1 /* POWER/PowerPC XCOFF linker support.
2 Copyright 1995 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "coff/internal.h"
28 /* This file holds the XCOFF linker code. */
30 #define STRING_SIZE_SIZE (4)
32 /* Get the XCOFF hash table entries for a BFD. */
33 #define obj_xcoff_sym_hashes(bfd) \
34 ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
36 /* XCOFF relocation types. These probably belong in a header file
37 somewhere. The relocations are described in the function
38 _bfd_ppc_xcoff_relocate_section in this file. */
54 #define R_RRTBI (0x14)
55 #define R_RRTBA (0x15)
63 /* The first word of global linkage code. This must be modified by
64 filling in the correct TOC offset. */
66 #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
68 /* The remaining words of global linkage code. */
70 static unsigned long xcoff_glink_code[] =
72 0x90410014, /* stw r2,20(r1) */
73 0x800c0000, /* lwz r0,0(r12) */
74 0x804c0004, /* lwz r2,4(r12) */
75 0x7c0903a6, /* mtctr r0 */
76 0x4e800420, /* bctr */
77 0x0, /* start of traceback table */
78 0x000c8000, /* traceback table */
79 0x0 /* traceback table */
82 #define XCOFF_GLINK_SIZE \
83 (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
85 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
86 This flag will only be used on input sections. */
88 #define SEC_MARK (SEC_ROM)
90 /* The ldhdr structure. This appears at the start of the .loader
95 /* The version number: currently always 1. */
96 unsigned long l_version;
97 /* The number of symbol table entries. */
98 bfd_size_type l_nsyms;
99 /* The number of relocation table entries. */
100 bfd_size_type l_nreloc;
101 /* The length of the import file string table. */
102 bfd_size_type l_istlen;
103 /* The number of import files. */
104 bfd_size_type l_nimpid;
105 /* The offset from the start of the .loader section to the first
106 entry in the import file table. */
107 bfd_size_type l_impoff;
108 /* The length of the string table. */
109 bfd_size_type l_stlen;
110 /* The offset from the start of the .loader section to the first
111 entry in the string table. */
112 bfd_size_type l_stoff;
115 struct external_ldhdr
117 bfd_byte l_version[4];
119 bfd_byte l_nreloc[4];
120 bfd_byte l_istlen[4];
121 bfd_byte l_nimpid[4];
122 bfd_byte l_impoff[4];
127 #define LDHDRSZ (8 * 4)
129 /* The ldsym structure. This is used to represent a symbol in the
132 struct internal_ldsym
136 /* The symbol name if <= SYMNMLEN characters. */
137 char _l_name[SYMNMLEN];
140 /* Zero if the symbol name is more than SYMNMLEN characters. */
142 /* The offset in the string table if the symbol name is more
143 than SYMNMLEN characters. */
147 /* The symbol value. */
149 /* The symbol section number. */
151 /* The symbol type and flags. */
153 /* The symbol storage class. */
155 /* The import file ID. */
156 bfd_size_type l_ifile;
157 /* Offset to the parameter type check string. */
158 bfd_size_type l_parm;
161 struct external_ldsym
165 bfd_byte _l_name[SYMNMLEN];
168 bfd_byte _l_zeroes[4];
169 bfd_byte _l_offset[4];
174 bfd_byte l_smtype[1];
175 bfd_byte l_smclas[1];
180 #define LDSYMSZ (8 + 3 * 4 + 2 + 2)
182 /* These flags are for the l_smtype field (the lower three bits are an
185 /* Imported symbol. */
186 #define L_IMPORT (0x40)
188 #define L_ENTRY (0x20)
189 /* Exported symbol. */
190 #define L_EXPORT (0x10)
192 /* The ldrel structure. This is used to represent a reloc in the
195 struct internal_ldrel
197 /* The reloc address. */
199 /* The symbol table index in the .loader section symbol table. */
200 bfd_size_type l_symndx;
201 /* The relocation type and size. */
203 /* The section number this relocation applies to. */
207 struct external_ldrel
210 bfd_byte l_symndx[4];
212 bfd_byte l_rsecnm[2];
215 #define LDRELSZ (2 * 4 + 2 * 2)
217 /* The list of import files. */
219 struct xcoff_import_file
221 /* The next entry in the list. */
222 struct xcoff_import_file *next;
227 /* The member name. */
231 /* An entry in the XCOFF linker hash table. */
233 struct xcoff_link_hash_entry
235 struct bfd_link_hash_entry root;
237 /* Symbol index in output file. Set to -1 initially. Set to -2 if
238 there is a reloc against this symbol. */
241 /* If we have created a TOC entry for this symbol, this is the .tc
242 section which holds it. */
243 asection *toc_section;
247 /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
248 set), this is the offset in toc_section. */
250 /* If the TOC entry comes from an input file, this is set to the
251 symbo lindex of the C_HIDEXT XMC_TC symbol. */
255 /* If this symbol is a function entry point which is called, this
256 field holds a pointer to the function descriptor. */
257 struct xcoff_link_hash_entry *descriptor;
259 /* The .loader symbol table entry, if there is one. */
260 struct internal_ldsym *ldsym;
262 /* The .loader symbol table index. */
265 /* Some linker flags. */
266 unsigned short flags;
267 /* Symbol is referenced by a regular object. */
268 #define XCOFF_REF_REGULAR (01)
269 /* Symbol is defined by a regular object. */
270 #define XCOFF_DEF_REGULAR (02)
271 /* Symbol is referenced by a dynamic object. */
272 #define XCOFF_REF_DYNAMIC (04)
273 /* Symbol is used in a reloc being copied into the .loader section. */
274 #define XCOFF_LDREL (010)
275 /* Symbol is the entry point. */
276 #define XCOFF_ENTRY (020)
277 /* Symbol is called; this is, it appears in a R_BR reloc. */
278 #define XCOFF_CALLED (040)
279 /* Symbol needs the TOC entry filled in. */
280 #define XCOFF_SET_TOC (0100)
281 /* Symbol is explicitly imported. */
282 #define XCOFF_IMPORT (0200)
283 /* Symbol is explicitly exported. */
284 #define XCOFF_EXPORT (0400)
285 /* Symbol has been processed by xcoff_build_ldsyms. */
286 #define XCOFF_BUILT_LDSYM (01000)
287 /* Symbol is mentioned by a section which was not garbage collected. */
288 #define XCOFF_MARK (02000)
289 /* Symbol size is recorded in size_list list from hash table. */
290 #define XCOFF_HAS_SIZE (04000)
292 /* The storage mapping class. */
293 unsigned char smclas;
296 /* The XCOFF linker hash table. */
298 struct xcoff_link_hash_table
300 struct bfd_link_hash_table root;
302 /* The .debug string hash table. We need to compute this while
303 reading the input files, so that we know how large the .debug
304 section will be before we assign section positions. */
305 struct bfd_strtab_hash *debug_strtab;
307 /* The .debug section we will use for the final output. */
308 asection *debug_section;
310 /* The .loader section we will use for the final output. */
311 asection *loader_section;
313 /* A count of non TOC relative relocs which will need to be
314 allocated in the .loader section. */
317 /* The .loader section header. */
318 struct internal_ldhdr ldhdr;
320 /* The .gl section we use to hold global linkage code. */
321 asection *linkage_section;
323 /* The .tc section we use to hold toc entries we build for global
325 asection *toc_section;
327 /* The list of import files. */
328 struct xcoff_import_file *imports;
330 /* Required alignment of sections within the output file. */
331 unsigned long file_align;
333 /* Whether the .text section must be read-only. */
336 /* Whether garbage collection was done. */
339 /* A linked list of symbols for which we have size information. */
340 struct xcoff_link_size_list
342 struct xcoff_link_size_list *next;
343 struct xcoff_link_hash_entry *h;
348 /* Information we keep for each section in the output file during the
351 struct xcoff_link_section_info
353 /* The relocs to be output. */
354 struct internal_reloc *relocs;
355 /* For each reloc against a global symbol whose index was not known
356 when the reloc was handled, the global hash table entry. */
357 struct xcoff_link_hash_entry **rel_hashes;
358 /* If there is a TOC relative reloc against a global symbol, and the
359 index of the TOC symbol is not known when the reloc was handled,
360 an entry is added to this linked list. This is not an array,
361 like rel_hashes, because this case is quite uncommon. */
362 struct xcoff_toc_rel_hash
364 struct xcoff_toc_rel_hash *next;
365 struct xcoff_link_hash_entry *h;
366 struct internal_reloc *rel;
370 /* Information that we pass around while doing the final link step. */
372 struct xcoff_final_link_info
374 /* General link information. */
375 struct bfd_link_info *info;
378 /* Hash table for long symbol names. */
379 struct bfd_strtab_hash *strtab;
380 /* Array of information kept for each output section, indexed by the
381 target_index field. */
382 struct xcoff_link_section_info *section_info;
383 /* Symbol index of last C_FILE symbol (-1 if none). */
384 long last_file_index;
385 /* Contents of last C_FILE symbol. */
386 struct internal_syment last_file;
387 /* Symbol index of TOC symbol. */
389 /* Start of .loader symbols. */
390 struct external_ldsym *ldsym;
391 /* Next .loader reloc to swap out. */
392 struct external_ldrel *ldrel;
393 /* Buffer large enough to hold swapped symbols of any input file. */
394 struct internal_syment *internal_syms;
395 /* Buffer large enough to hold output indices of symbols of any
398 /* Buffer large enough to hold output symbols for any input file. */
400 /* Buffer large enough to hold external line numbers for any input
403 /* Buffer large enough to hold any input section. */
405 /* Buffer large enough to hold external relocs of any input section. */
406 bfd_byte *external_relocs;
409 static void xcoff_swap_ldhdr_out
410 PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *));
411 static void xcoff_swap_ldsym_out
412 PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *));
413 static void xcoff_swap_ldrel_out
414 PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *));
415 static struct bfd_hash_entry *xcoff_link_hash_newfunc
416 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
417 static struct internal_reloc *xcoff_read_internal_relocs
418 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
419 struct internal_reloc *));
420 static boolean xcoff_link_add_object_symbols
421 PARAMS ((bfd *, struct bfd_link_info *));
422 static boolean xcoff_link_check_archive_element
423 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
424 static boolean xcoff_link_check_ar_symbols
425 PARAMS ((bfd *, struct bfd_link_info *, boolean *));
426 static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
427 static boolean xcoff_link_add_dynamic_symbols
428 PARAMS ((bfd *, struct bfd_link_info *));
429 static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
430 static void xcoff_sweep PARAMS ((struct bfd_link_info *));
431 static boolean xcoff_build_ldsyms
432 PARAMS ((struct xcoff_link_hash_entry *, PTR));
433 static boolean xcoff_link_input_bfd
434 PARAMS ((struct xcoff_final_link_info *, bfd *));
435 static boolean xcoff_write_global_symbol
436 PARAMS ((struct xcoff_link_hash_entry *, PTR));
437 static boolean xcoff_reloc_link_order
438 PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
439 struct bfd_link_order *));
440 static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
442 /* Routines to swap information in the XCOFF .loader section. We only
443 need to swap this information out, not in. I believe that only the
444 loader needs to swap this information in. If we ever need to write
445 an XCOFF loader, this stuff will need to be moved to another file
446 shared by the linker (which XCOFF calls the ``binder'') and the
449 /* Swap out the ldhdr structure. */
452 xcoff_swap_ldhdr_out (abfd, src, dst)
454 const struct internal_ldhdr *src;
455 struct external_ldhdr *dst;
457 bfd_put_32 (abfd, src->l_version, dst->l_version);
458 bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms);
459 bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc);
460 bfd_put_32 (abfd, src->l_istlen, dst->l_istlen);
461 bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid);
462 bfd_put_32 (abfd, src->l_impoff, dst->l_impoff);
463 bfd_put_32 (abfd, src->l_stlen, dst->l_stlen);
464 bfd_put_32 (abfd, src->l_stoff, dst->l_stoff);
467 /* Swap out the ldsym structure. */
470 xcoff_swap_ldsym_out (abfd, src, dst)
472 const struct internal_ldsym *src;
473 struct external_ldsym *dst;
475 if (src->_l._l_l._l_zeroes != 0)
476 memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
479 bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes);
480 bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset);
482 bfd_put_32 (abfd, src->l_value, dst->l_value);
483 bfd_put_16 (abfd, src->l_scnum, dst->l_scnum);
484 bfd_put_8 (abfd, src->l_smtype, dst->l_smtype);
485 bfd_put_8 (abfd, src->l_smclas, dst->l_smclas);
486 bfd_put_32 (abfd, src->l_ifile, dst->l_ifile);
487 bfd_put_32 (abfd, src->l_parm, dst->l_parm);
490 /* Swap out the ldrel structure. */
493 xcoff_swap_ldrel_out (abfd, src, dst)
495 const struct internal_ldrel *src;
496 struct external_ldrel *dst;
498 bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr);
499 bfd_put_32 (abfd, src->l_symndx, dst->l_symndx);
500 bfd_put_16 (abfd, src->l_rtype, dst->l_rtype);
501 bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm);
504 /* Routine to create an entry in an XCOFF link hash table. */
506 static struct bfd_hash_entry *
507 xcoff_link_hash_newfunc (entry, table, string)
508 struct bfd_hash_entry *entry;
509 struct bfd_hash_table *table;
512 struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry;
514 /* Allocate the structure if it has not already been allocated by a
516 if (ret == (struct xcoff_link_hash_entry *) NULL)
517 ret = ((struct xcoff_link_hash_entry *)
518 bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
519 if (ret == (struct xcoff_link_hash_entry *) NULL)
521 bfd_set_error (bfd_error_no_memory);
522 return (struct bfd_hash_entry *) ret;
525 /* Call the allocation method of the superclass. */
526 ret = ((struct xcoff_link_hash_entry *)
527 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
531 /* Set local fields. */
533 ret->toc_section = NULL;
534 ret->u.toc_indx = -1;
535 ret->descriptor = NULL;
539 ret->smclas = XMC_UA;
542 return (struct bfd_hash_entry *) ret;
545 /* Create a XCOFF link hash table. */
547 struct bfd_link_hash_table *
548 _bfd_xcoff_bfd_link_hash_table_create (abfd)
551 struct xcoff_link_hash_table *ret;
553 ret = ((struct xcoff_link_hash_table *)
554 bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table)));
555 if (ret == (struct xcoff_link_hash_table *) NULL)
557 bfd_set_error (bfd_error_no_memory);
558 return (struct bfd_link_hash_table *) NULL;
560 if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
562 bfd_release (abfd, ret);
563 return (struct bfd_link_hash_table *) NULL;
566 ret->debug_strtab = _bfd_xcoff_stringtab_init ();
567 ret->debug_section = NULL;
568 ret->loader_section = NULL;
569 ret->ldrel_count = 0;
570 memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
571 ret->linkage_section = NULL;
572 ret->toc_section = NULL;
581 /* Look up an entry in an XCOFF link hash table. */
583 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
584 ((struct xcoff_link_hash_entry *) \
585 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
588 /* Traverse an XCOFF link hash table. */
590 #define xcoff_link_hash_traverse(table, func, info) \
591 (bfd_link_hash_traverse \
593 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
596 /* Get the XCOFF link hash table from the info structure. This is
599 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
601 /* Read internal relocs for an XCOFF csect. This is a wrapper around
602 _bfd_coff_read_internal_relocs which tries to take advantage of any
603 relocs which may have been cached for the enclosing section. */
605 static struct internal_reloc *
606 xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
607 require_internal, internal_relocs)
611 bfd_byte *external_relocs;
612 boolean require_internal;
613 struct internal_reloc *internal_relocs;
615 if (coff_section_data (abfd, sec) != NULL
616 && coff_section_data (abfd, sec)->relocs == NULL
617 && xcoff_section_data (abfd, sec) != NULL)
621 enclosing = xcoff_section_data (abfd, sec)->enclosing;
623 if (enclosing != NULL
624 && (coff_section_data (abfd, enclosing) == NULL
625 || coff_section_data (abfd, enclosing)->relocs == NULL)
627 && enclosing->reloc_count > 0)
629 if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
630 external_relocs, false,
631 (struct internal_reloc *) NULL)
636 if (enclosing != NULL
637 && coff_section_data (abfd, enclosing) != NULL
638 && coff_section_data (abfd, enclosing)->relocs != NULL)
642 off = ((sec->rel_filepos - enclosing->rel_filepos)
643 / bfd_coff_relsz (abfd));
644 if (! require_internal)
645 return coff_section_data (abfd, enclosing)->relocs + off;
646 memcpy (internal_relocs,
647 coff_section_data (abfd, enclosing)->relocs + off,
648 sec->reloc_count * sizeof (struct internal_reloc));
649 return internal_relocs;
653 return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
654 require_internal, internal_relocs);
657 /* Given an XCOFF BFD, add symbols to the global hash table as
661 _bfd_xcoff_bfd_link_add_symbols (abfd, info)
663 struct bfd_link_info *info;
665 switch (bfd_get_format (abfd))
668 return xcoff_link_add_object_symbols (abfd, info);
670 return (_bfd_generic_link_add_archive_symbols
671 (abfd, info, xcoff_link_check_archive_element));
673 bfd_set_error (bfd_error_wrong_format);
678 /* Add symbols from an XCOFF object file. */
681 xcoff_link_add_object_symbols (abfd, info)
683 struct bfd_link_info *info;
685 if (! _bfd_coff_get_external_symbols (abfd))
687 if (! xcoff_link_add_symbols (abfd, info))
689 if (! info->keep_memory)
691 if (! _bfd_coff_free_symbols (abfd))
697 /* Check a single archive element to see if we need to include it in
698 the link. *PNEEDED is set according to whether this element is
699 needed in the link or not. This is called via
700 _bfd_generic_link_add_archive_symbols. */
703 xcoff_link_check_archive_element (abfd, info, pneeded)
705 struct bfd_link_info *info;
708 if (! _bfd_coff_get_external_symbols (abfd))
711 if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
716 if (! xcoff_link_add_symbols (abfd, info))
720 if (! info->keep_memory || ! *pneeded)
722 if (! _bfd_coff_free_symbols (abfd))
729 /* Look through the symbols to see if this object file should be
730 included in the link. */
733 xcoff_link_check_ar_symbols (abfd, info, pneeded)
735 struct bfd_link_info *info;
738 bfd_size_type symesz;
744 symesz = bfd_coff_symesz (abfd);
745 esym = (bfd_byte *) obj_coff_external_syms (abfd);
746 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
747 while (esym < esym_end)
749 struct internal_syment sym;
751 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
753 if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
756 char buf[SYMNMLEN + 1];
757 struct bfd_link_hash_entry *h;
759 /* This symbol is externally visible, and is defined by this
762 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
765 h = bfd_link_hash_lookup (info->hash, name, false, false, true);
767 /* We are only interested in symbols that are currently
768 undefined. If a symbol is currently known to be common,
769 XCOFF linkers do not bring in an object file which
770 defines it. We also don't bring in symbols to satisfy
771 undefined references in shared objects. */
772 if (h != (struct bfd_link_hash_entry *) NULL
773 && h->type == bfd_link_hash_undefined)
775 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
782 esym += (sym.n_numaux + 1) * symesz;
785 /* We do not need this object file. */
789 /* Add all the symbols from an object file to the hash table.
791 XCOFF is a weird format. A normal XCOFF .o files will have three
792 COFF sections--.text, .data, and .bss--but each COFF section will
793 contain many csects. These csects are described in the symbol
794 table. From the linker's point of view, each csect must be
795 considered a section in its own right. For example, a TOC entry is
796 handled as a small XMC_TC csect. The linker must be able to merge
797 different TOC entries together, which means that it must be able to
798 extract the XMC_TC csects from the .data section of the input .o
801 From the point of view of our linker, this is, of course, a hideous
802 nightmare. We cope by actually creating sections for each csect,
803 and discarding the original sections. We then have to handle the
804 relocation entries carefully, since the only way to tell which
805 csect they belong to is to examine the address. */
808 xcoff_link_add_symbols (abfd, info)
810 struct bfd_link_info *info;
812 unsigned int n_tmask;
813 unsigned int n_btshft;
814 boolean default_copy;
815 bfd_size_type symcount;
816 struct xcoff_link_hash_entry **sym_hash;
817 asection **csect_cache;
818 bfd_size_type linesz;
822 unsigned int csect_index;
823 asection *first_csect;
824 bfd_size_type symesz;
827 struct reloc_info_struct
829 struct internal_reloc *relocs;
832 } *reloc_info = NULL;
834 if ((abfd->flags & DYNAMIC) != 0
835 && ! info->static_link)
836 return xcoff_link_add_dynamic_symbols (abfd, info);
838 n_tmask = coff_data (abfd)->local_n_tmask;
839 n_btshft = coff_data (abfd)->local_n_btshft;
841 /* Define macros so that ISFCN, et. al., macros work correctly. */
842 #define N_TMASK n_tmask
843 #define N_BTSHFT n_btshft
845 /* We need to build a .loader section, so we do it here. This won't
846 work if we're producing an XCOFF output file with no non dynamic
847 XCOFF input files. FIXME. */
848 if (xcoff_hash_table (info)->loader_section == NULL)
852 lsec = bfd_make_section_anyway (abfd, ".loader");
855 xcoff_hash_table (info)->loader_section = lsec;
856 lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
858 /* Likewise for the linkage section. */
859 if (xcoff_hash_table (info)->linkage_section == NULL)
863 lsec = bfd_make_section_anyway (abfd, ".gl");
866 xcoff_hash_table (info)->linkage_section = lsec;
867 lsec->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
869 /* Likewise for the TOC section. */
870 if (xcoff_hash_table (info)->toc_section == NULL)
874 tsec = bfd_make_section_anyway (abfd, ".tc");
877 xcoff_hash_table (info)->toc_section = tsec;
878 tsec->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
880 /* Likewise for the .debug section. */
881 if (xcoff_hash_table (info)->debug_section == NULL)
885 dsec = bfd_make_section_anyway (abfd, ".debug");
888 xcoff_hash_table (info)->debug_section = dsec;
889 dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
892 if (info->keep_memory)
893 default_copy = false;
897 symcount = obj_raw_syment_count (abfd);
899 /* We keep a list of the linker hash table entries that correspond
900 to each external symbol. */
901 sym_hash = ((struct xcoff_link_hash_entry **)
904 * sizeof (struct xcoff_link_hash_entry *))));
905 if (sym_hash == NULL && symcount != 0)
907 bfd_set_error (bfd_error_no_memory);
910 coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
912 (size_t) symcount * sizeof (struct xcoff_link_hash_entry *));
914 /* Because of the weird stuff we are doing with XCOFF csects, we can
915 not easily determine which section a symbol is in, so we store
916 the information in the tdata for the input file. */
917 csect_cache = ((asection **)
918 bfd_alloc (abfd, symcount * sizeof (asection *)));
919 if (csect_cache == NULL && symcount != 0)
921 bfd_set_error (bfd_error_no_memory);
924 xcoff_data (abfd)->csects = csect_cache;
925 memset (csect_cache, 0, (size_t) symcount * sizeof (asection *));
927 /* While splitting sections into csects, we need to assign the
928 relocs correctly. The relocs and the csects must both be in
929 order by VMA within a given section, so we handle this by
930 scanning along the relocs as we process the csects. We index
931 into reloc_info using the section target_index. */
932 reloc_info = ((struct reloc_info_struct *)
933 malloc ((abfd->section_count + 1)
934 * sizeof (struct reloc_info_struct)));
935 if (reloc_info == NULL)
937 bfd_set_error (bfd_error_no_memory);
940 memset ((PTR) reloc_info, 0,
941 (abfd->section_count + 1) * sizeof (struct reloc_info_struct));
943 /* Read in the relocs and line numbers for each section. */
944 linesz = bfd_coff_linesz (abfd);
945 for (sub = abfd->sections; sub != NULL; sub = sub->next)
947 if ((sub->flags & SEC_RELOC) != 0)
949 reloc_info[sub->target_index].relocs =
950 xcoff_read_internal_relocs (abfd, sub, true, (bfd_byte *) NULL,
951 false, (struct internal_reloc *) NULL);
952 reloc_info[sub->target_index].csects =
953 (asection **) malloc (sub->reloc_count * sizeof (asection *));
954 if (reloc_info[sub->target_index].csects == NULL)
956 bfd_set_error (bfd_error_no_memory);
959 memset (reloc_info[sub->target_index].csects, 0,
960 sub->reloc_count * sizeof (asection *));
963 if ((info->strip == strip_none || info->strip == strip_some)
964 && sub->lineno_count > 0)
968 linenos = (bfd_byte *) malloc (sub->lineno_count * linesz);
971 bfd_set_error (bfd_error_no_memory);
974 reloc_info[sub->target_index].linenos = linenos;
975 if (bfd_seek (abfd, sub->line_filepos, SEEK_SET) != 0
976 || (bfd_read (linenos, linesz, sub->lineno_count, abfd)
977 != linesz * sub->lineno_count))
982 /* Don't let the linker relocation routines discard the symbols. */
983 keep_syms = obj_coff_keep_syms (abfd);
984 obj_coff_keep_syms (abfd) = true;
990 symesz = bfd_coff_symesz (abfd);
991 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
992 esym = (bfd_byte *) obj_coff_external_syms (abfd);
993 esym_end = esym + symcount * symesz;
994 while (esym < esym_end)
996 struct internal_syment sym;
997 union internal_auxent aux;
999 char buf[SYMNMLEN + 1];
1004 struct xcoff_link_hash_entry *set_toc;
1006 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1008 /* In this pass we are only interested in symbols with csect
1010 if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
1012 if (sym.n_sclass == C_FILE && csect != NULL)
1014 xcoff_section_data (abfd, csect)->last_symndx =
1016 - (bfd_byte *) obj_coff_external_syms (abfd))
1022 *csect_cache = csect;
1023 else if (first_csect == NULL || sym.n_sclass == C_FILE)
1024 *csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
1026 *csect_cache = NULL;
1027 esym += (sym.n_numaux + 1) * symesz;
1028 sym_hash += sym.n_numaux + 1;
1029 csect_cache += sym.n_numaux + 1;
1033 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1037 /* If this symbol has line number information attached to it,
1038 and we're not stripping it, count the number of entries and
1039 add them to the count for this csect. In the final link pass
1040 we are going to attach line number information by symbol,
1041 rather than by section, in order to more easily handle
1042 garbage collection. */
1043 if ((info->strip == strip_none || info->strip == strip_some)
1046 && ISFCN (sym.n_type))
1048 union internal_auxent auxlin;
1050 bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
1051 sym.n_type, sym.n_sclass,
1052 0, sym.n_numaux, (PTR) &auxlin);
1053 if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
1055 asection *enclosing;
1056 bfd_size_type linoff;
1058 enclosing = xcoff_section_data (abfd, csect)->enclosing;
1059 if (enclosing == NULL)
1061 (*_bfd_error_handler)
1062 ("%s: `%s' has line numbers but no enclosing section",
1063 bfd_get_filename (abfd), name);
1064 bfd_set_error (bfd_error_bad_value);
1067 linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
1068 - enclosing->line_filepos);
1069 if (linoff < enclosing->lineno_count * linesz)
1071 struct internal_lineno lin;
1072 bfd_byte *linpstart;
1074 linpstart = (reloc_info[enclosing->target_index].linenos
1076 bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
1078 && ((bfd_size_type) lin.l_addr.l_symndx
1080 - (bfd_byte *) obj_coff_external_syms (abfd))
1083 bfd_byte *linpend, *linp;
1085 linpend = (reloc_info[enclosing->target_index].linenos
1086 + enclosing->lineno_count * linesz);
1087 for (linp = linpstart + linesz;
1091 bfd_coff_swap_lineno_in (abfd, (PTR) linp,
1093 if (lin.l_lnno == 0)
1096 csect->lineno_count += (linp - linpstart) / linesz;
1097 /* The setting of line_filepos will only be
1098 useful if all the line number entries for a
1099 csect are contiguous; this only matters for
1101 if (csect->line_filepos == 0)
1102 csect->line_filepos =
1103 auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
1109 /* Pick up the csect auxiliary information. */
1111 if (sym.n_numaux == 0)
1113 (*_bfd_error_handler)
1114 ("%s: class %d symbol `%s' has no aux entries",
1115 bfd_get_filename (abfd), sym.n_sclass, name);
1116 bfd_set_error (bfd_error_bad_value);
1120 bfd_coff_swap_aux_in (abfd,
1121 (PTR) (esym + symesz * sym.n_numaux),
1122 sym.n_type, sym.n_sclass,
1123 sym.n_numaux - 1, sym.n_numaux,
1126 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
1136 (*_bfd_error_handler)
1137 ("%s: symbol `%s' has unrecognized csect type %d",
1138 bfd_get_filename (abfd), name, smtyp);
1139 bfd_set_error (bfd_error_bad_value);
1143 /* This is an external reference. */
1144 if (sym.n_sclass == C_HIDEXT
1145 || sym.n_scnum != N_UNDEF
1146 || aux.x_csect.x_scnlen.l != 0)
1148 (*_bfd_error_handler)
1149 ("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d",
1150 bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum,
1151 aux.x_csect.x_scnlen.l);
1152 bfd_set_error (bfd_error_bad_value);
1155 section = bfd_und_section_ptr;
1159 /* This is a csect definition. */
1163 xcoff_section_data (abfd, csect)->last_symndx =
1165 - (bfd_byte *) obj_coff_external_syms (abfd))
1172 /* When we see a TOC anchor, we record the TOC value. */
1173 if (aux.x_csect.x_smclas == XMC_TC0)
1175 if (sym.n_sclass != C_HIDEXT
1176 || aux.x_csect.x_scnlen.l != 0)
1178 (*_bfd_error_handler)
1179 ("%s: XMC_TC0 symbol `%s' is class %d scnlen %d",
1180 bfd_get_filename (abfd), name, sym.n_sclass,
1181 aux.x_csect.x_scnlen.l);
1182 bfd_set_error (bfd_error_bad_value);
1185 xcoff_data (abfd)->toc = sym.n_value;
1188 /* We must merge TOC entries for the same symbol. We can
1189 merge two TOC entries if they are both C_HIDEXT, they
1190 both have the same name, they are both 4 bytes long, and
1191 they both have a relocation table entry for an external
1192 symbol with the same name. Unfortunately, this means
1193 that we must look through the relocations. Ick. */
1194 if (aux.x_csect.x_smclas == XMC_TC
1195 && sym.n_sclass == C_HIDEXT
1196 && aux.x_csect.x_scnlen.l == 4
1197 && info->hash->creator == abfd->xvec)
1199 asection *enclosing;
1200 bfd_size_type relindx;
1201 struct internal_reloc *rel;
1202 asection **rel_csect;
1204 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1205 if (enclosing == NULL)
1208 /* XCOFF requires that relocs be sorted by address, so
1209 we could do a binary search here. FIXME. */
1210 rel = reloc_info[enclosing->target_index].relocs;
1211 rel_csect = reloc_info[enclosing->target_index].csects;
1213 relindx < enclosing->reloc_count;
1214 relindx++, rel++, rel_csect++)
1216 if (*rel_csect == NULL
1217 && rel->r_vaddr == (bfd_vma) sym.n_value
1218 && rel->r_size == 31
1219 && rel->r_type == R_POS)
1222 if (relindx < enclosing->reloc_count)
1225 struct internal_syment relsym;
1227 erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
1228 + rel->r_symndx * symesz);
1229 bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
1230 if (relsym.n_sclass == C_EXT)
1232 const char *relname;
1233 char relbuf[SYMNMLEN + 1];
1235 struct xcoff_link_hash_entry *h;
1237 /* At this point we know that the TOC entry is
1238 for an externally visible symbol. */
1239 relname = _bfd_coff_internal_syment_name (abfd, &relsym,
1241 if (relname == NULL)
1244 /* We only merge TOC entries if the TC name is
1245 the same as the symbol name. This handles
1246 the normal case, but not common cases like
1247 SYM.P4 which gcc generates to store SYM + 4
1248 in the TOC. FIXME. */
1249 if (strcmp (name, relname) == 0)
1251 copy = (! info->keep_memory
1252 || relsym._n._n_n._n_zeroes != 0
1253 || relsym._n._n_n._n_offset == 0);
1254 h = xcoff_link_hash_lookup (xcoff_hash_table (info),
1255 relname, true, copy,
1260 /* At this point h->root.type could be
1261 bfd_link_hash_new. That should be OK,
1262 since we know for sure that we will come
1263 across this symbol as we step through the
1266 /* We store h in *sym_hash for the
1267 convenience of the relocate_section
1271 if (h->toc_section != NULL)
1273 /* We already have a TOC entry for this
1274 symbol, so we can just ignore this
1276 *rel_csect = bfd_und_section_ptr;
1280 /* We are about to create a TOC entry for
1288 /* We need to create a new section. We get the name from
1289 the csect storage mapping class, so that the linker can
1290 accumulate similar csects together. */
1292 static const char *csect_name_by_class[] =
1294 ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo",
1295 ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0",
1298 const char *csect_name;
1299 asection *enclosing;
1300 struct internal_reloc *rel;
1301 bfd_size_type relindx;
1302 asection **rel_csect;
1304 if ((aux.x_csect.x_smclas >=
1305 sizeof csect_name_by_class / sizeof csect_name_by_class[0])
1306 || csect_name_by_class[aux.x_csect.x_smclas] == NULL)
1308 (*_bfd_error_handler)
1309 ("%s: symbol `%s' has unrecognized smclas %d",
1310 bfd_get_filename (abfd), name, aux.x_csect.x_smclas);
1311 bfd_set_error (bfd_error_bad_value);
1315 csect_name = csect_name_by_class[aux.x_csect.x_smclas];
1316 csect = bfd_make_section_anyway (abfd, csect_name);
1319 enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
1320 if (enclosing == NULL)
1322 if (! bfd_is_abs_section (enclosing)
1323 && ((bfd_vma) sym.n_value < enclosing->vma
1324 || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
1325 > enclosing->vma + enclosing->_raw_size)))
1327 (*_bfd_error_handler)
1328 ("%s: csect `%s' not in enclosing section",
1329 bfd_get_filename (abfd), name);
1330 bfd_set_error (bfd_error_bad_value);
1333 csect->vma = sym.n_value;
1334 csect->filepos = (enclosing->filepos
1337 csect->_raw_size = aux.x_csect.x_scnlen.l;
1338 csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
1339 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1341 /* Record the enclosing section in the tdata for this new
1343 csect->used_by_bfd =
1344 ((struct coff_section_tdata *)
1345 bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
1346 if (csect->used_by_bfd == NULL)
1348 bfd_set_error (bfd_error_no_memory);
1351 coff_section_data (abfd, csect)->tdata =
1352 bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
1353 if (coff_section_data (abfd, csect)->tdata == NULL)
1355 bfd_set_error (bfd_error_no_memory);
1358 xcoff_section_data (abfd, csect)->enclosing = enclosing;
1359 xcoff_section_data (abfd, csect)->lineno_count =
1360 enclosing->lineno_count;
1362 /* XCOFF requires that relocs be sorted by address, so we
1363 could do a binary search here. FIXME. (XCOFF
1364 unfortunately does not require that symbols be sorted
1365 by address, or this would be a simple merge). */
1366 if (enclosing->owner == abfd)
1368 rel = reloc_info[enclosing->target_index].relocs;
1369 rel_csect = reloc_info[enclosing->target_index].csects;
1371 relindx < enclosing->reloc_count;
1372 relindx++, rel++, rel_csect++)
1374 if (*rel_csect == NULL
1375 && rel->r_vaddr >= csect->vma
1376 && rel->r_vaddr < csect->vma + csect->_raw_size)
1378 csect->rel_filepos = (enclosing->rel_filepos
1380 * bfd_coff_relsz (abfd)));
1384 while (relindx < enclosing->reloc_count
1385 && *rel_csect == NULL
1386 && rel->r_vaddr >= csect->vma
1387 && rel->r_vaddr < csect->vma + csect->_raw_size)
1390 csect->flags |= SEC_RELOC;
1391 ++csect->reloc_count;
1398 /* There are a number of other fields and section flags
1399 which we do not bother to set. */
1401 csect_index = ((esym
1402 - (bfd_byte *) obj_coff_external_syms (abfd))
1405 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1407 if (first_csect == NULL)
1408 first_csect = csect;
1410 /* If this symbol is C_EXT, we treat it as starting at the
1411 beginning of the newly created section. */
1412 if (sym.n_sclass == C_EXT)
1418 /* If this is a TOC section for a symbol, record it. */
1419 if (set_toc != NULL)
1420 set_toc->toc_section = csect;
1425 /* This is a label definition. The x_scnlen field is the
1426 symbol index of the csect. I believe that this must
1427 always follow the appropriate XTY_SD symbol, so I will
1433 if (aux.x_csect.x_scnlen.l < 0
1434 || (aux.x_csect.x_scnlen.l
1435 >= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
1439 section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
1441 || (section->flags & SEC_HAS_CONTENTS) == 0)
1446 (*_bfd_error_handler)
1447 ("%s: misplaced XTY_LD `%s'",
1448 bfd_get_filename (abfd), name);
1449 bfd_set_error (bfd_error_bad_value);
1453 value = sym.n_value - csect->vma;
1458 /* This is an unitialized csect. We could base the name on
1459 the storage mapping class, but we don't bother. If this
1460 csect is externally visible, it is a common symbol. */
1464 xcoff_section_data (abfd, csect)->last_symndx =
1466 - (bfd_byte *) obj_coff_external_syms (abfd))
1470 csect = bfd_make_section_anyway (abfd, ".bss");
1473 csect->vma = sym.n_value;
1474 csect->_raw_size = aux.x_csect.x_scnlen.l;
1475 csect->flags |= SEC_ALLOC;
1476 csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
1477 /* There are a number of other fields and section flags
1478 which we do not bother to set. */
1480 csect_index = ((esym
1481 - (bfd_byte *) obj_coff_external_syms (abfd))
1484 csect->used_by_bfd =
1485 ((struct coff_section_tdata *)
1486 bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
1487 if (csect->used_by_bfd == NULL)
1489 bfd_set_error (bfd_error_no_memory);
1492 coff_section_data (abfd, csect)->tdata =
1493 bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
1494 if (coff_section_data (abfd, csect)->tdata == NULL)
1496 bfd_set_error (bfd_error_no_memory);
1499 xcoff_section_data (abfd, csect)->first_symndx = csect_index;
1501 if (first_csect == NULL)
1502 first_csect = csect;
1504 if (sym.n_sclass == C_EXT)
1506 csect->flags |= SEC_IS_COMMON;
1507 csect->_raw_size = 0;
1509 value = aux.x_csect.x_scnlen.l;
1515 /* Now we have enough information to add the symbol to the
1516 linker hash table. */
1518 if (sym.n_sclass == C_EXT)
1522 BFD_ASSERT (section != NULL);
1524 /* We must copy the name into memory if we got it from the
1525 syment itself, rather than the string table. */
1526 copy = default_copy;
1527 if (sym._n._n_n._n_zeroes != 0
1528 || sym._n._n_n._n_offset == 0)
1531 if (info->hash->creator == abfd->xvec)
1533 /* If we are statically linking a shared object, it is
1534 OK for symbol redefinitions to occur. I can't figure
1535 out just what the XCOFF linker is doing, but
1536 something like this is required for -bnso to work. */
1537 *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
1538 name, true, copy, false);
1539 if (*sym_hash == NULL)
1541 if (((*sym_hash)->root.type == bfd_link_hash_defined
1542 || (*sym_hash)->root.type == bfd_link_hash_defweak)
1543 && ! bfd_is_und_section (section)
1544 && ! bfd_is_com_section (section))
1546 if ((abfd->flags & DYNAMIC) != 0)
1548 section = bfd_und_section_ptr;
1551 else if (((*sym_hash)->root.u.def.section->owner->flags
1554 (*sym_hash)->root.type = bfd_link_hash_undefined;
1555 (*sym_hash)->root.u.undef.abfd =
1556 (*sym_hash)->root.u.def.section->owner;
1561 if (! (_bfd_generic_link_add_one_symbol
1562 (info, abfd, name, flags, section, value,
1563 (const char *) NULL, copy, true,
1564 (struct bfd_link_hash_entry **) sym_hash)))
1567 if (smtyp == XTY_CM)
1569 if ((*sym_hash)->root.type != bfd_link_hash_common
1570 || (*sym_hash)->root.u.c.p->section != csect)
1572 /* We don't need the common csect we just created. */
1573 csect->_raw_size = 0;
1577 (*sym_hash)->root.u.c.p->alignment_power
1578 = csect->alignment_power;
1582 if (info->hash->creator == abfd->xvec)
1586 if (smtyp == XTY_ER || smtyp == XTY_CM)
1587 flag = XCOFF_REF_REGULAR;
1589 flag = XCOFF_DEF_REGULAR;
1590 (*sym_hash)->flags |= flag;
1592 if ((*sym_hash)->smclas == XMC_UA
1593 || flag == XCOFF_DEF_REGULAR)
1594 (*sym_hash)->smclas = aux.x_csect.x_smclas;
1598 *csect_cache = csect;
1600 esym += (sym.n_numaux + 1) * symesz;
1601 sym_hash += sym.n_numaux + 1;
1602 csect_cache += sym.n_numaux + 1;
1605 /* Make sure that we have seen all the relocs. */
1606 for (sub = abfd->sections; sub != first_csect; sub = sub->next)
1608 /* Reset the section size, since the data is now attached to the
1609 csects. Don't reset the size of the .debug section, since we
1610 need to read it below in bfd_xcoff_size_dynamic_sections. */
1611 if (strcmp (bfd_get_section_name (abfd, sub), ".debug") != 0)
1614 if ((sub->flags & SEC_RELOC) != 0)
1617 struct internal_reloc *rel;
1618 asection **rel_csect;
1620 rel = reloc_info[sub->target_index].relocs;
1621 rel_csect = reloc_info[sub->target_index].csects;
1622 for (i = 0; i < sub->reloc_count; i++, rel++, rel_csect++)
1624 if (*rel_csect == NULL)
1626 (*_bfd_error_handler)
1627 ("%s: reloc %s:%d not in csect",
1628 bfd_get_filename (abfd), sub->name, i);
1629 bfd_set_error (bfd_error_bad_value);
1633 /* We identify all symbols which are called, so that we
1634 can create glue code for calls to functions imported
1635 from dynamic objects. */
1636 if (info->hash->creator == abfd->xvec
1637 && *rel_csect != bfd_und_section_ptr
1638 && (rel->r_type == R_BR
1639 || rel->r_type == R_RBR)
1640 && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
1642 struct xcoff_link_hash_entry *h;
1644 h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
1645 h->flags |= XCOFF_CALLED;
1646 /* If the symbol name starts with a period, it is
1647 the code of a function. If the symbol is
1648 currently undefined, then add an undefined symbol
1649 for the function descriptor. This should do no
1650 harm, because any regular object that defines the
1651 function should also define the function
1652 descriptor. It helps, because it means that we
1653 will identify the function descriptor with a
1654 dynamic object if a dynamic object defines it. */
1655 if (h->root.root.string[0] == '.'
1656 && h->descriptor == NULL)
1658 struct xcoff_link_hash_entry *hds;
1660 hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
1661 h->root.root.string + 1,
1665 if (hds->root.type == bfd_link_hash_new)
1667 if (! (_bfd_generic_link_add_one_symbol
1668 (info, abfd, hds->root.root.string,
1669 (flagword) 0, bfd_und_section_ptr,
1670 (bfd_vma) 0, (const char *) NULL, false,
1672 (struct bfd_link_hash_entry **) NULL)))
1675 h->descriptor = hds;
1680 free (reloc_info[sub->target_index].csects);
1681 reloc_info[sub->target_index].csects = NULL;
1683 /* Reset SEC_RELOC, the reloc_count, and the lineno_count,
1684 since the reloc and lineno information is now attached to
1686 sub->flags &=~ SEC_RELOC;
1687 sub->reloc_count = 0;
1688 sub->lineno_count = 0;
1690 /* If we are not keeping memory, free the reloc information. */
1691 if (! info->keep_memory
1692 && coff_section_data (abfd, sub) != NULL
1693 && coff_section_data (abfd, sub)->relocs != NULL
1694 && ! coff_section_data (abfd, sub)->keep_relocs)
1696 free (coff_section_data (abfd, sub)->relocs);
1697 coff_section_data (abfd, sub)->relocs = NULL;
1701 /* Free up the line numbers. FIXME: We could cache these
1702 somewhere for the final link, to avoid reading them again. */
1703 if (reloc_info[sub->target_index].linenos != NULL)
1705 free (reloc_info[sub->target_index].linenos);
1706 reloc_info[sub->target_index].linenos = NULL;
1712 obj_coff_keep_syms (abfd) = keep_syms;
1717 if (reloc_info != NULL)
1719 for (sub = abfd->sections; sub != NULL; sub = sub->next)
1721 if (reloc_info[sub->target_index].csects != NULL)
1722 free (reloc_info[sub->target_index].csects);
1723 if (reloc_info[sub->target_index].linenos != NULL)
1724 free (reloc_info[sub->target_index].linenos);
1728 obj_coff_keep_syms (abfd) = keep_syms;
1735 /* This function is used to add symbols from a dynamic object to the
1736 global symbol table. */
1739 xcoff_link_add_dynamic_symbols (abfd, info)
1741 struct bfd_link_info *info;
1743 bfd_size_type symesz;
1746 struct xcoff_import_file *n;
1751 struct xcoff_import_file **pp;
1753 /* We can only handle a dynamic object if we are generating an XCOFF
1755 if (info->hash->creator != abfd->xvec)
1757 (*_bfd_error_handler)
1758 ("%s: XCOFF shared object when not producing XCOFF output",
1759 bfd_get_filename (abfd));
1760 bfd_set_error (bfd_error_invalid_operation);
1764 /* Remove the sections from this object, so that they do not get
1765 included in the link. */
1766 abfd->sections = NULL;
1768 symesz = bfd_coff_symesz (abfd);
1769 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1770 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
1771 while (esym < esym_end)
1773 struct internal_syment sym;
1775 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
1777 /* I think that every symbol mentioned in a dynamic object must
1778 be defined by that object, perhaps by importing it from
1779 another dynamic object. All we have to do is look up each
1780 external symbol. If we have already put it in the hash
1781 table, we simply set a flag indicating that it appears in a
1784 if (sym.n_sclass == C_EXT)
1787 char buf[SYMNMLEN + 1];
1788 struct xcoff_link_hash_entry *h;
1790 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
1794 /* Normally we could not xcoff_link_hash_lookup in an add
1795 symbols routine, since we might not be using an XCOFF
1796 hash table. However, we verified above that we are using
1797 an XCOFF hash table. */
1798 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name,
1799 false, false, true);
1802 h->flags |= XCOFF_REF_DYNAMIC;
1804 /* If the symbol is undefined, and the current BFD is
1805 not a dynamic object, change the BFD to this dynamic
1806 object, so that we can get the correct import file
1808 if ((h->root.type == bfd_link_hash_undefined
1809 || h->root.type == bfd_link_hash_undefweak)
1810 && (h->root.u.undef.abfd == NULL
1811 || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
1812 h->root.u.undef.abfd = abfd;
1814 if (h->smclas == XMC_UA
1815 && sym.n_numaux > 0)
1817 union internal_auxent aux;
1819 bfd_coff_swap_aux_in (abfd,
1820 (PTR) (esym + symesz * sym.n_numaux),
1821 sym.n_type, sym.n_sclass,
1822 sym.n_numaux - 1, sym.n_numaux,
1824 h->smclas = aux.x_csect.x_smclas;
1829 esym += (sym.n_numaux + 1) * symesz;
1832 /* Record this file in the import files. */
1834 n = ((struct xcoff_import_file *)
1835 bfd_alloc (abfd, sizeof (struct xcoff_import_file)));
1838 bfd_set_error (bfd_error_no_memory);
1843 /* For some reason, the path entry in the import file list for a
1844 shared object appears to always be empty. The file name is the
1847 if (abfd->my_archive == NULL)
1849 bname = bfd_get_filename (abfd);
1854 bname = bfd_get_filename (abfd->my_archive);
1855 mname = bfd_get_filename (abfd);
1857 s = strrchr (bname, '/');
1863 /* We start c at 1 because the first import file number is reserved
1865 for (pp = &xcoff_hash_table (info)->imports, c = 1;
1867 pp = &(*pp)->next, ++c)
1871 xcoff_data (abfd)->import_file_id = c;
1876 /* Routines that are called after all the input files have been
1877 handled, but before the sections are laid out in memory. */
1879 /* Record the number of elements in a set. This is used to output the
1880 correct csect length. */
1883 bfd_xcoff_link_record_set (output_bfd, info, harg, size)
1885 struct bfd_link_info *info;
1886 struct bfd_link_hash_entry *harg;
1889 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
1890 struct xcoff_link_size_list *n;
1892 /* This will hardly ever be called. I don't want to burn four bytes
1893 per global symbol, so instead the size is kept on a linked list
1894 attached to the hash table. */
1896 n = ((struct xcoff_link_size_list *)
1897 bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
1900 bfd_set_error (bfd_error_no_memory);
1903 n->next = xcoff_hash_table (info)->size_list;
1906 xcoff_hash_table (info)->size_list = n;
1908 h->flags |= XCOFF_HAS_SIZE;
1913 /* Import a symbol. */
1916 bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
1919 struct bfd_link_info *info;
1920 struct bfd_link_hash_entry *harg;
1922 const char *imppath;
1923 const char *impfile;
1924 const char *impmember;
1926 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
1928 h->flags |= XCOFF_IMPORT;
1930 if (val != (bfd_vma) -1)
1932 if (h->root.type == bfd_link_hash_defined)
1934 if (! ((*info->callbacks->multiple_definition)
1935 (info, h->root.root.string, h->root.u.def.section->owner,
1936 h->root.u.def.section, h->root.u.def.value,
1937 output_bfd, bfd_abs_section_ptr, val)))
1941 h->root.type = bfd_link_hash_defined;
1942 h->root.u.def.section = bfd_abs_section_ptr;
1943 h->root.u.def.value = val;
1946 if (h->ldsym == NULL)
1948 h->ldsym = ((struct internal_ldsym *)
1949 bfd_zalloc (output_bfd, sizeof (struct internal_ldsym)));
1950 if (h->ldsym == NULL)
1952 bfd_set_error (bfd_error_no_memory);
1957 if (imppath == NULL)
1958 h->ldsym->l_ifile = (bfd_size_type) -1;
1962 struct xcoff_import_file **pp;
1964 /* We start c at 1 because the first entry in the import list is
1965 reserved for the library search path. */
1966 for (pp = &xcoff_hash_table (info)->imports, c = 1;
1968 pp = &(*pp)->next, ++c)
1970 if (strcmp ((*pp)->path, imppath) == 0
1971 && strcmp ((*pp)->file, impfile) == 0
1972 && strcmp ((*pp)->member, impmember) == 0)
1978 struct xcoff_import_file *n;
1980 n = ((struct xcoff_import_file *)
1981 bfd_alloc (output_bfd, sizeof (struct xcoff_import_file)));
1984 bfd_set_error (bfd_error_no_memory);
1990 n->member = impmember;
1994 h->ldsym->l_ifile = c;
2000 /* Export a symbol. */
2003 bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
2005 struct bfd_link_info *info;
2006 struct bfd_link_hash_entry *harg;
2009 struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
2011 h->flags |= XCOFF_EXPORT;
2013 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
2014 I'm just going to ignore it until somebody explains it. */
2019 /* Count a reloc against a symbol. This is called for relocs
2020 generated by the linker script, typically for global constructors
2024 bfd_xcoff_link_count_reloc (output_bfd, info, name)
2026 struct bfd_link_info *info;
2029 struct xcoff_link_hash_entry *h;
2031 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, false, false,
2035 (*_bfd_error_handler) ("%s: no such symbol", name);
2036 bfd_set_error (bfd_error_no_symbols);
2040 h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
2041 ++xcoff_hash_table (info)->ldrel_count;
2043 /* Mark the symbol to avoid garbage collection. */
2044 if ((h->flags & XCOFF_MARK) == 0)
2046 h->flags |= XCOFF_MARK;
2047 if (h->root.type == bfd_link_hash_defined
2048 || h->root.type == bfd_link_hash_defweak)
2052 hsec = h->root.u.def.section;
2053 if ((hsec->flags & SEC_MARK) == 0)
2055 if (! xcoff_mark (info, hsec))
2060 if (h->toc_section != NULL
2061 && (h->toc_section->flags & SEC_MARK) == 0)
2063 if (! xcoff_mark (info, h->toc_section))
2071 /* This function is called for each symbol to which the linker script
2075 bfd_xcoff_record_link_assignment (output_bfd, info, name)
2077 struct bfd_link_info *info;
2080 struct xcoff_link_hash_entry *h;
2082 h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
2087 h->flags |= XCOFF_DEF_REGULAR;
2092 /* This structure is used to pass information through
2093 xcoff_link_hash_traverse. */
2095 struct xcoff_loader_info
2097 /* Set if a problem occurred. */
2101 /* Link information structure. */
2102 struct bfd_link_info *info;
2103 /* Number of ldsym structures. */
2105 /* Size of string table. */
2109 /* Allocated size of string table. */
2113 /* Build the .loader section. This is called by the XCOFF linker
2114 emulation before_allocation routine. We must set the size of the
2115 .loader section before the linker lays out the output file.
2116 LIBPATH is the library path to search for shared objects; this is
2117 normally built from the -L arguments passed to the linker. ENTRY
2118 is the name of the entry point symbol. */
2121 bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
2122 file_align, maxstack, maxdata, gc,
2125 struct bfd_link_info *info;
2126 const char *libpath;
2128 unsigned long file_align;
2129 unsigned long maxstack;
2130 unsigned long maxdata;
2135 struct xcoff_link_hash_entry *hentry;
2137 struct xcoff_loader_info ldinfo;
2138 size_t impsize, impcount;
2139 struct xcoff_import_file *fl;
2140 struct internal_ldhdr *ldhdr;
2141 bfd_size_type stoff;
2145 struct bfd_strtab_hash *debug_strtab;
2146 bfd_byte *debug_contents = NULL;
2148 ldinfo.failed = false;
2149 ldinfo.output_bfd = output_bfd;
2151 ldinfo.ldsym_count = 0;
2152 ldinfo.string_size = 0;
2153 ldinfo.strings = NULL;
2154 ldinfo.string_alc = 0;
2156 xcoff_data (output_bfd)->maxstack = maxstack;
2157 xcoff_data (output_bfd)->maxdata = maxdata;
2158 xcoff_data (output_bfd)->modtype = modtype;
2160 xcoff_hash_table (info)->file_align = file_align;
2161 xcoff_hash_table (info)->textro = textro;
2163 hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
2164 false, false, true);
2167 hentry->flags |= XCOFF_ENTRY;
2168 if (hentry->root.type == bfd_link_hash_defined
2169 || hentry->root.type == bfd_link_hash_defweak)
2170 xcoff_data (output_bfd)->entry_section =
2171 hentry->root.u.def.section->output_section;
2174 /* Garbage collect unused sections. */
2175 if (info->relocateable
2178 || (hentry->root.type != bfd_link_hash_defined
2179 && hentry->root.type != bfd_link_hash_defweak))
2182 xcoff_hash_table (info)->gc = false;
2184 /* We still need to call xcoff_mark, in order to set ldrel_count
2186 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2190 for (o = sub->sections; o != NULL; o = o->next)
2192 if ((o->flags & SEC_MARK) == 0)
2194 if (! xcoff_mark (info, o))
2202 if (! xcoff_mark (info, hentry->root.u.def.section))
2205 xcoff_hash_table (info)->gc = true;
2208 if (info->input_bfds == NULL)
2210 /* I'm not sure what to do in this bizarre case. */
2214 xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
2219 /* Work out the size of the import file names. Each import file ID
2220 consists of three null terminated strings: the path, the file
2221 name, and the archive member name. The first entry in the list
2222 of names is the path to use to find objects, which the linker has
2223 passed in as the libpath argument. For some reason, the path
2224 entry in the other import file names appears to always be empty. */
2225 impsize = strlen (libpath) + 3;
2227 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
2230 impsize += (strlen (fl->path)
2232 + strlen (fl->member)
2236 /* Set up the .loader section header. */
2237 ldhdr = &xcoff_hash_table (info)->ldhdr;
2238 ldhdr->l_version = 1;
2239 ldhdr->l_nsyms = ldinfo.ldsym_count;
2240 ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
2241 ldhdr->l_istlen = impsize;
2242 ldhdr->l_nimpid = impcount;
2243 ldhdr->l_impoff = (LDHDRSZ
2244 + ldhdr->l_nsyms * LDSYMSZ
2245 + ldhdr->l_nreloc * LDRELSZ);
2246 ldhdr->l_stlen = ldinfo.string_size;
2247 stoff = ldhdr->l_impoff + impsize;
2248 if (ldinfo.string_size == 0)
2251 ldhdr->l_stoff = stoff;
2253 /* We now know the final size of the .loader section. Allocate
2255 lsec = xcoff_hash_table (info)->loader_section;
2256 lsec->_raw_size = stoff + ldhdr->l_stlen;
2257 lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
2258 if (lsec->contents == NULL)
2260 bfd_set_error (bfd_error_no_memory);
2264 /* Set up the header. */
2265 xcoff_swap_ldhdr_out (output_bfd, ldhdr,
2266 (struct external_ldhdr *) lsec->contents);
2268 /* Set up the import file names. */
2269 out = (char *) lsec->contents + ldhdr->l_impoff;
2270 strcpy (out, libpath);
2271 out += strlen (libpath) + 1;
2274 for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
2276 register const char *s;
2279 while ((*out++ = *s++) != '\0')
2282 while ((*out++ = *s++) != '\0')
2285 while ((*out++ = *s++) != '\0')
2289 BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
2291 /* Set up the symbol string table. */
2292 if (ldinfo.string_size > 0)
2294 memcpy (out, ldinfo.strings, ldinfo.string_size);
2295 free (ldinfo.strings);
2296 ldinfo.strings = NULL;
2299 /* We can't set up the symbol table or the relocs yet, because we
2300 don't yet know the final position of the various sections. The
2301 .loader symbols are written out when the corresponding normal
2302 symbols are written out in xcoff_link_input_bfd or
2303 xcoff_write_global_symbol. The .loader relocs are written out
2304 when the corresponding normal relocs are handled in
2305 xcoff_link_input_bfd. */
2307 /* Allocate space for the global linkage section and the global toc
2309 sec = xcoff_hash_table (info)->linkage_section;
2310 if (sec->_raw_size > 0)
2312 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
2313 if (sec->contents == NULL)
2315 bfd_set_error (bfd_error_no_memory);
2319 sec = xcoff_hash_table (info)->toc_section;
2320 if (sec->_raw_size > 0)
2322 sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
2323 if (sec->contents == NULL)
2325 bfd_set_error (bfd_error_no_memory);
2330 /* Now that we've done garbage collection, figure out the contents
2331 of the .debug section. */
2332 debug_strtab = xcoff_hash_table (info)->debug_strtab;
2334 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2337 bfd_size_type symcount;
2338 unsigned long *debug_index;
2340 bfd_byte *esym, *esymend;
2341 bfd_size_type symesz;
2343 if (sub->xvec != info->hash->creator)
2345 subdeb = bfd_get_section_by_name (sub, ".debug");
2346 if (subdeb == NULL || subdeb->_raw_size == 0)
2349 if (info->strip == strip_all
2350 || info->strip == strip_debugger
2351 || info->discard == discard_all)
2353 subdeb->_raw_size = 0;
2357 if (! _bfd_coff_get_external_symbols (sub))
2360 symcount = obj_raw_syment_count (sub);
2361 debug_index = ((unsigned long *)
2362 bfd_zalloc (sub, symcount * sizeof (unsigned long)));
2363 if (debug_index == NULL)
2365 bfd_set_error (bfd_error_no_memory);
2368 xcoff_data (sub)->debug_indices = debug_index;
2370 /* Grab the contents of the .debug section. We use malloc and
2371 copy the neams into the debug stringtab, rather than
2372 bfd_alloc, because I expect that, when linking many files
2373 together, many of the strings will be the same. Storing the
2374 strings in the hash table should save space in this case. */
2375 debug_contents = (bfd_byte *) malloc (subdeb->_raw_size);
2376 if (debug_contents == NULL)
2378 bfd_set_error (bfd_error_no_memory);
2381 if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
2382 (file_ptr) 0, subdeb->_raw_size))
2385 csectpp = xcoff_data (sub)->csects;
2387 symesz = bfd_coff_symesz (sub);
2388 esym = (bfd_byte *) obj_coff_external_syms (sub);
2389 esymend = esym + symcount * symesz;
2390 while (esym < esymend)
2392 struct internal_syment sym;
2394 bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
2396 *debug_index = (unsigned long) -1;
2398 if (sym._n._n_n._n_zeroes == 0
2401 || ((*csectpp)->flags & SEC_MARK) != 0
2402 || *csectpp == bfd_abs_section_ptr)
2403 && bfd_coff_symname_in_debug (sub, &sym))
2408 name = (char *) debug_contents + sym._n._n_n._n_offset;
2409 indx = _bfd_stringtab_add (debug_strtab, name, true, true);
2410 if (indx == (bfd_size_type) -1)
2412 *debug_index = indx;
2415 esym += (sym.n_numaux + 1) * symesz;
2416 csectpp += sym.n_numaux + 1;
2417 debug_index += sym.n_numaux + 1;
2420 free (debug_contents);
2421 debug_contents = NULL;
2423 /* Clear the size of subdeb, so that it is not included directly
2424 in the output file. */
2425 subdeb->_raw_size = 0;
2427 if (! info->keep_memory)
2429 if (! _bfd_coff_free_symbols (sub))
2434 xcoff_hash_table (info)->debug_section->_raw_size =
2435 _bfd_stringtab_size (debug_strtab);
2440 if (ldinfo.strings != NULL)
2441 free (ldinfo.strings);
2442 if (debug_contents != NULL)
2443 free (debug_contents);
2447 /* The mark phase of garbage collection. For a given section, mark
2448 it, and all the sections which define symbols to which it refers.
2449 Because this function needs to look at the relocs, we also count
2450 the number of relocs which need to be copied into the .loader
2454 xcoff_mark (info, sec)
2455 struct bfd_link_info *info;
2458 if ((sec->flags & SEC_MARK) != 0)
2461 sec->flags |= SEC_MARK;
2463 if (sec->owner->xvec == info->hash->creator
2464 && coff_section_data (sec->owner, sec) != NULL
2465 && xcoff_section_data (sec->owner, sec) != NULL)
2467 register struct xcoff_link_hash_entry **hp, **hpend;
2468 struct internal_reloc *rel, *relend;
2470 /* Mark all the symbols in this section. */
2472 hp = (obj_xcoff_sym_hashes (sec->owner)
2473 + xcoff_section_data (sec->owner, sec)->first_symndx);
2474 hpend = (obj_xcoff_sym_hashes (sec->owner)
2475 + xcoff_section_data (sec->owner, sec)->last_symndx);
2476 for (; hp < hpend; hp++)
2478 register struct xcoff_link_hash_entry *h;
2482 && (h->flags & XCOFF_MARK) == 0)
2484 h->flags |= XCOFF_MARK;
2485 if (h->root.type == bfd_link_hash_defined
2486 || h->root.type == bfd_link_hash_defweak)
2490 hsec = h->root.u.def.section;
2491 if ((hsec->flags & SEC_MARK) == 0)
2493 if (! xcoff_mark (info, hsec))
2498 if (h->toc_section != NULL
2499 && (h->toc_section->flags & SEC_MARK) == 0)
2501 if (! xcoff_mark (info, h->toc_section))
2507 /* Look through the section relocs. */
2509 if ((sec->flags & SEC_RELOC) != 0
2510 && sec->reloc_count > 0)
2512 rel = xcoff_read_internal_relocs (sec->owner, sec, true,
2513 (bfd_byte *) NULL, false,
2514 (struct internal_reloc *) NULL);
2517 relend = rel + sec->reloc_count;
2518 for (; rel < relend; rel++)
2521 struct xcoff_link_hash_entry *h;
2523 if ((unsigned int) rel->r_symndx
2524 > obj_raw_syment_count (sec->owner))
2527 h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
2529 && (h->flags & XCOFF_MARK) == 0)
2531 h->flags |= XCOFF_MARK;
2532 if (h->root.type == bfd_link_hash_defined
2533 || h->root.type == bfd_link_hash_defweak)
2537 hsec = h->root.u.def.section;
2538 if ((hsec->flags & SEC_MARK) == 0)
2540 if (! xcoff_mark (info, hsec))
2545 if (h->toc_section != NULL
2546 && (h->toc_section->flags & SEC_MARK) == 0)
2548 if (! xcoff_mark (info, h->toc_section))
2553 rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
2555 && (rsec->flags & SEC_MARK) == 0)
2557 if (! xcoff_mark (info, rsec))
2561 /* See if this reloc needs to be copied into the .loader
2563 switch (rel->r_type)
2567 || h->root.type == bfd_link_hash_defined
2568 || h->root.type == bfd_link_hash_defweak
2569 || h->root.type == bfd_link_hash_common
2570 || ((h->flags & XCOFF_CALLED) != 0
2571 && (h->flags & XCOFF_DEF_REGULAR) == 0
2572 && (h->flags & XCOFF_REF_DYNAMIC) != 0
2573 && (h->root.type == bfd_link_hash_undefined
2574 || h->root.type == bfd_link_hash_undefweak)
2575 && h->root.root.string[0] == '.'))
2582 ++xcoff_hash_table (info)->ldrel_count;
2584 h->flags |= XCOFF_LDREL;
2591 /* We should never need a .loader reloc for a TOC
2597 if (! info->keep_memory
2598 && coff_section_data (sec->owner, sec) != NULL
2599 && coff_section_data (sec->owner, sec)->relocs != NULL
2600 && ! coff_section_data (sec->owner, sec)->keep_relocs)
2602 free (coff_section_data (sec->owner, sec)->relocs);
2603 coff_section_data (sec->owner, sec)->relocs = NULL;
2611 /* The sweep phase of garbage collection. Remove all garbage
2616 struct bfd_link_info *info;
2620 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2624 for (o = sub->sections; o != NULL; o = o->next)
2626 if ((o->flags & SEC_MARK) == 0)
2628 /* Keep all sections from non-XCOFF input files. Keep
2629 special sections. Keep .debug sections for the
2631 if (sub->xvec != info->hash->creator
2632 || o == xcoff_hash_table (info)->debug_section
2633 || o == xcoff_hash_table (info)->loader_section
2634 || o == xcoff_hash_table (info)->linkage_section
2635 || o == xcoff_hash_table (info)->toc_section
2636 || strcmp (o->name, ".debug") == 0)
2637 o->flags |= SEC_MARK;
2642 o->lineno_count = 0;
2649 /* Add a symbol to the .loader symbols, if necessary. */
2652 xcoff_build_ldsyms (h, p)
2653 struct xcoff_link_hash_entry *h;
2656 struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
2659 /* We don't want to garbage collect symbols which are not defined in
2660 XCOFF files. This is a convenient place to mark them. */
2661 if (xcoff_hash_table (ldinfo->info)->gc
2662 && (h->flags & XCOFF_MARK) == 0
2663 && (h->root.type == bfd_link_hash_defined
2664 || h->root.type == bfd_link_hash_defweak)
2665 && (h->root.u.def.section->owner == NULL
2666 || (h->root.u.def.section->owner->xvec
2667 != ldinfo->info->hash->creator)))
2668 h->flags |= XCOFF_MARK;
2670 /* If this symbol is called, and it is defined in a dynamic object,
2671 then we need to set up global linkage code for it. (Unless we
2672 did garbage collection and we didn't need this symbol.) */
2673 if ((h->flags & XCOFF_CALLED) != 0
2674 && (h->flags & XCOFF_DEF_REGULAR) == 0
2675 && (h->flags & XCOFF_REF_DYNAMIC) != 0
2676 && (h->root.type == bfd_link_hash_undefined
2677 || h->root.type == bfd_link_hash_undefweak)
2678 && h->root.root.string[0] == '.'
2679 && (! xcoff_hash_table (ldinfo->info)->gc
2680 || (h->flags & XCOFF_MARK) != 0))
2683 struct xcoff_link_hash_entry *hds;
2685 sec = xcoff_hash_table (ldinfo->info)->linkage_section;
2686 h->root.type = bfd_link_hash_defined;
2687 h->root.u.def.section = sec;
2688 h->root.u.def.value = sec->_raw_size;
2690 sec->_raw_size += XCOFF_GLINK_SIZE;
2692 /* The global linkage code requires a TOC entry for the
2694 hds = h->descriptor;
2695 BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
2696 || hds->root.type == bfd_link_hash_undefweak)
2697 && (hds->flags & XCOFF_DEF_REGULAR) == 0
2698 && (hds->flags & XCOFF_REF_DYNAMIC) != 0);
2699 hds->flags |= XCOFF_MARK;
2700 if (hds->toc_section == NULL)
2702 hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
2703 hds->u.toc_offset = hds->toc_section->_raw_size;
2704 hds->toc_section->_raw_size += 4;
2705 ++xcoff_hash_table (ldinfo->info)->ldrel_count;
2706 ++hds->toc_section->reloc_count;
2708 hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
2710 /* We need to call xcoff_build_ldsyms recursively here,
2711 because we may already have passed hds on the traversal. */
2712 xcoff_build_ldsyms (hds, p);
2716 /* If this is still a common symbol, and it wasn't garbage
2717 collected, we need to actually allocate space for it in the .bss
2719 if (h->root.type == bfd_link_hash_common
2720 && (! xcoff_hash_table (ldinfo->info)->gc
2721 || (h->flags & XCOFF_MARK) != 0)
2722 && h->root.u.c.p->section->_raw_size == 0)
2724 BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
2725 h->root.u.c.p->section->_raw_size = h->root.u.c.size;
2728 /* We need to add a symbol to the .loader section if it is mentioned
2729 in a reloc which we are copying to the .loader section and it was
2730 not defined or common, or if it is the entry point. */
2732 if (((h->flags & XCOFF_LDREL) == 0
2733 || h->root.type == bfd_link_hash_defined
2734 || h->root.type == bfd_link_hash_defweak
2735 || h->root.type == bfd_link_hash_common)
2736 && (h->flags & XCOFF_ENTRY) == 0)
2742 /* We don't need to add this symbol if we did garbage collection and
2743 we did not mark this symbol. */
2744 if (xcoff_hash_table (ldinfo->info)->gc
2745 && (h->flags & XCOFF_MARK) == 0)
2751 /* We may have already processed this symbol due to the recursive
2753 if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
2756 /* We need to add this symbol to the .loader symbols. */
2758 /* h->ldsym will already have been allocated for an explicitly
2760 if (h->ldsym == NULL)
2762 h->ldsym = ((struct internal_ldsym *)
2763 bfd_zalloc (ldinfo->output_bfd,
2764 sizeof (struct internal_ldsym)));
2765 if (h->ldsym == NULL)
2767 ldinfo->failed = true;
2768 bfd_set_error (bfd_error_no_memory);
2773 /* The first 3 symbol table indices are reserved to indicate the
2775 h->ldindx = ldinfo->ldsym_count + 3;
2777 ++ldinfo->ldsym_count;
2779 len = strlen (h->root.root.string);
2780 if (len <= SYMNMLEN)
2781 strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN);
2784 if (ldinfo->string_size + len + 3 > ldinfo->string_alc)
2787 bfd_byte *newstrings;
2789 newalc = ldinfo->string_alc * 2;
2792 while (ldinfo->string_size + len + 3 > newalc)
2795 if (ldinfo->strings == NULL)
2796 newstrings = (bfd_byte *) malloc (newalc);
2798 newstrings = ((bfd_byte *)
2799 realloc ((PTR) ldinfo->strings, newalc));
2800 if (newstrings == NULL)
2802 ldinfo->failed = true;
2803 bfd_set_error (bfd_error_no_memory);
2806 ldinfo->string_alc = newalc;
2807 ldinfo->strings = newstrings;
2810 bfd_put_16 (ldinfo->output_bfd, len + 1,
2811 ldinfo->strings + ldinfo->string_size);
2812 strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string);
2813 h->ldsym->_l._l_l._l_zeroes = 0;
2814 h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2;
2815 ldinfo->string_size += len + 3;
2818 h->flags |= XCOFF_BUILT_LDSYM;
2823 /* Do the final link step. */
2826 _bfd_xcoff_bfd_final_link (abfd, info)
2828 struct bfd_link_info *info;
2830 bfd_size_type symesz;
2831 struct xcoff_final_link_info finfo;
2833 struct bfd_link_order *p;
2834 size_t max_contents_size;
2835 size_t max_sym_count;
2836 size_t max_lineno_count;
2837 size_t max_reloc_count;
2838 size_t max_output_reloc_count;
2839 file_ptr rel_filepos;
2841 file_ptr line_filepos;
2842 unsigned int linesz;
2844 bfd_byte *external_relocs = NULL;
2845 char strbuf[STRING_SIZE_SIZE];
2847 symesz = bfd_coff_symesz (abfd);
2850 finfo.output_bfd = abfd;
2851 finfo.strtab = NULL;
2852 finfo.section_info = NULL;
2853 finfo.last_file_index = -1;
2854 finfo.toc_symindx = -1;
2855 finfo.internal_syms = NULL;
2856 finfo.sym_indices = NULL;
2857 finfo.outsyms = NULL;
2858 finfo.linenos = NULL;
2859 finfo.contents = NULL;
2860 finfo.external_relocs = NULL;
2862 finfo.ldsym = ((struct external_ldsym *)
2863 (xcoff_hash_table (info)->loader_section->contents
2865 finfo.ldrel = ((struct external_ldrel *)
2866 (xcoff_hash_table (info)->loader_section->contents
2868 + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ));
2870 xcoff_data (abfd)->coff.link_info = info;
2871 xcoff_data (abfd)->full_aouthdr = true;
2873 finfo.strtab = _bfd_stringtab_init ();
2874 if (finfo.strtab == NULL)
2877 /* Compute the file positions for all the sections. */
2878 if (abfd->output_has_begun)
2880 if (xcoff_hash_table (info)->file_align != 0)
2887 file_align = xcoff_hash_table (info)->file_align;
2888 if (file_align != 0)
2890 boolean saw_contents;
2895 /* Insert .pad sections before every section which has
2896 contents and is loaded, if it is preceded by some other
2897 section which has contents and is loaded. */
2898 saw_contents = true;
2899 for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
2901 (*op)->target_index = indx;
2902 if (strcmp ((*op)->name, ".pad") == 0)
2903 saw_contents = false;
2904 else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
2905 && ((*op)->flags & SEC_LOAD) != 0)
2908 saw_contents = true;
2915 n = bfd_make_section_anyway (abfd, ".pad");
2916 BFD_ASSERT (*op == n);
2918 n->flags = SEC_HAS_CONTENTS;
2919 n->alignment_power = 0;
2920 saw_contents = false;
2925 /* Reset the section indices after inserting the new
2928 for (o = abfd->sections; o != NULL; o = o->next)
2931 o->target_index = indx;
2933 BFD_ASSERT ((unsigned int) indx == abfd->section_count);
2935 /* Work out appropriate sizes for the .pad sections to force
2936 each section to land on a page boundary. This bit of
2937 code knows what compute_section_file_positions is going
2939 sofar = bfd_coff_filhsz (abfd);
2940 sofar += bfd_coff_aoutsz (abfd);
2941 sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
2943 for (o = abfd->sections; o != NULL; o = o->next)
2945 if (strcmp (o->name, ".pad") == 0)
2949 BFD_ASSERT (o->_raw_size == 0);
2950 pageoff = sofar & (file_align - 1);
2953 o->_raw_size = file_align - pageoff;
2954 sofar += file_align - pageoff;
2955 o->flags |= SEC_HAS_CONTENTS;
2960 if ((o->flags & SEC_HAS_CONTENTS) != 0)
2961 sofar += BFD_ALIGN (o->_raw_size,
2962 1 << o->alignment_power);
2967 bfd_coff_compute_section_file_positions (abfd);
2970 /* Count the line numbers and relocation entries required for the
2971 output file. Set the file positions for the relocs. */
2972 rel_filepos = obj_relocbase (abfd);
2973 relsz = bfd_coff_relsz (abfd);
2974 max_contents_size = 0;
2975 max_lineno_count = 0;
2976 max_reloc_count = 0;
2977 for (o = abfd->sections; o != NULL; o = o->next)
2980 o->lineno_count = 0;
2981 for (p = o->link_order_head; p != NULL; p = p->next)
2983 if (p->type == bfd_indirect_link_order)
2987 sec = p->u.indirect.section;
2989 if (info->strip == strip_none
2990 || info->strip == strip_some)
2991 o->lineno_count += sec->lineno_count;
2993 o->reloc_count += sec->reloc_count;
2995 if (sec->_raw_size > max_contents_size)
2996 max_contents_size = sec->_raw_size;
2997 if (sec->lineno_count > max_lineno_count)
2998 max_lineno_count = sec->lineno_count;
2999 if (coff_section_data (sec->owner, sec) != NULL
3000 && xcoff_section_data (sec->owner, sec) != NULL
3001 && (xcoff_section_data (sec->owner, sec)->lineno_count
3002 > max_lineno_count))
3004 xcoff_section_data (sec->owner, sec)->lineno_count;
3005 if (sec->reloc_count > max_reloc_count)
3006 max_reloc_count = sec->reloc_count;
3008 else if (p->type == bfd_section_reloc_link_order
3009 || p->type == bfd_symbol_reloc_link_order)
3012 if (o->reloc_count == 0)
3016 o->flags |= SEC_RELOC;
3017 o->rel_filepos = rel_filepos;
3018 rel_filepos += o->reloc_count * relsz;
3022 /* Allocate space for the pointers we need to keep for the relocs. */
3026 /* We use section_count + 1, rather than section_count, because
3027 the target_index fields are 1 based. */
3028 finfo.section_info = ((struct xcoff_link_section_info *)
3029 malloc ((abfd->section_count + 1)
3030 * sizeof (struct xcoff_link_section_info)));
3031 if (finfo.section_info == NULL)
3033 bfd_set_error (bfd_error_no_memory);
3036 for (i = 0; i <= abfd->section_count; i++)
3038 finfo.section_info[i].relocs = NULL;
3039 finfo.section_info[i].rel_hashes = NULL;
3040 finfo.section_info[i].toc_rel_hashes = NULL;
3044 /* We now know the size of the relocs, so we can determine the file
3045 positions of the line numbers. */
3046 line_filepos = rel_filepos;
3047 linesz = bfd_coff_linesz (abfd);
3048 max_output_reloc_count = 0;
3049 for (o = abfd->sections; o != NULL; o = o->next)
3051 if (o->lineno_count == 0)
3052 o->line_filepos = 0;
3055 o->line_filepos = line_filepos;
3056 line_filepos += o->lineno_count * linesz;
3059 if (o->reloc_count != 0)
3061 /* We don't know the indices of global symbols until we have
3062 written out all the local symbols. For each section in
3063 the output file, we keep an array of pointers to hash
3064 table entries. Each entry in the array corresponds to a
3065 reloc. When we find a reloc against a global symbol, we
3066 set the corresponding entry in this array so that we can
3067 fix up the symbol index after we have written out all the
3070 Because of this problem, we also keep the relocs in
3071 memory until the end of the link. This wastes memory.
3072 We could backpatch the file later, I suppose, although it
3074 finfo.section_info[o->target_index].relocs =
3075 ((struct internal_reloc *)
3076 malloc (o->reloc_count * sizeof (struct internal_reloc)));
3077 finfo.section_info[o->target_index].rel_hashes =
3078 ((struct xcoff_link_hash_entry **)
3079 malloc (o->reloc_count
3080 * sizeof (struct xcoff_link_hash_entry *)));
3081 if (finfo.section_info[o->target_index].relocs == NULL
3082 || finfo.section_info[o->target_index].rel_hashes == NULL)
3084 bfd_set_error (bfd_error_no_memory);
3088 if (o->reloc_count > max_output_reloc_count)
3089 max_output_reloc_count = o->reloc_count;
3092 /* Reset the reloc and lineno counts, so that we can use them to
3093 count the number of entries we have output so far. */
3095 o->lineno_count = 0;
3098 obj_sym_filepos (abfd) = line_filepos;
3100 /* Figure out the largest number of symbols in an input BFD. Take
3101 the opportunity to clear the output_has_begun fields of all the
3102 input BFD's. We want at least 4 symbols, since that is the
3103 number which xcoff_write_global_symbol may need. */
3105 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
3109 sub->output_has_begun = false;
3110 sz = obj_raw_syment_count (sub);
3111 if (sz > max_sym_count)
3115 /* Allocate some buffers used while linking. */
3116 finfo.internal_syms = ((struct internal_syment *)
3117 malloc (max_sym_count
3118 * sizeof (struct internal_syment)));
3119 finfo.sym_indices = (long *) malloc (max_sym_count * sizeof (long));
3120 finfo.outsyms = ((bfd_byte *)
3121 malloc ((size_t) ((max_sym_count + 1) * symesz)));
3122 finfo.linenos = (bfd_byte *) malloc (max_lineno_count
3123 * bfd_coff_linesz (abfd));
3124 finfo.contents = (bfd_byte *) malloc (max_contents_size);
3125 finfo.external_relocs = (bfd_byte *) malloc (max_reloc_count * relsz);
3126 if ((finfo.internal_syms == NULL && max_sym_count > 0)
3127 || (finfo.sym_indices == NULL && max_sym_count > 0)
3128 || finfo.outsyms == NULL
3129 || (finfo.linenos == NULL && max_lineno_count > 0)
3130 || (finfo.contents == NULL && max_contents_size > 0)
3131 || (finfo.external_relocs == NULL && max_reloc_count > 0))
3133 bfd_set_error (bfd_error_no_memory);
3137 obj_raw_syment_count (abfd) = 0;
3138 xcoff_data (abfd)->toc = (bfd_vma) -1;
3140 /* We now know the position of everything in the file, except that
3141 we don't know the size of the symbol table and therefore we don't
3142 know where the string table starts. We just build the string
3143 table in memory as we go along. We process all the relocations
3144 for a single input file at once. */
3145 for (o = abfd->sections; o != NULL; o = o->next)
3147 for (p = o->link_order_head; p != NULL; p = p->next)
3149 if (p->type == bfd_indirect_link_order
3150 && p->u.indirect.section->owner->xvec == abfd->xvec)
3152 sub = p->u.indirect.section->owner;
3153 if (! sub->output_has_begun)
3155 if (! xcoff_link_input_bfd (&finfo, sub))
3157 sub->output_has_begun = true;
3160 else if (p->type == bfd_section_reloc_link_order
3161 || p->type == bfd_symbol_reloc_link_order)
3163 if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
3168 if (! _bfd_default_link_order (abfd, info, o, p))
3174 /* Free up the buffers used by xcoff_link_input_bfd. */
3176 if (finfo.internal_syms != NULL)
3178 free (finfo.internal_syms);
3179 finfo.internal_syms = NULL;
3181 if (finfo.sym_indices != NULL)
3183 free (finfo.sym_indices);
3184 finfo.sym_indices = NULL;
3186 if (finfo.linenos != NULL)
3188 free (finfo.linenos);
3189 finfo.linenos = NULL;
3191 if (finfo.contents != NULL)
3193 free (finfo.contents);
3194 finfo.contents = NULL;
3196 if (finfo.external_relocs != NULL)
3198 free (finfo.external_relocs);
3199 finfo.external_relocs = NULL;
3202 /* The value of the last C_FILE symbol is supposed to be -1. Write
3204 if (finfo.last_file_index != -1)
3206 finfo.last_file.n_value = -1;
3207 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
3208 (PTR) finfo.outsyms);
3210 (obj_sym_filepos (abfd)
3211 + finfo.last_file_index * symesz),
3213 || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
3217 /* Write out all the global symbols which do not come from XCOFF
3219 xcoff_link_hash_traverse (xcoff_hash_table (info),
3220 xcoff_write_global_symbol,
3223 if (finfo.outsyms != NULL)
3225 free (finfo.outsyms);
3226 finfo.outsyms = NULL;
3229 /* Now that we have written out all the global symbols, we know the
3230 symbol indices to use for relocs against them, and we can finally
3231 write out the relocs. */
3232 external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz);
3233 if (external_relocs == NULL && max_output_reloc_count != 0)
3235 bfd_set_error (bfd_error_no_memory);
3239 for (o = abfd->sections; o != NULL; o = o->next)
3241 struct internal_reloc *irel;
3242 struct internal_reloc *irelend;
3243 struct xcoff_link_hash_entry **rel_hash;
3244 struct xcoff_toc_rel_hash *toc_rel_hash;
3247 if (o->reloc_count == 0)
3250 irel = finfo.section_info[o->target_index].relocs;
3251 irelend = irel + o->reloc_count;
3252 rel_hash = finfo.section_info[o->target_index].rel_hashes;
3253 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
3255 if (*rel_hash != NULL)
3257 if ((*rel_hash)->indx < 0)
3259 if (! ((*info->callbacks->unattached_reloc)
3260 (info, (*rel_hash)->root.root.string,
3261 (bfd *) NULL, o, irel->r_vaddr)))
3263 (*rel_hash)->indx = 0;
3265 irel->r_symndx = (*rel_hash)->indx;
3269 for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
3270 toc_rel_hash != NULL;
3271 toc_rel_hash = toc_rel_hash->next)
3273 if (toc_rel_hash->h->u.toc_indx < 0)
3275 if (! ((*info->callbacks->unattached_reloc)
3276 (info, toc_rel_hash->h->root.root.string,
3277 (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
3279 toc_rel_hash->h->u.toc_indx = 0;
3281 toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
3284 /* XCOFF requires that the relocs be sorted by address. We tend
3285 to produce them in the order in which their containing csects
3286 appear in the symbol table, which is not necessarily by
3287 address. So we sort them here. There may be a better way to
3289 qsort ((PTR) finfo.section_info[o->target_index].relocs,
3290 o->reloc_count, sizeof (struct internal_reloc),
3293 irel = finfo.section_info[o->target_index].relocs;
3294 irelend = irel + o->reloc_count;
3295 erel = external_relocs;
3296 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
3297 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
3299 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
3300 || bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
3301 abfd) != relsz * o->reloc_count)
3305 if (external_relocs != NULL)
3307 free (external_relocs);
3308 external_relocs = NULL;
3311 /* Free up the section information. */
3312 if (finfo.section_info != NULL)
3316 for (i = 0; i < abfd->section_count; i++)
3318 if (finfo.section_info[i].relocs != NULL)
3319 free (finfo.section_info[i].relocs);
3320 if (finfo.section_info[i].rel_hashes != NULL)
3321 free (finfo.section_info[i].rel_hashes);
3323 free (finfo.section_info);
3324 finfo.section_info = NULL;
3327 /* Write out the loader section contents. */
3328 BFD_ASSERT ((bfd_byte *) finfo.ldrel
3329 == (xcoff_hash_table (info)->loader_section->contents
3330 + xcoff_hash_table (info)->ldhdr.l_impoff));
3331 o = xcoff_hash_table (info)->loader_section;
3332 if (! bfd_set_section_contents (abfd, o->output_section,
3333 o->contents, o->output_offset,
3337 /* Write out the global linkage section and the toc section. */
3338 o = xcoff_hash_table (info)->linkage_section;
3339 if (o->_raw_size > 0
3340 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
3341 o->output_offset, o->_raw_size))
3343 o = xcoff_hash_table (info)->toc_section;
3344 if (o->_raw_size > 0
3345 && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
3346 o->output_offset, o->_raw_size))
3349 /* Write out the string table. */
3351 (obj_sym_filepos (abfd)
3352 + obj_raw_syment_count (abfd) * symesz),
3356 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
3357 (bfd_byte *) strbuf);
3358 if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
3360 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
3363 _bfd_stringtab_free (finfo.strtab);
3365 /* Write out the debugging string table. */
3366 o = xcoff_hash_table (info)->debug_section;
3369 struct bfd_strtab_hash *debug_strtab;
3371 debug_strtab = xcoff_hash_table (info)->debug_strtab;
3372 BFD_ASSERT (o->output_section->_raw_size - o->output_offset
3373 >= _bfd_stringtab_size (debug_strtab));
3375 o->output_section->filepos + o->output_offset,
3378 if (! _bfd_stringtab_emit (abfd, debug_strtab))
3382 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
3383 not try to write out the symbols. */
3384 bfd_get_symcount (abfd) = 0;
3389 if (finfo.strtab != NULL)
3390 _bfd_stringtab_free (finfo.strtab);
3391 if (finfo.section_info != NULL)
3395 for (i = 0; i < abfd->section_count; i++)
3397 if (finfo.section_info[i].relocs != NULL)
3398 free (finfo.section_info[i].relocs);
3399 if (finfo.section_info[i].rel_hashes != NULL)
3400 free (finfo.section_info[i].rel_hashes);
3402 free (finfo.section_info);
3404 if (finfo.internal_syms != NULL)
3405 free (finfo.internal_syms);
3406 if (finfo.sym_indices != NULL)
3407 free (finfo.sym_indices);
3408 if (finfo.outsyms != NULL)
3409 free (finfo.outsyms);
3410 if (finfo.linenos != NULL)
3411 free (finfo.linenos);
3412 if (finfo.contents != NULL)
3413 free (finfo.contents);
3414 if (finfo.external_relocs != NULL)
3415 free (finfo.external_relocs);
3416 if (external_relocs != NULL)
3417 free (external_relocs);
3421 /* Link an input file into the linker output file. This function
3422 handles all the sections and relocations of the input file at once. */
3425 xcoff_link_input_bfd (finfo, input_bfd)
3426 struct xcoff_final_link_info *finfo;
3430 const char *strings;
3431 bfd_size_type syment_base;
3432 unsigned int n_tmask;
3433 unsigned int n_btshft;
3435 bfd_size_type isymesz;
3436 bfd_size_type osymesz;
3437 bfd_size_type linesz;
3440 struct xcoff_link_hash_entry **sym_hash;
3441 struct internal_syment *isymp;
3443 unsigned long *debug_index;
3445 unsigned long output_index;
3451 /* We can just skip DYNAMIC files, unless this is a static link. */
3452 if ((input_bfd->flags & DYNAMIC) != 0
3453 && ! finfo->info->static_link)
3456 /* Move all the symbols to the output file. */
3458 output_bfd = finfo->output_bfd;
3460 syment_base = obj_raw_syment_count (output_bfd);
3461 isymesz = bfd_coff_symesz (input_bfd);
3462 osymesz = bfd_coff_symesz (output_bfd);
3463 linesz = bfd_coff_linesz (input_bfd);
3464 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
3466 n_tmask = coff_data (input_bfd)->local_n_tmask;
3467 n_btshft = coff_data (input_bfd)->local_n_btshft;
3469 /* Define macros so that ISFCN, et. al., macros work correctly. */
3470 #define N_TMASK n_tmask
3471 #define N_BTSHFT n_btshft
3474 if (! finfo->info->keep_memory)
3477 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
3480 if (! _bfd_coff_get_external_symbols (input_bfd))
3483 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
3484 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
3485 sym_hash = obj_xcoff_sym_hashes (input_bfd);
3486 csectpp = xcoff_data (input_bfd)->csects;
3487 debug_index = xcoff_data (input_bfd)->debug_indices;
3488 isymp = finfo->internal_syms;
3489 indexp = finfo->sym_indices;
3490 output_index = syment_base;
3491 outsym = finfo->outsyms;
3494 while (esym < esym_end)
3496 struct internal_syment isym;
3497 union internal_auxent aux;
3503 bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
3505 /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
3507 if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
3509 BFD_ASSERT (isymp->n_numaux > 0);
3510 bfd_coff_swap_aux_in (input_bfd,
3511 (PTR) (esym + isymesz * isymp->n_numaux),
3512 isymp->n_type, isymp->n_sclass,
3513 isymp->n_numaux - 1, isymp->n_numaux,
3515 smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
3518 /* Make a copy of *isymp so that the relocate_section function
3519 always sees the original values. This is more reliable than
3520 always recomputing the symbol value even if we are stripping
3524 /* If this symbol is in the .loader section, swap out the
3525 .loader symbol information. If this is an external symbol
3526 reference to a defined symbol, though, then wait until we get
3527 to the definition. */
3528 if (isym.n_sclass == C_EXT
3529 && *sym_hash != NULL
3530 && (*sym_hash)->ldsym != NULL
3532 || (*sym_hash)->root.type == bfd_link_hash_undefined))
3534 struct xcoff_link_hash_entry *h;
3535 struct internal_ldsym *ldsym;
3539 if (isym.n_scnum > 0)
3541 ldsym->l_scnum = (*csectpp)->output_section->target_index;
3542 ldsym->l_value = (isym.n_value
3543 + (*csectpp)->output_section->vma
3544 + (*csectpp)->output_offset
3549 ldsym->l_scnum = isym.n_scnum;
3550 ldsym->l_value = isym.n_value;
3553 ldsym->l_smtype = smtyp;
3554 if (((h->flags & XCOFF_DEF_REGULAR) == 0
3555 && (h->flags & XCOFF_REF_DYNAMIC) != 0)
3556 || (h->flags & XCOFF_IMPORT) != 0)
3557 ldsym->l_smtype |= L_IMPORT;
3558 if (((h->flags & XCOFF_DEF_REGULAR) != 0
3559 && (h->flags & XCOFF_REF_DYNAMIC) != 0)
3560 || (h->flags & XCOFF_EXPORT) != 0)
3561 ldsym->l_smtype |= L_EXPORT;
3562 if ((h->flags & XCOFF_ENTRY) != 0)
3563 ldsym->l_smtype |= L_ENTRY;
3565 ldsym->l_smclas = aux.x_csect.x_smclas;
3567 if (ldsym->l_ifile == (bfd_size_type) -1)
3569 else if (ldsym->l_ifile == 0)
3571 if ((ldsym->l_smtype & L_IMPORT) == 0)
3577 if (h->root.type == bfd_link_hash_defined
3578 || h->root.type == bfd_link_hash_defweak)
3579 impbfd = h->root.u.def.section->owner;
3580 else if (h->root.type == bfd_link_hash_undefined
3581 || h->root.type == bfd_link_hash_undefweak)
3582 impbfd = h->root.u.undef.abfd;
3590 BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
3591 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
3598 BFD_ASSERT (h->ldindx >= 0);
3599 BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
3600 xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
3601 finfo->ldsym + h->ldindx - 3);
3609 add = 1 + isym.n_numaux;
3611 /* If we are skipping this csect, we want to skip this symbol. */
3612 if (*csectpp == NULL)
3615 /* If we garbage collected this csect, we want to skip this
3618 && xcoff_hash_table (finfo->info)->gc
3619 && ((*csectpp)->flags & SEC_MARK) == 0
3620 && *csectpp != bfd_abs_section_ptr)
3623 /* An XCOFF linker always skips C_STAT symbols. */
3625 && isymp->n_sclass == C_STAT)
3628 /* We skip all but the first TOC anchor. */
3630 && isymp->n_sclass == C_HIDEXT
3631 && aux.x_csect.x_smclas == XMC_TC0)
3633 if (finfo->toc_symindx != -1)
3637 finfo->toc_symindx = output_index;
3638 xcoff_data (finfo->output_bfd)->toc =
3639 ((*csectpp)->output_section->vma
3640 + (*csectpp)->output_offset
3643 xcoff_data (finfo->output_bfd)->toc_section =
3644 (*csectpp)->output_section;
3649 /* If we are stripping all symbols, we want to skip this one. */
3651 && finfo->info->strip == strip_all)
3654 /* We can skip resolved external references. */
3656 && isym.n_sclass == C_EXT
3658 && (*sym_hash)->root.type != bfd_link_hash_undefined)
3661 /* We can skip common symbols if they got defined somewhere
3664 && isym.n_sclass == C_EXT
3666 && ((*sym_hash)->root.type != bfd_link_hash_common
3667 || (*sym_hash)->root.u.c.p->section != *csectpp)
3668 && ((*sym_hash)->root.type != bfd_link_hash_defined
3669 || (*sym_hash)->root.u.def.section != *csectpp))
3672 /* Skip local symbols if we are discarding them. */
3674 && finfo->info->discard == discard_all
3675 && isym.n_sclass != C_EXT
3676 && (isym.n_sclass != C_HIDEXT
3677 || smtyp != XTY_SD))
3680 /* If we stripping debugging symbols, and this is a debugging
3681 symbol, then skip it. */
3683 && finfo->info->strip == strip_debugger
3684 && isym.n_scnum == N_DEBUG)
3687 /* If some symbols are stripped based on the name, work out the
3688 name and decide whether to skip this symbol. We don't handle
3689 this correctly for symbols whose names are in the .debug
3690 section; to get it right we would need a new bfd_strtab_hash
3691 function to return the string given the index. */
3693 && (finfo->info->strip == strip_some
3694 || finfo->info->discard == discard_l)
3695 && (debug_index == NULL || *debug_index == (unsigned long) -1))
3698 char buf[SYMNMLEN + 1];
3700 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
3704 if ((finfo->info->strip == strip_some
3705 && (bfd_hash_lookup (finfo->info->keep_hash, name, false,
3707 || (finfo->info->discard == discard_l
3708 && (isym.n_sclass != C_EXT
3709 && (isym.n_sclass != C_HIDEXT
3710 || smtyp != XTY_SD))
3711 && strncmp (name, finfo->info->lprefix,
3712 finfo->info->lprefix_len) == 0))
3716 /* We can not skip the first TOC anchor. */
3719 && finfo->info->strip != strip_all)
3722 /* We now know whether we are to skip this symbol or not. */
3725 /* Adjust the symbol in order to output it. */
3727 if (isym._n._n_n._n_zeroes == 0
3728 && isym._n._n_n._n_offset != 0)
3730 /* This symbol has a long name. Enter it in the string
3731 table we are building. If *debug_index != -1, the
3732 name has already been entered in the .debug section. */
3733 if (debug_index != NULL && *debug_index != (unsigned long) -1)
3734 isym._n._n_n._n_offset = *debug_index;
3740 name = _bfd_coff_internal_syment_name (input_bfd, &isym,
3744 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
3745 if (indx == (bfd_size_type) -1)
3747 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
3751 if (isym.n_sclass != C_BSTAT
3752 && isym.n_sclass != C_ESTAT
3753 && isym.n_scnum > 0)
3755 isym.n_scnum = (*csectpp)->output_section->target_index;
3756 isym.n_value += ((*csectpp)->output_section->vma
3757 + (*csectpp)->output_offset
3761 /* The value of a C_FILE symbol is the symbol index of the
3762 next C_FILE symbol. The value of the last C_FILE symbol
3763 is -1. We try to get this right, below, just before we
3764 write the symbols out, but in the general case we may
3765 have to write the symbol out twice. */
3766 if (isym.n_sclass == C_FILE)
3768 if (finfo->last_file_index != -1
3769 && finfo->last_file.n_value != (long) output_index)
3771 /* We must correct the value of the last C_FILE entry. */
3772 finfo->last_file.n_value = output_index;
3773 if ((bfd_size_type) finfo->last_file_index >= syment_base)
3775 /* The last C_FILE symbol is in this input file. */
3776 bfd_coff_swap_sym_out (output_bfd,
3777 (PTR) &finfo->last_file,
3778 (PTR) (finfo->outsyms
3779 + ((finfo->last_file_index
3785 /* We have already written out the last C_FILE
3786 symbol. We need to write it out again. We
3787 borrow *outsym temporarily. */
3788 bfd_coff_swap_sym_out (output_bfd,
3789 (PTR) &finfo->last_file,
3791 if (bfd_seek (output_bfd,
3792 (obj_sym_filepos (output_bfd)
3793 + finfo->last_file_index * osymesz),
3795 || (bfd_write (outsym, osymesz, 1, output_bfd)
3801 finfo->last_file_index = output_index;
3802 finfo->last_file = isym;
3805 /* Output the symbol. */
3807 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
3809 *indexp = output_index;
3811 if (isym.n_sclass == C_EXT)
3814 struct xcoff_link_hash_entry *h;
3816 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
3818 h = obj_xcoff_sym_hashes (input_bfd)[indx];
3819 BFD_ASSERT (h != NULL);
3820 h->indx = output_index;
3823 /* If this is a symbol in the TOC which we may have merged
3824 (class XMC_TC), remember the symbol index of the TOC
3826 if (isym.n_sclass == C_HIDEXT
3827 && aux.x_csect.x_smclas == XMC_TC
3828 && *sym_hash != NULL)
3830 BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
3831 BFD_ASSERT ((*sym_hash)->toc_section != NULL);
3832 (*sym_hash)->u.toc_indx = output_index;
3835 output_index += add;
3836 outsym += add * osymesz;
3839 esym += add * isymesz;
3843 if (debug_index != NULL)
3846 for (--add; add > 0; --add)
3850 /* Fix up the aux entries and the C_BSTAT symbols. This must be
3851 done in a separate pass, because we don't know the correct symbol
3852 indices until we have already decided which symbols we are going
3855 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
3856 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
3857 isymp = finfo->internal_syms;
3858 indexp = finfo->sym_indices;
3859 csectpp = xcoff_data (input_bfd)->csects;
3860 outsym = finfo->outsyms;
3861 while (esym < esym_end)
3865 add = 1 + isymp->n_numaux;
3868 esym += add * isymesz;
3873 if (isymp->n_sclass == C_BSTAT)
3877 /* The value of a C_BSTAT symbol is the symbol table
3878 index of the containing csect. */
3879 indx = isymp->n_value;
3880 if (indx < obj_raw_syment_count (input_bfd))
3884 symindx = finfo->sym_indices[indx];
3888 isymp->n_value = symindx;
3889 bfd_coff_swap_sym_out (output_bfd, (PTR) isymp,
3897 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
3899 union internal_auxent aux;
3901 bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
3902 isymp->n_sclass, i, isymp->n_numaux,
3905 if (isymp->n_sclass == C_FILE)
3907 /* This is the file name (or some comment put in by
3908 the compiler). If it is long, we must put it in
3909 the string table. */
3910 if (aux.x_file.x_n.x_zeroes == 0
3911 && aux.x_file.x_n.x_offset != 0)
3913 const char *filename;
3916 BFD_ASSERT (aux.x_file.x_n.x_offset
3917 >= STRING_SIZE_SIZE);
3918 if (strings == NULL)
3920 strings = _bfd_coff_read_string_table (input_bfd);
3921 if (strings == NULL)
3924 filename = strings + aux.x_file.x_n.x_offset;
3925 indx = _bfd_stringtab_add (finfo->strtab, filename,
3927 if (indx == (bfd_size_type) -1)
3929 aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
3932 else if ((isymp->n_sclass == C_EXT
3933 || isymp->n_sclass == C_HIDEXT)
3934 && i + 1 == isymp->n_numaux)
3936 /* We don't support type checking. I don't know if
3938 aux.x_csect.x_parmhash = 0;
3939 /* I don't think anybody uses these fields, but we'd
3940 better clobber them just in case. */
3941 aux.x_csect.x_stab = 0;
3942 aux.x_csect.x_snstab = 0;
3943 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
3947 indx = aux.x_csect.x_scnlen.l;
3948 if (indx < obj_raw_syment_count (input_bfd))
3952 symindx = finfo->sym_indices[indx];
3954 aux.x_sym.x_tagndx.l = 0;
3956 aux.x_sym.x_tagndx.l = symindx;
3960 else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
3964 if (ISFCN (isymp->n_type)
3965 || ISTAG (isymp->n_sclass)
3966 || isymp->n_sclass == C_BLOCK)
3968 indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
3970 && indx < obj_raw_syment_count (input_bfd))
3972 /* We look forward through the symbol for
3973 the index of the next symbol we are going
3974 to include. I don't know if this is
3976 while (finfo->sym_indices[indx] < 0
3977 && indx < obj_raw_syment_count (input_bfd))
3979 if (indx >= obj_raw_syment_count (input_bfd))
3980 indx = output_index;
3982 indx = finfo->sym_indices[indx];
3983 aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
3987 indx = aux.x_sym.x_tagndx.l;
3988 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
3992 symindx = finfo->sym_indices[indx];
3994 aux.x_sym.x_tagndx.l = 0;
3996 aux.x_sym.x_tagndx.l = symindx;
4000 /* Copy over the line numbers, unless we are stripping
4001 them. We do this on a symbol by symbol basis in
4002 order to more easily handle garbage collection. */
4003 if ((isymp->n_sclass == C_EXT
4004 || isymp->n_sclass == C_HIDEXT)
4006 && isymp->n_numaux > 1
4007 && ISFCN (isymp->n_type)
4008 && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
4010 if (finfo->info->strip != strip_none
4011 && finfo->info->strip != strip_some)
4012 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4015 asection *enclosing;
4016 unsigned int enc_count;
4017 bfd_size_type linoff;
4018 struct internal_lineno lin;
4021 enclosing = xcoff_section_data (abfd, o)->enclosing;
4022 enc_count = xcoff_section_data (abfd, o)->lineno_count;
4023 if (oline != enclosing)
4025 if (bfd_seek (input_bfd,
4026 enclosing->line_filepos,
4028 || (bfd_read (finfo->linenos, linesz,
4029 enc_count, input_bfd)
4030 != linesz * enc_count))
4035 linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
4036 - enclosing->line_filepos);
4038 bfd_coff_swap_lineno_in (input_bfd,
4039 (PTR) (finfo->linenos + linoff),
4042 || ((bfd_size_type) lin.l_addr.l_symndx
4046 obj_coff_external_syms (input_bfd)))
4048 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
4051 bfd_byte *linpend, *linp;
4053 bfd_size_type count;
4055 lin.l_addr.l_symndx = *indexp;
4056 bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
4057 (PTR) (finfo->linenos
4060 linpend = (finfo->linenos
4061 + enc_count * linesz);
4062 offset = (o->output_section->vma
4065 for (linp = finfo->linenos + linoff + linesz;
4069 bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
4071 if (lin.l_lnno == 0)
4073 lin.l_addr.l_paddr += offset;
4074 bfd_coff_swap_lineno_out (output_bfd,
4079 count = (linp - (finfo->linenos + linoff)) / linesz;
4081 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
4082 (o->output_section->line_filepos
4083 + o->output_section->lineno_count * linesz);
4085 if (bfd_seek (output_bfd,
4086 aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
4088 || (bfd_write (finfo->linenos + linoff,
4089 linesz, count, output_bfd)
4093 o->output_section->lineno_count += count;
4098 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
4099 isymp->n_sclass, i, isymp->n_numaux,
4111 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
4112 symbol will be the first symbol in the next input file. In the
4113 normal case, this will save us from writing out the C_FILE symbol
4115 if (finfo->last_file_index != -1
4116 && (bfd_size_type) finfo->last_file_index >= syment_base)
4118 finfo->last_file.n_value = output_index;
4119 bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
4120 (PTR) (finfo->outsyms
4121 + ((finfo->last_file_index - syment_base)
4125 /* Write the modified symbols to the output file. */
4126 if (outsym > finfo->outsyms)
4128 if (bfd_seek (output_bfd,
4129 obj_sym_filepos (output_bfd) + syment_base * osymesz,
4131 || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
4133 != (bfd_size_type) (outsym - finfo->outsyms)))
4136 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
4137 + (outsym - finfo->outsyms) / osymesz)
4140 obj_raw_syment_count (output_bfd) = output_index;
4143 /* Don't let the linker relocation routines discard the symbols. */
4144 keep_syms = obj_coff_keep_syms (input_bfd);
4145 obj_coff_keep_syms (input_bfd) = true;
4147 /* Relocate the contents of each section. */
4148 for (o = input_bfd->sections; o != NULL; o = o->next)
4152 if ((o->flags & SEC_HAS_CONTENTS) == 0
4153 || o->_raw_size == 0
4154 || (o->flags & SEC_IN_MEMORY) != 0)
4157 /* We have set filepos correctly for the sections we created to
4158 represent csects, so bfd_get_section_contents should work. */
4159 if (coff_section_data (input_bfd, o) != NULL
4160 && coff_section_data (input_bfd, o)->contents != NULL)
4161 contents = coff_section_data (input_bfd, o)->contents;
4164 if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
4165 (file_ptr) 0, o->_raw_size))
4167 contents = finfo->contents;
4170 if ((o->flags & SEC_RELOC) != 0)
4173 struct internal_reloc *internal_relocs;
4174 struct internal_reloc *irel;
4176 struct internal_reloc *irelend;
4177 struct xcoff_link_hash_entry **rel_hash;
4180 /* Read in the relocs. */
4181 target_index = o->output_section->target_index;
4182 internal_relocs = (xcoff_read_internal_relocs
4183 (input_bfd, o, false, finfo->external_relocs,
4185 (finfo->section_info[target_index].relocs
4186 + o->output_section->reloc_count)));
4187 if (internal_relocs == NULL)
4190 /* Call processor specific code to relocate the section
4192 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
4196 finfo->internal_syms,
4197 xcoff_data (input_bfd)->csects))
4200 offset = o->output_section->vma + o->output_offset - o->vma;
4201 irel = internal_relocs;
4202 irelend = irel + o->reloc_count;
4203 rel_hash = (finfo->section_info[target_index].rel_hashes
4204 + o->output_section->reloc_count);
4205 for (; irel < irelend; irel++, rel_hash++)
4207 struct xcoff_link_hash_entry *h = NULL;
4208 struct internal_ldrel ldrel;
4212 /* Adjust the reloc address and symbol index. */
4214 irel->r_vaddr += offset;
4216 r_symndx = irel->r_symndx;
4220 h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
4222 && (irel->r_type == R_TOC
4223 || irel->r_type == R_GL
4224 || irel->r_type == R_TCL
4225 || irel->r_type == R_TRL
4226 || irel->r_type == R_TRLA))
4228 /* This is a TOC relative reloc with a symbol
4229 attached. The symbol should be the one which
4230 this reloc is for. We want to make this
4231 reloc against the TOC address of the symbol,
4232 not the symbol itself. */
4233 BFD_ASSERT (h->toc_section != NULL);
4234 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
4235 if (h->u.toc_indx != -1)
4236 irel->r_symndx = h->u.toc_indx;
4239 struct xcoff_toc_rel_hash *n;
4240 struct xcoff_link_section_info *si;
4242 n = ((struct xcoff_toc_rel_hash *)
4243 bfd_alloc (finfo->output_bfd,
4244 sizeof (struct xcoff_toc_rel_hash)));
4247 bfd_set_error (bfd_error_no_memory);
4250 si = finfo->section_info + target_index;
4251 n->next = si->toc_rel_hashes;
4254 si->toc_rel_hashes = n;
4259 /* This is a global symbol. */
4261 irel->r_symndx = h->indx;
4264 /* This symbol is being written at the end
4265 of the file, and we do not yet know the
4266 symbol index. We save the pointer to the
4267 hash table entry in the rel_hash list.
4268 We set the indx field to -2 to indicate
4269 that this symbol must not be stripped. */
4278 indx = finfo->sym_indices[r_symndx];
4282 struct internal_syment *is;
4284 /* Relocations against a TC0 TOC anchor are
4285 automatically transformed to be against
4286 the TOC anchor in the output file. */
4287 is = finfo->internal_syms + r_symndx;
4288 if (is->n_sclass == C_HIDEXT
4289 && is->n_numaux > 0)
4292 union internal_auxent aux;
4296 obj_coff_external_syms (input_bfd))
4297 + ((r_symndx + is->n_numaux)
4299 bfd_coff_swap_aux_in (input_bfd, auxptr,
4300 is->n_type, is->n_sclass,
4304 if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
4305 && aux.x_csect.x_smclas == XMC_TC0)
4306 indx = finfo->toc_symindx;
4311 irel->r_symndx = indx;
4314 struct internal_syment *is;
4316 char buf[SYMNMLEN + 1];
4318 /* This reloc is against a symbol we are
4319 stripping. It would be possible to handle
4320 this case, but I don't think it's worth it. */
4321 is = finfo->internal_syms + r_symndx;
4323 name = (_bfd_coff_internal_syment_name
4324 (input_bfd, is, buf));
4328 if (! ((*finfo->info->callbacks->unattached_reloc)
4329 (finfo->info, name, input_bfd, o,
4336 switch (irel->r_type)
4340 || h->root.type == bfd_link_hash_defined
4341 || h->root.type == bfd_link_hash_defweak
4342 || h->root.type == bfd_link_hash_common)
4349 /* This reloc needs to be copied into the .loader
4351 ldrel.l_vaddr = irel->r_vaddr;
4353 ldrel.l_symndx = -1;
4355 || (h->root.type == bfd_link_hash_defined
4356 || h->root.type == bfd_link_hash_defweak
4357 || h->root.type == bfd_link_hash_common))
4362 sec = xcoff_data (input_bfd)->csects[r_symndx];
4363 else if (h->root.type == bfd_link_hash_common)
4364 sec = h->root.u.c.p->section;
4366 sec = h->root.u.def.section;
4367 sec = sec->output_section;
4369 if (strcmp (sec->name, ".text") == 0)
4371 else if (strcmp (sec->name, ".data") == 0)
4373 else if (strcmp (sec->name, ".bss") == 0)
4377 (*_bfd_error_handler)
4378 ("%s: loader reloc in unrecognized section `%s'",
4379 bfd_get_filename (input_bfd),
4381 bfd_set_error (bfd_error_nonrepresentable_section);
4389 (*_bfd_error_handler)
4390 ("%s: `%s' in loader reloc but not loader sym",
4391 bfd_get_filename (input_bfd),
4392 h->root.root.string);
4393 bfd_set_error (bfd_error_bad_value);
4396 ldrel.l_symndx = h->ldindx;
4398 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
4399 ldrel.l_rsecnm = o->output_section->target_index;
4400 if (xcoff_hash_table (finfo->info)->textro
4401 && strcmp (o->output_section->name, ".text") == 0)
4403 (*_bfd_error_handler)
4404 ("%s: loader reloc in read-only section %s",
4405 bfd_get_filename (input_bfd),
4406 bfd_get_section_name (finfo->output_bfd,
4407 o->output_section));
4408 bfd_set_error (bfd_error_invalid_operation);
4411 xcoff_swap_ldrel_out (output_bfd, &ldrel,
4413 BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ);
4422 /* We should never need a .loader reloc for a TOC
4428 o->output_section->reloc_count += o->reloc_count;
4431 /* Write out the modified section contents. */
4432 if (! bfd_set_section_contents (output_bfd, o->output_section,
4433 contents, o->output_offset,
4434 (o->_cooked_size != 0
4440 obj_coff_keep_syms (input_bfd) = keep_syms;
4442 if (! finfo->info->keep_memory)
4444 if (! _bfd_coff_free_symbols (input_bfd))
4454 /* Write out a non-XCOFF global symbol. */
4457 xcoff_write_global_symbol (h, p)
4458 struct xcoff_link_hash_entry *h;
4461 struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p;
4464 struct internal_syment isym;
4465 union internal_auxent aux;
4467 output_bfd = finfo->output_bfd;
4469 /* If this symbol was garbage collected, just skip it. */
4470 if (xcoff_hash_table (finfo->info)->gc
4471 && (h->flags & XCOFF_MARK) == 0)
4474 /* If we need a .loader section entry, write it out. */
4475 if (h->ldsym != NULL)
4477 struct internal_ldsym *ldsym;
4482 if (h->root.type == bfd_link_hash_undefined
4483 || h->root.type == bfd_link_hash_undefweak)
4486 ldsym->l_scnum = N_UNDEF;
4487 ldsym->l_smtype = XTY_ER;
4488 impbfd = h->root.u.undef.abfd;
4490 else if (h->root.type == bfd_link_hash_defined
4491 || h->root.type == bfd_link_hash_defweak)
4495 sec = h->root.u.def.section;
4496 ldsym->l_value = (sec->output_section->vma
4497 + sec->output_offset
4498 + h->root.u.def.value);
4499 ldsym->l_scnum = sec->output_section->target_index;
4500 ldsym->l_smtype = XTY_SD;
4501 impbfd = sec->owner;
4506 if (((h->flags & XCOFF_DEF_REGULAR) == 0
4507 && (h->flags & XCOFF_REF_DYNAMIC) != 0)
4508 || (h->flags & XCOFF_IMPORT) != 0)
4509 ldsym->l_smtype |= L_IMPORT;
4510 if (((h->flags & XCOFF_DEF_REGULAR) != 0
4511 && (h->flags & XCOFF_REF_DYNAMIC) != 0)
4512 || (h->flags & XCOFF_EXPORT) != 0)
4513 ldsym->l_smtype |= L_EXPORT;
4514 if ((h->flags & XCOFF_ENTRY) != 0)
4515 ldsym->l_smtype |= L_ENTRY;
4517 ldsym->l_smclas = h->smclas;
4519 if (ldsym->l_ifile == (bfd_size_type) -1)
4521 else if (ldsym->l_ifile == 0)
4523 if ((ldsym->l_smtype & L_IMPORT) == 0)
4525 else if (impbfd == NULL)
4529 BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
4530 ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
4536 BFD_ASSERT (h->ldindx >= 0);
4537 BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
4538 xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3);
4542 /* If this symbol needs global linkage code, write it out. */
4543 if (h->root.type == bfd_link_hash_defined
4544 && (h->root.u.def.section
4545 == xcoff_hash_table (finfo->info)->linkage_section))
4551 p = h->root.u.def.section->contents + h->root.u.def.value;
4553 /* The first instruction in the global linkage code loads a
4554 specific TOC element. */
4555 tocoff = (h->descriptor->toc_section->output_section->vma
4556 + h->descriptor->toc_section->output_offset
4557 - xcoff_data (output_bfd)->toc);
4558 if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
4559 tocoff += h->descriptor->u.toc_offset;
4560 bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | tocoff, p);
4562 i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0];
4564 bfd_put_32 (output_bfd, xcoff_glink_code[i], p);
4567 /* If we created a TOC entry for this symbol, write out the required
4569 if ((h->flags & XCOFF_SET_TOC) != 0)
4574 struct internal_reloc *irel;
4575 struct internal_ldrel ldrel;
4577 tocsec = h->toc_section;
4578 osec = tocsec->output_section;
4579 oindx = osec->target_index;
4580 irel = finfo->section_info[oindx].relocs + osec->reloc_count;
4581 irel->r_vaddr = (osec->vma
4582 + tocsec->output_offset
4585 irel->r_symndx = h->indx;
4589 irel->r_symndx = obj_raw_syment_count (output_bfd);
4591 irel->r_type = R_POS;
4593 finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
4594 ++osec->reloc_count;
4596 BFD_ASSERT (h->ldindx >= 0);
4597 ldrel.l_vaddr = irel->r_vaddr;
4598 ldrel.l_symndx = h->ldindx;
4599 ldrel.l_rtype = (31 << 8) | R_POS;
4600 ldrel.l_rsecnm = oindx;
4601 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
4609 && (finfo->info->strip == strip_all
4610 || (finfo->info->strip == strip_some
4611 && (bfd_hash_lookup (finfo->info->keep_hash,
4612 h->root.root.string, false, false)
4617 && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
4620 outsym = finfo->outsyms;
4622 memset (&aux, 0, sizeof aux);
4624 h->indx = obj_raw_syment_count (output_bfd);
4626 if (strlen (h->root.root.string) <= SYMNMLEN)
4627 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
4634 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
4636 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
4638 if (indx == (bfd_size_type) -1)
4640 isym._n._n_n._n_zeroes = 0;
4641 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
4644 if (h->root.type == bfd_link_hash_undefined
4645 || h->root.type == bfd_link_hash_undefweak)
4648 isym.n_scnum = N_UNDEF;
4649 isym.n_sclass = C_EXT;
4650 aux.x_csect.x_smtyp = XTY_ER;
4652 else if (h->root.type == bfd_link_hash_defined
4653 || h->root.type == bfd_link_hash_defweak)
4655 struct xcoff_link_size_list *l;
4657 isym.n_value = (h->root.u.def.section->output_section->vma
4658 + h->root.u.def.section->output_offset
4659 + h->root.u.def.value);
4660 isym.n_scnum = h->root.u.def.section->output_section->target_index;
4661 isym.n_sclass = C_HIDEXT;
4662 aux.x_csect.x_smtyp = XTY_SD;
4664 if ((h->flags & XCOFF_HAS_SIZE) != 0)
4666 for (l = xcoff_hash_table (finfo->info)->size_list;
4672 aux.x_csect.x_scnlen.l = l->size;
4678 else if (h->root.type == bfd_link_hash_common)
4680 isym.n_value = (h->root.u.c.p->section->output_section->vma
4681 + h->root.u.c.p->section->output_offset);
4682 isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
4683 isym.n_sclass = C_EXT;
4684 aux.x_csect.x_smtyp = XTY_CM;
4685 aux.x_csect.x_scnlen.l = h->root.u.c.size;
4690 isym.n_type = T_NULL;
4693 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
4694 outsym += bfd_coff_symesz (output_bfd);
4696 aux.x_csect.x_smclas = h->smclas;
4698 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
4700 outsym += bfd_coff_auxesz (output_bfd);
4702 if (h->root.type == bfd_link_hash_defined
4703 || h->root.type == bfd_link_hash_defweak)
4705 /* We just output an SD symbol. Now output an LD symbol. */
4709 isym.n_sclass = C_EXT;
4710 bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
4711 outsym += bfd_coff_symesz (output_bfd);
4713 aux.x_csect.x_smtyp = XTY_LD;
4714 aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
4716 bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
4718 outsym += bfd_coff_auxesz (output_bfd);
4721 if (bfd_seek (output_bfd,
4722 (obj_sym_filepos (output_bfd)
4723 + (obj_raw_syment_count (output_bfd)
4724 * bfd_coff_symesz (output_bfd))),
4726 || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd)
4727 != (bfd_size_type) (outsym - finfo->outsyms)))
4729 obj_raw_syment_count (output_bfd) +=
4730 (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
4735 /* Handle a link order which is supposed to generate a reloc. */
4738 xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
4740 struct xcoff_final_link_info *finfo;
4741 asection *output_section;
4742 struct bfd_link_order *link_order;
4744 reloc_howto_type *howto;
4745 struct xcoff_link_hash_entry *h;
4749 struct internal_reloc *irel;
4750 struct xcoff_link_hash_entry **rel_hash_ptr;
4751 struct internal_ldrel ldrel;
4753 if (link_order->type == bfd_section_reloc_link_order)
4755 /* We need to somehow locate a symbol in the right section. The
4756 symbol must either have a value of zero, or we must adjust
4757 the addend by the value of the symbol. FIXME: Write this
4758 when we need it. The old linker couldn't handle this anyhow. */
4762 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
4765 bfd_set_error (bfd_error_bad_value);
4769 h = xcoff_link_hash_lookup (xcoff_hash_table (finfo->info),
4770 link_order->u.reloc.p->u.name,
4771 false, false, true);
4774 if (! ((*finfo->info->callbacks->unattached_reloc)
4775 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
4776 (asection *) NULL, (bfd_vma) 0)))
4781 if (h->root.type == bfd_link_hash_common)
4783 hsec = h->root.u.c.p->section;
4786 else if (h->root.type == bfd_link_hash_defined
4787 || h->root.type == bfd_link_hash_defweak)
4789 hsec = h->root.u.def.section;
4790 hval = h->root.u.def.value;
4798 addend = link_order->u.reloc.p->addend;
4800 addend += (hsec->output_section->vma
4801 + hsec->output_offset
4808 bfd_reloc_status_type rstat;
4811 size = bfd_get_reloc_size (howto);
4812 buf = (bfd_byte *) bfd_zmalloc (size);
4815 bfd_set_error (bfd_error_no_memory);
4819 rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
4825 case bfd_reloc_outofrange:
4827 case bfd_reloc_overflow:
4828 if (! ((*finfo->info->callbacks->reloc_overflow)
4829 (finfo->info, link_order->u.reloc.p->u.name,
4830 howto->name, addend, (bfd *) NULL, (asection *) NULL,
4838 ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
4839 (file_ptr) link_order->offset, size);
4845 /* Store the reloc information in the right place. It will get
4846 swapped and written out at the end of the final_link routine. */
4848 irel = (finfo->section_info[output_section->target_index].relocs
4849 + output_section->reloc_count);
4850 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
4851 + output_section->reloc_count);
4853 memset (irel, 0, sizeof (struct internal_reloc));
4854 *rel_hash_ptr = NULL;
4856 irel->r_vaddr = output_section->vma + link_order->offset;
4859 irel->r_symndx = h->indx;
4862 /* Set the index to -2 to force this symbol to get written out. */
4868 irel->r_type = howto->type;
4869 irel->r_size = howto->bitsize - 1;
4870 if (howto->complain_on_overflow == complain_overflow_signed)
4871 irel->r_size |= 0x80;
4873 ++output_section->reloc_count;
4875 /* Now output the reloc to the .loader section. */
4877 ldrel.l_vaddr = irel->r_vaddr;
4881 const char *secname;
4883 secname = hsec->output_section->name;
4885 if (strcmp (secname, ".text") == 0)
4887 else if (strcmp (secname, ".data") == 0)
4889 else if (strcmp (secname, ".bss") == 0)
4893 (*_bfd_error_handler)
4894 ("%s: loader reloc in unrecognized section `%s'",
4895 bfd_get_filename (output_bfd), secname);
4896 bfd_set_error (bfd_error_nonrepresentable_section);
4904 (*_bfd_error_handler)
4905 ("%s: `%s' in loader reloc but not loader sym",
4906 bfd_get_filename (output_bfd),
4907 h->root.root.string);
4908 bfd_set_error (bfd_error_bad_value);
4911 ldrel.l_symndx = h->ldindx;
4914 ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
4915 ldrel.l_rsecnm = output_section->target_index;
4916 xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
4922 /* Sort relocs by VMA. This is called via qsort. */
4925 xcoff_sort_relocs (p1, p2)
4929 const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
4930 const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
4932 if (r1->r_vaddr > r2->r_vaddr)
4934 else if (r1->r_vaddr < r2->r_vaddr)
4940 /* This is the relocation function for the RS/6000/POWER/PowerPC.
4941 This is currently the only processor which uses XCOFF; I hope that
4942 will never change. */
4945 _bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd,
4946 input_section, contents, relocs, syms,
4949 struct bfd_link_info *info;
4951 asection *input_section;
4953 struct internal_reloc *relocs;
4954 struct internal_syment *syms;
4955 asection **sections;
4957 struct internal_reloc *rel;
4958 struct internal_reloc *relend;
4961 relend = rel + input_section->reloc_count;
4962 for (; rel < relend; rel++)
4965 struct xcoff_link_hash_entry *h;
4966 struct internal_syment *sym;
4969 struct reloc_howto_struct howto;
4970 bfd_reloc_status_type rstat;
4972 /* Relocation type R_REF is a special relocation type which is
4973 merely used to prevent garbage collection from occurring for
4974 the csect including the symbol which it references. */
4975 if (rel->r_type == R_REF)
4978 symndx = rel->r_symndx;
4988 h = obj_xcoff_sym_hashes (input_bfd)[symndx];
4989 sym = syms + symndx;
4990 addend = - sym->n_value;
4993 /* We build the howto information on the fly. */
4995 howto.type = rel->r_type;
4996 howto.rightshift = 0;
4998 howto.bitsize = (rel->r_size & 0x1f) + 1;
4999 howto.pc_relative = false;
5001 if ((rel->r_size & 0x80) != 0)
5002 howto.complain_on_overflow = complain_overflow_signed;
5004 howto.complain_on_overflow = complain_overflow_bitfield;
5005 howto.special_function = NULL;
5006 howto.name = "internal";
5007 howto.partial_inplace = true;
5008 if (howto.bitsize == 32)
5009 howto.src_mask = howto.dst_mask = 0xffffffff;
5012 howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1;
5013 if (howto.bitsize == 16)
5016 howto.pcrel_offset = false;
5026 sec = bfd_abs_section_ptr;
5031 sec = sections[symndx];
5032 val = (sec->output_section->vma
5033 + sec->output_offset
5040 if (h->root.type == bfd_link_hash_defined
5041 || h->root.type == bfd_link_hash_defweak)
5045 sec = h->root.u.def.section;
5046 val = (h->root.u.def.value
5047 + sec->output_section->vma
5048 + sec->output_offset);
5050 else if (h->root.type == bfd_link_hash_common)
5054 sec = h->root.u.c.p->section;
5055 val = (sec->output_section->vma
5056 + sec->output_offset);
5058 else if ((h->flags & XCOFF_REF_DYNAMIC) != 0
5059 || (h->flags & XCOFF_IMPORT) != 0)
5061 /* Every symbol in a shared object is defined somewhere. */
5064 else if (! info->relocateable)
5066 if (! ((*info->callbacks->undefined_symbol)
5067 (info, h->root.root.string, input_bfd, input_section,
5068 rel->r_vaddr - input_section->vma)))
5073 /* I took the relocation type definitions from two documents:
5074 the PowerPC AIX Version 4 Application Binary Interface, First
5075 Edition (April 1992), and the PowerOpen ABI, Big-Endian
5076 32-Bit Hardware Implementation (June 30, 1994). Differences
5077 between the documents are noted below. */
5079 switch (rel->r_type)
5084 /* These relocs are defined by the PowerPC ABI to be
5085 relative branches which use half of the difference
5086 between the symbol and the program counter. I can't
5087 quite figure out when this is useful. These relocs are
5088 not defined by the PowerOpen ABI. */
5090 (*_bfd_error_handler)
5091 ("%s: unsupported relocation type 0x%02x",
5092 bfd_get_filename (input_bfd), (unsigned int) rel->r_type);
5093 bfd_set_error (bfd_error_bad_value);
5096 /* Simple positive relocation. */
5099 /* Simple negative relocation. */
5103 /* Simple PC relative relocation. */
5104 howto.pc_relative = true;
5107 /* TOC relative relocation. The value in the instruction in
5108 the input file is the offset from the input file TOC to
5109 the desired location. We want the offset from the final
5110 TOC to the desired location. We have:
5115 so we must change insn by on - in.
5118 /* Global linkage relocation. The value of this relocation
5119 is the address of the entry in the TOC section. */
5121 /* Local object TOC address. I can't figure out the
5122 difference between this and case R_GL. */
5124 /* TOC relative relocation. A TOC relative load instruction
5125 which may be changed to a load address instruction.
5126 FIXME: We don't currently implement this optimization. */
5128 /* TOC relative relocation. This is a TOC relative load
5129 address instruction which may be changed to a load
5130 instruction. FIXME: I don't know if this is the correct
5132 if (h != NULL && h->toc_section == NULL)
5134 (*_bfd_error_handler)
5135 ("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry",
5136 bfd_get_filename (input_bfd), rel->r_vaddr,
5137 h->root.root.string);
5138 bfd_set_error (bfd_error_bad_value);
5143 BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
5144 val = (h->toc_section->output_section->vma
5145 + h->toc_section->output_offset);
5147 val = ((val - xcoff_data (output_bfd)->toc)
5148 - (sym->n_value - xcoff_data (input_bfd)->toc));
5152 /* Absolute branch. We don't want to mess with the lower
5153 two bits of the instruction. */
5155 /* The PowerPC ABI defines this as an absolute call which
5156 may be modified to become a relative call. The PowerOpen
5157 ABI does not define this relocation type. */
5159 /* Absolute branch which may be modified to become a
5162 /* The PowerPC ABI defines this as an absolute branch to a
5163 fixed address which may be modified to an absolute branch
5164 to a symbol. The PowerOpen ABI does not define this
5167 /* The PowerPC ABI defines this as an absolute branch to a
5168 fixed address which may be modified to a relative branch.
5169 The PowerOpen ABI does not define this relocation type. */
5170 howto.src_mask &= ~3;
5171 howto.dst_mask = howto.src_mask;
5174 /* Relative branch. We don't want to mess with the lower
5175 two bits of the instruction. */
5177 /* The PowerPC ABI defines this as a relative call which may
5178 be modified to become an absolute call. The PowerOpen
5179 ABI does not define this relocation type. */
5181 /* A relative branch which may be modified to become an
5182 absolute branch. FIXME: We don't implement this,
5183 although we should for symbols of storage mapping class
5185 howto.pc_relative = true;
5186 howto.src_mask &= ~3;
5187 howto.dst_mask = howto.src_mask;
5190 /* The PowerPC AIX ABI describes this as a load which may be
5191 changed to a load address. The PowerOpen ABI says this
5192 is the same as case R_POS. */
5195 /* The PowerPC AIX ABI describes this as a load address
5196 which may be changed to a load. The PowerOpen ABI says
5197 this is the same as R_POS. */
5201 /* If we see an R_BR or R_RBR reloc which is jumping to global
5202 linkage code, and it is followed by an appropriate cror nop
5203 instruction, we replace the cror with lwz r2,20(r1). This
5204 restores the TOC after the glink code. Contrariwise, if the
5205 call is followed by a lwz r2,20(r1), but the call is not
5206 going to global linkage code, we can replace the load with a
5208 if ((rel->r_type == R_BR || rel->r_type == R_RBR)
5210 && h->root.type == bfd_link_hash_defined
5211 && (rel->r_vaddr - input_section->vma + 8
5212 <= input_section->_cooked_size))
5217 pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
5218 next = bfd_get_32 (input_bfd, pnext);
5219 if (h->smclas == XMC_GL)
5221 if (next == 0x4def7b82 /* cror 15,15,15 */
5222 || next == 0x4ffffb82) /* cror 31,31,31 */
5223 bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
5227 if (next == 0x80410014) /* lwz r1,20(r1) */
5228 bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */
5232 /* A PC relative reloc includes the section address. */
5233 if (howto.pc_relative)
5234 addend += input_section->vma;
5236 rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section,
5238 rel->r_vaddr - input_section->vma,
5247 case bfd_reloc_overflow:
5250 char buf[SYMNMLEN + 1];
5251 char howto_name[10];
5256 name = h->root.root.string;
5259 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
5263 sprintf (howto_name, "0x%02x", rel->r_type);
5265 if (! ((*info->callbacks->reloc_overflow)
5266 (info, name, howto_name, (bfd_vma) 0, input_bfd,
5267 input_section, rel->r_vaddr - input_section->vma)))