xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/next.c (revision 2a8bcb4e)
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_Cmd
elf_next(Elf * elf)35 elf_next(Elf * elf)
36 {
37 	Elf	*parent;
38 
39 	if (elf == 0)
40 		return (ELF_C_NULL);
41 	ELFRLOCK(elf)
42 	if ((parent = elf->ed_parent) == 0) {
43 		ELFUNLOCK(elf);
44 		return (ELF_C_NULL);
45 	}
46 	ELFWLOCK(parent)
47 	if (elf->ed_siboff >= parent->ed_fsz) {
48 		ELFUNLOCK(parent)
49 		ELFUNLOCK(elf);
50 		return (ELF_C_NULL);
51 	}
52 
53 	parent->ed_nextoff = elf->ed_siboff;
54 	ELFUNLOCK(parent)
55 	ELFUNLOCK(elf);
56 	return (ELF_C_READ);
57 }
58