LXR linux/scripts/decodecode

   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
  52