1 /* Main program of GNU linker.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 Free Software Foundation, Inc.
5 Written by Steve Chamberlain steve@cygnus.com
7 This file is part of GLD, the Gnu Linker.
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)
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.
19 You should have received a copy of the GNU General Public License
20 along with GLD; see the file COPYING. If not, write to the Free
21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
27 #include "safe-ctype.h"
28 #include "libiberty.h"
31 #include "filenames.h"
45 /* Somewhere above, sys/stat.h got included . . . . */
46 #if !defined(S_ISDIR) && defined(S_IFDIR)
47 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
53 #ifdef NEED_DECLARATION_SBRK
58 int main PARAMS ((int, char **));
60 static char *get_emulation PARAMS ((int, char **));
61 static void set_scripts_dir PARAMS ((void));
66 const char *output_filename = "a.out";
68 /* Name this program was invoked by. */
71 /* The file that we're creating. */
74 /* Set by -G argument, for MIPS ECOFF target. */
75 int g_switch_value = 8;
77 /* Nonzero means print names of input files as processed. */
78 bfd_boolean trace_files;
80 /* Nonzero means same, but note open failures, too. */
81 bfd_boolean trace_file_tries;
83 /* Nonzero means version number was printed, so exit successfully
84 instead of complaining if no input files are given. */
85 bfd_boolean version_printed;
87 /* Nonzero means link in every member of an archive. */
88 bfd_boolean whole_archive;
90 /* TRUE if we should demangle symbol names. */
91 bfd_boolean demangling;
93 args_type command_line;
95 ld_config_type config;
97 static void remove_output PARAMS ((void));
98 static bfd_boolean check_for_scripts_dir PARAMS ((char *dir));
99 static bfd_boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *,
101 static bfd_boolean multiple_definition PARAMS ((struct bfd_link_info *,
103 bfd *, asection *, bfd_vma,
104 bfd *, asection *, bfd_vma));
105 static bfd_boolean multiple_common PARAMS ((struct bfd_link_info *,
107 enum bfd_link_hash_type, bfd_vma,
108 bfd *, enum bfd_link_hash_type,
110 static bfd_boolean add_to_set PARAMS ((struct bfd_link_info *,
111 struct bfd_link_hash_entry *,
112 bfd_reloc_code_real_type,
113 bfd *, asection *, bfd_vma));
114 static bfd_boolean constructor_callback PARAMS ((struct bfd_link_info *,
115 bfd_boolean constructor,
117 bfd *, asection *, bfd_vma));
118 static bfd_boolean warning_callback PARAMS ((struct bfd_link_info *,
119 const char *, const char *, bfd *,
120 asection *, bfd_vma));
121 static void warning_find_reloc PARAMS ((bfd *, asection *, PTR));
122 static bfd_boolean undefined_symbol PARAMS ((struct bfd_link_info *,
124 asection *, bfd_vma, bfd_boolean));
125 static bfd_boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *,
126 const char *, bfd_vma,
127 bfd *, asection *, bfd_vma));
128 static bfd_boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *,
129 bfd *, asection *, bfd_vma));
130 static bfd_boolean unattached_reloc PARAMS ((struct bfd_link_info *,
131 const char *, bfd *, asection *,
133 static bfd_boolean notice PARAMS ((struct bfd_link_info *, const char *,
134 bfd *, asection *, bfd_vma));
136 static struct bfd_link_callbacks link_callbacks = {
141 constructor_callback,
150 struct bfd_link_info link_info;
157 if (output_bfd && output_bfd->iostream)
158 fclose ((FILE *) (output_bfd->iostream));
159 if (delete_output_file_on_failure)
160 unlink (output_filename);
170 long start_time = get_run_time ();
172 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
173 setlocale (LC_MESSAGES, "");
175 #if defined (HAVE_SETLOCALE)
176 setlocale (LC_CTYPE, "");
178 bindtextdomain (PACKAGE, LOCALEDIR);
179 textdomain (PACKAGE);
181 program_name = argv[0];
182 xmalloc_set_program_name (program_name);
184 START_PROGRESS (program_name, 0);
188 bfd_set_error_program_name (program_name);
190 xatexit (remove_output);
192 /* Set the default BFD target based on the configured target. Doing
193 this permits the linker to be configured for a particular target,
194 and linked against a shared BFD library which was configured for
195 a different target. The macro TARGET is defined by Makefile. */
196 if (! bfd_set_default_target (TARGET))
198 einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET);
209 /* Initialize the data about options. */
210 trace_files = trace_file_tries = version_printed = FALSE;
211 whole_archive = FALSE;
212 config.build_constructors = TRUE;
213 config.dynamic_link = FALSE;
214 config.has_shared = FALSE;
215 config.split_by_reloc = (unsigned) -1;
216 config.split_by_file = (bfd_size_type) -1;
217 command_line.force_common_definition = FALSE;
218 command_line.inhibit_common_definition = FALSE;
219 command_line.interpreter = NULL;
220 command_line.rpath = NULL;
221 command_line.warn_mismatch = TRUE;
222 command_line.check_section_addresses = TRUE;
223 command_line.accept_unknown_input_arch = FALSE;
225 /* We initialize DEMANGLING based on the environment variable
226 COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
227 output of the linker, unless COLLECT_NO_DEMANGLE is set in the
228 environment. Acting the same way here lets us provide the same
229 interface by default. */
230 demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL;
232 link_info.relocateable = FALSE;
233 link_info.emitrelocations = FALSE;
234 link_info.task_link = FALSE;
235 link_info.shared = FALSE;
236 link_info.symbolic = FALSE;
237 link_info.export_dynamic = FALSE;
238 link_info.static_link = FALSE;
239 link_info.traditional_format = FALSE;
240 link_info.optimize = FALSE;
241 link_info.no_undefined = FALSE;
242 link_info.allow_shlib_undefined = FALSE;
243 link_info.allow_multiple_definition = FALSE;
244 link_info.allow_undefined_version = TRUE;
245 link_info.keep_memory = TRUE;
246 link_info.notice_all = FALSE;
247 link_info.nocopyreloc = FALSE;
248 link_info.new_dtags = FALSE;
249 link_info.combreloc = TRUE;
250 link_info.eh_frame_hdr = FALSE;
251 link_info.strip = strip_none;
252 link_info.discard = discard_sec_merge;
253 link_info.common_skip_ar_aymbols = bfd_link_common_skip_none;
254 link_info.callbacks = &link_callbacks;
255 link_info.hash = NULL;
256 link_info.keep_hash = NULL;
257 link_info.notice_hash = NULL;
258 link_info.wrap_hash = NULL;
259 link_info.input_bfds = NULL;
260 link_info.create_object_symbols_section = NULL;
261 link_info.gc_sym_list = NULL;
262 link_info.base_file = NULL;
263 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init
264 and _fini symbols. We are compatible. */
265 link_info.init_function = "_init";
266 link_info.fini_function = "_fini";
267 link_info.mpc860c0 = 0;
268 link_info.pei386_auto_import = -1;
269 link_info.pei386_runtime_pseudo_reloc = FALSE;
270 link_info.spare_dynamic_tags = 5;
271 link_info.flags = (bfd_vma) 0;
272 link_info.flags_1 = (bfd_vma) 0;
274 ldfile_add_arch ("");
276 config.make_executable = TRUE;
277 force_make_executable = FALSE;
278 config.magic_demand_paged = TRUE;
279 config.text_read_only = TRUE;
281 emulation = get_emulation (argc, argv);
282 ldemul_choose_mode (emulation);
283 default_target = ldemul_choose_target (argc, argv);
285 ldemul_before_parse ();
286 lang_has_input_file = FALSE;
287 parse_args (argc, argv);
289 ldemul_set_symbols ();
291 if (link_info.relocateable)
293 if (command_line.gc_sections)
294 einfo ("%P%F: --gc-sections and -r may not be used together\n");
295 if (link_info.mpc860c0)
296 einfo (_("%P%F: -r and --mpc860c0 may not be used together\n"));
297 else if (command_line.relax)
298 einfo (_("%P%F: --relax and -r may not be used together\n"));
299 if (link_info.shared)
300 einfo (_("%P%F: -r and -shared may not be used together\n"));
303 if (! link_info.shared)
305 if (command_line.filter_shlib)
306 einfo (_("%P%F: -F may not be used without -shared\n"));
307 if (command_line.auxiliary_filters)
308 einfo (_("%P%F: -f may not be used without -shared\n"));
311 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
312 don't see how else this can be handled, since in this case we
313 must preserve all externally visible symbols. */
314 if (link_info.relocateable && link_info.strip == strip_all)
316 link_info.strip = strip_debugger;
317 if (link_info.discard == discard_sec_merge)
318 link_info.discard = discard_all;
321 /* This essentially adds another -L directory so this must be done after
322 the -L's in argv have been processed. */
325 /* If we have not already opened and parsed a linker script
326 read the emulation's appropriate default script. */
327 if (saved_script_handle == NULL)
330 char *s = ldemul_get_script (&isfile);
333 ldfile_open_command_file (s);
339 parser_input = input_script;
344 if (trace_file_tries)
346 if (saved_script_handle)
347 info_msg (_("using external linker script:"));
349 info_msg (_("using internal linker script:"));
350 info_msg ("\n==================================================\n");
352 if (saved_script_handle)
354 static const int ld_bufsz = 8193;
356 char *buf = xmalloc (ld_bufsz);
358 rewind (saved_script_handle);
359 while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0)
364 rewind (saved_script_handle);
371 info_msg (ldemul_get_script (&isfile));
374 info_msg ("\n==================================================\n");
379 if (!lang_has_input_file)
383 einfo (_("%P%F: no input files\n"));
388 info_msg (_("%P: mode %s\n"), emulation);
391 ldemul_after_parse ();
393 if (config.map_filename)
395 if (strcmp (config.map_filename, "-") == 0)
397 config.map_file = stdout;
401 config.map_file = fopen (config.map_filename, FOPEN_WT);
402 if (config.map_file == (FILE *) NULL)
404 bfd_set_error (bfd_error_system_call);
405 einfo (_("%P%F: cannot open map file %s: %E\n"),
406 config.map_filename);
413 /* Print error messages for any missing symbols, for any warning
414 symbols, and possibly multiple definitions. */
416 if (link_info.relocateable)
417 output_bfd->flags &= ~EXEC_P;
419 output_bfd->flags |= EXEC_P;
423 if (config.map_file != NULL)
425 if (command_line.cref)
426 output_cref (config.map_file != NULL ? config.map_file : stdout);
427 if (nocrossref_list != NULL)
428 check_nocrossrefs ();
430 /* Even if we're producing relocateable output, some non-fatal errors should
431 be reported in the exit status. (What non-fatal errors, if any, do we
432 want to ignore for relocateable output?) */
434 if (!config.make_executable && !force_make_executable)
438 einfo (_("%P: link errors found, deleting executable `%s'\n"),
442 /* The file will be removed by remove_output. */
448 if (! bfd_close (output_bfd))
449 einfo (_("%F%B: final close failed: %E\n"), output_bfd);
451 /* If the --force-exe-suffix is enabled, and we're making an
452 executable file and it doesn't end in .exe, copy it to one
454 if (! link_info.relocateable && command_line.force_exe_suffix)
456 int len = strlen (output_filename);
458 || (strcasecmp (output_filename + len - 4, ".exe") != 0
459 && strcasecmp (output_filename + len - 4, ".dll") != 0))
463 const int bsize = 4096;
464 char *buf = xmalloc (bsize);
466 char *dst_name = xmalloc (len + 5);
467 strcpy (dst_name, output_filename);
468 strcat (dst_name, ".exe");
469 src = fopen (output_filename, FOPEN_RB);
470 dst = fopen (dst_name, FOPEN_WB);
473 einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename);
475 einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name);
476 while ((l = fread (buf, 1, bsize, src)) > 0)
478 int done = fwrite (buf, 1, l, dst);
481 einfo (_("%P: Error writing file `%s'\n"), dst_name);
485 if (fclose (dst) == EOF)
487 einfo (_("%P: Error closing file `%s'\n"), dst_name);
495 END_PROGRESS (program_name);
500 char *lim = (char *) sbrk (0);
502 long run_time = get_run_time () - start_time;
504 fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"),
505 program_name, run_time / 1000000, run_time % 1000000);
507 fprintf (stderr, _("%s: data size %ld\n"), program_name,
508 (long) (lim - (char *) &environ));
512 /* Prevent remove_output from doing anything, after a successful link. */
513 output_filename = NULL;
519 /* We need to find any explicitly given emulation in order to initialize the
520 state that's needed by the lex&yacc argument parser (parse_args). */
523 get_emulation (argc, argv)
530 emulation = getenv (EMULATION_ENVIRON);
531 if (emulation == NULL)
532 emulation = DEFAULT_EMULATION;
534 for (i = 1; i < argc; i++)
536 if (!strncmp (argv[i], "-m", 2))
538 if (argv[i][2] == '\0')
543 emulation = argv[i + 1];
548 einfo (_("%P%F: missing argument to -m\n"));
551 else if (strcmp (argv[i], "-mips1") == 0
552 || strcmp (argv[i], "-mips2") == 0
553 || strcmp (argv[i], "-mips3") == 0
554 || strcmp (argv[i], "-mips32") == 0
555 || strcmp (argv[i], "-mips64") == 0
556 || strcmp (argv[i], "-mips4") == 0
557 || strcmp (argv[i], "-mips5") == 0)
559 /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are
560 passed to the linker by some MIPS compilers. They
561 generally tell the linker to use a slightly different
562 library path. Perhaps someday these should be
563 implemented as emulations; until then, we just ignore
564 the arguments and hope that nobody ever creates
565 emulations named ips1, ips2 or ips3. */
567 else if (strcmp (argv[i], "-m486") == 0)
569 /* FIXME: The argument -m486 is passed to the linker on
570 some Linux systems. Hope that nobody creates an
571 emulation named 486. */
576 emulation = &argv[i][2];
584 /* If directory DIR contains an "ldscripts" subdirectory,
585 add DIR to the library search path and return TRUE,
586 else return FALSE. */
589 check_for_scripts_dir (dir)
597 dirlen = strlen (dir);
598 /* sizeof counts the terminating NUL. */
599 buf = (char *) xmalloc (dirlen + sizeof ("/ldscripts"));
600 sprintf (buf, "%s/ldscripts", dir);
602 res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
605 ldfile_add_library_path (dir, FALSE);
609 /* Set the default directory for finding script files.
610 Libraries will be searched for here too, but that's ok.
611 We look for the "ldscripts" directory in:
613 SCRIPTDIR (passed from Makefile)
614 the dir where this program is (for using it from the build tree)
615 the dir where this program is/../lib (for installing the tool suite elsewhere) */
623 if (check_for_scripts_dir (SCRIPTDIR))
624 /* We've been installed normally. */
627 /* Look for "ldscripts" in the dir where our binary is. */
628 end = strrchr (program_name, '/');
629 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
631 /* We could have \foo\bar, or /foo\bar. */
632 char *bslash = strrchr (program_name, '\\');
633 if (end == NULL || (bslash != NULL && bslash > end))
640 /* Don't look for ldscripts in the current directory. There is
641 too much potential for confusion. */
645 dirlen = end - program_name;
646 /* Make a copy of program_name in dir.
647 Leave room for later "/../lib". */
648 dir = (char *) xmalloc (dirlen + 8);
649 strncpy (dir, program_name, dirlen);
652 if (check_for_scripts_dir (dir))
653 /* Don't free dir. */
656 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */
657 strcpy (dir + dirlen, "/../lib");
658 if (check_for_scripts_dir (dir))
661 /* Well, we tried. */
669 if (link_info.notice_hash == (struct bfd_hash_table *) NULL)
671 link_info.notice_hash = ((struct bfd_hash_table *)
672 xmalloc (sizeof (struct bfd_hash_table)));
673 if (! bfd_hash_table_init_n (link_info.notice_hash,
676 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
679 if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE)
680 == (struct bfd_hash_entry *) NULL)
681 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
684 /* Record a symbol to be wrapped, from the --wrap option. */
690 if (link_info.wrap_hash == NULL)
692 link_info.wrap_hash = ((struct bfd_hash_table *)
693 xmalloc (sizeof (struct bfd_hash_table)));
694 if (! bfd_hash_table_init_n (link_info.wrap_hash,
697 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
699 if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL)
700 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
703 /* Handle the -retain-symbols-file option. */
706 add_keepsyms_file (filename)
707 const char *filename;
714 if (link_info.strip == strip_some)
715 einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
717 file = fopen (filename, "r");
718 if (file == (FILE *) NULL)
720 bfd_set_error (bfd_error_system_call);
721 einfo ("%X%P: %s: %E\n", filename);
725 link_info.keep_hash = ((struct bfd_hash_table *)
726 xmalloc (sizeof (struct bfd_hash_table)));
727 if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc))
728 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
731 buf = (char *) xmalloc (bufsize);
743 while (! ISSPACE (c) && c != EOF)
750 buf = xrealloc (buf, bufsize);
757 if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE)
758 == (struct bfd_hash_entry *) NULL)
759 einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
763 if (link_info.strip != strip_none)
764 einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
766 link_info.strip = strip_some;
769 /* Callbacks from the BFD linker routines. */
771 /* This is called when BFD has decided to include an archive member in
775 add_archive_element (info, abfd, name)
776 struct bfd_link_info *info ATTRIBUTE_UNUSED;
780 lang_input_statement_type *input;
782 input = ((lang_input_statement_type *)
783 xmalloc (sizeof (lang_input_statement_type)));
784 input->filename = abfd->filename;
785 input->local_sym_name = abfd->filename;
786 input->the_bfd = abfd;
787 input->asymbols = NULL;
789 input->just_syms_flag = FALSE;
790 input->loaded = FALSE;
791 input->search_dirs_flag = FALSE;
793 /* FIXME: The following fields are not set: header.next,
794 header.type, closed, passive_position, symbol_count,
795 next_real_file, is_archive, target, real. This bit of code is
796 from the old decode_library_subfile function. I don't know
797 whether any of those fields matters. */
799 ldlang_add_file (input);
801 if (config.map_file != (FILE *) NULL)
803 static bfd_boolean header_printed;
804 struct bfd_link_hash_entry *h;
808 h = bfd_link_hash_lookup (link_info.hash, name, FALSE, FALSE, TRUE);
820 case bfd_link_hash_defined:
821 case bfd_link_hash_defweak:
822 from = h->u.def.section->owner;
825 case bfd_link_hash_undefined:
826 case bfd_link_hash_undefweak:
827 from = h->u.undef.abfd;
830 case bfd_link_hash_common:
831 from = h->u.c.p->section->owner;
836 if (! header_printed)
840 sprintf (buf, _("Archive member included because of file (symbol)\n\n"));
842 header_printed = TRUE;
845 if (bfd_my_archive (abfd) == NULL)
847 minfo ("%s", bfd_get_filename (abfd));
848 len = strlen (bfd_get_filename (abfd));
852 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)),
853 bfd_get_filename (abfd));
854 len = (strlen (bfd_get_filename (bfd_my_archive (abfd)))
855 + strlen (bfd_get_filename (abfd))
873 minfo ("(%T)\n", h->root.string);
875 minfo ("(%s)\n", name);
878 if (trace_files || trace_file_tries)
879 info_msg ("%I\n", input);
884 /* This is called when BFD has discovered a symbol which is defined
888 multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval)
889 struct bfd_link_info *info ATTRIBUTE_UNUSED;
898 /* If either section has the output_section field set to
899 bfd_abs_section_ptr, it means that the section is being
900 discarded, and this is not really a multiple definition at all.
901 FIXME: It would be cleaner to somehow ignore symbols defined in
902 sections which are being discarded. */
903 if ((osec->output_section != NULL
904 && ! bfd_is_abs_section (osec)
905 && bfd_is_abs_section (osec->output_section))
906 || (nsec->output_section != NULL
907 && ! bfd_is_abs_section (nsec)
908 && bfd_is_abs_section (nsec->output_section)))
911 einfo (_("%X%C: multiple definition of `%T'\n"),
912 nbfd, nsec, nval, name);
913 if (obfd != (bfd *) NULL)
914 einfo (_("%D: first defined here\n"), obfd, osec, oval);
916 if (command_line.relax)
918 einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n"));
919 command_line.relax = 0;
925 /* This is called when there is a definition of a common symbol, or
926 when a common symbol is found for a symbol that is already defined,
927 or when two common symbols are found. We only do something if
928 -warn-common was used. */
931 multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize)
932 struct bfd_link_info *info ATTRIBUTE_UNUSED;
935 enum bfd_link_hash_type otype;
938 enum bfd_link_hash_type ntype;
941 if (! config.warn_common)
944 if (ntype == bfd_link_hash_defined
945 || ntype == bfd_link_hash_defweak
946 || ntype == bfd_link_hash_indirect)
948 ASSERT (otype == bfd_link_hash_common);
949 einfo (_("%B: warning: definition of `%T' overriding common\n"),
952 einfo (_("%B: warning: common is here\n"), obfd);
954 else if (otype == bfd_link_hash_defined
955 || otype == bfd_link_hash_defweak
956 || otype == bfd_link_hash_indirect)
958 ASSERT (ntype == bfd_link_hash_common);
959 einfo (_("%B: warning: common of `%T' overridden by definition\n"),
962 einfo (_("%B: warning: defined here\n"), obfd);
966 ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common);
969 einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
972 einfo (_("%B: warning: larger common is here\n"), obfd);
974 else if (nsize > osize)
976 einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
979 einfo (_("%B: warning: smaller common is here\n"), obfd);
983 einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name);
985 einfo (_("%B: warning: previous common is here\n"), obfd);
992 /* This is called when BFD has discovered a set element. H is the
993 entry in the linker hash table for the set. SECTION and VALUE
994 represent a value which should be added to the set. */
997 add_to_set (info, h, reloc, abfd, section, value)
998 struct bfd_link_info *info ATTRIBUTE_UNUSED;
999 struct bfd_link_hash_entry *h;
1000 bfd_reloc_code_real_type reloc;
1005 if (config.warn_constructors)
1006 einfo (_("%P: warning: global constructor %s used\n"),
1009 if (! config.build_constructors)
1012 ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value);
1014 if (h->type == bfd_link_hash_new)
1016 h->type = bfd_link_hash_undefined;
1017 h->u.undef.abfd = abfd;
1018 /* We don't call bfd_link_add_undef to add this to the list of
1019 undefined symbols because we are going to define it
1026 /* This is called when BFD has discovered a constructor. This is only
1027 called for some object file formats--those which do not handle
1028 constructors in some more clever fashion. This is similar to
1029 adding an element to a set, but less general. */
1032 constructor_callback (info, constructor, name, abfd, section, value)
1033 struct bfd_link_info *info;
1034 bfd_boolean constructor;
1041 struct bfd_link_hash_entry *h;
1042 char set_name[1 + sizeof "__CTOR_LIST__"];
1044 if (config.warn_constructors)
1045 einfo (_("%P: warning: global constructor %s used\n"), name);
1047 if (! config.build_constructors)
1050 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
1051 useful error message. */
1052 if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL
1053 && (link_info.relocateable
1054 || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
1055 einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
1058 if (bfd_get_symbol_leading_char (abfd) != '\0')
1059 *s++ = bfd_get_symbol_leading_char (abfd);
1061 strcpy (s, "__CTOR_LIST__");
1063 strcpy (s, "__DTOR_LIST__");
1065 h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE);
1066 if (h == (struct bfd_link_hash_entry *) NULL)
1067 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
1068 if (h->type == bfd_link_hash_new)
1070 h->type = bfd_link_hash_undefined;
1071 h->u.undef.abfd = abfd;
1072 /* We don't call bfd_link_add_undef to add this to the list of
1073 undefined symbols because we are going to define it
1077 ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value);
1081 /* A structure used by warning_callback to pass information through
1082 bfd_map_over_sections. */
1084 struct warning_callback_info {
1086 const char *warning;
1091 /* This is called when there is a reference to a warning symbol. */
1094 warning_callback (info, warning, symbol, abfd, section, address)
1095 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1096 const char *warning;
1102 /* This is a hack to support warn_multiple_gp. FIXME: This should
1103 have a cleaner interface, but what? */
1104 if (! config.warn_multiple_gp
1105 && strcmp (warning, "using multiple gp values") == 0)
1108 if (section != NULL)
1109 einfo ("%C: %s\n", abfd, section, address, warning);
1110 else if (abfd == NULL)
1111 einfo ("%P: %s\n", warning);
1112 else if (symbol == NULL)
1113 einfo ("%B: %s\n", abfd, warning);
1116 lang_input_statement_type *entry;
1118 struct warning_callback_info info;
1120 /* Look through the relocs to see if we can find a plausible
1123 entry = (lang_input_statement_type *) abfd->usrdata;
1124 if (entry != NULL && entry->asymbols != NULL)
1125 asymbols = entry->asymbols;
1131 symsize = bfd_get_symtab_upper_bound (abfd);
1133 einfo (_("%B%F: could not read symbols: %E\n"), abfd);
1134 asymbols = (asymbol **) xmalloc (symsize);
1135 symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
1136 if (symbol_count < 0)
1137 einfo (_("%B%F: could not read symbols: %E\n"), abfd);
1140 entry->asymbols = asymbols;
1141 entry->symbol_count = symbol_count;
1146 info.warning = warning;
1147 info.symbol = symbol;
1148 info.asymbols = asymbols;
1149 bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info);
1152 einfo ("%B: %s\n", abfd, warning);
1161 /* This is called by warning_callback for each section. It checks the
1162 relocs of the section to see if it can find a reference to the
1163 symbol which triggered the warning. If it can, it uses the reloc
1164 to give an error message with a file and line number. */
1167 warning_find_reloc (abfd, sec, iarg)
1172 struct warning_callback_info *info = (struct warning_callback_info *) iarg;
1176 arelent **p, **pend;
1181 relsize = bfd_get_reloc_upper_bound (abfd, sec);
1183 einfo (_("%B%F: could not read relocs: %E\n"), abfd);
1187 relpp = (arelent **) xmalloc (relsize);
1188 relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols);
1190 einfo (_("%B%F: could not read relocs: %E\n"), abfd);
1193 pend = p + relcount;
1194 for (; p < pend && *p != NULL; p++)
1198 if (q->sym_ptr_ptr != NULL
1199 && *q->sym_ptr_ptr != NULL
1200 && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0)
1202 /* We found a reloc for the symbol we are looking for. */
1203 einfo ("%C: %s\n", abfd, sec, q->address, info->warning);
1212 /* This is called when an undefined symbol is found. */
1215 undefined_symbol (info, name, abfd, section, address, fatal)
1216 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1221 bfd_boolean fatal ATTRIBUTE_UNUSED;
1223 static char *error_name;
1224 static unsigned int error_count;
1226 #define MAX_ERRORS_IN_A_ROW 5
1228 if (config.warn_once)
1230 static struct bfd_hash_table *hash;
1232 /* Only warn once about a particular undefined symbol. */
1236 hash = ((struct bfd_hash_table *)
1237 xmalloc (sizeof (struct bfd_hash_table)));
1238 if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
1239 einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
1242 if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL)
1245 if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
1246 einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
1249 /* We never print more than a reasonable number of errors in a row
1250 for a single symbol. */
1251 if (error_name != (char *) NULL
1252 && strcmp (name, error_name) == 0)
1257 if (error_name != (char *) NULL)
1259 error_name = xstrdup (name);
1262 if (section != NULL)
1264 if (error_count < MAX_ERRORS_IN_A_ROW)
1266 einfo (_("%C: undefined reference to `%T'\n"),
1267 abfd, section, address, name);
1271 else if (error_count == MAX_ERRORS_IN_A_ROW)
1272 einfo (_("%D: more undefined references to `%T' follow\n"),
1273 abfd, section, address, name);
1277 if (error_count < MAX_ERRORS_IN_A_ROW)
1279 einfo (_("%B: undefined reference to `%T'\n"),
1284 else if (error_count == MAX_ERRORS_IN_A_ROW)
1285 einfo (_("%B: more undefined references to `%T' follow\n"),
1292 /* This is called when a reloc overflows. */
1295 reloc_overflow (info, name, reloc_name, addend, abfd, section, address)
1296 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1298 const char *reloc_name;
1304 if (abfd == (bfd *) NULL)
1305 einfo (_("%P%X: generated"));
1307 einfo ("%X%C:", abfd, section, address);
1308 einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name);
1310 einfo ("+%v", addend);
1315 /* This is called when a dangerous relocation is made. */
1318 reloc_dangerous (info, message, abfd, section, address)
1319 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1320 const char *message;
1325 if (abfd == (bfd *) NULL)
1326 einfo (_("%P%X: generated"));
1328 einfo ("%X%C:", abfd, section, address);
1329 einfo (_("dangerous relocation: %s\n"), message);
1333 /* This is called when a reloc is being generated attached to a symbol
1334 that is not being output. */
1337 unattached_reloc (info, name, abfd, section, address)
1338 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1344 if (abfd == (bfd *) NULL)
1345 einfo (_("%P%X: generated"));
1347 einfo ("%X%C:", abfd, section, address);
1348 einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name);
1352 /* This is called if link_info.notice_all is set, or when a symbol in
1353 link_info.notice_hash is found. Symbols are put in notice_hash
1354 using the -y option. */
1357 notice (info, name, abfd, section, value)
1358 struct bfd_link_info *info;
1364 if (! info->notice_all
1365 || (info->notice_hash != NULL
1366 && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL))
1368 if (bfd_is_und_section (section))
1369 einfo ("%B: reference to %s\n", abfd, name);
1371 einfo ("%B: definition of %s\n", abfd, name);
1374 if (command_line.cref || nocrossref_list != NULL)
1375 add_cref (name, abfd, section, value);