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  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * This header file describes the structures of the file format for "fat"
  25  * architecture specific file (wrapper design).  At the begining of the file
  26  * there is one fat_header structure followed by a number of fat_arch
  27  * structures.  For each architecture in the file, specified by a pair of
  28  * cputype and cpusubtype, the fat_header describes the file offset, file
  29  * size and alignment in the file of the architecture specific member.
  30  * The padded bytes in the file to place each member on it's specific alignment
  31  * are defined to be read as zeros and can be left as "holes" if the file system
  32  * can support them as long as they read as zeros.
  33  *
  34  * All structures defined here are always written and read to/from disk
  35  * in big-endian order.
  36  */
  37
  38 /*
  39  * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
  40  * and contains the constants for the possible values of these types.
  41  */
  42 #include <mach/machine.h>
  43 #include <architecture/byte_order.h>
  44
  45 #define FAT_MAGIC       0xcafebabe
  46 #define FAT_CIGAM       NXSwapLong(FAT_MAGIC)
  47
  48 struct fat_header {
  49         unsigned long   magic;          /* FAT_MAGIC */
  50         unsigned long   nfat_arch;      /* number of structs that follow */
  51 };
  52
  53 struct fat_arch {
  54         cpu_type_t      cputype;        /* cpu specifier (int) */
  55         cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
  56         unsigned long   offset;         /* file offset to this object file */
  57         unsigned long   size;           /* size of this object file */
  58         unsigned long   align;          /* alignment as a power of 2 */
  59 };
  60
  61 #ifdef KERNEL
  62
  63 #include <mach/mach_types.h>
  64
  65 struct vnode;
  66
  67 /* XXX return type should be load_return_t, but mach_loader.h is not in scope */
  68 int fatfile_getarch_affinity(struct vnode *vp, vm_offset_t data_ptr,
  69                 struct fat_arch *archret, int affinity);
  70 int fatfile_getarch(struct vnode *vp, vm_offset_t data_ptr,
  71                 struct fat_arch *archret);
  72 int fatfile_getarch_with_bits(struct vnode *vp, integer_t archbits,
  73                 vm_offset_t data_ptr, struct fat_arch *archret);
  74
  75 #endif  /* KERNEL */