1/*
2 * Copyright (c) 2016 Apple, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23#ifndef _MACH_O_FAT_H_
24#define _MACH_O_FAT_H_
25/*
26 * This header file describes the structures of the file format for "fat"
27 * architecture specific file (wrapper design). At the begining of the file
28 * there is one fat_header structure followed by a number of fat_arch
29 * structures. For each architecture in the file, specified by a pair of
30 * cputype and cpusubtype, the fat_header describes the file offset, file
31 * size and alignment in the file of the architecture specific member.
32 * The padded bytes in the file to place each member on it's specific alignment
33 * are defined to be read as zeros and can be left as "holes" if the file system
34 * can support them as long as they read as zeros.
35 *
36 * All structures defined here are always written and read to/from disk
37 * in big-endian order.
38 */
39
40/*
41 * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
42 * and contains the constants for the possible values of these types.
43 */
44#include <stdint.h>
45
46#if __has_include(<mach/machine.h>)
47#include <mach/machine.h>
48#endif
49
50#if __has_include(<architecture/byte_order.h>)
51#include <architecture/byte_order.h>
52#endif
53
54#define FAT_MAGIC 0xcafebabe
55#define FAT_CIGAM 0xbebafeca /* NXSwapLong(FAT_MAGIC) */
56
57struct fat_header {
58 uint32_t magic; /* FAT_MAGIC or FAT_MAGIC_64 */
59 uint32_t nfat_arch; /* number of structs that follow */
60};
61
62struct fat_arch {
63 int32_t cputype; /* cpu specifier (int) */
64 int32_t cpusubtype; /* machine specifier (int) */
65 uint32_t offset; /* file offset to this object file */
66 uint32_t size; /* size of this object file */
67 uint32_t align; /* alignment as a power of 2 */
68};
69
70/*
71 * The support for the 64-bit fat file format described here is a work in
72 * progress and not yet fully supported in all the Apple Developer Tools.
73 *
74 * When a slice is greater than 4mb or an offset to a slice is greater than 4mb
75 * then the 64-bit fat file format is used.
76 */
77#define FAT_MAGIC_64 0xcafebabf
78#define FAT_CIGAM_64 0xbfbafeca /* NXSwapLong(FAT_MAGIC_64) */
79
80struct fat_arch_64 {
81 int32_t cputype; /* cpu specifier (int) */
82 int32_t cpusubtype; /* machine specifier (int) */
83 uint64_t offset; /* file offset to this object file */
84 uint64_t size; /* size of this object file */
85 uint32_t align; /* alignment as a power of 2 */
86 uint32_t reserved; /* reserved */
87};
88
89#endif /* _MACH_O_FAT_H_ */