5626 lines
149 KiB
C
5626 lines
149 KiB
C
/* ELF executable support for BFD.
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Copyright 1993, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* $FreeBSD$ */
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/*
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SECTION
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ELF backends
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BFD support for ELF formats is being worked on.
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Currently, the best supported back ends are for sparc and i386
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(running svr4 or Solaris 2).
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Documentation of the internals of the support code still needs
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to be written. The code is changing quickly enough that we
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haven't bothered yet.
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*/
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#define ARCH_SIZE 0
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#include "elf-bfd.h"
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static INLINE struct elf_segment_map *make_mapping
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PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean));
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static boolean map_sections_to_segments PARAMS ((bfd *));
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static int elf_sort_sections PARAMS ((const PTR, const PTR));
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static boolean assign_file_positions_for_segments PARAMS ((bfd *));
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static boolean assign_file_positions_except_relocs PARAMS ((bfd *));
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static boolean prep_headers PARAMS ((bfd *));
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static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **, int));
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static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *));
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static char *elf_read PARAMS ((bfd *, long, unsigned int));
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static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
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static boolean assign_section_numbers PARAMS ((bfd *));
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static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
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static boolean elf_map_symbols PARAMS ((bfd *));
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static bfd_size_type get_program_header_size PARAMS ((bfd *));
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static boolean elfcore_read_notes PARAMS ((bfd *, bfd_vma, bfd_vma));
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/* Swap version information in and out. The version information is
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currently size independent. If that ever changes, this code will
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need to move into elfcode.h. */
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/* Swap in a Verdef structure. */
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void
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_bfd_elf_swap_verdef_in (abfd, src, dst)
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bfd *abfd;
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const Elf_External_Verdef *src;
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Elf_Internal_Verdef *dst;
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{
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dst->vd_version = bfd_h_get_16 (abfd, src->vd_version);
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dst->vd_flags = bfd_h_get_16 (abfd, src->vd_flags);
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dst->vd_ndx = bfd_h_get_16 (abfd, src->vd_ndx);
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dst->vd_cnt = bfd_h_get_16 (abfd, src->vd_cnt);
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dst->vd_hash = bfd_h_get_32 (abfd, src->vd_hash);
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dst->vd_aux = bfd_h_get_32 (abfd, src->vd_aux);
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dst->vd_next = bfd_h_get_32 (abfd, src->vd_next);
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}
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/* Swap out a Verdef structure. */
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void
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_bfd_elf_swap_verdef_out (abfd, src, dst)
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bfd *abfd;
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const Elf_Internal_Verdef *src;
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Elf_External_Verdef *dst;
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{
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bfd_h_put_16 (abfd, src->vd_version, dst->vd_version);
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bfd_h_put_16 (abfd, src->vd_flags, dst->vd_flags);
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bfd_h_put_16 (abfd, src->vd_ndx, dst->vd_ndx);
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bfd_h_put_16 (abfd, src->vd_cnt, dst->vd_cnt);
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bfd_h_put_32 (abfd, src->vd_hash, dst->vd_hash);
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bfd_h_put_32 (abfd, src->vd_aux, dst->vd_aux);
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bfd_h_put_32 (abfd, src->vd_next, dst->vd_next);
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}
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/* Swap in a Verdaux structure. */
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void
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_bfd_elf_swap_verdaux_in (abfd, src, dst)
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bfd *abfd;
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const Elf_External_Verdaux *src;
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Elf_Internal_Verdaux *dst;
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{
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dst->vda_name = bfd_h_get_32 (abfd, src->vda_name);
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dst->vda_next = bfd_h_get_32 (abfd, src->vda_next);
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}
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/* Swap out a Verdaux structure. */
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void
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_bfd_elf_swap_verdaux_out (abfd, src, dst)
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bfd *abfd;
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const Elf_Internal_Verdaux *src;
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Elf_External_Verdaux *dst;
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{
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bfd_h_put_32 (abfd, src->vda_name, dst->vda_name);
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bfd_h_put_32 (abfd, src->vda_next, dst->vda_next);
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}
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/* Swap in a Verneed structure. */
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void
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_bfd_elf_swap_verneed_in (abfd, src, dst)
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bfd *abfd;
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const Elf_External_Verneed *src;
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Elf_Internal_Verneed *dst;
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{
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dst->vn_version = bfd_h_get_16 (abfd, src->vn_version);
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dst->vn_cnt = bfd_h_get_16 (abfd, src->vn_cnt);
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dst->vn_file = bfd_h_get_32 (abfd, src->vn_file);
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dst->vn_aux = bfd_h_get_32 (abfd, src->vn_aux);
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dst->vn_next = bfd_h_get_32 (abfd, src->vn_next);
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}
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/* Swap out a Verneed structure. */
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void
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_bfd_elf_swap_verneed_out (abfd, src, dst)
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bfd *abfd;
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const Elf_Internal_Verneed *src;
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Elf_External_Verneed *dst;
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{
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bfd_h_put_16 (abfd, src->vn_version, dst->vn_version);
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bfd_h_put_16 (abfd, src->vn_cnt, dst->vn_cnt);
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bfd_h_put_32 (abfd, src->vn_file, dst->vn_file);
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bfd_h_put_32 (abfd, src->vn_aux, dst->vn_aux);
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bfd_h_put_32 (abfd, src->vn_next, dst->vn_next);
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}
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/* Swap in a Vernaux structure. */
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void
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_bfd_elf_swap_vernaux_in (abfd, src, dst)
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bfd *abfd;
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const Elf_External_Vernaux *src;
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Elf_Internal_Vernaux *dst;
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{
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dst->vna_hash = bfd_h_get_32 (abfd, src->vna_hash);
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dst->vna_flags = bfd_h_get_16 (abfd, src->vna_flags);
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dst->vna_other = bfd_h_get_16 (abfd, src->vna_other);
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dst->vna_name = bfd_h_get_32 (abfd, src->vna_name);
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dst->vna_next = bfd_h_get_32 (abfd, src->vna_next);
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}
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/* Swap out a Vernaux structure. */
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void
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_bfd_elf_swap_vernaux_out (abfd, src, dst)
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bfd *abfd;
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const Elf_Internal_Vernaux *src;
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Elf_External_Vernaux *dst;
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{
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bfd_h_put_32 (abfd, src->vna_hash, dst->vna_hash);
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bfd_h_put_16 (abfd, src->vna_flags, dst->vna_flags);
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bfd_h_put_16 (abfd, src->vna_other, dst->vna_other);
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bfd_h_put_32 (abfd, src->vna_name, dst->vna_name);
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bfd_h_put_32 (abfd, src->vna_next, dst->vna_next);
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}
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/* Swap in a Versym structure. */
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void
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_bfd_elf_swap_versym_in (abfd, src, dst)
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bfd *abfd;
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const Elf_External_Versym *src;
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Elf_Internal_Versym *dst;
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{
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dst->vs_vers = bfd_h_get_16 (abfd, src->vs_vers);
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}
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/* Swap out a Versym structure. */
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void
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_bfd_elf_swap_versym_out (abfd, src, dst)
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bfd *abfd;
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const Elf_Internal_Versym *src;
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Elf_External_Versym *dst;
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{
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bfd_h_put_16 (abfd, src->vs_vers, dst->vs_vers);
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}
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/* Standard ELF hash function. Do not change this function; you will
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cause invalid hash tables to be generated. */
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unsigned long
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bfd_elf_hash (namearg)
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const char *namearg;
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{
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const unsigned char *name = (const unsigned char *) namearg;
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unsigned long h = 0;
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unsigned long g;
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int ch;
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while ((ch = *name++) != '\0')
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{
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h = (h << 4) + ch;
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if ((g = (h & 0xf0000000)) != 0)
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{
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h ^= g >> 24;
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/* The ELF ABI says `h &= ~g', but this is equivalent in
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this case and on some machines one insn instead of two. */
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h ^= g;
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}
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}
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return h;
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}
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/* Read a specified number of bytes at a specified offset in an ELF
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file, into a newly allocated buffer, and return a pointer to the
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buffer. */
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static char *
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elf_read (abfd, offset, size)
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bfd * abfd;
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long offset;
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unsigned int size;
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{
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char *buf;
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if ((buf = bfd_alloc (abfd, size)) == NULL)
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return NULL;
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if (bfd_seek (abfd, offset, SEEK_SET) == -1)
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return NULL;
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if (bfd_read ((PTR) buf, size, 1, abfd) != size)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_file_truncated);
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return NULL;
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}
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return buf;
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}
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boolean
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bfd_elf_mkobject (abfd)
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bfd * abfd;
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{
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/* this just does initialization */
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/* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
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elf_tdata (abfd) = (struct elf_obj_tdata *)
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bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
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if (elf_tdata (abfd) == 0)
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return false;
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/* since everything is done at close time, do we need any
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initialization? */
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return true;
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}
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boolean
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bfd_elf_mkcorefile (abfd)
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bfd * abfd;
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{
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/* I think this can be done just like an object file. */
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return bfd_elf_mkobject (abfd);
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}
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char *
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bfd_elf_get_str_section (abfd, shindex)
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bfd * abfd;
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unsigned int shindex;
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{
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Elf_Internal_Shdr **i_shdrp;
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char *shstrtab = NULL;
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unsigned int offset;
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unsigned int shstrtabsize;
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i_shdrp = elf_elfsections (abfd);
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if (i_shdrp == 0 || i_shdrp[shindex] == 0)
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return 0;
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shstrtab = (char *) i_shdrp[shindex]->contents;
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if (shstrtab == NULL)
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{
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/* No cached one, attempt to read, and cache what we read. */
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offset = i_shdrp[shindex]->sh_offset;
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shstrtabsize = i_shdrp[shindex]->sh_size;
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shstrtab = elf_read (abfd, offset, shstrtabsize);
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i_shdrp[shindex]->contents = (PTR) shstrtab;
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}
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return shstrtab;
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}
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char *
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bfd_elf_string_from_elf_section (abfd, shindex, strindex)
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bfd * abfd;
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unsigned int shindex;
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unsigned int strindex;
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{
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Elf_Internal_Shdr *hdr;
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if (strindex == 0)
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return "";
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hdr = elf_elfsections (abfd)[shindex];
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if (hdr->contents == NULL
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&& bfd_elf_get_str_section (abfd, shindex) == NULL)
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return NULL;
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if (strindex >= hdr->sh_size)
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{
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(*_bfd_error_handler)
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(_("%s: invalid string offset %u >= %lu for section `%s'"),
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bfd_get_filename (abfd), strindex, (unsigned long) hdr->sh_size,
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((shindex == elf_elfheader(abfd)->e_shstrndx
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&& strindex == hdr->sh_name)
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? ".shstrtab"
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: elf_string_from_elf_strtab (abfd, hdr->sh_name)));
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return "";
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}
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return ((char *) hdr->contents) + strindex;
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}
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/* Make a BFD section from an ELF section. We store a pointer to the
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BFD section in the bfd_section field of the header. */
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boolean
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_bfd_elf_make_section_from_shdr (abfd, hdr, name)
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bfd *abfd;
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Elf_Internal_Shdr *hdr;
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const char *name;
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{
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asection *newsect;
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flagword flags;
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if (hdr->bfd_section != NULL)
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{
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BFD_ASSERT (strcmp (name,
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bfd_get_section_name (abfd, hdr->bfd_section)) == 0);
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return true;
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}
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newsect = bfd_make_section_anyway (abfd, name);
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if (newsect == NULL)
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return false;
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newsect->filepos = hdr->sh_offset;
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if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr)
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|| ! bfd_set_section_size (abfd, newsect, hdr->sh_size)
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|| ! bfd_set_section_alignment (abfd, newsect,
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bfd_log2 (hdr->sh_addralign)))
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return false;
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flags = SEC_NO_FLAGS;
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if (hdr->sh_type != SHT_NOBITS)
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flags |= SEC_HAS_CONTENTS;
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if ((hdr->sh_flags & SHF_ALLOC) != 0)
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{
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flags |= SEC_ALLOC;
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if (hdr->sh_type != SHT_NOBITS)
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flags |= SEC_LOAD;
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}
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if ((hdr->sh_flags & SHF_WRITE) == 0)
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flags |= SEC_READONLY;
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if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
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flags |= SEC_CODE;
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else if ((flags & SEC_LOAD) != 0)
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flags |= SEC_DATA;
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/* The debugging sections appear to be recognized only by name, not
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any sort of flag. */
|
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if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
|
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|| strncmp (name, ".line", sizeof ".line" - 1) == 0
|
||
|| strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
|
||
flags |= SEC_DEBUGGING;
|
||
|
||
/* As a GNU extension, if the name begins with .gnu.linkonce, we
|
||
only link a single copy of the section. This is used to support
|
||
g++. g++ will emit each template expansion in its own section.
|
||
The symbols will be defined as weak, so that multiple definitions
|
||
are permitted. The GNU linker extension is to actually discard
|
||
all but one of the sections. */
|
||
if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0)
|
||
flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
|
||
|
||
if (! bfd_set_section_flags (abfd, newsect, flags))
|
||
return false;
|
||
|
||
if ((flags & SEC_ALLOC) != 0)
|
||
{
|
||
Elf_Internal_Phdr *phdr;
|
||
unsigned int i;
|
||
|
||
/* Look through the phdrs to see if we need to adjust the lma.
|
||
If all the p_paddr fields are zero, we ignore them, since
|
||
some ELF linkers produce such output. */
|
||
phdr = elf_tdata (abfd)->phdr;
|
||
for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
|
||
{
|
||
if (phdr->p_paddr != 0)
|
||
break;
|
||
}
|
||
if (i < elf_elfheader (abfd)->e_phnum)
|
||
{
|
||
phdr = elf_tdata (abfd)->phdr;
|
||
for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++)
|
||
{
|
||
if (phdr->p_type == PT_LOAD
|
||
&& phdr->p_vaddr != phdr->p_paddr
|
||
&& phdr->p_vaddr <= hdr->sh_addr
|
||
&& (phdr->p_vaddr + phdr->p_memsz
|
||
>= hdr->sh_addr + hdr->sh_size)
|
||
&& ((flags & SEC_LOAD) == 0
|
||
|| (phdr->p_offset <= (bfd_vma) hdr->sh_offset
|
||
&& (phdr->p_offset + phdr->p_filesz
|
||
>= hdr->sh_offset + hdr->sh_size))))
|
||
{
|
||
newsect->lma += phdr->p_paddr - phdr->p_vaddr;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
hdr->bfd_section = newsect;
|
||
elf_section_data (newsect)->this_hdr = *hdr;
|
||
|
||
return true;
|
||
}
|
||
|
||
/*
|
||
INTERNAL_FUNCTION
|
||
bfd_elf_find_section
|
||
|
||
SYNOPSIS
|
||
struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
|
||
|
||
DESCRIPTION
|
||
Helper functions for GDB to locate the string tables.
|
||
Since BFD hides string tables from callers, GDB needs to use an
|
||
internal hook to find them. Sun's .stabstr, in particular,
|
||
isn't even pointed to by the .stab section, so ordinary
|
||
mechanisms wouldn't work to find it, even if we had some.
|
||
*/
|
||
|
||
struct elf_internal_shdr *
|
||
bfd_elf_find_section (abfd, name)
|
||
bfd * abfd;
|
||
char *name;
|
||
{
|
||
Elf_Internal_Shdr **i_shdrp;
|
||
char *shstrtab;
|
||
unsigned int max;
|
||
unsigned int i;
|
||
|
||
i_shdrp = elf_elfsections (abfd);
|
||
if (i_shdrp != NULL)
|
||
{
|
||
shstrtab = bfd_elf_get_str_section
|
||
(abfd, elf_elfheader (abfd)->e_shstrndx);
|
||
if (shstrtab != NULL)
|
||
{
|
||
max = elf_elfheader (abfd)->e_shnum;
|
||
for (i = 1; i < max; i++)
|
||
if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name))
|
||
return i_shdrp[i];
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
const char *const bfd_elf_section_type_names[] = {
|
||
"SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
|
||
"SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
|
||
"SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
|
||
};
|
||
|
||
/* ELF relocs are against symbols. If we are producing relocateable
|
||
output, and the reloc is against an external symbol, and nothing
|
||
has given us any additional addend, the resulting reloc will also
|
||
be against the same symbol. In such a case, we don't want to
|
||
change anything about the way the reloc is handled, since it will
|
||
all be done at final link time. Rather than put special case code
|
||
into bfd_perform_relocation, all the reloc types use this howto
|
||
function. It just short circuits the reloc if producing
|
||
relocateable output against an external symbol. */
|
||
|
||
/*ARGSUSED*/
|
||
bfd_reloc_status_type
|
||
bfd_elf_generic_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data ATTRIBUTE_UNUSED;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! reloc_entry->howto->partial_inplace
|
||
|| reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* Print out the program headers. */
|
||
|
||
boolean
|
||
_bfd_elf_print_private_bfd_data (abfd, farg)
|
||
bfd *abfd;
|
||
PTR farg;
|
||
{
|
||
FILE *f = (FILE *) farg;
|
||
Elf_Internal_Phdr *p;
|
||
asection *s;
|
||
bfd_byte *dynbuf = NULL;
|
||
|
||
p = elf_tdata (abfd)->phdr;
|
||
if (p != NULL)
|
||
{
|
||
unsigned int i, c;
|
||
|
||
fprintf (f, _("\nProgram Header:\n"));
|
||
c = elf_elfheader (abfd)->e_phnum;
|
||
for (i = 0; i < c; i++, p++)
|
||
{
|
||
const char *s;
|
||
char buf[20];
|
||
|
||
switch (p->p_type)
|
||
{
|
||
case PT_NULL: s = "NULL"; break;
|
||
case PT_LOAD: s = "LOAD"; break;
|
||
case PT_DYNAMIC: s = "DYNAMIC"; break;
|
||
case PT_INTERP: s = "INTERP"; break;
|
||
case PT_NOTE: s = "NOTE"; break;
|
||
case PT_SHLIB: s = "SHLIB"; break;
|
||
case PT_PHDR: s = "PHDR"; break;
|
||
default: sprintf (buf, "0x%lx", p->p_type); s = buf; break;
|
||
}
|
||
fprintf (f, "%8s off 0x", s);
|
||
fprintf_vma (f, p->p_offset);
|
||
fprintf (f, " vaddr 0x");
|
||
fprintf_vma (f, p->p_vaddr);
|
||
fprintf (f, " paddr 0x");
|
||
fprintf_vma (f, p->p_paddr);
|
||
fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align));
|
||
fprintf (f, " filesz 0x");
|
||
fprintf_vma (f, p->p_filesz);
|
||
fprintf (f, " memsz 0x");
|
||
fprintf_vma (f, p->p_memsz);
|
||
fprintf (f, " flags %c%c%c",
|
||
(p->p_flags & PF_R) != 0 ? 'r' : '-',
|
||
(p->p_flags & PF_W) != 0 ? 'w' : '-',
|
||
(p->p_flags & PF_X) != 0 ? 'x' : '-');
|
||
if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0)
|
||
fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X));
|
||
fprintf (f, "\n");
|
||
}
|
||
}
|
||
|
||
s = bfd_get_section_by_name (abfd, ".dynamic");
|
||
if (s != NULL)
|
||
{
|
||
int elfsec;
|
||
unsigned long link;
|
||
bfd_byte *extdyn, *extdynend;
|
||
size_t extdynsize;
|
||
void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
|
||
|
||
fprintf (f, _("\nDynamic Section:\n"));
|
||
|
||
dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
|
||
if (dynbuf == NULL)
|
||
goto error_return;
|
||
if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
|
||
s->_raw_size))
|
||
goto error_return;
|
||
|
||
elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
|
||
if (elfsec == -1)
|
||
goto error_return;
|
||
link = elf_elfsections (abfd)[elfsec]->sh_link;
|
||
|
||
extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
|
||
swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
|
||
|
||
extdyn = dynbuf;
|
||
extdynend = extdyn + s->_raw_size;
|
||
for (; extdyn < extdynend; extdyn += extdynsize)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
const char *name;
|
||
char ab[20];
|
||
boolean stringp;
|
||
|
||
(*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
|
||
|
||
if (dyn.d_tag == DT_NULL)
|
||
break;
|
||
|
||
stringp = false;
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag);
|
||
name = ab;
|
||
break;
|
||
|
||
case DT_NEEDED: name = "NEEDED"; stringp = true; break;
|
||
case DT_PLTRELSZ: name = "PLTRELSZ"; break;
|
||
case DT_PLTGOT: name = "PLTGOT"; break;
|
||
case DT_HASH: name = "HASH"; break;
|
||
case DT_STRTAB: name = "STRTAB"; break;
|
||
case DT_SYMTAB: name = "SYMTAB"; break;
|
||
case DT_RELA: name = "RELA"; break;
|
||
case DT_RELASZ: name = "RELASZ"; break;
|
||
case DT_RELAENT: name = "RELAENT"; break;
|
||
case DT_STRSZ: name = "STRSZ"; break;
|
||
case DT_SYMENT: name = "SYMENT"; break;
|
||
case DT_INIT: name = "INIT"; break;
|
||
case DT_FINI: name = "FINI"; break;
|
||
case DT_SONAME: name = "SONAME"; stringp = true; break;
|
||
case DT_RPATH: name = "RPATH"; stringp = true; break;
|
||
case DT_SYMBOLIC: name = "SYMBOLIC"; break;
|
||
case DT_REL: name = "REL"; break;
|
||
case DT_RELSZ: name = "RELSZ"; break;
|
||
case DT_RELENT: name = "RELENT"; break;
|
||
case DT_PLTREL: name = "PLTREL"; break;
|
||
case DT_DEBUG: name = "DEBUG"; break;
|
||
case DT_TEXTREL: name = "TEXTREL"; break;
|
||
case DT_JMPREL: name = "JMPREL"; break;
|
||
case DT_AUXILIARY: name = "AUXILIARY"; stringp = true; break;
|
||
case DT_FILTER: name = "FILTER"; stringp = true; break;
|
||
case DT_VERSYM: name = "VERSYM"; break;
|
||
case DT_VERDEF: name = "VERDEF"; break;
|
||
case DT_VERDEFNUM: name = "VERDEFNUM"; break;
|
||
case DT_VERNEED: name = "VERNEED"; break;
|
||
case DT_VERNEEDNUM: name = "VERNEEDNUM"; break;
|
||
}
|
||
|
||
fprintf (f, " %-11s ", name);
|
||
if (! stringp)
|
||
fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val);
|
||
else
|
||
{
|
||
const char *string;
|
||
|
||
string = bfd_elf_string_from_elf_section (abfd, link,
|
||
dyn.d_un.d_val);
|
||
if (string == NULL)
|
||
goto error_return;
|
||
fprintf (f, "%s", string);
|
||
}
|
||
fprintf (f, "\n");
|
||
}
|
||
|
||
free (dynbuf);
|
||
dynbuf = NULL;
|
||
}
|
||
|
||
if ((elf_dynverdef (abfd) != 0 && elf_tdata (abfd)->verdef == NULL)
|
||
|| (elf_dynverref (abfd) != 0 && elf_tdata (abfd)->verref == NULL))
|
||
{
|
||
if (! _bfd_elf_slurp_version_tables (abfd))
|
||
return false;
|
||
}
|
||
|
||
if (elf_dynverdef (abfd) != 0)
|
||
{
|
||
Elf_Internal_Verdef *t;
|
||
|
||
fprintf (f, _("\nVersion definitions:\n"));
|
||
for (t = elf_tdata (abfd)->verdef; t != NULL; t = t->vd_nextdef)
|
||
{
|
||
fprintf (f, "%d 0x%2.2x 0x%8.8lx %s\n", t->vd_ndx,
|
||
t->vd_flags, t->vd_hash, t->vd_nodename);
|
||
if (t->vd_auxptr->vda_nextptr != NULL)
|
||
{
|
||
Elf_Internal_Verdaux *a;
|
||
|
||
fprintf (f, "\t");
|
||
for (a = t->vd_auxptr->vda_nextptr;
|
||
a != NULL;
|
||
a = a->vda_nextptr)
|
||
fprintf (f, "%s ", a->vda_nodename);
|
||
fprintf (f, "\n");
|
||
}
|
||
}
|
||
}
|
||
|
||
if (elf_dynverref (abfd) != 0)
|
||
{
|
||
Elf_Internal_Verneed *t;
|
||
|
||
fprintf (f, _("\nVersion References:\n"));
|
||
for (t = elf_tdata (abfd)->verref; t != NULL; t = t->vn_nextref)
|
||
{
|
||
Elf_Internal_Vernaux *a;
|
||
|
||
fprintf (f, _(" required from %s:\n"), t->vn_filename);
|
||
for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
|
||
fprintf (f, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a->vna_hash,
|
||
a->vna_flags, a->vna_other, a->vna_nodename);
|
||
}
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (dynbuf != NULL)
|
||
free (dynbuf);
|
||
return false;
|
||
}
|
||
|
||
/* Display ELF-specific fields of a symbol. */
|
||
|
||
void
|
||
bfd_elf_print_symbol (abfd, filep, symbol, how)
|
||
bfd *abfd;
|
||
PTR filep;
|
||
asymbol *symbol;
|
||
bfd_print_symbol_type how;
|
||
{
|
||
FILE *file = (FILE *) filep;
|
||
switch (how)
|
||
{
|
||
case bfd_print_symbol_name:
|
||
fprintf (file, "%s", symbol->name);
|
||
break;
|
||
case bfd_print_symbol_more:
|
||
fprintf (file, "elf ");
|
||
fprintf_vma (file, symbol->value);
|
||
fprintf (file, " %lx", (long) symbol->flags);
|
||
break;
|
||
case bfd_print_symbol_all:
|
||
{
|
||
CONST char *section_name;
|
||
CONST char *name = NULL;
|
||
struct elf_backend_data *bed;
|
||
unsigned char st_other;
|
||
|
||
section_name = symbol->section ? symbol->section->name : "(*none*)";
|
||
|
||
bed = get_elf_backend_data (abfd);
|
||
if (bed->elf_backend_print_symbol_all)
|
||
name = (*bed->elf_backend_print_symbol_all) (abfd, filep, symbol);
|
||
|
||
if (name == NULL)
|
||
{
|
||
name = symbol->name;
|
||
bfd_print_symbol_vandf ((PTR) file, symbol);
|
||
}
|
||
|
||
fprintf (file, " %s\t", section_name);
|
||
/* Print the "other" value for a symbol. For common symbols,
|
||
we've already printed the size; now print the alignment.
|
||
For other symbols, we have no specified alignment, and
|
||
we've printed the address; now print the size. */
|
||
fprintf_vma (file,
|
||
(bfd_is_com_section (symbol->section)
|
||
? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value
|
||
: ((elf_symbol_type *) symbol)->internal_elf_sym.st_size));
|
||
|
||
/* If we have version information, print it. */
|
||
if (elf_tdata (abfd)->dynversym_section != 0
|
||
&& (elf_tdata (abfd)->dynverdef_section != 0
|
||
|| elf_tdata (abfd)->dynverref_section != 0))
|
||
{
|
||
unsigned int vernum;
|
||
const char *version_string;
|
||
|
||
vernum = ((elf_symbol_type *) symbol)->version & VERSYM_VERSION;
|
||
|
||
if (vernum == 0)
|
||
version_string = "";
|
||
else if (vernum == 1)
|
||
version_string = "Base";
|
||
else if (vernum <= elf_tdata (abfd)->cverdefs)
|
||
version_string =
|
||
elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
|
||
else
|
||
{
|
||
Elf_Internal_Verneed *t;
|
||
|
||
version_string = "";
|
||
for (t = elf_tdata (abfd)->verref;
|
||
t != NULL;
|
||
t = t->vn_nextref)
|
||
{
|
||
Elf_Internal_Vernaux *a;
|
||
|
||
for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
|
||
{
|
||
if (a->vna_other == vernum)
|
||
{
|
||
version_string = a->vna_nodename;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if ((((elf_symbol_type *) symbol)->version & VERSYM_HIDDEN) == 0)
|
||
fprintf (file, " %-11s", version_string);
|
||
else
|
||
{
|
||
int i;
|
||
|
||
fprintf (file, " (%s)", version_string);
|
||
for (i = 10 - strlen (version_string); i > 0; --i)
|
||
putc (' ', file);
|
||
}
|
||
}
|
||
|
||
/* If the st_other field is not zero, print it. */
|
||
st_other = ((elf_symbol_type *) symbol)->internal_elf_sym.st_other;
|
||
|
||
switch (st_other)
|
||
{
|
||
case 0: break;
|
||
case STV_INTERNAL: fprintf (file, " .internal"); break;
|
||
case STV_HIDDEN: fprintf (file, " .hidden"); break;
|
||
case STV_PROTECTED: fprintf (file, " .protected"); break;
|
||
default:
|
||
/* Some other non-defined flags are also present, so print
|
||
everything hex. */
|
||
fprintf (file, " 0x%02x", (unsigned int) st_other);
|
||
}
|
||
|
||
fprintf (file, " %s", name);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Create an entry in an ELF linker hash table. */
|
||
|
||
struct bfd_hash_entry *
|
||
_bfd_elf_link_hash_newfunc (entry, table, string)
|
||
struct bfd_hash_entry *entry;
|
||
struct bfd_hash_table *table;
|
||
const char *string;
|
||
{
|
||
struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct elf_link_hash_entry *) NULL)
|
||
ret = ((struct elf_link_hash_entry *)
|
||
bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)));
|
||
if (ret == (struct elf_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct elf_link_hash_entry *)
|
||
_bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct elf_link_hash_entry *) NULL)
|
||
{
|
||
/* Set local fields. */
|
||
ret->indx = -1;
|
||
ret->size = 0;
|
||
ret->dynindx = -1;
|
||
ret->dynstr_index = 0;
|
||
ret->weakdef = NULL;
|
||
ret->got.offset = (bfd_vma) -1;
|
||
ret->plt.offset = (bfd_vma) -1;
|
||
ret->linker_section_pointer = (elf_linker_section_pointers_t *)0;
|
||
ret->verinfo.verdef = NULL;
|
||
ret->vtable_entries_used = NULL;
|
||
ret->vtable_entries_size = 0;
|
||
ret->vtable_parent = NULL;
|
||
ret->type = STT_NOTYPE;
|
||
ret->other = 0;
|
||
/* Assume that we have been called by a non-ELF symbol reader.
|
||
This flag is then reset by the code which reads an ELF input
|
||
file. This ensures that a symbol created by a non-ELF symbol
|
||
reader will have the flag set correctly. */
|
||
ret->elf_link_hash_flags = ELF_LINK_NON_ELF;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Copy data from an indirect symbol to its direct symbol, hiding the
|
||
old indirect symbol. */
|
||
|
||
void
|
||
_bfd_elf_link_hash_copy_indirect (dir, ind)
|
||
struct elf_link_hash_entry *dir, *ind;
|
||
{
|
||
/* Copy down any references that we may have already seen to the
|
||
symbol which just became indirect. */
|
||
|
||
dir->elf_link_hash_flags |=
|
||
(ind->elf_link_hash_flags
|
||
& (ELF_LINK_HASH_REF_DYNAMIC
|
||
| ELF_LINK_HASH_REF_REGULAR
|
||
| ELF_LINK_HASH_REF_REGULAR_NONWEAK
|
||
| ELF_LINK_NON_GOT_REF));
|
||
|
||
/* Copy over the global and procedure linkage table offset entries.
|
||
These may have been already set up by a check_relocs routine. */
|
||
if (dir->got.offset == (bfd_vma) -1)
|
||
{
|
||
dir->got.offset = ind->got.offset;
|
||
ind->got.offset = (bfd_vma) -1;
|
||
}
|
||
BFD_ASSERT (ind->got.offset == (bfd_vma) -1);
|
||
|
||
if (dir->plt.offset == (bfd_vma) -1)
|
||
{
|
||
dir->plt.offset = ind->plt.offset;
|
||
ind->plt.offset = (bfd_vma) -1;
|
||
}
|
||
BFD_ASSERT (ind->plt.offset == (bfd_vma) -1);
|
||
|
||
if (dir->dynindx == -1)
|
||
{
|
||
dir->dynindx = ind->dynindx;
|
||
dir->dynstr_index = ind->dynstr_index;
|
||
ind->dynindx = -1;
|
||
ind->dynstr_index = 0;
|
||
}
|
||
BFD_ASSERT (ind->dynindx == -1);
|
||
}
|
||
|
||
void
|
||
_bfd_elf_link_hash_hide_symbol(h)
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
h->dynindx = -1;
|
||
h->plt.offset = (bfd_vma) -1;
|
||
}
|
||
|
||
/* Initialize an ELF linker hash table. */
|
||
|
||
boolean
|
||
_bfd_elf_link_hash_table_init (table, abfd, newfunc)
|
||
struct elf_link_hash_table *table;
|
||
bfd *abfd;
|
||
struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
|
||
struct bfd_hash_table *,
|
||
const char *));
|
||
{
|
||
table->dynamic_sections_created = false;
|
||
table->dynobj = NULL;
|
||
/* The first dynamic symbol is a dummy. */
|
||
table->dynsymcount = 1;
|
||
table->dynstr = NULL;
|
||
table->bucketcount = 0;
|
||
table->needed = NULL;
|
||
table->hgot = NULL;
|
||
table->stab_info = NULL;
|
||
table->dynlocal = NULL;
|
||
return _bfd_link_hash_table_init (&table->root, abfd, newfunc);
|
||
}
|
||
|
||
/* Create an ELF linker hash table. */
|
||
|
||
struct bfd_link_hash_table *
|
||
_bfd_elf_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_link_hash_table *ret;
|
||
|
||
ret = ((struct elf_link_hash_table *)
|
||
bfd_alloc (abfd, sizeof (struct elf_link_hash_table)));
|
||
if (ret == (struct elf_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc))
|
||
{
|
||
bfd_release (abfd, ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->root;
|
||
}
|
||
|
||
/* This is a hook for the ELF emulation code in the generic linker to
|
||
tell the backend linker what file name to use for the DT_NEEDED
|
||
entry for a dynamic object. The generic linker passes name as an
|
||
empty string to indicate that no DT_NEEDED entry should be made. */
|
||
|
||
void
|
||
bfd_elf_set_dt_needed_name (abfd, name)
|
||
bfd *abfd;
|
||
const char *name;
|
||
{
|
||
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
|
||
&& bfd_get_format (abfd) == bfd_object)
|
||
elf_dt_name (abfd) = name;
|
||
}
|
||
|
||
/* Get the list of DT_NEEDED entries for a link. This is a hook for
|
||
the linker ELF emulation code. */
|
||
|
||
struct bfd_link_needed_list *
|
||
bfd_elf_get_needed_list (abfd, info)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
if (info->hash->creator->flavour != bfd_target_elf_flavour)
|
||
return NULL;
|
||
return elf_hash_table (info)->needed;
|
||
}
|
||
|
||
/* Get the name actually used for a dynamic object for a link. This
|
||
is the SONAME entry if there is one. Otherwise, it is the string
|
||
passed to bfd_elf_set_dt_needed_name, or it is the filename. */
|
||
|
||
const char *
|
||
bfd_elf_get_dt_soname (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
|
||
&& bfd_get_format (abfd) == bfd_object)
|
||
return elf_dt_name (abfd);
|
||
return NULL;
|
||
}
|
||
|
||
/* Get the list of DT_NEEDED entries from a BFD. This is a hook for
|
||
the ELF linker emulation code. */
|
||
|
||
boolean
|
||
bfd_elf_get_bfd_needed_list (abfd, pneeded)
|
||
bfd *abfd;
|
||
struct bfd_link_needed_list **pneeded;
|
||
{
|
||
asection *s;
|
||
bfd_byte *dynbuf = NULL;
|
||
int elfsec;
|
||
unsigned long link;
|
||
bfd_byte *extdyn, *extdynend;
|
||
size_t extdynsize;
|
||
void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
|
||
|
||
*pneeded = NULL;
|
||
|
||
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour
|
||
|| bfd_get_format (abfd) != bfd_object)
|
||
return true;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".dynamic");
|
||
if (s == NULL || s->_raw_size == 0)
|
||
return true;
|
||
|
||
dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size);
|
||
if (dynbuf == NULL)
|
||
goto error_return;
|
||
|
||
if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0,
|
||
s->_raw_size))
|
||
goto error_return;
|
||
|
||
elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
|
||
if (elfsec == -1)
|
||
goto error_return;
|
||
|
||
link = elf_elfsections (abfd)[elfsec]->sh_link;
|
||
|
||
extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
|
||
swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
|
||
|
||
extdyn = dynbuf;
|
||
extdynend = extdyn + s->_raw_size;
|
||
for (; extdyn < extdynend; extdyn += extdynsize)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
|
||
(*swap_dyn_in) (abfd, (PTR) extdyn, &dyn);
|
||
|
||
if (dyn.d_tag == DT_NULL)
|
||
break;
|
||
|
||
if (dyn.d_tag == DT_NEEDED)
|
||
{
|
||
const char *string;
|
||
struct bfd_link_needed_list *l;
|
||
|
||
string = bfd_elf_string_from_elf_section (abfd, link,
|
||
dyn.d_un.d_val);
|
||
if (string == NULL)
|
||
goto error_return;
|
||
|
||
l = (struct bfd_link_needed_list *) bfd_alloc (abfd, sizeof *l);
|
||
if (l == NULL)
|
||
goto error_return;
|
||
|
||
l->by = abfd;
|
||
l->name = string;
|
||
l->next = *pneeded;
|
||
*pneeded = l;
|
||
}
|
||
}
|
||
|
||
free (dynbuf);
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (dynbuf != NULL)
|
||
free (dynbuf);
|
||
return false;
|
||
}
|
||
|
||
/* Allocate an ELF string table--force the first byte to be zero. */
|
||
|
||
struct bfd_strtab_hash *
|
||
_bfd_elf_stringtab_init ()
|
||
{
|
||
struct bfd_strtab_hash *ret;
|
||
|
||
ret = _bfd_stringtab_init ();
|
||
if (ret != NULL)
|
||
{
|
||
bfd_size_type loc;
|
||
|
||
loc = _bfd_stringtab_add (ret, "", true, false);
|
||
BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
|
||
if (loc == (bfd_size_type) -1)
|
||
{
|
||
_bfd_stringtab_free (ret);
|
||
ret = NULL;
|
||
}
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
/* ELF .o/exec file reading */
|
||
|
||
/* Create a new bfd section from an ELF section header. */
|
||
|
||
boolean
|
||
bfd_section_from_shdr (abfd, shindex)
|
||
bfd *abfd;
|
||
unsigned int shindex;
|
||
{
|
||
Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
|
||
Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
char *name;
|
||
|
||
name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
|
||
|
||
switch (hdr->sh_type)
|
||
{
|
||
case SHT_NULL:
|
||
/* Inactive section. Throw it away. */
|
||
return true;
|
||
|
||
case SHT_PROGBITS: /* Normal section with contents. */
|
||
case SHT_DYNAMIC: /* Dynamic linking information. */
|
||
case SHT_NOBITS: /* .bss section. */
|
||
case SHT_HASH: /* .hash section. */
|
||
case SHT_NOTE: /* .note section. */
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
|
||
case SHT_SYMTAB: /* A symbol table */
|
||
if (elf_onesymtab (abfd) == shindex)
|
||
return true;
|
||
|
||
BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
|
||
BFD_ASSERT (elf_onesymtab (abfd) == 0);
|
||
elf_onesymtab (abfd) = shindex;
|
||
elf_tdata (abfd)->symtab_hdr = *hdr;
|
||
elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
abfd->flags |= HAS_SYMS;
|
||
|
||
/* Sometimes a shared object will map in the symbol table. If
|
||
SHF_ALLOC is set, and this is a shared object, then we also
|
||
treat this section as a BFD section. We can not base the
|
||
decision purely on SHF_ALLOC, because that flag is sometimes
|
||
set in a relocateable object file, which would confuse the
|
||
linker. */
|
||
if ((hdr->sh_flags & SHF_ALLOC) != 0
|
||
&& (abfd->flags & DYNAMIC) != 0
|
||
&& ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
|
||
return true;
|
||
|
||
case SHT_DYNSYM: /* A dynamic symbol table */
|
||
if (elf_dynsymtab (abfd) == shindex)
|
||
return true;
|
||
|
||
BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
|
||
BFD_ASSERT (elf_dynsymtab (abfd) == 0);
|
||
elf_dynsymtab (abfd) = shindex;
|
||
elf_tdata (abfd)->dynsymtab_hdr = *hdr;
|
||
elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr;
|
||
abfd->flags |= HAS_SYMS;
|
||
|
||
/* Besides being a symbol table, we also treat this as a regular
|
||
section, so that objcopy can handle it. */
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
|
||
case SHT_STRTAB: /* A string table */
|
||
if (hdr->bfd_section != NULL)
|
||
return true;
|
||
if (ehdr->e_shstrndx == shindex)
|
||
{
|
||
elf_tdata (abfd)->shstrtab_hdr = *hdr;
|
||
elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
|
||
return true;
|
||
}
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 1; i < ehdr->e_shnum; i++)
|
||
{
|
||
Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
|
||
if (hdr2->sh_link == shindex)
|
||
{
|
||
if (! bfd_section_from_shdr (abfd, i))
|
||
return false;
|
||
if (elf_onesymtab (abfd) == i)
|
||
{
|
||
elf_tdata (abfd)->strtab_hdr = *hdr;
|
||
elf_elfsections (abfd)[shindex] =
|
||
&elf_tdata (abfd)->strtab_hdr;
|
||
return true;
|
||
}
|
||
if (elf_dynsymtab (abfd) == i)
|
||
{
|
||
elf_tdata (abfd)->dynstrtab_hdr = *hdr;
|
||
elf_elfsections (abfd)[shindex] = hdr =
|
||
&elf_tdata (abfd)->dynstrtab_hdr;
|
||
/* We also treat this as a regular section, so
|
||
that objcopy can handle it. */
|
||
break;
|
||
}
|
||
#if 0 /* Not handling other string tables specially right now. */
|
||
hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
|
||
/* We have a strtab for some random other section. */
|
||
newsect = (asection *) hdr2->bfd_section;
|
||
if (!newsect)
|
||
break;
|
||
hdr->bfd_section = newsect;
|
||
hdr2 = &elf_section_data (newsect)->str_hdr;
|
||
*hdr2 = *hdr;
|
||
elf_elfsections (abfd)[shindex] = hdr2;
|
||
#endif
|
||
}
|
||
}
|
||
}
|
||
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
|
||
case SHT_REL:
|
||
case SHT_RELA:
|
||
/* *These* do a lot of work -- but build no sections! */
|
||
{
|
||
asection *target_sect;
|
||
Elf_Internal_Shdr *hdr2;
|
||
|
||
/* Check for a bogus link to avoid crashing. */
|
||
if (hdr->sh_link >= ehdr->e_shnum)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: invalid link %lu for reloc section %s (index %u)"),
|
||
bfd_get_filename (abfd), hdr->sh_link, name, shindex));
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
}
|
||
|
||
/* For some incomprehensible reason Oracle distributes
|
||
libraries for Solaris in which some of the objects have
|
||
bogus sh_link fields. It would be nice if we could just
|
||
reject them, but, unfortunately, some people need to use
|
||
them. We scan through the section headers; if we find only
|
||
one suitable symbol table, we clobber the sh_link to point
|
||
to it. I hope this doesn't break anything. */
|
||
if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB
|
||
&& elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM)
|
||
{
|
||
int scan;
|
||
int found;
|
||
|
||
found = 0;
|
||
for (scan = 1; scan < ehdr->e_shnum; scan++)
|
||
{
|
||
if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB
|
||
|| elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM)
|
||
{
|
||
if (found != 0)
|
||
{
|
||
found = 0;
|
||
break;
|
||
}
|
||
found = scan;
|
||
}
|
||
}
|
||
if (found != 0)
|
||
hdr->sh_link = found;
|
||
}
|
||
|
||
/* Get the symbol table. */
|
||
if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB
|
||
&& ! bfd_section_from_shdr (abfd, hdr->sh_link))
|
||
return false;
|
||
|
||
/* If this reloc section does not use the main symbol table we
|
||
don't treat it as a reloc section. BFD can't adequately
|
||
represent such a section, so at least for now, we don't
|
||
try. We just present it as a normal section. */
|
||
if (hdr->sh_link != elf_onesymtab (abfd))
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
|
||
if (! bfd_section_from_shdr (abfd, hdr->sh_info))
|
||
return false;
|
||
target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
|
||
if (target_sect == NULL)
|
||
return false;
|
||
|
||
if ((target_sect->flags & SEC_RELOC) == 0
|
||
|| target_sect->reloc_count == 0)
|
||
hdr2 = &elf_section_data (target_sect)->rel_hdr;
|
||
else
|
||
{
|
||
BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
|
||
hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
|
||
elf_section_data (target_sect)->rel_hdr2 = hdr2;
|
||
}
|
||
*hdr2 = *hdr;
|
||
elf_elfsections (abfd)[shindex] = hdr2;
|
||
target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize;
|
||
target_sect->flags |= SEC_RELOC;
|
||
target_sect->relocation = NULL;
|
||
target_sect->rel_filepos = hdr->sh_offset;
|
||
/* In the section to which the relocations apply, mark whether
|
||
its relocations are of the REL or RELA variety. */
|
||
if (hdr->sh_size != 0)
|
||
elf_section_data (target_sect)->use_rela_p
|
||
= (hdr->sh_type == SHT_RELA);
|
||
abfd->flags |= HAS_RELOC;
|
||
return true;
|
||
}
|
||
break;
|
||
|
||
case SHT_GNU_verdef:
|
||
elf_dynverdef (abfd) = shindex;
|
||
elf_tdata (abfd)->dynverdef_hdr = *hdr;
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
break;
|
||
|
||
case SHT_GNU_versym:
|
||
elf_dynversym (abfd) = shindex;
|
||
elf_tdata (abfd)->dynversym_hdr = *hdr;
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
break;
|
||
|
||
case SHT_GNU_verneed:
|
||
elf_dynverref (abfd) = shindex;
|
||
elf_tdata (abfd)->dynverref_hdr = *hdr;
|
||
return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
|
||
break;
|
||
|
||
case SHT_SHLIB:
|
||
return true;
|
||
|
||
default:
|
||
/* Check for any processor-specific section types. */
|
||
{
|
||
if (bed->elf_backend_section_from_shdr)
|
||
(*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
|
||
}
|
||
break;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Given an ELF section number, retrieve the corresponding BFD
|
||
section. */
|
||
|
||
asection *
|
||
bfd_section_from_elf_index (abfd, index)
|
||
bfd *abfd;
|
||
unsigned int index;
|
||
{
|
||
BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
|
||
if (index >= elf_elfheader (abfd)->e_shnum)
|
||
return NULL;
|
||
return elf_elfsections (abfd)[index]->bfd_section;
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_new_section_hook (abfd, sec)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
{
|
||
struct bfd_elf_section_data *sdata;
|
||
|
||
sdata = (struct bfd_elf_section_data *) bfd_zalloc (abfd, sizeof (*sdata));
|
||
if (!sdata)
|
||
return false;
|
||
sec->used_by_bfd = (PTR) sdata;
|
||
|
||
/* Indicate whether or not this section should use RELA relocations. */
|
||
sdata->use_rela_p
|
||
= get_elf_backend_data (abfd)->default_use_rela_p;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create a new bfd section from an ELF program header.
|
||
|
||
Since program segments have no names, we generate a synthetic name
|
||
of the form segment<NUM>, where NUM is generally the index in the
|
||
program header table. For segments that are split (see below) we
|
||
generate the names segment<NUM>a and segment<NUM>b.
|
||
|
||
Note that some program segments may have a file size that is different than
|
||
(less than) the memory size. All this means is that at execution the
|
||
system must allocate the amount of memory specified by the memory size,
|
||
but only initialize it with the first "file size" bytes read from the
|
||
file. This would occur for example, with program segments consisting
|
||
of combined data+bss.
|
||
|
||
To handle the above situation, this routine generates TWO bfd sections
|
||
for the single program segment. The first has the length specified by
|
||
the file size of the segment, and the second has the length specified
|
||
by the difference between the two sizes. In effect, the segment is split
|
||
into it's initialized and uninitialized parts.
|
||
|
||
*/
|
||
|
||
boolean
|
||
_bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
|
||
bfd *abfd;
|
||
Elf_Internal_Phdr *hdr;
|
||
int index;
|
||
const char *typename;
|
||
{
|
||
asection *newsect;
|
||
char *name;
|
||
char namebuf[64];
|
||
int split;
|
||
|
||
split = ((hdr->p_memsz > 0)
|
||
&& (hdr->p_filesz > 0)
|
||
&& (hdr->p_memsz > hdr->p_filesz));
|
||
sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
|
||
name = bfd_alloc (abfd, strlen (namebuf) + 1);
|
||
if (!name)
|
||
return false;
|
||
strcpy (name, namebuf);
|
||
newsect = bfd_make_section (abfd, name);
|
||
if (newsect == NULL)
|
||
return false;
|
||
newsect->vma = hdr->p_vaddr;
|
||
newsect->lma = hdr->p_paddr;
|
||
newsect->_raw_size = hdr->p_filesz;
|
||
newsect->filepos = hdr->p_offset;
|
||
newsect->flags |= SEC_HAS_CONTENTS;
|
||
if (hdr->p_type == PT_LOAD)
|
||
{
|
||
newsect->flags |= SEC_ALLOC;
|
||
newsect->flags |= SEC_LOAD;
|
||
if (hdr->p_flags & PF_X)
|
||
{
|
||
/* FIXME: all we known is that it has execute PERMISSION,
|
||
may be data. */
|
||
newsect->flags |= SEC_CODE;
|
||
}
|
||
}
|
||
if (!(hdr->p_flags & PF_W))
|
||
{
|
||
newsect->flags |= SEC_READONLY;
|
||
}
|
||
|
||
if (split)
|
||
{
|
||
sprintf (namebuf, "%s%db", typename, index);
|
||
name = bfd_alloc (abfd, strlen (namebuf) + 1);
|
||
if (!name)
|
||
return false;
|
||
strcpy (name, namebuf);
|
||
newsect = bfd_make_section (abfd, name);
|
||
if (newsect == NULL)
|
||
return false;
|
||
newsect->vma = hdr->p_vaddr + hdr->p_filesz;
|
||
newsect->lma = hdr->p_paddr + hdr->p_filesz;
|
||
newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
|
||
if (hdr->p_type == PT_LOAD)
|
||
{
|
||
newsect->flags |= SEC_ALLOC;
|
||
if (hdr->p_flags & PF_X)
|
||
newsect->flags |= SEC_CODE;
|
||
}
|
||
if (!(hdr->p_flags & PF_W))
|
||
newsect->flags |= SEC_READONLY;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
boolean
|
||
bfd_section_from_phdr (abfd, hdr, index)
|
||
bfd *abfd;
|
||
Elf_Internal_Phdr *hdr;
|
||
int index;
|
||
{
|
||
struct elf_backend_data *bed;
|
||
|
||
switch (hdr->p_type)
|
||
{
|
||
case PT_NULL:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
|
||
|
||
case PT_LOAD:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
|
||
|
||
case PT_DYNAMIC:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
|
||
|
||
case PT_INTERP:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
|
||
|
||
case PT_NOTE:
|
||
if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
|
||
return false;
|
||
if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
|
||
return false;
|
||
return true;
|
||
|
||
case PT_SHLIB:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
|
||
|
||
case PT_PHDR:
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
|
||
|
||
default:
|
||
/* Check for any processor-specific program segment types.
|
||
If no handler for them, default to making "segment" sections. */
|
||
bed = get_elf_backend_data (abfd);
|
||
if (bed->elf_backend_section_from_phdr)
|
||
return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
|
||
else
|
||
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
|
||
}
|
||
}
|
||
|
||
/* Initialize REL_HDR, the section-header for new section, containing
|
||
relocations against ASECT. If USE_RELA_P is true, we use RELA
|
||
relocations; otherwise, we use REL relocations. */
|
||
|
||
boolean
|
||
_bfd_elf_init_reloc_shdr (abfd, rel_hdr, asect, use_rela_p)
|
||
bfd *abfd;
|
||
Elf_Internal_Shdr *rel_hdr;
|
||
asection *asect;
|
||
boolean use_rela_p;
|
||
{
|
||
char *name;
|
||
struct elf_backend_data *bed;
|
||
|
||
bed = get_elf_backend_data (abfd);
|
||
name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
|
||
if (name == NULL)
|
||
return false;
|
||
sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
|
||
rel_hdr->sh_name =
|
||
(unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
|
||
true, false);
|
||
if (rel_hdr->sh_name == (unsigned int) -1)
|
||
return false;
|
||
rel_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
|
||
rel_hdr->sh_entsize = (use_rela_p
|
||
? bed->s->sizeof_rela
|
||
: bed->s->sizeof_rel);
|
||
rel_hdr->sh_addralign = bed->s->file_align;
|
||
rel_hdr->sh_flags = 0;
|
||
rel_hdr->sh_addr = 0;
|
||
rel_hdr->sh_size = 0;
|
||
rel_hdr->sh_offset = 0;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set up an ELF internal section header for a section. */
|
||
|
||
/*ARGSUSED*/
|
||
static void
|
||
elf_fake_sections (abfd, asect, failedptrarg)
|
||
bfd *abfd;
|
||
asection *asect;
|
||
PTR failedptrarg;
|
||
{
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
boolean *failedptr = (boolean *) failedptrarg;
|
||
Elf_Internal_Shdr *this_hdr;
|
||
|
||
if (*failedptr)
|
||
{
|
||
/* We already failed; just get out of the bfd_map_over_sections
|
||
loop. */
|
||
return;
|
||
}
|
||
|
||
this_hdr = &elf_section_data (asect)->this_hdr;
|
||
|
||
this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
|
||
asect->name,
|
||
true, false);
|
||
if (this_hdr->sh_name == (unsigned long) -1)
|
||
{
|
||
*failedptr = true;
|
||
return;
|
||
}
|
||
|
||
this_hdr->sh_flags = 0;
|
||
|
||
if ((asect->flags & SEC_ALLOC) != 0
|
||
|| asect->user_set_vma)
|
||
this_hdr->sh_addr = asect->vma;
|
||
else
|
||
this_hdr->sh_addr = 0;
|
||
|
||
this_hdr->sh_offset = 0;
|
||
this_hdr->sh_size = asect->_raw_size;
|
||
this_hdr->sh_link = 0;
|
||
this_hdr->sh_addralign = 1 << asect->alignment_power;
|
||
/* The sh_entsize and sh_info fields may have been set already by
|
||
copy_private_section_data. */
|
||
|
||
this_hdr->bfd_section = asect;
|
||
this_hdr->contents = NULL;
|
||
|
||
/* FIXME: This should not be based on section names. */
|
||
if (strcmp (asect->name, ".dynstr") == 0)
|
||
this_hdr->sh_type = SHT_STRTAB;
|
||
else if (strcmp (asect->name, ".hash") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_HASH;
|
||
this_hdr->sh_entsize = bed->s->sizeof_hash_entry;
|
||
}
|
||
else if (strcmp (asect->name, ".dynsym") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_DYNSYM;
|
||
this_hdr->sh_entsize = bed->s->sizeof_sym;
|
||
}
|
||
else if (strcmp (asect->name, ".dynamic") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_DYNAMIC;
|
||
this_hdr->sh_entsize = bed->s->sizeof_dyn;
|
||
}
|
||
else if (strncmp (asect->name, ".rela", 5) == 0
|
||
&& get_elf_backend_data (abfd)->may_use_rela_p)
|
||
{
|
||
this_hdr->sh_type = SHT_RELA;
|
||
this_hdr->sh_entsize = bed->s->sizeof_rela;
|
||
}
|
||
else if (strncmp (asect->name, ".rel", 4) == 0
|
||
&& get_elf_backend_data (abfd)->may_use_rel_p)
|
||
{
|
||
this_hdr->sh_type = SHT_REL;
|
||
this_hdr->sh_entsize = bed->s->sizeof_rel;
|
||
}
|
||
else if (strncmp (asect->name, ".note", 5) == 0)
|
||
this_hdr->sh_type = SHT_NOTE;
|
||
else if (strncmp (asect->name, ".stab", 5) == 0
|
||
&& strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
|
||
this_hdr->sh_type = SHT_STRTAB;
|
||
else if (strcmp (asect->name, ".gnu.version") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_GNU_versym;
|
||
this_hdr->sh_entsize = sizeof (Elf_External_Versym);
|
||
}
|
||
else if (strcmp (asect->name, ".gnu.version_d") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_GNU_verdef;
|
||
this_hdr->sh_entsize = 0;
|
||
/* objcopy or strip will copy over sh_info, but may not set
|
||
cverdefs. The linker will set cverdefs, but sh_info will be
|
||
zero. */
|
||
if (this_hdr->sh_info == 0)
|
||
this_hdr->sh_info = elf_tdata (abfd)->cverdefs;
|
||
else
|
||
BFD_ASSERT (elf_tdata (abfd)->cverdefs == 0
|
||
|| this_hdr->sh_info == elf_tdata (abfd)->cverdefs);
|
||
}
|
||
else if (strcmp (asect->name, ".gnu.version_r") == 0)
|
||
{
|
||
this_hdr->sh_type = SHT_GNU_verneed;
|
||
this_hdr->sh_entsize = 0;
|
||
/* objcopy or strip will copy over sh_info, but may not set
|
||
cverrefs. The linker will set cverrefs, but sh_info will be
|
||
zero. */
|
||
if (this_hdr->sh_info == 0)
|
||
this_hdr->sh_info = elf_tdata (abfd)->cverrefs;
|
||
else
|
||
BFD_ASSERT (elf_tdata (abfd)->cverrefs == 0
|
||
|| this_hdr->sh_info == elf_tdata (abfd)->cverrefs);
|
||
}
|
||
else if ((asect->flags & SEC_ALLOC) != 0
|
||
&& (asect->flags & SEC_LOAD) != 0)
|
||
this_hdr->sh_type = SHT_PROGBITS;
|
||
else if ((asect->flags & SEC_ALLOC) != 0
|
||
&& ((asect->flags & SEC_LOAD) == 0))
|
||
this_hdr->sh_type = SHT_NOBITS;
|
||
else
|
||
{
|
||
/* Who knows? */
|
||
this_hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
|
||
if ((asect->flags & SEC_ALLOC) != 0)
|
||
this_hdr->sh_flags |= SHF_ALLOC;
|
||
if ((asect->flags & SEC_READONLY) == 0)
|
||
this_hdr->sh_flags |= SHF_WRITE;
|
||
if ((asect->flags & SEC_CODE) != 0)
|
||
this_hdr->sh_flags |= SHF_EXECINSTR;
|
||
|
||
/* Check for processor-specific section types. */
|
||
if (bed->elf_backend_fake_sections)
|
||
(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
|
||
|
||
/* If the section has relocs, set up a section header for the
|
||
SHT_REL[A] section. If two relocation sections are required for
|
||
this section, it is up to the processor-specific back-end to
|
||
create the other. */
|
||
if ((asect->flags & SEC_RELOC) != 0
|
||
&& !_bfd_elf_init_reloc_shdr (abfd,
|
||
&elf_section_data (asect)->rel_hdr,
|
||
asect,
|
||
elf_section_data (asect)->use_rela_p))
|
||
*failedptr = true;
|
||
}
|
||
|
||
/* Assign all ELF section numbers. The dummy first section is handled here
|
||
too. The link/info pointers for the standard section types are filled
|
||
in here too, while we're at it. */
|
||
|
||
static boolean
|
||
assign_section_numbers (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_obj_tdata *t = elf_tdata (abfd);
|
||
asection *sec;
|
||
unsigned int section_number;
|
||
Elf_Internal_Shdr **i_shdrp;
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
section_number = 1;
|
||
|
||
for (sec = abfd->sections; sec; sec = sec->next)
|
||
{
|
||
struct bfd_elf_section_data *d = elf_section_data (sec);
|
||
|
||
d->this_idx = section_number++;
|
||
if ((sec->flags & SEC_RELOC) == 0)
|
||
d->rel_idx = 0;
|
||
else
|
||
d->rel_idx = section_number++;
|
||
|
||
if (d->rel_hdr2)
|
||
d->rel_idx2 = section_number++;
|
||
else
|
||
d->rel_idx2 = 0;
|
||
}
|
||
|
||
t->shstrtab_section = section_number++;
|
||
elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
|
||
t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
|
||
|
||
if (bfd_get_symcount (abfd) > 0)
|
||
{
|
||
t->symtab_section = section_number++;
|
||
t->strtab_section = section_number++;
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_shnum = section_number;
|
||
|
||
/* Set up the list of section header pointers, in agreement with the
|
||
indices. */
|
||
i_shdrp = ((Elf_Internal_Shdr **)
|
||
bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
|
||
if (i_shdrp == NULL)
|
||
return false;
|
||
|
||
i_shdrp[0] = ((Elf_Internal_Shdr *)
|
||
bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
|
||
if (i_shdrp[0] == NULL)
|
||
{
|
||
bfd_release (abfd, i_shdrp);
|
||
return false;
|
||
}
|
||
memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
|
||
|
||
elf_elfsections (abfd) = i_shdrp;
|
||
|
||
i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
|
||
if (bfd_get_symcount (abfd) > 0)
|
||
{
|
||
i_shdrp[t->symtab_section] = &t->symtab_hdr;
|
||
i_shdrp[t->strtab_section] = &t->strtab_hdr;
|
||
t->symtab_hdr.sh_link = t->strtab_section;
|
||
}
|
||
for (sec = abfd->sections; sec; sec = sec->next)
|
||
{
|
||
struct bfd_elf_section_data *d = elf_section_data (sec);
|
||
asection *s;
|
||
const char *name;
|
||
|
||
i_shdrp[d->this_idx] = &d->this_hdr;
|
||
if (d->rel_idx != 0)
|
||
i_shdrp[d->rel_idx] = &d->rel_hdr;
|
||
if (d->rel_idx2 != 0)
|
||
i_shdrp[d->rel_idx2] = d->rel_hdr2;
|
||
|
||
/* Fill in the sh_link and sh_info fields while we're at it. */
|
||
|
||
/* sh_link of a reloc section is the section index of the symbol
|
||
table. sh_info is the section index of the section to which
|
||
the relocation entries apply. */
|
||
if (d->rel_idx != 0)
|
||
{
|
||
d->rel_hdr.sh_link = t->symtab_section;
|
||
d->rel_hdr.sh_info = d->this_idx;
|
||
}
|
||
if (d->rel_idx2 != 0)
|
||
{
|
||
d->rel_hdr2->sh_link = t->symtab_section;
|
||
d->rel_hdr2->sh_info = d->this_idx;
|
||
}
|
||
|
||
switch (d->this_hdr.sh_type)
|
||
{
|
||
case SHT_REL:
|
||
case SHT_RELA:
|
||
/* A reloc section which we are treating as a normal BFD
|
||
section. sh_link is the section index of the symbol
|
||
table. sh_info is the section index of the section to
|
||
which the relocation entries apply. We assume that an
|
||
allocated reloc section uses the dynamic symbol table.
|
||
FIXME: How can we be sure? */
|
||
s = bfd_get_section_by_name (abfd, ".dynsym");
|
||
if (s != NULL)
|
||
d->this_hdr.sh_link = elf_section_data (s)->this_idx;
|
||
|
||
/* We look up the section the relocs apply to by name. */
|
||
name = sec->name;
|
||
if (d->this_hdr.sh_type == SHT_REL)
|
||
name += 4;
|
||
else
|
||
name += 5;
|
||
s = bfd_get_section_by_name (abfd, name);
|
||
if (s != NULL)
|
||
d->this_hdr.sh_info = elf_section_data (s)->this_idx;
|
||
break;
|
||
|
||
case SHT_STRTAB:
|
||
/* We assume that a section named .stab*str is a stabs
|
||
string section. We look for a section with the same name
|
||
but without the trailing ``str'', and set its sh_link
|
||
field to point to this section. */
|
||
if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
|
||
&& strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
|
||
{
|
||
size_t len;
|
||
char *alc;
|
||
|
||
len = strlen (sec->name);
|
||
alc = (char *) bfd_malloc (len - 2);
|
||
if (alc == NULL)
|
||
return false;
|
||
strncpy (alc, sec->name, len - 3);
|
||
alc[len - 3] = '\0';
|
||
s = bfd_get_section_by_name (abfd, alc);
|
||
free (alc);
|
||
if (s != NULL)
|
||
{
|
||
elf_section_data (s)->this_hdr.sh_link = d->this_idx;
|
||
|
||
/* This is a .stab section. */
|
||
elf_section_data (s)->this_hdr.sh_entsize =
|
||
4 + 2 * (bed->s->arch_size / 8);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case SHT_DYNAMIC:
|
||
case SHT_DYNSYM:
|
||
case SHT_GNU_verneed:
|
||
case SHT_GNU_verdef:
|
||
/* sh_link is the section header index of the string table
|
||
used for the dynamic entries, or the symbol table, or the
|
||
version strings. */
|
||
s = bfd_get_section_by_name (abfd, ".dynstr");
|
||
if (s != NULL)
|
||
d->this_hdr.sh_link = elf_section_data (s)->this_idx;
|
||
break;
|
||
|
||
case SHT_HASH:
|
||
case SHT_GNU_versym:
|
||
/* sh_link is the section header index of the symbol table
|
||
this hash table or version table is for. */
|
||
s = bfd_get_section_by_name (abfd, ".dynsym");
|
||
if (s != NULL)
|
||
d->this_hdr.sh_link = elf_section_data (s)->this_idx;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Map symbol from it's internal number to the external number, moving
|
||
all local symbols to be at the head of the list. */
|
||
|
||
static INLINE int
|
||
sym_is_global (abfd, sym)
|
||
bfd *abfd;
|
||
asymbol *sym;
|
||
{
|
||
/* If the backend has a special mapping, use it. */
|
||
if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
|
||
return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
|
||
(abfd, sym));
|
||
|
||
return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
|
||
|| bfd_is_und_section (bfd_get_section (sym))
|
||
|| bfd_is_com_section (bfd_get_section (sym)));
|
||
}
|
||
|
||
static boolean
|
||
elf_map_symbols (abfd)
|
||
bfd *abfd;
|
||
{
|
||
int symcount = bfd_get_symcount (abfd);
|
||
asymbol **syms = bfd_get_outsymbols (abfd);
|
||
asymbol **sect_syms;
|
||
int num_locals = 0;
|
||
int num_globals = 0;
|
||
int num_locals2 = 0;
|
||
int num_globals2 = 0;
|
||
int max_index = 0;
|
||
int num_sections = 0;
|
||
int idx;
|
||
asection *asect;
|
||
asymbol **new_syms;
|
||
asymbol *sym;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "elf_map_symbols\n");
|
||
fflush (stderr);
|
||
#endif
|
||
|
||
/* Add a section symbol for each BFD section. FIXME: Is this really
|
||
necessary? */
|
||
for (asect = abfd->sections; asect; asect = asect->next)
|
||
{
|
||
if (max_index < asect->index)
|
||
max_index = asect->index;
|
||
}
|
||
|
||
max_index++;
|
||
sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
|
||
if (sect_syms == NULL)
|
||
return false;
|
||
elf_section_syms (abfd) = sect_syms;
|
||
|
||
for (idx = 0; idx < symcount; idx++)
|
||
{
|
||
sym = syms[idx];
|
||
|
||
if ((sym->flags & BSF_SECTION_SYM) != 0
|
||
&& sym->value == 0)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = sym->section;
|
||
|
||
if (sec->owner != NULL)
|
||
{
|
||
if (sec->owner != abfd)
|
||
{
|
||
if (sec->output_offset != 0)
|
||
continue;
|
||
|
||
sec = sec->output_section;
|
||
|
||
/* Empty sections in the input files may have had a section
|
||
symbol created for them. (See the comment near the end of
|
||
_bfd_generic_link_output_symbols in linker.c). If the linker
|
||
script discards such sections then we will reach this point.
|
||
Since we know that we cannot avoid this case, we detect it
|
||
and skip the abort and the assignment to the sect_syms array.
|
||
To reproduce this particular case try running the linker
|
||
testsuite test ld-scripts/weak.exp for an ELF port that uses
|
||
the generic linker. */
|
||
if (sec->owner == NULL)
|
||
continue;
|
||
|
||
BFD_ASSERT (sec->owner == abfd);
|
||
}
|
||
sect_syms[sec->index] = syms[idx];
|
||
}
|
||
}
|
||
}
|
||
|
||
for (asect = abfd->sections; asect; asect = asect->next)
|
||
{
|
||
if (sect_syms[asect->index] != NULL)
|
||
continue;
|
||
|
||
sym = bfd_make_empty_symbol (abfd);
|
||
if (sym == NULL)
|
||
return false;
|
||
sym->the_bfd = abfd;
|
||
sym->name = asect->name;
|
||
sym->value = 0;
|
||
/* Set the flags to 0 to indicate that this one was newly added. */
|
||
sym->flags = 0;
|
||
sym->section = asect;
|
||
sect_syms[asect->index] = sym;
|
||
num_sections++;
|
||
#ifdef DEBUG
|
||
fprintf (stderr,
|
||
_("creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n"),
|
||
asect->name, (long) asect->vma, asect->index, (long) asect);
|
||
#endif
|
||
}
|
||
|
||
/* Classify all of the symbols. */
|
||
for (idx = 0; idx < symcount; idx++)
|
||
{
|
||
if (!sym_is_global (abfd, syms[idx]))
|
||
num_locals++;
|
||
else
|
||
num_globals++;
|
||
}
|
||
for (asect = abfd->sections; asect; asect = asect->next)
|
||
{
|
||
if (sect_syms[asect->index] != NULL
|
||
&& sect_syms[asect->index]->flags == 0)
|
||
{
|
||
sect_syms[asect->index]->flags = BSF_SECTION_SYM;
|
||
if (!sym_is_global (abfd, sect_syms[asect->index]))
|
||
num_locals++;
|
||
else
|
||
num_globals++;
|
||
sect_syms[asect->index]->flags = 0;
|
||
}
|
||
}
|
||
|
||
/* Now sort the symbols so the local symbols are first. */
|
||
new_syms = ((asymbol **)
|
||
bfd_alloc (abfd,
|
||
(num_locals + num_globals) * sizeof (asymbol *)));
|
||
if (new_syms == NULL)
|
||
return false;
|
||
|
||
for (idx = 0; idx < symcount; idx++)
|
||
{
|
||
asymbol *sym = syms[idx];
|
||
int i;
|
||
|
||
if (!sym_is_global (abfd, sym))
|
||
i = num_locals2++;
|
||
else
|
||
i = num_locals + num_globals2++;
|
||
new_syms[i] = sym;
|
||
sym->udata.i = i + 1;
|
||
}
|
||
for (asect = abfd->sections; asect; asect = asect->next)
|
||
{
|
||
if (sect_syms[asect->index] != NULL
|
||
&& sect_syms[asect->index]->flags == 0)
|
||
{
|
||
asymbol *sym = sect_syms[asect->index];
|
||
int i;
|
||
|
||
sym->flags = BSF_SECTION_SYM;
|
||
if (!sym_is_global (abfd, sym))
|
||
i = num_locals2++;
|
||
else
|
||
i = num_locals + num_globals2++;
|
||
new_syms[i] = sym;
|
||
sym->udata.i = i + 1;
|
||
}
|
||
}
|
||
|
||
bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
|
||
|
||
elf_num_locals (abfd) = num_locals;
|
||
elf_num_globals (abfd) = num_globals;
|
||
return true;
|
||
}
|
||
|
||
/* Align to the maximum file alignment that could be required for any
|
||
ELF data structure. */
|
||
|
||
static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
|
||
static INLINE file_ptr
|
||
align_file_position (off, align)
|
||
file_ptr off;
|
||
int align;
|
||
{
|
||
return (off + align - 1) & ~(align - 1);
|
||
}
|
||
|
||
/* Assign a file position to a section, optionally aligning to the
|
||
required section alignment. */
|
||
|
||
INLINE file_ptr
|
||
_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
|
||
Elf_Internal_Shdr *i_shdrp;
|
||
file_ptr offset;
|
||
boolean align;
|
||
{
|
||
if (align)
|
||
{
|
||
unsigned int al;
|
||
|
||
al = i_shdrp->sh_addralign;
|
||
if (al > 1)
|
||
offset = BFD_ALIGN (offset, al);
|
||
}
|
||
i_shdrp->sh_offset = offset;
|
||
if (i_shdrp->bfd_section != NULL)
|
||
i_shdrp->bfd_section->filepos = offset;
|
||
if (i_shdrp->sh_type != SHT_NOBITS)
|
||
offset += i_shdrp->sh_size;
|
||
return offset;
|
||
}
|
||
|
||
/* Compute the file positions we are going to put the sections at, and
|
||
otherwise prepare to begin writing out the ELF file. If LINK_INFO
|
||
is not NULL, this is being called by the ELF backend linker. */
|
||
|
||
boolean
|
||
_bfd_elf_compute_section_file_positions (abfd, link_info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *link_info;
|
||
{
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
boolean failed;
|
||
struct bfd_strtab_hash *strtab;
|
||
Elf_Internal_Shdr *shstrtab_hdr;
|
||
|
||
if (abfd->output_has_begun)
|
||
return true;
|
||
|
||
/* Do any elf backend specific processing first. */
|
||
if (bed->elf_backend_begin_write_processing)
|
||
(*bed->elf_backend_begin_write_processing) (abfd, link_info);
|
||
|
||
if (! prep_headers (abfd))
|
||
return false;
|
||
|
||
/* Post process the headers if necessary. */
|
||
if (bed->elf_backend_post_process_headers)
|
||
(*bed->elf_backend_post_process_headers) (abfd, link_info);
|
||
|
||
failed = false;
|
||
bfd_map_over_sections (abfd, elf_fake_sections, &failed);
|
||
if (failed)
|
||
return false;
|
||
|
||
if (!assign_section_numbers (abfd))
|
||
return false;
|
||
|
||
/* The backend linker builds symbol table information itself. */
|
||
if (link_info == NULL && bfd_get_symcount (abfd) > 0)
|
||
{
|
||
/* Non-zero if doing a relocatable link. */
|
||
int relocatable_p = ! (abfd->flags & (EXEC_P | DYNAMIC));
|
||
|
||
if (! swap_out_syms (abfd, &strtab, relocatable_p))
|
||
return false;
|
||
}
|
||
|
||
shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
|
||
/* sh_name was set in prep_headers. */
|
||
shstrtab_hdr->sh_type = SHT_STRTAB;
|
||
shstrtab_hdr->sh_flags = 0;
|
||
shstrtab_hdr->sh_addr = 0;
|
||
shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
|
||
shstrtab_hdr->sh_entsize = 0;
|
||
shstrtab_hdr->sh_link = 0;
|
||
shstrtab_hdr->sh_info = 0;
|
||
/* sh_offset is set in assign_file_positions_except_relocs. */
|
||
shstrtab_hdr->sh_addralign = 1;
|
||
|
||
if (!assign_file_positions_except_relocs (abfd))
|
||
return false;
|
||
|
||
if (link_info == NULL && bfd_get_symcount (abfd) > 0)
|
||
{
|
||
file_ptr off;
|
||
Elf_Internal_Shdr *hdr;
|
||
|
||
off = elf_tdata (abfd)->next_file_pos;
|
||
|
||
hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
|
||
|
||
hdr = &elf_tdata (abfd)->strtab_hdr;
|
||
off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
|
||
|
||
elf_tdata (abfd)->next_file_pos = off;
|
||
|
||
/* Now that we know where the .strtab section goes, write it
|
||
out. */
|
||
if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
|
||
|| ! _bfd_stringtab_emit (abfd, strtab))
|
||
return false;
|
||
_bfd_stringtab_free (strtab);
|
||
}
|
||
|
||
abfd->output_has_begun = true;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create a mapping from a set of sections to a program segment. */
|
||
|
||
static INLINE struct elf_segment_map *
|
||
make_mapping (abfd, sections, from, to, phdr)
|
||
bfd *abfd;
|
||
asection **sections;
|
||
unsigned int from;
|
||
unsigned int to;
|
||
boolean phdr;
|
||
{
|
||
struct elf_segment_map *m;
|
||
unsigned int i;
|
||
asection **hdrpp;
|
||
|
||
m = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd,
|
||
(sizeof (struct elf_segment_map)
|
||
+ (to - from - 1) * sizeof (asection *))));
|
||
if (m == NULL)
|
||
return NULL;
|
||
m->next = NULL;
|
||
m->p_type = PT_LOAD;
|
||
for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++)
|
||
m->sections[i - from] = *hdrpp;
|
||
m->count = to - from;
|
||
|
||
if (from == 0 && phdr)
|
||
{
|
||
/* Include the headers in the first PT_LOAD segment. */
|
||
m->includes_filehdr = 1;
|
||
m->includes_phdrs = 1;
|
||
}
|
||
|
||
return m;
|
||
}
|
||
|
||
/* Set up a mapping from BFD sections to program segments. */
|
||
|
||
static boolean
|
||
map_sections_to_segments (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection **sections = NULL;
|
||
asection *s;
|
||
unsigned int i;
|
||
unsigned int count;
|
||
struct elf_segment_map *mfirst;
|
||
struct elf_segment_map **pm;
|
||
struct elf_segment_map *m;
|
||
asection *last_hdr;
|
||
unsigned int phdr_index;
|
||
bfd_vma maxpagesize;
|
||
asection **hdrpp;
|
||
boolean phdr_in_segment = true;
|
||
boolean writable;
|
||
asection *dynsec;
|
||
|
||
if (elf_tdata (abfd)->segment_map != NULL)
|
||
return true;
|
||
|
||
if (bfd_count_sections (abfd) == 0)
|
||
return true;
|
||
|
||
/* Select the allocated sections, and sort them. */
|
||
|
||
sections = (asection **) bfd_malloc (bfd_count_sections (abfd)
|
||
* sizeof (asection *));
|
||
if (sections == NULL)
|
||
goto error_return;
|
||
|
||
i = 0;
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_ALLOC) != 0)
|
||
{
|
||
sections[i] = s;
|
||
++i;
|
||
}
|
||
}
|
||
BFD_ASSERT (i <= bfd_count_sections (abfd));
|
||
count = i;
|
||
|
||
qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections);
|
||
|
||
/* Build the mapping. */
|
||
|
||
mfirst = NULL;
|
||
pm = &mfirst;
|
||
|
||
/* If we have a .interp section, then create a PT_PHDR segment for
|
||
the program headers and a PT_INTERP segment for the .interp
|
||
section. */
|
||
s = bfd_get_section_by_name (abfd, ".interp");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0)
|
||
{
|
||
m = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
|
||
if (m == NULL)
|
||
goto error_return;
|
||
m->next = NULL;
|
||
m->p_type = PT_PHDR;
|
||
/* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
|
||
m->p_flags = PF_R | PF_X;
|
||
m->p_flags_valid = 1;
|
||
m->includes_phdrs = 1;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
|
||
m = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
|
||
if (m == NULL)
|
||
goto error_return;
|
||
m->next = NULL;
|
||
m->p_type = PT_INTERP;
|
||
m->count = 1;
|
||
m->sections[0] = s;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
}
|
||
|
||
/* Look through the sections. We put sections in the same program
|
||
segment when the start of the second section can be placed within
|
||
a few bytes of the end of the first section. */
|
||
last_hdr = NULL;
|
||
phdr_index = 0;
|
||
maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
|
||
writable = false;
|
||
dynsec = bfd_get_section_by_name (abfd, ".dynamic");
|
||
if (dynsec != NULL
|
||
&& (dynsec->flags & SEC_LOAD) == 0)
|
||
dynsec = NULL;
|
||
|
||
/* Deal with -Ttext or something similar such that the first section
|
||
is not adjacent to the program headers. This is an
|
||
approximation, since at this point we don't know exactly how many
|
||
program headers we will need. */
|
||
if (count > 0)
|
||
{
|
||
bfd_size_type phdr_size;
|
||
|
||
phdr_size = elf_tdata (abfd)->program_header_size;
|
||
if (phdr_size == 0)
|
||
phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
|
||
if ((abfd->flags & D_PAGED) == 0
|
||
|| sections[0]->lma < phdr_size
|
||
|| sections[0]->lma % maxpagesize < phdr_size % maxpagesize)
|
||
phdr_in_segment = false;
|
||
}
|
||
|
||
for (i = 0, hdrpp = sections; i < count; i++, hdrpp++)
|
||
{
|
||
asection *hdr;
|
||
boolean new_segment;
|
||
|
||
hdr = *hdrpp;
|
||
|
||
/* See if this section and the last one will fit in the same
|
||
segment. */
|
||
|
||
if (last_hdr == NULL)
|
||
{
|
||
/* If we don't have a segment yet, then we don't need a new
|
||
one (we build the last one after this loop). */
|
||
new_segment = false;
|
||
}
|
||
else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma)
|
||
{
|
||
/* If this section has a different relation between the
|
||
virtual address and the load address, then we need a new
|
||
segment. */
|
||
new_segment = true;
|
||
}
|
||
else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
|
||
< BFD_ALIGN (hdr->lma, maxpagesize))
|
||
{
|
||
/* If putting this section in this segment would force us to
|
||
skip a page in the segment, then we need a new segment. */
|
||
new_segment = true;
|
||
}
|
||
else if ((last_hdr->flags & SEC_LOAD) == 0
|
||
&& (hdr->flags & SEC_LOAD) != 0)
|
||
{
|
||
/* We don't want to put a loadable section after a
|
||
nonloadable section in the same segment. */
|
||
new_segment = true;
|
||
}
|
||
else if ((abfd->flags & D_PAGED) == 0)
|
||
{
|
||
/* If the file is not demand paged, which means that we
|
||
don't require the sections to be correctly aligned in the
|
||
file, then there is no other reason for a new segment. */
|
||
new_segment = false;
|
||
}
|
||
else if (! writable
|
||
&& (hdr->flags & SEC_READONLY) == 0
|
||
&& (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
|
||
== hdr->lma))
|
||
{
|
||
/* We don't want to put a writable section in a read only
|
||
segment, unless they are on the same page in memory
|
||
anyhow. We already know that the last section does not
|
||
bring us past the current section on the page, so the
|
||
only case in which the new section is not on the same
|
||
page as the previous section is when the previous section
|
||
ends precisely on a page boundary. */
|
||
new_segment = true;
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, we can use the same segment. */
|
||
new_segment = false;
|
||
}
|
||
|
||
if (! new_segment)
|
||
{
|
||
if ((hdr->flags & SEC_READONLY) == 0)
|
||
writable = true;
|
||
last_hdr = hdr;
|
||
continue;
|
||
}
|
||
|
||
/* We need a new program segment. We must create a new program
|
||
header holding all the sections from phdr_index until hdr. */
|
||
|
||
m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
|
||
if (m == NULL)
|
||
goto error_return;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
|
||
if ((hdr->flags & SEC_READONLY) == 0)
|
||
writable = true;
|
||
else
|
||
writable = false;
|
||
|
||
last_hdr = hdr;
|
||
phdr_index = i;
|
||
phdr_in_segment = false;
|
||
}
|
||
|
||
/* Create a final PT_LOAD program segment. */
|
||
if (last_hdr != NULL)
|
||
{
|
||
m = make_mapping (abfd, sections, phdr_index, i, phdr_in_segment);
|
||
if (m == NULL)
|
||
goto error_return;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
}
|
||
|
||
/* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
|
||
if (dynsec != NULL)
|
||
{
|
||
m = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
|
||
if (m == NULL)
|
||
goto error_return;
|
||
m->next = NULL;
|
||
m->p_type = PT_DYNAMIC;
|
||
m->count = 1;
|
||
m->sections[0] = dynsec;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
}
|
||
|
||
/* For each loadable .note section, add a PT_NOTE segment. We don't
|
||
use bfd_get_section_by_name, because if we link together
|
||
nonloadable .note sections and loadable .note sections, we will
|
||
generate two .note sections in the output file. FIXME: Using
|
||
names for section types is bogus anyhow. */
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LOAD) != 0
|
||
&& strncmp (s->name, ".note", 5) == 0)
|
||
{
|
||
m = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof (struct elf_segment_map)));
|
||
if (m == NULL)
|
||
goto error_return;
|
||
m->next = NULL;
|
||
m->p_type = PT_NOTE;
|
||
m->count = 1;
|
||
m->sections[0] = s;
|
||
|
||
*pm = m;
|
||
pm = &m->next;
|
||
}
|
||
}
|
||
|
||
free (sections);
|
||
sections = NULL;
|
||
|
||
elf_tdata (abfd)->segment_map = mfirst;
|
||
return true;
|
||
|
||
error_return:
|
||
if (sections != NULL)
|
||
free (sections);
|
||
return false;
|
||
}
|
||
|
||
/* Sort sections by address. */
|
||
|
||
static int
|
||
elf_sort_sections (arg1, arg2)
|
||
const PTR arg1;
|
||
const PTR arg2;
|
||
{
|
||
const asection *sec1 = *(const asection **) arg1;
|
||
const asection *sec2 = *(const asection **) arg2;
|
||
|
||
/* Sort by LMA first, since this is the address used to
|
||
place the section into a segment. */
|
||
if (sec1->lma < sec2->lma)
|
||
return -1;
|
||
else if (sec1->lma > sec2->lma)
|
||
return 1;
|
||
|
||
/* Then sort by VMA. Normally the LMA and the VMA will be
|
||
the same, and this will do nothing. */
|
||
if (sec1->vma < sec2->vma)
|
||
return -1;
|
||
else if (sec1->vma > sec2->vma)
|
||
return 1;
|
||
|
||
/* Put !SEC_LOAD sections after SEC_LOAD ones. */
|
||
|
||
#define TOEND(x) (((x)->flags & SEC_LOAD) == 0)
|
||
|
||
if (TOEND (sec1))
|
||
{
|
||
if (TOEND (sec2))
|
||
return sec1->target_index - sec2->target_index;
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
if (TOEND (sec2))
|
||
return -1;
|
||
|
||
#undef TOEND
|
||
|
||
/* Sort by size, to put zero sized sections before others at the
|
||
same address. */
|
||
|
||
if (sec1->_raw_size < sec2->_raw_size)
|
||
return -1;
|
||
if (sec1->_raw_size > sec2->_raw_size)
|
||
return 1;
|
||
|
||
return sec1->target_index - sec2->target_index;
|
||
}
|
||
|
||
/* Assign file positions to the sections based on the mapping from
|
||
sections to segments. This function also sets up some fields in
|
||
the file header, and writes out the program headers. */
|
||
|
||
static boolean
|
||
assign_file_positions_for_segments (abfd)
|
||
bfd *abfd;
|
||
{
|
||
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
unsigned int count;
|
||
struct elf_segment_map *m;
|
||
unsigned int alloc;
|
||
Elf_Internal_Phdr *phdrs;
|
||
file_ptr off, voff;
|
||
bfd_vma filehdr_vaddr, filehdr_paddr;
|
||
bfd_vma phdrs_vaddr, phdrs_paddr;
|
||
Elf_Internal_Phdr *p;
|
||
|
||
if (elf_tdata (abfd)->segment_map == NULL)
|
||
{
|
||
if (! map_sections_to_segments (abfd))
|
||
return false;
|
||
}
|
||
|
||
if (bed->elf_backend_modify_segment_map)
|
||
{
|
||
if (! (*bed->elf_backend_modify_segment_map) (abfd))
|
||
return false;
|
||
}
|
||
|
||
count = 0;
|
||
for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
|
||
++count;
|
||
|
||
elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr;
|
||
elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr;
|
||
elf_elfheader (abfd)->e_phnum = count;
|
||
|
||
if (count == 0)
|
||
return true;
|
||
|
||
/* If we already counted the number of program segments, make sure
|
||
that we allocated enough space. This happens when SIZEOF_HEADERS
|
||
is used in a linker script. */
|
||
alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr;
|
||
if (alloc != 0 && count > alloc)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: Not enough room for program headers (allocated %u, need %u)"),
|
||
bfd_get_filename (abfd), alloc, count));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
if (alloc == 0)
|
||
alloc = count;
|
||
|
||
phdrs = ((Elf_Internal_Phdr *)
|
||
bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr)));
|
||
if (phdrs == NULL)
|
||
return false;
|
||
|
||
off = bed->s->sizeof_ehdr;
|
||
off += alloc * bed->s->sizeof_phdr;
|
||
|
||
filehdr_vaddr = 0;
|
||
filehdr_paddr = 0;
|
||
phdrs_vaddr = 0;
|
||
phdrs_paddr = 0;
|
||
|
||
for (m = elf_tdata (abfd)->segment_map, p = phdrs;
|
||
m != NULL;
|
||
m = m->next, p++)
|
||
{
|
||
unsigned int i;
|
||
asection **secpp;
|
||
|
||
/* If elf_segment_map is not from map_sections_to_segments, the
|
||
sections may not be correctly ordered. */
|
||
if (m->count > 0)
|
||
qsort (m->sections, (size_t) m->count, sizeof (asection *),
|
||
elf_sort_sections);
|
||
|
||
p->p_type = m->p_type;
|
||
p->p_flags = m->p_flags;
|
||
|
||
if (p->p_type == PT_LOAD
|
||
&& m->count > 0
|
||
&& (m->sections[0]->flags & SEC_ALLOC) != 0)
|
||
{
|
||
if ((abfd->flags & D_PAGED) != 0)
|
||
off += (m->sections[0]->vma - off) % bed->maxpagesize;
|
||
else
|
||
{
|
||
bfd_size_type align;
|
||
|
||
align = 0;
|
||
for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
|
||
{
|
||
bfd_size_type secalign;
|
||
|
||
secalign = bfd_get_section_alignment (abfd, *secpp);
|
||
if (secalign > align)
|
||
align = secalign;
|
||
}
|
||
|
||
off += (m->sections[0]->vma - off) % (1 << align);
|
||
}
|
||
}
|
||
|
||
if (m->count == 0)
|
||
p->p_vaddr = 0;
|
||
else
|
||
p->p_vaddr = m->sections[0]->vma;
|
||
|
||
if (m->p_paddr_valid)
|
||
p->p_paddr = m->p_paddr;
|
||
else if (m->count == 0)
|
||
p->p_paddr = 0;
|
||
else
|
||
p->p_paddr = m->sections[0]->lma;
|
||
|
||
if (p->p_type == PT_LOAD
|
||
&& (abfd->flags & D_PAGED) != 0)
|
||
p->p_align = bed->maxpagesize;
|
||
else if (m->count == 0)
|
||
p->p_align = bed->s->file_align;
|
||
else
|
||
p->p_align = 0;
|
||
|
||
p->p_offset = 0;
|
||
p->p_filesz = 0;
|
||
p->p_memsz = 0;
|
||
|
||
if (m->includes_filehdr)
|
||
{
|
||
if (! m->p_flags_valid)
|
||
p->p_flags |= PF_R;
|
||
p->p_offset = 0;
|
||
p->p_filesz = bed->s->sizeof_ehdr;
|
||
p->p_memsz = bed->s->sizeof_ehdr;
|
||
if (m->count > 0)
|
||
{
|
||
BFD_ASSERT (p->p_type == PT_LOAD);
|
||
|
||
if (p->p_vaddr < (bfd_vma) off)
|
||
{
|
||
_bfd_error_handler (_("%s: Not enough room for program headers, try linking with -N"),
|
||
bfd_get_filename (abfd));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
p->p_vaddr -= off;
|
||
if (! m->p_paddr_valid)
|
||
p->p_paddr -= off;
|
||
}
|
||
if (p->p_type == PT_LOAD)
|
||
{
|
||
filehdr_vaddr = p->p_vaddr;
|
||
filehdr_paddr = p->p_paddr;
|
||
}
|
||
}
|
||
|
||
if (m->includes_phdrs)
|
||
{
|
||
if (! m->p_flags_valid)
|
||
p->p_flags |= PF_R;
|
||
|
||
if (m->includes_filehdr)
|
||
{
|
||
if (p->p_type == PT_LOAD)
|
||
{
|
||
phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr;
|
||
phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
p->p_offset = bed->s->sizeof_ehdr;
|
||
|
||
if (m->count > 0)
|
||
{
|
||
BFD_ASSERT (p->p_type == PT_LOAD);
|
||
p->p_vaddr -= off - p->p_offset;
|
||
if (! m->p_paddr_valid)
|
||
p->p_paddr -= off - p->p_offset;
|
||
}
|
||
|
||
if (p->p_type == PT_LOAD)
|
||
{
|
||
phdrs_vaddr = p->p_vaddr;
|
||
phdrs_paddr = p->p_paddr;
|
||
}
|
||
else
|
||
phdrs_vaddr = bed->maxpagesize + bed->s->sizeof_ehdr;
|
||
}
|
||
|
||
p->p_filesz += alloc * bed->s->sizeof_phdr;
|
||
p->p_memsz += alloc * bed->s->sizeof_phdr;
|
||
}
|
||
|
||
if (p->p_type == PT_LOAD
|
||
|| (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core))
|
||
{
|
||
if (! m->includes_filehdr && ! m->includes_phdrs)
|
||
p->p_offset = off;
|
||
else
|
||
{
|
||
file_ptr adjust;
|
||
|
||
adjust = off - (p->p_offset + p->p_filesz);
|
||
p->p_filesz += adjust;
|
||
p->p_memsz += adjust;
|
||
}
|
||
}
|
||
|
||
voff = off;
|
||
|
||
for (i = 0, secpp = m->sections; i < m->count; i++, secpp++)
|
||
{
|
||
asection *sec;
|
||
flagword flags;
|
||
bfd_size_type align;
|
||
|
||
sec = *secpp;
|
||
flags = sec->flags;
|
||
align = 1 << bfd_get_section_alignment (abfd, sec);
|
||
|
||
/* The section may have artificial alignment forced by a
|
||
link script. Notice this case by the gap between the
|
||
cumulative phdr vma and the section's vma. */
|
||
if (p->p_vaddr + p->p_memsz < sec->vma)
|
||
{
|
||
bfd_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);
|
||
|
||
p->p_memsz += adjust;
|
||
off += adjust;
|
||
voff += adjust;
|
||
if ((flags & SEC_LOAD) != 0)
|
||
p->p_filesz += adjust;
|
||
}
|
||
|
||
if (p->p_type == PT_LOAD)
|
||
{
|
||
bfd_signed_vma adjust;
|
||
|
||
if ((flags & SEC_LOAD) != 0)
|
||
{
|
||
adjust = sec->lma - (p->p_paddr + p->p_memsz);
|
||
if (adjust < 0)
|
||
adjust = 0;
|
||
}
|
||
else if ((flags & SEC_ALLOC) != 0)
|
||
{
|
||
/* The section VMA must equal the file position
|
||
modulo the page size. FIXME: I'm not sure if
|
||
this adjustment is really necessary. We used to
|
||
not have the SEC_LOAD case just above, and then
|
||
this was necessary, but now I'm not sure. */
|
||
if ((abfd->flags & D_PAGED) != 0)
|
||
adjust = (sec->vma - voff) % bed->maxpagesize;
|
||
else
|
||
adjust = (sec->vma - voff) % align;
|
||
}
|
||
else
|
||
adjust = 0;
|
||
|
||
if (adjust != 0)
|
||
{
|
||
if (i == 0)
|
||
{
|
||
(* _bfd_error_handler)
|
||
(_("Error: First section in segment (%s) starts at 0x%x"),
|
||
bfd_section_name (abfd, sec), sec->lma);
|
||
(* _bfd_error_handler)
|
||
(_(" whereas segment starts at 0x%x"),
|
||
p->p_paddr);
|
||
|
||
return false;
|
||
}
|
||
p->p_memsz += adjust;
|
||
off += adjust;
|
||
voff += adjust;
|
||
if ((flags & SEC_LOAD) != 0)
|
||
p->p_filesz += adjust;
|
||
}
|
||
|
||
sec->filepos = off;
|
||
|
||
/* We check SEC_HAS_CONTENTS here because if NOLOAD is
|
||
used in a linker script we may have a section with
|
||
SEC_LOAD clear but which is supposed to have
|
||
contents. */
|
||
if ((flags & SEC_LOAD) != 0
|
||
|| (flags & SEC_HAS_CONTENTS) != 0)
|
||
off += sec->_raw_size;
|
||
|
||
if ((flags & SEC_ALLOC) != 0)
|
||
voff += sec->_raw_size;
|
||
}
|
||
|
||
if (p->p_type == PT_NOTE && bfd_get_format (abfd) == bfd_core)
|
||
{
|
||
if (i == 0) /* the actual "note" segment */
|
||
{ /* this one actually contains everything. */
|
||
sec->filepos = off;
|
||
p->p_filesz = sec->_raw_size;
|
||
off += sec->_raw_size;
|
||
voff = off;
|
||
}
|
||
else /* fake sections -- don't need to be written */
|
||
{
|
||
sec->filepos = 0;
|
||
sec->_raw_size = 0;
|
||
flags = sec->flags = 0; /* no contents */
|
||
}
|
||
p->p_memsz = 0;
|
||
p->p_align = 1;
|
||
}
|
||
else
|
||
{
|
||
p->p_memsz += sec->_raw_size;
|
||
|
||
if ((flags & SEC_LOAD) != 0)
|
||
p->p_filesz += sec->_raw_size;
|
||
|
||
if (align > p->p_align
|
||
&& (p->p_type != PT_LOAD || (abfd->flags & D_PAGED) == 0))
|
||
p->p_align = align;
|
||
}
|
||
|
||
if (! m->p_flags_valid)
|
||
{
|
||
p->p_flags |= PF_R;
|
||
if ((flags & SEC_CODE) != 0)
|
||
p->p_flags |= PF_X;
|
||
if ((flags & SEC_READONLY) == 0)
|
||
p->p_flags |= PF_W;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Now that we have set the section file positions, we can set up
|
||
the file positions for the non PT_LOAD segments. */
|
||
for (m = elf_tdata (abfd)->segment_map, p = phdrs;
|
||
m != NULL;
|
||
m = m->next, p++)
|
||
{
|
||
if (p->p_type != PT_LOAD && m->count > 0)
|
||
{
|
||
BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs);
|
||
p->p_offset = m->sections[0]->filepos;
|
||
}
|
||
if (m->count == 0)
|
||
{
|
||
if (m->includes_filehdr)
|
||
{
|
||
p->p_vaddr = filehdr_vaddr;
|
||
if (! m->p_paddr_valid)
|
||
p->p_paddr = filehdr_paddr;
|
||
}
|
||
else if (m->includes_phdrs)
|
||
{
|
||
p->p_vaddr = phdrs_vaddr;
|
||
if (! m->p_paddr_valid)
|
||
p->p_paddr = phdrs_paddr;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Clear out any program headers we allocated but did not use. */
|
||
for (; count < alloc; count++, p++)
|
||
{
|
||
memset (p, 0, sizeof *p);
|
||
p->p_type = PT_NULL;
|
||
}
|
||
|
||
elf_tdata (abfd)->phdr = phdrs;
|
||
|
||
elf_tdata (abfd)->next_file_pos = off;
|
||
|
||
/* Write out the program headers. */
|
||
if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0
|
||
|| bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Get the size of the program header.
|
||
|
||
If this is called by the linker before any of the section VMA's are set, it
|
||
can't calculate the correct value for a strange memory layout. This only
|
||
happens when SIZEOF_HEADERS is used in a linker script. In this case,
|
||
SORTED_HDRS is NULL and we assume the normal scenario of one text and one
|
||
data segment (exclusive of .interp and .dynamic).
|
||
|
||
??? User written scripts must either not use SIZEOF_HEADERS, or assume there
|
||
will be two segments. */
|
||
|
||
static bfd_size_type
|
||
get_program_header_size (abfd)
|
||
bfd *abfd;
|
||
{
|
||
size_t segs;
|
||
asection *s;
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
/* We can't return a different result each time we're called. */
|
||
if (elf_tdata (abfd)->program_header_size != 0)
|
||
return elf_tdata (abfd)->program_header_size;
|
||
|
||
if (elf_tdata (abfd)->segment_map != NULL)
|
||
{
|
||
struct elf_segment_map *m;
|
||
|
||
segs = 0;
|
||
for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
|
||
++segs;
|
||
elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
|
||
return elf_tdata (abfd)->program_header_size;
|
||
}
|
||
|
||
/* Assume we will need exactly two PT_LOAD segments: one for text
|
||
and one for data. */
|
||
segs = 2;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".interp");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0)
|
||
{
|
||
/* If we have a loadable interpreter section, we need a
|
||
PT_INTERP segment. In this case, assume we also need a
|
||
PT_PHDR segment, although that may not be true for all
|
||
targets. */
|
||
segs += 2;
|
||
}
|
||
|
||
if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
|
||
{
|
||
/* We need a PT_DYNAMIC segment. */
|
||
++segs;
|
||
}
|
||
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LOAD) != 0
|
||
&& strncmp (s->name, ".note", 5) == 0)
|
||
{
|
||
/* We need a PT_NOTE segment. */
|
||
++segs;
|
||
}
|
||
}
|
||
|
||
/* Let the backend count up any program headers it might need. */
|
||
if (bed->elf_backend_additional_program_headers)
|
||
{
|
||
int a;
|
||
|
||
a = (*bed->elf_backend_additional_program_headers) (abfd);
|
||
if (a == -1)
|
||
abort ();
|
||
segs += a;
|
||
}
|
||
|
||
elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr;
|
||
return elf_tdata (abfd)->program_header_size;
|
||
}
|
||
|
||
/* Work out the file positions of all the sections. This is called by
|
||
_bfd_elf_compute_section_file_positions. All the section sizes and
|
||
VMAs must be known before this is called.
|
||
|
||
We do not consider reloc sections at this point, unless they form
|
||
part of the loadable image. Reloc sections are assigned file
|
||
positions in assign_file_positions_for_relocs, which is called by
|
||
write_object_contents and final_link.
|
||
|
||
We also don't set the positions of the .symtab and .strtab here. */
|
||
|
||
static boolean
|
||
assign_file_positions_except_relocs (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_obj_tdata * const tdata = elf_tdata (abfd);
|
||
Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
|
||
Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
|
||
file_ptr off;
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0
|
||
&& bfd_get_format (abfd) != bfd_core)
|
||
{
|
||
Elf_Internal_Shdr **hdrpp;
|
||
unsigned int i;
|
||
|
||
/* Start after the ELF header. */
|
||
off = i_ehdrp->e_ehsize;
|
||
|
||
/* We are not creating an executable, which means that we are
|
||
not creating a program header, and that the actual order of
|
||
the sections in the file is unimportant. */
|
||
for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
|
||
{
|
||
Elf_Internal_Shdr *hdr;
|
||
|
||
hdr = *hdrpp;
|
||
if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
|
||
{
|
||
hdr->sh_offset = -1;
|
||
continue;
|
||
}
|
||
if (i == tdata->symtab_section
|
||
|| i == tdata->strtab_section)
|
||
{
|
||
hdr->sh_offset = -1;
|
||
continue;
|
||
}
|
||
|
||
off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
unsigned int i;
|
||
Elf_Internal_Shdr **hdrpp;
|
||
|
||
/* Assign file positions for the loaded sections based on the
|
||
assignment of sections to segments. */
|
||
if (! assign_file_positions_for_segments (abfd))
|
||
return false;
|
||
|
||
/* Assign file positions for the other sections. */
|
||
|
||
off = elf_tdata (abfd)->next_file_pos;
|
||
for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
|
||
{
|
||
Elf_Internal_Shdr *hdr;
|
||
|
||
hdr = *hdrpp;
|
||
if (hdr->bfd_section != NULL
|
||
&& hdr->bfd_section->filepos != 0)
|
||
hdr->sh_offset = hdr->bfd_section->filepos;
|
||
else if ((hdr->sh_flags & SHF_ALLOC) != 0)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: warning: allocated section `%s' not in segment"),
|
||
bfd_get_filename (abfd),
|
||
(hdr->bfd_section == NULL
|
||
? "*unknown*"
|
||
: hdr->bfd_section->name)));
|
||
if ((abfd->flags & D_PAGED) != 0)
|
||
off += (hdr->sh_addr - off) % bed->maxpagesize;
|
||
else
|
||
off += (hdr->sh_addr - off) % hdr->sh_addralign;
|
||
off = _bfd_elf_assign_file_position_for_section (hdr, off,
|
||
false);
|
||
}
|
||
else if (hdr->sh_type == SHT_REL
|
||
|| hdr->sh_type == SHT_RELA
|
||
|| hdr == i_shdrpp[tdata->symtab_section]
|
||
|| hdr == i_shdrpp[tdata->strtab_section])
|
||
hdr->sh_offset = -1;
|
||
else
|
||
off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
|
||
}
|
||
}
|
||
|
||
/* Place the section headers. */
|
||
off = align_file_position (off, bed->s->file_align);
|
||
i_ehdrp->e_shoff = off;
|
||
off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
|
||
|
||
elf_tdata (abfd)->next_file_pos = off;
|
||
|
||
return true;
|
||
}
|
||
|
||
static boolean
|
||
prep_headers (abfd)
|
||
bfd *abfd;
|
||
{
|
||
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
|
||
Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
|
||
Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
|
||
int count;
|
||
struct bfd_strtab_hash *shstrtab;
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
i_ehdrp = elf_elfheader (abfd);
|
||
i_shdrp = elf_elfsections (abfd);
|
||
|
||
shstrtab = _bfd_elf_stringtab_init ();
|
||
if (shstrtab == NULL)
|
||
return false;
|
||
|
||
elf_shstrtab (abfd) = shstrtab;
|
||
|
||
i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
|
||
i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
|
||
i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
|
||
i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
|
||
|
||
i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
|
||
i_ehdrp->e_ident[EI_DATA] =
|
||
bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB;
|
||
i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
|
||
|
||
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
|
||
i_ehdrp->e_ident[EI_ABIVERSION] = 0;
|
||
|
||
for (count = EI_PAD; count < EI_NIDENT; count++)
|
||
i_ehdrp->e_ident[count] = 0;
|
||
|
||
#ifdef __FreeBSD__
|
||
/* #ifdef BRANDELF_CHANGE_BOOTSTRAP */
|
||
#define _OLD_EI_BRAND_OFFSET 8
|
||
#define _OLD_BRANDING "FreeBSD"
|
||
strncpy((char *) &i_ehdrp->e_ident[_OLD_EI_BRAND_OFFSET], _OLD_BRANDING,
|
||
EI_NIDENT-_OLD_EI_BRAND_OFFSET);
|
||
/* #endif */
|
||
#endif
|
||
|
||
if ((abfd->flags & DYNAMIC) != 0)
|
||
i_ehdrp->e_type = ET_DYN;
|
||
else if ((abfd->flags & EXEC_P) != 0)
|
||
i_ehdrp->e_type = ET_EXEC;
|
||
else if (bfd_get_format (abfd) == bfd_core)
|
||
i_ehdrp->e_type = ET_CORE;
|
||
else
|
||
i_ehdrp->e_type = ET_REL;
|
||
|
||
switch (bfd_get_arch (abfd))
|
||
{
|
||
case bfd_arch_unknown:
|
||
i_ehdrp->e_machine = EM_NONE;
|
||
break;
|
||
case bfd_arch_sparc:
|
||
if (bed->s->arch_size == 64)
|
||
i_ehdrp->e_machine = EM_SPARCV9;
|
||
else
|
||
i_ehdrp->e_machine = EM_SPARC;
|
||
break;
|
||
case bfd_arch_i370:
|
||
i_ehdrp->e_machine = EM_S370;
|
||
break;
|
||
case bfd_arch_i386:
|
||
i_ehdrp->e_machine = EM_386;
|
||
break;
|
||
case bfd_arch_m68k:
|
||
i_ehdrp->e_machine = EM_68K;
|
||
break;
|
||
case bfd_arch_m88k:
|
||
i_ehdrp->e_machine = EM_88K;
|
||
break;
|
||
case bfd_arch_i860:
|
||
i_ehdrp->e_machine = EM_860;
|
||
break;
|
||
case bfd_arch_i960:
|
||
i_ehdrp->e_machine = EM_960;
|
||
break;
|
||
case bfd_arch_mips: /* MIPS Rxxxx */
|
||
i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
|
||
break;
|
||
case bfd_arch_hppa:
|
||
i_ehdrp->e_machine = EM_PARISC;
|
||
break;
|
||
case bfd_arch_powerpc:
|
||
i_ehdrp->e_machine = EM_PPC;
|
||
break;
|
||
case bfd_arch_alpha:
|
||
i_ehdrp->e_machine = EM_ALPHA;
|
||
break;
|
||
case bfd_arch_sh:
|
||
i_ehdrp->e_machine = EM_SH;
|
||
break;
|
||
case bfd_arch_d10v:
|
||
i_ehdrp->e_machine = EM_CYGNUS_D10V;
|
||
break;
|
||
case bfd_arch_d30v:
|
||
i_ehdrp->e_machine = EM_CYGNUS_D30V;
|
||
break;
|
||
case bfd_arch_fr30:
|
||
i_ehdrp->e_machine = EM_CYGNUS_FR30;
|
||
break;
|
||
case bfd_arch_mcore:
|
||
i_ehdrp->e_machine = EM_MCORE;
|
||
break;
|
||
case bfd_arch_avr:
|
||
i_ehdrp->e_machine = EM_AVR;
|
||
break;
|
||
case bfd_arch_v850:
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
default:
|
||
case 0: i_ehdrp->e_machine = EM_CYGNUS_V850; break;
|
||
}
|
||
break;
|
||
case bfd_arch_arc:
|
||
i_ehdrp->e_machine = EM_CYGNUS_ARC;
|
||
break;
|
||
case bfd_arch_arm:
|
||
i_ehdrp->e_machine = EM_ARM;
|
||
break;
|
||
case bfd_arch_m32r:
|
||
i_ehdrp->e_machine = EM_CYGNUS_M32R;
|
||
break;
|
||
case bfd_arch_mn10200:
|
||
i_ehdrp->e_machine = EM_CYGNUS_MN10200;
|
||
break;
|
||
case bfd_arch_mn10300:
|
||
i_ehdrp->e_machine = EM_CYGNUS_MN10300;
|
||
break;
|
||
case bfd_arch_pj:
|
||
i_ehdrp->e_machine = EM_PJ;
|
||
break;
|
||
/* also note that EM_M32, AT&T WE32100 is unknown to bfd */
|
||
default:
|
||
i_ehdrp->e_machine = EM_NONE;
|
||
}
|
||
i_ehdrp->e_version = bed->s->ev_current;
|
||
i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
|
||
|
||
/* no program header, for now. */
|
||
i_ehdrp->e_phoff = 0;
|
||
i_ehdrp->e_phentsize = 0;
|
||
i_ehdrp->e_phnum = 0;
|
||
|
||
/* each bfd section is section header entry */
|
||
i_ehdrp->e_entry = bfd_get_start_address (abfd);
|
||
i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
|
||
|
||
/* if we're building an executable, we'll need a program header table */
|
||
if (abfd->flags & EXEC_P)
|
||
{
|
||
/* it all happens later */
|
||
#if 0
|
||
i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
|
||
|
||
/* elf_build_phdrs() returns a (NULL-terminated) array of
|
||
Elf_Internal_Phdrs */
|
||
i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
|
||
i_ehdrp->e_phoff = outbase;
|
||
outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
i_ehdrp->e_phentsize = 0;
|
||
i_phdrp = 0;
|
||
i_ehdrp->e_phoff = 0;
|
||
}
|
||
|
||
elf_tdata (abfd)->symtab_hdr.sh_name =
|
||
(unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
|
||
elf_tdata (abfd)->strtab_hdr.sh_name =
|
||
(unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
|
||
elf_tdata (abfd)->shstrtab_hdr.sh_name =
|
||
(unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
|
||
if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
|
||
|| elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
|
||
|| elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Assign file positions for all the reloc sections which are not part
|
||
of the loadable file image. */
|
||
|
||
void
|
||
_bfd_elf_assign_file_positions_for_relocs (abfd)
|
||
bfd *abfd;
|
||
{
|
||
file_ptr off;
|
||
unsigned int i;
|
||
Elf_Internal_Shdr **shdrpp;
|
||
|
||
off = elf_tdata (abfd)->next_file_pos;
|
||
|
||
for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
|
||
i < elf_elfheader (abfd)->e_shnum;
|
||
i++, shdrpp++)
|
||
{
|
||
Elf_Internal_Shdr *shdrp;
|
||
|
||
shdrp = *shdrpp;
|
||
if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
|
||
&& shdrp->sh_offset == -1)
|
||
off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
|
||
}
|
||
|
||
elf_tdata (abfd)->next_file_pos = off;
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_write_object_contents (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
Elf_Internal_Ehdr *i_ehdrp;
|
||
Elf_Internal_Shdr **i_shdrp;
|
||
boolean failed;
|
||
unsigned int count;
|
||
|
||
if (! abfd->output_has_begun
|
||
&& ! _bfd_elf_compute_section_file_positions
|
||
(abfd, (struct bfd_link_info *) NULL))
|
||
return false;
|
||
|
||
i_shdrp = elf_elfsections (abfd);
|
||
i_ehdrp = elf_elfheader (abfd);
|
||
|
||
failed = false;
|
||
bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
|
||
if (failed)
|
||
return false;
|
||
|
||
_bfd_elf_assign_file_positions_for_relocs (abfd);
|
||
|
||
/* After writing the headers, we need to write the sections too... */
|
||
for (count = 1; count < i_ehdrp->e_shnum; count++)
|
||
{
|
||
if (bed->elf_backend_section_processing)
|
||
(*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
|
||
if (i_shdrp[count]->contents)
|
||
{
|
||
if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
|
||
|| (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
|
||
1, abfd)
|
||
!= i_shdrp[count]->sh_size))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Write out the section header names. */
|
||
if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
|
||
|| ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
|
||
return false;
|
||
|
||
if (bed->elf_backend_final_write_processing)
|
||
(*bed->elf_backend_final_write_processing) (abfd,
|
||
elf_tdata (abfd)->linker);
|
||
|
||
return bed->s->write_shdrs_and_ehdr (abfd);
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_write_corefile_contents (abfd)
|
||
bfd *abfd;
|
||
{
|
||
/* Hopefully this can be done just like an object file. */
|
||
return _bfd_elf_write_object_contents (abfd);
|
||
}
|
||
/* given a section, search the header to find them... */
|
||
int
|
||
_bfd_elf_section_from_bfd_section (abfd, asect)
|
||
bfd *abfd;
|
||
struct sec *asect;
|
||
{
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
|
||
int index;
|
||
Elf_Internal_Shdr *hdr;
|
||
int maxindex = elf_elfheader (abfd)->e_shnum;
|
||
|
||
for (index = 0; index < maxindex; index++)
|
||
{
|
||
hdr = i_shdrp[index];
|
||
if (hdr->bfd_section == asect)
|
||
return index;
|
||
}
|
||
|
||
if (bed->elf_backend_section_from_bfd_section)
|
||
{
|
||
for (index = 0; index < maxindex; index++)
|
||
{
|
||
int retval;
|
||
|
||
hdr = i_shdrp[index];
|
||
retval = index;
|
||
if ((*bed->elf_backend_section_from_bfd_section)
|
||
(abfd, hdr, asect, &retval))
|
||
return retval;
|
||
}
|
||
}
|
||
|
||
if (bfd_is_abs_section (asect))
|
||
return SHN_ABS;
|
||
if (bfd_is_com_section (asect))
|
||
return SHN_COMMON;
|
||
if (bfd_is_und_section (asect))
|
||
return SHN_UNDEF;
|
||
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Given a BFD symbol, return the index in the ELF symbol table, or -1
|
||
on error. */
|
||
|
||
int
|
||
_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
|
||
bfd *abfd;
|
||
asymbol **asym_ptr_ptr;
|
||
{
|
||
asymbol *asym_ptr = *asym_ptr_ptr;
|
||
int idx;
|
||
flagword flags = asym_ptr->flags;
|
||
|
||
/* When gas creates relocations against local labels, it creates its
|
||
own symbol for the section, but does put the symbol into the
|
||
symbol chain, so udata is 0. When the linker is generating
|
||
relocatable output, this section symbol may be for one of the
|
||
input sections rather than the output section. */
|
||
if (asym_ptr->udata.i == 0
|
||
&& (flags & BSF_SECTION_SYM)
|
||
&& asym_ptr->section)
|
||
{
|
||
int indx;
|
||
|
||
if (asym_ptr->section->output_section != NULL)
|
||
indx = asym_ptr->section->output_section->index;
|
||
else
|
||
indx = asym_ptr->section->index;
|
||
if (elf_section_syms (abfd)[indx])
|
||
asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
|
||
}
|
||
|
||
idx = asym_ptr->udata.i;
|
||
|
||
if (idx == 0)
|
||
{
|
||
/* This case can occur when using --strip-symbol on a symbol
|
||
which is used in a relocation entry. */
|
||
(*_bfd_error_handler)
|
||
(_("%s: symbol `%s' required but not present"),
|
||
bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr));
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return -1;
|
||
}
|
||
|
||
#if DEBUG & 4
|
||
{
|
||
fprintf (stderr,
|
||
_("elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n"),
|
||
(long) asym_ptr, asym_ptr->name, idx, flags,
|
||
elf_symbol_flags (flags));
|
||
fflush (stderr);
|
||
}
|
||
#endif
|
||
|
||
return idx;
|
||
}
|
||
|
||
/* Copy private BFD data. This copies any program header information. */
|
||
|
||
static boolean
|
||
copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
Elf_Internal_Ehdr *iehdr;
|
||
struct elf_segment_map *mfirst;
|
||
struct elf_segment_map **pm;
|
||
struct elf_segment_map *m;
|
||
Elf_Internal_Phdr *p;
|
||
unsigned int i;
|
||
unsigned int num_segments;
|
||
boolean phdr_included = false;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
if (elf_tdata (ibfd)->phdr == NULL)
|
||
return true;
|
||
|
||
iehdr = elf_elfheader (ibfd);
|
||
|
||
mfirst = NULL;
|
||
pm = &mfirst;
|
||
|
||
num_segments = elf_elfheader (ibfd)->e_phnum;
|
||
|
||
#define IS_CONTAINED_BY(addr, len, bottom, phdr) \
|
||
((addr) >= (bottom) \
|
||
&& ( ((addr) + (len)) <= ((bottom) + (phdr)->p_memsz) \
|
||
|| ((addr) + (len)) <= ((bottom) + (phdr)->p_filesz)))
|
||
|
||
/* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
|
||
|
||
#define IS_COREFILE_NOTE(p, s) \
|
||
(p->p_type == PT_NOTE \
|
||
&& bfd_get_format (ibfd) == bfd_core \
|
||
&& s->vma == 0 && s->lma == 0 \
|
||
&& (bfd_vma) s->filepos >= p->p_offset \
|
||
&& (bfd_vma) s->filepos + s->_raw_size \
|
||
<= p->p_offset + p->p_filesz)
|
||
|
||
/* The complicated case when p_vaddr is 0 is to handle the Solaris
|
||
linker, which generates a PT_INTERP section with p_vaddr and
|
||
p_memsz set to 0. */
|
||
|
||
#define IS_SOLARIS_PT_INTERP(p, s) \
|
||
(p->p_vaddr == 0 \
|
||
&& p->p_filesz > 0 \
|
||
&& (s->flags & SEC_HAS_CONTENTS) != 0 \
|
||
&& s->_raw_size > 0 \
|
||
&& (bfd_vma) s->filepos >= p->p_offset \
|
||
&& ((bfd_vma) s->filepos + s->_raw_size \
|
||
<= p->p_offset + p->p_filesz))
|
||
|
||
/* Scan through the segments specified in the program header
|
||
of the input BFD. */
|
||
for (i = 0, p = elf_tdata (ibfd)->phdr; i < num_segments; i++, p++)
|
||
{
|
||
unsigned int csecs;
|
||
asection *s;
|
||
asection **sections;
|
||
asection *os;
|
||
unsigned int isec;
|
||
bfd_vma matching_lma;
|
||
bfd_vma suggested_lma;
|
||
unsigned int j;
|
||
|
||
/* For each section in the input BFD, decide if it should be
|
||
included in the current segment. A section will be included
|
||
if it is within the address space of the segment, and it is
|
||
an allocated segment, and there is an output section
|
||
associated with it. */
|
||
csecs = 0;
|
||
for (s = ibfd->sections; s != NULL; s = s->next)
|
||
if (s->output_section != NULL)
|
||
{
|
||
if ((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p)
|
||
|| IS_SOLARIS_PT_INTERP (p, s))
|
||
&& (s->flags & SEC_ALLOC) != 0)
|
||
++csecs;
|
||
else if (IS_COREFILE_NOTE (p, s))
|
||
++csecs;
|
||
}
|
||
|
||
/* Allocate a segment map big enough to contain all of the
|
||
sections we have selected. */
|
||
m = ((struct elf_segment_map *)
|
||
bfd_alloc (obfd,
|
||
(sizeof (struct elf_segment_map)
|
||
+ ((size_t) csecs - 1) * sizeof (asection *))));
|
||
if (m == NULL)
|
||
return false;
|
||
|
||
/* Initialise the fields of the segment map. Default to
|
||
using the physical address of the segment in the input BFD. */
|
||
m->next = NULL;
|
||
m->p_type = p->p_type;
|
||
m->p_flags = p->p_flags;
|
||
m->p_flags_valid = 1;
|
||
m->p_paddr = p->p_paddr;
|
||
m->p_paddr_valid = 1;
|
||
|
||
/* Determine if this segment contains the ELF file header
|
||
and if it contains the program headers themselves. */
|
||
m->includes_filehdr = (p->p_offset == 0
|
||
&& p->p_filesz >= iehdr->e_ehsize);
|
||
|
||
m->includes_phdrs = 0;
|
||
|
||
if (! phdr_included || p->p_type != PT_LOAD)
|
||
{
|
||
m->includes_phdrs =
|
||
(p->p_offset <= (bfd_vma) iehdr->e_phoff
|
||
&& (p->p_offset + p->p_filesz
|
||
>= ((bfd_vma) iehdr->e_phoff
|
||
+ iehdr->e_phnum * iehdr->e_phentsize)));
|
||
if (p->p_type == PT_LOAD && m->includes_phdrs)
|
||
phdr_included = true;
|
||
}
|
||
|
||
if (csecs == 0)
|
||
{
|
||
/* Special segments, such as the PT_PHDR segment, may contain
|
||
no sections, but ordinary, loadable segments should contain
|
||
something. */
|
||
|
||
if (p->p_type == PT_LOAD)
|
||
_bfd_error_handler
|
||
(_("%s: warning: Empty loadable segment detected\n"),
|
||
bfd_get_filename (ibfd));
|
||
|
||
m->count = 0;
|
||
*pm = m;
|
||
pm = &m->next;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* Now scan the sections in the input BFD again and attempt
|
||
to add their corresponding output sections to the segment map.
|
||
The problem here is how to handle an output section which has
|
||
been moved (ie had its LMA changed). There are four possibilities:
|
||
|
||
1. None of the sections have been moved.
|
||
In this case we can continue to use the segment LMA from the
|
||
input BFD.
|
||
|
||
2. All of the sections have been moved by the same amount.
|
||
In this case we can change the segment's LMA to match the LMA
|
||
of the first section.
|
||
|
||
3. Some of the sections have been moved, others have not.
|
||
In this case those sections which have not been moved can be
|
||
placed in the current segment which will have to have its size,
|
||
and possibly its LMA changed, and a new segment or segments will
|
||
have to be created to contain the other sections.
|
||
|
||
4. The sections have been moved, but not be the same amount.
|
||
In this case we can change the segment's LMA to match the LMA
|
||
of the first section and we will have to create a new segment
|
||
or segments to contain the other sections.
|
||
|
||
In order to save time, we allocate an array to hold the section
|
||
pointers that we are interested in. As these sections get assigned
|
||
to a segment, they are removed from this array. */
|
||
|
||
sections = (asection **) bfd_malloc (sizeof (asection *) * csecs);
|
||
if (sections == NULL)
|
||
return false;
|
||
|
||
/* Step One: Scan for segment vs section LMA conflicts.
|
||
Also add the sections to the section array allocated above.
|
||
Also add the sections to the current segment. In the common
|
||
case, where the sections have not been moved, this means that
|
||
we have completely filled the segment, and there is nothing
|
||
more to do. */
|
||
|
||
isec = 0;
|
||
matching_lma = 0;
|
||
suggested_lma = 0;
|
||
|
||
for (j = 0, s = ibfd->sections; s != NULL; s = s->next)
|
||
{
|
||
os = s->output_section;
|
||
|
||
if ((((IS_CONTAINED_BY (s->vma, s->_raw_size, p->p_vaddr, p)
|
||
|| IS_SOLARIS_PT_INTERP (p, s))
|
||
&& (s->flags & SEC_ALLOC) != 0)
|
||
|| IS_COREFILE_NOTE (p, s))
|
||
&& os != NULL)
|
||
{
|
||
sections[j++] = s;
|
||
|
||
/* The Solaris native linker always sets p_paddr to 0.
|
||
We try to catch that case here, and set it to the
|
||
correct value. */
|
||
if (p->p_paddr == 0
|
||
&& p->p_vaddr != 0
|
||
&& isec == 0
|
||
&& os->lma != 0
|
||
&& (os->vma == (p->p_vaddr
|
||
+ (m->includes_filehdr
|
||
? iehdr->e_ehsize
|
||
: 0)
|
||
+ (m->includes_phdrs
|
||
? iehdr->e_phnum * iehdr->e_phentsize
|
||
: 0))))
|
||
m->p_paddr = p->p_vaddr;
|
||
|
||
/* Match up the physical address of the segment with the
|
||
LMA address of the output section. */
|
||
if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p)
|
||
|| IS_COREFILE_NOTE (p, s))
|
||
{
|
||
if (matching_lma == 0)
|
||
matching_lma = os->lma;
|
||
|
||
/* We assume that if the section fits within the segment
|
||
that it does not overlap any other section within that
|
||
segment. */
|
||
m->sections[isec++] = os;
|
||
}
|
||
else if (suggested_lma == 0)
|
||
suggested_lma = os->lma;
|
||
}
|
||
}
|
||
|
||
BFD_ASSERT (j == csecs);
|
||
|
||
/* Step Two: Adjust the physical address of the current segment,
|
||
if necessary. */
|
||
if (isec == csecs)
|
||
{
|
||
/* All of the sections fitted within the segment as currently
|
||
specified. This is the default case. Add the segment to
|
||
the list of built segments and carry on to process the next
|
||
program header in the input BFD. */
|
||
m->count = csecs;
|
||
*pm = m;
|
||
pm = &m->next;
|
||
|
||
free (sections);
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
if (matching_lma != 0)
|
||
{
|
||
/* At least one section fits inside the current segment.
|
||
Keep it, but modify its physical address to match the
|
||
LMA of the first section that fitted. */
|
||
|
||
m->p_paddr = matching_lma;
|
||
}
|
||
else
|
||
{
|
||
/* None of the sections fitted inside the current segment.
|
||
Change the current segment's physical address to match
|
||
the LMA of the first section. */
|
||
|
||
m->p_paddr = suggested_lma;
|
||
}
|
||
|
||
/* Offset the segment physical address from the lma to allow
|
||
for space taken up by elf headers. */
|
||
if (m->includes_filehdr)
|
||
m->p_paddr -= iehdr->e_ehsize;
|
||
|
||
if (m->includes_phdrs)
|
||
m->p_paddr -= iehdr->e_phnum * iehdr->e_phentsize;
|
||
}
|
||
|
||
/* Step Three: Loop over the sections again, this time assigning
|
||
those that fit to the current segment and remvoing them from the
|
||
sections array; but making sure not to leave large gaps. Once all
|
||
possible sections have been assigned to the current segment it is
|
||
added to the list of built segments and if sections still remain
|
||
to be assigned, a new segment is constructed before repeating
|
||
the loop. */
|
||
isec = 0;
|
||
do
|
||
{
|
||
m->count = 0;
|
||
suggested_lma = 0;
|
||
|
||
/* Fill the current segment with sections that fit. */
|
||
for (j = 0; j < csecs; j++)
|
||
{
|
||
s = sections[j];
|
||
|
||
if (s == NULL)
|
||
continue;
|
||
|
||
os = s->output_section;
|
||
|
||
if (IS_CONTAINED_BY (os->lma, os->_raw_size, m->p_paddr, p)
|
||
|| IS_COREFILE_NOTE (p, s))
|
||
{
|
||
if (m->count == 0)
|
||
{
|
||
/* If the first section in a segment does not start at
|
||
the beginning of the segment, then something is wrong. */
|
||
if (os->lma != (m->p_paddr
|
||
+ (m->includes_filehdr
|
||
? iehdr->e_ehsize : 0)
|
||
+ (m->includes_phdrs
|
||
? iehdr->e_phnum * iehdr->e_phentsize
|
||
: 0)))
|
||
abort ();
|
||
}
|
||
else
|
||
{
|
||
asection * prev_sec;
|
||
bfd_vma maxpagesize;
|
||
|
||
prev_sec = m->sections[m->count - 1];
|
||
maxpagesize = get_elf_backend_data (obfd)->maxpagesize;
|
||
|
||
/* If the gap between the end of the previous section
|
||
and the start of this section is more than maxpagesize
|
||
then we need to start a new segment. */
|
||
if (BFD_ALIGN (prev_sec->lma + prev_sec->_raw_size, maxpagesize)
|
||
< BFD_ALIGN (os->lma, maxpagesize))
|
||
{
|
||
if (suggested_lma == 0)
|
||
suggested_lma = os->lma;
|
||
|
||
continue;
|
||
}
|
||
}
|
||
|
||
m->sections[m->count++] = os;
|
||
++isec;
|
||
sections[j] = NULL;
|
||
}
|
||
else if (suggested_lma == 0)
|
||
suggested_lma = os->lma;
|
||
}
|
||
|
||
BFD_ASSERT (m->count > 0);
|
||
|
||
/* Add the current segment to the list of built segments. */
|
||
*pm = m;
|
||
pm = &m->next;
|
||
|
||
if (isec < csecs)
|
||
{
|
||
/* We still have not allocated all of the sections to
|
||
segments. Create a new segment here, initialise it
|
||
and carry on looping. */
|
||
|
||
m = ((struct elf_segment_map *)
|
||
bfd_alloc (obfd,
|
||
(sizeof (struct elf_segment_map)
|
||
+ ((size_t) csecs - 1) * sizeof (asection *))));
|
||
if (m == NULL)
|
||
return false;
|
||
|
||
/* Initialise the fields of the segment map. Set the physical
|
||
physical address to the LMA of the first section that has
|
||
not yet been assigned. */
|
||
|
||
m->next = NULL;
|
||
m->p_type = p->p_type;
|
||
m->p_flags = p->p_flags;
|
||
m->p_flags_valid = 1;
|
||
m->p_paddr = suggested_lma;
|
||
m->p_paddr_valid = 1;
|
||
m->includes_filehdr = 0;
|
||
m->includes_phdrs = 0;
|
||
}
|
||
}
|
||
while (isec < csecs);
|
||
|
||
free (sections);
|
||
}
|
||
|
||
/* The Solaris linker creates program headers in which all the
|
||
p_paddr fields are zero. When we try to objcopy or strip such a
|
||
file, we get confused. Check for this case, and if we find it
|
||
reset the p_paddr_valid fields. */
|
||
for (m = mfirst; m != NULL; m = m->next)
|
||
if (m->p_paddr != 0)
|
||
break;
|
||
if (m == NULL)
|
||
{
|
||
for (m = mfirst; m != NULL; m = m->next)
|
||
m->p_paddr_valid = 0;
|
||
}
|
||
|
||
elf_tdata (obfd)->segment_map = mfirst;
|
||
|
||
#if 0
|
||
/* Final Step: Sort the segments into ascending order of physical address. */
|
||
if (mfirst != NULL)
|
||
{
|
||
struct elf_segment_map* prev;
|
||
|
||
prev = mfirst;
|
||
for (m = mfirst->next; m != NULL; prev = m, m = m->next)
|
||
{
|
||
/* Yes I know - its a bubble sort....*/
|
||
if (m->next != NULL && (m->next->p_paddr < m->p_paddr))
|
||
{
|
||
/* swap m and m->next */
|
||
prev->next = m->next;
|
||
m->next = m->next->next;
|
||
prev->next->next = m;
|
||
|
||
/* restart loop. */
|
||
m = mfirst;
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#undef IS_CONTAINED_BY
|
||
#undef IS_SOLARIS_PT_INTERP
|
||
#undef IS_COREFILE_NOTE
|
||
return true;
|
||
}
|
||
|
||
/* Copy private section information. This copies over the entsize
|
||
field, and sometimes the info field. */
|
||
|
||
boolean
|
||
_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
|
||
bfd *ibfd;
|
||
asection *isec;
|
||
bfd *obfd;
|
||
asection *osec;
|
||
{
|
||
Elf_Internal_Shdr *ihdr, *ohdr;
|
||
|
||
if (ibfd->xvec->flavour != bfd_target_elf_flavour
|
||
|| obfd->xvec->flavour != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
/* Copy over private BFD data if it has not already been copied.
|
||
This must be done here, rather than in the copy_private_bfd_data
|
||
entry point, because the latter is called after the section
|
||
contents have been set, which means that the program headers have
|
||
already been worked out. */
|
||
if (elf_tdata (obfd)->segment_map == NULL
|
||
&& elf_tdata (ibfd)->phdr != NULL)
|
||
{
|
||
asection *s;
|
||
|
||
/* Only set up the segments if there are no more SEC_ALLOC
|
||
sections. FIXME: This won't do the right thing if objcopy is
|
||
used to remove the last SEC_ALLOC section, since objcopy
|
||
won't call this routine in that case. */
|
||
for (s = isec->next; s != NULL; s = s->next)
|
||
if ((s->flags & SEC_ALLOC) != 0)
|
||
break;
|
||
if (s == NULL)
|
||
{
|
||
if (! copy_private_bfd_data (ibfd, obfd))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
ihdr = &elf_section_data (isec)->this_hdr;
|
||
ohdr = &elf_section_data (osec)->this_hdr;
|
||
|
||
ohdr->sh_entsize = ihdr->sh_entsize;
|
||
|
||
if (ihdr->sh_type == SHT_SYMTAB
|
||
|| ihdr->sh_type == SHT_DYNSYM
|
||
|| ihdr->sh_type == SHT_GNU_verneed
|
||
|| ihdr->sh_type == SHT_GNU_verdef)
|
||
ohdr->sh_info = ihdr->sh_info;
|
||
|
||
elf_section_data (osec)->use_rela_p
|
||
= elf_section_data (isec)->use_rela_p;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Copy private symbol information. If this symbol is in a section
|
||
which we did not map into a BFD section, try to map the section
|
||
index correctly. We use special macro definitions for the mapped
|
||
section indices; these definitions are interpreted by the
|
||
swap_out_syms function. */
|
||
|
||
#define MAP_ONESYMTAB (SHN_LORESERVE - 1)
|
||
#define MAP_DYNSYMTAB (SHN_LORESERVE - 2)
|
||
#define MAP_STRTAB (SHN_LORESERVE - 3)
|
||
#define MAP_SHSTRTAB (SHN_LORESERVE - 4)
|
||
|
||
boolean
|
||
_bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg)
|
||
bfd *ibfd;
|
||
asymbol *isymarg;
|
||
bfd *obfd;
|
||
asymbol *osymarg;
|
||
{
|
||
elf_symbol_type *isym, *osym;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
isym = elf_symbol_from (ibfd, isymarg);
|
||
osym = elf_symbol_from (obfd, osymarg);
|
||
|
||
if (isym != NULL
|
||
&& osym != NULL
|
||
&& bfd_is_abs_section (isym->symbol.section))
|
||
{
|
||
unsigned int shndx;
|
||
|
||
shndx = isym->internal_elf_sym.st_shndx;
|
||
if (shndx == elf_onesymtab (ibfd))
|
||
shndx = MAP_ONESYMTAB;
|
||
else if (shndx == elf_dynsymtab (ibfd))
|
||
shndx = MAP_DYNSYMTAB;
|
||
else if (shndx == elf_tdata (ibfd)->strtab_section)
|
||
shndx = MAP_STRTAB;
|
||
else if (shndx == elf_tdata (ibfd)->shstrtab_section)
|
||
shndx = MAP_SHSTRTAB;
|
||
osym->internal_elf_sym.st_shndx = shndx;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Swap out the symbols. */
|
||
|
||
static boolean
|
||
swap_out_syms (abfd, sttp, relocatable_p)
|
||
bfd *abfd;
|
||
struct bfd_strtab_hash **sttp;
|
||
int relocatable_p;
|
||
{
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
if (!elf_map_symbols (abfd))
|
||
return false;
|
||
|
||
/* Dump out the symtabs. */
|
||
{
|
||
int symcount = bfd_get_symcount (abfd);
|
||
asymbol **syms = bfd_get_outsymbols (abfd);
|
||
struct bfd_strtab_hash *stt;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Shdr *symstrtab_hdr;
|
||
char *outbound_syms;
|
||
int idx;
|
||
|
||
stt = _bfd_elf_stringtab_init ();
|
||
if (stt == NULL)
|
||
return false;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
symtab_hdr->sh_type = SHT_SYMTAB;
|
||
symtab_hdr->sh_entsize = bed->s->sizeof_sym;
|
||
symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
|
||
symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
|
||
symtab_hdr->sh_addralign = bed->s->file_align;
|
||
|
||
symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
|
||
symstrtab_hdr->sh_type = SHT_STRTAB;
|
||
|
||
outbound_syms = bfd_alloc (abfd,
|
||
(1 + symcount) * bed->s->sizeof_sym);
|
||
if (outbound_syms == NULL)
|
||
return false;
|
||
symtab_hdr->contents = (PTR) outbound_syms;
|
||
|
||
/* now generate the data (for "contents") */
|
||
{
|
||
/* Fill in zeroth symbol and swap it out. */
|
||
Elf_Internal_Sym sym;
|
||
sym.st_name = 0;
|
||
sym.st_value = 0;
|
||
sym.st_size = 0;
|
||
sym.st_info = 0;
|
||
sym.st_other = 0;
|
||
sym.st_shndx = SHN_UNDEF;
|
||
bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
|
||
outbound_syms += bed->s->sizeof_sym;
|
||
}
|
||
for (idx = 0; idx < symcount; idx++)
|
||
{
|
||
Elf_Internal_Sym sym;
|
||
bfd_vma value = syms[idx]->value;
|
||
elf_symbol_type *type_ptr;
|
||
flagword flags = syms[idx]->flags;
|
||
int type;
|
||
|
||
if (flags & BSF_SECTION_SYM)
|
||
/* Section symbols have no names. */
|
||
sym.st_name = 0;
|
||
else
|
||
{
|
||
sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
|
||
syms[idx]->name,
|
||
true, false);
|
||
if (sym.st_name == (unsigned long) -1)
|
||
return false;
|
||
}
|
||
|
||
type_ptr = elf_symbol_from (abfd, syms[idx]);
|
||
|
||
if ((flags & BSF_SECTION_SYM) == 0
|
||
&& bfd_is_com_section (syms[idx]->section))
|
||
{
|
||
/* ELF common symbols put the alignment into the `value' field,
|
||
and the size into the `size' field. This is backwards from
|
||
how BFD handles it, so reverse it here. */
|
||
sym.st_size = value;
|
||
if (type_ptr == NULL
|
||
|| type_ptr->internal_elf_sym.st_value == 0)
|
||
sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
|
||
else
|
||
sym.st_value = type_ptr->internal_elf_sym.st_value;
|
||
sym.st_shndx = _bfd_elf_section_from_bfd_section
|
||
(abfd, syms[idx]->section);
|
||
}
|
||
else
|
||
{
|
||
asection *sec = syms[idx]->section;
|
||
int shndx;
|
||
|
||
if (sec->output_section)
|
||
{
|
||
value += sec->output_offset;
|
||
sec = sec->output_section;
|
||
}
|
||
/* Don't add in the section vma for relocatable output. */
|
||
if (! relocatable_p)
|
||
value += sec->vma;
|
||
sym.st_value = value;
|
||
sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
|
||
|
||
if (bfd_is_abs_section (sec)
|
||
&& type_ptr != NULL
|
||
&& type_ptr->internal_elf_sym.st_shndx != 0)
|
||
{
|
||
/* This symbol is in a real ELF section which we did
|
||
not create as a BFD section. Undo the mapping done
|
||
by copy_private_symbol_data. */
|
||
shndx = type_ptr->internal_elf_sym.st_shndx;
|
||
switch (shndx)
|
||
{
|
||
case MAP_ONESYMTAB:
|
||
shndx = elf_onesymtab (abfd);
|
||
break;
|
||
case MAP_DYNSYMTAB:
|
||
shndx = elf_dynsymtab (abfd);
|
||
break;
|
||
case MAP_STRTAB:
|
||
shndx = elf_tdata (abfd)->strtab_section;
|
||
break;
|
||
case MAP_SHSTRTAB:
|
||
shndx = elf_tdata (abfd)->shstrtab_section;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
if (shndx == -1)
|
||
{
|
||
asection *sec2;
|
||
|
||
/* Writing this would be a hell of a lot easier if
|
||
we had some decent documentation on bfd, and
|
||
knew what to expect of the library, and what to
|
||
demand of applications. For example, it
|
||
appears that `objcopy' might not set the
|
||
section of a symbol to be a section that is
|
||
actually in the output file. */
|
||
sec2 = bfd_get_section_by_name (abfd, sec->name);
|
||
BFD_ASSERT (sec2 != 0);
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
|
||
BFD_ASSERT (shndx != -1);
|
||
}
|
||
}
|
||
|
||
sym.st_shndx = shndx;
|
||
}
|
||
|
||
if ((flags & BSF_FUNCTION) != 0)
|
||
type = STT_FUNC;
|
||
else if ((flags & BSF_OBJECT) != 0)
|
||
type = STT_OBJECT;
|
||
else
|
||
type = STT_NOTYPE;
|
||
|
||
/* Processor-specific types */
|
||
if (type_ptr != NULL
|
||
&& bed->elf_backend_get_symbol_type)
|
||
type = (*bed->elf_backend_get_symbol_type) (&type_ptr->internal_elf_sym, type);
|
||
|
||
if (flags & BSF_SECTION_SYM)
|
||
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
|
||
else if (bfd_is_com_section (syms[idx]->section))
|
||
sym.st_info = ELF_ST_INFO (STB_GLOBAL, type);
|
||
else if (bfd_is_und_section (syms[idx]->section))
|
||
sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
|
||
? STB_WEAK
|
||
: STB_GLOBAL),
|
||
type);
|
||
else if (flags & BSF_FILE)
|
||
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
|
||
else
|
||
{
|
||
int bind = STB_LOCAL;
|
||
|
||
if (flags & BSF_LOCAL)
|
||
bind = STB_LOCAL;
|
||
else if (flags & BSF_WEAK)
|
||
bind = STB_WEAK;
|
||
else if (flags & BSF_GLOBAL)
|
||
bind = STB_GLOBAL;
|
||
|
||
sym.st_info = ELF_ST_INFO (bind, type);
|
||
}
|
||
|
||
if (type_ptr != NULL)
|
||
sym.st_other = type_ptr->internal_elf_sym.st_other;
|
||
else
|
||
sym.st_other = 0;
|
||
|
||
bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms);
|
||
outbound_syms += bed->s->sizeof_sym;
|
||
}
|
||
|
||
*sttp = stt;
|
||
symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
|
||
symstrtab_hdr->sh_type = SHT_STRTAB;
|
||
|
||
symstrtab_hdr->sh_flags = 0;
|
||
symstrtab_hdr->sh_addr = 0;
|
||
symstrtab_hdr->sh_entsize = 0;
|
||
symstrtab_hdr->sh_link = 0;
|
||
symstrtab_hdr->sh_info = 0;
|
||
symstrtab_hdr->sh_addralign = 1;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Return the number of bytes required to hold the symtab vector.
|
||
|
||
Note that we base it on the count plus 1, since we will null terminate
|
||
the vector allocated based on this size. However, the ELF symbol table
|
||
always has a dummy entry as symbol #0, so it ends up even. */
|
||
|
||
long
|
||
_bfd_elf_get_symtab_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
long symcount;
|
||
long symtab_size;
|
||
Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
|
||
symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
|
||
|
||
return symtab_size;
|
||
}
|
||
|
||
long
|
||
_bfd_elf_get_dynamic_symtab_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
long symcount;
|
||
long symtab_size;
|
||
Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
|
||
|
||
if (elf_dynsymtab (abfd) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
|
||
symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
|
||
|
||
return symtab_size;
|
||
}
|
||
|
||
long
|
||
_bfd_elf_get_reloc_upper_bound (abfd, asect)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
sec_ptr asect;
|
||
{
|
||
return (asect->reloc_count + 1) * sizeof (arelent *);
|
||
}
|
||
|
||
/* Canonicalize the relocs. */
|
||
|
||
long
|
||
_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
|
||
bfd *abfd;
|
||
sec_ptr section;
|
||
arelent **relptr;
|
||
asymbol **symbols;
|
||
{
|
||
arelent *tblptr;
|
||
unsigned int i;
|
||
|
||
if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd,
|
||
section,
|
||
symbols,
|
||
false))
|
||
return -1;
|
||
|
||
tblptr = section->relocation;
|
||
for (i = 0; i < section->reloc_count; i++)
|
||
*relptr++ = tblptr++;
|
||
|
||
*relptr = NULL;
|
||
|
||
return section->reloc_count;
|
||
}
|
||
|
||
long
|
||
_bfd_elf_get_symtab (abfd, alocation)
|
||
bfd *abfd;
|
||
asymbol **alocation;
|
||
{
|
||
long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table
|
||
(abfd, alocation, false);
|
||
|
||
if (symcount >= 0)
|
||
bfd_get_symcount (abfd) = symcount;
|
||
return symcount;
|
||
}
|
||
|
||
long
|
||
_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
|
||
bfd *abfd;
|
||
asymbol **alocation;
|
||
{
|
||
return get_elf_backend_data (abfd)->s->slurp_symbol_table
|
||
(abfd, alocation, true);
|
||
}
|
||
|
||
/* Return the size required for the dynamic reloc entries. Any
|
||
section that was actually installed in the BFD, and has type
|
||
SHT_REL or SHT_RELA, and uses the dynamic symbol table, is
|
||
considered to be a dynamic reloc section. */
|
||
|
||
long
|
||
_bfd_elf_get_dynamic_reloc_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
long ret;
|
||
asection *s;
|
||
|
||
if (elf_dynsymtab (abfd) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
ret = sizeof (arelent *);
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
|
||
&& (elf_section_data (s)->this_hdr.sh_type == SHT_REL
|
||
|| elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
|
||
ret += ((s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize)
|
||
* sizeof (arelent *));
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Canonicalize the dynamic relocation entries. Note that we return
|
||
the dynamic relocations as a single block, although they are
|
||
actually associated with particular sections; the interface, which
|
||
was designed for SunOS style shared libraries, expects that there
|
||
is only one set of dynamic relocs. Any section that was actually
|
||
installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
|
||
the dynamic symbol table, is considered to be a dynamic reloc
|
||
section. */
|
||
|
||
long
|
||
_bfd_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
|
||
bfd *abfd;
|
||
arelent **storage;
|
||
asymbol **syms;
|
||
{
|
||
boolean (*slurp_relocs) PARAMS ((bfd *, asection *, asymbol **, boolean));
|
||
asection *s;
|
||
long ret;
|
||
|
||
if (elf_dynsymtab (abfd) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
|
||
ret = 0;
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
|
||
&& (elf_section_data (s)->this_hdr.sh_type == SHT_REL
|
||
|| elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
|
||
{
|
||
arelent *p;
|
||
long count, i;
|
||
|
||
if (! (*slurp_relocs) (abfd, s, syms, true))
|
||
return -1;
|
||
count = s->_raw_size / elf_section_data (s)->this_hdr.sh_entsize;
|
||
p = s->relocation;
|
||
for (i = 0; i < count; i++)
|
||
*storage++ = p++;
|
||
ret += count;
|
||
}
|
||
}
|
||
|
||
*storage = NULL;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Read in the version information. */
|
||
|
||
boolean
|
||
_bfd_elf_slurp_version_tables (abfd)
|
||
bfd *abfd;
|
||
{
|
||
bfd_byte *contents = NULL;
|
||
|
||
if (elf_dynverdef (abfd) != 0)
|
||
{
|
||
Elf_Internal_Shdr *hdr;
|
||
Elf_External_Verdef *everdef;
|
||
Elf_Internal_Verdef *iverdef;
|
||
unsigned int i;
|
||
|
||
hdr = &elf_tdata (abfd)->dynverdef_hdr;
|
||
|
||
elf_tdata (abfd)->verdef =
|
||
((Elf_Internal_Verdef *)
|
||
bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verdef)));
|
||
if (elf_tdata (abfd)->verdef == NULL)
|
||
goto error_return;
|
||
|
||
elf_tdata (abfd)->cverdefs = hdr->sh_info;
|
||
|
||
contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
|
||
goto error_return;
|
||
|
||
everdef = (Elf_External_Verdef *) contents;
|
||
iverdef = elf_tdata (abfd)->verdef;
|
||
for (i = 0; i < hdr->sh_info; i++, iverdef++)
|
||
{
|
||
Elf_External_Verdaux *everdaux;
|
||
Elf_Internal_Verdaux *iverdaux;
|
||
unsigned int j;
|
||
|
||
_bfd_elf_swap_verdef_in (abfd, everdef, iverdef);
|
||
|
||
iverdef->vd_bfd = abfd;
|
||
|
||
iverdef->vd_auxptr = ((Elf_Internal_Verdaux *)
|
||
bfd_alloc (abfd,
|
||
(iverdef->vd_cnt
|
||
* sizeof (Elf_Internal_Verdaux))));
|
||
if (iverdef->vd_auxptr == NULL)
|
||
goto error_return;
|
||
|
||
everdaux = ((Elf_External_Verdaux *)
|
||
((bfd_byte *) everdef + iverdef->vd_aux));
|
||
iverdaux = iverdef->vd_auxptr;
|
||
for (j = 0; j < iverdef->vd_cnt; j++, iverdaux++)
|
||
{
|
||
_bfd_elf_swap_verdaux_in (abfd, everdaux, iverdaux);
|
||
|
||
iverdaux->vda_nodename =
|
||
bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
|
||
iverdaux->vda_name);
|
||
if (iverdaux->vda_nodename == NULL)
|
||
goto error_return;
|
||
|
||
if (j + 1 < iverdef->vd_cnt)
|
||
iverdaux->vda_nextptr = iverdaux + 1;
|
||
else
|
||
iverdaux->vda_nextptr = NULL;
|
||
|
||
everdaux = ((Elf_External_Verdaux *)
|
||
((bfd_byte *) everdaux + iverdaux->vda_next));
|
||
}
|
||
|
||
iverdef->vd_nodename = iverdef->vd_auxptr->vda_nodename;
|
||
|
||
if (i + 1 < hdr->sh_info)
|
||
iverdef->vd_nextdef = iverdef + 1;
|
||
else
|
||
iverdef->vd_nextdef = NULL;
|
||
|
||
everdef = ((Elf_External_Verdef *)
|
||
((bfd_byte *) everdef + iverdef->vd_next));
|
||
}
|
||
|
||
free (contents);
|
||
contents = NULL;
|
||
}
|
||
|
||
if (elf_dynverref (abfd) != 0)
|
||
{
|
||
Elf_Internal_Shdr *hdr;
|
||
Elf_External_Verneed *everneed;
|
||
Elf_Internal_Verneed *iverneed;
|
||
unsigned int i;
|
||
|
||
hdr = &elf_tdata (abfd)->dynverref_hdr;
|
||
|
||
elf_tdata (abfd)->verref =
|
||
((Elf_Internal_Verneed *)
|
||
bfd_zalloc (abfd, hdr->sh_info * sizeof (Elf_Internal_Verneed)));
|
||
if (elf_tdata (abfd)->verref == NULL)
|
||
goto error_return;
|
||
|
||
elf_tdata (abfd)->cverrefs = hdr->sh_info;
|
||
|
||
contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_read ((PTR) contents, 1, hdr->sh_size, abfd) != hdr->sh_size)
|
||
goto error_return;
|
||
|
||
everneed = (Elf_External_Verneed *) contents;
|
||
iverneed = elf_tdata (abfd)->verref;
|
||
for (i = 0; i < hdr->sh_info; i++, iverneed++)
|
||
{
|
||
Elf_External_Vernaux *evernaux;
|
||
Elf_Internal_Vernaux *ivernaux;
|
||
unsigned int j;
|
||
|
||
_bfd_elf_swap_verneed_in (abfd, everneed, iverneed);
|
||
|
||
iverneed->vn_bfd = abfd;
|
||
|
||
iverneed->vn_filename =
|
||
bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
|
||
iverneed->vn_file);
|
||
if (iverneed->vn_filename == NULL)
|
||
goto error_return;
|
||
|
||
iverneed->vn_auxptr =
|
||
((Elf_Internal_Vernaux *)
|
||
bfd_alloc (abfd,
|
||
iverneed->vn_cnt * sizeof (Elf_Internal_Vernaux)));
|
||
|
||
evernaux = ((Elf_External_Vernaux *)
|
||
((bfd_byte *) everneed + iverneed->vn_aux));
|
||
ivernaux = iverneed->vn_auxptr;
|
||
for (j = 0; j < iverneed->vn_cnt; j++, ivernaux++)
|
||
{
|
||
_bfd_elf_swap_vernaux_in (abfd, evernaux, ivernaux);
|
||
|
||
ivernaux->vna_nodename =
|
||
bfd_elf_string_from_elf_section (abfd, hdr->sh_link,
|
||
ivernaux->vna_name);
|
||
if (ivernaux->vna_nodename == NULL)
|
||
goto error_return;
|
||
|
||
if (j + 1 < iverneed->vn_cnt)
|
||
ivernaux->vna_nextptr = ivernaux + 1;
|
||
else
|
||
ivernaux->vna_nextptr = NULL;
|
||
|
||
evernaux = ((Elf_External_Vernaux *)
|
||
((bfd_byte *) evernaux + ivernaux->vna_next));
|
||
}
|
||
|
||
if (i + 1 < hdr->sh_info)
|
||
iverneed->vn_nextref = iverneed + 1;
|
||
else
|
||
iverneed->vn_nextref = NULL;
|
||
|
||
everneed = ((Elf_External_Verneed *)
|
||
((bfd_byte *) everneed + iverneed->vn_next));
|
||
}
|
||
|
||
free (contents);
|
||
contents = NULL;
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (contents == NULL)
|
||
free (contents);
|
||
return false;
|
||
}
|
||
|
||
asymbol *
|
||
_bfd_elf_make_empty_symbol (abfd)
|
||
bfd *abfd;
|
||
{
|
||
elf_symbol_type *newsym;
|
||
|
||
newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
|
||
if (!newsym)
|
||
return NULL;
|
||
else
|
||
{
|
||
newsym->symbol.the_bfd = abfd;
|
||
return &newsym->symbol;
|
||
}
|
||
}
|
||
|
||
void
|
||
_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
|
||
bfd *ignore_abfd ATTRIBUTE_UNUSED;
|
||
asymbol *symbol;
|
||
symbol_info *ret;
|
||
{
|
||
bfd_symbol_info (symbol, ret);
|
||
}
|
||
|
||
/* Return whether a symbol name implies a local symbol. Most targets
|
||
use this function for the is_local_label_name entry point, but some
|
||
override it. */
|
||
|
||
boolean
|
||
_bfd_elf_is_local_label_name (abfd, name)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
const char *name;
|
||
{
|
||
/* Normal local symbols start with ``.L''. */
|
||
if (name[0] == '.' && name[1] == 'L')
|
||
return true;
|
||
|
||
/* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
|
||
DWARF debugging symbols starting with ``..''. */
|
||
if (name[0] == '.' && name[1] == '.')
|
||
return true;
|
||
|
||
/* gcc will sometimes generate symbols beginning with ``_.L_'' when
|
||
emitting DWARF debugging output. I suspect this is actually a
|
||
small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
|
||
ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
|
||
underscore to be emitted on some ELF targets). For ease of use,
|
||
we treat such symbols as local. */
|
||
if (name[0] == '_' && name[1] == '.' && name[2] == 'L' && name[3] == '_')
|
||
return true;
|
||
|
||
return false;
|
||
}
|
||
|
||
alent *
|
||
_bfd_elf_get_lineno (ignore_abfd, symbol)
|
||
bfd *ignore_abfd ATTRIBUTE_UNUSED;
|
||
asymbol *symbol ATTRIBUTE_UNUSED;
|
||
{
|
||
abort ();
|
||
return NULL;
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_set_arch_mach (abfd, arch, machine)
|
||
bfd *abfd;
|
||
enum bfd_architecture arch;
|
||
unsigned long machine;
|
||
{
|
||
/* If this isn't the right architecture for this backend, and this
|
||
isn't the generic backend, fail. */
|
||
if (arch != get_elf_backend_data (abfd)->arch
|
||
&& arch != bfd_arch_unknown
|
||
&& get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
|
||
return false;
|
||
|
||
return bfd_default_set_arch_mach (abfd, arch, machine);
|
||
}
|
||
|
||
/* Find the nearest line to a particular section and offset, for error
|
||
reporting. */
|
||
|
||
boolean
|
||
_bfd_elf_find_nearest_line (abfd,
|
||
section,
|
||
symbols,
|
||
offset,
|
||
filename_ptr,
|
||
functionname_ptr,
|
||
line_ptr)
|
||
bfd *abfd;
|
||
asection *section;
|
||
asymbol **symbols;
|
||
bfd_vma offset;
|
||
CONST char **filename_ptr;
|
||
CONST char **functionname_ptr;
|
||
unsigned int *line_ptr;
|
||
{
|
||
boolean found;
|
||
const char *filename;
|
||
asymbol *func;
|
||
bfd_vma low_func;
|
||
asymbol **p;
|
||
|
||
if (_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset,
|
||
filename_ptr, functionname_ptr,
|
||
line_ptr))
|
||
return true;
|
||
|
||
if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
|
||
filename_ptr, functionname_ptr,
|
||
line_ptr, 0))
|
||
return true;
|
||
|
||
if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
|
||
&found, filename_ptr,
|
||
functionname_ptr, line_ptr,
|
||
&elf_tdata (abfd)->line_info))
|
||
return false;
|
||
if (found)
|
||
return true;
|
||
|
||
if (symbols == NULL)
|
||
return false;
|
||
|
||
filename = NULL;
|
||
func = NULL;
|
||
low_func = 0;
|
||
|
||
for (p = symbols; *p != NULL; p++)
|
||
{
|
||
elf_symbol_type *q;
|
||
|
||
q = (elf_symbol_type *) *p;
|
||
|
||
if (bfd_get_section (&q->symbol) != section)
|
||
continue;
|
||
|
||
switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
|
||
{
|
||
default:
|
||
break;
|
||
case STT_FILE:
|
||
filename = bfd_asymbol_name (&q->symbol);
|
||
break;
|
||
case STT_NOTYPE:
|
||
case STT_FUNC:
|
||
if (q->symbol.section == section
|
||
&& q->symbol.value >= low_func
|
||
&& q->symbol.value <= offset)
|
||
{
|
||
func = (asymbol *) q;
|
||
low_func = q->symbol.value;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (func == NULL)
|
||
return false;
|
||
|
||
*filename_ptr = filename;
|
||
*functionname_ptr = bfd_asymbol_name (func);
|
||
*line_ptr = 0;
|
||
return true;
|
||
}
|
||
|
||
int
|
||
_bfd_elf_sizeof_headers (abfd, reloc)
|
||
bfd *abfd;
|
||
boolean reloc;
|
||
{
|
||
int ret;
|
||
|
||
ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
|
||
if (! reloc)
|
||
ret += get_program_header_size (abfd);
|
||
return ret;
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_set_section_contents (abfd, section, location, offset, count)
|
||
bfd *abfd;
|
||
sec_ptr section;
|
||
PTR location;
|
||
file_ptr offset;
|
||
bfd_size_type count;
|
||
{
|
||
Elf_Internal_Shdr *hdr;
|
||
|
||
if (! abfd->output_has_begun
|
||
&& ! _bfd_elf_compute_section_file_positions
|
||
(abfd, (struct bfd_link_info *) NULL))
|
||
return false;
|
||
|
||
hdr = &elf_section_data (section)->this_hdr;
|
||
|
||
if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
|
||
return false;
|
||
if (bfd_write (location, 1, count, abfd) != count)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
void
|
||
_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *cache_ptr ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *dst ATTRIBUTE_UNUSED;
|
||
{
|
||
abort ();
|
||
}
|
||
|
||
#if 0
|
||
void
|
||
_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
|
||
bfd *abfd;
|
||
arelent *cache_ptr;
|
||
Elf_Internal_Rel *dst;
|
||
{
|
||
abort ();
|
||
}
|
||
#endif
|
||
|
||
/* Try to convert a non-ELF reloc into an ELF one. */
|
||
|
||
boolean
|
||
_bfd_elf_validate_reloc (abfd, areloc)
|
||
bfd *abfd;
|
||
arelent *areloc;
|
||
{
|
||
/* Check whether we really have an ELF howto. */
|
||
|
||
if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
|
||
{
|
||
bfd_reloc_code_real_type code;
|
||
reloc_howto_type *howto;
|
||
|
||
/* Alien reloc: Try to determine its type to replace it with an
|
||
equivalent ELF reloc. */
|
||
|
||
if (areloc->howto->pc_relative)
|
||
{
|
||
switch (areloc->howto->bitsize)
|
||
{
|
||
case 8:
|
||
code = BFD_RELOC_8_PCREL;
|
||
break;
|
||
case 12:
|
||
code = BFD_RELOC_12_PCREL;
|
||
break;
|
||
case 16:
|
||
code = BFD_RELOC_16_PCREL;
|
||
break;
|
||
case 24:
|
||
code = BFD_RELOC_24_PCREL;
|
||
break;
|
||
case 32:
|
||
code = BFD_RELOC_32_PCREL;
|
||
break;
|
||
case 64:
|
||
code = BFD_RELOC_64_PCREL;
|
||
break;
|
||
default:
|
||
goto fail;
|
||
}
|
||
|
||
howto = bfd_reloc_type_lookup (abfd, code);
|
||
|
||
if (areloc->howto->pcrel_offset != howto->pcrel_offset)
|
||
{
|
||
if (howto->pcrel_offset)
|
||
areloc->addend += areloc->address;
|
||
else
|
||
areloc->addend -= areloc->address; /* addend is unsigned!! */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
switch (areloc->howto->bitsize)
|
||
{
|
||
case 8:
|
||
code = BFD_RELOC_8;
|
||
break;
|
||
case 14:
|
||
code = BFD_RELOC_14;
|
||
break;
|
||
case 16:
|
||
code = BFD_RELOC_16;
|
||
break;
|
||
case 26:
|
||
code = BFD_RELOC_26;
|
||
break;
|
||
case 32:
|
||
code = BFD_RELOC_32;
|
||
break;
|
||
case 64:
|
||
code = BFD_RELOC_64;
|
||
break;
|
||
default:
|
||
goto fail;
|
||
}
|
||
|
||
howto = bfd_reloc_type_lookup (abfd, code);
|
||
}
|
||
|
||
if (howto)
|
||
areloc->howto = howto;
|
||
else
|
||
goto fail;
|
||
}
|
||
|
||
return true;
|
||
|
||
fail:
|
||
(*_bfd_error_handler)
|
||
(_("%s: unsupported relocation type %s"),
|
||
bfd_get_filename (abfd), areloc->howto->name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
boolean
|
||
_bfd_elf_close_and_cleanup (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (bfd_get_format (abfd) == bfd_object)
|
||
{
|
||
if (elf_shstrtab (abfd) != NULL)
|
||
_bfd_stringtab_free (elf_shstrtab (abfd));
|
||
}
|
||
|
||
return _bfd_generic_close_and_cleanup (abfd);
|
||
}
|
||
|
||
/* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
|
||
in the relocation's offset. Thus we cannot allow any sort of sanity
|
||
range-checking to interfere. There is nothing else to do in processing
|
||
this reloc. */
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_elf_rel_vtable_reloc_fn (abfd, re, symbol, data, is, obfd, errmsg)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *re ATTRIBUTE_UNUSED;
|
||
struct symbol_cache_entry *symbol ATTRIBUTE_UNUSED;
|
||
PTR data ATTRIBUTE_UNUSED;
|
||
asection *is ATTRIBUTE_UNUSED;
|
||
bfd *obfd ATTRIBUTE_UNUSED;
|
||
char **errmsg ATTRIBUTE_UNUSED;
|
||
{
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
|
||
/* Elf core file support. Much of this only works on native
|
||
toolchains, since we rely on knowing the
|
||
machine-dependent procfs structure in order to pick
|
||
out details about the corefile. */
|
||
|
||
#ifdef HAVE_SYS_PROCFS_H
|
||
# include <sys/procfs.h>
|
||
#endif
|
||
|
||
|
||
/* Define offsetof for those systems which lack it. */
|
||
|
||
#ifndef offsetof
|
||
# define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
|
||
#endif
|
||
|
||
|
||
/* FIXME: this is kinda wrong, but it's what gdb wants. */
|
||
|
||
static int
|
||
elfcore_make_pid (abfd)
|
||
bfd* abfd;
|
||
{
|
||
return ((elf_tdata (abfd)->core_lwpid << 16)
|
||
+ (elf_tdata (abfd)->core_pid));
|
||
}
|
||
|
||
|
||
/* If there isn't a section called NAME, make one, using
|
||
data from SECT. Note, this function will generate a
|
||
reference to NAME, so you shouldn't deallocate or
|
||
overwrite it. */
|
||
|
||
static boolean
|
||
elfcore_maybe_make_sect (abfd, name, sect)
|
||
bfd* abfd;
|
||
char* name;
|
||
asection* sect;
|
||
{
|
||
asection* sect2;
|
||
|
||
if (bfd_get_section_by_name (abfd, name) != NULL)
|
||
return true;
|
||
|
||
sect2 = bfd_make_section (abfd, name);
|
||
if (sect2 == NULL)
|
||
return false;
|
||
|
||
sect2->_raw_size = sect->_raw_size;
|
||
sect2->filepos = sect->filepos;
|
||
sect2->flags = sect->flags;
|
||
sect2->alignment_power = sect->alignment_power;
|
||
return true;
|
||
}
|
||
|
||
|
||
/* prstatus_t exists on:
|
||
solaris 2.[567]
|
||
linux 2.[01] + glibc
|
||
unixware 4.2
|
||
*/
|
||
|
||
#if defined (HAVE_PRSTATUS_T)
|
||
static boolean
|
||
elfcore_grok_prstatus (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
prstatus_t prstat;
|
||
char buf[100];
|
||
char* name;
|
||
asection* sect;
|
||
|
||
if (note->descsz != sizeof (prstat))
|
||
return true;
|
||
|
||
memcpy (&prstat, note->descdata, sizeof (prstat));
|
||
|
||
elf_tdata (abfd)->core_signal = prstat.pr_cursig;
|
||
elf_tdata (abfd)->core_pid = prstat.pr_pid;
|
||
|
||
/* pr_who exists on:
|
||
solaris 2.[567]
|
||
unixware 4.2
|
||
pr_who doesn't exist on:
|
||
linux 2.[01]
|
||
*/
|
||
#if defined (HAVE_PRSTATUS_T_PR_WHO)
|
||
elf_tdata (abfd)->core_lwpid = prstat.pr_who;
|
||
#endif
|
||
|
||
/* Make a ".reg/999" section. */
|
||
|
||
sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
|
||
name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (name == NULL)
|
||
return false;
|
||
strcpy (name, buf);
|
||
|
||
sect = bfd_make_section (abfd, name);
|
||
if (sect == NULL)
|
||
return false;
|
||
sect->_raw_size = sizeof (prstat.pr_reg);
|
||
sect->filepos = note->descpos + offsetof (prstatus_t, pr_reg);
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
|
||
if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
#endif /* defined (HAVE_PRSTATUS_T) */
|
||
|
||
|
||
/* Create a pseudosection containing the exact contents of NOTE. This
|
||
actually creates up to two pseudosections:
|
||
- For the single-threaded case, a section named NAME, unless
|
||
such a section already exists.
|
||
- For the multi-threaded case, a section named "NAME/PID", where
|
||
PID is elfcore_make_pid (abfd).
|
||
Both pseudosections have identical contents: the contents of NOTE. */
|
||
|
||
static boolean
|
||
elfcore_make_note_pseudosection (abfd, name, note)
|
||
bfd* abfd;
|
||
char *name;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
char buf[100];
|
||
char *threaded_name;
|
||
asection* sect;
|
||
|
||
/* Build the section name. */
|
||
|
||
sprintf (buf, "%s/%d", name, elfcore_make_pid (abfd));
|
||
threaded_name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (threaded_name == NULL)
|
||
return false;
|
||
strcpy (threaded_name, buf);
|
||
|
||
sect = bfd_make_section (abfd, threaded_name);
|
||
if (sect == NULL)
|
||
return false;
|
||
sect->_raw_size = note->descsz;
|
||
sect->filepos = note->descpos;
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
|
||
if (! elfcore_maybe_make_sect (abfd, name, sect))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* There isn't a consistent prfpregset_t across platforms,
|
||
but it doesn't matter, because we don't have to pick this
|
||
data structure apart. */
|
||
static boolean
|
||
elfcore_grok_prfpreg (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
return elfcore_make_note_pseudosection (abfd, ".reg2", note);
|
||
}
|
||
|
||
|
||
/* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
|
||
type of 5 (NT_PRXFPREG). Just include the whole note's contents
|
||
literally. */
|
||
static boolean
|
||
elfcore_grok_prxfpreg (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
return elfcore_make_note_pseudosection (abfd, ".reg-xfp", note);
|
||
}
|
||
|
||
|
||
#if defined (HAVE_PRPSINFO_T)
|
||
# define elfcore_psinfo_t prpsinfo_t
|
||
#endif
|
||
|
||
#if defined (HAVE_PSINFO_T)
|
||
# define elfcore_psinfo_t psinfo_t
|
||
#endif
|
||
|
||
|
||
#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
|
||
|
||
/* return a malloc'ed copy of a string at START which is at
|
||
most MAX bytes long, possibly without a terminating '\0'.
|
||
the copy will always have a terminating '\0'. */
|
||
|
||
static char*
|
||
elfcore_strndup (abfd, start, max)
|
||
bfd* abfd;
|
||
char* start;
|
||
int max;
|
||
{
|
||
char* dup;
|
||
char* end = memchr (start, '\0', max);
|
||
int len;
|
||
|
||
if (end == NULL)
|
||
len = max;
|
||
else
|
||
len = end - start;
|
||
|
||
dup = bfd_alloc (abfd, len + 1);
|
||
if (dup == NULL)
|
||
return NULL;
|
||
|
||
memcpy (dup, start, len);
|
||
dup[len] = '\0';
|
||
|
||
return dup;
|
||
}
|
||
|
||
static boolean
|
||
elfcore_grok_psinfo (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
elfcore_psinfo_t psinfo;
|
||
|
||
if (note->descsz != sizeof (elfcore_psinfo_t))
|
||
return true;
|
||
|
||
memcpy (&psinfo, note->descdata, note->descsz);
|
||
|
||
elf_tdata (abfd)->core_program
|
||
= elfcore_strndup (abfd, psinfo.pr_fname, sizeof (psinfo.pr_fname));
|
||
|
||
elf_tdata (abfd)->core_command
|
||
= elfcore_strndup (abfd, psinfo.pr_psargs, sizeof (psinfo.pr_psargs));
|
||
|
||
/* Note that for some reason, a spurious space is tacked
|
||
onto the end of the args in some (at least one anyway)
|
||
implementations, so strip it off if it exists. */
|
||
|
||
{
|
||
char* command = elf_tdata (abfd)->core_command;
|
||
int n = strlen (command);
|
||
|
||
if (0 < n && command[n - 1] == ' ')
|
||
command[n - 1] = '\0';
|
||
}
|
||
|
||
return true;
|
||
}
|
||
#endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
|
||
|
||
|
||
#if defined (HAVE_PSTATUS_T)
|
||
static boolean
|
||
elfcore_grok_pstatus (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
pstatus_t pstat;
|
||
|
||
if (note->descsz != sizeof (pstat))
|
||
return true;
|
||
|
||
memcpy (&pstat, note->descdata, sizeof (pstat));
|
||
|
||
elf_tdata (abfd)->core_pid = pstat.pr_pid;
|
||
|
||
/* Could grab some more details from the "representative"
|
||
lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
|
||
NT_LWPSTATUS note, presumably. */
|
||
|
||
return true;
|
||
}
|
||
#endif /* defined (HAVE_PSTATUS_T) */
|
||
|
||
|
||
#if defined (HAVE_LWPSTATUS_T)
|
||
static boolean
|
||
elfcore_grok_lwpstatus (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
lwpstatus_t lwpstat;
|
||
char buf[100];
|
||
char* name;
|
||
asection* sect;
|
||
|
||
if (note->descsz != sizeof (lwpstat))
|
||
return true;
|
||
|
||
memcpy (&lwpstat, note->descdata, sizeof (lwpstat));
|
||
|
||
elf_tdata (abfd)->core_lwpid = lwpstat.pr_lwpid;
|
||
elf_tdata (abfd)->core_signal = lwpstat.pr_cursig;
|
||
|
||
/* Make a ".reg/999" section. */
|
||
|
||
sprintf (buf, ".reg/%d", elfcore_make_pid (abfd));
|
||
name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (name == NULL)
|
||
return false;
|
||
strcpy (name, buf);
|
||
|
||
sect = bfd_make_section (abfd, name);
|
||
if (sect == NULL)
|
||
return false;
|
||
|
||
#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
|
||
sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.gregs);
|
||
sect->filepos = note->descpos
|
||
+ offsetof (lwpstatus_t, pr_context.uc_mcontext.gregs);
|
||
#endif
|
||
|
||
#if defined (HAVE_LWPSTATUS_T_PR_REG)
|
||
sect->_raw_size = sizeof (lwpstat.pr_reg);
|
||
sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_reg);
|
||
#endif
|
||
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
|
||
if (!elfcore_maybe_make_sect (abfd, ".reg", sect))
|
||
return false;
|
||
|
||
/* Make a ".reg2/999" section */
|
||
|
||
sprintf (buf, ".reg2/%d", elfcore_make_pid (abfd));
|
||
name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (name == NULL)
|
||
return false;
|
||
strcpy (name, buf);
|
||
|
||
sect = bfd_make_section (abfd, name);
|
||
if (sect == NULL)
|
||
return false;
|
||
|
||
#if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
|
||
sect->_raw_size = sizeof (lwpstat.pr_context.uc_mcontext.fpregs);
|
||
sect->filepos = note->descpos
|
||
+ offsetof (lwpstatus_t, pr_context.uc_mcontext.fpregs);
|
||
#endif
|
||
|
||
#if defined (HAVE_LWPSTATUS_T_PR_FPREG)
|
||
sect->_raw_size = sizeof (lwpstat.pr_fpreg);
|
||
sect->filepos = note->descpos + offsetof (lwpstatus_t, pr_fpreg);
|
||
#endif
|
||
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
|
||
if (!elfcore_maybe_make_sect (abfd, ".reg2", sect))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
#endif /* defined (HAVE_LWPSTATUS_T) */
|
||
|
||
#if defined (HAVE_WIN32_PSTATUS_T)
|
||
static boolean
|
||
elfcore_grok_win32pstatus (abfd, note)
|
||
bfd * abfd;
|
||
Elf_Internal_Note * note;
|
||
{
|
||
char buf[30];
|
||
char * name;
|
||
asection * sect;
|
||
win32_pstatus_t pstatus;
|
||
|
||
if (note->descsz < sizeof (pstatus))
|
||
return true;
|
||
|
||
memcpy (& pstatus, note->descdata, note->descsz);
|
||
|
||
switch (pstatus.data_type)
|
||
{
|
||
case NOTE_INFO_PROCESS:
|
||
/* FIXME: need to add ->core_command. */
|
||
elf_tdata (abfd)->core_signal = pstatus.data.process_info.signal;
|
||
elf_tdata (abfd)->core_pid = pstatus.data.process_info.pid;
|
||
break ;
|
||
|
||
case NOTE_INFO_THREAD:
|
||
/* Make a ".reg/999" section. */
|
||
sprintf (buf, ".reg/%d", pstatus.data.thread_info.tid);
|
||
|
||
name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
strcpy (name, buf);
|
||
|
||
sect = bfd_make_section (abfd, name);
|
||
if (sect == NULL)
|
||
return false;
|
||
|
||
sect->_raw_size = sizeof (pstatus.data.thread_info.thread_context);
|
||
sect->filepos = note->descpos + offsetof (struct win32_pstatus,
|
||
data.thread_info.thread_context);
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
|
||
if (pstatus.data.thread_info.is_active_thread)
|
||
if (! elfcore_maybe_make_sect (abfd, ".reg", sect))
|
||
return false;
|
||
break;
|
||
|
||
case NOTE_INFO_MODULE:
|
||
/* Make a ".module/xxxxxxxx" section. */
|
||
sprintf (buf, ".module/%08x" , pstatus.data.module_info.base_address);
|
||
|
||
name = bfd_alloc (abfd, strlen (buf) + 1);
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
strcpy (name, buf);
|
||
|
||
sect = bfd_make_section (abfd, name);
|
||
|
||
if (sect == NULL)
|
||
return false;
|
||
|
||
sect->_raw_size = note->descsz;
|
||
sect->filepos = note->descpos;
|
||
sect->flags = SEC_HAS_CONTENTS;
|
||
sect->alignment_power = 2;
|
||
break;
|
||
|
||
default:
|
||
return true;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
#endif /* HAVE_WIN32_PSTATUS_T */
|
||
|
||
static boolean
|
||
elfcore_grok_note (abfd, note)
|
||
bfd* abfd;
|
||
Elf_Internal_Note* note;
|
||
{
|
||
switch (note->type)
|
||
{
|
||
default:
|
||
return true;
|
||
|
||
#if defined (HAVE_PRSTATUS_T)
|
||
case NT_PRSTATUS:
|
||
return elfcore_grok_prstatus (abfd, note);
|
||
#endif
|
||
|
||
#if defined (HAVE_PSTATUS_T)
|
||
case NT_PSTATUS:
|
||
return elfcore_grok_pstatus (abfd, note);
|
||
#endif
|
||
|
||
#if defined (HAVE_LWPSTATUS_T)
|
||
case NT_LWPSTATUS:
|
||
return elfcore_grok_lwpstatus (abfd, note);
|
||
#endif
|
||
|
||
case NT_FPREGSET: /* FIXME: rename to NT_PRFPREG */
|
||
return elfcore_grok_prfpreg (abfd, note);
|
||
|
||
#if defined (HAVE_WIN32_PSTATUS_T)
|
||
case NT_WIN32PSTATUS:
|
||
return elfcore_grok_win32pstatus (abfd, note);
|
||
#endif
|
||
|
||
case NT_PRXFPREG: /* Linux SSE extension */
|
||
if (note->namesz == 5
|
||
&& ! strcmp (note->namedata, "LINUX"))
|
||
return elfcore_grok_prxfpreg (abfd, note);
|
||
else
|
||
return true;
|
||
|
||
#if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
|
||
case NT_PRPSINFO:
|
||
case NT_PSINFO:
|
||
return elfcore_grok_psinfo (abfd, note);
|
||
#endif
|
||
}
|
||
}
|
||
|
||
|
||
static boolean
|
||
elfcore_read_notes (abfd, offset, size)
|
||
bfd* abfd;
|
||
bfd_vma offset;
|
||
bfd_vma size;
|
||
{
|
||
char* buf;
|
||
char* p;
|
||
|
||
if (size <= 0)
|
||
return true;
|
||
|
||
if (bfd_seek (abfd, offset, SEEK_SET) == -1)
|
||
return false;
|
||
|
||
buf = bfd_malloc ((size_t) size);
|
||
if (buf == NULL)
|
||
return false;
|
||
|
||
if (bfd_read (buf, size, 1, abfd) != size)
|
||
{
|
||
error:
|
||
free (buf);
|
||
return false;
|
||
}
|
||
|
||
p = buf;
|
||
while (p < buf + size)
|
||
{
|
||
/* FIXME: bad alignment assumption. */
|
||
Elf_External_Note* xnp = (Elf_External_Note*) p;
|
||
Elf_Internal_Note in;
|
||
|
||
in.type = bfd_h_get_32 (abfd, (bfd_byte *) xnp->type);
|
||
|
||
in.namesz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->namesz);
|
||
in.namedata = xnp->name;
|
||
|
||
in.descsz = bfd_h_get_32 (abfd, (bfd_byte *) xnp->descsz);
|
||
in.descdata = in.namedata + BFD_ALIGN (in.namesz, 4);
|
||
in.descpos = offset + (in.descdata - buf);
|
||
|
||
if (! elfcore_grok_note (abfd, &in))
|
||
goto error;
|
||
|
||
p = in.descdata + BFD_ALIGN (in.descsz, 4);
|
||
}
|
||
|
||
free (buf);
|
||
return true;
|
||
}
|
||
|
||
|
||
/* FIXME: This function is now unnecessary. Callers can just call
|
||
bfd_section_from_phdr directly. */
|
||
|
||
boolean
|
||
_bfd_elfcore_section_from_phdr (abfd, phdr, sec_num)
|
||
bfd* abfd;
|
||
Elf_Internal_Phdr* phdr;
|
||
int sec_num;
|
||
{
|
||
if (! bfd_section_from_phdr (abfd, phdr, sec_num))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
|
||
/* Providing external access to the ELF program header table. */
|
||
|
||
/* Return an upper bound on the number of bytes required to store a
|
||
copy of ABFD's program header table entries. Return -1 if an error
|
||
occurs; bfd_get_error will return an appropriate code. */
|
||
long
|
||
bfd_get_elf_phdr_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (abfd->xvec->flavour != bfd_target_elf_flavour)
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return -1;
|
||
}
|
||
|
||
return (elf_elfheader (abfd)->e_phnum
|
||
* sizeof (Elf_Internal_Phdr));
|
||
}
|
||
|
||
|
||
/* Copy ABFD's program header table entries to *PHDRS. The entries
|
||
will be stored as an array of Elf_Internal_Phdr structures, as
|
||
defined in include/elf/internal.h. To find out how large the
|
||
buffer needs to be, call bfd_get_elf_phdr_upper_bound.
|
||
|
||
Return the number of program header table entries read, or -1 if an
|
||
error occurs; bfd_get_error will return an appropriate code. */
|
||
int
|
||
bfd_get_elf_phdrs (abfd, phdrs)
|
||
bfd *abfd;
|
||
void *phdrs;
|
||
{
|
||
int num_phdrs;
|
||
|
||
if (abfd->xvec->flavour != bfd_target_elf_flavour)
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return -1;
|
||
}
|
||
|
||
num_phdrs = elf_elfheader (abfd)->e_phnum;
|
||
memcpy (phdrs, elf_tdata (abfd)->phdr,
|
||
num_phdrs * sizeof (Elf_Internal_Phdr));
|
||
|
||
return num_phdrs;
|
||
}
|