1dcecc6c7SRandy Dunlap#!/bin/sh 2*b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 3dcecc6c7SRandy Dunlap# Disassemble the Code: line in Linux oopses 4dcecc6c7SRandy Dunlap# usage: decodecode < oops.file 5dcecc6c7SRandy Dunlap# 6dcecc6c7SRandy Dunlap# options: set env. variable AFLAGS=options to pass options to "as"; 7dcecc6c7SRandy Dunlap# e.g., to decode an i386 oops on an x86_64 system, use: 8dcecc6c7SRandy Dunlap# AFLAGS=--32 decodecode < 386.oops 9dcecc6c7SRandy Dunlap 10fa220d89SRandy Dunlapcleanup() { 115358db0bSRabin Vincent rm -f $T $T.s $T.o $T.oo $T.aa $T.dis 12fa220d89SRandy Dunlap exit 1 13fa220d89SRandy Dunlap} 14fa220d89SRandy Dunlap 15fa220d89SRandy Dunlapdie() { 16fa220d89SRandy Dunlap echo "$@" 17fa220d89SRandy Dunlap exit 1 18fa220d89SRandy Dunlap} 19fa220d89SRandy Dunlap 20fa220d89SRandy Dunlaptrap cleanup EXIT 21fa220d89SRandy Dunlap 22fa220d89SRandy DunlapT=`mktemp` || die "cannot create temp file" 23dcecc6c7SRandy Dunlapcode= 24dcecc6c7SRandy Dunlap 25dcecc6c7SRandy Dunlapwhile read i ; do 26dcecc6c7SRandy Dunlap 27dcecc6c7SRandy Dunlapcase "$i" in 28dcecc6c7SRandy Dunlap*Code:*) 29dcecc6c7SRandy Dunlap code=$i 30dcecc6c7SRandy Dunlap ;; 31dcecc6c7SRandy Dunlapesac 32dcecc6c7SRandy Dunlap 33dcecc6c7SRandy Dunlapdone 34dcecc6c7SRandy Dunlap 35dcecc6c7SRandy Dunlapif [ -z "$code" ]; then 36fa220d89SRandy Dunlap rm $T 37dcecc6c7SRandy Dunlap exit 38dcecc6c7SRandy Dunlapfi 39dcecc6c7SRandy Dunlap 40dcecc6c7SRandy Dunlapecho $code 41dcecc6c7SRandy Dunlapcode=`echo $code | sed -e 's/.*Code: //'` 42dcecc6c7SRandy Dunlap 435358db0bSRabin Vincentwidth=`expr index "$code" ' '` 44b396aa03SRabin Vincentwidth=$((($width-1)/2)) 455358db0bSRabin Vincentcase $width in 465358db0bSRabin Vincent1) type=byte ;; 475358db0bSRabin Vincent2) type=2byte ;; 485358db0bSRabin Vincent4) type=4byte ;; 495358db0bSRabin Vincentesac 505358db0bSRabin Vincent 515358db0bSRabin Vincentdisas() { 52b396aa03SRabin Vincent ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1 535358db0bSRabin Vincent 54b396aa03SRabin Vincent if [ "$ARCH" = "arm" ]; then 55b396aa03SRabin Vincent if [ $width -eq 2 ]; then 565358db0bSRabin Vincent OBJDUMPFLAGS="-M force-thumb" 575358db0bSRabin Vincent fi 585358db0bSRabin Vincent 595358db0bSRabin Vincent ${CROSS_COMPILE}strip $1.o 605358db0bSRabin Vincent fi 615358db0bSRabin Vincent 625358db0bSRabin Vincent ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \ 63b396aa03SRabin Vincent grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1 645358db0bSRabin Vincent} 655358db0bSRabin Vincent 66dcecc6c7SRandy Dunlapmarker=`expr index "$code" "\<"` 67dcecc6c7SRandy Dunlapif [ $marker -eq 0 ]; then 68dcecc6c7SRandy Dunlap marker=`expr index "$code" "\("` 69dcecc6c7SRandy Dunlapfi 70dcecc6c7SRandy Dunlap 71846442c8SArjan van de Ventouch $T.oo 72dcecc6c7SRandy Dunlapif [ $marker -ne 0 ]; then 73846442c8SArjan van de Ven echo All code >> $T.oo 74846442c8SArjan van de Ven echo ======== >> $T.oo 75846442c8SArjan van de Ven beforemark=`echo "$code"` 765358db0bSRabin Vincent echo -n " .$type 0x" > $T.s 775358db0bSRabin Vincent echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s 785358db0bSRabin Vincent disas $T 795358db0bSRabin Vincent cat $T.dis >> $T.oo 805358db0bSRabin Vincent rm -f $T.o $T.s $T.dis 81dcecc6c7SRandy Dunlap 82dcecc6c7SRandy Dunlap# and fix code at-and-after marker 83dcecc6c7SRandy Dunlap code=`echo "$code" | cut -c$((${marker} + 1))-` 84dcecc6c7SRandy Dunlapfi 85846442c8SArjan van de Venecho Code starting with the faulting instruction > $T.aa 86846442c8SArjan van de Venecho =========================================== >> $T.aa 875358db0bSRabin Vincentcode=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'` 885358db0bSRabin Vincentecho -n " .$type 0x" > $T.s 89dcecc6c7SRandy Dunlapecho $code >> $T.s 905358db0bSRabin Vincentdisas $T 915358db0bSRabin Vincentcat $T.dis >> $T.aa 92846442c8SArjan van de Ven 9318ff44b1SBorislav Petkov# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3, 9418ff44b1SBorislav Petkov# i.e. the title + the "===..=" line (sed is counting from 1, 0 address is 9518ff44b1SBorislav Petkov# special) 9618ff44b1SBorislav Petkovfaultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \ 9718ff44b1SBorislav Petkov $(wc -l $T.aa | cut -d" " -f1) + 3)) 9818ff44b1SBorislav Petkov 992a95e37cSBorislav Petkovfaultline=`cat $T.dis | head -1 | cut -d":" -f2-` 1005358db0bSRabin Vincentfaultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'` 101846442c8SArjan van de Ven 10218ff44b1SBorislav Petkovcat $T.oo | sed -e "${faultlinenum}s/^\(.*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/" 103846442c8SArjan van de Venecho 104846442c8SArjan van de Vencat $T.aa 105846442c8SArjan van de Vencleanup 106