Now that we have a hard dependency on python anyway, we can replace the
slow shell script to calculate the option ROM checksum with a fast AND
portable python version. Tested both with python 2.7 and 3.1.
Signed-off-by: Jan Kiszka <address@hidden>
---
pc-bios/optionrom/Makefile | 2 +-
scripts/signrom.py | 40 +++++++++++++++++++++++++++++++++++++++
scripts/signrom.sh | 45 --------------------------------------------
3 files changed, 41 insertions(+), 46 deletions(-)
create mode 100644 scripts/signrom.py
delete mode 100755 scripts/signrom.sh
diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index f6b4027..57d8bd0 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -26,7 +26,7 @@ build-all: multiboot.bin linuxboot.bin kvmvapic.bin
$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@," Building
$(TARGET_DIR)$@")
%.bin: %.raw
- $(call quiet-command,$(SHELL) $(SRC_PATH)/scripts/signrom.sh $< $@,"
Signing $(TARGET_DIR)$@")
+ $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $<
$@," Signing $(TARGET_DIR)$@")
clean:
rm -f *.o *.d *.raw *.img *.bin *~
diff --git a/scripts/signrom.py b/scripts/signrom.py
new file mode 100644
index 0000000..f9c35cc
--- /dev/null
+++ b/scripts/signrom.py
@@ -0,0 +1,40 @@
+#
+# Option ROM signing utility
+#
+# Authors:
+# Jan Kiszka <address@hidden>
+#
+# 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()
diff --git a/scripts/signrom.sh b/scripts/signrom.sh
deleted file mode 100755
index 9dc5c63..0000000
--- a/scripts/signrom.sh
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/bin/sh
-
-# Option ROM Signing utility
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, see <http://www.gnu.org/licenses/>.
-#
-# Copyright Novell Inc, 2009
-# Authors: Alexander Graf <address@hidden>
-#
-# Syntax: signrom.sh <input> <output>
-
-# did we get proper arguments?
-test "$1" -a "$2" || exit 1
-
-sum=0
-
-# find out the file size
-x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null | od -t u1 -A n`
-#size=`expr $x \* 512 - 1`
-size=$(( $x * 512 - 1 ))
-
-# now get the checksum
-nums=`od -A n -t u1 -v -N $size "$1"`
-for i in ${nums}; do
- # add each byte's value to sum
- sum=`expr \( $sum + $i \) % 256`
-done
-
-sum=$(( (256 - $sum) % 256 ))
-sum_octal=$( printf "%o" $sum )
-
-# and write the output file
-cp "$1" "$2"
-printf "\\$sum_octal" | dd of="$2" bs=1 count=1 seek=$size
conv=notrunc 2>/dev/null