1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd *abfd, file_ptr offset, bfd_size_type size)
218 if ((buf = bfd_alloc (abfd, size)) == NULL)
220 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
222 if (bfd_bread (buf, size, abfd) != size)
224 if (bfd_get_error () != bfd_error_system_call)
225 bfd_set_error (bfd_error_file_truncated);
232 bfd_elf_mkobject (bfd *abfd)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd) = bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
237 if (elf_tdata (abfd) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd *abfd)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd);
253 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
255 Elf_Internal_Shdr **i_shdrp;
256 char *shstrtab = NULL;
258 bfd_size_type shstrtabsize;
260 i_shdrp = elf_elfsections (abfd);
261 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
264 shstrtab = (char *) i_shdrp[shindex]->contents;
265 if (shstrtab == NULL)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset = i_shdrp[shindex]->sh_offset;
269 shstrtabsize = i_shdrp[shindex]->sh_size;
270 shstrtab = elf_read (abfd, offset, shstrtabsize);
271 i_shdrp[shindex]->contents = shstrtab;
277 bfd_elf_string_from_elf_section (bfd *abfd,
278 unsigned int shindex,
279 unsigned int strindex)
281 Elf_Internal_Shdr *hdr;
286 hdr = elf_elfsections (abfd)[shindex];
288 if (hdr->contents == NULL
289 && bfd_elf_get_str_section (abfd, shindex) == NULL)
292 if (strindex >= hdr->sh_size)
294 (*_bfd_error_handler)
295 (_("%s: invalid string offset %u >= %lu for section `%s'"),
296 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
297 ((shindex == elf_elfheader(abfd)->e_shstrndx
298 && strindex == hdr->sh_name)
300 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
304 return ((char *) hdr->contents) + strindex;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd *ibfd,
315 Elf_Internal_Shdr *symtab_hdr,
318 Elf_Internal_Sym *intsym_buf,
320 Elf_External_Sym_Shndx *extshndx_buf)
322 Elf_Internal_Shdr *shndx_hdr;
324 const bfd_byte *esym;
325 Elf_External_Sym_Shndx *alloc_extshndx;
326 Elf_External_Sym_Shndx *shndx;
327 Elf_Internal_Sym *isym;
328 Elf_Internal_Sym *isymend;
329 const struct elf_backend_data *bed;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
340 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
342 /* Read the symbols. */
344 alloc_extshndx = NULL;
345 bed = get_elf_backend_data (ibfd);
346 extsym_size = bed->s->sizeof_sym;
347 amt = symcount * extsym_size;
348 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
349 if (extsym_buf == NULL)
351 alloc_ext = bfd_malloc (amt);
352 extsym_buf = alloc_ext;
354 if (extsym_buf == NULL
355 || bfd_seek (ibfd, pos, SEEK_SET) != 0
356 || bfd_bread (extsym_buf, amt, ibfd) != amt)
362 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
366 amt = symcount * sizeof (Elf_External_Sym_Shndx);
367 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
368 if (extshndx_buf == NULL)
370 alloc_extshndx = bfd_malloc (amt);
371 extshndx_buf = alloc_extshndx;
373 if (extshndx_buf == NULL
374 || bfd_seek (ibfd, pos, SEEK_SET) != 0
375 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
382 if (intsym_buf == NULL)
384 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
385 intsym_buf = bfd_malloc (amt);
386 if (intsym_buf == NULL)
390 /* Convert the symbols to internal form. */
391 isymend = intsym_buf + symcount;
392 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
394 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
395 (*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym);
398 if (alloc_ext != NULL)
400 if (alloc_extshndx != NULL)
401 free (alloc_extshndx);
406 /* Look up a symbol name. */
408 bfd_elf_local_sym_name (bfd *abfd, Elf_Internal_Sym *isym)
410 unsigned int iname = isym->st_name;
411 unsigned int shindex = elf_tdata (abfd)->symtab_hdr.sh_link;
412 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION)
414 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
415 shindex = elf_elfheader (abfd)->e_shstrndx;
418 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
421 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
422 sections. The first element is the flags, the rest are section
425 typedef union elf_internal_group {
426 Elf_Internal_Shdr *shdr;
428 } Elf_Internal_Group;
430 /* Return the name of the group signature symbol. Why isn't the
431 signature just a string? */
434 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
436 Elf_Internal_Shdr *hdr;
437 unsigned char esym[sizeof (Elf64_External_Sym)];
438 Elf_External_Sym_Shndx eshndx;
439 Elf_Internal_Sym isym;
441 /* First we need to ensure the symbol table is available. */
442 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
445 /* Go read the symbol. */
446 hdr = &elf_tdata (abfd)->symtab_hdr;
447 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
448 &isym, esym, &eshndx) == NULL)
451 return bfd_elf_local_sym_name (abfd, &isym);
454 /* Set next_in_group list pointer, and group name for NEWSECT. */
457 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
459 unsigned int num_group = elf_tdata (abfd)->num_group;
461 /* If num_group is zero, read in all SHT_GROUP sections. The count
462 is set to -1 if there are no SHT_GROUP sections. */
465 unsigned int i, shnum;
467 /* First count the number of groups. If we have a SHT_GROUP
468 section with just a flag word (ie. sh_size is 4), ignore it. */
469 shnum = elf_numsections (abfd);
471 for (i = 0; i < shnum; i++)
473 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
474 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
479 num_group = (unsigned) -1;
480 elf_tdata (abfd)->num_group = num_group;
484 /* We keep a list of elf section headers for group sections,
485 so we can find them quickly. */
486 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
487 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
488 if (elf_tdata (abfd)->group_sect_ptr == NULL)
492 for (i = 0; i < shnum; i++)
494 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
495 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
498 Elf_Internal_Group *dest;
500 /* Add to list of sections. */
501 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
504 /* Read the raw contents. */
505 BFD_ASSERT (sizeof (*dest) >= 4);
506 amt = shdr->sh_size * sizeof (*dest) / 4;
507 shdr->contents = bfd_alloc (abfd, amt);
508 if (shdr->contents == NULL
509 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
510 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
514 /* Translate raw contents, a flag word followed by an
515 array of elf section indices all in target byte order,
516 to the flag word followed by an array of elf section
518 src = shdr->contents + shdr->sh_size;
519 dest = (Elf_Internal_Group *) (shdr->contents + amt);
526 idx = H_GET_32 (abfd, src);
527 if (src == shdr->contents)
530 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
531 shdr->bfd_section->flags
532 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
537 ((*_bfd_error_handler)
538 (_("%s: invalid SHT_GROUP entry"),
539 bfd_archive_filename (abfd)));
542 dest->shdr = elf_elfsections (abfd)[idx];
549 if (num_group != (unsigned) -1)
553 for (i = 0; i < num_group; i++)
555 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
556 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
557 unsigned int n_elt = shdr->sh_size / 4;
559 /* Look through this group's sections to see if current
560 section is a member. */
562 if ((++idx)->shdr == hdr)
566 /* We are a member of this group. Go looking through
567 other members to see if any others are linked via
569 idx = (Elf_Internal_Group *) shdr->contents;
570 n_elt = shdr->sh_size / 4;
572 if ((s = (++idx)->shdr->bfd_section) != NULL
573 && elf_next_in_group (s) != NULL)
577 /* Snarf the group name from other member, and
578 insert current section in circular list. */
579 elf_group_name (newsect) = elf_group_name (s);
580 elf_next_in_group (newsect) = elf_next_in_group (s);
581 elf_next_in_group (s) = newsect;
587 gname = group_signature (abfd, shdr);
590 elf_group_name (newsect) = gname;
592 /* Start a circular list with one element. */
593 elf_next_in_group (newsect) = newsect;
596 /* If the group section has been created, point to the
598 if (shdr->bfd_section != NULL)
599 elf_next_in_group (shdr->bfd_section) = newsect;
607 if (elf_group_name (newsect) == NULL)
609 (*_bfd_error_handler) (_("%s: no group info for section %s"),
610 bfd_archive_filename (abfd), newsect->name);
616 bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED, asection *group)
618 asection *first = elf_next_in_group (group);
623 s->output_section = bfd_abs_section_ptr;
624 s = elf_next_in_group (s);
625 /* These lists are circular. */
632 /* Make a BFD section from an ELF section. We store a pointer to the
633 BFD section in the bfd_section field of the header. */
636 _bfd_elf_make_section_from_shdr (bfd *abfd,
637 Elf_Internal_Shdr *hdr,
642 const struct elf_backend_data *bed;
644 if (hdr->bfd_section != NULL)
646 BFD_ASSERT (strcmp (name,
647 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
651 newsect = bfd_make_section_anyway (abfd, name);
655 /* Always use the real type/flags. */
656 elf_section_type (newsect) = hdr->sh_type;
657 elf_section_flags (newsect) = hdr->sh_flags;
659 newsect->filepos = hdr->sh_offset;
661 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
662 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
663 || ! bfd_set_section_alignment (abfd, newsect,
664 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
667 flags = SEC_NO_FLAGS;
668 if (hdr->sh_type != SHT_NOBITS)
669 flags |= SEC_HAS_CONTENTS;
670 if (hdr->sh_type == SHT_GROUP)
671 flags |= SEC_GROUP | SEC_EXCLUDE;
672 if ((hdr->sh_flags & SHF_ALLOC) != 0)
675 if (hdr->sh_type != SHT_NOBITS)
678 if ((hdr->sh_flags & SHF_WRITE) == 0)
679 flags |= SEC_READONLY;
680 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
682 else if ((flags & SEC_LOAD) != 0)
684 if ((hdr->sh_flags & SHF_MERGE) != 0)
687 newsect->entsize = hdr->sh_entsize;
688 if ((hdr->sh_flags & SHF_STRINGS) != 0)
689 flags |= SEC_STRINGS;
691 if (hdr->sh_flags & SHF_GROUP)
692 if (!setup_group (abfd, hdr, newsect))
694 if ((hdr->sh_flags & SHF_TLS) != 0)
695 flags |= SEC_THREAD_LOCAL;
697 /* The debugging sections appear to be recognized only by name, not
700 static const char *debug_sec_names [] =
709 for (i = ARRAY_SIZE (debug_sec_names); i--;)
710 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
714 flags |= SEC_DEBUGGING;
717 /* As a GNU extension, if the name begins with .gnu.linkonce, we
718 only link a single copy of the section. This is used to support
719 g++. g++ will emit each template expansion in its own section.
720 The symbols will be defined as weak, so that multiple definitions
721 are permitted. The GNU linker extension is to actually discard
722 all but one of the sections. */
723 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
724 && elf_next_in_group (newsect) == NULL)
725 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
727 bed = get_elf_backend_data (abfd);
728 if (bed->elf_backend_section_flags)
729 if (! bed->elf_backend_section_flags (&flags, hdr))
732 if (! bfd_set_section_flags (abfd, newsect, flags))
735 if ((flags & SEC_ALLOC) != 0)
737 Elf_Internal_Phdr *phdr;
740 /* Look through the phdrs to see if we need to adjust the lma.
741 If all the p_paddr fields are zero, we ignore them, since
742 some ELF linkers produce such output. */
743 phdr = elf_tdata (abfd)->phdr;
744 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
746 if (phdr->p_paddr != 0)
749 if (i < elf_elfheader (abfd)->e_phnum)
751 phdr = elf_tdata (abfd)->phdr;
752 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
754 /* This section is part of this segment if its file
755 offset plus size lies within the segment's memory
756 span and, if the section is loaded, the extent of the
757 loaded data lies within the extent of the segment.
759 Note - we used to check the p_paddr field as well, and
760 refuse to set the LMA if it was 0. This is wrong
761 though, as a perfectly valid initialised segment can
762 have a p_paddr of zero. Some architectures, eg ARM,
763 place special significance on the address 0 and
764 executables need to be able to have a segment which
765 covers this address. */
766 if (phdr->p_type == PT_LOAD
767 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
768 && (hdr->sh_offset + hdr->sh_size
769 <= phdr->p_offset + phdr->p_memsz)
770 && ((flags & SEC_LOAD) == 0
771 || (hdr->sh_offset + hdr->sh_size
772 <= phdr->p_offset + phdr->p_filesz)))
774 if ((flags & SEC_LOAD) == 0)
775 newsect->lma = (phdr->p_paddr
776 + hdr->sh_addr - phdr->p_vaddr);
778 /* We used to use the same adjustment for SEC_LOAD
779 sections, but that doesn't work if the segment
780 is packed with code from multiple VMAs.
781 Instead we calculate the section LMA based on
782 the segment LMA. It is assumed that the
783 segment will contain sections with contiguous
784 LMAs, even if the VMAs are not. */
785 newsect->lma = (phdr->p_paddr
786 + hdr->sh_offset - phdr->p_offset);
788 /* With contiguous segments, we can't tell from file
789 offsets whether a section with zero size should
790 be placed at the end of one segment or the
791 beginning of the next. Decide based on vaddr. */
792 if (hdr->sh_addr >= phdr->p_vaddr
793 && (hdr->sh_addr + hdr->sh_size
794 <= phdr->p_vaddr + phdr->p_memsz))
801 hdr->bfd_section = newsect;
802 elf_section_data (newsect)->this_hdr = *hdr;
812 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
815 Helper functions for GDB to locate the string tables.
816 Since BFD hides string tables from callers, GDB needs to use an
817 internal hook to find them. Sun's .stabstr, in particular,
818 isn't even pointed to by the .stab section, so ordinary
819 mechanisms wouldn't work to find it, even if we had some.
822 struct elf_internal_shdr *
823 bfd_elf_find_section (bfd *abfd, char *name)
825 Elf_Internal_Shdr **i_shdrp;
830 i_shdrp = elf_elfsections (abfd);
833 shstrtab = bfd_elf_get_str_section (abfd,
834 elf_elfheader (abfd)->e_shstrndx);
835 if (shstrtab != NULL)
837 max = elf_numsections (abfd);
838 for (i = 1; i < max; i++)
839 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
846 const char *const bfd_elf_section_type_names[] = {
847 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
848 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
849 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
852 /* ELF relocs are against symbols. If we are producing relocatable
853 output, and the reloc is against an external symbol, and nothing
854 has given us any additional addend, the resulting reloc will also
855 be against the same symbol. In such a case, we don't want to
856 change anything about the way the reloc is handled, since it will
857 all be done at final link time. Rather than put special case code
858 into bfd_perform_relocation, all the reloc types use this howto
859 function. It just short circuits the reloc if producing
860 relocatable output against an external symbol. */
862 bfd_reloc_status_type
863 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
864 arelent *reloc_entry,
866 void *data ATTRIBUTE_UNUSED,
867 asection *input_section,
869 char **error_message ATTRIBUTE_UNUSED)
871 if (output_bfd != NULL
872 && (symbol->flags & BSF_SECTION_SYM) == 0
873 && (! reloc_entry->howto->partial_inplace
874 || reloc_entry->addend == 0))
876 reloc_entry->address += input_section->output_offset;
880 return bfd_reloc_continue;
883 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
886 merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED,
889 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
890 sec->sec_info_type = ELF_INFO_TYPE_NONE;
893 /* Finish SHF_MERGE section merging. */
896 _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info)
898 if (!is_elf_hash_table (info->hash))
900 if (elf_hash_table (info)->merge_info)
901 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
902 merge_sections_remove_hook);
907 _bfd_elf_link_just_syms (asection *sec, struct bfd_link_info *info)
909 sec->output_section = bfd_abs_section_ptr;
910 sec->output_offset = sec->vma;
911 if (!is_elf_hash_table (info->hash))
914 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
917 /* Copy the program header and other data from one object module to
921 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
923 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
924 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
927 BFD_ASSERT (!elf_flags_init (obfd)
928 || (elf_elfheader (obfd)->e_flags
929 == elf_elfheader (ibfd)->e_flags));
931 elf_gp (obfd) = elf_gp (ibfd);
932 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
933 elf_flags_init (obfd) = TRUE;
937 /* Print out the program headers. */
940 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
943 Elf_Internal_Phdr *p;
945 bfd_byte *dynbuf = NULL;
947 p = elf_tdata (abfd)->phdr;
952 fprintf (f, _("\nProgram Header:\n"));
953 c = elf_elfheader (abfd)->e_phnum;
954 for (i = 0; i < c; i++, p++)
961 case PT_NULL: pt = "NULL"; break;
962 case PT_LOAD: pt = "LOAD"; break;
963 case PT_DYNAMIC: pt = "DYNAMIC"; break;
964 case PT_INTERP: pt = "INTERP"; break;
965 case PT_NOTE: pt = "NOTE"; break;
966 case PT_SHLIB: pt = "SHLIB"; break;
967 case PT_PHDR: pt = "PHDR"; break;
968 case PT_TLS: pt = "TLS"; break;
969 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
970 case PT_GNU_STACK: pt = "STACK"; break;
971 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
973 fprintf (f, "%8s off 0x", pt);
974 bfd_fprintf_vma (abfd, f, p->p_offset);
975 fprintf (f, " vaddr 0x");
976 bfd_fprintf_vma (abfd, f, p->p_vaddr);
977 fprintf (f, " paddr 0x");
978 bfd_fprintf_vma (abfd, f, p->p_paddr);
979 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
980 fprintf (f, " filesz 0x");
981 bfd_fprintf_vma (abfd, f, p->p_filesz);
982 fprintf (f, " memsz 0x");
983 bfd_fprintf_vma (abfd, f, p->p_memsz);
984 fprintf (f, " flags %c%c%c",
985 (p->p_flags & PF_R) != 0 ? 'r' : '-',
986 (p->p_flags & PF_W) != 0 ? 'w' : '-',
987 (p->p_flags & PF_X) != 0 ? 'x' : '-');
988 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
989 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
994 s = bfd_get_section_by_name (abfd, ".dynamic");
998 unsigned long shlink;
999 bfd_byte *extdyn, *extdynend;
1001 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1003 fprintf (f, _("\nDynamic Section:\n"));
1005 dynbuf = bfd_malloc (s->_raw_size);
1008 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1011 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1014 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1016 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1017 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1020 extdynend = extdyn + s->_raw_size;
1021 for (; extdyn < extdynend; extdyn += extdynsize)
1023 Elf_Internal_Dyn dyn;
1026 bfd_boolean stringp;
1028 (*swap_dyn_in) (abfd, extdyn, &dyn);
1030 if (dyn.d_tag == DT_NULL)
1037 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1041 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1042 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1043 case DT_PLTGOT: name = "PLTGOT"; break;
1044 case DT_HASH: name = "HASH"; break;
1045 case DT_STRTAB: name = "STRTAB"; break;
1046 case DT_SYMTAB: name = "SYMTAB"; break;
1047 case DT_RELA: name = "RELA"; break;
1048 case DT_RELASZ: name = "RELASZ"; break;
1049 case DT_RELAENT: name = "RELAENT"; break;
1050 case DT_STRSZ: name = "STRSZ"; break;
1051 case DT_SYMENT: name = "SYMENT"; break;
1052 case DT_INIT: name = "INIT"; break;
1053 case DT_FINI: name = "FINI"; break;
1054 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1055 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1056 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1057 case DT_REL: name = "REL"; break;
1058 case DT_RELSZ: name = "RELSZ"; break;
1059 case DT_RELENT: name = "RELENT"; break;
1060 case DT_PLTREL: name = "PLTREL"; break;
1061 case DT_DEBUG: name = "DEBUG"; break;
1062 case DT_TEXTREL: name = "TEXTREL"; break;
1063 case DT_JMPREL: name = "JMPREL"; break;
1064 case DT_BIND_NOW: name = "BIND_NOW"; break;
1065 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1066 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1067 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1068 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1069 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1070 case DT_FLAGS: name = "FLAGS"; break;
1071 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1072 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1073 case DT_CHECKSUM: name = "CHECKSUM"; break;
1074 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1075 case DT_MOVEENT: name = "MOVEENT"; break;
1076 case DT_MOVESZ: name = "MOVESZ"; break;
1077 case DT_FEATURE: name = "FEATURE"; break;
1078 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1079 case DT_SYMINSZ: name = "SYMINSZ"; break;
1080 case DT_SYMINENT: name = "SYMINENT"; break;
1081 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1082 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1083 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1084 case DT_PLTPAD: name = "PLTPAD"; break;
1085 case DT_MOVETAB: name = "MOVETAB"; break;
1086 case DT_SYMINFO: name = "SYMINFO"; break;
1087 case DT_RELACOUNT: name = "RELACOUNT"; break;
1088 case DT_RELCOUNT: name = "RELCOUNT"; break;
1089 case DT_FLAGS_1: name = "FLAGS_1"; break;
1090 case DT_VERSYM: name = "VERSYM"; break;
1091 case DT_VERDEF: name = "VERDEF"; break;
1092 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1093 case DT_VERNEED: name = "VERNEED"; break;
1094 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1095 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1096 case DT_USED: name = "USED"; break;
1097 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1100 fprintf (f, " %-11s ", name);
1102 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1106 unsigned int tagv = dyn.d_un.d_val;
1108 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1111 fprintf (f, "%s", string);
1120 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1121 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1123 if (! _bfd_elf_slurp_version_tables (abfd))
1127 if (elf_dynverdef (abfd) != 0)
1129 Elf_Internal_Verdef *t;
1131 fprintf (f, _("\nVersion definitions:\n"));
1132 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1134 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1135 t->vd_flags, t->vd_hash, t->vd_nodename);
1136 if (t->vd_auxptr->vda_nextptr != NULL)
1138 Elf_Internal_Verdaux *a;
1141 for (a = t->vd_auxptr->vda_nextptr;
1144 fprintf (f, "%s ", a->vda_nodename);
1150 if (elf_dynverref (abfd) != 0)
1152 Elf_Internal_Verneed *t;
1154 fprintf (f, _("\nVersion References:\n"));
1155 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1157 Elf_Internal_Vernaux *a;
1159 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1160 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1161 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1162 a->vna_flags, a->vna_other, a->vna_nodename);
1174 /* Display ELF-specific fields of a symbol. */
1177 bfd_elf_print_symbol (bfd *abfd,
1180 bfd_print_symbol_type how)
1185 case bfd_print_symbol_name:
1186 fprintf (file, "%s", symbol->name);
1188 case bfd_print_symbol_more:
1189 fprintf (file, "elf ");
1190 bfd_fprintf_vma (abfd, file, symbol->value);
1191 fprintf (file, " %lx", (long) symbol->flags);
1193 case bfd_print_symbol_all:
1195 const char *section_name;
1196 const char *name = NULL;
1197 const struct elf_backend_data *bed;
1198 unsigned char st_other;
1201 section_name = symbol->section ? symbol->section->name : "(*none*)";
1203 bed = get_elf_backend_data (abfd);
1204 if (bed->elf_backend_print_symbol_all)
1205 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1209 name = symbol->name;
1210 bfd_print_symbol_vandf (abfd, file, symbol);
1213 fprintf (file, " %s\t", section_name);
1214 /* Print the "other" value for a symbol. For common symbols,
1215 we've already printed the size; now print the alignment.
1216 For other symbols, we have no specified alignment, and
1217 we've printed the address; now print the size. */
1218 if (bfd_is_com_section (symbol->section))
1219 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1221 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1222 bfd_fprintf_vma (abfd, file, val);
1224 /* If we have version information, print it. */
1225 if (elf_tdata (abfd)->dynversym_section != 0
1226 && (elf_tdata (abfd)->dynverdef_section != 0
1227 || elf_tdata (abfd)->dynverref_section != 0))
1229 unsigned int vernum;
1230 const char *version_string;
1232 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1235 version_string = "";
1236 else if (vernum == 1)
1237 version_string = "Base";
1238 else if (vernum <= elf_tdata (abfd)->cverdefs)
1240 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1243 Elf_Internal_Verneed *t;
1245 version_string = "";
1246 for (t = elf_tdata (abfd)->verref;
1250 Elf_Internal_Vernaux *a;
1252 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1254 if (a->vna_other == vernum)
1256 version_string = a->vna_nodename;
1263 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1264 fprintf (file, " %-11s", version_string);
1269 fprintf (file, " (%s)", version_string);
1270 for (i = 10 - strlen (version_string); i > 0; --i)
1275 /* If the st_other field is not zero, print it. */
1276 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1281 case STV_INTERNAL: fprintf (file, " .internal"); break;
1282 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1283 case STV_PROTECTED: fprintf (file, " .protected"); break;
1285 /* Some other non-defined flags are also present, so print
1287 fprintf (file, " 0x%02x", (unsigned int) st_other);
1290 fprintf (file, " %s", name);
1296 /* Create an entry in an ELF linker hash table. */
1298 struct bfd_hash_entry *
1299 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
1300 struct bfd_hash_table *table,
1303 /* Allocate the structure if it has not already been allocated by a
1307 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1312 /* Call the allocation method of the superclass. */
1313 entry = _bfd_link_hash_newfunc (entry, table, string);
1316 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1317 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1319 /* Set local fields. */
1322 ret->dynstr_index = 0;
1323 ret->elf_hash_value = 0;
1324 ret->weakdef = NULL;
1325 ret->verinfo.verdef = NULL;
1326 ret->vtable_entries_size = 0;
1327 ret->vtable_entries_used = NULL;
1328 ret->vtable_parent = NULL;
1329 ret->got = htab->init_refcount;
1330 ret->plt = htab->init_refcount;
1332 ret->type = STT_NOTYPE;
1334 /* Assume that we have been called by a non-ELF symbol reader.
1335 This flag is then reset by the code which reads an ELF input
1336 file. This ensures that a symbol created by a non-ELF symbol
1337 reader will have the flag set correctly. */
1338 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1344 /* Copy data from an indirect symbol to its direct symbol, hiding the
1345 old indirect symbol. Also used for copying flags to a weakdef. */
1348 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data *bed,
1349 struct elf_link_hash_entry *dir,
1350 struct elf_link_hash_entry *ind)
1353 bfd_signed_vma lowest_valid = bed->can_refcount;
1355 /* Copy down any references that we may have already seen to the
1356 symbol which just became indirect. */
1358 dir->elf_link_hash_flags
1359 |= ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
1360 | ELF_LINK_HASH_REF_REGULAR
1361 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1362 | ELF_LINK_NON_GOT_REF
1363 | ELF_LINK_HASH_NEEDS_PLT
1364 | ELF_LINK_POINTER_EQUALITY_NEEDED);
1366 if (ind->root.type != bfd_link_hash_indirect)
1369 /* Copy over the global and procedure linkage table refcount entries.
1370 These may have been already set up by a check_relocs routine. */
1371 tmp = dir->got.refcount;
1372 if (tmp < lowest_valid)
1374 dir->got.refcount = ind->got.refcount;
1375 ind->got.refcount = tmp;
1378 BFD_ASSERT (ind->got.refcount < lowest_valid);
1380 tmp = dir->plt.refcount;
1381 if (tmp < lowest_valid)
1383 dir->plt.refcount = ind->plt.refcount;
1384 ind->plt.refcount = tmp;
1387 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1389 if (dir->dynindx == -1)
1391 dir->dynindx = ind->dynindx;
1392 dir->dynstr_index = ind->dynstr_index;
1394 ind->dynstr_index = 0;
1397 BFD_ASSERT (ind->dynindx == -1);
1401 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info,
1402 struct elf_link_hash_entry *h,
1403 bfd_boolean force_local)
1405 h->plt = elf_hash_table (info)->init_offset;
1406 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1409 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1410 if (h->dynindx != -1)
1413 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1419 /* Initialize an ELF linker hash table. */
1422 _bfd_elf_link_hash_table_init
1423 (struct elf_link_hash_table *table,
1425 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
1426 struct bfd_hash_table *,
1431 table->dynamic_sections_created = FALSE;
1432 table->dynobj = NULL;
1433 /* Make sure can_refcount is extended to the width and signedness of
1434 init_refcount before we subtract one from it. */
1435 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1436 table->init_refcount.refcount -= 1;
1437 table->init_offset.offset = -(bfd_vma) 1;
1438 /* The first dynamic symbol is a dummy. */
1439 table->dynsymcount = 1;
1440 table->dynstr = NULL;
1441 table->bucketcount = 0;
1442 table->needed = NULL;
1444 table->stab_info = NULL;
1445 table->merge_info = NULL;
1446 memset (&table->eh_info, 0, sizeof (table->eh_info));
1447 table->dynlocal = NULL;
1448 table->runpath = NULL;
1449 table->tls_sec = NULL;
1450 table->tls_size = 0;
1451 table->loaded = NULL;
1453 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1454 table->root.type = bfd_link_elf_hash_table;
1459 /* Create an ELF linker hash table. */
1461 struct bfd_link_hash_table *
1462 _bfd_elf_link_hash_table_create (bfd *abfd)
1464 struct elf_link_hash_table *ret;
1465 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1467 ret = bfd_malloc (amt);
1471 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1480 /* This is a hook for the ELF emulation code in the generic linker to
1481 tell the backend linker what file name to use for the DT_NEEDED
1482 entry for a dynamic object. The generic linker passes name as an
1483 empty string to indicate that no DT_NEEDED entry should be made. */
1486 bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
1488 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1489 && bfd_get_format (abfd) == bfd_object)
1490 elf_dt_name (abfd) = name;
1494 bfd_elf_set_dt_needed_soname (bfd *abfd, const char *name)
1496 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1497 && bfd_get_format (abfd) == bfd_object)
1498 elf_dt_soname (abfd) = name;
1501 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1502 the linker ELF emulation code. */
1504 struct bfd_link_needed_list *
1505 bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED,
1506 struct bfd_link_info *info)
1508 if (! is_elf_hash_table (info->hash))
1510 return elf_hash_table (info)->needed;
1513 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1514 hook for the linker ELF emulation code. */
1516 struct bfd_link_needed_list *
1517 bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED,
1518 struct bfd_link_info *info)
1520 if (! is_elf_hash_table (info->hash))
1522 return elf_hash_table (info)->runpath;
1525 /* Get the name actually used for a dynamic object for a link. This
1526 is the SONAME entry if there is one. Otherwise, it is the string
1527 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1530 bfd_elf_get_dt_soname (bfd *abfd)
1532 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1533 && bfd_get_format (abfd) == bfd_object)
1534 return elf_dt_name (abfd);
1538 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1539 the ELF linker emulation code. */
1542 bfd_elf_get_bfd_needed_list (bfd *abfd,
1543 struct bfd_link_needed_list **pneeded)
1546 bfd_byte *dynbuf = NULL;
1548 unsigned long shlink;
1549 bfd_byte *extdyn, *extdynend;
1551 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1555 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1556 || bfd_get_format (abfd) != bfd_object)
1559 s = bfd_get_section_by_name (abfd, ".dynamic");
1560 if (s == NULL || s->_raw_size == 0)
1563 dynbuf = bfd_malloc (s->_raw_size);
1567 if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size))
1570 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1574 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1576 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1577 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1580 extdynend = extdyn + s->_raw_size;
1581 for (; extdyn < extdynend; extdyn += extdynsize)
1583 Elf_Internal_Dyn dyn;
1585 (*swap_dyn_in) (abfd, extdyn, &dyn);
1587 if (dyn.d_tag == DT_NULL)
1590 if (dyn.d_tag == DT_NEEDED)
1593 struct bfd_link_needed_list *l;
1594 unsigned int tagv = dyn.d_un.d_val;
1597 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1602 l = bfd_alloc (abfd, amt);
1623 /* Allocate an ELF string table--force the first byte to be zero. */
1625 struct bfd_strtab_hash *
1626 _bfd_elf_stringtab_init (void)
1628 struct bfd_strtab_hash *ret;
1630 ret = _bfd_stringtab_init ();
1635 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1636 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1637 if (loc == (bfd_size_type) -1)
1639 _bfd_stringtab_free (ret);
1646 /* ELF .o/exec file reading */
1648 /* Create a new bfd section from an ELF section header. */
1651 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1653 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1654 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1655 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1658 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1660 switch (hdr->sh_type)
1663 /* Inactive section. Throw it away. */
1666 case SHT_PROGBITS: /* Normal section with contents. */
1667 case SHT_NOBITS: /* .bss section. */
1668 case SHT_HASH: /* .hash section. */
1669 case SHT_NOTE: /* .note section. */
1670 case SHT_INIT_ARRAY: /* .init_array section. */
1671 case SHT_FINI_ARRAY: /* .fini_array section. */
1672 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1673 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1675 case SHT_DYNAMIC: /* Dynamic linking information. */
1676 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1678 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1680 Elf_Internal_Shdr *dynsymhdr;
1682 /* The shared libraries distributed with hpux11 have a bogus
1683 sh_link field for the ".dynamic" section. Find the
1684 string table for the ".dynsym" section instead. */
1685 if (elf_dynsymtab (abfd) != 0)
1687 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1688 hdr->sh_link = dynsymhdr->sh_link;
1692 unsigned int i, num_sec;
1694 num_sec = elf_numsections (abfd);
1695 for (i = 1; i < num_sec; i++)
1697 dynsymhdr = elf_elfsections (abfd)[i];
1698 if (dynsymhdr->sh_type == SHT_DYNSYM)
1700 hdr->sh_link = dynsymhdr->sh_link;
1708 case SHT_SYMTAB: /* A symbol table */
1709 if (elf_onesymtab (abfd) == shindex)
1712 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1713 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1714 elf_onesymtab (abfd) = shindex;
1715 elf_tdata (abfd)->symtab_hdr = *hdr;
1716 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1717 abfd->flags |= HAS_SYMS;
1719 /* Sometimes a shared object will map in the symbol table. If
1720 SHF_ALLOC is set, and this is a shared object, then we also
1721 treat this section as a BFD section. We can not base the
1722 decision purely on SHF_ALLOC, because that flag is sometimes
1723 set in a relocatable object file, which would confuse the
1725 if ((hdr->sh_flags & SHF_ALLOC) != 0
1726 && (abfd->flags & DYNAMIC) != 0
1727 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1732 case SHT_DYNSYM: /* A dynamic symbol table */
1733 if (elf_dynsymtab (abfd) == shindex)
1736 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1737 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1738 elf_dynsymtab (abfd) = shindex;
1739 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1740 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1741 abfd->flags |= HAS_SYMS;
1743 /* Besides being a symbol table, we also treat this as a regular
1744 section, so that objcopy can handle it. */
1745 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1747 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1748 if (elf_symtab_shndx (abfd) == shindex)
1751 /* Get the associated symbol table. */
1752 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1753 || hdr->sh_link != elf_onesymtab (abfd))
1756 elf_symtab_shndx (abfd) = shindex;
1757 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1758 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1761 case SHT_STRTAB: /* A string table */
1762 if (hdr->bfd_section != NULL)
1764 if (ehdr->e_shstrndx == shindex)
1766 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1767 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1771 unsigned int i, num_sec;
1773 num_sec = elf_numsections (abfd);
1774 for (i = 1; i < num_sec; i++)
1776 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1777 if (hdr2->sh_link == shindex)
1779 if (! bfd_section_from_shdr (abfd, i))
1781 if (elf_onesymtab (abfd) == i)
1783 elf_tdata (abfd)->strtab_hdr = *hdr;
1784 elf_elfsections (abfd)[shindex] =
1785 &elf_tdata (abfd)->strtab_hdr;
1788 if (elf_dynsymtab (abfd) == i)
1790 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1791 elf_elfsections (abfd)[shindex] = hdr =
1792 &elf_tdata (abfd)->dynstrtab_hdr;
1793 /* We also treat this as a regular section, so
1794 that objcopy can handle it. */
1797 #if 0 /* Not handling other string tables specially right now. */
1798 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1799 /* We have a strtab for some random other section. */
1800 newsect = (asection *) hdr2->bfd_section;
1803 hdr->bfd_section = newsect;
1804 hdr2 = &elf_section_data (newsect)->str_hdr;
1806 elf_elfsections (abfd)[shindex] = hdr2;
1812 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1816 /* *These* do a lot of work -- but build no sections! */
1818 asection *target_sect;
1819 Elf_Internal_Shdr *hdr2;
1820 unsigned int num_sec = elf_numsections (abfd);
1822 /* Check for a bogus link to avoid crashing. */
1823 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1824 || hdr->sh_link >= num_sec)
1826 ((*_bfd_error_handler)
1827 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1828 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1829 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1832 /* For some incomprehensible reason Oracle distributes
1833 libraries for Solaris in which some of the objects have
1834 bogus sh_link fields. It would be nice if we could just
1835 reject them, but, unfortunately, some people need to use
1836 them. We scan through the section headers; if we find only
1837 one suitable symbol table, we clobber the sh_link to point
1838 to it. I hope this doesn't break anything. */
1839 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1840 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1846 for (scan = 1; scan < num_sec; scan++)
1848 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1849 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1860 hdr->sh_link = found;
1863 /* Get the symbol table. */
1864 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1865 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1868 /* If this reloc section does not use the main symbol table we
1869 don't treat it as a reloc section. BFD can't adequately
1870 represent such a section, so at least for now, we don't
1871 try. We just present it as a normal section. We also
1872 can't use it as a reloc section if it points to the null
1874 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1875 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1877 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1879 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1880 if (target_sect == NULL)
1883 if ((target_sect->flags & SEC_RELOC) == 0
1884 || target_sect->reloc_count == 0)
1885 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1889 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1890 amt = sizeof (*hdr2);
1891 hdr2 = bfd_alloc (abfd, amt);
1892 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1895 elf_elfsections (abfd)[shindex] = hdr2;
1896 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1897 target_sect->flags |= SEC_RELOC;
1898 target_sect->relocation = NULL;
1899 target_sect->rel_filepos = hdr->sh_offset;
1900 /* In the section to which the relocations apply, mark whether
1901 its relocations are of the REL or RELA variety. */
1902 if (hdr->sh_size != 0)
1903 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
1904 abfd->flags |= HAS_RELOC;
1909 case SHT_GNU_verdef:
1910 elf_dynverdef (abfd) = shindex;
1911 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1912 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1915 case SHT_GNU_versym:
1916 elf_dynversym (abfd) = shindex;
1917 elf_tdata (abfd)->dynversym_hdr = *hdr;
1918 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1921 case SHT_GNU_verneed:
1922 elf_dynverref (abfd) = shindex;
1923 elf_tdata (abfd)->dynverref_hdr = *hdr;
1924 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1931 /* We need a BFD section for objcopy and relocatable linking,
1932 and it's handy to have the signature available as the section
1934 name = group_signature (abfd, hdr);
1937 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
1939 if (hdr->contents != NULL)
1941 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1942 unsigned int n_elt = hdr->sh_size / 4;
1945 if (idx->flags & GRP_COMDAT)
1946 hdr->bfd_section->flags
1947 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1949 while (--n_elt != 0)
1950 if ((s = (++idx)->shdr->bfd_section) != NULL
1951 && elf_next_in_group (s) != NULL)
1953 elf_next_in_group (hdr->bfd_section) = s;
1960 /* Check for any processor-specific section types. */
1962 if (bed->elf_backend_section_from_shdr)
1963 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1971 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1972 Return SEC for sections that have no elf section, and NULL on error. */
1975 bfd_section_from_r_symndx (bfd *abfd,
1976 struct sym_sec_cache *cache,
1978 unsigned long r_symndx)
1980 Elf_Internal_Shdr *symtab_hdr;
1981 unsigned char esym[sizeof (Elf64_External_Sym)];
1982 Elf_External_Sym_Shndx eshndx;
1983 Elf_Internal_Sym isym;
1984 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1986 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
1987 return cache->sec[ent];
1989 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1990 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
1991 &isym, esym, &eshndx) == NULL)
1994 if (cache->abfd != abfd)
1996 memset (cache->indx, -1, sizeof (cache->indx));
1999 cache->indx[ent] = r_symndx;
2000 cache->sec[ent] = sec;
2001 if ((isym.st_shndx != SHN_UNDEF && isym.st_shndx < SHN_LORESERVE)
2002 || isym.st_shndx > SHN_HIRESERVE)
2005 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2007 cache->sec[ent] = s;
2009 return cache->sec[ent];
2012 /* Given an ELF section number, retrieve the corresponding BFD
2016 bfd_section_from_elf_index (bfd *abfd, unsigned int index)
2018 if (index >= elf_numsections (abfd))
2020 return elf_elfsections (abfd)[index]->bfd_section;
2023 static struct bfd_elf_special_section const special_sections[] =
2025 { ".bss", 4, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2026 { ".comment", 8, 0, SHT_PROGBITS, 0 },
2027 { ".data", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2028 { ".data1", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2029 { ".debug", 6, 0, SHT_PROGBITS, 0 },
2030 { ".fini", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2031 { ".init", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2032 { ".line", 5, 0, SHT_PROGBITS, 0 },
2033 { ".rodata", 7, -2, SHT_PROGBITS, SHF_ALLOC },
2034 { ".rodata1", 8, 0, SHT_PROGBITS, SHF_ALLOC },
2035 { ".tbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2036 { ".tdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2037 { ".text", 5, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2038 { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2039 { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2040 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2041 { ".debug_line", 11, 0, SHT_PROGBITS, 0 },
2042 { ".debug_info", 11, 0, SHT_PROGBITS, 0 },
2043 { ".debug_abbrev", 13, 0, SHT_PROGBITS, 0 },
2044 { ".debug_aranges", 14, 0, SHT_PROGBITS, 0 },
2045 { ".dynamic", 8, 0, SHT_DYNAMIC, SHF_ALLOC },
2046 { ".dynstr", 7, 0, SHT_STRTAB, SHF_ALLOC },
2047 { ".dynsym", 7, 0, SHT_DYNSYM, SHF_ALLOC },
2048 { ".got", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2049 { ".hash", 5, 0, SHT_HASH, SHF_ALLOC },
2050 { ".interp", 7, 0, SHT_PROGBITS, 0 },
2051 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2052 { ".shstrtab", 9, 0, SHT_STRTAB, 0 },
2053 { ".strtab", 7, 0, SHT_STRTAB, 0 },
2054 { ".symtab", 7, 0, SHT_SYMTAB, 0 },
2055 { ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
2056 { ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
2057 { ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
2058 { ".note", 5, -1, SHT_NOTE, 0 },
2059 { ".rela", 5, -1, SHT_RELA, 0 },
2060 { ".rel", 4, -1, SHT_REL, 0 },
2061 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2062 { NULL, 0, 0, 0, 0 }
2065 static const struct bfd_elf_special_section *
2066 get_special_section (const char *name,
2067 const struct bfd_elf_special_section *special_sections,
2071 int len = strlen (name);
2073 for (i = 0; special_sections[i].prefix != NULL; i++)
2076 int prefix_len = special_sections[i].prefix_length;
2078 if (len < prefix_len)
2080 if (memcmp (name, special_sections[i].prefix, prefix_len) != 0)
2083 suffix_len = special_sections[i].suffix_length;
2084 if (suffix_len <= 0)
2086 if (name[prefix_len] != 0)
2088 if (suffix_len == 0)
2090 if (name[prefix_len] != '.'
2091 && (suffix_len == -2
2092 || (rela && special_sections[i].type == SHT_REL)))
2098 if (len < prefix_len + suffix_len)
2100 if (memcmp (name + len - suffix_len,
2101 special_sections[i].prefix + prefix_len,
2105 return &special_sections[i];
2111 const struct bfd_elf_special_section *
2112 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name)
2114 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2115 const struct bfd_elf_special_section *ssect = NULL;
2117 /* See if this is one of the special sections. */
2120 unsigned int rela = bed->default_use_rela_p;
2122 if (bed->special_sections)
2123 ssect = get_special_section (name, bed->special_sections, rela);
2126 ssect = get_special_section (name, special_sections, rela);
2133 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2135 struct bfd_elf_section_data *sdata;
2136 const struct bfd_elf_special_section *ssect;
2138 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2141 sdata = bfd_zalloc (abfd, sizeof (*sdata));
2144 sec->used_by_bfd = sdata;
2147 elf_section_type (sec) = SHT_NULL;
2148 ssect = _bfd_elf_get_sec_type_attr (abfd, sec->name);
2151 elf_section_type (sec) = ssect->type;
2152 elf_section_flags (sec) = ssect->attr;
2155 /* Indicate whether or not this section should use RELA relocations. */
2156 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2161 /* Create a new bfd section from an ELF program header.
2163 Since program segments have no names, we generate a synthetic name
2164 of the form segment<NUM>, where NUM is generally the index in the
2165 program header table. For segments that are split (see below) we
2166 generate the names segment<NUM>a and segment<NUM>b.
2168 Note that some program segments may have a file size that is different than
2169 (less than) the memory size. All this means is that at execution the
2170 system must allocate the amount of memory specified by the memory size,
2171 but only initialize it with the first "file size" bytes read from the
2172 file. This would occur for example, with program segments consisting
2173 of combined data+bss.
2175 To handle the above situation, this routine generates TWO bfd sections
2176 for the single program segment. The first has the length specified by
2177 the file size of the segment, and the second has the length specified
2178 by the difference between the two sizes. In effect, the segment is split
2179 into it's initialized and uninitialized parts.
2184 _bfd_elf_make_section_from_phdr (bfd *abfd,
2185 Elf_Internal_Phdr *hdr,
2187 const char *typename)
2195 split = ((hdr->p_memsz > 0)
2196 && (hdr->p_filesz > 0)
2197 && (hdr->p_memsz > hdr->p_filesz));
2198 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2199 len = strlen (namebuf) + 1;
2200 name = bfd_alloc (abfd, len);
2203 memcpy (name, namebuf, len);
2204 newsect = bfd_make_section (abfd, name);
2205 if (newsect == NULL)
2207 newsect->vma = hdr->p_vaddr;
2208 newsect->lma = hdr->p_paddr;
2209 newsect->_raw_size = hdr->p_filesz;
2210 newsect->filepos = hdr->p_offset;
2211 newsect->flags |= SEC_HAS_CONTENTS;
2212 newsect->alignment_power = bfd_log2 (hdr->p_align);
2213 if (hdr->p_type == PT_LOAD)
2215 newsect->flags |= SEC_ALLOC;
2216 newsect->flags |= SEC_LOAD;
2217 if (hdr->p_flags & PF_X)
2219 /* FIXME: all we known is that it has execute PERMISSION,
2221 newsect->flags |= SEC_CODE;
2224 if (!(hdr->p_flags & PF_W))
2226 newsect->flags |= SEC_READONLY;
2231 sprintf (namebuf, "%s%db", typename, index);
2232 len = strlen (namebuf) + 1;
2233 name = bfd_alloc (abfd, len);
2236 memcpy (name, namebuf, len);
2237 newsect = bfd_make_section (abfd, name);
2238 if (newsect == NULL)
2240 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2241 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2242 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2243 if (hdr->p_type == PT_LOAD)
2245 newsect->flags |= SEC_ALLOC;
2246 if (hdr->p_flags & PF_X)
2247 newsect->flags |= SEC_CODE;
2249 if (!(hdr->p_flags & PF_W))
2250 newsect->flags |= SEC_READONLY;
2257 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int index)
2259 const struct elf_backend_data *bed;
2261 switch (hdr->p_type)
2264 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2267 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2270 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2273 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2276 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2278 if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2283 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2286 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2288 case PT_GNU_EH_FRAME:
2289 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2293 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2296 /* Check for any processor-specific program segment types.
2297 If no handler for them, default to making "segment" sections. */
2298 bed = get_elf_backend_data (abfd);
2299 if (bed->elf_backend_section_from_phdr)
2300 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2302 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2306 /* Initialize REL_HDR, the section-header for new section, containing
2307 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2308 relocations; otherwise, we use REL relocations. */
2311 _bfd_elf_init_reloc_shdr (bfd *abfd,
2312 Elf_Internal_Shdr *rel_hdr,
2314 bfd_boolean use_rela_p)
2317 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2318 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2320 name = bfd_alloc (abfd, amt);
2323 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2325 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2327 if (rel_hdr->sh_name == (unsigned int) -1)
2329 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2330 rel_hdr->sh_entsize = (use_rela_p
2331 ? bed->s->sizeof_rela
2332 : bed->s->sizeof_rel);
2333 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2334 rel_hdr->sh_flags = 0;
2335 rel_hdr->sh_addr = 0;
2336 rel_hdr->sh_size = 0;
2337 rel_hdr->sh_offset = 0;
2342 /* Set up an ELF internal section header for a section. */
2345 elf_fake_sections (bfd *abfd, asection *asect, void *failedptrarg)
2347 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2348 bfd_boolean *failedptr = failedptrarg;
2349 Elf_Internal_Shdr *this_hdr;
2353 /* We already failed; just get out of the bfd_map_over_sections
2358 this_hdr = &elf_section_data (asect)->this_hdr;
2360 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2361 asect->name, FALSE);
2362 if (this_hdr->sh_name == (unsigned int) -1)
2368 this_hdr->sh_flags = 0;
2370 if ((asect->flags & SEC_ALLOC) != 0
2371 || asect->user_set_vma)
2372 this_hdr->sh_addr = asect->vma;
2374 this_hdr->sh_addr = 0;
2376 this_hdr->sh_offset = 0;
2377 this_hdr->sh_size = asect->_raw_size;
2378 this_hdr->sh_link = 0;
2379 this_hdr->sh_addralign = 1 << asect->alignment_power;
2380 /* The sh_entsize and sh_info fields may have been set already by
2381 copy_private_section_data. */
2383 this_hdr->bfd_section = asect;
2384 this_hdr->contents = NULL;
2386 /* If the section type is unspecified, we set it based on
2388 if (this_hdr->sh_type == SHT_NULL)
2390 if ((asect->flags & SEC_ALLOC) != 0
2391 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2392 || (asect->flags & SEC_NEVER_LOAD) != 0))
2393 this_hdr->sh_type = SHT_NOBITS;
2395 this_hdr->sh_type = SHT_PROGBITS;
2398 switch (this_hdr->sh_type)
2404 case SHT_INIT_ARRAY:
2405 case SHT_FINI_ARRAY:
2406 case SHT_PREINIT_ARRAY:
2413 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2417 this_hdr->sh_entsize = bed->s->sizeof_sym;
2421 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2425 if (get_elf_backend_data (abfd)->may_use_rela_p)
2426 this_hdr->sh_entsize = bed->s->sizeof_rela;
2430 if (get_elf_backend_data (abfd)->may_use_rel_p)
2431 this_hdr->sh_entsize = bed->s->sizeof_rel;
2434 case SHT_GNU_versym:
2435 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2438 case SHT_GNU_verdef:
2439 this_hdr->sh_entsize = 0;
2440 /* objcopy or strip will copy over sh_info, but may not set
2441 cverdefs. The linker will set cverdefs, but sh_info will be
2443 if (this_hdr->sh_info == 0)
2444 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2446 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2447 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2450 case SHT_GNU_verneed:
2451 this_hdr->sh_entsize = 0;
2452 /* objcopy or strip will copy over sh_info, but may not set
2453 cverrefs. The linker will set cverrefs, but sh_info will be
2455 if (this_hdr->sh_info == 0)
2456 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2458 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2459 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2463 this_hdr->sh_entsize = 4;
2467 if ((asect->flags & SEC_ALLOC) != 0)
2468 this_hdr->sh_flags |= SHF_ALLOC;
2469 if ((asect->flags & SEC_READONLY) == 0)
2470 this_hdr->sh_flags |= SHF_WRITE;
2471 if ((asect->flags & SEC_CODE) != 0)
2472 this_hdr->sh_flags |= SHF_EXECINSTR;
2473 if ((asect->flags & SEC_MERGE) != 0)
2475 this_hdr->sh_flags |= SHF_MERGE;
2476 this_hdr->sh_entsize = asect->entsize;
2477 if ((asect->flags & SEC_STRINGS) != 0)
2478 this_hdr->sh_flags |= SHF_STRINGS;
2480 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2481 this_hdr->sh_flags |= SHF_GROUP;
2482 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2484 this_hdr->sh_flags |= SHF_TLS;
2485 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2487 struct bfd_link_order *o;
2489 this_hdr->sh_size = 0;
2490 for (o = asect->link_order_head; o != NULL; o = o->next)
2491 if (this_hdr->sh_size < o->offset + o->size)
2492 this_hdr->sh_size = o->offset + o->size;
2493 if (this_hdr->sh_size)
2494 this_hdr->sh_type = SHT_NOBITS;
2498 /* Check for processor-specific section types. */
2499 if (bed->elf_backend_fake_sections
2500 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2503 /* If the section has relocs, set up a section header for the
2504 SHT_REL[A] section. If two relocation sections are required for
2505 this section, it is up to the processor-specific back-end to
2506 create the other. */
2507 if ((asect->flags & SEC_RELOC) != 0
2508 && !_bfd_elf_init_reloc_shdr (abfd,
2509 &elf_section_data (asect)->rel_hdr,
2515 /* Fill in the contents of a SHT_GROUP section. */
2518 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2520 bfd_boolean *failedptr = failedptrarg;
2521 unsigned long symindx;
2522 asection *elt, *first;
2524 struct bfd_link_order *l;
2527 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2532 if (elf_group_id (sec) != NULL)
2533 symindx = elf_group_id (sec)->udata.i;
2537 /* If called from the assembler, swap_out_syms will have set up
2538 elf_section_syms; If called for "ld -r", use target_index. */
2539 if (elf_section_syms (abfd) != NULL)
2540 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2542 symindx = sec->target_index;
2544 elf_section_data (sec)->this_hdr.sh_info = symindx;
2546 /* The contents won't be allocated for "ld -r" or objcopy. */
2548 if (sec->contents == NULL)
2551 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2553 /* Arrange for the section to be written out. */
2554 elf_section_data (sec)->this_hdr.contents = sec->contents;
2555 if (sec->contents == NULL)
2562 loc = sec->contents + sec->_raw_size;
2564 /* Get the pointer to the first section in the group that gas
2565 squirreled away here. objcopy arranges for this to be set to the
2566 start of the input section group. */
2567 first = elt = elf_next_in_group (sec);
2569 /* First element is a flag word. Rest of section is elf section
2570 indices for all the sections of the group. Write them backwards
2571 just to keep the group in the same order as given in .section
2572 directives, not that it matters. */
2581 s = s->output_section;
2584 idx = elf_section_data (s)->this_idx;
2585 H_PUT_32 (abfd, idx, loc);
2586 elt = elf_next_in_group (elt);
2591 /* If this is a relocatable link, then the above did nothing because
2592 SEC is the output section. Look through the input sections
2594 for (l = sec->link_order_head; l != NULL; l = l->next)
2595 if (l->type == bfd_indirect_link_order
2596 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2601 elf_section_data (elt->output_section)->this_idx, loc);
2602 elt = elf_next_in_group (elt);
2603 /* During a relocatable link, the lists are circular. */
2605 while (elt != elf_next_in_group (l->u.indirect.section));
2607 /* With ld -r, merging SHT_GROUP sections results in wasted space
2608 due to allowing for the flag word on each input. We may well
2609 duplicate entries too. */
2610 while ((loc -= 4) > sec->contents)
2611 H_PUT_32 (abfd, 0, loc);
2613 if (loc != sec->contents)
2616 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2619 /* Assign all ELF section numbers. The dummy first section is handled here
2620 too. The link/info pointers for the standard section types are filled
2621 in here too, while we're at it. */
2624 assign_section_numbers (bfd *abfd)
2626 struct elf_obj_tdata *t = elf_tdata (abfd);
2628 unsigned int section_number, secn;
2629 Elf_Internal_Shdr **i_shdrp;
2634 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2636 for (sec = abfd->sections; sec; sec = sec->next)
2638 struct bfd_elf_section_data *d = elf_section_data (sec);
2640 if (section_number == SHN_LORESERVE)
2641 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2642 d->this_idx = section_number++;
2643 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2644 if ((sec->flags & SEC_RELOC) == 0)
2648 if (section_number == SHN_LORESERVE)
2649 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2650 d->rel_idx = section_number++;
2651 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2656 if (section_number == SHN_LORESERVE)
2657 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2658 d->rel_idx2 = section_number++;
2659 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2665 if (section_number == SHN_LORESERVE)
2666 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2667 t->shstrtab_section = section_number++;
2668 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2669 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2671 if (bfd_get_symcount (abfd) > 0)
2673 if (section_number == SHN_LORESERVE)
2674 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2675 t->symtab_section = section_number++;
2676 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2677 if (section_number > SHN_LORESERVE - 2)
2679 if (section_number == SHN_LORESERVE)
2680 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2681 t->symtab_shndx_section = section_number++;
2682 t->symtab_shndx_hdr.sh_name
2683 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2684 ".symtab_shndx", FALSE);
2685 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2688 if (section_number == SHN_LORESERVE)
2689 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2690 t->strtab_section = section_number++;
2691 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2694 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2695 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2697 elf_numsections (abfd) = section_number;
2698 elf_elfheader (abfd)->e_shnum = section_number;
2699 if (section_number > SHN_LORESERVE)
2700 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2702 /* Set up the list of section header pointers, in agreement with the
2704 amt = section_number * sizeof (Elf_Internal_Shdr *);
2705 i_shdrp = bfd_zalloc (abfd, amt);
2706 if (i_shdrp == NULL)
2709 amt = sizeof (Elf_Internal_Shdr);
2710 i_shdrp[0] = bfd_zalloc (abfd, amt);
2711 if (i_shdrp[0] == NULL)
2713 bfd_release (abfd, i_shdrp);
2717 elf_elfsections (abfd) = i_shdrp;
2719 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2720 if (bfd_get_symcount (abfd) > 0)
2722 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2723 if (elf_numsections (abfd) > SHN_LORESERVE)
2725 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2726 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2728 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2729 t->symtab_hdr.sh_link = t->strtab_section;
2731 for (sec = abfd->sections; sec; sec = sec->next)
2733 struct bfd_elf_section_data *d = elf_section_data (sec);
2737 i_shdrp[d->this_idx] = &d->this_hdr;
2738 if (d->rel_idx != 0)
2739 i_shdrp[d->rel_idx] = &d->rel_hdr;
2740 if (d->rel_idx2 != 0)
2741 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2743 /* Fill in the sh_link and sh_info fields while we're at it. */
2745 /* sh_link of a reloc section is the section index of the symbol
2746 table. sh_info is the section index of the section to which
2747 the relocation entries apply. */
2748 if (d->rel_idx != 0)
2750 d->rel_hdr.sh_link = t->symtab_section;
2751 d->rel_hdr.sh_info = d->this_idx;
2753 if (d->rel_idx2 != 0)
2755 d->rel_hdr2->sh_link = t->symtab_section;
2756 d->rel_hdr2->sh_info = d->this_idx;
2759 switch (d->this_hdr.sh_type)
2763 /* A reloc section which we are treating as a normal BFD
2764 section. sh_link is the section index of the symbol
2765 table. sh_info is the section index of the section to
2766 which the relocation entries apply. We assume that an
2767 allocated reloc section uses the dynamic symbol table.
2768 FIXME: How can we be sure? */
2769 s = bfd_get_section_by_name (abfd, ".dynsym");
2771 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2773 /* We look up the section the relocs apply to by name. */
2775 if (d->this_hdr.sh_type == SHT_REL)
2779 s = bfd_get_section_by_name (abfd, name);
2781 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2785 /* We assume that a section named .stab*str is a stabs
2786 string section. We look for a section with the same name
2787 but without the trailing ``str'', and set its sh_link
2788 field to point to this section. */
2789 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2790 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2795 len = strlen (sec->name);
2796 alc = bfd_malloc (len - 2);
2799 memcpy (alc, sec->name, len - 3);
2800 alc[len - 3] = '\0';
2801 s = bfd_get_section_by_name (abfd, alc);
2805 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2807 /* This is a .stab section. */
2808 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2809 elf_section_data (s)->this_hdr.sh_entsize
2810 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2817 case SHT_GNU_verneed:
2818 case SHT_GNU_verdef:
2819 /* sh_link is the section header index of the string table
2820 used for the dynamic entries, or the symbol table, or the
2822 s = bfd_get_section_by_name (abfd, ".dynstr");
2824 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2828 case SHT_GNU_versym:
2829 /* sh_link is the section header index of the symbol table
2830 this hash table or version table is for. */
2831 s = bfd_get_section_by_name (abfd, ".dynsym");
2833 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2837 d->this_hdr.sh_link = t->symtab_section;
2841 for (secn = 1; secn < section_number; ++secn)
2842 if (i_shdrp[secn] == NULL)
2843 i_shdrp[secn] = i_shdrp[0];
2845 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2846 i_shdrp[secn]->sh_name);
2850 /* Map symbol from it's internal number to the external number, moving
2851 all local symbols to be at the head of the list. */
2854 sym_is_global (bfd *abfd, asymbol *sym)
2856 /* If the backend has a special mapping, use it. */
2857 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2858 if (bed->elf_backend_sym_is_global)
2859 return (*bed->elf_backend_sym_is_global) (abfd, sym);
2861 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2862 || bfd_is_und_section (bfd_get_section (sym))
2863 || bfd_is_com_section (bfd_get_section (sym)));
2867 elf_map_symbols (bfd *abfd)
2869 unsigned int symcount = bfd_get_symcount (abfd);
2870 asymbol **syms = bfd_get_outsymbols (abfd);
2871 asymbol **sect_syms;
2872 unsigned int num_locals = 0;
2873 unsigned int num_globals = 0;
2874 unsigned int num_locals2 = 0;
2875 unsigned int num_globals2 = 0;
2883 fprintf (stderr, "elf_map_symbols\n");
2887 for (asect = abfd->sections; asect; asect = asect->next)
2889 if (max_index < asect->index)
2890 max_index = asect->index;
2894 amt = max_index * sizeof (asymbol *);
2895 sect_syms = bfd_zalloc (abfd, amt);
2896 if (sect_syms == NULL)
2898 elf_section_syms (abfd) = sect_syms;
2899 elf_num_section_syms (abfd) = max_index;
2901 /* Init sect_syms entries for any section symbols we have already
2902 decided to output. */
2903 for (idx = 0; idx < symcount; idx++)
2905 asymbol *sym = syms[idx];
2907 if ((sym->flags & BSF_SECTION_SYM) != 0
2914 if (sec->owner != NULL)
2916 if (sec->owner != abfd)
2918 if (sec->output_offset != 0)
2921 sec = sec->output_section;
2923 /* Empty sections in the input files may have had a
2924 section symbol created for them. (See the comment
2925 near the end of _bfd_generic_link_output_symbols in
2926 linker.c). If the linker script discards such
2927 sections then we will reach this point. Since we know
2928 that we cannot avoid this case, we detect it and skip
2929 the abort and the assignment to the sect_syms array.
2930 To reproduce this particular case try running the
2931 linker testsuite test ld-scripts/weak.exp for an ELF
2932 port that uses the generic linker. */
2933 if (sec->owner == NULL)
2936 BFD_ASSERT (sec->owner == abfd);
2938 sect_syms[sec->index] = syms[idx];
2943 /* Classify all of the symbols. */
2944 for (idx = 0; idx < symcount; idx++)
2946 if (!sym_is_global (abfd, syms[idx]))
2952 /* We will be adding a section symbol for each BFD section. Most normal
2953 sections will already have a section symbol in outsymbols, but
2954 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2955 at least in that case. */
2956 for (asect = abfd->sections; asect; asect = asect->next)
2958 if (sect_syms[asect->index] == NULL)
2960 if (!sym_is_global (abfd, asect->symbol))
2967 /* Now sort the symbols so the local symbols are first. */
2968 amt = (num_locals + num_globals) * sizeof (asymbol *);
2969 new_syms = bfd_alloc (abfd, amt);
2971 if (new_syms == NULL)
2974 for (idx = 0; idx < symcount; idx++)
2976 asymbol *sym = syms[idx];
2979 if (!sym_is_global (abfd, sym))
2982 i = num_locals + num_globals2++;
2984 sym->udata.i = i + 1;
2986 for (asect = abfd->sections; asect; asect = asect->next)
2988 if (sect_syms[asect->index] == NULL)
2990 asymbol *sym = asect->symbol;
2993 sect_syms[asect->index] = sym;
2994 if (!sym_is_global (abfd, sym))
2997 i = num_locals + num_globals2++;
2999 sym->udata.i = i + 1;
3003 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3005 elf_num_locals (abfd) = num_locals;
3006 elf_num_globals (abfd) = num_globals;
3010 /* Align to the maximum file alignment that could be required for any
3011 ELF data structure. */
3013 static inline file_ptr
3014 align_file_position (file_ptr off, int align)
3016 return (off + align - 1) & ~(align - 1);
3019 /* Assign a file position to a section, optionally aligning to the
3020 required section alignment. */
3023 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3031 al = i_shdrp->sh_addralign;
3033 offset = BFD_ALIGN (offset, al);
3035 i_shdrp->sh_offset = offset;
3036 if (i_shdrp->bfd_section != NULL)
3037 i_shdrp->bfd_section->filepos = offset;
3038 if (i_shdrp->sh_type != SHT_NOBITS)
3039 offset += i_shdrp->sh_size;
3043 /* Compute the file positions we are going to put the sections at, and
3044 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3045 is not NULL, this is being called by the ELF backend linker. */
3048 _bfd_elf_compute_section_file_positions (bfd *abfd,
3049 struct bfd_link_info *link_info)
3051 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3053 struct bfd_strtab_hash *strtab;
3054 Elf_Internal_Shdr *shstrtab_hdr;
3056 if (abfd->output_has_begun)
3059 /* Do any elf backend specific processing first. */
3060 if (bed->elf_backend_begin_write_processing)
3061 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3063 if (! prep_headers (abfd))
3066 /* Post process the headers if necessary. */
3067 if (bed->elf_backend_post_process_headers)
3068 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3071 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3075 if (!assign_section_numbers (abfd))
3078 /* The backend linker builds symbol table information itself. */
3079 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3081 /* Non-zero if doing a relocatable link. */
3082 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3084 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3088 if (link_info == NULL)
3090 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3095 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3096 /* sh_name was set in prep_headers. */
3097 shstrtab_hdr->sh_type = SHT_STRTAB;
3098 shstrtab_hdr->sh_flags = 0;
3099 shstrtab_hdr->sh_addr = 0;
3100 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3101 shstrtab_hdr->sh_entsize = 0;
3102 shstrtab_hdr->sh_link = 0;
3103 shstrtab_hdr->sh_info = 0;
3104 /* sh_offset is set in assign_file_positions_except_relocs. */
3105 shstrtab_hdr->sh_addralign = 1;
3107 if (!assign_file_positions_except_relocs (abfd, link_info))
3110 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3113 Elf_Internal_Shdr *hdr;
3115 off = elf_tdata (abfd)->next_file_pos;
3117 hdr = &elf_tdata (abfd)->symtab_hdr;
3118 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3120 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3121 if (hdr->sh_size != 0)
3122 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3124 hdr = &elf_tdata (abfd)->strtab_hdr;
3125 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3127 elf_tdata (abfd)->next_file_pos = off;
3129 /* Now that we know where the .strtab section goes, write it
3131 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3132 || ! _bfd_stringtab_emit (abfd, strtab))
3134 _bfd_stringtab_free (strtab);
3137 abfd->output_has_begun = TRUE;
3142 /* Create a mapping from a set of sections to a program segment. */
3144 static struct elf_segment_map *
3145 make_mapping (bfd *abfd,
3146 asection **sections,
3151 struct elf_segment_map *m;
3156 amt = sizeof (struct elf_segment_map);
3157 amt += (to - from - 1) * sizeof (asection *);
3158 m = bfd_zalloc (abfd, amt);
3162 m->p_type = PT_LOAD;
3163 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3164 m->sections[i - from] = *hdrpp;
3165 m->count = to - from;
3167 if (from == 0 && phdr)
3169 /* Include the headers in the first PT_LOAD segment. */
3170 m->includes_filehdr = 1;
3171 m->includes_phdrs = 1;
3177 /* Set up a mapping from BFD sections to program segments. */
3180 map_sections_to_segments (bfd *abfd)
3182 asection **sections = NULL;
3186 struct elf_segment_map *mfirst;
3187 struct elf_segment_map **pm;
3188 struct elf_segment_map *m;
3190 unsigned int phdr_index;
3191 bfd_vma maxpagesize;
3193 bfd_boolean phdr_in_segment = TRUE;
3194 bfd_boolean writable;
3196 asection *first_tls = NULL;
3197 asection *dynsec, *eh_frame_hdr;
3200 if (elf_tdata (abfd)->segment_map != NULL)
3203 if (bfd_count_sections (abfd) == 0)
3206 /* Select the allocated sections, and sort them. */
3208 amt = bfd_count_sections (abfd) * sizeof (asection *);
3209 sections = bfd_malloc (amt);
3210 if (sections == NULL)
3214 for (s = abfd->sections; s != NULL; s = s->next)
3216 if ((s->flags & SEC_ALLOC) != 0)
3222 BFD_ASSERT (i <= bfd_count_sections (abfd));
3225 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3227 /* Build the mapping. */
3232 /* If we have a .interp section, then create a PT_PHDR segment for
3233 the program headers and a PT_INTERP segment for the .interp
3235 s = bfd_get_section_by_name (abfd, ".interp");
3236 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3238 amt = sizeof (struct elf_segment_map);
3239 m = bfd_zalloc (abfd, amt);
3243 m->p_type = PT_PHDR;
3244 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3245 m->p_flags = PF_R | PF_X;
3246 m->p_flags_valid = 1;
3247 m->includes_phdrs = 1;
3252 amt = sizeof (struct elf_segment_map);
3253 m = bfd_zalloc (abfd, amt);
3257 m->p_type = PT_INTERP;
3265 /* Look through the sections. We put sections in the same program
3266 segment when the start of the second section can be placed within
3267 a few bytes of the end of the first section. */
3270 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3272 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3274 && (dynsec->flags & SEC_LOAD) == 0)
3277 /* Deal with -Ttext or something similar such that the first section
3278 is not adjacent to the program headers. This is an
3279 approximation, since at this point we don't know exactly how many
3280 program headers we will need. */
3283 bfd_size_type phdr_size;
3285 phdr_size = elf_tdata (abfd)->program_header_size;
3287 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3288 if ((abfd->flags & D_PAGED) == 0
3289 || sections[0]->lma < phdr_size
3290 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3291 phdr_in_segment = FALSE;
3294 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3297 bfd_boolean new_segment;
3301 /* See if this section and the last one will fit in the same
3304 if (last_hdr == NULL)
3306 /* If we don't have a segment yet, then we don't need a new
3307 one (we build the last one after this loop). */
3308 new_segment = FALSE;
3310 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3312 /* If this section has a different relation between the
3313 virtual address and the load address, then we need a new
3317 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3318 < BFD_ALIGN (hdr->lma, maxpagesize))
3320 /* If putting this section in this segment would force us to
3321 skip a page in the segment, then we need a new segment. */
3324 else if ((last_hdr->flags & SEC_LOAD) == 0
3325 && (hdr->flags & SEC_LOAD) != 0)
3327 /* We don't want to put a loadable section after a
3328 nonloadable section in the same segment. */
3331 else if ((abfd->flags & D_PAGED) == 0)
3333 /* If the file is not demand paged, which means that we
3334 don't require the sections to be correctly aligned in the
3335 file, then there is no other reason for a new segment. */
3336 new_segment = FALSE;
3339 && (hdr->flags & SEC_READONLY) == 0
3340 && (((last_hdr->lma + last_hdr->_raw_size - 1)
3341 & ~(maxpagesize - 1))
3342 != (hdr->lma & ~(maxpagesize - 1))))
3344 /* We don't want to put a writable section in a read only
3345 segment, unless they are on the same page in memory
3346 anyhow. We already know that the last section does not
3347 bring us past the current section on the page, so the
3348 only case in which the new section is not on the same
3349 page as the previous section is when the previous section
3350 ends precisely on a page boundary. */
3355 /* Otherwise, we can use the same segment. */
3356 new_segment = FALSE;
3361 if ((hdr->flags & SEC_READONLY) == 0)
3367 /* We need a new program segment. We must create a new program
3368 header holding all the sections from phdr_index until hdr. */
3370 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3377 if ((hdr->flags & SEC_READONLY) == 0)
3384 phdr_in_segment = FALSE;
3387 /* Create a final PT_LOAD program segment. */
3388 if (last_hdr != NULL)
3390 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3398 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3401 amt = sizeof (struct elf_segment_map);
3402 m = bfd_zalloc (abfd, amt);
3406 m->p_type = PT_DYNAMIC;
3408 m->sections[0] = dynsec;
3414 /* For each loadable .note section, add a PT_NOTE segment. We don't
3415 use bfd_get_section_by_name, because if we link together
3416 nonloadable .note sections and loadable .note sections, we will
3417 generate two .note sections in the output file. FIXME: Using
3418 names for section types is bogus anyhow. */
3419 for (s = abfd->sections; s != NULL; s = s->next)
3421 if ((s->flags & SEC_LOAD) != 0
3422 && strncmp (s->name, ".note", 5) == 0)
3424 amt = sizeof (struct elf_segment_map);
3425 m = bfd_zalloc (abfd, amt);
3429 m->p_type = PT_NOTE;
3436 if (s->flags & SEC_THREAD_LOCAL)
3444 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3449 amt = sizeof (struct elf_segment_map);
3450 amt += (tls_count - 1) * sizeof (asection *);
3451 m = bfd_zalloc (abfd, amt);
3456 m->count = tls_count;
3457 /* Mandated PF_R. */
3459 m->p_flags_valid = 1;
3460 for (i = 0; i < tls_count; ++i)
3462 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3463 m->sections[i] = first_tls;
3464 first_tls = first_tls->next;
3471 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3473 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3474 if (eh_frame_hdr != NULL
3475 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3477 amt = sizeof (struct elf_segment_map);
3478 m = bfd_zalloc (abfd, amt);
3482 m->p_type = PT_GNU_EH_FRAME;
3484 m->sections[0] = eh_frame_hdr->output_section;
3490 if (elf_tdata (abfd)->stack_flags)
3492 amt = sizeof (struct elf_segment_map);
3493 m = bfd_zalloc (abfd, amt);
3497 m->p_type = PT_GNU_STACK;
3498 m->p_flags = elf_tdata (abfd)->stack_flags;
3499 m->p_flags_valid = 1;
3508 elf_tdata (abfd)->segment_map = mfirst;
3512 if (sections != NULL)
3517 /* Sort sections by address. */
3520 elf_sort_sections (const void *arg1, const void *arg2)
3522 const asection *sec1 = *(const asection **) arg1;
3523 const asection *sec2 = *(const asection **) arg2;
3524 bfd_size_type size1, size2;
3526 /* Sort by LMA first, since this is the address used to
3527 place the section into a segment. */
3528 if (sec1->lma < sec2->lma)
3530 else if (sec1->lma > sec2->lma)
3533 /* Then sort by VMA. Normally the LMA and the VMA will be
3534 the same, and this will do nothing. */
3535 if (sec1->vma < sec2->vma)
3537 else if (sec1->vma > sec2->vma)
3540 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3542 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3548 /* If the indicies are the same, do not return 0
3549 here, but continue to try the next comparison. */
3550 if (sec1->target_index - sec2->target_index != 0)
3551 return sec1->target_index - sec2->target_index;
3556 else if (TOEND (sec2))
3561 /* Sort by size, to put zero sized sections
3562 before others at the same address. */
3564 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3565 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3572 return sec1->target_index - sec2->target_index;
3575 /* Ian Lance Taylor writes:
3577 We shouldn't be using % with a negative signed number. That's just
3578 not good. We have to make sure either that the number is not
3579 negative, or that the number has an unsigned type. When the types
3580 are all the same size they wind up as unsigned. When file_ptr is a
3581 larger signed type, the arithmetic winds up as signed long long,
3584 What we're trying to say here is something like ``increase OFF by
3585 the least amount that will cause it to be equal to the VMA modulo
3587 /* In other words, something like:
3589 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3590 off_offset = off % bed->maxpagesize;
3591 if (vma_offset < off_offset)
3592 adjustment = vma_offset + bed->maxpagesize - off_offset;
3594 adjustment = vma_offset - off_offset;
3596 which can can be collapsed into the expression below. */
3599 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
3601 return ((vma - off) % maxpagesize);
3604 /* Assign file positions to the sections based on the mapping from
3605 sections to segments. This function also sets up some fields in
3606 the file header, and writes out the program headers. */
3609 assign_file_positions_for_segments (bfd *abfd, struct bfd_link_info *link_info)
3611 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3613 struct elf_segment_map *m;
3615 Elf_Internal_Phdr *phdrs;
3617 bfd_vma filehdr_vaddr, filehdr_paddr;
3618 bfd_vma phdrs_vaddr, phdrs_paddr;
3619 Elf_Internal_Phdr *p;
3622 if (elf_tdata (abfd)->segment_map == NULL)
3624 if (! map_sections_to_segments (abfd))
3629 /* The placement algorithm assumes that non allocated sections are
3630 not in PT_LOAD segments. We ensure this here by removing such
3631 sections from the segment map. */
3632 for (m = elf_tdata (abfd)->segment_map;
3636 unsigned int new_count;
3639 if (m->p_type != PT_LOAD)
3643 for (i = 0; i < m->count; i ++)
3645 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3648 m->sections[new_count] = m->sections[i];
3654 if (new_count != m->count)
3655 m->count = new_count;
3659 if (bed->elf_backend_modify_segment_map)
3661 if (! (*bed->elf_backend_modify_segment_map) (abfd, link_info))
3666 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3669 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3670 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3671 elf_elfheader (abfd)->e_phnum = count;
3676 /* If we already counted the number of program segments, make sure
3677 that we allocated enough space. This happens when SIZEOF_HEADERS
3678 is used in a linker script. */
3679 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3680 if (alloc != 0 && count > alloc)
3682 ((*_bfd_error_handler)
3683 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3684 bfd_get_filename (abfd), alloc, count));
3685 bfd_set_error (bfd_error_bad_value);
3692 amt = alloc * sizeof (Elf_Internal_Phdr);
3693 phdrs = bfd_alloc (abfd, amt);
3697 off = bed->s->sizeof_ehdr;
3698 off += alloc * bed->s->sizeof_phdr;
3705 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3712 /* If elf_segment_map is not from map_sections_to_segments, the
3713 sections may not be correctly ordered. NOTE: sorting should
3714 not be done to the PT_NOTE section of a corefile, which may
3715 contain several pseudo-sections artificially created by bfd.
3716 Sorting these pseudo-sections breaks things badly. */
3718 && !(elf_elfheader (abfd)->e_type == ET_CORE
3719 && m->p_type == PT_NOTE))
3720 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3723 p->p_type = m->p_type;
3724 p->p_flags = m->p_flags;
3726 if (p->p_type == PT_LOAD
3728 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3730 if ((abfd->flags & D_PAGED) != 0)
3731 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3735 bfd_size_type align;
3738 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3740 bfd_size_type secalign;
3742 secalign = bfd_get_section_alignment (abfd, *secpp);
3743 if (secalign > align)
3747 off += vma_page_aligned_bias (m->sections[0]->vma, off,
3755 p->p_vaddr = m->sections[0]->vma;
3757 if (m->p_paddr_valid)
3758 p->p_paddr = m->p_paddr;
3759 else if (m->count == 0)
3762 p->p_paddr = m->sections[0]->lma;
3764 if (p->p_type == PT_LOAD
3765 && (abfd->flags & D_PAGED) != 0)
3766 p->p_align = bed->maxpagesize;
3767 else if (m->count == 0)
3768 p->p_align = 1 << bed->s->log_file_align;
3776 if (m->includes_filehdr)
3778 if (! m->p_flags_valid)
3781 p->p_filesz = bed->s->sizeof_ehdr;
3782 p->p_memsz = bed->s->sizeof_ehdr;
3785 BFD_ASSERT (p->p_type == PT_LOAD);
3787 if (p->p_vaddr < (bfd_vma) off)
3789 (*_bfd_error_handler)
3790 (_("%s: Not enough room for program headers, try linking with -N"),
3791 bfd_get_filename (abfd));
3792 bfd_set_error (bfd_error_bad_value);
3797 if (! m->p_paddr_valid)
3800 if (p->p_type == PT_LOAD)
3802 filehdr_vaddr = p->p_vaddr;
3803 filehdr_paddr = p->p_paddr;
3807 if (m->includes_phdrs)
3809 if (! m->p_flags_valid)
3812 if (m->includes_filehdr)
3814 if (p->p_type == PT_LOAD)
3816 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3817 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3822 p->p_offset = bed->s->sizeof_ehdr;
3826 BFD_ASSERT (p->p_type == PT_LOAD);
3827 p->p_vaddr -= off - p->p_offset;
3828 if (! m->p_paddr_valid)
3829 p->p_paddr -= off - p->p_offset;
3832 if (p->p_type == PT_LOAD)
3834 phdrs_vaddr = p->p_vaddr;
3835 phdrs_paddr = p->p_paddr;
3838 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3841 p->p_filesz += alloc * bed->s->sizeof_phdr;
3842 p->p_memsz += alloc * bed->s->sizeof_phdr;
3845 if (p->p_type == PT_LOAD
3846 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3848 if (! m->includes_filehdr && ! m->includes_phdrs)
3854 adjust = off - (p->p_offset + p->p_filesz);
3855 p->p_filesz += adjust;
3856 p->p_memsz += adjust;
3862 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3866 bfd_size_type align;
3870 align = 1 << bfd_get_section_alignment (abfd, sec);
3872 /* The section may have artificial alignment forced by a
3873 link script. Notice this case by the gap between the
3874 cumulative phdr lma and the section's lma. */
3875 if (p->p_paddr + p->p_memsz < sec->lma)
3877 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3879 p->p_memsz += adjust;
3880 if (p->p_type == PT_LOAD
3881 || (p->p_type == PT_NOTE
3882 && bfd_get_format (abfd) == bfd_core))
3887 if ((flags & SEC_LOAD) != 0
3888 || (flags & SEC_THREAD_LOCAL) != 0)
3889 p->p_filesz += adjust;
3892 if (p->p_type == PT_LOAD)
3894 bfd_signed_vma adjust;
3896 if ((flags & SEC_LOAD) != 0)
3898 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3902 else if ((flags & SEC_ALLOC) != 0)
3904 /* The section VMA must equal the file position
3905 modulo the page size. FIXME: I'm not sure if
3906 this adjustment is really necessary. We used to
3907 not have the SEC_LOAD case just above, and then
3908 this was necessary, but now I'm not sure. */
3909 if ((abfd->flags & D_PAGED) != 0)
3910 adjust = vma_page_aligned_bias (sec->vma, voff,
3913 adjust = vma_page_aligned_bias (sec->vma, voff,
3923 (* _bfd_error_handler) (_("\
3924 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3925 bfd_section_name (abfd, sec),
3930 p->p_memsz += adjust;
3933 if ((flags & SEC_LOAD) != 0)
3934 p->p_filesz += adjust;
3939 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3940 used in a linker script we may have a section with
3941 SEC_LOAD clear but which is supposed to have
3943 if ((flags & SEC_LOAD) != 0
3944 || (flags & SEC_HAS_CONTENTS) != 0)
3945 off += sec->_raw_size;
3947 if ((flags & SEC_ALLOC) != 0
3948 && ((flags & SEC_LOAD) != 0
3949 || (flags & SEC_THREAD_LOCAL) == 0))
3950 voff += sec->_raw_size;
3953 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3955 /* The actual "note" segment has i == 0.
3956 This is the one that actually contains everything. */
3960 p->p_filesz = sec->_raw_size;
3961 off += sec->_raw_size;
3966 /* Fake sections -- don't need to be written. */
3969 flags = sec->flags = 0;
3976 if ((sec->flags & SEC_LOAD) != 0
3977 || (sec->flags & SEC_THREAD_LOCAL) == 0
3978 || p->p_type == PT_TLS)
3979 p->p_memsz += sec->_raw_size;
3981 if ((flags & SEC_LOAD) != 0)
3982 p->p_filesz += sec->_raw_size;
3984 if (p->p_type == PT_TLS
3985 && sec->_raw_size == 0
3986 && (sec->flags & SEC_HAS_CONTENTS) == 0)
3988 struct bfd_link_order *o;
3989 bfd_vma tbss_size = 0;
3991 for (o = sec->link_order_head; o != NULL; o = o->next)
3992 if (tbss_size < o->offset + o->size)
3993 tbss_size = o->offset + o->size;
3995 p->p_memsz += tbss_size;
3998 if (align > p->p_align
3999 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4003 if (! m->p_flags_valid)
4006 if ((flags & SEC_CODE) != 0)
4008 if ((flags & SEC_READONLY) == 0)
4014 /* Now that we have set the section file positions, we can set up
4015 the file positions for the non PT_LOAD segments. */
4016 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4020 if (p->p_type != PT_LOAD && m->count > 0)
4022 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4023 p->p_offset = m->sections[0]->filepos;
4027 if (m->includes_filehdr)
4029 p->p_vaddr = filehdr_vaddr;
4030 if (! m->p_paddr_valid)
4031 p->p_paddr = filehdr_paddr;
4033 else if (m->includes_phdrs)
4035 p->p_vaddr = phdrs_vaddr;
4036 if (! m->p_paddr_valid)
4037 p->p_paddr = phdrs_paddr;
4042 /* Clear out any program headers we allocated but did not use. */
4043 for (; count < alloc; count++, p++)
4045 memset (p, 0, sizeof *p);
4046 p->p_type = PT_NULL;
4049 elf_tdata (abfd)->phdr = phdrs;
4051 elf_tdata (abfd)->next_file_pos = off;
4053 /* Write out the program headers. */
4054 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4055 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4061 /* Get the size of the program header.
4063 If this is called by the linker before any of the section VMA's are set, it
4064 can't calculate the correct value for a strange memory layout. This only
4065 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4066 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4067 data segment (exclusive of .interp and .dynamic).
4069 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4070 will be two segments. */
4072 static bfd_size_type
4073 get_program_header_size (bfd *abfd)
4077 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4079 /* We can't return a different result each time we're called. */
4080 if (elf_tdata (abfd)->program_header_size != 0)
4081 return elf_tdata (abfd)->program_header_size;
4083 if (elf_tdata (abfd)->segment_map != NULL)
4085 struct elf_segment_map *m;
4088 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4090 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4091 return elf_tdata (abfd)->program_header_size;
4094 /* Assume we will need exactly two PT_LOAD segments: one for text
4095 and one for data. */
4098 s = bfd_get_section_by_name (abfd, ".interp");
4099 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4101 /* If we have a loadable interpreter section, we need a
4102 PT_INTERP segment. In this case, assume we also need a
4103 PT_PHDR segment, although that may not be true for all
4108 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4110 /* We need a PT_DYNAMIC segment. */
4114 if (elf_tdata (abfd)->eh_frame_hdr)
4116 /* We need a PT_GNU_EH_FRAME segment. */
4120 if (elf_tdata (abfd)->stack_flags)
4122 /* We need a PT_GNU_STACK segment. */
4126 for (s = abfd->sections; s != NULL; s = s->next)
4128 if ((s->flags & SEC_LOAD) != 0
4129 && strncmp (s->name, ".note", 5) == 0)
4131 /* We need a PT_NOTE segment. */
4136 for (s = abfd->sections; s != NULL; s = s->next)
4138 if (s->flags & SEC_THREAD_LOCAL)
4140 /* We need a PT_TLS segment. */
4146 /* Let the backend count up any program headers it might need. */
4147 if (bed->elf_backend_additional_program_headers)
4151 a = (*bed->elf_backend_additional_program_headers) (abfd);
4157 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4158 return elf_tdata (abfd)->program_header_size;
4161 /* Work out the file positions of all the sections. This is called by
4162 _bfd_elf_compute_section_file_positions. All the section sizes and
4163 VMAs must be known before this is called.
4165 We do not consider reloc sections at this point, unless they form
4166 part of the loadable image. Reloc sections are assigned file
4167 positions in assign_file_positions_for_relocs, which is called by
4168 write_object_contents and final_link.
4170 We also don't set the positions of the .symtab and .strtab here. */
4173 assign_file_positions_except_relocs (bfd *abfd,
4174 struct bfd_link_info *link_info)
4176 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4177 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4178 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4179 unsigned int num_sec = elf_numsections (abfd);
4181 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4183 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4184 && bfd_get_format (abfd) != bfd_core)
4186 Elf_Internal_Shdr **hdrpp;
4189 /* Start after the ELF header. */
4190 off = i_ehdrp->e_ehsize;
4192 /* We are not creating an executable, which means that we are
4193 not creating a program header, and that the actual order of
4194 the sections in the file is unimportant. */
4195 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4197 Elf_Internal_Shdr *hdr;
4200 if (hdr->sh_type == SHT_REL
4201 || hdr->sh_type == SHT_RELA
4202 || i == tdata->symtab_section
4203 || i == tdata->symtab_shndx_section
4204 || i == tdata->strtab_section)
4206 hdr->sh_offset = -1;
4209 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4211 if (i == SHN_LORESERVE - 1)
4213 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4214 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4221 Elf_Internal_Shdr **hdrpp;
4223 /* Assign file positions for the loaded sections based on the
4224 assignment of sections to segments. */
4225 if (! assign_file_positions_for_segments (abfd, link_info))
4228 /* Assign file positions for the other sections. */
4230 off = elf_tdata (abfd)->next_file_pos;
4231 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4233 Elf_Internal_Shdr *hdr;
4236 if (hdr->bfd_section != NULL
4237 && hdr->bfd_section->filepos != 0)
4238 hdr->sh_offset = hdr->bfd_section->filepos;
4239 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4241 ((*_bfd_error_handler)
4242 (_("%s: warning: allocated section `%s' not in segment"),
4243 bfd_get_filename (abfd),
4244 (hdr->bfd_section == NULL
4246 : hdr->bfd_section->name)));
4247 if ((abfd->flags & D_PAGED) != 0)
4248 off += vma_page_aligned_bias (hdr->sh_addr, off,
4251 off += vma_page_aligned_bias (hdr->sh_addr, off,
4253 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4256 else if (hdr->sh_type == SHT_REL
4257 || hdr->sh_type == SHT_RELA
4258 || hdr == i_shdrpp[tdata->symtab_section]
4259 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4260 || hdr == i_shdrpp[tdata->strtab_section])
4261 hdr->sh_offset = -1;
4263 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4265 if (i == SHN_LORESERVE - 1)
4267 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4268 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4273 /* Place the section headers. */
4274 off = align_file_position (off, 1 << bed->s->log_file_align);
4275 i_ehdrp->e_shoff = off;
4276 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4278 elf_tdata (abfd)->next_file_pos = off;
4284 prep_headers (bfd *abfd)
4286 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4287 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4288 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4289 struct elf_strtab_hash *shstrtab;
4290 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4292 i_ehdrp = elf_elfheader (abfd);
4293 i_shdrp = elf_elfsections (abfd);
4295 shstrtab = _bfd_elf_strtab_init ();
4296 if (shstrtab == NULL)
4299 elf_shstrtab (abfd) = shstrtab;
4301 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4302 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4303 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4304 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4306 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4307 i_ehdrp->e_ident[EI_DATA] =
4308 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4309 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4311 if ((abfd->flags & DYNAMIC) != 0)
4312 i_ehdrp->e_type = ET_DYN;
4313 else if ((abfd->flags & EXEC_P) != 0)
4314 i_ehdrp->e_type = ET_EXEC;
4315 else if (bfd_get_format (abfd) == bfd_core)
4316 i_ehdrp->e_type = ET_CORE;
4318 i_ehdrp->e_type = ET_REL;
4320 switch (bfd_get_arch (abfd))
4322 case bfd_arch_unknown:
4323 i_ehdrp->e_machine = EM_NONE;
4326 /* There used to be a long list of cases here, each one setting
4327 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4328 in the corresponding bfd definition. To avoid duplication,
4329 the switch was removed. Machines that need special handling
4330 can generally do it in elf_backend_final_write_processing(),
4331 unless they need the information earlier than the final write.
4332 Such need can generally be supplied by replacing the tests for
4333 e_machine with the conditions used to determine it. */
4335 i_ehdrp->e_machine = bed->elf_machine_code;
4338 i_ehdrp->e_version = bed->s->ev_current;
4339 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4341 /* No program header, for now. */
4342 i_ehdrp->e_phoff = 0;
4343 i_ehdrp->e_phentsize = 0;
4344 i_ehdrp->e_phnum = 0;
4346 /* Each bfd section is section header entry. */
4347 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4348 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4350 /* If we're building an executable, we'll need a program header table. */
4351 if (abfd->flags & EXEC_P)
4353 /* It all happens later. */
4355 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4357 /* elf_build_phdrs() returns a (NULL-terminated) array of
4358 Elf_Internal_Phdrs. */
4359 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4360 i_ehdrp->e_phoff = outbase;
4361 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4366 i_ehdrp->e_phentsize = 0;
4368 i_ehdrp->e_phoff = 0;
4371 elf_tdata (abfd)->symtab_hdr.sh_name =
4372 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4373 elf_tdata (abfd)->strtab_hdr.sh_name =
4374 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4375 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4376 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4377 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4378 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4379 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4385 /* Assign file positions for all the reloc sections which are not part
4386 of the loadable file image. */
4389 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
4392 unsigned int i, num_sec;
4393 Elf_Internal_Shdr **shdrpp;
4395 off = elf_tdata (abfd)->next_file_pos;
4397 num_sec = elf_numsections (abfd);
4398 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4400 Elf_Internal_Shdr *shdrp;
4403 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4404 && shdrp->sh_offset == -1)
4405 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4408 elf_tdata (abfd)->next_file_pos = off;
4412 _bfd_elf_write_object_contents (bfd *abfd)
4414 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4415 Elf_Internal_Ehdr *i_ehdrp;
4416 Elf_Internal_Shdr **i_shdrp;
4418 unsigned int count, num_sec;
4420 if (! abfd->output_has_begun
4421 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
4424 i_shdrp = elf_elfsections (abfd);
4425 i_ehdrp = elf_elfheader (abfd);
4428 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4432 _bfd_elf_assign_file_positions_for_relocs (abfd);
4434 /* After writing the headers, we need to write the sections too... */
4435 num_sec = elf_numsections (abfd);
4436 for (count = 1; count < num_sec; count++)
4438 if (bed->elf_backend_section_processing)
4439 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4440 if (i_shdrp[count]->contents)
4442 bfd_size_type amt = i_shdrp[count]->sh_size;
4444 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4445 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4448 if (count == SHN_LORESERVE - 1)
4449 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4452 /* Write out the section header names. */
4453 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4454 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4457 if (bed->elf_backend_final_write_processing)
4458 (*bed->elf_backend_final_write_processing) (abfd,
4459 elf_tdata (abfd)->linker);
4461 return bed->s->write_shdrs_and_ehdr (abfd);
4465 _bfd_elf_write_corefile_contents (bfd *abfd)
4467 /* Hopefully this can be done just like an object file. */
4468 return _bfd_elf_write_object_contents (abfd);
4471 /* Given a section, search the header to find them. */
4474 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
4476 const struct elf_backend_data *bed;
4479 if (elf_section_data (asect) != NULL
4480 && elf_section_data (asect)->this_idx != 0)
4481 return elf_section_data (asect)->this_idx;
4483 if (bfd_is_abs_section (asect))
4485 else if (bfd_is_com_section (asect))
4487 else if (bfd_is_und_section (asect))
4491 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4492 int maxindex = elf_numsections (abfd);
4494 for (index = 1; index < maxindex; index++)
4496 Elf_Internal_Shdr *hdr = i_shdrp[index];
4498 if (hdr != NULL && hdr->bfd_section == asect)
4504 bed = get_elf_backend_data (abfd);
4505 if (bed->elf_backend_section_from_bfd_section)
4509 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4514 bfd_set_error (bfd_error_nonrepresentable_section);
4519 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4523 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
4525 asymbol *asym_ptr = *asym_ptr_ptr;
4527 flagword flags = asym_ptr->flags;
4529 /* When gas creates relocations against local labels, it creates its
4530 own symbol for the section, but does put the symbol into the
4531 symbol chain, so udata is 0. When the linker is generating
4532 relocatable output, this section symbol may be for one of the
4533 input sections rather than the output section. */
4534 if (asym_ptr->udata.i == 0
4535 && (flags & BSF_SECTION_SYM)
4536 && asym_ptr->section)
4540 if (asym_ptr->section->output_section != NULL)
4541 indx = asym_ptr->section->output_section->index;
4543 indx = asym_ptr->section->index;
4544 if (indx < elf_num_section_syms (abfd)
4545 && elf_section_syms (abfd)[indx] != NULL)
4546 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4549 idx = asym_ptr->udata.i;
4553 /* This case can occur when using --strip-symbol on a symbol
4554 which is used in a relocation entry. */
4555 (*_bfd_error_handler)
4556 (_("%s: symbol `%s' required but not present"),
4557 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4558 bfd_set_error (bfd_error_no_symbols);
4565 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4566 (long) asym_ptr, asym_ptr->name, idx, flags,
4567 elf_symbol_flags (flags));
4575 /* Copy private BFD data. This copies any program header information. */
4578 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4580 Elf_Internal_Ehdr *iehdr;
4581 struct elf_segment_map *map;
4582 struct elf_segment_map *map_first;
4583 struct elf_segment_map **pointer_to_map;
4584 Elf_Internal_Phdr *segment;
4587 unsigned int num_segments;
4588 bfd_boolean phdr_included = FALSE;
4589 bfd_vma maxpagesize;
4590 struct elf_segment_map *phdr_adjust_seg = NULL;
4591 unsigned int phdr_adjust_num = 0;
4592 const struct elf_backend_data *bed;
4594 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4595 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4598 if (elf_tdata (ibfd)->phdr == NULL)
4601 bed = get_elf_backend_data (ibfd);
4602 iehdr = elf_elfheader (ibfd);
4605 pointer_to_map = &map_first;
4607 num_segments = elf_elfheader (ibfd)->e_phnum;
4608 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4610 /* Returns the end address of the segment + 1. */
4611 #define SEGMENT_END(segment, start) \
4612 (start + (segment->p_memsz > segment->p_filesz \
4613 ? segment->p_memsz : segment->p_filesz))
4615 #define SECTION_SIZE(section, segment) \
4616 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4617 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4618 ? section->_raw_size : 0)
4620 /* Returns TRUE if the given section is contained within
4621 the given segment. VMA addresses are compared. */
4622 #define IS_CONTAINED_BY_VMA(section, segment) \
4623 (section->vma >= segment->p_vaddr \
4624 && (section->vma + SECTION_SIZE (section, segment) \
4625 <= (SEGMENT_END (segment, segment->p_vaddr))))
4627 /* Returns TRUE if the given section is contained within
4628 the given segment. LMA addresses are compared. */
4629 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4630 (section->lma >= base \
4631 && (section->lma + SECTION_SIZE (section, segment) \
4632 <= SEGMENT_END (segment, base)))
4634 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4635 #define IS_COREFILE_NOTE(p, s) \
4636 (p->p_type == PT_NOTE \
4637 && bfd_get_format (ibfd) == bfd_core \
4638 && s->vma == 0 && s->lma == 0 \
4639 && (bfd_vma) s->filepos >= p->p_offset \
4640 && ((bfd_vma) s->filepos + s->_raw_size \
4641 <= p->p_offset + p->p_filesz))
4643 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4644 linker, which generates a PT_INTERP section with p_vaddr and
4645 p_memsz set to 0. */
4646 #define IS_SOLARIS_PT_INTERP(p, s) \
4648 && p->p_paddr == 0 \
4649 && p->p_memsz == 0 \
4650 && p->p_filesz > 0 \
4651 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4652 && s->_raw_size > 0 \
4653 && (bfd_vma) s->filepos >= p->p_offset \
4654 && ((bfd_vma) s->filepos + s->_raw_size \
4655 <= p->p_offset + p->p_filesz))
4657 /* Decide if the given section should be included in the given segment.
4658 A section will be included if:
4659 1. It is within the address space of the segment -- we use the LMA
4660 if that is set for the segment and the VMA otherwise,
4661 2. It is an allocated segment,
4662 3. There is an output section associated with it,
4663 4. The section has not already been allocated to a previous segment.
4664 5. PT_GNU_STACK segments do not include any sections.
4665 6. PT_TLS segment includes only SHF_TLS sections.
4666 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4667 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4668 ((((segment->p_paddr \
4669 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4670 : IS_CONTAINED_BY_VMA (section, segment)) \
4671 && (section->flags & SEC_ALLOC) != 0) \
4672 || IS_COREFILE_NOTE (segment, section)) \
4673 && section->output_section != NULL \
4674 && segment->p_type != PT_GNU_STACK \
4675 && (segment->p_type != PT_TLS \
4676 || (section->flags & SEC_THREAD_LOCAL)) \
4677 && (segment->p_type == PT_LOAD \
4678 || segment->p_type == PT_TLS \
4679 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4680 && ! section->segment_mark)
4682 /* Returns TRUE iff seg1 starts after the end of seg2. */
4683 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4684 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4686 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4687 their VMA address ranges and their LMA address ranges overlap.
4688 It is possible to have overlapping VMA ranges without overlapping LMA
4689 ranges. RedBoot images for example can have both .data and .bss mapped
4690 to the same VMA range, but with the .data section mapped to a different
4692 #define SEGMENT_OVERLAPS(seg1, seg2) \
4693 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4694 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4695 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4696 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4698 /* Initialise the segment mark field. */
4699 for (section = ibfd->sections; section != NULL; section = section->next)
4700 section->segment_mark = FALSE;
4702 /* Scan through the segments specified in the program header
4703 of the input BFD. For this first scan we look for overlaps
4704 in the loadable segments. These can be created by weird
4705 parameters to objcopy. Also, fix some solaris weirdness. */
4706 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4711 Elf_Internal_Phdr *segment2;
4713 if (segment->p_type == PT_INTERP)
4714 for (section = ibfd->sections; section; section = section->next)
4715 if (IS_SOLARIS_PT_INTERP (segment, section))
4717 /* Mininal change so that the normal section to segment
4718 assignment code will work. */
4719 segment->p_vaddr = section->vma;
4723 if (segment->p_type != PT_LOAD)
4726 /* Determine if this segment overlaps any previous segments. */
4727 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4729 bfd_signed_vma extra_length;
4731 if (segment2->p_type != PT_LOAD
4732 || ! SEGMENT_OVERLAPS (segment, segment2))
4735 /* Merge the two segments together. */
4736 if (segment2->p_vaddr < segment->p_vaddr)
4738 /* Extend SEGMENT2 to include SEGMENT and then delete
4741 SEGMENT_END (segment, segment->p_vaddr)
4742 - SEGMENT_END (segment2, segment2->p_vaddr);
4744 if (extra_length > 0)
4746 segment2->p_memsz += extra_length;
4747 segment2->p_filesz += extra_length;
4750 segment->p_type = PT_NULL;
4752 /* Since we have deleted P we must restart the outer loop. */
4754 segment = elf_tdata (ibfd)->phdr;
4759 /* Extend SEGMENT to include SEGMENT2 and then delete
4762 SEGMENT_END (segment2, segment2->p_vaddr)
4763 - SEGMENT_END (segment, segment->p_vaddr);
4765 if (extra_length > 0)
4767 segment->p_memsz += extra_length;
4768 segment->p_filesz += extra_length;
4771 segment2->p_type = PT_NULL;
4776 /* The second scan attempts to assign sections to segments. */
4777 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4781 unsigned int section_count;
4782 asection ** sections;
4783 asection * output_section;
4785 bfd_vma matching_lma;
4786 bfd_vma suggested_lma;
4790 if (segment->p_type == PT_NULL)
4793 /* Compute how many sections might be placed into this segment. */
4794 for (section = ibfd->sections, section_count = 0;
4796 section = section->next)
4797 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4800 /* Allocate a segment map big enough to contain
4801 all of the sections we have selected. */
4802 amt = sizeof (struct elf_segment_map);
4803 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4804 map = bfd_alloc (obfd, amt);
4808 /* Initialise the fields of the segment map. Default to
4809 using the physical address of the segment in the input BFD. */
4811 map->p_type = segment->p_type;
4812 map->p_flags = segment->p_flags;
4813 map->p_flags_valid = 1;
4814 map->p_paddr = segment->p_paddr;
4815 map->p_paddr_valid = 1;
4817 /* Determine if this segment contains the ELF file header
4818 and if it contains the program headers themselves. */
4819 map->includes_filehdr = (segment->p_offset == 0
4820 && segment->p_filesz >= iehdr->e_ehsize);
4822 map->includes_phdrs = 0;
4824 if (! phdr_included || segment->p_type != PT_LOAD)
4826 map->includes_phdrs =
4827 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4828 && (segment->p_offset + segment->p_filesz
4829 >= ((bfd_vma) iehdr->e_phoff
4830 + iehdr->e_phnum * iehdr->e_phentsize)));
4832 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4833 phdr_included = TRUE;
4836 if (section_count == 0)
4838 /* Special segments, such as the PT_PHDR segment, may contain
4839 no sections, but ordinary, loadable segments should contain
4840 something. They are allowed by the ELF spec however, so only
4841 a warning is produced. */
4842 if (segment->p_type == PT_LOAD)
4843 (*_bfd_error_handler)
4844 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4845 bfd_archive_filename (ibfd));
4848 *pointer_to_map = map;
4849 pointer_to_map = &map->next;
4854 /* Now scan the sections in the input BFD again and attempt
4855 to add their corresponding output sections to the segment map.
4856 The problem here is how to handle an output section which has
4857 been moved (ie had its LMA changed). There are four possibilities:
4859 1. None of the sections have been moved.
4860 In this case we can continue to use the segment LMA from the
4863 2. All of the sections have been moved by the same amount.
4864 In this case we can change the segment's LMA to match the LMA
4865 of the first section.
4867 3. Some of the sections have been moved, others have not.
4868 In this case those sections which have not been moved can be
4869 placed in the current segment which will have to have its size,
4870 and possibly its LMA changed, and a new segment or segments will
4871 have to be created to contain the other sections.
4873 4. The sections have been moved, but not by the same amount.
4874 In this case we can change the segment's LMA to match the LMA
4875 of the first section and we will have to create a new segment
4876 or segments to contain the other sections.
4878 In order to save time, we allocate an array to hold the section
4879 pointers that we are interested in. As these sections get assigned
4880 to a segment, they are removed from this array. */
4882 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4883 to work around this long long bug. */
4884 amt = section_count * sizeof (asection *);
4885 sections = bfd_malloc (amt);
4886 if (sections == NULL)
4889 /* Step One: Scan for segment vs section LMA conflicts.
4890 Also add the sections to the section array allocated above.
4891 Also add the sections to the current segment. In the common
4892 case, where the sections have not been moved, this means that
4893 we have completely filled the segment, and there is nothing
4899 for (j = 0, section = ibfd->sections;
4901 section = section->next)
4903 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4905 output_section = section->output_section;
4907 sections[j ++] = section;
4909 /* The Solaris native linker always sets p_paddr to 0.
4910 We try to catch that case here, and set it to the
4911 correct value. Note - some backends require that
4912 p_paddr be left as zero. */
4913 if (segment->p_paddr == 0
4914 && segment->p_vaddr != 0
4915 && (! bed->want_p_paddr_set_to_zero)
4917 && output_section->lma != 0
4918 && (output_section->vma == (segment->p_vaddr
4919 + (map->includes_filehdr
4922 + (map->includes_phdrs
4924 * iehdr->e_phentsize)
4926 map->p_paddr = segment->p_vaddr;
4928 /* Match up the physical address of the segment with the
4929 LMA address of the output section. */
4930 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4931 || IS_COREFILE_NOTE (segment, section)
4932 || (bed->want_p_paddr_set_to_zero &&
4933 IS_CONTAINED_BY_VMA (output_section, segment))
4936 if (matching_lma == 0)
4937 matching_lma = output_section->lma;
4939 /* We assume that if the section fits within the segment
4940 then it does not overlap any other section within that
4942 map->sections[isec ++] = output_section;
4944 else if (suggested_lma == 0)
4945 suggested_lma = output_section->lma;
4949 BFD_ASSERT (j == section_count);
4951 /* Step Two: Adjust the physical address of the current segment,
4953 if (isec == section_count)
4955 /* All of the sections fitted within the segment as currently
4956 specified. This is the default case. Add the segment to
4957 the list of built segments and carry on to process the next
4958 program header in the input BFD. */
4959 map->count = section_count;
4960 *pointer_to_map = map;
4961 pointer_to_map = &map->next;
4968 if (matching_lma != 0)
4970 /* At least one section fits inside the current segment.
4971 Keep it, but modify its physical address to match the
4972 LMA of the first section that fitted. */
4973 map->p_paddr = matching_lma;
4977 /* None of the sections fitted inside the current segment.
4978 Change the current segment's physical address to match
4979 the LMA of the first section. */
4980 map->p_paddr = suggested_lma;
4983 /* Offset the segment physical address from the lma
4984 to allow for space taken up by elf headers. */
4985 if (map->includes_filehdr)
4986 map->p_paddr -= iehdr->e_ehsize;
4988 if (map->includes_phdrs)
4990 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
4992 /* iehdr->e_phnum is just an estimate of the number
4993 of program headers that we will need. Make a note
4994 here of the number we used and the segment we chose
4995 to hold these headers, so that we can adjust the
4996 offset when we know the correct value. */
4997 phdr_adjust_num = iehdr->e_phnum;
4998 phdr_adjust_seg = map;
5002 /* Step Three: Loop over the sections again, this time assigning
5003 those that fit to the current segment and removing them from the
5004 sections array; but making sure not to leave large gaps. Once all
5005 possible sections have been assigned to the current segment it is
5006 added to the list of built segments and if sections still remain
5007 to be assigned, a new segment is constructed before repeating
5015 /* Fill the current segment with sections that fit. */
5016 for (j = 0; j < section_count; j++)
5018 section = sections[j];
5020 if (section == NULL)
5023 output_section = section->output_section;
5025 BFD_ASSERT (output_section != NULL);
5027 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5028 || IS_COREFILE_NOTE (segment, section))
5030 if (map->count == 0)
5032 /* If the first section in a segment does not start at
5033 the beginning of the segment, then something is
5035 if (output_section->lma !=
5037 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5038 + (map->includes_phdrs
5039 ? iehdr->e_phnum * iehdr->e_phentsize
5045 asection * prev_sec;
5047 prev_sec = map->sections[map->count - 1];
5049 /* If the gap between the end of the previous section
5050 and the start of this section is more than
5051 maxpagesize then we need to start a new segment. */
5052 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5054 < BFD_ALIGN (output_section->lma, maxpagesize))
5055 || ((prev_sec->lma + prev_sec->_raw_size)
5056 > output_section->lma))
5058 if (suggested_lma == 0)
5059 suggested_lma = output_section->lma;
5065 map->sections[map->count++] = output_section;
5068 section->segment_mark = TRUE;
5070 else if (suggested_lma == 0)
5071 suggested_lma = output_section->lma;
5074 BFD_ASSERT (map->count > 0);
5076 /* Add the current segment to the list of built segments. */
5077 *pointer_to_map = map;
5078 pointer_to_map = &map->next;
5080 if (isec < section_count)
5082 /* We still have not allocated all of the sections to
5083 segments. Create a new segment here, initialise it
5084 and carry on looping. */
5085 amt = sizeof (struct elf_segment_map);
5086 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5087 map = bfd_alloc (obfd, amt);
5094 /* Initialise the fields of the segment map. Set the physical
5095 physical address to the LMA of the first section that has
5096 not yet been assigned. */
5098 map->p_type = segment->p_type;
5099 map->p_flags = segment->p_flags;
5100 map->p_flags_valid = 1;
5101 map->p_paddr = suggested_lma;
5102 map->p_paddr_valid = 1;
5103 map->includes_filehdr = 0;
5104 map->includes_phdrs = 0;
5107 while (isec < section_count);
5112 /* The Solaris linker creates program headers in which all the
5113 p_paddr fields are zero. When we try to objcopy or strip such a
5114 file, we get confused. Check for this case, and if we find it
5115 reset the p_paddr_valid fields. */
5116 for (map = map_first; map != NULL; map = map->next)
5117 if (map->p_paddr != 0)
5120 for (map = map_first; map != NULL; map = map->next)
5121 map->p_paddr_valid = 0;
5123 elf_tdata (obfd)->segment_map = map_first;
5125 /* If we had to estimate the number of program headers that were
5126 going to be needed, then check our estimate now and adjust
5127 the offset if necessary. */
5128 if (phdr_adjust_seg != NULL)
5132 for (count = 0, map = map_first; map != NULL; map = map->next)
5135 if (count > phdr_adjust_num)
5136 phdr_adjust_seg->p_paddr
5137 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5141 /* Final Step: Sort the segments into ascending order of physical
5143 if (map_first != NULL)
5145 struct elf_segment_map *prev;
5148 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5150 /* Yes I know - its a bubble sort.... */
5151 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5153 /* Swap map and map->next. */
5154 prev->next = map->next;
5155 map->next = map->next->next;
5156 prev->next->next = map;
5167 #undef IS_CONTAINED_BY_VMA
5168 #undef IS_CONTAINED_BY_LMA
5169 #undef IS_COREFILE_NOTE
5170 #undef IS_SOLARIS_PT_INTERP
5171 #undef INCLUDE_SECTION_IN_SEGMENT
5172 #undef SEGMENT_AFTER_SEGMENT
5173 #undef SEGMENT_OVERLAPS
5177 /* Copy private section information. This copies over the entsize
5178 field, and sometimes the info field. */
5181 _bfd_elf_copy_private_section_data (bfd *ibfd,
5186 Elf_Internal_Shdr *ihdr, *ohdr;
5188 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5189 || obfd->xvec->flavour != bfd_target_elf_flavour)
5192 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5196 /* Only set up the segments if there are no more SEC_ALLOC
5197 sections. FIXME: This won't do the right thing if objcopy is
5198 used to remove the last SEC_ALLOC section, since objcopy
5199 won't call this routine in that case. */
5200 for (s = isec->next; s != NULL; s = s->next)
5201 if ((s->flags & SEC_ALLOC) != 0)
5205 if (! copy_private_bfd_data (ibfd, obfd))
5210 ihdr = &elf_section_data (isec)->this_hdr;
5211 ohdr = &elf_section_data (osec)->this_hdr;
5213 ohdr->sh_entsize = ihdr->sh_entsize;
5215 if (ihdr->sh_type == SHT_SYMTAB
5216 || ihdr->sh_type == SHT_DYNSYM
5217 || ihdr->sh_type == SHT_GNU_verneed
5218 || ihdr->sh_type == SHT_GNU_verdef)
5219 ohdr->sh_info = ihdr->sh_info;
5221 /* Set things up for objcopy. The output SHT_GROUP section will
5222 have its elf_next_in_group pointing back to the input group
5224 elf_next_in_group (osec) = elf_next_in_group (isec);
5225 elf_group_name (osec) = elf_group_name (isec);
5227 osec->use_rela_p = isec->use_rela_p;
5232 /* Copy private symbol information. If this symbol is in a section
5233 which we did not map into a BFD section, try to map the section
5234 index correctly. We use special macro definitions for the mapped
5235 section indices; these definitions are interpreted by the
5236 swap_out_syms function. */
5238 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5239 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5240 #define MAP_STRTAB (SHN_HIOS + 3)
5241 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5242 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5245 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
5250 elf_symbol_type *isym, *osym;
5252 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5253 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5256 isym = elf_symbol_from (ibfd, isymarg);
5257 osym = elf_symbol_from (obfd, osymarg);
5261 && bfd_is_abs_section (isym->symbol.section))
5265 shndx = isym->internal_elf_sym.st_shndx;
5266 if (shndx == elf_onesymtab (ibfd))
5267 shndx = MAP_ONESYMTAB;
5268 else if (shndx == elf_dynsymtab (ibfd))
5269 shndx = MAP_DYNSYMTAB;
5270 else if (shndx == elf_tdata (ibfd)->strtab_section)
5272 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5273 shndx = MAP_SHSTRTAB;
5274 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5275 shndx = MAP_SYM_SHNDX;
5276 osym->internal_elf_sym.st_shndx = shndx;
5282 /* Swap out the symbols. */
5285 swap_out_syms (bfd *abfd,
5286 struct bfd_strtab_hash **sttp,
5289 const struct elf_backend_data *bed;
5292 struct bfd_strtab_hash *stt;
5293 Elf_Internal_Shdr *symtab_hdr;
5294 Elf_Internal_Shdr *symtab_shndx_hdr;
5295 Elf_Internal_Shdr *symstrtab_hdr;
5296 char *outbound_syms;
5297 char *outbound_shndx;
5300 bfd_boolean name_local_sections;
5302 if (!elf_map_symbols (abfd))
5305 /* Dump out the symtabs. */
5306 stt = _bfd_elf_stringtab_init ();
5310 bed = get_elf_backend_data (abfd);
5311 symcount = bfd_get_symcount (abfd);
5312 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5313 symtab_hdr->sh_type = SHT_SYMTAB;
5314 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5315 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5316 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5317 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5319 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5320 symstrtab_hdr->sh_type = SHT_STRTAB;
5322 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5323 outbound_syms = bfd_alloc (abfd, amt);
5324 if (outbound_syms == NULL)
5326 _bfd_stringtab_free (stt);
5329 symtab_hdr->contents = outbound_syms;
5331 outbound_shndx = NULL;
5332 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5333 if (symtab_shndx_hdr->sh_name != 0)
5335 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5336 outbound_shndx = bfd_zalloc (abfd, amt);
5337 if (outbound_shndx == NULL)
5339 _bfd_stringtab_free (stt);
5343 symtab_shndx_hdr->contents = outbound_shndx;
5344 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5345 symtab_shndx_hdr->sh_size = amt;
5346 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5347 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5350 /* Now generate the data (for "contents"). */
5352 /* Fill in zeroth symbol and swap it out. */
5353 Elf_Internal_Sym sym;
5359 sym.st_shndx = SHN_UNDEF;
5360 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5361 outbound_syms += bed->s->sizeof_sym;
5362 if (outbound_shndx != NULL)
5363 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5367 = (bed->elf_backend_name_local_section_symbols
5368 && bed->elf_backend_name_local_section_symbols (abfd));
5370 syms = bfd_get_outsymbols (abfd);
5371 for (idx = 0; idx < symcount; idx++)
5373 Elf_Internal_Sym sym;
5374 bfd_vma value = syms[idx]->value;
5375 elf_symbol_type *type_ptr;
5376 flagword flags = syms[idx]->flags;
5379 if (!name_local_sections
5380 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5382 /* Local section symbols have no name. */
5387 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5390 if (sym.st_name == (unsigned long) -1)
5392 _bfd_stringtab_free (stt);
5397 type_ptr = elf_symbol_from (abfd, syms[idx]);
5399 if ((flags & BSF_SECTION_SYM) == 0
5400 && bfd_is_com_section (syms[idx]->section))
5402 /* ELF common symbols put the alignment into the `value' field,
5403 and the size into the `size' field. This is backwards from
5404 how BFD handles it, so reverse it here. */
5405 sym.st_size = value;
5406 if (type_ptr == NULL
5407 || type_ptr->internal_elf_sym.st_value == 0)
5408 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5410 sym.st_value = type_ptr->internal_elf_sym.st_value;
5411 sym.st_shndx = _bfd_elf_section_from_bfd_section
5412 (abfd, syms[idx]->section);
5416 asection *sec = syms[idx]->section;
5419 if (sec->output_section)
5421 value += sec->output_offset;
5422 sec = sec->output_section;
5425 /* Don't add in the section vma for relocatable output. */
5426 if (! relocatable_p)
5428 sym.st_value = value;
5429 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5431 if (bfd_is_abs_section (sec)
5433 && type_ptr->internal_elf_sym.st_shndx != 0)
5435 /* This symbol is in a real ELF section which we did
5436 not create as a BFD section. Undo the mapping done
5437 by copy_private_symbol_data. */
5438 shndx = type_ptr->internal_elf_sym.st_shndx;
5442 shndx = elf_onesymtab (abfd);
5445 shndx = elf_dynsymtab (abfd);
5448 shndx = elf_tdata (abfd)->strtab_section;
5451 shndx = elf_tdata (abfd)->shstrtab_section;
5454 shndx = elf_tdata (abfd)->symtab_shndx_section;
5462 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5468 /* Writing this would be a hell of a lot easier if
5469 we had some decent documentation on bfd, and
5470 knew what to expect of the library, and what to
5471 demand of applications. For example, it
5472 appears that `objcopy' might not set the
5473 section of a symbol to be a section that is
5474 actually in the output file. */
5475 sec2 = bfd_get_section_by_name (abfd, sec->name);
5478 _bfd_error_handler (_("\
5479 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5480 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5482 bfd_set_error (bfd_error_invalid_operation);
5483 _bfd_stringtab_free (stt);
5487 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5488 BFD_ASSERT (shndx != -1);
5492 sym.st_shndx = shndx;
5495 if ((flags & BSF_THREAD_LOCAL) != 0)
5497 else if ((flags & BSF_FUNCTION) != 0)
5499 else if ((flags & BSF_OBJECT) != 0)
5504 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5507 /* Processor-specific types. */
5508 if (type_ptr != NULL
5509 && bed->elf_backend_get_symbol_type)
5510 type = ((*bed->elf_backend_get_symbol_type)
5511 (&type_ptr->internal_elf_sym, type));
5513 if (flags & BSF_SECTION_SYM)
5515 if (flags & BSF_GLOBAL)
5516 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5518 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5520 else if (bfd_is_com_section (syms[idx]->section))
5521 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5522 else if (bfd_is_und_section (syms[idx]->section))
5523 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5527 else if (flags & BSF_FILE)
5528 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5531 int bind = STB_LOCAL;
5533 if (flags & BSF_LOCAL)
5535 else if (flags & BSF_WEAK)
5537 else if (flags & BSF_GLOBAL)
5540 sym.st_info = ELF_ST_INFO (bind, type);
5543 if (type_ptr != NULL)
5544 sym.st_other = type_ptr->internal_elf_sym.st_other;
5548 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5549 outbound_syms += bed->s->sizeof_sym;
5550 if (outbound_shndx != NULL)
5551 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5555 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5556 symstrtab_hdr->sh_type = SHT_STRTAB;
5558 symstrtab_hdr->sh_flags = 0;
5559 symstrtab_hdr->sh_addr = 0;
5560 symstrtab_hdr->sh_entsize = 0;
5561 symstrtab_hdr->sh_link = 0;
5562 symstrtab_hdr->sh_info = 0;
5563 symstrtab_hdr->sh_addralign = 1;
5568 /* Return the number of bytes required to hold the symtab vector.
5570 Note that we base it on the count plus 1, since we will null terminate
5571 the vector allocated based on this size. However, the ELF symbol table
5572 always has a dummy entry as symbol #0, so it ends up even. */
5575 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
5579 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5581 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5582 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5584 symtab_size -= sizeof (asymbol *);
5590 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
5594 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5596 if (elf_dynsymtab (abfd) == 0)
5598 bfd_set_error (bfd_error_invalid_operation);
5602 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5603 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5605 symtab_size -= sizeof (asymbol *);
5611 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
5614 return (asect->reloc_count + 1) * sizeof (arelent *);
5617 /* Canonicalize the relocs. */
5620 _bfd_elf_canonicalize_reloc (bfd *abfd,
5627 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5629 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5632 tblptr = section->relocation;
5633 for (i = 0; i < section->reloc_count; i++)
5634 *relptr++ = tblptr++;
5638 return section->reloc_count;
5642 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
5644 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5645 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
5648 bfd_get_symcount (abfd) = symcount;
5653 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
5654 asymbol **allocation)
5656 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5657 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
5660 bfd_get_dynamic_symcount (abfd) = symcount;
5664 /* Return the size required for the dynamic reloc entries. Any
5665 section that was actually installed in the BFD, and has type
5666 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5667 considered to be a dynamic reloc section. */
5670 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
5675 if (elf_dynsymtab (abfd) == 0)
5677 bfd_set_error (bfd_error_invalid_operation);
5681 ret = sizeof (arelent *);
5682 for (s = abfd->sections; s != NULL; s = s->next)
5683 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5684 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5685 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5686 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5687 * sizeof (arelent *));
5692 /* Canonicalize the dynamic relocation entries. Note that we return
5693 the dynamic relocations as a single block, although they are
5694 actually associated with particular sections; the interface, which
5695 was designed for SunOS style shared libraries, expects that there
5696 is only one set of dynamic relocs. Any section that was actually
5697 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5698 the dynamic symbol table, is considered to be a dynamic reloc
5702 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
5706 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5710 if (elf_dynsymtab (abfd) == 0)
5712 bfd_set_error (bfd_error_invalid_operation);
5716 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5718 for (s = abfd->sections; s != NULL; s = s->next)
5720 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5721 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5722 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5727 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5729 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5731 for (i = 0; i < count; i++)
5742 /* Read in the version information. */
5745 _bfd_elf_slurp_version_tables (bfd *abfd)
5747 bfd_byte *contents = NULL;
5750 if (elf_dynverdef (abfd) != 0)
5752 Elf_Internal_Shdr *hdr;
5753 Elf_External_Verdef *everdef;
5754 Elf_Internal_Verdef *iverdef;
5755 Elf_Internal_Verdef *iverdefarr;
5756 Elf_Internal_Verdef iverdefmem;
5758 unsigned int maxidx;
5760 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5762 contents = bfd_malloc (hdr->sh_size);
5763 if (contents == NULL)
5765 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5766 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5769 /* We know the number of entries in the section but not the maximum
5770 index. Therefore we have to run through all entries and find
5772 everdef = (Elf_External_Verdef *) contents;
5774 for (i = 0; i < hdr->sh_info; ++i)
5776 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5778 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5779 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5781 everdef = ((Elf_External_Verdef *)
5782 ((bfd_byte *) everdef + iverdefmem.vd_next));
5785 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5786 elf_tdata (abfd)->verdef = bfd_zalloc (abfd, amt);
5787 if (elf_tdata (abfd)->verdef == NULL)
5790 elf_tdata (abfd)->cverdefs = maxidx;
5792 everdef = (Elf_External_Verdef *) contents;
5793 iverdefarr = elf_tdata (abfd)->verdef;
5794 for (i = 0; i < hdr->sh_info; i++)
5796 Elf_External_Verdaux *everdaux;
5797 Elf_Internal_Verdaux *iverdaux;
5800 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5802 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5803 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5805 iverdef->vd_bfd = abfd;
5807 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5808 iverdef->vd_auxptr = bfd_alloc (abfd, amt);
5809 if (iverdef->vd_auxptr == NULL)
5812 everdaux = ((Elf_External_Verdaux *)
5813 ((bfd_byte *) everdef + iverdef->vd_aux));
5814 iverdaux = iverdef->vd_auxptr;
5815 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5817 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5819 iverdaux->vda_nodename =
5820 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5821 iverdaux->vda_name);
5822 if (iverdaux->vda_nodename == NULL)
5825 if (j + 1 < iverdef->vd_cnt)
5826 iverdaux->vda_nextptr = iverdaux + 1;
5828 iverdaux->vda_nextptr = NULL;
5830 everdaux = ((Elf_External_Verdaux *)
5831 ((bfd_byte *) everdaux + iverdaux->vda_next));
5834 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5836 if (i + 1 < hdr->sh_info)
5837 iverdef->vd_nextdef = iverdef + 1;
5839 iverdef->vd_nextdef = NULL;
5841 everdef = ((Elf_External_Verdef *)
5842 ((bfd_byte *) everdef + iverdef->vd_next));
5849 if (elf_dynverref (abfd) != 0)
5851 Elf_Internal_Shdr *hdr;
5852 Elf_External_Verneed *everneed;
5853 Elf_Internal_Verneed *iverneed;
5856 hdr = &elf_tdata (abfd)->dynverref_hdr;
5858 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5859 elf_tdata (abfd)->verref = bfd_zalloc (abfd, amt);
5860 if (elf_tdata (abfd)->verref == NULL)
5863 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5865 contents = bfd_malloc (hdr->sh_size);
5866 if (contents == NULL)
5868 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5869 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
5872 everneed = (Elf_External_Verneed *) contents;
5873 iverneed = elf_tdata (abfd)->verref;
5874 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5876 Elf_External_Vernaux *evernaux;
5877 Elf_Internal_Vernaux *ivernaux;
5880 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5882 iverneed->vn_bfd = abfd;
5884 iverneed->vn_filename =
5885 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5887 if (iverneed->vn_filename == NULL)
5890 amt = iverneed->vn_cnt;
5891 amt *= sizeof (Elf_Internal_Vernaux);
5892 iverneed->vn_auxptr = bfd_alloc (abfd, amt);
5894 evernaux = ((Elf_External_Vernaux *)
5895 ((bfd_byte *) everneed + iverneed->vn_aux));
5896 ivernaux = iverneed->vn_auxptr;
5897 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5899 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5901 ivernaux->vna_nodename =
5902 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5903 ivernaux->vna_name);
5904 if (ivernaux->vna_nodename == NULL)
5907 if (j + 1 < iverneed->vn_cnt)
5908 ivernaux->vna_nextptr = ivernaux + 1;
5910 ivernaux->vna_nextptr = NULL;
5912 evernaux = ((Elf_External_Vernaux *)
5913 ((bfd_byte *) evernaux + ivernaux->vna_next));
5916 if (i + 1 < hdr->sh_info)
5917 iverneed->vn_nextref = iverneed + 1;
5919 iverneed->vn_nextref = NULL;
5921 everneed = ((Elf_External_Verneed *)
5922 ((bfd_byte *) everneed + iverneed->vn_next));
5932 if (contents != NULL)
5938 _bfd_elf_make_empty_symbol (bfd *abfd)
5940 elf_symbol_type *newsym;
5941 bfd_size_type amt = sizeof (elf_symbol_type);
5943 newsym = bfd_zalloc (abfd, amt);
5948 newsym->symbol.the_bfd = abfd;
5949 return &newsym->symbol;
5954 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
5958 bfd_symbol_info (symbol, ret);
5961 /* Return whether a symbol name implies a local symbol. Most targets
5962 use this function for the is_local_label_name entry point, but some
5966 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
5969 /* Normal local symbols start with ``.L''. */
5970 if (name[0] == '.' && name[1] == 'L')
5973 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5974 DWARF debugging symbols starting with ``..''. */
5975 if (name[0] == '.' && name[1] == '.')
5978 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5979 emitting DWARF debugging output. I suspect this is actually a
5980 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5981 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5982 underscore to be emitted on some ELF targets). For ease of use,
5983 we treat such symbols as local. */
5984 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
5991 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
5992 asymbol *symbol ATTRIBUTE_UNUSED)
5999 _bfd_elf_set_arch_mach (bfd *abfd,
6000 enum bfd_architecture arch,
6001 unsigned long machine)
6003 /* If this isn't the right architecture for this backend, and this
6004 isn't the generic backend, fail. */
6005 if (arch != get_elf_backend_data (abfd)->arch
6006 && arch != bfd_arch_unknown
6007 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6010 return bfd_default_set_arch_mach (abfd, arch, machine);
6013 /* Find the function to a particular section and offset,
6014 for error reporting. */
6017 elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6021 const char **filename_ptr,
6022 const char **functionname_ptr)
6024 const char *filename;
6033 for (p = symbols; *p != NULL; p++)
6037 q = (elf_symbol_type *) *p;
6039 if (bfd_get_section (&q->symbol) != section)
6042 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6047 filename = bfd_asymbol_name (&q->symbol);
6051 if (q->symbol.section == section
6052 && q->symbol.value >= low_func
6053 && q->symbol.value <= offset)
6055 func = (asymbol *) q;
6056 low_func = q->symbol.value;
6066 *filename_ptr = filename;
6067 if (functionname_ptr)
6068 *functionname_ptr = bfd_asymbol_name (func);
6073 /* Find the nearest line to a particular section and offset,
6074 for error reporting. */
6077 _bfd_elf_find_nearest_line (bfd *abfd,
6081 const char **filename_ptr,
6082 const char **functionname_ptr,
6083 unsigned int *line_ptr)
6087 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6088 filename_ptr, functionname_ptr,
6091 if (!*functionname_ptr)
6092 elf_find_function (abfd, section, symbols, offset,
6093 *filename_ptr ? NULL : filename_ptr,
6099 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6100 filename_ptr, functionname_ptr,
6102 &elf_tdata (abfd)->dwarf2_find_line_info))
6104 if (!*functionname_ptr)
6105 elf_find_function (abfd, section, symbols, offset,
6106 *filename_ptr ? NULL : filename_ptr,
6112 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6113 &found, filename_ptr,
6114 functionname_ptr, line_ptr,
6115 &elf_tdata (abfd)->line_info))
6117 if (found && (*functionname_ptr || *line_ptr))
6120 if (symbols == NULL)
6123 if (! elf_find_function (abfd, section, symbols, offset,
6124 filename_ptr, functionname_ptr))
6132 _bfd_elf_sizeof_headers (bfd *abfd, bfd_boolean reloc)
6136 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6138 ret += get_program_header_size (abfd);
6143 _bfd_elf_set_section_contents (bfd *abfd,
6145 const void *location,
6147 bfd_size_type count)
6149 Elf_Internal_Shdr *hdr;
6152 if (! abfd->output_has_begun
6153 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
6156 hdr = &elf_section_data (section)->this_hdr;
6157 pos = hdr->sh_offset + offset;
6158 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6159 || bfd_bwrite (location, count, abfd) != count)
6166 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
6167 arelent *cache_ptr ATTRIBUTE_UNUSED,
6168 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
6173 /* Try to convert a non-ELF reloc into an ELF one. */
6176 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
6178 /* Check whether we really have an ELF howto. */
6180 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6182 bfd_reloc_code_real_type code;
6183 reloc_howto_type *howto;
6185 /* Alien reloc: Try to determine its type to replace it with an
6186 equivalent ELF reloc. */
6188 if (areloc->howto->pc_relative)
6190 switch (areloc->howto->bitsize)
6193 code = BFD_RELOC_8_PCREL;
6196 code = BFD_RELOC_12_PCREL;
6199 code = BFD_RELOC_16_PCREL;
6202 code = BFD_RELOC_24_PCREL;
6205 code = BFD_RELOC_32_PCREL;
6208 code = BFD_RELOC_64_PCREL;
6214 howto = bfd_reloc_type_lookup (abfd, code);
6216 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6218 if (howto->pcrel_offset)
6219 areloc->addend += areloc->address;
6221 areloc->addend -= areloc->address; /* addend is unsigned!! */
6226 switch (areloc->howto->bitsize)
6232 code = BFD_RELOC_14;
6235 code = BFD_RELOC_16;
6238 code = BFD_RELOC_26;
6241 code = BFD_RELOC_32;
6244 code = BFD_RELOC_64;
6250 howto = bfd_reloc_type_lookup (abfd, code);
6254 areloc->howto = howto;
6262 (*_bfd_error_handler)
6263 (_("%s: unsupported relocation type %s"),
6264 bfd_archive_filename (abfd), areloc->howto->name);
6265 bfd_set_error (bfd_error_bad_value);
6270 _bfd_elf_close_and_cleanup (bfd *abfd)
6272 if (bfd_get_format (abfd) == bfd_object)
6274 if (elf_shstrtab (abfd) != NULL)
6275 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6278 return _bfd_generic_close_and_cleanup (abfd);
6281 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6282 in the relocation's offset. Thus we cannot allow any sort of sanity
6283 range-checking to interfere. There is nothing else to do in processing
6286 bfd_reloc_status_type
6287 _bfd_elf_rel_vtable_reloc_fn
6288 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
6289 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
6290 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
6291 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
6293 return bfd_reloc_ok;
6296 /* Elf core file support. Much of this only works on native
6297 toolchains, since we rely on knowing the
6298 machine-dependent procfs structure in order to pick
6299 out details about the corefile. */
6301 #ifdef HAVE_SYS_PROCFS_H
6302 # include <sys/procfs.h>
6305 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6308 elfcore_make_pid (bfd *abfd)
6310 return ((elf_tdata (abfd)->core_lwpid << 16)
6311 + (elf_tdata (abfd)->core_pid));
6314 /* If there isn't a section called NAME, make one, using
6315 data from SECT. Note, this function will generate a
6316 reference to NAME, so you shouldn't deallocate or
6320 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
6324 if (bfd_get_section_by_name (abfd, name) != NULL)
6327 sect2 = bfd_make_section (abfd, name);
6331 sect2->_raw_size = sect->_raw_size;
6332 sect2->filepos = sect->filepos;
6333 sect2->flags = sect->flags;
6334 sect2->alignment_power = sect->alignment_power;
6338 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6339 actually creates up to two pseudosections:
6340 - For the single-threaded case, a section named NAME, unless
6341 such a section already exists.
6342 - For the multi-threaded case, a section named "NAME/PID", where
6343 PID is elfcore_make_pid (abfd).
6344 Both pseudosections have identical contents. */
6346 _bfd_elfcore_make_pseudosection (bfd *abfd,
6352 char *threaded_name;
6356 /* Build the section name. */
6358 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6359 len = strlen (buf) + 1;
6360 threaded_name = bfd_alloc (abfd, len);
6361 if (threaded_name == NULL)
6363 memcpy (threaded_name, buf, len);
6365 sect = bfd_make_section_anyway (abfd, threaded_name);
6368 sect->_raw_size = size;
6369 sect->filepos = filepos;
6370 sect->flags = SEC_HAS_CONTENTS;
6371 sect->alignment_power = 2;
6373 return elfcore_maybe_make_sect (abfd, name, sect);
6376 /* prstatus_t exists on:
6378 linux 2.[01] + glibc
6382 #if defined (HAVE_PRSTATUS_T)
6385 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
6390 if (note->descsz == sizeof (prstatus_t))
6394 raw_size = sizeof (prstat.pr_reg);
6395 offset = offsetof (prstatus_t, pr_reg);
6396 memcpy (&prstat, note->descdata, sizeof (prstat));
6398 /* Do not overwrite the core signal if it
6399 has already been set by another thread. */
6400 if (elf_tdata (abfd)->core_signal == 0)
6401 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6402 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6404 /* pr_who exists on:
6407 pr_who doesn't exist on:
6410 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6411 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6414 #if defined (HAVE_PRSTATUS32_T)
6415 else if (note->descsz == sizeof (prstatus32_t))
6417 /* 64-bit host, 32-bit corefile */
6418 prstatus32_t prstat;
6420 raw_size = sizeof (prstat.pr_reg);
6421 offset = offsetof (prstatus32_t, pr_reg);
6422 memcpy (&prstat, note->descdata, sizeof (prstat));
6424 /* Do not overwrite the core signal if it
6425 has already been set by another thread. */
6426 if (elf_tdata (abfd)->core_signal == 0)
6427 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6428 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6430 /* pr_who exists on:
6433 pr_who doesn't exist on:
6436 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6437 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6440 #endif /* HAVE_PRSTATUS32_T */
6443 /* Fail - we don't know how to handle any other
6444 note size (ie. data object type). */
6448 /* Make a ".reg/999" section and a ".reg" section. */
6449 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6450 raw_size, note->descpos + offset);
6452 #endif /* defined (HAVE_PRSTATUS_T) */
6454 /* Create a pseudosection containing the exact contents of NOTE. */
6456 elfcore_make_note_pseudosection (bfd *abfd,
6458 Elf_Internal_Note *note)
6460 return _bfd_elfcore_make_pseudosection (abfd, name,
6461 note->descsz, note->descpos);
6464 /* There isn't a consistent prfpregset_t across platforms,
6465 but it doesn't matter, because we don't have to pick this
6466 data structure apart. */
6469 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
6471 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6474 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6475 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6479 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
6481 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6484 #if defined (HAVE_PRPSINFO_T)
6485 typedef prpsinfo_t elfcore_psinfo_t;
6486 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6487 typedef prpsinfo32_t elfcore_psinfo32_t;
6491 #if defined (HAVE_PSINFO_T)
6492 typedef psinfo_t elfcore_psinfo_t;
6493 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6494 typedef psinfo32_t elfcore_psinfo32_t;
6498 /* return a malloc'ed copy of a string at START which is at
6499 most MAX bytes long, possibly without a terminating '\0'.
6500 the copy will always have a terminating '\0'. */
6503 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
6506 char *end = memchr (start, '\0', max);
6514 dups = bfd_alloc (abfd, len + 1);
6518 memcpy (dups, start, len);
6524 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6526 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
6528 if (note->descsz == sizeof (elfcore_psinfo_t))
6530 elfcore_psinfo_t psinfo;
6532 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6534 elf_tdata (abfd)->core_program
6535 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6536 sizeof (psinfo.pr_fname));
6538 elf_tdata (abfd)->core_command
6539 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6540 sizeof (psinfo.pr_psargs));
6542 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6543 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6545 /* 64-bit host, 32-bit corefile */
6546 elfcore_psinfo32_t psinfo;
6548 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6550 elf_tdata (abfd)->core_program
6551 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6552 sizeof (psinfo.pr_fname));
6554 elf_tdata (abfd)->core_command
6555 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6556 sizeof (psinfo.pr_psargs));
6562 /* Fail - we don't know how to handle any other
6563 note size (ie. data object type). */
6567 /* Note that for some reason, a spurious space is tacked
6568 onto the end of the args in some (at least one anyway)
6569 implementations, so strip it off if it exists. */
6572 char *command = elf_tdata (abfd)->core_command;
6573 int n = strlen (command);
6575 if (0 < n && command[n - 1] == ' ')
6576 command[n - 1] = '\0';
6581 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6583 #if defined (HAVE_PSTATUS_T)
6585 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
6587 if (note->descsz == sizeof (pstatus_t)
6588 #if defined (HAVE_PXSTATUS_T)
6589 || note->descsz == sizeof (pxstatus_t)
6595 memcpy (&pstat, note->descdata, sizeof (pstat));
6597 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6599 #if defined (HAVE_PSTATUS32_T)
6600 else if (note->descsz == sizeof (pstatus32_t))
6602 /* 64-bit host, 32-bit corefile */
6605 memcpy (&pstat, note->descdata, sizeof (pstat));
6607 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6610 /* Could grab some more details from the "representative"
6611 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6612 NT_LWPSTATUS note, presumably. */
6616 #endif /* defined (HAVE_PSTATUS_T) */
6618 #if defined (HAVE_LWPSTATUS_T)
6620 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
6622 lwpstatus_t lwpstat;
6628 if (note->descsz != sizeof (lwpstat)
6629 #if defined (HAVE_LWPXSTATUS_T)
6630 && note->descsz != sizeof (lwpxstatus_t)
6635 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6637 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6638 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6640 /* Make a ".reg/999" section. */
6642 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6643 len = strlen (buf) + 1;
6644 name = bfd_alloc (abfd, len);
6647 memcpy (name, buf, len);
6649 sect = bfd_make_section_anyway (abfd, name);
6653 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6654 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6655 sect->filepos = note->descpos
6656 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6659 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6660 sect->_raw_size = sizeof (lwpstat.pr_reg);
6661 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6664 sect->flags = SEC_HAS_CONTENTS;
6665 sect->alignment_power = 2;
6667 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6670 /* Make a ".reg2/999" section */
6672 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6673 len = strlen (buf) + 1;
6674 name = bfd_alloc (abfd, len);
6677 memcpy (name, buf, len);
6679 sect = bfd_make_section_anyway (abfd, name);
6683 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6684 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6685 sect->filepos = note->descpos
6686 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6689 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6690 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6691 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6694 sect->flags = SEC_HAS_CONTENTS;
6695 sect->alignment_power = 2;
6697 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6699 #endif /* defined (HAVE_LWPSTATUS_T) */
6701 #if defined (HAVE_WIN32_PSTATUS_T)
6703 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
6709 win32_pstatus_t pstatus;
6711 if (note->descsz < sizeof (pstatus))
6714 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6716 switch (pstatus.data_type)
6718 case NOTE_INFO_PROCESS:
6719 /* FIXME: need to add ->core_command. */
6720 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6721 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6724 case NOTE_INFO_THREAD:
6725 /* Make a ".reg/999" section. */
6726 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6728 len = strlen (buf) + 1;
6729 name = bfd_alloc (abfd, len);
6733 memcpy (name, buf, len);
6735 sect = bfd_make_section_anyway (abfd, name);
6739 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6740 sect->filepos = (note->descpos
6741 + offsetof (struct win32_pstatus,
6742 data.thread_info.thread_context));
6743 sect->flags = SEC_HAS_CONTENTS;
6744 sect->alignment_power = 2;
6746 if (pstatus.data.thread_info.is_active_thread)
6747 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6751 case NOTE_INFO_MODULE:
6752 /* Make a ".module/xxxxxxxx" section. */
6753 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6755 len = strlen (buf) + 1;
6756 name = bfd_alloc (abfd, len);
6760 memcpy (name, buf, len);
6762 sect = bfd_make_section_anyway (abfd, name);
6767 sect->_raw_size = note->descsz;
6768 sect->filepos = note->descpos;
6769 sect->flags = SEC_HAS_CONTENTS;
6770 sect->alignment_power = 2;
6779 #endif /* HAVE_WIN32_PSTATUS_T */
6782 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
6784 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6792 if (bed->elf_backend_grok_prstatus)
6793 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6795 #if defined (HAVE_PRSTATUS_T)
6796 return elfcore_grok_prstatus (abfd, note);
6801 #if defined (HAVE_PSTATUS_T)
6803 return elfcore_grok_pstatus (abfd, note);
6806 #if defined (HAVE_LWPSTATUS_T)
6808 return elfcore_grok_lwpstatus (abfd, note);
6811 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6812 return elfcore_grok_prfpreg (abfd, note);
6814 #if defined (HAVE_WIN32_PSTATUS_T)
6815 case NT_WIN32PSTATUS:
6816 return elfcore_grok_win32pstatus (abfd, note);
6819 case NT_PRXFPREG: /* Linux SSE extension */
6820 if (note->namesz == 6
6821 && strcmp (note->namedata, "LINUX") == 0)
6822 return elfcore_grok_prxfpreg (abfd, note);
6828 if (bed->elf_backend_grok_psinfo)
6829 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6831 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6832 return elfcore_grok_psinfo (abfd, note);
6839 asection *sect = bfd_make_section_anyway (abfd, ".auxv");
6843 sect->_raw_size = note->descsz;
6844 sect->filepos = note->descpos;
6845 sect->flags = SEC_HAS_CONTENTS;
6846 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
6854 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
6858 cp = strchr (note->namedata, '@');
6861 *lwpidp = atoi(cp + 1);
6868 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
6871 /* Signal number at offset 0x08. */
6872 elf_tdata (abfd)->core_signal
6873 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6875 /* Process ID at offset 0x50. */
6876 elf_tdata (abfd)->core_pid
6877 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6879 /* Command name at 0x7c (max 32 bytes, including nul). */
6880 elf_tdata (abfd)->core_command
6881 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6883 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
6888 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
6892 if (elfcore_netbsd_get_lwpid (note, &lwp))
6893 elf_tdata (abfd)->core_lwpid = lwp;
6895 if (note->type == NT_NETBSDCORE_PROCINFO)
6897 /* NetBSD-specific core "procinfo". Note that we expect to
6898 find this note before any of the others, which is fine,
6899 since the kernel writes this note out first when it
6900 creates a core file. */
6902 return elfcore_grok_netbsd_procinfo (abfd, note);
6905 /* As of Jan 2002 there are no other machine-independent notes
6906 defined for NetBSD core files. If the note type is less
6907 than the start of the machine-dependent note types, we don't
6910 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6914 switch (bfd_get_arch (abfd))
6916 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6917 PT_GETFPREGS == mach+2. */
6919 case bfd_arch_alpha:
6920 case bfd_arch_sparc:
6923 case NT_NETBSDCORE_FIRSTMACH+0:
6924 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6926 case NT_NETBSDCORE_FIRSTMACH+2:
6927 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6933 /* On all other arch's, PT_GETREGS == mach+1 and
6934 PT_GETFPREGS == mach+3. */
6939 case NT_NETBSDCORE_FIRSTMACH+1:
6940 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6942 case NT_NETBSDCORE_FIRSTMACH+3:
6943 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6953 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, pid_t *tid)
6955 void *ddata = note->descdata;
6962 /* nto_procfs_status 'pid' field is at offset 0. */
6963 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
6965 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
6966 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
6968 /* nto_procfs_status 'flags' field is at offset 8. */
6969 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
6971 /* nto_procfs_status 'what' field is at offset 14. */
6972 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
6974 elf_tdata (abfd)->core_signal = sig;
6975 elf_tdata (abfd)->core_lwpid = *tid;
6978 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
6979 do not come from signals so we make sure we set the current
6980 thread just in case. */
6981 if (flags & 0x00000080)
6982 elf_tdata (abfd)->core_lwpid = *tid;
6984 /* Make a ".qnx_core_status/%d" section. */
6985 sprintf (buf, ".qnx_core_status/%d", *tid);
6987 name = bfd_alloc (abfd, strlen (buf) + 1);
6992 sect = bfd_make_section_anyway (abfd, name);
6996 sect->_raw_size = note->descsz;
6997 sect->filepos = note->descpos;
6998 sect->flags = SEC_HAS_CONTENTS;
6999 sect->alignment_power = 2;
7001 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7005 elfcore_grok_nto_gregs (bfd *abfd, Elf_Internal_Note *note, pid_t tid)
7011 /* Make a ".reg/%d" section. */
7012 sprintf (buf, ".reg/%d", tid);
7014 name = bfd_alloc (abfd, strlen (buf) + 1);
7019 sect = bfd_make_section_anyway (abfd, name);
7023 sect->_raw_size = note->descsz;
7024 sect->filepos = note->descpos;
7025 sect->flags = SEC_HAS_CONTENTS;
7026 sect->alignment_power = 2;
7028 /* This is the current thread. */
7029 if (elf_tdata (abfd)->core_lwpid == tid)
7030 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7035 #define BFD_QNT_CORE_INFO 7
7036 #define BFD_QNT_CORE_STATUS 8
7037 #define BFD_QNT_CORE_GREG 9
7038 #define BFD_QNT_CORE_FPREG 10
7041 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
7043 /* Every GREG section has a STATUS section before it. Store the
7044 tid from the previous call to pass down to the next gregs
7046 static pid_t tid = 1;
7050 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7051 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7052 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7053 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7054 default: return TRUE;
7058 /* Function: elfcore_write_note
7065 size of data for note
7068 End of buffer containing note. */
7071 elfcore_write_note (bfd *abfd,
7079 Elf_External_Note *xnp;
7089 const struct elf_backend_data *bed;
7091 namesz = strlen (name) + 1;
7092 bed = get_elf_backend_data (abfd);
7093 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7096 newspace = 12 + namesz + pad + size;
7098 p = realloc (buf, *bufsiz + newspace);
7100 *bufsiz += newspace;
7101 xnp = (Elf_External_Note *) dest;
7102 H_PUT_32 (abfd, namesz, xnp->namesz);
7103 H_PUT_32 (abfd, size, xnp->descsz);
7104 H_PUT_32 (abfd, type, xnp->type);
7108 memcpy (dest, name, namesz);
7116 memcpy (dest, input, size);
7120 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7122 elfcore_write_prpsinfo (bfd *abfd,
7129 char *note_name = "CORE";
7131 #if defined (HAVE_PSINFO_T)
7133 note_type = NT_PSINFO;
7136 note_type = NT_PRPSINFO;
7139 memset (&data, 0, sizeof (data));
7140 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7141 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7142 return elfcore_write_note (abfd, buf, bufsiz,
7143 note_name, note_type, &data, sizeof (data));
7145 #endif /* PSINFO_T or PRPSINFO_T */
7147 #if defined (HAVE_PRSTATUS_T)
7149 elfcore_write_prstatus (bfd *abfd,
7157 char *note_name = "CORE";
7159 memset (&prstat, 0, sizeof (prstat));
7160 prstat.pr_pid = pid;
7161 prstat.pr_cursig = cursig;
7162 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7163 return elfcore_write_note (abfd, buf, bufsiz,
7164 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7166 #endif /* HAVE_PRSTATUS_T */
7168 #if defined (HAVE_LWPSTATUS_T)
7170 elfcore_write_lwpstatus (bfd *abfd,
7177 lwpstatus_t lwpstat;
7178 char *note_name = "CORE";
7180 memset (&lwpstat, 0, sizeof (lwpstat));
7181 lwpstat.pr_lwpid = pid >> 16;
7182 lwpstat.pr_cursig = cursig;
7183 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7184 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7185 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7187 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7188 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7190 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7191 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7194 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7195 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7197 #endif /* HAVE_LWPSTATUS_T */
7199 #if defined (HAVE_PSTATUS_T)
7201 elfcore_write_pstatus (bfd *abfd,
7209 char *note_name = "CORE";
7211 memset (&pstat, 0, sizeof (pstat));
7212 pstat.pr_pid = pid & 0xffff;
7213 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7214 NT_PSTATUS, &pstat, sizeof (pstat));
7217 #endif /* HAVE_PSTATUS_T */
7220 elfcore_write_prfpreg (bfd *abfd,
7226 char *note_name = "CORE";
7227 return elfcore_write_note (abfd, buf, bufsiz,
7228 note_name, NT_FPREGSET, fpregs, size);
7232 elfcore_write_prxfpreg (bfd *abfd,
7235 const void *xfpregs,
7238 char *note_name = "LINUX";
7239 return elfcore_write_note (abfd, buf, bufsiz,
7240 note_name, NT_PRXFPREG, xfpregs, size);
7244 elfcore_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
7252 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7255 buf = bfd_malloc (size);
7259 if (bfd_bread (buf, size, abfd) != size)
7267 while (p < buf + size)
7269 /* FIXME: bad alignment assumption. */
7270 Elf_External_Note *xnp = (Elf_External_Note *) p;
7271 Elf_Internal_Note in;
7273 in.type = H_GET_32 (abfd, xnp->type);
7275 in.namesz = H_GET_32 (abfd, xnp->namesz);
7276 in.namedata = xnp->name;
7278 in.descsz = H_GET_32 (abfd, xnp->descsz);
7279 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7280 in.descpos = offset + (in.descdata - buf);
7282 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7284 if (! elfcore_grok_netbsd_note (abfd, &in))
7287 else if (strncmp (in.namedata, "QNX", 3) == 0)
7289 if (! elfcore_grok_nto_note (abfd, &in))
7294 if (! elfcore_grok_note (abfd, &in))
7298 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7305 /* Providing external access to the ELF program header table. */
7307 /* Return an upper bound on the number of bytes required to store a
7308 copy of ABFD's program header table entries. Return -1 if an error
7309 occurs; bfd_get_error will return an appropriate code. */
7312 bfd_get_elf_phdr_upper_bound (bfd *abfd)
7314 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7316 bfd_set_error (bfd_error_wrong_format);
7320 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7323 /* Copy ABFD's program header table entries to *PHDRS. The entries
7324 will be stored as an array of Elf_Internal_Phdr structures, as
7325 defined in include/elf/internal.h. To find out how large the
7326 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7328 Return the number of program header table entries read, or -1 if an
7329 error occurs; bfd_get_error will return an appropriate code. */
7332 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
7336 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7338 bfd_set_error (bfd_error_wrong_format);
7342 num_phdrs = elf_elfheader (abfd)->e_phnum;
7343 memcpy (phdrs, elf_tdata (abfd)->phdr,
7344 num_phdrs * sizeof (Elf_Internal_Phdr));
7350 _bfd_elf_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
7353 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7355 i_ehdrp = elf_elfheader (abfd);
7356 if (i_ehdrp == NULL)
7357 sprintf_vma (buf, value);
7360 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7362 #if BFD_HOST_64BIT_LONG
7363 sprintf (buf, "%016lx", value);
7365 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7366 _bfd_int64_low (value));
7370 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7373 sprintf_vma (buf, value);
7378 _bfd_elf_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
7381 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7383 i_ehdrp = elf_elfheader (abfd);
7384 if (i_ehdrp == NULL)
7385 fprintf_vma ((FILE *) stream, value);
7388 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7390 #if BFD_HOST_64BIT_LONG
7391 fprintf ((FILE *) stream, "%016lx", value);
7393 fprintf ((FILE *) stream, "%08lx%08lx",
7394 _bfd_int64_high (value), _bfd_int64_low (value));
7398 fprintf ((FILE *) stream, "%08lx",
7399 (unsigned long) (value & 0xffffffff));
7402 fprintf_vma ((FILE *) stream, value);
7406 enum elf_reloc_type_class
7407 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
7409 return reloc_class_normal;
7412 /* For RELA architectures, return the relocation value for a
7413 relocation against a local symbol. */
7416 _bfd_elf_rela_local_sym (bfd *abfd,
7417 Elf_Internal_Sym *sym,
7419 Elf_Internal_Rela *rel)
7421 asection *sec = *psec;
7424 relocation = (sec->output_section->vma
7425 + sec->output_offset
7427 if ((sec->flags & SEC_MERGE)
7428 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7429 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7432 _bfd_merged_section_offset (abfd, psec,
7433 elf_section_data (sec)->sec_info,
7434 sym->st_value + rel->r_addend,
7437 rel->r_addend -= relocation;
7438 rel->r_addend += sec->output_section->vma + sec->output_offset;
7444 _bfd_elf_rel_local_sym (bfd *abfd,
7445 Elf_Internal_Sym *sym,
7449 asection *sec = *psec;
7451 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7452 return sym->st_value + addend;
7454 return _bfd_merged_section_offset (abfd, psec,
7455 elf_section_data (sec)->sec_info,
7456 sym->st_value + addend, 0);
7460 _bfd_elf_section_offset (bfd *abfd,
7461 struct bfd_link_info *info,
7465 struct bfd_elf_section_data *sec_data;
7467 sec_data = elf_section_data (sec);
7468 switch (sec->sec_info_type)
7470 case ELF_INFO_TYPE_STABS:
7471 return _bfd_stab_section_offset (abfd,
7472 &elf_hash_table (info)->merge_info,
7473 sec, &sec_data->sec_info, offset);
7474 case ELF_INFO_TYPE_EH_FRAME:
7475 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7481 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7482 reconstruct an ELF file by reading the segments out of remote memory
7483 based on the ELF file header at EHDR_VMA and the ELF program headers it
7484 points to. If not null, *LOADBASEP is filled in with the difference
7485 between the VMAs from which the segments were read, and the VMAs the
7486 file headers (and hence BFD's idea of each section's VMA) put them at.
7488 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7489 remote memory at target address VMA into the local buffer at MYADDR; it
7490 should return zero on success or an `errno' code on failure. TEMPL must
7491 be a BFD for an ELF target with the word size and byte order found in
7492 the remote memory. */
7495 bfd_elf_bfd_from_remote_memory
7499 int (*target_read_memory) (bfd_vma, char *, int))
7501 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7502 (templ, ehdr_vma, loadbasep, target_read_memory);