#!/bin/sh
#
# Copyright (c) 2010 The FreeBSD Foundation
# All rights reserved.
#
# This software was developed by Semihalf under sponsorship from
# the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$

# $1: kernel filename
# $2: device tree blob filename

dtbsize=`ls -l $2 | awk '{print $5}'`
obs=`strings -at d $1 | grep "Device Tree Blob STARTS here" | awk '{print $1}'`
eol=`strings -at d $1 | grep "Device Tree Blob STOPS here" | awk '{print $1}'`
sz=$((eol - obs));
if [ $sz -lt $dtbsize ]
then
	echo "Selected blob is too big to reembed. Please rebuild the kernel."
	exit
fi
dd if=$2 ibs=${dtbsize} of=$1 obs=${obs} oseek=1 conv=notrunc 2> /dev/null
