1 /* Main program of GNU linker.
2 Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000
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"
30 #include "filenames.h"
44 /* Somewhere above, sys/stat.h got included . . . . */
45 #if !defined(S_ISDIR) && defined(S_IFDIR)
46 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
52 #ifdef NEED_DECLARATION_SBRK
57 static char *get_emulation
PARAMS ((int, char **));
58 static void set_scripts_dir
PARAMS ((void));
63 const char *output_filename
= "a.out";
65 /* Name this program was invoked by. */
68 /* The file that we're creating */
71 /* Set by -G argument, for MIPS ECOFF target. */
72 int g_switch_value
= 8;
74 /* Nonzero means print names of input files as processed. */
77 /* Nonzero means same, but note open failures, too. */
78 boolean trace_file_tries
;
80 /* Nonzero means version number was printed, so exit successfully
81 instead of complaining if no input files are given. */
82 boolean version_printed
;
84 /* Nonzero means link in every member of an archive. */
85 boolean whole_archive
;
87 /* True if we should demangle symbol names. */
90 args_type command_line
;
92 ld_config_type config
;
94 static void remove_output
PARAMS ((void));
95 static boolean check_for_scripts_dir
PARAMS ((char *dir
));
96 static boolean add_archive_element
PARAMS ((struct bfd_link_info
*, bfd
*,
98 static boolean multiple_definition
PARAMS ((struct bfd_link_info
*,
100 bfd
*, asection
*, bfd_vma
,
101 bfd
*, asection
*, bfd_vma
));
102 static boolean multiple_common
PARAMS ((struct bfd_link_info
*,
104 enum bfd_link_hash_type
, bfd_vma
,
105 bfd
*, enum bfd_link_hash_type
,
107 static boolean add_to_set
PARAMS ((struct bfd_link_info
*,
108 struct bfd_link_hash_entry
*,
109 bfd_reloc_code_real_type
,
110 bfd
*, asection
*, bfd_vma
));
111 static boolean constructor_callback
PARAMS ((struct bfd_link_info
*,
114 bfd
*, asection
*, bfd_vma
));
115 static boolean warning_callback
PARAMS ((struct bfd_link_info
*,
116 const char *, const char *, bfd
*,
117 asection
*, bfd_vma
));
118 static void warning_find_reloc
PARAMS ((bfd
*, asection
*, PTR
));
119 static boolean undefined_symbol
PARAMS ((struct bfd_link_info
*,
121 asection
*, bfd_vma
, boolean
));
122 static boolean reloc_overflow
PARAMS ((struct bfd_link_info
*, const char *,
123 const char *, bfd_vma
,
124 bfd
*, asection
*, bfd_vma
));
125 static boolean reloc_dangerous
PARAMS ((struct bfd_link_info
*, const char *,
126 bfd
*, asection
*, bfd_vma
));
127 static boolean unattached_reloc
PARAMS ((struct bfd_link_info
*,
128 const char *, bfd
*, asection
*,
130 static boolean notice
PARAMS ((struct bfd_link_info
*, const char *,
131 bfd
*, asection
*, bfd_vma
));
133 static struct bfd_link_callbacks link_callbacks
=
139 constructor_callback
,
148 struct bfd_link_info link_info
;
155 if (output_bfd
&& output_bfd
->iostream
)
156 fclose((FILE *)(output_bfd
->iostream
));
157 if (delete_output_file_on_failure
)
158 unlink (output_filename
);
168 long start_time
= get_run_time ();
170 #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
171 setlocale (LC_MESSAGES
, "");
173 bindtextdomain (PACKAGE
, LOCALEDIR
);
174 textdomain (PACKAGE
);
176 program_name
= argv
[0];
177 xmalloc_set_program_name (program_name
);
179 START_PROGRESS (program_name
, 0);
183 bfd_set_error_program_name (program_name
);
185 xatexit (remove_output
);
187 /* Set the default BFD target based on the configured target. Doing
188 this permits the linker to be configured for a particular target,
189 and linked against a shared BFD library which was configured for
190 a different target. The macro TARGET is defined by Makefile. */
191 if (! bfd_set_default_target (TARGET
))
193 einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET
);
197 /* Initialize the data about options. */
198 trace_files
= trace_file_tries
= version_printed
= false;
199 whole_archive
= false;
200 config
.build_constructors
= true;
201 config
.dynamic_link
= false;
202 config
.has_shared
= false;
203 command_line
.force_common_definition
= false;
204 command_line
.interpreter
= NULL
;
205 command_line
.rpath
= NULL
;
206 command_line
.warn_mismatch
= true;
207 command_line
.check_section_addresses
= true;
209 /* We initialize DEMANGLING based on the environment variable
210 COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
211 output of the linker, unless COLLECT_NO_DEMANGLE is set in the
212 environment. Acting the same way here lets us provide the same
213 interface by default. */
214 demangling
= getenv ("COLLECT_NO_DEMANGLE") == NULL
;
216 link_info
.callbacks
= &link_callbacks
;
217 link_info
.relocateable
= false;
218 link_info
.emitrelocations
= false;
219 link_info
.shared
= false;
220 link_info
.symbolic
= false;
221 link_info
.static_link
= false;
222 link_info
.traditional_format
= false;
223 link_info
.optimize
= false;
224 link_info
.no_undefined
= false;
225 link_info
.strip
= strip_none
;
226 link_info
.discard
= discard_none
;
227 link_info
.keep_memory
= true;
228 link_info
.input_bfds
= NULL
;
229 link_info
.create_object_symbols_section
= NULL
;
230 link_info
.hash
= NULL
;
231 link_info
.keep_hash
= NULL
;
232 link_info
.notice_all
= false;
233 link_info
.notice_hash
= NULL
;
234 link_info
.wrap_hash
= NULL
;
235 link_info
.mpc860c0
= 0;
236 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init
237 and _fini symbols. We are compatible. */
238 link_info
.init_function
= "_init";
239 link_info
.fini_function
= "_fini";
240 link_info
.flags
= (bfd_vma
) 0;
241 link_info
.flags_1
= (bfd_vma
) 0;
243 ldfile_add_arch ("");
245 config
.make_executable
= true;
246 force_make_executable
= false;
247 config
.magic_demand_paged
= true;
248 config
.text_read_only
= true;
249 config
.make_executable
= true;
251 emulation
= get_emulation (argc
, argv
);
252 ldemul_choose_mode (emulation
);
253 default_target
= ldemul_choose_target ();
255 ldemul_before_parse ();
256 lang_has_input_file
= false;
257 parse_args (argc
, argv
);
259 ldemul_set_symbols ();
261 if (link_info
.relocateable
)
263 if (command_line
.gc_sections
)
264 einfo ("%P%F: --gc-sections and -r may not be used together\n");
265 if (link_info
.mpc860c0
)
266 einfo (_("%P%F: -r and --mpc860c0 may not be used together\n"));
267 else if (command_line
.relax
)
268 einfo (_("%P%F: --relax and -r may not be used together\n"));
269 if (link_info
.shared
)
270 einfo (_("%P%F: -r and -shared may not be used together\n"));
273 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
274 don't see how else this can be handled, since in this case we
275 must preserve all externally visible symbols. */
276 if (link_info
.relocateable
&& link_info
.strip
== strip_all
)
278 link_info
.strip
= strip_debugger
;
279 if (link_info
.discard
== discard_none
)
280 link_info
.discard
= discard_all
;
283 /* This essentially adds another -L directory so this must be done after
284 the -L's in argv have been processed. */
287 if (had_script
== false)
289 /* Read the emulation's appropriate default script. */
291 char *s
= ldemul_get_script (&isfile
);
294 ldfile_open_command_file (s
);
297 if (trace_file_tries
)
299 info_msg (_("using internal linker script:\n"));
300 info_msg ("==================================================\n");
302 info_msg ("\n==================================================\n");
307 parser_input
= input_script
;
314 if (lang_has_input_file
== false)
318 einfo (_("%P%F: no input files\n"));
323 info_msg (_("%P: mode %s\n"), emulation
);
326 ldemul_after_parse ();
329 if (config
.map_filename
)
331 if (strcmp (config
.map_filename
, "-") == 0)
333 config
.map_file
= stdout
;
337 config
.map_file
= fopen (config
.map_filename
, FOPEN_WT
);
338 if (config
.map_file
== (FILE *) NULL
)
340 bfd_set_error (bfd_error_system_call
);
341 einfo (_("%P%F: cannot open map file %s: %E\n"),
342 config
.map_filename
);
350 /* Print error messages for any missing symbols, for any warning
351 symbols, and possibly multiple definitions */
353 if (! link_info
.relocateable
)
355 /* Look for a text section and switch the readonly attribute in it. */
356 asection
* found
= bfd_get_section_by_name (output_bfd
, ".text");
358 if (found
!= (asection
*) NULL
)
360 if (config
.text_read_only
)
361 found
->flags
|= SEC_READONLY
;
363 found
->flags
&= ~SEC_READONLY
;
367 if (link_info
.relocateable
)
368 output_bfd
->flags
&= ~EXEC_P
;
370 output_bfd
->flags
|= EXEC_P
;
374 if (config
.map_file
!= NULL
)
376 if (command_line
.cref
)
377 output_cref (config
.map_file
!= NULL
? config
.map_file
: stdout
);
378 if (nocrossref_list
!= NULL
)
379 check_nocrossrefs ();
381 /* Even if we're producing relocateable output, some non-fatal errors should
382 be reported in the exit status. (What non-fatal errors, if any, do we
383 want to ignore for relocateable output?) */
385 if (config
.make_executable
== false && force_make_executable
== false)
387 if (trace_files
== true)
389 einfo (_("%P: link errors found, deleting executable `%s'\n"),
393 /* The file will be removed by remove_output. */
399 if (! bfd_close (output_bfd
))
400 einfo (_("%F%B: final close failed: %E\n"), output_bfd
);
402 /* If the --force-exe-suffix is enabled, and we're making an
403 executable file and it doesn't end in .exe, copy it to one which does. */
405 if (! link_info
.relocateable
&& command_line
.force_exe_suffix
)
407 int len
= strlen (output_filename
);
409 || (strcasecmp (output_filename
+ len
- 4, ".exe") != 0
410 && strcasecmp (output_filename
+ len
- 4, ".dll") != 0))
414 const int bsize
= 4096;
415 char *buf
= xmalloc (bsize
);
417 char *dst_name
= xmalloc (len
+ 5);
418 strcpy (dst_name
, output_filename
);
419 strcat (dst_name
, ".exe");
420 src
= fopen (output_filename
, FOPEN_RB
);
421 dst
= fopen (dst_name
, FOPEN_WB
);
424 einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename
);
426 einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name
);
427 while ((l
= fread (buf
, 1, bsize
, src
)) > 0)
429 int done
= fwrite (buf
, 1, l
, dst
);
432 einfo (_("%P: Error writing file `%s'\n"), dst_name
);
436 if (fclose (dst
) == EOF
)
438 einfo (_("%P: Error closing file `%s'\n"), dst_name
);
446 END_PROGRESS (program_name
);
451 char *lim
= (char *) sbrk (0);
453 long run_time
= get_run_time () - start_time
;
455 fprintf (stderr
, _("%s: total time in link: %ld.%06ld\n"),
456 program_name
, run_time
/ 1000000, run_time
% 1000000);
458 fprintf (stderr
, _("%s: data size %ld\n"), program_name
,
459 (long) (lim
- (char *) &environ
));
463 /* Prevent remove_output from doing anything, after a successful link. */
464 output_filename
= NULL
;
470 /* We need to find any explicitly given emulation in order to initialize the
471 state that's needed by the lex&yacc argument parser (parse_args). */
474 get_emulation (argc
, argv
)
481 emulation
= getenv (EMULATION_ENVIRON
);
482 if (emulation
== NULL
)
483 emulation
= DEFAULT_EMULATION
;
485 for (i
= 1; i
< argc
; i
++)
487 if (!strncmp (argv
[i
], "-m", 2))
489 if (argv
[i
][2] == '\0')
494 emulation
= argv
[i
+ 1];
499 einfo(_("%P%F: missing argument to -m\n"));
502 else if (strcmp (argv
[i
], "-mips1") == 0
503 || strcmp (argv
[i
], "-mips2") == 0
504 || strcmp (argv
[i
], "-mips3") == 0
505 || strcmp (argv
[i
], "-mips4") == 0)
507 /* FIXME: The arguments -mips1, -mips2 and -mips3 are
508 passed to the linker by some MIPS compilers. They
509 generally tell the linker to use a slightly different
510 library path. Perhaps someday these should be
511 implemented as emulations; until then, we just ignore
512 the arguments and hope that nobody ever creates
513 emulations named ips1, ips2 or ips3. */
515 else if (strcmp (argv
[i
], "-m486") == 0)
517 /* FIXME: The argument -m486 is passed to the linker on
518 some Linux systems. Hope that nobody creates an
519 emulation named 486. */
524 emulation
= &argv
[i
][2];
532 /* If directory DIR contains an "ldscripts" subdirectory,
533 add DIR to the library search path and return true,
534 else return false. */
537 check_for_scripts_dir (dir
)
545 dirlen
= strlen (dir
);
546 /* sizeof counts the terminating NUL. */
547 buf
= (char *) xmalloc (dirlen
+ sizeof("/ldscripts"));
548 sprintf (buf
, "%s/ldscripts", dir
);
550 res
= stat (buf
, &s
) == 0 && S_ISDIR (s
.st_mode
);
553 ldfile_add_library_path (dir
, false);
557 /* Set the default directory for finding script files.
558 Libraries will be searched for here too, but that's ok.
559 We look for the "ldscripts" directory in:
561 SCRIPTDIR (passed from Makefile)
562 the dir where this program is (for using it from the build tree)
563 the dir where this program is/../lib (for installing the tool suite elsewhere) */
571 if (check_for_scripts_dir (SCRIPTDIR
))
572 return; /* We've been installed normally. */
574 /* Look for "ldscripts" in the dir where our binary is. */
575 end
= strrchr (program_name
, '/');
576 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
578 /* We could have \foo\bar, or /foo\bar. */
579 char *bslash
= strrchr (program_name
, '\\');
580 if (end
== NULL
|| (bslash
!= NULL
&& bslash
> end
))
587 /* Don't look for ldscripts in the current directory. There is
588 too much potential for confusion. */
592 dirlen
= end
- program_name
;
593 /* Make a copy of program_name in dir.
594 Leave room for later "/../lib". */
595 dir
= (char *) xmalloc (dirlen
+ 8);
596 strncpy (dir
, program_name
, dirlen
);
599 if (check_for_scripts_dir (dir
))
600 return; /* Don't free dir. */
602 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */
603 strcpy (dir
+ dirlen
, "/../lib");
604 if (check_for_scripts_dir (dir
))
607 free (dir
); /* Well, we tried. */
614 if (link_info
.notice_hash
== (struct bfd_hash_table
*) NULL
)
616 link_info
.notice_hash
= ((struct bfd_hash_table
*)
617 xmalloc (sizeof (struct bfd_hash_table
)));
618 if (! bfd_hash_table_init_n (link_info
.notice_hash
,
621 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
624 if (bfd_hash_lookup (link_info
.notice_hash
, name
, true, true)
625 == (struct bfd_hash_entry
*) NULL
)
626 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
629 /* Record a symbol to be wrapped, from the --wrap option. */
635 if (link_info
.wrap_hash
== NULL
)
637 link_info
.wrap_hash
= ((struct bfd_hash_table
*)
638 xmalloc (sizeof (struct bfd_hash_table
)));
639 if (! bfd_hash_table_init_n (link_info
.wrap_hash
,
642 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
644 if (bfd_hash_lookup (link_info
.wrap_hash
, name
, true, true) == NULL
)
645 einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
648 /* Handle the -retain-symbols-file option. */
651 add_keepsyms_file (filename
)
652 const char *filename
;
659 if (link_info
.strip
== strip_some
)
660 einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
662 file
= fopen (filename
, "r");
663 if (file
== (FILE *) NULL
)
665 bfd_set_error (bfd_error_system_call
);
666 einfo ("%X%P: %s: %E\n", filename
);
670 link_info
.keep_hash
= ((struct bfd_hash_table
*)
671 xmalloc (sizeof (struct bfd_hash_table
)));
672 if (! bfd_hash_table_init (link_info
.keep_hash
, bfd_hash_newfunc
))
673 einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
676 buf
= (char *) xmalloc (bufsize
);
688 while (! isspace (c
) && c
!= EOF
)
695 buf
= xrealloc (buf
, bufsize
);
702 if (bfd_hash_lookup (link_info
.keep_hash
, buf
, true, true)
703 == (struct bfd_hash_entry
*) NULL
)
704 einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
708 if (link_info
.strip
!= strip_none
)
709 einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
711 link_info
.strip
= strip_some
;
714 /* Callbacks from the BFD linker routines. */
716 /* This is called when BFD has decided to include an archive member in
721 add_archive_element (info
, abfd
, name
)
722 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
726 lang_input_statement_type
*input
;
728 input
= ((lang_input_statement_type
*)
729 xmalloc (sizeof (lang_input_statement_type
)));
730 input
->filename
= abfd
->filename
;
731 input
->local_sym_name
= abfd
->filename
;
732 input
->the_bfd
= abfd
;
733 input
->asymbols
= NULL
;
735 input
->just_syms_flag
= false;
736 input
->loaded
= false;
737 input
->search_dirs_flag
= false;
739 /* FIXME: The following fields are not set: header.next,
740 header.type, closed, passive_position, symbol_count,
741 next_real_file, is_archive, target, real. This bit of code is
742 from the old decode_library_subfile function. I don't know
743 whether any of those fields matters. */
745 ldlang_add_file (input
);
747 if (config
.map_file
!= (FILE *) NULL
)
749 static boolean header_printed
;
750 struct bfd_link_hash_entry
*h
;
754 h
= bfd_link_hash_lookup (link_info
.hash
, name
, false, false, true);
766 case bfd_link_hash_defined
:
767 case bfd_link_hash_defweak
:
768 from
= h
->u
.def
.section
->owner
;
771 case bfd_link_hash_undefined
:
772 case bfd_link_hash_undefweak
:
773 from
= h
->u
.undef
.abfd
;
776 case bfd_link_hash_common
:
777 from
= h
->u
.c
.p
->section
->owner
;
782 if (! header_printed
)
786 sprintf (buf
, "%-29s %s\n\n", _("Archive member included"),
787 _("because of file (symbol)"));
789 header_printed
= true;
792 if (bfd_my_archive (abfd
) == NULL
)
794 minfo ("%s", bfd_get_filename (abfd
));
795 len
= strlen (bfd_get_filename (abfd
));
799 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd
)),
800 bfd_get_filename (abfd
));
801 len
= (strlen (bfd_get_filename (bfd_my_archive (abfd
)))
802 + strlen (bfd_get_filename (abfd
))
820 minfo ("(%T)\n", h
->root
.string
);
822 minfo ("(%s)\n", name
);
825 if (trace_files
|| trace_file_tries
)
826 info_msg ("%I\n", input
);
831 /* This is called when BFD has discovered a symbol which is defined
836 multiple_definition (info
, name
, obfd
, osec
, oval
, nbfd
, nsec
, nval
)
837 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
846 /* If either section has the output_section field set to
847 bfd_abs_section_ptr, it means that the section is being
848 discarded, and this is not really a multiple definition at all.
849 FIXME: It would be cleaner to somehow ignore symbols defined in
850 sections which are being discarded. */
851 if ((osec
->output_section
!= NULL
852 && ! bfd_is_abs_section (osec
)
853 && bfd_is_abs_section (osec
->output_section
))
854 || (nsec
->output_section
!= NULL
855 && ! bfd_is_abs_section (nsec
)
856 && bfd_is_abs_section (nsec
->output_section
)))
859 einfo (_("%X%C: multiple definition of `%T'\n"),
860 nbfd
, nsec
, nval
, name
);
861 if (obfd
!= (bfd
*) NULL
)
862 einfo (_("%D: first defined here\n"), obfd
, osec
, oval
);
866 /* This is called when there is a definition of a common symbol, or
867 when a common symbol is found for a symbol that is already defined,
868 or when two common symbols are found. We only do something if
869 -warn-common was used. */
873 multiple_common (info
, name
, obfd
, otype
, osize
, nbfd
, ntype
, nsize
)
874 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
877 enum bfd_link_hash_type otype
;
880 enum bfd_link_hash_type ntype
;
883 if (! config
.warn_common
)
886 if (ntype
== bfd_link_hash_defined
887 || ntype
== bfd_link_hash_defweak
888 || ntype
== bfd_link_hash_indirect
)
890 ASSERT (otype
== bfd_link_hash_common
);
891 einfo (_("%B: warning: definition of `%T' overriding common\n"),
894 einfo (_("%B: warning: common is here\n"), obfd
);
896 else if (otype
== bfd_link_hash_defined
897 || otype
== bfd_link_hash_defweak
898 || otype
== bfd_link_hash_indirect
)
900 ASSERT (ntype
== bfd_link_hash_common
);
901 einfo (_("%B: warning: common of `%T' overridden by definition\n"),
904 einfo (_("%B: warning: defined here\n"), obfd
);
908 ASSERT (otype
== bfd_link_hash_common
&& ntype
== bfd_link_hash_common
);
911 einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
914 einfo (_("%B: warning: larger common is here\n"), obfd
);
916 else if (nsize
> osize
)
918 einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
921 einfo (_("%B: warning: smaller common is here\n"), obfd
);
925 einfo (_("%B: warning: multiple common of `%T'\n"), nbfd
, name
);
927 einfo (_("%B: warning: previous common is here\n"), obfd
);
934 /* This is called when BFD has discovered a set element. H is the
935 entry in the linker hash table for the set. SECTION and VALUE
936 represent a value which should be added to the set. */
940 add_to_set (info
, h
, reloc
, abfd
, section
, value
)
941 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
942 struct bfd_link_hash_entry
*h
;
943 bfd_reloc_code_real_type reloc
;
948 if (config
.warn_constructors
)
949 einfo (_("%P: warning: global constructor %s used\n"),
952 if (! config
.build_constructors
)
955 ldctor_add_set_entry (h
, reloc
, (const char *) NULL
, section
, value
);
957 if (h
->type
== bfd_link_hash_new
)
959 h
->type
= bfd_link_hash_undefined
;
960 h
->u
.undef
.abfd
= abfd
;
961 /* We don't call bfd_link_add_undef to add this to the list of
962 undefined symbols because we are going to define it
969 /* This is called when BFD has discovered a constructor. This is only
970 called for some object file formats--those which do not handle
971 constructors in some more clever fashion. This is similar to
972 adding an element to a set, but less general. */
975 constructor_callback (info
, constructor
, name
, abfd
, section
, value
)
976 struct bfd_link_info
*info
;
984 struct bfd_link_hash_entry
*h
;
985 char set_name
[1 + sizeof "__CTOR_LIST__"];
987 if (config
.warn_constructors
)
988 einfo (_("%P: warning: global constructor %s used\n"), name
);
990 if (! config
.build_constructors
)
993 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
994 useful error message. */
995 if (bfd_reloc_type_lookup (output_bfd
, BFD_RELOC_CTOR
) == NULL
996 && (link_info
.relocateable
997 || bfd_reloc_type_lookup (abfd
, BFD_RELOC_CTOR
) == NULL
))
998 einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
1001 if (bfd_get_symbol_leading_char (abfd
) != '\0')
1002 *s
++ = bfd_get_symbol_leading_char (abfd
);
1004 strcpy (s
, "__CTOR_LIST__");
1006 strcpy (s
, "__DTOR_LIST__");
1008 h
= bfd_link_hash_lookup (info
->hash
, set_name
, true, true, true);
1009 if (h
== (struct bfd_link_hash_entry
*) NULL
)
1010 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
1011 if (h
->type
== bfd_link_hash_new
)
1013 h
->type
= bfd_link_hash_undefined
;
1014 h
->u
.undef
.abfd
= abfd
;
1015 /* We don't call bfd_link_add_undef to add this to the list of
1016 undefined symbols because we are going to define it
1020 ldctor_add_set_entry (h
, BFD_RELOC_CTOR
, name
, section
, value
);
1024 /* A structure used by warning_callback to pass information through
1025 bfd_map_over_sections. */
1027 struct warning_callback_info
1030 const char *warning
;
1035 /* This is called when there is a reference to a warning symbol. */
1039 warning_callback (info
, warning
, symbol
, abfd
, section
, address
)
1040 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1041 const char *warning
;
1047 /* This is a hack to support warn_multiple_gp. FIXME: This should
1048 have a cleaner interface, but what? */
1049 if (! config
.warn_multiple_gp
1050 && strcmp (warning
, "using multiple gp values") == 0)
1053 if (section
!= NULL
)
1054 einfo ("%C: %s\n", abfd
, section
, address
, warning
);
1055 else if (abfd
== NULL
)
1056 einfo ("%P: %s\n", warning
);
1057 else if (symbol
== NULL
)
1058 einfo ("%B: %s\n", abfd
, warning
);
1061 lang_input_statement_type
*entry
;
1063 struct warning_callback_info info
;
1065 /* Look through the relocs to see if we can find a plausible
1068 entry
= (lang_input_statement_type
*) abfd
->usrdata
;
1069 if (entry
!= NULL
&& entry
->asymbols
!= NULL
)
1070 asymbols
= entry
->asymbols
;
1076 symsize
= bfd_get_symtab_upper_bound (abfd
);
1078 einfo (_("%B%F: could not read symbols: %E\n"), abfd
);
1079 asymbols
= (asymbol
**) xmalloc (symsize
);
1080 symbol_count
= bfd_canonicalize_symtab (abfd
, asymbols
);
1081 if (symbol_count
< 0)
1082 einfo (_("%B%F: could not read symbols: %E\n"), abfd
);
1085 entry
->asymbols
= asymbols
;
1086 entry
->symbol_count
= symbol_count
;
1091 info
.warning
= warning
;
1092 info
.symbol
= symbol
;
1093 info
.asymbols
= asymbols
;
1094 bfd_map_over_sections (abfd
, warning_find_reloc
, (PTR
) &info
);
1097 einfo ("%B: %s\n", abfd
, warning
);
1106 /* This is called by warning_callback for each section. It checks the
1107 relocs of the section to see if it can find a reference to the
1108 symbol which triggered the warning. If it can, it uses the reloc
1109 to give an error message with a file and line number. */
1112 warning_find_reloc (abfd
, sec
, iarg
)
1117 struct warning_callback_info
*info
= (struct warning_callback_info
*) iarg
;
1121 arelent
**p
, **pend
;
1126 relsize
= bfd_get_reloc_upper_bound (abfd
, sec
);
1128 einfo (_("%B%F: could not read relocs: %E\n"), abfd
);
1132 relpp
= (arelent
**) xmalloc (relsize
);
1133 relcount
= bfd_canonicalize_reloc (abfd
, sec
, relpp
, info
->asymbols
);
1135 einfo (_("%B%F: could not read relocs: %E\n"), abfd
);
1138 pend
= p
+ relcount
;
1139 for (; p
< pend
&& *p
!= NULL
; p
++)
1143 if (q
->sym_ptr_ptr
!= NULL
1144 && *q
->sym_ptr_ptr
!= NULL
1145 && strcmp (bfd_asymbol_name (*q
->sym_ptr_ptr
), info
->symbol
) == 0)
1147 /* We found a reloc for the symbol we are looking for. */
1148 einfo ("%C: %s\n", abfd
, sec
, q
->address
, info
->warning
);
1157 /* This is called when an undefined symbol is found. */
1161 undefined_symbol (info
, name
, abfd
, section
, address
, fatal
)
1162 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1167 boolean fatal ATTRIBUTE_UNUSED
;
1169 static char *error_name
;
1170 static unsigned int error_count
;
1172 #define MAX_ERRORS_IN_A_ROW 5
1174 if (config
.warn_once
)
1176 static struct bfd_hash_table
*hash
;
1178 /* Only warn once about a particular undefined symbol. */
1182 hash
= ((struct bfd_hash_table
*)
1183 xmalloc (sizeof (struct bfd_hash_table
)));
1184 if (! bfd_hash_table_init (hash
, bfd_hash_newfunc
))
1185 einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
1188 if (bfd_hash_lookup (hash
, name
, false, false) != NULL
)
1191 if (bfd_hash_lookup (hash
, name
, true, true) == NULL
)
1192 einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
1195 /* We never print more than a reasonable number of errors in a row
1196 for a single symbol. */
1197 if (error_name
!= (char *) NULL
1198 && strcmp (name
, error_name
) == 0)
1203 if (error_name
!= (char *) NULL
)
1205 error_name
= buystring (name
);
1208 if (section
!= NULL
)
1210 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1212 einfo (_("%C: undefined reference to `%T'\n"),
1213 abfd
, section
, address
, name
);
1217 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1218 einfo (_("%D: more undefined references to `%T' follow\n"),
1219 abfd
, section
, address
, name
);
1223 if (error_count
< MAX_ERRORS_IN_A_ROW
)
1225 einfo (_("%B: undefined reference to `%T'\n"),
1230 else if (error_count
== MAX_ERRORS_IN_A_ROW
)
1231 einfo (_("%B: more undefined references to `%T' follow\n"),
1238 /* This is called when a reloc overflows. */
1242 reloc_overflow (info
, name
, reloc_name
, addend
, abfd
, section
, address
)
1243 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1245 const char *reloc_name
;
1251 if (abfd
== (bfd
*) NULL
)
1252 einfo (_("%P%X: generated"));
1254 einfo ("%X%C:", abfd
, section
, address
);
1255 einfo (_(" relocation truncated to fit: %s %T"), reloc_name
, name
);
1257 einfo ("+%v", addend
);
1262 /* This is called when a dangerous relocation is made. */
1266 reloc_dangerous (info
, message
, abfd
, section
, address
)
1267 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1268 const char *message
;
1273 if (abfd
== (bfd
*) NULL
)
1274 einfo (_("%P%X: generated"));
1276 einfo ("%X%C:", abfd
, section
, address
);
1277 einfo (_("dangerous relocation: %s\n"), message
);
1281 /* This is called when a reloc is being generated attached to a symbol
1282 that is not being output. */
1286 unattached_reloc (info
, name
, abfd
, section
, address
)
1287 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1293 if (abfd
== (bfd
*) NULL
)
1294 einfo (_("%P%X: generated"));
1296 einfo ("%X%C:", abfd
, section
, address
);
1297 einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name
);
1301 /* This is called if link_info.notice_all is set, or when a symbol in
1302 link_info.notice_hash is found. Symbols are put in notice_hash
1303 using the -y option. */
1306 notice (info
, name
, abfd
, section
, value
)
1307 struct bfd_link_info
*info
;
1313 if (! info
->notice_all
1314 || (info
->notice_hash
!= NULL
1315 && bfd_hash_lookup (info
->notice_hash
, name
, false, false) != NULL
))
1317 if (bfd_is_und_section (section
))
1318 einfo ("%B: reference to %s\n", abfd
, name
);
1320 einfo ("%B: definition of %s\n", abfd
, name
);
1323 if (command_line
.cref
|| nocrossref_list
!= NULL
)
1324 add_cref (name
, abfd
, section
, value
);