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: stable/11/sys/tools/embed_mfs.sh 331691 2018-03-28 17:19:04Z emaste $ 27# 28# Embed an MFS image into the kernel body or the loader body (expects space 29# reserved via MD_ROOT_SIZE (kernel) or MD_IMAGE_SIZE (loader)) 30# 31# $1: kernel or loader filename 32# $2: MFS image filename 33# 34 35if [ $# -ne 2 ]; then 36 echo "usage: $(basename $0) target mfs_image" 37 exit 0 38fi 39if [ ! -w "$1" ]; then 40 echo $1 not writable 41 exit 1 42fi 43 44mfs_size=`stat -f '%z' $2 2> /dev/null` 45# If we can't determine MFS image size - bail. 46[ -z ${mfs_size} ] && echo "Can't determine MFS image size" && exit 1 47 48err_no_mfs="Can't locate mfs section within " 49 50if file -b $1 | grep -q '^ELF ..-bit .SB executable'; then 51 52 sec_info=`elfdump -c $1 2> /dev/null | grep -A 5 -E "sh_name: oldmfs$"` 53 # If we can't find the mfs section within the given kernel - bail. 54 [ -z "${sec_info}" ] && echo "${err_no_mfs} $1" && exit 1 55 56 sec_size=`echo "${sec_info}" | awk '/sh_size/ {print $2}' 2>/dev/null` 57 sec_start=`echo "${sec_info}" | \ 58 awk '/sh_offset/ {print $2}' 2>/dev/null` 59 60else 61 62 #try to find start byte of MFS start flag otherwise - bail. 63 sec_start=`strings -at d $1 | grep "MFS Filesystem goes here"` || \ 64 { echo "${err_no_mfs} $1"; exit 1; } 65 sec_start=`echo ${sec_start} | awk '{print $1}'` 66 67 #try to find start byte of MFS end flag otherwise - bail. 68 sec_end=`strings -at d $1 | \ 69 grep "MFS Filesystem had better STOP here"` || \ 70 { echo "${err_no_mfs} $1"; exit 1; } 71 sec_end=`echo ${sec_end} | awk '{print $1}'` 72 73 #calculate MFS section size 74 sec_size=`expr ${sec_end} - ${sec_start}` 75 76fi 77 78# If the mfs section size is smaller than the mfs image - bail. 79[ ${sec_size} -lt ${mfs_size} ] && echo "MFS image too large" && exit 1 80 81# Dump the mfs image into the mfs section 82dd if=$2 ibs=8192 of=$1 obs=${sec_start} oseek=1 conv=notrunc 2> /dev/null && \ 83 echo "MFS image embedded into $1" && exit 0 84