f4c1f0b9eb
MD_ROOT_SIZE and embed_mfs.sh were basically retired as part of https://reviews.freebsd.org/D2903 . However, when building a kernel with 'options MD_ROOT_SIZE' specified, this results in a non-working MFS, as within sys/dev/md/md.c we fall within the wrong # ifdef. This patch implements the following: * Allow kernels to be built without the MD_ROOT_SIZE option, which results in a kernel built as per D2903. * Allow kernels to be built with the MD_ROOT_SIZE option, which results in a kernel built similarly to the pre-D2903 way, with the following differences: * The MFS is now put in a separate section within the kernel (oldmfs, so it differs from the mfs section introduced by D2903). * embed_mfs.sh is changed, so it looks up the oldmfs section within the kernel, gets its size and offset, sees if the MFS will fit within the allocated oldmfs section and only if all is well does a dd of the MFS image into the kernel. Submitted by: Stanislav Galabov <sgalabov@gmail.com> Reviewed by: brooks, imp Differential Revision: https://reviews.freebsd.org/D5093
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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