1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
5 Free Software Foundation, Inc.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
29 BFD support for ELF formats is being worked on.
30 Currently, the best supported back ends are for sparc and i386
31 (running svr4 or Solaris 2).
33 Documentation of the internals of the support code still needs
34 to be written. The code is changing quickly enough that we
35 haven't bothered yet. */
37 /* For sparc64-cross-sparc32. */
45 #include "libiberty.h"
46 #include "safe-ctype.h"
52 static int elf_sort_sections (const void *, const void *);
53 static bfd_boolean assign_file_positions_except_relocs (bfd *, struct bfd_link_info *);
54 static bfd_boolean prep_headers (bfd *);
55 static bfd_boolean swap_out_syms (bfd *, struct bfd_strtab_hash **, int) ;
56 static bfd_boolean elf_read_notes (bfd *, file_ptr, bfd_size_type) ;
57 static bfd_boolean elf_parse_notes (bfd *abfd, char *buf, size_t size,
60 /* Swap version information in and out. The version information is
61 currently size independent. If that ever changes, this code will
62 need to move into elfcode.h. */
64 /* Swap in a Verdef structure. */
67 _bfd_elf_swap_verdef_in (bfd *abfd,
68 const Elf_External_Verdef *src,
69 Elf_Internal_Verdef *dst)
71 dst->vd_version = H_GET_16 (abfd, src->vd_version);
72 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
73 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
74 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
75 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
76 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
77 dst->vd_next = H_GET_32 (abfd, src->vd_next);
80 /* Swap out a Verdef structure. */
83 _bfd_elf_swap_verdef_out (bfd *abfd,
84 const Elf_Internal_Verdef *src,
85 Elf_External_Verdef *dst)
87 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
88 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
89 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
90 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
91 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
92 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
93 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
96 /* Swap in a Verdaux structure. */
99 _bfd_elf_swap_verdaux_in (bfd *abfd,
100 const Elf_External_Verdaux *src,
101 Elf_Internal_Verdaux *dst)
103 dst->vda_name = H_GET_32 (abfd, src->vda_name);
104 dst->vda_next = H_GET_32 (abfd, src->vda_next);
107 /* Swap out a Verdaux structure. */
110 _bfd_elf_swap_verdaux_out (bfd *abfd,
111 const Elf_Internal_Verdaux *src,
112 Elf_External_Verdaux *dst)
114 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
115 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
118 /* Swap in a Verneed structure. */
121 _bfd_elf_swap_verneed_in (bfd *abfd,
122 const Elf_External_Verneed *src,
123 Elf_Internal_Verneed *dst)
125 dst->vn_version = H_GET_16 (abfd, src->vn_version);
126 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
127 dst->vn_file = H_GET_32 (abfd, src->vn_file);
128 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
129 dst->vn_next = H_GET_32 (abfd, src->vn_next);
132 /* Swap out a Verneed structure. */
135 _bfd_elf_swap_verneed_out (bfd *abfd,
136 const Elf_Internal_Verneed *src,
137 Elf_External_Verneed *dst)
139 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
140 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
141 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
142 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
143 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
146 /* Swap in a Vernaux structure. */
149 _bfd_elf_swap_vernaux_in (bfd *abfd,
150 const Elf_External_Vernaux *src,
151 Elf_Internal_Vernaux *dst)
153 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
154 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
155 dst->vna_other = H_GET_16 (abfd, src->vna_other);
156 dst->vna_name = H_GET_32 (abfd, src->vna_name);
157 dst->vna_next = H_GET_32 (abfd, src->vna_next);
160 /* Swap out a Vernaux structure. */
163 _bfd_elf_swap_vernaux_out (bfd *abfd,
164 const Elf_Internal_Vernaux *src,
165 Elf_External_Vernaux *dst)
167 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
168 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
169 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
170 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
171 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
174 /* Swap in a Versym structure. */
177 _bfd_elf_swap_versym_in (bfd *abfd,
178 const Elf_External_Versym *src,
179 Elf_Internal_Versym *dst)
181 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
184 /* Swap out a Versym structure. */
187 _bfd_elf_swap_versym_out (bfd *abfd,
188 const Elf_Internal_Versym *src,
189 Elf_External_Versym *dst)
191 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
194 /* Standard ELF hash function. Do not change this function; you will
195 cause invalid hash tables to be generated. */
198 bfd_elf_hash (const char *namearg)
200 const unsigned char *name = (const unsigned char *) namearg;
205 while ((ch = *name++) != '\0')
208 if ((g = (h & 0xf0000000)) != 0)
211 /* The ELF ABI says `h &= ~g', but this is equivalent in
212 this case and on some machines one insn instead of two. */
216 return h & 0xffffffff;
219 /* DT_GNU_HASH hash function. Do not change this function; you will
220 cause invalid hash tables to be generated. */
223 bfd_elf_gnu_hash (const char *namearg)
225 const unsigned char *name = (const unsigned char *) namearg;
226 unsigned long h = 5381;
229 while ((ch = *name++) != '\0')
230 h = (h << 5) + h + ch;
231 return h & 0xffffffff;
234 /* Create a tdata field OBJECT_SIZE bytes in length, zeroed out and with
235 the object_id field of an elf_obj_tdata field set to OBJECT_ID. */
237 bfd_elf_allocate_object (bfd *abfd,
239 enum elf_target_id object_id)
241 BFD_ASSERT (object_size >= sizeof (struct elf_obj_tdata));
242 abfd->tdata.any = bfd_zalloc (abfd, object_size);
243 if (abfd->tdata.any == NULL)
246 elf_object_id (abfd) = object_id;
247 elf_program_header_size (abfd) = (bfd_size_type) -1;
253 bfd_elf_make_object (bfd *abfd)
255 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
256 return bfd_elf_allocate_object (abfd, sizeof (struct elf_obj_tdata),
261 bfd_elf_mkcorefile (bfd *abfd)
263 /* I think this can be done just like an object file. */
264 return abfd->xvec->_bfd_set_format[(int) bfd_object] (abfd);
268 bfd_elf_get_str_section (bfd *abfd, unsigned int shindex)
270 Elf_Internal_Shdr **i_shdrp;
271 bfd_byte *shstrtab = NULL;
273 bfd_size_type shstrtabsize;
275 i_shdrp = elf_elfsections (abfd);
277 || shindex >= elf_numsections (abfd)
278 || i_shdrp[shindex] == 0)
281 shstrtab = i_shdrp[shindex]->contents;
282 if (shstrtab == NULL)
284 /* No cached one, attempt to read, and cache what we read. */
285 offset = i_shdrp[shindex]->sh_offset;
286 shstrtabsize = i_shdrp[shindex]->sh_size;
288 /* Allocate and clear an extra byte at the end, to prevent crashes
289 in case the string table is not terminated. */
290 if (shstrtabsize + 1 <= 1
291 || (shstrtab = (bfd_byte *) bfd_alloc (abfd, shstrtabsize + 1)) == NULL
292 || bfd_seek (abfd, offset, SEEK_SET) != 0)
294 else if (bfd_bread (shstrtab, shstrtabsize, abfd) != shstrtabsize)
296 if (bfd_get_error () != bfd_error_system_call)
297 bfd_set_error (bfd_error_file_truncated);
299 /* Once we've failed to read it, make sure we don't keep
300 trying. Otherwise, we'll keep allocating space for
301 the string table over and over. */
302 i_shdrp[shindex]->sh_size = 0;
305 shstrtab[shstrtabsize] = '\0';
306 i_shdrp[shindex]->contents = shstrtab;
308 return (char *) shstrtab;
312 bfd_elf_string_from_elf_section (bfd *abfd,
313 unsigned int shindex,
314 unsigned int strindex)
316 Elf_Internal_Shdr *hdr;
321 if (elf_elfsections (abfd) == NULL || shindex >= elf_numsections (abfd))
324 hdr = elf_elfsections (abfd)[shindex];
326 if (hdr->contents == NULL
327 && bfd_elf_get_str_section (abfd, shindex) == NULL)
330 if (strindex >= hdr->sh_size)
332 unsigned int shstrndx = elf_elfheader(abfd)->e_shstrndx;
333 (*_bfd_error_handler)
334 (_("%B: invalid string offset %u >= %lu for section `%s'"),
335 abfd, strindex, (unsigned long) hdr->sh_size,
336 (shindex == shstrndx && strindex == hdr->sh_name
338 : bfd_elf_string_from_elf_section (abfd, shstrndx, hdr->sh_name)));
342 return ((char *) hdr->contents) + strindex;
345 /* Read and convert symbols to internal format.
346 SYMCOUNT specifies the number of symbols to read, starting from
347 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
348 are non-NULL, they are used to store the internal symbols, external
349 symbols, and symbol section index extensions, respectively.
350 Returns a pointer to the internal symbol buffer (malloced if necessary)
351 or NULL if there were no symbols or some kind of problem. */
354 bfd_elf_get_elf_syms (bfd *ibfd,
355 Elf_Internal_Shdr *symtab_hdr,
358 Elf_Internal_Sym *intsym_buf,
360 Elf_External_Sym_Shndx *extshndx_buf)
362 Elf_Internal_Shdr *shndx_hdr;
364 const bfd_byte *esym;
365 Elf_External_Sym_Shndx *alloc_extshndx;
366 Elf_External_Sym_Shndx *shndx;
367 Elf_Internal_Sym *alloc_intsym;
368 Elf_Internal_Sym *isym;
369 Elf_Internal_Sym *isymend;
370 const struct elf_backend_data *bed;
375 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
381 /* Normal syms might have section extension entries. */
383 if (symtab_hdr == &elf_tdata (ibfd)->symtab_hdr)
384 shndx_hdr = &elf_tdata (ibfd)->symtab_shndx_hdr;
386 /* Read the symbols. */
388 alloc_extshndx = NULL;
390 bed = get_elf_backend_data (ibfd);
391 extsym_size = bed->s->sizeof_sym;
392 amt = symcount * extsym_size;
393 pos = symtab_hdr->sh_offset + symoffset * extsym_size;
394 if (extsym_buf == NULL)
396 alloc_ext = bfd_malloc2 (symcount, extsym_size);
397 extsym_buf = alloc_ext;
399 if (extsym_buf == NULL
400 || bfd_seek (ibfd, pos, SEEK_SET) != 0
401 || bfd_bread (extsym_buf, amt, ibfd) != amt)
407 if (shndx_hdr == NULL || shndx_hdr->sh_size == 0)
411 amt = symcount * sizeof (Elf_External_Sym_Shndx);
412 pos = shndx_hdr->sh_offset + symoffset * sizeof (Elf_External_Sym_Shndx);
413 if (extshndx_buf == NULL)
415 alloc_extshndx = (Elf_External_Sym_Shndx *)
416 bfd_malloc2 (symcount, sizeof (Elf_External_Sym_Shndx));
417 extshndx_buf = alloc_extshndx;
419 if (extshndx_buf == NULL
420 || bfd_seek (ibfd, pos, SEEK_SET) != 0
421 || bfd_bread (extshndx_buf, amt, ibfd) != amt)
428 if (intsym_buf == NULL)
430 alloc_intsym = (Elf_Internal_Sym *)
431 bfd_malloc2 (symcount, sizeof (Elf_Internal_Sym));
432 intsym_buf = alloc_intsym;
433 if (intsym_buf == NULL)
437 /* Convert the symbols to internal form. */
438 isymend = intsym_buf + symcount;
439 for (esym = (const bfd_byte *) extsym_buf, isym = intsym_buf,
440 shndx = extshndx_buf;
442 esym += extsym_size, isym++, shndx = shndx != NULL ? shndx + 1 : NULL)
443 if (!(*bed->s->swap_symbol_in) (ibfd, esym, shndx, isym))
445 symoffset += (esym - (bfd_byte *) extsym_buf) / extsym_size;
446 (*_bfd_error_handler) (_("%B symbol number %lu references "
447 "nonexistent SHT_SYMTAB_SHNDX section"),
448 ibfd, (unsigned long) symoffset);
449 if (alloc_intsym != NULL)
456 if (alloc_ext != NULL)
458 if (alloc_extshndx != NULL)
459 free (alloc_extshndx);
464 /* Look up a symbol name. */
466 bfd_elf_sym_name (bfd *abfd,
467 Elf_Internal_Shdr *symtab_hdr,
468 Elf_Internal_Sym *isym,
472 unsigned int iname = isym->st_name;
473 unsigned int shindex = symtab_hdr->sh_link;
475 if (iname == 0 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
476 /* Check for a bogus st_shndx to avoid crashing. */
477 && isym->st_shndx < elf_numsections (abfd))
479 iname = elf_elfsections (abfd)[isym->st_shndx]->sh_name;
480 shindex = elf_elfheader (abfd)->e_shstrndx;
483 name = bfd_elf_string_from_elf_section (abfd, shindex, iname);
486 else if (sym_sec && *name == '\0')
487 name = bfd_section_name (abfd, sym_sec);
492 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
493 sections. The first element is the flags, the rest are section
496 typedef union elf_internal_group {
497 Elf_Internal_Shdr *shdr;
499 } Elf_Internal_Group;
501 /* Return the name of the group signature symbol. Why isn't the
502 signature just a string? */
505 group_signature (bfd *abfd, Elf_Internal_Shdr *ghdr)
507 Elf_Internal_Shdr *hdr;
508 unsigned char esym[sizeof (Elf64_External_Sym)];
509 Elf_External_Sym_Shndx eshndx;
510 Elf_Internal_Sym isym;
512 /* First we need to ensure the symbol table is available. Make sure
513 that it is a symbol table section. */
514 if (ghdr->sh_link >= elf_numsections (abfd))
516 hdr = elf_elfsections (abfd) [ghdr->sh_link];
517 if (hdr->sh_type != SHT_SYMTAB
518 || ! bfd_section_from_shdr (abfd, ghdr->sh_link))
521 /* Go read the symbol. */
522 hdr = &elf_tdata (abfd)->symtab_hdr;
523 if (bfd_elf_get_elf_syms (abfd, hdr, 1, ghdr->sh_info,
524 &isym, esym, &eshndx) == NULL)
527 return bfd_elf_sym_name (abfd, hdr, &isym, NULL);
530 /* Set next_in_group list pointer, and group name for NEWSECT. */
533 setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
535 unsigned int num_group = elf_tdata (abfd)->num_group;
537 /* If num_group is zero, read in all SHT_GROUP sections. The count
538 is set to -1 if there are no SHT_GROUP sections. */
541 unsigned int i, shnum;
543 /* First count the number of groups. If we have a SHT_GROUP
544 section with just a flag word (ie. sh_size is 4), ignore it. */
545 shnum = elf_numsections (abfd);
548 #define IS_VALID_GROUP_SECTION_HEADER(shdr) \
549 ( (shdr)->sh_type == SHT_GROUP \
550 && (shdr)->sh_size >= (2 * GRP_ENTRY_SIZE) \
551 && (shdr)->sh_entsize == GRP_ENTRY_SIZE \
552 && ((shdr)->sh_size % GRP_ENTRY_SIZE) == 0)
554 for (i = 0; i < shnum; i++)
556 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
558 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
564 num_group = (unsigned) -1;
565 elf_tdata (abfd)->num_group = num_group;
569 /* We keep a list of elf section headers for group sections,
570 so we can find them quickly. */
573 elf_tdata (abfd)->num_group = num_group;
574 elf_tdata (abfd)->group_sect_ptr = (Elf_Internal_Shdr **)
575 bfd_alloc2 (abfd, num_group, sizeof (Elf_Internal_Shdr *));
576 if (elf_tdata (abfd)->group_sect_ptr == NULL)
580 for (i = 0; i < shnum; i++)
582 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
584 if (IS_VALID_GROUP_SECTION_HEADER (shdr))
587 Elf_Internal_Group *dest;
589 /* Add to list of sections. */
590 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
593 /* Read the raw contents. */
594 BFD_ASSERT (sizeof (*dest) >= 4);
595 amt = shdr->sh_size * sizeof (*dest) / 4;
596 shdr->contents = (unsigned char *)
597 bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
598 /* PR binutils/4110: Handle corrupt group headers. */
599 if (shdr->contents == NULL)
602 (_("%B: Corrupt size field in group section header: 0x%lx"), abfd, shdr->sh_size);
603 bfd_set_error (bfd_error_bad_value);
607 memset (shdr->contents, 0, amt);
609 if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
610 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
614 /* Translate raw contents, a flag word followed by an
615 array of elf section indices all in target byte order,
616 to the flag word followed by an array of elf section
618 src = shdr->contents + shdr->sh_size;
619 dest = (Elf_Internal_Group *) (shdr->contents + amt);
626 idx = H_GET_32 (abfd, src);
627 if (src == shdr->contents)
630 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
631 shdr->bfd_section->flags
632 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
637 ((*_bfd_error_handler)
638 (_("%B: invalid SHT_GROUP entry"), abfd));
641 dest->shdr = elf_elfsections (abfd)[idx];
648 if (num_group != (unsigned) -1)
652 for (i = 0; i < num_group; i++)
654 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
655 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
656 unsigned int n_elt = shdr->sh_size / 4;
658 /* Look through this group's sections to see if current
659 section is a member. */
661 if ((++idx)->shdr == hdr)
665 /* We are a member of this group. Go looking through
666 other members to see if any others are linked via
668 idx = (Elf_Internal_Group *) shdr->contents;
669 n_elt = shdr->sh_size / 4;
671 if ((s = (++idx)->shdr->bfd_section) != NULL
672 && elf_next_in_group (s) != NULL)
676 /* Snarf the group name from other member, and
677 insert current section in circular list. */
678 elf_group_name (newsect) = elf_group_name (s);
679 elf_next_in_group (newsect) = elf_next_in_group (s);
680 elf_next_in_group (s) = newsect;
686 gname = group_signature (abfd, shdr);
689 elf_group_name (newsect) = gname;
691 /* Start a circular list with one element. */
692 elf_next_in_group (newsect) = newsect;
695 /* If the group section has been created, point to the
697 if (shdr->bfd_section != NULL)
698 elf_next_in_group (shdr->bfd_section) = newsect;
706 if (elf_group_name (newsect) == NULL)
708 (*_bfd_error_handler) (_("%B: no group info for section %A"),
715 _bfd_elf_setup_sections (bfd *abfd)
718 unsigned int num_group = elf_tdata (abfd)->num_group;
719 bfd_boolean result = TRUE;
722 /* Process SHF_LINK_ORDER. */
723 for (s = abfd->sections; s != NULL; s = s->next)
725 Elf_Internal_Shdr *this_hdr = &elf_section_data (s)->this_hdr;
726 if ((this_hdr->sh_flags & SHF_LINK_ORDER) != 0)
728 unsigned int elfsec = this_hdr->sh_link;
729 /* FIXME: The old Intel compiler and old strip/objcopy may
730 not set the sh_link or sh_info fields. Hence we could
731 get the situation where elfsec is 0. */
734 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
735 if (bed->link_order_error_handler)
736 bed->link_order_error_handler
737 (_("%B: warning: sh_link not set for section `%A'"),
742 asection *linksec = NULL;
744 if (elfsec < elf_numsections (abfd))
746 this_hdr = elf_elfsections (abfd)[elfsec];
747 linksec = this_hdr->bfd_section;
751 Some strip/objcopy may leave an incorrect value in
752 sh_link. We don't want to proceed. */
755 (*_bfd_error_handler)
756 (_("%B: sh_link [%d] in section `%A' is incorrect"),
757 s->owner, s, elfsec);
761 elf_linked_to_section (s) = linksec;
766 /* Process section groups. */
767 if (num_group == (unsigned) -1)
770 for (i = 0; i < num_group; i++)
772 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
773 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
774 unsigned int n_elt = shdr->sh_size / 4;
777 if ((++idx)->shdr->bfd_section)
778 elf_sec_group (idx->shdr->bfd_section) = shdr->bfd_section;
779 else if (idx->shdr->sh_type == SHT_RELA
780 || idx->shdr->sh_type == SHT_REL)
781 /* We won't include relocation sections in section groups in
782 output object files. We adjust the group section size here
783 so that relocatable link will work correctly when
784 relocation sections are in section group in input object
786 shdr->bfd_section->size -= 4;
789 /* There are some unknown sections in the group. */
790 (*_bfd_error_handler)
791 (_("%B: unknown [%d] section `%s' in group [%s]"),
793 (unsigned int) idx->shdr->sh_type,
794 bfd_elf_string_from_elf_section (abfd,
795 (elf_elfheader (abfd)
798 shdr->bfd_section->name);
806 bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
808 return elf_next_in_group (sec) != NULL;
811 /* Make a BFD section from an ELF section. We store a pointer to the
812 BFD section in the bfd_section field of the header. */
815 _bfd_elf_make_section_from_shdr (bfd *abfd,
816 Elf_Internal_Shdr *hdr,
822 const struct elf_backend_data *bed;
824 if (hdr->bfd_section != NULL)
827 newsect = bfd_make_section_anyway (abfd, name);
831 hdr->bfd_section = newsect;
832 elf_section_data (newsect)->this_hdr = *hdr;
833 elf_section_data (newsect)->this_idx = shindex;
835 /* Always use the real type/flags. */
836 elf_section_type (newsect) = hdr->sh_type;
837 elf_section_flags (newsect) = hdr->sh_flags;
839 newsect->filepos = hdr->sh_offset;
841 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
842 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
843 || ! bfd_set_section_alignment (abfd, newsect,
844 bfd_log2 (hdr->sh_addralign)))
847 flags = SEC_NO_FLAGS;
848 if (hdr->sh_type != SHT_NOBITS)
849 flags |= SEC_HAS_CONTENTS;
850 if (hdr->sh_type == SHT_GROUP)
851 flags |= SEC_GROUP | SEC_EXCLUDE;
852 if ((hdr->sh_flags & SHF_ALLOC) != 0)
855 if (hdr->sh_type != SHT_NOBITS)
858 if ((hdr->sh_flags & SHF_WRITE) == 0)
859 flags |= SEC_READONLY;
860 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
862 else if ((flags & SEC_LOAD) != 0)
864 if ((hdr->sh_flags & SHF_MERGE) != 0)
867 newsect->entsize = hdr->sh_entsize;
868 if ((hdr->sh_flags & SHF_STRINGS) != 0)
869 flags |= SEC_STRINGS;
871 if (hdr->sh_flags & SHF_GROUP)
872 if (!setup_group (abfd, hdr, newsect))
874 if ((hdr->sh_flags & SHF_TLS) != 0)
875 flags |= SEC_THREAD_LOCAL;
876 if ((hdr->sh_flags & SHF_EXCLUDE) != 0)
877 flags |= SEC_EXCLUDE;
879 if ((flags & SEC_ALLOC) == 0)
881 /* The debugging sections appear to be recognized only by name,
882 not any sort of flag. Their SEC_ALLOC bits are cleared. */
887 } debug_sections [] =
889 { STRING_COMMA_LEN ("debug") }, /* 'd' */
890 { NULL, 0 }, /* 'e' */
891 { NULL, 0 }, /* 'f' */
892 { STRING_COMMA_LEN ("gnu.linkonce.wi.") }, /* 'g' */
893 { NULL, 0 }, /* 'h' */
894 { NULL, 0 }, /* 'i' */
895 { NULL, 0 }, /* 'j' */
896 { NULL, 0 }, /* 'k' */
897 { STRING_COMMA_LEN ("line") }, /* 'l' */
898 { NULL, 0 }, /* 'm' */
899 { NULL, 0 }, /* 'n' */
900 { NULL, 0 }, /* 'o' */
901 { NULL, 0 }, /* 'p' */
902 { NULL, 0 }, /* 'q' */
903 { NULL, 0 }, /* 'r' */
904 { STRING_COMMA_LEN ("stab") }, /* 's' */
905 { NULL, 0 }, /* 't' */
906 { NULL, 0 }, /* 'u' */
907 { NULL, 0 }, /* 'v' */
908 { NULL, 0 }, /* 'w' */
909 { NULL, 0 }, /* 'x' */
910 { NULL, 0 }, /* 'y' */
911 { STRING_COMMA_LEN ("zdebug") } /* 'z' */
916 int i = name [1] - 'd';
918 && i < (int) ARRAY_SIZE (debug_sections)
919 && debug_sections [i].name != NULL
920 && strncmp (&name [1], debug_sections [i].name,
921 debug_sections [i].len) == 0)
922 flags |= SEC_DEBUGGING;
926 /* As a GNU extension, if the name begins with .gnu.linkonce, we
927 only link a single copy of the section. This is used to support
928 g++. g++ will emit each template expansion in its own section.
929 The symbols will be defined as weak, so that multiple definitions
930 are permitted. The GNU linker extension is to actually discard
931 all but one of the sections. */
932 if (CONST_STRNEQ (name, ".gnu.linkonce")
933 && elf_next_in_group (newsect) == NULL)
934 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
936 bed = get_elf_backend_data (abfd);
937 if (bed->elf_backend_section_flags)
938 if (! bed->elf_backend_section_flags (&flags, hdr))
941 if (! bfd_set_section_flags (abfd, newsect, flags))
944 /* We do not parse the PT_NOTE segments as we are interested even in the
945 separate debug info files which may have the segments offsets corrupted.
946 PT_NOTEs from the core files are currently not parsed using BFD. */
947 if (hdr->sh_type == SHT_NOTE)
951 if (!bfd_malloc_and_get_section (abfd, newsect, &contents))
954 elf_parse_notes (abfd, (char *) contents, hdr->sh_size, -1);
958 if ((flags & SEC_ALLOC) != 0)
960 Elf_Internal_Phdr *phdr;
961 unsigned int i, nload;
963 /* Some ELF linkers produce binaries with all the program header
964 p_paddr fields zero. If we have such a binary with more than
965 one PT_LOAD header, then leave the section lma equal to vma
966 so that we don't create sections with overlapping lma. */
967 phdr = elf_tdata (abfd)->phdr;
968 for (nload = 0, i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
969 if (phdr->p_paddr != 0)
971 else if (phdr->p_type == PT_LOAD && phdr->p_memsz != 0)
973 if (i >= elf_elfheader (abfd)->e_phnum && nload > 1)
976 phdr = elf_tdata (abfd)->phdr;
977 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
979 if (((phdr->p_type == PT_LOAD
980 && (hdr->sh_flags & SHF_TLS) == 0)
981 || phdr->p_type == PT_TLS)
982 && ELF_SECTION_IN_SEGMENT (hdr, phdr))
984 if ((flags & SEC_LOAD) == 0)
985 newsect->lma = (phdr->p_paddr
986 + hdr->sh_addr - phdr->p_vaddr);
988 /* We used to use the same adjustment for SEC_LOAD
989 sections, but that doesn't work if the segment
990 is packed with code from multiple VMAs.
991 Instead we calculate the section LMA based on
992 the segment LMA. It is assumed that the
993 segment will contain sections with contiguous
994 LMAs, even if the VMAs are not. */
995 newsect->lma = (phdr->p_paddr
996 + hdr->sh_offset - phdr->p_offset);
998 /* With contiguous segments, we can't tell from file
999 offsets whether a section with zero size should
1000 be placed at the end of one segment or the
1001 beginning of the next. Decide based on vaddr. */
1002 if (hdr->sh_addr >= phdr->p_vaddr
1003 && (hdr->sh_addr + hdr->sh_size
1004 <= phdr->p_vaddr + phdr->p_memsz))
1010 /* Compress/decompress DWARF debug sections with names: .debug_* and
1011 .zdebug_*, after the section flags is set. */
1012 if ((flags & SEC_DEBUGGING)
1013 && ((name[1] == 'd' && name[6] == '_')
1014 || (name[1] == 'z' && name[7] == '_')))
1016 enum { nothing, compress, decompress } action = nothing;
1019 if (bfd_is_section_compressed (abfd, newsect))
1021 /* Compressed section. Check if we should decompress. */
1022 if ((abfd->flags & BFD_DECOMPRESS))
1023 action = decompress;
1027 /* Normal section. Check if we should compress. */
1028 if ((abfd->flags & BFD_COMPRESS))
1038 if (!bfd_init_section_compress_status (abfd, newsect))
1040 (*_bfd_error_handler)
1041 (_("%B: unable to initialize commpress status for section %s"),
1047 unsigned int len = strlen (name);
1049 new_name = bfd_alloc (abfd, len + 2);
1050 if (new_name == NULL)
1054 memcpy (new_name + 2, name + 1, len);
1058 if (!bfd_init_section_decompress_status (abfd, newsect))
1060 (*_bfd_error_handler)
1061 (_("%B: unable to initialize decommpress status for section %s"),
1067 unsigned int len = strlen (name);
1069 new_name = bfd_alloc (abfd, len);
1070 if (new_name == NULL)
1073 memcpy (new_name + 1, name + 2, len - 1);
1077 if (new_name != NULL)
1078 bfd_rename_section (abfd, newsect, new_name);
1084 const char *const bfd_elf_section_type_names[] = {
1085 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
1086 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
1087 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
1090 /* ELF relocs are against symbols. If we are producing relocatable
1091 output, and the reloc is against an external symbol, and nothing
1092 has given us any additional addend, the resulting reloc will also
1093 be against the same symbol. In such a case, we don't want to
1094 change anything about the way the reloc is handled, since it will
1095 all be done at final link time. Rather than put special case code
1096 into bfd_perform_relocation, all the reloc types use this howto
1097 function. It just short circuits the reloc if producing
1098 relocatable output against an external symbol. */
1100 bfd_reloc_status_type
1101 bfd_elf_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1102 arelent *reloc_entry,
1104 void *data ATTRIBUTE_UNUSED,
1105 asection *input_section,
1107 char **error_message ATTRIBUTE_UNUSED)
1109 if (output_bfd != NULL
1110 && (symbol->flags & BSF_SECTION_SYM) == 0
1111 && (! reloc_entry->howto->partial_inplace
1112 || reloc_entry->addend == 0))
1114 reloc_entry->address += input_section->output_offset;
1115 return bfd_reloc_ok;
1118 return bfd_reloc_continue;
1121 /* Copy the program header and other data from one object module to
1125 _bfd_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
1127 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1128 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1131 BFD_ASSERT (!elf_flags_init (obfd)
1132 || (elf_elfheader (obfd)->e_flags
1133 == elf_elfheader (ibfd)->e_flags));
1135 elf_gp (obfd) = elf_gp (ibfd);
1136 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
1137 elf_flags_init (obfd) = TRUE;
1139 /* Copy object attributes. */
1140 _bfd_elf_copy_obj_attributes (ibfd, obfd);
1145 get_segment_type (unsigned int p_type)
1150 case PT_NULL: pt = "NULL"; break;
1151 case PT_LOAD: pt = "LOAD"; break;
1152 case PT_DYNAMIC: pt = "DYNAMIC"; break;
1153 case PT_INTERP: pt = "INTERP"; break;
1154 case PT_NOTE: pt = "NOTE"; break;
1155 case PT_SHLIB: pt = "SHLIB"; break;
1156 case PT_PHDR: pt = "PHDR"; break;
1157 case PT_TLS: pt = "TLS"; break;
1158 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
1159 case PT_GNU_STACK: pt = "STACK"; break;
1160 case PT_GNU_RELRO: pt = "RELRO"; break;
1161 default: pt = NULL; break;
1166 /* Print out the program headers. */
1169 _bfd_elf_print_private_bfd_data (bfd *abfd, void *farg)
1171 FILE *f = (FILE *) farg;
1172 Elf_Internal_Phdr *p;
1174 bfd_byte *dynbuf = NULL;
1176 p = elf_tdata (abfd)->phdr;
1181 fprintf (f, _("\nProgram Header:\n"));
1182 c = elf_elfheader (abfd)->e_phnum;
1183 for (i = 0; i < c; i++, p++)
1185 const char *pt = get_segment_type (p->p_type);
1190 sprintf (buf, "0x%lx", p->p_type);
1193 fprintf (f, "%8s off 0x", pt);
1194 bfd_fprintf_vma (abfd, f, p->p_offset);
1195 fprintf (f, " vaddr 0x");
1196 bfd_fprintf_vma (abfd, f, p->p_vaddr);
1197 fprintf (f, " paddr 0x");
1198 bfd_fprintf_vma (abfd, f, p->p_paddr);
1199 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
1200 fprintf (f, " filesz 0x");
1201 bfd_fprintf_vma (abfd, f, p->p_filesz);
1202 fprintf (f, " memsz 0x");
1203 bfd_fprintf_vma (abfd, f, p->p_memsz);
1204 fprintf (f, " flags %c%c%c",
1205 (p->p_flags & PF_R) != 0 ? 'r' : '-',
1206 (p->p_flags & PF_W) != 0 ? 'w' : '-',
1207 (p->p_flags & PF_X) != 0 ? 'x' : '-');
1208 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
1209 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
1214 s = bfd_get_section_by_name (abfd, ".dynamic");
1217 unsigned int elfsec;
1218 unsigned long shlink;
1219 bfd_byte *extdyn, *extdynend;
1221 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
1223 fprintf (f, _("\nDynamic Section:\n"));
1225 if (!bfd_malloc_and_get_section (abfd, s, &dynbuf))
1228 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1229 if (elfsec == SHN_BAD)
1231 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1233 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1234 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1237 extdynend = extdyn + s->size;
1238 for (; extdyn < extdynend; extdyn += extdynsize)
1240 Elf_Internal_Dyn dyn;
1241 const char *name = "";
1243 bfd_boolean stringp;
1244 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1246 (*swap_dyn_in) (abfd, extdyn, &dyn);
1248 if (dyn.d_tag == DT_NULL)
1255 if (bed->elf_backend_get_target_dtag)
1256 name = (*bed->elf_backend_get_target_dtag) (dyn.d_tag);
1258 if (!strcmp (name, ""))
1260 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1265 case DT_NEEDED: name = "NEEDED"; stringp = TRUE; break;
1266 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1267 case DT_PLTGOT: name = "PLTGOT"; break;
1268 case DT_HASH: name = "HASH"; break;
1269 case DT_STRTAB: name = "STRTAB"; break;
1270 case DT_SYMTAB: name = "SYMTAB"; break;
1271 case DT_RELA: name = "RELA"; break;
1272 case DT_RELASZ: name = "RELASZ"; break;
1273 case DT_RELAENT: name = "RELAENT"; break;
1274 case DT_STRSZ: name = "STRSZ"; break;
1275 case DT_SYMENT: name = "SYMENT"; break;
1276 case DT_INIT: name = "INIT"; break;
1277 case DT_FINI: name = "FINI"; break;
1278 case DT_SONAME: name = "SONAME"; stringp = TRUE; break;
1279 case DT_RPATH: name = "RPATH"; stringp = TRUE; break;
1280 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1281 case DT_REL: name = "REL"; break;
1282 case DT_RELSZ: name = "RELSZ"; break;
1283 case DT_RELENT: name = "RELENT"; break;
1284 case DT_PLTREL: name = "PLTREL"; break;
1285 case DT_DEBUG: name = "DEBUG"; break;
1286 case DT_TEXTREL: name = "TEXTREL"; break;
1287 case DT_JMPREL: name = "JMPREL"; break;
1288 case DT_BIND_NOW: name = "BIND_NOW"; break;
1289 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1290 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1291 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1292 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1293 case DT_RUNPATH: name = "RUNPATH"; stringp = TRUE; break;
1294 case DT_FLAGS: name = "FLAGS"; break;
1295 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1296 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1297 case DT_CHECKSUM: name = "CHECKSUM"; break;
1298 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1299 case DT_MOVEENT: name = "MOVEENT"; break;
1300 case DT_MOVESZ: name = "MOVESZ"; break;
1301 case DT_FEATURE: name = "FEATURE"; break;
1302 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1303 case DT_SYMINSZ: name = "SYMINSZ"; break;
1304 case DT_SYMINENT: name = "SYMINENT"; break;
1305 case DT_CONFIG: name = "CONFIG"; stringp = TRUE; break;
1306 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = TRUE; break;
1307 case DT_AUDIT: name = "AUDIT"; stringp = TRUE; break;
1308 case DT_PLTPAD: name = "PLTPAD"; break;
1309 case DT_MOVETAB: name = "MOVETAB"; break;
1310 case DT_SYMINFO: name = "SYMINFO"; break;
1311 case DT_RELACOUNT: name = "RELACOUNT"; break;
1312 case DT_RELCOUNT: name = "RELCOUNT"; break;
1313 case DT_FLAGS_1: name = "FLAGS_1"; break;
1314 case DT_VERSYM: name = "VERSYM"; break;
1315 case DT_VERDEF: name = "VERDEF"; break;
1316 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1317 case DT_VERNEED: name = "VERNEED"; break;
1318 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1319 case DT_AUXILIARY: name = "AUXILIARY"; stringp = TRUE; break;
1320 case DT_USED: name = "USED"; break;
1321 case DT_FILTER: name = "FILTER"; stringp = TRUE; break;
1322 case DT_GNU_HASH: name = "GNU_HASH"; break;
1325 fprintf (f, " %-20s ", name);
1329 bfd_fprintf_vma (abfd, f, dyn.d_un.d_val);
1334 unsigned int tagv = dyn.d_un.d_val;
1336 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1339 fprintf (f, "%s", string);
1348 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1349 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1351 if (! _bfd_elf_slurp_version_tables (abfd, FALSE))
1355 if (elf_dynverdef (abfd) != 0)
1357 Elf_Internal_Verdef *t;
1359 fprintf (f, _("\nVersion definitions:\n"));
1360 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1362 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1363 t->vd_flags, t->vd_hash,
1364 t->vd_nodename ? t->vd_nodename : "<corrupt>");
1365 if (t->vd_auxptr != NULL && t->vd_auxptr->vda_nextptr != NULL)
1367 Elf_Internal_Verdaux *a;
1370 for (a = t->vd_auxptr->vda_nextptr;
1374 a->vda_nodename ? a->vda_nodename : "<corrupt>");
1380 if (elf_dynverref (abfd) != 0)
1382 Elf_Internal_Verneed *t;
1384 fprintf (f, _("\nVersion References:\n"));
1385 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1387 Elf_Internal_Vernaux *a;
1389 fprintf (f, _(" required from %s:\n"),
1390 t->vn_filename ? t->vn_filename : "<corrupt>");
1391 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1392 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1393 a->vna_flags, a->vna_other,
1394 a->vna_nodename ? a->vna_nodename : "<corrupt>");
1406 /* Display ELF-specific fields of a symbol. */
1409 bfd_elf_print_symbol (bfd *abfd,
1412 bfd_print_symbol_type how)
1414 FILE *file = (FILE *) filep;
1417 case bfd_print_symbol_name:
1418 fprintf (file, "%s", symbol->name);
1420 case bfd_print_symbol_more:
1421 fprintf (file, "elf ");
1422 bfd_fprintf_vma (abfd, file, symbol->value);
1423 fprintf (file, " %lx", (unsigned long) symbol->flags);
1425 case bfd_print_symbol_all:
1427 const char *section_name;
1428 const char *name = NULL;
1429 const struct elf_backend_data *bed;
1430 unsigned char st_other;
1433 section_name = symbol->section ? symbol->section->name : "(*none*)";
1435 bed = get_elf_backend_data (abfd);
1436 if (bed->elf_backend_print_symbol_all)
1437 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1441 name = symbol->name;
1442 bfd_print_symbol_vandf (abfd, file, symbol);
1445 fprintf (file, " %s\t", section_name);
1446 /* Print the "other" value for a symbol. For common symbols,
1447 we've already printed the size; now print the alignment.
1448 For other symbols, we have no specified alignment, and
1449 we've printed the address; now print the size. */
1450 if (symbol->section && bfd_is_com_section (symbol->section))
1451 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1453 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1454 bfd_fprintf_vma (abfd, file, val);
1456 /* If we have version information, print it. */
1457 if (elf_tdata (abfd)->dynversym_section != 0
1458 && (elf_tdata (abfd)->dynverdef_section != 0
1459 || elf_tdata (abfd)->dynverref_section != 0))
1461 unsigned int vernum;
1462 const char *version_string;
1464 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1467 version_string = "";
1468 else if (vernum == 1)
1469 version_string = "Base";
1470 else if (vernum <= elf_tdata (abfd)->cverdefs)
1472 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1475 Elf_Internal_Verneed *t;
1477 version_string = "";
1478 for (t = elf_tdata (abfd)->verref;
1482 Elf_Internal_Vernaux *a;
1484 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1486 if (a->vna_other == vernum)
1488 version_string = a->vna_nodename;
1495 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1496 fprintf (file, " %-11s", version_string);
1501 fprintf (file, " (%s)", version_string);
1502 for (i = 10 - strlen (version_string); i > 0; --i)
1507 /* If the st_other field is not zero, print it. */
1508 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1513 case STV_INTERNAL: fprintf (file, " .internal"); break;
1514 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1515 case STV_PROTECTED: fprintf (file, " .protected"); break;
1517 /* Some other non-defined flags are also present, so print
1519 fprintf (file, " 0x%02x", (unsigned int) st_other);
1522 fprintf (file, " %s", name);
1528 /* Allocate an ELF string table--force the first byte to be zero. */
1530 struct bfd_strtab_hash *
1531 _bfd_elf_stringtab_init (void)
1533 struct bfd_strtab_hash *ret;
1535 ret = _bfd_stringtab_init ();
1540 loc = _bfd_stringtab_add (ret, "", TRUE, FALSE);
1541 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1542 if (loc == (bfd_size_type) -1)
1544 _bfd_stringtab_free (ret);
1551 /* ELF .o/exec file reading */
1553 /* Create a new bfd section from an ELF section header. */
1556 bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
1558 Elf_Internal_Shdr *hdr;
1559 Elf_Internal_Ehdr *ehdr;
1560 const struct elf_backend_data *bed;
1563 if (shindex >= elf_numsections (abfd))
1566 hdr = elf_elfsections (abfd)[shindex];
1567 ehdr = elf_elfheader (abfd);
1568 name = bfd_elf_string_from_elf_section (abfd, ehdr->e_shstrndx,
1573 bed = get_elf_backend_data (abfd);
1574 switch (hdr->sh_type)
1577 /* Inactive section. Throw it away. */
1580 case SHT_PROGBITS: /* Normal section with contents. */
1581 case SHT_NOBITS: /* .bss section. */
1582 case SHT_HASH: /* .hash section. */
1583 case SHT_NOTE: /* .note section. */
1584 case SHT_INIT_ARRAY: /* .init_array section. */
1585 case SHT_FINI_ARRAY: /* .fini_array section. */
1586 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1587 case SHT_GNU_LIBLIST: /* .gnu.liblist section. */
1588 case SHT_GNU_HASH: /* .gnu.hash section. */
1589 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1591 case SHT_DYNAMIC: /* Dynamic linking information. */
1592 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1594 if (hdr->sh_link > elf_numsections (abfd))
1596 /* PR 10478: Accept Solaris binaries with a sh_link
1597 field set to SHN_BEFORE or SHN_AFTER. */
1598 switch (bfd_get_arch (abfd))
1601 case bfd_arch_sparc:
1602 if (hdr->sh_link == (SHN_LORESERVE & 0xffff) /* SHN_BEFORE */
1603 || hdr->sh_link == ((SHN_LORESERVE + 1) & 0xffff) /* SHN_AFTER */)
1605 /* Otherwise fall through. */
1610 else if (elf_elfsections (abfd)[hdr->sh_link] == NULL)
1612 else if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1614 Elf_Internal_Shdr *dynsymhdr;
1616 /* The shared libraries distributed with hpux11 have a bogus
1617 sh_link field for the ".dynamic" section. Find the
1618 string table for the ".dynsym" section instead. */
1619 if (elf_dynsymtab (abfd) != 0)
1621 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1622 hdr->sh_link = dynsymhdr->sh_link;
1626 unsigned int i, num_sec;
1628 num_sec = elf_numsections (abfd);
1629 for (i = 1; i < num_sec; i++)
1631 dynsymhdr = elf_elfsections (abfd)[i];
1632 if (dynsymhdr->sh_type == SHT_DYNSYM)
1634 hdr->sh_link = dynsymhdr->sh_link;
1642 case SHT_SYMTAB: /* A symbol table */
1643 if (elf_onesymtab (abfd) == shindex)
1646 if (hdr->sh_entsize != bed->s->sizeof_sym)
1648 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1650 if (hdr->sh_size != 0)
1652 /* Some assemblers erroneously set sh_info to one with a
1653 zero sh_size. ld sees this as a global symbol count
1654 of (unsigned) -1. Fix it here. */
1658 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1659 elf_onesymtab (abfd) = shindex;
1660 elf_tdata (abfd)->symtab_hdr = *hdr;
1661 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1662 abfd->flags |= HAS_SYMS;
1664 /* Sometimes a shared object will map in the symbol table. If
1665 SHF_ALLOC is set, and this is a shared object, then we also
1666 treat this section as a BFD section. We can not base the
1667 decision purely on SHF_ALLOC, because that flag is sometimes
1668 set in a relocatable object file, which would confuse the
1670 if ((hdr->sh_flags & SHF_ALLOC) != 0
1671 && (abfd->flags & DYNAMIC) != 0
1672 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1676 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1677 can't read symbols without that section loaded as well. It
1678 is most likely specified by the next section header. */
1679 if (elf_elfsections (abfd)[elf_symtab_shndx (abfd)]->sh_link != shindex)
1681 unsigned int i, num_sec;
1683 num_sec = elf_numsections (abfd);
1684 for (i = shindex + 1; i < num_sec; i++)
1686 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1687 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1688 && hdr2->sh_link == shindex)
1692 for (i = 1; i < shindex; i++)
1694 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1695 if (hdr2->sh_type == SHT_SYMTAB_SHNDX
1696 && hdr2->sh_link == shindex)
1700 return bfd_section_from_shdr (abfd, i);
1704 case SHT_DYNSYM: /* A dynamic symbol table */
1705 if (elf_dynsymtab (abfd) == shindex)
1708 if (hdr->sh_entsize != bed->s->sizeof_sym)
1710 if (hdr->sh_info * hdr->sh_entsize > hdr->sh_size)
1712 if (hdr->sh_size != 0)
1714 /* Some linkers erroneously set sh_info to one with a
1715 zero sh_size. ld sees this as a global symbol count
1716 of (unsigned) -1. Fix it here. */
1720 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1721 elf_dynsymtab (abfd) = shindex;
1722 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1723 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1724 abfd->flags |= HAS_SYMS;
1726 /* Besides being a symbol table, we also treat this as a regular
1727 section, so that objcopy can handle it. */
1728 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1730 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1731 if (elf_symtab_shndx (abfd) == shindex)
1734 BFD_ASSERT (elf_symtab_shndx (abfd) == 0);
1735 elf_symtab_shndx (abfd) = shindex;
1736 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1737 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1740 case SHT_STRTAB: /* A string table */
1741 if (hdr->bfd_section != NULL)
1743 if (ehdr->e_shstrndx == shindex)
1745 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1746 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1749 if (elf_elfsections (abfd)[elf_onesymtab (abfd)]->sh_link == shindex)
1752 elf_tdata (abfd)->strtab_hdr = *hdr;
1753 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr;
1756 if (elf_elfsections (abfd)[elf_dynsymtab (abfd)]->sh_link == shindex)
1759 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1760 hdr = &elf_tdata (abfd)->dynstrtab_hdr;
1761 elf_elfsections (abfd)[shindex] = hdr;
1762 /* We also treat this as a regular section, so that objcopy
1764 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1768 /* If the string table isn't one of the above, then treat it as a
1769 regular section. We need to scan all the headers to be sure,
1770 just in case this strtab section appeared before the above. */
1771 if (elf_onesymtab (abfd) == 0 || elf_dynsymtab (abfd) == 0)
1773 unsigned int i, num_sec;
1775 num_sec = elf_numsections (abfd);
1776 for (i = 1; i < num_sec; i++)
1778 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1779 if (hdr2->sh_link == shindex)
1781 /* Prevent endless recursion on broken objects. */
1784 if (! bfd_section_from_shdr (abfd, i))
1786 if (elf_onesymtab (abfd) == i)
1788 if (elf_dynsymtab (abfd) == i)
1789 goto dynsymtab_strtab;
1793 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1797 /* *These* do a lot of work -- but build no sections! */
1799 asection *target_sect;
1800 Elf_Internal_Shdr *hdr2, **p_hdr;
1801 unsigned int num_sec = elf_numsections (abfd);
1802 struct bfd_elf_section_data *esdt;
1806 != (bfd_size_type) (hdr->sh_type == SHT_REL
1807 ? bed->s->sizeof_rel : bed->s->sizeof_rela))
1810 /* Check for a bogus link to avoid crashing. */
1811 if (hdr->sh_link >= num_sec)
1813 ((*_bfd_error_handler)
1814 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1815 abfd, hdr->sh_link, name, shindex));
1816 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1820 /* For some incomprehensible reason Oracle distributes
1821 libraries for Solaris in which some of the objects have
1822 bogus sh_link fields. It would be nice if we could just
1823 reject them, but, unfortunately, some people need to use
1824 them. We scan through the section headers; if we find only
1825 one suitable symbol table, we clobber the sh_link to point
1826 to it. I hope this doesn't break anything.
1828 Don't do it on executable nor shared library. */
1829 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0
1830 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1831 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1837 for (scan = 1; scan < num_sec; scan++)
1839 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1840 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1851 hdr->sh_link = found;
1854 /* Get the symbol table. */
1855 if ((elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1856 || elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_DYNSYM)
1857 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1860 /* If this reloc section does not use the main symbol table we
1861 don't treat it as a reloc section. BFD can't adequately
1862 represent such a section, so at least for now, we don't
1863 try. We just present it as a normal section. We also
1864 can't use it as a reloc section if it points to the null
1865 section, an invalid section, another reloc section, or its
1866 sh_link points to the null section. */
1867 if (hdr->sh_link != elf_onesymtab (abfd)
1868 || hdr->sh_link == SHN_UNDEF
1869 || hdr->sh_info == SHN_UNDEF
1870 || hdr->sh_info >= num_sec
1871 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_REL
1872 || elf_elfsections (abfd)[hdr->sh_info]->sh_type == SHT_RELA)
1873 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1876 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1878 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1879 if (target_sect == NULL)
1882 esdt = elf_section_data (target_sect);
1883 if (hdr->sh_type == SHT_RELA)
1884 p_hdr = &esdt->rela.hdr;
1886 p_hdr = &esdt->rel.hdr;
1888 BFD_ASSERT (*p_hdr == NULL);
1889 amt = sizeof (*hdr2);
1890 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1895 elf_elfsections (abfd)[shindex] = hdr2;
1896 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1897 target_sect->flags |= SEC_RELOC;
1898 target_sect->relocation = NULL;
1899 target_sect->rel_filepos = hdr->sh_offset;
1900 /* In the section to which the relocations apply, mark whether
1901 its relocations are of the REL or RELA variety. */
1902 if (hdr->sh_size != 0)
1904 if (hdr->sh_type == SHT_RELA)
1905 target_sect->use_rela_p = 1;
1907 abfd->flags |= HAS_RELOC;
1911 case SHT_GNU_verdef:
1912 elf_dynverdef (abfd) = shindex;
1913 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1914 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1916 case SHT_GNU_versym:
1917 if (hdr->sh_entsize != sizeof (Elf_External_Versym))
1919 elf_dynversym (abfd) = shindex;
1920 elf_tdata (abfd)->dynversym_hdr = *hdr;
1921 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1923 case SHT_GNU_verneed:
1924 elf_dynverref (abfd) = shindex;
1925 elf_tdata (abfd)->dynverref_hdr = *hdr;
1926 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
1932 if (! IS_VALID_GROUP_SECTION_HEADER (hdr))
1934 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1936 if (hdr->contents != NULL)
1938 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1939 unsigned int n_elt = hdr->sh_size / GRP_ENTRY_SIZE;
1942 if (idx->flags & GRP_COMDAT)
1943 hdr->bfd_section->flags
1944 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1946 /* We try to keep the same section order as it comes in. */
1948 while (--n_elt != 0)
1952 if (idx->shdr != NULL
1953 && (s = idx->shdr->bfd_section) != NULL
1954 && elf_next_in_group (s) != NULL)
1956 elf_next_in_group (hdr->bfd_section) = s;
1964 /* Possibly an attributes section. */
1965 if (hdr->sh_type == SHT_GNU_ATTRIBUTES
1966 || hdr->sh_type == bed->obj_attrs_section_type)
1968 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1970 _bfd_elf_parse_attributes (abfd, hdr);
1974 /* Check for any processor-specific section types. */
1975 if (bed->elf_backend_section_from_shdr (abfd, hdr, name, shindex))
1978 if (hdr->sh_type >= SHT_LOUSER && hdr->sh_type <= SHT_HIUSER)
1980 if ((hdr->sh_flags & SHF_ALLOC) != 0)
1981 /* FIXME: How to properly handle allocated section reserved
1982 for applications? */
1983 (*_bfd_error_handler)
1984 (_("%B: don't know how to handle allocated, application "
1985 "specific section `%s' [0x%8x]"),
1986 abfd, name, hdr->sh_type);
1988 /* Allow sections reserved for applications. */
1989 return _bfd_elf_make_section_from_shdr (abfd, hdr, name,
1992 else if (hdr->sh_type >= SHT_LOPROC
1993 && hdr->sh_type <= SHT_HIPROC)
1994 /* FIXME: We should handle this section. */
1995 (*_bfd_error_handler)
1996 (_("%B: don't know how to handle processor specific section "
1998 abfd, name, hdr->sh_type);
1999 else if (hdr->sh_type >= SHT_LOOS && hdr->sh_type <= SHT_HIOS)
2001 /* Unrecognised OS-specific sections. */
2002 if ((hdr->sh_flags & SHF_OS_NONCONFORMING) != 0)
2003 /* SHF_OS_NONCONFORMING indicates that special knowledge is
2004 required to correctly process the section and the file should
2005 be rejected with an error message. */
2006 (*_bfd_error_handler)
2007 (_("%B: don't know how to handle OS specific section "
2009 abfd, name, hdr->sh_type);
2011 /* Otherwise it should be processed. */
2012 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2015 /* FIXME: We should handle this section. */
2016 (*_bfd_error_handler)
2017 (_("%B: don't know how to handle section `%s' [0x%8x]"),
2018 abfd, name, hdr->sh_type);
2026 /* Return the local symbol specified by ABFD, R_SYMNDX. */
2029 bfd_sym_from_r_symndx (struct sym_cache *cache,
2031 unsigned long r_symndx)
2033 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
2035 if (cache->abfd != abfd || cache->indx[ent] != r_symndx)
2037 Elf_Internal_Shdr *symtab_hdr;
2038 unsigned char esym[sizeof (Elf64_External_Sym)];
2039 Elf_External_Sym_Shndx eshndx;
2041 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2042 if (bfd_elf_get_elf_syms (abfd, symtab_hdr, 1, r_symndx,
2043 &cache->sym[ent], esym, &eshndx) == NULL)
2046 if (cache->abfd != abfd)
2048 memset (cache->indx, -1, sizeof (cache->indx));
2051 cache->indx[ent] = r_symndx;
2054 return &cache->sym[ent];
2057 /* Given an ELF section number, retrieve the corresponding BFD
2061 bfd_section_from_elf_index (bfd *abfd, unsigned int sec_index)
2063 if (sec_index >= elf_numsections (abfd))
2065 return elf_elfsections (abfd)[sec_index]->bfd_section;
2068 static const struct bfd_elf_special_section special_sections_b[] =
2070 { STRING_COMMA_LEN (".bss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2071 { NULL, 0, 0, 0, 0 }
2074 static const struct bfd_elf_special_section special_sections_c[] =
2076 { STRING_COMMA_LEN (".comment"), 0, SHT_PROGBITS, 0 },
2077 { NULL, 0, 0, 0, 0 }
2080 static const struct bfd_elf_special_section special_sections_d[] =
2082 { STRING_COMMA_LEN (".data"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2083 { STRING_COMMA_LEN (".data1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2084 { STRING_COMMA_LEN (".debug"), 0, SHT_PROGBITS, 0 },
2085 { STRING_COMMA_LEN (".debug_line"), 0, SHT_PROGBITS, 0 },
2086 { STRING_COMMA_LEN (".debug_info"), 0, SHT_PROGBITS, 0 },
2087 { STRING_COMMA_LEN (".debug_abbrev"), 0, SHT_PROGBITS, 0 },
2088 { STRING_COMMA_LEN (".debug_aranges"), 0, SHT_PROGBITS, 0 },
2089 { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, SHF_ALLOC },
2090 { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, SHF_ALLOC },
2091 { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, SHF_ALLOC },
2092 { NULL, 0, 0, 0, 0 }
2095 static const struct bfd_elf_special_section special_sections_f[] =
2097 { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2098 { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
2099 { NULL, 0, 0, 0, 0 }
2102 static const struct bfd_elf_special_section special_sections_g[] =
2104 { STRING_COMMA_LEN (".gnu.linkonce.b"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2105 { STRING_COMMA_LEN (".gnu.lto_"), -1, SHT_PROGBITS, SHF_EXCLUDE },
2106 { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2107 { STRING_COMMA_LEN (".gnu.version"), 0, SHT_GNU_versym, 0 },
2108 { STRING_COMMA_LEN (".gnu.version_d"), 0, SHT_GNU_verdef, 0 },
2109 { STRING_COMMA_LEN (".gnu.version_r"), 0, SHT_GNU_verneed, 0 },
2110 { STRING_COMMA_LEN (".gnu.liblist"), 0, SHT_GNU_LIBLIST, SHF_ALLOC },
2111 { STRING_COMMA_LEN (".gnu.conflict"), 0, SHT_RELA, SHF_ALLOC },
2112 { STRING_COMMA_LEN (".gnu.hash"), 0, SHT_GNU_HASH, SHF_ALLOC },
2113 { NULL, 0, 0, 0, 0 }
2116 static const struct bfd_elf_special_section special_sections_h[] =
2118 { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, SHF_ALLOC },
2119 { NULL, 0, 0, 0, 0 }
2122 static const struct bfd_elf_special_section special_sections_i[] =
2124 { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2125 { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2126 { STRING_COMMA_LEN (".interp"), 0, SHT_PROGBITS, 0 },
2127 { NULL, 0, 0, 0, 0 }
2130 static const struct bfd_elf_special_section special_sections_l[] =
2132 { STRING_COMMA_LEN (".line"), 0, SHT_PROGBITS, 0 },
2133 { NULL, 0, 0, 0, 0 }
2136 static const struct bfd_elf_special_section special_sections_n[] =
2138 { STRING_COMMA_LEN (".note.GNU-stack"), 0, SHT_PROGBITS, 0 },
2139 { STRING_COMMA_LEN (".note"), -1, SHT_NOTE, 0 },
2140 { NULL, 0, 0, 0, 0 }
2143 static const struct bfd_elf_special_section special_sections_p[] =
2145 { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
2146 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2147 { NULL, 0, 0, 0, 0 }
2150 static const struct bfd_elf_special_section special_sections_r[] =
2152 { STRING_COMMA_LEN (".rodata"), -2, SHT_PROGBITS, SHF_ALLOC },
2153 { STRING_COMMA_LEN (".rodata1"), 0, SHT_PROGBITS, SHF_ALLOC },
2154 { STRING_COMMA_LEN (".rela"), -1, SHT_RELA, 0 },
2155 { STRING_COMMA_LEN (".rel"), -1, SHT_REL, 0 },
2156 { NULL, 0, 0, 0, 0 }
2159 static const struct bfd_elf_special_section special_sections_s[] =
2161 { STRING_COMMA_LEN (".shstrtab"), 0, SHT_STRTAB, 0 },
2162 { STRING_COMMA_LEN (".strtab"), 0, SHT_STRTAB, 0 },
2163 { STRING_COMMA_LEN (".symtab"), 0, SHT_SYMTAB, 0 },
2164 /* See struct bfd_elf_special_section declaration for the semantics of
2165 this special case where .prefix_length != strlen (.prefix). */
2166 { ".stabstr", 5, 3, SHT_STRTAB, 0 },
2167 { NULL, 0, 0, 0, 0 }
2170 static const struct bfd_elf_special_section special_sections_t[] =
2172 { STRING_COMMA_LEN (".text"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
2173 { STRING_COMMA_LEN (".tbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2174 { STRING_COMMA_LEN (".tdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
2175 { NULL, 0, 0, 0, 0 }
2178 static const struct bfd_elf_special_section special_sections_z[] =
2180 { STRING_COMMA_LEN (".zdebug_line"), 0, SHT_PROGBITS, 0 },
2181 { STRING_COMMA_LEN (".zdebug_info"), 0, SHT_PROGBITS, 0 },
2182 { STRING_COMMA_LEN (".zdebug_abbrev"), 0, SHT_PROGBITS, 0 },
2183 { STRING_COMMA_LEN (".zdebug_aranges"), 0, SHT_PROGBITS, 0 },
2184 { NULL, 0, 0, 0, 0 }
2187 static const struct bfd_elf_special_section * const special_sections[] =
2189 special_sections_b, /* 'b' */
2190 special_sections_c, /* 'c' */
2191 special_sections_d, /* 'd' */
2193 special_sections_f, /* 'f' */
2194 special_sections_g, /* 'g' */
2195 special_sections_h, /* 'h' */
2196 special_sections_i, /* 'i' */
2199 special_sections_l, /* 'l' */
2201 special_sections_n, /* 'n' */
2203 special_sections_p, /* 'p' */
2205 special_sections_r, /* 'r' */
2206 special_sections_s, /* 's' */
2207 special_sections_t, /* 't' */
2213 special_sections_z /* 'z' */
2216 const struct bfd_elf_special_section *
2217 _bfd_elf_get_special_section (const char *name,
2218 const struct bfd_elf_special_section *spec,
2224 len = strlen (name);
2226 for (i = 0; spec[i].prefix != NULL; i++)
2229 int prefix_len = spec[i].prefix_length;
2231 if (len < prefix_len)
2233 if (memcmp (name, spec[i].prefix, prefix_len) != 0)
2236 suffix_len = spec[i].suffix_length;
2237 if (suffix_len <= 0)
2239 if (name[prefix_len] != 0)
2241 if (suffix_len == 0)
2243 if (name[prefix_len] != '.'
2244 && (suffix_len == -2
2245 || (rela && spec[i].type == SHT_REL)))
2251 if (len < prefix_len + suffix_len)
2253 if (memcmp (name + len - suffix_len,
2254 spec[i].prefix + prefix_len,
2264 const struct bfd_elf_special_section *
2265 _bfd_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2268 const struct bfd_elf_special_section *spec;
2269 const struct elf_backend_data *bed;
2271 /* See if this is one of the special sections. */
2272 if (sec->name == NULL)
2275 bed = get_elf_backend_data (abfd);
2276 spec = bed->special_sections;
2279 spec = _bfd_elf_get_special_section (sec->name,
2280 bed->special_sections,
2286 if (sec->name[0] != '.')
2289 i = sec->name[1] - 'b';
2290 if (i < 0 || i > 'z' - 'b')
2293 spec = special_sections[i];
2298 return _bfd_elf_get_special_section (sec->name, spec, sec->use_rela_p);
2302 _bfd_elf_new_section_hook (bfd *abfd, asection *sec)
2304 struct bfd_elf_section_data *sdata;
2305 const struct elf_backend_data *bed;
2306 const struct bfd_elf_special_section *ssect;
2308 sdata = (struct bfd_elf_section_data *) sec->used_by_bfd;
2311 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd,
2315 sec->used_by_bfd = sdata;
2318 /* Indicate whether or not this section should use RELA relocations. */
2319 bed = get_elf_backend_data (abfd);
2320 sec->use_rela_p = bed->default_use_rela_p;
2322 /* When we read a file, we don't need to set ELF section type and
2323 flags. They will be overridden in _bfd_elf_make_section_from_shdr
2324 anyway. We will set ELF section type and flags for all linker
2325 created sections. If user specifies BFD section flags, we will
2326 set ELF section type and flags based on BFD section flags in
2327 elf_fake_sections. Special handling for .init_array/.fini_array
2328 output sections since they may contain .ctors/.dtors input
2329 sections. We don't want _bfd_elf_init_private_section_data to
2330 copy ELF section type from .ctors/.dtors input sections. */
2331 if (abfd->direction != read_direction
2332 || (sec->flags & SEC_LINKER_CREATED) != 0)
2334 ssect = (*bed->get_sec_type_attr) (abfd, sec);
2337 || (sec->flags & SEC_LINKER_CREATED) != 0
2338 || ssect->type == SHT_INIT_ARRAY
2339 || ssect->type == SHT_FINI_ARRAY))
2341 elf_section_type (sec) = ssect->type;
2342 elf_section_flags (sec) = ssect->attr;
2346 return _bfd_generic_new_section_hook (abfd, sec);
2349 /* Create a new bfd section from an ELF program header.
2351 Since program segments have no names, we generate a synthetic name
2352 of the form segment<NUM>, where NUM is generally the index in the
2353 program header table. For segments that are split (see below) we
2354 generate the names segment<NUM>a and segment<NUM>b.
2356 Note that some program segments may have a file size that is different than
2357 (less than) the memory size. All this means is that at execution the
2358 system must allocate the amount of memory specified by the memory size,
2359 but only initialize it with the first "file size" bytes read from the
2360 file. This would occur for example, with program segments consisting
2361 of combined data+bss.
2363 To handle the above situation, this routine generates TWO bfd sections
2364 for the single program segment. The first has the length specified by
2365 the file size of the segment, and the second has the length specified
2366 by the difference between the two sizes. In effect, the segment is split
2367 into its initialized and uninitialized parts.
2372 _bfd_elf_make_section_from_phdr (bfd *abfd,
2373 Elf_Internal_Phdr *hdr,
2375 const char *type_name)
2383 split = ((hdr->p_memsz > 0)
2384 && (hdr->p_filesz > 0)
2385 && (hdr->p_memsz > hdr->p_filesz));
2387 if (hdr->p_filesz > 0)
2389 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "a" : "");
2390 len = strlen (namebuf) + 1;
2391 name = (char *) bfd_alloc (abfd, len);
2394 memcpy (name, namebuf, len);
2395 newsect = bfd_make_section (abfd, name);
2396 if (newsect == NULL)
2398 newsect->vma = hdr->p_vaddr;
2399 newsect->lma = hdr->p_paddr;
2400 newsect->size = hdr->p_filesz;
2401 newsect->filepos = hdr->p_offset;
2402 newsect->flags |= SEC_HAS_CONTENTS;
2403 newsect->alignment_power = bfd_log2 (hdr->p_align);
2404 if (hdr->p_type == PT_LOAD)
2406 newsect->flags |= SEC_ALLOC;
2407 newsect->flags |= SEC_LOAD;
2408 if (hdr->p_flags & PF_X)
2410 /* FIXME: all we known is that it has execute PERMISSION,
2412 newsect->flags |= SEC_CODE;
2415 if (!(hdr->p_flags & PF_W))
2417 newsect->flags |= SEC_READONLY;
2421 if (hdr->p_memsz > hdr->p_filesz)
2425 sprintf (namebuf, "%s%d%s", type_name, hdr_index, split ? "b" : "");
2426 len = strlen (namebuf) + 1;
2427 name = (char *) bfd_alloc (abfd, len);
2430 memcpy (name, namebuf, len);
2431 newsect = bfd_make_section (abfd, name);
2432 if (newsect == NULL)
2434 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2435 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2436 newsect->size = hdr->p_memsz - hdr->p_filesz;
2437 newsect->filepos = hdr->p_offset + hdr->p_filesz;
2438 align = newsect->vma & -newsect->vma;
2439 if (align == 0 || align > hdr->p_align)
2440 align = hdr->p_align;
2441 newsect->alignment_power = bfd_log2 (align);
2442 if (hdr->p_type == PT_LOAD)
2444 /* Hack for gdb. Segments that have not been modified do
2445 not have their contents written to a core file, on the
2446 assumption that a debugger can find the contents in the
2447 executable. We flag this case by setting the fake
2448 section size to zero. Note that "real" bss sections will
2449 always have their contents dumped to the core file. */
2450 if (bfd_get_format (abfd) == bfd_core)
2452 newsect->flags |= SEC_ALLOC;
2453 if (hdr->p_flags & PF_X)
2454 newsect->flags |= SEC_CODE;
2456 if (!(hdr->p_flags & PF_W))
2457 newsect->flags |= SEC_READONLY;
2464 bfd_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int hdr_index)
2466 const struct elf_backend_data *bed;
2468 switch (hdr->p_type)
2471 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "null");
2474 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "load");
2477 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "dynamic");
2480 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "interp");
2483 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "note"))
2485 if (! elf_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
2490 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "shlib");
2493 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "phdr");
2495 case PT_GNU_EH_FRAME:
2496 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index,
2500 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "stack");
2503 return _bfd_elf_make_section_from_phdr (abfd, hdr, hdr_index, "relro");
2506 /* Check for any processor-specific program segment types. */
2507 bed = get_elf_backend_data (abfd);
2508 return bed->elf_backend_section_from_phdr (abfd, hdr, hdr_index, "proc");
2512 /* Return the REL_HDR for SEC, assuming there is only a single one, either
2516 _bfd_elf_single_rel_hdr (asection *sec)
2518 if (elf_section_data (sec)->rel.hdr)
2520 BFD_ASSERT (elf_section_data (sec)->rela.hdr == NULL);
2521 return elf_section_data (sec)->rel.hdr;
2524 return elf_section_data (sec)->rela.hdr;
2527 /* Allocate and initialize a section-header for a new reloc section,
2528 containing relocations against ASECT. It is stored in RELDATA. If
2529 USE_RELA_P is TRUE, we use RELA relocations; otherwise, we use REL
2533 _bfd_elf_init_reloc_shdr (bfd *abfd,
2534 struct bfd_elf_section_reloc_data *reldata,
2536 bfd_boolean use_rela_p)
2538 Elf_Internal_Shdr *rel_hdr;
2540 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2543 amt = sizeof (Elf_Internal_Shdr);
2544 BFD_ASSERT (reldata->hdr == NULL);
2545 rel_hdr = bfd_zalloc (abfd, amt);
2546 reldata->hdr = rel_hdr;
2548 amt = sizeof ".rela" + strlen (asect->name);
2549 name = (char *) bfd_alloc (abfd, amt);
2552 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2554 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2556 if (rel_hdr->sh_name == (unsigned int) -1)
2558 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2559 rel_hdr->sh_entsize = (use_rela_p
2560 ? bed->s->sizeof_rela
2561 : bed->s->sizeof_rel);
2562 rel_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
2563 rel_hdr->sh_flags = 0;
2564 rel_hdr->sh_addr = 0;
2565 rel_hdr->sh_size = 0;
2566 rel_hdr->sh_offset = 0;
2571 /* Return the default section type based on the passed in section flags. */
2574 bfd_elf_get_default_section_type (flagword flags)
2576 if ((flags & SEC_ALLOC) != 0
2577 && (flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2579 return SHT_PROGBITS;
2582 struct fake_section_arg
2584 struct bfd_link_info *link_info;
2588 /* Set up an ELF internal section header for a section. */
2591 elf_fake_sections (bfd *abfd, asection *asect, void *fsarg)
2593 struct fake_section_arg *arg = (struct fake_section_arg *)fsarg;
2594 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2595 struct bfd_elf_section_data *esd = elf_section_data (asect);
2596 Elf_Internal_Shdr *this_hdr;
2597 unsigned int sh_type;
2601 /* We already failed; just get out of the bfd_map_over_sections
2606 this_hdr = &esd->this_hdr;
2608 this_hdr->sh_name = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2609 asect->name, FALSE);
2610 if (this_hdr->sh_name == (unsigned int) -1)
2616 /* Don't clear sh_flags. Assembler may set additional bits. */
2618 if ((asect->flags & SEC_ALLOC) != 0
2619 || asect->user_set_vma)
2620 this_hdr->sh_addr = asect->vma;
2622 this_hdr->sh_addr = 0;
2624 this_hdr->sh_offset = 0;
2625 this_hdr->sh_size = asect->size;
2626 this_hdr->sh_link = 0;
2627 this_hdr->sh_addralign = (bfd_vma) 1 << asect->alignment_power;
2628 /* The sh_entsize and sh_info fields may have been set already by
2629 copy_private_section_data. */
2631 this_hdr->bfd_section = asect;
2632 this_hdr->contents = NULL;
2634 /* If the section type is unspecified, we set it based on
2636 if ((asect->flags & SEC_GROUP) != 0)
2637 sh_type = SHT_GROUP;
2639 sh_type = bfd_elf_get_default_section_type (asect->flags);
2641 if (this_hdr->sh_type == SHT_NULL)
2642 this_hdr->sh_type = sh_type;
2643 else if (this_hdr->sh_type == SHT_NOBITS
2644 && sh_type == SHT_PROGBITS
2645 && (asect->flags & SEC_ALLOC) != 0)
2647 /* Warn if we are changing a NOBITS section to PROGBITS, but
2648 allow the link to proceed. This can happen when users link
2649 non-bss input sections to bss output sections, or emit data
2650 to a bss output section via a linker script. */
2651 (*_bfd_error_handler)
2652 (_("warning: section `%A' type changed to PROGBITS"), asect);
2653 this_hdr->sh_type = sh_type;
2656 switch (this_hdr->sh_type)
2662 case SHT_INIT_ARRAY:
2663 case SHT_FINI_ARRAY:
2664 case SHT_PREINIT_ARRAY:
2671 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2675 this_hdr->sh_entsize = bed->s->sizeof_sym;
2679 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2683 if (get_elf_backend_data (abfd)->may_use_rela_p)
2684 this_hdr->sh_entsize = bed->s->sizeof_rela;
2688 if (get_elf_backend_data (abfd)->may_use_rel_p)
2689 this_hdr->sh_entsize = bed->s->sizeof_rel;
2692 case SHT_GNU_versym:
2693 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2696 case SHT_GNU_verdef:
2697 this_hdr->sh_entsize = 0;
2698 /* objcopy or strip will copy over sh_info, but may not set
2699 cverdefs. The linker will set cverdefs, but sh_info will be
2701 if (this_hdr->sh_info == 0)
2702 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2704 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2705 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2708 case SHT_GNU_verneed:
2709 this_hdr->sh_entsize = 0;
2710 /* objcopy or strip will copy over sh_info, but may not set
2711 cverrefs. The linker will set cverrefs, but sh_info will be
2713 if (this_hdr->sh_info == 0)
2714 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2716 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2717 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2721 this_hdr->sh_entsize = GRP_ENTRY_SIZE;
2725 this_hdr->sh_entsize = bed->s->arch_size == 64 ? 0 : 4;
2729 if ((asect->flags & SEC_ALLOC) != 0)
2730 this_hdr->sh_flags |= SHF_ALLOC;
2731 if ((asect->flags & SEC_READONLY) == 0)
2732 this_hdr->sh_flags |= SHF_WRITE;
2733 if ((asect->flags & SEC_CODE) != 0)
2734 this_hdr->sh_flags |= SHF_EXECINSTR;
2735 if ((asect->flags & SEC_MERGE) != 0)
2737 this_hdr->sh_flags |= SHF_MERGE;
2738 this_hdr->sh_entsize = asect->entsize;
2739 if ((asect->flags & SEC_STRINGS) != 0)
2740 this_hdr->sh_flags |= SHF_STRINGS;
2742 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2743 this_hdr->sh_flags |= SHF_GROUP;
2744 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2746 this_hdr->sh_flags |= SHF_TLS;
2747 if (asect->size == 0
2748 && (asect->flags & SEC_HAS_CONTENTS) == 0)
2750 struct bfd_link_order *o = asect->map_tail.link_order;
2752 this_hdr->sh_size = 0;
2755 this_hdr->sh_size = o->offset + o->size;
2756 if (this_hdr->sh_size != 0)
2757 this_hdr->sh_type = SHT_NOBITS;
2761 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
2762 this_hdr->sh_flags |= SHF_EXCLUDE;
2764 /* If the section has relocs, set up a section header for the
2765 SHT_REL[A] section. If two relocation sections are required for
2766 this section, it is up to the processor-specific back-end to
2767 create the other. */
2768 if ((asect->flags & SEC_RELOC) != 0)
2770 /* When doing a relocatable link, create both REL and RELA sections if
2773 /* Do the normal setup if we wouldn't create any sections here. */
2774 && esd->rel.count + esd->rela.count > 0
2775 && (arg->link_info->relocatable || arg->link_info->emitrelocations))
2777 if (esd->rel.count && esd->rel.hdr == NULL
2778 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rel, asect, FALSE))
2783 if (esd->rela.count && esd->rela.hdr == NULL
2784 && !_bfd_elf_init_reloc_shdr (abfd, &esd->rela, asect, TRUE))
2790 else if (!_bfd_elf_init_reloc_shdr (abfd,
2792 ? &esd->rela : &esd->rel),
2798 /* Check for processor-specific section types. */
2799 sh_type = this_hdr->sh_type;
2800 if (bed->elf_backend_fake_sections
2801 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2804 if (sh_type == SHT_NOBITS && asect->size != 0)
2806 /* Don't change the header type from NOBITS if we are being
2807 called for objcopy --only-keep-debug. */
2808 this_hdr->sh_type = sh_type;
2812 /* Fill in the contents of a SHT_GROUP section. Called from
2813 _bfd_elf_compute_section_file_positions for gas, objcopy, and
2814 when ELF targets use the generic linker, ld. Called for ld -r
2815 from bfd_elf_final_link. */
2818 bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
2820 bfd_boolean *failedptr = (bfd_boolean *) failedptrarg;
2821 asection *elt, *first;
2825 /* Ignore linker created group section. See elfNN_ia64_object_p in
2827 if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
2831 if (elf_section_data (sec)->this_hdr.sh_info == 0)
2833 unsigned long symindx = 0;
2835 /* elf_group_id will have been set up by objcopy and the
2837 if (elf_group_id (sec) != NULL)
2838 symindx = elf_group_id (sec)->udata.i;
2842 /* If called from the assembler, swap_out_syms will have set up
2843 elf_section_syms. */
2844 BFD_ASSERT (elf_section_syms (abfd) != NULL);
2845 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2847 elf_section_data (sec)->this_hdr.sh_info = symindx;
2849 else if (elf_section_data (sec)->this_hdr.sh_info == (unsigned int) -2)
2851 /* The ELF backend linker sets sh_info to -2 when the group
2852 signature symbol is global, and thus the index can't be
2853 set until all local symbols are output. */
2854 asection *igroup = elf_sec_group (elf_next_in_group (sec));
2855 struct bfd_elf_section_data *sec_data = elf_section_data (igroup);
2856 unsigned long symndx = sec_data->this_hdr.sh_info;
2857 unsigned long extsymoff = 0;
2858 struct elf_link_hash_entry *h;
2860 if (!elf_bad_symtab (igroup->owner))
2862 Elf_Internal_Shdr *symtab_hdr;
2864 symtab_hdr = &elf_tdata (igroup->owner)->symtab_hdr;
2865 extsymoff = symtab_hdr->sh_info;
2867 h = elf_sym_hashes (igroup->owner)[symndx - extsymoff];
2868 while (h->root.type == bfd_link_hash_indirect
2869 || h->root.type == bfd_link_hash_warning)
2870 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2872 elf_section_data (sec)->this_hdr.sh_info = h->indx;
2875 /* The contents won't be allocated for "ld -r" or objcopy. */
2877 if (sec->contents == NULL)
2880 sec->contents = (unsigned char *) bfd_alloc (abfd, sec->size);
2882 /* Arrange for the section to be written out. */
2883 elf_section_data (sec)->this_hdr.contents = sec->contents;
2884 if (sec->contents == NULL)
2891 loc = sec->contents + sec->size;
2893 /* Get the pointer to the first section in the group that gas
2894 squirreled away here. objcopy arranges for this to be set to the
2895 start of the input section group. */
2896 first = elt = elf_next_in_group (sec);
2898 /* First element is a flag word. Rest of section is elf section
2899 indices for all the sections of the group. Write them backwards
2900 just to keep the group in the same order as given in .section
2901 directives, not that it matters. */
2908 s = s->output_section;
2910 && !bfd_is_abs_section (s))
2912 unsigned int idx = elf_section_data (s)->this_idx;
2915 H_PUT_32 (abfd, idx, loc);
2917 elt = elf_next_in_group (elt);
2922 if ((loc -= 4) != sec->contents)
2925 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2928 /* Assign all ELF section numbers. The dummy first section is handled here
2929 too. The link/info pointers for the standard section types are filled
2930 in here too, while we're at it. */
2933 assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
2935 struct elf_obj_tdata *t = elf_tdata (abfd);
2937 unsigned int section_number, secn;
2938 Elf_Internal_Shdr **i_shdrp;
2939 struct bfd_elf_section_data *d;
2940 bfd_boolean need_symtab;
2944 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2946 /* SHT_GROUP sections are in relocatable files only. */
2947 if (link_info == NULL || link_info->relocatable)
2949 /* Put SHT_GROUP sections first. */
2950 for (sec = abfd->sections; sec != NULL; sec = sec->next)
2952 d = elf_section_data (sec);
2954 if (d->this_hdr.sh_type == SHT_GROUP)
2956 if (sec->flags & SEC_LINKER_CREATED)
2958 /* Remove the linker created SHT_GROUP sections. */
2959 bfd_section_list_remove (abfd, sec);
2960 abfd->section_count--;
2963 d->this_idx = section_number++;
2968 for (sec = abfd->sections; sec; sec = sec->next)
2970 d = elf_section_data (sec);
2972 if (d->this_hdr.sh_type != SHT_GROUP)
2973 d->this_idx = section_number++;
2974 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2977 d->rel.idx = section_number++;
2978 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel.hdr->sh_name);
2985 d->rela.idx = section_number++;
2986 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rela.hdr->sh_name);
2992 t->shstrtab_section = section_number++;
2993 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2994 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2996 need_symtab = (bfd_get_symcount (abfd) > 0
2997 || (link_info == NULL
2998 && ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3002 t->symtab_section = section_number++;
3003 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
3004 if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
3006 t->symtab_shndx_section = section_number++;
3007 t->symtab_shndx_hdr.sh_name
3008 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
3009 ".symtab_shndx", FALSE);
3010 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
3013 t->strtab_section = section_number++;
3014 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
3017 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
3018 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3020 elf_numsections (abfd) = section_number;
3021 elf_elfheader (abfd)->e_shnum = section_number;
3023 /* Set up the list of section header pointers, in agreement with the
3025 i_shdrp = (Elf_Internal_Shdr **) bfd_zalloc2 (abfd, section_number,
3026 sizeof (Elf_Internal_Shdr *));
3027 if (i_shdrp == NULL)
3030 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_zalloc (abfd,
3031 sizeof (Elf_Internal_Shdr));
3032 if (i_shdrp[0] == NULL)
3034 bfd_release (abfd, i_shdrp);
3038 elf_elfsections (abfd) = i_shdrp;
3040 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
3043 i_shdrp[t->symtab_section] = &t->symtab_hdr;
3044 if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF))
3046 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
3047 t->symtab_shndx_hdr.sh_link = t->symtab_section;
3049 i_shdrp[t->strtab_section] = &t->strtab_hdr;
3050 t->symtab_hdr.sh_link = t->strtab_section;
3053 for (sec = abfd->sections; sec; sec = sec->next)
3058 d = elf_section_data (sec);
3060 i_shdrp[d->this_idx] = &d->this_hdr;
3061 if (d->rel.idx != 0)
3062 i_shdrp[d->rel.idx] = d->rel.hdr;
3063 if (d->rela.idx != 0)
3064 i_shdrp[d->rela.idx] = d->rela.hdr;
3066 /* Fill in the sh_link and sh_info fields while we're at it. */
3068 /* sh_link of a reloc section is the section index of the symbol
3069 table. sh_info is the section index of the section to which
3070 the relocation entries apply. */
3071 if (d->rel.idx != 0)
3073 d->rel.hdr->sh_link = t->symtab_section;
3074 d->rel.hdr->sh_info = d->this_idx;
3076 if (d->rela.idx != 0)
3078 d->rela.hdr->sh_link = t->symtab_section;
3079 d->rela.hdr->sh_info = d->this_idx;
3082 /* We need to set up sh_link for SHF_LINK_ORDER. */
3083 if ((d->this_hdr.sh_flags & SHF_LINK_ORDER) != 0)
3085 s = elf_linked_to_section (sec);
3088 /* elf_linked_to_section points to the input section. */
3089 if (link_info != NULL)
3091 /* Check discarded linkonce section. */
3092 if (discarded_section (s))
3095 (*_bfd_error_handler)
3096 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3097 abfd, d->this_hdr.bfd_section,
3099 /* Point to the kept section if it has the same
3100 size as the discarded one. */
3101 kept = _bfd_elf_check_kept_section (s, link_info);
3104 bfd_set_error (bfd_error_bad_value);
3110 s = s->output_section;
3111 BFD_ASSERT (s != NULL);
3115 /* Handle objcopy. */
3116 if (s->output_section == NULL)
3118 (*_bfd_error_handler)
3119 (_("%B: sh_link of section `%A' points to removed section `%A' of `%B'"),
3120 abfd, d->this_hdr.bfd_section, s, s->owner);
3121 bfd_set_error (bfd_error_bad_value);
3124 s = s->output_section;
3126 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3131 The Intel C compiler generates SHT_IA_64_UNWIND with
3132 SHF_LINK_ORDER. But it doesn't set the sh_link or
3133 sh_info fields. Hence we could get the situation
3135 const struct elf_backend_data *bed
3136 = get_elf_backend_data (abfd);
3137 if (bed->link_order_error_handler)
3138 bed->link_order_error_handler
3139 (_("%B: warning: sh_link not set for section `%A'"),
3144 switch (d->this_hdr.sh_type)
3148 /* A reloc section which we are treating as a normal BFD
3149 section. sh_link is the section index of the symbol
3150 table. sh_info is the section index of the section to
3151 which the relocation entries apply. We assume that an
3152 allocated reloc section uses the dynamic symbol table.
3153 FIXME: How can we be sure? */
3154 s = bfd_get_section_by_name (abfd, ".dynsym");
3156 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3158 /* We look up the section the relocs apply to by name. */
3160 if (d->this_hdr.sh_type == SHT_REL)
3164 s = bfd_get_section_by_name (abfd, name);
3166 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
3170 /* We assume that a section named .stab*str is a stabs
3171 string section. We look for a section with the same name
3172 but without the trailing ``str'', and set its sh_link
3173 field to point to this section. */
3174 if (CONST_STRNEQ (sec->name, ".stab")
3175 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
3180 len = strlen (sec->name);
3181 alc = (char *) bfd_malloc (len - 2);
3184 memcpy (alc, sec->name, len - 3);
3185 alc[len - 3] = '\0';
3186 s = bfd_get_section_by_name (abfd, alc);
3190 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
3192 /* This is a .stab section. */
3193 if (elf_section_data (s)->this_hdr.sh_entsize == 0)
3194 elf_section_data (s)->this_hdr.sh_entsize
3195 = 4 + 2 * bfd_get_arch_size (abfd) / 8;
3202 case SHT_GNU_verneed:
3203 case SHT_GNU_verdef:
3204 /* sh_link is the section header index of the string table
3205 used for the dynamic entries, or the symbol table, or the
3207 s = bfd_get_section_by_name (abfd, ".dynstr");
3209 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3212 case SHT_GNU_LIBLIST:
3213 /* sh_link is the section header index of the prelink library
3214 list used for the dynamic entries, or the symbol table, or
3215 the version strings. */
3216 s = bfd_get_section_by_name (abfd, (sec->flags & SEC_ALLOC)
3217 ? ".dynstr" : ".gnu.libstr");
3219 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3224 case SHT_GNU_versym:
3225 /* sh_link is the section header index of the symbol table
3226 this hash table or version table is for. */
3227 s = bfd_get_section_by_name (abfd, ".dynsym");
3229 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
3233 d->this_hdr.sh_link = t->symtab_section;
3237 for (secn = 1; secn < section_number; ++secn)
3238 if (i_shdrp[secn] == NULL)
3239 i_shdrp[secn] = i_shdrp[0];
3241 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
3242 i_shdrp[secn]->sh_name);
3247 sym_is_global (bfd *abfd, asymbol *sym)
3249 /* If the backend has a special mapping, use it. */
3250 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3251 if (bed->elf_backend_sym_is_global)
3252 return (*bed->elf_backend_sym_is_global) (abfd, sym);
3254 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_GNU_UNIQUE)) != 0
3255 || bfd_is_und_section (bfd_get_section (sym))
3256 || bfd_is_com_section (bfd_get_section (sym)));
3259 /* Don't output section symbols for sections that are not going to be
3260 output, or that are duplicates. */
3263 ignore_section_sym (bfd *abfd, asymbol *sym)
3265 return ((sym->flags & BSF_SECTION_SYM) != 0
3266 && !(sym->section->owner == abfd
3267 || (sym->section->output_section->owner == abfd
3268 && sym->section->output_offset == 0)
3269 || bfd_is_abs_section (sym->section)));
3272 /* Map symbol from it's internal number to the external number, moving
3273 all local symbols to be at the head of the list. */
3276 elf_map_symbols (bfd *abfd)
3278 unsigned int symcount = bfd_get_symcount (abfd);
3279 asymbol **syms = bfd_get_outsymbols (abfd);
3280 asymbol **sect_syms;
3281 unsigned int num_locals = 0;
3282 unsigned int num_globals = 0;
3283 unsigned int num_locals2 = 0;
3284 unsigned int num_globals2 = 0;
3291 fprintf (stderr, "elf_map_symbols\n");
3295 for (asect = abfd->sections; asect; asect = asect->next)
3297 if (max_index < asect->index)
3298 max_index = asect->index;
3302 sect_syms = (asymbol **) bfd_zalloc2 (abfd, max_index, sizeof (asymbol *));
3303 if (sect_syms == NULL)
3305 elf_section_syms (abfd) = sect_syms;
3306 elf_num_section_syms (abfd) = max_index;
3308 /* Init sect_syms entries for any section symbols we have already
3309 decided to output. */
3310 for (idx = 0; idx < symcount; idx++)
3312 asymbol *sym = syms[idx];
3314 if ((sym->flags & BSF_SECTION_SYM) != 0
3316 && !ignore_section_sym (abfd, sym)
3317 && !bfd_is_abs_section (sym->section))
3319 asection *sec = sym->section;
3321 if (sec->owner != abfd)
3322 sec = sec->output_section;
3324 sect_syms[sec->index] = syms[idx];
3328 /* Classify all of the symbols. */
3329 for (idx = 0; idx < symcount; idx++)
3331 if (sym_is_global (abfd, syms[idx]))
3333 else if (!ignore_section_sym (abfd, syms[idx]))
3337 /* We will be adding a section symbol for each normal BFD section. Most
3338 sections will already have a section symbol in outsymbols, but
3339 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3340 at least in that case. */
3341 for (asect = abfd->sections; asect; asect = asect->next)
3343 if (sect_syms[asect->index] == NULL)
3345 if (!sym_is_global (abfd, asect->symbol))
3352 /* Now sort the symbols so the local symbols are first. */
3353 new_syms = (asymbol **) bfd_alloc2 (abfd, num_locals + num_globals,
3354 sizeof (asymbol *));
3356 if (new_syms == NULL)
3359 for (idx = 0; idx < symcount; idx++)
3361 asymbol *sym = syms[idx];
3364 if (sym_is_global (abfd, sym))
3365 i = num_locals + num_globals2++;
3366 else if (!ignore_section_sym (abfd, sym))
3371 sym->udata.i = i + 1;
3373 for (asect = abfd->sections; asect; asect = asect->next)
3375 if (sect_syms[asect->index] == NULL)
3377 asymbol *sym = asect->symbol;
3380 sect_syms[asect->index] = sym;
3381 if (!sym_is_global (abfd, sym))
3384 i = num_locals + num_globals2++;
3386 sym->udata.i = i + 1;
3390 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
3392 elf_num_locals (abfd) = num_locals;
3393 elf_num_globals (abfd) = num_globals;
3397 /* Align to the maximum file alignment that could be required for any
3398 ELF data structure. */
3400 static inline file_ptr
3401 align_file_position (file_ptr off, int align)
3403 return (off + align - 1) & ~(align - 1);
3406 /* Assign a file position to a section, optionally aligning to the
3407 required section alignment. */
3410 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr *i_shdrp,
3414 if (align && i_shdrp->sh_addralign > 1)
3415 offset = BFD_ALIGN (offset, i_shdrp->sh_addralign);
3416 i_shdrp->sh_offset = offset;
3417 if (i_shdrp->bfd_section != NULL)
3418 i_shdrp->bfd_section->filepos = offset;
3419 if (i_shdrp->sh_type != SHT_NOBITS)
3420 offset += i_shdrp->sh_size;
3424 /* Compute the file positions we are going to put the sections at, and
3425 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3426 is not NULL, this is being called by the ELF backend linker. */
3429 _bfd_elf_compute_section_file_positions (bfd *abfd,
3430 struct bfd_link_info *link_info)
3432 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3433 struct fake_section_arg fsargs;
3435 struct bfd_strtab_hash *strtab = NULL;
3436 Elf_Internal_Shdr *shstrtab_hdr;
3437 bfd_boolean need_symtab;
3439 if (abfd->output_has_begun)
3442 /* Do any elf backend specific processing first. */
3443 if (bed->elf_backend_begin_write_processing)
3444 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
3446 if (! prep_headers (abfd))
3449 /* Post process the headers if necessary. */
3450 if (bed->elf_backend_post_process_headers)
3451 (*bed->elf_backend_post_process_headers) (abfd, link_info);
3453 fsargs.failed = FALSE;
3454 fsargs.link_info = link_info;
3455 bfd_map_over_sections (abfd, elf_fake_sections, &fsargs);
3459 if (!assign_section_numbers (abfd, link_info))
3462 /* The backend linker builds symbol table information itself. */
3463 need_symtab = (link_info == NULL
3464 && (bfd_get_symcount (abfd) > 0
3465 || ((abfd->flags & (EXEC_P | DYNAMIC | HAS_RELOC))
3469 /* Non-zero if doing a relocatable link. */
3470 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
3472 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3477 if (link_info == NULL)
3479 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3484 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3485 /* sh_name was set in prep_headers. */
3486 shstrtab_hdr->sh_type = SHT_STRTAB;
3487 shstrtab_hdr->sh_flags = 0;
3488 shstrtab_hdr->sh_addr = 0;
3489 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3490 shstrtab_hdr->sh_entsize = 0;
3491 shstrtab_hdr->sh_link = 0;
3492 shstrtab_hdr->sh_info = 0;
3493 /* sh_offset is set in assign_file_positions_except_relocs. */
3494 shstrtab_hdr->sh_addralign = 1;
3496 if (!assign_file_positions_except_relocs (abfd, link_info))
3502 Elf_Internal_Shdr *hdr;
3504 off = elf_tdata (abfd)->next_file_pos;
3506 hdr = &elf_tdata (abfd)->symtab_hdr;
3507 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3509 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3510 if (hdr->sh_size != 0)
3511 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3513 hdr = &elf_tdata (abfd)->strtab_hdr;
3514 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
3516 elf_tdata (abfd)->next_file_pos = off;
3518 /* Now that we know where the .strtab section goes, write it
3520 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3521 || ! _bfd_stringtab_emit (abfd, strtab))
3523 _bfd_stringtab_free (strtab);
3526 abfd->output_has_begun = TRUE;
3531 /* Make an initial estimate of the size of the program header. If we
3532 get the number wrong here, we'll redo section placement. */
3534 static bfd_size_type
3535 get_program_header_size (bfd *abfd, struct bfd_link_info *info)
3539 const struct elf_backend_data *bed;
3541 /* Assume we will need exactly two PT_LOAD segments: one for text
3542 and one for data. */
3545 s = bfd_get_section_by_name (abfd, ".interp");
3546 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3548 /* If we have a loadable interpreter section, we need a
3549 PT_INTERP segment. In this case, assume we also need a
3550 PT_PHDR segment, although that may not be true for all
3555 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3557 /* We need a PT_DYNAMIC segment. */
3561 if (info != NULL && info->relro)
3563 /* We need a PT_GNU_RELRO segment. */
3567 if (elf_tdata (abfd)->eh_frame_hdr)
3569 /* We need a PT_GNU_EH_FRAME segment. */
3573 if (elf_tdata (abfd)->stack_flags)
3575 /* We need a PT_GNU_STACK segment. */
3579 for (s = abfd->sections; s != NULL; s = s->next)
3581 if ((s->flags & SEC_LOAD) != 0
3582 && CONST_STRNEQ (s->name, ".note"))
3584 /* We need a PT_NOTE segment. */
3586 /* Try to create just one PT_NOTE segment
3587 for all adjacent loadable .note* sections.
3588 gABI requires that within a PT_NOTE segment
3589 (and also inside of each SHT_NOTE section)
3590 each note is padded to a multiple of 4 size,
3591 so we check whether the sections are correctly
3593 if (s->alignment_power == 2)
3594 while (s->next != NULL
3595 && s->next->alignment_power == 2
3596 && (s->next->flags & SEC_LOAD) != 0
3597 && CONST_STRNEQ (s->next->name, ".note"))
3602 for (s = abfd->sections; s != NULL; s = s->next)
3604 if (s->flags & SEC_THREAD_LOCAL)
3606 /* We need a PT_TLS segment. */
3612 /* Let the backend count up any program headers it might need. */
3613 bed = get_elf_backend_data (abfd);
3614 if (bed->elf_backend_additional_program_headers)
3618 a = (*bed->elf_backend_additional_program_headers) (abfd, info);
3624 return segs * bed->s->sizeof_phdr;
3627 /* Find the segment that contains the output_section of section. */
3630 _bfd_elf_find_segment_containing_section (bfd * abfd, asection * section)
3632 struct elf_segment_map *m;
3633 Elf_Internal_Phdr *p;
3635 for (m = elf_tdata (abfd)->segment_map,
3636 p = elf_tdata (abfd)->phdr;
3642 for (i = m->count - 1; i >= 0; i--)
3643 if (m->sections[i] == section)
3650 /* Create a mapping from a set of sections to a program segment. */
3652 static struct elf_segment_map *
3653 make_mapping (bfd *abfd,
3654 asection **sections,
3659 struct elf_segment_map *m;
3664 amt = sizeof (struct elf_segment_map);
3665 amt += (to - from - 1) * sizeof (asection *);
3666 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3670 m->p_type = PT_LOAD;
3671 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3672 m->sections[i - from] = *hdrpp;
3673 m->count = to - from;
3675 if (from == 0 && phdr)
3677 /* Include the headers in the first PT_LOAD segment. */
3678 m->includes_filehdr = 1;
3679 m->includes_phdrs = 1;
3685 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3688 struct elf_segment_map *
3689 _bfd_elf_make_dynamic_segment (bfd *abfd, asection *dynsec)
3691 struct elf_segment_map *m;
3693 m = (struct elf_segment_map *) bfd_zalloc (abfd,
3694 sizeof (struct elf_segment_map));
3698 m->p_type = PT_DYNAMIC;
3700 m->sections[0] = dynsec;
3705 /* Possibly add or remove segments from the segment map. */
3708 elf_modify_segment_map (bfd *abfd,
3709 struct bfd_link_info *info,
3710 bfd_boolean remove_empty_load)
3712 struct elf_segment_map **m;
3713 const struct elf_backend_data *bed;
3715 /* The placement algorithm assumes that non allocated sections are
3716 not in PT_LOAD segments. We ensure this here by removing such
3717 sections from the segment map. We also remove excluded
3718 sections. Finally, any PT_LOAD segment without sections is
3720 m = &elf_tdata (abfd)->segment_map;
3723 unsigned int i, new_count;
3725 for (new_count = 0, i = 0; i < (*m)->count; i++)
3727 if (((*m)->sections[i]->flags & SEC_EXCLUDE) == 0
3728 && (((*m)->sections[i]->flags & SEC_ALLOC) != 0
3729 || (*m)->p_type != PT_LOAD))
3731 (*m)->sections[new_count] = (*m)->sections[i];
3735 (*m)->count = new_count;
3737 if (remove_empty_load && (*m)->p_type == PT_LOAD && (*m)->count == 0)
3743 bed = get_elf_backend_data (abfd);
3744 if (bed->elf_backend_modify_segment_map != NULL)
3746 if (!(*bed->elf_backend_modify_segment_map) (abfd, info))
3753 /* Set up a mapping from BFD sections to program segments. */
3756 _bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
3759 struct elf_segment_map *m;
3760 asection **sections = NULL;
3761 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3762 bfd_boolean no_user_phdrs;
3764 no_user_phdrs = elf_tdata (abfd)->segment_map == NULL;
3767 info->user_phdrs = !no_user_phdrs;
3769 if (no_user_phdrs && bfd_count_sections (abfd) != 0)
3773 struct elf_segment_map *mfirst;
3774 struct elf_segment_map **pm;
3777 unsigned int phdr_index;
3778 bfd_vma maxpagesize;
3780 bfd_boolean phdr_in_segment = TRUE;
3781 bfd_boolean writable;
3783 asection *first_tls = NULL;
3784 asection *dynsec, *eh_frame_hdr;
3786 bfd_vma addr_mask, wrap_to = 0;
3788 /* Select the allocated sections, and sort them. */
3790 sections = (asection **) bfd_malloc2 (bfd_count_sections (abfd),
3791 sizeof (asection *));
3792 if (sections == NULL)
3795 /* Calculate top address, avoiding undefined behaviour of shift
3796 left operator when shift count is equal to size of type
3798 addr_mask = ((bfd_vma) 1 << (bfd_arch_bits_per_address (abfd) - 1)) - 1;
3799 addr_mask = (addr_mask << 1) + 1;
3802 for (s = abfd->sections; s != NULL; s = s->next)
3804 if ((s->flags & SEC_ALLOC) != 0)
3808 /* A wrapping section potentially clashes with header. */
3809 if (((s->lma + s->size) & addr_mask) < (s->lma & addr_mask))
3810 wrap_to = (s->lma + s->size) & addr_mask;
3813 BFD_ASSERT (i <= bfd_count_sections (abfd));
3816 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3818 /* Build the mapping. */
3823 /* If we have a .interp section, then create a PT_PHDR segment for
3824 the program headers and a PT_INTERP segment for the .interp
3826 s = bfd_get_section_by_name (abfd, ".interp");
3827 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3829 amt = sizeof (struct elf_segment_map);
3830 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3834 m->p_type = PT_PHDR;
3835 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3836 m->p_flags = PF_R | PF_X;
3837 m->p_flags_valid = 1;
3838 m->includes_phdrs = 1;
3843 amt = sizeof (struct elf_segment_map);
3844 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3848 m->p_type = PT_INTERP;
3856 /* Look through the sections. We put sections in the same program
3857 segment when the start of the second section can be placed within
3858 a few bytes of the end of the first section. */
3862 maxpagesize = bed->maxpagesize;
3864 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3866 && (dynsec->flags & SEC_LOAD) == 0)
3869 /* Deal with -Ttext or something similar such that the first section
3870 is not adjacent to the program headers. This is an
3871 approximation, since at this point we don't know exactly how many
3872 program headers we will need. */
3875 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
3877 if (phdr_size == (bfd_size_type) -1)
3878 phdr_size = get_program_header_size (abfd, info);
3879 if ((abfd->flags & D_PAGED) == 0
3880 || (sections[0]->lma & addr_mask) < phdr_size
3881 || ((sections[0]->lma & addr_mask) % maxpagesize
3882 < phdr_size % maxpagesize)
3883 || (sections[0]->lma & addr_mask & -maxpagesize) < wrap_to)
3884 phdr_in_segment = FALSE;
3887 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3890 bfd_boolean new_segment;
3894 /* See if this section and the last one will fit in the same
3897 if (last_hdr == NULL)
3899 /* If we don't have a segment yet, then we don't need a new
3900 one (we build the last one after this loop). */
3901 new_segment = FALSE;
3903 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3905 /* If this section has a different relation between the
3906 virtual address and the load address, then we need a new
3910 else if (hdr->lma < last_hdr->lma + last_size
3911 || last_hdr->lma + last_size < last_hdr->lma)
3913 /* If this section has a load address that makes it overlap
3914 the previous section, then we need a new segment. */
3917 /* In the next test we have to be careful when last_hdr->lma is close
3918 to the end of the address space. If the aligned address wraps
3919 around to the start of the address space, then there are no more
3920 pages left in memory and it is OK to assume that the current
3921 section can be included in the current segment. */
3922 else if ((BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3924 && (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize) + maxpagesize
3927 /* If putting this section in this segment would force us to
3928 skip a page in the segment, then we need a new segment. */
3931 else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
3932 && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
3934 /* We don't want to put a loadable section after a
3935 nonloadable section in the same segment.
3936 Consider .tbss sections as loadable for this purpose. */
3939 else if ((abfd->flags & D_PAGED) == 0)
3941 /* If the file is not demand paged, which means that we
3942 don't require the sections to be correctly aligned in the
3943 file, then there is no other reason for a new segment. */
3944 new_segment = FALSE;
3947 && (hdr->flags & SEC_READONLY) == 0
3948 && (((last_hdr->lma + last_size - 1) & -maxpagesize)
3949 != (hdr->lma & -maxpagesize)))
3951 /* We don't want to put a writable section in a read only
3952 segment, unless they are on the same page in memory
3953 anyhow. We already know that the last section does not
3954 bring us past the current section on the page, so the
3955 only case in which the new section is not on the same
3956 page as the previous section is when the previous section
3957 ends precisely on a page boundary. */
3962 /* Otherwise, we can use the same segment. */
3963 new_segment = FALSE;
3966 /* Allow interested parties a chance to override our decision. */
3967 if (last_hdr != NULL
3969 && info->callbacks->override_segment_assignment != NULL)
3971 = info->callbacks->override_segment_assignment (info, abfd, hdr,
3977 if ((hdr->flags & SEC_READONLY) == 0)
3980 /* .tbss sections effectively have zero size. */
3981 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
3982 != SEC_THREAD_LOCAL)
3983 last_size = hdr->size;
3989 /* We need a new program segment. We must create a new program
3990 header holding all the sections from phdr_index until hdr. */
3992 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3999 if ((hdr->flags & SEC_READONLY) == 0)
4005 /* .tbss sections effectively have zero size. */
4006 if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
4007 last_size = hdr->size;
4011 phdr_in_segment = FALSE;
4014 /* Create a final PT_LOAD program segment, but not if it's just
4016 if (last_hdr != NULL
4017 && (i - phdr_index != 1
4018 || ((last_hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD))
4019 != SEC_THREAD_LOCAL)))
4021 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
4029 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
4032 m = _bfd_elf_make_dynamic_segment (abfd, dynsec);
4039 /* For each batch of consecutive loadable .note sections,
4040 add a PT_NOTE segment. We don't use bfd_get_section_by_name,
4041 because if we link together nonloadable .note sections and
4042 loadable .note sections, we will generate two .note sections
4043 in the output file. FIXME: Using names for section types is
4045 for (s = abfd->sections; s != NULL; s = s->next)
4047 if ((s->flags & SEC_LOAD) != 0
4048 && CONST_STRNEQ (s->name, ".note"))
4053 amt = sizeof (struct elf_segment_map);
4054 if (s->alignment_power == 2)
4055 for (s2 = s; s2->next != NULL; s2 = s2->next)
4057 if (s2->next->alignment_power == 2
4058 && (s2->next->flags & SEC_LOAD) != 0
4059 && CONST_STRNEQ (s2->next->name, ".note")
4060 && align_power (s2->lma + s2->size, 2)
4066 amt += (count - 1) * sizeof (asection *);
4067 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4071 m->p_type = PT_NOTE;
4075 m->sections[m->count - count--] = s;
4076 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4079 m->sections[m->count - 1] = s;
4080 BFD_ASSERT ((s->flags & SEC_THREAD_LOCAL) == 0);
4084 if (s->flags & SEC_THREAD_LOCAL)
4092 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
4095 amt = sizeof (struct elf_segment_map);
4096 amt += (tls_count - 1) * sizeof (asection *);
4097 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4102 m->count = tls_count;
4103 /* Mandated PF_R. */
4105 m->p_flags_valid = 1;
4106 for (i = 0; i < (unsigned int) tls_count; ++i)
4108 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
4109 m->sections[i] = first_tls;
4110 first_tls = first_tls->next;
4117 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
4119 eh_frame_hdr = elf_tdata (abfd)->eh_frame_hdr;
4120 if (eh_frame_hdr != NULL
4121 && (eh_frame_hdr->output_section->flags & SEC_LOAD) != 0)
4123 amt = sizeof (struct elf_segment_map);
4124 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4128 m->p_type = PT_GNU_EH_FRAME;
4130 m->sections[0] = eh_frame_hdr->output_section;
4136 if (elf_tdata (abfd)->stack_flags)
4138 amt = sizeof (struct elf_segment_map);
4139 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4143 m->p_type = PT_GNU_STACK;
4144 m->p_flags = elf_tdata (abfd)->stack_flags;
4145 m->p_flags_valid = 1;
4151 if (info != NULL && info->relro)
4153 for (m = mfirst; m != NULL; m = m->next)
4155 if (m->p_type == PT_LOAD)
4157 asection *last = m->sections[m->count - 1];
4158 bfd_vma vaddr = m->sections[0]->vma;
4159 bfd_vma filesz = last->vma - vaddr + last->size;
4161 if (vaddr < info->relro_end
4162 && vaddr >= info->relro_start
4163 && (vaddr + filesz) >= info->relro_end)
4168 /* Make a PT_GNU_RELRO segment only when it isn't empty. */
4171 amt = sizeof (struct elf_segment_map);
4172 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
4176 m->p_type = PT_GNU_RELRO;
4178 m->p_flags_valid = 1;
4186 elf_tdata (abfd)->segment_map = mfirst;
4189 if (!elf_modify_segment_map (abfd, info, no_user_phdrs))
4192 for (count = 0, m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4194 elf_tdata (abfd)->program_header_size = count * bed->s->sizeof_phdr;
4199 if (sections != NULL)
4204 /* Sort sections by address. */
4207 elf_sort_sections (const void *arg1, const void *arg2)
4209 const asection *sec1 = *(const asection **) arg1;
4210 const asection *sec2 = *(const asection **) arg2;
4211 bfd_size_type size1, size2;
4213 /* Sort by LMA first, since this is the address used to
4214 place the section into a segment. */
4215 if (sec1->lma < sec2->lma)
4217 else if (sec1->lma > sec2->lma)
4220 /* Then sort by VMA. Normally the LMA and the VMA will be
4221 the same, and this will do nothing. */
4222 if (sec1->vma < sec2->vma)
4224 else if (sec1->vma > sec2->vma)
4227 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
4229 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
4235 /* If the indicies are the same, do not return 0
4236 here, but continue to try the next comparison. */
4237 if (sec1->target_index - sec2->target_index != 0)
4238 return sec1->target_index - sec2->target_index;
4243 else if (TOEND (sec2))
4248 /* Sort by size, to put zero sized sections
4249 before others at the same address. */
4251 size1 = (sec1->flags & SEC_LOAD) ? sec1->size : 0;
4252 size2 = (sec2->flags & SEC_LOAD) ? sec2->size : 0;
4259 return sec1->target_index - sec2->target_index;
4262 /* Ian Lance Taylor writes:
4264 We shouldn't be using % with a negative signed number. That's just
4265 not good. We have to make sure either that the number is not
4266 negative, or that the number has an unsigned type. When the types
4267 are all the same size they wind up as unsigned. When file_ptr is a
4268 larger signed type, the arithmetic winds up as signed long long,
4271 What we're trying to say here is something like ``increase OFF by
4272 the least amount that will cause it to be equal to the VMA modulo
4274 /* In other words, something like:
4276 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4277 off_offset = off % bed->maxpagesize;
4278 if (vma_offset < off_offset)
4279 adjustment = vma_offset + bed->maxpagesize - off_offset;
4281 adjustment = vma_offset - off_offset;
4283 which can can be collapsed into the expression below. */
4286 vma_page_aligned_bias (bfd_vma vma, ufile_ptr off, bfd_vma maxpagesize)
4288 return ((vma - off) % maxpagesize);
4292 print_segment_map (const struct elf_segment_map *m)
4295 const char *pt = get_segment_type (m->p_type);
4300 if (m->p_type >= PT_LOPROC && m->p_type <= PT_HIPROC)
4301 sprintf (buf, "LOPROC+%7.7x",
4302 (unsigned int) (m->p_type - PT_LOPROC));
4303 else if (m->p_type >= PT_LOOS && m->p_type <= PT_HIOS)
4304 sprintf (buf, "LOOS+%7.7x",
4305 (unsigned int) (m->p_type - PT_LOOS));
4307 snprintf (buf, sizeof (buf), "%8.8x",
4308 (unsigned int) m->p_type);
4312 fprintf (stderr, "%s:", pt);
4313 for (j = 0; j < m->count; j++)
4314 fprintf (stderr, " %s", m->sections [j]->name);
4320 write_zeros (bfd *abfd, file_ptr pos, bfd_size_type len)
4325 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
4327 buf = bfd_zmalloc (len);
4330 ret = bfd_bwrite (buf, len, abfd) == len;
4335 /* Assign file positions to the sections based on the mapping from
4336 sections to segments. This function also sets up some fields in
4340 assign_file_positions_for_load_sections (bfd *abfd,
4341 struct bfd_link_info *link_info)
4343 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4344 struct elf_segment_map *m;
4345 Elf_Internal_Phdr *phdrs;
4346 Elf_Internal_Phdr *p;
4348 bfd_size_type maxpagesize;
4351 bfd_vma header_pad = 0;
4353 if (link_info == NULL
4354 && !_bfd_elf_map_sections_to_segments (abfd, link_info))
4358 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
4362 header_pad = m->header_size;
4367 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
4368 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
4372 /* PR binutils/12467. */
4373 elf_elfheader (abfd)->e_phoff = 0;
4374 elf_elfheader (abfd)->e_phentsize = 0;
4377 elf_elfheader (abfd)->e_phnum = alloc;
4379 if (elf_tdata (abfd)->program_header_size == (bfd_size_type) -1)
4380 elf_tdata (abfd)->program_header_size = alloc * bed->s->sizeof_phdr;
4382 BFD_ASSERT (elf_tdata (abfd)->program_header_size
4383 >= alloc * bed->s->sizeof_phdr);
4387 elf_tdata (abfd)->next_file_pos = bed->s->sizeof_ehdr;
4391 /* We're writing the size in elf_tdata (abfd)->program_header_size,
4392 see assign_file_positions_except_relocs, so make sure we have
4393 that amount allocated, with trailing space cleared.
4394 The variable alloc contains the computed need, while elf_tdata
4395 (abfd)->program_header_size contains the size used for the
4397 See ld/emultempl/elf-generic.em:gld${EMULATION_NAME}_map_segments
4398 where the layout is forced to according to a larger size in the
4399 last iterations for the testcase ld-elf/header. */
4400 BFD_ASSERT (elf_tdata (abfd)->program_header_size % bed->s->sizeof_phdr
4402 phdrs = (Elf_Internal_Phdr *)
4404 (elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr),
4405 sizeof (Elf_Internal_Phdr));
4406 elf_tdata (abfd)->phdr = phdrs;
4411 if ((abfd->flags & D_PAGED) != 0)
4412 maxpagesize = bed->maxpagesize;
4414 off = bed->s->sizeof_ehdr;
4415 off += alloc * bed->s->sizeof_phdr;
4416 if (header_pad < (bfd_vma) off)
4422 for (m = elf_tdata (abfd)->segment_map, p = phdrs, j = 0;
4424 m = m->next, p++, j++)
4428 bfd_boolean no_contents;
4430 /* If elf_segment_map is not from map_sections_to_segments, the
4431 sections may not be correctly ordered. NOTE: sorting should
4432 not be done to the PT_NOTE section of a corefile, which may
4433 contain several pseudo-sections artificially created by bfd.
4434 Sorting these pseudo-sections breaks things badly. */
4436 && !(elf_elfheader (abfd)->e_type == ET_CORE
4437 && m->p_type == PT_NOTE))
4438 qsort (m->sections, (size_t) m->count, sizeof (asection *),
4441 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4442 number of sections with contents contributing to both p_filesz
4443 and p_memsz, followed by a number of sections with no contents
4444 that just contribute to p_memsz. In this loop, OFF tracks next
4445 available file offset for PT_LOAD and PT_NOTE segments. */
4446 p->p_type = m->p_type;
4447 p->p_flags = m->p_flags;
4452 p->p_vaddr = m->sections[0]->vma - m->p_vaddr_offset;
4454 if (m->p_paddr_valid)
4455 p->p_paddr = m->p_paddr;
4456 else if (m->count == 0)
4459 p->p_paddr = m->sections[0]->lma - m->p_vaddr_offset;
4461 if (p->p_type == PT_LOAD
4462 && (abfd->flags & D_PAGED) != 0)
4464 /* p_align in demand paged PT_LOAD segments effectively stores
4465 the maximum page size. When copying an executable with
4466 objcopy, we set m->p_align from the input file. Use this
4467 value for maxpagesize rather than bed->maxpagesize, which
4468 may be different. Note that we use maxpagesize for PT_TLS
4469 segment alignment later in this function, so we are relying
4470 on at least one PT_LOAD segment appearing before a PT_TLS
4472 if (m->p_align_valid)
4473 maxpagesize = m->p_align;
4475 p->p_align = maxpagesize;
4477 else if (m->p_align_valid)
4478 p->p_align = m->p_align;
4479 else if (m->count == 0)
4480 p->p_align = 1 << bed->s->log_file_align;
4484 no_contents = FALSE;
4486 if (p->p_type == PT_LOAD
4489 bfd_size_type align;
4490 unsigned int align_power = 0;
4492 if (m->p_align_valid)
4496 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4498 unsigned int secalign;
4500 secalign = bfd_get_section_alignment (abfd, *secpp);
4501 if (secalign > align_power)
4502 align_power = secalign;
4504 align = (bfd_size_type) 1 << align_power;
4505 if (align < maxpagesize)
4506 align = maxpagesize;
4509 for (i = 0; i < m->count; i++)
4510 if ((m->sections[i]->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
4511 /* If we aren't making room for this section, then
4512 it must be SHT_NOBITS regardless of what we've
4513 set via struct bfd_elf_special_section. */
4514 elf_section_type (m->sections[i]) = SHT_NOBITS;
4516 /* Find out whether this segment contains any loadable
4519 for (i = 0; i < m->count; i++)
4520 if (elf_section_type (m->sections[i]) != SHT_NOBITS)
4522 no_contents = FALSE;
4526 off_adjust = vma_page_aligned_bias (p->p_vaddr, off, align);
4530 /* We shouldn't need to align the segment on disk since
4531 the segment doesn't need file space, but the gABI
4532 arguably requires the alignment and glibc ld.so
4533 checks it. So to comply with the alignment
4534 requirement but not waste file space, we adjust
4535 p_offset for just this segment. (OFF_ADJUST is
4536 subtracted from OFF later.) This may put p_offset
4537 past the end of file, but that shouldn't matter. */
4542 /* Make sure the .dynamic section is the first section in the
4543 PT_DYNAMIC segment. */
4544 else if (p->p_type == PT_DYNAMIC
4546 && strcmp (m->sections[0]->name, ".dynamic") != 0)
4549 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4551 bfd_set_error (bfd_error_bad_value);
4554 /* Set the note section type to SHT_NOTE. */
4555 else if (p->p_type == PT_NOTE)
4556 for (i = 0; i < m->count; i++)
4557 elf_section_type (m->sections[i]) = SHT_NOTE;
4563 if (m->includes_filehdr)
4565 if (!m->p_flags_valid)
4567 p->p_filesz = bed->s->sizeof_ehdr;
4568 p->p_memsz = bed->s->sizeof_ehdr;
4571 BFD_ASSERT (p->p_type == PT_LOAD);
4573 if (p->p_vaddr < (bfd_vma) off)
4575 (*_bfd_error_handler)
4576 (_("%B: Not enough room for program headers, try linking with -N"),
4578 bfd_set_error (bfd_error_bad_value);
4583 if (!m->p_paddr_valid)
4588 if (m->includes_phdrs)
4590 if (!m->p_flags_valid)
4593 if (!m->includes_filehdr)
4595 p->p_offset = bed->s->sizeof_ehdr;
4599 BFD_ASSERT (p->p_type == PT_LOAD);
4600 p->p_vaddr -= off - p->p_offset;
4601 if (!m->p_paddr_valid)
4602 p->p_paddr -= off - p->p_offset;
4606 p->p_filesz += alloc * bed->s->sizeof_phdr;
4607 p->p_memsz += alloc * bed->s->sizeof_phdr;
4610 p->p_filesz += header_pad;
4611 p->p_memsz += header_pad;
4615 if (p->p_type == PT_LOAD
4616 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
4618 if (!m->includes_filehdr && !m->includes_phdrs)
4624 adjust = off - (p->p_offset + p->p_filesz);
4626 p->p_filesz += adjust;
4627 p->p_memsz += adjust;
4631 /* Set up p_filesz, p_memsz, p_align and p_flags from the section
4632 maps. Set filepos for sections in PT_LOAD segments, and in
4633 core files, for sections in PT_NOTE segments.
4634 assign_file_positions_for_non_load_sections will set filepos
4635 for other sections and update p_filesz for other segments. */
4636 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
4639 bfd_size_type align;
4640 Elf_Internal_Shdr *this_hdr;
4643 this_hdr = &elf_section_data (sec)->this_hdr;
4644 align = (bfd_size_type) 1 << bfd_get_section_alignment (abfd, sec);
4646 if ((p->p_type == PT_LOAD
4647 || p->p_type == PT_TLS)
4648 && (this_hdr->sh_type != SHT_NOBITS
4649 || ((this_hdr->sh_flags & SHF_ALLOC) != 0
4650 && ((this_hdr->sh_flags & SHF_TLS) == 0
4651 || p->p_type == PT_TLS))))
4653 bfd_vma p_start = p->p_paddr;
4654 bfd_vma p_end = p_start + p->p_memsz;
4655 bfd_vma s_start = sec->lma;
4656 bfd_vma adjust = s_start - p_end;
4660 || p_end < p_start))
4662 (*_bfd_error_handler)
4663 (_("%B: section %A lma %#lx adjusted to %#lx"), abfd, sec,
4664 (unsigned long) s_start, (unsigned long) p_end);
4668 p->p_memsz += adjust;
4670 if (this_hdr->sh_type != SHT_NOBITS)
4672 if (p->p_filesz + adjust < p->p_memsz)
4674 /* We have a PROGBITS section following NOBITS ones.
4675 Allocate file space for the NOBITS section(s) and
4677 adjust = p->p_memsz - p->p_filesz;
4678 if (!write_zeros (abfd, off, adjust))
4682 p->p_filesz += adjust;
4686 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
4688 /* The section at i == 0 is the one that actually contains
4692 this_hdr->sh_offset = sec->filepos = off;
4693 off += this_hdr->sh_size;
4694 p->p_filesz = this_hdr->sh_size;
4700 /* The rest are fake sections that shouldn't be written. */
4709 if (p->p_type == PT_LOAD)
4711 this_hdr->sh_offset = sec->filepos = off;
4712 if (this_hdr->sh_type != SHT_NOBITS)
4713 off += this_hdr->sh_size;
4715 else if (this_hdr->sh_type == SHT_NOBITS
4716 && (this_hdr->sh_flags & SHF_TLS) != 0
4717 && this_hdr->sh_offset == 0)
4719 /* This is a .tbss section that didn't get a PT_LOAD.
4720 (See _bfd_elf_map_sections_to_segments "Create a
4721 final PT_LOAD".) Set sh_offset to the value it
4722 would have if we had created a zero p_filesz and
4723 p_memsz PT_LOAD header for the section. This
4724 also makes the PT_TLS header have the same
4726 bfd_vma adjust = vma_page_aligned_bias (this_hdr->sh_addr,
4728 this_hdr->sh_offset = sec->filepos = off + adjust;
4731 if (this_hdr->sh_type != SHT_NOBITS)
4733 p->p_filesz += this_hdr->sh_size;
4734 /* A load section without SHF_ALLOC is something like
4735 a note section in a PT_NOTE segment. These take
4736 file space but are not loaded into memory. */
4737 if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4738 p->p_memsz += this_hdr->sh_size;
4740 else if ((this_hdr->sh_flags & SHF_ALLOC) != 0)
4742 if (p->p_type == PT_TLS)
4743 p->p_memsz += this_hdr->sh_size;
4745 /* .tbss is special. It doesn't contribute to p_memsz of
4747 else if ((this_hdr->sh_flags & SHF_TLS) == 0)
4748 p->p_memsz += this_hdr->sh_size;
4751 if (align > p->p_align
4752 && !m->p_align_valid
4753 && (p->p_type != PT_LOAD
4754 || (abfd->flags & D_PAGED) == 0))
4758 if (!m->p_flags_valid)
4761 if ((this_hdr->sh_flags & SHF_EXECINSTR) != 0)
4763 if ((this_hdr->sh_flags & SHF_WRITE) != 0)
4769 /* Check that all sections are in a PT_LOAD segment.
4770 Don't check funky gdb generated core files. */
4771 if (p->p_type == PT_LOAD && bfd_get_format (abfd) != bfd_core)
4773 bfd_boolean check_vma = TRUE;
4775 for (i = 1; i < m->count; i++)
4776 if (m->sections[i]->vma == m->sections[i - 1]->vma
4777 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i])
4778 ->this_hdr), p) != 0
4779 && ELF_SECTION_SIZE (&(elf_section_data (m->sections[i - 1])
4780 ->this_hdr), p) != 0)
4782 /* Looks like we have overlays packed into the segment. */
4787 for (i = 0; i < m->count; i++)
4789 Elf_Internal_Shdr *this_hdr;
4792 sec = m->sections[i];
4793 this_hdr = &(elf_section_data(sec)->this_hdr);
4794 if (!ELF_SECTION_IN_SEGMENT_1 (this_hdr, p, check_vma, 0)
4795 && !ELF_TBSS_SPECIAL (this_hdr, p))
4797 (*_bfd_error_handler)
4798 (_("%B: section `%A' can't be allocated in segment %d"),
4800 print_segment_map (m);
4806 elf_tdata (abfd)->next_file_pos = off;
4810 /* Assign file positions for the other sections. */
4813 assign_file_positions_for_non_load_sections (bfd *abfd,
4814 struct bfd_link_info *link_info)
4816 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4817 Elf_Internal_Shdr **i_shdrpp;
4818 Elf_Internal_Shdr **hdrpp;
4819 Elf_Internal_Phdr *phdrs;
4820 Elf_Internal_Phdr *p;
4821 struct elf_segment_map *m;
4822 bfd_vma filehdr_vaddr, filehdr_paddr;
4823 bfd_vma phdrs_vaddr, phdrs_paddr;
4825 unsigned int num_sec;
4829 i_shdrpp = elf_elfsections (abfd);
4830 num_sec = elf_numsections (abfd);
4831 off = elf_tdata (abfd)->next_file_pos;
4832 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4834 struct elf_obj_tdata *tdata = elf_tdata (abfd);
4835 Elf_Internal_Shdr *hdr;
4838 if (hdr->bfd_section != NULL
4839 && (hdr->bfd_section->filepos != 0
4840 || (hdr->sh_type == SHT_NOBITS
4841 && hdr->contents == NULL)))
4842 BFD_ASSERT (hdr->sh_offset == hdr->bfd_section->filepos);
4843 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4845 if (hdr->sh_size != 0)
4846 (*_bfd_error_handler)
4847 (_("%B: warning: allocated section `%s' not in segment"),
4849 (hdr->bfd_section == NULL
4851 : hdr->bfd_section->name));
4852 /* We don't need to page align empty sections. */
4853 if ((abfd->flags & D_PAGED) != 0 && hdr->sh_size != 0)
4854 off += vma_page_aligned_bias (hdr->sh_addr, off,
4857 off += vma_page_aligned_bias (hdr->sh_addr, off,
4859 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4862 else if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
4863 && hdr->bfd_section == NULL)
4864 || hdr == i_shdrpp[tdata->symtab_section]
4865 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4866 || hdr == i_shdrpp[tdata->strtab_section])
4867 hdr->sh_offset = -1;
4869 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
4872 /* Now that we have set the section file positions, we can set up
4873 the file positions for the non PT_LOAD segments. */
4877 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
4879 phdrs = elf_tdata (abfd)->phdr;
4880 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4885 if (p->p_type != PT_LOAD)
4888 if (m->includes_filehdr)
4890 filehdr_vaddr = p->p_vaddr;
4891 filehdr_paddr = p->p_paddr;
4893 if (m->includes_phdrs)
4895 phdrs_vaddr = p->p_vaddr;
4896 phdrs_paddr = p->p_paddr;
4897 if (m->includes_filehdr)
4899 phdrs_vaddr += bed->s->sizeof_ehdr;
4900 phdrs_paddr += bed->s->sizeof_ehdr;
4905 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
4909 if (p->p_type == PT_GNU_RELRO)
4911 const Elf_Internal_Phdr *lp;
4913 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4915 if (link_info != NULL)
4917 /* During linking the range of the RELRO segment is passed
4919 for (lp = phdrs; lp < phdrs + count; ++lp)
4921 if (lp->p_type == PT_LOAD
4922 && lp->p_vaddr >= link_info->relro_start
4923 && lp->p_vaddr < link_info->relro_end
4924 && lp->p_vaddr + lp->p_filesz >= link_info->relro_end)
4930 /* Otherwise we are copying an executable or shared
4931 library, but we need to use the same linker logic. */
4932 for (lp = phdrs; lp < phdrs + count; ++lp)
4934 if (lp->p_type == PT_LOAD
4935 && lp->p_paddr == p->p_paddr)
4940 if (lp < phdrs + count)
4942 p->p_vaddr = lp->p_vaddr;
4943 p->p_paddr = lp->p_paddr;
4944 p->p_offset = lp->p_offset;
4945 if (link_info != NULL)
4946 p->p_filesz = link_info->relro_end - lp->p_vaddr;
4947 else if (m->p_size_valid)
4948 p->p_filesz = m->p_size;
4951 p->p_memsz = p->p_filesz;
4952 /* Preserve the alignment and flags if they are valid. The gold
4953 linker generates RW/4 for the PT_GNU_RELRO section. It is better
4954 for objcopy/strip to honor these attributes otherwise gdb will
4955 choke when using separate debug files. */
4956 if (!m->p_align_valid)
4958 if (!m->p_flags_valid)
4959 p->p_flags = (lp->p_flags & ~PF_W);
4963 memset (p, 0, sizeof *p);
4964 p->p_type = PT_NULL;
4967 else if (m->count != 0)
4969 if (p->p_type != PT_LOAD
4970 && (p->p_type != PT_NOTE
4971 || bfd_get_format (abfd) != bfd_core))
4973 BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
4976 p->p_offset = m->sections[0]->filepos;
4977 for (i = m->count; i-- != 0;)
4979 asection *sect = m->sections[i];
4980 Elf_Internal_Shdr *hdr = &elf_section_data (sect)->this_hdr;
4981 if (hdr->sh_type != SHT_NOBITS)
4983 p->p_filesz = (sect->filepos - m->sections[0]->filepos
4990 else if (m->includes_filehdr)
4992 p->p_vaddr = filehdr_vaddr;
4993 if (! m->p_paddr_valid)
4994 p->p_paddr = filehdr_paddr;
4996 else if (m->includes_phdrs)
4998 p->p_vaddr = phdrs_vaddr;
4999 if (! m->p_paddr_valid)
5000 p->p_paddr = phdrs_paddr;
5004 elf_tdata (abfd)->next_file_pos = off;
5009 /* Work out the file positions of all the sections. This is called by
5010 _bfd_elf_compute_section_file_positions. All the section sizes and
5011 VMAs must be known before this is called.
5013 Reloc sections come in two flavours: Those processed specially as
5014 "side-channel" data attached to a section to which they apply, and
5015 those that bfd doesn't process as relocations. The latter sort are
5016 stored in a normal bfd section by bfd_section_from_shdr. We don't
5017 consider the former sort here, unless they form part of the loadable
5018 image. Reloc sections not assigned here will be handled later by
5019 assign_file_positions_for_relocs.
5021 We also don't set the positions of the .symtab and .strtab here. */
5024 assign_file_positions_except_relocs (bfd *abfd,
5025 struct bfd_link_info *link_info)
5027 struct elf_obj_tdata *tdata = elf_tdata (abfd);
5028 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5030 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5032 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
5033 && bfd_get_format (abfd) != bfd_core)
5035 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
5036 unsigned int num_sec = elf_numsections (abfd);
5037 Elf_Internal_Shdr **hdrpp;
5040 /* Start after the ELF header. */
5041 off = i_ehdrp->e_ehsize;
5043 /* We are not creating an executable, which means that we are
5044 not creating a program header, and that the actual order of
5045 the sections in the file is unimportant. */
5046 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
5048 Elf_Internal_Shdr *hdr;
5051 if (((hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
5052 && hdr->bfd_section == NULL)
5053 || i == tdata->symtab_section
5054 || i == tdata->symtab_shndx_section
5055 || i == tdata->strtab_section)
5057 hdr->sh_offset = -1;
5060 off = _bfd_elf_assign_file_position_for_section (hdr, off, TRUE);
5067 /* Assign file positions for the loaded sections based on the
5068 assignment of sections to segments. */
5069 if (!assign_file_positions_for_load_sections (abfd, link_info))
5072 /* And for non-load sections. */
5073 if (!assign_file_positions_for_non_load_sections (abfd, link_info))
5076 if (bed->elf_backend_modify_program_headers != NULL)
5078 if (!(*bed->elf_backend_modify_program_headers) (abfd, link_info))
5082 /* Write out the program headers. */
5083 alloc = tdata->program_header_size / bed->s->sizeof_phdr;
5084 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
5085 || bed->s->write_out_phdrs (abfd, tdata->phdr, alloc) != 0)
5088 off = tdata->next_file_pos;
5091 /* Place the section headers. */
5092 off = align_file_position (off, 1 << bed->s->log_file_align);
5093 i_ehdrp->e_shoff = off;
5094 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
5096 tdata->next_file_pos = off;
5102 prep_headers (bfd *abfd)
5104 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form. */
5105 struct elf_strtab_hash *shstrtab;
5106 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5108 i_ehdrp = elf_elfheader (abfd);
5110 shstrtab = _bfd_elf_strtab_init ();
5111 if (shstrtab == NULL)
5114 elf_shstrtab (abfd) = shstrtab;
5116 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
5117 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
5118 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
5119 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
5121 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
5122 i_ehdrp->e_ident[EI_DATA] =
5123 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
5124 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
5126 if ((abfd->flags & DYNAMIC) != 0)
5127 i_ehdrp->e_type = ET_DYN;
5128 else if ((abfd->flags & EXEC_P) != 0)
5129 i_ehdrp->e_type = ET_EXEC;
5130 else if (bfd_get_format (abfd) == bfd_core)
5131 i_ehdrp->e_type = ET_CORE;
5133 i_ehdrp->e_type = ET_REL;
5135 switch (bfd_get_arch (abfd))
5137 case bfd_arch_unknown:
5138 i_ehdrp->e_machine = EM_NONE;
5141 /* There used to be a long list of cases here, each one setting
5142 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
5143 in the corresponding bfd definition. To avoid duplication,
5144 the switch was removed. Machines that need special handling
5145 can generally do it in elf_backend_final_write_processing(),
5146 unless they need the information earlier than the final write.
5147 Such need can generally be supplied by replacing the tests for
5148 e_machine with the conditions used to determine it. */
5150 i_ehdrp->e_machine = bed->elf_machine_code;
5153 i_ehdrp->e_version = bed->s->ev_current;
5154 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
5156 /* No program header, for now. */
5157 i_ehdrp->e_phoff = 0;
5158 i_ehdrp->e_phentsize = 0;
5159 i_ehdrp->e_phnum = 0;
5161 /* Each bfd section is section header entry. */
5162 i_ehdrp->e_entry = bfd_get_start_address (abfd);
5163 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
5165 /* If we're building an executable, we'll need a program header table. */
5166 if (abfd->flags & EXEC_P)
5167 /* It all happens later. */
5171 i_ehdrp->e_phentsize = 0;
5172 i_ehdrp->e_phoff = 0;
5175 elf_tdata (abfd)->symtab_hdr.sh_name =
5176 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", FALSE);
5177 elf_tdata (abfd)->strtab_hdr.sh_name =
5178 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", FALSE);
5179 elf_tdata (abfd)->shstrtab_hdr.sh_name =
5180 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", FALSE);
5181 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5182 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
5183 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
5189 /* Assign file positions for all the reloc sections which are not part
5190 of the loadable file image. */
5193 _bfd_elf_assign_file_positions_for_relocs (bfd *abfd)
5196 unsigned int i, num_sec;
5197 Elf_Internal_Shdr **shdrpp;
5199 off = elf_tdata (abfd)->next_file_pos;
5201 num_sec = elf_numsections (abfd);
5202 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
5204 Elf_Internal_Shdr *shdrp;
5207 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
5208 && shdrp->sh_offset == -1)
5209 off = _bfd_elf_assign_file_position_for_section (shdrp, off, TRUE);
5212 elf_tdata (abfd)->next_file_pos = off;
5216 _bfd_elf_write_object_contents (bfd *abfd)
5218 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5219 Elf_Internal_Shdr **i_shdrp;
5221 unsigned int count, num_sec;
5223 if (! abfd->output_has_begun
5224 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
5227 i_shdrp = elf_elfsections (abfd);
5230 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
5234 _bfd_elf_assign_file_positions_for_relocs (abfd);
5236 /* After writing the headers, we need to write the sections too... */
5237 num_sec = elf_numsections (abfd);
5238 for (count = 1; count < num_sec; count++)
5240 if (bed->elf_backend_section_processing)
5241 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
5242 if (i_shdrp[count]->contents)
5244 bfd_size_type amt = i_shdrp[count]->sh_size;
5246 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
5247 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
5252 /* Write out the section header names. */
5253 if (elf_shstrtab (abfd) != NULL
5254 && (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
5255 || !_bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd))))
5258 if (bed->elf_backend_final_write_processing)
5259 (*bed->elf_backend_final_write_processing) (abfd,
5260 elf_tdata (abfd)->linker);
5262 if (!bed->s->write_shdrs_and_ehdr (abfd))
5265 /* This is last since write_shdrs_and_ehdr can touch i_shdrp[0]. */
5266 if (elf_tdata (abfd)->after_write_object_contents)
5267 return (*elf_tdata (abfd)->after_write_object_contents) (abfd);
5273 _bfd_elf_write_corefile_contents (bfd *abfd)
5275 /* Hopefully this can be done just like an object file. */
5276 return _bfd_elf_write_object_contents (abfd);
5279 /* Given a section, search the header to find them. */
5282 _bfd_elf_section_from_bfd_section (bfd *abfd, struct bfd_section *asect)
5284 const struct elf_backend_data *bed;
5285 unsigned int sec_index;
5287 if (elf_section_data (asect) != NULL
5288 && elf_section_data (asect)->this_idx != 0)
5289 return elf_section_data (asect)->this_idx;
5291 if (bfd_is_abs_section (asect))
5292 sec_index = SHN_ABS;
5293 else if (bfd_is_com_section (asect))
5294 sec_index = SHN_COMMON;
5295 else if (bfd_is_und_section (asect))
5296 sec_index = SHN_UNDEF;
5298 sec_index = SHN_BAD;
5300 bed = get_elf_backend_data (abfd);
5301 if (bed->elf_backend_section_from_bfd_section)
5303 int retval = sec_index;
5305 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
5309 if (sec_index == SHN_BAD)
5310 bfd_set_error (bfd_error_nonrepresentable_section);
5315 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5319 _bfd_elf_symbol_from_bfd_symbol (bfd *abfd, asymbol **asym_ptr_ptr)
5321 asymbol *asym_ptr = *asym_ptr_ptr;
5323 flagword flags = asym_ptr->flags;
5325 /* When gas creates relocations against local labels, it creates its
5326 own symbol for the section, but does put the symbol into the
5327 symbol chain, so udata is 0. When the linker is generating
5328 relocatable output, this section symbol may be for one of the
5329 input sections rather than the output section. */
5330 if (asym_ptr->udata.i == 0
5331 && (flags & BSF_SECTION_SYM)
5332 && asym_ptr->section)
5337 sec = asym_ptr->section;
5338 if (sec->owner != abfd && sec->output_section != NULL)
5339 sec = sec->output_section;
5340 if (sec->owner == abfd
5341 && (indx = sec->index) < elf_num_section_syms (abfd)
5342 && elf_section_syms (abfd)[indx] != NULL)
5343 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
5346 idx = asym_ptr->udata.i;
5350 /* This case can occur when using --strip-symbol on a symbol
5351 which is used in a relocation entry. */
5352 (*_bfd_error_handler)
5353 (_("%B: symbol `%s' required but not present"),
5354 abfd, bfd_asymbol_name (asym_ptr));
5355 bfd_set_error (bfd_error_no_symbols);
5362 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx\n",
5363 (long) asym_ptr, asym_ptr->name, idx, (long) flags);
5371 /* Rewrite program header information. */
5374 rewrite_elf_program_header (bfd *ibfd, bfd *obfd)
5376 Elf_Internal_Ehdr *iehdr;
5377 struct elf_segment_map *map;
5378 struct elf_segment_map *map_first;
5379 struct elf_segment_map **pointer_to_map;
5380 Elf_Internal_Phdr *segment;
5383 unsigned int num_segments;
5384 bfd_boolean phdr_included = FALSE;
5385 bfd_boolean p_paddr_valid;
5386 bfd_vma maxpagesize;
5387 struct elf_segment_map *phdr_adjust_seg = NULL;
5388 unsigned int phdr_adjust_num = 0;
5389 const struct elf_backend_data *bed;
5391 bed = get_elf_backend_data (ibfd);
5392 iehdr = elf_elfheader (ibfd);
5395 pointer_to_map = &map_first;
5397 num_segments = elf_elfheader (ibfd)->e_phnum;
5398 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
5400 /* Returns the end address of the segment + 1. */
5401 #define SEGMENT_END(segment, start) \
5402 (start + (segment->p_memsz > segment->p_filesz \
5403 ? segment->p_memsz : segment->p_filesz))
5405 #define SECTION_SIZE(section, segment) \
5406 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5407 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5408 ? section->size : 0)
5410 /* Returns TRUE if the given section is contained within
5411 the given segment. VMA addresses are compared. */
5412 #define IS_CONTAINED_BY_VMA(section, segment) \
5413 (section->vma >= segment->p_vaddr \
5414 && (section->vma + SECTION_SIZE (section, segment) \
5415 <= (SEGMENT_END (segment, segment->p_vaddr))))
5417 /* Returns TRUE if the given section is contained within
5418 the given segment. LMA addresses are compared. */
5419 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5420 (section->lma >= base \
5421 && (section->lma + SECTION_SIZE (section, segment) \
5422 <= SEGMENT_END (segment, base)))
5424 /* Handle PT_NOTE segment. */
5425 #define IS_NOTE(p, s) \
5426 (p->p_type == PT_NOTE \
5427 && elf_section_type (s) == SHT_NOTE \
5428 && (bfd_vma) s->filepos >= p->p_offset \
5429 && ((bfd_vma) s->filepos + s->size \
5430 <= p->p_offset + p->p_filesz))
5432 /* Special case: corefile "NOTE" section containing regs, prpsinfo
5434 #define IS_COREFILE_NOTE(p, s) \
5436 && bfd_get_format (ibfd) == bfd_core \
5440 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5441 linker, which generates a PT_INTERP section with p_vaddr and
5442 p_memsz set to 0. */
5443 #define IS_SOLARIS_PT_INTERP(p, s) \
5445 && p->p_paddr == 0 \
5446 && p->p_memsz == 0 \
5447 && p->p_filesz > 0 \
5448 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5450 && (bfd_vma) s->filepos >= p->p_offset \
5451 && ((bfd_vma) s->filepos + s->size \
5452 <= p->p_offset + p->p_filesz))
5454 /* Decide if the given section should be included in the given segment.
5455 A section will be included if:
5456 1. It is within the address space of the segment -- we use the LMA
5457 if that is set for the segment and the VMA otherwise,
5458 2. It is an allocated section or a NOTE section in a PT_NOTE
5460 3. There is an output section associated with it,
5461 4. The section has not already been allocated to a previous segment.
5462 5. PT_GNU_STACK segments do not include any sections.
5463 6. PT_TLS segment includes only SHF_TLS sections.
5464 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5465 8. PT_DYNAMIC should not contain empty sections at the beginning
5466 (with the possible exception of .dynamic). */
5467 #define IS_SECTION_IN_INPUT_SEGMENT(section, segment, bed) \
5468 ((((segment->p_paddr \
5469 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5470 : IS_CONTAINED_BY_VMA (section, segment)) \
5471 && (section->flags & SEC_ALLOC) != 0) \
5472 || IS_NOTE (segment, section)) \
5473 && segment->p_type != PT_GNU_STACK \
5474 && (segment->p_type != PT_TLS \
5475 || (section->flags & SEC_THREAD_LOCAL)) \
5476 && (segment->p_type == PT_LOAD \
5477 || segment->p_type == PT_TLS \
5478 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5479 && (segment->p_type != PT_DYNAMIC \
5480 || SECTION_SIZE (section, segment) > 0 \
5481 || (segment->p_paddr \
5482 ? segment->p_paddr != section->lma \
5483 : segment->p_vaddr != section->vma) \
5484 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5486 && !section->segment_mark)
5488 /* If the output section of a section in the input segment is NULL,
5489 it is removed from the corresponding output segment. */
5490 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5491 (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed) \
5492 && section->output_section != NULL)
5494 /* Returns TRUE iff seg1 starts after the end of seg2. */
5495 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5496 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5498 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5499 their VMA address ranges and their LMA address ranges overlap.
5500 It is possible to have overlapping VMA ranges without overlapping LMA
5501 ranges. RedBoot images for example can have both .data and .bss mapped
5502 to the same VMA range, but with the .data section mapped to a different
5504 #define SEGMENT_OVERLAPS(seg1, seg2) \
5505 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5506 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5507 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5508 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5510 /* Initialise the segment mark field. */
5511 for (section = ibfd->sections; section != NULL; section = section->next)
5512 section->segment_mark = FALSE;
5514 /* The Solaris linker creates program headers in which all the
5515 p_paddr fields are zero. When we try to objcopy or strip such a
5516 file, we get confused. Check for this case, and if we find it
5517 don't set the p_paddr_valid fields. */
5518 p_paddr_valid = FALSE;
5519 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5522 if (segment->p_paddr != 0)
5524 p_paddr_valid = TRUE;
5528 /* Scan through the segments specified in the program header
5529 of the input BFD. For this first scan we look for overlaps
5530 in the loadable segments. These can be created by weird
5531 parameters to objcopy. Also, fix some solaris weirdness. */
5532 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5537 Elf_Internal_Phdr *segment2;
5539 if (segment->p_type == PT_INTERP)
5540 for (section = ibfd->sections; section; section = section->next)
5541 if (IS_SOLARIS_PT_INTERP (segment, section))
5543 /* Mininal change so that the normal section to segment
5544 assignment code will work. */
5545 segment->p_vaddr = section->vma;
5549 if (segment->p_type != PT_LOAD)
5551 /* Remove PT_GNU_RELRO segment. */
5552 if (segment->p_type == PT_GNU_RELRO)
5553 segment->p_type = PT_NULL;
5557 /* Determine if this segment overlaps any previous segments. */
5558 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2++)
5560 bfd_signed_vma extra_length;
5562 if (segment2->p_type != PT_LOAD
5563 || !SEGMENT_OVERLAPS (segment, segment2))
5566 /* Merge the two segments together. */
5567 if (segment2->p_vaddr < segment->p_vaddr)
5569 /* Extend SEGMENT2 to include SEGMENT and then delete
5571 extra_length = (SEGMENT_END (segment, segment->p_vaddr)
5572 - SEGMENT_END (segment2, segment2->p_vaddr));
5574 if (extra_length > 0)
5576 segment2->p_memsz += extra_length;
5577 segment2->p_filesz += extra_length;
5580 segment->p_type = PT_NULL;
5582 /* Since we have deleted P we must restart the outer loop. */
5584 segment = elf_tdata (ibfd)->phdr;
5589 /* Extend SEGMENT to include SEGMENT2 and then delete
5591 extra_length = (SEGMENT_END (segment2, segment2->p_vaddr)
5592 - SEGMENT_END (segment, segment->p_vaddr));
5594 if (extra_length > 0)
5596 segment->p_memsz += extra_length;
5597 segment->p_filesz += extra_length;
5600 segment2->p_type = PT_NULL;
5605 /* The second scan attempts to assign sections to segments. */
5606 for (i = 0, segment = elf_tdata (ibfd)->phdr;
5610 unsigned int section_count;
5611 asection **sections;
5612 asection *output_section;
5614 bfd_vma matching_lma;
5615 bfd_vma suggested_lma;
5618 asection *first_section;
5619 bfd_boolean first_matching_lma;
5620 bfd_boolean first_suggested_lma;
5622 if (segment->p_type == PT_NULL)
5625 first_section = NULL;
5626 /* Compute how many sections might be placed into this segment. */
5627 for (section = ibfd->sections, section_count = 0;
5629 section = section->next)
5631 /* Find the first section in the input segment, which may be
5632 removed from the corresponding output segment. */
5633 if (IS_SECTION_IN_INPUT_SEGMENT (section, segment, bed))
5635 if (first_section == NULL)
5636 first_section = section;
5637 if (section->output_section != NULL)
5642 /* Allocate a segment map big enough to contain
5643 all of the sections we have selected. */
5644 amt = sizeof (struct elf_segment_map);
5645 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5646 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
5650 /* Initialise the fields of the segment map. Default to
5651 using the physical address of the segment in the input BFD. */
5653 map->p_type = segment->p_type;
5654 map->p_flags = segment->p_flags;
5655 map->p_flags_valid = 1;
5657 /* If the first section in the input segment is removed, there is
5658 no need to preserve segment physical address in the corresponding
5660 if (!first_section || first_section->output_section != NULL)
5662 map->p_paddr = segment->p_paddr;
5663 map->p_paddr_valid = p_paddr_valid;
5666 /* Determine if this segment contains the ELF file header
5667 and if it contains the program headers themselves. */
5668 map->includes_filehdr = (segment->p_offset == 0
5669 && segment->p_filesz >= iehdr->e_ehsize);
5670 map->includes_phdrs = 0;
5672 if (!phdr_included || segment->p_type != PT_LOAD)
5674 map->includes_phdrs =
5675 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
5676 && (segment->p_offset + segment->p_filesz
5677 >= ((bfd_vma) iehdr->e_phoff
5678 + iehdr->e_phnum * iehdr->e_phentsize)));
5680 if (segment->p_type == PT_LOAD && map->includes_phdrs)
5681 phdr_included = TRUE;
5684 if (section_count == 0)
5686 /* Special segments, such as the PT_PHDR segment, may contain
5687 no sections, but ordinary, loadable segments should contain
5688 something. They are allowed by the ELF spec however, so only
5689 a warning is produced. */
5690 if (segment->p_type == PT_LOAD)
5691 (*_bfd_error_handler) (_("%B: warning: Empty loadable segment"
5692 " detected, is this intentional ?\n"),
5696 *pointer_to_map = map;
5697 pointer_to_map = &map->next;
5702 /* Now scan the sections in the input BFD again and attempt
5703 to add their corresponding output sections to the segment map.
5704 The problem here is how to handle an output section which has
5705 been moved (ie had its LMA changed). There are four possibilities:
5707 1. None of the sections have been moved.
5708 In this case we can continue to use the segment LMA from the
5711 2. All of the sections have been moved by the same amount.
5712 In this case we can change the segment's LMA to match the LMA
5713 of the first section.
5715 3. Some of the sections have been moved, others have not.
5716 In this case those sections which have not been moved can be
5717 placed in the current segment which will have to have its size,
5718 and possibly its LMA changed, and a new segment or segments will
5719 have to be created to contain the other sections.
5721 4. The sections have been moved, but not by the same amount.
5722 In this case we can change the segment's LMA to match the LMA
5723 of the first section and we will have to create a new segment
5724 or segments to contain the other sections.
5726 In order to save time, we allocate an array to hold the section
5727 pointers that we are interested in. As these sections get assigned
5728 to a segment, they are removed from this array. */
5730 sections = (asection **) bfd_malloc2 (section_count, sizeof (asection *));
5731 if (sections == NULL)
5734 /* Step One: Scan for segment vs section LMA conflicts.
5735 Also add the sections to the section array allocated above.
5736 Also add the sections to the current segment. In the common
5737 case, where the sections have not been moved, this means that
5738 we have completely filled the segment, and there is nothing
5743 first_matching_lma = TRUE;
5744 first_suggested_lma = TRUE;
5746 for (section = ibfd->sections;
5748 section = section->next)
5749 if (section == first_section)
5752 for (j = 0; section != NULL; section = section->next)
5754 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
5756 output_section = section->output_section;
5758 sections[j++] = section;
5760 /* The Solaris native linker always sets p_paddr to 0.
5761 We try to catch that case here, and set it to the
5762 correct value. Note - some backends require that
5763 p_paddr be left as zero. */
5765 && segment->p_vaddr != 0
5766 && !bed->want_p_paddr_set_to_zero
5768 && output_section->lma != 0
5769 && output_section->vma == (segment->p_vaddr
5770 + (map->includes_filehdr
5773 + (map->includes_phdrs
5775 * iehdr->e_phentsize)
5777 map->p_paddr = segment->p_vaddr;
5779 /* Match up the physical address of the segment with the
5780 LMA address of the output section. */
5781 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5782 || IS_COREFILE_NOTE (segment, section)
5783 || (bed->want_p_paddr_set_to_zero
5784 && IS_CONTAINED_BY_VMA (output_section, segment)))
5786 if (first_matching_lma || output_section->lma < matching_lma)
5788 matching_lma = output_section->lma;
5789 first_matching_lma = FALSE;
5792 /* We assume that if the section fits within the segment
5793 then it does not overlap any other section within that
5795 map->sections[isec++] = output_section;
5797 else if (first_suggested_lma)
5799 suggested_lma = output_section->lma;
5800 first_suggested_lma = FALSE;
5803 if (j == section_count)
5808 BFD_ASSERT (j == section_count);
5810 /* Step Two: Adjust the physical address of the current segment,
5812 if (isec == section_count)
5814 /* All of the sections fitted within the segment as currently
5815 specified. This is the default case. Add the segment to
5816 the list of built segments and carry on to process the next
5817 program header in the input BFD. */
5818 map->count = section_count;
5819 *pointer_to_map = map;
5820 pointer_to_map = &map->next;
5823 && !bed->want_p_paddr_set_to_zero
5824 && matching_lma != map->p_paddr
5825 && !map->includes_filehdr
5826 && !map->includes_phdrs)
5827 /* There is some padding before the first section in the
5828 segment. So, we must account for that in the output
5830 map->p_vaddr_offset = matching_lma - map->p_paddr;
5837 if (!first_matching_lma)
5839 /* At least one section fits inside the current segment.
5840 Keep it, but modify its physical address to match the
5841 LMA of the first section that fitted. */
5842 map->p_paddr = matching_lma;
5846 /* None of the sections fitted inside the current segment.
5847 Change the current segment's physical address to match
5848 the LMA of the first section. */
5849 map->p_paddr = suggested_lma;
5852 /* Offset the segment physical address from the lma
5853 to allow for space taken up by elf headers. */
5854 if (map->includes_filehdr)
5856 if (map->p_paddr >= iehdr->e_ehsize)
5857 map->p_paddr -= iehdr->e_ehsize;
5860 map->includes_filehdr = FALSE;
5861 map->includes_phdrs = FALSE;
5865 if (map->includes_phdrs)
5867 if (map->p_paddr >= iehdr->e_phnum * iehdr->e_phentsize)
5869 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
5871 /* iehdr->e_phnum is just an estimate of the number
5872 of program headers that we will need. Make a note
5873 here of the number we used and the segment we chose
5874 to hold these headers, so that we can adjust the
5875 offset when we know the correct value. */
5876 phdr_adjust_num = iehdr->e_phnum;
5877 phdr_adjust_seg = map;
5880 map->includes_phdrs = FALSE;
5884 /* Step Three: Loop over the sections again, this time assigning
5885 those that fit to the current segment and removing them from the
5886 sections array; but making sure not to leave large gaps. Once all
5887 possible sections have been assigned to the current segment it is
5888 added to the list of built segments and if sections still remain
5889 to be assigned, a new segment is constructed before repeating
5896 first_suggested_lma = TRUE;
5898 /* Fill the current segment with sections that fit. */
5899 for (j = 0; j < section_count; j++)
5901 section = sections[j];
5903 if (section == NULL)
5906 output_section = section->output_section;
5908 BFD_ASSERT (output_section != NULL);
5910 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
5911 || IS_COREFILE_NOTE (segment, section))
5913 if (map->count == 0)
5915 /* If the first section in a segment does not start at
5916 the beginning of the segment, then something is
5918 if (output_section->lma
5920 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
5921 + (map->includes_phdrs
5922 ? iehdr->e_phnum * iehdr->e_phentsize
5930 prev_sec = map->sections[map->count - 1];
5932 /* If the gap between the end of the previous section
5933 and the start of this section is more than
5934 maxpagesize then we need to start a new segment. */
5935 if ((BFD_ALIGN (prev_sec->lma + prev_sec->size,
5937 < BFD_ALIGN (output_section->lma, maxpagesize))
5938 || (prev_sec->lma + prev_sec->size
5939 > output_section->lma))
5941 if (first_suggested_lma)
5943 suggested_lma = output_section->lma;
5944 first_suggested_lma = FALSE;
5951 map->sections[map->count++] = output_section;
5954 section->segment_mark = TRUE;
5956 else if (first_suggested_lma)
5958 suggested_lma = output_section->lma;
5959 first_suggested_lma = FALSE;
5963 BFD_ASSERT (map->count > 0);
5965 /* Add the current segment to the list of built segments. */
5966 *pointer_to_map = map;
5967 pointer_to_map = &map->next;
5969 if (isec < section_count)
5971 /* We still have not allocated all of the sections to
5972 segments. Create a new segment here, initialise it
5973 and carry on looping. */
5974 amt = sizeof (struct elf_segment_map);
5975 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
5976 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
5983 /* Initialise the fields of the segment map. Set the physical
5984 physical address to the LMA of the first section that has
5985 not yet been assigned. */
5987 map->p_type = segment->p_type;
5988 map->p_flags = segment->p_flags;
5989 map->p_flags_valid = 1;
5990 map->p_paddr = suggested_lma;
5991 map->p_paddr_valid = p_paddr_valid;
5992 map->includes_filehdr = 0;
5993 map->includes_phdrs = 0;
5996 while (isec < section_count);
6001 elf_tdata (obfd)->segment_map = map_first;
6003 /* If we had to estimate the number of program headers that were
6004 going to be needed, then check our estimate now and adjust
6005 the offset if necessary. */
6006 if (phdr_adjust_seg != NULL)
6010 for (count = 0, map = map_first; map != NULL; map = map->next)
6013 if (count > phdr_adjust_num)
6014 phdr_adjust_seg->p_paddr
6015 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
6020 #undef IS_CONTAINED_BY_VMA
6021 #undef IS_CONTAINED_BY_LMA
6023 #undef IS_COREFILE_NOTE
6024 #undef IS_SOLARIS_PT_INTERP
6025 #undef IS_SECTION_IN_INPUT_SEGMENT
6026 #undef INCLUDE_SECTION_IN_SEGMENT
6027 #undef SEGMENT_AFTER_SEGMENT
6028 #undef SEGMENT_OVERLAPS
6032 /* Copy ELF program header information. */
6035 copy_elf_program_header (bfd *ibfd, bfd *obfd)
6037 Elf_Internal_Ehdr *iehdr;
6038 struct elf_segment_map *map;
6039 struct elf_segment_map *map_first;
6040 struct elf_segment_map **pointer_to_map;
6041 Elf_Internal_Phdr *segment;
6043 unsigned int num_segments;
6044 bfd_boolean phdr_included = FALSE;
6045 bfd_boolean p_paddr_valid;
6047 iehdr = elf_elfheader (ibfd);
6050 pointer_to_map = &map_first;
6052 /* If all the segment p_paddr fields are zero, don't set
6053 map->p_paddr_valid. */
6054 p_paddr_valid = FALSE;
6055 num_segments = elf_elfheader (ibfd)->e_phnum;
6056 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6059 if (segment->p_paddr != 0)
6061 p_paddr_valid = TRUE;
6065 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6070 unsigned int section_count;
6072 Elf_Internal_Shdr *this_hdr;
6073 asection *first_section = NULL;
6074 asection *lowest_section;
6076 /* Compute how many sections are in this segment. */
6077 for (section = ibfd->sections, section_count = 0;
6079 section = section->next)
6081 this_hdr = &(elf_section_data(section)->this_hdr);
6082 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6084 if (first_section == NULL)
6085 first_section = section;
6090 /* Allocate a segment map big enough to contain
6091 all of the sections we have selected. */
6092 amt = sizeof (struct elf_segment_map);
6093 if (section_count != 0)
6094 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
6095 map = (struct elf_segment_map *) bfd_zalloc (obfd, amt);
6099 /* Initialize the fields of the output segment map with the
6102 map->p_type = segment->p_type;
6103 map->p_flags = segment->p_flags;
6104 map->p_flags_valid = 1;
6105 map->p_paddr = segment->p_paddr;
6106 map->p_paddr_valid = p_paddr_valid;
6107 map->p_align = segment->p_align;
6108 map->p_align_valid = 1;
6109 map->p_vaddr_offset = 0;
6111 if (map->p_type == PT_GNU_RELRO)
6113 /* The PT_GNU_RELRO segment may contain the first a few
6114 bytes in the .got.plt section even if the whole .got.plt
6115 section isn't in the PT_GNU_RELRO segment. We won't
6116 change the size of the PT_GNU_RELRO segment. */
6117 map->p_size = segment->p_memsz;
6118 map->p_size_valid = 1;
6121 /* Determine if this segment contains the ELF file header
6122 and if it contains the program headers themselves. */
6123 map->includes_filehdr = (segment->p_offset == 0
6124 && segment->p_filesz >= iehdr->e_ehsize);
6126 map->includes_phdrs = 0;
6127 if (! phdr_included || segment->p_type != PT_LOAD)
6129 map->includes_phdrs =
6130 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
6131 && (segment->p_offset + segment->p_filesz
6132 >= ((bfd_vma) iehdr->e_phoff
6133 + iehdr->e_phnum * iehdr->e_phentsize)));
6135 if (segment->p_type == PT_LOAD && map->includes_phdrs)
6136 phdr_included = TRUE;
6139 lowest_section = first_section;
6140 if (section_count != 0)
6142 unsigned int isec = 0;
6144 for (section = first_section;
6146 section = section->next)
6148 this_hdr = &(elf_section_data(section)->this_hdr);
6149 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6151 map->sections[isec++] = section->output_section;
6152 if (section->lma < lowest_section->lma)
6153 lowest_section = section;
6154 if ((section->flags & SEC_ALLOC) != 0)
6158 /* Section lmas are set up from PT_LOAD header
6159 p_paddr in _bfd_elf_make_section_from_shdr.
6160 If this header has a p_paddr that disagrees
6161 with the section lma, flag the p_paddr as
6163 if ((section->flags & SEC_LOAD) != 0)
6164 seg_off = this_hdr->sh_offset - segment->p_offset;
6166 seg_off = this_hdr->sh_addr - segment->p_vaddr;
6167 if (section->lma - segment->p_paddr != seg_off)
6168 map->p_paddr_valid = FALSE;
6170 if (isec == section_count)
6176 if (map->includes_filehdr && lowest_section != NULL)
6177 /* We need to keep the space used by the headers fixed. */
6178 map->header_size = lowest_section->vma - segment->p_vaddr;
6180 if (!map->includes_phdrs
6181 && !map->includes_filehdr
6182 && map->p_paddr_valid)
6183 /* There is some other padding before the first section. */
6184 map->p_vaddr_offset = ((lowest_section ? lowest_section->lma : 0)
6185 - segment->p_paddr);
6187 map->count = section_count;
6188 *pointer_to_map = map;
6189 pointer_to_map = &map->next;
6192 elf_tdata (obfd)->segment_map = map_first;
6196 /* Copy private BFD data. This copies or rewrites ELF program header
6200 copy_private_bfd_data (bfd *ibfd, bfd *obfd)
6202 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6203 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6206 if (elf_tdata (ibfd)->phdr == NULL)
6209 if (ibfd->xvec == obfd->xvec)
6211 /* Check to see if any sections in the input BFD
6212 covered by ELF program header have changed. */
6213 Elf_Internal_Phdr *segment;
6214 asection *section, *osec;
6215 unsigned int i, num_segments;
6216 Elf_Internal_Shdr *this_hdr;
6217 const struct elf_backend_data *bed;
6219 bed = get_elf_backend_data (ibfd);
6221 /* Regenerate the segment map if p_paddr is set to 0. */
6222 if (bed->want_p_paddr_set_to_zero)
6225 /* Initialize the segment mark field. */
6226 for (section = obfd->sections; section != NULL;
6227 section = section->next)
6228 section->segment_mark = FALSE;
6230 num_segments = elf_elfheader (ibfd)->e_phnum;
6231 for (i = 0, segment = elf_tdata (ibfd)->phdr;
6235 /* PR binutils/3535. The Solaris linker always sets the p_paddr
6236 and p_memsz fields of special segments (DYNAMIC, INTERP) to 0
6237 which severly confuses things, so always regenerate the segment
6238 map in this case. */
6239 if (segment->p_paddr == 0
6240 && segment->p_memsz == 0
6241 && (segment->p_type == PT_INTERP || segment->p_type == PT_DYNAMIC))
6244 for (section = ibfd->sections;
6245 section != NULL; section = section->next)
6247 /* We mark the output section so that we know it comes
6248 from the input BFD. */
6249 osec = section->output_section;
6251 osec->segment_mark = TRUE;
6253 /* Check if this section is covered by the segment. */
6254 this_hdr = &(elf_section_data(section)->this_hdr);
6255 if (ELF_SECTION_IN_SEGMENT (this_hdr, segment))
6257 /* FIXME: Check if its output section is changed or
6258 removed. What else do we need to check? */
6260 || section->flags != osec->flags
6261 || section->lma != osec->lma
6262 || section->vma != osec->vma
6263 || section->size != osec->size
6264 || section->rawsize != osec->rawsize
6265 || section->alignment_power != osec->alignment_power)
6271 /* Check to see if any output section do not come from the
6273 for (section = obfd->sections; section != NULL;
6274 section = section->next)
6276 if (section->segment_mark == FALSE)
6279 section->segment_mark = FALSE;
6282 return copy_elf_program_header (ibfd, obfd);
6286 return rewrite_elf_program_header (ibfd, obfd);
6289 /* Initialize private output section information from input section. */
6292 _bfd_elf_init_private_section_data (bfd *ibfd,
6296 struct bfd_link_info *link_info)
6299 Elf_Internal_Shdr *ihdr, *ohdr;
6300 bfd_boolean final_link = link_info != NULL && !link_info->relocatable;
6302 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6303 || obfd->xvec->flavour != bfd_target_elf_flavour)
6306 BFD_ASSERT (elf_section_data (osec) != NULL);
6308 /* For objcopy and relocatable link, don't copy the output ELF
6309 section type from input if the output BFD section flags have been
6310 set to something different. For a final link allow some flags
6311 that the linker clears to differ. */
6312 if (elf_section_type (osec) == SHT_NULL
6313 && (osec->flags == isec->flags
6315 && ((osec->flags ^ isec->flags)
6316 & ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC)) == 0)))
6317 elf_section_type (osec) = elf_section_type (isec);
6319 /* FIXME: Is this correct for all OS/PROC specific flags? */
6320 elf_section_flags (osec) |= (elf_section_flags (isec)
6321 & (SHF_MASKOS | SHF_MASKPROC));
6323 /* Set things up for objcopy and relocatable link. The output
6324 SHT_GROUP section will have its elf_next_in_group pointing back
6325 to the input group members. Ignore linker created group section.
6326 See elfNN_ia64_object_p in elfxx-ia64.c. */
6329 if (elf_sec_group (isec) == NULL
6330 || (elf_sec_group (isec)->flags & SEC_LINKER_CREATED) == 0)
6332 if (elf_section_flags (isec) & SHF_GROUP)
6333 elf_section_flags (osec) |= SHF_GROUP;
6334 elf_next_in_group (osec) = elf_next_in_group (isec);
6335 elf_section_data (osec)->group = elf_section_data (isec)->group;
6339 ihdr = &elf_section_data (isec)->this_hdr;
6341 /* We need to handle elf_linked_to_section for SHF_LINK_ORDER. We
6342 don't use the output section of the linked-to section since it
6343 may be NULL at this point. */
6344 if ((ihdr->sh_flags & SHF_LINK_ORDER) != 0)
6346 ohdr = &elf_section_data (osec)->this_hdr;
6347 ohdr->sh_flags |= SHF_LINK_ORDER;
6348 elf_linked_to_section (osec) = elf_linked_to_section (isec);
6351 osec->use_rela_p = isec->use_rela_p;
6356 /* Copy private section information. This copies over the entsize
6357 field, and sometimes the info field. */
6360 _bfd_elf_copy_private_section_data (bfd *ibfd,
6365 Elf_Internal_Shdr *ihdr, *ohdr;
6367 if (ibfd->xvec->flavour != bfd_target_elf_flavour
6368 || obfd->xvec->flavour != bfd_target_elf_flavour)
6371 ihdr = &elf_section_data (isec)->this_hdr;
6372 ohdr = &elf_section_data (osec)->this_hdr;
6374 ohdr->sh_entsize = ihdr->sh_entsize;
6376 if (ihdr->sh_type == SHT_SYMTAB
6377 || ihdr->sh_type == SHT_DYNSYM
6378 || ihdr->sh_type == SHT_GNU_verneed
6379 || ihdr->sh_type == SHT_GNU_verdef)
6380 ohdr->sh_info = ihdr->sh_info;
6382 return _bfd_elf_init_private_section_data (ibfd, isec, obfd, osec,
6386 /* Look at all the SHT_GROUP sections in IBFD, making any adjustments
6387 necessary if we are removing either the SHT_GROUP section or any of
6388 the group member sections. DISCARDED is the value that a section's
6389 output_section has if the section will be discarded, NULL when this
6390 function is called from objcopy, bfd_abs_section_ptr when called
6394 _bfd_elf_fixup_group_sections (bfd *ibfd, asection *discarded)
6398 for (isec = ibfd->sections; isec != NULL; isec = isec->next)
6399 if (elf_section_type (isec) == SHT_GROUP)
6401 asection *first = elf_next_in_group (isec);
6402 asection *s = first;
6403 bfd_size_type removed = 0;
6407 /* If this member section is being output but the
6408 SHT_GROUP section is not, then clear the group info
6409 set up by _bfd_elf_copy_private_section_data. */
6410 if (s->output_section != discarded
6411 && isec->output_section == discarded)
6413 elf_section_flags (s->output_section) &= ~SHF_GROUP;
6414 elf_group_name (s->output_section) = NULL;
6416 /* Conversely, if the member section is not being output
6417 but the SHT_GROUP section is, then adjust its size. */
6418 else if (s->output_section == discarded
6419 && isec->output_section != discarded)
6421 s = elf_next_in_group (s);
6427 if (discarded != NULL)
6429 /* If we've been called for ld -r, then we need to
6430 adjust the input section size. This function may
6431 be called multiple times, so save the original
6433 if (isec->rawsize == 0)
6434 isec->rawsize = isec->size;
6435 isec->size = isec->rawsize - removed;
6439 /* Adjust the output section size when called from
6441 isec->output_section->size -= removed;
6449 /* Copy private header information. */
6452 _bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
6454 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6455 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6458 /* Copy over private BFD data if it has not already been copied.
6459 This must be done here, rather than in the copy_private_bfd_data
6460 entry point, because the latter is called after the section
6461 contents have been set, which means that the program headers have
6462 already been worked out. */
6463 if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
6465 if (! copy_private_bfd_data (ibfd, obfd))
6469 return _bfd_elf_fixup_group_sections (ibfd, NULL);
6472 /* Copy private symbol information. If this symbol is in a section
6473 which we did not map into a BFD section, try to map the section
6474 index correctly. We use special macro definitions for the mapped
6475 section indices; these definitions are interpreted by the
6476 swap_out_syms function. */
6478 #define MAP_ONESYMTAB (SHN_HIOS + 1)
6479 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
6480 #define MAP_STRTAB (SHN_HIOS + 3)
6481 #define MAP_SHSTRTAB (SHN_HIOS + 4)
6482 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
6485 _bfd_elf_copy_private_symbol_data (bfd *ibfd,
6490 elf_symbol_type *isym, *osym;
6492 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
6493 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
6496 isym = elf_symbol_from (ibfd, isymarg);
6497 osym = elf_symbol_from (obfd, osymarg);
6500 && isym->internal_elf_sym.st_shndx != 0
6502 && bfd_is_abs_section (isym->symbol.section))
6506 shndx = isym->internal_elf_sym.st_shndx;
6507 if (shndx == elf_onesymtab (ibfd))
6508 shndx = MAP_ONESYMTAB;
6509 else if (shndx == elf_dynsymtab (ibfd))
6510 shndx = MAP_DYNSYMTAB;
6511 else if (shndx == elf_tdata (ibfd)->strtab_section)
6513 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
6514 shndx = MAP_SHSTRTAB;
6515 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
6516 shndx = MAP_SYM_SHNDX;
6517 osym->internal_elf_sym.st_shndx = shndx;
6523 /* Swap out the symbols. */
6526 swap_out_syms (bfd *abfd,
6527 struct bfd_strtab_hash **sttp,
6530 const struct elf_backend_data *bed;
6533 struct bfd_strtab_hash *stt;
6534 Elf_Internal_Shdr *symtab_hdr;
6535 Elf_Internal_Shdr *symtab_shndx_hdr;
6536 Elf_Internal_Shdr *symstrtab_hdr;
6537 bfd_byte *outbound_syms;
6538 bfd_byte *outbound_shndx;
6541 bfd_boolean name_local_sections;
6543 if (!elf_map_symbols (abfd))
6546 /* Dump out the symtabs. */
6547 stt = _bfd_elf_stringtab_init ();
6551 bed = get_elf_backend_data (abfd);
6552 symcount = bfd_get_symcount (abfd);
6553 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
6554 symtab_hdr->sh_type = SHT_SYMTAB;
6555 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
6556 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
6557 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
6558 symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align;
6560 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
6561 symstrtab_hdr->sh_type = SHT_STRTAB;
6563 outbound_syms = (bfd_byte *) bfd_alloc2 (abfd, 1 + symcount,
6564 bed->s->sizeof_sym);
6565 if (outbound_syms == NULL)
6567 _bfd_stringtab_free (stt);
6570 symtab_hdr->contents = outbound_syms;
6572 outbound_shndx = NULL;
6573 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
6574 if (symtab_shndx_hdr->sh_name != 0)
6576 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
6577 outbound_shndx = (bfd_byte *)
6578 bfd_zalloc2 (abfd, 1 + symcount, sizeof (Elf_External_Sym_Shndx));
6579 if (outbound_shndx == NULL)
6581 _bfd_stringtab_free (stt);
6585 symtab_shndx_hdr->contents = outbound_shndx;
6586 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
6587 symtab_shndx_hdr->sh_size = amt;
6588 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
6589 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
6592 /* Now generate the data (for "contents"). */
6594 /* Fill in zeroth symbol and swap it out. */
6595 Elf_Internal_Sym sym;
6601 sym.st_shndx = SHN_UNDEF;
6602 sym.st_target_internal = 0;
6603 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6604 outbound_syms += bed->s->sizeof_sym;
6605 if (outbound_shndx != NULL)
6606 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6610 = (bed->elf_backend_name_local_section_symbols
6611 && bed->elf_backend_name_local_section_symbols (abfd));
6613 syms = bfd_get_outsymbols (abfd);
6614 for (idx = 0; idx < symcount; idx++)
6616 Elf_Internal_Sym sym;
6617 bfd_vma value = syms[idx]->value;
6618 elf_symbol_type *type_ptr;
6619 flagword flags = syms[idx]->flags;
6622 if (!name_local_sections
6623 && (flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
6625 /* Local section symbols have no name. */
6630 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
6633 if (sym.st_name == (unsigned long) -1)
6635 _bfd_stringtab_free (stt);
6640 type_ptr = elf_symbol_from (abfd, syms[idx]);
6642 if ((flags & BSF_SECTION_SYM) == 0
6643 && bfd_is_com_section (syms[idx]->section))
6645 /* ELF common symbols put the alignment into the `value' field,
6646 and the size into the `size' field. This is backwards from
6647 how BFD handles it, so reverse it here. */
6648 sym.st_size = value;
6649 if (type_ptr == NULL
6650 || type_ptr->internal_elf_sym.st_value == 0)
6651 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
6653 sym.st_value = type_ptr->internal_elf_sym.st_value;
6654 sym.st_shndx = _bfd_elf_section_from_bfd_section
6655 (abfd, syms[idx]->section);
6659 asection *sec = syms[idx]->section;
6662 if (sec->output_section)
6664 value += sec->output_offset;
6665 sec = sec->output_section;
6668 /* Don't add in the section vma for relocatable output. */
6669 if (! relocatable_p)
6671 sym.st_value = value;
6672 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
6674 if (bfd_is_abs_section (sec)
6676 && type_ptr->internal_elf_sym.st_shndx != 0)
6678 /* This symbol is in a real ELF section which we did
6679 not create as a BFD section. Undo the mapping done
6680 by copy_private_symbol_data. */
6681 shndx = type_ptr->internal_elf_sym.st_shndx;
6685 shndx = elf_onesymtab (abfd);
6688 shndx = elf_dynsymtab (abfd);
6691 shndx = elf_tdata (abfd)->strtab_section;
6694 shndx = elf_tdata (abfd)->shstrtab_section;
6697 shndx = elf_tdata (abfd)->symtab_shndx_section;
6705 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
6707 if (shndx == SHN_BAD)
6711 /* Writing this would be a hell of a lot easier if
6712 we had some decent documentation on bfd, and
6713 knew what to expect of the library, and what to
6714 demand of applications. For example, it
6715 appears that `objcopy' might not set the
6716 section of a symbol to be a section that is
6717 actually in the output file. */
6718 sec2 = bfd_get_section_by_name (abfd, sec->name);
6721 _bfd_error_handler (_("\
6722 Unable to find equivalent output section for symbol '%s' from section '%s'"),
6723 syms[idx]->name ? syms[idx]->name : "<Local sym>",
6725 bfd_set_error (bfd_error_invalid_operation);
6726 _bfd_stringtab_free (stt);
6730 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
6731 BFD_ASSERT (shndx != SHN_BAD);
6735 sym.st_shndx = shndx;
6738 if ((flags & BSF_THREAD_LOCAL) != 0)
6740 else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0)
6741 type = STT_GNU_IFUNC;
6742 else if ((flags & BSF_FUNCTION) != 0)
6744 else if ((flags & BSF_OBJECT) != 0)
6746 else if ((flags & BSF_RELC) != 0)
6748 else if ((flags & BSF_SRELC) != 0)
6753 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
6756 /* Processor-specific types. */
6757 if (type_ptr != NULL
6758 && bed->elf_backend_get_symbol_type)
6759 type = ((*bed->elf_backend_get_symbol_type)
6760 (&type_ptr->internal_elf_sym, type));
6762 if (flags & BSF_SECTION_SYM)
6764 if (flags & BSF_GLOBAL)
6765 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
6767 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
6769 else if (bfd_is_com_section (syms[idx]->section))
6771 #ifdef USE_STT_COMMON
6772 if (type == STT_OBJECT)
6773 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_COMMON);
6776 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
6778 else if (bfd_is_und_section (syms[idx]->section))
6779 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
6783 else if (flags & BSF_FILE)
6784 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
6787 int bind = STB_LOCAL;
6789 if (flags & BSF_LOCAL)
6791 else if (flags & BSF_GNU_UNIQUE)
6792 bind = STB_GNU_UNIQUE;
6793 else if (flags & BSF_WEAK)
6795 else if (flags & BSF_GLOBAL)
6798 sym.st_info = ELF_ST_INFO (bind, type);
6801 if (type_ptr != NULL)
6803 sym.st_other = type_ptr->internal_elf_sym.st_other;
6804 sym.st_target_internal
6805 = type_ptr->internal_elf_sym.st_target_internal;
6810 sym.st_target_internal = 0;
6813 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
6814 outbound_syms += bed->s->sizeof_sym;
6815 if (outbound_shndx != NULL)
6816 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
6820 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
6821 symstrtab_hdr->sh_type = SHT_STRTAB;
6823 symstrtab_hdr->sh_flags = 0;
6824 symstrtab_hdr->sh_addr = 0;
6825 symstrtab_hdr->sh_entsize = 0;
6826 symstrtab_hdr->sh_link = 0;
6827 symstrtab_hdr->sh_info = 0;
6828 symstrtab_hdr->sh_addralign = 1;
6833 /* Return the number of bytes required to hold the symtab vector.
6835 Note that we base it on the count plus 1, since we will null terminate
6836 the vector allocated based on this size. However, the ELF symbol table
6837 always has a dummy entry as symbol #0, so it ends up even. */
6840 _bfd_elf_get_symtab_upper_bound (bfd *abfd)
6844 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
6846 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6847 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6849 symtab_size -= sizeof (asymbol *);
6855 _bfd_elf_get_dynamic_symtab_upper_bound (bfd *abfd)
6859 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
6861 if (elf_dynsymtab (abfd) == 0)
6863 bfd_set_error (bfd_error_invalid_operation);
6867 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
6868 symtab_size = (symcount + 1) * (sizeof (asymbol *));
6870 symtab_size -= sizeof (asymbol *);
6876 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
6879 return (asect->reloc_count + 1) * sizeof (arelent *);
6882 /* Canonicalize the relocs. */
6885 _bfd_elf_canonicalize_reloc (bfd *abfd,
6892 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6894 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
6897 tblptr = section->relocation;
6898 for (i = 0; i < section->reloc_count; i++)
6899 *relptr++ = tblptr++;
6903 return section->reloc_count;
6907 _bfd_elf_canonicalize_symtab (bfd *abfd, asymbol **allocation)
6909 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6910 long symcount = bed->s->slurp_symbol_table (abfd, allocation, FALSE);
6913 bfd_get_symcount (abfd) = symcount;
6918 _bfd_elf_canonicalize_dynamic_symtab (bfd *abfd,
6919 asymbol **allocation)
6921 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6922 long symcount = bed->s->slurp_symbol_table (abfd, allocation, TRUE);
6925 bfd_get_dynamic_symcount (abfd) = symcount;
6929 /* Return the size required for the dynamic reloc entries. Any loadable
6930 section that was actually installed in the BFD, and has type SHT_REL
6931 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6932 dynamic reloc section. */
6935 _bfd_elf_get_dynamic_reloc_upper_bound (bfd *abfd)
6940 if (elf_dynsymtab (abfd) == 0)
6942 bfd_set_error (bfd_error_invalid_operation);
6946 ret = sizeof (arelent *);
6947 for (s = abfd->sections; s != NULL; s = s->next)
6948 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6949 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6950 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6951 ret += ((s->size / elf_section_data (s)->this_hdr.sh_entsize)
6952 * sizeof (arelent *));
6957 /* Canonicalize the dynamic relocation entries. Note that we return the
6958 dynamic relocations as a single block, although they are actually
6959 associated with particular sections; the interface, which was
6960 designed for SunOS style shared libraries, expects that there is only
6961 one set of dynamic relocs. Any loadable section that was actually
6962 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6963 dynamic symbol table, is considered to be a dynamic reloc section. */
6966 _bfd_elf_canonicalize_dynamic_reloc (bfd *abfd,
6970 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6974 if (elf_dynsymtab (abfd) == 0)
6976 bfd_set_error (bfd_error_invalid_operation);
6980 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6982 for (s = abfd->sections; s != NULL; s = s->next)
6984 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
6985 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
6986 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
6991 if (! (*slurp_relocs) (abfd, s, syms, TRUE))
6993 count = s->size / elf_section_data (s)->this_hdr.sh_entsize;
6995 for (i = 0; i < count; i++)
7006 /* Read in the version information. */
7009 _bfd_elf_slurp_version_tables (bfd *abfd, bfd_boolean default_imported_symver)
7011 bfd_byte *contents = NULL;
7012 unsigned int freeidx = 0;
7014 if (elf_dynverref (abfd) != 0)
7016 Elf_Internal_Shdr *hdr;
7017 Elf_External_Verneed *everneed;
7018 Elf_Internal_Verneed *iverneed;
7020 bfd_byte *contents_end;
7022 hdr = &elf_tdata (abfd)->dynverref_hdr;
7024 elf_tdata (abfd)->verref = (Elf_Internal_Verneed *)
7025 bfd_zalloc2 (abfd, hdr->sh_info, sizeof (Elf_Internal_Verneed));
7026 if (elf_tdata (abfd)->verref == NULL)
7029 elf_tdata (abfd)->cverrefs = hdr->sh_info;
7031 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7032 if (contents == NULL)
7034 error_return_verref:
7035 elf_tdata (abfd)->verref = NULL;
7036 elf_tdata (abfd)->cverrefs = 0;
7039 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7040 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7041 goto error_return_verref;
7043 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verneed))
7044 goto error_return_verref;
7046 BFD_ASSERT (sizeof (Elf_External_Verneed)
7047 == sizeof (Elf_External_Vernaux));
7048 contents_end = contents + hdr->sh_size - sizeof (Elf_External_Verneed);
7049 everneed = (Elf_External_Verneed *) contents;
7050 iverneed = elf_tdata (abfd)->verref;
7051 for (i = 0; i < hdr->sh_info; i++, iverneed++)
7053 Elf_External_Vernaux *evernaux;
7054 Elf_Internal_Vernaux *ivernaux;
7057 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
7059 iverneed->vn_bfd = abfd;
7061 iverneed->vn_filename =
7062 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7064 if (iverneed->vn_filename == NULL)
7065 goto error_return_verref;
7067 if (iverneed->vn_cnt == 0)
7068 iverneed->vn_auxptr = NULL;
7071 iverneed->vn_auxptr = (struct elf_internal_vernaux *)
7072 bfd_alloc2 (abfd, iverneed->vn_cnt,
7073 sizeof (Elf_Internal_Vernaux));
7074 if (iverneed->vn_auxptr == NULL)
7075 goto error_return_verref;
7078 if (iverneed->vn_aux
7079 > (size_t) (contents_end - (bfd_byte *) everneed))
7080 goto error_return_verref;
7082 evernaux = ((Elf_External_Vernaux *)
7083 ((bfd_byte *) everneed + iverneed->vn_aux));
7084 ivernaux = iverneed->vn_auxptr;
7085 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
7087 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
7089 ivernaux->vna_nodename =
7090 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7091 ivernaux->vna_name);
7092 if (ivernaux->vna_nodename == NULL)
7093 goto error_return_verref;
7095 if (j + 1 < iverneed->vn_cnt)
7096 ivernaux->vna_nextptr = ivernaux + 1;
7098 ivernaux->vna_nextptr = NULL;
7100 if (ivernaux->vna_next
7101 > (size_t) (contents_end - (bfd_byte *) evernaux))
7102 goto error_return_verref;
7104 evernaux = ((Elf_External_Vernaux *)
7105 ((bfd_byte *) evernaux + ivernaux->vna_next));
7107 if (ivernaux->vna_other > freeidx)
7108 freeidx = ivernaux->vna_other;
7111 if (i + 1 < hdr->sh_info)
7112 iverneed->vn_nextref = iverneed + 1;
7114 iverneed->vn_nextref = NULL;
7116 if (iverneed->vn_next
7117 > (size_t) (contents_end - (bfd_byte *) everneed))
7118 goto error_return_verref;
7120 everneed = ((Elf_External_Verneed *)
7121 ((bfd_byte *) everneed + iverneed->vn_next));
7128 if (elf_dynverdef (abfd) != 0)
7130 Elf_Internal_Shdr *hdr;
7131 Elf_External_Verdef *everdef;
7132 Elf_Internal_Verdef *iverdef;
7133 Elf_Internal_Verdef *iverdefarr;
7134 Elf_Internal_Verdef iverdefmem;
7136 unsigned int maxidx;
7137 bfd_byte *contents_end_def, *contents_end_aux;
7139 hdr = &elf_tdata (abfd)->dynverdef_hdr;
7141 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
7142 if (contents == NULL)
7144 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
7145 || bfd_bread (contents, hdr->sh_size, abfd) != hdr->sh_size)
7148 if (hdr->sh_info && hdr->sh_size < sizeof (Elf_External_Verdef))
7151 BFD_ASSERT (sizeof (Elf_External_Verdef)
7152 >= sizeof (Elf_External_Verdaux));
7153 contents_end_def = contents + hdr->sh_size
7154 - sizeof (Elf_External_Verdef);
7155 contents_end_aux = contents + hdr->sh_size
7156 - sizeof (Elf_External_Verdaux);
7158 /* We know the number of entries in the section but not the maximum
7159 index. Therefore we have to run through all entries and find
7161 everdef = (Elf_External_Verdef *) contents;
7163 for (i = 0; i < hdr->sh_info; ++i)
7165 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7167 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
7168 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
7170 if (iverdefmem.vd_next
7171 > (size_t) (contents_end_def - (bfd_byte *) everdef))
7174 everdef = ((Elf_External_Verdef *)
7175 ((bfd_byte *) everdef + iverdefmem.vd_next));
7178 if (default_imported_symver)
7180 if (freeidx > maxidx)
7185 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7186 bfd_zalloc2 (abfd, maxidx, sizeof (Elf_Internal_Verdef));
7187 if (elf_tdata (abfd)->verdef == NULL)
7190 elf_tdata (abfd)->cverdefs = maxidx;
7192 everdef = (Elf_External_Verdef *) contents;
7193 iverdefarr = elf_tdata (abfd)->verdef;
7194 for (i = 0; i < hdr->sh_info; i++)
7196 Elf_External_Verdaux *everdaux;
7197 Elf_Internal_Verdaux *iverdaux;
7200 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
7202 if ((iverdefmem.vd_ndx & VERSYM_VERSION) == 0)
7204 error_return_verdef:
7205 elf_tdata (abfd)->verdef = NULL;
7206 elf_tdata (abfd)->cverdefs = 0;
7210 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
7211 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
7213 iverdef->vd_bfd = abfd;
7215 if (iverdef->vd_cnt == 0)
7216 iverdef->vd_auxptr = NULL;
7219 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7220 bfd_alloc2 (abfd, iverdef->vd_cnt,
7221 sizeof (Elf_Internal_Verdaux));
7222 if (iverdef->vd_auxptr == NULL)
7223 goto error_return_verdef;
7227 > (size_t) (contents_end_aux - (bfd_byte *) everdef))
7228 goto error_return_verdef;
7230 everdaux = ((Elf_External_Verdaux *)
7231 ((bfd_byte *) everdef + iverdef->vd_aux));
7232 iverdaux = iverdef->vd_auxptr;
7233 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
7235 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
7237 iverdaux->vda_nodename =
7238 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
7239 iverdaux->vda_name);
7240 if (iverdaux->vda_nodename == NULL)
7241 goto error_return_verdef;
7243 if (j + 1 < iverdef->vd_cnt)
7244 iverdaux->vda_nextptr = iverdaux + 1;
7246 iverdaux->vda_nextptr = NULL;
7248 if (iverdaux->vda_next
7249 > (size_t) (contents_end_aux - (bfd_byte *) everdaux))
7250 goto error_return_verdef;
7252 everdaux = ((Elf_External_Verdaux *)
7253 ((bfd_byte *) everdaux + iverdaux->vda_next));
7256 if (iverdef->vd_cnt)
7257 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
7259 if ((size_t) (iverdef - iverdefarr) + 1 < maxidx)
7260 iverdef->vd_nextdef = iverdef + 1;
7262 iverdef->vd_nextdef = NULL;
7264 everdef = ((Elf_External_Verdef *)
7265 ((bfd_byte *) everdef + iverdef->vd_next));
7271 else if (default_imported_symver)
7278 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *)
7279 bfd_zalloc2 (abfd, freeidx, sizeof (Elf_Internal_Verdef));
7280 if (elf_tdata (abfd)->verdef == NULL)
7283 elf_tdata (abfd)->cverdefs = freeidx;
7286 /* Create a default version based on the soname. */
7287 if (default_imported_symver)
7289 Elf_Internal_Verdef *iverdef;
7290 Elf_Internal_Verdaux *iverdaux;
7292 iverdef = &elf_tdata (abfd)->verdef[freeidx - 1];;
7294 iverdef->vd_version = VER_DEF_CURRENT;
7295 iverdef->vd_flags = 0;
7296 iverdef->vd_ndx = freeidx;
7297 iverdef->vd_cnt = 1;
7299 iverdef->vd_bfd = abfd;
7301 iverdef->vd_nodename = bfd_elf_get_dt_soname (abfd);
7302 if (iverdef->vd_nodename == NULL)
7303 goto error_return_verdef;
7304 iverdef->vd_nextdef = NULL;
7305 iverdef->vd_auxptr = (struct elf_internal_verdaux *)
7306 bfd_alloc (abfd, sizeof (Elf_Internal_Verdaux));
7307 if (iverdef->vd_auxptr == NULL)
7308 goto error_return_verdef;
7310 iverdaux = iverdef->vd_auxptr;
7311 iverdaux->vda_nodename = iverdef->vd_nodename;
7312 iverdaux->vda_nextptr = NULL;
7318 if (contents != NULL)
7324 _bfd_elf_make_empty_symbol (bfd *abfd)
7326 elf_symbol_type *newsym;
7327 bfd_size_type amt = sizeof (elf_symbol_type);
7329 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
7334 newsym->symbol.the_bfd = abfd;
7335 return &newsym->symbol;
7340 _bfd_elf_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
7344 bfd_symbol_info (symbol, ret);
7347 /* Return whether a symbol name implies a local symbol. Most targets
7348 use this function for the is_local_label_name entry point, but some
7352 _bfd_elf_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
7355 /* Normal local symbols start with ``.L''. */
7356 if (name[0] == '.' && name[1] == 'L')
7359 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
7360 DWARF debugging symbols starting with ``..''. */
7361 if (name[0] == '.' && name[1] == '.')
7364 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
7365 emitting DWARF debugging output. I suspect this is actually a
7366 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
7367 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
7368 underscore to be emitted on some ELF targets). For ease of use,
7369 we treat such symbols as local. */
7370 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
7377 _bfd_elf_get_lineno (bfd *abfd ATTRIBUTE_UNUSED,
7378 asymbol *symbol ATTRIBUTE_UNUSED)
7385 _bfd_elf_set_arch_mach (bfd *abfd,
7386 enum bfd_architecture arch,
7387 unsigned long machine)
7389 /* If this isn't the right architecture for this backend, and this
7390 isn't the generic backend, fail. */
7391 if (arch != get_elf_backend_data (abfd)->arch
7392 && arch != bfd_arch_unknown
7393 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
7396 return bfd_default_set_arch_mach (abfd, arch, machine);
7399 /* Find the function to a particular section and offset,
7400 for error reporting. */
7403 elf_find_function (bfd *abfd,
7407 const char **filename_ptr,
7408 const char **functionname_ptr)
7410 static asection *last_section;
7411 static asymbol *func;
7412 static const char *filename;
7413 static bfd_size_type func_size;
7415 if (symbols == NULL)
7418 if (last_section != section
7420 || offset < func->value
7421 || offset >= func->value + func_size)
7426 /* ??? Given multiple file symbols, it is impossible to reliably
7427 choose the right file name for global symbols. File symbols are
7428 local symbols, and thus all file symbols must sort before any
7429 global symbols. The ELF spec may be interpreted to say that a
7430 file symbol must sort before other local symbols, but currently
7431 ld -r doesn't do this. So, for ld -r output, it is possible to
7432 make a better choice of file name for local symbols by ignoring
7433 file symbols appearing after a given local symbol. */
7434 enum { nothing_seen, symbol_seen, file_after_symbol_seen } state;
7435 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7441 state = nothing_seen;
7443 last_section = section;
7445 for (p = symbols; *p != NULL; p++)
7451 if ((sym->flags & BSF_FILE) != 0)
7454 if (state == symbol_seen)
7455 state = file_after_symbol_seen;
7459 size = bed->maybe_function_sym (sym, section, &code_off);
7461 && code_off <= offset
7462 && (code_off > low_func
7463 || (code_off == low_func
7464 && size > func_size)))
7468 low_func = code_off;
7471 && ((sym->flags & BSF_LOCAL) != 0
7472 || state != file_after_symbol_seen))
7473 filename = bfd_asymbol_name (file);
7475 if (state == nothing_seen)
7476 state = symbol_seen;
7484 *filename_ptr = filename;
7485 if (functionname_ptr)
7486 *functionname_ptr = bfd_asymbol_name (func);
7491 /* Find the nearest line to a particular section and offset,
7492 for error reporting. */
7495 _bfd_elf_find_nearest_line (bfd *abfd,
7499 const char **filename_ptr,
7500 const char **functionname_ptr,
7501 unsigned int *line_ptr)
7505 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
7506 filename_ptr, functionname_ptr,
7509 if (!*functionname_ptr)
7510 elf_find_function (abfd, section, symbols, offset,
7511 *filename_ptr ? NULL : filename_ptr,
7517 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
7518 section, symbols, offset,
7519 filename_ptr, functionname_ptr,
7521 &elf_tdata (abfd)->dwarf2_find_line_info))
7523 if (!*functionname_ptr)
7524 elf_find_function (abfd, section, symbols, offset,
7525 *filename_ptr ? NULL : filename_ptr,
7531 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7532 &found, filename_ptr,
7533 functionname_ptr, line_ptr,
7534 &elf_tdata (abfd)->line_info))
7536 if (found && (*functionname_ptr || *line_ptr))
7539 if (symbols == NULL)
7542 if (! elf_find_function (abfd, section, symbols, offset,
7543 filename_ptr, functionname_ptr))
7550 /* Find the line for a symbol. */
7553 _bfd_elf_find_line (bfd *abfd, asymbol **symbols, asymbol *symbol,
7554 const char **filename_ptr, unsigned int *line_ptr)
7556 return _bfd_dwarf2_find_line (abfd, symbols, symbol,
7557 filename_ptr, line_ptr, 0,
7558 &elf_tdata (abfd)->dwarf2_find_line_info);
7561 /* After a call to bfd_find_nearest_line, successive calls to
7562 bfd_find_inliner_info can be used to get source information about
7563 each level of function inlining that terminated at the address
7564 passed to bfd_find_nearest_line. Currently this is only supported
7565 for DWARF2 with appropriate DWARF3 extensions. */
7568 _bfd_elf_find_inliner_info (bfd *abfd,
7569 const char **filename_ptr,
7570 const char **functionname_ptr,
7571 unsigned int *line_ptr)
7574 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
7575 functionname_ptr, line_ptr,
7576 & elf_tdata (abfd)->dwarf2_find_line_info);
7581 _bfd_elf_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
7583 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7584 int ret = bed->s->sizeof_ehdr;
7586 if (!info->relocatable)
7588 bfd_size_type phdr_size = elf_tdata (abfd)->program_header_size;
7590 if (phdr_size == (bfd_size_type) -1)
7592 struct elf_segment_map *m;
7595 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
7596 phdr_size += bed->s->sizeof_phdr;
7599 phdr_size = get_program_header_size (abfd, info);
7602 elf_tdata (abfd)->program_header_size = phdr_size;
7610 _bfd_elf_set_section_contents (bfd *abfd,
7612 const void *location,
7614 bfd_size_type count)
7616 Elf_Internal_Shdr *hdr;
7619 if (! abfd->output_has_begun
7620 && ! _bfd_elf_compute_section_file_positions (abfd, NULL))
7623 hdr = &elf_section_data (section)->this_hdr;
7624 pos = hdr->sh_offset + offset;
7625 if (bfd_seek (abfd, pos, SEEK_SET) != 0
7626 || bfd_bwrite (location, count, abfd) != count)
7633 _bfd_elf_no_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
7634 arelent *cache_ptr ATTRIBUTE_UNUSED,
7635 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
7640 /* Try to convert a non-ELF reloc into an ELF one. */
7643 _bfd_elf_validate_reloc (bfd *abfd, arelent *areloc)
7645 /* Check whether we really have an ELF howto. */
7647 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
7649 bfd_reloc_code_real_type code;
7650 reloc_howto_type *howto;
7652 /* Alien reloc: Try to determine its type to replace it with an
7653 equivalent ELF reloc. */
7655 if (areloc->howto->pc_relative)
7657 switch (areloc->howto->bitsize)
7660 code = BFD_RELOC_8_PCREL;
7663 code = BFD_RELOC_12_PCREL;
7666 code = BFD_RELOC_16_PCREL;
7669 code = BFD_RELOC_24_PCREL;
7672 code = BFD_RELOC_32_PCREL;
7675 code = BFD_RELOC_64_PCREL;
7681 howto = bfd_reloc_type_lookup (abfd, code);
7683 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
7685 if (howto->pcrel_offset)
7686 areloc->addend += areloc->address;
7688 areloc->addend -= areloc->address; /* addend is unsigned!! */
7693 switch (areloc->howto->bitsize)
7699 code = BFD_RELOC_14;
7702 code = BFD_RELOC_16;
7705 code = BFD_RELOC_26;
7708 code = BFD_RELOC_32;
7711 code = BFD_RELOC_64;
7717 howto = bfd_reloc_type_lookup (abfd, code);
7721 areloc->howto = howto;
7729 (*_bfd_error_handler)
7730 (_("%B: unsupported relocation type %s"),
7731 abfd, areloc->howto->name);
7732 bfd_set_error (bfd_error_bad_value);
7737 _bfd_elf_close_and_cleanup (bfd *abfd)
7739 struct elf_obj_tdata *tdata = elf_tdata (abfd);
7740 if (bfd_get_format (abfd) == bfd_object && tdata != NULL)
7742 if (elf_shstrtab (abfd) != NULL)
7743 _bfd_elf_strtab_free (elf_shstrtab (abfd));
7744 _bfd_dwarf2_cleanup_debug_info (abfd, &tdata->dwarf2_find_line_info);
7747 return _bfd_generic_close_and_cleanup (abfd);
7750 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
7751 in the relocation's offset. Thus we cannot allow any sort of sanity
7752 range-checking to interfere. There is nothing else to do in processing
7755 bfd_reloc_status_type
7756 _bfd_elf_rel_vtable_reloc_fn
7757 (bfd *abfd ATTRIBUTE_UNUSED, arelent *re ATTRIBUTE_UNUSED,
7758 struct bfd_symbol *symbol ATTRIBUTE_UNUSED,
7759 void *data ATTRIBUTE_UNUSED, asection *is ATTRIBUTE_UNUSED,
7760 bfd *obfd ATTRIBUTE_UNUSED, char **errmsg ATTRIBUTE_UNUSED)
7762 return bfd_reloc_ok;
7765 /* Elf core file support. Much of this only works on native
7766 toolchains, since we rely on knowing the
7767 machine-dependent procfs structure in order to pick
7768 out details about the corefile. */
7770 #ifdef HAVE_SYS_PROCFS_H
7771 /* Needed for new procfs interface on sparc-solaris. */
7772 # define _STRUCTURED_PROC 1
7773 # include <sys/procfs.h>
7776 /* Return a PID that identifies a "thread" for threaded cores, or the
7777 PID of the main process for non-threaded cores. */
7780 elfcore_make_pid (bfd *abfd)
7784 pid = elf_tdata (abfd)->core_lwpid;
7786 pid = elf_tdata (abfd)->core_pid;
7791 /* If there isn't a section called NAME, make one, using
7792 data from SECT. Note, this function will generate a
7793 reference to NAME, so you shouldn't deallocate or
7797 elfcore_maybe_make_sect (bfd *abfd, char *name, asection *sect)
7801 if (bfd_get_section_by_name (abfd, name) != NULL)
7804 sect2 = bfd_make_section_with_flags (abfd, name, sect->flags);
7808 sect2->size = sect->size;
7809 sect2->filepos = sect->filepos;
7810 sect2->alignment_power = sect->alignment_power;
7814 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
7815 actually creates up to two pseudosections:
7816 - For the single-threaded case, a section named NAME, unless
7817 such a section already exists.
7818 - For the multi-threaded case, a section named "NAME/PID", where
7819 PID is elfcore_make_pid (abfd).
7820 Both pseudosections have identical contents. */
7822 _bfd_elfcore_make_pseudosection (bfd *abfd,
7828 char *threaded_name;
7832 /* Build the section name. */
7834 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
7835 len = strlen (buf) + 1;
7836 threaded_name = (char *) bfd_alloc (abfd, len);
7837 if (threaded_name == NULL)
7839 memcpy (threaded_name, buf, len);
7841 sect = bfd_make_section_anyway_with_flags (abfd, threaded_name,
7846 sect->filepos = filepos;
7847 sect->alignment_power = 2;
7849 return elfcore_maybe_make_sect (abfd, name, sect);
7852 /* prstatus_t exists on:
7854 linux 2.[01] + glibc
7858 #if defined (HAVE_PRSTATUS_T)
7861 elfcore_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
7866 if (note->descsz == sizeof (prstatus_t))
7870 size = sizeof (prstat.pr_reg);
7871 offset = offsetof (prstatus_t, pr_reg);
7872 memcpy (&prstat, note->descdata, sizeof (prstat));
7874 /* Do not overwrite the core signal if it
7875 has already been set by another thread. */
7876 if (elf_tdata (abfd)->core_signal == 0)
7877 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7878 if (elf_tdata (abfd)->core_pid == 0)
7879 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7881 /* pr_who exists on:
7884 pr_who doesn't exist on:
7887 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7888 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7890 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7893 #if defined (HAVE_PRSTATUS32_T)
7894 else if (note->descsz == sizeof (prstatus32_t))
7896 /* 64-bit host, 32-bit corefile */
7897 prstatus32_t prstat;
7899 size = sizeof (prstat.pr_reg);
7900 offset = offsetof (prstatus32_t, pr_reg);
7901 memcpy (&prstat, note->descdata, sizeof (prstat));
7903 /* Do not overwrite the core signal if it
7904 has already been set by another thread. */
7905 if (elf_tdata (abfd)->core_signal == 0)
7906 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
7907 if (elf_tdata (abfd)->core_pid == 0)
7908 elf_tdata (abfd)->core_pid = prstat.pr_pid;
7910 /* pr_who exists on:
7913 pr_who doesn't exist on:
7916 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7917 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
7919 elf_tdata (abfd)->core_lwpid = prstat.pr_pid;
7922 #endif /* HAVE_PRSTATUS32_T */
7925 /* Fail - we don't know how to handle any other
7926 note size (ie. data object type). */
7930 /* Make a ".reg/999" section and a ".reg" section. */
7931 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
7932 size, note->descpos + offset);
7934 #endif /* defined (HAVE_PRSTATUS_T) */
7936 /* Create a pseudosection containing the exact contents of NOTE. */
7938 elfcore_make_note_pseudosection (bfd *abfd,
7940 Elf_Internal_Note *note)
7942 return _bfd_elfcore_make_pseudosection (abfd, name,
7943 note->descsz, note->descpos);
7946 /* There isn't a consistent prfpregset_t across platforms,
7947 but it doesn't matter, because we don't have to pick this
7948 data structure apart. */
7951 elfcore_grok_prfpreg (bfd *abfd, Elf_Internal_Note *note)
7953 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
7956 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7957 type of NT_PRXFPREG. Just include the whole note's contents
7961 elfcore_grok_prxfpreg (bfd *abfd, Elf_Internal_Note *note)
7963 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
7966 /* Linux dumps the Intel XSAVE extended state in a note named "LINUX"
7967 with a note type of NT_X86_XSTATE. Just include the whole note's
7968 contents literally. */
7971 elfcore_grok_xstatereg (bfd *abfd, Elf_Internal_Note *note)
7973 return elfcore_make_note_pseudosection (abfd, ".reg-xstate", note);
7977 elfcore_grok_ppc_vmx (bfd *abfd, Elf_Internal_Note *note)
7979 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vmx", note);
7983 elfcore_grok_ppc_vsx (bfd *abfd, Elf_Internal_Note *note)
7985 return elfcore_make_note_pseudosection (abfd, ".reg-ppc-vsx", note);
7989 elfcore_grok_s390_high_gprs (bfd *abfd, Elf_Internal_Note *note)
7991 return elfcore_make_note_pseudosection (abfd, ".reg-s390-high-gprs", note);
7995 elfcore_grok_s390_timer (bfd *abfd, Elf_Internal_Note *note)
7997 return elfcore_make_note_pseudosection (abfd, ".reg-s390-timer", note);
8001 elfcore_grok_s390_todcmp (bfd *abfd, Elf_Internal_Note *note)
8003 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todcmp", note);
8007 elfcore_grok_s390_todpreg (bfd *abfd, Elf_Internal_Note *note)
8009 return elfcore_make_note_pseudosection (abfd, ".reg-s390-todpreg", note);
8013 elfcore_grok_s390_ctrs (bfd *abfd, Elf_Internal_Note *note)
8015 return elfcore_make_note_pseudosection (abfd, ".reg-s390-ctrs", note);
8019 elfcore_grok_s390_prefix (bfd *abfd, Elf_Internal_Note *note)
8021 return elfcore_make_note_pseudosection (abfd, ".reg-s390-prefix", note);
8025 elfcore_grok_s390_last_break (bfd *abfd, Elf_Internal_Note *note)
8027 return elfcore_make_note_pseudosection (abfd, ".reg-s390-last-break", note);
8031 elfcore_grok_s390_system_call (bfd *abfd, Elf_Internal_Note *note)
8033 return elfcore_make_note_pseudosection (abfd, ".reg-s390-system-call", note);
8037 elfcore_grok_arm_vfp (bfd *abfd, Elf_Internal_Note *note)
8039 return elfcore_make_note_pseudosection (abfd, ".reg-arm-vfp", note);
8042 #if defined (HAVE_PRPSINFO_T)
8043 typedef prpsinfo_t elfcore_psinfo_t;
8044 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
8045 typedef prpsinfo32_t elfcore_psinfo32_t;
8049 #if defined (HAVE_PSINFO_T)
8050 typedef psinfo_t elfcore_psinfo_t;
8051 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
8052 typedef psinfo32_t elfcore_psinfo32_t;
8056 /* return a malloc'ed copy of a string at START which is at
8057 most MAX bytes long, possibly without a terminating '\0'.
8058 the copy will always have a terminating '\0'. */
8061 _bfd_elfcore_strndup (bfd *abfd, char *start, size_t max)
8064 char *end = (char *) memchr (start, '\0', max);
8072 dups = (char *) bfd_alloc (abfd, len + 1);
8076 memcpy (dups, start, len);
8082 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8084 elfcore_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
8086 if (note->descsz == sizeof (elfcore_psinfo_t))
8088 elfcore_psinfo_t psinfo;
8090 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8092 #if defined (HAVE_PSINFO_T_PR_PID) || defined (HAVE_PRPSINFO_T_PR_PID)
8093 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8095 elf_tdata (abfd)->core_program
8096 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8097 sizeof (psinfo.pr_fname));
8099 elf_tdata (abfd)->core_command
8100 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8101 sizeof (psinfo.pr_psargs));
8103 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8104 else if (note->descsz == sizeof (elfcore_psinfo32_t))
8106 /* 64-bit host, 32-bit corefile */
8107 elfcore_psinfo32_t psinfo;
8109 memcpy (&psinfo, note->descdata, sizeof (psinfo));
8111 #if defined (HAVE_PSINFO32_T_PR_PID) || defined (HAVE_PRPSINFO32_T_PR_PID)
8112 elf_tdata (abfd)->core_pid = psinfo.pr_pid;
8114 elf_tdata (abfd)->core_program
8115 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
8116 sizeof (psinfo.pr_fname));
8118 elf_tdata (abfd)->core_command
8119 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
8120 sizeof (psinfo.pr_psargs));
8126 /* Fail - we don't know how to handle any other
8127 note size (ie. data object type). */
8131 /* Note that for some reason, a spurious space is tacked
8132 onto the end of the args in some (at least one anyway)
8133 implementations, so strip it off if it exists. */
8136 char *command = elf_tdata (abfd)->core_command;
8137 int n = strlen (command);
8139 if (0 < n && command[n - 1] == ' ')
8140 command[n - 1] = '\0';
8145 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
8147 #if defined (HAVE_PSTATUS_T)
8149 elfcore_grok_pstatus (bfd *abfd, Elf_Internal_Note *note)
8151 if (note->descsz == sizeof (pstatus_t)
8152 #if defined (HAVE_PXSTATUS_T)
8153 || note->descsz == sizeof (pxstatus_t)
8159 memcpy (&pstat, note->descdata, sizeof (pstat));
8161 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8163 #if defined (HAVE_PSTATUS32_T)
8164 else if (note->descsz == sizeof (pstatus32_t))
8166 /* 64-bit host, 32-bit corefile */
8169 memcpy (&pstat, note->descdata, sizeof (pstat));
8171 elf_tdata (abfd)->core_pid = pstat.pr_pid;
8174 /* Could grab some more details from the "representative"
8175 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
8176 NT_LWPSTATUS note, presumably. */
8180 #endif /* defined (HAVE_PSTATUS_T) */
8182 #if defined (HAVE_LWPSTATUS_T)
8184 elfcore_grok_lwpstatus (bfd *abfd, Elf_Internal_Note *note)
8186 lwpstatus_t lwpstat;
8192 if (note->descsz != sizeof (lwpstat)
8193 #if defined (HAVE_LWPXSTATUS_T)
8194 && note->descsz != sizeof (lwpxstatus_t)
8199 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
8201 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
8202 /* Do not overwrite the core signal if it has already been set by
8204 if (elf_tdata (abfd)->core_signal == 0)
8205 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
8207 /* Make a ".reg/999" section. */
8209 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
8210 len = strlen (buf) + 1;
8211 name = bfd_alloc (abfd, len);
8214 memcpy (name, buf, len);
8216 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8220 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8221 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
8222 sect->filepos = note->descpos
8223 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
8226 #if defined (HAVE_LWPSTATUS_T_PR_REG)
8227 sect->size = sizeof (lwpstat.pr_reg);
8228 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
8231 sect->alignment_power = 2;
8233 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
8236 /* Make a ".reg2/999" section */
8238 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
8239 len = strlen (buf) + 1;
8240 name = bfd_alloc (abfd, len);
8243 memcpy (name, buf, len);
8245 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8249 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
8250 sect->size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
8251 sect->filepos = note->descpos
8252 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
8255 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
8256 sect->size = sizeof (lwpstat.pr_fpreg);
8257 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
8260 sect->alignment_power = 2;
8262 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
8264 #endif /* defined (HAVE_LWPSTATUS_T) */
8267 elfcore_grok_win32pstatus (bfd *abfd, Elf_Internal_Note *note)
8274 int is_active_thread;
8277 if (note->descsz < 728)
8280 if (! CONST_STRNEQ (note->namedata, "win32"))
8283 type = bfd_get_32 (abfd, note->descdata);
8287 case 1 /* NOTE_INFO_PROCESS */:
8288 /* FIXME: need to add ->core_command. */
8289 /* process_info.pid */
8290 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 8);
8291 /* process_info.signal */
8292 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 12);
8295 case 2 /* NOTE_INFO_THREAD */:
8296 /* Make a ".reg/999" section. */
8297 /* thread_info.tid */
8298 sprintf (buf, ".reg/%ld", (long) bfd_get_32 (abfd, note->descdata + 8));
8300 len = strlen (buf) + 1;
8301 name = (char *) bfd_alloc (abfd, len);
8305 memcpy (name, buf, len);
8307 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8311 /* sizeof (thread_info.thread_context) */
8313 /* offsetof (thread_info.thread_context) */
8314 sect->filepos = note->descpos + 12;
8315 sect->alignment_power = 2;
8317 /* thread_info.is_active_thread */
8318 is_active_thread = bfd_get_32 (abfd, note->descdata + 8);
8320 if (is_active_thread)
8321 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
8325 case 3 /* NOTE_INFO_MODULE */:
8326 /* Make a ".module/xxxxxxxx" section. */
8327 /* module_info.base_address */
8328 base_addr = bfd_get_32 (abfd, note->descdata + 4);
8329 sprintf (buf, ".module/%08lx", (unsigned long) base_addr);
8331 len = strlen (buf) + 1;
8332 name = (char *) bfd_alloc (abfd, len);
8336 memcpy (name, buf, len);
8338 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8343 sect->size = note->descsz;
8344 sect->filepos = note->descpos;
8345 sect->alignment_power = 2;
8356 elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
8358 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8366 if (bed->elf_backend_grok_prstatus)
8367 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
8369 #if defined (HAVE_PRSTATUS_T)
8370 return elfcore_grok_prstatus (abfd, note);
8375 #if defined (HAVE_PSTATUS_T)
8377 return elfcore_grok_pstatus (abfd, note);
8380 #if defined (HAVE_LWPSTATUS_T)
8382 return elfcore_grok_lwpstatus (abfd, note);
8385 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
8386 return elfcore_grok_prfpreg (abfd, note);
8388 case NT_WIN32PSTATUS:
8389 return elfcore_grok_win32pstatus (abfd, note);
8391 case NT_PRXFPREG: /* Linux SSE extension */
8392 if (note->namesz == 6
8393 && strcmp (note->namedata, "LINUX") == 0)
8394 return elfcore_grok_prxfpreg (abfd, note);
8398 case NT_X86_XSTATE: /* Linux XSAVE extension */
8399 if (note->namesz == 6
8400 && strcmp (note->namedata, "LINUX") == 0)
8401 return elfcore_grok_xstatereg (abfd, note);
8406 if (note->namesz == 6
8407 && strcmp (note->namedata, "LINUX") == 0)
8408 return elfcore_grok_ppc_vmx (abfd, note);
8413 if (note->namesz == 6
8414 && strcmp (note->namedata, "LINUX") == 0)
8415 return elfcore_grok_ppc_vsx (abfd, note);
8419 case NT_S390_HIGH_GPRS:
8420 if (note->namesz == 6
8421 && strcmp (note->namedata, "LINUX") == 0)
8422 return elfcore_grok_s390_high_gprs (abfd, note);
8427 if (note->namesz == 6
8428 && strcmp (note->namedata, "LINUX") == 0)
8429 return elfcore_grok_s390_timer (abfd, note);
8433 case NT_S390_TODCMP:
8434 if (note->namesz == 6
8435 && strcmp (note->namedata, "LINUX") == 0)
8436 return elfcore_grok_s390_todcmp (abfd, note);
8440 case NT_S390_TODPREG:
8441 if (note->namesz == 6
8442 && strcmp (note->namedata, "LINUX") == 0)
8443 return elfcore_grok_s390_todpreg (abfd, note);
8448 if (note->namesz == 6
8449 && strcmp (note->namedata, "LINUX") == 0)
8450 return elfcore_grok_s390_ctrs (abfd, note);
8454 case NT_S390_PREFIX:
8455 if (note->namesz == 6
8456 && strcmp (note->namedata, "LINUX") == 0)
8457 return elfcore_grok_s390_prefix (abfd, note);
8461 case NT_S390_LAST_BREAK:
8462 if (note->namesz == 6
8463 && strcmp (note->namedata, "LINUX") == 0)
8464 return elfcore_grok_s390_last_break (abfd, note);
8468 case NT_S390_SYSTEM_CALL:
8469 if (note->namesz == 6
8470 && strcmp (note->namedata, "LINUX") == 0)
8471 return elfcore_grok_s390_system_call (abfd, note);
8476 if (note->namesz == 6
8477 && strcmp (note->namedata, "LINUX") == 0)
8478 return elfcore_grok_arm_vfp (abfd, note);
8484 if (bed->elf_backend_grok_psinfo)
8485 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
8487 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8488 return elfcore_grok_psinfo (abfd, note);
8495 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8500 sect->size = note->descsz;
8501 sect->filepos = note->descpos;
8502 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8510 elfobj_grok_gnu_build_id (bfd *abfd, Elf_Internal_Note *note)
8512 elf_tdata (abfd)->build_id_size = note->descsz;
8513 elf_tdata (abfd)->build_id = (bfd_byte *) bfd_alloc (abfd, note->descsz);
8514 if (elf_tdata (abfd)->build_id == NULL)
8517 memcpy (elf_tdata (abfd)->build_id, note->descdata, note->descsz);
8523 elfobj_grok_gnu_note (bfd *abfd, Elf_Internal_Note *note)
8530 case NT_GNU_BUILD_ID:
8531 return elfobj_grok_gnu_build_id (abfd, note);
8536 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
8538 struct sdt_note *cur =
8539 (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
8542 cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
8543 cur->size = (bfd_size_type) note->descsz;
8544 memcpy (cur->data, note->descdata, note->descsz);
8546 elf_tdata (abfd)->sdt_note_head = cur;
8552 elfobj_grok_stapsdt_note (bfd *abfd, Elf_Internal_Note *note)
8557 return elfobj_grok_stapsdt_note_1 (abfd, note);
8565 elfcore_netbsd_get_lwpid (Elf_Internal_Note *note, int *lwpidp)
8569 cp = strchr (note->namedata, '@');
8572 *lwpidp = atoi(cp + 1);
8579 elfcore_grok_netbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8581 /* Signal number at offset 0x08. */
8582 elf_tdata (abfd)->core_signal
8583 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8585 /* Process ID at offset 0x50. */
8586 elf_tdata (abfd)->core_pid
8587 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
8589 /* Command name at 0x7c (max 32 bytes, including nul). */
8590 elf_tdata (abfd)->core_command
8591 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
8593 return elfcore_make_note_pseudosection (abfd, ".note.netbsdcore.procinfo",
8598 elfcore_grok_netbsd_note (bfd *abfd, Elf_Internal_Note *note)
8602 if (elfcore_netbsd_get_lwpid (note, &lwp))
8603 elf_tdata (abfd)->core_lwpid = lwp;
8605 if (note->type == NT_NETBSDCORE_PROCINFO)
8607 /* NetBSD-specific core "procinfo". Note that we expect to
8608 find this note before any of the others, which is fine,
8609 since the kernel writes this note out first when it
8610 creates a core file. */
8612 return elfcore_grok_netbsd_procinfo (abfd, note);
8615 /* As of Jan 2002 there are no other machine-independent notes
8616 defined for NetBSD core files. If the note type is less
8617 than the start of the machine-dependent note types, we don't
8620 if (note->type < NT_NETBSDCORE_FIRSTMACH)
8624 switch (bfd_get_arch (abfd))
8626 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
8627 PT_GETFPREGS == mach+2. */
8629 case bfd_arch_alpha:
8630 case bfd_arch_sparc:
8633 case NT_NETBSDCORE_FIRSTMACH+0:
8634 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8636 case NT_NETBSDCORE_FIRSTMACH+2:
8637 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8643 /* On all other arch's, PT_GETREGS == mach+1 and
8644 PT_GETFPREGS == mach+3. */
8649 case NT_NETBSDCORE_FIRSTMACH+1:
8650 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8652 case NT_NETBSDCORE_FIRSTMACH+3:
8653 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8663 elfcore_grok_openbsd_procinfo (bfd *abfd, Elf_Internal_Note *note)
8665 /* Signal number at offset 0x08. */
8666 elf_tdata (abfd)->core_signal
8667 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
8669 /* Process ID at offset 0x20. */
8670 elf_tdata (abfd)->core_pid
8671 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x20);
8673 /* Command name at 0x48 (max 32 bytes, including nul). */
8674 elf_tdata (abfd)->core_command
8675 = _bfd_elfcore_strndup (abfd, note->descdata + 0x48, 31);
8681 elfcore_grok_openbsd_note (bfd *abfd, Elf_Internal_Note *note)
8683 if (note->type == NT_OPENBSD_PROCINFO)
8684 return elfcore_grok_openbsd_procinfo (abfd, note);
8686 if (note->type == NT_OPENBSD_REGS)
8687 return elfcore_make_note_pseudosection (abfd, ".reg", note);
8689 if (note->type == NT_OPENBSD_FPREGS)
8690 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
8692 if (note->type == NT_OPENBSD_XFPREGS)
8693 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
8695 if (note->type == NT_OPENBSD_AUXV)
8697 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".auxv",
8702 sect->size = note->descsz;
8703 sect->filepos = note->descpos;
8704 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8709 if (note->type == NT_OPENBSD_WCOOKIE)
8711 asection *sect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
8716 sect->size = note->descsz;
8717 sect->filepos = note->descpos;
8718 sect->alignment_power = 1 + bfd_get_arch_size (abfd) / 32;
8727 elfcore_grok_nto_status (bfd *abfd, Elf_Internal_Note *note, long *tid)
8729 void *ddata = note->descdata;
8736 /* nto_procfs_status 'pid' field is at offset 0. */
8737 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, (bfd_byte *) ddata);
8739 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
8740 *tid = bfd_get_32 (abfd, (bfd_byte *) ddata + 4);
8742 /* nto_procfs_status 'flags' field is at offset 8. */
8743 flags = bfd_get_32 (abfd, (bfd_byte *) ddata + 8);
8745 /* nto_procfs_status 'what' field is at offset 14. */
8746 if ((sig = bfd_get_16 (abfd, (bfd_byte *) ddata + 14)) > 0)
8748 elf_tdata (abfd)->core_signal = sig;
8749 elf_tdata (abfd)->core_lwpid = *tid;
8752 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
8753 do not come from signals so we make sure we set the current
8754 thread just in case. */
8755 if (flags & 0x00000080)
8756 elf_tdata (abfd)->core_lwpid = *tid;
8758 /* Make a ".qnx_core_status/%d" section. */
8759 sprintf (buf, ".qnx_core_status/%ld", *tid);
8761 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8766 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8770 sect->size = note->descsz;
8771 sect->filepos = note->descpos;
8772 sect->alignment_power = 2;
8774 return (elfcore_maybe_make_sect (abfd, ".qnx_core_status", sect));
8778 elfcore_grok_nto_regs (bfd *abfd,
8779 Elf_Internal_Note *note,
8787 /* Make a "(base)/%d" section. */
8788 sprintf (buf, "%s/%ld", base, tid);
8790 name = (char *) bfd_alloc (abfd, strlen (buf) + 1);
8795 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8799 sect->size = note->descsz;
8800 sect->filepos = note->descpos;
8801 sect->alignment_power = 2;
8803 /* This is the current thread. */
8804 if (elf_tdata (abfd)->core_lwpid == tid)
8805 return elfcore_maybe_make_sect (abfd, base, sect);
8810 #define BFD_QNT_CORE_INFO 7
8811 #define BFD_QNT_CORE_STATUS 8
8812 #define BFD_QNT_CORE_GREG 9
8813 #define BFD_QNT_CORE_FPREG 10
8816 elfcore_grok_nto_note (bfd *abfd, Elf_Internal_Note *note)
8818 /* Every GREG section has a STATUS section before it. Store the
8819 tid from the previous call to pass down to the next gregs
8821 static long tid = 1;
8825 case BFD_QNT_CORE_INFO:
8826 return elfcore_make_note_pseudosection (abfd, ".qnx_core_info", note);
8827 case BFD_QNT_CORE_STATUS:
8828 return elfcore_grok_nto_status (abfd, note, &tid);
8829 case BFD_QNT_CORE_GREG:
8830 return elfcore_grok_nto_regs (abfd, note, tid, ".reg");
8831 case BFD_QNT_CORE_FPREG:
8832 return elfcore_grok_nto_regs (abfd, note, tid, ".reg2");
8839 elfcore_grok_spu_note (bfd *abfd, Elf_Internal_Note *note)
8845 /* Use note name as section name. */
8847 name = (char *) bfd_alloc (abfd, len);
8850 memcpy (name, note->namedata, len);
8851 name[len - 1] = '\0';
8853 sect = bfd_make_section_anyway_with_flags (abfd, name, SEC_HAS_CONTENTS);
8857 sect->size = note->descsz;
8858 sect->filepos = note->descpos;
8859 sect->alignment_power = 1;
8864 /* Function: elfcore_write_note
8867 buffer to hold note, and current size of buffer
8871 size of data for note
8873 Writes note to end of buffer. ELF64 notes are written exactly as
8874 for ELF32, despite the current (as of 2006) ELF gabi specifying
8875 that they ought to have 8-byte namesz and descsz field, and have
8876 8-byte alignment. Other writers, eg. Linux kernel, do the same.
8879 Pointer to realloc'd buffer, *BUFSIZ updated. */
8882 elfcore_write_note (bfd *abfd,
8890 Elf_External_Note *xnp;
8897 namesz = strlen (name) + 1;
8899 newspace = 12 + ((namesz + 3) & -4) + ((size + 3) & -4);
8901 buf = (char *) realloc (buf, *bufsiz + newspace);
8904 dest = buf + *bufsiz;
8905 *bufsiz += newspace;
8906 xnp = (Elf_External_Note *) dest;
8907 H_PUT_32 (abfd, namesz, xnp->namesz);
8908 H_PUT_32 (abfd, size, xnp->descsz);
8909 H_PUT_32 (abfd, type, xnp->type);
8913 memcpy (dest, name, namesz);
8921 memcpy (dest, input, size);
8932 elfcore_write_prpsinfo (bfd *abfd,
8938 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8940 if (bed->elf_backend_write_core_note != NULL)
8943 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
8944 NT_PRPSINFO, fname, psargs);
8949 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
8950 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
8951 if (bed->s->elfclass == ELFCLASS32)
8953 #if defined (HAVE_PSINFO32_T)
8955 int note_type = NT_PSINFO;
8958 int note_type = NT_PRPSINFO;
8961 memset (&data, 0, sizeof (data));
8962 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8963 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8964 return elfcore_write_note (abfd, buf, bufsiz,
8965 "CORE", note_type, &data, sizeof (data));
8970 #if defined (HAVE_PSINFO_T)
8972 int note_type = NT_PSINFO;
8975 int note_type = NT_PRPSINFO;
8978 memset (&data, 0, sizeof (data));
8979 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
8980 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
8981 return elfcore_write_note (abfd, buf, bufsiz,
8982 "CORE", note_type, &data, sizeof (data));
8984 #endif /* PSINFO_T or PRPSINFO_T */
8991 elfcore_write_prstatus (bfd *abfd,
8998 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9000 if (bed->elf_backend_write_core_note != NULL)
9003 ret = (*bed->elf_backend_write_core_note) (abfd, buf, bufsiz,
9005 pid, cursig, gregs);
9010 #if defined (HAVE_PRSTATUS_T)
9011 #if defined (HAVE_PRSTATUS32_T)
9012 if (bed->s->elfclass == ELFCLASS32)
9014 prstatus32_t prstat;
9016 memset (&prstat, 0, sizeof (prstat));
9017 prstat.pr_pid = pid;
9018 prstat.pr_cursig = cursig;
9019 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9020 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9021 NT_PRSTATUS, &prstat, sizeof (prstat));
9028 memset (&prstat, 0, sizeof (prstat));
9029 prstat.pr_pid = pid;
9030 prstat.pr_cursig = cursig;
9031 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
9032 return elfcore_write_note (abfd, buf, bufsiz, "CORE",
9033 NT_PRSTATUS, &prstat, sizeof (prstat));
9035 #endif /* HAVE_PRSTATUS_T */
9041 #if defined (HAVE_LWPSTATUS_T)
9043 elfcore_write_lwpstatus (bfd *abfd,
9050 lwpstatus_t lwpstat;
9051 const char *note_name = "CORE";
9053 memset (&lwpstat, 0, sizeof (lwpstat));
9054 lwpstat.pr_lwpid = pid >> 16;
9055 lwpstat.pr_cursig = cursig;
9056 #if defined (HAVE_LWPSTATUS_T_PR_REG)
9057 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
9058 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
9060 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
9061 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
9063 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
9064 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
9067 return elfcore_write_note (abfd, buf, bufsiz, note_name,
9068 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
9070 #endif /* HAVE_LWPSTATUS_T */
9072 #if defined (HAVE_PSTATUS_T)
9074 elfcore_write_pstatus (bfd *abfd,
9078 int cursig ATTRIBUTE_UNUSED,
9079 const void *gregs ATTRIBUTE_UNUSED)
9081 const char *note_name = "CORE";
9082 #if defined (HAVE_PSTATUS32_T)
9083 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9085 if (bed->s->elfclass == ELFCLASS32)
9089 memset (&pstat, 0, sizeof (pstat));
9090 pstat.pr_pid = pid & 0xffff;
9091 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9092 NT_PSTATUS, &pstat, sizeof (pstat));
9100 memset (&pstat, 0, sizeof (pstat));
9101 pstat.pr_pid = pid & 0xffff;
9102 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
9103 NT_PSTATUS, &pstat, sizeof (pstat));
9107 #endif /* HAVE_PSTATUS_T */
9110 elfcore_write_prfpreg (bfd *abfd,
9116 const char *note_name = "CORE";
9117 return elfcore_write_note (abfd, buf, bufsiz,
9118 note_name, NT_FPREGSET, fpregs, size);
9122 elfcore_write_prxfpreg (bfd *abfd,
9125 const void *xfpregs,
9128 char *note_name = "LINUX";
9129 return elfcore_write_note (abfd, buf, bufsiz,
9130 note_name, NT_PRXFPREG, xfpregs, size);
9134 elfcore_write_xstatereg (bfd *abfd, char *buf, int *bufsiz,
9135 const void *xfpregs, int size)
9137 char *note_name = "LINUX";
9138 return elfcore_write_note (abfd, buf, bufsiz,
9139 note_name, NT_X86_XSTATE, xfpregs, size);
9143 elfcore_write_ppc_vmx (bfd *abfd,
9146 const void *ppc_vmx,
9149 char *note_name = "LINUX";
9150 return elfcore_write_note (abfd, buf, bufsiz,
9151 note_name, NT_PPC_VMX, ppc_vmx, size);
9155 elfcore_write_ppc_vsx (bfd *abfd,
9158 const void *ppc_vsx,
9161 char *note_name = "LINUX";
9162 return elfcore_write_note (abfd, buf, bufsiz,
9163 note_name, NT_PPC_VSX, ppc_vsx, size);
9167 elfcore_write_s390_high_gprs (bfd *abfd,
9170 const void *s390_high_gprs,
9173 char *note_name = "LINUX";
9174 return elfcore_write_note (abfd, buf, bufsiz,
9175 note_name, NT_S390_HIGH_GPRS,
9176 s390_high_gprs, size);
9180 elfcore_write_s390_timer (bfd *abfd,
9183 const void *s390_timer,
9186 char *note_name = "LINUX";
9187 return elfcore_write_note (abfd, buf, bufsiz,
9188 note_name, NT_S390_TIMER, s390_timer, size);
9192 elfcore_write_s390_todcmp (bfd *abfd,
9195 const void *s390_todcmp,
9198 char *note_name = "LINUX";
9199 return elfcore_write_note (abfd, buf, bufsiz,
9200 note_name, NT_S390_TODCMP, s390_todcmp, size);
9204 elfcore_write_s390_todpreg (bfd *abfd,
9207 const void *s390_todpreg,
9210 char *note_name = "LINUX";
9211 return elfcore_write_note (abfd, buf, bufsiz,
9212 note_name, NT_S390_TODPREG, s390_todpreg, size);
9216 elfcore_write_s390_ctrs (bfd *abfd,
9219 const void *s390_ctrs,
9222 char *note_name = "LINUX";
9223 return elfcore_write_note (abfd, buf, bufsiz,
9224 note_name, NT_S390_CTRS, s390_ctrs, size);
9228 elfcore_write_s390_prefix (bfd *abfd,
9231 const void *s390_prefix,
9234 char *note_name = "LINUX";
9235 return elfcore_write_note (abfd, buf, bufsiz,
9236 note_name, NT_S390_PREFIX, s390_prefix, size);
9240 elfcore_write_s390_last_break (bfd *abfd,
9243 const void *s390_last_break,
9246 char *note_name = "LINUX";
9247 return elfcore_write_note (abfd, buf, bufsiz,
9248 note_name, NT_S390_LAST_BREAK,
9249 s390_last_break, size);
9253 elfcore_write_s390_system_call (bfd *abfd,
9256 const void *s390_system_call,
9259 char *note_name = "LINUX";
9260 return elfcore_write_note (abfd, buf, bufsiz,
9261 note_name, NT_S390_SYSTEM_CALL,
9262 s390_system_call, size);
9266 elfcore_write_arm_vfp (bfd *abfd,
9269 const void *arm_vfp,
9272 char *note_name = "LINUX";
9273 return elfcore_write_note (abfd, buf, bufsiz,
9274 note_name, NT_ARM_VFP, arm_vfp, size);
9278 elfcore_write_register_note (bfd *abfd,
9281 const char *section,
9285 if (strcmp (section, ".reg2") == 0)
9286 return elfcore_write_prfpreg (abfd, buf, bufsiz, data, size);
9287 if (strcmp (section, ".reg-xfp") == 0)
9288 return elfcore_write_prxfpreg (abfd, buf, bufsiz, data, size);
9289 if (strcmp (section, ".reg-xstate") == 0)
9290 return elfcore_write_xstatereg (abfd, buf, bufsiz, data, size);
9291 if (strcmp (section, ".reg-ppc-vmx") == 0)
9292 return elfcore_write_ppc_vmx (abfd, buf, bufsiz, data, size);
9293 if (strcmp (section, ".reg-ppc-vsx") == 0)
9294 return elfcore_write_ppc_vsx (abfd, buf, bufsiz, data, size);
9295 if (strcmp (section, ".reg-s390-high-gprs") == 0)
9296 return elfcore_write_s390_high_gprs (abfd, buf, bufsiz, data, size);
9297 if (strcmp (section, ".reg-s390-timer") == 0)
9298 return elfcore_write_s390_timer (abfd, buf, bufsiz, data, size);
9299 if (strcmp (section, ".reg-s390-todcmp") == 0)
9300 return elfcore_write_s390_todcmp (abfd, buf, bufsiz, data, size);
9301 if (strcmp (section, ".reg-s390-todpreg") == 0)
9302 return elfcore_write_s390_todpreg (abfd, buf, bufsiz, data, size);
9303 if (strcmp (section, ".reg-s390-ctrs") == 0)
9304 return elfcore_write_s390_ctrs (abfd, buf, bufsiz, data, size);
9305 if (strcmp (section, ".reg-s390-prefix") == 0)
9306 return elfcore_write_s390_prefix (abfd, buf, bufsiz, data, size);
9307 if (strcmp (section, ".reg-s390-last-break") == 0)
9308 return elfcore_write_s390_last_break (abfd, buf, bufsiz, data, size);
9309 if (strcmp (section, ".reg-s390-system-call") == 0)
9310 return elfcore_write_s390_system_call (abfd, buf, bufsiz, data, size);
9311 if (strcmp (section, ".reg-arm-vfp") == 0)
9312 return elfcore_write_arm_vfp (abfd, buf, bufsiz, data, size);
9317 elf_parse_notes (bfd *abfd, char *buf, size_t size, file_ptr offset)
9322 while (p < buf + size)
9324 /* FIXME: bad alignment assumption. */
9325 Elf_External_Note *xnp = (Elf_External_Note *) p;
9326 Elf_Internal_Note in;
9328 if (offsetof (Elf_External_Note, name) > buf - p + size)
9331 in.type = H_GET_32 (abfd, xnp->type);
9333 in.namesz = H_GET_32 (abfd, xnp->namesz);
9334 in.namedata = xnp->name;
9335 if (in.namesz > buf - in.namedata + size)
9338 in.descsz = H_GET_32 (abfd, xnp->descsz);
9339 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
9340 in.descpos = offset + (in.descdata - buf);
9342 && (in.descdata >= buf + size
9343 || in.descsz > buf - in.descdata + size))
9346 switch (bfd_get_format (abfd))
9352 if (CONST_STRNEQ (in.namedata, "NetBSD-CORE"))
9354 if (! elfcore_grok_netbsd_note (abfd, &in))
9357 else if (CONST_STRNEQ (in.namedata, "OpenBSD"))
9359 if (! elfcore_grok_openbsd_note (abfd, &in))
9362 else if (CONST_STRNEQ (in.namedata, "QNX"))
9364 if (! elfcore_grok_nto_note (abfd, &in))
9367 else if (CONST_STRNEQ (in.namedata, "SPU/"))
9369 if (! elfcore_grok_spu_note (abfd, &in))
9374 if (! elfcore_grok_note (abfd, &in))
9380 if (in.namesz == sizeof "GNU" && strcmp (in.namedata, "GNU") == 0)
9382 if (! elfobj_grok_gnu_note (abfd, &in))
9385 else if (in.namesz == sizeof "stapsdt"
9386 && strcmp (in.namedata, "stapsdt") == 0)
9388 if (! elfobj_grok_stapsdt_note (abfd, &in))
9394 p = in.descdata + BFD_ALIGN (in.descsz, 4);
9401 elf_read_notes (bfd *abfd, file_ptr offset, bfd_size_type size)
9408 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
9411 buf = (char *) bfd_malloc (size);
9415 if (bfd_bread (buf, size, abfd) != size
9416 || !elf_parse_notes (abfd, buf, size, offset))
9426 /* Providing external access to the ELF program header table. */
9428 /* Return an upper bound on the number of bytes required to store a
9429 copy of ABFD's program header table entries. Return -1 if an error
9430 occurs; bfd_get_error will return an appropriate code. */
9433 bfd_get_elf_phdr_upper_bound (bfd *abfd)
9435 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9437 bfd_set_error (bfd_error_wrong_format);
9441 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
9444 /* Copy ABFD's program header table entries to *PHDRS. The entries
9445 will be stored as an array of Elf_Internal_Phdr structures, as
9446 defined in include/elf/internal.h. To find out how large the
9447 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
9449 Return the number of program header table entries read, or -1 if an
9450 error occurs; bfd_get_error will return an appropriate code. */
9453 bfd_get_elf_phdrs (bfd *abfd, void *phdrs)
9457 if (abfd->xvec->flavour != bfd_target_elf_flavour)
9459 bfd_set_error (bfd_error_wrong_format);
9463 num_phdrs = elf_elfheader (abfd)->e_phnum;
9464 memcpy (phdrs, elf_tdata (abfd)->phdr,
9465 num_phdrs * sizeof (Elf_Internal_Phdr));
9470 enum elf_reloc_type_class
9471 _bfd_elf_reloc_type_class (const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED)
9473 return reloc_class_normal;
9476 /* For RELA architectures, return the relocation value for a
9477 relocation against a local symbol. */
9480 _bfd_elf_rela_local_sym (bfd *abfd,
9481 Elf_Internal_Sym *sym,
9483 Elf_Internal_Rela *rel)
9485 asection *sec = *psec;
9488 relocation = (sec->output_section->vma
9489 + sec->output_offset
9491 if ((sec->flags & SEC_MERGE)
9492 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
9493 && sec->sec_info_type == SEC_INFO_TYPE_MERGE)
9496 _bfd_merged_section_offset (abfd, psec,
9497 elf_section_data (sec)->sec_info,
9498 sym->st_value + rel->r_addend);
9501 /* If we have changed the section, and our original section is
9502 marked with SEC_EXCLUDE, it means that the original
9503 SEC_MERGE section has been completely subsumed in some
9504 other SEC_MERGE section. In this case, we need to leave
9505 some info around for --emit-relocs. */
9506 if ((sec->flags & SEC_EXCLUDE) != 0)
9507 sec->kept_section = *psec;
9510 rel->r_addend -= relocation;
9511 rel->r_addend += sec->output_section->vma + sec->output_offset;
9517 _bfd_elf_rel_local_sym (bfd *abfd,
9518 Elf_Internal_Sym *sym,
9522 asection *sec = *psec;
9524 if (sec->sec_info_type != SEC_INFO_TYPE_MERGE)
9525 return sym->st_value + addend;
9527 return _bfd_merged_section_offset (abfd, psec,
9528 elf_section_data (sec)->sec_info,
9529 sym->st_value + addend);
9533 _bfd_elf_section_offset (bfd *abfd,
9534 struct bfd_link_info *info,
9538 switch (sec->sec_info_type)
9540 case SEC_INFO_TYPE_STABS:
9541 return _bfd_stab_section_offset (sec, elf_section_data (sec)->sec_info,
9543 case SEC_INFO_TYPE_EH_FRAME:
9544 return _bfd_elf_eh_frame_section_offset (abfd, info, sec, offset);
9546 if ((sec->flags & SEC_ELF_REVERSE_COPY) != 0)
9548 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9549 bfd_size_type address_size = bed->s->arch_size / 8;
9550 offset = sec->size - offset - address_size;
9556 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
9557 reconstruct an ELF file by reading the segments out of remote memory
9558 based on the ELF file header at EHDR_VMA and the ELF program headers it
9559 points to. If not null, *LOADBASEP is filled in with the difference
9560 between the VMAs from which the segments were read, and the VMAs the
9561 file headers (and hence BFD's idea of each section's VMA) put them at.
9563 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
9564 remote memory at target address VMA into the local buffer at MYADDR; it
9565 should return zero on success or an `errno' code on failure. TEMPL must
9566 be a BFD for an ELF target with the word size and byte order found in
9567 the remote memory. */
9570 bfd_elf_bfd_from_remote_memory
9574 int (*target_read_memory) (bfd_vma, bfd_byte *, size_t))
9576 return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
9577 (templ, ehdr_vma, loadbasep, target_read_memory);
9581 _bfd_elf_get_synthetic_symtab (bfd *abfd,
9582 long symcount ATTRIBUTE_UNUSED,
9583 asymbol **syms ATTRIBUTE_UNUSED,
9588 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
9591 const char *relplt_name;
9592 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
9596 Elf_Internal_Shdr *hdr;
9602 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
9605 if (dynsymcount <= 0)
9608 if (!bed->plt_sym_val)
9611 relplt_name = bed->relplt_name;
9612 if (relplt_name == NULL)
9613 relplt_name = bed->rela_plts_and_copies_p ? ".rela.plt" : ".rel.plt";
9614 relplt = bfd_get_section_by_name (abfd, relplt_name);
9618 hdr = &elf_section_data (relplt)->this_hdr;
9619 if (hdr->sh_link != elf_dynsymtab (abfd)
9620 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
9623 plt = bfd_get_section_by_name (abfd, ".plt");
9627 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
9628 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
9631 count = relplt->size / hdr->sh_entsize;
9632 size = count * sizeof (asymbol);
9633 p = relplt->relocation;
9634 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9636 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
9640 size += sizeof ("+0x") - 1 + 8 + 8 * (bed->s->elfclass == ELFCLASS64);
9642 size += sizeof ("+0x") - 1 + 8;
9647 s = *ret = (asymbol *) bfd_malloc (size);
9651 names = (char *) (s + count);
9652 p = relplt->relocation;
9654 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
9659 addr = bed->plt_sym_val (i, plt, p);
9660 if (addr == (bfd_vma) -1)
9663 *s = **p->sym_ptr_ptr;
9664 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
9665 we are defining a symbol, ensure one of them is set. */
9666 if ((s->flags & BSF_LOCAL) == 0)
9667 s->flags |= BSF_GLOBAL;
9668 s->flags |= BSF_SYNTHETIC;
9670 s->value = addr - plt->vma;
9673 len = strlen ((*p->sym_ptr_ptr)->name);
9674 memcpy (names, (*p->sym_ptr_ptr)->name, len);
9680 memcpy (names, "+0x", sizeof ("+0x") - 1);
9681 names += sizeof ("+0x") - 1;
9682 bfd_sprintf_vma (abfd, buf, p->addend);
9683 for (a = buf; *a == '0'; ++a)
9686 memcpy (names, a, len);
9689 memcpy (names, "@plt", sizeof ("@plt"));
9690 names += sizeof ("@plt");
9697 /* It is only used by x86-64 so far. */
9698 asection _bfd_elf_large_com_section
9699 = BFD_FAKE_SECTION (_bfd_elf_large_com_section,
9700 SEC_IS_COMMON, NULL, "LARGE_COMMON", 0);
9703 _bfd_elf_set_osabi (bfd * abfd,
9704 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
9706 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
9708 i_ehdrp = elf_elfheader (abfd);
9710 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
9712 /* To make things simpler for the loader on Linux systems we set the
9713 osabi field to ELFOSABI_GNU if the binary contains symbols of
9714 the STT_GNU_IFUNC type or STB_GNU_UNIQUE binding. */
9715 if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE
9716 && elf_tdata (abfd)->has_gnu_symbols)
9717 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_GNU;
9721 /* Return TRUE for ELF symbol types that represent functions.
9722 This is the default version of this function, which is sufficient for
9723 most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */
9726 _bfd_elf_is_function_type (unsigned int type)
9728 return (type == STT_FUNC
9729 || type == STT_GNU_IFUNC);
9732 /* If the ELF symbol SYM might be a function in SEC, return the
9733 function size and set *CODE_OFF to the function's entry point,
9734 otherwise return zero. */
9737 _bfd_elf_maybe_function_sym (const asymbol *sym, asection *sec,
9742 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
9743 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
9744 || sym->section != sec)
9747 *code_off = sym->value;
9749 if (!(sym->flags & BSF_SYNTHETIC))
9750 size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;