include/grub/macho.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_MACHO_H
  20 #define GRUB_MACHO_H 1
  21 #include <grub/types.h>
  22
  23 /* Multi-architecture header. Always in big-endian. */
  24 struct grub_macho_fat_header
  25 {
  26   grub_uint32_t magic;
  27   grub_uint32_t nfat_arch;
  28 } __attribute__ ((packed));
  29 #define GRUB_MACHO_FAT_MAGIC 0xcafebabe
  30
  31 typedef grub_uint32_t grub_macho_cpu_type_t;
  32 typedef grub_uint32_t grub_macho_cpu_subtype_t;
  33
  34 /* Architecture descriptor. Always in big-endian. */
  35 struct grub_macho_fat_arch
  36 {
  37   grub_macho_cpu_type_t cputype;
  38   grub_macho_cpu_subtype_t cpusubtype;
  39   grub_uint32_t offset;
  40   grub_uint32_t size;
  41   grub_uint32_t align;
  42 } __attribute__ ((packed));
  43
  44 /* File header for 32-bit. Always in native-endian. */
  45 struct grub_macho_header32
  46 {
  47 #define GRUB_MACHO_MAGIC32 0xfeedface
  48   grub_uint32_t magic;
  49   grub_macho_cpu_type_t cputype;
  50   grub_macho_cpu_subtype_t cpusubtype;
  51   grub_uint32_t filetype;
  52   grub_uint32_t ncmds;
  53   grub_uint32_t sizeofcmds;
  54   grub_uint32_t flags;
  55 } __attribute__ ((packed));
  56
  57 /* File header for 64-bit. Always in native-endian. */
  58 struct grub_macho_header64
  59 {
  60 #define GRUB_MACHO_MAGIC64 0xfeedfacf
  61   grub_uint32_t magic;
  62   grub_macho_cpu_type_t cputype;
  63   grub_macho_cpu_subtype_t cpusubtype;
  64   grub_uint32_t filetype;
  65   grub_uint32_t ncmds;
  66   grub_uint32_t sizeofcmds;
  67   grub_uint32_t flags;
  68   grub_uint32_t reserved;
  69 } __attribute__ ((packed));
  70
  71 /* Convenience union. What do we need to load to identify the file type. */
  72 union grub_macho_filestart
  73 {
  74   struct grub_macho_fat_header fat;
  75   struct grub_macho_header32 thin32;
  76   struct grub_macho_header64 thin64;
  77 } __attribute__ ((packed));
  78
  79 /* Common header of Mach-O commands. */
  80 struct grub_macho_cmd
  81 {
  82   grub_uint32_t cmd;
  83   grub_uint32_t cmdsize;
  84 } __attribute__ ((packed));
  85
  86 typedef grub_uint32_t grub_macho_vmprot_t;
  87
  88 /* 32-bit segment command. */
  89 struct grub_macho_segment32
  90 {
  91 #define GRUB_MACHO_CMD_SEGMENT32  1
  92   grub_uint32_t cmd;
  93   grub_uint32_t cmdsize;
  94   grub_uint8_t segname[16];
  95   grub_uint32_t vmaddr;
  96   grub_uint32_t vmsize;
  97   grub_uint32_t fileoff;
  98   grub_uint32_t filesize;
  99   grub_macho_vmprot_t maxprot;
 100   grub_macho_vmprot_t initprot;
 101   grub_uint32_t nsects;
 102   grub_uint32_t flags;
 103 } __attribute__ ((packed));
 104
 105 #define GRUB_MACHO_CMD_THREAD     5
 106
 107 #endif