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112 lines
2.6 KiB
112 lines
2.6 KiB
4 months ago
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/* Update section header.
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Copyright (C) 2000, 2001, 2002, 2010 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gelf.h>
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#include <string.h>
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#include "libelfP.h"
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int
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gelf_update_shdr (Elf_Scn *scn, GElf_Shdr *src)
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{
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int result = 0;
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Elf *elf;
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if (scn == NULL || src == NULL)
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return 0;
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elf = scn->elf;
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rwlock_wrlock (elf->lock);
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if (elf->class == ELFCLASS32)
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{
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Elf32_Shdr *shdr
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= scn->shdr.e32 ?: __elf32_getshdr_wrlock (scn);
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if (shdr == NULL)
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{
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__libelf_seterrno (ELF_E_INVALID_OPERAND);
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goto out;
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}
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if (unlikely (src->sh_flags > 0xffffffffull)
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|| unlikely (src->sh_addr > 0xffffffffull)
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|| unlikely (src->sh_offset > 0xffffffffull)
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|| unlikely (src->sh_size > 0xffffffffull)
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|| unlikely (src->sh_addralign > 0xffffffffull)
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|| unlikely (src->sh_entsize > 0xffffffffull))
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{
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__libelf_seterrno (ELF_E_INVALID_DATA);
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goto out;
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}
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#define COPY(name) \
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shdr->name = src->name
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COPY (sh_name);
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COPY (sh_type);
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COPY (sh_flags);
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COPY (sh_addr);
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COPY (sh_offset);
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COPY (sh_size);
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COPY (sh_link);
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COPY (sh_info);
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COPY (sh_addralign);
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COPY (sh_entsize);
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}
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else
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{
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Elf64_Shdr *shdr
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= scn->shdr.e64 ?: __elf64_getshdr_wrlock (scn);
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if (shdr == NULL)
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{
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__libelf_seterrno (ELF_E_INVALID_OPERAND);
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goto out;
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}
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/* We only have to copy the data. */
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(void) memcpy (shdr, src, sizeof (GElf_Shdr));
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}
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/* Mark the section header as modified. */
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scn->shdr_flags |= ELF_F_DIRTY;
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result = 1;
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out:
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rwlock_unlock (elf->lock);
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return result;
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}
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