xref: /illumos-gate/usr/src/cmd/mdb/tools/common/findscn.c (revision d48be21240dfd051b689384ce2b23479d757f2d8)
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 #include <string.h>
28 #include <libelf.h>
29 #include <gelf.h>
30 
31 #include <util.h>
32 
33 int
34 findelfsecidx(Elf *elf, char *tofind)
35 {
36 	Elf_Scn *scn = NULL;
37 	GElf_Ehdr ehdr;
38 	GElf_Shdr shdr;
39 
40 	if (gelf_getehdr(elf, &ehdr) == NULL)
41 		elfdie("failed to get ELF header");
42 
43 	while ((scn = elf_nextscn(elf, scn)) != NULL) {
44 		char *name;
45 
46 		if (gelf_getshdr(scn, &shdr) == NULL ||
47 		    (name = elf_strptr(elf, ehdr.e_shstrndx,
48 		    (size_t)shdr.sh_name)) == NULL)
49 			elfdie("failed to get section header");
50 
51 		if (strcmp(name, tofind) == 0)
52 			return (elf_ndxscn(scn));
53 	}
54 
55 	return (-1);
56 }
57