xref: /illumos-gate/usr/src/cmd/sgs/libelf/common/rawfile.c (revision 4eaa471005973e11a6110b69fe990530b3b95a38)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #include "libelf.h"
33 #include "decl.h"
34 
35 
36 char *
37 elf_rawfile(Elf *elf, size_t *ptr)
38 {
39 	register size_t	sz;
40 	char		*p = 0;
41 
42 	if (elf == 0) {
43 		if (ptr != 0)
44 			*ptr = 0;
45 		return (0);
46 	}
47 
48 	ELFWLOCK(elf)
49 	if ((sz = elf->ed_fsz) == 0) {
50 		if (ptr != 0)
51 			*ptr = 0;
52 		ELFUNLOCK(elf)
53 		return (0);
54 	}
55 
56 	if (elf->ed_raw != 0)
57 		p = elf->ed_raw;
58 	else if (elf->ed_status == ES_COOKED) {
59 		if ((p = _elf_read(elf->ed_fd, elf->ed_baseoff, sz)) != 0) {
60 			elf->ed_raw = p;
61 			elf->ed_myflags |= EDF_RAWALLOC;
62 		} else
63 			sz = 0;
64 	} else {
65 		p = elf->ed_raw = elf->ed_ident;
66 		elf->ed_status = ES_FROZEN;
67 		if (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES) {
68 			p = 0;
69 			sz = 0;
70 		}
71 	}
72 	if (ptr != 0)
73 		*ptr = sz;
74 	ELFUNLOCK(elf)
75 	return (p);
76 }
77