mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
78 lines
1.6 KiB
Plaintext
78 lines
1.6 KiB
Plaintext
|
#!/bin/sh
|
||
|
|
# extracts .config info from a [b]zImage file
|
||
|
|
# uses: binoffset (new), dd, zcat, strings, grep
|
||
|
|
# $arg1 is [b]zImage filename
|
||
|
|
|
||
|
|
binoffset="./scripts/binoffset"
|
||
|
|
|
||
|
|
IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54"
|
||
|
|
IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44"
|
||
|
|
function dump_config {
|
||
|
|
typeset file="$1"
|
||
|
|
|
||
|
|
start=`$binoffset $file $IKCFG_ST 2>/dev/null`
|
||
|
|
[ "$?" != "0" ] && start="-1"
|
||
|
|
if [ "$start" -eq "-1" ]; then
|
||
|
|
return
|
||
|
|
fi
|
||
|
|
end=`$binoffset $file $IKCFG_ED 2>/dev/null`
|
||
|
|
|
||
|
|
let start="$start + 8"
|
||
|
|
let size="$end - $start"
|
||
|
|
|
||
|
|
head --bytes="$end" "$file" | tail --bytes="$size" | zcat
|
||
|
|
|
||
|
|
clean_up
|
||
|
|
exit 0
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
usage()
|
||
|
|
{
|
||
|
|
echo " usage: extract-ikconfig [b]zImage_filename"
|
||
|
|
}
|
||
|
|
|
||
|
|
clean_up()
|
||
|
|
{
|
||
|
|
if [ "$TMPFILE" != "" ]; then
|
||
|
|
rm -f $TMPFILE
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
if [ $# -lt 1 ]
|
||
|
|
then
|
||
|
|
usage
|
||
|
|
exit 1
|
||
|
|
fi
|
||
|
|
|
||
|
|
TMPFILE="/tmp/ikconfig-$$"
|
||
|
|
image="$1"
|
||
|
|
|
||
|
|
# vmlinux: Attempt to dump the configuration from the file directly
|
||
|
|
dump_config "$image"
|
||
|
|
|
||
|
|
GZHDR1="0x1f 0x8b 0x08 0x00"
|
||
|
|
GZHDR2="0x1f 0x8b 0x08 0x08"
|
||
|
|
|
||
|
|
# vmlinux.gz: Check for a compressed images
|
||
|
|
off=`$binoffset "$image" $GZHDR1 2>/dev/null`
|
||
|
|
[ "$?" != "0" ] && off="-1"
|
||
|
|
if [ "$off" -eq "-1" ]; then
|
||
|
|
off=`$binoffset "$image" $GZHDR2 2>/dev/null`
|
||
|
|
[ "$?" != "0" ] && off="-1"
|
||
|
|
fi
|
||
|
|
if [ "$off" -eq "0" ]; then
|
||
|
|
zcat <"$image" >"$TMPFILE"
|
||
|
|
dump_config "$TMPFILE"
|
||
|
|
elif [ "$off" -ne "-1" ]; then
|
||
|
|
(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \
|
||
|
|
zcat >"$TMPFILE"
|
||
|
|
dump_config "$TMPFILE"
|
||
|
|
fi
|
||
|
|
|
||
|
|
echo "ERROR: Unable to extract kernel configuration information."
|
||
|
|
echo " This kernel image may not have the config info."
|
||
|
|
|
||
|
|
clean_up
|
||
|
|
exit 1
|