1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003 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, bfd_boolean));
45 static bfd_boolean map_sections_to_segments
47 static int elf_sort_sections
48 PARAMS ((const PTR, const PTR));
49 static bfd_boolean assign_file_positions_for_segments
51 static bfd_boolean assign_file_positions_except_relocs
53 static bfd_boolean prep_headers
55 static bfd_boolean swap_out_syms
56 PARAMS ((bfd *, struct bfd_strtab_hash **, int));
57 static bfd_boolean copy_private_bfd_data
58 PARAMS ((bfd *, bfd *));
60 PARAMS ((bfd *, file_ptr, bfd_size_type));
61 static const char *group_signature
62 PARAMS ((bfd *, Elf_Internal_Shdr *));
63 static bfd_boolean setup_group
64 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
65 static void merge_sections_remove_hook
66 PARAMS ((bfd *, asection *));
67 static void elf_fake_sections
68 PARAMS ((bfd *, asection *, PTR));
69 static bfd_boolean assign_section_numbers
71 static INLINE int sym_is_global
72 PARAMS ((bfd *, asymbol *));
73 static bfd_boolean elf_map_symbols
75 static bfd_size_type get_program_header_size
77 static bfd_boolean elfcore_read_notes
78 PARAMS ((bfd *, file_ptr, bfd_size_type));
79 static bfd_boolean elf_find_function
80 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
82 static int elfcore_make_pid
84 static bfd_boolean elfcore_maybe_make_sect
85 PARAMS ((bfd *, char *, asection *));
86 static bfd_boolean elfcore_make_note_pseudosection
87 PARAMS ((bfd *, char *, Elf_Internal_Note *));
88 static bfd_boolean elfcore_grok_prfpreg
89 PARAMS ((bfd *, Elf_Internal_Note *));
90 static bfd_boolean elfcore_grok_prxfpreg
91 PARAMS ((bfd *, Elf_Internal_Note *));
92 static bfd_boolean elfcore_grok_note
93 PARAMS ((bfd *, Elf_Internal_Note *));
94 static bfd_boolean elfcore_netbsd_get_lwpid
95 PARAMS ((Elf_Internal_Note *, int *));
96 static bfd_boolean elfcore_grok_netbsd_procinfo
97 PARAMS ((bfd *, Elf_Internal_Note *));
98 static bfd_boolean elfcore_grok_netbsd_note
99 PARAMS ((bfd *, Elf_Internal_Note *));
100 static bfd_boolean elfcore_grok_nto_gregs
101 PARAMS ((bfd *, Elf_Internal_Note *, pid_t));
102 static bfd_boolean elfcore_grok_nto_status
103 PARAMS ((bfd *, Elf_Internal_Note *, pid_t *));
104 static bfd_boolean elfcore_grok_nto_note
105 PARAMS ((bfd *, Elf_Internal_Note *));
107 /* Swap version information in and out. The version information is
108 currently size independent. If that ever changes, this code will
109 need to move into elfcode.h. */
111 /* Swap in a Verdef structure. */
114 _bfd_elf_swap_verdef_in (abfd, src, dst)
116 const Elf_External_Verdef *src;
117 Elf_Internal_Verdef *dst;
119 dst->vd_version = H_GET_16 (abfd, src->vd_version);
120 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
121 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
122 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
123 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
124 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
125 dst->vd_next = H_GET_32 (abfd, src->vd_next);
128 /* Swap out a Verdef structure. */
131 _bfd_elf_swap_verdef_out (abfd, src, dst)
133 const Elf_Internal_Verdef *src;
134 Elf_External_Verdef *dst;
136 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
137 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
138 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
139 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
140 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
141 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
142 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
145 /* Swap in a Verdaux structure. */
148 _bfd_elf_swap_verdaux_in (abfd, src, dst)
150 const Elf_External_Verdaux *src;
151 Elf_Internal_Verdaux *dst;
153 dst->vda_name = H_GET_32 (abfd, src->vda_name);
154 dst->vda_next = H_GET_32 (abfd, src->vda_next);
157 /* Swap out a Verdaux structure. */
160 _bfd_elf_swap_verdaux_out (abfd, src, dst)
162 const Elf_Internal_Verdaux *src;
163 Elf_External_Verdaux *dst;
165 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
166 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
169 /* Swap in a Verneed structure. */
172 _bfd_elf_swap_verneed_in (abfd, src, dst)
174 const Elf_External_Verneed *src;
175 Elf_Internal_Verneed *dst;
177 dst->vn_version = H_GET_16 (abfd, src->vn_version);
178 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
179 dst->vn_file = H_GET_32 (abfd, src->vn_file);
180 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
181 dst->vn_next = H_GET_32 (abfd, src->vn_next);
184 /* Swap out a Verneed structure. */
187 _bfd_elf_swap_verneed_out (abfd, src, dst)
189 const Elf_Internal_Verneed *src;
190 Elf_External_Verneed *dst;
192 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
193 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
194 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
195 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
196 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
199 /* Swap in a Vernaux structure. */
202 _bfd_elf_swap_vernaux_in (abfd, src, dst)
204 const Elf_External_Vernaux *src;
205 Elf_Internal_Vernaux *dst;
207 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
208 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
209 dst->vna_other = H_GET_16 (abfd, src->vna_other);
210 dst->vna_name = H_GET_32 (abfd, src->vna_name);
211 dst->vna_next = H_GET_32 (abfd, src->vna_next);
214 /* Swap out a Vernaux structure. */
217 _bfd_elf_swap_vernaux_out (abfd, src, dst)
219 const Elf_Internal_Vernaux *src;
220 Elf_External_Vernaux *dst;
222 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
223 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
224 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
225 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
226 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
229 /* Swap in a Versym structure. */
232 _bfd_elf_swap_versym_in (abfd, src, dst)
234 const Elf_External_Versym *src;
235 Elf_Internal_Versym *dst;
237 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
240 /* Swap out a Versym structure. */
243 _bfd_elf_swap_versym_out (abfd, src, dst)
245 const Elf_Internal_Versym *src;
246 Elf_External_Versym *dst;
248 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
251 /* Standard ELF hash function. Do not change this function; you will
252 cause invalid hash tables to be generated. */
255 bfd_elf_hash (namearg)
258 const unsigned char *name = (const unsigned char *) namearg;
263 while ((ch = *name++) != '\0')
266 if ((g = (h & 0xf0000000)) != 0)
269 /* The ELF ABI says `h &= ~g', but this is equivalent in
270 this case and on some machines one insn instead of two. */
274 return h & 0xffffffff;
277 /* Read a specified number of bytes at a specified offset in an ELF
278 file, into a newly allocated buffer, and return a pointer to the
282 elf_read (abfd, offset, size)
289 if ((buf = bfd_alloc (abfd, size)) == NULL)
291 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
293 if (bfd_bread ((PTR) buf, size, abfd) != size)
295 if (bfd_get_error () != bfd_error_system_call)
296 bfd_set_error (bfd_error_file_truncated);
303 bfd_elf_mkobject (abfd)
306 /* This just does initialization. */
307 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
308 bfd_size_type amt = sizeof (struct elf_obj_tdata);
309 elf_tdata (abfd) = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
310 if (elf_tdata (abfd) == 0)
312 /* Since everything is done at close time, do we need any
319 bfd_elf_mkcorefile (abfd)
322 /* I think this can be done just like an object file. */
323 return bfd_elf_mkobject (abfd);
327 bfd_elf_get_str_section (abfd, shindex)
329 unsigned int shindex;
331 Elf_Internal_Shdr **i_shdrp;
332 char *shstrtab = NULL;
334 bfd_size_type shstrtabsize;
336 i_shdrp = elf_elfsections (abfd);
337 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
340 shstrtab = (char *) i_shdrp[shindex]->contents;
341 if (shstrtab == NULL)
343 /* No cached one, attempt to read, and cache what we read. */
344 offset = i_shdrp[shindex]->sh_offset;
345 shstrtabsize = i_shdrp[shindex]->sh_size;
346 shstrtab = elf_read (abfd, offset, shstrtabsize);
347 i_shdrp[shindex]->contents = (PTR) shstrtab;
353 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
355 unsigned int shindex;
356 unsigned int strindex;
358 Elf_Internal_Shdr *hdr;
363 hdr = elf_elfsections (abfd)[shindex];
365 if (hdr->contents == NULL
366 && bfd_elf_get_str_section (abfd, shindex) == NULL)
369 if (strindex >= hdr->sh_size)
371 (*_bfd_error_handler)
372 (_("%s: invalid string offset %u >= %lu for section `%s'"),
373 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
374 ((shindex == elf_elfheader(abfd)->e_shstrndx
375 && strindex == hdr->sh_name)
377 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
381 return ((char *) hdr->contents) + strindex;
384 /* Read and convert symbols to internal format.
385 SYMCOUNT specifies the number of symbols to read, starting from
386 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
387 are non-NULL, they are used to store the internal symbols, external
388 symbols, and symbol section index extensions, respectively. */
391 bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, symoffset,
392 intsym_buf, extsym_buf, extshndx_buf)
394 Elf_Internal_Shdr *symtab_hdr;
397 Elf_Internal_Sym *intsym_buf;
399 Elf_External_Sym_Shndx *extshndx_buf;
401 Elf_Internal_Shdr *shndx_hdr;
403 const bfd_byte *esym;
404 Elf_External_Sym_Shndx *alloc_extshndx;
405 Elf_External_Sym_Shndx *shndx;
406 Elf_Internal_Sym *isym;
407 Elf_Internal_Sym *isymend;
408 struct elf_backend_data *bed;
416 /* Normal syms might have section extension entries. */
418 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
419 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
421 /* Read the symbols. */
423 alloc_extshndx = NULL;
424 bed = get_elf_backend_data (ibfd);
425 extsym_size = bed->s->sizeof_sym;
426 amt = symcount * extsym_size;
427 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
428 if (extsym_buf == NULL)
430 alloc_ext = bfd_malloc (amt);
431 extsym_buf = alloc_ext;
433 if (extsym_buf == NULL
434 || bfd_seek (ibfd, pos, SEEK_SET) != 0
435 || bfd_bread (extsym_buf, amt, ibfd) != amt)
441 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
445 amt = symcount * sizeof (Elf_External_Sym_Shndx);
446 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
447 if (extshndx_buf == NULL)
449 alloc_extshndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
450 extshndx_buf = alloc_extshndx;
452 if (extshndx_buf == NULL
453 || bfd_seek (ibfd, pos, SEEK_SET) != 0
454 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
461 if (intsym_buf == NULL)
463 bfd_size_type amt = symcount * sizeof (Elf_Internal_Sym);
464 intsym_buf = (Elf_Internal_Sym *) bfd_malloc (amt);
465 if (intsym_buf == NULL)
469 /* Convert the symbols to internal form. */
470 isymend = intsym_buf + symcount;
471 for (esym = extsym_buf, isym = intsym_buf, shndx = extshndx_buf;
473 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
474 (*bed->s->swap_symbol_in) (ibfd, esym, (const PTR) shndx, isym);
477 if (alloc_ext != NULL)
479 if (alloc_extshndx != NULL)
480 free (alloc_extshndx);
485 /* Look up a symbol name. */
487 bfd_elf_local_sym_name (abfd, isym)
489 Elf_Internal_Sym *isym;
491 unsigned int iname = isym->st_name;
492 unsigned int shindex = elf_tdata (abfd)->symtab_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 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
503 sections. The first element is the flags, the rest are section
506 typedef union elf_internal_group {
507 Elf_Internal_Shdr *shdr;
509 } Elf_Internal_Group;
511 /* Return the name of the group signature symbol. Why isn't the
512 signature just a string? */
515 group_signature (abfd, ghdr)
517 Elf_Internal_Shdr *ghdr;
519 Elf_Internal_Shdr *hdr;
520 unsigned char esym[sizeof (Elf64_External_Sym)];
521 Elf_External_Sym_Shndx eshndx;
522 Elf_Internal_Sym isym;
524 /* First we need to ensure the symbol table is available. */
525 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
528 /* Go read the symbol. */
529 hdr = &elf_tdata (abfd)->symtab_hdr;
530 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
531 &isym, esym, &eshndx) == NULL)
534 return bfd_elf_local_sym_name (abfd, &isym);
537 /* Set next_in_group list pointer, and group name for NEWSECT. */
540 setup_group (abfd, hdr, newsect)
542 Elf_Internal_Shdr *hdr;
545 unsigned int num_group = elf_tdata (abfd)->num_group;
547 /* If num_group is zero, read in all SHT_GROUP sections. The count
548 is set to -1 if there are no SHT_GROUP sections. */
551 unsigned int i, shnum;
553 /* First count the number of groups. If we have a SHT_GROUP
554 section with just a flag word (ie. sh_size is 4), ignore it. */
555 shnum = elf_numsections (abfd);
557 for (i = 0; i < shnum; i++)
559 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
560 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
565 num_group = (unsigned) -1;
566 elf_tdata (abfd)->num_group = num_group;
570 /* We keep a list of elf section headers for group sections,
571 so we can find them quickly. */
572 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
573 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
574 if (elf_tdata (abfd)->group_sect_ptr == NULL)
578 for (i = 0; i < shnum; i++)
580 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
581 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
584 Elf_Internal_Group *dest;
586 /* Add to list of sections. */
587 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
590 /* Read the raw contents. */
591 BFD_ASSERT (sizeof (*dest) >= 4);
592 amt = shdr->sh_size * sizeof (*dest) / 4;
593 shdr->contents = bfd_alloc (abfd, amt);
594 if (shdr->contents == NULL
595 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
596 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
600 /* Translate raw contents, a flag word followed by an
601 array of elf section indices all in target byte order,
602 to the flag word followed by an array of elf section
604 src = shdr->contents + shdr->sh_size;
605 dest = (Elf_Internal_Group *) (shdr->contents + amt);
612 idx = H_GET_32 (abfd, src);
613 if (src == shdr->contents)
616 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
617 shdr->bfd_section->flags
618 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
623 ((*_bfd_error_handler)
624 (_("%s: invalid SHT_GROUP entry"),
625 bfd_archive_filename (abfd)));
628 dest->shdr = elf_elfsections (abfd)[idx];
635 if (num_group != (unsigned) -1)
639 for (i = 0; i < num_group; i++)
641 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
642 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
643 unsigned int n_elt = shdr->sh_size / 4;
645 /* Look through this group's sections to see if current
646 section is a member. */
648 if ((++idx)->shdr == hdr)
652 /* We are a member of this group. Go looking through
653 other members to see if any others are linked via
655 idx = (Elf_Internal_Group *) shdr->contents;
656 n_elt = shdr->sh_size / 4;
658 if ((s = (++idx)->shdr->bfd_section) != NULL
659 && elf_next_in_group (s) != NULL)
663 /* Snarf the group name from other member, and
664 insert current section in circular list. */
665 elf_group_name (newsect) = elf_group_name (s);
666 elf_next_in_group (newsect) = elf_next_in_group (s);
667 elf_next_in_group (s) = newsect;
673 gname = group_signature (abfd, shdr);
676 elf_group_name (newsect) = gname;
678 /* Start a circular list with one element. */
679 elf_next_in_group (newsect) = newsect;
682 /* If the group section has been created, point to the
684 if (shdr->bfd_section != NULL)
685 elf_next_in_group (shdr->bfd_section) = newsect;
693 if (elf_group_name (newsect) == NULL)
695 (*_bfd_error_handler) (_("%s: no group info for section %s"),
696 bfd_archive_filename (abfd), newsect->name);
702 bfd_elf_discard_group (abfd, group)
703 bfd *abfd ATTRIBUTE_UNUSED;
706 asection *first = elf_next_in_group (group);
711 s->output_section = bfd_abs_section_ptr;
712 s = elf_next_in_group (s);
713 /* These lists are circular. */
720 /* Make a BFD section from an ELF section. We store a pointer to the
721 BFD section in the bfd_section field of the header. */
724 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
726 Elf_Internal_Shdr *hdr;
731 struct elf_backend_data *bed;
733 if (hdr->bfd_section != NULL)
735 BFD_ASSERT (strcmp (name,
736 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
740 newsect = bfd_make_section_anyway (abfd, name);
744 /* Always use the real type/flags. */
745 elf_section_type (newsect) = hdr->sh_type;
746 elf_section_flags (newsect) = hdr->sh_flags;
748 newsect->filepos = hdr->sh_offset;
750 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
751 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
752 || ! bfd_set_section_alignment (abfd, newsect,
753 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
756 flags = SEC_NO_FLAGS;
757 if (hdr->sh_type != SHT_NOBITS)
758 flags |= SEC_HAS_CONTENTS;
759 if (hdr->sh_type == SHT_GROUP)
760 flags |= SEC_GROUP | SEC_EXCLUDE;
761 if ((hdr->sh_flags & SHF_ALLOC) != 0)
764 if (hdr->sh_type != SHT_NOBITS)
767 if ((hdr->sh_flags & SHF_WRITE) == 0)
768 flags |= SEC_READONLY;
769 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
771 else if ((flags & SEC_LOAD) != 0)
773 if ((hdr->sh_flags & SHF_MERGE) != 0)
776 newsect->entsize = hdr->sh_entsize;
777 if ((hdr->sh_flags & SHF_STRINGS) != 0)
778 flags |= SEC_STRINGS;
780 if (hdr->sh_flags & SHF_GROUP)
781 if (!setup_group (abfd, hdr, newsect))
783 if ((hdr->sh_flags & SHF_TLS) != 0)
784 flags |= SEC_THREAD_LOCAL;
786 /* The debugging sections appear to be recognized only by name, not
789 static const char *debug_sec_names [] =
798 for (i = ARRAY_SIZE (debug_sec_names); i--;)
799 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
803 flags |= SEC_DEBUGGING;
806 /* As a GNU extension, if the name begins with .gnu.linkonce, we
807 only link a single copy of the section. This is used to support
808 g++. g++ will emit each template expansion in its own section.
809 The symbols will be defined as weak, so that multiple definitions
810 are permitted. The GNU linker extension is to actually discard
811 all but one of the sections. */
812 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
813 && elf_next_in_group (newsect) == NULL)
814 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
816 bed = get_elf_backend_data (abfd);
817 if (bed->elf_backend_section_flags)
818 if (! bed->elf_backend_section_flags (&flags, hdr))
821 if (! bfd_set_section_flags (abfd, newsect, flags))
824 if ((flags & SEC_ALLOC) != 0)
826 Elf_Internal_Phdr *phdr;
829 /* Look through the phdrs to see if we need to adjust the lma.
830 If all the p_paddr fields are zero, we ignore them, since
831 some ELF linkers produce such output. */
832 phdr = elf_tdata (abfd)->phdr;
833 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
835 if (phdr->p_paddr != 0)
838 if (i < elf_elfheader (abfd)->e_phnum)
840 phdr = elf_tdata (abfd)->phdr;
841 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
843 /* This section is part of this segment if its file
844 offset plus size lies within the segment's memory
845 span and, if the section is loaded, the extent of the
846 loaded data lies within the extent of the segment.
848 Note - we used to check the p_paddr field as well, and
849 refuse to set the LMA if it was 0. This is wrong
850 though, as a perfectly valid initialised segment can
851 have a p_paddr of zero. Some architectures, eg ARM,
852 place special significance on the address 0 and
853 executables need to be able to have a segment which
854 covers this address. */
855 if (phdr->p_type == PT_LOAD
856 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
857 && (hdr->sh_offset + hdr->sh_size
858 <= phdr->p_offset + phdr->p_memsz)
859 && ((flags & SEC_LOAD) == 0
860 || (hdr->sh_offset + hdr->sh_size
861 <= phdr->p_offset + phdr->p_filesz)))
863 if ((flags & SEC_LOAD) == 0)
864 newsect->lma = (phdr->p_paddr
865 + hdr->sh_addr - phdr->p_vaddr);
867 /* We used to use the same adjustment for SEC_LOAD
868 sections, but that doesn't work if the segment
869 is packed with code from multiple VMAs.
870 Instead we calculate the section LMA based on
871 the segment LMA. It is assumed that the
872 segment will contain sections with contiguous
873 LMAs, even if the VMAs are not. */
874 newsect->lma = (phdr->p_paddr
875 + hdr->sh_offset - phdr->p_offset);
877 /* With contiguous segments, we can't tell from file
878 offsets whether a section with zero size should
879 be placed at the end of one segment or the
880 beginning of the next. Decide based on vaddr. */
881 if (hdr->sh_addr >= phdr->p_vaddr
882 && (hdr->sh_addr + hdr->sh_size
883 <= phdr->p_vaddr + phdr->p_memsz))
890 hdr->bfd_section = newsect;
891 elf_section_data (newsect)->this_hdr = *hdr;
901 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
904 Helper functions for GDB to locate the string tables.
905 Since BFD hides string tables from callers, GDB needs to use an
906 internal hook to find them. Sun's .stabstr, in particular,
907 isn't even pointed to by the .stab section, so ordinary
908 mechanisms wouldn't work to find it, even if we had some.
911 struct elf_internal_shdr *
912 bfd_elf_find_section (abfd, name)
916 Elf_Internal_Shdr **i_shdrp;
921 i_shdrp = elf_elfsections (abfd);
924 shstrtab = bfd_elf_get_str_section (abfd,
925 elf_elfheader (abfd)->e_shstrndx);
926 if (shstrtab != NULL)
928 max = elf_numsections (abfd);
929 for (i = 1; i < max; i++)
930 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
937 const char *const bfd_elf_section_type_names[] = {
938 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
939 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
940 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
943 /* ELF relocs are against symbols. If we are producing relocatable
944 output, and the reloc is against an external symbol, and nothing
945 has given us any additional addend, the resulting reloc will also
946 be against the same symbol. In such a case, we don't want to
947 change anything about the way the reloc is handled, since it will
948 all be done at final link time. Rather than put special case code
949 into bfd_perform_relocation, all the reloc types use this howto
950 function. It just short circuits the reloc if producing
951 relocatable output against an external symbol. */
953 bfd_reloc_status_type
954 bfd_elf_generic_reloc (abfd,
961 bfd *abfd ATTRIBUTE_UNUSED;
962 arelent *reloc_entry;
964 PTR data ATTRIBUTE_UNUSED;
965 asection *input_section;
967 char **error_message ATTRIBUTE_UNUSED;
969 if (output_bfd != (bfd *) NULL
970 && (symbol->flags & BSF_SECTION_SYM) == 0
971 && (! reloc_entry->howto->partial_inplace
972 || reloc_entry->addend == 0))
974 reloc_entry->address += input_section->output_offset;
978 return bfd_reloc_continue;
981 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
984 merge_sections_remove_hook (abfd, sec)
985 bfd *abfd ATTRIBUTE_UNUSED;
988 BFD_ASSERT (sec->sec_info_type == ELF_INFO_TYPE_MERGE);
989 sec->sec_info_type = ELF_INFO_TYPE_NONE;
992 /* Finish SHF_MERGE section merging. */
995 _bfd_elf_merge_sections (abfd, info)
997 struct bfd_link_info *info;
999 if (!is_elf_hash_table (info))
1001 if (elf_hash_table (info)->merge_info)
1002 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
1003 merge_sections_remove_hook);
1008 _bfd_elf_link_just_syms (sec, info)
1010 struct bfd_link_info *info;
1012 sec->output_section = bfd_abs_section_ptr;
1013 sec->output_offset = sec->vma;
1014 if (!is_elf_hash_table (info))
1017 sec->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
1020 /* Copy the program header and other data from one object module to
1024 _bfd_elf_copy_private_bfd_data (ibfd, obfd)
1028 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1029 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1032 BFD_ASSERT (!elf_flags_init (obfd)
1033 || (elf_elfheader (obfd)->e_flags
1034 == elf_elfheader (ibfd)->e_flags));
1036 elf_gp (obfd) = elf_gp (ibfd);
1037 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1038 elf_flags_init (obfd) = TRUE;
1042 /* Print out the program headers. */
1045 _bfd_elf_print_private_bfd_data (abfd, farg)
1049 FILE *f = (FILE *) farg;
1050 Elf_Internal_Phdr *p;
1052 bfd_byte *dynbuf = NULL;
1054 p = elf_tdata (abfd)->phdr;
1059 fprintf (f, _("\nProgram Header:\n"));
1060 c = elf_elfheader (abfd)->e_phnum;
1061 for (i = 0; i < c; i++, p++)
1068 case PT_NULL: pt = "NULL"; break;
1069 case PT_LOAD: pt = "LOAD"; break;
1070 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1071 case PT_INTERP: pt = "INTERP"; break;
1072 case PT_NOTE: pt = "NOTE"; break;
1073 case PT_SHLIB: pt = "SHLIB"; break;
1074 case PT_PHDR: pt = "PHDR"; break;
1075 case PT_TLS: pt = "TLS"; break;
1076 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1077 case PT_GNU_STACK: pt = "STACK"; break;
1078 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
1080 fprintf (f, "%8s off 0x", pt);
1081 bfd_fprintf_vma (abfd, f, p->p_offset);
1082 fprintf (f, " vaddr 0x");
1083 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1084 fprintf (f, " paddr 0x");
1085 bfd_fprintf_vma (abfd, f, p->p_paddr);
1086 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1087 fprintf (f, " filesz 0x");
1088 bfd_fprintf_vma (abfd, f, p->p_filesz);
1089 fprintf (f, " memsz 0x");
1090 bfd_fprintf_vma (abfd, f, p->p_memsz);
1091 fprintf (f, " flags %c%c%c",
1092 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1093 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1094 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1095 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1096 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1101 s = bfd_get_section_by_name (abfd, ".dynamic");
1105 unsigned long shlink;
1106 bfd_byte *extdyn, *extdynend;
1108 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1110 fprintf (f, _("\nDynamic Section:\n"));
1112 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1115 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1119 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1122 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1124 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1125 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1128 extdynend = extdyn + s->_raw_size;
1129 for (; extdyn < extdynend; extdyn += extdynsize)
1131 Elf_Internal_Dyn dyn;
1134 bfd_boolean stringp;
1136 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1138 if (dyn.d_tag == DT_NULL)
1145 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1149 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1150 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1151 case DT_PLTGOT: name = "PLTGOT"; break;
1152 case DT_HASH: name = "HASH"; break;
1153 case DT_STRTAB: name = "STRTAB"; break;
1154 case DT_SYMTAB: name = "SYMTAB"; break;
1155 case DT_RELA: name = "RELA"; break;
1156 case DT_RELASZ: name = "RELASZ"; break;
1157 case DT_RELAENT: name = "RELAENT"; break;
1158 case DT_STRSZ: name = "STRSZ"; break;
1159 case DT_SYMENT: name = "SYMENT"; break;
1160 case DT_INIT: name = "INIT"; break;
1161 case DT_FINI: name = "FINI"; break;
1162 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1163 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1164 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1165 case DT_REL: name = "REL"; break;
1166 case DT_RELSZ: name = "RELSZ"; break;
1167 case DT_RELENT: name = "RELENT"; break;
1168 case DT_PLTREL: name = "PLTREL"; break;
1169 case DT_DEBUG: name = "DEBUG"; break;
1170 case DT_TEXTREL: name = "TEXTREL"; break;
1171 case DT_JMPREL: name = "JMPREL"; break;
1172 case DT_BIND_NOW: name = "BIND_NOW"; break;
1173 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1174 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1175 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1176 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1177 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1178 case DT_FLAGS: name = "FLAGS"; break;
1179 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1180 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1181 case DT_CHECKSUM: name = "CHECKSUM"; break;
1182 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1183 case DT_MOVEENT: name = "MOVEENT"; break;
1184 case DT_MOVESZ: name = "MOVESZ"; break;
1185 case DT_FEATURE: name = "FEATURE"; break;
1186 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1187 case DT_SYMINSZ: name = "SYMINSZ"; break;
1188 case DT_SYMINENT: name = "SYMINENT"; break;
1189 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1190 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1191 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1192 case DT_PLTPAD: name = "PLTPAD"; break;
1193 case DT_MOVETAB: name = "MOVETAB"; break;
1194 case DT_SYMINFO: name = "SYMINFO"; break;
1195 case DT_RELACOUNT: name = "RELACOUNT"; break;
1196 case DT_RELCOUNT: name = "RELCOUNT"; break;
1197 case DT_FLAGS_1: name = "FLAGS_1"; break;
1198 case DT_VERSYM: name = "VERSYM"; break;
1199 case DT_VERDEF: name = "VERDEF"; break;
1200 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1201 case DT_VERNEED: name = "VERNEED"; break;
1202 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1203 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1204 case DT_USED: name = "USED"; break;
1205 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1208 fprintf (f, " %-11s ", name);
1210 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1214 unsigned int tagv = dyn.d_un.d_val;
1216 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1219 fprintf (f, "%s", string);
1228 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1229 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1231 if (! _bfd_elf_slurp_version_tables (abfd))
1235 if (elf_dynverdef (abfd) != 0)
1237 Elf_Internal_Verdef *t;
1239 fprintf (f, _("\nVersion definitions:\n"));
1240 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1242 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1243 t->vd_flags, t->vd_hash, t->vd_nodename);
1244 if (t->vd_auxptr->vda_nextptr != NULL)
1246 Elf_Internal_Verdaux *a;
1249 for (a = t->vd_auxptr->vda_nextptr;
1252 fprintf (f, "%s ", a->vda_nodename);
1258 if (elf_dynverref (abfd) != 0)
1260 Elf_Internal_Verneed *t;
1262 fprintf (f, _("\nVersion References:\n"));
1263 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1265 Elf_Internal_Vernaux *a;
1267 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1268 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1269 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1270 a->vna_flags, a->vna_other, a->vna_nodename);
1282 /* Display ELF-specific fields of a symbol. */
1285 bfd_elf_print_symbol (abfd, filep, symbol, how)
1289 bfd_print_symbol_type how;
1291 FILE *file = (FILE *) filep;
1294 case bfd_print_symbol_name:
1295 fprintf (file, "%s", symbol->name);
1297 case bfd_print_symbol_more:
1298 fprintf (file, "elf ");
1299 bfd_fprintf_vma (abfd, file, symbol->value);
1300 fprintf (file, " %lx", (long) symbol->flags);
1302 case bfd_print_symbol_all:
1304 const char *section_name;
1305 const char *name = NULL;
1306 struct elf_backend_data *bed;
1307 unsigned char st_other;
1310 section_name = symbol->section ? symbol->section->name : "(*none*)";
1312 bed = get_elf_backend_data (abfd);
1313 if (bed->elf_backend_print_symbol_all)
1314 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1318 name = symbol->name;
1319 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1322 fprintf (file, " %s\t", section_name);
1323 /* Print the "other" value for a symbol. For common symbols,
1324 we've already printed the size; now print the alignment.
1325 For other symbols, we have no specified alignment, and
1326 we've printed the address; now print the size. */
1327 if (bfd_is_com_section (symbol->section))
1328 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1330 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1331 bfd_fprintf_vma (abfd, file, val);
1333 /* If we have version information, print it. */
1334 if (elf_tdata (abfd)->dynversym_section != 0
1335 && (elf_tdata (abfd)->dynverdef_section != 0
1336 || elf_tdata (abfd)->dynverref_section != 0))
1338 unsigned int vernum;
1339 const char *version_string;
1341 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1344 version_string = "";
1345 else if (vernum == 1)
1346 version_string = "Base";
1347 else if (vernum <= elf_tdata (abfd)->cverdefs)
1349 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1352 Elf_Internal_Verneed *t;
1354 version_string = "";
1355 for (t = elf_tdata (abfd)->verref;
1359 Elf_Internal_Vernaux *a;
1361 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1363 if (a->vna_other == vernum)
1365 version_string = a->vna_nodename;
1372 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1373 fprintf (file, " %-11s", version_string);
1378 fprintf (file, " (%s)", version_string);
1379 for (i = 10 - strlen (version_string); i > 0; --i)
1384 /* If the st_other field is not zero, print it. */
1385 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1390 case STV_INTERNAL: fprintf (file, " .internal"); break;
1391 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1392 case STV_PROTECTED: fprintf (file, " .protected"); break;
1394 /* Some other non-defined flags are also present, so print
1396 fprintf (file, " 0x%02x", (unsigned int) st_other);
1399 fprintf (file, " %s", name);
1405 /* Create an entry in an ELF linker hash table. */
1407 struct bfd_hash_entry *
1408 _bfd_elf_link_hash_newfunc (entry, table, string)
1409 struct bfd_hash_entry *entry;
1410 struct bfd_hash_table *table;
1413 /* Allocate the structure if it has not already been allocated by a
1417 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1422 /* Call the allocation method of the superclass. */
1423 entry = _bfd_link_hash_newfunc (entry, table, string);
1426 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1427 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1429 /* Set local fields. */
1432 ret->dynstr_index = 0;
1433 ret->elf_hash_value = 0;
1434 ret->weakdef = NULL;
1435 ret->verinfo.verdef = NULL;
1436 ret->vtable_entries_size = 0;
1437 ret->vtable_entries_used = NULL;
1438 ret->vtable_parent = NULL;
1439 ret->got = htab->init_refcount;
1440 ret->plt = htab->init_refcount;
1442 ret->type = STT_NOTYPE;
1444 /* Assume that we have been called by a non-ELF symbol reader.
1445 This flag is then reset by the code which reads an ELF input
1446 file. This ensures that a symbol created by a non-ELF symbol
1447 reader will have the flag set correctly. */
1448 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1454 /* Copy data from an indirect symbol to its direct symbol, hiding the
1455 old indirect symbol. Also used for copying flags to a weakdef. */
1458 _bfd_elf_link_hash_copy_indirect (bed, dir, ind)
1459 struct elf_backend_data *bed;
1460 struct elf_link_hash_entry *dir, *ind;
1463 bfd_signed_vma lowest_valid = bed->can_refcount;
1465 /* Copy down any references that we may have already seen to the
1466 symbol which just became indirect. */
1468 dir->elf_link_hash_flags |=
1469 (ind->elf_link_hash_flags
1470 & (ELF_LINK_HASH_REF_DYNAMIC
1471 | ELF_LINK_HASH_REF_REGULAR
1472 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1473 | ELF_LINK_NON_GOT_REF));
1475 if (ind->root.type != bfd_link_hash_indirect)
1478 /* Copy over the global and procedure linkage table refcount entries.
1479 These may have been already set up by a check_relocs routine. */
1480 tmp = dir->got.refcount;
1481 if (tmp < lowest_valid)
1483 dir->got.refcount = ind->got.refcount;
1484 ind->got.refcount = tmp;
1487 BFD_ASSERT (ind->got.refcount < lowest_valid);
1489 tmp = dir->plt.refcount;
1490 if (tmp < lowest_valid)
1492 dir->plt.refcount = ind->plt.refcount;
1493 ind->plt.refcount = tmp;
1496 BFD_ASSERT (ind->plt.refcount < lowest_valid);
1498 if (dir->dynindx == -1)
1500 dir->dynindx = ind->dynindx;
1501 dir->dynstr_index = ind->dynstr_index;
1503 ind->dynstr_index = 0;
1506 BFD_ASSERT (ind->dynindx == -1);
1510 _bfd_elf_link_hash_hide_symbol (info, h, force_local)
1511 struct bfd_link_info *info;
1512 struct elf_link_hash_entry *h;
1513 bfd_boolean force_local;
1515 h->plt = elf_hash_table (info)->init_offset;
1516 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1519 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1520 if (h->dynindx != -1)
1523 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1529 /* Initialize an ELF linker hash table. */
1532 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
1533 struct elf_link_hash_table *table;
1535 struct bfd_hash_entry *(*newfunc)
1536 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
1541 table->dynamic_sections_created = FALSE;
1542 table->dynobj = NULL;
1543 /* Make sure can_refcount is extended to the width and signedness of
1544 init_refcount before we subtract one from it. */
1545 table->init_refcount.refcount = get_elf_backend_data (abfd)->can_refcount;
1546 table->init_refcount.refcount -= 1;
1547 table->init_offset.offset = -(bfd_vma) 1;
1548 /* The first dynamic symbol is a dummy. */
1549 table->dynsymcount = 1;
1550 table->dynstr = NULL;
1551 table->bucketcount = 0;
1552 table->needed = NULL;
1554 table->stab_info = NULL;
1555 table->merge_info = NULL;
1556 memset (&table->eh_info, 0, sizeof (table->eh_info));
1557 table->dynlocal = NULL;
1558 table->runpath = NULL;
1559 table->tls_segment = NULL;
1560 table->loaded = NULL;
1562 ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc);
1563 table->root.type = bfd_link_elf_hash_table;
1568 /* Create an ELF linker hash table. */
1570 struct bfd_link_hash_table *
1571 _bfd_elf_link_hash_table_create (abfd)
1574 struct elf_link_hash_table *ret;
1575 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1577 ret = (struct elf_link_hash_table *) bfd_malloc (amt);
1578 if (ret == (struct elf_link_hash_table *) NULL)
1581 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1590 /* This is a hook for the ELF emulation code in the generic linker to
1591 tell the backend linker what file name to use for the DT_NEEDED
1592 entry for a dynamic object. The generic linker passes name as an
1593 empty string to indicate that no DT_NEEDED entry should be made. */
1596 bfd_elf_set_dt_needed_name (abfd, name)
1600 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1601 && bfd_get_format (abfd) == bfd_object)
1602 elf_dt_name (abfd) = name;
1606 bfd_elf_set_dt_needed_soname (abfd, name)
1610 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1611 && bfd_get_format (abfd) == bfd_object)
1612 elf_dt_soname (abfd) = name;
1615 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1616 the linker ELF emulation code. */
1618 struct bfd_link_needed_list *
1619 bfd_elf_get_needed_list (abfd, info)
1620 bfd *abfd ATTRIBUTE_UNUSED;
1621 struct bfd_link_info *info;
1623 if (! is_elf_hash_table (info))
1625 return elf_hash_table (info)->needed;
1628 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1629 hook for the linker ELF emulation code. */
1631 struct bfd_link_needed_list *
1632 bfd_elf_get_runpath_list (abfd, info)
1633 bfd *abfd ATTRIBUTE_UNUSED;
1634 struct bfd_link_info *info;
1636 if (! is_elf_hash_table (info))
1638 return elf_hash_table (info)->runpath;
1641 /* Get the name actually used for a dynamic object for a link. This
1642 is the SONAME entry if there is one. Otherwise, it is the string
1643 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1646 bfd_elf_get_dt_soname (abfd)
1649 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1650 && bfd_get_format (abfd) == bfd_object)
1651 return elf_dt_name (abfd);
1655 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1656 the ELF linker emulation code. */
1659 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1661 struct bfd_link_needed_list **pneeded;
1664 bfd_byte *dynbuf = NULL;
1666 unsigned long shlink;
1667 bfd_byte *extdyn, *extdynend;
1669 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1673 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1674 || bfd_get_format (abfd) != bfd_object)
1677 s = bfd_get_section_by_name (abfd, ".dynamic");
1678 if (s == NULL || s->_raw_size == 0)
1681 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1685 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1689 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1693 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1695 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1696 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1699 extdynend = extdyn + s->_raw_size;
1700 for (; extdyn < extdynend; extdyn += extdynsize)
1702 Elf_Internal_Dyn dyn;
1704 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1706 if (dyn.d_tag == DT_NULL)
1709 if (dyn.d_tag == DT_NEEDED)
1712 struct bfd_link_needed_list *l;
1713 unsigned int tagv = dyn.d_un.d_val;
1716 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1721 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
1742 /* Allocate an ELF string table--force the first byte to be zero. */
1744 struct bfd_strtab_hash *
1745 _bfd_elf_stringtab_init ()
1747 struct bfd_strtab_hash *ret;
1749 ret = _bfd_stringtab_init ();
1754 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1755 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1756 if (loc == (bfd_size_type) -1)
1758 _bfd_stringtab_free (ret);
1765 /* ELF .o/exec file reading */
1767 /* Create a new bfd section from an ELF section header. */
1770 bfd_section_from_shdr (abfd, shindex)
1772 unsigned int shindex;
1774 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1775 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1776 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1779 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1781 switch (hdr->sh_type)
1784 /* Inactive section. Throw it away. */
1787 case SHT_PROGBITS: /* Normal section with contents. */
1788 case SHT_NOBITS: /* .bss section. */
1789 case SHT_HASH: /* .hash section. */
1790 case SHT_NOTE: /* .note section. */
1791 case SHT_INIT_ARRAY: /* .init_array section. */
1792 case SHT_FINI_ARRAY: /* .fini_array section. */
1793 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1794 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1796 case SHT_DYNAMIC: /* Dynamic linking information. */
1797 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1799 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1801 Elf_Internal_Shdr *dynsymhdr;
1803 /* The shared libraries distributed with hpux11 have a bogus
1804 sh_link field for the ".dynamic" section. Find the
1805 string table for the ".dynsym" section instead. */
1806 if (elf_dynsymtab (abfd) != 0)
1808 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1809 hdr->sh_link = dynsymhdr->sh_link;
1813 unsigned int i, num_sec;
1815 num_sec = elf_numsections (abfd);
1816 for (i = 1; i < num_sec; i++)
1818 dynsymhdr = elf_elfsections (abfd)[i];
1819 if (dynsymhdr->sh_type == SHT_DYNSYM)
1821 hdr->sh_link = dynsymhdr->sh_link;
1829 case SHT_SYMTAB: /* A symbol table */
1830 if (elf_onesymtab (abfd) == shindex)
1833 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1834 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1835 elf_onesymtab (abfd) = shindex;
1836 elf_tdata (abfd)->symtab_hdr = *hdr;
1837 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1838 abfd->flags |= HAS_SYMS;
1840 /* Sometimes a shared object will map in the symbol table. If
1841 SHF_ALLOC is set, and this is a shared object, then we also
1842 treat this section as a BFD section. We can not base the
1843 decision purely on SHF_ALLOC, because that flag is sometimes
1844 set in a relocatable object file, which would confuse the
1846 if ((hdr->sh_flags & SHF_ALLOC) != 0
1847 && (abfd->flags & DYNAMIC) != 0
1848 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1853 case SHT_DYNSYM: /* A dynamic symbol table */
1854 if (elf_dynsymtab (abfd) == shindex)
1857 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1858 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1859 elf_dynsymtab (abfd) = shindex;
1860 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1861 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1862 abfd->flags |= HAS_SYMS;
1864 /* Besides being a symbol table, we also treat this as a regular
1865 section, so that objcopy can handle it. */
1866 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1868 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1869 if (elf_symtab_shndx (abfd) == shindex)
1872 /* Get the associated symbol table. */
1873 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1874 || hdr->sh_link != elf_onesymtab (abfd))
1877 elf_symtab_shndx (abfd) = shindex;
1878 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1879 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1882 case SHT_STRTAB: /* A string table */
1883 if (hdr->bfd_section != NULL)
1885 if (ehdr->e_shstrndx == shindex)
1887 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1888 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1892 unsigned int i, num_sec;
1894 num_sec = elf_numsections (abfd);
1895 for (i = 1; i < num_sec; i++)
1897 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1898 if (hdr2->sh_link == shindex)
1900 if (! bfd_section_from_shdr (abfd, i))
1902 if (elf_onesymtab (abfd) == i)
1904 elf_tdata (abfd)->strtab_hdr = *hdr;
1905 elf_elfsections (abfd)[shindex] =
1906 &elf_tdata (abfd)->strtab_hdr;
1909 if (elf_dynsymtab (abfd) == i)
1911 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1912 elf_elfsections (abfd)[shindex] = hdr =
1913 &elf_tdata (abfd)->dynstrtab_hdr;
1914 /* We also treat this as a regular section, so
1915 that objcopy can handle it. */
1918 #if 0 /* Not handling other string tables specially right now. */
1919 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1920 /* We have a strtab for some random other section. */
1921 newsect = (asection *) hdr2->bfd_section;
1924 hdr->bfd_section = newsect;
1925 hdr2 = &elf_section_data (newsect)->str_hdr;
1927 elf_elfsections (abfd)[shindex] = hdr2;
1933 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1937 /* *These* do a lot of work -- but build no sections! */
1939 asection *target_sect;
1940 Elf_Internal_Shdr *hdr2;
1941 unsigned int num_sec = elf_numsections (abfd);
1943 /* Check for a bogus link to avoid crashing. */
1944 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1945 || hdr->sh_link >= num_sec)
1947 ((*_bfd_error_handler)
1948 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1949 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1950 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1953 /* For some incomprehensible reason Oracle distributes
1954 libraries for Solaris in which some of the objects have
1955 bogus sh_link fields. It would be nice if we could just
1956 reject them, but, unfortunately, some people need to use
1957 them. We scan through the section headers; if we find only
1958 one suitable symbol table, we clobber the sh_link to point
1959 to it. I hope this doesn't break anything. */
1960 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1961 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1967 for (scan = 1; scan < num_sec; scan++)
1969 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1970 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1981 hdr->sh_link = found;
1984 /* Get the symbol table. */
1985 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1986 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1989 /* If this reloc section does not use the main symbol table we
1990 don't treat it as a reloc section. BFD can't adequately
1991 represent such a section, so at least for now, we don't
1992 try. We just present it as a normal section. We also
1993 can't use it as a reloc section if it points to the null
1995 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1996 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1998 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
2000 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
2001 if (target_sect == NULL)
2004 if ((target_sect->flags & SEC_RELOC) == 0
2005 || target_sect->reloc_count == 0)
2006 hdr2 = &elf_section_data (target_sect)->rel_hdr;
2010 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
2011 amt = sizeof (*hdr2);
2012 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2013 elf_section_data (target_sect)->rel_hdr2 = hdr2;
2016 elf_elfsections (abfd)[shindex] = hdr2;
2017 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
2018 target_sect->flags |= SEC_RELOC;
2019 target_sect->relocation = NULL;
2020 target_sect->rel_filepos = hdr->sh_offset;
2021 /* In the section to which the relocations apply, mark whether
2022 its relocations are of the REL or RELA variety. */
2023 if (hdr->sh_size != 0)
2024 target_sect->use_rela_p = hdr->sh_type == SHT_RELA;
2025 abfd->flags |= HAS_RELOC;
2030 case SHT_GNU_verdef:
2031 elf_dynverdef (abfd) = shindex;
2032 elf_tdata (abfd)->dynverdef_hdr = *hdr;
2033 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2036 case SHT_GNU_versym:
2037 elf_dynversym (abfd) = shindex;
2038 elf_tdata (abfd)->dynversym_hdr = *hdr;
2039 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2042 case SHT_GNU_verneed:
2043 elf_dynverref (abfd) = shindex;
2044 elf_tdata (abfd)->dynverref_hdr = *hdr;
2045 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
2052 /* We need a BFD section for objcopy and relocatable linking,
2053 and it's handy to have the signature available as the section
2055 name = group_signature (abfd, hdr);
2058 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
2060 if (hdr->contents != NULL)
2062 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
2063 unsigned int n_elt = hdr->sh_size / 4;
2066 if (idx->flags & GRP_COMDAT)
2067 hdr->bfd_section->flags
2068 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2070 while (--n_elt != 0)
2071 if ((s = (++idx)->shdr->bfd_section) != NULL
2072 && elf_next_in_group (s) != NULL)
2074 elf_next_in_group (hdr->bfd_section) = s;
2081 /* Check for any processor-specific section types. */
2083 if (bed->elf_backend_section_from_shdr)
2084 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
2092 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2093 Return SEC for sections that have no elf section, and NULL on error. */
2096 bfd_section_from_r_symndx (abfd, cache, sec, r_symndx)
2098 struct sym_sec_cache *cache;
2100 unsigned long r_symndx;
2102 Elf_Internal_Shdr *symtab_hdr;
2103 unsigned char esym[sizeof (Elf64_External_Sym)];
2104 Elf_External_Sym_Shndx eshndx;
2105 Elf_Internal_Sym isym;
2106 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2108 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
2109 return cache->sec[ent];
2111 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2112 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2113 &isym, esym, &eshndx) == NULL)
2116 if (cache->abfd != abfd)
2118 memset (cache->indx, -1, sizeof (cache->indx));
2121 cache->indx[ent] = r_symndx;
2122 cache->sec[ent] = sec;
2123 if (isym.st_shndx < SHN_LORESERVE || isym.st_shndx > SHN_HIRESERVE)
2126 s = bfd_section_from_elf_index (abfd, isym.st_shndx);
2128 cache->sec[ent] = s;
2130 return cache->sec[ent];
2133 /* Given an ELF section number, retrieve the corresponding BFD
2137 bfd_section_from_elf_index (abfd, index)
2141 if (index >= elf_numsections (abfd))
2143 return elf_elfsections (abfd)[index]->bfd_section;
2146 static struct bfd_elf_special_section const special_sections[] =
2148 { ".bss", 0, NULL, 0,
2149 SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2150 { ".comment", 0, NULL, 0,
2152 { ".data", 0, NULL, 0,
2153 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2154 { ".data1", 0, NULL, 0,
2155 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2156 { ".debug", 0, NULL, 0,
2158 { ".fini", 0, NULL, 0,
2159 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2160 { ".init", 0, NULL, 0,
2161 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2162 { ".line", 0, NULL, 0,
2164 { ".rodata", 0, NULL, 0,
2165 SHT_PROGBITS, SHF_ALLOC },
2166 { ".rodata1", 0, NULL, 0,
2167 SHT_PROGBITS, SHF_ALLOC },
2168 { ".tbss", 0, NULL, 0,
2169 SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2170 { ".tdata", 0, NULL, 0,
2171 SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2172 { ".text", 0, NULL, 0,
2173 SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2174 { ".init_array", 0, NULL, 0,
2175 SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2176 { ".fini_array", 0, NULL, 0,
2177 SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2178 { ".preinit_array", 0, NULL, 0,
2179 SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2180 { ".debug_line", 0, NULL, 0,
2182 { ".debug_info", 0, NULL, 0,
2184 { ".debug_abbrev", 0, NULL, 0,
2186 { ".debug_aranges", 0, NULL, 0,
2188 { ".dynamic", 0, NULL, 0,
2189 SHT_DYNAMIC, SHF_ALLOC },
2190 { ".dynstr", 0, NULL, 0,
2191 SHT_STRTAB, SHF_ALLOC },
2192 { ".dynsym", 0, NULL, 0,
2193 SHT_DYNSYM, SHF_ALLOC },
2194 { ".got", 0, NULL, 0,
2196 { ".hash", 0, NULL, 0,
2197 SHT_HASH, SHF_ALLOC },
2198 { ".interp", 0, NULL, 0,
2200 { ".plt", 0, NULL, 0,
2202 { ".shstrtab", 0, NULL, 0,
2204 { ".strtab", 0, NULL, 0,
2206 { ".symtab", 0, NULL, 0,
2208 { ".gnu.version", 0, NULL, 0,
2209 SHT_GNU_versym, 0 },
2210 { ".gnu.version_d", 0, NULL, 0,
2211 SHT_GNU_verdef, 0 },
2212 { ".gnu.version_r", 0, NULL, 0,
2213 SHT_GNU_verneed, 0 },
2214 { ".note", 5, NULL, 0,
2216 { ".rela", 5, NULL, 0,
2218 { ".rel", 4, NULL, 0,
2220 { ".stab", 5, "str", 3,
2226 static const struct bfd_elf_special_section *
2227 get_special_section (const char *name,
2228 const struct bfd_elf_special_section *special_sections,
2233 for (i = 0; special_sections[i].prefix != NULL; i++)
2234 if (((special_sections[i].prefix_length
2235 && strncmp (name, special_sections[i].prefix,
2236 special_sections[i].prefix_length) == 0
2237 && (! special_sections[i].suffix_length
2238 || strcmp ((name + strlen (name)
2239 - special_sections[i].suffix_length),
2240 special_sections[i].suffix) == 0))
2241 || strcmp (name, special_sections[i].prefix) == 0)
2242 && (rela || special_sections[i].type != SHT_RELA))
2243 return &special_sections[i];
2249 _bfd_elf_get_sec_type_attr (bfd *abfd, const char *name,
2250 int *type, int *attr)
2252 bfd_boolean found = FALSE;
2253 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2255 /* See if this is one of the special sections. */
2258 const struct bfd_elf_special_section *ssect = NULL;
2259 unsigned int rela = get_elf_backend_data (abfd)->default_use_rela_p;
2261 if (bed->special_sections)
2262 ssect = get_special_section (name, bed->special_sections, rela);
2265 ssect = get_special_section (name, special_sections, rela);
2269 *type = ssect->type;
2270 *attr = ssect->attributes;
2279 _bfd_elf_new_section_hook (abfd, sec)
2283 struct bfd_elf_section_data *sdata;
2286 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2289 bfd_size_type amt = sizeof (*sdata);
2290 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, amt);
2293 sec->used_by_bfd = (PTR) sdata;
2296 if ((sec->flags & SEC_ALLOC) != 0
2297 && (((sec->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2298 || (sec->flags & SEC_NEVER_LOAD) != 0))
2299 elf_section_type (sec) = SHT_NOBITS;
2301 elf_section_type (sec) = SHT_PROGBITS;
2302 if (sec->name && _bfd_elf_get_sec_type_attr (abfd, sec->name,
2305 elf_section_type (sec) = type;
2306 elf_section_flags (sec) = attr;
2309 /* Indicate whether or not this section should use RELA relocations. */
2310 sec->use_rela_p = get_elf_backend_data (abfd)->default_use_rela_p;
2315 /* Create a new bfd section from an ELF program header.
2317 Since program segments have no names, we generate a synthetic name
2318 of the form segment<NUM>, where NUM is generally the index in the
2319 program header table. For segments that are split (see below) we
2320 generate the names segment<NUM>a and segment<NUM>b.
2322 Note that some program segments may have a file size that is different than
2323 (less than) the memory size. All this means is that at execution the
2324 system must allocate the amount of memory specified by the memory size,
2325 but only initialize it with the first "file size" bytes read from the
2326 file. This would occur for example, with program segments consisting
2327 of combined data+bss.
2329 To handle the above situation, this routine generates TWO bfd sections
2330 for the single program segment. The first has the length specified by
2331 the file size of the segment, and the second has the length specified
2332 by the difference between the two sizes. In effect, the segment is split
2333 into it's initialized and uninitialized parts.
2338 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
2340 Elf_Internal_Phdr *hdr;
2342 const char *typename;
2350 split = ((hdr->p_memsz > 0)
2351 && (hdr->p_filesz > 0)
2352 && (hdr->p_memsz > hdr->p_filesz));
2353 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2354 len = strlen (namebuf) + 1;
2355 name = bfd_alloc (abfd, (bfd_size_type) len);
2358 memcpy (name, namebuf, len);
2359 newsect = bfd_make_section (abfd, name);
2360 if (newsect == NULL)
2362 newsect->vma = hdr->p_vaddr;
2363 newsect->lma = hdr->p_paddr;
2364 newsect->_raw_size = hdr->p_filesz;
2365 newsect->filepos = hdr->p_offset;
2366 newsect->flags |= SEC_HAS_CONTENTS;
2367 if (hdr->p_type == PT_LOAD)
2369 newsect->flags |= SEC_ALLOC;
2370 newsect->flags |= SEC_LOAD;
2371 if (hdr->p_flags & PF_X)
2373 /* FIXME: all we known is that it has execute PERMISSION,
2375 newsect->flags |= SEC_CODE;
2378 if (!(hdr->p_flags & PF_W))
2380 newsect->flags |= SEC_READONLY;
2385 sprintf (namebuf, "%s%db", typename, index);
2386 len = strlen (namebuf) + 1;
2387 name = bfd_alloc (abfd, (bfd_size_type) len);
2390 memcpy (name, namebuf, len);
2391 newsect = bfd_make_section (abfd, name);
2392 if (newsect == NULL)
2394 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2395 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2396 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2397 if (hdr->p_type == PT_LOAD)
2399 newsect->flags |= SEC_ALLOC;
2400 if (hdr->p_flags & PF_X)
2401 newsect->flags |= SEC_CODE;
2403 if (!(hdr->p_flags & PF_W))
2404 newsect->flags |= SEC_READONLY;
2411 bfd_section_from_phdr (abfd, hdr, index)
2413 Elf_Internal_Phdr *hdr;
2416 struct elf_backend_data *bed;
2418 switch (hdr->p_type)
2421 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2424 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2427 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2430 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2433 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2435 if (! elfcore_read_notes (abfd, (file_ptr) hdr->p_offset, hdr->p_filesz))
2440 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2443 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2445 case PT_GNU_EH_FRAME:
2446 return _bfd_elf_make_section_from_phdr (abfd, hdr, index,
2450 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
2453 /* Check for any processor-specific program segment types.
2454 If no handler for them, default to making "segment" sections. */
2455 bed = get_elf_backend_data (abfd);
2456 if (bed->elf_backend_section_from_phdr)
2457 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2459 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2463 /* Initialize REL_HDR, the section-header for new section, containing
2464 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2465 relocations; otherwise, we use REL relocations. */
2468 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
2470 Elf_Internal_Shdr *rel_hdr;
2472 bfd_boolean use_rela_p;
2475 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2476 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2478 name = bfd_alloc (abfd, amt);
2481 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2483 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2485 if (rel_hdr->sh_name == (unsigned int) -1)
2487 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2488 rel_hdr->sh_entsize = (use_rela_p
2489 ? bed->s->sizeof_rela
2490 : bed->s->sizeof_rel);
2491 rel_hdr->sh_addralign = 1 << bed->s->log_file_align;
2492 rel_hdr->sh_flags = 0;
2493 rel_hdr->sh_addr = 0;
2494 rel_hdr->sh_size = 0;
2495 rel_hdr->sh_offset = 0;
2500 /* Set up an ELF internal section header for a section. */
2503 elf_fake_sections (abfd, asect, failedptrarg)
2508 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2509 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2510 Elf_Internal_Shdr *this_hdr;
2514 /* We already failed; just get out of the bfd_map_over_sections
2519 this_hdr = &elf_section_data (asect)->this_hdr;
2521 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2522 asect->name, FALSE);
2523 if (this_hdr->sh_name == (unsigned int) -1)
2529 this_hdr->sh_flags = 0;
2531 if ((asect->flags & SEC_ALLOC) != 0
2532 || asect->user_set_vma)
2533 this_hdr->sh_addr = asect->vma;
2535 this_hdr->sh_addr = 0;
2537 this_hdr->sh_offset = 0;
2538 this_hdr->sh_size = asect->_raw_size;
2539 this_hdr->sh_link = 0;
2540 this_hdr->sh_addralign = 1 << asect->alignment_power;
2541 /* The sh_entsize and sh_info fields may have been set already by
2542 copy_private_section_data. */
2544 this_hdr->bfd_section = asect;
2545 this_hdr->contents = NULL;
2547 switch (this_hdr->sh_type)
2550 (*_bfd_error_handler)
2551 (_("%s: Section `%s' has unknown type 0x%0x"),
2552 bfd_get_filename (asect->owner), asect->name,
2558 case SHT_INIT_ARRAY:
2559 case SHT_FINI_ARRAY:
2560 case SHT_PREINIT_ARRAY:
2567 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2571 this_hdr->sh_entsize = bed->s->sizeof_sym;
2575 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2579 if (get_elf_backend_data (abfd)->may_use_rela_p)
2580 this_hdr->sh_entsize = bed->s->sizeof_rela;
2584 if (get_elf_backend_data (abfd)->may_use_rel_p)
2585 this_hdr->sh_entsize = bed->s->sizeof_rel;
2588 case SHT_GNU_versym:
2589 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2592 case SHT_GNU_verdef:
2593 this_hdr->sh_entsize = 0;
2594 /* objcopy or strip will copy over sh_info, but may not set
2595 cverdefs. The linker will set cverdefs, but sh_info will be
2597 if (this_hdr->sh_info == 0)
2598 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2600 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2601 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2604 case SHT_GNU_verneed:
2605 this_hdr->sh_entsize = 0;
2606 /* objcopy or strip will copy over sh_info, but may not set
2607 cverrefs. The linker will set cverrefs, but sh_info will be
2609 if (this_hdr->sh_info == 0)
2610 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2612 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2613 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2617 this_hdr->sh_entsize = 4;
2621 if ((asect->flags & SEC_ALLOC) != 0)
2622 this_hdr->sh_flags |= SHF_ALLOC;
2623 if ((asect->flags & SEC_READONLY) == 0)
2624 this_hdr->sh_flags |= SHF_WRITE;
2625 if ((asect->flags & SEC_CODE) != 0)
2626 this_hdr->sh_flags |= SHF_EXECINSTR;
2627 if ((asect->flags & SEC_MERGE) != 0)
2629 this_hdr->sh_flags |= SHF_MERGE;
2630 this_hdr->sh_entsize = asect->entsize;
2631 if ((asect->flags & SEC_STRINGS) != 0)
2632 this_hdr->sh_flags |= SHF_STRINGS;
2634 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2635 this_hdr->sh_flags |= SHF_GROUP;
2636 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2638 this_hdr->sh_flags |= SHF_TLS;
2639 if (asect->_raw_size == 0 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2641 struct bfd_link_order *o;
2643 this_hdr->sh_size = 0;
2644 for (o = asect->link_order_head; o != NULL; o = o->next)
2645 if (this_hdr->sh_size < o->offset + o->size)
2646 this_hdr->sh_size = o->offset + o->size;
2647 if (this_hdr->sh_size)
2648 this_hdr->sh_type = SHT_NOBITS;
2652 /* Check for processor-specific section types. */
2653 if (bed->elf_backend_fake_sections
2654 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2657 /* If the section has relocs, set up a section header for the
2658 SHT_REL[A] section. If two relocation sections are required for
2659 this section, it is up to the processor-specific back-end to
2660 create the other. */
2661 if ((asect->flags & SEC_RELOC) != 0
2662 && !_bfd_elf_init_reloc_shdr (abfd,
2663 &elf_section_data (asect)->rel_hdr,
2669 /* Fill in the contents of a SHT_GROUP section. */
2672 bfd_elf_set_group_contents (abfd, sec, failedptrarg)
2677 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2678 unsigned long symindx;
2679 asection *elt, *first;
2681 struct bfd_link_order *l;
2684 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2689 if (elf_group_id (sec) != NULL)
2690 symindx = elf_group_id (sec)->udata.i;
2694 /* If called from the assembler, swap_out_syms will have set up
2695 elf_section_syms; If called for "ld -r", use target_index. */
2696 if (elf_section_syms (abfd) != NULL)
2697 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2699 symindx = sec->target_index;
2701 elf_section_data (sec)->this_hdr.sh_info = symindx;
2703 /* The contents won't be allocated for "ld -r" or objcopy. */
2705 if (sec->contents == NULL)
2708 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2710 /* Arrange for the section to be written out. */
2711 elf_section_data (sec)->this_hdr.contents = sec->contents;
2712 if (sec->contents == NULL)
2719 loc = sec->contents + sec->_raw_size;
2721 /* Get the pointer to the first section in the group that gas
2722 squirreled away here. objcopy arranges for this to be set to the
2723 start of the input section group. */
2724 first = elt = elf_next_in_group (sec);
2726 /* First element is a flag word. Rest of section is elf section
2727 indices for all the sections of the group. Write them backwards
2728 just to keep the group in the same order as given in .section
2729 directives, not that it matters. */
2738 s = s->output_section;
2741 idx = elf_section_data (s)->this_idx;
2742 H_PUT_32 (abfd, idx, loc);
2743 elt = elf_next_in_group (elt);
2748 /* If this is a relocatable link, then the above did nothing because
2749 SEC is the output section. Look through the input sections
2751 for (l = sec->link_order_head; l != NULL; l = l->next)
2752 if (l->type == bfd_indirect_link_order
2753 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2758 elf_section_data (elt->output_section)->this_idx, loc);
2759 elt = elf_next_in_group (elt);
2760 /* During a relocatable link, the lists are circular. */
2762 while (elt != elf_next_in_group (l->u.indirect.section));
2764 /* With ld -r, merging SHT_GROUP sections results in wasted space
2765 due to allowing for the flag word on each input. We may well
2766 duplicate entries too. */
2767 while ((loc -= 4) > sec->contents)
2768 H_PUT_32 (abfd, 0, loc);
2770 if (loc != sec->contents)
2773 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2776 /* Assign all ELF section numbers. The dummy first section is handled here
2777 too. The link/info pointers for the standard section types are filled
2778 in here too, while we're at it. */
2781 assign_section_numbers (abfd)
2784 struct elf_obj_tdata *t = elf_tdata (abfd);
2786 unsigned int section_number, secn;
2787 Elf_Internal_Shdr **i_shdrp;
2792 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2794 for (sec = abfd->sections; sec; sec = sec->next)
2796 struct bfd_elf_section_data *d = elf_section_data (sec);
2798 if (section_number == SHN_LORESERVE)
2799 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2800 d->this_idx = section_number++;
2801 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2802 if ((sec->flags & SEC_RELOC) == 0)
2806 if (section_number == SHN_LORESERVE)
2807 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2808 d->rel_idx = section_number++;
2809 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2814 if (section_number == SHN_LORESERVE)
2815 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2816 d->rel_idx2 = section_number++;
2817 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2823 if (section_number == SHN_LORESERVE)
2824 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2825 t->shstrtab_section = section_number++;
2826 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2827 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2829 if (bfd_get_symcount (abfd) > 0)
2831 if (section_number == SHN_LORESERVE)
2832 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2833 t->symtab_section = section_number++;
2834 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2835 if (section_number > SHN_LORESERVE - 2)
2837 if (section_number == SHN_LORESERVE)
2838 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2839 t->symtab_shndx_section = section_number++;
2840 t->symtab_shndx_hdr.sh_name
2841 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2842 ".symtab_shndx", FALSE);
2843 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2846 if (section_number == SHN_LORESERVE)
2847 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2848 t->strtab_section = section_number++;
2849 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2852 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2853 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2855 elf_numsections (abfd) = section_number;
2856 elf_elfheader (abfd)->e_shnum = section_number;
2857 if (section_number > SHN_LORESERVE)
2858 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2860 /* Set up the list of section header pointers, in agreement with the
2862 amt = section_number * sizeof (Elf_Internal_Shdr *);
2863 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc (abfd, amt);
2864 if (i_shdrp == NULL)
2867 amt = sizeof (Elf_Internal_Shdr);
2868 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd, amt);
2869 if (i_shdrp[0] == NULL)
2871 bfd_release (abfd, i_shdrp);
2875 elf_elfsections (abfd) = i_shdrp;
2877 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2878 if (bfd_get_symcount (abfd) > 0)
2880 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2881 if (elf_numsections (abfd) > SHN_LORESERVE)
2883 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2884 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2886 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2887 t->symtab_hdr.sh_link = t->strtab_section;
2889 for (sec = abfd->sections; sec; sec = sec->next)
2891 struct bfd_elf_section_data *d = elf_section_data (sec);
2895 i_shdrp[d->this_idx] = &d->this_hdr;
2896 if (d->rel_idx != 0)
2897 i_shdrp[d->rel_idx] = &d->rel_hdr;
2898 if (d->rel_idx2 != 0)
2899 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2901 /* Fill in the sh_link and sh_info fields while we're at it. */
2903 /* sh_link of a reloc section is the section index of the symbol
2904 table. sh_info is the section index of the section to which
2905 the relocation entries apply. */
2906 if (d->rel_idx != 0)
2908 d->rel_hdr.sh_link = t->symtab_section;
2909 d->rel_hdr.sh_info = d->this_idx;
2911 if (d->rel_idx2 != 0)
2913 d->rel_hdr2->sh_link = t->symtab_section;
2914 d->rel_hdr2->sh_info = d->this_idx;
2917 switch (d->this_hdr.sh_type)
2921 /* A reloc section which we are treating as a normal BFD
2922 section. sh_link is the section index of the symbol
2923 table. sh_info is the section index of the section to
2924 which the relocation entries apply. We assume that an
2925 allocated reloc section uses the dynamic symbol table.
2926 FIXME: How can we be sure? */
2927 s = bfd_get_section_by_name (abfd, ".dynsym");
2929 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2931 /* We look up the section the relocs apply to by name. */
2933 if (d->this_hdr.sh_type == SHT_REL)
2937 s = bfd_get_section_by_name (abfd, name);
2939 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2943 /* We assume that a section named .stab*str is a stabs
2944 string section. We look for a section with the same name
2945 but without the trailing ``str'', and set its sh_link
2946 field to point to this section. */
2947 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2948 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2953 len = strlen (sec->name);
2954 alc = (char *) bfd_malloc ((bfd_size_type) (len - 2));
2957 memcpy (alc, sec->name, len - 3);
2958 alc[len - 3] = '\0';
2959 s = bfd_get_section_by_name (abfd, alc);
2963 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2965 /* This is a .stab section. */
2966 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
2967 elf_section_data (s)->this_hdr.sh_entsize
2968 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
2975 case SHT_GNU_verneed:
2976 case SHT_GNU_verdef:
2977 /* sh_link is the section header index of the string table
2978 used for the dynamic entries, or the symbol table, or the
2980 s = bfd_get_section_by_name (abfd, ".dynstr");
2982 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2986 case SHT_GNU_versym:
2987 /* sh_link is the section header index of the symbol table
2988 this hash table or version table is for. */
2989 s = bfd_get_section_by_name (abfd, ".dynsym");
2991 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2995 d->this_hdr.sh_link = t->symtab_section;
2999 for (secn = 1; secn < section_number; ++secn)
3000 if (i_shdrp[secn] == NULL)
3001 i_shdrp[secn] = i_shdrp[0];
3003 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3004 i_shdrp[secn]->sh_name);
3008 /* Map symbol from it's internal number to the external number, moving
3009 all local symbols to be at the head of the list. */
3012 sym_is_global (abfd, sym)
3016 /* If the backend has a special mapping, use it. */
3017 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
3018 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
3021 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
3022 || bfd_is_und_section (bfd_get_section (sym))
3023 || bfd_is_com_section (bfd_get_section (sym)));
3027 elf_map_symbols (abfd)
3030 unsigned int symcount = bfd_get_symcount (abfd);
3031 asymbol **syms = bfd_get_outsymbols (abfd);
3032 asymbol **sect_syms;
3033 unsigned int num_locals = 0;
3034 unsigned int num_globals = 0;
3035 unsigned int num_locals2 = 0;
3036 unsigned int num_globals2 = 0;
3044 fprintf (stderr, "elf_map_symbols\n");
3048 for (asect = abfd->sections; asect; asect = asect->next)
3050 if (max_index < asect->index)
3051 max_index = asect->index;
3055 amt = max_index * sizeof (asymbol *);
3056 sect_syms = (asymbol **) bfd_zalloc (abfd, amt);
3057 if (sect_syms == NULL)
3059 elf_section_syms (abfd) = sect_syms;
3060 elf_num_section_syms (abfd) = max_index;
3062 /* Init sect_syms entries for any section symbols we have already
3063 decided to output. */
3064 for (idx = 0; idx < symcount; idx++)
3066 asymbol *sym = syms[idx];
3068 if ((sym->flags & BSF_SECTION_SYM) != 0
3075 if (sec->owner != NULL)
3077 if (sec->owner != abfd)
3079 if (sec->output_offset != 0)
3082 sec = sec->output_section;
3084 /* Empty sections in the input files may have had a
3085 section symbol created for them. (See the comment
3086 near the end of _bfd_generic_link_output_symbols in
3087 linker.c). If the linker script discards such
3088 sections then we will reach this point. Since we know
3089 that we cannot avoid this case, we detect it and skip
3090 the abort and the assignment to the sect_syms array.
3091 To reproduce this particular case try running the
3092 linker testsuite test ld-scripts/weak.exp for an ELF
3093 port that uses the generic linker. */
3094 if (sec->owner == NULL)
3097 BFD_ASSERT (sec->owner == abfd);
3099 sect_syms[sec->index] = syms[idx];
3104 /* Classify all of the symbols. */
3105 for (idx = 0; idx < symcount; idx++)
3107 if (!sym_is_global (abfd, syms[idx]))
3113 /* We will be adding a section symbol for each BFD section. Most normal
3114 sections will already have a section symbol in outsymbols, but
3115 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3116 at least in that case. */
3117 for (asect = abfd->sections; asect; asect = asect->next)
3119 if (sect_syms[asect->index] == NULL)
3121 if (!sym_is_global (abfd, asect->symbol))
3128 /* Now sort the symbols so the local symbols are first. */
3129 amt = (num_locals + num_globals) * sizeof (asymbol *);
3130 new_syms = (asymbol **) bfd_alloc (abfd, amt);
3132 if (new_syms == NULL)
3135 for (idx = 0; idx < symcount; idx++)
3137 asymbol *sym = syms[idx];
3140 if (!sym_is_global (abfd, sym))
3143 i = num_locals + num_globals2++;
3145 sym->udata.i = i + 1;
3147 for (asect = abfd->sections; asect; asect = asect->next)
3149 if (sect_syms[asect->index] == NULL)
3151 asymbol *sym = asect->symbol;
3154 sect_syms[asect->index] = sym;
3155 if (!sym_is_global (abfd, sym))
3158 i = num_locals + num_globals2++;
3160 sym->udata.i = i + 1;
3164 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3166 elf_num_locals (abfd) = num_locals;
3167 elf_num_globals (abfd) = num_globals;
3171 /* Align to the maximum file alignment that could be required for any
3172 ELF data structure. */
3174 static INLINE file_ptr align_file_position
3175 PARAMS ((file_ptr, int));
3176 static INLINE file_ptr
3177 align_file_position (off, align)
3181 return (off + align - 1) & ~(align - 1);
3184 /* Assign a file position to a section, optionally aligning to the
3185 required section alignment. */
3188 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
3189 Elf_Internal_Shdr *i_shdrp;
3197 al = i_shdrp->sh_addralign;
3199 offset = BFD_ALIGN (offset, al);
3201 i_shdrp->sh_offset = offset;
3202 if (i_shdrp->bfd_section != NULL)
3203 i_shdrp->bfd_section->filepos = offset;
3204 if (i_shdrp->sh_type != SHT_NOBITS)
3205 offset += i_shdrp->sh_size;
3209 /* Compute the file positions we are going to put the sections at, and
3210 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3211 is not NULL, this is being called by the ELF backend linker. */
3214 _bfd_elf_compute_section_file_positions (abfd, link_info)
3216 struct bfd_link_info *link_info;
3218 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3220 struct bfd_strtab_hash *strtab;
3221 Elf_Internal_Shdr *shstrtab_hdr;
3223 if (abfd->output_has_begun)
3226 /* Do any elf backend specific processing first. */
3227 if (bed->elf_backend_begin_write_processing)
3228 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3230 if (! prep_headers (abfd))
3233 /* Post process the headers if necessary. */
3234 if (bed->elf_backend_post_process_headers)
3235 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3238 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
3242 if (!assign_section_numbers (abfd))
3245 /* The backend linker builds symbol table information itself. */
3246 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3248 /* Non-zero if doing a relocatable link. */
3249 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3251 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3255 if (link_info == NULL)
3257 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3262 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3263 /* sh_name was set in prep_headers. */
3264 shstrtab_hdr->sh_type = SHT_STRTAB;
3265 shstrtab_hdr->sh_flags = 0;
3266 shstrtab_hdr->sh_addr = 0;
3267 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3268 shstrtab_hdr->sh_entsize = 0;
3269 shstrtab_hdr->sh_link = 0;
3270 shstrtab_hdr->sh_info = 0;
3271 /* sh_offset is set in assign_file_positions_except_relocs. */
3272 shstrtab_hdr->sh_addralign = 1;
3274 if (!assign_file_positions_except_relocs (abfd))
3277 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3280 Elf_Internal_Shdr *hdr;
3282 off = elf_tdata (abfd)->next_file_pos;
3284 hdr = &elf_tdata (abfd)->symtab_hdr;
3285 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3287 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3288 if (hdr->sh_size != 0)
3289 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3291 hdr = &elf_tdata (abfd)->strtab_hdr;
3292 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3294 elf_tdata (abfd)->next_file_pos = off;
3296 /* Now that we know where the .strtab section goes, write it
3298 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3299 || ! _bfd_stringtab_emit (abfd, strtab))
3301 _bfd_stringtab_free (strtab);
3304 abfd->output_has_begun = TRUE;
3309 /* Create a mapping from a set of sections to a program segment. */
3311 static INLINE struct elf_segment_map *
3312 make_mapping (abfd, sections, from, to, phdr)
3314 asection **sections;
3319 struct elf_segment_map *m;
3324 amt = sizeof (struct elf_segment_map);
3325 amt += (to - from - 1) * sizeof (asection *);
3326 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3330 m->p_type = PT_LOAD;
3331 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3332 m->sections[i - from] = *hdrpp;
3333 m->count = to - from;
3335 if (from == 0 && phdr)
3337 /* Include the headers in the first PT_LOAD segment. */
3338 m->includes_filehdr = 1;
3339 m->includes_phdrs = 1;
3345 /* Set up a mapping from BFD sections to program segments. */
3348 map_sections_to_segments (abfd)
3351 asection **sections = NULL;
3355 struct elf_segment_map *mfirst;
3356 struct elf_segment_map **pm;
3357 struct elf_segment_map *m;
3359 unsigned int phdr_index;
3360 bfd_vma maxpagesize;
3362 bfd_boolean phdr_in_segment = TRUE;
3363 bfd_boolean writable;
3365 asection *first_tls = NULL;
3366 asection *dynsec, *eh_frame_hdr;
3369 if (elf_tdata (abfd)->segment_map != NULL)
3372 if (bfd_count_sections (abfd) == 0)
3375 /* Select the allocated sections, and sort them. */
3377 amt = bfd_count_sections (abfd) * sizeof (asection *);
3378 sections = (asection **) bfd_malloc (amt);
3379 if (sections == NULL)
3383 for (s = abfd->sections; s != NULL; s = s->next)
3385 if ((s->flags & SEC_ALLOC) != 0)
3391 BFD_ASSERT (i <= bfd_count_sections (abfd));
3394 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3396 /* Build the mapping. */
3401 /* If we have a .interp section, then create a PT_PHDR segment for
3402 the program headers and a PT_INTERP segment for the .interp
3404 s = bfd_get_section_by_name (abfd, ".interp");
3405 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3407 amt = sizeof (struct elf_segment_map);
3408 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3412 m->p_type = PT_PHDR;
3413 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3414 m->p_flags = PF_R | PF_X;
3415 m->p_flags_valid = 1;
3416 m->includes_phdrs = 1;
3421 amt = sizeof (struct elf_segment_map);
3422 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3426 m->p_type = PT_INTERP;
3434 /* Look through the sections. We put sections in the same program
3435 segment when the start of the second section can be placed within
3436 a few bytes of the end of the first section. */
3439 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3441 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3443 && (dynsec->flags & SEC_LOAD) == 0)
3446 /* Deal with -Ttext or something similar such that the first section
3447 is not adjacent to the program headers. This is an
3448 approximation, since at this point we don't know exactly how many
3449 program headers we will need. */
3452 bfd_size_type phdr_size;
3454 phdr_size = elf_tdata (abfd)->program_header_size;
3456 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3457 if ((abfd->flags & D_PAGED) == 0
3458 || sections[0]->lma < phdr_size
3459 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3460 phdr_in_segment = FALSE;
3463 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3466 bfd_boolean new_segment;
3470 /* See if this section and the last one will fit in the same
3473 if (last_hdr == NULL)
3475 /* If we don't have a segment yet, then we don't need a new
3476 one (we build the last one after this loop). */
3477 new_segment = FALSE;
3479 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3481 /* If this section has a different relation between the
3482 virtual address and the load address, then we need a new
3486 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3487 < BFD_ALIGN (hdr->lma, maxpagesize))
3489 /* If putting this section in this segment would force us to
3490 skip a page in the segment, then we need a new segment. */
3493 else if ((last_hdr->flags & SEC_LOAD) == 0
3494 && (hdr->flags & SEC_LOAD) != 0)
3496 /* We don't want to put a loadable section after a
3497 nonloadable section in the same segment. */
3500 else if ((abfd->flags & D_PAGED) == 0)
3502 /* If the file is not demand paged, which means that we
3503 don't require the sections to be correctly aligned in the
3504 file, then there is no other reason for a new segment. */
3505 new_segment = FALSE;
3508 && (hdr->flags & SEC_READONLY) == 0
3509 && (((last_hdr->lma + last_hdr->_raw_size - 1)
3510 & ~(maxpagesize - 1))
3511 != (hdr->lma & ~(maxpagesize - 1))))
3513 /* We don't want to put a writable section in a read only
3514 segment, unless they are on the same page in memory
3515 anyhow. We already know that the last section does not
3516 bring us past the current section on the page, so the
3517 only case in which the new section is not on the same
3518 page as the previous section is when the previous section
3519 ends precisely on a page boundary. */
3524 /* Otherwise, we can use the same segment. */
3525 new_segment = FALSE;
3530 if ((hdr->flags & SEC_READONLY) == 0)
3536 /* We need a new program segment. We must create a new program
3537 header holding all the sections from phdr_index until hdr. */
3539 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3546 if ((hdr->flags & SEC_READONLY) == 0)
3553 phdr_in_segment = FALSE;
3556 /* Create a final PT_LOAD program segment. */
3557 if (last_hdr != NULL)
3559 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3567 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3570 amt = sizeof (struct elf_segment_map);
3571 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3575 m->p_type = PT_DYNAMIC;
3577 m->sections[0] = dynsec;
3583 /* For each loadable .note section, add a PT_NOTE segment. We don't
3584 use bfd_get_section_by_name, because if we link together
3585 nonloadable .note sections and loadable .note sections, we will
3586 generate two .note sections in the output file. FIXME: Using
3587 names for section types is bogus anyhow. */
3588 for (s = abfd->sections; s != NULL; s = s->next)
3590 if ((s->flags & SEC_LOAD) != 0
3591 && strncmp (s->name, ".note", 5) == 0)
3593 amt = sizeof (struct elf_segment_map);
3594 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3598 m->p_type = PT_NOTE;
3605 if (s->flags & SEC_THREAD_LOCAL)
3613 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3618 amt = sizeof (struct elf_segment_map);
3619 amt += (tls_count - 1) * sizeof (asection *);
3620 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3625 m->count = tls_count;
3626 /* Mandated PF_R. */
3628 m->p_flags_valid = 1;
3629 for (i = 0; i < tls_count; ++i)
3631 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3632 m->sections[i] = first_tls;
3633 first_tls = first_tls->next;
3640 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3642 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
3643 if (eh_frame_hdr != NULL
3644 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
3646 amt = sizeof (struct elf_segment_map);
3647 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3651 m->p_type = PT_GNU_EH_FRAME;
3653 m->sections[0] = eh_frame_hdr->output_section;
3659 if (elf_tdata (abfd)->stack_flags)
3661 amt = sizeof (struct elf_segment_map);
3662 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3666 m->p_type = PT_GNU_STACK;
3667 m->p_flags = elf_tdata (abfd)->stack_flags;
3668 m->p_flags_valid = 1;
3677 elf_tdata (abfd)->segment_map = mfirst;
3681 if (sections != NULL)
3686 /* Sort sections by address. */
3689 elf_sort_sections (arg1, arg2)
3693 const asection *sec1 = *(const asection **) arg1;
3694 const asection *sec2 = *(const asection **) arg2;
3695 bfd_size_type size1, size2;
3697 /* Sort by LMA first, since this is the address used to
3698 place the section into a segment. */
3699 if (sec1->lma < sec2->lma)
3701 else if (sec1->lma > sec2->lma)
3704 /* Then sort by VMA. Normally the LMA and the VMA will be
3705 the same, and this will do nothing. */
3706 if (sec1->vma < sec2->vma)
3708 else if (sec1->vma > sec2->vma)
3711 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3713 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3719 /* If the indicies are the same, do not return 0
3720 here, but continue to try the next comparison. */
3721 if (sec1->target_index - sec2->target_index != 0)
3722 return sec1->target_index - sec2->target_index;
3727 else if (TOEND (sec2))
3732 /* Sort by size, to put zero sized sections
3733 before others at the same address. */
3735 size1 = (sec1->flags & SEC_LOAD) ? sec1->_raw_size : 0;
3736 size2 = (sec2->flags & SEC_LOAD) ? sec2->_raw_size : 0;
3743 return sec1->target_index - sec2->target_index;
3746 /* Assign file positions to the sections based on the mapping from
3747 sections to segments. This function also sets up some fields in
3748 the file header, and writes out the program headers. */
3751 assign_file_positions_for_segments (abfd)
3754 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3756 struct elf_segment_map *m;
3758 Elf_Internal_Phdr *phdrs;
3760 bfd_vma filehdr_vaddr, filehdr_paddr;
3761 bfd_vma phdrs_vaddr, phdrs_paddr;
3762 Elf_Internal_Phdr *p;
3765 if (elf_tdata (abfd)->segment_map == NULL)
3767 if (! map_sections_to_segments (abfd))
3772 /* The placement algorithm assumes that non allocated sections are
3773 not in PT_LOAD segments. We ensure this here by removing such
3774 sections from the segment map. */
3775 for (m = elf_tdata (abfd)->segment_map;
3779 unsigned int new_count;
3782 if (m->p_type != PT_LOAD)
3786 for (i = 0; i < m->count; i ++)
3788 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3791 m->sections[new_count] = m->sections[i];
3797 if (new_count != m->count)
3798 m->count = new_count;
3802 if (bed->elf_backend_modify_segment_map)
3804 if (! (*bed->elf_backend_modify_segment_map) (abfd))
3809 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3812 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3813 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3814 elf_elfheader (abfd)->e_phnum = count;
3819 /* If we already counted the number of program segments, make sure
3820 that we allocated enough space. This happens when SIZEOF_HEADERS
3821 is used in a linker script. */
3822 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3823 if (alloc != 0 && count > alloc)
3825 ((*_bfd_error_handler)
3826 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3827 bfd_get_filename (abfd), alloc, count));
3828 bfd_set_error (bfd_error_bad_value);
3835 amt = alloc * sizeof (Elf_Internal_Phdr);
3836 phdrs = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
3840 off = bed->s->sizeof_ehdr;
3841 off += alloc * bed->s->sizeof_phdr;
3848 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3855 /* If elf_segment_map is not from map_sections_to_segments, the
3856 sections may not be correctly ordered. NOTE: sorting should
3857 not be done to the PT_NOTE section of a corefile, which may
3858 contain several pseudo-sections artificially created by bfd.
3859 Sorting these pseudo-sections breaks things badly. */
3861 && !(elf_elfheader (abfd)->e_type == ET_CORE
3862 && m->p_type == PT_NOTE))
3863 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3866 p->p_type = m->p_type;
3867 p->p_flags = m->p_flags;
3869 if (p->p_type == PT_LOAD
3871 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3873 if ((abfd->flags & D_PAGED) != 0)
3874 off += (m->sections[0]->vma - off) % bed->maxpagesize;
3877 bfd_size_type align;
3880 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3882 bfd_size_type secalign;
3884 secalign = bfd_get_section_alignment (abfd, *secpp);
3885 if (secalign > align)
3889 off += (m->sections[0]->vma - off) % (1 << align);
3896 p->p_vaddr = m->sections[0]->vma;
3898 if (m->p_paddr_valid)
3899 p->p_paddr = m->p_paddr;
3900 else if (m->count == 0)
3903 p->p_paddr = m->sections[0]->lma;
3905 if (p->p_type == PT_LOAD
3906 && (abfd->flags & D_PAGED) != 0)
3907 p->p_align = bed->maxpagesize;
3908 else if (m->count == 0)
3909 p->p_align = 1 << bed->s->log_file_align;
3917 if (m->includes_filehdr)
3919 if (! m->p_flags_valid)
3922 p->p_filesz = bed->s->sizeof_ehdr;
3923 p->p_memsz = bed->s->sizeof_ehdr;
3926 BFD_ASSERT (p->p_type == PT_LOAD);
3928 if (p->p_vaddr < (bfd_vma) off)
3930 (*_bfd_error_handler)
3931 (_("%s: Not enough room for program headers, try linking with -N"),
3932 bfd_get_filename (abfd));
3933 bfd_set_error (bfd_error_bad_value);
3938 if (! m->p_paddr_valid)
3941 if (p->p_type == PT_LOAD)
3943 filehdr_vaddr = p->p_vaddr;
3944 filehdr_paddr = p->p_paddr;
3948 if (m->includes_phdrs)
3950 if (! m->p_flags_valid)
3953 if (m->includes_filehdr)
3955 if (p->p_type == PT_LOAD)
3957 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3958 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3963 p->p_offset = bed->s->sizeof_ehdr;
3967 BFD_ASSERT (p->p_type == PT_LOAD);
3968 p->p_vaddr -= off - p->p_offset;
3969 if (! m->p_paddr_valid)
3970 p->p_paddr -= off - p->p_offset;
3973 if (p->p_type == PT_LOAD)
3975 phdrs_vaddr = p->p_vaddr;
3976 phdrs_paddr = p->p_paddr;
3979 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3982 p->p_filesz += alloc * bed->s->sizeof_phdr;
3983 p->p_memsz += alloc * bed->s->sizeof_phdr;
3986 if (p->p_type == PT_LOAD
3987 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3989 if (! m->includes_filehdr && ! m->includes_phdrs)
3995 adjust = off - (p->p_offset + p->p_filesz);
3996 p->p_filesz += adjust;
3997 p->p_memsz += adjust;
4003 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4007 bfd_size_type align;
4011 align = 1 << bfd_get_section_alignment (abfd, sec);
4013 /* The section may have artificial alignment forced by a
4014 link script. Notice this case by the gap between the
4015 cumulative phdr lma and the section's lma. */
4016 if (p->p_paddr + p->p_memsz < sec->lma)
4018 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
4020 p->p_memsz += adjust;
4021 if (p->p_type == PT_LOAD
4022 || (p->p_type == PT_NOTE
4023 && bfd_get_format (abfd) == bfd_core))
4028 if ((flags & SEC_LOAD) != 0
4029 || (flags & SEC_THREAD_LOCAL) != 0)
4030 p->p_filesz += adjust;
4033 if (p->p_type == PT_LOAD)
4035 bfd_signed_vma adjust;
4037 if ((flags & SEC_LOAD) != 0)
4039 adjust = sec->lma - (p->p_paddr + p->p_memsz);
4043 else if ((flags & SEC_ALLOC) != 0)
4045 /* The section VMA must equal the file position
4046 modulo the page size. FIXME: I'm not sure if
4047 this adjustment is really necessary. We used to
4048 not have the SEC_LOAD case just above, and then
4049 this was necessary, but now I'm not sure. */
4050 if ((abfd->flags & D_PAGED) != 0)
4051 adjust = (sec->vma - voff) % bed->maxpagesize;
4053 adjust = (sec->vma - voff) % align;
4062 (* _bfd_error_handler) (_("\
4063 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
4064 bfd_section_name (abfd, sec),
4069 p->p_memsz += adjust;
4072 if ((flags & SEC_LOAD) != 0)
4073 p->p_filesz += adjust;
4078 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
4079 used in a linker script we may have a section with
4080 SEC_LOAD clear but which is supposed to have
4082 if ((flags & SEC_LOAD) != 0
4083 || (flags & SEC_HAS_CONTENTS) != 0)
4084 off += sec->_raw_size;
4086 if ((flags & SEC_ALLOC) != 0
4087 && ((flags & SEC_LOAD) != 0
4088 || (flags & SEC_THREAD_LOCAL) == 0))
4089 voff += sec->_raw_size;
4092 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4094 /* The actual "note" segment has i == 0.
4095 This is the one that actually contains everything. */
4099 p->p_filesz = sec->_raw_size;
4100 off += sec->_raw_size;
4105 /* Fake sections -- don't need to be written. */
4108 flags = sec->flags = 0;
4115 if ((sec->flags & SEC_LOAD) != 0
4116 || (sec->flags & SEC_THREAD_LOCAL) == 0
4117 || p->p_type == PT_TLS)
4118 p->p_memsz += sec->_raw_size;
4120 if ((flags & SEC_LOAD) != 0)
4121 p->p_filesz += sec->_raw_size;
4123 if (p->p_type == PT_TLS
4124 && sec->_raw_size == 0
4125 && (sec->flags & SEC_HAS_CONTENTS) == 0)
4127 struct bfd_link_order *o;
4128 bfd_vma tbss_size = 0;
4130 for (o = sec->link_order_head; o != NULL; o = o->next)
4131 if (tbss_size < o->offset + o->size)
4132 tbss_size = o->offset + o->size;
4134 p->p_memsz += tbss_size;
4137 if (align > p->p_align
4138 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
4142 if (! m->p_flags_valid)
4145 if ((flags & SEC_CODE) != 0)
4147 if ((flags & SEC_READONLY) == 0)
4153 /* Now that we have set the section file positions, we can set up
4154 the file positions for the non PT_LOAD segments. */
4155 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4159 if (p->p_type != PT_LOAD && m->count > 0)
4161 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
4162 p->p_offset = m->sections[0]->filepos;
4166 if (m->includes_filehdr)
4168 p->p_vaddr = filehdr_vaddr;
4169 if (! m->p_paddr_valid)
4170 p->p_paddr = filehdr_paddr;
4172 else if (m->includes_phdrs)
4174 p->p_vaddr = phdrs_vaddr;
4175 if (! m->p_paddr_valid)
4176 p->p_paddr = phdrs_paddr;
4181 /* Clear out any program headers we allocated but did not use. */
4182 for (; count < alloc; count++, p++)
4184 memset (p, 0, sizeof *p);
4185 p->p_type = PT_NULL;
4188 elf_tdata (abfd)->phdr = phdrs;
4190 elf_tdata (abfd)->next_file_pos = off;
4192 /* Write out the program headers. */
4193 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
4194 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
4200 /* Get the size of the program header.
4202 If this is called by the linker before any of the section VMA's are set, it
4203 can't calculate the correct value for a strange memory layout. This only
4204 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4205 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4206 data segment (exclusive of .interp and .dynamic).
4208 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4209 will be two segments. */
4211 static bfd_size_type
4212 get_program_header_size (abfd)
4217 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4219 /* We can't return a different result each time we're called. */
4220 if (elf_tdata (abfd)->program_header_size != 0)
4221 return elf_tdata (abfd)->program_header_size;
4223 if (elf_tdata (abfd)->segment_map != NULL)
4225 struct elf_segment_map *m;
4228 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4230 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4231 return elf_tdata (abfd)->program_header_size;
4234 /* Assume we will need exactly two PT_LOAD segments: one for text
4235 and one for data. */
4238 s = bfd_get_section_by_name (abfd, ".interp");
4239 if (s != NULL && (s->flags & SEC_LOAD) != 0)
4241 /* If we have a loadable interpreter section, we need a
4242 PT_INTERP segment. In this case, assume we also need a
4243 PT_PHDR segment, although that may not be true for all
4248 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
4250 /* We need a PT_DYNAMIC segment. */
4254 if (elf_tdata (abfd)->eh_frame_hdr)
4256 /* We need a PT_GNU_EH_FRAME segment. */
4260 if (elf_tdata (abfd)->stack_flags)
4262 /* We need a PT_GNU_STACK segment. */
4266 for (s = abfd->sections; s != NULL; s = s->next)
4268 if ((s->flags & SEC_LOAD) != 0
4269 && strncmp (s->name, ".note", 5) == 0)
4271 /* We need a PT_NOTE segment. */
4276 for (s = abfd->sections; s != NULL; s = s->next)
4278 if (s->flags & SEC_THREAD_LOCAL)
4280 /* We need a PT_TLS segment. */
4286 /* Let the backend count up any program headers it might need. */
4287 if (bed->elf_backend_additional_program_headers)
4291 a = (*bed->elf_backend_additional_program_headers) (abfd);
4297 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4298 return elf_tdata (abfd)->program_header_size;
4301 /* Work out the file positions of all the sections. This is called by
4302 _bfd_elf_compute_section_file_positions. All the section sizes and
4303 VMAs must be known before this is called.
4305 We do not consider reloc sections at this point, unless they form
4306 part of the loadable image. Reloc sections are assigned file
4307 positions in assign_file_positions_for_relocs, which is called by
4308 write_object_contents and final_link.
4310 We also don't set the positions of the .symtab and .strtab here. */
4313 assign_file_positions_except_relocs (abfd)
4316 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4317 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4318 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4319 unsigned int num_sec = elf_numsections (abfd);
4321 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4323 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4324 && bfd_get_format (abfd) != bfd_core)
4326 Elf_Internal_Shdr **hdrpp;
4329 /* Start after the ELF header. */
4330 off = i_ehdrp->e_ehsize;
4332 /* We are not creating an executable, which means that we are
4333 not creating a program header, and that the actual order of
4334 the sections in the file is unimportant. */
4335 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4337 Elf_Internal_Shdr *hdr;
4340 if (hdr->sh_type == SHT_REL
4341 || hdr->sh_type == SHT_RELA
4342 || i == tdata->symtab_section
4343 || i == tdata->symtab_shndx_section
4344 || i == tdata->strtab_section)
4346 hdr->sh_offset = -1;
4349 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4351 if (i == SHN_LORESERVE - 1)
4353 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4354 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4361 Elf_Internal_Shdr **hdrpp;
4363 /* Assign file positions for the loaded sections based on the
4364 assignment of sections to segments. */
4365 if (! assign_file_positions_for_segments (abfd))
4368 /* Assign file positions for the other sections. */
4370 off = elf_tdata (abfd)->next_file_pos;
4371 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4373 Elf_Internal_Shdr *hdr;
4376 if (hdr->bfd_section != NULL
4377 && hdr->bfd_section->filepos != 0)
4378 hdr->sh_offset = hdr->bfd_section->filepos;
4379 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4381 ((*_bfd_error_handler)
4382 (_("%s: warning: allocated section `%s' not in segment"),
4383 bfd_get_filename (abfd),
4384 (hdr->bfd_section == NULL
4386 : hdr->bfd_section->name)));
4387 if ((abfd->flags & D_PAGED) != 0)
4388 off += (hdr->sh_addr - off) % bed->maxpagesize;
4390 off += (hdr->sh_addr - off) % hdr->sh_addralign;
4391 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4394 else if (hdr->sh_type == SHT_REL
4395 || hdr->sh_type == SHT_RELA
4396 || hdr == i_shdrpp[tdata->symtab_section]
4397 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4398 || hdr == i_shdrpp[tdata->strtab_section])
4399 hdr->sh_offset = -1;
4401 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4403 if (i == SHN_LORESERVE - 1)
4405 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4406 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4411 /* Place the section headers. */
4412 off = align_file_position (off, 1 << bed->s->log_file_align);
4413 i_ehdrp->e_shoff = off;
4414 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4416 elf_tdata (abfd)->next_file_pos = off;
4425 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4426 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4427 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4428 struct elf_strtab_hash *shstrtab;
4429 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4431 i_ehdrp = elf_elfheader (abfd);
4432 i_shdrp = elf_elfsections (abfd);
4434 shstrtab = _bfd_elf_strtab_init ();
4435 if (shstrtab == NULL)
4438 elf_shstrtab (abfd) = shstrtab;
4440 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4441 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4442 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4443 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4445 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4446 i_ehdrp->e_ident[EI_DATA] =
4447 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4448 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4450 if ((abfd->flags & DYNAMIC) != 0)
4451 i_ehdrp->e_type = ET_DYN;
4452 else if ((abfd->flags & EXEC_P) != 0)
4453 i_ehdrp->e_type = ET_EXEC;
4454 else if (bfd_get_format (abfd) == bfd_core)
4455 i_ehdrp->e_type = ET_CORE;
4457 i_ehdrp->e_type = ET_REL;
4459 switch (bfd_get_arch (abfd))
4461 case bfd_arch_unknown:
4462 i_ehdrp->e_machine = EM_NONE;
4465 /* There used to be a long list of cases here, each one setting
4466 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4467 in the corresponding bfd definition. To avoid duplication,
4468 the switch was removed. Machines that need special handling
4469 can generally do it in elf_backend_final_write_processing(),
4470 unless they need the information earlier than the final write.
4471 Such need can generally be supplied by replacing the tests for
4472 e_machine with the conditions used to determine it. */
4474 if (get_elf_backend_data (abfd) != NULL)
4475 i_ehdrp->e_machine = get_elf_backend_data (abfd)->elf_machine_code;
4477 i_ehdrp->e_machine = EM_NONE;
4480 i_ehdrp->e_version = bed->s->ev_current;
4481 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4483 /* No program header, for now. */
4484 i_ehdrp->e_phoff = 0;
4485 i_ehdrp->e_phentsize = 0;
4486 i_ehdrp->e_phnum = 0;
4488 /* Each bfd section is section header entry. */
4489 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4490 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4492 /* If we're building an executable, we'll need a program header table. */
4493 if (abfd->flags & EXEC_P)
4495 /* It all happens later. */
4497 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4499 /* elf_build_phdrs() returns a (NULL-terminated) array of
4500 Elf_Internal_Phdrs. */
4501 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4502 i_ehdrp->e_phoff = outbase;
4503 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4508 i_ehdrp->e_phentsize = 0;
4510 i_ehdrp->e_phoff = 0;
4513 elf_tdata (abfd)->symtab_hdr.sh_name =
4514 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
4515 elf_tdata (abfd)->strtab_hdr.sh_name =
4516 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
4517 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4518 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
4519 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4520 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4521 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4527 /* Assign file positions for all the reloc sections which are not part
4528 of the loadable file image. */
4531 _bfd_elf_assign_file_positions_for_relocs (abfd)
4535 unsigned int i, num_sec;
4536 Elf_Internal_Shdr **shdrpp;
4538 off = elf_tdata (abfd)->next_file_pos;
4540 num_sec = elf_numsections (abfd);
4541 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4543 Elf_Internal_Shdr *shdrp;
4546 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4547 && shdrp->sh_offset == -1)
4548 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
4551 elf_tdata (abfd)->next_file_pos = off;
4555 _bfd_elf_write_object_contents (abfd)
4558 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4559 Elf_Internal_Ehdr *i_ehdrp;
4560 Elf_Internal_Shdr **i_shdrp;
4562 unsigned int count, num_sec;
4564 if (! abfd->output_has_begun
4565 && ! _bfd_elf_compute_section_file_positions
4566 (abfd, (struct bfd_link_info *) NULL))
4569 i_shdrp = elf_elfsections (abfd);
4570 i_ehdrp = elf_elfheader (abfd);
4573 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4577 _bfd_elf_assign_file_positions_for_relocs (abfd);
4579 /* After writing the headers, we need to write the sections too... */
4580 num_sec = elf_numsections (abfd);
4581 for (count = 1; count < num_sec; count++)
4583 if (bed->elf_backend_section_processing)
4584 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4585 if (i_shdrp[count]->contents)
4587 bfd_size_type amt = i_shdrp[count]->sh_size;
4589 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4590 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4593 if (count == SHN_LORESERVE - 1)
4594 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4597 /* Write out the section header names. */
4598 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4599 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4602 if (bed->elf_backend_final_write_processing)
4603 (*bed->elf_backend_final_write_processing) (abfd,
4604 elf_tdata (abfd)->linker);
4606 return bed->s->write_shdrs_and_ehdr (abfd);
4610 _bfd_elf_write_corefile_contents (abfd)
4613 /* Hopefully this can be done just like an object file. */
4614 return _bfd_elf_write_object_contents (abfd);
4617 /* Given a section, search the header to find them. */
4620 _bfd_elf_section_from_bfd_section (abfd, asect)
4624 struct elf_backend_data *bed;
4627 if (elf_section_data (asect) != NULL
4628 && elf_section_data (asect)->this_idx != 0)
4629 return elf_section_data (asect)->this_idx;
4631 if (bfd_is_abs_section (asect))
4633 else if (bfd_is_com_section (asect))
4635 else if (bfd_is_und_section (asect))
4639 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4640 int maxindex = elf_numsections (abfd);
4642 for (index = 1; index < maxindex; index++)
4644 Elf_Internal_Shdr *hdr = i_shdrp[index];
4646 if (hdr != NULL && hdr->bfd_section == asect)
4652 bed = get_elf_backend_data (abfd);
4653 if (bed->elf_backend_section_from_bfd_section)
4657 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4662 bfd_set_error (bfd_error_nonrepresentable_section);
4667 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4671 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
4673 asymbol **asym_ptr_ptr;
4675 asymbol *asym_ptr = *asym_ptr_ptr;
4677 flagword flags = asym_ptr->flags;
4679 /* When gas creates relocations against local labels, it creates its
4680 own symbol for the section, but does put the symbol into the
4681 symbol chain, so udata is 0. When the linker is generating
4682 relocatable output, this section symbol may be for one of the
4683 input sections rather than the output section. */
4684 if (asym_ptr->udata.i == 0
4685 && (flags & BSF_SECTION_SYM)
4686 && asym_ptr->section)
4690 if (asym_ptr->section->output_section != NULL)
4691 indx = asym_ptr->section->output_section->index;
4693 indx = asym_ptr->section->index;
4694 if (indx < elf_num_section_syms (abfd)
4695 && elf_section_syms (abfd)[indx] != NULL)
4696 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4699 idx = asym_ptr->udata.i;
4703 /* This case can occur when using --strip-symbol on a symbol
4704 which is used in a relocation entry. */
4705 (*_bfd_error_handler)
4706 (_("%s: symbol `%s' required but not present"),
4707 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4708 bfd_set_error (bfd_error_no_symbols);
4715 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4716 (long) asym_ptr, asym_ptr->name, idx, flags,
4717 elf_symbol_flags (flags));
4725 /* Copy private BFD data. This copies any program header information. */
4728 copy_private_bfd_data (ibfd, obfd)
4732 Elf_Internal_Ehdr *iehdr;
4733 struct elf_segment_map *map;
4734 struct elf_segment_map *map_first;
4735 struct elf_segment_map **pointer_to_map;
4736 Elf_Internal_Phdr *segment;
4739 unsigned int num_segments;
4740 bfd_boolean phdr_included = FALSE;
4741 bfd_vma maxpagesize;
4742 struct elf_segment_map *phdr_adjust_seg = NULL;
4743 unsigned int phdr_adjust_num = 0;
4744 struct elf_backend_data *bed;
4746 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4747 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4750 if (elf_tdata (ibfd)->phdr == NULL)
4753 bed = get_elf_backend_data (ibfd);
4754 iehdr = elf_elfheader (ibfd);
4757 pointer_to_map = &map_first;
4759 num_segments = elf_elfheader (ibfd)->e_phnum;
4760 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4762 /* Returns the end address of the segment + 1. */
4763 #define SEGMENT_END(segment, start) \
4764 (start + (segment->p_memsz > segment->p_filesz \
4765 ? segment->p_memsz : segment->p_filesz))
4767 #define SECTION_SIZE(section, segment) \
4768 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
4769 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
4770 ? section->_raw_size : 0)
4772 /* Returns TRUE if the given section is contained within
4773 the given segment. VMA addresses are compared. */
4774 #define IS_CONTAINED_BY_VMA(section, segment) \
4775 (section->vma >= segment->p_vaddr \
4776 && (section->vma + SECTION_SIZE (section, segment) \
4777 <= (SEGMENT_END (segment, segment->p_vaddr))))
4779 /* Returns TRUE if the given section is contained within
4780 the given segment. LMA addresses are compared. */
4781 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4782 (section->lma >= base \
4783 && (section->lma + SECTION_SIZE (section, segment) \
4784 <= SEGMENT_END (segment, base)))
4786 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4787 #define IS_COREFILE_NOTE(p, s) \
4788 (p->p_type == PT_NOTE \
4789 && bfd_get_format (ibfd) == bfd_core \
4790 && s->vma == 0 && s->lma == 0 \
4791 && (bfd_vma) s->filepos >= p->p_offset \
4792 && ((bfd_vma) s->filepos + s->_raw_size \
4793 <= p->p_offset + p->p_filesz))
4795 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4796 linker, which generates a PT_INTERP section with p_vaddr and
4797 p_memsz set to 0. */
4798 #define IS_SOLARIS_PT_INTERP(p, s) \
4800 && p->p_paddr == 0 \
4801 && p->p_memsz == 0 \
4802 && p->p_filesz > 0 \
4803 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4804 && s->_raw_size > 0 \
4805 && (bfd_vma) s->filepos >= p->p_offset \
4806 && ((bfd_vma) s->filepos + s->_raw_size \
4807 <= p->p_offset + p->p_filesz))
4809 /* Decide if the given section should be included in the given segment.
4810 A section will be included if:
4811 1. It is within the address space of the segment -- we use the LMA
4812 if that is set for the segment and the VMA otherwise,
4813 2. It is an allocated segment,
4814 3. There is an output section associated with it,
4815 4. The section has not already been allocated to a previous segment.
4816 5. PT_TLS segment includes only SHF_TLS sections.
4817 6. SHF_TLS sections are only in PT_TLS or PT_LOAD segments. */
4818 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4819 ((((segment->p_paddr \
4820 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4821 : IS_CONTAINED_BY_VMA (section, segment)) \
4822 && (section->flags & SEC_ALLOC) != 0) \
4823 || IS_COREFILE_NOTE (segment, section)) \
4824 && section->output_section != NULL \
4825 && (segment->p_type != PT_TLS \
4826 || (section->flags & SEC_THREAD_LOCAL)) \
4827 && (segment->p_type == PT_LOAD \
4828 || segment->p_type == PT_TLS \
4829 || (section->flags & SEC_THREAD_LOCAL) == 0) \
4830 && ! section->segment_mark)
4832 /* Returns TRUE iff seg1 starts after the end of seg2. */
4833 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
4834 (seg1->field >= SEGMENT_END (seg2, seg2->field))
4836 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
4837 their VMA address ranges and their LMA address ranges overlap.
4838 It is possible to have overlapping VMA ranges without overlapping LMA
4839 ranges. RedBoot images for example can have both .data and .bss mapped
4840 to the same VMA range, but with the .data section mapped to a different
4842 #define SEGMENT_OVERLAPS(seg1, seg2) \
4843 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
4844 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
4845 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
4846 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
4848 /* Initialise the segment mark field. */
4849 for (section = ibfd->sections; section != NULL; section = section->next)
4850 section->segment_mark = FALSE;
4852 /* Scan through the segments specified in the program header
4853 of the input BFD. For this first scan we look for overlaps
4854 in the loadable segments. These can be created by weird
4855 parameters to objcopy. Also, fix some solaris weirdness. */
4856 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4861 Elf_Internal_Phdr *segment2;
4863 if (segment->p_type == PT_INTERP)
4864 for (section = ibfd->sections; section; section = section->next)
4865 if (IS_SOLARIS_PT_INTERP (segment, section))
4867 /* Mininal change so that the normal section to segment
4868 assigment code will work. */
4869 segment->p_vaddr = section->vma;
4873 if (segment->p_type != PT_LOAD)
4876 /* Determine if this segment overlaps any previous segments. */
4877 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4879 bfd_signed_vma extra_length;
4881 if (segment2->p_type != PT_LOAD
4882 || ! SEGMENT_OVERLAPS (segment, segment2))
4885 /* Merge the two segments together. */
4886 if (segment2->p_vaddr < segment->p_vaddr)
4888 /* Extend SEGMENT2 to include SEGMENT and then delete
4891 SEGMENT_END (segment, segment->p_vaddr)
4892 - SEGMENT_END (segment2, segment2->p_vaddr);
4894 if (extra_length > 0)
4896 segment2->p_memsz += extra_length;
4897 segment2->p_filesz += extra_length;
4900 segment->p_type = PT_NULL;
4902 /* Since we have deleted P we must restart the outer loop. */
4904 segment = elf_tdata (ibfd)->phdr;
4909 /* Extend SEGMENT to include SEGMENT2 and then delete
4912 SEGMENT_END (segment2, segment2->p_vaddr)
4913 - SEGMENT_END (segment, segment->p_vaddr);
4915 if (extra_length > 0)
4917 segment->p_memsz += extra_length;
4918 segment->p_filesz += extra_length;
4921 segment2->p_type = PT_NULL;
4926 /* The second scan attempts to assign sections to segments. */
4927 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4931 unsigned int section_count;
4932 asection ** sections;
4933 asection * output_section;
4935 bfd_vma matching_lma;
4936 bfd_vma suggested_lma;
4940 if (segment->p_type == PT_NULL)
4943 /* Compute how many sections might be placed into this segment. */
4944 for (section = ibfd->sections, section_count = 0;
4946 section = section->next)
4947 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4950 /* Allocate a segment map big enough to contain
4951 all of the sections we have selected. */
4952 amt = sizeof (struct elf_segment_map);
4953 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4954 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4958 /* Initialise the fields of the segment map. Default to
4959 using the physical address of the segment in the input BFD. */
4961 map->p_type = segment->p_type;
4962 map->p_flags = segment->p_flags;
4963 map->p_flags_valid = 1;
4964 map->p_paddr = segment->p_paddr;
4965 map->p_paddr_valid = 1;
4967 /* Determine if this segment contains the ELF file header
4968 and if it contains the program headers themselves. */
4969 map->includes_filehdr = (segment->p_offset == 0
4970 && segment->p_filesz >= iehdr->e_ehsize);
4972 map->includes_phdrs = 0;
4974 if (! phdr_included || segment->p_type != PT_LOAD)
4976 map->includes_phdrs =
4977 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4978 && (segment->p_offset + segment->p_filesz
4979 >= ((bfd_vma) iehdr->e_phoff
4980 + iehdr->e_phnum * iehdr->e_phentsize)));
4982 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4983 phdr_included = TRUE;
4986 if (section_count == 0)
4988 /* Special segments, such as the PT_PHDR segment, may contain
4989 no sections, but ordinary, loadable segments should contain
4990 something. They are allowed by the ELF spec however, so only
4991 a warning is produced. */
4992 if (segment->p_type == PT_LOAD)
4993 (*_bfd_error_handler)
4994 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4995 bfd_archive_filename (ibfd));
4998 *pointer_to_map = map;
4999 pointer_to_map = &map->next;
5004 /* Now scan the sections in the input BFD again and attempt
5005 to add their corresponding output sections to the segment map.
5006 The problem here is how to handle an output section which has
5007 been moved (ie had its LMA changed). There are four possibilities:
5009 1. None of the sections have been moved.
5010 In this case we can continue to use the segment LMA from the
5013 2. All of the sections have been moved by the same amount.
5014 In this case we can change the segment's LMA to match the LMA
5015 of the first section.
5017 3. Some of the sections have been moved, others have not.
5018 In this case those sections which have not been moved can be
5019 placed in the current segment which will have to have its size,
5020 and possibly its LMA changed, and a new segment or segments will
5021 have to be created to contain the other sections.
5023 4. The sections have been moved, but not by the same amount.
5024 In this case we can change the segment's LMA to match the LMA
5025 of the first section and we will have to create a new segment
5026 or segments to contain the other sections.
5028 In order to save time, we allocate an array to hold the section
5029 pointers that we are interested in. As these sections get assigned
5030 to a segment, they are removed from this array. */
5032 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5033 to work around this long long bug. */
5034 amt = section_count * sizeof (asection *);
5035 sections = (asection **) bfd_malloc (amt);
5036 if (sections == NULL)
5039 /* Step One: Scan for segment vs section LMA conflicts.
5040 Also add the sections to the section array allocated above.
5041 Also add the sections to the current segment. In the common
5042 case, where the sections have not been moved, this means that
5043 we have completely filled the segment, and there is nothing
5049 for (j = 0, section = ibfd->sections;
5051 section = section->next)
5053 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5055 output_section = section->output_section;
5057 sections[j ++] = section;
5059 /* The Solaris native linker always sets p_paddr to 0.
5060 We try to catch that case here, and set it to the
5061 correct value. Note - some backends require that
5062 p_paddr be left as zero. */
5063 if (segment->p_paddr == 0
5064 && segment->p_vaddr != 0
5065 && (! bed->want_p_paddr_set_to_zero)
5067 && output_section->lma != 0
5068 && (output_section->vma == (segment->p_vaddr
5069 + (map->includes_filehdr
5072 + (map->includes_phdrs
5074 * iehdr->e_phentsize)
5076 map->p_paddr = segment->p_vaddr;
5078 /* Match up the physical address of the segment with the
5079 LMA address of the output section. */
5080 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5081 || IS_COREFILE_NOTE (segment, section)
5082 || (bed->want_p_paddr_set_to_zero &&
5083 IS_CONTAINED_BY_VMA (output_section, segment))
5086 if (matching_lma == 0)
5087 matching_lma = output_section->lma;
5089 /* We assume that if the section fits within the segment
5090 then it does not overlap any other section within that
5092 map->sections[isec ++] = output_section;
5094 else if (suggested_lma == 0)
5095 suggested_lma = output_section->lma;
5099 BFD_ASSERT (j == section_count);
5101 /* Step Two: Adjust the physical address of the current segment,
5103 if (isec == section_count)
5105 /* All of the sections fitted within the segment as currently
5106 specified. This is the default case. Add the segment to
5107 the list of built segments and carry on to process the next
5108 program header in the input BFD. */
5109 map->count = section_count;
5110 *pointer_to_map = map;
5111 pointer_to_map = &map->next;
5118 if (matching_lma != 0)
5120 /* At least one section fits inside the current segment.
5121 Keep it, but modify its physical address to match the
5122 LMA of the first section that fitted. */
5123 map->p_paddr = matching_lma;
5127 /* None of the sections fitted inside the current segment.
5128 Change the current segment's physical address to match
5129 the LMA of the first section. */
5130 map->p_paddr = suggested_lma;
5133 /* Offset the segment physical address from the lma
5134 to allow for space taken up by elf headers. */
5135 if (map->includes_filehdr)
5136 map->p_paddr -= iehdr->e_ehsize;
5138 if (map->includes_phdrs)
5140 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5142 /* iehdr->e_phnum is just an estimate of the number
5143 of program headers that we will need. Make a note
5144 here of the number we used and the segment we chose
5145 to hold these headers, so that we can adjust the
5146 offset when we know the correct value. */
5147 phdr_adjust_num = iehdr->e_phnum;
5148 phdr_adjust_seg = map;
5152 /* Step Three: Loop over the sections again, this time assigning
5153 those that fit to the current segment and removing them from the
5154 sections array; but making sure not to leave large gaps. Once all
5155 possible sections have been assigned to the current segment it is
5156 added to the list of built segments and if sections still remain
5157 to be assigned, a new segment is constructed before repeating
5165 /* Fill the current segment with sections that fit. */
5166 for (j = 0; j < section_count; j++)
5168 section = sections[j];
5170 if (section == NULL)
5173 output_section = section->output_section;
5175 BFD_ASSERT (output_section != NULL);
5177 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5178 || IS_COREFILE_NOTE (segment, section))
5180 if (map->count == 0)
5182 /* If the first section in a segment does not start at
5183 the beginning of the segment, then something is
5185 if (output_section->lma !=
5187 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5188 + (map->includes_phdrs
5189 ? iehdr->e_phnum * iehdr->e_phentsize
5195 asection * prev_sec;
5197 prev_sec = map->sections[map->count - 1];
5199 /* If the gap between the end of the previous section
5200 and the start of this section is more than
5201 maxpagesize then we need to start a new segment. */
5202 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
5204 < BFD_ALIGN (output_section->lma, maxpagesize))
5205 || ((prev_sec->lma + prev_sec->_raw_size)
5206 > output_section->lma))
5208 if (suggested_lma == 0)
5209 suggested_lma = output_section->lma;
5215 map->sections[map->count++] = output_section;
5218 section->segment_mark = TRUE;
5220 else if (suggested_lma == 0)
5221 suggested_lma = output_section->lma;
5224 BFD_ASSERT (map->count > 0);
5226 /* Add the current segment to the list of built segments. */
5227 *pointer_to_map = map;
5228 pointer_to_map = &map->next;
5230 if (isec < section_count)
5232 /* We still have not allocated all of the sections to
5233 segments. Create a new segment here, initialise it
5234 and carry on looping. */
5235 amt = sizeof (struct elf_segment_map);
5236 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5237 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5244 /* Initialise the fields of the segment map. Set the physical
5245 physical address to the LMA of the first section that has
5246 not yet been assigned. */
5248 map->p_type = segment->p_type;
5249 map->p_flags = segment->p_flags;
5250 map->p_flags_valid = 1;
5251 map->p_paddr = suggested_lma;
5252 map->p_paddr_valid = 1;
5253 map->includes_filehdr = 0;
5254 map->includes_phdrs = 0;
5257 while (isec < section_count);
5262 /* The Solaris linker creates program headers in which all the
5263 p_paddr fields are zero. When we try to objcopy or strip such a
5264 file, we get confused. Check for this case, and if we find it
5265 reset the p_paddr_valid fields. */
5266 for (map = map_first; map != NULL; map = map->next)
5267 if (map->p_paddr != 0)
5270 for (map = map_first; map != NULL; map = map->next)
5271 map->p_paddr_valid = 0;
5273 elf_tdata (obfd)->segment_map = map_first;
5275 /* If we had to estimate the number of program headers that were
5276 going to be needed, then check our estimate now and adjust
5277 the offset if necessary. */
5278 if (phdr_adjust_seg != NULL)
5282 for (count = 0, map = map_first; map != NULL; map = map->next)
5285 if (count > phdr_adjust_num)
5286 phdr_adjust_seg->p_paddr
5287 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
5291 /* Final Step: Sort the segments into ascending order of physical
5293 if (map_first != NULL)
5295 struct elf_segment_map *prev;
5298 for (map = map_first->next; map != NULL; prev = map, map = map->next)
5300 /* Yes I know - its a bubble sort.... */
5301 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
5303 /* Swap map and map->next. */
5304 prev->next = map->next;
5305 map->next = map->next->next;
5306 prev->next->next = map;
5317 #undef IS_CONTAINED_BY_VMA
5318 #undef IS_CONTAINED_BY_LMA
5319 #undef IS_COREFILE_NOTE
5320 #undef IS_SOLARIS_PT_INTERP
5321 #undef INCLUDE_SECTION_IN_SEGMENT
5322 #undef SEGMENT_AFTER_SEGMENT
5323 #undef SEGMENT_OVERLAPS
5327 /* Copy private section information. This copies over the entsize
5328 field, and sometimes the info field. */
5331 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
5337 Elf_Internal_Shdr *ihdr, *ohdr;
5339 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5340 || obfd->xvec->flavour != bfd_target_elf_flavour)
5343 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5347 /* Only set up the segments if there are no more SEC_ALLOC
5348 sections. FIXME: This won't do the right thing if objcopy is
5349 used to remove the last SEC_ALLOC section, since objcopy
5350 won't call this routine in that case. */
5351 for (s = isec->next; s != NULL; s = s->next)
5352 if ((s->flags & SEC_ALLOC) != 0)
5356 if (! copy_private_bfd_data (ibfd, obfd))
5361 ihdr = &elf_section_data (isec)->this_hdr;
5362 ohdr = &elf_section_data (osec)->this_hdr;
5364 ohdr->sh_entsize = ihdr->sh_entsize;
5366 if (ihdr->sh_type == SHT_SYMTAB
5367 || ihdr->sh_type == SHT_DYNSYM
5368 || ihdr->sh_type == SHT_GNU_verneed
5369 || ihdr->sh_type == SHT_GNU_verdef)
5370 ohdr->sh_info = ihdr->sh_info;
5372 /* Set things up for objcopy. The output SHT_GROUP section will
5373 have its elf_next_in_group pointing back to the input group
5375 elf_next_in_group (osec) = elf_next_in_group (isec);
5376 elf_group_name (osec) = elf_group_name (isec);
5378 osec->use_rela_p = isec->use_rela_p;
5383 /* Copy private symbol information. If this symbol is in a section
5384 which we did not map into a BFD section, try to map the section
5385 index correctly. We use special macro definitions for the mapped
5386 section indices; these definitions are interpreted by the
5387 swap_out_syms function. */
5389 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5390 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5391 #define MAP_STRTAB (SHN_HIOS + 3)
5392 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5393 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5396 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
5402 elf_symbol_type *isym, *osym;
5404 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5405 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5408 isym = elf_symbol_from (ibfd, isymarg);
5409 osym = elf_symbol_from (obfd, osymarg);
5413 && bfd_is_abs_section (isym->symbol.section))
5417 shndx = isym->internal_elf_sym.st_shndx;
5418 if (shndx == elf_onesymtab (ibfd))
5419 shndx = MAP_ONESYMTAB;
5420 else if (shndx == elf_dynsymtab (ibfd))
5421 shndx = MAP_DYNSYMTAB;
5422 else if (shndx == elf_tdata (ibfd)->strtab_section)
5424 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5425 shndx = MAP_SHSTRTAB;
5426 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5427 shndx = MAP_SYM_SHNDX;
5428 osym->internal_elf_sym.st_shndx = shndx;
5434 /* Swap out the symbols. */
5437 swap_out_syms (abfd, sttp, relocatable_p)
5439 struct bfd_strtab_hash **sttp;
5442 struct elf_backend_data *bed;
5445 struct bfd_strtab_hash *stt;
5446 Elf_Internal_Shdr *symtab_hdr;
5447 Elf_Internal_Shdr *symtab_shndx_hdr;
5448 Elf_Internal_Shdr *symstrtab_hdr;
5449 char *outbound_syms;
5450 char *outbound_shndx;
5454 if (!elf_map_symbols (abfd))
5457 /* Dump out the symtabs. */
5458 stt = _bfd_elf_stringtab_init ();
5462 bed = get_elf_backend_data (abfd);
5463 symcount = bfd_get_symcount (abfd);
5464 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5465 symtab_hdr->sh_type = SHT_SYMTAB;
5466 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5467 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5468 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5469 symtab_hdr->sh_addralign = 1 << bed->s->log_file_align;
5471 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5472 symstrtab_hdr->sh_type = SHT_STRTAB;
5474 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5475 outbound_syms = bfd_alloc (abfd, amt);
5476 if (outbound_syms == NULL)
5478 _bfd_stringtab_free (stt);
5481 symtab_hdr->contents = (PTR) outbound_syms;
5483 outbound_shndx = NULL;
5484 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5485 if (symtab_shndx_hdr->sh_name != 0)
5487 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5488 outbound_shndx = bfd_zalloc (abfd, amt);
5489 if (outbound_shndx == NULL)
5491 _bfd_stringtab_free (stt);
5495 symtab_shndx_hdr->contents = outbound_shndx;
5496 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5497 symtab_shndx_hdr->sh_size = amt;
5498 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5499 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5502 /* Now generate the data (for "contents"). */
5504 /* Fill in zeroth symbol and swap it out. */
5505 Elf_Internal_Sym sym;
5511 sym.st_shndx = SHN_UNDEF;
5512 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5513 outbound_syms += bed->s->sizeof_sym;
5514 if (outbound_shndx != NULL)
5515 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5518 syms = bfd_get_outsymbols (abfd);
5519 for (idx = 0; idx < symcount; idx++)
5521 Elf_Internal_Sym sym;
5522 bfd_vma value = syms[idx]->value;
5523 elf_symbol_type *type_ptr;
5524 flagword flags = syms[idx]->flags;
5527 if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5529 /* Local section symbols have no name. */
5534 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5537 if (sym.st_name == (unsigned long) -1)
5539 _bfd_stringtab_free (stt);
5544 type_ptr = elf_symbol_from (abfd, syms[idx]);
5546 if ((flags & BSF_SECTION_SYM) == 0
5547 && bfd_is_com_section (syms[idx]->section))
5549 /* ELF common symbols put the alignment into the `value' field,
5550 and the size into the `size' field. This is backwards from
5551 how BFD handles it, so reverse it here. */
5552 sym.st_size = value;
5553 if (type_ptr == NULL
5554 || type_ptr->internal_elf_sym.st_value == 0)
5555 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5557 sym.st_value = type_ptr->internal_elf_sym.st_value;
5558 sym.st_shndx = _bfd_elf_section_from_bfd_section
5559 (abfd, syms[idx]->section);
5563 asection *sec = syms[idx]->section;
5566 if (sec->output_section)
5568 value += sec->output_offset;
5569 sec = sec->output_section;
5572 /* Don't add in the section vma for relocatable output. */
5573 if (! relocatable_p)
5575 sym.st_value = value;
5576 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5578 if (bfd_is_abs_section (sec)
5580 && type_ptr->internal_elf_sym.st_shndx != 0)
5582 /* This symbol is in a real ELF section which we did
5583 not create as a BFD section. Undo the mapping done
5584 by copy_private_symbol_data. */
5585 shndx = type_ptr->internal_elf_sym.st_shndx;
5589 shndx = elf_onesymtab (abfd);
5592 shndx = elf_dynsymtab (abfd);
5595 shndx = elf_tdata (abfd)->strtab_section;
5598 shndx = elf_tdata (abfd)->shstrtab_section;
5601 shndx = elf_tdata (abfd)->symtab_shndx_section;
5609 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5615 /* Writing this would be a hell of a lot easier if
5616 we had some decent documentation on bfd, and
5617 knew what to expect of the library, and what to
5618 demand of applications. For example, it
5619 appears that `objcopy' might not set the
5620 section of a symbol to be a section that is
5621 actually in the output file. */
5622 sec2 = bfd_get_section_by_name (abfd, sec->name);
5625 _bfd_error_handler (_("\
5626 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5627 syms[idx]->name ? syms[idx]->name : "<Local sym>",
5629 bfd_set_error (bfd_error_invalid_operation);
5630 _bfd_stringtab_free (stt);
5634 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5635 BFD_ASSERT (shndx != -1);
5639 sym.st_shndx = shndx;
5642 if ((flags & BSF_THREAD_LOCAL) != 0)
5644 else if ((flags & BSF_FUNCTION) != 0)
5646 else if ((flags & BSF_OBJECT) != 0)
5651 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5654 /* Processor-specific types. */
5655 if (type_ptr != NULL
5656 && bed->elf_backend_get_symbol_type)
5657 type = ((*bed->elf_backend_get_symbol_type)
5658 (&type_ptr->internal_elf_sym, type));
5660 if (flags & BSF_SECTION_SYM)
5662 if (flags & BSF_GLOBAL)
5663 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5665 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5667 else if (bfd_is_com_section (syms[idx]->section))
5668 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5669 else if (bfd_is_und_section (syms[idx]->section))
5670 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5674 else if (flags & BSF_FILE)
5675 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5678 int bind = STB_LOCAL;
5680 if (flags & BSF_LOCAL)
5682 else if (flags & BSF_WEAK)
5684 else if (flags & BSF_GLOBAL)
5687 sym.st_info = ELF_ST_INFO (bind, type);
5690 if (type_ptr != NULL)
5691 sym.st_other = type_ptr->internal_elf_sym.st_other;
5695 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5696 outbound_syms += bed->s->sizeof_sym;
5697 if (outbound_shndx != NULL)
5698 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5702 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5703 symstrtab_hdr->sh_type = SHT_STRTAB;
5705 symstrtab_hdr->sh_flags = 0;
5706 symstrtab_hdr->sh_addr = 0;
5707 symstrtab_hdr->sh_entsize = 0;
5708 symstrtab_hdr->sh_link = 0;
5709 symstrtab_hdr->sh_info = 0;
5710 symstrtab_hdr->sh_addralign = 1;
5715 /* Return the number of bytes required to hold the symtab vector.
5717 Note that we base it on the count plus 1, since we will null terminate
5718 the vector allocated based on this size. However, the ELF symbol table
5719 always has a dummy entry as symbol #0, so it ends up even. */
5722 _bfd_elf_get_symtab_upper_bound (abfd)
5727 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5729 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5730 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5732 symtab_size -= sizeof (asymbol *);
5738 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
5743 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5745 if (elf_dynsymtab (abfd) == 0)
5747 bfd_set_error (bfd_error_invalid_operation);
5751 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5752 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5754 symtab_size -= sizeof (asymbol *);
5760 _bfd_elf_get_reloc_upper_bound (abfd, asect)
5761 bfd *abfd ATTRIBUTE_UNUSED;
5764 return (asect->reloc_count + 1) * sizeof (arelent *);
5767 /* Canonicalize the relocs. */
5770 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
5778 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5780 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
5783 tblptr = section->relocation;
5784 for (i = 0; i < section->reloc_count; i++)
5785 *relptr++ = tblptr++;
5789 return section->reloc_count;
5793 _bfd_elf_get_symtab (abfd, alocation)
5795 asymbol **alocation;
5797 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5798 long symcount = bed->s->slurp_symbol_table (abfd, alocation, FALSE);
5801 bfd_get_symcount (abfd) = symcount;
5806 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
5808 asymbol **alocation;
5810 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5811 long symcount = bed->s->slurp_symbol_table (abfd, alocation, TRUE);
5814 bfd_get_dynamic_symcount (abfd) = symcount;
5818 /* Return the size required for the dynamic reloc entries. Any
5819 section that was actually installed in the BFD, and has type
5820 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5821 considered to be a dynamic reloc section. */
5824 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
5830 if (elf_dynsymtab (abfd) == 0)
5832 bfd_set_error (bfd_error_invalid_operation);
5836 ret = sizeof (arelent *);
5837 for (s = abfd->sections; s != NULL; s = s->next)
5838 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5839 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5840 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5841 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5842 * sizeof (arelent *));
5847 /* Canonicalize the dynamic relocation entries. Note that we return
5848 the dynamic relocations as a single block, although they are
5849 actually associated with particular sections; the interface, which
5850 was designed for SunOS style shared libraries, expects that there
5851 is only one set of dynamic relocs. Any section that was actually
5852 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5853 the dynamic symbol table, is considered to be a dynamic reloc
5857 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
5862 bfd_boolean (*slurp_relocs)
5863 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
5867 if (elf_dynsymtab (abfd) == 0)
5869 bfd_set_error (bfd_error_invalid_operation);
5873 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5875 for (s = abfd->sections; s != NULL; s = s->next)
5877 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5878 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5879 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5884 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
5886 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5888 for (i = 0; i < count; i++)
5899 /* Read in the version information. */
5902 _bfd_elf_slurp_version_tables (abfd)
5905 bfd_byte *contents = NULL;
5908 if (elf_dynverdef (abfd) != 0)
5910 Elf_Internal_Shdr *hdr;
5911 Elf_External_Verdef *everdef;
5912 Elf_Internal_Verdef *iverdef;
5913 Elf_Internal_Verdef *iverdefarr;
5914 Elf_Internal_Verdef iverdefmem;
5916 unsigned int maxidx;
5918 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5920 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5921 if (contents == NULL)
5923 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5924 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5927 /* We know the number of entries in the section but not the maximum
5928 index. Therefore we have to run through all entries and find
5930 everdef = (Elf_External_Verdef *) contents;
5932 for (i = 0; i < hdr->sh_info; ++i)
5934 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5936 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5937 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5939 everdef = ((Elf_External_Verdef *)
5940 ((bfd_byte *) everdef + iverdefmem.vd_next));
5943 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5944 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
5945 if (elf_tdata (abfd)->verdef == NULL)
5948 elf_tdata (abfd)->cverdefs = maxidx;
5950 everdef = (Elf_External_Verdef *) contents;
5951 iverdefarr = elf_tdata (abfd)->verdef;
5952 for (i = 0; i < hdr->sh_info; i++)
5954 Elf_External_Verdaux *everdaux;
5955 Elf_Internal_Verdaux *iverdaux;
5958 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5960 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5961 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5963 iverdef->vd_bfd = abfd;
5965 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5966 iverdef->vd_auxptr = (Elf_Internal_Verdaux *) bfd_alloc (abfd, amt);
5967 if (iverdef->vd_auxptr == NULL)
5970 everdaux = ((Elf_External_Verdaux *)
5971 ((bfd_byte *) everdef + iverdef->vd_aux));
5972 iverdaux = iverdef->vd_auxptr;
5973 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5975 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5977 iverdaux->vda_nodename =
5978 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5979 iverdaux->vda_name);
5980 if (iverdaux->vda_nodename == NULL)
5983 if (j + 1 < iverdef->vd_cnt)
5984 iverdaux->vda_nextptr = iverdaux + 1;
5986 iverdaux->vda_nextptr = NULL;
5988 everdaux = ((Elf_External_Verdaux *)
5989 ((bfd_byte *) everdaux + iverdaux->vda_next));
5992 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5994 if (i + 1 < hdr->sh_info)
5995 iverdef->vd_nextdef = iverdef + 1;
5997 iverdef->vd_nextdef = NULL;
5999 everdef = ((Elf_External_Verdef *)
6000 ((bfd_byte *) everdef + iverdef->vd_next));
6007 if (elf_dynverref (abfd) != 0)
6009 Elf_Internal_Shdr *hdr;
6010 Elf_External_Verneed *everneed;
6011 Elf_Internal_Verneed *iverneed;
6014 hdr = &elf_tdata (abfd)->dynverref_hdr;
6016 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
6017 elf_tdata (abfd)->verref =
6018 (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt);
6019 if (elf_tdata (abfd)->verref == NULL)
6022 elf_tdata (abfd)->cverrefs = hdr->sh_info;
6024 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
6025 if (contents == NULL)
6027 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
6028 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
6031 everneed = (Elf_External_Verneed *) contents;
6032 iverneed = elf_tdata (abfd)->verref;
6033 for (i = 0; i < hdr->sh_info; i++, iverneed++)
6035 Elf_External_Vernaux *evernaux;
6036 Elf_Internal_Vernaux *ivernaux;
6039 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
6041 iverneed->vn_bfd = abfd;
6043 iverneed->vn_filename =
6044 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6046 if (iverneed->vn_filename == NULL)
6049 amt = iverneed->vn_cnt;
6050 amt *= sizeof (Elf_Internal_Vernaux);
6051 iverneed->vn_auxptr = (Elf_Internal_Vernaux *) bfd_alloc (abfd, amt);
6053 evernaux = ((Elf_External_Vernaux *)
6054 ((bfd_byte *) everneed + iverneed->vn_aux));
6055 ivernaux = iverneed->vn_auxptr;
6056 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
6058 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
6060 ivernaux->vna_nodename =
6061 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
6062 ivernaux->vna_name);
6063 if (ivernaux->vna_nodename == NULL)
6066 if (j + 1 < iverneed->vn_cnt)
6067 ivernaux->vna_nextptr = ivernaux + 1;
6069 ivernaux->vna_nextptr = NULL;
6071 evernaux = ((Elf_External_Vernaux *)
6072 ((bfd_byte *) evernaux + ivernaux->vna_next));
6075 if (i + 1 < hdr->sh_info)
6076 iverneed->vn_nextref = iverneed + 1;
6078 iverneed->vn_nextref = NULL;
6080 everneed = ((Elf_External_Verneed *)
6081 ((bfd_byte *) everneed + iverneed->vn_next));
6091 if (contents != NULL)
6097 _bfd_elf_make_empty_symbol (abfd)
6100 elf_symbol_type *newsym;
6101 bfd_size_type amt = sizeof (elf_symbol_type);
6103 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
6108 newsym->symbol.the_bfd = abfd;
6109 return &newsym->symbol;
6114 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
6115 bfd *ignore_abfd ATTRIBUTE_UNUSED;
6119 bfd_symbol_info (symbol, ret);
6122 /* Return whether a symbol name implies a local symbol. Most targets
6123 use this function for the is_local_label_name entry point, but some
6127 _bfd_elf_is_local_label_name (abfd, name)
6128 bfd *abfd ATTRIBUTE_UNUSED;
6131 /* Normal local symbols start with ``.L''. */
6132 if (name[0] == '.' && name[1] == 'L')
6135 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6136 DWARF debugging symbols starting with ``..''. */
6137 if (name[0] == '.' && name[1] == '.')
6140 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6141 emitting DWARF debugging output. I suspect this is actually a
6142 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6143 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6144 underscore to be emitted on some ELF targets). For ease of use,
6145 we treat such symbols as local. */
6146 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
6153 _bfd_elf_get_lineno (ignore_abfd, symbol)
6154 bfd *ignore_abfd ATTRIBUTE_UNUSED;
6155 asymbol *symbol ATTRIBUTE_UNUSED;
6162 _bfd_elf_set_arch_mach (abfd, arch, machine)
6164 enum bfd_architecture arch;
6165 unsigned long machine;
6167 /* If this isn't the right architecture for this backend, and this
6168 isn't the generic backend, fail. */
6169 if (arch != get_elf_backend_data (abfd)->arch
6170 && arch != bfd_arch_unknown
6171 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
6174 return bfd_default_set_arch_mach (abfd, arch, machine);
6177 /* Find the function to a particular section and offset,
6178 for error reporting. */
6181 elf_find_function (abfd, section, symbols, offset,
6182 filename_ptr, functionname_ptr)
6183 bfd *abfd ATTRIBUTE_UNUSED;
6187 const char **filename_ptr;
6188 const char **functionname_ptr;
6190 const char *filename;
6199 for (p = symbols; *p != NULL; p++)
6203 q = (elf_symbol_type *) *p;
6205 if (bfd_get_section (&q->symbol) != section)
6208 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6213 filename = bfd_asymbol_name (&q->symbol);
6217 if (q->symbol.section == section
6218 && q->symbol.value >= low_func
6219 && q->symbol.value <= offset)
6221 func = (asymbol *) q;
6222 low_func = q->symbol.value;
6232 *filename_ptr = filename;
6233 if (functionname_ptr)
6234 *functionname_ptr = bfd_asymbol_name (func);
6239 /* Find the nearest line to a particular section and offset,
6240 for error reporting. */
6243 _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
6244 filename_ptr, functionname_ptr, line_ptr)
6249 const char **filename_ptr;
6250 const char **functionname_ptr;
6251 unsigned int *line_ptr;
6255 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
6256 filename_ptr, functionname_ptr,
6259 if (!*functionname_ptr)
6260 elf_find_function (abfd, section, symbols, offset,
6261 *filename_ptr ? NULL : filename_ptr,
6267 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
6268 filename_ptr, functionname_ptr,
6270 &elf_tdata (abfd)->dwarf2_find_line_info))
6272 if (!*functionname_ptr)
6273 elf_find_function (abfd, section, symbols, offset,
6274 *filename_ptr ? NULL : filename_ptr,
6280 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6281 &found, filename_ptr,
6282 functionname_ptr, line_ptr,
6283 &elf_tdata (abfd)->line_info))
6285 if (found && (*functionname_ptr || *line_ptr))
6288 if (symbols == NULL)
6291 if (! elf_find_function (abfd, section, symbols, offset,
6292 filename_ptr, functionname_ptr))
6300 _bfd_elf_sizeof_headers (abfd, reloc)
6306 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
6308 ret += get_program_header_size (abfd);
6313 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
6318 bfd_size_type count;
6320 Elf_Internal_Shdr *hdr;
6323 if (! abfd->output_has_begun
6324 && ! (_bfd_elf_compute_section_file_positions
6325 (abfd, (struct bfd_link_info *) NULL)))
6328 hdr = &elf_section_data (section)->this_hdr;
6329 pos = hdr->sh_offset + offset;
6330 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6331 || bfd_bwrite (location, count, abfd) != count)
6338 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
6339 bfd *abfd ATTRIBUTE_UNUSED;
6340 arelent *cache_ptr ATTRIBUTE_UNUSED;
6341 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
6346 /* Try to convert a non-ELF reloc into an ELF one. */
6349 _bfd_elf_validate_reloc (abfd, areloc)
6353 /* Check whether we really have an ELF howto. */
6355 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6357 bfd_reloc_code_real_type code;
6358 reloc_howto_type *howto;
6360 /* Alien reloc: Try to determine its type to replace it with an
6361 equivalent ELF reloc. */
6363 if (areloc->howto->pc_relative)
6365 switch (areloc->howto->bitsize)
6368 code = BFD_RELOC_8_PCREL;
6371 code = BFD_RELOC_12_PCREL;
6374 code = BFD_RELOC_16_PCREL;
6377 code = BFD_RELOC_24_PCREL;
6380 code = BFD_RELOC_32_PCREL;
6383 code = BFD_RELOC_64_PCREL;
6389 howto = bfd_reloc_type_lookup (abfd, code);
6391 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6393 if (howto->pcrel_offset)
6394 areloc->addend += areloc->address;
6396 areloc->addend -= areloc->address; /* addend is unsigned!! */
6401 switch (areloc->howto->bitsize)
6407 code = BFD_RELOC_14;
6410 code = BFD_RELOC_16;
6413 code = BFD_RELOC_26;
6416 code = BFD_RELOC_32;
6419 code = BFD_RELOC_64;
6425 howto = bfd_reloc_type_lookup (abfd, code);
6429 areloc->howto = howto;
6437 (*_bfd_error_handler)
6438 (_("%s: unsupported relocation type %s"),
6439 bfd_archive_filename (abfd), areloc->howto->name);
6440 bfd_set_error (bfd_error_bad_value);
6445 _bfd_elf_close_and_cleanup (abfd)
6448 if (bfd_get_format (abfd) == bfd_object)
6450 if (elf_shstrtab (abfd) != NULL)
6451 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6454 return _bfd_generic_close_and_cleanup (abfd);
6457 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6458 in the relocation's offset. Thus we cannot allow any sort of sanity
6459 range-checking to interfere. There is nothing else to do in processing
6462 bfd_reloc_status_type
6463 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
6464 bfd *abfd ATTRIBUTE_UNUSED;
6465 arelent *re ATTRIBUTE_UNUSED;
6466 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
6467 PTR data ATTRIBUTE_UNUSED;
6468 asection *is ATTRIBUTE_UNUSED;
6469 bfd *obfd ATTRIBUTE_UNUSED;
6470 char **errmsg ATTRIBUTE_UNUSED;
6472 return bfd_reloc_ok;
6475 /* Elf core file support. Much of this only works on native
6476 toolchains, since we rely on knowing the
6477 machine-dependent procfs structure in order to pick
6478 out details about the corefile. */
6480 #ifdef HAVE_SYS_PROCFS_H
6481 # include <sys/procfs.h>
6484 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6487 elfcore_make_pid (abfd)
6490 return ((elf_tdata (abfd)->core_lwpid << 16)
6491 + (elf_tdata (abfd)->core_pid));
6494 /* If there isn't a section called NAME, make one, using
6495 data from SECT. Note, this function will generate a
6496 reference to NAME, so you shouldn't deallocate or
6500 elfcore_maybe_make_sect (abfd, name, sect)
6507 if (bfd_get_section_by_name (abfd, name) != NULL)
6510 sect2 = bfd_make_section (abfd, name);
6514 sect2->_raw_size = sect->_raw_size;
6515 sect2->filepos = sect->filepos;
6516 sect2->flags = sect->flags;
6517 sect2->alignment_power = sect->alignment_power;
6521 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6522 actually creates up to two pseudosections:
6523 - For the single-threaded case, a section named NAME, unless
6524 such a section already exists.
6525 - For the multi-threaded case, a section named "NAME/PID", where
6526 PID is elfcore_make_pid (abfd).
6527 Both pseudosections have identical contents. */
6529 _bfd_elfcore_make_pseudosection (abfd, name, size, filepos)
6536 char *threaded_name;
6540 /* Build the section name. */
6542 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6543 len = strlen (buf) + 1;
6544 threaded_name = bfd_alloc (abfd, (bfd_size_type) len);
6545 if (threaded_name == NULL)
6547 memcpy (threaded_name, buf, len);
6549 sect = bfd_make_section (abfd, threaded_name);
6552 sect->_raw_size = size;
6553 sect->filepos = filepos;
6554 sect->flags = SEC_HAS_CONTENTS;
6555 sect->alignment_power = 2;
6557 return elfcore_maybe_make_sect (abfd, name, sect);
6560 /* prstatus_t exists on:
6562 linux 2.[01] + glibc
6566 #if defined (HAVE_PRSTATUS_T)
6567 static bfd_boolean elfcore_grok_prstatus
6568 PARAMS ((bfd *, Elf_Internal_Note *));
6571 elfcore_grok_prstatus (abfd, note)
6573 Elf_Internal_Note *note;
6578 if (note->descsz == sizeof (prstatus_t))
6582 raw_size = sizeof (prstat.pr_reg);
6583 offset = offsetof (prstatus_t, pr_reg);
6584 memcpy (&prstat, note->descdata, sizeof (prstat));
6586 /* Do not overwrite the core signal if it
6587 has already been set by another thread. */
6588 if (elf_tdata (abfd)->core_signal == 0)
6589 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6590 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6592 /* pr_who exists on:
6595 pr_who doesn't exist on:
6598 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6599 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6602 #if defined (HAVE_PRSTATUS32_T)
6603 else if (note->descsz == sizeof (prstatus32_t))
6605 /* 64-bit host, 32-bit corefile */
6606 prstatus32_t prstat;
6608 raw_size = sizeof (prstat.pr_reg);
6609 offset = offsetof (prstatus32_t, pr_reg);
6610 memcpy (&prstat, note->descdata, sizeof (prstat));
6612 /* Do not overwrite the core signal if it
6613 has already been set by another thread. */
6614 if (elf_tdata (abfd)->core_signal == 0)
6615 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6616 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6618 /* pr_who exists on:
6621 pr_who doesn't exist on:
6624 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6625 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6628 #endif /* HAVE_PRSTATUS32_T */
6631 /* Fail - we don't know how to handle any other
6632 note size (ie. data object type). */
6636 /* Make a ".reg/999" section and a ".reg" section. */
6637 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6638 raw_size, note->descpos + offset);
6640 #endif /* defined (HAVE_PRSTATUS_T) */
6642 /* Create a pseudosection containing the exact contents of NOTE. */
6644 elfcore_make_note_pseudosection (abfd, name, note)
6647 Elf_Internal_Note *note;
6649 return _bfd_elfcore_make_pseudosection (abfd, name,
6650 note->descsz, note->descpos);
6653 /* There isn't a consistent prfpregset_t across platforms,
6654 but it doesn't matter, because we don't have to pick this
6655 data structure apart. */
6658 elfcore_grok_prfpreg (abfd, note)
6660 Elf_Internal_Note *note;
6662 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6665 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6666 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6670 elfcore_grok_prxfpreg (abfd, note)
6672 Elf_Internal_Note *note;
6674 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6677 #if defined (HAVE_PRPSINFO_T)
6678 typedef prpsinfo_t elfcore_psinfo_t;
6679 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6680 typedef prpsinfo32_t elfcore_psinfo32_t;
6684 #if defined (HAVE_PSINFO_T)
6685 typedef psinfo_t elfcore_psinfo_t;
6686 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6687 typedef psinfo32_t elfcore_psinfo32_t;
6691 /* return a malloc'ed copy of a string at START which is at
6692 most MAX bytes long, possibly without a terminating '\0'.
6693 the copy will always have a terminating '\0'. */
6696 _bfd_elfcore_strndup (abfd, start, max)
6702 char *end = memchr (start, '\0', max);
6710 dups = bfd_alloc (abfd, (bfd_size_type) len + 1);
6714 memcpy (dups, start, len);
6720 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6721 static bfd_boolean elfcore_grok_psinfo
6722 PARAMS ((bfd *, Elf_Internal_Note *));
6725 elfcore_grok_psinfo (abfd, note)
6727 Elf_Internal_Note *note;
6729 if (note->descsz == sizeof (elfcore_psinfo_t))
6731 elfcore_psinfo_t psinfo;
6733 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6735 elf_tdata (abfd)->core_program
6736 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6737 sizeof (psinfo.pr_fname));
6739 elf_tdata (abfd)->core_command
6740 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6741 sizeof (psinfo.pr_psargs));
6743 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6744 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6746 /* 64-bit host, 32-bit corefile */
6747 elfcore_psinfo32_t psinfo;
6749 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6751 elf_tdata (abfd)->core_program
6752 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6753 sizeof (psinfo.pr_fname));
6755 elf_tdata (abfd)->core_command
6756 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6757 sizeof (psinfo.pr_psargs));
6763 /* Fail - we don't know how to handle any other
6764 note size (ie. data object type). */
6768 /* Note that for some reason, a spurious space is tacked
6769 onto the end of the args in some (at least one anyway)
6770 implementations, so strip it off if it exists. */
6773 char *command = elf_tdata (abfd)->core_command;
6774 int n = strlen (command);
6776 if (0 < n && command[n - 1] == ' ')
6777 command[n - 1] = '\0';
6782 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6784 #if defined (HAVE_PSTATUS_T)
6785 static bfd_boolean elfcore_grok_pstatus
6786 PARAMS ((bfd *, Elf_Internal_Note *));
6789 elfcore_grok_pstatus (abfd, note)
6791 Elf_Internal_Note *note;
6793 if (note->descsz == sizeof (pstatus_t)
6794 #if defined (HAVE_PXSTATUS_T)
6795 || note->descsz == sizeof (pxstatus_t)
6801 memcpy (&pstat, note->descdata, sizeof (pstat));
6803 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6805 #if defined (HAVE_PSTATUS32_T)
6806 else if (note->descsz == sizeof (pstatus32_t))
6808 /* 64-bit host, 32-bit corefile */
6811 memcpy (&pstat, note->descdata, sizeof (pstat));
6813 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6816 /* Could grab some more details from the "representative"
6817 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6818 NT_LWPSTATUS note, presumably. */
6822 #endif /* defined (HAVE_PSTATUS_T) */
6824 #if defined (HAVE_LWPSTATUS_T)
6825 static bfd_boolean elfcore_grok_lwpstatus
6826 PARAMS ((bfd *, Elf_Internal_Note *));
6829 elfcore_grok_lwpstatus (abfd, note)
6831 Elf_Internal_Note *note;
6833 lwpstatus_t lwpstat;
6839 if (note->descsz != sizeof (lwpstat)
6840 #if defined (HAVE_LWPXSTATUS_T)
6841 && note->descsz != sizeof (lwpxstatus_t)
6846 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6848 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6849 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6851 /* Make a ".reg/999" section. */
6853 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6854 len = strlen (buf) + 1;
6855 name = bfd_alloc (abfd, (bfd_size_type) len);
6858 memcpy (name, buf, len);
6860 sect = bfd_make_section (abfd, name);
6864 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6865 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6866 sect->filepos = note->descpos
6867 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6870 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6871 sect->_raw_size = sizeof (lwpstat.pr_reg);
6872 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6875 sect->flags = SEC_HAS_CONTENTS;
6876 sect->alignment_power = 2;
6878 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6881 /* Make a ".reg2/999" section */
6883 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6884 len = strlen (buf) + 1;
6885 name = bfd_alloc (abfd, (bfd_size_type) len);
6888 memcpy (name, buf, len);
6890 sect = bfd_make_section (abfd, name);
6894 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6895 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6896 sect->filepos = note->descpos
6897 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6900 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6901 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6902 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6905 sect->flags = SEC_HAS_CONTENTS;
6906 sect->alignment_power = 2;
6908 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6910 #endif /* defined (HAVE_LWPSTATUS_T) */
6912 #if defined (HAVE_WIN32_PSTATUS_T)
6914 elfcore_grok_win32pstatus (abfd, note)
6916 Elf_Internal_Note *note;
6922 win32_pstatus_t pstatus;
6924 if (note->descsz < sizeof (pstatus))
6927 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6929 switch (pstatus.data_type)
6931 case NOTE_INFO_PROCESS:
6932 /* FIXME: need to add ->core_command. */
6933 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6934 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6937 case NOTE_INFO_THREAD:
6938 /* Make a ".reg/999" section. */
6939 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6941 len = strlen (buf) + 1;
6942 name = bfd_alloc (abfd, (bfd_size_type) len);
6946 memcpy (name, buf, len);
6948 sect = bfd_make_section (abfd, name);
6952 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6953 sect->filepos = (note->descpos
6954 + offsetof (struct win32_pstatus,
6955 data.thread_info.thread_context));
6956 sect->flags = SEC_HAS_CONTENTS;
6957 sect->alignment_power = 2;
6959 if (pstatus.data.thread_info.is_active_thread)
6960 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6964 case NOTE_INFO_MODULE:
6965 /* Make a ".module/xxxxxxxx" section. */
6966 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6968 len = strlen (buf) + 1;
6969 name = bfd_alloc (abfd, (bfd_size_type) len);
6973 memcpy (name, buf, len);
6975 sect = bfd_make_section (abfd, name);
6980 sect->_raw_size = note->descsz;
6981 sect->filepos = note->descpos;
6982 sect->flags = SEC_HAS_CONTENTS;
6983 sect->alignment_power = 2;
6992 #endif /* HAVE_WIN32_PSTATUS_T */
6995 elfcore_grok_note (abfd, note)
6997 Elf_Internal_Note *note;
6999 struct elf_backend_data *bed = get_elf_backend_data (abfd);
7007 if (bed->elf_backend_grok_prstatus)
7008 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
7010 #if defined (HAVE_PRSTATUS_T)
7011 return elfcore_grok_prstatus (abfd, note);
7016 #if defined (HAVE_PSTATUS_T)
7018 return elfcore_grok_pstatus (abfd, note);
7021 #if defined (HAVE_LWPSTATUS_T)
7023 return elfcore_grok_lwpstatus (abfd, note);
7026 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
7027 return elfcore_grok_prfpreg (abfd, note);
7029 #if defined (HAVE_WIN32_PSTATUS_T)
7030 case NT_WIN32PSTATUS:
7031 return elfcore_grok_win32pstatus (abfd, note);
7034 case NT_PRXFPREG: /* Linux SSE extension */
7035 if (note->namesz == 6
7036 && strcmp (note->namedata, "LINUX") == 0)
7037 return elfcore_grok_prxfpreg (abfd, note);
7043 if (bed->elf_backend_grok_psinfo)
7044 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
7046 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7047 return elfcore_grok_psinfo (abfd, note);
7054 asection *sect = bfd_make_section (abfd, ".auxv");
7058 sect->_raw_size = note->descsz;
7059 sect->filepos = note->descpos;
7060 sect->flags = SEC_HAS_CONTENTS;
7061 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
7069 elfcore_netbsd_get_lwpid (note, lwpidp)
7070 Elf_Internal_Note *note;
7075 cp = strchr (note->namedata, '@');
7078 *lwpidp = atoi(cp + 1);
7085 elfcore_grok_netbsd_procinfo (abfd, note)
7087 Elf_Internal_Note *note;
7090 /* Signal number at offset 0x08. */
7091 elf_tdata (abfd)->core_signal
7092 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
7094 /* Process ID at offset 0x50. */
7095 elf_tdata (abfd)->core_pid
7096 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
7098 /* Command name at 0x7c (max 32 bytes, including nul). */
7099 elf_tdata (abfd)->core_command
7100 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
7106 elfcore_grok_netbsd_note (abfd, note)
7108 Elf_Internal_Note *note;
7112 if (elfcore_netbsd_get_lwpid (note, &lwp))
7113 elf_tdata (abfd)->core_lwpid = lwp;
7115 if (note->type == NT_NETBSDCORE_PROCINFO)
7117 /* NetBSD-specific core "procinfo". Note that we expect to
7118 find this note before any of the others, which is fine,
7119 since the kernel writes this note out first when it
7120 creates a core file. */
7122 return elfcore_grok_netbsd_procinfo (abfd, note);
7125 /* As of Jan 2002 there are no other machine-independent notes
7126 defined for NetBSD core files. If the note type is less
7127 than the start of the machine-dependent note types, we don't
7130 if (note->type < NT_NETBSDCORE_FIRSTMACH)
7134 switch (bfd_get_arch (abfd))
7136 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7137 PT_GETFPREGS == mach+2. */
7139 case bfd_arch_alpha:
7140 case bfd_arch_sparc:
7143 case NT_NETBSDCORE_FIRSTMACH+0:
7144 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7146 case NT_NETBSDCORE_FIRSTMACH+2:
7147 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7153 /* On all other arch's, PT_GETREGS == mach+1 and
7154 PT_GETFPREGS == mach+3. */
7159 case NT_NETBSDCORE_FIRSTMACH+1:
7160 return elfcore_make_note_pseudosection (abfd, ".reg", note);
7162 case NT_NETBSDCORE_FIRSTMACH+3:
7163 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7173 elfcore_grok_nto_status (abfd, note, tid)
7175 Elf_Internal_Note *note;
7178 void *ddata = note->descdata;
7185 /* nto_procfs_status 'pid' field is at offset 0. */
7186 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
7188 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7189 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
7191 /* nto_procfs_status 'flags' field is at offset 8. */
7192 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
7194 /* nto_procfs_status 'what' field is at offset 14. */
7195 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
7197 elf_tdata (abfd)->core_signal = sig;
7198 elf_tdata (abfd)->core_lwpid = *tid;
7201 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7202 do not come from signals so we make sure we set the current
7203 thread just in case. */
7204 if (flags & 0x00000080)
7205 elf_tdata (abfd)->core_lwpid = *tid;
7207 /* Make a ".qnx_core_status/%d" section. */
7208 sprintf (buf, ".qnx_core_status/%d", *tid);
7210 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
7215 sect = bfd_make_section (abfd, name);
7219 sect->_raw_size = note->descsz;
7220 sect->filepos = note->descpos;
7221 sect->flags = SEC_HAS_CONTENTS;
7222 sect->alignment_power = 2;
7224 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
7228 elfcore_grok_nto_gregs (abfd, note, tid)
7230 Elf_Internal_Note *note;
7237 /* Make a ".reg/%d" section. */
7238 sprintf (buf, ".reg/%d", tid);
7240 name = bfd_alloc (abfd, (bfd_size_type) strlen (buf) + 1);
7245 sect = bfd_make_section (abfd, name);
7249 sect->_raw_size = note->descsz;
7250 sect->filepos = note->descpos;
7251 sect->flags = SEC_HAS_CONTENTS;
7252 sect->alignment_power = 2;
7254 /* This is the current thread. */
7255 if (elf_tdata (abfd)->core_lwpid == tid)
7256 return elfcore_maybe_make_sect (abfd, ".reg", sect);
7261 #define BFD_QNT_CORE_INFO 7
7262 #define BFD_QNT_CORE_STATUS 8
7263 #define BFD_QNT_CORE_GREG 9
7264 #define BFD_QNT_CORE_FPREG 10
7267 elfcore_grok_nto_note (abfd, note)
7269 Elf_Internal_Note *note;
7271 /* Every GREG section has a STATUS section before it. Store the
7272 tid from the previous call to pass down to the next gregs
7274 static pid_t tid = 1;
7278 case BFD_QNT_CORE_INFO: return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
7279 case BFD_QNT_CORE_STATUS: return elfcore_grok_nto_status (abfd, note, &tid);
7280 case BFD_QNT_CORE_GREG: return elfcore_grok_nto_gregs (abfd, note, tid);
7281 case BFD_QNT_CORE_FPREG: return elfcore_grok_prfpreg (abfd, note);
7282 default: return TRUE;
7286 /* Function: elfcore_write_note
7293 size of data for note
7296 End of buffer containing note. */
7299 elfcore_write_note (abfd, buf, bufsiz, name, type, input, size)
7308 Elf_External_Note *xnp;
7318 struct elf_backend_data *bed;
7320 namesz = strlen (name) + 1;
7321 bed = get_elf_backend_data (abfd);
7322 pad = -namesz & ((1 << bed->s->log_file_align) - 1);
7325 newspace = sizeof (Elf_External_Note) - 1 + namesz + pad + size;
7327 p = realloc (buf, *bufsiz + newspace);
7329 *bufsiz += newspace;
7330 xnp = (Elf_External_Note *) dest;
7331 H_PUT_32 (abfd, namesz, xnp->namesz);
7332 H_PUT_32 (abfd, size, xnp->descsz);
7333 H_PUT_32 (abfd, type, xnp->type);
7337 memcpy (dest, name, namesz);
7345 memcpy (dest, input, size);
7349 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7351 elfcore_write_prpsinfo (abfd, buf, bufsiz, fname, psargs)
7359 char *note_name = "CORE";
7361 #if defined (HAVE_PSINFO_T)
7363 note_type = NT_PSINFO;
7366 note_type = NT_PRPSINFO;
7369 memset (&data, 0, sizeof (data));
7370 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
7371 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
7372 return elfcore_write_note (abfd, buf, bufsiz,
7373 note_name, note_type, &data, sizeof (data));
7375 #endif /* PSINFO_T or PRPSINFO_T */
7377 #if defined (HAVE_PRSTATUS_T)
7379 elfcore_write_prstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7388 char *note_name = "CORE";
7390 memset (&prstat, 0, sizeof (prstat));
7391 prstat.pr_pid = pid;
7392 prstat.pr_cursig = cursig;
7393 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
7394 return elfcore_write_note (abfd, buf, bufsiz,
7395 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
7397 #endif /* HAVE_PRSTATUS_T */
7399 #if defined (HAVE_LWPSTATUS_T)
7401 elfcore_write_lwpstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7409 lwpstatus_t lwpstat;
7410 char *note_name = "CORE";
7412 memset (&lwpstat, 0, sizeof (lwpstat));
7413 lwpstat.pr_lwpid = pid >> 16;
7414 lwpstat.pr_cursig = cursig;
7415 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7416 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
7417 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7419 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
7420 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
7422 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
7423 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
7426 return elfcore_write_note (abfd, buf, bufsiz, note_name,
7427 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
7429 #endif /* HAVE_LWPSTATUS_T */
7431 #if defined (HAVE_PSTATUS_T)
7433 elfcore_write_pstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7442 char *note_name = "CORE";
7444 memset (&pstat, 0, sizeof (pstat));
7445 pstat.pr_pid = pid & 0xffff;
7446 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7447 NT_PSTATUS, &pstat, sizeof (pstat));
7450 #endif /* HAVE_PSTATUS_T */
7453 elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size)
7460 char *note_name = "CORE";
7461 return elfcore_write_note (abfd, buf, bufsiz,
7462 note_name, NT_FPREGSET, fpregs, size);
7466 elfcore_write_prxfpreg (abfd, buf, bufsiz, xfpregs, size)
7473 char *note_name = "LINUX";
7474 return elfcore_write_note (abfd, buf, bufsiz,
7475 note_name, NT_PRXFPREG, xfpregs, size);
7479 elfcore_read_notes (abfd, offset, size)
7490 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7493 buf = bfd_malloc (size);
7497 if (bfd_bread (buf, size, abfd) != size)
7505 while (p < buf + size)
7507 /* FIXME: bad alignment assumption. */
7508 Elf_External_Note *xnp = (Elf_External_Note *) p;
7509 Elf_Internal_Note in;
7511 in.type = H_GET_32 (abfd, xnp->type);
7513 in.namesz = H_GET_32 (abfd, xnp->namesz);
7514 in.namedata = xnp->name;
7516 in.descsz = H_GET_32 (abfd, xnp->descsz);
7517 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7518 in.descpos = offset + (in.descdata - buf);
7520 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7522 if (! elfcore_grok_netbsd_note (abfd, &in))
7525 else if (strncmp (in.namedata, "QNX", 3) == 0)
7527 if (! elfcore_grok_nto_note (abfd, &in))
7532 if (! elfcore_grok_note (abfd, &in))
7536 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7543 /* Providing external access to the ELF program header table. */
7545 /* Return an upper bound on the number of bytes required to store a
7546 copy of ABFD's program header table entries. Return -1 if an error
7547 occurs; bfd_get_error will return an appropriate code. */
7550 bfd_get_elf_phdr_upper_bound (abfd)
7553 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7555 bfd_set_error (bfd_error_wrong_format);
7559 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7562 /* Copy ABFD's program header table entries to *PHDRS. The entries
7563 will be stored as an array of Elf_Internal_Phdr structures, as
7564 defined in include/elf/internal.h. To find out how large the
7565 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7567 Return the number of program header table entries read, or -1 if an
7568 error occurs; bfd_get_error will return an appropriate code. */
7571 bfd_get_elf_phdrs (abfd, phdrs)
7577 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7579 bfd_set_error (bfd_error_wrong_format);
7583 num_phdrs = elf_elfheader (abfd)->e_phnum;
7584 memcpy (phdrs, elf_tdata (abfd)->phdr,
7585 num_phdrs * sizeof (Elf_Internal_Phdr));
7591 _bfd_elf_sprintf_vma (abfd, buf, value)
7592 bfd *abfd ATTRIBUTE_UNUSED;
7597 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7599 i_ehdrp = elf_elfheader (abfd);
7600 if (i_ehdrp == NULL)
7601 sprintf_vma (buf, value);
7604 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7606 #if BFD_HOST_64BIT_LONG
7607 sprintf (buf, "%016lx", value);
7609 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7610 _bfd_int64_low (value));
7614 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7617 sprintf_vma (buf, value);
7622 _bfd_elf_fprintf_vma (abfd, stream, value)
7623 bfd *abfd ATTRIBUTE_UNUSED;
7628 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7630 i_ehdrp = elf_elfheader (abfd);
7631 if (i_ehdrp == NULL)
7632 fprintf_vma ((FILE *) stream, value);
7635 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7637 #if BFD_HOST_64BIT_LONG
7638 fprintf ((FILE *) stream, "%016lx", value);
7640 fprintf ((FILE *) stream, "%08lx%08lx",
7641 _bfd_int64_high (value), _bfd_int64_low (value));
7645 fprintf ((FILE *) stream, "%08lx",
7646 (unsigned long) (value & 0xffffffff));
7649 fprintf_vma ((FILE *) stream, value);
7653 enum elf_reloc_type_class
7654 _bfd_elf_reloc_type_class (rela)
7655 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED;
7657 return reloc_class_normal;
7660 /* For RELA architectures, return the relocation value for a
7661 relocation against a local symbol. */
7664 _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
7666 Elf_Internal_Sym *sym;
7668 Elf_Internal_Rela *rel;
7672 relocation = (sec->output_section->vma
7673 + sec->output_offset
7675 if ((sec->flags & SEC_MERGE)
7676 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7677 && sec->sec_info_type == ELF_INFO_TYPE_MERGE)
7683 _bfd_merged_section_offset (abfd, &msec,
7684 elf_section_data (sec)->sec_info,
7685 sym->st_value + rel->r_addend,
7688 rel->r_addend += msec->output_section->vma + msec->output_offset;
7694 _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
7696 Elf_Internal_Sym *sym;
7700 asection *sec = *psec;
7702 if (sec->sec_info_type != ELF_INFO_TYPE_MERGE)
7703 return sym->st_value + addend;
7705 return _bfd_merged_section_offset (abfd, psec,
7706 elf_section_data (sec)->sec_info,
7707 sym->st_value + addend, (bfd_vma) 0);
7711 _bfd_elf_section_offset (abfd, info, sec, offset)
7713 struct bfd_link_info *info;
7717 struct bfd_elf_section_data *sec_data;
7719 sec_data = elf_section_data (sec);
7720 switch (sec->sec_info_type)
7722 case ELF_INFO_TYPE_STABS:
7723 return _bfd_stab_section_offset (abfd,
7724 &elf_hash_table (info)->merge_info,
7725 sec, &sec_data->sec_info, offset);
7726 case ELF_INFO_TYPE_EH_FRAME:
7727 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);
7733 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
7734 reconstruct an ELF file by reading the segments out of remote memory
7735 based on the ELF file header at EHDR_VMA and the ELF program headers it
7736 points to. If not null, *LOADBASEP is filled in with the difference
7737 between the VMAs from which the segments were read, and the VMAs the
7738 file headers (and hence BFD's idea of each section's VMA) put them at.
7740 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
7741 remote memory at target address VMA into the local buffer at MYADDR; it
7742 should return zero on success or an `errno' code on failure. TEMPL must
7743 be a BFD for an ELF target with the word size and byte order found in
7744 the remote memory. */
7747 bfd_elf_bfd_from_remote_memory (templ, ehdr_vma, loadbasep, target_read_memory)
7751 int (*target_read_memory) PARAMS ((bfd_vma vma, char *myaddr, int len));
7753 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
7754 (templ, ehdr_vma, loadbasep, target_read_memory);