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authorRabin Vincent <rabin@rab.in>2010-01-05 20:27:58 +0530
committerMichal Marek <mmarek@suse.cz>2010-02-02 14:33:54 +0100
commit5358db0b0e16470337c6ec08177deb3f68ed7673 (patch)
tree02eb5cb3a1d93b80b5db7ab2338822b272f84a84 /scripts/decodecode
parent84336466011c589b6af554f2f2f1fcfa1a5c1437 (diff)
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scripts: add ARM support to decodecode
This patch adds support for decoding ARM oopses to scripts/decodecode. The following things are handled: - ARCH and CROSS_COMPILE environment variables are respected. - The Code: in x86 oopses is in bytes, while it is in either words (4 bytes) or halfwords for ARM. - Some versions of ARM objdump refuse to disassemble instructions generated by literal constants (".word 0x..."). The workaround is to strip the object file first. - The faulting instruction is marked (liked so) in ARM, but <like so> in x86. - ARM mnemonics may include characters such as [] which need to be escaped before being passed to sed for the "<- trapping instruction" substitution. Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/decodecode')
-rwxr-xr-xscripts/decodecode48
1 files changed, 35 insertions, 13 deletions
diff --git a/scripts/decodecode b/scripts/decodecode
index 4b00647814bc..8b30cc36744f 100755
--- a/scripts/decodecode
+++ b/scripts/decodecode
@@ -7,7 +7,7 @@
# AFLAGS=--32 decodecode < 386.oops
cleanup() {
- rm -f $T $T.s $T.o $T.oo $T.aa $T.aaa
+ rm -f $T $T.s $T.o $T.oo $T.aa $T.dis
exit 1
}
@@ -39,6 +39,29 @@ fi
echo $code
code=`echo $code | sed -e 's/.*Code: //'`
+width=`expr index "$code" ' '`
+width=$[($width-1)/2]
+case $width in
+1) type=byte ;;
+2) type=2byte ;;
+4) type=4byte ;;
+esac
+
+disas() {
+ ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s &> /dev/null
+
+ if [ "$ARCH" == "arm" ]; then
+ if [ $width == 2 ]; then
+ OBJDUMPFLAGS="-M force-thumb"
+ fi
+
+ ${CROSS_COMPILE}strip $1.o
+ fi
+
+ ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \
+ grep -v "/tmp\|Disassembly\|\.text\|^$" &> $1.dis
+}
+
marker=`expr index "$code" "\<"`
if [ $marker -eq 0 ]; then
marker=`expr index "$code" "\("`
@@ -49,26 +72,25 @@ 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 $T.ooo
+ echo -n " .$type 0x" > $T.s
+ echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s
+ disas $T
+ cat $T.dis >> $T.oo
+ rm -f $T.o $T.s $T.dis
# and fix code at-and-after marker
code=`echo "$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
+code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'`
+echo -n " .$type 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
+disas $T
+cat $T.dis >> $T.aa
-faultline=`cat $T.aaa | head -1 | cut -d":" -f2`
+faultline=`cat $T.dis | head -1 | cut -d":" -f2`
+faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'`
cat $T.oo | sed -e "s/\($faultline\)/\*\1 <-- trapping instruction/g"
echo