xref: /titanic_52/usr/src/cmd/sgs/libelf/common/next.c (revision c2580b931007758eab8cb5ae8726ebe1588e259b)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 1.5	*/
32 
33 #pragma weak	elf_next = _elf_next
34 
35 
36 #include "syn.h"
37 #include "libelf.h"
38 #include "decl.h"
39 
40 
41 Elf_Cmd
42 elf_next(Elf * elf)
43 {
44 	Elf	*parent;
45 
46 	if (elf == 0)
47 		return (ELF_C_NULL);
48 	ELFRLOCK(elf)
49 	if ((parent = elf->ed_parent) == 0) {
50 		ELFUNLOCK(elf);
51 		return (ELF_C_NULL);
52 	}
53 	ELFWLOCK(parent)
54 	if (elf->ed_siboff >= parent->ed_fsz) {
55 		ELFUNLOCK(parent)
56 		ELFUNLOCK(elf);
57 		return (ELF_C_NULL);
58 	}
59 
60 	parent->ed_nextoff = elf->ed_siboff;
61 	ELFUNLOCK(parent)
62 	ELFUNLOCK(elf);
63 	return (ELF_C_READ);
64 }
65