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Annotation of XNU/EXTERNAL_HEADERS/mach-o/fat.h, revision 1.1.1.1

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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