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/* Get required symbol version information at the given offset.
Copyright (C) 1999, 2000, 2001, 2002 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 1999.
This file is free software; you can redistribute it and/or modify
it under the terms of either
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at
your option) any later version
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at
your option) any later version
or both in parallel, as here.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <gelf.h>
#include <string.h>
#include "libelfP.h"
GElf_Verneed *
gelf_getverneed (data, offset, dst)
Elf_Data *data;
int offset;
GElf_Verneed *dst;
{
GElf_Verneed *result;
if (data == NULL)
return NULL;
if (unlikely (data->d_type != ELF_T_VNEED))
{
__libelf_seterrno (ELF_E_INVALID_HANDLE);
return NULL;
}
/* It's easy to handle this type. It has the same size for 32 and
64 bit objects. And fortunately the `ElfXXX_Vernaux' records
also have the same size. */
assert (sizeof (GElf_Verneed) == sizeof (Elf32_Verneed));
assert (sizeof (GElf_Verneed) == sizeof (Elf64_Verneed));
assert (sizeof (GElf_Verneed) == sizeof (Elf32_Vernaux));
assert (sizeof (GElf_Verneed) == sizeof (Elf64_Vernaux));
rwlock_rdlock (((Elf_Data_Scn *) data)->s->elf->lock);
/* The data is already in the correct form. Just make sure the
index is OK. */
if (unlikely (offset < 0)
|| unlikely (offset + sizeof (GElf_Verneed) > data->d_size)
|| unlikely (offset % sizeof (GElf_Verneed) != 0))
{
__libelf_seterrno (ELF_E_OFFSET_RANGE);
result = NULL;
}
else
result = (GElf_Verneed *) memcpy (dst, (char *) data->d_buf + offset,
sizeof (GElf_Verneed));
rwlock_unlock (((Elf_Data_Scn *) data)->s->elf->lock);
return result;
}
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