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If opps.file is in DOS format, faulting instruction cannot be printed:
/ # ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
/ # ./scripts/decodecode < oops.file
[ 0.734345] Code: d0002881 912f9c21 94067e68 d2800001 (b900003f)
aarch64-linux-gnu-strip: '/tmp/tmp.5Y9eybnnSi.o': No such file
aarch64-linux-gnu-objdump: '/tmp/tmp.5Y9eybnnSi.o': No such file
All code
========
0: d0002881 adrp x1, 0x512000
4: 912f9c21 add x1, x1, #0xbe7
8: 94067e68 bl 0x19f9a8
c: d2800001 mov x1, #0x0 // #0
10: b900003f str wzr, [x1]
Code starting with the faulting instruction
===========================================
Background: The compilation environment is Ubuntu, and the test
environment is Windows. Most logs are generated in the Windows
environment. In this way, CR (carriage return) will inevitably appear,
which will affect the use of decodecode in the Ubuntu environment.
The repaired effect is as follows:
/ # ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
/ # ./scripts/decodecode < oops.file
[ 0.734345] Code: d0002881 912f9c21 94067e68 d2800001 (b900003f)
All code
========
0: d0002881 adrp x1, 0x512000
4: 912f9c21 add x1, x1, #0xbe7
8: 94067e68 bl 0x19f9a8
c: d2800001 mov x1, #0x0 // #0
10:* b900003f str wzr, [x1] <-- trapping instruction
Code starting with the faulting instruction
===========================================
0: b900003f str wzr, [x1]
Link: https://lkml.kernel.org/r/20211008064712.926-1-weidonghui@allwinnertech.com
Signed-off-by: weidonghui <weidonghui@allwinnertech.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Marc Zyngier <maz@misterjones.org>
Cc: Will Deacon <will@kernel.org>
Cc: Rabin Vincent <rabin@rab.in>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
148 lines
2.9 KiB
Bash
Executable File
148 lines
2.9 KiB
Bash
Executable File
#!/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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# PC=hex - the PC (program counter) the oops points to
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cleanup() {
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rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
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exit 1
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}
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die() {
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echo "$@"
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exit 1
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}
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trap cleanup EXIT
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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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while read i ; do
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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 $xdump"
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else
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cont=
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fi
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}
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;;
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esac
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done
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if [ -z "$code" ]; then
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rm $T
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exit
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fi
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echo $code
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code=`echo $code | sed -e 's/.*Code: //'`
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width=`expr index "$code" ' '`
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width=$((($width-1)/2))
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case $width in
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1) type=byte ;;
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2) type=2byte ;;
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4) type=4byte ;;
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esac
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if [ -z "$ARCH" ]; then
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case `uname -m` in
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aarch64*) ARCH=arm64 ;;
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arm*) ARCH=arm ;;
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esac
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fi
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# Params: (tmp_file, pc_sub)
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disas() {
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t=$1
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pc_sub=$2
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${CROSS_COMPILE}as $AFLAGS -o $t.o $t.s > /dev/null 2>&1
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if [ "$ARCH" = "arm" ]; then
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if [ $width -eq 2 ]; then
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OBJDUMPFLAGS="-M force-thumb"
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fi
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${CROSS_COMPILE}strip $t.o
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fi
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if [ "$ARCH" = "arm64" ]; then
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if [ $width -eq 4 ]; then
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type=inst
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fi
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${CROSS_COMPILE}strip $t.o
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fi
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if [ $pc_sub -ne 0 ]; then
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if [ $PC ]; then
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adj_vma=$(( $PC - $pc_sub ))
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OBJDUMPFLAGS="$OBJDUMPFLAGS --adjust-vma=$adj_vma"
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fi
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fi
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${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $t.o | \
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grep -v "/tmp\|Disassembly\|\.text\|^$" > $t.dis 2>&1
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}
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marker=`expr index "$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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touch $T.oo
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if [ $marker -ne 0 ]; then
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# 2 opcode bytes and a single space
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pc_sub=$(( $marker / 3 ))
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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 $pc_sub
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cat $T.dis >> $T.oo
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rm -f $T.o $T.s $T.dis
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# and fix code at-and-after marker
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code=`echo "$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 $code | sed -e 's/\r//;s/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
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echo -n " .$type 0x" > $T.s
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echo $code >> $T.s
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disas $T 0
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cat $T.dis >> $T.aa
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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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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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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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