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authorMichael S. Tsirkin <mst@redhat.com>2010-12-01 07:11:51 +0200
committerMichael S. Tsirkin <mst@redhat.com>2010-12-01 07:11:51 +0200
commitc924f36a300cbc54d3cb511116e8e2bae17f5ae6 (patch)
tree04e57676b1db1db7d8b33934b349f8f37780fa2a /pc-bios/optionrom
parent1abeb5a65d515f8a8a9cfc4a82342f731bd9321f (diff)
parent09fa35e5cdc7d17ed3e1528ca743893ae77a0ea2 (diff)
Merge remote branch 'origin/master' into pci
Conflicts: Makefile.objs hw/virtio.c
Diffstat (limited to 'pc-bios/optionrom')
-rwxr-xr-xpc-bios/optionrom/signrom.sh7
1 files changed, 3 insertions, 4 deletions
diff --git a/pc-bios/optionrom/signrom.sh b/pc-bios/optionrom/signrom.sh
index 975b27dd60..9dc5c63dde 100755
--- a/pc-bios/optionrom/signrom.sh
+++ b/pc-bios/optionrom/signrom.sh
@@ -31,14 +31,13 @@ x=`dd if="$1" bs=1 count=1 skip=2 2>/dev/null | od -t u1 -A n`
size=$(( $x * 512 - 1 ))
# now get the checksum
-nums=`od -A n -t u1 -v "$1"`
+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`
+ sum=`expr \( $sum + $i \) % 256`
done
-sum=$(( $sum % 256 ))
-sum=$(( 256 - $sum ))
+sum=$(( (256 - $sum) % 256 ))
sum_octal=$( printf "%o" $sum )
# and write the output file