| | 1 | #!/bin/sh |
| | 2 | # extracts .config info from a [b]zImage file |
| | 3 | # uses: binoffset (new), dd, zcat, strings, grep |
| | 4 | # $arg1 is [b]zImage filename |
| | 5 | |
| | 6 | binoffset="./scripts/binoffset" |
| | 7 | test -e $binoffset || cc -o $binoffset ./scripts/binoffset.c || exit 1 |
| | 8 | |
| | 9 | IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54" |
| | 10 | IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44" |
| | 11 | dump_config() { |
| | 12 | file="$1" |
| | 13 | |
| | 14 | start=`$binoffset $file $IKCFG_ST 2>/dev/null` |
| | 15 | [ "$?" != "0" ] && start="-1" |
| | 16 | if [ "$start" -eq "-1" ]; then |
| | 17 | return |
| | 18 | fi |
| | 19 | end=`$binoffset $file $IKCFG_ED 2>/dev/null` |
| | 20 | [ "$?" != "0" ] && end="-1" |
| | 21 | if [ "$end" -eq "-1" ]; then |
| | 22 | return |
| | 23 | fi |
| | 24 | |
| | 25 | start=`expr $start + 8` |
| | 26 | size=`expr $end - $start` |
| | 27 | |
| | 28 | dd if="$file" ibs=1 skip="$start" count="$size" 2>/dev/null | zcat |
| | 29 | |
| | 30 | clean_up |
| | 31 | exit 0 |
| | 32 | } |
| | 33 | |
| | 34 | |
| | 35 | usage() |
| | 36 | { |
| | 37 | echo " usage: extract-ikconfig [b]zImage_filename" |
| | 38 | } |
| | 39 | |
| | 40 | clean_up() |
| | 41 | { |
| | 42 | if [ "$TMPFILE" != "" ]; then |
| | 43 | rm -f $TMPFILE |
| | 44 | fi |
| | 45 | } |
| | 46 | |
| | 47 | if [ $# -lt 1 ] |
| | 48 | then |
| | 49 | usage |
| | 50 | exit 1 |
| | 51 | fi |
| | 52 | |
| | 53 | TMPFILE=`mktemp -t ikconfig-XXXXXX` || exit 1 |
| | 54 | image="$1" |
| | 55 | |
| | 56 | # vmlinux: Attempt to dump the configuration from the file directly |
| | 57 | dump_config "$image" |
| | 58 | |
| | 59 | GZHDR1="0x1f 0x8b 0x08 0x00" |
| | 60 | GZHDR2="0x1f 0x8b 0x08 0x08" |
| | 61 | |
| | 62 | ELFHDR="0x7f 0x45 0x4c 0x46" |
| | 63 | |
| | 64 | # vmlinux.gz: Check for a compressed images |
| | 65 | off=`$binoffset "$image" $GZHDR1 2>/dev/null` |
| | 66 | [ "$?" != "0" ] && off="-1" |
| | 67 | if [ "$off" -eq "-1" ]; then |
| | 68 | off=`$binoffset "$image" $GZHDR2 2>/dev/null` |
| | 69 | [ "$?" != "0" ] && off="-1" |
| | 70 | fi |
| | 71 | if [ "$off" -eq "0" ]; then |
| | 72 | zcat <"$image" >"$TMPFILE" |
| | 73 | dump_config "$TMPFILE" |
| | 74 | elif [ "$off" -ne "-1" ]; then |
| | 75 | (dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \ |
| | 76 | zcat >"$TMPFILE" |
| | 77 | dump_config "$TMPFILE" |
| | 78 | |
| | 79 | # check if this is simply an ELF file |
| | 80 | else |
| | 81 | off=`$binoffset "$image" $ELFHDR 2>/dev/null` |
| | 82 | [ "$?" != "0" ] && off="-1" |
| | 83 | if [ "$off" -eq "0" ]; then |
| | 84 | dump_config "$image" |
| | 85 | fi |
| | 86 | fi |
| | 87 | |
| | 88 | echo "ERROR: Unable to extract kernel configuration information." |
| | 89 | echo " This kernel image may not have the config info." |
| | 90 | |
| | 91 | clean_up |
| | 92 | exit 1 |
projects / linux-2.6-block.git / blame_incremental