1 /* COFF specific linker code.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program 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 of the License, or
10 (at your option) any later version.
12 This program 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 this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* This file contains the COFF backend linker code. */
27 #include "coff/internal.h"
30 static boolean coff_link_add_object_symbols
31 PARAMS ((bfd
*, struct bfd_link_info
*));
32 static boolean coff_link_check_archive_element
33 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
34 static boolean coff_link_check_ar_symbols
35 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
36 static boolean coff_link_add_symbols
PARAMS ((bfd
*, struct bfd_link_info
*));
37 static char *dores_com
PARAMS ((char *, bfd
*, int));
38 static char *get_name
PARAMS ((char *, char **));
39 static int process_embedded_commands
40 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*));
41 static void mark_relocs
PARAMS ((struct coff_final_link_info
*, bfd
*));
43 /* Define macros so that the ISFCN, et. al., macros work correctly.
44 These macros are defined in include/coff/internal.h in terms of
45 N_TMASK, etc. These definitions require a user to define local
46 variables with the appropriate names, and with values from the
47 coff_data (abfd) structure. */
49 #define N_TMASK n_tmask
50 #define N_BTSHFT n_btshft
51 #define N_BTMASK n_btmask
53 /* Create an entry in a COFF linker hash table. */
55 struct bfd_hash_entry
*
56 _bfd_coff_link_hash_newfunc (entry
, table
, string
)
57 struct bfd_hash_entry
*entry
;
58 struct bfd_hash_table
*table
;
61 struct coff_link_hash_entry
*ret
= (struct coff_link_hash_entry
*) entry
;
63 /* Allocate the structure if it has not already been allocated by a
65 if (ret
== (struct coff_link_hash_entry
*) NULL
)
66 ret
= ((struct coff_link_hash_entry
*)
67 bfd_hash_allocate (table
, sizeof (struct coff_link_hash_entry
)));
68 if (ret
== (struct coff_link_hash_entry
*) NULL
)
69 return (struct bfd_hash_entry
*) ret
;
71 /* Call the allocation method of the superclass. */
72 ret
= ((struct coff_link_hash_entry
*)
73 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
75 if (ret
!= (struct coff_link_hash_entry
*) NULL
)
77 /* Set local fields. */
86 return (struct bfd_hash_entry
*) ret
;
89 /* Initialize a COFF linker hash table. */
92 _bfd_coff_link_hash_table_init (table
, abfd
, newfunc
)
93 struct coff_link_hash_table
*table
;
95 struct bfd_hash_entry
*(*newfunc
) PARAMS ((struct bfd_hash_entry
*,
96 struct bfd_hash_table
*,
99 table
->stab_info
= NULL
;
100 return _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
103 /* Create a COFF linker hash table. */
105 struct bfd_link_hash_table
*
106 _bfd_coff_link_hash_table_create (abfd
)
109 struct coff_link_hash_table
*ret
;
111 ret
= ((struct coff_link_hash_table
*)
112 bfd_alloc (abfd
, sizeof (struct coff_link_hash_table
)));
115 if (! _bfd_coff_link_hash_table_init (ret
, abfd
,
116 _bfd_coff_link_hash_newfunc
))
118 bfd_release (abfd
, ret
);
119 return (struct bfd_link_hash_table
*) NULL
;
124 /* Create an entry in a COFF debug merge hash table. */
126 struct bfd_hash_entry
*
127 _bfd_coff_debug_merge_hash_newfunc (entry
, table
, string
)
128 struct bfd_hash_entry
*entry
;
129 struct bfd_hash_table
*table
;
132 struct coff_debug_merge_hash_entry
*ret
=
133 (struct coff_debug_merge_hash_entry
*) entry
;
135 /* Allocate the structure if it has not already been allocated by a
137 if (ret
== (struct coff_debug_merge_hash_entry
*) NULL
)
138 ret
= ((struct coff_debug_merge_hash_entry
*)
139 bfd_hash_allocate (table
,
140 sizeof (struct coff_debug_merge_hash_entry
)));
141 if (ret
== (struct coff_debug_merge_hash_entry
*) NULL
)
142 return (struct bfd_hash_entry
*) ret
;
144 /* Call the allocation method of the superclass. */
145 ret
= ((struct coff_debug_merge_hash_entry
*)
146 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
147 if (ret
!= (struct coff_debug_merge_hash_entry
*) NULL
)
149 /* Set local fields. */
153 return (struct bfd_hash_entry
*) ret
;
156 /* Given a COFF BFD, add symbols to the global hash table as
160 _bfd_coff_link_add_symbols (abfd
, info
)
162 struct bfd_link_info
*info
;
164 switch (bfd_get_format (abfd
))
167 return coff_link_add_object_symbols (abfd
, info
);
169 return (_bfd_generic_link_add_archive_symbols
170 (abfd
, info
, coff_link_check_archive_element
));
172 bfd_set_error (bfd_error_wrong_format
);
177 /* Add symbols from a COFF object file. */
180 coff_link_add_object_symbols (abfd
, info
)
182 struct bfd_link_info
*info
;
184 if (! _bfd_coff_get_external_symbols (abfd
))
186 if (! coff_link_add_symbols (abfd
, info
))
189 if (! info
->keep_memory
)
191 if (! _bfd_coff_free_symbols (abfd
))
197 /* Check a single archive element to see if we need to include it in
198 the link. *PNEEDED is set according to whether this element is
199 needed in the link or not. This is called via
200 _bfd_generic_link_add_archive_symbols. */
203 coff_link_check_archive_element (abfd
, info
, pneeded
)
205 struct bfd_link_info
*info
;
208 if (! _bfd_coff_get_external_symbols (abfd
))
211 if (! coff_link_check_ar_symbols (abfd
, info
, pneeded
))
216 if (! coff_link_add_symbols (abfd
, info
))
220 if (! info
->keep_memory
|| ! *pneeded
)
222 if (! _bfd_coff_free_symbols (abfd
))
229 /* Look through the symbols to see if this object file should be
230 included in the link. */
233 coff_link_check_ar_symbols (abfd
, info
, pneeded
)
235 struct bfd_link_info
*info
;
238 bfd_size_type symesz
;
244 symesz
= bfd_coff_symesz (abfd
);
245 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
246 esym_end
= esym
+ obj_raw_syment_count (abfd
) * symesz
;
247 while (esym
< esym_end
)
249 struct internal_syment sym
;
250 enum coff_symbol_classification classification
;
252 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &sym
);
254 classification
= bfd_coff_classify_symbol (abfd
, &sym
);
255 if (classification
== COFF_SYMBOL_GLOBAL
256 || classification
== COFF_SYMBOL_COMMON
)
259 char buf
[SYMNMLEN
+ 1];
260 struct bfd_link_hash_entry
*h
;
262 /* This symbol is externally visible, and is defined by this
265 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
268 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
270 /* We are only interested in symbols that are currently
271 undefined. If a symbol is currently known to be common,
272 COFF linkers do not bring in an object file which defines
274 if (h
!= (struct bfd_link_hash_entry
*) NULL
275 && h
->type
== bfd_link_hash_undefined
)
277 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
284 esym
+= (sym
.n_numaux
+ 1) * symesz
;
287 /* We do not need this object file. */
291 /* Add all the symbols from an object file to the hash table. */
294 coff_link_add_symbols (abfd
, info
)
296 struct bfd_link_info
*info
;
298 unsigned int n_tmask
= coff_data (abfd
)->local_n_tmask
;
299 unsigned int n_btshft
= coff_data (abfd
)->local_n_btshft
;
300 unsigned int n_btmask
= coff_data (abfd
)->local_n_btmask
;
302 boolean default_copy
;
303 bfd_size_type symcount
;
304 struct coff_link_hash_entry
**sym_hash
;
305 bfd_size_type symesz
;
309 /* Keep the symbols during this function, in case the linker needs
310 to read the generic symbols in order to report an error message. */
311 keep_syms
= obj_coff_keep_syms (abfd
);
312 obj_coff_keep_syms (abfd
) = true;
314 if (info
->keep_memory
)
315 default_copy
= false;
319 symcount
= obj_raw_syment_count (abfd
);
321 /* We keep a list of the linker hash table entries that correspond
322 to particular symbols. */
323 sym_hash
= ((struct coff_link_hash_entry
**)
326 * sizeof (struct coff_link_hash_entry
*))));
327 if (sym_hash
== NULL
&& symcount
!= 0)
329 obj_coff_sym_hashes (abfd
) = sym_hash
;
331 (size_t) symcount
* sizeof (struct coff_link_hash_entry
*));
333 symesz
= bfd_coff_symesz (abfd
);
334 BFD_ASSERT (symesz
== bfd_coff_auxesz (abfd
));
335 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
336 esym_end
= esym
+ symcount
* symesz
;
337 while (esym
< esym_end
)
339 struct internal_syment sym
;
340 enum coff_symbol_classification classification
;
343 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &sym
);
345 classification
= bfd_coff_classify_symbol (abfd
, &sym
);
346 if (classification
!= COFF_SYMBOL_LOCAL
)
349 char buf
[SYMNMLEN
+ 1];
355 /* This symbol is externally visible. */
357 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
361 /* We must copy the name into memory if we got it from the
362 syment itself, rather than the string table. */
364 if (sym
._n
._n_n
._n_zeroes
!= 0
365 || sym
._n
._n_n
._n_offset
== 0)
370 switch (classification
)
375 case COFF_SYMBOL_GLOBAL
:
376 flags
= BSF_EXPORT
| BSF_GLOBAL
;
377 section
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
379 value
-= section
->vma
;
382 case COFF_SYMBOL_UNDEFINED
:
384 section
= bfd_und_section_ptr
;
387 case COFF_SYMBOL_COMMON
:
389 section
= bfd_com_section_ptr
;
392 case COFF_SYMBOL_PE_SECTION
:
393 flags
= BSF_SECTION_SYM
| BSF_GLOBAL
;
394 section
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
398 if (sym
.n_sclass
== C_WEAKEXT
399 || (obj_pe (abfd
) && sym
.n_sclass
== C_NT_WEAK
))
404 /* In the PE format, section symbols actually refer to the
405 start of the output section. We handle them specially
407 if (obj_pe (abfd
) && (flags
& BSF_SECTION_SYM
) != 0)
409 *sym_hash
= coff_link_hash_lookup (coff_hash_table (info
),
410 name
, false, copy
, false);
411 if (*sym_hash
!= NULL
)
413 if (((*sym_hash
)->coff_link_hash_flags
414 & COFF_LINK_HASH_PE_SECTION_SYMBOL
) == 0
415 && (*sym_hash
)->root
.type
!= bfd_link_hash_undefined
416 && (*sym_hash
)->root
.type
!= bfd_link_hash_undefweak
)
417 (*_bfd_error_handler
)
418 ("Warning: symbol `%s' is both section and non-section",
427 if (! (bfd_coff_link_add_one_symbol
428 (info
, abfd
, name
, flags
, section
, value
,
429 (const char *) NULL
, copy
, false,
430 (struct bfd_link_hash_entry
**) sym_hash
)))
434 if (obj_pe (abfd
) && (flags
& BSF_SECTION_SYM
) != 0)
435 (*sym_hash
)->coff_link_hash_flags
|=
436 COFF_LINK_HASH_PE_SECTION_SYMBOL
;
438 /* Limit the alignment of a common symbol to the possible
439 alignment of a section. There is no point to permitting
440 a higher alignment for a common symbol: we can not
441 guarantee it, and it may cause us to allocate extra space
442 in the common section. */
443 if (section
== bfd_com_section_ptr
444 && (*sym_hash
)->root
.type
== bfd_link_hash_common
445 && ((*sym_hash
)->root
.u
.c
.p
->alignment_power
446 > bfd_coff_default_section_alignment_power (abfd
)))
447 (*sym_hash
)->root
.u
.c
.p
->alignment_power
448 = bfd_coff_default_section_alignment_power (abfd
);
450 if (info
->hash
->creator
->flavour
== bfd_get_flavour (abfd
))
452 /* If we don't have any symbol information currently in
453 the hash table, or if we are looking at a symbol
454 definition, then update the symbol class and type in
456 if (((*sym_hash
)->class == C_NULL
457 && (*sym_hash
)->type
== T_NULL
)
460 && (*sym_hash
)->root
.type
!= bfd_link_hash_defined
461 && (*sym_hash
)->root
.type
!= bfd_link_hash_defweak
))
463 (*sym_hash
)->class = sym
.n_sclass
;
464 if (sym
.n_type
!= T_NULL
)
466 /* We want to warn if the type changed, but not
467 if it changed from an unspecified type.
468 Testing the whole type byte may work, but the
469 change from (e.g.) a function of unspecified
470 type to function of known type also wants to
472 if ((*sym_hash
)->type
!= T_NULL
473 && (*sym_hash
)->type
!= sym
.n_type
474 && !(DTYPE ((*sym_hash
)->type
) == DTYPE (sym
.n_type
)
475 && (BTYPE ((*sym_hash
)->type
) == T_NULL
476 || BTYPE (sym
.n_type
) == T_NULL
)))
477 (*_bfd_error_handler
)
478 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
479 name
, (*sym_hash
)->type
, sym
.n_type
,
480 bfd_get_filename (abfd
));
482 /* We don't want to change from a meaningful
483 base type to a null one, but if we know
484 nothing, take what little we might now know. */
485 if (BTYPE (sym
.n_type
) != T_NULL
486 || (*sym_hash
)->type
== T_NULL
)
487 (*sym_hash
)->type
= sym
.n_type
;
489 (*sym_hash
)->auxbfd
= abfd
;
490 if (sym
.n_numaux
!= 0)
492 union internal_auxent
*alloc
;
495 union internal_auxent
*iaux
;
497 (*sym_hash
)->numaux
= sym
.n_numaux
;
498 alloc
= ((union internal_auxent
*)
499 bfd_hash_allocate (&info
->hash
->table
,
501 * sizeof (*alloc
))));
504 for (i
= 0, eaux
= esym
+ symesz
, iaux
= alloc
;
506 i
++, eaux
+= symesz
, iaux
++)
507 bfd_coff_swap_aux_in (abfd
, (PTR
) eaux
, sym
.n_type
,
508 sym
.n_sclass
, i
, sym
.n_numaux
,
510 (*sym_hash
)->aux
= alloc
;
515 if (classification
== COFF_SYMBOL_PE_SECTION
516 && (*sym_hash
)->numaux
!= 0)
518 /* Some PE sections (such as .bss) have a zero size in
519 the section header, but a non-zero size in the AUX
520 record. Correct that here.
522 FIXME: This is not at all the right place to do this.
523 For example, it won't help objdump. This needs to be
524 done when we swap in the section header. */
526 BFD_ASSERT ((*sym_hash
)->numaux
== 1);
527 if (section
->_raw_size
== 0)
528 section
->_raw_size
= (*sym_hash
)->aux
[0].x_scn
.x_scnlen
;
530 /* FIXME: We could test whether the section sizes
531 matches the size in the aux entry, but apparently
532 that sometimes fails unexpectedly. */
536 esym
+= (sym
.n_numaux
+ 1) * symesz
;
537 sym_hash
+= sym
.n_numaux
+ 1;
540 /* If this is a non-traditional, non-relocateable link, try to
541 optimize the handling of any .stab/.stabstr sections. */
542 if (! info
->relocateable
543 && ! info
->traditional_format
544 && info
->hash
->creator
->flavour
== bfd_get_flavour (abfd
)
545 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
547 asection
*stab
, *stabstr
;
549 stab
= bfd_get_section_by_name (abfd
, ".stab");
552 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
556 struct coff_link_hash_table
*table
;
557 struct coff_section_tdata
*secdata
;
559 secdata
= coff_section_data (abfd
, stab
);
563 (PTR
) bfd_zalloc (abfd
,
564 sizeof (struct coff_section_tdata
));
565 if (stab
->used_by_bfd
== NULL
)
567 secdata
= coff_section_data (abfd
, stab
);
570 table
= coff_hash_table (info
);
572 if (! _bfd_link_section_stabs (abfd
, &table
->stab_info
,
574 &secdata
->stab_info
))
580 obj_coff_keep_syms (abfd
) = keep_syms
;
585 obj_coff_keep_syms (abfd
) = keep_syms
;
589 /* Do the final link step. */
592 _bfd_coff_final_link (abfd
, info
)
594 struct bfd_link_info
*info
;
596 bfd_size_type symesz
;
597 struct coff_final_link_info finfo
;
598 boolean debug_merge_allocated
;
599 boolean long_section_names
;
601 struct bfd_link_order
*p
;
602 size_t max_sym_count
;
603 size_t max_lineno_count
;
604 size_t max_reloc_count
;
605 size_t max_output_reloc_count
;
606 size_t max_contents_size
;
607 file_ptr rel_filepos
;
609 file_ptr line_filepos
;
612 bfd_byte
*external_relocs
= NULL
;
613 char strbuf
[STRING_SIZE_SIZE
];
615 symesz
= bfd_coff_symesz (abfd
);
618 finfo
.output_bfd
= abfd
;
620 finfo
.section_info
= NULL
;
621 finfo
.last_file_index
= -1;
622 finfo
.last_bf_index
= -1;
623 finfo
.internal_syms
= NULL
;
624 finfo
.sec_ptrs
= NULL
;
625 finfo
.sym_indices
= NULL
;
626 finfo
.outsyms
= NULL
;
627 finfo
.linenos
= NULL
;
628 finfo
.contents
= NULL
;
629 finfo
.external_relocs
= NULL
;
630 finfo
.internal_relocs
= NULL
;
631 finfo
.global_to_static
= false;
632 debug_merge_allocated
= false;
634 coff_data (abfd
)->link_info
= info
;
636 finfo
.strtab
= _bfd_stringtab_init ();
637 if (finfo
.strtab
== NULL
)
640 if (! coff_debug_merge_hash_table_init (&finfo
.debug_merge
))
642 debug_merge_allocated
= true;
644 /* Compute the file positions for all the sections. */
645 if (! abfd
->output_has_begun
)
647 if (! bfd_coff_compute_section_file_positions (abfd
))
651 /* Count the line numbers and relocation entries required for the
652 output file. Set the file positions for the relocs. */
653 rel_filepos
= obj_relocbase (abfd
);
654 relsz
= bfd_coff_relsz (abfd
);
655 max_contents_size
= 0;
656 max_lineno_count
= 0;
659 long_section_names
= false;
660 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
664 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
666 if (p
->type
== bfd_indirect_link_order
)
670 sec
= p
->u
.indirect
.section
;
672 /* Mark all sections which are to be included in the
673 link. This will normally be every section. We need
674 to do this so that we can identify any sections which
675 the linker has decided to not include. */
676 sec
->linker_mark
= true;
678 if (info
->strip
== strip_none
679 || info
->strip
== strip_some
)
680 o
->lineno_count
+= sec
->lineno_count
;
682 if (info
->relocateable
)
683 o
->reloc_count
+= sec
->reloc_count
;
685 if (sec
->_raw_size
> max_contents_size
)
686 max_contents_size
= sec
->_raw_size
;
687 if (sec
->lineno_count
> max_lineno_count
)
688 max_lineno_count
= sec
->lineno_count
;
689 if (sec
->reloc_count
> max_reloc_count
)
690 max_reloc_count
= sec
->reloc_count
;
692 else if (info
->relocateable
693 && (p
->type
== bfd_section_reloc_link_order
694 || p
->type
== bfd_symbol_reloc_link_order
))
697 if (o
->reloc_count
== 0)
701 o
->flags
|= SEC_RELOC
;
702 o
->rel_filepos
= rel_filepos
;
703 rel_filepos
+= o
->reloc_count
* relsz
;
706 if (bfd_coff_long_section_names (abfd
)
707 && strlen (o
->name
) > SCNNMLEN
)
709 /* This section has a long name which must go in the string
710 table. This must correspond to the code in
711 coff_write_object_contents which puts the string index
712 into the s_name field of the section header. That is why
713 we pass hash as false. */
714 if (_bfd_stringtab_add (finfo
.strtab
, o
->name
, false, false)
715 == (bfd_size_type
) -1)
717 long_section_names
= true;
721 /* If doing a relocateable link, allocate space for the pointers we
723 if (info
->relocateable
)
727 /* We use section_count + 1, rather than section_count, because
728 the target_index fields are 1 based. */
730 ((struct coff_link_section_info
*)
731 bfd_malloc ((abfd
->section_count
+ 1)
732 * sizeof (struct coff_link_section_info
)));
733 if (finfo
.section_info
== NULL
)
735 for (i
= 0; i
<= abfd
->section_count
; i
++)
737 finfo
.section_info
[i
].relocs
= NULL
;
738 finfo
.section_info
[i
].rel_hashes
= NULL
;
742 /* We now know the size of the relocs, so we can determine the file
743 positions of the line numbers. */
744 line_filepos
= rel_filepos
;
745 linesz
= bfd_coff_linesz (abfd
);
746 max_output_reloc_count
= 0;
747 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
749 if (o
->lineno_count
== 0)
753 o
->line_filepos
= line_filepos
;
754 line_filepos
+= o
->lineno_count
* linesz
;
757 if (o
->reloc_count
!= 0)
759 /* We don't know the indices of global symbols until we have
760 written out all the local symbols. For each section in
761 the output file, we keep an array of pointers to hash
762 table entries. Each entry in the array corresponds to a
763 reloc. When we find a reloc against a global symbol, we
764 set the corresponding entry in this array so that we can
765 fix up the symbol index after we have written out all the
768 Because of this problem, we also keep the relocs in
769 memory until the end of the link. This wastes memory,
770 but only when doing a relocateable link, which is not the
772 BFD_ASSERT (info
->relocateable
);
773 finfo
.section_info
[o
->target_index
].relocs
=
774 ((struct internal_reloc
*)
775 bfd_malloc (o
->reloc_count
* sizeof (struct internal_reloc
)));
776 finfo
.section_info
[o
->target_index
].rel_hashes
=
777 ((struct coff_link_hash_entry
**)
778 bfd_malloc (o
->reloc_count
779 * sizeof (struct coff_link_hash_entry
*)));
780 if (finfo
.section_info
[o
->target_index
].relocs
== NULL
781 || finfo
.section_info
[o
->target_index
].rel_hashes
== NULL
)
784 if (o
->reloc_count
> max_output_reloc_count
)
785 max_output_reloc_count
= o
->reloc_count
;
788 /* Reset the reloc and lineno counts, so that we can use them to
789 count the number of entries we have output so far. */
794 obj_sym_filepos (abfd
) = line_filepos
;
796 /* Figure out the largest number of symbols in an input BFD. Take
797 the opportunity to clear the output_has_begun fields of all the
800 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
804 sub
->output_has_begun
= false;
805 sz
= obj_raw_syment_count (sub
);
806 if (sz
> max_sym_count
)
810 /* Allocate some buffers used while linking. */
811 finfo
.internal_syms
= ((struct internal_syment
*)
812 bfd_malloc (max_sym_count
813 * sizeof (struct internal_syment
)));
814 finfo
.sec_ptrs
= (asection
**) bfd_malloc (max_sym_count
815 * sizeof (asection
*));
816 finfo
.sym_indices
= (long *) bfd_malloc (max_sym_count
* sizeof (long));
817 finfo
.outsyms
= ((bfd_byte
*)
818 bfd_malloc ((size_t) ((max_sym_count
+ 1) * symesz
)));
819 finfo
.linenos
= (bfd_byte
*) bfd_malloc (max_lineno_count
820 * bfd_coff_linesz (abfd
));
821 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
822 finfo
.external_relocs
= (bfd_byte
*) bfd_malloc (max_reloc_count
* relsz
);
823 if (! info
->relocateable
)
824 finfo
.internal_relocs
= ((struct internal_reloc
*)
825 bfd_malloc (max_reloc_count
826 * sizeof (struct internal_reloc
)));
827 if ((finfo
.internal_syms
== NULL
&& max_sym_count
> 0)
828 || (finfo
.sec_ptrs
== NULL
&& max_sym_count
> 0)
829 || (finfo
.sym_indices
== NULL
&& max_sym_count
> 0)
830 || finfo
.outsyms
== NULL
831 || (finfo
.linenos
== NULL
&& max_lineno_count
> 0)
832 || (finfo
.contents
== NULL
&& max_contents_size
> 0)
833 || (finfo
.external_relocs
== NULL
&& max_reloc_count
> 0)
834 || (! info
->relocateable
835 && finfo
.internal_relocs
== NULL
836 && max_reloc_count
> 0))
839 /* We now know the position of everything in the file, except that
840 we don't know the size of the symbol table and therefore we don't
841 know where the string table starts. We just build the string
842 table in memory as we go along. We process all the relocations
843 for a single input file at once. */
844 obj_raw_syment_count (abfd
) = 0;
846 if (coff_backend_info (abfd
)->_bfd_coff_start_final_link
)
848 if (! bfd_coff_start_final_link (abfd
, info
))
852 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
854 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
856 if (p
->type
== bfd_indirect_link_order
857 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
858 == bfd_target_coff_flavour
))
860 sub
= p
->u
.indirect
.section
->owner
;
861 if (! bfd_coff_link_output_has_begun (sub
, & finfo
))
863 if (! _bfd_coff_link_input_bfd (&finfo
, sub
))
865 sub
->output_has_begun
= true;
868 else if (p
->type
== bfd_section_reloc_link_order
869 || p
->type
== bfd_symbol_reloc_link_order
)
871 if (! _bfd_coff_reloc_link_order (abfd
, &finfo
, o
, p
))
876 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
882 if (! bfd_coff_final_link_postscript (abfd
, & finfo
))
885 /* Free up the buffers used by _bfd_coff_link_input_bfd. */
887 coff_debug_merge_hash_table_free (&finfo
.debug_merge
);
888 debug_merge_allocated
= false;
890 if (finfo
.internal_syms
!= NULL
)
892 free (finfo
.internal_syms
);
893 finfo
.internal_syms
= NULL
;
895 if (finfo
.sec_ptrs
!= NULL
)
897 free (finfo
.sec_ptrs
);
898 finfo
.sec_ptrs
= NULL
;
900 if (finfo
.sym_indices
!= NULL
)
902 free (finfo
.sym_indices
);
903 finfo
.sym_indices
= NULL
;
905 if (finfo
.linenos
!= NULL
)
907 free (finfo
.linenos
);
908 finfo
.linenos
= NULL
;
910 if (finfo
.contents
!= NULL
)
912 free (finfo
.contents
);
913 finfo
.contents
= NULL
;
915 if (finfo
.external_relocs
!= NULL
)
917 free (finfo
.external_relocs
);
918 finfo
.external_relocs
= NULL
;
920 if (finfo
.internal_relocs
!= NULL
)
922 free (finfo
.internal_relocs
);
923 finfo
.internal_relocs
= NULL
;
926 /* The value of the last C_FILE symbol is supposed to be the symbol
927 index of the first external symbol. Write it out again if
929 if (finfo
.last_file_index
!= -1
930 && (unsigned int) finfo
.last_file
.n_value
!= obj_raw_syment_count (abfd
))
932 finfo
.last_file
.n_value
= obj_raw_syment_count (abfd
);
933 bfd_coff_swap_sym_out (abfd
, (PTR
) &finfo
.last_file
,
934 (PTR
) finfo
.outsyms
);
936 (obj_sym_filepos (abfd
)
937 + finfo
.last_file_index
* symesz
),
939 || bfd_write (finfo
.outsyms
, symesz
, 1, abfd
) != symesz
)
943 /* If doing task linking (ld --task-link) then make a pass through the
944 global symbols, writing out any that are defined, and making them
948 finfo
.failed
= false;
949 coff_link_hash_traverse (coff_hash_table (info
), _bfd_coff_write_task_globals
,
955 /* Write out the global symbols. */
956 finfo
.failed
= false;
957 coff_link_hash_traverse (coff_hash_table (info
), _bfd_coff_write_global_sym
,
962 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
963 if (finfo
.outsyms
!= NULL
)
965 free (finfo
.outsyms
);
966 finfo
.outsyms
= NULL
;
969 if (info
->relocateable
&& max_output_reloc_count
> 0)
971 /* Now that we have written out all the global symbols, we know
972 the symbol indices to use for relocs against them, and we can
973 finally write out the relocs. */
974 external_relocs
= ((bfd_byte
*)
975 bfd_malloc (max_output_reloc_count
* relsz
));
976 if (external_relocs
== NULL
)
979 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
981 struct internal_reloc
*irel
;
982 struct internal_reloc
*irelend
;
983 struct coff_link_hash_entry
**rel_hash
;
986 if (o
->reloc_count
== 0)
989 irel
= finfo
.section_info
[o
->target_index
].relocs
;
990 irelend
= irel
+ o
->reloc_count
;
991 rel_hash
= finfo
.section_info
[o
->target_index
].rel_hashes
;
992 erel
= external_relocs
;
993 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
995 if (*rel_hash
!= NULL
)
997 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
998 irel
->r_symndx
= (*rel_hash
)->indx
;
1000 bfd_coff_swap_reloc_out (abfd
, (PTR
) irel
, (PTR
) erel
);
1003 if (bfd_seek (abfd
, o
->rel_filepos
, SEEK_SET
) != 0
1004 || bfd_write ((PTR
) external_relocs
, relsz
, o
->reloc_count
,
1005 abfd
) != relsz
* o
->reloc_count
)
1009 free (external_relocs
);
1010 external_relocs
= NULL
;
1013 /* Free up the section information. */
1014 if (finfo
.section_info
!= NULL
)
1018 for (i
= 0; i
< abfd
->section_count
; i
++)
1020 if (finfo
.section_info
[i
].relocs
!= NULL
)
1021 free (finfo
.section_info
[i
].relocs
);
1022 if (finfo
.section_info
[i
].rel_hashes
!= NULL
)
1023 free (finfo
.section_info
[i
].rel_hashes
);
1025 free (finfo
.section_info
);
1026 finfo
.section_info
= NULL
;
1029 /* If we have optimized stabs strings, output them. */
1030 if (coff_hash_table (info
)->stab_info
!= NULL
)
1032 if (! _bfd_write_stab_strings (abfd
, &coff_hash_table (info
)->stab_info
))
1036 /* Write out the string table. */
1037 if (obj_raw_syment_count (abfd
) != 0 || long_section_names
)
1040 (obj_sym_filepos (abfd
)
1041 + obj_raw_syment_count (abfd
) * symesz
),
1045 #if STRING_SIZE_SIZE == 4
1047 _bfd_stringtab_size (finfo
.strtab
) + STRING_SIZE_SIZE
,
1048 (bfd_byte
*) strbuf
);
1050 #error Change bfd_h_put_32
1053 if (bfd_write (strbuf
, 1, STRING_SIZE_SIZE
, abfd
) != STRING_SIZE_SIZE
)
1056 if (! _bfd_stringtab_emit (abfd
, finfo
.strtab
))
1060 _bfd_stringtab_free (finfo
.strtab
);
1062 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
1063 not try to write out the symbols. */
1064 bfd_get_symcount (abfd
) = 0;
1069 if (debug_merge_allocated
)
1070 coff_debug_merge_hash_table_free (&finfo
.debug_merge
);
1071 if (finfo
.strtab
!= NULL
)
1072 _bfd_stringtab_free (finfo
.strtab
);
1073 if (finfo
.section_info
!= NULL
)
1077 for (i
= 0; i
< abfd
->section_count
; i
++)
1079 if (finfo
.section_info
[i
].relocs
!= NULL
)
1080 free (finfo
.section_info
[i
].relocs
);
1081 if (finfo
.section_info
[i
].rel_hashes
!= NULL
)
1082 free (finfo
.section_info
[i
].rel_hashes
);
1084 free (finfo
.section_info
);
1086 if (finfo
.internal_syms
!= NULL
)
1087 free (finfo
.internal_syms
);
1088 if (finfo
.sec_ptrs
!= NULL
)
1089 free (finfo
.sec_ptrs
);
1090 if (finfo
.sym_indices
!= NULL
)
1091 free (finfo
.sym_indices
);
1092 if (finfo
.outsyms
!= NULL
)
1093 free (finfo
.outsyms
);
1094 if (finfo
.linenos
!= NULL
)
1095 free (finfo
.linenos
);
1096 if (finfo
.contents
!= NULL
)
1097 free (finfo
.contents
);
1098 if (finfo
.external_relocs
!= NULL
)
1099 free (finfo
.external_relocs
);
1100 if (finfo
.internal_relocs
!= NULL
)
1101 free (finfo
.internal_relocs
);
1102 if (external_relocs
!= NULL
)
1103 free (external_relocs
);
1107 /* parse out a -heap <reserved>,<commit> line */
1110 dores_com (ptr
, output_bfd
, heap
)
1115 if (coff_data(output_bfd
)->pe
)
1117 int val
= strtoul (ptr
, &ptr
, 0);
1119 pe_data(output_bfd
)->pe_opthdr
.SizeOfHeapReserve
=val
;
1121 pe_data(output_bfd
)->pe_opthdr
.SizeOfStackReserve
=val
;
1125 int val
= strtoul (ptr
+1, &ptr
, 0);
1127 pe_data(output_bfd
)->pe_opthdr
.SizeOfHeapCommit
=val
;
1129 pe_data(output_bfd
)->pe_opthdr
.SizeOfStackCommit
=val
;
1135 static char *get_name(ptr
, dst
)
1142 while (*ptr
&& *ptr
!= ' ')
1148 /* Process any magic embedded commands in a section called .drectve */
1151 process_embedded_commands (output_bfd
, info
, abfd
)
1153 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1156 asection
*sec
= bfd_get_section_by_name (abfd
, ".drectve");
1163 copy
= bfd_malloc ((size_t) sec
->_raw_size
);
1166 if (! bfd_get_section_contents(abfd
, sec
, copy
, 0, sec
->_raw_size
))
1171 e
= copy
+ sec
->_raw_size
;
1172 for (s
= copy
; s
< e
; )
1178 if (strncmp (s
,"-attr", 5) == 0)
1190 s
= get_name(s
, &name
);
1191 s
= get_name(s
, &attribs
);
1211 asec
= bfd_get_section_by_name (abfd
, name
);
1214 asec
->flags
|= SEC_CODE
;
1216 asec
->flags
|= SEC_READONLY
;
1219 else if (strncmp (s
,"-heap", 5) == 0)
1221 s
= dores_com (s
+5, output_bfd
, 1);
1223 else if (strncmp (s
,"-stack", 6) == 0)
1225 s
= dores_com (s
+6, output_bfd
, 0);
1234 /* Place a marker against all symbols which are used by relocations.
1235 This marker can be picked up by the 'do we skip this symbol ?'
1236 loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1241 mark_relocs (finfo
, input_bfd
)
1242 struct coff_final_link_info
* finfo
;
1247 if ((bfd_get_file_flags (input_bfd
) & HAS_SYMS
) == 0)
1250 for (a
= input_bfd
->sections
; a
!= (asection
*) NULL
; a
= a
->next
)
1252 struct internal_reloc
* internal_relocs
;
1253 struct internal_reloc
* irel
;
1254 struct internal_reloc
* irelend
;
1257 if ((a
->flags
& SEC_RELOC
) == 0 || a
->reloc_count
< 1)
1260 /* Read in the relocs. */
1261 internal_relocs
= _bfd_coff_read_internal_relocs
1262 (input_bfd
, a
, false,
1263 finfo
->external_relocs
,
1264 finfo
->info
->relocateable
,
1265 (finfo
->info
->relocateable
1266 ? (finfo
->section_info
[ a
->output_section
->target_index
].relocs
+ a
->output_section
->reloc_count
)
1267 : finfo
->internal_relocs
)
1270 if (internal_relocs
== NULL
)
1273 irel
= internal_relocs
;
1274 irelend
= irel
+ a
->reloc_count
;
1276 /* Place a mark in the sym_indices array (whose entries have
1277 been initialised to 0) for all of the symbols that are used
1278 in the relocation table. This will then be picked up in the
1281 for (; irel
< irelend
; irel
++)
1283 finfo
->sym_indices
[ irel
->r_symndx
] = -1;
1288 /* Link an input file into the linker output file. This function
1289 handles all the sections and relocations of the input file at once. */
1292 _bfd_coff_link_input_bfd (finfo
, input_bfd
)
1293 struct coff_final_link_info
*finfo
;
1296 unsigned int n_tmask
= coff_data (input_bfd
)->local_n_tmask
;
1297 unsigned int n_btshft
= coff_data (input_bfd
)->local_n_btshft
;
1299 unsigned int n_btmask
= coff_data (input_bfd
)->local_n_btmask
;
1301 boolean (*adjust_symndx
) PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*,
1302 asection
*, struct internal_reloc
*,
1305 const char *strings
;
1306 bfd_size_type syment_base
;
1308 bfd_size_type isymesz
;
1309 bfd_size_type osymesz
;
1310 bfd_size_type linesz
;
1313 struct internal_syment
*isymp
;
1316 unsigned long output_index
;
1318 struct coff_link_hash_entry
**sym_hash
;
1321 /* Move all the symbols to the output file. */
1323 output_bfd
= finfo
->output_bfd
;
1325 syment_base
= obj_raw_syment_count (output_bfd
);
1326 isymesz
= bfd_coff_symesz (input_bfd
);
1327 osymesz
= bfd_coff_symesz (output_bfd
);
1328 linesz
= bfd_coff_linesz (input_bfd
);
1329 BFD_ASSERT (linesz
== bfd_coff_linesz (output_bfd
));
1332 if (! finfo
->info
->keep_memory
)
1335 if ((output_bfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
1338 if (! _bfd_coff_get_external_symbols (input_bfd
))
1341 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
1342 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
1343 isymp
= finfo
->internal_syms
;
1344 secpp
= finfo
->sec_ptrs
;
1345 indexp
= finfo
->sym_indices
;
1346 output_index
= syment_base
;
1347 outsym
= finfo
->outsyms
;
1349 if (coff_data (output_bfd
)->pe
)
1351 if (! process_embedded_commands (output_bfd
, finfo
->info
, input_bfd
))
1355 /* If we are going to perform relocations and also strip/discard some symbols
1356 then we must make sure that we do not strip/discard those symbols that are
1357 going to be involved in the relocations */
1358 if (( finfo
->info
->strip
!= strip_none
1359 || finfo
->info
->discard
!= discard_none
)
1360 && finfo
->info
->relocateable
)
1362 /* mark the symbol array as 'not-used' */
1363 memset (indexp
, 0, obj_raw_syment_count (input_bfd
) * sizeof * indexp
);
1365 mark_relocs (finfo
, input_bfd
);
1368 while (esym
< esym_end
)
1370 struct internal_syment isym
;
1371 enum coff_symbol_classification classification
;
1374 boolean dont_skip_symbol
;
1377 bfd_coff_swap_sym_in (input_bfd
, (PTR
) esym
, (PTR
) isymp
);
1379 /* Make a copy of *isymp so that the relocate_section function
1380 always sees the original values. This is more reliable than
1381 always recomputing the symbol value even if we are stripping
1385 classification
= bfd_coff_classify_symbol (input_bfd
, &isym
);
1386 switch (classification
)
1390 case COFF_SYMBOL_GLOBAL
:
1391 case COFF_SYMBOL_PE_SECTION
:
1392 case COFF_SYMBOL_LOCAL
:
1393 *secpp
= coff_section_from_bfd_index (input_bfd
, isym
.n_scnum
);
1395 case COFF_SYMBOL_COMMON
:
1396 *secpp
= bfd_com_section_ptr
;
1398 case COFF_SYMBOL_UNDEFINED
:
1399 *secpp
= bfd_und_section_ptr
;
1403 /* Extract the flag indicating if this symbol is used by a
1405 if ((finfo
->info
->strip
!= strip_none
1406 || finfo
->info
->discard
!= discard_none
)
1407 && finfo
->info
->relocateable
)
1408 dont_skip_symbol
= *indexp
;
1410 dont_skip_symbol
= false;
1416 add
= 1 + isym
.n_numaux
;
1418 /* If we are stripping all symbols, we want to skip this one. */
1419 if (finfo
->info
->strip
== strip_all
&& ! dont_skip_symbol
)
1424 switch (classification
)
1428 case COFF_SYMBOL_GLOBAL
:
1429 case COFF_SYMBOL_COMMON
:
1430 case COFF_SYMBOL_PE_SECTION
:
1431 /* This is a global symbol. Global symbols come at the
1432 end of the symbol table, so skip them for now.
1433 Locally defined function symbols, however, are an
1434 exception, and are not moved to the end. */
1436 if (! ISFCN (isym
.n_type
))
1440 case COFF_SYMBOL_UNDEFINED
:
1441 /* Undefined symbols are left for the end. */
1446 case COFF_SYMBOL_LOCAL
:
1447 /* This is a local symbol. Skip it if we are discarding
1449 if (finfo
->info
->discard
== discard_all
&& ! dont_skip_symbol
)
1455 /* If we stripping debugging symbols, and this is a debugging
1456 symbol, then skip it. FIXME: gas sets the section to N_ABS
1457 for some types of debugging symbols; I don't know if this is
1458 a bug or not. In any case, we handle it here. */
1460 && finfo
->info
->strip
== strip_debugger
1461 && ! dont_skip_symbol
1462 && (isym
.n_scnum
== N_DEBUG
1463 || (isym
.n_scnum
== N_ABS
1464 && (isym
.n_sclass
== C_AUTO
1465 || isym
.n_sclass
== C_REG
1466 || isym
.n_sclass
== C_MOS
1467 || isym
.n_sclass
== C_MOE
1468 || isym
.n_sclass
== C_MOU
1469 || isym
.n_sclass
== C_ARG
1470 || isym
.n_sclass
== C_REGPARM
1471 || isym
.n_sclass
== C_FIELD
1472 || isym
.n_sclass
== C_EOS
))))
1475 /* If some symbols are stripped based on the name, work out the
1476 name and decide whether to skip this symbol. */
1478 && (finfo
->info
->strip
== strip_some
1479 || finfo
->info
->discard
== discard_l
))
1482 char buf
[SYMNMLEN
+ 1];
1484 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, buf
);
1488 if (! dont_skip_symbol
1489 && ((finfo
->info
->strip
== strip_some
1490 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false,
1493 && finfo
->info
->discard
== discard_l
1494 && bfd_is_local_label_name (input_bfd
, name
))))
1498 /* If this is an enum, struct, or union tag, see if we have
1499 already output an identical type. */
1501 && (finfo
->output_bfd
->flags
& BFD_TRADITIONAL_FORMAT
) == 0
1502 && (isym
.n_sclass
== C_ENTAG
1503 || isym
.n_sclass
== C_STRTAG
1504 || isym
.n_sclass
== C_UNTAG
)
1505 && isym
.n_numaux
== 1)
1508 char buf
[SYMNMLEN
+ 1];
1509 struct coff_debug_merge_hash_entry
*mh
;
1510 struct coff_debug_merge_type
*mt
;
1511 union internal_auxent aux
;
1512 struct coff_debug_merge_element
**epp
;
1513 bfd_byte
*esl
, *eslend
;
1514 struct internal_syment
*islp
;
1516 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, buf
);
1520 /* Ignore fake names invented by compiler; treat them all as
1522 if (*name
== '~' || *name
== '.' || *name
== '$'
1523 || (*name
== bfd_get_symbol_leading_char (input_bfd
)
1524 && (name
[1] == '~' || name
[1] == '.' || name
[1] == '$')))
1527 mh
= coff_debug_merge_hash_lookup (&finfo
->debug_merge
, name
,
1532 /* Allocate memory to hold type information. If this turns
1533 out to be a duplicate, we pass this address to
1535 mt
= ((struct coff_debug_merge_type
*)
1536 bfd_alloc (input_bfd
,
1537 sizeof (struct coff_debug_merge_type
)));
1540 mt
->class = isym
.n_sclass
;
1542 /* Pick up the aux entry, which points to the end of the tag
1544 bfd_coff_swap_aux_in (input_bfd
, (PTR
) (esym
+ isymesz
),
1545 isym
.n_type
, isym
.n_sclass
, 0, isym
.n_numaux
,
1548 /* Gather the elements. */
1549 epp
= &mt
->elements
;
1550 mt
->elements
= NULL
;
1552 esl
= esym
+ 2 * isymesz
;
1553 eslend
= ((bfd_byte
*) obj_coff_external_syms (input_bfd
)
1554 + aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
* isymesz
);
1555 while (esl
< eslend
)
1557 const char *elename
;
1558 char elebuf
[SYMNMLEN
+ 1];
1561 bfd_coff_swap_sym_in (input_bfd
, (PTR
) esl
, (PTR
) islp
);
1563 *epp
= ((struct coff_debug_merge_element
*)
1564 bfd_alloc (input_bfd
,
1565 sizeof (struct coff_debug_merge_element
)));
1569 elename
= _bfd_coff_internal_syment_name (input_bfd
, islp
,
1571 if (elename
== NULL
)
1574 name_copy
= (char *) bfd_alloc (input_bfd
,
1575 strlen (elename
) + 1);
1576 if (name_copy
== NULL
)
1578 strcpy (name_copy
, elename
);
1580 (*epp
)->name
= name_copy
;
1581 (*epp
)->type
= islp
->n_type
;
1583 if (islp
->n_numaux
>= 1
1584 && islp
->n_type
!= T_NULL
1585 && islp
->n_sclass
!= C_EOS
)
1587 union internal_auxent eleaux
;
1590 bfd_coff_swap_aux_in (input_bfd
, (PTR
) (esl
+ isymesz
),
1591 islp
->n_type
, islp
->n_sclass
, 0,
1592 islp
->n_numaux
, (PTR
) &eleaux
);
1593 indx
= eleaux
.x_sym
.x_tagndx
.l
;
1595 /* FIXME: If this tagndx entry refers to a symbol
1596 defined later in this file, we just ignore it.
1597 Handling this correctly would be tedious, and may
1603 (bfd_byte
*) obj_coff_external_syms (input_bfd
))
1606 (*epp
)->tagndx
= finfo
->sym_indices
[indx
];
1607 if ((*epp
)->tagndx
< 0)
1611 epp
= &(*epp
)->next
;
1614 esl
+= (islp
->n_numaux
+ 1) * isymesz
;
1615 islp
+= islp
->n_numaux
+ 1;
1618 /* See if we already have a definition which matches this
1619 type. We always output the type if it has no elements,
1621 if (mt
->elements
== NULL
)
1622 bfd_release (input_bfd
, (PTR
) mt
);
1625 struct coff_debug_merge_type
*mtl
;
1627 for (mtl
= mh
->types
; mtl
!= NULL
; mtl
= mtl
->next
)
1629 struct coff_debug_merge_element
*me
, *mel
;
1631 if (mtl
->class != mt
->class)
1634 for (me
= mt
->elements
, mel
= mtl
->elements
;
1635 me
!= NULL
&& mel
!= NULL
;
1636 me
= me
->next
, mel
= mel
->next
)
1638 if (strcmp (me
->name
, mel
->name
) != 0
1639 || me
->type
!= mel
->type
1640 || me
->tagndx
!= mel
->tagndx
)
1644 if (me
== NULL
&& mel
== NULL
)
1648 if (mtl
== NULL
|| (bfd_size_type
) mtl
->indx
>= syment_base
)
1650 /* This is the first definition of this type. */
1651 mt
->indx
= output_index
;
1652 mt
->next
= mh
->types
;
1657 /* This is a redefinition which can be merged. */
1658 bfd_release (input_bfd
, (PTR
) mt
);
1659 *indexp
= mtl
->indx
;
1660 add
= (eslend
- esym
) / isymesz
;
1666 /* We now know whether we are to skip this symbol or not. */
1669 /* Adjust the symbol in order to output it. */
1671 if (isym
._n
._n_n
._n_zeroes
== 0
1672 && isym
._n
._n_n
._n_offset
!= 0)
1677 /* This symbol has a long name. Enter it in the string
1678 table we are building. Note that we do not check
1679 bfd_coff_symname_in_debug. That is only true for
1680 XCOFF, and XCOFF requires different linking code
1682 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
,
1686 indx
= _bfd_stringtab_add (finfo
->strtab
, name
, hash
, copy
);
1687 if (indx
== (bfd_size_type
) -1)
1689 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
1692 if (isym
.n_scnum
> 0)
1694 isym
.n_scnum
= (*secpp
)->output_section
->target_index
;
1695 isym
.n_value
+= (*secpp
)->output_offset
;
1696 if (! obj_pe (input_bfd
))
1697 isym
.n_value
-= (*secpp
)->vma
;
1698 if (! obj_pe (finfo
->output_bfd
))
1699 isym
.n_value
+= (*secpp
)->output_section
->vma
;
1702 /* The value of a C_FILE symbol is the symbol index of the
1703 next C_FILE symbol. The value of the last C_FILE symbol
1704 is the symbol index to the first external symbol
1705 (actually, coff_renumber_symbols does not get this
1706 right--it just sets the value of the last C_FILE symbol
1707 to zero--and nobody has ever complained about it). We
1708 try to get this right, below, just before we write the
1709 symbols out, but in the general case we may have to write
1710 the symbol out twice. */
1711 if (isym
.n_sclass
== C_FILE
)
1713 if (finfo
->last_file_index
!= -1
1714 && finfo
->last_file
.n_value
!= (long) output_index
)
1716 /* We must correct the value of the last C_FILE entry. */
1717 finfo
->last_file
.n_value
= output_index
;
1718 if ((bfd_size_type
) finfo
->last_file_index
>= syment_base
)
1720 /* The last C_FILE symbol is in this input file. */
1721 bfd_coff_swap_sym_out (output_bfd
,
1722 (PTR
) &finfo
->last_file
,
1723 (PTR
) (finfo
->outsyms
1724 + ((finfo
->last_file_index
1730 /* We have already written out the last C_FILE
1731 symbol. We need to write it out again. We
1732 borrow *outsym temporarily. */
1733 bfd_coff_swap_sym_out (output_bfd
,
1734 (PTR
) &finfo
->last_file
,
1736 if (bfd_seek (output_bfd
,
1737 (obj_sym_filepos (output_bfd
)
1738 + finfo
->last_file_index
* osymesz
),
1740 || (bfd_write (outsym
, osymesz
, 1, output_bfd
)
1746 finfo
->last_file_index
= output_index
;
1747 finfo
->last_file
= isym
;
1750 /* If doing task linking, convert normal global function symbols to
1751 static functions. */
1753 if (finfo
->info
->task_link
1754 && (isym
.n_sclass
== C_EXT
1755 || isym
.n_sclass
== C_WEAKEXT
1756 || (obj_pe (input_bfd
) && isym
.n_sclass
== C_NT_WEAK
)))
1757 isym
.n_sclass
= C_STAT
;
1759 /* Output the symbol. */
1761 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
, (PTR
) outsym
);
1763 *indexp
= output_index
;
1768 struct coff_link_hash_entry
*h
;
1770 indx
= ((esym
- (bfd_byte
*) obj_coff_external_syms (input_bfd
))
1772 h
= obj_coff_sym_hashes (input_bfd
)[indx
];
1775 /* This can happen if there were errors earlier in
1777 bfd_set_error (bfd_error_bad_value
);
1780 h
->indx
= output_index
;
1783 output_index
+= add
;
1784 outsym
+= add
* osymesz
;
1787 esym
+= add
* isymesz
;
1791 for (--add
; add
> 0; --add
)
1798 /* Fix up the aux entries. This must be done in a separate pass,
1799 because we don't know the correct symbol indices until we have
1800 already decided which symbols we are going to keep. */
1802 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
1803 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
1804 isymp
= finfo
->internal_syms
;
1805 indexp
= finfo
->sym_indices
;
1806 sym_hash
= obj_coff_sym_hashes (input_bfd
);
1807 outsym
= finfo
->outsyms
;
1808 while (esym
< esym_end
)
1812 add
= 1 + isymp
->n_numaux
;
1815 || (bfd_size_type
) *indexp
< syment_base
)
1816 && (*sym_hash
== NULL
1817 || (*sym_hash
)->auxbfd
!= input_bfd
))
1818 esym
+= add
* isymesz
;
1821 struct coff_link_hash_entry
*h
;
1829 /* The m68k-motorola-sysv assembler will sometimes
1830 generate two symbols with the same name, but only one
1831 will have aux entries. */
1832 BFD_ASSERT (isymp
->n_numaux
== 0
1833 || h
->numaux
== isymp
->n_numaux
);
1841 /* Handle the aux entries. This handling is based on
1842 coff_pointerize_aux. I don't know if it always correct. */
1843 for (i
= 0; i
< isymp
->n_numaux
&& esym
< esym_end
; i
++)
1845 union internal_auxent aux
;
1846 union internal_auxent
*auxp
;
1852 bfd_coff_swap_aux_in (input_bfd
, (PTR
) esym
, isymp
->n_type
,
1853 isymp
->n_sclass
, i
, isymp
->n_numaux
,
1858 if (isymp
->n_sclass
== C_FILE
)
1860 /* If this is a long filename, we must put it in the
1862 if (auxp
->x_file
.x_n
.x_zeroes
== 0
1863 && auxp
->x_file
.x_n
.x_offset
!= 0)
1865 const char *filename
;
1868 BFD_ASSERT (auxp
->x_file
.x_n
.x_offset
1869 >= STRING_SIZE_SIZE
);
1870 if (strings
== NULL
)
1872 strings
= _bfd_coff_read_string_table (input_bfd
);
1873 if (strings
== NULL
)
1876 filename
= strings
+ auxp
->x_file
.x_n
.x_offset
;
1877 indx
= _bfd_stringtab_add (finfo
->strtab
, filename
,
1879 if (indx
== (bfd_size_type
) -1)
1881 auxp
->x_file
.x_n
.x_offset
= STRING_SIZE_SIZE
+ indx
;
1884 else if (isymp
->n_sclass
!= C_STAT
|| isymp
->n_type
!= T_NULL
)
1888 if (ISFCN (isymp
->n_type
)
1889 || ISTAG (isymp
->n_sclass
)
1890 || isymp
->n_sclass
== C_BLOCK
1891 || isymp
->n_sclass
== C_FCN
)
1893 indx
= auxp
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
;
1895 && indx
< obj_raw_syment_count (input_bfd
))
1897 /* We look forward through the symbol for
1898 the index of the next symbol we are going
1899 to include. I don't know if this is
1901 while ((finfo
->sym_indices
[indx
] < 0
1902 || ((bfd_size_type
) finfo
->sym_indices
[indx
]
1904 && indx
< obj_raw_syment_count (input_bfd
))
1906 if (indx
>= obj_raw_syment_count (input_bfd
))
1907 indx
= output_index
;
1909 indx
= finfo
->sym_indices
[indx
];
1910 auxp
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
= indx
;
1914 indx
= auxp
->x_sym
.x_tagndx
.l
;
1915 if (indx
> 0 && indx
< obj_raw_syment_count (input_bfd
))
1919 symindx
= finfo
->sym_indices
[indx
];
1921 auxp
->x_sym
.x_tagndx
.l
= 0;
1923 auxp
->x_sym
.x_tagndx
.l
= symindx
;
1926 /* The .bf symbols are supposed to be linked through
1927 the endndx field. We need to carry this list
1928 across object files. */
1931 && isymp
->n_sclass
== C_FCN
1932 && (isymp
->_n
._n_n
._n_zeroes
!= 0
1933 || isymp
->_n
._n_n
._n_offset
== 0)
1934 && isymp
->_n
._n_name
[0] == '.'
1935 && isymp
->_n
._n_name
[1] == 'b'
1936 && isymp
->_n
._n_name
[2] == 'f'
1937 && isymp
->_n
._n_name
[3] == '\0')
1939 if (finfo
->last_bf_index
!= -1)
1941 finfo
->last_bf
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
=
1944 if ((bfd_size_type
) finfo
->last_bf_index
1949 /* The last .bf symbol is in this input
1950 file. This will only happen if the
1951 assembler did not set up the .bf
1952 endndx symbols correctly. */
1953 auxout
= (PTR
) (finfo
->outsyms
1954 + ((finfo
->last_bf_index
1957 bfd_coff_swap_aux_out (output_bfd
,
1958 (PTR
) &finfo
->last_bf
,
1966 /* We have already written out the last
1967 .bf aux entry. We need to write it
1968 out again. We borrow *outsym
1969 temporarily. FIXME: This case should
1971 bfd_coff_swap_aux_out (output_bfd
,
1972 (PTR
) &finfo
->last_bf
,
1977 if (bfd_seek (output_bfd
,
1978 (obj_sym_filepos (output_bfd
)
1979 + finfo
->last_bf_index
* osymesz
),
1981 || bfd_write (outsym
, osymesz
, 1,
1982 output_bfd
) != osymesz
)
1987 if (auxp
->x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
!= 0)
1988 finfo
->last_bf_index
= -1;
1991 /* The endndx field of this aux entry must
1992 be updated with the symbol number of the
1994 finfo
->last_bf
= *auxp
;
1995 finfo
->last_bf_index
= (((outsym
- finfo
->outsyms
)
2004 bfd_coff_swap_aux_out (output_bfd
, (PTR
) auxp
, isymp
->n_type
,
2005 isymp
->n_sclass
, i
, isymp
->n_numaux
,
2019 /* Relocate the line numbers, unless we are stripping them. */
2020 if (finfo
->info
->strip
== strip_none
2021 || finfo
->info
->strip
== strip_some
)
2023 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
2031 /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2032 build_link_order in ldwrite.c will not have created a
2033 link order, which means that we will not have seen this
2034 input section in _bfd_coff_final_link, which means that
2035 we will not have allocated space for the line numbers of
2036 this section. I don't think line numbers can be
2037 meaningful for a section which does not have
2038 SEC_HAS_CONTENTS set, but, if they do, this must be
2040 if (o
->lineno_count
== 0
2041 || (o
->output_section
->flags
& SEC_HAS_CONTENTS
) == 0)
2044 if (bfd_seek (input_bfd
, o
->line_filepos
, SEEK_SET
) != 0
2045 || bfd_read (finfo
->linenos
, linesz
, o
->lineno_count
,
2046 input_bfd
) != linesz
* o
->lineno_count
)
2049 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
2050 eline
= finfo
->linenos
;
2051 oeline
= finfo
->linenos
;
2052 elineend
= eline
+ linesz
* o
->lineno_count
;
2054 for (; eline
< elineend
; eline
+= linesz
)
2056 struct internal_lineno iline
;
2058 bfd_coff_swap_lineno_in (input_bfd
, (PTR
) eline
, (PTR
) &iline
);
2060 if (iline
.l_lnno
!= 0)
2061 iline
.l_addr
.l_paddr
+= offset
;
2062 else if (iline
.l_addr
.l_symndx
>= 0
2063 && ((unsigned long) iline
.l_addr
.l_symndx
2064 < obj_raw_syment_count (input_bfd
)))
2068 indx
= finfo
->sym_indices
[iline
.l_addr
.l_symndx
];
2072 /* These line numbers are attached to a symbol
2073 which we are stripping. We must discard the
2074 line numbers because reading them back with
2075 no associated symbol (or associating them all
2076 with symbol #0) will fail. We can't regain
2077 the space in the output file, but at least
2083 struct internal_syment is
;
2084 union internal_auxent ia
;
2086 /* Fix up the lnnoptr field in the aux entry of
2087 the symbol. It turns out that we can't do
2088 this when we modify the symbol aux entries,
2089 because gas sometimes screws up the lnnoptr
2090 field and makes it an offset from the start
2091 of the line numbers rather than an absolute
2093 bfd_coff_swap_sym_in (output_bfd
,
2094 (PTR
) (finfo
->outsyms
2095 + ((indx
- syment_base
)
2098 if ((ISFCN (is
.n_type
)
2099 || is
.n_sclass
== C_BLOCK
)
2100 && is
.n_numaux
>= 1)
2104 auxptr
= (PTR
) (finfo
->outsyms
2105 + ((indx
- syment_base
+ 1)
2107 bfd_coff_swap_aux_in (output_bfd
, auxptr
,
2108 is
.n_type
, is
.n_sclass
,
2109 0, is
.n_numaux
, (PTR
) &ia
);
2110 ia
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
=
2111 (o
->output_section
->line_filepos
2112 + o
->output_section
->lineno_count
* linesz
2113 + eline
- finfo
->linenos
);
2114 bfd_coff_swap_aux_out (output_bfd
, (PTR
) &ia
,
2115 is
.n_type
, is
.n_sclass
, 0,
2116 is
.n_numaux
, auxptr
);
2122 iline
.l_addr
.l_symndx
= indx
;
2127 bfd_coff_swap_lineno_out (output_bfd
, (PTR
) &iline
,
2133 if (bfd_seek (output_bfd
,
2134 (o
->output_section
->line_filepos
2135 + o
->output_section
->lineno_count
* linesz
),
2137 || (bfd_write (finfo
->linenos
, 1, oeline
- finfo
->linenos
,
2139 != (bfd_size_type
) (oeline
- finfo
->linenos
)))
2142 o
->output_section
->lineno_count
+=
2143 (oeline
- finfo
->linenos
) / linesz
;
2147 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2148 symbol will be the first symbol in the next input file. In the
2149 normal case, this will save us from writing out the C_FILE symbol
2151 if (finfo
->last_file_index
!= -1
2152 && (bfd_size_type
) finfo
->last_file_index
>= syment_base
)
2154 finfo
->last_file
.n_value
= output_index
;
2155 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &finfo
->last_file
,
2156 (PTR
) (finfo
->outsyms
2157 + ((finfo
->last_file_index
- syment_base
)
2161 /* Write the modified symbols to the output file. */
2162 if (outsym
> finfo
->outsyms
)
2164 if (bfd_seek (output_bfd
,
2165 obj_sym_filepos (output_bfd
) + syment_base
* osymesz
,
2167 || (bfd_write (finfo
->outsyms
, outsym
- finfo
->outsyms
, 1,
2169 != (bfd_size_type
) (outsym
- finfo
->outsyms
)))
2172 BFD_ASSERT ((obj_raw_syment_count (output_bfd
)
2173 + (outsym
- finfo
->outsyms
) / osymesz
)
2176 obj_raw_syment_count (output_bfd
) = output_index
;
2179 /* Relocate the contents of each section. */
2180 adjust_symndx
= coff_backend_info (input_bfd
)->_bfd_coff_adjust_symndx
;
2181 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
2184 struct coff_section_tdata
*secdata
;
2186 if (! o
->linker_mark
)
2188 /* This section was omitted from the link. */
2192 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
2193 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
2195 if ((o
->flags
& SEC_RELOC
) != 0
2196 && o
->reloc_count
!= 0)
2198 ((*_bfd_error_handler
)
2199 (_("%s: relocs in section `%s', but it has no contents"),
2200 bfd_get_filename (input_bfd
),
2201 bfd_get_section_name (input_bfd
, o
)));
2202 bfd_set_error (bfd_error_no_contents
);
2209 secdata
= coff_section_data (input_bfd
, o
);
2210 if (secdata
!= NULL
&& secdata
->contents
!= NULL
)
2211 contents
= secdata
->contents
;
2214 if (! bfd_get_section_contents (input_bfd
, o
, finfo
->contents
,
2215 (file_ptr
) 0, o
->_raw_size
))
2217 contents
= finfo
->contents
;
2220 if ((o
->flags
& SEC_RELOC
) != 0)
2223 struct internal_reloc
*internal_relocs
;
2224 struct internal_reloc
*irel
;
2226 /* Read in the relocs. */
2227 target_index
= o
->output_section
->target_index
;
2228 internal_relocs
= (_bfd_coff_read_internal_relocs
2229 (input_bfd
, o
, false, finfo
->external_relocs
,
2230 finfo
->info
->relocateable
,
2231 (finfo
->info
->relocateable
2232 ? (finfo
->section_info
[target_index
].relocs
2233 + o
->output_section
->reloc_count
)
2234 : finfo
->internal_relocs
)));
2235 if (internal_relocs
== NULL
)
2238 /* Call processor specific code to relocate the section
2240 if (! bfd_coff_relocate_section (output_bfd
, finfo
->info
,
2244 finfo
->internal_syms
,
2248 if (finfo
->info
->relocateable
)
2251 struct internal_reloc
*irelend
;
2252 struct coff_link_hash_entry
**rel_hash
;
2254 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
2255 irel
= internal_relocs
;
2256 irelend
= irel
+ o
->reloc_count
;
2257 rel_hash
= (finfo
->section_info
[target_index
].rel_hashes
2258 + o
->output_section
->reloc_count
);
2259 for (; irel
< irelend
; irel
++, rel_hash
++)
2261 struct coff_link_hash_entry
*h
;
2266 /* Adjust the reloc address and symbol index. */
2268 irel
->r_vaddr
+= offset
;
2270 if (irel
->r_symndx
== -1)
2275 if (! (*adjust_symndx
) (output_bfd
, finfo
->info
,
2283 h
= obj_coff_sym_hashes (input_bfd
)[irel
->r_symndx
];
2286 /* This is a global symbol. */
2288 irel
->r_symndx
= h
->indx
;
2291 /* This symbol is being written at the end
2292 of the file, and we do not yet know the
2293 symbol index. We save the pointer to the
2294 hash table entry in the rel_hash list.
2295 We set the indx field to -2 to indicate
2296 that this symbol must not be stripped. */
2305 indx
= finfo
->sym_indices
[irel
->r_symndx
];
2307 irel
->r_symndx
= indx
;
2310 struct internal_syment
*is
;
2312 char buf
[SYMNMLEN
+ 1];
2314 /* This reloc is against a symbol we are
2315 stripping. This should have been handled
2316 by the 'dont_skip_symbol' code in the while
2317 loop at the top of this function. */
2319 is
= finfo
->internal_syms
+ irel
->r_symndx
;
2321 name
= (_bfd_coff_internal_syment_name
2322 (input_bfd
, is
, buf
));
2326 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
2327 (finfo
->info
, name
, input_bfd
, o
,
2334 o
->output_section
->reloc_count
+= o
->reloc_count
;
2338 /* Write out the modified section contents. */
2339 if (secdata
== NULL
|| secdata
->stab_info
== NULL
)
2341 if (! bfd_set_section_contents (output_bfd
, o
->output_section
,
2342 contents
, o
->output_offset
,
2343 (o
->_cooked_size
!= 0
2350 if (! (_bfd_write_section_stabs
2351 (output_bfd
, &coff_hash_table (finfo
->info
)->stab_info
,
2352 o
, &secdata
->stab_info
, contents
)))
2357 if (! finfo
->info
->keep_memory
)
2359 if (! _bfd_coff_free_symbols (input_bfd
))
2366 /* Write out a global symbol. Called via coff_link_hash_traverse. */
2369 _bfd_coff_write_global_sym (h
, data
)
2370 struct coff_link_hash_entry
*h
;
2373 struct coff_final_link_info
*finfo
= (struct coff_final_link_info
*) data
;
2375 struct internal_syment isym
;
2376 bfd_size_type symesz
;
2379 output_bfd
= finfo
->output_bfd
;
2385 && (finfo
->info
->strip
== strip_all
2386 || (finfo
->info
->strip
== strip_some
2387 && (bfd_hash_lookup (finfo
->info
->keep_hash
,
2388 h
->root
.root
.string
, false, false)
2392 switch (h
->root
.type
)
2395 case bfd_link_hash_new
:
2399 case bfd_link_hash_undefined
:
2400 case bfd_link_hash_undefweak
:
2401 isym
.n_scnum
= N_UNDEF
;
2405 case bfd_link_hash_defined
:
2406 case bfd_link_hash_defweak
:
2410 sec
= h
->root
.u
.def
.section
->output_section
;
2411 if (bfd_is_abs_section (sec
))
2412 isym
.n_scnum
= N_ABS
;
2414 isym
.n_scnum
= sec
->target_index
;
2415 isym
.n_value
= (h
->root
.u
.def
.value
2416 + h
->root
.u
.def
.section
->output_offset
);
2417 if (! obj_pe (finfo
->output_bfd
))
2418 isym
.n_value
+= sec
->vma
;
2422 case bfd_link_hash_common
:
2423 isym
.n_scnum
= N_UNDEF
;
2424 isym
.n_value
= h
->root
.u
.c
.size
;
2427 case bfd_link_hash_indirect
:
2428 case bfd_link_hash_warning
:
2429 /* Just ignore these. They can't be handled anyhow. */
2433 if (strlen (h
->root
.root
.string
) <= SYMNMLEN
)
2434 strncpy (isym
._n
._n_name
, h
->root
.root
.string
, SYMNMLEN
);
2441 if ((output_bfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
2443 indx
= _bfd_stringtab_add (finfo
->strtab
, h
->root
.root
.string
, hash
,
2445 if (indx
== (bfd_size_type
) -1)
2447 finfo
->failed
= true;
2450 isym
._n
._n_n
._n_zeroes
= 0;
2451 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
2454 isym
.n_sclass
= h
->class;
2455 isym
.n_type
= h
->type
;
2457 if (isym
.n_sclass
== C_NULL
)
2458 isym
.n_sclass
= C_EXT
;
2460 /* If doing task linking and this is the pass where we convert
2461 defined globals to statics, then do that conversion now. If the
2462 symbol is not being converted, just ignore it and it will be
2463 output during a later pass. */
2464 if (finfo
->global_to_static
)
2466 if (isym
.n_sclass
!= C_EXT
2467 && isym
.n_sclass
!= C_WEAKEXT
2468 && (! obj_pe (output_bfd
) || isym
.n_sclass
!= C_NT_WEAK
))
2472 isym
.n_sclass
= C_STAT
;
2475 isym
.n_numaux
= h
->numaux
;
2477 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
, (PTR
) finfo
->outsyms
);
2479 symesz
= bfd_coff_symesz (output_bfd
);
2481 if (bfd_seek (output_bfd
,
2482 (obj_sym_filepos (output_bfd
)
2483 + obj_raw_syment_count (output_bfd
) * symesz
),
2485 || bfd_write (finfo
->outsyms
, symesz
, 1, output_bfd
) != symesz
)
2487 finfo
->failed
= true;
2491 h
->indx
= obj_raw_syment_count (output_bfd
);
2493 ++obj_raw_syment_count (output_bfd
);
2495 /* Write out any associated aux entries. Most of the aux entries
2496 will have been modified in _bfd_coff_link_input_bfd. We have to
2497 handle section aux entries here, now that we have the final
2498 relocation and line number counts. */
2499 for (i
= 0; i
< isym
.n_numaux
; i
++)
2501 union internal_auxent
*auxp
;
2505 /* Look for a section aux entry here using the same tests that
2506 coff_swap_aux_out uses. */
2508 && (isym
.n_sclass
== C_STAT
2509 || isym
.n_sclass
== C_HIDDEN
)
2510 && isym
.n_type
== T_NULL
2511 && (h
->root
.type
== bfd_link_hash_defined
2512 || h
->root
.type
== bfd_link_hash_defweak
))
2516 sec
= h
->root
.u
.def
.section
->output_section
;
2519 auxp
->x_scn
.x_scnlen
= (sec
->_cooked_size
!= 0
2523 /* For PE, an overflow on the final link reportedly does
2524 not matter. FIXME: Why not? */
2526 if (sec
->reloc_count
> 0xffff
2527 && (! obj_pe (output_bfd
)
2528 || finfo
->info
->relocateable
))
2529 (*_bfd_error_handler
)
2530 (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2531 bfd_get_filename (output_bfd
),
2532 bfd_get_section_name (output_bfd
, sec
),
2535 if (sec
->lineno_count
> 0xffff
2536 && (! obj_pe (output_bfd
)
2537 || finfo
->info
->relocateable
))
2538 (*_bfd_error_handler
)
2539 (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2540 bfd_get_filename (output_bfd
),
2541 bfd_get_section_name (output_bfd
, sec
),
2544 auxp
->x_scn
.x_nreloc
= sec
->reloc_count
;
2545 auxp
->x_scn
.x_nlinno
= sec
->lineno_count
;
2546 auxp
->x_scn
.x_checksum
= 0;
2547 auxp
->x_scn
.x_associated
= 0;
2548 auxp
->x_scn
.x_comdat
= 0;
2552 bfd_coff_swap_aux_out (output_bfd
, (PTR
) auxp
, isym
.n_type
,
2553 isym
.n_sclass
, i
, isym
.n_numaux
,
2554 (PTR
) finfo
->outsyms
);
2555 if (bfd_write (finfo
->outsyms
, symesz
, 1, output_bfd
) != symesz
)
2557 finfo
->failed
= true;
2560 ++obj_raw_syment_count (output_bfd
);
2566 /* Write out task global symbols, converting them to statics. Called
2567 via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2568 the dirty work, if the symbol we are processing needs conversion. */
2571 _bfd_coff_write_task_globals (h
, data
)
2572 struct coff_link_hash_entry
*h
;
2575 struct coff_final_link_info
*finfo
= (struct coff_final_link_info
*) data
;
2576 boolean rtnval
= true;
2577 boolean save_global_to_static
;
2581 switch (h
->root
.type
)
2583 case bfd_link_hash_defined
:
2584 case bfd_link_hash_defweak
:
2585 save_global_to_static
= finfo
->global_to_static
;
2586 finfo
->global_to_static
= true;
2587 rtnval
= _bfd_coff_write_global_sym (h
, data
);
2588 finfo
->global_to_static
= save_global_to_static
;
2597 /* Handle a link order which is supposed to generate a reloc. */
2600 _bfd_coff_reloc_link_order (output_bfd
, finfo
, output_section
, link_order
)
2602 struct coff_final_link_info
*finfo
;
2603 asection
*output_section
;
2604 struct bfd_link_order
*link_order
;
2606 reloc_howto_type
*howto
;
2607 struct internal_reloc
*irel
;
2608 struct coff_link_hash_entry
**rel_hash_ptr
;
2610 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
2613 bfd_set_error (bfd_error_bad_value
);
2617 if (link_order
->u
.reloc
.p
->addend
!= 0)
2621 bfd_reloc_status_type rstat
;
2624 size
= bfd_get_reloc_size (howto
);
2625 buf
= (bfd_byte
*) bfd_zmalloc (size
);
2629 rstat
= _bfd_relocate_contents (howto
, output_bfd
,
2630 link_order
->u
.reloc
.p
->addend
, buf
);
2636 case bfd_reloc_outofrange
:
2638 case bfd_reloc_overflow
:
2639 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
2641 (link_order
->type
== bfd_section_reloc_link_order
2642 ? bfd_section_name (output_bfd
,
2643 link_order
->u
.reloc
.p
->u
.section
)
2644 : link_order
->u
.reloc
.p
->u
.name
),
2645 howto
->name
, link_order
->u
.reloc
.p
->addend
,
2646 (bfd
*) NULL
, (asection
*) NULL
, (bfd_vma
) 0)))
2653 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
2654 (file_ptr
) link_order
->offset
, size
);
2660 /* Store the reloc information in the right place. It will get
2661 swapped and written out at the end of the final_link routine. */
2663 irel
= (finfo
->section_info
[output_section
->target_index
].relocs
2664 + output_section
->reloc_count
);
2665 rel_hash_ptr
= (finfo
->section_info
[output_section
->target_index
].rel_hashes
2666 + output_section
->reloc_count
);
2668 memset (irel
, 0, sizeof (struct internal_reloc
));
2669 *rel_hash_ptr
= NULL
;
2671 irel
->r_vaddr
= output_section
->vma
+ link_order
->offset
;
2673 if (link_order
->type
== bfd_section_reloc_link_order
)
2675 /* We need to somehow locate a symbol in the right section. The
2676 symbol must either have a value of zero, or we must adjust
2677 the addend by the value of the symbol. FIXME: Write this
2678 when we need it. The old linker couldn't handle this anyhow. */
2680 *rel_hash_ptr
= NULL
;
2685 struct coff_link_hash_entry
*h
;
2687 h
= ((struct coff_link_hash_entry
*)
2688 bfd_wrapped_link_hash_lookup (output_bfd
, finfo
->info
,
2689 link_order
->u
.reloc
.p
->u
.name
,
2690 false, false, true));
2694 irel
->r_symndx
= h
->indx
;
2697 /* Set the index to -2 to force this symbol to get
2706 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
2707 (finfo
->info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
2708 (asection
*) NULL
, (bfd_vma
) 0)))
2714 /* FIXME: Is this always right? */
2715 irel
->r_type
= howto
->type
;
2717 /* r_size is only used on the RS/6000, which needs its own linker
2718 routines anyhow. r_extern is only used for ECOFF. */
2720 /* FIXME: What is the right value for r_offset? Is zero OK? */
2722 ++output_section
->reloc_count
;
2727 /* A basic reloc handling routine which may be used by processors with
2731 _bfd_coff_generic_relocate_section (output_bfd
, info
, input_bfd
,
2732 input_section
, contents
, relocs
, syms
,
2735 struct bfd_link_info
*info
;
2737 asection
*input_section
;
2739 struct internal_reloc
*relocs
;
2740 struct internal_syment
*syms
;
2741 asection
**sections
;
2743 struct internal_reloc
*rel
;
2744 struct internal_reloc
*relend
;
2747 relend
= rel
+ input_section
->reloc_count
;
2748 for (; rel
< relend
; rel
++)
2751 struct coff_link_hash_entry
*h
;
2752 struct internal_syment
*sym
;
2755 reloc_howto_type
*howto
;
2756 bfd_reloc_status_type rstat
;
2758 symndx
= rel
->r_symndx
;
2766 || (unsigned long) symndx
>= obj_raw_syment_count (input_bfd
))
2768 (*_bfd_error_handler
)
2769 ("%s: illegal symbol index %ld in relocs",
2770 bfd_get_filename (input_bfd
), symndx
);
2775 h
= obj_coff_sym_hashes (input_bfd
)[symndx
];
2776 sym
= syms
+ symndx
;
2779 /* COFF treats common symbols in one of two ways. Either the
2780 size of the symbol is included in the section contents, or it
2781 is not. We assume that the size is not included, and force
2782 the rtype_to_howto function to adjust the addend as needed. */
2784 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
2785 addend
= - sym
->n_value
;
2790 howto
= bfd_coff_rtype_to_howto (input_bfd
, input_section
, rel
, h
,
2795 /* If we are doing a relocateable link, then we can just ignore
2796 a PC relative reloc that is pcrel_offset. It will already
2797 have the correct value. If this is not a relocateable link,
2798 then we should ignore the symbol value. */
2799 if (howto
->pc_relative
&& howto
->pcrel_offset
)
2801 if (info
->relocateable
)
2803 if (sym
!= NULL
&& sym
->n_scnum
!= 0)
2804 addend
+= sym
->n_value
;
2815 sec
= bfd_abs_section_ptr
;
2820 sec
= sections
[symndx
];
2821 val
= (sec
->output_section
->vma
2822 + sec
->output_offset
2824 if (! obj_pe (input_bfd
))
2830 if (h
->root
.type
== bfd_link_hash_defined
2831 || h
->root
.type
== bfd_link_hash_defweak
)
2835 sec
= h
->root
.u
.def
.section
;
2836 val
= (h
->root
.u
.def
.value
2837 + sec
->output_section
->vma
2838 + sec
->output_offset
);
2841 else if (! info
->relocateable
)
2843 if (! ((*info
->callbacks
->undefined_symbol
)
2844 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
2845 rel
->r_vaddr
- input_section
->vma
)))
2850 if (info
->base_file
)
2852 /* Emit a reloc if the backend thinks it needs it. */
2853 if (sym
&& pe_data (output_bfd
)->in_reloc_p (output_bfd
, howto
))
2855 /* Relocation to a symbol in a section which isn't
2856 absolute. We output the address here to a file.
2857 This file is then read by dlltool when generating the
2858 reloc section. Note that the base file is not
2859 portable between systems. We write out a long here,
2860 and dlltool reads in a long. */
2861 long addr
= (rel
->r_vaddr
2862 - input_section
->vma
2863 + input_section
->output_offset
2864 + input_section
->output_section
->vma
);
2865 if (coff_data (output_bfd
)->pe
)
2866 addr
-= pe_data(output_bfd
)->pe_opthdr
.ImageBase
;
2867 if (fwrite (&addr
, 1, sizeof (long), (FILE *) info
->base_file
)
2870 bfd_set_error (bfd_error_system_call
);
2876 rstat
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2878 rel
->r_vaddr
- input_section
->vma
,
2887 case bfd_reloc_outofrange
:
2888 (*_bfd_error_handler
)
2889 (_("%s: bad reloc address 0x%lx in section `%s'"),
2890 bfd_get_filename (input_bfd
),
2891 (unsigned long) rel
->r_vaddr
,
2892 bfd_get_section_name (input_bfd
, input_section
));
2894 case bfd_reloc_overflow
:
2897 char buf
[SYMNMLEN
+ 1];
2902 name
= h
->root
.root
.string
;
2905 name
= _bfd_coff_internal_syment_name (input_bfd
, sym
, buf
);
2910 if (! ((*info
->callbacks
->reloc_overflow
)
2911 (info
, name
, howto
->name
, (bfd_vma
) 0, input_bfd
,
2912 input_section
, rel
->r_vaddr
- input_section
->vma
)))