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_ */