xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/nextscn.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #include "libelf.h"
31 #include "decl.h"
32 
33 
34 Elf_Scn *
35 elf_nextscn(Elf * elf, Elf_Scn * scn)
36 {
37 	Elf_Scn *	ret_scn = 0;
38 
39 	if (elf == 0)
40 		return (0);
41 	if (scn != 0) {
42 		READLOCKS(elf, scn)
43 		ret_scn = scn->s_next;
44 		READUNLOCKS(elf, scn)
45 	} else {
46 		ELFWLOCK(elf)
47 		if (elf->ed_hdscn == 0) {
48 			if (elf->ed_hdscn == 0)
49 				(void) _elf_cook(elf);
50 		}
51 		if ((scn = elf->ed_hdscn) != 0)
52 			ret_scn = scn->s_next;
53 		ELFUNLOCK(elf)
54 	}
55 	return (ret_scn);
56 }
57