#!/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