1#!/bin/sh 2# 3# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 4# 5# Copyright (C) 2008 The FreeBSD Project. All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30# Embed an MFS image into the kernel body or the loader body (expects space 31# reserved via MD_ROOT_SIZE (kernel) or MD_IMAGE_SIZE (loader)) 32# 33# $1: kernel or loader filename 34# $2: MFS image filename 35# 36 37if [ $# -ne 2 ]; then 38 echo "usage: $(basename $0) target mfs_image" 39 exit 0 40fi 41if [ ! -w "$1" ]; then 42 echo $1 not writable 43 exit 1 44fi 45 46mfs_size=`stat -f '%z' $2 2> /dev/null` 47# If we can't determine MFS image size - bail. 48[ -z ${mfs_size} ] && echo "Can't determine MFS image size" && exit 1 49 50err_no_mfs="Can't locate mfs section within " 51 52if file -b $1 | grep -q '^ELF ..-bit .SB executable'; then 53 54 sec_info=`elfdump -c $1 2> /dev/null | grep -A 5 -E "sh_name: oldmfs$"` 55 # If we can't find the mfs section within the given kernel - bail. 56 [ -z "${sec_info}" ] && echo "${err_no_mfs} $1" && exit 1 57 58 sec_size=`echo "${sec_info}" | awk '/sh_size/ {print $2}' 2>/dev/null` 59 sec_start=`echo "${sec_info}" | \ 60 awk '/sh_offset/ {print $2}' 2>/dev/null` 61 62else 63 64 #try to find start byte of MFS start flag otherwise - bail. 65 sec_start=`strings -at d $1 | grep "MFS Filesystem goes here"` || \ 66 { echo "${err_no_mfs} $1"; exit 1; } 67 sec_start=`echo ${sec_start} | awk '{print $1}'` 68 69 #try to find start byte of MFS end flag otherwise - bail. 70 sec_end=`strings -at d $1 | \ 71 grep "MFS Filesystem had better STOP here"` || \ 72 { echo "${err_no_mfs} $1"; exit 1; } 73 sec_end=`echo ${sec_end} | awk '{print $1}'` 74 75 #calculate MFS section size 76 sec_size=`expr ${sec_end} - ${sec_start}` 77 78fi 79 80# If the mfs section size is smaller than the mfs image - bail. 81[ ${sec_size} -lt ${mfs_size} ] && echo "MFS image too large" && exit 1 82 83# Dump the mfs image into the mfs section 84dd if=$2 ibs=8192 of=$1 obs=${sec_start} oseek=1 conv=notrunc 2> /dev/null && \ 85 echo "MFS image embedded into $1" && exit 0 86