | |
926 | if (h == NULL) | |
927 | from = NULL; | |
928 | else | |
929 | { | |
930 | switch (h->type) | |
931 | { | |
932 | default: | |
933 | from = NULL; | |
934 | break; | |
935 | ||
936 | case bfd_link_hash_defined: | |
937 | case bfd_link_hash_defweak: | |
938 | from = h->u.def.section->owner; | |
939 | break; | |
940 | ||
941 | case bfd_link_hash_undefined: | |
942 | case bfd_link_hash_undefweak: | |
943 | from = h->u.undef.abfd; | |
944 | break; | |
945 | ||
946 | case bfd_link_hash_common: | |
947 | from = h->u.c.p->section->owner; | |
948 | break; | |
949 | } | |
950 | } | |
951 | ||
952 | if (! header_printed) | |
953 | { | |
954 | char buf[100]; | |
955 | ||
e3c8793a | 956 | sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
252b5132 | 957 | minfo ("%s", buf); |
b34976b6 | 958 | header_printed = TRUE; |
252b5132 RH |
959 | } |
960 | ||
961 | if (bfd_my_archive (abfd) == NULL) | |
962 | { | |
963 | minfo ("%s", bfd_get_filename (abfd)); | |
964 | len = strlen (bfd_get_filename (abfd)); | |
965 | } | |
966 | else | |
967 | { | |
968 | minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), | |
969 | bfd_get_filename (abfd)); | |
970 | len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) | |
971 | + strlen (bfd_get_filename (abfd)) | |
972 | + 2); | |
973 | } | |
974 | ||
975 | if (len >= 29) | |
976 | { | |
977 | print_nl (); | |
978 | len = 0; | |
979 | } | |
980 | while (len < 30) | |
981 | { | |
982 | print_space (); | |
983 | ++len; | |
984 | } | |
985 | ||
986 | if (from != NULL) | |
987 | minfo ("%B ", from); | |
988 | if (h != NULL) | |
989 | minfo ("(%T)\n", h->root.string); | |
990 | else | |
991 | minfo ("(%s)\n", name); | |
992 | } | |
993 | ||
994 | if (trace_files || trace_file_tries) | |
995 | info_msg ("%I\n", input); | |
996 | ||
b34976b6 | 997 | return TRUE; |
252b5132 RH |
998 | } |
999 | ||
1000 | /* This is called when BFD has discovered a symbol which is defined | |
1001 | multiple times. */ | |
1002 | ||
b34976b6 | 1003 | static bfd_boolean |
1579bae1 AM |
1004 | multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1005 | const char *name, | |
1006 | bfd *obfd, | |
1007 | asection *osec, | |
1008 | bfd_vma oval, | |
1009 | bfd *nbfd, | |
1010 | asection *nsec, | |
1011 | bfd_vma nval) | |
252b5132 RH |
1012 | { |
1013 | /* If either section has the output_section field set to | |
1014 | bfd_abs_section_ptr, it means that the section is being | |
1015 | discarded, and this is not really a multiple definition at all. | |
1016 | FIXME: It would be cleaner to somehow ignore symbols defined in | |
1017 | sections which are being discarded. */ | |
1018 | if ((osec->output_section != NULL | |
1019 | && ! bfd_is_abs_section (osec) | |
1020 | && bfd_is_abs_section (osec->output_section)) | |
1021 | || (nsec->output_section != NULL | |
1022 | && ! bfd_is_abs_section (nsec) | |
1023 | && bfd_is_abs_section (nsec->output_section))) | |
b34976b6 | 1024 | return TRUE; |
252b5132 RH |
1025 | |
1026 | einfo (_("%X%C: multiple definition of `%T'\n"), | |
1027 | nbfd, nsec, nval, name); | |
1579bae1 | 1028 | if (obfd != NULL) |
252b5132 | 1029 | einfo (_("%D: first defined here\n"), obfd, osec, oval); |
9b14b192 NC |
1030 | |
1031 | if (command_line.relax) | |
1032 | { | |
1033 | einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); | |
1034 | command_line.relax = 0; | |
1035 | } | |
6d5e62f8 | 1036 | |
b34976b6 | 1037 | return TRUE; |
252b5132 RH |
1038 | } |
1039 | ||
1040 | /* This is called when there is a definition of a common symbol, or | |
1041 | when a common symbol is found for a symbol that is already defined, | |
1042 | or when two common symbols are found. We only do something if | |
1043 | -warn-common was used. */ | |
1044 | ||
b34976b6 | 1045 | static bfd_boolean |
1579bae1 AM |
1046 | multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1047 | const char *name, | |
1048 | bfd *obfd, | |
1049 | enum bfd_link_hash_type otype, | |
1050 | bfd_vma osize, | |
1051 | bfd *nbfd, | |
1052 | enum bfd_link_hash_type ntype, | |
1053 | bfd_vma nsize) | |
252b5132 RH |
1054 | { |
1055 | if (! config.warn_common) | |
b34976b6 | 1056 | return TRUE; |
252b5132 RH |
1057 | |
1058 | if (ntype == bfd_link_hash_defined | |
1059 | || ntype == bfd_link_hash_defweak | |
1060 | || ntype == bfd_link_hash_indirect) | |
1061 | { | |
1062 | ASSERT (otype == bfd_link_hash_common); | |
1063 | einfo (_("%B: warning: definition of `%T' overriding common\n"), | |
1064 | nbfd, name); | |
1065 | if (obfd != NULL) | |
1066 | einfo (_("%B: warning: common is here\n"), obfd); | |
1067 | } | |
1068 | else if (otype == bfd_link_hash_defined | |
1069 | || otype == bfd_link_hash_defweak | |
1070 | || otype == bfd_link_hash_indirect) | |
1071 | { | |
1072 | ASSERT (ntype == bfd_link_hash_common); | |
1073 | einfo (_("%B: warning: common of `%T' overridden by definition\n"), | |
1074 | nbfd, name); | |
1075 | if (obfd != NULL) | |
1076 | einfo (_("%B: warning: defined here\n"), obfd); | |
1077 | } | |
1078 | else | |
1079 | { | |
1080 | ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); | |
1081 | if (osize > nsize) | |
1082 | { | |
1083 | einfo (_("%B: warning: common of `%T' overridden by larger common\n"), | |
1084 | nbfd, name); | |
1085 | if (obfd != NULL) | |
1086 | einfo (_("%B: warning: larger common is here\n"), obfd); | |
1087 | } | |
1088 | else if (nsize > osize) | |
1089 | { | |
1090 | einfo (_("%B: warning: common of `%T' overriding smaller common\n"), | |
1091 | nbfd, name); | |
1092 | if (obfd != NULL) | |
1093 | einfo (_("%B: warning: smaller common is here\n"), obfd); | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); | |
1098 | if (obfd != NULL) | |
1099 | einfo (_("%B: warning: previous common is here\n"), obfd); | |
1100 | } | |
1101 | } | |
1102 | ||
b34976b6 | 1103 | return TRUE; |
252b5132 RH |
1104 | } |
1105 | ||
1106 | /* This is called when BFD has discovered a set element. H is the | |
1107 | entry in the linker hash table for the set. SECTION and VALUE | |
1108 | represent a value which should be added to the set. */ | |
1109 | ||
b34976b6 | 1110 | static bfd_boolean |
1579bae1 AM |
1111 | add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1112 | struct bfd_link_hash_entry *h, | |
1113 | bfd_reloc_code_real_type reloc, | |
1114 | bfd *abfd, | |
1115 | asection *section, | |
1116 | bfd_vma value) | |
252b5132 RH |
1117 | { |
1118 | if (config.warn_constructors) | |
1119 | einfo (_("%P: warning: global constructor %s used\n"), | |
1120 | h->root.string); | |
1121 | ||
1122 | if (! config.build_constructors) | |
b34976b6 | 1123 | return TRUE; |
252b5132 | 1124 | |
1579bae1 | 1125 | ldctor_add_set_entry (h, reloc, NULL, section, value); |
252b5132 RH |
1126 | |
1127 | if (h->type == bfd_link_hash_new) | |
1128 | { | |
1129 | h->type = bfd_link_hash_undefined; | |
1130 | h->u.undef.abfd = abfd; | |
1131 | /* We don't call bfd_link_add_undef to add this to the list of | |
1132 | undefined symbols because we are going to define it | |
1133 | ourselves. */ | |
1134 | } | |
1135 | ||
b34976b6 | 1136 | return TRUE; |
252b5132 RH |
1137 | } |
1138 | ||
1139 | /* This is called when BFD has discovered a constructor. This is only | |
1140 | called for some object file formats--those which do not handle | |
1141 | constructors in some more clever fashion. This is similar to | |
1142 | adding an element to a set, but less general. */ | |
1143 | ||
b34976b6 | 1144 | static bfd_boolean |
1579bae1 AM |
1145 | constructor_callback (struct bfd_link_info *info, |
1146 | bfd_boolean constructor, | |
1147 | const char *name, | |
1148 | bfd *abfd, | |
1149 | asection *section, | |
1150 | bfd_vma value) | |
252b5132 RH |
1151 | { |
1152 | char *s; | |
1153 | struct bfd_link_hash_entry *h; | |
1154 | char set_name[1 + sizeof "__CTOR_LIST__"]; | |
1155 | ||
1156 | if (config.warn_constructors) | |
1157 | einfo (_("%P: warning: global constructor %s used\n"), name); | |
1158 | ||
1159 | if (! config.build_constructors) | |
b34976b6 | 1160 | return TRUE; |
252b5132 RH |
1161 | |
1162 | /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a | |
1163 | useful error message. */ | |
1164 | if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL | |
e1fffbe6 | 1165 | && (info->relocatable |
252b5132 RH |
1166 | || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
1167 | einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); | |
1168 | ||
1169 | s = set_name; | |
1170 | if (bfd_get_symbol_leading_char (abfd) != '\0') | |
1171 | *s++ = bfd_get_symbol_leading_char (abfd); | |
1172 | if (constructor) | |
1173 | strcpy (s, "__CTOR_LIST__"); | |
1174 | else | |
1175 | strcpy (s, "__DTOR_LIST__"); | |
1176 | ||
b34976b6 | 1177 | h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); |
252b5132 RH |
1178 | if (h == (struct bfd_link_hash_entry *) NULL) |
1179 | einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); | |
1180 | if (h->type == bfd_link_hash_new) | |
1181 | { | |
1182 | h->type = bfd_link_hash_undefined; | |
1183 | h->u.undef.abfd = abfd; | |
1184 | /* We don't call bfd_link_add_undef to add this to the list of | |
1185 | undefined symbols because we are going to define it | |
1186 | ourselves. */ | |
1187 | } | |
1188 | ||
1189 | ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); | |
b34976b6 | 1190 | return TRUE; |
252b5132 RH |
1191 | } |
1192 | ||
1193 | /* A structure used by warning_callback to pass information through | |
1194 | bfd_map_over_sections. */ | |
1195 | ||
0125cdf2 NC |
1196 | struct warning_callback_info |
1197 | { | |
b34976b6 | 1198 | bfd_boolean found; |
252b5132 RH |
1199 | const char *warning; |
1200 | const char *symbol; | |
1201 | asymbol **asymbols; | |
1202 | }; | |
1203 | ||
1204 | /* This is called when there is a reference to a warning symbol. */ | |
1205 | ||
b34976b6 | 1206 | static bfd_boolean |
1579bae1 AM |
1207 | warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1208 | const char *warning, | |
1209 | const char *symbol, | |
1210 | bfd *abfd, | |
1211 | asection *section, | |
1212 | bfd_vma address) | |
252b5132 RH |
1213 | { |
1214 | /* This is a hack to support warn_multiple_gp. FIXME: This should | |
1215 | have a cleaner interface, but what? */ | |
1216 | if (! config.warn_multiple_gp | |
1217 | && strcmp (warning, "using multiple gp values") == 0) | |
b34976b6 | 1218 | return TRUE; |
252b5132 RH |
1219 | |
1220 | if (section != NULL) | |
300475fe | 1221 | einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); |
252b5132 | 1222 | else if (abfd == NULL) |
300475fe | 1223 | einfo ("%P: %s%s\n", _("warning: "), warning); |
252b5132 | 1224 | else if (symbol == NULL) |
300475fe | 1225 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1226 | else |
1227 | { | |
1228 | lang_input_statement_type *entry; | |
1229 | asymbol **asymbols; | |
1230 | struct warning_callback_info info; | |
1231 | ||
1232 | /* Look through the relocs to see if we can find a plausible | |
1233 | address. */ | |
252b5132 RH |
1234 | entry = (lang_input_statement_type *) abfd->usrdata; |
1235 | if (entry != NULL && entry->asymbols != NULL) | |
1236 | asymbols = entry->asymbols; | |
1237 | else | |
1238 | { | |
1239 | long symsize; | |
1240 | long symbol_count; | |
1241 | ||
1242 | symsize = bfd_get_symtab_upper_bound (abfd); | |
1243 | if (symsize < 0) | |
1244 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1579bae1 | 1245 | asymbols = xmalloc (symsize); |
252b5132 RH |
1246 | symbol_count = bfd_canonicalize_symtab (abfd, asymbols); |
1247 | if (symbol_count < 0) | |
1248 | einfo (_("%B%F: could not read symbols: %E\n"), abfd); | |
1249 | if (entry != NULL) | |
1250 | { | |
1251 | entry->asymbols = asymbols; | |
1252 | entry->symbol_count = symbol_count; | |
1253 | } | |
1254 | } | |
1255 | ||
b34976b6 | 1256 | info.found = FALSE; |
252b5132 RH |
1257 | info.warning = warning; |
1258 | info.symbol = symbol; | |
1259 | info.asymbols = asymbols; | |
1579bae1 | 1260 | bfd_map_over_sections (abfd, warning_find_reloc, &info); |
252b5132 RH |
1261 | |
1262 | if (! info.found) | |
300475fe | 1263 | einfo ("%B: %s%s\n", abfd, _("warning: "), warning); |
252b5132 RH |
1264 | |
1265 | if (entry == NULL) | |
1266 | free (asymbols); | |
1267 | } | |
1268 | ||
b34976b6 | 1269 | return TRUE; |
252b5132 RH |
1270 | } |
1271 | ||
1272 | /* This is called by warning_callback for each section. It checks the | |
1273 | relocs of the section to see if it can find a reference to the | |
1274 | symbol which triggered the warning. If it can, it uses the reloc | |
1275 | to give an error message with a file and line number. */ | |
1276 | ||
1277 | static void | |
1579bae1 | 1278 | warning_find_reloc (bfd *abfd, asection *sec, void *iarg) |
252b5132 | 1279 | { |
1579bae1 | 1280 | struct warning_callback_info *info = iarg; |
252b5132 RH |
1281 | long relsize; |
1282 | arelent **relpp; | |
1283 | long relcount; | |
1284 | arelent **p, **pend; | |
1285 | ||
1286 | if (info->found) | |
1287 | return; | |
1288 | ||
1289 | relsize = bfd_get_reloc_upper_bound (abfd, sec); | |
1290 | if (relsize < 0) | |
1291 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1292 | if (relsize == 0) | |
1293 | return; | |
1294 | ||
1579bae1 | 1295 | relpp = xmalloc (relsize); |
252b5132 RH |
1296 | relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
1297 | if (relcount < 0) | |
1298 | einfo (_("%B%F: could not read relocs: %E\n"), abfd); | |
1299 | ||
1300 | p = relpp; | |
1301 | pend = p + relcount; | |
1302 | for (; p < pend && *p != NULL; p++) | |
1303 | { | |
1304 | arelent *q = *p; | |
1305 | ||
1306 | if (q->sym_ptr_ptr != NULL | |
1307 | && *q->sym_ptr_ptr != NULL | |
1308 | && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) | |
1309 | { | |
1310 | /* We found a reloc for the symbol we are looking for. */ | |
300475fe HPN |
1311 | einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), |
1312 | info->warning); | |
b34976b6 | 1313 | info->found = TRUE; |
252b5132 RH |
1314 | break; |
1315 | } | |
1316 | } | |
1317 | ||
1318 | free (relpp); | |
1319 | } | |
1320 | ||
1321 | /* This is called when an undefined symbol is found. */ | |
1322 | ||
b34976b6 | 1323 | static bfd_boolean |
1579bae1 AM |
1324 | undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1325 | const char *name, | |
1326 | bfd *abfd, | |
1327 | asection *section, | |
1328 | bfd_vma address, | |
0b28295d | 1329 | bfd_boolean error) |
252b5132 RH |
1330 | { |
1331 | static char *error_name; | |
1332 | static unsigned int error_count; | |
1333 | ||
1334 | #define MAX_ERRORS_IN_A_ROW 5 | |
1335 | ||
1336 | if (config.warn_once) | |
1337 | { | |
1338 | static struct bfd_hash_table *hash; | |
1339 | ||
1340 | /* Only warn once about a particular undefined symbol. */ | |
252b5132 RH |
1341 | if (hash == NULL) |
1342 | { | |
1579bae1 | 1343 | hash = xmalloc (sizeof (struct bfd_hash_table)); |
66eb6687 AM |
1344 | if (!bfd_hash_table_init (hash, bfd_hash_newfunc, |
1345 | sizeof (struct bfd_hash_entry))) | |
252b5132 RH |
1346 | einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
1347 | } | |
1348 | ||
b34976b6 AM |
1349 | if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) |
1350 | return TRUE; | |
252b5132 | 1351 | |
b34976b6 | 1352 | if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) |
252b5132 RH |
1353 | einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
1354 | } | |
1355 | ||
1356 | /* We never print more than a reasonable number of errors in a row | |
1357 | for a single symbol. */ | |
1579bae1 | 1358 | if (error_name != NULL |
252b5132 RH |
1359 | && strcmp (name, error_name) == 0) |
1360 | ++error_count; | |
1361 | else | |
1362 | { | |
1363 | error_count = 0; | |
1579bae1 | 1364 | if (error_name != NULL) |
252b5132 | 1365 | free (error_name); |
d1b2b2dc | 1366 | error_name = xstrdup (name); |
252b5132 RH |
1367 | } |
1368 | ||
1369 | if (section != NULL) | |
1370 | { | |
1371 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1372 | { |
0b28295d ILT |
1373 | if (error) |
1374 | einfo (_("%X%C: undefined reference to `%T'\n"), | |
1375 | abfd, section, address, name); | |
1376 | else | |
1377 | einfo (_("%C: warning: undefined reference to `%T'\n"), | |
1378 | abfd, section, address, name); | |
b6f29aaa | 1379 | } |
252b5132 | 1380 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1381 | { |
1382 | if (error) | |
1383 | einfo (_("%X%D: more undefined references to `%T' follow\n"), | |
1384 | abfd, section, address, name); | |
1385 | else | |
1386 | einfo (_("%D: warning: more undefined references to `%T' follow\n"), | |
1387 | abfd, section, address, name); | |
1388 | } | |
1389 | else if (error) | |
1390 | einfo ("%X"); | |
252b5132 RH |
1391 | } |
1392 | else | |
1393 | { | |
1394 | if (error_count < MAX_ERRORS_IN_A_ROW) | |
b6f29aaa | 1395 | { |
0b28295d ILT |
1396 | if (error) |
1397 | einfo (_("%X%B: undefined reference to `%T'\n"), | |
1398 | abfd, name); | |
1399 | else | |
1400 | einfo (_("%B: warning: undefined reference to `%T'\n"), | |
1401 | abfd, name); | |
b6f29aaa | 1402 | } |
252b5132 | 1403 | else if (error_count == MAX_ERRORS_IN_A_ROW) |
0b28295d ILT |
1404 | { |
1405 | if (error) | |
1406 | einfo (_("%X%B: more undefined references to `%T' follow\n"), | |
1407 | abfd, name); | |
1408 | else | |
1409 | einfo (_("%B: warning: more undefined references to `%T' follow\n"), | |
1410 | abfd, name); | |
1411 | } | |
1412 | else if (error) | |
1413 | einfo ("%X"); | |
252b5132 RH |
1414 | } |
1415 | ||
b34976b6 | 1416 | return TRUE; |
252b5132 RH |
1417 | } |
1418 | ||
8aae64e6 AO |
1419 | /* Counter to limit the number of relocation overflow error messages |
1420 | to print. Errors are printed as it is decremented. When it's | |
1421 | called and the counter is zero, a final message is printed | |
1422 | indicating more relocations were omitted. When it gets to -1, no | |
1423 | such errors are printed. If it's initially set to a value less | |
1424 | than -1, all such errors will be printed (--verbose does this). */ | |
1425 | ||
1426 | int overflow_cutoff_limit = 10; | |
1427 | ||
252b5132 RH |
1428 | /* This is called when a reloc overflows. */ |
1429 | ||
b34976b6 | 1430 | static bfd_boolean |
1579bae1 | 1431 | reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
dfeffb9f | 1432 | struct bfd_link_hash_entry *entry, |
1579bae1 AM |
1433 | const char *name, |
1434 | const char *reloc_name, | |
1435 | bfd_vma addend, | |
1436 | bfd *abfd, | |
1437 | asection *section, | |
1438 | bfd_vma address) | |
252b5132 | 1439 | { |
8aae64e6 AO |
1440 | if (overflow_cutoff_limit == -1) |
1441 | return TRUE; | |
1442 | ||
e1fffbe6 | 1443 | einfo ("%X%C:", abfd, section, address); |
8aae64e6 AO |
1444 | |
1445 | if (overflow_cutoff_limit >= 0 | |
1446 | && overflow_cutoff_limit-- == 0) | |
1447 | { | |
1448 | einfo (_(" additional relocation overflows omitted from the output\n")); | |
1449 | return TRUE; | |
1450 | } | |
1451 | ||
dfeffb9f L |
1452 | if (entry) |
1453 | { | |
1454 | while (entry->type == bfd_link_hash_indirect | |
1455 | || entry->type == bfd_link_hash_warning) | |
1456 | entry = entry->u.i.link; | |
1457 | switch (entry->type) | |
1458 | { | |
1459 | case bfd_link_hash_undefined: | |
1460 | case bfd_link_hash_undefweak: | |
1461 | einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), | |
1462 | reloc_name, entry->root.string); | |
1463 | break; | |
1464 | case bfd_link_hash_defined: | |
1465 | case bfd_link_hash_defweak: | |
1466 | einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), | |
1467 | reloc_name, entry->root.string, | |
a6e1b90f L |
1468 | entry->u.def.section, |
1469 | entry->u.def.section == bfd_abs_section_ptr | |
1470 | ? output_bfd : entry->u.def.section->owner); | |
dfeffb9f L |
1471 | break; |
1472 | default: | |
1473 | abort (); | |
1474 | break; | |
1475 | } | |
1476 | } | |
1477 | else | |
1478 | einfo (_(" relocation truncated to fit: %s against `%T'"), | |
1479 | reloc_name, name); | |
252b5132 RH |
1480 | if (addend != 0) |
1481 | einfo ("+%v", addend); | |
1482 | einfo ("\n"); | |
b34976b6 | 1483 | return TRUE; |
252b5132 RH |
1484 | } |
1485 | ||
1486 | /* This is called when a dangerous relocation is made. */ | |
1487 | ||
b34976b6 | 1488 | static bfd_boolean |
1579bae1 AM |
1489 | reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1490 | const char *message, | |
1491 | bfd *abfd, | |
1492 | asection *section, | |
1493 | bfd_vma address) | |
252b5132 | 1494 | { |
e1fffbe6 AM |
1495 | einfo (_("%X%C: dangerous relocation: %s\n"), |
1496 | abfd, section, address, message); | |
b34976b6 | 1497 | return TRUE; |
252b5132 RH |
1498 | } |
1499 | ||
1500 | /* This is called when a reloc is being generated attached to a symbol | |
1501 | that is not being output. */ | |
1502 | ||
b34976b6 | 1503 | static bfd_boolean |
1579bae1 AM |
1504 | unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1505 | const char *name, | |
1506 | bfd *abfd, | |
1507 | asection *section, | |
1508 | bfd_vma address) | |
252b5132 | 1509 | { |
e1fffbe6 AM |
1510 | einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), |
1511 | abfd, section, address, name); | |
b34976b6 | 1512 | return TRUE; |
252b5132 RH |
1513 | } |
1514 | ||
1515 | /* This is called if link_info.notice_all is set, or when a symbol in | |
1516 | link_info.notice_hash is found. Symbols are put in notice_hash | |
1517 | using the -y option. */ | |
1518 | ||
b34976b6 | 1519 | static bfd_boolean |
1579bae1 AM |
1520 | notice (struct bfd_link_info *info, |
1521 | const char *name, | |
1522 | bfd *abfd, | |
1523 | asection *section, | |
1524 | bfd_vma value) | |
252b5132 | 1525 | { |
5061a885 AM |
1526 | if (name == NULL) |
1527 | { | |
1528 | if (command_line.cref || nocrossref_list != NULL) | |
1529 | return handle_asneeded_cref (abfd, value); | |
1530 | return TRUE; | |
1531 | } | |
1532 | ||
252b5132 RH |
1533 | if (! info->notice_all |
1534 | || (info->notice_hash != NULL | |
b34976b6 | 1535 | && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) |
252b5132 RH |
1536 | { |
1537 | if (bfd_is_und_section (section)) | |
1538 | einfo ("%B: reference to %s\n", abfd, name); | |
1539 | else | |
1540 | einfo ("%B: definition of %s\n", abfd, name); | |
1541 | } | |
1542 | ||
1543 | if (command_line.cref || nocrossref_list != NULL) | |
1544 | add_cref (name, abfd, section, value); | |
1545 | ||
b34976b6 | 1546 | return TRUE; |
252b5132 | 1547 | } |