kconfig: have extract-ikconfig read ELF files
It would be nice to use extract-ikconfig to find the congfig.gz
in either vmlinux (not vmlinuz) or configs.ko.
This patch changes the script to also be able to read ELF files directly.
[ Impact: find config.gz in vmlinux and configs.ko ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
index 42d6bce..de233ff 100755
--- a/scripts/extract-ikconfig
+++ b/scripts/extract-ikconfig
@@ -59,6 +59,8 @@
GZHDR1="0x1f 0x8b 0x08 0x00"
GZHDR2="0x1f 0x8b 0x08 0x08"
+ELFHDR="0x7f 0x45 0x4c 0x46"
+
# vmlinux.gz: Check for a compressed images
off=`$binoffset "$image" $GZHDR1 2>/dev/null`
[ "$?" != "0" ] && off="-1"
@@ -73,6 +75,14 @@
(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \
zcat >"$TMPFILE"
dump_config "$TMPFILE"
+
+# check if this is simply an ELF file
+else
+ off=`$binoffset "$image" $ELFHDR 2>/dev/null`
+ [ "$?" != "0" ] && off="-1"
+ if [ "$off" -eq "0" ]; then
+ dump_config "$image"
+ fi
fi
echo "ERROR: Unable to extract kernel configuration information."