xref: /titanic_41/usr/src/cmd/sgs/libelf/common/getshstrndx.c (revision 62b628a68db596a2d75a316dc7ffef658079231f)
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 
44 int
elf_getshdrstrndx(Elf * elf,size_t * shstrndx)45 elf_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 
65 int
elf_getshstrndx(Elf * elf,size_t * shstrndx)66 elf_getshstrndx(Elf *elf, size_t *shstrndx)
67 {
68 	return (elf_getshdrstrndx(elf, shstrndx) == 0);
69 }
70