mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
846442c8dd
kerneloops.org has been using an improved "decodecode" script, specifically it has a special marker that shows which line in the assembly the oops happened at, like this: 20: 83 e0 03 and $0x3,%eax 23: 09 d8 or %ebx,%eax 25: 85 db test %ebx,%ebx 27: 89 02 mov %eax,(%edx) 29: 74 0f je 0x3a 2b:* 3b 73 04 cmp 0x4(%ebx),%esi <-- trapping instruction 2e: 75 05 jne 0x35 30: 89 53 04 mov %edx,0x4(%ebx) 33: eb 07 jmp 0x3c 35: 89 53 08 mov %edx,0x8(%ebx) this patch updates the kernel copy to also have this functionality. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Reviewed-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
77 lines
1.7 KiB
Bash
Executable File
77 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
|
|
# Disassemble the Code: line in Linux oopses
|
|
# usage: decodecode < oops.file
|
|
#
|
|
# options: set env. variable AFLAGS=options to pass options to "as";
|
|
# e.g., to decode an i386 oops on an x86_64 system, use:
|
|
# AFLAGS=--32 decodecode < 386.oops
|
|
|
|
cleanup() {
|
|
rm -f $T $T.s $T.o $T.oo $T.aa $T.aaa
|
|
exit 1
|
|
}
|
|
|
|
die() {
|
|
echo "$@"
|
|
exit 1
|
|
}
|
|
|
|
trap cleanup EXIT
|
|
|
|
T=`mktemp` || die "cannot create temp file"
|
|
code=
|
|
|
|
while read i ; do
|
|
|
|
case "$i" in
|
|
*Code:*)
|
|
code=$i
|
|
;;
|
|
esac
|
|
|
|
done
|
|
|
|
if [ -z "$code" ]; then
|
|
rm $T
|
|
exit
|
|
fi
|
|
|
|
echo $code
|
|
code=`echo $code | sed -e 's/.*Code: //'`
|
|
|
|
marker=`expr index "$code" "\<"`
|
|
if [ $marker -eq 0 ]; then
|
|
marker=`expr index "$code" "\("`
|
|
fi
|
|
|
|
touch $T.oo
|
|
if [ $marker -ne 0 ]; then
|
|
echo All code >> $T.oo
|
|
echo ======== >> $T.oo
|
|
beforemark=`echo "$code"`
|
|
echo -n " .byte 0x" > $T.s
|
|
echo $beforemark | sed -e 's/ /,0x/g' | sed -e 's/<//g' | sed -e 's/>//g' >> $T.s
|
|
as $AFLAGS -o $T.o $T.s &> /dev/null
|
|
objdump -S $T.o | grep -v "/tmp" | grep -v "Disassembly" | grep -v "\.text" | grep -v "^$" &> $T.ooo
|
|
cat $T.ooo >> $T.oo
|
|
rm -f $T.o $T.s $T.ooo
|
|
|
|
# and fix code at-and-after marker
|
|
code=`echo "$code" | cut -c$((${marker} + 1))-`
|
|
fi
|
|
echo Code starting with the faulting instruction > $T.aa
|
|
echo =========================================== >> $T.aa
|
|
code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g'`
|
|
echo -n " .byte 0x" > $T.s
|
|
echo $code >> $T.s
|
|
as $AFLAGS -o $T.o $T.s &> /dev/null
|
|
objdump -S $T.o | grep -v "Disassembly" | grep -v "/tmp" | grep -v "\.text" | grep -v "^$" &> $T.aaa
|
|
cat $T.aaa >> $T.aa
|
|
|
|
faultline=`cat $T.aaa | head -1 | cut -d":" -f2`
|
|
|
|
cat $T.oo | sed -e "s/\($faultline\)/\*\1 <-- trapping instruction/g"
|
|
echo
|
|
cat $T.aa
|
|
cleanup
|