EXTERNAL_HEADERS/mach-o/fat.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  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 <mach/machine.h>
  45 #include <architecture/byte_order.h>
  46
  47 #define FAT_MAGIC       0xcafebabe
  48 #define FAT_CIGAM       NXSwapLong(FAT_MAGIC)
  49
  50 struct fat_header {
  51         unsigned long   magic;          /* FAT_MAGIC */
  52         unsigned long   nfat_arch;      /* number of structs that follow */
  53 };
  54
  55 struct fat_arch {
  56         cpu_type_t      cputype;        /* cpu specifier (int) */
  57         cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
  58         unsigned long   offset;         /* file offset to this object file */
  59         unsigned long   size;           /* size of this object file */
  60         unsigned long   align;          /* alignment as a power of 2 */
  61 };
  62