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)
2674 /* We also need to mark SHF_GROUP here for relocatable
2676 struct bfd_link_order *l;
2679 for (l = asect->map_head.link_order; l != NULL; l = l->next)
2680 if (l->type == bfd_indirect_link_order
2681 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2684 /* The name is not important. Anything will do. */
2685 elf_group_name (elt->output_section) = "G";
2686 elf_section_flags (elt->output_section) |= SHF_GROUP;
2688 elt = elf_next_in_group (elt);
2689 /* During a relocatable link, the lists are
2692 while (elt != elf_next_in_group (l->u.indirect.section));
2694 this_hdr->sh_type = SHT_GROUP;
2696 else if ((asect->flags & SEC_ALLOC) != 0
2697 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2698 || (asect->flags & SEC_NEVER_LOAD) != 0))
2699 this_hdr->sh_type = SHT_NOBITS;
2701 this_hdr->sh_type = SHT_PROGBITS;
2704 switch (this_hdr->sh_type)
2710 case SHT_INIT_ARRAY:
2711 case SHT_FINI_ARRAY:
2712 case SHT_PREINIT_ARRAY:
2719 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2723 this_hdr->sh_entsize = bed->s->sizeof_sym;
2727 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2731 if (get_elf_backend_data (abfd)->may_use_rela_p)
2732 this_hdr->sh_entsize = bed->s->sizeof_rela;
2736 if (get_elf_backend_data (abfd)->may_use_rel_p)
2737 this_hdr->sh_entsize = bed->s->sizeof_rel;
2740 case SHT_GNU_versym:
2741 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2744 case SHT_GNU_verdef:
2745 this_hdr->sh_entsize = 0;
2746 /* objcopy or strip will copy over sh_info, but may not set
2747 cverdefs. The linker will set cverdefs, but sh_info will be
2749 if (this_hdr->sh_info == 0)
2750 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2752 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2753 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2756 case SHT_GNU_verneed:
2757 this_hdr->sh_entsize = 0;
2758 /* objcopy or strip will copy over sh_info, but may not set
2759 cverrefs. The linker will set cverrefs, but sh_info will be
2761 if (this_hdr->sh_info == 0)
2762 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2764 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2765 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2769 this_hdr->sh_entsize = 4;
2773 if ((asect->flags & SEC_ALLOC) != 0)
2774 this_hdr->sh_flags |= SHF_ALLOC;
2775 if ((asect->flags & SEC_READONLY) == 0)
2776 this_hdr->sh_flags |= SHF_WRITE;
2777 if ((asect->flags & SEC_CODE) != 0)
2778 this_hdr->sh_flags |= SHF_EXECINSTR;
2779 if ((asect->flags & SEC_MERGE) != 0)
2781 this_hdr->sh_flags |= SHF_MERGE;
2782 this_hdr->sh_entsize = asect->entsize;
2783 if ((asect->flags & SEC_STRINGS) != 0)
2784 this_hdr->sh_flags |= SHF_STRINGS;
2786 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2787 this_hdr->sh_flags |= SHF_GROUP;
2788 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2790 this_hdr->sh_flags |= SHF_TLS;
2791 if (asect->size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2793 struct bfd_link_order *o;
2795 this_hdr->sh_size = 0;
2796 for (o = asect->map_head.link_order; o != NULL; o = o->next)
2797 if (this_hdr->sh_size < o->offset + o->size)
2798 this_hdr->sh_size = o->offset + o->size;
2799 if (this_hdr->sh_size)
2800 this_hdr->sh_type = SHT_NOBITS;
2804 /* Check for processor-specific section types. */
2805 if (bed->elf_backend_fake_sections
2806 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2809 /* If the section has relocs, set up a section header for the
2810 SHT_REL[A] section. If two relocation sections are required for
2811 this section, it is up to the processor-specific back-end to
2812 create the other. */
2813 if ((asect->flags & SEC_RELOC) != 0
2814 && !_bfd_elf_init_reloc_shdr (abfd,
2815 &elf_section_data (asect)->rel_hdr,
2821 /* Fill in the contents of a SHT_GROUP section. */
2824 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2826 bfd_boolean *failedptr = failedptrarg;
2827 unsigned long symindx;
2828 asection *elt, *first;
2830 struct bfd_link_order *l;
2833 /* Ignore linker created group section. See elfNN_ia64_object_p in
2835 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2840 if (elf_group_id (sec) != NULL)
2841 symindx = elf_group_id (sec)->udata.i;
2845 /* If called from the assembler, swap_out_syms will have set up
2846 elf_section_syms; If called for "ld -r", use target_index. */
2847 if (elf_section_syms (abfd) != NULL)
2848 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2850 symindx = sec->target_index;
2852 elf_section_data (sec)->this_hdr.sh_info = symindx;
2854 /* The contents won't be allocated for "ld -r" or objcopy. */
2856 if (sec->contents == NULL)
2859 sec->contents = bfd_alloc (abfd, sec->size);
2861 /* Arrange for the section to be written out. */
2862 elf_section_data (sec)->this_hdr.contents = sec->contents;
2863 if (sec->contents == NULL)
2870 loc = sec->contents + sec->size;
2872 /* Get the pointer to the first section in the group that gas
2873 squirreled away here. objcopy arranges for this to be set to the
2874 start of the input section group. */
2875 first = elt = elf_next_in_group (sec);
2877 /* First element is a flag word. Rest of section is elf section
2878 indices for all the sections of the group. Write them backwards
2879 just to keep the group in the same order as given in .section
2880 directives, not that it matters. */
2889 s = s->output_section;
2892 idx = elf_section_data (s)->this_idx;
2893 H_PUT_32 (abfd, idx, loc);
2894 elt = elf_next_in_group (elt);
2899 /* If this is a relocatable link, then the above did nothing because
2900 SEC is the output section. Look through the input sections
2902 for (l = sec->map_head.link_order; l != NULL; l = l->next)
2903 if (l->type == bfd_indirect_link_order
2904 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2909 elf_section_data (elt->output_section)->this_idx, loc);
2910 elt = elf_next_in_group (elt);
2911 /* During a relocatable link, the lists are circular. */
2913 while (elt != elf_next_in_group (l->u.indirect.section));
2915 if ((loc -= 4) != sec->contents)
2918 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2921 /* Assign all ELF section numbers. The dummy first section is handled here
2922 too. The link/info pointers for the standard section types are filled
2923 in here too, while we're at it. */
2926 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2928 struct elf_obj_tdata *t = elf_tdata (abfd);
2930 unsigned int section_number, secn;
2931 Elf_Internal_Shdr **i_shdrp;
2932 struct bfd_elf_section_data *d;
2936 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2938 /* SHT_GROUP sections are in relocatable files only. */
2939 if (link_info == NULL || link_info->relocatable)
2941 /* Put SHT_GROUP sections first. */
2942 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2944 d = elf_section_data (sec);
2946 if (d->this_hdr.sh_type == SHT_GROUP)
2948 if (sec->flags & SEC_LINKER_CREATED)
2950 /* Remove the linker created SHT_GROUP sections. */
2951 bfd_section_list_remove (abfd, sec);
2952 abfd->section_count--;
2956 if (section_number == SHN_LORESERVE)
2957 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2958 d->this_idx = section_number++;
2964 for (sec = abfd->sections; sec; sec = sec->next)
2966 d = elf_section_data (sec);
2968 if (d->this_hdr.sh_type != SHT_GROUP)
2970 if (section_number == SHN_LORESERVE)
2971 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2972 d->this_idx = section_number++;
2974 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2975 if ((sec->flags & SEC_RELOC) == 0)
2979 if (section_number == SHN_LORESERVE)
2980 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2981 d->rel_idx = section_number++;
2982 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2987 if (section_number == SHN_LORESERVE)
2988 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2989 d->rel_idx2 = section_number++;
2990 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2996 if (section_number == SHN_LORESERVE)
2997 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2998 t->shstrtab_section = section_number++;
2999 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
3000 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
3002 if (bfd_get_symcount (abfd) > 0)
3004 if (section_number == SHN_LORESERVE)
3005 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3006 t->symtab_section = section_number++;
3007 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3008 if (section_number > SHN_LORESERVE - 2)
3010 if (section_number == SHN_LORESERVE)
3011 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3012 t->symtab_shndx_section = section_number++;
3013 t->symtab_shndx_hdr.sh_name
3014 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3015 ".symtab_shndx", FALSE);
3016 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3019 if (section_number == SHN_LORESERVE)
3020 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
3021 t->strtab_section = section_number++;
3022 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3025 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3026 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3028 elf_numsections (abfd) = section_number;
3029 elf_elfheader (abfd)->e_shnum = section_number;
3030 if (section_number > SHN_LORESERVE)
3031 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
3033 /* Set up the list of section header pointers, in agreement with the
3035 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
3036 if (i_shdrp == NULL)
3039 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3040 if (i_shdrp[0] == NULL)
3042 bfd_release (abfd, i_shdrp);
3046 elf_elfsections (abfd) = i_shdrp;
3048 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3049 if (bfd_get_symcount (abfd) > 0)
3051 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3052 if (elf_numsections (abfd) > SHN_LORESERVE)
3054 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3055 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3057 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3058 t->symtab_hdr.sh_link = t->strtab_section;
3061 for (sec = abfd->sections; sec; sec = sec->next)
3063 struct bfd_elf_section_data *d = elf_section_data (sec);
3067 i_shdrp[d->this_idx] = &d->this_hdr;
3068 if (d->rel_idx != 0)
3069 i_shdrp[d->rel_idx] = &d->rel_hdr;
3070 if (d->rel_idx2 != 0)
3071 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3073 /* Fill in the sh_link and sh_info fields while we're at it. */
3075 /* sh_link of a reloc section is the section index of the symbol
3076 table. sh_info is the section index of the section to which
3077 the relocation entries apply. */
3078 if (d->rel_idx != 0)
3080 d->rel_hdr.sh_link = t->symtab_section;
3081 d->rel_hdr.sh_info = d->this_idx;
3083 if (d->rel_idx2 != 0)
3085 d->rel_hdr2->sh_link = t->symtab_section;
3086 d->rel_hdr2->sh_info = d->this_idx;
3089 /* We need to set up sh_link for SHF_LINK_ORDER. */
3090 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3092 s = elf_linked_to_section (sec);
3094 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3097 struct bfd_link_order *p;
3099 /* Find out what the corresponding section in output
3101 for (p = sec->map_head.link_order; p != NULL; p = p->next)
3103 s = p->u.indirect.section;
3104 if (p->type == bfd_indirect_link_order
3105 && (bfd_get_flavour (s->owner)
3106 == bfd_target_elf_flavour))
3108 Elf_Internal_Shdr ** const elf_shdrp
3109 = elf_elfsections (s->owner);
3111 = _bfd_elf_section_from_bfd_section (s->owner, s);
3112 elfsec = elf_shdrp[elfsec]->sh_link;
3114 The Intel C compiler generates SHT_IA_64_UNWIND with
3115 SHF_LINK_ORDER. But it doesn't set the sh_link or
3116 sh_info fields. Hence we could get the situation
3117 where elfsec is 0. */
3120 const struct elf_backend_data *bed
3121 = get_elf_backend_data (abfd);
3122 if (bed->link_order_error_handler)
3123 bed->link_order_error_handler
3124 (_("%B: warning: sh_link not set for section `%A'"),
3129 s = elf_shdrp[elfsec]->bfd_section;
3130 if (elf_discarded_section (s))
3133 (*_bfd_error_handler)
3134 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3135 abfd, d->this_hdr.bfd_section,
3137 /* Point to the kept section if it has
3138 the same size as the discarded
3140 kept = _bfd_elf_check_kept_section (s);
3143 bfd_set_error (bfd_error_bad_value);
3148 s = s->output_section;
3149 BFD_ASSERT (s != NULL);
3150 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3158 switch (d->this_hdr.sh_type)
3162 /* A reloc section which we are treating as a normal BFD
3163 section. sh_link is the section index of the symbol
3164 table. sh_info is the section index of the section to
3165 which the relocation entries apply. We assume that an
3166 allocated reloc section uses the dynamic symbol table.
3167 FIXME: How can we be sure? */
3168 s = bfd_get_section_by_name (abfd, ".dynsym");
3170 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3172 /* We look up the section the relocs apply to by name. */
3174 if (d->this_hdr.sh_type == SHT_REL)
3178 s = bfd_get_section_by_name (abfd, name);
3180 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3184 /* We assume that a section named .stab*str is a stabs
3185 string section. We look for a section with the same name
3186 but without the trailing ``str'', and set its sh_link
3187 field to point to this section. */
3188 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3189 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3194 len = strlen (sec->name);
3195 alc = bfd_malloc (len - 2);
3198 memcpy (alc, sec->name, len - 3);
3199 alc[len - 3] = '\0';
3200 s = bfd_get_section_by_name (abfd, alc);
3204 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3206 /* This is a .stab section. */
3207 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3208 elf_section_data (s)->this_hdr.sh_entsize
3209 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3216 case SHT_GNU_verneed:
3217 case SHT_GNU_verdef:
3218 /* sh_link is the section header index of the string table
3219 used for the dynamic entries, or the symbol table, or the
3221 s = bfd_get_section_by_name (abfd, ".dynstr");
3223 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3226 case SHT_GNU_LIBLIST:
3227 /* sh_link is the section header index of the prelink library
3229 used for the dynamic entries, or the symbol table, or the
3231 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3232 ? ".dynstr" : ".gnu.libstr");
3234 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3238 case SHT_GNU_versym:
3239 /* sh_link is the section header index of the symbol table
3240 this hash table or version table is for. */
3241 s = bfd_get_section_by_name (abfd, ".dynsym");
3243 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3247 d->this_hdr.sh_link = t->symtab_section;
3251 for (secn = 1; secn < section_number; ++secn)
3252 if (i_shdrp[secn] == NULL)
3253 i_shdrp[secn] = i_shdrp[0];
3255 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3256 i_shdrp[secn]->sh_name);
3260 /* Map symbol from it's internal number to the external number, moving
3261 all local symbols to be at the head of the list. */
3264 sym_is_global (bfd *abfd, asymbol *sym)
3266 /* If the backend has a special mapping, use it. */
3267 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3268 if (bed->elf_backend_sym_is_global)
3269 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3271 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3272 || bfd_is_und_section (bfd_get_section (sym))
3273 || bfd_is_com_section (bfd_get_section (sym)));
3277 elf_map_symbols (bfd *abfd)
3279 unsigned int symcount = bfd_get_symcount (abfd);
3280 asymbol **syms = bfd_get_outsymbols (abfd);
3281 asymbol **sect_syms;
3282 unsigned int num_locals = 0;
3283 unsigned int num_globals = 0;
3284 unsigned int num_locals2 = 0;
3285 unsigned int num_globals2 = 0;
3292 fprintf (stderr, "elf_map_symbols\n");
3296 for (asect = abfd->sections; asect; asect = asect->next)
3298 if (max_index < asect->index)
3299 max_index = asect->index;
3303 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3304 if (sect_syms == NULL)
3306 elf_section_syms (abfd) = sect_syms;
3307 elf_num_section_syms (abfd) = max_index;
3309 /* Init sect_syms entries for any section symbols we have already
3310 decided to output. */
3311 for (idx = 0; idx < symcount; idx++)
3313 asymbol *sym = syms[idx];
3315 if ((sym->flags & BSF_SECTION_SYM) != 0
3322 if (sec->owner != NULL)
3324 if (sec->owner != abfd)
3326 if (sec->output_offset != 0)
3329 sec = sec->output_section;
3331 /* Empty sections in the input files may have had a
3332 section symbol created for them. (See the comment
3333 near the end of _bfd_generic_link_output_symbols in
3334 linker.c). If the linker script discards such
3335 sections then we will reach this point. Since we know
3336 that we cannot avoid this case, we detect it and skip
3337 the abort and the assignment to the sect_syms array.
3338 To reproduce this particular case try running the
3339 linker testsuite test ld-scripts/weak.exp for an ELF
3340 port that uses the generic linker. */
3341 if (sec->owner == NULL)
3344 BFD_ASSERT (sec->owner == abfd);
3346 sect_syms[sec->index] = syms[idx];
3351 /* Classify all of the symbols. */
3352 for (idx = 0; idx < symcount; idx++)
3354 if (!sym_is_global (abfd, syms[idx]))
3360 /* We will be adding a section symbol for each BFD section. Most normal
3361 sections will already have a section symbol in outsymbols, but
3362 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3363 at least in that case. */
3364 for (asect = abfd->sections; asect; asect = asect->next)
3366 if (sect_syms[asect->index] == NULL)
3368 if (!sym_is_global (abfd, asect->symbol))
3375 /* Now sort the symbols so the local symbols are first. */
3376 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3378 if (new_syms == NULL)
3381 for (idx = 0; idx < symcount; idx++)
3383 asymbol *sym = syms[idx];
3386 if (!sym_is_global (abfd, sym))
3389 i = num_locals + num_globals2++;
3391 sym->udata.i = i + 1;
3393 for (asect = abfd->sections; asect; asect = asect->next)
3395 if (sect_syms[asect->index] == NULL)
3397 asymbol *sym = asect->symbol;
3400 sect_syms[asect->index] = sym;
3401 if (!sym_is_global (abfd, sym))
3404 i = num_locals + num_globals2++;
3406 sym->udata.i = i + 1;
3410 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3412 elf_num_locals (abfd) = num_locals;
3413 elf_num_globals (abfd) = num_globals;
3417 /* Align to the maximum file alignment that could be required for any
3418 ELF data structure. */
3420 static inline file_ptr
3421 align_file_position (file_ptr off, int align)
3423 return (off + align - 1) & ~(align - 1);
3426 /* Assign a file position to a section, optionally aligning to the
3427 required section alignment. */
3430 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3438 al = i_shdrp->sh_addralign;
3440 offset = BFD_ALIGN (offset, al);
3442 i_shdrp->sh_offset = offset;
3443 if (i_shdrp->bfd_section != NULL)
3444 i_shdrp->bfd_section->filepos = offset;
3445 if (i_shdrp->sh_type != SHT_NOBITS)
3446 offset += i_shdrp->sh_size;
3450 /* Compute the file positions we are going to put the sections at, and
3451 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3452 is not NULL, this is being called by the ELF backend linker. */
3455 _bfd_elf_compute_section_file_positions (bfd *abfd,
3456 struct bfd_link_info *link_info)
3458 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3460 struct bfd_strtab_hash *strtab = NULL;
3461 Elf_Internal_Shdr *shstrtab_hdr;
3463 if (abfd->output_has_begun)
3466 /* Do any elf backend specific processing first. */
3467 if (bed->elf_backend_begin_write_processing)
3468 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3470 if (! prep_headers (abfd))
3473 /* Post process the headers if necessary. */
3474 if (bed->elf_backend_post_process_headers)
3475 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3478 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3482 if (!assign_section_numbers (abfd, link_info))
3485 /* The backend linker builds symbol table information itself. */
3486 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3488 /* Non-zero if doing a relocatable link. */
3489 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3491 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3495 if (link_info == NULL)
3497 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3502 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3503 /* sh_name was set in prep_headers. */
3504 shstrtab_hdr->sh_type = SHT_STRTAB;
3505 shstrtab_hdr->sh_flags = 0;
3506 shstrtab_hdr->sh_addr = 0;
3507 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3508 shstrtab_hdr->sh_entsize = 0;
3509 shstrtab_hdr->sh_link = 0;
3510 shstrtab_hdr->sh_info = 0;
3511 /* sh_offset is set in assign_file_positions_except_relocs. */
3512 shstrtab_hdr->sh_addralign = 1;
3514 if (!assign_file_positions_except_relocs (abfd, link_info))
3517 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3520 Elf_Internal_Shdr *hdr;
3522 off = elf_tdata (abfd)->next_file_pos;
3524 hdr = &elf_tdata (abfd)->symtab_hdr;
3525 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3527 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3528 if (hdr->sh_size != 0)
3529 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3531 hdr = &elf_tdata (abfd)->strtab_hdr;
3532 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3534 elf_tdata (abfd)->next_file_pos = off;
3536 /* Now that we know where the .strtab section goes, write it
3538 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3539 || ! _bfd_stringtab_emit (abfd, strtab))
3541 _bfd_stringtab_free (strtab);
3544 abfd->output_has_begun = TRUE;
3549 /* Create a mapping from a set of sections to a program segment. */
3551 static struct elf_segment_map *
3552 make_mapping (bfd *abfd,
3553 asection **sections,
3558 struct elf_segment_map *m;
3563 amt = sizeof (struct elf_segment_map);
3564 amt += (to - from - 1) * sizeof (asection *);
3565 m = bfd_zalloc (abfd, amt);
3569 m->p_type = PT_LOAD;
3570 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3571 m->sections[i - from] = *hdrpp;
3572 m->count = to - from;
3574 if (from == 0 && phdr)
3576 /* Include the headers in the first PT_LOAD segment. */
3577 m->includes_filehdr = 1;
3578 m->includes_phdrs = 1;
3584 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3587 struct elf_segment_map *
3588 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3590 struct elf_segment_map *m;
3592 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3596 m->p_type = PT_DYNAMIC;
3598 m->sections[0] = dynsec;
3603 /* Set up a mapping from BFD sections to program segments. */
3606 map_sections_to_segments (bfd *abfd)
3608 asection **sections = NULL;
3612 struct elf_segment_map *mfirst;
3613 struct elf_segment_map **pm;
3614 struct elf_segment_map *m;
3617 unsigned int phdr_index;
3618 bfd_vma maxpagesize;
3620 bfd_boolean phdr_in_segment = TRUE;
3621 bfd_boolean writable;
3623 asection *first_tls = NULL;
3624 asection *dynsec, *eh_frame_hdr;
3627 if (elf_tdata (abfd)->segment_map != NULL)
3630 if (bfd_count_sections (abfd) == 0)
3633 /* Select the allocated sections, and sort them. */
3635 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3636 if (sections == NULL)
3640 for (s = abfd->sections; s != NULL; s = s->next)
3642 if ((s->flags & SEC_ALLOC) != 0)
3648 BFD_ASSERT (i <= bfd_count_sections (abfd));
3651 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3653 /* Build the mapping. */
3658 /* If we have a .interp section, then create a PT_PHDR segment for
3659 the program headers and a PT_INTERP segment for the .interp
3661 s = bfd_get_section_by_name (abfd, ".interp");
3662 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3664 amt = sizeof (struct elf_segment_map);
3665 m = bfd_zalloc (abfd, amt);
3669 m->p_type = PT_PHDR;
3670 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3671 m->p_flags = PF_R | PF_X;
3672 m->p_flags_valid = 1;
3673 m->includes_phdrs = 1;
3678 amt = sizeof (struct elf_segment_map);
3679 m = bfd_zalloc (abfd, amt);
3683 m->p_type = PT_INTERP;
3691 /* Look through the sections. We put sections in the same program
3692 segment when the start of the second section can be placed within
3693 a few bytes of the end of the first section. */
3697 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3699 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3701 && (dynsec->flags & SEC_LOAD) == 0)
3704 /* Deal with -Ttext or something similar such that the first section
3705 is not adjacent to the program headers. This is an
3706 approximation, since at this point we don't know exactly how many
3707 program headers we will need. */
3710 bfd_size_type phdr_size;
3712 phdr_size = elf_tdata (abfd)->program_header_size;
3714 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3715 if ((abfd->flags & D_PAGED) == 0
3716 || sections[0]->lma < phdr_size
3717 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3718 phdr_in_segment = FALSE;
3721 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3724 bfd_boolean new_segment;
3728 /* See if this section and the last one will fit in the same
3731 if (last_hdr == NULL)
3733 /* If we don't have a segment yet, then we don't need a new
3734 one (we build the last one after this loop). */
3735 new_segment = FALSE;
3737 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3739 /* If this section has a different relation between the
3740 virtual address and the load address, then we need a new
3744 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3745 < BFD_ALIGN (hdr->lma, maxpagesize))
3747 /* If putting this section in this segment would force us to
3748 skip a page in the segment, then we need a new segment. */
3751 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3752 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3754 /* We don't want to put a loadable section after a
3755 nonloadable section in the same segment.
3756 Consider .tbss sections as loadable for this purpose. */
3759 else if ((abfd->flags & D_PAGED) == 0)
3761 /* If the file is not demand paged, which means that we
3762 don't require the sections to be correctly aligned in the
3763 file, then there is no other reason for a new segment. */
3764 new_segment = FALSE;
3767 && (hdr->flags & SEC_READONLY) == 0
3768 && (((last_hdr->lma + last_size - 1)
3769 & ~(maxpagesize - 1))
3770 != (hdr->lma & ~(maxpagesize - 1))))
3772 /* We don't want to put a writable section in a read only
3773 segment, unless they are on the same page in memory
3774 anyhow. We already know that the last section does not
3775 bring us past the current section on the page, so the
3776 only case in which the new section is not on the same
3777 page as the previous section is when the previous section
3778 ends precisely on a page boundary. */
3783 /* Otherwise, we can use the same segment. */
3784 new_segment = FALSE;
3789 if ((hdr->flags & SEC_READONLY) == 0)
3792 /* .tbss sections effectively have zero size. */
3793 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3794 last_size = hdr->size;
3800 /* We need a new program segment. We must create a new program
3801 header holding all the sections from phdr_index until hdr. */
3803 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3810 if ((hdr->flags & SEC_READONLY) == 0)
3816 /* .tbss sections effectively have zero size. */
3817 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3818 last_size = hdr->size;
3822 phdr_in_segment = FALSE;
3825 /* Create a final PT_LOAD program segment. */
3826 if (last_hdr != NULL)
3828 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3836 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3839 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3846 /* For each loadable .note section, add a PT_NOTE segment. We don't
3847 use bfd_get_section_by_name, because if we link together
3848 nonloadable .note sections and loadable .note sections, we will
3849 generate two .note sections in the output file. FIXME: Using
3850 names for section types is bogus anyhow. */
3851 for (s = abfd->sections; s != NULL; s = s->next)
3853 if ((s->flags & SEC_LOAD) != 0
3854 && strncmp (s->name, ".note", 5) == 0)
3856 amt = sizeof (struct elf_segment_map);
3857 m = bfd_zalloc (abfd, amt);
3861 m->p_type = PT_NOTE;
3868 if (s->flags & SEC_THREAD_LOCAL)
3876 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3881 amt = sizeof (struct elf_segment_map);
3882 amt += (tls_count - 1) * sizeof (asection *);
3883 m = bfd_zalloc (abfd, amt);
3888 m->count = tls_count;
3889 /* Mandated PF_R. */
3891 m->p_flags_valid = 1;
3892 for (i = 0; i < tls_count; ++i)
3894 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3895 m->sections[i] = first_tls;
3896 first_tls = first_tls->next;
3903 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3905 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3906 if (eh_frame_hdr != NULL
3907 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3909 amt = sizeof (struct elf_segment_map);
3910 m = bfd_zalloc (abfd, amt);
3914 m->p_type = PT_GNU_EH_FRAME;
3916 m->sections[0] = eh_frame_hdr->output_section;
3922 if (elf_tdata (abfd)->stack_flags)
3924 amt = sizeof (struct elf_segment_map);
3925 m = bfd_zalloc (abfd, amt);
3929 m->p_type = PT_GNU_STACK;
3930 m->p_flags = elf_tdata (abfd)->stack_flags;
3931 m->p_flags_valid = 1;
3937 if (elf_tdata (abfd)->relro)
3939 amt = sizeof (struct elf_segment_map);
3940 m = bfd_zalloc (abfd, amt);
3944 m->p_type = PT_GNU_RELRO;
3946 m->p_flags_valid = 1;
3955 elf_tdata (abfd)->segment_map = mfirst;
3959 if (sections != NULL)
3964 /* Sort sections by address. */
3967 elf_sort_sections (const void *arg1, const void *arg2)
3969 const asection *sec1 = *(const asection **) arg1;
3970 const asection *sec2 = *(const asection **) arg2;
3971 bfd_size_type size1, size2;
3973 /* Sort by LMA first, since this is the address used to
3974 place the section into a segment. */
3975 if (sec1->lma < sec2->lma)
3977 else if (sec1->lma > sec2->lma)
3980 /* Then sort by VMA. Normally the LMA and the VMA will be
3981 the same, and this will do nothing. */
3982 if (sec1->vma < sec2->vma)
3984 else if (sec1->vma > sec2->vma)
3987 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3989 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3995 /* If the indicies are the same, do not return 0
3996 here, but continue to try the next comparison. */
3997 if (sec1->target_index - sec2->target_index != 0)
3998 return sec1->target_index - sec2->target_index;
4003 else if (TOEND (sec2))
4008 /* Sort by size, to put zero sized sections
4009 before others at the same address. */
4011 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4012 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4019 return sec1->target_index - sec2->target_index;
4022 /* Ian Lance Taylor writes:
4024 We shouldn't be using % with a negative signed number. That's just
4025 not good. We have to make sure either that the number is not
4026 negative, or that the number has an unsigned type. When the types
4027 are all the same size they wind up as unsigned. When file_ptr is a
4028 larger signed type, the arithmetic winds up as signed long long,
4031 What we're trying to say here is something like ``increase OFF by
4032 the least amount that will cause it to be equal to the VMA modulo
4034 /* In other words, something like:
4036 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4037 off_offset = off % bed->maxpagesize;
4038 if (vma_offset < off_offset)
4039 adjustment = vma_offset + bed->maxpagesize - off_offset;
4041 adjustment = vma_offset - off_offset;
4043 which can can be collapsed into the expression below. */
4046 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4048 return ((vma - off) % maxpagesize);
4051 /* Assign file positions to the sections based on the mapping from
4052 sections to segments. This function also sets up some fields in
4053 the file header, and writes out the program headers. */
4056 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
4058 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4060 struct elf_segment_map *m;
4062 Elf_Internal_Phdr *phdrs;
4064 bfd_vma filehdr_vaddr, filehdr_paddr;
4065 bfd_vma phdrs_vaddr, phdrs_paddr;
4066 Elf_Internal_Phdr *p;
4068 if (elf_tdata (abfd)->segment_map == NULL)
4070 if (! map_sections_to_segments (abfd))
4075 /* The placement algorithm assumes that non allocated sections are
4076 not in PT_LOAD segments. We ensure this here by removing such
4077 sections from the segment map. We also remove excluded
4079 for (m = elf_tdata (abfd)->segment_map;
4083 unsigned int new_count;
4087 for (i = 0; i < m->count; i ++)
4089 if ((m->sections[i]->flags & SEC_EXCLUDE) == 0
4090 && ((m->sections[i]->flags & SEC_ALLOC) != 0
4091 || m->p_type != PT_LOAD))
4094 m->sections[new_count] = m->sections[i];
4100 if (new_count != m->count)
4101 m->count = new_count;
4105 if (bed->elf_backend_modify_segment_map)
4107 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4112 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4115 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4116 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4117 elf_elfheader (abfd)->e_phnum = count;
4121 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4125 /* If we already counted the number of program segments, make sure
4126 that we allocated enough space. This happens when SIZEOF_HEADERS
4127 is used in a linker script. */
4128 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4129 if (alloc != 0 && count > alloc)
4131 ((*_bfd_error_handler)
4132 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4133 abfd, alloc, count));
4134 bfd_set_error (bfd_error_bad_value);
4141 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4145 off = bed->s->sizeof_ehdr;
4146 off += alloc * bed->s->sizeof_phdr;
4153 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4160 /* If elf_segment_map is not from map_sections_to_segments, the
4161 sections may not be correctly ordered. NOTE: sorting should
4162 not be done to the PT_NOTE section of a corefile, which may
4163 contain several pseudo-sections artificially created by bfd.
4164 Sorting these pseudo-sections breaks things badly. */
4166 && !(elf_elfheader (abfd)->e_type == ET_CORE
4167 && m->p_type == PT_NOTE))
4168 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4171 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4172 number of sections with contents contributing to both p_filesz
4173 and p_memsz, followed by a number of sections with no contents
4174 that just contribute to p_memsz. In this loop, OFF tracks next
4175 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4176 an adjustment we use for segments that have no file contents
4177 but need zero filled memory allocation. */
4179 p->p_type = m->p_type;
4180 p->p_flags = m->p_flags;
4182 if (p->p_type == PT_LOAD
4185 bfd_size_type align;
4187 unsigned int align_power = 0;
4189 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4191 unsigned int secalign;
4193 secalign = bfd_get_section_alignment (abfd, *secpp);
4194 if (secalign > align_power)
4195 align_power = secalign;
4197 align = (bfd_size_type) 1 << align_power;
4199 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > align)
4200 align = bed->maxpagesize;
4202 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4205 && !m->includes_filehdr
4206 && !m->includes_phdrs
4207 && (ufile_ptr) off >= align)
4209 /* If the first section isn't loadable, the same holds for
4210 any other sections. Since the segment won't need file
4211 space, we can make p_offset overlap some prior segment.
4212 However, .tbss is special. If a segment starts with
4213 .tbss, we need to look at the next section to decide
4214 whether the segment has any loadable sections. */
4216 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4218 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4222 voff = adjust - align;
4228 /* Make sure the .dynamic section is the first section in the
4229 PT_DYNAMIC segment. */
4230 else if (p->p_type == PT_DYNAMIC
4232 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4235 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4237 bfd_set_error (bfd_error_bad_value);
4244 p->p_vaddr = m->sections[0]->vma;
4246 if (m->p_paddr_valid)
4247 p->p_paddr = m->p_paddr;
4248 else if (m->count == 0)
4251 p->p_paddr = m->sections[0]->lma;
4253 if (p->p_type == PT_LOAD
4254 && (abfd->flags & D_PAGED) != 0)
4255 p->p_align = bed->maxpagesize;
4256 else if (m->count == 0)
4257 p->p_align = 1 << bed->s->log_file_align;
4265 if (m->includes_filehdr)
4267 if (! m->p_flags_valid)
4270 p->p_filesz = bed->s->sizeof_ehdr;
4271 p->p_memsz = bed->s->sizeof_ehdr;
4274 BFD_ASSERT (p->p_type == PT_LOAD);
4276 if (p->p_vaddr < (bfd_vma) off)
4278 (*_bfd_error_handler)
4279 (_("%B: Not enough room for program headers, try linking with -N"),
4281 bfd_set_error (bfd_error_bad_value);
4286 if (! m->p_paddr_valid)
4289 if (p->p_type == PT_LOAD)
4291 filehdr_vaddr = p->p_vaddr;
4292 filehdr_paddr = p->p_paddr;
4296 if (m->includes_phdrs)
4298 if (! m->p_flags_valid)
4301 if (m->includes_filehdr)
4303 if (p->p_type == PT_LOAD)
4305 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4306 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4311 p->p_offset = bed->s->sizeof_ehdr;
4315 BFD_ASSERT (p->p_type == PT_LOAD);
4316 p->p_vaddr -= off - p->p_offset;
4317 if (! m->p_paddr_valid)
4318 p->p_paddr -= off - p->p_offset;
4321 if (p->p_type == PT_LOAD)
4323 phdrs_vaddr = p->p_vaddr;
4324 phdrs_paddr = p->p_paddr;
4327 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4330 p->p_filesz += alloc * bed->s->sizeof_phdr;
4331 p->p_memsz += alloc * bed->s->sizeof_phdr;
4334 if (p->p_type == PT_LOAD
4335 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4337 if (! m->includes_filehdr && ! m->includes_phdrs)
4338 p->p_offset = off + voff;
4343 adjust = off - (p->p_offset + p->p_filesz);
4344 p->p_filesz += adjust;
4345 p->p_memsz += adjust;
4349 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4353 bfd_size_type align;
4357 align = 1 << bfd_get_section_alignment (abfd, sec);
4359 if (p->p_type == PT_LOAD
4360 || p->p_type == PT_TLS)
4362 bfd_signed_vma adjust;
4364 if ((flags & SEC_LOAD) != 0)
4366 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4369 (*_bfd_error_handler)
4370 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4371 abfd, sec, (unsigned long) sec->lma);
4375 p->p_filesz += adjust;
4376 p->p_memsz += adjust;
4378 /* .tbss is special. It doesn't contribute to p_memsz of
4380 else if ((flags & SEC_THREAD_LOCAL) == 0
4381 || p->p_type == PT_TLS)
4383 /* The section VMA must equal the file position
4384 modulo the page size. */
4385 bfd_size_type page = align;
4386 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > page)
4387 page = bed->maxpagesize;
4388 adjust = vma_page_aligned_bias (sec->vma,
4389 p->p_vaddr + p->p_memsz,
4391 p->p_memsz += adjust;
4395 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4397 /* The section at i == 0 is the one that actually contains
4403 p->p_filesz = sec->size;
4409 /* The rest are fake sections that shouldn't be written. */
4418 if (p->p_type == PT_LOAD)
4421 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4422 1997, and the exact reason for it isn't clear. One
4423 plausible explanation is that it is to work around
4424 a problem we have with linker scripts using data
4425 statements in NOLOAD sections. I don't think it
4426 makes a great deal of sense to have such a section
4427 assigned to a PT_LOAD segment, but apparently
4428 people do this. The data statement results in a
4429 bfd_data_link_order being built, and these need
4430 section contents to write into. Eventually, we get
4431 to _bfd_elf_write_object_contents which writes any
4432 section with contents to the output. Make room
4433 here for the write, so that following segments are
4435 if ((flags & SEC_LOAD) != 0
4436 || (flags & SEC_HAS_CONTENTS) != 0)
4440 if ((flags & SEC_LOAD) != 0)
4442 p->p_filesz += sec->size;
4443 p->p_memsz += sec->size;
4445 /* PR ld/594: Sections in note segments which are not loaded
4446 contribute to the file size but not the in-memory size. */
4447 else if (p->p_type == PT_NOTE
4448 && (flags & SEC_HAS_CONTENTS) != 0)
4449 p->p_filesz += sec->size;
4451 /* .tbss is special. It doesn't contribute to p_memsz of
4453 else if ((flags & SEC_THREAD_LOCAL) == 0
4454 || p->p_type == PT_TLS)
4455 p->p_memsz += sec->size;
4457 if (p->p_type == PT_TLS
4459 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4461 struct bfd_link_order *o;
4462 bfd_vma tbss_size = 0;
4464 for (o = sec->map_head.link_order; o != NULL; o = o->next)
4465 if (tbss_size < o->offset + o->size)
4466 tbss_size = o->offset + o->size;
4468 p->p_memsz += tbss_size;
4471 if (align > p->p_align
4472 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4476 if (! m->p_flags_valid)
4479 if ((flags & SEC_CODE) != 0)
4481 if ((flags & SEC_READONLY) == 0)
4487 /* Now that we have set the section file positions, we can set up
4488 the file positions for the non PT_LOAD segments. */
4489 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4493 if (p->p_type != PT_LOAD && m->count > 0)
4495 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4496 /* If the section has not yet been assigned a file position,
4497 do so now. The ARM BPABI requires that .dynamic section
4498 not be marked SEC_ALLOC because it is not part of any
4499 PT_LOAD segment, so it will not be processed above. */
4500 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4503 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4506 while (i_shdrpp[i]->bfd_section != m->sections[0])
4508 off = (_bfd_elf_assign_file_position_for_section
4509 (i_shdrpp[i], off, TRUE));
4510 p->p_filesz = m->sections[0]->size;
4512 p->p_offset = m->sections[0]->filepos;
4516 if (m->includes_filehdr)
4518 p->p_vaddr = filehdr_vaddr;
4519 if (! m->p_paddr_valid)
4520 p->p_paddr = filehdr_paddr;
4522 else if (m->includes_phdrs)
4524 p->p_vaddr = phdrs_vaddr;
4525 if (! m->p_paddr_valid)
4526 p->p_paddr = phdrs_paddr;
4528 else if (p->p_type == PT_GNU_RELRO)
4530 Elf_Internal_Phdr *lp;
4532 for (lp = phdrs; lp < phdrs + count; ++lp)
4534 if (lp->p_type == PT_LOAD
4535 && lp->p_vaddr <= link_info->relro_end
4536 && lp->p_vaddr >= link_info->relro_start
4537 && lp->p_vaddr + lp->p_filesz
4538 >= link_info->relro_end)
4542 if (lp < phdrs + count
4543 && link_info->relro_end > lp->p_vaddr)
4545 p->p_vaddr = lp->p_vaddr;
4546 p->p_paddr = lp->p_paddr;
4547 p->p_offset = lp->p_offset;
4548 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4549 p->p_memsz = p->p_filesz;
4551 p->p_flags = (lp->p_flags & ~PF_W);
4555 memset (p, 0, sizeof *p);
4556 p->p_type = PT_NULL;
4562 /* Clear out any program headers we allocated but did not use. */
4563 for (; count < alloc; count++, p++)
4565 memset (p, 0, sizeof *p);
4566 p->p_type = PT_NULL;
4569 elf_tdata (abfd)->phdr = phdrs;
4571 elf_tdata (abfd)->next_file_pos = off;
4573 /* Write out the program headers. */
4574 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4575 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4581 /* Get the size of the program header.
4583 If this is called by the linker before any of the section VMA's are set, it
4584 can't calculate the correct value for a strange memory layout. This only
4585 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4586 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4587 data segment (exclusive of .interp and .dynamic).
4589 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4590 will be two segments. */
4592 static bfd_size_type
4593 get_program_header_size (bfd *abfd)
4597 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4599 /* We can't return a different result each time we're called. */
4600 if (elf_tdata (abfd)->program_header_size != 0)
4601 return elf_tdata (abfd)->program_header_size;
4603 if (elf_tdata (abfd)->segment_map != NULL)
4605 struct elf_segment_map *m;
4608 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4610 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4611 return elf_tdata (abfd)->program_header_size;
4614 /* Assume we will need exactly two PT_LOAD segments: one for text
4615 and one for data. */
4618 s = bfd_get_section_by_name (abfd, ".interp");
4619 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4621 /* If we have a loadable interpreter section, we need a
4622 PT_INTERP segment. In this case, assume we also need a
4623 PT_PHDR segment, although that may not be true for all
4628 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4630 /* We need a PT_DYNAMIC segment. */
4634 if (elf_tdata (abfd)->eh_frame_hdr)
4636 /* We need a PT_GNU_EH_FRAME segment. */
4640 if (elf_tdata (abfd)->stack_flags)
4642 /* We need a PT_GNU_STACK segment. */
4646 if (elf_tdata (abfd)->relro)
4648 /* We need a PT_GNU_RELRO segment. */
4652 for (s = abfd->sections; s != NULL; s = s->next)
4654 if ((s->flags & SEC_LOAD) != 0
4655 && strncmp (s->name, ".note", 5) == 0)
4657 /* We need a PT_NOTE segment. */
4662 for (s = abfd->sections; s != NULL; s = s->next)
4664 if (s->flags & SEC_THREAD_LOCAL)
4666 /* We need a PT_TLS segment. */
4672 /* Let the backend count up any program headers it might need. */
4673 if (bed->elf_backend_additional_program_headers)
4677 a = (*bed->elf_backend_additional_program_headers) (abfd);
4683 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4684 return elf_tdata (abfd)->program_header_size;
4687 /* Work out the file positions of all the sections. This is called by
4688 _bfd_elf_compute_section_file_positions. All the section sizes and
4689 VMAs must be known before this is called.
4691 Reloc sections come in two flavours: Those processed specially as
4692 "side-channel" data attached to a section to which they apply, and
4693 those that bfd doesn't process as relocations. The latter sort are
4694 stored in a normal bfd section by bfd_section_from_shdr. We don't
4695 consider the former sort here, unless they form part of the loadable
4696 image. Reloc sections not assigned here will be handled later by
4697 assign_file_positions_for_relocs.
4699 We also don't set the positions of the .symtab and .strtab here. */
4702 assign_file_positions_except_relocs (bfd *abfd,
4703 struct bfd_link_info *link_info)
4705 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4706 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4707 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4708 unsigned int num_sec = elf_numsections (abfd);
4710 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4712 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4713 && bfd_get_format (abfd) != bfd_core)
4715 Elf_Internal_Shdr **hdrpp;
4718 /* Start after the ELF header. */
4719 off = i_ehdrp->e_ehsize;
4721 /* We are not creating an executable, which means that we are
4722 not creating a program header, and that the actual order of
4723 the sections in the file is unimportant. */
4724 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4726 Elf_Internal_Shdr *hdr;
4729 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4730 && hdr->bfd_section == NULL)
4731 || i == tdata->symtab_section
4732 || i == tdata->symtab_shndx_section
4733 || i == tdata->strtab_section)
4735 hdr->sh_offset = -1;
4738 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4740 if (i == SHN_LORESERVE - 1)
4742 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4743 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4750 Elf_Internal_Shdr **hdrpp;
4752 /* Assign file positions for the loaded sections based on the
4753 assignment of sections to segments. */
4754 if (! assign_file_positions_for_segments (abfd, link_info))
4757 /* Assign file positions for the other sections. */
4759 off = elf_tdata (abfd)->next_file_pos;
4760 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4762 Elf_Internal_Shdr *hdr;
4765 if (hdr->bfd_section != NULL
4766 && hdr->bfd_section->filepos != 0)
4767 hdr->sh_offset = hdr->bfd_section->filepos;
4768 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4770 ((*_bfd_error_handler)
4771 (_("%B: warning: allocated section `%s' not in segment"),
4773 (hdr->bfd_section == NULL
4775 : hdr->bfd_section->name)));
4776 if ((abfd->flags & D_PAGED) != 0)
4777 off += vma_page_aligned_bias (hdr->sh_addr, off,
4780 off += vma_page_aligned_bias (hdr->sh_addr, off,
4782 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4785 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4786 && hdr->bfd_section == NULL)
4787 || hdr == i_shdrpp[tdata->symtab_section]
4788 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4789 || hdr == i_shdrpp[tdata->strtab_section])
4790 hdr->sh_offset = -1;
4792 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4794 if (i == SHN_LORESERVE - 1)
4796 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4797 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4802 /* Place the section headers. */
4803 off = align_file_position (off, 1 << bed->s->log_file_align);
4804 i_ehdrp->e_shoff = off;
4805 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4807 elf_tdata (abfd)->next_file_pos = off;
4813 prep_headers (bfd *abfd)
4815 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4816 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4817 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4818 struct elf_strtab_hash *shstrtab;
4819 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4821 i_ehdrp = elf_elfheader (abfd);
4822 i_shdrp = elf_elfsections (abfd);
4824 shstrtab = _bfd_elf_strtab_init ();
4825 if (shstrtab == NULL)
4828 elf_shstrtab (abfd) = shstrtab;
4830 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4831 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4832 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4833 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4835 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4836 i_ehdrp->e_ident[EI_DATA] =
4837 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4838 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4840 if ((abfd->flags & DYNAMIC) != 0)
4841 i_ehdrp->e_type = ET_DYN;
4842 else if ((abfd->flags & EXEC_P) != 0)
4843 i_ehdrp->e_type = ET_EXEC;
4844 else if (bfd_get_format (abfd) == bfd_core)
4845 i_ehdrp->e_type = ET_CORE;
4847 i_ehdrp->e_type = ET_REL;
4849 switch (bfd_get_arch (abfd))
4851 case bfd_arch_unknown:
4852 i_ehdrp->e_machine = EM_NONE;
4855 /* There used to be a long list of cases here, each one setting
4856 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4857 in the corresponding bfd definition. To avoid duplication,
4858 the switch was removed. Machines that need special handling
4859 can generally do it in elf_backend_final_write_processing(),
4860 unless they need the information earlier than the final write.
4861 Such need can generally be supplied by replacing the tests for
4862 e_machine with the conditions used to determine it. */
4864 i_ehdrp->e_machine = bed->elf_machine_code;
4867 i_ehdrp->e_version = bed->s->ev_current;
4868 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4870 /* No program header, for now. */
4871 i_ehdrp->e_phoff = 0;
4872 i_ehdrp->e_phentsize = 0;
4873 i_ehdrp->e_phnum = 0;
4875 /* Each bfd section is section header entry. */
4876 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4877 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4879 /* If we're building an executable, we'll need a program header table. */
4880 if (abfd->flags & EXEC_P)
4881 /* It all happens later. */
4885 i_ehdrp->e_phentsize = 0;
4887 i_ehdrp->e_phoff = 0;
4890 elf_tdata (abfd)->symtab_hdr.sh_name =
4891 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4892 elf_tdata (abfd)->strtab_hdr.sh_name =
4893 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4894 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4895 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4896 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4897 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4898 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4904 /* Assign file positions for all the reloc sections which are not part
4905 of the loadable file image. */
4908 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4911 unsigned int i, num_sec;
4912 Elf_Internal_Shdr **shdrpp;
4914 off = elf_tdata (abfd)->next_file_pos;
4916 num_sec = elf_numsections (abfd);
4917 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4919 Elf_Internal_Shdr *shdrp;
4922 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4923 && shdrp->sh_offset == -1)
4924 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4927 elf_tdata (abfd)->next_file_pos = off;
4931 _bfd_elf_write_object_contents (bfd *abfd)
4933 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4934 Elf_Internal_Ehdr *i_ehdrp;
4935 Elf_Internal_Shdr **i_shdrp;
4937 unsigned int count, num_sec;
4939 if (! abfd->output_has_begun
4940 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4943 i_shdrp = elf_elfsections (abfd);
4944 i_ehdrp = elf_elfheader (abfd);
4947 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4951 _bfd_elf_assign_file_positions_for_relocs (abfd);
4953 /* After writing the headers, we need to write the sections too... */
4954 num_sec = elf_numsections (abfd);
4955 for (count = 1; count < num_sec; count++)
4957 if (bed->elf_backend_section_processing)
4958 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4959 if (i_shdrp[count]->contents)
4961 bfd_size_type amt = i_shdrp[count]->sh_size;
4963 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4964 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4967 if (count == SHN_LORESERVE - 1)
4968 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4971 /* Write out the section header names. */
4972 if (elf_shstrtab (abfd) != NULL
4973 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4974 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4977 if (bed->elf_backend_final_write_processing)
4978 (*bed->elf_backend_final_write_processing) (abfd,
4979 elf_tdata (abfd)->linker);
4981 return bed->s->write_shdrs_and_ehdr (abfd);
4985 _bfd_elf_write_corefile_contents (bfd *abfd)
4987 /* Hopefully this can be done just like an object file. */
4988 return _bfd_elf_write_object_contents (abfd);
4991 /* Given a section, search the header to find them. */
4994 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4996 const struct elf_backend_data *bed;
4999 if (elf_section_data (asect) != NULL
5000 && elf_section_data (asect)->this_idx != 0)
5001 return elf_section_data (asect)->this_idx;
5003 if (bfd_is_abs_section (asect))
5005 else if (bfd_is_com_section (asect))
5007 else if (bfd_is_und_section (asect))
5012 bed = get_elf_backend_data (abfd);
5013 if (bed->elf_backend_section_from_bfd_section)
5017 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5022 bfd_set_error (bfd_error_nonrepresentable_section);
5027 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5031 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5033 asymbol *asym_ptr = *asym_ptr_ptr;
5035 flagword flags = asym_ptr->flags;
5037 /* When gas creates relocations against local labels, it creates its
5038 own symbol for the section, but does put the symbol into the
5039 symbol chain, so udata is 0. When the linker is generating
5040 relocatable output, this section symbol may be for one of the
5041 input sections rather than the output section. */
5042 if (asym_ptr->udata.i == 0
5043 && (flags & BSF_SECTION_SYM)
5044 && asym_ptr->section)
5048 if (asym_ptr->section->output_section != NULL)
5049 indx = asym_ptr->section->output_section->index;
5051 indx = asym_ptr->section->index;
5052 if (indx < elf_num_section_syms (abfd)
5053 && elf_section_syms (abfd)[indx] != NULL)
5054 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5057 idx = asym_ptr->udata.i;
5061 /* This case can occur when using --strip-symbol on a symbol
5062 which is used in a relocation entry. */
5063 (*_bfd_error_handler)
5064 (_("%B: symbol `%s' required but not present"),
5065 abfd, bfd_asymbol_name (asym_ptr));
5066 bfd_set_error (bfd_error_no_symbols);
5073 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5074 (long) asym_ptr, asym_ptr->name, idx, flags,
5075 elf_symbol_flags (flags));
5083 /* Copy private BFD data. This copies any program header information. */
5086 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5088 Elf_Internal_Ehdr *iehdr;
5089 struct elf_segment_map *map;
5090 struct elf_segment_map *map_first;
5091 struct elf_segment_map **pointer_to_map;
5092 Elf_Internal_Phdr *segment;
5095 unsigned int num_segments;
5096 bfd_boolean phdr_included = FALSE;
5097 bfd_vma maxpagesize;
5098 struct elf_segment_map *phdr_adjust_seg = NULL;
5099 unsigned int phdr_adjust_num = 0;
5100 const struct elf_backend_data *bed;
5102 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5103 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5106 if (elf_tdata (ibfd)->phdr == NULL)
5109 bed = get_elf_backend_data (ibfd);
5110 iehdr = elf_elfheader (ibfd);
5113 pointer_to_map = &map_first;
5115 num_segments = elf_elfheader (ibfd)->e_phnum;
5116 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5118 /* Returns the end address of the segment + 1. */
5119 #define SEGMENT_END(segment, start) \
5120 (start + (segment->p_memsz > segment->p_filesz \
5121 ? segment->p_memsz : segment->p_filesz))
5123 #define SECTION_SIZE(section, segment) \
5124 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5125 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5126 ? section->size : 0)
5128 /* Returns TRUE if the given section is contained within
5129 the given segment. VMA addresses are compared. */
5130 #define IS_CONTAINED_BY_VMA(section, segment) \
5131 (section->vma >= segment->p_vaddr \
5132 && (section->vma + SECTION_SIZE (section, segment) \
5133 <= (SEGMENT_END (segment, segment->p_vaddr))))
5135 /* Returns TRUE if the given section is contained within
5136 the given segment. LMA addresses are compared. */
5137 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5138 (section->lma >= base \
5139 && (section->lma + SECTION_SIZE (section, segment) \
5140 <= SEGMENT_END (segment, base)))
5142 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5143 #define IS_COREFILE_NOTE(p, s) \
5144 (p->p_type == PT_NOTE \
5145 && bfd_get_format (ibfd) == bfd_core \
5146 && s->vma == 0 && s->lma == 0 \
5147 && (bfd_vma) s->filepos >= p->p_offset \
5148 && ((bfd_vma) s->filepos + s->size \
5149 <= p->p_offset + p->p_filesz))
5151 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5152 linker, which generates a PT_INTERP section with p_vaddr and
5153 p_memsz set to 0. */
5154 #define IS_SOLARIS_PT_INTERP(p, s) \
5156 && p->p_paddr == 0 \
5157 && p->p_memsz == 0 \
5158 && p->p_filesz > 0 \
5159 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5161 && (bfd_vma) s->filepos >= p->p_offset \
5162 && ((bfd_vma) s->filepos + s->size \
5163 <= p->p_offset + p->p_filesz))
5165 /* Decide if the given section should be included in the given segment.
5166 A section will be included if:
5167 1. It is within the address space of the segment -- we use the LMA
5168 if that is set for the segment and the VMA otherwise,
5169 2. It is an allocated segment,
5170 3. There is an output section associated with it,
5171 4. The section has not already been allocated to a previous segment.
5172 5. PT_GNU_STACK segments do not include any sections.
5173 6. PT_TLS segment includes only SHF_TLS sections.
5174 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5175 8. PT_DYNAMIC should not contain empty sections at the beginning
5176 (with the possible exception of .dynamic). */
5177 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5178 ((((segment->p_paddr \
5179 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5180 : IS_CONTAINED_BY_VMA (section, segment)) \
5181 && (section->flags & SEC_ALLOC) != 0) \
5182 || IS_COREFILE_NOTE (segment, section)) \
5183 && section->output_section != NULL \
5184 && segment->p_type != PT_GNU_STACK \
5185 && (segment->p_type != PT_TLS \
5186 || (section->flags & SEC_THREAD_LOCAL)) \
5187 && (segment->p_type == PT_LOAD \
5188 || segment->p_type == PT_TLS \
5189 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5190 && (segment->p_type != PT_DYNAMIC \
5191 || SECTION_SIZE (section, segment) > 0 \
5192 || (segment->p_paddr \
5193 ? segment->p_paddr != section->lma \
5194 : segment->p_vaddr != section->vma) \
5195 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5197 && ! section->segment_mark)
5199 /* Returns TRUE iff seg1 starts after the end of seg2. */
5200 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5201 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5203 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5204 their VMA address ranges and their LMA address ranges overlap.
5205 It is possible to have overlapping VMA ranges without overlapping LMA
5206 ranges. RedBoot images for example can have both .data and .bss mapped
5207 to the same VMA range, but with the .data section mapped to a different
5209 #define SEGMENT_OVERLAPS(seg1, seg2) \
5210 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5211 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5212 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5213 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5215 /* Initialise the segment mark field. */
5216 for (section = ibfd->sections; section != NULL; section = section->next)
5217 section->segment_mark = FALSE;
5219 /* Scan through the segments specified in the program header
5220 of the input BFD. For this first scan we look for overlaps
5221 in the loadable segments. These can be created by weird
5222 parameters to objcopy. Also, fix some solaris weirdness. */
5223 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5228 Elf_Internal_Phdr *segment2;
5230 if (segment->p_type == PT_INTERP)
5231 for (section = ibfd->sections; section; section = section->next)
5232 if (IS_SOLARIS_PT_INTERP (segment, section))
5234 /* Mininal change so that the normal section to segment
5235 assignment code will work. */
5236 segment->p_vaddr = section->vma;
5240 if (segment->p_type != PT_LOAD)
5243 /* Determine if this segment overlaps any previous segments. */
5244 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5246 bfd_signed_vma extra_length;
5248 if (segment2->p_type != PT_LOAD
5249 || ! SEGMENT_OVERLAPS (segment, segment2))
5252 /* Merge the two segments together. */
5253 if (segment2->p_vaddr < segment->p_vaddr)
5255 /* Extend SEGMENT2 to include SEGMENT and then delete
5258 SEGMENT_END (segment, segment->p_vaddr)
5259 - SEGMENT_END (segment2, segment2->p_vaddr);
5261 if (extra_length > 0)
5263 segment2->p_memsz += extra_length;
5264 segment2->p_filesz += extra_length;
5267 segment->p_type = PT_NULL;
5269 /* Since we have deleted P we must restart the outer loop. */
5271 segment = elf_tdata (ibfd)->phdr;
5276 /* Extend SEGMENT to include SEGMENT2 and then delete
5279 SEGMENT_END (segment2, segment2->p_vaddr)
5280 - SEGMENT_END (segment, segment->p_vaddr);
5282 if (extra_length > 0)
5284 segment->p_memsz += extra_length;
5285 segment->p_filesz += extra_length;
5288 segment2->p_type = PT_NULL;
5293 /* The second scan attempts to assign sections to segments. */
5294 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5298 unsigned int section_count;
5299 asection ** sections;
5300 asection * output_section;
5302 bfd_vma matching_lma;
5303 bfd_vma suggested_lma;
5307 if (segment->p_type == PT_NULL)
5310 /* Compute how many sections might be placed into this segment. */
5311 for (section = ibfd->sections, section_count = 0;
5313 section = section->next)
5314 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5317 /* Allocate a segment map big enough to contain
5318 all of the sections we have selected. */
5319 amt = sizeof (struct elf_segment_map);
5320 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5321 map = bfd_alloc (obfd, amt);
5325 /* Initialise the fields of the segment map. Default to
5326 using the physical address of the segment in the input BFD. */
5328 map->p_type = segment->p_type;
5329 map->p_flags = segment->p_flags;
5330 map->p_flags_valid = 1;
5331 map->p_paddr = segment->p_paddr;
5332 map->p_paddr_valid = 1;
5334 /* Determine if this segment contains the ELF file header
5335 and if it contains the program headers themselves. */
5336 map->includes_filehdr = (segment->p_offset == 0
5337 && segment->p_filesz >= iehdr->e_ehsize);
5339 map->includes_phdrs = 0;
5341 if (! phdr_included || segment->p_type != PT_LOAD)
5343 map->includes_phdrs =
5344 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5345 && (segment->p_offset + segment->p_filesz
5346 >= ((bfd_vma) iehdr->e_phoff
5347 + iehdr->e_phnum * iehdr->e_phentsize)));
5349 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5350 phdr_included = TRUE;
5353 if (section_count == 0)
5355 /* Special segments, such as the PT_PHDR segment, may contain
5356 no sections, but ordinary, loadable segments should contain
5357 something. They are allowed by the ELF spec however, so only
5358 a warning is produced. */
5359 if (segment->p_type == PT_LOAD)
5360 (*_bfd_error_handler)
5361 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5365 *pointer_to_map = map;
5366 pointer_to_map = &map->next;
5371 /* Now scan the sections in the input BFD again and attempt
5372 to add their corresponding output sections to the segment map.
5373 The problem here is how to handle an output section which has
5374 been moved (ie had its LMA changed). There are four possibilities:
5376 1. None of the sections have been moved.
5377 In this case we can continue to use the segment LMA from the
5380 2. All of the sections have been moved by the same amount.
5381 In this case we can change the segment's LMA to match the LMA
5382 of the first section.
5384 3. Some of the sections have been moved, others have not.
5385 In this case those sections which have not been moved can be
5386 placed in the current segment which will have to have its size,
5387 and possibly its LMA changed, and a new segment or segments will
5388 have to be created to contain the other sections.
5390 4. The sections have been moved, but not by the same amount.
5391 In this case we can change the segment's LMA to match the LMA
5392 of the first section and we will have to create a new segment
5393 or segments to contain the other sections.
5395 In order to save time, we allocate an array to hold the section
5396 pointers that we are interested in. As these sections get assigned
5397 to a segment, they are removed from this array. */
5399 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5400 to work around this long long bug. */
5401 sections = bfd_malloc2 (section_count, sizeof (asection *));
5402 if (sections == NULL)
5405 /* Step One: Scan for segment vs section LMA conflicts.
5406 Also add the sections to the section array allocated above.
5407 Also add the sections to the current segment. In the common
5408 case, where the sections have not been moved, this means that
5409 we have completely filled the segment, and there is nothing
5415 for (j = 0, section = ibfd->sections;
5417 section = section->next)
5419 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5421 output_section = section->output_section;
5423 sections[j ++] = section;
5425 /* The Solaris native linker always sets p_paddr to 0.
5426 We try to catch that case here, and set it to the
5427 correct value. Note - some backends require that
5428 p_paddr be left as zero. */
5429 if (segment->p_paddr == 0
5430 && segment->p_vaddr != 0
5431 && (! bed->want_p_paddr_set_to_zero)
5433 && output_section->lma != 0
5434 && (output_section->vma == (segment->p_vaddr
5435 + (map->includes_filehdr
5438 + (map->includes_phdrs
5440 * iehdr->e_phentsize)
5442 map->p_paddr = segment->p_vaddr;
5444 /* Match up the physical address of the segment with the
5445 LMA address of the output section. */
5446 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5447 || IS_COREFILE_NOTE (segment, section)
5448 || (bed->want_p_paddr_set_to_zero &&
5449 IS_CONTAINED_BY_VMA (output_section, segment))
5452 if (matching_lma == 0)
5453 matching_lma = output_section->lma;
5455 /* We assume that if the section fits within the segment
5456 then it does not overlap any other section within that
5458 map->sections[isec ++] = output_section;
5460 else if (suggested_lma == 0)
5461 suggested_lma = output_section->lma;
5465 BFD_ASSERT (j == section_count);
5467 /* Step Two: Adjust the physical address of the current segment,
5469 if (isec == section_count)
5471 /* All of the sections fitted within the segment as currently
5472 specified. This is the default case. Add the segment to
5473 the list of built segments and carry on to process the next
5474 program header in the input BFD. */
5475 map->count = section_count;
5476 *pointer_to_map = map;
5477 pointer_to_map = &map->next;
5484 if (matching_lma != 0)
5486 /* At least one section fits inside the current segment.
5487 Keep it, but modify its physical address to match the
5488 LMA of the first section that fitted. */
5489 map->p_paddr = matching_lma;
5493 /* None of the sections fitted inside the current segment.
5494 Change the current segment's physical address to match
5495 the LMA of the first section. */
5496 map->p_paddr = suggested_lma;
5499 /* Offset the segment physical address from the lma
5500 to allow for space taken up by elf headers. */
5501 if (map->includes_filehdr)
5502 map->p_paddr -= iehdr->e_ehsize;
5504 if (map->includes_phdrs)
5506 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5508 /* iehdr->e_phnum is just an estimate of the number
5509 of program headers that we will need. Make a note
5510 here of the number we used and the segment we chose
5511 to hold these headers, so that we can adjust the
5512 offset when we know the correct value. */
5513 phdr_adjust_num = iehdr->e_phnum;
5514 phdr_adjust_seg = map;
5518 /* Step Three: Loop over the sections again, this time assigning
5519 those that fit to the current segment and removing them from the
5520 sections array; but making sure not to leave large gaps. Once all
5521 possible sections have been assigned to the current segment it is
5522 added to the list of built segments and if sections still remain
5523 to be assigned, a new segment is constructed before repeating
5531 /* Fill the current segment with sections that fit. */
5532 for (j = 0; j < section_count; j++)
5534 section = sections[j];
5536 if (section == NULL)
5539 output_section = section->output_section;
5541 BFD_ASSERT (output_section != NULL);
5543 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5544 || IS_COREFILE_NOTE (segment, section))
5546 if (map->count == 0)
5548 /* If the first section in a segment does not start at
5549 the beginning of the segment, then something is
5551 if (output_section->lma !=
5553 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5554 + (map->includes_phdrs
5555 ? iehdr->e_phnum * iehdr->e_phentsize
5561 asection * prev_sec;
5563 prev_sec = map->sections[map->count - 1];
5565 /* If the gap between the end of the previous section
5566 and the start of this section is more than
5567 maxpagesize then we need to start a new segment. */
5568 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5570 < BFD_ALIGN (output_section->lma, maxpagesize))
5571 || ((prev_sec->lma + prev_sec->size)
5572 > output_section->lma))
5574 if (suggested_lma == 0)
5575 suggested_lma = output_section->lma;
5581 map->sections[map->count++] = output_section;
5584 section->segment_mark = TRUE;
5586 else if (suggested_lma == 0)
5587 suggested_lma = output_section->lma;
5590 BFD_ASSERT (map->count > 0);
5592 /* Add the current segment to the list of built segments. */
5593 *pointer_to_map = map;
5594 pointer_to_map = &map->next;
5596 if (isec < section_count)
5598 /* We still have not allocated all of the sections to
5599 segments. Create a new segment here, initialise it
5600 and carry on looping. */
5601 amt = sizeof (struct elf_segment_map);
5602 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5603 map = bfd_alloc (obfd, amt);
5610 /* Initialise the fields of the segment map. Set the physical
5611 physical address to the LMA of the first section that has
5612 not yet been assigned. */
5614 map->p_type = segment->p_type;
5615 map->p_flags = segment->p_flags;
5616 map->p_flags_valid = 1;
5617 map->p_paddr = suggested_lma;
5618 map->p_paddr_valid = 1;
5619 map->includes_filehdr = 0;
5620 map->includes_phdrs = 0;
5623 while (isec < section_count);
5628 /* The Solaris linker creates program headers in which all the
5629 p_paddr fields are zero. When we try to objcopy or strip such a
5630 file, we get confused. Check for this case, and if we find it
5631 reset the p_paddr_valid fields. */
5632 for (map = map_first; map != NULL; map = map->next)
5633 if (map->p_paddr != 0)
5636 for (map = map_first; map != NULL; map = map->next)
5637 map->p_paddr_valid = 0;
5639 elf_tdata (obfd)->segment_map = map_first;
5641 /* If we had to estimate the number of program headers that were
5642 going to be needed, then check our estimate now and adjust
5643 the offset if necessary. */
5644 if (phdr_adjust_seg != NULL)
5648 for (count = 0, map = map_first; map != NULL; map = map->next)
5651 if (count > phdr_adjust_num)
5652 phdr_adjust_seg->p_paddr
5653 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5658 #undef IS_CONTAINED_BY_VMA
5659 #undef IS_CONTAINED_BY_LMA
5660 #undef IS_COREFILE_NOTE
5661 #undef IS_SOLARIS_PT_INTERP
5662 #undef INCLUDE_SECTION_IN_SEGMENT
5663 #undef SEGMENT_AFTER_SEGMENT
5664 #undef SEGMENT_OVERLAPS
5668 /* Copy private section information. This copies over the entsize
5669 field, and sometimes the info field. */
5672 _bfd_elf_copy_private_section_data (bfd *ibfd,
5677 Elf_Internal_Shdr *ihdr, *ohdr;
5679 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5680 || obfd->xvec->flavour != bfd_target_elf_flavour)
5683 ihdr = &elf_section_data (isec)->this_hdr;
5684 ohdr = &elf_section_data (osec)->this_hdr;
5686 ohdr->sh_entsize = ihdr->sh_entsize;
5688 if (ihdr->sh_type == SHT_SYMTAB
5689 || ihdr->sh_type == SHT_DYNSYM
5690 || ihdr->sh_type == SHT_GNU_verneed
5691 || ihdr->sh_type == SHT_GNU_verdef)
5692 ohdr->sh_info = ihdr->sh_info;
5694 /* Set things up for objcopy. The output SHT_GROUP section will
5695 have its elf_next_in_group pointing back to the input group
5696 members. Ignore linker created group section. See
5697 elfNN_ia64_object_p in elfxx-ia64.c. We also need to handle
5698 elf_linked_to_section for SHF_LINK_ORDER. */
5700 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0
5701 && elf_linked_to_section (isec) != 0)
5702 elf_linked_to_section (osec)
5703 = elf_linked_to_section (isec)->output_section;
5705 if (elf_sec_group (isec) == NULL
5706 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5708 elf_next_in_group (osec) = elf_next_in_group (isec);
5709 elf_group_name (osec) = elf_group_name (isec);
5712 osec->use_rela_p = isec->use_rela_p;
5717 /* Copy private header information. */
5720 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5722 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5723 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5726 /* Copy over private BFD data if it has not already been copied.
5727 This must be done here, rather than in the copy_private_bfd_data
5728 entry point, because the latter is called after the section
5729 contents have been set, which means that the program headers have
5730 already been worked out. */
5731 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5733 if (! copy_private_bfd_data (ibfd, obfd))
5740 /* Copy private symbol information. If this symbol is in a section
5741 which we did not map into a BFD section, try to map the section
5742 index correctly. We use special macro definitions for the mapped
5743 section indices; these definitions are interpreted by the
5744 swap_out_syms function. */
5746 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5747 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5748 #define MAP_STRTAB (SHN_HIOS + 3)
5749 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5750 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5753 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5758 elf_symbol_type *isym, *osym;
5760 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5761 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5764 isym = elf_symbol_from (ibfd, isymarg);
5765 osym = elf_symbol_from (obfd, osymarg);
5769 && bfd_is_abs_section (isym->symbol.section))
5773 shndx = isym->internal_elf_sym.st_shndx;
5774 if (shndx == elf_onesymtab (ibfd))
5775 shndx = MAP_ONESYMTAB;
5776 else if (shndx == elf_dynsymtab (ibfd))
5777 shndx = MAP_DYNSYMTAB;
5778 else if (shndx == elf_tdata (ibfd)->strtab_section)
5780 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5781 shndx = MAP_SHSTRTAB;
5782 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5783 shndx = MAP_SYM_SHNDX;
5784 osym->internal_elf_sym.st_shndx = shndx;
5790 /* Swap out the symbols. */
5793 swap_out_syms (bfd *abfd,
5794 struct bfd_strtab_hash **sttp,
5797 const struct elf_backend_data *bed;
5800 struct bfd_strtab_hash *stt;
5801 Elf_Internal_Shdr *symtab_hdr;
5802 Elf_Internal_Shdr *symtab_shndx_hdr;
5803 Elf_Internal_Shdr *symstrtab_hdr;
5804 bfd_byte *outbound_syms;
5805 bfd_byte *outbound_shndx;
5808 bfd_boolean name_local_sections;
5810 if (!elf_map_symbols (abfd))
5813 /* Dump out the symtabs. */
5814 stt = _bfd_elf_stringtab_init ();
5818 bed = get_elf_backend_data (abfd);
5819 symcount = bfd_get_symcount (abfd);
5820 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5821 symtab_hdr->sh_type = SHT_SYMTAB;
5822 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5823 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5824 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5825 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5827 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5828 symstrtab_hdr->sh_type = SHT_STRTAB;
5830 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
5831 if (outbound_syms == NULL)
5833 _bfd_stringtab_free (stt);
5836 symtab_hdr->contents = outbound_syms;
5838 outbound_shndx = NULL;
5839 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5840 if (symtab_shndx_hdr->sh_name != 0)
5842 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5843 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
5844 sizeof (Elf_External_Sym_Shndx));
5845 if (outbound_shndx == NULL)
5847 _bfd_stringtab_free (stt);
5851 symtab_shndx_hdr->contents = outbound_shndx;
5852 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5853 symtab_shndx_hdr->sh_size = amt;
5854 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5855 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5858 /* Now generate the data (for "contents"). */
5860 /* Fill in zeroth symbol and swap it out. */
5861 Elf_Internal_Sym sym;
5867 sym.st_shndx = SHN_UNDEF;
5868 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5869 outbound_syms += bed->s->sizeof_sym;
5870 if (outbound_shndx != NULL)
5871 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5875 = (bed->elf_backend_name_local_section_symbols
5876 && bed->elf_backend_name_local_section_symbols (abfd));
5878 syms = bfd_get_outsymbols (abfd);
5879 for (idx = 0; idx < symcount; idx++)
5881 Elf_Internal_Sym sym;
5882 bfd_vma value = syms[idx]->value;
5883 elf_symbol_type *type_ptr;
5884 flagword flags = syms[idx]->flags;
5887 if (!name_local_sections
5888 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5890 /* Local section symbols have no name. */
5895 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5898 if (sym.st_name == (unsigned long) -1)
5900 _bfd_stringtab_free (stt);
5905 type_ptr = elf_symbol_from (abfd, syms[idx]);
5907 if ((flags & BSF_SECTION_SYM) == 0
5908 && bfd_is_com_section (syms[idx]->section))
5910 /* ELF common symbols put the alignment into the `value' field,
5911 and the size into the `size' field. This is backwards from
5912 how BFD handles it, so reverse it here. */
5913 sym.st_size = value;
5914 if (type_ptr == NULL
5915 || type_ptr->internal_elf_sym.st_value == 0)
5916 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5918 sym.st_value = type_ptr->internal_elf_sym.st_value;
5919 sym.st_shndx = _bfd_elf_section_from_bfd_section
5920 (abfd, syms[idx]->section);
5924 asection *sec = syms[idx]->section;
5927 if (sec->output_section)
5929 value += sec->output_offset;
5930 sec = sec->output_section;
5933 /* Don't add in the section vma for relocatable output. */
5934 if (! relocatable_p)
5936 sym.st_value = value;
5937 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5939 if (bfd_is_abs_section (sec)
5941 && type_ptr->internal_elf_sym.st_shndx != 0)
5943 /* This symbol is in a real ELF section which we did
5944 not create as a BFD section. Undo the mapping done
5945 by copy_private_symbol_data. */
5946 shndx = type_ptr->internal_elf_sym.st_shndx;
5950 shndx = elf_onesymtab (abfd);
5953 shndx = elf_dynsymtab (abfd);
5956 shndx = elf_tdata (abfd)->strtab_section;
5959 shndx = elf_tdata (abfd)->shstrtab_section;
5962 shndx = elf_tdata (abfd)->symtab_shndx_section;
5970 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5976 /* Writing this would be a hell of a lot easier if
5977 we had some decent documentation on bfd, and
5978 knew what to expect of the library, and what to
5979 demand of applications. For example, it
5980 appears that `objcopy' might not set the
5981 section of a symbol to be a section that is
5982 actually in the output file. */
5983 sec2 = bfd_get_section_by_name (abfd, sec->name);
5986 _bfd_error_handler (_("\
5987 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5988 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5990 bfd_set_error (bfd_error_invalid_operation);
5991 _bfd_stringtab_free (stt);
5995 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5996 BFD_ASSERT (shndx != -1);
6000 sym.st_shndx = shndx;
6003 if ((flags & BSF_THREAD_LOCAL) != 0)
6005 else if ((flags & BSF_FUNCTION) != 0)
6007 else if ((flags & BSF_OBJECT) != 0)
6012 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6015 /* Processor-specific types. */
6016 if (type_ptr != NULL
6017 && bed->elf_backend_get_symbol_type)
6018 type = ((*bed->elf_backend_get_symbol_type)
6019 (&type_ptr->internal_elf_sym, type));
6021 if (flags & BSF_SECTION_SYM)
6023 if (flags & BSF_GLOBAL)
6024 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6026 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6028 else if (bfd_is_com_section (syms[idx]->section))
6029 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6030 else if (bfd_is_und_section (syms[idx]->section))
6031 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6035 else if (flags & BSF_FILE)
6036 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6039 int bind = STB_LOCAL;
6041 if (flags & BSF_LOCAL)
6043 else if (flags & BSF_WEAK)
6045 else if (flags & BSF_GLOBAL)
6048 sym.st_info = ELF_ST_INFO (bind, type);
6051 if (type_ptr != NULL)
6052 sym.st_other = type_ptr->internal_elf_sym.st_other;
6056 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6057 outbound_syms += bed->s->sizeof_sym;
6058 if (outbound_shndx != NULL)
6059 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6063 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6064 symstrtab_hdr->sh_type = SHT_STRTAB;
6066 symstrtab_hdr->sh_flags = 0;
6067 symstrtab_hdr->sh_addr = 0;
6068 symstrtab_hdr->sh_entsize = 0;
6069 symstrtab_hdr->sh_link = 0;
6070 symstrtab_hdr->sh_info = 0;
6071 symstrtab_hdr->sh_addralign = 1;
6076 /* Return the number of bytes required to hold the symtab vector.
6078 Note that we base it on the count plus 1, since we will null terminate
6079 the vector allocated based on this size. However, the ELF symbol table
6080 always has a dummy entry as symbol #0, so it ends up even. */
6083 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6087 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6089 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6090 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6092 symtab_size -= sizeof (asymbol *);
6098 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6102 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6104 if (elf_dynsymtab (abfd) == 0)
6106 bfd_set_error (bfd_error_invalid_operation);
6110 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6111 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6113 symtab_size -= sizeof (asymbol *);
6119 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6122 return (asect->reloc_count + 1) * sizeof (arelent *);
6125 /* Canonicalize the relocs. */
6128 _bfd_elf_canonicalize_reloc (bfd *abfd,
6135 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6137 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6140 tblptr = section->relocation;
6141 for (i = 0; i < section->reloc_count; i++)
6142 *relptr++ = tblptr++;
6146 return section->reloc_count;
6150 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6152 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6153 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6156 bfd_get_symcount (abfd) = symcount;
6161 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6162 asymbol **allocation)
6164 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6165 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6168 bfd_get_dynamic_symcount (abfd) = symcount;
6172 /* Return the size required for the dynamic reloc entries. Any loadable
6173 section that was actually installed in the BFD, and has type SHT_REL
6174 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6175 dynamic reloc section. */
6178 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6183 if (elf_dynsymtab (abfd) == 0)
6185 bfd_set_error (bfd_error_invalid_operation);
6189 ret = sizeof (arelent *);
6190 for (s = abfd->sections; s != NULL; s = s->next)
6191 if ((s->flags & SEC_LOAD) != 0
6192 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6193 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6194 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6195 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6196 * sizeof (arelent *));
6201 /* Canonicalize the dynamic relocation entries. Note that we return the
6202 dynamic relocations as a single block, although they are actually
6203 associated with particular sections; the interface, which was
6204 designed for SunOS style shared libraries, expects that there is only
6205 one set of dynamic relocs. Any loadable section that was actually
6206 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6207 dynamic symbol table, is considered to be a dynamic reloc section. */
6210 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6214 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6218 if (elf_dynsymtab (abfd) == 0)
6220 bfd_set_error (bfd_error_invalid_operation);
6224 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6226 for (s = abfd->sections; s != NULL; s = s->next)
6228 if ((s->flags & SEC_LOAD) != 0
6229 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6230 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6231 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6236 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6238 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6240 for (i = 0; i < count; i++)
6251 /* Read in the version information. */
6254 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6256 bfd_byte *contents = NULL;
6257 unsigned int freeidx = 0;
6259 if (elf_dynverref (abfd) != 0)
6261 Elf_Internal_Shdr *hdr;
6262 Elf_External_Verneed *everneed;
6263 Elf_Internal_Verneed *iverneed;
6265 bfd_byte *contents_end;
6267 hdr = &elf_tdata (abfd)->dynverref_hdr;
6269 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6270 sizeof (Elf_Internal_Verneed));
6271 if (elf_tdata (abfd)->verref == NULL)
6274 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6276 contents = bfd_malloc (hdr->sh_size);
6277 if (contents == NULL)
6279 error_return_verref:
6280 elf_tdata (abfd)->verref = NULL;
6281 elf_tdata (abfd)->cverrefs = 0;
6284 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6285 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6286 goto error_return_verref;
6288 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6289 goto error_return_verref;
6291 BFD_ASSERT (sizeof (Elf_External_Verneed)
6292 == sizeof (Elf_External_Vernaux));
6293 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6294 everneed = (Elf_External_Verneed *) contents;
6295 iverneed = elf_tdata (abfd)->verref;
6296 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6298 Elf_External_Vernaux *evernaux;
6299 Elf_Internal_Vernaux *ivernaux;
6302 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6304 iverneed->vn_bfd = abfd;
6306 iverneed->vn_filename =
6307 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6309 if (iverneed->vn_filename == NULL)
6310 goto error_return_verref;
6312 if (iverneed->vn_cnt == 0)
6313 iverneed->vn_auxptr = NULL;
6316 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6317 sizeof (Elf_Internal_Vernaux));
6318 if (iverneed->vn_auxptr == NULL)
6319 goto error_return_verref;
6322 if (iverneed->vn_aux
6323 > (size_t) (contents_end - (bfd_byte *) everneed))
6324 goto error_return_verref;
6326 evernaux = ((Elf_External_Vernaux *)
6327 ((bfd_byte *) everneed + iverneed->vn_aux));
6328 ivernaux = iverneed->vn_auxptr;
6329 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6331 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6333 ivernaux->vna_nodename =
6334 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6335 ivernaux->vna_name);
6336 if (ivernaux->vna_nodename == NULL)
6337 goto error_return_verref;
6339 if (j + 1 < iverneed->vn_cnt)
6340 ivernaux->vna_nextptr = ivernaux + 1;
6342 ivernaux->vna_nextptr = NULL;
6344 if (ivernaux->vna_next
6345 > (size_t) (contents_end - (bfd_byte *) evernaux))
6346 goto error_return_verref;
6348 evernaux = ((Elf_External_Vernaux *)
6349 ((bfd_byte *) evernaux + ivernaux->vna_next));
6351 if (ivernaux->vna_other > freeidx)
6352 freeidx = ivernaux->vna_other;
6355 if (i + 1 < hdr->sh_info)
6356 iverneed->vn_nextref = iverneed + 1;
6358 iverneed->vn_nextref = NULL;
6360 if (iverneed->vn_next
6361 > (size_t) (contents_end - (bfd_byte *) everneed))
6362 goto error_return_verref;
6364 everneed = ((Elf_External_Verneed *)
6365 ((bfd_byte *) everneed + iverneed->vn_next));
6372 if (elf_dynverdef (abfd) != 0)
6374 Elf_Internal_Shdr *hdr;
6375 Elf_External_Verdef *everdef;
6376 Elf_Internal_Verdef *iverdef;
6377 Elf_Internal_Verdef *iverdefarr;
6378 Elf_Internal_Verdef iverdefmem;
6380 unsigned int maxidx;
6381 bfd_byte *contents_end_def, *contents_end_aux;
6383 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6385 contents = bfd_malloc (hdr->sh_size);
6386 if (contents == NULL)
6388 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6389 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6392 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6395 BFD_ASSERT (sizeof (Elf_External_Verdef)
6396 >= sizeof (Elf_External_Verdaux));
6397 contents_end_def = contents + hdr->sh_size
6398 - sizeof (Elf_External_Verdef);
6399 contents_end_aux = contents + hdr->sh_size
6400 - sizeof (Elf_External_Verdaux);
6402 /* We know the number of entries in the section but not the maximum
6403 index. Therefore we have to run through all entries and find
6405 everdef = (Elf_External_Verdef *) contents;
6407 for (i = 0; i < hdr->sh_info; ++i)
6409 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6411 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6412 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6414 if (iverdefmem.vd_next
6415 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6418 everdef = ((Elf_External_Verdef *)
6419 ((bfd_byte *) everdef + iverdefmem.vd_next));
6422 if (default_imported_symver)
6424 if (freeidx > maxidx)
6429 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6430 sizeof (Elf_Internal_Verdef));
6431 if (elf_tdata (abfd)->verdef == NULL)
6434 elf_tdata (abfd)->cverdefs = maxidx;
6436 everdef = (Elf_External_Verdef *) contents;
6437 iverdefarr = elf_tdata (abfd)->verdef;
6438 for (i = 0; i < hdr->sh_info; i++)
6440 Elf_External_Verdaux *everdaux;
6441 Elf_Internal_Verdaux *iverdaux;
6444 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6446 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6448 error_return_verdef:
6449 elf_tdata (abfd)->verdef = NULL;
6450 elf_tdata (abfd)->cverdefs = 0;
6454 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6455 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6457 iverdef->vd_bfd = abfd;
6459 if (iverdef->vd_cnt == 0)
6460 iverdef->vd_auxptr = NULL;
6463 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6464 sizeof (Elf_Internal_Verdaux));
6465 if (iverdef->vd_auxptr == NULL)
6466 goto error_return_verdef;
6470 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6471 goto error_return_verdef;
6473 everdaux = ((Elf_External_Verdaux *)
6474 ((bfd_byte *) everdef + iverdef->vd_aux));
6475 iverdaux = iverdef->vd_auxptr;
6476 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6478 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6480 iverdaux->vda_nodename =
6481 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6482 iverdaux->vda_name);
6483 if (iverdaux->vda_nodename == NULL)
6484 goto error_return_verdef;
6486 if (j + 1 < iverdef->vd_cnt)
6487 iverdaux->vda_nextptr = iverdaux + 1;
6489 iverdaux->vda_nextptr = NULL;
6491 if (iverdaux->vda_next
6492 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6493 goto error_return_verdef;
6495 everdaux = ((Elf_External_Verdaux *)
6496 ((bfd_byte *) everdaux + iverdaux->vda_next));
6499 if (iverdef->vd_cnt)
6500 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6502 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6503 iverdef->vd_nextdef = iverdef + 1;
6505 iverdef->vd_nextdef = NULL;
6507 everdef = ((Elf_External_Verdef *)
6508 ((bfd_byte *) everdef + iverdef->vd_next));
6514 else if (default_imported_symver)
6521 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6522 sizeof (Elf_Internal_Verdef));
6523 if (elf_tdata (abfd)->verdef == NULL)
6526 elf_tdata (abfd)->cverdefs = freeidx;
6529 /* Create a default version based on the soname. */
6530 if (default_imported_symver)
6532 Elf_Internal_Verdef *iverdef;
6533 Elf_Internal_Verdaux *iverdaux;
6535 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6537 iverdef->vd_version = VER_DEF_CURRENT;
6538 iverdef->vd_flags = 0;
6539 iverdef->vd_ndx = freeidx;
6540 iverdef->vd_cnt = 1;
6542 iverdef->vd_bfd = abfd;
6544 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6545 if (iverdef->vd_nodename == NULL)
6546 goto error_return_verdef;
6547 iverdef->vd_nextdef = NULL;
6548 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6549 if (iverdef->vd_auxptr == NULL)
6550 goto error_return_verdef;
6552 iverdaux = iverdef->vd_auxptr;
6553 iverdaux->vda_nodename = iverdef->vd_nodename;
6554 iverdaux->vda_nextptr = NULL;
6560 if (contents != NULL)
6566 _bfd_elf_make_empty_symbol (bfd *abfd)
6568 elf_symbol_type *newsym;
6569 bfd_size_type amt = sizeof (elf_symbol_type);
6571 newsym = bfd_zalloc (abfd, amt);
6576 newsym->symbol.the_bfd = abfd;
6577 return &newsym->symbol;
6582 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6586 bfd_symbol_info (symbol, ret);
6589 /* Return whether a symbol name implies a local symbol. Most targets
6590 use this function for the is_local_label_name entry point, but some
6594 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6597 /* Normal local symbols start with ``.L''. */
6598 if (name[0] == '.' && name[1] == 'L')
6601 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6602 DWARF debugging symbols starting with ``..''. */
6603 if (name[0] == '.' && name[1] == '.')
6606 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6607 emitting DWARF debugging output. I suspect this is actually a
6608 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6609 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6610 underscore to be emitted on some ELF targets). For ease of use,
6611 we treat such symbols as local. */
6612 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6619 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6620 asymbol *symbol ATTRIBUTE_UNUSED)
6627 _bfd_elf_set_arch_mach (bfd *abfd,
6628 enum bfd_architecture arch,
6629 unsigned long machine)
6631 /* If this isn't the right architecture for this backend, and this
6632 isn't the generic backend, fail. */
6633 if (arch != get_elf_backend_data (abfd)->arch
6634 && arch != bfd_arch_unknown
6635 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6638 return bfd_default_set_arch_mach (abfd, arch, machine);
6641 /* Find the function to a particular section and offset,
6642 for error reporting. */
6645 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6649 const char **filename_ptr,
6650 const char **functionname_ptr)
6652 const char *filename;
6653 asymbol *func, *file;
6656 /* ??? Given multiple file symbols, it is impossible to reliably
6657 choose the right file name for global symbols. File symbols are
6658 local symbols, and thus all file symbols must sort before any
6659 global symbols. The ELF spec may be interpreted to say that a
6660 file symbol must sort before other local symbols, but currently
6661 ld -r doesn't do this. So, for ld -r output, it is possible to
6662 make a better choice of file name for local symbols by ignoring
6663 file symbols appearing after a given local symbol. */
6664 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6670 state = nothing_seen;
6672 for (p = symbols; *p != NULL; p++)
6676 q = (elf_symbol_type *) *p;
6678 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6684 if (state == symbol_seen)
6685 state = file_after_symbol_seen;
6691 if (bfd_get_section (&q->symbol) == section
6692 && q->symbol.value >= low_func
6693 && q->symbol.value <= offset)
6695 func = (asymbol *) q;
6696 low_func = q->symbol.value;
6699 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6700 && state == file_after_symbol_seen)
6703 filename = bfd_asymbol_name (file);
6707 if (state == nothing_seen)
6708 state = symbol_seen;
6715 *filename_ptr = filename;
6716 if (functionname_ptr)
6717 *functionname_ptr = bfd_asymbol_name (func);
6722 /* Find the nearest line to a particular section and offset,
6723 for error reporting. */
6726 _bfd_elf_find_nearest_line (bfd *abfd,
6730 const char **filename_ptr,
6731 const char **functionname_ptr,
6732 unsigned int *line_ptr)
6736 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6737 filename_ptr, functionname_ptr,
6740 if (!*functionname_ptr)
6741 elf_find_function (abfd, section, symbols, offset,
6742 *filename_ptr ? NULL : filename_ptr,
6748 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6749 filename_ptr, functionname_ptr,
6751 &elf_tdata (abfd)->dwarf2_find_line_info))
6753 if (!*functionname_ptr)
6754 elf_find_function (abfd, section, symbols, offset,
6755 *filename_ptr ? NULL : filename_ptr,
6761 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6762 &found, filename_ptr,
6763 functionname_ptr, line_ptr,
6764 &elf_tdata (abfd)->line_info))
6766 if (found && (*functionname_ptr || *line_ptr))
6769 if (symbols == NULL)
6772 if (! elf_find_function (abfd, section, symbols, offset,
6773 filename_ptr, functionname_ptr))
6780 /* Find the line for a symbol. */
6783 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
6784 const char **filename_ptr, unsigned int *line_ptr)
6786 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
6787 filename_ptr, line_ptr, 0,
6788 &elf_tdata (abfd)->dwarf2_find_line_info);
6791 /* After a call to bfd_find_nearest_line, successive calls to
6792 bfd_find_inliner_info can be used to get source information about
6793 each level of function inlining that terminated at the address
6794 passed to bfd_find_nearest_line. Currently this is only supported
6795 for DWARF2 with appropriate DWARF3 extensions. */
6798 _bfd_elf_find_inliner_info (bfd *abfd,
6799 const char **filename_ptr,
6800 const char **functionname_ptr,
6801 unsigned int *line_ptr)
6804 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6805 functionname_ptr, line_ptr,
6806 & elf_tdata (abfd)->dwarf2_find_line_info);
6811 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6815 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6817 ret += get_program_header_size (abfd);
6822 _bfd_elf_set_section_contents (bfd *abfd,
6824 const void *location,
6826 bfd_size_type count)
6828 Elf_Internal_Shdr *hdr;
6831 if (! abfd->output_has_begun
6832 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6835 hdr = &elf_section_data (section)->this_hdr;
6836 pos = hdr->sh_offset + offset;
6837 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6838 || bfd_bwrite (location, count, abfd) != count)
6845 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6846 arelent *cache_ptr ATTRIBUTE_UNUSED,
6847 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6852 /* Try to convert a non-ELF reloc into an ELF one. */
6855 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6857 /* Check whether we really have an ELF howto. */
6859 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6861 bfd_reloc_code_real_type code;
6862 reloc_howto_type *howto;
6864 /* Alien reloc: Try to determine its type to replace it with an
6865 equivalent ELF reloc. */
6867 if (areloc->howto->pc_relative)
6869 switch (areloc->howto->bitsize)
6872 code = BFD_RELOC_8_PCREL;
6875 code = BFD_RELOC_12_PCREL;
6878 code = BFD_RELOC_16_PCREL;
6881 code = BFD_RELOC_24_PCREL;
6884 code = BFD_RELOC_32_PCREL;
6887 code = BFD_RELOC_64_PCREL;
6893 howto = bfd_reloc_type_lookup (abfd, code);
6895 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6897 if (howto->pcrel_offset)
6898 areloc->addend += areloc->address;
6900 areloc->addend -= areloc->address; /* addend is unsigned!! */
6905 switch (areloc->howto->bitsize)
6911 code = BFD_RELOC_14;
6914 code = BFD_RELOC_16;
6917 code = BFD_RELOC_26;
6920 code = BFD_RELOC_32;
6923 code = BFD_RELOC_64;
6929 howto = bfd_reloc_type_lookup (abfd, code);
6933 areloc->howto = howto;
6941 (*_bfd_error_handler)
6942 (_("%B: unsupported relocation type %s"),
6943 abfd, areloc->howto->name);
6944 bfd_set_error (bfd_error_bad_value);
6949 _bfd_elf_close_and_cleanup (bfd *abfd)
6951 if (bfd_get_format (abfd) == bfd_object)
6953 if (elf_shstrtab (abfd) != NULL)
6954 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6955 _bfd_dwarf2_cleanup_debug_info (abfd);
6958 return _bfd_generic_close_and_cleanup (abfd);
6961 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6962 in the relocation's offset. Thus we cannot allow any sort of sanity
6963 range-checking to interfere. There is nothing else to do in processing
6966 bfd_reloc_status_type
6967 _bfd_elf_rel_vtable_reloc_fn
6968 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6969 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6970 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6971 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6973 return bfd_reloc_ok;
6976 /* Elf core file support. Much of this only works on native
6977 toolchains, since we rely on knowing the
6978 machine-dependent procfs structure in order to pick
6979 out details about the corefile. */
6981 #ifdef HAVE_SYS_PROCFS_H
6982 # include <sys/procfs.h>
6985 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6988 elfcore_make_pid (bfd *abfd)
6990 return ((elf_tdata (abfd)->core_lwpid << 16)
6991 + (elf_tdata (abfd)->core_pid));
6994 /* If there isn't a section called NAME, make one, using
6995 data from SECT. Note, this function will generate a
6996 reference to NAME, so you shouldn't deallocate or
7000 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7004 if (bfd_get_section_by_name (abfd, name) != NULL)
7007 sect2 = bfd_make_section (abfd, name);
7011 sect2->size = sect->size;
7012 sect2->filepos = sect->filepos;
7013 sect2->flags = sect->flags;
7014 sect2->alignment_power = sect->alignment_power;
7018 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7019 actually creates up to two pseudosections:
7020 - For the single-threaded case, a section named NAME, unless
7021 such a section already exists.
7022 - For the multi-threaded case, a section named "NAME/PID", where
7023 PID is elfcore_make_pid (abfd).
7024 Both pseudosections have identical contents. */
7026 _bfd_elfcore_make_pseudosection (bfd *abfd,
7032 char *threaded_name;
7036 /* Build the section name. */
7038 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7039 len = strlen (buf) + 1;
7040 threaded_name = bfd_alloc (abfd, len);
7041 if (threaded_name == NULL)
7043 memcpy (threaded_name, buf, len);
7045 sect = bfd_make_section_anyway (abfd, threaded_name);
7049 sect->filepos = filepos;
7050 sect->flags = SEC_HAS_CONTENTS;
7051 sect->alignment_power = 2;
7053 return elfcore_maybe_make_sect (abfd, name, sect);
7056 /* prstatus_t exists on:
7058 linux 2.[01] + glibc
7062 #if defined (HAVE_PRSTATUS_T)
7065 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7070 if (note->descsz == sizeof (prstatus_t))
7074 size = sizeof (prstat.pr_reg);
7075 offset = offsetof (prstatus_t, pr_reg);
7076 memcpy (&prstat, note->descdata, sizeof (prstat));
7078 /* Do not overwrite the core signal if it
7079 has already been set by another thread. */
7080 if (elf_tdata (abfd)->core_signal == 0)
7081 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7082 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7084 /* pr_who exists on:
7087 pr_who doesn't exist on:
7090 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7091 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7094 #if defined (HAVE_PRSTATUS32_T)
7095 else if (note->descsz == sizeof (prstatus32_t))
7097 /* 64-bit host, 32-bit corefile */
7098 prstatus32_t prstat;
7100 size = sizeof (prstat.pr_reg);
7101 offset = offsetof (prstatus32_t, pr_reg);
7102 memcpy (&prstat, note->descdata, sizeof (prstat));
7104 /* Do not overwrite the core signal if it
7105 has already been set by another thread. */
7106 if (elf_tdata (abfd)->core_signal == 0)
7107 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7108 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7110 /* pr_who exists on:
7113 pr_who doesn't exist on:
7116 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7117 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7120 #endif /* HAVE_PRSTATUS32_T */
7123 /* Fail - we don't know how to handle any other
7124 note size (ie. data object type). */
7128 /* Make a ".reg/999" section and a ".reg" section. */
7129 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7130 size, note->descpos + offset);
7132 #endif /* defined (HAVE_PRSTATUS_T) */
7134 /* Create a pseudosection containing the exact contents of NOTE. */
7136 elfcore_make_note_pseudosection (bfd *abfd,
7138 Elf_Internal_Note *note)
7140 return _bfd_elfcore_make_pseudosection (abfd, name,
7141 note->descsz, note->descpos);
7144 /* There isn't a consistent prfpregset_t across platforms,
7145 but it doesn't matter, because we don't have to pick this
7146 data structure apart. */
7149 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7151 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7154 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7155 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7159 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7161 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7164 #if defined (HAVE_PRPSINFO_T)
7165 typedef prpsinfo_t elfcore_psinfo_t;
7166 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7167 typedef prpsinfo32_t elfcore_psinfo32_t;
7171 #if defined (HAVE_PSINFO_T)
7172 typedef psinfo_t elfcore_psinfo_t;
7173 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7174 typedef psinfo32_t elfcore_psinfo32_t;
7178 /* return a malloc'ed copy of a string at START which is at
7179 most MAX bytes long, possibly without a terminating '\0'.
7180 the copy will always have a terminating '\0'. */
7183 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7186 char *end = memchr (start, '\0', max);
7194 dups = bfd_alloc (abfd, len + 1);
7198 memcpy (dups, start, len);
7204 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7206 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7208 if (note->descsz == sizeof (elfcore_psinfo_t))
7210 elfcore_psinfo_t psinfo;
7212 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7214 elf_tdata (abfd)->core_program
7215 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7216 sizeof (psinfo.pr_fname));
7218 elf_tdata (abfd)->core_command
7219 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7220 sizeof (psinfo.pr_psargs));
7222 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7223 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7225 /* 64-bit host, 32-bit corefile */
7226 elfcore_psinfo32_t psinfo;
7228 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7230 elf_tdata (abfd)->core_program
7231 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7232 sizeof (psinfo.pr_fname));
7234 elf_tdata (abfd)->core_command
7235 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7236 sizeof (psinfo.pr_psargs));
7242 /* Fail - we don't know how to handle any other
7243 note size (ie. data object type). */
7247 /* Note that for some reason, a spurious space is tacked
7248 onto the end of the args in some (at least one anyway)
7249 implementations, so strip it off if it exists. */
7252 char *command = elf_tdata (abfd)->core_command;
7253 int n = strlen (command);
7255 if (0 < n && command[n - 1] == ' ')
7256 command[n - 1] = '\0';
7261 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7263 #if defined (HAVE_PSTATUS_T)
7265 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7267 if (note->descsz == sizeof (pstatus_t)
7268 #if defined (HAVE_PXSTATUS_T)
7269 || note->descsz == sizeof (pxstatus_t)
7275 memcpy (&pstat, note->descdata, sizeof (pstat));
7277 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7279 #if defined (HAVE_PSTATUS32_T)
7280 else if (note->descsz == sizeof (pstatus32_t))
7282 /* 64-bit host, 32-bit corefile */
7285 memcpy (&pstat, note->descdata, sizeof (pstat));
7287 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7290 /* Could grab some more details from the "representative"
7291 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7292 NT_LWPSTATUS note, presumably. */
7296 #endif /* defined (HAVE_PSTATUS_T) */
7298 #if defined (HAVE_LWPSTATUS_T)
7300 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7302 lwpstatus_t lwpstat;
7308 if (note->descsz != sizeof (lwpstat)
7309 #if defined (HAVE_LWPXSTATUS_T)
7310 && note->descsz != sizeof (lwpxstatus_t)
7315 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7317 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7318 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7320 /* Make a ".reg/999" section. */
7322 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7323 len = strlen (buf) + 1;
7324 name = bfd_alloc (abfd, len);
7327 memcpy (name, buf, len);
7329 sect = bfd_make_section_anyway (abfd, name);
7333 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7334 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7335 sect->filepos = note->descpos
7336 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7339 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7340 sect->size = sizeof (lwpstat.pr_reg);
7341 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7344 sect->flags = SEC_HAS_CONTENTS;
7345 sect->alignment_power = 2;
7347 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7350 /* Make a ".reg2/999" section */
7352 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7353 len = strlen (buf) + 1;
7354 name = bfd_alloc (abfd, len);
7357 memcpy (name, buf, len);
7359 sect = bfd_make_section_anyway (abfd, name);
7363 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7364 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7365 sect->filepos = note->descpos
7366 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7369 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7370 sect->size = sizeof (lwpstat.pr_fpreg);
7371 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7374 sect->flags = SEC_HAS_CONTENTS;
7375 sect->alignment_power = 2;
7377 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7379 #endif /* defined (HAVE_LWPSTATUS_T) */
7381 #if defined (HAVE_WIN32_PSTATUS_T)
7383 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7389 win32_pstatus_t pstatus;
7391 if (note->descsz < sizeof (pstatus))
7394 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7396 switch (pstatus.data_type)
7398 case NOTE_INFO_PROCESS:
7399 /* FIXME: need to add ->core_command. */
7400 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7401 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7404 case NOTE_INFO_THREAD:
7405 /* Make a ".reg/999" section. */
7406 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7408 len = strlen (buf) + 1;
7409 name = bfd_alloc (abfd, len);
7413 memcpy (name, buf, len);
7415 sect = bfd_make_section_anyway (abfd, name);
7419 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7420 sect->filepos = (note->descpos
7421 + offsetof (struct win32_pstatus,
7422 data.thread_info.thread_context));
7423 sect->flags = SEC_HAS_CONTENTS;
7424 sect->alignment_power = 2;
7426 if (pstatus.data.thread_info.is_active_thread)
7427 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7431 case NOTE_INFO_MODULE:
7432 /* Make a ".module/xxxxxxxx" section. */
7433 sprintf (buf, ".module/%08lx",
7434 (long) pstatus.data.module_info.base_address);
7436 len = strlen (buf) + 1;
7437 name = bfd_alloc (abfd, len);
7441 memcpy (name, buf, len);
7443 sect = bfd_make_section_anyway (abfd, name);
7448 sect->size = note->descsz;
7449 sect->filepos = note->descpos;
7450 sect->flags = SEC_HAS_CONTENTS;
7451 sect->alignment_power = 2;
7460 #endif /* HAVE_WIN32_PSTATUS_T */
7463 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7465 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7473 if (bed->elf_backend_grok_prstatus)
7474 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7476 #if defined (HAVE_PRSTATUS_T)
7477 return elfcore_grok_prstatus (abfd, note);
7482 #if defined (HAVE_PSTATUS_T)
7484 return elfcore_grok_pstatus (abfd, note);
7487 #if defined (HAVE_LWPSTATUS_T)
7489 return elfcore_grok_lwpstatus (abfd, note);
7492 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7493 return elfcore_grok_prfpreg (abfd, note);
7495 #if defined (HAVE_WIN32_PSTATUS_T)
7496 case NT_WIN32PSTATUS:
7497 return elfcore_grok_win32pstatus (abfd, note);
7500 case NT_PRXFPREG: /* Linux SSE extension */
7501 if (note->namesz == 6
7502 && strcmp (note->namedata, "LINUX") == 0)
7503 return elfcore_grok_prxfpreg (abfd, note);
7509 if (bed->elf_backend_grok_psinfo)
7510 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7512 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7513 return elfcore_grok_psinfo (abfd, note);
7520 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7524 sect->size = note->descsz;
7525 sect->filepos = note->descpos;
7526 sect->flags = SEC_HAS_CONTENTS;
7527 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7535 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7539 cp = strchr (note->namedata, '@');
7542 *lwpidp = atoi(cp + 1);
7549 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7552 /* Signal number at offset 0x08. */
7553 elf_tdata (abfd)->core_signal
7554 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7556 /* Process ID at offset 0x50. */
7557 elf_tdata (abfd)->core_pid
7558 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7560 /* Command name at 0x7c (max 32 bytes, including nul). */
7561 elf_tdata (abfd)->core_command
7562 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7564 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7569 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7573 if (elfcore_netbsd_get_lwpid (note, &lwp))
7574 elf_tdata (abfd)->core_lwpid = lwp;
7576 if (note->type == NT_NETBSDCORE_PROCINFO)
7578 /* NetBSD-specific core "procinfo". Note that we expect to
7579 find this note before any of the others, which is fine,
7580 since the kernel writes this note out first when it
7581 creates a core file. */
7583 return elfcore_grok_netbsd_procinfo (abfd, note);
7586 /* As of Jan 2002 there are no other machine-independent notes
7587 defined for NetBSD core files. If the note type is less
7588 than the start of the machine-dependent note types, we don't
7591 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7595 switch (bfd_get_arch (abfd))
7597 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7598 PT_GETFPREGS == mach+2. */
7600 case bfd_arch_alpha:
7601 case bfd_arch_sparc:
7604 case NT_NETBSDCORE_FIRSTMACH+0:
7605 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7607 case NT_NETBSDCORE_FIRSTMACH+2:
7608 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7614 /* On all other arch's, PT_GETREGS == mach+1 and
7615 PT_GETFPREGS == mach+3. */
7620 case NT_NETBSDCORE_FIRSTMACH+1:
7621 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7623 case NT_NETBSDCORE_FIRSTMACH+3:
7624 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7634 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7636 void *ddata = note->descdata;
7643 /* nto_procfs_status 'pid' field is at offset 0. */
7644 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7646 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7647 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7649 /* nto_procfs_status 'flags' field is at offset 8. */
7650 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7652 /* nto_procfs_status 'what' field is at offset 14. */
7653 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7655 elf_tdata (abfd)->core_signal = sig;
7656 elf_tdata (abfd)->core_lwpid = *tid;
7659 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7660 do not come from signals so we make sure we set the current
7661 thread just in case. */
7662 if (flags & 0x00000080)
7663 elf_tdata (abfd)->core_lwpid = *tid;
7665 /* Make a ".qnx_core_status/%d" section. */
7666 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7668 name = bfd_alloc (abfd, strlen (buf) + 1);
7673 sect = bfd_make_section_anyway (abfd, name);
7677 sect->size = note->descsz;
7678 sect->filepos = note->descpos;
7679 sect->flags = SEC_HAS_CONTENTS;
7680 sect->alignment_power = 2;
7682 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7686 elfcore_grok_nto_regs (bfd *abfd,
7687 Elf_Internal_Note *note,
7695 /* Make a "(base)/%d" section. */
7696 sprintf (buf, "%s/%ld", base, (long) tid);
7698 name = bfd_alloc (abfd, strlen (buf) + 1);
7703 sect = bfd_make_section_anyway (abfd, name);
7707 sect->size = note->descsz;
7708 sect->filepos = note->descpos;
7709 sect->flags = SEC_HAS_CONTENTS;
7710 sect->alignment_power = 2;
7712 /* This is the current thread. */
7713 if (elf_tdata (abfd)->core_lwpid == tid)
7714 return elfcore_maybe_make_sect (abfd, base, sect);
7719 #define BFD_QNT_CORE_INFO 7
7720 #define BFD_QNT_CORE_STATUS 8
7721 #define BFD_QNT_CORE_GREG 9
7722 #define BFD_QNT_CORE_FPREG 10
7725 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7727 /* Every GREG section has a STATUS section before it. Store the
7728 tid from the previous call to pass down to the next gregs
7730 static pid_t tid = 1;
7734 case BFD_QNT_CORE_INFO:
7735 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7736 case BFD_QNT_CORE_STATUS:
7737 return elfcore_grok_nto_status (abfd, note, &tid);
7738 case BFD_QNT_CORE_GREG:
7739 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7740 case BFD_QNT_CORE_FPREG:
7741 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7747 /* Function: elfcore_write_note
7754 size of data for note
7757 End of buffer containing note. */
7760 elfcore_write_note (bfd *abfd,
7768 Elf_External_Note *xnp;
7778 const struct elf_backend_data *bed;
7780 namesz = strlen (name) + 1;
7781 bed = get_elf_backend_data (abfd);
7782 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7785 newspace = 12 + namesz + pad + size;
7787 p = realloc (buf, *bufsiz + newspace);
7789 *bufsiz += newspace;
7790 xnp = (Elf_External_Note *) dest;
7791 H_PUT_32 (abfd, namesz, xnp->namesz);
7792 H_PUT_32 (abfd, size, xnp->descsz);
7793 H_PUT_32 (abfd, type, xnp->type);
7797 memcpy (dest, name, namesz);
7805 memcpy (dest, input, size);
7809 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7811 elfcore_write_prpsinfo (bfd *abfd,
7818 char *note_name = "CORE";
7820 #if defined (HAVE_PSINFO_T)
7822 note_type = NT_PSINFO;
7825 note_type = NT_PRPSINFO;
7828 memset (&data, 0, sizeof (data));
7829 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7830 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7831 return elfcore_write_note (abfd, buf, bufsiz,
7832 note_name, note_type, &data, sizeof (data));
7834 #endif /* PSINFO_T or PRPSINFO_T */
7836 #if defined (HAVE_PRSTATUS_T)
7838 elfcore_write_prstatus (bfd *abfd,
7846 char *note_name = "CORE";
7848 memset (&prstat, 0, sizeof (prstat));
7849 prstat.pr_pid = pid;
7850 prstat.pr_cursig = cursig;
7851 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7852 return elfcore_write_note (abfd, buf, bufsiz,
7853 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7855 #endif /* HAVE_PRSTATUS_T */
7857 #if defined (HAVE_LWPSTATUS_T)
7859 elfcore_write_lwpstatus (bfd *abfd,
7866 lwpstatus_t lwpstat;
7867 char *note_name = "CORE";
7869 memset (&lwpstat, 0, sizeof (lwpstat));
7870 lwpstat.pr_lwpid = pid >> 16;
7871 lwpstat.pr_cursig = cursig;
7872 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7873 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7874 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7876 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7877 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7879 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7880 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7883 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7884 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7886 #endif /* HAVE_LWPSTATUS_T */
7888 #if defined (HAVE_PSTATUS_T)
7890 elfcore_write_pstatus (bfd *abfd,
7898 char *note_name = "CORE";
7900 memset (&pstat, 0, sizeof (pstat));
7901 pstat.pr_pid = pid & 0xffff;
7902 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7903 NT_PSTATUS, &pstat, sizeof (pstat));
7906 #endif /* HAVE_PSTATUS_T */
7909 elfcore_write_prfpreg (bfd *abfd,
7915 char *note_name = "CORE";
7916 return elfcore_write_note (abfd, buf, bufsiz,
7917 note_name, NT_FPREGSET, fpregs, size);
7921 elfcore_write_prxfpreg (bfd *abfd,
7924 const void *xfpregs,
7927 char *note_name = "LINUX";
7928 return elfcore_write_note (abfd, buf, bufsiz,
7929 note_name, NT_PRXFPREG, xfpregs, size);
7933 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7941 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7944 buf = bfd_malloc (size);
7948 if (bfd_bread (buf, size, abfd) != size)
7956 while (p < buf + size)
7958 /* FIXME: bad alignment assumption. */
7959 Elf_External_Note *xnp = (Elf_External_Note *) p;
7960 Elf_Internal_Note in;
7962 in.type = H_GET_32 (abfd, xnp->type);
7964 in.namesz = H_GET_32 (abfd, xnp->namesz);
7965 in.namedata = xnp->name;
7967 in.descsz = H_GET_32 (abfd, xnp->descsz);
7968 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7969 in.descpos = offset + (in.descdata - buf);
7971 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7973 if (! elfcore_grok_netbsd_note (abfd, &in))
7976 else if (strncmp (in.namedata, "QNX", 3) == 0)
7978 if (! elfcore_grok_nto_note (abfd, &in))
7983 if (! elfcore_grok_note (abfd, &in))
7987 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7994 /* Providing external access to the ELF program header table. */
7996 /* Return an upper bound on the number of bytes required to store a
7997 copy of ABFD's program header table entries. Return -1 if an error
7998 occurs; bfd_get_error will return an appropriate code. */
8001 bfd_get_elf_phdr_upper_bound (bfd *abfd)
8003 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8005 bfd_set_error (bfd_error_wrong_format);
8009 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
8012 /* Copy ABFD's program header table entries to *PHDRS. The entries
8013 will be stored as an array of Elf_Internal_Phdr structures, as
8014 defined in include/elf/internal.h. To find out how large the
8015 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8017 Return the number of program header table entries read, or -1 if an
8018 error occurs; bfd_get_error will return an appropriate code. */
8021 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8025 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8027 bfd_set_error (bfd_error_wrong_format);
8031 num_phdrs = elf_elfheader (abfd)->e_phnum;
8032 memcpy (phdrs, elf_tdata (abfd)->phdr,
8033 num_phdrs * sizeof (Elf_Internal_Phdr));
8039 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8042 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8044 i_ehdrp = elf_elfheader (abfd);
8045 if (i_ehdrp == NULL)
8046 sprintf_vma (buf, value);
8049 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8051 #if BFD_HOST_64BIT_LONG
8052 sprintf (buf, "%016lx", value);
8054 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8055 _bfd_int64_low (value));
8059 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8062 sprintf_vma (buf, value);
8067 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8070 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8072 i_ehdrp = elf_elfheader (abfd);
8073 if (i_ehdrp == NULL)
8074 fprintf_vma ((FILE *) stream, value);
8077 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8079 #if BFD_HOST_64BIT_LONG
8080 fprintf ((FILE *) stream, "%016lx", value);
8082 fprintf ((FILE *) stream, "%08lx%08lx",
8083 _bfd_int64_high (value), _bfd_int64_low (value));
8087 fprintf ((FILE *) stream, "%08lx",
8088 (unsigned long) (value & 0xffffffff));
8091 fprintf_vma ((FILE *) stream, value);
8095 enum elf_reloc_type_class
8096 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8098 return reloc_class_normal;
8101 /* For RELA architectures, return the relocation value for a
8102 relocation against a local symbol. */
8105 _bfd_elf_rela_local_sym (bfd *abfd,
8106 Elf_Internal_Sym *sym,
8108 Elf_Internal_Rela *rel)
8110 asection *sec = *psec;
8113 relocation = (sec->output_section->vma
8114 + sec->output_offset
8116 if ((sec->flags & SEC_MERGE)
8117 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8118 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8121 _bfd_merged_section_offset (abfd, psec,
8122 elf_section_data (sec)->sec_info,
8123 sym->st_value + rel->r_addend);
8126 /* If we have changed the section, and our original section is
8127 marked with SEC_EXCLUDE, it means that the original
8128 SEC_MERGE section has been completely subsumed in some
8129 other SEC_MERGE section. In this case, we need to leave
8130 some info around for --emit-relocs. */
8131 if ((sec->flags & SEC_EXCLUDE) != 0)
8132 sec->kept_section = *psec;
8135 rel->r_addend -= relocation;
8136 rel->r_addend += sec->output_section->vma + sec->output_offset;
8142 _bfd_elf_rel_local_sym (bfd *abfd,
8143 Elf_Internal_Sym *sym,
8147 asection *sec = *psec;
8149 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8150 return sym->st_value + addend;
8152 return _bfd_merged_section_offset (abfd, psec,
8153 elf_section_data (sec)->sec_info,
8154 sym->st_value + addend);
8158 _bfd_elf_section_offset (bfd *abfd,
8159 struct bfd_link_info *info,
8163 switch (sec->sec_info_type)
8165 case ELF_INFO_TYPE_STABS:
8166 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8168 case ELF_INFO_TYPE_EH_FRAME:
8169 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8175 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8176 reconstruct an ELF file by reading the segments out of remote memory
8177 based on the ELF file header at EHDR_VMA and the ELF program headers it
8178 points to. If not null, *LOADBASEP is filled in with the difference
8179 between the VMAs from which the segments were read, and the VMAs the
8180 file headers (and hence BFD's idea of each section's VMA) put them at.
8182 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8183 remote memory at target address VMA into the local buffer at MYADDR; it
8184 should return zero on success or an `errno' code on failure. TEMPL must
8185 be a BFD for an ELF target with the word size and byte order found in
8186 the remote memory. */
8189 bfd_elf_bfd_from_remote_memory
8193 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8195 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8196 (templ, ehdr_vma, loadbasep, target_read_memory);
8200 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8201 long symcount ATTRIBUTE_UNUSED,
8202 asymbol **syms ATTRIBUTE_UNUSED,
8207 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8210 const char *relplt_name;
8211 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8215 Elf_Internal_Shdr *hdr;
8221 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8224 if (dynsymcount <= 0)
8227 if (!bed->plt_sym_val)
8230 relplt_name = bed->relplt_name;
8231 if (relplt_name == NULL)
8232 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8233 relplt = bfd_get_section_by_name (abfd, relplt_name);
8237 hdr = &elf_section_data (relplt)->this_hdr;
8238 if (hdr->sh_link != elf_dynsymtab (abfd)
8239 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8242 plt = bfd_get_section_by_name (abfd, ".plt");
8246 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8247 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8250 count = relplt->size / hdr->sh_entsize;
8251 size = count * sizeof (asymbol);
8252 p = relplt->relocation;
8253 for (i = 0; i < count; i++, s++, p++)
8254 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8256 s = *ret = bfd_malloc (size);
8260 names = (char *) (s + count);
8261 p = relplt->relocation;
8263 for (i = 0; i < count; i++, s++, p++)
8268 addr = bed->plt_sym_val (i, plt, p);
8269 if (addr == (bfd_vma) -1)
8272 *s = **p->sym_ptr_ptr;
8273 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8274 we are defining a symbol, ensure one of them is set. */
8275 if ((s->flags & BSF_LOCAL) == 0)
8276 s->flags |= BSF_GLOBAL;
8278 s->value = addr - plt->vma;
8280 len = strlen ((*p->sym_ptr_ptr)->name);
8281 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8283 memcpy (names, "@plt", sizeof ("@plt"));
8284 names += sizeof ("@plt");
8291 /* Sort symbol by binding and section. We want to put definitions
8292 sorted by section at the beginning. */
8295 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8297 const Elf_Internal_Sym *s1;
8298 const Elf_Internal_Sym *s2;
8301 /* Make sure that undefined symbols are at the end. */
8302 s1 = (const Elf_Internal_Sym *) arg1;
8303 if (s1->st_shndx == SHN_UNDEF)
8305 s2 = (const Elf_Internal_Sym *) arg2;
8306 if (s2->st_shndx == SHN_UNDEF)
8309 /* Sorted by section index. */
8310 shndx = s1->st_shndx - s2->st_shndx;
8314 /* Sorted by binding. */
8315 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8320 Elf_Internal_Sym *sym;
8325 elf_sym_name_compare (const void *arg1, const void *arg2)
8327 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8328 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8329 return strcmp (s1->name, s2->name);
8332 /* Check if 2 sections define the same set of local and global
8336 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8339 const struct elf_backend_data *bed1, *bed2;
8340 Elf_Internal_Shdr *hdr1, *hdr2;
8341 bfd_size_type symcount1, symcount2;
8342 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8343 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8344 Elf_Internal_Sym *isymend;
8345 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8346 bfd_size_type count1, count2, i;
8353 /* If both are .gnu.linkonce sections, they have to have the same
8355 if (strncmp (sec1->name, ".gnu.linkonce",
8356 sizeof ".gnu.linkonce" - 1) == 0
8357 && strncmp (sec2->name, ".gnu.linkonce",
8358 sizeof ".gnu.linkonce" - 1) == 0)
8359 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8360 sec2->name + sizeof ".gnu.linkonce") == 0;
8362 /* Both sections have to be in ELF. */
8363 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8364 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8367 if (elf_section_type (sec1) != elf_section_type (sec2))
8370 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8371 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8373 /* If both are members of section groups, they have to have the
8375 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8379 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8380 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8381 if (shndx1 == -1 || shndx2 == -1)
8384 bed1 = get_elf_backend_data (bfd1);
8385 bed2 = get_elf_backend_data (bfd2);
8386 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8387 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8388 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8389 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8391 if (symcount1 == 0 || symcount2 == 0)
8394 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8396 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8400 if (isymbuf1 == NULL || isymbuf2 == NULL)
8403 /* Sort symbols by binding and section. Global definitions are at
8405 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8406 elf_sort_elf_symbol);
8407 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8408 elf_sort_elf_symbol);
8410 /* Count definitions in the section. */
8412 for (isym = isymbuf1, isymend = isym + symcount1;
8413 isym < isymend; isym++)
8415 if (isym->st_shndx == (unsigned int) shndx1)
8422 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8427 for (isym = isymbuf2, isymend = isym + symcount2;
8428 isym < isymend; isym++)
8430 if (isym->st_shndx == (unsigned int) shndx2)
8437 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8441 if (count1 == 0 || count2 == 0 || count1 != count2)
8444 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8445 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8447 if (symtable1 == NULL || symtable2 == NULL)
8451 for (isym = isymstart1, isymend = isym + count1;
8452 isym < isymend; isym++)
8455 symp->name = bfd_elf_string_from_elf_section (bfd1,
8462 for (isym = isymstart2, isymend = isym + count1;
8463 isym < isymend; isym++)
8466 symp->name = bfd_elf_string_from_elf_section (bfd2,
8472 /* Sort symbol by name. */
8473 qsort (symtable1, count1, sizeof (struct elf_symbol),
8474 elf_sym_name_compare);
8475 qsort (symtable2, count1, sizeof (struct elf_symbol),
8476 elf_sym_name_compare);
8478 for (i = 0; i < count1; i++)
8479 /* Two symbols must have the same binding, type and name. */
8480 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8481 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8482 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
8500 /* It is only used by x86-64 so far. */
8501 asection _bfd_elf_large_com_section
8502 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8503 SEC_IS_COMMON, NULL, NULL, "LARGE_COMMON",
8506 /* Return TRUE if 2 section types are compatible. */
8509 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
8510 bfd *bbfd, const asection *bsec)
8514 || abfd->xvec->flavour != bfd_target_elf_flavour
8515 || bbfd->xvec->flavour != bfd_target_elf_flavour)
8518 return elf_section_type (asec) == elf_section_type (bsec);