diff options
Diffstat (limited to 'include/grub/macho.h')
| -rw-r--r-- | include/grub/macho.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/grub/macho.h b/include/grub/macho.h new file mode 100644 index 0000000..2dea625 --- /dev/null +++ b/include/grub/macho.h @@ -0,0 +1,166 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef GRUB_MACHO_H +#define GRUB_MACHO_H 1 +#include <grub/types.h> + +/* Multi-architecture header. Always in big-endian. */ +struct grub_macho_fat_header +{ + grub_uint32_t magic; + grub_uint32_t nfat_arch; +} GRUB_PACKED; + +enum + { + GRUB_MACHO_CPUTYPE_IA32 = 0x00000007, + GRUB_MACHO_CPUTYPE_AMD64 = 0x01000007 + }; + +#define GRUB_MACHO_FAT_MAGIC 0xcafebabe +#define GRUB_MACHO_FAT_EFI_MAGIC 0x0ef1fab9U + +typedef grub_uint32_t grub_macho_cpu_type_t; +typedef grub_uint32_t grub_macho_cpu_subtype_t; + +/* Architecture descriptor. Always in big-endian. */ +struct grub_macho_fat_arch +{ + grub_macho_cpu_type_t cputype; + grub_macho_cpu_subtype_t cpusubtype; + grub_uint32_t offset; + grub_uint32_t size; + grub_uint32_t align; +} GRUB_PACKED; + +/* File header for 32-bit. Always in native-endian. */ +struct grub_macho_header32 +{ +#define GRUB_MACHO_MAGIC32 0xfeedface + grub_uint32_t magic; + grub_macho_cpu_type_t cputype; + grub_macho_cpu_subtype_t cpusubtype; + grub_uint32_t filetype; + grub_uint32_t ncmds; + grub_uint32_t sizeofcmds; + grub_uint32_t flags; +} GRUB_PACKED; + +/* File header for 64-bit. Always in native-endian. */ +struct grub_macho_header64 +{ +#define GRUB_MACHO_MAGIC64 0xfeedfacf + grub_uint32_t magic; + grub_macho_cpu_type_t cputype; + grub_macho_cpu_subtype_t cpusubtype; + grub_uint32_t filetype; + grub_uint32_t ncmds; + grub_uint32_t sizeofcmds; + grub_uint32_t flags; + grub_uint32_t reserved; +} GRUB_PACKED; + +/* Common header of Mach-O commands. */ +struct grub_macho_cmd +{ + grub_uint32_t cmd; + grub_uint32_t cmdsize; +} GRUB_PACKED; + +typedef grub_uint32_t grub_macho_vmprot_t; + +/* 32-bit segment command. */ +struct grub_macho_segment32 +{ +#define GRUB_MACHO_CMD_SEGMENT32 1 + grub_uint32_t cmd; + grub_uint32_t cmdsize; + grub_uint8_t segname[16]; + grub_uint32_t vmaddr; + grub_uint32_t vmsize; + grub_uint32_t fileoff; + grub_uint32_t filesize; + grub_macho_vmprot_t maxprot; + grub_macho_vmprot_t initprot; + grub_uint32_t nsects; + grub_uint32_t flags; +} GRUB_PACKED; + +/* 64-bit segment command. */ +struct grub_macho_segment64 +{ +#define GRUB_MACHO_CMD_SEGMENT64 0x19 + grub_uint32_t cmd; + grub_uint32_t cmdsize; + grub_uint8_t segname[16]; + grub_uint64_t vmaddr; + grub_uint64_t vmsize; + grub_uint64_t fileoff; + grub_uint64_t filesize; + grub_macho_vmprot_t maxprot; + grub_macho_vmprot_t initprot; + grub_uint32_t nsects; + grub_uint32_t flags; +} GRUB_PACKED; + +#define GRUB_MACHO_CMD_THREAD 5 + +struct grub_macho_lzss_header +{ + char magic[8]; +#define GRUB_MACHO_LZSS_MAGIC "complzss" + grub_uint32_t unused; + grub_uint32_t uncompressed_size; + grub_uint32_t compressed_size; +}; + +/* Convenience union. What do we need to load to identify the file type. */ +union grub_macho_filestart +{ + struct grub_macho_fat_header fat; + struct grub_macho_header32 thin32; + struct grub_macho_header64 thin64; + struct grub_macho_lzss_header lzss; +} GRUB_PACKED; + +struct grub_macho_thread32 +{ + grub_uint32_t cmd; + grub_uint32_t cmdsize; + grub_uint8_t unknown1[48]; + grub_uint32_t entry_point; + grub_uint8_t unknown2[20]; +} GRUB_PACKED; + +struct grub_macho_thread64 +{ + grub_uint32_t cmd; + grub_uint32_t cmdsize; + grub_uint8_t unknown1[0x88]; + grub_uint64_t entry_point; + grub_uint8_t unknown2[0x20]; +} GRUB_PACKED; + +#define GRUB_MACHO_LZSS_OFFSET 0x180 + +grub_size_t +grub_decompress_lzss (grub_uint8_t *dst, grub_uint8_t *dstend, + grub_uint8_t *src, grub_uint8_t *srcend); + +#endif |