xref: /titanic_41/usr/src/cmd/sgs/libelf/common/nextscn.c (revision 355b4669e025ff377602b6fc7caaf30dbc218371)
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 /*	Copyright (c) 1988 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*
27  * Copyright (c) 1998 by Sun Microsystems, Inc.
28  * All rights reserved.
29  */
30 
31 
32 #pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 1.2	*/
33 
34 #pragma weak	elf_nextscn = _elf_nextscn
35 
36 #include "syn.h"
37 #include "libelf.h"
38 #include "decl.h"
39 
40 
41 Elf_Scn *
42 elf_nextscn(Elf * elf, Elf_Scn * scn)
43 {
44 	Elf_Scn *	ret_scn = 0;
45 
46 	if (elf == 0)
47 		return (0);
48 	if (scn != 0) {
49 		READLOCKS(elf, scn)
50 		ret_scn = scn->s_next;
51 		READUNLOCKS(elf, scn)
52 	} else {
53 		ELFWLOCK(elf)
54 		if (elf->ed_hdscn == 0) {
55 			if (elf->ed_hdscn == 0)
56 				(void) _elf_cook(elf);
57 		}
58 		if ((scn = elf->ed_hdscn) != 0)
59 			ret_scn = scn->s_next;
60 		ELFUNLOCK(elf)
61 	}
62 	return (ret_scn);
63 }
64