1 /*
2 * Copyright (c) Christos Zoulas 2008.
3 * All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice immediately at the beginning of the file, without modification,
10 * this list of conditions, and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27 if (nbytes <= sizeof(elfhdr))
28 return 0;
29
30 u.l = 1;
31 (void)memcpy(&elfhdr, buf, sizeof elfhdr);
32 swap = (u.c[sizeof(int32_t) - 1] + 1) != elfhdr.e_ident[EI_DATA];
33
34 type = elf_getu16(swap, elfhdr.e_type);
35 switch (type) {
36 #ifdef ELFCORE
37 case ET_CORE:
38 flags |= FLAGS_IS_CORE;
39 if (dophn_core(ms, clazz, swap, fd,
40 (off_t)elf_getu(swap, elfhdr.e_phoff),
41 elf_getu16(swap, elfhdr.e_phnum),
42 (size_t)elf_getu16(swap, elfhdr.e_phentsize),
43 fsize, &flags) == -1)
44 return -1;
45 break;
46 #endif
47 case ET_EXEC:
48 case ET_DYN:
49 if (dophn_exec(ms, clazz, swap, fd,
50 (off_t)elf_getu(swap, elfhdr.e_phoff),
51 elf_getu16(swap, elfhdr.e_phnum),
52 (size_t)elf_getu16(swap, elfhdr.e_phentsize),
53 fsize, &flags, elf_getu16(swap, elfhdr.e_shnum))
54 == -1)
55 return -1;
56 /*FALLTHROUGH*/
57 case ET_REL:
58 if (doshn(ms, clazz, swap, fd,
59 (off_t)elf_getu(swap, elfhdr.e_shoff),
60 elf_getu16(swap, elfhdr.e_shnum),
61 (size_t)elf_getu16(swap, elfhdr.e_shentsize),
62 fsize, &flags, elf_getu16(swap, elfhdr.e_machine),
63 (int)elf_getu16(swap, elfhdr.e_shstrndx)) == -1)
64 return -1;
65 break;
66
67 default:
68 break;
69 }
70 return 1;