2 # SPDX-License-Identifier: GPL-2.0
3 # Disassemble the Code: line in Linux oopses
4 # usage: decodecode < oops.file
6 # options: set env. variable AFLAGS=options to pass options to "as";
7 # e.g., to decode an i386 oops on an x86_64 system, use:
8 # AFLAGS=--32 decodecode < 386.oops
11 rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
22 T=`mktemp` || die "cannot create temp file"
35 xdump="$(echo $i | grep '^[[:xdigit:]<>[:space:]]\+$')"
36 if [ -n "$xdump" ]; then
47 if [ -z "$code" ]; then
53 code=`echo $code | sed -e 's/.*Code: //'`
55 width=`expr index "$code" ' '`
56 width=$((($width-1)/2))
64 ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1
66 if [ "$ARCH" = "arm" ]; then
67 if [ $width -eq 2 ]; then
68 OBJDUMPFLAGS="-M force-thumb"
71 ${CROSS_COMPILE}strip $1.o
74 if [ "$ARCH" = "arm64" ]; then
75 if [ $width -eq 4 ]; then
79 ${CROSS_COMPILE}strip $1.o
82 ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
83 grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1
86 marker=`expr index "$code" "\<"`
87 if [ $marker -eq 0 ]; then
88 marker=`expr index "$code" "\("`
92 if [ $marker -ne 0 ]; then
93 echo All code >> $T.oo
94 echo ======== >> $T.oo
95 beforemark=`echo "$code"`
96 echo -n " .$type 0x" > $T.s
97 echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
100 rm -f $T.o $T.s $T.dis
102 # and fix code at-and-after marker
103 code=`echo "$code" | cut -c$((${marker} + 1))-`
105 echo Code starting with the faulting instruction > $T.aa
106 echo =========================================== >> $T.aa
107 code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
108 echo -n " .$type 0x" > $T.s
113 # (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
114 # i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
116 faultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \
117 $(wc -l $T.aa | cut -d" " -f1) + 3))
119 faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
120 faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
122 cat $T.oo | sed -e "${faultlinenum}s/^\(.*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"