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
=$
((($width-1)/2))
63 if [ -z "$ARCH" ]; then
65 aarch64
*) ARCH
=arm64
;;
71 ${CROSS_COMPILE}as
$AFLAGS -o $1.o
$1.s
> /dev
/null
2>&1
73 if [ "$ARCH" = "arm" ]; then
74 if [ $width -eq 2 ]; then
75 OBJDUMPFLAGS
="-M force-thumb"
78 ${CROSS_COMPILE}strip
$1.o
81 if [ "$ARCH" = "arm64" ]; then
82 if [ $width -eq 4 ]; then
86 ${CROSS_COMPILE}strip
$1.o
89 ${CROSS_COMPILE}objdump
$OBJDUMPFLAGS -S $1.o | \
90 grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis
2>&1
93 marker
=`expr index "$code" "\<"`
94 if [ $marker -eq 0 ]; then
95 marker
=`expr index "$code" "\("`
99 if [ $marker -ne 0 ]; then
100 echo All code
>> $T.oo
101 echo ======== >> $T.oo
102 beforemark
=`echo "$code"`
103 echo -n " .$type 0x" > $T.s
104 echo $beforemark |
sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
107 rm -f $T.o
$T.s
$T.dis
109 # and fix code at-and-after marker
110 code
=`echo "$code" | cut -c$((${marker} + 1))-`
112 echo Code starting with the faulting instruction
> $T.aa
113 echo =========================================== >> $T.aa
114 code
=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
115 echo -n " .$type 0x" > $T.s
120 # (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
121 # i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
123 faultlinenum
=$
(( $
(wc -l $T.oo | cut
-d" " -f1) - \
124 $
(wc -l $T.aa | cut
-d" " -f1) + 3))
126 faultline
=`cat $T.dis | head -1 | cut -d":" -f2-`
127 faultline
=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
129 cat $T.oo |
sed -e "${faultlinenum}s/^\([^:]*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"