FreeBSD/Linux Kernel Cross Reference
sys/EXTERNAL_HEADERS/mach-o/fat.h

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * This header file describes the structures of the file format for "fat"
     * architecture specific file (wrapper design).  At the begining of the file
     * there is one fat_header structure followed by a number of fat_arch
     * structures.  For each architecture in the file, specified by a pair of
     * cputype and cpusubtype, the fat_header describes the file offset, file
     * size and alignment in the file of the architecture specific member.
     * The padded bytes in the file to place each member on it's specific alignment
     * are defined to be read as zeros and can be left as "holes" if the file system
     * can support them as long as they read as zeros.
     *
     * All structures defined here are always written and read to/from disk
     * in big-endian order.
     */
    
    /*
     * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
     * and contains the constants for the possible values of these types.
     */
    #include <mach/machine.h>
    #include <architecture/byte_order.h>
    
    #define FAT_MAGIC       0xcafebabe
    #define FAT_CIGAM       NXSwapLong(FAT_MAGIC)
    
    struct fat_header {
            unsigned long   magic;          /* FAT_MAGIC */
            unsigned long   nfat_arch;      /* number of structs that follow */
    };
    
    struct fat_arch {
            cpu_type_t      cputype;        /* cpu specifier (int) */
            cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
            unsigned long   offset;         /* file offset to this object file */
            unsigned long   size;           /* size of this object file */
            unsigned long   align;          /* alignment as a power of 2 */
    };
    

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