file/magic/Magdir/gpt

#------------------------------------------------------------------------------
# $File: gpt,v 1.5 2020/12/12 20:01:47 christos Exp $
#
# GPT Partition table patterns.
# Author: Rogier Goossens (goossens.rogier@gmail.com)
# 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)