From 6be51ffc1791b72d11cef9bb0a578fe8c5d64c6a Mon Sep 17 00:00:00 2001
From: Steven Rostedt
Date: Thu, 30 Apr 2009 12:22:20 -0400
Subject: 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>
---
 scripts/extract-ikconfig | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
index 42d6bcefb400..de233ff43c1c 100755
--- a/scripts/extract-ikconfig
+++ b/scripts/extract-ikconfig
@@ -59,6 +59,8 @@ dump_config "$image"
 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 @@ elif [ "$off" -ne "-1" ]; then
 	(dd ibs="$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."
-- 
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