scripts: improve the decodecode script
PATCH 6/8 scripts: improve the decodecode script
From: Arjan van de Ven <[email protected]>
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 <[email protected]>
Reviewed-by WANG Cong <[email protected]>
Cc Sam Ravnborg <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
---
scripts/decodecode | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-)
scripts/decodecode renamed from scripts/decodecode~scripts-improve-the-decodecode-script +22 -10
@@ -7,7 +7,7 @@ # AFLAGS=--32 decodecode < 386.oops cleanup() { - rm -f $T $T.s $T.o + rm -f $T $T.s $T.o $T.oo $T.aa $T.aaa exit 1 }
@@ -44,21 +44,33 @@ if [ $marker -eq 0 ]; then marker=`expr index "$code" "\("` fi +touch $T.oo if [ $marker -ne 0 ]; then - beforemark=`echo "$code" | cut -c-$((${marker} - 1))` + echo All code >> $T.oo + echo ======== >> $T.oo + beforemark=`echo "$code"` echo -n " .byte 0x" > $T.s - echo $beforemark | sed -e 's/ /,0x/g' >> $T.s - as $AFLAGS -o $T.o $T.s - objdump -S $T.o - rm $T.o $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 -objdump -S $T.o -rm $T $T.s $T.o +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
_
Sam Ravnborg
AppliedQuoted 17 lines · On Mon, Dec 01, 2008 at 02:21:06PM -0800, [email protected] wrote:
From: Arjan van de Ven <[email protected]>
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)
Quoted 6 lines
this patch updates the kernel copy to also have this functionality.
Signed-off-by Arjan van de Ven <[email protected]>Reviewed-by WANG Cong <[email protected]>Cc Sam Ravnborg <[email protected]>Signed-off-by Andrew Morton <[email protected]>
Applied.
Sam