1 /* POWER/PowerPC XCOFF linker support.
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "coff/internal.h"
27 #include "coff/xcoff.h"
31 /* This file holds the XCOFF linker code. */
33 #define STRING_SIZE_SIZE (4)
35 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
36 This flag will only be used on input sections. */
38 #define SEC_MARK (SEC_ROM)
40 /* The list of import files. */
42 struct xcoff_import_file
44 /* The next entry in the list. */
45 struct xcoff_import_file *next;
50 /* The member name. */
54 /* Information we keep for each section in the output file during the
57 struct xcoff_link_section_info
59 /* The relocs to be output. */
60 struct internal_reloc *relocs;
61 /* For each reloc against a global symbol whose index was not known
62 when the reloc was handled, the global hash table entry. */
63 struct xcoff_link_hash_entry **rel_hashes;
64 /* If there is a TOC relative reloc against a global symbol, and the
65 index of the TOC symbol is not known when the reloc was handled,
66 an entry is added to this linked list. This is not an array,
67 like rel_hashes, because this case is quite uncommon. */
68 struct xcoff_toc_rel_hash {
69 struct xcoff_toc_rel_hash *next;
70 struct xcoff_link_hash_entry *h;
71 struct internal_reloc *rel;
75 /* Information that we pass around while doing the final link step. */
77 struct xcoff_final_link_info
79 /* General link information. */
80 struct bfd_link_info *info;
83 /* Hash table for long symbol names. */
84 struct bfd_strtab_hash *strtab;
85 /* Array of information kept for each output section, indexed by the
86 target_index field. */
87 struct xcoff_link_section_info *section_info;
88 /* Symbol index of last C_FILE symbol (-1 if none). */
90 /* Contents of last C_FILE symbol. */
91 struct internal_syment last_file;
92 /* Symbol index of TOC symbol. */
94 /* Start of .loader symbols. */
96 /* Next .loader reloc to swap out. */
98 /* File position of start of line numbers. */
99 file_ptr line_filepos;
100 /* Buffer large enough to hold swapped symbols of any input file. */
101 struct internal_syment *internal_syms;
102 /* Buffer large enough to hold output indices of symbols of any
105 /* Buffer large enough to hold output symbols for any input file. */
107 /* Buffer large enough to hold external line numbers for any input
110 /* Buffer large enough to hold any input section. */
112 /* Buffer large enough to hold external relocs of any input section. */
113 bfd_byte *external_relocs;
116 static struct bfd_hash_entry *xcoff_link_hash_newfunc
117 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
118 static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *));
119 static struct internal_reloc *xcoff_read_internal_relocs
120 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
121 struct internal_reloc *));
122 static boolean xcoff_link_add_object_symbols
123 PARAMS ((bfd *, struct bfd_link_info *));
124 static boolean xcoff_link_check_archive_element
125 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
126 static boolean xcoff_link_check_ar_symbols
127 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
128 static boolean xcoff_link_check_dynamic_ar_symbols
129 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
130 static bfd_size_type xcoff_find_reloc
131 PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
132 static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
133 static boolean xcoff_link_add_dynamic_symbols
134 PARAMS ((bfd *, struct bfd_link_info *));
135 static boolean xcoff_mark_symbol
136 PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *));
137 static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
138 static void xcoff_sweep PARAMS ((struct bfd_link_info *));
139 static boolean xcoff_build_ldsyms
140 PARAMS ((struct xcoff_link_hash_entry *, PTR));
141 static boolean xcoff_link_input_bfd
142 PARAMS ((struct xcoff_final_link_info *, bfd *));
143 static boolean xcoff_write_global_symbol
144 PARAMS ((struct xcoff_link_hash_entry *, PTR));
145 static boolean xcoff_reloc_link_order
146 PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
147 struct bfd_link_order *));
148 static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
151 /* Routines to read XCOFF dynamic information. This don't really
152 belong here, but we already have the ldsym manipulation routines
155 /* Read the contents of a section. */
158 xcoff_get_section_contents (abfd, sec)
163 if (coff_section_data (abfd, sec) == NULL)
165 bfd_size_type amt = sizeof (struct coff_section_tdata);
166 sec->used_by_bfd = bfd_zalloc (abfd, amt);
167 if (sec->used_by_bfd == NULL)
171 if (coff_section_data (abfd, sec)->contents == NULL)
173 coff_section_data (abfd, sec)->contents = ((bfd_byte *)
174 bfd_malloc (sec->_raw_size));
175 if (coff_section_data (abfd, sec)->contents == NULL)
178 if (! bfd_get_section_contents (abfd, sec,
179 coff_section_data (abfd, sec)->contents,
180 (file_ptr) 0, sec->_raw_size))
187 /* Get the size required to hold the dynamic symbols. */
190 _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
195 struct internal_ldhdr ldhdr;
197 if ((abfd->flags & DYNAMIC) == 0)
199 bfd_set_error (bfd_error_invalid_operation);
203 lsec = bfd_get_section_by_name (abfd, ".loader");
206 bfd_set_error (bfd_error_no_symbols);
210 if (! xcoff_get_section_contents (abfd, lsec))
212 contents = coff_section_data (abfd, lsec)->contents;
214 bfd_xcoff_swap_ldhdr_in (abfd, (PTR) contents, &ldhdr);
216 return (ldhdr.l_nsyms + 1) * sizeof (asymbol *);
219 /* Get the dynamic symbols. */
222 _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
228 struct internal_ldhdr ldhdr;
230 bfd_byte *elsym, *elsymend;
231 coff_symbol_type *symbuf;
233 if ((abfd->flags & DYNAMIC) == 0)
235 bfd_set_error (bfd_error_invalid_operation);
239 lsec = bfd_get_section_by_name (abfd, ".loader");
242 bfd_set_error (bfd_error_no_symbols);
246 if (! xcoff_get_section_contents (abfd, lsec))
248 contents = coff_section_data (abfd, lsec)->contents;
250 coff_section_data (abfd, lsec)->keep_contents = true;
252 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
254 strings = (char *) contents + ldhdr.l_stoff;
256 symbuf = ((coff_symbol_type *)
257 bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type)));
261 elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr);
263 elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd);
264 for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd), symbuf++, psyms++)
266 struct internal_ldsym ldsym;
268 bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
270 symbuf->symbol.the_bfd = abfd;
272 if (ldsym._l._l_l._l_zeroes == 0)
273 symbuf->symbol.name = strings + ldsym._l._l_l._l_offset;
278 c = bfd_alloc (abfd, (bfd_size_type) SYMNMLEN + 1);
281 memcpy (c, ldsym._l._l_name, SYMNMLEN);
283 symbuf->symbol.name = c;
286 if (ldsym.l_smclas == XMC_XO)
287 symbuf->symbol.section = bfd_abs_section_ptr;
289 symbuf->symbol.section = coff_section_from_bfd_index (abfd,
291 symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma;
293 symbuf->symbol.flags = BSF_NO_FLAGS;
294 if ((ldsym.l_smtype & L_EXPORT) != 0)
295 symbuf->symbol.flags |= BSF_GLOBAL;
297 /* FIXME: We have no way to record the other information stored
298 with the loader symbol. */
300 *psyms = (asymbol *) symbuf;
305 return ldhdr.l_nsyms;
308 /* Get the size required to hold the dynamic relocs. */
311 _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
316 struct internal_ldhdr ldhdr;
318 if ((abfd->flags & DYNAMIC) == 0)
320 bfd_set_error (bfd_error_invalid_operation);
324 lsec = bfd_get_section_by_name (abfd, ".loader");
327 bfd_set_error (bfd_error_no_symbols);
331 if (! xcoff_get_section_contents (abfd, lsec))
333 contents = coff_section_data (abfd, lsec)->contents;
335 bfd_xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
337 return (ldhdr.l_nreloc + 1) * sizeof (arelent *);
340 /* Get the dynamic relocs. */
343 _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
350 struct internal_ldhdr ldhdr;
352 bfd_byte *elrel, *elrelend;
354 if ((abfd->flags & DYNAMIC) == 0)
356 bfd_set_error (bfd_error_invalid_operation);
360 lsec = bfd_get_section_by_name (abfd, ".loader");
363 bfd_set_error (bfd_error_no_symbols);
367 if (! xcoff_get_section_contents (abfd, lsec))
369 contents = coff_section_data (abfd, lsec)->contents;
371 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
373 relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent));
377 elrel = contents + bfd_xcoff_loader_reloc_offset(abfd, &ldhdr);
379 elrelend = elrel + ldhdr.l_nreloc * bfd_xcoff_ldrelsz(abfd);
380 for (; elrel < elrelend; elrel += bfd_xcoff_ldrelsz(abfd), relbuf++,
383 struct internal_ldrel ldrel;
385 bfd_xcoff_swap_ldrel_in (abfd, elrel, &ldrel);
387 if (ldrel.l_symndx >= 3)
388 relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3);
394 switch (ldrel.l_symndx)
410 sec = bfd_get_section_by_name (abfd, name);
413 bfd_set_error (bfd_error_bad_value);
417 relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
420 relbuf->address = ldrel.l_vaddr;
423 /* Most dynamic relocs have the same type. FIXME: This is only
424 correct if ldrel.l_rtype == 0. In other cases, we should use
425 a different howto. */
426 relbuf->howto = bfd_xcoff_dynamic_reloc_howto(abfd);
428 /* FIXME: We have no way to record the l_rsecnm field. */
435 return ldhdr.l_nreloc;
438 /* Routine to create an entry in an XCOFF link hash table. */
440 static struct bfd_hash_entry *
441 xcoff_link_hash_newfunc (entry, table, string)
442 struct bfd_hash_entry *entry;
443 struct bfd_hash_table *table;
446 struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry;
448 /* Allocate the structure if it has not already been allocated by a
450 if (ret == (struct xcoff_link_hash_entry *) NULL)
451 ret = ((struct xcoff_link_hash_entry *)
452 bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
453 if (ret == (struct xcoff_link_hash_entry *) NULL)
454 return (struct bfd_hash_entry *) ret;
456 /* Call the allocation method of the superclass. */
457 ret = ((struct xcoff_link_hash_entry *)
458 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
462 /* Set local fields. */
464 ret->toc_section = NULL;
465 ret->u.toc_indx = -1;
466 ret->descriptor = NULL;
470 ret->smclas = XMC_UA;
473 return (struct bfd_hash_entry *) ret;
476 /* Create a XCOFF link hash table. */
478 struct bfd_link_hash_table *
479 _bfd_xcoff_bfd_link_hash_table_create (abfd)
482 struct xcoff_link_hash_table *ret;
483 bfd_size_type amt = sizeof (struct xcoff_link_hash_table);
485 ret = (struct xcoff_link_hash_table *) bfd_alloc (abfd, amt);
486 if (ret == (struct xcoff_link_hash_table *) NULL)
487 return (struct bfd_link_hash_table *) NULL;
488 if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
490 bfd_release (abfd, ret);
491 return (struct bfd_link_hash_table *) NULL;
494 ret->debug_strtab = _bfd_xcoff_stringtab_init ();
495 ret->debug_section = NULL;
496 ret->loader_section = NULL;
497 ret->ldrel_count = 0;
498 memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
499 ret->linkage_section = NULL;
500 ret->toc_section = NULL;
501 ret->descriptor_section = NULL;
506 memset (ret->special_sections, 0, sizeof ret->special_sections);
508 /* The linker will always generate a full a.out header. We need to
509 record that fact now, before the sizeof_headers routine could be
511 xcoff_data (abfd)->full_aouthdr = true;
517 /* Read internal relocs for an XCOFF csect. This is a wrapper around
518 _bfd_coff_read_internal_relocs which tries to take advantage of any
519 relocs which may have been cached for the enclosing section. */
521 static struct internal_reloc *
522 xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
523 require_internal, internal_relocs)
527 bfd_byte *external_relocs;
528 boolean require_internal;
529 struct internal_reloc *internal_relocs;
532 if (coff_section_data (abfd, sec) != NULL
533 && coff_section_data (abfd, sec)->relocs == NULL
534 && xcoff_section_data (abfd, sec) != NULL)
538 enclosing = xcoff_section_data (abfd, sec)->enclosing;
540 if (enclosing != NULL
541 && (coff_section_data (abfd, enclosing) == NULL
542 || coff_section_data (abfd, enclosing)->relocs == NULL)
544 && enclosing->reloc_count > 0)
546 if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
547 external_relocs, false,
548 (struct internal_reloc *) NULL)
553 if (enclosing != NULL
554 && coff_section_data (abfd, enclosing) != NULL
555 && coff_section_data (abfd, enclosing)->relocs != NULL)
559 off = ((sec->rel_filepos - enclosing->rel_filepos)
560 / bfd_coff_relsz (abfd));
562 if (! require_internal)
563 return coff_section_data (abfd, enclosing)->relocs + off;
564 memcpy (internal_relocs,
565 coff_section_data (abfd, enclosing)->relocs + off,
566 sec->reloc_count * sizeof (struct internal_reloc));
567 return internal_relocs;
571 return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
572 require_internal, internal_relocs);
575 /* Given an XCOFF BFD, add symbols to the global hash table as
579 _bfd_xcoff_bfd_link_add_symbols (abfd, info)
581 struct bfd_link_info *info;
584 switch (bfd_get_format (abfd))
587 return xcoff_link_add_object_symbols (abfd, info);
590 /* If the archive has a map, do the usual search. We then need
591 to check the archive for stripped dynamic objects, because
592 they will not appear in the archive map even though they
593 should, perhaps, be included. If the archive has no map, we
594 just consider each object file in turn, since that apparently
595 is what the AIX native linker does. */
596 if (bfd_has_map (abfd))
598 if (! (_bfd_generic_link_add_archive_symbols
599 (abfd, info, xcoff_link_check_archive_element)))
606 member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
607 while (member != NULL)
609 if (bfd_check_format (member, bfd_object)
610 && (! bfd_has_map (abfd)
611 || ((member->flags & DYNAMIC) != 0
612 && (member->flags & HAS_SYMS) == 0)))
616 if (! xcoff_link_check_archive_element (member, info, &needed))
619 member->archive_pass = -1;
621 member = bfd_openr_next_archived_file (abfd, member);
628 bfd_set_error (bfd_error_wrong_format);
633 /* Add symbols from an XCOFF object file. */
636 xcoff_link_add_object_symbols (abfd, info)
638 struct bfd_link_info *info;
641 if (! _bfd_coff_get_external_symbols (abfd))
643 if (! xcoff_link_add_symbols (abfd, info))
645 if (! info->keep_memory)
647 if (! _bfd_coff_free_symbols (abfd))
653 /* Check a single archive element to see if we need to include it in
654 the link. *PNEEDED is set according to whether this element is
655 needed in the link or not. This is called via
656 _bfd_generic_link_add_archive_symbols. */
659 xcoff_link_check_archive_element (abfd, info, pneeded)
661 struct bfd_link_info *info;
665 if (! _bfd_coff_get_external_symbols (abfd))
668 if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
673 if (! xcoff_link_add_symbols (abfd, info))
677 if (! info->keep_memory || ! *pneeded)
679 if (! _bfd_coff_free_symbols (abfd))
686 /* Look through the symbols to see if this object file should be
687 included in the link. */
690 xcoff_link_check_ar_symbols (abfd, info, pneeded)
692 struct bfd_link_info *info;
695 bfd_size_type symesz;
701 if ((abfd->flags & DYNAMIC) != 0
702 && ! info->static_link
703 && info->hash->creator == abfd->xvec)
704 return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
706 symesz = bfd_coff_symesz (abfd);
707 esym = (bfd_byte *) obj_coff_external_syms (abfd);
708 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
709 while (esym < esym_end)
711 struct internal_syment sym;
713 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
715 if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
718 char buf[SYMNMLEN + 1];
719 struct bfd_link_hash_entry *h;
721 /* This symbol is externally visible, and is defined by this
724 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
728 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
730 /* We are only interested in symbols that are currently
731 undefined. If a symbol is currently known to be common,
732 XCOFF linkers do not bring in an object file which
733 defines it. We also don't bring in symbols to satisfy
734 undefined references in shared objects. */
735 if (h != (struct bfd_link_hash_entry *) NULL
736 && h->type == bfd_link_hash_undefined
737 && (info->hash->creator != abfd->xvec
738 || (((struct xcoff_link_hash_entry *) h)->flags
739 & XCOFF_DEF_DYNAMIC) == 0))
741 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
748 esym += (sym.n_numaux + 1) * symesz;
751 /* We do not need this object file. */
755 /* Look through the loader symbols to see if this dynamic object
756 should be included in the link. The native linker uses the loader
757 symbols, not the normal symbol table, so we do too. */
760 xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
762 struct bfd_link_info *info;
767 struct internal_ldhdr ldhdr;
769 bfd_byte *elsym, *elsymend;
773 lsec = bfd_get_section_by_name (abfd, ".loader");
776 /* There are no symbols, so don't try to include it. */
780 if (! xcoff_get_section_contents (abfd, lsec))
782 contents = coff_section_data (abfd, lsec)->contents;
784 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
786 strings = (char *) contents + ldhdr.l_stoff;
788 elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr);
790 elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd);
791 for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd))
793 struct internal_ldsym ldsym;
794 char nambuf[SYMNMLEN + 1];
796 struct bfd_link_hash_entry *h;
798 bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
800 /* We are only interested in exported symbols. */
801 if ((ldsym.l_smtype & L_EXPORT) == 0)
804 if (ldsym._l._l_l._l_zeroes == 0)
805 name = strings + ldsym._l._l_l._l_offset;
808 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
809 nambuf[SYMNMLEN] = '\0';
813 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
815 /* We are only interested in symbols that are currently
816 undefined. At this point we know that we are using an XCOFF
819 && h->type == bfd_link_hash_undefined
820 && (((struct xcoff_link_hash_entry *) h)->flags
821 & XCOFF_DEF_DYNAMIC) == 0)
823 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
830 /* We do not need this shared object. */
832 if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
834 free (coff_section_data (abfd, lsec)->contents);
835 coff_section_data (abfd, lsec)->contents = NULL;
841 /* Returns the index of reloc in RELOCS with the least address greater
842 than or equal to ADDRESS. The relocs are sorted by address. */
845 xcoff_find_reloc (relocs, count, address)
846 struct internal_reloc *relocs;
850 bfd_size_type min, max, this;
854 if (count == 1 && relocs[0].r_vaddr < address)
863 /* Do a binary search over (min,max]. */
864 while (min + 1 < max)
868 this = (max + min) / 2;
869 raddr = relocs[this].r_vaddr;
872 else if (raddr < address)
881 if (relocs[min].r_vaddr < address)
885 && relocs[min - 1].r_vaddr == address)
892 /* xcoff_link_create_extra_sections
894 Takes care of creating the .loader, .gl, .ds, .debug and sections. */
897 xcoff_link_create_extra_sections(bfd * abfd, struct bfd_link_info *info)
900 boolean return_value = false;
902 if (info->hash->creator == abfd->xvec)
905 /* We need to build a .loader section, so we do it here. This
906 won't work if we're producing an XCOFF output file with no
907 XCOFF input files. FIXME. */
909 if (xcoff_hash_table (info)->loader_section == NULL)
913 lsec = bfd_make_section_anyway (abfd, ".loader");
918 xcoff_hash_table (info)->loader_section = lsec;
919 lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
922 /* Likewise for the linkage section. */
923 if (xcoff_hash_table (info)->linkage_section == NULL)
927 lsec = bfd_make_section_anyway (abfd, ".gl");
933 xcoff_hash_table (info)->linkage_section = lsec;
934 lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
936 lsec->alignment_power = 2;
939 /* Likewise for the TOC section. */
940 if (xcoff_hash_table (info)->toc_section == NULL)
944 tsec = bfd_make_section_anyway (abfd, ".tc");
950 xcoff_hash_table (info)->toc_section = tsec;
951 tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
953 tsec->alignment_power = 2;
956 /* Likewise for the descriptor section. */
957 if (xcoff_hash_table (info)->descriptor_section == NULL)
961 dsec = bfd_make_section_anyway (abfd, ".ds");
967 xcoff_hash_table (info)->descriptor_section = dsec;
968 dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
970 dsec->alignment_power = 2;
973 /* Likewise for the .debug section. */
974 if (xcoff_hash_table (info)->debug_section == NULL
975 && info->strip != strip_all)
979 dsec = bfd_make_section_anyway (abfd, ".debug");
984 xcoff_hash_table (info)->debug_section = dsec;
985 dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
996 /* Add all the symbols from an object file to the hash table.
998 XCOFF is a weird format. A normal XCOFF .o files will have three
999 COFF sections--.text, .data, and .bss--but each COFF section will
1000 contain many csects. These csects are described in the symbol
1001 table. From the linker's point of view, each csect must be
1002 considered a section in its own right. For example, a TOC entry is
1003 handled as a small XMC_TC csect. The linker must be able to merge
1004 different TOC entries together, which means that it must be able to
1005 extract the XMC_TC csects from the .data section of the input .o
1008 From the point of view of our linker, this is, of course, a hideous
1009 nightmare. We cope by actually creating sections for each csect,
1010 and discarding the original sections. We then have to handle the
1011 relocation entries carefully, since the only way to tell which
1012 csect they belong to is to examine the address. */
1015 xcoff_link_add_symbols (abfd, info)
1017 struct bfd_link_info *info;
1019 unsigned int n_tmask;
1020 unsigned int n_btshft;
1021 boolean default_copy;
1022 bfd_size_type symcount;
1023 struct xcoff_link_hash_entry **sym_hash;
1024 asection **csect_cache;
1025 bfd_size_type linesz;
1027 asection *last_real;
1030 unsigned int csect_index;
1031 asection *first_csect;
1032 bfd_size_type symesz;
1035 struct reloc_info_struct
1037 struct internal_reloc *relocs;
1040 } *reloc_info = NULL;
1043 keep_syms = obj_coff_keep_syms (abfd);
1045 if ((abfd->flags & DYNAMIC) != 0
1046 && ! info->static_link)
1048 if (! xcoff_link_add_dynamic_symbols (abfd, info))
1054 /* create the loader, toc, gl, ds and debug sections, if needed */
1055 if (false == xcoff_link_create_extra_sections(abfd, info))
1060 if ((abfd->flags & DYNAMIC) != 0
1061 && ! info->static_link)
1064 n_tmask = coff_data (abfd)->local_n_tmask;
1065 n_btshft = coff_data (abfd)->local_n_btshft;
1067 /* Define macros so that ISFCN, et. al., macros work correctly. */
1068 #define N_TMASK n_tmask
1069 #define N_BTSHFT n_btshft
1071 if (info->keep_memory)
1072 default_copy = false;
1074 default_copy = true;
1076 symcount = obj_raw_syment_count (abfd);
1078 /* We keep a list of the linker hash table entries that correspond
1079 to each external symbol. */
1080 amt = symcount * sizeof (struct xcoff_link_hash_entry *);
1081 sym_hash = (struct xcoff_link_hash_entry **) bfd_alloc (abfd, amt);
1082 if (sym_hash == NULL && symcount != 0)
1084 coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
1085 memset (sym_hash, 0, (size_t) amt);
1087 /* Because of the weird stuff we are doing with XCOFF csects, we can
1088 not easily determine which section a symbol is in, so we store
1089 the information in the tdata for the input file. */
1090 amt = symcount * sizeof (asection *);
1091 csect_cache = (asection **) bfd_alloc (abfd, amt);
1092 if (csect_cache == NULL && symcount != 0)
1094 xcoff_data (abfd)->csects = csect_cache;
1095 memset (csect_cache, 0, (size_t) amt);
1097 /* While splitting sections into csects, we need to assign the
1098 relocs correctly. The relocs and the csects must both be in
1099 order by VMA within a given section, so we handle this by
1100 scanning along the relocs as we process the csects. We index
1101 into reloc_info using the section target_index. */
1102 amt = abfd->section_count + 1;
1103 amt *= sizeof (struct reloc_info_struct);
1104 reloc_info = (struct reloc_info_struct *) bfd_malloc (amt);
1105 if (reloc_info == NULL)
1107 memset ((PTR) reloc_info, 0, (size_t) amt);
1109 /* Read in the relocs and line numbers for each section. */
1110 linesz = bfd_coff_linesz (abfd);
1112 for (o = abfd->sections; o != NULL; o = o->next)
1116 if ((o->flags & SEC_RELOC) != 0)
1119 reloc_info[o->target_index].relocs =
1120 xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL,
1121 false, (struct internal_reloc *) NULL);
1122 amt = o->reloc_count;
1123 amt *= sizeof (asection *);
1124 reloc_info[o->target_index].csects = (asection **) bfd_malloc (amt);
1125 if (reloc_info[o->target_index].csects == NULL)
1127 memset (reloc_info[o->target_index].csects, 0, (size_t) amt);
1131 if ((info->strip == strip_none || info->strip == strip_some)
1132 && o->lineno_count > 0)
1137 amt = linesz * o->lineno_count;
1138 linenos = (bfd_byte *) bfd_malloc (amt);
1139 if (linenos == NULL)
1141 reloc_info[o->target_index].linenos = linenos;
1142 if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
1143 || bfd_bread (linenos, amt, abfd) != amt)
1150 /* Don't let the linker relocation routines discard the symbols. */
1151 obj_coff_keep_syms (abfd) = true;
1157 symesz = bfd_coff_symesz (abfd);
1158 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
1159 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1160 esym_end = esym + symcount * symesz;
1162 while (esym < esym_end)
1164 struct internal_syment sym;
1165 union internal_auxent aux;
1167 char buf[SYMNMLEN + 1];
1172 struct xcoff_link_hash_entry *set_toc;
1174 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1176 /* In this pass we are only interested in symbols with csect
1178 if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
1182 Normally csect is a .pr, .rw etc. created in the loop
1183 If C_FILE or first time, handle special
1185 Advance esym, sym_hash, csect_hash ptr's
1186 Keep track of the last_symndx for the current file. */
1187 if (sym.n_sclass == C_FILE && csect != NULL)
1189 xcoff_section_data (abfd, csect)->last_symndx =
1191 - (bfd_byte *) obj_coff_external_syms (abfd))
1197 *csect_cache = csect;
1198 else if (first_csect == NULL || sym.n_sclass == C_FILE)
1199 *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
1201 *csect_cache = NULL;
1202 esym += (sym.n_numaux + 1) * symesz;
1203 sym_hash += sym.n_numaux + 1;
1204 csect_cache += sym.n_numaux + 1;
1209 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1214 /* If this symbol has line number information attached to it,
1215 and we're not stripping it, count the number of entries and
1216 add them to the count for this csect. In the final link pass
1217 we are going to attach line number information by symbol,
1218 rather than by section, in order to more easily handle
1219 garbage collection. */
1220 if ((info->strip == strip_none || info->strip == strip_some)
1223 && ISFCN (sym.n_type))
1226 union internal_auxent auxlin;
1228 bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
1229 sym.n_type, sym.n_sclass,
1230 0, sym.n_numaux, (PTR) &auxlin);
1232 if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
1234 asection *enclosing;
1235 bfd_signed_vma linoff;
1237 enclosing = xcoff_section_data (abfd, csect)->enclosing;
1238 if (enclosing == NULL)
1240 (*_bfd_error_handler)
1241 (_("%s: `%s' has line numbers but no enclosing section"),
1242 bfd_archive_filename (abfd), name);
1243 bfd_set_error (bfd_error_bad_value);
1246 linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
1247 - enclosing->line_filepos);
1248 /* explict cast to bfd_signed_vma for compiler */
1249 if (linoff < (bfd_signed_vma) (enclosing->lineno_count * linesz))
1251 struct internal_lineno lin;
1252 bfd_byte *linpstart;
1254 linpstart = (reloc_info[enclosing->target_index].linenos
1256 bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
1258 && ((bfd_size_type) lin.l_addr.l_symndx
1260 - (bfd_byte *) obj_coff_external_syms (abfd))
1263 bfd_byte *linpend, *linp;
1265 linpend = (reloc_info[enclosing->target_index].linenos
1266 + enclosing->lineno_count * linesz);
1267 for (linp = linpstart + linesz;
1271 bfd_coff_swap_lineno_in (abfd, (PTR) linp,
1273 if (lin.l_lnno == 0)
1276 csect->lineno_count += (linp - linpstart) / linesz;
1277 /* The setting of line_filepos will only be
1278 useful if all the line number entries for a
1279 csect are contiguous; this only matters for
1281 if (csect->line_filepos == 0)
1282 csect->line_filepos =
1283 auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
1289 /* Pick up the csect auxiliary information. */
1291 if (sym.n_numaux == 0)
1293 (*_bfd_error_handler)
1294 (_("%s: class %d symbol `%s' has no aux entries"),
1295 bfd_archive_filename (abfd), sym.n_sclass, name);
1296 bfd_set_error (bfd_error_bad_value);
1300 bfd_coff_swap_aux_in (abfd,
1301 (PTR) (esym + symesz * sym.n_numaux),
1302 sym.n_type, sym.n_sclass,
1303 sym.n_numaux - 1, sym.n_numaux,
1306 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
1316 (*_bfd_error_handler)
1317 (_("%s: symbol `%s' has unrecognized csect type %d"),
1318 bfd_archive_filename (abfd), name, smtyp);
1319 bfd_set_error (bfd_error_bad_value);
1323 /* This is an external reference. */
1324 if (sym.n_sclass == C_HIDEXT
1325 || sym.n_scnum != N_UNDEF
1326 || aux.x_csect.x_scnlen.l != 0)
1328 (*_bfd_error_handler)
1329 (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"),
1330 bfd_archive_filename (abfd), name, sym.n_sclass, sym.n_scnum,
1331 aux.x_csect.x_scnlen.l);
1332 bfd_set_error (bfd_error_bad_value);
1336 /* An XMC_XO external reference is actually a reference to
1337 an absolute location. */
1338 if (aux.x_csect.x_smclas != XMC_XO)
1339 section = bfd_und_section_ptr;
1342 section = bfd_abs_section_ptr;
1343 value = sym.n_value;
1348 /* This is a csect definition. */
1351 xcoff_section_data (abfd, csect)->last_symndx =
1352 ((esym - (bfd_byte *) obj_coff_external_syms (abfd)) / symesz);
1356 csect_index = -(unsigned) 1;
1358 /* When we see a TOC anchor, we record the TOC value. */
1359 if (aux.x_csect.x_smclas == XMC_TC0)
1361 if (sym.n_sclass != C_HIDEXT
1362 || aux.x_csect.x_scnlen.l != 0)
1364 (*_bfd_error_handler)
1365 (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"),
1366 bfd_archive_filename (abfd), name, sym.n_sclass,
1367 aux.x_csect.x_scnlen.l);
1368 bfd_set_error (bfd_error_bad_value);
1371 xcoff_data (abfd)->toc = sym.n_value;
1374 /* We must merge TOC entries for the same symbol. We can
1375 merge two TOC entries if they are both C_HIDEXT, they
1376 both have the same name, they are both 4 or 8 bytes long, and
1377 they both have a relocation table entry for an external
1378 symbol with the same name. Unfortunately, this means
1379 that we must look through the relocations. Ick.
1381 Logic for 32 bit vs 64 bit.
1382 32 bit has a csect length of 4 for TOC
1383 64 bit has a csect length of 8 for TOC
1385 The conditions to get past the if-check are not that bad.
1386 They are what is used to create the TOC csects in the first
1388 if (aux.x_csect.x_smclas == XMC_TC
1389 && sym.n_sclass == C_HIDEXT
1390 && info->hash->creator == abfd->xvec
1391 && ((bfd_xcoff_is_xcoff32 (abfd)
1392 && aux.x_csect.x_scnlen.l == 4)
1393 || (bfd_xcoff_is_xcoff64 (abfd)
1394 && aux.x_csect.x_scnlen.l == 8)))
1396 asection *enclosing;
1397 struct internal_reloc *relocs;
1398 bfd_size_type relindx;
1399 struct internal_reloc *rel;
1401 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1402 if (enclosing == NULL)
1405 relocs = reloc_info[enclosing->target_index].relocs;
1406 amt = enclosing->reloc_count;
1407 relindx = xcoff_find_reloc (relocs, amt, sym.n_value);
1408 rel = relocs + relindx;
1410 /* 32 bit R_POS r_size is 31
1411 64 bit R_POS r_size is 63 */
1412 if (relindx < enclosing->reloc_count
1413 && rel->r_vaddr == (bfd_vma) sym.n_value
1414 && rel->r_type == R_POS
1415 && ((bfd_xcoff_is_xcoff32 (abfd)
1416 && rel->r_size == 31)
1417 || (bfd_xcoff_is_xcoff64 (abfd)
1418 && rel->r_size == 63)))
1422 struct internal_syment relsym;
1424 erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
1425 + rel->r_symndx * symesz);
1426 bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
1427 if (relsym.n_sclass == C_EXT)
1429 const char *relname;
1430 char relbuf[SYMNMLEN + 1];
1432 struct xcoff_link_hash_entry *h;
1434 /* At this point we know that the TOC entry is
1435 for an externally visible symbol. */
1437 relname = _bfd_coff_internal_syment_name (abfd, &relsym,
1439 if (relname == NULL)
1442 /* We only merge TOC entries if the TC name is
1443 the same as the symbol name. This handles
1444 the normal case, but not common cases like
1445 SYM.P4 which gcc generates to store SYM + 4
1446 in the TOC. FIXME. */
1448 if (strcmp (name, relname) == 0)
1450 copy = (! info->keep_memory
1451 || relsym._n._n_n._n_zeroes != 0
1452 || relsym._n._n_n._n_offset == 0);
1453 h = xcoff_link_hash_lookup (xcoff_hash_table (info),
1454 relname, true, copy,
1459 /* At this point h->root.type could be
1460 bfd_link_hash_new. That should be OK,
1461 since we know for sure that we will come
1462 across this symbol as we step through the
1465 /* We store h in *sym_hash for the
1466 convenience of the relocate_section
1470 if (h->toc_section != NULL)
1472 asection **rel_csects;
1474 /* We already have a TOC entry for this
1475 symbol, so we can just ignore this
1478 reloc_info[enclosing->target_index].csects;
1479 rel_csects[relindx] = bfd_und_section_ptr;
1483 /* We are about to create a TOC entry for
1486 } /* merge toc reloc */
1493 asection *enclosing;
1495 /* We need to create a new section. We get the name from
1496 the csect storage mapping class, so that the linker can
1497 accumulate similar csects together. */
1499 csect = bfd_xcoff_create_csect_from_smclas(abfd, &aux, name);
1505 /* The enclosing section is the main section : .data, .text
1506 or .bss that the csect is coming from. */
1507 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1508 if (enclosing == NULL)
1511 if (! bfd_is_abs_section (enclosing)
1512 && ((bfd_vma) sym.n_value < enclosing->vma
1513 || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
1514 > enclosing->vma + enclosing->_raw_size)))
1516 (*_bfd_error_handler)
1517 (_("%s: csect `%s' not in enclosing section"),
1518 bfd_archive_filename (abfd), name);
1519 bfd_set_error (bfd_error_bad_value);
1522 csect->vma = sym.n_value;
1523 csect->filepos = (enclosing->filepos
1526 csect->_raw_size = aux.x_csect.x_scnlen.l;
1527 csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
1528 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1530 /* Record the enclosing section in the tdata for this new
1532 amt = sizeof (struct coff_section_tdata);
1533 csect->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
1534 if (csect->used_by_bfd == NULL)
1536 amt = sizeof (struct xcoff_section_tdata);
1537 coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt);
1538 if (coff_section_data (abfd, csect)->tdata == NULL)
1540 xcoff_section_data (abfd, csect)->enclosing = enclosing;
1541 xcoff_section_data (abfd, csect)->lineno_count =
1542 enclosing->lineno_count;
1544 if (enclosing->owner == abfd)
1546 struct internal_reloc *relocs;
1547 bfd_size_type relindx;
1548 struct internal_reloc *rel;
1549 asection **rel_csect;
1551 relocs = reloc_info[enclosing->target_index].relocs;
1552 amt = enclosing->reloc_count;
1553 relindx = xcoff_find_reloc (relocs, amt, csect->vma);
1555 rel = relocs + relindx;
1556 rel_csect = (reloc_info[enclosing->target_index].csects
1559 csect->rel_filepos = (enclosing->rel_filepos
1560 + relindx * bfd_coff_relsz (abfd));
1561 while (relindx < enclosing->reloc_count
1562 && *rel_csect == NULL
1563 && rel->r_vaddr < csect->vma + csect->_raw_size)
1567 csect->flags |= SEC_RELOC;
1568 ++csect->reloc_count;
1575 /* There are a number of other fields and section flags
1576 which we do not bother to set. */
1578 csect_index = ((esym
1579 - (bfd_byte *) obj_coff_external_syms (abfd))
1582 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1584 if (first_csect == NULL)
1585 first_csect = csect;
1587 /* If this symbol is C_EXT, we treat it as starting at the
1588 beginning of the newly created section. */
1589 if (sym.n_sclass == C_EXT)
1595 /* If this is a TOC section for a symbol, record it. */
1596 if (set_toc != NULL)
1597 set_toc->toc_section = csect;
1602 /* This is a label definition. The x_scnlen field is the
1603 symbol index of the csect. Usually the XTY_LD symbol will
1604 follow its appropriate XTY_SD symbol. The .set pseudo op can
1605 cause the XTY_LD to not follow the XTY_SD symbol. */
1610 if (aux.x_csect.x_scnlen.l < 0
1611 || (aux.x_csect.x_scnlen.l
1612 >= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
1616 section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
1618 || (section->flags & SEC_HAS_CONTENTS) == 0)
1623 (*_bfd_error_handler)
1624 (_("%s: misplaced XTY_LD `%s'"),
1625 bfd_archive_filename (abfd), name);
1626 bfd_set_error (bfd_error_bad_value);
1630 value = sym.n_value - csect->vma;
1635 /* This is an unitialized csect. We could base the name on
1636 the storage mapping class, but we don't bother except for
1637 an XMC_TD symbol. If this csect is externally visible,
1638 it is a common symbol. We put XMC_TD symbols in sections
1639 named .tocbss, and rely on the linker script to put that
1644 xcoff_section_data (abfd, csect)->last_symndx =
1646 - (bfd_byte *) obj_coff_external_syms (abfd))
1650 if (aux.x_csect.x_smclas == XMC_TD)
1652 /* The linker script puts the .td section in the data
1653 section after the .tc section. */
1654 csect = bfd_make_section_anyway (abfd, ".td");
1659 csect = bfd_make_section_anyway (abfd, ".bss");
1663 csect->vma = sym.n_value;
1664 csect->_raw_size = aux.x_csect.x_scnlen.l;
1665 csect->flags |= SEC_ALLOC;
1666 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1667 /* There are a number of other fields and section flags
1668 which we do not bother to set. */
1670 csect_index = ((esym
1671 - (bfd_byte *) obj_coff_external_syms (abfd))
1674 amt = sizeof (struct coff_section_tdata);
1675 csect->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
1676 if (csect->used_by_bfd == NULL)
1678 amt = sizeof (struct xcoff_section_tdata);
1679 coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt);
1680 if (coff_section_data (abfd, csect)->tdata == NULL)
1682 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1684 if (first_csect == NULL)
1685 first_csect = csect;
1687 if (sym.n_sclass == C_EXT)
1689 csect->flags |= SEC_IS_COMMON;
1690 csect->_raw_size = 0;
1692 value = aux.x_csect.x_scnlen.l;
1698 /* Check for magic symbol names. */
1699 if ((smtyp == XTY_SD || smtyp == XTY_CM)
1700 && aux.x_csect.x_smclas != XMC_TC
1701 && aux.x_csect.x_smclas != XMC_TD)
1708 if (strcmp (name, "_text") == 0)
1709 i = XCOFF_SPECIAL_SECTION_TEXT;
1710 else if (strcmp (name, "_etext") == 0)
1711 i = XCOFF_SPECIAL_SECTION_ETEXT;
1712 else if (strcmp (name, "_data") == 0)
1713 i = XCOFF_SPECIAL_SECTION_DATA;
1714 else if (strcmp (name, "_edata") == 0)
1715 i = XCOFF_SPECIAL_SECTION_EDATA;
1716 else if (strcmp (name, "_end") == 0)
1717 i = XCOFF_SPECIAL_SECTION_END;
1719 else if (name[0] == 'e' && strcmp (name, "end") == 0)
1721 i = XCOFF_SPECIAL_SECTION_END2;
1726 xcoff_hash_table (info)->special_sections[i] = csect;
1730 /* Now we have enough information to add the symbol to the
1731 linker hash table. */
1733 if (sym.n_sclass == C_EXT)
1737 BFD_ASSERT (section != NULL);
1739 /* We must copy the name into memory if we got it from the
1740 syment itself, rather than the string table. */
1741 copy = default_copy;
1742 if (sym._n._n_n._n_zeroes != 0
1743 || sym._n._n_n._n_offset == 0)
1746 /* The AIX linker appears to only detect multiple symbol
1747 definitions when there is a reference to the symbol. If
1748 a symbol is defined multiple times, and the only
1749 references are from the same object file, the AIX linker
1750 appears to permit it. It does not merge the different
1751 definitions, but handles them independently. On the
1752 other hand, if there is a reference, the linker reports
1755 This matters because the AIX <net/net_globals.h> header
1756 file actually defines an initialized array, so we have to
1757 actually permit that to work.
1759 Just to make matters even more confusing, the AIX linker
1760 appears to permit multiple symbol definitions whenever
1761 the second definition is in an archive rather than an
1762 object file. This may be a consequence of the manner in
1763 which it handles archives: I think it may load the entire
1764 archive in as separate csects, and then let garbage
1765 collection discard symbols.
1767 We also have to handle the case of statically linking a
1768 shared object, which will cause symbol redefinitions,
1769 although this is an easier case to detect. */
1771 if (info->hash->creator == abfd->xvec)
1773 if (! bfd_is_und_section (section))
1774 *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
1775 name, true, copy, false);
1777 *sym_hash = ((struct xcoff_link_hash_entry *)
1778 bfd_wrapped_link_hash_lookup (abfd, info, name,
1779 true, copy, false));
1780 if (*sym_hash == NULL)
1782 if (((*sym_hash)->root.type == bfd_link_hash_defined
1783 || (*sym_hash)->root.type == bfd_link_hash_defweak)
1784 && ! bfd_is_und_section (section)
1785 && ! bfd_is_com_section (section))
1787 /* This is a second definition of a defined symbol. */
1788 if ((abfd->flags & DYNAMIC) != 0
1789 && ((*sym_hash)->smclas != XMC_GL
1790 || aux.x_csect.x_smclas == XMC_GL
1791 || ((*sym_hash)->root.u.def.section->owner->flags
1794 /* The new symbol is from a shared library, and
1795 either the existing symbol is not global
1796 linkage code or this symbol is global linkage
1797 code. If the existing symbol is global
1798 linkage code and the new symbol is not, then
1799 we want to use the new symbol. */
1800 section = bfd_und_section_ptr;
1803 else if (((*sym_hash)->root.u.def.section->owner->flags
1806 /* The existing symbol is from a shared library.
1808 (*sym_hash)->root.type = bfd_link_hash_undefined;
1809 (*sym_hash)->root.u.undef.abfd =
1810 (*sym_hash)->root.u.def.section->owner;
1812 else if (abfd->my_archive != NULL)
1814 /* This is a redefinition in an object contained
1815 in an archive. Just ignore it. See the
1817 section = bfd_und_section_ptr;
1820 else if ((*sym_hash)->root.next != NULL
1821 || info->hash->undefs_tail == &(*sym_hash)->root)
1823 /* This symbol has been referenced. In this
1824 case, we just continue and permit the
1825 multiple definition error. See the comment
1826 above about the behaviour of the AIX linker. */
1828 else if ((*sym_hash)->smclas == aux.x_csect.x_smclas)
1830 /* The symbols are both csects of the same
1831 class. There is at least a chance that this
1832 is a semi-legitimate redefinition. */
1833 section = bfd_und_section_ptr;
1835 (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED;
1838 else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0
1839 && ((*sym_hash)->root.type == bfd_link_hash_defined
1840 || (*sym_hash)->root.type == bfd_link_hash_defweak)
1841 && (bfd_is_und_section (section)
1842 || bfd_is_com_section (section)))
1844 /* This is a reference to a multiply defined symbol.
1845 Report the error now. See the comment above
1846 about the behaviour of the AIX linker. We could
1847 also do this with warning symbols, but I'm not
1848 sure the XCOFF linker is wholly prepared to
1849 handle them, and that would only be a warning,
1851 if (! ((*info->callbacks->multiple_definition)
1852 (info, (*sym_hash)->root.root.string,
1853 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0,
1854 (*sym_hash)->root.u.def.section->owner,
1855 (*sym_hash)->root.u.def.section,
1856 (*sym_hash)->root.u.def.value)))
1858 /* Try not to give this error too many times. */
1859 (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED;
1863 /* _bfd_generic_link_add_one_symbol may call the linker to
1864 generate an error message, and the linker may try to read
1865 the symbol table to give a good error. Right now, the
1866 line numbers are in an inconsistent state, since they are
1867 counted both in the real sections and in the new csects.
1868 We need to leave the count in the real sections so that
1869 the linker can report the line number of the error
1870 correctly, so temporarily clobber the link to the csects
1871 so that the linker will not try to read the line numbers
1872 a second time from the csects. */
1873 BFD_ASSERT (last_real->next == first_csect);
1874 last_real->next = NULL;
1875 if (! (_bfd_generic_link_add_one_symbol
1876 (info, abfd, name, flags, section, value,
1877 (const char *) NULL, copy, true,
1878 (struct bfd_link_hash_entry **) sym_hash)))
1880 last_real->next = first_csect;
1882 if (smtyp == XTY_CM)
1884 if ((*sym_hash)->root.type != bfd_link_hash_common
1885 || (*sym_hash)->root.u.c.p->section != csect)
1887 /* We don't need the common csect we just created. */
1888 csect->_raw_size = 0;
1892 (*sym_hash)->root.u.c.p->alignment_power
1893 = csect->alignment_power;
1897 if (info->hash->creator == abfd->xvec)
1901 if (smtyp == XTY_ER || smtyp == XTY_CM)
1902 flag = XCOFF_REF_REGULAR;
1904 flag = XCOFF_DEF_REGULAR;
1905 (*sym_hash)->flags |= flag;
1907 if ((*sym_hash)->smclas == XMC_UA
1908 || flag == XCOFF_DEF_REGULAR)
1909 (*sym_hash)->smclas = aux.x_csect.x_smclas;
1913 *csect_cache = csect;
1915 esym += (sym.n_numaux + 1) * symesz;
1916 sym_hash += sym.n_numaux + 1;
1917 csect_cache += sym.n_numaux + 1;
1920 BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
1922 /* Make sure that we have seen all the relocs. */
1923 for (o = abfd->sections; o != first_csect; o = o->next)
1925 /* Reset the section size and the line number count, since the
1926 data is now attached to the csects. Don't reset the size of
1927 the .debug section, since we need to read it below in
1928 bfd_xcoff_size_dynamic_sections. */
1929 if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
1931 o->lineno_count = 0;
1933 if ((o->flags & SEC_RELOC) != 0)
1936 struct internal_reloc *rel;
1937 asection **rel_csect;
1939 rel = reloc_info[o->target_index].relocs;
1940 rel_csect = reloc_info[o->target_index].csects;
1942 for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
1945 if (*rel_csect == NULL)
1947 (*_bfd_error_handler)
1948 (_("%s: reloc %s:%d not in csect"),
1949 bfd_archive_filename (abfd), o->name, i);
1950 bfd_set_error (bfd_error_bad_value);
1954 /* We identify all symbols which are called, so that we
1955 can create glue code for calls to functions imported
1956 from dynamic objects. */
1957 if (info->hash->creator == abfd->xvec
1958 && *rel_csect != bfd_und_section_ptr
1959 && (rel->r_type == R_BR
1960 || rel->r_type == R_RBR)
1961 && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
1963 struct xcoff_link_hash_entry *h;
1965 h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
1966 h->flags |= XCOFF_CALLED;
1967 /* If the symbol name starts with a period, it is
1968 the code of a function. If the symbol is
1969 currently undefined, then add an undefined symbol
1970 for the function descriptor. This should do no
1971 harm, because any regular object that defines the
1972 function should also define the function
1973 descriptor. It helps, because it means that we
1974 will identify the function descriptor with a
1975 dynamic object if a dynamic object defines it. */
1976 if (h->root.root.string[0] == '.'
1977 && h->descriptor == NULL)
1979 struct xcoff_link_hash_entry *hds;
1981 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
1982 h->root.root.string + 1,
1986 if (hds->root.type == bfd_link_hash_new)
1988 if (! (_bfd_generic_link_add_one_symbol
1989 (info, abfd, hds->root.root.string,
1990 (flagword) 0, bfd_und_section_ptr,
1991 (bfd_vma) 0, (const char *) NULL, false,
1993 (struct bfd_link_hash_entry **) &hds)))
1996 hds->flags |= XCOFF_DESCRIPTOR;
1997 BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
1998 && (h->flags & XCOFF_DESCRIPTOR) == 0);
1999 hds->descriptor = h;
2000 h->descriptor = hds;
2005 free (reloc_info[o->target_index].csects);
2006 reloc_info[o->target_index].csects = NULL;
2008 /* Reset SEC_RELOC and the reloc_count, since the reloc
2009 information is now attached to the csects. */
2010 o->flags &=~ SEC_RELOC;
2013 /* If we are not keeping memory, free the reloc information. */
2014 if (! info->keep_memory
2015 && coff_section_data (abfd, o) != NULL
2016 && coff_section_data (abfd, o)->relocs != NULL
2017 && ! coff_section_data (abfd, o)->keep_relocs)
2019 free (coff_section_data (abfd, o)->relocs);
2020 coff_section_data (abfd, o)->relocs = NULL;
2024 /* Free up the line numbers. FIXME: We could cache these
2025 somewhere for the final link, to avoid reading them again. */
2026 if (reloc_info[o->target_index].linenos != NULL)
2028 free (reloc_info[o->target_index].linenos);
2029 reloc_info[o->target_index].linenos = NULL;
2035 obj_coff_keep_syms (abfd) = keep_syms;
2040 if (reloc_info != NULL)
2042 for (o = abfd->sections; o != NULL; o = o->next)
2044 if (reloc_info[o->target_index].csects != NULL)
2045 free (reloc_info[o->target_index].csects);
2046 if (reloc_info[o->target_index].linenos != NULL)
2047 free (reloc_info[o->target_index].linenos);
2051 obj_coff_keep_syms (abfd) = keep_syms;
2058 /* This function is used to add symbols from a dynamic object to the
2059 global symbol table. */
2062 xcoff_link_add_dynamic_symbols (abfd, info)
2064 struct bfd_link_info *info;
2068 struct internal_ldhdr ldhdr;
2069 const char *strings;
2070 bfd_byte *elsym, *elsymend;
2071 struct xcoff_import_file *n;
2076 struct xcoff_import_file **pp;
2078 /* We can only handle a dynamic object if we are generating an XCOFF
2080 if (info->hash->creator != abfd->xvec)
2082 (*_bfd_error_handler)
2083 (_("%s: XCOFF shared object when not producing XCOFF output"),
2084 bfd_get_filename (abfd));
2085 bfd_set_error (bfd_error_invalid_operation);
2089 /* The symbols we use from a dynamic object are not the symbols in
2090 the normal symbol table, but, rather, the symbols in the export
2091 table. If there is a global symbol in a dynamic object which is
2092 not in the export table, the loader will not be able to find it,
2093 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
2094 libc.a has symbols in the export table which are not in the
2097 /* Read in the .loader section. FIXME: We should really use the
2098 o_snloader field in the a.out header, rather than grabbing the
2100 lsec = bfd_get_section_by_name (abfd, ".loader");
2103 (*_bfd_error_handler)
2104 (_("%s: dynamic object with no .loader section"),
2105 bfd_get_filename (abfd));
2106 bfd_set_error (bfd_error_no_symbols);
2111 if (! xcoff_get_section_contents (abfd, lsec))
2113 contents = coff_section_data (abfd, lsec)->contents;
2115 /* Remove the sections from this object, so that they do not get
2116 included in the link. */
2117 bfd_section_list_clear (abfd);
2119 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
2121 strings = (char *) contents + ldhdr.l_stoff;
2123 elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr);
2125 elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd);
2127 for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd))
2129 struct internal_ldsym ldsym;
2130 char nambuf[SYMNMLEN + 1];
2132 struct xcoff_link_hash_entry *h;
2134 bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
2136 /* We are only interested in exported symbols. */
2137 if ((ldsym.l_smtype & L_EXPORT) == 0)
2140 if (ldsym._l._l_l._l_zeroes == 0)
2141 name = strings + ldsym._l._l_l._l_offset;
2144 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
2145 nambuf[SYMNMLEN] = '\0';
2149 /* Normally we could not call xcoff_link_hash_lookup in an add
2150 symbols routine, since we might not be using an XCOFF hash
2151 table. However, we verified above that we are using an XCOFF
2154 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
2159 h->flags |= XCOFF_DEF_DYNAMIC;
2161 /* If the symbol is undefined, and the BFD it was found in is
2162 not a dynamic object, change the BFD to this dynamic object,
2163 so that we can get the correct import file ID. */
2164 if ((h->root.type == bfd_link_hash_undefined
2165 || h->root.type == bfd_link_hash_undefweak)
2166 && (h->root.u.undef.abfd == NULL
2167 || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
2168 h->root.u.undef.abfd = abfd;
2170 if (h->root.type == bfd_link_hash_new)
2172 h->root.type = bfd_link_hash_undefined;
2173 h->root.u.undef.abfd = abfd;
2174 /* We do not want to add this to the undefined symbol list. */
2177 if (h->smclas == XMC_UA
2178 || h->root.type == bfd_link_hash_undefined
2179 || h->root.type == bfd_link_hash_undefweak)
2180 h->smclas = ldsym.l_smclas;
2182 /* Unless this is an XMC_XO symbol, we don't bother to actually
2183 define it, since we don't have a section to put it in anyhow.
2184 Instead, the relocation routines handle the DEF_DYNAMIC flag
2187 if (h->smclas == XMC_XO
2188 && (h->root.type == bfd_link_hash_undefined
2189 || h->root.type == bfd_link_hash_undefweak))
2191 /* This symbol has an absolute value. */
2192 h->root.type = bfd_link_hash_defined;
2193 h->root.u.def.section = bfd_abs_section_ptr;
2194 h->root.u.def.value = ldsym.l_value;
2197 /* If this symbol defines a function descriptor, then it
2198 implicitly defines the function code as well. */
2199 if (h->smclas == XMC_DS
2200 || (h->smclas == XMC_XO && name[0] != '.'))
2201 h->flags |= XCOFF_DESCRIPTOR;
2202 if ((h->flags & XCOFF_DESCRIPTOR) != 0)
2204 struct xcoff_link_hash_entry *hds;
2206 hds = h->descriptor;
2211 dsnm = bfd_malloc ((bfd_size_type) strlen (name) + 2);
2215 strcpy (dsnm + 1, name);
2216 hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm,
2222 if (hds->root.type == bfd_link_hash_new)
2224 hds->root.type = bfd_link_hash_undefined;
2225 hds->root.u.undef.abfd = abfd;
2226 /* We do not want to add this to the undefined
2230 hds->descriptor = h;
2231 h->descriptor = hds;
2234 hds->flags |= XCOFF_DEF_DYNAMIC;
2235 if (hds->smclas == XMC_UA)
2236 hds->smclas = XMC_PR;
2238 /* An absolute symbol appears to actually define code, not a
2239 function descriptor. This is how some math functions are
2240 implemented on AIX 4.1. */
2241 if (h->smclas == XMC_XO
2242 && (hds->root.type == bfd_link_hash_undefined
2243 || hds->root.type == bfd_link_hash_undefweak))
2245 hds->smclas = XMC_XO;
2246 hds->root.type = bfd_link_hash_defined;
2247 hds->root.u.def.section = bfd_abs_section_ptr;
2248 hds->root.u.def.value = ldsym.l_value;
2253 if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
2255 free (coff_section_data (abfd, lsec)->contents);
2256 coff_section_data (abfd, lsec)->contents = NULL;
2259 /* Record this file in the import files. */
2261 n = ((struct xcoff_import_file *)
2262 bfd_alloc (abfd, (bfd_size_type) sizeof (struct xcoff_import_file)));
2267 /* For some reason, the path entry in the import file list for a
2268 shared object appears to always be empty. The file name is the
2271 if (abfd->my_archive == NULL)
2273 bname = bfd_get_filename (abfd);
2278 bname = bfd_get_filename (abfd->my_archive);
2279 mname = bfd_get_filename (abfd);
2281 s = strrchr (bname, '/');
2287 /* We start c at 1 because the first import file number is reserved
2289 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2291 pp = &(*pp)->next, ++c)
2295 xcoff_data (abfd)->import_file_id = c;
2300 /* Routines that are called after all the input files have been
2301 handled, but before the sections are laid out in memory. */
2303 /* Mark a symbol as not being garbage, including the section in which
2306 static INLINE boolean
2307 xcoff_mark_symbol (info, h)
2308 struct bfd_link_info *info;
2309 struct xcoff_link_hash_entry *h;
2312 if ((h->flags & XCOFF_MARK) != 0)
2315 h->flags |= XCOFF_MARK;
2316 if (h->root.type == bfd_link_hash_defined
2317 || h->root.type == bfd_link_hash_defweak)
2321 hsec = h->root.u.def.section;
2322 if (! bfd_is_abs_section (hsec)
2323 && (hsec->flags & SEC_MARK) == 0)
2325 if (! xcoff_mark (info, hsec))
2330 if (h->toc_section != NULL
2331 && (h->toc_section->flags & SEC_MARK) == 0)
2333 if (! xcoff_mark (info, h->toc_section))
2340 /* The mark phase of garbage collection. For a given section, mark
2341 it, and all the sections which define symbols to which it refers.
2342 Because this function needs to look at the relocs, we also count
2343 the number of relocs which need to be copied into the .loader
2347 xcoff_mark (info, sec)
2348 struct bfd_link_info *info;
2351 if (bfd_is_abs_section (sec)
2352 || (sec->flags & SEC_MARK) != 0)
2355 sec->flags |= SEC_MARK;
2357 if (sec->owner->xvec == info->hash->creator
2358 && coff_section_data (sec->owner, sec) != NULL
2359 && xcoff_section_data (sec->owner, sec) != NULL)
2361 register struct xcoff_link_hash_entry **hp, **hpend;
2362 struct internal_reloc *rel, *relend;
2364 /* Mark all the symbols in this section. */
2366 hp = (obj_xcoff_sym_hashes (sec->owner)
2367 + xcoff_section_data (sec->owner, sec)->first_symndx);
2368 hpend = (obj_xcoff_sym_hashes (sec->owner)
2369 + xcoff_section_data (sec->owner, sec)->last_symndx);
2370 for (; hp < hpend; hp++)
2372 register struct xcoff_link_hash_entry *h;
2376 && (h->flags & XCOFF_MARK) == 0)
2378 if (! xcoff_mark_symbol (info, h))
2383 /* Look through the section relocs. */
2385 if ((sec->flags & SEC_RELOC) != 0
2386 && sec->reloc_count > 0)
2388 rel = xcoff_read_internal_relocs (sec->owner, sec, true,
2389 (bfd_byte *) NULL, false,
2390 (struct internal_reloc *) NULL);
2393 relend = rel + sec->reloc_count;
2394 for (; rel < relend; rel++)
2397 struct xcoff_link_hash_entry *h;
2399 if ((unsigned int) rel->r_symndx
2400 > obj_raw_syment_count (sec->owner))
2403 h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
2405 && (h->flags & XCOFF_MARK) == 0)
2407 if (! xcoff_mark_symbol (info, h))
2411 rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
2413 && (rsec->flags & SEC_MARK) == 0)
2415 if (! xcoff_mark (info, rsec))
2419 /* See if this reloc needs to be copied into the .loader
2421 switch (rel->r_type)
2425 || h->root.type == bfd_link_hash_defined
2426 || h->root.type == bfd_link_hash_defweak
2427 || h->root.type == bfd_link_hash_common
2428 || ((h->flags & XCOFF_CALLED) != 0
2429 && (h->root.type == bfd_link_hash_undefined
2430 || h->root.type == bfd_link_hash_undefweak)
2431 && h->root.root.string[0] == '.'
2432 && h->descriptor != NULL
2433 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
2434 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
2435 && (h->descriptor->flags
2436 & XCOFF_DEF_REGULAR) == 0))))
2443 ++xcoff_hash_table (info)->ldrel_count;
2445 h->flags |= XCOFF_LDREL;
2452 /* We should never need a .loader reloc for a TOC
2458 if (! info->keep_memory
2459 && coff_section_data (sec->owner, sec) != NULL
2460 && coff_section_data (sec->owner, sec)->relocs != NULL
2461 && ! coff_section_data (sec->owner, sec)->keep_relocs)
2463 free (coff_section_data (sec->owner, sec)->relocs);
2464 coff_section_data (sec->owner, sec)->relocs = NULL;
2472 /* The sweep phase of garbage collection. Remove all garbage
2477 struct bfd_link_info *info;
2481 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2485 for (o = sub->sections; o != NULL; o = o->next)
2487 if ((o->flags & SEC_MARK) == 0)
2489 /* Keep all sections from non-XCOFF input files. Keep
2490 special sections. Keep .debug sections for the
2492 if (sub->xvec != info->hash->creator
2493 || o == xcoff_hash_table (info)->debug_section
2494 || o == xcoff_hash_table (info)->loader_section
2495 || o == xcoff_hash_table (info)->linkage_section
2496 || o == xcoff_hash_table (info)->toc_section
2497 || o == xcoff_hash_table (info)->descriptor_section
2498 || strcmp (o->name, ".debug") == 0)
2499 o->flags |= SEC_MARK;
2504 o->lineno_count = 0;
2511 /* Record the number of elements in a set. This is used to output the
2512 correct csect length. */
2515 bfd_xcoff_link_record_set (output_bfd, info, harg, size)
2517 struct bfd_link_info *info;
2518 struct bfd_link_hash_entry *harg;
2521 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2522 struct xcoff_link_size_list *n;
2525 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2528 /* This will hardly ever be called. I don't want to burn four bytes
2529 per global symbol, so instead the size is kept on a linked list
2530 attached to the hash table. */
2532 amt = sizeof (struct xcoff_link_size_list);
2533 n = (struct xcoff_link_size_list *) bfd_alloc (output_bfd, amt);
2536 n->next = xcoff_hash_table (info)->size_list;
2539 xcoff_hash_table (info)->size_list = n;
2541 h->flags |= XCOFF_HAS_SIZE;
2546 /* Import a symbol. */
2549 bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
2550 impmember, syscall_flag)
2552 struct bfd_link_info *info;
2553 struct bfd_link_hash_entry *harg;
2555 const char *imppath;
2556 const char *impfile;
2557 const char *impmember;
2558 unsigned int syscall_flag;
2560 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2562 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2565 /* A symbol name which starts with a period is the code for a
2566 function. If the symbol is undefined, then add an undefined
2567 symbol for the function descriptor, and import that instead. */
2568 if (h->root.root.string[0] == '.'
2569 && h->root.type == bfd_link_hash_undefined
2570 && val == (bfd_vma) -1)
2572 struct xcoff_link_hash_entry *hds;
2574 hds = h->descriptor;
2577 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
2578 h->root.root.string + 1,
2582 if (hds->root.type == bfd_link_hash_new)
2584 hds->root.type = bfd_link_hash_undefined;
2585 hds->root.u.undef.abfd = h->root.u.undef.abfd;
2587 hds->flags |= XCOFF_DESCRIPTOR;
2588 BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
2589 && (h->flags & XCOFF_DESCRIPTOR) == 0);
2590 hds->descriptor = h;
2591 h->descriptor = hds;
2594 /* Now, if the descriptor is undefined, import the descriptor
2595 rather than the symbol we were told to import. FIXME: Is
2596 this correct in all cases? */
2597 if (hds->root.type == bfd_link_hash_undefined)
2601 h->flags |= (XCOFF_IMPORT | syscall_flag);
2603 if (val != (bfd_vma) -1)
2605 if (h->root.type == bfd_link_hash_defined
2606 && (! bfd_is_abs_section (h->root.u.def.section)
2607 || h->root.u.def.value != val))
2609 if (! ((*info->callbacks->multiple_definition)
2610 (info, h->root.root.string, h->root.u.def.section->owner,
2611 h->root.u.def.section, h->root.u.def.value,
2612 output_bfd, bfd_abs_section_ptr, val)))
2616 h->root.type = bfd_link_hash_defined;
2617 h->root.u.def.section = bfd_abs_section_ptr;
2618 h->root.u.def.value = val;
2621 /* We overload the ldindx field to hold the l_ifile value for this
2623 BFD_ASSERT (h->ldsym == NULL);
2624 BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0);
2625 if (imppath == NULL)
2630 struct xcoff_import_file **pp;
2632 /* We start c at 1 because the first entry in the import list is
2633 reserved for the library search path. */
2634 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2636 pp = &(*pp)->next, ++c)
2638 if (strcmp ((*pp)->path, imppath) == 0
2639 && strcmp ((*pp)->file, impfile) == 0
2640 && strcmp ((*pp)->member, impmember) == 0)
2646 struct xcoff_import_file *n;
2647 bfd_size_type amt = sizeof (struct xcoff_import_file);
2649 n = (struct xcoff_import_file *) bfd_alloc (output_bfd, amt);
2655 n->member = impmember;
2665 /* Export a symbol. */
2668 bfd_xcoff_export_symbol (output_bfd, info, harg)
2670 struct bfd_link_info *info;
2671 struct bfd_link_hash_entry *harg;
2673 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2675 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2678 h->flags |= XCOFF_EXPORT;
2680 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
2681 I'm just going to ignore it until somebody explains it. */
2683 /* See if this is a function descriptor. It may be one even though
2684 it is not so marked. */
2685 if ((h->flags & XCOFF_DESCRIPTOR) == 0
2686 && h->root.root.string[0] != '.')
2689 struct xcoff_link_hash_entry *hfn;
2690 bfd_size_type amt = strlen (h->root.root.string) + 2;
2692 fnname = (char *) bfd_malloc (amt);
2696 strcpy (fnname + 1, h->root.root.string);
2697 hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
2698 fnname, false, false, true);
2701 && hfn->smclas == XMC_PR
2702 && (hfn->root.type == bfd_link_hash_defined
2703 || hfn->root.type == bfd_link_hash_defweak))
2705 h->flags |= XCOFF_DESCRIPTOR;
2706 h->descriptor = hfn;
2707 hfn->descriptor = h;
2711 /* Make sure we don't garbage collect this symbol. */
2712 if (! xcoff_mark_symbol (info, h))
2715 /* If this is a function descriptor, make sure we don't garbage
2716 collect the associated function code. We normally don't have to
2717 worry about this, because the descriptor will be attached to a
2718 section with relocs, but if we are creating the descriptor
2719 ourselves those relocs will not be visible to the mark code. */
2720 if ((h->flags & XCOFF_DESCRIPTOR) != 0)
2722 if (! xcoff_mark_symbol (info, h->descriptor))
2729 /* Count a reloc against a symbol. This is called for relocs
2730 generated by the linker script, typically for global constructors
2734 bfd_xcoff_link_count_reloc (output_bfd, info, name)
2736 struct bfd_link_info *info;
2739 struct xcoff_link_hash_entry *h;
2741 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2744 h = ((struct xcoff_link_hash_entry *)
2745 bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false,
2749 (*_bfd_error_handler) (_("%s: no such symbol"), name);
2750 bfd_set_error (bfd_error_no_symbols);
2754 h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
2755 ++xcoff_hash_table (info)->ldrel_count;
2757 /* Mark the symbol to avoid garbage collection. */
2758 if (! xcoff_mark_symbol (info, h))
2764 /* This function is called for each symbol to which the linker script
2768 bfd_xcoff_record_link_assignment (output_bfd, info, name)
2770 struct bfd_link_info *info;
2773 struct xcoff_link_hash_entry *h;
2775 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2778 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
2783 h->flags |= XCOFF_DEF_REGULAR;
2788 /* Build the .loader section. This is called by the XCOFF linker
2789 emulation before_allocation routine. We must set the size of the
2790 .loader section before the linker lays out the output file.
2791 LIBPATH is the library path to search for shared objects; this is
2792 normally built from the -L arguments passed to the linker. ENTRY
2793 is the name of the entry point symbol (the -e linker option).
2794 FILE_ALIGN is the alignment to use for sections within the file
2795 (the -H linker option). MAXSTACK is the maximum stack size (the
2796 -bmaxstack linker option). MAXDATA is the maximum data size (the
2797 -bmaxdata linker option). GC is whether to do garbage collection
2798 (the -bgc linker option). MODTYPE is the module type (the
2799 -bmodtype linker option). TEXTRO is whether the text section must
2800 be read only (the -btextro linker option). EXPORT_DEFINEDS is
2801 whether all defined symbols should be exported (the -unix linker
2802 option). SPECIAL_SECTIONS is set by this routine to csects with
2803 magic names like _end. */
2806 bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
2807 file_align, maxstack, maxdata, gc,
2808 modtype, textro, export_defineds,
2811 struct bfd_link_info *info;
2812 const char *libpath;
2814 unsigned long file_align;
2815 unsigned long maxstack;
2816 unsigned long maxdata;
2820 boolean export_defineds;
2821 asection **special_sections;
2823 struct xcoff_link_hash_entry *hentry;
2825 struct xcoff_loader_info ldinfo;
2827 size_t impsize, impcount;
2828 struct xcoff_import_file *fl;
2829 struct internal_ldhdr *ldhdr;
2830 bfd_size_type stoff;
2834 struct bfd_strtab_hash *debug_strtab;
2835 bfd_byte *debug_contents = NULL;
2838 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2841 for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
2842 special_sections[i] = NULL;
2846 ldinfo.failed = false;
2847 ldinfo.output_bfd = output_bfd;
2849 ldinfo.export_defineds = export_defineds;
2850 ldinfo.ldsym_count = 0;
2851 ldinfo.string_size = 0;
2852 ldinfo.strings = NULL;
2853 ldinfo.string_alc = 0;
2855 xcoff_data (output_bfd)->maxstack = maxstack;
2856 xcoff_data (output_bfd)->maxdata = maxdata;
2857 xcoff_data (output_bfd)->modtype = modtype;
2859 xcoff_hash_table (info)->file_align = file_align;
2860 xcoff_hash_table (info)->textro = textro;
2868 hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
2869 false, false, true);
2871 hentry->flags |= XCOFF_ENTRY;
2875 if (info->init_function || info->fini_function) {
2876 struct xcoff_link_hash_entry *hrtinit;
2877 struct internal_ldsym *ldsym;
2879 hrtinit = xcoff_link_hash_lookup (xcoff_hash_table (info),
2881 false, false, true);
2882 if (hrtinit != NULL)
2884 xcoff_mark_symbol (info, hrtinit);
2885 hrtinit->flags |= (XCOFF_DEF_REGULAR | XCOFF_RTINIT);
2889 (*_bfd_error_handler)
2890 (_("error: undefined symbol __rtinit"));
2895 /* __rtinit initalized here
2896 Some information, like the location of the .initfini seciton will
2899 name or offset taken care of below with bfd_xcoff_put_ldsymbol_name. */
2900 amt = sizeof (struct internal_ldsym);
2901 ldsym = (struct internal_ldsym *) bfd_malloc (amt);
2903 ldsym->l_value = 0; /* will be filled in later */
2904 ldsym->l_scnum = 2; /* data section */
2905 ldsym->l_smtype = XTY_SD; /* csect section definition */
2906 ldsym->l_smclas = 5; /* .rw */
2907 ldsym->l_ifile = 0; /* special system loader symbol */
2908 ldsym->l_parm = 0; /* NA */
2910 /* Force __rtinit to be the first symbol in the loader symbol table
2911 See xcoff_build_ldsyms
2913 The first 3 symbol table indices are reserved to indicate the data,
2914 text and bss sections. */
2915 BFD_ASSERT (0 == ldinfo.ldsym_count);
2917 hrtinit->ldindx = 3;
2918 ldinfo.ldsym_count = 1;
2919 hrtinit->ldsym = ldsym;
2921 if (false == bfd_xcoff_put_ldsymbol_name (ldinfo.output_bfd, &ldinfo,
2923 hrtinit->root.root.string))
2928 /* This symbol is written out by xcoff_write_global_symbol
2929 Set stuff up so xcoff_write_global_symbol logic works. */
2930 hrtinit->flags |= XCOFF_DEF_REGULAR | XCOFF_MARK;
2931 hrtinit->root.type = bfd_link_hash_defined;
2932 hrtinit->root.u.def.value = 0;
2935 /* Garbage collect unused sections. */
2936 if (info->relocateable
2939 || (hentry->root.type != bfd_link_hash_defined
2940 && hentry->root.type != bfd_link_hash_defweak))
2943 xcoff_hash_table (info)->gc = false;
2945 /* We still need to call xcoff_mark, in order to set ldrel_count
2947 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2951 for (o = sub->sections; o != NULL; o = o->next)
2953 if ((o->flags & SEC_MARK) == 0)
2955 if (! xcoff_mark (info, o))
2963 if (! xcoff_mark (info, hentry->root.u.def.section))
2966 xcoff_hash_table (info)->gc = true;
2969 /* Return special sections to the caller. */
2970 for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
2972 sec = xcoff_hash_table (info)->special_sections[i];
2976 && (sec->flags & SEC_MARK) == 0)
2980 special_sections[i] = sec;
2983 if (info->input_bfds == NULL)
2985 /* I'm not sure what to do in this bizarre case. */
2989 xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
2994 /* Work out the size of the import file names. Each import file ID
2995 consists of three null terminated strings: the path, the file
2996 name, and the archive member name. The first entry in the list
2997 of names is the path to use to find objects, which the linker has
2998 passed in as the libpath argument. For some reason, the path
2999 entry in the other import file names appears to always be empty. */
3000 impsize = strlen (libpath) + 3;
3002 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3005 impsize += (strlen (fl->path)
3007 + strlen (fl->member)
3011 /* Set up the .loader section header. */
3012 ldhdr = &xcoff_hash_table (info)->ldhdr;
3013 ldhdr->l_version = bfd_xcoff_ldhdr_version(output_bfd);
3014 ldhdr->l_nsyms = ldinfo.ldsym_count;
3015 ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
3016 ldhdr->l_istlen = impsize;
3017 ldhdr->l_nimpid = impcount;
3018 ldhdr->l_impoff = (bfd_xcoff_ldhdrsz(output_bfd)
3019 + ldhdr->l_nsyms * bfd_xcoff_ldsymsz(output_bfd)
3020 + ldhdr->l_nreloc * bfd_xcoff_ldrelsz(output_bfd));
3021 ldhdr->l_stlen = ldinfo.string_size;
3022 stoff = ldhdr->l_impoff + impsize;
3023 if (ldinfo.string_size == 0)
3026 ldhdr->l_stoff = stoff;
3028 /* 64 bit elements to ldhdr
3029 The swap out routine for 32 bit will ignore them.
3030 Nothing fancy, symbols come after the header and relocs come
3032 ldhdr->l_symoff = bfd_xcoff_ldhdrsz (output_bfd);
3033 ldhdr->l_rldoff = (bfd_xcoff_ldhdrsz (output_bfd)
3034 + ldhdr->l_nsyms * bfd_xcoff_ldsymsz (output_bfd));
3036 /* We now know the final size of the .loader section. Allocate
3038 lsec = xcoff_hash_table (info)->loader_section;
3039 lsec->_raw_size = stoff + ldhdr->l_stlen;
3040 lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
3041 if (lsec->contents == NULL)
3044 /* Set up the header. */
3045 bfd_xcoff_swap_ldhdr_out (output_bfd, ldhdr, lsec->contents);
3047 /* Set up the import file names. */
3048 out = (char *) lsec->contents + ldhdr->l_impoff;
3049 strcpy (out, libpath);
3050 out += strlen (libpath) + 1;
3053 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3055 register const char *s;
3058 while ((*out++ = *s++) != '\0')
3061 while ((*out++ = *s++) != '\0')
3064 while ((*out++ = *s++) != '\0')
3068 BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
3070 /* Set up the symbol string table. */
3071 if (ldinfo.string_size > 0)
3073 memcpy (out, ldinfo.strings, ldinfo.string_size);
3074 free (ldinfo.strings);
3075 ldinfo.strings = NULL;
3078 /* We can't set up the symbol table or the relocs yet, because we
3079 don't yet know the final position of the various sections. The
3080 .loader symbols are written out when the corresponding normal
3081 symbols are written out in xcoff_link_input_bfd or
3082 xcoff_write_global_symbol. The .loader relocs are written out
3083 when the corresponding normal relocs are handled in
3084 xcoff_link_input_bfd.
3087 /* Allocate space for the magic sections. */
3088 sec = xcoff_hash_table (info)->linkage_section;
3089 if (sec->_raw_size > 0)
3091 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3092 if (sec->contents == NULL)
3095 sec = xcoff_hash_table (info)->toc_section;
3096 if (sec->_raw_size > 0)
3098 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3099 if (sec->contents == NULL)
3102 sec = xcoff_hash_table (info)->descriptor_section;
3103 if (sec->_raw_size > 0)
3105 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
3106 if (sec->contents == NULL)
3110 /* Now that we've done garbage collection, figure out the contents
3111 of the .debug section. */
3112 debug_strtab = xcoff_hash_table (info)->debug_strtab;
3114 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3117 bfd_size_type symcount;
3118 unsigned long *debug_index;
3120 bfd_byte *esym, *esymend;
3121 bfd_size_type symesz;
3123 if (sub->xvec != info->hash->creator)
3125 subdeb = bfd_get_section_by_name (sub, ".debug");
3126 if (subdeb == NULL || subdeb->_raw_size == 0)
3129 if (info->strip == strip_all
3130 || info->strip == strip_debugger
3131 || info->discard == discard_all)
3133 subdeb->_raw_size = 0;
3137 if (! _bfd_coff_get_external_symbols (sub))
3140 symcount = obj_raw_syment_count (sub);
3141 debug_index = ((unsigned long *)
3142 bfd_zalloc (sub, symcount * sizeof (unsigned long)));
3143 if (debug_index == NULL)
3145 xcoff_data (sub)->debug_indices = debug_index;
3147 /* Grab the contents of the .debug section. We use malloc and
3148 copy the names into the debug stringtab, rather than
3149 bfd_alloc, because I expect that, when linking many files
3150 together, many of the strings will be the same. Storing the
3151 strings in the hash table should save space in this case. */
3152 debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size);
3153 if (debug_contents == NULL)
3155 if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
3156 (file_ptr) 0, subdeb->_raw_size))
3159 csectpp = xcoff_data (sub)->csects;
3161 symesz = bfd_coff_symesz (sub);
3162 esym = (bfd_byte *) obj_coff_external_syms (sub);
3163 esymend = esym + symcount * symesz;
3164 while (esym < esymend)
3166 struct internal_syment sym;
3168 bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
3170 *debug_index = (unsigned long) -1;
3172 if (sym._n._n_n._n_zeroes == 0
3175 || ((*csectpp)->flags & SEC_MARK) != 0
3176 || *csectpp == bfd_abs_section_ptr)
3177 && bfd_coff_symname_in_debug (sub, &sym))
3182 name = (char *) debug_contents + sym._n._n_n._n_offset;
3183 indx = _bfd_stringtab_add (debug_strtab, name, true, true);
3184 if (indx == (bfd_size_type) -1)
3186 *debug_index = indx;
3189 esym += (sym.n_numaux + 1) * symesz;
3190 csectpp += sym.n_numaux + 1;
3191 debug_index += sym.n_numaux + 1;
3194 free (debug_contents);
3195 debug_contents = NULL;
3197 /* Clear the size of subdeb, so that it is not included directly
3198 in the output file. */
3199 subdeb->_raw_size = 0;
3201 if (! info->keep_memory)
3203 if (! _bfd_coff_free_symbols (sub))
3208 if (info->strip != strip_all)
3209 xcoff_hash_table (info)->debug_section->_raw_size =
3210 _bfd_stringtab_size (debug_strtab);
3215 if (ldinfo.strings != NULL)
3216 free (ldinfo.strings);
3217 if (debug_contents != NULL)
3218 free (debug_contents);
3223 bfd_xcoff_link_generate_rtinit (abfd, init, fini)
3228 struct bfd_in_memory *bim;
3230 bim = ((struct bfd_in_memory *)
3231 bfd_malloc ((bfd_size_type) sizeof (struct bfd_in_memory)));
3238 abfd->link_next = 0;
3239 abfd->format = bfd_object;
3240 abfd->iostream = (PTR) bim;
3241 abfd->flags = BFD_IN_MEMORY;
3242 abfd->direction = write_direction;
3245 if (false == bfd_xcoff_generate_rtinit (abfd, init, fini))
3248 /* need to reset to unknown or it will not be read back in correctly */
3249 abfd->format = bfd_unknown;
3250 abfd->direction = read_direction;
3257 /* Add a symbol to the .loader symbols, if necessary. */
3260 xcoff_build_ldsyms (h, p)
3261 struct xcoff_link_hash_entry *h;
3264 struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
3267 if (h->root.type == bfd_link_hash_warning)
3268 h = (struct xcoff_link_hash_entry *) h->root.u.i.link;
3271 Special handling of this symbol to make is the first symbol in
3272 the loader symbol table. Make sure this pass through does not
3274 if (h->flags & XCOFF_RTINIT)
3279 /* If this is a final link, and the symbol was defined as a common
3280 symbol in a regular object file, and there was no definition in
3281 any dynamic object, then the linker will have allocated space for
3282 the symbol in a common section but the XCOFF_DEF_REGULAR flag
3283 will not have been set. */
3284 if (h->root.type == bfd_link_hash_defined
3285 && (h->flags & XCOFF_DEF_REGULAR) == 0
3286 && (h->flags & XCOFF_REF_REGULAR) != 0
3287 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3288 && (bfd_is_abs_section (h->root.u.def.section)
3289 || (h->root.u.def.section->owner->flags & DYNAMIC) == 0))
3290 h->flags |= XCOFF_DEF_REGULAR;
3292 /* If all defined symbols should be exported, mark them now. We
3293 don't want to export the actual functions, just the function
3295 if (ldinfo->export_defineds
3296 && (h->flags & XCOFF_DEF_REGULAR) != 0
3297 && h->root.root.string[0] != '.')
3301 /* We don't export a symbol which is being defined by an object
3302 included from an archive which contains a shared object. The
3303 rationale is that if an archive contains both an unshared and
3304 a shared object, then there must be some reason that the
3305 unshared object is unshared, and we don't want to start
3306 providing a shared version of it. In particular, this solves
3307 a bug involving the _savefNN set of functions. gcc will call
3308 those functions without providing a slot to restore the TOC,
3309 so it is essential that these functions be linked in directly
3310 and not from a shared object, which means that a shared
3311 object which also happens to link them in must not export
3312 them. This is confusing, but I haven't been able to think of
3313 a different approach. Note that the symbols can, of course,
3314 be exported explicitly. */
3316 if ((h->root.type == bfd_link_hash_defined
3317 || h->root.type == bfd_link_hash_defweak)
3318 && h->root.u.def.section->owner != NULL
3319 && h->root.u.def.section->owner->my_archive != NULL)
3321 bfd *arbfd, *member;
3323 arbfd = h->root.u.def.section->owner->my_archive;
3324 member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL);
3325 while (member != NULL)
3327 if ((member->flags & DYNAMIC) != 0)
3332 member = bfd_openr_next_archived_file (arbfd, member);
3337 h->flags |= XCOFF_EXPORT;
3340 /* We don't want to garbage collect symbols which are not defined in
3341 XCOFF files. This is a convenient place to mark them. */
3342 if (xcoff_hash_table (ldinfo->info)->gc
3343 && (h->flags & XCOFF_MARK) == 0
3344 && (h->root.type == bfd_link_hash_defined
3345 || h->root.type == bfd_link_hash_defweak)
3346 && (h->root.u.def.section->owner == NULL
3347 || (h->root.u.def.section->owner->xvec
3348 != ldinfo->info->hash->creator)))
3349 h->flags |= XCOFF_MARK;
3351 /* If this symbol is called and defined in a dynamic object, or it
3352 is imported, then we need to set up global linkage code for it.
3353 (Unless we did garbage collection and we didn't need this
3355 if ((h->flags & XCOFF_CALLED) != 0
3356 && (h->root.type == bfd_link_hash_undefined
3357 || h->root.type == bfd_link_hash_undefweak)
3358 && h->root.root.string[0] == '.'
3359 && h->descriptor != NULL
3360 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
3361 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
3362 && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
3363 && (! xcoff_hash_table (ldinfo->info)->gc
3364 || (h->flags & XCOFF_MARK) != 0))
3367 struct xcoff_link_hash_entry *hds;
3369 sec = xcoff_hash_table (ldinfo->info)->linkage_section;
3370 h->root.type = bfd_link_hash_defined;
3371 h->root.u.def.section = sec;
3372 h->root.u.def.value = sec->_raw_size;
3374 h->flags |= XCOFF_DEF_REGULAR;
3375 sec->_raw_size += bfd_xcoff_glink_code_size(ldinfo->output_bfd);
3377 /* The global linkage code requires a TOC entry for the
3379 hds = h->descriptor;
3380 BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
3381 || hds->root.type == bfd_link_hash_undefweak)
3382 && (hds->flags & XCOFF_DEF_REGULAR) == 0);
3383 hds->flags |= XCOFF_MARK;
3384 if (hds->toc_section == NULL)
3389 xcoff32 uses 4 bytes in the toc.
3390 xcoff64 uses 8 bytes in the toc. */
3391 if (bfd_xcoff_is_xcoff64 (ldinfo->output_bfd))
3395 else if (bfd_xcoff_is_xcoff32 (ldinfo->output_bfd))
3404 hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
3405 hds->u.toc_offset = hds->toc_section->_raw_size;
3406 hds->toc_section->_raw_size += byte_size;
3407 ++xcoff_hash_table (ldinfo->info)->ldrel_count;
3408 ++hds->toc_section->reloc_count;
3410 hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
3412 /* We need to call xcoff_build_ldsyms recursively here,
3413 because we may already have passed hds on the traversal. */
3414 xcoff_build_ldsyms (hds, p);
3418 /* If this symbol is exported, but not defined, we need to try to
3420 if ((h->flags & XCOFF_EXPORT) != 0
3421 && (h->flags & XCOFF_IMPORT) == 0
3422 && (h->flags & XCOFF_DEF_REGULAR) == 0
3423 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3424 && (h->root.type == bfd_link_hash_undefined
3425 || h->root.type == bfd_link_hash_undefweak))
3427 if ((h->flags & XCOFF_DESCRIPTOR) != 0
3428 && (h->descriptor->root.type == bfd_link_hash_defined
3429 || h->descriptor->root.type == bfd_link_hash_defweak))
3433 /* This is an undefined function descriptor associated with
3434 a defined entry point. We can build up a function
3435 descriptor ourselves. Believe it or not, the AIX linker
3436 actually does this, and there are cases where we need to
3438 sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
3439 h->root.type = bfd_link_hash_defined;
3440 h->root.u.def.section = sec;
3441 h->root.u.def.value = sec->_raw_size;
3443 h->flags |= XCOFF_DEF_REGULAR;
3445 /* The size of the function descriptor depends if this is an
3446 xcoff32 (12) or xcoff64 (24). */
3448 bfd_xcoff_function_descriptor_size(ldinfo->output_bfd);
3450 /* A function descriptor uses two relocs: one for the
3451 associated code, and one for the TOC address. */
3452 xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
3453 sec->reloc_count += 2;
3455 /* We handle writing out the contents of the descriptor in
3456 xcoff_write_global_symbol. */
3460 (*_bfd_error_handler)
3461 (_("warning: attempt to export undefined symbol `%s'"),
3462 h->root.root.string);
3468 /* If this is still a common symbol, and it wasn't garbage
3469 collected, we need to actually allocate space for it in the .bss
3471 if (h->root.type == bfd_link_hash_common
3472 && (! xcoff_hash_table (ldinfo->info)->gc
3473 || (h->flags & XCOFF_MARK) != 0)
3474 && h->root.u.c.p->section->_raw_size == 0)
3476 BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
3477 h->root.u.c.p->section->_raw_size = h->root.u.c.size;
3480 /* We need to add a symbol to the .loader section if it is mentioned
3481 in a reloc which we are copying to the .loader section and it was
3482 not defined or common, or if it is the entry point, or if it is
3485 if (((h->flags & XCOFF_LDREL) == 0
3486 || h->root.type == bfd_link_hash_defined
3487 || h->root.type == bfd_link_hash_defweak
3488 || h->root.type == bfd_link_hash_common)
3489 && (h->flags & XCOFF_ENTRY) == 0
3490 && (h->flags & XCOFF_EXPORT) == 0)
3496 /* We don't need to add this symbol if we did garbage collection and
3497 we did not mark this symbol. */
3498 if (xcoff_hash_table (ldinfo->info)->gc
3499 && (h->flags & XCOFF_MARK) == 0)
3505 /* We may have already processed this symbol due to the recursive
3507 if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
3510 /* We need to add this symbol to the .loader symbols. */
3512 BFD_ASSERT (h->ldsym == NULL);
3513 amt = sizeof (struct internal_ldsym);
3514 h->ldsym = (struct internal_ldsym *) bfd_zalloc (ldinfo->output_bfd, amt);
3515 if (h->ldsym == NULL)
3517 ldinfo->failed = true;
3521 if ((h->flags & XCOFF_IMPORT) != 0)
3522 h->ldsym->l_ifile = h->ldindx;
3524 /* The first 3 symbol table indices are reserved to indicate the
3525 data, text and bss sections. */
3526 h->ldindx = ldinfo->ldsym_count + 3;
3528 ++ldinfo->ldsym_count;
3530 if (false == bfd_xcoff_put_ldsymbol_name (ldinfo->output_bfd, ldinfo,
3532 h->root.root.string))
3537 h->flags |= XCOFF_BUILT_LDSYM;
3542 /* Do the final link step. */
3545 _bfd_xcoff_bfd_final_link (abfd, info)
3547 struct bfd_link_info *info;
3549 bfd_size_type symesz;
3550 struct xcoff_final_link_info finfo;
3552 struct bfd_link_order *p;
3553 bfd_size_type max_contents_size;
3554 bfd_size_type max_sym_count;
3555 bfd_size_type max_lineno_count;
3556 bfd_size_type max_reloc_count;
3557 bfd_size_type max_output_reloc_count;
3558 file_ptr rel_filepos;
3560 file_ptr line_filepos;
3561 unsigned int linesz;
3563 bfd_byte *external_relocs = NULL;
3564 char strbuf[STRING_SIZE_SIZE];
3569 abfd->flags |= DYNAMIC;
3571 symesz = bfd_coff_symesz (abfd);
3574 finfo.output_bfd = abfd;
3575 finfo.strtab = NULL;
3576 finfo.section_info = NULL;
3577 finfo.last_file_index = -1;
3578 finfo.toc_symindx = -1;
3579 finfo.internal_syms = NULL;
3580 finfo.sym_indices = NULL;
3581 finfo.outsyms = NULL;
3582 finfo.linenos = NULL;
3583 finfo.contents = NULL;
3584 finfo.external_relocs = NULL;
3586 finfo.ldsym = (xcoff_hash_table (info)->loader_section->contents
3587 + bfd_xcoff_ldhdrsz (abfd));
3588 finfo.ldrel = (xcoff_hash_table (info)->loader_section->contents
3589 + bfd_xcoff_ldhdrsz(abfd)
3590 + (xcoff_hash_table (info)->ldhdr.l_nsyms
3591 * bfd_xcoff_ldsymsz(abfd)));
3593 xcoff_data (abfd)->coff.link_info = info;
3595 finfo.strtab = _bfd_stringtab_init ();
3596 if (finfo.strtab == NULL)
3599 /* Count the line number and relocation entries required for the
3600 output file. Determine a few maximum sizes. */
3601 max_contents_size = 0;
3602 max_lineno_count = 0;
3603 max_reloc_count = 0;
3604 for (o = abfd->sections; o != NULL; o = o->next)
3607 o->lineno_count = 0;
3608 for (p = o->link_order_head; p != NULL; p = p->next)
3610 if (p->type == bfd_indirect_link_order)
3614 sec = p->u.indirect.section;
3616 /* Mark all sections which are to be included in the
3617 link. This will normally be every section. We need
3618 to do this so that we can identify any sections which
3619 the linker has decided to not include. */
3620 sec->linker_mark = true;
3622 if (info->strip == strip_none
3623 || info->strip == strip_some)
3624 o->lineno_count += sec->lineno_count;
3626 o->reloc_count += sec->reloc_count;
3628 if (sec->_raw_size > max_contents_size)
3629 max_contents_size = sec->_raw_size;
3630 if (sec->lineno_count > max_lineno_count)
3631 max_lineno_count = sec->lineno_count;
3632 if (coff_section_data (sec->owner, sec) != NULL
3633 && xcoff_section_data (sec->owner, sec) != NULL
3634 && (xcoff_section_data (sec->owner, sec)->lineno_count
3635 > max_lineno_count))
3637 xcoff_section_data (sec->owner, sec)->lineno_count;
3638 if (sec->reloc_count > max_reloc_count)
3639 max_reloc_count = sec->reloc_count;
3641 else if (p->type == bfd_section_reloc_link_order
3642 || p->type == bfd_symbol_reloc_link_order)
3647 /* Compute the file positions for all the sections. */
3648 if (abfd->output_has_begun)
3650 if (xcoff_hash_table (info)->file_align != 0)
3657 file_align = xcoff_hash_table (info)->file_align;
3658 if (file_align != 0)
3660 boolean saw_contents;
3665 /* Insert .pad sections before every section which has
3666 contents and is loaded, if it is preceded by some other
3667 section which has contents and is loaded. */
3668 saw_contents = true;
3669 for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
3671 if (strcmp ((*op)->name, ".pad") == 0)
3672 saw_contents = false;
3673 else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
3674 && ((*op)->flags & SEC_LOAD) != 0)
3677 saw_contents = true;
3682 /* Create a pad section and place it before the section
3683 that needs padding. This requires unlinking and
3684 relinking the bfd's section list. */
3686 st = abfd->section_tail;
3687 n = bfd_make_section_anyway (abfd, ".pad");
3688 n->flags = SEC_HAS_CONTENTS;
3689 n->alignment_power = 0;
3691 BFD_ASSERT (*st == n);
3692 bfd_section_list_remove (abfd, st);
3693 bfd_section_list_insert (abfd, op, n);
3696 saw_contents = false;
3701 /* Reset the section indices after inserting the new
3704 for (o = abfd->sections; o != NULL; o = o->next)
3707 o->target_index = indx;
3709 BFD_ASSERT ((unsigned int) indx == abfd->section_count);
3711 /* Work out appropriate sizes for the .pad sections to force
3712 each section to land on a page boundary. This bit of
3713 code knows what compute_section_file_positions is going
3715 sofar = bfd_coff_filhsz (abfd);
3716 sofar += bfd_coff_aoutsz (abfd);
3717 sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
3718 for (o = abfd->sections; o != NULL; o = o->next)
3719 if ((bfd_xcoff_is_reloc_count_overflow
3720 (abfd, (bfd_vma) o->reloc_count))
3721 || (bfd_xcoff_is_lineno_count_overflow
3722 (abfd, (bfd_vma) o->lineno_count)))
3723 /* 64 does not overflow, need to check if 32 does */
3724 sofar += bfd_coff_scnhsz (abfd);
3726 for (o = abfd->sections; o != NULL; o = o->next)
3728 if (strcmp (o->name, ".pad") == 0)
3732 BFD_ASSERT (o->_raw_size == 0);
3733 pageoff = sofar & (file_align - 1);
3736 o->_raw_size = file_align - pageoff;
3737 sofar += file_align - pageoff;
3738 o->flags |= SEC_HAS_CONTENTS;
3743 if ((o->flags & SEC_HAS_CONTENTS) != 0)
3744 sofar += BFD_ALIGN (o->_raw_size,
3745 1 << o->alignment_power);
3750 if (! bfd_coff_compute_section_file_positions (abfd))
3754 /* Allocate space for the pointers we need to keep for the relocs. */
3758 /* We use section_count + 1, rather than section_count, because
3759 the target_index fields are 1 based. */
3760 amt = abfd->section_count + 1;
3761 amt *= sizeof (struct xcoff_link_section_info);
3762 finfo.section_info = (struct xcoff_link_section_info *) bfd_malloc (amt);
3763 if (finfo.section_info == NULL)
3765 for (i = 0; i <= abfd->section_count; i++)
3767 finfo.section_info[i].relocs = NULL;
3768 finfo.section_info[i].rel_hashes = NULL;
3769 finfo.section_info[i].toc_rel_hashes = NULL;
3773 /* Set the file positions for the relocs. */
3774 rel_filepos = obj_relocbase (abfd);
3775 relsz = bfd_coff_relsz (abfd);
3776 max_output_reloc_count = 0;
3777 for (o = abfd->sections; o != NULL; o = o->next)
3779 if (o->reloc_count == 0)
3783 /* A stripped file has no relocs. However, we still
3784 allocate the buffers, so that later code doesn't have to
3785 worry about whether we are stripping or not. */
3786 if (info->strip == strip_all)
3790 o->flags |= SEC_RELOC;
3791 o->rel_filepos = rel_filepos;
3792 rel_filepos += o->reloc_count * relsz;
3795 /* We don't know the indices of global symbols until we have
3796 written out all the local symbols. For each section in
3797 the output file, we keep an array of pointers to hash
3798 table entries. Each entry in the array corresponds to a
3799 reloc. When we find a reloc against a global symbol, we
3800 set the corresponding entry in this array so that we can
3801 fix up the symbol index after we have written out all the
3804 Because of this problem, we also keep the relocs in
3805 memory until the end of the link. This wastes memory.
3806 We could backpatch the file later, I suppose, although it
3808 amt = o->reloc_count;
3809 amt *= sizeof (struct internal_reloc);
3810 finfo.section_info[o->target_index].relocs =
3811 (struct internal_reloc *) bfd_malloc (amt);
3813 amt = o->reloc_count;
3814 amt *= sizeof (struct xcoff_link_hash_entry *);
3815 finfo.section_info[o->target_index].rel_hashes =
3816 (struct xcoff_link_hash_entry **) bfd_malloc (amt);
3818 if (finfo.section_info[o->target_index].relocs == NULL
3819 || finfo.section_info[o->target_index].rel_hashes == NULL)
3822 if (o->reloc_count > max_output_reloc_count)
3823 max_output_reloc_count = o->reloc_count;
3827 /* We now know the size of the relocs, so we can determine the file
3828 positions of the line numbers. */
3829 line_filepos = rel_filepos;
3830 finfo.line_filepos = line_filepos;
3831 linesz = bfd_coff_linesz (abfd);
3832 for (o = abfd->sections; o != NULL; o = o->next)
3834 if (o->lineno_count == 0)
3835 o->line_filepos = 0;
3838 o->line_filepos = line_filepos;
3839 line_filepos += o->lineno_count * linesz;
3842 /* Reset the reloc and lineno counts, so that we can use them to
3843 count the number of entries we have output so far. */
3845 o->lineno_count = 0;
3848 obj_sym_filepos (abfd) = line_filepos;
3850 /* Figure out the largest number of symbols in an input BFD. Take
3851 the opportunity to clear the output_has_begun fields of all the
3852 input BFD's. We want at least 6 symbols, since that is the
3853 number which xcoff_write_global_symbol may need. */
3855 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3859 sub->output_has_begun = false;
3860 sz = obj_raw_syment_count (sub);
3861 if (sz > max_sym_count)
3865 /* Allocate some buffers used while linking. */
3866 amt = max_sym_count * sizeof (struct internal_syment);
3867 finfo.internal_syms = (struct internal_syment *) bfd_malloc (amt);
3869 amt = max_sym_count * sizeof (long);
3870 finfo.sym_indices = (long *) bfd_malloc (amt);
3872 amt = (max_sym_count + 1) * symesz;
3873 finfo.outsyms = (bfd_byte *) bfd_malloc (amt);
3875 amt = max_lineno_count * bfd_coff_linesz (abfd);
3876 finfo.linenos = (bfd_byte *) bfd_malloc (amt);
3878 amt = max_contents_size;
3879 finfo.contents = (bfd_byte *) bfd_malloc (amt);
3881 amt = max_reloc_count * relsz;
3882 finfo.external_relocs = (bfd_byte *) bfd_malloc (amt);
3884 if ((finfo.internal_syms == NULL && max_sym_count > 0)
3885 || (finfo.sym_indices == NULL && max_sym_count > 0)
3886 || finfo.outsyms == NULL
3887 || (finfo.linenos == NULL && max_lineno_count > 0)
3888 || (finfo.contents == NULL && max_contents_size > 0)
3889 || (finfo.external_relocs == NULL && max_reloc_count > 0))
3892 obj_raw_syment_count (abfd) = 0;
3893 xcoff_data (abfd)->toc = (bfd_vma) -1;
3895 /* We now know the position of everything in the file, except that
3896 we don't know the size of the symbol table and therefore we don't
3897 know where the string table starts. We just build the string
3898 table in memory as we go along. We process all the relocations
3899 for a single input file at once. */
3900 for (o = abfd->sections; o != NULL; o = o->next)
3902 for (p = o->link_order_head; p != NULL; p = p->next)
3904 if (p->type == bfd_indirect_link_order
3905 && p->u.indirect.section->owner->xvec == abfd->xvec)
3907 sub = p->u.indirect.section->owner;
3908 if (! sub->output_has_begun)
3910 if (! xcoff_link_input_bfd (&finfo, sub))
3912 sub->output_has_begun = true;
3915 else if (p->type == bfd_section_reloc_link_order
3916 || p->type == bfd_symbol_reloc_link_order)
3918 if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
3923 if (! _bfd_default_link_order (abfd, info, o, p))
3930 /* Free up the buffers used by xcoff_link_input_bfd. */
3932 if (finfo.internal_syms != NULL)
3934 free (finfo.internal_syms);
3935 finfo.internal_syms = NULL;
3937 if (finfo.sym_indices != NULL)
3939 free (finfo.sym_indices);
3940 finfo.sym_indices = NULL;
3942 if (finfo.linenos != NULL)
3944 free (finfo.linenos);
3945 finfo.linenos = NULL;
3947 if (finfo.contents != NULL)
3949 free (finfo.contents);
3950 finfo.contents = NULL;
3952 if (finfo.external_relocs != NULL)
3954 free (finfo.external_relocs);
3955 finfo.external_relocs = NULL;
3958 /* The value of the last C_FILE symbol is supposed to be -1. Write
3960 if (finfo.last_file_index != -1)
3962 finfo.last_file.n_value = -(bfd_vma) 1;
3963 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
3964 (PTR) finfo.outsyms);
3965 pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz;
3966 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3967 || bfd_bwrite (finfo.outsyms, symesz, abfd) != symesz)
3971 /* Write out all the global symbols which do not come from XCOFF
3973 xcoff_link_hash_traverse (xcoff_hash_table (info),
3974 xcoff_write_global_symbol,
3977 if (finfo.outsyms != NULL)
3979 free (finfo.outsyms);
3980 finfo.outsyms = NULL;
3983 /* Now that we have written out all the global symbols, we know the
3984 symbol indices to use for relocs against them, and we can finally
3985 write out the relocs. */
3986 amt = max_output_reloc_count * relsz;
3987 external_relocs = (bfd_byte *) bfd_malloc (amt);
3988 if (external_relocs == NULL && max_output_reloc_count != 0)
3991 for (o = abfd->sections; o != NULL; o = o->next)
3993 struct internal_reloc *irel;
3994 struct internal_reloc *irelend;
3995 struct xcoff_link_hash_entry **rel_hash;
3996 struct xcoff_toc_rel_hash *toc_rel_hash;
3998 bfd_size_type rel_size;
4000 /* A stripped file has no relocs. */
4001 if (info->strip == strip_all)
4007 if (o->reloc_count == 0)
4010 irel = finfo.section_info[o->target_index].relocs;
4011 irelend = irel + o->reloc_count;
4012 rel_hash = finfo.section_info[o->target_index].rel_hashes;
4013 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4015 if (*rel_hash != NULL)
4017 if ((*rel_hash)->indx < 0)
4019 if (! ((*info->callbacks->unattached_reloc)
4020 (info, (*rel_hash)->root.root.string,
4021 (bfd *) NULL, o, irel->r_vaddr)))
4023 (*rel_hash)->indx = 0;
4025 irel->r_symndx = (*rel_hash)->indx;
4029 for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
4030 toc_rel_hash != NULL;
4031 toc_rel_hash = toc_rel_hash->next)
4033 if (toc_rel_hash->h->u.toc_indx < 0)
4035 if (! ((*info->callbacks->unattached_reloc)
4036 (info, toc_rel_hash->h->root.root.string,
4037 (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
4039 toc_rel_hash->h->u.toc_indx = 0;
4041 toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
4044 /* XCOFF requires that the relocs be sorted by address. We tend
4045 to produce them in the order in which their containing csects
4046 appear in the symbol table, which is not necessarily by
4047 address. So we sort them here. There may be a better way to
4049 qsort ((PTR) finfo.section_info[o->target_index].relocs,
4050 o->reloc_count, sizeof (struct internal_reloc),
4053 irel = finfo.section_info[o->target_index].relocs;
4054 irelend = irel + o->reloc_count;
4055 erel = external_relocs;
4056 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4057 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
4059 rel_size = relsz * o->reloc_count;
4060 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
4061 || bfd_bwrite ((PTR) external_relocs, rel_size, abfd) != rel_size)
4065 if (external_relocs != NULL)
4067 free (external_relocs);
4068 external_relocs = NULL;
4071 /* Free up the section information. */
4072 if (finfo.section_info != NULL)
4076 for (i = 0; i < abfd->section_count; i++)
4078 if (finfo.section_info[i].relocs != NULL)
4079 free (finfo.section_info[i].relocs);
4080 if (finfo.section_info[i].rel_hashes != NULL)
4081 free (finfo.section_info[i].rel_hashes);
4083 free (finfo.section_info);
4084 finfo.section_info = NULL;
4087 /* Write out the loader section contents. */
4088 BFD_ASSERT ((bfd_byte *) finfo.ldrel
4089 == (xcoff_hash_table (info)->loader_section->contents
4090 + xcoff_hash_table (info)->ldhdr.l_impoff));
4091 o = xcoff_hash_table (info)->loader_section;
4092 if (! bfd_set_section_contents (abfd, o->output_section, o->contents,
4093 (file_ptr) o->output_offset, o->_raw_size))
4096 /* Write out the magic sections. */
4097 o = xcoff_hash_table (info)->linkage_section;
4098 if (o->_raw_size > 0
4099 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4100 (file_ptr) o->output_offset,
4103 o = xcoff_hash_table (info)->toc_section;
4104 if (o->_raw_size > 0
4105 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4106 (file_ptr) o->output_offset,
4109 o = xcoff_hash_table (info)->descriptor_section;
4110 if (o->_raw_size > 0
4111 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4112 (file_ptr) o->output_offset,
4116 /* Write out the string table. */
4117 pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
4118 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4121 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
4123 amt = STRING_SIZE_SIZE;
4124 if (bfd_bwrite (strbuf, amt, abfd) != amt)
4126 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
4129 _bfd_stringtab_free (finfo.strtab);
4131 /* Write out the debugging string table. */
4132 o = xcoff_hash_table (info)->debug_section;
4135 struct bfd_strtab_hash *debug_strtab;
4137 debug_strtab = xcoff_hash_table (info)->debug_strtab;
4138 BFD_ASSERT (o->output_section->_raw_size - o->output_offset
4139 >= _bfd_stringtab_size (debug_strtab));
4140 pos = o->output_section->filepos + o->output_offset;
4141 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4143 if (! _bfd_stringtab_emit (abfd, debug_strtab))
4147 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
4148 not try to write out the symbols. */
4149 bfd_get_symcount (abfd) = 0;
4154 if (finfo.strtab != NULL)
4155 _bfd_stringtab_free (finfo.strtab);
4157 if (finfo.section_info != NULL)
4161 for (i = 0; i < abfd->section_count; i++)
4163 if (finfo.section_info[i].relocs != NULL)
4164 free (finfo.section_info[i].relocs);
4165 if (finfo.section_info[i].rel_hashes != NULL)
4166 free (finfo.section_info[i].rel_hashes);
4168 free (finfo.section_info);
4171 if (finfo.internal_syms != NULL)
4172 free (finfo.internal_syms);
4173 if (finfo.sym_indices != NULL)
4174 free (finfo.sym_indices);
4175 if (finfo.outsyms != NULL)
4176 free (finfo.outsyms);
4177 if (finfo.linenos != NULL)
4178 free (finfo.linenos);
4179 if (finfo.contents != NULL)
4180 free (finfo.contents);
4181 if (finfo.external_relocs != NULL)
4182 free (finfo.external_relocs);
4183 if (external_relocs != NULL)
4184 free (external_relocs);
4188 /* Link an input file into the linker output file. This function
4189 handles all the sections and relocations of the input file at once. */
4192 xcoff_link_input_bfd (finfo, input_bfd)
4193 struct xcoff_final_link_info *finfo;
4197 const char *strings;
4198 bfd_size_type syment_base;
4199 unsigned int n_tmask;
4200 unsigned int n_btshft;
4202 bfd_size_type isymesz;
4203 bfd_size_type osymesz;
4204 bfd_size_type linesz;
4207 struct xcoff_link_hash_entry **sym_hash;
4208 struct internal_syment *isymp;
4210 unsigned long *debug_index;
4212 unsigned long output_index;
4219 /* We can just skip DYNAMIC files, unless this is a static link. */
4220 if ((input_bfd->flags & DYNAMIC) != 0
4221 && ! finfo->info->static_link)
4224 /* Move all the symbols to the output file. */
4226 output_bfd = finfo->output_bfd;
4228 syment_base = obj_raw_syment_count (output_bfd);
4229 isymesz = bfd_coff_symesz (input_bfd);
4230 osymesz = bfd_coff_symesz (output_bfd);
4231 linesz = bfd_coff_linesz (input_bfd);
4232 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
4234 n_tmask = coff_data (input_bfd)->local_n_tmask;
4235 n_btshft = coff_data (input_bfd)->local_n_btshft;
4237 /* Define macros so that ISFCN, et. al., macros work correctly. */
4238 #define N_TMASK n_tmask
4239 #define N_BTSHFT n_btshft
4242 if (! finfo->info->keep_memory)
4245 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
4248 if (! _bfd_coff_get_external_symbols (input_bfd))
4251 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4252 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4253 sym_hash = obj_xcoff_sym_hashes (input_bfd);
4254 csectpp = xcoff_data (input_bfd)->csects;
4255 debug_index = xcoff_data (input_bfd)->debug_indices;
4256 isymp = finfo->internal_syms;
4257 indexp = finfo->sym_indices;
4258 output_index = syment_base;
4259 outsym = finfo->outsyms;
4263 while (esym < esym_end)
4266 struct internal_syment isym;
4267 union internal_auxent aux;
4273 bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
4275 /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
4277 if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
4279 BFD_ASSERT (isymp->n_numaux > 0);
4280 bfd_coff_swap_aux_in (input_bfd,
4281 (PTR) (esym + isymesz * isymp->n_numaux),
4282 isymp->n_type, isymp->n_sclass,
4283 isymp->n_numaux - 1, isymp->n_numaux,
4286 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
4289 /* Make a copy of *isymp so that the relocate_section function
4290 always sees the original values. This is more reliable than
4291 always recomputing the symbol value even if we are stripping
4295 /* If this symbol is in the .loader section, swap out the
4296 .loader symbol information. If this is an external symbol
4297 reference to a defined symbol, though, then wait until we get
4298 to the definition. */
4299 if (isym.n_sclass == C_EXT
4300 && *sym_hash != NULL
4301 && (*sym_hash)->ldsym != NULL
4303 || (*sym_hash)->root.type == bfd_link_hash_undefined))
4305 struct xcoff_link_hash_entry *h;
4306 struct internal_ldsym *ldsym;
4310 if (isym.n_scnum > 0)
4312 ldsym->l_scnum = (*csectpp)->output_section->target_index;
4313 ldsym->l_value = (isym.n_value
4314 + (*csectpp)->output_section->vma
4315 + (*csectpp)->output_offset
4320 ldsym->l_scnum = isym.n_scnum;
4321 ldsym->l_value = isym.n_value;
4324 ldsym->l_smtype = smtyp;
4325 if (((h->flags & XCOFF_DEF_REGULAR) == 0
4326 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4327 || (h->flags & XCOFF_IMPORT) != 0)
4328 ldsym->l_smtype |= L_IMPORT;
4329 if (((h->flags & XCOFF_DEF_REGULAR) != 0
4330 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4331 || (h->flags & XCOFF_EXPORT) != 0)
4332 ldsym->l_smtype |= L_EXPORT;
4333 if ((h->flags & XCOFF_ENTRY) != 0)
4334 ldsym->l_smtype |= L_ENTRY;
4336 ldsym->l_smclas = aux.x_csect.x_smclas;
4338 if (ldsym->l_ifile == (bfd_size_type) -1)
4340 else if (ldsym->l_ifile == 0)
4342 if ((ldsym->l_smtype & L_IMPORT) == 0)
4348 if (h->root.type == bfd_link_hash_defined
4349 || h->root.type == bfd_link_hash_defweak)
4350 impbfd = h->root.u.def.section->owner;
4351 else if (h->root.type == bfd_link_hash_undefined
4352 || h->root.type == bfd_link_hash_undefweak)
4353 impbfd = h->root.u.undef.abfd;
4361 BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
4362 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
4369 BFD_ASSERT (h->ldindx >= 0);
4370 bfd_xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
4373 * bfd_xcoff_ldsymsz (finfo->output_bfd))));
4376 /* Fill in snentry now that we know the target_index. */
4377 if ((h->flags & XCOFF_ENTRY) != 0
4378 && (h->root.type == bfd_link_hash_defined
4379 || h->root.type == bfd_link_hash_defweak))
4381 xcoff_data (output_bfd)->snentry =
4382 h->root.u.def.section->output_section->target_index;
4390 add = 1 + isym.n_numaux;
4392 /* If we are skipping this csect, we want to skip this symbol. */
4393 if (*csectpp == NULL)
4396 /* If we garbage collected this csect, we want to skip this
4399 && xcoff_hash_table (finfo->info)->gc
4400 && ((*csectpp)->flags & SEC_MARK) == 0
4401 && *csectpp != bfd_abs_section_ptr)
4404 /* An XCOFF linker always skips C_STAT symbols. */
4406 && isymp->n_sclass == C_STAT)
4409 /* We skip all but the first TOC anchor. */
4411 && isymp->n_sclass == C_HIDEXT
4412 && aux.x_csect.x_smclas == XMC_TC0)
4414 if (finfo->toc_symindx != -1)
4418 bfd_vma tocval, tocend;
4421 tocval = ((*csectpp)->output_section->vma
4422 + (*csectpp)->output_offset
4426 /* We want to find out if tocval is a good value to use
4427 as the TOC anchor--that is, whether we can access all
4428 of the TOC using a 16 bit offset from tocval. This
4429 test assumes that the TOC comes at the end of the
4430 output section, as it does in the default linker
4432 tocend = ((*csectpp)->output_section->vma
4433 + (*csectpp)->output_section->_raw_size);
4434 for (inp = finfo->info->input_bfds;
4436 inp = inp->link_next)
4439 for (o = inp->sections; o != NULL; o = o->next)
4440 if (strcmp (o->name, ".tocbss") == 0)
4442 bfd_vma new_toc_end;
4443 new_toc_end = (o->output_section->vma
4446 if (new_toc_end > tocend)
4447 tocend = new_toc_end;
4452 if (tocval + 0x10000 < tocend)
4454 (*_bfd_error_handler)
4455 (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"),
4456 (unsigned long) (tocend - tocval));
4457 bfd_set_error (bfd_error_file_too_big);
4461 if (tocval + 0x8000 < tocend)
4465 tocadd = tocend - (tocval + 0x8000);
4467 isym.n_value += tocadd;
4470 finfo->toc_symindx = output_index;
4471 xcoff_data (finfo->output_bfd)->toc = tocval;
4472 xcoff_data (finfo->output_bfd)->sntoc =
4473 (*csectpp)->output_section->target_index;
4479 /* If we are stripping all symbols, we want to skip this one. */
4481 && finfo->info->strip == strip_all)
4484 /* We can skip resolved external references. */
4486 && isym.n_sclass == C_EXT
4488 && (*sym_hash)->root.type != bfd_link_hash_undefined)
4491 /* We can skip common symbols if they got defined somewhere
4494 && isym.n_sclass == C_EXT
4496 && ((*sym_hash)->root.type != bfd_link_hash_common
4497 || (*sym_hash)->root.u.c.p->section != *csectpp)
4498 && ((*sym_hash)->root.type != bfd_link_hash_defined
4499 || (*sym_hash)->root.u.def.section != *csectpp))
4502 /* Skip local symbols if we are discarding them. */
4504 && finfo->info->discard == discard_all
4505 && isym.n_sclass != C_EXT
4506 && (isym.n_sclass != C_HIDEXT
4507 || smtyp != XTY_SD))
4510 /* If we stripping debugging symbols, and this is a debugging
4511 symbol, then skip it. */
4513 && finfo->info->strip == strip_debugger
4514 && isym.n_scnum == N_DEBUG)
4517 /* If some symbols are stripped based on the name, work out the
4518 name and decide whether to skip this symbol. We don't handle
4519 this correctly for symbols whose names are in the .debug
4520 section; to get it right we would need a new bfd_strtab_hash
4521 function to return the string given the index. */
4523 && (finfo->info->strip == strip_some
4524 || finfo->info->discard == discard_l)
4525 && (debug_index == NULL || *debug_index == (unsigned long) -1))
4528 char buf[SYMNMLEN + 1];
4530 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
4535 if ((finfo->info->strip == strip_some
4536 && (bfd_hash_lookup (finfo->info->keep_hash, name, false,
4538 || (finfo->info->discard == discard_l
4539 && (isym.n_sclass != C_EXT
4540 && (isym.n_sclass != C_HIDEXT
4541 || smtyp != XTY_SD))
4542 && bfd_is_local_label_name (input_bfd, name)))
4546 /* We can not skip the first TOC anchor. */
4549 && finfo->info->strip != strip_all)
4552 /* We now know whether we are to skip this symbol or not. */
4555 /* Adjust the symbol in order to output it. */
4557 if (isym._n._n_n._n_zeroes == 0
4558 && isym._n._n_n._n_offset != 0)
4560 /* This symbol has a long name. Enter it in the string
4561 table we are building. If *debug_index != -1, the
4562 name has already been entered in the .debug section. */
4563 if (debug_index != NULL && *debug_index != (unsigned long) -1)
4564 isym._n._n_n._n_offset = *debug_index;
4570 name = _bfd_coff_internal_syment_name (input_bfd, &isym,
4575 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
4576 if (indx == (bfd_size_type) -1)
4578 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
4582 if (isym.n_sclass != C_BSTAT
4583 && isym.n_sclass != C_ESTAT
4584 && isym.n_sclass != C_DECL
4585 && isym.n_scnum > 0)
4587 isym.n_scnum = (*csectpp)->output_section->target_index;
4588 isym.n_value += ((*csectpp)->output_section->vma
4589 + (*csectpp)->output_offset
4593 /* The value of a C_FILE symbol is the symbol index of the
4594 next C_FILE symbol. The value of the last C_FILE symbol
4595 is -1. We try to get this right, below, just before we
4596 write the symbols out, but in the general case we may
4597 have to write the symbol out twice. */
4598 if (isym.n_sclass == C_FILE)
4600 if (finfo->last_file_index != -1
4601 && finfo->last_file.n_value != (bfd_vma) output_index)
4603 /* We must correct the value of the last C_FILE entry. */
4604 finfo->last_file.n_value = output_index;
4605 if ((bfd_size_type) finfo->last_file_index >= syment_base)
4607 /* The last C_FILE symbol is in this input file. */
4608 bfd_coff_swap_sym_out (output_bfd,
4609 (PTR) &finfo->last_file,
4610 (PTR) (finfo->outsyms
4611 + ((finfo->last_file_index
4617 /* We have already written out the last C_FILE
4618 symbol. We need to write it out again. We
4619 borrow *outsym temporarily. */
4622 bfd_coff_swap_sym_out (output_bfd,
4623 (PTR) &finfo->last_file,
4626 pos = obj_sym_filepos (output_bfd);
4627 pos += finfo->last_file_index * osymesz;
4628 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
4629 || (bfd_bwrite (outsym, osymesz, output_bfd)
4635 finfo->last_file_index = output_index;
4636 finfo->last_file = isym;
4639 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4640 into the line numbers. We update the symbol values when
4641 we handle the line numbers. */
4642 if (isym.n_sclass == C_BINCL
4643 || isym.n_sclass == C_EINCL)
4645 isym.n_value = finfo->line_filepos;
4649 /* Output the symbol. */
4651 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
4653 *indexp = output_index;
4655 if (isym.n_sclass == C_EXT)
4658 struct xcoff_link_hash_entry *h;
4660 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
4662 h = obj_xcoff_sym_hashes (input_bfd)[indx];
4663 BFD_ASSERT (h != NULL);
4664 h->indx = output_index;
4667 /* If this is a symbol in the TOC which we may have merged
4668 (class XMC_TC), remember the symbol index of the TOC
4670 if (isym.n_sclass == C_HIDEXT
4671 && aux.x_csect.x_smclas == XMC_TC
4672 && *sym_hash != NULL)
4674 BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
4675 BFD_ASSERT ((*sym_hash)->toc_section != NULL);
4676 (*sym_hash)->u.toc_indx = output_index;
4679 output_index += add;
4680 outsym += add * osymesz;
4683 esym += add * isymesz;
4687 if (debug_index != NULL)
4690 for (--add; add > 0; --add)
4694 /* Fix up the aux entries and the C_BSTAT symbols. This must be
4695 done in a separate pass, because we don't know the correct symbol
4696 indices until we have already decided which symbols we are going
4699 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4700 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4701 isymp = finfo->internal_syms;
4702 indexp = finfo->sym_indices;
4703 csectpp = xcoff_data (input_bfd)->csects;
4704 outsym = finfo->outsyms;
4705 while (esym < esym_end)
4709 add = 1 + isymp->n_numaux;
4712 esym += add * isymesz;
4717 if (isymp->n_sclass == C_BSTAT)
4719 struct internal_syment isym;
4723 /* The value of a C_BSTAT symbol is the symbol table
4724 index of the containing csect. */
4725 bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
4726 indx = isym.n_value;
4727 if (indx < obj_raw_syment_count (input_bfd))
4731 symindx = finfo->sym_indices[indx];
4735 isym.n_value = symindx;
4736 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
4744 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
4746 union internal_auxent aux;
4748 bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
4749 isymp->n_sclass, i, isymp->n_numaux,
4752 if (isymp->n_sclass == C_FILE)
4754 /* This is the file name (or some comment put in by
4755 the compiler). If it is long, we must put it in
4756 the string table. */
4757 if (aux.x_file.x_n.x_zeroes == 0
4758 && aux.x_file.x_n.x_offset != 0)
4760 const char *filename;
4763 BFD_ASSERT (aux.x_file.x_n.x_offset
4764 >= STRING_SIZE_SIZE);
4765 if (strings == NULL)
4767 strings = _bfd_coff_read_string_table (input_bfd);
4768 if (strings == NULL)
4771 filename = strings + aux.x_file.x_n.x_offset;
4772 indx = _bfd_stringtab_add (finfo->strtab, filename,
4774 if (indx == (bfd_size_type) -1)
4776 aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
4779 else if ((isymp->n_sclass == C_EXT
4780 || isymp->n_sclass == C_HIDEXT)
4781 && i + 1 == isymp->n_numaux)
4784 /* We don't support type checking. I don't know if
4786 aux.x_csect.x_parmhash = 0;
4787 /* I don't think anybody uses these fields, but we'd
4788 better clobber them just in case. */
4789 aux.x_csect.x_stab = 0;
4790 aux.x_csect.x_snstab = 0;
4792 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
4796 indx = aux.x_csect.x_scnlen.l;
4797 if (indx < obj_raw_syment_count (input_bfd))
4801 symindx = finfo->sym_indices[indx];
4804 aux.x_csect.x_scnlen.l = 0;
4808 aux.x_csect.x_scnlen.l = symindx;
4813 else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
4817 if (ISFCN (isymp->n_type)
4818 || ISTAG (isymp->n_sclass)
4819 || isymp->n_sclass == C_BLOCK
4820 || isymp->n_sclass == C_FCN)
4822 indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
4824 && indx < obj_raw_syment_count (input_bfd))
4826 /* We look forward through the symbol for
4827 the index of the next symbol we are going
4828 to include. I don't know if this is
4830 while (finfo->sym_indices[indx] < 0
4831 && indx < obj_raw_syment_count (input_bfd))
4833 if (indx >= obj_raw_syment_count (input_bfd))
4834 indx = output_index;
4836 indx = finfo->sym_indices[indx];
4837 aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
4842 indx = aux.x_sym.x_tagndx.l;
4843 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
4847 symindx = finfo->sym_indices[indx];
4849 aux.x_sym.x_tagndx.l = 0;
4851 aux.x_sym.x_tagndx.l = symindx;
4856 /* Copy over the line numbers, unless we are stripping
4857 them. We do this on a symbol by symbol basis in
4858 order to more easily handle garbage collection. */
4859 if ((isymp->n_sclass == C_EXT
4860 || isymp->n_sclass == C_HIDEXT)
4862 && isymp->n_numaux > 1
4863 && ISFCN (isymp->n_type)
4864 && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
4866 if (finfo->info->strip != strip_none
4867 && finfo->info->strip != strip_some)
4868 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4871 asection *enclosing;
4872 unsigned int enc_count;
4873 bfd_signed_vma linoff;
4874 struct internal_lineno lin;
4877 enclosing = xcoff_section_data (abfd, o)->enclosing;
4878 enc_count = xcoff_section_data (abfd, o)->lineno_count;
4879 if (oline != enclosing)
4881 file_ptr pos = enclosing->line_filepos;
4882 bfd_size_type amt = linesz * enc_count;
4883 if (bfd_seek (input_bfd, pos, SEEK_SET) != 0
4884 || (bfd_bread (finfo->linenos, amt, input_bfd)
4890 linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
4891 - enclosing->line_filepos);
4893 bfd_coff_swap_lineno_in (input_bfd,
4894 (PTR) (finfo->linenos + linoff),
4897 || ((bfd_size_type) lin.l_addr.l_symndx
4901 obj_coff_external_syms (input_bfd)))
4903 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4906 bfd_byte *linpend, *linp;
4908 bfd_size_type count;
4910 lin.l_addr.l_symndx = *indexp;
4911 bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
4912 (PTR) (finfo->linenos
4915 linpend = (finfo->linenos
4916 + enc_count * linesz);
4917 offset = (o->output_section->vma
4920 for (linp = finfo->linenos + linoff + linesz;
4924 bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
4926 if (lin.l_lnno == 0)
4928 lin.l_addr.l_paddr += offset;
4929 bfd_coff_swap_lineno_out (output_bfd,
4934 count = (linp - (finfo->linenos + linoff)) / linesz;
4936 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
4937 (o->output_section->line_filepos
4938 + o->output_section->lineno_count * linesz);
4940 if (bfd_seek (output_bfd,
4941 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
4943 || (bfd_bwrite (finfo->linenos + linoff,
4944 linesz * count, output_bfd)
4948 o->output_section->lineno_count += count;
4952 struct internal_syment *iisp, *iispend;
4957 /* Update any C_BINCL or C_EINCL symbols
4958 that refer to a line number in the
4959 range we just output. */
4960 iisp = finfo->internal_syms;
4962 + obj_raw_syment_count (input_bfd));
4963 iindp = finfo->sym_indices;
4964 oos = finfo->outsyms;
4965 while (iisp < iispend)
4968 && (iisp->n_sclass == C_BINCL
4969 || iisp->n_sclass == C_EINCL)
4970 && ((bfd_size_type) iisp->n_value
4971 >= (bfd_size_type)(enclosing->line_filepos + linoff))
4972 && ((bfd_size_type) iisp->n_value
4973 < (enclosing->line_filepos
4974 + enc_count * linesz)))
4976 struct internal_syment iis;
4978 bfd_coff_swap_sym_in (output_bfd,
4983 - enclosing->line_filepos
4985 + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
4986 bfd_coff_swap_sym_out (output_bfd,
4992 iiadd = 1 + iisp->n_numaux;
4994 oos += iiadd * osymesz;
5003 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
5004 isymp->n_sclass, i, isymp->n_numaux,
5016 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
5017 symbol will be the first symbol in the next input file. In the
5018 normal case, this will save us from writing out the C_FILE symbol
5020 if (finfo->last_file_index != -1
5021 && (bfd_size_type) finfo->last_file_index >= syment_base)
5023 finfo->last_file.n_value = output_index;
5024 bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
5025 (PTR) (finfo->outsyms
5026 + ((finfo->last_file_index - syment_base)
5030 /* Write the modified symbols to the output file. */
5031 if (outsym > finfo->outsyms)
5033 file_ptr pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
5034 bfd_size_type amt = outsym - finfo->outsyms;
5035 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5036 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5039 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
5040 + (outsym - finfo->outsyms) / osymesz)
5043 obj_raw_syment_count (output_bfd) = output_index;
5046 /* Don't let the linker relocation routines discard the symbols. */
5047 keep_syms = obj_coff_keep_syms (input_bfd);
5048 obj_coff_keep_syms (input_bfd) = true;
5050 /* Relocate the contents of each section. */
5051 for (o = input_bfd->sections; o != NULL; o = o->next)
5056 if (! o->linker_mark)
5058 /* This section was omitted from the link. */
5062 if ((o->flags & SEC_HAS_CONTENTS) == 0
5063 || o->_raw_size == 0
5064 || (o->flags & SEC_IN_MEMORY) != 0)
5067 /* We have set filepos correctly for the sections we created to
5068 represent csects, so bfd_get_section_contents should work. */
5069 if (coff_section_data (input_bfd, o) != NULL
5070 && coff_section_data (input_bfd, o)->contents != NULL)
5071 contents = coff_section_data (input_bfd, o)->contents;
5073 if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
5074 (file_ptr) 0, o->_raw_size))
5076 contents = finfo->contents;
5079 if ((o->flags & SEC_RELOC) != 0)
5082 struct internal_reloc *internal_relocs;
5083 struct internal_reloc *irel;
5085 struct internal_reloc *irelend;
5086 struct xcoff_link_hash_entry **rel_hash;
5089 /* Read in the relocs. */
5090 target_index = o->output_section->target_index;
5091 internal_relocs = (xcoff_read_internal_relocs
5092 (input_bfd, o, false, finfo->external_relocs,
5094 (finfo->section_info[target_index].relocs
5095 + o->output_section->reloc_count)));
5096 if (internal_relocs == NULL)
5099 /* Call processor specific code to relocate the section
5101 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
5105 finfo->internal_syms,
5106 xcoff_data (input_bfd)->csects))
5109 offset = o->output_section->vma + o->output_offset - o->vma;
5110 irel = internal_relocs;
5111 irelend = irel + o->reloc_count;
5112 rel_hash = (finfo->section_info[target_index].rel_hashes
5113 + o->output_section->reloc_count);
5114 for (; irel < irelend; irel++, rel_hash++)
5116 struct xcoff_link_hash_entry *h = NULL;
5117 struct internal_ldrel ldrel;
5122 /* Adjust the reloc address and symbol index. */
5124 irel->r_vaddr += offset;
5126 r_symndx = irel->r_symndx;
5131 h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
5133 if (r_symndx != -1 && finfo->info->strip != strip_all)
5136 && h->smclas != XMC_TD
5137 && (irel->r_type == R_TOC
5138 || irel->r_type == R_GL
5139 || irel->r_type == R_TCL
5140 || irel->r_type == R_TRL
5141 || irel->r_type == R_TRLA))
5143 /* This is a TOC relative reloc with a symbol
5144 attached. The symbol should be the one which
5145 this reloc is for. We want to make this
5146 reloc against the TOC address of the symbol,
5147 not the symbol itself. */
5148 BFD_ASSERT (h->toc_section != NULL);
5149 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
5150 if (h->u.toc_indx != -1)
5151 irel->r_symndx = h->u.toc_indx;
5154 struct xcoff_toc_rel_hash *n;
5155 struct xcoff_link_section_info *si;
5158 amt = sizeof (struct xcoff_toc_rel_hash);
5159 n = ((struct xcoff_toc_rel_hash *)
5160 bfd_alloc (finfo->output_bfd, amt));
5163 si = finfo->section_info + target_index;
5164 n->next = si->toc_rel_hashes;
5167 si->toc_rel_hashes = n;
5172 /* This is a global symbol. */
5174 irel->r_symndx = h->indx;
5177 /* This symbol is being written at the end
5178 of the file, and we do not yet know the
5179 symbol index. We save the pointer to the
5180 hash table entry in the rel_hash list.
5181 We set the indx field to -2 to indicate
5182 that this symbol must not be stripped. */
5191 indx = finfo->sym_indices[r_symndx];
5195 struct internal_syment *is;
5197 /* Relocations against a TC0 TOC anchor are
5198 automatically transformed to be against
5199 the TOC anchor in the output file. */
5200 is = finfo->internal_syms + r_symndx;
5201 if (is->n_sclass == C_HIDEXT
5202 && is->n_numaux > 0)
5205 union internal_auxent aux;
5209 obj_coff_external_syms (input_bfd))
5210 + ((r_symndx + is->n_numaux)
5212 bfd_coff_swap_aux_in (input_bfd, auxptr,
5213 is->n_type, is->n_sclass,
5217 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
5218 && aux.x_csect.x_smclas == XMC_TC0)
5219 indx = finfo->toc_symindx;
5224 irel->r_symndx = indx;
5228 struct internal_syment *is;
5231 char buf[SYMNMLEN + 1];
5233 /* This reloc is against a symbol we are
5234 stripping. It would be possible to handle
5235 this case, but I don't think it's worth it. */
5236 is = finfo->internal_syms + r_symndx;
5238 name = (_bfd_coff_internal_syment_name
5239 (input_bfd, is, buf));
5244 if (! ((*finfo->info->callbacks->unattached_reloc)
5245 (finfo->info, name, input_bfd, o,
5253 switch (irel->r_type)
5257 || h->root.type == bfd_link_hash_defined
5258 || h->root.type == bfd_link_hash_defweak
5259 || h->root.type == bfd_link_hash_common)
5266 /* This reloc needs to be copied into the .loader
5268 ldrel.l_vaddr = irel->r_vaddr;
5270 ldrel.l_symndx = -(bfd_size_type ) 1;
5272 || (h->root.type == bfd_link_hash_defined
5273 || h->root.type == bfd_link_hash_defweak
5274 || h->root.type == bfd_link_hash_common))
5279 sec = xcoff_data (input_bfd)->csects[r_symndx];
5280 else if (h->root.type == bfd_link_hash_common)
5281 sec = h->root.u.c.p->section;
5283 sec = h->root.u.def.section;
5284 sec = sec->output_section;
5286 if (strcmp (sec->name, ".text") == 0)
5288 else if (strcmp (sec->name, ".data") == 0)
5290 else if (strcmp (sec->name, ".bss") == 0)
5294 (*_bfd_error_handler)
5295 (_("%s: loader reloc in unrecognized section `%s'"),
5296 bfd_archive_filename (input_bfd),
5298 bfd_set_error (bfd_error_nonrepresentable_section);
5304 if (! finfo->info->relocateable
5305 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
5306 && (h->flags & XCOFF_IMPORT) == 0)
5308 /* We already called the undefined_symbol
5309 callback for this relocation, in
5310 _bfd_ppc_xcoff_relocate_section. Don't
5311 issue any more warnings. */
5314 if (h->ldindx < 0 && ! quiet)
5316 (*_bfd_error_handler)
5317 (_("%s: `%s' in loader reloc but not loader sym"),
5318 bfd_archive_filename (input_bfd),
5319 h->root.root.string);
5320 bfd_set_error (bfd_error_bad_value);
5323 ldrel.l_symndx = h->ldindx;
5325 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
5326 ldrel.l_rsecnm = o->output_section->target_index;
5327 if (xcoff_hash_table (finfo->info)->textro
5328 && strcmp (o->output_section->name, ".text") == 0
5331 (*_bfd_error_handler)
5332 (_("%s: loader reloc in read-only section %s"),
5333 bfd_archive_filename (input_bfd),
5334 bfd_get_section_name (finfo->output_bfd,
5335 o->output_section));
5336 bfd_set_error (bfd_error_invalid_operation);
5339 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel,
5342 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5350 /* We should never need a .loader reloc for a TOC
5356 o->output_section->reloc_count += o->reloc_count;
5359 /* Write out the modified section contents. */
5360 if (! bfd_set_section_contents (output_bfd, o->output_section,
5361 contents, (file_ptr) o->output_offset,
5362 (o->_cooked_size != 0
5368 obj_coff_keep_syms (input_bfd) = keep_syms;
5370 if (! finfo->info->keep_memory)
5372 if (! _bfd_coff_free_symbols (input_bfd))
5382 /* Write out a non-XCOFF global symbol. */
5386 xcoff_write_global_symbol (h, inf)
5387 struct xcoff_link_hash_entry *h;
5390 struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) inf;
5393 struct internal_syment isym;
5394 union internal_auxent aux;
5399 output_bfd = finfo->output_bfd;
5400 outsym = finfo->outsyms;
5402 if (h->root.type == bfd_link_hash_warning)
5404 h = (struct xcoff_link_hash_entry *) h->root.u.i.link;
5405 if (h->root.type == bfd_link_hash_new)
5409 /* If this symbol was garbage collected, just skip it. */
5410 if (xcoff_hash_table (finfo->info)->gc
5411 && (h->flags & XCOFF_MARK) == 0)
5414 /* If we need a .loader section entry, write it out. */
5415 if (h->ldsym != NULL)
5417 struct internal_ldsym *ldsym;
5422 if (h->root.type == bfd_link_hash_undefined
5423 || h->root.type == bfd_link_hash_undefweak)
5427 ldsym->l_scnum = N_UNDEF;
5428 ldsym->l_smtype = XTY_ER;
5429 impbfd = h->root.u.undef.abfd;
5432 else if (h->root.type == bfd_link_hash_defined
5433 || h->root.type == bfd_link_hash_defweak)
5438 sec = h->root.u.def.section;
5439 ldsym->l_value = (sec->output_section->vma
5440 + sec->output_offset
5441 + h->root.u.def.value);
5442 ldsym->l_scnum = sec->output_section->target_index;
5443 ldsym->l_smtype = XTY_SD;
5444 impbfd = sec->owner;
5450 if (((h->flags & XCOFF_DEF_REGULAR) == 0
5451 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5452 || (h->flags & XCOFF_IMPORT) != 0)
5455 Import symbols are defined so the check above will make
5456 the l_smtype XTY_SD. But this is not correct, it should
5458 ldsym->l_smtype |= L_IMPORT;
5461 if (((h->flags & XCOFF_DEF_REGULAR) != 0
5462 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5463 || (h->flags & XCOFF_EXPORT) != 0)
5465 ldsym->l_smtype |= L_EXPORT;
5468 if ((h->flags & XCOFF_ENTRY) != 0)
5470 ldsym->l_smtype |= L_ENTRY;
5473 if ((h->flags & XCOFF_RTINIT) != 0)
5475 ldsym->l_smtype = XTY_SD;
5478 ldsym->l_smclas = h->smclas;
5480 if (ldsym->l_smtype & L_IMPORT)
5482 if ((h->root.type == bfd_link_hash_defined
5483 || h->root.type == bfd_link_hash_defweak)
5484 && (h->root.u.def.value != 0))
5486 ldsym->l_smclas = XMC_XO;
5488 else if ((h->flags & (XCOFF_SYSCALL32 | XCOFF_SYSCALL64)) ==
5489 (XCOFF_SYSCALL32 | XCOFF_SYSCALL64))
5491 ldsym->l_smclas = XMC_SV3264;
5493 else if (h->flags & XCOFF_SYSCALL32)
5495 ldsym->l_smclas = XMC_SV;
5497 else if (h->flags & XCOFF_SYSCALL64)
5499 ldsym->l_smclas = XMC_SV64;
5503 if (ldsym->l_ifile == -(bfd_size_type) 1)
5507 else if (ldsym->l_ifile == 0)
5509 if ((ldsym->l_smtype & L_IMPORT) == 0)
5513 else if (impbfd == NULL)
5519 BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
5520 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
5526 BFD_ASSERT (h->ldindx >= 0);
5528 bfd_xcoff_swap_ldsym_out (output_bfd, ldsym,
5531 * bfd_xcoff_ldsymsz(finfo->output_bfd)));
5535 /* If this symbol needs global linkage code, write it out. */
5536 if (h->root.type == bfd_link_hash_defined
5537 && (h->root.u.def.section
5538 == xcoff_hash_table (finfo->info)->linkage_section))
5544 p = h->root.u.def.section->contents + h->root.u.def.value;
5546 /* The first instruction in the global linkage code loads a
5547 specific TOC element. */
5548 tocoff = (h->descriptor->toc_section->output_section->vma
5549 + h->descriptor->toc_section->output_offset
5550 - xcoff_data (output_bfd)->toc);
5552 if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
5554 tocoff += h->descriptor->u.toc_offset;
5558 /* The first instruction in the glink code needs to be
5559 cooked to to hold the correct offset in the toc. The
5560 rest are just output raw. */
5561 bfd_put_32 (output_bfd,
5562 bfd_xcoff_glink_code(output_bfd, 0) | (tocoff & 0xffff), p);
5564 /* Start with i == 1 to get past the first instruction done above
5565 The /4 is because the glink code is in bytes and we are going
5567 for (i = 1; i < bfd_xcoff_glink_code_size(output_bfd) / 4; i++)
5569 bfd_put_32 (output_bfd,
5570 (bfd_vma) bfd_xcoff_glink_code(output_bfd, i),
5575 /* If we created a TOC entry for this symbol, write out the required
5577 if ((h->flags & XCOFF_SET_TOC) != 0)
5582 struct internal_reloc *irel;
5583 struct internal_ldrel ldrel;
5584 struct internal_syment irsym;
5585 union internal_auxent iraux;
5587 tocsec = h->toc_section;
5588 osec = tocsec->output_section;
5589 oindx = osec->target_index;
5590 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5591 irel->r_vaddr = (osec->vma
5592 + tocsec->output_offset
5598 irel->r_symndx = h->indx;
5603 irel->r_symndx = obj_raw_syment_count (output_bfd);
5606 BFD_ASSERT (h->ldindx >= 0);
5608 /* Initialize the aux union here instead of closer to when it is
5609 written out below because the length of the csect depends on
5610 whether the output is 32 or 64 bit. */
5611 memset (&iraux, 0, sizeof iraux);
5612 iraux.x_csect.x_smtyp = XTY_SD;
5613 /* iraux.x_csect.x_scnlen.l = 4 or 8, see below */
5614 iraux.x_csect.x_smclas = XMC_TC;
5616 /* 32 bit uses a 32 bit R_POS to do the relocations
5617 64 bit uses a 64 bit R_POS to do the relocations
5619 Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit
5621 Which one is determined by the backend. */
5622 if (bfd_xcoff_is_xcoff64 (output_bfd))
5625 iraux.x_csect.x_scnlen.l = 8;
5627 else if (bfd_xcoff_is_xcoff32 (output_bfd))
5630 iraux.x_csect.x_scnlen.l = 4;
5636 irel->r_type = R_POS;
5637 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5638 ++osec->reloc_count;
5640 ldrel.l_vaddr = irel->r_vaddr;
5641 ldrel.l_symndx = h->ldindx;
5642 ldrel.l_rtype = (irel->r_size << 8) | R_POS;
5643 ldrel.l_rsecnm = oindx;
5644 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5645 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5647 /* We need to emit a symbol to define a csect which holds
5649 if (finfo->info->strip != strip_all)
5652 result = bfd_xcoff_put_symbol_name (output_bfd, finfo->strtab,
5653 &irsym, h->root.root.string);
5654 if (false == result)
5659 irsym.n_value = irel->r_vaddr;
5660 irsym.n_scnum = osec->target_index;
5661 irsym.n_sclass = C_HIDEXT;
5662 irsym.n_type = T_NULL;
5665 bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym);
5666 outsym += bfd_coff_symesz (output_bfd);
5668 /* note : iraux is initialized above */
5669 bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT,
5670 0, 1, (PTR) outsym);
5671 outsym += bfd_coff_auxesz (output_bfd);
5675 /* We aren't going to write out the symbols below, so we
5676 need to write them out now. */
5677 pos = obj_sym_filepos (output_bfd);
5678 pos += (obj_raw_syment_count (output_bfd)
5679 * bfd_coff_symesz (output_bfd));
5680 amt = outsym - finfo->outsyms;
5681 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5682 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5684 obj_raw_syment_count (output_bfd) +=
5685 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
5687 outsym = finfo->outsyms;
5692 /* If this symbol is a specially defined function descriptor, write
5693 it out. The first word is the address of the function code
5694 itself, the second word is the address of the TOC, and the third
5698 The addresses for the 32 bit will take 4 bytes and the addresses
5699 for 64 bit will take 8 bytes. Similar for the relocs. This type
5700 of logic was also done above to create a TOC entry in
5701 xcoff_write_global_symbol. */
5702 if ((h->flags & XCOFF_DESCRIPTOR) != 0
5703 && h->root.type == bfd_link_hash_defined
5704 && (h->root.u.def.section
5705 == xcoff_hash_table (finfo->info)->descriptor_section))
5711 struct xcoff_link_hash_entry *hentry;
5713 struct internal_reloc *irel;
5714 struct internal_ldrel ldrel;
5716 unsigned int reloc_size, byte_size;
5718 if (bfd_xcoff_is_xcoff64 (output_bfd))
5723 else if (bfd_xcoff_is_xcoff32 (output_bfd))
5733 sec = h->root.u.def.section;
5734 osec = sec->output_section;
5735 oindx = osec->target_index;
5736 p = sec->contents + h->root.u.def.value;
5738 hentry = h->descriptor;
5739 BFD_ASSERT (hentry != NULL
5740 && (hentry->root.type == bfd_link_hash_defined
5741 || hentry->root.type == bfd_link_hash_defweak));
5742 esec = hentry->root.u.def.section;
5744 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5745 irel->r_vaddr = (osec->vma
5746 + sec->output_offset
5747 + h->root.u.def.value);
5748 irel->r_symndx = esec->output_section->target_index;
5749 irel->r_type = R_POS;
5750 irel->r_size = reloc_size;
5751 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5752 ++osec->reloc_count;
5754 ldrel.l_vaddr = irel->r_vaddr;
5755 if (strcmp (esec->output_section->name, ".text") == 0)
5757 else if (strcmp (esec->output_section->name, ".data") == 0)
5759 else if (strcmp (esec->output_section->name, ".bss") == 0)
5763 (*_bfd_error_handler)
5764 (_("%s: loader reloc in unrecognized section `%s'"),
5765 bfd_get_filename (output_bfd),
5766 esec->output_section->name);
5767 bfd_set_error (bfd_error_nonrepresentable_section);
5770 ldrel.l_rtype = (reloc_size << 8) | R_POS;
5771 ldrel.l_rsecnm = oindx;
5772 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5773 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5775 /* There are three items to write out,
5776 the address of the code
5777 the address of the toc anchor
5778 the environment pointer.
5779 We are ignoring the environment pointer. So set it to zero. */
5780 if (bfd_xcoff_is_xcoff64 (output_bfd))
5782 bfd_put_64 (output_bfd,
5783 (esec->output_section->vma + esec->output_offset
5784 + hentry->root.u.def.value),
5786 bfd_put_64 (output_bfd, xcoff_data (output_bfd)->toc, p + 8);
5787 bfd_put_64 (output_bfd, (bfd_vma) 0, p + 16);
5792 This logic was already called above so the error case where
5793 the backend is neither has already been checked. */
5794 bfd_put_32 (output_bfd,
5795 (esec->output_section->vma + esec->output_offset
5796 + hentry->root.u.def.value),
5798 bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
5799 bfd_put_32 (output_bfd, (bfd_vma) 0, p + 8);
5802 tsec = coff_section_from_bfd_index (output_bfd,
5803 xcoff_data (output_bfd)->sntoc);
5806 irel->r_vaddr = (osec->vma
5807 + sec->output_offset
5808 + h->root.u.def.value
5810 irel->r_symndx = tsec->output_section->target_index;
5811 irel->r_type = R_POS;
5812 irel->r_size = reloc_size;
5813 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5814 ++osec->reloc_count;
5816 ldrel.l_vaddr = irel->r_vaddr;
5817 if (strcmp (tsec->output_section->name, ".text") == 0)
5819 else if (strcmp (tsec->output_section->name, ".data") == 0)
5821 else if (strcmp (tsec->output_section->name, ".bss") == 0)
5825 (*_bfd_error_handler)
5826 (_("%s: loader reloc in unrecognized section `%s'"),
5827 bfd_get_filename (output_bfd),
5828 tsec->output_section->name);
5829 bfd_set_error (bfd_error_nonrepresentable_section);
5832 ldrel.l_rtype = (reloc_size << 8) | R_POS;
5833 ldrel.l_rsecnm = oindx;
5834 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5835 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5838 if (h->indx >= 0 || finfo->info->strip == strip_all)
5840 BFD_ASSERT (outsym == finfo->outsyms);
5845 && (finfo->info->strip == strip_all
5846 || (finfo->info->strip == strip_some
5847 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
5848 false, false) == NULL)))
5850 BFD_ASSERT (outsym == finfo->outsyms);
5855 && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
5857 BFD_ASSERT (outsym == finfo->outsyms);
5861 memset (&aux, 0, sizeof aux);
5863 h->indx = obj_raw_syment_count (output_bfd);
5865 result = bfd_xcoff_put_symbol_name (output_bfd, finfo->strtab, &isym,
5866 h->root.root.string);
5867 if (false == result)
5872 if (h->root.type == bfd_link_hash_undefined
5873 || h->root.type == bfd_link_hash_undefweak)
5876 isym.n_scnum = N_UNDEF;
5877 isym.n_sclass = C_EXT;
5878 aux.x_csect.x_smtyp = XTY_ER;
5880 else if ((h->root.type == bfd_link_hash_defined
5881 || h->root.type == bfd_link_hash_defweak)
5882 && h->smclas == XMC_XO)
5884 BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section));
5885 isym.n_value = h->root.u.def.value;
5886 isym.n_scnum = N_UNDEF;
5887 isym.n_sclass = C_EXT;
5888 aux.x_csect.x_smtyp = XTY_ER;
5890 else if (h->root.type == bfd_link_hash_defined
5891 || h->root.type == bfd_link_hash_defweak)
5893 struct xcoff_link_size_list *l;
5895 isym.n_value = (h->root.u.def.section->output_section->vma
5896 + h->root.u.def.section->output_offset
5897 + h->root.u.def.value);
5898 isym.n_scnum = h->root.u.def.section->output_section->target_index;
5899 isym.n_sclass = C_HIDEXT;
5900 aux.x_csect.x_smtyp = XTY_SD;
5902 if ((h->flags & XCOFF_HAS_SIZE) != 0)
5904 for (l = xcoff_hash_table (finfo->info)->size_list;
5910 aux.x_csect.x_scnlen.l = l->size;
5916 else if (h->root.type == bfd_link_hash_common)
5918 isym.n_value = (h->root.u.c.p->section->output_section->vma
5919 + h->root.u.c.p->section->output_offset);
5920 isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
5921 isym.n_sclass = C_EXT;
5922 aux.x_csect.x_smtyp = XTY_CM;
5923 aux.x_csect.x_scnlen.l = h->root.u.c.size;
5928 isym.n_type = T_NULL;
5931 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5932 outsym += bfd_coff_symesz (output_bfd);
5934 aux.x_csect.x_smclas = h->smclas;
5935 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
5937 outsym += bfd_coff_auxesz (output_bfd);
5939 if ((h->root.type == bfd_link_hash_defined
5940 || h->root.type == bfd_link_hash_defweak)
5941 && h->smclas != XMC_XO)
5943 /* We just output an SD symbol. Now output an LD symbol. */
5947 isym.n_sclass = C_EXT;
5948 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5949 outsym += bfd_coff_symesz (output_bfd);
5951 aux.x_csect.x_smtyp = XTY_LD;
5952 aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
5953 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
5955 outsym += bfd_coff_auxesz (output_bfd);
5958 pos = obj_sym_filepos (output_bfd);
5959 pos += obj_raw_syment_count (output_bfd) * bfd_coff_symesz (output_bfd);
5960 amt = outsym - finfo->outsyms;
5961 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5962 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5964 obj_raw_syment_count (output_bfd) +=
5965 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
5970 /* Handle a link order which is supposed to generate a reloc. */
5973 xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
5975 struct xcoff_final_link_info *finfo;
5976 asection *output_section;
5977 struct bfd_link_order *link_order;
5979 reloc_howto_type *howto;
5980 struct xcoff_link_hash_entry *h;
5984 struct internal_reloc *irel;
5985 struct xcoff_link_hash_entry **rel_hash_ptr;
5986 struct internal_ldrel ldrel;
5988 if (link_order->type == bfd_section_reloc_link_order)
5990 /* We need to somehow locate a symbol in the right section. The
5991 symbol must either have a value of zero, or we must adjust
5992 the addend by the value of the symbol. FIXME: Write this
5993 when we need it. The old linker couldn't handle this anyhow. */
5997 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
6000 bfd_set_error (bfd_error_bad_value);
6004 h = ((struct xcoff_link_hash_entry *)
6005 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
6006 link_order->u.reloc.p->u.name,
6007 false, false, true));
6010 if (! ((*finfo->info->callbacks->unattached_reloc)
6011 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
6012 (asection *) NULL, (bfd_vma) 0)))
6017 if (h->root.type == bfd_link_hash_common)
6019 hsec = h->root.u.c.p->section;
6022 else if (h->root.type == bfd_link_hash_defined
6023 || h->root.type == bfd_link_hash_defweak)
6025 hsec = h->root.u.def.section;
6026 hval = h->root.u.def.value;
6034 addend = link_order->u.reloc.p->addend;
6036 addend += (hsec->output_section->vma
6037 + hsec->output_offset
6044 bfd_reloc_status_type rstat;
6047 size = bfd_get_reloc_size (howto);
6048 buf = (bfd_byte *) bfd_zmalloc (size);
6052 rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
6058 case bfd_reloc_outofrange:
6060 case bfd_reloc_overflow:
6061 if (! ((*finfo->info->callbacks->reloc_overflow)
6062 (finfo->info, link_order->u.reloc.p->u.name,
6063 howto->name, addend, (bfd *) NULL, (asection *) NULL,
6071 ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
6072 (file_ptr) link_order->offset, size);
6078 /* Store the reloc information in the right place. It will get
6079 swapped and written out at the end of the final_link routine. */
6081 irel = (finfo->section_info[output_section->target_index].relocs
6082 + output_section->reloc_count);
6083 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
6084 + output_section->reloc_count);
6086 memset (irel, 0, sizeof (struct internal_reloc));
6087 *rel_hash_ptr = NULL;
6089 irel->r_vaddr = output_section->vma + link_order->offset;
6092 irel->r_symndx = h->indx;
6095 /* Set the index to -2 to force this symbol to get written out. */
6101 irel->r_type = howto->type;
6102 irel->r_size = howto->bitsize - 1;
6103 if (howto->complain_on_overflow == complain_overflow_signed)
6104 irel->r_size |= 0x80;
6106 ++output_section->reloc_count;
6108 /* Now output the reloc to the .loader section. */
6110 ldrel.l_vaddr = irel->r_vaddr;
6114 const char *secname;
6116 secname = hsec->output_section->name;
6118 if (strcmp (secname, ".text") == 0)
6120 else if (strcmp (secname, ".data") == 0)
6122 else if (strcmp (secname, ".bss") == 0)
6126 (*_bfd_error_handler)
6127 (_("%s: loader reloc in unrecognized section `%s'"),
6128 bfd_get_filename (output_bfd), secname);
6129 bfd_set_error (bfd_error_nonrepresentable_section);
6137 (*_bfd_error_handler)
6138 (_("%s: `%s' in loader reloc but not loader sym"),
6139 bfd_get_filename (output_bfd),
6140 h->root.root.string);
6141 bfd_set_error (bfd_error_bad_value);
6144 ldrel.l_symndx = h->ldindx;
6147 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
6148 ldrel.l_rsecnm = output_section->target_index;
6149 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
6150 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
6155 /* Sort relocs by VMA. This is called via qsort. */
6158 xcoff_sort_relocs (p1, p2)
6162 const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
6163 const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
6165 if (r1->r_vaddr > r2->r_vaddr)
6167 else if (r1->r_vaddr < r2->r_vaddr)