1 /* ELF executable support for BFD.
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 BFD support for ELF formats is being worked on.
26 Currently, the best supported back ends are for sparc and i386
27 (running svr4 or Solaris 2).
29 Documentation of the internals of the support code still needs
30 to be written. The code is changing quickly enough that we
31 haven't bothered yet. */
33 /* For sparc64-cross-sparc32. */
41 #include "libiberty.h"
43 static INLINE struct elf_segment_map *make_mapping
44 PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
45 static boolean map_sections_to_segments PARAMS ((bfd *));
46 static int elf_sort_sections PARAMS ((const PTR, const PTR));
47 static boolean assign_file_positions_for_segments PARAMS ((bfd *));
48 static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
49 static boolean prep_headers PARAMS ((bfd *));
50 static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int));
51 static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
52 static char *elf_read PARAMS ((bfd *, file_ptr, bfd_size_type));
53 static const char *group_signature PARAMS ((bfd *, Elf_Internal_Shdr *));
54 static boolean setup_group PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
55 static void merge_sections_remove_hook PARAMS ((bfd *, asection *));
56 static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
57 static boolean assign_section_numbers PARAMS ((bfd *));
58 static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
59 static boolean elf_map_symbols PARAMS ((bfd *));
60 static bfd_size_type get_program_header_size PARAMS ((bfd *));
61 static boolean elfcore_read_notes PARAMS ((bfd *, file_ptr, bfd_size_type));
62 static boolean elf_find_function PARAMS ((bfd *, asection *, asymbol **,
63 bfd_vma, const char **,
65 static int elfcore_make_pid PARAMS ((bfd *));
66 static boolean elfcore_maybe_make_sect PARAMS ((bfd *, char *, asection *));
67 static boolean elfcore_make_note_pseudosection PARAMS ((bfd *, char *,
68 Elf_Internal_Note *));
69 static boolean elfcore_grok_prfpreg PARAMS ((bfd *, Elf_Internal_Note *));
70 static boolean elfcore_grok_prxfpreg PARAMS ((bfd *, Elf_Internal_Note *));
71 static boolean elfcore_grok_note PARAMS ((bfd *, Elf_Internal_Note *));
73 static boolean elfcore_netbsd_get_lwpid PARAMS ((Elf_Internal_Note *, int *));
74 static boolean elfcore_grok_netbsd_procinfo PARAMS ((bfd *,
75 Elf_Internal_Note *));
76 static boolean elfcore_grok_netbsd_note PARAMS ((bfd *, Elf_Internal_Note *));
78 /* Swap version information in and out. The version information is
79 currently size independent. If that ever changes, this code will
80 need to move into elfcode.h. */
82 /* Swap in a Verdef structure. */
85 _bfd_elf_swap_verdef_in (abfd, src, dst)
87 const Elf_External_Verdef *src;
88 Elf_Internal_Verdef *dst;
90 dst->vd_version = H_GET_16 (abfd, src->vd_version);
91 dst->vd_flags = H_GET_16 (abfd, src->vd_flags);
92 dst->vd_ndx = H_GET_16 (abfd, src->vd_ndx);
93 dst->vd_cnt = H_GET_16 (abfd, src->vd_cnt);
94 dst->vd_hash = H_GET_32 (abfd, src->vd_hash);
95 dst->vd_aux = H_GET_32 (abfd, src->vd_aux);
96 dst->vd_next = H_GET_32 (abfd, src->vd_next);
99 /* Swap out a Verdef structure. */
102 _bfd_elf_swap_verdef_out (abfd, src, dst)
104 const Elf_Internal_Verdef *src;
105 Elf_External_Verdef *dst;
107 H_PUT_16 (abfd, src->vd_version, dst->vd_version);
108 H_PUT_16 (abfd, src->vd_flags, dst->vd_flags);
109 H_PUT_16 (abfd, src->vd_ndx, dst->vd_ndx);
110 H_PUT_16 (abfd, src->vd_cnt, dst->vd_cnt);
111 H_PUT_32 (abfd, src->vd_hash, dst->vd_hash);
112 H_PUT_32 (abfd, src->vd_aux, dst->vd_aux);
113 H_PUT_32 (abfd, src->vd_next, dst->vd_next);
116 /* Swap in a Verdaux structure. */
119 _bfd_elf_swap_verdaux_in (abfd, src, dst)
121 const Elf_External_Verdaux *src;
122 Elf_Internal_Verdaux *dst;
124 dst->vda_name = H_GET_32 (abfd, src->vda_name);
125 dst->vda_next = H_GET_32 (abfd, src->vda_next);
128 /* Swap out a Verdaux structure. */
131 _bfd_elf_swap_verdaux_out (abfd, src, dst)
133 const Elf_Internal_Verdaux *src;
134 Elf_External_Verdaux *dst;
136 H_PUT_32 (abfd, src->vda_name, dst->vda_name);
137 H_PUT_32 (abfd, src->vda_next, dst->vda_next);
140 /* Swap in a Verneed structure. */
143 _bfd_elf_swap_verneed_in (abfd, src, dst)
145 const Elf_External_Verneed *src;
146 Elf_Internal_Verneed *dst;
148 dst->vn_version = H_GET_16 (abfd, src->vn_version);
149 dst->vn_cnt = H_GET_16 (abfd, src->vn_cnt);
150 dst->vn_file = H_GET_32 (abfd, src->vn_file);
151 dst->vn_aux = H_GET_32 (abfd, src->vn_aux);
152 dst->vn_next = H_GET_32 (abfd, src->vn_next);
155 /* Swap out a Verneed structure. */
158 _bfd_elf_swap_verneed_out (abfd, src, dst)
160 const Elf_Internal_Verneed *src;
161 Elf_External_Verneed *dst;
163 H_PUT_16 (abfd, src->vn_version, dst->vn_version);
164 H_PUT_16 (abfd, src->vn_cnt, dst->vn_cnt);
165 H_PUT_32 (abfd, src->vn_file, dst->vn_file);
166 H_PUT_32 (abfd, src->vn_aux, dst->vn_aux);
167 H_PUT_32 (abfd, src->vn_next, dst->vn_next);
170 /* Swap in a Vernaux structure. */
173 _bfd_elf_swap_vernaux_in (abfd, src, dst)
175 const Elf_External_Vernaux *src;
176 Elf_Internal_Vernaux *dst;
178 dst->vna_hash = H_GET_32 (abfd, src->vna_hash);
179 dst->vna_flags = H_GET_16 (abfd, src->vna_flags);
180 dst->vna_other = H_GET_16 (abfd, src->vna_other);
181 dst->vna_name = H_GET_32 (abfd, src->vna_name);
182 dst->vna_next = H_GET_32 (abfd, src->vna_next);
185 /* Swap out a Vernaux structure. */
188 _bfd_elf_swap_vernaux_out (abfd, src, dst)
190 const Elf_Internal_Vernaux *src;
191 Elf_External_Vernaux *dst;
193 H_PUT_32 (abfd, src->vna_hash, dst->vna_hash);
194 H_PUT_16 (abfd, src->vna_flags, dst->vna_flags);
195 H_PUT_16 (abfd, src->vna_other, dst->vna_other);
196 H_PUT_32 (abfd, src->vna_name, dst->vna_name);
197 H_PUT_32 (abfd, src->vna_next, dst->vna_next);
200 /* Swap in a Versym structure. */
203 _bfd_elf_swap_versym_in (abfd, src, dst)
205 const Elf_External_Versym *src;
206 Elf_Internal_Versym *dst;
208 dst->vs_vers = H_GET_16 (abfd, src->vs_vers);
211 /* Swap out a Versym structure. */
214 _bfd_elf_swap_versym_out (abfd, src, dst)
216 const Elf_Internal_Versym *src;
217 Elf_External_Versym *dst;
219 H_PUT_16 (abfd, src->vs_vers, dst->vs_vers);
222 /* Standard ELF hash function. Do not change this function; you will
223 cause invalid hash tables to be generated. */
226 bfd_elf_hash (namearg)
229 const unsigned char *name = (const unsigned char *) namearg;
234 while ((ch = *name++) != '\0')
237 if ((g = (h & 0xf0000000)) != 0)
240 /* The ELF ABI says `h &= ~g', but this is equivalent in
241 this case and on some machines one insn instead of two. */
248 /* Read a specified number of bytes at a specified offset in an ELF
249 file, into a newly allocated buffer, and return a pointer to the
253 elf_read (abfd, offset, size)
260 if ((buf = bfd_alloc (abfd, size)) == NULL)
262 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
264 if (bfd_bread ((PTR) buf, size, abfd) != size)
266 if (bfd_get_error () != bfd_error_system_call)
267 bfd_set_error (bfd_error_file_truncated);
274 bfd_elf_mkobject (abfd)
277 /* This just does initialization. */
278 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
279 bfd_size_type amt = sizeof (struct elf_obj_tdata);
280 elf_tdata (abfd) = (struct elf_obj_tdata *) bfd_zalloc (abfd, amt);
281 if (elf_tdata (abfd) == 0)
283 /* Since everything is done at close time, do we need any
290 bfd_elf_mkcorefile (abfd)
293 /* I think this can be done just like an object file. */
294 return bfd_elf_mkobject (abfd);
298 bfd_elf_get_str_section (abfd, shindex)
300 unsigned int shindex;
302 Elf_Internal_Shdr **i_shdrp;
303 char *shstrtab = NULL;
305 bfd_size_type shstrtabsize;
307 i_shdrp = elf_elfsections (abfd);
308 if (i_shdrp == 0 || i_shdrp[shindex] == 0)
311 shstrtab = (char *) i_shdrp[shindex]->contents;
312 if (shstrtab == NULL)
314 /* No cached one, attempt to read, and cache what we read. */
315 offset = i_shdrp[shindex]->sh_offset;
316 shstrtabsize = i_shdrp[shindex]->sh_size;
317 shstrtab = elf_read (abfd, offset, shstrtabsize);
318 i_shdrp[shindex]->contents = (PTR) shstrtab;
324 bfd_elf_string_from_elf_section (abfd, shindex, strindex)
326 unsigned int shindex;
327 unsigned int strindex;
329 Elf_Internal_Shdr *hdr;
334 hdr = elf_elfsections (abfd)[shindex];
336 if (hdr->contents == NULL
337 && bfd_elf_get_str_section (abfd, shindex) == NULL)
340 if (strindex >= hdr->sh_size)
342 (*_bfd_error_handler)
343 (_("%s: invalid string offset %u >= %lu for section `%s'"),
344 bfd_archive_filename (abfd), strindex, (unsigned long) hdr->sh_size,
345 ((shindex == elf_elfheader(abfd)->e_shstrndx
346 && strindex == hdr->sh_name)
348 : elf_string_from_elf_strtab (abfd, hdr->sh_name)));
352 return ((char *) hdr->contents) + strindex;
355 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
356 sections. The first element is the flags, the rest are section
359 typedef union elf_internal_group {
360 Elf_Internal_Shdr *shdr;
362 } Elf_Internal_Group;
364 /* Return the name of the group signature symbol. Why isn't the
365 signature just a string? */
368 group_signature (abfd, ghdr)
370 Elf_Internal_Shdr *ghdr;
372 struct elf_backend_data *bed;
375 Elf_Internal_Shdr *hdr;
376 Elf_Internal_Shdr *shndx_hdr;
377 unsigned char esym[sizeof (Elf64_External_Sym)];
378 Elf_External_Sym_Shndx eshndx;
379 Elf_Internal_Sym isym;
381 unsigned int shindex;
383 /* First we need to ensure the symbol table is available. */
384 if (! bfd_section_from_shdr (abfd, ghdr->sh_link))
387 /* Go read the symbol. */
388 hdr = &elf_tdata (abfd)->symtab_hdr;
389 bed = get_elf_backend_data (abfd);
390 amt = bed->s->sizeof_sym;
391 pos = hdr->sh_offset + ghdr->sh_info * amt;
392 if (bfd_seek (abfd, pos, SEEK_SET) != 0
393 || bfd_bread (esym, amt, abfd) != amt)
396 /* And possibly the symbol section index extension. */
397 shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
398 if (elf_elfsections (abfd) != NULL
399 && elf_elfsections (abfd)[shndx_hdr->sh_link] == hdr)
401 amt = sizeof (Elf_External_Sym_Shndx);
402 pos = shndx_hdr->sh_offset + ghdr->sh_info * amt;
403 if (bfd_seek (abfd, pos, SEEK_SET) != 0
404 || bfd_bread ((PTR) &eshndx, amt, abfd) != amt)
408 /* Convert to internal format. */
409 (*bed->s->swap_symbol_in) (abfd, (const PTR *) &esym, (const PTR *) &eshndx,
412 /* Look up the symbol name. */
413 iname = isym.st_name;
414 shindex = hdr->sh_link;
415 if (iname == 0 && ELF_ST_TYPE (isym.st_info) == STT_SECTION)
417 iname = elf_elfsections (abfd)[isym.st_shndx]->sh_name;
418 shindex = elf_elfheader (abfd)->e_shstrndx;
421 return bfd_elf_string_from_elf_section (abfd, shindex, iname);
424 /* Set next_in_group list pointer, and group name for NEWSECT. */
427 setup_group (abfd, hdr, newsect)
429 Elf_Internal_Shdr *hdr;
432 unsigned int num_group = elf_tdata (abfd)->num_group;
434 /* If num_group is zero, read in all SHT_GROUP sections. The count
435 is set to -1 if there are no SHT_GROUP sections. */
438 unsigned int i, shnum;
440 /* First count the number of groups. If we have a SHT_GROUP
441 section with just a flag word (ie. sh_size is 4), ignore it. */
442 shnum = elf_numsections (abfd);
444 for (i = 0; i < shnum; i++)
446 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
447 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
452 num_group = (unsigned) -1;
453 elf_tdata (abfd)->num_group = num_group;
457 /* We keep a list of elf section headers for group sections,
458 so we can find them quickly. */
459 bfd_size_type amt = num_group * sizeof (Elf_Internal_Shdr *);
460 elf_tdata (abfd)->group_sect_ptr = bfd_alloc (abfd, amt);
461 if (elf_tdata (abfd)->group_sect_ptr == NULL)
465 for (i = 0; i < shnum; i++)
467 Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[i];
468 if (shdr->sh_type == SHT_GROUP && shdr->sh_size >= 8)
471 Elf_Internal_Group *dest;
473 /* Add to list of sections. */
474 elf_tdata (abfd)->group_sect_ptr[num_group] = shdr;
477 /* Read the raw contents. */
478 BFD_ASSERT (sizeof (*dest) >= 4);
479 amt = shdr->sh_size * sizeof (*dest) / 4;
480 shdr->contents = bfd_alloc (abfd, amt);
481 if (shdr->contents == NULL
482 || bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0
483 || (bfd_bread (shdr->contents, shdr->sh_size, abfd)
487 /* Translate raw contents, a flag word followed by an
488 array of elf section indices all in target byte order,
489 to the flag word followed by an array of elf section
491 src = shdr->contents + shdr->sh_size;
492 dest = (Elf_Internal_Group *) (shdr->contents + amt);
499 idx = H_GET_32 (abfd, src);
500 if (src == shdr->contents)
503 if (shdr->bfd_section != NULL && (idx & GRP_COMDAT))
504 shdr->bfd_section->flags
505 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
510 ((*_bfd_error_handler)
511 (_("%s: invalid SHT_GROUP entry"),
512 bfd_archive_filename (abfd)));
515 dest->shdr = elf_elfsections (abfd)[idx];
522 if (num_group != (unsigned) -1)
526 for (i = 0; i < num_group; i++)
528 Elf_Internal_Shdr *shdr = elf_tdata (abfd)->group_sect_ptr[i];
529 Elf_Internal_Group *idx = (Elf_Internal_Group *) shdr->contents;
530 unsigned int n_elt = shdr->sh_size / 4;
532 /* Look through this group's sections to see if current
533 section is a member. */
535 if ((++idx)->shdr == hdr)
539 /* We are a member of this group. Go looking through
540 other members to see if any others are linked via
542 idx = (Elf_Internal_Group *) shdr->contents;
543 n_elt = shdr->sh_size / 4;
545 if ((s = (++idx)->shdr->bfd_section) != NULL
546 && elf_next_in_group (s) != NULL)
550 /* Snarf the group name from other member, and
551 insert current section in circular list. */
552 elf_group_name (newsect) = elf_group_name (s);
553 elf_next_in_group (newsect) = elf_next_in_group (s);
554 elf_next_in_group (s) = newsect;
560 gname = group_signature (abfd, shdr);
563 elf_group_name (newsect) = gname;
565 /* Start a circular list with one element. */
566 elf_next_in_group (newsect) = newsect;
569 /* If the group section has been created, point to the
571 if (shdr->bfd_section != NULL)
572 elf_next_in_group (shdr->bfd_section) = newsect;
580 if (elf_group_name (newsect) == NULL)
582 (*_bfd_error_handler) (_("%s: no group info for section %s"),
583 bfd_archive_filename (abfd), newsect->name);
589 bfd_elf_discard_group (abfd, group)
590 bfd *abfd ATTRIBUTE_UNUSED;
593 asection *first = elf_next_in_group (group);
598 s->output_section = bfd_abs_section_ptr;
599 s = elf_next_in_group (s);
600 /* These lists are circular. */
607 /* Make a BFD section from an ELF section. We store a pointer to the
608 BFD section in the bfd_section field of the header. */
611 _bfd_elf_make_section_from_shdr (abfd, hdr, name)
613 Elf_Internal_Shdr *hdr;
618 struct elf_backend_data *bed;
620 if (hdr->bfd_section != NULL)
622 BFD_ASSERT (strcmp (name,
623 bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
627 newsect = bfd_make_section_anyway (abfd, name);
631 newsect->filepos = hdr->sh_offset;
633 if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
634 || ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
635 || ! bfd_set_section_alignment (abfd, newsect,
636 bfd_log2 ((bfd_vma) hdr->sh_addralign)))
639 flags = SEC_NO_FLAGS;
640 if (hdr->sh_type != SHT_NOBITS)
641 flags |= SEC_HAS_CONTENTS;
642 if (hdr->sh_type == SHT_GROUP)
643 flags |= SEC_GROUP | SEC_EXCLUDE;
644 if ((hdr->sh_flags & SHF_ALLOC) != 0)
647 if (hdr->sh_type != SHT_NOBITS)
650 if ((hdr->sh_flags & SHF_WRITE) == 0)
651 flags |= SEC_READONLY;
652 if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
654 else if ((flags & SEC_LOAD) != 0)
656 if ((hdr->sh_flags & SHF_MERGE) != 0)
659 newsect->entsize = hdr->sh_entsize;
660 if ((hdr->sh_flags & SHF_STRINGS) != 0)
661 flags |= SEC_STRINGS;
663 if (hdr->sh_flags & SHF_GROUP)
664 if (!setup_group (abfd, hdr, newsect))
666 if ((hdr->sh_flags & SHF_TLS) != 0)
667 flags |= SEC_THREAD_LOCAL;
669 /* The debugging sections appear to be recognized only by name, not
672 static const char *debug_sec_names [] =
681 for (i = ARRAY_SIZE (debug_sec_names); i--;)
682 if (strncmp (name, debug_sec_names[i], strlen (debug_sec_names[i])) == 0)
686 flags |= SEC_DEBUGGING;
689 /* As a GNU extension, if the name begins with .gnu.linkonce, we
690 only link a single copy of the section. This is used to support
691 g++. g++ will emit each template expansion in its own section.
692 The symbols will be defined as weak, so that multiple definitions
693 are permitted. The GNU linker extension is to actually discard
694 all but one of the sections. */
695 if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
696 && elf_next_in_group (newsect) == NULL)
697 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
699 bed = get_elf_backend_data (abfd);
700 if (bed->elf_backend_section_flags)
701 if (! bed->elf_backend_section_flags (&flags, hdr))
704 if (! bfd_set_section_flags (abfd, newsect, flags))
707 if ((flags & SEC_ALLOC) != 0)
709 Elf_Internal_Phdr *phdr;
712 /* Look through the phdrs to see if we need to adjust the lma.
713 If all the p_paddr fields are zero, we ignore them, since
714 some ELF linkers produce such output. */
715 phdr = elf_tdata (abfd)->phdr;
716 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
718 if (phdr->p_paddr != 0)
721 if (i < elf_elfheader (abfd)->e_phnum)
723 phdr = elf_tdata (abfd)->phdr;
724 for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
726 /* This section is part of this segment if its file
727 offset plus size lies within the segment's memory
728 span and, if the section is loaded, the extent of the
729 loaded data lies within the extent of the segment.
731 Note - we used to check the p_paddr field as well, and
732 refuse to set the LMA if it was 0. This is wrong
733 though, as a perfectly valid initialised segment can
734 have a p_paddr of zero. Some architectures, eg ARM,
735 place special significance on the address 0 and
736 executables need to be able to have a segment which
737 covers this address. */
738 if (phdr->p_type == PT_LOAD
739 && (bfd_vma) hdr->sh_offset >= phdr->p_offset
740 && (hdr->sh_offset + hdr->sh_size
741 <= phdr->p_offset + phdr->p_memsz)
742 && ((flags & SEC_LOAD) == 0
743 || (hdr->sh_offset + hdr->sh_size
744 <= phdr->p_offset + phdr->p_filesz)))
746 if ((flags & SEC_LOAD) == 0)
747 newsect->lma = (phdr->p_paddr
748 + hdr->sh_addr - phdr->p_vaddr);
750 /* We used to use the same adjustment for SEC_LOAD
751 sections, but that doesn't work if the segment
752 is packed with code from multiple VMAs.
753 Instead we calculate the section LMA based on
754 the segment LMA. It is assumed that the
755 segment will contain sections with contiguous
756 LMAs, even if the VMAs are not. */
757 newsect->lma = (phdr->p_paddr
758 + hdr->sh_offset - phdr->p_offset);
760 /* With contiguous segments, we can't tell from file
761 offsets whether a section with zero size should
762 be placed at the end of one segment or the
763 beginning of the next. Decide based on vaddr. */
764 if (hdr->sh_addr >= phdr->p_vaddr
765 && (hdr->sh_addr + hdr->sh_size
766 <= phdr->p_vaddr + phdr->p_memsz))
773 hdr->bfd_section = newsect;
774 elf_section_data (newsect)->this_hdr = *hdr;
784 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
787 Helper functions for GDB to locate the string tables.
788 Since BFD hides string tables from callers, GDB needs to use an
789 internal hook to find them. Sun's .stabstr, in particular,
790 isn't even pointed to by the .stab section, so ordinary
791 mechanisms wouldn't work to find it, even if we had some.
794 struct elf_internal_shdr *
795 bfd_elf_find_section (abfd, name)
799 Elf_Internal_Shdr **i_shdrp;
804 i_shdrp = elf_elfsections (abfd);
807 shstrtab = bfd_elf_get_str_section (abfd,
808 elf_elfheader (abfd)->e_shstrndx);
809 if (shstrtab != NULL)
811 max = elf_numsections (abfd);
812 for (i = 1; i < max; i++)
813 if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
820 const char *const bfd_elf_section_type_names[] = {
821 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
822 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
823 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
826 /* ELF relocs are against symbols. If we are producing relocateable
827 output, and the reloc is against an external symbol, and nothing
828 has given us any additional addend, the resulting reloc will also
829 be against the same symbol. In such a case, we don't want to
830 change anything about the way the reloc is handled, since it will
831 all be done at final link time. Rather than put special case code
832 into bfd_perform_relocation, all the reloc types use this howto
833 function. It just short circuits the reloc if producing
834 relocateable output against an external symbol. */
836 bfd_reloc_status_type
837 bfd_elf_generic_reloc (abfd,
844 bfd *abfd ATTRIBUTE_UNUSED;
845 arelent *reloc_entry;
847 PTR data ATTRIBUTE_UNUSED;
848 asection *input_section;
850 char **error_message ATTRIBUTE_UNUSED;
852 if (output_bfd != (bfd *) NULL
853 && (symbol->flags & BSF_SECTION_SYM) == 0
854 && (! reloc_entry->howto->partial_inplace
855 || reloc_entry->addend == 0))
857 reloc_entry->address += input_section->output_offset;
861 return bfd_reloc_continue;
864 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
867 merge_sections_remove_hook (abfd, sec)
868 bfd *abfd ATTRIBUTE_UNUSED;
871 struct bfd_elf_section_data *sec_data;
873 sec_data = elf_section_data (sec);
874 BFD_ASSERT (sec_data->sec_info_type == ELF_INFO_TYPE_MERGE);
875 sec_data->sec_info_type = ELF_INFO_TYPE_NONE;
878 /* Finish SHF_MERGE section merging. */
881 _bfd_elf_merge_sections (abfd, info)
883 struct bfd_link_info *info;
885 if (!is_elf_hash_table (info))
887 if (elf_hash_table (info)->merge_info)
888 _bfd_merge_sections (abfd, elf_hash_table (info)->merge_info,
889 merge_sections_remove_hook);
894 _bfd_elf_link_just_syms (sec, info)
896 struct bfd_link_info *info;
898 sec->output_section = bfd_abs_section_ptr;
899 sec->output_offset = sec->vma;
900 if (!is_elf_hash_table (info))
903 elf_section_data (sec)->sec_info_type = ELF_INFO_TYPE_JUST_SYMS;
906 /* Copy the program header and other data from one object module to
910 _bfd_elf_copy_private_bfd_data (ibfd, obfd)
914 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
915 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
918 BFD_ASSERT (!elf_flags_init (obfd)
919 || (elf_elfheader (obfd)->e_flags
920 == elf_elfheader (ibfd)->e_flags));
922 elf_gp (obfd) = elf_gp (ibfd);
923 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
924 elf_flags_init (obfd) = true;
928 /* Print out the program headers. */
931 _bfd_elf_print_private_bfd_data (abfd, farg)
935 FILE *f = (FILE *) farg;
936 Elf_Internal_Phdr *p;
938 bfd_byte *dynbuf = NULL;
940 p = elf_tdata (abfd)->phdr;
945 fprintf (f, _("\nProgram Header:\n"));
946 c = elf_elfheader (abfd)->e_phnum;
947 for (i = 0; i < c; i++, p++)
954 case PT_NULL: pt = "NULL"; break;
955 case PT_LOAD: pt = "LOAD"; break;
956 case PT_DYNAMIC: pt = "DYNAMIC"; break;
957 case PT_INTERP: pt = "INTERP"; break;
958 case PT_NOTE: pt = "NOTE"; break;
959 case PT_SHLIB: pt = "SHLIB"; break;
960 case PT_PHDR: pt = "PHDR"; break;
961 case PT_TLS: pt = "TLS"; break;
962 case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
963 default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
965 fprintf (f, "%8s off 0x", pt);
966 bfd_fprintf_vma (abfd, f, p->p_offset);
967 fprintf (f, " vaddr 0x");
968 bfd_fprintf_vma (abfd, f, p->p_vaddr);
969 fprintf (f, " paddr 0x");
970 bfd_fprintf_vma (abfd, f, p->p_paddr);
971 fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
972 fprintf (f, " filesz 0x");
973 bfd_fprintf_vma (abfd, f, p->p_filesz);
974 fprintf (f, " memsz 0x");
975 bfd_fprintf_vma (abfd, f, p->p_memsz);
976 fprintf (f, " flags %c%c%c",
977 (p->p_flags & PF_R) != 0 ? 'r' : '-',
978 (p->p_flags & PF_W) != 0 ? 'w' : '-',
979 (p->p_flags & PF_X) != 0 ? 'x' : '-');
980 if ((p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X)) != 0)
981 fprintf (f, " %lx", p->p_flags &~ (unsigned) (PF_R | PF_W | PF_X));
986 s = bfd_get_section_by_name (abfd, ".dynamic");
990 unsigned long shlink;
991 bfd_byte *extdyn, *extdynend;
993 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
995 fprintf (f, _("\nDynamic Section:\n"));
997 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1000 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1004 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1007 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1009 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1010 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1013 extdynend = extdyn + s->_raw_size;
1014 for (; extdyn < extdynend; extdyn += extdynsize)
1016 Elf_Internal_Dyn dyn;
1021 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1023 if (dyn.d_tag == DT_NULL)
1030 sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
1034 case DT_NEEDED: name = "NEEDED"; stringp = true; break;
1035 case DT_PLTRELSZ: name = "PLTRELSZ"; break;
1036 case DT_PLTGOT: name = "PLTGOT"; break;
1037 case DT_HASH: name = "HASH"; break;
1038 case DT_STRTAB: name = "STRTAB"; break;
1039 case DT_SYMTAB: name = "SYMTAB"; break;
1040 case DT_RELA: name = "RELA"; break;
1041 case DT_RELASZ: name = "RELASZ"; break;
1042 case DT_RELAENT: name = "RELAENT"; break;
1043 case DT_STRSZ: name = "STRSZ"; break;
1044 case DT_SYMENT: name = "SYMENT"; break;
1045 case DT_INIT: name = "INIT"; break;
1046 case DT_FINI: name = "FINI"; break;
1047 case DT_SONAME: name = "SONAME"; stringp = true; break;
1048 case DT_RPATH: name = "RPATH"; stringp = true; break;
1049 case DT_SYMBOLIC: name = "SYMBOLIC"; break;
1050 case DT_REL: name = "REL"; break;
1051 case DT_RELSZ: name = "RELSZ"; break;
1052 case DT_RELENT: name = "RELENT"; break;
1053 case DT_PLTREL: name = "PLTREL"; break;
1054 case DT_DEBUG: name = "DEBUG"; break;
1055 case DT_TEXTREL: name = "TEXTREL"; break;
1056 case DT_JMPREL: name = "JMPREL"; break;
1057 case DT_BIND_NOW: name = "BIND_NOW"; break;
1058 case DT_INIT_ARRAY: name = "INIT_ARRAY"; break;
1059 case DT_FINI_ARRAY: name = "FINI_ARRAY"; break;
1060 case DT_INIT_ARRAYSZ: name = "INIT_ARRAYSZ"; break;
1061 case DT_FINI_ARRAYSZ: name = "FINI_ARRAYSZ"; break;
1062 case DT_RUNPATH: name = "RUNPATH"; stringp = true; break;
1063 case DT_FLAGS: name = "FLAGS"; break;
1064 case DT_PREINIT_ARRAY: name = "PREINIT_ARRAY"; break;
1065 case DT_PREINIT_ARRAYSZ: name = "PREINIT_ARRAYSZ"; break;
1066 case DT_CHECKSUM: name = "CHECKSUM"; break;
1067 case DT_PLTPADSZ: name = "PLTPADSZ"; break;
1068 case DT_MOVEENT: name = "MOVEENT"; break;
1069 case DT_MOVESZ: name = "MOVESZ"; break;
1070 case DT_FEATURE: name = "FEATURE"; break;
1071 case DT_POSFLAG_1: name = "POSFLAG_1"; break;
1072 case DT_SYMINSZ: name = "SYMINSZ"; break;
1073 case DT_SYMINENT: name = "SYMINENT"; break;
1074 case DT_CONFIG: name = "CONFIG"; stringp = true; break;
1075 case DT_DEPAUDIT: name = "DEPAUDIT"; stringp = true; break;
1076 case DT_AUDIT: name = "AUDIT"; stringp = true; break;
1077 case DT_PLTPAD: name = "PLTPAD"; break;
1078 case DT_MOVETAB: name = "MOVETAB"; break;
1079 case DT_SYMINFO: name = "SYMINFO"; break;
1080 case DT_RELACOUNT: name = "RELACOUNT"; break;
1081 case DT_RELCOUNT: name = "RELCOUNT"; break;
1082 case DT_FLAGS_1: name = "FLAGS_1"; break;
1083 case DT_VERSYM: name = "VERSYM"; break;
1084 case DT_VERDEF: name = "VERDEF"; break;
1085 case DT_VERDEFNUM: name = "VERDEFNUM"; break;
1086 case DT_VERNEED: name = "VERNEED"; break;
1087 case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
1088 case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
1089 case DT_USED: name = "USED"; break;
1090 case DT_FILTER: name = "FILTER"; stringp = true; break;
1093 fprintf (f, " %-11s ", name);
1095 fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
1099 unsigned int tagv = dyn.d_un.d_val;
1101 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1104 fprintf (f, "%s", string);
1113 if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
1114 || (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
1116 if (! _bfd_elf_slurp_version_tables (abfd))
1120 if (elf_dynverdef (abfd) != 0)
1122 Elf_Internal_Verdef *t;
1124 fprintf (f, _("\nVersion definitions:\n"));
1125 for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
1127 fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
1128 t->vd_flags, t->vd_hash, t->vd_nodename);
1129 if (t->vd_auxptr->vda_nextptr != NULL)
1131 Elf_Internal_Verdaux *a;
1134 for (a = t->vd_auxptr->vda_nextptr;
1137 fprintf (f, "%s ", a->vda_nodename);
1143 if (elf_dynverref (abfd) != 0)
1145 Elf_Internal_Verneed *t;
1147 fprintf (f, _("\nVersion References:\n"));
1148 for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
1150 Elf_Internal_Vernaux *a;
1152 fprintf (f, _(" required from %s:\n"), t->vn_filename);
1153 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1154 fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
1155 a->vna_flags, a->vna_other, a->vna_nodename);
1167 /* Display ELF-specific fields of a symbol. */
1170 bfd_elf_print_symbol (abfd, filep, symbol, how)
1174 bfd_print_symbol_type how;
1176 FILE *file = (FILE *) filep;
1179 case bfd_print_symbol_name:
1180 fprintf (file, "%s", symbol->name);
1182 case bfd_print_symbol_more:
1183 fprintf (file, "elf ");
1184 bfd_fprintf_vma (abfd, file, symbol->value);
1185 fprintf (file, " %lx", (long) symbol->flags);
1187 case bfd_print_symbol_all:
1189 const char *section_name;
1190 const char *name = NULL;
1191 struct elf_backend_data *bed;
1192 unsigned char st_other;
1195 section_name = symbol->section ? symbol->section->name : "(*none*)";
1197 bed = get_elf_backend_data (abfd);
1198 if (bed->elf_backend_print_symbol_all)
1199 name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
1203 name = symbol->name;
1204 bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
1207 fprintf (file, " %s\t", section_name);
1208 /* Print the "other" value for a symbol. For common symbols,
1209 we've already printed the size; now print the alignment.
1210 For other symbols, we have no specified alignment, and
1211 we've printed the address; now print the size. */
1212 if (bfd_is_com_section (symbol->section))
1213 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
1215 val = ((elf_symbol_type *) symbol)->internal_elf_sym.st_size;
1216 bfd_fprintf_vma (abfd, file, val);
1218 /* If we have version information, print it. */
1219 if (elf_tdata (abfd)->dynversym_section != 0
1220 && (elf_tdata (abfd)->dynverdef_section != 0
1221 || elf_tdata (abfd)->dynverref_section != 0))
1223 unsigned int vernum;
1224 const char *version_string;
1226 vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
1229 version_string = "";
1230 else if (vernum == 1)
1231 version_string = "Base";
1232 else if (vernum <= elf_tdata (abfd)->cverdefs)
1234 elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
1237 Elf_Internal_Verneed *t;
1239 version_string = "";
1240 for (t = elf_tdata (abfd)->verref;
1244 Elf_Internal_Vernaux *a;
1246 for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
1248 if (a->vna_other == vernum)
1250 version_string = a->vna_nodename;
1257 if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
1258 fprintf (file, " %-11s", version_string);
1263 fprintf (file, " (%s)", version_string);
1264 for (i = 10 - strlen (version_string); i > 0; --i)
1269 /* If the st_other field is not zero, print it. */
1270 st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
1275 case STV_INTERNAL: fprintf (file, " .internal"); break;
1276 case STV_HIDDEN: fprintf (file, " .hidden"); break;
1277 case STV_PROTECTED: fprintf (file, " .protected"); break;
1279 /* Some other non-defined flags are also present, so print
1281 fprintf (file, " 0x%02x", (unsigned int) st_other);
1284 fprintf (file, " %s", name);
1290 /* Create an entry in an ELF linker hash table. */
1292 struct bfd_hash_entry *
1293 _bfd_elf_link_hash_newfunc (entry, table, string)
1294 struct bfd_hash_entry *entry;
1295 struct bfd_hash_table *table;
1298 /* Allocate the structure if it has not already been allocated by a
1302 entry = bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry));
1307 /* Call the allocation method of the superclass. */
1308 entry = _bfd_link_hash_newfunc (entry, table, string);
1311 struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
1312 struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table;
1314 /* Set local fields. */
1318 ret->dynstr_index = 0;
1319 ret->weakdef = NULL;
1320 ret->got.refcount = htab->init_refcount;
1321 ret->plt.refcount = htab->init_refcount;
1322 ret->linker_section_pointer = NULL;
1323 ret->verinfo.verdef = NULL;
1324 ret->vtable_entries_used = NULL;
1325 ret->vtable_entries_size = 0;
1326 ret->vtable_parent = NULL;
1327 ret->type = STT_NOTYPE;
1329 /* Assume that we have been called by a non-ELF symbol reader.
1330 This flag is then reset by the code which reads an ELF input
1331 file. This ensures that a symbol created by a non-ELF symbol
1332 reader will have the flag set correctly. */
1333 ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
1339 /* Copy data from an indirect symbol to its direct symbol, hiding the
1340 old indirect symbol. Also used for copying flags to a weakdef. */
1343 _bfd_elf_link_hash_copy_indirect (dir, ind)
1344 struct elf_link_hash_entry *dir, *ind;
1348 /* Copy down any references that we may have already seen to the
1349 symbol which just became indirect. */
1351 dir->elf_link_hash_flags |=
1352 (ind->elf_link_hash_flags
1353 & (ELF_LINK_HASH_REF_DYNAMIC
1354 | ELF_LINK_HASH_REF_REGULAR
1355 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
1356 | ELF_LINK_NON_GOT_REF));
1358 if (ind->root.type != bfd_link_hash_indirect)
1361 /* Copy over the global and procedure linkage table refcount entries.
1362 These may have been already set up by a check_relocs routine. */
1363 tmp = dir->got.refcount;
1366 dir->got.refcount = ind->got.refcount;
1367 ind->got.refcount = tmp;
1370 BFD_ASSERT (ind->got.refcount <= 0);
1372 tmp = dir->plt.refcount;
1375 dir->plt.refcount = ind->plt.refcount;
1376 ind->plt.refcount = tmp;
1379 BFD_ASSERT (ind->plt.refcount <= 0);
1381 if (dir->dynindx == -1)
1383 dir->dynindx = ind->dynindx;
1384 dir->dynstr_index = ind->dynstr_index;
1386 ind->dynstr_index = 0;
1389 BFD_ASSERT (ind->dynindx == -1);
1393 _bfd_elf_link_hash_hide_symbol (info, h, force_local)
1394 struct bfd_link_info *info;
1395 struct elf_link_hash_entry *h;
1396 boolean force_local;
1398 h->plt.offset = (bfd_vma) -1;
1399 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1402 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1403 if (h->dynindx != -1)
1406 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1412 /* Initialize an ELF linker hash table. */
1415 _bfd_elf_link_hash_table_init (table, abfd, newfunc)
1416 struct elf_link_hash_table *table;
1418 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
1419 struct bfd_hash_table *,
1424 table->dynamic_sections_created = false;
1425 table->dynobj = NULL;
1426 table->init_refcount = get_elf_backend_data (abfd)->can_refcount - 1;
1427 /* The first dynamic symbol is a dummy. */
1428 table->dynsymcount = 1;
1429 table->dynstr = NULL;
1430 table->bucketcount = 0;
1431 table->needed = NULL;
1432 table->runpath = NULL;
1433 table->loaded = NULL;
1435 table->stab_info = NULL;
1436 table->merge_info = NULL;
1437 table->dynlocal = NULL;
1438 ret = _bfd_link_hash_table_init (& table->root, abfd, newfunc);
1439 table->root.type = bfd_link_elf_hash_table;
1444 /* Create an ELF linker hash table. */
1446 struct bfd_link_hash_table *
1447 _bfd_elf_link_hash_table_create (abfd)
1450 struct elf_link_hash_table *ret;
1451 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1453 ret = (struct elf_link_hash_table *) bfd_malloc (amt);
1454 if (ret == (struct elf_link_hash_table *) NULL)
1457 if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
1466 /* This is a hook for the ELF emulation code in the generic linker to
1467 tell the backend linker what file name to use for the DT_NEEDED
1468 entry for a dynamic object. The generic linker passes name as an
1469 empty string to indicate that no DT_NEEDED entry should be made. */
1472 bfd_elf_set_dt_needed_name (abfd, name)
1476 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1477 && bfd_get_format (abfd) == bfd_object)
1478 elf_dt_name (abfd) = name;
1482 bfd_elf_set_dt_needed_soname (abfd, name)
1486 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1487 && bfd_get_format (abfd) == bfd_object)
1488 elf_dt_soname (abfd) = name;
1491 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1492 the linker ELF emulation code. */
1494 struct bfd_link_needed_list *
1495 bfd_elf_get_needed_list (abfd, info)
1496 bfd *abfd ATTRIBUTE_UNUSED;
1497 struct bfd_link_info *info;
1499 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1501 return elf_hash_table (info)->needed;
1504 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1505 hook for the linker ELF emulation code. */
1507 struct bfd_link_needed_list *
1508 bfd_elf_get_runpath_list (abfd, info)
1509 bfd *abfd ATTRIBUTE_UNUSED;
1510 struct bfd_link_info *info;
1512 if (info->hash->creator->flavour != bfd_target_elf_flavour)
1514 return elf_hash_table (info)->runpath;
1517 /* Get the name actually used for a dynamic object for a link. This
1518 is the SONAME entry if there is one. Otherwise, it is the string
1519 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1522 bfd_elf_get_dt_soname (abfd)
1525 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
1526 && bfd_get_format (abfd) == bfd_object)
1527 return elf_dt_name (abfd);
1531 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1532 the ELF linker emulation code. */
1535 bfd_elf_get_bfd_needed_list (abfd, pneeded)
1537 struct bfd_link_needed_list **pneeded;
1540 bfd_byte *dynbuf = NULL;
1542 unsigned long shlink;
1543 bfd_byte *extdyn, *extdynend;
1545 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1549 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
1550 || bfd_get_format (abfd) != bfd_object)
1553 s = bfd_get_section_by_name (abfd, ".dynamic");
1554 if (s == NULL || s->_raw_size == 0)
1557 dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
1561 if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
1565 elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
1569 shlink = elf_elfsections (abfd)[elfsec]->sh_link;
1571 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
1572 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
1575 extdynend = extdyn + s->_raw_size;
1576 for (; extdyn < extdynend; extdyn += extdynsize)
1578 Elf_Internal_Dyn dyn;
1580 (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
1582 if (dyn.d_tag == DT_NULL)
1585 if (dyn.d_tag == DT_NEEDED)
1588 struct bfd_link_needed_list *l;
1589 unsigned int tagv = dyn.d_un.d_val;
1592 string = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
1597 l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
1618 /* Allocate an ELF string table--force the first byte to be zero. */
1620 struct bfd_strtab_hash *
1621 _bfd_elf_stringtab_init ()
1623 struct bfd_strtab_hash *ret;
1625 ret = _bfd_stringtab_init ();
1630 loc = _bfd_stringtab_add (ret, "", true, false);
1631 BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
1632 if (loc == (bfd_size_type) -1)
1634 _bfd_stringtab_free (ret);
1641 /* ELF .o/exec file reading */
1643 /* Create a new bfd section from an ELF section header. */
1646 bfd_section_from_shdr (abfd, shindex)
1648 unsigned int shindex;
1650 Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
1651 Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
1652 struct elf_backend_data *bed = get_elf_backend_data (abfd);
1655 name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
1657 switch (hdr->sh_type)
1660 /* Inactive section. Throw it away. */
1663 case SHT_PROGBITS: /* Normal section with contents. */
1664 case SHT_NOBITS: /* .bss section. */
1665 case SHT_HASH: /* .hash section. */
1666 case SHT_NOTE: /* .note section. */
1667 case SHT_INIT_ARRAY: /* .init_array section. */
1668 case SHT_FINI_ARRAY: /* .fini_array section. */
1669 case SHT_PREINIT_ARRAY: /* .preinit_array section. */
1670 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1672 case SHT_DYNAMIC: /* Dynamic linking information. */
1673 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1675 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_STRTAB)
1677 Elf_Internal_Shdr *dynsymhdr;
1679 /* The shared libraries distributed with hpux11 have a bogus
1680 sh_link field for the ".dynamic" section. Find the
1681 string table for the ".dynsym" section instead. */
1682 if (elf_dynsymtab (abfd) != 0)
1684 dynsymhdr = elf_elfsections (abfd)[elf_dynsymtab (abfd)];
1685 hdr->sh_link = dynsymhdr->sh_link;
1689 unsigned int i, num_sec;
1691 num_sec = elf_numsections (abfd);
1692 for (i = 1; i < num_sec; i++)
1694 dynsymhdr = elf_elfsections (abfd)[i];
1695 if (dynsymhdr->sh_type == SHT_DYNSYM)
1697 hdr->sh_link = dynsymhdr->sh_link;
1705 case SHT_SYMTAB: /* A symbol table */
1706 if (elf_onesymtab (abfd) == shindex)
1709 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1710 BFD_ASSERT (elf_onesymtab (abfd) == 0);
1711 elf_onesymtab (abfd) = shindex;
1712 elf_tdata (abfd)->symtab_hdr = *hdr;
1713 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
1714 abfd->flags |= HAS_SYMS;
1716 /* Sometimes a shared object will map in the symbol table. If
1717 SHF_ALLOC is set, and this is a shared object, then we also
1718 treat this section as a BFD section. We can not base the
1719 decision purely on SHF_ALLOC, because that flag is sometimes
1720 set in a relocateable object file, which would confuse the
1722 if ((hdr->sh_flags & SHF_ALLOC) != 0
1723 && (abfd->flags & DYNAMIC) != 0
1724 && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1729 case SHT_DYNSYM: /* A dynamic symbol table */
1730 if (elf_dynsymtab (abfd) == shindex)
1733 BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
1734 BFD_ASSERT (elf_dynsymtab (abfd) == 0);
1735 elf_dynsymtab (abfd) = shindex;
1736 elf_tdata (abfd)->dynsymtab_hdr = *hdr;
1737 elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
1738 abfd->flags |= HAS_SYMS;
1740 /* Besides being a symbol table, we also treat this as a regular
1741 section, so that objcopy can handle it. */
1742 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1744 case SHT_SYMTAB_SHNDX: /* Symbol section indices when >64k sections */
1745 if (elf_symtab_shndx (abfd) == shindex)
1748 /* Get the associated symbol table. */
1749 if (! bfd_section_from_shdr (abfd, hdr->sh_link)
1750 || hdr->sh_link != elf_onesymtab (abfd))
1753 elf_symtab_shndx (abfd) = shindex;
1754 elf_tdata (abfd)->symtab_shndx_hdr = *hdr;
1755 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_shndx_hdr;
1758 case SHT_STRTAB: /* A string table */
1759 if (hdr->bfd_section != NULL)
1761 if (ehdr->e_shstrndx == shindex)
1763 elf_tdata (abfd)->shstrtab_hdr = *hdr;
1764 elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
1768 unsigned int i, num_sec;
1770 num_sec = elf_numsections (abfd);
1771 for (i = 1; i < num_sec; i++)
1773 Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
1774 if (hdr2->sh_link == shindex)
1776 if (! bfd_section_from_shdr (abfd, i))
1778 if (elf_onesymtab (abfd) == i)
1780 elf_tdata (abfd)->strtab_hdr = *hdr;
1781 elf_elfsections (abfd)[shindex] =
1782 &elf_tdata (abfd)->strtab_hdr;
1785 if (elf_dynsymtab (abfd) == i)
1787 elf_tdata (abfd)->dynstrtab_hdr = *hdr;
1788 elf_elfsections (abfd)[shindex] = hdr =
1789 &elf_tdata (abfd)->dynstrtab_hdr;
1790 /* We also treat this as a regular section, so
1791 that objcopy can handle it. */
1794 #if 0 /* Not handling other string tables specially right now. */
1795 hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
1796 /* We have a strtab for some random other section. */
1797 newsect = (asection *) hdr2->bfd_section;
1800 hdr->bfd_section = newsect;
1801 hdr2 = &elf_section_data (newsect)->str_hdr;
1803 elf_elfsections (abfd)[shindex] = hdr2;
1809 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1813 /* *These* do a lot of work -- but build no sections! */
1815 asection *target_sect;
1816 Elf_Internal_Shdr *hdr2;
1817 unsigned int num_sec = elf_numsections (abfd);
1819 /* Check for a bogus link to avoid crashing. */
1820 if ((hdr->sh_link >= SHN_LORESERVE && hdr->sh_link <= SHN_HIRESERVE)
1821 || hdr->sh_link >= num_sec)
1823 ((*_bfd_error_handler)
1824 (_("%s: invalid link %lu for reloc section %s (index %u)"),
1825 bfd_archive_filename (abfd), hdr->sh_link, name, shindex));
1826 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1829 /* For some incomprehensible reason Oracle distributes
1830 libraries for Solaris in which some of the objects have
1831 bogus sh_link fields. It would be nice if we could just
1832 reject them, but, unfortunately, some people need to use
1833 them. We scan through the section headers; if we find only
1834 one suitable symbol table, we clobber the sh_link to point
1835 to it. I hope this doesn't break anything. */
1836 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
1837 && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
1843 for (scan = 1; scan < num_sec; scan++)
1845 if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
1846 || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
1857 hdr->sh_link = found;
1860 /* Get the symbol table. */
1861 if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
1862 && ! bfd_section_from_shdr (abfd, hdr->sh_link))
1865 /* If this reloc section does not use the main symbol table we
1866 don't treat it as a reloc section. BFD can't adequately
1867 represent such a section, so at least for now, we don't
1868 try. We just present it as a normal section. We also
1869 can't use it as a reloc section if it points to the null
1871 if (hdr->sh_link != elf_onesymtab (abfd) || hdr->sh_info == SHN_UNDEF)
1872 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1874 if (! bfd_section_from_shdr (abfd, hdr->sh_info))
1876 target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
1877 if (target_sect == NULL)
1880 if ((target_sect->flags & SEC_RELOC) == 0
1881 || target_sect->reloc_count == 0)
1882 hdr2 = &elf_section_data (target_sect)->rel_hdr;
1886 BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
1887 amt = sizeof (*hdr2);
1888 hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
1889 elf_section_data (target_sect)->rel_hdr2 = hdr2;
1892 elf_elfsections (abfd)[shindex] = hdr2;
1893 target_sect->reloc_count += NUM_SHDR_ENTRIES (hdr);
1894 target_sect->flags |= SEC_RELOC;
1895 target_sect->relocation = NULL;
1896 target_sect->rel_filepos = hdr->sh_offset;
1897 /* In the section to which the relocations apply, mark whether
1898 its relocations are of the REL or RELA variety. */
1899 if (hdr->sh_size != 0)
1900 elf_section_data (target_sect)->use_rela_p
1901 = (hdr->sh_type == SHT_RELA);
1902 abfd->flags |= HAS_RELOC;
1907 case SHT_GNU_verdef:
1908 elf_dynverdef (abfd) = shindex;
1909 elf_tdata (abfd)->dynverdef_hdr = *hdr;
1910 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1913 case SHT_GNU_versym:
1914 elf_dynversym (abfd) = shindex;
1915 elf_tdata (abfd)->dynversym_hdr = *hdr;
1916 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1919 case SHT_GNU_verneed:
1920 elf_dynverref (abfd) = shindex;
1921 elf_tdata (abfd)->dynverref_hdr = *hdr;
1922 return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
1929 /* We need a BFD section for objcopy and relocatable linking,
1930 and it's handy to have the signature available as the section
1932 name = group_signature (abfd, hdr);
1935 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name))
1937 if (hdr->contents != NULL)
1939 Elf_Internal_Group *idx = (Elf_Internal_Group *) hdr->contents;
1940 unsigned int n_elt = hdr->sh_size / 4;
1943 if (idx->flags & GRP_COMDAT)
1944 hdr->bfd_section->flags
1945 |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1947 while (--n_elt != 0)
1948 if ((s = (++idx)->shdr->bfd_section) != NULL
1949 && elf_next_in_group (s) != NULL)
1951 elf_next_in_group (hdr->bfd_section) = s;
1958 /* Check for any processor-specific section types. */
1960 if (bed->elf_backend_section_from_shdr)
1961 (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
1969 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
1970 Return SEC for sections that have no elf section, and NULL on error. */
1973 bfd_section_from_r_symndx (abfd, cache, sec, r_symndx)
1975 struct sym_sec_cache *cache;
1977 unsigned long r_symndx;
1979 unsigned char esym_shndx[4];
1980 unsigned int isym_shndx;
1981 Elf_Internal_Shdr *symtab_hdr;
1984 unsigned int ent = r_symndx % LOCAL_SYM_CACHE_SIZE;
1986 if (cache->abfd == abfd && cache->indx[ent] == r_symndx)
1987 return cache->sec[ent];
1989 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1990 pos = symtab_hdr->sh_offset;
1991 if (get_elf_backend_data (abfd)->s->sizeof_sym
1992 == sizeof (Elf64_External_Sym))
1994 pos += r_symndx * sizeof (Elf64_External_Sym);
1995 pos += offsetof (Elf64_External_Sym, st_shndx);
1996 amt = sizeof (((Elf64_External_Sym *) 0)->st_shndx);
2000 pos += r_symndx * sizeof (Elf32_External_Sym);
2001 pos += offsetof (Elf32_External_Sym, st_shndx);
2002 amt = sizeof (((Elf32_External_Sym *) 0)->st_shndx);
2004 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2005 || bfd_bread ((PTR) esym_shndx, amt, abfd) != amt)
2007 isym_shndx = H_GET_16 (abfd, esym_shndx);
2009 if (isym_shndx == SHN_XINDEX)
2011 Elf_Internal_Shdr *shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
2012 if (shndx_hdr->sh_size != 0)
2014 pos = shndx_hdr->sh_offset;
2015 pos += r_symndx * sizeof (Elf_External_Sym_Shndx);
2016 amt = sizeof (Elf_External_Sym_Shndx);
2017 if (bfd_seek (abfd, pos, SEEK_SET) != 0
2018 || bfd_bread ((PTR) esym_shndx, amt, abfd) != amt)
2020 isym_shndx = H_GET_32 (abfd, esym_shndx);
2024 if (cache->abfd != abfd)
2026 memset (cache->indx, -1, sizeof (cache->indx));
2029 cache->indx[ent] = r_symndx;
2030 cache->sec[ent] = sec;
2031 if (isym_shndx < SHN_LORESERVE || isym_shndx > SHN_HIRESERVE)
2034 s = bfd_section_from_elf_index (abfd, isym_shndx);
2036 cache->sec[ent] = s;
2038 return cache->sec[ent];
2041 /* Given an ELF section number, retrieve the corresponding BFD
2045 bfd_section_from_elf_index (abfd, index)
2049 if (index >= elf_numsections (abfd))
2051 return elf_elfsections (abfd)[index]->bfd_section;
2055 _bfd_elf_new_section_hook (abfd, sec)
2059 struct bfd_elf_section_data *sdata;
2060 bfd_size_type amt = sizeof (*sdata);
2062 sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, amt);
2065 sec->used_by_bfd = (PTR) sdata;
2067 /* Indicate whether or not this section should use RELA relocations. */
2069 = get_elf_backend_data (abfd)->default_use_rela_p;
2074 /* Create a new bfd section from an ELF program header.
2076 Since program segments have no names, we generate a synthetic name
2077 of the form segment<NUM>, where NUM is generally the index in the
2078 program header table. For segments that are split (see below) we
2079 generate the names segment<NUM>a and segment<NUM>b.
2081 Note that some program segments may have a file size that is different than
2082 (less than) the memory size. All this means is that at execution the
2083 system must allocate the amount of memory specified by the memory size,
2084 but only initialize it with the first "file size" bytes read from the
2085 file. This would occur for example, with program segments consisting
2086 of combined data+bss.
2088 To handle the above situation, this routine generates TWO bfd sections
2089 for the single program segment. The first has the length specified by
2090 the file size of the segment, and the second has the length specified
2091 by the difference between the two sizes. In effect, the segment is split
2092 into it's initialized and uninitialized parts.
2097 _bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
2099 Elf_Internal_Phdr *hdr;
2101 const char *typename;
2109 split = ((hdr->p_memsz > 0)
2110 && (hdr->p_filesz > 0)
2111 && (hdr->p_memsz > hdr->p_filesz));
2112 sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
2113 len = strlen (namebuf) + 1;
2114 name = bfd_alloc (abfd, (bfd_size_type) len);
2117 memcpy (name, namebuf, len);
2118 newsect = bfd_make_section (abfd, name);
2119 if (newsect == NULL)
2121 newsect->vma = hdr->p_vaddr;
2122 newsect->lma = hdr->p_paddr;
2123 newsect->_raw_size = hdr->p_filesz;
2124 newsect->filepos = hdr->p_offset;
2125 newsect->flags |= SEC_HAS_CONTENTS;
2126 if (hdr->p_type == PT_LOAD)
2128 newsect->flags |= SEC_ALLOC;
2129 newsect->flags |= SEC_LOAD;
2130 if (hdr->p_flags & PF_X)
2132 /* FIXME: all we known is that it has execute PERMISSION,
2134 newsect->flags |= SEC_CODE;
2137 if (!(hdr->p_flags & PF_W))
2139 newsect->flags |= SEC_READONLY;
2144 sprintf (namebuf, "%s%db", typename, index);
2145 len = strlen (namebuf) + 1;
2146 name = bfd_alloc (abfd, (bfd_size_type) len);
2149 memcpy (name, namebuf, len);
2150 newsect = bfd_make_section (abfd, name);
2151 if (newsect == NULL)
2153 newsect->vma = hdr->p_vaddr + hdr->p_filesz;
2154 newsect->lma = hdr->p_paddr + hdr->p_filesz;
2155 newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
2156 if (hdr->p_type == PT_LOAD)
2158 newsect->flags |= SEC_ALLOC;
2159 if (hdr->p_flags & PF_X)
2160 newsect->flags |= SEC_CODE;
2162 if (!(hdr->p_flags & PF_W))
2163 newsect->flags |= SEC_READONLY;
2170 bfd_section_from_phdr (abfd, hdr, index)
2172 Elf_Internal_Phdr *hdr;
2175 struct elf_backend_data *bed;
2177 switch (hdr->p_type)
2180 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
2183 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
2186 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
2189 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
2192 if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
2194 if (! elfcore_read_notes (abfd, (file_ptr) hdr->p_offset, hdr->p_filesz))
2199 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
2202 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
2205 /* Check for any processor-specific program segment types.
2206 If no handler for them, default to making "segment" sections. */
2207 bed = get_elf_backend_data (abfd);
2208 if (bed->elf_backend_section_from_phdr)
2209 return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
2211 return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
2215 /* Initialize REL_HDR, the section-header for new section, containing
2216 relocations against ASECT. If USE_RELA_P is true, we use RELA
2217 relocations; otherwise, we use REL relocations. */
2220 _bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
2222 Elf_Internal_Shdr *rel_hdr;
2227 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2228 bfd_size_type amt = sizeof ".rela" + strlen (asect->name);
2230 name = bfd_alloc (abfd, amt);
2233 sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
2235 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd), name,
2237 if (rel_hdr->sh_name == (unsigned int) -1)
2239 rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
2240 rel_hdr->sh_entsize = (use_rela_p
2241 ? bed->s->sizeof_rela
2242 : bed->s->sizeof_rel);
2243 rel_hdr->sh_addralign = bed->s->file_align;
2244 rel_hdr->sh_flags = 0;
2245 rel_hdr->sh_addr = 0;
2246 rel_hdr->sh_size = 0;
2247 rel_hdr->sh_offset = 0;
2252 /* Set up an ELF internal section header for a section. */
2255 elf_fake_sections (abfd, asect, failedptrarg)
2260 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2261 boolean *failedptr = (boolean *) failedptrarg;
2262 Elf_Internal_Shdr *this_hdr;
2266 /* We already failed; just get out of the bfd_map_over_sections
2271 this_hdr = &elf_section_data (asect)->this_hdr;
2273 this_hdr->sh_name = (unsigned long) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2274 asect->name, false);
2275 if (this_hdr->sh_name == (unsigned long) -1)
2281 this_hdr->sh_flags = 0;
2283 if ((asect->flags & SEC_ALLOC) != 0
2284 || asect->user_set_vma)
2285 this_hdr->sh_addr = asect->vma;
2287 this_hdr->sh_addr = 0;
2289 this_hdr->sh_offset = 0;
2290 this_hdr->sh_size = asect->_raw_size;
2291 this_hdr->sh_link = 0;
2292 this_hdr->sh_addralign = 1 << asect->alignment_power;
2293 /* The sh_entsize and sh_info fields may have been set already by
2294 copy_private_section_data. */
2296 this_hdr->bfd_section = asect;
2297 this_hdr->contents = NULL;
2299 /* FIXME: This should not be based on section names. */
2300 if (strcmp (asect->name, ".dynstr") == 0)
2301 this_hdr->sh_type = SHT_STRTAB;
2302 else if (strcmp (asect->name, ".hash") == 0)
2304 this_hdr->sh_type = SHT_HASH;
2305 this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
2307 else if (strcmp (asect->name, ".dynsym") == 0)
2309 this_hdr->sh_type = SHT_DYNSYM;
2310 this_hdr->sh_entsize = bed->s->sizeof_sym;
2312 else if (strcmp (asect->name, ".dynamic") == 0)
2314 this_hdr->sh_type = SHT_DYNAMIC;
2315 this_hdr->sh_entsize = bed->s->sizeof_dyn;
2317 else if (strncmp (asect->name, ".rela", 5) == 0
2318 && get_elf_backend_data (abfd)->may_use_rela_p)
2320 this_hdr->sh_type = SHT_RELA;
2321 this_hdr->sh_entsize = bed->s->sizeof_rela;
2323 else if (strncmp (asect->name, ".rel", 4) == 0
2324 && get_elf_backend_data (abfd)->may_use_rel_p)
2326 this_hdr->sh_type = SHT_REL;
2327 this_hdr->sh_entsize = bed->s->sizeof_rel;
2329 else if (strcmp (asect->name, ".init_array") == 0)
2330 this_hdr->sh_type = SHT_INIT_ARRAY;
2331 else if (strcmp (asect->name, ".fini_array") == 0)
2332 this_hdr->sh_type = SHT_FINI_ARRAY;
2333 else if (strcmp (asect->name, ".preinit_array") == 0)
2334 this_hdr->sh_type = SHT_PREINIT_ARRAY;
2335 else if (strncmp (asect->name, ".note", 5) == 0)
2336 this_hdr->sh_type = SHT_NOTE;
2337 else if (strncmp (asect->name, ".stab", 5) == 0
2338 && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
2339 this_hdr->sh_type = SHT_STRTAB;
2340 else if (strcmp (asect->name, ".gnu.version") == 0)
2342 this_hdr->sh_type = SHT_GNU_versym;
2343 this_hdr->sh_entsize = sizeof (Elf_External_Versym);
2345 else if (strcmp (asect->name, ".gnu.version_d") == 0)
2347 this_hdr->sh_type = SHT_GNU_verdef;
2348 this_hdr->sh_entsize = 0;
2349 /* objcopy or strip will copy over sh_info, but may not set
2350 cverdefs. The linker will set cverdefs, but sh_info will be
2352 if (this_hdr->sh_info == 0)
2353 this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
2355 BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
2356 || this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
2358 else if (strcmp (asect->name, ".gnu.version_r") == 0)
2360 this_hdr->sh_type = SHT_GNU_verneed;
2361 this_hdr->sh_entsize = 0;
2362 /* objcopy or strip will copy over sh_info, but may not set
2363 cverrefs. The linker will set cverrefs, but sh_info will be
2365 if (this_hdr->sh_info == 0)
2366 this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
2368 BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
2369 || this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
2371 else if ((asect->flags & SEC_GROUP) != 0)
2373 this_hdr->sh_type = SHT_GROUP;
2374 this_hdr->sh_entsize = 4;
2376 else if ((asect->flags & SEC_ALLOC) != 0
2377 && (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2378 || (asect->flags & SEC_NEVER_LOAD) != 0))
2379 this_hdr->sh_type = SHT_NOBITS;
2381 this_hdr->sh_type = SHT_PROGBITS;
2383 if ((asect->flags & SEC_ALLOC) != 0)
2384 this_hdr->sh_flags |= SHF_ALLOC;
2385 if ((asect->flags & SEC_READONLY) == 0)
2386 this_hdr->sh_flags |= SHF_WRITE;
2387 if ((asect->flags & SEC_CODE) != 0)
2388 this_hdr->sh_flags |= SHF_EXECINSTR;
2389 if ((asect->flags & SEC_MERGE) != 0)
2391 this_hdr->sh_flags |= SHF_MERGE;
2392 this_hdr->sh_entsize = asect->entsize;
2393 if ((asect->flags & SEC_STRINGS) != 0)
2394 this_hdr->sh_flags |= SHF_STRINGS;
2396 if ((asect->flags & SEC_GROUP) == 0 && elf_group_name (asect) != NULL)
2397 this_hdr->sh_flags |= SHF_GROUP;
2398 if ((asect->flags & SEC_THREAD_LOCAL) != 0)
2399 this_hdr->sh_flags |= SHF_TLS;
2401 /* Check for processor-specific section types. */
2402 if (bed->elf_backend_fake_sections
2403 && !(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect))
2406 /* If the section has relocs, set up a section header for the
2407 SHT_REL[A] section. If two relocation sections are required for
2408 this section, it is up to the processor-specific back-end to
2409 create the other. */
2410 if ((asect->flags & SEC_RELOC) != 0
2411 && !_bfd_elf_init_reloc_shdr (abfd,
2412 &elf_section_data (asect)->rel_hdr,
2414 elf_section_data (asect)->use_rela_p))
2418 /* Fill in the contents of a SHT_GROUP section. */
2421 bfd_elf_set_group_contents (abfd, sec, failedptrarg)
2426 boolean *failedptr = (boolean *) failedptrarg;
2427 unsigned long symindx;
2428 asection *elt, *first;
2430 struct bfd_link_order *l;
2433 if (elf_section_data (sec)->this_hdr.sh_type != SHT_GROUP
2438 if (elf_group_id (sec) != NULL)
2439 symindx = elf_group_id (sec)->udata.i;
2443 /* If called from the assembler, swap_out_syms will have set up
2444 elf_section_syms; If called for "ld -r", use target_index. */
2445 if (elf_section_syms (abfd) != NULL)
2446 symindx = elf_section_syms (abfd)[sec->index]->udata.i;
2448 symindx = sec->target_index;
2450 elf_section_data (sec)->this_hdr.sh_info = symindx;
2452 /* The contents won't be allocated for "ld -r" or objcopy. */
2454 if (sec->contents == NULL)
2457 sec->contents = bfd_alloc (abfd, sec->_raw_size);
2459 /* Arrange for the section to be written out. */
2460 elf_section_data (sec)->this_hdr.contents = sec->contents;
2461 if (sec->contents == NULL)
2468 loc = sec->contents + sec->_raw_size;
2470 /* Get the pointer to the first section in the group that gas
2471 squirreled away here. objcopy arranges for this to be set to the
2472 start of the input section group. */
2473 first = elt = elf_next_in_group (sec);
2475 /* First element is a flag word. Rest of section is elf section
2476 indices for all the sections of the group. Write them backwards
2477 just to keep the group in the same order as given in .section
2478 directives, not that it matters. */
2487 s = s->output_section;
2490 idx = elf_section_data (s)->this_idx;
2491 H_PUT_32 (abfd, idx, loc);
2492 elt = elf_next_in_group (elt);
2497 /* If this is a relocatable link, then the above did nothing because
2498 SEC is the output section. Look through the input sections
2500 for (l = sec->link_order_head; l != NULL; l = l->next)
2501 if (l->type == bfd_indirect_link_order
2502 && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
2507 elf_section_data (elt->output_section)->this_idx, loc);
2508 elt = elf_next_in_group (elt);
2509 /* During a relocatable link, the lists are circular. */
2511 while (elt != elf_next_in_group (l->u.indirect.section));
2513 /* With ld -r, merging SHT_GROUP sections results in wasted space
2514 due to allowing for the flag word on each input. We may well
2515 duplicate entries too. */
2516 while ((loc -= 4) > sec->contents)
2517 H_PUT_32 (abfd, 0, loc);
2519 if (loc != sec->contents)
2522 H_PUT_32 (abfd, sec->flags & SEC_LINK_ONCE ? GRP_COMDAT : 0, loc);
2525 /* Assign all ELF section numbers. The dummy first section is handled here
2526 too. The link/info pointers for the standard section types are filled
2527 in here too, while we're at it. */
2530 assign_section_numbers (abfd)
2533 struct elf_obj_tdata *t = elf_tdata (abfd);
2535 unsigned int section_number, secn;
2536 Elf_Internal_Shdr **i_shdrp;
2541 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd));
2543 for (sec = abfd->sections; sec; sec = sec->next)
2545 struct bfd_elf_section_data *d = elf_section_data (sec);
2547 if (section_number == SHN_LORESERVE)
2548 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2549 d->this_idx = section_number++;
2550 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->this_hdr.sh_name);
2551 if ((sec->flags & SEC_RELOC) == 0)
2555 if (section_number == SHN_LORESERVE)
2556 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2557 d->rel_idx = section_number++;
2558 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr.sh_name);
2563 if (section_number == SHN_LORESERVE)
2564 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2565 d->rel_idx2 = section_number++;
2566 _bfd_elf_strtab_addref (elf_shstrtab (abfd), d->rel_hdr2->sh_name);
2572 if (section_number == SHN_LORESERVE)
2573 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2574 t->shstrtab_section = section_number++;
2575 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->shstrtab_hdr.sh_name);
2576 elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
2578 if (bfd_get_symcount (abfd) > 0)
2580 if (section_number == SHN_LORESERVE)
2581 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2582 t->symtab_section = section_number++;
2583 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
2584 if (section_number > SHN_LORESERVE - 2)
2586 if (section_number == SHN_LORESERVE)
2587 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2588 t->symtab_shndx_section = section_number++;
2589 t->symtab_shndx_hdr.sh_name
2590 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd),
2591 ".symtab_shndx", false);
2592 if (t->symtab_shndx_hdr.sh_name == (unsigned int) -1)
2595 if (section_number == SHN_LORESERVE)
2596 section_number += SHN_HIRESERVE + 1 - SHN_LORESERVE;
2597 t->strtab_section = section_number++;
2598 _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->strtab_hdr.sh_name);
2601 _bfd_elf_strtab_finalize (elf_shstrtab (abfd));
2602 t->shstrtab_hdr.sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
2604 elf_numsections (abfd) = section_number;
2605 elf_elfheader (abfd)->e_shnum = section_number;
2606 if (section_number > SHN_LORESERVE)
2607 elf_elfheader (abfd)->e_shnum -= SHN_HIRESERVE + 1 - SHN_LORESERVE;
2609 /* Set up the list of section header pointers, in agreement with the
2611 amt = section_number * sizeof (Elf_Internal_Shdr *);
2612 i_shdrp = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
2613 if (i_shdrp == NULL)
2616 amt = sizeof (Elf_Internal_Shdr);
2617 i_shdrp[0] = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
2618 if (i_shdrp[0] == NULL)
2620 bfd_release (abfd, i_shdrp);
2623 memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
2625 elf_elfsections (abfd) = i_shdrp;
2627 i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
2628 if (bfd_get_symcount (abfd) > 0)
2630 i_shdrp[t->symtab_section] = &t->symtab_hdr;
2631 if (elf_numsections (abfd) > SHN_LORESERVE)
2633 i_shdrp[t->symtab_shndx_section] = &t->symtab_shndx_hdr;
2634 t->symtab_shndx_hdr.sh_link = t->symtab_section;
2636 i_shdrp[t->strtab_section] = &t->strtab_hdr;
2637 t->symtab_hdr.sh_link = t->strtab_section;
2639 for (sec = abfd->sections; sec; sec = sec->next)
2641 struct bfd_elf_section_data *d = elf_section_data (sec);
2645 i_shdrp[d->this_idx] = &d->this_hdr;
2646 if (d->rel_idx != 0)
2647 i_shdrp[d->rel_idx] = &d->rel_hdr;
2648 if (d->rel_idx2 != 0)
2649 i_shdrp[d->rel_idx2] = d->rel_hdr2;
2651 /* Fill in the sh_link and sh_info fields while we're at it. */
2653 /* sh_link of a reloc section is the section index of the symbol
2654 table. sh_info is the section index of the section to which
2655 the relocation entries apply. */
2656 if (d->rel_idx != 0)
2658 d->rel_hdr.sh_link = t->symtab_section;
2659 d->rel_hdr.sh_info = d->this_idx;
2661 if (d->rel_idx2 != 0)
2663 d->rel_hdr2->sh_link = t->symtab_section;
2664 d->rel_hdr2->sh_info = d->this_idx;
2667 switch (d->this_hdr.sh_type)
2671 /* A reloc section which we are treating as a normal BFD
2672 section. sh_link is the section index of the symbol
2673 table. sh_info is the section index of the section to
2674 which the relocation entries apply. We assume that an
2675 allocated reloc section uses the dynamic symbol table.
2676 FIXME: How can we be sure? */
2677 s = bfd_get_section_by_name (abfd, ".dynsym");
2679 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2681 /* We look up the section the relocs apply to by name. */
2683 if (d->this_hdr.sh_type == SHT_REL)
2687 s = bfd_get_section_by_name (abfd, name);
2689 d->this_hdr.sh_info = elf_section_data (s)->this_idx;
2693 /* We assume that a section named .stab*str is a stabs
2694 string section. We look for a section with the same name
2695 but without the trailing ``str'', and set its sh_link
2696 field to point to this section. */
2697 if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
2698 && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
2703 len = strlen (sec->name);
2704 alc = (char *) bfd_malloc ((bfd_size_type) (len - 2));
2707 memcpy (alc, sec->name, len - 3);
2708 alc[len - 3] = '\0';
2709 s = bfd_get_section_by_name (abfd, alc);
2713 elf_section_data (s)->this_hdr.sh_link = d->this_idx;
2715 /* This is a .stab section. */
2716 elf_section_data (s)->this_hdr.sh_entsize =
2717 4 + 2 * bfd_get_arch_size (abfd) / 8;
2724 case SHT_GNU_verneed:
2725 case SHT_GNU_verdef:
2726 /* sh_link is the section header index of the string table
2727 used for the dynamic entries, or the symbol table, or the
2729 s = bfd_get_section_by_name (abfd, ".dynstr");
2731 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2735 case SHT_GNU_versym:
2736 /* sh_link is the section header index of the symbol table
2737 this hash table or version table is for. */
2738 s = bfd_get_section_by_name (abfd, ".dynsym");
2740 d->this_hdr.sh_link = elf_section_data (s)->this_idx;
2744 d->this_hdr.sh_link = t->symtab_section;
2748 for (secn = 1; secn < section_number; ++secn)
2749 if (i_shdrp[secn] == NULL)
2750 i_shdrp[secn] = i_shdrp[0];
2752 i_shdrp[secn]->sh_name = _bfd_elf_strtab_offset (elf_shstrtab (abfd),
2753 i_shdrp[secn]->sh_name);
2757 /* Map symbol from it's internal number to the external number, moving
2758 all local symbols to be at the head of the list. */
2761 sym_is_global (abfd, sym)
2765 /* If the backend has a special mapping, use it. */
2766 if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2767 return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
2770 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2771 || bfd_is_und_section (bfd_get_section (sym))
2772 || bfd_is_com_section (bfd_get_section (sym)));
2776 elf_map_symbols (abfd)
2779 unsigned int symcount = bfd_get_symcount (abfd);
2780 asymbol **syms = bfd_get_outsymbols (abfd);
2781 asymbol **sect_syms;
2782 unsigned int num_locals = 0;
2783 unsigned int num_globals = 0;
2784 unsigned int num_locals2 = 0;
2785 unsigned int num_globals2 = 0;
2793 fprintf (stderr, "elf_map_symbols\n");
2797 for (asect = abfd->sections; asect; asect = asect->next)
2799 if (max_index < asect->index)
2800 max_index = asect->index;
2804 amt = max_index * sizeof (asymbol *);
2805 sect_syms = (asymbol **) bfd_zalloc (abfd, amt);
2806 if (sect_syms == NULL)
2808 elf_section_syms (abfd) = sect_syms;
2809 elf_num_section_syms (abfd) = max_index;
2811 /* Init sect_syms entries for any section symbols we have already
2812 decided to output. */
2813 for (idx = 0; idx < symcount; idx++)
2815 asymbol *sym = syms[idx];
2817 if ((sym->flags & BSF_SECTION_SYM) != 0
2824 if (sec->owner != NULL)
2826 if (sec->owner != abfd)
2828 if (sec->output_offset != 0)
2831 sec = sec->output_section;
2833 /* Empty sections in the input files may have had a
2834 section symbol created for them. (See the comment
2835 near the end of _bfd_generic_link_output_symbols in
2836 linker.c). If the linker script discards such
2837 sections then we will reach this point. Since we know
2838 that we cannot avoid this case, we detect it and skip
2839 the abort and the assignment to the sect_syms array.
2840 To reproduce this particular case try running the
2841 linker testsuite test ld-scripts/weak.exp for an ELF
2842 port that uses the generic linker. */
2843 if (sec->owner == NULL)
2846 BFD_ASSERT (sec->owner == abfd);
2848 sect_syms[sec->index] = syms[idx];
2853 /* Classify all of the symbols. */
2854 for (idx = 0; idx < symcount; idx++)
2856 if (!sym_is_global (abfd, syms[idx]))
2862 /* We will be adding a section symbol for each BFD section. Most normal
2863 sections will already have a section symbol in outsymbols, but
2864 eg. SHT_GROUP sections will not, and we need the section symbol mapped
2865 at least in that case. */
2866 for (asect = abfd->sections; asect; asect = asect->next)
2868 if (sect_syms[asect->index] == NULL)
2870 if (!sym_is_global (abfd, asect->symbol))
2877 /* Now sort the symbols so the local symbols are first. */
2878 amt = (num_locals + num_globals) * sizeof (asymbol *);
2879 new_syms = (asymbol **) bfd_alloc (abfd, amt);
2881 if (new_syms == NULL)
2884 for (idx = 0; idx < symcount; idx++)
2886 asymbol *sym = syms[idx];
2889 if (!sym_is_global (abfd, sym))
2892 i = num_locals + num_globals2++;
2894 sym->udata.i = i + 1;
2896 for (asect = abfd->sections; asect; asect = asect->next)
2898 if (sect_syms[asect->index] == NULL)
2900 asymbol *sym = asect->symbol;
2903 sect_syms[asect->index] = sym;
2904 if (!sym_is_global (abfd, sym))
2907 i = num_locals + num_globals2++;
2909 sym->udata.i = i + 1;
2913 bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
2915 elf_num_locals (abfd) = num_locals;
2916 elf_num_globals (abfd) = num_globals;
2920 /* Align to the maximum file alignment that could be required for any
2921 ELF data structure. */
2923 static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
2924 static INLINE file_ptr
2925 align_file_position (off, align)
2929 return (off + align - 1) & ~(align - 1);
2932 /* Assign a file position to a section, optionally aligning to the
2933 required section alignment. */
2936 _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
2937 Elf_Internal_Shdr *i_shdrp;
2945 al = i_shdrp->sh_addralign;
2947 offset = BFD_ALIGN (offset, al);
2949 i_shdrp->sh_offset = offset;
2950 if (i_shdrp->bfd_section != NULL)
2951 i_shdrp->bfd_section->filepos = offset;
2952 if (i_shdrp->sh_type != SHT_NOBITS)
2953 offset += i_shdrp->sh_size;
2957 /* Compute the file positions we are going to put the sections at, and
2958 otherwise prepare to begin writing out the ELF file. If LINK_INFO
2959 is not NULL, this is being called by the ELF backend linker. */
2962 _bfd_elf_compute_section_file_positions (abfd, link_info)
2964 struct bfd_link_info *link_info;
2966 struct elf_backend_data *bed = get_elf_backend_data (abfd);
2968 struct bfd_strtab_hash *strtab;
2969 Elf_Internal_Shdr *shstrtab_hdr;
2971 if (abfd->output_has_begun)
2974 /* Do any elf backend specific processing first. */
2975 if (bed->elf_backend_begin_write_processing)
2976 (*bed->elf_backend_begin_write_processing) (abfd, link_info);
2978 if (! prep_headers (abfd))
2981 /* Post process the headers if necessary. */
2982 if (bed->elf_backend_post_process_headers)
2983 (*bed->elf_backend_post_process_headers) (abfd, link_info);
2986 bfd_map_over_sections (abfd, elf_fake_sections, &failed);
2990 if (!assign_section_numbers (abfd))
2993 /* The backend linker builds symbol table information itself. */
2994 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
2996 /* Non-zero if doing a relocatable link. */
2997 int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
2999 if (! swap_out_syms (abfd, &strtab, relocatable_p))
3003 if (link_info == NULL)
3005 bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed);
3010 shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
3011 /* sh_name was set in prep_headers. */
3012 shstrtab_hdr->sh_type = SHT_STRTAB;
3013 shstrtab_hdr->sh_flags = 0;
3014 shstrtab_hdr->sh_addr = 0;
3015 shstrtab_hdr->sh_size = _bfd_elf_strtab_size (elf_shstrtab (abfd));
3016 shstrtab_hdr->sh_entsize = 0;
3017 shstrtab_hdr->sh_link = 0;
3018 shstrtab_hdr->sh_info = 0;
3019 /* sh_offset is set in assign_file_positions_except_relocs. */
3020 shstrtab_hdr->sh_addralign = 1;
3022 if (!assign_file_positions_except_relocs (abfd))
3025 if (link_info == NULL && bfd_get_symcount (abfd) > 0)
3028 Elf_Internal_Shdr *hdr;
3030 off = elf_tdata (abfd)->next_file_pos;
3032 hdr = &elf_tdata (abfd)->symtab_hdr;
3033 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3035 hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
3036 if (hdr->sh_size != 0)
3037 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3039 hdr = &elf_tdata (abfd)->strtab_hdr;
3040 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
3042 elf_tdata (abfd)->next_file_pos = off;
3044 /* Now that we know where the .strtab section goes, write it
3046 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
3047 || ! _bfd_stringtab_emit (abfd, strtab))
3049 _bfd_stringtab_free (strtab);
3052 abfd->output_has_begun = true;
3057 /* Create a mapping from a set of sections to a program segment. */
3059 static INLINE struct elf_segment_map *
3060 make_mapping (abfd, sections, from, to, phdr)
3062 asection **sections;
3067 struct elf_segment_map *m;
3072 amt = sizeof (struct elf_segment_map);
3073 amt += (to - from - 1) * sizeof (asection *);
3074 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3078 m->p_type = PT_LOAD;
3079 for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
3080 m->sections[i - from] = *hdrpp;
3081 m->count = to - from;
3083 if (from == 0 && phdr)
3085 /* Include the headers in the first PT_LOAD segment. */
3086 m->includes_filehdr = 1;
3087 m->includes_phdrs = 1;
3093 /* Set up a mapping from BFD sections to program segments. */
3096 map_sections_to_segments (abfd)
3099 asection **sections = NULL;
3103 struct elf_segment_map *mfirst;
3104 struct elf_segment_map **pm;
3105 struct elf_segment_map *m;
3107 unsigned int phdr_index;
3108 bfd_vma maxpagesize;
3110 boolean phdr_in_segment = true;
3113 asection *first_tls = NULL;
3114 asection *dynsec, *eh_frame_hdr;
3117 if (elf_tdata (abfd)->segment_map != NULL)
3120 if (bfd_count_sections (abfd) == 0)
3123 /* Select the allocated sections, and sort them. */
3125 amt = bfd_count_sections (abfd) * sizeof (asection *);
3126 sections = (asection **) bfd_malloc (amt);
3127 if (sections == NULL)
3131 for (s = abfd->sections; s != NULL; s = s->next)
3133 if ((s->flags & SEC_ALLOC) != 0)
3139 BFD_ASSERT (i <= bfd_count_sections (abfd));
3142 qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
3144 /* Build the mapping. */
3149 /* If we have a .interp section, then create a PT_PHDR segment for
3150 the program headers and a PT_INTERP segment for the .interp
3152 s = bfd_get_section_by_name (abfd, ".interp");
3153 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3155 amt = sizeof (struct elf_segment_map);
3156 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3160 m->p_type = PT_PHDR;
3161 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3162 m->p_flags = PF_R | PF_X;
3163 m->p_flags_valid = 1;
3164 m->includes_phdrs = 1;
3169 amt = sizeof (struct elf_segment_map);
3170 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3174 m->p_type = PT_INTERP;
3182 /* Look through the sections. We put sections in the same program
3183 segment when the start of the second section can be placed within
3184 a few bytes of the end of the first section. */
3187 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3189 dynsec = bfd_get_section_by_name (abfd, ".dynamic");
3191 && (dynsec->flags & SEC_LOAD) == 0)
3194 /* Deal with -Ttext or something similar such that the first section
3195 is not adjacent to the program headers. This is an
3196 approximation, since at this point we don't know exactly how many
3197 program headers we will need. */
3200 bfd_size_type phdr_size;
3202 phdr_size = elf_tdata (abfd)->program_header_size;
3204 phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
3205 if ((abfd->flags & D_PAGED) == 0
3206 || sections[0]->lma < phdr_size
3207 || sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
3208 phdr_in_segment = false;
3211 for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
3214 boolean new_segment;
3218 /* See if this section and the last one will fit in the same
3221 if (last_hdr == NULL)
3223 /* If we don't have a segment yet, then we don't need a new
3224 one (we build the last one after this loop). */
3225 new_segment = false;
3227 else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
3229 /* If this section has a different relation between the
3230 virtual address and the load address, then we need a new
3234 else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3235 < BFD_ALIGN (hdr->lma, maxpagesize))
3237 /* If putting this section in this segment would force us to
3238 skip a page in the segment, then we need a new segment. */
3241 else if ((last_hdr->flags & SEC_LOAD) == 0
3242 && (hdr->flags & SEC_LOAD) != 0)
3244 /* We don't want to put a loadable section after a
3245 nonloadable section in the same segment. */
3248 else if ((abfd->flags & D_PAGED) == 0)
3250 /* If the file is not demand paged, which means that we
3251 don't require the sections to be correctly aligned in the
3252 file, then there is no other reason for a new segment. */
3253 new_segment = false;
3256 && (hdr->flags & SEC_READONLY) == 0
3257 && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
3260 /* We don't want to put a writable section in a read only
3261 segment, unless they are on the same page in memory
3262 anyhow. We already know that the last section does not
3263 bring us past the current section on the page, so the
3264 only case in which the new section is not on the same
3265 page as the previous section is when the previous section
3266 ends precisely on a page boundary. */
3271 /* Otherwise, we can use the same segment. */
3272 new_segment = false;
3277 if ((hdr->flags & SEC_READONLY) == 0)
3283 /* We need a new program segment. We must create a new program
3284 header holding all the sections from phdr_index until hdr. */
3286 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3293 if ((hdr->flags & SEC_READONLY) == 0)
3300 phdr_in_segment = false;
3303 /* Create a final PT_LOAD program segment. */
3304 if (last_hdr != NULL)
3306 m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
3314 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3317 amt = sizeof (struct elf_segment_map);
3318 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3322 m->p_type = PT_DYNAMIC;
3324 m->sections[0] = dynsec;
3330 /* For each loadable .note section, add a PT_NOTE segment. We don't
3331 use bfd_get_section_by_name, because if we link together
3332 nonloadable .note sections and loadable .note sections, we will
3333 generate two .note sections in the output file. FIXME: Using
3334 names for section types is bogus anyhow. */
3335 for (s = abfd->sections; s != NULL; s = s->next)
3337 if ((s->flags & SEC_LOAD) != 0
3338 && strncmp (s->name, ".note", 5) == 0)
3340 amt = sizeof (struct elf_segment_map);
3341 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3345 m->p_type = PT_NOTE;
3352 if (s->flags & SEC_THREAD_LOCAL)
3360 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3365 amt = sizeof (struct elf_segment_map);
3366 amt += (tls_count - 1) * sizeof (asection *);
3367 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3372 m->count = tls_count;
3373 /* Mandated PF_R. */
3375 m->p_flags_valid = 1;
3376 for (i = 0; i < tls_count; ++i)
3378 BFD_ASSERT (first_tls->flags & SEC_THREAD_LOCAL);
3379 m->sections[i] = first_tls;
3380 first_tls = first_tls->next;
3387 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3389 eh_frame_hdr = NULL;
3390 if (elf_tdata (abfd)->eh_frame_hdr)
3391 eh_frame_hdr = bfd_get_section_by_name (abfd, ".eh_frame_hdr");
3392 if (eh_frame_hdr != NULL && (eh_frame_hdr->flags & SEC_LOAD))
3394 amt = sizeof (struct elf_segment_map);
3395 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
3399 m->p_type = PT_GNU_EH_FRAME;
3401 m->sections[0] = eh_frame_hdr;
3410 elf_tdata (abfd)->segment_map = mfirst;
3414 if (sections != NULL)
3419 /* Sort sections by address. */
3422 elf_sort_sections (arg1, arg2)
3426 const asection *sec1 = *(const asection **) arg1;
3427 const asection *sec2 = *(const asection **) arg2;
3429 /* Sort by LMA first, since this is the address used to
3430 place the section into a segment. */
3431 if (sec1->lma < sec2->lma)
3433 else if (sec1->lma > sec2->lma)
3436 /* Then sort by VMA. Normally the LMA and the VMA will be
3437 the same, and this will do nothing. */
3438 if (sec1->vma < sec2->vma)
3440 else if (sec1->vma > sec2->vma)
3443 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3445 #define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
3451 /* If the indicies are the same, do not return 0
3452 here, but continue to try the next comparison. */
3453 if (sec1->target_index - sec2->target_index != 0)
3454 return sec1->target_index - sec2->target_index;
3459 else if (TOEND (sec2))
3464 /* Sort by size, to put zero sized sections
3465 before others at the same address. */
3467 if (sec1->_raw_size < sec2->_raw_size)
3469 if (sec1->_raw_size > sec2->_raw_size)
3472 return sec1->target_index - sec2->target_index;
3475 /* Assign file positions to the sections based on the mapping from
3476 sections to segments. This function also sets up some fields in
3477 the file header, and writes out the program headers. */
3480 assign_file_positions_for_segments (abfd)
3483 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3485 struct elf_segment_map *m;
3487 Elf_Internal_Phdr *phdrs;
3489 bfd_vma filehdr_vaddr, filehdr_paddr;
3490 bfd_vma phdrs_vaddr, phdrs_paddr;
3491 Elf_Internal_Phdr *p;
3494 if (elf_tdata (abfd)->segment_map == NULL)
3496 if (! map_sections_to_segments (abfd))
3501 /* The placement algorithm assumes that non allocated sections are
3502 not in PT_LOAD segments. We ensure this here by removing such
3503 sections from the segment map. */
3504 for (m = elf_tdata (abfd)->segment_map;
3508 unsigned int new_count;
3511 if (m->p_type != PT_LOAD)
3515 for (i = 0; i < m->count; i ++)
3517 if ((m->sections[i]->flags & SEC_ALLOC) != 0)
3520 m->sections[new_count] = m->sections[i];
3526 if (new_count != m->count)
3527 m->count = new_count;
3531 if (bed->elf_backend_modify_segment_map)
3533 if (! (*bed->elf_backend_modify_segment_map) (abfd))
3538 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3541 elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
3542 elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
3543 elf_elfheader (abfd)->e_phnum = count;
3548 /* If we already counted the number of program segments, make sure
3549 that we allocated enough space. This happens when SIZEOF_HEADERS
3550 is used in a linker script. */
3551 alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
3552 if (alloc != 0 && count > alloc)
3554 ((*_bfd_error_handler)
3555 (_("%s: Not enough room for program headers (allocated %u, need %u)"),
3556 bfd_get_filename (abfd), alloc, count));
3557 bfd_set_error (bfd_error_bad_value);
3564 amt = alloc * sizeof (Elf_Internal_Phdr);
3565 phdrs = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
3569 off = bed->s->sizeof_ehdr;
3570 off += alloc * bed->s->sizeof_phdr;
3577 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3584 /* If elf_segment_map is not from map_sections_to_segments, the
3585 sections may not be correctly ordered. NOTE: sorting should
3586 not be done to the PT_NOTE section of a corefile, which may
3587 contain several pseudo-sections artificially created by bfd.
3588 Sorting these pseudo-sections breaks things badly. */
3590 && !(elf_elfheader (abfd)->e_type == ET_CORE
3591 && m->p_type == PT_NOTE))
3592 qsort (m->sections, (size_t) m->count, sizeof (asection *),
3595 p->p_type = m->p_type;
3596 p->p_flags = m->p_flags;
3598 if (p->p_type == PT_LOAD
3600 && (m->sections[0]->flags & SEC_ALLOC) != 0)
3602 if ((abfd->flags & D_PAGED) != 0)
3603 off += (m->sections[0]->vma - off) % bed->maxpagesize;
3606 bfd_size_type align;
3609 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3611 bfd_size_type secalign;
3613 secalign = bfd_get_section_alignment (abfd, *secpp);
3614 if (secalign > align)
3618 off += (m->sections[0]->vma - off) % (1 << align);
3625 p->p_vaddr = m->sections[0]->vma;
3627 if (m->p_paddr_valid)
3628 p->p_paddr = m->p_paddr;
3629 else if (m->count == 0)
3632 p->p_paddr = m->sections[0]->lma;
3634 if (p->p_type == PT_LOAD
3635 && (abfd->flags & D_PAGED) != 0)
3636 p->p_align = bed->maxpagesize;
3637 else if (m->count == 0)
3638 p->p_align = bed->s->file_align;
3646 if (m->includes_filehdr)
3648 if (! m->p_flags_valid)
3651 p->p_filesz = bed->s->sizeof_ehdr;
3652 p->p_memsz = bed->s->sizeof_ehdr;
3655 BFD_ASSERT (p->p_type == PT_LOAD);
3657 if (p->p_vaddr < (bfd_vma) off)
3659 (*_bfd_error_handler)
3660 (_("%s: Not enough room for program headers, try linking with -N"),
3661 bfd_get_filename (abfd));
3662 bfd_set_error (bfd_error_bad_value);
3667 if (! m->p_paddr_valid)
3670 if (p->p_type == PT_LOAD)
3672 filehdr_vaddr = p->p_vaddr;
3673 filehdr_paddr = p->p_paddr;
3677 if (m->includes_phdrs)
3679 if (! m->p_flags_valid)
3682 if (m->includes_filehdr)
3684 if (p->p_type == PT_LOAD)
3686 phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
3687 phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
3692 p->p_offset = bed->s->sizeof_ehdr;
3696 BFD_ASSERT (p->p_type == PT_LOAD);
3697 p->p_vaddr -= off - p->p_offset;
3698 if (! m->p_paddr_valid)
3699 p->p_paddr -= off - p->p_offset;
3702 if (p->p_type == PT_LOAD)
3704 phdrs_vaddr = p->p_vaddr;
3705 phdrs_paddr = p->p_paddr;
3708 phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
3711 p->p_filesz += alloc * bed->s->sizeof_phdr;
3712 p->p_memsz += alloc * bed->s->sizeof_phdr;
3715 if (p->p_type == PT_LOAD
3716 || (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
3718 if (! m->includes_filehdr && ! m->includes_phdrs)
3724 adjust = off - (p->p_offset + p->p_filesz);
3725 p->p_filesz += adjust;
3726 p->p_memsz += adjust;
3732 for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
3736 bfd_size_type align;
3740 align = 1 << bfd_get_section_alignment (abfd, sec);
3742 /* The section may have artificial alignment forced by a
3743 link script. Notice this case by the gap between the
3744 cumulative phdr lma and the section's lma. */
3745 if (p->p_paddr + p->p_memsz < sec->lma)
3747 bfd_vma adjust = sec->lma - (p->p_paddr + p->p_memsz);
3749 p->p_memsz += adjust;
3752 if ((flags & SEC_LOAD) != 0)
3753 p->p_filesz += adjust;
3756 if (p->p_type == PT_LOAD)
3758 bfd_signed_vma adjust;
3760 if ((flags & SEC_LOAD) != 0)
3762 adjust = sec->lma - (p->p_paddr + p->p_memsz);
3766 else if ((flags & SEC_ALLOC) != 0)
3768 /* The section VMA must equal the file position
3769 modulo the page size. FIXME: I'm not sure if
3770 this adjustment is really necessary. We used to
3771 not have the SEC_LOAD case just above, and then
3772 this was necessary, but now I'm not sure. */
3773 if ((abfd->flags & D_PAGED) != 0)
3774 adjust = (sec->vma - voff) % bed->maxpagesize;
3776 adjust = (sec->vma - voff) % align;
3785 (* _bfd_error_handler) (_("\
3786 Error: First section in segment (%s) starts at 0x%x whereas the segment starts at 0x%x"),
3787 bfd_section_name (abfd, sec),
3792 p->p_memsz += adjust;
3795 if ((flags & SEC_LOAD) != 0)
3796 p->p_filesz += adjust;
3801 /* We check SEC_HAS_CONTENTS here because if NOLOAD is
3802 used in a linker script we may have a section with
3803 SEC_LOAD clear but which is supposed to have
3805 if ((flags & SEC_LOAD) != 0
3806 || (flags & SEC_HAS_CONTENTS) != 0)
3807 off += sec->_raw_size;
3809 if ((flags & SEC_ALLOC) != 0)
3810 voff += sec->_raw_size;
3813 if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
3815 /* The actual "note" segment has i == 0.
3816 This is the one that actually contains everything. */
3820 p->p_filesz = sec->_raw_size;
3821 off += sec->_raw_size;
3826 /* Fake sections -- don't need to be written. */
3829 flags = sec->flags = 0;
3836 p->p_memsz += sec->_raw_size;
3838 if ((flags & SEC_LOAD) != 0)
3839 p->p_filesz += sec->_raw_size;
3841 if (p->p_type == PT_TLS
3842 && sec->_raw_size == 0
3843 && (sec->flags & SEC_HAS_CONTENTS) == 0)
3845 struct bfd_link_order *o;
3846 bfd_vma tbss_size = 0;
3848 for (o = sec->link_order_head; o != NULL; o = o->next)
3849 if (tbss_size < o->offset + o->size)
3850 tbss_size = o->offset + o->size;
3852 p->p_memsz += tbss_size;
3855 if (align > p->p_align
3856 && (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
3860 if (! m->p_flags_valid)
3863 if ((flags & SEC_CODE) != 0)
3865 if ((flags & SEC_READONLY) == 0)
3871 /* Now that we have set the section file positions, we can set up
3872 the file positions for the non PT_LOAD segments. */
3873 for (m = elf_tdata (abfd)->segment_map, p = phdrs;
3877 if (p->p_type != PT_LOAD && m->count > 0)
3879 BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
3880 p->p_offset = m->sections[0]->filepos;
3884 if (m->includes_filehdr)
3886 p->p_vaddr = filehdr_vaddr;
3887 if (! m->p_paddr_valid)
3888 p->p_paddr = filehdr_paddr;
3890 else if (m->includes_phdrs)
3892 p->p_vaddr = phdrs_vaddr;
3893 if (! m->p_paddr_valid)
3894 p->p_paddr = phdrs_paddr;
3899 /* If additional nonloadable filepos adjustments are required,
3901 if (bed->set_nonloadable_filepos)
3902 (*bed->set_nonloadable_filepos) (abfd, phdrs);
3904 /* Clear out any program headers we allocated but did not use. */
3905 for (; count < alloc; count++, p++)
3907 memset (p, 0, sizeof *p);
3908 p->p_type = PT_NULL;
3911 elf_tdata (abfd)->phdr = phdrs;
3913 elf_tdata (abfd)->next_file_pos = off;
3915 /* Write out the program headers. */
3916 if (bfd_seek (abfd, (bfd_signed_vma) bed->s->sizeof_ehdr, SEEK_SET) != 0
3917 || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
3923 /* Get the size of the program header.
3925 If this is called by the linker before any of the section VMA's are set, it
3926 can't calculate the correct value for a strange memory layout. This only
3927 happens when SIZEOF_HEADERS is used in a linker script. In this case,
3928 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
3929 data segment (exclusive of .interp and .dynamic).
3931 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
3932 will be two segments. */
3934 static bfd_size_type
3935 get_program_header_size (abfd)
3940 struct elf_backend_data *bed = get_elf_backend_data (abfd);
3942 /* We can't return a different result each time we're called. */
3943 if (elf_tdata (abfd)->program_header_size != 0)
3944 return elf_tdata (abfd)->program_header_size;
3946 if (elf_tdata (abfd)->segment_map != NULL)
3948 struct elf_segment_map *m;
3951 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
3953 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
3954 return elf_tdata (abfd)->program_header_size;
3957 /* Assume we will need exactly two PT_LOAD segments: one for text
3958 and one for data. */
3961 s = bfd_get_section_by_name (abfd, ".interp");
3962 if (s != NULL && (s->flags & SEC_LOAD) != 0)
3964 /* If we have a loadable interpreter section, we need a
3965 PT_INTERP segment. In this case, assume we also need a
3966 PT_PHDR segment, although that may not be true for all
3971 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
3973 /* We need a PT_DYNAMIC segment. */
3977 if (elf_tdata (abfd)->eh_frame_hdr
3978 && bfd_get_section_by_name (abfd, ".eh_frame_hdr") != NULL)
3980 /* We need a PT_GNU_EH_FRAME segment. */
3984 for (s = abfd->sections; s != NULL; s = s->next)
3986 if ((s->flags & SEC_LOAD) != 0
3987 && strncmp (s->name, ".note", 5) == 0)
3989 /* We need a PT_NOTE segment. */
3994 for (s = abfd->sections; s != NULL; s = s->next)
3996 if (s->flags & SEC_THREAD_LOCAL)
3998 /* We need a PT_TLS segment. */
4004 /* Let the backend count up any program headers it might need. */
4005 if (bed->elf_backend_additional_program_headers)
4009 a = (*bed->elf_backend_additional_program_headers) (abfd);
4015 elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
4016 return elf_tdata (abfd)->program_header_size;
4019 /* Work out the file positions of all the sections. This is called by
4020 _bfd_elf_compute_section_file_positions. All the section sizes and
4021 VMAs must be known before this is called.
4023 We do not consider reloc sections at this point, unless they form
4024 part of the loadable image. Reloc sections are assigned file
4025 positions in assign_file_positions_for_relocs, which is called by
4026 write_object_contents and final_link.
4028 We also don't set the positions of the .symtab and .strtab here. */
4031 assign_file_positions_except_relocs (abfd)
4034 struct elf_obj_tdata * const tdata = elf_tdata (abfd);
4035 Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
4036 Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
4037 unsigned int num_sec = elf_numsections (abfd);
4039 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4041 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
4042 && bfd_get_format (abfd) != bfd_core)
4044 Elf_Internal_Shdr **hdrpp;
4047 /* Start after the ELF header. */
4048 off = i_ehdrp->e_ehsize;
4050 /* We are not creating an executable, which means that we are
4051 not creating a program header, and that the actual order of
4052 the sections in the file is unimportant. */
4053 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4055 Elf_Internal_Shdr *hdr;
4058 if (hdr->sh_type == SHT_REL
4059 || hdr->sh_type == SHT_RELA
4060 || i == tdata->symtab_section
4061 || i == tdata->symtab_shndx_section
4062 || i == tdata->strtab_section)
4064 hdr->sh_offset = -1;
4067 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
4069 if (i == SHN_LORESERVE - 1)
4071 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4072 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4079 Elf_Internal_Shdr **hdrpp;
4081 /* Assign file positions for the loaded sections based on the
4082 assignment of sections to segments. */
4083 if (! assign_file_positions_for_segments (abfd))
4086 /* Assign file positions for the other sections. */
4088 off = elf_tdata (abfd)->next_file_pos;
4089 for (i = 1, hdrpp = i_shdrpp + 1; i < num_sec; i++, hdrpp++)
4091 Elf_Internal_Shdr *hdr;
4094 if (hdr->bfd_section != NULL
4095 && hdr->bfd_section->filepos != 0)
4096 hdr->sh_offset = hdr->bfd_section->filepos;
4097 else if ((hdr->sh_flags & SHF_ALLOC) != 0)
4099 ((*_bfd_error_handler)
4100 (_("%s: warning: allocated section `%s' not in segment"),
4101 bfd_get_filename (abfd),
4102 (hdr->bfd_section == NULL
4104 : hdr->bfd_section->name)));
4105 if ((abfd->flags & D_PAGED) != 0)
4106 off += (hdr->sh_addr - off) % bed->maxpagesize;
4108 off += (hdr->sh_addr - off) % hdr->sh_addralign;
4109 off = _bfd_elf_assign_file_position_for_section (hdr, off,
4112 else if (hdr->sh_type == SHT_REL
4113 || hdr->sh_type == SHT_RELA
4114 || hdr == i_shdrpp[tdata->symtab_section]
4115 || hdr == i_shdrpp[tdata->symtab_shndx_section]
4116 || hdr == i_shdrpp[tdata->strtab_section])
4117 hdr->sh_offset = -1;
4119 off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
4121 if (i == SHN_LORESERVE - 1)
4123 i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4124 hdrpp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4129 /* Place the section headers. */
4130 off = align_file_position (off, bed->s->file_align);
4131 i_ehdrp->e_shoff = off;
4132 off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
4134 elf_tdata (abfd)->next_file_pos = off;
4143 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
4144 Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
4145 Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
4146 struct elf_strtab_hash *shstrtab;
4147 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4149 i_ehdrp = elf_elfheader (abfd);
4150 i_shdrp = elf_elfsections (abfd);
4152 shstrtab = _bfd_elf_strtab_init ();
4153 if (shstrtab == NULL)
4156 elf_shstrtab (abfd) = shstrtab;
4158 i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
4159 i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
4160 i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
4161 i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
4163 i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
4164 i_ehdrp->e_ident[EI_DATA] =
4165 bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
4166 i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
4168 if ((abfd->flags & DYNAMIC) != 0)
4169 i_ehdrp->e_type = ET_DYN;
4170 else if ((abfd->flags & EXEC_P) != 0)
4171 i_ehdrp->e_type = ET_EXEC;
4172 else if (bfd_get_format (abfd) == bfd_core)
4173 i_ehdrp->e_type = ET_CORE;
4175 i_ehdrp->e_type = ET_REL;
4177 switch (bfd_get_arch (abfd))
4179 case bfd_arch_unknown:
4180 i_ehdrp->e_machine = EM_NONE;
4183 /* There used to be a long list of cases here, each one setting
4184 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4185 in the corresponding bfd definition. To avoid duplication,
4186 the switch was removed. Machines that need special handling
4187 can generally do it in elf_backend_final_write_processing(),
4188 unless they need the information earlier than the final write.
4189 Such need can generally be supplied by replacing the tests for
4190 e_machine with the conditions used to determine it. */
4192 if (get_elf_backend_data (abfd) != NULL)
4193 i_ehdrp->e_machine = get_elf_backend_data (abfd)->elf_machine_code;
4195 i_ehdrp->e_machine = EM_NONE;
4198 i_ehdrp->e_version = bed->s->ev_current;
4199 i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
4201 /* No program header, for now. */
4202 i_ehdrp->e_phoff = 0;
4203 i_ehdrp->e_phentsize = 0;
4204 i_ehdrp->e_phnum = 0;
4206 /* Each bfd section is section header entry. */
4207 i_ehdrp->e_entry = bfd_get_start_address (abfd);
4208 i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
4210 /* If we're building an executable, we'll need a program header table. */
4211 if (abfd->flags & EXEC_P)
4213 /* It all happens later. */
4215 i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
4217 /* elf_build_phdrs() returns a (NULL-terminated) array of
4218 Elf_Internal_Phdrs. */
4219 i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
4220 i_ehdrp->e_phoff = outbase;
4221 outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
4226 i_ehdrp->e_phentsize = 0;
4228 i_ehdrp->e_phoff = 0;
4231 elf_tdata (abfd)->symtab_hdr.sh_name =
4232 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".symtab", false);
4233 elf_tdata (abfd)->strtab_hdr.sh_name =
4234 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".strtab", false);
4235 elf_tdata (abfd)->shstrtab_hdr.sh_name =
4236 (unsigned int) _bfd_elf_strtab_add (shstrtab, ".shstrtab", false);
4237 if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4238 || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
4239 || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
4245 /* Assign file positions for all the reloc sections which are not part
4246 of the loadable file image. */
4249 _bfd_elf_assign_file_positions_for_relocs (abfd)
4253 unsigned int i, num_sec;
4254 Elf_Internal_Shdr **shdrpp;
4256 off = elf_tdata (abfd)->next_file_pos;
4258 num_sec = elf_numsections (abfd);
4259 for (i = 1, shdrpp = elf_elfsections (abfd) + 1; i < num_sec; i++, shdrpp++)
4261 Elf_Internal_Shdr *shdrp;
4264 if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
4265 && shdrp->sh_offset == -1)
4266 off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
4269 elf_tdata (abfd)->next_file_pos = off;
4273 _bfd_elf_write_object_contents (abfd)
4276 struct elf_backend_data *bed = get_elf_backend_data (abfd);
4277 Elf_Internal_Ehdr *i_ehdrp;
4278 Elf_Internal_Shdr **i_shdrp;
4280 unsigned int count, num_sec;
4282 if (! abfd->output_has_begun
4283 && ! _bfd_elf_compute_section_file_positions
4284 (abfd, (struct bfd_link_info *) NULL))
4287 i_shdrp = elf_elfsections (abfd);
4288 i_ehdrp = elf_elfheader (abfd);
4291 bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
4295 _bfd_elf_assign_file_positions_for_relocs (abfd);
4297 /* After writing the headers, we need to write the sections too... */
4298 num_sec = elf_numsections (abfd);
4299 for (count = 1; count < num_sec; count++)
4301 if (bed->elf_backend_section_processing)
4302 (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
4303 if (i_shdrp[count]->contents)
4305 bfd_size_type amt = i_shdrp[count]->sh_size;
4307 if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
4308 || bfd_bwrite (i_shdrp[count]->contents, amt, abfd) != amt)
4311 if (count == SHN_LORESERVE - 1)
4312 count += SHN_HIRESERVE + 1 - SHN_LORESERVE;
4315 /* Write out the section header names. */
4316 if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
4317 || ! _bfd_elf_strtab_emit (abfd, elf_shstrtab (abfd)))
4320 if (bed->elf_backend_final_write_processing)
4321 (*bed->elf_backend_final_write_processing) (abfd,
4322 elf_tdata (abfd)->linker);
4324 return bed->s->write_shdrs_and_ehdr (abfd);
4328 _bfd_elf_write_corefile_contents (abfd)
4331 /* Hopefully this can be done just like an object file. */
4332 return _bfd_elf_write_object_contents (abfd);
4335 /* Given a section, search the header to find them. */
4338 _bfd_elf_section_from_bfd_section (abfd, asect)
4342 struct elf_backend_data *bed;
4345 if (elf_section_data (asect) != NULL
4346 && elf_section_data (asect)->this_idx != 0)
4347 return elf_section_data (asect)->this_idx;
4349 if (bfd_is_abs_section (asect))
4351 else if (bfd_is_com_section (asect))
4353 else if (bfd_is_und_section (asect))
4357 Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
4358 int maxindex = elf_numsections (abfd);
4360 for (index = 1; index < maxindex; index++)
4362 Elf_Internal_Shdr *hdr = i_shdrp[index];
4364 if (hdr != NULL && hdr->bfd_section == asect)
4370 bed = get_elf_backend_data (abfd);
4371 if (bed->elf_backend_section_from_bfd_section)
4375 if ((*bed->elf_backend_section_from_bfd_section) (abfd, asect, &retval))
4380 bfd_set_error (bfd_error_nonrepresentable_section);
4385 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4389 _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
4391 asymbol **asym_ptr_ptr;
4393 asymbol *asym_ptr = *asym_ptr_ptr;
4395 flagword flags = asym_ptr->flags;
4397 /* When gas creates relocations against local labels, it creates its
4398 own symbol for the section, but does put the symbol into the
4399 symbol chain, so udata is 0. When the linker is generating
4400 relocatable output, this section symbol may be for one of the
4401 input sections rather than the output section. */
4402 if (asym_ptr->udata.i == 0
4403 && (flags & BSF_SECTION_SYM)
4404 && asym_ptr->section)
4408 if (asym_ptr->section->output_section != NULL)
4409 indx = asym_ptr->section->output_section->index;
4411 indx = asym_ptr->section->index;
4412 if (indx < elf_num_section_syms (abfd)
4413 && elf_section_syms (abfd)[indx] != NULL)
4414 asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
4417 idx = asym_ptr->udata.i;
4421 /* This case can occur when using --strip-symbol on a symbol
4422 which is used in a relocation entry. */
4423 (*_bfd_error_handler)
4424 (_("%s: symbol `%s' required but not present"),
4425 bfd_archive_filename (abfd), bfd_asymbol_name (asym_ptr));
4426 bfd_set_error (bfd_error_no_symbols);
4433 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
4434 (long) asym_ptr, asym_ptr->name, idx, flags,
4435 elf_symbol_flags (flags));
4443 /* Copy private BFD data. This copies any program header information. */
4446 copy_private_bfd_data (ibfd, obfd)
4450 Elf_Internal_Ehdr * iehdr;
4451 struct elf_segment_map * map;
4452 struct elf_segment_map * map_first;
4453 struct elf_segment_map ** pointer_to_map;
4454 Elf_Internal_Phdr * segment;
4457 unsigned int num_segments;
4458 boolean phdr_included = false;
4459 bfd_vma maxpagesize;
4460 struct elf_segment_map * phdr_adjust_seg = NULL;
4461 unsigned int phdr_adjust_num = 0;
4462 struct elf_backend_data * bed;
4464 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4465 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4468 if (elf_tdata (ibfd)->phdr == NULL)
4471 bed = get_elf_backend_data (ibfd);
4472 iehdr = elf_elfheader (ibfd);
4475 pointer_to_map = &map_first;
4477 num_segments = elf_elfheader (ibfd)->e_phnum;
4478 maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
4480 /* Returns the end address of the segment + 1. */
4481 #define SEGMENT_END(segment, start) \
4482 (start + (segment->p_memsz > segment->p_filesz \
4483 ? segment->p_memsz : segment->p_filesz))
4485 /* Returns true if the given section is contained within
4486 the given segment. VMA addresses are compared. */
4487 #define IS_CONTAINED_BY_VMA(section, segment) \
4488 (section->vma >= segment->p_vaddr \
4489 && (section->vma + section->_raw_size) \
4490 <= (SEGMENT_END (segment, segment->p_vaddr)))
4492 /* Returns true if the given section is contained within
4493 the given segment. LMA addresses are compared. */
4494 #define IS_CONTAINED_BY_LMA(section, segment, base) \
4495 (section->lma >= base \
4496 && (section->lma + section->_raw_size) \
4497 <= SEGMENT_END (segment, base))
4499 /* Returns true if the given section is contained within the
4500 given segment. Filepos addresses are compared in an elf
4501 backend function. */
4502 #define IS_CONTAINED_BY_FILEPOS(sec, seg, bed) \
4503 (bed->is_contained_by_filepos \
4504 && (*bed->is_contained_by_filepos) (sec, seg))
4506 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
4507 #define IS_COREFILE_NOTE(p, s) \
4508 (p->p_type == PT_NOTE \
4509 && bfd_get_format (ibfd) == bfd_core \
4510 && s->vma == 0 && s->lma == 0 \
4511 && (bfd_vma) s->filepos >= p->p_offset \
4512 && (bfd_vma) s->filepos + s->_raw_size \
4513 <= p->p_offset + p->p_filesz)
4515 /* The complicated case when p_vaddr is 0 is to handle the Solaris
4516 linker, which generates a PT_INTERP section with p_vaddr and
4517 p_memsz set to 0. */
4518 #define IS_SOLARIS_PT_INTERP(p, s) \
4520 && p->p_filesz > 0 \
4521 && (s->flags & SEC_HAS_CONTENTS) != 0 \
4522 && s->_raw_size > 0 \
4523 && (bfd_vma) s->filepos >= p->p_offset \
4524 && ((bfd_vma) s->filepos + s->_raw_size \
4525 <= p->p_offset + p->p_filesz))
4527 /* Decide if the given section should be included in the given segment.
4528 A section will be included if:
4529 1. It is within the address space of the segment -- we use the LMA
4530 if that is set for the segment and the VMA otherwise,
4531 2. It is an allocated segment,
4532 3. There is an output section associated with it,
4533 4. The section has not already been allocated to a previous segment. */
4534 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
4535 (((((segment->p_paddr \
4536 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
4537 : IS_CONTAINED_BY_VMA (section, segment)) \
4538 || IS_SOLARIS_PT_INTERP (segment, section)) \
4539 && (section->flags & SEC_ALLOC) != 0) \
4540 || IS_COREFILE_NOTE (segment, section) \
4541 || (IS_CONTAINED_BY_FILEPOS (section, segment, bed) \
4542 && (section->flags & SEC_ALLOC) == 0)) \
4543 && section->output_section != NULL \
4544 && ! section->segment_mark)
4546 /* Returns true iff seg1 starts after the end of seg2. */
4547 #define SEGMENT_AFTER_SEGMENT(seg1, seg2) \
4548 (seg1->p_vaddr >= SEGMENT_END (seg2, seg2->p_vaddr))
4550 /* Returns true iff seg1 and seg2 overlap. */
4551 #define SEGMENT_OVERLAPS(seg1, seg2) \
4552 (!(SEGMENT_AFTER_SEGMENT (seg1, seg2) || SEGMENT_AFTER_SEGMENT (seg2, seg1)))
4554 /* Initialise the segment mark field. */
4555 for (section = ibfd->sections; section != NULL; section = section->next)
4556 section->segment_mark = false;
4558 /* Scan through the segments specified in the program header
4559 of the input BFD. For this first scan we look for overlaps
4560 in the loadable segments. These can be created by weird
4561 parameters to objcopy. */
4562 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4567 Elf_Internal_Phdr *segment2;
4569 if (segment->p_type != PT_LOAD)
4572 /* Determine if this segment overlaps any previous segments. */
4573 for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
4575 bfd_signed_vma extra_length;
4577 if (segment2->p_type != PT_LOAD
4578 || ! SEGMENT_OVERLAPS (segment, segment2))
4581 /* Merge the two segments together. */
4582 if (segment2->p_vaddr < segment->p_vaddr)
4584 /* Extend SEGMENT2 to include SEGMENT and then delete
4587 SEGMENT_END (segment, segment->p_vaddr)
4588 - SEGMENT_END (segment2, segment2->p_vaddr);
4590 if (extra_length > 0)
4592 segment2->p_memsz += extra_length;
4593 segment2->p_filesz += extra_length;
4596 segment->p_type = PT_NULL;
4598 /* Since we have deleted P we must restart the outer loop. */
4600 segment = elf_tdata (ibfd)->phdr;
4605 /* Extend SEGMENT to include SEGMENT2 and then delete
4608 SEGMENT_END (segment2, segment2->p_vaddr)
4609 - SEGMENT_END (segment, segment->p_vaddr);
4611 if (extra_length > 0)
4613 segment->p_memsz += extra_length;
4614 segment->p_filesz += extra_length;
4617 segment2->p_type = PT_NULL;
4622 /* The second scan attempts to assign sections to segments. */
4623 for (i = 0, segment = elf_tdata (ibfd)->phdr;
4627 unsigned int section_count;
4628 asection ** sections;
4629 asection * output_section;
4631 bfd_vma matching_lma;
4632 bfd_vma suggested_lma;
4636 if (segment->p_type == PT_NULL)
4639 /* Compute how many sections might be placed into this segment. */
4641 for (section = ibfd->sections; section != NULL; section = section->next)
4642 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4645 /* Allocate a segment map big enough to contain all of the
4646 sections we have selected. */
4647 amt = sizeof (struct elf_segment_map);
4648 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4649 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4653 /* Initialise the fields of the segment map. Default to
4654 using the physical address of the segment in the input BFD. */
4656 map->p_type = segment->p_type;
4657 map->p_flags = segment->p_flags;
4658 map->p_flags_valid = 1;
4659 map->p_paddr = segment->p_paddr;
4660 map->p_paddr_valid = 1;
4662 /* Determine if this segment contains the ELF file header
4663 and if it contains the program headers themselves. */
4664 map->includes_filehdr = (segment->p_offset == 0
4665 && segment->p_filesz >= iehdr->e_ehsize);
4667 map->includes_phdrs = 0;
4669 if (! phdr_included || segment->p_type != PT_LOAD)
4671 map->includes_phdrs =
4672 (segment->p_offset <= (bfd_vma) iehdr->e_phoff
4673 && (segment->p_offset + segment->p_filesz
4674 >= ((bfd_vma) iehdr->e_phoff
4675 + iehdr->e_phnum * iehdr->e_phentsize)));
4677 if (segment->p_type == PT_LOAD && map->includes_phdrs)
4678 phdr_included = true;
4681 if (section_count == 0)
4683 /* Special segments, such as the PT_PHDR segment, may contain
4684 no sections, but ordinary, loadable segments should contain
4685 something. They are allowed by the ELF spec however, so only
4686 a warning is produced. */
4687 if (segment->p_type == PT_LOAD)
4688 (*_bfd_error_handler)
4689 (_("%s: warning: Empty loadable segment detected, is this intentional ?\n"),
4690 bfd_archive_filename (ibfd));
4693 *pointer_to_map = map;
4694 pointer_to_map = &map->next;
4699 /* Now scan the sections in the input BFD again and attempt
4700 to add their corresponding output sections to the segment map.
4701 The problem here is how to handle an output section which has
4702 been moved (ie had its LMA changed). There are four possibilities:
4704 1. None of the sections have been moved.
4705 In this case we can continue to use the segment LMA from the
4708 2. All of the sections have been moved by the same amount.
4709 In this case we can change the segment's LMA to match the LMA
4710 of the first section.
4712 3. Some of the sections have been moved, others have not.
4713 In this case those sections which have not been moved can be
4714 placed in the current segment which will have to have its size,
4715 and possibly its LMA changed, and a new segment or segments will
4716 have to be created to contain the other sections.
4718 4. The sections have been moved, but not be the same amount.
4719 In this case we can change the segment's LMA to match the LMA
4720 of the first section and we will have to create a new segment
4721 or segments to contain the other sections.
4723 In order to save time, we allocate an array to hold the section
4724 pointers that we are interested in. As these sections get assigned
4725 to a segment, they are removed from this array. */
4727 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
4728 to work around this long long bug. */
4729 amt = section_count * sizeof (asection *);
4730 sections = (asection **) bfd_malloc (amt);
4731 if (sections == NULL)
4734 /* Step One: Scan for segment vs section LMA conflicts.
4735 Also add the sections to the section array allocated above.
4736 Also add the sections to the current segment. In the common
4737 case, where the sections have not been moved, this means that
4738 we have completely filled the segment, and there is nothing
4744 for (j = 0, section = ibfd->sections;
4746 section = section->next)
4748 if (INCLUDE_SECTION_IN_SEGMENT (section, segment, bed))
4750 output_section = section->output_section;
4752 sections[j ++] = section;
4754 /* The Solaris native linker always sets p_paddr to 0.
4755 We try to catch that case here, and set it to the
4757 if (segment->p_paddr == 0
4758 && segment->p_vaddr != 0
4760 && output_section->lma != 0
4761 && (output_section->vma == (segment->p_vaddr
4762 + (map->includes_filehdr
4765 + (map->includes_phdrs
4767 * iehdr->e_phentsize)
4769 map->p_paddr = segment->p_vaddr;
4771 /* Match up the physical address of the segment with the
4772 LMA address of the output section. */
4773 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4774 || IS_CONTAINED_BY_FILEPOS (section, segment, bed)
4775 || IS_COREFILE_NOTE (segment, section))
4777 if (matching_lma == 0)
4778 matching_lma = output_section->lma;
4780 /* We assume that if the section fits within the segment
4781 then it does not overlap any other section within that
4783 map->sections[isec ++] = output_section;
4785 else if (suggested_lma == 0)
4786 suggested_lma = output_section->lma;
4790 BFD_ASSERT (j == section_count);
4792 /* Step Two: Adjust the physical address of the current segment,
4794 if (isec == section_count)
4796 /* All of the sections fitted within the segment as currently
4797 specified. This is the default case. Add the segment to
4798 the list of built segments and carry on to process the next
4799 program header in the input BFD. */
4800 map->count = section_count;
4801 *pointer_to_map = map;
4802 pointer_to_map = &map->next;
4809 if (matching_lma != 0)
4811 /* At least one section fits inside the current segment.
4812 Keep it, but modify its physical address to match the
4813 LMA of the first section that fitted. */
4814 map->p_paddr = matching_lma;
4818 /* None of the sections fitted inside the current segment.
4819 Change the current segment's physical address to match
4820 the LMA of the first section. */
4821 map->p_paddr = suggested_lma;
4824 /* Offset the segment physical address from the lma
4825 to allow for space taken up by elf headers. */
4826 if (map->includes_filehdr)
4827 map->p_paddr -= iehdr->e_ehsize;
4829 if (map->includes_phdrs)
4831 map->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
4833 /* iehdr->e_phnum is just an estimate of the number
4834 of program headers that we will need. Make a note
4835 here of the number we used and the segment we chose
4836 to hold these headers, so that we can adjust the
4837 offset when we know the correct value. */
4838 phdr_adjust_num = iehdr->e_phnum;
4839 phdr_adjust_seg = map;
4843 /* Step Three: Loop over the sections again, this time assigning
4844 those that fit to the current segment and removing them from the
4845 sections array; but making sure not to leave large gaps. Once all
4846 possible sections have been assigned to the current segment it is
4847 added to the list of built segments and if sections still remain
4848 to be assigned, a new segment is constructed before repeating
4856 /* Fill the current segment with sections that fit. */
4857 for (j = 0; j < section_count; j++)
4859 section = sections[j];
4861 if (section == NULL)
4864 output_section = section->output_section;
4866 BFD_ASSERT (output_section != NULL);
4868 if (IS_CONTAINED_BY_LMA (output_section, segment, map->p_paddr)
4869 || IS_COREFILE_NOTE (segment, section))
4871 if (map->count == 0)
4873 /* If the first section in a segment does not start at
4874 the beginning of the segment, then something is
4876 if (output_section->lma !=
4878 + (map->includes_filehdr ? iehdr->e_ehsize : 0)
4879 + (map->includes_phdrs
4880 ? iehdr->e_phnum * iehdr->e_phentsize
4886 asection * prev_sec;
4888 prev_sec = map->sections[map->count - 1];
4890 /* If the gap between the end of the previous section
4891 and the start of this section is more than
4892 maxpagesize then we need to start a new segment. */
4893 if ((BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size,
4895 < BFD_ALIGN (output_section->lma, maxpagesize))
4896 || ((prev_sec->lma + prev_sec->_raw_size)
4897 > output_section->lma))
4899 if (suggested_lma == 0)
4900 suggested_lma = output_section->lma;
4906 map->sections[map->count++] = output_section;
4909 section->segment_mark = true;
4911 else if (suggested_lma == 0)
4912 suggested_lma = output_section->lma;
4915 BFD_ASSERT (map->count > 0);
4917 /* Add the current segment to the list of built segments. */
4918 *pointer_to_map = map;
4919 pointer_to_map = &map->next;
4921 if (isec < section_count)
4923 /* We still have not allocated all of the sections to
4924 segments. Create a new segment here, initialise it
4925 and carry on looping. */
4926 amt = sizeof (struct elf_segment_map);
4927 amt += ((bfd_size_type) section_count - 1) * sizeof (asection *);
4928 map = (struct elf_segment_map *) bfd_alloc (obfd, amt);
4932 /* Initialise the fields of the segment map. Set the physical
4933 physical address to the LMA of the first section that has
4934 not yet been assigned. */
4936 map->p_type = segment->p_type;
4937 map->p_flags = segment->p_flags;
4938 map->p_flags_valid = 1;
4939 map->p_paddr = suggested_lma;
4940 map->p_paddr_valid = 1;
4941 map->includes_filehdr = 0;
4942 map->includes_phdrs = 0;
4945 while (isec < section_count);
4950 /* The Solaris linker creates program headers in which all the
4951 p_paddr fields are zero. When we try to objcopy or strip such a
4952 file, we get confused. Check for this case, and if we find it
4953 reset the p_paddr_valid fields. */
4954 for (map = map_first; map != NULL; map = map->next)
4955 if (map->p_paddr != 0)
4959 for (map = map_first; map != NULL; map = map->next)
4960 map->p_paddr_valid = 0;
4963 elf_tdata (obfd)->segment_map = map_first;
4965 /* If we had to estimate the number of program headers that were
4966 going to be needed, then check our estimate now and adjust
4967 the offset if necessary. */
4968 if (phdr_adjust_seg != NULL)
4972 for (count = 0, map = map_first; map != NULL; map = map->next)
4975 if (count > phdr_adjust_num)
4976 phdr_adjust_seg->p_paddr
4977 -= (count - phdr_adjust_num) * iehdr->e_phentsize;
4981 /* Final Step: Sort the segments into ascending order of physical
4983 if (map_first != NULL)
4985 struct elf_segment_map *prev;
4988 for (map = map_first->next; map != NULL; prev = map, map = map->next)
4990 /* Yes I know - its a bubble sort.... */
4991 if (map->next != NULL && (map->next->p_paddr < map->p_paddr))
4993 /* Swap map and map->next. */
4994 prev->next = map->next;
4995 map->next = map->next->next;
4996 prev->next->next = map;
5006 #undef IS_CONTAINED_BY_VMA
5007 #undef IS_CONTAINED_BY_LMA
5008 #undef IS_CONTAINED_BY_FILEPOS
5009 #undef IS_COREFILE_NOTE
5010 #undef IS_SOLARIS_PT_INTERP
5011 #undef INCLUDE_SECTION_IN_SEGMENT
5012 #undef SEGMENT_AFTER_SEGMENT
5013 #undef SEGMENT_OVERLAPS
5017 /* Copy private section information. This copies over the entsize
5018 field, and sometimes the info field. */
5021 _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
5027 Elf_Internal_Shdr *ihdr, *ohdr;
5028 const struct elf_backend_data *bed = get_elf_backend_data (ibfd);
5030 if (ibfd->xvec->flavour != bfd_target_elf_flavour
5031 || obfd->xvec->flavour != bfd_target_elf_flavour)
5034 /* Copy over private BFD data if it has not already been copied.
5035 This must be done here, rather than in the copy_private_bfd_data
5036 entry point, because the latter is called after the section
5037 contents have been set, which means that the program headers have
5038 already been worked out. The backend function provides a way to
5039 override the test conditions and code path for the call to
5040 copy_private_bfd_data. */
5041 if (bed->copy_private_bfd_data_p)
5043 if ((*bed->copy_private_bfd_data_p) (ibfd, isec, obfd, osec))
5044 if (! copy_private_bfd_data (ibfd, obfd))
5047 else if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
5051 /* Only set up the segments if there are no more SEC_ALLOC
5052 sections. FIXME: This won't do the right thing if objcopy is
5053 used to remove the last SEC_ALLOC section, since objcopy
5054 won't call this routine in that case. */
5055 for (s = isec->next; s != NULL; s = s->next)
5056 if ((s->flags & SEC_ALLOC) != 0)
5060 if (! copy_private_bfd_data (ibfd, obfd))
5065 ihdr = &elf_section_data (isec)->this_hdr;
5066 ohdr = &elf_section_data (osec)->this_hdr;
5068 ohdr->sh_entsize = ihdr->sh_entsize;
5070 if (ihdr->sh_type == SHT_SYMTAB
5071 || ihdr->sh_type == SHT_DYNSYM
5072 || ihdr->sh_type == SHT_GNU_verneed
5073 || ihdr->sh_type == SHT_GNU_verdef)
5074 ohdr->sh_info = ihdr->sh_info;
5076 /* Set things up for objcopy. The output SHT_GROUP section will
5077 have its elf_next_in_group pointing back to the input group
5079 elf_next_in_group (osec) = elf_next_in_group (isec);
5080 elf_group_name (osec) = elf_group_name (isec);
5082 elf_section_data (osec)->use_rela_p
5083 = elf_section_data (isec)->use_rela_p;
5088 /* Copy private symbol information. If this symbol is in a section
5089 which we did not map into a BFD section, try to map the section
5090 index correctly. We use special macro definitions for the mapped
5091 section indices; these definitions are interpreted by the
5092 swap_out_syms function. */
5094 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5095 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5096 #define MAP_STRTAB (SHN_HIOS + 3)
5097 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5098 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5101 _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
5107 elf_symbol_type *isym, *osym;
5109 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5110 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5113 isym = elf_symbol_from (ibfd, isymarg);
5114 osym = elf_symbol_from (obfd, osymarg);
5118 && bfd_is_abs_section (isym->symbol.section))
5122 shndx = isym->internal_elf_sym.st_shndx;
5123 if (shndx == elf_onesymtab (ibfd))
5124 shndx = MAP_ONESYMTAB;
5125 else if (shndx == elf_dynsymtab (ibfd))
5126 shndx = MAP_DYNSYMTAB;
5127 else if (shndx == elf_tdata (ibfd)->strtab_section)
5129 else if (shndx == elf_tdata (ibfd)->shstrtab_section)
5130 shndx = MAP_SHSTRTAB;
5131 else if (shndx == elf_tdata (ibfd)->symtab_shndx_section)
5132 shndx = MAP_SYM_SHNDX;
5133 osym->internal_elf_sym.st_shndx = shndx;
5139 /* Swap out the symbols. */
5142 swap_out_syms (abfd, sttp, relocatable_p)
5144 struct bfd_strtab_hash **sttp;
5147 struct elf_backend_data *bed;
5150 struct bfd_strtab_hash *stt;
5151 Elf_Internal_Shdr *symtab_hdr;
5152 Elf_Internal_Shdr *symtab_shndx_hdr;
5153 Elf_Internal_Shdr *symstrtab_hdr;
5154 char *outbound_syms;
5155 char *outbound_shndx;
5159 if (!elf_map_symbols (abfd))
5162 /* Dump out the symtabs. */
5163 stt = _bfd_elf_stringtab_init ();
5167 bed = get_elf_backend_data (abfd);
5168 symcount = bfd_get_symcount (abfd);
5169 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5170 symtab_hdr->sh_type = SHT_SYMTAB;
5171 symtab_hdr->sh_entsize = bed->s->sizeof_sym;
5172 symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
5173 symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
5174 symtab_hdr->sh_addralign = bed->s->file_align;
5176 symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
5177 symstrtab_hdr->sh_type = SHT_STRTAB;
5179 amt = (bfd_size_type) (1 + symcount) * bed->s->sizeof_sym;
5180 outbound_syms = bfd_alloc (abfd, amt);
5181 if (outbound_syms == NULL)
5183 symtab_hdr->contents = (PTR) outbound_syms;
5185 outbound_shndx = NULL;
5186 symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
5187 if (symtab_shndx_hdr->sh_name != 0)
5189 amt = (bfd_size_type) (1 + symcount) * sizeof (Elf_External_Sym_Shndx);
5190 outbound_shndx = bfd_zalloc (abfd, amt);
5191 if (outbound_shndx == NULL)
5193 symtab_shndx_hdr->contents = outbound_shndx;
5194 symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX;
5195 symtab_shndx_hdr->sh_size = amt;
5196 symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx);
5197 symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx);
5200 /* now generate the data (for "contents") */
5202 /* Fill in zeroth symbol and swap it out. */
5203 Elf_Internal_Sym sym;
5209 sym.st_shndx = SHN_UNDEF;
5210 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5211 outbound_syms += bed->s->sizeof_sym;
5212 if (outbound_shndx != NULL)
5213 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5216 syms = bfd_get_outsymbols (abfd);
5217 for (idx = 0; idx < symcount; idx++)
5219 Elf_Internal_Sym sym;
5220 bfd_vma value = syms[idx]->value;
5221 elf_symbol_type *type_ptr;
5222 flagword flags = syms[idx]->flags;
5225 if ((flags & (BSF_SECTION_SYM | BSF_GLOBAL)) == BSF_SECTION_SYM)
5227 /* Local section symbols have no name. */
5232 sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
5235 if (sym.st_name == (unsigned long) -1)
5239 type_ptr = elf_symbol_from (abfd, syms[idx]);
5241 if ((flags & BSF_SECTION_SYM) == 0
5242 && bfd_is_com_section (syms[idx]->section))
5244 /* ELF common symbols put the alignment into the `value' field,
5245 and the size into the `size' field. This is backwards from
5246 how BFD handles it, so reverse it here. */
5247 sym.st_size = value;
5248 if (type_ptr == NULL
5249 || type_ptr->internal_elf_sym.st_value == 0)
5250 sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
5252 sym.st_value = type_ptr->internal_elf_sym.st_value;
5253 sym.st_shndx = _bfd_elf_section_from_bfd_section
5254 (abfd, syms[idx]->section);
5258 asection *sec = syms[idx]->section;
5261 if (sec->output_section)
5263 value += sec->output_offset;
5264 sec = sec->output_section;
5266 /* Don't add in the section vma for relocatable output. */
5267 if (! relocatable_p)
5269 sym.st_value = value;
5270 sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
5272 if (bfd_is_abs_section (sec)
5274 && type_ptr->internal_elf_sym.st_shndx != 0)
5276 /* This symbol is in a real ELF section which we did
5277 not create as a BFD section. Undo the mapping done
5278 by copy_private_symbol_data. */
5279 shndx = type_ptr->internal_elf_sym.st_shndx;
5283 shndx = elf_onesymtab (abfd);
5286 shndx = elf_dynsymtab (abfd);
5289 shndx = elf_tdata (abfd)->strtab_section;
5292 shndx = elf_tdata (abfd)->shstrtab_section;
5295 shndx = elf_tdata (abfd)->symtab_shndx_section;
5303 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
5309 /* Writing this would be a hell of a lot easier if
5310 we had some decent documentation on bfd, and
5311 knew what to expect of the library, and what to
5312 demand of applications. For example, it
5313 appears that `objcopy' might not set the
5314 section of a symbol to be a section that is
5315 actually in the output file. */
5316 sec2 = bfd_get_section_by_name (abfd, sec->name);
5317 BFD_ASSERT (sec2 != 0);
5318 shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
5319 BFD_ASSERT (shndx != -1);
5323 sym.st_shndx = shndx;
5326 if ((flags & BSF_THREAD_LOCAL) != 0)
5328 else if ((flags & BSF_FUNCTION) != 0)
5330 else if ((flags & BSF_OBJECT) != 0)
5335 if (syms[idx]->section->flags & SEC_THREAD_LOCAL)
5338 /* Processor-specific types */
5339 if (type_ptr != NULL
5340 && bed->elf_backend_get_symbol_type)
5341 type = ((*bed->elf_backend_get_symbol_type)
5342 (&type_ptr->internal_elf_sym, type));
5344 if (flags & BSF_SECTION_SYM)
5346 if (flags & BSF_GLOBAL)
5347 sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
5349 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
5351 else if (bfd_is_com_section (syms[idx]->section))
5352 sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
5353 else if (bfd_is_und_section (syms[idx]->section))
5354 sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
5358 else if (flags & BSF_FILE)
5359 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
5362 int bind = STB_LOCAL;
5364 if (flags & BSF_LOCAL)
5366 else if (flags & BSF_WEAK)
5368 else if (flags & BSF_GLOBAL)
5371 sym.st_info = ELF_ST_INFO (bind, type);
5374 if (type_ptr != NULL)
5375 sym.st_other = type_ptr->internal_elf_sym.st_other;
5379 bed->s->swap_symbol_out (abfd, &sym, outbound_syms, outbound_shndx);
5380 outbound_syms += bed->s->sizeof_sym;
5381 if (outbound_shndx != NULL)
5382 outbound_shndx += sizeof (Elf_External_Sym_Shndx);
5386 symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
5387 symstrtab_hdr->sh_type = SHT_STRTAB;
5389 symstrtab_hdr->sh_flags = 0;
5390 symstrtab_hdr->sh_addr = 0;
5391 symstrtab_hdr->sh_entsize = 0;
5392 symstrtab_hdr->sh_link = 0;
5393 symstrtab_hdr->sh_info = 0;
5394 symstrtab_hdr->sh_addralign = 1;
5399 /* Return the number of bytes required to hold the symtab vector.
5401 Note that we base it on the count plus 1, since we will null terminate
5402 the vector allocated based on this size. However, the ELF symbol table
5403 always has a dummy entry as symbol #0, so it ends up even. */
5406 _bfd_elf_get_symtab_upper_bound (abfd)
5411 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
5413 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5414 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5416 symtab_size -= sizeof (asymbol *);
5422 _bfd_elf_get_dynamic_symtab_upper_bound (abfd)
5427 Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
5429 if (elf_dynsymtab (abfd) == 0)
5431 bfd_set_error (bfd_error_invalid_operation);
5435 symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
5436 symtab_size = (symcount + 1) * (sizeof (asymbol *));
5438 symtab_size -= sizeof (asymbol *);
5444 _bfd_elf_get_reloc_upper_bound (abfd, asect)
5445 bfd *abfd ATTRIBUTE_UNUSED;
5448 return (asect->reloc_count + 1) * sizeof (arelent *);
5451 /* Canonicalize the relocs. */
5454 _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
5462 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5464 if (! bed->s->slurp_reloc_table (abfd, section, symbols, false))
5467 tblptr = section->relocation;
5468 for (i = 0; i < section->reloc_count; i++)
5469 *relptr++ = tblptr++;
5473 return section->reloc_count;
5477 _bfd_elf_get_symtab (abfd, alocation)
5479 asymbol **alocation;
5481 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5482 long symcount = bed->s->slurp_symbol_table (abfd, alocation, false);
5485 bfd_get_symcount (abfd) = symcount;
5490 _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
5492 asymbol **alocation;
5494 struct elf_backend_data *bed = get_elf_backend_data (abfd);
5495 return bed->s->slurp_symbol_table (abfd, alocation, true);
5498 /* Return the size required for the dynamic reloc entries. Any
5499 section that was actually installed in the BFD, and has type
5500 SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
5501 considered to be a dynamic reloc section. */
5504 _bfd_elf_get_dynamic_reloc_upper_bound (abfd)
5510 if (elf_dynsymtab (abfd) == 0)
5512 bfd_set_error (bfd_error_invalid_operation);
5516 ret = sizeof (arelent *);
5517 for (s = abfd->sections; s != NULL; s = s->next)
5518 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5519 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5520 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5521 ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
5522 * sizeof (arelent *));
5527 /* Canonicalize the dynamic relocation entries. Note that we return
5528 the dynamic relocations as a single block, although they are
5529 actually associated with particular sections; the interface, which
5530 was designed for SunOS style shared libraries, expects that there
5531 is only one set of dynamic relocs. Any section that was actually
5532 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
5533 the dynamic symbol table, is considered to be a dynamic reloc
5537 _bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
5542 boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
5546 if (elf_dynsymtab (abfd) == 0)
5548 bfd_set_error (bfd_error_invalid_operation);
5552 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5554 for (s = abfd->sections; s != NULL; s = s->next)
5556 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
5557 && (elf_section_data (s)->this_hdr.sh_type == SHT_REL
5558 || elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
5563 if (! (*slurp_relocs) (abfd, s, syms, true))
5565 count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
5567 for (i = 0; i < count; i++)
5578 /* Read in the version information. */
5581 _bfd_elf_slurp_version_tables (abfd)
5584 bfd_byte *contents = NULL;
5587 if (elf_dynverdef (abfd) != 0)
5589 Elf_Internal_Shdr *hdr;
5590 Elf_External_Verdef *everdef;
5591 Elf_Internal_Verdef *iverdef;
5592 Elf_Internal_Verdef *iverdefarr;
5593 Elf_Internal_Verdef iverdefmem;
5595 unsigned int maxidx;
5597 hdr = &elf_tdata (abfd)->dynverdef_hdr;
5599 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5600 if (contents == NULL)
5602 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5603 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5606 /* We know the number of entries in the section but not the maximum
5607 index. Therefore we have to run through all entries and find
5609 everdef = (Elf_External_Verdef *) contents;
5611 for (i = 0; i < hdr->sh_info; ++i)
5613 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5615 if ((iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION)) > maxidx)
5616 maxidx = iverdefmem.vd_ndx & ((unsigned) VERSYM_VERSION);
5618 everdef = ((Elf_External_Verdef *)
5619 ((bfd_byte *) everdef + iverdefmem.vd_next));
5622 amt = (bfd_size_type) maxidx * sizeof (Elf_Internal_Verdef);
5623 elf_tdata (abfd)->verdef = (Elf_Internal_Verdef *) bfd_zalloc (abfd, amt);
5624 if (elf_tdata (abfd)->verdef == NULL)
5627 elf_tdata (abfd)->cverdefs = maxidx;
5629 everdef = (Elf_External_Verdef *) contents;
5630 iverdefarr = elf_tdata (abfd)->verdef;
5631 for (i = 0; i < hdr->sh_info; i++)
5633 Elf_External_Verdaux *everdaux;
5634 Elf_Internal_Verdaux *iverdaux;
5637 _bfd_elf_swap_verdef_in (abfd, everdef, &iverdefmem);
5639 iverdef = &iverdefarr[(iverdefmem.vd_ndx & VERSYM_VERSION) - 1];
5640 memcpy (iverdef, &iverdefmem, sizeof (Elf_Internal_Verdef));
5642 iverdef->vd_bfd = abfd;
5644 amt = (bfd_size_type) iverdef->vd_cnt * sizeof (Elf_Internal_Verdaux);
5645 iverdef->vd_auxptr = (Elf_Internal_Verdaux *) bfd_alloc (abfd, amt);
5646 if (iverdef->vd_auxptr == NULL)
5649 everdaux = ((Elf_External_Verdaux *)
5650 ((bfd_byte *) everdef + iverdef->vd_aux));
5651 iverdaux = iverdef->vd_auxptr;
5652 for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
5654 _bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
5656 iverdaux->vda_nodename =
5657 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5658 iverdaux->vda_name);
5659 if (iverdaux->vda_nodename == NULL)
5662 if (j + 1 < iverdef->vd_cnt)
5663 iverdaux->vda_nextptr = iverdaux + 1;
5665 iverdaux->vda_nextptr = NULL;
5667 everdaux = ((Elf_External_Verdaux *)
5668 ((bfd_byte *) everdaux + iverdaux->vda_next));
5671 iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
5673 if (i + 1 < hdr->sh_info)
5674 iverdef->vd_nextdef = iverdef + 1;
5676 iverdef->vd_nextdef = NULL;
5678 everdef = ((Elf_External_Verdef *)
5679 ((bfd_byte *) everdef + iverdef->vd_next));
5686 if (elf_dynverref (abfd) != 0)
5688 Elf_Internal_Shdr *hdr;
5689 Elf_External_Verneed *everneed;
5690 Elf_Internal_Verneed *iverneed;
5693 hdr = &elf_tdata (abfd)->dynverref_hdr;
5695 amt = (bfd_size_type) hdr->sh_info * sizeof (Elf_Internal_Verneed);
5696 elf_tdata (abfd)->verref =
5697 (Elf_Internal_Verneed *) bfd_zalloc (abfd, amt);
5698 if (elf_tdata (abfd)->verref == NULL)
5701 elf_tdata (abfd)->cverrefs = hdr->sh_info;
5703 contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
5704 if (contents == NULL)
5706 if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
5707 || bfd_bread ((PTR) contents, hdr->sh_size, abfd) != hdr->sh_size)
5710 everneed = (Elf_External_Verneed *) contents;
5711 iverneed = elf_tdata (abfd)->verref;
5712 for (i = 0; i < hdr->sh_info; i++, iverneed++)
5714 Elf_External_Vernaux *evernaux;
5715 Elf_Internal_Vernaux *ivernaux;
5718 _bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
5720 iverneed->vn_bfd = abfd;
5722 iverneed->vn_filename =
5723 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5725 if (iverneed->vn_filename == NULL)
5728 amt = iverneed->vn_cnt;
5729 amt *= sizeof (Elf_Internal_Vernaux);
5730 iverneed->vn_auxptr = (Elf_Internal_Vernaux *) bfd_alloc (abfd, amt);
5732 evernaux = ((Elf_External_Vernaux *)
5733 ((bfd_byte *) everneed + iverneed->vn_aux));
5734 ivernaux = iverneed->vn_auxptr;
5735 for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
5737 _bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
5739 ivernaux->vna_nodename =
5740 bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
5741 ivernaux->vna_name);
5742 if (ivernaux->vna_nodename == NULL)
5745 if (j + 1 < iverneed->vn_cnt)
5746 ivernaux->vna_nextptr = ivernaux + 1;
5748 ivernaux->vna_nextptr = NULL;
5750 evernaux = ((Elf_External_Vernaux *)
5751 ((bfd_byte *) evernaux + ivernaux->vna_next));
5754 if (i + 1 < hdr->sh_info)
5755 iverneed->vn_nextref = iverneed + 1;
5757 iverneed->vn_nextref = NULL;
5759 everneed = ((Elf_External_Verneed *)
5760 ((bfd_byte *) everneed + iverneed->vn_next));
5770 if (contents == NULL)
5776 _bfd_elf_make_empty_symbol (abfd)
5779 elf_symbol_type *newsym;
5780 bfd_size_type amt = sizeof (elf_symbol_type);
5782 newsym = (elf_symbol_type *) bfd_zalloc (abfd, amt);
5787 newsym->symbol.the_bfd = abfd;
5788 return &newsym->symbol;
5793 _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
5794 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5798 bfd_symbol_info (symbol, ret);
5801 /* Return whether a symbol name implies a local symbol. Most targets
5802 use this function for the is_local_label_name entry point, but some
5806 _bfd_elf_is_local_label_name (abfd, name)
5807 bfd *abfd ATTRIBUTE_UNUSED;
5810 /* Normal local symbols start with ``.L''. */
5811 if (name[0] == '.' && name[1] == 'L')
5814 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
5815 DWARF debugging symbols starting with ``..''. */
5816 if (name[0] == '.' && name[1] == '.')
5819 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
5820 emitting DWARF debugging output. I suspect this is actually a
5821 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
5822 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
5823 underscore to be emitted on some ELF targets). For ease of use,
5824 we treat such symbols as local. */
5825 if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
5832 _bfd_elf_get_lineno (ignore_abfd, symbol)
5833 bfd *ignore_abfd ATTRIBUTE_UNUSED;
5834 asymbol *symbol ATTRIBUTE_UNUSED;
5841 _bfd_elf_set_arch_mach (abfd, arch, machine)
5843 enum bfd_architecture arch;
5844 unsigned long machine;
5846 /* If this isn't the right architecture for this backend, and this
5847 isn't the generic backend, fail. */
5848 if (arch != get_elf_backend_data (abfd)->arch
5849 && arch != bfd_arch_unknown
5850 && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
5853 return bfd_default_set_arch_mach (abfd, arch, machine);
5856 /* Find the function to a particular section and offset,
5857 for error reporting. */
5860 elf_find_function (abfd, section, symbols, offset,
5861 filename_ptr, functionname_ptr)
5862 bfd *abfd ATTRIBUTE_UNUSED;
5866 const char **filename_ptr;
5867 const char **functionname_ptr;
5869 const char *filename;
5878 for (p = symbols; *p != NULL; p++)
5882 q = (elf_symbol_type *) *p;
5884 if (bfd_get_section (&q->symbol) != section)
5887 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5892 filename = bfd_asymbol_name (&q->symbol);
5896 if (q->symbol.section == section
5897 && q->symbol.value >= low_func
5898 && q->symbol.value <= offset)
5900 func = (asymbol *) q;
5901 low_func = q->symbol.value;
5911 *filename_ptr = filename;
5912 if (functionname_ptr)
5913 *functionname_ptr = bfd_asymbol_name (func);
5918 /* Find the nearest line to a particular section and offset,
5919 for error reporting. */
5922 _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
5923 filename_ptr, functionname_ptr, line_ptr)
5928 const char **filename_ptr;
5929 const char **functionname_ptr;
5930 unsigned int *line_ptr;
5934 if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
5935 filename_ptr, functionname_ptr,
5938 if (!*functionname_ptr)
5939 elf_find_function (abfd, section, symbols, offset,
5940 *filename_ptr ? NULL : filename_ptr,
5946 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
5947 filename_ptr, functionname_ptr,
5949 &elf_tdata (abfd)->dwarf2_find_line_info))
5951 if (!*functionname_ptr)
5952 elf_find_function (abfd, section, symbols, offset,
5953 *filename_ptr ? NULL : filename_ptr,
5959 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5960 &found, filename_ptr,
5961 functionname_ptr, line_ptr,
5962 &elf_tdata (abfd)->line_info))
5967 if (symbols == NULL)
5970 if (! elf_find_function (abfd, section, symbols, offset,
5971 filename_ptr, functionname_ptr))
5979 _bfd_elf_sizeof_headers (abfd, reloc)
5985 ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
5987 ret += get_program_header_size (abfd);
5992 _bfd_elf_set_section_contents (abfd, section, location, offset, count)
5997 bfd_size_type count;
5999 Elf_Internal_Shdr *hdr;
6002 if (! abfd->output_has_begun
6003 && ! (_bfd_elf_compute_section_file_positions
6004 (abfd, (struct bfd_link_info *) NULL)))
6007 hdr = &elf_section_data (section)->this_hdr;
6008 pos = hdr->sh_offset + offset;
6009 if (bfd_seek (abfd, pos, SEEK_SET) != 0
6010 || bfd_bwrite (location, count, abfd) != count)
6017 _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
6018 bfd *abfd ATTRIBUTE_UNUSED;
6019 arelent *cache_ptr ATTRIBUTE_UNUSED;
6020 Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
6027 _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
6030 Elf_Internal_Rel *dst;
6036 /* Try to convert a non-ELF reloc into an ELF one. */
6039 _bfd_elf_validate_reloc (abfd, areloc)
6043 /* Check whether we really have an ELF howto. */
6045 if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
6047 bfd_reloc_code_real_type code;
6048 reloc_howto_type *howto;
6050 /* Alien reloc: Try to determine its type to replace it with an
6051 equivalent ELF reloc. */
6053 if (areloc->howto->pc_relative)
6055 switch (areloc->howto->bitsize)
6058 code = BFD_RELOC_8_PCREL;
6061 code = BFD_RELOC_12_PCREL;
6064 code = BFD_RELOC_16_PCREL;
6067 code = BFD_RELOC_24_PCREL;
6070 code = BFD_RELOC_32_PCREL;
6073 code = BFD_RELOC_64_PCREL;
6079 howto = bfd_reloc_type_lookup (abfd, code);
6081 if (areloc->howto->pcrel_offset != howto->pcrel_offset)
6083 if (howto->pcrel_offset)
6084 areloc->addend += areloc->address;
6086 areloc->addend -= areloc->address; /* addend is unsigned!! */
6091 switch (areloc->howto->bitsize)
6097 code = BFD_RELOC_14;
6100 code = BFD_RELOC_16;
6103 code = BFD_RELOC_26;
6106 code = BFD_RELOC_32;
6109 code = BFD_RELOC_64;
6115 howto = bfd_reloc_type_lookup (abfd, code);
6119 areloc->howto = howto;
6127 (*_bfd_error_handler)
6128 (_("%s: unsupported relocation type %s"),
6129 bfd_archive_filename (abfd), areloc->howto->name);
6130 bfd_set_error (bfd_error_bad_value);
6135 _bfd_elf_close_and_cleanup (abfd)
6138 if (bfd_get_format (abfd) == bfd_object)
6140 if (elf_shstrtab (abfd) != NULL)
6141 _bfd_elf_strtab_free (elf_shstrtab (abfd));
6144 return _bfd_generic_close_and_cleanup (abfd);
6147 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6148 in the relocation's offset. Thus we cannot allow any sort of sanity
6149 range-checking to interfere. There is nothing else to do in processing
6152 bfd_reloc_status_type
6153 _bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
6154 bfd *abfd ATTRIBUTE_UNUSED;
6155 arelent *re ATTRIBUTE_UNUSED;
6156 struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
6157 PTR data ATTRIBUTE_UNUSED;
6158 asection *is ATTRIBUTE_UNUSED;
6159 bfd *obfd ATTRIBUTE_UNUSED;
6160 char **errmsg ATTRIBUTE_UNUSED;
6162 return bfd_reloc_ok;
6165 /* Elf core file support. Much of this only works on native
6166 toolchains, since we rely on knowing the
6167 machine-dependent procfs structure in order to pick
6168 out details about the corefile. */
6170 #ifdef HAVE_SYS_PROCFS_H
6171 # include <sys/procfs.h>
6174 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6177 elfcore_make_pid (abfd)
6180 return ((elf_tdata (abfd)->core_lwpid << 16)
6181 + (elf_tdata (abfd)->core_pid));
6184 /* If there isn't a section called NAME, make one, using
6185 data from SECT. Note, this function will generate a
6186 reference to NAME, so you shouldn't deallocate or
6190 elfcore_maybe_make_sect (abfd, name, sect)
6197 if (bfd_get_section_by_name (abfd, name) != NULL)
6200 sect2 = bfd_make_section (abfd, name);
6204 sect2->_raw_size = sect->_raw_size;
6205 sect2->filepos = sect->filepos;
6206 sect2->flags = sect->flags;
6207 sect2->alignment_power = sect->alignment_power;
6211 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6212 actually creates up to two pseudosections:
6213 - For the single-threaded case, a section named NAME, unless
6214 such a section already exists.
6215 - For the multi-threaded case, a section named "NAME/PID", where
6216 PID is elfcore_make_pid (abfd).
6217 Both pseudosections have identical contents. */
6219 _bfd_elfcore_make_pseudosection (abfd, name, size, filepos)
6226 char *threaded_name;
6230 /* Build the section name. */
6232 sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
6233 len = strlen (buf) + 1;
6234 threaded_name = bfd_alloc (abfd, (bfd_size_type) len);
6235 if (threaded_name == NULL)
6237 memcpy (threaded_name, buf, len);
6239 sect = bfd_make_section (abfd, threaded_name);
6242 sect->_raw_size = size;
6243 sect->filepos = filepos;
6244 sect->flags = SEC_HAS_CONTENTS;
6245 sect->alignment_power = 2;
6247 return elfcore_maybe_make_sect (abfd, name, sect);
6250 /* prstatus_t exists on:
6252 linux 2.[01] + glibc
6256 #if defined (HAVE_PRSTATUS_T)
6257 static boolean elfcore_grok_prstatus PARAMS ((bfd *, Elf_Internal_Note *));
6260 elfcore_grok_prstatus (abfd, note)
6262 Elf_Internal_Note *note;
6267 if (note->descsz == sizeof (prstatus_t))
6271 raw_size = sizeof (prstat.pr_reg);
6272 offset = offsetof (prstatus_t, pr_reg);
6273 memcpy (&prstat, note->descdata, sizeof (prstat));
6275 /* Do not overwrite the core signal if it
6276 has already been set by another thread. */
6277 if (elf_tdata (abfd)->core_signal == 0)
6278 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6279 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6281 /* pr_who exists on:
6284 pr_who doesn't exist on:
6287 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6288 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6291 #if defined (HAVE_PRSTATUS32_T)
6292 else if (note->descsz == sizeof (prstatus32_t))
6294 /* 64-bit host, 32-bit corefile */
6295 prstatus32_t prstat;
6297 raw_size = sizeof (prstat.pr_reg);
6298 offset = offsetof (prstatus32_t, pr_reg);
6299 memcpy (&prstat, note->descdata, sizeof (prstat));
6301 /* Do not overwrite the core signal if it
6302 has already been set by another thread. */
6303 if (elf_tdata (abfd)->core_signal == 0)
6304 elf_tdata (abfd)->core_signal = prstat.pr_cursig;
6305 elf_tdata (abfd)->core_pid = prstat.pr_pid;
6307 /* pr_who exists on:
6310 pr_who doesn't exist on:
6313 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6314 elf_tdata (abfd)->core_lwpid = prstat.pr_who;
6317 #endif /* HAVE_PRSTATUS32_T */
6320 /* Fail - we don't know how to handle any other
6321 note size (ie. data object type). */
6325 /* Make a ".reg/999" section and a ".reg" section. */
6326 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
6327 raw_size, note->descpos + offset);
6329 #endif /* defined (HAVE_PRSTATUS_T) */
6331 /* Create a pseudosection containing the exact contents of NOTE. */
6333 elfcore_make_note_pseudosection (abfd, name, note)
6336 Elf_Internal_Note *note;
6338 return _bfd_elfcore_make_pseudosection (abfd, name,
6339 note->descsz, note->descpos);
6342 /* There isn't a consistent prfpregset_t across platforms,
6343 but it doesn't matter, because we don't have to pick this
6344 data structure apart. */
6347 elfcore_grok_prfpreg (abfd, note)
6349 Elf_Internal_Note *note;
6351 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6354 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6355 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6359 elfcore_grok_prxfpreg (abfd, note)
6361 Elf_Internal_Note *note;
6363 return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
6366 #if defined (HAVE_PRPSINFO_T)
6367 typedef prpsinfo_t elfcore_psinfo_t;
6368 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
6369 typedef prpsinfo32_t elfcore_psinfo32_t;
6373 #if defined (HAVE_PSINFO_T)
6374 typedef psinfo_t elfcore_psinfo_t;
6375 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
6376 typedef psinfo32_t elfcore_psinfo32_t;
6380 /* return a malloc'ed copy of a string at START which is at
6381 most MAX bytes long, possibly without a terminating '\0'.
6382 the copy will always have a terminating '\0'. */
6385 _bfd_elfcore_strndup (abfd, start, max)
6391 char *end = memchr (start, '\0', max);
6399 dups = bfd_alloc (abfd, (bfd_size_type) len + 1);
6403 memcpy (dups, start, len);
6409 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6410 static boolean elfcore_grok_psinfo PARAMS ((bfd *, Elf_Internal_Note *));
6413 elfcore_grok_psinfo (abfd, note)
6415 Elf_Internal_Note *note;
6417 if (note->descsz == sizeof (elfcore_psinfo_t))
6419 elfcore_psinfo_t psinfo;
6421 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6423 elf_tdata (abfd)->core_program
6424 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6425 sizeof (psinfo.pr_fname));
6427 elf_tdata (abfd)->core_command
6428 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6429 sizeof (psinfo.pr_psargs));
6431 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
6432 else if (note->descsz == sizeof (elfcore_psinfo32_t))
6434 /* 64-bit host, 32-bit corefile */
6435 elfcore_psinfo32_t psinfo;
6437 memcpy (&psinfo, note->descdata, sizeof (psinfo));
6439 elf_tdata (abfd)->core_program
6440 = _bfd_elfcore_strndup (abfd, psinfo.pr_fname,
6441 sizeof (psinfo.pr_fname));
6443 elf_tdata (abfd)->core_command
6444 = _bfd_elfcore_strndup (abfd, psinfo.pr_psargs,
6445 sizeof (psinfo.pr_psargs));
6451 /* Fail - we don't know how to handle any other
6452 note size (ie. data object type). */
6456 /* Note that for some reason, a spurious space is tacked
6457 onto the end of the args in some (at least one anyway)
6458 implementations, so strip it off if it exists. */
6461 char *command = elf_tdata (abfd)->core_command;
6462 int n = strlen (command);
6464 if (0 < n && command[n - 1] == ' ')
6465 command[n - 1] = '\0';
6470 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
6472 #if defined (HAVE_PSTATUS_T)
6473 static boolean elfcore_grok_pstatus PARAMS ((bfd *, Elf_Internal_Note *));
6476 elfcore_grok_pstatus (abfd, note)
6478 Elf_Internal_Note *note;
6480 if (note->descsz == sizeof (pstatus_t)
6481 #if defined (HAVE_PXSTATUS_T)
6482 || note->descsz == sizeof (pxstatus_t)
6488 memcpy (&pstat, note->descdata, sizeof (pstat));
6490 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6492 #if defined (HAVE_PSTATUS32_T)
6493 else if (note->descsz == sizeof (pstatus32_t))
6495 /* 64-bit host, 32-bit corefile */
6498 memcpy (&pstat, note->descdata, sizeof (pstat));
6500 elf_tdata (abfd)->core_pid = pstat.pr_pid;
6503 /* Could grab some more details from the "representative"
6504 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
6505 NT_LWPSTATUS note, presumably. */
6509 #endif /* defined (HAVE_PSTATUS_T) */
6511 #if defined (HAVE_LWPSTATUS_T)
6512 static boolean elfcore_grok_lwpstatus PARAMS ((bfd *, Elf_Internal_Note *));
6515 elfcore_grok_lwpstatus (abfd, note)
6517 Elf_Internal_Note *note;
6519 lwpstatus_t lwpstat;
6525 if (note->descsz != sizeof (lwpstat)
6526 #if defined (HAVE_LWPXSTATUS_T)
6527 && note->descsz != sizeof (lwpxstatus_t)
6532 memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
6534 elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
6535 elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
6537 /* Make a ".reg/999" section. */
6539 sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
6540 len = strlen (buf) + 1;
6541 name = bfd_alloc (abfd, (bfd_size_type) len);
6544 memcpy (name, buf, len);
6546 sect = bfd_make_section (abfd, name);
6550 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6551 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
6552 sect->filepos = note->descpos
6553 + offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
6556 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6557 sect->_raw_size = sizeof (lwpstat.pr_reg);
6558 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
6561 sect->flags = SEC_HAS_CONTENTS;
6562 sect->alignment_power = 2;
6564 if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
6567 /* Make a ".reg2/999" section */
6569 sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
6570 len = strlen (buf) + 1;
6571 name = bfd_alloc (abfd, (bfd_size_type) len);
6574 memcpy (name, buf, len);
6576 sect = bfd_make_section (abfd, name);
6580 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6581 sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
6582 sect->filepos = note->descpos
6583 + offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
6586 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
6587 sect->_raw_size = sizeof (lwpstat.pr_fpreg);
6588 sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
6591 sect->flags = SEC_HAS_CONTENTS;
6592 sect->alignment_power = 2;
6594 return elfcore_maybe_make_sect (abfd, ".reg2", sect);
6596 #endif /* defined (HAVE_LWPSTATUS_T) */
6598 #if defined (HAVE_WIN32_PSTATUS_T)
6600 elfcore_grok_win32pstatus (abfd, note)
6602 Elf_Internal_Note *note;
6608 win32_pstatus_t pstatus;
6610 if (note->descsz < sizeof (pstatus))
6613 memcpy (&pstatus, note->descdata, sizeof (pstatus));
6615 switch (pstatus.data_type)
6617 case NOTE_INFO_PROCESS:
6618 /* FIXME: need to add ->core_command. */
6619 elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
6620 elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
6623 case NOTE_INFO_THREAD:
6624 /* Make a ".reg/999" section. */
6625 sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
6627 len = strlen (buf) + 1;
6628 name = bfd_alloc (abfd, (bfd_size_type) len);
6632 memcpy (name, buf, len);
6634 sect = bfd_make_section (abfd, name);
6638 sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
6639 sect->filepos = (note->descpos
6640 + offsetof (struct win32_pstatus,
6641 data.thread_info.thread_context));
6642 sect->flags = SEC_HAS_CONTENTS;
6643 sect->alignment_power = 2;
6645 if (pstatus.data.thread_info.is_active_thread)
6646 if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
6650 case NOTE_INFO_MODULE:
6651 /* Make a ".module/xxxxxxxx" section. */
6652 sprintf (buf, ".module/%08x", pstatus.data.module_info.base_address);
6654 len = strlen (buf) + 1;
6655 name = bfd_alloc (abfd, (bfd_size_type) len);
6659 memcpy (name, buf, len);
6661 sect = bfd_make_section (abfd, name);
6666 sect->_raw_size = note->descsz;
6667 sect->filepos = note->descpos;
6668 sect->flags = SEC_HAS_CONTENTS;
6669 sect->alignment_power = 2;
6678 #endif /* HAVE_WIN32_PSTATUS_T */
6681 elfcore_grok_note (abfd, note)
6683 Elf_Internal_Note *note;
6685 struct elf_backend_data *bed = get_elf_backend_data (abfd);
6693 if (bed->elf_backend_grok_prstatus)
6694 if ((*bed->elf_backend_grok_prstatus) (abfd, note))
6696 #if defined (HAVE_PRSTATUS_T)
6697 return elfcore_grok_prstatus (abfd, note);
6702 #if defined (HAVE_PSTATUS_T)
6704 return elfcore_grok_pstatus (abfd, note);
6707 #if defined (HAVE_LWPSTATUS_T)
6709 return elfcore_grok_lwpstatus (abfd, note);
6712 case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
6713 return elfcore_grok_prfpreg (abfd, note);
6715 #if defined (HAVE_WIN32_PSTATUS_T)
6716 case NT_WIN32PSTATUS:
6717 return elfcore_grok_win32pstatus (abfd, note);
6720 case NT_PRXFPREG: /* Linux SSE extension */
6721 if (note->namesz == 5
6722 && ! strcmp (note->namedata, "LINUX"))
6723 return elfcore_grok_prxfpreg (abfd, note);
6729 if (bed->elf_backend_grok_psinfo)
6730 if ((*bed->elf_backend_grok_psinfo) (abfd, note))
6732 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6733 return elfcore_grok_psinfo (abfd, note);
6741 elfcore_netbsd_get_lwpid (note, lwpidp)
6742 Elf_Internal_Note *note;
6747 cp = strchr (note->namedata, '@');
6750 *lwpidp = atoi(cp + 1);
6757 elfcore_grok_netbsd_procinfo (abfd, note)
6759 Elf_Internal_Note *note;
6762 /* Signal number at offset 0x08. */
6763 elf_tdata (abfd)->core_signal
6764 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x08);
6766 /* Process ID at offset 0x50. */
6767 elf_tdata (abfd)->core_pid
6768 = bfd_h_get_32 (abfd, (bfd_byte *) note->descdata + 0x50);
6770 /* Command name at 0x7c (max 32 bytes, including nul). */
6771 elf_tdata (abfd)->core_command
6772 = _bfd_elfcore_strndup (abfd, note->descdata + 0x7c, 31);
6778 elfcore_grok_netbsd_note (abfd, note)
6780 Elf_Internal_Note *note;
6784 if (elfcore_netbsd_get_lwpid (note, &lwp))
6785 elf_tdata (abfd)->core_lwpid = lwp;
6787 if (note->type == NT_NETBSDCORE_PROCINFO)
6789 /* NetBSD-specific core "procinfo". Note that we expect to
6790 find this note before any of the others, which is fine,
6791 since the kernel writes this note out first when it
6792 creates a core file. */
6794 return elfcore_grok_netbsd_procinfo (abfd, note);
6797 /* As of Jan 2002 there are no other machine-independent notes
6798 defined for NetBSD core files. If the note type is less
6799 than the start of the machine-dependent note types, we don't
6802 if (note->type < NT_NETBSDCORE_FIRSTMACH)
6806 switch (bfd_get_arch (abfd))
6808 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
6809 PT_GETFPREGS == mach+2. */
6811 case bfd_arch_alpha:
6812 case bfd_arch_sparc:
6815 case NT_NETBSDCORE_FIRSTMACH+0:
6816 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6818 case NT_NETBSDCORE_FIRSTMACH+2:
6819 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6825 /* On all other arch's, PT_GETREGS == mach+1 and
6826 PT_GETFPREGS == mach+3. */
6831 case NT_NETBSDCORE_FIRSTMACH+1:
6832 return elfcore_make_note_pseudosection (abfd, ".reg", note);
6834 case NT_NETBSDCORE_FIRSTMACH+3:
6835 return elfcore_make_note_pseudosection (abfd, ".reg2", note);
6844 /* Function: elfcore_write_note
6851 size of data for note
6854 End of buffer containing note. */
6857 elfcore_write_note (abfd, buf, bufsiz, name, type, input, size)
6866 Elf_External_Note *xnp;
6876 struct elf_backend_data *bed;
6878 namesz = strlen (name) + 1;
6879 bed = get_elf_backend_data (abfd);
6880 pad = -namesz & (bed->s->file_align - 1);
6883 newspace = sizeof (Elf_External_Note) - 1 + namesz + pad + size;
6885 p = realloc (buf, *bufsiz + newspace);
6887 *bufsiz += newspace;
6888 xnp = (Elf_External_Note *) dest;
6889 H_PUT_32 (abfd, namesz, xnp->namesz);
6890 H_PUT_32 (abfd, size, xnp->descsz);
6891 H_PUT_32 (abfd, type, xnp->type);
6895 memcpy (dest, name, namesz);
6903 memcpy (dest, input, size);
6907 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
6909 elfcore_write_prpsinfo (abfd, buf, bufsiz, fname, psargs)
6917 char *note_name = "CORE";
6919 #if defined (HAVE_PSINFO_T)
6921 note_type = NT_PSINFO;
6924 note_type = NT_PRPSINFO;
6927 memset (&data, 0, sizeof (data));
6928 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
6929 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
6930 return elfcore_write_note (abfd, buf, bufsiz,
6931 note_name, note_type, &data, sizeof (data));
6933 #endif /* PSINFO_T or PRPSINFO_T */
6935 #if defined (HAVE_PRSTATUS_T)
6937 elfcore_write_prstatus (abfd, buf, bufsiz, pid, cursig, gregs)
6946 char *note_name = "CORE";
6948 memset (&prstat, 0, sizeof (prstat));
6949 prstat.pr_pid = pid;
6950 prstat.pr_cursig = cursig;
6951 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
6952 return elfcore_write_note (abfd, buf, bufsiz,
6953 note_name, NT_PRSTATUS, &prstat, sizeof (prstat));
6955 #endif /* HAVE_PRSTATUS_T */
6957 #if defined (HAVE_LWPSTATUS_T)
6959 elfcore_write_lwpstatus (abfd, buf, bufsiz, pid, cursig, gregs)
6967 lwpstatus_t lwpstat;
6968 char *note_name = "CORE";
6970 memset (&lwpstat, 0, sizeof (lwpstat));
6971 lwpstat.pr_lwpid = pid >> 16;
6972 lwpstat.pr_cursig = cursig;
6973 #if defined (HAVE_LWPSTATUS_T_PR_REG)
6974 memcpy (lwpstat.pr_reg, gregs, sizeof (lwpstat.pr_reg));
6975 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
6977 memcpy (lwpstat.pr_context.uc_mcontext.gregs,
6978 gregs, sizeof (lwpstat.pr_context.uc_mcontext.gregs));
6980 memcpy (lwpstat.pr_context.uc_mcontext.__gregs,
6981 gregs, sizeof (lwpstat.pr_context.uc_mcontext.__gregs));
6984 return elfcore_write_note (abfd, buf, bufsiz, note_name,
6985 NT_LWPSTATUS, &lwpstat, sizeof (lwpstat));
6987 #endif /* HAVE_LWPSTATUS_T */
6989 #if defined (HAVE_PSTATUS_T)
6991 elfcore_write_pstatus (abfd, buf, bufsiz, pid, cursig, gregs)
7000 char *note_name = "CORE";
7002 memset (&pstat, 0, sizeof (pstat));
7003 pstat.pr_pid = pid & 0xffff;
7004 buf = elfcore_write_note (abfd, buf, bufsiz, note_name,
7005 NT_PSTATUS, &pstat, sizeof (pstat));
7008 #endif /* HAVE_PSTATUS_T */
7011 elfcore_write_prfpreg (abfd, buf, bufsiz, fpregs, size)
7018 char *note_name = "CORE";
7019 return elfcore_write_note (abfd, buf, bufsiz,
7020 note_name, NT_FPREGSET, fpregs, size);
7024 elfcore_write_prxfpreg (abfd, buf, bufsiz, xfpregs, size)
7031 char *note_name = "LINUX";
7032 return elfcore_write_note (abfd, buf, bufsiz,
7033 note_name, NT_PRXFPREG, xfpregs, size);
7037 elfcore_read_notes (abfd, offset, size)
7048 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
7051 buf = bfd_malloc (size);
7055 if (bfd_bread (buf, size, abfd) != size)
7063 while (p < buf + size)
7065 /* FIXME: bad alignment assumption. */
7066 Elf_External_Note *xnp = (Elf_External_Note *) p;
7067 Elf_Internal_Note in;
7069 in.type = H_GET_32 (abfd, xnp->type);
7071 in.namesz = H_GET_32 (abfd, xnp->namesz);
7072 in.namedata = xnp->name;
7074 in.descsz = H_GET_32 (abfd, xnp->descsz);
7075 in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
7076 in.descpos = offset + (in.descdata - buf);
7078 if (strncmp (in.namedata, "NetBSD-CORE", 11) == 0)
7080 if (! elfcore_grok_netbsd_note (abfd, &in))
7085 if (! elfcore_grok_note (abfd, &in))
7089 p = in.descdata + BFD_ALIGN (in.descsz, 4);
7096 /* Providing external access to the ELF program header table. */
7098 /* Return an upper bound on the number of bytes required to store a
7099 copy of ABFD's program header table entries. Return -1 if an error
7100 occurs; bfd_get_error will return an appropriate code. */
7103 bfd_get_elf_phdr_upper_bound (abfd)
7106 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7108 bfd_set_error (bfd_error_wrong_format);
7112 return elf_elfheader (abfd)->e_phnum * sizeof (Elf_Internal_Phdr);
7115 /* Copy ABFD's program header table entries to *PHDRS. The entries
7116 will be stored as an array of Elf_Internal_Phdr structures, as
7117 defined in include/elf/internal.h. To find out how large the
7118 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7120 Return the number of program header table entries read, or -1 if an
7121 error occurs; bfd_get_error will return an appropriate code. */
7124 bfd_get_elf_phdrs (abfd, phdrs)
7130 if (abfd->xvec->flavour != bfd_target_elf_flavour)
7132 bfd_set_error (bfd_error_wrong_format);
7136 num_phdrs = elf_elfheader (abfd)->e_phnum;
7137 memcpy (phdrs, elf_tdata (abfd)->phdr,
7138 num_phdrs * sizeof (Elf_Internal_Phdr));
7144 _bfd_elf_sprintf_vma (abfd, buf, value)
7145 bfd *abfd ATTRIBUTE_UNUSED;
7150 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7152 i_ehdrp = elf_elfheader (abfd);
7153 if (i_ehdrp == NULL)
7154 sprintf_vma (buf, value);
7157 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7159 #if BFD_HOST_64BIT_LONG
7160 sprintf (buf, "%016lx", value);
7162 sprintf (buf, "%08lx%08lx", _bfd_int64_high (value),
7163 _bfd_int64_low (value));
7167 sprintf (buf, "%08lx", (unsigned long) (value & 0xffffffff));
7170 sprintf_vma (buf, value);
7175 _bfd_elf_fprintf_vma (abfd, stream, value)
7176 bfd *abfd ATTRIBUTE_UNUSED;
7181 Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
7183 i_ehdrp = elf_elfheader (abfd);
7184 if (i_ehdrp == NULL)
7185 fprintf_vma ((FILE *) stream, value);
7188 if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
7190 #if BFD_HOST_64BIT_LONG
7191 fprintf ((FILE *) stream, "%016lx", value);
7193 fprintf ((FILE *) stream, "%08lx%08lx",
7194 _bfd_int64_high (value), _bfd_int64_low (value));
7198 fprintf ((FILE *) stream, "%08lx",
7199 (unsigned long) (value & 0xffffffff));
7202 fprintf_vma ((FILE *) stream, value);
7206 enum elf_reloc_type_class
7207 _bfd_elf_reloc_type_class (rela)
7208 const Elf_Internal_Rela *rela ATTRIBUTE_UNUSED;
7210 return reloc_class_normal;
7213 /* For RELA architectures, return the relocation value for a
7214 relocation against a local symbol. */
7217 _bfd_elf_rela_local_sym (abfd, sym, sec, rel)
7219 Elf_Internal_Sym *sym;
7221 Elf_Internal_Rela *rel;
7225 relocation = (sec->output_section->vma
7226 + sec->output_offset
7228 if ((sec->flags & SEC_MERGE)
7229 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
7230 && elf_section_data (sec)->sec_info_type == ELF_INFO_TYPE_MERGE)
7236 _bfd_merged_section_offset (abfd, &msec,
7237 elf_section_data (sec)->sec_info,
7238 sym->st_value + rel->r_addend,
7241 rel->r_addend += msec->output_section->vma + msec->output_offset;
7247 _bfd_elf_rel_local_sym (abfd, sym, psec, addend)
7249 Elf_Internal_Sym *sym;
7253 asection *sec = *psec;
7255 if (elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE)
7256 return sym->st_value + addend;
7258 return _bfd_merged_section_offset (abfd, psec,
7259 elf_section_data (sec)->sec_info,
7260 sym->st_value + addend, (bfd_vma) 0);
7264 _bfd_elf_section_offset (abfd, info, sec, offset)
7266 struct bfd_link_info *info;
7270 struct bfd_elf_section_data *sec_data;
7272 sec_data = elf_section_data (sec);
7273 switch (sec_data->sec_info_type)
7275 case ELF_INFO_TYPE_STABS:
7276 return _bfd_stab_section_offset
7277 (abfd, &elf_hash_table (info)->merge_info, sec, &sec_data->sec_info,
7279 case ELF_INFO_TYPE_EH_FRAME:
7280 return _bfd_elf_eh_frame_section_offset (abfd, sec, offset);