1 /* Main program of GNU linker.
2 Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation, Inc.
4 Written by Steve Chamberlain steve@cygnus.com
6 This file is part of GLD, the Gnu Linker.
8 GLD is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GLD is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GLD; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
27 #include "libiberty.h"
43 /* Somewhere above, sys/stat.h got included . . . . */
44 #if !defined(S_ISDIR) && defined(S_IFDIR)
45 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
51 #ifdef NEED_DECLARATION_SBRK
56 static char *get_emulation PARAMS ((int, char **));
57 static void set_scripts_dir PARAMS ((void));
62 const char *output_filename = "a.out";
64 /* Name this program was invoked by. */
67 /* The file that we're creating */
70 /* Set by -G argument, for MIPS ECOFF target. */
71 int g_switch_value = 8;
73 /* Nonzero means print names of input files as processed. */
76 /* Nonzero means same, but note open failures, too. */
77 boolean trace_file_tries;
79 /* Nonzero means version number was printed, so exit successfully
80 instead of complaining if no input files are given. */
81 boolean version_printed;
83 /* Nonzero means link in every member of an archive. */
84 boolean whole_archive;
86 /* True if we should demangle symbol names. */
89 args_type command_line;
91 ld_config_type config;
93 static void remove_output PARAMS ((void));
94 static boolean check_for_scripts_dir PARAMS ((char *dir));
95 static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *,
97 static boolean multiple_definition PARAMS ((struct bfd_link_info *,
99 bfd *, asection *, bfd_vma,
100 bfd *, asection *, bfd_vma));
101 static boolean multiple_common PARAMS ((struct bfd_link_info *,
103 enum bfd_link_hash_type, bfd_vma,
104 bfd *, enum bfd_link_hash_type,
106 static boolean add_to_set PARAMS ((struct bfd_link_info *,
107 struct bfd_link_hash_entry *,
108 bfd_reloc_code_real_type,
109 bfd *, asection *, bfd_vma));
110 static boolean constructor_callback PARAMS ((struct bfd_link_info *,
113 bfd *, asection *, bfd_vma));
114 static boolean warning_callback PARAMS ((struct bfd_link_info *,
115 const char *, const char *, bfd *,
116 asection *, bfd_vma));
117 static void warning_find_reloc PARAMS ((bfd *, asection *, PTR));
118 static boolean undefined_symbol PARAMS ((struct bfd_link_info *,
120 asection *, bfd_vma));
121 static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *,
122 const char *, bfd_vma,
123 bfd *, asection *, bfd_vma));
124 static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *,
125 bfd *, asection *, bfd_vma));
126 static boolean unattached_reloc PARAMS ((struct bfd_link_info *,
127 const char *, bfd *, asection *,
129 static boolean notice PARAMS ((struct bfd_link_info *, const char *,
130 bfd *, asection *, bfd_vma));
132 static struct bfd_link_callbacks link_callbacks =
138 constructor_callback,
147 struct bfd_link_info link_info;
154 if (output_bfd && output_bfd->iostream)
155 fclose((FILE *)(output_bfd->iostream));
156 if (delete_output_file_on_failure)
157 unlink (output_filename);
167 long start_time = get_run_time ();
169 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
170 setlocale (LC_MESSAGES, "");
172 bindtextdomain (PACKAGE, LOCALEDIR);
173 textdomain (PACKAGE);
175 program_name = argv[0];
176 xmalloc_set_program_name (program_name);
178 START_PROGRESS (program_name, 0);
182 bfd_set_error_program_name (program_name);
184 xatexit (remove_output);
186 /* Set the default BFD target based on the configured target. Doing
187 this permits the linker to be configured for a particular target,
188 and linked against a shared BFD library which was configured for
189 a different target. The macro TARGET is defined by Makefile. */
190 if (! bfd_set_default_target (TARGET))
192 einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET);
196 /* Initialize the data about options. */
197 trace_files = trace_file_tries = version_printed = false;
198 whole_archive = false;
199 config.build_constructors = true;
200 config.dynamic_link = false;
201 config.has_shared = false;
202 command_line.force_common_definition = false;
203 command_line.interpreter = NULL;
204 command_line.rpath = NULL;
205 command_line.warn_mismatch = true;
206 command_line.check_section_addresses = true;
208 /* We initialize DEMANGLING based on the environment variable
209 COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
210 output of the linker, unless COLLECT_NO_DEMANGLE is set in the
211 environment. Acting the same way here lets us provide the same
212 interface by default. */
213 demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL;
215 link_info.callbacks = &link_callbacks;
216 link_info.relocateable = false;
217 link_info.shared = false;
218 link_info.symbolic = false;
219 link_info.static_link = false;
220 link_info.traditional_format = false;
221 link_info.optimize = false;
222 link_info.no_undefined = false;
223 link_info.strip = strip_none;
224 link_info.discard = discard_none;
225 link_info.keep_memory = true;
226 link_info.input_bfds = NULL;
227 link_info.create_object_symbols_section = NULL;
228 link_info.hash = NULL;
229 link_info.keep_hash = NULL;
230 link_info.notice_all = false;
231 link_info.notice_hash = NULL;
232 link_info.wrap_hash = NULL;
233 link_info.mpc860c0 = 0;
234 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init
235 and _fini symbols. We are compatible. */
236 link_info.init_function = "_init";
237 link_info.fini_function = "_fini";
239 ldfile_add_arch ("");
241 config.make_executable = true;
242 force_make_executable = false;
243 config.magic_demand_paged = true;
244 config.text_read_only = true;
245 config.make_executable = true;
247 emulation = get_emulation (argc, argv);
248 ldemul_choose_mode (emulation);
249 default_target = ldemul_choose_target ();
251 ldemul_before_parse ();
252 lang_has_input_file = false;
253 parse_args (argc, argv);
255 ldemul_set_symbols ();
257 if (link_info.relocateable)
259 if (command_line.gc_sections)
260 einfo ("%P%F: --gc-sections and -r may not be used together\n");
261 if (link_info.mpc860c0)
262 einfo (_("%P%F: -r and --mpc860c0 may not be used together\n"));
263 else if (command_line.relax)
264 einfo (_("%P%F: --relax and -r may not be used together\n"));
265 if (link_info.shared)
266 einfo (_("%P%F: -r and -shared may not be used together\n"));
269 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
270 don't see how else this can be handled, since in this case we
271 must preserve all externally visible symbols. */
272 if (link_info.relocateable && link_info.strip == strip_all)
274 link_info.strip = strip_debugger;
275 if (link_info.discard == discard_none)
276 link_info.discard = discard_all;
279 /* This essentially adds another -L directory so this must be done after
280 the -L's in argv have been processed. */
283 if (had_script == false)
285 /* Read the emulation's appropriate default script. */
287 char *s = ldemul_get_script (&isfile);
290 ldfile_open_command_file (s);
293 if (trace_file_tries)
295 info_msg (_("using internal linker script:\n"));
296 info_msg ("==================================================\n");
298 info_msg ("\n==================================================\n");
303 parser_input = input_script;
310 if (lang_has_input_file == false)
314 einfo (_("%P%F: no input files\n"));
319 info_msg (_("%P: mode %s\n"), emulation);
322 ldemul_after_parse ();
325 if (config.map_filename)
327 if (strcmp (config.map_filename, "-") == 0)
329 config.map_file = stdout;
333 config.map_file = fopen (config.map_filename, FOPEN_WT);
334 if (config.map_file == (FILE *) NULL)
336 bfd_set_error (bfd_error_system_call);
337 einfo (_("%P%F: cannot open map file %s: %E\n"),
338 config.map_filename);
346 /* Print error messages for any missing symbols, for any warning
347 symbols, and possibly multiple definitions */
350 if (config.text_read_only)
352 /* Look for a text section and mark the readonly attribute in it */
353 asection *found = bfd_get_section_by_name (output_bfd, ".text");
355 if (found != (asection *) NULL)
357 found->flags |= SEC_READONLY;
361 if (link_info.relocateable)
362 output_bfd->flags &= ~EXEC_P;
364 output_bfd->flags |= EXEC_P;
368 if (config.map_file != NULL)
370 if (command_line.cref)
371 output_cref (config.map_file != NULL ? config.map_file : stdout);
372 if (nocrossref_list != NULL)
373 check_nocrossrefs ();
375 /* Even if we're producing relocateable output, some non-fatal errors should
376 be reported in the exit status. (What non-fatal errors, if any, do we
377 want to ignore for relocateable output?) */
379 if (config.make_executable == false && force_make_executable == false)
381 if (trace_files == true)
383 einfo (_("%P: link errors found, deleting executable `%s'\n"),
387 /* The file will be removed by remove_output. */
393 if (! bfd_close (output_bfd))
394 einfo (_("%F%B: final close failed: %E\n"), output_bfd);
396 /* If the --force-exe-suffix is enabled, and we're making an
397 executable file and it doesn't end in .exe, copy it to one which does. */
399 if (! link_info.relocateable && command_line.force_exe_suffix)
401 int len = strlen (output_filename);
403 || (strcasecmp (output_filename + len - 4, ".exe") != 0
404 && strcasecmp (output_filename + len - 4, ".dll") != 0))
408 const int bsize = 4096;
409 char *buf = xmalloc (bsize);
411 char *dst_name = xmalloc (len + 5);
412 strcpy (dst_name, output_filename);
413 strcat (dst_name, ".exe");
414 src = fopen (output_filename, FOPEN_RB);
415 dst = fopen (dst_name, FOPEN_WB);
418 einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename);
420 einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name);
421 while ((l = fread (buf, 1, bsize, src)) > 0)
423 int done = fwrite (buf, 1, l, dst);
426 einfo (_("%P: Error writing file `%s'\n"), dst_name);
430 if (fclose (dst) == EOF)
432 einfo (_("%P: Error closing file `%s'\n"), dst_name);
440 END_PROGRESS (program_name);
445 char *lim = (char *) sbrk (0);
447 long run_time = get_run_time () - start_time;
449 fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"),
450 program_name, run_time / 1000000, run_time % 1000000);
452 fprintf (stderr, _("%s: data size %ld\n"), program_name,
453 (long) (lim - (char *) &environ));
457 /* Prevent remove_output from doing anything, after a successful link. */
458 output_filename = NULL;
464 /* We need to find any explicitly given emulation in order to initialize the
465 state that's needed by the lex&yacc argument parser (parse_args). */
468 get_emulation (argc, argv)
475 emulation = getenv (EMULATION_ENVIRON);
476 if (emulation == NULL)
477 emulation = DEFAULT_EMULATION;
479 for (i = 1; i < argc; i++)
481 if (!strncmp (argv[i], "-m", 2))
483 if (argv[i][2] == '\0')
488 emulation = argv[i + 1];
493 einfo(_("%P%F: missing argument to -m\n"));
496 else if (strcmp (argv[i], "-mips1") == 0
497 || strcmp (argv[i], "-mips2") == 0
498 || strcmp (argv[i], "-mips3") == 0
499 || strcmp (argv[i], "-mips4") == 0)
501 /* FIXME: The arguments -mips1, -mips2 and -mips3 are
502 passed to the linker by some MIPS compilers. They
503 generally tell the linker to use a slightly different
504 library path. Perhaps someday these should be
505 implemented as emulations; until then, we just ignore
506 the arguments and hope that nobody ever creates
507 emulations named ips1, ips2 or ips3. */
509 else if (strcmp (argv[i], "-m486") == 0)
511 /* FIXME: The argument -m486 is passed to the linker on
512 some Linux systems. Hope that nobody creates an
513 emulation named 486. */
518 emulation = &argv[i][2];
526 /* If directory DIR contains an "ldscripts" subdirectory,
527 add DIR to the library search path and return true,
528 else return false. */
531 check_for_scripts_dir (dir)
539 dirlen = strlen (dir);
540 /* sizeof counts the terminating NUL. */
541 buf = (char *) xmalloc (dirlen + sizeof("/ldscripts"));
542 sprintf (buf, "%s/ldscripts", dir);
544 res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
547 ldfile_add_library_path (dir, false);
551 /* Set the default directory for finding script files.
552 Libraries will be searched for here too, but that's ok.
553 We look for the "ldscripts" directory in:
555 SCRIPTDIR (passed from Makefile)
556 the dir where this program is (for using it from the build tree)
557 the dir where this program is/../lib (for installing the tool suite elsewhere) */
565 if (check_for_scripts_dir (SCRIPTDIR))
566 return; /* We've been installed normally. */
568 /* Look for "ldscripts" in the dir where our binary is. */
569 end = strrchr (program_name, '/');
573 /* Don't look for ldscripts in the current directory. There is
574 too much potential for confusion. */
578 dirlen = end - program_name;
579 /* Make a copy of program_name in dir.
580 Leave room for later "/../lib". */
581 dir = (char *) xmalloc (dirlen + 8);
582 strncpy (dir, program_name, dirlen);
585 if (check_for_scripts_dir (dir))
586 return; /* Don't free dir. */
588 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */
589 strcpy (dir + dirlen, "/../lib");
590 if (check_for_scripts_dir (dir))
593 free (dir); /* Well, we tried. */
600 if (link_info.notice_hash == (struct bfd_hash_table *) NULL)
602 link_info.notice_hash = ((struct bfd_hash_table *)
603 xmalloc (sizeof (struct bfd_hash_table)));
604 if (! bfd_hash_table_init_n (link_info.notice_hash,
607 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
610 if (bfd_hash_lookup (link_info.notice_hash, name, true, true)
611 == (struct bfd_hash_entry *) NULL)
612 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
615 /* Record a symbol to be wrapped, from the --wrap option. */
621 if (link_info.wrap_hash == NULL)
623 link_info.wrap_hash = ((struct bfd_hash_table *)
624 xmalloc (sizeof (struct bfd_hash_table)));
625 if (! bfd_hash_table_init_n (link_info.wrap_hash,
628 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
630 if (bfd_hash_lookup (link_info.wrap_hash, name, true, true) == NULL)
631 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
634 /* Handle the -retain-symbols-file option. */
637 add_keepsyms_file (filename)
638 const char *filename;
645 if (link_info.strip == strip_some)
646 einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
648 file = fopen (filename, "r");
649 if (file == (FILE *) NULL)
651 bfd_set_error (bfd_error_system_call);
652 einfo ("%X%P: %s: %E\n", filename);
656 link_info.keep_hash = ((struct bfd_hash_table *)
657 xmalloc (sizeof (struct bfd_hash_table)));
658 if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc))
659 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
662 buf = (char *) xmalloc (bufsize);
674 while (! isspace (c) && c != EOF)
681 buf = xrealloc (buf, bufsize);
688 if (bfd_hash_lookup (link_info.keep_hash, buf, true, true)
689 == (struct bfd_hash_entry *) NULL)
690 einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
694 if (link_info.strip != strip_none)
695 einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
697 link_info.strip = strip_some;
700 /* Callbacks from the BFD linker routines. */
702 /* This is called when BFD has decided to include an archive member in
707 add_archive_element (info, abfd, name)
708 struct bfd_link_info *info ATTRIBUTE_UNUSED;
712 lang_input_statement_type *input;
714 input = ((lang_input_statement_type *)
715 xmalloc (sizeof (lang_input_statement_type)));
716 input->filename = abfd->filename;
717 input->local_sym_name = abfd->filename;
718 input->the_bfd = abfd;
719 input->asymbols = NULL;
721 input->just_syms_flag = false;
722 input->loaded = false;
723 input->search_dirs_flag = false;
725 /* FIXME: The following fields are not set: header.next,
726 header.type, closed, passive_position, symbol_count,
727 next_real_file, is_archive, target, real. This bit of code is
728 from the old decode_library_subfile function. I don't know
729 whether any of those fields matters. */
731 ldlang_add_file (input);
733 if (config.map_file != (FILE *) NULL)
735 static boolean header_printed;
736 struct bfd_link_hash_entry *h;
740 h = bfd_link_hash_lookup (link_info.hash, name, false, false, true);
752 case bfd_link_hash_defined:
753 case bfd_link_hash_defweak:
754 from = h->u.def.section->owner;
757 case bfd_link_hash_undefined:
758 case bfd_link_hash_undefweak:
759 from = h->u.undef.abfd;
762 case bfd_link_hash_common:
763 from = h->u.c.p->section->owner;
768 if (! header_printed)
772 sprintf (buf, "%-29s %s\n\n", _("Archive member included"),
773 _("because of file (symbol)"));
775 header_printed = true;
778 if (bfd_my_archive (abfd) == NULL)
780 minfo ("%s", bfd_get_filename (abfd));
781 len = strlen (bfd_get_filename (abfd));
785 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)),
786 bfd_get_filename (abfd));
787 len = (strlen (bfd_get_filename (bfd_my_archive (abfd)))
788 + strlen (bfd_get_filename (abfd))
806 minfo ("(%T)\n", h->root.string);
808 minfo ("(%s)\n", name);
811 if (trace_files || trace_file_tries)
812 info_msg ("%I\n", input);
817 /* This is called when BFD has discovered a symbol which is defined
822 multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval)
823 struct bfd_link_info *info ATTRIBUTE_UNUSED;
832 /* If either section has the output_section field set to
833 bfd_abs_section_ptr, it means that the section is being
834 discarded, and this is not really a multiple definition at all.
835 FIXME: It would be cleaner to somehow ignore symbols defined in
836 sections which are being discarded. */
837 if ((osec->output_section != NULL
838 && ! bfd_is_abs_section (osec)
839 && bfd_is_abs_section (osec->output_section))
840 || (nsec->output_section != NULL
841 && ! bfd_is_abs_section (nsec)
842 && bfd_is_abs_section (nsec->output_section)))
845 einfo (_("%X%C: multiple definition of `%T'\n"),
846 nbfd, nsec, nval, name);
847 if (obfd != (bfd *) NULL)
848 einfo (_("%D: first defined here\n"), obfd, osec, oval);
852 /* This is called when there is a definition of a common symbol, or
853 when a common symbol is found for a symbol that is already defined,
854 or when two common symbols are found. We only do something if
855 -warn-common was used. */
859 multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize)
860 struct bfd_link_info *info ATTRIBUTE_UNUSED;
863 enum bfd_link_hash_type otype;
866 enum bfd_link_hash_type ntype;
869 if (! config.warn_common)
872 if (ntype == bfd_link_hash_defined
873 || ntype == bfd_link_hash_defweak
874 || ntype == bfd_link_hash_indirect)
876 ASSERT (otype == bfd_link_hash_common);
877 einfo (_("%B: warning: definition of `%T' overriding common\n"),
880 einfo (_("%B: warning: common is here\n"), obfd);
882 else if (otype == bfd_link_hash_defined
883 || otype == bfd_link_hash_defweak
884 || otype == bfd_link_hash_indirect)
886 ASSERT (ntype == bfd_link_hash_common);
887 einfo (_("%B: warning: common of `%T' overridden by definition\n"),
890 einfo (_("%B: warning: defined here\n"), obfd);
894 ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common);
897 einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
900 einfo (_("%B: warning: larger common is here\n"), obfd);
902 else if (nsize > osize)
904 einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
907 einfo (_("%B: warning: smaller common is here\n"), obfd);
911 einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name);
913 einfo (_("%B: warning: previous common is here\n"), obfd);
920 /* This is called when BFD has discovered a set element. H is the
921 entry in the linker hash table for the set. SECTION and VALUE
922 represent a value which should be added to the set. */
926 add_to_set (info, h, reloc, abfd, section, value)
927 struct bfd_link_info *info ATTRIBUTE_UNUSED;
928 struct bfd_link_hash_entry *h;
929 bfd_reloc_code_real_type reloc;
934 if (config.warn_constructors)
935 einfo (_("%P: warning: global constructor %s used\n"),
938 if (! config.build_constructors)
941 ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value);
943 if (h->type == bfd_link_hash_new)
945 h->type = bfd_link_hash_undefined;
946 h->u.undef.abfd = abfd;
947 /* We don't call bfd_link_add_undef to add this to the list of
948 undefined symbols because we are going to define it
955 /* This is called when BFD has discovered a constructor. This is only
956 called for some object file formats--those which do not handle
957 constructors in some more clever fashion. This is similar to
958 adding an element to a set, but less general. */
961 constructor_callback (info, constructor, name, abfd, section, value)
962 struct bfd_link_info *info;
970 struct bfd_link_hash_entry *h;
971 char set_name[1 + sizeof "__CTOR_LIST__"];
973 if (config.warn_constructors)
974 einfo (_("%P: warning: global constructor %s used\n"), name);
976 if (! config.build_constructors)
979 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
980 useful error message. */
981 if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL
982 && (link_info.relocateable
983 || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
984 einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
987 if (bfd_get_symbol_leading_char (abfd) != '\0')
988 *s++ = bfd_get_symbol_leading_char (abfd);
990 strcpy (s, "__CTOR_LIST__");
992 strcpy (s, "__DTOR_LIST__");
994 h = bfd_link_hash_lookup (info->hash, set_name, true, true, true);
995 if (h == (struct bfd_link_hash_entry *) NULL)
996 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
997 if (h->type == bfd_link_hash_new)
999 h->type = bfd_link_hash_undefined;
1000 h->u.undef.abfd = abfd;
1001 /* We don't call bfd_link_add_undef to add this to the list of
1002 undefined symbols because we are going to define it
1006 ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value);
1010 /* A structure used by warning_callback to pass information through
1011 bfd_map_over_sections. */
1013 struct warning_callback_info
1016 const char *warning;
1021 /* This is called when there is a reference to a warning symbol. */
1025 warning_callback (info, warning, symbol, abfd, section, address)
1026 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1027 const char *warning;
1033 /* This is a hack to support warn_multiple_gp. FIXME: This should
1034 have a cleaner interface, but what? */
1035 if (! config.warn_multiple_gp
1036 && strcmp (warning, "using multiple gp values") == 0)
1039 if (section != NULL)
1040 einfo ("%C: %s\n", abfd, section, address, warning);
1041 else if (abfd == NULL)
1042 einfo ("%P: %s\n", warning);
1043 else if (symbol == NULL)
1044 einfo ("%B: %s\n", abfd, warning);
1047 lang_input_statement_type *entry;
1049 struct warning_callback_info info;
1051 /* Look through the relocs to see if we can find a plausible
1054 entry = (lang_input_statement_type *) abfd->usrdata;
1055 if (entry != NULL && entry->asymbols != NULL)
1056 asymbols = entry->asymbols;
1062 symsize = bfd_get_symtab_upper_bound (abfd);
1064 einfo (_("%B%F: could not read symbols: %E\n"), abfd);
1065 asymbols = (asymbol **) xmalloc (symsize);
1066 symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
1067 if (symbol_count < 0)
1068 einfo (_("%B%F: could not read symbols: %E\n"), abfd);
1071 entry->asymbols = asymbols;
1072 entry->symbol_count = symbol_count;
1077 info.warning = warning;
1078 info.symbol = symbol;
1079 info.asymbols = asymbols;
1080 bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info);
1083 einfo ("%B: %s\n", abfd, warning);
1092 /* This is called by warning_callback for each section. It checks the
1093 relocs of the section to see if it can find a reference to the
1094 symbol which triggered the warning. If it can, it uses the reloc
1095 to give an error message with a file and line number. */
1098 warning_find_reloc (abfd, sec, iarg)
1103 struct warning_callback_info *info = (struct warning_callback_info *) iarg;
1107 arelent **p, **pend;
1112 relsize = bfd_get_reloc_upper_bound (abfd, sec);
1114 einfo (_("%B%F: could not read relocs: %E\n"), abfd);
1118 relpp = (arelent **) xmalloc (relsize);
1119 relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols);
1121 einfo (_("%B%F: could not read relocs: %E\n"), abfd);
1124 pend = p + relcount;
1125 for (; p < pend && *p != NULL; p++)
1129 if (q->sym_ptr_ptr != NULL
1130 && *q->sym_ptr_ptr != NULL
1131 && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0)
1133 /* We found a reloc for the symbol we are looking for. */
1134 einfo ("%C: %s\n", abfd, sec, q->address, info->warning);
1143 /* This is called when an undefined symbol is found. */
1147 undefined_symbol (info, name, abfd, section, address)
1148 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1154 static char *error_name;
1155 static unsigned int error_count;
1157 #define MAX_ERRORS_IN_A_ROW 5
1159 if (config.warn_once)
1161 static struct bfd_hash_table *hash;
1163 /* Only warn once about a particular undefined symbol. */
1167 hash = ((struct bfd_hash_table *)
1168 xmalloc (sizeof (struct bfd_hash_table)));
1169 if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
1170 einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
1173 if (bfd_hash_lookup (hash, name, false, false) != NULL)
1176 if (bfd_hash_lookup (hash, name, true, true) == NULL)
1177 einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
1180 /* We never print more than a reasonable number of errors in a row
1181 for a single symbol. */
1182 if (error_name != (char *) NULL
1183 && strcmp (name, error_name) == 0)
1188 if (error_name != (char *) NULL)
1190 error_name = buystring (name);
1193 if (section != NULL)
1195 if (error_count < MAX_ERRORS_IN_A_ROW)
1196 einfo (_("%X%C: undefined reference to `%T'\n"),
1197 abfd, section, address, name);
1198 else if (error_count == MAX_ERRORS_IN_A_ROW)
1199 einfo (_("%D: more undefined references to `%T' follow\n"),
1200 abfd, section, address, name);
1204 if (error_count < MAX_ERRORS_IN_A_ROW)
1205 einfo (_("%X%B: undefined reference to `%T'\n"),
1207 else if (error_count == MAX_ERRORS_IN_A_ROW)
1208 einfo (_("%B: more undefined references to `%T' follow\n"),
1215 /* This is called when a reloc overflows. */
1219 reloc_overflow (info, name, reloc_name, addend, abfd, section, address)
1220 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1222 const char *reloc_name;
1228 if (abfd == (bfd *) NULL)
1229 einfo (_("%P%X: generated"));
1231 einfo ("%X%C:", abfd, section, address);
1232 einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name);
1234 einfo ("+%v", addend);
1239 /* This is called when a dangerous relocation is made. */
1243 reloc_dangerous (info, message, abfd, section, address)
1244 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1245 const char *message;
1250 if (abfd == (bfd *) NULL)
1251 einfo (_("%P%X: generated"));
1253 einfo ("%X%C:", abfd, section, address);
1254 einfo (_("dangerous relocation: %s\n"), message);
1258 /* This is called when a reloc is being generated attached to a symbol
1259 that is not being output. */
1263 unattached_reloc (info, name, abfd, section, address)
1264 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1270 if (abfd == (bfd *) NULL)
1271 einfo (_("%P%X: generated"));
1273 einfo ("%X%C:", abfd, section, address);
1274 einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name);
1278 /* This is called if link_info.notice_all is set, or when a symbol in
1279 link_info.notice_hash is found. Symbols are put in notice_hash
1280 using the -y option. */
1283 notice (info, name, abfd, section, value)
1284 struct bfd_link_info *info;
1290 if (! info->notice_all
1291 || (info->notice_hash != NULL
1292 && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL))
1294 if (bfd_is_und_section (section))
1295 einfo ("%B: reference to %s\n", abfd, name);
1297 einfo ("%B: definition of %s\n", abfd, name);
1300 if (command_line.cref || nocrossref_list != NULL)
1301 add_cref (name, abfd, section, value);