acrn-hypervisor/doc/tutorials/gpt_ini2bin.py

114 lines
3.2 KiB
Python
Executable File

#!/usr/bin/env python
# Copyright (C) 2018 Intel Corporation.
# SPDX-License-Identifier: BSD-3-Clause
import ConfigParser
import uuid
import struct
import sys
type_2_guid = {
# official guid for gpt partition type
'fat' : 'ebd0a0a2-b9e5-4433-87c0-68b6b72699c7',
'esp' : 'c12a7328-f81f-11d2-ba4b-00a0c93ec93b',
'linux' : '0fc63daf-8483-4772-8e79-3d69d8477de4',
'linux-swap' : '0657fd6d-a4ab-43c4-84e5-0933c84b4f4f',
# generated guid for android
'boot' : '49a4d17f-93a3-45c1-a0de-f50b2ebe2599',
'recovery' : '4177c722-9e92-4aab-8644-43502bfd5506',
'misc' : 'ef32a33b-a409-486c-9141-9ffb711f6266',
'metadata' : '20ac26be-20b7-11e3-84c5-6cfdb94711e9',
'tertiary' : '767941d0-2085-11e3-ad3b-6cfdb94711e9',
'factory' : '9fdaa6ef-4b3f-40d2-ba8d-bff16bfb887b' }
def zero_pad(s, size):
if (len(s) > size):
print 'error', len(s)
s += '\0' * (size - len(s))
return s
def copy_section(cfg, a, b):
cfg.add_section(b)
for option in cfg.options(a):
cfg.set(b, option, cfg.get(a, option))
def preparse_slots(cfg, partitions):
if not cfg.has_option('base', 'nb_slot'):
return partitions
nb_slot = cfg.getint('base', 'nb_slot')
parts_with_slot = []
for p in partitions:
section = "partition." + p
if cfg.has_option(section, 'has_slot'):
for i in range(ord('a'), ord('a') + nb_slot):
suffix = "_%c" % i
new_part = p + suffix
new_section = "partition." + new_part
copy_section(cfg, section, new_section)
cfg.set(new_section, 'label', cfg.get(section, 'label') + suffix)
parts_with_slot.append(new_part);
else:
parts_with_slot.append(p);
return parts_with_slot
def preparse_partitions(gpt_in, cfg):
with open(gpt_in, 'r') as f:
data = f.read()
partitions = cfg.get('base', 'partitions').split()
for l in data.split('\n'):
words = l.split()
if len(words) > 2:
if words[0] == 'partitions' and words[1] == '+=':
partitions += words[2:]
return partitions
def main():
if len(sys.argv) != 2:
print 'Usage : ', sys.argv[0], 'gpt_in1.ini'
print ' write binary to stdout'
sys.exit(1)
gpt_in = sys.argv[1]
cfg = ConfigParser.SafeConfigParser()
cfg.read(gpt_in)
part = preparse_partitions(gpt_in, cfg)
part = preparse_slots(cfg, part)
magic = 0x6a8b0da1
start_lba = 0
if cfg.has_option('base', 'start_lba'):
start_lba = cfg.getint('base', 'start_lba')
npart = len(part)
out = sys.stdout
out.write(struct.pack('<I', magic))
out.write(struct.pack('<I', start_lba))
out.write(struct.pack('<I', npart))
for p in part:
length = cfg.get('partition.' + p, 'len')
out.write(struct.pack('<i', int(length)))
label = cfg.get('partition.' + p, 'label').encode('utf-16le')
out.write(zero_pad(label, 36 * 2))
guid_type = cfg.get('partition.' + p, 'type')
guid_type = uuid.UUID(type_2_guid[guid_type])
out.write(guid_type.bytes_le)
guid = uuid.uuid4()
out.write(guid.bytes_le)
if __name__ == "__main__":
main()