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@@ -0,0 +1,125 @@
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+#!/bin/sh
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+# SPDX-License-Identifier: GPL-2.0
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+# Disassemble the Code: line in Linux oopses
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+# usage: decodecode < oops.file
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+#
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+# options: set env. variable AFLAGS=options to pass options to "as";
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+# e.g., to decode an i386 oops on an x86_64 system, use:
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+# AFLAGS=--32 decodecode < 386.oops
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+
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+cleanup() {
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+ rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
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+ exit 1
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+}
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+
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+die() {
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+ echo "$@"
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+ exit 1
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+}
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+
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+trap cleanup EXIT
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+
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+T=`mktemp` || die "cannot create temp file"
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+code=
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+cont=
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+
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+while read i ; do
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+
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+case "$i" in
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+*Code:*)
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+ code=$i
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+ cont=yes
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+ ;;
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+*)
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+ [ -n "$cont" ] && {
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+ xdump="$(echo $i | grep '^[[:xdigit:]<>[:space:]]\+$')"
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+ if [ -n "$xdump" ]; then
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+ code="$code $xdump"
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+ else
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+ cont=
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+ fi
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+ }
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+ ;;
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+esac
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+
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+done
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+
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+if [ -z "$code" ]; then
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+ rm $T
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+ exit
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+fi
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+
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+echo $code
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+code=`echo $code | sed -e 's/.*Code: //'`
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+
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+width=`expr index "$code" ' '`
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+width=$((($width-1)/2))
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+case $width in
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+1) type=byte ;;
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+2) type=2byte ;;
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+4) type=4byte ;;
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+esac
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+
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+disas() {
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+ ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1
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+
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+ if [ "$ARCH" = "arm" ]; then
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+ if [ $width -eq 2 ]; then
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+ OBJDUMPFLAGS="-M force-thumb"
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+ fi
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+
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+ ${CROSS_COMPILE}strip $1.o
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+ fi
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+
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+ if [ "$ARCH" = "arm64" ]; then
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+ if [ $width -eq 4 ]; then
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+ type=inst
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+ fi
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+
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+ ${CROSS_COMPILE}strip $1.o
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+ fi
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+
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+ ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
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+ grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1
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+}
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+
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+marker=`expr index "$code" "\<"`
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+if [ $marker -eq 0 ]; then
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+ marker=`expr index "$code" "\("`
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+fi
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+
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+touch $T.oo
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+if [ $marker -ne 0 ]; then
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+ echo All code >> $T.oo
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+ echo ======== >> $T.oo
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+ beforemark=`echo "$code"`
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+ echo -n " .$type 0x" > $T.s
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+ echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
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+ disas $T
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+ cat $T.dis >> $T.oo
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+ rm -f $T.o $T.s $T.dis
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+
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+# and fix code at-and-after marker
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+ code=`echo "$code" | cut -c$((${marker} + 1))-`
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+fi
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+echo Code starting with the faulting instruction > $T.aa
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+echo =========================================== >> $T.aa
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+code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
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+echo -n " .$type 0x" > $T.s
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+echo $code >> $T.s
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+disas $T
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+cat $T.dis >> $T.aa
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+
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+# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
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+# i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
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+# special)
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+faultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \
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+ $(wc -l $T.aa | cut -d" " -f1) + 3))
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+
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+faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
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+faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
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+
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+cat $T.oo | sed -e "${faultlinenum}s/^\(.*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"
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+echo
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+cat $T.aa
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+cleanup
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