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 #include <mach/machine.h> 46 #include <architecture/byte_order.h> 47 48 #define FAT_MAGIC 0xcafebabe 49 #define FAT_CIGAM 0xbebafeca /* NXSwapLong(FAT_MAGIC) */ 50 51 struct fat_header { 52 uint32_t magic; /* FAT_MAGIC or FAT_MAGIC_64 */ 53 uint32_t nfat_arch; /* number of structs that follow */ 54 }; 55 56 struct fat_arch { 57 cpu_type_t cputype; /* cpu specifier (int) */ 58 cpu_subtype_t cpusubtype; /* machine specifier (int) */ 59 uint32_t offset; /* file offset to this object file */ 60 uint32_t size; /* size of this object file */ 61 uint32_t align; /* alignment as a power of 2 */ 62 }; 63 64 /* 65 * The support for the 64-bit fat file format described here is a work in 66 * progress and not yet fully supported in all the Apple Developer Tools. 67 * 68 * When a slice is greater than 4mb or an offset to a slice is greater than 4mb 69 * then the 64-bit fat file format is used. 70 */ 71 #define FAT_MAGIC_64 0xcafebabf 72 #define FAT_CIGAM_64 0xbfbafeca /* NXSwapLong(FAT_MAGIC_64) */ 73 74 struct fat_arch_64 { 75 cpu_type_t cputype; /* cpu specifier (int) */ 76 cpu_subtype_t cpusubtype; /* machine specifier (int) */ 77 uint64_t offset; /* file offset to this object file */ 78 uint64_t size; /* size of this object file */ 79 uint32_t align; /* alignment as a power of 2 */ 80 uint32_t reserved; /* reserved */ 81 }; 82 83 #endif /* _MACH_O_FAT_H_ */