xref: /netbsd-src/external/bsd/elftoolchain/dist/libelf/elf_open.c (revision 5ac3bc719ce6e70593039505b491894133237d12)
1 /*	$NetBSD: elf_open.c,v 1.4 2024/03/03 17:37:33 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 2011 Joseph Koshy
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 
31 #include <libelf.h>
32 
33 #include "_libelf.h"
34 
35 __RCSID("$NetBSD: elf_open.c,v 1.4 2024/03/03 17:37:33 christos Exp $");
36 ELFTC_VCSID("Id: elf_open.c 3977 2022-05-01 06:45:34Z jkoshy");
37 
38 /*
39  * Extension API: open a file for reading, ignoring parse errors.
40  */
41 
42 Elf *
elf_open(int fd)43 elf_open(int fd)
44 {
45 	if (LIBELF_PRIVATE(version) == EV_NONE) {
46 		LIBELF_SET_ERROR(SEQUENCE, 0);
47 		return (NULL);
48 	}
49 
50 	return (_libelf_open_object(fd, ELF_C_READ, 0));
51 }
52 
53 /*
54  * Extension API: create an ELF descriptor for an in-memory object,
55  * ignoring parse errors.
56  */
57 
58 Elf *
elf_openmemory(char * image,size_t sz)59 elf_openmemory(char *image, size_t sz)
60 {
61 	if (LIBELF_PRIVATE(version) == EV_NONE) {
62 		LIBELF_SET_ERROR(SEQUENCE, 0);
63 		return (NULL);
64 	}
65 
66 	if (image == NULL || sz == 0) {
67 		LIBELF_SET_ERROR(ARGUMENT, 0);
68 		return (NULL);
69 	}
70 
71 	return (_libelf_memory((unsigned char *) image, sz, 0));
72 }
73