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 # $FreeBSD$
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
35 if [ $# -ne 2 ]; then
36 echo "usage: $(basename $0) target mfs_image"
37 exit 0
38 fi
39 if [ ! -w "$1" ]; then
40 echo $1 not writable
41 exit 1
42 fi
43
44 mfs_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
48 err_no_mfs="Can't locate mfs section within "
49
50 if 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
60 else
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
76 fi
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
82 dd 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
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