getshstrndx.c revision 9900:1b86d65a4f9e 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#include <string.h>
27#include <gelf.h>
28#include <decl.h>
29#include <msg.h>
30
31/*
32 * Return section header array string table index, taking
33 * extended headers into account.
34 *
35 * elf_getshstrndx() returns 0 for failure, and 1 for success.
36 *
37 * elf_getshdrstrndx() supercedes elf_getshstrndx(), which is now considered
38 * obsolete. It returns -1 for failure and 0 for success, bringing us into
39 * alignment with the interface agreed to in the 2002 gABI meeting.
40 *
41 * See the comment in getshnum.c for additional information.
42 */
43
44int
45elf_getshdrstrndx(Elf *elf, size_t *shstrndx)
46{
47	GElf_Ehdr	ehdr;
48	Elf_Scn		*scn;
49	GElf_Shdr	shdr0;
50
51	if (gelf_getehdr(elf, &ehdr) == 0)
52		return (-1);
53	if (ehdr.e_shstrndx != SHN_XINDEX) {
54		*shstrndx = ehdr.e_shstrndx;
55		return (0);
56	}
57	if ((scn = elf_getscn(elf, 0)) == 0)
58		return (-1);
59	if (gelf_getshdr(scn, &shdr0) == 0)
60		return (-1);
61	*shstrndx = shdr0.sh_link;
62	return (0);
63}
64
65int
66elf_getshstrndx(Elf *elf, size_t *shstrndx)
67{
68	return (elf_getshdrstrndx(elf, shstrndx) == 0);
69}
70