# $File: gpt,v 1.5 2020/12/12 20:01:47 christos Exp $

#------------------------------------------------------------------------------
# $File: gpt,v 1.5 2020/12/12 20:01:47 christos Exp $
#
# GPT Partition table patterns.
# Author: Rogier Goossens ([email protected])
# Note that a GPT-formatted disk must contain an MBR as well.
#

# The initial segment (up to >>>>>>>>422) was copied from the X86
# partition table code (aka MBR).
# This is kept separate, so that MBR partitions are not reported as well.
# (use -k if you do want them as well)

# First, detect the MBR partition table
# If more than one GPT protective MBR partition exists, don't print anything
# (the other MBR detection code will then just print the MBR partition table)
0x1FE leshort 0xAA55
>3 string !MS
>>3 string !SYSLINUX
>>>3 string !MTOOL
>>>>3 string !NEWLDR
>>>>>5 string !DOS
# not FAT (32 bit)
>>>>>>82 string !FAT32
#not Linux kernel
>>>>>>>514 string !HdrS
#not BeOS
>>>>>>>>422 string !Be\ Boot\ Loader
# GPT with protective MBR entry in partition 1 (only)
>>>>>>>>>450 ubyte 0xee
>>>>>>>>>>466 ubyte !0xee
>>>>>>>>>>>482 ubyte !0xee
>>>>>>>>>>>>498 ubyte !0xee
#>>>>>>>>>>>>>446 use gpt-mbr-partition
>>>>>>>>>>>>>(454.l*8192) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>0 ubyte x of 8192 bytes
>>>>>>>>>>>>>(454.l*8192) string !EFI\ PART
>>>>>>>>>>>>>>(454.l*4096) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>0 ubyte x of 4096 bytes
>>>>>>>>>>>>>>(454.l*4096) string !EFI\ PART
>>>>>>>>>>>>>>>(454.l*2048) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>0 ubyte x of 2048 bytes
>>>>>>>>>>>>>>>(454.l*2048) string !EFI\ PART
>>>>>>>>>>>>>>>>(454.l*1024) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>0 ubyte x of 1024 bytes
>>>>>>>>>>>>>>>>(454.l*1024) string !EFI\ PART
>>>>>>>>>>>>>>>>>(454.l*512) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>>0 ubyte x of 512 bytes
# GPT with protective MBR entry in partition 2 (only)
>>>>>>>>>450 ubyte !0xee
>>>>>>>>>>466 ubyte 0xee
>>>>>>>>>>>482 ubyte !0xee
>>>>>>>>>>>>498 ubyte !0xee
#>>>>>>>>>>>>>462 use gpt-mbr-partition
>>>>>>>>>>>>>(470.l*8192) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>0 ubyte x of 8192 bytes
>>>>>>>>>>>>>(470.l*8192) string !EFI\ PART
>>>>>>>>>>>>>>(470.l*4096) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>0 ubyte x of 4096 bytes
>>>>>>>>>>>>>>(470.l*4096) string !EFI\ PART
>>>>>>>>>>>>>>>(470.l*2048) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>0 ubyte x of 2048 bytes
>>>>>>>>>>>>>>>(470.l*2048) string !EFI\ PART
>>>>>>>>>>>>>>>>(470.l*1024) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>0 ubyte x of 1024 bytes
>>>>>>>>>>>>>>>>(470.l*1024) string !EFI\ PART
>>>>>>>>>>>>>>>>>(470.l*512) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>>0 ubyte x of 512 bytes
# GPT with protective MBR entry in partition 3 (only)
>>>>>>>>>450 ubyte !0xee
>>>>>>>>>>466 ubyte !0xee
>>>>>>>>>>>482 ubyte 0xee
>>>>>>>>>>>>498 ubyte !0xee
#>>>>>>>>>>>>>478 use gpt-mbr-partition
>>>>>>>>>>>>>(486.l*8192) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>0 ubyte x of 8192 bytes
>>>>>>>>>>>>>(486.l*8192) string !EFI\ PART
>>>>>>>>>>>>>>(486.l*4096) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>0 ubyte x of 4096 bytes
>>>>>>>>>>>>>>(486.l*4096) string !EFI\ PART
>>>>>>>>>>>>>>>(486.l*2048) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>0 ubyte x of 2048 bytes
>>>>>>>>>>>>>>>(486.l*2048) string !EFI\ PART
>>>>>>>>>>>>>>>>(486.l*1024) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>0 ubyte x of 1024 bytes
>>>>>>>>>>>>>>>>(486.l*1024) string !EFI\ PART
>>>>>>>>>>>>>>>>>(486.l*512) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>>0 ubyte x of 512 bytes
# GPT with protective MBR entry in partition 4 (only)
>>>>>>>>>450 ubyte !0xee
>>>>>>>>>>466 ubyte !0xee
>>>>>>>>>>>482 ubyte !0xee
>>>>>>>>>>>>498 ubyte 0xee
#>>>>>>>>>>>>>494 use gpt-mbr-partition
>>>>>>>>>>>>>(502.l*8192) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>0 ubyte x of 8192 bytes
>>>>>>>>>>>>>(502.l*8192) string !EFI\ PART
>>>>>>>>>>>>>>(502.l*4096) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>0 ubyte x of 4096 bytes
>>>>>>>>>>>>>>(502.l*4096) string !EFI\ PART
>>>>>>>>>>>>>>>(502.l*2048) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>0 ubyte x of 2048 bytes
>>>>>>>>>>>>>>>(502.l*2048) string !EFI\ PART
>>>>>>>>>>>>>>>>(502.l*1024) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>0 ubyte x of 1024 bytes
>>>>>>>>>>>>>>>>(502.l*1024) string !EFI\ PART
>>>>>>>>>>>>>>>>>(502.l*512) string EFI\ PART GPT partition table
>>>>>>>>>>>>>>>>>>0 use gpt-mbr-type
>>>>>>>>>>>>>>>>>>&-8 use gpt-table
>>>>>>>>>>>>>>>>>>0 ubyte x of 512 bytes

# The following code does GPT detection and processing, including
# sector size detection.
# It has to be duplicated above because the top-level pattern
# (i.e. not called using 'use') must print *something* for file
# to count it as a match. Text only printed in named patterns is
# not counted, and causes file to continue, and try and match
# other patterns.
#
# Unfortunately, when assuming sector sizes >=16k, if the sector size
# happens to be 512 instead, we may find confusing data after the GPT
# table... If the GPT table has less than 128 entries, this may even
# happen for assumed sector sizes as small as 4k
# This could be solved by checking for the presence of the backup GPT
# header as well, but that makes the logic extremely complex
##0 name gpt-mbr-partition
##>(8.l*8192) string EFI\ PART
##>>(8.l*8192) use gpt-mbr-type
##>>&-8 use gpt-table
##>>0 ubyte x of 8192 bytes
##>(8.l*8192) string !EFI\ PART
##>>(8.l*4096) string EFI\ PART GPT partition table
##>>>0 use gpt-mbr-type
##>>>&-8 use gpt-table
##>>>0 ubyte x of 4096 bytes
##>>(8.l*4096) string !EFI\ PART
##>>>(8.l*2048) string EFI\ PART GPT partition table
##>>>>0 use gpt-mbr-type
##>>>>&-8 use gpt-table
##>>>>0 ubyte x of 2048 bytes
##>>>(8.l*2048) string !EFI\ PART
##>>>>(8.l*1024) string EFI\ PART GPT partition table
##>>>>>0 use gpt-mbr-type
##>>>>>&-8 use gpt-table
##>>>>>0 ubyte x of 1024 bytes
##>>>>(8.l*1024) string !EFI\ PART
##>>>>>(8.l*512) string EFI\ PART GPT partition table
##>>>>>>0 use gpt-mbr-type
##>>>>>>&-8 use gpt-table
##>>>>>>0 ubyte x of 512 bytes

# Print details of MBR type for a GPT-disk
# Calling code ensures that there is only one 0xee partition.
0 name gpt-mbr-type
# GPT with protective MBR entry in partition 1
>450 ubyte 0xee
>>454 ulelong 1
>>>462 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>454 ulelong !1 \b (nonstandard: not at LBA 1)
# GPT with protective MBR entry in partition 2
>466 ubyte 0xee
>>470 ulelong 1
>>>478 string \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0
>>>>446 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>>478 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>470 ulelong !1 \b (nonstandard: not at LBA 1)
# GPT with protective MBR entry in partition 3
>482 ubyte 0xee
>>486 ulelong 1
>>>494 string \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0
>>>>446 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>>494 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>486 ulelong !1 \b (nonstandard: not at LBA 1)
# GPT with protective MBR entry in partition 4
>498 ubyte 0xee
>>502 ulelong 1
>>>446 string !\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \b (with hybrid MBR)
>>502 ulelong !1 \b (nonstandard: not at LBA 1)

# Print the information from a GPT partition table structure
0 name gpt-table
>10 uleshort x \b, version %u
>8 uleshort x \b.%u
>56 ulelong x \b, GUID: %08x
>60 uleshort x \b-%04x
>62 uleshort x \b-%04x
>64 ubeshort x \b-%04x
>66 ubeshort x \b-%04x
>68 ubelong x \b%08x
#>80 uleshort x \b, %d partition entries
>32 ulequad+1 x \b, disk size: %lld sectors

# In case a GPT data-structure is at LBA 0, report it as well
# This covers systems which are not GPT-aware, and which show
# and allow access to the protective partition. This code will
# detect the contents of such a partition.
0 string EFI\ PART GPT data structure (nonstandard: at LBA 0)
>0 use gpt-table
>0 ubyte x (sector size unknown)