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
   9 T=`mktemp`
  10 code=
  11
  12 while read i ; do
  13
  14 case "$i" in
  15 *Code:*)
  16         code=$i
  17         ;;
  18 esac
  19
  20 done
  21
  22 if [ -z "$code" ]; then
  23         exit
  24 fi
  25
  26 echo $code
  27 code=`echo $code | sed -e 's/.*Code: //'`
  28
  29 marker=`expr index "$code" "\<"`
  30 if [ $marker -eq 0 ]; then
  31         marker=`expr index "$code" "\("`
  32 fi
  33
  34 if [ $marker -ne 0 ]; then
  35         beforemark=`echo "$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))-`
  44 fi
  45
  46 code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g'`
  47 echo -n "       .byte 0x" > $T.s
  48 echo $code >> $T.s
  49 as $AFLAGS -o $T.o $T.s
  50 objdump -S $T.o
  51 rm $T.o $T.s