1 /* POWER/PowerPC XCOFF linker support.
2 Copyright (C) 1995-2021 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 bool 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 (info
->output_bfd
, 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 bool 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 bool 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
;
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
;
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",
1817 else if (aux
.x_csect
.x_smclas
== XMC_UL
)
1819 /* This is a thread-local unitialized csect. */
1820 csect
= bfd_make_section_anyway_with_flags (abfd
, ".tbss",
1821 SEC_ALLOC
| SEC_THREAD_LOCAL
);
1824 csect
= bfd_make_section_anyway_with_flags (abfd
, ".bss",
1829 csect
->vma
= sym
.n_value
;
1830 csect
->size
= aux
.x_csect
.x_scnlen
.l
;
1831 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1832 /* There are a number of other fields and section flags
1833 which we do not bother to set. */
1835 csect_index
= ((esym
1836 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1839 amt
= sizeof (struct coff_section_tdata
);
1840 csect
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
1841 if (csect
->used_by_bfd
== NULL
)
1843 amt
= sizeof (struct xcoff_section_tdata
);
1844 coff_section_data (abfd
, csect
)->tdata
= bfd_zalloc (abfd
, amt
);
1845 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1847 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1849 if (first_csect
== NULL
)
1850 first_csect
= csect
;
1852 if (EXTERN_SYM_P (sym
.n_sclass
))
1854 csect
->flags
|= SEC_IS_COMMON
;
1857 value
= aux
.x_csect
.x_scnlen
.l
;
1863 /* Check for magic symbol names. */
1864 if ((smtyp
== XTY_SD
|| smtyp
== XTY_CM
)
1865 && aux
.x_csect
.x_smclas
!= XMC_TC
1866 && aux
.x_csect
.x_smclas
!= XMC_TD
)
1872 if (strcmp (name
, "_text") == 0)
1873 i
= XCOFF_SPECIAL_SECTION_TEXT
;
1874 else if (strcmp (name
, "_etext") == 0)
1875 i
= XCOFF_SPECIAL_SECTION_ETEXT
;
1876 else if (strcmp (name
, "_data") == 0)
1877 i
= XCOFF_SPECIAL_SECTION_DATA
;
1878 else if (strcmp (name
, "_edata") == 0)
1879 i
= XCOFF_SPECIAL_SECTION_EDATA
;
1880 else if (strcmp (name
, "_end") == 0)
1881 i
= XCOFF_SPECIAL_SECTION_END
;
1883 else if (name
[0] == 'e' && strcmp (name
, "end") == 0)
1884 i
= XCOFF_SPECIAL_SECTION_END2
;
1887 xcoff_hash_table (info
)->special_sections
[i
] = csect
;
1890 /* Now we have enough information to add the symbol to the
1891 linker hash table. */
1893 if (EXTERN_SYM_P (sym
.n_sclass
))
1898 BFD_ASSERT (section
!= NULL
);
1900 /* We must copy the name into memory if we got it from the
1901 syment itself, rather than the string table. */
1902 copy
= default_copy
;
1903 if (sym
._n
._n_n
._n_zeroes
!= 0
1904 || sym
._n
._n_n
._n_offset
== 0)
1907 /* Ignore global linkage code when linking statically. */
1908 if (info
->static_link
1909 && (smtyp
== XTY_SD
|| smtyp
== XTY_LD
)
1910 && aux
.x_csect
.x_smclas
== XMC_GL
)
1912 section
= bfd_und_section_ptr
;
1916 /* The AIX linker appears to only detect multiple symbol
1917 definitions when there is a reference to the symbol. If
1918 a symbol is defined multiple times, and the only
1919 references are from the same object file, the AIX linker
1920 appears to permit it. It does not merge the different
1921 definitions, but handles them independently. On the
1922 other hand, if there is a reference, the linker reports
1925 This matters because the AIX <net/net_globals.h> header
1926 file actually defines an initialized array, so we have to
1927 actually permit that to work.
1929 Just to make matters even more confusing, the AIX linker
1930 appears to permit multiple symbol definitions whenever
1931 the second definition is in an archive rather than an
1932 object file. This may be a consequence of the manner in
1933 which it handles archives: I think it may load the entire
1934 archive in as separate csects, and then let garbage
1935 collection discard symbols.
1937 We also have to handle the case of statically linking a
1938 shared object, which will cause symbol redefinitions,
1939 although this is an easier case to detect. */
1940 else if (info
->output_bfd
->xvec
== abfd
->xvec
)
1942 if (! bfd_is_und_section (section
))
1943 *sym_hash
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1944 name
, true, copy
, false);
1946 /* Make a copy of the symbol name to prevent problems with
1948 *sym_hash
= ((struct xcoff_link_hash_entry
*)
1949 bfd_wrapped_link_hash_lookup (abfd
, info
, name
,
1950 true, true, false));
1952 if (*sym_hash
== NULL
)
1954 if (((*sym_hash
)->root
.type
== bfd_link_hash_defined
1955 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1956 && ! bfd_is_und_section (section
)
1957 && ! bfd_is_com_section (section
))
1959 /* This is a second definition of a defined symbol. */
1960 if (((*sym_hash
)->flags
& XCOFF_DEF_REGULAR
) == 0
1961 && ((*sym_hash
)->flags
& XCOFF_DEF_DYNAMIC
) != 0)
1963 /* The existing symbol is from a shared library.
1965 (*sym_hash
)->root
.type
= bfd_link_hash_undefined
;
1966 (*sym_hash
)->root
.u
.undef
.abfd
=
1967 (*sym_hash
)->root
.u
.def
.section
->owner
;
1969 else if (abfd
->my_archive
!= NULL
)
1971 /* This is a redefinition in an object contained
1972 in an archive. Just ignore it. See the
1974 section
= bfd_und_section_ptr
;
1977 else if (sym
.n_sclass
== C_AIX_WEAKEXT
1978 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1980 /* At least one of the definitions is weak.
1981 Allow the normal rules to take effect. */
1983 else if ((*sym_hash
)->root
.u
.undef
.next
!= NULL
1984 || info
->hash
->undefs_tail
== &(*sym_hash
)->root
)
1986 /* This symbol has been referenced. In this
1987 case, we just continue and permit the
1988 multiple definition error. See the comment
1989 above about the behaviour of the AIX linker. */
1991 else if ((*sym_hash
)->smclas
== aux
.x_csect
.x_smclas
)
1993 /* The symbols are both csects of the same
1994 class. There is at least a chance that this
1995 is a semi-legitimate redefinition. */
1996 section
= bfd_und_section_ptr
;
1998 (*sym_hash
)->flags
|= XCOFF_MULTIPLY_DEFINED
;
2001 else if (((*sym_hash
)->flags
& XCOFF_MULTIPLY_DEFINED
) != 0
2002 && (*sym_hash
)->root
.type
== bfd_link_hash_defined
2003 && (bfd_is_und_section (section
)
2004 || bfd_is_com_section (section
)))
2006 /* This is a reference to a multiply defined symbol.
2007 Report the error now. See the comment above
2008 about the behaviour of the AIX linker. We could
2009 also do this with warning symbols, but I'm not
2010 sure the XCOFF linker is wholly prepared to
2011 handle them, and that would only be a warning,
2013 (*info
->callbacks
->multiple_definition
) (info
,
2017 /* Try not to give this error too many times. */
2018 (*sym_hash
)->flags
&= ~XCOFF_MULTIPLY_DEFINED
;
2022 /* _bfd_generic_link_add_one_symbol may call the linker to
2023 generate an error message, and the linker may try to read
2024 the symbol table to give a good error. Right now, the
2025 line numbers are in an inconsistent state, since they are
2026 counted both in the real sections and in the new csects.
2027 We need to leave the count in the real sections so that
2028 the linker can report the line number of the error
2029 correctly, so temporarily clobber the link to the csects
2030 so that the linker will not try to read the line numbers
2031 a second time from the csects. */
2032 BFD_ASSERT (last_real
->next
== first_csect
);
2033 last_real
->next
= NULL
;
2034 flags
= (sym
.n_sclass
== C_EXT
? BSF_GLOBAL
: BSF_WEAK
);
2035 ok
= (_bfd_generic_link_add_one_symbol
2036 (info
, abfd
, name
, flags
, section
, value
, NULL
, copy
, true,
2037 (struct bfd_link_hash_entry
**) sym_hash
));
2038 last_real
->next
= first_csect
;
2042 if (smtyp
== XTY_CM
)
2044 if ((*sym_hash
)->root
.type
!= bfd_link_hash_common
2045 || (*sym_hash
)->root
.u
.c
.p
->section
!= csect
)
2046 /* We don't need the common csect we just created. */
2049 (*sym_hash
)->root
.u
.c
.p
->alignment_power
2050 = csect
->alignment_power
;
2053 if (info
->output_bfd
->xvec
== abfd
->xvec
)
2059 || section
== bfd_und_section_ptr
)
2060 flag
= XCOFF_REF_REGULAR
;
2062 flag
= XCOFF_DEF_REGULAR
;
2063 (*sym_hash
)->flags
|= flag
;
2065 if ((*sym_hash
)->smclas
== XMC_UA
2066 || flag
== XCOFF_DEF_REGULAR
)
2067 (*sym_hash
)->smclas
= aux
.x_csect
.x_smclas
;
2071 if (smtyp
== XTY_ER
)
2072 *csect_cache
= section
;
2075 *csect_cache
= csect
;
2077 xcoff_section_data (abfd
, csect
)->last_symndx
2078 = (esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)) / symesz
;
2081 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2082 sym_hash
+= sym
.n_numaux
+ 1;
2083 csect_cache
+= sym
.n_numaux
+ 1;
2084 lineno_counts
+= sym
.n_numaux
+ 1;
2087 BFD_ASSERT (last_real
== NULL
|| last_real
->next
== first_csect
);
2089 /* Make sure that we have seen all the relocs. */
2090 for (o
= abfd
->sections
; o
!= first_csect
; o
= o
->next
)
2092 /* Debugging sections have no csects. */
2093 if (bfd_section_flags (o
) & SEC_DEBUGGING
)
2096 /* Reset the section size and the line number count, since the
2097 data is now attached to the csects. Don't reset the size of
2098 the .debug section, since we need to read it below in
2099 bfd_xcoff_size_dynamic_sections. */
2100 if (strcmp (bfd_section_name (o
), ".debug") != 0)
2102 o
->lineno_count
= 0;
2104 if ((o
->flags
& SEC_RELOC
) != 0)
2107 struct internal_reloc
*rel
;
2108 asection
**rel_csect
;
2110 rel
= reloc_info
[o
->target_index
].relocs
;
2111 rel_csect
= reloc_info
[o
->target_index
].csects
;
2113 for (i
= 0; i
< o
->reloc_count
; i
++, rel
++, rel_csect
++)
2115 if (*rel_csect
== NULL
)
2118 /* xgettext:c-format */
2119 (_("%pB: reloc %s:%" PRId64
" not in csect"),
2120 abfd
, o
->name
, (int64_t) i
);
2121 bfd_set_error (bfd_error_bad_value
);
2125 /* We identify all function symbols that are the target
2126 of a relocation, so that we can create glue code for
2127 functions imported from dynamic objects. */
2128 if (info
->output_bfd
->xvec
== abfd
->xvec
2129 && *rel_csect
!= bfd_und_section_ptr
2130 && obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
] != NULL
)
2132 struct xcoff_link_hash_entry
*h
;
2134 h
= obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
];
2135 /* If the symbol name starts with a period, it is
2136 the code of a function. If the symbol is
2137 currently undefined, then add an undefined symbol
2138 for the function descriptor. This should do no
2139 harm, because any regular object that defines the
2140 function should also define the function
2141 descriptor. It helps, because it means that we
2142 will identify the function descriptor with a
2143 dynamic object if a dynamic object defines it. */
2144 if (h
->root
.root
.string
[0] == '.'
2145 && h
->descriptor
== NULL
)
2147 struct xcoff_link_hash_entry
*hds
;
2148 struct bfd_link_hash_entry
*bh
;
2150 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2151 h
->root
.root
.string
+ 1,
2155 if (hds
->root
.type
== bfd_link_hash_new
)
2158 if (! (_bfd_generic_link_add_one_symbol
2159 (info
, abfd
, hds
->root
.root
.string
,
2160 (flagword
) 0, bfd_und_section_ptr
,
2161 (bfd_vma
) 0, NULL
, false,
2164 hds
= (struct xcoff_link_hash_entry
*) bh
;
2166 hds
->flags
|= XCOFF_DESCRIPTOR
;
2167 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
2168 hds
->descriptor
= h
;
2169 h
->descriptor
= hds
;
2171 if (h
->root
.root
.string
[0] == '.')
2172 h
->flags
|= XCOFF_CALLED
;
2176 free (reloc_info
[o
->target_index
].csects
);
2177 reloc_info
[o
->target_index
].csects
= NULL
;
2179 /* Reset SEC_RELOC and the reloc_count, since the reloc
2180 information is now attached to the csects. */
2181 o
->flags
&=~ SEC_RELOC
;
2184 /* If we are not keeping memory, free the reloc information. */
2185 if (! info
->keep_memory
2186 && coff_section_data (abfd
, o
) != NULL
2187 && ! coff_section_data (abfd
, o
)->keep_relocs
)
2189 free (coff_section_data (abfd
, o
)->relocs
);
2190 coff_section_data (abfd
, o
)->relocs
= NULL
;
2194 /* Free up the line numbers. FIXME: We could cache these
2195 somewhere for the final link, to avoid reading them again. */
2196 free (reloc_info
[o
->target_index
].linenos
);
2197 reloc_info
[o
->target_index
].linenos
= NULL
;
2202 obj_coff_keep_syms (abfd
) = keep_syms
;
2207 if (reloc_info
!= NULL
)
2209 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2211 free (reloc_info
[o
->target_index
].csects
);
2212 free (reloc_info
[o
->target_index
].linenos
);
2216 obj_coff_keep_syms (abfd
) = keep_syms
;
2223 /* Add symbols from an XCOFF object file. */
2226 xcoff_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2228 if (! _bfd_coff_get_external_symbols (abfd
))
2230 if (! xcoff_link_add_symbols (abfd
, info
))
2232 if (! info
->keep_memory
)
2234 if (! _bfd_coff_free_symbols (abfd
))
2240 /* Look through the loader symbols to see if this dynamic object
2241 should be included in the link. The native linker uses the loader
2242 symbols, not the normal symbol table, so we do too. */
2245 xcoff_link_check_dynamic_ar_symbols (bfd
*abfd
,
2246 struct bfd_link_info
*info
,
2252 struct internal_ldhdr ldhdr
;
2253 const char *strings
;
2254 bfd_byte
*elsym
, *elsymend
;
2258 lsec
= bfd_get_section_by_name (abfd
, ".loader");
2260 /* There are no symbols, so don't try to include it. */
2263 if (! xcoff_get_section_contents (abfd
, lsec
))
2265 contents
= coff_section_data (abfd
, lsec
)->contents
;
2267 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
2269 strings
= (char *) contents
+ ldhdr
.l_stoff
;
2271 elsym
= contents
+ bfd_xcoff_loader_symbol_offset (abfd
, &ldhdr
);
2273 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz (abfd
);
2274 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz (abfd
))
2276 struct internal_ldsym ldsym
;
2277 char nambuf
[SYMNMLEN
+ 1];
2279 struct bfd_link_hash_entry
*h
;
2281 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
2283 /* We are only interested in exported symbols. */
2284 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
2287 if (ldsym
._l
._l_l
._l_zeroes
== 0)
2288 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
2291 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
2292 nambuf
[SYMNMLEN
] = '\0';
2296 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2298 /* We are only interested in symbols that are currently
2299 undefined. At this point we know that we are using an XCOFF
2302 && h
->type
== bfd_link_hash_undefined
2303 && (((struct xcoff_link_hash_entry
*) h
)->flags
2304 & XCOFF_DEF_DYNAMIC
) == 0)
2306 if (!(*info
->callbacks
2307 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2314 /* We do not need this shared object. */
2315 if (contents
!= NULL
&& ! coff_section_data (abfd
, lsec
)->keep_contents
)
2317 free (coff_section_data (abfd
, lsec
)->contents
);
2318 coff_section_data (abfd
, lsec
)->contents
= NULL
;
2324 /* Look through the symbols to see if this object file should be
2325 included in the link. */
2328 xcoff_link_check_ar_symbols (bfd
*abfd
,
2329 struct bfd_link_info
*info
,
2333 bfd_size_type symesz
;
2339 if ((abfd
->flags
& DYNAMIC
) != 0
2340 && ! info
->static_link
2341 && info
->output_bfd
->xvec
== abfd
->xvec
)
2342 return xcoff_link_check_dynamic_ar_symbols (abfd
, info
, pneeded
, subsbfd
);
2344 symesz
= bfd_coff_symesz (abfd
);
2345 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
2346 esym_end
= esym
+ obj_raw_syment_count (abfd
) * symesz
;
2347 while (esym
< esym_end
)
2349 struct internal_syment sym
;
2351 bfd_coff_swap_sym_in (abfd
, (void *) esym
, (void *) &sym
);
2352 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2354 if (EXTERN_SYM_P (sym
.n_sclass
) && sym
.n_scnum
!= N_UNDEF
)
2357 char buf
[SYMNMLEN
+ 1];
2358 struct bfd_link_hash_entry
*h
;
2360 /* This symbol is externally visible, and is defined by this
2362 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
2366 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
2368 /* We are only interested in symbols that are currently
2369 undefined. If a symbol is currently known to be common,
2370 XCOFF linkers do not bring in an object file which
2371 defines it. We also don't bring in symbols to satisfy
2372 undefined references in shared objects. */
2374 && h
->type
== bfd_link_hash_undefined
2375 && (info
->output_bfd
->xvec
!= abfd
->xvec
2376 || (((struct xcoff_link_hash_entry
*) h
)->flags
2377 & XCOFF_DEF_DYNAMIC
) == 0))
2379 if (!(*info
->callbacks
2380 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2388 /* We do not need this object file. */
2392 /* Check a single archive element to see if we need to include it in
2393 the link. *PNEEDED is set according to whether this element is
2394 needed in the link or not. This is called via
2395 _bfd_generic_link_add_archive_symbols. */
2398 xcoff_link_check_archive_element (bfd
*abfd
,
2399 struct bfd_link_info
*info
,
2400 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
2401 const char *name ATTRIBUTE_UNUSED
,
2407 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2408 if (!_bfd_coff_get_external_symbols (abfd
))
2412 if (!xcoff_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
2417 /* Potentially, the add_archive_element hook may have set a
2418 substitute BFD for us. */
2422 && !_bfd_coff_free_symbols (oldbfd
))
2424 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2425 if (!_bfd_coff_get_external_symbols (abfd
))
2428 if (!xcoff_link_add_symbols (abfd
, info
))
2430 if (info
->keep_memory
)
2436 if (!_bfd_coff_free_symbols (abfd
))
2443 /* Given an XCOFF BFD, add symbols to the global hash table as
2447 _bfd_xcoff_bfd_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2449 switch (bfd_get_format (abfd
))
2452 return xcoff_link_add_object_symbols (abfd
, info
);
2455 /* If the archive has a map, do the usual search. We then need
2456 to check the archive for dynamic objects, because they may not
2457 appear in the archive map even though they should, perhaps, be
2458 included. If the archive has no map, we just consider each object
2459 file in turn, since that apparently is what the AIX native linker
2461 if (bfd_has_map (abfd
))
2463 if (! (_bfd_generic_link_add_archive_symbols
2464 (abfd
, info
, xcoff_link_check_archive_element
)))
2471 member
= bfd_openr_next_archived_file (abfd
, NULL
);
2472 while (member
!= NULL
)
2474 if (bfd_check_format (member
, bfd_object
)
2475 && (info
->output_bfd
->xvec
== member
->xvec
)
2476 && (! bfd_has_map (abfd
) || (member
->flags
& DYNAMIC
) != 0))
2480 if (! xcoff_link_check_archive_element (member
, info
,
2481 NULL
, NULL
, &needed
))
2484 member
->archive_pass
= -1;
2486 member
= bfd_openr_next_archived_file (abfd
, member
);
2493 bfd_set_error (bfd_error_wrong_format
);
2499 _bfd_xcoff_define_common_symbol (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2500 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
2501 struct bfd_link_hash_entry
*harg
)
2503 struct xcoff_link_hash_entry
*h
;
2505 if (!bfd_generic_define_common_symbol (output_bfd
, info
, harg
))
2508 h
= (struct xcoff_link_hash_entry
*) harg
;
2509 h
->flags
|= XCOFF_DEF_REGULAR
;
2513 /* If symbol H has not been interpreted as a function descriptor,
2514 see whether it should be. Set up its descriptor information if so. */
2517 xcoff_find_function (struct bfd_link_info
*info
,
2518 struct xcoff_link_hash_entry
*h
)
2520 if ((h
->flags
& XCOFF_DESCRIPTOR
) == 0
2521 && h
->root
.root
.string
[0] != '.')
2524 struct xcoff_link_hash_entry
*hfn
;
2527 amt
= strlen (h
->root
.root
.string
) + 2;
2528 fnname
= bfd_malloc (amt
);
2532 strcpy (fnname
+ 1, h
->root
.root
.string
);
2533 hfn
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2534 fnname
, false, false, true);
2537 && hfn
->smclas
== XMC_PR
2538 && (hfn
->root
.type
== bfd_link_hash_defined
2539 || hfn
->root
.type
== bfd_link_hash_defweak
))
2541 h
->flags
|= XCOFF_DESCRIPTOR
;
2542 h
->descriptor
= hfn
;
2543 hfn
->descriptor
= h
;
2549 /* Return true if the given bfd contains at least one shared object. */
2552 xcoff_archive_contains_shared_object_p (struct bfd_link_info
*info
,
2555 struct xcoff_archive_info
*archive_info
;
2558 archive_info
= xcoff_get_archive_info (info
, archive
);
2559 if (!archive_info
->know_contains_shared_object_p
)
2561 member
= bfd_openr_next_archived_file (archive
, NULL
);
2562 while (member
!= NULL
&& (member
->flags
& DYNAMIC
) == 0)
2563 member
= bfd_openr_next_archived_file (archive
, member
);
2565 archive_info
->contains_shared_object_p
= (member
!= NULL
);
2566 archive_info
->know_contains_shared_object_p
= 1;
2568 return archive_info
->contains_shared_object_p
;
2571 /* Symbol H qualifies for export by -bexpfull. Return true if it also
2572 qualifies for export by -bexpall. */
2575 xcoff_covered_by_expall_p (struct xcoff_link_hash_entry
*h
)
2577 /* Exclude symbols beginning with '_'. */
2578 if (h
->root
.root
.string
[0] == '_')
2581 /* Exclude archive members that would otherwise be unreferenced. */
2582 if ((h
->flags
& XCOFF_MARK
) == 0
2583 && (h
->root
.type
== bfd_link_hash_defined
2584 || h
->root
.type
== bfd_link_hash_defweak
)
2585 && h
->root
.u
.def
.section
->owner
!= NULL
2586 && h
->root
.u
.def
.section
->owner
->my_archive
!= NULL
)
2592 /* Return true if symbol H qualifies for the forms of automatic export
2593 specified by AUTO_EXPORT_FLAGS. */
2596 xcoff_auto_export_p (struct bfd_link_info
*info
,
2597 struct xcoff_link_hash_entry
*h
,
2598 unsigned int auto_export_flags
)
2600 /* Don't automatically export things that were explicitly exported. */
2601 if ((h
->flags
& XCOFF_EXPORT
) != 0)
2604 /* Don't export things that we don't define. */
2605 if ((h
->flags
& XCOFF_DEF_REGULAR
) == 0)
2608 /* Don't export functions; export their descriptors instead. */
2609 if (h
->root
.root
.string
[0] == '.')
2612 /* We don't export a symbol which is being defined by an object
2613 included from an archive which contains a shared object. The
2614 rationale is that if an archive contains both an unshared and
2615 a shared object, then there must be some reason that the
2616 unshared object is unshared, and we don't want to start
2617 providing a shared version of it. In particular, this solves
2618 a bug involving the _savefNN set of functions. gcc will call
2619 those functions without providing a slot to restore the TOC,
2620 so it is essential that these functions be linked in directly
2621 and not from a shared object, which means that a shared
2622 object which also happens to link them in must not export
2623 them. This is confusing, but I haven't been able to think of
2624 a different approach. Note that the symbols can, of course,
2625 be exported explicitly. */
2626 if (h
->root
.type
== bfd_link_hash_defined
2627 || h
->root
.type
== bfd_link_hash_defweak
)
2631 owner
= h
->root
.u
.def
.section
->owner
;
2633 && owner
->my_archive
!= NULL
2634 && xcoff_archive_contains_shared_object_p (info
, owner
->my_archive
))
2638 /* Otherwise, all symbols are exported by -bexpfull. */
2639 if ((auto_export_flags
& XCOFF_EXPFULL
) != 0)
2642 /* Despite its name, -bexpall exports most but not all symbols. */
2643 if ((auto_export_flags
& XCOFF_EXPALL
) != 0
2644 && xcoff_covered_by_expall_p (h
))
2650 /* Return true if relocation REL needs to be copied to the .loader section.
2651 If REL is against a global symbol, H is that symbol, otherwise it
2655 xcoff_need_ldrel_p (struct bfd_link_info
*info
, struct internal_reloc
*rel
,
2656 struct xcoff_link_hash_entry
*h
)
2658 if (!xcoff_hash_table (info
)->loader_section
)
2661 switch (rel
->r_type
)
2668 /* We should never need a .loader reloc for a TOC-relative reloc. */
2672 /* In this case, relocations against defined symbols can be resolved
2675 || h
->root
.type
== bfd_link_hash_defined
2676 || h
->root
.type
== bfd_link_hash_defweak
2677 || h
->root
.type
== bfd_link_hash_common
)
2680 /* We will always provide a local definition of function symbols,
2681 even if we don't have one yet. */
2682 if ((h
->flags
& XCOFF_CALLED
) != 0)
2691 /* Absolute relocations against absolute symbols can be
2692 resolved statically. */
2694 && (h
->root
.type
== bfd_link_hash_defined
2695 || h
->root
.type
== bfd_link_hash_defweak
)
2696 && !h
->root
.rel_from_abs
)
2698 asection
*sec
= h
->root
.u
.def
.section
;
2699 if (bfd_is_abs_section (sec
)
2701 && bfd_is_abs_section (sec
->output_section
)))
2716 /* Mark a symbol as not being garbage, including the section in which
2720 xcoff_mark_symbol (struct bfd_link_info
*info
, struct xcoff_link_hash_entry
*h
)
2722 if ((h
->flags
& XCOFF_MARK
) != 0)
2725 h
->flags
|= XCOFF_MARK
;
2727 /* If we're marking an undefined symbol, try find some way of
2729 if (!bfd_link_relocatable (info
)
2730 && (h
->flags
& XCOFF_IMPORT
) == 0
2731 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
2732 && (h
->root
.type
== bfd_link_hash_undefined
2733 || h
->root
.type
== bfd_link_hash_undefweak
))
2735 /* First check whether this symbol can be interpreted as an
2736 undefined function descriptor for a defined function symbol. */
2737 if (!xcoff_find_function (info
, h
))
2740 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
2741 && (h
->descriptor
->root
.type
== bfd_link_hash_defined
2742 || h
->descriptor
->root
.type
== bfd_link_hash_defweak
))
2744 /* This is a descriptor for a defined symbol, but the input
2745 objects have not defined the descriptor itself. Fill in
2746 the definition automatically.
2748 Note that we do this even if we found a dynamic definition
2749 of H. The local function definition logically overrides
2753 sec
= xcoff_hash_table (info
)->descriptor_section
;
2754 h
->root
.type
= bfd_link_hash_defined
;
2755 h
->root
.u
.def
.section
= sec
;
2756 h
->root
.u
.def
.value
= sec
->size
;
2758 h
->flags
|= XCOFF_DEF_REGULAR
;
2760 /* The size of the function descriptor depends on whether this
2761 is xcoff32 (12) or xcoff64 (24). */
2762 sec
->size
+= bfd_xcoff_function_descriptor_size (sec
->owner
);
2764 /* A function descriptor uses two relocs: one for the
2765 associated code, and one for the TOC address. */
2766 xcoff_hash_table (info
)->ldrel_count
+= 2;
2767 sec
->reloc_count
+= 2;
2769 /* Mark the function itself. */
2770 if (!xcoff_mark_symbol (info
, h
->descriptor
))
2773 /* Mark the TOC section, so that we get an anchor
2774 to relocate against. */
2775 if (!xcoff_mark (info
, xcoff_hash_table (info
)->toc_section
))
2778 /* We handle writing out the contents of the descriptor in
2779 xcoff_write_global_symbol. */
2781 else if (info
->static_link
)
2782 /* We can't get a symbol value dynamically, so just assume
2783 that it's undefined. */
2784 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2785 else if ((h
->flags
& XCOFF_CALLED
) != 0)
2787 /* This is a function symbol for which we need to create
2790 struct xcoff_link_hash_entry
*hds
;
2792 /* Mark the descriptor (and its TOC section). */
2793 hds
= h
->descriptor
;
2794 BFD_ASSERT ((hds
->root
.type
== bfd_link_hash_undefined
2795 || hds
->root
.type
== bfd_link_hash_undefweak
)
2796 && (hds
->flags
& XCOFF_DEF_REGULAR
) == 0);
2797 if (!xcoff_mark_symbol (info
, hds
))
2800 /* Treat this symbol as undefined if the descriptor was. */
2801 if ((hds
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
2802 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2804 /* Allocate room for the global linkage code itself. */
2805 sec
= xcoff_hash_table (info
)->linkage_section
;
2806 h
->root
.type
= bfd_link_hash_defined
;
2807 h
->root
.u
.def
.section
= sec
;
2808 h
->root
.u
.def
.value
= sec
->size
;
2810 h
->flags
|= XCOFF_DEF_REGULAR
;
2811 sec
->size
+= bfd_xcoff_glink_code_size (info
->output_bfd
);
2813 /* The global linkage code requires a TOC entry for the
2815 if (hds
->toc_section
== NULL
)
2820 xcoff32 uses 4 bytes in the toc.
2821 xcoff64 uses 8 bytes in the toc. */
2822 if (bfd_xcoff_is_xcoff64 (info
->output_bfd
))
2824 else if (bfd_xcoff_is_xcoff32 (info
->output_bfd
))
2829 /* Allocate room in the fallback TOC section. */
2830 hds
->toc_section
= xcoff_hash_table (info
)->toc_section
;
2831 hds
->u
.toc_offset
= hds
->toc_section
->size
;
2832 hds
->toc_section
->size
+= byte_size
;
2833 if (!xcoff_mark (info
, hds
->toc_section
))
2836 /* Allocate room for a static and dynamic R_TOC
2838 ++xcoff_hash_table (info
)->ldrel_count
;
2839 ++hds
->toc_section
->reloc_count
;
2841 /* Set the index to -2 to force this symbol to
2844 hds
->flags
|= XCOFF_SET_TOC
| XCOFF_LDREL
;
2847 else if ((h
->flags
& XCOFF_DEF_DYNAMIC
) == 0)
2849 /* Record that the symbol was undefined, then import it.
2850 -brtl links use a special fake import file. */
2851 h
->flags
|= XCOFF_WAS_UNDEFINED
| XCOFF_IMPORT
;
2852 if (xcoff_hash_table (info
)->rtld
)
2854 if (!xcoff_set_import_path (info
, h
, "", "..", ""))
2859 if (!xcoff_set_import_path (info
, h
, NULL
, NULL
, NULL
))
2865 if (h
->root
.type
== bfd_link_hash_defined
2866 || h
->root
.type
== bfd_link_hash_defweak
)
2870 hsec
= h
->root
.u
.def
.section
;
2871 if (! bfd_is_abs_section (hsec
)
2872 && (hsec
->flags
& SEC_MARK
) == 0)
2874 if (! xcoff_mark (info
, hsec
))
2879 if (h
->toc_section
!= NULL
2880 && (h
->toc_section
->flags
& SEC_MARK
) == 0)
2882 if (! xcoff_mark (info
, h
->toc_section
))
2889 /* Look for a symbol called NAME. If the symbol is defined, mark it.
2890 If the symbol exists, set FLAGS. */
2893 xcoff_mark_symbol_by_name (struct bfd_link_info
*info
,
2894 const char *name
, unsigned int flags
)
2896 struct xcoff_link_hash_entry
*h
;
2898 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
,
2899 false, false, true);
2903 if (h
->root
.type
== bfd_link_hash_defined
2904 || h
->root
.type
== bfd_link_hash_defweak
)
2906 if (!xcoff_mark (info
, h
->root
.u
.def
.section
))
2913 /* The mark phase of garbage collection. For a given section, mark
2914 it, and all the sections which define symbols to which it refers.
2915 Because this function needs to look at the relocs, we also count
2916 the number of relocs which need to be copied into the .loader
2920 xcoff_mark (struct bfd_link_info
*info
, asection
*sec
)
2922 if (bfd_is_const_section (sec
)
2923 || (sec
->flags
& SEC_MARK
) != 0)
2926 sec
->flags
|= SEC_MARK
;
2928 if (sec
->owner
->xvec
== info
->output_bfd
->xvec
2929 && coff_section_data (sec
->owner
, sec
) != NULL
2930 && xcoff_section_data (sec
->owner
, sec
) != NULL
)
2932 struct xcoff_link_hash_entry
**syms
;
2933 struct internal_reloc
*rel
, *relend
;
2935 unsigned long i
, first
, last
;
2937 /* Mark all the symbols in this section. */
2938 syms
= obj_xcoff_sym_hashes (sec
->owner
);
2939 csects
= xcoff_data (sec
->owner
)->csects
;
2940 first
= xcoff_section_data (sec
->owner
, sec
)->first_symndx
;
2941 last
= xcoff_section_data (sec
->owner
, sec
)->last_symndx
;
2942 for (i
= first
; i
<= last
; i
++)
2943 if (csects
[i
] == sec
2945 && (syms
[i
]->flags
& XCOFF_MARK
) == 0)
2947 if (!xcoff_mark_symbol (info
, syms
[i
]))
2951 /* Look through the section relocs. */
2952 if ((sec
->flags
& SEC_RELOC
) != 0
2953 && sec
->reloc_count
> 0)
2955 rel
= xcoff_read_internal_relocs (sec
->owner
, sec
, true,
2959 relend
= rel
+ sec
->reloc_count
;
2960 for (; rel
< relend
; rel
++)
2962 struct xcoff_link_hash_entry
*h
;
2964 if ((unsigned int) rel
->r_symndx
2965 > obj_raw_syment_count (sec
->owner
))
2968 h
= obj_xcoff_sym_hashes (sec
->owner
)[rel
->r_symndx
];
2971 if ((h
->flags
& XCOFF_MARK
) == 0)
2973 if (!xcoff_mark_symbol (info
, h
))
2981 rsec
= xcoff_data (sec
->owner
)->csects
[rel
->r_symndx
];
2983 && (rsec
->flags
& SEC_MARK
) == 0)
2985 if (!xcoff_mark (info
, rsec
))
2990 /* See if this reloc needs to be copied into the .loader
2992 if (xcoff_need_ldrel_p (info
, rel
, h
))
2994 ++xcoff_hash_table (info
)->ldrel_count
;
2996 h
->flags
|= XCOFF_LDREL
;
3000 if (! info
->keep_memory
3001 && coff_section_data (sec
->owner
, sec
) != NULL
3002 && ! coff_section_data (sec
->owner
, sec
)->keep_relocs
)
3004 free (coff_section_data (sec
->owner
, sec
)->relocs
);
3005 coff_section_data (sec
->owner
, sec
)->relocs
= NULL
;
3013 /* Routines that are called after all the input files have been
3014 handled, but before the sections are laid out in memory. */
3016 /* The sweep phase of garbage collection. Remove all garbage
3020 xcoff_sweep (struct bfd_link_info
*info
)
3024 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3028 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3030 if ((o
->flags
& SEC_MARK
) == 0)
3032 /* Keep all sections from non-XCOFF input files. Keep
3033 special sections. Keep .debug sections for the
3035 if (sub
->xvec
!= info
->output_bfd
->xvec
3036 || o
== xcoff_hash_table (info
)->debug_section
3037 || o
== xcoff_hash_table (info
)->loader_section
3038 || o
== xcoff_hash_table (info
)->linkage_section
3039 || o
== xcoff_hash_table (info
)->descriptor_section
3040 || (bfd_section_flags (o
) & SEC_DEBUGGING
)
3041 || strcmp (o
->name
, ".debug") == 0)
3042 o
->flags
|= SEC_MARK
;
3053 /* Record the number of elements in a set. This is used to output the
3054 correct csect length. */
3057 bfd_xcoff_link_record_set (bfd
*output_bfd
,
3058 struct bfd_link_info
*info
,
3059 struct bfd_link_hash_entry
*harg
,
3062 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3063 struct xcoff_link_size_list
*n
;
3066 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3069 /* This will hardly ever be called. I don't want to burn four bytes
3070 per global symbol, so instead the size is kept on a linked list
3071 attached to the hash table. */
3073 n
= bfd_alloc (output_bfd
, amt
);
3076 n
->next
= xcoff_hash_table (info
)->size_list
;
3079 xcoff_hash_table (info
)->size_list
= n
;
3081 h
->flags
|= XCOFF_HAS_SIZE
;
3086 /* Import a symbol. */
3089 bfd_xcoff_import_symbol (bfd
*output_bfd
,
3090 struct bfd_link_info
*info
,
3091 struct bfd_link_hash_entry
*harg
,
3093 const char *imppath
,
3094 const char *impfile
,
3095 const char *impmember
,
3096 unsigned int syscall_flag
)
3098 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3100 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3103 /* A symbol name which starts with a period is the code for a
3104 function. If the symbol is undefined, then add an undefined
3105 symbol for the function descriptor, and import that instead. */
3106 if (h
->root
.root
.string
[0] == '.'
3107 && h
->root
.type
== bfd_link_hash_undefined
3108 && val
== (bfd_vma
) -1)
3110 struct xcoff_link_hash_entry
*hds
;
3112 hds
= h
->descriptor
;
3115 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3116 h
->root
.root
.string
+ 1,
3120 if (hds
->root
.type
== bfd_link_hash_new
)
3122 hds
->root
.type
= bfd_link_hash_undefined
;
3123 hds
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
3125 hds
->flags
|= XCOFF_DESCRIPTOR
;
3126 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
3127 hds
->descriptor
= h
;
3128 h
->descriptor
= hds
;
3131 /* Now, if the descriptor is undefined, import the descriptor
3132 rather than the symbol we were told to import. FIXME: Is
3133 this correct in all cases? */
3134 if (hds
->root
.type
== bfd_link_hash_undefined
)
3138 h
->flags
|= (XCOFF_IMPORT
| syscall_flag
);
3140 if (val
!= (bfd_vma
) -1)
3142 if (h
->root
.type
== bfd_link_hash_defined
)
3143 (*info
->callbacks
->multiple_definition
) (info
, &h
->root
, output_bfd
,
3144 bfd_abs_section_ptr
, val
);
3146 h
->root
.type
= bfd_link_hash_defined
;
3147 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
3148 h
->root
.u
.def
.value
= val
;
3152 if (!xcoff_set_import_path (info
, h
, imppath
, impfile
, impmember
))
3158 /* Export a symbol. */
3161 bfd_xcoff_export_symbol (bfd
*output_bfd
,
3162 struct bfd_link_info
*info
,
3163 struct bfd_link_hash_entry
*harg
)
3165 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3167 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3170 h
->flags
|= XCOFF_EXPORT
;
3172 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
3173 I'm just going to ignore it until somebody explains it. */
3175 /* Make sure we don't garbage collect this symbol. */
3176 if (! xcoff_mark_symbol (info
, h
))
3179 /* If this is a function descriptor, make sure we don't garbage
3180 collect the associated function code. We normally don't have to
3181 worry about this, because the descriptor will be attached to a
3182 section with relocs, but if we are creating the descriptor
3183 ourselves those relocs will not be visible to the mark code. */
3184 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3186 if (! xcoff_mark_symbol (info
, h
->descriptor
))
3193 /* Count a reloc against a symbol. This is called for relocs
3194 generated by the linker script, typically for global constructors
3198 bfd_xcoff_link_count_reloc (bfd
*output_bfd
,
3199 struct bfd_link_info
*info
,
3202 struct xcoff_link_hash_entry
*h
;
3204 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3207 h
= ((struct xcoff_link_hash_entry
*)
3208 bfd_wrapped_link_hash_lookup (output_bfd
, info
, name
, false, false,
3212 _bfd_error_handler (_("%s: no such symbol"), name
);
3213 bfd_set_error (bfd_error_no_symbols
);
3217 h
->flags
|= XCOFF_REF_REGULAR
;
3218 if (xcoff_hash_table (info
)->loader_section
)
3220 h
->flags
|= XCOFF_LDREL
;
3221 ++xcoff_hash_table (info
)->ldrel_count
;
3224 /* Mark the symbol to avoid garbage collection. */
3225 if (! xcoff_mark_symbol (info
, h
))
3231 /* This function is called for each symbol to which the linker script
3233 FIXME: In cases like the linker test ld-scripts/defined5 where a
3234 symbol is defined both by an input object file and the script,
3235 the script definition doesn't override the object file definition
3236 as is usual for other targets. At least not when the symbol is
3237 output. Other uses of the symbol value by the linker do use the
3241 bfd_xcoff_record_link_assignment (bfd
*output_bfd
,
3242 struct bfd_link_info
*info
,
3245 struct xcoff_link_hash_entry
*h
;
3247 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3250 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, true, true,
3255 h
->flags
|= XCOFF_DEF_REGULAR
;
3260 /* An xcoff_link_hash_traverse callback for which DATA points to an
3261 xcoff_loader_info. Mark all symbols that should be automatically
3265 xcoff_mark_auto_exports (struct xcoff_link_hash_entry
*h
, void *data
)
3267 struct xcoff_loader_info
*ldinfo
;
3269 ldinfo
= (struct xcoff_loader_info
*) data
;
3270 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3272 if (!xcoff_mark_symbol (ldinfo
->info
, h
))
3273 ldinfo
->failed
= true;
3278 /* Add a symbol to the .loader symbols, if necessary. */
3280 /* INPUT_BFD has an external symbol associated with hash table entry H
3281 and csect CSECT. Return true if INPUT_BFD defines H. */
3284 xcoff_final_definition_p (bfd
*input_bfd
, struct xcoff_link_hash_entry
*h
,
3287 switch (h
->root
.type
)
3289 case bfd_link_hash_defined
:
3290 case bfd_link_hash_defweak
:
3291 /* No input bfd owns absolute symbols. They are written by
3292 xcoff_write_global_symbol instead. */
3293 return (!bfd_is_abs_section (csect
)
3294 && h
->root
.u
.def
.section
== csect
);
3296 case bfd_link_hash_common
:
3297 return h
->root
.u
.c
.p
->section
->owner
== input_bfd
;
3299 case bfd_link_hash_undefined
:
3300 case bfd_link_hash_undefweak
:
3301 /* We can't treat undef.abfd as the owner because that bfd
3302 might be a dynamic object. Allow any bfd to claim it. */
3310 /* See if H should have a loader symbol associated with it. */
3313 xcoff_build_ldsym (struct xcoff_loader_info
*ldinfo
,
3314 struct xcoff_link_hash_entry
*h
)
3318 /* Warn if this symbol is exported but not defined. */
3319 if ((h
->flags
& XCOFF_EXPORT
) != 0
3320 && (h
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
3323 (_("warning: attempt to export undefined symbol `%s'"),
3324 h
->root
.root
.string
);
3328 /* We need to add a symbol to the .loader section if it is mentioned
3329 in a reloc which we are copying to the .loader section and it was
3330 not defined or common, or if it is the entry point, or if it is
3332 if (((h
->flags
& XCOFF_LDREL
) == 0
3333 || h
->root
.type
== bfd_link_hash_defined
3334 || h
->root
.type
== bfd_link_hash_defweak
3335 || h
->root
.type
== bfd_link_hash_common
)
3336 && (h
->flags
& XCOFF_ENTRY
) == 0
3337 && (h
->flags
& XCOFF_EXPORT
) == 0)
3340 /* We need to add this symbol to the .loader symbols. */
3342 BFD_ASSERT (h
->ldsym
== NULL
);
3343 amt
= sizeof (struct internal_ldsym
);
3344 h
->ldsym
= bfd_zalloc (ldinfo
->output_bfd
, amt
);
3345 if (h
->ldsym
== NULL
)
3347 ldinfo
->failed
= true;
3351 if ((h
->flags
& XCOFF_IMPORT
) != 0)
3353 /* Give imported descriptors class XMC_DS rather than XMC_UA. */
3354 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3356 h
->ldsym
->l_ifile
= h
->ldindx
;
3359 /* The first 3 symbol table indices are reserved to indicate the
3360 data, text and bss sections. */
3361 h
->ldindx
= ldinfo
->ldsym_count
+ 3;
3363 ++ldinfo
->ldsym_count
;
3365 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
->output_bfd
, ldinfo
,
3366 h
->ldsym
, h
->root
.root
.string
))
3369 h
->flags
|= XCOFF_BUILT_LDSYM
;
3373 /* An xcoff_htab_traverse callback that is called for each symbol
3374 once garbage collection is complete. */
3377 xcoff_post_gc_symbol (struct xcoff_link_hash_entry
*h
, void * p
)
3379 struct xcoff_loader_info
*ldinfo
= (struct xcoff_loader_info
*) p
;
3381 /* __rtinit, this symbol has special handling. */
3382 if (h
->flags
& XCOFF_RTINIT
)
3385 /* We don't want to garbage collect symbols which are not defined in
3386 XCOFF files. This is a convenient place to mark them. */
3387 if (xcoff_hash_table (ldinfo
->info
)->gc
3388 && (h
->flags
& XCOFF_MARK
) == 0
3389 && (h
->root
.type
== bfd_link_hash_defined
3390 || h
->root
.type
== bfd_link_hash_defweak
)
3391 && (h
->root
.u
.def
.section
->owner
== NULL
3392 || (h
->root
.u
.def
.section
->owner
->xvec
3393 != ldinfo
->info
->output_bfd
->xvec
)))
3394 h
->flags
|= XCOFF_MARK
;
3396 /* Skip discarded symbols. */
3397 if (xcoff_hash_table (ldinfo
->info
)->gc
3398 && (h
->flags
& XCOFF_MARK
) == 0)
3401 /* If this is still a common symbol, and it wasn't garbage
3402 collected, we need to actually allocate space for it in the .bss
3404 if (h
->root
.type
== bfd_link_hash_common
3405 && h
->root
.u
.c
.p
->section
->size
== 0)
3407 BFD_ASSERT (bfd_is_com_section (h
->root
.u
.c
.p
->section
));
3408 h
->root
.u
.c
.p
->section
->size
= h
->root
.u
.c
.size
;
3411 if (xcoff_hash_table (ldinfo
->info
)->loader_section
)
3413 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3414 h
->flags
|= XCOFF_EXPORT
;
3416 if (!xcoff_build_ldsym (ldinfo
, h
))
3423 /* INPUT_BFD includes XCOFF symbol ISYM, which is associated with linker
3424 hash table entry H and csect CSECT. AUX contains ISYM's auxiliary
3425 csect information, if any. NAME is the function's name if the name
3426 is stored in the .debug section, otherwise it is null.
3428 Return 1 if we should include an appropriately-adjusted ISYM
3429 in the output file, 0 if we should discard ISYM, or -1 if an
3433 xcoff_keep_symbol_p (struct bfd_link_info
*info
, bfd
*input_bfd
,
3434 struct internal_syment
*isym
,
3435 union internal_auxent
*aux
,
3436 struct xcoff_link_hash_entry
*h
,
3437 asection
*csect
, const char *name
)
3441 /* If we are skipping this csect, we want to strip the symbol too. */
3445 /* Likewise if we garbage-collected the csect. */
3446 if (xcoff_hash_table (info
)->gc
3447 && !bfd_is_abs_section (csect
)
3448 && !bfd_is_und_section (csect
)
3449 && (csect
->flags
& SEC_MARK
) == 0)
3452 /* An XCOFF linker always removes C_STAT symbols. */
3453 if (isym
->n_sclass
== C_STAT
)
3456 /* We generate the TOC anchor separately. */
3457 if (isym
->n_sclass
== C_HIDEXT
3458 && aux
->x_csect
.x_smclas
== XMC_TC0
)
3461 /* If we are stripping all symbols, we want to discard this one. */
3462 if (info
->strip
== strip_all
)
3465 /* Discard symbols that are defined elsewhere. */
3466 if (EXTERN_SYM_P (isym
->n_sclass
))
3468 if ((h
->flags
& XCOFF_ALLOCATED
) != 0)
3470 if (!xcoff_final_definition_p (input_bfd
, h
, csect
))
3474 /* If we're discarding local symbols, check whether ISYM is local. */
3475 smtyp
= SMTYP_SMTYP (aux
->x_csect
.x_smtyp
);
3476 if (info
->discard
== discard_all
3477 && !EXTERN_SYM_P (isym
->n_sclass
)
3478 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
))
3481 /* If we're stripping debugging symbols, check whether ISYM is one. */
3482 if (info
->strip
== strip_debugger
3483 && isym
->n_scnum
== N_DEBUG
)
3486 /* If we are stripping symbols based on name, check how ISYM's
3487 name should be handled. */
3488 if (info
->strip
== strip_some
3489 || info
->discard
== discard_l
)
3491 char buf
[SYMNMLEN
+ 1];
3495 name
= _bfd_coff_internal_syment_name (input_bfd
, isym
, buf
);
3500 if (info
->strip
== strip_some
3501 && bfd_hash_lookup (info
->keep_hash
, name
, false, false) == NULL
)
3504 if (info
->discard
== discard_l
3505 && !EXTERN_SYM_P (isym
->n_sclass
)
3506 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
)
3507 && bfd_is_local_label_name (input_bfd
, name
))
3514 /* Lay out the .loader section, filling in the header and the import paths.
3515 LIBPATH is as for bfd_xcoff_size_dynamic_sections. */
3518 xcoff_build_loader_section (struct xcoff_loader_info
*ldinfo
,
3519 const char *libpath
)
3522 struct xcoff_link_hash_table
*htab
;
3523 struct internal_ldhdr
*ldhdr
;
3524 struct xcoff_import_file
*fl
;
3525 bfd_size_type stoff
;
3526 size_t impsize
, impcount
;
3530 /* Work out the size of the import file names. Each import file ID
3531 consists of three null terminated strings: the path, the file
3532 name, and the archive member name. The first entry in the list
3533 of names is the path to use to find objects, which the linker has
3534 passed in as the libpath argument. For some reason, the path
3535 entry in the other import file names appears to always be empty. */
3536 output_bfd
= ldinfo
->output_bfd
;
3537 htab
= xcoff_hash_table (ldinfo
->info
);
3538 impsize
= strlen (libpath
) + 3;
3540 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3543 impsize
+= (strlen (fl
->path
)
3545 + strlen (fl
->member
)
3549 /* Set up the .loader section header. */
3550 ldhdr
= &htab
->ldhdr
;
3551 ldhdr
->l_version
= bfd_xcoff_ldhdr_version(output_bfd
);
3552 ldhdr
->l_nsyms
= ldinfo
->ldsym_count
;
3553 ldhdr
->l_nreloc
= htab
->ldrel_count
;
3554 ldhdr
->l_istlen
= impsize
;
3555 ldhdr
->l_nimpid
= impcount
;
3556 ldhdr
->l_impoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3557 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
)
3558 + ldhdr
->l_nreloc
* bfd_xcoff_ldrelsz (output_bfd
));
3559 ldhdr
->l_stlen
= ldinfo
->string_size
;
3560 stoff
= ldhdr
->l_impoff
+ impsize
;
3561 if (ldinfo
->string_size
== 0)
3564 ldhdr
->l_stoff
= stoff
;
3566 /* 64 bit elements to ldhdr
3567 The swap out routine for 32 bit will ignore them.
3568 Nothing fancy, symbols come after the header and relocs come
3570 ldhdr
->l_symoff
= bfd_xcoff_ldhdrsz (output_bfd
);
3571 ldhdr
->l_rldoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3572 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
));
3574 /* We now know the final size of the .loader section. Allocate
3576 lsec
= htab
->loader_section
;
3577 lsec
->size
= stoff
+ ldhdr
->l_stlen
;
3578 lsec
->contents
= bfd_zalloc (output_bfd
, lsec
->size
);
3579 if (lsec
->contents
== NULL
)
3582 /* Set up the header. */
3583 bfd_xcoff_swap_ldhdr_out (output_bfd
, ldhdr
, lsec
->contents
);
3585 /* Set up the import file names. */
3586 out
= (char *) lsec
->contents
+ ldhdr
->l_impoff
;
3587 strcpy (out
, libpath
);
3588 out
+= strlen (libpath
) + 1;
3591 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3596 while ((*out
++ = *s
++) != '\0')
3599 while ((*out
++ = *s
++) != '\0')
3602 while ((*out
++ = *s
++) != '\0')
3606 BFD_ASSERT ((bfd_size_type
) ((bfd_byte
*) out
- lsec
->contents
) == stoff
);
3608 /* Set up the symbol string table. */
3609 if (ldinfo
->string_size
> 0)
3611 memcpy (out
, ldinfo
->strings
, ldinfo
->string_size
);
3612 free (ldinfo
->strings
);
3613 ldinfo
->strings
= NULL
;
3616 /* We can't set up the symbol table or the relocs yet, because we
3617 don't yet know the final position of the various sections. The
3618 .loader symbols are written out when the corresponding normal
3619 symbols are written out in xcoff_link_input_bfd or
3620 xcoff_write_global_symbol. The .loader relocs are written out
3621 when the corresponding normal relocs are handled in
3622 xcoff_link_input_bfd. */
3627 /* Build the .loader section. This is called by the XCOFF linker
3628 emulation before_allocation routine. We must set the size of the
3629 .loader section before the linker lays out the output file.
3630 LIBPATH is the library path to search for shared objects; this is
3631 normally built from the -L arguments passed to the linker. ENTRY
3632 is the name of the entry point symbol (the -e linker option).
3633 FILE_ALIGN is the alignment to use for sections within the file
3634 (the -H linker option). MAXSTACK is the maximum stack size (the
3635 -bmaxstack linker option). MAXDATA is the maximum data size (the
3636 -bmaxdata linker option). GC is whether to do garbage collection
3637 (the -bgc linker option). MODTYPE is the module type (the
3638 -bmodtype linker option). TEXTRO is whether the text section must
3639 be read only (the -btextro linker option). AUTO_EXPORT_FLAGS
3640 is a mask of XCOFF_EXPALL and XCOFF_EXPFULL. SPECIAL_SECTIONS
3641 is set by this routine to csects with magic names like _end. */
3644 bfd_xcoff_size_dynamic_sections (bfd
*output_bfd
,
3645 struct bfd_link_info
*info
,
3646 const char *libpath
,
3648 unsigned long file_align
,
3649 unsigned long maxstack
,
3650 unsigned long maxdata
,
3654 unsigned int auto_export_flags
,
3655 asection
**special_sections
,
3658 struct xcoff_loader_info ldinfo
;
3662 struct bfd_strtab_hash
*debug_strtab
;
3663 bfd_byte
*debug_contents
= NULL
;
3666 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3668 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3669 special_sections
[i
] = NULL
;
3673 ldinfo
.failed
= false;
3674 ldinfo
.output_bfd
= output_bfd
;
3676 ldinfo
.auto_export_flags
= auto_export_flags
;
3677 ldinfo
.ldsym_count
= 0;
3678 ldinfo
.string_size
= 0;
3679 ldinfo
.strings
= NULL
;
3680 ldinfo
.string_alc
= 0;
3682 xcoff_data (output_bfd
)->maxstack
= maxstack
;
3683 xcoff_data (output_bfd
)->maxdata
= maxdata
;
3684 xcoff_data (output_bfd
)->modtype
= modtype
;
3686 xcoff_hash_table (info
)->file_align
= file_align
;
3687 xcoff_hash_table (info
)->textro
= textro
;
3688 xcoff_hash_table (info
)->rtld
= rtld
;
3691 if (xcoff_hash_table (info
)->loader_section
3692 && (info
->init_function
|| info
->fini_function
|| rtld
))
3694 struct xcoff_link_hash_entry
*hsym
;
3695 struct internal_ldsym
*ldsym
;
3697 hsym
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3698 "__rtinit", false, false, true);
3702 (_("error: undefined symbol __rtinit"));
3706 xcoff_mark_symbol (info
, hsym
);
3707 hsym
->flags
|= (XCOFF_DEF_REGULAR
| XCOFF_RTINIT
);
3709 /* __rtinit initialized. */
3710 amt
= sizeof (* ldsym
);
3711 ldsym
= bfd_malloc (amt
);
3713 ldsym
->l_value
= 0; /* Will be filled in later. */
3714 ldsym
->l_scnum
= 2; /* Data section. */
3715 ldsym
->l_smtype
= XTY_SD
; /* Csect section definition. */
3716 ldsym
->l_smclas
= 5; /* .rw. */
3717 ldsym
->l_ifile
= 0; /* Special system loader symbol. */
3718 ldsym
->l_parm
= 0; /* NA. */
3720 /* Force __rtinit to be the first symbol in the loader symbol table
3721 See xcoff_build_ldsyms
3723 The first 3 symbol table indices are reserved to indicate the data,
3724 text and bss sections. */
3725 BFD_ASSERT (0 == ldinfo
.ldsym_count
);
3728 ldinfo
.ldsym_count
= 1;
3729 hsym
->ldsym
= ldsym
;
3731 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
.output_bfd
, &ldinfo
,
3732 hsym
->ldsym
, hsym
->root
.root
.string
))
3735 /* This symbol is written out by xcoff_write_global_symbol
3736 Set stuff up so xcoff_write_global_symbol logic works. */
3737 hsym
->flags
|= XCOFF_DEF_REGULAR
| XCOFF_MARK
;
3738 hsym
->root
.type
= bfd_link_hash_defined
;
3739 hsym
->root
.u
.def
.value
= 0;
3742 /* Garbage collect unused sections. */
3743 if (bfd_link_relocatable (info
) || !gc
)
3746 xcoff_hash_table (info
)->gc
= false;
3748 /* We still need to call xcoff_mark, in order to set ldrel_count
3750 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3754 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3756 /* We shouldn't unconditionaly mark the TOC section.
3757 The output file should only have a TOC if either
3758 (a) one of the input files did or (b) we end up
3759 creating TOC references as part of the link process. */
3760 if (o
!= xcoff_hash_table (info
)->toc_section
3761 && (o
->flags
& SEC_MARK
) == 0)
3763 if (! xcoff_mark (info
, o
))
3772 && !xcoff_mark_symbol_by_name (info
, entry
, XCOFF_ENTRY
))
3774 if (info
->init_function
!= NULL
3775 && !xcoff_mark_symbol_by_name (info
, info
->init_function
, 0))
3777 if (info
->fini_function
!= NULL
3778 && !xcoff_mark_symbol_by_name (info
, info
->fini_function
, 0))
3780 if (auto_export_flags
!= 0)
3782 xcoff_link_hash_traverse (xcoff_hash_table (info
),
3783 xcoff_mark_auto_exports
, &ldinfo
);
3788 xcoff_hash_table (info
)->gc
= true;
3791 /* Return special sections to the caller. */
3792 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3794 sec
= xcoff_hash_table (info
)->special_sections
[i
];
3798 && (sec
->flags
& SEC_MARK
) == 0)
3801 special_sections
[i
] = sec
;
3804 if (info
->input_bfds
== NULL
)
3805 /* I'm not sure what to do in this bizarre case. */
3808 xcoff_link_hash_traverse (xcoff_hash_table (info
), xcoff_post_gc_symbol
,
3813 if (xcoff_hash_table (info
)->loader_section
3814 && !xcoff_build_loader_section (&ldinfo
, libpath
))
3817 /* Allocate space for the magic sections. */
3818 sec
= xcoff_hash_table (info
)->linkage_section
;
3821 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3822 if (sec
->contents
== NULL
)
3825 sec
= xcoff_hash_table (info
)->toc_section
;
3828 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3829 if (sec
->contents
== NULL
)
3832 sec
= xcoff_hash_table (info
)->descriptor_section
;
3835 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3836 if (sec
->contents
== NULL
)
3840 /* Now that we've done garbage collection, decide which symbols to keep,
3841 and figure out the contents of the .debug section. */
3842 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
3844 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3847 bfd_size_type symcount
;
3850 unsigned int *lineno_counts
;
3851 struct xcoff_link_hash_entry
**sym_hash
;
3852 bfd_byte
*esym
, *esymend
;
3853 bfd_size_type symesz
;
3855 if (sub
->xvec
!= info
->output_bfd
->xvec
)
3858 if ((sub
->flags
& DYNAMIC
) != 0
3859 && !info
->static_link
)
3862 if (! _bfd_coff_get_external_symbols (sub
))
3865 symcount
= obj_raw_syment_count (sub
);
3866 debug_index
= bfd_zalloc (sub
, symcount
* sizeof (long));
3867 if (debug_index
== NULL
)
3869 xcoff_data (sub
)->debug_indices
= debug_index
;
3871 if (info
->strip
== strip_all
3872 || info
->strip
== strip_debugger
3873 || info
->discard
== discard_all
)
3874 /* We're stripping all debugging information, so there's no need
3875 to read SUB's .debug section. */
3879 /* Grab the contents of SUB's .debug section, if any. */
3880 subdeb
= bfd_get_section_by_name (sub
, ".debug");
3881 if (subdeb
!= NULL
&& subdeb
->size
> 0)
3883 /* We use malloc and copy the names into the debug
3884 stringtab, rather than bfd_alloc, because I expect
3885 that, when linking many files together, many of the
3886 strings will be the same. Storing the strings in the
3887 hash table should save space in this case. */
3888 if (!bfd_malloc_and_get_section (sub
, subdeb
, &debug_contents
))
3893 csectpp
= xcoff_data (sub
)->csects
;
3894 lineno_counts
= xcoff_data (sub
)->lineno_counts
;
3895 sym_hash
= obj_xcoff_sym_hashes (sub
);
3896 symesz
= bfd_coff_symesz (sub
);
3897 esym
= (bfd_byte
*) obj_coff_external_syms (sub
);
3898 esymend
= esym
+ symcount
* symesz
;
3900 while (esym
< esymend
)
3902 struct internal_syment sym
;
3903 union internal_auxent aux
;
3908 bfd_coff_swap_sym_in (sub
, esym
, &sym
);
3910 /* Read in the csect information, if any. */
3911 if (CSECT_SYM_P (sym
.n_sclass
))
3913 BFD_ASSERT (sym
.n_numaux
> 0);
3914 bfd_coff_swap_aux_in (sub
, esym
+ symesz
* sym
.n_numaux
,
3915 sym
.n_type
, sym
.n_sclass
,
3916 sym
.n_numaux
- 1, sym
.n_numaux
, &aux
);
3919 /* If this symbol's name is stored in the debug section,
3920 get a pointer to it. */
3921 if (debug_contents
!= NULL
3922 && sym
._n
._n_n
._n_zeroes
== 0
3923 && bfd_coff_symname_in_debug (sub
, &sym
))
3924 name
= (const char *) debug_contents
+ sym
._n
._n_n
._n_offset
;
3928 /* Decide whether to copy this symbol to the output file. */
3930 keep_p
= xcoff_keep_symbol_p (info
, sub
, &sym
, &aux
,
3931 *sym_hash
, csect
, name
);
3936 /* Use a debug_index of -2 to record that a symbol should
3941 /* See whether we should store the symbol name in the
3942 output .debug section. */
3947 indx
= _bfd_stringtab_add (debug_strtab
, name
, true, true);
3948 if (indx
== (bfd_size_type
) -1)
3950 *debug_index
= indx
;
3955 (*sym_hash
)->flags
|= XCOFF_ALLOCATED
;
3956 if (*lineno_counts
> 0)
3957 csect
->output_section
->lineno_count
+= *lineno_counts
;
3960 esym
+= (sym
.n_numaux
+ 1) * symesz
;
3961 csectpp
+= sym
.n_numaux
+ 1;
3962 sym_hash
+= sym
.n_numaux
+ 1;
3963 lineno_counts
+= sym
.n_numaux
+ 1;
3964 debug_index
+= sym
.n_numaux
+ 1;
3969 free (debug_contents
);
3970 debug_contents
= NULL
;
3972 /* Clear the size of subdeb, so that it is not included directly
3973 in the output file. */
3977 if (! info
->keep_memory
)
3979 if (! _bfd_coff_free_symbols (sub
))
3984 if (info
->strip
!= strip_all
)
3985 xcoff_hash_table (info
)->debug_section
->size
=
3986 _bfd_stringtab_size (debug_strtab
);
3991 free (ldinfo
.strings
);
3992 free (debug_contents
);
3997 bfd_xcoff_link_generate_rtinit (bfd
*abfd
,
4002 struct bfd_in_memory
*bim
;
4004 bim
= bfd_malloc ((bfd_size_type
) sizeof (* bim
));
4011 abfd
->link
.next
= 0;
4012 abfd
->format
= bfd_object
;
4013 abfd
->iostream
= (void *) bim
;
4014 abfd
->flags
= BFD_IN_MEMORY
;
4015 abfd
->iovec
= &_bfd_memory_iovec
;
4016 abfd
->direction
= write_direction
;
4020 if (! bfd_xcoff_generate_rtinit (abfd
, init
, fini
, rtld
))
4023 /* need to reset to unknown or it will not be read back in correctly */
4024 abfd
->format
= bfd_unknown
;
4025 abfd
->direction
= read_direction
;
4031 /* Return the section that defines H. Return null if no section does. */
4034 xcoff_symbol_section (struct xcoff_link_hash_entry
*h
)
4036 switch (h
->root
.type
)
4038 case bfd_link_hash_defined
:
4039 case bfd_link_hash_defweak
:
4040 return h
->root
.u
.def
.section
;
4042 case bfd_link_hash_common
:
4043 return h
->root
.u
.c
.p
->section
;
4050 /* Add a .loader relocation for input relocation IREL. If the loader
4051 relocation should be against an output section, HSEC points to the
4052 input section that IREL is against, otherwise HSEC is null. H is the
4053 symbol that IREL is against, or null if it isn't against a global symbol.
4054 REFERENCE_BFD is the bfd to use in error messages about the relocation. */
4057 xcoff_create_ldrel (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
,
4058 asection
*output_section
, bfd
*reference_bfd
,
4059 struct internal_reloc
*irel
, asection
*hsec
,
4060 struct xcoff_link_hash_entry
*h
)
4062 struct internal_ldrel ldrel
;
4064 ldrel
.l_vaddr
= irel
->r_vaddr
;
4067 const char *secname
;
4069 secname
= hsec
->output_section
->name
;
4070 if (strcmp (secname
, ".text") == 0)
4072 else if (strcmp (secname
, ".data") == 0)
4074 else if (strcmp (secname
, ".bss") == 0)
4076 else if (strcmp (secname
, ".tdata") == 0)
4077 ldrel
.l_symndx
= -1;
4078 else if (strcmp (secname
, ".tbss") == 0)
4079 ldrel
.l_symndx
= -2;
4083 /* xgettext:c-format */
4084 (_("%pB: loader reloc in unrecognized section `%s'"),
4085 reference_bfd
, secname
);
4086 bfd_set_error (bfd_error_nonrepresentable_section
);
4095 /* xgettext:c-format */
4096 (_("%pB: `%s' in loader reloc but not loader sym"),
4097 reference_bfd
, h
->root
.root
.string
);
4098 bfd_set_error (bfd_error_bad_value
);
4101 ldrel
.l_symndx
= h
->ldindx
;
4104 ldrel
.l_symndx
= -(bfd_size_type
) 1;
4106 ldrel
.l_rtype
= (irel
->r_size
<< 8) | irel
->r_type
;
4107 ldrel
.l_rsecnm
= output_section
->target_index
;
4108 if (xcoff_hash_table (flinfo
->info
)->textro
4109 && strcmp (output_section
->name
, ".text") == 0)
4112 /* xgettext:c-format */
4113 (_("%pB: loader reloc in read-only section %pA"),
4114 reference_bfd
, output_section
);
4115 bfd_set_error (bfd_error_invalid_operation
);
4118 bfd_xcoff_swap_ldrel_out (output_bfd
, &ldrel
, flinfo
->ldrel
);
4119 flinfo
->ldrel
+= bfd_xcoff_ldrelsz (output_bfd
);
4123 /* Link an input file into the linker output file. This function
4124 handles all the sections and relocations of the input file at once. */
4127 xcoff_link_input_bfd (struct xcoff_final_link_info
*flinfo
,
4131 const char *strings
;
4132 bfd_size_type syment_base
;
4133 unsigned int n_tmask
;
4134 unsigned int n_btshft
;
4136 bfd_size_type isymesz
;
4137 bfd_size_type osymesz
;
4138 bfd_size_type linesz
;
4141 struct xcoff_link_hash_entry
**sym_hash
;
4142 struct internal_syment
*isymp
;
4144 unsigned int *lineno_counts
;
4147 unsigned long output_index
;
4154 /* We can just skip DYNAMIC files, unless this is a static link. */
4155 if ((input_bfd
->flags
& DYNAMIC
) != 0
4156 && ! flinfo
->info
->static_link
)
4159 /* Move all the symbols to the output file. */
4160 output_bfd
= flinfo
->output_bfd
;
4162 syment_base
= obj_raw_syment_count (output_bfd
);
4163 isymesz
= bfd_coff_symesz (input_bfd
);
4164 osymesz
= bfd_coff_symesz (output_bfd
);
4165 linesz
= bfd_coff_linesz (input_bfd
);
4166 BFD_ASSERT (linesz
== bfd_coff_linesz (output_bfd
));
4168 n_tmask
= coff_data (input_bfd
)->local_n_tmask
;
4169 n_btshft
= coff_data (input_bfd
)->local_n_btshft
;
4171 /* Define macros so that ISFCN, et. al., macros work correctly. */
4172 #define N_TMASK n_tmask
4173 #define N_BTSHFT n_btshft
4176 if (! flinfo
->info
->keep_memory
)
4179 if (flinfo
->info
->traditional_format
)
4182 if (! _bfd_coff_get_external_symbols (input_bfd
))
4185 /* Make one pass over the symbols and assign indices to symbols that
4186 we have decided to keep. Also use create .loader symbol information
4187 and update information in hash table entries. */
4188 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4189 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4190 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4191 csectpp
= xcoff_data (input_bfd
)->csects
;
4192 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4193 isymp
= flinfo
->internal_syms
;
4194 indexp
= flinfo
->sym_indices
;
4195 output_index
= syment_base
;
4196 while (esym
< esym_end
)
4198 union internal_auxent aux
;
4202 bfd_coff_swap_sym_in (input_bfd
, (void *) esym
, (void *) isymp
);
4204 /* Read in the csect information, if any. */
4205 if (CSECT_SYM_P (isymp
->n_sclass
))
4207 BFD_ASSERT (isymp
->n_numaux
> 0);
4208 bfd_coff_swap_aux_in (input_bfd
,
4209 (void *) (esym
+ isymesz
* isymp
->n_numaux
),
4210 isymp
->n_type
, isymp
->n_sclass
,
4211 isymp
->n_numaux
- 1, isymp
->n_numaux
,
4214 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
4217 /* If this symbol is in the .loader section, swap out the
4218 .loader symbol information. If this is an external symbol
4219 reference to a defined symbol, though, then wait until we get
4220 to the definition. */
4221 if (EXTERN_SYM_P (isymp
->n_sclass
)
4222 && *sym_hash
!= NULL
4223 && (*sym_hash
)->ldsym
!= NULL
4224 && xcoff_final_definition_p (input_bfd
, *sym_hash
, *csectpp
))
4226 struct xcoff_link_hash_entry
*h
;
4227 struct internal_ldsym
*ldsym
;
4231 if (isymp
->n_scnum
> 0)
4233 ldsym
->l_scnum
= (*csectpp
)->output_section
->target_index
;
4234 ldsym
->l_value
= (isymp
->n_value
4235 + (*csectpp
)->output_section
->vma
4236 + (*csectpp
)->output_offset
4241 ldsym
->l_scnum
= isymp
->n_scnum
;
4242 ldsym
->l_value
= isymp
->n_value
;
4245 ldsym
->l_smtype
= smtyp
;
4246 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
4247 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4248 || (h
->flags
& XCOFF_IMPORT
) != 0)
4249 ldsym
->l_smtype
|= L_IMPORT
;
4250 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
4251 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4252 || (h
->flags
& XCOFF_EXPORT
) != 0)
4253 ldsym
->l_smtype
|= L_EXPORT
;
4254 if ((h
->flags
& XCOFF_ENTRY
) != 0)
4255 ldsym
->l_smtype
|= L_ENTRY
;
4256 if (isymp
->n_sclass
== C_AIX_WEAKEXT
)
4257 ldsym
->l_smtype
|= L_WEAK
;
4259 ldsym
->l_smclas
= aux
.x_csect
.x_smclas
;
4261 if (ldsym
->l_ifile
== (bfd_size_type
) -1)
4263 else if (ldsym
->l_ifile
== 0)
4265 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
4271 if (h
->root
.type
== bfd_link_hash_defined
4272 || h
->root
.type
== bfd_link_hash_defweak
)
4273 impbfd
= h
->root
.u
.def
.section
->owner
;
4274 else if (h
->root
.type
== bfd_link_hash_undefined
4275 || h
->root
.type
== bfd_link_hash_undefweak
)
4276 impbfd
= h
->root
.u
.undef
.abfd
;
4284 BFD_ASSERT (impbfd
->xvec
== flinfo
->output_bfd
->xvec
);
4285 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
4292 BFD_ASSERT (h
->ldindx
>= 0);
4293 bfd_xcoff_swap_ldsym_out (flinfo
->output_bfd
, ldsym
,
4296 * bfd_xcoff_ldsymsz (flinfo
->output_bfd
))));
4299 /* Fill in snentry now that we know the target_index. */
4300 if ((h
->flags
& XCOFF_ENTRY
) != 0
4301 && (h
->root
.type
== bfd_link_hash_defined
4302 || h
->root
.type
== bfd_link_hash_defweak
))
4304 xcoff_data (output_bfd
)->snentry
=
4305 h
->root
.u
.def
.section
->output_section
->target_index
;
4309 add
= 1 + isymp
->n_numaux
;
4311 if (*debug_index
== -2)
4312 /* We've decided to strip this symbol. */
4316 /* Assign the next unused index to this symbol. */
4317 *indexp
= output_index
;
4319 if (EXTERN_SYM_P (isymp
->n_sclass
))
4321 BFD_ASSERT (*sym_hash
!= NULL
);
4322 (*sym_hash
)->indx
= output_index
;
4325 /* If this is a symbol in the TOC which we may have merged
4326 (class XMC_TC), remember the symbol index of the TOC
4328 if (isymp
->n_sclass
== C_HIDEXT
4329 && aux
.x_csect
.x_smclas
== XMC_TC
4330 && *sym_hash
!= NULL
)
4332 BFD_ASSERT (((*sym_hash
)->flags
& XCOFF_SET_TOC
) == 0);
4333 BFD_ASSERT ((*sym_hash
)->toc_section
!= NULL
);
4334 (*sym_hash
)->u
.toc_indx
= output_index
;
4337 output_index
+= add
;
4340 esym
+= add
* isymesz
;
4346 for (--add
; add
> 0; --add
)
4350 /* Now write out the symbols that we decided to keep. */
4352 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4353 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4354 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4355 isymp
= flinfo
->internal_syms
;
4356 indexp
= flinfo
->sym_indices
;
4357 csectpp
= xcoff_data (input_bfd
)->csects
;
4358 lineno_counts
= xcoff_data (input_bfd
)->lineno_counts
;
4359 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4360 outsym
= flinfo
->outsyms
;
4363 while (esym
< esym_end
)
4367 add
= 1 + isymp
->n_numaux
;
4370 esym
+= add
* isymesz
;
4373 struct internal_syment isym
;
4376 /* Adjust the symbol in order to output it. */
4378 if (isym
._n
._n_n
._n_zeroes
== 0
4379 && isym
._n
._n_n
._n_offset
!= 0)
4381 /* This symbol has a long name. Enter it in the string
4382 table we are building. If *debug_index != -1, the
4383 name has already been entered in the .debug section. */
4384 if (*debug_index
>= 0)
4385 isym
._n
._n_n
._n_offset
= *debug_index
;
4391 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, NULL
);
4395 indx
= _bfd_stringtab_add (flinfo
->strtab
, name
, hash
, copy
);
4396 if (indx
== (bfd_size_type
) -1)
4398 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
4402 /* Make __rtinit C_HIDEXT rather than C_EXT. This avoids
4403 multiple definition problems when linking a shared object
4404 statically. (The native linker doesn't enter __rtinit into
4405 the normal table at all, but having a local symbol can make
4406 the objdump output easier to read.) */
4407 if (isym
.n_sclass
== C_EXT
4409 && ((*sym_hash
)->flags
& XCOFF_RTINIT
) != 0)
4410 isym
.n_sclass
= C_HIDEXT
;
4412 /* The value of a C_FILE symbol is the symbol index of the
4413 next C_FILE symbol. The value of the last C_FILE symbol
4414 is -1. We try to get this right, below, just before we
4415 write the symbols out, but in the general case we may
4416 have to write the symbol out twice. */
4417 if (isym
.n_sclass
== C_FILE
)
4419 if (flinfo
->last_file_index
!= -1
4420 && flinfo
->last_file
.n_value
!= (bfd_vma
) *indexp
)
4422 /* We must correct the value of the last C_FILE entry. */
4423 flinfo
->last_file
.n_value
= *indexp
;
4424 if ((bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4426 /* The last C_FILE symbol is in this input file. */
4427 bfd_coff_swap_sym_out (output_bfd
,
4428 (void *) &flinfo
->last_file
,
4429 (void *) (flinfo
->outsyms
4430 + ((flinfo
->last_file_index
4436 /* We have already written out the last C_FILE
4437 symbol. We need to write it out again. We
4438 borrow *outsym temporarily. */
4441 bfd_coff_swap_sym_out (output_bfd
,
4442 (void *) &flinfo
->last_file
,
4445 pos
= obj_sym_filepos (output_bfd
);
4446 pos
+= flinfo
->last_file_index
* osymesz
;
4447 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4448 || (bfd_bwrite (outsym
, osymesz
, output_bfd
)
4454 flinfo
->last_file_index
= *indexp
;
4455 flinfo
->last_file
= isym
;
4458 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4459 into the line numbers. We update the symbol values when
4460 we handle the line numbers. */
4461 if (isym
.n_sclass
== C_BINCL
4462 || isym
.n_sclass
== C_EINCL
)
4464 isym
.n_value
= flinfo
->line_filepos
;
4467 /* The value of a C_BSTAT symbol is the symbol table
4468 index of the containing csect. */
4469 else if (isym
.n_sclass
== C_BSTAT
)
4473 indx
= isym
.n_value
;
4474 if (indx
< obj_raw_syment_count (input_bfd
))
4478 symindx
= flinfo
->sym_indices
[indx
];
4482 isym
.n_value
= symindx
;
4485 else if (isym
.n_sclass
!= C_ESTAT
4486 && isym
.n_sclass
!= C_DECL
4487 && isym
.n_scnum
> 0)
4489 isym
.n_scnum
= (*csectpp
)->output_section
->target_index
;
4490 isym
.n_value
+= ((*csectpp
)->output_section
->vma
4491 + (*csectpp
)->output_offset
4495 /* Output the symbol. */
4496 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
4501 for (i
= 0; i
< isymp
->n_numaux
&& esym
< esym_end
; i
++)
4503 union internal_auxent aux
;
4505 bfd_coff_swap_aux_in (input_bfd
, (void *) esym
, isymp
->n_type
,
4506 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4509 if (isymp
->n_sclass
== C_FILE
)
4511 /* This is the file name (or some comment put in by
4512 the compiler). If it is long, we must put it in
4513 the string table. */
4514 if (aux
.x_file
.x_n
.x_zeroes
== 0
4515 && aux
.x_file
.x_n
.x_offset
!= 0)
4517 const char *filename
;
4520 BFD_ASSERT (aux
.x_file
.x_n
.x_offset
4521 >= STRING_SIZE_SIZE
);
4522 if (strings
== NULL
)
4524 strings
= _bfd_coff_read_string_table (input_bfd
);
4525 if (strings
== NULL
)
4528 if ((bfd_size_type
) aux
.x_file
.x_n
.x_offset
>= obj_coff_strings_len (input_bfd
))
4529 filename
= _("<corrupt>");
4531 filename
= strings
+ aux
.x_file
.x_n
.x_offset
;
4532 indx
= _bfd_stringtab_add (flinfo
->strtab
, filename
,
4534 if (indx
== (bfd_size_type
) -1)
4536 aux
.x_file
.x_n
.x_offset
= STRING_SIZE_SIZE
+ indx
;
4539 else if (CSECT_SYM_P (isymp
->n_sclass
)
4540 && i
+ 1 == isymp
->n_numaux
)
4543 /* We don't support type checking. I don't know if
4545 aux
.x_csect
.x_parmhash
= 0;
4546 /* I don't think anybody uses these fields, but we'd
4547 better clobber them just in case. */
4548 aux
.x_csect
.x_stab
= 0;
4549 aux
.x_csect
.x_snstab
= 0;
4551 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_LD
)
4555 indx
= aux
.x_csect
.x_scnlen
.l
;
4556 if (indx
< obj_raw_syment_count (input_bfd
))
4560 symindx
= flinfo
->sym_indices
[indx
];
4563 aux
.x_csect
.x_scnlen
.l
= 0;
4567 aux
.x_csect
.x_scnlen
.l
= symindx
;
4572 else if (isymp
->n_sclass
!= C_STAT
|| isymp
->n_type
!= T_NULL
)
4576 if (ISFCN (isymp
->n_type
)
4577 || ISTAG (isymp
->n_sclass
)
4578 || isymp
->n_sclass
== C_BLOCK
4579 || isymp
->n_sclass
== C_FCN
)
4581 indx
= aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
;
4583 && indx
< obj_raw_syment_count (input_bfd
))
4585 /* We look forward through the symbol for
4586 the index of the next symbol we are going
4587 to include. I don't know if this is
4589 while (flinfo
->sym_indices
[indx
] < 0
4590 && indx
< obj_raw_syment_count (input_bfd
))
4592 if (indx
>= obj_raw_syment_count (input_bfd
))
4593 indx
= output_index
;
4595 indx
= flinfo
->sym_indices
[indx
];
4596 aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
= indx
;
4601 indx
= aux
.x_sym
.x_tagndx
.l
;
4602 if (indx
> 0 && indx
< obj_raw_syment_count (input_bfd
))
4606 symindx
= flinfo
->sym_indices
[indx
];
4608 aux
.x_sym
.x_tagndx
.l
= 0;
4610 aux
.x_sym
.x_tagndx
.l
= symindx
;
4615 /* Copy over the line numbers, unless we are stripping
4616 them. We do this on a symbol by symbol basis in
4617 order to more easily handle garbage collection. */
4618 if (CSECT_SYM_P (isymp
->n_sclass
)
4620 && isymp
->n_numaux
> 1
4621 && ISFCN (isymp
->n_type
)
4622 && aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
4624 if (*lineno_counts
== 0)
4625 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= 0;
4628 asection
*enclosing
;
4629 unsigned int enc_count
;
4630 bfd_signed_vma linoff
;
4631 struct internal_lineno lin
;
4638 /* Read in the enclosing section's line-number
4639 information, if we haven't already. */
4641 enclosing
= xcoff_section_data (abfd
, o
)->enclosing
;
4642 enc_count
= xcoff_section_data (abfd
, o
)->lineno_count
;
4643 if (oline
!= enclosing
)
4645 pos
= enclosing
->line_filepos
;
4646 amt
= linesz
* enc_count
;
4647 if (bfd_seek (input_bfd
, pos
, SEEK_SET
) != 0
4648 || (bfd_bread (flinfo
->linenos
, amt
, input_bfd
)
4654 /* Copy across the first entry, adjusting its
4656 linoff
= (aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
4657 - enclosing
->line_filepos
);
4658 linp
= flinfo
->linenos
+ linoff
;
4659 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4660 lin
.l_addr
.l_symndx
= *indexp
;
4661 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4663 /* Copy the other entries, adjusting their addresses. */
4664 linpend
= linp
+ *lineno_counts
* linesz
;
4665 offset
= (o
->output_section
->vma
4668 for (linp
+= linesz
; linp
< linpend
; linp
+= linesz
)
4670 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4671 lin
.l_addr
.l_paddr
+= offset
;
4672 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4675 /* Write out the entries we've just processed. */
4676 pos
= (o
->output_section
->line_filepos
4677 + o
->output_section
->lineno_count
* linesz
);
4678 amt
= linesz
* *lineno_counts
;
4679 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4680 || bfd_bwrite (flinfo
->linenos
+ linoff
,
4681 amt
, output_bfd
) != amt
)
4683 o
->output_section
->lineno_count
+= *lineno_counts
;
4685 /* Record the offset of the symbol's line numbers
4686 in the output file. */
4687 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= pos
;
4691 struct internal_syment
*iisp
, *iispend
;
4694 bfd_vma range_start
, range_end
;
4697 /* Update any C_BINCL or C_EINCL symbols
4698 that refer to a line number in the
4699 range we just output. */
4700 iisp
= flinfo
->internal_syms
;
4701 iispend
= iisp
+ obj_raw_syment_count (input_bfd
);
4702 iindp
= flinfo
->sym_indices
;
4703 oos
= flinfo
->outsyms
;
4704 range_start
= enclosing
->line_filepos
+ linoff
;
4705 range_end
= range_start
+ *lineno_counts
* linesz
;
4706 while (iisp
< iispend
)
4709 && (iisp
->n_sclass
== C_BINCL
4710 || iisp
->n_sclass
== C_EINCL
)
4711 && iisp
->n_value
>= range_start
4712 && iisp
->n_value
< range_end
)
4714 struct internal_syment iis
;
4716 bfd_coff_swap_sym_in (output_bfd
, oos
, &iis
);
4717 iis
.n_value
= (iisp
->n_value
4720 bfd_coff_swap_sym_out (output_bfd
,
4725 iiadd
= 1 + iisp
->n_numaux
;
4727 oos
+= iiadd
* osymesz
;
4735 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, isymp
->n_type
,
4736 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4747 lineno_counts
+= add
;
4751 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
4752 symbol will be the first symbol in the next input file. In the
4753 normal case, this will save us from writing out the C_FILE symbol
4755 if (flinfo
->last_file_index
!= -1
4756 && (bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4758 flinfo
->last_file
.n_value
= output_index
;
4759 bfd_coff_swap_sym_out (output_bfd
, (void *) &flinfo
->last_file
,
4760 (void *) (flinfo
->outsyms
4761 + ((flinfo
->last_file_index
- syment_base
)
4765 /* Write the modified symbols to the output file. */
4766 if (outsym
> flinfo
->outsyms
)
4768 file_ptr pos
= obj_sym_filepos (output_bfd
) + syment_base
* osymesz
;
4769 bfd_size_type amt
= outsym
- flinfo
->outsyms
;
4770 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4771 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
4774 BFD_ASSERT ((obj_raw_syment_count (output_bfd
)
4775 + (outsym
- flinfo
->outsyms
) / osymesz
)
4778 obj_raw_syment_count (output_bfd
) = output_index
;
4781 /* Don't let the linker relocation routines discard the symbols. */
4782 keep_syms
= obj_coff_keep_syms (input_bfd
);
4783 obj_coff_keep_syms (input_bfd
) = true;
4785 /* Relocate the contents of each section. */
4786 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4790 if (! o
->linker_mark
)
4791 /* This section was omitted from the link. */
4794 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4796 || (o
->flags
& SEC_IN_MEMORY
) != 0)
4799 /* We have set filepos correctly for the sections we created to
4800 represent csects, so bfd_get_section_contents should work. */
4801 if (coff_section_data (input_bfd
, o
) != NULL
4802 && coff_section_data (input_bfd
, o
)->contents
!= NULL
)
4803 contents
= coff_section_data (input_bfd
, o
)->contents
;
4806 bfd_size_type sz
= o
->rawsize
? o
->rawsize
: o
->size
;
4807 if (!bfd_get_section_contents (input_bfd
, o
, flinfo
->contents
, 0, sz
))
4809 contents
= flinfo
->contents
;
4812 if ((o
->flags
& SEC_RELOC
) != 0)
4815 struct internal_reloc
*internal_relocs
;
4816 struct internal_reloc
*irel
;
4818 struct internal_reloc
*irelend
;
4819 struct xcoff_link_hash_entry
**rel_hash
;
4822 /* Read in the relocs. */
4823 target_index
= o
->output_section
->target_index
;
4824 internal_relocs
= (xcoff_read_internal_relocs
4825 (input_bfd
, o
, false, flinfo
->external_relocs
,
4827 (flinfo
->section_info
[target_index
].relocs
4828 + o
->output_section
->reloc_count
)));
4829 if (internal_relocs
== NULL
)
4832 /* Call processor specific code to relocate the section
4834 if (! bfd_coff_relocate_section (output_bfd
, flinfo
->info
,
4838 flinfo
->internal_syms
,
4839 xcoff_data (input_bfd
)->csects
))
4842 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
4843 irel
= internal_relocs
;
4844 irelend
= irel
+ o
->reloc_count
;
4845 rel_hash
= (flinfo
->section_info
[target_index
].rel_hashes
4846 + o
->output_section
->reloc_count
);
4847 for (; irel
< irelend
; irel
++, rel_hash
++)
4849 struct xcoff_link_hash_entry
*h
= NULL
;
4853 /* Adjust the reloc address and symbol index. */
4855 irel
->r_vaddr
+= offset
;
4857 r_symndx
= irel
->r_symndx
;
4862 h
= obj_xcoff_sym_hashes (input_bfd
)[r_symndx
];
4864 if (r_symndx
!= -1 && flinfo
->info
->strip
!= strip_all
)
4867 && h
->smclas
!= XMC_TD
4868 && (irel
->r_type
== R_TOC
4869 || irel
->r_type
== R_GL
4870 || irel
->r_type
== R_TCL
4871 || irel
->r_type
== R_TRL
4872 || irel
->r_type
== R_TRLA
))
4874 /* This is a TOC relative reloc with a symbol
4875 attached. The symbol should be the one which
4876 this reloc is for. We want to make this
4877 reloc against the TOC address of the symbol,
4878 not the symbol itself. */
4879 BFD_ASSERT (h
->toc_section
!= NULL
);
4880 BFD_ASSERT ((h
->flags
& XCOFF_SET_TOC
) == 0);
4881 if (h
->u
.toc_indx
!= -1)
4882 irel
->r_symndx
= h
->u
.toc_indx
;
4885 struct xcoff_toc_rel_hash
*n
;
4886 struct xcoff_link_section_info
*si
;
4890 n
= bfd_alloc (flinfo
->output_bfd
, amt
);
4893 si
= flinfo
->section_info
+ target_index
;
4894 n
->next
= si
->toc_rel_hashes
;
4897 si
->toc_rel_hashes
= n
;
4902 /* This is a global symbol. */
4904 irel
->r_symndx
= h
->indx
;
4907 /* This symbol is being written at the end
4908 of the file, and we do not yet know the
4909 symbol index. We save the pointer to the
4910 hash table entry in the rel_hash list.
4911 We set the indx field to -2 to indicate
4912 that this symbol must not be stripped. */
4921 indx
= flinfo
->sym_indices
[r_symndx
];
4925 struct internal_syment
*is
;
4927 /* Relocations against a TC0 TOC anchor are
4928 automatically transformed to be against
4929 the TOC anchor in the output file. */
4930 is
= flinfo
->internal_syms
+ r_symndx
;
4931 if (is
->n_sclass
== C_HIDEXT
4932 && is
->n_numaux
> 0)
4935 union internal_auxent aux
;
4939 obj_coff_external_syms (input_bfd
))
4940 + ((r_symndx
+ is
->n_numaux
)
4942 bfd_coff_swap_aux_in (input_bfd
, auxptr
,
4943 is
->n_type
, is
->n_sclass
,
4947 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_SD
4948 && aux
.x_csect
.x_smclas
== XMC_TC0
)
4949 indx
= flinfo
->toc_symindx
;
4954 irel
->r_symndx
= indx
;
4958 struct internal_syment
*is
;
4961 char buf
[SYMNMLEN
+ 1];
4963 /* This reloc is against a symbol we are
4964 stripping. It would be possible to handle
4965 this case, but I don't think it's worth it. */
4966 is
= flinfo
->internal_syms
+ r_symndx
;
4968 if (is
->n_sclass
!= C_DWARF
)
4970 name
= (_bfd_coff_internal_syment_name
4971 (input_bfd
, is
, buf
));
4976 (*flinfo
->info
->callbacks
->unattached_reloc
)
4977 (flinfo
->info
, name
,
4978 input_bfd
, o
, irel
->r_vaddr
);
4984 if ((o
->flags
& SEC_DEBUGGING
) == 0
4985 && xcoff_need_ldrel_p (flinfo
->info
, irel
, h
))
4992 sec
= xcoff_data (input_bfd
)->csects
[r_symndx
];
4994 sec
= xcoff_symbol_section (h
);
4995 if (!xcoff_create_ldrel (output_bfd
, flinfo
,
4996 o
->output_section
, input_bfd
,
5002 o
->output_section
->reloc_count
+= o
->reloc_count
;
5005 /* Write out the modified section contents. */
5006 if (! bfd_set_section_contents (output_bfd
, o
->output_section
,
5007 contents
, (file_ptr
) o
->output_offset
,
5012 obj_coff_keep_syms (input_bfd
) = keep_syms
;
5014 if (! flinfo
->info
->keep_memory
)
5016 if (! _bfd_coff_free_symbols (input_bfd
))
5023 obj_coff_keep_syms (input_bfd
) = keep_syms
;
5030 /* Sort relocs by VMA. This is called via qsort. */
5033 xcoff_sort_relocs (const void * p1
, const void * p2
)
5035 const struct internal_reloc
*r1
= (const struct internal_reloc
*) p1
;
5036 const struct internal_reloc
*r2
= (const struct internal_reloc
*) p2
;
5038 if (r1
->r_vaddr
> r2
->r_vaddr
)
5040 else if (r1
->r_vaddr
< r2
->r_vaddr
)
5046 /* Return true if section SEC is a TOC section. */
5049 xcoff_toc_section_p (asection
*sec
)
5054 if (name
[0] == '.' && name
[1] == 't')
5058 if (name
[3] == '0' && name
[4] == 0)
5063 if (name
[2] == 'd' && name
[3] == 0)
5069 /* See if the link requires a TOC (it usually does!). If so, find a
5070 good place to put the TOC anchor csect, and write out the associated
5074 xcoff_find_tc0 (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
)
5076 bfd_vma toc_start
, toc_end
, start
, end
, best_address
;
5080 struct internal_syment irsym
;
5081 union internal_auxent iraux
;
5085 /* Set [TOC_START, TOC_END) to the range of the TOC. Record the
5086 index of a csect at the beginning of the TOC. */
5087 toc_start
= ~(bfd_vma
) 0;
5090 for (input_bfd
= flinfo
->info
->input_bfds
;
5092 input_bfd
= input_bfd
->link
.next
)
5093 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5094 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5096 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5097 if (toc_start
> start
)
5100 section_index
= sec
->output_section
->target_index
;
5103 end
= start
+ sec
->size
;
5108 /* There's no need for a TC0 symbol if we don't have a TOC. */
5109 if (toc_end
< toc_start
)
5111 xcoff_data (output_bfd
)->toc
= toc_start
;
5115 if (toc_end
- toc_start
< 0x8000)
5116 /* Every TOC csect can be accessed from TOC_START. */
5117 best_address
= toc_start
;
5120 /* Find the lowest TOC csect that is still within range of TOC_END. */
5121 best_address
= toc_end
;
5122 for (input_bfd
= flinfo
->info
->input_bfds
;
5124 input_bfd
= input_bfd
->link
.next
)
5125 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5126 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5128 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5129 if (start
< best_address
5130 && start
+ 0x8000 >= toc_end
)
5132 best_address
= start
;
5133 section_index
= sec
->output_section
->target_index
;
5137 /* Make sure that the start of the TOC is also within range. */
5138 if (best_address
> toc_start
+ 0x8000)
5141 (_("TOC overflow: %#" PRIx64
" > 0x10000; try -mminimal-toc "
5143 (uint64_t) (toc_end
- toc_start
));
5144 bfd_set_error (bfd_error_file_too_big
);
5149 /* Record the chosen TOC value. */
5150 flinfo
->toc_symindx
= obj_raw_syment_count (output_bfd
);
5151 xcoff_data (output_bfd
)->toc
= best_address
;
5152 xcoff_data (output_bfd
)->sntoc
= section_index
;
5154 /* Fill out the TC0 symbol. */
5155 if (!bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5158 irsym
.n_value
= best_address
;
5159 irsym
.n_scnum
= section_index
;
5160 irsym
.n_sclass
= C_HIDEXT
;
5161 irsym
.n_type
= T_NULL
;
5163 bfd_coff_swap_sym_out (output_bfd
, &irsym
, flinfo
->outsyms
);
5165 /* Fill out the auxiliary csect information. */
5166 memset (&iraux
, 0, sizeof iraux
);
5167 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5168 iraux
.x_csect
.x_smclas
= XMC_TC0
;
5169 iraux
.x_csect
.x_scnlen
.l
= 0;
5170 bfd_coff_swap_aux_out (output_bfd
, &iraux
, T_NULL
, C_HIDEXT
, 0, 1,
5171 flinfo
->outsyms
+ bfd_coff_symesz (output_bfd
));
5173 /* Write the contents to the file. */
5174 pos
= obj_sym_filepos (output_bfd
);
5175 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5176 size
= 2 * bfd_coff_symesz (output_bfd
);
5177 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5178 || bfd_bwrite (flinfo
->outsyms
, size
, output_bfd
) != size
)
5180 obj_raw_syment_count (output_bfd
) += 2;
5185 /* Write out a non-XCOFF global symbol. */
5188 xcoff_write_global_symbol (struct bfd_hash_entry
*bh
, void * inf
)
5190 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) bh
;
5191 struct xcoff_final_link_info
*flinfo
= (struct xcoff_final_link_info
*) inf
;
5194 struct internal_syment isym
;
5195 union internal_auxent aux
;
5200 output_bfd
= flinfo
->output_bfd
;
5201 outsym
= flinfo
->outsyms
;
5203 if (h
->root
.type
== bfd_link_hash_warning
)
5205 h
= (struct xcoff_link_hash_entry
*) h
->root
.u
.i
.link
;
5206 if (h
->root
.type
== bfd_link_hash_new
)
5210 /* If this symbol was garbage collected, just skip it. */
5211 if (xcoff_hash_table (flinfo
->info
)->gc
5212 && (h
->flags
& XCOFF_MARK
) == 0)
5215 /* If we need a .loader section entry, write it out. */
5216 if (h
->ldsym
!= NULL
)
5218 struct internal_ldsym
*ldsym
;
5223 if (h
->root
.type
== bfd_link_hash_undefined
5224 || h
->root
.type
== bfd_link_hash_undefweak
)
5228 ldsym
->l_scnum
= N_UNDEF
;
5229 ldsym
->l_smtype
= XTY_ER
;
5230 impbfd
= h
->root
.u
.undef
.abfd
;
5233 else if (h
->root
.type
== bfd_link_hash_defined
5234 || h
->root
.type
== bfd_link_hash_defweak
)
5238 sec
= h
->root
.u
.def
.section
;
5239 ldsym
->l_value
= (sec
->output_section
->vma
5240 + sec
->output_offset
5241 + h
->root
.u
.def
.value
);
5242 ldsym
->l_scnum
= sec
->output_section
->target_index
;
5243 ldsym
->l_smtype
= XTY_SD
;
5244 impbfd
= sec
->owner
;
5250 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
5251 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5252 || (h
->flags
& XCOFF_IMPORT
) != 0)
5254 Import symbols are defined so the check above will make
5255 the l_smtype XTY_SD. But this is not correct, it should
5257 ldsym
->l_smtype
|= L_IMPORT
;
5259 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
5260 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5261 || (h
->flags
& XCOFF_EXPORT
) != 0)
5262 ldsym
->l_smtype
|= L_EXPORT
;
5264 if ((h
->flags
& XCOFF_ENTRY
) != 0)
5265 ldsym
->l_smtype
|= L_ENTRY
;
5267 if ((h
->flags
& XCOFF_RTINIT
) != 0)
5268 ldsym
->l_smtype
= XTY_SD
;
5270 ldsym
->l_smclas
= h
->smclas
;
5272 if (ldsym
->l_smtype
& L_IMPORT
)
5274 if ((h
->root
.type
== bfd_link_hash_defined
5275 || h
->root
.type
== bfd_link_hash_defweak
)
5276 && (h
->root
.u
.def
.value
!= 0))
5277 ldsym
->l_smclas
= XMC_XO
;
5279 else if ((h
->flags
& (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
)) ==
5280 (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
))
5281 ldsym
->l_smclas
= XMC_SV3264
;
5283 else if (h
->flags
& XCOFF_SYSCALL32
)
5284 ldsym
->l_smclas
= XMC_SV
;
5286 else if (h
->flags
& XCOFF_SYSCALL64
)
5287 ldsym
->l_smclas
= XMC_SV64
;
5290 if (ldsym
->l_ifile
== -(bfd_size_type
) 1)
5294 else if (ldsym
->l_ifile
== 0)
5296 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
5298 else if (impbfd
== NULL
)
5302 BFD_ASSERT (impbfd
->xvec
== output_bfd
->xvec
);
5303 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
5309 BFD_ASSERT (h
->ldindx
>= 0);
5311 bfd_xcoff_swap_ldsym_out (output_bfd
, ldsym
,
5314 * bfd_xcoff_ldsymsz(flinfo
->output_bfd
)));
5318 /* If this symbol needs global linkage code, write it out. */
5319 if (h
->root
.type
== bfd_link_hash_defined
5320 && (h
->root
.u
.def
.section
5321 == xcoff_hash_table (flinfo
->info
)->linkage_section
))
5327 p
= h
->root
.u
.def
.section
->contents
+ h
->root
.u
.def
.value
;
5329 /* The first instruction in the global linkage code loads a
5330 specific TOC element. */
5331 tocoff
= (h
->descriptor
->toc_section
->output_section
->vma
5332 + h
->descriptor
->toc_section
->output_offset
5333 - xcoff_data (output_bfd
)->toc
);
5335 if ((h
->descriptor
->flags
& XCOFF_SET_TOC
) != 0)
5336 tocoff
+= h
->descriptor
->u
.toc_offset
;
5338 /* The first instruction in the glink code needs to be
5339 cooked to hold the correct offset in the toc. The
5340 rest are just output raw. */
5341 bfd_put_32 (output_bfd
,
5342 bfd_xcoff_glink_code(output_bfd
, 0) | (tocoff
& 0xffff), p
);
5344 /* Start with i == 1 to get past the first instruction done above
5345 The /4 is because the glink code is in bytes and we are going
5347 for (i
= 1; i
< bfd_xcoff_glink_code_size(output_bfd
) / 4; i
++)
5348 bfd_put_32 (output_bfd
,
5349 (bfd_vma
) bfd_xcoff_glink_code(output_bfd
, i
),
5353 /* If we created a TOC entry for this symbol, write out the required
5355 if ((h
->flags
& XCOFF_SET_TOC
) != 0)
5360 struct internal_reloc
*irel
;
5361 struct internal_syment irsym
;
5362 union internal_auxent iraux
;
5364 tocsec
= h
->toc_section
;
5365 osec
= tocsec
->output_section
;
5366 oindx
= osec
->target_index
;
5367 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5368 irel
->r_vaddr
= (osec
->vma
5369 + tocsec
->output_offset
5373 irel
->r_symndx
= h
->indx
;
5377 irel
->r_symndx
= obj_raw_syment_count (output_bfd
);
5380 BFD_ASSERT (h
->ldindx
>= 0);
5382 /* Initialize the aux union here instead of closer to when it is
5383 written out below because the length of the csect depends on
5384 whether the output is 32 or 64 bit. */
5385 memset (&iraux
, 0, sizeof iraux
);
5386 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5387 /* iraux.x_csect.x_scnlen.l = 4 or 8, see below. */
5388 iraux
.x_csect
.x_smclas
= XMC_TC
;
5390 /* 32 bit uses a 32 bit R_POS to do the relocations
5391 64 bit uses a 64 bit R_POS to do the relocations
5393 Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit
5395 Which one is determined by the backend. */
5396 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5399 iraux
.x_csect
.x_scnlen
.l
= 8;
5401 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5404 iraux
.x_csect
.x_scnlen
.l
= 4;
5409 irel
->r_type
= R_POS
;
5410 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5411 ++osec
->reloc_count
;
5413 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5414 output_bfd
, irel
, NULL
, h
))
5417 /* We need to emit a symbol to define a csect which holds
5419 if (flinfo
->info
->strip
!= strip_all
)
5421 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
,
5423 &irsym
, h
->root
.root
.string
);
5427 irsym
.n_value
= irel
->r_vaddr
;
5428 irsym
.n_scnum
= osec
->target_index
;
5429 irsym
.n_sclass
= C_HIDEXT
;
5430 irsym
.n_type
= T_NULL
;
5433 bfd_coff_swap_sym_out (output_bfd
, (void *) &irsym
, (void *) outsym
);
5434 outsym
+= bfd_coff_symesz (output_bfd
);
5436 /* Note : iraux is initialized above. */
5437 bfd_coff_swap_aux_out (output_bfd
, (void *) &iraux
, T_NULL
, C_HIDEXT
,
5438 0, 1, (void *) outsym
);
5439 outsym
+= bfd_coff_auxesz (output_bfd
);
5443 /* We aren't going to write out the symbols below, so we
5444 need to write them out now. */
5445 pos
= obj_sym_filepos (output_bfd
);
5446 pos
+= (obj_raw_syment_count (output_bfd
)
5447 * bfd_coff_symesz (output_bfd
));
5448 amt
= outsym
- flinfo
->outsyms
;
5449 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5450 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5452 obj_raw_syment_count (output_bfd
) +=
5453 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5455 outsym
= flinfo
->outsyms
;
5460 /* If this symbol is a specially defined function descriptor, write
5461 it out. The first word is the address of the function code
5462 itself, the second word is the address of the TOC, and the third
5466 The addresses for the 32 bit will take 4 bytes and the addresses
5467 for 64 bit will take 8 bytes. Similar for the relocs. This type
5468 of logic was also done above to create a TOC entry in
5469 xcoff_write_global_symbol. */
5470 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
5471 && h
->root
.type
== bfd_link_hash_defined
5472 && (h
->root
.u
.def
.section
5473 == xcoff_hash_table (flinfo
->info
)->descriptor_section
))
5479 struct xcoff_link_hash_entry
*hentry
;
5481 struct internal_reloc
*irel
;
5483 unsigned int reloc_size
, byte_size
;
5485 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5490 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5498 sec
= h
->root
.u
.def
.section
;
5499 osec
= sec
->output_section
;
5500 oindx
= osec
->target_index
;
5501 p
= sec
->contents
+ h
->root
.u
.def
.value
;
5503 hentry
= h
->descriptor
;
5504 BFD_ASSERT (hentry
!= NULL
5505 && (hentry
->root
.type
== bfd_link_hash_defined
5506 || hentry
->root
.type
== bfd_link_hash_defweak
));
5507 esec
= hentry
->root
.u
.def
.section
;
5509 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5510 irel
->r_vaddr
= (osec
->vma
5511 + sec
->output_offset
5512 + h
->root
.u
.def
.value
);
5513 irel
->r_symndx
= esec
->output_section
->target_index
;
5514 irel
->r_type
= R_POS
;
5515 irel
->r_size
= reloc_size
;
5516 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5517 ++osec
->reloc_count
;
5519 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5520 output_bfd
, irel
, esec
, NULL
))
5523 /* There are three items to write out,
5524 the address of the code
5525 the address of the toc anchor
5526 the environment pointer.
5527 We are ignoring the environment pointer. So set it to zero. */
5528 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5530 bfd_put_64 (output_bfd
,
5531 (esec
->output_section
->vma
+ esec
->output_offset
5532 + hentry
->root
.u
.def
.value
),
5534 bfd_put_64 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 8);
5535 bfd_put_64 (output_bfd
, (bfd_vma
) 0, p
+ 16);
5540 This logic was already called above so the error case where
5541 the backend is neither has already been checked. */
5542 bfd_put_32 (output_bfd
,
5543 (esec
->output_section
->vma
+ esec
->output_offset
5544 + hentry
->root
.u
.def
.value
),
5546 bfd_put_32 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 4);
5547 bfd_put_32 (output_bfd
, (bfd_vma
) 0, p
+ 8);
5550 tsec
= coff_section_from_bfd_index (output_bfd
,
5551 xcoff_data (output_bfd
)->sntoc
);
5554 irel
->r_vaddr
= (osec
->vma
5555 + sec
->output_offset
5556 + h
->root
.u
.def
.value
5558 irel
->r_symndx
= tsec
->output_section
->target_index
;
5559 irel
->r_type
= R_POS
;
5560 irel
->r_size
= reloc_size
;
5561 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5562 ++osec
->reloc_count
;
5564 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5565 output_bfd
, irel
, tsec
, NULL
))
5569 if (h
->indx
>= 0 || flinfo
->info
->strip
== strip_all
)
5571 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5576 && (flinfo
->info
->strip
== strip_all
5577 || (flinfo
->info
->strip
== strip_some
5578 && bfd_hash_lookup (flinfo
->info
->keep_hash
, h
->root
.root
.string
,
5579 false, false) == NULL
)))
5581 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5586 && (h
->flags
& (XCOFF_REF_REGULAR
| XCOFF_DEF_REGULAR
)) == 0)
5588 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5592 memset (&aux
, 0, sizeof aux
);
5594 h
->indx
= obj_raw_syment_count (output_bfd
);
5596 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5597 &isym
, h
->root
.root
.string
);
5601 if (h
->root
.type
== bfd_link_hash_undefined
5602 || h
->root
.type
== bfd_link_hash_undefweak
)
5605 isym
.n_scnum
= N_UNDEF
;
5606 if (h
->root
.type
== bfd_link_hash_undefweak
5607 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5608 isym
.n_sclass
= C_WEAKEXT
;
5610 isym
.n_sclass
= C_EXT
;
5611 aux
.x_csect
.x_smtyp
= XTY_ER
;
5613 else if ((h
->root
.type
== bfd_link_hash_defined
5614 || h
->root
.type
== bfd_link_hash_defweak
)
5615 && h
->smclas
== XMC_XO
)
5617 BFD_ASSERT (bfd_is_abs_symbol (&h
->root
));
5618 isym
.n_value
= h
->root
.u
.def
.value
;
5619 isym
.n_scnum
= N_UNDEF
;
5620 if (h
->root
.type
== bfd_link_hash_defweak
5621 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5622 isym
.n_sclass
= C_WEAKEXT
;
5624 isym
.n_sclass
= C_EXT
;
5625 aux
.x_csect
.x_smtyp
= XTY_ER
;
5627 else if (h
->root
.type
== bfd_link_hash_defined
5628 || h
->root
.type
== bfd_link_hash_defweak
)
5630 struct xcoff_link_size_list
*l
;
5632 isym
.n_value
= (h
->root
.u
.def
.section
->output_section
->vma
5633 + h
->root
.u
.def
.section
->output_offset
5634 + h
->root
.u
.def
.value
);
5635 if (bfd_is_abs_section (h
->root
.u
.def
.section
->output_section
))
5636 isym
.n_scnum
= N_ABS
;
5638 isym
.n_scnum
= h
->root
.u
.def
.section
->output_section
->target_index
;
5639 isym
.n_sclass
= C_HIDEXT
;
5640 aux
.x_csect
.x_smtyp
= XTY_SD
;
5642 if ((h
->flags
& XCOFF_HAS_SIZE
) != 0)
5644 for (l
= xcoff_hash_table (flinfo
->info
)->size_list
;
5650 aux
.x_csect
.x_scnlen
.l
= l
->size
;
5656 else if (h
->root
.type
== bfd_link_hash_common
)
5658 isym
.n_value
= (h
->root
.u
.c
.p
->section
->output_section
->vma
5659 + h
->root
.u
.c
.p
->section
->output_offset
);
5660 isym
.n_scnum
= h
->root
.u
.c
.p
->section
->output_section
->target_index
;
5661 isym
.n_sclass
= C_EXT
;
5662 aux
.x_csect
.x_smtyp
= XTY_CM
;
5663 aux
.x_csect
.x_scnlen
.l
= h
->root
.u
.c
.size
;
5668 isym
.n_type
= T_NULL
;
5671 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5672 outsym
+= bfd_coff_symesz (output_bfd
);
5674 aux
.x_csect
.x_smclas
= h
->smclas
;
5675 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, isym
.n_sclass
, 0, 1,
5677 outsym
+= bfd_coff_auxesz (output_bfd
);
5679 if ((h
->root
.type
== bfd_link_hash_defined
5680 || h
->root
.type
== bfd_link_hash_defweak
)
5681 && h
->smclas
!= XMC_XO
)
5683 /* We just output an SD symbol. Now output an LD symbol. */
5686 if (h
->root
.type
== bfd_link_hash_defweak
5687 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5688 isym
.n_sclass
= C_WEAKEXT
;
5690 isym
.n_sclass
= C_EXT
;
5691 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5692 outsym
+= bfd_coff_symesz (output_bfd
);
5694 aux
.x_csect
.x_smtyp
= XTY_LD
;
5695 aux
.x_csect
.x_scnlen
.l
= obj_raw_syment_count (output_bfd
);
5696 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, C_EXT
, 0, 1,
5698 outsym
+= bfd_coff_auxesz (output_bfd
);
5701 pos
= obj_sym_filepos (output_bfd
);
5702 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5703 amt
= outsym
- flinfo
->outsyms
;
5704 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5705 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5707 obj_raw_syment_count (output_bfd
) +=
5708 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5713 /* Handle a link order which is supposed to generate a reloc. */
5716 xcoff_reloc_link_order (bfd
*output_bfd
,
5717 struct xcoff_final_link_info
*flinfo
,
5718 asection
*output_section
,
5719 struct bfd_link_order
*link_order
)
5721 reloc_howto_type
*howto
;
5722 struct xcoff_link_hash_entry
*h
;
5726 struct internal_reloc
*irel
;
5727 struct xcoff_link_hash_entry
**rel_hash_ptr
;
5729 if (link_order
->type
== bfd_section_reloc_link_order
)
5730 /* We need to somehow locate a symbol in the right section. The
5731 symbol must either have a value of zero, or we must adjust
5732 the addend by the value of the symbol. FIXME: Write this
5733 when we need it. The old linker couldn't handle this anyhow. */
5736 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5739 bfd_set_error (bfd_error_bad_value
);
5743 h
= ((struct xcoff_link_hash_entry
*)
5744 bfd_wrapped_link_hash_lookup (output_bfd
, flinfo
->info
,
5745 link_order
->u
.reloc
.p
->u
.name
,
5746 false, false, true));
5749 (*flinfo
->info
->callbacks
->unattached_reloc
)
5750 (flinfo
->info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
5754 hsec
= xcoff_symbol_section (h
);
5755 if (h
->root
.type
== bfd_link_hash_defined
5756 || h
->root
.type
== bfd_link_hash_defweak
)
5757 hval
= h
->root
.u
.def
.value
;
5761 addend
= link_order
->u
.reloc
.p
->addend
;
5763 addend
+= (hsec
->output_section
->vma
5764 + hsec
->output_offset
5771 bfd_reloc_status_type rstat
;
5774 size
= bfd_get_reloc_size (howto
);
5775 buf
= bfd_zmalloc (size
);
5776 if (buf
== NULL
&& size
!= 0)
5779 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5785 case bfd_reloc_outofrange
:
5787 case bfd_reloc_overflow
:
5788 (*flinfo
->info
->callbacks
->reloc_overflow
)
5789 (flinfo
->info
, NULL
, link_order
->u
.reloc
.p
->u
.name
,
5790 howto
->name
, addend
, NULL
, NULL
, (bfd_vma
) 0);
5793 ok
= bfd_set_section_contents (output_bfd
, output_section
, (void *) buf
,
5794 (file_ptr
) link_order
->offset
, size
);
5800 /* Store the reloc information in the right place. It will get
5801 swapped and written out at the end of the final_link routine. */
5802 irel
= (flinfo
->section_info
[output_section
->target_index
].relocs
5803 + output_section
->reloc_count
);
5804 rel_hash_ptr
= (flinfo
->section_info
[output_section
->target_index
].rel_hashes
5805 + output_section
->reloc_count
);
5807 memset (irel
, 0, sizeof (struct internal_reloc
));
5808 *rel_hash_ptr
= NULL
;
5810 irel
->r_vaddr
= output_section
->vma
+ link_order
->offset
;
5813 irel
->r_symndx
= h
->indx
;
5816 /* Set the index to -2 to force this symbol to get written out. */
5822 irel
->r_type
= howto
->type
;
5823 irel
->r_size
= howto
->bitsize
- 1;
5824 if (howto
->complain_on_overflow
== complain_overflow_signed
)
5825 irel
->r_size
|= 0x80;
5827 ++output_section
->reloc_count
;
5829 /* Now output the reloc to the .loader section. */
5830 if (xcoff_hash_table (flinfo
->info
)->loader_section
)
5832 if (!xcoff_create_ldrel (output_bfd
, flinfo
, output_section
,
5833 output_bfd
, irel
, hsec
, h
))
5840 /* Do the final link step. */
5843 _bfd_xcoff_bfd_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5845 bfd_size_type symesz
;
5846 struct xcoff_final_link_info flinfo
;
5848 struct bfd_link_order
*p
;
5849 bfd_size_type max_contents_size
;
5850 bfd_size_type max_sym_count
;
5851 bfd_size_type max_lineno_count
;
5852 bfd_size_type max_reloc_count
;
5853 bfd_size_type max_output_reloc_count
;
5854 file_ptr rel_filepos
;
5856 file_ptr line_filepos
;
5857 unsigned int linesz
;
5859 bfd_byte
*external_relocs
= NULL
;
5860 char strbuf
[STRING_SIZE_SIZE
];
5864 if (bfd_link_pic (info
))
5865 abfd
->flags
|= DYNAMIC
;
5867 symesz
= bfd_coff_symesz (abfd
);
5870 flinfo
.output_bfd
= abfd
;
5871 flinfo
.strtab
= NULL
;
5872 flinfo
.section_info
= NULL
;
5873 flinfo
.last_file_index
= -1;
5874 flinfo
.toc_symindx
= -1;
5875 flinfo
.internal_syms
= NULL
;
5876 flinfo
.sym_indices
= NULL
;
5877 flinfo
.outsyms
= NULL
;
5878 flinfo
.linenos
= NULL
;
5879 flinfo
.contents
= NULL
;
5880 flinfo
.external_relocs
= NULL
;
5882 if (xcoff_hash_table (info
)->loader_section
)
5884 flinfo
.ldsym
= (xcoff_hash_table (info
)->loader_section
->contents
5885 + bfd_xcoff_ldhdrsz (abfd
));
5886 flinfo
.ldrel
= (xcoff_hash_table (info
)->loader_section
->contents
5887 + bfd_xcoff_ldhdrsz (abfd
)
5888 + (xcoff_hash_table (info
)->ldhdr
.l_nsyms
5889 * bfd_xcoff_ldsymsz (abfd
)));
5893 flinfo
.ldsym
= NULL
;
5894 flinfo
.ldrel
= NULL
;
5897 xcoff_data (abfd
)->coff
.link_info
= info
;
5899 flinfo
.strtab
= _bfd_stringtab_init ();
5900 if (flinfo
.strtab
== NULL
)
5903 /* Count the relocation entries required for the output file.
5904 (We've already counted the line numbers.) Determine a few
5906 max_contents_size
= 0;
5907 max_lineno_count
= 0;
5908 max_reloc_count
= 0;
5909 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5912 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5914 if (p
->type
== bfd_indirect_link_order
)
5918 sec
= p
->u
.indirect
.section
;
5920 /* Mark all sections which are to be included in the
5921 link. This will normally be every section. We need
5922 to do this so that we can identify any sections which
5923 the linker has decided to not include. */
5924 sec
->linker_mark
= true;
5926 o
->reloc_count
+= sec
->reloc_count
;
5928 if ((sec
->flags
& SEC_IN_MEMORY
) == 0)
5930 if (sec
->rawsize
> max_contents_size
)
5931 max_contents_size
= sec
->rawsize
;
5932 if (sec
->size
> max_contents_size
)
5933 max_contents_size
= sec
->size
;
5935 if (coff_section_data (sec
->owner
, sec
) != NULL
5936 && xcoff_section_data (sec
->owner
, sec
) != NULL
5937 && (xcoff_section_data (sec
->owner
, sec
)->lineno_count
5938 > max_lineno_count
))
5940 xcoff_section_data (sec
->owner
, sec
)->lineno_count
;
5941 if (sec
->reloc_count
> max_reloc_count
)
5942 max_reloc_count
= sec
->reloc_count
;
5944 else if (p
->type
== bfd_section_reloc_link_order
5945 || p
->type
== bfd_symbol_reloc_link_order
)
5950 /* Compute the file positions for all the sections. */
5951 if (abfd
->output_has_begun
)
5953 if (xcoff_hash_table (info
)->file_align
!= 0)
5960 file_align
= xcoff_hash_table (info
)->file_align
;
5961 if (file_align
!= 0)
5967 /* Insert .pad sections before every section which has
5968 contents and is loaded, if it is preceded by some other
5969 section which has contents and is loaded. */
5970 saw_contents
= true;
5971 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5973 if (strcmp (o
->name
, ".pad") == 0)
5974 saw_contents
= false;
5975 else if ((o
->flags
& SEC_HAS_CONTENTS
) != 0
5976 && (o
->flags
& SEC_LOAD
) != 0)
5979 saw_contents
= true;
5984 /* Create a pad section and place it before the section
5985 that needs padding. This requires unlinking and
5986 relinking the bfd's section list. */
5988 n
= bfd_make_section_anyway_with_flags (abfd
, ".pad",
5990 n
->alignment_power
= 0;
5992 bfd_section_list_remove (abfd
, n
);
5993 bfd_section_list_insert_before (abfd
, o
, n
);
5994 saw_contents
= false;
5999 /* Reset the section indices after inserting the new
6002 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6005 o
->target_index
= indx
;
6007 BFD_ASSERT ((unsigned int) indx
== abfd
->section_count
);
6009 /* Work out appropriate sizes for the .pad sections to force
6010 each section to land on a page boundary. This bit of
6011 code knows what compute_section_file_positions is going
6013 sofar
= bfd_coff_filhsz (abfd
);
6014 sofar
+= bfd_coff_aoutsz (abfd
);
6015 sofar
+= abfd
->section_count
* bfd_coff_scnhsz (abfd
);
6016 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6017 if ((bfd_xcoff_is_reloc_count_overflow
6018 (abfd
, (bfd_vma
) o
->reloc_count
))
6019 || (bfd_xcoff_is_lineno_count_overflow
6020 (abfd
, (bfd_vma
) o
->lineno_count
)))
6021 /* 64 does not overflow, need to check if 32 does */
6022 sofar
+= bfd_coff_scnhsz (abfd
);
6024 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6026 if (strcmp (o
->name
, ".pad") == 0)
6030 BFD_ASSERT (o
->size
== 0);
6031 pageoff
= sofar
& (file_align
- 1);
6034 o
->size
= file_align
- pageoff
;
6035 sofar
+= file_align
- pageoff
;
6036 o
->flags
|= SEC_HAS_CONTENTS
;
6041 if ((o
->flags
& SEC_HAS_CONTENTS
) != 0)
6042 sofar
+= BFD_ALIGN (o
->size
,
6043 1 << o
->alignment_power
);
6048 if (! bfd_coff_compute_section_file_positions (abfd
))
6052 /* Allocate space for the pointers we need to keep for the relocs. */
6056 /* We use section_count + 1, rather than section_count, because
6057 the target_index fields are 1 based. */
6058 amt
= abfd
->section_count
+ 1;
6059 amt
*= sizeof (struct xcoff_link_section_info
);
6060 flinfo
.section_info
= bfd_malloc (amt
);
6061 if (flinfo
.section_info
== NULL
)
6063 for (i
= 0; i
<= abfd
->section_count
; i
++)
6065 flinfo
.section_info
[i
].relocs
= NULL
;
6066 flinfo
.section_info
[i
].rel_hashes
= NULL
;
6067 flinfo
.section_info
[i
].toc_rel_hashes
= NULL
;
6071 /* Set the file positions for the relocs. */
6072 rel_filepos
= obj_relocbase (abfd
);
6073 relsz
= bfd_coff_relsz (abfd
);
6074 max_output_reloc_count
= 0;
6075 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6077 if (o
->reloc_count
== 0)
6081 /* A stripped file has no relocs. However, we still
6082 allocate the buffers, so that later code doesn't have to
6083 worry about whether we are stripping or not. */
6084 if (info
->strip
== strip_all
)
6088 o
->flags
|= SEC_RELOC
;
6089 o
->rel_filepos
= rel_filepos
;
6090 rel_filepos
+= o
->reloc_count
* relsz
;
6093 /* We don't know the indices of global symbols until we have
6094 written out all the local symbols. For each section in
6095 the output file, we keep an array of pointers to hash
6096 table entries. Each entry in the array corresponds to a
6097 reloc. When we find a reloc against a global symbol, we
6098 set the corresponding entry in this array so that we can
6099 fix up the symbol index after we have written out all the
6102 Because of this problem, we also keep the relocs in
6103 memory until the end of the link. This wastes memory.
6104 We could backpatch the file later, I suppose, although it
6106 amt
= o
->reloc_count
;
6107 amt
*= sizeof (struct internal_reloc
);
6108 flinfo
.section_info
[o
->target_index
].relocs
= bfd_malloc (amt
);
6110 amt
= o
->reloc_count
;
6111 amt
*= sizeof (struct xcoff_link_hash_entry
*);
6112 flinfo
.section_info
[o
->target_index
].rel_hashes
= bfd_malloc (amt
);
6114 if (flinfo
.section_info
[o
->target_index
].relocs
== NULL
6115 || flinfo
.section_info
[o
->target_index
].rel_hashes
== NULL
)
6118 if (o
->reloc_count
> max_output_reloc_count
)
6119 max_output_reloc_count
= o
->reloc_count
;
6123 /* We now know the size of the relocs, so we can determine the file
6124 positions of the line numbers. */
6125 line_filepos
= rel_filepos
;
6126 flinfo
.line_filepos
= line_filepos
;
6127 linesz
= bfd_coff_linesz (abfd
);
6128 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6130 if (o
->lineno_count
== 0)
6131 o
->line_filepos
= 0;
6134 o
->line_filepos
= line_filepos
;
6135 line_filepos
+= o
->lineno_count
* linesz
;
6138 /* Reset the reloc and lineno counts, so that we can use them to
6139 count the number of entries we have output so far. */
6141 o
->lineno_count
= 0;
6144 obj_sym_filepos (abfd
) = line_filepos
;
6146 /* Figure out the largest number of symbols in an input BFD. Take
6147 the opportunity to clear the output_has_begun fields of all the
6148 input BFD's. We want at least 6 symbols, since that is the
6149 number which xcoff_write_global_symbol may need. */
6151 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
6155 sub
->output_has_begun
= false;
6156 sz
= obj_raw_syment_count (sub
);
6157 if (sz
> max_sym_count
)
6161 /* Allocate some buffers used while linking. */
6162 amt
= max_sym_count
* sizeof (struct internal_syment
);
6163 flinfo
.internal_syms
= bfd_malloc (amt
);
6165 amt
= max_sym_count
* sizeof (long);
6166 flinfo
.sym_indices
= bfd_malloc (amt
);
6168 amt
= (max_sym_count
+ 1) * symesz
;
6169 flinfo
.outsyms
= bfd_malloc (amt
);
6171 amt
= max_lineno_count
* bfd_coff_linesz (abfd
);
6172 flinfo
.linenos
= bfd_malloc (amt
);
6174 amt
= max_contents_size
;
6175 flinfo
.contents
= bfd_malloc (amt
);
6177 amt
= max_reloc_count
* relsz
;
6178 flinfo
.external_relocs
= bfd_malloc (amt
);
6180 if ((flinfo
.internal_syms
== NULL
&& max_sym_count
> 0)
6181 || (flinfo
.sym_indices
== NULL
&& max_sym_count
> 0)
6182 || flinfo
.outsyms
== NULL
6183 || (flinfo
.linenos
== NULL
&& max_lineno_count
> 0)
6184 || (flinfo
.contents
== NULL
&& max_contents_size
> 0)
6185 || (flinfo
.external_relocs
== NULL
&& max_reloc_count
> 0))
6188 obj_raw_syment_count (abfd
) = 0;
6190 /* Find a TOC symbol, if we need one. */
6191 if (!xcoff_find_tc0 (abfd
, &flinfo
))
6194 /* We now know the position of everything in the file, except that
6195 we don't know the size of the symbol table and therefore we don't
6196 know where the string table starts. We just build the string
6197 table in memory as we go along. We process all the relocations
6198 for a single input file at once. */
6199 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6201 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
6203 if (p
->type
== bfd_indirect_link_order
6204 && p
->u
.indirect
.section
->owner
->xvec
== abfd
->xvec
)
6206 sub
= p
->u
.indirect
.section
->owner
;
6207 if (! sub
->output_has_begun
)
6209 if (! xcoff_link_input_bfd (&flinfo
, sub
))
6211 sub
->output_has_begun
= true;
6214 else if (p
->type
== bfd_section_reloc_link_order
6215 || p
->type
== bfd_symbol_reloc_link_order
)
6217 if (! xcoff_reloc_link_order (abfd
, &flinfo
, o
, p
))
6222 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
6228 /* Free up the buffers used by xcoff_link_input_bfd. */
6229 free (flinfo
.internal_syms
);
6230 flinfo
.internal_syms
= NULL
;
6231 free (flinfo
.sym_indices
);
6232 flinfo
.sym_indices
= NULL
;
6233 free (flinfo
.linenos
);
6234 flinfo
.linenos
= NULL
;
6235 free (flinfo
.contents
);
6236 flinfo
.contents
= NULL
;
6237 free (flinfo
.external_relocs
);
6238 flinfo
.external_relocs
= NULL
;
6240 /* The value of the last C_FILE symbol is supposed to be -1. Write
6242 if (flinfo
.last_file_index
!= -1)
6244 flinfo
.last_file
.n_value
= -(bfd_vma
) 1;
6245 bfd_coff_swap_sym_out (abfd
, (void *) &flinfo
.last_file
,
6246 (void *) flinfo
.outsyms
);
6247 pos
= obj_sym_filepos (abfd
) + flinfo
.last_file_index
* symesz
;
6248 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6249 || bfd_bwrite (flinfo
.outsyms
, symesz
, abfd
) != symesz
)
6253 /* Write out all the global symbols which do not come from XCOFF
6255 bfd_hash_traverse (&info
->hash
->table
, xcoff_write_global_symbol
, &flinfo
);
6257 free (flinfo
.outsyms
);
6258 flinfo
.outsyms
= NULL
;
6260 /* Now that we have written out all the global symbols, we know the
6261 symbol indices to use for relocs against them, and we can finally
6262 write out the relocs. */
6263 amt
= max_output_reloc_count
* relsz
;
6264 external_relocs
= bfd_malloc (amt
);
6265 if (external_relocs
== NULL
&& max_output_reloc_count
!= 0)
6268 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6270 struct internal_reloc
*irel
;
6271 struct internal_reloc
*irelend
;
6272 struct xcoff_link_hash_entry
**rel_hash
;
6273 struct xcoff_toc_rel_hash
*toc_rel_hash
;
6275 bfd_size_type rel_size
;
6277 /* A stripped file has no relocs. */
6278 if (info
->strip
== strip_all
)
6284 if (o
->reloc_count
== 0)
6287 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6288 irelend
= irel
+ o
->reloc_count
;
6289 rel_hash
= flinfo
.section_info
[o
->target_index
].rel_hashes
;
6290 for (; irel
< irelend
; irel
++, rel_hash
++)
6292 if (*rel_hash
!= NULL
)
6294 if ((*rel_hash
)->indx
< 0)
6296 (*info
->callbacks
->unattached_reloc
)
6297 (info
, (*rel_hash
)->root
.root
.string
,
6298 NULL
, o
, irel
->r_vaddr
);
6299 (*rel_hash
)->indx
= 0;
6301 irel
->r_symndx
= (*rel_hash
)->indx
;
6305 for (toc_rel_hash
= flinfo
.section_info
[o
->target_index
].toc_rel_hashes
;
6306 toc_rel_hash
!= NULL
;
6307 toc_rel_hash
= toc_rel_hash
->next
)
6309 if (toc_rel_hash
->h
->u
.toc_indx
< 0)
6311 (*info
->callbacks
->unattached_reloc
)
6312 (info
, toc_rel_hash
->h
->root
.root
.string
,
6313 NULL
, o
, toc_rel_hash
->rel
->r_vaddr
);
6314 toc_rel_hash
->h
->u
.toc_indx
= 0;
6316 toc_rel_hash
->rel
->r_symndx
= toc_rel_hash
->h
->u
.toc_indx
;
6319 /* XCOFF requires that the relocs be sorted by address. We tend
6320 to produce them in the order in which their containing csects
6321 appear in the symbol table, which is not necessarily by
6322 address. So we sort them here. There may be a better way to
6324 qsort ((void *) flinfo
.section_info
[o
->target_index
].relocs
,
6325 o
->reloc_count
, sizeof (struct internal_reloc
),
6328 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6329 irelend
= irel
+ o
->reloc_count
;
6330 erel
= external_relocs
;
6331 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
6332 bfd_coff_swap_reloc_out (abfd
, (void *) irel
, (void *) erel
);
6334 rel_size
= relsz
* o
->reloc_count
;
6335 if (bfd_seek (abfd
, o
->rel_filepos
, SEEK_SET
) != 0
6336 || bfd_bwrite ((void *) external_relocs
, rel_size
, abfd
) != rel_size
)
6340 free (external_relocs
);
6341 external_relocs
= NULL
;
6343 /* Free up the section information. */
6344 if (flinfo
.section_info
!= NULL
)
6348 for (i
= 0; i
< abfd
->section_count
; i
++)
6350 free (flinfo
.section_info
[i
].relocs
);
6351 free (flinfo
.section_info
[i
].rel_hashes
);
6353 free (flinfo
.section_info
);
6354 flinfo
.section_info
= NULL
;
6357 /* Write out the loader section contents. */
6358 o
= xcoff_hash_table (info
)->loader_section
;
6361 && o
->output_section
!= bfd_abs_section_ptr
)
6363 BFD_ASSERT ((bfd_byte
*) flinfo
.ldrel
6364 == (xcoff_hash_table (info
)->loader_section
->contents
6365 + xcoff_hash_table (info
)->ldhdr
.l_impoff
));
6366 if (!bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6367 (file_ptr
) o
->output_offset
, o
->size
))
6371 /* Write out the magic sections. */
6372 o
= xcoff_hash_table (info
)->linkage_section
;
6375 && o
->output_section
!= bfd_abs_section_ptr
6376 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6377 (file_ptr
) o
->output_offset
,
6380 o
= xcoff_hash_table (info
)->toc_section
;
6383 && o
->output_section
!= bfd_abs_section_ptr
6384 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6385 (file_ptr
) o
->output_offset
,
6388 o
= xcoff_hash_table (info
)->descriptor_section
;
6391 && o
->output_section
!= bfd_abs_section_ptr
6392 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6393 (file_ptr
) o
->output_offset
,
6397 /* Write out the string table. */
6398 pos
= obj_sym_filepos (abfd
) + obj_raw_syment_count (abfd
) * symesz
;
6399 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6402 _bfd_stringtab_size (flinfo
.strtab
) + STRING_SIZE_SIZE
,
6404 amt
= STRING_SIZE_SIZE
;
6405 if (bfd_bwrite (strbuf
, amt
, abfd
) != amt
)
6407 if (! _bfd_stringtab_emit (abfd
, flinfo
.strtab
))
6410 _bfd_stringtab_free (flinfo
.strtab
);
6412 /* Write out the debugging string table. */
6413 o
= xcoff_hash_table (info
)->debug_section
;
6416 && o
->output_section
!= bfd_abs_section_ptr
)
6418 struct bfd_strtab_hash
*debug_strtab
;
6420 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
6421 BFD_ASSERT (o
->output_section
->size
- o
->output_offset
6422 >= _bfd_stringtab_size (debug_strtab
));
6423 pos
= o
->output_section
->filepos
+ o
->output_offset
;
6424 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6426 if (! _bfd_stringtab_emit (abfd
, debug_strtab
))
6430 /* Setting symcount to 0 will cause write_object_contents to
6431 not try to write out the symbols. */
6437 if (flinfo
.strtab
!= NULL
)
6438 _bfd_stringtab_free (flinfo
.strtab
);
6440 if (flinfo
.section_info
!= NULL
)
6444 for (i
= 0; i
< abfd
->section_count
; i
++)
6446 free (flinfo
.section_info
[i
].relocs
);
6447 free (flinfo
.section_info
[i
].rel_hashes
);
6449 free (flinfo
.section_info
);
6452 free (flinfo
.internal_syms
);
6453 free (flinfo
.sym_indices
);
6454 free (flinfo
.outsyms
);
6455 free (flinfo
.linenos
);
6456 free (flinfo
.contents
);
6457 free (flinfo
.external_relocs
);
6458 free (external_relocs
);