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Annotation of XNU/EXTERNAL_HEADERS/mach-o/fat.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * This header file describes the structures of the file format for "fat"
        !            24:  * architecture specific file (wrapper design).  At the begining of the file
        !            25:  * there is one fat_header structure followed by a number of fat_arch
        !            26:  * structures.  For each architecture in the file, specified by a pair of
        !            27:  * cputype and cpusubtype, the fat_header describes the file offset, file
        !            28:  * size and alignment in the file of the architecture specific member.
        !            29:  * The padded bytes in the file to place each member on it's specific alignment
        !            30:  * are defined to be read as zeros and can be left as "holes" if the file system
        !            31:  * can support them as long as they read as zeros.
        !            32:  *
        !            33:  * All structures defined here are always written and read to/from disk
        !            34:  * in big-endian order.
        !            35:  */
        !            36: 
        !            37: /*
        !            38:  * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
        !            39:  * and contains the constants for the possible values of these types.
        !            40:  */
        !            41: #import <mach/machine.h>
        !            42: #import <architecture/byte_order.h>
        !            43: 
        !            44: #define FAT_MAGIC      0xcafebabe
        !            45: #define FAT_CIGAM      NXSwapLong(FAT_MAGIC)
        !            46: 
        !            47: struct fat_header {
        !            48:        unsigned long   magic;          /* FAT_MAGIC */
        !            49:        unsigned long   nfat_arch;      /* number of structs that follow */
        !            50: };
        !            51: 
        !            52: struct fat_arch {
        !            53:        cpu_type_t      cputype;        /* cpu specifier (int) */
        !            54:        cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
        !            55:        unsigned long   offset;         /* file offset to this object file */
        !            56:        unsigned long   size;           /* size of this object file */
        !            57:        unsigned long   align;          /* alignment as a power of 2 */
        !            58: };
        !            59: 

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