1 /* POWER/PowerPC XCOFF linker support.
2 Copyright (C) 1995-2020 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "coff/internal.h"
27 #include "coff/xcoff.h"
30 #include "libiberty.h"
31 #include "xcofflink.h"
33 /* This file holds the XCOFF linker code. */
35 #undef STRING_SIZE_SIZE
36 #define STRING_SIZE_SIZE 4
38 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
39 This flag will only be used on input sections. */
41 #define SEC_MARK (SEC_ROM)
43 /* The list of import files. */
45 struct xcoff_import_file
47 /* The next entry in the list. */
48 struct xcoff_import_file
*next
;
53 /* The member name. */
57 /* Information we keep for each section in the output file during the
60 struct xcoff_link_section_info
62 /* The relocs to be output. */
63 struct internal_reloc
*relocs
;
64 /* For each reloc against a global symbol whose index was not known
65 when the reloc was handled, the global hash table entry. */
66 struct xcoff_link_hash_entry
**rel_hashes
;
67 /* If there is a TOC relative reloc against a global symbol, and the
68 index of the TOC symbol is not known when the reloc was handled,
69 an entry is added to this linked list. This is not an array,
70 like rel_hashes, because this case is quite uncommon. */
71 struct xcoff_toc_rel_hash
73 struct xcoff_toc_rel_hash
*next
;
74 struct xcoff_link_hash_entry
*h
;
75 struct internal_reloc
*rel
;
79 /* Information that the XCOFF linker collects about an archive. */
80 struct xcoff_archive_info
82 /* The archive described by this entry. */
85 /* The import path and import filename to use when referring to
86 this archive in the .loader section. */
90 /* True if the archive contains a dynamic object. */
91 unsigned int contains_shared_object_p
: 1;
93 /* True if the previous field is valid. */
94 unsigned int know_contains_shared_object_p
: 1;
97 struct xcoff_link_hash_table
99 struct bfd_link_hash_table root
;
101 /* The .debug string hash table. We need to compute this while
102 reading the input files, so that we know how large the .debug
103 section will be before we assign section positions. */
104 struct bfd_strtab_hash
*debug_strtab
;
106 /* The .debug section we will use for the final output. */
107 asection
*debug_section
;
109 /* The .loader section we will use for the final output. */
110 asection
*loader_section
;
112 /* A count of non TOC relative relocs which will need to be
113 allocated in the .loader section. */
116 /* The .loader section header. */
117 struct internal_ldhdr ldhdr
;
119 /* The .gl section we use to hold global linkage code. */
120 asection
*linkage_section
;
122 /* The .tc section we use to hold toc entries we build for global
124 asection
*toc_section
;
126 /* The .ds section we use to hold function descriptors which we
127 create for exported symbols. */
128 asection
*descriptor_section
;
130 /* The list of import files. */
131 struct xcoff_import_file
*imports
;
133 /* Required alignment of sections within the output file. */
134 unsigned long file_align
;
136 /* Whether the .text section must be read-only. */
139 /* Whether -brtl was specified. */
142 /* Whether garbage collection was done. */
145 /* A linked list of symbols for which we have size information. */
146 struct xcoff_link_size_list
148 struct xcoff_link_size_list
*next
;
149 struct xcoff_link_hash_entry
*h
;
154 /* Information about archives. */
157 /* Magic sections: _text, _etext, _data, _edata, _end, end. */
158 asection
*special_sections
[XCOFF_NUMBER_OF_SPECIAL_SECTIONS
];
161 /* Information that we pass around while doing the final link step. */
163 struct xcoff_final_link_info
165 /* General link information. */
166 struct bfd_link_info
*info
;
169 /* Hash table for long symbol names. */
170 struct bfd_strtab_hash
*strtab
;
171 /* Array of information kept for each output section, indexed by the
172 target_index field. */
173 struct xcoff_link_section_info
*section_info
;
174 /* Symbol index of last C_FILE symbol (-1 if none). */
175 long last_file_index
;
176 /* Contents of last C_FILE symbol. */
177 struct internal_syment last_file
;
178 /* Symbol index of TOC symbol. */
180 /* Start of .loader symbols. */
182 /* Next .loader reloc to swap out. */
184 /* File position of start of line numbers. */
185 file_ptr line_filepos
;
186 /* Buffer large enough to hold swapped symbols of any input file. */
187 struct internal_syment
*internal_syms
;
188 /* Buffer large enough to hold output indices of symbols of any
191 /* Buffer large enough to hold output symbols for any input file. */
193 /* Buffer large enough to hold external line numbers for any input
196 /* Buffer large enough to hold any input section. */
198 /* Buffer large enough to hold external relocs of any input section. */
199 bfd_byte
*external_relocs
;
202 static bfd_boolean
xcoff_mark (struct bfd_link_info
*, asection
*);
206 /* Routines to read XCOFF dynamic information. This don't really
207 belong here, but we already have the ldsym manipulation routines
210 /* Read the contents of a section. */
213 xcoff_get_section_contents (bfd
*abfd
, asection
*sec
)
215 if (coff_section_data (abfd
, sec
) == NULL
)
217 size_t amt
= sizeof (struct coff_section_tdata
);
219 sec
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
220 if (sec
->used_by_bfd
== NULL
)
224 if (coff_section_data (abfd
, sec
)->contents
== NULL
)
228 if (! bfd_malloc_and_get_section (abfd
, sec
, &contents
))
230 if (contents
!= NULL
)
234 coff_section_data (abfd
, sec
)->contents
= contents
;
240 /* Get the size required to hold the dynamic symbols. */
243 _bfd_xcoff_get_dynamic_symtab_upper_bound (bfd
*abfd
)
247 struct internal_ldhdr ldhdr
;
249 if ((abfd
->flags
& DYNAMIC
) == 0)
251 bfd_set_error (bfd_error_invalid_operation
);
255 lsec
= bfd_get_section_by_name (abfd
, ".loader");
258 bfd_set_error (bfd_error_no_symbols
);
262 if (! xcoff_get_section_contents (abfd
, lsec
))
264 contents
= coff_section_data (abfd
, lsec
)->contents
;
266 bfd_xcoff_swap_ldhdr_in (abfd
, (void *) contents
, &ldhdr
);
268 return (ldhdr
.l_nsyms
+ 1) * sizeof (asymbol
*);
271 /* Get the dynamic symbols. */
274 _bfd_xcoff_canonicalize_dynamic_symtab (bfd
*abfd
, asymbol
**psyms
)
278 struct internal_ldhdr ldhdr
;
280 bfd_byte
*elsym
, *elsymend
;
281 coff_symbol_type
*symbuf
;
283 if ((abfd
->flags
& DYNAMIC
) == 0)
285 bfd_set_error (bfd_error_invalid_operation
);
289 lsec
= bfd_get_section_by_name (abfd
, ".loader");
292 bfd_set_error (bfd_error_no_symbols
);
296 if (! xcoff_get_section_contents (abfd
, lsec
))
298 contents
= coff_section_data (abfd
, lsec
)->contents
;
300 coff_section_data (abfd
, lsec
)->keep_contents
= TRUE
;
302 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
304 strings
= (char *) contents
+ ldhdr
.l_stoff
;
306 symbuf
= bfd_zalloc (abfd
, ldhdr
.l_nsyms
* sizeof (* symbuf
));
310 elsym
= contents
+ bfd_xcoff_loader_symbol_offset(abfd
, &ldhdr
);
312 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz(abfd
);
313 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz(abfd
), symbuf
++, psyms
++)
315 struct internal_ldsym ldsym
;
317 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
319 symbuf
->symbol
.the_bfd
= abfd
;
321 if (ldsym
._l
._l_l
._l_zeroes
== 0)
322 symbuf
->symbol
.name
= strings
+ ldsym
._l
._l_l
._l_offset
;
327 c
= bfd_alloc (abfd
, (bfd_size_type
) SYMNMLEN
+ 1);
330 memcpy (c
, ldsym
._l
._l_name
, SYMNMLEN
);
332 symbuf
->symbol
.name
= c
;
335 if (ldsym
.l_smclas
== XMC_XO
)
336 symbuf
->symbol
.section
= bfd_abs_section_ptr
;
338 symbuf
->symbol
.section
= coff_section_from_bfd_index (abfd
,
340 symbuf
->symbol
.value
= ldsym
.l_value
- symbuf
->symbol
.section
->vma
;
342 symbuf
->symbol
.flags
= BSF_NO_FLAGS
;
343 if ((ldsym
.l_smtype
& L_EXPORT
) != 0)
345 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
346 symbuf
->symbol
.flags
|= BSF_WEAK
;
348 symbuf
->symbol
.flags
|= BSF_GLOBAL
;
351 /* FIXME: We have no way to record the other information stored
352 with the loader symbol. */
353 *psyms
= (asymbol
*) symbuf
;
358 return ldhdr
.l_nsyms
;
361 /* Get the size required to hold the dynamic relocs. */
364 _bfd_xcoff_get_dynamic_reloc_upper_bound (bfd
*abfd
)
368 struct internal_ldhdr ldhdr
;
370 if ((abfd
->flags
& DYNAMIC
) == 0)
372 bfd_set_error (bfd_error_invalid_operation
);
376 lsec
= bfd_get_section_by_name (abfd
, ".loader");
379 bfd_set_error (bfd_error_no_symbols
);
383 if (! xcoff_get_section_contents (abfd
, lsec
))
385 contents
= coff_section_data (abfd
, lsec
)->contents
;
387 bfd_xcoff_swap_ldhdr_in (abfd
, (struct external_ldhdr
*) contents
, &ldhdr
);
389 return (ldhdr
.l_nreloc
+ 1) * sizeof (arelent
*);
392 /* Get the dynamic relocs. */
395 _bfd_xcoff_canonicalize_dynamic_reloc (bfd
*abfd
,
401 struct internal_ldhdr ldhdr
;
403 bfd_byte
*elrel
, *elrelend
;
405 if ((abfd
->flags
& DYNAMIC
) == 0)
407 bfd_set_error (bfd_error_invalid_operation
);
411 lsec
= bfd_get_section_by_name (abfd
, ".loader");
414 bfd_set_error (bfd_error_no_symbols
);
418 if (! xcoff_get_section_contents (abfd
, lsec
))
420 contents
= coff_section_data (abfd
, lsec
)->contents
;
422 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
424 relbuf
= bfd_alloc (abfd
, ldhdr
.l_nreloc
* sizeof (arelent
));
428 elrel
= contents
+ bfd_xcoff_loader_reloc_offset(abfd
, &ldhdr
);
430 elrelend
= elrel
+ ldhdr
.l_nreloc
* bfd_xcoff_ldrelsz(abfd
);
431 for (; elrel
< elrelend
; elrel
+= bfd_xcoff_ldrelsz(abfd
), relbuf
++,
434 struct internal_ldrel ldrel
;
436 bfd_xcoff_swap_ldrel_in (abfd
, elrel
, &ldrel
);
438 if (ldrel
.l_symndx
>= 3)
439 relbuf
->sym_ptr_ptr
= syms
+ (ldrel
.l_symndx
- 3);
445 switch (ldrel
.l_symndx
)
461 sec
= bfd_get_section_by_name (abfd
, name
);
464 bfd_set_error (bfd_error_bad_value
);
468 relbuf
->sym_ptr_ptr
= sec
->symbol_ptr_ptr
;
471 relbuf
->address
= ldrel
.l_vaddr
;
474 /* Most dynamic relocs have the same type. FIXME: This is only
475 correct if ldrel.l_rtype == 0. In other cases, we should use
476 a different howto. */
477 relbuf
->howto
= bfd_xcoff_dynamic_reloc_howto(abfd
);
479 /* FIXME: We have no way to record the l_rsecnm field. */
486 return ldhdr
.l_nreloc
;
489 /* Hash functions for xcoff_link_hash_table's archive_info. */
492 xcoff_archive_info_hash (const void *data
)
494 const struct xcoff_archive_info
*info
;
496 info
= (const struct xcoff_archive_info
*) data
;
497 return htab_hash_pointer (info
->archive
);
501 xcoff_archive_info_eq (const void *data1
, const void *data2
)
503 const struct xcoff_archive_info
*info1
;
504 const struct xcoff_archive_info
*info2
;
506 info1
= (const struct xcoff_archive_info
*) data1
;
507 info2
= (const struct xcoff_archive_info
*) data2
;
508 return info1
->archive
== info2
->archive
;
511 /* Return information about archive ARCHIVE. Return NULL on error. */
513 static struct xcoff_archive_info
*
514 xcoff_get_archive_info (struct bfd_link_info
*info
, bfd
*archive
)
516 struct xcoff_link_hash_table
*htab
;
517 struct xcoff_archive_info
*entryp
, entry
;
520 htab
= xcoff_hash_table (info
);
521 entry
.archive
= archive
;
522 slot
= htab_find_slot (htab
->archive_info
, &entry
, INSERT
);
529 entryp
= bfd_zalloc (archive
, sizeof (entry
));
533 entryp
->archive
= archive
;
539 /* Routine to create an entry in an XCOFF link hash table. */
541 static struct bfd_hash_entry
*
542 xcoff_link_hash_newfunc (struct bfd_hash_entry
*entry
,
543 struct bfd_hash_table
*table
,
546 struct xcoff_link_hash_entry
*ret
= (struct xcoff_link_hash_entry
*) entry
;
548 /* Allocate the structure if it has not already been allocated by a
551 ret
= bfd_hash_allocate (table
, sizeof (* ret
));
555 /* Call the allocation method of the superclass. */
556 ret
= ((struct xcoff_link_hash_entry
*)
557 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
561 /* Set local fields. */
563 ret
->toc_section
= NULL
;
564 ret
->u
.toc_indx
= -1;
565 ret
->descriptor
= NULL
;
569 ret
->smclas
= XMC_UA
;
572 return (struct bfd_hash_entry
*) ret
;
575 /* Destroy an XCOFF link hash table. */
578 _bfd_xcoff_bfd_link_hash_table_free (bfd
*obfd
)
580 struct xcoff_link_hash_table
*ret
;
582 ret
= (struct xcoff_link_hash_table
*) obfd
->link
.hash
;
583 if (ret
->archive_info
)
584 htab_delete (ret
->archive_info
);
585 if (ret
->debug_strtab
)
586 _bfd_stringtab_free (ret
->debug_strtab
);
587 _bfd_generic_link_hash_table_free (obfd
);
590 /* Create an XCOFF link hash table. */
592 struct bfd_link_hash_table
*
593 _bfd_xcoff_bfd_link_hash_table_create (bfd
*abfd
)
595 struct xcoff_link_hash_table
*ret
;
596 size_t amt
= sizeof (* ret
);
598 ret
= bfd_zmalloc (amt
);
601 if (!_bfd_link_hash_table_init (&ret
->root
, abfd
, xcoff_link_hash_newfunc
,
602 sizeof (struct xcoff_link_hash_entry
)))
608 ret
->debug_strtab
= _bfd_xcoff_stringtab_init ();
609 ret
->archive_info
= htab_create (37, xcoff_archive_info_hash
,
610 xcoff_archive_info_eq
, NULL
);
611 if (!ret
->debug_strtab
|| !ret
->archive_info
)
613 _bfd_xcoff_bfd_link_hash_table_free (abfd
);
616 ret
->root
.hash_table_free
= _bfd_xcoff_bfd_link_hash_table_free
;
618 /* The linker will always generate a full a.out header. We need to
619 record that fact now, before the sizeof_headers routine could be
621 xcoff_data (abfd
)->full_aouthdr
= TRUE
;
626 /* Read internal relocs for an XCOFF csect. This is a wrapper around
627 _bfd_coff_read_internal_relocs which tries to take advantage of any
628 relocs which may have been cached for the enclosing section. */
630 static struct internal_reloc
*
631 xcoff_read_internal_relocs (bfd
*abfd
,
634 bfd_byte
*external_relocs
,
635 bfd_boolean require_internal
,
636 struct internal_reloc
*internal_relocs
)
638 if (coff_section_data (abfd
, sec
) != NULL
639 && coff_section_data (abfd
, sec
)->relocs
== NULL
640 && xcoff_section_data (abfd
, sec
) != NULL
)
644 enclosing
= xcoff_section_data (abfd
, sec
)->enclosing
;
646 if (enclosing
!= NULL
647 && (coff_section_data (abfd
, enclosing
) == NULL
648 || coff_section_data (abfd
, enclosing
)->relocs
== NULL
)
650 && enclosing
->reloc_count
> 0)
652 if (_bfd_coff_read_internal_relocs (abfd
, enclosing
, TRUE
,
653 external_relocs
, FALSE
, NULL
)
658 if (enclosing
!= NULL
659 && coff_section_data (abfd
, enclosing
) != NULL
660 && coff_section_data (abfd
, enclosing
)->relocs
!= NULL
)
664 off
= ((sec
->rel_filepos
- enclosing
->rel_filepos
)
665 / bfd_coff_relsz (abfd
));
667 if (! require_internal
)
668 return coff_section_data (abfd
, enclosing
)->relocs
+ off
;
669 memcpy (internal_relocs
,
670 coff_section_data (abfd
, enclosing
)->relocs
+ off
,
671 sec
->reloc_count
* sizeof (struct internal_reloc
));
672 return internal_relocs
;
676 return _bfd_coff_read_internal_relocs (abfd
, sec
, cache
, external_relocs
,
677 require_internal
, internal_relocs
);
680 /* Split FILENAME into an import path and an import filename,
681 storing them in *IMPPATH and *IMPFILE respectively. */
684 bfd_xcoff_split_import_path (bfd
*abfd
, const char *filename
,
685 const char **imppath
, const char **impfile
)
691 base
= lbasename (filename
);
692 length
= base
- filename
;
694 /* The filename has no directory component, so use an empty path. */
696 else if (length
== 1)
697 /* The filename is in the root directory. */
701 /* Extract the (non-empty) directory part. Note that we don't
702 need to strip duplicate directory separators from any part
703 of the string; the native linker doesn't do that either. */
704 path
= bfd_alloc (abfd
, length
);
707 memcpy (path
, filename
, length
- 1);
708 path
[length
- 1] = 0;
715 /* Set ARCHIVE's import path as though its filename had been given
719 bfd_xcoff_set_archive_import_path (struct bfd_link_info
*info
,
720 bfd
*archive
, const char *filename
)
722 struct xcoff_archive_info
*archive_info
;
724 archive_info
= xcoff_get_archive_info (info
, archive
);
725 return (archive_info
!= NULL
726 && bfd_xcoff_split_import_path (archive
, filename
,
727 &archive_info
->imppath
,
728 &archive_info
->impfile
));
731 /* H is an imported symbol. Set the import module's path, file and member
732 to IMPATH, IMPFILE and IMPMEMBER respectively. All three are null if
733 no specific import module is specified. */
736 xcoff_set_import_path (struct bfd_link_info
*info
,
737 struct xcoff_link_hash_entry
*h
,
738 const char *imppath
, const char *impfile
,
739 const char *impmember
)
742 struct xcoff_import_file
**pp
;
744 /* We overload the ldindx field to hold the l_ifile value for this
746 BFD_ASSERT (h
->ldsym
== NULL
);
747 BFD_ASSERT ((h
->flags
& XCOFF_BUILT_LDSYM
) == 0);
752 /* We start c at 1 because the first entry in the import list is
753 reserved for the library search path. */
754 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
756 pp
= &(*pp
)->next
, ++c
)
758 if (filename_cmp ((*pp
)->path
, imppath
) == 0
759 && filename_cmp ((*pp
)->file
, impfile
) == 0
760 && filename_cmp ((*pp
)->member
, impmember
) == 0)
766 struct xcoff_import_file
*n
;
767 size_t amt
= sizeof (*n
);
769 n
= bfd_alloc (info
->output_bfd
, amt
);
775 n
->member
= impmember
;
783 /* H is the bfd symbol associated with exported .loader symbol LDSYM.
784 Return true if LDSYM defines H. */
787 xcoff_dynamic_definition_p (struct xcoff_link_hash_entry
*h
,
788 struct internal_ldsym
*ldsym
)
790 /* If we didn't know about H before processing LDSYM, LDSYM
791 definitely defines H. */
792 if (h
->root
.type
== bfd_link_hash_new
)
795 /* If H is currently a weak dynamic symbol, and if LDSYM is a strong
796 dynamic symbol, LDSYM trumps the current definition of H. */
797 if ((ldsym
->l_smtype
& L_WEAK
) == 0
798 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0
799 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
800 && (h
->root
.type
== bfd_link_hash_defweak
801 || h
->root
.type
== bfd_link_hash_undefweak
))
804 /* If H is currently undefined, LDSYM defines it. */
805 if ((h
->flags
& XCOFF_DEF_DYNAMIC
) == 0
806 && (h
->root
.type
== bfd_link_hash_undefined
807 || h
->root
.type
== bfd_link_hash_undefweak
))
813 /* This function is used to add symbols from a dynamic object to the
814 global symbol table. */
817 xcoff_link_add_dynamic_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
821 struct internal_ldhdr ldhdr
;
823 bfd_byte
*elsym
, *elsymend
;
824 struct xcoff_import_file
*n
;
826 struct xcoff_import_file
**pp
;
828 /* We can only handle a dynamic object if we are generating an XCOFF
830 if (info
->output_bfd
->xvec
!= abfd
->xvec
)
833 (_("%pB: XCOFF shared object when not producing XCOFF output"),
835 bfd_set_error (bfd_error_invalid_operation
);
839 /* The symbols we use from a dynamic object are not the symbols in
840 the normal symbol table, but, rather, the symbols in the export
841 table. If there is a global symbol in a dynamic object which is
842 not in the export table, the loader will not be able to find it,
843 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
844 libc.a has symbols in the export table which are not in the
847 /* Read in the .loader section. FIXME: We should really use the
848 o_snloader field in the a.out header, rather than grabbing the
850 lsec
= bfd_get_section_by_name (abfd
, ".loader");
854 (_("%pB: dynamic object with no .loader section"),
856 bfd_set_error (bfd_error_no_symbols
);
860 if (! xcoff_get_section_contents (abfd
, lsec
))
862 contents
= coff_section_data (abfd
, lsec
)->contents
;
864 /* Remove the sections from this object, so that they do not get
865 included in the link. */
866 bfd_section_list_clear (abfd
);
868 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
870 strings
= (char *) contents
+ ldhdr
.l_stoff
;
872 elsym
= contents
+ bfd_xcoff_loader_symbol_offset(abfd
, &ldhdr
);
874 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz(abfd
);
876 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz(abfd
))
878 struct internal_ldsym ldsym
;
879 char nambuf
[SYMNMLEN
+ 1];
881 struct xcoff_link_hash_entry
*h
;
883 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
885 /* We are only interested in exported symbols. */
886 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
889 if (ldsym
._l
._l_l
._l_zeroes
== 0)
890 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
893 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
894 nambuf
[SYMNMLEN
] = '\0';
898 /* Normally we could not call xcoff_link_hash_lookup in an add
899 symbols routine, since we might not be using an XCOFF hash
900 table. However, we verified above that we are using an XCOFF
903 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, TRUE
,
908 if (!xcoff_dynamic_definition_p (h
, &ldsym
))
911 h
->flags
|= XCOFF_DEF_DYNAMIC
;
912 h
->smclas
= ldsym
.l_smclas
;
913 if (h
->smclas
== XMC_XO
)
915 /* This symbol has an absolute value. */
916 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
917 h
->root
.type
= bfd_link_hash_defweak
;
919 h
->root
.type
= bfd_link_hash_defined
;
920 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
921 h
->root
.u
.def
.value
= ldsym
.l_value
;
925 /* Otherwise, we don't bother to actually define the symbol,
926 since we don't have a section to put it in anyhow.
927 We assume instead that an undefined XCOFF_DEF_DYNAMIC symbol
928 should be imported from the symbol's undef.abfd. */
929 if ((ldsym
.l_smtype
& L_WEAK
) != 0)
930 h
->root
.type
= bfd_link_hash_undefweak
;
932 h
->root
.type
= bfd_link_hash_undefined
;
933 h
->root
.u
.undef
.abfd
= abfd
;
936 /* If this symbol defines a function descriptor, then it
937 implicitly defines the function code as well. */
938 if (h
->smclas
== XMC_DS
939 || (h
->smclas
== XMC_XO
&& name
[0] != '.'))
940 h
->flags
|= XCOFF_DESCRIPTOR
;
941 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
943 struct xcoff_link_hash_entry
*hds
;
950 dsnm
= bfd_malloc ((bfd_size_type
) strlen (name
) + 2);
954 strcpy (dsnm
+ 1, name
);
955 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
), dsnm
,
965 if (xcoff_dynamic_definition_p (hds
, &ldsym
))
967 hds
->root
.type
= h
->root
.type
;
968 hds
->flags
|= XCOFF_DEF_DYNAMIC
;
969 if (h
->smclas
== XMC_XO
)
971 /* An absolute symbol appears to actually define code, not a
972 function descriptor. This is how some math functions are
973 implemented on AIX 4.1. */
974 hds
->smclas
= XMC_XO
;
975 hds
->root
.u
.def
.section
= bfd_abs_section_ptr
;
976 hds
->root
.u
.def
.value
= ldsym
.l_value
;
980 hds
->smclas
= XMC_PR
;
981 hds
->root
.u
.undef
.abfd
= abfd
;
982 /* We do not want to add this to the undefined
989 if (contents
!= NULL
&& ! coff_section_data (abfd
, lsec
)->keep_contents
)
991 free (coff_section_data (abfd
, lsec
)->contents
);
992 coff_section_data (abfd
, lsec
)->contents
= NULL
;
995 /* Record this file in the import files. */
996 n
= bfd_alloc (abfd
, (bfd_size_type
) sizeof (struct xcoff_import_file
));
1001 if (abfd
->my_archive
== NULL
|| bfd_is_thin_archive (abfd
->my_archive
))
1003 if (!bfd_xcoff_split_import_path (abfd
, bfd_get_filename (abfd
),
1004 &n
->path
, &n
->file
))
1010 struct xcoff_archive_info
*archive_info
;
1012 archive_info
= xcoff_get_archive_info (info
, abfd
->my_archive
);
1013 if (!archive_info
->impfile
)
1015 if (!bfd_xcoff_split_import_path (archive_info
->archive
,
1016 bfd_get_filename (archive_info
1018 &archive_info
->imppath
,
1019 &archive_info
->impfile
))
1022 n
->path
= archive_info
->imppath
;
1023 n
->file
= archive_info
->impfile
;
1024 n
->member
= bfd_get_filename (abfd
);
1027 /* We start c at 1 because the first import file number is reserved
1029 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
1031 pp
= &(*pp
)->next
, ++c
)
1035 xcoff_data (abfd
)->import_file_id
= c
;
1040 /* xcoff_link_create_extra_sections
1042 Takes care of creating the .loader, .gl, .ds, .debug and sections. */
1045 xcoff_link_create_extra_sections (bfd
* abfd
, struct bfd_link_info
*info
)
1047 bfd_boolean return_value
= FALSE
;
1049 if (info
->output_bfd
->xvec
== abfd
->xvec
)
1051 /* We need to build a .loader section, so we do it here. This
1052 won't work if we're producing an XCOFF output file with no
1053 XCOFF input files. FIXME. */
1055 if (!bfd_link_relocatable (info
)
1056 && xcoff_hash_table (info
)->loader_section
== NULL
)
1059 flagword flags
= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1061 lsec
= bfd_make_section_anyway_with_flags (abfd
, ".loader", flags
);
1065 xcoff_hash_table (info
)->loader_section
= lsec
;
1068 /* Likewise for the linkage section. */
1069 if (xcoff_hash_table (info
)->linkage_section
== NULL
)
1072 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1075 lsec
= bfd_make_section_anyway_with_flags (abfd
, ".gl", flags
);
1079 xcoff_hash_table (info
)->linkage_section
= lsec
;
1080 lsec
->alignment_power
= 2;
1083 /* Likewise for the TOC section. */
1084 if (xcoff_hash_table (info
)->toc_section
== NULL
)
1087 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1090 tsec
= bfd_make_section_anyway_with_flags (abfd
, ".tc", flags
);
1094 xcoff_hash_table (info
)->toc_section
= tsec
;
1095 tsec
->alignment_power
= 2;
1098 /* Likewise for the descriptor section. */
1099 if (xcoff_hash_table (info
)->descriptor_section
== NULL
)
1102 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1105 dsec
= bfd_make_section_anyway_with_flags (abfd
, ".ds", flags
);
1109 xcoff_hash_table (info
)->descriptor_section
= dsec
;
1110 dsec
->alignment_power
= 2;
1113 /* Likewise for the .debug section. */
1114 if (xcoff_hash_table (info
)->debug_section
== NULL
1115 && info
->strip
!= strip_all
)
1118 flagword flags
= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1120 dsec
= bfd_make_section_anyway_with_flags (abfd
, ".debug", flags
);
1124 xcoff_hash_table (info
)->debug_section
= dsec
;
1128 return_value
= TRUE
;
1132 return return_value
;
1135 /* Returns the index of reloc in RELOCS with the least address greater
1136 than or equal to ADDRESS. The relocs are sorted by address. */
1138 static bfd_size_type
1139 xcoff_find_reloc (struct internal_reloc
*relocs
,
1140 bfd_size_type count
,
1143 bfd_size_type min
, max
, this;
1147 if (count
== 1 && relocs
[0].r_vaddr
< address
)
1156 /* Do a binary search over (min,max]. */
1157 while (min
+ 1 < max
)
1161 this = (max
+ min
) / 2;
1162 raddr
= relocs
[this].r_vaddr
;
1163 if (raddr
> address
)
1165 else if (raddr
< address
)
1174 if (relocs
[min
].r_vaddr
< address
)
1178 && relocs
[min
- 1].r_vaddr
== address
)
1184 /* Add all the symbols from an object file to the hash table.
1186 XCOFF is a weird format. A normal XCOFF .o files will have three
1187 COFF sections--.text, .data, and .bss--but each COFF section will
1188 contain many csects. These csects are described in the symbol
1189 table. From the linker's point of view, each csect must be
1190 considered a section in its own right. For example, a TOC entry is
1191 handled as a small XMC_TC csect. The linker must be able to merge
1192 different TOC entries together, which means that it must be able to
1193 extract the XMC_TC csects from the .data section of the input .o
1196 From the point of view of our linker, this is, of course, a hideous
1197 nightmare. We cope by actually creating sections for each csect,
1198 and discarding the original sections. We then have to handle the
1199 relocation entries carefully, since the only way to tell which
1200 csect they belong to is to examine the address. */
1203 xcoff_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
1205 unsigned int n_tmask
;
1206 unsigned int n_btshft
;
1207 bfd_boolean default_copy
;
1208 bfd_size_type symcount
;
1209 struct xcoff_link_hash_entry
**sym_hash
;
1210 asection
**csect_cache
;
1211 unsigned int *lineno_counts
;
1212 bfd_size_type linesz
;
1214 asection
*last_real
;
1215 bfd_boolean keep_syms
;
1217 unsigned int csect_index
;
1218 asection
*first_csect
;
1219 bfd_size_type symesz
;
1222 struct reloc_info_struct
1224 struct internal_reloc
*relocs
;
1227 } *reloc_info
= NULL
;
1230 keep_syms
= obj_coff_keep_syms (abfd
);
1232 if ((abfd
->flags
& DYNAMIC
) != 0
1233 && ! info
->static_link
)
1235 if (! xcoff_link_add_dynamic_symbols (abfd
, info
))
1239 /* Create the loader, toc, gl, ds and debug sections, if needed. */
1240 if (! xcoff_link_create_extra_sections (abfd
, info
))
1243 if ((abfd
->flags
& DYNAMIC
) != 0
1244 && ! info
->static_link
)
1247 n_tmask
= coff_data (abfd
)->local_n_tmask
;
1248 n_btshft
= coff_data (abfd
)->local_n_btshft
;
1250 /* Define macros so that ISFCN, et. al., macros work correctly. */
1251 #define N_TMASK n_tmask
1252 #define N_BTSHFT n_btshft
1254 if (info
->keep_memory
)
1255 default_copy
= FALSE
;
1257 default_copy
= TRUE
;
1259 symcount
= obj_raw_syment_count (abfd
);
1261 /* We keep a list of the linker hash table entries that correspond
1262 to each external symbol. */
1263 amt
= symcount
* sizeof (struct xcoff_link_hash_entry
*);
1264 sym_hash
= bfd_zalloc (abfd
, amt
);
1265 if (sym_hash
== NULL
&& symcount
!= 0)
1267 coff_data (abfd
)->sym_hashes
= (struct coff_link_hash_entry
**) sym_hash
;
1269 /* Because of the weird stuff we are doing with XCOFF csects, we can
1270 not easily determine which section a symbol is in, so we store
1271 the information in the tdata for the input file. */
1272 amt
= symcount
* sizeof (asection
*);
1273 csect_cache
= bfd_zalloc (abfd
, amt
);
1274 if (csect_cache
== NULL
&& symcount
!= 0)
1276 xcoff_data (abfd
)->csects
= csect_cache
;
1278 /* We garbage-collect line-number information on a symbol-by-symbol
1279 basis, so we need to have quick access to the number of entries
1281 amt
= symcount
* sizeof (unsigned int);
1282 lineno_counts
= bfd_zalloc (abfd
, amt
);
1283 if (lineno_counts
== NULL
&& symcount
!= 0)
1285 xcoff_data (abfd
)->lineno_counts
= lineno_counts
;
1287 /* While splitting sections into csects, we need to assign the
1288 relocs correctly. The relocs and the csects must both be in
1289 order by VMA within a given section, so we handle this by
1290 scanning along the relocs as we process the csects. We index
1291 into reloc_info using the section target_index. */
1292 amt
= abfd
->section_count
+ 1;
1293 amt
*= sizeof (struct reloc_info_struct
);
1294 reloc_info
= bfd_zmalloc (amt
);
1295 if (reloc_info
== NULL
)
1298 /* Read in the relocs and line numbers for each section. */
1299 linesz
= bfd_coff_linesz (abfd
);
1301 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1305 if ((o
->flags
& SEC_RELOC
) != 0)
1307 reloc_info
[o
->target_index
].relocs
=
1308 xcoff_read_internal_relocs (abfd
, o
, TRUE
, NULL
, FALSE
, NULL
);
1309 amt
= o
->reloc_count
;
1310 amt
*= sizeof (asection
*);
1311 reloc_info
[o
->target_index
].csects
= bfd_zmalloc (amt
);
1312 if (reloc_info
[o
->target_index
].csects
== NULL
)
1316 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1317 && o
->lineno_count
> 0)
1321 if (bfd_seek (abfd
, o
->line_filepos
, SEEK_SET
) != 0)
1323 if (_bfd_mul_overflow (linesz
, o
->lineno_count
, &amt
))
1325 bfd_set_error (bfd_error_file_too_big
);
1328 linenos
= _bfd_malloc_and_read (abfd
, amt
, amt
);
1329 if (linenos
== NULL
)
1331 reloc_info
[o
->target_index
].linenos
= linenos
;
1335 /* Don't let the linker relocation routines discard the symbols. */
1336 obj_coff_keep_syms (abfd
) = TRUE
;
1342 symesz
= bfd_coff_symesz (abfd
);
1343 BFD_ASSERT (symesz
== bfd_coff_auxesz (abfd
));
1344 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
1345 esym_end
= esym
+ symcount
* symesz
;
1347 while (esym
< esym_end
)
1349 struct internal_syment sym
;
1350 union internal_auxent aux
;
1352 char buf
[SYMNMLEN
+ 1];
1356 struct xcoff_link_hash_entry
*set_toc
;
1358 bfd_coff_swap_sym_in (abfd
, (void *) esym
, (void *) &sym
);
1360 /* In this pass we are only interested in symbols with csect
1362 if (!CSECT_SYM_P (sym
.n_sclass
))
1365 Normally csect is a .pr, .rw etc. created in the loop
1366 If C_FILE or first time, handle special
1368 Advance esym, sym_hash, csect_hash ptrs. */
1369 if (sym
.n_sclass
== C_FILE
|| sym
.n_sclass
== C_DWARF
)
1372 *csect_cache
= csect
;
1373 else if (first_csect
== NULL
1374 || sym
.n_sclass
== C_FILE
|| sym
.n_sclass
== C_DWARF
)
1375 *csect_cache
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1377 *csect_cache
= NULL
;
1378 esym
+= (sym
.n_numaux
+ 1) * symesz
;
1379 sym_hash
+= sym
.n_numaux
+ 1;
1380 csect_cache
+= sym
.n_numaux
+ 1;
1381 lineno_counts
+= sym
.n_numaux
+ 1;
1386 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
1391 /* If this symbol has line number information attached to it,
1392 and we're not stripping it, count the number of entries and
1393 add them to the count for this csect. In the final link pass
1394 we are going to attach line number information by symbol,
1395 rather than by section, in order to more easily handle
1396 garbage collection. */
1397 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1400 && ISFCN (sym
.n_type
))
1402 union internal_auxent auxlin
;
1404 bfd_coff_swap_aux_in (abfd
, (void *) (esym
+ symesz
),
1405 sym
.n_type
, sym
.n_sclass
,
1406 0, sym
.n_numaux
, (void *) &auxlin
);
1408 if (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
1410 asection
*enclosing
;
1411 bfd_signed_vma linoff
;
1413 enclosing
= xcoff_section_data (abfd
, csect
)->enclosing
;
1414 if (enclosing
== NULL
)
1417 /* xgettext:c-format */
1418 (_("%pB: `%s' has line numbers but no enclosing section"),
1420 bfd_set_error (bfd_error_bad_value
);
1423 linoff
= (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
1424 - enclosing
->line_filepos
);
1425 /* Explicit cast to bfd_signed_vma for compiler. */
1426 if (linoff
< (bfd_signed_vma
) (enclosing
->lineno_count
* linesz
))
1428 struct internal_lineno lin
;
1429 bfd_byte
*linpstart
;
1431 linpstart
= (reloc_info
[enclosing
->target_index
].linenos
1433 bfd_coff_swap_lineno_in (abfd
, (void *) linpstart
, (void *) &lin
);
1435 && ((bfd_size_type
) lin
.l_addr
.l_symndx
1437 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1440 bfd_byte
*linpend
, *linp
;
1442 linpend
= (reloc_info
[enclosing
->target_index
].linenos
1443 + enclosing
->lineno_count
* linesz
);
1444 for (linp
= linpstart
+ linesz
;
1448 bfd_coff_swap_lineno_in (abfd
, (void *) linp
,
1450 if (lin
.l_lnno
== 0)
1453 *lineno_counts
= (linp
- linpstart
) / linesz
;
1454 /* The setting of line_filepos will only be
1455 useful if all the line number entries for a
1456 csect are contiguous; this only matters for
1458 if (csect
->line_filepos
== 0)
1459 csect
->line_filepos
=
1460 auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1466 /* Pick up the csect auxiliary information. */
1467 if (sym
.n_numaux
== 0)
1470 /* xgettext:c-format */
1471 (_("%pB: class %d symbol `%s' has no aux entries"),
1472 abfd
, sym
.n_sclass
, name
);
1473 bfd_set_error (bfd_error_bad_value
);
1477 bfd_coff_swap_aux_in (abfd
,
1478 (void *) (esym
+ symesz
* sym
.n_numaux
),
1479 sym
.n_type
, sym
.n_sclass
,
1480 sym
.n_numaux
- 1, sym
.n_numaux
,
1483 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
1493 /* xgettext:c-format */
1494 (_("%pB: symbol `%s' has unrecognized csect type %d"),
1496 bfd_set_error (bfd_error_bad_value
);
1500 /* This is an external reference. */
1501 if (sym
.n_sclass
== C_HIDEXT
1502 || sym
.n_scnum
!= N_UNDEF
1503 || aux
.x_csect
.x_scnlen
.l
!= 0)
1506 /* xgettext:c-format */
1507 (_("%pB: bad XTY_ER symbol `%s': class %d scnum %d "
1509 abfd
, name
, sym
.n_sclass
, sym
.n_scnum
,
1510 (int64_t) aux
.x_csect
.x_scnlen
.l
);
1511 bfd_set_error (bfd_error_bad_value
);
1515 /* An XMC_XO external reference is actually a reference to
1516 an absolute location. */
1517 if (aux
.x_csect
.x_smclas
!= XMC_XO
)
1518 section
= bfd_und_section_ptr
;
1521 section
= bfd_abs_section_ptr
;
1522 value
= sym
.n_value
;
1528 csect_index
= -(unsigned) 1;
1530 /* When we see a TOC anchor, we record the TOC value. */
1531 if (aux
.x_csect
.x_smclas
== XMC_TC0
)
1533 if (sym
.n_sclass
!= C_HIDEXT
1534 || aux
.x_csect
.x_scnlen
.l
!= 0)
1537 /* xgettext:c-format */
1538 (_("%pB: XMC_TC0 symbol `%s' is class %d scnlen %" PRId64
),
1539 abfd
, name
, sym
.n_sclass
, (int64_t) aux
.x_csect
.x_scnlen
.l
);
1540 bfd_set_error (bfd_error_bad_value
);
1543 xcoff_data (abfd
)->toc
= sym
.n_value
;
1546 /* We must merge TOC entries for the same symbol. We can
1547 merge two TOC entries if they are both C_HIDEXT, they
1548 both have the same name, they are both 4 or 8 bytes long, and
1549 they both have a relocation table entry for an external
1550 symbol with the same name. Unfortunately, this means
1551 that we must look through the relocations. Ick.
1553 Logic for 32 bit vs 64 bit.
1554 32 bit has a csect length of 4 for TOC
1555 64 bit has a csect length of 8 for TOC
1557 The conditions to get past the if-check are not that bad.
1558 They are what is used to create the TOC csects in the first
1560 if (aux
.x_csect
.x_smclas
== XMC_TC
1561 && sym
.n_sclass
== C_HIDEXT
1562 && info
->output_bfd
->xvec
== abfd
->xvec
1563 && ((bfd_xcoff_is_xcoff32 (abfd
)
1564 && aux
.x_csect
.x_scnlen
.l
== 4)
1565 || (bfd_xcoff_is_xcoff64 (abfd
)
1566 && aux
.x_csect
.x_scnlen
.l
== 8)))
1568 asection
*enclosing
;
1569 struct internal_reloc
*relocs
;
1570 bfd_size_type relindx
;
1571 struct internal_reloc
*rel
;
1573 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1574 if (enclosing
== NULL
)
1577 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1578 amt
= enclosing
->reloc_count
;
1579 relindx
= xcoff_find_reloc (relocs
, amt
, sym
.n_value
);
1580 rel
= relocs
+ relindx
;
1582 /* 32 bit R_POS r_size is 31
1583 64 bit R_POS r_size is 63 */
1584 if (relindx
< enclosing
->reloc_count
1585 && rel
->r_vaddr
== (bfd_vma
) sym
.n_value
1586 && rel
->r_type
== R_POS
1587 && ((bfd_xcoff_is_xcoff32 (abfd
)
1588 && rel
->r_size
== 31)
1589 || (bfd_xcoff_is_xcoff64 (abfd
)
1590 && rel
->r_size
== 63)))
1594 struct internal_syment relsym
;
1596 erelsym
= ((bfd_byte
*) obj_coff_external_syms (abfd
)
1597 + rel
->r_symndx
* symesz
);
1598 bfd_coff_swap_sym_in (abfd
, (void *) erelsym
, (void *) &relsym
);
1599 if (EXTERN_SYM_P (relsym
.n_sclass
))
1601 const char *relname
;
1602 char relbuf
[SYMNMLEN
+ 1];
1604 struct xcoff_link_hash_entry
*h
;
1606 /* At this point we know that the TOC entry is
1607 for an externally visible symbol. */
1608 relname
= _bfd_coff_internal_syment_name (abfd
, &relsym
,
1610 if (relname
== NULL
)
1613 /* We only merge TOC entries if the TC name is
1614 the same as the symbol name. This handles
1615 the normal case, but not common cases like
1616 SYM.P4 which gcc generates to store SYM + 4
1617 in the TOC. FIXME. */
1618 if (strcmp (name
, relname
) == 0)
1620 copy
= (! info
->keep_memory
1621 || relsym
._n
._n_n
._n_zeroes
!= 0
1622 || relsym
._n
._n_n
._n_offset
== 0);
1623 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1624 relname
, TRUE
, copy
,
1629 /* At this point h->root.type could be
1630 bfd_link_hash_new. That should be OK,
1631 since we know for sure that we will come
1632 across this symbol as we step through the
1635 /* We store h in *sym_hash for the
1636 convenience of the relocate_section
1640 if (h
->toc_section
!= NULL
)
1642 asection
**rel_csects
;
1644 /* We already have a TOC entry for this
1645 symbol, so we can just ignore this
1648 reloc_info
[enclosing
->target_index
].csects
;
1649 rel_csects
[relindx
] = bfd_und_section_ptr
;
1653 /* We are about to create a TOC entry for
1662 asection
*enclosing
;
1664 /* We need to create a new section. We get the name from
1665 the csect storage mapping class, so that the linker can
1666 accumulate similar csects together. */
1668 csect
= bfd_xcoff_create_csect_from_smclas(abfd
, &aux
, name
);
1672 /* The enclosing section is the main section : .data, .text
1673 or .bss that the csect is coming from. */
1674 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1675 if (enclosing
== NULL
)
1678 if (! bfd_is_abs_section (enclosing
)
1679 && ((bfd_vma
) sym
.n_value
< enclosing
->vma
1680 || ((bfd_vma
) sym
.n_value
+ aux
.x_csect
.x_scnlen
.l
1681 > enclosing
->vma
+ enclosing
->size
)))
1684 /* xgettext:c-format */
1685 (_("%pB: csect `%s' not in enclosing section"),
1687 bfd_set_error (bfd_error_bad_value
);
1690 csect
->vma
= sym
.n_value
;
1691 csect
->filepos
= (enclosing
->filepos
1694 csect
->size
= aux
.x_csect
.x_scnlen
.l
;
1695 csect
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
;
1696 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1698 /* Record the enclosing section in the tdata for this new
1700 amt
= sizeof (struct coff_section_tdata
);
1701 csect
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
1702 if (csect
->used_by_bfd
== NULL
)
1704 amt
= sizeof (struct xcoff_section_tdata
);
1705 coff_section_data (abfd
, csect
)->tdata
= bfd_zalloc (abfd
, amt
);
1706 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1708 xcoff_section_data (abfd
, csect
)->enclosing
= enclosing
;
1709 xcoff_section_data (abfd
, csect
)->lineno_count
=
1710 enclosing
->lineno_count
;
1712 if (enclosing
->owner
== abfd
)
1714 struct internal_reloc
*relocs
;
1715 bfd_size_type relindx
;
1716 struct internal_reloc
*rel
;
1717 asection
**rel_csect
;
1719 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1720 amt
= enclosing
->reloc_count
;
1721 relindx
= xcoff_find_reloc (relocs
, amt
, csect
->vma
);
1723 rel
= relocs
+ relindx
;
1724 rel_csect
= (reloc_info
[enclosing
->target_index
].csects
1727 csect
->rel_filepos
= (enclosing
->rel_filepos
1728 + relindx
* bfd_coff_relsz (abfd
));
1729 while (relindx
< enclosing
->reloc_count
1730 && *rel_csect
== NULL
1731 && rel
->r_vaddr
< csect
->vma
+ csect
->size
)
1735 csect
->flags
|= SEC_RELOC
;
1736 ++csect
->reloc_count
;
1743 /* There are a number of other fields and section flags
1744 which we do not bother to set. */
1746 csect_index
= ((esym
1747 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1750 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1752 if (first_csect
== NULL
)
1753 first_csect
= csect
;
1755 /* If this symbol is external, we treat it as starting at the
1756 beginning of the newly created section. */
1757 if (EXTERN_SYM_P (sym
.n_sclass
))
1763 /* If this is a TOC section for a symbol, record it. */
1764 if (set_toc
!= NULL
)
1765 set_toc
->toc_section
= csect
;
1770 /* This is a label definition. The x_scnlen field is the
1771 symbol index of the csect. Usually the XTY_LD symbol will
1772 follow its appropriate XTY_SD symbol. The .set pseudo op can
1773 cause the XTY_LD to not follow the XTY_SD symbol. */
1778 if (aux
.x_csect
.x_scnlen
.l
< 0
1779 || (aux
.x_csect
.x_scnlen
.l
1780 >= esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)))
1784 section
= xcoff_data (abfd
)->csects
[aux
.x_csect
.x_scnlen
.l
];
1786 || (section
->flags
& SEC_HAS_CONTENTS
) == 0)
1792 /* xgettext:c-format */
1793 (_("%pB: misplaced XTY_LD `%s'"),
1795 bfd_set_error (bfd_error_bad_value
);
1799 value
= sym
.n_value
- csect
->vma
;
1804 /* This is an unitialized csect. We could base the name on
1805 the storage mapping class, but we don't bother except for
1806 an XMC_TD symbol. If this csect is externally visible,
1807 it is a common symbol. We put XMC_TD symbols in sections
1808 named .tocbss, and rely on the linker script to put that
1811 if (aux
.x_csect
.x_smclas
== XMC_TD
)
1813 /* The linker script puts the .td section in the data
1814 section after the .tc section. */
1815 csect
= bfd_make_section_anyway_with_flags (abfd
, ".td",
1819 csect
= bfd_make_section_anyway_with_flags (abfd
, ".bss",
1824 csect
->vma
= sym
.n_value
;
1825 csect
->size
= aux
.x_csect
.x_scnlen
.l
;
1826 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1827 /* There are a number of other fields and section flags
1828 which we do not bother to set. */
1830 csect_index
= ((esym
1831 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1834 amt
= sizeof (struct coff_section_tdata
);
1835 csect
->used_by_bfd
= bfd_zalloc (abfd
, amt
);
1836 if (csect
->used_by_bfd
== NULL
)
1838 amt
= sizeof (struct xcoff_section_tdata
);
1839 coff_section_data (abfd
, csect
)->tdata
= bfd_zalloc (abfd
, amt
);
1840 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1842 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1844 if (first_csect
== NULL
)
1845 first_csect
= csect
;
1847 if (EXTERN_SYM_P (sym
.n_sclass
))
1849 csect
->flags
|= SEC_IS_COMMON
;
1852 value
= aux
.x_csect
.x_scnlen
.l
;
1858 /* Check for magic symbol names. */
1859 if ((smtyp
== XTY_SD
|| smtyp
== XTY_CM
)
1860 && aux
.x_csect
.x_smclas
!= XMC_TC
1861 && aux
.x_csect
.x_smclas
!= XMC_TD
)
1867 if (strcmp (name
, "_text") == 0)
1868 i
= XCOFF_SPECIAL_SECTION_TEXT
;
1869 else if (strcmp (name
, "_etext") == 0)
1870 i
= XCOFF_SPECIAL_SECTION_ETEXT
;
1871 else if (strcmp (name
, "_data") == 0)
1872 i
= XCOFF_SPECIAL_SECTION_DATA
;
1873 else if (strcmp (name
, "_edata") == 0)
1874 i
= XCOFF_SPECIAL_SECTION_EDATA
;
1875 else if (strcmp (name
, "_end") == 0)
1876 i
= XCOFF_SPECIAL_SECTION_END
;
1878 else if (name
[0] == 'e' && strcmp (name
, "end") == 0)
1879 i
= XCOFF_SPECIAL_SECTION_END2
;
1882 xcoff_hash_table (info
)->special_sections
[i
] = csect
;
1885 /* Now we have enough information to add the symbol to the
1886 linker hash table. */
1888 if (EXTERN_SYM_P (sym
.n_sclass
))
1890 bfd_boolean copy
, ok
;
1893 BFD_ASSERT (section
!= NULL
);
1895 /* We must copy the name into memory if we got it from the
1896 syment itself, rather than the string table. */
1897 copy
= default_copy
;
1898 if (sym
._n
._n_n
._n_zeroes
!= 0
1899 || sym
._n
._n_n
._n_offset
== 0)
1902 /* Ignore global linkage code when linking statically. */
1903 if (info
->static_link
1904 && (smtyp
== XTY_SD
|| smtyp
== XTY_LD
)
1905 && aux
.x_csect
.x_smclas
== XMC_GL
)
1907 section
= bfd_und_section_ptr
;
1911 /* The AIX linker appears to only detect multiple symbol
1912 definitions when there is a reference to the symbol. If
1913 a symbol is defined multiple times, and the only
1914 references are from the same object file, the AIX linker
1915 appears to permit it. It does not merge the different
1916 definitions, but handles them independently. On the
1917 other hand, if there is a reference, the linker reports
1920 This matters because the AIX <net/net_globals.h> header
1921 file actually defines an initialized array, so we have to
1922 actually permit that to work.
1924 Just to make matters even more confusing, the AIX linker
1925 appears to permit multiple symbol definitions whenever
1926 the second definition is in an archive rather than an
1927 object file. This may be a consequence of the manner in
1928 which it handles archives: I think it may load the entire
1929 archive in as separate csects, and then let garbage
1930 collection discard symbols.
1932 We also have to handle the case of statically linking a
1933 shared object, which will cause symbol redefinitions,
1934 although this is an easier case to detect. */
1935 else if (info
->output_bfd
->xvec
== abfd
->xvec
)
1937 if (! bfd_is_und_section (section
))
1938 *sym_hash
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1939 name
, TRUE
, copy
, FALSE
);
1941 /* Make a copy of the symbol name to prevent problems with
1943 *sym_hash
= ((struct xcoff_link_hash_entry
*)
1944 bfd_wrapped_link_hash_lookup (abfd
, info
, name
,
1945 TRUE
, TRUE
, FALSE
));
1947 if (*sym_hash
== NULL
)
1949 if (((*sym_hash
)->root
.type
== bfd_link_hash_defined
1950 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1951 && ! bfd_is_und_section (section
)
1952 && ! bfd_is_com_section (section
))
1954 /* This is a second definition of a defined symbol. */
1955 if (((*sym_hash
)->flags
& XCOFF_DEF_REGULAR
) == 0
1956 && ((*sym_hash
)->flags
& XCOFF_DEF_DYNAMIC
) != 0)
1958 /* The existing symbol is from a shared library.
1960 (*sym_hash
)->root
.type
= bfd_link_hash_undefined
;
1961 (*sym_hash
)->root
.u
.undef
.abfd
=
1962 (*sym_hash
)->root
.u
.def
.section
->owner
;
1964 else if (abfd
->my_archive
!= NULL
)
1966 /* This is a redefinition in an object contained
1967 in an archive. Just ignore it. See the
1969 section
= bfd_und_section_ptr
;
1972 else if (sym
.n_sclass
== C_AIX_WEAKEXT
1973 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1975 /* At least one of the definitions is weak.
1976 Allow the normal rules to take effect. */
1978 else if ((*sym_hash
)->root
.u
.undef
.next
!= NULL
1979 || info
->hash
->undefs_tail
== &(*sym_hash
)->root
)
1981 /* This symbol has been referenced. In this
1982 case, we just continue and permit the
1983 multiple definition error. See the comment
1984 above about the behaviour of the AIX linker. */
1986 else if ((*sym_hash
)->smclas
== aux
.x_csect
.x_smclas
)
1988 /* The symbols are both csects of the same
1989 class. There is at least a chance that this
1990 is a semi-legitimate redefinition. */
1991 section
= bfd_und_section_ptr
;
1993 (*sym_hash
)->flags
|= XCOFF_MULTIPLY_DEFINED
;
1996 else if (((*sym_hash
)->flags
& XCOFF_MULTIPLY_DEFINED
) != 0
1997 && (*sym_hash
)->root
.type
== bfd_link_hash_defined
1998 && (bfd_is_und_section (section
)
1999 || bfd_is_com_section (section
)))
2001 /* This is a reference to a multiply defined symbol.
2002 Report the error now. See the comment above
2003 about the behaviour of the AIX linker. We could
2004 also do this with warning symbols, but I'm not
2005 sure the XCOFF linker is wholly prepared to
2006 handle them, and that would only be a warning,
2008 (*info
->callbacks
->multiple_definition
) (info
,
2012 /* Try not to give this error too many times. */
2013 (*sym_hash
)->flags
&= ~XCOFF_MULTIPLY_DEFINED
;
2017 /* _bfd_generic_link_add_one_symbol may call the linker to
2018 generate an error message, and the linker may try to read
2019 the symbol table to give a good error. Right now, the
2020 line numbers are in an inconsistent state, since they are
2021 counted both in the real sections and in the new csects.
2022 We need to leave the count in the real sections so that
2023 the linker can report the line number of the error
2024 correctly, so temporarily clobber the link to the csects
2025 so that the linker will not try to read the line numbers
2026 a second time from the csects. */
2027 BFD_ASSERT (last_real
->next
== first_csect
);
2028 last_real
->next
= NULL
;
2029 flags
= (sym
.n_sclass
== C_EXT
? BSF_GLOBAL
: BSF_WEAK
);
2030 ok
= (_bfd_generic_link_add_one_symbol
2031 (info
, abfd
, name
, flags
, section
, value
, NULL
, copy
, TRUE
,
2032 (struct bfd_link_hash_entry
**) sym_hash
));
2033 last_real
->next
= first_csect
;
2037 if (smtyp
== XTY_CM
)
2039 if ((*sym_hash
)->root
.type
!= bfd_link_hash_common
2040 || (*sym_hash
)->root
.u
.c
.p
->section
!= csect
)
2041 /* We don't need the common csect we just created. */
2044 (*sym_hash
)->root
.u
.c
.p
->alignment_power
2045 = csect
->alignment_power
;
2048 if (info
->output_bfd
->xvec
== abfd
->xvec
)
2054 || section
== bfd_und_section_ptr
)
2055 flag
= XCOFF_REF_REGULAR
;
2057 flag
= XCOFF_DEF_REGULAR
;
2058 (*sym_hash
)->flags
|= flag
;
2060 if ((*sym_hash
)->smclas
== XMC_UA
2061 || flag
== XCOFF_DEF_REGULAR
)
2062 (*sym_hash
)->smclas
= aux
.x_csect
.x_smclas
;
2066 if (smtyp
== XTY_ER
)
2067 *csect_cache
= section
;
2070 *csect_cache
= csect
;
2072 xcoff_section_data (abfd
, csect
)->last_symndx
2073 = (esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)) / symesz
;
2076 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2077 sym_hash
+= sym
.n_numaux
+ 1;
2078 csect_cache
+= sym
.n_numaux
+ 1;
2079 lineno_counts
+= sym
.n_numaux
+ 1;
2082 BFD_ASSERT (last_real
== NULL
|| last_real
->next
== first_csect
);
2084 /* Make sure that we have seen all the relocs. */
2085 for (o
= abfd
->sections
; o
!= first_csect
; o
= o
->next
)
2087 /* Debugging sections have no csects. */
2088 if (bfd_section_flags (o
) & SEC_DEBUGGING
)
2091 /* Reset the section size and the line number count, since the
2092 data is now attached to the csects. Don't reset the size of
2093 the .debug section, since we need to read it below in
2094 bfd_xcoff_size_dynamic_sections. */
2095 if (strcmp (bfd_section_name (o
), ".debug") != 0)
2097 o
->lineno_count
= 0;
2099 if ((o
->flags
& SEC_RELOC
) != 0)
2102 struct internal_reloc
*rel
;
2103 asection
**rel_csect
;
2105 rel
= reloc_info
[o
->target_index
].relocs
;
2106 rel_csect
= reloc_info
[o
->target_index
].csects
;
2108 for (i
= 0; i
< o
->reloc_count
; i
++, rel
++, rel_csect
++)
2110 if (*rel_csect
== NULL
)
2113 /* xgettext:c-format */
2114 (_("%pB: reloc %s:%" PRId64
" not in csect"),
2115 abfd
, o
->name
, (int64_t) i
);
2116 bfd_set_error (bfd_error_bad_value
);
2120 /* We identify all function symbols that are the target
2121 of a relocation, so that we can create glue code for
2122 functions imported from dynamic objects. */
2123 if (info
->output_bfd
->xvec
== abfd
->xvec
2124 && *rel_csect
!= bfd_und_section_ptr
2125 && obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
] != NULL
)
2127 struct xcoff_link_hash_entry
*h
;
2129 h
= obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
];
2130 /* If the symbol name starts with a period, it is
2131 the code of a function. If the symbol is
2132 currently undefined, then add an undefined symbol
2133 for the function descriptor. This should do no
2134 harm, because any regular object that defines the
2135 function should also define the function
2136 descriptor. It helps, because it means that we
2137 will identify the function descriptor with a
2138 dynamic object if a dynamic object defines it. */
2139 if (h
->root
.root
.string
[0] == '.'
2140 && h
->descriptor
== NULL
)
2142 struct xcoff_link_hash_entry
*hds
;
2143 struct bfd_link_hash_entry
*bh
;
2145 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2146 h
->root
.root
.string
+ 1,
2150 if (hds
->root
.type
== bfd_link_hash_new
)
2153 if (! (_bfd_generic_link_add_one_symbol
2154 (info
, abfd
, hds
->root
.root
.string
,
2155 (flagword
) 0, bfd_und_section_ptr
,
2156 (bfd_vma
) 0, NULL
, FALSE
,
2159 hds
= (struct xcoff_link_hash_entry
*) bh
;
2161 hds
->flags
|= XCOFF_DESCRIPTOR
;
2162 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
2163 hds
->descriptor
= h
;
2164 h
->descriptor
= hds
;
2166 if (h
->root
.root
.string
[0] == '.')
2167 h
->flags
|= XCOFF_CALLED
;
2171 free (reloc_info
[o
->target_index
].csects
);
2172 reloc_info
[o
->target_index
].csects
= NULL
;
2174 /* Reset SEC_RELOC and the reloc_count, since the reloc
2175 information is now attached to the csects. */
2176 o
->flags
&=~ SEC_RELOC
;
2179 /* If we are not keeping memory, free the reloc information. */
2180 if (! info
->keep_memory
2181 && coff_section_data (abfd
, o
) != NULL
2182 && coff_section_data (abfd
, o
)->relocs
!= NULL
2183 && ! coff_section_data (abfd
, o
)->keep_relocs
)
2185 free (coff_section_data (abfd
, o
)->relocs
);
2186 coff_section_data (abfd
, o
)->relocs
= NULL
;
2190 /* Free up the line numbers. FIXME: We could cache these
2191 somewhere for the final link, to avoid reading them again. */
2192 if (reloc_info
[o
->target_index
].linenos
!= NULL
)
2194 free (reloc_info
[o
->target_index
].linenos
);
2195 reloc_info
[o
->target_index
].linenos
= NULL
;
2201 obj_coff_keep_syms (abfd
) = keep_syms
;
2206 if (reloc_info
!= NULL
)
2208 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2210 if (reloc_info
[o
->target_index
].csects
!= NULL
)
2211 free (reloc_info
[o
->target_index
].csects
);
2212 if (reloc_info
[o
->target_index
].linenos
!= NULL
)
2213 free (reloc_info
[o
->target_index
].linenos
);
2217 obj_coff_keep_syms (abfd
) = keep_syms
;
2224 /* Add symbols from an XCOFF object file. */
2227 xcoff_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2229 if (! _bfd_coff_get_external_symbols (abfd
))
2231 if (! xcoff_link_add_symbols (abfd
, info
))
2233 if (! info
->keep_memory
)
2235 if (! _bfd_coff_free_symbols (abfd
))
2241 /* Look through the loader symbols to see if this dynamic object
2242 should be included in the link. The native linker uses the loader
2243 symbols, not the normal symbol table, so we do too. */
2246 xcoff_link_check_dynamic_ar_symbols (bfd
*abfd
,
2247 struct bfd_link_info
*info
,
2248 bfd_boolean
*pneeded
,
2253 struct internal_ldhdr ldhdr
;
2254 const char *strings
;
2255 bfd_byte
*elsym
, *elsymend
;
2259 lsec
= bfd_get_section_by_name (abfd
, ".loader");
2261 /* There are no symbols, so don't try to include it. */
2264 if (! xcoff_get_section_contents (abfd
, lsec
))
2266 contents
= coff_section_data (abfd
, lsec
)->contents
;
2268 bfd_xcoff_swap_ldhdr_in (abfd
, contents
, &ldhdr
);
2270 strings
= (char *) contents
+ ldhdr
.l_stoff
;
2272 elsym
= contents
+ bfd_xcoff_loader_symbol_offset (abfd
, &ldhdr
);
2274 elsymend
= elsym
+ ldhdr
.l_nsyms
* bfd_xcoff_ldsymsz (abfd
);
2275 for (; elsym
< elsymend
; elsym
+= bfd_xcoff_ldsymsz (abfd
))
2277 struct internal_ldsym ldsym
;
2278 char nambuf
[SYMNMLEN
+ 1];
2280 struct bfd_link_hash_entry
*h
;
2282 bfd_xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
2284 /* We are only interested in exported symbols. */
2285 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
2288 if (ldsym
._l
._l_l
._l_zeroes
== 0)
2289 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
2292 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
2293 nambuf
[SYMNMLEN
] = '\0';
2297 h
= bfd_link_hash_lookup (info
->hash
, name
, FALSE
, FALSE
, TRUE
);
2299 /* We are only interested in symbols that are currently
2300 undefined. At this point we know that we are using an XCOFF
2303 && h
->type
== bfd_link_hash_undefined
2304 && (((struct xcoff_link_hash_entry
*) h
)->flags
2305 & XCOFF_DEF_DYNAMIC
) == 0)
2307 if (!(*info
->callbacks
2308 ->add_archive_element
) (info
, abfd
, name
, subsbfd
))
2315 /* We do not need this shared object. */
2316 if (contents
!= NULL
&& ! coff_section_data (abfd
, lsec
)->keep_contents
)
2318 free (coff_section_data (abfd
, lsec
)->contents
);
2319 coff_section_data (abfd
, lsec
)->contents
= NULL
;
2325 /* Look through the symbols to see if this object file should be
2326 included in the link. */
2329 xcoff_link_check_ar_symbols (bfd
*abfd
,
2330 struct bfd_link_info
*info
,
2331 bfd_boolean
*pneeded
,
2334 bfd_size_type symesz
;
2340 if ((abfd
->flags
& DYNAMIC
) != 0
2341 && ! info
->static_link
2342 && info
->output_bfd
->xvec
== abfd
->xvec
)
2343 return xcoff_link_check_dynamic_ar_symbols (abfd
, info
, pneeded
, subsbfd
);
2345 symesz
= bfd_coff_symesz (abfd
);
2346 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
2347 esym_end
= esym
+ obj_raw_syment_count (abfd
) * symesz
;
2348 while (esym
< esym_end
)
2350 struct internal_syment sym
;
2352 bfd_coff_swap_sym_in (abfd
, (void *) esym
, (void *) &sym
);
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
))
2387 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2390 /* We do not need this object file. */
2394 /* Check a single archive element to see if we need to include it in
2395 the link. *PNEEDED is set according to whether this element is
2396 needed in the link or not. This is called via
2397 _bfd_generic_link_add_archive_symbols. */
2400 xcoff_link_check_archive_element (bfd
*abfd
,
2401 struct bfd_link_info
*info
,
2402 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
2403 const char *name ATTRIBUTE_UNUSED
,
2404 bfd_boolean
*pneeded
)
2406 bfd_boolean keep_syms_p
;
2409 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2410 if (!_bfd_coff_get_external_symbols (abfd
))
2414 if (!xcoff_link_check_ar_symbols (abfd
, info
, pneeded
, &abfd
))
2419 /* Potentially, the add_archive_element hook may have set a
2420 substitute BFD for us. */
2424 && !_bfd_coff_free_symbols (oldbfd
))
2426 keep_syms_p
= (obj_coff_external_syms (abfd
) != NULL
);
2427 if (!_bfd_coff_get_external_symbols (abfd
))
2430 if (!xcoff_link_add_symbols (abfd
, info
))
2432 if (info
->keep_memory
)
2438 if (!_bfd_coff_free_symbols (abfd
))
2445 /* Given an XCOFF BFD, add symbols to the global hash table as
2449 _bfd_xcoff_bfd_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
2451 switch (bfd_get_format (abfd
))
2454 return xcoff_link_add_object_symbols (abfd
, info
);
2457 /* If the archive has a map, do the usual search. We then need
2458 to check the archive for dynamic objects, because they may not
2459 appear in the archive map even though they should, perhaps, be
2460 included. If the archive has no map, we just consider each object
2461 file in turn, since that apparently is what the AIX native linker
2463 if (bfd_has_map (abfd
))
2465 if (! (_bfd_generic_link_add_archive_symbols
2466 (abfd
, info
, xcoff_link_check_archive_element
)))
2473 member
= bfd_openr_next_archived_file (abfd
, NULL
);
2474 while (member
!= NULL
)
2476 if (bfd_check_format (member
, bfd_object
)
2477 && (info
->output_bfd
->xvec
== member
->xvec
)
2478 && (! bfd_has_map (abfd
) || (member
->flags
& DYNAMIC
) != 0))
2482 if (! xcoff_link_check_archive_element (member
, info
,
2483 NULL
, NULL
, &needed
))
2486 member
->archive_pass
= -1;
2488 member
= bfd_openr_next_archived_file (abfd
, member
);
2495 bfd_set_error (bfd_error_wrong_format
);
2501 _bfd_xcoff_define_common_symbol (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2502 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
2503 struct bfd_link_hash_entry
*harg
)
2505 struct xcoff_link_hash_entry
*h
;
2507 if (!bfd_generic_define_common_symbol (output_bfd
, info
, harg
))
2510 h
= (struct xcoff_link_hash_entry
*) harg
;
2511 h
->flags
|= XCOFF_DEF_REGULAR
;
2515 /* If symbol H has not been interpreted as a function descriptor,
2516 see whether it should be. Set up its descriptor information if so. */
2519 xcoff_find_function (struct bfd_link_info
*info
,
2520 struct xcoff_link_hash_entry
*h
)
2522 if ((h
->flags
& XCOFF_DESCRIPTOR
) == 0
2523 && h
->root
.root
.string
[0] != '.')
2526 struct xcoff_link_hash_entry
*hfn
;
2529 amt
= strlen (h
->root
.root
.string
) + 2;
2530 fnname
= bfd_malloc (amt
);
2534 strcpy (fnname
+ 1, h
->root
.root
.string
);
2535 hfn
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2536 fnname
, FALSE
, FALSE
, TRUE
);
2539 && hfn
->smclas
== XMC_PR
2540 && (hfn
->root
.type
== bfd_link_hash_defined
2541 || hfn
->root
.type
== bfd_link_hash_defweak
))
2543 h
->flags
|= XCOFF_DESCRIPTOR
;
2544 h
->descriptor
= hfn
;
2545 hfn
->descriptor
= h
;
2551 /* Return true if the given bfd contains at least one shared object. */
2554 xcoff_archive_contains_shared_object_p (struct bfd_link_info
*info
,
2557 struct xcoff_archive_info
*archive_info
;
2560 archive_info
= xcoff_get_archive_info (info
, archive
);
2561 if (!archive_info
->know_contains_shared_object_p
)
2563 member
= bfd_openr_next_archived_file (archive
, NULL
);
2564 while (member
!= NULL
&& (member
->flags
& DYNAMIC
) == 0)
2565 member
= bfd_openr_next_archived_file (archive
, member
);
2567 archive_info
->contains_shared_object_p
= (member
!= NULL
);
2568 archive_info
->know_contains_shared_object_p
= 1;
2570 return archive_info
->contains_shared_object_p
;
2573 /* Symbol H qualifies for export by -bexpfull. Return true if it also
2574 qualifies for export by -bexpall. */
2577 xcoff_covered_by_expall_p (struct xcoff_link_hash_entry
*h
)
2579 /* Exclude symbols beginning with '_'. */
2580 if (h
->root
.root
.string
[0] == '_')
2583 /* Exclude archive members that would otherwise be unreferenced. */
2584 if ((h
->flags
& XCOFF_MARK
) == 0
2585 && (h
->root
.type
== bfd_link_hash_defined
2586 || h
->root
.type
== bfd_link_hash_defweak
)
2587 && h
->root
.u
.def
.section
->owner
!= NULL
2588 && h
->root
.u
.def
.section
->owner
->my_archive
!= NULL
)
2594 /* Return true if symbol H qualifies for the forms of automatic export
2595 specified by AUTO_EXPORT_FLAGS. */
2598 xcoff_auto_export_p (struct bfd_link_info
*info
,
2599 struct xcoff_link_hash_entry
*h
,
2600 unsigned int auto_export_flags
)
2602 /* Don't automatically export things that were explicitly exported. */
2603 if ((h
->flags
& XCOFF_EXPORT
) != 0)
2606 /* Don't export things that we don't define. */
2607 if ((h
->flags
& XCOFF_DEF_REGULAR
) == 0)
2610 /* Don't export functions; export their descriptors instead. */
2611 if (h
->root
.root
.string
[0] == '.')
2614 /* We don't export a symbol which is being defined by an object
2615 included from an archive which contains a shared object. The
2616 rationale is that if an archive contains both an unshared and
2617 a shared object, then there must be some reason that the
2618 unshared object is unshared, and we don't want to start
2619 providing a shared version of it. In particular, this solves
2620 a bug involving the _savefNN set of functions. gcc will call
2621 those functions without providing a slot to restore the TOC,
2622 so it is essential that these functions be linked in directly
2623 and not from a shared object, which means that a shared
2624 object which also happens to link them in must not export
2625 them. This is confusing, but I haven't been able to think of
2626 a different approach. Note that the symbols can, of course,
2627 be exported explicitly. */
2628 if (h
->root
.type
== bfd_link_hash_defined
2629 || h
->root
.type
== bfd_link_hash_defweak
)
2633 owner
= h
->root
.u
.def
.section
->owner
;
2635 && owner
->my_archive
!= NULL
2636 && xcoff_archive_contains_shared_object_p (info
, owner
->my_archive
))
2640 /* Otherwise, all symbols are exported by -bexpfull. */
2641 if ((auto_export_flags
& XCOFF_EXPFULL
) != 0)
2644 /* Despite its name, -bexpall exports most but not all symbols. */
2645 if ((auto_export_flags
& XCOFF_EXPALL
) != 0
2646 && xcoff_covered_by_expall_p (h
))
2652 /* Return true if relocation REL needs to be copied to the .loader section.
2653 If REL is against a global symbol, H is that symbol, otherwise it
2657 xcoff_need_ldrel_p (struct bfd_link_info
*info
, struct internal_reloc
*rel
,
2658 struct xcoff_link_hash_entry
*h
)
2660 if (!xcoff_hash_table (info
)->loader_section
)
2663 switch (rel
->r_type
)
2670 /* We should never need a .loader reloc for a TOC-relative reloc. */
2674 /* In this case, relocations against defined symbols can be resolved
2677 || h
->root
.type
== bfd_link_hash_defined
2678 || h
->root
.type
== bfd_link_hash_defweak
2679 || h
->root
.type
== bfd_link_hash_common
)
2682 /* We will always provide a local definition of function symbols,
2683 even if we don't have one yet. */
2684 if ((h
->flags
& XCOFF_CALLED
) != 0)
2693 /* Absolute relocations against absolute symbols can be
2694 resolved statically. */
2695 if (h
!= NULL
&& bfd_is_abs_symbol (&h
->root
))
2702 /* Mark a symbol as not being garbage, including the section in which
2705 static inline bfd_boolean
2706 xcoff_mark_symbol (struct bfd_link_info
*info
, struct xcoff_link_hash_entry
*h
)
2708 if ((h
->flags
& XCOFF_MARK
) != 0)
2711 h
->flags
|= XCOFF_MARK
;
2713 /* If we're marking an undefined symbol, try find some way of
2715 if (!bfd_link_relocatable (info
)
2716 && (h
->flags
& XCOFF_IMPORT
) == 0
2717 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
2718 && (h
->root
.type
== bfd_link_hash_undefined
2719 || h
->root
.type
== bfd_link_hash_undefweak
))
2721 /* First check whether this symbol can be interpreted as an
2722 undefined function descriptor for a defined function symbol. */
2723 if (!xcoff_find_function (info
, h
))
2726 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
2727 && (h
->descriptor
->root
.type
== bfd_link_hash_defined
2728 || h
->descriptor
->root
.type
== bfd_link_hash_defweak
))
2730 /* This is a descriptor for a defined symbol, but the input
2731 objects have not defined the descriptor itself. Fill in
2732 the definition automatically.
2734 Note that we do this even if we found a dynamic definition
2735 of H. The local function definition logically overrides
2739 sec
= xcoff_hash_table (info
)->descriptor_section
;
2740 h
->root
.type
= bfd_link_hash_defined
;
2741 h
->root
.u
.def
.section
= sec
;
2742 h
->root
.u
.def
.value
= sec
->size
;
2744 h
->flags
|= XCOFF_DEF_REGULAR
;
2746 /* The size of the function descriptor depends on whether this
2747 is xcoff32 (12) or xcoff64 (24). */
2748 sec
->size
+= bfd_xcoff_function_descriptor_size (sec
->owner
);
2750 /* A function descriptor uses two relocs: one for the
2751 associated code, and one for the TOC address. */
2752 xcoff_hash_table (info
)->ldrel_count
+= 2;
2753 sec
->reloc_count
+= 2;
2755 /* Mark the function itself. */
2756 if (!xcoff_mark_symbol (info
, h
->descriptor
))
2759 /* Mark the TOC section, so that we get an anchor
2760 to relocate against. */
2761 if (!xcoff_mark (info
, xcoff_hash_table (info
)->toc_section
))
2764 /* We handle writing out the contents of the descriptor in
2765 xcoff_write_global_symbol. */
2767 else if (info
->static_link
)
2768 /* We can't get a symbol value dynamically, so just assume
2769 that it's undefined. */
2770 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2771 else if ((h
->flags
& XCOFF_CALLED
) != 0)
2773 /* This is a function symbol for which we need to create
2776 struct xcoff_link_hash_entry
*hds
;
2778 /* Mark the descriptor (and its TOC section). */
2779 hds
= h
->descriptor
;
2780 BFD_ASSERT ((hds
->root
.type
== bfd_link_hash_undefined
2781 || hds
->root
.type
== bfd_link_hash_undefweak
)
2782 && (hds
->flags
& XCOFF_DEF_REGULAR
) == 0);
2783 if (!xcoff_mark_symbol (info
, hds
))
2786 /* Treat this symbol as undefined if the descriptor was. */
2787 if ((hds
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
2788 h
->flags
|= XCOFF_WAS_UNDEFINED
;
2790 /* Allocate room for the global linkage code itself. */
2791 sec
= xcoff_hash_table (info
)->linkage_section
;
2792 h
->root
.type
= bfd_link_hash_defined
;
2793 h
->root
.u
.def
.section
= sec
;
2794 h
->root
.u
.def
.value
= sec
->size
;
2796 h
->flags
|= XCOFF_DEF_REGULAR
;
2797 sec
->size
+= bfd_xcoff_glink_code_size (info
->output_bfd
);
2799 /* The global linkage code requires a TOC entry for the
2801 if (hds
->toc_section
== NULL
)
2806 xcoff32 uses 4 bytes in the toc.
2807 xcoff64 uses 8 bytes in the toc. */
2808 if (bfd_xcoff_is_xcoff64 (info
->output_bfd
))
2810 else if (bfd_xcoff_is_xcoff32 (info
->output_bfd
))
2815 /* Allocate room in the fallback TOC section. */
2816 hds
->toc_section
= xcoff_hash_table (info
)->toc_section
;
2817 hds
->u
.toc_offset
= hds
->toc_section
->size
;
2818 hds
->toc_section
->size
+= byte_size
;
2819 if (!xcoff_mark (info
, hds
->toc_section
))
2822 /* Allocate room for a static and dynamic R_TOC
2824 ++xcoff_hash_table (info
)->ldrel_count
;
2825 ++hds
->toc_section
->reloc_count
;
2827 /* Set the index to -2 to force this symbol to
2830 hds
->flags
|= XCOFF_SET_TOC
| XCOFF_LDREL
;
2833 else if ((h
->flags
& XCOFF_DEF_DYNAMIC
) == 0)
2835 /* Record that the symbol was undefined, then import it.
2836 -brtl links use a special fake import file. */
2837 h
->flags
|= XCOFF_WAS_UNDEFINED
| XCOFF_IMPORT
;
2838 if (xcoff_hash_table (info
)->rtld
)
2840 if (!xcoff_set_import_path (info
, h
, "", "..", ""))
2845 if (!xcoff_set_import_path (info
, h
, NULL
, NULL
, NULL
))
2851 if (h
->root
.type
== bfd_link_hash_defined
2852 || h
->root
.type
== bfd_link_hash_defweak
)
2856 hsec
= h
->root
.u
.def
.section
;
2857 if (! bfd_is_abs_section (hsec
)
2858 && (hsec
->flags
& SEC_MARK
) == 0)
2860 if (! xcoff_mark (info
, hsec
))
2865 if (h
->toc_section
!= NULL
2866 && (h
->toc_section
->flags
& SEC_MARK
) == 0)
2868 if (! xcoff_mark (info
, h
->toc_section
))
2875 /* Look for a symbol called NAME. If the symbol is defined, mark it.
2876 If the symbol exists, set FLAGS. */
2879 xcoff_mark_symbol_by_name (struct bfd_link_info
*info
,
2880 const char *name
, unsigned int flags
)
2882 struct xcoff_link_hash_entry
*h
;
2884 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
,
2885 FALSE
, FALSE
, TRUE
);
2889 if (h
->root
.type
== bfd_link_hash_defined
2890 || h
->root
.type
== bfd_link_hash_defweak
)
2892 if (!xcoff_mark (info
, h
->root
.u
.def
.section
))
2899 /* The mark phase of garbage collection. For a given section, mark
2900 it, and all the sections which define symbols to which it refers.
2901 Because this function needs to look at the relocs, we also count
2902 the number of relocs which need to be copied into the .loader
2906 xcoff_mark (struct bfd_link_info
*info
, asection
*sec
)
2908 if (bfd_is_abs_section (sec
)
2909 || (sec
->flags
& SEC_MARK
) != 0)
2912 sec
->flags
|= SEC_MARK
;
2914 if (sec
->owner
->xvec
== info
->output_bfd
->xvec
2915 && coff_section_data (sec
->owner
, sec
) != NULL
2916 && xcoff_section_data (sec
->owner
, sec
) != NULL
)
2918 struct xcoff_link_hash_entry
**syms
;
2919 struct internal_reloc
*rel
, *relend
;
2921 unsigned long i
, first
, last
;
2923 /* Mark all the symbols in this section. */
2924 syms
= obj_xcoff_sym_hashes (sec
->owner
);
2925 csects
= xcoff_data (sec
->owner
)->csects
;
2926 first
= xcoff_section_data (sec
->owner
, sec
)->first_symndx
;
2927 last
= xcoff_section_data (sec
->owner
, sec
)->last_symndx
;
2928 for (i
= first
; i
<= last
; i
++)
2929 if (csects
[i
] == sec
2931 && (syms
[i
]->flags
& XCOFF_MARK
) == 0)
2933 if (!xcoff_mark_symbol (info
, syms
[i
]))
2937 /* Look through the section relocs. */
2938 if ((sec
->flags
& SEC_RELOC
) != 0
2939 && sec
->reloc_count
> 0)
2941 rel
= xcoff_read_internal_relocs (sec
->owner
, sec
, TRUE
,
2945 relend
= rel
+ sec
->reloc_count
;
2946 for (; rel
< relend
; rel
++)
2948 struct xcoff_link_hash_entry
*h
;
2950 if ((unsigned int) rel
->r_symndx
2951 > obj_raw_syment_count (sec
->owner
))
2954 h
= obj_xcoff_sym_hashes (sec
->owner
)[rel
->r_symndx
];
2957 if ((h
->flags
& XCOFF_MARK
) == 0)
2959 if (!xcoff_mark_symbol (info
, h
))
2967 rsec
= xcoff_data (sec
->owner
)->csects
[rel
->r_symndx
];
2969 && (rsec
->flags
& SEC_MARK
) == 0)
2971 if (!xcoff_mark (info
, rsec
))
2976 /* See if this reloc needs to be copied into the .loader
2978 if (xcoff_need_ldrel_p (info
, rel
, h
))
2980 ++xcoff_hash_table (info
)->ldrel_count
;
2982 h
->flags
|= XCOFF_LDREL
;
2986 if (! info
->keep_memory
2987 && coff_section_data (sec
->owner
, sec
) != NULL
2988 && coff_section_data (sec
->owner
, sec
)->relocs
!= NULL
2989 && ! coff_section_data (sec
->owner
, sec
)->keep_relocs
)
2991 free (coff_section_data (sec
->owner
, sec
)->relocs
);
2992 coff_section_data (sec
->owner
, sec
)->relocs
= NULL
;
3000 /* Routines that are called after all the input files have been
3001 handled, but before the sections are laid out in memory. */
3003 /* The sweep phase of garbage collection. Remove all garbage
3007 xcoff_sweep (struct bfd_link_info
*info
)
3011 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3015 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3017 if ((o
->flags
& SEC_MARK
) == 0)
3019 /* Keep all sections from non-XCOFF input files. Keep
3020 special sections. Keep .debug sections for the
3022 if (sub
->xvec
!= info
->output_bfd
->xvec
3023 || o
== xcoff_hash_table (info
)->debug_section
3024 || o
== xcoff_hash_table (info
)->loader_section
3025 || o
== xcoff_hash_table (info
)->linkage_section
3026 || o
== xcoff_hash_table (info
)->descriptor_section
3027 || (bfd_section_flags (o
) & SEC_DEBUGGING
)
3028 || strcmp (o
->name
, ".debug") == 0)
3029 o
->flags
|= SEC_MARK
;
3040 /* Record the number of elements in a set. This is used to output the
3041 correct csect length. */
3044 bfd_xcoff_link_record_set (bfd
*output_bfd
,
3045 struct bfd_link_info
*info
,
3046 struct bfd_link_hash_entry
*harg
,
3049 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3050 struct xcoff_link_size_list
*n
;
3053 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3056 /* This will hardly ever be called. I don't want to burn four bytes
3057 per global symbol, so instead the size is kept on a linked list
3058 attached to the hash table. */
3060 n
= bfd_alloc (output_bfd
, amt
);
3063 n
->next
= xcoff_hash_table (info
)->size_list
;
3066 xcoff_hash_table (info
)->size_list
= n
;
3068 h
->flags
|= XCOFF_HAS_SIZE
;
3073 /* Import a symbol. */
3076 bfd_xcoff_import_symbol (bfd
*output_bfd
,
3077 struct bfd_link_info
*info
,
3078 struct bfd_link_hash_entry
*harg
,
3080 const char *imppath
,
3081 const char *impfile
,
3082 const char *impmember
,
3083 unsigned int syscall_flag
)
3085 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3087 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3090 /* A symbol name which starts with a period is the code for a
3091 function. If the symbol is undefined, then add an undefined
3092 symbol for the function descriptor, and import that instead. */
3093 if (h
->root
.root
.string
[0] == '.'
3094 && h
->root
.type
== bfd_link_hash_undefined
3095 && val
== (bfd_vma
) -1)
3097 struct xcoff_link_hash_entry
*hds
;
3099 hds
= h
->descriptor
;
3102 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3103 h
->root
.root
.string
+ 1,
3107 if (hds
->root
.type
== bfd_link_hash_new
)
3109 hds
->root
.type
= bfd_link_hash_undefined
;
3110 hds
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
3112 hds
->flags
|= XCOFF_DESCRIPTOR
;
3113 BFD_ASSERT ((h
->flags
& XCOFF_DESCRIPTOR
) == 0);
3114 hds
->descriptor
= h
;
3115 h
->descriptor
= hds
;
3118 /* Now, if the descriptor is undefined, import the descriptor
3119 rather than the symbol we were told to import. FIXME: Is
3120 this correct in all cases? */
3121 if (hds
->root
.type
== bfd_link_hash_undefined
)
3125 h
->flags
|= (XCOFF_IMPORT
| syscall_flag
);
3127 if (val
!= (bfd_vma
) -1)
3129 if (h
->root
.type
== bfd_link_hash_defined
3130 && (!bfd_is_abs_symbol (&h
->root
)
3131 || h
->root
.u
.def
.value
!= val
))
3132 (*info
->callbacks
->multiple_definition
) (info
, &h
->root
, output_bfd
,
3133 bfd_abs_section_ptr
, val
);
3135 h
->root
.type
= bfd_link_hash_defined
;
3136 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
3137 h
->root
.u
.def
.value
= val
;
3141 if (!xcoff_set_import_path (info
, h
, imppath
, impfile
, impmember
))
3147 /* Export a symbol. */
3150 bfd_xcoff_export_symbol (bfd
*output_bfd
,
3151 struct bfd_link_info
*info
,
3152 struct bfd_link_hash_entry
*harg
)
3154 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
3156 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3159 h
->flags
|= XCOFF_EXPORT
;
3161 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
3162 I'm just going to ignore it until somebody explains it. */
3164 /* Make sure we don't garbage collect this symbol. */
3165 if (! xcoff_mark_symbol (info
, h
))
3168 /* If this is a function descriptor, make sure we don't garbage
3169 collect the associated function code. We normally don't have to
3170 worry about this, because the descriptor will be attached to a
3171 section with relocs, but if we are creating the descriptor
3172 ourselves those relocs will not be visible to the mark code. */
3173 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3175 if (! xcoff_mark_symbol (info
, h
->descriptor
))
3182 /* Count a reloc against a symbol. This is called for relocs
3183 generated by the linker script, typically for global constructors
3187 bfd_xcoff_link_count_reloc (bfd
*output_bfd
,
3188 struct bfd_link_info
*info
,
3191 struct xcoff_link_hash_entry
*h
;
3193 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3196 h
= ((struct xcoff_link_hash_entry
*)
3197 bfd_wrapped_link_hash_lookup (output_bfd
, info
, name
, FALSE
, FALSE
,
3201 _bfd_error_handler (_("%s: no such symbol"), name
);
3202 bfd_set_error (bfd_error_no_symbols
);
3206 h
->flags
|= XCOFF_REF_REGULAR
;
3207 if (xcoff_hash_table (info
)->loader_section
)
3209 h
->flags
|= XCOFF_LDREL
;
3210 ++xcoff_hash_table (info
)->ldrel_count
;
3213 /* Mark the symbol to avoid garbage collection. */
3214 if (! xcoff_mark_symbol (info
, h
))
3220 /* This function is called for each symbol to which the linker script
3224 bfd_xcoff_record_link_assignment (bfd
*output_bfd
,
3225 struct bfd_link_info
*info
,
3228 struct xcoff_link_hash_entry
*h
;
3230 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3233 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, TRUE
, TRUE
,
3238 h
->flags
|= XCOFF_DEF_REGULAR
;
3243 /* An xcoff_link_hash_traverse callback for which DATA points to an
3244 xcoff_loader_info. Mark all symbols that should be automatically
3248 xcoff_mark_auto_exports (struct xcoff_link_hash_entry
*h
, void *data
)
3250 struct xcoff_loader_info
*ldinfo
;
3252 ldinfo
= (struct xcoff_loader_info
*) data
;
3253 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3255 if (!xcoff_mark_symbol (ldinfo
->info
, h
))
3256 ldinfo
->failed
= TRUE
;
3261 /* Add a symbol to the .loader symbols, if necessary. */
3263 /* INPUT_BFD has an external symbol associated with hash table entry H
3264 and csect CSECT. Return true if INPUT_BFD defines H. */
3267 xcoff_final_definition_p (bfd
*input_bfd
, struct xcoff_link_hash_entry
*h
,
3270 switch (h
->root
.type
)
3272 case bfd_link_hash_defined
:
3273 case bfd_link_hash_defweak
:
3274 /* No input bfd owns absolute symbols. They are written by
3275 xcoff_write_global_symbol instead. */
3276 return (!bfd_is_abs_section (csect
)
3277 && h
->root
.u
.def
.section
== csect
);
3279 case bfd_link_hash_common
:
3280 return h
->root
.u
.c
.p
->section
->owner
== input_bfd
;
3282 case bfd_link_hash_undefined
:
3283 case bfd_link_hash_undefweak
:
3284 /* We can't treat undef.abfd as the owner because that bfd
3285 might be a dynamic object. Allow any bfd to claim it. */
3293 /* See if H should have a loader symbol associated with it. */
3296 xcoff_build_ldsym (struct xcoff_loader_info
*ldinfo
,
3297 struct xcoff_link_hash_entry
*h
)
3301 /* Warn if this symbol is exported but not defined. */
3302 if ((h
->flags
& XCOFF_EXPORT
) != 0
3303 && (h
->flags
& XCOFF_WAS_UNDEFINED
) != 0)
3306 (_("warning: attempt to export undefined symbol `%s'"),
3307 h
->root
.root
.string
);
3311 /* We need to add a symbol to the .loader section if it is mentioned
3312 in a reloc which we are copying to the .loader section and it was
3313 not defined or common, or if it is the entry point, or if it is
3315 if (((h
->flags
& XCOFF_LDREL
) == 0
3316 || h
->root
.type
== bfd_link_hash_defined
3317 || h
->root
.type
== bfd_link_hash_defweak
3318 || h
->root
.type
== bfd_link_hash_common
)
3319 && (h
->flags
& XCOFF_ENTRY
) == 0
3320 && (h
->flags
& XCOFF_EXPORT
) == 0)
3323 /* We need to add this symbol to the .loader symbols. */
3325 BFD_ASSERT (h
->ldsym
== NULL
);
3326 amt
= sizeof (struct internal_ldsym
);
3327 h
->ldsym
= bfd_zalloc (ldinfo
->output_bfd
, amt
);
3328 if (h
->ldsym
== NULL
)
3330 ldinfo
->failed
= TRUE
;
3334 if ((h
->flags
& XCOFF_IMPORT
) != 0)
3336 /* Give imported descriptors class XMC_DS rather than XMC_UA. */
3337 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
3339 h
->ldsym
->l_ifile
= h
->ldindx
;
3342 /* The first 3 symbol table indices are reserved to indicate the
3343 data, text and bss sections. */
3344 h
->ldindx
= ldinfo
->ldsym_count
+ 3;
3346 ++ldinfo
->ldsym_count
;
3348 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
->output_bfd
, ldinfo
,
3349 h
->ldsym
, h
->root
.root
.string
))
3352 h
->flags
|= XCOFF_BUILT_LDSYM
;
3356 /* An xcoff_htab_traverse callback that is called for each symbol
3357 once garbage collection is complete. */
3360 xcoff_post_gc_symbol (struct xcoff_link_hash_entry
*h
, void * p
)
3362 struct xcoff_loader_info
*ldinfo
= (struct xcoff_loader_info
*) p
;
3364 /* __rtinit, this symbol has special handling. */
3365 if (h
->flags
& XCOFF_RTINIT
)
3368 /* We don't want to garbage collect symbols which are not defined in
3369 XCOFF files. This is a convenient place to mark them. */
3370 if (xcoff_hash_table (ldinfo
->info
)->gc
3371 && (h
->flags
& XCOFF_MARK
) == 0
3372 && (h
->root
.type
== bfd_link_hash_defined
3373 || h
->root
.type
== bfd_link_hash_defweak
)
3374 && (h
->root
.u
.def
.section
->owner
== NULL
3375 || (h
->root
.u
.def
.section
->owner
->xvec
3376 != ldinfo
->info
->output_bfd
->xvec
)))
3377 h
->flags
|= XCOFF_MARK
;
3379 /* Skip discarded symbols. */
3380 if (xcoff_hash_table (ldinfo
->info
)->gc
3381 && (h
->flags
& XCOFF_MARK
) == 0)
3384 /* If this is still a common symbol, and it wasn't garbage
3385 collected, we need to actually allocate space for it in the .bss
3387 if (h
->root
.type
== bfd_link_hash_common
3388 && h
->root
.u
.c
.p
->section
->size
== 0)
3390 BFD_ASSERT (bfd_is_com_section (h
->root
.u
.c
.p
->section
));
3391 h
->root
.u
.c
.p
->section
->size
= h
->root
.u
.c
.size
;
3394 if (xcoff_hash_table (ldinfo
->info
)->loader_section
)
3396 if (xcoff_auto_export_p (ldinfo
->info
, h
, ldinfo
->auto_export_flags
))
3397 h
->flags
|= XCOFF_EXPORT
;
3399 if (!xcoff_build_ldsym (ldinfo
, h
))
3406 /* INPUT_BFD includes XCOFF symbol ISYM, which is associated with linker
3407 hash table entry H and csect CSECT. AUX contains ISYM's auxillary
3408 csect information, if any. NAME is the function's name if the name
3409 is stored in the .debug section, otherwise it is null.
3411 Return 1 if we should include an appropriately-adjusted ISYM
3412 in the output file, 0 if we should discard ISYM, or -1 if an
3416 xcoff_keep_symbol_p (struct bfd_link_info
*info
, bfd
*input_bfd
,
3417 struct internal_syment
*isym
,
3418 union internal_auxent
*aux
,
3419 struct xcoff_link_hash_entry
*h
,
3420 asection
*csect
, const char *name
)
3424 /* If we are skipping this csect, we want to strip the symbol too. */
3428 /* Likewise if we garbage-collected the csect. */
3429 if (xcoff_hash_table (info
)->gc
3430 && !bfd_is_abs_section (csect
)
3431 && !bfd_is_und_section (csect
)
3432 && (csect
->flags
& SEC_MARK
) == 0)
3435 /* An XCOFF linker always removes C_STAT symbols. */
3436 if (isym
->n_sclass
== C_STAT
)
3439 /* We generate the TOC anchor separately. */
3440 if (isym
->n_sclass
== C_HIDEXT
3441 && aux
->x_csect
.x_smclas
== XMC_TC0
)
3444 /* If we are stripping all symbols, we want to discard this one. */
3445 if (info
->strip
== strip_all
)
3448 /* Discard symbols that are defined elsewhere. */
3449 if (EXTERN_SYM_P (isym
->n_sclass
))
3451 if ((h
->flags
& XCOFF_ALLOCATED
) != 0)
3453 if (!xcoff_final_definition_p (input_bfd
, h
, csect
))
3457 /* If we're discarding local symbols, check whether ISYM is local. */
3458 smtyp
= SMTYP_SMTYP (aux
->x_csect
.x_smtyp
);
3459 if (info
->discard
== discard_all
3460 && !EXTERN_SYM_P (isym
->n_sclass
)
3461 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
))
3464 /* If we're stripping debugging symbols, check whether ISYM is one. */
3465 if (info
->strip
== strip_debugger
3466 && isym
->n_scnum
== N_DEBUG
)
3469 /* If we are stripping symbols based on name, check how ISYM's
3470 name should be handled. */
3471 if (info
->strip
== strip_some
3472 || info
->discard
== discard_l
)
3474 char buf
[SYMNMLEN
+ 1];
3478 name
= _bfd_coff_internal_syment_name (input_bfd
, isym
, buf
);
3483 if (info
->strip
== strip_some
3484 && bfd_hash_lookup (info
->keep_hash
, name
, FALSE
, FALSE
) == NULL
)
3487 if (info
->discard
== discard_l
3488 && !EXTERN_SYM_P (isym
->n_sclass
)
3489 && (isym
->n_sclass
!= C_HIDEXT
|| smtyp
!= XTY_SD
)
3490 && bfd_is_local_label_name (input_bfd
, name
))
3497 /* Lay out the .loader section, filling in the header and the import paths.
3498 LIBPATH is as for bfd_xcoff_size_dynamic_sections. */
3501 xcoff_build_loader_section (struct xcoff_loader_info
*ldinfo
,
3502 const char *libpath
)
3505 struct xcoff_link_hash_table
*htab
;
3506 struct internal_ldhdr
*ldhdr
;
3507 struct xcoff_import_file
*fl
;
3508 bfd_size_type stoff
;
3509 size_t impsize
, impcount
;
3513 /* Work out the size of the import file names. Each import file ID
3514 consists of three null terminated strings: the path, the file
3515 name, and the archive member name. The first entry in the list
3516 of names is the path to use to find objects, which the linker has
3517 passed in as the libpath argument. For some reason, the path
3518 entry in the other import file names appears to always be empty. */
3519 output_bfd
= ldinfo
->output_bfd
;
3520 htab
= xcoff_hash_table (ldinfo
->info
);
3521 impsize
= strlen (libpath
) + 3;
3523 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3526 impsize
+= (strlen (fl
->path
)
3528 + strlen (fl
->member
)
3532 /* Set up the .loader section header. */
3533 ldhdr
= &htab
->ldhdr
;
3534 ldhdr
->l_version
= bfd_xcoff_ldhdr_version(output_bfd
);
3535 ldhdr
->l_nsyms
= ldinfo
->ldsym_count
;
3536 ldhdr
->l_nreloc
= htab
->ldrel_count
;
3537 ldhdr
->l_istlen
= impsize
;
3538 ldhdr
->l_nimpid
= impcount
;
3539 ldhdr
->l_impoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3540 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
)
3541 + ldhdr
->l_nreloc
* bfd_xcoff_ldrelsz (output_bfd
));
3542 ldhdr
->l_stlen
= ldinfo
->string_size
;
3543 stoff
= ldhdr
->l_impoff
+ impsize
;
3544 if (ldinfo
->string_size
== 0)
3547 ldhdr
->l_stoff
= stoff
;
3549 /* 64 bit elements to ldhdr
3550 The swap out routine for 32 bit will ignore them.
3551 Nothing fancy, symbols come after the header and relocs come
3553 ldhdr
->l_symoff
= bfd_xcoff_ldhdrsz (output_bfd
);
3554 ldhdr
->l_rldoff
= (bfd_xcoff_ldhdrsz (output_bfd
)
3555 + ldhdr
->l_nsyms
* bfd_xcoff_ldsymsz (output_bfd
));
3557 /* We now know the final size of the .loader section. Allocate
3559 lsec
= htab
->loader_section
;
3560 lsec
->size
= stoff
+ ldhdr
->l_stlen
;
3561 lsec
->contents
= bfd_zalloc (output_bfd
, lsec
->size
);
3562 if (lsec
->contents
== NULL
)
3565 /* Set up the header. */
3566 bfd_xcoff_swap_ldhdr_out (output_bfd
, ldhdr
, lsec
->contents
);
3568 /* Set up the import file names. */
3569 out
= (char *) lsec
->contents
+ ldhdr
->l_impoff
;
3570 strcpy (out
, libpath
);
3571 out
+= strlen (libpath
) + 1;
3574 for (fl
= htab
->imports
; fl
!= NULL
; fl
= fl
->next
)
3579 while ((*out
++ = *s
++) != '\0')
3582 while ((*out
++ = *s
++) != '\0')
3585 while ((*out
++ = *s
++) != '\0')
3589 BFD_ASSERT ((bfd_size_type
) ((bfd_byte
*) out
- lsec
->contents
) == stoff
);
3591 /* Set up the symbol string table. */
3592 if (ldinfo
->string_size
> 0)
3594 memcpy (out
, ldinfo
->strings
, ldinfo
->string_size
);
3595 free (ldinfo
->strings
);
3596 ldinfo
->strings
= NULL
;
3599 /* We can't set up the symbol table or the relocs yet, because we
3600 don't yet know the final position of the various sections. The
3601 .loader symbols are written out when the corresponding normal
3602 symbols are written out in xcoff_link_input_bfd or
3603 xcoff_write_global_symbol. The .loader relocs are written out
3604 when the corresponding normal relocs are handled in
3605 xcoff_link_input_bfd. */
3610 /* Build the .loader section. This is called by the XCOFF linker
3611 emulation before_allocation routine. We must set the size of the
3612 .loader section before the linker lays out the output file.
3613 LIBPATH is the library path to search for shared objects; this is
3614 normally built from the -L arguments passed to the linker. ENTRY
3615 is the name of the entry point symbol (the -e linker option).
3616 FILE_ALIGN is the alignment to use for sections within the file
3617 (the -H linker option). MAXSTACK is the maximum stack size (the
3618 -bmaxstack linker option). MAXDATA is the maximum data size (the
3619 -bmaxdata linker option). GC is whether to do garbage collection
3620 (the -bgc linker option). MODTYPE is the module type (the
3621 -bmodtype linker option). TEXTRO is whether the text section must
3622 be read only (the -btextro linker option). AUTO_EXPORT_FLAGS
3623 is a mask of XCOFF_EXPALL and XCOFF_EXPFULL. SPECIAL_SECTIONS
3624 is set by this routine to csects with magic names like _end. */
3627 bfd_xcoff_size_dynamic_sections (bfd
*output_bfd
,
3628 struct bfd_link_info
*info
,
3629 const char *libpath
,
3631 unsigned long file_align
,
3632 unsigned long maxstack
,
3633 unsigned long maxdata
,
3637 unsigned int auto_export_flags
,
3638 asection
**special_sections
,
3641 struct xcoff_loader_info ldinfo
;
3645 struct bfd_strtab_hash
*debug_strtab
;
3646 bfd_byte
*debug_contents
= NULL
;
3649 if (bfd_get_flavour (output_bfd
) != bfd_target_xcoff_flavour
)
3651 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3652 special_sections
[i
] = NULL
;
3656 ldinfo
.failed
= FALSE
;
3657 ldinfo
.output_bfd
= output_bfd
;
3659 ldinfo
.auto_export_flags
= auto_export_flags
;
3660 ldinfo
.ldsym_count
= 0;
3661 ldinfo
.string_size
= 0;
3662 ldinfo
.strings
= NULL
;
3663 ldinfo
.string_alc
= 0;
3665 xcoff_data (output_bfd
)->maxstack
= maxstack
;
3666 xcoff_data (output_bfd
)->maxdata
= maxdata
;
3667 xcoff_data (output_bfd
)->modtype
= modtype
;
3669 xcoff_hash_table (info
)->file_align
= file_align
;
3670 xcoff_hash_table (info
)->textro
= textro
;
3671 xcoff_hash_table (info
)->rtld
= rtld
;
3674 if (xcoff_hash_table (info
)->loader_section
3675 && (info
->init_function
|| info
->fini_function
|| rtld
))
3677 struct xcoff_link_hash_entry
*hsym
;
3678 struct internal_ldsym
*ldsym
;
3680 hsym
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
3681 "__rtinit", FALSE
, FALSE
, TRUE
);
3685 (_("error: undefined symbol __rtinit"));
3689 xcoff_mark_symbol (info
, hsym
);
3690 hsym
->flags
|= (XCOFF_DEF_REGULAR
| XCOFF_RTINIT
);
3692 /* __rtinit initialized. */
3693 amt
= sizeof (* ldsym
);
3694 ldsym
= bfd_malloc (amt
);
3696 ldsym
->l_value
= 0; /* Will be filled in later. */
3697 ldsym
->l_scnum
= 2; /* Data section. */
3698 ldsym
->l_smtype
= XTY_SD
; /* Csect section definition. */
3699 ldsym
->l_smclas
= 5; /* .rw. */
3700 ldsym
->l_ifile
= 0; /* Special system loader symbol. */
3701 ldsym
->l_parm
= 0; /* NA. */
3703 /* Force __rtinit to be the first symbol in the loader symbol table
3704 See xcoff_build_ldsyms
3706 The first 3 symbol table indices are reserved to indicate the data,
3707 text and bss sections. */
3708 BFD_ASSERT (0 == ldinfo
.ldsym_count
);
3711 ldinfo
.ldsym_count
= 1;
3712 hsym
->ldsym
= ldsym
;
3714 if (! bfd_xcoff_put_ldsymbol_name (ldinfo
.output_bfd
, &ldinfo
,
3715 hsym
->ldsym
, hsym
->root
.root
.string
))
3718 /* This symbol is written out by xcoff_write_global_symbol
3719 Set stuff up so xcoff_write_global_symbol logic works. */
3720 hsym
->flags
|= XCOFF_DEF_REGULAR
| XCOFF_MARK
;
3721 hsym
->root
.type
= bfd_link_hash_defined
;
3722 hsym
->root
.u
.def
.value
= 0;
3725 /* Garbage collect unused sections. */
3726 if (bfd_link_relocatable (info
) || !gc
)
3729 xcoff_hash_table (info
)->gc
= FALSE
;
3731 /* We still need to call xcoff_mark, in order to set ldrel_count
3733 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3737 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3739 /* We shouldn't unconditionaly mark the TOC section.
3740 The output file should only have a TOC if either
3741 (a) one of the input files did or (b) we end up
3742 creating TOC references as part of the link process. */
3743 if (o
!= xcoff_hash_table (info
)->toc_section
3744 && (o
->flags
& SEC_MARK
) == 0)
3746 if (! xcoff_mark (info
, o
))
3755 && !xcoff_mark_symbol_by_name (info
, entry
, XCOFF_ENTRY
))
3757 if (info
->init_function
!= NULL
3758 && !xcoff_mark_symbol_by_name (info
, info
->init_function
, 0))
3760 if (info
->fini_function
!= NULL
3761 && !xcoff_mark_symbol_by_name (info
, info
->fini_function
, 0))
3763 if (auto_export_flags
!= 0)
3765 xcoff_link_hash_traverse (xcoff_hash_table (info
),
3766 xcoff_mark_auto_exports
, &ldinfo
);
3771 xcoff_hash_table (info
)->gc
= TRUE
;
3774 /* Return special sections to the caller. */
3775 for (i
= 0; i
< XCOFF_NUMBER_OF_SPECIAL_SECTIONS
; i
++)
3777 sec
= xcoff_hash_table (info
)->special_sections
[i
];
3781 && (sec
->flags
& SEC_MARK
) == 0)
3784 special_sections
[i
] = sec
;
3787 if (info
->input_bfds
== NULL
)
3788 /* I'm not sure what to do in this bizarre case. */
3791 xcoff_link_hash_traverse (xcoff_hash_table (info
), xcoff_post_gc_symbol
,
3796 if (xcoff_hash_table (info
)->loader_section
3797 && !xcoff_build_loader_section (&ldinfo
, libpath
))
3800 /* Allocate space for the magic sections. */
3801 sec
= xcoff_hash_table (info
)->linkage_section
;
3804 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3805 if (sec
->contents
== NULL
)
3808 sec
= xcoff_hash_table (info
)->toc_section
;
3811 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3812 if (sec
->contents
== NULL
)
3815 sec
= xcoff_hash_table (info
)->descriptor_section
;
3818 sec
->contents
= bfd_zalloc (output_bfd
, sec
->size
);
3819 if (sec
->contents
== NULL
)
3823 /* Now that we've done garbage collection, decide which symbols to keep,
3824 and figure out the contents of the .debug section. */
3825 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
3827 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
3830 bfd_size_type symcount
;
3833 unsigned int *lineno_counts
;
3834 struct xcoff_link_hash_entry
**sym_hash
;
3835 bfd_byte
*esym
, *esymend
;
3836 bfd_size_type symesz
;
3838 if (sub
->xvec
!= info
->output_bfd
->xvec
)
3841 if ((sub
->flags
& DYNAMIC
) != 0
3842 && !info
->static_link
)
3845 if (! _bfd_coff_get_external_symbols (sub
))
3848 symcount
= obj_raw_syment_count (sub
);
3849 debug_index
= bfd_zalloc (sub
, symcount
* sizeof (long));
3850 if (debug_index
== NULL
)
3852 xcoff_data (sub
)->debug_indices
= debug_index
;
3854 if (info
->strip
== strip_all
3855 || info
->strip
== strip_debugger
3856 || info
->discard
== discard_all
)
3857 /* We're stripping all debugging information, so there's no need
3858 to read SUB's .debug section. */
3862 /* Grab the contents of SUB's .debug section, if any. */
3863 subdeb
= bfd_get_section_by_name (sub
, ".debug");
3864 if (subdeb
!= NULL
&& subdeb
->size
> 0)
3866 /* We use malloc and copy the names into the debug
3867 stringtab, rather than bfd_alloc, because I expect
3868 that, when linking many files together, many of the
3869 strings will be the same. Storing the strings in the
3870 hash table should save space in this case. */
3871 if (!bfd_malloc_and_get_section (sub
, subdeb
, &debug_contents
))
3876 csectpp
= xcoff_data (sub
)->csects
;
3877 lineno_counts
= xcoff_data (sub
)->lineno_counts
;
3878 sym_hash
= obj_xcoff_sym_hashes (sub
);
3879 symesz
= bfd_coff_symesz (sub
);
3880 esym
= (bfd_byte
*) obj_coff_external_syms (sub
);
3881 esymend
= esym
+ symcount
* symesz
;
3883 while (esym
< esymend
)
3885 struct internal_syment sym
;
3886 union internal_auxent aux
;
3891 bfd_coff_swap_sym_in (sub
, esym
, &sym
);
3893 /* Read in the csect information, if any. */
3894 if (CSECT_SYM_P (sym
.n_sclass
))
3896 BFD_ASSERT (sym
.n_numaux
> 0);
3897 bfd_coff_swap_aux_in (sub
, esym
+ symesz
* sym
.n_numaux
,
3898 sym
.n_type
, sym
.n_sclass
,
3899 sym
.n_numaux
- 1, sym
.n_numaux
, &aux
);
3902 /* If this symbol's name is stored in the debug section,
3903 get a pointer to it. */
3904 if (debug_contents
!= NULL
3905 && sym
._n
._n_n
._n_zeroes
== 0
3906 && bfd_coff_symname_in_debug (sub
, &sym
))
3907 name
= (const char *) debug_contents
+ sym
._n
._n_n
._n_offset
;
3911 /* Decide whether to copy this symbol to the output file. */
3913 keep_p
= xcoff_keep_symbol_p (info
, sub
, &sym
, &aux
,
3914 *sym_hash
, csect
, name
);
3919 /* Use a debug_index of -2 to record that a symbol should
3924 /* See whether we should store the symbol name in the
3925 output .debug section. */
3930 indx
= _bfd_stringtab_add (debug_strtab
, name
, TRUE
, TRUE
);
3931 if (indx
== (bfd_size_type
) -1)
3933 *debug_index
= indx
;
3938 (*sym_hash
)->flags
|= XCOFF_ALLOCATED
;
3939 if (*lineno_counts
> 0)
3940 csect
->output_section
->lineno_count
+= *lineno_counts
;
3943 esym
+= (sym
.n_numaux
+ 1) * symesz
;
3944 csectpp
+= sym
.n_numaux
+ 1;
3945 sym_hash
+= sym
.n_numaux
+ 1;
3946 lineno_counts
+= sym
.n_numaux
+ 1;
3947 debug_index
+= sym
.n_numaux
+ 1;
3952 free (debug_contents
);
3953 debug_contents
= NULL
;
3955 /* Clear the size of subdeb, so that it is not included directly
3956 in the output file. */
3960 if (! info
->keep_memory
)
3962 if (! _bfd_coff_free_symbols (sub
))
3967 if (info
->strip
!= strip_all
)
3968 xcoff_hash_table (info
)->debug_section
->size
=
3969 _bfd_stringtab_size (debug_strtab
);
3974 if (ldinfo
.strings
!= NULL
)
3975 free (ldinfo
.strings
);
3976 if (debug_contents
!= NULL
)
3977 free (debug_contents
);
3982 bfd_xcoff_link_generate_rtinit (bfd
*abfd
,
3987 struct bfd_in_memory
*bim
;
3989 bim
= bfd_malloc ((bfd_size_type
) sizeof (* bim
));
3996 abfd
->link
.next
= 0;
3997 abfd
->format
= bfd_object
;
3998 abfd
->iostream
= (void *) bim
;
3999 abfd
->flags
= BFD_IN_MEMORY
;
4000 abfd
->iovec
= &_bfd_memory_iovec
;
4001 abfd
->direction
= write_direction
;
4005 if (! bfd_xcoff_generate_rtinit (abfd
, init
, fini
, rtld
))
4008 /* need to reset to unknown or it will not be read back in correctly */
4009 abfd
->format
= bfd_unknown
;
4010 abfd
->direction
= read_direction
;
4016 /* Return the section that defines H. Return null if no section does. */
4019 xcoff_symbol_section (struct xcoff_link_hash_entry
*h
)
4021 switch (h
->root
.type
)
4023 case bfd_link_hash_defined
:
4024 case bfd_link_hash_defweak
:
4025 return h
->root
.u
.def
.section
;
4027 case bfd_link_hash_common
:
4028 return h
->root
.u
.c
.p
->section
;
4035 /* Add a .loader relocation for input relocation IREL. If the loader
4036 relocation should be against an output section, HSEC points to the
4037 input section that IREL is against, otherwise HSEC is null. H is the
4038 symbol that IREL is against, or null if it isn't against a global symbol.
4039 REFERENCE_BFD is the bfd to use in error messages about the relocation. */
4042 xcoff_create_ldrel (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
,
4043 asection
*output_section
, bfd
*reference_bfd
,
4044 struct internal_reloc
*irel
, asection
*hsec
,
4045 struct xcoff_link_hash_entry
*h
)
4047 struct internal_ldrel ldrel
;
4049 ldrel
.l_vaddr
= irel
->r_vaddr
;
4052 const char *secname
;
4054 secname
= hsec
->output_section
->name
;
4055 if (strcmp (secname
, ".text") == 0)
4057 else if (strcmp (secname
, ".data") == 0)
4059 else if (strcmp (secname
, ".bss") == 0)
4064 /* xgettext:c-format */
4065 (_("%pB: loader reloc in unrecognized section `%s'"),
4066 reference_bfd
, secname
);
4067 bfd_set_error (bfd_error_nonrepresentable_section
);
4076 /* xgettext:c-format */
4077 (_("%pB: `%s' in loader reloc but not loader sym"),
4078 reference_bfd
, h
->root
.root
.string
);
4079 bfd_set_error (bfd_error_bad_value
);
4082 ldrel
.l_symndx
= h
->ldindx
;
4085 ldrel
.l_symndx
= -(bfd_size_type
) 1;
4087 ldrel
.l_rtype
= (irel
->r_size
<< 8) | irel
->r_type
;
4088 ldrel
.l_rsecnm
= output_section
->target_index
;
4089 if (xcoff_hash_table (flinfo
->info
)->textro
4090 && strcmp (output_section
->name
, ".text") == 0)
4093 /* xgettext:c-format */
4094 (_("%pB: loader reloc in read-only section %pA"),
4095 reference_bfd
, output_section
);
4096 bfd_set_error (bfd_error_invalid_operation
);
4099 bfd_xcoff_swap_ldrel_out (output_bfd
, &ldrel
, flinfo
->ldrel
);
4100 flinfo
->ldrel
+= bfd_xcoff_ldrelsz (output_bfd
);
4104 /* Link an input file into the linker output file. This function
4105 handles all the sections and relocations of the input file at once. */
4108 xcoff_link_input_bfd (struct xcoff_final_link_info
*flinfo
,
4112 const char *strings
;
4113 bfd_size_type syment_base
;
4114 unsigned int n_tmask
;
4115 unsigned int n_btshft
;
4116 bfd_boolean copy
, hash
;
4117 bfd_size_type isymesz
;
4118 bfd_size_type osymesz
;
4119 bfd_size_type linesz
;
4122 struct xcoff_link_hash_entry
**sym_hash
;
4123 struct internal_syment
*isymp
;
4125 unsigned int *lineno_counts
;
4128 unsigned long output_index
;
4132 bfd_boolean keep_syms
;
4135 /* We can just skip DYNAMIC files, unless this is a static link. */
4136 if ((input_bfd
->flags
& DYNAMIC
) != 0
4137 && ! flinfo
->info
->static_link
)
4140 /* Move all the symbols to the output file. */
4141 output_bfd
= flinfo
->output_bfd
;
4143 syment_base
= obj_raw_syment_count (output_bfd
);
4144 isymesz
= bfd_coff_symesz (input_bfd
);
4145 osymesz
= bfd_coff_symesz (output_bfd
);
4146 linesz
= bfd_coff_linesz (input_bfd
);
4147 BFD_ASSERT (linesz
== bfd_coff_linesz (output_bfd
));
4149 n_tmask
= coff_data (input_bfd
)->local_n_tmask
;
4150 n_btshft
= coff_data (input_bfd
)->local_n_btshft
;
4152 /* Define macros so that ISFCN, et. al., macros work correctly. */
4153 #define N_TMASK n_tmask
4154 #define N_BTSHFT n_btshft
4157 if (! flinfo
->info
->keep_memory
)
4160 if (flinfo
->info
->traditional_format
)
4163 if (! _bfd_coff_get_external_symbols (input_bfd
))
4166 /* Make one pass over the symbols and assign indices to symbols that
4167 we have decided to keep. Also use create .loader symbol information
4168 and update information in hash table entries. */
4169 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4170 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4171 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4172 csectpp
= xcoff_data (input_bfd
)->csects
;
4173 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4174 isymp
= flinfo
->internal_syms
;
4175 indexp
= flinfo
->sym_indices
;
4176 output_index
= syment_base
;
4177 while (esym
< esym_end
)
4179 union internal_auxent aux
;
4183 bfd_coff_swap_sym_in (input_bfd
, (void *) esym
, (void *) isymp
);
4185 /* Read in the csect information, if any. */
4186 if (CSECT_SYM_P (isymp
->n_sclass
))
4188 BFD_ASSERT (isymp
->n_numaux
> 0);
4189 bfd_coff_swap_aux_in (input_bfd
,
4190 (void *) (esym
+ isymesz
* isymp
->n_numaux
),
4191 isymp
->n_type
, isymp
->n_sclass
,
4192 isymp
->n_numaux
- 1, isymp
->n_numaux
,
4195 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
4198 /* If this symbol is in the .loader section, swap out the
4199 .loader symbol information. If this is an external symbol
4200 reference to a defined symbol, though, then wait until we get
4201 to the definition. */
4202 if (EXTERN_SYM_P (isymp
->n_sclass
)
4203 && *sym_hash
!= NULL
4204 && (*sym_hash
)->ldsym
!= NULL
4205 && xcoff_final_definition_p (input_bfd
, *sym_hash
, *csectpp
))
4207 struct xcoff_link_hash_entry
*h
;
4208 struct internal_ldsym
*ldsym
;
4212 if (isymp
->n_scnum
> 0)
4214 ldsym
->l_scnum
= (*csectpp
)->output_section
->target_index
;
4215 ldsym
->l_value
= (isymp
->n_value
4216 + (*csectpp
)->output_section
->vma
4217 + (*csectpp
)->output_offset
4222 ldsym
->l_scnum
= isymp
->n_scnum
;
4223 ldsym
->l_value
= isymp
->n_value
;
4226 ldsym
->l_smtype
= smtyp
;
4227 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
4228 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4229 || (h
->flags
& XCOFF_IMPORT
) != 0)
4230 ldsym
->l_smtype
|= L_IMPORT
;
4231 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
4232 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4233 || (h
->flags
& XCOFF_EXPORT
) != 0)
4234 ldsym
->l_smtype
|= L_EXPORT
;
4235 if ((h
->flags
& XCOFF_ENTRY
) != 0)
4236 ldsym
->l_smtype
|= L_ENTRY
;
4237 if (isymp
->n_sclass
== C_AIX_WEAKEXT
)
4238 ldsym
->l_smtype
|= L_WEAK
;
4240 ldsym
->l_smclas
= aux
.x_csect
.x_smclas
;
4242 if (ldsym
->l_ifile
== (bfd_size_type
) -1)
4244 else if (ldsym
->l_ifile
== 0)
4246 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
4252 if (h
->root
.type
== bfd_link_hash_defined
4253 || h
->root
.type
== bfd_link_hash_defweak
)
4254 impbfd
= h
->root
.u
.def
.section
->owner
;
4255 else if (h
->root
.type
== bfd_link_hash_undefined
4256 || h
->root
.type
== bfd_link_hash_undefweak
)
4257 impbfd
= h
->root
.u
.undef
.abfd
;
4265 BFD_ASSERT (impbfd
->xvec
== flinfo
->output_bfd
->xvec
);
4266 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
4273 BFD_ASSERT (h
->ldindx
>= 0);
4274 bfd_xcoff_swap_ldsym_out (flinfo
->output_bfd
, ldsym
,
4277 * bfd_xcoff_ldsymsz (flinfo
->output_bfd
))));
4280 /* Fill in snentry now that we know the target_index. */
4281 if ((h
->flags
& XCOFF_ENTRY
) != 0
4282 && (h
->root
.type
== bfd_link_hash_defined
4283 || h
->root
.type
== bfd_link_hash_defweak
))
4285 xcoff_data (output_bfd
)->snentry
=
4286 h
->root
.u
.def
.section
->output_section
->target_index
;
4290 add
= 1 + isymp
->n_numaux
;
4292 if (*debug_index
== -2)
4293 /* We've decided to strip this symbol. */
4297 /* Assign the next unused index to this symbol. */
4298 *indexp
= output_index
;
4300 if (EXTERN_SYM_P (isymp
->n_sclass
))
4302 BFD_ASSERT (*sym_hash
!= NULL
);
4303 (*sym_hash
)->indx
= output_index
;
4306 /* If this is a symbol in the TOC which we may have merged
4307 (class XMC_TC), remember the symbol index of the TOC
4309 if (isymp
->n_sclass
== C_HIDEXT
4310 && aux
.x_csect
.x_smclas
== XMC_TC
4311 && *sym_hash
!= NULL
)
4313 BFD_ASSERT (((*sym_hash
)->flags
& XCOFF_SET_TOC
) == 0);
4314 BFD_ASSERT ((*sym_hash
)->toc_section
!= NULL
);
4315 (*sym_hash
)->u
.toc_indx
= output_index
;
4318 output_index
+= add
;
4321 esym
+= add
* isymesz
;
4327 for (--add
; add
> 0; --add
)
4331 /* Now write out the symbols that we decided to keep. */
4333 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4334 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4335 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
4336 isymp
= flinfo
->internal_syms
;
4337 indexp
= flinfo
->sym_indices
;
4338 csectpp
= xcoff_data (input_bfd
)->csects
;
4339 lineno_counts
= xcoff_data (input_bfd
)->lineno_counts
;
4340 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
4341 outsym
= flinfo
->outsyms
;
4344 while (esym
< esym_end
)
4348 add
= 1 + isymp
->n_numaux
;
4351 esym
+= add
* isymesz
;
4354 struct internal_syment isym
;
4357 /* Adjust the symbol in order to output it. */
4359 if (isym
._n
._n_n
._n_zeroes
== 0
4360 && isym
._n
._n_n
._n_offset
!= 0)
4362 /* This symbol has a long name. Enter it in the string
4363 table we are building. If *debug_index != -1, the
4364 name has already been entered in the .debug section. */
4365 if (*debug_index
>= 0)
4366 isym
._n
._n_n
._n_offset
= *debug_index
;
4372 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, NULL
);
4376 indx
= _bfd_stringtab_add (flinfo
->strtab
, name
, hash
, copy
);
4377 if (indx
== (bfd_size_type
) -1)
4379 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
4383 /* Make __rtinit C_HIDEXT rather than C_EXT. This avoids
4384 multiple definition problems when linking a shared object
4385 statically. (The native linker doesn't enter __rtinit into
4386 the normal table at all, but having a local symbol can make
4387 the objdump output easier to read.) */
4388 if (isym
.n_sclass
== C_EXT
4390 && ((*sym_hash
)->flags
& XCOFF_RTINIT
) != 0)
4391 isym
.n_sclass
= C_HIDEXT
;
4393 /* The value of a C_FILE symbol is the symbol index of the
4394 next C_FILE symbol. The value of the last C_FILE symbol
4395 is -1. We try to get this right, below, just before we
4396 write the symbols out, but in the general case we may
4397 have to write the symbol out twice. */
4398 if (isym
.n_sclass
== C_FILE
)
4400 if (flinfo
->last_file_index
!= -1
4401 && flinfo
->last_file
.n_value
!= (bfd_vma
) *indexp
)
4403 /* We must correct the value of the last C_FILE entry. */
4404 flinfo
->last_file
.n_value
= *indexp
;
4405 if ((bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4407 /* The last C_FILE symbol is in this input file. */
4408 bfd_coff_swap_sym_out (output_bfd
,
4409 (void *) &flinfo
->last_file
,
4410 (void *) (flinfo
->outsyms
4411 + ((flinfo
->last_file_index
4417 /* We have already written out the last C_FILE
4418 symbol. We need to write it out again. We
4419 borrow *outsym temporarily. */
4422 bfd_coff_swap_sym_out (output_bfd
,
4423 (void *) &flinfo
->last_file
,
4426 pos
= obj_sym_filepos (output_bfd
);
4427 pos
+= flinfo
->last_file_index
* osymesz
;
4428 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4429 || (bfd_bwrite (outsym
, osymesz
, output_bfd
)
4435 flinfo
->last_file_index
= *indexp
;
4436 flinfo
->last_file
= isym
;
4439 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4440 into the line numbers. We update the symbol values when
4441 we handle the line numbers. */
4442 if (isym
.n_sclass
== C_BINCL
4443 || isym
.n_sclass
== C_EINCL
)
4445 isym
.n_value
= flinfo
->line_filepos
;
4448 /* The value of a C_BSTAT symbol is the symbol table
4449 index of the containing csect. */
4450 else if (isym
.n_sclass
== C_BSTAT
)
4454 indx
= isym
.n_value
;
4455 if (indx
< obj_raw_syment_count (input_bfd
))
4459 symindx
= flinfo
->sym_indices
[indx
];
4463 isym
.n_value
= symindx
;
4466 else if (isym
.n_sclass
!= C_ESTAT
4467 && isym
.n_sclass
!= C_DECL
4468 && isym
.n_scnum
> 0)
4470 isym
.n_scnum
= (*csectpp
)->output_section
->target_index
;
4471 isym
.n_value
+= ((*csectpp
)->output_section
->vma
4472 + (*csectpp
)->output_offset
4476 /* Output the symbol. */
4477 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
4482 for (i
= 0; i
< isymp
->n_numaux
&& esym
< esym_end
; i
++)
4484 union internal_auxent aux
;
4486 bfd_coff_swap_aux_in (input_bfd
, (void *) esym
, isymp
->n_type
,
4487 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4490 if (isymp
->n_sclass
== C_FILE
)
4492 /* This is the file name (or some comment put in by
4493 the compiler). If it is long, we must put it in
4494 the string table. */
4495 if (aux
.x_file
.x_n
.x_zeroes
== 0
4496 && aux
.x_file
.x_n
.x_offset
!= 0)
4498 const char *filename
;
4501 BFD_ASSERT (aux
.x_file
.x_n
.x_offset
4502 >= STRING_SIZE_SIZE
);
4503 if (strings
== NULL
)
4505 strings
= _bfd_coff_read_string_table (input_bfd
);
4506 if (strings
== NULL
)
4509 if ((bfd_size_type
) aux
.x_file
.x_n
.x_offset
>= obj_coff_strings_len (input_bfd
))
4510 filename
= _("<corrupt>");
4512 filename
= strings
+ aux
.x_file
.x_n
.x_offset
;
4513 indx
= _bfd_stringtab_add (flinfo
->strtab
, filename
,
4515 if (indx
== (bfd_size_type
) -1)
4517 aux
.x_file
.x_n
.x_offset
= STRING_SIZE_SIZE
+ indx
;
4520 else if (CSECT_SYM_P (isymp
->n_sclass
)
4521 && i
+ 1 == isymp
->n_numaux
)
4524 /* We don't support type checking. I don't know if
4526 aux
.x_csect
.x_parmhash
= 0;
4527 /* I don't think anybody uses these fields, but we'd
4528 better clobber them just in case. */
4529 aux
.x_csect
.x_stab
= 0;
4530 aux
.x_csect
.x_snstab
= 0;
4532 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_LD
)
4536 indx
= aux
.x_csect
.x_scnlen
.l
;
4537 if (indx
< obj_raw_syment_count (input_bfd
))
4541 symindx
= flinfo
->sym_indices
[indx
];
4544 aux
.x_csect
.x_scnlen
.l
= 0;
4548 aux
.x_csect
.x_scnlen
.l
= symindx
;
4553 else if (isymp
->n_sclass
!= C_STAT
|| isymp
->n_type
!= T_NULL
)
4557 if (ISFCN (isymp
->n_type
)
4558 || ISTAG (isymp
->n_sclass
)
4559 || isymp
->n_sclass
== C_BLOCK
4560 || isymp
->n_sclass
== C_FCN
)
4562 indx
= aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
;
4564 && indx
< obj_raw_syment_count (input_bfd
))
4566 /* We look forward through the symbol for
4567 the index of the next symbol we are going
4568 to include. I don't know if this is
4570 while (flinfo
->sym_indices
[indx
] < 0
4571 && indx
< obj_raw_syment_count (input_bfd
))
4573 if (indx
>= obj_raw_syment_count (input_bfd
))
4574 indx
= output_index
;
4576 indx
= flinfo
->sym_indices
[indx
];
4577 aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
= indx
;
4582 indx
= aux
.x_sym
.x_tagndx
.l
;
4583 if (indx
> 0 && indx
< obj_raw_syment_count (input_bfd
))
4587 symindx
= flinfo
->sym_indices
[indx
];
4589 aux
.x_sym
.x_tagndx
.l
= 0;
4591 aux
.x_sym
.x_tagndx
.l
= symindx
;
4596 /* Copy over the line numbers, unless we are stripping
4597 them. We do this on a symbol by symbol basis in
4598 order to more easily handle garbage collection. */
4599 if (CSECT_SYM_P (isymp
->n_sclass
)
4601 && isymp
->n_numaux
> 1
4602 && ISFCN (isymp
->n_type
)
4603 && aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
4605 if (*lineno_counts
== 0)
4606 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= 0;
4609 asection
*enclosing
;
4610 unsigned int enc_count
;
4611 bfd_signed_vma linoff
;
4612 struct internal_lineno lin
;
4619 /* Read in the enclosing section's line-number
4620 information, if we haven't already. */
4622 enclosing
= xcoff_section_data (abfd
, o
)->enclosing
;
4623 enc_count
= xcoff_section_data (abfd
, o
)->lineno_count
;
4624 if (oline
!= enclosing
)
4626 pos
= enclosing
->line_filepos
;
4627 amt
= linesz
* enc_count
;
4628 if (bfd_seek (input_bfd
, pos
, SEEK_SET
) != 0
4629 || (bfd_bread (flinfo
->linenos
, amt
, input_bfd
)
4635 /* Copy across the first entry, adjusting its
4637 linoff
= (aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
4638 - enclosing
->line_filepos
);
4639 linp
= flinfo
->linenos
+ linoff
;
4640 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4641 lin
.l_addr
.l_symndx
= *indexp
;
4642 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4644 /* Copy the other entries, adjusting their addresses. */
4645 linpend
= linp
+ *lineno_counts
* linesz
;
4646 offset
= (o
->output_section
->vma
4649 for (linp
+= linesz
; linp
< linpend
; linp
+= linesz
)
4651 bfd_coff_swap_lineno_in (input_bfd
, linp
, &lin
);
4652 lin
.l_addr
.l_paddr
+= offset
;
4653 bfd_coff_swap_lineno_out (output_bfd
, &lin
, linp
);
4656 /* Write out the entries we've just processed. */
4657 pos
= (o
->output_section
->line_filepos
4658 + o
->output_section
->lineno_count
* linesz
);
4659 amt
= linesz
* *lineno_counts
;
4660 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4661 || bfd_bwrite (flinfo
->linenos
+ linoff
,
4662 amt
, output_bfd
) != amt
)
4664 o
->output_section
->lineno_count
+= *lineno_counts
;
4666 /* Record the offset of the symbol's line numbers
4667 in the output file. */
4668 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= pos
;
4672 struct internal_syment
*iisp
, *iispend
;
4675 bfd_vma range_start
, range_end
;
4678 /* Update any C_BINCL or C_EINCL symbols
4679 that refer to a line number in the
4680 range we just output. */
4681 iisp
= flinfo
->internal_syms
;
4682 iispend
= iisp
+ obj_raw_syment_count (input_bfd
);
4683 iindp
= flinfo
->sym_indices
;
4684 oos
= flinfo
->outsyms
;
4685 range_start
= enclosing
->line_filepos
+ linoff
;
4686 range_end
= range_start
+ *lineno_counts
* linesz
;
4687 while (iisp
< iispend
)
4690 && (iisp
->n_sclass
== C_BINCL
4691 || iisp
->n_sclass
== C_EINCL
)
4692 && iisp
->n_value
>= range_start
4693 && iisp
->n_value
< range_end
)
4695 struct internal_syment iis
;
4697 bfd_coff_swap_sym_in (output_bfd
, oos
, &iis
);
4698 iis
.n_value
= (iisp
->n_value
4701 bfd_coff_swap_sym_out (output_bfd
,
4706 iiadd
= 1 + iisp
->n_numaux
;
4708 oos
+= iiadd
* osymesz
;
4716 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, isymp
->n_type
,
4717 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4728 lineno_counts
+= add
;
4732 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
4733 symbol will be the first symbol in the next input file. In the
4734 normal case, this will save us from writing out the C_FILE symbol
4736 if (flinfo
->last_file_index
!= -1
4737 && (bfd_size_type
) flinfo
->last_file_index
>= syment_base
)
4739 flinfo
->last_file
.n_value
= output_index
;
4740 bfd_coff_swap_sym_out (output_bfd
, (void *) &flinfo
->last_file
,
4741 (void *) (flinfo
->outsyms
4742 + ((flinfo
->last_file_index
- syment_base
)
4746 /* Write the modified symbols to the output file. */
4747 if (outsym
> flinfo
->outsyms
)
4749 file_ptr pos
= obj_sym_filepos (output_bfd
) + syment_base
* osymesz
;
4750 bfd_size_type amt
= outsym
- flinfo
->outsyms
;
4751 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
4752 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
4755 BFD_ASSERT ((obj_raw_syment_count (output_bfd
)
4756 + (outsym
- flinfo
->outsyms
) / osymesz
)
4759 obj_raw_syment_count (output_bfd
) = output_index
;
4762 /* Don't let the linker relocation routines discard the symbols. */
4763 keep_syms
= obj_coff_keep_syms (input_bfd
);
4764 obj_coff_keep_syms (input_bfd
) = TRUE
;
4766 /* Relocate the contents of each section. */
4767 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4771 if (! o
->linker_mark
)
4772 /* This section was omitted from the link. */
4775 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4777 || (o
->flags
& SEC_IN_MEMORY
) != 0)
4780 /* We have set filepos correctly for the sections we created to
4781 represent csects, so bfd_get_section_contents should work. */
4782 if (coff_section_data (input_bfd
, o
) != NULL
4783 && coff_section_data (input_bfd
, o
)->contents
!= NULL
)
4784 contents
= coff_section_data (input_bfd
, o
)->contents
;
4787 bfd_size_type sz
= o
->rawsize
? o
->rawsize
: o
->size
;
4788 if (!bfd_get_section_contents (input_bfd
, o
, flinfo
->contents
, 0, sz
))
4790 contents
= flinfo
->contents
;
4793 if ((o
->flags
& SEC_RELOC
) != 0)
4796 struct internal_reloc
*internal_relocs
;
4797 struct internal_reloc
*irel
;
4799 struct internal_reloc
*irelend
;
4800 struct xcoff_link_hash_entry
**rel_hash
;
4803 /* Read in the relocs. */
4804 target_index
= o
->output_section
->target_index
;
4805 internal_relocs
= (xcoff_read_internal_relocs
4806 (input_bfd
, o
, FALSE
, flinfo
->external_relocs
,
4808 (flinfo
->section_info
[target_index
].relocs
4809 + o
->output_section
->reloc_count
)));
4810 if (internal_relocs
== NULL
)
4813 /* Call processor specific code to relocate the section
4815 if (! bfd_coff_relocate_section (output_bfd
, flinfo
->info
,
4819 flinfo
->internal_syms
,
4820 xcoff_data (input_bfd
)->csects
))
4823 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
4824 irel
= internal_relocs
;
4825 irelend
= irel
+ o
->reloc_count
;
4826 rel_hash
= (flinfo
->section_info
[target_index
].rel_hashes
4827 + o
->output_section
->reloc_count
);
4828 for (; irel
< irelend
; irel
++, rel_hash
++)
4830 struct xcoff_link_hash_entry
*h
= NULL
;
4834 /* Adjust the reloc address and symbol index. */
4836 irel
->r_vaddr
+= offset
;
4838 r_symndx
= irel
->r_symndx
;
4843 h
= obj_xcoff_sym_hashes (input_bfd
)[r_symndx
];
4845 if (r_symndx
!= -1 && flinfo
->info
->strip
!= strip_all
)
4848 && h
->smclas
!= XMC_TD
4849 && (irel
->r_type
== R_TOC
4850 || irel
->r_type
== R_GL
4851 || irel
->r_type
== R_TCL
4852 || irel
->r_type
== R_TRL
4853 || irel
->r_type
== R_TRLA
))
4855 /* This is a TOC relative reloc with a symbol
4856 attached. The symbol should be the one which
4857 this reloc is for. We want to make this
4858 reloc against the TOC address of the symbol,
4859 not the symbol itself. */
4860 BFD_ASSERT (h
->toc_section
!= NULL
);
4861 BFD_ASSERT ((h
->flags
& XCOFF_SET_TOC
) == 0);
4862 if (h
->u
.toc_indx
!= -1)
4863 irel
->r_symndx
= h
->u
.toc_indx
;
4866 struct xcoff_toc_rel_hash
*n
;
4867 struct xcoff_link_section_info
*si
;
4871 n
= bfd_alloc (flinfo
->output_bfd
, amt
);
4874 si
= flinfo
->section_info
+ target_index
;
4875 n
->next
= si
->toc_rel_hashes
;
4878 si
->toc_rel_hashes
= n
;
4883 /* This is a global symbol. */
4885 irel
->r_symndx
= h
->indx
;
4888 /* This symbol is being written at the end
4889 of the file, and we do not yet know the
4890 symbol index. We save the pointer to the
4891 hash table entry in the rel_hash list.
4892 We set the indx field to -2 to indicate
4893 that this symbol must not be stripped. */
4902 indx
= flinfo
->sym_indices
[r_symndx
];
4906 struct internal_syment
*is
;
4908 /* Relocations against a TC0 TOC anchor are
4909 automatically transformed to be against
4910 the TOC anchor in the output file. */
4911 is
= flinfo
->internal_syms
+ r_symndx
;
4912 if (is
->n_sclass
== C_HIDEXT
4913 && is
->n_numaux
> 0)
4916 union internal_auxent aux
;
4920 obj_coff_external_syms (input_bfd
))
4921 + ((r_symndx
+ is
->n_numaux
)
4923 bfd_coff_swap_aux_in (input_bfd
, auxptr
,
4924 is
->n_type
, is
->n_sclass
,
4928 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_SD
4929 && aux
.x_csect
.x_smclas
== XMC_TC0
)
4930 indx
= flinfo
->toc_symindx
;
4935 irel
->r_symndx
= indx
;
4939 struct internal_syment
*is
;
4942 char buf
[SYMNMLEN
+ 1];
4944 /* This reloc is against a symbol we are
4945 stripping. It would be possible to handle
4946 this case, but I don't think it's worth it. */
4947 is
= flinfo
->internal_syms
+ r_symndx
;
4949 if (is
->n_sclass
!= C_DWARF
)
4951 name
= (_bfd_coff_internal_syment_name
4952 (input_bfd
, is
, buf
));
4957 (*flinfo
->info
->callbacks
->unattached_reloc
)
4958 (flinfo
->info
, name
,
4959 input_bfd
, o
, irel
->r_vaddr
);
4965 if ((o
->flags
& SEC_DEBUGGING
) == 0
4966 && xcoff_need_ldrel_p (flinfo
->info
, irel
, h
))
4973 sec
= xcoff_data (input_bfd
)->csects
[r_symndx
];
4975 sec
= xcoff_symbol_section (h
);
4976 if (!xcoff_create_ldrel (output_bfd
, flinfo
,
4977 o
->output_section
, input_bfd
,
4983 o
->output_section
->reloc_count
+= o
->reloc_count
;
4986 /* Write out the modified section contents. */
4987 if (! bfd_set_section_contents (output_bfd
, o
->output_section
,
4988 contents
, (file_ptr
) o
->output_offset
,
4993 obj_coff_keep_syms (input_bfd
) = keep_syms
;
4995 if (! flinfo
->info
->keep_memory
)
4997 if (! _bfd_coff_free_symbols (input_bfd
))
5004 obj_coff_keep_syms (input_bfd
) = keep_syms
;
5011 /* Sort relocs by VMA. This is called via qsort. */
5014 xcoff_sort_relocs (const void * p1
, const void * p2
)
5016 const struct internal_reloc
*r1
= (const struct internal_reloc
*) p1
;
5017 const struct internal_reloc
*r2
= (const struct internal_reloc
*) p2
;
5019 if (r1
->r_vaddr
> r2
->r_vaddr
)
5021 else if (r1
->r_vaddr
< r2
->r_vaddr
)
5027 /* Return true if section SEC is a TOC section. */
5029 static inline bfd_boolean
5030 xcoff_toc_section_p (asection
*sec
)
5035 if (name
[0] == '.' && name
[1] == 't')
5039 if (name
[3] == '0' && name
[4] == 0)
5044 if (name
[2] == 'd' && name
[3] == 0)
5050 /* See if the link requires a TOC (it usually does!). If so, find a
5051 good place to put the TOC anchor csect, and write out the associated
5055 xcoff_find_tc0 (bfd
*output_bfd
, struct xcoff_final_link_info
*flinfo
)
5057 bfd_vma toc_start
, toc_end
, start
, end
, best_address
;
5061 struct internal_syment irsym
;
5062 union internal_auxent iraux
;
5066 /* Set [TOC_START, TOC_END) to the range of the TOC. Record the
5067 index of a csect at the beginning of the TOC. */
5068 toc_start
= ~(bfd_vma
) 0;
5071 for (input_bfd
= flinfo
->info
->input_bfds
;
5073 input_bfd
= input_bfd
->link
.next
)
5074 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5075 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5077 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5078 if (toc_start
> start
)
5081 section_index
= sec
->output_section
->target_index
;
5084 end
= start
+ sec
->size
;
5089 /* There's no need for a TC0 symbol if we don't have a TOC. */
5090 if (toc_end
< toc_start
)
5092 xcoff_data (output_bfd
)->toc
= toc_start
;
5096 if (toc_end
- toc_start
< 0x8000)
5097 /* Every TOC csect can be accessed from TOC_START. */
5098 best_address
= toc_start
;
5101 /* Find the lowest TOC csect that is still within range of TOC_END. */
5102 best_address
= toc_end
;
5103 for (input_bfd
= flinfo
->info
->input_bfds
;
5105 input_bfd
= input_bfd
->link
.next
)
5106 for (sec
= input_bfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
5107 if ((sec
->flags
& SEC_MARK
) != 0 && xcoff_toc_section_p (sec
))
5109 start
= sec
->output_section
->vma
+ sec
->output_offset
;
5110 if (start
< best_address
5111 && start
+ 0x8000 >= toc_end
)
5113 best_address
= start
;
5114 section_index
= sec
->output_section
->target_index
;
5118 /* Make sure that the start of the TOC is also within range. */
5119 if (best_address
> toc_start
+ 0x8000)
5122 (_("TOC overflow: %#" PRIx64
" > 0x10000; try -mminimal-toc "
5124 (uint64_t) (toc_end
- toc_start
));
5125 bfd_set_error (bfd_error_file_too_big
);
5130 /* Record the chosen TOC value. */
5131 flinfo
->toc_symindx
= obj_raw_syment_count (output_bfd
);
5132 xcoff_data (output_bfd
)->toc
= best_address
;
5133 xcoff_data (output_bfd
)->sntoc
= section_index
;
5135 /* Fill out the TC0 symbol. */
5136 if (!bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5139 irsym
.n_value
= best_address
;
5140 irsym
.n_scnum
= section_index
;
5141 irsym
.n_sclass
= C_HIDEXT
;
5142 irsym
.n_type
= T_NULL
;
5144 bfd_coff_swap_sym_out (output_bfd
, &irsym
, flinfo
->outsyms
);
5146 /* Fill out the auxillary csect information. */
5147 memset (&iraux
, 0, sizeof iraux
);
5148 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5149 iraux
.x_csect
.x_smclas
= XMC_TC0
;
5150 iraux
.x_csect
.x_scnlen
.l
= 0;
5151 bfd_coff_swap_aux_out (output_bfd
, &iraux
, T_NULL
, C_HIDEXT
, 0, 1,
5152 flinfo
->outsyms
+ bfd_coff_symesz (output_bfd
));
5154 /* Write the contents to the file. */
5155 pos
= obj_sym_filepos (output_bfd
);
5156 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5157 size
= 2 * bfd_coff_symesz (output_bfd
);
5158 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5159 || bfd_bwrite (flinfo
->outsyms
, size
, output_bfd
) != size
)
5161 obj_raw_syment_count (output_bfd
) += 2;
5166 /* Write out a non-XCOFF global symbol. */
5169 xcoff_write_global_symbol (struct bfd_hash_entry
*bh
, void * inf
)
5171 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) bh
;
5172 struct xcoff_final_link_info
*flinfo
= (struct xcoff_final_link_info
*) inf
;
5175 struct internal_syment isym
;
5176 union internal_auxent aux
;
5181 output_bfd
= flinfo
->output_bfd
;
5182 outsym
= flinfo
->outsyms
;
5184 if (h
->root
.type
== bfd_link_hash_warning
)
5186 h
= (struct xcoff_link_hash_entry
*) h
->root
.u
.i
.link
;
5187 if (h
->root
.type
== bfd_link_hash_new
)
5191 /* If this symbol was garbage collected, just skip it. */
5192 if (xcoff_hash_table (flinfo
->info
)->gc
5193 && (h
->flags
& XCOFF_MARK
) == 0)
5196 /* If we need a .loader section entry, write it out. */
5197 if (h
->ldsym
!= NULL
)
5199 struct internal_ldsym
*ldsym
;
5204 if (h
->root
.type
== bfd_link_hash_undefined
5205 || h
->root
.type
== bfd_link_hash_undefweak
)
5209 ldsym
->l_scnum
= N_UNDEF
;
5210 ldsym
->l_smtype
= XTY_ER
;
5211 impbfd
= h
->root
.u
.undef
.abfd
;
5214 else if (h
->root
.type
== bfd_link_hash_defined
5215 || h
->root
.type
== bfd_link_hash_defweak
)
5219 sec
= h
->root
.u
.def
.section
;
5220 ldsym
->l_value
= (sec
->output_section
->vma
5221 + sec
->output_offset
5222 + h
->root
.u
.def
.value
);
5223 ldsym
->l_scnum
= sec
->output_section
->target_index
;
5224 ldsym
->l_smtype
= XTY_SD
;
5225 impbfd
= sec
->owner
;
5231 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
5232 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5233 || (h
->flags
& XCOFF_IMPORT
) != 0)
5235 Import symbols are defined so the check above will make
5236 the l_smtype XTY_SD. But this is not correct, it should
5238 ldsym
->l_smtype
|= L_IMPORT
;
5240 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
5241 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
5242 || (h
->flags
& XCOFF_EXPORT
) != 0)
5243 ldsym
->l_smtype
|= L_EXPORT
;
5245 if ((h
->flags
& XCOFF_ENTRY
) != 0)
5246 ldsym
->l_smtype
|= L_ENTRY
;
5248 if ((h
->flags
& XCOFF_RTINIT
) != 0)
5249 ldsym
->l_smtype
= XTY_SD
;
5251 ldsym
->l_smclas
= h
->smclas
;
5253 if (ldsym
->l_smtype
& L_IMPORT
)
5255 if ((h
->root
.type
== bfd_link_hash_defined
5256 || h
->root
.type
== bfd_link_hash_defweak
)
5257 && (h
->root
.u
.def
.value
!= 0))
5258 ldsym
->l_smclas
= XMC_XO
;
5260 else if ((h
->flags
& (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
)) ==
5261 (XCOFF_SYSCALL32
| XCOFF_SYSCALL64
))
5262 ldsym
->l_smclas
= XMC_SV3264
;
5264 else if (h
->flags
& XCOFF_SYSCALL32
)
5265 ldsym
->l_smclas
= XMC_SV
;
5267 else if (h
->flags
& XCOFF_SYSCALL64
)
5268 ldsym
->l_smclas
= XMC_SV64
;
5271 if (ldsym
->l_ifile
== -(bfd_size_type
) 1)
5275 else if (ldsym
->l_ifile
== 0)
5277 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
5279 else if (impbfd
== NULL
)
5283 BFD_ASSERT (impbfd
->xvec
== output_bfd
->xvec
);
5284 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
5290 BFD_ASSERT (h
->ldindx
>= 0);
5292 bfd_xcoff_swap_ldsym_out (output_bfd
, ldsym
,
5295 * bfd_xcoff_ldsymsz(flinfo
->output_bfd
)));
5299 /* If this symbol needs global linkage code, write it out. */
5300 if (h
->root
.type
== bfd_link_hash_defined
5301 && (h
->root
.u
.def
.section
5302 == xcoff_hash_table (flinfo
->info
)->linkage_section
))
5308 p
= h
->root
.u
.def
.section
->contents
+ h
->root
.u
.def
.value
;
5310 /* The first instruction in the global linkage code loads a
5311 specific TOC element. */
5312 tocoff
= (h
->descriptor
->toc_section
->output_section
->vma
5313 + h
->descriptor
->toc_section
->output_offset
5314 - xcoff_data (output_bfd
)->toc
);
5316 if ((h
->descriptor
->flags
& XCOFF_SET_TOC
) != 0)
5317 tocoff
+= h
->descriptor
->u
.toc_offset
;
5319 /* The first instruction in the glink code needs to be
5320 cooked to hold the correct offset in the toc. The
5321 rest are just output raw. */
5322 bfd_put_32 (output_bfd
,
5323 bfd_xcoff_glink_code(output_bfd
, 0) | (tocoff
& 0xffff), p
);
5325 /* Start with i == 1 to get past the first instruction done above
5326 The /4 is because the glink code is in bytes and we are going
5328 for (i
= 1; i
< bfd_xcoff_glink_code_size(output_bfd
) / 4; i
++)
5329 bfd_put_32 (output_bfd
,
5330 (bfd_vma
) bfd_xcoff_glink_code(output_bfd
, i
),
5334 /* If we created a TOC entry for this symbol, write out the required
5336 if ((h
->flags
& XCOFF_SET_TOC
) != 0)
5341 struct internal_reloc
*irel
;
5342 struct internal_syment irsym
;
5343 union internal_auxent iraux
;
5345 tocsec
= h
->toc_section
;
5346 osec
= tocsec
->output_section
;
5347 oindx
= osec
->target_index
;
5348 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5349 irel
->r_vaddr
= (osec
->vma
5350 + tocsec
->output_offset
5354 irel
->r_symndx
= h
->indx
;
5358 irel
->r_symndx
= obj_raw_syment_count (output_bfd
);
5361 BFD_ASSERT (h
->ldindx
>= 0);
5363 /* Initialize the aux union here instead of closer to when it is
5364 written out below because the length of the csect depends on
5365 whether the output is 32 or 64 bit. */
5366 memset (&iraux
, 0, sizeof iraux
);
5367 iraux
.x_csect
.x_smtyp
= XTY_SD
;
5368 /* iraux.x_csect.x_scnlen.l = 4 or 8, see below. */
5369 iraux
.x_csect
.x_smclas
= XMC_TC
;
5371 /* 32 bit uses a 32 bit R_POS to do the relocations
5372 64 bit uses a 64 bit R_POS to do the relocations
5374 Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit
5376 Which one is determined by the backend. */
5377 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5380 iraux
.x_csect
.x_scnlen
.l
= 8;
5382 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5385 iraux
.x_csect
.x_scnlen
.l
= 4;
5390 irel
->r_type
= R_POS
;
5391 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5392 ++osec
->reloc_count
;
5394 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5395 output_bfd
, irel
, NULL
, h
))
5398 /* We need to emit a symbol to define a csect which holds
5400 if (flinfo
->info
->strip
!= strip_all
)
5402 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
,
5404 &irsym
, h
->root
.root
.string
);
5408 irsym
.n_value
= irel
->r_vaddr
;
5409 irsym
.n_scnum
= osec
->target_index
;
5410 irsym
.n_sclass
= C_HIDEXT
;
5411 irsym
.n_type
= T_NULL
;
5414 bfd_coff_swap_sym_out (output_bfd
, (void *) &irsym
, (void *) outsym
);
5415 outsym
+= bfd_coff_symesz (output_bfd
);
5417 /* Note : iraux is initialized above. */
5418 bfd_coff_swap_aux_out (output_bfd
, (void *) &iraux
, T_NULL
, C_HIDEXT
,
5419 0, 1, (void *) outsym
);
5420 outsym
+= bfd_coff_auxesz (output_bfd
);
5424 /* We aren't going to write out the symbols below, so we
5425 need to write them out now. */
5426 pos
= obj_sym_filepos (output_bfd
);
5427 pos
+= (obj_raw_syment_count (output_bfd
)
5428 * bfd_coff_symesz (output_bfd
));
5429 amt
= outsym
- flinfo
->outsyms
;
5430 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5431 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5433 obj_raw_syment_count (output_bfd
) +=
5434 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5436 outsym
= flinfo
->outsyms
;
5441 /* If this symbol is a specially defined function descriptor, write
5442 it out. The first word is the address of the function code
5443 itself, the second word is the address of the TOC, and the third
5447 The addresses for the 32 bit will take 4 bytes and the addresses
5448 for 64 bit will take 8 bytes. Similar for the relocs. This type
5449 of logic was also done above to create a TOC entry in
5450 xcoff_write_global_symbol. */
5451 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
5452 && h
->root
.type
== bfd_link_hash_defined
5453 && (h
->root
.u
.def
.section
5454 == xcoff_hash_table (flinfo
->info
)->descriptor_section
))
5460 struct xcoff_link_hash_entry
*hentry
;
5462 struct internal_reloc
*irel
;
5464 unsigned int reloc_size
, byte_size
;
5466 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5471 else if (bfd_xcoff_is_xcoff32 (output_bfd
))
5479 sec
= h
->root
.u
.def
.section
;
5480 osec
= sec
->output_section
;
5481 oindx
= osec
->target_index
;
5482 p
= sec
->contents
+ h
->root
.u
.def
.value
;
5484 hentry
= h
->descriptor
;
5485 BFD_ASSERT (hentry
!= NULL
5486 && (hentry
->root
.type
== bfd_link_hash_defined
5487 || hentry
->root
.type
== bfd_link_hash_defweak
));
5488 esec
= hentry
->root
.u
.def
.section
;
5490 irel
= flinfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5491 irel
->r_vaddr
= (osec
->vma
5492 + sec
->output_offset
5493 + h
->root
.u
.def
.value
);
5494 irel
->r_symndx
= esec
->output_section
->target_index
;
5495 irel
->r_type
= R_POS
;
5496 irel
->r_size
= reloc_size
;
5497 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5498 ++osec
->reloc_count
;
5500 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5501 output_bfd
, irel
, esec
, NULL
))
5504 /* There are three items to write out,
5505 the address of the code
5506 the address of the toc anchor
5507 the environment pointer.
5508 We are ignoring the environment pointer. So set it to zero. */
5509 if (bfd_xcoff_is_xcoff64 (output_bfd
))
5511 bfd_put_64 (output_bfd
,
5512 (esec
->output_section
->vma
+ esec
->output_offset
5513 + hentry
->root
.u
.def
.value
),
5515 bfd_put_64 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 8);
5516 bfd_put_64 (output_bfd
, (bfd_vma
) 0, p
+ 16);
5521 This logic was already called above so the error case where
5522 the backend is neither has already been checked. */
5523 bfd_put_32 (output_bfd
,
5524 (esec
->output_section
->vma
+ esec
->output_offset
5525 + hentry
->root
.u
.def
.value
),
5527 bfd_put_32 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 4);
5528 bfd_put_32 (output_bfd
, (bfd_vma
) 0, p
+ 8);
5531 tsec
= coff_section_from_bfd_index (output_bfd
,
5532 xcoff_data (output_bfd
)->sntoc
);
5535 irel
->r_vaddr
= (osec
->vma
5536 + sec
->output_offset
5537 + h
->root
.u
.def
.value
5539 irel
->r_symndx
= tsec
->output_section
->target_index
;
5540 irel
->r_type
= R_POS
;
5541 irel
->r_size
= reloc_size
;
5542 flinfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5543 ++osec
->reloc_count
;
5545 if (!xcoff_create_ldrel (output_bfd
, flinfo
, osec
,
5546 output_bfd
, irel
, tsec
, NULL
))
5550 if (h
->indx
>= 0 || flinfo
->info
->strip
== strip_all
)
5552 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5557 && (flinfo
->info
->strip
== strip_all
5558 || (flinfo
->info
->strip
== strip_some
5559 && bfd_hash_lookup (flinfo
->info
->keep_hash
, h
->root
.root
.string
,
5560 FALSE
, FALSE
) == NULL
)))
5562 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5567 && (h
->flags
& (XCOFF_REF_REGULAR
| XCOFF_DEF_REGULAR
)) == 0)
5569 BFD_ASSERT (outsym
== flinfo
->outsyms
);
5573 memset (&aux
, 0, sizeof aux
);
5575 h
->indx
= obj_raw_syment_count (output_bfd
);
5577 result
= bfd_xcoff_put_symbol_name (output_bfd
, flinfo
->info
, flinfo
->strtab
,
5578 &isym
, h
->root
.root
.string
);
5582 if (h
->root
.type
== bfd_link_hash_undefined
5583 || h
->root
.type
== bfd_link_hash_undefweak
)
5586 isym
.n_scnum
= N_UNDEF
;
5587 if (h
->root
.type
== bfd_link_hash_undefweak
5588 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5589 isym
.n_sclass
= C_WEAKEXT
;
5591 isym
.n_sclass
= C_EXT
;
5592 aux
.x_csect
.x_smtyp
= XTY_ER
;
5594 else if ((h
->root
.type
== bfd_link_hash_defined
5595 || h
->root
.type
== bfd_link_hash_defweak
)
5596 && h
->smclas
== XMC_XO
)
5598 BFD_ASSERT (bfd_is_abs_symbol (&h
->root
));
5599 isym
.n_value
= h
->root
.u
.def
.value
;
5600 isym
.n_scnum
= N_UNDEF
;
5601 if (h
->root
.type
== bfd_link_hash_defweak
5602 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5603 isym
.n_sclass
= C_WEAKEXT
;
5605 isym
.n_sclass
= C_EXT
;
5606 aux
.x_csect
.x_smtyp
= XTY_ER
;
5608 else if (h
->root
.type
== bfd_link_hash_defined
5609 || h
->root
.type
== bfd_link_hash_defweak
)
5611 struct xcoff_link_size_list
*l
;
5613 isym
.n_value
= (h
->root
.u
.def
.section
->output_section
->vma
5614 + h
->root
.u
.def
.section
->output_offset
5615 + h
->root
.u
.def
.value
);
5616 if (bfd_is_abs_section (h
->root
.u
.def
.section
->output_section
))
5617 isym
.n_scnum
= N_ABS
;
5619 isym
.n_scnum
= h
->root
.u
.def
.section
->output_section
->target_index
;
5620 isym
.n_sclass
= C_HIDEXT
;
5621 aux
.x_csect
.x_smtyp
= XTY_SD
;
5623 if ((h
->flags
& XCOFF_HAS_SIZE
) != 0)
5625 for (l
= xcoff_hash_table (flinfo
->info
)->size_list
;
5631 aux
.x_csect
.x_scnlen
.l
= l
->size
;
5637 else if (h
->root
.type
== bfd_link_hash_common
)
5639 isym
.n_value
= (h
->root
.u
.c
.p
->section
->output_section
->vma
5640 + h
->root
.u
.c
.p
->section
->output_offset
);
5641 isym
.n_scnum
= h
->root
.u
.c
.p
->section
->output_section
->target_index
;
5642 isym
.n_sclass
= C_EXT
;
5643 aux
.x_csect
.x_smtyp
= XTY_CM
;
5644 aux
.x_csect
.x_scnlen
.l
= h
->root
.u
.c
.size
;
5649 isym
.n_type
= T_NULL
;
5652 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5653 outsym
+= bfd_coff_symesz (output_bfd
);
5655 aux
.x_csect
.x_smclas
= h
->smclas
;
5656 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, isym
.n_sclass
, 0, 1,
5658 outsym
+= bfd_coff_auxesz (output_bfd
);
5660 if ((h
->root
.type
== bfd_link_hash_defined
5661 || h
->root
.type
== bfd_link_hash_defweak
)
5662 && h
->smclas
!= XMC_XO
)
5664 /* We just output an SD symbol. Now output an LD symbol. */
5667 if (h
->root
.type
== bfd_link_hash_defweak
5668 && C_WEAKEXT
== C_AIX_WEAKEXT
)
5669 isym
.n_sclass
= C_WEAKEXT
;
5671 isym
.n_sclass
= C_EXT
;
5672 bfd_coff_swap_sym_out (output_bfd
, (void *) &isym
, (void *) outsym
);
5673 outsym
+= bfd_coff_symesz (output_bfd
);
5675 aux
.x_csect
.x_smtyp
= XTY_LD
;
5676 aux
.x_csect
.x_scnlen
.l
= obj_raw_syment_count (output_bfd
);
5677 bfd_coff_swap_aux_out (output_bfd
, (void *) &aux
, T_NULL
, C_EXT
, 0, 1,
5679 outsym
+= bfd_coff_auxesz (output_bfd
);
5682 pos
= obj_sym_filepos (output_bfd
);
5683 pos
+= obj_raw_syment_count (output_bfd
) * bfd_coff_symesz (output_bfd
);
5684 amt
= outsym
- flinfo
->outsyms
;
5685 if (bfd_seek (output_bfd
, pos
, SEEK_SET
) != 0
5686 || bfd_bwrite (flinfo
->outsyms
, amt
, output_bfd
) != amt
)
5688 obj_raw_syment_count (output_bfd
) +=
5689 (outsym
- flinfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5694 /* Handle a link order which is supposed to generate a reloc. */
5697 xcoff_reloc_link_order (bfd
*output_bfd
,
5698 struct xcoff_final_link_info
*flinfo
,
5699 asection
*output_section
,
5700 struct bfd_link_order
*link_order
)
5702 reloc_howto_type
*howto
;
5703 struct xcoff_link_hash_entry
*h
;
5707 struct internal_reloc
*irel
;
5708 struct xcoff_link_hash_entry
**rel_hash_ptr
;
5710 if (link_order
->type
== bfd_section_reloc_link_order
)
5711 /* We need to somehow locate a symbol in the right section. The
5712 symbol must either have a value of zero, or we must adjust
5713 the addend by the value of the symbol. FIXME: Write this
5714 when we need it. The old linker couldn't handle this anyhow. */
5717 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5720 bfd_set_error (bfd_error_bad_value
);
5724 h
= ((struct xcoff_link_hash_entry
*)
5725 bfd_wrapped_link_hash_lookup (output_bfd
, flinfo
->info
,
5726 link_order
->u
.reloc
.p
->u
.name
,
5727 FALSE
, FALSE
, TRUE
));
5730 (*flinfo
->info
->callbacks
->unattached_reloc
)
5731 (flinfo
->info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, (bfd_vma
) 0);
5735 hsec
= xcoff_symbol_section (h
);
5736 if (h
->root
.type
== bfd_link_hash_defined
5737 || h
->root
.type
== bfd_link_hash_defweak
)
5738 hval
= h
->root
.u
.def
.value
;
5742 addend
= link_order
->u
.reloc
.p
->addend
;
5744 addend
+= (hsec
->output_section
->vma
5745 + hsec
->output_offset
5752 bfd_reloc_status_type rstat
;
5755 size
= bfd_get_reloc_size (howto
);
5756 buf
= bfd_zmalloc (size
);
5757 if (buf
== NULL
&& size
!= 0)
5760 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5766 case bfd_reloc_outofrange
:
5768 case bfd_reloc_overflow
:
5769 (*flinfo
->info
->callbacks
->reloc_overflow
)
5770 (flinfo
->info
, NULL
, link_order
->u
.reloc
.p
->u
.name
,
5771 howto
->name
, addend
, NULL
, NULL
, (bfd_vma
) 0);
5774 ok
= bfd_set_section_contents (output_bfd
, output_section
, (void *) buf
,
5775 (file_ptr
) link_order
->offset
, size
);
5781 /* Store the reloc information in the right place. It will get
5782 swapped and written out at the end of the final_link routine. */
5783 irel
= (flinfo
->section_info
[output_section
->target_index
].relocs
5784 + output_section
->reloc_count
);
5785 rel_hash_ptr
= (flinfo
->section_info
[output_section
->target_index
].rel_hashes
5786 + output_section
->reloc_count
);
5788 memset (irel
, 0, sizeof (struct internal_reloc
));
5789 *rel_hash_ptr
= NULL
;
5791 irel
->r_vaddr
= output_section
->vma
+ link_order
->offset
;
5794 irel
->r_symndx
= h
->indx
;
5797 /* Set the index to -2 to force this symbol to get written out. */
5803 irel
->r_type
= howto
->type
;
5804 irel
->r_size
= howto
->bitsize
- 1;
5805 if (howto
->complain_on_overflow
== complain_overflow_signed
)
5806 irel
->r_size
|= 0x80;
5808 ++output_section
->reloc_count
;
5810 /* Now output the reloc to the .loader section. */
5811 if (xcoff_hash_table (flinfo
->info
)->loader_section
)
5813 if (!xcoff_create_ldrel (output_bfd
, flinfo
, output_section
,
5814 output_bfd
, irel
, hsec
, h
))
5821 /* Do the final link step. */
5824 _bfd_xcoff_bfd_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5826 bfd_size_type symesz
;
5827 struct xcoff_final_link_info flinfo
;
5829 struct bfd_link_order
*p
;
5830 bfd_size_type max_contents_size
;
5831 bfd_size_type max_sym_count
;
5832 bfd_size_type max_lineno_count
;
5833 bfd_size_type max_reloc_count
;
5834 bfd_size_type max_output_reloc_count
;
5835 file_ptr rel_filepos
;
5837 file_ptr line_filepos
;
5838 unsigned int linesz
;
5840 bfd_byte
*external_relocs
= NULL
;
5841 char strbuf
[STRING_SIZE_SIZE
];
5845 if (bfd_link_pic (info
))
5846 abfd
->flags
|= DYNAMIC
;
5848 symesz
= bfd_coff_symesz (abfd
);
5851 flinfo
.output_bfd
= abfd
;
5852 flinfo
.strtab
= NULL
;
5853 flinfo
.section_info
= NULL
;
5854 flinfo
.last_file_index
= -1;
5855 flinfo
.toc_symindx
= -1;
5856 flinfo
.internal_syms
= NULL
;
5857 flinfo
.sym_indices
= NULL
;
5858 flinfo
.outsyms
= NULL
;
5859 flinfo
.linenos
= NULL
;
5860 flinfo
.contents
= NULL
;
5861 flinfo
.external_relocs
= NULL
;
5863 if (xcoff_hash_table (info
)->loader_section
)
5865 flinfo
.ldsym
= (xcoff_hash_table (info
)->loader_section
->contents
5866 + bfd_xcoff_ldhdrsz (abfd
));
5867 flinfo
.ldrel
= (xcoff_hash_table (info
)->loader_section
->contents
5868 + bfd_xcoff_ldhdrsz (abfd
)
5869 + (xcoff_hash_table (info
)->ldhdr
.l_nsyms
5870 * bfd_xcoff_ldsymsz (abfd
)));
5874 flinfo
.ldsym
= NULL
;
5875 flinfo
.ldrel
= NULL
;
5878 xcoff_data (abfd
)->coff
.link_info
= info
;
5880 flinfo
.strtab
= _bfd_stringtab_init ();
5881 if (flinfo
.strtab
== NULL
)
5884 /* Count the relocation entries required for the output file.
5885 (We've already counted the line numbers.) Determine a few
5887 max_contents_size
= 0;
5888 max_lineno_count
= 0;
5889 max_reloc_count
= 0;
5890 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5893 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
5895 if (p
->type
== bfd_indirect_link_order
)
5899 sec
= p
->u
.indirect
.section
;
5901 /* Mark all sections which are to be included in the
5902 link. This will normally be every section. We need
5903 to do this so that we can identify any sections which
5904 the linker has decided to not include. */
5905 sec
->linker_mark
= TRUE
;
5907 o
->reloc_count
+= sec
->reloc_count
;
5909 if ((sec
->flags
& SEC_IN_MEMORY
) == 0)
5911 if (sec
->rawsize
> max_contents_size
)
5912 max_contents_size
= sec
->rawsize
;
5913 if (sec
->size
> max_contents_size
)
5914 max_contents_size
= sec
->size
;
5916 if (coff_section_data (sec
->owner
, sec
) != NULL
5917 && xcoff_section_data (sec
->owner
, sec
) != NULL
5918 && (xcoff_section_data (sec
->owner
, sec
)->lineno_count
5919 > max_lineno_count
))
5921 xcoff_section_data (sec
->owner
, sec
)->lineno_count
;
5922 if (sec
->reloc_count
> max_reloc_count
)
5923 max_reloc_count
= sec
->reloc_count
;
5925 else if (p
->type
== bfd_section_reloc_link_order
5926 || p
->type
== bfd_symbol_reloc_link_order
)
5931 /* Compute the file positions for all the sections. */
5932 if (abfd
->output_has_begun
)
5934 if (xcoff_hash_table (info
)->file_align
!= 0)
5941 file_align
= xcoff_hash_table (info
)->file_align
;
5942 if (file_align
!= 0)
5944 bfd_boolean saw_contents
;
5948 /* Insert .pad sections before every section which has
5949 contents and is loaded, if it is preceded by some other
5950 section which has contents and is loaded. */
5951 saw_contents
= TRUE
;
5952 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5954 if (strcmp (o
->name
, ".pad") == 0)
5955 saw_contents
= FALSE
;
5956 else if ((o
->flags
& SEC_HAS_CONTENTS
) != 0
5957 && (o
->flags
& SEC_LOAD
) != 0)
5960 saw_contents
= TRUE
;
5965 /* Create a pad section and place it before the section
5966 that needs padding. This requires unlinking and
5967 relinking the bfd's section list. */
5969 n
= bfd_make_section_anyway_with_flags (abfd
, ".pad",
5971 n
->alignment_power
= 0;
5973 bfd_section_list_remove (abfd
, n
);
5974 bfd_section_list_insert_before (abfd
, o
, n
);
5975 saw_contents
= FALSE
;
5980 /* Reset the section indices after inserting the new
5983 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5986 o
->target_index
= indx
;
5988 BFD_ASSERT ((unsigned int) indx
== abfd
->section_count
);
5990 /* Work out appropriate sizes for the .pad sections to force
5991 each section to land on a page boundary. This bit of
5992 code knows what compute_section_file_positions is going
5994 sofar
= bfd_coff_filhsz (abfd
);
5995 sofar
+= bfd_coff_aoutsz (abfd
);
5996 sofar
+= abfd
->section_count
* bfd_coff_scnhsz (abfd
);
5997 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5998 if ((bfd_xcoff_is_reloc_count_overflow
5999 (abfd
, (bfd_vma
) o
->reloc_count
))
6000 || (bfd_xcoff_is_lineno_count_overflow
6001 (abfd
, (bfd_vma
) o
->lineno_count
)))
6002 /* 64 does not overflow, need to check if 32 does */
6003 sofar
+= bfd_coff_scnhsz (abfd
);
6005 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6007 if (strcmp (o
->name
, ".pad") == 0)
6011 BFD_ASSERT (o
->size
== 0);
6012 pageoff
= sofar
& (file_align
- 1);
6015 o
->size
= file_align
- pageoff
;
6016 sofar
+= file_align
- pageoff
;
6017 o
->flags
|= SEC_HAS_CONTENTS
;
6022 if ((o
->flags
& SEC_HAS_CONTENTS
) != 0)
6023 sofar
+= BFD_ALIGN (o
->size
,
6024 1 << o
->alignment_power
);
6029 if (! bfd_coff_compute_section_file_positions (abfd
))
6033 /* Allocate space for the pointers we need to keep for the relocs. */
6037 /* We use section_count + 1, rather than section_count, because
6038 the target_index fields are 1 based. */
6039 amt
= abfd
->section_count
+ 1;
6040 amt
*= sizeof (struct xcoff_link_section_info
);
6041 flinfo
.section_info
= bfd_malloc (amt
);
6042 if (flinfo
.section_info
== NULL
)
6044 for (i
= 0; i
<= abfd
->section_count
; i
++)
6046 flinfo
.section_info
[i
].relocs
= NULL
;
6047 flinfo
.section_info
[i
].rel_hashes
= NULL
;
6048 flinfo
.section_info
[i
].toc_rel_hashes
= NULL
;
6052 /* Set the file positions for the relocs. */
6053 rel_filepos
= obj_relocbase (abfd
);
6054 relsz
= bfd_coff_relsz (abfd
);
6055 max_output_reloc_count
= 0;
6056 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6058 if (o
->reloc_count
== 0)
6062 /* A stripped file has no relocs. However, we still
6063 allocate the buffers, so that later code doesn't have to
6064 worry about whether we are stripping or not. */
6065 if (info
->strip
== strip_all
)
6069 o
->flags
|= SEC_RELOC
;
6070 o
->rel_filepos
= rel_filepos
;
6071 rel_filepos
+= o
->reloc_count
* relsz
;
6074 /* We don't know the indices of global symbols until we have
6075 written out all the local symbols. For each section in
6076 the output file, we keep an array of pointers to hash
6077 table entries. Each entry in the array corresponds to a
6078 reloc. When we find a reloc against a global symbol, we
6079 set the corresponding entry in this array so that we can
6080 fix up the symbol index after we have written out all the
6083 Because of this problem, we also keep the relocs in
6084 memory until the end of the link. This wastes memory.
6085 We could backpatch the file later, I suppose, although it
6087 amt
= o
->reloc_count
;
6088 amt
*= sizeof (struct internal_reloc
);
6089 flinfo
.section_info
[o
->target_index
].relocs
= bfd_malloc (amt
);
6091 amt
= o
->reloc_count
;
6092 amt
*= sizeof (struct xcoff_link_hash_entry
*);
6093 flinfo
.section_info
[o
->target_index
].rel_hashes
= bfd_malloc (amt
);
6095 if (flinfo
.section_info
[o
->target_index
].relocs
== NULL
6096 || flinfo
.section_info
[o
->target_index
].rel_hashes
== NULL
)
6099 if (o
->reloc_count
> max_output_reloc_count
)
6100 max_output_reloc_count
= o
->reloc_count
;
6104 /* We now know the size of the relocs, so we can determine the file
6105 positions of the line numbers. */
6106 line_filepos
= rel_filepos
;
6107 flinfo
.line_filepos
= line_filepos
;
6108 linesz
= bfd_coff_linesz (abfd
);
6109 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6111 if (o
->lineno_count
== 0)
6112 o
->line_filepos
= 0;
6115 o
->line_filepos
= line_filepos
;
6116 line_filepos
+= o
->lineno_count
* linesz
;
6119 /* Reset the reloc and lineno counts, so that we can use them to
6120 count the number of entries we have output so far. */
6122 o
->lineno_count
= 0;
6125 obj_sym_filepos (abfd
) = line_filepos
;
6127 /* Figure out the largest number of symbols in an input BFD. Take
6128 the opportunity to clear the output_has_begun fields of all the
6129 input BFD's. We want at least 6 symbols, since that is the
6130 number which xcoff_write_global_symbol may need. */
6132 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
6136 sub
->output_has_begun
= FALSE
;
6137 sz
= obj_raw_syment_count (sub
);
6138 if (sz
> max_sym_count
)
6142 /* Allocate some buffers used while linking. */
6143 amt
= max_sym_count
* sizeof (struct internal_syment
);
6144 flinfo
.internal_syms
= bfd_malloc (amt
);
6146 amt
= max_sym_count
* sizeof (long);
6147 flinfo
.sym_indices
= bfd_malloc (amt
);
6149 amt
= (max_sym_count
+ 1) * symesz
;
6150 flinfo
.outsyms
= bfd_malloc (amt
);
6152 amt
= max_lineno_count
* bfd_coff_linesz (abfd
);
6153 flinfo
.linenos
= bfd_malloc (amt
);
6155 amt
= max_contents_size
;
6156 flinfo
.contents
= bfd_malloc (amt
);
6158 amt
= max_reloc_count
* relsz
;
6159 flinfo
.external_relocs
= bfd_malloc (amt
);
6161 if ((flinfo
.internal_syms
== NULL
&& max_sym_count
> 0)
6162 || (flinfo
.sym_indices
== NULL
&& max_sym_count
> 0)
6163 || flinfo
.outsyms
== NULL
6164 || (flinfo
.linenos
== NULL
&& max_lineno_count
> 0)
6165 || (flinfo
.contents
== NULL
&& max_contents_size
> 0)
6166 || (flinfo
.external_relocs
== NULL
&& max_reloc_count
> 0))
6169 obj_raw_syment_count (abfd
) = 0;
6171 /* Find a TOC symbol, if we need one. */
6172 if (!xcoff_find_tc0 (abfd
, &flinfo
))
6175 /* We now know the position of everything in the file, except that
6176 we don't know the size of the symbol table and therefore we don't
6177 know where the string table starts. We just build the string
6178 table in memory as we go along. We process all the relocations
6179 for a single input file at once. */
6180 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6182 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
6184 if (p
->type
== bfd_indirect_link_order
6185 && p
->u
.indirect
.section
->owner
->xvec
== abfd
->xvec
)
6187 sub
= p
->u
.indirect
.section
->owner
;
6188 if (! sub
->output_has_begun
)
6190 if (! xcoff_link_input_bfd (&flinfo
, sub
))
6192 sub
->output_has_begun
= TRUE
;
6195 else if (p
->type
== bfd_section_reloc_link_order
6196 || p
->type
== bfd_symbol_reloc_link_order
)
6198 if (! xcoff_reloc_link_order (abfd
, &flinfo
, o
, p
))
6203 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
6209 /* Free up the buffers used by xcoff_link_input_bfd. */
6210 if (flinfo
.internal_syms
!= NULL
)
6212 free (flinfo
.internal_syms
);
6213 flinfo
.internal_syms
= NULL
;
6215 if (flinfo
.sym_indices
!= NULL
)
6217 free (flinfo
.sym_indices
);
6218 flinfo
.sym_indices
= NULL
;
6220 if (flinfo
.linenos
!= NULL
)
6222 free (flinfo
.linenos
);
6223 flinfo
.linenos
= NULL
;
6225 if (flinfo
.contents
!= NULL
)
6227 free (flinfo
.contents
);
6228 flinfo
.contents
= NULL
;
6230 if (flinfo
.external_relocs
!= NULL
)
6232 free (flinfo
.external_relocs
);
6233 flinfo
.external_relocs
= NULL
;
6236 /* The value of the last C_FILE symbol is supposed to be -1. Write
6238 if (flinfo
.last_file_index
!= -1)
6240 flinfo
.last_file
.n_value
= -(bfd_vma
) 1;
6241 bfd_coff_swap_sym_out (abfd
, (void *) &flinfo
.last_file
,
6242 (void *) flinfo
.outsyms
);
6243 pos
= obj_sym_filepos (abfd
) + flinfo
.last_file_index
* symesz
;
6244 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6245 || bfd_bwrite (flinfo
.outsyms
, symesz
, abfd
) != symesz
)
6249 /* Write out all the global symbols which do not come from XCOFF
6251 bfd_hash_traverse (&info
->hash
->table
, xcoff_write_global_symbol
, &flinfo
);
6253 if (flinfo
.outsyms
!= NULL
)
6255 free (flinfo
.outsyms
);
6256 flinfo
.outsyms
= NULL
;
6259 /* Now that we have written out all the global symbols, we know the
6260 symbol indices to use for relocs against them, and we can finally
6261 write out the relocs. */
6262 amt
= max_output_reloc_count
* relsz
;
6263 external_relocs
= bfd_malloc (amt
);
6264 if (external_relocs
== NULL
&& max_output_reloc_count
!= 0)
6267 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
6269 struct internal_reloc
*irel
;
6270 struct internal_reloc
*irelend
;
6271 struct xcoff_link_hash_entry
**rel_hash
;
6272 struct xcoff_toc_rel_hash
*toc_rel_hash
;
6274 bfd_size_type rel_size
;
6276 /* A stripped file has no relocs. */
6277 if (info
->strip
== strip_all
)
6283 if (o
->reloc_count
== 0)
6286 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6287 irelend
= irel
+ o
->reloc_count
;
6288 rel_hash
= flinfo
.section_info
[o
->target_index
].rel_hashes
;
6289 for (; irel
< irelend
; irel
++, rel_hash
++)
6291 if (*rel_hash
!= NULL
)
6293 if ((*rel_hash
)->indx
< 0)
6295 (*info
->callbacks
->unattached_reloc
)
6296 (info
, (*rel_hash
)->root
.root
.string
,
6297 NULL
, o
, irel
->r_vaddr
);
6298 (*rel_hash
)->indx
= 0;
6300 irel
->r_symndx
= (*rel_hash
)->indx
;
6304 for (toc_rel_hash
= flinfo
.section_info
[o
->target_index
].toc_rel_hashes
;
6305 toc_rel_hash
!= NULL
;
6306 toc_rel_hash
= toc_rel_hash
->next
)
6308 if (toc_rel_hash
->h
->u
.toc_indx
< 0)
6310 (*info
->callbacks
->unattached_reloc
)
6311 (info
, toc_rel_hash
->h
->root
.root
.string
,
6312 NULL
, o
, toc_rel_hash
->rel
->r_vaddr
);
6313 toc_rel_hash
->h
->u
.toc_indx
= 0;
6315 toc_rel_hash
->rel
->r_symndx
= toc_rel_hash
->h
->u
.toc_indx
;
6318 /* XCOFF requires that the relocs be sorted by address. We tend
6319 to produce them in the order in which their containing csects
6320 appear in the symbol table, which is not necessarily by
6321 address. So we sort them here. There may be a better way to
6323 qsort ((void *) flinfo
.section_info
[o
->target_index
].relocs
,
6324 o
->reloc_count
, sizeof (struct internal_reloc
),
6327 irel
= flinfo
.section_info
[o
->target_index
].relocs
;
6328 irelend
= irel
+ o
->reloc_count
;
6329 erel
= external_relocs
;
6330 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
6331 bfd_coff_swap_reloc_out (abfd
, (void *) irel
, (void *) erel
);
6333 rel_size
= relsz
* o
->reloc_count
;
6334 if (bfd_seek (abfd
, o
->rel_filepos
, SEEK_SET
) != 0
6335 || bfd_bwrite ((void *) external_relocs
, rel_size
, abfd
) != rel_size
)
6339 if (external_relocs
!= NULL
)
6341 free (external_relocs
);
6342 external_relocs
= NULL
;
6345 /* Free up the section information. */
6346 if (flinfo
.section_info
!= NULL
)
6350 for (i
= 0; i
< abfd
->section_count
; i
++)
6352 if (flinfo
.section_info
[i
].relocs
!= NULL
)
6353 free (flinfo
.section_info
[i
].relocs
);
6354 if (flinfo
.section_info
[i
].rel_hashes
!= NULL
)
6355 free (flinfo
.section_info
[i
].rel_hashes
);
6357 free (flinfo
.section_info
);
6358 flinfo
.section_info
= NULL
;
6361 /* Write out the loader section contents. */
6362 o
= xcoff_hash_table (info
)->loader_section
;
6365 BFD_ASSERT ((bfd_byte
*) flinfo
.ldrel
6366 == (xcoff_hash_table (info
)->loader_section
->contents
6367 + xcoff_hash_table (info
)->ldhdr
.l_impoff
));
6368 if (!bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6369 (file_ptr
) o
->output_offset
, o
->size
))
6373 /* Write out the magic sections. */
6374 o
= xcoff_hash_table (info
)->linkage_section
;
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
;
6382 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6383 (file_ptr
) o
->output_offset
,
6386 o
= xcoff_hash_table (info
)->descriptor_section
;
6388 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
6389 (file_ptr
) o
->output_offset
,
6393 /* Write out the string table. */
6394 pos
= obj_sym_filepos (abfd
) + obj_raw_syment_count (abfd
) * symesz
;
6395 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6398 _bfd_stringtab_size (flinfo
.strtab
) + STRING_SIZE_SIZE
,
6400 amt
= STRING_SIZE_SIZE
;
6401 if (bfd_bwrite (strbuf
, amt
, abfd
) != amt
)
6403 if (! _bfd_stringtab_emit (abfd
, flinfo
.strtab
))
6406 _bfd_stringtab_free (flinfo
.strtab
);
6408 /* Write out the debugging string table. */
6409 o
= xcoff_hash_table (info
)->debug_section
;
6412 struct bfd_strtab_hash
*debug_strtab
;
6414 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
6415 BFD_ASSERT (o
->output_section
->size
- o
->output_offset
6416 >= _bfd_stringtab_size (debug_strtab
));
6417 pos
= o
->output_section
->filepos
+ o
->output_offset
;
6418 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0)
6420 if (! _bfd_stringtab_emit (abfd
, debug_strtab
))
6424 /* Setting symcount to 0 will cause write_object_contents to
6425 not try to write out the symbols. */
6431 if (flinfo
.strtab
!= NULL
)
6432 _bfd_stringtab_free (flinfo
.strtab
);
6434 if (flinfo
.section_info
!= NULL
)
6438 for (i
= 0; i
< abfd
->section_count
; i
++)
6440 if (flinfo
.section_info
[i
].relocs
!= NULL
)
6441 free (flinfo
.section_info
[i
].relocs
);
6442 if (flinfo
.section_info
[i
].rel_hashes
!= NULL
)
6443 free (flinfo
.section_info
[i
].rel_hashes
);
6445 free (flinfo
.section_info
);
6448 if (flinfo
.internal_syms
!= NULL
)
6449 free (flinfo
.internal_syms
);
6450 if (flinfo
.sym_indices
!= NULL
)
6451 free (flinfo
.sym_indices
);
6452 if (flinfo
.outsyms
!= NULL
)
6453 free (flinfo
.outsyms
);
6454 if (flinfo
.linenos
!= NULL
)
6455 free (flinfo
.linenos
);
6456 if (flinfo
.contents
!= NULL
)
6457 free (flinfo
.contents
);
6458 if (flinfo
.external_relocs
!= NULL
)
6459 free (flinfo
.external_relocs
);
6460 if (external_relocs
!= NULL
)
6461 free (external_relocs
);