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https://github.com/Atmosphere-NX/Atmosphere.git
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38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
#!/usr/bin/env python
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import sys, lz4
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from struct import unpack as up
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def lz4_compress(data):
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try:
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import lz4.block as block
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except ImportError:
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block = lz4.LZ4_compress
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return block.compress(data, 'high_compression', store_size=False)
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def split_binary(data):
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A, B, START, BOOT_CODE_START, BOOT_CODE_END, PROGRAM_START, C, D = up('<QQQQQQQQ', data[:0x40])
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assert A == 0xAAAAAAAAAAAAAAAA
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assert B == 0xBBBBBBBBBBBBBBBB
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assert C == 0xCCCCCCCCCCCCCCCC
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assert D == 0xDDDDDDDDDDDDDDDD
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data = data[0x40:]
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#print ('%X %X %X %X' % (START, BOOT_CODE_START, BOOT_CODE_END, PROGRAM_START))
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boot_code = data[BOOT_CODE_START - START:BOOT_CODE_END - BOOT_CODE_START]
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program = data[PROGRAM_START - START:]
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return [('boot_code.lz4', lz4_compress(boot_code)), ('program.lz4', lz4_compress(program))]
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def main(argc, argv):
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if argc != 3:
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print('Usage: %s in outdir' % argv[0])
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return 1
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with open(argv[1], 'rb') as f:
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data = f.read()
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assert len(data) >= 0x40
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for (fn, fdata) in split_binary(data):
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with open('%s/%s' % (argv[2], fn), 'wb') as f:
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f.write(fdata)
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return 0
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if __name__ == '__main__':
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sys.exit(main(len(sys.argv), sys.argv))
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