This is a small script hacked together to convert a memory dump
obtained by md.b in U-Boot via a serial console to binary form. (The
particular U-Boot used here was an ancient U-Boot 2008.10)
The script expects the output of md.b on stdin and outputs the
binary data to stdout. It does a couple of consistency checks when
doing so (consecutive addresses at the beginning of lines; mapping
between hex representation and ASCII representation of a byte is
consistent.)
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In U-Boot, do e.g. the following (and capture the serial communication):
=> md.b 0x4000000 0x50 04000000: de ad be ef de ad be ef de ad be ef de ad be ef ................ 04000010: de ad be ef de ad be ef de ad be ef de ad be ef ................ 04000020: de ad be ef de ad be ef de ad be ef de ad be ef ................ 04000030: de ad be ef de ad be ef de ad be ef de ad be ef ................ 04000040: de ad be ef de ad be ef de ad be ef de ad be ef ................ =>Note: The length must be a multiple of 0x10!
-
Remove all but the output of
md.bfrom the serial capture file. -
Pipe it through uboot_mdb_to_image.py
# python3 uboot_mdb_to_image.py < test.cap | hexdump -C 00000000 de ad be ef de ad be ef de ad be ef de ad be ef |................| * 00000050