#!/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.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# $FreeBSD: stable/11/sys/tools/fdt/embed_dtb.sh 208749 2010-06-02 17:22:38Z raj $

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

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