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  * 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 #include <mach/machine.h>
  42 #include <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
  60 #ifdef KERNEL
  61
  62 #include <mach/mach_types.h>
  63
  64 struct vnode;
  65
  66 /* XXX return type should be load_return_t, but mach_loader.h is not in scope */
  67 int fatfile_getarch_affinity(struct vnode *vp, vm_offset_t data_ptr,
  68                 struct fat_arch *archret, int affinity);
  69 int fatfile_getarch(struct vnode *vp, vm_offset_t data_ptr,
  70                 struct fat_arch *archret);
  71 int fatfile_getarch_with_bits(struct vnode *vp, integer_t archbits,
  72                 vm_offset_t data_ptr, struct fat_arch *archret);
  73
  74 #endif  /* KERNEL */