xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/rawfile.c (revision 0fb96ba1f1ce26ff8b286f8f928769a6afcb00a6)
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 char *
35 elf_rawfile(Elf *elf, size_t *ptr)
36 {
37 	register size_t	sz;
38 	char		*p = 0;
39 
40 	if (elf == 0) {
41 		if (ptr != 0)
42 			*ptr = 0;
43 		return (0);
44 	}
45 
46 	ELFWLOCK(elf)
47 	if ((sz = elf->ed_fsz) == 0) {
48 		if (ptr != 0)
49 			*ptr = 0;
50 		ELFUNLOCK(elf)
51 		return (0);
52 	}
53 
54 	if (elf->ed_raw != 0)
55 		p = elf->ed_raw;
56 	else if (elf->ed_status == ES_COOKED) {
57 		if ((p = _elf_read(elf->ed_fd, elf->ed_baseoff, sz)) != 0) {
58 			elf->ed_raw = p;
59 			elf->ed_myflags |= EDF_RAWALLOC;
60 		} else
61 			sz = 0;
62 	} else {
63 		p = elf->ed_raw = elf->ed_ident;
64 		elf->ed_status = ES_FROZEN;
65 		if (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES) {
66 			p = 0;
67 			sz = 0;
68 		}
69 	}
70 	if (ptr != 0)
71 		*ptr = sz;
72 	ELFUNLOCK(elf)
73 	return (p);
74 }
75