2 # Disassemble the Code: line in Linux oopses
3 # usage: decodecode < oops.file
5 # options: set env. variable AFLAGS=options to pass options to "as";
6 # e.g., to decode an i386 oops on an x86_64 system, use:
7 # AFLAGS=--32 decodecode < 386.oops
10 rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
21 T=`mktemp` || die "cannot create temp file"
34 if [ -z "$code" ]; then
40 code=`echo $code | sed -e 's/.*Code: //'`
42 width=`expr index "$code" ' '`
43 width=$((($width-1)/2))
51 ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1
53 if [ "$ARCH" = "arm" ]; then
54 if [ $width -eq 2 ]; then
55 OBJDUMPFLAGS="-M force-thumb"
58 ${CROSS_COMPILE}strip $1.o
61 ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
62 grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1
65 marker=`expr index "$code" "\<"`
66 if [ $marker -eq 0 ]; then
67 marker=`expr index "$code" "\("`
71 if [ $marker -ne 0 ]; then
72 echo All code >> $T.oo
73 echo ======== >> $T.oo
74 beforemark=`echo "$code"`
75 echo -n " .$type 0x" > $T.s
76 echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
79 rm -f $T.o $T.s $T.dis
81 # and fix code at-and-after marker
82 code=`echo "$code" | cut -c$((${marker} + 1))-`
84 echo Code starting with the faulting instruction > $T.aa
85 echo =========================================== >> $T.aa
86 code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
87 echo -n " .$type 0x" > $T.s
92 faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
93 faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
95 cat $T.oo | sed -e "s/\($faultline\)/\*\1 <-- trapping instruction/g"