1 /* POWER/PowerPC XCOFF linker support.
2 Copyright (C) 1995-2020 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor <ian@cygnus.com>, 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "coff/internal.h"
27 #include "coff/xcoff.h"
30 #include "libiberty.h"
31 #include "xcofflink.h"
33 /* This file holds the XCOFF linker code. */
35 #undef STRING_SIZE_SIZE
36 #define STRING_SIZE_SIZE 4
38 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
39 This flag will only be used on input sections. */
41 #define SEC_MARK (SEC_ROM)
43 /* The list of import files. */
45 struct xcoff_import_file
47 /* The next entry in the list. */
48 struct xcoff_import_file
*next
;
53 /* The member name. */
57 /* Information we keep for each section in the output file during the
60 struct xcoff_link_section_info
62 /* The relocs to be output. */
63 struct internal_reloc
*relocs
;
64 /* For each reloc against a global symbol whose index was not known
65 when the reloc was handled, the global hash table entry. */
66 struct xcoff_link_hash_entry
**rel_hashes
;
67 /* If there is a TOC relative reloc against a global symbol, and the
68 index of the TOC symbol is not known when the reloc was handled,
69 an entry is added to this linked list. This is not an array,
70 like rel_hashes, because this case is quite uncommon. */
71 struct xcoff_toc_rel_hash
73 struct xcoff_toc_rel_hash
*next
;
74 struct xcoff_link_hash_entry
*h
;
75 struct internal_reloc
*rel
;
79 /* Information that the XCOFF linker collects about an archive. */
80 struct xcoff_archive_info
82 /* The archive described by this entry. */
85 /* The import path and import filename to use when referring to
86 this archive in the .loader section. */
90 /* True if the archive contains a dynamic object. */
91 unsigned int contains_shared_object_p
: 1;
93 /* True if the previous field is valid. */
94 unsigned int know_contains_shared_object_p
: 1;
97 struct xcoff_link_hash_table
99 struct bfd_link_hash_table root
;
101 /* The .debug string hash table. We need to compute this while
102 reading the input files, so that we know how large the .debug
103 section will be before we assign section positions. */
104 struct bfd_strtab_hash
*debug_strtab
;
106 /* The .debug section we will use for the final output. */
107 asection
*debug_section
;
109 /* The .loader section we will use for the final output. */
110 asection
*loader_section
;
112 /* A count of non TOC relative relocs which will need to be
113 allocated in the .loader section. */
116 /* The .loader section header. */
117 struct internal_ldhdr ldhdr
;
119 /* The .gl section we use to hold global linkage code. */
120 asection
*linkage_section
;
122 /* The .tc section we use to hold toc entries we build for global
124 asection
*toc_section
;
126 /* The .ds section we use to hold function descriptors which we
127 create for exported symbols. */
128 asection
*descriptor_section
;
130 /* The list of import files. */
131 struct xcoff_import_file
*imports
;
133 /* Required alignment of sections within the output file. */
134 unsigned long file_align
;
136 /* Whether the .text section must be read-only. */
139 /* Whether -brtl was specified. */
142 /* Whether garbage collection was done. */
145 /* A linked list of symbols for which we have size information. */
146 struct xcoff_link_size_list
148 struct xcoff_link_size_list
*next
;
149 struct xcoff_link_hash_entry
*h
;
154 /* Information about archives. */
157 /* Magic sections: _text, _etext, _data, _edata, _end, end. */
158 asection
*special_sections
[XCOFF_NUMBER_OF_SPECIAL_SECTIONS
];
161 /* Information that we pass around while doing the final link step. */
163 struct xcoff_final_link_info
165 /* General link information. */
166 struct bfd_link_info
*info
;
169 /* Hash table for long symbol names. */
170 struct bfd_strtab_hash
*strtab
;
171 /* Array of information kept for each output section, indexed by the
172 target_index field. */
173 struct xcoff_link_section_info
*section_info
;
174 /* Symbol index of last C_FILE symbol (-1 if none). */
175 long last_file_index
;
176 /* Contents of last C_FILE symbol. */
177 struct internal_syment last_file
;
178 /* Symbol index of TOC symbol. */
180 /* Start of .loader symbols. */
182 /* Next .loader reloc to swap out. */
184 /* File position of start of line numbers. */
185 file_ptr line_filepos
;
186 /* Buffer large enough to hold swapped symbols of any input file. */
187 struct internal_syment
*internal_syms
;
188 /* Buffer large enough to hold output indices of symbols of any
191 /* Buffer large enough to hold output symbols for any input file. */
193 /* Buffer large enough to hold external line numbers for any input
196 /* Buffer large enough to hold any input section. */
198 /* Buffer large enough to hold external relocs of any input section. */
199 bfd_byte
*external_relocs
;
202 static bfd_boolean
xcoff_mark (struct bfd_link_info
*, asection
*);
206 /* Routines to read XCOFF dynamic information. This don't really
207 belong here, but we already have the ldsym manipulation routines
210 /* Read the contents of a section. */
213 xcoff_get_section_contents (bfd
*abfd
, asection
*sec
)
215 if (coff_section_data (abfd
, sec
) == NULL
)
217 size_t amt
= sizeof (struct coff_section_tdata
);
219 sec
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
220 if (sec
->used_by_bfd
== NULL
)
224 if (coff_section_data (abfd
, sec
)->contents
== NULL
)
228 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
233 coff_section_data (abfd
, sec
)->contents
= contents
;
239 /* Get the size required to hold the dynamic symbols. */
242 _bfd_xcoff_get_dynamic_symtab_upper_bound (bfd
*abfd
)
246 struct internal_ldhdr ldhdr
;
248 if ((abfd
->flags
& DYNAMIC
) == 0)
250 bfd_set_error (bfd_error_invalid_operation
);
254 lsec
= bfd_get_section_by_name (abfd
, ".loader");
257 bfd_set_error (bfd_error_no_symbols
);
261 if (! xcoff_get_section_contents (abfd
, lsec
))
263 contents
= coff_section_data (abfd
, lsec
)->contents
;
265 bfd_xcoff_swap_ldhdr_in (abfd
, (void *) contents
, &ldhdr
);
267 return (ldhdr
.l_nsyms
+ 1) * sizeof (asymbol
*);
270 /* Get the dynamic symbols. */
273 _bfd_xcoff_canonicalize_dynamic_symtab (bfd
*abfd
, asymbol
**psyms
)
277 struct internal_ldhdr ldhdr
;
279 bfd_byte
*elsym
, *elsymend
;
280 coff_symbol_type
*symbuf
;
282 if ((abfd
->flags
& DYNAMIC
) == 0)
284 bfd_set_error (bfd_error_invalid_operation
);
288 lsec
= bfd_get_section_by_name (abfd
, ".loader");
291 bfd_set_error (bfd_error_no_symbols
);
295 if (! xcoff_get_section_contents (abfd
, lsec
))
297 contents
= coff_section_data (abfd
, lsec
)->contents
;
299 coff_section_data (abfd
, lsec
)->keep_contents
= TRUE
;
301 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
303 strings
= (char *) contents
+ ldhdr
.l_stoff
;
305 symbuf
= bfd_zalloc (abfd
, ldhdr
.l_nsyms
* sizeof (* symbuf
));
309 elsym
= contents
+ bfd_xcoff_loader_symbol_offset(abfd
, &ldhdr
);
311 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz(abfd
);
312 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz(abfd
), symbuf
++, psyms
++)
314 struct internal_ldsym ldsym
;
316 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
318 symbuf
->symbol
.the_bfd
= abfd
;
320 if (ldsym
._l
._l_l
._l_zeroes
== 0)
321 symbuf
->symbol
.name
= strings
+ ldsym
._l
._l_l
._l_offset
;
326 c
= bfd_alloc (abfd
, (bfd_size_type
) SYMNMLEN
+ 1);
329 memcpy (c
, ldsym
._l
._l_name
, SYMNMLEN
);
331 symbuf
->symbol
.name
= c
;
334 if (ldsym
.l_smclas
== XMC_XO
)
335 symbuf
->symbol
.section
= bfd_abs_section_ptr
;
337 symbuf
->symbol
.section
= coff_section_from_bfd_index (abfd
,
339 symbuf
->symbol
.value
= ldsym
.l_value
- symbuf
->symbol
.section
->vma
;
341 symbuf
->symbol
.flags
= BSF_NO_FLAGS
;
342 if ((ldsym
.l_smtype
& L_EXPORT
) != 0)
344 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
345 symbuf
->symbol
.flags
|= BSF_WEAK
;
347 symbuf
->symbol
.flags
|= BSF_GLOBAL
;
350 /* FIXME: We have no way to record the other information stored
351 with the loader symbol. */
352 *psyms
= (asymbol
*) symbuf
;
357 return ldhdr
.l_nsyms
;
360 /* Get the size required to hold the dynamic relocs. */
363 _bfd_xcoff_get_dynamic_reloc_upper_bound (bfd
*abfd
)
367 struct internal_ldhdr ldhdr
;
369 if ((abfd
->flags
& DYNAMIC
) == 0)
371 bfd_set_error (bfd_error_invalid_operation
);
375 lsec
= bfd_get_section_by_name (abfd
, ".loader");
378 bfd_set_error (bfd_error_no_symbols
);
382 if (! xcoff_get_section_contents (abfd
, lsec
))
384 contents
= coff_section_data (abfd
, lsec
)->contents
;
386 bfd_xcoff_swap_ldhdr_in (abfd
, (struct external_ldhdr
*) contents
, &ldhdr
);
388 return (ldhdr
.l_nreloc
+ 1) * sizeof (arelent
*);
391 /* Get the dynamic relocs. */
394 _bfd_xcoff_canonicalize_dynamic_reloc (bfd
*abfd
,
400 struct internal_ldhdr ldhdr
;
402 bfd_byte
*elrel
, *elrelend
;
404 if ((abfd
->flags
& DYNAMIC
) == 0)
406 bfd_set_error (bfd_error_invalid_operation
);
410 lsec
= bfd_get_section_by_name (abfd
, ".loader");
413 bfd_set_error (bfd_error_no_symbols
);
417 if (! xcoff_get_section_contents (abfd
, lsec
))
419 contents
= coff_section_data (abfd
, lsec
)->contents
;
421 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
423 relbuf
= bfd_alloc (abfd
, ldhdr
.l_nreloc
* sizeof (arelent
));
427 elrel
= contents
+ bfd_xcoff_loader_reloc_offset(abfd
, &ldhdr
);
429 elrelend
= elrel
+ ldhdr
.l_nreloc
* bfd_xcoff_ldrelsz(abfd
);
430 for (; elrel
< elrelend
; elrel
+= bfd_xcoff_ldrelsz(abfd
), relbuf
++,
433 struct internal_ldrel ldrel
;
435 bfd_xcoff_swap_ldrel_in (abfd
, elrel
, &ldrel
);
437 if (ldrel
.l_symndx
>= 3)
438 relbuf
->sym_ptr_ptr
= syms
+ (ldrel
.l_symndx
- 3);
444 switch (ldrel
.l_symndx
)
460 sec
= bfd_get_section_by_name (abfd
, name
);
463 bfd_set_error (bfd_error_bad_value
);
467 relbuf
->sym_ptr_ptr
= sec
->symbol_ptr_ptr
;
470 relbuf
->address
= ldrel
.l_vaddr
;
473 /* Most dynamic relocs have the same type. FIXME: This is only
474 correct if ldrel.l_rtype == 0. In other cases, we should use
475 a different howto. */
476 relbuf
->howto
= bfd_xcoff_dynamic_reloc_howto(abfd
);
478 /* FIXME: We have no way to record the l_rsecnm field. */
485 return ldhdr
.l_nreloc
;
488 /* Hash functions for xcoff_link_hash_table's archive_info. */
491 xcoff_archive_info_hash (const void *data
)
493 const struct xcoff_archive_info
*info
;
495 info
= (const struct xcoff_archive_info
*) data
;
496 return htab_hash_pointer (info
->archive
);
500 xcoff_archive_info_eq (const void *data1
, const void *data2
)
502 const struct xcoff_archive_info
*info1
;
503 const struct xcoff_archive_info
*info2
;
505 info1
= (const struct xcoff_archive_info
*) data1
;
506 info2
= (const struct xcoff_archive_info
*) data2
;
507 return info1
->archive
== info2
->archive
;
510 /* Return information about archive ARCHIVE. Return NULL on error. */
512 static struct xcoff_archive_info
*
513 xcoff_get_archive_info (struct bfd_link_info
*info
, bfd
*archive
)
515 struct xcoff_link_hash_table
*htab
;
516 struct xcoff_archive_info
*entryp
, entry
;
519 htab
= xcoff_hash_table (info
);
520 entry
.archive
= archive
;
521 slot
= htab_find_slot (htab
->archive_info
, &entry
, INSERT
);
528 entryp
= bfd_zalloc (archive
, sizeof (entry
));
532 entryp
->archive
= archive
;
538 /* Routine to create an entry in an XCOFF link hash table. */
540 static struct bfd_hash_entry
*
541 xcoff_link_hash_newfunc (struct bfd_hash_entry
*entry
,
542 struct bfd_hash_table
*table
,
545 struct xcoff_link_hash_entry
*ret
= (struct xcoff_link_hash_entry
*) entry
;
547 /* Allocate the structure if it has not already been allocated by a
550 ret
= bfd_hash_allocate (table
, sizeof (* ret
));
554 /* Call the allocation method of the superclass. */
555 ret
= ((struct xcoff_link_hash_entry
*)
556 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
560 /* Set local fields. */
562 ret
->toc_section
= NULL
;
563 ret
->u
.toc_indx
= -1;
564 ret
->descriptor
= NULL
;
568 ret
->smclas
= XMC_UA
;
571 return (struct bfd_hash_entry
*) ret
;
574 /* Destroy an XCOFF link hash table. */
577 _bfd_xcoff_bfd_link_hash_table_free (bfd
*obfd
)
579 struct xcoff_link_hash_table
*ret
;
581 ret
= (struct xcoff_link_hash_table
*) obfd
->link
.hash
;
582 if (ret
->archive_info
)
583 htab_delete (ret
->archive_info
);
584 if (ret
->debug_strtab
)
585 _bfd_stringtab_free (ret
->debug_strtab
);
586 _bfd_generic_link_hash_table_free (obfd
);
589 /* Create an XCOFF link hash table. */
591 struct bfd_link_hash_table
*
592 _bfd_xcoff_bfd_link_hash_table_create (bfd
*abfd
)
594 struct xcoff_link_hash_table
*ret
;
595 size_t amt
= sizeof (* ret
);
597 ret
= bfd_zmalloc (amt
);
600 if (!_bfd_link_hash_table_init (&ret
->root
, abfd
, xcoff_link_hash_newfunc
,
601 sizeof (struct xcoff_link_hash_entry
)))
607 ret
->debug_strtab
= _bfd_xcoff_stringtab_init ();
608 ret
->archive_info
= htab_create (37, xcoff_archive_info_hash
,
609 xcoff_archive_info_eq
, NULL
);
610 if (!ret
->debug_strtab
|| !ret
->archive_info
)
612 _bfd_xcoff_bfd_link_hash_table_free (abfd
);
615 ret
->root
.hash_table_free
= _bfd_xcoff_bfd_link_hash_table_free
;
617 /* The linker will always generate a full a.out header. We need to
618 record that fact now, before the sizeof_headers routine could be
620 xcoff_data (abfd
)->full_aouthdr
= TRUE
;
625 /* Read internal relocs for an XCOFF csect. This is a wrapper around
626 _bfd_coff_read_internal_relocs which tries to take advantage of any
627 relocs which may have been cached for the enclosing section. */
629 static struct internal_reloc
*
630 xcoff_read_internal_relocs (bfd
*abfd
,
633 bfd_byte
*external_relocs
,
634 bfd_boolean require_internal
,
635 struct internal_reloc
*internal_relocs
)
637 if (coff_section_data (abfd
, sec
) != NULL
638 && coff_section_data (abfd
, sec
)->relocs
== NULL
639 && xcoff_section_data (abfd
, sec
) != NULL
)
643 enclosing
= xcoff_section_data (abfd
, sec
)->enclosing
;
645 if (enclosing
!= NULL
646 && (coff_section_data (abfd
, enclosing
) == NULL
647 || coff_section_data (abfd
, enclosing
)->relocs
== NULL
)
649 && enclosing
->reloc_count
> 0)
651 if (_bfd_coff_read_internal_relocs (abfd
, enclosing
, TRUE
,
652 external_relocs
, FALSE
, NULL
)
657 if (enclosing
!= NULL
658 && coff_section_data (abfd
, enclosing
) != NULL
659 && coff_section_data (abfd
, enclosing
)->relocs
!= NULL
)
663 off
= ((sec
->rel_filepos
- enclosing
->rel_filepos
)
664 / bfd_coff_relsz (abfd
));
666 if (! require_internal
)
667 return coff_section_data (abfd
, enclosing
)->relocs
+ off
;
668 memcpy (internal_relocs
,
669 coff_section_data (abfd
, enclosing
)->relocs
+ off
,
670 sec
->reloc_count
* sizeof (struct internal_reloc
));
671 return internal_relocs
;
675 return _bfd_coff_read_internal_relocs (abfd
, sec
, cache
, external_relocs
,
676 require_internal
, internal_relocs
);
679 /* Split FILENAME into an import path and an import filename,
680 storing them in *IMPPATH and *IMPFILE respectively. */
683 bfd_xcoff_split_import_path (bfd
*abfd
, const char *filename
,
684 const char **imppath
, const char **impfile
)
690 base
= lbasename (filename
);
691 length
= base
- filename
;
693 /* The filename has no directory component, so use an empty path. */
695 else if (length
== 1)
696 /* The filename is in the root directory. */
700 /* Extract the (non-empty) directory part. Note that we don't
701 need to strip duplicate directory separators from any part
702 of the string; the native linker doesn't do that either. */
703 path
= bfd_alloc (abfd
, length
);
706 memcpy (path
, filename
, length
- 1);
707 path
[length
- 1] = 0;
714 /* Set ARCHIVE's import path as though its filename had been given
718 bfd_xcoff_set_archive_import_path (struct bfd_link_info
*info
,
719 bfd
*archive
, const char *filename
)
721 struct xcoff_archive_info
*archive_info
;
723 archive_info
= xcoff_get_archive_info (info
, archive
);
724 return (archive_info
!= NULL
725 && bfd_xcoff_split_import_path (archive
, filename
,
726 &archive_info
->imppath
,
727 &archive_info
->impfile
));
730 /* H is an imported symbol. Set the import module's path, file and member
731 to IMPATH, IMPFILE and IMPMEMBER respectively. All three are null if
732 no specific import module is specified. */
735 xcoff_set_import_path (struct bfd_link_info
*info
,
736 struct xcoff_link_hash_entry
*h
,
737 const char *imppath
, const char *impfile
,
738 const char *impmember
)
741 struct xcoff_import_file
**pp
;
743 /* We overload the ldindx field to hold the l_ifile value for this
745 BFD_ASSERT (h
->ldsym
== NULL
);
746 BFD_ASSERT ((h
->flags
& XCOFF_BUILT_LDSYM
) == 0);
751 /* We start c at 1 because the first entry in the import list is
752 reserved for the library search path. */
753 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
755 pp
= &(*pp
)->next
, ++c
)
757 if (filename_cmp ((*pp
)->path
, imppath
) == 0
758 && filename_cmp ((*pp
)->file
, impfile
) == 0
759 && filename_cmp ((*pp
)->member
, impmember
) == 0)
765 struct xcoff_import_file
*n
;
766 size_t amt
= sizeof (*n
);
768 n
= bfd_alloc (info
->output_bfd
, amt
);
774 n
->member
= impmember
;
782 /* H is the bfd symbol associated with exported .loader symbol LDSYM.
783 Return true if LDSYM defines H. */
786 xcoff_dynamic_definition_p (struct xcoff_link_hash_entry
*h
,
787 struct internal_ldsym
*ldsym
)
789 /* If we didn't know about H before processing LDSYM, LDSYM
790 definitely defines H. */
791 if (h
->root
.type
== bfd_link_hash_new
)
794 /* If H is currently a weak dynamic symbol, and if LDSYM is a strong
795 dynamic symbol, LDSYM trumps the current definition of H. */
796 if ((ldsym
->l_smtype
& L_WEAK
) == 0
797 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0
798 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
799 && (h
->root
.type
== bfd_link_hash_defweak
800 || h
->root
.type
== bfd_link_hash_undefweak
))
803 /* If H is currently undefined, LDSYM defines it. */
804 if ((h
->flags
& XCOFF_DEF_DYNAMIC
) == 0
805 && (h
->root
.type
== bfd_link_hash_undefined
806 || h
->root
.type
== bfd_link_hash_undefweak
))
812 /* This function is used to add symbols from a dynamic object to the
813 global symbol table. */
816 xcoff_link_add_dynamic_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
820 struct internal_ldhdr ldhdr
;
822 bfd_byte
*elsym
, *elsymend
;
823 struct xcoff_import_file
*n
;
825 struct xcoff_import_file
**pp
;
827 /* We can only handle a dynamic object if we are generating an XCOFF
829 if (info
->output_bfd
->xvec
!= abfd
->xvec
)
832 (_("%pB: XCOFF shared object when not producing XCOFF output"),
834 bfd_set_error (bfd_error_invalid_operation
);
838 /* The symbols we use from a dynamic object are not the symbols in
839 the normal symbol table, but, rather, the symbols in the export
840 table. If there is a global symbol in a dynamic object which is
841 not in the export table, the loader will not be able to find it,
842 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
843 libc.a has symbols in the export table which are not in the
846 /* Read in the .loader section. FIXME: We should really use the
847 o_snloader field in the a.out header, rather than grabbing the
849 lsec
= bfd_get_section_by_name (abfd
, ".loader");
853 (_("%pB: dynamic object with no .loader section"),
855 bfd_set_error (bfd_error_no_symbols
);
859 if (! xcoff_get_section_contents (abfd
, lsec
))
861 contents
= coff_section_data (abfd
, lsec
)->contents
;
863 /* Remove the sections from this object, so that they do not get
864 included in the link. */
865 bfd_section_list_clear (abfd
);
867 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
869 strings
= (char *) contents
+ ldhdr
.l_stoff
;
871 elsym
= contents
+ bfd_xcoff_loader_symbol_offset(abfd
, &ldhdr
);
873 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz(abfd
);
875 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz(abfd
))
877 struct internal_ldsym ldsym
;
878 char nambuf
[SYMNMLEN
+ 1];
880 struct xcoff_link_hash_entry
*h
;
882 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
884 /* We are only interested in exported symbols. */
885 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
888 if (ldsym
._l
._l_l
._l_zeroes
== 0)
889 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
892 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
893 nambuf
[SYMNMLEN
] = '\0';
897 /* Normally we could not call xcoff_link_hash_lookup in an add
898 symbols routine, since we might not be using an XCOFF hash
899 table. However, we verified above that we are using an XCOFF
902 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, TRUE
,
907 if (!xcoff_dynamic_definition_p (h
, &ldsym
))
910 h
->flags
|= XCOFF_DEF_DYNAMIC
;
911 h
->smclas
= ldsym
.l_smclas
;
912 if (h
->smclas
== XMC_XO
)
914 /* This symbol has an absolute value. */
915 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
916 h
->root
.type
= bfd_link_hash_defweak
;
918 h
->root
.type
= bfd_link_hash_defined
;
919 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
920 h
->root
.u
.def
.value
= ldsym
.l_value
;
924 /* Otherwise, we don't bother to actually define the symbol,
925 since we don't have a section to put it in anyhow.
926 We assume instead that an undefined XCOFF_DEF_DYNAMIC symbol
927 should be imported from the symbol's undef.abfd. */
928 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
929 h
->root
.type
= bfd_link_hash_undefweak
;
931 h
->root
.type
= bfd_link_hash_undefined
;
932 h
->root
.u
.undef
.abfd
= abfd
;
935 /* If this symbol defines a function descriptor, then it
936 implicitly defines the function code as well. */
937 if (h
->smclas
== XMC_DS
938 || (h
->smclas
== XMC_XO
&& name
[0] != '.'))
939 h
->flags
|= XCOFF_DESCRIPTOR
;
940 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
942 struct xcoff_link_hash_entry
*hds
;
949 dsnm
= bfd_malloc ((bfd_size_type
) strlen (name
) + 2);
953 strcpy (dsnm
+ 1, name
);
954 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
), dsnm
,
964 if (xcoff_dynamic_definition_p (hds
, &ldsym
))
966 hds
->root
.type
= h
->root
.type
;
967 hds
->flags
|= XCOFF_DEF_DYNAMIC
;
968 if (h
->smclas
== XMC_XO
)
970 /* An absolute symbol appears to actually define code, not a
971 function descriptor. This is how some math functions are
972 implemented on AIX 4.1. */
973 hds
->smclas
= XMC_XO
;
974 hds
->root
.u
.def
.section
= bfd_abs_section_ptr
;
975 hds
->root
.u
.def
.value
= ldsym
.l_value
;
979 hds
->smclas
= XMC_PR
;
980 hds
->root
.u
.undef
.abfd
= abfd
;
981 /* We do not want to add this to the undefined
988 if (contents
!= NULL
&& ! coff_section_data (abfd
, lsec
)->keep_contents
)
990 free (coff_section_data (abfd
, lsec
)->contents
);
991 coff_section_data (abfd
, lsec
)->contents
= NULL
;
994 /* Record this file in the import files. */
995 n
= bfd_alloc (abfd
, (bfd_size_type
) sizeof (struct xcoff_import_file
));
1000 if (abfd
->my_archive
== NULL
|| bfd_is_thin_archive (abfd
->my_archive
))
1002 if (!bfd_xcoff_split_import_path (abfd
, bfd_get_filename (abfd
),
1003 &n
->path
, &n
->file
))
1009 struct xcoff_archive_info
*archive_info
;
1011 archive_info
= xcoff_get_archive_info (info
, abfd
->my_archive
);
1012 if (!archive_info
->impfile
)
1014 if (!bfd_xcoff_split_import_path (archive_info
->archive
,
1015 bfd_get_filename (archive_info
1017 &archive_info
->imppath
,
1018 &archive_info
->impfile
))
1021 n
->path
= archive_info
->imppath
;
1022 n
->file
= archive_info
->impfile
;
1023 n
->member
= bfd_get_filename (abfd
);
1026 /* We start c at 1 because the first import file number is reserved
1028 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
1030 pp
= &(*pp
)->next
, ++c
)
1034 xcoff_data (abfd
)->import_file_id
= c
;
1039 /* xcoff_link_create_extra_sections
1041 Takes care of creating the .loader, .gl, .ds, .debug and sections. */
1044 xcoff_link_create_extra_sections (bfd
* abfd
, struct bfd_link_info
*info
)
1046 bfd_boolean return_value
= FALSE
;
1048 if (info
->output_bfd
->xvec
== abfd
->xvec
)
1050 /* We need to build a .loader section, so we do it here. This
1051 won't work if we're producing an XCOFF output file with no
1052 XCOFF input files. FIXME. */
1054 if (!bfd_link_relocatable (info
)
1055 && xcoff_hash_table (info
)->loader_section
== NULL
)
1058 flagword flags
= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1060 lsec
= bfd_make_section_anyway_with_flags (abfd
, ".loader", flags
);
1064 xcoff_hash_table (info
)->loader_section
= lsec
;
1067 /* Likewise for the linkage section. */
1068 if (xcoff_hash_table (info
)->linkage_section
== NULL
)
1071 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1074 lsec
= bfd_make_section_anyway_with_flags (abfd
, ".gl", flags
);
1078 xcoff_hash_table (info
)->linkage_section
= lsec
;
1079 lsec
->alignment_power
= 2;
1082 /* Likewise for the TOC section. */
1083 if (xcoff_hash_table (info
)->toc_section
== NULL
)
1086 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1089 tsec
= bfd_make_section_anyway_with_flags (abfd
, ".tc", flags
);
1093 xcoff_hash_table (info
)->toc_section
= tsec
;
1094 tsec
->alignment_power
= 2;
1097 /* Likewise for the descriptor section. */
1098 if (xcoff_hash_table (info
)->descriptor_section
== NULL
)
1101 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1104 dsec
= bfd_make_section_anyway_with_flags (abfd
, ".ds", flags
);
1108 xcoff_hash_table (info
)->descriptor_section
= dsec
;
1109 dsec
->alignment_power
= 2;
1112 /* Likewise for the .debug section. */
1113 if (xcoff_hash_table (info
)->debug_section
== NULL
1114 && info
->strip
!= strip_all
)
1117 flagword flags
= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1119 dsec
= bfd_make_section_anyway_with_flags (abfd
, ".debug", flags
);
1123 xcoff_hash_table (info
)->debug_section
= dsec
;
1127 return_value
= TRUE
;
1131 return return_value
;
1134 /* Returns the index of reloc in RELOCS with the least address greater
1135 than or equal to ADDRESS. The relocs are sorted by address. */
1137 static bfd_size_type
1138 xcoff_find_reloc (struct internal_reloc
*relocs
,
1139 bfd_size_type count
,
1142 bfd_size_type min
, max
, this;
1146 if (count
== 1 && relocs
[0].r_vaddr
< address
)
1155 /* Do a binary search over (min,max]. */
1156 while (min
+ 1 < max
)
1160 this = (max
+ min
) / 2;
1161 raddr
= relocs
[this].r_vaddr
;
1162 if (raddr
> address
)
1164 else if (raddr
< address
)
1173 if (relocs
[min
].r_vaddr
< address
)
1177 && relocs
[min
- 1].r_vaddr
== address
)
1183 /* Add all the symbols from an object file to the hash table.
1185 XCOFF is a weird format. A normal XCOFF .o files will have three
1186 COFF sections--.text, .data, and .bss--but each COFF section will
1187 contain many csects. These csects are described in the symbol
1188 table. From the linker's point of view, each csect must be
1189 considered a section in its own right. For example, a TOC entry is
1190 handled as a small XMC_TC csect. The linker must be able to merge
1191 different TOC entries together, which means that it must be able to
1192 extract the XMC_TC csects from the .data section of the input .o
1195 From the point of view of our linker, this is, of course, a hideous
1196 nightmare. We cope by actually creating sections for each csect,
1197 and discarding the original sections. We then have to handle the
1198 relocation entries carefully, since the only way to tell which
1199 csect they belong to is to examine the address. */
1202 xcoff_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
1204 unsigned int n_tmask
;
1205 unsigned int n_btshft
;
1206 bfd_boolean default_copy
;
1207 bfd_size_type symcount
;
1208 struct xcoff_link_hash_entry
**sym_hash
;
1209 asection
**csect_cache
;
1210 unsigned int *lineno_counts
;
1211 bfd_size_type linesz
;
1213 asection
*last_real
;
1214 bfd_boolean keep_syms
;
1216 unsigned int csect_index
;
1217 asection
*first_csect
;
1218 bfd_size_type symesz
;
1221 struct reloc_info_struct
1223 struct internal_reloc
*relocs
;
1226 } *reloc_info
= NULL
;
1229 keep_syms
= obj_coff_keep_syms (abfd
);
1231 if ((abfd
->flags
& DYNAMIC
) != 0
1232 && ! info
->static_link
)
1234 if (! xcoff_link_add_dynamic_symbols (abfd
, info
))
1238 /* Create the loader, toc, gl, ds and debug sections, if needed. */
1239 if (! xcoff_link_create_extra_sections (abfd
, info
))
1242 if ((abfd
->flags
& DYNAMIC
) != 0
1243 && ! info
->static_link
)
1246 n_tmask
= coff_data (abfd
)->local_n_tmask
;
1247 n_btshft
= coff_data (abfd
)->local_n_btshft
;
1249 /* Define macros so that ISFCN, et. al., macros work correctly. */
1250 #define N_TMASK n_tmask
1251 #define N_BTSHFT n_btshft
1253 if (info
->keep_memory
)
1254 default_copy
= FALSE
;
1256 default_copy
= TRUE
;
1258 symcount
= obj_raw_syment_count (abfd
);
1260 /* We keep a list of the linker hash table entries that correspond
1261 to each external symbol. */
1262 amt
= symcount
* sizeof (struct xcoff_link_hash_entry
*);
1263 sym_hash
= bfd_zalloc (abfd
, amt
);
1264 if (sym_hash
== NULL
&& symcount
!= 0)
1266 coff_data (abfd
)->sym_hashes
= (struct coff_link_hash_entry
**) sym_hash
;
1268 /* Because of the weird stuff we are doing with XCOFF csects, we can
1269 not easily determine which section a symbol is in, so we store
1270 the information in the tdata for the input file. */
1271 amt
= symcount
* sizeof (asection
*);
1272 csect_cache
= bfd_zalloc (abfd
, amt
);
1273 if (csect_cache
== NULL
&& symcount
!= 0)
1275 xcoff_data (abfd
)->csects
= csect_cache
;
1277 /* We garbage-collect line-number information on a symbol-by-symbol
1278 basis, so we need to have quick access to the number of entries
1280 amt
= symcount
* sizeof (unsigned int);
1281 lineno_counts
= bfd_zalloc (abfd
, amt
);
1282 if (lineno_counts
== NULL
&& symcount
!= 0)
1284 xcoff_data (abfd
)->lineno_counts
= lineno_counts
;
1286 /* While splitting sections into csects, we need to assign the
1287 relocs correctly. The relocs and the csects must both be in
1288 order by VMA within a given section, so we handle this by
1289 scanning along the relocs as we process the csects. We index
1290 into reloc_info using the section target_index. */
1291 amt
= abfd
->section_count
+ 1;
1292 amt
*= sizeof (struct reloc_info_struct
);
1293 reloc_info
= bfd_zmalloc (amt
);
1294 if (reloc_info
== NULL
)
1297 /* Read in the relocs and line numbers for each section. */
1298 linesz
= bfd_coff_linesz (abfd
);
1300 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1304 if ((o
->flags
& SEC_RELOC
) != 0)
1306 reloc_info
[o
->target_index
].relocs
=
1307 xcoff_read_internal_relocs (abfd
, o
, TRUE
, NULL
, FALSE
, NULL
);
1308 amt
= o
->reloc_count
;
1309 amt
*= sizeof (asection
*);
1310 reloc_info
[o
->target_index
].csects
= bfd_zmalloc (amt
);
1311 if (reloc_info
[o
->target_index
].csects
== NULL
)
1315 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1316 && o
->lineno_count
> 0)
1320 if (bfd_seek (abfd
, o
->line_filepos
, SEEK_SET
) != 0)
1322 if (_bfd_mul_overflow (linesz
, o
->lineno_count
, &amt
))
1324 bfd_set_error (bfd_error_file_too_big
);
1327 linenos
= _bfd_malloc_and_read (abfd
, amt
, amt
);
1328 if (linenos
== NULL
)
1330 reloc_info
[o
->target_index
].linenos
= linenos
;
1334 /* Don't let the linker relocation routines discard the symbols. */
1335 obj_coff_keep_syms (abfd
) = TRUE
;
1341 symesz
= bfd_coff_symesz (abfd
);
1342 BFD_ASSERT (symesz
== bfd_coff_auxesz (abfd
));
1343 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
1344 esym_end
= esym
+ symcount
* symesz
;
1346 while (esym
< esym_end
)
1348 struct internal_syment sym
;
1349 union internal_auxent aux
;
1351 char buf
[SYMNMLEN
+ 1];
1355 struct xcoff_link_hash_entry
*set_toc
;
1357 bfd_coff_swap_sym_in (abfd
, (void *) esym
, (void *) &sym
);
1359 /* In this pass we are only interested in symbols with csect
1361 if (!CSECT_SYM_P (sym
.n_sclass
))
1364 Normally csect is a .pr, .rw etc. created in the loop
1365 If C_FILE or first time, handle special
1367 Advance esym, sym_hash, csect_hash ptrs. */
1368 if (sym
.n_sclass
== C_FILE
|| sym
.n_sclass
== C_DWARF
)
1371 *csect_cache
= csect
;
1372 else if (first_csect
== NULL
1373 || sym
.n_sclass
== C_FILE
|| sym
.n_sclass
== C_DWARF
)
1374 *csect_cache
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1376 *csect_cache
= NULL
;
1377 esym
+= (sym
.n_numaux
+ 1) * symesz
;
1378 sym_hash
+= sym
.n_numaux
+ 1;
1379 csect_cache
+= sym
.n_numaux
+ 1;
1380 lineno_counts
+= sym
.n_numaux
+ 1;
1385 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
1390 /* If this symbol has line number information attached to it,
1391 and we're not stripping it, count the number of entries and
1392 add them to the count for this csect. In the final link pass
1393 we are going to attach line number information by symbol,
1394 rather than by section, in order to more easily handle
1395 garbage collection. */
1396 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1399 && ISFCN (sym
.n_type
))
1401 union internal_auxent auxlin
;
1403 bfd_coff_swap_aux_in (abfd
, (void *) (esym
+ symesz
),
1404 sym
.n_type
, sym
.n_sclass
,
1405 0, sym
.n_numaux
, (void *) &auxlin
);
1407 if (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
1409 asection
*enclosing
;
1410 bfd_signed_vma linoff
;
1412 enclosing
= xcoff_section_data (abfd
, csect
)->enclosing
;
1413 if (enclosing
== NULL
)
1416 /* xgettext:c-format */
1417 (_("%pB: `%s' has line numbers but no enclosing section"),
1419 bfd_set_error (bfd_error_bad_value
);
1422 linoff
= (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
1423 - enclosing
->line_filepos
);
1424 /* Explicit cast to bfd_signed_vma for compiler. */
1425 if (linoff
< (bfd_signed_vma
) (enclosing
->lineno_count
* linesz
))
1427 struct internal_lineno lin
;
1428 bfd_byte
*linpstart
;
1430 linpstart
= (reloc_info
[enclosing
->target_index
].linenos
1432 bfd_coff_swap_lineno_in (abfd
, (void *) linpstart
, (void *) &lin
);
1434 && ((bfd_size_type
) lin
.l_addr
.l_symndx
1436 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1439 bfd_byte
*linpend
, *linp
;
1441 linpend
= (reloc_info
[enclosing
->target_index
].linenos
1442 + enclosing
->lineno_count
* linesz
);
1443 for (linp
= linpstart
+ linesz
;
1447 bfd_coff_swap_lineno_in (abfd
, (void *) linp
,
1449 if (lin
.l_lnno
== 0)
1452 *lineno_counts
= (linp
- linpstart
) / linesz
;
1453 /* The setting of line_filepos will only be
1454 useful if all the line number entries for a
1455 csect are contiguous; this only matters for
1457 if (csect
->line_filepos
== 0)
1458 csect
->line_filepos
=
1459 auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1465 /* Pick up the csect auxiliary information. */
1466 if (sym
.n_numaux
== 0)
1469 /* xgettext:c-format */
1470 (_("%pB: class %d symbol `%s' has no aux entries"),
1471 abfd
, sym
.n_sclass
, name
);
1472 bfd_set_error (bfd_error_bad_value
);
1476 bfd_coff_swap_aux_in (abfd
,
1477 (void *) (esym
+ symesz
* sym
.n_numaux
),
1478 sym
.n_type
, sym
.n_sclass
,
1479 sym
.n_numaux
- 1, sym
.n_numaux
,
1482 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
1492 /* xgettext:c-format */
1493 (_("%pB: symbol `%s' has unrecognized csect type %d"),
1495 bfd_set_error (bfd_error_bad_value
);
1499 /* This is an external reference. */
1500 if (sym
.n_sclass
== C_HIDEXT
1501 || sym
.n_scnum
!= N_UNDEF
1502 || aux
.x_csect
.x_scnlen
.l
!= 0)
1505 /* xgettext:c-format */
1506 (_("%pB: bad XTY_ER symbol `%s': class %d scnum %d "
1508 abfd
, name
, sym
.n_sclass
, sym
.n_scnum
,
1509 (int64_t) aux
.x_csect
.x_scnlen
.l
);
1510 bfd_set_error (bfd_error_bad_value
);
1514 /* An XMC_XO external reference is actually a reference to
1515 an absolute location. */
1516 if (aux
.x_csect
.x_smclas
!= XMC_XO
)
1517 section
= bfd_und_section_ptr
;
1520 section
= bfd_abs_section_ptr
;
1521 value
= sym
.n_value
;
1527 csect_index
= -(unsigned) 1;
1529 /* When we see a TOC anchor, we record the TOC value. */
1530 if (aux
.x_csect
.x_smclas
== XMC_TC0
)
1532 if (sym
.n_sclass
!= C_HIDEXT
1533 || aux
.x_csect
.x_scnlen
.l
!= 0)
1536 /* xgettext:c-format */
1537 (_("%pB: XMC_TC0 symbol `%s' is class %d scnlen %" PRId64
),
1538 abfd
, name
, sym
.n_sclass
, (int64_t) aux
.x_csect
.x_scnlen
.l
);
1539 bfd_set_error (bfd_error_bad_value
);
1542 xcoff_data (abfd
)->toc
= sym
.n_value
;
1545 /* We must merge TOC entries for the same symbol. We can
1546 merge two TOC entries if they are both C_HIDEXT, they
1547 both have the same name, they are both 4 or 8 bytes long, and
1548 they both have a relocation table entry for an external
1549 symbol with the same name. Unfortunately, this means
1550 that we must look through the relocations. Ick.
1552 Logic for 32 bit vs 64 bit.
1553 32 bit has a csect length of 4 for TOC
1554 64 bit has a csect length of 8 for TOC
1556 The conditions to get past the if-check are not that bad.
1557 They are what is used to create the TOC csects in the first
1559 if (aux
.x_csect
.x_smclas
== XMC_TC
1560 && sym
.n_sclass
== C_HIDEXT
1561 && info
->output_bfd
->xvec
== abfd
->xvec
1562 && ((bfd_xcoff_is_xcoff32 (abfd
)
1563 && aux
.x_csect
.x_scnlen
.l
== 4)
1564 || (bfd_xcoff_is_xcoff64 (abfd
)
1565 && aux
.x_csect
.x_scnlen
.l
== 8)))
1567 asection
*enclosing
;
1568 struct internal_reloc
*relocs
;
1569 bfd_size_type relindx
;
1570 struct internal_reloc
*rel
;
1572 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1573 if (enclosing
== NULL
)
1576 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1577 amt
= enclosing
->reloc_count
;
1578 relindx
= xcoff_find_reloc (relocs
, amt
, sym
.n_value
);
1579 rel
= relocs
+ relindx
;
1581 /* 32 bit R_POS r_size is 31
1582 64 bit R_POS r_size is 63 */
1583 if (relindx
< enclosing
->reloc_count
1584 && rel
->r_vaddr
== (bfd_vma
) sym
.n_value
1585 && rel
->r_type
== R_POS
1586 && ((bfd_xcoff_is_xcoff32 (abfd
)
1587 && rel
->r_size
== 31)
1588 || (bfd_xcoff_is_xcoff64 (abfd
)
1589 && rel
->r_size
== 63)))
1593 struct internal_syment relsym
;
1595 erelsym
= ((bfd_byte
*) obj_coff_external_syms (abfd
)
1596 + rel
->r_symndx
* symesz
);
1597 bfd_coff_swap_sym_in (abfd
, (void *) erelsym
, (void *) &relsym
);
1598 if (EXTERN_SYM_P (relsym
.n_sclass
))
1600 const char *relname
;
1601 char relbuf
[SYMNMLEN
+ 1];
1603 struct xcoff_link_hash_entry
*h
;
1605 /* At this point we know that the TOC entry is
1606 for an externally visible symbol. */
1607 relname
= _bfd_coff_internal_syment_name (abfd
, &relsym
,
1609 if (relname
== NULL
)
1612 /* We only merge TOC entries if the TC name is
1613 the same as the symbol name. This handles
1614 the normal case, but not common cases like
1615 SYM.P4 which gcc generates to store SYM + 4
1616 in the TOC. FIXME. */
1617 if (strcmp (name
, relname
) == 0)
1619 copy
= (! info
->keep_memory
1620 || relsym
._n
._n_n
._n_zeroes
!= 0
1621 || relsym
._n
._n_n
._n_offset
== 0);
1622 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1623 relname
, TRUE
, copy
,
1628 /* At this point h->root.type could be
1629 bfd_link_hash_new. That should be OK,
1630 since we know for sure that we will come
1631 across this symbol as we step through the
1634 /* We store h in *sym_hash for the
1635 convenience of the relocate_section
1639 if (h
->toc_section
!= NULL
)
1641 asection
**rel_csects
;
1643 /* We already have a TOC entry for this
1644 symbol, so we can just ignore this
1647 reloc_info
[enclosing
->target_index
].csects
;
1648 rel_csects
[relindx
] = bfd_und_section_ptr
;
1652 /* We are about to create a TOC entry for
1661 asection
*enclosing
;
1663 /* We need to create a new section. We get the name from
1664 the csect storage mapping class, so that the linker can
1665 accumulate similar csects together. */
1667 csect
= bfd_xcoff_create_csect_from_smclas(abfd
, &aux
, name
);
1671 /* The enclosing section is the main section : .data, .text
1672 or .bss that the csect is coming from. */
1673 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1674 if (enclosing
== NULL
)
1677 if (! bfd_is_abs_section (enclosing
)
1678 && ((bfd_vma
) sym
.n_value
< enclosing
->vma
1679 || ((bfd_vma
) sym
.n_value
+ aux
.x_csect
.x_scnlen
.l
1680 > enclosing
->vma
+ enclosing
->size
)))
1683 /* xgettext:c-format */
1684 (_("%pB: csect `%s' not in enclosing section"),
1686 bfd_set_error (bfd_error_bad_value
);
1689 csect
->vma
= sym
.n_value
;
1690 csect
->filepos
= (enclosing
->filepos
1693 csect
->size
= aux
.x_csect
.x_scnlen
.l
;
1694 csect
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
;
1695 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1697 /* Record the enclosing section in the tdata for this new
1699 amt
= sizeof (struct coff_section_tdata
);
1700 csect
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
1701 if (csect
->used_by_bfd
== NULL
)
1703 amt
= sizeof (struct xcoff_section_tdata
);
1704 coff_section_data (abfd
, csect
)->tdata
= bfd_zalloc (abfd
, amt
);
1705 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1707 xcoff_section_data (abfd
, csect
)->enclosing
= enclosing
;
1708 xcoff_section_data (abfd
, csect
)->lineno_count
=
1709 enclosing
->lineno_count
;
1711 if (enclosing
->owner
== abfd
)
1713 struct internal_reloc
*relocs
;
1714 bfd_size_type relindx
;
1715 struct internal_reloc
*rel
;
1716 asection
**rel_csect
;
1718 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1719 amt
= enclosing
->reloc_count
;
1720 relindx
= xcoff_find_reloc (relocs
, amt
, csect
->vma
);
1722 rel
= relocs
+ relindx
;
1723 rel_csect
= (reloc_info
[enclosing
->target_index
].csects
1726 csect
->rel_filepos
= (enclosing
->rel_filepos
1727 + relindx
* bfd_coff_relsz (abfd
));
1728 while (relindx
< enclosing
->reloc_count
1729 && *rel_csect
== NULL
1730 && rel
->r_vaddr
< csect
->vma
+ csect
->size
)
1734 csect
->flags
|= SEC_RELOC
;
1735 ++csect
->reloc_count
;
1742 /* There are a number of other fields and section flags
1743 which we do not bother to set. */
1745 csect_index
= ((esym
1746 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1749 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1751 if (first_csect
== NULL
)
1752 first_csect
= csect
;
1754 /* If this symbol is external, we treat it as starting at the
1755 beginning of the newly created section. */
1756 if (EXTERN_SYM_P (sym
.n_sclass
))
1762 /* If this is a TOC section for a symbol, record it. */
1763 if (set_toc
!= NULL
)
1764 set_toc
->toc_section
= csect
;
1769 /* This is a label definition. The x_scnlen field is the
1770 symbol index of the csect. Usually the XTY_LD symbol will
1771 follow its appropriate XTY_SD symbol. The .set pseudo op can
1772 cause the XTY_LD to not follow the XTY_SD symbol. */
1777 if (aux
.x_csect
.x_scnlen
.l
< 0
1778 || (aux
.x_csect
.x_scnlen
.l
1779 >= esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)))
1783 section
= xcoff_data (abfd
)->csects
[aux
.x_csect
.x_scnlen
.l
];
1785 || (section
->flags
& SEC_HAS_CONTENTS
) == 0)
1791 /* xgettext:c-format */
1792 (_("%pB: misplaced XTY_LD `%s'"),
1794 bfd_set_error (bfd_error_bad_value
);
1798 value
= sym
.n_value
- csect
->vma
;
1803 /* This is an unitialized csect. We could base the name on
1804 the storage mapping class, but we don't bother except for
1805 an XMC_TD symbol. If this csect is externally visible,
1806 it is a common symbol. We put XMC_TD symbols in sections
1807 named .tocbss, and rely on the linker script to put that
1810 if (aux
.x_csect
.x_smclas
== XMC_TD
)
1812 /* The linker script puts the .td section in the data
1813 section after the .tc section. */
1814 csect
= bfd_make_section_anyway_with_flags (abfd
, ".td",
1818 csect
= bfd_make_section_anyway_with_flags (abfd
, ".bss",
1823 csect
->vma
= sym
.n_value
;
1824 csect
->size
= aux
.x_csect
.x_scnlen
.l
;
1825 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1826 /* There are a number of other fields and section flags
1827 which we do not bother to set. */
1829 csect_index
= ((esym
1830 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1833 amt
= sizeof (struct coff_section_tdata
);
1834 csect
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
1835 if (csect
->used_by_bfd
== NULL
)
1837 amt
= sizeof (struct xcoff_section_tdata
);
1838 coff_section_data (abfd
, csect
)->tdata
= bfd_zalloc (abfd
, amt
);
1839 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1841 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1843 if (first_csect
== NULL
)
1844 first_csect
= csect
;
1846 if (EXTERN_SYM_P (sym
.n_sclass
))
1848 csect
->flags
|= SEC_IS_COMMON
;
1851 value
= aux
.x_csect
.x_scnlen
.l
;
1857 /* Check for magic symbol names. */
1858 if ((smtyp
== XTY_SD
|| smtyp
== XTY_CM
)
1859 && aux
.x_csect
.x_smclas
!= XMC_TC
1860 && aux
.x_csect
.x_smclas
!= XMC_TD
)
1866 if (strcmp (name
, "_text") == 0)
1867 i
= XCOFF_SPECIAL_SECTION_TEXT
;
1868 else if (strcmp (name
, "_etext") == 0)
1869 i
= XCOFF_SPECIAL_SECTION_ETEXT
;
1870 else if (strcmp (name
, "_data") == 0)
1871 i
= XCOFF_SPECIAL_SECTION_DATA
;
1872 else if (strcmp (name
, "_edata") == 0)
1873 i
= XCOFF_SPECIAL_SECTION_EDATA
;
1874 else if (strcmp (name
, "_end") == 0)
1875 i
= XCOFF_SPECIAL_SECTION_END
;
1877 else if (name
[0] == 'e' && strcmp (name
, "end") == 0)
1878 i
= XCOFF_SPECIAL_SECTION_END2
;
1881 xcoff_hash_table (info
)->special_sections
[i
] = csect
;
1884 /* Now we have enough information to add the symbol to the
1885 linker hash table. */
1887 if (EXTERN_SYM_P (sym
.n_sclass
))
1889 bfd_boolean copy
, ok
;
1892 BFD_ASSERT (section
!= NULL
);
1894 /* We must copy the name into memory if we got it from the
1895 syment itself, rather than the string table. */
1896 copy
= default_copy
;
1897 if (sym
._n
._n_n
._n_zeroes
!= 0
1898 || sym
._n
._n_n
._n_offset
== 0)
1901 /* Ignore global linkage code when linking statically. */
1902 if (info
->static_link
1903 && (smtyp
== XTY_SD
|| smtyp
== XTY_LD
)
1904 && aux
.x_csect
.x_smclas
== XMC_GL
)
1906 section
= bfd_und_section_ptr
;
1910 /* The AIX linker appears to only detect multiple symbol
1911 definitions when there is a reference to the symbol. If
1912 a symbol is defined multiple times, and the only
1913 references are from the same object file, the AIX linker
1914 appears to permit it. It does not merge the different
1915 definitions, but handles them independently. On the
1916 other hand, if there is a reference, the linker reports
1919 This matters because the AIX <net/net_globals.h> header
1920 file actually defines an initialized array, so we have to
1921 actually permit that to work.
1923 Just to make matters even more confusing, the AIX linker
1924 appears to permit multiple symbol definitions whenever
1925 the second definition is in an archive rather than an
1926 object file. This may be a consequence of the manner in
1927 which it handles archives: I think it may load the entire
1928 archive in as separate csects, and then let garbage
1929 collection discard symbols.
1931 We also have to handle the case of statically linking a
1932 shared object, which will cause symbol redefinitions,
1933 although this is an easier case to detect. */
1934 else if (info
->output_bfd
->xvec
== abfd
->xvec
)
1936 if (! bfd_is_und_section (section
))
1937 *sym_hash
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1938 name
, TRUE
, copy
, FALSE
);
1940 /* Make a copy of the symbol name to prevent problems with
1942 *sym_hash
= ((struct xcoff_link_hash_entry
*)
1943 bfd_wrapped_link_hash_lookup (abfd
, info
, name
,
1944 TRUE
, TRUE
, FALSE
));
1946 if (*sym_hash
== NULL
)
1948 if (((*sym_hash
)->root
.type
== bfd_link_hash_defined
1949 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1950 && ! bfd_is_und_section (section
)
1951 && ! bfd_is_com_section (section
))
1953 /* This is a second definition of a defined symbol. */
1954 if (((*sym_hash
)->flags
& XCOFF_DEF_REGULAR
) == 0
1955 && ((*sym_hash
)->flags
& XCOFF_DEF_DYNAMIC
) != 0)
1957 /* The existing symbol is from a shared library.
1959 (*sym_hash
)->root
.type
= bfd_link_hash_undefined
;
1960 (*sym_hash
)->root
.u
.undef
.abfd
=
1961 (*sym_hash
)->root
.u
.def
.section
->owner
;
1963 else if (abfd
->my_archive
!= NULL
)
1965 /* This is a redefinition in an object contained
1966 in an archive. Just ignore it. See the
1968 section
= bfd_und_section_ptr
;
1971 else if (sym
.n_sclass
== C_AIX_WEAKEXT
1972 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1974 /* At least one of the definitions is weak.
1975 Allow the normal rules to take effect. */
1977 else if ((*sym_hash
)->root
.u
.undef
.next
!= NULL
1978 || info
->hash
->undefs_tail
== &(*sym_hash
)->root
)
1980 /* This symbol has been referenced. In this
1981 case, we just continue and permit the
1982 multiple definition error. See the comment
1983 above about the behaviour of the AIX linker. */
1985 else if ((*sym_hash
)->smclas
== aux
.x_csect
.x_smclas
)
1987 /* The symbols are both csects of the same
1988 class. There is at least a chance that this
1989 is a semi-legitimate redefinition. */
1990 section
= bfd_und_section_ptr
;
1992 (*sym_hash
)->flags
|= XCOFF_MULTIPLY_DEFINED
;
1995 else if (((*sym_hash
)->flags
& XCOFF_MULTIPLY_DEFINED
) != 0
1996 && (*sym_hash
)->root
.type
== bfd_link_hash_defined
1997 && (bfd_is_und_section (section
)
1998 || bfd_is_com_section (section
)))
2000 /* This is a reference to a multiply defined symbol.
2001 Report the error now. See the comment above
2002 about the behaviour of the AIX linker. We could
2003 also do this with warning symbols, but I'm not
2004 sure the XCOFF linker is wholly prepared to
2005 handle them, and that would only be a warning,
2007 (*info
->callbacks
->multiple_definition
) (info
,
2011 /* Try not to give this error too many times. */
2012 (*sym_hash
)->flags
&= ~XCOFF_MULTIPLY_DEFINED
;
2016 /* _bfd_generic_link_add_one_symbol may call the linker to
2017 generate an error message, and the linker may try to read
2018 the symbol table to give a good error. Right now, the
2019 line numbers are in an inconsistent state, since they are
2020 counted both in the real sections and in the new csects.
2021 We need to leave the count in the real sections so that
2022 the linker can report the line number of the error
2023 correctly, so temporarily clobber the link to the csects
2024 so that the linker will not try to read the line numbers
2025 a second time from the csects. */
2026 BFD_ASSERT (last_real
->next
== first_csect
);
2027 last_real
->next
= NULL
;
2028 flags
= (sym
.n_sclass
== C_EXT
? BSF_GLOBAL
: BSF_WEAK
);
2029 ok
= (_bfd_generic_link_add_one_symbol
2030 (info
, abfd
, name
, flags
, section
, value
, NULL
, copy
, TRUE
,
2031 (struct bfd_link_hash_entry
**) sym_hash
));
2032 last_real
->next
= first_csect
;
2036 if (smtyp
== XTY_CM
)
2038 if ((*sym_hash
)->root
.type
!= bfd_link_hash_common
2039 || (*sym_hash
)->root
.u
.c
.p
->section
!= csect
)
2040 /* We don't need the common csect we just created. */
2043 (*sym_hash
)->root
.u
.c
.p
->alignment_power
2044 = csect
->alignment_power
;
2047 if (info
->output_bfd
->xvec
== abfd
->xvec
)
2053 || section
== bfd_und_section_ptr
)
2054 flag
= XCOFF_REF_REGULAR
;
2056 flag
= XCOFF_DEF_REGULAR
;
2057 (*sym_hash
)->flags
|= flag
;
2059 if ((*sym_hash
)->smclas
== XMC_UA
2060 || flag
== XCOFF_DEF_REGULAR
)
2061 (*sym_hash
)->smclas
= aux
.x_csect
.x_smclas
;
2065 if (smtyp
== XTY_ER
)
2066 *csect_cache
= section
;
2069 *csect_cache
= csect
;
2071 xcoff_section_data (abfd
, csect
)->last_symndx
2072 = (esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)) / symesz
;
2075 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2076 sym_hash
+= sym
.n_numaux
+ 1;
2077 csect_cache
+= sym
.n_numaux
+ 1;
2078 lineno_counts
+= sym
.n_numaux
+ 1;
2081 BFD_ASSERT (last_real
== NULL
|| last_real
->next
== first_csect
);
2083 /* Make sure that we have seen all the relocs. */
2084 for (o
= abfd
->sections
; o
!= first_csect
; o
= o
->next
)
2086 /* Debugging sections have no csects. */
2087 if (bfd_section_flags (o
) & SEC_DEBUGGING
)
2090 /* Reset the section size and the line number count, since the
2091 data is now attached to the csects. Don't reset the size of
2092 the .debug section, since we need to read it below in
2093 bfd_xcoff_size_dynamic_sections. */
2094 if (strcmp (bfd_section_name (o
), ".debug") != 0)
2096 o
->lineno_count
= 0;
2098 if ((o
->flags
& SEC_RELOC
) != 0)
2101 struct internal_reloc
*rel
;
2102 asection
**rel_csect
;
2104 rel
= reloc_info
[o
->target_index
].relocs
;
2105 rel_csect
= reloc_info
[o
->target_index
].csects
;
2107 for (i
= 0; i
< o
->reloc_count
; i
++, rel
++, rel_csect
++)
2109 if (*rel_csect
== NULL
)
2112 /* xgettext:c-format */
2113 (_("%pB: reloc %s:%" PRId64
" not in csect"),
2114 abfd
, o
->name
, (int64_t) i
);
2115 bfd_set_error (bfd_error_bad_value
);
2119 /* We identify all function symbols that are the target
2120 of a relocation, so that we can create glue code for
2121 functions imported from dynamic objects. */
2122 if (info
->output_bfd
->xvec
== abfd
->xvec
2123 && *rel_csect
!= bfd_und_section_ptr
2124 && obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
] != NULL
)
2126 struct xcoff_link_hash_entry
*h
;
2128 h
= obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
];
2129 /* If the symbol name starts with a period, it is
2130 the code of a function. If the symbol is
2131 currently undefined, then add an undefined symbol
2132 for the function descriptor. This should do no
2133 harm, because any regular object that defines the
2134 function should also define the function
2135 descriptor. It helps, because it means that we
2136 will identify the function descriptor with a
2137 dynamic object if a dynamic object defines it. */
2138 if (h
->root
.root
.string
[0] == '.'
2139 && h
->descriptor
== NULL
)
2141 struct xcoff_link_hash_entry
*hds
;
2142 struct bfd_link_hash_entry
*bh
;
2144 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2145 h
->root
.root
.string
+ 1,
2149 if (hds
->root
.type
== bfd_link_hash_new
)
2152 if (! (_bfd_generic_link_add_one_symbol
2153 (info
, abfd
, hds
->root
.root
.string
,
2154 (flagword
) 0, bfd_und_section_ptr
,
2155 (bfd_vma
) 0, NULL
, FALSE
,
2158 hds
= (struct xcoff_link_hash_entry
*) bh
;
2160 hds
->flags
|= XCOFF_DESCRIPTOR
;
2161 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
2162 hds
->descriptor
= h
;
2163 h
->descriptor
= hds
;
2165 if (h
->root
.root
.string
[0] == '.')
2166 h
->flags
|= XCOFF_CALLED
;
2170 free (reloc_info
[o
->target_index
].csects
);
2171 reloc_info
[o
->target_index
].csects
= NULL
;
2173 /* Reset SEC_RELOC and the reloc_count, since the reloc
2174 information is now attached to the csects. */
2175 o
->flags
&=~ SEC_RELOC
;
2178 /* If we are not keeping memory, free the reloc information. */
2179 if (! info
->keep_memory
2180 && coff_section_data (abfd
, o
) != NULL
2181 && ! coff_section_data (abfd
, o
)->keep_relocs
)
2183 free (coff_section_data (abfd
, o
)->relocs
);
2184 coff_section_data (abfd
, o
)->relocs
= NULL
;
2188 /* Free up the line numbers. FIXME: We could cache these
2189 somewhere for the final link, to avoid reading them again. */
2190 free (reloc_info
[o
->target_index
].linenos
);
2191 reloc_info
[o
->target_index
].linenos
= NULL
;
2196 obj_coff_keep_syms (abfd
) = keep_syms
;
2201 if (reloc_info
!= NULL
)
2203 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2205 free (reloc_info
[o
->target_index
].csects
);
2206 free (reloc_info
[o
->target_index
].linenos
);
2210 obj_coff_keep_syms (abfd
) = keep_syms
;
2217 /* Add symbols from an XCOFF object file. */
2220 xcoff_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2222 if (! _bfd_coff_get_external_symbols (abfd
))
2224 if (! xcoff_link_add_symbols (abfd
, info
))
2226 if (! info
->keep_memory
)
2228 if (! _bfd_coff_free_symbols (abfd
))
2234 /* Look through the loader symbols to see if this dynamic object
2235 should be included in the link. The native linker uses the loader
2236 symbols, not the normal symbol table, so we do too. */
2239 xcoff_link_check_dynamic_ar_symbols (bfd
*abfd
,
2240 struct bfd_link_info
*info
,
2241 bfd_boolean
*pneeded
,
2246 struct internal_ldhdr ldhdr
;
2247 const char *strings
;
2248 bfd_byte
*elsym
, *elsymend
;
2252 lsec
= bfd_get_section_by_name (abfd
, ".loader");
2254 /* There are no symbols, so don't try to include it. */
2257 if (! xcoff_get_section_contents (abfd
, lsec
))
2259 contents
= coff_section_data (abfd
, lsec
)->contents
;
2261 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
2263 strings
= (char *) contents
+ ldhdr
.l_stoff
;
2265 elsym
= contents
+ bfd_xcoff_loader_symbol_offset (abfd
, &ldhdr
);
2267 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz (abfd
);
2268 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz (abfd
))
2270 struct internal_ldsym ldsym
;
2271 char nambuf
[SYMNMLEN
+ 1];
2273 struct bfd_link_hash_entry
*h
;
2275 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
2277 /* We are only interested in exported symbols. */
2278 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
2281 if (ldsym
._l
._l_l
._l_zeroes
== 0)
2282 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
2285 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
2286 nambuf
[SYMNMLEN
] = '\0';
2290 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
2292 /* We are only interested in symbols that are currently
2293 undefined. At this point we know that we are using an XCOFF
2296 && h
->type
== bfd_link_hash_undefined
2297 && (((struct xcoff_link_hash_entry
*) h
)->flags
2298 & XCOFF_DEF_DYNAMIC
) == 0)
2300 if (!(*info
->callbacks
2301 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2308 /* We do not need this shared object. */
2309 if (contents
!= NULL
&& ! coff_section_data (abfd
, lsec
)->keep_contents
)
2311 free (coff_section_data (abfd
, lsec
)->contents
);
2312 coff_section_data (abfd
, lsec
)->contents
= NULL
;
2318 /* Look through the symbols to see if this object file should be
2319 included in the link. */
2322 xcoff_link_check_ar_symbols (bfd
*abfd
,
2323 struct bfd_link_info
*info
,
2324 bfd_boolean
*pneeded
,
2327 bfd_size_type symesz
;
2333 if ((abfd
->flags
& DYNAMIC
) != 0
2334 && ! info
->static_link
2335 && info
->output_bfd
->xvec
== abfd
->xvec
)
2336 return xcoff_link_check_dynamic_ar_symbols (abfd
, info
, pneeded
, subsbfd
);
2338 symesz
= bfd_coff_symesz (abfd
);
2339 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
2340 esym_end
= esym
+ obj_raw_syment_count (abfd
) * symesz
;
2341 while (esym
< esym_end
)
2343 struct internal_syment sym
;
2345 bfd_coff_swap_sym_in (abfd
, (void *) esym
, (void *) &sym
);
2347 if (EXTERN_SYM_P (sym
.n_sclass
) && sym
.n_scnum
!= N_UNDEF
)
2350 char buf
[SYMNMLEN
+ 1];
2351 struct bfd_link_hash_entry
*h
;
2353 /* This symbol is externally visible, and is defined by this
2355 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
2359 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
2361 /* We are only interested in symbols that are currently
2362 undefined. If a symbol is currently known to be common,
2363 XCOFF linkers do not bring in an object file which
2364 defines it. We also don't bring in symbols to satisfy
2365 undefined references in shared objects. */
2367 && h
->type
== bfd_link_hash_undefined
2368 && (info
->output_bfd
->xvec
!= abfd
->xvec
2369 || (((struct xcoff_link_hash_entry
*) h
)->flags
2370 & XCOFF_DEF_DYNAMIC
) == 0))
2372 if (!(*info
->callbacks
2373 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2380 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2383 /* We do not need this object file. */
2387 /* Check a single archive element to see if we need to include it in
2388 the link. *PNEEDED is set according to whether this element is
2389 needed in the link or not. This is called via
2390 _bfd_generic_link_add_archive_symbols. */
2393 xcoff_link_check_archive_element (bfd
*abfd
,
2394 struct bfd_link_info
*info
,
2395 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
2396 const char *name ATTRIBUTE_UNUSED
,
2397 bfd_boolean
*pneeded
)
2399 bfd_boolean keep_syms_p
;
2402 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2403 if (!_bfd_coff_get_external_symbols (abfd
))
2407 if (!xcoff_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
2412 /* Potentially, the add_archive_element hook may have set a
2413 substitute BFD for us. */
2417 && !_bfd_coff_free_symbols (oldbfd
))
2419 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2420 if (!_bfd_coff_get_external_symbols (abfd
))
2423 if (!xcoff_link_add_symbols (abfd
, info
))
2425 if (info
->keep_memory
)
2431 if (!_bfd_coff_free_symbols (abfd
))
2438 /* Given an XCOFF BFD, add symbols to the global hash table as
2442 _bfd_xcoff_bfd_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2444 switch (bfd_get_format (abfd
))
2447 return xcoff_link_add_object_symbols (abfd
, info
);
2450 /* If the archive has a map, do the usual search. We then need
2451 to check the archive for dynamic objects, because they may not
2452 appear in the archive map even though they should, perhaps, be
2453 included. If the archive has no map, we just consider each object
2454 file in turn, since that apparently is what the AIX native linker
2456 if (bfd_has_map (abfd
))
2458 if (! (_bfd_generic_link_add_archive_symbols
2459 (abfd
, info
, xcoff_link_check_archive_element
)))
2466 member
= bfd_openr_next_archived_file (abfd
, NULL
);
2467 while (member
!= NULL
)
2469 if (bfd_check_format (member
, bfd_object
)
2470 && (info
->output_bfd
->xvec
== member
->xvec
)
2471 && (! bfd_has_map (abfd
) || (member
->flags
& DYNAMIC
) != 0))
2475 if (! xcoff_link_check_archive_element (member
, info
,
2476 NULL
, NULL
, &needed
))
2479 member
->archive_pass
= -1;
2481 member
= bfd_openr_next_archived_file (abfd
, member
);
2488 bfd_set_error (bfd_error_wrong_format
);
2494 _bfd_xcoff_define_common_symbol (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2495 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
2496 struct bfd_link_hash_entry
*harg
)
2498 struct xcoff_link_hash_entry
*h
;
2500 if (!bfd_generic_define_common_symbol (output_bfd
, info
, harg
))
2503 h
= (struct xcoff_link_hash_entry
*) harg
;
2504 h
->flags
|= XCOFF_DEF_REGULAR
;
2508 /* If symbol H has not been interpreted as a function descriptor,
2509 see whether it should be. Set up its descriptor information if so. */
2512 xcoff_find_function (struct bfd_link_info
*info
,
2513 struct xcoff_link_hash_entry
*h
)
2515 if ((h
->flags
& XCOFF_DESCRIPTOR
) == 0
2516 && h
->root
.root
.string
[0] != '.')
2519 struct xcoff_link_hash_entry
*hfn
;
2522 amt
= strlen (h
->root
.root
.string
) + 2;
2523 fnname
= bfd_malloc (amt
);
2527 strcpy (fnname
+ 1, h
->root
.root
.string
);
2528 hfn
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2529 fnname
, FALSE
, FALSE
, TRUE
);
2532 && hfn
->smclas
== XMC_PR
2533 && (hfn
->root
.type
== bfd_link_hash_defined
2534 || hfn
->root
.type
== bfd_link_hash_defweak
))
2536 h
->flags
|= XCOFF_DESCRIPTOR
;
2537 h
->descriptor
= hfn
;
2538 hfn
->descriptor
= h
;
2544 /* Return true if the given bfd contains at least one shared object. */
2547 xcoff_archive_contains_shared_object_p (struct bfd_link_info
*info
,
2550 struct xcoff_archive_info
*archive_info
;
2553 archive_info
= xcoff_get_archive_info (info
, archive
);
2554 if (!archive_info
->know_contains_shared_object_p
)
2556 member
= bfd_openr_next_archived_file (archive
, NULL
);
2557 while (member
!= NULL
&& (member
->flags
& DYNAMIC
) == 0)
2558 member
= bfd_openr_next_archived_file (archive
, member
);
2560 archive_info
->contains_shared_object_p
= (member
!= NULL
);
2561 archive_info
->know_contains_shared_object_p
= 1;
2563 return archive_info
->contains_shared_object_p
;
2566 /* Symbol H qualifies for export by -bexpfull. Return true if it also
2567 qualifies for export by -bexpall. */
2570 xcoff_covered_by_expall_p (struct xcoff_link_hash_entry
*h
)
2572 /* Exclude symbols beginning with '_'. */
2573 if (h
->root
.root
.string
[0] == '_')
2576 /* Exclude archive members that would otherwise be unreferenced. */
2577 if ((h
->flags
& XCOFF_MARK
) == 0
2578 && (h
->root
.type
== bfd_link_hash_defined
2579 || h
->root
.type
== bfd_link_hash_defweak
)
2580 && h
->root
.u
.def
.section
->owner
!= NULL
2581 && h
->root
.u
.def
.section
->owner
->my_archive
!= NULL
)
2587 /* Return true if symbol H qualifies for the forms of automatic export
2588 specified by AUTO_EXPORT_FLAGS. */
2591 xcoff_auto_export_p (struct bfd_link_info
*info
,
2592 struct xcoff_link_hash_entry
*h
,
2593 unsigned int auto_export_flags
)
2595 /* Don't automatically export things that were explicitly exported. */
2596 if ((h
->flags
& XCOFF_EXPORT
) != 0)
2599 /* Don't export things that we don't define. */
2600 if ((h
->flags
& XCOFF_DEF_REGULAR
) == 0)
2603 /* Don't export functions; export their descriptors instead. */
2604 if (h
->root
.root
.string
[0] == '.')
2607 /* We don't export a symbol which is being defined by an object
2608 included from an archive which contains a shared object. The
2609 rationale is that if an archive contains both an unshared and
2610 a shared object, then there must be some reason that the
2611 unshared object is unshared, and we don't want to start
2612 providing a shared version of it. In particular, this solves
2613 a bug involving the _savefNN set of functions. gcc will call
2614 those functions without providing a slot to restore the TOC,
2615 so it is essential that these functions be linked in directly
2616 and not from a shared object, which means that a shared
2617 object which also happens to link them in must not export
2618 them. This is confusing, but I haven't been able to think of
2619 a different approach. Note that the symbols can, of course,
2620 be exported explicitly. */
2621 if (h
->root
.type
== bfd_link_hash_defined
2622 || h
->root
.type
== bfd_link_hash_defweak
)
2626 owner
= h
->root
.u
.def
.section
->owner
;
2628 && owner
->my_archive
!= NULL
2629 && xcoff_archive_contains_shared_object_p (info
, owner
->my_archive
))
2633 /* Otherwise, all symbols are exported by -bexpfull. */
2634 if ((auto_export_flags
& XCOFF_EXPFULL
) != 0)
2637 /* Despite its name, -bexpall exports most but not all symbols. */
2638 if ((auto_export_flags
& XCOFF_EXPALL
) != 0
2639 && xcoff_covered_by_expall_p (h
))
2645 /* Return true if relocation REL needs to be copied to the .loader section.
2646 If REL is against a global symbol, H is that symbol, otherwise it
2650 xcoff_need_ldrel_p (struct bfd_link_info
*info
, struct internal_reloc
*rel
,
2651 struct xcoff_link_hash_entry
*h
)
2653 if (!xcoff_hash_table (info
)->loader_section
)
2656 switch (rel
->r_type
)
2663 /* We should never need a .loader reloc for a TOC-relative reloc. */
2667 /* In this case, relocations against defined symbols can be resolved
2670 || h
->root
.type
== bfd_link_hash_defined
2671 || h
->root
.type
== bfd_link_hash_defweak
2672 || h
->root
.type
== bfd_link_hash_common
)
2675 /* We will always provide a local definition of function symbols,
2676 even if we don't have one yet. */
2677 if ((h
->flags
& XCOFF_CALLED
) != 0)
2686 /* Absolute relocations against absolute symbols can be
2687 resolved statically. */
2688 if (h
!= NULL
&& bfd_is_abs_symbol (&h
->root
))
2695 /* Mark a symbol as not being garbage, including the section in which
2698 static inline bfd_boolean
2699 xcoff_mark_symbol (struct bfd_link_info
*info
, struct xcoff_link_hash_entry
*h
)
2701 if ((h
->flags
& XCOFF_MARK
) != 0)
2704 h
->flags
|= XCOFF_MARK
;
2706 /* If we're marking an undefined symbol, try find some way of
2708 if (!bfd_link_relocatable (info
)
2709 && (h
->flags
& XCOFF_IMPORT
) == 0
2710 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
2711 && (h
->root
.type
== bfd_link_hash_undefined
2712 || h
->root
.type
== bfd_link_hash_undefweak
))
2714 /* First check whether this symbol can be interpreted as an
2715 undefined function descriptor for a defined function symbol. */
2716 if (!xcoff_find_function (info
, h
))
2719 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
2720 && (h
->descriptor
->root
.type
== bfd_link_hash_defined
2721 || h
->descriptor
->root
.type
== bfd_link_hash_defweak
))
2723 /* This is a descriptor for a defined symbol, but the input
2724 objects have not defined the descriptor itself. Fill in
2725 the definition automatically.
2727 Note that we do this even if we found a dynamic definition
2728 of H. The local function definition logically overrides
2732 sec
= xcoff_hash_table (info
)->descriptor_section
;
2733 h
->root
.type
= bfd_link_hash_defined
;
2734 h
->root
.u
.def
.section
= sec
;
2735 h
->root
.u
.def
.value
= sec
->size
;
2737 h
->flags
|= XCOFF_DEF_REGULAR
;
2739 /* The size of the function descriptor depends on whether this
2740 is xcoff32 (12) or xcoff64 (24). */
2741 sec
->size
+= bfd_xcoff_function_descriptor_size (sec
->owner
);
2743 /* A function descriptor uses two relocs: one for the
2744 associated code, and one for the TOC address. */
2745 xcoff_hash_table (info
)->ldrel_count
+= 2;
2746 sec
->reloc_count
+= 2;
2748 /* Mark the function itself. */
2749 if (!xcoff_mark_symbol (info
, h
->descriptor
))
2752 /* Mark the TOC section, so that we get an anchor
2753 to relocate against. */
2754 if (!xcoff_mark (info
, xcoff_hash_table (info
)->toc_section
))
2757 /* We handle writing out the contents of the descriptor in
2758 xcoff_write_global_symbol. */
2760 else if (info
->static_link
)
2761 /* We can't get a symbol value dynamically, so just assume
2762 that it's undefined. */
2763 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2764 else if ((h
->flags
& XCOFF_CALLED
) != 0)
2766 /* This is a function symbol for which we need to create
2769 struct xcoff_link_hash_entry
*hds
;
2771 /* Mark the descriptor (and its TOC section). */
2772 hds
= h
->descriptor
;
2773 BFD_ASSERT ((hds
->root
.type
== bfd_link_hash_undefined
2774 || hds
->root
.type
== bfd_link_hash_undefweak
)
2775 && (hds
->flags
& XCOFF_DEF_REGULAR
) == 0);
2776 if (!xcoff_mark_symbol (info
, hds
))
2779 /* Treat this symbol as undefined if the descriptor was. */
2780 if ((hds
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
2781 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2783 /* Allocate room for the global linkage code itself. */
2784 sec
= xcoff_hash_table (info
)->linkage_section
;
2785 h
->root
.type
= bfd_link_hash_defined
;
2786 h
->root
.u
.def
.section
= sec
;
2787 h
->root
.u
.def
.value
= sec
->size
;
2789 h
->flags
|= XCOFF_DEF_REGULAR
;
2790 sec
->size
+= bfd_xcoff_glink_code_size (info
->output_bfd
);
2792 /* The global linkage code requires a TOC entry for the
2794 if (hds
->toc_section
== NULL
)
2799 xcoff32 uses 4 bytes in the toc.
2800 xcoff64 uses 8 bytes in the toc. */
2801 if (bfd_xcoff_is_xcoff64 (info
->output_bfd
))
2803 else if (bfd_xcoff_is_xcoff32 (info
->output_bfd
))
2808 /* Allocate room in the fallback TOC section. */
2809 hds
->toc_section
= xcoff_hash_table (info
)->toc_section
;
2810 hds
->u
.toc_offset
= hds
->toc_section
->size
;
2811 hds
->toc_section
->size
+= byte_size
;
2812 if (!xcoff_mark (info
, hds
->toc_section
))
2815 /* Allocate room for a static and dynamic R_TOC
2817 ++xcoff_hash_table (info
)->ldrel_count
;
2818 ++hds
->toc_section
->reloc_count
;
2820 /* Set the index to -2 to force this symbol to
2823 hds
->flags
|= XCOFF_SET_TOC
| XCOFF_LDREL
;
2826 else if ((h
->flags
& XCOFF_DEF_DYNAMIC
) == 0)
2828 /* Record that the symbol was undefined, then import it.
2829 -brtl links use a special fake import file. */
2830 h
->flags
|= XCOFF_WAS_UNDEFINED
| XCOFF_IMPORT
;
2831 if (xcoff_hash_table (info
)->rtld
)
2833 if (!xcoff_set_import_path (info
, h
, "", "..", ""))
2838 if (!xcoff_set_import_path (info
, h
, NULL
, NULL
, NULL
))
2844 if (h
->root
.type
== bfd_link_hash_defined
2845 || h
->root
.type
== bfd_link_hash_defweak
)
2849 hsec
= h
->root
.u
.def
.section
;
2850 if (! bfd_is_abs_section (hsec
)
2851 && (hsec
->flags
& SEC_MARK
) == 0)
2853 if (! xcoff_mark (info
, hsec
))
2858 if (h
->toc_section
!= NULL
2859 && (h
->toc_section
->flags
& SEC_MARK
) == 0)
2861 if (! xcoff_mark (info
, h
->toc_section
))
2868 /* Look for a symbol called NAME. If the symbol is defined, mark it.
2869 If the symbol exists, set FLAGS. */
2872 xcoff_mark_symbol_by_name (struct bfd_link_info
*info
,
2873 const char *name
, unsigned int flags
)
2875 struct xcoff_link_hash_entry
*h
;
2877 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
,
2878 FALSE
, FALSE
, TRUE
);
2882 if (h
->root
.type
== bfd_link_hash_defined
2883 || h
->root
.type
== bfd_link_hash_defweak
)
2885 if (!xcoff_mark (info
, h
->root
.u
.def
.section
))
2892 /* The mark phase of garbage collection. For a given section, mark
2893 it, and all the sections which define symbols to which it refers.
2894 Because this function needs to look at the relocs, we also count
2895 the number of relocs which need to be copied into the .loader
2899 xcoff_mark (struct bfd_link_info
*info
, asection
*sec
)
2901 if (bfd_is_abs_section (sec
)
2902 || (sec
->flags
& SEC_MARK
) != 0)
2905 sec
->flags
|= SEC_MARK
;
2907 if (sec
->owner
->xvec
== info
->output_bfd
->xvec
2908 && coff_section_data (sec
->owner
, sec
) != NULL
2909 && xcoff_section_data (sec
->owner
, sec
) != NULL
)
2911 struct xcoff_link_hash_entry
**syms
;
2912 struct internal_reloc
*rel
, *relend
;
2914 unsigned long i
, first
, last
;
2916 /* Mark all the symbols in this section. */
2917 syms
= obj_xcoff_sym_hashes (sec
->owner
);
2918 csects
= xcoff_data (sec
->owner
)->csects
;
2919 first
= xcoff_section_data (sec
->owner
, sec
)->first_symndx
;
2920 last
= xcoff_section_data (sec
->owner
, sec
)->last_symndx
;
2921 for (i
= first
; i
<= last
; i
++)
2922 if (csects
[i
] == sec
2924 && (syms
[i
]->flags
& XCOFF_MARK
) == 0)
2926 if (!xcoff_mark_symbol (info
, syms
[i
]))
2930 /* Look through the section relocs. */
2931 if ((sec
->flags
& SEC_RELOC
) != 0
2932 && sec
->reloc_count
> 0)
2934 rel
= xcoff_read_internal_relocs (sec
->owner
, sec
, TRUE
,
2938 relend
= rel
+ sec
->reloc_count
;
2939 for (; rel
< relend
; rel
++)
2941 struct xcoff_link_hash_entry
*h
;
2943 if ((unsigned int) rel
->r_symndx
2944 > obj_raw_syment_count (sec
->owner
))
2947 h
= obj_xcoff_sym_hashes (sec
->owner
)[rel
->r_symndx
];
2950 if ((h
->flags
& XCOFF_MARK
) == 0)
2952 if (!xcoff_mark_symbol (info
, h
))
2960 rsec
= xcoff_data (sec
->owner
)->csects
[rel
->r_symndx
];
2962 && (rsec
->flags
& SEC_MARK
) == 0)
2964 if (!xcoff_mark (info
, rsec
))
2969 /* See if this reloc needs to be copied into the .loader
2971 if (xcoff_need_ldrel_p (info
, rel
, h
))
2973 ++xcoff_hash_table (info
)->ldrel_count
;
2975 h
->flags
|= XCOFF_LDREL
;
2979 if (! info
->keep_memory
2980 && coff_section_data (sec
->owner
, sec
) != NULL
2981 && ! coff_section_data (sec
->owner
, sec
)->keep_relocs
)
2983 free (coff_section_data (sec
->owner
, sec
)->relocs
);
2984 coff_section_data (sec
->owner
, sec
)->relocs
= NULL
;
2992 /* Routines that are called after all the input files have been
2993 handled, but before the sections are laid out in memory. */
2995 /* The sweep phase of garbage collection. Remove all garbage
2999 xcoff_sweep (struct bfd_link_info
*info
)
3003 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3007 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3009 if ((o
->flags
& SEC_MARK
) == 0)
3011 /* Keep all sections from non-XCOFF input files. Keep
3012 special sections. Keep .debug sections for the
3014 if (sub
->xvec
!= info
->output_bfd
->xvec
3015 || o
== xcoff_hash_table (info
)->debug_section
3016 || o
== xcoff_hash_table (info
)->loader_section
3017 || o
== xcoff_hash_table (info
)->linkage_section
3018 || o
== xcoff_hash_table (info
)->descriptor_section
3019 || (bfd_section_flags (o
) & SEC_DEBUGGING
)
3020 || strcmp (o
->name
, ".debug") == 0)
3021 o
->flags
|= SEC_MARK
;
3032 /* Record the number of elements in a set. This is used to output the
3033 correct csect length. */
3036 bfd_xcoff_link_record_set (bfd
*output_bfd
,
3037 struct bfd_link_info
*info
,
3038 struct bfd_link_hash_entry
*harg
,
3041 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3042 struct xcoff_link_size_list
*n
;
3045 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3048 /* This will hardly ever be called. I don't want to burn four bytes
3049 per global symbol, so instead the size is kept on a linked list
3050 attached to the hash table. */
3052 n
= bfd_alloc (output_bfd
, amt
);
3055 n
->next
= xcoff_hash_table (info
)->size_list
;
3058 xcoff_hash_table (info
)->size_list
= n
;
3060 h
->flags
|= XCOFF_HAS_SIZE
;
3065 /* Import a symbol. */
3068 bfd_xcoff_import_symbol (bfd
*output_bfd
,
3069 struct bfd_link_info
*info
,
3070 struct bfd_link_hash_entry
*harg
,
3072 const char *imppath
,
3073 const char *impfile
,
3074 const char *impmember
,
3075 unsigned int syscall_flag
)
3077 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3079 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3082 /* A symbol name which starts with a period is the code for a
3083 function. If the symbol is undefined, then add an undefined
3084 symbol for the function descriptor, and import that instead. */
3085 if (h
->root
.root
.string
[0] == '.'
3086 && h
->root
.type
== bfd_link_hash_undefined
3087 && val
== (bfd_vma
) -1)
3089 struct xcoff_link_hash_entry
*hds
;
3091 hds
= h
->descriptor
;
3094 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3095 h
->root
.root
.string
+ 1,
3099 if (hds
->root
.type
== bfd_link_hash_new
)
3101 hds
->root
.type
= bfd_link_hash_undefined
;
3102 hds
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
3104 hds
->flags
|= XCOFF_DESCRIPTOR
;
3105 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
3106 hds
->descriptor
= h
;
3107 h
->descriptor
= hds
;
3110 /* Now, if the descriptor is undefined, import the descriptor
3111 rather than the symbol we were told to import. FIXME: Is
3112 this correct in all cases? */
3113 if (hds
->root
.type
== bfd_link_hash_undefined
)
3117 h
->flags
|= (XCOFF_IMPORT
| syscall_flag
);
3119 if (val
!= (bfd_vma
) -1)
3121 if (h
->root
.type
== bfd_link_hash_defined
3122 && (!bfd_is_abs_symbol (&h
->root
)
3123 || h
->root
.u
.def
.value
!= val
))
3124 (*info
->callbacks
->multiple_definition
) (info
, &h
->root
, output_bfd
,
3125 bfd_abs_section_ptr
, val
);
3127 h
->root
.type
= bfd_link_hash_defined
;
3128 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
3129 h
->root
.u
.def
.value
= val
;
3133 if (!xcoff_set_import_path (info
, h
, imppath
, impfile
, impmember
))
3139 /* Export a symbol. */
3142 bfd_xcoff_export_symbol (bfd
*output_bfd
,
3143 struct bfd_link_info
*info
,
3144 struct bfd_link_hash_entry
*harg
)
3146 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3148 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3151 h
->flags
|= XCOFF_EXPORT
;
3153 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
3154 I'm just going to ignore it until somebody explains it. */
3156 /* Make sure we don't garbage collect this symbol. */
3157 if (! xcoff_mark_symbol (info
, h
))
3160 /* If this is a function descriptor, make sure we don't garbage
3161 collect the associated function code. We normally don't have to
3162 worry about this, because the descriptor will be attached to a
3163 section with relocs, but if we are creating the descriptor
3164 ourselves those relocs will not be visible to the mark code. */
3165 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3167 if (! xcoff_mark_symbol (info
, h
->descriptor
))
3174 /* Count a reloc against a symbol. This is called for relocs
3175 generated by the linker script, typically for global constructors
3179 bfd_xcoff_link_count_reloc (bfd
*output_bfd
,
3180 struct bfd_link_info
*info
,
3183 struct xcoff_link_hash_entry
*h
;
3185 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3188 h
= ((struct xcoff_link_hash_entry
*)
3189 bfd_wrapped_link_hash_lookup (output_bfd
, info
, name
, FALSE
, FALSE
,
3193 _bfd_error_handler (_("%s: no such symbol"), name
);
3194 bfd_set_error (bfd_error_no_symbols
);
3198 h
->flags
|= XCOFF_REF_REGULAR
;
3199 if (xcoff_hash_table (info
)->loader_section
)
3201 h
->flags
|= XCOFF_LDREL
;
3202 ++xcoff_hash_table (info
)->ldrel_count
;
3205 /* Mark the symbol to avoid garbage collection. */
3206 if (! xcoff_mark_symbol (info
, h
))
3212 /* This function is called for each symbol to which the linker script
3216 bfd_xcoff_record_link_assignment (bfd
*output_bfd
,
3217 struct bfd_link_info
*info
,
3220 struct xcoff_link_hash_entry
*h
;
3222 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3225 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, TRUE
, TRUE
,
3230 h
->flags
|= XCOFF_DEF_REGULAR
;
3235 /* An xcoff_link_hash_traverse callback for which DATA points to an
3236 xcoff_loader_info. Mark all symbols that should be automatically
3240 xcoff_mark_auto_exports (struct xcoff_link_hash_entry
*h
, void *data
)
3242 struct xcoff_loader_info
*ldinfo
;
3244 ldinfo
= (struct xcoff_loader_info
*) data
;
3245 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3247 if (!xcoff_mark_symbol (ldinfo
->info
, h
))
3248 ldinfo
->failed
= TRUE
;
3253 /* Add a symbol to the .loader symbols, if necessary. */
3255 /* INPUT_BFD has an external symbol associated with hash table entry H
3256 and csect CSECT. Return true if INPUT_BFD defines H. */
3259 xcoff_final_definition_p (bfd
*input_bfd
, struct xcoff_link_hash_entry
*h
,
3262 switch (h
->root
.type
)
3264 case bfd_link_hash_defined
:
3265 case bfd_link_hash_defweak
:
3266 /* No input bfd owns absolute symbols. They are written by
3267 xcoff_write_global_symbol instead. */
3268 return (!bfd_is_abs_section (csect
)
3269 && h
->root
.u
.def
.section
== csect
);
3271 case bfd_link_hash_common
:
3272 return h
->root
.u
.c
.p
->section
->owner
== input_bfd
;
3274 case bfd_link_hash_undefined
:
3275 case bfd_link_hash_undefweak
:
3276 /* We can't treat undef.abfd as the owner because that bfd
3277 might be a dynamic object. Allow any bfd to claim it. */
3285 /* See if H should have a loader symbol associated with it. */
3288 xcoff_build_ldsym (struct xcoff_loader_info
*ldinfo
,
3289 struct xcoff_link_hash_entry
*h
)
3293 /* Warn if this symbol is exported but not defined. */
3294 if ((h
->flags
& XCOFF_EXPORT
) != 0
3295 && (h
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
3298 (_("warning: attempt to export undefined symbol `%s'"),
3299 h
->root
.root
.string
);
3303 /* We need to add a symbol to the .loader section if it is mentioned
3304 in a reloc which we are copying to the .loader section and it was
3305 not defined or common, or if it is the entry point, or if it is
3307 if (((h
->flags
& XCOFF_LDREL
) == 0
3308 || h
->root
.type
== bfd_link_hash_defined
3309 || h
->root
.type
== bfd_link_hash_defweak
3310 || h
->root
.type
== bfd_link_hash_common
)
3311 && (h
->flags
& XCOFF_ENTRY
) == 0
3312 && (h
->flags
& XCOFF_EXPORT
) == 0)
3315 /* We need to add this symbol to the .loader symbols. */
3317 BFD_ASSERT (h
->ldsym
== NULL
);
3318 amt
= sizeof (struct internal_ldsym
);
3319 h
->ldsym
= bfd_zalloc (ldinfo
->output_bfd
, amt
);
3320 if (h
->ldsym
== NULL
)
3322 ldinfo
->failed
= TRUE
;
3326 if ((h
->flags
& XCOFF_IMPORT
) != 0)
3328 /* Give imported descriptors class XMC_DS rather than XMC_UA. */
3329 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3331 h
->ldsym
->l_ifile
= h
->ldindx
;
3334 /* The first 3 symbol table indices are reserved to indicate the
3335 data, text and bss sections. */
3336 h
->ldindx
= ldinfo
->ldsym_count
+ 3;
3338 ++ldinfo
->ldsym_count
;
3340 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
->output_bfd
, ldinfo
,
3341 h
->ldsym
, h
->root
.root
.string
))
3344 h
->flags
|= XCOFF_BUILT_LDSYM
;
3348 /* An xcoff_htab_traverse callback that is called for each symbol
3349 once garbage collection is complete. */
3352 xcoff_post_gc_symbol (struct xcoff_link_hash_entry
*h
, void * p
)
3354 struct xcoff_loader_info
*ldinfo
= (struct xcoff_loader_info
*) p
;
3356 /* __rtinit, this symbol has special handling. */
3357 if (h
->flags
& XCOFF_RTINIT
)
3360 /* We don't want to garbage collect symbols which are not defined in
3361 XCOFF files. This is a convenient place to mark them. */
3362 if (xcoff_hash_table (ldinfo
->info
)->gc
3363 && (h
->flags
& XCOFF_MARK
) == 0
3364 && (h
->root
.type
== bfd_link_hash_defined
3365 || h
->root
.type
== bfd_link_hash_defweak
)
3366 && (h
->root
.u
.def
.section
->owner
== NULL
3367 || (h
->root
.u
.def
.section
->owner
->xvec
3368 != ldinfo
->info
->output_bfd
->xvec
)))
3369 h
->flags
|= XCOFF_MARK
;
3371 /* Skip discarded symbols. */
3372 if (xcoff_hash_table (ldinfo
->info
)->gc
3373 && (h
->flags
& XCOFF_MARK
) == 0)
3376 /* If this is still a common symbol, and it wasn't garbage
3377 collected, we need to actually allocate space for it in the .bss
3379 if (h
->root
.type
== bfd_link_hash_common
3380 && h
->root
.u
.c
.p
->section
->size
== 0)
3382 BFD_ASSERT (bfd_is_com_section (h
->root
.u
.c
.p
->section
));
3383 h
->root
.u
.c
.p
->section
->size
= h
->root
.u
.c
.size
;
3386 if (xcoff_hash_table (ldinfo
->info
)->loader_section
)
3388 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3389 h
->flags
|= XCOFF_EXPORT
;
3391 if (!xcoff_build_ldsym (ldinfo
, h
))
3398 /* INPUT_BFD includes XCOFF symbol ISYM, which is associated with linker
3399 hash table entry H and csect CSECT. AUX contains ISYM's auxillary
3400 csect information, if any. NAME is the function's name if the name
3401 is stored in the .debug section, otherwise it is null.
3403 Return 1 if we should include an appropriately-adjusted ISYM
3404 in the output file, 0 if we should discard ISYM, or -1 if an
3408 xcoff_keep_symbol_p (struct bfd_link_info
*info
, bfd
*input_bfd
,
3409 struct internal_syment
*isym
,
3410 union internal_auxent
*aux
,
3411 struct xcoff_link_hash_entry
*h
,
3412 asection
*csect
, const char *name
)
3416 /* If we are skipping this csect, we want to strip the symbol too. */
3420 /* Likewise if we garbage-collected the csect. */
3421 if (xcoff_hash_table (info
)->gc
3422 && !bfd_is_abs_section (csect
)
3423 && !bfd_is_und_section (csect
)
3424 && (csect
->flags
& SEC_MARK
) == 0)
3427 /* An XCOFF linker always removes C_STAT symbols. */
3428 if (isym
->n_sclass
== C_STAT
)
3431 /* We generate the TOC anchor separately. */
3432 if (isym
->n_sclass
== C_HIDEXT
3433 && aux
->x_csect
.x_smclas
== XMC_TC0
)
3436 /* If we are stripping all symbols, we want to discard this one. */
3437 if (info
->strip
== strip_all
)
3440 /* Discard symbols that are defined elsewhere. */
3441 if (EXTERN_SYM_P (isym
->n_sclass
))
3443 if ((h
->flags
& XCOFF_ALLOCATED
) != 0)
3445 if (!xcoff_final_definition_p (input_bfd
, h
, csect
))
3449 /* If we're discarding local symbols, check whether ISYM is local. */
3450 smtyp
= SMTYP_SMTYP (aux
->x_csect
.x_smtyp
);
3451 if (info
->discard
== discard_all
3452 && !EXTERN_SYM_P (isym
->n_sclass
)
3453 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
))
3456 /* If we're stripping debugging symbols, check whether ISYM is one. */
3457 if (info
->strip
== strip_debugger
3458 && isym
->n_scnum
== N_DEBUG
)
3461 /* If we are stripping symbols based on name, check how ISYM's
3462 name should be handled. */
3463 if (info
->strip
== strip_some
3464 || info
->discard
== discard_l
)
3466 char buf
[SYMNMLEN
+ 1];
3470 name
= _bfd_coff_internal_syment_name (input_bfd
, isym
, buf
);
3475 if (info
->strip
== strip_some
3476 && bfd_hash_lookup (info
->keep_hash
, name
, FALSE
, FALSE
) == NULL
)
3479 if (info
->discard
== discard_l
3480 && !EXTERN_SYM_P (isym
->n_sclass
)
3481 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
)
3482 && bfd_is_local_label_name (input_bfd
, name
))
3489 /* Lay out the .loader section, filling in the header and the import paths.
3490 LIBPATH is as for bfd_xcoff_size_dynamic_sections. */
3493 xcoff_build_loader_section (struct xcoff_loader_info
*ldinfo
,
3494 const char *libpath
)
3497 struct xcoff_link_hash_table
*htab
;
3498 struct internal_ldhdr
*ldhdr
;
3499 struct xcoff_import_file
*fl
;
3500 bfd_size_type stoff
;
3501 size_t impsize
, impcount
;
3505 /* Work out the size of the import file names. Each import file ID
3506 consists of three null terminated strings: the path, the file
3507 name, and the archive member name. The first entry in the list
3508 of names is the path to use to find objects, which the linker has
3509 passed in as the libpath argument. For some reason, the path
3510 entry in the other import file names appears to always be empty. */
3511 output_bfd
= ldinfo
->output_bfd
;
3512 htab
= xcoff_hash_table (ldinfo
->info
);
3513 impsize
= strlen (libpath
) + 3;
3515 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3518 impsize
+= (strlen (fl
->path
)
3520 + strlen (fl
->member
)
3524 /* Set up the .loader section header. */
3525 ldhdr
= &htab
->ldhdr
;
3526 ldhdr
->l_version
= bfd_xcoff_ldhdr_version(output_bfd
);
3527 ldhdr
->l_nsyms
= ldinfo
->ldsym_count
;
3528 ldhdr
->l_nreloc
= htab
->ldrel_count
;
3529 ldhdr
->l_istlen
= impsize
;
3530 ldhdr
->l_nimpid
= impcount
;
3531 ldhdr
->l_impoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3532 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
)
3533 + ldhdr
->l_nreloc
* bfd_xcoff_ldrelsz (output_bfd
));
3534 ldhdr
->l_stlen
= ldinfo
->string_size
;
3535 stoff
= ldhdr
->l_impoff
+ impsize
;
3536 if (ldinfo
->string_size
== 0)
3539 ldhdr
->l_stoff
= stoff
;
3541 /* 64 bit elements to ldhdr
3542 The swap out routine for 32 bit will ignore them.
3543 Nothing fancy, symbols come after the header and relocs come
3545 ldhdr
->l_symoff
= bfd_xcoff_ldhdrsz (output_bfd
);
3546 ldhdr
->l_rldoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3547 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
));
3549 /* We now know the final size of the .loader section. Allocate
3551 lsec
= htab
->loader_section
;
3552 lsec
->size
= stoff
+ ldhdr
->l_stlen
;
3553 lsec
->contents
= bfd_zalloc (output_bfd
, lsec
->size
);
3554 if (lsec
->contents
== NULL
)
3557 /* Set up the header. */
3558 bfd_xcoff_swap_ldhdr_out (output_bfd
, ldhdr
, lsec
->contents
);
3560 /* Set up the import file names. */
3561 out
= (char *) lsec
->contents
+ ldhdr
->l_impoff
;
3562 strcpy (out
, libpath
);
3563 out
+= strlen (libpath
) + 1;
3566 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3571 while ((*out
++ = *s
++) != '\0')
3574 while ((*out
++ = *s
++) != '\0')
3577 while ((*out
++ = *s
++) != '\0')
3581 BFD_ASSERT ((bfd_size_type
) ((bfd_byte
*) out
- lsec
->contents
) == stoff
);
3583 /* Set up the symbol string table. */
3584 if (ldinfo
->string_size
> 0)
3586 memcpy (out
, ldinfo
->strings
, ldinfo
->string_size
);
3587 free (ldinfo
->strings
);
3588 ldinfo
->strings
= NULL
;
3591 /* We can't set up the symbol table or the relocs yet, because we
3592 don't yet know the final position of the various sections. The
3593 .loader symbols are written out when the corresponding normal
3594 symbols are written out in xcoff_link_input_bfd or
3595 xcoff_write_global_symbol. The .loader relocs are written out
3596 when the corresponding normal relocs are handled in
3597 xcoff_link_input_bfd. */
3602 /* Build the .loader section. This is called by the XCOFF linker
3603 emulation before_allocation routine. We must set the size of the
3604 .loader section before the linker lays out the output file.
3605 LIBPATH is the library path to search for shared objects; this is
3606 normally built from the -L arguments passed to the linker. ENTRY
3607 is the name of the entry point symbol (the -e linker option).
3608 FILE_ALIGN is the alignment to use for sections within the file
3609 (the -H linker option). MAXSTACK is the maximum stack size (the
3610 -bmaxstack linker option). MAXDATA is the maximum data size (the
3611 -bmaxdata linker option). GC is whether to do garbage collection
3612 (the -bgc linker option). MODTYPE is the module type (the
3613 -bmodtype linker option). TEXTRO is whether the text section must
3614 be read only (the -btextro linker option). AUTO_EXPORT_FLAGS
3615 is a mask of XCOFF_EXPALL and XCOFF_EXPFULL. SPECIAL_SECTIONS
3616 is set by this routine to csects with magic names like _end. */
3619 bfd_xcoff_size_dynamic_sections (bfd
*output_bfd
,
3620 struct bfd_link_info
*info
,
3621 const char *libpath
,
3623 unsigned long file_align
,
3624 unsigned long maxstack
,
3625 unsigned long maxdata
,
3629 unsigned int auto_export_flags
,
3630 asection
**special_sections
,
3633 struct xcoff_loader_info ldinfo
;
3637 struct bfd_strtab_hash
*debug_strtab
;
3638 bfd_byte
*debug_contents
= NULL
;
3641 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3643 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3644 special_sections
[i
] = NULL
;
3648 ldinfo
.failed
= FALSE
;
3649 ldinfo
.output_bfd
= output_bfd
;
3651 ldinfo
.auto_export_flags
= auto_export_flags
;
3652 ldinfo
.ldsym_count
= 0;
3653 ldinfo
.string_size
= 0;
3654 ldinfo
.strings
= NULL
;
3655 ldinfo
.string_alc
= 0;
3657 xcoff_data (output_bfd
)->maxstack
= maxstack
;
3658 xcoff_data (output_bfd
)->maxdata
= maxdata
;
3659 xcoff_data (output_bfd
)->modtype
= modtype
;
3661 xcoff_hash_table (info
)->file_align
= file_align
;
3662 xcoff_hash_table (info
)->textro
= textro
;
3663 xcoff_hash_table (info
)->rtld
= rtld
;
3666 if (xcoff_hash_table (info
)->loader_section
3667 && (info
->init_function
|| info
->fini_function
|| rtld
))
3669 struct xcoff_link_hash_entry
*hsym
;
3670 struct internal_ldsym
*ldsym
;
3672 hsym
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3673 "__rtinit", FALSE
, FALSE
, TRUE
);
3677 (_("error: undefined symbol __rtinit"));
3681 xcoff_mark_symbol (info
, hsym
);
3682 hsym
->flags
|= (XCOFF_DEF_REGULAR
| XCOFF_RTINIT
);
3684 /* __rtinit initialized. */
3685 amt
= sizeof (* ldsym
);
3686 ldsym
= bfd_malloc (amt
);
3688 ldsym
->l_value
= 0; /* Will be filled in later. */
3689 ldsym
->l_scnum
= 2; /* Data section. */
3690 ldsym
->l_smtype
= XTY_SD
; /* Csect section definition. */
3691 ldsym
->l_smclas
= 5; /* .rw. */
3692 ldsym
->l_ifile
= 0; /* Special system loader symbol. */
3693 ldsym
->l_parm
= 0; /* NA. */
3695 /* Force __rtinit to be the first symbol in the loader symbol table
3696 See xcoff_build_ldsyms
3698 The first 3 symbol table indices are reserved to indicate the data,
3699 text and bss sections. */
3700 BFD_ASSERT (0 == ldinfo
.ldsym_count
);
3703 ldinfo
.ldsym_count
= 1;
3704 hsym
->ldsym
= ldsym
;
3706 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
.output_bfd
, &ldinfo
,
3707 hsym
->ldsym
, hsym
->root
.root
.string
))
3710 /* This symbol is written out by xcoff_write_global_symbol
3711 Set stuff up so xcoff_write_global_symbol logic works. */
3712 hsym
->flags
|= XCOFF_DEF_REGULAR
| XCOFF_MARK
;
3713 hsym
->root
.type
= bfd_link_hash_defined
;
3714 hsym
->root
.u
.def
.value
= 0;
3717 /* Garbage collect unused sections. */
3718 if (bfd_link_relocatable (info
) || !gc
)
3721 xcoff_hash_table (info
)->gc
= FALSE
;
3723 /* We still need to call xcoff_mark, in order to set ldrel_count
3725 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3729 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3731 /* We shouldn't unconditionaly mark the TOC section.
3732 The output file should only have a TOC if either
3733 (a) one of the input files did or (b) we end up
3734 creating TOC references as part of the link process. */
3735 if (o
!= xcoff_hash_table (info
)->toc_section
3736 && (o
->flags
& SEC_MARK
) == 0)
3738 if (! xcoff_mark (info
, o
))
3747 && !xcoff_mark_symbol_by_name (info
, entry
, XCOFF_ENTRY
))
3749 if (info
->init_function
!= NULL
3750 && !xcoff_mark_symbol_by_name (info
, info
->init_function
, 0))
3752 if (info
->fini_function
!= NULL
3753 && !xcoff_mark_symbol_by_name (info
, info
->fini_function
, 0))
3755 if (auto_export_flags
!= 0)
3757 xcoff_link_hash_traverse (xcoff_hash_table (info
),
3758 xcoff_mark_auto_exports
, &ldinfo
);
3763 xcoff_hash_table (info
)->gc
= TRUE
;
3766 /* Return special sections to the caller. */
3767 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3769 sec
= xcoff_hash_table (info
)->special_sections
[i
];
3773 && (sec
->flags
& SEC_MARK
) == 0)
3776 special_sections
[i
] = sec
;
3779 if (info
->input_bfds
== NULL
)
3780 /* I'm not sure what to do in this bizarre case. */
3783 xcoff_link_hash_traverse (xcoff_hash_table (info
), xcoff_post_gc_symbol
,
3788 if (xcoff_hash_table (info
)->loader_section
3789 && !xcoff_build_loader_section (&ldinfo
, libpath
))
3792 /* Allocate space for the magic sections. */
3793 sec
= xcoff_hash_table (info
)->linkage_section
;
3796 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3797 if (sec
->contents
== NULL
)
3800 sec
= xcoff_hash_table (info
)->toc_section
;
3803 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3804 if (sec
->contents
== NULL
)
3807 sec
= xcoff_hash_table (info
)->descriptor_section
;
3810 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3811 if (sec
->contents
== NULL
)
3815 /* Now that we've done garbage collection, decide which symbols to keep,
3816 and figure out the contents of the .debug section. */
3817 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
3819 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3822 bfd_size_type symcount
;
3825 unsigned int *lineno_counts
;
3826 struct xcoff_link_hash_entry
**sym_hash
;
3827 bfd_byte
*esym
, *esymend
;
3828 bfd_size_type symesz
;
3830 if (sub
->xvec
!= info
->output_bfd
->xvec
)
3833 if ((sub
->flags
& DYNAMIC
) != 0
3834 && !info
->static_link
)
3837 if (! _bfd_coff_get_external_symbols (sub
))
3840 symcount
= obj_raw_syment_count (sub
);
3841 debug_index
= bfd_zalloc (sub
, symcount
* sizeof (long));
3842 if (debug_index
== NULL
)
3844 xcoff_data (sub
)->debug_indices
= debug_index
;
3846 if (info
->strip
== strip_all
3847 || info
->strip
== strip_debugger
3848 || info
->discard
== discard_all
)
3849 /* We're stripping all debugging information, so there's no need
3850 to read SUB's .debug section. */
3854 /* Grab the contents of SUB's .debug section, if any. */
3855 subdeb
= bfd_get_section_by_name (sub
, ".debug");
3856 if (subdeb
!= NULL
&& subdeb
->size
> 0)
3858 /* We use malloc and copy the names into the debug
3859 stringtab, rather than bfd_alloc, because I expect
3860 that, when linking many files together, many of the
3861 strings will be the same. Storing the strings in the
3862 hash table should save space in this case. */
3863 if (!bfd_malloc_and_get_section (sub
, subdeb
, &debug_contents
))
3868 csectpp
= xcoff_data (sub
)->csects
;
3869 lineno_counts
= xcoff_data (sub
)->lineno_counts
;
3870 sym_hash
= obj_xcoff_sym_hashes (sub
);
3871 symesz
= bfd_coff_symesz (sub
);
3872 esym
= (bfd_byte
*) obj_coff_external_syms (sub
);
3873 esymend
= esym
+ symcount
* symesz
;
3875 while (esym
< esymend
)
3877 struct internal_syment sym
;
3878 union internal_auxent aux
;
3883 bfd_coff_swap_sym_in (sub
, esym
, &sym
);
3885 /* Read in the csect information, if any. */
3886 if (CSECT_SYM_P (sym
.n_sclass
))
3888 BFD_ASSERT (sym
.n_numaux
> 0);
3889 bfd_coff_swap_aux_in (sub
, esym
+ symesz
* sym
.n_numaux
,
3890 sym
.n_type
, sym
.n_sclass
,
3891 sym
.n_numaux
- 1, sym
.n_numaux
, &aux
);
3894 /* If this symbol's name is stored in the debug section,
3895 get a pointer to it. */
3896 if (debug_contents
!= NULL
3897 && sym
._n
._n_n
._n_zeroes
== 0
3898 && bfd_coff_symname_in_debug (sub
, &sym
))
3899 name
= (const char *) debug_contents
+ sym
._n
._n_n
._n_offset
;
3903 /* Decide whether to copy this symbol to the output file. */
3905 keep_p
= xcoff_keep_symbol_p (info
, sub
, &sym
, &aux
,
3906 *sym_hash
, csect
, name
);
3911 /* Use a debug_index of -2 to record that a symbol should
3916 /* See whether we should store the symbol name in the
3917 output .debug section. */
3922 indx
= _bfd_stringtab_add (debug_strtab
, name
, TRUE
, TRUE
);
3923 if (indx
== (bfd_size_type
) -1)
3925 *debug_index
= indx
;
3930 (*sym_hash
)->flags
|= XCOFF_ALLOCATED
;
3931 if (*lineno_counts
> 0)
3932 csect
->output_section
->lineno_count
+= *lineno_counts
;
3935 esym
+= (sym
.n_numaux
+ 1) * symesz
;
3936 csectpp
+= sym
.n_numaux
+ 1;
3937 sym_hash
+= sym
.n_numaux
+ 1;
3938 lineno_counts
+= sym
.n_numaux
+ 1;
3939 debug_index
+= sym
.n_numaux
+ 1;
3944 free (debug_contents
);
3945 debug_contents
= NULL
;
3947 /* Clear the size of subdeb, so that it is not included directly
3948 in the output file. */
3952 if (! info
->keep_memory
)
3954 if (! _bfd_coff_free_symbols (sub
))
3959 if (info
->strip
!= strip_all
)
3960 xcoff_hash_table (info
)->debug_section
->size
=
3961 _bfd_stringtab_size (debug_strtab
);
3966 free (ldinfo
.strings
);
3967 free (debug_contents
);
3972 bfd_xcoff_link_generate_rtinit (bfd
*abfd
,
3977 struct bfd_in_memory
*bim
;
3979 bim
= bfd_malloc ((bfd_size_type
) sizeof (* bim
));
3986 abfd
->link
.next
= 0;
3987 abfd
->format
= bfd_object
;
3988 abfd
->iostream
= (void *) bim
;
3989 abfd
->flags
= BFD_IN_MEMORY
;
3990 abfd
->iovec
= &_bfd_memory_iovec
;
3991 abfd
->direction
= write_direction
;
3995 if (! bfd_xcoff_generate_rtinit (abfd
, init
, fini
, rtld
))
3998 /* need to reset to unknown or it will not be read back in correctly */
3999 abfd
->format
= bfd_unknown
;
4000 abfd
->direction
= read_direction
;
4006 /* Return the section that defines H. Return null if no section does. */
4009 xcoff_symbol_section (struct xcoff_link_hash_entry
*h
)
4011 switch (h
->root
.type
)
4013 case bfd_link_hash_defined
:
4014 case bfd_link_hash_defweak
:
4015 return h
->root
.u
.def
.section
;
4017 case bfd_link_hash_common
:
4018 return h
->root
.u
.c
.p
->section
;
4025 /* Add a .loader relocation for input relocation IREL. If the loader
4026 relocation should be against an output section, HSEC points to the
4027 input section that IREL is against, otherwise HSEC is null. H is the
4028 symbol that IREL is against, or null if it isn't against a global symbol.
4029 REFERENCE_BFD is the bfd to use in error messages about the relocation. */
4032 xcoff_create_ldrel (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
,
4033 asection
*output_section
, bfd
*reference_bfd
,
4034 struct internal_reloc
*irel
, asection
*hsec
,
4035 struct xcoff_link_hash_entry
*h
)
4037 struct internal_ldrel ldrel
;
4039 ldrel
.l_vaddr
= irel
->r_vaddr
;
4042 const char *secname
;
4044 secname
= hsec
->output_section
->name
;
4045 if (strcmp (secname
, ".text") == 0)
4047 else if (strcmp (secname
, ".data") == 0)
4049 else if (strcmp (secname
, ".bss") == 0)
4054 /* xgettext:c-format */
4055 (_("%pB: loader reloc in unrecognized section `%s'"),
4056 reference_bfd
, secname
);
4057 bfd_set_error (bfd_error_nonrepresentable_section
);
4066 /* xgettext:c-format */
4067 (_("%pB: `%s' in loader reloc but not loader sym"),
4068 reference_bfd
, h
->root
.root
.string
);
4069 bfd_set_error (bfd_error_bad_value
);
4072 ldrel
.l_symndx
= h
->ldindx
;
4075 ldrel
.l_symndx
= -(bfd_size_type
) 1;
4077 ldrel
.l_rtype
= (irel
->r_size
<< 8) | irel
->r_type
;
4078 ldrel
.l_rsecnm
= output_section
->target_index
;
4079 if (xcoff_hash_table (flinfo
->info
)->textro
4080 && strcmp (output_section
->name
, ".text") == 0)
4083 /* xgettext:c-format */
4084 (_("%pB: loader reloc in read-only section %pA"),
4085 reference_bfd
, output_section
);
4086 bfd_set_error (bfd_error_invalid_operation
);
4089 bfd_xcoff_swap_ldrel_out (output_bfd
, &ldrel
, flinfo
->ldrel
);
4090 flinfo
->ldrel
+= bfd_xcoff_ldrelsz (output_bfd
);
4094 /* Link an input file into the linker output file. This function
4095 handles all the sections and relocations of the input file at once. */
4098 xcoff_link_input_bfd (struct xcoff_final_link_info
*flinfo
,
4102 const char *strings
;
4103 bfd_size_type syment_base
;
4104 unsigned int n_tmask
;
4105 unsigned int n_btshft
;
4106 bfd_boolean copy
, hash
;
4107 bfd_size_type isymesz
;
4108 bfd_size_type osymesz
;
4109 bfd_size_type linesz
;
4112 struct xcoff_link_hash_entry
**sym_hash
;
4113 struct internal_syment
*isymp
;
4115 unsigned int *lineno_counts
;
4118 unsigned long output_index
;
4122 bfd_boolean keep_syms
;
4125 /* We can just skip DYNAMIC files, unless this is a static link. */
4126 if ((input_bfd
->flags
& DYNAMIC
) != 0
4127 && ! flinfo
->info
->static_link
)
4130 /* Move all the symbols to the output file. */
4131 output_bfd
= flinfo
->output_bfd
;
4133 syment_base
= obj_raw_syment_count (output_bfd
);
4134 isymesz
= bfd_coff_symesz (input_bfd
);
4135 osymesz
= bfd_coff_symesz (output_bfd
);
4136 linesz
= bfd_coff_linesz (input_bfd
);
4137 BFD_ASSERT (linesz
== bfd_coff_linesz (output_bfd
));
4139 n_tmask
= coff_data (input_bfd
)->local_n_tmask
;
4140 n_btshft
= coff_data (input_bfd
)->local_n_btshft
;
4142 /* Define macros so that ISFCN, et. al., macros work correctly. */
4143 #define N_TMASK n_tmask
4144 #define N_BTSHFT n_btshft
4147 if (! flinfo
->info
->keep_memory
)
4150 if (flinfo
->info
->traditional_format
)
4153 if (! _bfd_coff_get_external_symbols (input_bfd
))
4156 /* Make one pass over the symbols and assign indices to symbols that
4157 we have decided to keep. Also use create .loader symbol information
4158 and update information in hash table entries. */
4159 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4160 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4161 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4162 csectpp
= xcoff_data (input_bfd
)->csects
;
4163 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4164 isymp
= flinfo
->internal_syms
;
4165 indexp
= flinfo
->sym_indices
;
4166 output_index
= syment_base
;
4167 while (esym
< esym_end
)
4169 union internal_auxent aux
;
4173 bfd_coff_swap_sym_in (input_bfd
, (void *) esym
, (void *) isymp
);
4175 /* Read in the csect information, if any. */
4176 if (CSECT_SYM_P (isymp
->n_sclass
))
4178 BFD_ASSERT (isymp
->n_numaux
> 0);
4179 bfd_coff_swap_aux_in (input_bfd
,
4180 (void *) (esym
+ isymesz
* isymp
->n_numaux
),
4181 isymp
->n_type
, isymp
->n_sclass
,
4182 isymp
->n_numaux
- 1, isymp
->n_numaux
,
4185 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
4188 /* If this symbol is in the .loader section, swap out the
4189 .loader symbol information. If this is an external symbol
4190 reference to a defined symbol, though, then wait until we get
4191 to the definition. */
4192 if (EXTERN_SYM_P (isymp
->n_sclass
)
4193 && *sym_hash
!= NULL
4194 && (*sym_hash
)->ldsym
!= NULL
4195 && xcoff_final_definition_p (input_bfd
, *sym_hash
, *csectpp
))
4197 struct xcoff_link_hash_entry
*h
;
4198 struct internal_ldsym
*ldsym
;
4202 if (isymp
->n_scnum
> 0)
4204 ldsym
->l_scnum
= (*csectpp
)->output_section
->target_index
;
4205 ldsym
->l_value
= (isymp
->n_value
4206 + (*csectpp
)->output_section
->vma
4207 + (*csectpp
)->output_offset
4212 ldsym
->l_scnum
= isymp
->n_scnum
;
4213 ldsym
->l_value
= isymp
->n_value
;
4216 ldsym
->l_smtype
= smtyp
;
4217 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
4218 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4219 || (h
->flags
& XCOFF_IMPORT
) != 0)
4220 ldsym
->l_smtype
|= L_IMPORT
;
4221 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
4222 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4223 || (h
->flags
& XCOFF_EXPORT
) != 0)
4224 ldsym
->l_smtype
|= L_EXPORT
;
4225 if ((h
->flags
& XCOFF_ENTRY
) != 0)
4226 ldsym
->l_smtype
|= L_ENTRY
;
4227 if (isymp
->n_sclass
== C_AIX_WEAKEXT
)
4228 ldsym
->l_smtype
|= L_WEAK
;
4230 ldsym
->l_smclas
= aux
.x_csect
.x_smclas
;
4232 if (ldsym
->l_ifile
== (bfd_size_type
) -1)
4234 else if (ldsym
->l_ifile
== 0)
4236 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
4242 if (h
->root
.type
== bfd_link_hash_defined
4243 || h
->root
.type
== bfd_link_hash_defweak
)
4244 impbfd
= h
->root
.u
.def
.section
->owner
;
4245 else if (h
->root
.type
== bfd_link_hash_undefined
4246 || h
->root
.type
== bfd_link_hash_undefweak
)
4247 impbfd
= h
->root
.u
.undef
.abfd
;
4255 BFD_ASSERT (impbfd
->xvec
== flinfo
->output_bfd
->xvec
);
4256 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
4263 BFD_ASSERT (h
->ldindx
>= 0);
4264 bfd_xcoff_swap_ldsym_out (flinfo
->output_bfd
, ldsym
,
4267 * bfd_xcoff_ldsymsz (flinfo
->output_bfd
))));
4270 /* Fill in snentry now that we know the target_index. */
4271 if ((h
->flags
& XCOFF_ENTRY
) != 0
4272 && (h
->root
.type
== bfd_link_hash_defined
4273 || h
->root
.type
== bfd_link_hash_defweak
))
4275 xcoff_data (output_bfd
)->snentry
=
4276 h
->root
.u
.def
.section
->output_section
->target_index
;
4280 add
= 1 + isymp
->n_numaux
;
4282 if (*debug_index
== -2)
4283 /* We've decided to strip this symbol. */
4287 /* Assign the next unused index to this symbol. */
4288 *indexp
= output_index
;
4290 if (EXTERN_SYM_P (isymp
->n_sclass
))
4292 BFD_ASSERT (*sym_hash
!= NULL
);
4293 (*sym_hash
)->indx
= output_index
;
4296 /* If this is a symbol in the TOC which we may have merged
4297 (class XMC_TC), remember the symbol index of the TOC
4299 if (isymp
->n_sclass
== C_HIDEXT
4300 && aux
.x_csect
.x_smclas
== XMC_TC
4301 && *sym_hash
!= NULL
)
4303 BFD_ASSERT (((*sym_hash
)->flags
& XCOFF_SET_TOC
) == 0);
4304 BFD_ASSERT ((*sym_hash
)->toc_section
!= NULL
);
4305 (*sym_hash
)->u
.toc_indx
= output_index
;
4308 output_index
+= add
;
4311 esym
+= add
* isymesz
;
4317 for (--add
; add
> 0; --add
)
4321 /* Now write out the symbols that we decided to keep. */
4323 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4324 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4325 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4326 isymp
= flinfo
->internal_syms
;
4327 indexp
= flinfo
->sym_indices
;
4328 csectpp
= xcoff_data (input_bfd
)->csects
;
4329 lineno_counts
= xcoff_data (input_bfd
)->lineno_counts
;
4330 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4331 outsym
= flinfo
->outsyms
;
4334 while (esym
< esym_end
)
4338 add
= 1 + isymp
->n_numaux
;
4341 esym
+= add
* isymesz
;
4344 struct internal_syment isym
;
4347 /* Adjust the symbol in order to output it. */
4349 if (isym
._n
._n_n
._n_zeroes
== 0
4350 && isym
._n
._n_n
._n_offset
!= 0)
4352 /* This symbol has a long name. Enter it in the string
4353 table we are building. If *debug_index != -1, the
4354 name has already been entered in the .debug section. */
4355 if (*debug_index
>= 0)
4356 isym
._n
._n_n
._n_offset
= *debug_index
;
4362 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, NULL
);
4366 indx
= _bfd_stringtab_add (flinfo
->strtab
, name
, hash
, copy
);
4367 if (indx
== (bfd_size_type
) -1)
4369 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
4373 /* Make __rtinit C_HIDEXT rather than C_EXT. This avoids
4374 multiple definition problems when linking a shared object
4375 statically. (The native linker doesn't enter __rtinit into
4376 the normal table at all, but having a local symbol can make
4377 the objdump output easier to read.) */
4378 if (isym
.n_sclass
== C_EXT
4380 && ((*sym_hash
)->flags
& XCOFF_RTINIT
) != 0)
4381 isym
.n_sclass
= C_HIDEXT
;
4383 /* The value of a C_FILE symbol is the symbol index of the
4384 next C_FILE symbol. The value of the last C_FILE symbol
4385 is -1. We try to get this right, below, just before we
4386 write the symbols out, but in the general case we may
4387 have to write the symbol out twice. */
4388 if (isym
.n_sclass
== C_FILE
)
4390 if (flinfo
->last_file_index
!= -1
4391 && flinfo
->last_file
.n_value
!= (bfd_vma
) *indexp
)
4393 /* We must correct the value of the last C_FILE entry. */
4394 flinfo
->last_file
.n_value
= *indexp
;
4395 if ((bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4397 /* The last C_FILE symbol is in this input file. */
4398 bfd_coff_swap_sym_out (output_bfd
,
4399 (void *) &flinfo
->last_file
,
4400 (void *) (flinfo
->outsyms
4401 + ((flinfo
->last_file_index
4407 /* We have already written out the last C_FILE
4408 symbol. We need to write it out again. We
4409 borrow *outsym temporarily. */
4412 bfd_coff_swap_sym_out (output_bfd
,
4413 (void *) &flinfo
->last_file
,
4416 pos
= obj_sym_filepos (output_bfd
);
4417 pos
+= flinfo
->last_file_index
* osymesz
;
4418 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4419 || (bfd_bwrite (outsym
, osymesz
, output_bfd
)
4425 flinfo
->last_file_index
= *indexp
;
4426 flinfo
->last_file
= isym
;
4429 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4430 into the line numbers. We update the symbol values when
4431 we handle the line numbers. */
4432 if (isym
.n_sclass
== C_BINCL
4433 || isym
.n_sclass
== C_EINCL
)
4435 isym
.n_value
= flinfo
->line_filepos
;
4438 /* The value of a C_BSTAT symbol is the symbol table
4439 index of the containing csect. */
4440 else if (isym
.n_sclass
== C_BSTAT
)
4444 indx
= isym
.n_value
;
4445 if (indx
< obj_raw_syment_count (input_bfd
))
4449 symindx
= flinfo
->sym_indices
[indx
];
4453 isym
.n_value
= symindx
;
4456 else if (isym
.n_sclass
!= C_ESTAT
4457 && isym
.n_sclass
!= C_DECL
4458 && isym
.n_scnum
> 0)
4460 isym
.n_scnum
= (*csectpp
)->output_section
->target_index
;
4461 isym
.n_value
+= ((*csectpp
)->output_section
->vma
4462 + (*csectpp
)->output_offset
4466 /* Output the symbol. */
4467 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
4472 for (i
= 0; i
< isymp
->n_numaux
&& esym
< esym_end
; i
++)
4474 union internal_auxent aux
;
4476 bfd_coff_swap_aux_in (input_bfd
, (void *) esym
, isymp
->n_type
,
4477 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4480 if (isymp
->n_sclass
== C_FILE
)
4482 /* This is the file name (or some comment put in by
4483 the compiler). If it is long, we must put it in
4484 the string table. */
4485 if (aux
.x_file
.x_n
.x_zeroes
== 0
4486 && aux
.x_file
.x_n
.x_offset
!= 0)
4488 const char *filename
;
4491 BFD_ASSERT (aux
.x_file
.x_n
.x_offset
4492 >= STRING_SIZE_SIZE
);
4493 if (strings
== NULL
)
4495 strings
= _bfd_coff_read_string_table (input_bfd
);
4496 if (strings
== NULL
)
4499 if ((bfd_size_type
) aux
.x_file
.x_n
.x_offset
>= obj_coff_strings_len (input_bfd
))
4500 filename
= _("<corrupt>");
4502 filename
= strings
+ aux
.x_file
.x_n
.x_offset
;
4503 indx
= _bfd_stringtab_add (flinfo
->strtab
, filename
,
4505 if (indx
== (bfd_size_type
) -1)
4507 aux
.x_file
.x_n
.x_offset
= STRING_SIZE_SIZE
+ indx
;
4510 else if (CSECT_SYM_P (isymp
->n_sclass
)
4511 && i
+ 1 == isymp
->n_numaux
)
4514 /* We don't support type checking. I don't know if
4516 aux
.x_csect
.x_parmhash
= 0;
4517 /* I don't think anybody uses these fields, but we'd
4518 better clobber them just in case. */
4519 aux
.x_csect
.x_stab
= 0;
4520 aux
.x_csect
.x_snstab
= 0;
4522 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_LD
)
4526 indx
= aux
.x_csect
.x_scnlen
.l
;
4527 if (indx
< obj_raw_syment_count (input_bfd
))
4531 symindx
= flinfo
->sym_indices
[indx
];
4534 aux
.x_csect
.x_scnlen
.l
= 0;
4538 aux
.x_csect
.x_scnlen
.l
= symindx
;
4543 else if (isymp
->n_sclass
!= C_STAT
|| isymp
->n_type
!= T_NULL
)
4547 if (ISFCN (isymp
->n_type
)
4548 || ISTAG (isymp
->n_sclass
)
4549 || isymp
->n_sclass
== C_BLOCK
4550 || isymp
->n_sclass
== C_FCN
)
4552 indx
= aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
;
4554 && indx
< obj_raw_syment_count (input_bfd
))
4556 /* We look forward through the symbol for
4557 the index of the next symbol we are going
4558 to include. I don't know if this is
4560 while (flinfo
->sym_indices
[indx
] < 0
4561 && indx
< obj_raw_syment_count (input_bfd
))
4563 if (indx
>= obj_raw_syment_count (input_bfd
))
4564 indx
= output_index
;
4566 indx
= flinfo
->sym_indices
[indx
];
4567 aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
= indx
;
4572 indx
= aux
.x_sym
.x_tagndx
.l
;
4573 if (indx
> 0 && indx
< obj_raw_syment_count (input_bfd
))
4577 symindx
= flinfo
->sym_indices
[indx
];
4579 aux
.x_sym
.x_tagndx
.l
= 0;
4581 aux
.x_sym
.x_tagndx
.l
= symindx
;
4586 /* Copy over the line numbers, unless we are stripping
4587 them. We do this on a symbol by symbol basis in
4588 order to more easily handle garbage collection. */
4589 if (CSECT_SYM_P (isymp
->n_sclass
)
4591 && isymp
->n_numaux
> 1
4592 && ISFCN (isymp
->n_type
)
4593 && aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
4595 if (*lineno_counts
== 0)
4596 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= 0;
4599 asection
*enclosing
;
4600 unsigned int enc_count
;
4601 bfd_signed_vma linoff
;
4602 struct internal_lineno lin
;
4609 /* Read in the enclosing section's line-number
4610 information, if we haven't already. */
4612 enclosing
= xcoff_section_data (abfd
, o
)->enclosing
;
4613 enc_count
= xcoff_section_data (abfd
, o
)->lineno_count
;
4614 if (oline
!= enclosing
)
4616 pos
= enclosing
->line_filepos
;
4617 amt
= linesz
* enc_count
;
4618 if (bfd_seek (input_bfd
, pos
, SEEK_SET
) != 0
4619 || (bfd_bread (flinfo
->linenos
, amt
, input_bfd
)
4625 /* Copy across the first entry, adjusting its
4627 linoff
= (aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
4628 - enclosing
->line_filepos
);
4629 linp
= flinfo
->linenos
+ linoff
;
4630 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4631 lin
.l_addr
.l_symndx
= *indexp
;
4632 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4634 /* Copy the other entries, adjusting their addresses. */
4635 linpend
= linp
+ *lineno_counts
* linesz
;
4636 offset
= (o
->output_section
->vma
4639 for (linp
+= linesz
; linp
< linpend
; linp
+= linesz
)
4641 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4642 lin
.l_addr
.l_paddr
+= offset
;
4643 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4646 /* Write out the entries we've just processed. */
4647 pos
= (o
->output_section
->line_filepos
4648 + o
->output_section
->lineno_count
* linesz
);
4649 amt
= linesz
* *lineno_counts
;
4650 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4651 || bfd_bwrite (flinfo
->linenos
+ linoff
,
4652 amt
, output_bfd
) != amt
)
4654 o
->output_section
->lineno_count
+= *lineno_counts
;
4656 /* Record the offset of the symbol's line numbers
4657 in the output file. */
4658 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= pos
;
4662 struct internal_syment
*iisp
, *iispend
;
4665 bfd_vma range_start
, range_end
;
4668 /* Update any C_BINCL or C_EINCL symbols
4669 that refer to a line number in the
4670 range we just output. */
4671 iisp
= flinfo
->internal_syms
;
4672 iispend
= iisp
+ obj_raw_syment_count (input_bfd
);
4673 iindp
= flinfo
->sym_indices
;
4674 oos
= flinfo
->outsyms
;
4675 range_start
= enclosing
->line_filepos
+ linoff
;
4676 range_end
= range_start
+ *lineno_counts
* linesz
;
4677 while (iisp
< iispend
)
4680 && (iisp
->n_sclass
== C_BINCL
4681 || iisp
->n_sclass
== C_EINCL
)
4682 && iisp
->n_value
>= range_start
4683 && iisp
->n_value
< range_end
)
4685 struct internal_syment iis
;
4687 bfd_coff_swap_sym_in (output_bfd
, oos
, &iis
);
4688 iis
.n_value
= (iisp
->n_value
4691 bfd_coff_swap_sym_out (output_bfd
,
4696 iiadd
= 1 + iisp
->n_numaux
;
4698 oos
+= iiadd
* osymesz
;
4706 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, isymp
->n_type
,
4707 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4718 lineno_counts
+= add
;
4722 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
4723 symbol will be the first symbol in the next input file. In the
4724 normal case, this will save us from writing out the C_FILE symbol
4726 if (flinfo
->last_file_index
!= -1
4727 && (bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4729 flinfo
->last_file
.n_value
= output_index
;
4730 bfd_coff_swap_sym_out (output_bfd
, (void *) &flinfo
->last_file
,
4731 (void *) (flinfo
->outsyms
4732 + ((flinfo
->last_file_index
- syment_base
)
4736 /* Write the modified symbols to the output file. */
4737 if (outsym
> flinfo
->outsyms
)
4739 file_ptr pos
= obj_sym_filepos (output_bfd
) + syment_base
* osymesz
;
4740 bfd_size_type amt
= outsym
- flinfo
->outsyms
;
4741 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4742 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
4745 BFD_ASSERT ((obj_raw_syment_count (output_bfd
)
4746 + (outsym
- flinfo
->outsyms
) / osymesz
)
4749 obj_raw_syment_count (output_bfd
) = output_index
;
4752 /* Don't let the linker relocation routines discard the symbols. */
4753 keep_syms
= obj_coff_keep_syms (input_bfd
);
4754 obj_coff_keep_syms (input_bfd
) = TRUE
;
4756 /* Relocate the contents of each section. */
4757 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4761 if (! o
->linker_mark
)
4762 /* This section was omitted from the link. */
4765 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4767 || (o
->flags
& SEC_IN_MEMORY
) != 0)
4770 /* We have set filepos correctly for the sections we created to
4771 represent csects, so bfd_get_section_contents should work. */
4772 if (coff_section_data (input_bfd
, o
) != NULL
4773 && coff_section_data (input_bfd
, o
)->contents
!= NULL
)
4774 contents
= coff_section_data (input_bfd
, o
)->contents
;
4777 bfd_size_type sz
= o
->rawsize
? o
->rawsize
: o
->size
;
4778 if (!bfd_get_section_contents (input_bfd
, o
, flinfo
->contents
, 0, sz
))
4780 contents
= flinfo
->contents
;
4783 if ((o
->flags
& SEC_RELOC
) != 0)
4786 struct internal_reloc
*internal_relocs
;
4787 struct internal_reloc
*irel
;
4789 struct internal_reloc
*irelend
;
4790 struct xcoff_link_hash_entry
**rel_hash
;
4793 /* Read in the relocs. */
4794 target_index
= o
->output_section
->target_index
;
4795 internal_relocs
= (xcoff_read_internal_relocs
4796 (input_bfd
, o
, FALSE
, flinfo
->external_relocs
,
4798 (flinfo
->section_info
[target_index
].relocs
4799 + o
->output_section
->reloc_count
)));
4800 if (internal_relocs
== NULL
)
4803 /* Call processor specific code to relocate the section
4805 if (! bfd_coff_relocate_section (output_bfd
, flinfo
->info
,
4809 flinfo
->internal_syms
,
4810 xcoff_data (input_bfd
)->csects
))
4813 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
4814 irel
= internal_relocs
;
4815 irelend
= irel
+ o
->reloc_count
;
4816 rel_hash
= (flinfo
->section_info
[target_index
].rel_hashes
4817 + o
->output_section
->reloc_count
);
4818 for (; irel
< irelend
; irel
++, rel_hash
++)
4820 struct xcoff_link_hash_entry
*h
= NULL
;
4824 /* Adjust the reloc address and symbol index. */
4826 irel
->r_vaddr
+= offset
;
4828 r_symndx
= irel
->r_symndx
;
4833 h
= obj_xcoff_sym_hashes (input_bfd
)[r_symndx
];
4835 if (r_symndx
!= -1 && flinfo
->info
->strip
!= strip_all
)
4838 && h
->smclas
!= XMC_TD
4839 && (irel
->r_type
== R_TOC
4840 || irel
->r_type
== R_GL
4841 || irel
->r_type
== R_TCL
4842 || irel
->r_type
== R_TRL
4843 || irel
->r_type
== R_TRLA
))
4845 /* This is a TOC relative reloc with a symbol
4846 attached. The symbol should be the one which
4847 this reloc is for. We want to make this
4848 reloc against the TOC address of the symbol,
4849 not the symbol itself. */
4850 BFD_ASSERT (h
->toc_section
!= NULL
);
4851 BFD_ASSERT ((h
->flags
& XCOFF_SET_TOC
) == 0);
4852 if (h
->u
.toc_indx
!= -1)
4853 irel
->r_symndx
= h
->u
.toc_indx
;
4856 struct xcoff_toc_rel_hash
*n
;
4857 struct xcoff_link_section_info
*si
;
4861 n
= bfd_alloc (flinfo
->output_bfd
, amt
);
4864 si
= flinfo
->section_info
+ target_index
;
4865 n
->next
= si
->toc_rel_hashes
;
4868 si
->toc_rel_hashes
= n
;
4873 /* This is a global symbol. */
4875 irel
->r_symndx
= h
->indx
;
4878 /* This symbol is being written at the end
4879 of the file, and we do not yet know the
4880 symbol index. We save the pointer to the
4881 hash table entry in the rel_hash list.
4882 We set the indx field to -2 to indicate
4883 that this symbol must not be stripped. */
4892 indx
= flinfo
->sym_indices
[r_symndx
];
4896 struct internal_syment
*is
;
4898 /* Relocations against a TC0 TOC anchor are
4899 automatically transformed to be against
4900 the TOC anchor in the output file. */
4901 is
= flinfo
->internal_syms
+ r_symndx
;
4902 if (is
->n_sclass
== C_HIDEXT
4903 && is
->n_numaux
> 0)
4906 union internal_auxent aux
;
4910 obj_coff_external_syms (input_bfd
))
4911 + ((r_symndx
+ is
->n_numaux
)
4913 bfd_coff_swap_aux_in (input_bfd
, auxptr
,
4914 is
->n_type
, is
->n_sclass
,
4918 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_SD
4919 && aux
.x_csect
.x_smclas
== XMC_TC0
)
4920 indx
= flinfo
->toc_symindx
;
4925 irel
->r_symndx
= indx
;
4929 struct internal_syment
*is
;
4932 char buf
[SYMNMLEN
+ 1];
4934 /* This reloc is against a symbol we are
4935 stripping. It would be possible to handle
4936 this case, but I don't think it's worth it. */
4937 is
= flinfo
->internal_syms
+ r_symndx
;
4939 if (is
->n_sclass
!= C_DWARF
)
4941 name
= (_bfd_coff_internal_syment_name
4942 (input_bfd
, is
, buf
));
4947 (*flinfo
->info
->callbacks
->unattached_reloc
)
4948 (flinfo
->info
, name
,
4949 input_bfd
, o
, irel
->r_vaddr
);
4955 if ((o
->flags
& SEC_DEBUGGING
) == 0
4956 && xcoff_need_ldrel_p (flinfo
->info
, irel
, h
))
4963 sec
= xcoff_data (input_bfd
)->csects
[r_symndx
];
4965 sec
= xcoff_symbol_section (h
);
4966 if (!xcoff_create_ldrel (output_bfd
, flinfo
,
4967 o
->output_section
, input_bfd
,
4973 o
->output_section
->reloc_count
+= o
->reloc_count
;
4976 /* Write out the modified section contents. */
4977 if (! bfd_set_section_contents (output_bfd
, o
->output_section
,
4978 contents
, (file_ptr
) o
->output_offset
,
4983 obj_coff_keep_syms (input_bfd
) = keep_syms
;
4985 if (! flinfo
->info
->keep_memory
)
4987 if (! _bfd_coff_free_symbols (input_bfd
))
4994 obj_coff_keep_syms (input_bfd
) = keep_syms
;
5001 /* Sort relocs by VMA. This is called via qsort. */
5004 xcoff_sort_relocs (const void * p1
, const void * p2
)
5006 const struct internal_reloc
*r1
= (const struct internal_reloc
*) p1
;
5007 const struct internal_reloc
*r2
= (const struct internal_reloc
*) p2
;
5009 if (r1
->r_vaddr
> r2
->r_vaddr
)
5011 else if (r1
->r_vaddr
< r2
->r_vaddr
)
5017 /* Return true if section SEC is a TOC section. */
5019 static inline bfd_boolean
5020 xcoff_toc_section_p (asection
*sec
)
5025 if (name
[0] == '.' && name
[1] == 't')
5029 if (name
[3] == '0' && name
[4] == 0)
5034 if (name
[2] == 'd' && name
[3] == 0)
5040 /* See if the link requires a TOC (it usually does!). If so, find a
5041 good place to put the TOC anchor csect, and write out the associated
5045 xcoff_find_tc0 (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
)
5047 bfd_vma toc_start
, toc_end
, start
, end
, best_address
;
5051 struct internal_syment irsym
;
5052 union internal_auxent iraux
;
5056 /* Set [TOC_START, TOC_END) to the range of the TOC. Record the
5057 index of a csect at the beginning of the TOC. */
5058 toc_start
= ~(bfd_vma
) 0;
5061 for (input_bfd
= flinfo
->info
->input_bfds
;
5063 input_bfd
= input_bfd
->link
.next
)
5064 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5065 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5067 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5068 if (toc_start
> start
)
5071 section_index
= sec
->output_section
->target_index
;
5074 end
= start
+ sec
->size
;
5079 /* There's no need for a TC0 symbol if we don't have a TOC. */
5080 if (toc_end
< toc_start
)
5082 xcoff_data (output_bfd
)->toc
= toc_start
;
5086 if (toc_end
- toc_start
< 0x8000)
5087 /* Every TOC csect can be accessed from TOC_START. */
5088 best_address
= toc_start
;
5091 /* Find the lowest TOC csect that is still within range of TOC_END. */
5092 best_address
= toc_end
;
5093 for (input_bfd
= flinfo
->info
->input_bfds
;
5095 input_bfd
= input_bfd
->link
.next
)
5096 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5097 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5099 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5100 if (start
< best_address
5101 && start
+ 0x8000 >= toc_end
)
5103 best_address
= start
;
5104 section_index
= sec
->output_section
->target_index
;
5108 /* Make sure that the start of the TOC is also within range. */
5109 if (best_address
> toc_start
+ 0x8000)
5112 (_("TOC overflow: %#" PRIx64
" > 0x10000; try -mminimal-toc "
5114 (uint64_t) (toc_end
- toc_start
));
5115 bfd_set_error (bfd_error_file_too_big
);
5120 /* Record the chosen TOC value. */
5121 flinfo
->toc_symindx
= obj_raw_syment_count (output_bfd
);
5122 xcoff_data (output_bfd
)->toc
= best_address
;
5123 xcoff_data (output_bfd
)->sntoc
= section_index
;
5125 /* Fill out the TC0 symbol. */
5126 if (!bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5129 irsym
.n_value
= best_address
;
5130 irsym
.n_scnum
= section_index
;
5131 irsym
.n_sclass
= C_HIDEXT
;
5132 irsym
.n_type
= T_NULL
;
5134 bfd_coff_swap_sym_out (output_bfd
, &irsym
, flinfo
->outsyms
);
5136 /* Fill out the auxillary csect information. */
5137 memset (&iraux
, 0, sizeof iraux
);
5138 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5139 iraux
.x_csect
.x_smclas
= XMC_TC0
;
5140 iraux
.x_csect
.x_scnlen
.l
= 0;
5141 bfd_coff_swap_aux_out (output_bfd
, &iraux
, T_NULL
, C_HIDEXT
, 0, 1,
5142 flinfo
->outsyms
+ bfd_coff_symesz (output_bfd
));
5144 /* Write the contents to the file. */
5145 pos
= obj_sym_filepos (output_bfd
);
5146 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5147 size
= 2 * bfd_coff_symesz (output_bfd
);
5148 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5149 || bfd_bwrite (flinfo
->outsyms
, size
, output_bfd
) != size
)
5151 obj_raw_syment_count (output_bfd
) += 2;
5156 /* Write out a non-XCOFF global symbol. */
5159 xcoff_write_global_symbol (struct bfd_hash_entry
*bh
, void * inf
)
5161 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) bh
;
5162 struct xcoff_final_link_info
*flinfo
= (struct xcoff_final_link_info
*) inf
;
5165 struct internal_syment isym
;
5166 union internal_auxent aux
;
5171 output_bfd
= flinfo
->output_bfd
;
5172 outsym
= flinfo
->outsyms
;
5174 if (h
->root
.type
== bfd_link_hash_warning
)
5176 h
= (struct xcoff_link_hash_entry
*) h
->root
.u
.i
.link
;
5177 if (h
->root
.type
== bfd_link_hash_new
)
5181 /* If this symbol was garbage collected, just skip it. */
5182 if (xcoff_hash_table (flinfo
->info
)->gc
5183 && (h
->flags
& XCOFF_MARK
) == 0)
5186 /* If we need a .loader section entry, write it out. */
5187 if (h
->ldsym
!= NULL
)
5189 struct internal_ldsym
*ldsym
;
5194 if (h
->root
.type
== bfd_link_hash_undefined
5195 || h
->root
.type
== bfd_link_hash_undefweak
)
5199 ldsym
->l_scnum
= N_UNDEF
;
5200 ldsym
->l_smtype
= XTY_ER
;
5201 impbfd
= h
->root
.u
.undef
.abfd
;
5204 else if (h
->root
.type
== bfd_link_hash_defined
5205 || h
->root
.type
== bfd_link_hash_defweak
)
5209 sec
= h
->root
.u
.def
.section
;
5210 ldsym
->l_value
= (sec
->output_section
->vma
5211 + sec
->output_offset
5212 + h
->root
.u
.def
.value
);
5213 ldsym
->l_scnum
= sec
->output_section
->target_index
;
5214 ldsym
->l_smtype
= XTY_SD
;
5215 impbfd
= sec
->owner
;
5221 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
5222 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5223 || (h
->flags
& XCOFF_IMPORT
) != 0)
5225 Import symbols are defined so the check above will make
5226 the l_smtype XTY_SD. But this is not correct, it should
5228 ldsym
->l_smtype
|= L_IMPORT
;
5230 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
5231 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5232 || (h
->flags
& XCOFF_EXPORT
) != 0)
5233 ldsym
->l_smtype
|= L_EXPORT
;
5235 if ((h
->flags
& XCOFF_ENTRY
) != 0)
5236 ldsym
->l_smtype
|= L_ENTRY
;
5238 if ((h
->flags
& XCOFF_RTINIT
) != 0)
5239 ldsym
->l_smtype
= XTY_SD
;
5241 ldsym
->l_smclas
= h
->smclas
;
5243 if (ldsym
->l_smtype
& L_IMPORT
)
5245 if ((h
->root
.type
== bfd_link_hash_defined
5246 || h
->root
.type
== bfd_link_hash_defweak
)
5247 && (h
->root
.u
.def
.value
!= 0))
5248 ldsym
->l_smclas
= XMC_XO
;
5250 else if ((h
->flags
& (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
)) ==
5251 (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
))
5252 ldsym
->l_smclas
= XMC_SV3264
;
5254 else if (h
->flags
& XCOFF_SYSCALL32
)
5255 ldsym
->l_smclas
= XMC_SV
;
5257 else if (h
->flags
& XCOFF_SYSCALL64
)
5258 ldsym
->l_smclas
= XMC_SV64
;
5261 if (ldsym
->l_ifile
== -(bfd_size_type
) 1)
5265 else if (ldsym
->l_ifile
== 0)
5267 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
5269 else if (impbfd
== NULL
)
5273 BFD_ASSERT (impbfd
->xvec
== output_bfd
->xvec
);
5274 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
5280 BFD_ASSERT (h
->ldindx
>= 0);
5282 bfd_xcoff_swap_ldsym_out (output_bfd
, ldsym
,
5285 * bfd_xcoff_ldsymsz(flinfo
->output_bfd
)));
5289 /* If this symbol needs global linkage code, write it out. */
5290 if (h
->root
.type
== bfd_link_hash_defined
5291 && (h
->root
.u
.def
.section
5292 == xcoff_hash_table (flinfo
->info
)->linkage_section
))
5298 p
= h
->root
.u
.def
.section
->contents
+ h
->root
.u
.def
.value
;
5300 /* The first instruction in the global linkage code loads a
5301 specific TOC element. */
5302 tocoff
= (h
->descriptor
->toc_section
->output_section
->vma
5303 + h
->descriptor
->toc_section
->output_offset
5304 - xcoff_data (output_bfd
)->toc
);
5306 if ((h
->descriptor
->flags
& XCOFF_SET_TOC
) != 0)
5307 tocoff
+= h
->descriptor
->u
.toc_offset
;
5309 /* The first instruction in the glink code needs to be
5310 cooked to hold the correct offset in the toc. The
5311 rest are just output raw. */
5312 bfd_put_32 (output_bfd
,
5313 bfd_xcoff_glink_code(output_bfd
, 0) | (tocoff
& 0xffff), p
);
5315 /* Start with i == 1 to get past the first instruction done above
5316 The /4 is because the glink code is in bytes and we are going
5318 for (i
= 1; i
< bfd_xcoff_glink_code_size(output_bfd
) / 4; i
++)
5319 bfd_put_32 (output_bfd
,
5320 (bfd_vma
) bfd_xcoff_glink_code(output_bfd
, i
),
5324 /* If we created a TOC entry for this symbol, write out the required
5326 if ((h
->flags
& XCOFF_SET_TOC
) != 0)
5331 struct internal_reloc
*irel
;
5332 struct internal_syment irsym
;
5333 union internal_auxent iraux
;
5335 tocsec
= h
->toc_section
;
5336 osec
= tocsec
->output_section
;
5337 oindx
= osec
->target_index
;
5338 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5339 irel
->r_vaddr
= (osec
->vma
5340 + tocsec
->output_offset
5344 irel
->r_symndx
= h
->indx
;
5348 irel
->r_symndx
= obj_raw_syment_count (output_bfd
);
5351 BFD_ASSERT (h
->ldindx
>= 0);
5353 /* Initialize the aux union here instead of closer to when it is
5354 written out below because the length of the csect depends on
5355 whether the output is 32 or 64 bit. */
5356 memset (&iraux
, 0, sizeof iraux
);
5357 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5358 /* iraux.x_csect.x_scnlen.l = 4 or 8, see below. */
5359 iraux
.x_csect
.x_smclas
= XMC_TC
;
5361 /* 32 bit uses a 32 bit R_POS to do the relocations
5362 64 bit uses a 64 bit R_POS to do the relocations
5364 Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit
5366 Which one is determined by the backend. */
5367 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5370 iraux
.x_csect
.x_scnlen
.l
= 8;
5372 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5375 iraux
.x_csect
.x_scnlen
.l
= 4;
5380 irel
->r_type
= R_POS
;
5381 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5382 ++osec
->reloc_count
;
5384 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5385 output_bfd
, irel
, NULL
, h
))
5388 /* We need to emit a symbol to define a csect which holds
5390 if (flinfo
->info
->strip
!= strip_all
)
5392 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
,
5394 &irsym
, h
->root
.root
.string
);
5398 irsym
.n_value
= irel
->r_vaddr
;
5399 irsym
.n_scnum
= osec
->target_index
;
5400 irsym
.n_sclass
= C_HIDEXT
;
5401 irsym
.n_type
= T_NULL
;
5404 bfd_coff_swap_sym_out (output_bfd
, (void *) &irsym
, (void *) outsym
);
5405 outsym
+= bfd_coff_symesz (output_bfd
);
5407 /* Note : iraux is initialized above. */
5408 bfd_coff_swap_aux_out (output_bfd
, (void *) &iraux
, T_NULL
, C_HIDEXT
,
5409 0, 1, (void *) outsym
);
5410 outsym
+= bfd_coff_auxesz (output_bfd
);
5414 /* We aren't going to write out the symbols below, so we
5415 need to write them out now. */
5416 pos
= obj_sym_filepos (output_bfd
);
5417 pos
+= (obj_raw_syment_count (output_bfd
)
5418 * bfd_coff_symesz (output_bfd
));
5419 amt
= outsym
- flinfo
->outsyms
;
5420 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5421 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5423 obj_raw_syment_count (output_bfd
) +=
5424 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5426 outsym
= flinfo
->outsyms
;
5431 /* If this symbol is a specially defined function descriptor, write
5432 it out. The first word is the address of the function code
5433 itself, the second word is the address of the TOC, and the third
5437 The addresses for the 32 bit will take 4 bytes and the addresses
5438 for 64 bit will take 8 bytes. Similar for the relocs. This type
5439 of logic was also done above to create a TOC entry in
5440 xcoff_write_global_symbol. */
5441 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
5442 && h
->root
.type
== bfd_link_hash_defined
5443 && (h
->root
.u
.def
.section
5444 == xcoff_hash_table (flinfo
->info
)->descriptor_section
))
5450 struct xcoff_link_hash_entry
*hentry
;
5452 struct internal_reloc
*irel
;
5454 unsigned int reloc_size
, byte_size
;
5456 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5461 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5469 sec
= h
->root
.u
.def
.section
;
5470 osec
= sec
->output_section
;
5471 oindx
= osec
->target_index
;
5472 p
= sec
->contents
+ h
->root
.u
.def
.value
;
5474 hentry
= h
->descriptor
;
5475 BFD_ASSERT (hentry
!= NULL
5476 && (hentry
->root
.type
== bfd_link_hash_defined
5477 || hentry
->root
.type
== bfd_link_hash_defweak
));
5478 esec
= hentry
->root
.u
.def
.section
;
5480 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5481 irel
->r_vaddr
= (osec
->vma
5482 + sec
->output_offset
5483 + h
->root
.u
.def
.value
);
5484 irel
->r_symndx
= esec
->output_section
->target_index
;
5485 irel
->r_type
= R_POS
;
5486 irel
->r_size
= reloc_size
;
5487 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5488 ++osec
->reloc_count
;
5490 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5491 output_bfd
, irel
, esec
, NULL
))
5494 /* There are three items to write out,
5495 the address of the code
5496 the address of the toc anchor
5497 the environment pointer.
5498 We are ignoring the environment pointer. So set it to zero. */
5499 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5501 bfd_put_64 (output_bfd
,
5502 (esec
->output_section
->vma
+ esec
->output_offset
5503 + hentry
->root
.u
.def
.value
),
5505 bfd_put_64 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 8);
5506 bfd_put_64 (output_bfd
, (bfd_vma
) 0, p
+ 16);
5511 This logic was already called above so the error case where
5512 the backend is neither has already been checked. */
5513 bfd_put_32 (output_bfd
,
5514 (esec
->output_section
->vma
+ esec
->output_offset
5515 + hentry
->root
.u
.def
.value
),
5517 bfd_put_32 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 4);
5518 bfd_put_32 (output_bfd
, (bfd_vma
) 0, p
+ 8);
5521 tsec
= coff_section_from_bfd_index (output_bfd
,
5522 xcoff_data (output_bfd
)->sntoc
);
5525 irel
->r_vaddr
= (osec
->vma
5526 + sec
->output_offset
5527 + h
->root
.u
.def
.value
5529 irel
->r_symndx
= tsec
->output_section
->target_index
;
5530 irel
->r_type
= R_POS
;
5531 irel
->r_size
= reloc_size
;
5532 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5533 ++osec
->reloc_count
;
5535 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5536 output_bfd
, irel
, tsec
, NULL
))
5540 if (h
->indx
>= 0 || flinfo
->info
->strip
== strip_all
)
5542 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5547 && (flinfo
->info
->strip
== strip_all
5548 || (flinfo
->info
->strip
== strip_some
5549 && bfd_hash_lookup (flinfo
->info
->keep_hash
, h
->root
.root
.string
,
5550 FALSE
, FALSE
) == NULL
)))
5552 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5557 && (h
->flags
& (XCOFF_REF_REGULAR
| XCOFF_DEF_REGULAR
)) == 0)
5559 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5563 memset (&aux
, 0, sizeof aux
);
5565 h
->indx
= obj_raw_syment_count (output_bfd
);
5567 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5568 &isym
, h
->root
.root
.string
);
5572 if (h
->root
.type
== bfd_link_hash_undefined
5573 || h
->root
.type
== bfd_link_hash_undefweak
)
5576 isym
.n_scnum
= N_UNDEF
;
5577 if (h
->root
.type
== bfd_link_hash_undefweak
5578 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5579 isym
.n_sclass
= C_WEAKEXT
;
5581 isym
.n_sclass
= C_EXT
;
5582 aux
.x_csect
.x_smtyp
= XTY_ER
;
5584 else if ((h
->root
.type
== bfd_link_hash_defined
5585 || h
->root
.type
== bfd_link_hash_defweak
)
5586 && h
->smclas
== XMC_XO
)
5588 BFD_ASSERT (bfd_is_abs_symbol (&h
->root
));
5589 isym
.n_value
= h
->root
.u
.def
.value
;
5590 isym
.n_scnum
= N_UNDEF
;
5591 if (h
->root
.type
== bfd_link_hash_defweak
5592 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5593 isym
.n_sclass
= C_WEAKEXT
;
5595 isym
.n_sclass
= C_EXT
;
5596 aux
.x_csect
.x_smtyp
= XTY_ER
;
5598 else if (h
->root
.type
== bfd_link_hash_defined
5599 || h
->root
.type
== bfd_link_hash_defweak
)
5601 struct xcoff_link_size_list
*l
;
5603 isym
.n_value
= (h
->root
.u
.def
.section
->output_section
->vma
5604 + h
->root
.u
.def
.section
->output_offset
5605 + h
->root
.u
.def
.value
);
5606 if (bfd_is_abs_section (h
->root
.u
.def
.section
->output_section
))
5607 isym
.n_scnum
= N_ABS
;
5609 isym
.n_scnum
= h
->root
.u
.def
.section
->output_section
->target_index
;
5610 isym
.n_sclass
= C_HIDEXT
;
5611 aux
.x_csect
.x_smtyp
= XTY_SD
;
5613 if ((h
->flags
& XCOFF_HAS_SIZE
) != 0)
5615 for (l
= xcoff_hash_table (flinfo
->info
)->size_list
;
5621 aux
.x_csect
.x_scnlen
.l
= l
->size
;
5627 else if (h
->root
.type
== bfd_link_hash_common
)
5629 isym
.n_value
= (h
->root
.u
.c
.p
->section
->output_section
->vma
5630 + h
->root
.u
.c
.p
->section
->output_offset
);
5631 isym
.n_scnum
= h
->root
.u
.c
.p
->section
->output_section
->target_index
;
5632 isym
.n_sclass
= C_EXT
;
5633 aux
.x_csect
.x_smtyp
= XTY_CM
;
5634 aux
.x_csect
.x_scnlen
.l
= h
->root
.u
.c
.size
;
5639 isym
.n_type
= T_NULL
;
5642 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5643 outsym
+= bfd_coff_symesz (output_bfd
);
5645 aux
.x_csect
.x_smclas
= h
->smclas
;
5646 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, isym
.n_sclass
, 0, 1,
5648 outsym
+= bfd_coff_auxesz (output_bfd
);
5650 if ((h
->root
.type
== bfd_link_hash_defined
5651 || h
->root
.type
== bfd_link_hash_defweak
)
5652 && h
->smclas
!= XMC_XO
)
5654 /* We just output an SD symbol. Now output an LD symbol. */
5657 if (h
->root
.type
== bfd_link_hash_defweak
5658 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5659 isym
.n_sclass
= C_WEAKEXT
;
5661 isym
.n_sclass
= C_EXT
;
5662 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5663 outsym
+= bfd_coff_symesz (output_bfd
);
5665 aux
.x_csect
.x_smtyp
= XTY_LD
;
5666 aux
.x_csect
.x_scnlen
.l
= obj_raw_syment_count (output_bfd
);
5667 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, C_EXT
, 0, 1,
5669 outsym
+= bfd_coff_auxesz (output_bfd
);
5672 pos
= obj_sym_filepos (output_bfd
);
5673 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5674 amt
= outsym
- flinfo
->outsyms
;
5675 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5676 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5678 obj_raw_syment_count (output_bfd
) +=
5679 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5684 /* Handle a link order which is supposed to generate a reloc. */
5687 xcoff_reloc_link_order (bfd
*output_bfd
,
5688 struct xcoff_final_link_info
*flinfo
,
5689 asection
*output_section
,
5690 struct bfd_link_order
*link_order
)
5692 reloc_howto_type
*howto
;
5693 struct xcoff_link_hash_entry
*h
;
5697 struct internal_reloc
*irel
;
5698 struct xcoff_link_hash_entry
**rel_hash_ptr
;
5700 if (link_order
->type
== bfd_section_reloc_link_order
)
5701 /* We need to somehow locate a symbol in the right section. The
5702 symbol must either have a value of zero, or we must adjust
5703 the addend by the value of the symbol. FIXME: Write this
5704 when we need it. The old linker couldn't handle this anyhow. */
5707 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5710 bfd_set_error (bfd_error_bad_value
);
5714 h
= ((struct xcoff_link_hash_entry
*)
5715 bfd_wrapped_link_hash_lookup (output_bfd
, flinfo
->info
,
5716 link_order
->u
.reloc
.p
->u
.name
,
5717 FALSE
, FALSE
, TRUE
));
5720 (*flinfo
->info
->callbacks
->unattached_reloc
)
5721 (flinfo
->info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
5725 hsec
= xcoff_symbol_section (h
);
5726 if (h
->root
.type
== bfd_link_hash_defined
5727 || h
->root
.type
== bfd_link_hash_defweak
)
5728 hval
= h
->root
.u
.def
.value
;
5732 addend
= link_order
->u
.reloc
.p
->addend
;
5734 addend
+= (hsec
->output_section
->vma
5735 + hsec
->output_offset
5742 bfd_reloc_status_type rstat
;
5745 size
= bfd_get_reloc_size (howto
);
5746 buf
= bfd_zmalloc (size
);
5747 if (buf
== NULL
&& size
!= 0)
5750 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5756 case bfd_reloc_outofrange
:
5758 case bfd_reloc_overflow
:
5759 (*flinfo
->info
->callbacks
->reloc_overflow
)
5760 (flinfo
->info
, NULL
, link_order
->u
.reloc
.p
->u
.name
,
5761 howto
->name
, addend
, NULL
, NULL
, (bfd_vma
) 0);
5764 ok
= bfd_set_section_contents (output_bfd
, output_section
, (void *) buf
,
5765 (file_ptr
) link_order
->offset
, size
);
5771 /* Store the reloc information in the right place. It will get
5772 swapped and written out at the end of the final_link routine. */
5773 irel
= (flinfo
->section_info
[output_section
->target_index
].relocs
5774 + output_section
->reloc_count
);
5775 rel_hash_ptr
= (flinfo
->section_info
[output_section
->target_index
].rel_hashes
5776 + output_section
->reloc_count
);
5778 memset (irel
, 0, sizeof (struct internal_reloc
));
5779 *rel_hash_ptr
= NULL
;
5781 irel
->r_vaddr
= output_section
->vma
+ link_order
->offset
;
5784 irel
->r_symndx
= h
->indx
;
5787 /* Set the index to -2 to force this symbol to get written out. */
5793 irel
->r_type
= howto
->type
;
5794 irel
->r_size
= howto
->bitsize
- 1;
5795 if (howto
->complain_on_overflow
== complain_overflow_signed
)
5796 irel
->r_size
|= 0x80;
5798 ++output_section
->reloc_count
;
5800 /* Now output the reloc to the .loader section. */
5801 if (xcoff_hash_table (flinfo
->info
)->loader_section
)
5803 if (!xcoff_create_ldrel (output_bfd
, flinfo
, output_section
,
5804 output_bfd
, irel
, hsec
, h
))
5811 /* Do the final link step. */
5814 _bfd_xcoff_bfd_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5816 bfd_size_type symesz
;
5817 struct xcoff_final_link_info flinfo
;
5819 struct bfd_link_order
*p
;
5820 bfd_size_type max_contents_size
;
5821 bfd_size_type max_sym_count
;
5822 bfd_size_type max_lineno_count
;
5823 bfd_size_type max_reloc_count
;
5824 bfd_size_type max_output_reloc_count
;
5825 file_ptr rel_filepos
;
5827 file_ptr line_filepos
;
5828 unsigned int linesz
;
5830 bfd_byte
*external_relocs
= NULL
;
5831 char strbuf
[STRING_SIZE_SIZE
];
5835 if (bfd_link_pic (info
))
5836 abfd
->flags
|= DYNAMIC
;
5838 symesz
= bfd_coff_symesz (abfd
);
5841 flinfo
.output_bfd
= abfd
;
5842 flinfo
.strtab
= NULL
;
5843 flinfo
.section_info
= NULL
;
5844 flinfo
.last_file_index
= -1;
5845 flinfo
.toc_symindx
= -1;
5846 flinfo
.internal_syms
= NULL
;
5847 flinfo
.sym_indices
= NULL
;
5848 flinfo
.outsyms
= NULL
;
5849 flinfo
.linenos
= NULL
;
5850 flinfo
.contents
= NULL
;
5851 flinfo
.external_relocs
= NULL
;
5853 if (xcoff_hash_table (info
)->loader_section
)
5855 flinfo
.ldsym
= (xcoff_hash_table (info
)->loader_section
->contents
5856 + bfd_xcoff_ldhdrsz (abfd
));
5857 flinfo
.ldrel
= (xcoff_hash_table (info
)->loader_section
->contents
5858 + bfd_xcoff_ldhdrsz (abfd
)
5859 + (xcoff_hash_table (info
)->ldhdr
.l_nsyms
5860 * bfd_xcoff_ldsymsz (abfd
)));
5864 flinfo
.ldsym
= NULL
;
5865 flinfo
.ldrel
= NULL
;
5868 xcoff_data (abfd
)->coff
.link_info
= info
;
5870 flinfo
.strtab
= _bfd_stringtab_init ();
5871 if (flinfo
.strtab
== NULL
)
5874 /* Count the relocation entries required for the output file.
5875 (We've already counted the line numbers.) Determine a few
5877 max_contents_size
= 0;
5878 max_lineno_count
= 0;
5879 max_reloc_count
= 0;
5880 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5883 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5885 if (p
->type
== bfd_indirect_link_order
)
5889 sec
= p
->u
.indirect
.section
;
5891 /* Mark all sections which are to be included in the
5892 link. This will normally be every section. We need
5893 to do this so that we can identify any sections which
5894 the linker has decided to not include. */
5895 sec
->linker_mark
= TRUE
;
5897 o
->reloc_count
+= sec
->reloc_count
;
5899 if ((sec
->flags
& SEC_IN_MEMORY
) == 0)
5901 if (sec
->rawsize
> max_contents_size
)
5902 max_contents_size
= sec
->rawsize
;
5903 if (sec
->size
> max_contents_size
)
5904 max_contents_size
= sec
->size
;
5906 if (coff_section_data (sec
->owner
, sec
) != NULL
5907 && xcoff_section_data (sec
->owner
, sec
) != NULL
5908 && (xcoff_section_data (sec
->owner
, sec
)->lineno_count
5909 > max_lineno_count
))
5911 xcoff_section_data (sec
->owner
, sec
)->lineno_count
;
5912 if (sec
->reloc_count
> max_reloc_count
)
5913 max_reloc_count
= sec
->reloc_count
;
5915 else if (p
->type
== bfd_section_reloc_link_order
5916 || p
->type
== bfd_symbol_reloc_link_order
)
5921 /* Compute the file positions for all the sections. */
5922 if (abfd
->output_has_begun
)
5924 if (xcoff_hash_table (info
)->file_align
!= 0)
5931 file_align
= xcoff_hash_table (info
)->file_align
;
5932 if (file_align
!= 0)
5934 bfd_boolean saw_contents
;
5938 /* Insert .pad sections before every section which has
5939 contents and is loaded, if it is preceded by some other
5940 section which has contents and is loaded. */
5941 saw_contents
= TRUE
;
5942 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5944 if (strcmp (o
->name
, ".pad") == 0)
5945 saw_contents
= FALSE
;
5946 else if ((o
->flags
& SEC_HAS_CONTENTS
) != 0
5947 && (o
->flags
& SEC_LOAD
) != 0)
5950 saw_contents
= TRUE
;
5955 /* Create a pad section and place it before the section
5956 that needs padding. This requires unlinking and
5957 relinking the bfd's section list. */
5959 n
= bfd_make_section_anyway_with_flags (abfd
, ".pad",
5961 n
->alignment_power
= 0;
5963 bfd_section_list_remove (abfd
, n
);
5964 bfd_section_list_insert_before (abfd
, o
, n
);
5965 saw_contents
= FALSE
;
5970 /* Reset the section indices after inserting the new
5973 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5976 o
->target_index
= indx
;
5978 BFD_ASSERT ((unsigned int) indx
== abfd
->section_count
);
5980 /* Work out appropriate sizes for the .pad sections to force
5981 each section to land on a page boundary. This bit of
5982 code knows what compute_section_file_positions is going
5984 sofar
= bfd_coff_filhsz (abfd
);
5985 sofar
+= bfd_coff_aoutsz (abfd
);
5986 sofar
+= abfd
->section_count
* bfd_coff_scnhsz (abfd
);
5987 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5988 if ((bfd_xcoff_is_reloc_count_overflow
5989 (abfd
, (bfd_vma
) o
->reloc_count
))
5990 || (bfd_xcoff_is_lineno_count_overflow
5991 (abfd
, (bfd_vma
) o
->lineno_count
)))
5992 /* 64 does not overflow, need to check if 32 does */
5993 sofar
+= bfd_coff_scnhsz (abfd
);
5995 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5997 if (strcmp (o
->name
, ".pad") == 0)
6001 BFD_ASSERT (o
->size
== 0);
6002 pageoff
= sofar
& (file_align
- 1);
6005 o
->size
= file_align
- pageoff
;
6006 sofar
+= file_align
- pageoff
;
6007 o
->flags
|= SEC_HAS_CONTENTS
;
6012 if ((o
->flags
& SEC_HAS_CONTENTS
) != 0)
6013 sofar
+= BFD_ALIGN (o
->size
,
6014 1 << o
->alignment_power
);
6019 if (! bfd_coff_compute_section_file_positions (abfd
))
6023 /* Allocate space for the pointers we need to keep for the relocs. */
6027 /* We use section_count + 1, rather than section_count, because
6028 the target_index fields are 1 based. */
6029 amt
= abfd
->section_count
+ 1;
6030 amt
*= sizeof (struct xcoff_link_section_info
);
6031 flinfo
.section_info
= bfd_malloc (amt
);
6032 if (flinfo
.section_info
== NULL
)
6034 for (i
= 0; i
<= abfd
->section_count
; i
++)
6036 flinfo
.section_info
[i
].relocs
= NULL
;
6037 flinfo
.section_info
[i
].rel_hashes
= NULL
;
6038 flinfo
.section_info
[i
].toc_rel_hashes
= NULL
;
6042 /* Set the file positions for the relocs. */
6043 rel_filepos
= obj_relocbase (abfd
);
6044 relsz
= bfd_coff_relsz (abfd
);
6045 max_output_reloc_count
= 0;
6046 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6048 if (o
->reloc_count
== 0)
6052 /* A stripped file has no relocs. However, we still
6053 allocate the buffers, so that later code doesn't have to
6054 worry about whether we are stripping or not. */
6055 if (info
->strip
== strip_all
)
6059 o
->flags
|= SEC_RELOC
;
6060 o
->rel_filepos
= rel_filepos
;
6061 rel_filepos
+= o
->reloc_count
* relsz
;
6064 /* We don't know the indices of global symbols until we have
6065 written out all the local symbols. For each section in
6066 the output file, we keep an array of pointers to hash
6067 table entries. Each entry in the array corresponds to a
6068 reloc. When we find a reloc against a global symbol, we
6069 set the corresponding entry in this array so that we can
6070 fix up the symbol index after we have written out all the
6073 Because of this problem, we also keep the relocs in
6074 memory until the end of the link. This wastes memory.
6075 We could backpatch the file later, I suppose, although it
6077 amt
= o
->reloc_count
;
6078 amt
*= sizeof (struct internal_reloc
);
6079 flinfo
.section_info
[o
->target_index
].relocs
= bfd_malloc (amt
);
6081 amt
= o
->reloc_count
;
6082 amt
*= sizeof (struct xcoff_link_hash_entry
*);
6083 flinfo
.section_info
[o
->target_index
].rel_hashes
= bfd_malloc (amt
);
6085 if (flinfo
.section_info
[o
->target_index
].relocs
== NULL
6086 || flinfo
.section_info
[o
->target_index
].rel_hashes
== NULL
)
6089 if (o
->reloc_count
> max_output_reloc_count
)
6090 max_output_reloc_count
= o
->reloc_count
;
6094 /* We now know the size of the relocs, so we can determine the file
6095 positions of the line numbers. */
6096 line_filepos
= rel_filepos
;
6097 flinfo
.line_filepos
= line_filepos
;
6098 linesz
= bfd_coff_linesz (abfd
);
6099 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6101 if (o
->lineno_count
== 0)
6102 o
->line_filepos
= 0;
6105 o
->line_filepos
= line_filepos
;
6106 line_filepos
+= o
->lineno_count
* linesz
;
6109 /* Reset the reloc and lineno counts, so that we can use them to
6110 count the number of entries we have output so far. */
6112 o
->lineno_count
= 0;
6115 obj_sym_filepos (abfd
) = line_filepos
;
6117 /* Figure out the largest number of symbols in an input BFD. Take
6118 the opportunity to clear the output_has_begun fields of all the
6119 input BFD's. We want at least 6 symbols, since that is the
6120 number which xcoff_write_global_symbol may need. */
6122 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
6126 sub
->output_has_begun
= FALSE
;
6127 sz
= obj_raw_syment_count (sub
);
6128 if (sz
> max_sym_count
)
6132 /* Allocate some buffers used while linking. */
6133 amt
= max_sym_count
* sizeof (struct internal_syment
);
6134 flinfo
.internal_syms
= bfd_malloc (amt
);
6136 amt
= max_sym_count
* sizeof (long);
6137 flinfo
.sym_indices
= bfd_malloc (amt
);
6139 amt
= (max_sym_count
+ 1) * symesz
;
6140 flinfo
.outsyms
= bfd_malloc (amt
);
6142 amt
= max_lineno_count
* bfd_coff_linesz (abfd
);
6143 flinfo
.linenos
= bfd_malloc (amt
);
6145 amt
= max_contents_size
;
6146 flinfo
.contents
= bfd_malloc (amt
);
6148 amt
= max_reloc_count
* relsz
;
6149 flinfo
.external_relocs
= bfd_malloc (amt
);
6151 if ((flinfo
.internal_syms
== NULL
&& max_sym_count
> 0)
6152 || (flinfo
.sym_indices
== NULL
&& max_sym_count
> 0)
6153 || flinfo
.outsyms
== NULL
6154 || (flinfo
.linenos
== NULL
&& max_lineno_count
> 0)
6155 || (flinfo
.contents
== NULL
&& max_contents_size
> 0)
6156 || (flinfo
.external_relocs
== NULL
&& max_reloc_count
> 0))
6159 obj_raw_syment_count (abfd
) = 0;
6161 /* Find a TOC symbol, if we need one. */
6162 if (!xcoff_find_tc0 (abfd
, &flinfo
))
6165 /* We now know the position of everything in the file, except that
6166 we don't know the size of the symbol table and therefore we don't
6167 know where the string table starts. We just build the string
6168 table in memory as we go along. We process all the relocations
6169 for a single input file at once. */
6170 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6172 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
6174 if (p
->type
== bfd_indirect_link_order
6175 && p
->u
.indirect
.section
->owner
->xvec
== abfd
->xvec
)
6177 sub
= p
->u
.indirect
.section
->owner
;
6178 if (! sub
->output_has_begun
)
6180 if (! xcoff_link_input_bfd (&flinfo
, sub
))
6182 sub
->output_has_begun
= TRUE
;
6185 else if (p
->type
== bfd_section_reloc_link_order
6186 || p
->type
== bfd_symbol_reloc_link_order
)
6188 if (! xcoff_reloc_link_order (abfd
, &flinfo
, o
, p
))
6193 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
6199 /* Free up the buffers used by xcoff_link_input_bfd. */
6200 free (flinfo
.internal_syms
);
6201 flinfo
.internal_syms
= NULL
;
6202 free (flinfo
.sym_indices
);
6203 flinfo
.sym_indices
= NULL
;
6204 free (flinfo
.linenos
);
6205 flinfo
.linenos
= NULL
;
6206 free (flinfo
.contents
);
6207 flinfo
.contents
= NULL
;
6208 free (flinfo
.external_relocs
);
6209 flinfo
.external_relocs
= NULL
;
6211 /* The value of the last C_FILE symbol is supposed to be -1. Write
6213 if (flinfo
.last_file_index
!= -1)
6215 flinfo
.last_file
.n_value
= -(bfd_vma
) 1;
6216 bfd_coff_swap_sym_out (abfd
, (void *) &flinfo
.last_file
,
6217 (void *) flinfo
.outsyms
);
6218 pos
= obj_sym_filepos (abfd
) + flinfo
.last_file_index
* symesz
;
6219 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6220 || bfd_bwrite (flinfo
.outsyms
, symesz
, abfd
) != symesz
)
6224 /* Write out all the global symbols which do not come from XCOFF
6226 bfd_hash_traverse (&info
->hash
->table
, xcoff_write_global_symbol
, &flinfo
);
6228 free (flinfo
.outsyms
);
6229 flinfo
.outsyms
= NULL
;
6231 /* Now that we have written out all the global symbols, we know the
6232 symbol indices to use for relocs against them, and we can finally
6233 write out the relocs. */
6234 amt
= max_output_reloc_count
* relsz
;
6235 external_relocs
= bfd_malloc (amt
);
6236 if (external_relocs
== NULL
&& max_output_reloc_count
!= 0)
6239 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6241 struct internal_reloc
*irel
;
6242 struct internal_reloc
*irelend
;
6243 struct xcoff_link_hash_entry
**rel_hash
;
6244 struct xcoff_toc_rel_hash
*toc_rel_hash
;
6246 bfd_size_type rel_size
;
6248 /* A stripped file has no relocs. */
6249 if (info
->strip
== strip_all
)
6255 if (o
->reloc_count
== 0)
6258 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6259 irelend
= irel
+ o
->reloc_count
;
6260 rel_hash
= flinfo
.section_info
[o
->target_index
].rel_hashes
;
6261 for (; irel
< irelend
; irel
++, rel_hash
++)
6263 if (*rel_hash
!= NULL
)
6265 if ((*rel_hash
)->indx
< 0)
6267 (*info
->callbacks
->unattached_reloc
)
6268 (info
, (*rel_hash
)->root
.root
.string
,
6269 NULL
, o
, irel
->r_vaddr
);
6270 (*rel_hash
)->indx
= 0;
6272 irel
->r_symndx
= (*rel_hash
)->indx
;
6276 for (toc_rel_hash
= flinfo
.section_info
[o
->target_index
].toc_rel_hashes
;
6277 toc_rel_hash
!= NULL
;
6278 toc_rel_hash
= toc_rel_hash
->next
)
6280 if (toc_rel_hash
->h
->u
.toc_indx
< 0)
6282 (*info
->callbacks
->unattached_reloc
)
6283 (info
, toc_rel_hash
->h
->root
.root
.string
,
6284 NULL
, o
, toc_rel_hash
->rel
->r_vaddr
);
6285 toc_rel_hash
->h
->u
.toc_indx
= 0;
6287 toc_rel_hash
->rel
->r_symndx
= toc_rel_hash
->h
->u
.toc_indx
;
6290 /* XCOFF requires that the relocs be sorted by address. We tend
6291 to produce them in the order in which their containing csects
6292 appear in the symbol table, which is not necessarily by
6293 address. So we sort them here. There may be a better way to
6295 qsort ((void *) flinfo
.section_info
[o
->target_index
].relocs
,
6296 o
->reloc_count
, sizeof (struct internal_reloc
),
6299 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6300 irelend
= irel
+ o
->reloc_count
;
6301 erel
= external_relocs
;
6302 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
6303 bfd_coff_swap_reloc_out (abfd
, (void *) irel
, (void *) erel
);
6305 rel_size
= relsz
* o
->reloc_count
;
6306 if (bfd_seek (abfd
, o
->rel_filepos
, SEEK_SET
) != 0
6307 || bfd_bwrite ((void *) external_relocs
, rel_size
, abfd
) != rel_size
)
6311 free (external_relocs
);
6312 external_relocs
= NULL
;
6314 /* Free up the section information. */
6315 if (flinfo
.section_info
!= NULL
)
6319 for (i
= 0; i
< abfd
->section_count
; i
++)
6321 free (flinfo
.section_info
[i
].relocs
);
6322 free (flinfo
.section_info
[i
].rel_hashes
);
6324 free (flinfo
.section_info
);
6325 flinfo
.section_info
= NULL
;
6328 /* Write out the loader section contents. */
6329 o
= xcoff_hash_table (info
)->loader_section
;
6332 BFD_ASSERT ((bfd_byte
*) flinfo
.ldrel
6333 == (xcoff_hash_table (info
)->loader_section
->contents
6334 + xcoff_hash_table (info
)->ldhdr
.l_impoff
));
6335 if (!bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6336 (file_ptr
) o
->output_offset
, o
->size
))
6340 /* Write out the magic sections. */
6341 o
= xcoff_hash_table (info
)->linkage_section
;
6343 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6344 (file_ptr
) o
->output_offset
,
6347 o
= xcoff_hash_table (info
)->toc_section
;
6349 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6350 (file_ptr
) o
->output_offset
,
6353 o
= xcoff_hash_table (info
)->descriptor_section
;
6355 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6356 (file_ptr
) o
->output_offset
,
6360 /* Write out the string table. */
6361 pos
= obj_sym_filepos (abfd
) + obj_raw_syment_count (abfd
) * symesz
;
6362 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6365 _bfd_stringtab_size (flinfo
.strtab
) + STRING_SIZE_SIZE
,
6367 amt
= STRING_SIZE_SIZE
;
6368 if (bfd_bwrite (strbuf
, amt
, abfd
) != amt
)
6370 if (! _bfd_stringtab_emit (abfd
, flinfo
.strtab
))
6373 _bfd_stringtab_free (flinfo
.strtab
);
6375 /* Write out the debugging string table. */
6376 o
= xcoff_hash_table (info
)->debug_section
;
6379 struct bfd_strtab_hash
*debug_strtab
;
6381 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
6382 BFD_ASSERT (o
->output_section
->size
- o
->output_offset
6383 >= _bfd_stringtab_size (debug_strtab
));
6384 pos
= o
->output_section
->filepos
+ o
->output_offset
;
6385 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6387 if (! _bfd_stringtab_emit (abfd
, debug_strtab
))
6391 /* Setting symcount to 0 will cause write_object_contents to
6392 not try to write out the symbols. */
6398 if (flinfo
.strtab
!= NULL
)
6399 _bfd_stringtab_free (flinfo
.strtab
);
6401 if (flinfo
.section_info
!= NULL
)
6405 for (i
= 0; i
< abfd
->section_count
; i
++)
6407 free (flinfo
.section_info
[i
].relocs
);
6408 free (flinfo
.section_info
[i
].rel_hashes
);
6410 free (flinfo
.section_info
);
6413 free (flinfo
.internal_syms
);
6414 free (flinfo
.sym_indices
);
6415 free (flinfo
.outsyms
);
6416 free (flinfo
.linenos
);
6417 free (flinfo
.contents
);
6418 free (flinfo
.external_relocs
);
6419 free (external_relocs
);