From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/scripts/signrom.py | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 qemu/scripts/signrom.py (limited to 'qemu/scripts/signrom.py') diff --git a/qemu/scripts/signrom.py b/qemu/scripts/signrom.py new file mode 100644 index 000000000..f9c35ccfc --- /dev/null +++ b/qemu/scripts/signrom.py @@ -0,0 +1,40 @@ +# +# Option ROM signing utility +# +# Authors: +# Jan Kiszka +# +# This work is licensed under the terms of the GNU GPL, version 2 or later. +# See the COPYING file in the top-level directory. + +import sys +import struct + +if len(sys.argv) < 3: + print('usage: signrom.py input output') + sys.exit(1) + +fin = open(sys.argv[1], 'rb') +fout = open(sys.argv[2], 'wb') + +fin.seek(2) +size = ord(fin.read(1)) * 512 - 1 + +fin.seek(0) +data = fin.read(size) +fout.write(data) + +checksum = 0 +for b in data: + # catch Python 2 vs. 3 differences + if isinstance(b, int): + checksum += b + else: + checksum += ord(b) +checksum = (256 - checksum) % 256 + +# Python 3 no longer allows chr(checksum) +fout.write(struct.pack('B', checksum)) + +fin.close() +fout.close() -- cgit 1.2.3-korg