1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
46 static bfd_boolean prep_headers (bfd *);
47 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
48 static bfd_boolean elfcore_read_notes (bfd *, file_ptr, bfd_size_type) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd *abfd,
58 const Elf_External_Verdef *src,
59 Elf_Internal_Verdef *dst)
61 dst->vd_version = H_GET_16 (abfd, src->vd_version);
62 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
63 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
64 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
65 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
66 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
67 dst->vd_next = H_GET_32 (abfd, src->vd_next);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd *abfd,
74 const Elf_Internal_Verdef *src,
75 Elf_External_Verdef *dst)
77 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
78 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
79 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
80 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
81 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
82 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
83 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd *abfd,
90 const Elf_External_Verdaux *src,
91 Elf_Internal_Verdaux *dst)
93 dst->vda_name = H_GET_32 (abfd, src->vda_name);
94 dst->vda_next = H_GET_32 (abfd, src->vda_next);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd *abfd,
101 const Elf_Internal_Verdaux *src,
102 Elf_External_Verdaux *dst)
104 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
105 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd *abfd,
112 const Elf_External_Verneed *src,
113 Elf_Internal_Verneed *dst)
115 dst->vn_version = H_GET_16 (abfd, src->vn_version);
116 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
117 dst->vn_file = H_GET_32 (abfd, src->vn_file);
118 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
119 dst->vn_next = H_GET_32 (abfd, src->vn_next);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd *abfd,
126 const Elf_Internal_Verneed *src,
127 Elf_External_Verneed *dst)
129 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
130 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
131 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
132 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
133 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd *abfd,
140 const Elf_External_Vernaux *src,
141 Elf_Internal_Vernaux *dst)
143 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
144 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
145 dst->vna_other = H_GET_16 (abfd, src->vna_other);
146 dst->vna_name = H_GET_32 (abfd, src->vna_name);
147 dst->vna_next = H_GET_32 (abfd, src->vna_next);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd *abfd,
154 const Elf_Internal_Vernaux *src,
155 Elf_External_Vernaux *dst)
157 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
158 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
159 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
160 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
161 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd *abfd,
168 const Elf_External_Versym *src,
169 Elf_Internal_Versym *dst)
171 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd *abfd,
178 const Elf_Internal_Versym *src,
179 Elf_External_Versym *dst)
181 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg)
190 const unsigned char *name = (const unsigned char *) namearg;
195 while ((ch = *name++) != '\0')
198 if ((g = (h & 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h & 0xffffffff;
210 bfd_elf_mkobject (bfd *abfd)
212 /* This just does initialization. */
213 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
214 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
215 if (elf_tdata (abfd) == 0)
217 /* Since everything is done at close time, do we need any
224 bfd_elf_mkcorefile (bfd *abfd)
226 /* I think this can be done just like an object file. */
227 return bfd_elf_mkobject (abfd);
231 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
233 Elf_Internal_Shdr **i_shdrp;
234 bfd_byte *shstrtab = NULL;
236 bfd_size_type shstrtabsize;
238 i_shdrp = elf_elfsections (abfd);
239 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
242 shstrtab = i_shdrp[shindex]->contents;
243 if (shstrtab == NULL)
245 /* No cached one, attempt to read, and cache what we read. */
246 offset = i_shdrp[shindex]->sh_offset;
247 shstrtabsize = i_shdrp[shindex]->sh_size;
249 /* Allocate and clear an extra byte at the end, to prevent crashes
250 in case the string table is not terminated. */
251 if (shstrtabsize + 1 == 0
252 || (shstrtab = bfd_alloc (abfd, shstrtabsize + 1)) == NULL
253 || bfd_seek (abfd, offset, SEEK_SET) != 0)
255 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
257 if (bfd_get_error () != bfd_error_system_call)
258 bfd_set_error (bfd_error_file_truncated);
262 shstrtab[shstrtabsize] = '\0';
263 i_shdrp[shindex]->contents = shstrtab;
265 return (char *) shstrtab;
269 bfd_elf_string_from_elf_section (bfd *abfd,
270 unsigned int shindex,
271 unsigned int strindex)
273 Elf_Internal_Shdr *hdr;
278 hdr = elf_elfsections (abfd)[shindex];
280 if (hdr->contents == NULL
281 && bfd_elf_get_str_section (abfd, shindex) == NULL)
284 if (strindex >= hdr->sh_size)
286 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
287 (*_bfd_error_handler)
288 (_("%B: invalid string offset %u >= %lu for section `%s'"),
289 abfd, strindex, (unsigned long) hdr->sh_size,
290 (shindex == shstrndx && strindex == hdr->sh_name
292 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
296 return ((char *) hdr->contents) + strindex;
299 /* Read and convert symbols to internal format.
300 SYMCOUNT specifies the number of symbols to read, starting from
301 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
302 are non-NULL, they are used to store the internal symbols, external
303 symbols, and symbol section index extensions, respectively. */
306 bfd_elf_get_elf_syms (bfd *ibfd,
307 Elf_Internal_Shdr *symtab_hdr,
310 Elf_Internal_Sym *intsym_buf,
312 Elf_External_Sym_Shndx *extshndx_buf)
314 Elf_Internal_Shdr *shndx_hdr;
316 const bfd_byte *esym;
317 Elf_External_Sym_Shndx *alloc_extshndx;
318 Elf_External_Sym_Shndx *shndx;
319 Elf_Internal_Sym *isym;
320 Elf_Internal_Sym *isymend;
321 const struct elf_backend_data *bed;
329 /* Normal syms might have section extension entries. */
331 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
332 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
334 /* Read the symbols. */
336 alloc_extshndx = NULL;
337 bed = get_elf_backend_data (ibfd);
338 extsym_size = bed->s->sizeof_sym;
339 amt = symcount * extsym_size;
340 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
341 if (extsym_buf == NULL)
343 alloc_ext = bfd_malloc2 (symcount, extsym_size);
344 extsym_buf = alloc_ext;
346 if (extsym_buf == NULL
347 || bfd_seek (ibfd, pos, SEEK_SET) != 0
348 || bfd_bread (extsym_buf, amt, ibfd) != amt)
354 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
358 amt = symcount * sizeof (Elf_External_Sym_Shndx);
359 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
360 if (extshndx_buf == NULL)
362 alloc_extshndx = bfd_malloc2 (symcount,
363 sizeof (Elf_External_Sym_Shndx));
364 extshndx_buf = alloc_extshndx;
366 if (extshndx_buf == NULL
367 || bfd_seek (ibfd, pos, SEEK_SET) != 0
368 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
375 if (intsym_buf == NULL)
377 intsym_buf = bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
378 if (intsym_buf == NULL)
382 /* Convert the symbols to internal form. */
383 isymend = intsym_buf + symcount;
384 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
386 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
387 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
390 if (alloc_ext != NULL)
392 if (alloc_extshndx != NULL)
393 free (alloc_extshndx);
398 /* Look up a symbol name. */
400 bfd_elf_sym_name (bfd *abfd,
401 Elf_Internal_Shdr *symtab_hdr,
402 Elf_Internal_Sym *isym,
406 unsigned int iname = isym->st_name;
407 unsigned int shindex = symtab_hdr->sh_link;
409 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
410 /* Check for a bogus st_shndx to avoid crashing. */
411 && isym->st_shndx < elf_numsections (abfd)
412 && !(isym->st_shndx >= SHN_LORESERVE && isym->st_shndx <= SHN_HIRESERVE))
414 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
415 shindex = elf_elfheader (abfd)->e_shstrndx;
418 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
421 else if (sym_sec && *name == '\0')
422 name = bfd_section_name (abfd, sym_sec);
427 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
428 sections. The first element is the flags, the rest are section
431 typedef union elf_internal_group {
432 Elf_Internal_Shdr *shdr;
434 } Elf_Internal_Group;
436 /* Return the name of the group signature symbol. Why isn't the
437 signature just a string? */
440 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
442 Elf_Internal_Shdr *hdr;
443 unsigned char esym[sizeof (Elf64_External_Sym)];
444 Elf_External_Sym_Shndx eshndx;
445 Elf_Internal_Sym isym;
447 /* First we need to ensure the symbol table is available. Make sure
448 that it is a symbol table section. */
449 hdr = elf_elfsections (abfd) [ghdr->sh_link];
450 if (hdr->sh_type != SHT_SYMTAB
451 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
454 /* Go read the symbol. */
455 hdr = &elf_tdata (abfd)->symtab_hdr;
456 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
457 &isym, esym, &eshndx) == NULL)
460 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
463 /* Set next_in_group list pointer, and group name for NEWSECT. */
466 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
468 unsigned int num_group = elf_tdata (abfd)->num_group;
470 /* If num_group is zero, read in all SHT_GROUP sections. The count
471 is set to -1 if there are no SHT_GROUP sections. */
474 unsigned int i, shnum;
476 /* First count the number of groups. If we have a SHT_GROUP
477 section with just a flag word (ie. sh_size is 4), ignore it. */
478 shnum = elf_numsections (abfd);
480 for (i = 0; i < shnum; i++)
482 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
483 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
489 num_group = (unsigned) -1;
490 elf_tdata (abfd)->num_group = num_group;
494 /* We keep a list of elf section headers for group sections,
495 so we can find them quickly. */
498 elf_tdata (abfd)->num_group = num_group;
499 elf_tdata (abfd)->group_sect_ptr
500 = bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
501 if (elf_tdata (abfd)->group_sect_ptr == NULL)
505 for (i = 0; i < shnum; i++)
507 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
508 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
511 Elf_Internal_Group *dest;
513 /* Add to list of sections. */
514 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
517 /* Read the raw contents. */
518 BFD_ASSERT (sizeof (*dest) >= 4);
519 amt = shdr->sh_size * sizeof (*dest) / 4;
520 shdr->contents = bfd_alloc2 (abfd, shdr->sh_size,
522 if (shdr->contents == NULL
523 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
524 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
528 /* Translate raw contents, a flag word followed by an
529 array of elf section indices all in target byte order,
530 to the flag word followed by an array of elf section
532 src = shdr->contents + shdr->sh_size;
533 dest = (Elf_Internal_Group *) (shdr->contents + amt);
540 idx = H_GET_32 (abfd, src);
541 if (src == shdr->contents)
544 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
545 shdr->bfd_section->flags
546 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
551 ((*_bfd_error_handler)
552 (_("%B: invalid SHT_GROUP entry"), abfd));
555 dest->shdr = elf_elfsections (abfd)[idx];
562 if (num_group != (unsigned) -1)
566 for (i = 0; i < num_group; i++)
568 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
569 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
570 unsigned int n_elt = shdr->sh_size / 4;
572 /* Look through this group's sections to see if current
573 section is a member. */
575 if ((++idx)->shdr == hdr)
579 /* We are a member of this group. Go looking through
580 other members to see if any others are linked via
582 idx = (Elf_Internal_Group *) shdr->contents;
583 n_elt = shdr->sh_size / 4;
585 if ((s = (++idx)->shdr->bfd_section) != NULL
586 && elf_next_in_group (s) != NULL)
590 /* Snarf the group name from other member, and
591 insert current section in circular list. */
592 elf_group_name (newsect) = elf_group_name (s);
593 elf_next_in_group (newsect) = elf_next_in_group (s);
594 elf_next_in_group (s) = newsect;
600 gname = group_signature (abfd, shdr);
603 elf_group_name (newsect) = gname;
605 /* Start a circular list with one element. */
606 elf_next_in_group (newsect) = newsect;
609 /* If the group section has been created, point to the
611 if (shdr->bfd_section != NULL)
612 elf_next_in_group (shdr->bfd_section) = newsect;
620 if (elf_group_name (newsect) == NULL)
622 (*_bfd_error_handler) (_("%B: no group info for section %A"),
629 _bfd_elf_setup_sections (bfd *abfd)
632 unsigned int num_group = elf_tdata (abfd)->num_group;
633 bfd_boolean result = TRUE;
636 /* Process SHF_LINK_ORDER. */
637 for (s = abfd->sections; s != NULL; s = s->next)
639 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
640 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
642 unsigned int elfsec = this_hdr->sh_link;
643 /* FIXME: The old Intel compiler and old strip/objcopy may
644 not set the sh_link or sh_info fields. Hence we could
645 get the situation where elfsec is 0. */
648 const struct elf_backend_data *bed
649 = get_elf_backend_data (abfd);
650 if (bed->link_order_error_handler)
651 bed->link_order_error_handler
652 (_("%B: warning: sh_link not set for section `%A'"),
657 this_hdr = elf_elfsections (abfd)[elfsec];
658 elf_linked_to_section (s) = this_hdr->bfd_section;
663 /* Process section groups. */
664 if (num_group == (unsigned) -1)
667 for (i = 0; i < num_group; i++)
669 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
670 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
671 unsigned int n_elt = shdr->sh_size / 4;
674 if ((++idx)->shdr->bfd_section)
675 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
676 else if (idx->shdr->sh_type == SHT_RELA
677 || idx->shdr->sh_type == SHT_REL)
678 /* We won't include relocation sections in section groups in
679 output object files. We adjust the group section size here
680 so that relocatable link will work correctly when
681 relocation sections are in section group in input object
683 shdr->bfd_section->size -= 4;
686 /* There are some unknown sections in the group. */
687 (*_bfd_error_handler)
688 (_("%B: unknown [%d] section `%s' in group [%s]"),
690 (unsigned int) idx->shdr->sh_type,
691 bfd_elf_string_from_elf_section (abfd,
692 (elf_elfheader (abfd)
695 shdr->bfd_section->name);
703 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
705 return elf_next_in_group (sec) != NULL;
708 /* Make a BFD section from an ELF section. We store a pointer to the
709 BFD section in the bfd_section field of the header. */
712 _bfd_elf_make_section_from_shdr (bfd *abfd,
713 Elf_Internal_Shdr *hdr,
719 const struct elf_backend_data *bed;
721 if (hdr->bfd_section != NULL)
723 BFD_ASSERT (strcmp (name,
724 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
728 newsect = bfd_make_section_anyway (abfd, name);
732 hdr->bfd_section = newsect;
733 elf_section_data (newsect)->this_hdr = *hdr;
734 elf_section_data (newsect)->this_idx = shindex;
736 /* Always use the real type/flags. */
737 elf_section_type (newsect) = hdr->sh_type;
738 elf_section_flags (newsect) = hdr->sh_flags;
740 newsect->filepos = hdr->sh_offset;
742 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
743 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
744 || ! bfd_set_section_alignment (abfd, newsect,
745 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
748 flags = SEC_NO_FLAGS;
749 if (hdr->sh_type != SHT_NOBITS)
750 flags |= SEC_HAS_CONTENTS;
751 if (hdr->sh_type == SHT_GROUP)
752 flags |= SEC_GROUP | SEC_EXCLUDE;
753 if ((hdr->sh_flags & SHF_ALLOC) != 0)
756 if (hdr->sh_type != SHT_NOBITS)
759 if ((hdr->sh_flags & SHF_WRITE) == 0)
760 flags |= SEC_READONLY;
761 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
763 else if ((flags & SEC_LOAD) != 0)
765 if ((hdr->sh_flags & SHF_MERGE) != 0)
768 newsect->entsize = hdr->sh_entsize;
769 if ((hdr->sh_flags & SHF_STRINGS) != 0)
770 flags |= SEC_STRINGS;
772 if (hdr->sh_flags & SHF_GROUP)
773 if (!setup_group (abfd, hdr, newsect))
775 if ((hdr->sh_flags & SHF_TLS) != 0)
776 flags |= SEC_THREAD_LOCAL;
778 if ((flags & SEC_ALLOC) == 0)
780 /* The debugging sections appear to be recognized only by name,
781 not any sort of flag. Their SEC_ALLOC bits are cleared. */
786 } debug_sections [] =
788 { "debug", 5 }, /* 'd' */
789 { NULL, 0 }, /* 'e' */
790 { NULL, 0 }, /* 'f' */
791 { "gnu.linkonce.wi.", 17 }, /* 'g' */
792 { NULL, 0 }, /* 'h' */
793 { NULL, 0 }, /* 'i' */
794 { NULL, 0 }, /* 'j' */
795 { NULL, 0 }, /* 'k' */
796 { "line", 4 }, /* 'l' */
797 { NULL, 0 }, /* 'm' */
798 { NULL, 0 }, /* 'n' */
799 { NULL, 0 }, /* 'o' */
800 { NULL, 0 }, /* 'p' */
801 { NULL, 0 }, /* 'q' */
802 { NULL, 0 }, /* 'r' */
803 { "stab", 4 } /* 's' */
808 int i = name [1] - 'd';
810 && i < (int) ARRAY_SIZE (debug_sections)
811 && debug_sections [i].name != NULL
812 && strncmp (&name [1], debug_sections [i].name,
813 debug_sections [i].len) == 0)
814 flags |= SEC_DEBUGGING;
818 /* As a GNU extension, if the name begins with .gnu.linkonce, we
819 only link a single copy of the section. This is used to support
820 g++. g++ will emit each template expansion in its own section.
821 The symbols will be defined as weak, so that multiple definitions
822 are permitted. The GNU linker extension is to actually discard
823 all but one of the sections. */
824 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
825 && elf_next_in_group (newsect) == NULL)
826 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
828 bed = get_elf_backend_data (abfd);
829 if (bed->elf_backend_section_flags)
830 if (! bed->elf_backend_section_flags (&flags, hdr))
833 if (! bfd_set_section_flags (abfd, newsect, flags))
836 if ((flags & SEC_ALLOC) != 0)
838 Elf_Internal_Phdr *phdr;
841 /* Look through the phdrs to see if we need to adjust the lma.
842 If all the p_paddr fields are zero, we ignore them, since
843 some ELF linkers produce such output. */
844 phdr = elf_tdata (abfd)->phdr;
845 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
847 if (phdr->p_paddr != 0)
850 if (i < elf_elfheader (abfd)->e_phnum)
852 phdr = elf_tdata (abfd)->phdr;
853 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
855 /* This section is part of this segment if its file
856 offset plus size lies within the segment's memory
857 span and, if the section is loaded, the extent of the
858 loaded data lies within the extent of the segment.
860 Note - we used to check the p_paddr field as well, and
861 refuse to set the LMA if it was 0. This is wrong
862 though, as a perfectly valid initialised segment can
863 have a p_paddr of zero. Some architectures, eg ARM,
864 place special significance on the address 0 and
865 executables need to be able to have a segment which
866 covers this address. */
867 if (phdr->p_type == PT_LOAD
868 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
869 && (hdr->sh_offset + hdr->sh_size
870 <= phdr->p_offset + phdr->p_memsz)
871 && ((flags & SEC_LOAD) == 0
872 || (hdr->sh_offset + hdr->sh_size
873 <= phdr->p_offset + phdr->p_filesz)))
875 if ((flags & SEC_LOAD) == 0)
876 newsect->lma = (phdr->p_paddr
877 + hdr->sh_addr - phdr->p_vaddr);
879 /* We used to use the same adjustment for SEC_LOAD
880 sections, but that doesn't work if the segment
881 is packed with code from multiple VMAs.
882 Instead we calculate the section LMA based on
883 the segment LMA. It is assumed that the
884 segment will contain sections with contiguous
885 LMAs, even if the VMAs are not. */
886 newsect->lma = (phdr->p_paddr
887 + hdr->sh_offset - phdr->p_offset);
889 /* With contiguous segments, we can't tell from file
890 offsets whether a section with zero size should
891 be placed at the end of one segment or the
892 beginning of the next. Decide based on vaddr. */
893 if (hdr->sh_addr >= phdr->p_vaddr
894 && (hdr->sh_addr + hdr->sh_size
895 <= phdr->p_vaddr + phdr->p_memsz))
910 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
913 Helper functions for GDB to locate the string tables.
914 Since BFD hides string tables from callers, GDB needs to use an
915 internal hook to find them. Sun's .stabstr, in particular,
916 isn't even pointed to by the .stab section, so ordinary
917 mechanisms wouldn't work to find it, even if we had some.
920 struct elf_internal_shdr *
921 bfd_elf_find_section (bfd *abfd, char *name)
923 Elf_Internal_Shdr **i_shdrp;
928 i_shdrp = elf_elfsections (abfd);
931 shstrtab = bfd_elf_get_str_section (abfd,
932 elf_elfheader (abfd)->e_shstrndx);
933 if (shstrtab != NULL)
935 max = elf_numsections (abfd);
936 for (i = 1; i < max; i++)
937 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
944 const char *const bfd_elf_section_type_names[] = {
945 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
946 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
947 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
950 /* ELF relocs are against symbols. If we are producing relocatable
951 output, and the reloc is against an external symbol, and nothing
952 has given us any additional addend, the resulting reloc will also
953 be against the same symbol. In such a case, we don't want to
954 change anything about the way the reloc is handled, since it will
955 all be done at final link time. Rather than put special case code
956 into bfd_perform_relocation, all the reloc types use this howto
957 function. It just short circuits the reloc if producing
958 relocatable output against an external symbol. */
960 bfd_reloc_status_type
961 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
962 arelent *reloc_entry,
964 void *data ATTRIBUTE_UNUSED,
965 asection *input_section,
967 char **error_message ATTRIBUTE_UNUSED)
969 if (output_bfd != NULL
970 && (symbol->flags & BSF_SECTION_SYM) == 0
971 && (! reloc_entry->howto->partial_inplace
972 || reloc_entry->addend == 0))
974 reloc_entry->address += input_section->output_offset;
978 return bfd_reloc_continue;
981 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
984 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
987 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
988 sec->sec_info_type = ELF_INFO_TYPE_NONE;
991 /* Finish SHF_MERGE section merging. */
994 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
999 if (!is_elf_hash_table (info->hash))
1002 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1003 if ((ibfd->flags & DYNAMIC) == 0)
1004 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
1005 if ((sec->flags & SEC_MERGE) != 0
1006 && !bfd_is_abs_section (sec->output_section))
1008 struct bfd_elf_section_data *secdata;
1010 secdata = elf_section_data (sec);
1011 if (! _bfd_add_merge_section (abfd,
1012 &elf_hash_table (info)->merge_info,
1013 sec, &secdata->sec_info))
1015 else if (secdata->sec_info)
1016 sec->sec_info_type = ELF_INFO_TYPE_MERGE;
1019 if (elf_hash_table (info)->merge_info != NULL)
1020 _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info,
1021 merge_sections_remove_hook);
1026 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
1028 sec->output_section = bfd_abs_section_ptr;
1029 sec->output_offset = sec->vma;
1030 if (!is_elf_hash_table (info->hash))
1033 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1036 /* Copy the program header and other data from one object module to
1040 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1042 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1043 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1046 BFD_ASSERT (!elf_flags_init (obfd)
1047 || (elf_elfheader (obfd)->e_flags
1048 == elf_elfheader (ibfd)->e_flags));
1050 elf_gp (obfd) = elf_gp (ibfd);
1051 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1052 elf_flags_init (obfd) = TRUE;
1056 /* Print out the program headers. */
1059 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1062 Elf_Internal_Phdr *p;
1064 bfd_byte *dynbuf = NULL;
1066 p = elf_tdata (abfd)->phdr;
1071 fprintf (f, _("\nProgram Header:\n"));
1072 c = elf_elfheader (abfd)->e_phnum;
1073 for (i = 0; i < c; i++, p++)
1080 case PT_NULL: pt = "NULL"; break;
1081 case PT_LOAD: pt = "LOAD"; break;
1082 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1083 case PT_INTERP: pt = "INTERP"; break;
1084 case PT_NOTE: pt = "NOTE"; break;
1085 case PT_SHLIB: pt = "SHLIB"; break;
1086 case PT_PHDR: pt = "PHDR"; break;
1087 case PT_TLS: pt = "TLS"; break;
1088 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1089 case PT_GNU_STACK: pt = "STACK"; break;
1090 case PT_GNU_RELRO: pt = "RELRO"; break;
1091 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1093 fprintf (f, "%8s off 0x", pt);
1094 bfd_fprintf_vma (abfd, f, p->p_offset);
1095 fprintf (f, " vaddr 0x");
1096 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1097 fprintf (f, " paddr 0x");
1098 bfd_fprintf_vma (abfd, f, p->p_paddr);
1099 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1100 fprintf (f, " filesz 0x");
1101 bfd_fprintf_vma (abfd, f, p->p_filesz);
1102 fprintf (f, " memsz 0x");
1103 bfd_fprintf_vma (abfd, f, p->p_memsz);
1104 fprintf (f, " flags %c%c%c",
1105 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1106 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1107 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1108 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1109 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1114 s = bfd_get_section_by_name (abfd, ".dynamic");
1118 unsigned long shlink;
1119 bfd_byte *extdyn, *extdynend;
1121 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1123 fprintf (f, _("\nDynamic Section:\n"));
1125 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1128 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1131 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1133 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1134 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1137 extdynend = extdyn + s->size;
1138 for (; extdyn < extdynend; extdyn += extdynsize)
1140 Elf_Internal_Dyn dyn;
1143 bfd_boolean stringp;
1145 (*swap_dyn_in) (abfd, extdyn, &dyn);
1147 if (dyn.d_tag == DT_NULL)
1154 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1158 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1159 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1160 case DT_PLTGOT: name = "PLTGOT"; break;
1161 case DT_HASH: name = "HASH"; break;
1162 case DT_STRTAB: name = "STRTAB"; break;
1163 case DT_SYMTAB: name = "SYMTAB"; break;
1164 case DT_RELA: name = "RELA"; break;
1165 case DT_RELASZ: name = "RELASZ"; break;
1166 case DT_RELAENT: name = "RELAENT"; break;
1167 case DT_STRSZ: name = "STRSZ"; break;
1168 case DT_SYMENT: name = "SYMENT"; break;
1169 case DT_INIT: name = "INIT"; break;
1170 case DT_FINI: name = "FINI"; break;
1171 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1172 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1173 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1174 case DT_REL: name = "REL"; break;
1175 case DT_RELSZ: name = "RELSZ"; break;
1176 case DT_RELENT: name = "RELENT"; break;
1177 case DT_PLTREL: name = "PLTREL"; break;
1178 case DT_DEBUG: name = "DEBUG"; break;
1179 case DT_TEXTREL: name = "TEXTREL"; break;
1180 case DT_JMPREL: name = "JMPREL"; break;
1181 case DT_BIND_NOW: name = "BIND_NOW"; break;
1182 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1183 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1184 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1185 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1186 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1187 case DT_FLAGS: name = "FLAGS"; break;
1188 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1189 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1190 case DT_CHECKSUM: name = "CHECKSUM"; break;
1191 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1192 case DT_MOVEENT: name = "MOVEENT"; break;
1193 case DT_MOVESZ: name = "MOVESZ"; break;
1194 case DT_FEATURE: name = "FEATURE"; break;
1195 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1196 case DT_SYMINSZ: name = "SYMINSZ"; break;
1197 case DT_SYMINENT: name = "SYMINENT"; break;
1198 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1199 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1200 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1201 case DT_PLTPAD: name = "PLTPAD"; break;
1202 case DT_MOVETAB: name = "MOVETAB"; break;
1203 case DT_SYMINFO: name = "SYMINFO"; break;
1204 case DT_RELACOUNT: name = "RELACOUNT"; break;
1205 case DT_RELCOUNT: name = "RELCOUNT"; break;
1206 case DT_FLAGS_1: name = "FLAGS_1"; break;
1207 case DT_VERSYM: name = "VERSYM"; break;
1208 case DT_VERDEF: name = "VERDEF"; break;
1209 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1210 case DT_VERNEED: name = "VERNEED"; break;
1211 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1212 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1213 case DT_USED: name = "USED"; break;
1214 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1217 fprintf (f, " %-11s ", name);
1219 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1223 unsigned int tagv = dyn.d_un.d_val;
1225 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1228 fprintf (f, "%s", string);
1237 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1238 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1240 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1244 if (elf_dynverdef (abfd) != 0)
1246 Elf_Internal_Verdef *t;
1248 fprintf (f, _("\nVersion definitions:\n"));
1249 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1251 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1252 t->vd_flags, t->vd_hash,
1253 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1254 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1256 Elf_Internal_Verdaux *a;
1259 for (a = t->vd_auxptr->vda_nextptr;
1263 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1269 if (elf_dynverref (abfd) != 0)
1271 Elf_Internal_Verneed *t;
1273 fprintf (f, _("\nVersion References:\n"));
1274 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1276 Elf_Internal_Vernaux *a;
1278 fprintf (f, _(" required from %s:\n"),
1279 t->vn_filename ? t->vn_filename : "<corrupt>");
1280 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1281 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1282 a->vna_flags, a->vna_other,
1283 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1295 /* Display ELF-specific fields of a symbol. */
1298 bfd_elf_print_symbol (bfd *abfd,
1301 bfd_print_symbol_type how)
1306 case bfd_print_symbol_name:
1307 fprintf (file, "%s", symbol->name);
1309 case bfd_print_symbol_more:
1310 fprintf (file, "elf ");
1311 bfd_fprintf_vma (abfd, file, symbol->value);
1312 fprintf (file, " %lx", (long) symbol->flags);
1314 case bfd_print_symbol_all:
1316 const char *section_name;
1317 const char *name = NULL;
1318 const struct elf_backend_data *bed;
1319 unsigned char st_other;
1322 section_name = symbol->section ? symbol->section->name : "(*none*)";
1324 bed = get_elf_backend_data (abfd);
1325 if (bed->elf_backend_print_symbol_all)
1326 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1330 name = symbol->name;
1331 bfd_print_symbol_vandf (abfd, file, symbol);
1334 fprintf (file, " %s\t", section_name);
1335 /* Print the "other" value for a symbol. For common symbols,
1336 we've already printed the size; now print the alignment.
1337 For other symbols, we have no specified alignment, and
1338 we've printed the address; now print the size. */
1339 if (bfd_is_com_section (symbol->section))
1340 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1342 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1343 bfd_fprintf_vma (abfd, file, val);
1345 /* If we have version information, print it. */
1346 if (elf_tdata (abfd)->dynversym_section != 0
1347 && (elf_tdata (abfd)->dynverdef_section != 0
1348 || elf_tdata (abfd)->dynverref_section != 0))
1350 unsigned int vernum;
1351 const char *version_string;
1353 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1356 version_string = "";
1357 else if (vernum == 1)
1358 version_string = "Base";
1359 else if (vernum <= elf_tdata (abfd)->cverdefs)
1361 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1364 Elf_Internal_Verneed *t;
1366 version_string = "";
1367 for (t = elf_tdata (abfd)->verref;
1371 Elf_Internal_Vernaux *a;
1373 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1375 if (a->vna_other == vernum)
1377 version_string = a->vna_nodename;
1384 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1385 fprintf (file, " %-11s", version_string);
1390 fprintf (file, " (%s)", version_string);
1391 for (i = 10 - strlen (version_string); i > 0; --i)
1396 /* If the st_other field is not zero, print it. */
1397 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1402 case STV_INTERNAL: fprintf (file, " .internal"); break;
1403 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1404 case STV_PROTECTED: fprintf (file, " .protected"); break;
1406 /* Some other non-defined flags are also present, so print
1408 fprintf (file, " 0x%02x", (unsigned int) st_other);
1411 fprintf (file, " %s", name);
1417 /* Create an entry in an ELF linker hash table. */
1419 struct bfd_hash_entry *
1420 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1421 struct bfd_hash_table *table,
1424 /* Allocate the structure if it has not already been allocated by a
1428 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1433 /* Call the allocation method of the superclass. */
1434 entry = _bfd_link_hash_newfunc (entry, table, string);
1437 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1438 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1440 /* Set local fields. */
1443 ret->got = htab->init_got_refcount;
1444 ret->plt = htab->init_plt_refcount;
1445 memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry)
1446 - offsetof (struct elf_link_hash_entry, size)));
1447 /* Assume that we have been called by a non-ELF symbol reader.
1448 This flag is then reset by the code which reads an ELF input
1449 file. This ensures that a symbol created by a non-ELF symbol
1450 reader will have the flag set correctly. */
1457 /* Copy data from an indirect symbol to its direct symbol, hiding the
1458 old indirect symbol. Also used for copying flags to a weakdef. */
1461 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1462 struct elf_link_hash_entry *dir,
1463 struct elf_link_hash_entry *ind)
1466 bfd_signed_vma lowest_valid = bed->can_refcount;
1468 /* Copy down any references that we may have already seen to the
1469 symbol which just became indirect. */
1471 dir->ref_dynamic |= ind->ref_dynamic;
1472 dir->ref_regular |= ind->ref_regular;
1473 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1474 dir->non_got_ref |= ind->non_got_ref;
1475 dir->needs_plt |= ind->needs_plt;
1476 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1478 if (ind->root.type != bfd_link_hash_indirect)
1481 /* Copy over the global and procedure linkage table refcount entries.
1482 These may have been already set up by a check_relocs routine. */
1483 tmp = dir->got.refcount;
1484 if (tmp < lowest_valid)
1486 dir->got.refcount = ind->got.refcount;
1487 ind->got.refcount = tmp;
1490 BFD_ASSERT (ind->got.refcount < lowest_valid);
1492 tmp = dir->plt.refcount;
1493 if (tmp < lowest_valid)
1495 dir->plt.refcount = ind->plt.refcount;
1496 ind->plt.refcount = tmp;
1499 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1501 if (dir->dynindx == -1)
1503 dir->dynindx = ind->dynindx;
1504 dir->dynstr_index = ind->dynstr_index;
1506 ind->dynstr_index = 0;
1509 BFD_ASSERT (ind->dynindx == -1);
1513 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1514 struct elf_link_hash_entry *h,
1515 bfd_boolean force_local)
1517 h->plt = elf_hash_table (info)->init_plt_offset;
1521 h->forced_local = 1;
1522 if (h->dynindx != -1)
1525 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1531 /* Initialize an ELF linker hash table. */
1534 _bfd_elf_link_hash_table_init
1535 (struct elf_link_hash_table *table,
1537 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1538 struct bfd_hash_table *,
1542 int can_refcount = get_elf_backend_data (abfd)->can_refcount;
1544 table->dynamic_sections_created = FALSE;
1545 table->dynobj = NULL;
1546 table->init_got_refcount.refcount = can_refcount - 1;
1547 table->init_plt_refcount.refcount = can_refcount - 1;
1548 table->init_got_offset.offset = -(bfd_vma) 1;
1549 table->init_plt_offset.offset = -(bfd_vma) 1;
1550 /* The first dynamic symbol is a dummy. */
1551 table->dynsymcount = 1;
1552 table->dynstr = NULL;
1553 table->bucketcount = 0;
1554 table->needed = NULL;
1556 table->merge_info = NULL;
1557 memset (&table->stab_info, 0, sizeof (table->stab_info));
1558 memset (&table->eh_info, 0, sizeof (table->eh_info));
1559 table->dynlocal = NULL;
1560 table->runpath = NULL;
1561 table->tls_sec = NULL;
1562 table->tls_size = 0;
1563 table->loaded = NULL;
1564 table->is_relocatable_executable = FALSE;
1566 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1567 table->root.type = bfd_link_elf_hash_table;
1572 /* Create an ELF linker hash table. */
1574 struct bfd_link_hash_table *
1575 _bfd_elf_link_hash_table_create (bfd *abfd)
1577 struct elf_link_hash_table *ret;
1578 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1580 ret = bfd_malloc (amt);
1584 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1593 /* This is a hook for the ELF emulation code in the generic linker to
1594 tell the backend linker what file name to use for the DT_NEEDED
1595 entry for a dynamic object. */
1598 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1600 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1601 && bfd_get_format (abfd) == bfd_object)
1602 elf_dt_name (abfd) = name;
1606 bfd_elf_get_dyn_lib_class (bfd *abfd)
1609 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1610 && bfd_get_format (abfd) == bfd_object)
1611 lib_class = elf_dyn_lib_class (abfd);
1618 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1620 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1621 && bfd_get_format (abfd) == bfd_object)
1622 elf_dyn_lib_class (abfd) = lib_class;
1625 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1626 the linker ELF emulation code. */
1628 struct bfd_link_needed_list *
1629 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1630 struct bfd_link_info *info)
1632 if (! is_elf_hash_table (info->hash))
1634 return elf_hash_table (info)->needed;
1637 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1638 hook for the linker ELF emulation code. */
1640 struct bfd_link_needed_list *
1641 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1642 struct bfd_link_info *info)
1644 if (! is_elf_hash_table (info->hash))
1646 return elf_hash_table (info)->runpath;
1649 /* Get the name actually used for a dynamic object for a link. This
1650 is the SONAME entry if there is one. Otherwise, it is the string
1651 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1654 bfd_elf_get_dt_soname (bfd *abfd)
1656 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1657 && bfd_get_format (abfd) == bfd_object)
1658 return elf_dt_name (abfd);
1662 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1663 the ELF linker emulation code. */
1666 bfd_elf_get_bfd_needed_list (bfd *abfd,
1667 struct bfd_link_needed_list **pneeded)
1670 bfd_byte *dynbuf = NULL;
1672 unsigned long shlink;
1673 bfd_byte *extdyn, *extdynend;
1675 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1679 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1680 || bfd_get_format (abfd) != bfd_object)
1683 s = bfd_get_section_by_name (abfd, ".dynamic");
1684 if (s == NULL || s->size == 0)
1687 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1690 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1694 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1696 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1697 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1700 extdynend = extdyn + s->size;
1701 for (; extdyn < extdynend; extdyn += extdynsize)
1703 Elf_Internal_Dyn dyn;
1705 (*swap_dyn_in) (abfd, extdyn, &dyn);
1707 if (dyn.d_tag == DT_NULL)
1710 if (dyn.d_tag == DT_NEEDED)
1713 struct bfd_link_needed_list *l;
1714 unsigned int tagv = dyn.d_un.d_val;
1717 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1722 l = bfd_alloc (abfd, amt);
1743 /* Allocate an ELF string table--force the first byte to be zero. */
1745 struct bfd_strtab_hash *
1746 _bfd_elf_stringtab_init (void)
1748 struct bfd_strtab_hash *ret;
1750 ret = _bfd_stringtab_init ();
1755 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1756 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1757 if (loc == (bfd_size_type) -1)
1759 _bfd_stringtab_free (ret);
1766 /* ELF .o/exec file reading */
1768 /* Create a new bfd section from an ELF section header. */
1771 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1773 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1774 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1775 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1778 name = bfd_elf_string_from_elf_section (abfd,
1779 elf_elfheader (abfd)->e_shstrndx,
1784 switch (hdr->sh_type)
1787 /* Inactive section. Throw it away. */
1790 case SHT_PROGBITS: /* Normal section with contents. */
1791 case SHT_NOBITS: /* .bss section. */
1792 case SHT_HASH: /* .hash section. */
1793 case SHT_NOTE: /* .note section. */
1794 case SHT_INIT_ARRAY: /* .init_array section. */
1795 case SHT_FINI_ARRAY: /* .fini_array section. */
1796 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1797 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1798 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1800 case SHT_DYNAMIC: /* Dynamic linking information. */
1801 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1803 if (hdr->sh_link > elf_numsections (abfd)
1804 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1806 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1808 Elf_Internal_Shdr *dynsymhdr;
1810 /* The shared libraries distributed with hpux11 have a bogus
1811 sh_link field for the ".dynamic" section. Find the
1812 string table for the ".dynsym" section instead. */
1813 if (elf_dynsymtab (abfd) != 0)
1815 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1816 hdr->sh_link = dynsymhdr->sh_link;
1820 unsigned int i, num_sec;
1822 num_sec = elf_numsections (abfd);
1823 for (i = 1; i < num_sec; i++)
1825 dynsymhdr = elf_elfsections (abfd)[i];
1826 if (dynsymhdr->sh_type == SHT_DYNSYM)
1828 hdr->sh_link = dynsymhdr->sh_link;
1836 case SHT_SYMTAB: /* A symbol table */
1837 if (elf_onesymtab (abfd) == shindex)
1840 if (hdr->sh_entsize != bed->s->sizeof_sym)
1842 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1843 elf_onesymtab (abfd) = shindex;
1844 elf_tdata (abfd)->symtab_hdr = *hdr;
1845 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1846 abfd->flags |= HAS_SYMS;
1848 /* Sometimes a shared object will map in the symbol table. If
1849 SHF_ALLOC is set, and this is a shared object, then we also
1850 treat this section as a BFD section. We can not base the
1851 decision purely on SHF_ALLOC, because that flag is sometimes
1852 set in a relocatable object file, which would confuse the
1854 if ((hdr->sh_flags & SHF_ALLOC) != 0
1855 && (abfd->flags & DYNAMIC) != 0
1856 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1860 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1861 can't read symbols without that section loaded as well. It
1862 is most likely specified by the next section header. */
1863 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1865 unsigned int i, num_sec;
1867 num_sec = elf_numsections (abfd);
1868 for (i = shindex + 1; i < num_sec; i++)
1870 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1871 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1872 && hdr2->sh_link == shindex)
1876 for (i = 1; i < shindex; i++)
1878 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1879 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1880 && hdr2->sh_link == shindex)
1884 return bfd_section_from_shdr (abfd, i);
1888 case SHT_DYNSYM: /* A dynamic symbol table */
1889 if (elf_dynsymtab (abfd) == shindex)
1892 if (hdr->sh_entsize != bed->s->sizeof_sym)
1894 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1895 elf_dynsymtab (abfd) = shindex;
1896 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1897 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1898 abfd->flags |= HAS_SYMS;
1900 /* Besides being a symbol table, we also treat this as a regular
1901 section, so that objcopy can handle it. */
1902 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1904 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1905 if (elf_symtab_shndx (abfd) == shindex)
1908 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1909 elf_symtab_shndx (abfd) = shindex;
1910 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1911 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1914 case SHT_STRTAB: /* A string table */
1915 if (hdr->bfd_section != NULL)
1917 if (ehdr->e_shstrndx == shindex)
1919 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1920 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1923 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1926 elf_tdata (abfd)->strtab_hdr = *hdr;
1927 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1930 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1933 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1934 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1935 elf_elfsections (abfd)[shindex] = hdr;
1936 /* We also treat this as a regular section, so that objcopy
1938 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1942 /* If the string table isn't one of the above, then treat it as a
1943 regular section. We need to scan all the headers to be sure,
1944 just in case this strtab section appeared before the above. */
1945 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1947 unsigned int i, num_sec;
1949 num_sec = elf_numsections (abfd);
1950 for (i = 1; i < num_sec; i++)
1952 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1953 if (hdr2->sh_link == shindex)
1955 /* Prevent endless recursion on broken objects. */
1958 if (! bfd_section_from_shdr (abfd, i))
1960 if (elf_onesymtab (abfd) == i)
1962 if (elf_dynsymtab (abfd) == i)
1963 goto dynsymtab_strtab;
1967 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1971 /* *These* do a lot of work -- but build no sections! */
1973 asection *target_sect;
1974 Elf_Internal_Shdr *hdr2;
1975 unsigned int num_sec = elf_numsections (abfd);
1978 != (bfd_size_type) (hdr->sh_type == SHT_REL
1979 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1982 /* Check for a bogus link to avoid crashing. */
1983 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1984 || hdr->sh_link >= num_sec)
1986 ((*_bfd_error_handler)
1987 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1988 abfd, hdr->sh_link, name, shindex));
1989 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1993 /* For some incomprehensible reason Oracle distributes
1994 libraries for Solaris in which some of the objects have
1995 bogus sh_link fields. It would be nice if we could just
1996 reject them, but, unfortunately, some people need to use
1997 them. We scan through the section headers; if we find only
1998 one suitable symbol table, we clobber the sh_link to point
1999 to it. I hope this doesn't break anything. */
2000 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
2001 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2007 for (scan = 1; scan < num_sec; scan++)
2009 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2010 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2021 hdr->sh_link = found;
2024 /* Get the symbol table. */
2025 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2026 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2027 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2030 /* If this reloc section does not use the main symbol table we
2031 don't treat it as a reloc section. BFD can't adequately
2032 represent such a section, so at least for now, we don't
2033 try. We just present it as a normal section. We also
2034 can't use it as a reloc section if it points to the null
2036 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
2037 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2040 /* Prevent endless recursion on broken objects. */
2041 if (elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2042 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2044 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2046 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2047 if (target_sect == NULL)
2050 if ((target_sect->flags & SEC_RELOC) == 0
2051 || target_sect->reloc_count == 0)
2052 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2056 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2057 amt = sizeof (*hdr2);
2058 hdr2 = bfd_alloc (abfd, amt);
2059 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2062 elf_elfsections (abfd)[shindex] = hdr2;
2063 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2064 target_sect->flags |= SEC_RELOC;
2065 target_sect->relocation = NULL;
2066 target_sect->rel_filepos = hdr->sh_offset;
2067 /* In the section to which the relocations apply, mark whether
2068 its relocations are of the REL or RELA variety. */
2069 if (hdr->sh_size != 0)
2070 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2071 abfd->flags |= HAS_RELOC;
2076 case SHT_GNU_verdef:
2077 elf_dynverdef (abfd) = shindex;
2078 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2079 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2082 case SHT_GNU_versym:
2083 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2085 elf_dynversym (abfd) = shindex;
2086 elf_tdata (abfd)->dynversym_hdr = *hdr;
2087 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2090 case SHT_GNU_verneed:
2091 elf_dynverref (abfd) = shindex;
2092 elf_tdata (abfd)->dynverref_hdr = *hdr;
2093 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2100 /* We need a BFD section for objcopy and relocatable linking,
2101 and it's handy to have the signature available as the section
2103 if (hdr->sh_entsize != GRP_ENTRY_SIZE)
2105 name = group_signature (abfd, hdr);
2108 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2110 if (hdr->contents != NULL)
2112 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2113 unsigned int n_elt = hdr->sh_size / 4;
2116 if (idx->flags & GRP_COMDAT)
2117 hdr->bfd_section->flags
2118 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2120 /* We try to keep the same section order as it comes in. */
2122 while (--n_elt != 0)
2123 if ((s = (--idx)->shdr->bfd_section) != NULL
2124 && elf_next_in_group (s) != NULL)
2126 elf_next_in_group (hdr->bfd_section) = s;
2133 /* Check for any processor-specific section types. */
2134 return bed->elf_backend_section_from_shdr (abfd, hdr, name,
2141 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2142 Return SEC for sections that have no elf section, and NULL on error. */
2145 bfd_section_from_r_symndx (bfd *abfd,
2146 struct sym_sec_cache *cache,
2148 unsigned long r_symndx)
2150 Elf_Internal_Shdr *symtab_hdr;
2151 unsigned char esym[sizeof (Elf64_External_Sym)];
2152 Elf_External_Sym_Shndx eshndx;
2153 Elf_Internal_Sym isym;
2154 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2156 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2157 return cache->sec[ent];
2159 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2160 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2161 &isym, esym, &eshndx) == NULL)
2164 if (cache->abfd != abfd)
2166 memset (cache->indx, -1, sizeof (cache->indx));
2169 cache->indx[ent] = r_symndx;
2170 cache->sec[ent] = sec;
2171 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2172 || isym.st_shndx > SHN_HIRESERVE)
2175 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2177 cache->sec[ent] = s;
2179 return cache->sec[ent];
2182 /* Given an ELF section number, retrieve the corresponding BFD
2186 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2188 if (index >= elf_numsections (abfd))
2190 return elf_elfsections (abfd)[index]->bfd_section;
2193 static const struct bfd_elf_special_section special_sections_b[] =
2195 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2196 { NULL, 0, 0, 0, 0 }
2199 static const struct bfd_elf_special_section special_sections_c[] =
2201 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2202 { NULL, 0, 0, 0, 0 }
2205 static const struct bfd_elf_special_section special_sections_d[] =
2207 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2208 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2209 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2210 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2211 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2212 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2213 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2214 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2215 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2216 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2217 { NULL, 0, 0, 0, 0 }
2220 static const struct bfd_elf_special_section special_sections_f[] =
2222 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2223 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2224 { NULL, 0, 0, 0, 0 }
2227 static const struct bfd_elf_special_section special_sections_g[] =
2229 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2230 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2231 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2232 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2233 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2234 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2235 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2236 { NULL, 0, 0, 0, 0 }
2239 static const struct bfd_elf_special_section special_sections_h[] =
2241 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2242 { NULL, 0, 0, 0, 0 }
2245 static const struct bfd_elf_special_section special_sections_i[] =
2247 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2248 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2249 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2250 { NULL, 0, 0, 0, 0 }
2253 static const struct bfd_elf_special_section special_sections_l[] =
2255 { ".line", 5, 0, SHT_PROGBITS, 0 },
2256 { NULL, 0, 0, 0, 0 }
2259 static const struct bfd_elf_special_section special_sections_n[] =
2261 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2262 { ".note", 5, -1, SHT_NOTE, 0 },
2263 { NULL, 0, 0, 0, 0 }
2266 static const struct bfd_elf_special_section special_sections_p[] =
2268 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2269 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2270 { NULL, 0, 0, 0, 0 }
2273 static const struct bfd_elf_special_section special_sections_r[] =
2275 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2276 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2277 { ".rela", 5, -1, SHT_RELA, 0 },
2278 { ".rel", 4, -1, SHT_REL, 0 },
2279 { NULL, 0, 0, 0, 0 }
2282 static const struct bfd_elf_special_section special_sections_s[] =
2284 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2285 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2286 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2287 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2288 { NULL, 0, 0, 0, 0 }
2291 static const struct bfd_elf_special_section special_sections_t[] =
2293 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2294 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2295 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2296 { NULL, 0, 0, 0, 0 }
2299 static const struct bfd_elf_special_section *special_sections[] =
2301 special_sections_b, /* 'b' */
2302 special_sections_c, /* 'b' */
2303 special_sections_d, /* 'd' */
2305 special_sections_f, /* 'f' */
2306 special_sections_g, /* 'g' */
2307 special_sections_h, /* 'h' */
2308 special_sections_i, /* 'i' */
2311 special_sections_l, /* 'l' */
2313 special_sections_n, /* 'n' */
2315 special_sections_p, /* 'p' */
2317 special_sections_r, /* 'r' */
2318 special_sections_s, /* 's' */
2319 special_sections_t, /* 't' */
2322 const struct bfd_elf_special_section *
2323 _bfd_elf_get_special_section (const char *name,
2324 const struct bfd_elf_special_section *spec,
2330 len = strlen (name);
2332 for (i = 0; spec[i].prefix != NULL; i++)
2335 int prefix_len = spec[i].prefix_length;
2337 if (len < prefix_len)
2339 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2342 suffix_len = spec[i].suffix_length;
2343 if (suffix_len <= 0)
2345 if (name[prefix_len] != 0)
2347 if (suffix_len == 0)
2349 if (name[prefix_len] != '.'
2350 && (suffix_len == -2
2351 || (rela && spec[i].type == SHT_REL)))
2357 if (len < prefix_len + suffix_len)
2359 if (memcmp (name + len - suffix_len,
2360 spec[i].prefix + prefix_len,
2370 const struct bfd_elf_special_section *
2371 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2374 const struct bfd_elf_special_section *spec;
2375 const struct elf_backend_data *bed;
2377 /* See if this is one of the special sections. */
2378 if (sec->name == NULL)
2381 bed = get_elf_backend_data (abfd);
2382 spec = bed->special_sections;
2385 spec = _bfd_elf_get_special_section (sec->name,
2386 bed->special_sections,
2392 if (sec->name[0] != '.')
2395 i = sec->name[1] - 'b';
2396 if (i < 0 || i > 't' - 'b')
2399 spec = special_sections[i];
2404 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2408 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2410 struct bfd_elf_section_data *sdata;
2411 const struct elf_backend_data *bed;
2412 const struct bfd_elf_special_section *ssect;
2414 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2417 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2420 sec->used_by_bfd = sdata;
2423 /* Indicate whether or not this section should use RELA relocations. */
2424 bed = get_elf_backend_data (abfd);
2425 sec->use_rela_p = bed->default_use_rela_p;
2427 /* When we read a file, we don't need section type and flags unless
2428 it is a linker created section. They will be overridden in
2429 _bfd_elf_make_section_from_shdr anyway. */
2430 if (abfd->direction != read_direction
2431 || (sec->flags & SEC_LINKER_CREATED) != 0)
2433 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2436 elf_section_type (sec) = ssect->type;
2437 elf_section_flags (sec) = ssect->attr;
2444 /* Create a new bfd section from an ELF program header.
2446 Since program segments have no names, we generate a synthetic name
2447 of the form segment<NUM>, where NUM is generally the index in the
2448 program header table. For segments that are split (see below) we
2449 generate the names segment<NUM>a and segment<NUM>b.
2451 Note that some program segments may have a file size that is different than
2452 (less than) the memory size. All this means is that at execution the
2453 system must allocate the amount of memory specified by the memory size,
2454 but only initialize it with the first "file size" bytes read from the
2455 file. This would occur for example, with program segments consisting
2456 of combined data+bss.
2458 To handle the above situation, this routine generates TWO bfd sections
2459 for the single program segment. The first has the length specified by
2460 the file size of the segment, and the second has the length specified
2461 by the difference between the two sizes. In effect, the segment is split
2462 into it's initialized and uninitialized parts.
2467 _bfd_elf_make_section_from_phdr (bfd *abfd,
2468 Elf_Internal_Phdr *hdr,
2470 const char *typename)
2478 split = ((hdr->p_memsz > 0)
2479 && (hdr->p_filesz > 0)
2480 && (hdr->p_memsz > hdr->p_filesz));
2481 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2482 len = strlen (namebuf) + 1;
2483 name = bfd_alloc (abfd, len);
2486 memcpy (name, namebuf, len);
2487 newsect = bfd_make_section (abfd, name);
2488 if (newsect == NULL)
2490 newsect->vma = hdr->p_vaddr;
2491 newsect->lma = hdr->p_paddr;
2492 newsect->size = hdr->p_filesz;
2493 newsect->filepos = hdr->p_offset;
2494 newsect->flags |= SEC_HAS_CONTENTS;
2495 newsect->alignment_power = bfd_log2 (hdr->p_align);
2496 if (hdr->p_type == PT_LOAD)
2498 newsect->flags |= SEC_ALLOC;
2499 newsect->flags |= SEC_LOAD;
2500 if (hdr->p_flags & PF_X)
2502 /* FIXME: all we known is that it has execute PERMISSION,
2504 newsect->flags |= SEC_CODE;
2507 if (!(hdr->p_flags & PF_W))
2509 newsect->flags |= SEC_READONLY;
2514 sprintf (namebuf, "%s%db", typename, index);
2515 len = strlen (namebuf) + 1;
2516 name = bfd_alloc (abfd, len);
2519 memcpy (name, namebuf, len);
2520 newsect = bfd_make_section (abfd, name);
2521 if (newsect == NULL)
2523 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2524 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2525 newsect->size = hdr->p_memsz - hdr->p_filesz;
2526 if (hdr->p_type == PT_LOAD)
2528 newsect->flags |= SEC_ALLOC;
2529 if (hdr->p_flags & PF_X)
2530 newsect->flags |= SEC_CODE;
2532 if (!(hdr->p_flags & PF_W))
2533 newsect->flags |= SEC_READONLY;
2540 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2542 const struct elf_backend_data *bed;
2544 switch (hdr->p_type)
2547 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2550 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2553 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2556 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2559 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2561 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2566 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2569 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2571 case PT_GNU_EH_FRAME:
2572 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2576 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2579 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2582 /* Check for any processor-specific program segment types. */
2583 bed = get_elf_backend_data (abfd);
2584 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2588 /* Initialize REL_HDR, the section-header for new section, containing
2589 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2590 relocations; otherwise, we use REL relocations. */
2593 _bfd_elf_init_reloc_shdr (bfd *abfd,
2594 Elf_Internal_Shdr *rel_hdr,
2596 bfd_boolean use_rela_p)
2599 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2600 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2602 name = bfd_alloc (abfd, amt);
2605 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2607 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2609 if (rel_hdr->sh_name == (unsigned int) -1)
2611 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2612 rel_hdr->sh_entsize = (use_rela_p
2613 ? bed->s->sizeof_rela
2614 : bed->s->sizeof_rel);
2615 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2616 rel_hdr->sh_flags = 0;
2617 rel_hdr->sh_addr = 0;
2618 rel_hdr->sh_size = 0;
2619 rel_hdr->sh_offset = 0;
2624 /* Set up an ELF internal section header for a section. */
2627 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2629 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2630 bfd_boolean *failedptr = failedptrarg;
2631 Elf_Internal_Shdr *this_hdr;
2635 /* We already failed; just get out of the bfd_map_over_sections
2640 this_hdr = &elf_section_data (asect)->this_hdr;
2642 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2643 asect->name, FALSE);
2644 if (this_hdr->sh_name == (unsigned int) -1)
2650 /* Don't clear sh_flags. Assembler may set additional bits. */
2652 if ((asect->flags & SEC_ALLOC) != 0
2653 || asect->user_set_vma)
2654 this_hdr->sh_addr = asect->vma;
2656 this_hdr->sh_addr = 0;
2658 this_hdr->sh_offset = 0;
2659 this_hdr->sh_size = asect->size;
2660 this_hdr->sh_link = 0;
2661 this_hdr->sh_addralign = 1 << asect->alignment_power;
2662 /* The sh_entsize and sh_info fields may have been set already by
2663 copy_private_section_data. */
2665 this_hdr->bfd_section = asect;
2666 this_hdr->contents = NULL;
2668 /* If the section type is unspecified, we set it based on
2670 if (this_hdr->sh_type == SHT_NULL)
2672 if ((asect->flags & SEC_GROUP) != 0)
2673 this_hdr->sh_type = SHT_GROUP;
2674 else if ((asect->flags & SEC_ALLOC) != 0
2675 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2676 || (asect->flags & SEC_NEVER_LOAD) != 0))
2677 this_hdr->sh_type = SHT_NOBITS;
2679 this_hdr->sh_type = SHT_PROGBITS;
2682 switch (this_hdr->sh_type)
2688 case SHT_INIT_ARRAY:
2689 case SHT_FINI_ARRAY:
2690 case SHT_PREINIT_ARRAY:
2697 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2701 this_hdr->sh_entsize = bed->s->sizeof_sym;
2705 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2709 if (get_elf_backend_data (abfd)->may_use_rela_p)
2710 this_hdr->sh_entsize = bed->s->sizeof_rela;
2714 if (get_elf_backend_data (abfd)->may_use_rel_p)
2715 this_hdr->sh_entsize = bed->s->sizeof_rel;
2718 case SHT_GNU_versym:
2719 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2722 case SHT_GNU_verdef:
2723 this_hdr->sh_entsize = 0;
2724 /* objcopy or strip will copy over sh_info, but may not set
2725 cverdefs. The linker will set cverdefs, but sh_info will be
2727 if (this_hdr->sh_info == 0)
2728 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2730 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2731 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2734 case SHT_GNU_verneed:
2735 this_hdr->sh_entsize = 0;
2736 /* objcopy or strip will copy over sh_info, but may not set
2737 cverrefs. The linker will set cverrefs, but sh_info will be
2739 if (this_hdr->sh_info == 0)
2740 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2742 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2743 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2747 this_hdr->sh_entsize = 4;
2751 if ((asect->flags & SEC_ALLOC) != 0)
2752 this_hdr->sh_flags |= SHF_ALLOC;
2753 if ((asect->flags & SEC_READONLY) == 0)
2754 this_hdr->sh_flags |= SHF_WRITE;
2755 if ((asect->flags & SEC_CODE) != 0)
2756 this_hdr->sh_flags |= SHF_EXECINSTR;
2757 if ((asect->flags & SEC_MERGE) != 0)
2759 this_hdr->sh_flags |= SHF_MERGE;
2760 this_hdr->sh_entsize = asect->entsize;
2761 if ((asect->flags & SEC_STRINGS) != 0)
2762 this_hdr->sh_flags |= SHF_STRINGS;
2764 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2765 this_hdr->sh_flags |= SHF_GROUP;
2766 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2768 this_hdr->sh_flags |= SHF_TLS;
2769 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2771 struct bfd_link_order *o;
2773 this_hdr->sh_size = 0;
2774 for (o = asect->map_head.link_order; o != NULL; o = o->next)
2775 if (this_hdr->sh_size < o->offset + o->size)
2776 this_hdr->sh_size = o->offset + o->size;
2777 if (this_hdr->sh_size)
2778 this_hdr->sh_type = SHT_NOBITS;
2782 /* Check for processor-specific section types. */
2783 if (bed->elf_backend_fake_sections
2784 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2787 /* If the section has relocs, set up a section header for the
2788 SHT_REL[A] section. If two relocation sections are required for
2789 this section, it is up to the processor-specific back-end to
2790 create the other. */
2791 if ((asect->flags & SEC_RELOC) != 0
2792 && !_bfd_elf_init_reloc_shdr (abfd,
2793 &elf_section_data (asect)->rel_hdr,
2799 /* Fill in the contents of a SHT_GROUP section. */
2802 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2804 bfd_boolean *failedptr = failedptrarg;
2805 unsigned long symindx;
2806 asection *elt, *first;
2810 /* Ignore linker created group section. See elfNN_ia64_object_p in
2812 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2817 if (elf_group_id (sec) != NULL)
2818 symindx = elf_group_id (sec)->udata.i;
2822 /* If called from the assembler, swap_out_syms will have set up
2823 elf_section_syms; If called for "ld -r", use target_index. */
2824 if (elf_section_syms (abfd) != NULL)
2825 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2827 symindx = sec->target_index;
2829 elf_section_data (sec)->this_hdr.sh_info = symindx;
2831 /* The contents won't be allocated for "ld -r" or objcopy. */
2833 if (sec->contents == NULL)
2836 sec->contents = bfd_alloc (abfd, sec->size);
2838 /* Arrange for the section to be written out. */
2839 elf_section_data (sec)->this_hdr.contents = sec->contents;
2840 if (sec->contents == NULL)
2847 loc = sec->contents + sec->size;
2849 /* Get the pointer to the first section in the group that gas
2850 squirreled away here. objcopy arranges for this to be set to the
2851 start of the input section group. */
2852 first = elt = elf_next_in_group (sec);
2854 /* First element is a flag word. Rest of section is elf section
2855 indices for all the sections of the group. Write them backwards
2856 just to keep the group in the same order as given in .section
2857 directives, not that it matters. */
2866 s = s->output_section;
2869 idx = elf_section_data (s)->this_idx;
2870 H_PUT_32 (abfd, idx, loc);
2871 elt = elf_next_in_group (elt);
2876 if ((loc -= 4) != sec->contents)
2879 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2882 /* Assign all ELF section numbers. The dummy first section is handled here
2883 too. The link/info pointers for the standard section types are filled
2884 in here too, while we're at it. */
2887 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2889 struct elf_obj_tdata *t = elf_tdata (abfd);
2891 unsigned int section_number, secn;
2892 Elf_Internal_Shdr **i_shdrp;
2893 struct bfd_elf_section_data *d;
2897 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2899 /* SHT_GROUP sections are in relocatable files only. */
2900 if (link_info == NULL || link_info->relocatable)
2902 /* Put SHT_GROUP sections first. */
2903 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2905 d = elf_section_data (sec);
2907 if (d->this_hdr.sh_type == SHT_GROUP)
2909 if (sec->flags & SEC_LINKER_CREATED)
2911 /* Remove the linker created SHT_GROUP sections. */
2912 bfd_section_list_remove (abfd, sec);
2913 abfd->section_count--;
2917 if (section_number == SHN_LORESERVE)
2918 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2919 d->this_idx = section_number++;
2925 for (sec = abfd->sections; sec; sec = sec->next)
2927 d = elf_section_data (sec);
2929 if (d->this_hdr.sh_type != SHT_GROUP)
2931 if (section_number == SHN_LORESERVE)
2932 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2933 d->this_idx = section_number++;
2935 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2936 if ((sec->flags & SEC_RELOC) == 0)
2940 if (section_number == SHN_LORESERVE)
2941 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2942 d->rel_idx = section_number++;
2943 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2948 if (section_number == SHN_LORESERVE)
2949 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2950 d->rel_idx2 = section_number++;
2951 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2957 if (section_number == SHN_LORESERVE)
2958 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2959 t->shstrtab_section = section_number++;
2960 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2961 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2963 if (bfd_get_symcount (abfd) > 0)
2965 if (section_number == SHN_LORESERVE)
2966 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2967 t->symtab_section = section_number++;
2968 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2969 if (section_number > SHN_LORESERVE - 2)
2971 if (section_number == SHN_LORESERVE)
2972 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2973 t->symtab_shndx_section = section_number++;
2974 t->symtab_shndx_hdr.sh_name
2975 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2976 ".symtab_shndx", FALSE);
2977 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2980 if (section_number == SHN_LORESERVE)
2981 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2982 t->strtab_section = section_number++;
2983 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2986 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2987 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2989 elf_numsections (abfd) = section_number;
2990 elf_elfheader (abfd)->e_shnum = section_number;
2991 if (section_number > SHN_LORESERVE)
2992 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2994 /* Set up the list of section header pointers, in agreement with the
2996 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2997 if (i_shdrp == NULL)
3000 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3001 if (i_shdrp[0] == NULL)
3003 bfd_release (abfd, i_shdrp);
3007 elf_elfsections (abfd) = i_shdrp;
3009 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3010 if (bfd_get_symcount (abfd) > 0)
3012 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3013 if (elf_numsections (abfd) > SHN_LORESERVE)
3015 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3016 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3018 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3019 t->symtab_hdr.sh_link = t->strtab_section;
3022 for (sec = abfd->sections; sec; sec = sec->next)
3024 struct bfd_elf_section_data *d = elf_section_data (sec);
3028 i_shdrp[d->this_idx] = &d->this_hdr;
3029 if (d->rel_idx != 0)
3030 i_shdrp[d->rel_idx] = &d->rel_hdr;
3031 if (d->rel_idx2 != 0)
3032 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3034 /* Fill in the sh_link and sh_info fields while we're at it. */
3036 /* sh_link of a reloc section is the section index of the symbol
3037 table. sh_info is the section index of the section to which
3038 the relocation entries apply. */
3039 if (d->rel_idx != 0)
3041 d->rel_hdr.sh_link = t->symtab_section;
3042 d->rel_hdr.sh_info = d->this_idx;
3044 if (d->rel_idx2 != 0)
3046 d->rel_hdr2->sh_link = t->symtab_section;
3047 d->rel_hdr2->sh_info = d->this_idx;
3050 /* We need to set up sh_link for SHF_LINK_ORDER. */
3051 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3053 s = elf_linked_to_section (sec);
3056 if (link_info != NULL)
3058 /* For linker, elf_linked_to_section points to the
3060 if (elf_discarded_section (s))
3063 (*_bfd_error_handler)
3064 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3065 abfd, d->this_hdr.bfd_section,
3067 /* Point to the kept section if it has the same
3068 size as the discarded one. */
3069 kept = _bfd_elf_check_kept_section (s);
3072 bfd_set_error (bfd_error_bad_value);
3077 s = s->output_section;
3078 BFD_ASSERT (s != NULL);
3080 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3085 The Intel C compiler generates SHT_IA_64_UNWIND with
3086 SHF_LINK_ORDER. But it doesn't set the sh_link or
3087 sh_info fields. Hence we could get the situation
3089 const struct elf_backend_data *bed
3090 = get_elf_backend_data (abfd);
3091 if (bed->link_order_error_handler)
3092 bed->link_order_error_handler
3093 (_("%B: warning: sh_link not set for section `%A'"),
3098 switch (d->this_hdr.sh_type)
3102 /* A reloc section which we are treating as a normal BFD
3103 section. sh_link is the section index of the symbol
3104 table. sh_info is the section index of the section to
3105 which the relocation entries apply. We assume that an
3106 allocated reloc section uses the dynamic symbol table.
3107 FIXME: How can we be sure? */
3108 s = bfd_get_section_by_name (abfd, ".dynsym");
3110 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3112 /* We look up the section the relocs apply to by name. */
3114 if (d->this_hdr.sh_type == SHT_REL)
3118 s = bfd_get_section_by_name (abfd, name);
3120 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3124 /* We assume that a section named .stab*str is a stabs
3125 string section. We look for a section with the same name
3126 but without the trailing ``str'', and set its sh_link
3127 field to point to this section. */
3128 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3129 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3134 len = strlen (sec->name);
3135 alc = bfd_malloc (len - 2);
3138 memcpy (alc, sec->name, len - 3);
3139 alc[len - 3] = '\0';
3140 s = bfd_get_section_by_name (abfd, alc);
3144 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3146 /* This is a .stab section. */
3147 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3148 elf_section_data (s)->this_hdr.sh_entsize
3149 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3156 case SHT_GNU_verneed:
3157 case SHT_GNU_verdef:
3158 /* sh_link is the section header index of the string table
3159 used for the dynamic entries, or the symbol table, or the
3161 s = bfd_get_section_by_name (abfd, ".dynstr");
3163 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3166 case SHT_GNU_LIBLIST:
3167 /* sh_link is the section header index of the prelink library
3169 used for the dynamic entries, or the symbol table, or the
3171 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3172 ? ".dynstr" : ".gnu.libstr");
3174 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3178 case SHT_GNU_versym:
3179 /* sh_link is the section header index of the symbol table
3180 this hash table or version table is for. */
3181 s = bfd_get_section_by_name (abfd, ".dynsym");
3183 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3187 d->this_hdr.sh_link = t->symtab_section;
3191 for (secn = 1; secn < section_number; ++secn)
3192 if (i_shdrp[secn] == NULL)
3193 i_shdrp[secn] = i_shdrp[0];
3195 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3196 i_shdrp[secn]->sh_name);
3200 /* Map symbol from it's internal number to the external number, moving
3201 all local symbols to be at the head of the list. */
3204 sym_is_global (bfd *abfd, asymbol *sym)
3206 /* If the backend has a special mapping, use it. */
3207 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3208 if (bed->elf_backend_sym_is_global)
3209 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3211 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3212 || bfd_is_und_section (bfd_get_section (sym))
3213 || bfd_is_com_section (bfd_get_section (sym)));
3217 elf_map_symbols (bfd *abfd)
3219 unsigned int symcount = bfd_get_symcount (abfd);
3220 asymbol **syms = bfd_get_outsymbols (abfd);
3221 asymbol **sect_syms;
3222 unsigned int num_locals = 0;
3223 unsigned int num_globals = 0;
3224 unsigned int num_locals2 = 0;
3225 unsigned int num_globals2 = 0;
3232 fprintf (stderr, "elf_map_symbols\n");
3236 for (asect = abfd->sections; asect; asect = asect->next)
3238 if (max_index < asect->index)
3239 max_index = asect->index;
3243 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3244 if (sect_syms == NULL)
3246 elf_section_syms (abfd) = sect_syms;
3247 elf_num_section_syms (abfd) = max_index;
3249 /* Init sect_syms entries for any section symbols we have already
3250 decided to output. */
3251 for (idx = 0; idx < symcount; idx++)
3253 asymbol *sym = syms[idx];
3255 if ((sym->flags & BSF_SECTION_SYM) != 0
3262 if (sec->owner != NULL)
3264 if (sec->owner != abfd)
3266 if (sec->output_offset != 0)
3269 sec = sec->output_section;
3271 /* Empty sections in the input files may have had a
3272 section symbol created for them. (See the comment
3273 near the end of _bfd_generic_link_output_symbols in
3274 linker.c). If the linker script discards such
3275 sections then we will reach this point. Since we know
3276 that we cannot avoid this case, we detect it and skip
3277 the abort and the assignment to the sect_syms array.
3278 To reproduce this particular case try running the
3279 linker testsuite test ld-scripts/weak.exp for an ELF
3280 port that uses the generic linker. */
3281 if (sec->owner == NULL)
3284 BFD_ASSERT (sec->owner == abfd);
3286 sect_syms[sec->index] = syms[idx];
3291 /* Classify all of the symbols. */
3292 for (idx = 0; idx < symcount; idx++)
3294 if (!sym_is_global (abfd, syms[idx]))
3300 /* We will be adding a section symbol for each BFD section. Most normal
3301 sections will already have a section symbol in outsymbols, but
3302 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3303 at least in that case. */
3304 for (asect = abfd->sections; asect; asect = asect->next)
3306 if (sect_syms[asect->index] == NULL)
3308 if (!sym_is_global (abfd, asect->symbol))
3315 /* Now sort the symbols so the local symbols are first. */
3316 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3318 if (new_syms == NULL)
3321 for (idx = 0; idx < symcount; idx++)
3323 asymbol *sym = syms[idx];
3326 if (!sym_is_global (abfd, sym))
3329 i = num_locals + num_globals2++;
3331 sym->udata.i = i + 1;
3333 for (asect = abfd->sections; asect; asect = asect->next)
3335 if (sect_syms[asect->index] == NULL)
3337 asymbol *sym = asect->symbol;
3340 sect_syms[asect->index] = sym;
3341 if (!sym_is_global (abfd, sym))
3344 i = num_locals + num_globals2++;
3346 sym->udata.i = i + 1;
3350 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3352 elf_num_locals (abfd) = num_locals;
3353 elf_num_globals (abfd) = num_globals;
3357 /* Align to the maximum file alignment that could be required for any
3358 ELF data structure. */
3360 static inline file_ptr
3361 align_file_position (file_ptr off, int align)
3363 return (off + align - 1) & ~(align - 1);
3366 /* Assign a file position to a section, optionally aligning to the
3367 required section alignment. */
3370 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3378 al = i_shdrp->sh_addralign;
3380 offset = BFD_ALIGN (offset, al);
3382 i_shdrp->sh_offset = offset;
3383 if (i_shdrp->bfd_section != NULL)
3384 i_shdrp->bfd_section->filepos = offset;
3385 if (i_shdrp->sh_type != SHT_NOBITS)
3386 offset += i_shdrp->sh_size;
3390 /* Compute the file positions we are going to put the sections at, and
3391 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3392 is not NULL, this is being called by the ELF backend linker. */
3395 _bfd_elf_compute_section_file_positions (bfd *abfd,
3396 struct bfd_link_info *link_info)
3398 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3400 struct bfd_strtab_hash *strtab = NULL;
3401 Elf_Internal_Shdr *shstrtab_hdr;
3403 if (abfd->output_has_begun)
3406 /* Do any elf backend specific processing first. */
3407 if (bed->elf_backend_begin_write_processing)
3408 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3410 if (! prep_headers (abfd))
3413 /* Post process the headers if necessary. */
3414 if (bed->elf_backend_post_process_headers)
3415 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3418 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3422 if (!assign_section_numbers (abfd, link_info))
3425 /* The backend linker builds symbol table information itself. */
3426 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3428 /* Non-zero if doing a relocatable link. */
3429 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3431 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3435 if (link_info == NULL)
3437 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3442 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3443 /* sh_name was set in prep_headers. */
3444 shstrtab_hdr->sh_type = SHT_STRTAB;
3445 shstrtab_hdr->sh_flags = 0;
3446 shstrtab_hdr->sh_addr = 0;
3447 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3448 shstrtab_hdr->sh_entsize = 0;
3449 shstrtab_hdr->sh_link = 0;
3450 shstrtab_hdr->sh_info = 0;
3451 /* sh_offset is set in assign_file_positions_except_relocs. */
3452 shstrtab_hdr->sh_addralign = 1;
3454 if (!assign_file_positions_except_relocs (abfd, link_info))
3457 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3460 Elf_Internal_Shdr *hdr;
3462 off = elf_tdata (abfd)->next_file_pos;
3464 hdr = &elf_tdata (abfd)->symtab_hdr;
3465 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3467 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3468 if (hdr->sh_size != 0)
3469 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3471 hdr = &elf_tdata (abfd)->strtab_hdr;
3472 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3474 elf_tdata (abfd)->next_file_pos = off;
3476 /* Now that we know where the .strtab section goes, write it
3478 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3479 || ! _bfd_stringtab_emit (abfd, strtab))
3481 _bfd_stringtab_free (strtab);
3484 abfd->output_has_begun = TRUE;
3489 /* Create a mapping from a set of sections to a program segment. */
3491 static struct elf_segment_map *
3492 make_mapping (bfd *abfd,
3493 asection **sections,
3498 struct elf_segment_map *m;
3503 amt = sizeof (struct elf_segment_map);
3504 amt += (to - from - 1) * sizeof (asection *);
3505 m = bfd_zalloc (abfd, amt);
3509 m->p_type = PT_LOAD;
3510 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3511 m->sections[i - from] = *hdrpp;
3512 m->count = to - from;
3514 if (from == 0 && phdr)
3516 /* Include the headers in the first PT_LOAD segment. */
3517 m->includes_filehdr = 1;
3518 m->includes_phdrs = 1;
3524 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3527 struct elf_segment_map *
3528 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3530 struct elf_segment_map *m;
3532 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3536 m->p_type = PT_DYNAMIC;
3538 m->sections[0] = dynsec;
3543 /* Set up a mapping from BFD sections to program segments. */
3546 map_sections_to_segments (bfd *abfd)
3548 asection **sections = NULL;
3552 struct elf_segment_map *mfirst;
3553 struct elf_segment_map **pm;
3554 struct elf_segment_map *m;
3557 unsigned int phdr_index;
3558 bfd_vma maxpagesize;
3560 bfd_boolean phdr_in_segment = TRUE;
3561 bfd_boolean writable;
3563 asection *first_tls = NULL;
3564 asection *dynsec, *eh_frame_hdr;
3567 if (elf_tdata (abfd)->segment_map != NULL)
3570 if (bfd_count_sections (abfd) == 0)
3573 /* Select the allocated sections, and sort them. */
3575 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3576 if (sections == NULL)
3580 for (s = abfd->sections; s != NULL; s = s->next)
3582 if ((s->flags & SEC_ALLOC) != 0)
3588 BFD_ASSERT (i <= bfd_count_sections (abfd));
3591 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3593 /* Build the mapping. */
3598 /* If we have a .interp section, then create a PT_PHDR segment for
3599 the program headers and a PT_INTERP segment for the .interp
3601 s = bfd_get_section_by_name (abfd, ".interp");
3602 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3604 amt = sizeof (struct elf_segment_map);
3605 m = bfd_zalloc (abfd, amt);
3609 m->p_type = PT_PHDR;
3610 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3611 m->p_flags = PF_R | PF_X;
3612 m->p_flags_valid = 1;
3613 m->includes_phdrs = 1;
3618 amt = sizeof (struct elf_segment_map);
3619 m = bfd_zalloc (abfd, amt);
3623 m->p_type = PT_INTERP;
3631 /* Look through the sections. We put sections in the same program
3632 segment when the start of the second section can be placed within
3633 a few bytes of the end of the first section. */
3637 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3639 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3641 && (dynsec->flags & SEC_LOAD) == 0)
3644 /* Deal with -Ttext or something similar such that the first section
3645 is not adjacent to the program headers. This is an
3646 approximation, since at this point we don't know exactly how many
3647 program headers we will need. */
3650 bfd_size_type phdr_size;
3652 phdr_size = elf_tdata (abfd)->program_header_size;
3654 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3655 if ((abfd->flags & D_PAGED) == 0
3656 || sections[0]->lma < phdr_size
3657 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3658 phdr_in_segment = FALSE;
3661 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3664 bfd_boolean new_segment;
3668 /* See if this section and the last one will fit in the same
3671 if (last_hdr == NULL)
3673 /* If we don't have a segment yet, then we don't need a new
3674 one (we build the last one after this loop). */
3675 new_segment = FALSE;
3677 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3679 /* If this section has a different relation between the
3680 virtual address and the load address, then we need a new
3684 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3685 < BFD_ALIGN (hdr->lma, maxpagesize))
3687 /* If putting this section in this segment would force us to
3688 skip a page in the segment, then we need a new segment. */
3691 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3692 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3694 /* We don't want to put a loadable section after a
3695 nonloadable section in the same segment.
3696 Consider .tbss sections as loadable for this purpose. */
3699 else if ((abfd->flags & D_PAGED) == 0)
3701 /* If the file is not demand paged, which means that we
3702 don't require the sections to be correctly aligned in the
3703 file, then there is no other reason for a new segment. */
3704 new_segment = FALSE;
3707 && (hdr->flags & SEC_READONLY) == 0
3708 && (((last_hdr->lma + last_size - 1)
3709 & ~(maxpagesize - 1))
3710 != (hdr->lma & ~(maxpagesize - 1))))
3712 /* We don't want to put a writable section in a read only
3713 segment, unless they are on the same page in memory
3714 anyhow. We already know that the last section does not
3715 bring us past the current section on the page, so the
3716 only case in which the new section is not on the same
3717 page as the previous section is when the previous section
3718 ends precisely on a page boundary. */
3723 /* Otherwise, we can use the same segment. */
3724 new_segment = FALSE;
3729 if ((hdr->flags & SEC_READONLY) == 0)
3732 /* .tbss sections effectively have zero size. */
3733 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3734 last_size = hdr->size;
3740 /* We need a new program segment. We must create a new program
3741 header holding all the sections from phdr_index until hdr. */
3743 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3750 if ((hdr->flags & SEC_READONLY) == 0)
3756 /* .tbss sections effectively have zero size. */
3757 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3758 last_size = hdr->size;
3762 phdr_in_segment = FALSE;
3765 /* Create a final PT_LOAD program segment. */
3766 if (last_hdr != NULL)
3768 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3776 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3779 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3786 /* For each loadable .note section, add a PT_NOTE segment. We don't
3787 use bfd_get_section_by_name, because if we link together
3788 nonloadable .note sections and loadable .note sections, we will
3789 generate two .note sections in the output file. FIXME: Using
3790 names for section types is bogus anyhow. */
3791 for (s = abfd->sections; s != NULL; s = s->next)
3793 if ((s->flags & SEC_LOAD) != 0
3794 && strncmp (s->name, ".note", 5) == 0)
3796 amt = sizeof (struct elf_segment_map);
3797 m = bfd_zalloc (abfd, amt);
3801 m->p_type = PT_NOTE;
3808 if (s->flags & SEC_THREAD_LOCAL)
3816 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3821 amt = sizeof (struct elf_segment_map);
3822 amt += (tls_count - 1) * sizeof (asection *);
3823 m = bfd_zalloc (abfd, amt);
3828 m->count = tls_count;
3829 /* Mandated PF_R. */
3831 m->p_flags_valid = 1;
3832 for (i = 0; i < tls_count; ++i)
3834 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3835 m->sections[i] = first_tls;
3836 first_tls = first_tls->next;
3843 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3845 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3846 if (eh_frame_hdr != NULL
3847 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3849 amt = sizeof (struct elf_segment_map);
3850 m = bfd_zalloc (abfd, amt);
3854 m->p_type = PT_GNU_EH_FRAME;
3856 m->sections[0] = eh_frame_hdr->output_section;
3862 if (elf_tdata (abfd)->stack_flags)
3864 amt = sizeof (struct elf_segment_map);
3865 m = bfd_zalloc (abfd, amt);
3869 m->p_type = PT_GNU_STACK;
3870 m->p_flags = elf_tdata (abfd)->stack_flags;
3871 m->p_flags_valid = 1;
3877 if (elf_tdata (abfd)->relro)
3879 amt = sizeof (struct elf_segment_map);
3880 m = bfd_zalloc (abfd, amt);
3884 m->p_type = PT_GNU_RELRO;
3886 m->p_flags_valid = 1;
3895 elf_tdata (abfd)->segment_map = mfirst;
3899 if (sections != NULL)
3904 /* Sort sections by address. */
3907 elf_sort_sections (const void *arg1, const void *arg2)
3909 const asection *sec1 = *(const asection **) arg1;
3910 const asection *sec2 = *(const asection **) arg2;
3911 bfd_size_type size1, size2;
3913 /* Sort by LMA first, since this is the address used to
3914 place the section into a segment. */
3915 if (sec1->lma < sec2->lma)
3917 else if (sec1->lma > sec2->lma)
3920 /* Then sort by VMA. Normally the LMA and the VMA will be
3921 the same, and this will do nothing. */
3922 if (sec1->vma < sec2->vma)
3924 else if (sec1->vma > sec2->vma)
3927 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3929 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3935 /* If the indicies are the same, do not return 0
3936 here, but continue to try the next comparison. */
3937 if (sec1->target_index - sec2->target_index != 0)
3938 return sec1->target_index - sec2->target_index;
3943 else if (TOEND (sec2))
3948 /* Sort by size, to put zero sized sections
3949 before others at the same address. */
3951 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3952 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3959 return sec1->target_index - sec2->target_index;
3962 /* Ian Lance Taylor writes:
3964 We shouldn't be using % with a negative signed number. That's just
3965 not good. We have to make sure either that the number is not
3966 negative, or that the number has an unsigned type. When the types
3967 are all the same size they wind up as unsigned. When file_ptr is a
3968 larger signed type, the arithmetic winds up as signed long long,
3971 What we're trying to say here is something like ``increase OFF by
3972 the least amount that will cause it to be equal to the VMA modulo
3974 /* In other words, something like:
3976 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3977 off_offset = off % bed->maxpagesize;
3978 if (vma_offset < off_offset)
3979 adjustment = vma_offset + bed->maxpagesize - off_offset;
3981 adjustment = vma_offset - off_offset;
3983 which can can be collapsed into the expression below. */
3986 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3988 return ((vma - off) % maxpagesize);
3991 /* Assign file positions to the sections based on the mapping from
3992 sections to segments. This function also sets up some fields in
3993 the file header, and writes out the program headers. */
3996 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3998 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4000 struct elf_segment_map *m;
4002 Elf_Internal_Phdr *phdrs;
4004 bfd_vma filehdr_vaddr, filehdr_paddr;
4005 bfd_vma phdrs_vaddr, phdrs_paddr;
4006 Elf_Internal_Phdr *p;
4008 if (elf_tdata (abfd)->segment_map == NULL)
4010 if (! map_sections_to_segments (abfd))
4015 /* The placement algorithm assumes that non allocated sections are
4016 not in PT_LOAD segments. We ensure this here by removing such
4017 sections from the segment map. We also remove excluded
4019 for (m = elf_tdata (abfd)->segment_map;
4023 unsigned int new_count;
4027 for (i = 0; i < m->count; i ++)
4029 if ((m->sections[i]->flags & SEC_EXCLUDE) == 0
4030 && ((m->sections[i]->flags & SEC_ALLOC) != 0
4031 || m->p_type != PT_LOAD))
4034 m->sections[new_count] = m->sections[i];
4040 if (new_count != m->count)
4041 m->count = new_count;
4045 if (bed->elf_backend_modify_segment_map)
4047 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4052 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4055 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4056 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4057 elf_elfheader (abfd)->e_phnum = count;
4061 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4065 /* If we already counted the number of program segments, make sure
4066 that we allocated enough space. This happens when SIZEOF_HEADERS
4067 is used in a linker script. */
4068 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4069 if (alloc != 0 && count > alloc)
4071 ((*_bfd_error_handler)
4072 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4073 abfd, alloc, count));
4074 bfd_set_error (bfd_error_bad_value);
4081 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4085 off = bed->s->sizeof_ehdr;
4086 off += alloc * bed->s->sizeof_phdr;
4093 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4100 /* If elf_segment_map is not from map_sections_to_segments, the
4101 sections may not be correctly ordered. NOTE: sorting should
4102 not be done to the PT_NOTE section of a corefile, which may
4103 contain several pseudo-sections artificially created by bfd.
4104 Sorting these pseudo-sections breaks things badly. */
4106 && !(elf_elfheader (abfd)->e_type == ET_CORE
4107 && m->p_type == PT_NOTE))
4108 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4111 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4112 number of sections with contents contributing to both p_filesz
4113 and p_memsz, followed by a number of sections with no contents
4114 that just contribute to p_memsz. In this loop, OFF tracks next
4115 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4116 an adjustment we use for segments that have no file contents
4117 but need zero filled memory allocation. */
4119 p->p_type = m->p_type;
4120 p->p_flags = m->p_flags;
4122 if (p->p_type == PT_LOAD
4125 bfd_size_type align;
4127 unsigned int align_power = 0;
4129 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4131 unsigned int secalign;
4133 secalign = bfd_get_section_alignment (abfd, *secpp);
4134 if (secalign > align_power)
4135 align_power = secalign;
4137 align = (bfd_size_type) 1 << align_power;
4139 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > align)
4140 align = bed->maxpagesize;
4142 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4145 && !m->includes_filehdr
4146 && !m->includes_phdrs
4147 && (ufile_ptr) off >= align)
4149 /* If the first section isn't loadable, the same holds for
4150 any other sections. Since the segment won't need file
4151 space, we can make p_offset overlap some prior segment.
4152 However, .tbss is special. If a segment starts with
4153 .tbss, we need to look at the next section to decide
4154 whether the segment has any loadable sections. */
4156 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4158 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4162 voff = adjust - align;
4168 /* Make sure the .dynamic section is the first section in the
4169 PT_DYNAMIC segment. */
4170 else if (p->p_type == PT_DYNAMIC
4172 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4175 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4177 bfd_set_error (bfd_error_bad_value);
4184 p->p_vaddr = m->sections[0]->vma;
4186 if (m->p_paddr_valid)
4187 p->p_paddr = m->p_paddr;
4188 else if (m->count == 0)
4191 p->p_paddr = m->sections[0]->lma;
4193 if (p->p_type == PT_LOAD
4194 && (abfd->flags & D_PAGED) != 0)
4195 p->p_align = bed->maxpagesize;
4196 else if (m->count == 0)
4197 p->p_align = 1 << bed->s->log_file_align;
4205 if (m->includes_filehdr)
4207 if (! m->p_flags_valid)
4210 p->p_filesz = bed->s->sizeof_ehdr;
4211 p->p_memsz = bed->s->sizeof_ehdr;
4214 BFD_ASSERT (p->p_type == PT_LOAD);
4216 if (p->p_vaddr < (bfd_vma) off)
4218 (*_bfd_error_handler)
4219 (_("%B: Not enough room for program headers, try linking with -N"),
4221 bfd_set_error (bfd_error_bad_value);
4226 if (! m->p_paddr_valid)
4229 if (p->p_type == PT_LOAD)
4231 filehdr_vaddr = p->p_vaddr;
4232 filehdr_paddr = p->p_paddr;
4236 if (m->includes_phdrs)
4238 if (! m->p_flags_valid)
4241 if (m->includes_filehdr)
4243 if (p->p_type == PT_LOAD)
4245 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4246 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4251 p->p_offset = bed->s->sizeof_ehdr;
4255 BFD_ASSERT (p->p_type == PT_LOAD);
4256 p->p_vaddr -= off - p->p_offset;
4257 if (! m->p_paddr_valid)
4258 p->p_paddr -= off - p->p_offset;
4261 if (p->p_type == PT_LOAD)
4263 phdrs_vaddr = p->p_vaddr;
4264 phdrs_paddr = p->p_paddr;
4267 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4270 p->p_filesz += alloc * bed->s->sizeof_phdr;
4271 p->p_memsz += alloc * bed->s->sizeof_phdr;
4274 if (p->p_type == PT_LOAD
4275 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4277 if (! m->includes_filehdr && ! m->includes_phdrs)
4278 p->p_offset = off + voff;
4283 adjust = off - (p->p_offset + p->p_filesz);
4284 p->p_filesz += adjust;
4285 p->p_memsz += adjust;
4289 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4293 bfd_size_type align;
4297 align = 1 << bfd_get_section_alignment (abfd, sec);
4299 if (p->p_type == PT_LOAD
4300 || p->p_type == PT_TLS)
4302 bfd_signed_vma adjust;
4304 if ((flags & SEC_LOAD) != 0)
4306 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4309 (*_bfd_error_handler)
4310 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4311 abfd, sec, (unsigned long) sec->lma);
4315 p->p_filesz += adjust;
4316 p->p_memsz += adjust;
4318 /* .tbss is special. It doesn't contribute to p_memsz of
4320 else if ((flags & SEC_THREAD_LOCAL) == 0
4321 || p->p_type == PT_TLS)
4323 /* The section VMA must equal the file position
4324 modulo the page size. */
4325 bfd_size_type page = align;
4326 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > page)
4327 page = bed->maxpagesize;
4328 adjust = vma_page_aligned_bias (sec->vma,
4329 p->p_vaddr + p->p_memsz,
4331 p->p_memsz += adjust;
4335 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4337 /* The section at i == 0 is the one that actually contains
4343 p->p_filesz = sec->size;
4349 /* The rest are fake sections that shouldn't be written. */
4358 if (p->p_type == PT_LOAD)
4361 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4362 1997, and the exact reason for it isn't clear. One
4363 plausible explanation is that it is to work around
4364 a problem we have with linker scripts using data
4365 statements in NOLOAD sections. I don't think it
4366 makes a great deal of sense to have such a section
4367 assigned to a PT_LOAD segment, but apparently
4368 people do this. The data statement results in a
4369 bfd_data_link_order being built, and these need
4370 section contents to write into. Eventually, we get
4371 to _bfd_elf_write_object_contents which writes any
4372 section with contents to the output. Make room
4373 here for the write, so that following segments are
4375 if ((flags & SEC_LOAD) != 0
4376 || (flags & SEC_HAS_CONTENTS) != 0)
4380 if ((flags & SEC_LOAD) != 0)
4382 p->p_filesz += sec->size;
4383 p->p_memsz += sec->size;
4385 /* PR ld/594: Sections in note segments which are not loaded
4386 contribute to the file size but not the in-memory size. */
4387 else if (p->p_type == PT_NOTE
4388 && (flags & SEC_HAS_CONTENTS) != 0)
4389 p->p_filesz += sec->size;
4391 /* .tbss is special. It doesn't contribute to p_memsz of
4393 else if ((flags & SEC_THREAD_LOCAL) == 0
4394 || p->p_type == PT_TLS)
4395 p->p_memsz += sec->size;
4397 if (p->p_type == PT_TLS
4399 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4401 struct bfd_link_order *o;
4402 bfd_vma tbss_size = 0;
4404 for (o = sec->map_head.link_order; o != NULL; o = o->next)
4405 if (tbss_size < o->offset + o->size)
4406 tbss_size = o->offset + o->size;
4408 p->p_memsz += tbss_size;
4411 if (align > p->p_align
4412 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4416 if (! m->p_flags_valid)
4419 if ((flags & SEC_CODE) != 0)
4421 if ((flags & SEC_READONLY) == 0)
4427 /* Now that we have set the section file positions, we can set up
4428 the file positions for the non PT_LOAD segments. */
4429 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4433 if (p->p_type != PT_LOAD && m->count > 0)
4435 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4436 /* If the section has not yet been assigned a file position,
4437 do so now. The ARM BPABI requires that .dynamic section
4438 not be marked SEC_ALLOC because it is not part of any
4439 PT_LOAD segment, so it will not be processed above. */
4440 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4443 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4446 while (i_shdrpp[i]->bfd_section != m->sections[0])
4448 off = (_bfd_elf_assign_file_position_for_section
4449 (i_shdrpp[i], off, TRUE));
4450 p->p_filesz = m->sections[0]->size;
4452 p->p_offset = m->sections[0]->filepos;
4456 if (m->includes_filehdr)
4458 p->p_vaddr = filehdr_vaddr;
4459 if (! m->p_paddr_valid)
4460 p->p_paddr = filehdr_paddr;
4462 else if (m->includes_phdrs)
4464 p->p_vaddr = phdrs_vaddr;
4465 if (! m->p_paddr_valid)
4466 p->p_paddr = phdrs_paddr;
4468 else if (p->p_type == PT_GNU_RELRO)
4470 Elf_Internal_Phdr *lp;
4472 for (lp = phdrs; lp < phdrs + count; ++lp)
4474 if (lp->p_type == PT_LOAD
4475 && lp->p_vaddr <= link_info->relro_end
4476 && lp->p_vaddr >= link_info->relro_start
4477 && lp->p_vaddr + lp->p_filesz
4478 >= link_info->relro_end)
4482 if (lp < phdrs + count
4483 && link_info->relro_end > lp->p_vaddr)
4485 p->p_vaddr = lp->p_vaddr;
4486 p->p_paddr = lp->p_paddr;
4487 p->p_offset = lp->p_offset;
4488 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4489 p->p_memsz = p->p_filesz;
4491 p->p_flags = (lp->p_flags & ~PF_W);
4495 memset (p, 0, sizeof *p);
4496 p->p_type = PT_NULL;
4502 /* Clear out any program headers we allocated but did not use. */
4503 for (; count < alloc; count++, p++)
4505 memset (p, 0, sizeof *p);
4506 p->p_type = PT_NULL;
4509 elf_tdata (abfd)->phdr = phdrs;
4511 elf_tdata (abfd)->next_file_pos = off;
4513 /* Write out the program headers. */
4514 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4515 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4521 /* Get the size of the program header.
4523 If this is called by the linker before any of the section VMA's are set, it
4524 can't calculate the correct value for a strange memory layout. This only
4525 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4526 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4527 data segment (exclusive of .interp and .dynamic).
4529 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4530 will be two segments. */
4532 static bfd_size_type
4533 get_program_header_size (bfd *abfd)
4537 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4539 /* We can't return a different result each time we're called. */
4540 if (elf_tdata (abfd)->program_header_size != 0)
4541 return elf_tdata (abfd)->program_header_size;
4543 if (elf_tdata (abfd)->segment_map != NULL)
4545 struct elf_segment_map *m;
4548 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4550 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4551 return elf_tdata (abfd)->program_header_size;
4554 /* Assume we will need exactly two PT_LOAD segments: one for text
4555 and one for data. */
4558 s = bfd_get_section_by_name (abfd, ".interp");
4559 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4561 /* If we have a loadable interpreter section, we need a
4562 PT_INTERP segment. In this case, assume we also need a
4563 PT_PHDR segment, although that may not be true for all
4568 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4570 /* We need a PT_DYNAMIC segment. */
4574 if (elf_tdata (abfd)->eh_frame_hdr)
4576 /* We need a PT_GNU_EH_FRAME segment. */
4580 if (elf_tdata (abfd)->stack_flags)
4582 /* We need a PT_GNU_STACK segment. */
4586 if (elf_tdata (abfd)->relro)
4588 /* We need a PT_GNU_RELRO segment. */
4592 for (s = abfd->sections; s != NULL; s = s->next)
4594 if ((s->flags & SEC_LOAD) != 0
4595 && strncmp (s->name, ".note", 5) == 0)
4597 /* We need a PT_NOTE segment. */
4602 for (s = abfd->sections; s != NULL; s = s->next)
4604 if (s->flags & SEC_THREAD_LOCAL)
4606 /* We need a PT_TLS segment. */
4612 /* Let the backend count up any program headers it might need. */
4613 if (bed->elf_backend_additional_program_headers)
4617 a = (*bed->elf_backend_additional_program_headers) (abfd);
4623 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4624 return elf_tdata (abfd)->program_header_size;
4627 /* Work out the file positions of all the sections. This is called by
4628 _bfd_elf_compute_section_file_positions. All the section sizes and
4629 VMAs must be known before this is called.
4631 Reloc sections come in two flavours: Those processed specially as
4632 "side-channel" data attached to a section to which they apply, and
4633 those that bfd doesn't process as relocations. The latter sort are
4634 stored in a normal bfd section by bfd_section_from_shdr. We don't
4635 consider the former sort here, unless they form part of the loadable
4636 image. Reloc sections not assigned here will be handled later by
4637 assign_file_positions_for_relocs.
4639 We also don't set the positions of the .symtab and .strtab here. */
4642 assign_file_positions_except_relocs (bfd *abfd,
4643 struct bfd_link_info *link_info)
4645 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4646 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4647 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4648 unsigned int num_sec = elf_numsections (abfd);
4650 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4652 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4653 && bfd_get_format (abfd) != bfd_core)
4655 Elf_Internal_Shdr **hdrpp;
4658 /* Start after the ELF header. */
4659 off = i_ehdrp->e_ehsize;
4661 /* We are not creating an executable, which means that we are
4662 not creating a program header, and that the actual order of
4663 the sections in the file is unimportant. */
4664 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4666 Elf_Internal_Shdr *hdr;
4669 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4670 && hdr->bfd_section == NULL)
4671 || i == tdata->symtab_section
4672 || i == tdata->symtab_shndx_section
4673 || i == tdata->strtab_section)
4675 hdr->sh_offset = -1;
4678 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4680 if (i == SHN_LORESERVE - 1)
4682 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4683 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4690 Elf_Internal_Shdr **hdrpp;
4692 /* Assign file positions for the loaded sections based on the
4693 assignment of sections to segments. */
4694 if (! assign_file_positions_for_segments (abfd, link_info))
4697 /* Assign file positions for the other sections. */
4699 off = elf_tdata (abfd)->next_file_pos;
4700 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4702 Elf_Internal_Shdr *hdr;
4705 if (hdr->bfd_section != NULL
4706 && hdr->bfd_section->filepos != 0)
4707 hdr->sh_offset = hdr->bfd_section->filepos;
4708 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4710 ((*_bfd_error_handler)
4711 (_("%B: warning: allocated section `%s' not in segment"),
4713 (hdr->bfd_section == NULL
4715 : hdr->bfd_section->name)));
4716 if ((abfd->flags & D_PAGED) != 0)
4717 off += vma_page_aligned_bias (hdr->sh_addr, off,
4720 off += vma_page_aligned_bias (hdr->sh_addr, off,
4722 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4725 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4726 && hdr->bfd_section == NULL)
4727 || hdr == i_shdrpp[tdata->symtab_section]
4728 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4729 || hdr == i_shdrpp[tdata->strtab_section])
4730 hdr->sh_offset = -1;
4732 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4734 if (i == SHN_LORESERVE - 1)
4736 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4737 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4742 /* Place the section headers. */
4743 off = align_file_position (off, 1 << bed->s->log_file_align);
4744 i_ehdrp->e_shoff = off;
4745 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4747 elf_tdata (abfd)->next_file_pos = off;
4753 prep_headers (bfd *abfd)
4755 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4756 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4757 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4758 struct elf_strtab_hash *shstrtab;
4759 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4761 i_ehdrp = elf_elfheader (abfd);
4762 i_shdrp = elf_elfsections (abfd);
4764 shstrtab = _bfd_elf_strtab_init ();
4765 if (shstrtab == NULL)
4768 elf_shstrtab (abfd) = shstrtab;
4770 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4771 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4772 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4773 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4775 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4776 i_ehdrp->e_ident[EI_DATA] =
4777 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4778 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4780 if ((abfd->flags & DYNAMIC) != 0)
4781 i_ehdrp->e_type = ET_DYN;
4782 else if ((abfd->flags & EXEC_P) != 0)
4783 i_ehdrp->e_type = ET_EXEC;
4784 else if (bfd_get_format (abfd) == bfd_core)
4785 i_ehdrp->e_type = ET_CORE;
4787 i_ehdrp->e_type = ET_REL;
4789 switch (bfd_get_arch (abfd))
4791 case bfd_arch_unknown:
4792 i_ehdrp->e_machine = EM_NONE;
4795 /* There used to be a long list of cases here, each one setting
4796 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4797 in the corresponding bfd definition. To avoid duplication,
4798 the switch was removed. Machines that need special handling
4799 can generally do it in elf_backend_final_write_processing(),
4800 unless they need the information earlier than the final write.
4801 Such need can generally be supplied by replacing the tests for
4802 e_machine with the conditions used to determine it. */
4804 i_ehdrp->e_machine = bed->elf_machine_code;
4807 i_ehdrp->e_version = bed->s->ev_current;
4808 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4810 /* No program header, for now. */
4811 i_ehdrp->e_phoff = 0;
4812 i_ehdrp->e_phentsize = 0;
4813 i_ehdrp->e_phnum = 0;
4815 /* Each bfd section is section header entry. */
4816 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4817 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4819 /* If we're building an executable, we'll need a program header table. */
4820 if (abfd->flags & EXEC_P)
4821 /* It all happens later. */
4825 i_ehdrp->e_phentsize = 0;
4827 i_ehdrp->e_phoff = 0;
4830 elf_tdata (abfd)->symtab_hdr.sh_name =
4831 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4832 elf_tdata (abfd)->strtab_hdr.sh_name =
4833 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4834 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4835 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4836 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4837 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4838 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4844 /* Assign file positions for all the reloc sections which are not part
4845 of the loadable file image. */
4848 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4851 unsigned int i, num_sec;
4852 Elf_Internal_Shdr **shdrpp;
4854 off = elf_tdata (abfd)->next_file_pos;
4856 num_sec = elf_numsections (abfd);
4857 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4859 Elf_Internal_Shdr *shdrp;
4862 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4863 && shdrp->sh_offset == -1)
4864 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4867 elf_tdata (abfd)->next_file_pos = off;
4871 _bfd_elf_write_object_contents (bfd *abfd)
4873 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4874 Elf_Internal_Ehdr *i_ehdrp;
4875 Elf_Internal_Shdr **i_shdrp;
4877 unsigned int count, num_sec;
4879 if (! abfd->output_has_begun
4880 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4883 i_shdrp = elf_elfsections (abfd);
4884 i_ehdrp = elf_elfheader (abfd);
4887 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4891 _bfd_elf_assign_file_positions_for_relocs (abfd);
4893 /* After writing the headers, we need to write the sections too... */
4894 num_sec = elf_numsections (abfd);
4895 for (count = 1; count < num_sec; count++)
4897 if (bed->elf_backend_section_processing)
4898 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4899 if (i_shdrp[count]->contents)
4901 bfd_size_type amt = i_shdrp[count]->sh_size;
4903 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4904 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4907 if (count == SHN_LORESERVE - 1)
4908 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4911 /* Write out the section header names. */
4912 if (elf_shstrtab (abfd) != NULL
4913 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4914 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4917 if (bed->elf_backend_final_write_processing)
4918 (*bed->elf_backend_final_write_processing) (abfd,
4919 elf_tdata (abfd)->linker);
4921 return bed->s->write_shdrs_and_ehdr (abfd);
4925 _bfd_elf_write_corefile_contents (bfd *abfd)
4927 /* Hopefully this can be done just like an object file. */
4928 return _bfd_elf_write_object_contents (abfd);
4931 /* Given a section, search the header to find them. */
4934 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4936 const struct elf_backend_data *bed;
4939 if (elf_section_data (asect) != NULL
4940 && elf_section_data (asect)->this_idx != 0)
4941 return elf_section_data (asect)->this_idx;
4943 if (bfd_is_abs_section (asect))
4945 else if (bfd_is_com_section (asect))
4947 else if (bfd_is_und_section (asect))
4952 bed = get_elf_backend_data (abfd);
4953 if (bed->elf_backend_section_from_bfd_section)
4957 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4962 bfd_set_error (bfd_error_nonrepresentable_section);
4967 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4971 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4973 asymbol *asym_ptr = *asym_ptr_ptr;
4975 flagword flags = asym_ptr->flags;
4977 /* When gas creates relocations against local labels, it creates its
4978 own symbol for the section, but does put the symbol into the
4979 symbol chain, so udata is 0. When the linker is generating
4980 relocatable output, this section symbol may be for one of the
4981 input sections rather than the output section. */
4982 if (asym_ptr->udata.i == 0
4983 && (flags & BSF_SECTION_SYM)
4984 && asym_ptr->section)
4988 if (asym_ptr->section->output_section != NULL)
4989 indx = asym_ptr->section->output_section->index;
4991 indx = asym_ptr->section->index;
4992 if (indx < elf_num_section_syms (abfd)
4993 && elf_section_syms (abfd)[indx] != NULL)
4994 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4997 idx = asym_ptr->udata.i;
5001 /* This case can occur when using --strip-symbol on a symbol
5002 which is used in a relocation entry. */
5003 (*_bfd_error_handler)
5004 (_("%B: symbol `%s' required but not present"),
5005 abfd, bfd_asymbol_name (asym_ptr));
5006 bfd_set_error (bfd_error_no_symbols);
5013 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5014 (long) asym_ptr, asym_ptr->name, idx, flags,
5015 elf_symbol_flags (flags));
5023 /* Copy private BFD data. This copies any program header information. */
5026 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5028 Elf_Internal_Ehdr *iehdr;
5029 struct elf_segment_map *map;
5030 struct elf_segment_map *map_first;
5031 struct elf_segment_map **pointer_to_map;
5032 Elf_Internal_Phdr *segment;
5035 unsigned int num_segments;
5036 bfd_boolean phdr_included = FALSE;
5037 bfd_vma maxpagesize;
5038 struct elf_segment_map *phdr_adjust_seg = NULL;
5039 unsigned int phdr_adjust_num = 0;
5040 const struct elf_backend_data *bed;
5042 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5043 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5046 if (elf_tdata (ibfd)->phdr == NULL)
5049 bed = get_elf_backend_data (ibfd);
5050 iehdr = elf_elfheader (ibfd);
5053 pointer_to_map = &map_first;
5055 num_segments = elf_elfheader (ibfd)->e_phnum;
5056 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5058 /* Returns the end address of the segment + 1. */
5059 #define SEGMENT_END(segment, start) \
5060 (start + (segment->p_memsz > segment->p_filesz \
5061 ? segment->p_memsz : segment->p_filesz))
5063 #define SECTION_SIZE(section, segment) \
5064 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5065 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5066 ? section->size : 0)
5068 /* Returns TRUE if the given section is contained within
5069 the given segment. VMA addresses are compared. */
5070 #define IS_CONTAINED_BY_VMA(section, segment) \
5071 (section->vma >= segment->p_vaddr \
5072 && (section->vma + SECTION_SIZE (section, segment) \
5073 <= (SEGMENT_END (segment, segment->p_vaddr))))
5075 /* Returns TRUE if the given section is contained within
5076 the given segment. LMA addresses are compared. */
5077 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5078 (section->lma >= base \
5079 && (section->lma + SECTION_SIZE (section, segment) \
5080 <= SEGMENT_END (segment, base)))
5082 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5083 #define IS_COREFILE_NOTE(p, s) \
5084 (p->p_type == PT_NOTE \
5085 && bfd_get_format (ibfd) == bfd_core \
5086 && s->vma == 0 && s->lma == 0 \
5087 && (bfd_vma) s->filepos >= p->p_offset \
5088 && ((bfd_vma) s->filepos + s->size \
5089 <= p->p_offset + p->p_filesz))
5091 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5092 linker, which generates a PT_INTERP section with p_vaddr and
5093 p_memsz set to 0. */
5094 #define IS_SOLARIS_PT_INTERP(p, s) \
5096 && p->p_paddr == 0 \
5097 && p->p_memsz == 0 \
5098 && p->p_filesz > 0 \
5099 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5101 && (bfd_vma) s->filepos >= p->p_offset \
5102 && ((bfd_vma) s->filepos + s->size \
5103 <= p->p_offset + p->p_filesz))
5105 /* Decide if the given section should be included in the given segment.
5106 A section will be included if:
5107 1. It is within the address space of the segment -- we use the LMA
5108 if that is set for the segment and the VMA otherwise,
5109 2. It is an allocated segment,
5110 3. There is an output section associated with it,
5111 4. The section has not already been allocated to a previous segment.
5112 5. PT_GNU_STACK segments do not include any sections.
5113 6. PT_TLS segment includes only SHF_TLS sections.
5114 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5115 8. PT_DYNAMIC should not contain empty sections at the beginning
5116 (with the possible exception of .dynamic). */
5117 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5118 ((((segment->p_paddr \
5119 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5120 : IS_CONTAINED_BY_VMA (section, segment)) \
5121 && (section->flags & SEC_ALLOC) != 0) \
5122 || IS_COREFILE_NOTE (segment, section)) \
5123 && section->output_section != NULL \
5124 && segment->p_type != PT_GNU_STACK \
5125 && (segment->p_type != PT_TLS \
5126 || (section->flags & SEC_THREAD_LOCAL)) \
5127 && (segment->p_type == PT_LOAD \
5128 || segment->p_type == PT_TLS \
5129 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5130 && (segment->p_type != PT_DYNAMIC \
5131 || SECTION_SIZE (section, segment) > 0 \
5132 || (segment->p_paddr \
5133 ? segment->p_paddr != section->lma \
5134 : segment->p_vaddr != section->vma) \
5135 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5137 && ! section->segment_mark)
5139 /* Returns TRUE iff seg1 starts after the end of seg2. */
5140 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5141 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5143 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5144 their VMA address ranges and their LMA address ranges overlap.
5145 It is possible to have overlapping VMA ranges without overlapping LMA
5146 ranges. RedBoot images for example can have both .data and .bss mapped
5147 to the same VMA range, but with the .data section mapped to a different
5149 #define SEGMENT_OVERLAPS(seg1, seg2) \
5150 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5151 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5152 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5153 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5155 /* Initialise the segment mark field. */
5156 for (section = ibfd->sections; section != NULL; section = section->next)
5157 section->segment_mark = FALSE;
5159 /* Scan through the segments specified in the program header
5160 of the input BFD. For this first scan we look for overlaps
5161 in the loadable segments. These can be created by weird
5162 parameters to objcopy. Also, fix some solaris weirdness. */
5163 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5168 Elf_Internal_Phdr *segment2;
5170 if (segment->p_type == PT_INTERP)
5171 for (section = ibfd->sections; section; section = section->next)
5172 if (IS_SOLARIS_PT_INTERP (segment, section))
5174 /* Mininal change so that the normal section to segment
5175 assignment code will work. */
5176 segment->p_vaddr = section->vma;
5180 if (segment->p_type != PT_LOAD)
5183 /* Determine if this segment overlaps any previous segments. */
5184 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5186 bfd_signed_vma extra_length;
5188 if (segment2->p_type != PT_LOAD
5189 || ! SEGMENT_OVERLAPS (segment, segment2))
5192 /* Merge the two segments together. */
5193 if (segment2->p_vaddr < segment->p_vaddr)
5195 /* Extend SEGMENT2 to include SEGMENT and then delete
5198 SEGMENT_END (segment, segment->p_vaddr)
5199 - SEGMENT_END (segment2, segment2->p_vaddr);
5201 if (extra_length > 0)
5203 segment2->p_memsz += extra_length;
5204 segment2->p_filesz += extra_length;
5207 segment->p_type = PT_NULL;
5209 /* Since we have deleted P we must restart the outer loop. */
5211 segment = elf_tdata (ibfd)->phdr;
5216 /* Extend SEGMENT to include SEGMENT2 and then delete
5219 SEGMENT_END (segment2, segment2->p_vaddr)
5220 - SEGMENT_END (segment, segment->p_vaddr);
5222 if (extra_length > 0)
5224 segment->p_memsz += extra_length;
5225 segment->p_filesz += extra_length;
5228 segment2->p_type = PT_NULL;
5233 /* The second scan attempts to assign sections to segments. */
5234 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5238 unsigned int section_count;
5239 asection ** sections;
5240 asection * output_section;
5242 bfd_vma matching_lma;
5243 bfd_vma suggested_lma;
5247 if (segment->p_type == PT_NULL)
5250 /* Compute how many sections might be placed into this segment. */
5251 for (section = ibfd->sections, section_count = 0;
5253 section = section->next)
5254 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5257 /* Allocate a segment map big enough to contain
5258 all of the sections we have selected. */
5259 amt = sizeof (struct elf_segment_map);
5260 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5261 map = bfd_alloc (obfd, amt);
5265 /* Initialise the fields of the segment map. Default to
5266 using the physical address of the segment in the input BFD. */
5268 map->p_type = segment->p_type;
5269 map->p_flags = segment->p_flags;
5270 map->p_flags_valid = 1;
5271 map->p_paddr = segment->p_paddr;
5272 map->p_paddr_valid = 1;
5274 /* Determine if this segment contains the ELF file header
5275 and if it contains the program headers themselves. */
5276 map->includes_filehdr = (segment->p_offset == 0
5277 && segment->p_filesz >= iehdr->e_ehsize);
5279 map->includes_phdrs = 0;
5281 if (! phdr_included || segment->p_type != PT_LOAD)
5283 map->includes_phdrs =
5284 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5285 && (segment->p_offset + segment->p_filesz
5286 >= ((bfd_vma) iehdr->e_phoff
5287 + iehdr->e_phnum * iehdr->e_phentsize)));
5289 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5290 phdr_included = TRUE;
5293 if (section_count == 0)
5295 /* Special segments, such as the PT_PHDR segment, may contain
5296 no sections, but ordinary, loadable segments should contain
5297 something. They are allowed by the ELF spec however, so only
5298 a warning is produced. */
5299 if (segment->p_type == PT_LOAD)
5300 (*_bfd_error_handler)
5301 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5305 *pointer_to_map = map;
5306 pointer_to_map = &map->next;
5311 /* Now scan the sections in the input BFD again and attempt
5312 to add their corresponding output sections to the segment map.
5313 The problem here is how to handle an output section which has
5314 been moved (ie had its LMA changed). There are four possibilities:
5316 1. None of the sections have been moved.
5317 In this case we can continue to use the segment LMA from the
5320 2. All of the sections have been moved by the same amount.
5321 In this case we can change the segment's LMA to match the LMA
5322 of the first section.
5324 3. Some of the sections have been moved, others have not.
5325 In this case those sections which have not been moved can be
5326 placed in the current segment which will have to have its size,
5327 and possibly its LMA changed, and a new segment or segments will
5328 have to be created to contain the other sections.
5330 4. The sections have been moved, but not by the same amount.
5331 In this case we can change the segment's LMA to match the LMA
5332 of the first section and we will have to create a new segment
5333 or segments to contain the other sections.
5335 In order to save time, we allocate an array to hold the section
5336 pointers that we are interested in. As these sections get assigned
5337 to a segment, they are removed from this array. */
5339 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5340 to work around this long long bug. */
5341 sections = bfd_malloc2 (section_count, sizeof (asection *));
5342 if (sections == NULL)
5345 /* Step One: Scan for segment vs section LMA conflicts.
5346 Also add the sections to the section array allocated above.
5347 Also add the sections to the current segment. In the common
5348 case, where the sections have not been moved, this means that
5349 we have completely filled the segment, and there is nothing
5355 for (j = 0, section = ibfd->sections;
5357 section = section->next)
5359 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5361 output_section = section->output_section;
5363 sections[j ++] = section;
5365 /* The Solaris native linker always sets p_paddr to 0.
5366 We try to catch that case here, and set it to the
5367 correct value. Note - some backends require that
5368 p_paddr be left as zero. */
5369 if (segment->p_paddr == 0
5370 && segment->p_vaddr != 0
5371 && (! bed->want_p_paddr_set_to_zero)
5373 && output_section->lma != 0
5374 && (output_section->vma == (segment->p_vaddr
5375 + (map->includes_filehdr
5378 + (map->includes_phdrs
5380 * iehdr->e_phentsize)
5382 map->p_paddr = segment->p_vaddr;
5384 /* Match up the physical address of the segment with the
5385 LMA address of the output section. */
5386 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5387 || IS_COREFILE_NOTE (segment, section)
5388 || (bed->want_p_paddr_set_to_zero &&
5389 IS_CONTAINED_BY_VMA (output_section, segment))
5392 if (matching_lma == 0)
5393 matching_lma = output_section->lma;
5395 /* We assume that if the section fits within the segment
5396 then it does not overlap any other section within that
5398 map->sections[isec ++] = output_section;
5400 else if (suggested_lma == 0)
5401 suggested_lma = output_section->lma;
5405 BFD_ASSERT (j == section_count);
5407 /* Step Two: Adjust the physical address of the current segment,
5409 if (isec == section_count)
5411 /* All of the sections fitted within the segment as currently
5412 specified. This is the default case. Add the segment to
5413 the list of built segments and carry on to process the next
5414 program header in the input BFD. */
5415 map->count = section_count;
5416 *pointer_to_map = map;
5417 pointer_to_map = &map->next;
5424 if (matching_lma != 0)
5426 /* At least one section fits inside the current segment.
5427 Keep it, but modify its physical address to match the
5428 LMA of the first section that fitted. */
5429 map->p_paddr = matching_lma;
5433 /* None of the sections fitted inside the current segment.
5434 Change the current segment's physical address to match
5435 the LMA of the first section. */
5436 map->p_paddr = suggested_lma;
5439 /* Offset the segment physical address from the lma
5440 to allow for space taken up by elf headers. */
5441 if (map->includes_filehdr)
5442 map->p_paddr -= iehdr->e_ehsize;
5444 if (map->includes_phdrs)
5446 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5448 /* iehdr->e_phnum is just an estimate of the number
5449 of program headers that we will need. Make a note
5450 here of the number we used and the segment we chose
5451 to hold these headers, so that we can adjust the
5452 offset when we know the correct value. */
5453 phdr_adjust_num = iehdr->e_phnum;
5454 phdr_adjust_seg = map;
5458 /* Step Three: Loop over the sections again, this time assigning
5459 those that fit to the current segment and removing them from the
5460 sections array; but making sure not to leave large gaps. Once all
5461 possible sections have been assigned to the current segment it is
5462 added to the list of built segments and if sections still remain
5463 to be assigned, a new segment is constructed before repeating
5471 /* Fill the current segment with sections that fit. */
5472 for (j = 0; j < section_count; j++)
5474 section = sections[j];
5476 if (section == NULL)
5479 output_section = section->output_section;
5481 BFD_ASSERT (output_section != NULL);
5483 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5484 || IS_COREFILE_NOTE (segment, section))
5486 if (map->count == 0)
5488 /* If the first section in a segment does not start at
5489 the beginning of the segment, then something is
5491 if (output_section->lma !=
5493 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5494 + (map->includes_phdrs
5495 ? iehdr->e_phnum * iehdr->e_phentsize
5501 asection * prev_sec;
5503 prev_sec = map->sections[map->count - 1];
5505 /* If the gap between the end of the previous section
5506 and the start of this section is more than
5507 maxpagesize then we need to start a new segment. */
5508 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5510 < BFD_ALIGN (output_section->lma, maxpagesize))
5511 || ((prev_sec->lma + prev_sec->size)
5512 > output_section->lma))
5514 if (suggested_lma == 0)
5515 suggested_lma = output_section->lma;
5521 map->sections[map->count++] = output_section;
5524 section->segment_mark = TRUE;
5526 else if (suggested_lma == 0)
5527 suggested_lma = output_section->lma;
5530 BFD_ASSERT (map->count > 0);
5532 /* Add the current segment to the list of built segments. */
5533 *pointer_to_map = map;
5534 pointer_to_map = &map->next;
5536 if (isec < section_count)
5538 /* We still have not allocated all of the sections to
5539 segments. Create a new segment here, initialise it
5540 and carry on looping. */
5541 amt = sizeof (struct elf_segment_map);
5542 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5543 map = bfd_alloc (obfd, amt);
5550 /* Initialise the fields of the segment map. Set the physical
5551 physical address to the LMA of the first section that has
5552 not yet been assigned. */
5554 map->p_type = segment->p_type;
5555 map->p_flags = segment->p_flags;
5556 map->p_flags_valid = 1;
5557 map->p_paddr = suggested_lma;
5558 map->p_paddr_valid = 1;
5559 map->includes_filehdr = 0;
5560 map->includes_phdrs = 0;
5563 while (isec < section_count);
5568 /* The Solaris linker creates program headers in which all the
5569 p_paddr fields are zero. When we try to objcopy or strip such a
5570 file, we get confused. Check for this case, and if we find it
5571 reset the p_paddr_valid fields. */
5572 for (map = map_first; map != NULL; map = map->next)
5573 if (map->p_paddr != 0)
5576 for (map = map_first; map != NULL; map = map->next)
5577 map->p_paddr_valid = 0;
5579 elf_tdata (obfd)->segment_map = map_first;
5581 /* If we had to estimate the number of program headers that were
5582 going to be needed, then check our estimate now and adjust
5583 the offset if necessary. */
5584 if (phdr_adjust_seg != NULL)
5588 for (count = 0, map = map_first; map != NULL; map = map->next)
5591 if (count > phdr_adjust_num)
5592 phdr_adjust_seg->p_paddr
5593 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5598 #undef IS_CONTAINED_BY_VMA
5599 #undef IS_CONTAINED_BY_LMA
5600 #undef IS_COREFILE_NOTE
5601 #undef IS_SOLARIS_PT_INTERP
5602 #undef INCLUDE_SECTION_IN_SEGMENT
5603 #undef SEGMENT_AFTER_SEGMENT
5604 #undef SEGMENT_OVERLAPS
5608 /* Initialize private output section information from input section. */
5611 _bfd_elf_init_private_section_data (bfd *ibfd,
5615 struct bfd_link_info *link_info)
5618 Elf_Internal_Shdr *ihdr, *ohdr;
5619 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5621 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5622 || obfd->xvec->flavour != bfd_target_elf_flavour)
5625 /* FIXME: What if the output ELF section type has been set to
5626 something different? */
5627 if (elf_section_type (osec) == SHT_NULL)
5628 elf_section_type (osec) = elf_section_type (isec);
5630 /* Set things up for objcopy and relocatable link. The output
5631 SHT_GROUP section will have its elf_next_in_group pointing back
5632 to the input group members. Ignore linker created group section.
5633 See elfNN_ia64_object_p in elfxx-ia64.c. */
5637 if (elf_sec_group (isec) == NULL
5638 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5640 if (elf_section_flags (isec) & SHF_GROUP)
5641 elf_section_flags (osec) |= SHF_GROUP;
5642 elf_next_in_group (osec) = elf_next_in_group (isec);
5643 elf_group_name (osec) = elf_group_name (isec);
5647 ihdr = &elf_section_data (isec)->this_hdr;
5649 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5650 don't use the output section of the linked-to section since it
5651 may be NULL at this point. */
5652 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5654 ohdr = &elf_section_data (osec)->this_hdr;
5655 ohdr->sh_flags |= SHF_LINK_ORDER;
5656 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5659 osec->use_rela_p = isec->use_rela_p;
5664 /* Copy private section information. This copies over the entsize
5665 field, and sometimes the info field. */
5668 _bfd_elf_copy_private_section_data (bfd *ibfd,
5673 Elf_Internal_Shdr *ihdr, *ohdr;
5675 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5676 || obfd->xvec->flavour != bfd_target_elf_flavour)
5679 ihdr = &elf_section_data (isec)->this_hdr;
5680 ohdr = &elf_section_data (osec)->this_hdr;
5682 ohdr->sh_entsize = ihdr->sh_entsize;
5684 if (ihdr->sh_type == SHT_SYMTAB
5685 || ihdr->sh_type == SHT_DYNSYM
5686 || ihdr->sh_type == SHT_GNU_verneed
5687 || ihdr->sh_type == SHT_GNU_verdef)
5688 ohdr->sh_info = ihdr->sh_info;
5690 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5694 /* Copy private header information. */
5697 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5699 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5700 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5703 /* Copy over private BFD data if it has not already been copied.
5704 This must be done here, rather than in the copy_private_bfd_data
5705 entry point, because the latter is called after the section
5706 contents have been set, which means that the program headers have
5707 already been worked out. */
5708 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5710 if (! copy_private_bfd_data (ibfd, obfd))
5717 /* Copy private symbol information. If this symbol is in a section
5718 which we did not map into a BFD section, try to map the section
5719 index correctly. We use special macro definitions for the mapped
5720 section indices; these definitions are interpreted by the
5721 swap_out_syms function. */
5723 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5724 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5725 #define MAP_STRTAB (SHN_HIOS + 3)
5726 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5727 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5730 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5735 elf_symbol_type *isym, *osym;
5737 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5738 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5741 isym = elf_symbol_from (ibfd, isymarg);
5742 osym = elf_symbol_from (obfd, osymarg);
5746 && bfd_is_abs_section (isym->symbol.section))
5750 shndx = isym->internal_elf_sym.st_shndx;
5751 if (shndx == elf_onesymtab (ibfd))
5752 shndx = MAP_ONESYMTAB;
5753 else if (shndx == elf_dynsymtab (ibfd))
5754 shndx = MAP_DYNSYMTAB;
5755 else if (shndx == elf_tdata (ibfd)->strtab_section)
5757 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5758 shndx = MAP_SHSTRTAB;
5759 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5760 shndx = MAP_SYM_SHNDX;
5761 osym->internal_elf_sym.st_shndx = shndx;
5767 /* Swap out the symbols. */
5770 swap_out_syms (bfd *abfd,
5771 struct bfd_strtab_hash **sttp,
5774 const struct elf_backend_data *bed;
5777 struct bfd_strtab_hash *stt;
5778 Elf_Internal_Shdr *symtab_hdr;
5779 Elf_Internal_Shdr *symtab_shndx_hdr;
5780 Elf_Internal_Shdr *symstrtab_hdr;
5781 bfd_byte *outbound_syms;
5782 bfd_byte *outbound_shndx;
5785 bfd_boolean name_local_sections;
5787 if (!elf_map_symbols (abfd))
5790 /* Dump out the symtabs. */
5791 stt = _bfd_elf_stringtab_init ();
5795 bed = get_elf_backend_data (abfd);
5796 symcount = bfd_get_symcount (abfd);
5797 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5798 symtab_hdr->sh_type = SHT_SYMTAB;
5799 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5800 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5801 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5802 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5804 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5805 symstrtab_hdr->sh_type = SHT_STRTAB;
5807 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
5808 if (outbound_syms == NULL)
5810 _bfd_stringtab_free (stt);
5813 symtab_hdr->contents = outbound_syms;
5815 outbound_shndx = NULL;
5816 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5817 if (symtab_shndx_hdr->sh_name != 0)
5819 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5820 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
5821 sizeof (Elf_External_Sym_Shndx));
5822 if (outbound_shndx == NULL)
5824 _bfd_stringtab_free (stt);
5828 symtab_shndx_hdr->contents = outbound_shndx;
5829 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5830 symtab_shndx_hdr->sh_size = amt;
5831 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5832 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5835 /* Now generate the data (for "contents"). */
5837 /* Fill in zeroth symbol and swap it out. */
5838 Elf_Internal_Sym sym;
5844 sym.st_shndx = SHN_UNDEF;
5845 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5846 outbound_syms += bed->s->sizeof_sym;
5847 if (outbound_shndx != NULL)
5848 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5852 = (bed->elf_backend_name_local_section_symbols
5853 && bed->elf_backend_name_local_section_symbols (abfd));
5855 syms = bfd_get_outsymbols (abfd);
5856 for (idx = 0; idx < symcount; idx++)
5858 Elf_Internal_Sym sym;
5859 bfd_vma value = syms[idx]->value;
5860 elf_symbol_type *type_ptr;
5861 flagword flags = syms[idx]->flags;
5864 if (!name_local_sections
5865 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5867 /* Local section symbols have no name. */
5872 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5875 if (sym.st_name == (unsigned long) -1)
5877 _bfd_stringtab_free (stt);
5882 type_ptr = elf_symbol_from (abfd, syms[idx]);
5884 if ((flags & BSF_SECTION_SYM) == 0
5885 && bfd_is_com_section (syms[idx]->section))
5887 /* ELF common symbols put the alignment into the `value' field,
5888 and the size into the `size' field. This is backwards from
5889 how BFD handles it, so reverse it here. */
5890 sym.st_size = value;
5891 if (type_ptr == NULL
5892 || type_ptr->internal_elf_sym.st_value == 0)
5893 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5895 sym.st_value = type_ptr->internal_elf_sym.st_value;
5896 sym.st_shndx = _bfd_elf_section_from_bfd_section
5897 (abfd, syms[idx]->section);
5901 asection *sec = syms[idx]->section;
5904 if (sec->output_section)
5906 value += sec->output_offset;
5907 sec = sec->output_section;
5910 /* Don't add in the section vma for relocatable output. */
5911 if (! relocatable_p)
5913 sym.st_value = value;
5914 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5916 if (bfd_is_abs_section (sec)
5918 && type_ptr->internal_elf_sym.st_shndx != 0)
5920 /* This symbol is in a real ELF section which we did
5921 not create as a BFD section. Undo the mapping done
5922 by copy_private_symbol_data. */
5923 shndx = type_ptr->internal_elf_sym.st_shndx;
5927 shndx = elf_onesymtab (abfd);
5930 shndx = elf_dynsymtab (abfd);
5933 shndx = elf_tdata (abfd)->strtab_section;
5936 shndx = elf_tdata (abfd)->shstrtab_section;
5939 shndx = elf_tdata (abfd)->symtab_shndx_section;
5947 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5953 /* Writing this would be a hell of a lot easier if
5954 we had some decent documentation on bfd, and
5955 knew what to expect of the library, and what to
5956 demand of applications. For example, it
5957 appears that `objcopy' might not set the
5958 section of a symbol to be a section that is
5959 actually in the output file. */
5960 sec2 = bfd_get_section_by_name (abfd, sec->name);
5963 _bfd_error_handler (_("\
5964 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5965 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5967 bfd_set_error (bfd_error_invalid_operation);
5968 _bfd_stringtab_free (stt);
5972 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5973 BFD_ASSERT (shndx != -1);
5977 sym.st_shndx = shndx;
5980 if ((flags & BSF_THREAD_LOCAL) != 0)
5982 else if ((flags & BSF_FUNCTION) != 0)
5984 else if ((flags & BSF_OBJECT) != 0)
5989 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5992 /* Processor-specific types. */
5993 if (type_ptr != NULL
5994 && bed->elf_backend_get_symbol_type)
5995 type = ((*bed->elf_backend_get_symbol_type)
5996 (&type_ptr->internal_elf_sym, type));
5998 if (flags & BSF_SECTION_SYM)
6000 if (flags & BSF_GLOBAL)
6001 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6003 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6005 else if (bfd_is_com_section (syms[idx]->section))
6006 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6007 else if (bfd_is_und_section (syms[idx]->section))
6008 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6012 else if (flags & BSF_FILE)
6013 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6016 int bind = STB_LOCAL;
6018 if (flags & BSF_LOCAL)
6020 else if (flags & BSF_WEAK)
6022 else if (flags & BSF_GLOBAL)
6025 sym.st_info = ELF_ST_INFO (bind, type);
6028 if (type_ptr != NULL)
6029 sym.st_other = type_ptr->internal_elf_sym.st_other;
6033 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6034 outbound_syms += bed->s->sizeof_sym;
6035 if (outbound_shndx != NULL)
6036 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6040 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6041 symstrtab_hdr->sh_type = SHT_STRTAB;
6043 symstrtab_hdr->sh_flags = 0;
6044 symstrtab_hdr->sh_addr = 0;
6045 symstrtab_hdr->sh_entsize = 0;
6046 symstrtab_hdr->sh_link = 0;
6047 symstrtab_hdr->sh_info = 0;
6048 symstrtab_hdr->sh_addralign = 1;
6053 /* Return the number of bytes required to hold the symtab vector.
6055 Note that we base it on the count plus 1, since we will null terminate
6056 the vector allocated based on this size. However, the ELF symbol table
6057 always has a dummy entry as symbol #0, so it ends up even. */
6060 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6064 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6066 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6067 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6069 symtab_size -= sizeof (asymbol *);
6075 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6079 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6081 if (elf_dynsymtab (abfd) == 0)
6083 bfd_set_error (bfd_error_invalid_operation);
6087 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6088 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6090 symtab_size -= sizeof (asymbol *);
6096 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6099 return (asect->reloc_count + 1) * sizeof (arelent *);
6102 /* Canonicalize the relocs. */
6105 _bfd_elf_canonicalize_reloc (bfd *abfd,
6112 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6114 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6117 tblptr = section->relocation;
6118 for (i = 0; i < section->reloc_count; i++)
6119 *relptr++ = tblptr++;
6123 return section->reloc_count;
6127 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6129 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6130 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6133 bfd_get_symcount (abfd) = symcount;
6138 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6139 asymbol **allocation)
6141 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6142 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6145 bfd_get_dynamic_symcount (abfd) = symcount;
6149 /* Return the size required for the dynamic reloc entries. Any loadable
6150 section that was actually installed in the BFD, and has type SHT_REL
6151 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6152 dynamic reloc section. */
6155 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6160 if (elf_dynsymtab (abfd) == 0)
6162 bfd_set_error (bfd_error_invalid_operation);
6166 ret = sizeof (arelent *);
6167 for (s = abfd->sections; s != NULL; s = s->next)
6168 if ((s->flags & SEC_LOAD) != 0
6169 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6170 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6171 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6172 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6173 * sizeof (arelent *));
6178 /* Canonicalize the dynamic relocation entries. Note that we return the
6179 dynamic relocations as a single block, although they are actually
6180 associated with particular sections; the interface, which was
6181 designed for SunOS style shared libraries, expects that there is only
6182 one set of dynamic relocs. Any loadable section that was actually
6183 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6184 dynamic symbol table, is considered to be a dynamic reloc section. */
6187 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6191 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6195 if (elf_dynsymtab (abfd) == 0)
6197 bfd_set_error (bfd_error_invalid_operation);
6201 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6203 for (s = abfd->sections; s != NULL; s = s->next)
6205 if ((s->flags & SEC_LOAD) != 0
6206 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6207 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6208 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6213 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6215 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6217 for (i = 0; i < count; i++)
6228 /* Read in the version information. */
6231 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6233 bfd_byte *contents = NULL;
6234 unsigned int freeidx = 0;
6236 if (elf_dynverref (abfd) != 0)
6238 Elf_Internal_Shdr *hdr;
6239 Elf_External_Verneed *everneed;
6240 Elf_Internal_Verneed *iverneed;
6242 bfd_byte *contents_end;
6244 hdr = &elf_tdata (abfd)->dynverref_hdr;
6246 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6247 sizeof (Elf_Internal_Verneed));
6248 if (elf_tdata (abfd)->verref == NULL)
6251 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6253 contents = bfd_malloc (hdr->sh_size);
6254 if (contents == NULL)
6256 error_return_verref:
6257 elf_tdata (abfd)->verref = NULL;
6258 elf_tdata (abfd)->cverrefs = 0;
6261 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6262 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6263 goto error_return_verref;
6265 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6266 goto error_return_verref;
6268 BFD_ASSERT (sizeof (Elf_External_Verneed)
6269 == sizeof (Elf_External_Vernaux));
6270 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6271 everneed = (Elf_External_Verneed *) contents;
6272 iverneed = elf_tdata (abfd)->verref;
6273 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6275 Elf_External_Vernaux *evernaux;
6276 Elf_Internal_Vernaux *ivernaux;
6279 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6281 iverneed->vn_bfd = abfd;
6283 iverneed->vn_filename =
6284 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6286 if (iverneed->vn_filename == NULL)
6287 goto error_return_verref;
6289 if (iverneed->vn_cnt == 0)
6290 iverneed->vn_auxptr = NULL;
6293 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6294 sizeof (Elf_Internal_Vernaux));
6295 if (iverneed->vn_auxptr == NULL)
6296 goto error_return_verref;
6299 if (iverneed->vn_aux
6300 > (size_t) (contents_end - (bfd_byte *) everneed))
6301 goto error_return_verref;
6303 evernaux = ((Elf_External_Vernaux *)
6304 ((bfd_byte *) everneed + iverneed->vn_aux));
6305 ivernaux = iverneed->vn_auxptr;
6306 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6308 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6310 ivernaux->vna_nodename =
6311 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6312 ivernaux->vna_name);
6313 if (ivernaux->vna_nodename == NULL)
6314 goto error_return_verref;
6316 if (j + 1 < iverneed->vn_cnt)
6317 ivernaux->vna_nextptr = ivernaux + 1;
6319 ivernaux->vna_nextptr = NULL;
6321 if (ivernaux->vna_next
6322 > (size_t) (contents_end - (bfd_byte *) evernaux))
6323 goto error_return_verref;
6325 evernaux = ((Elf_External_Vernaux *)
6326 ((bfd_byte *) evernaux + ivernaux->vna_next));
6328 if (ivernaux->vna_other > freeidx)
6329 freeidx = ivernaux->vna_other;
6332 if (i + 1 < hdr->sh_info)
6333 iverneed->vn_nextref = iverneed + 1;
6335 iverneed->vn_nextref = NULL;
6337 if (iverneed->vn_next
6338 > (size_t) (contents_end - (bfd_byte *) everneed))
6339 goto error_return_verref;
6341 everneed = ((Elf_External_Verneed *)
6342 ((bfd_byte *) everneed + iverneed->vn_next));
6349 if (elf_dynverdef (abfd) != 0)
6351 Elf_Internal_Shdr *hdr;
6352 Elf_External_Verdef *everdef;
6353 Elf_Internal_Verdef *iverdef;
6354 Elf_Internal_Verdef *iverdefarr;
6355 Elf_Internal_Verdef iverdefmem;
6357 unsigned int maxidx;
6358 bfd_byte *contents_end_def, *contents_end_aux;
6360 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6362 contents = bfd_malloc (hdr->sh_size);
6363 if (contents == NULL)
6365 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6366 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6369 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6372 BFD_ASSERT (sizeof (Elf_External_Verdef)
6373 >= sizeof (Elf_External_Verdaux));
6374 contents_end_def = contents + hdr->sh_size
6375 - sizeof (Elf_External_Verdef);
6376 contents_end_aux = contents + hdr->sh_size
6377 - sizeof (Elf_External_Verdaux);
6379 /* We know the number of entries in the section but not the maximum
6380 index. Therefore we have to run through all entries and find
6382 everdef = (Elf_External_Verdef *) contents;
6384 for (i = 0; i < hdr->sh_info; ++i)
6386 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6388 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6389 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6391 if (iverdefmem.vd_next
6392 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6395 everdef = ((Elf_External_Verdef *)
6396 ((bfd_byte *) everdef + iverdefmem.vd_next));
6399 if (default_imported_symver)
6401 if (freeidx > maxidx)
6406 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6407 sizeof (Elf_Internal_Verdef));
6408 if (elf_tdata (abfd)->verdef == NULL)
6411 elf_tdata (abfd)->cverdefs = maxidx;
6413 everdef = (Elf_External_Verdef *) contents;
6414 iverdefarr = elf_tdata (abfd)->verdef;
6415 for (i = 0; i < hdr->sh_info; i++)
6417 Elf_External_Verdaux *everdaux;
6418 Elf_Internal_Verdaux *iverdaux;
6421 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6423 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6425 error_return_verdef:
6426 elf_tdata (abfd)->verdef = NULL;
6427 elf_tdata (abfd)->cverdefs = 0;
6431 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6432 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6434 iverdef->vd_bfd = abfd;
6436 if (iverdef->vd_cnt == 0)
6437 iverdef->vd_auxptr = NULL;
6440 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6441 sizeof (Elf_Internal_Verdaux));
6442 if (iverdef->vd_auxptr == NULL)
6443 goto error_return_verdef;
6447 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6448 goto error_return_verdef;
6450 everdaux = ((Elf_External_Verdaux *)
6451 ((bfd_byte *) everdef + iverdef->vd_aux));
6452 iverdaux = iverdef->vd_auxptr;
6453 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6455 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6457 iverdaux->vda_nodename =
6458 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6459 iverdaux->vda_name);
6460 if (iverdaux->vda_nodename == NULL)
6461 goto error_return_verdef;
6463 if (j + 1 < iverdef->vd_cnt)
6464 iverdaux->vda_nextptr = iverdaux + 1;
6466 iverdaux->vda_nextptr = NULL;
6468 if (iverdaux->vda_next
6469 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6470 goto error_return_verdef;
6472 everdaux = ((Elf_External_Verdaux *)
6473 ((bfd_byte *) everdaux + iverdaux->vda_next));
6476 if (iverdef->vd_cnt)
6477 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6479 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6480 iverdef->vd_nextdef = iverdef + 1;
6482 iverdef->vd_nextdef = NULL;
6484 everdef = ((Elf_External_Verdef *)
6485 ((bfd_byte *) everdef + iverdef->vd_next));
6491 else if (default_imported_symver)
6498 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6499 sizeof (Elf_Internal_Verdef));
6500 if (elf_tdata (abfd)->verdef == NULL)
6503 elf_tdata (abfd)->cverdefs = freeidx;
6506 /* Create a default version based on the soname. */
6507 if (default_imported_symver)
6509 Elf_Internal_Verdef *iverdef;
6510 Elf_Internal_Verdaux *iverdaux;
6512 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6514 iverdef->vd_version = VER_DEF_CURRENT;
6515 iverdef->vd_flags = 0;
6516 iverdef->vd_ndx = freeidx;
6517 iverdef->vd_cnt = 1;
6519 iverdef->vd_bfd = abfd;
6521 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6522 if (iverdef->vd_nodename == NULL)
6523 goto error_return_verdef;
6524 iverdef->vd_nextdef = NULL;
6525 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6526 if (iverdef->vd_auxptr == NULL)
6527 goto error_return_verdef;
6529 iverdaux = iverdef->vd_auxptr;
6530 iverdaux->vda_nodename = iverdef->vd_nodename;
6531 iverdaux->vda_nextptr = NULL;
6537 if (contents != NULL)
6543 _bfd_elf_make_empty_symbol (bfd *abfd)
6545 elf_symbol_type *newsym;
6546 bfd_size_type amt = sizeof (elf_symbol_type);
6548 newsym = bfd_zalloc (abfd, amt);
6553 newsym->symbol.the_bfd = abfd;
6554 return &newsym->symbol;
6559 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6563 bfd_symbol_info (symbol, ret);
6566 /* Return whether a symbol name implies a local symbol. Most targets
6567 use this function for the is_local_label_name entry point, but some
6571 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6574 /* Normal local symbols start with ``.L''. */
6575 if (name[0] == '.' && name[1] == 'L')
6578 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6579 DWARF debugging symbols starting with ``..''. */
6580 if (name[0] == '.' && name[1] == '.')
6583 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6584 emitting DWARF debugging output. I suspect this is actually a
6585 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6586 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6587 underscore to be emitted on some ELF targets). For ease of use,
6588 we treat such symbols as local. */
6589 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6596 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6597 asymbol *symbol ATTRIBUTE_UNUSED)
6604 _bfd_elf_set_arch_mach (bfd *abfd,
6605 enum bfd_architecture arch,
6606 unsigned long machine)
6608 /* If this isn't the right architecture for this backend, and this
6609 isn't the generic backend, fail. */
6610 if (arch != get_elf_backend_data (abfd)->arch
6611 && arch != bfd_arch_unknown
6612 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6615 return bfd_default_set_arch_mach (abfd, arch, machine);
6618 /* Find the function to a particular section and offset,
6619 for error reporting. */
6622 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6626 const char **filename_ptr,
6627 const char **functionname_ptr)
6629 const char *filename;
6630 asymbol *func, *file;
6633 /* ??? Given multiple file symbols, it is impossible to reliably
6634 choose the right file name for global symbols. File symbols are
6635 local symbols, and thus all file symbols must sort before any
6636 global symbols. The ELF spec may be interpreted to say that a
6637 file symbol must sort before other local symbols, but currently
6638 ld -r doesn't do this. So, for ld -r output, it is possible to
6639 make a better choice of file name for local symbols by ignoring
6640 file symbols appearing after a given local symbol. */
6641 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6647 state = nothing_seen;
6649 for (p = symbols; *p != NULL; p++)
6653 q = (elf_symbol_type *) *p;
6655 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6661 if (state == symbol_seen)
6662 state = file_after_symbol_seen;
6668 if (bfd_get_section (&q->symbol) == section
6669 && q->symbol.value >= low_func
6670 && q->symbol.value <= offset)
6672 func = (asymbol *) q;
6673 low_func = q->symbol.value;
6676 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6677 && state == file_after_symbol_seen)
6680 filename = bfd_asymbol_name (file);
6684 if (state == nothing_seen)
6685 state = symbol_seen;
6692 *filename_ptr = filename;
6693 if (functionname_ptr)
6694 *functionname_ptr = bfd_asymbol_name (func);
6699 /* Find the nearest line to a particular section and offset,
6700 for error reporting. */
6703 _bfd_elf_find_nearest_line (bfd *abfd,
6707 const char **filename_ptr,
6708 const char **functionname_ptr,
6709 unsigned int *line_ptr)
6713 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6714 filename_ptr, functionname_ptr,
6717 if (!*functionname_ptr)
6718 elf_find_function (abfd, section, symbols, offset,
6719 *filename_ptr ? NULL : filename_ptr,
6725 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6726 filename_ptr, functionname_ptr,
6728 &elf_tdata (abfd)->dwarf2_find_line_info))
6730 if (!*functionname_ptr)
6731 elf_find_function (abfd, section, symbols, offset,
6732 *filename_ptr ? NULL : filename_ptr,
6738 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6739 &found, filename_ptr,
6740 functionname_ptr, line_ptr,
6741 &elf_tdata (abfd)->line_info))
6743 if (found && (*functionname_ptr || *line_ptr))
6746 if (symbols == NULL)
6749 if (! elf_find_function (abfd, section, symbols, offset,
6750 filename_ptr, functionname_ptr))
6757 /* Find the line for a symbol. */
6760 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
6761 const char **filename_ptr, unsigned int *line_ptr)
6763 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
6764 filename_ptr, line_ptr, 0,
6765 &elf_tdata (abfd)->dwarf2_find_line_info);
6768 /* After a call to bfd_find_nearest_line, successive calls to
6769 bfd_find_inliner_info can be used to get source information about
6770 each level of function inlining that terminated at the address
6771 passed to bfd_find_nearest_line. Currently this is only supported
6772 for DWARF2 with appropriate DWARF3 extensions. */
6775 _bfd_elf_find_inliner_info (bfd *abfd,
6776 const char **filename_ptr,
6777 const char **functionname_ptr,
6778 unsigned int *line_ptr)
6781 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6782 functionname_ptr, line_ptr,
6783 & elf_tdata (abfd)->dwarf2_find_line_info);
6788 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6792 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6794 ret += get_program_header_size (abfd);
6799 _bfd_elf_set_section_contents (bfd *abfd,
6801 const void *location,
6803 bfd_size_type count)
6805 Elf_Internal_Shdr *hdr;
6808 if (! abfd->output_has_begun
6809 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6812 hdr = &elf_section_data (section)->this_hdr;
6813 pos = hdr->sh_offset + offset;
6814 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6815 || bfd_bwrite (location, count, abfd) != count)
6822 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6823 arelent *cache_ptr ATTRIBUTE_UNUSED,
6824 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6829 /* Try to convert a non-ELF reloc into an ELF one. */
6832 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6834 /* Check whether we really have an ELF howto. */
6836 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6838 bfd_reloc_code_real_type code;
6839 reloc_howto_type *howto;
6841 /* Alien reloc: Try to determine its type to replace it with an
6842 equivalent ELF reloc. */
6844 if (areloc->howto->pc_relative)
6846 switch (areloc->howto->bitsize)
6849 code = BFD_RELOC_8_PCREL;
6852 code = BFD_RELOC_12_PCREL;
6855 code = BFD_RELOC_16_PCREL;
6858 code = BFD_RELOC_24_PCREL;
6861 code = BFD_RELOC_32_PCREL;
6864 code = BFD_RELOC_64_PCREL;
6870 howto = bfd_reloc_type_lookup (abfd, code);
6872 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6874 if (howto->pcrel_offset)
6875 areloc->addend += areloc->address;
6877 areloc->addend -= areloc->address; /* addend is unsigned!! */
6882 switch (areloc->howto->bitsize)
6888 code = BFD_RELOC_14;
6891 code = BFD_RELOC_16;
6894 code = BFD_RELOC_26;
6897 code = BFD_RELOC_32;
6900 code = BFD_RELOC_64;
6906 howto = bfd_reloc_type_lookup (abfd, code);
6910 areloc->howto = howto;
6918 (*_bfd_error_handler)
6919 (_("%B: unsupported relocation type %s"),
6920 abfd, areloc->howto->name);
6921 bfd_set_error (bfd_error_bad_value);
6926 _bfd_elf_close_and_cleanup (bfd *abfd)
6928 if (bfd_get_format (abfd) == bfd_object)
6930 if (elf_shstrtab (abfd) != NULL)
6931 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6932 _bfd_dwarf2_cleanup_debug_info (abfd);
6935 return _bfd_generic_close_and_cleanup (abfd);
6938 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6939 in the relocation's offset. Thus we cannot allow any sort of sanity
6940 range-checking to interfere. There is nothing else to do in processing
6943 bfd_reloc_status_type
6944 _bfd_elf_rel_vtable_reloc_fn
6945 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6946 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6947 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6948 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6950 return bfd_reloc_ok;
6953 /* Elf core file support. Much of this only works on native
6954 toolchains, since we rely on knowing the
6955 machine-dependent procfs structure in order to pick
6956 out details about the corefile. */
6958 #ifdef HAVE_SYS_PROCFS_H
6959 # include <sys/procfs.h>
6962 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6965 elfcore_make_pid (bfd *abfd)
6967 return ((elf_tdata (abfd)->core_lwpid << 16)
6968 + (elf_tdata (abfd)->core_pid));
6971 /* If there isn't a section called NAME, make one, using
6972 data from SECT. Note, this function will generate a
6973 reference to NAME, so you shouldn't deallocate or
6977 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6981 if (bfd_get_section_by_name (abfd, name) != NULL)
6984 sect2 = bfd_make_section (abfd, name);
6988 sect2->size = sect->size;
6989 sect2->filepos = sect->filepos;
6990 sect2->flags = sect->flags;
6991 sect2->alignment_power = sect->alignment_power;
6995 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6996 actually creates up to two pseudosections:
6997 - For the single-threaded case, a section named NAME, unless
6998 such a section already exists.
6999 - For the multi-threaded case, a section named "NAME/PID", where
7000 PID is elfcore_make_pid (abfd).
7001 Both pseudosections have identical contents. */
7003 _bfd_elfcore_make_pseudosection (bfd *abfd,
7009 char *threaded_name;
7013 /* Build the section name. */
7015 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7016 len = strlen (buf) + 1;
7017 threaded_name = bfd_alloc (abfd, len);
7018 if (threaded_name == NULL)
7020 memcpy (threaded_name, buf, len);
7022 sect = bfd_make_section_anyway (abfd, threaded_name);
7026 sect->filepos = filepos;
7027 sect->flags = SEC_HAS_CONTENTS;
7028 sect->alignment_power = 2;
7030 return elfcore_maybe_make_sect (abfd, name, sect);
7033 /* prstatus_t exists on:
7035 linux 2.[01] + glibc
7039 #if defined (HAVE_PRSTATUS_T)
7042 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7047 if (note->descsz == sizeof (prstatus_t))
7051 size = sizeof (prstat.pr_reg);
7052 offset = offsetof (prstatus_t, pr_reg);
7053 memcpy (&prstat, note->descdata, sizeof (prstat));
7055 /* Do not overwrite the core signal if it
7056 has already been set by another thread. */
7057 if (elf_tdata (abfd)->core_signal == 0)
7058 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7059 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7061 /* pr_who exists on:
7064 pr_who doesn't exist on:
7067 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7068 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7071 #if defined (HAVE_PRSTATUS32_T)
7072 else if (note->descsz == sizeof (prstatus32_t))
7074 /* 64-bit host, 32-bit corefile */
7075 prstatus32_t prstat;
7077 size = sizeof (prstat.pr_reg);
7078 offset = offsetof (prstatus32_t, pr_reg);
7079 memcpy (&prstat, note->descdata, sizeof (prstat));
7081 /* Do not overwrite the core signal if it
7082 has already been set by another thread. */
7083 if (elf_tdata (abfd)->core_signal == 0)
7084 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7085 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7087 /* pr_who exists on:
7090 pr_who doesn't exist on:
7093 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7094 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7097 #endif /* HAVE_PRSTATUS32_T */
7100 /* Fail - we don't know how to handle any other
7101 note size (ie. data object type). */
7105 /* Make a ".reg/999" section and a ".reg" section. */
7106 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7107 size, note->descpos + offset);
7109 #endif /* defined (HAVE_PRSTATUS_T) */
7111 /* Create a pseudosection containing the exact contents of NOTE. */
7113 elfcore_make_note_pseudosection (bfd *abfd,
7115 Elf_Internal_Note *note)
7117 return _bfd_elfcore_make_pseudosection (abfd, name,
7118 note->descsz, note->descpos);
7121 /* There isn't a consistent prfpregset_t across platforms,
7122 but it doesn't matter, because we don't have to pick this
7123 data structure apart. */
7126 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7128 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7131 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7132 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7136 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7138 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7141 #if defined (HAVE_PRPSINFO_T)
7142 typedef prpsinfo_t elfcore_psinfo_t;
7143 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7144 typedef prpsinfo32_t elfcore_psinfo32_t;
7148 #if defined (HAVE_PSINFO_T)
7149 typedef psinfo_t elfcore_psinfo_t;
7150 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7151 typedef psinfo32_t elfcore_psinfo32_t;
7155 /* return a malloc'ed copy of a string at START which is at
7156 most MAX bytes long, possibly without a terminating '\0'.
7157 the copy will always have a terminating '\0'. */
7160 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7163 char *end = memchr (start, '\0', max);
7171 dups = bfd_alloc (abfd, len + 1);
7175 memcpy (dups, start, len);
7181 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7183 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7185 if (note->descsz == sizeof (elfcore_psinfo_t))
7187 elfcore_psinfo_t psinfo;
7189 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7191 elf_tdata (abfd)->core_program
7192 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7193 sizeof (psinfo.pr_fname));
7195 elf_tdata (abfd)->core_command
7196 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7197 sizeof (psinfo.pr_psargs));
7199 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7200 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7202 /* 64-bit host, 32-bit corefile */
7203 elfcore_psinfo32_t psinfo;
7205 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7207 elf_tdata (abfd)->core_program
7208 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7209 sizeof (psinfo.pr_fname));
7211 elf_tdata (abfd)->core_command
7212 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7213 sizeof (psinfo.pr_psargs));
7219 /* Fail - we don't know how to handle any other
7220 note size (ie. data object type). */
7224 /* Note that for some reason, a spurious space is tacked
7225 onto the end of the args in some (at least one anyway)
7226 implementations, so strip it off if it exists. */
7229 char *command = elf_tdata (abfd)->core_command;
7230 int n = strlen (command);
7232 if (0 < n && command[n - 1] == ' ')
7233 command[n - 1] = '\0';
7238 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7240 #if defined (HAVE_PSTATUS_T)
7242 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7244 if (note->descsz == sizeof (pstatus_t)
7245 #if defined (HAVE_PXSTATUS_T)
7246 || note->descsz == sizeof (pxstatus_t)
7252 memcpy (&pstat, note->descdata, sizeof (pstat));
7254 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7256 #if defined (HAVE_PSTATUS32_T)
7257 else if (note->descsz == sizeof (pstatus32_t))
7259 /* 64-bit host, 32-bit corefile */
7262 memcpy (&pstat, note->descdata, sizeof (pstat));
7264 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7267 /* Could grab some more details from the "representative"
7268 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7269 NT_LWPSTATUS note, presumably. */
7273 #endif /* defined (HAVE_PSTATUS_T) */
7275 #if defined (HAVE_LWPSTATUS_T)
7277 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7279 lwpstatus_t lwpstat;
7285 if (note->descsz != sizeof (lwpstat)
7286 #if defined (HAVE_LWPXSTATUS_T)
7287 && note->descsz != sizeof (lwpxstatus_t)
7292 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7294 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7295 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7297 /* Make a ".reg/999" section. */
7299 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7300 len = strlen (buf) + 1;
7301 name = bfd_alloc (abfd, len);
7304 memcpy (name, buf, len);
7306 sect = bfd_make_section_anyway (abfd, name);
7310 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7311 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7312 sect->filepos = note->descpos
7313 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7316 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7317 sect->size = sizeof (lwpstat.pr_reg);
7318 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7321 sect->flags = SEC_HAS_CONTENTS;
7322 sect->alignment_power = 2;
7324 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7327 /* Make a ".reg2/999" section */
7329 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7330 len = strlen (buf) + 1;
7331 name = bfd_alloc (abfd, len);
7334 memcpy (name, buf, len);
7336 sect = bfd_make_section_anyway (abfd, name);
7340 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7341 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7342 sect->filepos = note->descpos
7343 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7346 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7347 sect->size = sizeof (lwpstat.pr_fpreg);
7348 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7351 sect->flags = SEC_HAS_CONTENTS;
7352 sect->alignment_power = 2;
7354 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7356 #endif /* defined (HAVE_LWPSTATUS_T) */
7358 #if defined (HAVE_WIN32_PSTATUS_T)
7360 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7366 win32_pstatus_t pstatus;
7368 if (note->descsz < sizeof (pstatus))
7371 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7373 switch (pstatus.data_type)
7375 case NOTE_INFO_PROCESS:
7376 /* FIXME: need to add ->core_command. */
7377 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7378 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7381 case NOTE_INFO_THREAD:
7382 /* Make a ".reg/999" section. */
7383 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7385 len = strlen (buf) + 1;
7386 name = bfd_alloc (abfd, len);
7390 memcpy (name, buf, len);
7392 sect = bfd_make_section_anyway (abfd, name);
7396 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7397 sect->filepos = (note->descpos
7398 + offsetof (struct win32_pstatus,
7399 data.thread_info.thread_context));
7400 sect->flags = SEC_HAS_CONTENTS;
7401 sect->alignment_power = 2;
7403 if (pstatus.data.thread_info.is_active_thread)
7404 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7408 case NOTE_INFO_MODULE:
7409 /* Make a ".module/xxxxxxxx" section. */
7410 sprintf (buf, ".module/%08lx",
7411 (long) pstatus.data.module_info.base_address);
7413 len = strlen (buf) + 1;
7414 name = bfd_alloc (abfd, len);
7418 memcpy (name, buf, len);
7420 sect = bfd_make_section_anyway (abfd, name);
7425 sect->size = note->descsz;
7426 sect->filepos = note->descpos;
7427 sect->flags = SEC_HAS_CONTENTS;
7428 sect->alignment_power = 2;
7437 #endif /* HAVE_WIN32_PSTATUS_T */
7440 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7442 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7450 if (bed->elf_backend_grok_prstatus)
7451 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7453 #if defined (HAVE_PRSTATUS_T)
7454 return elfcore_grok_prstatus (abfd, note);
7459 #if defined (HAVE_PSTATUS_T)
7461 return elfcore_grok_pstatus (abfd, note);
7464 #if defined (HAVE_LWPSTATUS_T)
7466 return elfcore_grok_lwpstatus (abfd, note);
7469 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7470 return elfcore_grok_prfpreg (abfd, note);
7472 #if defined (HAVE_WIN32_PSTATUS_T)
7473 case NT_WIN32PSTATUS:
7474 return elfcore_grok_win32pstatus (abfd, note);
7477 case NT_PRXFPREG: /* Linux SSE extension */
7478 if (note->namesz == 6
7479 && strcmp (note->namedata, "LINUX") == 0)
7480 return elfcore_grok_prxfpreg (abfd, note);
7486 if (bed->elf_backend_grok_psinfo)
7487 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7489 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7490 return elfcore_grok_psinfo (abfd, note);
7497 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7501 sect->size = note->descsz;
7502 sect->filepos = note->descpos;
7503 sect->flags = SEC_HAS_CONTENTS;
7504 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7512 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7516 cp = strchr (note->namedata, '@');
7519 *lwpidp = atoi(cp + 1);
7526 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7529 /* Signal number at offset 0x08. */
7530 elf_tdata (abfd)->core_signal
7531 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7533 /* Process ID at offset 0x50. */
7534 elf_tdata (abfd)->core_pid
7535 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7537 /* Command name at 0x7c (max 32 bytes, including nul). */
7538 elf_tdata (abfd)->core_command
7539 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7541 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7546 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7550 if (elfcore_netbsd_get_lwpid (note, &lwp))
7551 elf_tdata (abfd)->core_lwpid = lwp;
7553 if (note->type == NT_NETBSDCORE_PROCINFO)
7555 /* NetBSD-specific core "procinfo". Note that we expect to
7556 find this note before any of the others, which is fine,
7557 since the kernel writes this note out first when it
7558 creates a core file. */
7560 return elfcore_grok_netbsd_procinfo (abfd, note);
7563 /* As of Jan 2002 there are no other machine-independent notes
7564 defined for NetBSD core files. If the note type is less
7565 than the start of the machine-dependent note types, we don't
7568 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7572 switch (bfd_get_arch (abfd))
7574 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7575 PT_GETFPREGS == mach+2. */
7577 case bfd_arch_alpha:
7578 case bfd_arch_sparc:
7581 case NT_NETBSDCORE_FIRSTMACH+0:
7582 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7584 case NT_NETBSDCORE_FIRSTMACH+2:
7585 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7591 /* On all other arch's, PT_GETREGS == mach+1 and
7592 PT_GETFPREGS == mach+3. */
7597 case NT_NETBSDCORE_FIRSTMACH+1:
7598 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7600 case NT_NETBSDCORE_FIRSTMACH+3:
7601 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7611 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7613 void *ddata = note->descdata;
7620 /* nto_procfs_status 'pid' field is at offset 0. */
7621 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7623 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7624 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7626 /* nto_procfs_status 'flags' field is at offset 8. */
7627 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7629 /* nto_procfs_status 'what' field is at offset 14. */
7630 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7632 elf_tdata (abfd)->core_signal = sig;
7633 elf_tdata (abfd)->core_lwpid = *tid;
7636 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7637 do not come from signals so we make sure we set the current
7638 thread just in case. */
7639 if (flags & 0x00000080)
7640 elf_tdata (abfd)->core_lwpid = *tid;
7642 /* Make a ".qnx_core_status/%d" section. */
7643 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7645 name = bfd_alloc (abfd, strlen (buf) + 1);
7650 sect = bfd_make_section_anyway (abfd, name);
7654 sect->size = note->descsz;
7655 sect->filepos = note->descpos;
7656 sect->flags = SEC_HAS_CONTENTS;
7657 sect->alignment_power = 2;
7659 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7663 elfcore_grok_nto_regs (bfd *abfd,
7664 Elf_Internal_Note *note,
7672 /* Make a "(base)/%d" section. */
7673 sprintf (buf, "%s/%ld", base, (long) tid);
7675 name = bfd_alloc (abfd, strlen (buf) + 1);
7680 sect = bfd_make_section_anyway (abfd, name);
7684 sect->size = note->descsz;
7685 sect->filepos = note->descpos;
7686 sect->flags = SEC_HAS_CONTENTS;
7687 sect->alignment_power = 2;
7689 /* This is the current thread. */
7690 if (elf_tdata (abfd)->core_lwpid == tid)
7691 return elfcore_maybe_make_sect (abfd, base, sect);
7696 #define BFD_QNT_CORE_INFO 7
7697 #define BFD_QNT_CORE_STATUS 8
7698 #define BFD_QNT_CORE_GREG 9
7699 #define BFD_QNT_CORE_FPREG 10
7702 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7704 /* Every GREG section has a STATUS section before it. Store the
7705 tid from the previous call to pass down to the next gregs
7707 static pid_t tid = 1;
7711 case BFD_QNT_CORE_INFO:
7712 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7713 case BFD_QNT_CORE_STATUS:
7714 return elfcore_grok_nto_status (abfd, note, &tid);
7715 case BFD_QNT_CORE_GREG:
7716 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7717 case BFD_QNT_CORE_FPREG:
7718 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7724 /* Function: elfcore_write_note
7731 size of data for note
7734 End of buffer containing note. */
7737 elfcore_write_note (bfd *abfd,
7745 Elf_External_Note *xnp;
7755 const struct elf_backend_data *bed;
7757 namesz = strlen (name) + 1;
7758 bed = get_elf_backend_data (abfd);
7759 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7762 newspace = 12 + namesz + pad + size;
7764 p = realloc (buf, *bufsiz + newspace);
7766 *bufsiz += newspace;
7767 xnp = (Elf_External_Note *) dest;
7768 H_PUT_32 (abfd, namesz, xnp->namesz);
7769 H_PUT_32 (abfd, size, xnp->descsz);
7770 H_PUT_32 (abfd, type, xnp->type);
7774 memcpy (dest, name, namesz);
7782 memcpy (dest, input, size);
7786 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7788 elfcore_write_prpsinfo (bfd *abfd,
7795 char *note_name = "CORE";
7797 #if defined (HAVE_PSINFO_T)
7799 note_type = NT_PSINFO;
7802 note_type = NT_PRPSINFO;
7805 memset (&data, 0, sizeof (data));
7806 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7807 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7808 return elfcore_write_note (abfd, buf, bufsiz,
7809 note_name, note_type, &data, sizeof (data));
7811 #endif /* PSINFO_T or PRPSINFO_T */
7813 #if defined (HAVE_PRSTATUS_T)
7815 elfcore_write_prstatus (bfd *abfd,
7823 char *note_name = "CORE";
7825 memset (&prstat, 0, sizeof (prstat));
7826 prstat.pr_pid = pid;
7827 prstat.pr_cursig = cursig;
7828 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7829 return elfcore_write_note (abfd, buf, bufsiz,
7830 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7832 #endif /* HAVE_PRSTATUS_T */
7834 #if defined (HAVE_LWPSTATUS_T)
7836 elfcore_write_lwpstatus (bfd *abfd,
7843 lwpstatus_t lwpstat;
7844 char *note_name = "CORE";
7846 memset (&lwpstat, 0, sizeof (lwpstat));
7847 lwpstat.pr_lwpid = pid >> 16;
7848 lwpstat.pr_cursig = cursig;
7849 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7850 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7851 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7853 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7854 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7856 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7857 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7860 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7861 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7863 #endif /* HAVE_LWPSTATUS_T */
7865 #if defined (HAVE_PSTATUS_T)
7867 elfcore_write_pstatus (bfd *abfd,
7875 char *note_name = "CORE";
7877 memset (&pstat, 0, sizeof (pstat));
7878 pstat.pr_pid = pid & 0xffff;
7879 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7880 NT_PSTATUS, &pstat, sizeof (pstat));
7883 #endif /* HAVE_PSTATUS_T */
7886 elfcore_write_prfpreg (bfd *abfd,
7892 char *note_name = "CORE";
7893 return elfcore_write_note (abfd, buf, bufsiz,
7894 note_name, NT_FPREGSET, fpregs, size);
7898 elfcore_write_prxfpreg (bfd *abfd,
7901 const void *xfpregs,
7904 char *note_name = "LINUX";
7905 return elfcore_write_note (abfd, buf, bufsiz,
7906 note_name, NT_PRXFPREG, xfpregs, size);
7910 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7918 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7921 buf = bfd_malloc (size);
7925 if (bfd_bread (buf, size, abfd) != size)
7933 while (p < buf + size)
7935 /* FIXME: bad alignment assumption. */
7936 Elf_External_Note *xnp = (Elf_External_Note *) p;
7937 Elf_Internal_Note in;
7939 in.type = H_GET_32 (abfd, xnp->type);
7941 in.namesz = H_GET_32 (abfd, xnp->namesz);
7942 in.namedata = xnp->name;
7944 in.descsz = H_GET_32 (abfd, xnp->descsz);
7945 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7946 in.descpos = offset + (in.descdata - buf);
7948 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7950 if (! elfcore_grok_netbsd_note (abfd, &in))
7953 else if (strncmp (in.namedata, "QNX", 3) == 0)
7955 if (! elfcore_grok_nto_note (abfd, &in))
7960 if (! elfcore_grok_note (abfd, &in))
7964 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7971 /* Providing external access to the ELF program header table. */
7973 /* Return an upper bound on the number of bytes required to store a
7974 copy of ABFD's program header table entries. Return -1 if an error
7975 occurs; bfd_get_error will return an appropriate code. */
7978 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7980 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7982 bfd_set_error (bfd_error_wrong_format);
7986 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7989 /* Copy ABFD's program header table entries to *PHDRS. The entries
7990 will be stored as an array of Elf_Internal_Phdr structures, as
7991 defined in include/elf/internal.h. To find out how large the
7992 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7994 Return the number of program header table entries read, or -1 if an
7995 error occurs; bfd_get_error will return an appropriate code. */
7998 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8002 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8004 bfd_set_error (bfd_error_wrong_format);
8008 num_phdrs = elf_elfheader (abfd)->e_phnum;
8009 memcpy (phdrs, elf_tdata (abfd)->phdr,
8010 num_phdrs * sizeof (Elf_Internal_Phdr));
8016 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8019 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8021 i_ehdrp = elf_elfheader (abfd);
8022 if (i_ehdrp == NULL)
8023 sprintf_vma (buf, value);
8026 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8028 #if BFD_HOST_64BIT_LONG
8029 sprintf (buf, "%016lx", value);
8031 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8032 _bfd_int64_low (value));
8036 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8039 sprintf_vma (buf, value);
8044 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8047 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8049 i_ehdrp = elf_elfheader (abfd);
8050 if (i_ehdrp == NULL)
8051 fprintf_vma ((FILE *) stream, value);
8054 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8056 #if BFD_HOST_64BIT_LONG
8057 fprintf ((FILE *) stream, "%016lx", value);
8059 fprintf ((FILE *) stream, "%08lx%08lx",
8060 _bfd_int64_high (value), _bfd_int64_low (value));
8064 fprintf ((FILE *) stream, "%08lx",
8065 (unsigned long) (value & 0xffffffff));
8068 fprintf_vma ((FILE *) stream, value);
8072 enum elf_reloc_type_class
8073 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8075 return reloc_class_normal;
8078 /* For RELA architectures, return the relocation value for a
8079 relocation against a local symbol. */
8082 _bfd_elf_rela_local_sym (bfd *abfd,
8083 Elf_Internal_Sym *sym,
8085 Elf_Internal_Rela *rel)
8087 asection *sec = *psec;
8090 relocation = (sec->output_section->vma
8091 + sec->output_offset
8093 if ((sec->flags & SEC_MERGE)
8094 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8095 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8098 _bfd_merged_section_offset (abfd, psec,
8099 elf_section_data (sec)->sec_info,
8100 sym->st_value + rel->r_addend);
8103 /* If we have changed the section, and our original section is
8104 marked with SEC_EXCLUDE, it means that the original
8105 SEC_MERGE section has been completely subsumed in some
8106 other SEC_MERGE section. In this case, we need to leave
8107 some info around for --emit-relocs. */
8108 if ((sec->flags & SEC_EXCLUDE) != 0)
8109 sec->kept_section = *psec;
8112 rel->r_addend -= relocation;
8113 rel->r_addend += sec->output_section->vma + sec->output_offset;
8119 _bfd_elf_rel_local_sym (bfd *abfd,
8120 Elf_Internal_Sym *sym,
8124 asection *sec = *psec;
8126 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8127 return sym->st_value + addend;
8129 return _bfd_merged_section_offset (abfd, psec,
8130 elf_section_data (sec)->sec_info,
8131 sym->st_value + addend);
8135 _bfd_elf_section_offset (bfd *abfd,
8136 struct bfd_link_info *info,
8140 switch (sec->sec_info_type)
8142 case ELF_INFO_TYPE_STABS:
8143 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8145 case ELF_INFO_TYPE_EH_FRAME:
8146 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8152 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8153 reconstruct an ELF file by reading the segments out of remote memory
8154 based on the ELF file header at EHDR_VMA and the ELF program headers it
8155 points to. If not null, *LOADBASEP is filled in with the difference
8156 between the VMAs from which the segments were read, and the VMAs the
8157 file headers (and hence BFD's idea of each section's VMA) put them at.
8159 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8160 remote memory at target address VMA into the local buffer at MYADDR; it
8161 should return zero on success or an `errno' code on failure. TEMPL must
8162 be a BFD for an ELF target with the word size and byte order found in
8163 the remote memory. */
8166 bfd_elf_bfd_from_remote_memory
8170 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8172 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8173 (templ, ehdr_vma, loadbasep, target_read_memory);
8177 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8178 long symcount ATTRIBUTE_UNUSED,
8179 asymbol **syms ATTRIBUTE_UNUSED,
8184 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8187 const char *relplt_name;
8188 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8192 Elf_Internal_Shdr *hdr;
8198 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8201 if (dynsymcount <= 0)
8204 if (!bed->plt_sym_val)
8207 relplt_name = bed->relplt_name;
8208 if (relplt_name == NULL)
8209 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8210 relplt = bfd_get_section_by_name (abfd, relplt_name);
8214 hdr = &elf_section_data (relplt)->this_hdr;
8215 if (hdr->sh_link != elf_dynsymtab (abfd)
8216 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8219 plt = bfd_get_section_by_name (abfd, ".plt");
8223 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8224 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8227 count = relplt->size / hdr->sh_entsize;
8228 size = count * sizeof (asymbol);
8229 p = relplt->relocation;
8230 for (i = 0; i < count; i++, s++, p++)
8231 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8233 s = *ret = bfd_malloc (size);
8237 names = (char *) (s + count);
8238 p = relplt->relocation;
8240 for (i = 0; i < count; i++, s++, p++)
8245 addr = bed->plt_sym_val (i, plt, p);
8246 if (addr == (bfd_vma) -1)
8249 *s = **p->sym_ptr_ptr;
8250 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8251 we are defining a symbol, ensure one of them is set. */
8252 if ((s->flags & BSF_LOCAL) == 0)
8253 s->flags |= BSF_GLOBAL;
8255 s->value = addr - plt->vma;
8257 len = strlen ((*p->sym_ptr_ptr)->name);
8258 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8260 memcpy (names, "@plt", sizeof ("@plt"));
8261 names += sizeof ("@plt");
8268 /* Sort symbol by binding and section. We want to put definitions
8269 sorted by section at the beginning. */
8272 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8274 const Elf_Internal_Sym *s1;
8275 const Elf_Internal_Sym *s2;
8278 /* Make sure that undefined symbols are at the end. */
8279 s1 = (const Elf_Internal_Sym *) arg1;
8280 if (s1->st_shndx == SHN_UNDEF)
8282 s2 = (const Elf_Internal_Sym *) arg2;
8283 if (s2->st_shndx == SHN_UNDEF)
8286 /* Sorted by section index. */
8287 shndx = s1->st_shndx - s2->st_shndx;
8291 /* Sorted by binding. */
8292 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8297 Elf_Internal_Sym *sym;
8302 elf_sym_name_compare (const void *arg1, const void *arg2)
8304 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8305 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8306 return strcmp (s1->name, s2->name);
8309 /* Check if 2 sections define the same set of local and global
8313 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8316 const struct elf_backend_data *bed1, *bed2;
8317 Elf_Internal_Shdr *hdr1, *hdr2;
8318 bfd_size_type symcount1, symcount2;
8319 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8320 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8321 Elf_Internal_Sym *isymend;
8322 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8323 bfd_size_type count1, count2, i;
8330 /* If both are .gnu.linkonce sections, they have to have the same
8332 if (strncmp (sec1->name, ".gnu.linkonce",
8333 sizeof ".gnu.linkonce" - 1) == 0
8334 && strncmp (sec2->name, ".gnu.linkonce",
8335 sizeof ".gnu.linkonce" - 1) == 0)
8336 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8337 sec2->name + sizeof ".gnu.linkonce") == 0;
8339 /* Both sections have to be in ELF. */
8340 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8341 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8344 if (elf_section_type (sec1) != elf_section_type (sec2))
8347 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8348 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8350 /* If both are members of section groups, they have to have the
8352 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8356 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8357 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8358 if (shndx1 == -1 || shndx2 == -1)
8361 bed1 = get_elf_backend_data (bfd1);
8362 bed2 = get_elf_backend_data (bfd2);
8363 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8364 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8365 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8366 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8368 if (symcount1 == 0 || symcount2 == 0)
8371 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8373 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8377 if (isymbuf1 == NULL || isymbuf2 == NULL)
8380 /* Sort symbols by binding and section. Global definitions are at
8382 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8383 elf_sort_elf_symbol);
8384 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8385 elf_sort_elf_symbol);
8387 /* Count definitions in the section. */
8389 for (isym = isymbuf1, isymend = isym + symcount1;
8390 isym < isymend; isym++)
8392 if (isym->st_shndx == (unsigned int) shndx1)
8399 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8404 for (isym = isymbuf2, isymend = isym + symcount2;
8405 isym < isymend; isym++)
8407 if (isym->st_shndx == (unsigned int) shndx2)
8414 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8418 if (count1 == 0 || count2 == 0 || count1 != count2)
8421 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8422 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8424 if (symtable1 == NULL || symtable2 == NULL)
8428 for (isym = isymstart1, isymend = isym + count1;
8429 isym < isymend; isym++)
8432 symp->name = bfd_elf_string_from_elf_section (bfd1,
8439 for (isym = isymstart2, isymend = isym + count1;
8440 isym < isymend; isym++)
8443 symp->name = bfd_elf_string_from_elf_section (bfd2,
8449 /* Sort symbol by name. */
8450 qsort (symtable1, count1, sizeof (struct elf_symbol),
8451 elf_sym_name_compare);
8452 qsort (symtable2, count1, sizeof (struct elf_symbol),
8453 elf_sym_name_compare);
8455 for (i = 0; i < count1; i++)
8456 /* Two symbols must have the same binding, type and name. */
8457 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8458 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8459 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
8477 /* It is only used by x86-64 so far. */
8478 asection _bfd_elf_large_com_section
8479 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8480 SEC_IS_COMMON, NULL, NULL, "LARGE_COMMON",
8483 /* Return TRUE if 2 section types are compatible. */
8486 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
8487 bfd *bbfd, const asection *bsec)
8491 || abfd->xvec->flavour != bfd_target_elf_flavour
8492 || bbfd->xvec->flavour != bfd_target_elf_flavour)
8495 return elf_section_type (asec) == elf_section_type (bsec);