AMD64 - Fix format conversions and other warnings.
[dragonfly.git] / contrib / gdb-6.2.1 / bfd / xcofflink.c
blob2d195ca78ca4974bfe92b91937f01fb428d08390
1 /* POWER/PowerPC XCOFF linker support.
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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. */
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "coff/internal.h"
27 #include "coff/xcoff.h"
28 #include "libcoff.h"
29 #include "libxcoff.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;
46 /* The path. */
47 const char *path;
48 /* The file name. */
49 const char *file;
50 /* The member name. */
51 const char *member;
54 /* Information we keep for each section in the output file during the
55 final link phase. */
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;
72 } *toc_rel_hashes;
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;
81 /* Output BFD. */
82 bfd *output_bfd;
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). */
89 long last_file_index;
90 /* Contents of last C_FILE symbol. */
91 struct internal_syment last_file;
92 /* Symbol index of TOC symbol. */
93 long toc_symindx;
94 /* Start of .loader symbols. */
95 bfd_byte *ldsym;
96 /* Next .loader reloc to swap out. */
97 bfd_byte *ldrel;
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
103 input file. */
104 long *sym_indices;
105 /* Buffer large enough to hold output symbols for any input file. */
106 bfd_byte *outsyms;
107 /* Buffer large enough to hold external line numbers for any input
108 section. */
109 bfd_byte *linenos;
110 /* Buffer large enough to hold any input section. */
111 bfd_byte *contents;
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 bfd_boolean xcoff_get_section_contents PARAMS ((bfd *, asection *));
119 static struct internal_reloc *xcoff_read_internal_relocs
120 PARAMS ((bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
121 struct internal_reloc *));
122 static bfd_boolean xcoff_link_add_object_symbols
123 PARAMS ((bfd *, struct bfd_link_info *));
124 static bfd_boolean xcoff_link_check_archive_element
125 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *));
126 static bfd_boolean xcoff_link_check_ar_symbols
127 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *));
128 static bfd_boolean xcoff_link_check_dynamic_ar_symbols
129 PARAMS ((bfd *, struct bfd_link_info *, bfd_boolean *));
130 static bfd_size_type xcoff_find_reloc
131 PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
132 static bfd_boolean xcoff_link_add_symbols
133 PARAMS ((bfd *, struct bfd_link_info *));
134 static bfd_boolean xcoff_link_add_dynamic_symbols
135 PARAMS ((bfd *, struct bfd_link_info *));
136 static bfd_boolean xcoff_mark_symbol
137 PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *));
138 static bfd_boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
139 static void xcoff_sweep PARAMS ((struct bfd_link_info *));
140 static bfd_boolean xcoff_build_ldsyms
141 PARAMS ((struct xcoff_link_hash_entry *, PTR));
142 static bfd_boolean xcoff_link_input_bfd
143 PARAMS ((struct xcoff_final_link_info *, bfd *));
144 static bfd_boolean xcoff_write_global_symbol
145 PARAMS ((struct xcoff_link_hash_entry *, PTR));
146 static bfd_boolean xcoff_reloc_link_order
147 PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
148 struct bfd_link_order *));
149 static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
152 /* Routines to read XCOFF dynamic information. This don't really
153 belong here, but we already have the ldsym manipulation routines
154 here. */
156 /* Read the contents of a section. */
158 static bfd_boolean
159 xcoff_get_section_contents (abfd, sec)
160 bfd *abfd;
161 asection *sec;
164 if (coff_section_data (abfd, sec) == NULL)
166 bfd_size_type amt = sizeof (struct coff_section_tdata);
167 sec->used_by_bfd = bfd_zalloc (abfd, amt);
168 if (sec->used_by_bfd == NULL)
169 return FALSE;
172 if (coff_section_data (abfd, sec)->contents == NULL)
174 bfd_byte *contents;
175 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
177 if (contents != NULL)
178 free (contents);
179 return FALSE;
181 coff_section_data (abfd, sec)->contents = contents;
184 return TRUE;
187 /* Get the size required to hold the dynamic symbols. */
189 long
190 _bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
191 bfd *abfd;
193 asection *lsec;
194 bfd_byte *contents;
195 struct internal_ldhdr ldhdr;
197 if ((abfd->flags & DYNAMIC) == 0)
199 bfd_set_error (bfd_error_invalid_operation);
200 return -1;
203 lsec = bfd_get_section_by_name (abfd, ".loader");
204 if (lsec == NULL)
206 bfd_set_error (bfd_error_no_symbols);
207 return -1;
210 if (! xcoff_get_section_contents (abfd, lsec))
211 return -1;
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. */
221 long
222 _bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
223 bfd *abfd;
224 asymbol **psyms;
226 asection *lsec;
227 bfd_byte *contents;
228 struct internal_ldhdr ldhdr;
229 const char *strings;
230 bfd_byte *elsym, *elsymend;
231 coff_symbol_type *symbuf;
233 if ((abfd->flags & DYNAMIC) == 0)
235 bfd_set_error (bfd_error_invalid_operation);
236 return -1;
239 lsec = bfd_get_section_by_name (abfd, ".loader");
240 if (lsec == NULL)
242 bfd_set_error (bfd_error_no_symbols);
243 return -1;
246 if (! xcoff_get_section_contents (abfd, lsec))
247 return -1;
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)));
258 if (symbuf == NULL)
259 return -1;
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;
274 else
276 char *c;
278 c = bfd_alloc (abfd, (bfd_size_type) SYMNMLEN + 1);
279 if (c == NULL)
280 return -1;
281 memcpy (c, ldsym._l._l_name, SYMNMLEN);
282 c[SYMNMLEN] = '\0';
283 symbuf->symbol.name = c;
286 if (ldsym.l_smclas == XMC_XO)
287 symbuf->symbol.section = bfd_abs_section_ptr;
288 else
289 symbuf->symbol.section = coff_section_from_bfd_index (abfd,
290 ldsym.l_scnum);
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;
303 *psyms = NULL;
305 return ldhdr.l_nsyms;
308 /* Get the size required to hold the dynamic relocs. */
310 long
311 _bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
312 bfd *abfd;
314 asection *lsec;
315 bfd_byte *contents;
316 struct internal_ldhdr ldhdr;
318 if ((abfd->flags & DYNAMIC) == 0)
320 bfd_set_error (bfd_error_invalid_operation);
321 return -1;
324 lsec = bfd_get_section_by_name (abfd, ".loader");
325 if (lsec == NULL)
327 bfd_set_error (bfd_error_no_symbols);
328 return -1;
331 if (! xcoff_get_section_contents (abfd, lsec))
332 return -1;
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. */
342 long
343 _bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
344 bfd *abfd;
345 arelent **prelocs;
346 asymbol **syms;
348 asection *lsec;
349 bfd_byte *contents;
350 struct internal_ldhdr ldhdr;
351 arelent *relbuf;
352 bfd_byte *elrel, *elrelend;
354 if ((abfd->flags & DYNAMIC) == 0)
356 bfd_set_error (bfd_error_invalid_operation);
357 return -1;
360 lsec = bfd_get_section_by_name (abfd, ".loader");
361 if (lsec == NULL)
363 bfd_set_error (bfd_error_no_symbols);
364 return -1;
367 if (! xcoff_get_section_contents (abfd, lsec))
368 return -1;
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));
374 if (relbuf == NULL)
375 return -1;
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++,
381 prelocs++)
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);
389 else
391 const char *name;
392 asection *sec;
394 switch (ldrel.l_symndx)
396 case 0:
397 name = ".text";
398 break;
399 case 1:
400 name = ".data";
401 break;
402 case 2:
403 name = ".bss";
404 break;
405 default:
406 abort ();
407 break;
410 sec = bfd_get_section_by_name (abfd, name);
411 if (sec == NULL)
413 bfd_set_error (bfd_error_bad_value);
414 return -1;
417 relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
420 relbuf->address = ldrel.l_vaddr;
421 relbuf->addend = 0;
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. */
430 *prelocs = relbuf;
433 *prelocs = NULL;
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;
444 const char *string;
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
449 subclass. */
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,
459 table, string));
460 if (ret != NULL)
462 /* Set local fields. */
463 ret->indx = -1;
464 ret->toc_section = NULL;
465 ret->u.toc_indx = -1;
466 ret->descriptor = NULL;
467 ret->ldsym = NULL;
468 ret->ldindx = -1;
469 ret->flags = 0;
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)
480 bfd *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_malloc (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 free (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;
502 ret->imports = NULL;
503 ret->file_align = 0;
504 ret->textro = FALSE;
505 ret->gc = FALSE;
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
510 called. */
511 xcoff_data (abfd)->full_aouthdr = TRUE;
513 return &ret->root;
516 /* Free a XCOFF link hash table. */
518 void
519 _bfd_xcoff_bfd_link_hash_table_free (hash)
520 struct bfd_link_hash_table *hash;
522 struct xcoff_link_hash_table *ret = (struct xcoff_link_hash_table *) hash;
524 _bfd_stringtab_free (ret->debug_strtab);
525 bfd_hash_table_free (&ret->root.table);
526 free (ret);
529 /* Read internal relocs for an XCOFF csect. This is a wrapper around
530 _bfd_coff_read_internal_relocs which tries to take advantage of any
531 relocs which may have been cached for the enclosing section. */
533 static struct internal_reloc *
534 xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
535 require_internal, internal_relocs)
536 bfd *abfd;
537 asection *sec;
538 bfd_boolean cache;
539 bfd_byte *external_relocs;
540 bfd_boolean require_internal;
541 struct internal_reloc *internal_relocs;
544 if (coff_section_data (abfd, sec) != NULL
545 && coff_section_data (abfd, sec)->relocs == NULL
546 && xcoff_section_data (abfd, sec) != NULL)
548 asection *enclosing;
550 enclosing = xcoff_section_data (abfd, sec)->enclosing;
552 if (enclosing != NULL
553 && (coff_section_data (abfd, enclosing) == NULL
554 || coff_section_data (abfd, enclosing)->relocs == NULL)
555 && cache
556 && enclosing->reloc_count > 0)
558 if (_bfd_coff_read_internal_relocs (abfd, enclosing, TRUE,
559 external_relocs, FALSE,
560 (struct internal_reloc *) NULL)
561 == NULL)
562 return NULL;
565 if (enclosing != NULL
566 && coff_section_data (abfd, enclosing) != NULL
567 && coff_section_data (abfd, enclosing)->relocs != NULL)
569 size_t off;
571 off = ((sec->rel_filepos - enclosing->rel_filepos)
572 / bfd_coff_relsz (abfd));
574 if (! require_internal)
575 return coff_section_data (abfd, enclosing)->relocs + off;
576 memcpy (internal_relocs,
577 coff_section_data (abfd, enclosing)->relocs + off,
578 sec->reloc_count * sizeof (struct internal_reloc));
579 return internal_relocs;
583 return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
584 require_internal, internal_relocs);
587 /* Given an XCOFF BFD, add symbols to the global hash table as
588 appropriate. */
590 bfd_boolean
591 _bfd_xcoff_bfd_link_add_symbols (abfd, info)
592 bfd *abfd;
593 struct bfd_link_info *info;
596 switch (bfd_get_format (abfd))
598 case bfd_object:
599 return xcoff_link_add_object_symbols (abfd, info);
601 case bfd_archive:
602 /* If the archive has a map, do the usual search. We then need
603 to check the archive for dynamic objects, because they may not
604 appear in the archive map even though they should, perhaps, be
605 included. If the archive has no map, we just consider each object
606 file in turn, since that apparently is what the AIX native linker
607 does. */
608 if (bfd_has_map (abfd))
610 if (! (_bfd_generic_link_add_archive_symbols
611 (abfd, info, xcoff_link_check_archive_element)))
612 return FALSE;
616 bfd *member;
618 member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
619 while (member != NULL)
621 if (bfd_check_format (member, bfd_object)
622 && (info->hash->creator == member->xvec)
623 && (! bfd_has_map (abfd) || (member->flags & DYNAMIC) != 0))
625 bfd_boolean needed;
627 if (! xcoff_link_check_archive_element (member, info,
628 &needed))
629 return FALSE;
630 if (needed)
631 member->archive_pass = -1;
633 member = bfd_openr_next_archived_file (abfd, member);
637 return TRUE;
639 default:
640 bfd_set_error (bfd_error_wrong_format);
641 return FALSE;
645 /* Add symbols from an XCOFF object file. */
647 static bfd_boolean
648 xcoff_link_add_object_symbols (abfd, info)
649 bfd *abfd;
650 struct bfd_link_info *info;
653 if (! _bfd_coff_get_external_symbols (abfd))
654 return FALSE;
655 if (! xcoff_link_add_symbols (abfd, info))
656 return FALSE;
657 if (! info->keep_memory)
659 if (! _bfd_coff_free_symbols (abfd))
660 return FALSE;
662 return TRUE;
665 /* Check a single archive element to see if we need to include it in
666 the link. *PNEEDED is set according to whether this element is
667 needed in the link or not. This is called via
668 _bfd_generic_link_add_archive_symbols. */
670 static bfd_boolean
671 xcoff_link_check_archive_element (abfd, info, pneeded)
672 bfd *abfd;
673 struct bfd_link_info *info;
674 bfd_boolean *pneeded;
677 if (! _bfd_coff_get_external_symbols (abfd))
678 return FALSE;
680 if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
681 return FALSE;
683 if (*pneeded)
685 if (! xcoff_link_add_symbols (abfd, info))
686 return FALSE;
689 if (! info->keep_memory || ! *pneeded)
691 if (! _bfd_coff_free_symbols (abfd))
692 return FALSE;
695 return TRUE;
698 /* Look through the symbols to see if this object file should be
699 included in the link. */
701 static bfd_boolean
702 xcoff_link_check_ar_symbols (abfd, info, pneeded)
703 bfd *abfd;
704 struct bfd_link_info *info;
705 bfd_boolean *pneeded;
707 bfd_size_type symesz;
708 bfd_byte *esym;
709 bfd_byte *esym_end;
711 *pneeded = FALSE;
713 if ((abfd->flags & DYNAMIC) != 0
714 && ! info->static_link
715 && info->hash->creator == abfd->xvec)
716 return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
718 symesz = bfd_coff_symesz (abfd);
719 esym = (bfd_byte *) obj_coff_external_syms (abfd);
720 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
721 while (esym < esym_end)
723 struct internal_syment sym;
725 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
727 if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
729 const char *name;
730 char buf[SYMNMLEN + 1];
731 struct bfd_link_hash_entry *h;
733 /* This symbol is externally visible, and is defined by this
734 object file. */
736 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
738 if (name == NULL)
739 return FALSE;
740 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
742 /* We are only interested in symbols that are currently
743 undefined. If a symbol is currently known to be common,
744 XCOFF linkers do not bring in an object file which
745 defines it. We also don't bring in symbols to satisfy
746 undefined references in shared objects. */
747 if (h != (struct bfd_link_hash_entry *) NULL
748 && h->type == bfd_link_hash_undefined
749 && (info->hash->creator != abfd->xvec
750 || (((struct xcoff_link_hash_entry *) h)->flags
751 & XCOFF_DEF_DYNAMIC) == 0))
753 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
754 return FALSE;
755 *pneeded = TRUE;
756 return TRUE;
760 esym += (sym.n_numaux + 1) * symesz;
763 /* We do not need this object file. */
764 return TRUE;
767 /* Look through the loader symbols to see if this dynamic object
768 should be included in the link. The native linker uses the loader
769 symbols, not the normal symbol table, so we do too. */
771 static bfd_boolean
772 xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
773 bfd *abfd;
774 struct bfd_link_info *info;
775 bfd_boolean *pneeded;
777 asection *lsec;
778 bfd_byte *contents;
779 struct internal_ldhdr ldhdr;
780 const char *strings;
781 bfd_byte *elsym, *elsymend;
783 *pneeded = FALSE;
785 lsec = bfd_get_section_by_name (abfd, ".loader");
786 if (lsec == NULL)
788 /* There are no symbols, so don't try to include it. */
789 return TRUE;
792 if (! xcoff_get_section_contents (abfd, lsec))
793 return FALSE;
794 contents = coff_section_data (abfd, lsec)->contents;
796 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
798 strings = (char *) contents + ldhdr.l_stoff;
800 elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr);
802 elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd);
803 for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd))
805 struct internal_ldsym ldsym;
806 char nambuf[SYMNMLEN + 1];
807 const char *name;
808 struct bfd_link_hash_entry *h;
810 bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
812 /* We are only interested in exported symbols. */
813 if ((ldsym.l_smtype & L_EXPORT) == 0)
814 continue;
816 if (ldsym._l._l_l._l_zeroes == 0)
817 name = strings + ldsym._l._l_l._l_offset;
818 else
820 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
821 nambuf[SYMNMLEN] = '\0';
822 name = nambuf;
825 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
827 /* We are only interested in symbols that are currently
828 undefined. At this point we know that we are using an XCOFF
829 hash table. */
830 if (h != NULL
831 && h->type == bfd_link_hash_undefined
832 && (((struct xcoff_link_hash_entry *) h)->flags
833 & XCOFF_DEF_DYNAMIC) == 0)
835 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
836 return FALSE;
837 *pneeded = TRUE;
838 return TRUE;
842 /* We do not need this shared object. */
844 if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
846 free (coff_section_data (abfd, lsec)->contents);
847 coff_section_data (abfd, lsec)->contents = NULL;
850 return TRUE;
853 /* Returns the index of reloc in RELOCS with the least address greater
854 than or equal to ADDRESS. The relocs are sorted by address. */
856 static bfd_size_type
857 xcoff_find_reloc (relocs, count, address)
858 struct internal_reloc *relocs;
859 bfd_size_type count;
860 bfd_vma address;
862 bfd_size_type min, max, this;
864 if (count < 2)
866 if (count == 1 && relocs[0].r_vaddr < address)
867 return 1;
868 else
869 return 0;
872 min = 0;
873 max = count;
875 /* Do a binary search over (min,max]. */
876 while (min + 1 < max)
878 bfd_vma raddr;
880 this = (max + min) / 2;
881 raddr = relocs[this].r_vaddr;
882 if (raddr > address)
883 max = this;
884 else if (raddr < address)
885 min = this;
886 else
888 min = this;
889 break;
893 if (relocs[min].r_vaddr < address)
894 return min + 1;
896 while (min > 0
897 && relocs[min - 1].r_vaddr == address)
898 --min;
900 return min;
904 /* xcoff_link_create_extra_sections
906 Takes care of creating the .loader, .gl, .ds, .debug and sections. */
908 static bfd_boolean
909 xcoff_link_create_extra_sections(bfd * abfd, struct bfd_link_info *info)
912 bfd_boolean return_value = FALSE;
914 if (info->hash->creator == abfd->xvec)
917 /* We need to build a .loader section, so we do it here. This
918 won't work if we're producing an XCOFF output file with no
919 XCOFF input files. FIXME. */
921 if (xcoff_hash_table (info)->loader_section == NULL)
923 asection *lsec;
925 lsec = bfd_make_section_anyway (abfd, ".loader");
926 if (lsec == NULL)
928 goto end_return;
930 xcoff_hash_table (info)->loader_section = lsec;
931 lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
934 /* Likewise for the linkage section. */
935 if (xcoff_hash_table (info)->linkage_section == NULL)
937 asection *lsec;
939 lsec = bfd_make_section_anyway (abfd, ".gl");
940 if (lsec == NULL)
942 goto end_return;
945 xcoff_hash_table (info)->linkage_section = lsec;
946 lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
947 | SEC_IN_MEMORY);
948 lsec->alignment_power = 2;
951 /* Likewise for the TOC section. */
952 if (xcoff_hash_table (info)->toc_section == NULL)
954 asection *tsec;
956 tsec = bfd_make_section_anyway (abfd, ".tc");
957 if (tsec == NULL)
959 goto end_return;
962 xcoff_hash_table (info)->toc_section = tsec;
963 tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
964 | SEC_IN_MEMORY);
965 tsec->alignment_power = 2;
968 /* Likewise for the descriptor section. */
969 if (xcoff_hash_table (info)->descriptor_section == NULL)
971 asection *dsec;
973 dsec = bfd_make_section_anyway (abfd, ".ds");
974 if (dsec == NULL)
976 goto end_return;
979 xcoff_hash_table (info)->descriptor_section = dsec;
980 dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
981 | SEC_IN_MEMORY);
982 dsec->alignment_power = 2;
985 /* Likewise for the .debug section. */
986 if (xcoff_hash_table (info)->debug_section == NULL
987 && info->strip != strip_all)
989 asection *dsec;
991 dsec = bfd_make_section_anyway (abfd, ".debug");
992 if (dsec == NULL)
994 goto end_return;
996 xcoff_hash_table (info)->debug_section = dsec;
997 dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
1001 return_value = TRUE;
1003 end_return:
1005 return return_value;
1008 /* Add all the symbols from an object file to the hash table.
1010 XCOFF is a weird format. A normal XCOFF .o files will have three
1011 COFF sections--.text, .data, and .bss--but each COFF section will
1012 contain many csects. These csects are described in the symbol
1013 table. From the linker's point of view, each csect must be
1014 considered a section in its own right. For example, a TOC entry is
1015 handled as a small XMC_TC csect. The linker must be able to merge
1016 different TOC entries together, which means that it must be able to
1017 extract the XMC_TC csects from the .data section of the input .o
1018 file.
1020 From the point of view of our linker, this is, of course, a hideous
1021 nightmare. We cope by actually creating sections for each csect,
1022 and discarding the original sections. We then have to handle the
1023 relocation entries carefully, since the only way to tell which
1024 csect they belong to is to examine the address. */
1026 static bfd_boolean
1027 xcoff_link_add_symbols (abfd, info)
1028 bfd *abfd;
1029 struct bfd_link_info *info;
1031 unsigned int n_tmask;
1032 unsigned int n_btshft;
1033 bfd_boolean default_copy;
1034 bfd_size_type symcount;
1035 struct xcoff_link_hash_entry **sym_hash;
1036 asection **csect_cache;
1037 bfd_size_type linesz;
1038 asection *o;
1039 asection *last_real;
1040 bfd_boolean keep_syms;
1041 asection *csect;
1042 unsigned int csect_index;
1043 asection *first_csect;
1044 bfd_size_type symesz;
1045 bfd_byte *esym;
1046 bfd_byte *esym_end;
1047 struct reloc_info_struct
1049 struct internal_reloc *relocs;
1050 asection **csects;
1051 bfd_byte *linenos;
1052 } *reloc_info = NULL;
1053 bfd_size_type amt;
1055 keep_syms = obj_coff_keep_syms (abfd);
1057 if ((abfd->flags & DYNAMIC) != 0
1058 && ! info->static_link)
1060 if (! xcoff_link_add_dynamic_symbols (abfd, info))
1061 return FALSE;
1064 /* create the loader, toc, gl, ds and debug sections, if needed */
1065 if (! xcoff_link_create_extra_sections (abfd, info))
1066 goto error_return;
1068 if ((abfd->flags & DYNAMIC) != 0
1069 && ! info->static_link)
1070 return TRUE;
1072 n_tmask = coff_data (abfd)->local_n_tmask;
1073 n_btshft = coff_data (abfd)->local_n_btshft;
1075 /* Define macros so that ISFCN, et. al., macros work correctly. */
1076 #define N_TMASK n_tmask
1077 #define N_BTSHFT n_btshft
1079 if (info->keep_memory)
1080 default_copy = FALSE;
1081 else
1082 default_copy = TRUE;
1084 symcount = obj_raw_syment_count (abfd);
1086 /* We keep a list of the linker hash table entries that correspond
1087 to each external symbol. */
1088 amt = symcount * sizeof (struct xcoff_link_hash_entry *);
1089 sym_hash = (struct xcoff_link_hash_entry **) bfd_zalloc (abfd, amt);
1090 if (sym_hash == NULL && symcount != 0)
1091 goto error_return;
1092 coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
1094 /* Because of the weird stuff we are doing with XCOFF csects, we can
1095 not easily determine which section a symbol is in, so we store
1096 the information in the tdata for the input file. */
1097 amt = symcount * sizeof (asection *);
1098 csect_cache = (asection **) bfd_zalloc (abfd, amt);
1099 if (csect_cache == NULL && symcount != 0)
1100 goto error_return;
1101 xcoff_data (abfd)->csects = csect_cache;
1103 /* While splitting sections into csects, we need to assign the
1104 relocs correctly. The relocs and the csects must both be in
1105 order by VMA within a given section, so we handle this by
1106 scanning along the relocs as we process the csects. We index
1107 into reloc_info using the section target_index. */
1108 amt = abfd->section_count + 1;
1109 amt *= sizeof (struct reloc_info_struct);
1110 reloc_info = (struct reloc_info_struct *) bfd_zmalloc (amt);
1111 if (reloc_info == NULL)
1112 goto error_return;
1114 /* Read in the relocs and line numbers for each section. */
1115 linesz = bfd_coff_linesz (abfd);
1116 last_real = NULL;
1117 for (o = abfd->sections; o != NULL; o = o->next)
1120 last_real = o;
1121 if ((o->flags & SEC_RELOC) != 0)
1124 reloc_info[o->target_index].relocs =
1125 xcoff_read_internal_relocs (abfd, o, TRUE, (bfd_byte *) NULL,
1126 FALSE, (struct internal_reloc *) NULL);
1127 amt = o->reloc_count;
1128 amt *= sizeof (asection *);
1129 reloc_info[o->target_index].csects = (asection **) bfd_zmalloc (amt);
1130 if (reloc_info[o->target_index].csects == NULL)
1131 goto error_return;
1134 if ((info->strip == strip_none || info->strip == strip_some)
1135 && o->lineno_count > 0)
1138 bfd_byte *linenos;
1140 amt = linesz * o->lineno_count;
1141 linenos = (bfd_byte *) bfd_malloc (amt);
1142 if (linenos == NULL)
1143 goto error_return;
1144 reloc_info[o->target_index].linenos = linenos;
1145 if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
1146 || bfd_bread (linenos, amt, abfd) != amt)
1147 goto error_return;
1152 /* Don't let the linker relocation routines discard the symbols. */
1153 obj_coff_keep_syms (abfd) = TRUE;
1155 csect = NULL;
1156 csect_index = 0;
1157 first_csect = NULL;
1159 symesz = bfd_coff_symesz (abfd);
1160 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
1161 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1162 esym_end = esym + symcount * symesz;
1164 while (esym < esym_end)
1166 struct internal_syment sym;
1167 union internal_auxent aux;
1168 const char *name;
1169 char buf[SYMNMLEN + 1];
1170 int smtyp;
1171 flagword flags;
1172 asection *section;
1173 bfd_vma value;
1174 struct xcoff_link_hash_entry *set_toc;
1176 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1178 /* In this pass we are only interested in symbols with csect
1179 information. */
1180 if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
1183 /* Set csect_cache,
1184 Normally csect is a .pr, .rw etc. created in the loop
1185 If C_FILE or first time, handle special
1187 Advance esym, sym_hash, csect_hash ptr's
1188 Keep track of the last_symndx for the current file. */
1189 if (sym.n_sclass == C_FILE && csect != NULL)
1191 xcoff_section_data (abfd, csect)->last_symndx =
1192 ((esym
1193 - (bfd_byte *) obj_coff_external_syms (abfd))
1194 / symesz);
1195 csect = NULL;
1198 if (csect != NULL)
1199 *csect_cache = csect;
1200 else if (first_csect == NULL || sym.n_sclass == C_FILE)
1201 *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
1202 else
1203 *csect_cache = NULL;
1204 esym += (sym.n_numaux + 1) * symesz;
1205 sym_hash += sym.n_numaux + 1;
1206 csect_cache += sym.n_numaux + 1;
1208 continue;
1211 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1213 if (name == NULL)
1214 goto error_return;
1216 /* If this symbol has line number information attached to it,
1217 and we're not stripping it, count the number of entries and
1218 add them to the count for this csect. In the final link pass
1219 we are going to attach line number information by symbol,
1220 rather than by section, in order to more easily handle
1221 garbage collection. */
1222 if ((info->strip == strip_none || info->strip == strip_some)
1223 && sym.n_numaux > 1
1224 && csect != NULL
1225 && ISFCN (sym.n_type))
1228 union internal_auxent auxlin;
1230 bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
1231 sym.n_type, sym.n_sclass,
1232 0, sym.n_numaux, (PTR) &auxlin);
1234 if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
1236 asection *enclosing;
1237 bfd_signed_vma linoff;
1239 enclosing = xcoff_section_data (abfd, csect)->enclosing;
1240 if (enclosing == NULL)
1242 (*_bfd_error_handler)
1243 (_("%s: `%s' has line numbers but no enclosing section"),
1244 bfd_archive_filename (abfd), name);
1245 bfd_set_error (bfd_error_bad_value);
1246 goto error_return;
1248 linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
1249 - enclosing->line_filepos);
1250 /* explicit cast to bfd_signed_vma for compiler */
1251 if (linoff < (bfd_signed_vma) (enclosing->lineno_count * linesz))
1253 struct internal_lineno lin;
1254 bfd_byte *linpstart;
1256 linpstart = (reloc_info[enclosing->target_index].linenos
1257 + linoff);
1258 bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
1259 if (lin.l_lnno == 0
1260 && ((bfd_size_type) lin.l_addr.l_symndx
1261 == ((esym
1262 - (bfd_byte *) obj_coff_external_syms (abfd))
1263 / symesz)))
1265 bfd_byte *linpend, *linp;
1267 linpend = (reloc_info[enclosing->target_index].linenos
1268 + enclosing->lineno_count * linesz);
1269 for (linp = linpstart + linesz;
1270 linp < linpend;
1271 linp += linesz)
1273 bfd_coff_swap_lineno_in (abfd, (PTR) linp,
1274 (PTR) &lin);
1275 if (lin.l_lnno == 0)
1276 break;
1278 csect->lineno_count += (linp - linpstart) / linesz;
1279 /* The setting of line_filepos will only be
1280 useful if all the line number entries for a
1281 csect are contiguous; this only matters for
1282 error reporting. */
1283 if (csect->line_filepos == 0)
1284 csect->line_filepos =
1285 auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
1291 /* Pick up the csect auxiliary information. */
1293 if (sym.n_numaux == 0)
1295 (*_bfd_error_handler)
1296 (_("%s: class %d symbol `%s' has no aux entries"),
1297 bfd_archive_filename (abfd), sym.n_sclass, name);
1298 bfd_set_error (bfd_error_bad_value);
1299 goto error_return;
1302 bfd_coff_swap_aux_in (abfd,
1303 (PTR) (esym + symesz * sym.n_numaux),
1304 sym.n_type, sym.n_sclass,
1305 sym.n_numaux - 1, sym.n_numaux,
1306 (PTR) &aux);
1308 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
1310 flags = BSF_GLOBAL;
1311 section = NULL;
1312 value = 0;
1313 set_toc = NULL;
1315 switch (smtyp)
1317 default:
1318 (*_bfd_error_handler)
1319 (_("%s: symbol `%s' has unrecognized csect type %d"),
1320 bfd_archive_filename (abfd), name, smtyp);
1321 bfd_set_error (bfd_error_bad_value);
1322 goto error_return;
1324 case XTY_ER:
1325 /* This is an external reference. */
1326 if (sym.n_sclass == C_HIDEXT
1327 || sym.n_scnum != N_UNDEF
1328 || aux.x_csect.x_scnlen.l != 0)
1330 (*_bfd_error_handler)
1331 (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"),
1332 bfd_archive_filename (abfd), name, sym.n_sclass, sym.n_scnum,
1333 aux.x_csect.x_scnlen.l);
1334 bfd_set_error (bfd_error_bad_value);
1335 goto error_return;
1338 /* An XMC_XO external reference is actually a reference to
1339 an absolute location. */
1340 if (aux.x_csect.x_smclas != XMC_XO)
1341 section = bfd_und_section_ptr;
1342 else
1344 section = bfd_abs_section_ptr;
1345 value = sym.n_value;
1347 break;
1349 case XTY_SD:
1350 /* This is a csect definition. */
1351 if (csect != NULL)
1353 xcoff_section_data (abfd, csect)->last_symndx =
1354 ((esym - (bfd_byte *) obj_coff_external_syms (abfd)) / symesz);
1357 csect = NULL;
1358 csect_index = -(unsigned) 1;
1360 /* When we see a TOC anchor, we record the TOC value. */
1361 if (aux.x_csect.x_smclas == XMC_TC0)
1363 if (sym.n_sclass != C_HIDEXT
1364 || aux.x_csect.x_scnlen.l != 0)
1366 (*_bfd_error_handler)
1367 (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"),
1368 bfd_archive_filename (abfd), name, sym.n_sclass,
1369 aux.x_csect.x_scnlen.l);
1370 bfd_set_error (bfd_error_bad_value);
1371 goto error_return;
1373 xcoff_data (abfd)->toc = sym.n_value;
1376 /* We must merge TOC entries for the same symbol. We can
1377 merge two TOC entries if they are both C_HIDEXT, they
1378 both have the same name, they are both 4 or 8 bytes long, and
1379 they both have a relocation table entry for an external
1380 symbol with the same name. Unfortunately, this means
1381 that we must look through the relocations. Ick.
1383 Logic for 32 bit vs 64 bit.
1384 32 bit has a csect length of 4 for TOC
1385 64 bit has a csect length of 8 for TOC
1387 The conditions to get past the if-check are not that bad.
1388 They are what is used to create the TOC csects in the first
1389 place. */
1390 if (aux.x_csect.x_smclas == XMC_TC
1391 && sym.n_sclass == C_HIDEXT
1392 && info->hash->creator == abfd->xvec
1393 && ((bfd_xcoff_is_xcoff32 (abfd)
1394 && aux.x_csect.x_scnlen.l == 4)
1395 || (bfd_xcoff_is_xcoff64 (abfd)
1396 && aux.x_csect.x_scnlen.l == 8)))
1398 asection *enclosing;
1399 struct internal_reloc *relocs;
1400 bfd_size_type relindx;
1401 struct internal_reloc *rel;
1403 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1404 if (enclosing == NULL)
1405 goto error_return;
1407 relocs = reloc_info[enclosing->target_index].relocs;
1408 amt = enclosing->reloc_count;
1409 relindx = xcoff_find_reloc (relocs, amt, sym.n_value);
1410 rel = relocs + relindx;
1412 /* 32 bit R_POS r_size is 31
1413 64 bit R_POS r_size is 63 */
1414 if (relindx < enclosing->reloc_count
1415 && rel->r_vaddr == (bfd_vma) sym.n_value
1416 && rel->r_type == R_POS
1417 && ((bfd_xcoff_is_xcoff32 (abfd)
1418 && rel->r_size == 31)
1419 || (bfd_xcoff_is_xcoff64 (abfd)
1420 && rel->r_size == 63)))
1422 bfd_byte *erelsym;
1424 struct internal_syment relsym;
1426 erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
1427 + rel->r_symndx * symesz);
1428 bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
1429 if (relsym.n_sclass == C_EXT)
1431 const char *relname;
1432 char relbuf[SYMNMLEN + 1];
1433 bfd_boolean copy;
1434 struct xcoff_link_hash_entry *h;
1436 /* At this point we know that the TOC entry is
1437 for an externally visible symbol. */
1439 relname = _bfd_coff_internal_syment_name (abfd, &relsym,
1440 relbuf);
1441 if (relname == NULL)
1442 goto error_return;
1444 /* We only merge TOC entries if the TC name is
1445 the same as the symbol name. This handles
1446 the normal case, but not common cases like
1447 SYM.P4 which gcc generates to store SYM + 4
1448 in the TOC. FIXME. */
1450 if (strcmp (name, relname) == 0)
1452 copy = (! info->keep_memory
1453 || relsym._n._n_n._n_zeroes != 0
1454 || relsym._n._n_n._n_offset == 0);
1455 h = xcoff_link_hash_lookup (xcoff_hash_table (info),
1456 relname, TRUE, copy,
1457 FALSE);
1458 if (h == NULL)
1459 goto error_return;
1461 /* At this point h->root.type could be
1462 bfd_link_hash_new. That should be OK,
1463 since we know for sure that we will come
1464 across this symbol as we step through the
1465 file. */
1467 /* We store h in *sym_hash for the
1468 convenience of the relocate_section
1469 function. */
1470 *sym_hash = h;
1472 if (h->toc_section != NULL)
1474 asection **rel_csects;
1476 /* We already have a TOC entry for this
1477 symbol, so we can just ignore this
1478 one. */
1479 rel_csects =
1480 reloc_info[enclosing->target_index].csects;
1481 rel_csects[relindx] = bfd_und_section_ptr;
1482 break;
1485 /* We are about to create a TOC entry for
1486 this symbol. */
1487 set_toc = h;
1488 } /* merge toc reloc */
1489 } /* c_ext */
1490 } /* reloc */
1491 } /* merge toc */
1495 asection *enclosing;
1497 /* We need to create a new section. We get the name from
1498 the csect storage mapping class, so that the linker can
1499 accumulate similar csects together. */
1501 csect = bfd_xcoff_create_csect_from_smclas(abfd, &aux, name);
1502 if (NULL == csect)
1504 goto error_return;
1507 /* The enclosing section is the main section : .data, .text
1508 or .bss that the csect is coming from. */
1509 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1510 if (enclosing == NULL)
1511 goto error_return;
1513 if (! bfd_is_abs_section (enclosing)
1514 && ((bfd_vma) sym.n_value < enclosing->vma
1515 || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
1516 > enclosing->vma + enclosing->size)))
1518 (*_bfd_error_handler)
1519 (_("%s: csect `%s' not in enclosing section"),
1520 bfd_archive_filename (abfd), name);
1521 bfd_set_error (bfd_error_bad_value);
1522 goto error_return;
1524 csect->vma = sym.n_value;
1525 csect->filepos = (enclosing->filepos
1526 + sym.n_value
1527 - enclosing->vma);
1528 csect->size = aux.x_csect.x_scnlen.l;
1529 csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
1530 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1532 /* Record the enclosing section in the tdata for this new
1533 section. */
1534 amt = sizeof (struct coff_section_tdata);
1535 csect->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
1536 if (csect->used_by_bfd == NULL)
1537 goto error_return;
1538 amt = sizeof (struct xcoff_section_tdata);
1539 coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt);
1540 if (coff_section_data (abfd, csect)->tdata == NULL)
1541 goto error_return;
1542 xcoff_section_data (abfd, csect)->enclosing = enclosing;
1543 xcoff_section_data (abfd, csect)->lineno_count =
1544 enclosing->lineno_count;
1546 if (enclosing->owner == abfd)
1548 struct internal_reloc *relocs;
1549 bfd_size_type relindx;
1550 struct internal_reloc *rel;
1551 asection **rel_csect;
1553 relocs = reloc_info[enclosing->target_index].relocs;
1554 amt = enclosing->reloc_count;
1555 relindx = xcoff_find_reloc (relocs, amt, csect->vma);
1557 rel = relocs + relindx;
1558 rel_csect = (reloc_info[enclosing->target_index].csects
1559 + relindx);
1561 csect->rel_filepos = (enclosing->rel_filepos
1562 + relindx * bfd_coff_relsz (abfd));
1563 while (relindx < enclosing->reloc_count
1564 && *rel_csect == NULL
1565 && rel->r_vaddr < csect->vma + csect->size)
1568 *rel_csect = csect;
1569 csect->flags |= SEC_RELOC;
1570 ++csect->reloc_count;
1571 ++relindx;
1572 ++rel;
1573 ++rel_csect;
1577 /* There are a number of other fields and section flags
1578 which we do not bother to set. */
1580 csect_index = ((esym
1581 - (bfd_byte *) obj_coff_external_syms (abfd))
1582 / symesz);
1584 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1586 if (first_csect == NULL)
1587 first_csect = csect;
1589 /* If this symbol is C_EXT, we treat it as starting at the
1590 beginning of the newly created section. */
1591 if (sym.n_sclass == C_EXT)
1593 section = csect;
1594 value = 0;
1597 /* If this is a TOC section for a symbol, record it. */
1598 if (set_toc != NULL)
1599 set_toc->toc_section = csect;
1601 break;
1603 case XTY_LD:
1604 /* This is a label definition. The x_scnlen field is the
1605 symbol index of the csect. Usually the XTY_LD symbol will
1606 follow its appropriate XTY_SD symbol. The .set pseudo op can
1607 cause the XTY_LD to not follow the XTY_SD symbol. */
1609 bfd_boolean bad;
1611 bad = FALSE;
1612 if (aux.x_csect.x_scnlen.l < 0
1613 || (aux.x_csect.x_scnlen.l
1614 >= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
1615 bad = TRUE;
1616 if (! bad)
1618 section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
1619 if (section == NULL
1620 || (section->flags & SEC_HAS_CONTENTS) == 0)
1621 bad = TRUE;
1623 if (bad)
1625 (*_bfd_error_handler)
1626 (_("%s: misplaced XTY_LD `%s'"),
1627 bfd_archive_filename (abfd), name);
1628 bfd_set_error (bfd_error_bad_value);
1629 goto error_return;
1631 csect = section;
1632 value = sym.n_value - csect->vma;
1634 break;
1636 case XTY_CM:
1637 /* This is an unitialized csect. We could base the name on
1638 the storage mapping class, but we don't bother except for
1639 an XMC_TD symbol. If this csect is externally visible,
1640 it is a common symbol. We put XMC_TD symbols in sections
1641 named .tocbss, and rely on the linker script to put that
1642 in the TOC area. */
1644 if (csect != NULL)
1646 xcoff_section_data (abfd, csect)->last_symndx =
1647 ((esym
1648 - (bfd_byte *) obj_coff_external_syms (abfd))
1649 / symesz);
1652 if (aux.x_csect.x_smclas == XMC_TD)
1654 /* The linker script puts the .td section in the data
1655 section after the .tc section. */
1656 csect = bfd_make_section_anyway (abfd, ".td");
1659 else
1661 csect = bfd_make_section_anyway (abfd, ".bss");
1663 if (csect == NULL)
1664 goto error_return;
1665 csect->vma = sym.n_value;
1666 csect->size = aux.x_csect.x_scnlen.l;
1667 csect->flags |= SEC_ALLOC;
1668 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1669 /* There are a number of other fields and section flags
1670 which we do not bother to set. */
1672 csect_index = ((esym
1673 - (bfd_byte *) obj_coff_external_syms (abfd))
1674 / symesz);
1676 amt = sizeof (struct coff_section_tdata);
1677 csect->used_by_bfd = (PTR) bfd_zalloc (abfd, amt);
1678 if (csect->used_by_bfd == NULL)
1679 goto error_return;
1680 amt = sizeof (struct xcoff_section_tdata);
1681 coff_section_data (abfd, csect)->tdata = bfd_zalloc (abfd, amt);
1682 if (coff_section_data (abfd, csect)->tdata == NULL)
1683 goto error_return;
1684 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1686 if (first_csect == NULL)
1687 first_csect = csect;
1689 if (sym.n_sclass == C_EXT)
1691 csect->flags |= SEC_IS_COMMON;
1692 csect->size = 0;
1693 section = csect;
1694 value = aux.x_csect.x_scnlen.l;
1697 break;
1700 /* Check for magic symbol names. */
1701 if ((smtyp == XTY_SD || smtyp == XTY_CM)
1702 && aux.x_csect.x_smclas != XMC_TC
1703 && aux.x_csect.x_smclas != XMC_TD)
1706 int i = -1;
1708 if (name[0] == '_')
1710 if (strcmp (name, "_text") == 0)
1711 i = XCOFF_SPECIAL_SECTION_TEXT;
1712 else if (strcmp (name, "_etext") == 0)
1713 i = XCOFF_SPECIAL_SECTION_ETEXT;
1714 else if (strcmp (name, "_data") == 0)
1715 i = XCOFF_SPECIAL_SECTION_DATA;
1716 else if (strcmp (name, "_edata") == 0)
1717 i = XCOFF_SPECIAL_SECTION_EDATA;
1718 else if (strcmp (name, "_end") == 0)
1719 i = XCOFF_SPECIAL_SECTION_END;
1721 else if (name[0] == 'e' && strcmp (name, "end") == 0)
1723 i = XCOFF_SPECIAL_SECTION_END2;
1726 if (i != -1)
1728 xcoff_hash_table (info)->special_sections[i] = csect;
1732 /* Now we have enough information to add the symbol to the
1733 linker hash table. */
1735 if (sym.n_sclass == C_EXT)
1737 bfd_boolean copy;
1739 BFD_ASSERT (section != NULL);
1741 /* We must copy the name into memory if we got it from the
1742 syment itself, rather than the string table. */
1743 copy = default_copy;
1744 if (sym._n._n_n._n_zeroes != 0
1745 || sym._n._n_n._n_offset == 0)
1746 copy = TRUE;
1748 /* The AIX linker appears to only detect multiple symbol
1749 definitions when there is a reference to the symbol. If
1750 a symbol is defined multiple times, and the only
1751 references are from the same object file, the AIX linker
1752 appears to permit it. It does not merge the different
1753 definitions, but handles them independently. On the
1754 other hand, if there is a reference, the linker reports
1755 an error.
1757 This matters because the AIX <net/net_globals.h> header
1758 file actually defines an initialized array, so we have to
1759 actually permit that to work.
1761 Just to make matters even more confusing, the AIX linker
1762 appears to permit multiple symbol definitions whenever
1763 the second definition is in an archive rather than an
1764 object file. This may be a consequence of the manner in
1765 which it handles archives: I think it may load the entire
1766 archive in as separate csects, and then let garbage
1767 collection discard symbols.
1769 We also have to handle the case of statically linking a
1770 shared object, which will cause symbol redefinitions,
1771 although this is an easier case to detect. */
1773 if (info->hash->creator == abfd->xvec)
1775 if (! bfd_is_und_section (section))
1777 *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
1778 name, TRUE, copy, FALSE);
1780 else
1782 /* Make a copy of the symbol name to prevent problems with
1783 merging symbols. */
1784 *sym_hash = ((struct xcoff_link_hash_entry *)
1785 bfd_wrapped_link_hash_lookup (abfd, info, name,
1786 TRUE, TRUE,
1787 FALSE));
1789 if (*sym_hash == NULL)
1790 goto error_return;
1791 if (((*sym_hash)->root.type == bfd_link_hash_defined
1792 || (*sym_hash)->root.type == bfd_link_hash_defweak)
1793 && ! bfd_is_und_section (section)
1794 && ! bfd_is_com_section (section))
1796 /* This is a second definition of a defined symbol. */
1797 if ((abfd->flags & DYNAMIC) != 0
1798 && ((*sym_hash)->smclas != XMC_GL
1799 || aux.x_csect.x_smclas == XMC_GL
1800 || ((*sym_hash)->root.u.def.section->owner->flags
1801 & DYNAMIC) == 0))
1803 /* The new symbol is from a shared library, and
1804 either the existing symbol is not global
1805 linkage code or this symbol is global linkage
1806 code. If the existing symbol is global
1807 linkage code and the new symbol is not, then
1808 we want to use the new symbol. */
1809 section = bfd_und_section_ptr;
1810 value = 0;
1812 else if (((*sym_hash)->root.u.def.section->owner->flags
1813 & DYNAMIC) != 0)
1815 /* The existing symbol is from a shared library.
1816 Replace it. */
1817 (*sym_hash)->root.type = bfd_link_hash_undefined;
1818 (*sym_hash)->root.u.undef.abfd =
1819 (*sym_hash)->root.u.def.section->owner;
1821 else if (abfd->my_archive != NULL)
1823 /* This is a redefinition in an object contained
1824 in an archive. Just ignore it. See the
1825 comment above. */
1826 section = bfd_und_section_ptr;
1827 value = 0;
1829 else if ((*sym_hash)->root.und_next != NULL
1830 || info->hash->undefs_tail == &(*sym_hash)->root)
1832 /* This symbol has been referenced. In this
1833 case, we just continue and permit the
1834 multiple definition error. See the comment
1835 above about the behaviour of the AIX linker. */
1837 else if ((*sym_hash)->smclas == aux.x_csect.x_smclas)
1839 /* The symbols are both csects of the same
1840 class. There is at least a chance that this
1841 is a semi-legitimate redefinition. */
1842 section = bfd_und_section_ptr;
1843 value = 0;
1844 (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED;
1847 else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0
1848 && ((*sym_hash)->root.type == bfd_link_hash_defined
1849 || (*sym_hash)->root.type == bfd_link_hash_defweak)
1850 && (bfd_is_und_section (section)
1851 || bfd_is_com_section (section)))
1853 /* This is a reference to a multiply defined symbol.
1854 Report the error now. See the comment above
1855 about the behaviour of the AIX linker. We could
1856 also do this with warning symbols, but I'm not
1857 sure the XCOFF linker is wholly prepared to
1858 handle them, and that would only be a warning,
1859 not an error. */
1860 if (! ((*info->callbacks->multiple_definition)
1861 (info, (*sym_hash)->root.root.string,
1862 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0,
1863 (*sym_hash)->root.u.def.section->owner,
1864 (*sym_hash)->root.u.def.section,
1865 (*sym_hash)->root.u.def.value)))
1866 goto error_return;
1867 /* Try not to give this error too many times. */
1868 (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED;
1872 /* _bfd_generic_link_add_one_symbol may call the linker to
1873 generate an error message, and the linker may try to read
1874 the symbol table to give a good error. Right now, the
1875 line numbers are in an inconsistent state, since they are
1876 counted both in the real sections and in the new csects.
1877 We need to leave the count in the real sections so that
1878 the linker can report the line number of the error
1879 correctly, so temporarily clobber the link to the csects
1880 so that the linker will not try to read the line numbers
1881 a second time from the csects. */
1882 BFD_ASSERT (last_real->next == first_csect);
1883 last_real->next = NULL;
1884 if (! (_bfd_generic_link_add_one_symbol
1885 (info, abfd, name, flags, section, value,
1886 (const char *) NULL, copy, TRUE,
1887 (struct bfd_link_hash_entry **) sym_hash)))
1888 goto error_return;
1889 last_real->next = first_csect;
1891 if (smtyp == XTY_CM)
1893 if ((*sym_hash)->root.type != bfd_link_hash_common
1894 || (*sym_hash)->root.u.c.p->section != csect)
1896 /* We don't need the common csect we just created. */
1897 csect->size = 0;
1899 else
1901 (*sym_hash)->root.u.c.p->alignment_power
1902 = csect->alignment_power;
1906 if (info->hash->creator == abfd->xvec)
1908 int flag;
1910 if (smtyp == XTY_ER || smtyp == XTY_CM)
1911 flag = XCOFF_REF_REGULAR;
1912 else
1913 flag = XCOFF_DEF_REGULAR;
1914 (*sym_hash)->flags |= flag;
1916 if ((*sym_hash)->smclas == XMC_UA
1917 || flag == XCOFF_DEF_REGULAR)
1918 (*sym_hash)->smclas = aux.x_csect.x_smclas;
1922 *csect_cache = csect;
1924 esym += (sym.n_numaux + 1) * symesz;
1925 sym_hash += sym.n_numaux + 1;
1926 csect_cache += sym.n_numaux + 1;
1929 BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
1931 /* Make sure that we have seen all the relocs. */
1932 for (o = abfd->sections; o != first_csect; o = o->next)
1934 /* Reset the section size and the line number count, since the
1935 data is now attached to the csects. Don't reset the size of
1936 the .debug section, since we need to read it below in
1937 bfd_xcoff_size_dynamic_sections. */
1938 if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
1939 o->size = 0;
1940 o->lineno_count = 0;
1942 if ((o->flags & SEC_RELOC) != 0)
1944 bfd_size_type i;
1945 struct internal_reloc *rel;
1946 asection **rel_csect;
1948 rel = reloc_info[o->target_index].relocs;
1949 rel_csect = reloc_info[o->target_index].csects;
1951 for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
1954 if (*rel_csect == NULL)
1956 (*_bfd_error_handler)
1957 (_("%s: reloc %s:%d not in csect"),
1958 bfd_archive_filename (abfd), o->name, i);
1959 bfd_set_error (bfd_error_bad_value);
1960 goto error_return;
1963 /* We identify all symbols which are called, so that we
1964 can create glue code for calls to functions imported
1965 from dynamic objects. */
1966 if (info->hash->creator == abfd->xvec
1967 && *rel_csect != bfd_und_section_ptr
1968 && (rel->r_type == R_BR
1969 || rel->r_type == R_RBR)
1970 && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
1972 struct xcoff_link_hash_entry *h;
1974 h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
1975 h->flags |= XCOFF_CALLED;
1976 /* If the symbol name starts with a period, it is
1977 the code of a function. If the symbol is
1978 currently undefined, then add an undefined symbol
1979 for the function descriptor. This should do no
1980 harm, because any regular object that defines the
1981 function should also define the function
1982 descriptor. It helps, because it means that we
1983 will identify the function descriptor with a
1984 dynamic object if a dynamic object defines it. */
1985 if (h->root.root.string[0] == '.'
1986 && h->descriptor == NULL)
1988 struct xcoff_link_hash_entry *hds;
1989 struct bfd_link_hash_entry *bh;
1991 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
1992 h->root.root.string + 1,
1993 TRUE, FALSE, TRUE);
1994 if (hds == NULL)
1995 goto error_return;
1996 if (hds->root.type == bfd_link_hash_new)
1998 bh = &hds->root;
1999 if (! (_bfd_generic_link_add_one_symbol
2000 (info, abfd, hds->root.root.string,
2001 (flagword) 0, bfd_und_section_ptr,
2002 (bfd_vma) 0, (const char *) NULL, FALSE,
2003 TRUE, &bh)))
2004 goto error_return;
2005 hds = (struct xcoff_link_hash_entry *) bh;
2007 hds->flags |= XCOFF_DESCRIPTOR;
2008 BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
2009 && (h->flags & XCOFF_DESCRIPTOR) == 0);
2010 hds->descriptor = h;
2011 h->descriptor = hds;
2016 free (reloc_info[o->target_index].csects);
2017 reloc_info[o->target_index].csects = NULL;
2019 /* Reset SEC_RELOC and the reloc_count, since the reloc
2020 information is now attached to the csects. */
2021 o->flags &=~ SEC_RELOC;
2022 o->reloc_count = 0;
2024 /* If we are not keeping memory, free the reloc information. */
2025 if (! info->keep_memory
2026 && coff_section_data (abfd, o) != NULL
2027 && coff_section_data (abfd, o)->relocs != NULL
2028 && ! coff_section_data (abfd, o)->keep_relocs)
2030 free (coff_section_data (abfd, o)->relocs);
2031 coff_section_data (abfd, o)->relocs = NULL;
2035 /* Free up the line numbers. FIXME: We could cache these
2036 somewhere for the final link, to avoid reading them again. */
2037 if (reloc_info[o->target_index].linenos != NULL)
2039 free (reloc_info[o->target_index].linenos);
2040 reloc_info[o->target_index].linenos = NULL;
2044 free (reloc_info);
2046 obj_coff_keep_syms (abfd) = keep_syms;
2048 return TRUE;
2050 error_return:
2051 if (reloc_info != NULL)
2053 for (o = abfd->sections; o != NULL; o = o->next)
2055 if (reloc_info[o->target_index].csects != NULL)
2056 free (reloc_info[o->target_index].csects);
2057 if (reloc_info[o->target_index].linenos != NULL)
2058 free (reloc_info[o->target_index].linenos);
2060 free (reloc_info);
2062 obj_coff_keep_syms (abfd) = keep_syms;
2063 return FALSE;
2066 #undef N_TMASK
2067 #undef N_BTSHFT
2069 /* This function is used to add symbols from a dynamic object to the
2070 global symbol table. */
2072 static bfd_boolean
2073 xcoff_link_add_dynamic_symbols (abfd, info)
2074 bfd *abfd;
2075 struct bfd_link_info *info;
2077 asection *lsec;
2078 bfd_byte *contents;
2079 struct internal_ldhdr ldhdr;
2080 const char *strings;
2081 bfd_byte *elsym, *elsymend;
2082 struct xcoff_import_file *n;
2083 const char *bname;
2084 const char *mname;
2085 const char *s;
2086 unsigned int c;
2087 struct xcoff_import_file **pp;
2089 /* We can only handle a dynamic object if we are generating an XCOFF
2090 output file. */
2091 if (info->hash->creator != abfd->xvec)
2093 (*_bfd_error_handler)
2094 (_("%s: XCOFF shared object when not producing XCOFF output"),
2095 bfd_get_filename (abfd));
2096 bfd_set_error (bfd_error_invalid_operation);
2097 return FALSE;
2100 /* The symbols we use from a dynamic object are not the symbols in
2101 the normal symbol table, but, rather, the symbols in the export
2102 table. If there is a global symbol in a dynamic object which is
2103 not in the export table, the loader will not be able to find it,
2104 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
2105 libc.a has symbols in the export table which are not in the
2106 symbol table. */
2108 /* Read in the .loader section. FIXME: We should really use the
2109 o_snloader field in the a.out header, rather than grabbing the
2110 section by name. */
2111 lsec = bfd_get_section_by_name (abfd, ".loader");
2112 if (lsec == NULL)
2114 (*_bfd_error_handler)
2115 (_("%s: dynamic object with no .loader section"),
2116 bfd_get_filename (abfd));
2117 bfd_set_error (bfd_error_no_symbols);
2118 return FALSE;
2122 if (! xcoff_get_section_contents (abfd, lsec))
2123 return FALSE;
2124 contents = coff_section_data (abfd, lsec)->contents;
2126 /* Remove the sections from this object, so that they do not get
2127 included in the link. */
2128 bfd_section_list_clear (abfd);
2130 bfd_xcoff_swap_ldhdr_in (abfd, contents, &ldhdr);
2132 strings = (char *) contents + ldhdr.l_stoff;
2134 elsym = contents + bfd_xcoff_loader_symbol_offset(abfd, &ldhdr);
2136 elsymend = elsym + ldhdr.l_nsyms * bfd_xcoff_ldsymsz(abfd);
2138 for (; elsym < elsymend; elsym += bfd_xcoff_ldsymsz(abfd))
2140 struct internal_ldsym ldsym;
2141 char nambuf[SYMNMLEN + 1];
2142 const char *name;
2143 struct xcoff_link_hash_entry *h;
2145 bfd_xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
2147 /* We are only interested in exported symbols. */
2148 if ((ldsym.l_smtype & L_EXPORT) == 0)
2149 continue;
2151 if (ldsym._l._l_l._l_zeroes == 0)
2152 name = strings + ldsym._l._l_l._l_offset;
2153 else
2155 memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
2156 nambuf[SYMNMLEN] = '\0';
2157 name = nambuf;
2160 /* Normally we could not call xcoff_link_hash_lookup in an add
2161 symbols routine, since we might not be using an XCOFF hash
2162 table. However, we verified above that we are using an XCOFF
2163 hash table. */
2165 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, TRUE,
2166 TRUE, TRUE);
2167 if (h == NULL)
2168 return FALSE;
2170 h->flags |= XCOFF_DEF_DYNAMIC;
2172 /* If the symbol is undefined, and the BFD it was found in is
2173 not a dynamic object, change the BFD to this dynamic object,
2174 so that we can get the correct import file ID. */
2175 if ((h->root.type == bfd_link_hash_undefined
2176 || h->root.type == bfd_link_hash_undefweak)
2177 && (h->root.u.undef.abfd == NULL
2178 || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
2179 h->root.u.undef.abfd = abfd;
2181 if (h->root.type == bfd_link_hash_new)
2183 h->root.type = bfd_link_hash_undefined;
2184 h->root.u.undef.abfd = abfd;
2185 /* We do not want to add this to the undefined symbol list. */
2188 if (h->smclas == XMC_UA
2189 || h->root.type == bfd_link_hash_undefined
2190 || h->root.type == bfd_link_hash_undefweak)
2191 h->smclas = ldsym.l_smclas;
2193 /* Unless this is an XMC_XO symbol, we don't bother to actually
2194 define it, since we don't have a section to put it in anyhow.
2195 Instead, the relocation routines handle the DEF_DYNAMIC flag
2196 correctly. */
2198 if (h->smclas == XMC_XO
2199 && (h->root.type == bfd_link_hash_undefined
2200 || h->root.type == bfd_link_hash_undefweak))
2202 /* This symbol has an absolute value. */
2203 h->root.type = bfd_link_hash_defined;
2204 h->root.u.def.section = bfd_abs_section_ptr;
2205 h->root.u.def.value = ldsym.l_value;
2208 /* If this symbol defines a function descriptor, then it
2209 implicitly defines the function code as well. */
2210 if (h->smclas == XMC_DS
2211 || (h->smclas == XMC_XO && name[0] != '.'))
2212 h->flags |= XCOFF_DESCRIPTOR;
2213 if ((h->flags & XCOFF_DESCRIPTOR) != 0)
2215 struct xcoff_link_hash_entry *hds;
2217 hds = h->descriptor;
2218 if (hds == NULL)
2220 char *dsnm;
2222 dsnm = bfd_malloc ((bfd_size_type) strlen (name) + 2);
2223 if (dsnm == NULL)
2224 return FALSE;
2225 dsnm[0] = '.';
2226 strcpy (dsnm + 1, name);
2227 hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm,
2228 TRUE, TRUE, TRUE);
2229 free (dsnm);
2230 if (hds == NULL)
2231 return FALSE;
2233 if (hds->root.type == bfd_link_hash_new)
2235 hds->root.type = bfd_link_hash_undefined;
2236 hds->root.u.undef.abfd = abfd;
2237 /* We do not want to add this to the undefined
2238 symbol list. */
2241 hds->descriptor = h;
2242 h->descriptor = hds;
2245 hds->flags |= XCOFF_DEF_DYNAMIC;
2246 if (hds->smclas == XMC_UA)
2247 hds->smclas = XMC_PR;
2249 /* An absolute symbol appears to actually define code, not a
2250 function descriptor. This is how some math functions are
2251 implemented on AIX 4.1. */
2252 if (h->smclas == XMC_XO
2253 && (hds->root.type == bfd_link_hash_undefined
2254 || hds->root.type == bfd_link_hash_undefweak))
2256 hds->smclas = XMC_XO;
2257 hds->root.type = bfd_link_hash_defined;
2258 hds->root.u.def.section = bfd_abs_section_ptr;
2259 hds->root.u.def.value = ldsym.l_value;
2264 if (contents != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
2266 free (coff_section_data (abfd, lsec)->contents);
2267 coff_section_data (abfd, lsec)->contents = NULL;
2270 /* Record this file in the import files. */
2272 n = ((struct xcoff_import_file *)
2273 bfd_alloc (abfd, (bfd_size_type) sizeof (struct xcoff_import_file)));
2274 if (n == NULL)
2275 return FALSE;
2276 n->next = NULL;
2278 /* For some reason, the path entry in the import file list for a
2279 shared object appears to always be empty. The file name is the
2280 base name. */
2281 n->path = "";
2282 if (abfd->my_archive == NULL)
2284 bname = bfd_get_filename (abfd);
2285 mname = "";
2287 else
2289 bname = bfd_get_filename (abfd->my_archive);
2290 mname = bfd_get_filename (abfd);
2292 s = strrchr (bname, '/');
2293 if (s != NULL)
2294 bname = s + 1;
2295 n->file = bname;
2296 n->member = mname;
2298 /* We start c at 1 because the first import file number is reserved
2299 for LIBPATH. */
2300 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2301 *pp != NULL;
2302 pp = &(*pp)->next, ++c)
2304 *pp = n;
2306 xcoff_data (abfd)->import_file_id = c;
2308 return TRUE;
2311 /* Routines that are called after all the input files have been
2312 handled, but before the sections are laid out in memory. */
2314 /* Mark a symbol as not being garbage, including the section in which
2315 it is defined. */
2317 static INLINE bfd_boolean
2318 xcoff_mark_symbol (info, h)
2319 struct bfd_link_info *info;
2320 struct xcoff_link_hash_entry *h;
2323 if ((h->flags & XCOFF_MARK) != 0)
2324 return TRUE;
2326 h->flags |= XCOFF_MARK;
2327 if (h->root.type == bfd_link_hash_defined
2328 || h->root.type == bfd_link_hash_defweak)
2330 asection *hsec;
2332 hsec = h->root.u.def.section;
2333 if (! bfd_is_abs_section (hsec)
2334 && (hsec->flags & SEC_MARK) == 0)
2336 if (! xcoff_mark (info, hsec))
2337 return FALSE;
2341 if (h->toc_section != NULL
2342 && (h->toc_section->flags & SEC_MARK) == 0)
2344 if (! xcoff_mark (info, h->toc_section))
2345 return FALSE;
2348 return TRUE;
2351 /* The mark phase of garbage collection. For a given section, mark
2352 it, and all the sections which define symbols to which it refers.
2353 Because this function needs to look at the relocs, we also count
2354 the number of relocs which need to be copied into the .loader
2355 section. */
2357 static bfd_boolean
2358 xcoff_mark (info, sec)
2359 struct bfd_link_info *info;
2360 asection *sec;
2362 if (bfd_is_abs_section (sec)
2363 || (sec->flags & SEC_MARK) != 0)
2364 return TRUE;
2366 sec->flags |= SEC_MARK;
2368 if (sec->owner->xvec == info->hash->creator
2369 && coff_section_data (sec->owner, sec) != NULL
2370 && xcoff_section_data (sec->owner, sec) != NULL)
2372 register struct xcoff_link_hash_entry **hp, **hpend;
2373 struct internal_reloc *rel, *relend;
2375 /* Mark all the symbols in this section. */
2377 hp = (obj_xcoff_sym_hashes (sec->owner)
2378 + xcoff_section_data (sec->owner, sec)->first_symndx);
2379 hpend = (obj_xcoff_sym_hashes (sec->owner)
2380 + xcoff_section_data (sec->owner, sec)->last_symndx);
2381 for (; hp < hpend; hp++)
2383 register struct xcoff_link_hash_entry *h;
2385 h = *hp;
2386 if (h != NULL
2387 && (h->flags & XCOFF_MARK) == 0)
2389 if (! xcoff_mark_symbol (info, h))
2390 return FALSE;
2394 /* Look through the section relocs. */
2396 if ((sec->flags & SEC_RELOC) != 0
2397 && sec->reloc_count > 0)
2399 rel = xcoff_read_internal_relocs (sec->owner, sec, TRUE,
2400 (bfd_byte *) NULL, FALSE,
2401 (struct internal_reloc *) NULL);
2402 if (rel == NULL)
2403 return FALSE;
2404 relend = rel + sec->reloc_count;
2405 for (; rel < relend; rel++)
2407 asection *rsec;
2408 struct xcoff_link_hash_entry *h;
2410 if ((unsigned int) rel->r_symndx
2411 > obj_raw_syment_count (sec->owner))
2412 continue;
2414 h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
2415 if (h != NULL
2416 && (h->flags & XCOFF_MARK) == 0)
2418 if (! xcoff_mark_symbol (info, h))
2419 return FALSE;
2422 rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
2423 if (rsec != NULL
2424 && (rsec->flags & SEC_MARK) == 0)
2426 if (! xcoff_mark (info, rsec))
2427 return FALSE;
2430 /* See if this reloc needs to be copied into the .loader
2431 section. */
2432 switch (rel->r_type)
2434 default:
2435 if (h == NULL
2436 || h->root.type == bfd_link_hash_defined
2437 || h->root.type == bfd_link_hash_defweak
2438 || h->root.type == bfd_link_hash_common
2439 || ((h->flags & XCOFF_CALLED) != 0
2440 && (h->root.type == bfd_link_hash_undefined
2441 || h->root.type == bfd_link_hash_undefweak)
2442 && h->root.root.string[0] == '.'
2443 && h->descriptor != NULL
2444 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
2445 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
2446 && (h->descriptor->flags
2447 & XCOFF_DEF_REGULAR) == 0))))
2448 break;
2449 /* Fall through. */
2450 case R_POS:
2451 case R_NEG:
2452 case R_RL:
2453 case R_RLA:
2454 ++xcoff_hash_table (info)->ldrel_count;
2455 if (h != NULL)
2456 h->flags |= XCOFF_LDREL;
2457 break;
2458 case R_TOC:
2459 case R_GL:
2460 case R_TCL:
2461 case R_TRL:
2462 case R_TRLA:
2463 /* We should never need a .loader reloc for a TOC
2464 relative reloc. */
2465 break;
2469 if (! info->keep_memory
2470 && coff_section_data (sec->owner, sec) != NULL
2471 && coff_section_data (sec->owner, sec)->relocs != NULL
2472 && ! coff_section_data (sec->owner, sec)->keep_relocs)
2474 free (coff_section_data (sec->owner, sec)->relocs);
2475 coff_section_data (sec->owner, sec)->relocs = NULL;
2480 return TRUE;
2483 /* The sweep phase of garbage collection. Remove all garbage
2484 sections. */
2486 static void
2487 xcoff_sweep (info)
2488 struct bfd_link_info *info;
2490 bfd *sub;
2492 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2494 asection *o;
2496 for (o = sub->sections; o != NULL; o = o->next)
2498 if ((o->flags & SEC_MARK) == 0)
2500 /* Keep all sections from non-XCOFF input files. Keep
2501 special sections. Keep .debug sections for the
2502 moment. */
2503 if (sub->xvec != info->hash->creator
2504 || o == xcoff_hash_table (info)->debug_section
2505 || o == xcoff_hash_table (info)->loader_section
2506 || o == xcoff_hash_table (info)->linkage_section
2507 || o == xcoff_hash_table (info)->toc_section
2508 || o == xcoff_hash_table (info)->descriptor_section
2509 || strcmp (o->name, ".debug") == 0)
2510 o->flags |= SEC_MARK;
2511 else
2513 o->size = 0;
2514 o->reloc_count = 0;
2515 o->lineno_count = 0;
2522 /* Record the number of elements in a set. This is used to output the
2523 correct csect length. */
2525 bfd_boolean
2526 bfd_xcoff_link_record_set (output_bfd, info, harg, size)
2527 bfd *output_bfd;
2528 struct bfd_link_info *info;
2529 struct bfd_link_hash_entry *harg;
2530 bfd_size_type size;
2532 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2533 struct xcoff_link_size_list *n;
2534 bfd_size_type amt;
2536 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2537 return TRUE;
2539 /* This will hardly ever be called. I don't want to burn four bytes
2540 per global symbol, so instead the size is kept on a linked list
2541 attached to the hash table. */
2543 amt = sizeof (struct xcoff_link_size_list);
2544 n = (struct xcoff_link_size_list *) bfd_alloc (output_bfd, amt);
2545 if (n == NULL)
2546 return FALSE;
2547 n->next = xcoff_hash_table (info)->size_list;
2548 n->h = h;
2549 n->size = size;
2550 xcoff_hash_table (info)->size_list = n;
2552 h->flags |= XCOFF_HAS_SIZE;
2554 return TRUE;
2557 /* Import a symbol. */
2559 bfd_boolean
2560 bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
2561 impmember, syscall_flag)
2562 bfd *output_bfd;
2563 struct bfd_link_info *info;
2564 struct bfd_link_hash_entry *harg;
2565 bfd_vma val;
2566 const char *imppath;
2567 const char *impfile;
2568 const char *impmember;
2569 unsigned int syscall_flag;
2571 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2573 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2574 return TRUE;
2576 /* A symbol name which starts with a period is the code for a
2577 function. If the symbol is undefined, then add an undefined
2578 symbol for the function descriptor, and import that instead. */
2579 if (h->root.root.string[0] == '.'
2580 && h->root.type == bfd_link_hash_undefined
2581 && val == (bfd_vma) -1)
2583 struct xcoff_link_hash_entry *hds;
2585 hds = h->descriptor;
2586 if (hds == NULL)
2588 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
2589 h->root.root.string + 1,
2590 TRUE, FALSE, TRUE);
2591 if (hds == NULL)
2592 return FALSE;
2593 if (hds->root.type == bfd_link_hash_new)
2595 hds->root.type = bfd_link_hash_undefined;
2596 hds->root.u.undef.abfd = h->root.u.undef.abfd;
2598 hds->flags |= XCOFF_DESCRIPTOR;
2599 BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
2600 && (h->flags & XCOFF_DESCRIPTOR) == 0);
2601 hds->descriptor = h;
2602 h->descriptor = hds;
2605 /* Now, if the descriptor is undefined, import the descriptor
2606 rather than the symbol we were told to import. FIXME: Is
2607 this correct in all cases? */
2608 if (hds->root.type == bfd_link_hash_undefined)
2609 h = hds;
2612 h->flags |= (XCOFF_IMPORT | syscall_flag);
2614 if (val != (bfd_vma) -1)
2616 if (h->root.type == bfd_link_hash_defined
2617 && (! bfd_is_abs_section (h->root.u.def.section)
2618 || h->root.u.def.value != val))
2620 if (! ((*info->callbacks->multiple_definition)
2621 (info, h->root.root.string, h->root.u.def.section->owner,
2622 h->root.u.def.section, h->root.u.def.value,
2623 output_bfd, bfd_abs_section_ptr, val)))
2624 return FALSE;
2627 h->root.type = bfd_link_hash_defined;
2628 h->root.u.def.section = bfd_abs_section_ptr;
2629 h->root.u.def.value = val;
2632 /* We overload the ldindx field to hold the l_ifile value for this
2633 symbol. */
2634 BFD_ASSERT (h->ldsym == NULL);
2635 BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0);
2636 if (imppath == NULL)
2637 h->ldindx = -1;
2638 else
2640 unsigned int c;
2641 struct xcoff_import_file **pp;
2643 /* We start c at 1 because the first entry in the import list is
2644 reserved for the library search path. */
2645 for (pp = &xcoff_hash_table (info)->imports, c = 1;
2646 *pp != NULL;
2647 pp = &(*pp)->next, ++c)
2649 if (strcmp ((*pp)->path, imppath) == 0
2650 && strcmp ((*pp)->file, impfile) == 0
2651 && strcmp ((*pp)->member, impmember) == 0)
2652 break;
2655 if (*pp == NULL)
2657 struct xcoff_import_file *n;
2658 bfd_size_type amt = sizeof (struct xcoff_import_file);
2660 n = (struct xcoff_import_file *) bfd_alloc (output_bfd, amt);
2661 if (n == NULL)
2662 return FALSE;
2663 n->next = NULL;
2664 n->path = imppath;
2665 n->file = impfile;
2666 n->member = impmember;
2667 *pp = n;
2670 h->ldindx = c;
2673 return TRUE;
2676 /* Export a symbol. */
2678 bfd_boolean
2679 bfd_xcoff_export_symbol (output_bfd, info, harg)
2680 bfd *output_bfd;
2681 struct bfd_link_info *info;
2682 struct bfd_link_hash_entry *harg;
2684 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2686 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2687 return TRUE;
2689 h->flags |= XCOFF_EXPORT;
2691 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
2692 I'm just going to ignore it until somebody explains it. */
2694 /* See if this is a function descriptor. It may be one even though
2695 it is not so marked. */
2696 if ((h->flags & XCOFF_DESCRIPTOR) == 0
2697 && h->root.root.string[0] != '.')
2699 char *fnname;
2700 struct xcoff_link_hash_entry *hfn;
2701 bfd_size_type amt = strlen (h->root.root.string) + 2;
2703 fnname = (char *) bfd_malloc (amt);
2704 if (fnname == NULL)
2705 return FALSE;
2706 fnname[0] = '.';
2707 strcpy (fnname + 1, h->root.root.string);
2708 hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
2709 fnname, FALSE, FALSE, TRUE);
2710 free (fnname);
2711 if (hfn != NULL
2712 && hfn->smclas == XMC_PR
2713 && (hfn->root.type == bfd_link_hash_defined
2714 || hfn->root.type == bfd_link_hash_defweak))
2716 h->flags |= XCOFF_DESCRIPTOR;
2717 h->descriptor = hfn;
2718 hfn->descriptor = h;
2722 /* Make sure we don't garbage collect this symbol. */
2723 if (! xcoff_mark_symbol (info, h))
2724 return FALSE;
2726 /* If this is a function descriptor, make sure we don't garbage
2727 collect the associated function code. We normally don't have to
2728 worry about this, because the descriptor will be attached to a
2729 section with relocs, but if we are creating the descriptor
2730 ourselves those relocs will not be visible to the mark code. */
2731 if ((h->flags & XCOFF_DESCRIPTOR) != 0)
2733 if (! xcoff_mark_symbol (info, h->descriptor))
2734 return FALSE;
2737 return TRUE;
2740 /* Count a reloc against a symbol. This is called for relocs
2741 generated by the linker script, typically for global constructors
2742 and destructors. */
2744 bfd_boolean
2745 bfd_xcoff_link_count_reloc (output_bfd, info, name)
2746 bfd *output_bfd;
2747 struct bfd_link_info *info;
2748 const char *name;
2750 struct xcoff_link_hash_entry *h;
2752 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2753 return TRUE;
2755 h = ((struct xcoff_link_hash_entry *)
2756 bfd_wrapped_link_hash_lookup (output_bfd, info, name, FALSE, FALSE,
2757 FALSE));
2758 if (h == NULL)
2760 (*_bfd_error_handler) (_("%s: no such symbol"), name);
2761 bfd_set_error (bfd_error_no_symbols);
2762 return FALSE;
2765 h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
2766 ++xcoff_hash_table (info)->ldrel_count;
2768 /* Mark the symbol to avoid garbage collection. */
2769 if (! xcoff_mark_symbol (info, h))
2770 return FALSE;
2772 return TRUE;
2775 /* This function is called for each symbol to which the linker script
2776 assigns a value. */
2778 bfd_boolean
2779 bfd_xcoff_record_link_assignment (output_bfd, info, name)
2780 bfd *output_bfd;
2781 struct bfd_link_info *info;
2782 const char *name;
2784 struct xcoff_link_hash_entry *h;
2786 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2787 return TRUE;
2789 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, TRUE, TRUE,
2790 FALSE);
2791 if (h == NULL)
2792 return FALSE;
2794 h->flags |= XCOFF_DEF_REGULAR;
2796 return TRUE;
2799 /* Build the .loader section. This is called by the XCOFF linker
2800 emulation before_allocation routine. We must set the size of the
2801 .loader section before the linker lays out the output file.
2802 LIBPATH is the library path to search for shared objects; this is
2803 normally built from the -L arguments passed to the linker. ENTRY
2804 is the name of the entry point symbol (the -e linker option).
2805 FILE_ALIGN is the alignment to use for sections within the file
2806 (the -H linker option). MAXSTACK is the maximum stack size (the
2807 -bmaxstack linker option). MAXDATA is the maximum data size (the
2808 -bmaxdata linker option). GC is whether to do garbage collection
2809 (the -bgc linker option). MODTYPE is the module type (the
2810 -bmodtype linker option). TEXTRO is whether the text section must
2811 be read only (the -btextro linker option). EXPORT_DEFINEDS is
2812 whether all defined symbols should be exported (the -unix linker
2813 option). SPECIAL_SECTIONS is set by this routine to csects with
2814 magic names like _end. */
2816 bfd_boolean
2817 bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
2818 file_align, maxstack, maxdata, gc,
2819 modtype, textro, export_defineds,
2820 special_sections, rtld)
2821 bfd *output_bfd;
2822 struct bfd_link_info *info;
2823 const char *libpath;
2824 const char *entry;
2825 unsigned long file_align;
2826 unsigned long maxstack;
2827 unsigned long maxdata;
2828 bfd_boolean gc;
2829 int modtype;
2830 bfd_boolean textro;
2831 bfd_boolean export_defineds;
2832 asection **special_sections;
2833 bfd_boolean rtld;
2835 struct xcoff_link_hash_entry *hentry;
2836 asection *lsec;
2837 struct xcoff_loader_info ldinfo;
2838 int i;
2839 size_t impsize, impcount;
2840 struct xcoff_import_file *fl;
2841 struct internal_ldhdr *ldhdr;
2842 bfd_size_type stoff;
2843 register char *out;
2844 asection *sec;
2845 bfd *sub;
2846 struct bfd_strtab_hash *debug_strtab;
2847 bfd_byte *debug_contents = NULL;
2848 bfd_size_type amt;
2850 if (bfd_get_flavour (output_bfd) != bfd_target_xcoff_flavour)
2852 for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
2853 special_sections[i] = NULL;
2854 return TRUE;
2857 ldinfo.failed = FALSE;
2858 ldinfo.output_bfd = output_bfd;
2859 ldinfo.info = info;
2860 ldinfo.export_defineds = export_defineds;
2861 ldinfo.ldsym_count = 0;
2862 ldinfo.string_size = 0;
2863 ldinfo.strings = NULL;
2864 ldinfo.string_alc = 0;
2866 xcoff_data (output_bfd)->maxstack = maxstack;
2867 xcoff_data (output_bfd)->maxdata = maxdata;
2868 xcoff_data (output_bfd)->modtype = modtype;
2870 xcoff_hash_table (info)->file_align = file_align;
2871 xcoff_hash_table (info)->textro = textro;
2873 hentry = NULL;
2874 if (entry != NULL)
2876 hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
2877 FALSE, FALSE, TRUE);
2878 if (hentry != NULL)
2879 hentry->flags |= XCOFF_ENTRY;
2882 /* __rtinit */
2883 if (info->init_function || info->fini_function || rtld)
2885 struct xcoff_link_hash_entry *hsym;
2886 struct internal_ldsym *ldsym;
2888 hsym = xcoff_link_hash_lookup (xcoff_hash_table (info),
2889 "__rtinit", FALSE, FALSE, TRUE);
2890 if (hsym == NULL)
2892 (*_bfd_error_handler)
2893 (_("error: undefined symbol __rtinit"));
2894 return FALSE;
2897 xcoff_mark_symbol (info, hsym);
2898 hsym->flags |= (XCOFF_DEF_REGULAR | XCOFF_RTINIT);
2900 /* __rtinit initialized */
2901 amt = sizeof (struct internal_ldsym);
2902 ldsym = (struct internal_ldsym *) bfd_malloc (amt);
2904 ldsym->l_value = 0; /* will be filled in later */
2905 ldsym->l_scnum = 2; /* data section */
2906 ldsym->l_smtype = XTY_SD; /* csect section definition */
2907 ldsym->l_smclas = 5; /* .rw */
2908 ldsym->l_ifile = 0; /* special system loader symbol */
2909 ldsym->l_parm = 0; /* NA */
2911 /* Force __rtinit to be the first symbol in the loader symbol table
2912 See xcoff_build_ldsyms
2914 The first 3 symbol table indices are reserved to indicate the data,
2915 text and bss sections. */
2916 BFD_ASSERT (0 == ldinfo.ldsym_count);
2918 hsym->ldindx = 3;
2919 ldinfo.ldsym_count = 1;
2920 hsym->ldsym = ldsym;
2922 if (! bfd_xcoff_put_ldsymbol_name (ldinfo.output_bfd, &ldinfo,
2923 hsym->ldsym, hsym->root.root.string))
2924 return FALSE;
2926 /* This symbol is written out by xcoff_write_global_symbol
2927 Set stuff up so xcoff_write_global_symbol logic works. */
2928 hsym->flags |= XCOFF_DEF_REGULAR | XCOFF_MARK;
2929 hsym->root.type = bfd_link_hash_defined;
2930 hsym->root.u.def.value = 0;
2933 /* Garbage collect unused sections. */
2934 if (info->relocatable
2935 || ! gc
2936 || hentry == NULL
2937 || (hentry->root.type != bfd_link_hash_defined
2938 && hentry->root.type != bfd_link_hash_defweak))
2940 gc = FALSE;
2941 xcoff_hash_table (info)->gc = FALSE;
2943 /* We still need to call xcoff_mark, in order to set ldrel_count
2944 correctly. */
2945 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2947 asection *o;
2949 for (o = sub->sections; o != NULL; o = o->next)
2951 if ((o->flags & SEC_MARK) == 0)
2953 if (! xcoff_mark (info, o))
2954 goto error_return;
2959 else
2961 if (! xcoff_mark (info, hentry->root.u.def.section))
2962 goto error_return;
2963 xcoff_sweep (info);
2964 xcoff_hash_table (info)->gc = TRUE;
2967 /* Return special sections to the caller. */
2968 for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
2970 sec = xcoff_hash_table (info)->special_sections[i];
2972 if (sec != NULL
2973 && gc
2974 && (sec->flags & SEC_MARK) == 0)
2976 sec = NULL;
2978 special_sections[i] = sec;
2981 if (info->input_bfds == NULL)
2983 /* I'm not sure what to do in this bizarre case. */
2984 return TRUE;
2987 xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
2988 (PTR) &ldinfo);
2989 if (ldinfo.failed)
2990 goto error_return;
2992 /* Work out the size of the import file names. Each import file ID
2993 consists of three null terminated strings: the path, the file
2994 name, and the archive member name. The first entry in the list
2995 of names is the path to use to find objects, which the linker has
2996 passed in as the libpath argument. For some reason, the path
2997 entry in the other import file names appears to always be empty. */
2998 impsize = strlen (libpath) + 3;
2999 impcount = 1;
3000 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3002 ++impcount;
3003 impsize += (strlen (fl->path)
3004 + strlen (fl->file)
3005 + strlen (fl->member)
3006 + 3);
3009 /* Set up the .loader section header. */
3010 ldhdr = &xcoff_hash_table (info)->ldhdr;
3011 ldhdr->l_version = bfd_xcoff_ldhdr_version(output_bfd);
3012 ldhdr->l_nsyms = ldinfo.ldsym_count;
3013 ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
3014 ldhdr->l_istlen = impsize;
3015 ldhdr->l_nimpid = impcount;
3016 ldhdr->l_impoff = (bfd_xcoff_ldhdrsz(output_bfd)
3017 + ldhdr->l_nsyms * bfd_xcoff_ldsymsz(output_bfd)
3018 + ldhdr->l_nreloc * bfd_xcoff_ldrelsz(output_bfd));
3019 ldhdr->l_stlen = ldinfo.string_size;
3020 stoff = ldhdr->l_impoff + impsize;
3021 if (ldinfo.string_size == 0)
3022 ldhdr->l_stoff = 0;
3023 else
3024 ldhdr->l_stoff = stoff;
3026 /* 64 bit elements to ldhdr
3027 The swap out routine for 32 bit will ignore them.
3028 Nothing fancy, symbols come after the header and relocs come
3029 after symbols. */
3030 ldhdr->l_symoff = bfd_xcoff_ldhdrsz (output_bfd);
3031 ldhdr->l_rldoff = (bfd_xcoff_ldhdrsz (output_bfd)
3032 + ldhdr->l_nsyms * bfd_xcoff_ldsymsz (output_bfd));
3034 /* We now know the final size of the .loader section. Allocate
3035 space for it. */
3036 lsec = xcoff_hash_table (info)->loader_section;
3037 lsec->size = stoff + ldhdr->l_stlen;
3038 lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->size);
3039 if (lsec->contents == NULL)
3040 goto error_return;
3042 /* Set up the header. */
3043 bfd_xcoff_swap_ldhdr_out (output_bfd, ldhdr, lsec->contents);
3045 /* Set up the import file names. */
3046 out = (char *) lsec->contents + ldhdr->l_impoff;
3047 strcpy (out, libpath);
3048 out += strlen (libpath) + 1;
3049 *out++ = '\0';
3050 *out++ = '\0';
3051 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
3053 register const char *s;
3055 s = fl->path;
3056 while ((*out++ = *s++) != '\0')
3058 s = fl->file;
3059 while ((*out++ = *s++) != '\0')
3061 s = fl->member;
3062 while ((*out++ = *s++) != '\0')
3066 BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
3068 /* Set up the symbol string table. */
3069 if (ldinfo.string_size > 0)
3071 memcpy (out, ldinfo.strings, ldinfo.string_size);
3072 free (ldinfo.strings);
3073 ldinfo.strings = NULL;
3076 /* We can't set up the symbol table or the relocs yet, because we
3077 don't yet know the final position of the various sections. The
3078 .loader symbols are written out when the corresponding normal
3079 symbols are written out in xcoff_link_input_bfd or
3080 xcoff_write_global_symbol. The .loader relocs are written out
3081 when the corresponding normal relocs are handled in
3082 xcoff_link_input_bfd.
3085 /* Allocate space for the magic sections. */
3086 sec = xcoff_hash_table (info)->linkage_section;
3087 if (sec->size > 0)
3089 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->size);
3090 if (sec->contents == NULL)
3091 goto error_return;
3093 sec = xcoff_hash_table (info)->toc_section;
3094 if (sec->size > 0)
3096 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->size);
3097 if (sec->contents == NULL)
3098 goto error_return;
3100 sec = xcoff_hash_table (info)->descriptor_section;
3101 if (sec->size > 0)
3103 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->size);
3104 if (sec->contents == NULL)
3105 goto error_return;
3108 /* Now that we've done garbage collection, figure out the contents
3109 of the .debug section. */
3110 debug_strtab = xcoff_hash_table (info)->debug_strtab;
3112 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3114 asection *subdeb;
3115 bfd_size_type symcount;
3116 unsigned long *debug_index;
3117 asection **csectpp;
3118 bfd_byte *esym, *esymend;
3119 bfd_size_type symesz;
3121 if (sub->xvec != info->hash->creator)
3122 continue;
3123 subdeb = bfd_get_section_by_name (sub, ".debug");
3124 if (subdeb == NULL || subdeb->size == 0)
3125 continue;
3127 if (info->strip == strip_all
3128 || info->strip == strip_debugger
3129 || info->discard == discard_all)
3131 subdeb->size = 0;
3132 continue;
3135 if (! _bfd_coff_get_external_symbols (sub))
3136 goto error_return;
3138 symcount = obj_raw_syment_count (sub);
3139 debug_index = ((unsigned long *)
3140 bfd_zalloc (sub, symcount * sizeof (unsigned long)));
3141 if (debug_index == NULL)
3142 goto error_return;
3143 xcoff_data (sub)->debug_indices = debug_index;
3145 /* Grab the contents of the .debug section. We use malloc and
3146 copy the names into the debug stringtab, rather than
3147 bfd_alloc, because I expect that, when linking many files
3148 together, many of the strings will be the same. Storing the
3149 strings in the hash table should save space in this case. */
3150 if (!bfd_malloc_and_get_section (sub, subdeb, &debug_contents))
3151 goto error_return;
3153 csectpp = xcoff_data (sub)->csects;
3155 /* Dynamic object do not have csectpp's. */
3156 if (NULL != csectpp)
3158 symesz = bfd_coff_symesz (sub);
3159 esym = (bfd_byte *) obj_coff_external_syms (sub);
3160 esymend = esym + symcount * symesz;
3162 while (esym < esymend)
3164 struct internal_syment sym;
3166 bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
3168 *debug_index = (unsigned long) -1;
3170 if (sym._n._n_n._n_zeroes == 0
3171 && *csectpp != NULL
3172 && (! gc
3173 || ((*csectpp)->flags & SEC_MARK) != 0
3174 || *csectpp == bfd_abs_section_ptr)
3175 && bfd_coff_symname_in_debug (sub, &sym))
3177 char *name;
3178 bfd_size_type indx;
3180 name = (char *) debug_contents + sym._n._n_n._n_offset;
3181 indx = _bfd_stringtab_add (debug_strtab, name, TRUE, TRUE);
3182 if (indx == (bfd_size_type) -1)
3183 goto error_return;
3184 *debug_index = indx;
3187 esym += (sym.n_numaux + 1) * symesz;
3188 csectpp += sym.n_numaux + 1;
3189 debug_index += sym.n_numaux + 1;
3193 free (debug_contents);
3194 debug_contents = NULL;
3196 /* Clear the size of subdeb, so that it is not included directly
3197 in the output file. */
3198 subdeb->size = 0;
3200 if (! info->keep_memory)
3202 if (! _bfd_coff_free_symbols (sub))
3203 goto error_return;
3207 if (info->strip != strip_all)
3208 xcoff_hash_table (info)->debug_section->size =
3209 _bfd_stringtab_size (debug_strtab);
3211 return TRUE;
3213 error_return:
3214 if (ldinfo.strings != NULL)
3215 free (ldinfo.strings);
3216 if (debug_contents != NULL)
3217 free (debug_contents);
3218 return FALSE;
3221 bfd_boolean
3222 bfd_xcoff_link_generate_rtinit (abfd, init, fini, rtld)
3223 bfd *abfd;
3224 const char *init;
3225 const char *fini;
3226 bfd_boolean rtld;
3228 struct bfd_in_memory *bim;
3230 bim = ((struct bfd_in_memory *)
3231 bfd_malloc ((bfd_size_type) sizeof (struct bfd_in_memory)));
3232 if (bim == NULL)
3233 return FALSE;
3235 bim->size = 0;
3236 bim->buffer = 0;
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;
3243 abfd->where = 0;
3245 if (! bfd_xcoff_generate_rtinit (abfd, init, fini, rtld))
3246 return FALSE;
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;
3251 abfd->where = 0;
3253 return TRUE;
3257 /* Add a symbol to the .loader symbols, if necessary. */
3259 static bfd_boolean
3260 xcoff_build_ldsyms (h, p)
3261 struct xcoff_link_hash_entry *h;
3262 PTR p;
3264 struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
3265 bfd_size_type amt;
3267 if (h->root.type == bfd_link_hash_warning)
3268 h = (struct xcoff_link_hash_entry *) h->root.u.i.link;
3270 /* __rtinit, this symbol has special handling. */
3271 if (h->flags & XCOFF_RTINIT)
3272 return TRUE;
3274 /* If this is a final link, and the symbol was defined as a common
3275 symbol in a regular object file, and there was no definition in
3276 any dynamic object, then the linker will have allocated space for
3277 the symbol in a common section but the XCOFF_DEF_REGULAR flag
3278 will not have been set. */
3279 if (h->root.type == bfd_link_hash_defined
3280 && (h->flags & XCOFF_DEF_REGULAR) == 0
3281 && (h->flags & XCOFF_REF_REGULAR) != 0
3282 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3283 && (bfd_is_abs_section (h->root.u.def.section)
3284 || (h->root.u.def.section->owner->flags & DYNAMIC) == 0))
3285 h->flags |= XCOFF_DEF_REGULAR;
3287 /* If all defined symbols should be exported, mark them now. We
3288 don't want to export the actual functions, just the function
3289 descriptors. */
3290 if (ldinfo->export_defineds
3291 && (h->flags & XCOFF_DEF_REGULAR) != 0
3292 && h->root.root.string[0] != '.')
3294 bfd_boolean export;
3296 /* We don't export a symbol which is being defined by an object
3297 included from an archive which contains a shared object. The
3298 rationale is that if an archive contains both an unshared and
3299 a shared object, then there must be some reason that the
3300 unshared object is unshared, and we don't want to start
3301 providing a shared version of it. In particular, this solves
3302 a bug involving the _savefNN set of functions. gcc will call
3303 those functions without providing a slot to restore the TOC,
3304 so it is essential that these functions be linked in directly
3305 and not from a shared object, which means that a shared
3306 object which also happens to link them in must not export
3307 them. This is confusing, but I haven't been able to think of
3308 a different approach. Note that the symbols can, of course,
3309 be exported explicitly. */
3310 export = TRUE;
3311 if ((h->root.type == bfd_link_hash_defined
3312 || h->root.type == bfd_link_hash_defweak)
3313 && h->root.u.def.section->owner != NULL
3314 && h->root.u.def.section->owner->my_archive != NULL)
3316 bfd *arbfd, *member;
3318 arbfd = h->root.u.def.section->owner->my_archive;
3319 member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL);
3320 while (member != NULL)
3322 if ((member->flags & DYNAMIC) != 0)
3324 export = FALSE;
3325 break;
3327 member = bfd_openr_next_archived_file (arbfd, member);
3331 if (export)
3332 h->flags |= XCOFF_EXPORT;
3335 /* We don't want to garbage collect symbols which are not defined in
3336 XCOFF files. This is a convenient place to mark them. */
3337 if (xcoff_hash_table (ldinfo->info)->gc
3338 && (h->flags & XCOFF_MARK) == 0
3339 && (h->root.type == bfd_link_hash_defined
3340 || h->root.type == bfd_link_hash_defweak)
3341 && (h->root.u.def.section->owner == NULL
3342 || (h->root.u.def.section->owner->xvec
3343 != ldinfo->info->hash->creator)))
3344 h->flags |= XCOFF_MARK;
3346 /* If this symbol is called and defined in a dynamic object, or it
3347 is imported, then we need to set up global linkage code for it.
3348 (Unless we did garbage collection and we didn't need this
3349 symbol.) */
3350 if ((h->flags & XCOFF_CALLED) != 0
3351 && (h->root.type == bfd_link_hash_undefined
3352 || h->root.type == bfd_link_hash_undefweak)
3353 && h->root.root.string[0] == '.'
3354 && h->descriptor != NULL
3355 && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
3356 || ((h->descriptor->flags & XCOFF_IMPORT) != 0
3357 && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
3358 && (! xcoff_hash_table (ldinfo->info)->gc
3359 || (h->flags & XCOFF_MARK) != 0))
3361 asection *sec;
3362 struct xcoff_link_hash_entry *hds;
3364 sec = xcoff_hash_table (ldinfo->info)->linkage_section;
3365 h->root.type = bfd_link_hash_defined;
3366 h->root.u.def.section = sec;
3367 h->root.u.def.value = sec->size;
3368 h->smclas = XMC_GL;
3369 h->flags |= XCOFF_DEF_REGULAR;
3370 sec->size += bfd_xcoff_glink_code_size(ldinfo->output_bfd);
3372 /* The global linkage code requires a TOC entry for the
3373 descriptor. */
3374 hds = h->descriptor;
3375 BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
3376 || hds->root.type == bfd_link_hash_undefweak)
3377 && (hds->flags & XCOFF_DEF_REGULAR) == 0);
3378 hds->flags |= XCOFF_MARK;
3379 if (hds->toc_section == NULL)
3381 int byte_size;
3383 /* 32 vs 64
3384 xcoff32 uses 4 bytes in the toc.
3385 xcoff64 uses 8 bytes in the toc. */
3386 if (bfd_xcoff_is_xcoff64 (ldinfo->output_bfd))
3387 byte_size = 8;
3388 else if (bfd_xcoff_is_xcoff32 (ldinfo->output_bfd))
3389 byte_size = 4;
3390 else
3391 return FALSE;
3393 hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
3394 hds->u.toc_offset = hds->toc_section->size;
3395 hds->toc_section->size += byte_size;
3396 ++xcoff_hash_table (ldinfo->info)->ldrel_count;
3397 ++hds->toc_section->reloc_count;
3398 hds->indx = -2;
3399 hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
3401 /* We need to call xcoff_build_ldsyms recursively here,
3402 because we may already have passed hds on the traversal. */
3403 xcoff_build_ldsyms (hds, p);
3407 /* If this symbol is exported, but not defined, we need to try to
3408 define it. */
3409 if ((h->flags & XCOFF_EXPORT) != 0
3410 && (h->flags & XCOFF_IMPORT) == 0
3411 && (h->flags & XCOFF_DEF_REGULAR) == 0
3412 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
3413 && (h->root.type == bfd_link_hash_undefined
3414 || h->root.type == bfd_link_hash_undefweak))
3416 if ((h->flags & XCOFF_DESCRIPTOR) != 0
3417 && (h->descriptor->root.type == bfd_link_hash_defined
3418 || h->descriptor->root.type == bfd_link_hash_defweak))
3420 asection *sec;
3422 /* This is an undefined function descriptor associated with
3423 a defined entry point. We can build up a function
3424 descriptor ourselves. Believe it or not, the AIX linker
3425 actually does this, and there are cases where we need to
3426 do it as well. */
3427 sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
3428 h->root.type = bfd_link_hash_defined;
3429 h->root.u.def.section = sec;
3430 h->root.u.def.value = sec->size;
3431 h->smclas = XMC_DS;
3432 h->flags |= XCOFF_DEF_REGULAR;
3434 /* The size of the function descriptor depends if this is an
3435 xcoff32 (12) or xcoff64 (24). */
3436 sec->size +=
3437 bfd_xcoff_function_descriptor_size(ldinfo->output_bfd);
3439 /* A function descriptor uses two relocs: one for the
3440 associated code, and one for the TOC address. */
3441 xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
3442 sec->reloc_count += 2;
3444 /* We handle writing out the contents of the descriptor in
3445 xcoff_write_global_symbol. */
3447 else
3449 (*_bfd_error_handler)
3450 (_("warning: attempt to export undefined symbol `%s'"),
3451 h->root.root.string);
3452 h->ldsym = NULL;
3453 return TRUE;
3457 /* If this is still a common symbol, and it wasn't garbage
3458 collected, we need to actually allocate space for it in the .bss
3459 section. */
3460 if (h->root.type == bfd_link_hash_common
3461 && (! xcoff_hash_table (ldinfo->info)->gc
3462 || (h->flags & XCOFF_MARK) != 0)
3463 && h->root.u.c.p->section->size == 0)
3465 BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
3466 h->root.u.c.p->section->size = h->root.u.c.size;
3469 /* We need to add a symbol to the .loader section if it is mentioned
3470 in a reloc which we are copying to the .loader section and it was
3471 not defined or common, or if it is the entry point, or if it is
3472 being exported. */
3474 if (((h->flags & XCOFF_LDREL) == 0
3475 || h->root.type == bfd_link_hash_defined
3476 || h->root.type == bfd_link_hash_defweak
3477 || h->root.type == bfd_link_hash_common)
3478 && (h->flags & XCOFF_ENTRY) == 0
3479 && (h->flags & XCOFF_EXPORT) == 0)
3481 h->ldsym = NULL;
3482 return TRUE;
3485 /* We don't need to add this symbol if we did garbage collection and
3486 we did not mark this symbol. */
3487 if (xcoff_hash_table (ldinfo->info)->gc
3488 && (h->flags & XCOFF_MARK) == 0)
3490 h->ldsym = NULL;
3491 return TRUE;
3494 /* We may have already processed this symbol due to the recursive
3495 call above. */
3496 if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
3497 return TRUE;
3499 /* We need to add this symbol to the .loader symbols. */
3501 BFD_ASSERT (h->ldsym == NULL);
3502 amt = sizeof (struct internal_ldsym);
3503 h->ldsym = (struct internal_ldsym *) bfd_zalloc (ldinfo->output_bfd, amt);
3504 if (h->ldsym == NULL)
3506 ldinfo->failed = TRUE;
3507 return FALSE;
3510 if ((h->flags & XCOFF_IMPORT) != 0)
3511 h->ldsym->l_ifile = h->ldindx;
3513 /* The first 3 symbol table indices are reserved to indicate the
3514 data, text and bss sections. */
3515 h->ldindx = ldinfo->ldsym_count + 3;
3517 ++ldinfo->ldsym_count;
3519 if (! bfd_xcoff_put_ldsymbol_name (ldinfo->output_bfd, ldinfo,
3520 h->ldsym, h->root.root.string))
3522 return FALSE;
3525 h->flags |= XCOFF_BUILT_LDSYM;
3527 return TRUE;
3530 /* Do the final link step. */
3532 bfd_boolean
3533 _bfd_xcoff_bfd_final_link (abfd, info)
3534 bfd *abfd;
3535 struct bfd_link_info *info;
3537 bfd_size_type symesz;
3538 struct xcoff_final_link_info finfo;
3539 asection *o;
3540 struct bfd_link_order *p;
3541 bfd_size_type max_contents_size;
3542 bfd_size_type max_sym_count;
3543 bfd_size_type max_lineno_count;
3544 bfd_size_type max_reloc_count;
3545 bfd_size_type max_output_reloc_count;
3546 file_ptr rel_filepos;
3547 unsigned int relsz;
3548 file_ptr line_filepos;
3549 unsigned int linesz;
3550 bfd *sub;
3551 bfd_byte *external_relocs = NULL;
3552 char strbuf[STRING_SIZE_SIZE];
3553 file_ptr pos;
3554 bfd_size_type amt;
3556 if (info->shared)
3557 abfd->flags |= DYNAMIC;
3559 symesz = bfd_coff_symesz (abfd);
3561 finfo.info = info;
3562 finfo.output_bfd = abfd;
3563 finfo.strtab = NULL;
3564 finfo.section_info = NULL;
3565 finfo.last_file_index = -1;
3566 finfo.toc_symindx = -1;
3567 finfo.internal_syms = NULL;
3568 finfo.sym_indices = NULL;
3569 finfo.outsyms = NULL;
3570 finfo.linenos = NULL;
3571 finfo.contents = NULL;
3572 finfo.external_relocs = NULL;
3574 finfo.ldsym = (xcoff_hash_table (info)->loader_section->contents
3575 + bfd_xcoff_ldhdrsz (abfd));
3576 finfo.ldrel = (xcoff_hash_table (info)->loader_section->contents
3577 + bfd_xcoff_ldhdrsz(abfd)
3578 + (xcoff_hash_table (info)->ldhdr.l_nsyms
3579 * bfd_xcoff_ldsymsz(abfd)));
3581 xcoff_data (abfd)->coff.link_info = info;
3583 finfo.strtab = _bfd_stringtab_init ();
3584 if (finfo.strtab == NULL)
3585 goto error_return;
3587 /* Count the line number and relocation entries required for the
3588 output file. Determine a few maximum sizes. */
3589 max_contents_size = 0;
3590 max_lineno_count = 0;
3591 max_reloc_count = 0;
3592 for (o = abfd->sections; o != NULL; o = o->next)
3594 o->reloc_count = 0;
3595 o->lineno_count = 0;
3596 for (p = o->link_order_head; p != NULL; p = p->next)
3598 if (p->type == bfd_indirect_link_order)
3600 asection *sec;
3602 sec = p->u.indirect.section;
3604 /* Mark all sections which are to be included in the
3605 link. This will normally be every section. We need
3606 to do this so that we can identify any sections which
3607 the linker has decided to not include. */
3608 sec->linker_mark = TRUE;
3610 if (info->strip == strip_none
3611 || info->strip == strip_some)
3612 o->lineno_count += sec->lineno_count;
3614 o->reloc_count += sec->reloc_count;
3616 if (sec->rawsize > max_contents_size)
3617 max_contents_size = sec->rawsize;
3618 if (sec->size > max_contents_size)
3619 max_contents_size = sec->size;
3620 if (sec->lineno_count > max_lineno_count)
3621 max_lineno_count = sec->lineno_count;
3622 if (coff_section_data (sec->owner, sec) != NULL
3623 && xcoff_section_data (sec->owner, sec) != NULL
3624 && (xcoff_section_data (sec->owner, sec)->lineno_count
3625 > max_lineno_count))
3626 max_lineno_count =
3627 xcoff_section_data (sec->owner, sec)->lineno_count;
3628 if (sec->reloc_count > max_reloc_count)
3629 max_reloc_count = sec->reloc_count;
3631 else if (p->type == bfd_section_reloc_link_order
3632 || p->type == bfd_symbol_reloc_link_order)
3633 ++o->reloc_count;
3637 /* Compute the file positions for all the sections. */
3638 if (abfd->output_has_begun)
3640 if (xcoff_hash_table (info)->file_align != 0)
3641 abort ();
3643 else
3645 bfd_vma file_align;
3647 file_align = xcoff_hash_table (info)->file_align;
3648 if (file_align != 0)
3650 bfd_boolean saw_contents;
3651 int indx;
3652 asection **op;
3653 file_ptr sofar;
3655 /* Insert .pad sections before every section which has
3656 contents and is loaded, if it is preceded by some other
3657 section which has contents and is loaded. */
3658 saw_contents = TRUE;
3659 for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
3661 if (strcmp ((*op)->name, ".pad") == 0)
3662 saw_contents = FALSE;
3663 else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
3664 && ((*op)->flags & SEC_LOAD) != 0)
3666 if (! saw_contents)
3667 saw_contents = TRUE;
3668 else
3670 asection *n, **st;
3672 /* Create a pad section and place it before the section
3673 that needs padding. This requires unlinking and
3674 relinking the bfd's section list. */
3676 st = abfd->section_tail;
3677 n = bfd_make_section_anyway (abfd, ".pad");
3678 n->flags = SEC_HAS_CONTENTS;
3679 n->alignment_power = 0;
3681 BFD_ASSERT (*st == n);
3682 bfd_section_list_remove (abfd, st);
3683 bfd_section_list_insert (abfd, op, n);
3685 op = &n->next;
3686 saw_contents = FALSE;
3691 /* Reset the section indices after inserting the new
3692 sections. */
3693 indx = 0;
3694 for (o = abfd->sections; o != NULL; o = o->next)
3696 ++indx;
3697 o->target_index = indx;
3699 BFD_ASSERT ((unsigned int) indx == abfd->section_count);
3701 /* Work out appropriate sizes for the .pad sections to force
3702 each section to land on a page boundary. This bit of
3703 code knows what compute_section_file_positions is going
3704 to do. */
3705 sofar = bfd_coff_filhsz (abfd);
3706 sofar += bfd_coff_aoutsz (abfd);
3707 sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
3708 for (o = abfd->sections; o != NULL; o = o->next)
3709 if ((bfd_xcoff_is_reloc_count_overflow
3710 (abfd, (bfd_vma) o->reloc_count))
3711 || (bfd_xcoff_is_lineno_count_overflow
3712 (abfd, (bfd_vma) o->lineno_count)))
3713 /* 64 does not overflow, need to check if 32 does */
3714 sofar += bfd_coff_scnhsz (abfd);
3716 for (o = abfd->sections; o != NULL; o = o->next)
3718 if (strcmp (o->name, ".pad") == 0)
3720 bfd_vma pageoff;
3722 BFD_ASSERT (o->size == 0);
3723 pageoff = sofar & (file_align - 1);
3724 if (pageoff != 0)
3726 o->size = file_align - pageoff;
3727 sofar += file_align - pageoff;
3728 o->flags |= SEC_HAS_CONTENTS;
3731 else
3733 if ((o->flags & SEC_HAS_CONTENTS) != 0)
3734 sofar += BFD_ALIGN (o->size,
3735 1 << o->alignment_power);
3740 if (! bfd_coff_compute_section_file_positions (abfd))
3741 goto error_return;
3744 /* Allocate space for the pointers we need to keep for the relocs. */
3746 unsigned int i;
3748 /* We use section_count + 1, rather than section_count, because
3749 the target_index fields are 1 based. */
3750 amt = abfd->section_count + 1;
3751 amt *= sizeof (struct xcoff_link_section_info);
3752 finfo.section_info = (struct xcoff_link_section_info *) bfd_malloc (amt);
3753 if (finfo.section_info == NULL)
3754 goto error_return;
3755 for (i = 0; i <= abfd->section_count; i++)
3757 finfo.section_info[i].relocs = NULL;
3758 finfo.section_info[i].rel_hashes = NULL;
3759 finfo.section_info[i].toc_rel_hashes = NULL;
3763 /* Set the file positions for the relocs. */
3764 rel_filepos = obj_relocbase (abfd);
3765 relsz = bfd_coff_relsz (abfd);
3766 max_output_reloc_count = 0;
3767 for (o = abfd->sections; o != NULL; o = o->next)
3769 if (o->reloc_count == 0)
3770 o->rel_filepos = 0;
3771 else
3773 /* A stripped file has no relocs. However, we still
3774 allocate the buffers, so that later code doesn't have to
3775 worry about whether we are stripping or not. */
3776 if (info->strip == strip_all)
3777 o->rel_filepos = 0;
3778 else
3780 o->flags |= SEC_RELOC;
3781 o->rel_filepos = rel_filepos;
3782 rel_filepos += o->reloc_count * relsz;
3785 /* We don't know the indices of global symbols until we have
3786 written out all the local symbols. For each section in
3787 the output file, we keep an array of pointers to hash
3788 table entries. Each entry in the array corresponds to a
3789 reloc. When we find a reloc against a global symbol, we
3790 set the corresponding entry in this array so that we can
3791 fix up the symbol index after we have written out all the
3792 local symbols.
3794 Because of this problem, we also keep the relocs in
3795 memory until the end of the link. This wastes memory.
3796 We could backpatch the file later, I suppose, although it
3797 would be slow. */
3798 amt = o->reloc_count;
3799 amt *= sizeof (struct internal_reloc);
3800 finfo.section_info[o->target_index].relocs =
3801 (struct internal_reloc *) bfd_malloc (amt);
3803 amt = o->reloc_count;
3804 amt *= sizeof (struct xcoff_link_hash_entry *);
3805 finfo.section_info[o->target_index].rel_hashes =
3806 (struct xcoff_link_hash_entry **) bfd_malloc (amt);
3808 if (finfo.section_info[o->target_index].relocs == NULL
3809 || finfo.section_info[o->target_index].rel_hashes == NULL)
3810 goto error_return;
3812 if (o->reloc_count > max_output_reloc_count)
3813 max_output_reloc_count = o->reloc_count;
3817 /* We now know the size of the relocs, so we can determine the file
3818 positions of the line numbers. */
3819 line_filepos = rel_filepos;
3820 finfo.line_filepos = line_filepos;
3821 linesz = bfd_coff_linesz (abfd);
3822 for (o = abfd->sections; o != NULL; o = o->next)
3824 if (o->lineno_count == 0)
3825 o->line_filepos = 0;
3826 else
3828 o->line_filepos = line_filepos;
3829 line_filepos += o->lineno_count * linesz;
3832 /* Reset the reloc and lineno counts, so that we can use them to
3833 count the number of entries we have output so far. */
3834 o->reloc_count = 0;
3835 o->lineno_count = 0;
3838 obj_sym_filepos (abfd) = line_filepos;
3840 /* Figure out the largest number of symbols in an input BFD. Take
3841 the opportunity to clear the output_has_begun fields of all the
3842 input BFD's. We want at least 6 symbols, since that is the
3843 number which xcoff_write_global_symbol may need. */
3844 max_sym_count = 6;
3845 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3847 bfd_size_type sz;
3849 sub->output_has_begun = FALSE;
3850 sz = obj_raw_syment_count (sub);
3851 if (sz > max_sym_count)
3852 max_sym_count = sz;
3855 /* Allocate some buffers used while linking. */
3856 amt = max_sym_count * sizeof (struct internal_syment);
3857 finfo.internal_syms = (struct internal_syment *) bfd_malloc (amt);
3859 amt = max_sym_count * sizeof (long);
3860 finfo.sym_indices = (long *) bfd_malloc (amt);
3862 amt = (max_sym_count + 1) * symesz;
3863 finfo.outsyms = (bfd_byte *) bfd_malloc (amt);
3865 amt = max_lineno_count * bfd_coff_linesz (abfd);
3866 finfo.linenos = (bfd_byte *) bfd_malloc (amt);
3868 amt = max_contents_size;
3869 finfo.contents = (bfd_byte *) bfd_malloc (amt);
3871 amt = max_reloc_count * relsz;
3872 finfo.external_relocs = (bfd_byte *) bfd_malloc (amt);
3874 if ((finfo.internal_syms == NULL && max_sym_count > 0)
3875 || (finfo.sym_indices == NULL && max_sym_count > 0)
3876 || finfo.outsyms == NULL
3877 || (finfo.linenos == NULL && max_lineno_count > 0)
3878 || (finfo.contents == NULL && max_contents_size > 0)
3879 || (finfo.external_relocs == NULL && max_reloc_count > 0))
3880 goto error_return;
3882 obj_raw_syment_count (abfd) = 0;
3883 xcoff_data (abfd)->toc = (bfd_vma) -1;
3885 /* We now know the position of everything in the file, except that
3886 we don't know the size of the symbol table and therefore we don't
3887 know where the string table starts. We just build the string
3888 table in memory as we go along. We process all the relocations
3889 for a single input file at once. */
3890 for (o = abfd->sections; o != NULL; o = o->next)
3892 for (p = o->link_order_head; p != NULL; p = p->next)
3894 if (p->type == bfd_indirect_link_order
3895 && p->u.indirect.section->owner->xvec == abfd->xvec)
3897 sub = p->u.indirect.section->owner;
3898 if (! sub->output_has_begun)
3900 if (! xcoff_link_input_bfd (&finfo, sub))
3901 goto error_return;
3902 sub->output_has_begun = TRUE;
3905 else if (p->type == bfd_section_reloc_link_order
3906 || p->type == bfd_symbol_reloc_link_order)
3908 if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
3909 goto error_return;
3911 else
3913 if (! _bfd_default_link_order (abfd, info, o, p))
3914 goto error_return;
3920 /* Free up the buffers used by xcoff_link_input_bfd. */
3922 if (finfo.internal_syms != NULL)
3924 free (finfo.internal_syms);
3925 finfo.internal_syms = NULL;
3927 if (finfo.sym_indices != NULL)
3929 free (finfo.sym_indices);
3930 finfo.sym_indices = NULL;
3932 if (finfo.linenos != NULL)
3934 free (finfo.linenos);
3935 finfo.linenos = NULL;
3937 if (finfo.contents != NULL)
3939 free (finfo.contents);
3940 finfo.contents = NULL;
3942 if (finfo.external_relocs != NULL)
3944 free (finfo.external_relocs);
3945 finfo.external_relocs = NULL;
3948 /* The value of the last C_FILE symbol is supposed to be -1. Write
3949 it out again. */
3950 if (finfo.last_file_index != -1)
3952 finfo.last_file.n_value = -(bfd_vma) 1;
3953 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
3954 (PTR) finfo.outsyms);
3955 pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz;
3956 if (bfd_seek (abfd, pos, SEEK_SET) != 0
3957 || bfd_bwrite (finfo.outsyms, symesz, abfd) != symesz)
3958 goto error_return;
3961 /* Write out all the global symbols which do not come from XCOFF
3962 input files. */
3963 xcoff_link_hash_traverse (xcoff_hash_table (info),
3964 xcoff_write_global_symbol,
3965 (PTR) &finfo);
3967 if (finfo.outsyms != NULL)
3969 free (finfo.outsyms);
3970 finfo.outsyms = NULL;
3973 /* Now that we have written out all the global symbols, we know the
3974 symbol indices to use for relocs against them, and we can finally
3975 write out the relocs. */
3976 amt = max_output_reloc_count * relsz;
3977 external_relocs = (bfd_byte *) bfd_malloc (amt);
3978 if (external_relocs == NULL && max_output_reloc_count != 0)
3979 goto error_return;
3981 for (o = abfd->sections; o != NULL; o = o->next)
3983 struct internal_reloc *irel;
3984 struct internal_reloc *irelend;
3985 struct xcoff_link_hash_entry **rel_hash;
3986 struct xcoff_toc_rel_hash *toc_rel_hash;
3987 bfd_byte *erel;
3988 bfd_size_type rel_size;
3990 /* A stripped file has no relocs. */
3991 if (info->strip == strip_all)
3993 o->reloc_count = 0;
3994 continue;
3997 if (o->reloc_count == 0)
3998 continue;
4000 irel = finfo.section_info[o->target_index].relocs;
4001 irelend = irel + o->reloc_count;
4002 rel_hash = finfo.section_info[o->target_index].rel_hashes;
4003 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4005 if (*rel_hash != NULL)
4007 if ((*rel_hash)->indx < 0)
4009 if (! ((*info->callbacks->unattached_reloc)
4010 (info, (*rel_hash)->root.root.string,
4011 (bfd *) NULL, o, irel->r_vaddr)))
4012 goto error_return;
4013 (*rel_hash)->indx = 0;
4015 irel->r_symndx = (*rel_hash)->indx;
4019 for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
4020 toc_rel_hash != NULL;
4021 toc_rel_hash = toc_rel_hash->next)
4023 if (toc_rel_hash->h->u.toc_indx < 0)
4025 if (! ((*info->callbacks->unattached_reloc)
4026 (info, toc_rel_hash->h->root.root.string,
4027 (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
4028 goto error_return;
4029 toc_rel_hash->h->u.toc_indx = 0;
4031 toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
4034 /* XCOFF requires that the relocs be sorted by address. We tend
4035 to produce them in the order in which their containing csects
4036 appear in the symbol table, which is not necessarily by
4037 address. So we sort them here. There may be a better way to
4038 do this. */
4039 qsort ((PTR) finfo.section_info[o->target_index].relocs,
4040 o->reloc_count, sizeof (struct internal_reloc),
4041 xcoff_sort_relocs);
4043 irel = finfo.section_info[o->target_index].relocs;
4044 irelend = irel + o->reloc_count;
4045 erel = external_relocs;
4046 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
4047 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
4049 rel_size = relsz * o->reloc_count;
4050 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
4051 || bfd_bwrite ((PTR) external_relocs, rel_size, abfd) != rel_size)
4052 goto error_return;
4055 if (external_relocs != NULL)
4057 free (external_relocs);
4058 external_relocs = NULL;
4061 /* Free up the section information. */
4062 if (finfo.section_info != NULL)
4064 unsigned int i;
4066 for (i = 0; i < abfd->section_count; i++)
4068 if (finfo.section_info[i].relocs != NULL)
4069 free (finfo.section_info[i].relocs);
4070 if (finfo.section_info[i].rel_hashes != NULL)
4071 free (finfo.section_info[i].rel_hashes);
4073 free (finfo.section_info);
4074 finfo.section_info = NULL;
4077 /* Write out the loader section contents. */
4078 BFD_ASSERT ((bfd_byte *) finfo.ldrel
4079 == (xcoff_hash_table (info)->loader_section->contents
4080 + xcoff_hash_table (info)->ldhdr.l_impoff));
4081 o = xcoff_hash_table (info)->loader_section;
4082 if (! bfd_set_section_contents (abfd, o->output_section, o->contents,
4083 (file_ptr) o->output_offset, o->size))
4084 goto error_return;
4086 /* Write out the magic sections. */
4087 o = xcoff_hash_table (info)->linkage_section;
4088 if (o->size > 0
4089 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4090 (file_ptr) o->output_offset,
4091 o->size))
4092 goto error_return;
4093 o = xcoff_hash_table (info)->toc_section;
4094 if (o->size > 0
4095 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4096 (file_ptr) o->output_offset,
4097 o->size))
4098 goto error_return;
4099 o = xcoff_hash_table (info)->descriptor_section;
4100 if (o->size > 0
4101 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
4102 (file_ptr) o->output_offset,
4103 o->size))
4104 goto error_return;
4106 /* Write out the string table. */
4107 pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
4108 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4109 goto error_return;
4110 H_PUT_32 (abfd,
4111 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
4112 strbuf);
4113 amt = STRING_SIZE_SIZE;
4114 if (bfd_bwrite (strbuf, amt, abfd) != amt)
4115 goto error_return;
4116 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
4117 goto error_return;
4119 _bfd_stringtab_free (finfo.strtab);
4121 /* Write out the debugging string table. */
4122 o = xcoff_hash_table (info)->debug_section;
4123 if (o != NULL)
4125 struct bfd_strtab_hash *debug_strtab;
4127 debug_strtab = xcoff_hash_table (info)->debug_strtab;
4128 BFD_ASSERT (o->output_section->size - o->output_offset
4129 >= _bfd_stringtab_size (debug_strtab));
4130 pos = o->output_section->filepos + o->output_offset;
4131 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4132 goto error_return;
4133 if (! _bfd_stringtab_emit (abfd, debug_strtab))
4134 goto error_return;
4137 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
4138 not try to write out the symbols. */
4139 bfd_get_symcount (abfd) = 0;
4141 return TRUE;
4143 error_return:
4144 if (finfo.strtab != NULL)
4145 _bfd_stringtab_free (finfo.strtab);
4147 if (finfo.section_info != NULL)
4149 unsigned int i;
4151 for (i = 0; i < abfd->section_count; i++)
4153 if (finfo.section_info[i].relocs != NULL)
4154 free (finfo.section_info[i].relocs);
4155 if (finfo.section_info[i].rel_hashes != NULL)
4156 free (finfo.section_info[i].rel_hashes);
4158 free (finfo.section_info);
4161 if (finfo.internal_syms != NULL)
4162 free (finfo.internal_syms);
4163 if (finfo.sym_indices != NULL)
4164 free (finfo.sym_indices);
4165 if (finfo.outsyms != NULL)
4166 free (finfo.outsyms);
4167 if (finfo.linenos != NULL)
4168 free (finfo.linenos);
4169 if (finfo.contents != NULL)
4170 free (finfo.contents);
4171 if (finfo.external_relocs != NULL)
4172 free (finfo.external_relocs);
4173 if (external_relocs != NULL)
4174 free (external_relocs);
4175 return FALSE;
4178 /* Link an input file into the linker output file. This function
4179 handles all the sections and relocations of the input file at once. */
4181 static bfd_boolean
4182 xcoff_link_input_bfd (finfo, input_bfd)
4183 struct xcoff_final_link_info *finfo;
4184 bfd *input_bfd;
4186 bfd *output_bfd;
4187 const char *strings;
4188 bfd_size_type syment_base;
4189 unsigned int n_tmask;
4190 unsigned int n_btshft;
4191 bfd_boolean copy, hash;
4192 bfd_size_type isymesz;
4193 bfd_size_type osymesz;
4194 bfd_size_type linesz;
4195 bfd_byte *esym;
4196 bfd_byte *esym_end;
4197 struct xcoff_link_hash_entry **sym_hash;
4198 struct internal_syment *isymp;
4199 asection **csectpp;
4200 unsigned long *debug_index;
4201 long *indexp;
4202 unsigned long output_index;
4203 bfd_byte *outsym;
4204 unsigned int incls;
4205 asection *oline;
4206 bfd_boolean keep_syms;
4207 asection *o;
4209 /* We can just skip DYNAMIC files, unless this is a static link. */
4210 if ((input_bfd->flags & DYNAMIC) != 0
4211 && ! finfo->info->static_link)
4212 return TRUE;
4214 /* Move all the symbols to the output file. */
4216 output_bfd = finfo->output_bfd;
4217 strings = NULL;
4218 syment_base = obj_raw_syment_count (output_bfd);
4219 isymesz = bfd_coff_symesz (input_bfd);
4220 osymesz = bfd_coff_symesz (output_bfd);
4221 linesz = bfd_coff_linesz (input_bfd);
4222 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
4224 n_tmask = coff_data (input_bfd)->local_n_tmask;
4225 n_btshft = coff_data (input_bfd)->local_n_btshft;
4227 /* Define macros so that ISFCN, et. al., macros work correctly. */
4228 #define N_TMASK n_tmask
4229 #define N_BTSHFT n_btshft
4231 copy = FALSE;
4232 if (! finfo->info->keep_memory)
4233 copy = TRUE;
4234 hash = TRUE;
4235 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
4236 hash = FALSE;
4238 if (! _bfd_coff_get_external_symbols (input_bfd))
4239 return FALSE;
4241 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4242 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4243 sym_hash = obj_xcoff_sym_hashes (input_bfd);
4244 csectpp = xcoff_data (input_bfd)->csects;
4245 debug_index = xcoff_data (input_bfd)->debug_indices;
4246 isymp = finfo->internal_syms;
4247 indexp = finfo->sym_indices;
4248 output_index = syment_base;
4249 outsym = finfo->outsyms;
4250 incls = 0;
4251 oline = NULL;
4253 while (esym < esym_end)
4256 struct internal_syment isym;
4257 union internal_auxent aux;
4258 int smtyp = 0;
4259 bfd_boolean skip;
4260 bfd_boolean require;
4261 int add;
4263 bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
4265 /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
4266 information. */
4267 if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
4269 BFD_ASSERT (isymp->n_numaux > 0);
4270 bfd_coff_swap_aux_in (input_bfd,
4271 (PTR) (esym + isymesz * isymp->n_numaux),
4272 isymp->n_type, isymp->n_sclass,
4273 isymp->n_numaux - 1, isymp->n_numaux,
4274 (PTR) &aux);
4276 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
4279 /* Make a copy of *isymp so that the relocate_section function
4280 always sees the original values. This is more reliable than
4281 always recomputing the symbol value even if we are stripping
4282 the symbol. */
4283 isym = *isymp;
4285 /* If this symbol is in the .loader section, swap out the
4286 .loader symbol information. If this is an external symbol
4287 reference to a defined symbol, though, then wait until we get
4288 to the definition. */
4289 if (isym.n_sclass == C_EXT
4290 && *sym_hash != NULL
4291 && (*sym_hash)->ldsym != NULL
4292 && (smtyp != XTY_ER
4293 || (*sym_hash)->root.type == bfd_link_hash_undefined))
4295 struct xcoff_link_hash_entry *h;
4296 struct internal_ldsym *ldsym;
4298 h = *sym_hash;
4299 ldsym = h->ldsym;
4300 if (isym.n_scnum > 0)
4302 ldsym->l_scnum = (*csectpp)->output_section->target_index;
4303 ldsym->l_value = (isym.n_value
4304 + (*csectpp)->output_section->vma
4305 + (*csectpp)->output_offset
4306 - (*csectpp)->vma);
4308 else
4310 ldsym->l_scnum = isym.n_scnum;
4311 ldsym->l_value = isym.n_value;
4314 ldsym->l_smtype = smtyp;
4315 if (((h->flags & XCOFF_DEF_REGULAR) == 0
4316 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4317 || (h->flags & XCOFF_IMPORT) != 0)
4318 ldsym->l_smtype |= L_IMPORT;
4319 if (((h->flags & XCOFF_DEF_REGULAR) != 0
4320 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
4321 || (h->flags & XCOFF_EXPORT) != 0)
4322 ldsym->l_smtype |= L_EXPORT;
4323 if ((h->flags & XCOFF_ENTRY) != 0)
4324 ldsym->l_smtype |= L_ENTRY;
4326 ldsym->l_smclas = aux.x_csect.x_smclas;
4328 if (ldsym->l_ifile == (bfd_size_type) -1)
4329 ldsym->l_ifile = 0;
4330 else if (ldsym->l_ifile == 0)
4332 if ((ldsym->l_smtype & L_IMPORT) == 0)
4333 ldsym->l_ifile = 0;
4334 else
4336 bfd *impbfd;
4338 if (h->root.type == bfd_link_hash_defined
4339 || h->root.type == bfd_link_hash_defweak)
4340 impbfd = h->root.u.def.section->owner;
4341 else if (h->root.type == bfd_link_hash_undefined
4342 || h->root.type == bfd_link_hash_undefweak)
4343 impbfd = h->root.u.undef.abfd;
4344 else
4345 impbfd = NULL;
4347 if (impbfd == NULL)
4348 ldsym->l_ifile = 0;
4349 else
4351 BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
4352 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
4357 ldsym->l_parm = 0;
4359 BFD_ASSERT (h->ldindx >= 0);
4360 bfd_xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
4361 (finfo->ldsym
4362 + ((h->ldindx - 3)
4363 * bfd_xcoff_ldsymsz (finfo->output_bfd))));
4364 h->ldsym = NULL;
4366 /* Fill in snentry now that we know the target_index. */
4367 if ((h->flags & XCOFF_ENTRY) != 0
4368 && (h->root.type == bfd_link_hash_defined
4369 || h->root.type == bfd_link_hash_defweak))
4371 xcoff_data (output_bfd)->snentry =
4372 h->root.u.def.section->output_section->target_index;
4376 *indexp = -1;
4378 skip = FALSE;
4379 require = FALSE;
4380 add = 1 + isym.n_numaux;
4382 /* If we are skipping this csect, we want to skip this symbol. */
4383 if (*csectpp == NULL)
4384 skip = TRUE;
4386 /* If we garbage collected this csect, we want to skip this
4387 symbol. */
4388 if (! skip
4389 && xcoff_hash_table (finfo->info)->gc
4390 && ((*csectpp)->flags & SEC_MARK) == 0
4391 && *csectpp != bfd_abs_section_ptr)
4392 skip = TRUE;
4394 /* An XCOFF linker always skips C_STAT symbols. */
4395 if (! skip
4396 && isymp->n_sclass == C_STAT)
4397 skip = TRUE;
4399 /* We skip all but the first TOC anchor. */
4400 if (! skip
4401 && isymp->n_sclass == C_HIDEXT
4402 && aux.x_csect.x_smclas == XMC_TC0)
4404 if (finfo->toc_symindx != -1)
4405 skip = TRUE;
4406 else
4408 bfd_vma tocval, tocend;
4409 bfd *inp;
4411 tocval = ((*csectpp)->output_section->vma
4412 + (*csectpp)->output_offset
4413 + isym.n_value
4414 - (*csectpp)->vma);
4416 /* We want to find out if tocval is a good value to use
4417 as the TOC anchor--that is, whether we can access all
4418 of the TOC using a 16 bit offset from tocval. This
4419 test assumes that the TOC comes at the end of the
4420 output section, as it does in the default linker
4421 script. */
4422 tocend = ((*csectpp)->output_section->vma
4423 + (*csectpp)->output_section->size);
4424 for (inp = finfo->info->input_bfds;
4425 inp != NULL;
4426 inp = inp->link_next)
4429 for (o = inp->sections; o != NULL; o = o->next)
4430 if (strcmp (o->name, ".tocbss") == 0)
4432 bfd_vma new_toc_end;
4433 new_toc_end = (o->output_section->vma
4434 + o->output_offset
4435 + o->size);
4436 if (new_toc_end > tocend)
4437 tocend = new_toc_end;
4442 if (tocval + 0x10000 < tocend)
4444 (*_bfd_error_handler)
4445 (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"),
4446 (unsigned long) (tocend - tocval));
4447 bfd_set_error (bfd_error_file_too_big);
4448 return FALSE;
4451 if (tocval + 0x8000 < tocend)
4453 bfd_vma tocadd;
4455 tocadd = tocend - (tocval + 0x8000);
4456 tocval += tocadd;
4457 isym.n_value += tocadd;
4460 finfo->toc_symindx = output_index;
4461 xcoff_data (finfo->output_bfd)->toc = tocval;
4462 xcoff_data (finfo->output_bfd)->sntoc =
4463 (*csectpp)->output_section->target_index;
4464 require = TRUE;
4469 /* If we are stripping all symbols, we want to skip this one. */
4470 if (! skip
4471 && finfo->info->strip == strip_all)
4472 skip = TRUE;
4474 /* We can skip resolved external references. */
4475 if (! skip
4476 && isym.n_sclass == C_EXT
4477 && smtyp == XTY_ER
4478 && (*sym_hash)->root.type != bfd_link_hash_undefined)
4479 skip = TRUE;
4481 /* We can skip common symbols if they got defined somewhere
4482 else. */
4483 if (! skip
4484 && isym.n_sclass == C_EXT
4485 && smtyp == XTY_CM
4486 && ((*sym_hash)->root.type != bfd_link_hash_common
4487 || (*sym_hash)->root.u.c.p->section != *csectpp)
4488 && ((*sym_hash)->root.type != bfd_link_hash_defined
4489 || (*sym_hash)->root.u.def.section != *csectpp))
4490 skip = TRUE;
4492 /* Skip local symbols if we are discarding them. */
4493 if (! skip
4494 && finfo->info->discard == discard_all
4495 && isym.n_sclass != C_EXT
4496 && (isym.n_sclass != C_HIDEXT
4497 || smtyp != XTY_SD))
4498 skip = TRUE;
4500 /* If we stripping debugging symbols, and this is a debugging
4501 symbol, then skip it. */
4502 if (! skip
4503 && finfo->info->strip == strip_debugger
4504 && isym.n_scnum == N_DEBUG)
4505 skip = TRUE;
4507 /* If some symbols are stripped based on the name, work out the
4508 name and decide whether to skip this symbol. We don't handle
4509 this correctly for symbols whose names are in the .debug
4510 section; to get it right we would need a new bfd_strtab_hash
4511 function to return the string given the index. */
4512 if (! skip
4513 && (finfo->info->strip == strip_some
4514 || finfo->info->discard == discard_l)
4515 && (debug_index == NULL || *debug_index == (unsigned long) -1))
4517 const char *name;
4518 char buf[SYMNMLEN + 1];
4520 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
4522 if (name == NULL)
4523 return FALSE;
4525 if ((finfo->info->strip == strip_some
4526 && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
4527 FALSE) == NULL))
4528 || (finfo->info->discard == discard_l
4529 && (isym.n_sclass != C_EXT
4530 && (isym.n_sclass != C_HIDEXT
4531 || smtyp != XTY_SD))
4532 && bfd_is_local_label_name (input_bfd, name)))
4533 skip = TRUE;
4536 /* We can not skip the first TOC anchor. */
4537 if (skip
4538 && require
4539 && finfo->info->strip != strip_all)
4540 skip = FALSE;
4542 /* We now know whether we are to skip this symbol or not. */
4543 if (! skip)
4545 /* Adjust the symbol in order to output it. */
4547 if (isym._n._n_n._n_zeroes == 0
4548 && isym._n._n_n._n_offset != 0)
4550 /* This symbol has a long name. Enter it in the string
4551 table we are building. If *debug_index != -1, the
4552 name has already been entered in the .debug section. */
4553 if (debug_index != NULL && *debug_index != (unsigned long) -1)
4554 isym._n._n_n._n_offset = *debug_index;
4555 else
4557 const char *name;
4558 bfd_size_type indx;
4560 name = _bfd_coff_internal_syment_name (input_bfd, &isym,
4561 (char *) NULL);
4563 if (name == NULL)
4564 return FALSE;
4565 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
4566 if (indx == (bfd_size_type) -1)
4567 return FALSE;
4568 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
4572 if (isym.n_sclass != C_BSTAT
4573 && isym.n_sclass != C_ESTAT
4574 && isym.n_sclass != C_DECL
4575 && isym.n_scnum > 0)
4577 isym.n_scnum = (*csectpp)->output_section->target_index;
4578 isym.n_value += ((*csectpp)->output_section->vma
4579 + (*csectpp)->output_offset
4580 - (*csectpp)->vma);
4583 /* The value of a C_FILE symbol is the symbol index of the
4584 next C_FILE symbol. The value of the last C_FILE symbol
4585 is -1. We try to get this right, below, just before we
4586 write the symbols out, but in the general case we may
4587 have to write the symbol out twice. */
4588 if (isym.n_sclass == C_FILE)
4590 if (finfo->last_file_index != -1
4591 && finfo->last_file.n_value != (bfd_vma) output_index)
4593 /* We must correct the value of the last C_FILE entry. */
4594 finfo->last_file.n_value = output_index;
4595 if ((bfd_size_type) finfo->last_file_index >= syment_base)
4597 /* The last C_FILE symbol is in this input file. */
4598 bfd_coff_swap_sym_out (output_bfd,
4599 (PTR) &finfo->last_file,
4600 (PTR) (finfo->outsyms
4601 + ((finfo->last_file_index
4602 - syment_base)
4603 * osymesz)));
4605 else
4607 /* We have already written out the last C_FILE
4608 symbol. We need to write it out again. We
4609 borrow *outsym temporarily. */
4610 file_ptr pos;
4612 bfd_coff_swap_sym_out (output_bfd,
4613 (PTR) &finfo->last_file,
4614 (PTR) outsym);
4616 pos = obj_sym_filepos (output_bfd);
4617 pos += finfo->last_file_index * osymesz;
4618 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
4619 || (bfd_bwrite (outsym, osymesz, output_bfd)
4620 != osymesz))
4621 return FALSE;
4625 finfo->last_file_index = output_index;
4626 finfo->last_file = isym;
4629 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4630 into the line numbers. We update the symbol values when
4631 we handle the line numbers. */
4632 if (isym.n_sclass == C_BINCL
4633 || isym.n_sclass == C_EINCL)
4635 isym.n_value = finfo->line_filepos;
4636 ++incls;
4639 /* Output the symbol. */
4641 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
4643 *indexp = output_index;
4645 if (isym.n_sclass == C_EXT)
4647 long indx;
4648 struct xcoff_link_hash_entry *h;
4650 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
4651 / isymesz);
4652 h = obj_xcoff_sym_hashes (input_bfd)[indx];
4653 BFD_ASSERT (h != NULL);
4654 h->indx = output_index;
4657 /* If this is a symbol in the TOC which we may have merged
4658 (class XMC_TC), remember the symbol index of the TOC
4659 symbol. */
4660 if (isym.n_sclass == C_HIDEXT
4661 && aux.x_csect.x_smclas == XMC_TC
4662 && *sym_hash != NULL)
4664 BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
4665 BFD_ASSERT ((*sym_hash)->toc_section != NULL);
4666 (*sym_hash)->u.toc_indx = output_index;
4669 output_index += add;
4670 outsym += add * osymesz;
4673 esym += add * isymesz;
4674 isymp += add;
4675 csectpp += add;
4676 sym_hash += add;
4677 if (debug_index != NULL)
4678 debug_index += add;
4679 ++indexp;
4680 for (--add; add > 0; --add)
4681 *indexp++ = -1;
4684 /* Fix up the aux entries and the C_BSTAT symbols. This must be
4685 done in a separate pass, because we don't know the correct symbol
4686 indices until we have already decided which symbols we are going
4687 to keep. */
4689 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
4690 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
4691 isymp = finfo->internal_syms;
4692 indexp = finfo->sym_indices;
4693 csectpp = xcoff_data (input_bfd)->csects;
4694 outsym = finfo->outsyms;
4695 while (esym < esym_end)
4697 int add;
4699 add = 1 + isymp->n_numaux;
4701 if (*indexp < 0)
4702 esym += add * isymesz;
4703 else
4705 int i;
4707 if (isymp->n_sclass == C_BSTAT)
4709 struct internal_syment isym;
4711 bfd_vma indx;
4713 /* The value of a C_BSTAT symbol is the symbol table
4714 index of the containing csect. */
4715 bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
4716 indx = isym.n_value;
4717 if (indx < obj_raw_syment_count (input_bfd))
4719 long symindx;
4721 symindx = finfo->sym_indices[indx];
4722 if (symindx < 0)
4723 isym.n_value = 0;
4724 else
4725 isym.n_value = symindx;
4726 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
4727 (PTR) outsym);
4731 esym += isymesz;
4732 outsym += osymesz;
4734 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
4736 union internal_auxent aux;
4738 bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
4739 isymp->n_sclass, i, isymp->n_numaux,
4740 (PTR) &aux);
4742 if (isymp->n_sclass == C_FILE)
4744 /* This is the file name (or some comment put in by
4745 the compiler). If it is long, we must put it in
4746 the string table. */
4747 if (aux.x_file.x_n.x_zeroes == 0
4748 && aux.x_file.x_n.x_offset != 0)
4750 const char *filename;
4751 bfd_size_type indx;
4753 BFD_ASSERT (aux.x_file.x_n.x_offset
4754 >= STRING_SIZE_SIZE);
4755 if (strings == NULL)
4757 strings = _bfd_coff_read_string_table (input_bfd);
4758 if (strings == NULL)
4759 return FALSE;
4761 filename = strings + aux.x_file.x_n.x_offset;
4762 indx = _bfd_stringtab_add (finfo->strtab, filename,
4763 hash, copy);
4764 if (indx == (bfd_size_type) -1)
4765 return FALSE;
4766 aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
4769 else if ((isymp->n_sclass == C_EXT
4770 || isymp->n_sclass == C_HIDEXT)
4771 && i + 1 == isymp->n_numaux)
4774 /* We don't support type checking. I don't know if
4775 anybody does. */
4776 aux.x_csect.x_parmhash = 0;
4777 /* I don't think anybody uses these fields, but we'd
4778 better clobber them just in case. */
4779 aux.x_csect.x_stab = 0;
4780 aux.x_csect.x_snstab = 0;
4782 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
4784 unsigned long indx;
4786 indx = aux.x_csect.x_scnlen.l;
4787 if (indx < obj_raw_syment_count (input_bfd))
4789 long symindx;
4791 symindx = finfo->sym_indices[indx];
4792 if (symindx < 0)
4794 aux.x_csect.x_scnlen.l = 0;
4796 else
4798 aux.x_csect.x_scnlen.l = symindx;
4803 else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
4805 unsigned long indx;
4807 if (ISFCN (isymp->n_type)
4808 || ISTAG (isymp->n_sclass)
4809 || isymp->n_sclass == C_BLOCK
4810 || isymp->n_sclass == C_FCN)
4812 indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
4813 if (indx > 0
4814 && indx < obj_raw_syment_count (input_bfd))
4816 /* We look forward through the symbol for
4817 the index of the next symbol we are going
4818 to include. I don't know if this is
4819 entirely right. */
4820 while (finfo->sym_indices[indx] < 0
4821 && indx < obj_raw_syment_count (input_bfd))
4822 ++indx;
4823 if (indx >= obj_raw_syment_count (input_bfd))
4824 indx = output_index;
4825 else
4826 indx = finfo->sym_indices[indx];
4827 aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
4832 indx = aux.x_sym.x_tagndx.l;
4833 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
4835 long symindx;
4837 symindx = finfo->sym_indices[indx];
4838 if (symindx < 0)
4839 aux.x_sym.x_tagndx.l = 0;
4840 else
4841 aux.x_sym.x_tagndx.l = symindx;
4846 /* Copy over the line numbers, unless we are stripping
4847 them. We do this on a symbol by symbol basis in
4848 order to more easily handle garbage collection. */
4849 if ((isymp->n_sclass == C_EXT
4850 || isymp->n_sclass == C_HIDEXT)
4851 && i == 0
4852 && isymp->n_numaux > 1
4853 && ISFCN (isymp->n_type)
4854 && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
4856 if (finfo->info->strip != strip_none
4857 && finfo->info->strip != strip_some)
4858 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4859 else
4861 asection *enclosing;
4862 unsigned int enc_count;
4863 bfd_signed_vma linoff;
4864 struct internal_lineno lin;
4866 o = *csectpp;
4867 enclosing = xcoff_section_data (abfd, o)->enclosing;
4868 enc_count = xcoff_section_data (abfd, o)->lineno_count;
4869 if (oline != enclosing)
4871 file_ptr pos = enclosing->line_filepos;
4872 bfd_size_type amt = linesz * enc_count;
4873 if (bfd_seek (input_bfd, pos, SEEK_SET) != 0
4874 || (bfd_bread (finfo->linenos, amt, input_bfd)
4875 != amt))
4876 return FALSE;
4877 oline = enclosing;
4880 linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
4881 - enclosing->line_filepos);
4883 bfd_coff_swap_lineno_in (input_bfd,
4884 (PTR) (finfo->linenos + linoff),
4885 (PTR) &lin);
4886 if (lin.l_lnno != 0
4887 || ((bfd_size_type) lin.l_addr.l_symndx
4888 != ((esym
4889 - isymesz
4890 - ((bfd_byte *)
4891 obj_coff_external_syms (input_bfd)))
4892 / isymesz)))
4893 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4894 else
4896 bfd_byte *linpend, *linp;
4897 bfd_vma offset;
4898 bfd_size_type count;
4900 lin.l_addr.l_symndx = *indexp;
4901 bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
4902 (PTR) (finfo->linenos
4903 + linoff));
4905 linpend = (finfo->linenos
4906 + enc_count * linesz);
4907 offset = (o->output_section->vma
4908 + o->output_offset
4909 - o->vma);
4910 for (linp = finfo->linenos + linoff + linesz;
4911 linp < linpend;
4912 linp += linesz)
4914 bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
4915 (PTR) &lin);
4916 if (lin.l_lnno == 0)
4917 break;
4918 lin.l_addr.l_paddr += offset;
4919 bfd_coff_swap_lineno_out (output_bfd,
4920 (PTR) &lin,
4921 (PTR) linp);
4924 count = (linp - (finfo->linenos + linoff)) / linesz;
4926 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
4927 (o->output_section->line_filepos
4928 + o->output_section->lineno_count * linesz);
4930 if (bfd_seek (output_bfd,
4931 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
4932 SEEK_SET) != 0
4933 || (bfd_bwrite (finfo->linenos + linoff,
4934 linesz * count, output_bfd)
4935 != linesz * count))
4936 return FALSE;
4938 o->output_section->lineno_count += count;
4940 if (incls > 0)
4942 struct internal_syment *iisp, *iispend;
4943 long *iindp;
4944 bfd_byte *oos;
4945 int iiadd;
4947 /* Update any C_BINCL or C_EINCL symbols
4948 that refer to a line number in the
4949 range we just output. */
4950 iisp = finfo->internal_syms;
4951 iispend = (iisp
4952 + obj_raw_syment_count (input_bfd));
4953 iindp = finfo->sym_indices;
4954 oos = finfo->outsyms;
4955 while (iisp < iispend)
4957 if (*iindp >= 0
4958 && (iisp->n_sclass == C_BINCL
4959 || iisp->n_sclass == C_EINCL)
4960 && ((bfd_size_type) iisp->n_value
4961 >= (bfd_size_type)(enclosing->line_filepos + linoff))
4962 && ((bfd_size_type) iisp->n_value
4963 < (enclosing->line_filepos
4964 + enc_count * linesz)))
4966 struct internal_syment iis;
4968 bfd_coff_swap_sym_in (output_bfd,
4969 (PTR) oos,
4970 (PTR) &iis);
4971 iis.n_value =
4972 (iisp->n_value
4973 - enclosing->line_filepos
4974 - linoff
4975 + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
4976 bfd_coff_swap_sym_out (output_bfd,
4977 (PTR) &iis,
4978 (PTR) oos);
4979 --incls;
4982 iiadd = 1 + iisp->n_numaux;
4983 if (*iindp >= 0)
4984 oos += iiadd * osymesz;
4985 iisp += iiadd;
4986 iindp += iiadd;
4993 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
4994 isymp->n_sclass, i, isymp->n_numaux,
4995 (PTR) outsym);
4996 outsym += osymesz;
4997 esym += isymesz;
5001 indexp += add;
5002 isymp += add;
5003 csectpp += add;
5006 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
5007 symbol will be the first symbol in the next input file. In the
5008 normal case, this will save us from writing out the C_FILE symbol
5009 again. */
5010 if (finfo->last_file_index != -1
5011 && (bfd_size_type) finfo->last_file_index >= syment_base)
5013 finfo->last_file.n_value = output_index;
5014 bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
5015 (PTR) (finfo->outsyms
5016 + ((finfo->last_file_index - syment_base)
5017 * osymesz)));
5020 /* Write the modified symbols to the output file. */
5021 if (outsym > finfo->outsyms)
5023 file_ptr pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
5024 bfd_size_type amt = outsym - finfo->outsyms;
5025 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5026 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5027 return FALSE;
5029 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
5030 + (outsym - finfo->outsyms) / osymesz)
5031 == output_index);
5033 obj_raw_syment_count (output_bfd) = output_index;
5036 /* Don't let the linker relocation routines discard the symbols. */
5037 keep_syms = obj_coff_keep_syms (input_bfd);
5038 obj_coff_keep_syms (input_bfd) = TRUE;
5040 /* Relocate the contents of each section. */
5041 for (o = input_bfd->sections; o != NULL; o = o->next)
5044 bfd_byte *contents;
5046 if (! o->linker_mark)
5048 /* This section was omitted from the link. */
5049 continue;
5052 if ((o->flags & SEC_HAS_CONTENTS) == 0
5053 || o->size == 0
5054 || (o->flags & SEC_IN_MEMORY) != 0)
5055 continue;
5057 /* We have set filepos correctly for the sections we created to
5058 represent csects, so bfd_get_section_contents should work. */
5059 if (coff_section_data (input_bfd, o) != NULL
5060 && coff_section_data (input_bfd, o)->contents != NULL)
5061 contents = coff_section_data (input_bfd, o)->contents;
5062 else
5064 bfd_size_type sz = o->rawsize ? o->rawsize : o->size;
5065 if (!bfd_get_section_contents (input_bfd, o, finfo->contents, 0, sz))
5066 return FALSE;
5067 contents = finfo->contents;
5070 if ((o->flags & SEC_RELOC) != 0)
5072 int target_index;
5073 struct internal_reloc *internal_relocs;
5074 struct internal_reloc *irel;
5075 bfd_vma offset;
5076 struct internal_reloc *irelend;
5077 struct xcoff_link_hash_entry **rel_hash;
5078 long r_symndx;
5080 /* Read in the relocs. */
5081 target_index = o->output_section->target_index;
5082 internal_relocs = (xcoff_read_internal_relocs
5083 (input_bfd, o, FALSE, finfo->external_relocs,
5084 TRUE,
5085 (finfo->section_info[target_index].relocs
5086 + o->output_section->reloc_count)));
5087 if (internal_relocs == NULL)
5088 return FALSE;
5090 /* Call processor specific code to relocate the section
5091 contents. */
5092 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
5093 input_bfd, o,
5094 contents,
5095 internal_relocs,
5096 finfo->internal_syms,
5097 xcoff_data (input_bfd)->csects))
5098 return FALSE;
5100 offset = o->output_section->vma + o->output_offset - o->vma;
5101 irel = internal_relocs;
5102 irelend = irel + o->reloc_count;
5103 rel_hash = (finfo->section_info[target_index].rel_hashes
5104 + o->output_section->reloc_count);
5105 for (; irel < irelend; irel++, rel_hash++)
5107 struct xcoff_link_hash_entry *h = NULL;
5108 struct internal_ldrel ldrel;
5109 bfd_boolean quiet;
5111 *rel_hash = NULL;
5113 /* Adjust the reloc address and symbol index. */
5115 irel->r_vaddr += offset;
5117 r_symndx = irel->r_symndx;
5119 if (r_symndx == -1)
5120 h = NULL;
5121 else
5122 h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
5124 if (r_symndx != -1 && finfo->info->strip != strip_all)
5126 if (h != NULL
5127 && h->smclas != XMC_TD
5128 && (irel->r_type == R_TOC
5129 || irel->r_type == R_GL
5130 || irel->r_type == R_TCL
5131 || irel->r_type == R_TRL
5132 || irel->r_type == R_TRLA))
5134 /* This is a TOC relative reloc with a symbol
5135 attached. The symbol should be the one which
5136 this reloc is for. We want to make this
5137 reloc against the TOC address of the symbol,
5138 not the symbol itself. */
5139 BFD_ASSERT (h->toc_section != NULL);
5140 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
5141 if (h->u.toc_indx != -1)
5142 irel->r_symndx = h->u.toc_indx;
5143 else
5145 struct xcoff_toc_rel_hash *n;
5146 struct xcoff_link_section_info *si;
5147 bfd_size_type amt;
5149 amt = sizeof (struct xcoff_toc_rel_hash);
5150 n = ((struct xcoff_toc_rel_hash *)
5151 bfd_alloc (finfo->output_bfd, amt));
5152 if (n == NULL)
5153 return FALSE;
5154 si = finfo->section_info + target_index;
5155 n->next = si->toc_rel_hashes;
5156 n->h = h;
5157 n->rel = irel;
5158 si->toc_rel_hashes = n;
5161 else if (h != NULL)
5163 /* This is a global symbol. */
5164 if (h->indx >= 0)
5165 irel->r_symndx = h->indx;
5166 else
5168 /* This symbol is being written at the end
5169 of the file, and we do not yet know the
5170 symbol index. We save the pointer to the
5171 hash table entry in the rel_hash list.
5172 We set the indx field to -2 to indicate
5173 that this symbol must not be stripped. */
5174 *rel_hash = h;
5175 h->indx = -2;
5178 else
5180 long indx;
5182 indx = finfo->sym_indices[r_symndx];
5184 if (indx == -1)
5186 struct internal_syment *is;
5188 /* Relocations against a TC0 TOC anchor are
5189 automatically transformed to be against
5190 the TOC anchor in the output file. */
5191 is = finfo->internal_syms + r_symndx;
5192 if (is->n_sclass == C_HIDEXT
5193 && is->n_numaux > 0)
5195 PTR auxptr;
5196 union internal_auxent aux;
5198 auxptr = ((PTR)
5199 (((bfd_byte *)
5200 obj_coff_external_syms (input_bfd))
5201 + ((r_symndx + is->n_numaux)
5202 * isymesz)));
5203 bfd_coff_swap_aux_in (input_bfd, auxptr,
5204 is->n_type, is->n_sclass,
5205 is->n_numaux - 1,
5206 is->n_numaux,
5207 (PTR) &aux);
5208 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
5209 && aux.x_csect.x_smclas == XMC_TC0)
5210 indx = finfo->toc_symindx;
5214 if (indx != -1)
5215 irel->r_symndx = indx;
5216 else
5219 struct internal_syment *is;
5221 const char *name;
5222 char buf[SYMNMLEN + 1];
5224 /* This reloc is against a symbol we are
5225 stripping. It would be possible to handle
5226 this case, but I don't think it's worth it. */
5227 is = finfo->internal_syms + r_symndx;
5229 name = (_bfd_coff_internal_syment_name
5230 (input_bfd, is, buf));
5232 if (name == NULL)
5233 return FALSE;
5235 if (! ((*finfo->info->callbacks->unattached_reloc)
5236 (finfo->info, name, input_bfd, o,
5237 irel->r_vaddr)))
5238 return FALSE;
5243 quiet = FALSE;
5244 switch (irel->r_type)
5246 default:
5247 if (h == NULL
5248 || h->root.type == bfd_link_hash_defined
5249 || h->root.type == bfd_link_hash_defweak
5250 || h->root.type == bfd_link_hash_common)
5251 break;
5252 /* Fall through. */
5253 case R_POS:
5254 case R_NEG:
5255 case R_RL:
5256 case R_RLA:
5257 /* This reloc needs to be copied into the .loader
5258 section. */
5259 ldrel.l_vaddr = irel->r_vaddr;
5260 if (r_symndx == -1)
5261 ldrel.l_symndx = -(bfd_size_type ) 1;
5262 else if (h == NULL
5263 || (h->root.type == bfd_link_hash_defined
5264 || h->root.type == bfd_link_hash_defweak
5265 || h->root.type == bfd_link_hash_common))
5267 asection *sec;
5269 if (h == NULL)
5270 sec = xcoff_data (input_bfd)->csects[r_symndx];
5271 else if (h->root.type == bfd_link_hash_common)
5272 sec = h->root.u.c.p->section;
5273 else
5274 sec = h->root.u.def.section;
5275 sec = sec->output_section;
5277 if (strcmp (sec->name, ".text") == 0)
5278 ldrel.l_symndx = 0;
5279 else if (strcmp (sec->name, ".data") == 0)
5280 ldrel.l_symndx = 1;
5281 else if (strcmp (sec->name, ".bss") == 0)
5282 ldrel.l_symndx = 2;
5283 else
5285 (*_bfd_error_handler)
5286 (_("%s: loader reloc in unrecognized section `%s'"),
5287 bfd_archive_filename (input_bfd),
5288 sec->name);
5289 bfd_set_error (bfd_error_nonrepresentable_section);
5290 return FALSE;
5293 else
5295 if (! finfo->info->relocatable
5296 && (h->flags & XCOFF_DEF_DYNAMIC) == 0
5297 && (h->flags & XCOFF_IMPORT) == 0)
5299 /* We already called the undefined_symbol
5300 callback for this relocation, in
5301 _bfd_ppc_xcoff_relocate_section. Don't
5302 issue any more warnings. */
5303 quiet = TRUE;
5305 if (h->ldindx < 0 && ! quiet)
5307 (*_bfd_error_handler)
5308 (_("%s: `%s' in loader reloc but not loader sym"),
5309 bfd_archive_filename (input_bfd),
5310 h->root.root.string);
5311 bfd_set_error (bfd_error_bad_value);
5312 return FALSE;
5314 ldrel.l_symndx = h->ldindx;
5316 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
5317 ldrel.l_rsecnm = o->output_section->target_index;
5318 if (xcoff_hash_table (finfo->info)->textro
5319 && strcmp (o->output_section->name, ".text") == 0
5320 && ! quiet)
5322 (*_bfd_error_handler)
5323 (_("%s: loader reloc in read-only section %s"),
5324 bfd_archive_filename (input_bfd),
5325 bfd_get_section_name (finfo->output_bfd,
5326 o->output_section));
5327 bfd_set_error (bfd_error_invalid_operation);
5328 return FALSE;
5330 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel,
5331 finfo->ldrel);
5333 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5334 break;
5336 case R_TOC:
5337 case R_GL:
5338 case R_TCL:
5339 case R_TRL:
5340 case R_TRLA:
5341 /* We should never need a .loader reloc for a TOC
5342 relative reloc. */
5343 break;
5347 o->output_section->reloc_count += o->reloc_count;
5350 /* Write out the modified section contents. */
5351 if (! bfd_set_section_contents (output_bfd, o->output_section,
5352 contents, (file_ptr) o->output_offset,
5353 o->size))
5354 return FALSE;
5357 obj_coff_keep_syms (input_bfd) = keep_syms;
5359 if (! finfo->info->keep_memory)
5361 if (! _bfd_coff_free_symbols (input_bfd))
5362 return FALSE;
5365 return TRUE;
5368 #undef N_TMASK
5369 #undef N_BTSHFT
5371 /* Write out a non-XCOFF global symbol. */
5374 static bfd_boolean
5375 xcoff_write_global_symbol (h, inf)
5376 struct xcoff_link_hash_entry *h;
5377 PTR inf;
5379 struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) inf;
5380 bfd *output_bfd;
5381 bfd_byte *outsym;
5382 struct internal_syment isym;
5383 union internal_auxent aux;
5384 bfd_boolean result;
5385 file_ptr pos;
5386 bfd_size_type amt;
5388 output_bfd = finfo->output_bfd;
5389 outsym = finfo->outsyms;
5391 if (h->root.type == bfd_link_hash_warning)
5393 h = (struct xcoff_link_hash_entry *) h->root.u.i.link;
5394 if (h->root.type == bfd_link_hash_new)
5395 return TRUE;
5398 /* If this symbol was garbage collected, just skip it. */
5399 if (xcoff_hash_table (finfo->info)->gc
5400 && (h->flags & XCOFF_MARK) == 0)
5401 return TRUE;
5403 /* If we need a .loader section entry, write it out. */
5404 if (h->ldsym != NULL)
5406 struct internal_ldsym *ldsym;
5407 bfd *impbfd;
5409 ldsym = h->ldsym;
5411 if (h->root.type == bfd_link_hash_undefined
5412 || h->root.type == bfd_link_hash_undefweak)
5415 ldsym->l_value = 0;
5416 ldsym->l_scnum = N_UNDEF;
5417 ldsym->l_smtype = XTY_ER;
5418 impbfd = h->root.u.undef.abfd;
5421 else if (h->root.type == bfd_link_hash_defined
5422 || h->root.type == bfd_link_hash_defweak)
5425 asection *sec;
5427 sec = h->root.u.def.section;
5428 ldsym->l_value = (sec->output_section->vma
5429 + sec->output_offset
5430 + h->root.u.def.value);
5431 ldsym->l_scnum = sec->output_section->target_index;
5432 ldsym->l_smtype = XTY_SD;
5433 impbfd = sec->owner;
5436 else
5437 abort ();
5439 if (((h->flags & XCOFF_DEF_REGULAR) == 0
5440 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5441 || (h->flags & XCOFF_IMPORT) != 0)
5443 /* Clear l_smtype
5444 Import symbols are defined so the check above will make
5445 the l_smtype XTY_SD. But this is not correct, it should
5446 be cleared. */
5447 ldsym->l_smtype |= L_IMPORT;
5450 if (((h->flags & XCOFF_DEF_REGULAR) != 0
5451 && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
5452 || (h->flags & XCOFF_EXPORT) != 0)
5454 ldsym->l_smtype |= L_EXPORT;
5457 if ((h->flags & XCOFF_ENTRY) != 0)
5459 ldsym->l_smtype |= L_ENTRY;
5462 if ((h->flags & XCOFF_RTINIT) != 0)
5464 ldsym->l_smtype = XTY_SD;
5467 ldsym->l_smclas = h->smclas;
5469 if (ldsym->l_smtype & L_IMPORT)
5471 if ((h->root.type == bfd_link_hash_defined
5472 || h->root.type == bfd_link_hash_defweak)
5473 && (h->root.u.def.value != 0))
5475 ldsym->l_smclas = XMC_XO;
5477 else if ((h->flags & (XCOFF_SYSCALL32 | XCOFF_SYSCALL64)) ==
5478 (XCOFF_SYSCALL32 | XCOFF_SYSCALL64))
5480 ldsym->l_smclas = XMC_SV3264;
5482 else if (h->flags & XCOFF_SYSCALL32)
5484 ldsym->l_smclas = XMC_SV;
5486 else if (h->flags & XCOFF_SYSCALL64)
5488 ldsym->l_smclas = XMC_SV64;
5492 if (ldsym->l_ifile == -(bfd_size_type) 1)
5494 ldsym->l_ifile = 0;
5496 else if (ldsym->l_ifile == 0)
5498 if ((ldsym->l_smtype & L_IMPORT) == 0)
5500 ldsym->l_ifile = 0;
5502 else if (impbfd == NULL)
5504 ldsym->l_ifile = 0;
5506 else
5508 BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
5509 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
5513 ldsym->l_parm = 0;
5515 BFD_ASSERT (h->ldindx >= 0);
5517 bfd_xcoff_swap_ldsym_out (output_bfd, ldsym,
5518 (finfo->ldsym +
5519 (h->ldindx - 3)
5520 * bfd_xcoff_ldsymsz(finfo->output_bfd)));
5521 h->ldsym = NULL;
5524 /* If this symbol needs global linkage code, write it out. */
5525 if (h->root.type == bfd_link_hash_defined
5526 && (h->root.u.def.section
5527 == xcoff_hash_table (finfo->info)->linkage_section))
5529 bfd_byte *p;
5530 bfd_vma tocoff;
5531 unsigned int i;
5533 p = h->root.u.def.section->contents + h->root.u.def.value;
5535 /* The first instruction in the global linkage code loads a
5536 specific TOC element. */
5537 tocoff = (h->descriptor->toc_section->output_section->vma
5538 + h->descriptor->toc_section->output_offset
5539 - xcoff_data (output_bfd)->toc);
5541 if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
5543 tocoff += h->descriptor->u.toc_offset;
5547 /* The first instruction in the glink code needs to be
5548 cooked to to hold the correct offset in the toc. The
5549 rest are just output raw. */
5550 bfd_put_32 (output_bfd,
5551 bfd_xcoff_glink_code(output_bfd, 0) | (tocoff & 0xffff), p);
5553 /* Start with i == 1 to get past the first instruction done above
5554 The /4 is because the glink code is in bytes and we are going
5555 4 at a pop. */
5556 for (i = 1; i < bfd_xcoff_glink_code_size(output_bfd) / 4; i++)
5558 bfd_put_32 (output_bfd,
5559 (bfd_vma) bfd_xcoff_glink_code(output_bfd, i),
5560 &p[4 * i]);
5564 /* If we created a TOC entry for this symbol, write out the required
5565 relocs. */
5566 if ((h->flags & XCOFF_SET_TOC) != 0)
5568 asection *tocsec;
5569 asection *osec;
5570 int oindx;
5571 struct internal_reloc *irel;
5572 struct internal_ldrel ldrel;
5573 struct internal_syment irsym;
5574 union internal_auxent iraux;
5576 tocsec = h->toc_section;
5577 osec = tocsec->output_section;
5578 oindx = osec->target_index;
5579 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5580 irel->r_vaddr = (osec->vma
5581 + tocsec->output_offset
5582 + h->u.toc_offset);
5585 if (h->indx >= 0)
5587 irel->r_symndx = h->indx;
5589 else
5591 h->indx = -2;
5592 irel->r_symndx = obj_raw_syment_count (output_bfd);
5595 BFD_ASSERT (h->ldindx >= 0);
5597 /* Initialize the aux union here instead of closer to when it is
5598 written out below because the length of the csect depends on
5599 whether the output is 32 or 64 bit. */
5600 memset (&iraux, 0, sizeof iraux);
5601 iraux.x_csect.x_smtyp = XTY_SD;
5602 /* iraux.x_csect.x_scnlen.l = 4 or 8, see below */
5603 iraux.x_csect.x_smclas = XMC_TC;
5605 /* 32 bit uses a 32 bit R_POS to do the relocations
5606 64 bit uses a 64 bit R_POS to do the relocations
5608 Also needs to change the csect size : 4 for 32 bit, 8 for 64 bit
5610 Which one is determined by the backend. */
5611 if (bfd_xcoff_is_xcoff64 (output_bfd))
5613 irel->r_size = 63;
5614 iraux.x_csect.x_scnlen.l = 8;
5616 else if (bfd_xcoff_is_xcoff32 (output_bfd))
5618 irel->r_size = 31;
5619 iraux.x_csect.x_scnlen.l = 4;
5621 else
5623 return FALSE;
5625 irel->r_type = R_POS;
5626 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5627 ++osec->reloc_count;
5629 ldrel.l_vaddr = irel->r_vaddr;
5630 ldrel.l_symndx = h->ldindx;
5631 ldrel.l_rtype = (irel->r_size << 8) | R_POS;
5632 ldrel.l_rsecnm = oindx;
5633 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5634 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5636 /* We need to emit a symbol to define a csect which holds
5637 the reloc. */
5638 if (finfo->info->strip != strip_all)
5641 result = bfd_xcoff_put_symbol_name (output_bfd, finfo->strtab,
5642 &irsym, h->root.root.string);
5643 if (!result)
5644 return FALSE;
5646 irsym.n_value = irel->r_vaddr;
5647 irsym.n_scnum = osec->target_index;
5648 irsym.n_sclass = C_HIDEXT;
5649 irsym.n_type = T_NULL;
5650 irsym.n_numaux = 1;
5652 bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym);
5653 outsym += bfd_coff_symesz (output_bfd);
5655 /* note : iraux is initialized above */
5656 bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT,
5657 0, 1, (PTR) outsym);
5658 outsym += bfd_coff_auxesz (output_bfd);
5660 if (h->indx >= 0)
5662 /* We aren't going to write out the symbols below, so we
5663 need to write them out now. */
5664 pos = obj_sym_filepos (output_bfd);
5665 pos += (obj_raw_syment_count (output_bfd)
5666 * bfd_coff_symesz (output_bfd));
5667 amt = outsym - finfo->outsyms;
5668 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5669 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5670 return FALSE;
5671 obj_raw_syment_count (output_bfd) +=
5672 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
5674 outsym = finfo->outsyms;
5679 /* If this symbol is a specially defined function descriptor, write
5680 it out. The first word is the address of the function code
5681 itself, the second word is the address of the TOC, and the third
5682 word is zero.
5684 32 bit vs 64 bit
5685 The addresses for the 32 bit will take 4 bytes and the addresses
5686 for 64 bit will take 8 bytes. Similar for the relocs. This type
5687 of logic was also done above to create a TOC entry in
5688 xcoff_write_global_symbol. */
5689 if ((h->flags & XCOFF_DESCRIPTOR) != 0
5690 && h->root.type == bfd_link_hash_defined
5691 && (h->root.u.def.section
5692 == xcoff_hash_table (finfo->info)->descriptor_section))
5694 asection *sec;
5695 asection *osec;
5696 int oindx;
5697 bfd_byte *p;
5698 struct xcoff_link_hash_entry *hentry;
5699 asection *esec;
5700 struct internal_reloc *irel;
5701 struct internal_ldrel ldrel;
5702 asection *tsec;
5703 unsigned int reloc_size, byte_size;
5705 if (bfd_xcoff_is_xcoff64 (output_bfd))
5707 reloc_size = 63;
5708 byte_size = 8;
5710 else if (bfd_xcoff_is_xcoff32 (output_bfd))
5712 reloc_size = 31;
5713 byte_size = 4;
5715 else
5717 return FALSE;
5720 sec = h->root.u.def.section;
5721 osec = sec->output_section;
5722 oindx = osec->target_index;
5723 p = sec->contents + h->root.u.def.value;
5725 hentry = h->descriptor;
5726 BFD_ASSERT (hentry != NULL
5727 && (hentry->root.type == bfd_link_hash_defined
5728 || hentry->root.type == bfd_link_hash_defweak));
5729 esec = hentry->root.u.def.section;
5731 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
5732 irel->r_vaddr = (osec->vma
5733 + sec->output_offset
5734 + h->root.u.def.value);
5735 irel->r_symndx = esec->output_section->target_index;
5736 irel->r_type = R_POS;
5737 irel->r_size = reloc_size;
5738 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5739 ++osec->reloc_count;
5741 ldrel.l_vaddr = irel->r_vaddr;
5742 if (strcmp (esec->output_section->name, ".text") == 0)
5743 ldrel.l_symndx = 0;
5744 else if (strcmp (esec->output_section->name, ".data") == 0)
5745 ldrel.l_symndx = 1;
5746 else if (strcmp (esec->output_section->name, ".bss") == 0)
5747 ldrel.l_symndx = 2;
5748 else
5750 (*_bfd_error_handler)
5751 (_("%s: loader reloc in unrecognized section `%s'"),
5752 bfd_get_filename (output_bfd),
5753 esec->output_section->name);
5754 bfd_set_error (bfd_error_nonrepresentable_section);
5755 return FALSE;
5757 ldrel.l_rtype = (reloc_size << 8) | R_POS;
5758 ldrel.l_rsecnm = oindx;
5759 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5760 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5762 /* There are three items to write out,
5763 the address of the code
5764 the address of the toc anchor
5765 the environment pointer.
5766 We are ignoring the environment pointer. So set it to zero. */
5767 if (bfd_xcoff_is_xcoff64 (output_bfd))
5769 bfd_put_64 (output_bfd,
5770 (esec->output_section->vma + esec->output_offset
5771 + hentry->root.u.def.value),
5773 bfd_put_64 (output_bfd, xcoff_data (output_bfd)->toc, p + 8);
5774 bfd_put_64 (output_bfd, (bfd_vma) 0, p + 16);
5776 else
5778 /* 32 bit backend
5779 This logic was already called above so the error case where
5780 the backend is neither has already been checked. */
5781 bfd_put_32 (output_bfd,
5782 (esec->output_section->vma + esec->output_offset
5783 + hentry->root.u.def.value),
5785 bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
5786 bfd_put_32 (output_bfd, (bfd_vma) 0, p + 8);
5789 tsec = coff_section_from_bfd_index (output_bfd,
5790 xcoff_data (output_bfd)->sntoc);
5792 ++irel;
5793 irel->r_vaddr = (osec->vma
5794 + sec->output_offset
5795 + h->root.u.def.value
5796 + byte_size);
5797 irel->r_symndx = tsec->output_section->target_index;
5798 irel->r_type = R_POS;
5799 irel->r_size = reloc_size;
5800 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
5801 ++osec->reloc_count;
5803 ldrel.l_vaddr = irel->r_vaddr;
5804 if (strcmp (tsec->output_section->name, ".text") == 0)
5805 ldrel.l_symndx = 0;
5806 else if (strcmp (tsec->output_section->name, ".data") == 0)
5807 ldrel.l_symndx = 1;
5808 else if (strcmp (tsec->output_section->name, ".bss") == 0)
5809 ldrel.l_symndx = 2;
5810 else
5812 (*_bfd_error_handler)
5813 (_("%s: loader reloc in unrecognized section `%s'"),
5814 bfd_get_filename (output_bfd),
5815 tsec->output_section->name);
5816 bfd_set_error (bfd_error_nonrepresentable_section);
5817 return FALSE;
5819 ldrel.l_rtype = (reloc_size << 8) | R_POS;
5820 ldrel.l_rsecnm = oindx;
5821 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
5822 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
5825 if (h->indx >= 0 || finfo->info->strip == strip_all)
5827 BFD_ASSERT (outsym == finfo->outsyms);
5828 return TRUE;
5831 if (h->indx != -2
5832 && (finfo->info->strip == strip_all
5833 || (finfo->info->strip == strip_some
5834 && bfd_hash_lookup (finfo->info->keep_hash, h->root.root.string,
5835 FALSE, FALSE) == NULL)))
5837 BFD_ASSERT (outsym == finfo->outsyms);
5838 return TRUE;
5841 if (h->indx != -2
5842 && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
5844 BFD_ASSERT (outsym == finfo->outsyms);
5845 return TRUE;
5848 memset (&aux, 0, sizeof aux);
5850 h->indx = obj_raw_syment_count (output_bfd);
5852 result = bfd_xcoff_put_symbol_name (output_bfd, finfo->strtab, &isym,
5853 h->root.root.string);
5854 if (!result)
5855 return FALSE;
5857 if (h->root.type == bfd_link_hash_undefined
5858 || h->root.type == bfd_link_hash_undefweak)
5860 isym.n_value = 0;
5861 isym.n_scnum = N_UNDEF;
5862 isym.n_sclass = C_EXT;
5863 aux.x_csect.x_smtyp = XTY_ER;
5865 else if ((h->root.type == bfd_link_hash_defined
5866 || h->root.type == bfd_link_hash_defweak)
5867 && h->smclas == XMC_XO)
5869 BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section));
5870 isym.n_value = h->root.u.def.value;
5871 isym.n_scnum = N_UNDEF;
5872 isym.n_sclass = C_EXT;
5873 aux.x_csect.x_smtyp = XTY_ER;
5875 else if (h->root.type == bfd_link_hash_defined
5876 || h->root.type == bfd_link_hash_defweak)
5878 struct xcoff_link_size_list *l;
5880 isym.n_value = (h->root.u.def.section->output_section->vma
5881 + h->root.u.def.section->output_offset
5882 + h->root.u.def.value);
5883 if (bfd_is_abs_section (h->root.u.def.section->output_section))
5884 isym.n_scnum = N_ABS;
5885 else
5886 isym.n_scnum = h->root.u.def.section->output_section->target_index;
5887 isym.n_sclass = C_HIDEXT;
5888 aux.x_csect.x_smtyp = XTY_SD;
5890 if ((h->flags & XCOFF_HAS_SIZE) != 0)
5892 for (l = xcoff_hash_table (finfo->info)->size_list;
5893 l != NULL;
5894 l = l->next)
5896 if (l->h == h)
5898 aux.x_csect.x_scnlen.l = l->size;
5899 break;
5904 else if (h->root.type == bfd_link_hash_common)
5906 isym.n_value = (h->root.u.c.p->section->output_section->vma
5907 + h->root.u.c.p->section->output_offset);
5908 isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
5909 isym.n_sclass = C_EXT;
5910 aux.x_csect.x_smtyp = XTY_CM;
5911 aux.x_csect.x_scnlen.l = h->root.u.c.size;
5913 else
5914 abort ();
5916 isym.n_type = T_NULL;
5917 isym.n_numaux = 1;
5919 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5920 outsym += bfd_coff_symesz (output_bfd);
5922 aux.x_csect.x_smclas = h->smclas;
5923 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
5924 (PTR) outsym);
5925 outsym += bfd_coff_auxesz (output_bfd);
5927 if ((h->root.type == bfd_link_hash_defined
5928 || h->root.type == bfd_link_hash_defweak)
5929 && h->smclas != XMC_XO)
5931 /* We just output an SD symbol. Now output an LD symbol. */
5933 h->indx += 2;
5935 isym.n_sclass = C_EXT;
5936 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
5937 outsym += bfd_coff_symesz (output_bfd);
5939 aux.x_csect.x_smtyp = XTY_LD;
5940 aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
5941 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
5942 (PTR) outsym);
5943 outsym += bfd_coff_auxesz (output_bfd);
5946 pos = obj_sym_filepos (output_bfd);
5947 pos += obj_raw_syment_count (output_bfd) * bfd_coff_symesz (output_bfd);
5948 amt = outsym - finfo->outsyms;
5949 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
5950 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
5951 return FALSE;
5952 obj_raw_syment_count (output_bfd) +=
5953 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
5955 return TRUE;
5958 /* Handle a link order which is supposed to generate a reloc. */
5960 static bfd_boolean
5961 xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
5962 bfd *output_bfd;
5963 struct xcoff_final_link_info *finfo;
5964 asection *output_section;
5965 struct bfd_link_order *link_order;
5967 reloc_howto_type *howto;
5968 struct xcoff_link_hash_entry *h;
5969 asection *hsec;
5970 bfd_vma hval;
5971 bfd_vma addend;
5972 struct internal_reloc *irel;
5973 struct xcoff_link_hash_entry **rel_hash_ptr;
5974 struct internal_ldrel ldrel;
5976 if (link_order->type == bfd_section_reloc_link_order)
5978 /* We need to somehow locate a symbol in the right section. The
5979 symbol must either have a value of zero, or we must adjust
5980 the addend by the value of the symbol. FIXME: Write this
5981 when we need it. The old linker couldn't handle this anyhow. */
5982 abort ();
5985 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
5986 if (howto == NULL)
5988 bfd_set_error (bfd_error_bad_value);
5989 return FALSE;
5992 h = ((struct xcoff_link_hash_entry *)
5993 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
5994 link_order->u.reloc.p->u.name,
5995 FALSE, FALSE, TRUE));
5996 if (h == NULL)
5998 if (! ((*finfo->info->callbacks->unattached_reloc)
5999 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
6000 (asection *) NULL, (bfd_vma) 0)))
6001 return FALSE;
6002 return TRUE;
6005 if (h->root.type == bfd_link_hash_common)
6007 hsec = h->root.u.c.p->section;
6008 hval = 0;
6010 else if (h->root.type == bfd_link_hash_defined
6011 || h->root.type == bfd_link_hash_defweak)
6013 hsec = h->root.u.def.section;
6014 hval = h->root.u.def.value;
6016 else
6018 hsec = NULL;
6019 hval = 0;
6022 addend = link_order->u.reloc.p->addend;
6023 if (hsec != NULL)
6024 addend += (hsec->output_section->vma
6025 + hsec->output_offset
6026 + hval);
6028 if (addend != 0)
6030 bfd_size_type size;
6031 bfd_byte *buf;
6032 bfd_reloc_status_type rstat;
6033 bfd_boolean ok;
6035 size = bfd_get_reloc_size (howto);
6036 buf = (bfd_byte *) bfd_zmalloc (size);
6037 if (buf == NULL)
6038 return FALSE;
6040 rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
6041 switch (rstat)
6043 case bfd_reloc_ok:
6044 break;
6045 default:
6046 case bfd_reloc_outofrange:
6047 abort ();
6048 case bfd_reloc_overflow:
6049 if (! ((*finfo->info->callbacks->reloc_overflow)
6050 (finfo->info, link_order->u.reloc.p->u.name,
6051 howto->name, addend, (bfd *) NULL, (asection *) NULL,
6052 (bfd_vma) 0)))
6054 free (buf);
6055 return FALSE;
6057 break;
6059 ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
6060 (file_ptr) link_order->offset, size);
6061 free (buf);
6062 if (! ok)
6063 return FALSE;
6066 /* Store the reloc information in the right place. It will get
6067 swapped and written out at the end of the final_link routine. */
6069 irel = (finfo->section_info[output_section->target_index].relocs
6070 + output_section->reloc_count);
6071 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
6072 + output_section->reloc_count);
6074 memset (irel, 0, sizeof (struct internal_reloc));
6075 *rel_hash_ptr = NULL;
6077 irel->r_vaddr = output_section->vma + link_order->offset;
6079 if (h->indx >= 0)
6080 irel->r_symndx = h->indx;
6081 else
6083 /* Set the index to -2 to force this symbol to get written out. */
6084 h->indx = -2;
6085 *rel_hash_ptr = h;
6086 irel->r_symndx = 0;
6089 irel->r_type = howto->type;
6090 irel->r_size = howto->bitsize - 1;
6091 if (howto->complain_on_overflow == complain_overflow_signed)
6092 irel->r_size |= 0x80;
6094 ++output_section->reloc_count;
6096 /* Now output the reloc to the .loader section. */
6098 ldrel.l_vaddr = irel->r_vaddr;
6100 if (hsec != NULL)
6102 const char *secname;
6104 secname = hsec->output_section->name;
6106 if (strcmp (secname, ".text") == 0)
6107 ldrel.l_symndx = 0;
6108 else if (strcmp (secname, ".data") == 0)
6109 ldrel.l_symndx = 1;
6110 else if (strcmp (secname, ".bss") == 0)
6111 ldrel.l_symndx = 2;
6112 else
6114 (*_bfd_error_handler)
6115 (_("%s: loader reloc in unrecognized section `%s'"),
6116 bfd_get_filename (output_bfd), secname);
6117 bfd_set_error (bfd_error_nonrepresentable_section);
6118 return FALSE;
6121 else
6123 if (h->ldindx < 0)
6125 (*_bfd_error_handler)
6126 (_("%s: `%s' in loader reloc but not loader sym"),
6127 bfd_get_filename (output_bfd),
6128 h->root.root.string);
6129 bfd_set_error (bfd_error_bad_value);
6130 return FALSE;
6132 ldrel.l_symndx = h->ldindx;
6135 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
6136 ldrel.l_rsecnm = output_section->target_index;
6137 bfd_xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
6138 finfo->ldrel += bfd_xcoff_ldrelsz(output_bfd);
6140 return TRUE;
6143 /* Sort relocs by VMA. This is called via qsort. */
6145 static int
6146 xcoff_sort_relocs (p1, p2)
6147 const PTR p1;
6148 const PTR p2;
6150 const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
6151 const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
6153 if (r1->r_vaddr > r2->r_vaddr)
6154 return 1;
6155 else if (r1->r_vaddr < r2->r_vaddr)
6156 return -1;
6157 else
6158 return 0;