1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet. */
33 /* For sparc64-cross-sparc32. */
41 #include "libiberty.h"
43 static INLINE struct elf_segment_map *make_mapping
44 PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
45 static boolean map_sections_to_segments PARAMS ((bfd *));
46 static int elf_sort_sections PARAMS ((const PTR, const PTR));
47 static boolean assign_file_positions_for_segments PARAMS ((bfd *));
48 static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
49 static boolean prep_headers PARAMS ((bfd *));
50 static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int));
51 static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
52 static char *elf_read PARAMS ((bfd *, file_ptr, bfd_size_type));
53 static const char *group_signature PARAMS ((bfd *, Elf_Internal_Shdr *));
54 static boolean setup_group PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
55 static void merge_sections_remove_hook PARAMS ((bfd *, asection *));
56 static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
57 static boolean assign_section_numbers PARAMS ((bfd *));
58 static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
59 static boolean elf_map_symbols PARAMS ((bfd *));
60 static bfd_size_type get_program_header_size PARAMS ((bfd *));
61 static boolean elfcore_read_notes PARAMS ((bfd *, file_ptr, bfd_size_type));
62 static boolean elf_find_function PARAMS ((bfd *, asection *, asymbol **,
63 bfd_vma, const char **,
65 static int elfcore_make_pid PARAMS ((bfd *));
66 static boolean elfcore_maybe_make_sect PARAMS ((bfd *, char *, asection *));
67 static boolean elfcore_make_note_pseudosection PARAMS ((bfd *, char *,
68 Elf_Internal_Note *));
69 static boolean elfcore_grok_prfpreg PARAMS ((bfd *, Elf_Internal_Note *));
70 static boolean elfcore_grok_prxfpreg PARAMS ((bfd *, Elf_Internal_Note *));
71 static boolean elfcore_grok_note PARAMS ((bfd *, Elf_Internal_Note *));
73 static boolean elfcore_netbsd_get_lwpid PARAMS ((Elf_Internal_Note *, int *));
74 static boolean elfcore_grok_netbsd_procinfo PARAMS ((bfd *,
75 Elf_Internal_Note *));
76 static boolean elfcore_grok_netbsd_note PARAMS ((bfd *, Elf_Internal_Note *));
78 /* Swap version information in and out. The version information is
79 currently size independent. If that ever changes, this code will
80 need to move into elfcode.h. */
82 /* Swap in a Verdef structure. */
85 _bfd_elf_swap_verdef_in (abfd, src, dst)
87 const Elf_External_Verdef *src;
88 Elf_Internal_Verdef *dst;
90 dst->vd_version = H_GET_16 (abfd, src->vd_version);
91 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
92 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
93 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
94 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
95 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
96 dst->vd_next = H_GET_32 (abfd, src->vd_next);
99 /* Swap out a Verdef structure. */
102 _bfd_elf_swap_verdef_out (abfd, src, dst)
104 const Elf_Internal_Verdef *src;
105 Elf_External_Verdef *dst;
107 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
108 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
109 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
110 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
111 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
112 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
113 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
116 /* Swap in a Verdaux structure. */
119 _bfd_elf_swap_verdaux_in (abfd, src, dst)
121 const Elf_External_Verdaux *src;
122 Elf_Internal_Verdaux *dst;
124 dst->vda_name = H_GET_32 (abfd, src->vda_name);
125 dst->vda_next = H_GET_32 (abfd, src->vda_next);
128 /* Swap out a Verdaux structure. */
131 _bfd_elf_swap_verdaux_out (abfd, src, dst)
133 const Elf_Internal_Verdaux *src;
134 Elf_External_Verdaux *dst;
136 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
137 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
140 /* Swap in a Verneed structure. */
143 _bfd_elf_swap_verneed_in (abfd, src, dst)
145 const Elf_External_Verneed *src;
146 Elf_Internal_Verneed *dst;
148 dst->vn_version = H_GET_16 (abfd, src->vn_version);
149 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
150 dst->vn_file = H_GET_32 (abfd, src->vn_file);
151 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
152 dst->vn_next = H_GET_32 (abfd, src->vn_next);
155 /* Swap out a Verneed structure. */
158 _bfd_elf_swap_verneed_out (abfd, src, dst)
160 const Elf_Internal_Verneed *src;
161 Elf_External_Verneed *dst;
163 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
164 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
165 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
166 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
167 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
170 /* Swap in a Vernaux structure. */
173 _bfd_elf_swap_vernaux_in (abfd, src, dst)
175 const Elf_External_Vernaux *src;
176 Elf_Internal_Vernaux *dst;
178 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
179 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
180 dst->vna_other = H_GET_16 (abfd, src->vna_other);
181 dst->vna_name = H_GET_32 (abfd, src->vna_name);
182 dst->vna_next = H_GET_32 (abfd, src->vna_next);
185 /* Swap out a Vernaux structure. */
188 _bfd_elf_swap_vernaux_out (abfd, src, dst)
190 const Elf_Internal_Vernaux *src;
191 Elf_External_Vernaux *dst;
193 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
194 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
195 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
196 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
197 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
200 /* Swap in a Versym structure. */
203 _bfd_elf_swap_versym_in (abfd, src, dst)
205 const Elf_External_Versym *src;
206 Elf_Internal_Versym *dst;
208 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
211 /* Swap out a Versym structure. */
214 _bfd_elf_swap_versym_out (abfd, src, dst)
216 const Elf_Internal_Versym *src;
217 Elf_External_Versym *dst;
219 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
222 /* Standard ELF hash function. Do not change this function; you will
223 cause invalid hash tables to be generated. */
226 bfd_elf_hash (namearg)
229 const unsigned char *name = (const unsigned char *) namearg;
234 while ((ch = *name++) != '\0')
237 if ((g = (h & 0xf0000000)) != 0)
240 /* The ELF ABI says `h &= ~g', but this is equivalent in
241 this case and on some machines one insn instead of two. */
248 /* Read a specified number of bytes at a specified offset in an ELF
249 file, into a newly allocated buffer, and return a pointer to the
253 elf_read (abfd, offset, size)
260 if ((buf = bfd_alloc (abfd, size)) == NULL)
262 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
264 if (bfd_bread ((PTR) buf, size, abfd) != size)
266 if (bfd_get_error () != bfd_error_system_call)
267 bfd_set_error (bfd_error_file_truncated);
274 bfd_elf_mkobject (abfd)
277 /* This just does initialization. */
278 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
279 bfd_size_type amt = sizeof (struct elf_obj_tdata);
280 elf_tdata (abfd) = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
281 if (elf_tdata (abfd) == 0)
283 /* Since everything is done at close time, do we need any
290 bfd_elf_mkcorefile (abfd)
293 /* I think this can be done just like an object file. */
294 return bfd_elf_mkobject (abfd);
298 bfd_elf_get_str_section (abfd, shindex)
300 unsigned int shindex;
302 Elf_Internal_Shdr **i_shdrp;
303 char *shstrtab = NULL;
305 bfd_size_type shstrtabsize;
307 i_shdrp = elf_elfsections (abfd);
308 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
311 shstrtab = (char *) i_shdrp[shindex]->contents;
312 if (shstrtab == NULL)
314 /* No cached one, attempt to read, and cache what we read. */
315 offset = i_shdrp[shindex]->sh_offset;
316 shstrtabsize = i_shdrp[shindex]->sh_size;
317 shstrtab = elf_read (abfd, offset, shstrtabsize);
318 i_shdrp[shindex]->contents = (PTR) shstrtab;
324 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
326 unsigned int shindex;
327 unsigned int strindex;
329 Elf_Internal_Shdr *hdr;
334 hdr = elf_elfsections (abfd)[shindex];
336 if (hdr->contents == NULL
337 && bfd_elf_get_str_section (abfd, shindex) == NULL)
340 if (strindex >= hdr->sh_size)
342 (*_bfd_error_handler)
343 (_("%s: invalid string offset %u >= %lu for section `%s'"),
344 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
345 ((shindex == elf_elfheader(abfd)->e_shstrndx
346 && strindex == hdr->sh_name)
348 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
352 return ((char *) hdr->contents) + strindex;
355 /* Read and convert symbols to internal format.
356 SYMCOUNT specifies the number of symbols to read, starting from
357 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
358 are non-NULL, they are used to store the internal symbols, external
359 symbols, and symbol section index extensions, respectively. */
362 bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, symoffset,
363 intsym_buf, extsym_buf, extshndx_buf)
365 Elf_Internal_Shdr *symtab_hdr;
368 Elf_Internal_Sym *intsym_buf;
370 Elf_External_Sym_Shndx *extshndx_buf;
372 Elf_Internal_Shdr *shndx_hdr;
375 Elf_External_Sym_Shndx *alloc_extshndx;
376 Elf_External_Sym_Shndx *shndx;
377 Elf_Internal_Sym *isym;
378 Elf_Internal_Sym *isymend;
379 struct elf_backend_data *bed;
387 /* Normal syms might have section extension entries. */
389 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
390 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
392 /* Read the symbols. */
394 alloc_extshndx = NULL;
395 bed = get_elf_backend_data (ibfd);
396 extsym_size = bed->s->sizeof_sym;
397 amt = symcount * extsym_size;
398 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
399 if (extsym_buf == NULL)
401 alloc_ext = bfd_malloc (amt);
402 extsym_buf = alloc_ext;
404 if (extsym_buf == NULL
405 || bfd_seek (ibfd, pos, SEEK_SET) != 0
406 || bfd_bread (extsym_buf, amt, ibfd) != amt)
412 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
416 amt = symcount * sizeof (Elf_External_Sym_Shndx);
417 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
418 if (extshndx_buf == NULL)
420 alloc_extshndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
421 extshndx_buf = alloc_extshndx;
423 if (extshndx_buf == NULL
424 || bfd_seek (ibfd, pos, SEEK_SET) != 0
425 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
432 if (intsym_buf == NULL)
434 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
435 intsym_buf = (Elf_Internal_Sym *) bfd_malloc (amt);
436 if (intsym_buf == NULL)
440 /* Convert the symbols to internal form. */
441 isymend = intsym_buf + symcount;
442 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
444 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
445 (*bed->s->swap_symbol_in) (ibfd, esym, (const PTR) shndx, isym);
448 if (alloc_ext != NULL)
450 if (alloc_extshndx != NULL)
451 free (alloc_extshndx);
456 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
457 sections. The first element is the flags, the rest are section
460 typedef union elf_internal_group {
461 Elf_Internal_Shdr *shdr;
463 } Elf_Internal_Group;
465 /* Return the name of the group signature symbol. Why isn't the
466 signature just a string? */
469 group_signature (abfd, ghdr)
471 Elf_Internal_Shdr *ghdr;
473 Elf_Internal_Shdr *hdr;
474 unsigned char esym[sizeof (Elf64_External_Sym)];
475 Elf_External_Sym_Shndx eshndx;
476 Elf_Internal_Sym isym;
478 unsigned int shindex;
480 /* First we need to ensure the symbol table is available. */
481 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
484 /* Go read the symbol. */
485 hdr = &elf_tdata (abfd)->symtab_hdr;
486 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
487 &isym, esym, &eshndx) == NULL)
490 /* Look up the symbol name. */
491 iname = isym.st_name;
492 shindex = hdr->sh_link;
493 if (iname == 0 && ELF_ST_TYPE (isym.st_info) == STT_SECTION)
495 iname = elf_elfsections (abfd)[isym.st_shndx]->sh_name;
496 shindex = elf_elfheader (abfd)->e_shstrndx;
499 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
502 /* Set next_in_group list pointer, and group name for NEWSECT. */
505 setup_group (abfd, hdr, newsect)
507 Elf_Internal_Shdr *hdr;
510 unsigned int num_group = elf_tdata (abfd)->num_group;
512 /* If num_group is zero, read in all SHT_GROUP sections. The count
513 is set to -1 if there are no SHT_GROUP sections. */
516 unsigned int i, shnum;
518 /* First count the number of groups. If we have a SHT_GROUP
519 section with just a flag word (ie. sh_size is 4), ignore it. */
520 shnum = elf_numsections (abfd);
522 for (i = 0; i < shnum; i++)
524 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
525 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
530 num_group = (unsigned) -1;
531 elf_tdata (abfd)->num_group = num_group;
535 /* We keep a list of elf section headers for group sections,
536 so we can find them quickly. */
537 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
538 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
539 if (elf_tdata (abfd)->group_sect_ptr == NULL)
543 for (i = 0; i < shnum; i++)
545 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
546 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
549 Elf_Internal_Group *dest;
551 /* Add to list of sections. */
552 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
555 /* Read the raw contents. */
556 BFD_ASSERT (sizeof (*dest) >= 4);
557 amt = shdr->sh_size * sizeof (*dest) / 4;
558 shdr->contents = bfd_alloc (abfd, amt);
559 if (shdr->contents == NULL
560 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
561 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
565 /* Translate raw contents, a flag word followed by an
566 array of elf section indices all in target byte order,
567 to the flag word followed by an array of elf section
569 src = shdr->contents + shdr->sh_size;
570 dest = (Elf_Internal_Group *) (shdr->contents + amt);
577 idx = H_GET_32 (abfd, src);
578 if (src == shdr->contents)
581 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
582 shdr->bfd_section->flags
583 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
588 ((*_bfd_error_handler)
589 (_("%s: invalid SHT_GROUP entry"),
590 bfd_archive_filename (abfd)));
593 dest->shdr = elf_elfsections (abfd)[idx];
600 if (num_group != (unsigned) -1)
604 for (i = 0; i < num_group; i++)
606 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
607 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
608 unsigned int n_elt = shdr->sh_size / 4;
610 /* Look through this group's sections to see if current
611 section is a member. */
613 if ((++idx)->shdr == hdr)
617 /* We are a member of this group. Go looking through
618 other members to see if any others are linked via
620 idx = (Elf_Internal_Group *) shdr->contents;
621 n_elt = shdr->sh_size / 4;
623 if ((s = (++idx)->shdr->bfd_section) != NULL
624 && elf_next_in_group (s) != NULL)
628 /* Snarf the group name from other member, and
629 insert current section in circular list. */
630 elf_group_name (newsect) = elf_group_name (s);
631 elf_next_in_group (newsect) = elf_next_in_group (s);
632 elf_next_in_group (s) = newsect;
638 gname = group_signature (abfd, shdr);
641 elf_group_name (newsect) = gname;
643 /* Start a circular list with one element. */
644 elf_next_in_group (newsect) = newsect;
647 /* If the group section has been created, point to the
649 if (shdr->bfd_section != NULL)
650 elf_next_in_group (shdr->bfd_section) = newsect;
658 if (elf_group_name (newsect) == NULL)
660 (*_bfd_error_handler) (_("%s: no group info for section %s"),
661 bfd_archive_filename (abfd), newsect->name);
667 bfd_elf_discard_group (abfd, group)
668 bfd *abfd ATTRIBUTE_UNUSED;
671 asection *first = elf_next_in_group (group);
676 s->output_section = bfd_abs_section_ptr;
677 s = elf_next_in_group (s);
678 /* These lists are circular. */
685 /* Make a BFD section from an ELF section. We store a pointer to the
686 BFD section in the bfd_section field of the header. */
689 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
691 Elf_Internal_Shdr *hdr;
696 struct elf_backend_data *bed;
698 if (hdr->bfd_section != NULL)
700 BFD_ASSERT (strcmp (name,
701 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
705 newsect = bfd_make_section_anyway (abfd, name);
709 newsect->filepos = hdr->sh_offset;
711 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
712 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
713 || ! bfd_set_section_alignment (abfd, newsect,
714 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
717 flags = SEC_NO_FLAGS;
718 if (hdr->sh_type != SHT_NOBITS)
719 flags |= SEC_HAS_CONTENTS;
720 if (hdr->sh_type == SHT_GROUP)
721 flags |= SEC_GROUP | SEC_EXCLUDE;
722 if ((hdr->sh_flags & SHF_ALLOC) != 0)
725 if (hdr->sh_type != SHT_NOBITS)
728 if ((hdr->sh_flags & SHF_WRITE) == 0)
729 flags |= SEC_READONLY;
730 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
732 else if ((flags & SEC_LOAD) != 0)
734 if ((hdr->sh_flags & SHF_MERGE) != 0)
737 newsect->entsize = hdr->sh_entsize;
738 if ((hdr->sh_flags & SHF_STRINGS) != 0)
739 flags |= SEC_STRINGS;
741 if (hdr->sh_flags & SHF_GROUP)
742 if (!setup_group (abfd, hdr, newsect))
744 if ((hdr->sh_flags & SHF_TLS) != 0)
745 flags |= SEC_THREAD_LOCAL;
747 /* The debugging sections appear to be recognized only by name, not
750 static const char *debug_sec_names [] =
759 for (i = ARRAY_SIZE (debug_sec_names); i--;)
760 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
764 flags |= SEC_DEBUGGING;
767 /* As a GNU extension, if the name begins with .gnu.linkonce, we
768 only link a single copy of the section. This is used to support
769 g++. g++ will emit each template expansion in its own section.
770 The symbols will be defined as weak, so that multiple definitions
771 are permitted. The GNU linker extension is to actually discard
772 all but one of the sections. */
773 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
774 && elf_next_in_group (newsect) == NULL)
775 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
777 bed = get_elf_backend_data (abfd);
778 if (bed->elf_backend_section_flags)
779 if (! bed->elf_backend_section_flags (&flags, hdr))
782 if (! bfd_set_section_flags (abfd, newsect, flags))
785 if ((flags & SEC_ALLOC) != 0)
787 Elf_Internal_Phdr *phdr;
790 /* Look through the phdrs to see if we need to adjust the lma.
791 If all the p_paddr fields are zero, we ignore them, since
792 some ELF linkers produce such output. */
793 phdr = elf_tdata (abfd)->phdr;
794 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
796 if (phdr->p_paddr != 0)
799 if (i < elf_elfheader (abfd)->e_phnum)
801 phdr = elf_tdata (abfd)->phdr;
802 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
804 /* This section is part of this segment if its file
805 offset plus size lies within the segment's memory
806 span and, if the section is loaded, the extent of the
807 loaded data lies within the extent of the segment.
809 Note - we used to check the p_paddr field as well, and
810 refuse to set the LMA if it was 0. This is wrong
811 though, as a perfectly valid initialised segment can
812 have a p_paddr of zero. Some architectures, eg ARM,
813 place special significance on the address 0 and
814 executables need to be able to have a segment which
815 covers this address. */
816 if (phdr->p_type == PT_LOAD
817 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
818 && (hdr->sh_offset + hdr->sh_size
819 <= phdr->p_offset + phdr->p_memsz)
820 && ((flags & SEC_LOAD) == 0
821 || (hdr->sh_offset + hdr->sh_size
822 <= phdr->p_offset + phdr->p_filesz)))
824 if ((flags & SEC_LOAD) == 0)
825 newsect->lma = (phdr->p_paddr
826 + hdr->sh_addr - phdr->p_vaddr);
828 /* We used to use the same adjustment for SEC_LOAD
829 sections, but that doesn't work if the segment
830 is packed with code from multiple VMAs.
831 Instead we calculate the section LMA based on
832 the segment LMA. It is assumed that the
833 segment will contain sections with contiguous
834 LMAs, even if the VMAs are not. */
835 newsect->lma = (phdr->p_paddr
836 + hdr->sh_offset - phdr->p_offset);
838 /* With contiguous segments, we can't tell from file
839 offsets whether a section with zero size should
840 be placed at the end of one segment or the
841 beginning of the next. Decide based on vaddr. */
842 if (hdr->sh_addr >= phdr->p_vaddr
843 && (hdr->sh_addr + hdr->sh_size
844 <= phdr->p_vaddr + phdr->p_memsz))
851 hdr->bfd_section = newsect;
852 elf_section_data (newsect)->this_hdr = *hdr;
862 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
865 Helper functions for GDB to locate the string tables.
866 Since BFD hides string tables from callers, GDB needs to use an
867 internal hook to find them. Sun's .stabstr, in particular,
868 isn't even pointed to by the .stab section, so ordinary
869 mechanisms wouldn't work to find it, even if we had some.
872 struct elf_internal_shdr *
873 bfd_elf_find_section (abfd, name)
877 Elf_Internal_Shdr **i_shdrp;
882 i_shdrp = elf_elfsections (abfd);
885 shstrtab = bfd_elf_get_str_section (abfd,
886 elf_elfheader (abfd)->e_shstrndx);
887 if (shstrtab != NULL)
889 max = elf_numsections (abfd);
890 for (i = 1; i < max; i++)
891 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
898 const char *const bfd_elf_section_type_names[] = {
899 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
900 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
901 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
904 /* ELF relocs are against symbols. If we are producing relocateable
905 output, and the reloc is against an external symbol, and nothing
906 has given us any additional addend, the resulting reloc will also
907 be against the same symbol. In such a case, we don't want to
908 change anything about the way the reloc is handled, since it will
909 all be done at final link time. Rather than put special case code
910 into bfd_perform_relocation, all the reloc types use this howto
911 function. It just short circuits the reloc if producing
912 relocateable output against an external symbol. */
914 bfd_reloc_status_type
915 bfd_elf_generic_reloc (abfd,
922 bfd *abfd ATTRIBUTE_UNUSED;
923 arelent *reloc_entry;
925 PTR data ATTRIBUTE_UNUSED;
926 asection *input_section;
928 char **error_message ATTRIBUTE_UNUSED;
930 if (output_bfd != (bfd *) NULL
931 && (symbol->flags & BSF_SECTION_SYM) == 0
932 && (! reloc_entry->howto->partial_inplace
933 || reloc_entry->addend == 0))
935 reloc_entry->address += input_section->output_offset;
939 return bfd_reloc_continue;
942 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
945 merge_sections_remove_hook (abfd, sec)
946 bfd *abfd ATTRIBUTE_UNUSED;
949 struct bfd_elf_section_data *sec_data;
951 sec_data = elf_section_data (sec);
952 BFD_ASSERT (sec_data->sec_info_type == ELF_INFO_TYPE_MERGE);
953 sec_data->sec_info_type = ELF_INFO_TYPE_NONE;
956 /* Finish SHF_MERGE section merging. */
959 _bfd_elf_merge_sections (abfd, info)
961 struct bfd_link_info *info;
963 if (!is_elf_hash_table (info))
965 if (elf_hash_table (info)->merge_info)
966 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
967 merge_sections_remove_hook);
972 _bfd_elf_link_just_syms (sec, info)
974 struct bfd_link_info *info;
976 sec->output_section = bfd_abs_section_ptr;
977 sec->output_offset = sec->vma;
978 if (!is_elf_hash_table (info))
981 elf_section_data (sec)->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
984 /* Copy the program header and other data from one object module to
988 _bfd_elf_copy_private_bfd_data (ibfd, obfd)
992 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
993 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
996 BFD_ASSERT (!elf_flags_init (obfd)
997 || (elf_elfheader (obfd)->e_flags
998 == elf_elfheader (ibfd)->e_flags));
1000 elf_gp (obfd) = elf_gp (ibfd);
1001 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1002 elf_flags_init (obfd) = true;
1006 /* Print out the program headers. */
1009 _bfd_elf_print_private_bfd_data (abfd, farg)
1013 FILE *f = (FILE *) farg;
1014 Elf_Internal_Phdr *p;
1016 bfd_byte *dynbuf = NULL;
1018 p = elf_tdata (abfd)->phdr;
1023 fprintf (f, _("\nProgram Header:\n"));
1024 c = elf_elfheader (abfd)->e_phnum;
1025 for (i = 0; i < c; i++, p++)
1032 case PT_NULL: pt = "NULL"; break;
1033 case PT_LOAD: pt = "LOAD"; break;
1034 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1035 case PT_INTERP: pt = "INTERP"; break;
1036 case PT_NOTE: pt = "NOTE"; break;
1037 case PT_SHLIB: pt = "SHLIB"; break;
1038 case PT_PHDR: pt = "PHDR"; break;
1039 case PT_TLS: pt = "TLS"; break;
1040 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1041 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1043 fprintf (f, "%8s off 0x", pt);
1044 bfd_fprintf_vma (abfd, f, p->p_offset);
1045 fprintf (f, " vaddr 0x");
1046 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1047 fprintf (f, " paddr 0x");
1048 bfd_fprintf_vma (abfd, f, p->p_paddr);
1049 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1050 fprintf (f, " filesz 0x");
1051 bfd_fprintf_vma (abfd, f, p->p_filesz);
1052 fprintf (f, " memsz 0x");
1053 bfd_fprintf_vma (abfd, f, p->p_memsz);
1054 fprintf (f, " flags %c%c%c",
1055 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1056 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1057 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1058 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1059 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1064 s = bfd_get_section_by_name (abfd, ".dynamic");
1068 unsigned long shlink;
1069 bfd_byte *extdyn, *extdynend;
1071 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1073 fprintf (f, _("\nDynamic Section:\n"));
1075 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1078 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1082 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1085 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1087 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1088 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1091 extdynend = extdyn + s->_raw_size;
1092 for (; extdyn < extdynend; extdyn += extdynsize)
1094 Elf_Internal_Dyn dyn;
1099 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1101 if (dyn.d_tag == DT_NULL)
1108 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1112 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
1113 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1114 case DT_PLTGOT: name = "PLTGOT"; break;
1115 case DT_HASH: name = "HASH"; break;
1116 case DT_STRTAB: name = "STRTAB"; break;
1117 case DT_SYMTAB: name = "SYMTAB"; break;
1118 case DT_RELA: name = "RELA"; break;
1119 case DT_RELASZ: name = "RELASZ"; break;
1120 case DT_RELAENT: name = "RELAENT"; break;
1121 case DT_STRSZ: name = "STRSZ"; break;
1122 case DT_SYMENT: name = "SYMENT"; break;
1123 case DT_INIT: name = "INIT"; break;
1124 case DT_FINI: name = "FINI"; break;
1125 case DT_SONAME: name = "SONAME"; stringp = true; break;
1126 case DT_RPATH: name = "RPATH"; stringp = true; break;
1127 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1128 case DT_REL: name = "REL"; break;
1129 case DT_RELSZ: name = "RELSZ"; break;
1130 case DT_RELENT: name = "RELENT"; break;
1131 case DT_PLTREL: name = "PLTREL"; break;
1132 case DT_DEBUG: name = "DEBUG"; break;
1133 case DT_TEXTREL: name = "TEXTREL"; break;
1134 case DT_JMPREL: name = "JMPREL"; break;
1135 case DT_BIND_NOW: name = "BIND_NOW"; break;
1136 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1137 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1138 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1139 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1140 case DT_RUNPATH: name = "RUNPATH"; stringp = true; break;
1141 case DT_FLAGS: name = "FLAGS"; break;
1142 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1143 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1144 case DT_CHECKSUM: name = "CHECKSUM"; break;
1145 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1146 case DT_MOVEENT: name = "MOVEENT"; break;
1147 case DT_MOVESZ: name = "MOVESZ"; break;
1148 case DT_FEATURE: name = "FEATURE"; break;
1149 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1150 case DT_SYMINSZ: name = "SYMINSZ"; break;
1151 case DT_SYMINENT: name = "SYMINENT"; break;
1152 case DT_CONFIG: name = "CONFIG"; stringp = true; break;
1153 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = true; break;
1154 case DT_AUDIT: name = "AUDIT"; stringp = true; break;
1155 case DT_PLTPAD: name = "PLTPAD"; break;
1156 case DT_MOVETAB: name = "MOVETAB"; break;
1157 case DT_SYMINFO: name = "SYMINFO"; break;
1158 case DT_RELACOUNT: name = "RELACOUNT"; break;
1159 case DT_RELCOUNT: name = "RELCOUNT"; break;
1160 case DT_FLAGS_1: name = "FLAGS_1"; break;
1161 case DT_VERSYM: name = "VERSYM"; break;
1162 case DT_VERDEF: name = "VERDEF"; break;
1163 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1164 case DT_VERNEED: name = "VERNEED"; break;
1165 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1166 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
1167 case DT_USED: name = "USED"; break;
1168 case DT_FILTER: name = "FILTER"; stringp = true; break;
1171 fprintf (f, " %-11s ", name);
1173 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1177 unsigned int tagv = dyn.d_un.d_val;
1179 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1182 fprintf (f, "%s", string);
1191 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1192 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1194 if (! _bfd_elf_slurp_version_tables (abfd))
1198 if (elf_dynverdef (abfd) != 0)
1200 Elf_Internal_Verdef *t;
1202 fprintf (f, _("\nVersion definitions:\n"));
1203 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1205 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1206 t->vd_flags, t->vd_hash, t->vd_nodename);
1207 if (t->vd_auxptr->vda_nextptr != NULL)
1209 Elf_Internal_Verdaux *a;
1212 for (a = t->vd_auxptr->vda_nextptr;
1215 fprintf (f, "%s ", a->vda_nodename);
1221 if (elf_dynverref (abfd) != 0)
1223 Elf_Internal_Verneed *t;
1225 fprintf (f, _("\nVersion References:\n"));
1226 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1228 Elf_Internal_Vernaux *a;
1230 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1231 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1232 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1233 a->vna_flags, a->vna_other, a->vna_nodename);
1245 /* Display ELF-specific fields of a symbol. */
1248 bfd_elf_print_symbol (abfd, filep, symbol, how)
1252 bfd_print_symbol_type how;
1254 FILE *file = (FILE *) filep;
1257 case bfd_print_symbol_name:
1258 fprintf (file, "%s", symbol->name);
1260 case bfd_print_symbol_more:
1261 fprintf (file, "elf ");
1262 bfd_fprintf_vma (abfd, file, symbol->value);
1263 fprintf (file, " %lx", (long) symbol->flags);
1265 case bfd_print_symbol_all:
1267 const char *section_name;
1268 const char *name = NULL;
1269 struct elf_backend_data *bed;
1270 unsigned char st_other;
1273 section_name = symbol->section ? symbol->section->name : "(*none*)";
1275 bed = get_elf_backend_data (abfd);
1276 if (bed->elf_backend_print_symbol_all)
1277 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1281 name = symbol->name;
1282 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1285 fprintf (file, " %s\t", section_name);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
1290 if (bfd_is_com_section (symbol->section))
1291 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1293 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1294 bfd_fprintf_vma (abfd, file, val);
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd)->dynversym_section != 0
1298 && (elf_tdata (abfd)->dynverdef_section != 0
1299 || elf_tdata (abfd)->dynverref_section != 0))
1301 unsigned int vernum;
1302 const char *version_string;
1304 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1307 version_string = "";
1308 else if (vernum == 1)
1309 version_string = "Base";
1310 else if (vernum <= elf_tdata (abfd)->cverdefs)
1312 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1315 Elf_Internal_Verneed *t;
1317 version_string = "";
1318 for (t = elf_tdata (abfd)->verref;
1322 Elf_Internal_Vernaux *a;
1324 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1326 if (a->vna_other == vernum)
1328 version_string = a->vna_nodename;
1335 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1336 fprintf (file, " %-11s", version_string);
1341 fprintf (file, " (%s)", version_string);
1342 for (i = 10 - strlen (version_string); i > 0; --i)
1347 /* If the st_other field is not zero, print it. */
1348 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1353 case STV_INTERNAL: fprintf (file, " .internal"); break;
1354 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1355 case STV_PROTECTED: fprintf (file, " .protected"); break;
1357 /* Some other non-defined flags are also present, so print
1359 fprintf (file, " 0x%02x", (unsigned int) st_other);
1362 fprintf (file, " %s", name);
1368 /* Create an entry in an ELF linker hash table. */
1370 struct bfd_hash_entry *
1371 _bfd_elf_link_hash_newfunc (entry, table, string)
1372 struct bfd_hash_entry *entry;
1373 struct bfd_hash_table *table;
1376 /* Allocate the structure if it has not already been allocated by a
1380 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1385 /* Call the allocation method of the superclass. */
1386 entry = _bfd_link_hash_newfunc (entry, table, string);
1389 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1390 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1392 /* Set local fields. */
1396 ret->dynstr_index = 0;
1397 ret->weakdef = NULL;
1398 ret->got.refcount = htab->init_refcount;
1399 ret->plt.refcount = htab->init_refcount;
1400 ret->linker_section_pointer = NULL;
1401 ret->verinfo.verdef = NULL;
1402 ret->vtable_entries_used = NULL;
1403 ret->vtable_entries_size = 0;
1404 ret->vtable_parent = NULL;
1405 ret->type = STT_NOTYPE;
1407 /* Assume that we have been called by a non-ELF symbol reader.
1408 This flag is then reset by the code which reads an ELF input
1409 file. This ensures that a symbol created by a non-ELF symbol
1410 reader will have the flag set correctly. */
1411 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1417 /* Copy data from an indirect symbol to its direct symbol, hiding the
1418 old indirect symbol. Also used for copying flags to a weakdef. */
1421 _bfd_elf_link_hash_copy_indirect (dir, ind)
1422 struct elf_link_hash_entry *dir, *ind;
1426 /* Copy down any references that we may have already seen to the
1427 symbol which just became indirect. */
1429 dir->elf_link_hash_flags |=
1430 (ind->elf_link_hash_flags
1431 & (ELF_LINK_HASH_REF_DYNAMIC
1432 | ELF_LINK_HASH_REF_REGULAR
1433 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1434 | ELF_LINK_NON_GOT_REF));
1436 if (ind->root.type != bfd_link_hash_indirect)
1439 /* Copy over the global and procedure linkage table refcount entries.
1440 These may have been already set up by a check_relocs routine. */
1441 tmp = dir->got.refcount;
1444 dir->got.refcount = ind->got.refcount;
1445 ind->got.refcount = tmp;
1448 BFD_ASSERT (ind->got.refcount <= 0);
1450 tmp = dir->plt.refcount;
1453 dir->plt.refcount = ind->plt.refcount;
1454 ind->plt.refcount = tmp;
1457 BFD_ASSERT (ind->plt.refcount <= 0);
1459 if (dir->dynindx == -1)
1461 dir->dynindx = ind->dynindx;
1462 dir->dynstr_index = ind->dynstr_index;
1464 ind->dynstr_index = 0;
1467 BFD_ASSERT (ind->dynindx == -1);
1471 _bfd_elf_link_hash_hide_symbol (info, h, force_local)
1472 struct bfd_link_info *info;
1473 struct elf_link_hash_entry *h;
1474 boolean force_local;
1476 h->plt.offset = (bfd_vma) -1;
1477 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1480 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1481 if (h->dynindx != -1)
1484 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1490 /* Initialize an ELF linker hash table. */
1493 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
1494 struct elf_link_hash_table *table;
1496 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
1497 struct bfd_hash_table *,
1502 table->dynamic_sections_created = false;
1503 table->dynobj = NULL;
1504 table->init_refcount = get_elf_backend_data (abfd)->can_refcount - 1;
1505 /* The first dynamic symbol is a dummy. */
1506 table->dynsymcount = 1;
1507 table->dynstr = NULL;
1508 table->bucketcount = 0;
1509 table->needed = NULL;
1510 table->runpath = NULL;
1511 table->loaded = NULL;
1513 table->stab_info = NULL;
1514 table->merge_info = NULL;
1515 table->dynlocal = NULL;
1516 ret = _bfd_link_hash_table_init (& table->root, abfd, newfunc);
1517 table->root.type = bfd_link_elf_hash_table;
1522 /* Create an ELF linker hash table. */
1524 struct bfd_link_hash_table *
1525 _bfd_elf_link_hash_table_create (abfd)
1528 struct elf_link_hash_table *ret;
1529 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1531 ret = (struct elf_link_hash_table *) bfd_malloc (amt);
1532 if (ret == (struct elf_link_hash_table *) NULL)
1535 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1544 /* This is a hook for the ELF emulation code in the generic linker to
1545 tell the backend linker what file name to use for the DT_NEEDED
1546 entry for a dynamic object. The generic linker passes name as an
1547 empty string to indicate that no DT_NEEDED entry should be made. */
1550 bfd_elf_set_dt_needed_name (abfd, name)
1554 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1555 && bfd_get_format (abfd) == bfd_object)
1556 elf_dt_name (abfd) = name;
1560 bfd_elf_set_dt_needed_soname (abfd, name)
1564 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1565 && bfd_get_format (abfd) == bfd_object)
1566 elf_dt_soname (abfd) = name;
1569 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1570 the linker ELF emulation code. */
1572 struct bfd_link_needed_list *
1573 bfd_elf_get_needed_list (abfd, info)
1574 bfd *abfd ATTRIBUTE_UNUSED;
1575 struct bfd_link_info *info;
1577 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1579 return elf_hash_table (info)->needed;
1582 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1583 hook for the linker ELF emulation code. */
1585 struct bfd_link_needed_list *
1586 bfd_elf_get_runpath_list (abfd, info)
1587 bfd *abfd ATTRIBUTE_UNUSED;
1588 struct bfd_link_info *info;
1590 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1592 return elf_hash_table (info)->runpath;
1595 /* Get the name actually used for a dynamic object for a link. This
1596 is the SONAME entry if there is one. Otherwise, it is the string
1597 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1600 bfd_elf_get_dt_soname (abfd)
1603 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1604 && bfd_get_format (abfd) == bfd_object)
1605 return elf_dt_name (abfd);
1609 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1610 the ELF linker emulation code. */
1613 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1615 struct bfd_link_needed_list **pneeded;
1618 bfd_byte *dynbuf = NULL;
1620 unsigned long shlink;
1621 bfd_byte *extdyn, *extdynend;
1623 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1627 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1628 || bfd_get_format (abfd) != bfd_object)
1631 s = bfd_get_section_by_name (abfd, ".dynamic");
1632 if (s == NULL || s->_raw_size == 0)
1635 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1639 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1643 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1647 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1649 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1650 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1653 extdynend = extdyn + s->_raw_size;
1654 for (; extdyn < extdynend; extdyn += extdynsize)
1656 Elf_Internal_Dyn dyn;
1658 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1660 if (dyn.d_tag == DT_NULL)
1663 if (dyn.d_tag == DT_NEEDED)
1666 struct bfd_link_needed_list *l;
1667 unsigned int tagv = dyn.d_un.d_val;
1670 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1675 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
1696 /* Allocate an ELF string table--force the first byte to be zero. */
1698 struct bfd_strtab_hash *
1699 _bfd_elf_stringtab_init ()
1701 struct bfd_strtab_hash *ret;
1703 ret = _bfd_stringtab_init ();
1708 loc = _bfd_stringtab_add (ret, "", true, false);
1709 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1710 if (loc == (bfd_size_type) -1)
1712 _bfd_stringtab_free (ret);
1719 /* ELF .o/exec file reading */
1721 /* Create a new bfd section from an ELF section header. */
1724 bfd_section_from_shdr (abfd, shindex)
1726 unsigned int shindex;
1728 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1729 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1730 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1733 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1735 switch (hdr->sh_type)
1738 /* Inactive section. Throw it away. */
1741 case SHT_PROGBITS: /* Normal section with contents. */
1742 case SHT_NOBITS: /* .bss section. */
1743 case SHT_HASH: /* .hash section. */
1744 case SHT_NOTE: /* .note section. */
1745 case SHT_INIT_ARRAY: /* .init_array section. */
1746 case SHT_FINI_ARRAY: /* .fini_array section. */
1747 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1748 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1750 case SHT_DYNAMIC: /* Dynamic linking information. */
1751 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1753 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1755 Elf_Internal_Shdr *dynsymhdr;
1757 /* The shared libraries distributed with hpux11 have a bogus
1758 sh_link field for the ".dynamic" section. Find the
1759 string table for the ".dynsym" section instead. */
1760 if (elf_dynsymtab (abfd) != 0)
1762 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1763 hdr->sh_link = dynsymhdr->sh_link;
1767 unsigned int i, num_sec;
1769 num_sec = elf_numsections (abfd);
1770 for (i = 1; i < num_sec; i++)
1772 dynsymhdr = elf_elfsections (abfd)[i];
1773 if (dynsymhdr->sh_type == SHT_DYNSYM)
1775 hdr->sh_link = dynsymhdr->sh_link;
1783 case SHT_SYMTAB: /* A symbol table */
1784 if (elf_onesymtab (abfd) == shindex)
1787 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1788 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1789 elf_onesymtab (abfd) = shindex;
1790 elf_tdata (abfd)->symtab_hdr = *hdr;
1791 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1792 abfd->flags |= HAS_SYMS;
1794 /* Sometimes a shared object will map in the symbol table. If
1795 SHF_ALLOC is set, and this is a shared object, then we also
1796 treat this section as a BFD section. We can not base the
1797 decision purely on SHF_ALLOC, because that flag is sometimes
1798 set in a relocateable object file, which would confuse the
1800 if ((hdr->sh_flags & SHF_ALLOC) != 0
1801 && (abfd->flags & DYNAMIC) != 0
1802 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1807 case SHT_DYNSYM: /* A dynamic symbol table */
1808 if (elf_dynsymtab (abfd) == shindex)
1811 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1812 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1813 elf_dynsymtab (abfd) = shindex;
1814 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1815 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1816 abfd->flags |= HAS_SYMS;
1818 /* Besides being a symbol table, we also treat this as a regular
1819 section, so that objcopy can handle it. */
1820 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1822 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1823 if (elf_symtab_shndx (abfd) == shindex)
1826 /* Get the associated symbol table. */
1827 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1828 || hdr->sh_link != elf_onesymtab (abfd))
1831 elf_symtab_shndx (abfd) = shindex;
1832 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1833 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1836 case SHT_STRTAB: /* A string table */
1837 if (hdr->bfd_section != NULL)
1839 if (ehdr->e_shstrndx == shindex)
1841 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1842 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1846 unsigned int i, num_sec;
1848 num_sec = elf_numsections (abfd);
1849 for (i = 1; i < num_sec; i++)
1851 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1852 if (hdr2->sh_link == shindex)
1854 if (! bfd_section_from_shdr (abfd, i))
1856 if (elf_onesymtab (abfd) == i)
1858 elf_tdata (abfd)->strtab_hdr = *hdr;
1859 elf_elfsections (abfd)[shindex] =
1860 &elf_tdata (abfd)->strtab_hdr;
1863 if (elf_dynsymtab (abfd) == i)
1865 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1866 elf_elfsections (abfd)[shindex] = hdr =
1867 &elf_tdata (abfd)->dynstrtab_hdr;
1868 /* We also treat this as a regular section, so
1869 that objcopy can handle it. */
1872 #if 0 /* Not handling other string tables specially right now. */
1873 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1874 /* We have a strtab for some random other section. */
1875 newsect = (asection *) hdr2->bfd_section;
1878 hdr->bfd_section = newsect;
1879 hdr2 = &elf_section_data (newsect)->str_hdr;
1881 elf_elfsections (abfd)[shindex] = hdr2;
1887 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1891 /* *These* do a lot of work -- but build no sections! */
1893 asection *target_sect;
1894 Elf_Internal_Shdr *hdr2;
1895 unsigned int num_sec = elf_numsections (abfd);
1897 /* Check for a bogus link to avoid crashing. */
1898 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1899 || hdr->sh_link >= num_sec)
1901 ((*_bfd_error_handler)
1902 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1903 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1904 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1907 /* For some incomprehensible reason Oracle distributes
1908 libraries for Solaris in which some of the objects have
1909 bogus sh_link fields. It would be nice if we could just
1910 reject them, but, unfortunately, some people need to use
1911 them. We scan through the section headers; if we find only
1912 one suitable symbol table, we clobber the sh_link to point
1913 to it. I hope this doesn't break anything. */
1914 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1915 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1921 for (scan = 1; scan < num_sec; scan++)
1923 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1924 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1935 hdr->sh_link = found;
1938 /* Get the symbol table. */
1939 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1940 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1943 /* If this reloc section does not use the main symbol table we
1944 don't treat it as a reloc section. BFD can't adequately
1945 represent such a section, so at least for now, we don't
1946 try. We just present it as a normal section. We also
1947 can't use it as a reloc section if it points to the null
1949 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1950 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1952 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1954 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1955 if (target_sect == NULL)
1958 if ((target_sect->flags & SEC_RELOC) == 0
1959 || target_sect->reloc_count == 0)
1960 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1964 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1965 amt = sizeof (*hdr2);
1966 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1967 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1970 elf_elfsections (abfd)[shindex] = hdr2;
1971 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1972 target_sect->flags |= SEC_RELOC;
1973 target_sect->relocation = NULL;
1974 target_sect->rel_filepos = hdr->sh_offset;
1975 /* In the section to which the relocations apply, mark whether
1976 its relocations are of the REL or RELA variety. */
1977 if (hdr->sh_size != 0)
1978 elf_section_data (target_sect)->use_rela_p
1979 = (hdr->sh_type == SHT_RELA);
1980 abfd->flags |= HAS_RELOC;
1985 case SHT_GNU_verdef:
1986 elf_dynverdef (abfd) = shindex;
1987 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1988 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1991 case SHT_GNU_versym:
1992 elf_dynversym (abfd) = shindex;
1993 elf_tdata (abfd)->dynversym_hdr = *hdr;
1994 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1997 case SHT_GNU_verneed:
1998 elf_dynverref (abfd) = shindex;
1999 elf_tdata (abfd)->dynverref_hdr = *hdr;
2000 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2007 /* We need a BFD section for objcopy and relocatable linking,
2008 and it's handy to have the signature available as the section
2010 name = group_signature (abfd, hdr);
2013 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
2015 if (hdr->contents != NULL)
2017 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2018 unsigned int n_elt = hdr->sh_size / 4;
2021 if (idx->flags & GRP_COMDAT)
2022 hdr->bfd_section->flags
2023 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2025 while (--n_elt != 0)
2026 if ((s = (++idx)->shdr->bfd_section) != NULL
2027 && elf_next_in_group (s) != NULL)
2029 elf_next_in_group (hdr->bfd_section) = s;
2036 /* Check for any processor-specific section types. */
2038 if (bed->elf_backend_section_from_shdr)
2039 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
2047 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2048 Return SEC for sections that have no elf section, and NULL on error. */
2051 bfd_section_from_r_symndx (abfd, cache, sec, r_symndx)
2053 struct sym_sec_cache *cache;
2055 unsigned long r_symndx;
2057 Elf_Internal_Shdr *symtab_hdr;
2058 unsigned char esym[sizeof (Elf64_External_Sym)];
2059 Elf_External_Sym_Shndx eshndx;
2060 Elf_Internal_Sym isym;
2061 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2063 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2064 return cache->sec[ent];
2066 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2067 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2068 &isym, esym, &eshndx) == NULL)
2071 if (cache->abfd != abfd)
2073 memset (cache->indx, -1, sizeof (cache->indx));
2076 cache->indx[ent] = r_symndx;
2077 cache->sec[ent] = sec;
2078 if (isym.st_shndx < SHN_LORESERVE || isym.st_shndx > SHN_HIRESERVE)
2081 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2083 cache->sec[ent] = s;
2085 return cache->sec[ent];
2088 /* Given an ELF section number, retrieve the corresponding BFD
2092 bfd_section_from_elf_index (abfd, index)
2096 if (index >= elf_numsections (abfd))
2098 return elf_elfsections (abfd)[index]->bfd_section;
2102 _bfd_elf_new_section_hook (abfd, sec)
2106 struct bfd_elf_section_data *sdata;
2107 bfd_size_type amt = sizeof (*sdata);
2109 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, amt);
2112 sec->used_by_bfd = (PTR) sdata;
2114 /* Indicate whether or not this section should use RELA relocations. */
2116 = get_elf_backend_data (abfd)->default_use_rela_p;
2121 /* Create a new bfd section from an ELF program header.
2123 Since program segments have no names, we generate a synthetic name
2124 of the form segment<NUM>, where NUM is generally the index in the
2125 program header table. For segments that are split (see below) we
2126 generate the names segment<NUM>a and segment<NUM>b.
2128 Note that some program segments may have a file size that is different than
2129 (less than) the memory size. All this means is that at execution the
2130 system must allocate the amount of memory specified by the memory size,
2131 but only initialize it with the first "file size" bytes read from the
2132 file. This would occur for example, with program segments consisting
2133 of combined data+bss.
2135 To handle the above situation, this routine generates TWO bfd sections
2136 for the single program segment. The first has the length specified by
2137 the file size of the segment, and the second has the length specified
2138 by the difference between the two sizes. In effect, the segment is split
2139 into it's initialized and uninitialized parts.
2144 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
2146 Elf_Internal_Phdr *hdr;
2148 const char *typename;
2156 split = ((hdr->p_memsz > 0)
2157 && (hdr->p_filesz > 0)
2158 && (hdr->p_memsz > hdr->p_filesz));
2159 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2160 len = strlen (namebuf) + 1;
2161 name = bfd_alloc (abfd, (bfd_size_type) len);
2164 memcpy (name, namebuf, len);
2165 newsect = bfd_make_section (abfd, name);
2166 if (newsect == NULL)
2168 newsect->vma = hdr->p_vaddr;
2169 newsect->lma = hdr->p_paddr;
2170 newsect->_raw_size = hdr->p_filesz;
2171 newsect->filepos = hdr->p_offset;
2172 newsect->flags |= SEC_HAS_CONTENTS;
2173 if (hdr->p_type == PT_LOAD)
2175 newsect->flags |= SEC_ALLOC;
2176 newsect->flags |= SEC_LOAD;
2177 if (hdr->p_flags & PF_X)
2179 /* FIXME: all we known is that it has execute PERMISSION,
2181 newsect->flags |= SEC_CODE;
2184 if (!(hdr->p_flags & PF_W))
2186 newsect->flags |= SEC_READONLY;
2191 sprintf (namebuf, "%s%db", typename, index);
2192 len = strlen (namebuf) + 1;
2193 name = bfd_alloc (abfd, (bfd_size_type) len);
2196 memcpy (name, namebuf, len);
2197 newsect = bfd_make_section (abfd, name);
2198 if (newsect == NULL)
2200 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2201 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2202 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2203 if (hdr->p_type == PT_LOAD)
2205 newsect->flags |= SEC_ALLOC;
2206 if (hdr->p_flags & PF_X)
2207 newsect->flags |= SEC_CODE;
2209 if (!(hdr->p_flags & PF_W))
2210 newsect->flags |= SEC_READONLY;
2217 bfd_section_from_phdr (abfd, hdr, index)
2219 Elf_Internal_Phdr *hdr;
2222 struct elf_backend_data *bed;
2224 switch (hdr->p_type)
2227 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2230 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2233 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2236 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2239 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2241 if (! elfcore_read_notes (abfd, (file_ptr) hdr->p_offset, hdr->p_filesz))
2246 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2249 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2252 /* Check for any processor-specific program segment types.
2253 If no handler for them, default to making "segment" sections. */
2254 bed = get_elf_backend_data (abfd);
2255 if (bed->elf_backend_section_from_phdr)
2256 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2258 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2262 /* Initialize REL_HDR, the section-header for new section, containing
2263 relocations against ASECT. If USE_RELA_P is true, we use RELA
2264 relocations; otherwise, we use REL relocations. */
2267 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
2269 Elf_Internal_Shdr *rel_hdr;
2274 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2275 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2277 name = bfd_alloc (abfd, amt);
2280 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2282 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2284 if (rel_hdr->sh_name == (unsigned int) -1)
2286 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2287 rel_hdr->sh_entsize = (use_rela_p
2288 ? bed->s->sizeof_rela
2289 : bed->s->sizeof_rel);
2290 rel_hdr->sh_addralign = bed->s->file_align;
2291 rel_hdr->sh_flags = 0;
2292 rel_hdr->sh_addr = 0;
2293 rel_hdr->sh_size = 0;
2294 rel_hdr->sh_offset = 0;
2299 /* Set up an ELF internal section header for a section. */
2302 elf_fake_sections (abfd, asect, failedptrarg)
2307 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2308 boolean *failedptr = (boolean *) failedptrarg;
2309 Elf_Internal_Shdr *this_hdr;
2313 /* We already failed; just get out of the bfd_map_over_sections
2318 this_hdr = &elf_section_data (asect)->this_hdr;
2320 this_hdr->sh_name = (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2321 asect->name, false);
2322 if (this_hdr->sh_name == (unsigned long) -1)
2328 this_hdr->sh_flags = 0;
2330 if ((asect->flags & SEC_ALLOC) != 0
2331 || asect->user_set_vma)
2332 this_hdr->sh_addr = asect->vma;
2334 this_hdr->sh_addr = 0;
2336 this_hdr->sh_offset = 0;
2337 this_hdr->sh_size = asect->_raw_size;
2338 this_hdr->sh_link = 0;
2339 this_hdr->sh_addralign = 1 << asect->alignment_power;
2340 /* The sh_entsize and sh_info fields may have been set already by
2341 copy_private_section_data. */
2343 this_hdr->bfd_section = asect;
2344 this_hdr->contents = NULL;
2346 /* FIXME: This should not be based on section names. */
2347 if (strcmp (asect->name, ".dynstr") == 0)
2348 this_hdr->sh_type = SHT_STRTAB;
2349 else if (strcmp (asect->name, ".hash") == 0)
2351 this_hdr->sh_type = SHT_HASH;
2352 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2354 else if (strcmp (asect->name, ".dynsym") == 0)
2356 this_hdr->sh_type = SHT_DYNSYM;
2357 this_hdr->sh_entsize = bed->s->sizeof_sym;
2359 else if (strcmp (asect->name, ".dynamic") == 0)
2361 this_hdr->sh_type = SHT_DYNAMIC;
2362 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2364 else if (strncmp (asect->name, ".rela", 5) == 0
2365 && get_elf_backend_data (abfd)->may_use_rela_p)
2367 this_hdr->sh_type = SHT_RELA;
2368 this_hdr->sh_entsize = bed->s->sizeof_rela;
2370 else if (strncmp (asect->name, ".rel", 4) == 0
2371 && get_elf_backend_data (abfd)->may_use_rel_p)
2373 this_hdr->sh_type = SHT_REL;
2374 this_hdr->sh_entsize = bed->s->sizeof_rel;
2376 else if (strcmp (asect->name, ".init_array") == 0)
2377 this_hdr->sh_type = SHT_INIT_ARRAY;
2378 else if (strcmp (asect->name, ".fini_array") == 0)
2379 this_hdr->sh_type = SHT_FINI_ARRAY;
2380 else if (strcmp (asect->name, ".preinit_array") == 0)
2381 this_hdr->sh_type = SHT_PREINIT_ARRAY;
2382 else if (strncmp (asect->name, ".note", 5) == 0)
2383 this_hdr->sh_type = SHT_NOTE;
2384 else if (strncmp (asect->name, ".stab", 5) == 0
2385 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
2386 this_hdr->sh_type = SHT_STRTAB;
2387 else if (strcmp (asect->name, ".gnu.version") == 0)
2389 this_hdr->sh_type = SHT_GNU_versym;
2390 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2392 else if (strcmp (asect->name, ".gnu.version_d") == 0)
2394 this_hdr->sh_type = SHT_GNU_verdef;
2395 this_hdr->sh_entsize = 0;
2396 /* objcopy or strip will copy over sh_info, but may not set
2397 cverdefs. The linker will set cverdefs, but sh_info will be
2399 if (this_hdr->sh_info == 0)
2400 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2402 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2403 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2405 else if (strcmp (asect->name, ".gnu.version_r") == 0)
2407 this_hdr->sh_type = SHT_GNU_verneed;
2408 this_hdr->sh_entsize = 0;
2409 /* objcopy or strip will copy over sh_info, but may not set
2410 cverrefs. The linker will set cverrefs, but sh_info will be
2412 if (this_hdr->sh_info == 0)
2413 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2415 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2416 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2418 else if ((asect->flags & SEC_GROUP) != 0)
2420 this_hdr->sh_type = SHT_GROUP;
2421 this_hdr->sh_entsize = 4;
2423 else if ((asect->flags & SEC_ALLOC) != 0
2424 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2425 || (asect->flags & SEC_NEVER_LOAD) != 0))
2426 this_hdr->sh_type = SHT_NOBITS;
2428 this_hdr->sh_type = SHT_PROGBITS;
2430 if ((asect->flags & SEC_ALLOC) != 0)
2431 this_hdr->sh_flags |= SHF_ALLOC;
2432 if ((asect->flags & SEC_READONLY) == 0)
2433 this_hdr->sh_flags |= SHF_WRITE;
2434 if ((asect->flags & SEC_CODE) != 0)
2435 this_hdr->sh_flags |= SHF_EXECINSTR;
2436 if ((asect->flags & SEC_MERGE) != 0)
2438 this_hdr->sh_flags |= SHF_MERGE;
2439 this_hdr->sh_entsize = asect->entsize;
2440 if ((asect->flags & SEC_STRINGS) != 0)
2441 this_hdr->sh_flags |= SHF_STRINGS;
2443 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2444 this_hdr->sh_flags |= SHF_GROUP;
2445 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2446 this_hdr->sh_flags |= SHF_TLS;
2448 /* Check for processor-specific section types. */
2449 if (bed->elf_backend_fake_sections
2450 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2453 /* If the section has relocs, set up a section header for the
2454 SHT_REL[A] section. If two relocation sections are required for
2455 this section, it is up to the processor-specific back-end to
2456 create the other. */
2457 if ((asect->flags & SEC_RELOC) != 0
2458 && !_bfd_elf_init_reloc_shdr (abfd,
2459 &elf_section_data (asect)->rel_hdr,
2461 elf_section_data (asect)->use_rela_p))
2465 /* Fill in the contents of a SHT_GROUP section. */
2468 bfd_elf_set_group_contents (abfd, sec, failedptrarg)
2473 boolean *failedptr = (boolean *) failedptrarg;
2474 unsigned long symindx;
2475 asection *elt, *first;
2477 struct bfd_link_order *l;
2480 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2485 if (elf_group_id (sec) != NULL)
2486 symindx = elf_group_id (sec)->udata.i;
2490 /* If called from the assembler, swap_out_syms will have set up
2491 elf_section_syms; If called for "ld -r", use target_index. */
2492 if (elf_section_syms (abfd) != NULL)
2493 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2495 symindx = sec->target_index;
2497 elf_section_data (sec)->this_hdr.sh_info = symindx;
2499 /* The contents won't be allocated for "ld -r" or objcopy. */
2501 if (sec->contents == NULL)
2504 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2506 /* Arrange for the section to be written out. */
2507 elf_section_data (sec)->this_hdr.contents = sec->contents;
2508 if (sec->contents == NULL)
2515 loc = sec->contents + sec->_raw_size;
2517 /* Get the pointer to the first section in the group that gas
2518 squirreled away here. objcopy arranges for this to be set to the
2519 start of the input section group. */
2520 first = elt = elf_next_in_group (sec);
2522 /* First element is a flag word. Rest of section is elf section
2523 indices for all the sections of the group. Write them backwards
2524 just to keep the group in the same order as given in .section
2525 directives, not that it matters. */
2534 s = s->output_section;
2537 idx = elf_section_data (s)->this_idx;
2538 H_PUT_32 (abfd, idx, loc);
2539 elt = elf_next_in_group (elt);
2544 /* If this is a relocatable link, then the above did nothing because
2545 SEC is the output section. Look through the input sections
2547 for (l = sec->link_order_head; l != NULL; l = l->next)
2548 if (l->type == bfd_indirect_link_order
2549 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2554 elf_section_data (elt->output_section)->this_idx, loc);
2555 elt = elf_next_in_group (elt);
2556 /* During a relocatable link, the lists are circular. */
2558 while (elt != elf_next_in_group (l->u.indirect.section));
2560 /* With ld -r, merging SHT_GROUP sections results in wasted space
2561 due to allowing for the flag word on each input. We may well
2562 duplicate entries too. */
2563 while ((loc -= 4) > sec->contents)
2564 H_PUT_32 (abfd, 0, loc);
2566 if (loc != sec->contents)
2569 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2572 /* Assign all ELF section numbers. The dummy first section is handled here
2573 too. The link/info pointers for the standard section types are filled
2574 in here too, while we're at it. */
2577 assign_section_numbers (abfd)
2580 struct elf_obj_tdata *t = elf_tdata (abfd);
2582 unsigned int section_number, secn;
2583 Elf_Internal_Shdr **i_shdrp;
2588 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2590 for (sec = abfd->sections; sec; sec = sec->next)
2592 struct bfd_elf_section_data *d = elf_section_data (sec);
2594 if (section_number == SHN_LORESERVE)
2595 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2596 d->this_idx = section_number++;
2597 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2598 if ((sec->flags & SEC_RELOC) == 0)
2602 if (section_number == SHN_LORESERVE)
2603 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2604 d->rel_idx = section_number++;
2605 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2610 if (section_number == SHN_LORESERVE)
2611 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2612 d->rel_idx2 = section_number++;
2613 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2619 if (section_number == SHN_LORESERVE)
2620 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2621 t->shstrtab_section = section_number++;
2622 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2623 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2625 if (bfd_get_symcount (abfd) > 0)
2627 if (section_number == SHN_LORESERVE)
2628 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2629 t->symtab_section = section_number++;
2630 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2631 if (section_number > SHN_LORESERVE - 2)
2633 if (section_number == SHN_LORESERVE)
2634 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2635 t->symtab_shndx_section = section_number++;
2636 t->symtab_shndx_hdr.sh_name
2637 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2638 ".symtab_shndx", false);
2639 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2642 if (section_number == SHN_LORESERVE)
2643 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2644 t->strtab_section = section_number++;
2645 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2648 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2649 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2651 elf_numsections (abfd) = section_number;
2652 elf_elfheader (abfd)->e_shnum = section_number;
2653 if (section_number > SHN_LORESERVE)
2654 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2656 /* Set up the list of section header pointers, in agreement with the
2658 amt = section_number * sizeof (Elf_Internal_Shdr *);
2659 i_shdrp = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
2660 if (i_shdrp == NULL)
2663 amt = sizeof (Elf_Internal_Shdr);
2664 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2665 if (i_shdrp[0] == NULL)
2667 bfd_release (abfd, i_shdrp);
2670 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
2672 elf_elfsections (abfd) = i_shdrp;
2674 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2675 if (bfd_get_symcount (abfd) > 0)
2677 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2678 if (elf_numsections (abfd) > SHN_LORESERVE)
2680 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2681 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2683 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2684 t->symtab_hdr.sh_link = t->strtab_section;
2686 for (sec = abfd->sections; sec; sec = sec->next)
2688 struct bfd_elf_section_data *d = elf_section_data (sec);
2692 i_shdrp[d->this_idx] = &d->this_hdr;
2693 if (d->rel_idx != 0)
2694 i_shdrp[d->rel_idx] = &d->rel_hdr;
2695 if (d->rel_idx2 != 0)
2696 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2698 /* Fill in the sh_link and sh_info fields while we're at it. */
2700 /* sh_link of a reloc section is the section index of the symbol
2701 table. sh_info is the section index of the section to which
2702 the relocation entries apply. */
2703 if (d->rel_idx != 0)
2705 d->rel_hdr.sh_link = t->symtab_section;
2706 d->rel_hdr.sh_info = d->this_idx;
2708 if (d->rel_idx2 != 0)
2710 d->rel_hdr2->sh_link = t->symtab_section;
2711 d->rel_hdr2->sh_info = d->this_idx;
2714 switch (d->this_hdr.sh_type)
2718 /* A reloc section which we are treating as a normal BFD
2719 section. sh_link is the section index of the symbol
2720 table. sh_info is the section index of the section to
2721 which the relocation entries apply. We assume that an
2722 allocated reloc section uses the dynamic symbol table.
2723 FIXME: How can we be sure? */
2724 s = bfd_get_section_by_name (abfd, ".dynsym");
2726 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2728 /* We look up the section the relocs apply to by name. */
2730 if (d->this_hdr.sh_type == SHT_REL)
2734 s = bfd_get_section_by_name (abfd, name);
2736 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2740 /* We assume that a section named .stab*str is a stabs
2741 string section. We look for a section with the same name
2742 but without the trailing ``str'', and set its sh_link
2743 field to point to this section. */
2744 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2745 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2750 len = strlen (sec->name);
2751 alc = (char *) bfd_malloc ((bfd_size_type) (len - 2));
2754 memcpy (alc, sec->name, len - 3);
2755 alc[len - 3] = '\0';
2756 s = bfd_get_section_by_name (abfd, alc);
2760 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2762 /* This is a .stab section. */
2763 elf_section_data (s)->this_hdr.sh_entsize =
2764 4 + 2 * bfd_get_arch_size (abfd) / 8;
2771 case SHT_GNU_verneed:
2772 case SHT_GNU_verdef:
2773 /* sh_link is the section header index of the string table
2774 used for the dynamic entries, or the symbol table, or the
2776 s = bfd_get_section_by_name (abfd, ".dynstr");
2778 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2782 case SHT_GNU_versym:
2783 /* sh_link is the section header index of the symbol table
2784 this hash table or version table is for. */
2785 s = bfd_get_section_by_name (abfd, ".dynsym");
2787 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2791 d->this_hdr.sh_link = t->symtab_section;
2795 for (secn = 1; secn < section_number; ++secn)
2796 if (i_shdrp[secn] == NULL)
2797 i_shdrp[secn] = i_shdrp[0];
2799 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2800 i_shdrp[secn]->sh_name);
2804 /* Map symbol from it's internal number to the external number, moving
2805 all local symbols to be at the head of the list. */
2808 sym_is_global (abfd, sym)
2812 /* If the backend has a special mapping, use it. */
2813 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2814 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2817 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2818 || bfd_is_und_section (bfd_get_section (sym))
2819 || bfd_is_com_section (bfd_get_section (sym)));
2823 elf_map_symbols (abfd)
2826 unsigned int symcount = bfd_get_symcount (abfd);
2827 asymbol **syms = bfd_get_outsymbols (abfd);
2828 asymbol **sect_syms;
2829 unsigned int num_locals = 0;
2830 unsigned int num_globals = 0;
2831 unsigned int num_locals2 = 0;
2832 unsigned int num_globals2 = 0;
2840 fprintf (stderr, "elf_map_symbols\n");
2844 for (asect = abfd->sections; asect; asect = asect->next)
2846 if (max_index < asect->index)
2847 max_index = asect->index;
2851 amt = max_index * sizeof (asymbol *);
2852 sect_syms = (asymbol **) bfd_zalloc (abfd, amt);
2853 if (sect_syms == NULL)
2855 elf_section_syms (abfd) = sect_syms;
2856 elf_num_section_syms (abfd) = max_index;
2858 /* Init sect_syms entries for any section symbols we have already
2859 decided to output. */
2860 for (idx = 0; idx < symcount; idx++)
2862 asymbol *sym = syms[idx];
2864 if ((sym->flags & BSF_SECTION_SYM) != 0
2871 if (sec->owner != NULL)
2873 if (sec->owner != abfd)
2875 if (sec->output_offset != 0)
2878 sec = sec->output_section;
2880 /* Empty sections in the input files may have had a
2881 section symbol created for them. (See the comment
2882 near the end of _bfd_generic_link_output_symbols in
2883 linker.c). If the linker script discards such
2884 sections then we will reach this point. Since we know
2885 that we cannot avoid this case, we detect it and skip
2886 the abort and the assignment to the sect_syms array.
2887 To reproduce this particular case try running the
2888 linker testsuite test ld-scripts/weak.exp for an ELF
2889 port that uses the generic linker. */
2890 if (sec->owner == NULL)
2893 BFD_ASSERT (sec->owner == abfd);
2895 sect_syms[sec->index] = syms[idx];
2900 /* Classify all of the symbols. */
2901 for (idx = 0; idx < symcount; idx++)
2903 if (!sym_is_global (abfd, syms[idx]))
2909 /* We will be adding a section symbol for each BFD section. Most normal
2910 sections will already have a section symbol in outsymbols, but
2911 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2912 at least in that case. */
2913 for (asect = abfd->sections; asect; asect = asect->next)
2915 if (sect_syms[asect->index] == NULL)
2917 if (!sym_is_global (abfd, asect->symbol))
2924 /* Now sort the symbols so the local symbols are first. */
2925 amt = (num_locals + num_globals) * sizeof (asymbol *);
2926 new_syms = (asymbol **) bfd_alloc (abfd, amt);
2928 if (new_syms == NULL)
2931 for (idx = 0; idx < symcount; idx++)
2933 asymbol *sym = syms[idx];
2936 if (!sym_is_global (abfd, sym))
2939 i = num_locals + num_globals2++;
2941 sym->udata.i = i + 1;
2943 for (asect = abfd->sections; asect; asect = asect->next)
2945 if (sect_syms[asect->index] == NULL)
2947 asymbol *sym = asect->symbol;
2950 sect_syms[asect->index] = sym;
2951 if (!sym_is_global (abfd, sym))
2954 i = num_locals + num_globals2++;
2956 sym->udata.i = i + 1;
2960 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
2962 elf_num_locals (abfd) = num_locals;
2963 elf_num_globals (abfd) = num_globals;
2967 /* Align to the maximum file alignment that could be required for any
2968 ELF data structure. */
2970 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
2971 static INLINE file_ptr
2972 align_file_position (off, align)
2976 return (off + align - 1) & ~(align - 1);
2979 /* Assign a file position to a section, optionally aligning to the
2980 required section alignment. */
2983 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
2984 Elf_Internal_Shdr *i_shdrp;
2992 al = i_shdrp->sh_addralign;
2994 offset = BFD_ALIGN (offset, al);
2996 i_shdrp->sh_offset = offset;
2997 if (i_shdrp->bfd_section != NULL)
2998 i_shdrp->bfd_section->filepos = offset;
2999 if (i_shdrp->sh_type != SHT_NOBITS)
3000 offset += i_shdrp->sh_size;
3004 /* Compute the file positions we are going to put the sections at, and
3005 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3006 is not NULL, this is being called by the ELF backend linker. */
3009 _bfd_elf_compute_section_file_positions (abfd, link_info)
3011 struct bfd_link_info *link_info;
3013 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3015 struct bfd_strtab_hash *strtab;
3016 Elf_Internal_Shdr *shstrtab_hdr;
3018 if (abfd->output_has_begun)
3021 /* Do any elf backend specific processing first. */
3022 if (bed->elf_backend_begin_write_processing)
3023 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3025 if (! prep_headers (abfd))
3028 /* Post process the headers if necessary. */
3029 if (bed->elf_backend_post_process_headers)
3030 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3033 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3037 if (!assign_section_numbers (abfd))
3040 /* The backend linker builds symbol table information itself. */
3041 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3043 /* Non-zero if doing a relocatable link. */
3044 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3046 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3050 if (link_info == NULL)
3052 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3057 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3058 /* sh_name was set in prep_headers. */
3059 shstrtab_hdr->sh_type = SHT_STRTAB;
3060 shstrtab_hdr->sh_flags = 0;
3061 shstrtab_hdr->sh_addr = 0;
3062 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3063 shstrtab_hdr->sh_entsize = 0;
3064 shstrtab_hdr->sh_link = 0;
3065 shstrtab_hdr->sh_info = 0;
3066 /* sh_offset is set in assign_file_positions_except_relocs. */
3067 shstrtab_hdr->sh_addralign = 1;
3069 if (!assign_file_positions_except_relocs (abfd))
3072 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3075 Elf_Internal_Shdr *hdr;
3077 off = elf_tdata (abfd)->next_file_pos;
3079 hdr = &elf_tdata (abfd)->symtab_hdr;
3080 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3082 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3083 if (hdr->sh_size != 0)
3084 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3086 hdr = &elf_tdata (abfd)->strtab_hdr;
3087 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3089 elf_tdata (abfd)->next_file_pos = off;
3091 /* Now that we know where the .strtab section goes, write it
3093 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3094 || ! _bfd_stringtab_emit (abfd, strtab))
3096 _bfd_stringtab_free (strtab);
3099 abfd->output_has_begun = true;
3104 /* Create a mapping from a set of sections to a program segment. */
3106 static INLINE struct elf_segment_map *
3107 make_mapping (abfd, sections, from, to, phdr)
3109 asection **sections;
3114 struct elf_segment_map *m;
3119 amt = sizeof (struct elf_segment_map);
3120 amt += (to - from - 1) * sizeof (asection *);
3121 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3125 m->p_type = PT_LOAD;
3126 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3127 m->sections[i - from] = *hdrpp;
3128 m->count = to - from;
3130 if (from == 0 && phdr)
3132 /* Include the headers in the first PT_LOAD segment. */
3133 m->includes_filehdr = 1;
3134 m->includes_phdrs = 1;
3140 /* Set up a mapping from BFD sections to program segments. */
3143 map_sections_to_segments (abfd)
3146 asection **sections = NULL;
3150 struct elf_segment_map *mfirst;
3151 struct elf_segment_map **pm;
3152 struct elf_segment_map *m;
3154 unsigned int phdr_index;
3155 bfd_vma maxpagesize;
3157 boolean phdr_in_segment = true;
3160 asection *first_tls = NULL;
3161 asection *dynsec, *eh_frame_hdr;
3164 if (elf_tdata (abfd)->segment_map != NULL)
3167 if (bfd_count_sections (abfd) == 0)
3170 /* Select the allocated sections, and sort them. */
3172 amt = bfd_count_sections (abfd) * sizeof (asection *);
3173 sections = (asection **) bfd_malloc (amt);
3174 if (sections == NULL)
3178 for (s = abfd->sections; s != NULL; s = s->next)
3180 if ((s->flags & SEC_ALLOC) != 0)
3186 BFD_ASSERT (i <= bfd_count_sections (abfd));
3189 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3191 /* Build the mapping. */
3196 /* If we have a .interp section, then create a PT_PHDR segment for
3197 the program headers and a PT_INTERP segment for the .interp
3199 s = bfd_get_section_by_name (abfd, ".interp");
3200 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3202 amt = sizeof (struct elf_segment_map);
3203 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3207 m->p_type = PT_PHDR;
3208 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3209 m->p_flags = PF_R | PF_X;
3210 m->p_flags_valid = 1;
3211 m->includes_phdrs = 1;
3216 amt = sizeof (struct elf_segment_map);
3217 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3221 m->p_type = PT_INTERP;
3229 /* Look through the sections. We put sections in the same program
3230 segment when the start of the second section can be placed within
3231 a few bytes of the end of the first section. */
3234 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3236 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3238 && (dynsec->flags & SEC_LOAD) == 0)
3241 /* Deal with -Ttext or something similar such that the first section
3242 is not adjacent to the program headers. This is an
3243 approximation, since at this point we don't know exactly how many
3244 program headers we will need. */
3247 bfd_size_type phdr_size;
3249 phdr_size = elf_tdata (abfd)->program_header_size;
3251 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3252 if ((abfd->flags & D_PAGED) == 0
3253 || sections[0]->lma < phdr_size
3254 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3255 phdr_in_segment = false;
3258 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3261 boolean new_segment;
3265 /* See if this section and the last one will fit in the same
3268 if (last_hdr == NULL)
3270 /* If we don't have a segment yet, then we don't need a new
3271 one (we build the last one after this loop). */
3272 new_segment = false;
3274 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3276 /* If this section has a different relation between the
3277 virtual address and the load address, then we need a new
3281 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3282 < BFD_ALIGN (hdr->lma, maxpagesize))
3284 /* If putting this section in this segment would force us to
3285 skip a page in the segment, then we need a new segment. */
3288 else if ((last_hdr->flags & SEC_LOAD) == 0
3289 && (hdr->flags & SEC_LOAD) != 0)
3291 /* We don't want to put a loadable section after a
3292 nonloadable section in the same segment. */
3295 else if ((abfd->flags & D_PAGED) == 0)
3297 /* If the file is not demand paged, which means that we
3298 don't require the sections to be correctly aligned in the
3299 file, then there is no other reason for a new segment. */
3300 new_segment = false;
3303 && (hdr->flags & SEC_READONLY) == 0
3304 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3307 /* We don't want to put a writable section in a read only
3308 segment, unless they are on the same page in memory
3309 anyhow. We already know that the last section does not
3310 bring us past the current section on the page, so the
3311 only case in which the new section is not on the same
3312 page as the previous section is when the previous section
3313 ends precisely on a page boundary. */
3318 /* Otherwise, we can use the same segment. */
3319 new_segment = false;
3324 if ((hdr->flags & SEC_READONLY) == 0)
3330 /* We need a new program segment. We must create a new program
3331 header holding all the sections from phdr_index until hdr. */
3333 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3340 if ((hdr->flags & SEC_READONLY) == 0)
3347 phdr_in_segment = false;
3350 /* Create a final PT_LOAD program segment. */
3351 if (last_hdr != NULL)
3353 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3361 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3364 amt = sizeof (struct elf_segment_map);
3365 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3369 m->p_type = PT_DYNAMIC;
3371 m->sections[0] = dynsec;
3377 /* For each loadable .note section, add a PT_NOTE segment. We don't
3378 use bfd_get_section_by_name, because if we link together
3379 nonloadable .note sections and loadable .note sections, we will
3380 generate two .note sections in the output file. FIXME: Using
3381 names for section types is bogus anyhow. */
3382 for (s = abfd->sections; s != NULL; s = s->next)
3384 if ((s->flags & SEC_LOAD) != 0
3385 && strncmp (s->name, ".note", 5) == 0)
3387 amt = sizeof (struct elf_segment_map);
3388 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3392 m->p_type = PT_NOTE;
3399 if (s->flags & SEC_THREAD_LOCAL)
3407 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3412 amt = sizeof (struct elf_segment_map);
3413 amt += (tls_count - 1) * sizeof (asection *);
3414 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3419 m->count = tls_count;
3420 /* Mandated PF_R. */
3422 m->p_flags_valid = 1;
3423 for (i = 0; i < tls_count; ++i)
3425 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3426 m->sections[i] = first_tls;
3427 first_tls = first_tls->next;
3434 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3436 eh_frame_hdr = NULL;
3437 if (elf_tdata (abfd)->eh_frame_hdr)
3438 eh_frame_hdr = bfd_get_section_by_name (abfd, ".eh_frame_hdr");
3439 if (eh_frame_hdr != NULL && (eh_frame_hdr->flags & SEC_LOAD))
3441 amt = sizeof (struct elf_segment_map);
3442 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3446 m->p_type = PT_GNU_EH_FRAME;
3448 m->sections[0] = eh_frame_hdr;
3457 elf_tdata (abfd)->segment_map = mfirst;
3461 if (sections != NULL)
3466 /* Sort sections by address. */
3469 elf_sort_sections (arg1, arg2)
3473 const asection *sec1 = *(const asection **) arg1;
3474 const asection *sec2 = *(const asection **) arg2;
3476 /* Sort by LMA first, since this is the address used to
3477 place the section into a segment. */
3478 if (sec1->lma < sec2->lma)
3480 else if (sec1->lma > sec2->lma)
3483 /* Then sort by VMA. Normally the LMA and the VMA will be
3484 the same, and this will do nothing. */
3485 if (sec1->vma < sec2->vma)
3487 else if (sec1->vma > sec2->vma)
3490 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3492 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3498 /* If the indicies are the same, do not return 0
3499 here, but continue to try the next comparison. */
3500 if (sec1->target_index - sec2->target_index != 0)
3501 return sec1->target_index - sec2->target_index;
3506 else if (TOEND (sec2))
3511 /* Sort by size, to put zero sized sections
3512 before others at the same address. */
3514 if (sec1->_raw_size < sec2->_raw_size)
3516 if (sec1->_raw_size > sec2->_raw_size)
3519 return sec1->target_index - sec2->target_index;
3522 /* Assign file positions to the sections based on the mapping from
3523 sections to segments. This function also sets up some fields in
3524 the file header, and writes out the program headers. */
3527 assign_file_positions_for_segments (abfd)
3530 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3532 struct elf_segment_map *m;
3534 Elf_Internal_Phdr *phdrs;
3536 bfd_vma filehdr_vaddr, filehdr_paddr;
3537 bfd_vma phdrs_vaddr, phdrs_paddr;
3538 Elf_Internal_Phdr *p;
3541 if (elf_tdata (abfd)->segment_map == NULL)
3543 if (! map_sections_to_segments (abfd))
3548 /* The placement algorithm assumes that non allocated sections are
3549 not in PT_LOAD segments. We ensure this here by removing such
3550 sections from the segment map. */
3551 for (m = elf_tdata (abfd)->segment_map;
3555 unsigned int new_count;
3558 if (m->p_type != PT_LOAD)
3562 for (i = 0; i < m->count; i ++)
3564 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3567 m->sections[new_count] = m->sections[i];
3573 if (new_count != m->count)
3574 m->count = new_count;
3578 if (bed->elf_backend_modify_segment_map)
3580 if (! (*bed->elf_backend_modify_segment_map) (abfd))
3585 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3588 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3589 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3590 elf_elfheader (abfd)->e_phnum = count;
3595 /* If we already counted the number of program segments, make sure
3596 that we allocated enough space. This happens when SIZEOF_HEADERS
3597 is used in a linker script. */
3598 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3599 if (alloc != 0 && count > alloc)
3601 ((*_bfd_error_handler)
3602 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3603 bfd_get_filename (abfd), alloc, count));
3604 bfd_set_error (bfd_error_bad_value);
3611 amt = alloc * sizeof (Elf_Internal_Phdr);
3612 phdrs = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
3616 off = bed->s->sizeof_ehdr;
3617 off += alloc * bed->s->sizeof_phdr;
3624 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3631 /* If elf_segment_map is not from map_sections_to_segments, the
3632 sections may not be correctly ordered. NOTE: sorting should
3633 not be done to the PT_NOTE section of a corefile, which may
3634 contain several pseudo-sections artificially created by bfd.
3635 Sorting these pseudo-sections breaks things badly. */
3637 && !(elf_elfheader (abfd)->e_type == ET_CORE
3638 && m->p_type == PT_NOTE))
3639 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3642 p->p_type = m->p_type;
3643 p->p_flags = m->p_flags;
3645 if (p->p_type == PT_LOAD
3647 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3649 if ((abfd->flags & D_PAGED) != 0)
3650 off += (m->sections[0]->vma - off) % bed->maxpagesize;
3653 bfd_size_type align;
3656 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3658 bfd_size_type secalign;
3660 secalign = bfd_get_section_alignment (abfd, *secpp);
3661 if (secalign > align)
3665 off += (m->sections[0]->vma - off) % (1 << align);
3672 p->p_vaddr = m->sections[0]->vma;
3674 if (m->p_paddr_valid)
3675 p->p_paddr = m->p_paddr;
3676 else if (m->count == 0)
3679 p->p_paddr = m->sections[0]->lma;
3681 if (p->p_type == PT_LOAD
3682 && (abfd->flags & D_PAGED) != 0)
3683 p->p_align = bed->maxpagesize;
3684 else if (m->count == 0)
3685 p->p_align = bed->s->file_align;
3693 if (m->includes_filehdr)
3695 if (! m->p_flags_valid)
3698 p->p_filesz = bed->s->sizeof_ehdr;
3699 p->p_memsz = bed->s->sizeof_ehdr;
3702 BFD_ASSERT (p->p_type == PT_LOAD);
3704 if (p->p_vaddr < (bfd_vma) off)
3706 (*_bfd_error_handler)
3707 (_("%s: Not enough room for program headers, try linking with -N"),
3708 bfd_get_filename (abfd));
3709 bfd_set_error (bfd_error_bad_value);
3714 if (! m->p_paddr_valid)
3717 if (p->p_type == PT_LOAD)
3719 filehdr_vaddr = p->p_vaddr;
3720 filehdr_paddr = p->p_paddr;
3724 if (m->includes_phdrs)
3726 if (! m->p_flags_valid)
3729 if (m->includes_filehdr)
3731 if (p->p_type == PT_LOAD)
3733 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3734 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3739 p->p_offset = bed->s->sizeof_ehdr;
3743 BFD_ASSERT (p->p_type == PT_LOAD);
3744 p->p_vaddr -= off - p->p_offset;
3745 if (! m->p_paddr_valid)
3746 p->p_paddr -= off - p->p_offset;
3749 if (p->p_type == PT_LOAD)
3751 phdrs_vaddr = p->p_vaddr;
3752 phdrs_paddr = p->p_paddr;
3755 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3758 p->p_filesz += alloc * bed->s->sizeof_phdr;
3759 p->p_memsz += alloc * bed->s->sizeof_phdr;
3762 if (p->p_type == PT_LOAD
3763 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3765 if (! m->includes_filehdr && ! m->includes_phdrs)
3771 adjust = off - (p->p_offset + p->p_filesz);
3772 p->p_filesz += adjust;
3773 p->p_memsz += adjust;
3779 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3783 bfd_size_type align;
3787 align = 1 << bfd_get_section_alignment (abfd, sec);
3789 /* The section may have artificial alignment forced by a
3790 link script. Notice this case by the gap between the
3791 cumulative phdr lma and the section's lma. */
3792 if (p->p_paddr + p->p_memsz < sec->lma)
3794 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3796 p->p_memsz += adjust;
3799 if ((flags & SEC_LOAD) != 0)
3800 p->p_filesz += adjust;
3803 if (p->p_type == PT_LOAD)
3805 bfd_signed_vma adjust;
3807 if ((flags & SEC_LOAD) != 0)
3809 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3813 else if ((flags & SEC_ALLOC) != 0)
3815 /* The section VMA must equal the file position
3816 modulo the page size. FIXME: I'm not sure if
3817 this adjustment is really necessary. We used to
3818 not have the SEC_LOAD case just above, and then
3819 this was necessary, but now I'm not sure. */
3820 if ((abfd->flags & D_PAGED) != 0)
3821 adjust = (sec->vma - voff) % bed->maxpagesize;
3823 adjust = (sec->vma - voff) % align;
3832 (* _bfd_error_handler) (_("\
3833 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3834 bfd_section_name (abfd, sec),
3839 p->p_memsz += adjust;
3842 if ((flags & SEC_LOAD) != 0)
3843 p->p_filesz += adjust;
3848 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3849 used in a linker script we may have a section with
3850 SEC_LOAD clear but which is supposed to have
3852 if ((flags & SEC_LOAD) != 0
3853 || (flags & SEC_HAS_CONTENTS) != 0)
3854 off += sec->_raw_size;
3856 if ((flags & SEC_ALLOC) != 0)
3857 voff += sec->_raw_size;
3860 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3862 /* The actual "note" segment has i == 0.
3863 This is the one that actually contains everything. */
3867 p->p_filesz = sec->_raw_size;
3868 off += sec->_raw_size;
3873 /* Fake sections -- don't need to be written. */
3876 flags = sec->flags = 0;
3883 p->p_memsz += sec->_raw_size;
3885 if ((flags & SEC_LOAD) != 0)
3886 p->p_filesz += sec->_raw_size;
3888 if (p->p_type == PT_TLS
3889 && sec->_raw_size == 0
3890 && (sec->flags & SEC_HAS_CONTENTS) == 0)
3892 struct bfd_link_order *o;
3893 bfd_vma tbss_size = 0;
3895 for (o = sec->link_order_head; o != NULL; o = o->next)
3896 if (tbss_size < o->offset + o->size)
3897 tbss_size = o->offset + o->size;
3899 p->p_memsz += tbss_size;
3902 if (align > p->p_align
3903 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
3907 if (! m->p_flags_valid)
3910 if ((flags & SEC_CODE) != 0)
3912 if ((flags & SEC_READONLY) == 0)
3918 /* Now that we have set the section file positions, we can set up
3919 the file positions for the non PT_LOAD segments. */
3920 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3924 if (p->p_type != PT_LOAD && m->count > 0)
3926 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
3927 p->p_offset = m->sections[0]->filepos;
3931 if (m->includes_filehdr)
3933 p->p_vaddr = filehdr_vaddr;
3934 if (! m->p_paddr_valid)
3935 p->p_paddr = filehdr_paddr;
3937 else if (m->includes_phdrs)
3939 p->p_vaddr = phdrs_vaddr;
3940 if (! m->p_paddr_valid)
3941 p->p_paddr = phdrs_paddr;
3946 /* If additional nonloadable filepos adjustments are required,
3948 if (bed->set_nonloadable_filepos)
3949 (*bed->set_nonloadable_filepos) (abfd, phdrs);
3951 /* Clear out any program headers we allocated but did not use. */
3952 for (; count < alloc; count++, p++)
3954 memset (p, 0, sizeof *p);
3955 p->p_type = PT_NULL;
3958 elf_tdata (abfd)->phdr = phdrs;
3960 elf_tdata (abfd)->next_file_pos = off;
3962 /* Write out the program headers. */
3963 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
3964 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
3970 /* Get the size of the program header.
3972 If this is called by the linker before any of the section VMA's are set, it
3973 can't calculate the correct value for a strange memory layout. This only
3974 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3975 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3976 data segment (exclusive of .interp and .dynamic).
3978 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3979 will be two segments. */
3981 static bfd_size_type
3982 get_program_header_size (abfd)
3987 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3989 /* We can't return a different result each time we're called. */
3990 if (elf_tdata (abfd)->program_header_size != 0)
3991 return elf_tdata (abfd)->program_header_size;
3993 if (elf_tdata (abfd)->segment_map != NULL)
3995 struct elf_segment_map *m;
3998 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4000 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4001 return elf_tdata (abfd)->program_header_size;
4004 /* Assume we will need exactly two PT_LOAD segments: one for text
4005 and one for data. */
4008 s = bfd_get_section_by_name (abfd, ".interp");
4009 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4011 /* If we have a loadable interpreter section, we need a
4012 PT_INTERP segment. In this case, assume we also need a
4013 PT_PHDR segment, although that may not be true for all
4018 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4020 /* We need a PT_DYNAMIC segment. */
4024 if (elf_tdata (abfd)->eh_frame_hdr
4025 && bfd_get_section_by_name (abfd, ".eh_frame_hdr") != NULL)
4027 /* We need a PT_GNU_EH_FRAME segment. */
4031 for (s = abfd->sections; s != NULL; s = s->next)
4033 if ((s->flags & SEC_LOAD) != 0
4034 && strncmp (s->name, ".note", 5) == 0)
4036 /* We need a PT_NOTE segment. */
4041 for (s = abfd->sections; s != NULL; s = s->next)
4043 if (s->flags & SEC_THREAD_LOCAL)
4045 /* We need a PT_TLS segment. */
4051 /* Let the backend count up any program headers it might need. */
4052 if (bed->elf_backend_additional_program_headers)
4056 a = (*bed->elf_backend_additional_program_headers) (abfd);
4062 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4063 return elf_tdata (abfd)->program_header_size;
4066 /* Work out the file positions of all the sections. This is called by
4067 _bfd_elf_compute_section_file_positions. All the section sizes and
4068 VMAs must be known before this is called.
4070 We do not consider reloc sections at this point, unless they form
4071 part of the loadable image. Reloc sections are assigned file
4072 positions in assign_file_positions_for_relocs, which is called by
4073 write_object_contents and final_link.
4075 We also don't set the positions of the .symtab and .strtab here. */
4078 assign_file_positions_except_relocs (abfd)
4081 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4082 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4083 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4084 unsigned int num_sec = elf_numsections (abfd);
4086 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4088 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4089 && bfd_get_format (abfd) != bfd_core)
4091 Elf_Internal_Shdr **hdrpp;
4094 /* Start after the ELF header. */
4095 off = i_ehdrp->e_ehsize;
4097 /* We are not creating an executable, which means that we are
4098 not creating a program header, and that the actual order of
4099 the sections in the file is unimportant. */
4100 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4102 Elf_Internal_Shdr *hdr;
4105 if (hdr->sh_type == SHT_REL
4106 || hdr->sh_type == SHT_RELA
4107 || i == tdata->symtab_section
4108 || i == tdata->symtab_shndx_section
4109 || i == tdata->strtab_section)
4111 hdr->sh_offset = -1;
4114 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
4116 if (i == SHN_LORESERVE - 1)
4118 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4119 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4126 Elf_Internal_Shdr **hdrpp;
4128 /* Assign file positions for the loaded sections based on the
4129 assignment of sections to segments. */
4130 if (! assign_file_positions_for_segments (abfd))
4133 /* Assign file positions for the other sections. */
4135 off = elf_tdata (abfd)->next_file_pos;
4136 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4138 Elf_Internal_Shdr *hdr;
4141 if (hdr->bfd_section != NULL
4142 && hdr->bfd_section->filepos != 0)
4143 hdr->sh_offset = hdr->bfd_section->filepos;
4144 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4146 ((*_bfd_error_handler)
4147 (_("%s: warning: allocated section `%s' not in segment"),
4148 bfd_get_filename (abfd),
4149 (hdr->bfd_section == NULL
4151 : hdr->bfd_section->name)));
4152 if ((abfd->flags & D_PAGED) != 0)
4153 off += (hdr->sh_addr - off) % bed->maxpagesize;
4155 off += (hdr->sh_addr - off) % hdr->sh_addralign;
4156 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4159 else if (hdr->sh_type == SHT_REL
4160 || hdr->sh_type == SHT_RELA
4161 || hdr == i_shdrpp[tdata->symtab_section]
4162 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4163 || hdr == i_shdrpp[tdata->strtab_section])
4164 hdr->sh_offset = -1;
4166 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
4168 if (i == SHN_LORESERVE - 1)
4170 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4171 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4176 /* Place the section headers. */
4177 off = align_file_position (off, bed->s->file_align);
4178 i_ehdrp->e_shoff = off;
4179 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4181 elf_tdata (abfd)->next_file_pos = off;
4190 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4191 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4192 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4193 struct elf_strtab_hash *shstrtab;
4194 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4196 i_ehdrp = elf_elfheader (abfd);
4197 i_shdrp = elf_elfsections (abfd);
4199 shstrtab = _bfd_elf_strtab_init ();
4200 if (shstrtab == NULL)
4203 elf_shstrtab (abfd) = shstrtab;
4205 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4206 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4207 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4208 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4210 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4211 i_ehdrp->e_ident[EI_DATA] =
4212 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4213 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4215 if ((abfd->flags & DYNAMIC) != 0)
4216 i_ehdrp->e_type = ET_DYN;
4217 else if ((abfd->flags & EXEC_P) != 0)
4218 i_ehdrp->e_type = ET_EXEC;
4219 else if (bfd_get_format (abfd) == bfd_core)
4220 i_ehdrp->e_type = ET_CORE;
4222 i_ehdrp->e_type = ET_REL;
4224 switch (bfd_get_arch (abfd))
4226 case bfd_arch_unknown:
4227 i_ehdrp->e_machine = EM_NONE;
4230 /* There used to be a long list of cases here, each one setting
4231 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4232 in the corresponding bfd definition. To avoid duplication,
4233 the switch was removed. Machines that need special handling
4234 can generally do it in elf_backend_final_write_processing(),
4235 unless they need the information earlier than the final write.
4236 Such need can generally be supplied by replacing the tests for
4237 e_machine with the conditions used to determine it. */
4239 if (get_elf_backend_data (abfd) != NULL)
4240 i_ehdrp->e_machine = get_elf_backend_data (abfd)->elf_machine_code;
4242 i_ehdrp->e_machine = EM_NONE;
4245 i_ehdrp->e_version = bed->s->ev_current;
4246 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4248 /* No program header, for now. */
4249 i_ehdrp->e_phoff = 0;
4250 i_ehdrp->e_phentsize = 0;
4251 i_ehdrp->e_phnum = 0;
4253 /* Each bfd section is section header entry. */
4254 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4255 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4257 /* If we're building an executable, we'll need a program header table. */
4258 if (abfd->flags & EXEC_P)
4260 /* It all happens later. */
4262 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4264 /* elf_build_phdrs() returns a (NULL-terminated) array of
4265 Elf_Internal_Phdrs. */
4266 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4267 i_ehdrp->e_phoff = outbase;
4268 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4273 i_ehdrp->e_phentsize = 0;
4275 i_ehdrp->e_phoff = 0;
4278 elf_tdata (abfd)->symtab_hdr.sh_name =
4279 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", false);
4280 elf_tdata (abfd)->strtab_hdr.sh_name =
4281 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", false);
4282 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4283 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", false);
4284 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4285 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4286 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4292 /* Assign file positions for all the reloc sections which are not part
4293 of the loadable file image. */
4296 _bfd_elf_assign_file_positions_for_relocs (abfd)
4300 unsigned int i, num_sec;
4301 Elf_Internal_Shdr **shdrpp;
4303 off = elf_tdata (abfd)->next_file_pos;
4305 num_sec = elf_numsections (abfd);
4306 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4308 Elf_Internal_Shdr *shdrp;
4311 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4312 && shdrp->sh_offset == -1)
4313 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
4316 elf_tdata (abfd)->next_file_pos = off;
4320 _bfd_elf_write_object_contents (abfd)
4323 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4324 Elf_Internal_Ehdr *i_ehdrp;
4325 Elf_Internal_Shdr **i_shdrp;
4327 unsigned int count, num_sec;
4329 if (! abfd->output_has_begun
4330 && ! _bfd_elf_compute_section_file_positions
4331 (abfd, (struct bfd_link_info *) NULL))
4334 i_shdrp = elf_elfsections (abfd);
4335 i_ehdrp = elf_elfheader (abfd);
4338 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4342 _bfd_elf_assign_file_positions_for_relocs (abfd);
4344 /* After writing the headers, we need to write the sections too... */
4345 num_sec = elf_numsections (abfd);
4346 for (count = 1; count < num_sec; count++)
4348 if (bed->elf_backend_section_processing)
4349 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4350 if (i_shdrp[count]->contents)
4352 bfd_size_type amt = i_shdrp[count]->sh_size;
4354 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4355 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4358 if (count == SHN_LORESERVE - 1)
4359 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4362 /* Write out the section header names. */
4363 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4364 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4367 if (bed->elf_backend_final_write_processing)
4368 (*bed->elf_backend_final_write_processing) (abfd,
4369 elf_tdata (abfd)->linker);
4371 return bed->s->write_shdrs_and_ehdr (abfd);
4375 _bfd_elf_write_corefile_contents (abfd)
4378 /* Hopefully this can be done just like an object file. */
4379 return _bfd_elf_write_object_contents (abfd);
4382 /* Given a section, search the header to find them. */
4385 _bfd_elf_section_from_bfd_section (abfd, asect)
4389 struct elf_backend_data *bed;
4392 if (elf_section_data (asect) != NULL
4393 && elf_section_data (asect)->this_idx != 0)
4394 return elf_section_data (asect)->this_idx;
4396 if (bfd_is_abs_section (asect))
4398 else if (bfd_is_com_section (asect))
4400 else if (bfd_is_und_section (asect))
4404 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4405 int maxindex = elf_numsections (abfd);
4407 for (index = 1; index < maxindex; index++)
4409 Elf_Internal_Shdr *hdr = i_shdrp[index];
4411 if (hdr != NULL && hdr->bfd_section == asect)
4417 bed = get_elf_backend_data (abfd);
4418 if (bed->elf_backend_section_from_bfd_section)
4422 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4427 bfd_set_error (bfd_error_nonrepresentable_section);
4432 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4436 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
4438 asymbol **asym_ptr_ptr;
4440 asymbol *asym_ptr = *asym_ptr_ptr;
4442 flagword flags = asym_ptr->flags;
4444 /* When gas creates relocations against local labels, it creates its
4445 own symbol for the section, but does put the symbol into the
4446 symbol chain, so udata is 0. When the linker is generating
4447 relocatable output, this section symbol may be for one of the
4448 input sections rather than the output section. */
4449 if (asym_ptr->udata.i == 0
4450 && (flags & BSF_SECTION_SYM)
4451 && asym_ptr->section)
4455 if (asym_ptr->section->output_section != NULL)
4456 indx = asym_ptr->section->output_section->index;
4458 indx = asym_ptr->section->index;
4459 if (indx < elf_num_section_syms (abfd)
4460 && elf_section_syms (abfd)[indx] != NULL)
4461 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4464 idx = asym_ptr->udata.i;
4468 /* This case can occur when using --strip-symbol on a symbol
4469 which is used in a relocation entry. */
4470 (*_bfd_error_handler)
4471 (_("%s: symbol `%s' required but not present"),
4472 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4473 bfd_set_error (bfd_error_no_symbols);
4480 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4481 (long) asym_ptr, asym_ptr->name, idx, flags,
4482 elf_symbol_flags (flags));
4490 /* Copy private BFD data. This copies any program header information. */
4493 copy_private_bfd_data (ibfd, obfd)
4497 Elf_Internal_Ehdr * iehdr;
4498 struct elf_segment_map * map;
4499 struct elf_segment_map * map_first;
4500 struct elf_segment_map ** pointer_to_map;
4501 Elf_Internal_Phdr * segment;
4504 unsigned int num_segments;
4505 boolean phdr_included = false;
4506 bfd_vma maxpagesize;
4507 struct elf_segment_map * phdr_adjust_seg = NULL;
4508 unsigned int phdr_adjust_num = 0;
4509 struct elf_backend_data * bed;
4511 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4512 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4515 if (elf_tdata (ibfd)->phdr == NULL)
4518 bed = get_elf_backend_data (ibfd);
4519 iehdr = elf_elfheader (ibfd);
4522 pointer_to_map = &map_first;
4524 num_segments = elf_elfheader (ibfd)->e_phnum;
4525 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4527 /* Returns the end address of the segment + 1. */
4528 #define SEGMENT_END(segment, start) \
4529 (start + (segment->p_memsz > segment->p_filesz \
4530 ? segment->p_memsz : segment->p_filesz))
4532 /* Returns true if the given section is contained within
4533 the given segment. VMA addresses are compared. */
4534 #define IS_CONTAINED_BY_VMA(section, segment) \
4535 (section->vma >= segment->p_vaddr \
4536 && (section->vma + section->_raw_size \
4537 <= (SEGMENT_END (segment, segment->p_vaddr))))
4539 /* Returns true if the given section is contained within
4540 the given segment. LMA addresses are compared. */
4541 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4542 (section->lma >= base \
4543 && (section->lma + section->_raw_size \
4544 <= SEGMENT_END (segment, base)))
4546 /* Returns true if the given section is contained within the
4547 given segment. Filepos addresses are compared in an elf
4548 backend function. */
4549 #define IS_CONTAINED_BY_FILEPOS(sec, seg, bed) \
4550 (bed->is_contained_by_filepos \
4551 && (*bed->is_contained_by_filepos) (sec, seg))
4553 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4554 #define IS_COREFILE_NOTE(p, s) \
4555 (p->p_type == PT_NOTE \
4556 && bfd_get_format (ibfd) == bfd_core \
4557 && s->vma == 0 && s->lma == 0 \
4558 && (bfd_vma) s->filepos >= p->p_offset \
4559 && ((bfd_vma) s->filepos + s->_raw_size \
4560 <= p->p_offset + p->p_filesz))
4562 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4563 linker, which generates a PT_INTERP section with p_vaddr and
4564 p_memsz set to 0. */
4565 #define IS_SOLARIS_PT_INTERP(p, s) \
4567 && p->p_paddr == 0 \
4568 && p->p_memsz == 0 \
4569 && p->p_filesz > 0 \
4570 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4571 && s->_raw_size > 0 \
4572 && (bfd_vma) s->filepos >= p->p_offset \
4573 && ((bfd_vma) s->filepos + s->_raw_size \
4574 <= p->p_offset + p->p_filesz))
4576 /* Decide if the given section should be included in the given segment.
4577 A section will be included if:
4578 1. It is within the address space of the segment -- we use the LMA
4579 if that is set for the segment and the VMA otherwise,
4580 2. It is an allocated segment,
4581 3. There is an output section associated with it,
4582 4. The section has not already been allocated to a previous segment. */
4583 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4584 ((((segment->p_paddr \
4585 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4586 : IS_CONTAINED_BY_VMA (section, segment)) \
4587 && (section->flags & SEC_ALLOC) != 0) \
4588 || IS_COREFILE_NOTE (segment, section) \
4589 || (IS_CONTAINED_BY_FILEPOS (section, segment, bed) \
4590 && (section->flags & SEC_ALLOC) == 0)) \
4591 && section->output_section != NULL \
4592 && ! section->segment_mark)
4594 /* Returns true iff seg1 starts after the end of seg2. */
4595 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4596 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4598 /* Returns true iff seg1 and seg2 overlap. */
4599 #define SEGMENT_OVERLAPS(seg1, seg2) \
4600 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) \
4601 || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4603 /* Initialise the segment mark field. */
4604 for (section = ibfd->sections; section != NULL; section = section->next)
4605 section->segment_mark = false;
4607 /* Scan through the segments specified in the program header
4608 of the input BFD. For this first scan we look for overlaps
4609 in the loadable segments. These can be created by weird
4610 parameters to objcopy. Also, fix some solaris weirdness. */
4611 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4616 Elf_Internal_Phdr *segment2;
4618 if (segment->p_type == PT_INTERP)
4619 for (section = ibfd->sections; section; section = section->next)
4620 if (IS_SOLARIS_PT_INTERP (segment, section))
4622 /* Mininal change so that the normal section to segment
4623 assigment code will work. */
4624 segment->p_vaddr = section->vma;
4628 if (segment->p_type != PT_LOAD)
4631 /* Determine if this segment overlaps any previous segments. */
4632 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4634 bfd_signed_vma extra_length;
4636 if (segment2->p_type != PT_LOAD
4637 || ! SEGMENT_OVERLAPS (segment, segment2))
4640 /* Merge the two segments together. */
4641 if (segment2->p_vaddr < segment->p_vaddr)
4643 /* Extend SEGMENT2 to include SEGMENT and then delete
4646 SEGMENT_END (segment, segment->p_vaddr)
4647 - SEGMENT_END (segment2, segment2->p_vaddr);
4649 if (extra_length > 0)
4651 segment2->p_memsz += extra_length;
4652 segment2->p_filesz += extra_length;
4655 segment->p_type = PT_NULL;
4657 /* Since we have deleted P we must restart the outer loop. */
4659 segment = elf_tdata (ibfd)->phdr;
4664 /* Extend SEGMENT to include SEGMENT2 and then delete
4667 SEGMENT_END (segment2, segment2->p_vaddr)
4668 - SEGMENT_END (segment, segment->p_vaddr);
4670 if (extra_length > 0)
4672 segment->p_memsz += extra_length;
4673 segment->p_filesz += extra_length;
4676 segment2->p_type = PT_NULL;
4681 /* The second scan attempts to assign sections to segments. */
4682 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4686 unsigned int section_count;
4687 asection ** sections;
4688 asection * output_section;
4690 bfd_vma matching_lma;
4691 bfd_vma suggested_lma;
4695 if (segment->p_type == PT_NULL)
4698 /* Compute how many sections might be placed into this segment. */
4700 for (section = ibfd->sections; section != NULL; section = section->next)
4701 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4704 /* Allocate a segment map big enough to contain all of the
4705 sections we have selected. */
4706 amt = sizeof (struct elf_segment_map);
4707 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4708 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4712 /* Initialise the fields of the segment map. Default to
4713 using the physical address of the segment in the input BFD. */
4715 map->p_type = segment->p_type;
4716 map->p_flags = segment->p_flags;
4717 map->p_flags_valid = 1;
4718 map->p_paddr = segment->p_paddr;
4719 map->p_paddr_valid = 1;
4721 /* Determine if this segment contains the ELF file header
4722 and if it contains the program headers themselves. */
4723 map->includes_filehdr = (segment->p_offset == 0
4724 && segment->p_filesz >= iehdr->e_ehsize);
4726 map->includes_phdrs = 0;
4728 if (! phdr_included || segment->p_type != PT_LOAD)
4730 map->includes_phdrs =
4731 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4732 && (segment->p_offset + segment->p_filesz
4733 >= ((bfd_vma) iehdr->e_phoff
4734 + iehdr->e_phnum * iehdr->e_phentsize)));
4736 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4737 phdr_included = true;
4740 if (section_count == 0)
4742 /* Special segments, such as the PT_PHDR segment, may contain
4743 no sections, but ordinary, loadable segments should contain
4744 something. They are allowed by the ELF spec however, so only
4745 a warning is produced. */
4746 if (segment->p_type == PT_LOAD)
4747 (*_bfd_error_handler)
4748 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4749 bfd_archive_filename (ibfd));
4752 *pointer_to_map = map;
4753 pointer_to_map = &map->next;
4758 /* Now scan the sections in the input BFD again and attempt
4759 to add their corresponding output sections to the segment map.
4760 The problem here is how to handle an output section which has
4761 been moved (ie had its LMA changed). There are four possibilities:
4763 1. None of the sections have been moved.
4764 In this case we can continue to use the segment LMA from the
4767 2. All of the sections have been moved by the same amount.
4768 In this case we can change the segment's LMA to match the LMA
4769 of the first section.
4771 3. Some of the sections have been moved, others have not.
4772 In this case those sections which have not been moved can be
4773 placed in the current segment which will have to have its size,
4774 and possibly its LMA changed, and a new segment or segments will
4775 have to be created to contain the other sections.
4777 4. The sections have been moved, but not be the same amount.
4778 In this case we can change the segment's LMA to match the LMA
4779 of the first section and we will have to create a new segment
4780 or segments to contain the other sections.
4782 In order to save time, we allocate an array to hold the section
4783 pointers that we are interested in. As these sections get assigned
4784 to a segment, they are removed from this array. */
4786 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4787 to work around this long long bug. */
4788 amt = section_count * sizeof (asection *);
4789 sections = (asection **) bfd_malloc (amt);
4790 if (sections == NULL)
4793 /* Step One: Scan for segment vs section LMA conflicts.
4794 Also add the sections to the section array allocated above.
4795 Also add the sections to the current segment. In the common
4796 case, where the sections have not been moved, this means that
4797 we have completely filled the segment, and there is nothing
4803 for (j = 0, section = ibfd->sections;
4805 section = section->next)
4807 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4809 output_section = section->output_section;
4811 sections[j ++] = section;
4813 /* The Solaris native linker always sets p_paddr to 0.
4814 We try to catch that case here, and set it to the
4816 if (segment->p_paddr == 0
4817 && segment->p_vaddr != 0
4819 && output_section->lma != 0
4820 && (output_section->vma == (segment->p_vaddr
4821 + (map->includes_filehdr
4824 + (map->includes_phdrs
4826 * iehdr->e_phentsize)
4828 map->p_paddr = segment->p_vaddr;
4830 /* Match up the physical address of the segment with the
4831 LMA address of the output section. */
4832 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4833 || IS_CONTAINED_BY_FILEPOS (section, segment, bed)
4834 || IS_COREFILE_NOTE (segment, section))
4836 if (matching_lma == 0)
4837 matching_lma = output_section->lma;
4839 /* We assume that if the section fits within the segment
4840 then it does not overlap any other section within that
4842 map->sections[isec ++] = output_section;
4844 else if (suggested_lma == 0)
4845 suggested_lma = output_section->lma;
4849 BFD_ASSERT (j == section_count);
4851 /* Step Two: Adjust the physical address of the current segment,
4853 if (isec == section_count)
4855 /* All of the sections fitted within the segment as currently
4856 specified. This is the default case. Add the segment to
4857 the list of built segments and carry on to process the next
4858 program header in the input BFD. */
4859 map->count = section_count;
4860 *pointer_to_map = map;
4861 pointer_to_map = &map->next;
4868 if (matching_lma != 0)
4870 /* At least one section fits inside the current segment.
4871 Keep it, but modify its physical address to match the
4872 LMA of the first section that fitted. */
4873 map->p_paddr = matching_lma;
4877 /* None of the sections fitted inside the current segment.
4878 Change the current segment's physical address to match
4879 the LMA of the first section. */
4880 map->p_paddr = suggested_lma;
4883 /* Offset the segment physical address from the lma
4884 to allow for space taken up by elf headers. */
4885 if (map->includes_filehdr)
4886 map->p_paddr -= iehdr->e_ehsize;
4888 if (map->includes_phdrs)
4890 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
4892 /* iehdr->e_phnum is just an estimate of the number
4893 of program headers that we will need. Make a note
4894 here of the number we used and the segment we chose
4895 to hold these headers, so that we can adjust the
4896 offset when we know the correct value. */
4897 phdr_adjust_num = iehdr->e_phnum;
4898 phdr_adjust_seg = map;
4902 /* Step Three: Loop over the sections again, this time assigning
4903 those that fit to the current segment and removing them from the
4904 sections array; but making sure not to leave large gaps. Once all
4905 possible sections have been assigned to the current segment it is
4906 added to the list of built segments and if sections still remain
4907 to be assigned, a new segment is constructed before repeating
4915 /* Fill the current segment with sections that fit. */
4916 for (j = 0; j < section_count; j++)
4918 section = sections[j];
4920 if (section == NULL)
4923 output_section = section->output_section;
4925 BFD_ASSERT (output_section != NULL);
4927 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4928 || IS_COREFILE_NOTE (segment, section))
4930 if (map->count == 0)
4932 /* If the first section in a segment does not start at
4933 the beginning of the segment, then something is
4935 if (output_section->lma !=
4937 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
4938 + (map->includes_phdrs
4939 ? iehdr->e_phnum * iehdr->e_phentsize
4945 asection * prev_sec;
4947 prev_sec = map->sections[map->count - 1];
4949 /* If the gap between the end of the previous section
4950 and the start of this section is more than
4951 maxpagesize then we need to start a new segment. */
4952 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
4954 < BFD_ALIGN (output_section->lma, maxpagesize))
4955 || ((prev_sec->lma + prev_sec->_raw_size)
4956 > output_section->lma))
4958 if (suggested_lma == 0)
4959 suggested_lma = output_section->lma;
4965 map->sections[map->count++] = output_section;
4968 section->segment_mark = true;
4970 else if (suggested_lma == 0)
4971 suggested_lma = output_section->lma;
4974 BFD_ASSERT (map->count > 0);
4976 /* Add the current segment to the list of built segments. */
4977 *pointer_to_map = map;
4978 pointer_to_map = &map->next;
4980 if (isec < section_count)
4982 /* We still have not allocated all of the sections to
4983 segments. Create a new segment here, initialise it
4984 and carry on looping. */
4985 amt = sizeof (struct elf_segment_map);
4986 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4987 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4991 /* Initialise the fields of the segment map. Set the physical
4992 physical address to the LMA of the first section that has
4993 not yet been assigned. */
4995 map->p_type = segment->p_type;
4996 map->p_flags = segment->p_flags;
4997 map->p_flags_valid = 1;
4998 map->p_paddr = suggested_lma;
4999 map->p_paddr_valid = 1;
5000 map->includes_filehdr = 0;
5001 map->includes_phdrs = 0;
5004 while (isec < section_count);
5009 /* The Solaris linker creates program headers in which all the
5010 p_paddr fields are zero. When we try to objcopy or strip such a
5011 file, we get confused. Check for this case, and if we find it
5012 reset the p_paddr_valid fields. */
5013 for (map = map_first; map != NULL; map = map->next)
5014 if (map->p_paddr != 0)
5018 for (map = map_first; map != NULL; map = map->next)
5019 map->p_paddr_valid = 0;
5022 elf_tdata (obfd)->segment_map = map_first;
5024 /* If we had to estimate the number of program headers that were
5025 going to be needed, then check our estimate now and adjust
5026 the offset if necessary. */
5027 if (phdr_adjust_seg != NULL)
5031 for (count = 0, map = map_first; map != NULL; map = map->next)
5034 if (count > phdr_adjust_num)
5035 phdr_adjust_seg->p_paddr
5036 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5040 /* Final Step: Sort the segments into ascending order of physical
5042 if (map_first != NULL)
5044 struct elf_segment_map *prev;
5047 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5049 /* Yes I know - its a bubble sort.... */
5050 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5052 /* Swap map and map->next. */
5053 prev->next = map->next;
5054 map->next = map->next->next;
5055 prev->next->next = map;
5065 #undef IS_CONTAINED_BY_VMA
5066 #undef IS_CONTAINED_BY_LMA
5067 #undef IS_CONTAINED_BY_FILEPOS
5068 #undef IS_COREFILE_NOTE
5069 #undef IS_SOLARIS_PT_INTERP
5070 #undef INCLUDE_SECTION_IN_SEGMENT
5071 #undef SEGMENT_AFTER_SEGMENT
5072 #undef SEGMENT_OVERLAPS
5076 /* Copy private section information. This copies over the entsize
5077 field, and sometimes the info field. */
5080 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
5086 Elf_Internal_Shdr *ihdr, *ohdr;
5087 const struct elf_backend_data *bed = get_elf_backend_data (ibfd);
5089 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5090 || obfd->xvec->flavour != bfd_target_elf_flavour)
5093 /* Copy over private BFD data if it has not already been copied.
5094 This must be done here, rather than in the copy_private_bfd_data
5095 entry point, because the latter is called after the section
5096 contents have been set, which means that the program headers have
5097 already been worked out. The backend function provides a way to
5098 override the test conditions and code path for the call to
5099 copy_private_bfd_data. */
5100 if (bed->copy_private_bfd_data_p)
5102 if ((*bed->copy_private_bfd_data_p) (ibfd, isec, obfd, osec))
5103 if (! copy_private_bfd_data (ibfd, obfd))
5106 else if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5110 /* Only set up the segments if there are no more SEC_ALLOC
5111 sections. FIXME: This won't do the right thing if objcopy is
5112 used to remove the last SEC_ALLOC section, since objcopy
5113 won't call this routine in that case. */
5114 for (s = isec->next; s != NULL; s = s->next)
5115 if ((s->flags & SEC_ALLOC) != 0)
5119 if (! copy_private_bfd_data (ibfd, obfd))
5124 ihdr = &elf_section_data (isec)->this_hdr;
5125 ohdr = &elf_section_data (osec)->this_hdr;
5127 ohdr->sh_entsize = ihdr->sh_entsize;
5129 if (ihdr->sh_type == SHT_SYMTAB
5130 || ihdr->sh_type == SHT_DYNSYM
5131 || ihdr->sh_type == SHT_GNU_verneed
5132 || ihdr->sh_type == SHT_GNU_verdef)
5133 ohdr->sh_info = ihdr->sh_info;
5135 /* Set things up for objcopy. The output SHT_GROUP section will
5136 have its elf_next_in_group pointing back to the input group
5138 elf_next_in_group (osec) = elf_next_in_group (isec);
5139 elf_group_name (osec) = elf_group_name (isec);
5141 elf_section_data (osec)->use_rela_p
5142 = elf_section_data (isec)->use_rela_p;
5147 /* Copy private symbol information. If this symbol is in a section
5148 which we did not map into a BFD section, try to map the section
5149 index correctly. We use special macro definitions for the mapped
5150 section indices; these definitions are interpreted by the
5151 swap_out_syms function. */
5153 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5154 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5155 #define MAP_STRTAB (SHN_HIOS + 3)
5156 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5157 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5160 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
5166 elf_symbol_type *isym, *osym;
5168 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5169 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5172 isym = elf_symbol_from (ibfd, isymarg);
5173 osym = elf_symbol_from (obfd, osymarg);
5177 && bfd_is_abs_section (isym->symbol.section))
5181 shndx = isym->internal_elf_sym.st_shndx;
5182 if (shndx == elf_onesymtab (ibfd))
5183 shndx = MAP_ONESYMTAB;
5184 else if (shndx == elf_dynsymtab (ibfd))
5185 shndx = MAP_DYNSYMTAB;
5186 else if (shndx == elf_tdata (ibfd)->strtab_section)
5188 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5189 shndx = MAP_SHSTRTAB;
5190 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5191 shndx = MAP_SYM_SHNDX;
5192 osym->internal_elf_sym.st_shndx = shndx;
5198 /* Swap out the symbols. */
5201 swap_out_syms (abfd, sttp, relocatable_p)
5203 struct bfd_strtab_hash **sttp;
5206 struct elf_backend_data *bed;
5209 struct bfd_strtab_hash *stt;
5210 Elf_Internal_Shdr *symtab_hdr;
5211 Elf_Internal_Shdr *symtab_shndx_hdr;
5212 Elf_Internal_Shdr *symstrtab_hdr;
5213 char *outbound_syms;
5214 char *outbound_shndx;
5218 if (!elf_map_symbols (abfd))
5221 /* Dump out the symtabs. */
5222 stt = _bfd_elf_stringtab_init ();
5226 bed = get_elf_backend_data (abfd);
5227 symcount = bfd_get_symcount (abfd);
5228 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5229 symtab_hdr->sh_type = SHT_SYMTAB;
5230 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5231 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5232 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5233 symtab_hdr->sh_addralign = bed->s->file_align;
5235 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5236 symstrtab_hdr->sh_type = SHT_STRTAB;
5238 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5239 outbound_syms = bfd_alloc (abfd, amt);
5240 if (outbound_syms == NULL)
5242 symtab_hdr->contents = (PTR) outbound_syms;
5244 outbound_shndx = NULL;
5245 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5246 if (symtab_shndx_hdr->sh_name != 0)
5248 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5249 outbound_shndx = bfd_zalloc (abfd, amt);
5250 if (outbound_shndx == NULL)
5252 symtab_shndx_hdr->contents = outbound_shndx;
5253 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5254 symtab_shndx_hdr->sh_size = amt;
5255 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5256 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5259 /* now generate the data (for "contents") */
5261 /* Fill in zeroth symbol and swap it out. */
5262 Elf_Internal_Sym sym;
5268 sym.st_shndx = SHN_UNDEF;
5269 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5270 outbound_syms += bed->s->sizeof_sym;
5271 if (outbound_shndx != NULL)
5272 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5275 syms = bfd_get_outsymbols (abfd);
5276 for (idx = 0; idx < symcount; idx++)
5278 Elf_Internal_Sym sym;
5279 bfd_vma value = syms[idx]->value;
5280 elf_symbol_type *type_ptr;
5281 flagword flags = syms[idx]->flags;
5284 if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5286 /* Local section symbols have no name. */
5291 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5294 if (sym.st_name == (unsigned long) -1)
5298 type_ptr = elf_symbol_from (abfd, syms[idx]);
5300 if ((flags & BSF_SECTION_SYM) == 0
5301 && bfd_is_com_section (syms[idx]->section))
5303 /* ELF common symbols put the alignment into the `value' field,
5304 and the size into the `size' field. This is backwards from
5305 how BFD handles it, so reverse it here. */
5306 sym.st_size = value;
5307 if (type_ptr == NULL
5308 || type_ptr->internal_elf_sym.st_value == 0)
5309 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5311 sym.st_value = type_ptr->internal_elf_sym.st_value;
5312 sym.st_shndx = _bfd_elf_section_from_bfd_section
5313 (abfd, syms[idx]->section);
5317 asection *sec = syms[idx]->section;
5320 if (sec->output_section)
5322 value += sec->output_offset;
5323 sec = sec->output_section;
5325 /* Don't add in the section vma for relocatable output. */
5326 if (! relocatable_p)
5328 sym.st_value = value;
5329 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5331 if (bfd_is_abs_section (sec)
5333 && type_ptr->internal_elf_sym.st_shndx != 0)
5335 /* This symbol is in a real ELF section which we did
5336 not create as a BFD section. Undo the mapping done
5337 by copy_private_symbol_data. */
5338 shndx = type_ptr->internal_elf_sym.st_shndx;
5342 shndx = elf_onesymtab (abfd);
5345 shndx = elf_dynsymtab (abfd);
5348 shndx = elf_tdata (abfd)->strtab_section;
5351 shndx = elf_tdata (abfd)->shstrtab_section;
5354 shndx = elf_tdata (abfd)->symtab_shndx_section;
5362 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5368 /* Writing this would be a hell of a lot easier if
5369 we had some decent documentation on bfd, and
5370 knew what to expect of the library, and what to
5371 demand of applications. For example, it
5372 appears that `objcopy' might not set the
5373 section of a symbol to be a section that is
5374 actually in the output file. */
5375 sec2 = bfd_get_section_by_name (abfd, sec->name);
5376 BFD_ASSERT (sec2 != 0);
5377 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5378 BFD_ASSERT (shndx != -1);
5382 sym.st_shndx = shndx;
5385 if ((flags & BSF_THREAD_LOCAL) != 0)
5387 else if ((flags & BSF_FUNCTION) != 0)
5389 else if ((flags & BSF_OBJECT) != 0)
5394 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5397 /* Processor-specific types */
5398 if (type_ptr != NULL
5399 && bed->elf_backend_get_symbol_type)
5400 type = ((*bed->elf_backend_get_symbol_type)
5401 (&type_ptr->internal_elf_sym, type));
5403 if (flags & BSF_SECTION_SYM)
5405 if (flags & BSF_GLOBAL)
5406 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5408 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5410 else if (bfd_is_com_section (syms[idx]->section))
5411 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5412 else if (bfd_is_und_section (syms[idx]->section))
5413 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5417 else if (flags & BSF_FILE)
5418 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5421 int bind = STB_LOCAL;
5423 if (flags & BSF_LOCAL)
5425 else if (flags & BSF_WEAK)
5427 else if (flags & BSF_GLOBAL)
5430 sym.st_info = ELF_ST_INFO (bind, type);
5433 if (type_ptr != NULL)
5434 sym.st_other = type_ptr->internal_elf_sym.st_other;
5438 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5439 outbound_syms += bed->s->sizeof_sym;
5440 if (outbound_shndx != NULL)
5441 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5445 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5446 symstrtab_hdr->sh_type = SHT_STRTAB;
5448 symstrtab_hdr->sh_flags = 0;
5449 symstrtab_hdr->sh_addr = 0;
5450 symstrtab_hdr->sh_entsize = 0;
5451 symstrtab_hdr->sh_link = 0;
5452 symstrtab_hdr->sh_info = 0;
5453 symstrtab_hdr->sh_addralign = 1;
5458 /* Return the number of bytes required to hold the symtab vector.
5460 Note that we base it on the count plus 1, since we will null terminate
5461 the vector allocated based on this size. However, the ELF symbol table
5462 always has a dummy entry as symbol #0, so it ends up even. */
5465 _bfd_elf_get_symtab_upper_bound (abfd)
5470 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5472 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5473 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5475 symtab_size -= sizeof (asymbol *);
5481 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
5486 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5488 if (elf_dynsymtab (abfd) == 0)
5490 bfd_set_error (bfd_error_invalid_operation);
5494 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5495 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5497 symtab_size -= sizeof (asymbol *);
5503 _bfd_elf_get_reloc_upper_bound (abfd, asect)
5504 bfd *abfd ATTRIBUTE_UNUSED;
5507 return (asect->reloc_count + 1) * sizeof (arelent *);
5510 /* Canonicalize the relocs. */
5513 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
5521 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5523 if (! bed->s->slurp_reloc_table (abfd, section, symbols, false))
5526 tblptr = section->relocation;
5527 for (i = 0; i < section->reloc_count; i++)
5528 *relptr++ = tblptr++;
5532 return section->reloc_count;
5536 _bfd_elf_get_symtab (abfd, alocation)
5538 asymbol **alocation;
5540 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5541 long symcount = bed->s->slurp_symbol_table (abfd, alocation, false);
5544 bfd_get_symcount (abfd) = symcount;
5549 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
5551 asymbol **alocation;
5553 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5554 return bed->s->slurp_symbol_table (abfd, alocation, true);
5557 /* Return the size required for the dynamic reloc entries. Any
5558 section that was actually installed in the BFD, and has type
5559 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5560 considered to be a dynamic reloc section. */
5563 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
5569 if (elf_dynsymtab (abfd) == 0)
5571 bfd_set_error (bfd_error_invalid_operation);
5575 ret = sizeof (arelent *);
5576 for (s = abfd->sections; s != NULL; s = s->next)
5577 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5578 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5579 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5580 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5581 * sizeof (arelent *));
5586 /* Canonicalize the dynamic relocation entries. Note that we return
5587 the dynamic relocations as a single block, although they are
5588 actually associated with particular sections; the interface, which
5589 was designed for SunOS style shared libraries, expects that there
5590 is only one set of dynamic relocs. Any section that was actually
5591 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5592 the dynamic symbol table, is considered to be a dynamic reloc
5596 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
5601 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
5605 if (elf_dynsymtab (abfd) == 0)
5607 bfd_set_error (bfd_error_invalid_operation);
5611 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5613 for (s = abfd->sections; s != NULL; s = s->next)
5615 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5616 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5617 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5622 if (! (*slurp_relocs) (abfd, s, syms, true))
5624 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5626 for (i = 0; i < count; i++)
5637 /* Read in the version information. */
5640 _bfd_elf_slurp_version_tables (abfd)
5643 bfd_byte *contents = NULL;
5646 if (elf_dynverdef (abfd) != 0)
5648 Elf_Internal_Shdr *hdr;
5649 Elf_External_Verdef *everdef;
5650 Elf_Internal_Verdef *iverdef;
5651 Elf_Internal_Verdef *iverdefarr;
5652 Elf_Internal_Verdef iverdefmem;
5654 unsigned int maxidx;
5656 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5658 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5659 if (contents == NULL)
5661 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5662 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5665 /* We know the number of entries in the section but not the maximum
5666 index. Therefore we have to run through all entries and find
5668 everdef = (Elf_External_Verdef *) contents;
5670 for (i = 0; i < hdr->sh_info; ++i)
5672 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5674 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5675 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5677 everdef = ((Elf_External_Verdef *)
5678 ((bfd_byte *) everdef + iverdefmem.vd_next));
5681 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5682 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
5683 if (elf_tdata (abfd)->verdef == NULL)
5686 elf_tdata (abfd)->cverdefs = maxidx;
5688 everdef = (Elf_External_Verdef *) contents;
5689 iverdefarr = elf_tdata (abfd)->verdef;
5690 for (i = 0; i < hdr->sh_info; i++)
5692 Elf_External_Verdaux *everdaux;
5693 Elf_Internal_Verdaux *iverdaux;
5696 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5698 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5699 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5701 iverdef->vd_bfd = abfd;
5703 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5704 iverdef->vd_auxptr = (Elf_Internal_Verdaux *) bfd_alloc (abfd, amt);
5705 if (iverdef->vd_auxptr == NULL)
5708 everdaux = ((Elf_External_Verdaux *)
5709 ((bfd_byte *) everdef + iverdef->vd_aux));
5710 iverdaux = iverdef->vd_auxptr;
5711 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5713 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5715 iverdaux->vda_nodename =
5716 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5717 iverdaux->vda_name);
5718 if (iverdaux->vda_nodename == NULL)
5721 if (j + 1 < iverdef->vd_cnt)
5722 iverdaux->vda_nextptr = iverdaux + 1;
5724 iverdaux->vda_nextptr = NULL;
5726 everdaux = ((Elf_External_Verdaux *)
5727 ((bfd_byte *) everdaux + iverdaux->vda_next));
5730 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5732 if (i + 1 < hdr->sh_info)
5733 iverdef->vd_nextdef = iverdef + 1;
5735 iverdef->vd_nextdef = NULL;
5737 everdef = ((Elf_External_Verdef *)
5738 ((bfd_byte *) everdef + iverdef->vd_next));
5745 if (elf_dynverref (abfd) != 0)
5747 Elf_Internal_Shdr *hdr;
5748 Elf_External_Verneed *everneed;
5749 Elf_Internal_Verneed *iverneed;
5752 hdr = &elf_tdata (abfd)->dynverref_hdr;
5754 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5755 elf_tdata (abfd)->verref =
5756 (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt);
5757 if (elf_tdata (abfd)->verref == NULL)
5760 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5762 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5763 if (contents == NULL)
5765 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5766 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5769 everneed = (Elf_External_Verneed *) contents;
5770 iverneed = elf_tdata (abfd)->verref;
5771 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5773 Elf_External_Vernaux *evernaux;
5774 Elf_Internal_Vernaux *ivernaux;
5777 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5779 iverneed->vn_bfd = abfd;
5781 iverneed->vn_filename =
5782 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5784 if (iverneed->vn_filename == NULL)
5787 amt = iverneed->vn_cnt;
5788 amt *= sizeof (Elf_Internal_Vernaux);
5789 iverneed->vn_auxptr = (Elf_Internal_Vernaux *) bfd_alloc (abfd, amt);
5791 evernaux = ((Elf_External_Vernaux *)
5792 ((bfd_byte *) everneed + iverneed->vn_aux));
5793 ivernaux = iverneed->vn_auxptr;
5794 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5796 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5798 ivernaux->vna_nodename =
5799 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5800 ivernaux->vna_name);
5801 if (ivernaux->vna_nodename == NULL)
5804 if (j + 1 < iverneed->vn_cnt)
5805 ivernaux->vna_nextptr = ivernaux + 1;
5807 ivernaux->vna_nextptr = NULL;
5809 evernaux = ((Elf_External_Vernaux *)
5810 ((bfd_byte *) evernaux + ivernaux->vna_next));
5813 if (i + 1 < hdr->sh_info)
5814 iverneed->vn_nextref = iverneed + 1;
5816 iverneed->vn_nextref = NULL;
5818 everneed = ((Elf_External_Verneed *)
5819 ((bfd_byte *) everneed + iverneed->vn_next));
5829 if (contents == NULL)
5835 _bfd_elf_make_empty_symbol (abfd)
5838 elf_symbol_type *newsym;
5839 bfd_size_type amt = sizeof (elf_symbol_type);
5841 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
5846 newsym->symbol.the_bfd = abfd;
5847 return &newsym->symbol;
5852 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
5853 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5857 bfd_symbol_info (symbol, ret);
5860 /* Return whether a symbol name implies a local symbol. Most targets
5861 use this function for the is_local_label_name entry point, but some
5865 _bfd_elf_is_local_label_name (abfd, name)
5866 bfd *abfd ATTRIBUTE_UNUSED;
5869 /* Normal local symbols start with ``.L''. */
5870 if (name[0] == '.' && name[1] == 'L')
5873 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5874 DWARF debugging symbols starting with ``..''. */
5875 if (name[0] == '.' && name[1] == '.')
5878 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5879 emitting DWARF debugging output. I suspect this is actually a
5880 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5881 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5882 underscore to be emitted on some ELF targets). For ease of use,
5883 we treat such symbols as local. */
5884 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
5891 _bfd_elf_get_lineno (ignore_abfd, symbol)
5892 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5893 asymbol *symbol ATTRIBUTE_UNUSED;
5900 _bfd_elf_set_arch_mach (abfd, arch, machine)
5902 enum bfd_architecture arch;
5903 unsigned long machine;
5905 /* If this isn't the right architecture for this backend, and this
5906 isn't the generic backend, fail. */
5907 if (arch != get_elf_backend_data (abfd)->arch
5908 && arch != bfd_arch_unknown
5909 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
5912 return bfd_default_set_arch_mach (abfd, arch, machine);
5915 /* Find the function to a particular section and offset,
5916 for error reporting. */
5919 elf_find_function (abfd, section, symbols, offset,
5920 filename_ptr, functionname_ptr)
5921 bfd *abfd ATTRIBUTE_UNUSED;
5925 const char **filename_ptr;
5926 const char **functionname_ptr;
5928 const char *filename;
5937 for (p = symbols; *p != NULL; p++)
5941 q = (elf_symbol_type *) *p;
5943 if (bfd_get_section (&q->symbol) != section)
5946 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5951 filename = bfd_asymbol_name (&q->symbol);
5955 if (q->symbol.section == section
5956 && q->symbol.value >= low_func
5957 && q->symbol.value <= offset)
5959 func = (asymbol *) q;
5960 low_func = q->symbol.value;
5970 *filename_ptr = filename;
5971 if (functionname_ptr)
5972 *functionname_ptr = bfd_asymbol_name (func);
5977 /* Find the nearest line to a particular section and offset,
5978 for error reporting. */
5981 _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
5982 filename_ptr, functionname_ptr, line_ptr)
5987 const char **filename_ptr;
5988 const char **functionname_ptr;
5989 unsigned int *line_ptr;
5993 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
5994 filename_ptr, functionname_ptr,
5997 if (!*functionname_ptr)
5998 elf_find_function (abfd, section, symbols, offset,
5999 *filename_ptr ? NULL : filename_ptr,
6005 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6006 filename_ptr, functionname_ptr,
6008 &elf_tdata (abfd)->dwarf2_find_line_info))
6010 if (!*functionname_ptr)
6011 elf_find_function (abfd, section, symbols, offset,
6012 *filename_ptr ? NULL : filename_ptr,
6018 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6019 &found, filename_ptr,
6020 functionname_ptr, line_ptr,
6021 &elf_tdata (abfd)->line_info))
6026 if (symbols == NULL)
6029 if (! elf_find_function (abfd, section, symbols, offset,
6030 filename_ptr, functionname_ptr))
6038 _bfd_elf_sizeof_headers (abfd, reloc)
6044 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6046 ret += get_program_header_size (abfd);
6051 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
6056 bfd_size_type count;
6058 Elf_Internal_Shdr *hdr;
6061 if (! abfd->output_has_begun
6062 && ! (_bfd_elf_compute_section_file_positions
6063 (abfd, (struct bfd_link_info *) NULL)))
6066 hdr = &elf_section_data (section)->this_hdr;
6067 pos = hdr->sh_offset + offset;
6068 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6069 || bfd_bwrite (location, count, abfd) != count)
6076 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
6077 bfd *abfd ATTRIBUTE_UNUSED;
6078 arelent *cache_ptr ATTRIBUTE_UNUSED;
6079 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
6086 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
6089 Elf_Internal_Rel *dst;
6095 /* Try to convert a non-ELF reloc into an ELF one. */
6098 _bfd_elf_validate_reloc (abfd, areloc)
6102 /* Check whether we really have an ELF howto. */
6104 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6106 bfd_reloc_code_real_type code;
6107 reloc_howto_type *howto;
6109 /* Alien reloc: Try to determine its type to replace it with an
6110 equivalent ELF reloc. */
6112 if (areloc->howto->pc_relative)
6114 switch (areloc->howto->bitsize)
6117 code = BFD_RELOC_8_PCREL;
6120 code = BFD_RELOC_12_PCREL;
6123 code = BFD_RELOC_16_PCREL;
6126 code = BFD_RELOC_24_PCREL;
6129 code = BFD_RELOC_32_PCREL;
6132 code = BFD_RELOC_64_PCREL;
6138 howto = bfd_reloc_type_lookup (abfd, code);
6140 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6142 if (howto->pcrel_offset)
6143 areloc->addend += areloc->address;
6145 areloc->addend -= areloc->address; /* addend is unsigned!! */
6150 switch (areloc->howto->bitsize)
6156 code = BFD_RELOC_14;
6159 code = BFD_RELOC_16;
6162 code = BFD_RELOC_26;
6165 code = BFD_RELOC_32;
6168 code = BFD_RELOC_64;
6174 howto = bfd_reloc_type_lookup (abfd, code);
6178 areloc->howto = howto;
6186 (*_bfd_error_handler)
6187 (_("%s: unsupported relocation type %s"),
6188 bfd_archive_filename (abfd), areloc->howto->name);
6189 bfd_set_error (bfd_error_bad_value);
6194 _bfd_elf_close_and_cleanup (abfd)
6197 if (bfd_get_format (abfd) == bfd_object)
6199 if (elf_shstrtab (abfd) != NULL)
6200 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6203 return _bfd_generic_close_and_cleanup (abfd);
6206 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6207 in the relocation's offset. Thus we cannot allow any sort of sanity
6208 range-checking to interfere. There is nothing else to do in processing
6211 bfd_reloc_status_type
6212 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
6213 bfd *abfd ATTRIBUTE_UNUSED;
6214 arelent *re ATTRIBUTE_UNUSED;
6215 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
6216 PTR data ATTRIBUTE_UNUSED;
6217 asection *is ATTRIBUTE_UNUSED;
6218 bfd *obfd ATTRIBUTE_UNUSED;
6219 char **errmsg ATTRIBUTE_UNUSED;
6221 return bfd_reloc_ok;
6224 /* Elf core file support. Much of this only works on native
6225 toolchains, since we rely on knowing the
6226 machine-dependent procfs structure in order to pick
6227 out details about the corefile. */
6229 #ifdef HAVE_SYS_PROCFS_H
6230 # include <sys/procfs.h>
6233 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6236 elfcore_make_pid (abfd)
6239 return ((elf_tdata (abfd)->core_lwpid << 16)
6240 + (elf_tdata (abfd)->core_pid));
6243 /* If there isn't a section called NAME, make one, using
6244 data from SECT. Note, this function will generate a
6245 reference to NAME, so you shouldn't deallocate or
6249 elfcore_maybe_make_sect (abfd, name, sect)
6256 if (bfd_get_section_by_name (abfd, name) != NULL)
6259 sect2 = bfd_make_section (abfd, name);
6263 sect2->_raw_size = sect->_raw_size;
6264 sect2->filepos = sect->filepos;
6265 sect2->flags = sect->flags;
6266 sect2->alignment_power = sect->alignment_power;
6270 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6271 actually creates up to two pseudosections:
6272 - For the single-threaded case, a section named NAME, unless
6273 such a section already exists.
6274 - For the multi-threaded case, a section named "NAME/PID", where
6275 PID is elfcore_make_pid (abfd).
6276 Both pseudosections have identical contents. */
6278 _bfd_elfcore_make_pseudosection (abfd, name, size, filepos)
6285 char *threaded_name;
6289 /* Build the section name. */
6291 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6292 len = strlen (buf) + 1;
6293 threaded_name = bfd_alloc (abfd, (bfd_size_type) len);
6294 if (threaded_name == NULL)
6296 memcpy (threaded_name, buf, len);
6298 sect = bfd_make_section (abfd, threaded_name);
6301 sect->_raw_size = size;
6302 sect->filepos = filepos;
6303 sect->flags = SEC_HAS_CONTENTS;
6304 sect->alignment_power = 2;
6306 return elfcore_maybe_make_sect (abfd, name, sect);
6309 /* prstatus_t exists on:
6311 linux 2.[01] + glibc
6315 #if defined (HAVE_PRSTATUS_T)
6316 static boolean elfcore_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *));
6319 elfcore_grok_prstatus (abfd, note)
6321 Elf_Internal_Note *note;
6326 if (note->descsz == sizeof (prstatus_t))
6330 raw_size = sizeof (prstat.pr_reg);
6331 offset = offsetof (prstatus_t, pr_reg);
6332 memcpy (&prstat, note->descdata, sizeof (prstat));
6334 /* Do not overwrite the core signal if it
6335 has already been set by another thread. */
6336 if (elf_tdata (abfd)->core_signal == 0)
6337 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6338 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6340 /* pr_who exists on:
6343 pr_who doesn't exist on:
6346 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6347 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6350 #if defined (HAVE_PRSTATUS32_T)
6351 else if (note->descsz == sizeof (prstatus32_t))
6353 /* 64-bit host, 32-bit corefile */
6354 prstatus32_t prstat;
6356 raw_size = sizeof (prstat.pr_reg);
6357 offset = offsetof (prstatus32_t, pr_reg);
6358 memcpy (&prstat, note->descdata, sizeof (prstat));
6360 /* Do not overwrite the core signal if it
6361 has already been set by another thread. */
6362 if (elf_tdata (abfd)->core_signal == 0)
6363 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6364 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6366 /* pr_who exists on:
6369 pr_who doesn't exist on:
6372 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6373 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6376 #endif /* HAVE_PRSTATUS32_T */
6379 /* Fail - we don't know how to handle any other
6380 note size (ie. data object type). */
6384 /* Make a ".reg/999" section and a ".reg" section. */
6385 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6386 raw_size, note->descpos + offset);
6388 #endif /* defined (HAVE_PRSTATUS_T) */
6390 /* Create a pseudosection containing the exact contents of NOTE. */
6392 elfcore_make_note_pseudosection (abfd, name, note)
6395 Elf_Internal_Note *note;
6397 return _bfd_elfcore_make_pseudosection (abfd, name,
6398 note->descsz, note->descpos);
6401 /* There isn't a consistent prfpregset_t across platforms,
6402 but it doesn't matter, because we don't have to pick this
6403 data structure apart. */
6406 elfcore_grok_prfpreg (abfd, note)
6408 Elf_Internal_Note *note;
6410 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6413 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6414 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6418 elfcore_grok_prxfpreg (abfd, note)
6420 Elf_Internal_Note *note;
6422 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6425 #if defined (HAVE_PRPSINFO_T)
6426 typedef prpsinfo_t elfcore_psinfo_t;
6427 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6428 typedef prpsinfo32_t elfcore_psinfo32_t;
6432 #if defined (HAVE_PSINFO_T)
6433 typedef psinfo_t elfcore_psinfo_t;
6434 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6435 typedef psinfo32_t elfcore_psinfo32_t;
6439 /* return a malloc'ed copy of a string at START which is at
6440 most MAX bytes long, possibly without a terminating '\0'.
6441 the copy will always have a terminating '\0'. */
6444 _bfd_elfcore_strndup (abfd, start, max)
6450 char *end = memchr (start, '\0', max);
6458 dups = bfd_alloc (abfd, (bfd_size_type) len + 1);
6462 memcpy (dups, start, len);
6468 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6469 static boolean elfcore_grok_psinfo PARAMS ((bfd *, Elf_Internal_Note *));
6472 elfcore_grok_psinfo (abfd, note)
6474 Elf_Internal_Note *note;
6476 if (note->descsz == sizeof (elfcore_psinfo_t))
6478 elfcore_psinfo_t psinfo;
6480 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6482 elf_tdata (abfd)->core_program
6483 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6484 sizeof (psinfo.pr_fname));
6486 elf_tdata (abfd)->core_command
6487 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6488 sizeof (psinfo.pr_psargs));
6490 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6491 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6493 /* 64-bit host, 32-bit corefile */
6494 elfcore_psinfo32_t psinfo;
6496 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6498 elf_tdata (abfd)->core_program
6499 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6500 sizeof (psinfo.pr_fname));
6502 elf_tdata (abfd)->core_command
6503 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6504 sizeof (psinfo.pr_psargs));
6510 /* Fail - we don't know how to handle any other
6511 note size (ie. data object type). */
6515 /* Note that for some reason, a spurious space is tacked
6516 onto the end of the args in some (at least one anyway)
6517 implementations, so strip it off if it exists. */
6520 char *command = elf_tdata (abfd)->core_command;
6521 int n = strlen (command);
6523 if (0 < n && command[n - 1] == ' ')
6524 command[n - 1] = '\0';
6529 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6531 #if defined (HAVE_PSTATUS_T)
6532 static boolean elfcore_grok_pstatus PARAMS ((bfd *, Elf_Internal_Note *));
6535 elfcore_grok_pstatus (abfd, note)
6537 Elf_Internal_Note *note;
6539 if (note->descsz == sizeof (pstatus_t)
6540 #if defined (HAVE_PXSTATUS_T)
6541 || note->descsz == sizeof (pxstatus_t)
6547 memcpy (&pstat, note->descdata, sizeof (pstat));
6549 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6551 #if defined (HAVE_PSTATUS32_T)
6552 else if (note->descsz == sizeof (pstatus32_t))
6554 /* 64-bit host, 32-bit corefile */
6557 memcpy (&pstat, note->descdata, sizeof (pstat));
6559 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6562 /* Could grab some more details from the "representative"
6563 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6564 NT_LWPSTATUS note, presumably. */
6568 #endif /* defined (HAVE_PSTATUS_T) */
6570 #if defined (HAVE_LWPSTATUS_T)
6571 static boolean elfcore_grok_lwpstatus PARAMS ((bfd *, Elf_Internal_Note *));
6574 elfcore_grok_lwpstatus (abfd, note)
6576 Elf_Internal_Note *note;
6578 lwpstatus_t lwpstat;
6584 if (note->descsz != sizeof (lwpstat)
6585 #if defined (HAVE_LWPXSTATUS_T)
6586 && note->descsz != sizeof (lwpxstatus_t)
6591 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6593 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6594 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6596 /* Make a ".reg/999" section. */
6598 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6599 len = strlen (buf) + 1;
6600 name = bfd_alloc (abfd, (bfd_size_type) len);
6603 memcpy (name, buf, len);
6605 sect = bfd_make_section (abfd, name);
6609 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6610 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6611 sect->filepos = note->descpos
6612 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6615 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6616 sect->_raw_size = sizeof (lwpstat.pr_reg);
6617 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6620 sect->flags = SEC_HAS_CONTENTS;
6621 sect->alignment_power = 2;
6623 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6626 /* Make a ".reg2/999" section */
6628 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6629 len = strlen (buf) + 1;
6630 name = bfd_alloc (abfd, (bfd_size_type) len);
6633 memcpy (name, buf, len);
6635 sect = bfd_make_section (abfd, name);
6639 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6640 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6641 sect->filepos = note->descpos
6642 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6645 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6646 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6647 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6650 sect->flags = SEC_HAS_CONTENTS;
6651 sect->alignment_power = 2;
6653 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6655 #endif /* defined (HAVE_LWPSTATUS_T) */
6657 #if defined (HAVE_WIN32_PSTATUS_T)
6659 elfcore_grok_win32pstatus (abfd, note)
6661 Elf_Internal_Note *note;
6667 win32_pstatus_t pstatus;
6669 if (note->descsz < sizeof (pstatus))
6672 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6674 switch (pstatus.data_type)
6676 case NOTE_INFO_PROCESS:
6677 /* FIXME: need to add ->core_command. */
6678 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6679 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6682 case NOTE_INFO_THREAD:
6683 /* Make a ".reg/999" section. */
6684 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6686 len = strlen (buf) + 1;
6687 name = bfd_alloc (abfd, (bfd_size_type) len);
6691 memcpy (name, buf, len);
6693 sect = bfd_make_section (abfd, name);
6697 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6698 sect->filepos = (note->descpos
6699 + offsetof (struct win32_pstatus,
6700 data.thread_info.thread_context));
6701 sect->flags = SEC_HAS_CONTENTS;
6702 sect->alignment_power = 2;
6704 if (pstatus.data.thread_info.is_active_thread)
6705 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6709 case NOTE_INFO_MODULE:
6710 /* Make a ".module/xxxxxxxx" section. */
6711 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6713 len = strlen (buf) + 1;
6714 name = bfd_alloc (abfd, (bfd_size_type) len);
6718 memcpy (name, buf, len);
6720 sect = bfd_make_section (abfd, name);
6725 sect->_raw_size = note->descsz;
6726 sect->filepos = note->descpos;
6727 sect->flags = SEC_HAS_CONTENTS;
6728 sect->alignment_power = 2;
6737 #endif /* HAVE_WIN32_PSTATUS_T */
6740 elfcore_grok_note (abfd, note)
6742 Elf_Internal_Note *note;
6744 struct elf_backend_data *bed = get_elf_backend_data (abfd);
6752 if (bed->elf_backend_grok_prstatus)
6753 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6755 #if defined (HAVE_PRSTATUS_T)
6756 return elfcore_grok_prstatus (abfd, note);
6761 #if defined (HAVE_PSTATUS_T)
6763 return elfcore_grok_pstatus (abfd, note);
6766 #if defined (HAVE_LWPSTATUS_T)
6768 return elfcore_grok_lwpstatus (abfd, note);
6771 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6772 return elfcore_grok_prfpreg (abfd, note);
6774 #if defined (HAVE_WIN32_PSTATUS_T)
6775 case NT_WIN32PSTATUS:
6776 return elfcore_grok_win32pstatus (abfd, note);
6779 case NT_PRXFPREG: /* Linux SSE extension */
6780 if (note->namesz == 5
6781 && ! strcmp (note->namedata, "LINUX"))
6782 return elfcore_grok_prxfpreg (abfd, note);
6788 if (bed->elf_backend_grok_psinfo)
6789 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6791 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6792 return elfcore_grok_psinfo (abfd, note);
6800 elfcore_netbsd_get_lwpid (note, lwpidp)
6801 Elf_Internal_Note *note;
6806 cp = strchr (note->namedata, '@');
6809 *lwpidp = atoi(cp + 1);
6816 elfcore_grok_netbsd_procinfo (abfd, note)
6818 Elf_Internal_Note *note;
6821 /* Signal number at offset 0x08. */
6822 elf_tdata (abfd)->core_signal
6823 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6825 /* Process ID at offset 0x50. */
6826 elf_tdata (abfd)->core_pid
6827 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6829 /* Command name at 0x7c (max 32 bytes, including nul). */
6830 elf_tdata (abfd)->core_command
6831 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6837 elfcore_grok_netbsd_note (abfd, note)
6839 Elf_Internal_Note *note;
6843 if (elfcore_netbsd_get_lwpid (note, &lwp))
6844 elf_tdata (abfd)->core_lwpid = lwp;
6846 if (note->type == NT_NETBSDCORE_PROCINFO)
6848 /* NetBSD-specific core "procinfo". Note that we expect to
6849 find this note before any of the others, which is fine,
6850 since the kernel writes this note out first when it
6851 creates a core file. */
6853 return elfcore_grok_netbsd_procinfo (abfd, note);
6856 /* As of Jan 2002 there are no other machine-independent notes
6857 defined for NetBSD core files. If the note type is less
6858 than the start of the machine-dependent note types, we don't
6861 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6865 switch (bfd_get_arch (abfd))
6867 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6868 PT_GETFPREGS == mach+2. */
6870 case bfd_arch_alpha:
6871 case bfd_arch_sparc:
6874 case NT_NETBSDCORE_FIRSTMACH+0:
6875 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6877 case NT_NETBSDCORE_FIRSTMACH+2:
6878 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6884 /* On all other arch's, PT_GETREGS == mach+1 and
6885 PT_GETFPREGS == mach+3. */
6890 case NT_NETBSDCORE_FIRSTMACH+1:
6891 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6893 case NT_NETBSDCORE_FIRSTMACH+3:
6894 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6903 /* Function: elfcore_write_note
6910 size of data for note
6913 End of buffer containing note. */
6916 elfcore_write_note (abfd, buf, bufsiz, name, type, input, size)
6925 Elf_External_Note *xnp;
6935 struct elf_backend_data *bed;
6937 namesz = strlen (name) + 1;
6938 bed = get_elf_backend_data (abfd);
6939 pad = -namesz & (bed->s->file_align - 1);
6942 newspace = sizeof (Elf_External_Note) - 1 + namesz + pad + size;
6944 p = realloc (buf, *bufsiz + newspace);
6946 *bufsiz += newspace;
6947 xnp = (Elf_External_Note *) dest;
6948 H_PUT_32 (abfd, namesz, xnp->namesz);
6949 H_PUT_32 (abfd, size, xnp->descsz);
6950 H_PUT_32 (abfd, type, xnp->type);
6954 memcpy (dest, name, namesz);
6962 memcpy (dest, input, size);
6966 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6968 elfcore_write_prpsinfo (abfd, buf, bufsiz, fname, psargs)
6976 char *note_name = "CORE";
6978 #if defined (HAVE_PSINFO_T)
6980 note_type = NT_PSINFO;
6983 note_type = NT_PRPSINFO;
6986 memset (&data, 0, sizeof (data));
6987 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
6988 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
6989 return elfcore_write_note (abfd, buf, bufsiz,
6990 note_name, note_type, &data, sizeof (data));
6992 #endif /* PSINFO_T or PRPSINFO_T */
6994 #if defined (HAVE_PRSTATUS_T)
6996 elfcore_write_prstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7005 char *note_name = "CORE";
7007 memset (&prstat, 0, sizeof (prstat));
7008 prstat.pr_pid = pid;
7009 prstat.pr_cursig = cursig;
7010 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7011 return elfcore_write_note (abfd, buf, bufsiz,
7012 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7014 #endif /* HAVE_PRSTATUS_T */
7016 #if defined (HAVE_LWPSTATUS_T)
7018 elfcore_write_lwpstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7026 lwpstatus_t lwpstat;
7027 char *note_name = "CORE";
7029 memset (&lwpstat, 0, sizeof (lwpstat));
7030 lwpstat.pr_lwpid = pid >> 16;
7031 lwpstat.pr_cursig = cursig;
7032 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7033 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7034 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7036 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7037 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7039 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7040 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7043 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7044 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7046 #endif /* HAVE_LWPSTATUS_T */
7048 #if defined (HAVE_PSTATUS_T)
7050 elfcore_write_pstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7059 char *note_name = "CORE";
7061 memset (&pstat, 0, sizeof (pstat));
7062 pstat.pr_pid = pid & 0xffff;
7063 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7064 NT_PSTATUS, &pstat, sizeof (pstat));
7067 #endif /* HAVE_PSTATUS_T */
7070 elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size)
7077 char *note_name = "CORE";
7078 return elfcore_write_note (abfd, buf, bufsiz,
7079 note_name, NT_FPREGSET, fpregs, size);
7083 elfcore_write_prxfpreg (abfd, buf, bufsiz, xfpregs, size)
7090 char *note_name = "LINUX";
7091 return elfcore_write_note (abfd, buf, bufsiz,
7092 note_name, NT_PRXFPREG, xfpregs, size);
7096 elfcore_read_notes (abfd, offset, size)
7107 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7110 buf = bfd_malloc (size);
7114 if (bfd_bread (buf, size, abfd) != size)
7122 while (p < buf + size)
7124 /* FIXME: bad alignment assumption. */
7125 Elf_External_Note *xnp = (Elf_External_Note *) p;
7126 Elf_Internal_Note in;
7128 in.type = H_GET_32 (abfd, xnp->type);
7130 in.namesz = H_GET_32 (abfd, xnp->namesz);
7131 in.namedata = xnp->name;
7133 in.descsz = H_GET_32 (abfd, xnp->descsz);
7134 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7135 in.descpos = offset + (in.descdata - buf);
7137 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7139 if (! elfcore_grok_netbsd_note (abfd, &in))
7144 if (! elfcore_grok_note (abfd, &in))
7148 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7155 /* Providing external access to the ELF program header table. */
7157 /* Return an upper bound on the number of bytes required to store a
7158 copy of ABFD's program header table entries. Return -1 if an error
7159 occurs; bfd_get_error will return an appropriate code. */
7162 bfd_get_elf_phdr_upper_bound (abfd)
7165 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7167 bfd_set_error (bfd_error_wrong_format);
7171 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7174 /* Copy ABFD's program header table entries to *PHDRS. The entries
7175 will be stored as an array of Elf_Internal_Phdr structures, as
7176 defined in include/elf/internal.h. To find out how large the
7177 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7179 Return the number of program header table entries read, or -1 if an
7180 error occurs; bfd_get_error will return an appropriate code. */
7183 bfd_get_elf_phdrs (abfd, phdrs)
7189 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7191 bfd_set_error (bfd_error_wrong_format);
7195 num_phdrs = elf_elfheader (abfd)->e_phnum;
7196 memcpy (phdrs, elf_tdata (abfd)->phdr,
7197 num_phdrs * sizeof (Elf_Internal_Phdr));
7203 _bfd_elf_sprintf_vma (abfd, buf, value)
7204 bfd *abfd ATTRIBUTE_UNUSED;
7209 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7211 i_ehdrp = elf_elfheader (abfd);
7212 if (i_ehdrp == NULL)
7213 sprintf_vma (buf, value);
7216 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7218 #if BFD_HOST_64BIT_LONG
7219 sprintf (buf, "%016lx", value);
7221 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7222 _bfd_int64_low (value));
7226 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7229 sprintf_vma (buf, value);
7234 _bfd_elf_fprintf_vma (abfd, stream, value)
7235 bfd *abfd ATTRIBUTE_UNUSED;
7240 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7242 i_ehdrp = elf_elfheader (abfd);
7243 if (i_ehdrp == NULL)
7244 fprintf_vma ((FILE *) stream, value);
7247 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7249 #if BFD_HOST_64BIT_LONG
7250 fprintf ((FILE *) stream, "%016lx", value);
7252 fprintf ((FILE *) stream, "%08lx%08lx",
7253 _bfd_int64_high (value), _bfd_int64_low (value));
7257 fprintf ((FILE *) stream, "%08lx",
7258 (unsigned long) (value & 0xffffffff));
7261 fprintf_vma ((FILE *) stream, value);
7265 enum elf_reloc_type_class
7266 _bfd_elf_reloc_type_class (rela)
7267 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED;
7269 return reloc_class_normal;
7272 /* For RELA architectures, return the relocation value for a
7273 relocation against a local symbol. */
7276 _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
7278 Elf_Internal_Sym *sym;
7280 Elf_Internal_Rela *rel;
7284 relocation = (sec->output_section->vma
7285 + sec->output_offset
7287 if ((sec->flags & SEC_MERGE)
7288 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7289 && elf_section_data (sec)->sec_info_type == ELF_INFO_TYPE_MERGE)
7295 _bfd_merged_section_offset (abfd, &msec,
7296 elf_section_data (sec)->sec_info,
7297 sym->st_value + rel->r_addend,
7300 rel->r_addend += msec->output_section->vma + msec->output_offset;
7306 _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
7308 Elf_Internal_Sym *sym;
7312 asection *sec = *psec;
7314 if (elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE)
7315 return sym->st_value + addend;
7317 return _bfd_merged_section_offset (abfd, psec,
7318 elf_section_data (sec)->sec_info,
7319 sym->st_value + addend, (bfd_vma) 0);
7323 _bfd_elf_section_offset (abfd, info, sec, offset)
7325 struct bfd_link_info *info;
7329 struct bfd_elf_section_data *sec_data;
7331 sec_data = elf_section_data (sec);
7332 switch (sec_data->sec_info_type)
7334 case ELF_INFO_TYPE_STABS:
7335 return _bfd_stab_section_offset
7336 (abfd, &elf_hash_table (info)->merge_info, sec, &sec_data->sec_info,
7338 case ELF_INFO_TYPE_EH_FRAME:
7339 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);