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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/extract-ikconfig
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'scripts/extract-ikconfig')
-rwxr-xr-xscripts/extract-ikconfig77
1 files changed, 77 insertions, 0 deletions
diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
new file mode 100755
index 000000000000..d9f9f34b22ab
--- /dev/null
+++ b/scripts/extract-ikconfig
@@ -0,0 +1,77 @@
+#!/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