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authorRandy Dunlap <randy.dunlap@oracle.com>2007-07-16 02:41:15 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 12:05:48 -0400
commitdcecc6c70013e3a5fa81b3081480c03e10670a23 (patch)
treea45c6a35538004732ea4ce130f9fa5db5f8a1bf6 /scripts
parent213dd266d48af90c1eec8688c1ff31aa34d21de2 (diff)
doc/oops-tracing: add Code: decode info
Add info that the Code: bytes line contains <xy> or (wxyz) in some architecture oops reports and what that means. Add a script by Andi Kleen that reads the Code: line from an Oops report file and generates assembly code from the hex bytes. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/decodecode51
1 files changed, 51 insertions, 0 deletions
diff --git a/scripts/decodecode b/scripts/decodecode
new file mode 100644
index 000000000000..1e1a8f620c47
--- /dev/null
+++ b/scripts/decodecode
@@ -0,0 +1,51 @@
1#!/bin/sh
2# Disassemble the Code: line in Linux oopses
3# usage: decodecode < oops.file
4#
5# options: set env. variable AFLAGS=options to pass options to "as";
6# e.g., to decode an i386 oops on an x86_64 system, use:
7# AFLAGS=--32 decodecode < 386.oops
8
9T=`mktemp`
10code=
11
12while read i ; do
13
14case "$i" in
15*Code:*)
16 code=$i
17 ;;
18esac
19
20done
21
22if [ -z "$code" ]; then
23 exit
24fi
25
26echo $code
27code=`echo $code | sed -e 's/.*Code: //'`
28
29marker=`expr index "$code" "\<"`
30if [ $marker -eq 0 ]; then
31 marker=`expr index "$code" "\("`
32fi
33
34if [ $marker -ne 0 ]; then
35 beforemark=`echo "$code" | cut -c-$((${marker} - 1))`
36 echo -n " .byte 0x" > $T.s
37 echo $beforemark | sed -e 's/ /,0x/g' >> $T.s
38 as $AFLAGS -o $T.o $T.s
39 objdump -S $T.o
40 rm $T.o $T.s
41
42# and fix code at-and-after marker
43 code=`echo "$code" | cut -c$((${marker} + 1))-`
44fi
45
46code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g'`
47echo -n " .byte 0x" > $T.s
48echo $code >> $T.s
49as $AFLAGS -o $T.o $T.s
50objdump -S $T.o
51rm $T.o $T.s