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- #!/bin/sh
- # Disassemble the Code: line in Linux oopses
- # usage: decodecode < oops.file
- #
- # options: set env. variable AFLAGS=options to pass options to "as";
- # e.g., to decode an i386 oops on an x86_64 system, use:
- # AFLAGS=--32 decodecode < 386.oops
-
- cleanup() {
- rm -f $T $T.s $T.o $T.oo $T.aa $T.aaa
- exit 1
- }
-
- die() {
- echo "$@"
- exit 1
- }
-
- trap cleanup EXIT
-
- T=`mktemp` || die "cannot create temp file"
- code=
-
- while read i ; do
-
- case "$i" in
- *Code:*)
- code=$i
- ;;
- esac
-
- done
-
- if [ -z "$code" ]; then
- rm $T
- exit
- fi
-
- echo $code
- code=`echo $code | sed -e 's/.*Code: //'`
-
- marker=`expr index "$code" "\<"`
- if [ $marker -eq 0 ]; then
- marker=`expr index "$code" "\("`
- fi
-
- touch $T.oo
- if [ $marker -ne 0 ]; then
- echo All code >> $T.oo
- echo ======== >> $T.oo
- beforemark=`echo "$code"`
- echo -n " .byte 0x" > $T.s
- echo $beforemark | sed -e 's/ /,0x/g' | sed -e 's/<//g' | sed -e 's/>//g' >> $T.s
- as $AFLAGS -o $T.o $T.s &> /dev/null
- objdump -S $T.o | grep -v "/tmp" | grep -v "Disassembly" | grep -v "\.text" | grep -v "^$" &> $T.ooo
- cat $T.ooo >> $T.oo
- rm -f $T.o $T.s $T.ooo
-
- # and fix code at-and-after marker
- code=`echo "$code" | cut -c$((${marker} + 1))-`
- fi
- echo Code starting with the faulting instruction > $T.aa
- echo =========================================== >> $T.aa
- code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g'`
- echo -n " .byte 0x" > $T.s
- echo $code >> $T.s
- as $AFLAGS -o $T.o $T.s &> /dev/null
- objdump -S $T.o | grep -v "Disassembly" | grep -v "/tmp" | grep -v "\.text" | grep -v "^$" &> $T.aaa
- cat $T.aaa >> $T.aa
-
- faultline=`cat $T.aaa | head -1 | cut -d":" -f2`
-
- cat $T.oo | sed -e "s/\($faultline\)/\*\1 <-- trapping instruction/g"
- echo
- cat $T.aa
- cleanup
-