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/* Get symbol version information at the given index.
Copyright (C) 1999, 2000, 2001, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 1999.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 2.
This program 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 a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <gelf.h>
#include <string.h>
#include "libelfP.h"
GElf_Versym *
gelf_getversym (data, ndx, dst)
Elf_Data *data;
int ndx;
GElf_Versym *dst;
{
Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
Elf_Scn *scn;
GElf_Versym *result;
if (data == NULL)
return NULL;
if (unlikely (data->d_type != ELF_T_HALF))
{
__libelf_seterrno (ELF_E_INVALID_HANDLE);
return NULL;
}
/* This is the one place where we have to take advantage of the fact
that an `Elf_Data' pointer is also a pointer to `Elf_Data_Scn'.
The interface is broken so that it requires this hack. */
scn = data_scn->s;
/* It's easy to handle this type. It has the same size for 32 and
64 bit objects. */
assert (sizeof (GElf_Versym) == sizeof (Elf32_Versym));
assert (sizeof (GElf_Versym) == sizeof (Elf64_Versym));
rwlock_rdlock (scn->elf->lock);
/* The data is already in the correct form. Just make sure the
index is OK. */
if (unlikely ((ndx + 1) * sizeof (GElf_Versym) > data->d_size))
{
__libelf_seterrno (ELF_E_INVALID_INDEX);
result = NULL;
}
else
{
*dst = ((GElf_Versym *) data->d_buf)[ndx];
result = dst;
}
rwlock_unlock (scn->elf->lock);
return result;
}
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