apm_partition_table.ksy

apm_partition_table.ksy

meta:
  id: apm_partition_table (bit better wrong)
  title: APM (Apple Partition Map) partition table
  license: CC0-1.0
  endian: be
  encoding: ascii
doc-ref: Specification taken from https://en.wikipedia.org/wiki/Apple_Partition_Map
doc-ref: https://opensource.apple.com/source/pdisk/pdisk-9/dpme.h.auto.html
doc-ref: https://opensource.apple.com/source/IOStorageFamily/IOStorageFamily-92.9/IOApplePartitionScheme.h.auto.html
types:
  ddm:
    seq:
      - id: block_start
        type: u4
      - id: block_size
        type: u2
      - id: system_type
        type: u2
  boot_data:
    seq:
      - id: boot_code_start
        type: u4
        doc: "Boot block start"
      - id: boot_code_size
        type: u4
        doc: "Boot block size"
      - id: boot_code_load_addr
        type: u4
        doc: "Address of bootloader code"
      - id: boot_code_load_addr2
        type: u4
      - id: boot_code_goto_addr
        type: u4
        doc: "Boot code entry point"
      - id: boot_code_goto_addr2
        type: u4
      - id: boot_code_cksum
        type: u4
        doc: "Boot code checksum"
      - id: processor_type
        type: strz
        size: 0x10
      - id: boot_args
        size: 4*32
  block_zero:
    seq:
      - id: magic
        contents: "ER"
      - id: device_blocksize
        type: u2
      - id: device_blockcount
        type: u4
      - id: device_type
        type: u2
      - id: device_id
        type: u2
      - id: driver_data
        type: u4
      - id: driver_count
        type: u2
      - id: driver_table
        type: ddm
        repeat: expr
        repeat-expr: 8
      - id: reserved
        size: 430
  partition_flags:
    seq:
      - id: reserved
        type: b23
      - id: os_specific1
        type: b1
      - id: os_specific2
        type: b1
      - id: os_pic_code
        type: b1
      - id: writable
        type: b1
      - id: readable
        type: b1
      - id: bootable
        type: b1
      - id: in_use
        type: b1
      - id: allocated
        type: b1
      - id: valid
        type: b1
  partition_entry:
    seq:
      - id: magic
        contents: [ 0x50, 0x4d ]
      - id: reserved_1
        size: 0x2
      - id: number_of_partitions
        type: u4
      - id: partition_start
        type: u4
        doc: "First sector"
      - id: partition_size
        type: u4
        doc: "Number of sectors"
      - id: partition_name
        type: strz
        size: 0x20
      - id: partition_type
        type: strz
        size: 0x20  
      - id: lblock_start
        type: u4
        doc: "First sector"
      - id: lblock_size
        type: u4
        doc: "Number of sectors"
      - id: status_flags
        type: partition_flags
      - id: boot
        type: boot_data

      - id: reserved3
        size: 4*62
instances:
  block0:https://opensource.apple.com/source/IOStorageFamily/IOStorageFamily-92.9/IOApplePartitionScheme.h.auto.html
    type: block_zero
    pos: 0x0
  partition_map:
    type: partition_entry
    pos: block0.device_blocksize
  partitions:
    type: partition_entry
    pos: block0.device_blocksize
    repeat: expr
    repeat-expr: partition_map.number_of_partitions