1 /* Main program of GNU linker.
2 Copyright (C) 1991, 92, 93, 94, 95, 1996 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)
49 static char *get_emulation
PARAMS ((int, char **));
50 static void set_scripts_dir
PARAMS ((void));
55 const char *output_filename
= "a.out";
57 /* Name this program was invoked by. */
60 /* The file that we're creating */
63 /* Set by -G argument, for MIPS ECOFF target. */
64 int g_switch_value
= 8;
66 /* Nonzero means print names of input files as processed. */
69 /* Nonzero means same, but note open failures, too. */
70 boolean trace_file_tries
;
72 /* Nonzero means version number was printed, so exit successfully
73 instead of complaining if no input files are given. */
74 boolean version_printed
;
76 /* Nonzero means link in every member of an archive. */
77 boolean whole_archive
;
79 args_type command_line
;
81 ld_config_type config
;
83 static boolean check_for_scripts_dir
PARAMS ((char *dir
));
84 static boolean add_archive_element
PARAMS ((struct bfd_link_info
*, bfd
*,
86 static boolean multiple_definition
PARAMS ((struct bfd_link_info
*,
88 bfd
*, asection
*, bfd_vma
,
89 bfd
*, asection
*, bfd_vma
));
90 static boolean multiple_common
PARAMS ((struct bfd_link_info
*,
92 enum bfd_link_hash_type
, bfd_vma
,
93 bfd
*, enum bfd_link_hash_type
,
95 static boolean add_to_set
PARAMS ((struct bfd_link_info
*,
96 struct bfd_link_hash_entry
*,
97 bfd_reloc_code_real_type
,
98 bfd
*, asection
*, bfd_vma
));
99 static boolean constructor_callback
PARAMS ((struct bfd_link_info
*,
102 bfd
*, asection
*, bfd_vma
));
103 static boolean warning_callback
PARAMS ((struct bfd_link_info
*,
104 const char *, const char *, bfd
*,
105 asection
*, bfd_vma
));
106 static void warning_find_reloc
PARAMS ((bfd
*, asection
*, PTR
));
107 static boolean undefined_symbol
PARAMS ((struct bfd_link_info
*,
109 asection
*, bfd_vma
));
110 static boolean reloc_overflow
PARAMS ((struct bfd_link_info
*, const char *,
111 const char *, bfd_vma
,
112 bfd
*, asection
*, bfd_vma
));
113 static boolean reloc_dangerous
PARAMS ((struct bfd_link_info
*, const char *,
114 bfd
*, asection
*, bfd_vma
));
115 static boolean unattached_reloc
PARAMS ((struct bfd_link_info
*,
116 const char *, bfd
*, asection
*,
118 static boolean notice
PARAMS ((struct bfd_link_info
*, const char *,
119 bfd
*, asection
*, bfd_vma
));
121 static struct bfd_link_callbacks link_callbacks
=
127 constructor_callback
,
136 struct bfd_link_info link_info
;
143 if (output_bfd
&& output_bfd
->iostream
)
144 fclose((FILE *)(output_bfd
->iostream
));
145 if (delete_output_file_on_failure
)
146 unlink (output_filename
);
156 long start_time
= get_run_time ();
158 program_name
= argv
[0];
159 xmalloc_set_program_name (program_name
);
161 START_PROGRESS (program_name
, 0);
165 bfd_set_error_program_name (program_name
);
167 xatexit (remove_output
);
169 /* Initialize the data about options. */
170 trace_files
= trace_file_tries
= version_printed
= false;
171 whole_archive
= false;
172 config
.build_constructors
= true;
173 config
.dynamic_link
= false;
174 command_line
.force_common_definition
= false;
175 command_line
.interpreter
= NULL
;
176 command_line
.rpath
= NULL
;
178 link_info
.callbacks
= &link_callbacks
;
179 link_info
.relocateable
= false;
180 link_info
.shared
= false;
181 link_info
.symbolic
= false;
182 link_info
.static_link
= false;
183 link_info
.traditional_format
= false;
184 link_info
.strip
= strip_none
;
185 link_info
.discard
= discard_none
;
186 link_info
.lprefix_len
= 1;
187 link_info
.lprefix
= "L";
188 link_info
.keep_memory
= true;
189 link_info
.input_bfds
= NULL
;
190 link_info
.create_object_symbols_section
= NULL
;
191 link_info
.hash
= NULL
;
192 link_info
.keep_hash
= NULL
;
193 link_info
.notice_all
= false;
194 link_info
.notice_hash
= NULL
;
195 link_info
.wrap_hash
= NULL
;
197 ldfile_add_arch ("");
199 config
.make_executable
= true;
200 force_make_executable
= false;
201 config
.magic_demand_paged
= true;
202 config
.text_read_only
= true;
203 config
.make_executable
= true;
205 emulation
= get_emulation (argc
, argv
);
206 ldemul_choose_mode (emulation
);
207 default_target
= ldemul_choose_target ();
209 ldemul_before_parse ();
210 lang_has_input_file
= false;
211 parse_args (argc
, argv
);
213 ldemul_set_symbols ();
215 if (link_info
.relocateable
)
217 if (command_line
.relax
)
218 einfo ("%P%F: -relax and -r may not be used together\n");
219 if (link_info
.shared
)
220 einfo ("%P%F: -r and -shared may not be used together\n");
223 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
224 don't see how else this can be handled, since in this case we
225 must preserve all externally visible symbols. */
226 if (link_info
.relocateable
&& link_info
.strip
== strip_all
)
228 link_info
.strip
= strip_debugger
;
229 if (link_info
.discard
== discard_none
)
230 link_info
.discard
= discard_all
;
233 /* This essentially adds another -L directory so this must be done after
234 the -L's in argv have been processed. */
237 if (had_script
== false)
239 /* Read the emulation's appropriate default script. */
241 char *s
= ldemul_get_script (&isfile
);
244 ldfile_open_command_file (s
);
247 if (trace_file_tries
)
249 info_msg ("using internal linker script:\n");
250 info_msg ("==================================================\n");
252 info_msg ("\n==================================================\n");
257 parser_input
= input_script
;
264 if (lang_has_input_file
== false)
268 einfo ("%P%F: no input files\n");
273 info_msg ("%P: mode %s\n", emulation
);
276 ldemul_after_parse ();
279 if (config
.map_filename
)
281 if (strcmp (config
.map_filename
, "-") == 0)
283 config
.map_file
= stdout
;
287 config
.map_file
= fopen (config
.map_filename
, FOPEN_WT
);
288 if (config
.map_file
== (FILE *) NULL
)
290 bfd_set_error (bfd_error_system_call
);
291 einfo ("%P%F: cannot open map file %s: %E\n",
292 config
.map_filename
);
300 /* Print error messages for any missing symbols, for any warning
301 symbols, and possibly multiple definitions */
304 if (config
.text_read_only
)
306 /* Look for a text section and mark the readonly attribute in it */
307 asection
*found
= bfd_get_section_by_name (output_bfd
, ".text");
309 if (found
!= (asection
*) NULL
)
311 found
->flags
|= SEC_READONLY
;
315 if (link_info
.relocateable
)
316 output_bfd
->flags
&= ~EXEC_P
;
318 output_bfd
->flags
|= EXEC_P
;
322 if (config
.map_file
!= NULL
)
324 if (command_line
.cref
)
325 output_cref (config
.map_file
!= NULL
? config
.map_file
: stdout
);
326 if (nocrossref_list
!= NULL
)
327 check_nocrossrefs ();
329 /* Even if we're producing relocateable output, some non-fatal errors should
330 be reported in the exit status. (What non-fatal errors, if any, do we
331 want to ignore for relocateable output?) */
333 if (config
.make_executable
== false && force_make_executable
== false)
335 if (trace_files
== true)
337 einfo ("%P: link errors found, deleting executable `%s'\n",
341 /* The file will be removed by remove_output. */
347 if (! bfd_close (output_bfd
))
348 einfo ("%F%B: final close failed: %E\n", output_bfd
);
350 /* If the --force-exe-suffix is enabled, and we're making an
351 executable file and it doesn't end in .exe, copy it to one which does. */
353 if (! link_info
.relocateable
&& command_line
.force_exe_suffix
)
355 int len
= strlen (output_filename
);
357 || (strcasecmp (output_filename
+ len
- 4, ".exe") != 0
358 && strcasecmp (output_filename
+ len
- 4, ".dll") != 0))
362 const int bsize
= 4096;
363 char *buf
= xmalloc (bsize
);
365 char *dst_name
= xmalloc (len
+ 5);
366 strcpy (dst_name
, output_filename
);
367 strcat (dst_name
, ".exe");
368 src
= fopen (output_filename
, FOPEN_RB
);
369 dst
= fopen (dst_name
, FOPEN_WB
);
372 einfo ("%X%P: unable to open for source of copy `%s'\n", output_filename
);
374 einfo ("%X%P: unable to open for destination of copy `%s'\n", dst_name
);
375 while ((l
= fread (buf
, 1, bsize
, src
)) > 0)
377 int done
= fwrite (buf
, 1, l
, dst
);
380 einfo ("%P: Error writing file `%s'\n", dst_name
);
386 einfo ("%P: Error closing file `%s'\n", dst_name
);
394 END_PROGRESS (program_name
);
398 extern char **environ
;
400 char *lim
= (char *) sbrk (0);
402 long run_time
= get_run_time () - start_time
;
404 fprintf (stderr
, "%s: total time in link: %ld.%06ld\n",
405 program_name
, run_time
/ 1000000, run_time
% 1000000);
407 fprintf (stderr
, "%s: data size %ld\n", program_name
,
408 (long) (lim
- (char *) &environ
));
412 /* Prevent remove_output from doing anything, after a successful link. */
413 output_filename
= NULL
;
419 /* We need to find any explicitly given emulation in order to initialize the
420 state that's needed by the lex&yacc argument parser (parse_args). */
423 get_emulation (argc
, argv
)
430 emulation
= (char *) getenv (EMULATION_ENVIRON
);
431 if (emulation
== NULL
)
432 emulation
= DEFAULT_EMULATION
;
434 for (i
= 1; i
< argc
; i
++)
436 if (!strncmp (argv
[i
], "-m", 2))
438 if (argv
[i
][2] == '\0')
443 emulation
= argv
[i
+ 1];
448 einfo("%P%F: missing argument to -m\n");
451 else if (strcmp (argv
[i
], "-mips1") == 0
452 || strcmp (argv
[i
], "-mips2") == 0
453 || strcmp (argv
[i
], "-mips3") == 0)
455 /* FIXME: The arguments -mips1, -mips2 and -mips3 are
456 passed to the linker by some MIPS compilers. They
457 generally tell the linker to use a slightly different
458 library path. Perhaps someday these should be
459 implemented as emulations; until then, we just ignore
460 the arguments and hope that nobody ever creates
461 emulations named ips1, ips2 or ips3. */
463 else if (strcmp (argv
[i
], "-m486") == 0)
465 /* FIXME: The argument -m486 is passed to the linker on
466 some Linux systems. Hope that nobody creates an
467 emulation named 486. */
472 emulation
= &argv
[i
][2];
480 /* If directory DIR contains an "ldscripts" subdirectory,
481 add DIR to the library search path and return true,
482 else return false. */
485 check_for_scripts_dir (dir
)
493 dirlen
= strlen (dir
);
494 /* sizeof counts the terminating NUL. */
495 buf
= (char *) xmalloc (dirlen
+ sizeof("/ldscripts"));
496 sprintf (buf
, "%s/ldscripts", dir
);
498 res
= stat (buf
, &s
) == 0 && S_ISDIR (s
.st_mode
);
501 ldfile_add_library_path (dir
, false);
505 /* Set the default directory for finding script files.
506 Libraries will be searched for here too, but that's ok.
507 We look for the "ldscripts" directory in:
509 SCRIPTDIR (passed from Makefile)
510 the dir where this program is (for using it from the build tree)
511 the dir where this program is/../lib (for installing the tool suite elsewhere) */
519 if (check_for_scripts_dir (SCRIPTDIR
))
520 return; /* We've been installed normally. */
522 /* Look for "ldscripts" in the dir where our binary is. */
523 end
= strrchr (program_name
, '/');
527 /* Don't look for ldscripts in the current directory. There is
528 too much potential for confusion. */
532 dirlen
= end
- program_name
;
533 /* Make a copy of program_name in dir.
534 Leave room for later "/../lib". */
535 dir
= (char *) xmalloc (dirlen
+ 8);
536 strncpy (dir
, program_name
, dirlen
);
539 if (check_for_scripts_dir (dir
))
540 return; /* Don't free dir. */
542 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */
543 strcpy (dir
+ dirlen
, "/../lib");
544 if (check_for_scripts_dir (dir
))
547 free (dir
); /* Well, we tried. */
554 if (link_info
.notice_hash
== (struct bfd_hash_table
*) NULL
)
556 link_info
.notice_hash
= ((struct bfd_hash_table
*)
557 xmalloc (sizeof (struct bfd_hash_table
)));
558 if (! bfd_hash_table_init_n (link_info
.notice_hash
,
561 einfo ("%P%F: bfd_hash_table_init failed: %E\n");
564 if (bfd_hash_lookup (link_info
.notice_hash
, name
, true, true)
565 == (struct bfd_hash_entry
*) NULL
)
566 einfo ("%P%F: bfd_hash_lookup failed: %E\n");
569 /* Record a symbol to be wrapped, from the --wrap option. */
575 if (link_info
.wrap_hash
== NULL
)
577 link_info
.wrap_hash
= ((struct bfd_hash_table
*)
578 xmalloc (sizeof (struct bfd_hash_table
)));
579 if (! bfd_hash_table_init_n (link_info
.wrap_hash
,
582 einfo ("%P%F: bfd_hash_table_init failed: %E\n");
584 if (bfd_hash_lookup (link_info
.wrap_hash
, name
, true, true) == NULL
)
585 einfo ("%P%F: bfd_hash_lookup failed: %E\n");
588 /* Handle the -retain-symbols-file option. */
591 add_keepsyms_file (filename
)
592 const char *filename
;
599 if (link_info
.strip
== strip_some
)
600 einfo ("%X%P: error: duplicate retain-symbols-file\n");
602 file
= fopen (filename
, "r");
603 if (file
== (FILE *) NULL
)
605 bfd_set_error (bfd_error_system_call
);
606 einfo ("%X%P: %s: %E\n", filename
);
610 link_info
.keep_hash
= ((struct bfd_hash_table
*)
611 xmalloc (sizeof (struct bfd_hash_table
)));
612 if (! bfd_hash_table_init (link_info
.keep_hash
, bfd_hash_newfunc
))
613 einfo ("%P%F: bfd_hash_table_init failed: %E\n");
616 buf
= (char *) xmalloc (bufsize
);
628 while (! isspace (c
) && c
!= EOF
)
635 buf
= xrealloc (buf
, bufsize
);
642 if (bfd_hash_lookup (link_info
.keep_hash
, buf
, true, true)
643 == (struct bfd_hash_entry
*) NULL
)
644 einfo ("%P%F: bfd_hash_lookup for insertion failed: %E\n");
648 if (link_info
.strip
!= strip_none
)
649 einfo ("%P: `-retain-symbols-file' overrides `-s' and `-S'\n");
651 link_info
.strip
= strip_some
;
654 /* Callbacks from the BFD linker routines. */
656 /* This is called when BFD has decided to include an archive member in
661 add_archive_element (info
, abfd
, name
)
662 struct bfd_link_info
*info
;
666 lang_input_statement_type
*input
;
668 input
= ((lang_input_statement_type
*)
669 xmalloc (sizeof (lang_input_statement_type
)));
670 input
->filename
= abfd
->filename
;
671 input
->local_sym_name
= abfd
->filename
;
672 input
->the_bfd
= abfd
;
673 input
->asymbols
= NULL
;
675 input
->just_syms_flag
= false;
676 input
->loaded
= false;
677 input
->search_dirs_flag
= false;
679 /* FIXME: The following fields are not set: header.next,
680 header.type, closed, passive_position, symbol_count,
681 next_real_file, is_archive, target, real. This bit of code is
682 from the old decode_library_subfile function. I don't know
683 whether any of those fields matters. */
685 ldlang_add_file (input
);
687 if (config
.map_file
!= (FILE *) NULL
)
689 static boolean header_printed
;
690 struct bfd_link_hash_entry
*h
;
694 h
= bfd_link_hash_lookup (link_info
.hash
, name
, false, false, true);
706 case bfd_link_hash_defined
:
707 case bfd_link_hash_defweak
:
708 from
= h
->u
.def
.section
->owner
;
711 case bfd_link_hash_undefined
:
712 case bfd_link_hash_undefweak
:
713 from
= h
->u
.undef
.abfd
;
716 case bfd_link_hash_common
:
717 from
= h
->u
.c
.p
->section
->owner
;
722 if (! header_printed
)
726 sprintf (buf
, "%-29s %s\n\n", "Archive member included",
727 "because of file (symbol)");
729 header_printed
= true;
732 if (bfd_my_archive (abfd
) == NULL
)
734 minfo ("%s", bfd_get_filename (abfd
));
735 len
= strlen (bfd_get_filename (abfd
));
739 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd
)),
740 bfd_get_filename (abfd
));
741 len
= (strlen (bfd_get_filename (bfd_my_archive (abfd
)))
742 + strlen (bfd_get_filename (abfd
))
760 minfo ("(%T)\n", h
->root
.string
);
762 minfo ("(%s)\n", name
);
765 if (trace_files
|| trace_file_tries
)
766 info_msg ("%I\n", input
);
771 /* This is called when BFD has discovered a symbol which is defined
776 multiple_definition (info
, name
, obfd
, osec
, oval
, nbfd
, nsec
, nval
)
777 struct bfd_link_info
*info
;
786 /* If either section has the output_section field set to
787 bfd_abs_section_ptr, it means that the section is being
788 discarded, and this is not really a multiple definition at all.
789 FIXME: It would be cleaner to somehow ignore symbols defined in
790 sections which are being discarded. */
791 if ((osec
->output_section
!= NULL
792 && bfd_is_abs_section (osec
->output_section
))
793 || (nsec
->output_section
!= NULL
794 && bfd_is_abs_section (nsec
->output_section
)))
797 einfo ("%X%C: multiple definition of `%T'\n",
798 nbfd
, nsec
, nval
, name
);
799 if (obfd
!= (bfd
*) NULL
)
800 einfo ("%D: first defined here\n", obfd
, osec
, oval
);
804 /* This is called when there is a definition of a common symbol, or
805 when a common symbol is found for a symbol that is already defined,
806 or when two common symbols are found. We only do something if
807 -warn-common was used. */
811 multiple_common (info
, name
, obfd
, otype
, osize
, nbfd
, ntype
, nsize
)
812 struct bfd_link_info
*info
;
815 enum bfd_link_hash_type otype
;
818 enum bfd_link_hash_type ntype
;
821 if (! config
.warn_common
)
824 if (ntype
== bfd_link_hash_defined
825 || ntype
== bfd_link_hash_defweak
826 || ntype
== bfd_link_hash_indirect
)
828 ASSERT (otype
== bfd_link_hash_common
);
829 einfo ("%B: warning: definition of `%T' overriding common\n",
832 einfo ("%B: warning: common is here\n", obfd
);
834 else if (otype
== bfd_link_hash_defined
835 || otype
== bfd_link_hash_defweak
836 || otype
== bfd_link_hash_indirect
)
838 ASSERT (ntype
== bfd_link_hash_common
);
839 einfo ("%B: warning: common of `%T' overridden by definition\n",
842 einfo ("%B: warning: defined here\n", obfd
);
846 ASSERT (otype
== bfd_link_hash_common
&& ntype
== bfd_link_hash_common
);
849 einfo ("%B: warning: common of `%T' overridden by larger common\n",
852 einfo ("%B: warning: larger common is here\n", obfd
);
854 else if (nsize
> osize
)
856 einfo ("%B: warning: common of `%T' overriding smaller common\n",
859 einfo ("%B: warning: smaller common is here\n", obfd
);
863 einfo ("%B: warning: multiple common of `%T'\n", nbfd
, name
);
865 einfo ("%B: warning: previous common is here\n", obfd
);
872 /* This is called when BFD has discovered a set element. H is the
873 entry in the linker hash table for the set. SECTION and VALUE
874 represent a value which should be added to the set. */
878 add_to_set (info
, h
, reloc
, abfd
, section
, value
)
879 struct bfd_link_info
*info
;
880 struct bfd_link_hash_entry
*h
;
881 bfd_reloc_code_real_type reloc
;
886 if (config
.warn_constructors
)
887 einfo ("%P: warning: global constructor %s used\n",
890 if (! config
.build_constructors
)
893 ldctor_add_set_entry (h
, reloc
, (const char *) NULL
, section
, value
);
895 if (h
->type
== bfd_link_hash_new
)
897 h
->type
= bfd_link_hash_undefined
;
898 h
->u
.undef
.abfd
= abfd
;
899 /* We don't call bfd_link_add_undef to add this to the list of
900 undefined symbols because we are going to define it
907 /* This is called when BFD has discovered a constructor. This is only
908 called for some object file formats--those which do not handle
909 constructors in some more clever fashion. This is similar to
910 adding an element to a set, but less general. */
913 constructor_callback (info
, constructor
, name
, abfd
, section
, value
)
914 struct bfd_link_info
*info
;
922 struct bfd_link_hash_entry
*h
;
923 char set_name
[1 + sizeof "__CTOR_LIST__"];
925 if (config
.warn_constructors
)
926 einfo ("%P: warning: global constructor %s used\n", name
);
928 if (! config
.build_constructors
)
931 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
932 useful error message. */
933 if (bfd_reloc_type_lookup (output_bfd
, BFD_RELOC_CTOR
) == NULL
934 && (link_info
.relocateable
935 || bfd_reloc_type_lookup (abfd
, BFD_RELOC_CTOR
) == NULL
))
936 einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n");
939 if (bfd_get_symbol_leading_char (abfd
) != '\0')
940 *s
++ = bfd_get_symbol_leading_char (abfd
);
942 strcpy (s
, "__CTOR_LIST__");
944 strcpy (s
, "__DTOR_LIST__");
946 h
= bfd_link_hash_lookup (info
->hash
, set_name
, true, true, true);
947 if (h
== (struct bfd_link_hash_entry
*) NULL
)
948 einfo ("%P%F: bfd_link_hash_lookup failed: %E\n");
949 if (h
->type
== bfd_link_hash_new
)
951 h
->type
= bfd_link_hash_undefined
;
952 h
->u
.undef
.abfd
= abfd
;
953 /* We don't call bfd_link_add_undef to add this to the list of
954 undefined symbols because we are going to define it
958 ldctor_add_set_entry (h
, BFD_RELOC_CTOR
, name
, section
, value
);
962 /* A structure used by warning_callback to pass information through
963 bfd_map_over_sections. */
965 struct warning_callback_info
973 /* This is called when there is a reference to a warning symbol. */
977 warning_callback (info
, warning
, symbol
, abfd
, section
, address
)
978 struct bfd_link_info
*info
;
985 /* This is a hack to support warn_multiple_gp. FIXME: This should
986 have a cleaner interface, but what? */
987 if (! config
.warn_multiple_gp
988 && strcmp (warning
, "using multiple gp values") == 0)
992 einfo ("%C: %s\n", abfd
, section
, address
, warning
);
993 else if (abfd
== NULL
)
994 einfo ("%P: %s\n", warning
);
995 else if (symbol
== NULL
)
996 einfo ("%B: %s\n", abfd
, warning
);
999 lang_input_statement_type
*entry
;
1001 struct warning_callback_info info
;
1003 /* Look through the relocs to see if we can find a plausible
1006 entry
= (lang_input_statement_type
*) abfd
->usrdata
;
1007 if (entry
!= NULL
&& entry
->asymbols
!= NULL
)
1008 asymbols
= entry
->asymbols
;
1014 symsize
= bfd_get_symtab_upper_bound (abfd
);
1016 einfo ("%B%F: could not read symbols: %E\n", abfd
);
1017 asymbols
= (asymbol
**) xmalloc (symsize
);
1018 symbol_count
= bfd_canonicalize_symtab (abfd
, asymbols
);
1019 if (symbol_count
< 0)
1020 einfo ("%B%F: could not read symbols: %E\n", abfd
);
1023 entry
->asymbols
= asymbols
;
1024 entry
->symbol_count
= symbol_count
;
1029 info
.warning
= warning
;
1030 info
.symbol
= symbol
;
1031 info
.asymbols
= asymbols
;
1032 bfd_map_over_sections (abfd
, warning_find_reloc
, (PTR
) &info
);
1035 einfo ("%B: %s\n", abfd
, warning
);
1044 /* This is called by warning_callback for each section. It checks the
1045 relocs of the section to see if it can find a reference to the
1046 symbol which triggered the warning. If it can, it uses the reloc
1047 to give an error message with a file and line number. */
1050 warning_find_reloc (abfd
, sec
, iarg
)
1055 struct warning_callback_info
*info
= (struct warning_callback_info
*) iarg
;
1059 arelent
**p
, **pend
;
1064 relsize
= bfd_get_reloc_upper_bound (abfd
, sec
);
1066 einfo ("%B%F: could not read relocs: %E\n", abfd
);
1070 relpp
= (arelent
**) xmalloc (relsize
);
1071 relcount
= bfd_canonicalize_reloc (abfd
, sec
, relpp
, info
->asymbols
);
1073 einfo ("%B%F: could not read relocs: %E\n", abfd
);
1076 pend
= p
+ relcount
;
1077 for (; p
< pend
&& *p
!= NULL
; p
++)
1081 if (q
->sym_ptr_ptr
!= NULL
1082 && *q
->sym_ptr_ptr
!= NULL
1083 && strcmp (bfd_asymbol_name (*q
->sym_ptr_ptr
), info
->symbol
) == 0)
1085 /* We found a reloc for the symbol we are looking for. */
1086 einfo ("%C: %s\n", abfd
, sec
, q
->address
, info
->warning
);
1095 /* This is called when an undefined symbol is found. */
1099 undefined_symbol (info
, name
, abfd
, section
, address
)
1100 struct bfd_link_info
*info
;
1106 static char *error_name
;
1107 static unsigned int error_count
;
1109 #define MAX_ERRORS_IN_A_ROW 5
1111 if (config
.warn_once
)
1113 static struct bfd_hash_table
*hash
;
1115 /* Only warn once about a particular undefined symbol. */
1119 hash
= ((struct bfd_hash_table
*)
1120 xmalloc (sizeof (struct bfd_hash_table
)));
1121 if (! bfd_hash_table_init (hash
, bfd_hash_newfunc
))
1122 einfo ("%F%P: bfd_hash_table_init failed: %E\n");
1125 if (bfd_hash_lookup (hash
, name
, false, false) != NULL
)
1128 if (bfd_hash_lookup (hash
, name
, true, true) == NULL
)
1129 einfo ("%F%P: bfd_hash_lookup failed: %E\n");
1132 /* We never print more than a reasonable number of errors in a row
1133 for a single symbol. */
1134 if (error_name
!= (char *) NULL
1135 && strcmp (name
, error_name
) == 0)
1140 if (error_name
!= (char *) NULL
)
1142 error_name
= buystring (name
);
1145 if (section
!= NULL
)
1147 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1148 einfo ("%X%C: undefined reference to `%T'\n",
1149 abfd
, section
, address
, name
);
1150 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1151 einfo ("%D: more undefined references to `%T' follow\n",
1152 abfd
, section
, address
, name
);
1156 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1157 einfo ("%X%B: undefined reference to `%T'\n",
1159 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1160 einfo ("%B: more undefined references to `%T' follow\n",
1167 /* This is called when a reloc overflows. */
1171 reloc_overflow (info
, name
, reloc_name
, addend
, abfd
, section
, address
)
1172 struct bfd_link_info
*info
;
1174 const char *reloc_name
;
1180 if (abfd
== (bfd
*) NULL
)
1181 einfo ("%P%X: generated");
1183 einfo ("%X%C:", abfd
, section
, address
);
1184 einfo (" relocation truncated to fit: %s %T", reloc_name
, name
);
1186 einfo ("+%v", addend
);
1191 /* This is called when a dangerous relocation is made. */
1195 reloc_dangerous (info
, message
, abfd
, section
, address
)
1196 struct bfd_link_info
*info
;
1197 const char *message
;
1202 if (abfd
== (bfd
*) NULL
)
1203 einfo ("%P%X: generated");
1205 einfo ("%X%C:", abfd
, section
, address
);
1206 einfo ("dangerous relocation: %s\n", message
);
1210 /* This is called when a reloc is being generated attached to a symbol
1211 that is not being output. */
1215 unattached_reloc (info
, name
, abfd
, section
, address
)
1216 struct bfd_link_info
*info
;
1222 if (abfd
== (bfd
*) NULL
)
1223 einfo ("%P%X: generated");
1225 einfo ("%X%C:", abfd
, section
, address
);
1226 einfo (" reloc refers to symbol `%T' which is not being output\n", name
);
1230 /* This is called if link_info.notice_all is set, or when a symbol in
1231 link_info.notice_hash is found. Symbols are put in notice_hash
1232 using the -y option. */
1235 notice (info
, name
, abfd
, section
, value
)
1236 struct bfd_link_info
*info
;
1242 if (! info
->notice_all
1243 || (info
->notice_hash
!= NULL
1244 && bfd_hash_lookup (info
->notice_hash
, name
, false, false) != NULL
))
1245 einfo ("%B: %s %s\n", abfd
,
1246 bfd_is_und_section (section
) ? "reference to" : "definition of",
1249 if (command_line
.cref
|| nocrossref_list
!= NULL
)
1250 add_cref (name
, abfd
, section
, value
);