58 lines
1.5 KiB
Python
58 lines
1.5 KiB
Python
# Merges bootloader and application into 1 file for ST Solo
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#
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# Patches settings in flash so bootloader will boot application.
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from intelhex import IntelHex
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import sys
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from binascii import unhexlify
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if len(sys.argv) < 3:
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print('usage: %s <file1.hex> <file2.hex> [...] [-s <secret_attestation_key>] <output.hex>')
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sys.exit(1)
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def flash_addr(num):
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return 0x08000000 + num * 2048
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args = sys.argv[:]
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# generic / hacker attestation key
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secret_attestation_key = "1b2626ecc8f69b0f69e34fb236d76466ba12ac16c3ab5750ba064e8b90e02448"
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# user supplied, optional
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for i,x in enumerate(args):
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if x == '-s':
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secret_attestation_key = args[i+1]
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args = args[:i] + args[i+2:]
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break
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# TODO put definitions somewhere else
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PAGES = 128
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APPLICATION_END_PAGE = PAGES - 19
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AUTH_WORD_ADDR = (flash_addr(APPLICATION_END_PAGE)-8)
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ATTEST_ADDR = (flash_addr(PAGES - 15))
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first = IntelHex(args[1])
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for i in range(2, len(args)-1):
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print('merging %s with ' % (args[1]), args[i])
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first.merge(IntelHex( args[i] ), overlap = 'replace')
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first[AUTH_WORD_ADDR] = 0
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first[AUTH_WORD_ADDR+1] = 0
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first[AUTH_WORD_ADDR+2] = 0
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first[AUTH_WORD_ADDR+3] = 0
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first[AUTH_WORD_ADDR+4] = 0xff
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first[AUTH_WORD_ADDR+5] = 0xff
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first[AUTH_WORD_ADDR+6] = 0xff
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first[AUTH_WORD_ADDR+7] = 0xff
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if secret_attestation_key is not None:
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key = unhexlify(secret_attestation_key)
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for i,x in enumerate(key):
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first[ATTEST_ADDR + i] = x
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first.tofile(args[len(args)-1], format='hex')
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