1#!/bin/sh
  2# SPDX-License-Identifier: GPL-2.0
  3# Disassemble the Code: line in Linux oopses
  4# usage: decodecode < oops.file
  5#
  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
  9
 10cleanup() {
 11	rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
 12	exit 1
 13}
 14
 15die() {
 16	echo "$@"
 17	exit 1
 18}
 19
 20trap cleanup EXIT
 21
 22T=`mktemp` || die "cannot create temp file"
 23code=
 24cont=
 25
 26while read i ; do
 27
 28case "$i" in
 29*Code:*)
 30	code=$i
 31	cont=yes
 32	;;
 33*)
 34	[ -n "$cont" ] && {
 35		xdump="$(echo $i | grep '^[[:xdigit:]<>[:space:]]\+$')"
 36		if [ -n "$xdump" ]; then
 37			code="$code $xdump"
 38		else
 39			cont=
 40		fi
 41	}
 42	;;
 43esac
 44
 45done
 46
 47if [ -z "$code" ]; then
 48	rm $T
 49	exit
 50fi
 51
 52echo $code
 53code=`echo $code | sed -e 's/.*Code: //'`
 54
 55width=`expr index "$code" ' '`
 56width=$((($width-1)/2))
 57case $width in
 581) type=byte ;;
 592) type=2byte ;;
 604) type=4byte ;;
 61esac
 62
 63if [ -z "$ARCH" ]; then
 64    case `uname -m` in
 65	aarch64*) ARCH=arm64 ;;
 66	arm*) ARCH=arm ;;
 67    esac
 68fi
 69
 70disas() {
 71	${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1
 72
 73	if [ "$ARCH" = "arm" ]; then
 74		if [ $width -eq 2 ]; then
 75			OBJDUMPFLAGS="-M force-thumb"
 76		fi
 77
 78		${CROSS_COMPILE}strip $1.o
 79	fi
 80
 81	if [ "$ARCH" = "arm64" ]; then
 82		if [ $width -eq 4 ]; then
 83			type=inst
 84		fi
 85
 86		${CROSS_COMPILE}strip $1.o
 87	fi
 88
 89	${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
 90		grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1
 91}
 92
 93marker=`expr index "$code" "\<"`
 94if [ $marker -eq 0 ]; then
 95	marker=`expr index "$code" "\("`
 96fi
 97
 98touch $T.oo
 99if [ $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
105	disas $T
106	cat $T.dis >> $T.oo
107	rm -f $T.o $T.s $T.dis
108
109# and fix code at-and-after marker
110	code=`echo "$code" | cut -c$((${marker} + 1))-`
111fi
112echo Code starting with the faulting instruction  > $T.aa
113echo =========================================== >> $T.aa
114code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
115echo -n "	.$type 0x" > $T.s
116echo $code >> $T.s
117disas $T
118cat $T.dis >> $T.aa
119
120# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
121# i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
122# special)
123faultlinenum=$(( $(wc -l $T.oo  | cut -d" " -f1) - \
124		 $(wc -l $T.aa  | cut -d" " -f1) + 3))
125
126faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
127faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
128
129cat $T.oo | sed -e "${faultlinenum}s/^\(.*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"
130echo
131cat $T.aa
132cleanup

  1#!/bin/sh
 
  2# Disassemble the Code: line in Linux oopses
  3# usage: decodecode < oops.file
  4#
  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
  8
  9cleanup() {
 10	rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
 11	exit 1
 12}
 13
 14die() {
 15	echo "$@"
 16	exit 1
 17}
 18
 19trap cleanup EXIT
 20
 21T=`mktemp` || die "cannot create temp file"
 22code=
 
 23
 24while read i ; do
 25
 26case "$i" in
 27*Code:*)
 28	code=$i
 
 
 
 
 
 
 
 
 
 
 
 29	;;
 30esac
 31
 32done
 33
 34if [ -z "$code" ]; then
 35	rm $T
 36	exit
 37fi
 38
 39echo $code
 40code=`echo $code | sed -e 's/.*Code: //'`
 41
 42width=`expr index "$code" ' '`
 43width=$((($width-1)/2))
 44case $width in
 451) type=byte ;;
 462) type=2byte ;;
 474) type=4byte ;;
 48esac
 49
 
 
 
 
 
 
 
 50disas() {
 51	${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1
 52
 53	if [ "$ARCH" = "arm" ]; then
 54		if [ $width -eq 2 ]; then
 55			OBJDUMPFLAGS="-M force-thumb"
 
 
 
 
 
 
 
 
 56		fi
 57
 58		${CROSS_COMPILE}strip $1.o
 59	fi
 60
 61	${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
 62		grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1
 63}
 64
 65marker=`expr index "$code" "\<"`
 66if [ $marker -eq 0 ]; then
 67	marker=`expr index "$code" "\("`
 68fi
 69
 70touch $T.oo
 71if [ $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
 77	disas $T
 78	cat $T.dis >> $T.oo
 79	rm -f $T.o $T.s $T.dis
 80
 81# and fix code at-and-after marker
 82	code=`echo "$code" | cut -c$((${marker} + 1))-`
 83fi
 84echo Code starting with the faulting instruction  > $T.aa
 85echo =========================================== >> $T.aa
 86code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
 87echo -n "	.$type 0x" > $T.s
 88echo $code >> $T.s
 89disas $T
 90cat $T.dis >> $T.aa
 91
 92# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3,
 93# i.e. the title + the "===..=" line (sed is counting from 1, 0 address is
 94# special)
 95faultlinenum=$(( $(wc -l $T.oo  | cut -d" " -f1) - \
 96		 $(wc -l $T.aa  | cut -d" " -f1) + 3))
 97
 98faultline=`cat $T.dis | head -1 | cut -d":" -f2-`
 99faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
100
101cat $T.oo | sed -e "${faultlinenum}s/^\(.*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/"
102echo
103cat $T.aa
104cleanup