1 /* Main program of GNU linker.
2 Copyright (C) 1991, 92, 93, 94, 95, 96, 1997, 1998 Free Software Foundation, Inc.
3 Written by Steve Chamberlain steve@cygnus.com
5 This file is part of GLD, the Gnu Linker.
7 GLD is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GLD is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GLD; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
26 #include "libiberty.h"
42 /* Somewhere above, sys/stat.h got included . . . . */
43 #if !defined(S_ISDIR) && defined(S_IFDIR)
44 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
50 #ifdef NEED_DECLARATION_SBRK
55 static char *get_emulation
PARAMS ((int, char **));
56 static void set_scripts_dir
PARAMS ((void));
61 const char *output_filename
= "a.out";
63 /* Name this program was invoked by. */
66 /* The file that we're creating */
69 /* Set by -G argument, for MIPS ECOFF target. */
70 int g_switch_value
= 8;
72 /* Nonzero means print names of input files as processed. */
75 /* Nonzero means same, but note open failures, too. */
76 boolean trace_file_tries
;
78 /* Nonzero means version number was printed, so exit successfully
79 instead of complaining if no input files are given. */
80 boolean version_printed
;
82 /* Nonzero means link in every member of an archive. */
83 boolean whole_archive
;
85 args_type command_line
;
87 ld_config_type config
;
89 static void remove_output
PARAMS ((void));
90 static boolean check_for_scripts_dir
PARAMS ((char *dir
));
91 static boolean add_archive_element
PARAMS ((struct bfd_link_info
*, bfd
*,
93 static boolean multiple_definition
PARAMS ((struct bfd_link_info
*,
95 bfd
*, asection
*, bfd_vma
,
96 bfd
*, asection
*, bfd_vma
));
97 static boolean multiple_common
PARAMS ((struct bfd_link_info
*,
99 enum bfd_link_hash_type
, bfd_vma
,
100 bfd
*, enum bfd_link_hash_type
,
102 static boolean add_to_set
PARAMS ((struct bfd_link_info
*,
103 struct bfd_link_hash_entry
*,
104 bfd_reloc_code_real_type
,
105 bfd
*, asection
*, bfd_vma
));
106 static boolean constructor_callback
PARAMS ((struct bfd_link_info
*,
109 bfd
*, asection
*, bfd_vma
));
110 static boolean warning_callback
PARAMS ((struct bfd_link_info
*,
111 const char *, const char *, bfd
*,
112 asection
*, bfd_vma
));
113 static void warning_find_reloc
PARAMS ((bfd
*, asection
*, PTR
));
114 static boolean undefined_symbol
PARAMS ((struct bfd_link_info
*,
116 asection
*, bfd_vma
));
117 static boolean reloc_overflow
PARAMS ((struct bfd_link_info
*, const char *,
118 const char *, bfd_vma
,
119 bfd
*, asection
*, bfd_vma
));
120 static boolean reloc_dangerous
PARAMS ((struct bfd_link_info
*, const char *,
121 bfd
*, asection
*, bfd_vma
));
122 static boolean unattached_reloc
PARAMS ((struct bfd_link_info
*,
123 const char *, bfd
*, asection
*,
125 static boolean notice
PARAMS ((struct bfd_link_info
*, const char *,
126 bfd
*, asection
*, bfd_vma
));
128 static struct bfd_link_callbacks link_callbacks
=
134 constructor_callback
,
143 struct bfd_link_info link_info
;
150 if (output_bfd
&& output_bfd
->iostream
)
151 fclose((FILE *)(output_bfd
->iostream
));
152 if (delete_output_file_on_failure
)
153 unlink (output_filename
);
163 long start_time
= get_run_time ();
165 setlocale (LC_MESSAGES
, "");
166 bindtextdomain (PACKAGE
, LOCALEDIR
);
167 textdomain (PACKAGE
);
169 program_name
= argv
[0];
170 xmalloc_set_program_name (program_name
);
172 START_PROGRESS (program_name
, 0);
176 bfd_set_error_program_name (program_name
);
178 xatexit (remove_output
);
180 /* Set the default BFD target based on the configured target. Doing
181 this permits the linker to be configured for a particular target,
182 and linked against a shared BFD library which was configured for
183 a different target. The macro TARGET is defined by Makefile. */
184 if (! bfd_set_default_target (TARGET
))
186 einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET
);
190 /* Initialize the data about options. */
191 trace_files
= trace_file_tries
= version_printed
= false;
192 whole_archive
= false;
193 config
.build_constructors
= true;
194 config
.dynamic_link
= false;
195 command_line
.force_common_definition
= false;
196 command_line
.interpreter
= NULL
;
197 command_line
.rpath
= NULL
;
198 command_line
.warn_mismatch
= true;
200 link_info
.callbacks
= &link_callbacks
;
201 link_info
.relocateable
= false;
202 link_info
.shared
= false;
203 link_info
.symbolic
= false;
204 link_info
.static_link
= false;
205 link_info
.traditional_format
= false;
206 link_info
.strip
= strip_none
;
207 link_info
.discard
= discard_none
;
208 link_info
.keep_memory
= true;
209 link_info
.input_bfds
= NULL
;
210 link_info
.create_object_symbols_section
= NULL
;
211 link_info
.hash
= NULL
;
212 link_info
.keep_hash
= NULL
;
213 link_info
.notice_all
= false;
214 link_info
.notice_hash
= NULL
;
215 link_info
.wrap_hash
= NULL
;
217 ldfile_add_arch ("");
219 config
.make_executable
= true;
220 force_make_executable
= false;
221 config
.magic_demand_paged
= true;
222 config
.text_read_only
= true;
223 config
.make_executable
= true;
225 emulation
= get_emulation (argc
, argv
);
226 ldemul_choose_mode (emulation
);
227 default_target
= ldemul_choose_target ();
229 ldemul_before_parse ();
230 lang_has_input_file
= false;
231 parse_args (argc
, argv
);
233 ldemul_set_symbols ();
235 if (link_info
.relocateable
)
237 if (command_line
.relax
)
238 einfo (_("%P%F: -relax and -r may not be used together\n"));
239 if (link_info
.shared
)
240 einfo (_("%P%F: -r and -shared may not be used together\n"));
243 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
244 don't see how else this can be handled, since in this case we
245 must preserve all externally visible symbols. */
246 if (link_info
.relocateable
&& link_info
.strip
== strip_all
)
248 link_info
.strip
= strip_debugger
;
249 if (link_info
.discard
== discard_none
)
250 link_info
.discard
= discard_all
;
253 /* This essentially adds another -L directory so this must be done after
254 the -L's in argv have been processed. */
257 if (had_script
== false)
259 /* Read the emulation's appropriate default script. */
261 char *s
= ldemul_get_script (&isfile
);
264 ldfile_open_command_file (s
);
267 if (trace_file_tries
)
269 info_msg (_("using internal linker script:\n"));
270 info_msg ("==================================================\n");
272 info_msg ("\n==================================================\n");
277 parser_input
= input_script
;
284 if (lang_has_input_file
== false)
288 einfo (_("%P%F: no input files\n"));
293 info_msg (_("%P: mode %s\n"), emulation
);
296 ldemul_after_parse ();
299 if (config
.map_filename
)
301 if (strcmp (config
.map_filename
, "-") == 0)
303 config
.map_file
= stdout
;
307 config
.map_file
= fopen (config
.map_filename
, FOPEN_WT
);
308 if (config
.map_file
== (FILE *) NULL
)
310 bfd_set_error (bfd_error_system_call
);
311 einfo (_("%P%F: cannot open map file %s: %E\n"),
312 config
.map_filename
);
320 /* Print error messages for any missing symbols, for any warning
321 symbols, and possibly multiple definitions */
324 if (config
.text_read_only
)
326 /* Look for a text section and mark the readonly attribute in it */
327 asection
*found
= bfd_get_section_by_name (output_bfd
, ".text");
329 if (found
!= (asection
*) NULL
)
331 found
->flags
|= SEC_READONLY
;
335 if (link_info
.relocateable
)
336 output_bfd
->flags
&= ~EXEC_P
;
338 output_bfd
->flags
|= EXEC_P
;
342 if (config
.map_file
!= NULL
)
344 if (command_line
.cref
)
345 output_cref (config
.map_file
!= NULL
? config
.map_file
: stdout
);
346 if (nocrossref_list
!= NULL
)
347 check_nocrossrefs ();
349 /* Even if we're producing relocateable output, some non-fatal errors should
350 be reported in the exit status. (What non-fatal errors, if any, do we
351 want to ignore for relocateable output?) */
353 if (config
.make_executable
== false && force_make_executable
== false)
355 if (trace_files
== true)
357 einfo (_("%P: link errors found, deleting executable `%s'\n"),
361 /* The file will be removed by remove_output. */
367 if (! bfd_close (output_bfd
))
368 einfo (_("%F%B: final close failed: %E\n"), output_bfd
);
370 /* If the --force-exe-suffix is enabled, and we're making an
371 executable file and it doesn't end in .exe, copy it to one which does. */
373 if (! link_info
.relocateable
&& command_line
.force_exe_suffix
)
375 int len
= strlen (output_filename
);
377 || (strcasecmp (output_filename
+ len
- 4, ".exe") != 0
378 && strcasecmp (output_filename
+ len
- 4, ".dll") != 0))
382 const int bsize
= 4096;
383 char *buf
= xmalloc (bsize
);
385 char *dst_name
= xmalloc (len
+ 5);
386 strcpy (dst_name
, output_filename
);
387 strcat (dst_name
, ".exe");
388 src
= fopen (output_filename
, FOPEN_RB
);
389 dst
= fopen (dst_name
, FOPEN_WB
);
392 einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename
);
394 einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name
);
395 while ((l
= fread (buf
, 1, bsize
, src
)) > 0)
397 int done
= fwrite (buf
, 1, l
, dst
);
400 einfo (_("%P: Error writing file `%s'\n"), dst_name
);
404 if (fclose (dst
) == EOF
)
406 einfo (_("%P: Error closing file `%s'\n"), dst_name
);
414 END_PROGRESS (program_name
);
418 extern char **environ
;
420 char *lim
= (char *) sbrk (0);
422 long run_time
= get_run_time () - start_time
;
424 fprintf (stderr
, _("%s: total time in link: %ld.%06ld\n"),
425 program_name
, run_time
/ 1000000, run_time
% 1000000);
427 fprintf (stderr
, _("%s: data size %ld\n"), program_name
,
428 (long) (lim
- (char *) &environ
));
432 /* Prevent remove_output from doing anything, after a successful link. */
433 output_filename
= NULL
;
439 /* We need to find any explicitly given emulation in order to initialize the
440 state that's needed by the lex&yacc argument parser (parse_args). */
443 get_emulation (argc
, argv
)
450 emulation
= getenv (EMULATION_ENVIRON
);
451 if (emulation
== NULL
)
452 emulation
= DEFAULT_EMULATION
;
454 for (i
= 1; i
< argc
; i
++)
456 if (!strncmp (argv
[i
], "-m", 2))
458 if (argv
[i
][2] == '\0')
463 emulation
= argv
[i
+ 1];
468 einfo(_("%P%F: missing argument to -m\n"));
471 else if (strcmp (argv
[i
], "-mips1") == 0
472 || strcmp (argv
[i
], "-mips2") == 0
473 || strcmp (argv
[i
], "-mips3") == 0
474 || strcmp (argv
[i
], "-mips4") == 0)
476 /* FIXME: The arguments -mips1, -mips2 and -mips3 are
477 passed to the linker by some MIPS compilers. They
478 generally tell the linker to use a slightly different
479 library path. Perhaps someday these should be
480 implemented as emulations; until then, we just ignore
481 the arguments and hope that nobody ever creates
482 emulations named ips1, ips2 or ips3. */
484 else if (strcmp (argv
[i
], "-m486") == 0)
486 /* FIXME: The argument -m486 is passed to the linker on
487 some Linux systems. Hope that nobody creates an
488 emulation named 486. */
493 emulation
= &argv
[i
][2];
501 /* If directory DIR contains an "ldscripts" subdirectory,
502 add DIR to the library search path and return true,
503 else return false. */
506 check_for_scripts_dir (dir
)
514 dirlen
= strlen (dir
);
515 /* sizeof counts the terminating NUL. */
516 buf
= (char *) xmalloc (dirlen
+ sizeof("/ldscripts"));
517 sprintf (buf
, "%s/ldscripts", dir
);
519 res
= stat (buf
, &s
) == 0 && S_ISDIR (s
.st_mode
);
522 ldfile_add_library_path (dir
, false);
526 /* Set the default directory for finding script files.
527 Libraries will be searched for here too, but that's ok.
528 We look for the "ldscripts" directory in:
530 SCRIPTDIR (passed from Makefile)
531 the dir where this program is (for using it from the build tree)
532 the dir where this program is/../lib (for installing the tool suite elsewhere) */
540 if (check_for_scripts_dir (SCRIPTDIR
))
541 return; /* We've been installed normally. */
543 /* Look for "ldscripts" in the dir where our binary is. */
544 end
= strrchr (program_name
, '/');
548 /* Don't look for ldscripts in the current directory. There is
549 too much potential for confusion. */
553 dirlen
= end
- program_name
;
554 /* Make a copy of program_name in dir.
555 Leave room for later "/../lib". */
556 dir
= (char *) xmalloc (dirlen
+ 8);
557 strncpy (dir
, program_name
, dirlen
);
560 if (check_for_scripts_dir (dir
))
561 return; /* Don't free dir. */
563 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */
564 strcpy (dir
+ dirlen
, "/../lib");
565 if (check_for_scripts_dir (dir
))
568 free (dir
); /* Well, we tried. */
575 if (link_info
.notice_hash
== (struct bfd_hash_table
*) NULL
)
577 link_info
.notice_hash
= ((struct bfd_hash_table
*)
578 xmalloc (sizeof (struct bfd_hash_table
)));
579 if (! bfd_hash_table_init_n (link_info
.notice_hash
,
582 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
585 if (bfd_hash_lookup (link_info
.notice_hash
, name
, true, true)
586 == (struct bfd_hash_entry
*) NULL
)
587 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
590 /* Record a symbol to be wrapped, from the --wrap option. */
596 if (link_info
.wrap_hash
== NULL
)
598 link_info
.wrap_hash
= ((struct bfd_hash_table
*)
599 xmalloc (sizeof (struct bfd_hash_table
)));
600 if (! bfd_hash_table_init_n (link_info
.wrap_hash
,
603 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
605 if (bfd_hash_lookup (link_info
.wrap_hash
, name
, true, true) == NULL
)
606 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
609 /* Handle the -retain-symbols-file option. */
612 add_keepsyms_file (filename
)
613 const char *filename
;
620 if (link_info
.strip
== strip_some
)
621 einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
623 file
= fopen (filename
, "r");
624 if (file
== (FILE *) NULL
)
626 bfd_set_error (bfd_error_system_call
);
627 einfo ("%X%P: %s: %E\n", filename
);
631 link_info
.keep_hash
= ((struct bfd_hash_table
*)
632 xmalloc (sizeof (struct bfd_hash_table
)));
633 if (! bfd_hash_table_init (link_info
.keep_hash
, bfd_hash_newfunc
))
634 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
637 buf
= (char *) xmalloc (bufsize
);
649 while (! isspace (c
) && c
!= EOF
)
656 buf
= xrealloc (buf
, bufsize
);
663 if (bfd_hash_lookup (link_info
.keep_hash
, buf
, true, true)
664 == (struct bfd_hash_entry
*) NULL
)
665 einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
669 if (link_info
.strip
!= strip_none
)
670 einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
672 link_info
.strip
= strip_some
;
675 /* Callbacks from the BFD linker routines. */
677 /* This is called when BFD has decided to include an archive member in
682 add_archive_element (info
, abfd
, name
)
683 struct bfd_link_info
*info
;
687 lang_input_statement_type
*input
;
689 input
= ((lang_input_statement_type
*)
690 xmalloc (sizeof (lang_input_statement_type
)));
691 input
->filename
= abfd
->filename
;
692 input
->local_sym_name
= abfd
->filename
;
693 input
->the_bfd
= abfd
;
694 input
->asymbols
= NULL
;
696 input
->just_syms_flag
= false;
697 input
->loaded
= false;
698 input
->search_dirs_flag
= false;
700 /* FIXME: The following fields are not set: header.next,
701 header.type, closed, passive_position, symbol_count,
702 next_real_file, is_archive, target, real. This bit of code is
703 from the old decode_library_subfile function. I don't know
704 whether any of those fields matters. */
706 ldlang_add_file (input
);
708 if (config
.map_file
!= (FILE *) NULL
)
710 static boolean header_printed
;
711 struct bfd_link_hash_entry
*h
;
715 h
= bfd_link_hash_lookup (link_info
.hash
, name
, false, false, true);
727 case bfd_link_hash_defined
:
728 case bfd_link_hash_defweak
:
729 from
= h
->u
.def
.section
->owner
;
732 case bfd_link_hash_undefined
:
733 case bfd_link_hash_undefweak
:
734 from
= h
->u
.undef
.abfd
;
737 case bfd_link_hash_common
:
738 from
= h
->u
.c
.p
->section
->owner
;
743 if (! header_printed
)
747 sprintf (buf
, "%-29s %s\n\n", _("Archive member included"),
748 _("because of file (symbol)"));
750 header_printed
= true;
753 if (bfd_my_archive (abfd
) == NULL
)
755 minfo ("%s", bfd_get_filename (abfd
));
756 len
= strlen (bfd_get_filename (abfd
));
760 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd
)),
761 bfd_get_filename (abfd
));
762 len
= (strlen (bfd_get_filename (bfd_my_archive (abfd
)))
763 + strlen (bfd_get_filename (abfd
))
781 minfo ("(%T)\n", h
->root
.string
);
783 minfo ("(%s)\n", name
);
786 if (trace_files
|| trace_file_tries
)
787 info_msg ("%I\n", input
);
792 /* This is called when BFD has discovered a symbol which is defined
797 multiple_definition (info
, name
, obfd
, osec
, oval
, nbfd
, nsec
, nval
)
798 struct bfd_link_info
*info
;
807 /* If either section has the output_section field set to
808 bfd_abs_section_ptr, it means that the section is being
809 discarded, and this is not really a multiple definition at all.
810 FIXME: It would be cleaner to somehow ignore symbols defined in
811 sections which are being discarded. */
812 if ((osec
->output_section
!= NULL
813 && ! bfd_is_abs_section (osec
)
814 && bfd_is_abs_section (osec
->output_section
))
815 || (nsec
->output_section
!= NULL
816 && ! bfd_is_abs_section (nsec
)
817 && bfd_is_abs_section (nsec
->output_section
)))
820 einfo (_("%X%C: multiple definition of `%T'\n"),
821 nbfd
, nsec
, nval
, name
);
822 if (obfd
!= (bfd
*) NULL
)
823 einfo (_("%D: first defined here\n"), obfd
, osec
, oval
);
827 /* This is called when there is a definition of a common symbol, or
828 when a common symbol is found for a symbol that is already defined,
829 or when two common symbols are found. We only do something if
830 -warn-common was used. */
834 multiple_common (info
, name
, obfd
, otype
, osize
, nbfd
, ntype
, nsize
)
835 struct bfd_link_info
*info
;
838 enum bfd_link_hash_type otype
;
841 enum bfd_link_hash_type ntype
;
844 if (! config
.warn_common
)
847 if (ntype
== bfd_link_hash_defined
848 || ntype
== bfd_link_hash_defweak
849 || ntype
== bfd_link_hash_indirect
)
851 ASSERT (otype
== bfd_link_hash_common
);
852 einfo (_("%B: warning: definition of `%T' overriding common\n"),
855 einfo (_("%B: warning: common is here\n"), obfd
);
857 else if (otype
== bfd_link_hash_defined
858 || otype
== bfd_link_hash_defweak
859 || otype
== bfd_link_hash_indirect
)
861 ASSERT (ntype
== bfd_link_hash_common
);
862 einfo (_("%B: warning: common of `%T' overridden by definition\n"),
865 einfo (_("%B: warning: defined here\n"), obfd
);
869 ASSERT (otype
== bfd_link_hash_common
&& ntype
== bfd_link_hash_common
);
872 einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
875 einfo (_("%B: warning: larger common is here\n"), obfd
);
877 else if (nsize
> osize
)
879 einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
882 einfo (_("%B: warning: smaller common is here\n"), obfd
);
886 einfo (_("%B: warning: multiple common of `%T'\n"), nbfd
, name
);
888 einfo (_("%B: warning: previous common is here\n"), obfd
);
895 /* This is called when BFD has discovered a set element. H is the
896 entry in the linker hash table for the set. SECTION and VALUE
897 represent a value which should be added to the set. */
901 add_to_set (info
, h
, reloc
, abfd
, section
, value
)
902 struct bfd_link_info
*info
;
903 struct bfd_link_hash_entry
*h
;
904 bfd_reloc_code_real_type reloc
;
909 if (config
.warn_constructors
)
910 einfo (_("%P: warning: global constructor %s used\n"),
913 if (! config
.build_constructors
)
916 ldctor_add_set_entry (h
, reloc
, (const char *) NULL
, section
, value
);
918 if (h
->type
== bfd_link_hash_new
)
920 h
->type
= bfd_link_hash_undefined
;
921 h
->u
.undef
.abfd
= abfd
;
922 /* We don't call bfd_link_add_undef to add this to the list of
923 undefined symbols because we are going to define it
930 /* This is called when BFD has discovered a constructor. This is only
931 called for some object file formats--those which do not handle
932 constructors in some more clever fashion. This is similar to
933 adding an element to a set, but less general. */
936 constructor_callback (info
, constructor
, name
, abfd
, section
, value
)
937 struct bfd_link_info
*info
;
945 struct bfd_link_hash_entry
*h
;
946 char set_name
[1 + sizeof "__CTOR_LIST__"];
948 if (config
.warn_constructors
)
949 einfo (_("%P: warning: global constructor %s used\n"), name
);
951 if (! config
.build_constructors
)
954 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
955 useful error message. */
956 if (bfd_reloc_type_lookup (output_bfd
, BFD_RELOC_CTOR
) == NULL
957 && (link_info
.relocateable
958 || bfd_reloc_type_lookup (abfd
, BFD_RELOC_CTOR
) == NULL
))
959 einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
962 if (bfd_get_symbol_leading_char (abfd
) != '\0')
963 *s
++ = bfd_get_symbol_leading_char (abfd
);
965 strcpy (s
, "__CTOR_LIST__");
967 strcpy (s
, "__DTOR_LIST__");
969 h
= bfd_link_hash_lookup (info
->hash
, set_name
, true, true, true);
970 if (h
== (struct bfd_link_hash_entry
*) NULL
)
971 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
972 if (h
->type
== bfd_link_hash_new
)
974 h
->type
= bfd_link_hash_undefined
;
975 h
->u
.undef
.abfd
= abfd
;
976 /* We don't call bfd_link_add_undef to add this to the list of
977 undefined symbols because we are going to define it
981 ldctor_add_set_entry (h
, BFD_RELOC_CTOR
, name
, section
, value
);
985 /* A structure used by warning_callback to pass information through
986 bfd_map_over_sections. */
988 struct warning_callback_info
996 /* This is called when there is a reference to a warning symbol. */
1000 warning_callback (info
, warning
, symbol
, abfd
, section
, address
)
1001 struct bfd_link_info
*info
;
1002 const char *warning
;
1008 /* This is a hack to support warn_multiple_gp. FIXME: This should
1009 have a cleaner interface, but what? */
1010 if (! config
.warn_multiple_gp
1011 && strcmp (warning
, "using multiple gp values") == 0)
1014 if (section
!= NULL
)
1015 einfo ("%C: %s\n", abfd
, section
, address
, warning
);
1016 else if (abfd
== NULL
)
1017 einfo ("%P: %s\n", warning
);
1018 else if (symbol
== NULL
)
1019 einfo ("%B: %s\n", abfd
, warning
);
1022 lang_input_statement_type
*entry
;
1024 struct warning_callback_info info
;
1026 /* Look through the relocs to see if we can find a plausible
1029 entry
= (lang_input_statement_type
*) abfd
->usrdata
;
1030 if (entry
!= NULL
&& entry
->asymbols
!= NULL
)
1031 asymbols
= entry
->asymbols
;
1037 symsize
= bfd_get_symtab_upper_bound (abfd
);
1039 einfo (_("%B%F: could not read symbols: %E\n"), abfd
);
1040 asymbols
= (asymbol
**) xmalloc (symsize
);
1041 symbol_count
= bfd_canonicalize_symtab (abfd
, asymbols
);
1042 if (symbol_count
< 0)
1043 einfo (_("%B%F: could not read symbols: %E\n"), abfd
);
1046 entry
->asymbols
= asymbols
;
1047 entry
->symbol_count
= symbol_count
;
1052 info
.warning
= warning
;
1053 info
.symbol
= symbol
;
1054 info
.asymbols
= asymbols
;
1055 bfd_map_over_sections (abfd
, warning_find_reloc
, (PTR
) &info
);
1058 einfo ("%B: %s\n", abfd
, warning
);
1067 /* This is called by warning_callback for each section. It checks the
1068 relocs of the section to see if it can find a reference to the
1069 symbol which triggered the warning. If it can, it uses the reloc
1070 to give an error message with a file and line number. */
1073 warning_find_reloc (abfd
, sec
, iarg
)
1078 struct warning_callback_info
*info
= (struct warning_callback_info
*) iarg
;
1082 arelent
**p
, **pend
;
1087 relsize
= bfd_get_reloc_upper_bound (abfd
, sec
);
1089 einfo (_("%B%F: could not read relocs: %E\n"), abfd
);
1093 relpp
= (arelent
**) xmalloc (relsize
);
1094 relcount
= bfd_canonicalize_reloc (abfd
, sec
, relpp
, info
->asymbols
);
1096 einfo (_("%B%F: could not read relocs: %E\n"), abfd
);
1099 pend
= p
+ relcount
;
1100 for (; p
< pend
&& *p
!= NULL
; p
++)
1104 if (q
->sym_ptr_ptr
!= NULL
1105 && *q
->sym_ptr_ptr
!= NULL
1106 && strcmp (bfd_asymbol_name (*q
->sym_ptr_ptr
), info
->symbol
) == 0)
1108 /* We found a reloc for the symbol we are looking for. */
1109 einfo ("%C: %s\n", abfd
, sec
, q
->address
, info
->warning
);
1118 /* This is called when an undefined symbol is found. */
1122 undefined_symbol (info
, name
, abfd
, section
, address
)
1123 struct bfd_link_info
*info
;
1129 static char *error_name
;
1130 static unsigned int error_count
;
1132 #define MAX_ERRORS_IN_A_ROW 5
1134 if (config
.warn_once
)
1136 static struct bfd_hash_table
*hash
;
1138 /* Only warn once about a particular undefined symbol. */
1142 hash
= ((struct bfd_hash_table
*)
1143 xmalloc (sizeof (struct bfd_hash_table
)));
1144 if (! bfd_hash_table_init (hash
, bfd_hash_newfunc
))
1145 einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
1148 if (bfd_hash_lookup (hash
, name
, false, false) != NULL
)
1151 if (bfd_hash_lookup (hash
, name
, true, true) == NULL
)
1152 einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
1155 /* We never print more than a reasonable number of errors in a row
1156 for a single symbol. */
1157 if (error_name
!= (char *) NULL
1158 && strcmp (name
, error_name
) == 0)
1163 if (error_name
!= (char *) NULL
)
1165 error_name
= buystring (name
);
1168 if (section
!= NULL
)
1170 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1171 einfo (_("%X%C: undefined reference to `%T'\n"),
1172 abfd
, section
, address
, name
);
1173 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1174 einfo (_("%D: more undefined references to `%T' follow\n"),
1175 abfd
, section
, address
, name
);
1179 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1180 einfo (_("%X%B: undefined reference to `%T'\n"),
1182 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1183 einfo (_("%B: more undefined references to `%T' follow\n"),
1190 /* This is called when a reloc overflows. */
1194 reloc_overflow (info
, name
, reloc_name
, addend
, abfd
, section
, address
)
1195 struct bfd_link_info
*info
;
1197 const char *reloc_name
;
1203 if (abfd
== (bfd
*) NULL
)
1204 einfo (_("%P%X: generated"));
1206 einfo ("%X%C:", abfd
, section
, address
);
1207 einfo (_(" relocation truncated to fit: %s %T"), reloc_name
, name
);
1209 einfo ("+%v", addend
);
1214 /* This is called when a dangerous relocation is made. */
1218 reloc_dangerous (info
, message
, abfd
, section
, address
)
1219 struct bfd_link_info
*info
;
1220 const char *message
;
1225 if (abfd
== (bfd
*) NULL
)
1226 einfo (_("%P%X: generated"));
1228 einfo ("%X%C:", abfd
, section
, address
);
1229 einfo (_("dangerous relocation: %s\n"), message
);
1233 /* This is called when a reloc is being generated attached to a symbol
1234 that is not being output. */
1238 unattached_reloc (info
, name
, abfd
, section
, address
)
1239 struct bfd_link_info
*info
;
1245 if (abfd
== (bfd
*) NULL
)
1246 einfo (_("%P%X: generated"));
1248 einfo ("%X%C:", abfd
, section
, address
);
1249 einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name
);
1253 /* This is called if link_info.notice_all is set, or when a symbol in
1254 link_info.notice_hash is found. Symbols are put in notice_hash
1255 using the -y option. */
1258 notice (info
, name
, abfd
, section
, value
)
1259 struct bfd_link_info
*info
;
1265 if (! info
->notice_all
1266 || (info
->notice_hash
!= NULL
1267 && bfd_hash_lookup (info
->notice_hash
, name
, false, false) != NULL
))
1269 if (bfd_is_und_section (section
))
1270 einfo ("%B: reference to %s\n", abfd
, name
);
1272 einfo ("%B: definition of %s\n", abfd
, name
);
1275 if (command_line
.cref
|| nocrossref_list
!= NULL
)
1276 add_cref (name
, abfd
, section
, value
);