FreeBSD/Linux Kernel Cross Reference
sys/tools/fdt/embed_dtb.sh

     #!/bin/sh
     #
     # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
     #
     # Copyright (c) 2010 The FreeBSD Foundation
     #
     # 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

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