52 lines
2.3 KiB
Bash
52 lines
2.3 KiB
Bash
#!/bin/sh
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#
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# Copyright (C) 2008 The FreeBSD Project. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# Embed the MFS image into the kernel body (expects space reserved via
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# MD_ROOT_SIZE)
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#
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# $1: kernel filename
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# $2: MFS image filename
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#
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mfs_size=`stat -f '%z' $2 2> /dev/null`
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# If we can't determine MFS image size - bail.
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[ -z ${mfs_size} ] && echo "Can't determine MFS image size" && exit 1
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sec_info=`objdump -h $1 2> /dev/null | grep " oldmfs "`
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# If we can't find the mfs section within the given kernel - bail.
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[ -z "${sec_info}" ] && echo "Can't locate mfs section within kernel" && exit 1
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sec_size=`echo ${sec_info} | awk '{printf("%d", "0x" $3)}' 2> /dev/null`
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sec_start=`echo ${sec_info} | awk '{printf("%d", "0x" $6)}' 2> /dev/null`
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# If the mfs section size is smaller than the mfs image - bail.
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[ ${sec_size} -lt ${mfs_size} ] && echo "MFS image too large" && exit 1
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# Dump the mfs image into the mfs section
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dd if=$2 ibs=8192 of=$1 obs=${sec_start} oseek=1 conv=notrunc 2> /dev/null && \
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echo "MFS image embedded into kernel" && exit 0
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