1#!/bin/sh
2#
3# Copyright (C) 2008 The FreeBSD Project. All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9#   notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright
11#   notice, this list of conditions and the following disclaimer in the
12#   documentation and/or other materials provided with the distribution.
13#
14# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24# SUCH DAMAGE.
25#
26# $FreeBSD: releng/11.0/sys/tools/embed_mfs.sh 295137 2016-02-02 07:02:51Z adrian $ 
27#
28# Embed the MFS image into the kernel body (expects space reserved via 
29# MD_ROOT_SIZE)
30#
31# $1: kernel filename
32# $2: MFS image filename
33#
34
35mfs_size=`stat -f '%z' $2 2> /dev/null`
36# If we can't determine MFS image size - bail.
37[ -z ${mfs_size} ] && echo "Can't determine MFS image size" && exit 1
38
39sec_info=`objdump -h $1 2> /dev/null | grep " oldmfs "`
40# If we can't find the mfs section within the given kernel - bail.
41[ -z "${sec_info}" ] && echo "Can't locate mfs section within kernel" && exit 1
42
43sec_size=`echo ${sec_info} | awk '{printf("%d", "0x" $3)}' 2> /dev/null`
44sec_start=`echo ${sec_info} | awk '{printf("%d", "0x" $6)}' 2> /dev/null`
45
46# If the mfs section size is smaller than the mfs image - bail.
47[ ${sec_size} -lt ${mfs_size} ] && echo "MFS image too large" && exit 1
48
49# Dump the mfs image into the mfs section
50dd if=$2 ibs=8192 of=$1 obs=${sec_start} oseek=1 conv=notrunc 2> /dev/null && \
51    echo "MFS image embedded into kernel" && exit 0
52