1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1.6 KiB
Executable File
#!/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