x86: split generic image building into a separate script

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33511 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 39 insertions, 0 deletions

diff --git a/target/linux/x86/image/gen_image_generic.sh b/target/linux/x86/image/gen_image_generic.sh
new file mode 100755
index 0000000000..9d11efbb05
--- /dev/null
+++ b/target/linux/x86/image/gen_image_generic.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# Copyright (C) 2006-2012 OpenWrt.org
+set -x
+[ $# == 5 -o $# == 6 ] || {
+    echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
+    exit 1
+}
+
+OUTPUT="$1"
+KERNELSIZE="$2"
+KERNELDIR="$3"
+ROOTFSSIZE="$4"
+ROOTFSIMAGE="$5"
+ALIGN="$6"
+
+rm -f "$OUTPUT"
+
+head=16
+sect=63
+cyl=$(( ($KERNELSIZE + $ROOTFSSIZE) * 1024 * 1024 / ($head * $sect * 512)))
+
+# create partition table
+set `ptgen -o "$OUTPUT" -h $head -s $sect -p ${KERNELSIZE}m -p ${ROOTFSSIZE}m ${ALIGN:+-l $ALIGN}`
+
+KERNELOFFSET="$(($1 / 512))"
+KERNELSIZE="$(($2 / 512))"
+ROOTFSOFFSET="$(($3 / 512))"
+ROOTFSSIZE="$(($4 / 512))"
+
+BLOCKS="$((($KERNELSIZE / 2) - 1))"
+
+[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
+dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
+
+[ -n "$NOGRUB" ] && exit 0
+
+genext2fs -d "$KERNELDIR" -b "$BLOCKS" "$OUTPUT.kernel"
+dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
+rm -f "$OUTPUT.kernel"