blob: 42d6bcefb400bc3d96c8897eb85f9cc9fd892521 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
#!/bin/sh
# extracts .config info from a [b]zImage file
# uses: binoffset (new), dd, zcat, strings, grep
# $arg1 is [b]zImage filename
binoffset="./scripts/binoffset"
test -e $binoffset || cc -o $binoffset ./scripts/binoffset.c || exit 1
IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54"
IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44"
dump_config() {
file="$1"
start=`$binoffset $file $IKCFG_ST 2>/dev/null`
[ "$?" != "0" ] && start="-1"
if [ "$start" -eq "-1" ]; then
return
fi
end=`$binoffset $file $IKCFG_ED 2>/dev/null`
[ "$?" != "0" ] && end="-1"
if [ "$end" -eq "-1" ]; then
return
fi
start=`expr $start + 8`
size=`expr $end - $start`
dd if="$file" ibs=1 skip="$start" count="$size" 2>/dev/null | zcat
clean_up
exit 0
}
usage()
{
echo " usage: extract-ikconfig [b]zImage_filename"
}
clean_up()
{
if [ "$TMPFILE" != "" ]; then
rm -f $TMPFILE
fi
}
if [ $# -lt 1 ]
then
usage
exit 1
fi
TMPFILE=`mktemp -t ikconfig-XXXXXX` || exit 1
image="$1"
# vmlinux: Attempt to dump the configuration from the file directly
dump_config "$image"
GZHDR1="0x1f 0x8b 0x08 0x00"
GZHDR2="0x1f 0x8b 0x08 0x08"
# vmlinux.gz: Check for a compressed images
off=`$binoffset "$image" $GZHDR1 2>/dev/null`
[ "$?" != "0" ] && off="-1"
if [ "$off" -eq "-1" ]; then
off=`$binoffset "$image" $GZHDR2 2>/dev/null`
[ "$?" != "0" ] && off="-1"
fi
if [ "$off" -eq "0" ]; then
zcat <"$image" >"$TMPFILE"
dump_config "$TMPFILE"
elif [ "$off" -ne "-1" ]; then
(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \
zcat >"$TMPFILE"
dump_config "$TMPFILE"
fi
echo "ERROR: Unable to extract kernel configuration information."
echo " This kernel image may not have the config info."
clean_up
exit 1
|
