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 (struct bfd_link_info *info,
1462 struct elf_link_hash_entry *dir,
1463 struct elf_link_hash_entry *ind)
1465 struct elf_link_hash_table *htab;
1467 /* Copy down any references that we may have already seen to the
1468 symbol which just became indirect. */
1470 dir->ref_dynamic |= ind->ref_dynamic;
1471 dir->ref_regular |= ind->ref_regular;
1472 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1473 dir->non_got_ref |= ind->non_got_ref;
1474 dir->needs_plt |= ind->needs_plt;
1475 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1477 if (ind->root.type != bfd_link_hash_indirect)
1480 /* Copy over the global and procedure linkage table refcount entries.
1481 These may have been already set up by a check_relocs routine. */
1482 htab = elf_hash_table (info);
1483 if (ind->got.refcount > htab->init_got_refcount.refcount)
1485 if (dir->got.refcount < 0)
1486 dir->got.refcount = 0;
1487 dir->got.refcount += ind->got.refcount;
1488 ind->got.refcount = htab->init_got_refcount.refcount;
1491 if (ind->plt.refcount > htab->init_plt_refcount.refcount)
1493 if (dir->plt.refcount < 0)
1494 dir->plt.refcount = 0;
1495 dir->plt.refcount += ind->plt.refcount;
1496 ind->plt.refcount = htab->init_plt_refcount.refcount;
1499 if (ind->dynindx != -1)
1501 if (dir->dynindx != -1)
1502 _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index);
1503 dir->dynindx = ind->dynindx;
1504 dir->dynstr_index = ind->dynstr_index;
1506 ind->dynstr_index = 0;
1511 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1512 struct elf_link_hash_entry *h,
1513 bfd_boolean force_local)
1515 h->plt = elf_hash_table (info)->init_plt_offset;
1519 h->forced_local = 1;
1520 if (h->dynindx != -1)
1523 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1529 /* Initialize an ELF linker hash table. */
1532 _bfd_elf_link_hash_table_init
1533 (struct elf_link_hash_table *table,
1535 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1536 struct bfd_hash_table *,
1540 int can_refcount = get_elf_backend_data (abfd)->can_refcount;
1542 table->dynamic_sections_created = FALSE;
1543 table->dynobj = NULL;
1544 table->init_got_refcount.refcount = can_refcount - 1;
1545 table->init_plt_refcount.refcount = can_refcount - 1;
1546 table->init_got_offset.offset = -(bfd_vma) 1;
1547 table->init_plt_offset.offset = -(bfd_vma) 1;
1548 /* The first dynamic symbol is a dummy. */
1549 table->dynsymcount = 1;
1550 table->dynstr = NULL;
1551 table->bucketcount = 0;
1552 table->needed = NULL;
1554 table->merge_info = NULL;
1555 memset (&table->stab_info, 0, sizeof (table->stab_info));
1556 memset (&table->eh_info, 0, sizeof (table->eh_info));
1557 table->dynlocal = NULL;
1558 table->runpath = NULL;
1559 table->tls_sec = NULL;
1560 table->tls_size = 0;
1561 table->loaded = NULL;
1562 table->is_relocatable_executable = FALSE;
1564 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1565 table->root.type = bfd_link_elf_hash_table;
1570 /* Create an ELF linker hash table. */
1572 struct bfd_link_hash_table *
1573 _bfd_elf_link_hash_table_create (bfd *abfd)
1575 struct elf_link_hash_table *ret;
1576 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1578 ret = bfd_malloc (amt);
1582 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1591 /* This is a hook for the ELF emulation code in the generic linker to
1592 tell the backend linker what file name to use for the DT_NEEDED
1593 entry for a dynamic object. */
1596 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1598 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1599 && bfd_get_format (abfd) == bfd_object)
1600 elf_dt_name (abfd) = name;
1604 bfd_elf_get_dyn_lib_class (bfd *abfd)
1607 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1608 && bfd_get_format (abfd) == bfd_object)
1609 lib_class = elf_dyn_lib_class (abfd);
1616 bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
1618 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1619 && bfd_get_format (abfd) == bfd_object)
1620 elf_dyn_lib_class (abfd) = lib_class;
1623 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1624 the linker ELF emulation code. */
1626 struct bfd_link_needed_list *
1627 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1628 struct bfd_link_info *info)
1630 if (! is_elf_hash_table (info->hash))
1632 return elf_hash_table (info)->needed;
1635 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1636 hook for the linker ELF emulation code. */
1638 struct bfd_link_needed_list *
1639 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1640 struct bfd_link_info *info)
1642 if (! is_elf_hash_table (info->hash))
1644 return elf_hash_table (info)->runpath;
1647 /* Get the name actually used for a dynamic object for a link. This
1648 is the SONAME entry if there is one. Otherwise, it is the string
1649 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1652 bfd_elf_get_dt_soname (bfd *abfd)
1654 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1655 && bfd_get_format (abfd) == bfd_object)
1656 return elf_dt_name (abfd);
1660 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1661 the ELF linker emulation code. */
1664 bfd_elf_get_bfd_needed_list (bfd *abfd,
1665 struct bfd_link_needed_list **pneeded)
1668 bfd_byte *dynbuf = NULL;
1670 unsigned long shlink;
1671 bfd_byte *extdyn, *extdynend;
1673 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1677 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1678 || bfd_get_format (abfd) != bfd_object)
1681 s = bfd_get_section_by_name (abfd, ".dynamic");
1682 if (s == NULL || s->size == 0)
1685 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1688 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1692 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1694 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1695 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1698 extdynend = extdyn + s->size;
1699 for (; extdyn < extdynend; extdyn += extdynsize)
1701 Elf_Internal_Dyn dyn;
1703 (*swap_dyn_in) (abfd, extdyn, &dyn);
1705 if (dyn.d_tag == DT_NULL)
1708 if (dyn.d_tag == DT_NEEDED)
1711 struct bfd_link_needed_list *l;
1712 unsigned int tagv = dyn.d_un.d_val;
1715 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1720 l = bfd_alloc (abfd, amt);
1741 /* Allocate an ELF string table--force the first byte to be zero. */
1743 struct bfd_strtab_hash *
1744 _bfd_elf_stringtab_init (void)
1746 struct bfd_strtab_hash *ret;
1748 ret = _bfd_stringtab_init ();
1753 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1754 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1755 if (loc == (bfd_size_type) -1)
1757 _bfd_stringtab_free (ret);
1764 /* ELF .o/exec file reading */
1766 /* Create a new bfd section from an ELF section header. */
1769 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1771 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1772 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1773 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1776 name = bfd_elf_string_from_elf_section (abfd,
1777 elf_elfheader (abfd)->e_shstrndx,
1782 switch (hdr->sh_type)
1785 /* Inactive section. Throw it away. */
1788 case SHT_PROGBITS: /* Normal section with contents. */
1789 case SHT_NOBITS: /* .bss section. */
1790 case SHT_HASH: /* .hash section. */
1791 case SHT_NOTE: /* .note section. */
1792 case SHT_INIT_ARRAY: /* .init_array section. */
1793 case SHT_FINI_ARRAY: /* .fini_array section. */
1794 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1795 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1796 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1798 case SHT_DYNAMIC: /* Dynamic linking information. */
1799 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1801 if (hdr->sh_link > elf_numsections (abfd)
1802 || elf_elfsections (abfd)[hdr->sh_link] == NULL)
1804 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1806 Elf_Internal_Shdr *dynsymhdr;
1808 /* The shared libraries distributed with hpux11 have a bogus
1809 sh_link field for the ".dynamic" section. Find the
1810 string table for the ".dynsym" section instead. */
1811 if (elf_dynsymtab (abfd) != 0)
1813 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1814 hdr->sh_link = dynsymhdr->sh_link;
1818 unsigned int i, num_sec;
1820 num_sec = elf_numsections (abfd);
1821 for (i = 1; i < num_sec; i++)
1823 dynsymhdr = elf_elfsections (abfd)[i];
1824 if (dynsymhdr->sh_type == SHT_DYNSYM)
1826 hdr->sh_link = dynsymhdr->sh_link;
1834 case SHT_SYMTAB: /* A symbol table */
1835 if (elf_onesymtab (abfd) == shindex)
1838 if (hdr->sh_entsize != bed->s->sizeof_sym)
1840 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1841 elf_onesymtab (abfd) = shindex;
1842 elf_tdata (abfd)->symtab_hdr = *hdr;
1843 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1844 abfd->flags |= HAS_SYMS;
1846 /* Sometimes a shared object will map in the symbol table. If
1847 SHF_ALLOC is set, and this is a shared object, then we also
1848 treat this section as a BFD section. We can not base the
1849 decision purely on SHF_ALLOC, because that flag is sometimes
1850 set in a relocatable object file, which would confuse the
1852 if ((hdr->sh_flags & SHF_ALLOC) != 0
1853 && (abfd->flags & DYNAMIC) != 0
1854 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1858 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1859 can't read symbols without that section loaded as well. It
1860 is most likely specified by the next section header. */
1861 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1863 unsigned int i, num_sec;
1865 num_sec = elf_numsections (abfd);
1866 for (i = shindex + 1; i < num_sec; i++)
1868 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1869 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1870 && hdr2->sh_link == shindex)
1874 for (i = 1; i < shindex; i++)
1876 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1877 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1878 && hdr2->sh_link == shindex)
1882 return bfd_section_from_shdr (abfd, i);
1886 case SHT_DYNSYM: /* A dynamic symbol table */
1887 if (elf_dynsymtab (abfd) == shindex)
1890 if (hdr->sh_entsize != bed->s->sizeof_sym)
1892 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1893 elf_dynsymtab (abfd) = shindex;
1894 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1895 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1896 abfd->flags |= HAS_SYMS;
1898 /* Besides being a symbol table, we also treat this as a regular
1899 section, so that objcopy can handle it. */
1900 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1902 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1903 if (elf_symtab_shndx (abfd) == shindex)
1906 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1907 elf_symtab_shndx (abfd) = shindex;
1908 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1909 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1912 case SHT_STRTAB: /* A string table */
1913 if (hdr->bfd_section != NULL)
1915 if (ehdr->e_shstrndx == shindex)
1917 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1918 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1921 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1924 elf_tdata (abfd)->strtab_hdr = *hdr;
1925 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1928 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1931 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1932 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1933 elf_elfsections (abfd)[shindex] = hdr;
1934 /* We also treat this as a regular section, so that objcopy
1936 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1940 /* If the string table isn't one of the above, then treat it as a
1941 regular section. We need to scan all the headers to be sure,
1942 just in case this strtab section appeared before the above. */
1943 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1945 unsigned int i, num_sec;
1947 num_sec = elf_numsections (abfd);
1948 for (i = 1; i < num_sec; i++)
1950 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1951 if (hdr2->sh_link == shindex)
1953 /* Prevent endless recursion on broken objects. */
1956 if (! bfd_section_from_shdr (abfd, i))
1958 if (elf_onesymtab (abfd) == i)
1960 if (elf_dynsymtab (abfd) == i)
1961 goto dynsymtab_strtab;
1965 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1969 /* *These* do a lot of work -- but build no sections! */
1971 asection *target_sect;
1972 Elf_Internal_Shdr *hdr2;
1973 unsigned int num_sec = elf_numsections (abfd);
1976 != (bfd_size_type) (hdr->sh_type == SHT_REL
1977 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1980 /* Check for a bogus link to avoid crashing. */
1981 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1982 || hdr->sh_link >= num_sec)
1984 ((*_bfd_error_handler)
1985 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1986 abfd, hdr->sh_link, name, shindex));
1987 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1991 /* For some incomprehensible reason Oracle distributes
1992 libraries for Solaris in which some of the objects have
1993 bogus sh_link fields. It would be nice if we could just
1994 reject them, but, unfortunately, some people need to use
1995 them. We scan through the section headers; if we find only
1996 one suitable symbol table, we clobber the sh_link to point
1997 to it. I hope this doesn't break anything. */
1998 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1999 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
2005 for (scan = 1; scan < num_sec; scan++)
2007 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
2008 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
2019 hdr->sh_link = found;
2022 /* Get the symbol table. */
2023 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
2024 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
2025 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
2028 /* If this reloc section does not use the main symbol table we
2029 don't treat it as a reloc section. BFD can't adequately
2030 represent such a section, so at least for now, we don't
2031 try. We just present it as a normal section. We also
2032 can't use it as a reloc section if it points to the null
2034 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
2035 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
2038 /* Prevent endless recursion on broken objects. */
2039 if (elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
2040 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
2042 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2044 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2045 if (target_sect == NULL)
2048 if ((target_sect->flags & SEC_RELOC) == 0
2049 || target_sect->reloc_count == 0)
2050 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2054 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2055 amt = sizeof (*hdr2);
2056 hdr2 = bfd_alloc (abfd, amt);
2057 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2060 elf_elfsections (abfd)[shindex] = hdr2;
2061 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2062 target_sect->flags |= SEC_RELOC;
2063 target_sect->relocation = NULL;
2064 target_sect->rel_filepos = hdr->sh_offset;
2065 /* In the section to which the relocations apply, mark whether
2066 its relocations are of the REL or RELA variety. */
2067 if (hdr->sh_size != 0)
2068 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2069 abfd->flags |= HAS_RELOC;
2074 case SHT_GNU_verdef:
2075 elf_dynverdef (abfd) = shindex;
2076 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2077 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2080 case SHT_GNU_versym:
2081 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
2083 elf_dynversym (abfd) = shindex;
2084 elf_tdata (abfd)->dynversym_hdr = *hdr;
2085 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2088 case SHT_GNU_verneed:
2089 elf_dynverref (abfd) = shindex;
2090 elf_tdata (abfd)->dynverref_hdr = *hdr;
2091 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2098 /* We need a BFD section for objcopy and relocatable linking,
2099 and it's handy to have the signature available as the section
2101 if (hdr->sh_entsize != GRP_ENTRY_SIZE)
2103 name = group_signature (abfd, hdr);
2106 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2108 if (hdr->contents != NULL)
2110 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2111 unsigned int n_elt = hdr->sh_size / 4;
2114 if (idx->flags & GRP_COMDAT)
2115 hdr->bfd_section->flags
2116 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2118 /* We try to keep the same section order as it comes in. */
2120 while (--n_elt != 0)
2121 if ((s = (--idx)->shdr->bfd_section) != NULL
2122 && elf_next_in_group (s) != NULL)
2124 elf_next_in_group (hdr->bfd_section) = s;
2131 /* Check for any processor-specific section types. */
2132 return bed->elf_backend_section_from_shdr (abfd, hdr, name,
2139 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2140 Return SEC for sections that have no elf section, and NULL on error. */
2143 bfd_section_from_r_symndx (bfd *abfd,
2144 struct sym_sec_cache *cache,
2146 unsigned long r_symndx)
2148 Elf_Internal_Shdr *symtab_hdr;
2149 unsigned char esym[sizeof (Elf64_External_Sym)];
2150 Elf_External_Sym_Shndx eshndx;
2151 Elf_Internal_Sym isym;
2152 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2154 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2155 return cache->sec[ent];
2157 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2158 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2159 &isym, esym, &eshndx) == NULL)
2162 if (cache->abfd != abfd)
2164 memset (cache->indx, -1, sizeof (cache->indx));
2167 cache->indx[ent] = r_symndx;
2168 cache->sec[ent] = sec;
2169 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2170 || isym.st_shndx > SHN_HIRESERVE)
2173 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2175 cache->sec[ent] = s;
2177 return cache->sec[ent];
2180 /* Given an ELF section number, retrieve the corresponding BFD
2184 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2186 if (index >= elf_numsections (abfd))
2188 return elf_elfsections (abfd)[index]->bfd_section;
2191 static const struct bfd_elf_special_section special_sections_b[] =
2193 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2194 { NULL, 0, 0, 0, 0 }
2197 static const struct bfd_elf_special_section special_sections_c[] =
2199 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2200 { NULL, 0, 0, 0, 0 }
2203 static const struct bfd_elf_special_section special_sections_d[] =
2205 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2206 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2207 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2208 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2209 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2210 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2211 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2212 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2213 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2214 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2215 { NULL, 0, 0, 0, 0 }
2218 static const struct bfd_elf_special_section special_sections_f[] =
2220 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2221 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2222 { NULL, 0, 0, 0, 0 }
2225 static const struct bfd_elf_special_section special_sections_g[] =
2227 { ".gnu.linkonce.b",15, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2228 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2229 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2230 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2231 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2232 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2233 { ".gnu.conflict", 13, 0, SHT_RELA, SHF_ALLOC },
2234 { NULL, 0, 0, 0, 0 }
2237 static const struct bfd_elf_special_section special_sections_h[] =
2239 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2240 { NULL, 0, 0, 0, 0 }
2243 static const struct bfd_elf_special_section special_sections_i[] =
2245 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2246 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2247 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2248 { NULL, 0, 0, 0, 0 }
2251 static const struct bfd_elf_special_section special_sections_l[] =
2253 { ".line", 5, 0, SHT_PROGBITS, 0 },
2254 { NULL, 0, 0, 0, 0 }
2257 static const struct bfd_elf_special_section special_sections_n[] =
2259 { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
2260 { ".note", 5, -1, SHT_NOTE, 0 },
2261 { NULL, 0, 0, 0, 0 }
2264 static const struct bfd_elf_special_section special_sections_p[] =
2266 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2267 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2268 { NULL, 0, 0, 0, 0 }
2271 static const struct bfd_elf_special_section special_sections_r[] =
2273 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2274 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2275 { ".rela", 5, -1, SHT_RELA, 0 },
2276 { ".rel", 4, -1, SHT_REL, 0 },
2277 { NULL, 0, 0, 0, 0 }
2280 static const struct bfd_elf_special_section special_sections_s[] =
2282 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2283 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2284 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2285 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2286 { NULL, 0, 0, 0, 0 }
2289 static const struct bfd_elf_special_section special_sections_t[] =
2291 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2292 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2293 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2294 { NULL, 0, 0, 0, 0 }
2297 static const struct bfd_elf_special_section *special_sections[] =
2299 special_sections_b, /* 'b' */
2300 special_sections_c, /* 'b' */
2301 special_sections_d, /* 'd' */
2303 special_sections_f, /* 'f' */
2304 special_sections_g, /* 'g' */
2305 special_sections_h, /* 'h' */
2306 special_sections_i, /* 'i' */
2309 special_sections_l, /* 'l' */
2311 special_sections_n, /* 'n' */
2313 special_sections_p, /* 'p' */
2315 special_sections_r, /* 'r' */
2316 special_sections_s, /* 's' */
2317 special_sections_t, /* 't' */
2320 const struct bfd_elf_special_section *
2321 _bfd_elf_get_special_section (const char *name,
2322 const struct bfd_elf_special_section *spec,
2328 len = strlen (name);
2330 for (i = 0; spec[i].prefix != NULL; i++)
2333 int prefix_len = spec[i].prefix_length;
2335 if (len < prefix_len)
2337 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2340 suffix_len = spec[i].suffix_length;
2341 if (suffix_len <= 0)
2343 if (name[prefix_len] != 0)
2345 if (suffix_len == 0)
2347 if (name[prefix_len] != '.'
2348 && (suffix_len == -2
2349 || (rela && spec[i].type == SHT_REL)))
2355 if (len < prefix_len + suffix_len)
2357 if (memcmp (name + len - suffix_len,
2358 spec[i].prefix + prefix_len,
2368 const struct bfd_elf_special_section *
2369 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2372 const struct bfd_elf_special_section *spec;
2373 const struct elf_backend_data *bed;
2375 /* See if this is one of the special sections. */
2376 if (sec->name == NULL)
2379 bed = get_elf_backend_data (abfd);
2380 spec = bed->special_sections;
2383 spec = _bfd_elf_get_special_section (sec->name,
2384 bed->special_sections,
2390 if (sec->name[0] != '.')
2393 i = sec->name[1] - 'b';
2394 if (i < 0 || i > 't' - 'b')
2397 spec = special_sections[i];
2402 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2406 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2408 struct bfd_elf_section_data *sdata;
2409 const struct elf_backend_data *bed;
2410 const struct bfd_elf_special_section *ssect;
2412 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2415 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2418 sec->used_by_bfd = sdata;
2421 /* Indicate whether or not this section should use RELA relocations. */
2422 bed = get_elf_backend_data (abfd);
2423 sec->use_rela_p = bed->default_use_rela_p;
2425 /* When we read a file, we don't need section type and flags unless
2426 it is a linker created section. They will be overridden in
2427 _bfd_elf_make_section_from_shdr anyway. */
2428 if (abfd->direction != read_direction
2429 || (sec->flags & SEC_LINKER_CREATED) != 0)
2431 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2434 elf_section_type (sec) = ssect->type;
2435 elf_section_flags (sec) = ssect->attr;
2442 /* Create a new bfd section from an ELF program header.
2444 Since program segments have no names, we generate a synthetic name
2445 of the form segment<NUM>, where NUM is generally the index in the
2446 program header table. For segments that are split (see below) we
2447 generate the names segment<NUM>a and segment<NUM>b.
2449 Note that some program segments may have a file size that is different than
2450 (less than) the memory size. All this means is that at execution the
2451 system must allocate the amount of memory specified by the memory size,
2452 but only initialize it with the first "file size" bytes read from the
2453 file. This would occur for example, with program segments consisting
2454 of combined data+bss.
2456 To handle the above situation, this routine generates TWO bfd sections
2457 for the single program segment. The first has the length specified by
2458 the file size of the segment, and the second has the length specified
2459 by the difference between the two sizes. In effect, the segment is split
2460 into it's initialized and uninitialized parts.
2465 _bfd_elf_make_section_from_phdr (bfd *abfd,
2466 Elf_Internal_Phdr *hdr,
2468 const char *typename)
2476 split = ((hdr->p_memsz > 0)
2477 && (hdr->p_filesz > 0)
2478 && (hdr->p_memsz > hdr->p_filesz));
2479 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2480 len = strlen (namebuf) + 1;
2481 name = bfd_alloc (abfd, len);
2484 memcpy (name, namebuf, len);
2485 newsect = bfd_make_section (abfd, name);
2486 if (newsect == NULL)
2488 newsect->vma = hdr->p_vaddr;
2489 newsect->lma = hdr->p_paddr;
2490 newsect->size = hdr->p_filesz;
2491 newsect->filepos = hdr->p_offset;
2492 newsect->flags |= SEC_HAS_CONTENTS;
2493 newsect->alignment_power = bfd_log2 (hdr->p_align);
2494 if (hdr->p_type == PT_LOAD)
2496 newsect->flags |= SEC_ALLOC;
2497 newsect->flags |= SEC_LOAD;
2498 if (hdr->p_flags & PF_X)
2500 /* FIXME: all we known is that it has execute PERMISSION,
2502 newsect->flags |= SEC_CODE;
2505 if (!(hdr->p_flags & PF_W))
2507 newsect->flags |= SEC_READONLY;
2512 sprintf (namebuf, "%s%db", typename, index);
2513 len = strlen (namebuf) + 1;
2514 name = bfd_alloc (abfd, len);
2517 memcpy (name, namebuf, len);
2518 newsect = bfd_make_section (abfd, name);
2519 if (newsect == NULL)
2521 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2522 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2523 newsect->size = hdr->p_memsz - hdr->p_filesz;
2524 if (hdr->p_type == PT_LOAD)
2526 newsect->flags |= SEC_ALLOC;
2527 if (hdr->p_flags & PF_X)
2528 newsect->flags |= SEC_CODE;
2530 if (!(hdr->p_flags & PF_W))
2531 newsect->flags |= SEC_READONLY;
2538 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2540 const struct elf_backend_data *bed;
2542 switch (hdr->p_type)
2545 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2548 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2551 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2554 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2557 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2559 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2564 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2567 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2569 case PT_GNU_EH_FRAME:
2570 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2574 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2577 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
2580 /* Check for any processor-specific program segment types. */
2581 bed = get_elf_backend_data (abfd);
2582 return bed->elf_backend_section_from_phdr (abfd, hdr, index, "proc");
2586 /* Initialize REL_HDR, the section-header for new section, containing
2587 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2588 relocations; otherwise, we use REL relocations. */
2591 _bfd_elf_init_reloc_shdr (bfd *abfd,
2592 Elf_Internal_Shdr *rel_hdr,
2594 bfd_boolean use_rela_p)
2597 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2598 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2600 name = bfd_alloc (abfd, amt);
2603 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2605 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2607 if (rel_hdr->sh_name == (unsigned int) -1)
2609 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2610 rel_hdr->sh_entsize = (use_rela_p
2611 ? bed->s->sizeof_rela
2612 : bed->s->sizeof_rel);
2613 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2614 rel_hdr->sh_flags = 0;
2615 rel_hdr->sh_addr = 0;
2616 rel_hdr->sh_size = 0;
2617 rel_hdr->sh_offset = 0;
2622 /* Set up an ELF internal section header for a section. */
2625 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2627 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2628 bfd_boolean *failedptr = failedptrarg;
2629 Elf_Internal_Shdr *this_hdr;
2633 /* We already failed; just get out of the bfd_map_over_sections
2638 this_hdr = &elf_section_data (asect)->this_hdr;
2640 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2641 asect->name, FALSE);
2642 if (this_hdr->sh_name == (unsigned int) -1)
2648 /* Don't clear sh_flags. Assembler may set additional bits. */
2650 if ((asect->flags & SEC_ALLOC) != 0
2651 || asect->user_set_vma)
2652 this_hdr->sh_addr = asect->vma;
2654 this_hdr->sh_addr = 0;
2656 this_hdr->sh_offset = 0;
2657 this_hdr->sh_size = asect->size;
2658 this_hdr->sh_link = 0;
2659 this_hdr->sh_addralign = 1 << asect->alignment_power;
2660 /* The sh_entsize and sh_info fields may have been set already by
2661 copy_private_section_data. */
2663 this_hdr->bfd_section = asect;
2664 this_hdr->contents = NULL;
2666 /* If the section type is unspecified, we set it based on
2668 if (this_hdr->sh_type == SHT_NULL)
2670 if ((asect->flags & SEC_GROUP) != 0)
2671 this_hdr->sh_type = SHT_GROUP;
2672 else if ((asect->flags & SEC_ALLOC) != 0
2673 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2674 || (asect->flags & SEC_NEVER_LOAD) != 0))
2675 this_hdr->sh_type = SHT_NOBITS;
2677 this_hdr->sh_type = SHT_PROGBITS;
2680 switch (this_hdr->sh_type)
2686 case SHT_INIT_ARRAY:
2687 case SHT_FINI_ARRAY:
2688 case SHT_PREINIT_ARRAY:
2695 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2699 this_hdr->sh_entsize = bed->s->sizeof_sym;
2703 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2707 if (get_elf_backend_data (abfd)->may_use_rela_p)
2708 this_hdr->sh_entsize = bed->s->sizeof_rela;
2712 if (get_elf_backend_data (abfd)->may_use_rel_p)
2713 this_hdr->sh_entsize = bed->s->sizeof_rel;
2716 case SHT_GNU_versym:
2717 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2720 case SHT_GNU_verdef:
2721 this_hdr->sh_entsize = 0;
2722 /* objcopy or strip will copy over sh_info, but may not set
2723 cverdefs. The linker will set cverdefs, but sh_info will be
2725 if (this_hdr->sh_info == 0)
2726 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2728 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2729 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2732 case SHT_GNU_verneed:
2733 this_hdr->sh_entsize = 0;
2734 /* objcopy or strip will copy over sh_info, but may not set
2735 cverrefs. The linker will set cverrefs, but sh_info will be
2737 if (this_hdr->sh_info == 0)
2738 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2740 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2741 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2745 this_hdr->sh_entsize = 4;
2749 if ((asect->flags & SEC_ALLOC) != 0)
2750 this_hdr->sh_flags |= SHF_ALLOC;
2751 if ((asect->flags & SEC_READONLY) == 0)
2752 this_hdr->sh_flags |= SHF_WRITE;
2753 if ((asect->flags & SEC_CODE) != 0)
2754 this_hdr->sh_flags |= SHF_EXECINSTR;
2755 if ((asect->flags & SEC_MERGE) != 0)
2757 this_hdr->sh_flags |= SHF_MERGE;
2758 this_hdr->sh_entsize = asect->entsize;
2759 if ((asect->flags & SEC_STRINGS) != 0)
2760 this_hdr->sh_flags |= SHF_STRINGS;
2762 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2763 this_hdr->sh_flags |= SHF_GROUP;
2764 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2766 this_hdr->sh_flags |= SHF_TLS;
2767 if (asect->size == 0
2768 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2770 struct bfd_link_order *o = asect->map_tail.link_order;
2772 this_hdr->sh_size = 0;
2775 this_hdr->sh_size = o->offset + o->size;
2776 if (this_hdr->sh_size != 0)
2777 this_hdr->sh_type = SHT_NOBITS;
2782 /* Check for processor-specific section types. */
2783 if (bed->elf_backend_fake_sections
2784 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2787 /* If the section has relocs, set up a section header for the
2788 SHT_REL[A] section. If two relocation sections are required for
2789 this section, it is up to the processor-specific back-end to
2790 create the other. */
2791 if ((asect->flags & SEC_RELOC) != 0
2792 && !_bfd_elf_init_reloc_shdr (abfd,
2793 &elf_section_data (asect)->rel_hdr,
2799 /* Fill in the contents of a SHT_GROUP section. */
2802 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2804 bfd_boolean *failedptr = failedptrarg;
2805 unsigned long symindx;
2806 asection *elt, *first;
2810 /* Ignore linker created group section. See elfNN_ia64_object_p in
2812 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2817 if (elf_group_id (sec) != NULL)
2818 symindx = elf_group_id (sec)->udata.i;
2822 /* If called from the assembler, swap_out_syms will have set up
2823 elf_section_syms; If called for "ld -r", use target_index. */
2824 if (elf_section_syms (abfd) != NULL)
2825 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2827 symindx = sec->target_index;
2829 elf_section_data (sec)->this_hdr.sh_info = symindx;
2831 /* The contents won't be allocated for "ld -r" or objcopy. */
2833 if (sec->contents == NULL)
2836 sec->contents = bfd_alloc (abfd, sec->size);
2838 /* Arrange for the section to be written out. */
2839 elf_section_data (sec)->this_hdr.contents = sec->contents;
2840 if (sec->contents == NULL)
2847 loc = sec->contents + sec->size;
2849 /* Get the pointer to the first section in the group that gas
2850 squirreled away here. objcopy arranges for this to be set to the
2851 start of the input section group. */
2852 first = elt = elf_next_in_group (sec);
2854 /* First element is a flag word. Rest of section is elf section
2855 indices for all the sections of the group. Write them backwards
2856 just to keep the group in the same order as given in .section
2857 directives, not that it matters. */
2866 s = s->output_section;
2869 idx = elf_section_data (s)->this_idx;
2870 H_PUT_32 (abfd, idx, loc);
2871 elt = elf_next_in_group (elt);
2876 if ((loc -= 4) != sec->contents)
2879 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2882 /* Assign all ELF section numbers. The dummy first section is handled here
2883 too. The link/info pointers for the standard section types are filled
2884 in here too, while we're at it. */
2887 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2889 struct elf_obj_tdata *t = elf_tdata (abfd);
2891 unsigned int section_number, secn;
2892 Elf_Internal_Shdr **i_shdrp;
2893 struct bfd_elf_section_data *d;
2897 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2899 /* SHT_GROUP sections are in relocatable files only. */
2900 if (link_info == NULL || link_info->relocatable)
2902 /* Put SHT_GROUP sections first. */
2903 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2905 d = elf_section_data (sec);
2907 if (d->this_hdr.sh_type == SHT_GROUP)
2909 if (sec->flags & SEC_LINKER_CREATED)
2911 /* Remove the linker created SHT_GROUP sections. */
2912 bfd_section_list_remove (abfd, sec);
2913 abfd->section_count--;
2917 if (section_number == SHN_LORESERVE)
2918 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2919 d->this_idx = section_number++;
2925 for (sec = abfd->sections; sec; sec = sec->next)
2927 d = elf_section_data (sec);
2929 if (d->this_hdr.sh_type != SHT_GROUP)
2931 if (section_number == SHN_LORESERVE)
2932 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2933 d->this_idx = section_number++;
2935 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2936 if ((sec->flags & SEC_RELOC) == 0)
2940 if (section_number == SHN_LORESERVE)
2941 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2942 d->rel_idx = section_number++;
2943 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2948 if (section_number == SHN_LORESERVE)
2949 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2950 d->rel_idx2 = section_number++;
2951 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2957 if (section_number == SHN_LORESERVE)
2958 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2959 t->shstrtab_section = section_number++;
2960 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2961 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2963 if (bfd_get_symcount (abfd) > 0)
2965 if (section_number == SHN_LORESERVE)
2966 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2967 t->symtab_section = section_number++;
2968 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2969 if (section_number > SHN_LORESERVE - 2)
2971 if (section_number == SHN_LORESERVE)
2972 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2973 t->symtab_shndx_section = section_number++;
2974 t->symtab_shndx_hdr.sh_name
2975 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2976 ".symtab_shndx", FALSE);
2977 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2980 if (section_number == SHN_LORESERVE)
2981 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2982 t->strtab_section = section_number++;
2983 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2986 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2987 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2989 elf_numsections (abfd) = section_number;
2990 elf_elfheader (abfd)->e_shnum = section_number;
2991 if (section_number > SHN_LORESERVE)
2992 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2994 /* Set up the list of section header pointers, in agreement with the
2996 i_shdrp = bfd_zalloc2 (abfd, section_number, sizeof (Elf_Internal_Shdr *));
2997 if (i_shdrp == NULL)
3000 i_shdrp[0] = bfd_zalloc (abfd, sizeof (Elf_Internal_Shdr));
3001 if (i_shdrp[0] == NULL)
3003 bfd_release (abfd, i_shdrp);
3007 elf_elfsections (abfd) = i_shdrp;
3009 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3010 if (bfd_get_symcount (abfd) > 0)
3012 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3013 if (elf_numsections (abfd) > SHN_LORESERVE)
3015 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3016 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3018 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3019 t->symtab_hdr.sh_link = t->strtab_section;
3022 for (sec = abfd->sections; sec; sec = sec->next)
3024 struct bfd_elf_section_data *d = elf_section_data (sec);
3028 i_shdrp[d->this_idx] = &d->this_hdr;
3029 if (d->rel_idx != 0)
3030 i_shdrp[d->rel_idx] = &d->rel_hdr;
3031 if (d->rel_idx2 != 0)
3032 i_shdrp[d->rel_idx2] = d->rel_hdr2;
3034 /* Fill in the sh_link and sh_info fields while we're at it. */
3036 /* sh_link of a reloc section is the section index of the symbol
3037 table. sh_info is the section index of the section to which
3038 the relocation entries apply. */
3039 if (d->rel_idx != 0)
3041 d->rel_hdr.sh_link = t->symtab_section;
3042 d->rel_hdr.sh_info = d->this_idx;
3044 if (d->rel_idx2 != 0)
3046 d->rel_hdr2->sh_link = t->symtab_section;
3047 d->rel_hdr2->sh_info = d->this_idx;
3050 /* We need to set up sh_link for SHF_LINK_ORDER. */
3051 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3053 s = elf_linked_to_section (sec);
3056 /* elf_linked_to_section points to the input section. */
3057 if (link_info != NULL)
3059 /* Check discarded linkonce section. */
3060 if (elf_discarded_section (s))
3063 (*_bfd_error_handler)
3064 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3065 abfd, d->this_hdr.bfd_section,
3067 /* Point to the kept section if it has the same
3068 size as the discarded one. */
3069 kept = _bfd_elf_check_kept_section (s);
3072 bfd_set_error (bfd_error_bad_value);
3078 s = s->output_section;
3079 BFD_ASSERT (s != NULL);
3083 /* Handle objcopy. */
3084 if (s->output_section == NULL)
3086 (*_bfd_error_handler)
3087 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3088 abfd, d->this_hdr.bfd_section, s, s->owner);
3089 bfd_set_error (bfd_error_bad_value);
3092 s = s->output_section;
3094 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3099 The Intel C compiler generates SHT_IA_64_UNWIND with
3100 SHF_LINK_ORDER. But it doesn't set the sh_link or
3101 sh_info fields. Hence we could get the situation
3103 const struct elf_backend_data *bed
3104 = get_elf_backend_data (abfd);
3105 if (bed->link_order_error_handler)
3106 bed->link_order_error_handler
3107 (_("%B: warning: sh_link not set for section `%A'"),
3112 switch (d->this_hdr.sh_type)
3116 /* A reloc section which we are treating as a normal BFD
3117 section. sh_link is the section index of the symbol
3118 table. sh_info is the section index of the section to
3119 which the relocation entries apply. We assume that an
3120 allocated reloc section uses the dynamic symbol table.
3121 FIXME: How can we be sure? */
3122 s = bfd_get_section_by_name (abfd, ".dynsym");
3124 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3126 /* We look up the section the relocs apply to by name. */
3128 if (d->this_hdr.sh_type == SHT_REL)
3132 s = bfd_get_section_by_name (abfd, name);
3134 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3138 /* We assume that a section named .stab*str is a stabs
3139 string section. We look for a section with the same name
3140 but without the trailing ``str'', and set its sh_link
3141 field to point to this section. */
3142 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
3143 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3148 len = strlen (sec->name);
3149 alc = bfd_malloc (len - 2);
3152 memcpy (alc, sec->name, len - 3);
3153 alc[len - 3] = '\0';
3154 s = bfd_get_section_by_name (abfd, alc);
3158 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3160 /* This is a .stab section. */
3161 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3162 elf_section_data (s)->this_hdr.sh_entsize
3163 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3170 case SHT_GNU_verneed:
3171 case SHT_GNU_verdef:
3172 /* sh_link is the section header index of the string table
3173 used for the dynamic entries, or the symbol table, or the
3175 s = bfd_get_section_by_name (abfd, ".dynstr");
3177 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3180 case SHT_GNU_LIBLIST:
3181 /* sh_link is the section header index of the prelink library
3183 used for the dynamic entries, or the symbol table, or the
3185 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3186 ? ".dynstr" : ".gnu.libstr");
3188 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3192 case SHT_GNU_versym:
3193 /* sh_link is the section header index of the symbol table
3194 this hash table or version table is for. */
3195 s = bfd_get_section_by_name (abfd, ".dynsym");
3197 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3201 d->this_hdr.sh_link = t->symtab_section;
3205 for (secn = 1; secn < section_number; ++secn)
3206 if (i_shdrp[secn] == NULL)
3207 i_shdrp[secn] = i_shdrp[0];
3209 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3210 i_shdrp[secn]->sh_name);
3214 /* Map symbol from it's internal number to the external number, moving
3215 all local symbols to be at the head of the list. */
3218 sym_is_global (bfd *abfd, asymbol *sym)
3220 /* If the backend has a special mapping, use it. */
3221 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3222 if (bed->elf_backend_sym_is_global)
3223 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3225 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3226 || bfd_is_und_section (bfd_get_section (sym))
3227 || bfd_is_com_section (bfd_get_section (sym)));
3231 elf_map_symbols (bfd *abfd)
3233 unsigned int symcount = bfd_get_symcount (abfd);
3234 asymbol **syms = bfd_get_outsymbols (abfd);
3235 asymbol **sect_syms;
3236 unsigned int num_locals = 0;
3237 unsigned int num_globals = 0;
3238 unsigned int num_locals2 = 0;
3239 unsigned int num_globals2 = 0;
3246 fprintf (stderr, "elf_map_symbols\n");
3250 for (asect = abfd->sections; asect; asect = asect->next)
3252 if (max_index < asect->index)
3253 max_index = asect->index;
3257 sect_syms = bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3258 if (sect_syms == NULL)
3260 elf_section_syms (abfd) = sect_syms;
3261 elf_num_section_syms (abfd) = max_index;
3263 /* Init sect_syms entries for any section symbols we have already
3264 decided to output. */
3265 for (idx = 0; idx < symcount; idx++)
3267 asymbol *sym = syms[idx];
3269 if ((sym->flags & BSF_SECTION_SYM) != 0
3276 if (sec->owner != NULL)
3278 if (sec->owner != abfd)
3280 if (sec->output_offset != 0)
3283 sec = sec->output_section;
3285 /* Empty sections in the input files may have had a
3286 section symbol created for them. (See the comment
3287 near the end of _bfd_generic_link_output_symbols in
3288 linker.c). If the linker script discards such
3289 sections then we will reach this point. Since we know
3290 that we cannot avoid this case, we detect it and skip
3291 the abort and the assignment to the sect_syms array.
3292 To reproduce this particular case try running the
3293 linker testsuite test ld-scripts/weak.exp for an ELF
3294 port that uses the generic linker. */
3295 if (sec->owner == NULL)
3298 BFD_ASSERT (sec->owner == abfd);
3300 sect_syms[sec->index] = syms[idx];
3305 /* Classify all of the symbols. */
3306 for (idx = 0; idx < symcount; idx++)
3308 if (!sym_is_global (abfd, syms[idx]))
3314 /* We will be adding a section symbol for each BFD section. Most normal
3315 sections will already have a section symbol in outsymbols, but
3316 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3317 at least in that case. */
3318 for (asect = abfd->sections; asect; asect = asect->next)
3320 if (sect_syms[asect->index] == NULL)
3322 if (!sym_is_global (abfd, asect->symbol))
3329 /* Now sort the symbols so the local symbols are first. */
3330 new_syms = bfd_alloc2 (abfd, num_locals + num_globals, sizeof (asymbol *));
3332 if (new_syms == NULL)
3335 for (idx = 0; idx < symcount; idx++)
3337 asymbol *sym = syms[idx];
3340 if (!sym_is_global (abfd, sym))
3343 i = num_locals + num_globals2++;
3345 sym->udata.i = i + 1;
3347 for (asect = abfd->sections; asect; asect = asect->next)
3349 if (sect_syms[asect->index] == NULL)
3351 asymbol *sym = asect->symbol;
3354 sect_syms[asect->index] = sym;
3355 if (!sym_is_global (abfd, sym))
3358 i = num_locals + num_globals2++;
3360 sym->udata.i = i + 1;
3364 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3366 elf_num_locals (abfd) = num_locals;
3367 elf_num_globals (abfd) = num_globals;
3371 /* Align to the maximum file alignment that could be required for any
3372 ELF data structure. */
3374 static inline file_ptr
3375 align_file_position (file_ptr off, int align)
3377 return (off + align - 1) & ~(align - 1);
3380 /* Assign a file position to a section, optionally aligning to the
3381 required section alignment. */
3384 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3392 al = i_shdrp->sh_addralign;
3394 offset = BFD_ALIGN (offset, al);
3396 i_shdrp->sh_offset = offset;
3397 if (i_shdrp->bfd_section != NULL)
3398 i_shdrp->bfd_section->filepos = offset;
3399 if (i_shdrp->sh_type != SHT_NOBITS)
3400 offset += i_shdrp->sh_size;
3404 /* Compute the file positions we are going to put the sections at, and
3405 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3406 is not NULL, this is being called by the ELF backend linker. */
3409 _bfd_elf_compute_section_file_positions (bfd *abfd,
3410 struct bfd_link_info *link_info)
3412 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3414 struct bfd_strtab_hash *strtab = NULL;
3415 Elf_Internal_Shdr *shstrtab_hdr;
3417 if (abfd->output_has_begun)
3420 /* Do any elf backend specific processing first. */
3421 if (bed->elf_backend_begin_write_processing)
3422 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3424 if (! prep_headers (abfd))
3427 /* Post process the headers if necessary. */
3428 if (bed->elf_backend_post_process_headers)
3429 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3432 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3436 if (!assign_section_numbers (abfd, link_info))
3439 /* The backend linker builds symbol table information itself. */
3440 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3442 /* Non-zero if doing a relocatable link. */
3443 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3445 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3449 if (link_info == NULL)
3451 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3456 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3457 /* sh_name was set in prep_headers. */
3458 shstrtab_hdr->sh_type = SHT_STRTAB;
3459 shstrtab_hdr->sh_flags = 0;
3460 shstrtab_hdr->sh_addr = 0;
3461 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3462 shstrtab_hdr->sh_entsize = 0;
3463 shstrtab_hdr->sh_link = 0;
3464 shstrtab_hdr->sh_info = 0;
3465 /* sh_offset is set in assign_file_positions_except_relocs. */
3466 shstrtab_hdr->sh_addralign = 1;
3468 if (!assign_file_positions_except_relocs (abfd, link_info))
3471 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3474 Elf_Internal_Shdr *hdr;
3476 off = elf_tdata (abfd)->next_file_pos;
3478 hdr = &elf_tdata (abfd)->symtab_hdr;
3479 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3481 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3482 if (hdr->sh_size != 0)
3483 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3485 hdr = &elf_tdata (abfd)->strtab_hdr;
3486 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3488 elf_tdata (abfd)->next_file_pos = off;
3490 /* Now that we know where the .strtab section goes, write it
3492 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3493 || ! _bfd_stringtab_emit (abfd, strtab))
3495 _bfd_stringtab_free (strtab);
3498 abfd->output_has_begun = TRUE;
3503 /* Create a mapping from a set of sections to a program segment. */
3505 static struct elf_segment_map *
3506 make_mapping (bfd *abfd,
3507 asection **sections,
3512 struct elf_segment_map *m;
3517 amt = sizeof (struct elf_segment_map);
3518 amt += (to - from - 1) * sizeof (asection *);
3519 m = bfd_zalloc (abfd, amt);
3523 m->p_type = PT_LOAD;
3524 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3525 m->sections[i - from] = *hdrpp;
3526 m->count = to - from;
3528 if (from == 0 && phdr)
3530 /* Include the headers in the first PT_LOAD segment. */
3531 m->includes_filehdr = 1;
3532 m->includes_phdrs = 1;
3538 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3541 struct elf_segment_map *
3542 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3544 struct elf_segment_map *m;
3546 m = bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3550 m->p_type = PT_DYNAMIC;
3552 m->sections[0] = dynsec;
3557 /* Set up a mapping from BFD sections to program segments. */
3560 map_sections_to_segments (bfd *abfd)
3562 asection **sections = NULL;
3566 struct elf_segment_map *mfirst;
3567 struct elf_segment_map **pm;
3568 struct elf_segment_map *m;
3571 unsigned int phdr_index;
3572 bfd_vma maxpagesize;
3574 bfd_boolean phdr_in_segment = TRUE;
3575 bfd_boolean writable;
3577 asection *first_tls = NULL;
3578 asection *dynsec, *eh_frame_hdr;
3581 if (elf_tdata (abfd)->segment_map != NULL)
3584 if (bfd_count_sections (abfd) == 0)
3587 /* Select the allocated sections, and sort them. */
3589 sections = bfd_malloc2 (bfd_count_sections (abfd), sizeof (asection *));
3590 if (sections == NULL)
3594 for (s = abfd->sections; s != NULL; s = s->next)
3596 if ((s->flags & SEC_ALLOC) != 0)
3602 BFD_ASSERT (i <= bfd_count_sections (abfd));
3605 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3607 /* Build the mapping. */
3612 /* If we have a .interp section, then create a PT_PHDR segment for
3613 the program headers and a PT_INTERP segment for the .interp
3615 s = bfd_get_section_by_name (abfd, ".interp");
3616 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3618 amt = sizeof (struct elf_segment_map);
3619 m = bfd_zalloc (abfd, amt);
3623 m->p_type = PT_PHDR;
3624 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3625 m->p_flags = PF_R | PF_X;
3626 m->p_flags_valid = 1;
3627 m->includes_phdrs = 1;
3632 amt = sizeof (struct elf_segment_map);
3633 m = bfd_zalloc (abfd, amt);
3637 m->p_type = PT_INTERP;
3645 /* Look through the sections. We put sections in the same program
3646 segment when the start of the second section can be placed within
3647 a few bytes of the end of the first section. */
3651 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3653 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3655 && (dynsec->flags & SEC_LOAD) == 0)
3658 /* Deal with -Ttext or something similar such that the first section
3659 is not adjacent to the program headers. This is an
3660 approximation, since at this point we don't know exactly how many
3661 program headers we will need. */
3664 bfd_size_type phdr_size;
3666 phdr_size = elf_tdata (abfd)->program_header_size;
3668 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3669 if ((abfd->flags & D_PAGED) == 0
3670 || sections[0]->lma < phdr_size
3671 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3672 phdr_in_segment = FALSE;
3675 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3678 bfd_boolean new_segment;
3682 /* See if this section and the last one will fit in the same
3685 if (last_hdr == NULL)
3687 /* If we don't have a segment yet, then we don't need a new
3688 one (we build the last one after this loop). */
3689 new_segment = FALSE;
3691 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3693 /* If this section has a different relation between the
3694 virtual address and the load address, then we need a new
3698 else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
3699 < BFD_ALIGN (hdr->lma, maxpagesize))
3701 /* If putting this section in this segment would force us to
3702 skip a page in the segment, then we need a new segment. */
3705 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3706 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3708 /* We don't want to put a loadable section after a
3709 nonloadable section in the same segment.
3710 Consider .tbss sections as loadable for this purpose. */
3713 else if ((abfd->flags & D_PAGED) == 0)
3715 /* If the file is not demand paged, which means that we
3716 don't require the sections to be correctly aligned in the
3717 file, then there is no other reason for a new segment. */
3718 new_segment = FALSE;
3721 && (hdr->flags & SEC_READONLY) == 0
3722 && (((last_hdr->lma + last_size - 1)
3723 & ~(maxpagesize - 1))
3724 != (hdr->lma & ~(maxpagesize - 1))))
3726 /* We don't want to put a writable section in a read only
3727 segment, unless they are on the same page in memory
3728 anyhow. We already know that the last section does not
3729 bring us past the current section on the page, so the
3730 only case in which the new section is not on the same
3731 page as the previous section is when the previous section
3732 ends precisely on a page boundary. */
3737 /* Otherwise, we can use the same segment. */
3738 new_segment = FALSE;
3743 if ((hdr->flags & SEC_READONLY) == 0)
3746 /* .tbss sections effectively have zero size. */
3747 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3748 last_size = hdr->size;
3754 /* We need a new program segment. We must create a new program
3755 header holding all the sections from phdr_index until hdr. */
3757 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3764 if ((hdr->flags & SEC_READONLY) == 0)
3770 /* .tbss sections effectively have zero size. */
3771 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
3772 last_size = hdr->size;
3776 phdr_in_segment = FALSE;
3779 /* Create a final PT_LOAD program segment. */
3780 if (last_hdr != NULL)
3782 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3790 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3793 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
3800 /* For each loadable .note section, add a PT_NOTE segment. We don't
3801 use bfd_get_section_by_name, because if we link together
3802 nonloadable .note sections and loadable .note sections, we will
3803 generate two .note sections in the output file. FIXME: Using
3804 names for section types is bogus anyhow. */
3805 for (s = abfd->sections; s != NULL; s = s->next)
3807 if ((s->flags & SEC_LOAD) != 0
3808 && strncmp (s->name, ".note", 5) == 0)
3810 amt = sizeof (struct elf_segment_map);
3811 m = bfd_zalloc (abfd, amt);
3815 m->p_type = PT_NOTE;
3822 if (s->flags & SEC_THREAD_LOCAL)
3830 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3835 amt = sizeof (struct elf_segment_map);
3836 amt += (tls_count - 1) * sizeof (asection *);
3837 m = bfd_zalloc (abfd, amt);
3842 m->count = tls_count;
3843 /* Mandated PF_R. */
3845 m->p_flags_valid = 1;
3846 for (i = 0; i < tls_count; ++i)
3848 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3849 m->sections[i] = first_tls;
3850 first_tls = first_tls->next;
3857 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3859 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3860 if (eh_frame_hdr != NULL
3861 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3863 amt = sizeof (struct elf_segment_map);
3864 m = bfd_zalloc (abfd, amt);
3868 m->p_type = PT_GNU_EH_FRAME;
3870 m->sections[0] = eh_frame_hdr->output_section;
3876 if (elf_tdata (abfd)->stack_flags)
3878 amt = sizeof (struct elf_segment_map);
3879 m = bfd_zalloc (abfd, amt);
3883 m->p_type = PT_GNU_STACK;
3884 m->p_flags = elf_tdata (abfd)->stack_flags;
3885 m->p_flags_valid = 1;
3891 if (elf_tdata (abfd)->relro)
3893 amt = sizeof (struct elf_segment_map);
3894 m = bfd_zalloc (abfd, amt);
3898 m->p_type = PT_GNU_RELRO;
3900 m->p_flags_valid = 1;
3909 elf_tdata (abfd)->segment_map = mfirst;
3913 if (sections != NULL)
3918 /* Sort sections by address. */
3921 elf_sort_sections (const void *arg1, const void *arg2)
3923 const asection *sec1 = *(const asection **) arg1;
3924 const asection *sec2 = *(const asection **) arg2;
3925 bfd_size_type size1, size2;
3927 /* Sort by LMA first, since this is the address used to
3928 place the section into a segment. */
3929 if (sec1->lma < sec2->lma)
3931 else if (sec1->lma > sec2->lma)
3934 /* Then sort by VMA. Normally the LMA and the VMA will be
3935 the same, and this will do nothing. */
3936 if (sec1->vma < sec2->vma)
3938 else if (sec1->vma > sec2->vma)
3941 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3943 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3949 /* If the indicies are the same, do not return 0
3950 here, but continue to try the next comparison. */
3951 if (sec1->target_index - sec2->target_index != 0)
3952 return sec1->target_index - sec2->target_index;
3957 else if (TOEND (sec2))
3962 /* Sort by size, to put zero sized sections
3963 before others at the same address. */
3965 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
3966 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
3973 return sec1->target_index - sec2->target_index;
3976 /* Ian Lance Taylor writes:
3978 We shouldn't be using % with a negative signed number. That's just
3979 not good. We have to make sure either that the number is not
3980 negative, or that the number has an unsigned type. When the types
3981 are all the same size they wind up as unsigned. When file_ptr is a
3982 larger signed type, the arithmetic winds up as signed long long,
3985 What we're trying to say here is something like ``increase OFF by
3986 the least amount that will cause it to be equal to the VMA modulo
3988 /* In other words, something like:
3990 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3991 off_offset = off % bed->maxpagesize;
3992 if (vma_offset < off_offset)
3993 adjustment = vma_offset + bed->maxpagesize - off_offset;
3995 adjustment = vma_offset - off_offset;
3997 which can can be collapsed into the expression below. */
4000 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4002 return ((vma - off) % maxpagesize);
4005 /* Assign file positions to the sections based on the mapping from
4006 sections to segments. This function also sets up some fields in
4007 the file header, and writes out the program headers. */
4010 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
4012 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4014 struct elf_segment_map *m;
4016 Elf_Internal_Phdr *phdrs;
4018 bfd_vma filehdr_vaddr, filehdr_paddr;
4019 bfd_vma phdrs_vaddr, phdrs_paddr;
4020 Elf_Internal_Phdr *p;
4022 if (elf_tdata (abfd)->segment_map == NULL)
4024 if (! map_sections_to_segments (abfd))
4029 /* The placement algorithm assumes that non allocated sections are
4030 not in PT_LOAD segments. We ensure this here by removing such
4031 sections from the segment map. We also remove excluded
4033 for (m = elf_tdata (abfd)->segment_map;
4037 unsigned int new_count;
4041 for (i = 0; i < m->count; i ++)
4043 if ((m->sections[i]->flags & SEC_EXCLUDE) == 0
4044 && ((m->sections[i]->flags & SEC_ALLOC) != 0
4045 || m->p_type != PT_LOAD))
4048 m->sections[new_count] = m->sections[i];
4054 if (new_count != m->count)
4055 m->count = new_count;
4059 if (bed->elf_backend_modify_segment_map)
4061 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
4066 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4069 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4070 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4071 elf_elfheader (abfd)->e_phnum = count;
4075 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4079 /* If we already counted the number of program segments, make sure
4080 that we allocated enough space. This happens when SIZEOF_HEADERS
4081 is used in a linker script. */
4082 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
4083 if (alloc != 0 && count > alloc)
4085 ((*_bfd_error_handler)
4086 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4087 abfd, alloc, count));
4088 bfd_set_error (bfd_error_bad_value);
4095 phdrs = bfd_alloc2 (abfd, alloc, sizeof (Elf_Internal_Phdr));
4099 off = bed->s->sizeof_ehdr;
4100 off += alloc * bed->s->sizeof_phdr;
4107 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4114 /* If elf_segment_map is not from map_sections_to_segments, the
4115 sections may not be correctly ordered. NOTE: sorting should
4116 not be done to the PT_NOTE section of a corefile, which may
4117 contain several pseudo-sections artificially created by bfd.
4118 Sorting these pseudo-sections breaks things badly. */
4120 && !(elf_elfheader (abfd)->e_type == ET_CORE
4121 && m->p_type == PT_NOTE))
4122 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4125 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4126 number of sections with contents contributing to both p_filesz
4127 and p_memsz, followed by a number of sections with no contents
4128 that just contribute to p_memsz. In this loop, OFF tracks next
4129 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4130 an adjustment we use for segments that have no file contents
4131 but need zero filled memory allocation. */
4133 p->p_type = m->p_type;
4134 p->p_flags = m->p_flags;
4136 if (p->p_type == PT_LOAD
4139 bfd_size_type align;
4141 unsigned int align_power = 0;
4143 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4145 unsigned int secalign;
4147 secalign = bfd_get_section_alignment (abfd, *secpp);
4148 if (secalign > align_power)
4149 align_power = secalign;
4151 align = (bfd_size_type) 1 << align_power;
4153 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > align)
4154 align = bed->maxpagesize;
4156 adjust = vma_page_aligned_bias (m->sections[0]->vma, off, align);
4159 && !m->includes_filehdr
4160 && !m->includes_phdrs
4161 && (ufile_ptr) off >= align)
4163 /* If the first section isn't loadable, the same holds for
4164 any other sections. Since the segment won't need file
4165 space, we can make p_offset overlap some prior segment.
4166 However, .tbss is special. If a segment starts with
4167 .tbss, we need to look at the next section to decide
4168 whether the segment has any loadable sections. */
4170 while ((m->sections[i]->flags & SEC_LOAD) == 0)
4172 if ((m->sections[i]->flags & SEC_THREAD_LOCAL) == 0
4176 voff = adjust - align;
4182 /* Make sure the .dynamic section is the first section in the
4183 PT_DYNAMIC segment. */
4184 else if (p->p_type == PT_DYNAMIC
4186 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4189 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4191 bfd_set_error (bfd_error_bad_value);
4198 p->p_vaddr = m->sections[0]->vma;
4200 if (m->p_paddr_valid)
4201 p->p_paddr = m->p_paddr;
4202 else if (m->count == 0)
4205 p->p_paddr = m->sections[0]->lma;
4207 if (p->p_type == PT_LOAD
4208 && (abfd->flags & D_PAGED) != 0)
4209 p->p_align = bed->maxpagesize;
4210 else if (m->count == 0)
4211 p->p_align = 1 << bed->s->log_file_align;
4219 if (m->includes_filehdr)
4221 if (! m->p_flags_valid)
4224 p->p_filesz = bed->s->sizeof_ehdr;
4225 p->p_memsz = bed->s->sizeof_ehdr;
4228 BFD_ASSERT (p->p_type == PT_LOAD);
4230 if (p->p_vaddr < (bfd_vma) off)
4232 (*_bfd_error_handler)
4233 (_("%B: Not enough room for program headers, try linking with -N"),
4235 bfd_set_error (bfd_error_bad_value);
4240 if (! m->p_paddr_valid)
4243 if (p->p_type == PT_LOAD)
4245 filehdr_vaddr = p->p_vaddr;
4246 filehdr_paddr = p->p_paddr;
4250 if (m->includes_phdrs)
4252 if (! m->p_flags_valid)
4255 if (m->includes_filehdr)
4257 if (p->p_type == PT_LOAD)
4259 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
4260 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
4265 p->p_offset = bed->s->sizeof_ehdr;
4269 BFD_ASSERT (p->p_type == PT_LOAD);
4270 p->p_vaddr -= off - p->p_offset;
4271 if (! m->p_paddr_valid)
4272 p->p_paddr -= off - p->p_offset;
4275 if (p->p_type == PT_LOAD)
4277 phdrs_vaddr = p->p_vaddr;
4278 phdrs_paddr = p->p_paddr;
4281 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4284 p->p_filesz += alloc * bed->s->sizeof_phdr;
4285 p->p_memsz += alloc * bed->s->sizeof_phdr;
4288 if (p->p_type == PT_LOAD
4289 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4291 if (! m->includes_filehdr && ! m->includes_phdrs)
4292 p->p_offset = off + voff;
4297 adjust = off - (p->p_offset + p->p_filesz);
4298 p->p_filesz += adjust;
4299 p->p_memsz += adjust;
4303 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4307 bfd_size_type align;
4311 align = 1 << bfd_get_section_alignment (abfd, sec);
4313 if (p->p_type == PT_LOAD
4314 || p->p_type == PT_TLS)
4316 bfd_signed_vma adjust;
4318 if ((flags & SEC_LOAD) != 0)
4320 adjust = sec->lma - (p->p_paddr + p->p_filesz);
4323 (*_bfd_error_handler)
4324 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4325 abfd, sec, (unsigned long) sec->lma);
4329 p->p_filesz += adjust;
4330 p->p_memsz += adjust;
4332 /* .tbss is special. It doesn't contribute to p_memsz of
4334 else if ((flags & SEC_THREAD_LOCAL) == 0
4335 || p->p_type == PT_TLS)
4337 /* The section VMA must equal the file position
4338 modulo the page size. */
4339 bfd_size_type page = align;
4340 if ((abfd->flags & D_PAGED) != 0 && bed->maxpagesize > page)
4341 page = bed->maxpagesize;
4342 adjust = vma_page_aligned_bias (sec->vma,
4343 p->p_vaddr + p->p_memsz,
4345 p->p_memsz += adjust;
4349 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4351 /* The section at i == 0 is the one that actually contains
4357 p->p_filesz = sec->size;
4363 /* The rest are fake sections that shouldn't be written. */
4372 if (p->p_type == PT_LOAD)
4375 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4376 1997, and the exact reason for it isn't clear. One
4377 plausible explanation is that it is to work around
4378 a problem we have with linker scripts using data
4379 statements in NOLOAD sections. I don't think it
4380 makes a great deal of sense to have such a section
4381 assigned to a PT_LOAD segment, but apparently
4382 people do this. The data statement results in a
4383 bfd_data_link_order being built, and these need
4384 section contents to write into. Eventually, we get
4385 to _bfd_elf_write_object_contents which writes any
4386 section with contents to the output. Make room
4387 here for the write, so that following segments are
4389 if ((flags & SEC_LOAD) != 0
4390 || (flags & SEC_HAS_CONTENTS) != 0)
4394 if ((flags & SEC_LOAD) != 0)
4396 p->p_filesz += sec->size;
4397 p->p_memsz += sec->size;
4399 /* PR ld/594: Sections in note segments which are not loaded
4400 contribute to the file size but not the in-memory size. */
4401 else if (p->p_type == PT_NOTE
4402 && (flags & SEC_HAS_CONTENTS) != 0)
4403 p->p_filesz += sec->size;
4405 /* .tbss is special. It doesn't contribute to p_memsz of
4407 else if ((flags & SEC_THREAD_LOCAL) == 0
4408 || p->p_type == PT_TLS)
4409 p->p_memsz += sec->size;
4411 if (p->p_type == PT_TLS
4413 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4415 struct bfd_link_order *o = sec->map_tail.link_order;
4417 p->p_memsz += o->offset + o->size;
4420 if (align > p->p_align
4421 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4425 if (! m->p_flags_valid)
4428 if ((flags & SEC_CODE) != 0)
4430 if ((flags & SEC_READONLY) == 0)
4436 /* Now that we have set the section file positions, we can set up
4437 the file positions for the non PT_LOAD segments. */
4438 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4442 if (p->p_type != PT_LOAD && m->count > 0)
4444 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4445 /* If the section has not yet been assigned a file position,
4446 do so now. The ARM BPABI requires that .dynamic section
4447 not be marked SEC_ALLOC because it is not part of any
4448 PT_LOAD segment, so it will not be processed above. */
4449 if (p->p_type == PT_DYNAMIC && m->sections[0]->filepos == 0)
4452 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4455 while (i_shdrpp[i]->bfd_section != m->sections[0])
4457 off = (_bfd_elf_assign_file_position_for_section
4458 (i_shdrpp[i], off, TRUE));
4459 p->p_filesz = m->sections[0]->size;
4461 p->p_offset = m->sections[0]->filepos;
4465 if (m->includes_filehdr)
4467 p->p_vaddr = filehdr_vaddr;
4468 if (! m->p_paddr_valid)
4469 p->p_paddr = filehdr_paddr;
4471 else if (m->includes_phdrs)
4473 p->p_vaddr = phdrs_vaddr;
4474 if (! m->p_paddr_valid)
4475 p->p_paddr = phdrs_paddr;
4477 else if (p->p_type == PT_GNU_RELRO)
4479 Elf_Internal_Phdr *lp;
4481 for (lp = phdrs; lp < phdrs + count; ++lp)
4483 if (lp->p_type == PT_LOAD
4484 && lp->p_vaddr <= link_info->relro_end
4485 && lp->p_vaddr >= link_info->relro_start
4486 && lp->p_vaddr + lp->p_filesz
4487 >= link_info->relro_end)
4491 if (lp < phdrs + count
4492 && link_info->relro_end > lp->p_vaddr)
4494 p->p_vaddr = lp->p_vaddr;
4495 p->p_paddr = lp->p_paddr;
4496 p->p_offset = lp->p_offset;
4497 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4498 p->p_memsz = p->p_filesz;
4500 p->p_flags = (lp->p_flags & ~PF_W);
4504 memset (p, 0, sizeof *p);
4505 p->p_type = PT_NULL;
4511 /* Clear out any program headers we allocated but did not use. */
4512 for (; count < alloc; count++, p++)
4514 memset (p, 0, sizeof *p);
4515 p->p_type = PT_NULL;
4518 elf_tdata (abfd)->phdr = phdrs;
4520 elf_tdata (abfd)->next_file_pos = off;
4522 /* Write out the program headers. */
4523 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4524 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4530 /* Get the size of the program header.
4532 If this is called by the linker before any of the section VMA's are set, it
4533 can't calculate the correct value for a strange memory layout. This only
4534 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4535 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4536 data segment (exclusive of .interp and .dynamic).
4538 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4539 will be two segments. */
4541 static bfd_size_type
4542 get_program_header_size (bfd *abfd)
4546 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4548 /* We can't return a different result each time we're called. */
4549 if (elf_tdata (abfd)->program_header_size != 0)
4550 return elf_tdata (abfd)->program_header_size;
4552 if (elf_tdata (abfd)->segment_map != NULL)
4554 struct elf_segment_map *m;
4557 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4559 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4560 return elf_tdata (abfd)->program_header_size;
4563 /* Assume we will need exactly two PT_LOAD segments: one for text
4564 and one for data. */
4567 s = bfd_get_section_by_name (abfd, ".interp");
4568 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4570 /* If we have a loadable interpreter section, we need a
4571 PT_INTERP segment. In this case, assume we also need a
4572 PT_PHDR segment, although that may not be true for all
4577 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4579 /* We need a PT_DYNAMIC segment. */
4583 if (elf_tdata (abfd)->eh_frame_hdr)
4585 /* We need a PT_GNU_EH_FRAME segment. */
4589 if (elf_tdata (abfd)->stack_flags)
4591 /* We need a PT_GNU_STACK segment. */
4595 if (elf_tdata (abfd)->relro)
4597 /* We need a PT_GNU_RELRO segment. */
4601 for (s = abfd->sections; s != NULL; s = s->next)
4603 if ((s->flags & SEC_LOAD) != 0
4604 && strncmp (s->name, ".note", 5) == 0)
4606 /* We need a PT_NOTE segment. */
4611 for (s = abfd->sections; s != NULL; s = s->next)
4613 if (s->flags & SEC_THREAD_LOCAL)
4615 /* We need a PT_TLS segment. */
4621 /* Let the backend count up any program headers it might need. */
4622 if (bed->elf_backend_additional_program_headers)
4626 a = (*bed->elf_backend_additional_program_headers) (abfd);
4632 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4633 return elf_tdata (abfd)->program_header_size;
4636 /* Work out the file positions of all the sections. This is called by
4637 _bfd_elf_compute_section_file_positions. All the section sizes and
4638 VMAs must be known before this is called.
4640 Reloc sections come in two flavours: Those processed specially as
4641 "side-channel" data attached to a section to which they apply, and
4642 those that bfd doesn't process as relocations. The latter sort are
4643 stored in a normal bfd section by bfd_section_from_shdr. We don't
4644 consider the former sort here, unless they form part of the loadable
4645 image. Reloc sections not assigned here will be handled later by
4646 assign_file_positions_for_relocs.
4648 We also don't set the positions of the .symtab and .strtab here. */
4651 assign_file_positions_except_relocs (bfd *abfd,
4652 struct bfd_link_info *link_info)
4654 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4655 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4656 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4657 unsigned int num_sec = elf_numsections (abfd);
4659 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4661 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4662 && bfd_get_format (abfd) != bfd_core)
4664 Elf_Internal_Shdr **hdrpp;
4667 /* Start after the ELF header. */
4668 off = i_ehdrp->e_ehsize;
4670 /* We are not creating an executable, which means that we are
4671 not creating a program header, and that the actual order of
4672 the sections in the file is unimportant. */
4673 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4675 Elf_Internal_Shdr *hdr;
4678 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4679 && hdr->bfd_section == NULL)
4680 || i == tdata->symtab_section
4681 || i == tdata->symtab_shndx_section
4682 || i == tdata->strtab_section)
4684 hdr->sh_offset = -1;
4687 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4689 if (i == SHN_LORESERVE - 1)
4691 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4692 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4699 Elf_Internal_Shdr **hdrpp;
4701 /* Assign file positions for the loaded sections based on the
4702 assignment of sections to segments. */
4703 if (! assign_file_positions_for_segments (abfd, link_info))
4706 /* Assign file positions for the other sections. */
4708 off = elf_tdata (abfd)->next_file_pos;
4709 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4711 Elf_Internal_Shdr *hdr;
4714 if (hdr->bfd_section != NULL
4715 && hdr->bfd_section->filepos != 0)
4716 hdr->sh_offset = hdr->bfd_section->filepos;
4717 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4719 ((*_bfd_error_handler)
4720 (_("%B: warning: allocated section `%s' not in segment"),
4722 (hdr->bfd_section == NULL
4724 : hdr->bfd_section->name)));
4725 if ((abfd->flags & D_PAGED) != 0)
4726 off += vma_page_aligned_bias (hdr->sh_addr, off,
4729 off += vma_page_aligned_bias (hdr->sh_addr, off,
4731 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4734 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4735 && hdr->bfd_section == NULL)
4736 || hdr == i_shdrpp[tdata->symtab_section]
4737 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4738 || hdr == i_shdrpp[tdata->strtab_section])
4739 hdr->sh_offset = -1;
4741 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4743 if (i == SHN_LORESERVE - 1)
4745 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4746 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4751 /* Place the section headers. */
4752 off = align_file_position (off, 1 << bed->s->log_file_align);
4753 i_ehdrp->e_shoff = off;
4754 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4756 elf_tdata (abfd)->next_file_pos = off;
4762 prep_headers (bfd *abfd)
4764 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4765 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4766 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4767 struct elf_strtab_hash *shstrtab;
4768 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4770 i_ehdrp = elf_elfheader (abfd);
4771 i_shdrp = elf_elfsections (abfd);
4773 shstrtab = _bfd_elf_strtab_init ();
4774 if (shstrtab == NULL)
4777 elf_shstrtab (abfd) = shstrtab;
4779 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4780 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4781 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4782 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4784 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4785 i_ehdrp->e_ident[EI_DATA] =
4786 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4787 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4789 if ((abfd->flags & DYNAMIC) != 0)
4790 i_ehdrp->e_type = ET_DYN;
4791 else if ((abfd->flags & EXEC_P) != 0)
4792 i_ehdrp->e_type = ET_EXEC;
4793 else if (bfd_get_format (abfd) == bfd_core)
4794 i_ehdrp->e_type = ET_CORE;
4796 i_ehdrp->e_type = ET_REL;
4798 switch (bfd_get_arch (abfd))
4800 case bfd_arch_unknown:
4801 i_ehdrp->e_machine = EM_NONE;
4804 /* There used to be a long list of cases here, each one setting
4805 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4806 in the corresponding bfd definition. To avoid duplication,
4807 the switch was removed. Machines that need special handling
4808 can generally do it in elf_backend_final_write_processing(),
4809 unless they need the information earlier than the final write.
4810 Such need can generally be supplied by replacing the tests for
4811 e_machine with the conditions used to determine it. */
4813 i_ehdrp->e_machine = bed->elf_machine_code;
4816 i_ehdrp->e_version = bed->s->ev_current;
4817 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4819 /* No program header, for now. */
4820 i_ehdrp->e_phoff = 0;
4821 i_ehdrp->e_phentsize = 0;
4822 i_ehdrp->e_phnum = 0;
4824 /* Each bfd section is section header entry. */
4825 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4826 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4828 /* If we're building an executable, we'll need a program header table. */
4829 if (abfd->flags & EXEC_P)
4830 /* It all happens later. */
4834 i_ehdrp->e_phentsize = 0;
4836 i_ehdrp->e_phoff = 0;
4839 elf_tdata (abfd)->symtab_hdr.sh_name =
4840 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4841 elf_tdata (abfd)->strtab_hdr.sh_name =
4842 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4843 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4844 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4845 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4846 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4847 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4853 /* Assign file positions for all the reloc sections which are not part
4854 of the loadable file image. */
4857 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4860 unsigned int i, num_sec;
4861 Elf_Internal_Shdr **shdrpp;
4863 off = elf_tdata (abfd)->next_file_pos;
4865 num_sec = elf_numsections (abfd);
4866 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4868 Elf_Internal_Shdr *shdrp;
4871 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4872 && shdrp->sh_offset == -1)
4873 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4876 elf_tdata (abfd)->next_file_pos = off;
4880 _bfd_elf_write_object_contents (bfd *abfd)
4882 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4883 Elf_Internal_Ehdr *i_ehdrp;
4884 Elf_Internal_Shdr **i_shdrp;
4886 unsigned int count, num_sec;
4888 if (! abfd->output_has_begun
4889 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4892 i_shdrp = elf_elfsections (abfd);
4893 i_ehdrp = elf_elfheader (abfd);
4896 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4900 _bfd_elf_assign_file_positions_for_relocs (abfd);
4902 /* After writing the headers, we need to write the sections too... */
4903 num_sec = elf_numsections (abfd);
4904 for (count = 1; count < num_sec; count++)
4906 if (bed->elf_backend_section_processing)
4907 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4908 if (i_shdrp[count]->contents)
4910 bfd_size_type amt = i_shdrp[count]->sh_size;
4912 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4913 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4916 if (count == SHN_LORESERVE - 1)
4917 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4920 /* Write out the section header names. */
4921 if (elf_shstrtab (abfd) != NULL
4922 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4923 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
4926 if (bed->elf_backend_final_write_processing)
4927 (*bed->elf_backend_final_write_processing) (abfd,
4928 elf_tdata (abfd)->linker);
4930 return bed->s->write_shdrs_and_ehdr (abfd);
4934 _bfd_elf_write_corefile_contents (bfd *abfd)
4936 /* Hopefully this can be done just like an object file. */
4937 return _bfd_elf_write_object_contents (abfd);
4940 /* Given a section, search the header to find them. */
4943 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4945 const struct elf_backend_data *bed;
4948 if (elf_section_data (asect) != NULL
4949 && elf_section_data (asect)->this_idx != 0)
4950 return elf_section_data (asect)->this_idx;
4952 if (bfd_is_abs_section (asect))
4954 else if (bfd_is_com_section (asect))
4956 else if (bfd_is_und_section (asect))
4961 bed = get_elf_backend_data (abfd);
4962 if (bed->elf_backend_section_from_bfd_section)
4966 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4971 bfd_set_error (bfd_error_nonrepresentable_section);
4976 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4980 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4982 asymbol *asym_ptr = *asym_ptr_ptr;
4984 flagword flags = asym_ptr->flags;
4986 /* When gas creates relocations against local labels, it creates its
4987 own symbol for the section, but does put the symbol into the
4988 symbol chain, so udata is 0. When the linker is generating
4989 relocatable output, this section symbol may be for one of the
4990 input sections rather than the output section. */
4991 if (asym_ptr->udata.i == 0
4992 && (flags & BSF_SECTION_SYM)
4993 && asym_ptr->section)
4997 if (asym_ptr->section->output_section != NULL)
4998 indx = asym_ptr->section->output_section->index;
5000 indx = asym_ptr->section->index;
5001 if (indx < elf_num_section_syms (abfd)
5002 && elf_section_syms (abfd)[indx] != NULL)
5003 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5006 idx = asym_ptr->udata.i;
5010 /* This case can occur when using --strip-symbol on a symbol
5011 which is used in a relocation entry. */
5012 (*_bfd_error_handler)
5013 (_("%B: symbol `%s' required but not present"),
5014 abfd, bfd_asymbol_name (asym_ptr));
5015 bfd_set_error (bfd_error_no_symbols);
5022 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5023 (long) asym_ptr, asym_ptr->name, idx, flags,
5024 elf_symbol_flags (flags));
5032 /* Copy private BFD data. This copies any program header information. */
5035 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5037 Elf_Internal_Ehdr *iehdr;
5038 struct elf_segment_map *map;
5039 struct elf_segment_map *map_first;
5040 struct elf_segment_map **pointer_to_map;
5041 Elf_Internal_Phdr *segment;
5044 unsigned int num_segments;
5045 bfd_boolean phdr_included = FALSE;
5046 bfd_vma maxpagesize;
5047 struct elf_segment_map *phdr_adjust_seg = NULL;
5048 unsigned int phdr_adjust_num = 0;
5049 const struct elf_backend_data *bed;
5051 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5052 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5055 if (elf_tdata (ibfd)->phdr == NULL)
5058 bed = get_elf_backend_data (ibfd);
5059 iehdr = elf_elfheader (ibfd);
5062 pointer_to_map = &map_first;
5064 num_segments = elf_elfheader (ibfd)->e_phnum;
5065 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5067 /* Returns the end address of the segment + 1. */
5068 #define SEGMENT_END(segment, start) \
5069 (start + (segment->p_memsz > segment->p_filesz \
5070 ? segment->p_memsz : segment->p_filesz))
5072 #define SECTION_SIZE(section, segment) \
5073 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5074 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5075 ? section->size : 0)
5077 /* Returns TRUE if the given section is contained within
5078 the given segment. VMA addresses are compared. */
5079 #define IS_CONTAINED_BY_VMA(section, segment) \
5080 (section->vma >= segment->p_vaddr \
5081 && (section->vma + SECTION_SIZE (section, segment) \
5082 <= (SEGMENT_END (segment, segment->p_vaddr))))
5084 /* Returns TRUE if the given section is contained within
5085 the given segment. LMA addresses are compared. */
5086 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5087 (section->lma >= base \
5088 && (section->lma + SECTION_SIZE (section, segment) \
5089 <= SEGMENT_END (segment, base)))
5091 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5092 #define IS_COREFILE_NOTE(p, s) \
5093 (p->p_type == PT_NOTE \
5094 && bfd_get_format (ibfd) == bfd_core \
5095 && s->vma == 0 && s->lma == 0 \
5096 && (bfd_vma) s->filepos >= p->p_offset \
5097 && ((bfd_vma) s->filepos + s->size \
5098 <= p->p_offset + p->p_filesz))
5100 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5101 linker, which generates a PT_INTERP section with p_vaddr and
5102 p_memsz set to 0. */
5103 #define IS_SOLARIS_PT_INTERP(p, s) \
5105 && p->p_paddr == 0 \
5106 && p->p_memsz == 0 \
5107 && p->p_filesz > 0 \
5108 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5110 && (bfd_vma) s->filepos >= p->p_offset \
5111 && ((bfd_vma) s->filepos + s->size \
5112 <= p->p_offset + p->p_filesz))
5114 /* Decide if the given section should be included in the given segment.
5115 A section will be included if:
5116 1. It is within the address space of the segment -- we use the LMA
5117 if that is set for the segment and the VMA otherwise,
5118 2. It is an allocated segment,
5119 3. There is an output section associated with it,
5120 4. The section has not already been allocated to a previous segment.
5121 5. PT_GNU_STACK segments do not include any sections.
5122 6. PT_TLS segment includes only SHF_TLS sections.
5123 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5124 8. PT_DYNAMIC should not contain empty sections at the beginning
5125 (with the possible exception of .dynamic). */
5126 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5127 ((((segment->p_paddr \
5128 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5129 : IS_CONTAINED_BY_VMA (section, segment)) \
5130 && (section->flags & SEC_ALLOC) != 0) \
5131 || IS_COREFILE_NOTE (segment, section)) \
5132 && section->output_section != NULL \
5133 && segment->p_type != PT_GNU_STACK \
5134 && (segment->p_type != PT_TLS \
5135 || (section->flags & SEC_THREAD_LOCAL)) \
5136 && (segment->p_type == PT_LOAD \
5137 || segment->p_type == PT_TLS \
5138 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5139 && (segment->p_type != PT_DYNAMIC \
5140 || SECTION_SIZE (section, segment) > 0 \
5141 || (segment->p_paddr \
5142 ? segment->p_paddr != section->lma \
5143 : segment->p_vaddr != section->vma) \
5144 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5146 && ! section->segment_mark)
5148 /* Returns TRUE iff seg1 starts after the end of seg2. */
5149 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5150 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5152 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5153 their VMA address ranges and their LMA address ranges overlap.
5154 It is possible to have overlapping VMA ranges without overlapping LMA
5155 ranges. RedBoot images for example can have both .data and .bss mapped
5156 to the same VMA range, but with the .data section mapped to a different
5158 #define SEGMENT_OVERLAPS(seg1, seg2) \
5159 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5160 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5161 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5162 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5164 /* Initialise the segment mark field. */
5165 for (section = ibfd->sections; section != NULL; section = section->next)
5166 section->segment_mark = FALSE;
5168 /* Scan through the segments specified in the program header
5169 of the input BFD. For this first scan we look for overlaps
5170 in the loadable segments. These can be created by weird
5171 parameters to objcopy. Also, fix some solaris weirdness. */
5172 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5177 Elf_Internal_Phdr *segment2;
5179 if (segment->p_type == PT_INTERP)
5180 for (section = ibfd->sections; section; section = section->next)
5181 if (IS_SOLARIS_PT_INTERP (segment, section))
5183 /* Mininal change so that the normal section to segment
5184 assignment code will work. */
5185 segment->p_vaddr = section->vma;
5189 if (segment->p_type != PT_LOAD)
5192 /* Determine if this segment overlaps any previous segments. */
5193 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
5195 bfd_signed_vma extra_length;
5197 if (segment2->p_type != PT_LOAD
5198 || ! SEGMENT_OVERLAPS (segment, segment2))
5201 /* Merge the two segments together. */
5202 if (segment2->p_vaddr < segment->p_vaddr)
5204 /* Extend SEGMENT2 to include SEGMENT and then delete
5207 SEGMENT_END (segment, segment->p_vaddr)
5208 - SEGMENT_END (segment2, segment2->p_vaddr);
5210 if (extra_length > 0)
5212 segment2->p_memsz += extra_length;
5213 segment2->p_filesz += extra_length;
5216 segment->p_type = PT_NULL;
5218 /* Since we have deleted P we must restart the outer loop. */
5220 segment = elf_tdata (ibfd)->phdr;
5225 /* Extend SEGMENT to include SEGMENT2 and then delete
5228 SEGMENT_END (segment2, segment2->p_vaddr)
5229 - SEGMENT_END (segment, segment->p_vaddr);
5231 if (extra_length > 0)
5233 segment->p_memsz += extra_length;
5234 segment->p_filesz += extra_length;
5237 segment2->p_type = PT_NULL;
5242 /* The second scan attempts to assign sections to segments. */
5243 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5247 unsigned int section_count;
5248 asection ** sections;
5249 asection * output_section;
5251 bfd_vma matching_lma;
5252 bfd_vma suggested_lma;
5256 if (segment->p_type == PT_NULL)
5259 /* Compute how many sections might be placed into this segment. */
5260 for (section = ibfd->sections, section_count = 0;
5262 section = section->next)
5263 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5266 /* Allocate a segment map big enough to contain
5267 all of the sections we have selected. */
5268 amt = sizeof (struct elf_segment_map);
5269 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5270 map = bfd_alloc (obfd, amt);
5274 /* Initialise the fields of the segment map. Default to
5275 using the physical address of the segment in the input BFD. */
5277 map->p_type = segment->p_type;
5278 map->p_flags = segment->p_flags;
5279 map->p_flags_valid = 1;
5280 map->p_paddr = segment->p_paddr;
5281 map->p_paddr_valid = 1;
5283 /* Determine if this segment contains the ELF file header
5284 and if it contains the program headers themselves. */
5285 map->includes_filehdr = (segment->p_offset == 0
5286 && segment->p_filesz >= iehdr->e_ehsize);
5288 map->includes_phdrs = 0;
5290 if (! phdr_included || segment->p_type != PT_LOAD)
5292 map->includes_phdrs =
5293 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5294 && (segment->p_offset + segment->p_filesz
5295 >= ((bfd_vma) iehdr->e_phoff
5296 + iehdr->e_phnum * iehdr->e_phentsize)));
5298 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5299 phdr_included = TRUE;
5302 if (section_count == 0)
5304 /* Special segments, such as the PT_PHDR segment, may contain
5305 no sections, but ordinary, loadable segments should contain
5306 something. They are allowed by the ELF spec however, so only
5307 a warning is produced. */
5308 if (segment->p_type == PT_LOAD)
5309 (*_bfd_error_handler)
5310 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5314 *pointer_to_map = map;
5315 pointer_to_map = &map->next;
5320 /* Now scan the sections in the input BFD again and attempt
5321 to add their corresponding output sections to the segment map.
5322 The problem here is how to handle an output section which has
5323 been moved (ie had its LMA changed). There are four possibilities:
5325 1. None of the sections have been moved.
5326 In this case we can continue to use the segment LMA from the
5329 2. All of the sections have been moved by the same amount.
5330 In this case we can change the segment's LMA to match the LMA
5331 of the first section.
5333 3. Some of the sections have been moved, others have not.
5334 In this case those sections which have not been moved can be
5335 placed in the current segment which will have to have its size,
5336 and possibly its LMA changed, and a new segment or segments will
5337 have to be created to contain the other sections.
5339 4. The sections have been moved, but not by the same amount.
5340 In this case we can change the segment's LMA to match the LMA
5341 of the first section and we will have to create a new segment
5342 or segments to contain the other sections.
5344 In order to save time, we allocate an array to hold the section
5345 pointers that we are interested in. As these sections get assigned
5346 to a segment, they are removed from this array. */
5348 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5349 to work around this long long bug. */
5350 sections = bfd_malloc2 (section_count, sizeof (asection *));
5351 if (sections == NULL)
5354 /* Step One: Scan for segment vs section LMA conflicts.
5355 Also add the sections to the section array allocated above.
5356 Also add the sections to the current segment. In the common
5357 case, where the sections have not been moved, this means that
5358 we have completely filled the segment, and there is nothing
5364 for (j = 0, section = ibfd->sections;
5366 section = section->next)
5368 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5370 output_section = section->output_section;
5372 sections[j ++] = section;
5374 /* The Solaris native linker always sets p_paddr to 0.
5375 We try to catch that case here, and set it to the
5376 correct value. Note - some backends require that
5377 p_paddr be left as zero. */
5378 if (segment->p_paddr == 0
5379 && segment->p_vaddr != 0
5380 && (! bed->want_p_paddr_set_to_zero)
5382 && output_section->lma != 0
5383 && (output_section->vma == (segment->p_vaddr
5384 + (map->includes_filehdr
5387 + (map->includes_phdrs
5389 * iehdr->e_phentsize)
5391 map->p_paddr = segment->p_vaddr;
5393 /* Match up the physical address of the segment with the
5394 LMA address of the output section. */
5395 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5396 || IS_COREFILE_NOTE (segment, section)
5397 || (bed->want_p_paddr_set_to_zero &&
5398 IS_CONTAINED_BY_VMA (output_section, segment))
5401 if (matching_lma == 0)
5402 matching_lma = output_section->lma;
5404 /* We assume that if the section fits within the segment
5405 then it does not overlap any other section within that
5407 map->sections[isec ++] = output_section;
5409 else if (suggested_lma == 0)
5410 suggested_lma = output_section->lma;
5414 BFD_ASSERT (j == section_count);
5416 /* Step Two: Adjust the physical address of the current segment,
5418 if (isec == section_count)
5420 /* All of the sections fitted within the segment as currently
5421 specified. This is the default case. Add the segment to
5422 the list of built segments and carry on to process the next
5423 program header in the input BFD. */
5424 map->count = section_count;
5425 *pointer_to_map = map;
5426 pointer_to_map = &map->next;
5433 if (matching_lma != 0)
5435 /* At least one section fits inside the current segment.
5436 Keep it, but modify its physical address to match the
5437 LMA of the first section that fitted. */
5438 map->p_paddr = matching_lma;
5442 /* None of the sections fitted inside the current segment.
5443 Change the current segment's physical address to match
5444 the LMA of the first section. */
5445 map->p_paddr = suggested_lma;
5448 /* Offset the segment physical address from the lma
5449 to allow for space taken up by elf headers. */
5450 if (map->includes_filehdr)
5451 map->p_paddr -= iehdr->e_ehsize;
5453 if (map->includes_phdrs)
5455 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5457 /* iehdr->e_phnum is just an estimate of the number
5458 of program headers that we will need. Make a note
5459 here of the number we used and the segment we chose
5460 to hold these headers, so that we can adjust the
5461 offset when we know the correct value. */
5462 phdr_adjust_num = iehdr->e_phnum;
5463 phdr_adjust_seg = map;
5467 /* Step Three: Loop over the sections again, this time assigning
5468 those that fit to the current segment and removing them from the
5469 sections array; but making sure not to leave large gaps. Once all
5470 possible sections have been assigned to the current segment it is
5471 added to the list of built segments and if sections still remain
5472 to be assigned, a new segment is constructed before repeating
5480 /* Fill the current segment with sections that fit. */
5481 for (j = 0; j < section_count; j++)
5483 section = sections[j];
5485 if (section == NULL)
5488 output_section = section->output_section;
5490 BFD_ASSERT (output_section != NULL);
5492 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5493 || IS_COREFILE_NOTE (segment, section))
5495 if (map->count == 0)
5497 /* If the first section in a segment does not start at
5498 the beginning of the segment, then something is
5500 if (output_section->lma !=
5502 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5503 + (map->includes_phdrs
5504 ? iehdr->e_phnum * iehdr->e_phentsize
5510 asection * prev_sec;
5512 prev_sec = map->sections[map->count - 1];
5514 /* If the gap between the end of the previous section
5515 and the start of this section is more than
5516 maxpagesize then we need to start a new segment. */
5517 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5519 < BFD_ALIGN (output_section->lma, maxpagesize))
5520 || ((prev_sec->lma + prev_sec->size)
5521 > output_section->lma))
5523 if (suggested_lma == 0)
5524 suggested_lma = output_section->lma;
5530 map->sections[map->count++] = output_section;
5533 section->segment_mark = TRUE;
5535 else if (suggested_lma == 0)
5536 suggested_lma = output_section->lma;
5539 BFD_ASSERT (map->count > 0);
5541 /* Add the current segment to the list of built segments. */
5542 *pointer_to_map = map;
5543 pointer_to_map = &map->next;
5545 if (isec < section_count)
5547 /* We still have not allocated all of the sections to
5548 segments. Create a new segment here, initialise it
5549 and carry on looping. */
5550 amt = sizeof (struct elf_segment_map);
5551 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5552 map = bfd_alloc (obfd, amt);
5559 /* Initialise the fields of the segment map. Set the physical
5560 physical address to the LMA of the first section that has
5561 not yet been assigned. */
5563 map->p_type = segment->p_type;
5564 map->p_flags = segment->p_flags;
5565 map->p_flags_valid = 1;
5566 map->p_paddr = suggested_lma;
5567 map->p_paddr_valid = 1;
5568 map->includes_filehdr = 0;
5569 map->includes_phdrs = 0;
5572 while (isec < section_count);
5577 /* The Solaris linker creates program headers in which all the
5578 p_paddr fields are zero. When we try to objcopy or strip such a
5579 file, we get confused. Check for this case, and if we find it
5580 reset the p_paddr_valid fields. */
5581 for (map = map_first; map != NULL; map = map->next)
5582 if (map->p_paddr != 0)
5585 for (map = map_first; map != NULL; map = map->next)
5586 map->p_paddr_valid = 0;
5588 elf_tdata (obfd)->segment_map = map_first;
5590 /* If we had to estimate the number of program headers that were
5591 going to be needed, then check our estimate now and adjust
5592 the offset if necessary. */
5593 if (phdr_adjust_seg != NULL)
5597 for (count = 0, map = map_first; map != NULL; map = map->next)
5600 if (count > phdr_adjust_num)
5601 phdr_adjust_seg->p_paddr
5602 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5607 #undef IS_CONTAINED_BY_VMA
5608 #undef IS_CONTAINED_BY_LMA
5609 #undef IS_COREFILE_NOTE
5610 #undef IS_SOLARIS_PT_INTERP
5611 #undef INCLUDE_SECTION_IN_SEGMENT
5612 #undef SEGMENT_AFTER_SEGMENT
5613 #undef SEGMENT_OVERLAPS
5617 /* Initialize private output section information from input section. */
5620 _bfd_elf_init_private_section_data (bfd *ibfd,
5624 struct bfd_link_info *link_info)
5627 Elf_Internal_Shdr *ihdr, *ohdr;
5628 bfd_boolean need_group = link_info == NULL || link_info->relocatable;
5630 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5631 || obfd->xvec->flavour != bfd_target_elf_flavour)
5634 /* FIXME: What if the output ELF section type has been set to
5635 something different? */
5636 if (elf_section_type (osec) == SHT_NULL)
5637 elf_section_type (osec) = elf_section_type (isec);
5639 /* Set things up for objcopy and relocatable link. The output
5640 SHT_GROUP section will have its elf_next_in_group pointing back
5641 to the input group members. Ignore linker created group section.
5642 See elfNN_ia64_object_p in elfxx-ia64.c. */
5646 if (elf_sec_group (isec) == NULL
5647 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
5649 if (elf_section_flags (isec) & SHF_GROUP)
5650 elf_section_flags (osec) |= SHF_GROUP;
5651 elf_next_in_group (osec) = elf_next_in_group (isec);
5652 elf_group_name (osec) = elf_group_name (isec);
5656 ihdr = &elf_section_data (isec)->this_hdr;
5658 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
5659 don't use the output section of the linked-to section since it
5660 may be NULL at this point. */
5661 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
5663 ohdr = &elf_section_data (osec)->this_hdr;
5664 ohdr->sh_flags |= SHF_LINK_ORDER;
5665 elf_linked_to_section (osec) = elf_linked_to_section (isec);
5668 osec->use_rela_p = isec->use_rela_p;
5673 /* Copy private section information. This copies over the entsize
5674 field, and sometimes the info field. */
5677 _bfd_elf_copy_private_section_data (bfd *ibfd,
5682 Elf_Internal_Shdr *ihdr, *ohdr;
5684 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5685 || obfd->xvec->flavour != bfd_target_elf_flavour)
5688 ihdr = &elf_section_data (isec)->this_hdr;
5689 ohdr = &elf_section_data (osec)->this_hdr;
5691 ohdr->sh_entsize = ihdr->sh_entsize;
5693 if (ihdr->sh_type == SHT_SYMTAB
5694 || ihdr->sh_type == SHT_DYNSYM
5695 || ihdr->sh_type == SHT_GNU_verneed
5696 || ihdr->sh_type == SHT_GNU_verdef)
5697 ohdr->sh_info = ihdr->sh_info;
5699 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
5703 /* Copy private header information. */
5706 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
5708 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5709 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5712 /* Copy over private BFD data if it has not already been copied.
5713 This must be done here, rather than in the copy_private_bfd_data
5714 entry point, because the latter is called after the section
5715 contents have been set, which means that the program headers have
5716 already been worked out. */
5717 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5719 if (! copy_private_bfd_data (ibfd, obfd))
5726 /* Copy private symbol information. If this symbol is in a section
5727 which we did not map into a BFD section, try to map the section
5728 index correctly. We use special macro definitions for the mapped
5729 section indices; these definitions are interpreted by the
5730 swap_out_syms function. */
5732 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5733 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5734 #define MAP_STRTAB (SHN_HIOS + 3)
5735 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5736 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5739 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5744 elf_symbol_type *isym, *osym;
5746 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5747 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5750 isym = elf_symbol_from (ibfd, isymarg);
5751 osym = elf_symbol_from (obfd, osymarg);
5755 && bfd_is_abs_section (isym->symbol.section))
5759 shndx = isym->internal_elf_sym.st_shndx;
5760 if (shndx == elf_onesymtab (ibfd))
5761 shndx = MAP_ONESYMTAB;
5762 else if (shndx == elf_dynsymtab (ibfd))
5763 shndx = MAP_DYNSYMTAB;
5764 else if (shndx == elf_tdata (ibfd)->strtab_section)
5766 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5767 shndx = MAP_SHSTRTAB;
5768 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5769 shndx = MAP_SYM_SHNDX;
5770 osym->internal_elf_sym.st_shndx = shndx;
5776 /* Swap out the symbols. */
5779 swap_out_syms (bfd *abfd,
5780 struct bfd_strtab_hash **sttp,
5783 const struct elf_backend_data *bed;
5786 struct bfd_strtab_hash *stt;
5787 Elf_Internal_Shdr *symtab_hdr;
5788 Elf_Internal_Shdr *symtab_shndx_hdr;
5789 Elf_Internal_Shdr *symstrtab_hdr;
5790 bfd_byte *outbound_syms;
5791 bfd_byte *outbound_shndx;
5794 bfd_boolean name_local_sections;
5796 if (!elf_map_symbols (abfd))
5799 /* Dump out the symtabs. */
5800 stt = _bfd_elf_stringtab_init ();
5804 bed = get_elf_backend_data (abfd);
5805 symcount = bfd_get_symcount (abfd);
5806 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5807 symtab_hdr->sh_type = SHT_SYMTAB;
5808 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5809 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5810 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5811 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5813 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5814 symstrtab_hdr->sh_type = SHT_STRTAB;
5816 outbound_syms = bfd_alloc2 (abfd, 1 + symcount, bed->s->sizeof_sym);
5817 if (outbound_syms == NULL)
5819 _bfd_stringtab_free (stt);
5822 symtab_hdr->contents = outbound_syms;
5824 outbound_shndx = NULL;
5825 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5826 if (symtab_shndx_hdr->sh_name != 0)
5828 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5829 outbound_shndx = bfd_zalloc2 (abfd, 1 + symcount,
5830 sizeof (Elf_External_Sym_Shndx));
5831 if (outbound_shndx == NULL)
5833 _bfd_stringtab_free (stt);
5837 symtab_shndx_hdr->contents = outbound_shndx;
5838 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5839 symtab_shndx_hdr->sh_size = amt;
5840 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5841 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5844 /* Now generate the data (for "contents"). */
5846 /* Fill in zeroth symbol and swap it out. */
5847 Elf_Internal_Sym sym;
5853 sym.st_shndx = SHN_UNDEF;
5854 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5855 outbound_syms += bed->s->sizeof_sym;
5856 if (outbound_shndx != NULL)
5857 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5861 = (bed->elf_backend_name_local_section_symbols
5862 && bed->elf_backend_name_local_section_symbols (abfd));
5864 syms = bfd_get_outsymbols (abfd);
5865 for (idx = 0; idx < symcount; idx++)
5867 Elf_Internal_Sym sym;
5868 bfd_vma value = syms[idx]->value;
5869 elf_symbol_type *type_ptr;
5870 flagword flags = syms[idx]->flags;
5873 if (!name_local_sections
5874 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5876 /* Local section symbols have no name. */
5881 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5884 if (sym.st_name == (unsigned long) -1)
5886 _bfd_stringtab_free (stt);
5891 type_ptr = elf_symbol_from (abfd, syms[idx]);
5893 if ((flags & BSF_SECTION_SYM) == 0
5894 && bfd_is_com_section (syms[idx]->section))
5896 /* ELF common symbols put the alignment into the `value' field,
5897 and the size into the `size' field. This is backwards from
5898 how BFD handles it, so reverse it here. */
5899 sym.st_size = value;
5900 if (type_ptr == NULL
5901 || type_ptr->internal_elf_sym.st_value == 0)
5902 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5904 sym.st_value = type_ptr->internal_elf_sym.st_value;
5905 sym.st_shndx = _bfd_elf_section_from_bfd_section
5906 (abfd, syms[idx]->section);
5910 asection *sec = syms[idx]->section;
5913 if (sec->output_section)
5915 value += sec->output_offset;
5916 sec = sec->output_section;
5919 /* Don't add in the section vma for relocatable output. */
5920 if (! relocatable_p)
5922 sym.st_value = value;
5923 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5925 if (bfd_is_abs_section (sec)
5927 && type_ptr->internal_elf_sym.st_shndx != 0)
5929 /* This symbol is in a real ELF section which we did
5930 not create as a BFD section. Undo the mapping done
5931 by copy_private_symbol_data. */
5932 shndx = type_ptr->internal_elf_sym.st_shndx;
5936 shndx = elf_onesymtab (abfd);
5939 shndx = elf_dynsymtab (abfd);
5942 shndx = elf_tdata (abfd)->strtab_section;
5945 shndx = elf_tdata (abfd)->shstrtab_section;
5948 shndx = elf_tdata (abfd)->symtab_shndx_section;
5956 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5962 /* Writing this would be a hell of a lot easier if
5963 we had some decent documentation on bfd, and
5964 knew what to expect of the library, and what to
5965 demand of applications. For example, it
5966 appears that `objcopy' might not set the
5967 section of a symbol to be a section that is
5968 actually in the output file. */
5969 sec2 = bfd_get_section_by_name (abfd, sec->name);
5972 _bfd_error_handler (_("\
5973 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5974 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5976 bfd_set_error (bfd_error_invalid_operation);
5977 _bfd_stringtab_free (stt);
5981 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5982 BFD_ASSERT (shndx != -1);
5986 sym.st_shndx = shndx;
5989 if ((flags & BSF_THREAD_LOCAL) != 0)
5991 else if ((flags & BSF_FUNCTION) != 0)
5993 else if ((flags & BSF_OBJECT) != 0)
5998 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6001 /* Processor-specific types. */
6002 if (type_ptr != NULL
6003 && bed->elf_backend_get_symbol_type)
6004 type = ((*bed->elf_backend_get_symbol_type)
6005 (&type_ptr->internal_elf_sym, type));
6007 if (flags & BSF_SECTION_SYM)
6009 if (flags & BSF_GLOBAL)
6010 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6012 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6014 else if (bfd_is_com_section (syms[idx]->section))
6015 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6016 else if (bfd_is_und_section (syms[idx]->section))
6017 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6021 else if (flags & BSF_FILE)
6022 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6025 int bind = STB_LOCAL;
6027 if (flags & BSF_LOCAL)
6029 else if (flags & BSF_WEAK)
6031 else if (flags & BSF_GLOBAL)
6034 sym.st_info = ELF_ST_INFO (bind, type);
6037 if (type_ptr != NULL)
6038 sym.st_other = type_ptr->internal_elf_sym.st_other;
6042 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6043 outbound_syms += bed->s->sizeof_sym;
6044 if (outbound_shndx != NULL)
6045 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6049 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6050 symstrtab_hdr->sh_type = SHT_STRTAB;
6052 symstrtab_hdr->sh_flags = 0;
6053 symstrtab_hdr->sh_addr = 0;
6054 symstrtab_hdr->sh_entsize = 0;
6055 symstrtab_hdr->sh_link = 0;
6056 symstrtab_hdr->sh_info = 0;
6057 symstrtab_hdr->sh_addralign = 1;
6062 /* Return the number of bytes required to hold the symtab vector.
6064 Note that we base it on the count plus 1, since we will null terminate
6065 the vector allocated based on this size. However, the ELF symbol table
6066 always has a dummy entry as symbol #0, so it ends up even. */
6069 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6073 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6075 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6076 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6078 symtab_size -= sizeof (asymbol *);
6084 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6088 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6090 if (elf_dynsymtab (abfd) == 0)
6092 bfd_set_error (bfd_error_invalid_operation);
6096 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6097 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6099 symtab_size -= sizeof (asymbol *);
6105 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6108 return (asect->reloc_count + 1) * sizeof (arelent *);
6111 /* Canonicalize the relocs. */
6114 _bfd_elf_canonicalize_reloc (bfd *abfd,
6121 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6123 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6126 tblptr = section->relocation;
6127 for (i = 0; i < section->reloc_count; i++)
6128 *relptr++ = tblptr++;
6132 return section->reloc_count;
6136 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6138 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6139 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6142 bfd_get_symcount (abfd) = symcount;
6147 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6148 asymbol **allocation)
6150 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6151 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6154 bfd_get_dynamic_symcount (abfd) = symcount;
6158 /* Return the size required for the dynamic reloc entries. Any loadable
6159 section that was actually installed in the BFD, and has type SHT_REL
6160 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6161 dynamic reloc section. */
6164 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6169 if (elf_dynsymtab (abfd) == 0)
6171 bfd_set_error (bfd_error_invalid_operation);
6175 ret = sizeof (arelent *);
6176 for (s = abfd->sections; s != NULL; s = s->next)
6177 if ((s->flags & SEC_LOAD) != 0
6178 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6179 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6180 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6181 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6182 * sizeof (arelent *));
6187 /* Canonicalize the dynamic relocation entries. Note that we return the
6188 dynamic relocations as a single block, although they are actually
6189 associated with particular sections; the interface, which was
6190 designed for SunOS style shared libraries, expects that there is only
6191 one set of dynamic relocs. Any loadable section that was actually
6192 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6193 dynamic symbol table, is considered to be a dynamic reloc section. */
6196 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6200 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6204 if (elf_dynsymtab (abfd) == 0)
6206 bfd_set_error (bfd_error_invalid_operation);
6210 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6212 for (s = abfd->sections; s != NULL; s = s->next)
6214 if ((s->flags & SEC_LOAD) != 0
6215 && elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6216 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6217 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6222 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6224 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6226 for (i = 0; i < count; i++)
6237 /* Read in the version information. */
6240 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
6242 bfd_byte *contents = NULL;
6243 unsigned int freeidx = 0;
6245 if (elf_dynverref (abfd) != 0)
6247 Elf_Internal_Shdr *hdr;
6248 Elf_External_Verneed *everneed;
6249 Elf_Internal_Verneed *iverneed;
6251 bfd_byte *contents_end;
6253 hdr = &elf_tdata (abfd)->dynverref_hdr;
6255 elf_tdata (abfd)->verref = bfd_zalloc2 (abfd, hdr->sh_info,
6256 sizeof (Elf_Internal_Verneed));
6257 if (elf_tdata (abfd)->verref == NULL)
6260 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6262 contents = bfd_malloc (hdr->sh_size);
6263 if (contents == NULL)
6265 error_return_verref:
6266 elf_tdata (abfd)->verref = NULL;
6267 elf_tdata (abfd)->cverrefs = 0;
6270 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6271 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6272 goto error_return_verref;
6274 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
6275 goto error_return_verref;
6277 BFD_ASSERT (sizeof (Elf_External_Verneed)
6278 == sizeof (Elf_External_Vernaux));
6279 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
6280 everneed = (Elf_External_Verneed *) contents;
6281 iverneed = elf_tdata (abfd)->verref;
6282 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6284 Elf_External_Vernaux *evernaux;
6285 Elf_Internal_Vernaux *ivernaux;
6288 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6290 iverneed->vn_bfd = abfd;
6292 iverneed->vn_filename =
6293 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6295 if (iverneed->vn_filename == NULL)
6296 goto error_return_verref;
6298 if (iverneed->vn_cnt == 0)
6299 iverneed->vn_auxptr = NULL;
6302 iverneed->vn_auxptr = bfd_alloc2 (abfd, iverneed->vn_cnt,
6303 sizeof (Elf_Internal_Vernaux));
6304 if (iverneed->vn_auxptr == NULL)
6305 goto error_return_verref;
6308 if (iverneed->vn_aux
6309 > (size_t) (contents_end - (bfd_byte *) everneed))
6310 goto error_return_verref;
6312 evernaux = ((Elf_External_Vernaux *)
6313 ((bfd_byte *) everneed + iverneed->vn_aux));
6314 ivernaux = iverneed->vn_auxptr;
6315 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6317 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6319 ivernaux->vna_nodename =
6320 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6321 ivernaux->vna_name);
6322 if (ivernaux->vna_nodename == NULL)
6323 goto error_return_verref;
6325 if (j + 1 < iverneed->vn_cnt)
6326 ivernaux->vna_nextptr = ivernaux + 1;
6328 ivernaux->vna_nextptr = NULL;
6330 if (ivernaux->vna_next
6331 > (size_t) (contents_end - (bfd_byte *) evernaux))
6332 goto error_return_verref;
6334 evernaux = ((Elf_External_Vernaux *)
6335 ((bfd_byte *) evernaux + ivernaux->vna_next));
6337 if (ivernaux->vna_other > freeidx)
6338 freeidx = ivernaux->vna_other;
6341 if (i + 1 < hdr->sh_info)
6342 iverneed->vn_nextref = iverneed + 1;
6344 iverneed->vn_nextref = NULL;
6346 if (iverneed->vn_next
6347 > (size_t) (contents_end - (bfd_byte *) everneed))
6348 goto error_return_verref;
6350 everneed = ((Elf_External_Verneed *)
6351 ((bfd_byte *) everneed + iverneed->vn_next));
6358 if (elf_dynverdef (abfd) != 0)
6360 Elf_Internal_Shdr *hdr;
6361 Elf_External_Verdef *everdef;
6362 Elf_Internal_Verdef *iverdef;
6363 Elf_Internal_Verdef *iverdefarr;
6364 Elf_Internal_Verdef iverdefmem;
6366 unsigned int maxidx;
6367 bfd_byte *contents_end_def, *contents_end_aux;
6369 hdr = &elf_tdata (abfd)->dynverdef_hdr;
6371 contents = bfd_malloc (hdr->sh_size);
6372 if (contents == NULL)
6374 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6375 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
6378 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
6381 BFD_ASSERT (sizeof (Elf_External_Verdef)
6382 >= sizeof (Elf_External_Verdaux));
6383 contents_end_def = contents + hdr->sh_size
6384 - sizeof (Elf_External_Verdef);
6385 contents_end_aux = contents + hdr->sh_size
6386 - sizeof (Elf_External_Verdaux);
6388 /* We know the number of entries in the section but not the maximum
6389 index. Therefore we have to run through all entries and find
6391 everdef = (Elf_External_Verdef *) contents;
6393 for (i = 0; i < hdr->sh_info; ++i)
6395 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6397 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
6398 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
6400 if (iverdefmem.vd_next
6401 > (size_t) (contents_end_def - (bfd_byte *) everdef))
6404 everdef = ((Elf_External_Verdef *)
6405 ((bfd_byte *) everdef + iverdefmem.vd_next));
6408 if (default_imported_symver)
6410 if (freeidx > maxidx)
6415 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, maxidx,
6416 sizeof (Elf_Internal_Verdef));
6417 if (elf_tdata (abfd)->verdef == NULL)
6420 elf_tdata (abfd)->cverdefs = maxidx;
6422 everdef = (Elf_External_Verdef *) contents;
6423 iverdefarr = elf_tdata (abfd)->verdef;
6424 for (i = 0; i < hdr->sh_info; i++)
6426 Elf_External_Verdaux *everdaux;
6427 Elf_Internal_Verdaux *iverdaux;
6430 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
6432 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
6434 error_return_verdef:
6435 elf_tdata (abfd)->verdef = NULL;
6436 elf_tdata (abfd)->cverdefs = 0;
6440 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
6441 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
6443 iverdef->vd_bfd = abfd;
6445 if (iverdef->vd_cnt == 0)
6446 iverdef->vd_auxptr = NULL;
6449 iverdef->vd_auxptr = bfd_alloc2 (abfd, iverdef->vd_cnt,
6450 sizeof (Elf_Internal_Verdaux));
6451 if (iverdef->vd_auxptr == NULL)
6452 goto error_return_verdef;
6456 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
6457 goto error_return_verdef;
6459 everdaux = ((Elf_External_Verdaux *)
6460 ((bfd_byte *) everdef + iverdef->vd_aux));
6461 iverdaux = iverdef->vd_auxptr;
6462 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
6464 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
6466 iverdaux->vda_nodename =
6467 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6468 iverdaux->vda_name);
6469 if (iverdaux->vda_nodename == NULL)
6470 goto error_return_verdef;
6472 if (j + 1 < iverdef->vd_cnt)
6473 iverdaux->vda_nextptr = iverdaux + 1;
6475 iverdaux->vda_nextptr = NULL;
6477 if (iverdaux->vda_next
6478 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
6479 goto error_return_verdef;
6481 everdaux = ((Elf_External_Verdaux *)
6482 ((bfd_byte *) everdaux + iverdaux->vda_next));
6485 if (iverdef->vd_cnt)
6486 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
6488 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
6489 iverdef->vd_nextdef = iverdef + 1;
6491 iverdef->vd_nextdef = NULL;
6493 everdef = ((Elf_External_Verdef *)
6494 ((bfd_byte *) everdef + iverdef->vd_next));
6500 else if (default_imported_symver)
6507 elf_tdata (abfd)->verdef = bfd_zalloc2 (abfd, freeidx,
6508 sizeof (Elf_Internal_Verdef));
6509 if (elf_tdata (abfd)->verdef == NULL)
6512 elf_tdata (abfd)->cverdefs = freeidx;
6515 /* Create a default version based on the soname. */
6516 if (default_imported_symver)
6518 Elf_Internal_Verdef *iverdef;
6519 Elf_Internal_Verdaux *iverdaux;
6521 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
6523 iverdef->vd_version = VER_DEF_CURRENT;
6524 iverdef->vd_flags = 0;
6525 iverdef->vd_ndx = freeidx;
6526 iverdef->vd_cnt = 1;
6528 iverdef->vd_bfd = abfd;
6530 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
6531 if (iverdef->vd_nodename == NULL)
6532 goto error_return_verdef;
6533 iverdef->vd_nextdef = NULL;
6534 iverdef->vd_auxptr = bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
6535 if (iverdef->vd_auxptr == NULL)
6536 goto error_return_verdef;
6538 iverdaux = iverdef->vd_auxptr;
6539 iverdaux->vda_nodename = iverdef->vd_nodename;
6540 iverdaux->vda_nextptr = NULL;
6546 if (contents != NULL)
6552 _bfd_elf_make_empty_symbol (bfd *abfd)
6554 elf_symbol_type *newsym;
6555 bfd_size_type amt = sizeof (elf_symbol_type);
6557 newsym = bfd_zalloc (abfd, amt);
6562 newsym->symbol.the_bfd = abfd;
6563 return &newsym->symbol;
6568 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
6572 bfd_symbol_info (symbol, ret);
6575 /* Return whether a symbol name implies a local symbol. Most targets
6576 use this function for the is_local_label_name entry point, but some
6580 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
6583 /* Normal local symbols start with ``.L''. */
6584 if (name[0] == '.' && name[1] == 'L')
6587 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6588 DWARF debugging symbols starting with ``..''. */
6589 if (name[0] == '.' && name[1] == '.')
6592 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6593 emitting DWARF debugging output. I suspect this is actually a
6594 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6595 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6596 underscore to be emitted on some ELF targets). For ease of use,
6597 we treat such symbols as local. */
6598 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6605 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
6606 asymbol *symbol ATTRIBUTE_UNUSED)
6613 _bfd_elf_set_arch_mach (bfd *abfd,
6614 enum bfd_architecture arch,
6615 unsigned long machine)
6617 /* If this isn't the right architecture for this backend, and this
6618 isn't the generic backend, fail. */
6619 if (arch != get_elf_backend_data (abfd)->arch
6620 && arch != bfd_arch_unknown
6621 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6624 return bfd_default_set_arch_mach (abfd, arch, machine);
6627 /* Find the function to a particular section and offset,
6628 for error reporting. */
6631 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6635 const char **filename_ptr,
6636 const char **functionname_ptr)
6638 const char *filename;
6639 asymbol *func, *file;
6642 /* ??? Given multiple file symbols, it is impossible to reliably
6643 choose the right file name for global symbols. File symbols are
6644 local symbols, and thus all file symbols must sort before any
6645 global symbols. The ELF spec may be interpreted to say that a
6646 file symbol must sort before other local symbols, but currently
6647 ld -r doesn't do this. So, for ld -r output, it is possible to
6648 make a better choice of file name for local symbols by ignoring
6649 file symbols appearing after a given local symbol. */
6650 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
6656 state = nothing_seen;
6658 for (p = symbols; *p != NULL; p++)
6662 q = (elf_symbol_type *) *p;
6664 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6670 if (state == symbol_seen)
6671 state = file_after_symbol_seen;
6677 if (bfd_get_section (&q->symbol) == section
6678 && q->symbol.value >= low_func
6679 && q->symbol.value <= offset)
6681 func = (asymbol *) q;
6682 low_func = q->symbol.value;
6685 else if (ELF_ST_BIND (q->internal_elf_sym.st_info) != STB_LOCAL
6686 && state == file_after_symbol_seen)
6689 filename = bfd_asymbol_name (file);
6693 if (state == nothing_seen)
6694 state = symbol_seen;
6701 *filename_ptr = filename;
6702 if (functionname_ptr)
6703 *functionname_ptr = bfd_asymbol_name (func);
6708 /* Find the nearest line to a particular section and offset,
6709 for error reporting. */
6712 _bfd_elf_find_nearest_line (bfd *abfd,
6716 const char **filename_ptr,
6717 const char **functionname_ptr,
6718 unsigned int *line_ptr)
6722 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6723 filename_ptr, functionname_ptr,
6726 if (!*functionname_ptr)
6727 elf_find_function (abfd, section, symbols, offset,
6728 *filename_ptr ? NULL : filename_ptr,
6734 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6735 filename_ptr, functionname_ptr,
6737 &elf_tdata (abfd)->dwarf2_find_line_info))
6739 if (!*functionname_ptr)
6740 elf_find_function (abfd, section, symbols, offset,
6741 *filename_ptr ? NULL : filename_ptr,
6747 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6748 &found, filename_ptr,
6749 functionname_ptr, line_ptr,
6750 &elf_tdata (abfd)->line_info))
6752 if (found && (*functionname_ptr || *line_ptr))
6755 if (symbols == NULL)
6758 if (! elf_find_function (abfd, section, symbols, offset,
6759 filename_ptr, functionname_ptr))
6766 /* Find the line for a symbol. */
6769 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
6770 const char **filename_ptr, unsigned int *line_ptr)
6772 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
6773 filename_ptr, line_ptr, 0,
6774 &elf_tdata (abfd)->dwarf2_find_line_info);
6777 /* After a call to bfd_find_nearest_line, successive calls to
6778 bfd_find_inliner_info can be used to get source information about
6779 each level of function inlining that terminated at the address
6780 passed to bfd_find_nearest_line. Currently this is only supported
6781 for DWARF2 with appropriate DWARF3 extensions. */
6784 _bfd_elf_find_inliner_info (bfd *abfd,
6785 const char **filename_ptr,
6786 const char **functionname_ptr,
6787 unsigned int *line_ptr)
6790 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
6791 functionname_ptr, line_ptr,
6792 & elf_tdata (abfd)->dwarf2_find_line_info);
6797 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6801 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6803 ret += get_program_header_size (abfd);
6808 _bfd_elf_set_section_contents (bfd *abfd,
6810 const void *location,
6812 bfd_size_type count)
6814 Elf_Internal_Shdr *hdr;
6817 if (! abfd->output_has_begun
6818 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6821 hdr = &elf_section_data (section)->this_hdr;
6822 pos = hdr->sh_offset + offset;
6823 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6824 || bfd_bwrite (location, count, abfd) != count)
6831 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6832 arelent *cache_ptr ATTRIBUTE_UNUSED,
6833 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6838 /* Try to convert a non-ELF reloc into an ELF one. */
6841 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6843 /* Check whether we really have an ELF howto. */
6845 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6847 bfd_reloc_code_real_type code;
6848 reloc_howto_type *howto;
6850 /* Alien reloc: Try to determine its type to replace it with an
6851 equivalent ELF reloc. */
6853 if (areloc->howto->pc_relative)
6855 switch (areloc->howto->bitsize)
6858 code = BFD_RELOC_8_PCREL;
6861 code = BFD_RELOC_12_PCREL;
6864 code = BFD_RELOC_16_PCREL;
6867 code = BFD_RELOC_24_PCREL;
6870 code = BFD_RELOC_32_PCREL;
6873 code = BFD_RELOC_64_PCREL;
6879 howto = bfd_reloc_type_lookup (abfd, code);
6881 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6883 if (howto->pcrel_offset)
6884 areloc->addend += areloc->address;
6886 areloc->addend -= areloc->address; /* addend is unsigned!! */
6891 switch (areloc->howto->bitsize)
6897 code = BFD_RELOC_14;
6900 code = BFD_RELOC_16;
6903 code = BFD_RELOC_26;
6906 code = BFD_RELOC_32;
6909 code = BFD_RELOC_64;
6915 howto = bfd_reloc_type_lookup (abfd, code);
6919 areloc->howto = howto;
6927 (*_bfd_error_handler)
6928 (_("%B: unsupported relocation type %s"),
6929 abfd, areloc->howto->name);
6930 bfd_set_error (bfd_error_bad_value);
6935 _bfd_elf_close_and_cleanup (bfd *abfd)
6937 if (bfd_get_format (abfd) == bfd_object)
6939 if (elf_shstrtab (abfd) != NULL)
6940 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6941 _bfd_dwarf2_cleanup_debug_info (abfd);
6944 return _bfd_generic_close_and_cleanup (abfd);
6947 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6948 in the relocation's offset. Thus we cannot allow any sort of sanity
6949 range-checking to interfere. There is nothing else to do in processing
6952 bfd_reloc_status_type
6953 _bfd_elf_rel_vtable_reloc_fn
6954 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6955 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6956 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6957 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6959 return bfd_reloc_ok;
6962 /* Elf core file support. Much of this only works on native
6963 toolchains, since we rely on knowing the
6964 machine-dependent procfs structure in order to pick
6965 out details about the corefile. */
6967 #ifdef HAVE_SYS_PROCFS_H
6968 # include <sys/procfs.h>
6971 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6974 elfcore_make_pid (bfd *abfd)
6976 return ((elf_tdata (abfd)->core_lwpid << 16)
6977 + (elf_tdata (abfd)->core_pid));
6980 /* If there isn't a section called NAME, make one, using
6981 data from SECT. Note, this function will generate a
6982 reference to NAME, so you shouldn't deallocate or
6986 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6990 if (bfd_get_section_by_name (abfd, name) != NULL)
6993 sect2 = bfd_make_section (abfd, name);
6997 sect2->size = sect->size;
6998 sect2->filepos = sect->filepos;
6999 sect2->flags = sect->flags;
7000 sect2->alignment_power = sect->alignment_power;
7004 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7005 actually creates up to two pseudosections:
7006 - For the single-threaded case, a section named NAME, unless
7007 such a section already exists.
7008 - For the multi-threaded case, a section named "NAME/PID", where
7009 PID is elfcore_make_pid (abfd).
7010 Both pseudosections have identical contents. */
7012 _bfd_elfcore_make_pseudosection (bfd *abfd,
7018 char *threaded_name;
7022 /* Build the section name. */
7024 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7025 len = strlen (buf) + 1;
7026 threaded_name = bfd_alloc (abfd, len);
7027 if (threaded_name == NULL)
7029 memcpy (threaded_name, buf, len);
7031 sect = bfd_make_section_anyway (abfd, threaded_name);
7035 sect->filepos = filepos;
7036 sect->flags = SEC_HAS_CONTENTS;
7037 sect->alignment_power = 2;
7039 return elfcore_maybe_make_sect (abfd, name, sect);
7042 /* prstatus_t exists on:
7044 linux 2.[01] + glibc
7048 #if defined (HAVE_PRSTATUS_T)
7051 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7056 if (note->descsz == sizeof (prstatus_t))
7060 size = sizeof (prstat.pr_reg);
7061 offset = offsetof (prstatus_t, pr_reg);
7062 memcpy (&prstat, note->descdata, sizeof (prstat));
7064 /* Do not overwrite the core signal if it
7065 has already been set by another thread. */
7066 if (elf_tdata (abfd)->core_signal == 0)
7067 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7068 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7070 /* pr_who exists on:
7073 pr_who doesn't exist on:
7076 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7077 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7080 #if defined (HAVE_PRSTATUS32_T)
7081 else if (note->descsz == sizeof (prstatus32_t))
7083 /* 64-bit host, 32-bit corefile */
7084 prstatus32_t prstat;
7086 size = sizeof (prstat.pr_reg);
7087 offset = offsetof (prstatus32_t, pr_reg);
7088 memcpy (&prstat, note->descdata, sizeof (prstat));
7090 /* Do not overwrite the core signal if it
7091 has already been set by another thread. */
7092 if (elf_tdata (abfd)->core_signal == 0)
7093 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7094 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7096 /* pr_who exists on:
7099 pr_who doesn't exist on:
7102 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7103 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7106 #endif /* HAVE_PRSTATUS32_T */
7109 /* Fail - we don't know how to handle any other
7110 note size (ie. data object type). */
7114 /* Make a ".reg/999" section and a ".reg" section. */
7115 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7116 size, note->descpos + offset);
7118 #endif /* defined (HAVE_PRSTATUS_T) */
7120 /* Create a pseudosection containing the exact contents of NOTE. */
7122 elfcore_make_note_pseudosection (bfd *abfd,
7124 Elf_Internal_Note *note)
7126 return _bfd_elfcore_make_pseudosection (abfd, name,
7127 note->descsz, note->descpos);
7130 /* There isn't a consistent prfpregset_t across platforms,
7131 but it doesn't matter, because we don't have to pick this
7132 data structure apart. */
7135 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7137 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7140 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7141 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7145 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7147 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7150 #if defined (HAVE_PRPSINFO_T)
7151 typedef prpsinfo_t elfcore_psinfo_t;
7152 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7153 typedef prpsinfo32_t elfcore_psinfo32_t;
7157 #if defined (HAVE_PSINFO_T)
7158 typedef psinfo_t elfcore_psinfo_t;
7159 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7160 typedef psinfo32_t elfcore_psinfo32_t;
7164 /* return a malloc'ed copy of a string at START which is at
7165 most MAX bytes long, possibly without a terminating '\0'.
7166 the copy will always have a terminating '\0'. */
7169 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
7172 char *end = memchr (start, '\0', max);
7180 dups = bfd_alloc (abfd, len + 1);
7184 memcpy (dups, start, len);
7190 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7192 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
7194 if (note->descsz == sizeof (elfcore_psinfo_t))
7196 elfcore_psinfo_t psinfo;
7198 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7200 elf_tdata (abfd)->core_program
7201 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7202 sizeof (psinfo.pr_fname));
7204 elf_tdata (abfd)->core_command
7205 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7206 sizeof (psinfo.pr_psargs));
7208 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7209 else if (note->descsz == sizeof (elfcore_psinfo32_t))
7211 /* 64-bit host, 32-bit corefile */
7212 elfcore_psinfo32_t psinfo;
7214 memcpy (&psinfo, note->descdata, sizeof (psinfo));
7216 elf_tdata (abfd)->core_program
7217 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
7218 sizeof (psinfo.pr_fname));
7220 elf_tdata (abfd)->core_command
7221 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
7222 sizeof (psinfo.pr_psargs));
7228 /* Fail - we don't know how to handle any other
7229 note size (ie. data object type). */
7233 /* Note that for some reason, a spurious space is tacked
7234 onto the end of the args in some (at least one anyway)
7235 implementations, so strip it off if it exists. */
7238 char *command = elf_tdata (abfd)->core_command;
7239 int n = strlen (command);
7241 if (0 < n && command[n - 1] == ' ')
7242 command[n - 1] = '\0';
7247 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7249 #if defined (HAVE_PSTATUS_T)
7251 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
7253 if (note->descsz == sizeof (pstatus_t)
7254 #if defined (HAVE_PXSTATUS_T)
7255 || note->descsz == sizeof (pxstatus_t)
7261 memcpy (&pstat, note->descdata, sizeof (pstat));
7263 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7265 #if defined (HAVE_PSTATUS32_T)
7266 else if (note->descsz == sizeof (pstatus32_t))
7268 /* 64-bit host, 32-bit corefile */
7271 memcpy (&pstat, note->descdata, sizeof (pstat));
7273 elf_tdata (abfd)->core_pid = pstat.pr_pid;
7276 /* Could grab some more details from the "representative"
7277 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7278 NT_LWPSTATUS note, presumably. */
7282 #endif /* defined (HAVE_PSTATUS_T) */
7284 #if defined (HAVE_LWPSTATUS_T)
7286 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
7288 lwpstatus_t lwpstat;
7294 if (note->descsz != sizeof (lwpstat)
7295 #if defined (HAVE_LWPXSTATUS_T)
7296 && note->descsz != sizeof (lwpxstatus_t)
7301 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
7303 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
7304 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
7306 /* Make a ".reg/999" section. */
7308 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
7309 len = strlen (buf) + 1;
7310 name = bfd_alloc (abfd, len);
7313 memcpy (name, buf, len);
7315 sect = bfd_make_section_anyway (abfd, name);
7319 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7320 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
7321 sect->filepos = note->descpos
7322 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
7325 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7326 sect->size = sizeof (lwpstat.pr_reg);
7327 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
7330 sect->flags = SEC_HAS_CONTENTS;
7331 sect->alignment_power = 2;
7333 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
7336 /* Make a ".reg2/999" section */
7338 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
7339 len = strlen (buf) + 1;
7340 name = bfd_alloc (abfd, len);
7343 memcpy (name, buf, len);
7345 sect = bfd_make_section_anyway (abfd, name);
7349 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7350 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
7351 sect->filepos = note->descpos
7352 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
7355 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7356 sect->size = sizeof (lwpstat.pr_fpreg);
7357 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
7360 sect->flags = SEC_HAS_CONTENTS;
7361 sect->alignment_power = 2;
7363 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
7365 #endif /* defined (HAVE_LWPSTATUS_T) */
7367 #if defined (HAVE_WIN32_PSTATUS_T)
7369 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
7375 win32_pstatus_t pstatus;
7377 if (note->descsz < sizeof (pstatus))
7380 memcpy (&pstatus, note->descdata, sizeof (pstatus));
7382 switch (pstatus.data_type)
7384 case NOTE_INFO_PROCESS:
7385 /* FIXME: need to add ->core_command. */
7386 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
7387 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
7390 case NOTE_INFO_THREAD:
7391 /* Make a ".reg/999" section. */
7392 sprintf (buf, ".reg/%ld", (long) pstatus.data.thread_info.tid);
7394 len = strlen (buf) + 1;
7395 name = bfd_alloc (abfd, len);
7399 memcpy (name, buf, len);
7401 sect = bfd_make_section_anyway (abfd, name);
7405 sect->size = sizeof (pstatus.data.thread_info.thread_context);
7406 sect->filepos = (note->descpos
7407 + offsetof (struct win32_pstatus,
7408 data.thread_info.thread_context));
7409 sect->flags = SEC_HAS_CONTENTS;
7410 sect->alignment_power = 2;
7412 if (pstatus.data.thread_info.is_active_thread)
7413 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
7417 case NOTE_INFO_MODULE:
7418 /* Make a ".module/xxxxxxxx" section. */
7419 sprintf (buf, ".module/%08lx",
7420 (long) pstatus.data.module_info.base_address);
7422 len = strlen (buf) + 1;
7423 name = bfd_alloc (abfd, len);
7427 memcpy (name, buf, len);
7429 sect = bfd_make_section_anyway (abfd, name);
7434 sect->size = note->descsz;
7435 sect->filepos = note->descpos;
7436 sect->flags = SEC_HAS_CONTENTS;
7437 sect->alignment_power = 2;
7446 #endif /* HAVE_WIN32_PSTATUS_T */
7449 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
7451 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7459 if (bed->elf_backend_grok_prstatus)
7460 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7462 #if defined (HAVE_PRSTATUS_T)
7463 return elfcore_grok_prstatus (abfd, note);
7468 #if defined (HAVE_PSTATUS_T)
7470 return elfcore_grok_pstatus (abfd, note);
7473 #if defined (HAVE_LWPSTATUS_T)
7475 return elfcore_grok_lwpstatus (abfd, note);
7478 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7479 return elfcore_grok_prfpreg (abfd, note);
7481 #if defined (HAVE_WIN32_PSTATUS_T)
7482 case NT_WIN32PSTATUS:
7483 return elfcore_grok_win32pstatus (abfd, note);
7486 case NT_PRXFPREG: /* Linux SSE extension */
7487 if (note->namesz == 6
7488 && strcmp (note->namedata, "LINUX") == 0)
7489 return elfcore_grok_prxfpreg (abfd, note);
7495 if (bed->elf_backend_grok_psinfo)
7496 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7498 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7499 return elfcore_grok_psinfo (abfd, note);
7506 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
7510 sect->size = note->descsz;
7511 sect->filepos = note->descpos;
7512 sect->flags = SEC_HAS_CONTENTS;
7513 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7521 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
7525 cp = strchr (note->namedata, '@');
7528 *lwpidp = atoi(cp + 1);
7535 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
7538 /* Signal number at offset 0x08. */
7539 elf_tdata (abfd)->core_signal
7540 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7542 /* Process ID at offset 0x50. */
7543 elf_tdata (abfd)->core_pid
7544 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7546 /* Command name at 0x7c (max 32 bytes, including nul). */
7547 elf_tdata (abfd)->core_command
7548 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7550 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
7555 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
7559 if (elfcore_netbsd_get_lwpid (note, &lwp))
7560 elf_tdata (abfd)->core_lwpid = lwp;
7562 if (note->type == NT_NETBSDCORE_PROCINFO)
7564 /* NetBSD-specific core "procinfo". Note that we expect to
7565 find this note before any of the others, which is fine,
7566 since the kernel writes this note out first when it
7567 creates a core file. */
7569 return elfcore_grok_netbsd_procinfo (abfd, note);
7572 /* As of Jan 2002 there are no other machine-independent notes
7573 defined for NetBSD core files. If the note type is less
7574 than the start of the machine-dependent note types, we don't
7577 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7581 switch (bfd_get_arch (abfd))
7583 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7584 PT_GETFPREGS == mach+2. */
7586 case bfd_arch_alpha:
7587 case bfd_arch_sparc:
7590 case NT_NETBSDCORE_FIRSTMACH+0:
7591 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7593 case NT_NETBSDCORE_FIRSTMACH+2:
7594 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7600 /* On all other arch's, PT_GETREGS == mach+1 and
7601 PT_GETFPREGS == mach+3. */
7606 case NT_NETBSDCORE_FIRSTMACH+1:
7607 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7609 case NT_NETBSDCORE_FIRSTMACH+3:
7610 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7620 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
7622 void *ddata = note->descdata;
7629 /* nto_procfs_status 'pid' field is at offset 0. */
7630 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7632 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7633 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7635 /* nto_procfs_status 'flags' field is at offset 8. */
7636 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7638 /* nto_procfs_status 'what' field is at offset 14. */
7639 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7641 elf_tdata (abfd)->core_signal = sig;
7642 elf_tdata (abfd)->core_lwpid = *tid;
7645 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7646 do not come from signals so we make sure we set the current
7647 thread just in case. */
7648 if (flags & 0x00000080)
7649 elf_tdata (abfd)->core_lwpid = *tid;
7651 /* Make a ".qnx_core_status/%d" section. */
7652 sprintf (buf, ".qnx_core_status/%ld", (long) *tid);
7654 name = bfd_alloc (abfd, strlen (buf) + 1);
7659 sect = bfd_make_section_anyway (abfd, name);
7663 sect->size = note->descsz;
7664 sect->filepos = note->descpos;
7665 sect->flags = SEC_HAS_CONTENTS;
7666 sect->alignment_power = 2;
7668 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7672 elfcore_grok_nto_regs (bfd *abfd,
7673 Elf_Internal_Note *note,
7681 /* Make a "(base)/%d" section. */
7682 sprintf (buf, "%s/%ld", base, (long) tid);
7684 name = bfd_alloc (abfd, strlen (buf) + 1);
7689 sect = bfd_make_section_anyway (abfd, name);
7693 sect->size = note->descsz;
7694 sect->filepos = note->descpos;
7695 sect->flags = SEC_HAS_CONTENTS;
7696 sect->alignment_power = 2;
7698 /* This is the current thread. */
7699 if (elf_tdata (abfd)->core_lwpid == tid)
7700 return elfcore_maybe_make_sect (abfd, base, sect);
7705 #define BFD_QNT_CORE_INFO 7
7706 #define BFD_QNT_CORE_STATUS 8
7707 #define BFD_QNT_CORE_GREG 9
7708 #define BFD_QNT_CORE_FPREG 10
7711 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7713 /* Every GREG section has a STATUS section before it. Store the
7714 tid from the previous call to pass down to the next gregs
7716 static pid_t tid = 1;
7720 case BFD_QNT_CORE_INFO:
7721 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7722 case BFD_QNT_CORE_STATUS:
7723 return elfcore_grok_nto_status (abfd, note, &tid);
7724 case BFD_QNT_CORE_GREG:
7725 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
7726 case BFD_QNT_CORE_FPREG:
7727 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
7733 /* Function: elfcore_write_note
7740 size of data for note
7743 End of buffer containing note. */
7746 elfcore_write_note (bfd *abfd,
7754 Elf_External_Note *xnp;
7764 const struct elf_backend_data *bed;
7766 namesz = strlen (name) + 1;
7767 bed = get_elf_backend_data (abfd);
7768 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7771 newspace = 12 + namesz + pad + size;
7773 p = realloc (buf, *bufsiz + newspace);
7775 *bufsiz += newspace;
7776 xnp = (Elf_External_Note *) dest;
7777 H_PUT_32 (abfd, namesz, xnp->namesz);
7778 H_PUT_32 (abfd, size, xnp->descsz);
7779 H_PUT_32 (abfd, type, xnp->type);
7783 memcpy (dest, name, namesz);
7791 memcpy (dest, input, size);
7795 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7797 elfcore_write_prpsinfo (bfd *abfd,
7804 char *note_name = "CORE";
7806 #if defined (HAVE_PSINFO_T)
7808 note_type = NT_PSINFO;
7811 note_type = NT_PRPSINFO;
7814 memset (&data, 0, sizeof (data));
7815 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7816 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7817 return elfcore_write_note (abfd, buf, bufsiz,
7818 note_name, note_type, &data, sizeof (data));
7820 #endif /* PSINFO_T or PRPSINFO_T */
7822 #if defined (HAVE_PRSTATUS_T)
7824 elfcore_write_prstatus (bfd *abfd,
7832 char *note_name = "CORE";
7834 memset (&prstat, 0, sizeof (prstat));
7835 prstat.pr_pid = pid;
7836 prstat.pr_cursig = cursig;
7837 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7838 return elfcore_write_note (abfd, buf, bufsiz,
7839 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7841 #endif /* HAVE_PRSTATUS_T */
7843 #if defined (HAVE_LWPSTATUS_T)
7845 elfcore_write_lwpstatus (bfd *abfd,
7852 lwpstatus_t lwpstat;
7853 char *note_name = "CORE";
7855 memset (&lwpstat, 0, sizeof (lwpstat));
7856 lwpstat.pr_lwpid = pid >> 16;
7857 lwpstat.pr_cursig = cursig;
7858 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7859 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7860 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7862 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7863 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7865 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7866 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7869 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7870 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7872 #endif /* HAVE_LWPSTATUS_T */
7874 #if defined (HAVE_PSTATUS_T)
7876 elfcore_write_pstatus (bfd *abfd,
7884 char *note_name = "CORE";
7886 memset (&pstat, 0, sizeof (pstat));
7887 pstat.pr_pid = pid & 0xffff;
7888 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7889 NT_PSTATUS, &pstat, sizeof (pstat));
7892 #endif /* HAVE_PSTATUS_T */
7895 elfcore_write_prfpreg (bfd *abfd,
7901 char *note_name = "CORE";
7902 return elfcore_write_note (abfd, buf, bufsiz,
7903 note_name, NT_FPREGSET, fpregs, size);
7907 elfcore_write_prxfpreg (bfd *abfd,
7910 const void *xfpregs,
7913 char *note_name = "LINUX";
7914 return elfcore_write_note (abfd, buf, bufsiz,
7915 note_name, NT_PRXFPREG, xfpregs, size);
7919 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7927 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7930 buf = bfd_malloc (size);
7934 if (bfd_bread (buf, size, abfd) != size)
7942 while (p < buf + size)
7944 /* FIXME: bad alignment assumption. */
7945 Elf_External_Note *xnp = (Elf_External_Note *) p;
7946 Elf_Internal_Note in;
7948 in.type = H_GET_32 (abfd, xnp->type);
7950 in.namesz = H_GET_32 (abfd, xnp->namesz);
7951 in.namedata = xnp->name;
7953 in.descsz = H_GET_32 (abfd, xnp->descsz);
7954 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7955 in.descpos = offset + (in.descdata - buf);
7957 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7959 if (! elfcore_grok_netbsd_note (abfd, &in))
7962 else if (strncmp (in.namedata, "QNX", 3) == 0)
7964 if (! elfcore_grok_nto_note (abfd, &in))
7969 if (! elfcore_grok_note (abfd, &in))
7973 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7980 /* Providing external access to the ELF program header table. */
7982 /* Return an upper bound on the number of bytes required to store a
7983 copy of ABFD's program header table entries. Return -1 if an error
7984 occurs; bfd_get_error will return an appropriate code. */
7987 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7989 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7991 bfd_set_error (bfd_error_wrong_format);
7995 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7998 /* Copy ABFD's program header table entries to *PHDRS. The entries
7999 will be stored as an array of Elf_Internal_Phdr structures, as
8000 defined in include/elf/internal.h. To find out how large the
8001 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
8003 Return the number of program header table entries read, or -1 if an
8004 error occurs; bfd_get_error will return an appropriate code. */
8007 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
8011 if (abfd->xvec->flavour != bfd_target_elf_flavour)
8013 bfd_set_error (bfd_error_wrong_format);
8017 num_phdrs = elf_elfheader (abfd)->e_phnum;
8018 memcpy (phdrs, elf_tdata (abfd)->phdr,
8019 num_phdrs * sizeof (Elf_Internal_Phdr));
8025 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
8028 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8030 i_ehdrp = elf_elfheader (abfd);
8031 if (i_ehdrp == NULL)
8032 sprintf_vma (buf, value);
8035 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8037 #if BFD_HOST_64BIT_LONG
8038 sprintf (buf, "%016lx", value);
8040 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
8041 _bfd_int64_low (value));
8045 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
8048 sprintf_vma (buf, value);
8053 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
8056 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
8058 i_ehdrp = elf_elfheader (abfd);
8059 if (i_ehdrp == NULL)
8060 fprintf_vma ((FILE *) stream, value);
8063 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
8065 #if BFD_HOST_64BIT_LONG
8066 fprintf ((FILE *) stream, "%016lx", value);
8068 fprintf ((FILE *) stream, "%08lx%08lx",
8069 _bfd_int64_high (value), _bfd_int64_low (value));
8073 fprintf ((FILE *) stream, "%08lx",
8074 (unsigned long) (value & 0xffffffff));
8077 fprintf_vma ((FILE *) stream, value);
8081 enum elf_reloc_type_class
8082 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
8084 return reloc_class_normal;
8087 /* For RELA architectures, return the relocation value for a
8088 relocation against a local symbol. */
8091 _bfd_elf_rela_local_sym (bfd *abfd,
8092 Elf_Internal_Sym *sym,
8094 Elf_Internal_Rela *rel)
8096 asection *sec = *psec;
8099 relocation = (sec->output_section->vma
8100 + sec->output_offset
8102 if ((sec->flags & SEC_MERGE)
8103 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
8104 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
8107 _bfd_merged_section_offset (abfd, psec,
8108 elf_section_data (sec)->sec_info,
8109 sym->st_value + rel->r_addend);
8112 /* If we have changed the section, and our original section is
8113 marked with SEC_EXCLUDE, it means that the original
8114 SEC_MERGE section has been completely subsumed in some
8115 other SEC_MERGE section. In this case, we need to leave
8116 some info around for --emit-relocs. */
8117 if ((sec->flags & SEC_EXCLUDE) != 0)
8118 sec->kept_section = *psec;
8121 rel->r_addend -= relocation;
8122 rel->r_addend += sec->output_section->vma + sec->output_offset;
8128 _bfd_elf_rel_local_sym (bfd *abfd,
8129 Elf_Internal_Sym *sym,
8133 asection *sec = *psec;
8135 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
8136 return sym->st_value + addend;
8138 return _bfd_merged_section_offset (abfd, psec,
8139 elf_section_data (sec)->sec_info,
8140 sym->st_value + addend);
8144 _bfd_elf_section_offset (bfd *abfd,
8145 struct bfd_link_info *info,
8149 switch (sec->sec_info_type)
8151 case ELF_INFO_TYPE_STABS:
8152 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
8154 case ELF_INFO_TYPE_EH_FRAME:
8155 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
8161 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8162 reconstruct an ELF file by reading the segments out of remote memory
8163 based on the ELF file header at EHDR_VMA and the ELF program headers it
8164 points to. If not null, *LOADBASEP is filled in with the difference
8165 between the VMAs from which the segments were read, and the VMAs the
8166 file headers (and hence BFD's idea of each section's VMA) put them at.
8168 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8169 remote memory at target address VMA into the local buffer at MYADDR; it
8170 should return zero on success or an `errno' code on failure. TEMPL must
8171 be a BFD for an ELF target with the word size and byte order found in
8172 the remote memory. */
8175 bfd_elf_bfd_from_remote_memory
8179 int (*target_read_memory) (bfd_vma, bfd_byte *, int))
8181 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
8182 (templ, ehdr_vma, loadbasep, target_read_memory);
8186 _bfd_elf_get_synthetic_symtab (bfd *abfd,
8187 long symcount ATTRIBUTE_UNUSED,
8188 asymbol **syms ATTRIBUTE_UNUSED,
8193 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8196 const char *relplt_name;
8197 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
8201 Elf_Internal_Shdr *hdr;
8207 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
8210 if (dynsymcount <= 0)
8213 if (!bed->plt_sym_val)
8216 relplt_name = bed->relplt_name;
8217 if (relplt_name == NULL)
8218 relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
8219 relplt = bfd_get_section_by_name (abfd, relplt_name);
8223 hdr = &elf_section_data (relplt)->this_hdr;
8224 if (hdr->sh_link != elf_dynsymtab (abfd)
8225 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
8228 plt = bfd_get_section_by_name (abfd, ".plt");
8232 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
8233 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
8236 count = relplt->size / hdr->sh_entsize;
8237 size = count * sizeof (asymbol);
8238 p = relplt->relocation;
8239 for (i = 0; i < count; i++, s++, p++)
8240 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
8242 s = *ret = bfd_malloc (size);
8246 names = (char *) (s + count);
8247 p = relplt->relocation;
8249 for (i = 0; i < count; i++, s++, p++)
8254 addr = bed->plt_sym_val (i, plt, p);
8255 if (addr == (bfd_vma) -1)
8258 *s = **p->sym_ptr_ptr;
8259 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
8260 we are defining a symbol, ensure one of them is set. */
8261 if ((s->flags & BSF_LOCAL) == 0)
8262 s->flags |= BSF_GLOBAL;
8264 s->value = addr - plt->vma;
8266 len = strlen ((*p->sym_ptr_ptr)->name);
8267 memcpy (names, (*p->sym_ptr_ptr)->name, len);
8269 memcpy (names, "@plt", sizeof ("@plt"));
8270 names += sizeof ("@plt");
8277 /* Sort symbol by binding and section. We want to put definitions
8278 sorted by section at the beginning. */
8281 elf_sort_elf_symbol (const void *arg1, const void *arg2)
8283 const Elf_Internal_Sym *s1;
8284 const Elf_Internal_Sym *s2;
8287 /* Make sure that undefined symbols are at the end. */
8288 s1 = (const Elf_Internal_Sym *) arg1;
8289 if (s1->st_shndx == SHN_UNDEF)
8291 s2 = (const Elf_Internal_Sym *) arg2;
8292 if (s2->st_shndx == SHN_UNDEF)
8295 /* Sorted by section index. */
8296 shndx = s1->st_shndx - s2->st_shndx;
8300 /* Sorted by binding. */
8301 return ELF_ST_BIND (s1->st_info) - ELF_ST_BIND (s2->st_info);
8306 Elf_Internal_Sym *sym;
8311 elf_sym_name_compare (const void *arg1, const void *arg2)
8313 const struct elf_symbol *s1 = (const struct elf_symbol *) arg1;
8314 const struct elf_symbol *s2 = (const struct elf_symbol *) arg2;
8315 return strcmp (s1->name, s2->name);
8318 /* Check if 2 sections define the same set of local and global
8322 bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2)
8325 const struct elf_backend_data *bed1, *bed2;
8326 Elf_Internal_Shdr *hdr1, *hdr2;
8327 bfd_size_type symcount1, symcount2;
8328 Elf_Internal_Sym *isymbuf1, *isymbuf2;
8329 Elf_Internal_Sym *isymstart1 = NULL, *isymstart2 = NULL, *isym;
8330 Elf_Internal_Sym *isymend;
8331 struct elf_symbol *symp, *symtable1 = NULL, *symtable2 = NULL;
8332 bfd_size_type count1, count2, i;
8339 /* If both are .gnu.linkonce sections, they have to have the same
8341 if (strncmp (sec1->name, ".gnu.linkonce",
8342 sizeof ".gnu.linkonce" - 1) == 0
8343 && strncmp (sec2->name, ".gnu.linkonce",
8344 sizeof ".gnu.linkonce" - 1) == 0)
8345 return strcmp (sec1->name + sizeof ".gnu.linkonce",
8346 sec2->name + sizeof ".gnu.linkonce") == 0;
8348 /* Both sections have to be in ELF. */
8349 if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour
8350 || bfd_get_flavour (bfd2) != bfd_target_elf_flavour)
8353 if (elf_section_type (sec1) != elf_section_type (sec2))
8356 if ((elf_section_flags (sec1) & SHF_GROUP) != 0
8357 && (elf_section_flags (sec2) & SHF_GROUP) != 0)
8359 /* If both are members of section groups, they have to have the
8361 if (strcmp (elf_group_name (sec1), elf_group_name (sec2)) != 0)
8365 shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1);
8366 shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2);
8367 if (shndx1 == -1 || shndx2 == -1)
8370 bed1 = get_elf_backend_data (bfd1);
8371 bed2 = get_elf_backend_data (bfd2);
8372 hdr1 = &elf_tdata (bfd1)->symtab_hdr;
8373 symcount1 = hdr1->sh_size / bed1->s->sizeof_sym;
8374 hdr2 = &elf_tdata (bfd2)->symtab_hdr;
8375 symcount2 = hdr2->sh_size / bed2->s->sizeof_sym;
8377 if (symcount1 == 0 || symcount2 == 0)
8380 isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0,
8382 isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0,
8386 if (isymbuf1 == NULL || isymbuf2 == NULL)
8389 /* Sort symbols by binding and section. Global definitions are at
8391 qsort (isymbuf1, symcount1, sizeof (Elf_Internal_Sym),
8392 elf_sort_elf_symbol);
8393 qsort (isymbuf2, symcount2, sizeof (Elf_Internal_Sym),
8394 elf_sort_elf_symbol);
8396 /* Count definitions in the section. */
8398 for (isym = isymbuf1, isymend = isym + symcount1;
8399 isym < isymend; isym++)
8401 if (isym->st_shndx == (unsigned int) shndx1)
8408 if (count1 && isym->st_shndx != (unsigned int) shndx1)
8413 for (isym = isymbuf2, isymend = isym + symcount2;
8414 isym < isymend; isym++)
8416 if (isym->st_shndx == (unsigned int) shndx2)
8423 if (count2 && isym->st_shndx != (unsigned int) shndx2)
8427 if (count1 == 0 || count2 == 0 || count1 != count2)
8430 symtable1 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8431 symtable2 = bfd_malloc (count1 * sizeof (struct elf_symbol));
8433 if (symtable1 == NULL || symtable2 == NULL)
8437 for (isym = isymstart1, isymend = isym + count1;
8438 isym < isymend; isym++)
8441 symp->name = bfd_elf_string_from_elf_section (bfd1,
8448 for (isym = isymstart2, isymend = isym + count1;
8449 isym < isymend; isym++)
8452 symp->name = bfd_elf_string_from_elf_section (bfd2,
8458 /* Sort symbol by name. */
8459 qsort (symtable1, count1, sizeof (struct elf_symbol),
8460 elf_sym_name_compare);
8461 qsort (symtable2, count1, sizeof (struct elf_symbol),
8462 elf_sym_name_compare);
8464 for (i = 0; i < count1; i++)
8465 /* Two symbols must have the same binding, type and name. */
8466 if (symtable1 [i].sym->st_info != symtable2 [i].sym->st_info
8467 || symtable1 [i].sym->st_other != symtable2 [i].sym->st_other
8468 || strcmp (symtable1 [i].name, symtable2 [i].name) != 0)
8486 /* It is only used by x86-64 so far. */
8487 asection _bfd_elf_large_com_section
8488 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
8489 SEC_IS_COMMON, NULL, NULL, "LARGE_COMMON",
8492 /* Return TRUE if 2 section types are compatible. */
8495 _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec,
8496 bfd *bbfd, const asection *bsec)
8500 || abfd->xvec->flavour != bfd_target_elf_flavour
8501 || bbfd->xvec->flavour != bfd_target_elf_flavour)
8504 return elf_section_type (asec) == elf_section_type (bsec);