xref: /illumos-gate/usr/src/cmd/mdb/tools/common/findscn.c (revision 8b80e8cb6855118d46f605e91b5ed4ce83417395)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <string.h>
30 #include <libelf.h>
31 #include <gelf.h>
32 
33 #include <util.h>
34 
35 int
36 findelfsecidx(Elf *elf, char *tofind)
37 {
38 	Elf_Scn *scn = NULL;
39 	GElf_Ehdr ehdr;
40 	GElf_Shdr shdr;
41 
42 	if (gelf_getehdr(elf, &ehdr) == NULL)
43 		elfdie("failed to get ELF header");
44 
45 	while ((scn = elf_nextscn(elf, scn)) != NULL) {
46 		char *name;
47 
48 		if (gelf_getshdr(scn, &shdr) == NULL ||
49 		    (name = elf_strptr(elf, ehdr.e_shstrndx,
50 		    (size_t)shdr.sh_name)) == NULL)
51 			elfdie("failed to get section header");
52 
53 		if (strcmp(name, tofind) == 0)
54 			return (elf_ndxscn(scn));
55 	}
56 
57 	return (-1);
58 }
59