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1 /*
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2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
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3 *
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4 * @APPLE_LICENSE_HEADER_START@
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5 *
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6 * This file contains Original Code and/or Modifications of Original Code
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7 * as defined in and that are subject to the Apple Public Source License
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8 * Version 2.0 (the 'License'). You may not use this file except in
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9 * compliance with the License. Please obtain a copy of the License at
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10 * http://www.opensource.apple.com/apsl/ and read it before using this
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11 * file.
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12 *
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13 * The Original Code and all software distributed under the License are
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14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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18 * Please see the License for the specific language governing rights and
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19 * limitations under the License.
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20 *
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21 * @APPLE_LICENSE_HEADER_END@
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22 */
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23 #ifndef _MACH_O_FAT_H_
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24 #define _MACH_O_FAT_H_
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25 /*
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26 * This header file describes the structures of the file format for "fat"
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27 * architecture specific file (wrapper design). At the begining of the file
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28 * there is one fat_header structure followed by a number of fat_arch
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29 * structures. For each architecture in the file, specified by a pair of
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30 * cputype and cpusubtype, the fat_header describes the file offset, file
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31 * size and alignment in the file of the architecture specific member.
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32 * The padded bytes in the file to place each member on it's specific alignment
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33 * are defined to be read as zeros and can be left as "holes" if the file system
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34 * can support them as long as they read as zeros.
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35 *
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36 * All structures defined here are always written and read to/from disk
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37 * in big-endian order.
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38 */
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39
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40 /*
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41 * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
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42 * and contains the constants for the possible values of these types.
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43 */
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44 #include <stdint.h>
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45 #include <mach/machine.h>
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46 #include <architecture/byte_order.h>
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47
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48 #define FAT_MAGIC 0xcafebabe
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49 #define FAT_CIGAM 0xbebafeca /* NXSwapLong(FAT_MAGIC) */
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50
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51 struct fat_header {
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52 uint32_t magic; /* FAT_MAGIC */
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53 uint32_t nfat_arch; /* number of structs that follow */
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54 };
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55
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56 struct fat_arch {
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57 cpu_type_t cputype; /* cpu specifier (int) */
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58 cpu_subtype_t cpusubtype; /* machine specifier (int) */
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59 uint32_t offset; /* file offset to this object file */
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60 uint32_t size; /* size of this object file */
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61 uint32_t align; /* alignment as a power of 2 */
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62 };
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63
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64 #endif /* _MACH_O_FAT_H_ */
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