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kernel.py
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kernel.py
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#!/usr/bin/env python3
from common import *
"""
Build a combined SE/CE bootloader buffer from HV and kernel parts
Parameters are in bytes
Returns bytes
"""
def combinehvkernel(hv_dec, kernel_dec):
return bytes(hv_dec + kernel_dec)
"""
Split a combined buffer into HV and kernel parts
Parameters are in bytes
Returns tuple of bytes
"""
def splitbootloader(bootloader_dec):
return (bytes(bootloader_dec[:Constants.HV_SIZE]), bytes(bootloader_dec[Constants.HV_SIZE:]))
def main(argv):
parser=argparse.ArgumentParser()
arggroup = parser.add_mutually_exclusive_group(required=True)
arggroup.add_argument('--split', '-s', help="Split decompressed CE/SE into kernel + HV parts", type=str, nargs=1, metavar='se.bin' )
arggroup.add_argument('--combine', '-c', help="Combine split kernel + HV parts back into decompressed CE/SE", type=str, nargs=2, metavar=('hv.bin', 'xboxkrnl.bin') )
args = parser.parse_args(argv[1:])
if args.split:
se = args.split[0]
hv = se + '_HV.bin'
kernel = se + '_xboxkrnl.exe'
with open(se, 'rb') as sefile:
bootloaderdata = sefile.read()
hvdata, kerneldata = splitbootloader(bootloaderdata)
with open(hv, 'w+b') as hvfile:
hvfile.write(hvdata)
with open(kernel, 'w+b') as kernelfile:
kernelfile.write(kerneldata)
print('Successfully split SE')
elif args.combine:
hv, kernel, out = args.combine[0], args.combine[1], 'SE_dec.bin'
with open(out, 'w+b') as outfile:
with open(hv, 'rb') as hvfile:
hvdata = hvfile.read()
with open(kernel, 'rb') as kernelfile:
kerneldata = kernelfile.read()
outfile.write(combinehvkernel(hvdata, kerneldata))
print('Successfully combined SE')
if __name__ == '__main__':
import argparse, sys
main(sys.argv)