diff options
Diffstat (limited to 'scripts/markup_oops.pl')
| -rw-r--r-- | scripts/markup_oops.pl | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/scripts/markup_oops.pl b/scripts/markup_oops.pl new file mode 100644 index 00000000000..d40449cafa8 --- /dev/null +++ b/scripts/markup_oops.pl @@ -0,0 +1,203 @@ +#!/usr/bin/perl -w + +use File::Basename; + +# Copyright 2008, Intel Corporation +# +# This file is part of the Linux kernel +# +# This program file is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; version 2 of the License. +# +# Authors: +# Arjan van de Ven <arjan@linux.intel.com> + + +my $vmlinux_name = $ARGV[0]; +if (!defined($vmlinux_name)) { + my $kerver = `uname -r`; + chomp($kerver); + $vmlinux_name = "/lib/modules/$kerver/build/vmlinux"; + print "No vmlinux specified, assuming $vmlinux_name\n"; +} +my $filename = $vmlinux_name; +# +# Step 1: Parse the oops to find the EIP value +# + +my $target = "0"; +my $function; +my $module = ""; +my $func_offset; +my $vmaoffset = 0; + +while (<STDIN>) { + my $line = $_; + if ($line =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) { + $target = $1; + } + if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) { + $function = $1; + $func_offset = $2; + } + + # check if it's a module + if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]+\W\[([a-zA-Z0-9\_\-]+)\]/) { + $module = $3; + } +} + +my $decodestart = hex($target) - hex($func_offset); +my $decodestop = $decodestart + 8192; +if ($target eq "0") { + print "No oops found!\n"; + print "Usage: \n"; + print " dmesg | perl scripts/markup_oops.pl vmlinux\n"; + exit; +} + +# if it's a module, we need to find the .ko file and calculate a load offset +if ($module ne "") { + my $dir = dirname($filename); + $dir = $dir . "/"; + my $mod = $module . ".ko"; + my $modulefile = `find $dir -name $mod | head -1`; + chomp($modulefile); + $filename = $modulefile; + if ($filename eq "") { + print "Module .ko file for $module not found. Aborting\n"; + exit; + } + # ok so we found the module, now we need to calculate the vma offset + open(FILE, "objdump -dS $filename |") || die "Cannot start objdump"; + while (<FILE>) { + if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) { + my $fu = $1; + $vmaoffset = hex($target) - hex($fu) - hex($func_offset); + } + } + close(FILE); +} + +my $counter = 0; +my $state = 0; +my $center = 0; +my @lines; + +sub InRange { + my ($address, $target) = @_; + my $ad = "0x".$address; + my $ta = "0x".$target; + my $delta = hex($ad) - hex($ta); + + if (($delta > -4096) && ($delta < 4096)) { + return 1; + } + return 0; +} + + + +# first, parse the input into the lines array, but to keep size down, +# we only do this for 4Kb around the sweet spot + +open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump"; + +while (<FILE>) { + my $line = $_; + chomp($line); + if ($state == 0) { + if ($line =~ /^([a-f0-9]+)\:/) { + if (InRange($1, $target)) { + $state = 1; + } + } + } else { + if ($line =~ /^([a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]+)\:/) { + my $val = $1; + if (!InRange($val, $target)) { + last; + } + if ($val eq $target) { + $center = $counter; + } + } + $lines[$counter] = $line; + + $counter = $counter + 1; + } +} + +close(FILE); + +if ($counter == 0) { + print "No matching code found \n"; + exit; +} + +if ($center == 0) { + print "No matching code found \n"; + exit; +} + +my $start; +my $finish; +my $codelines = 0; +my $binarylines = 0; +# now we go up and down in the array to find how much we want to print + +$start = $center; + +while ($start > 1) { + $start = $start - 1; + my $line = $lines[$start]; + if ($line =~ /^([a-f0-9]+)\:/) { + $binarylines = $binarylines + 1; + } else { + $codelines = $codelines + 1; + } + if ($codelines > 10) { + last; + } + if ($binarylines > 20) { + last; + } +} + + +$finish = $center; +$codelines = 0; +$binarylines = 0; +while ($finish < $counter) { + $finish = $finish + 1; + my $line = $lines[$finish]; + if ($line =~ /^([a-f0-9]+)\:/) { + $binarylines = $binarylines + 1; + } else { + $codelines = $codelines + 1; + } + if ($codelines > 10) { + last; + } + if ($binarylines > 20) { + last; + } +} + + +my $i; + +my $fulltext = ""; +$i = $start; +while ($i < $finish) { + if ($i == $center) { + $fulltext = $fulltext . "*$lines[$i] <----- faulting instruction\n"; + } else { + $fulltext = $fulltext . " $lines[$i]\n"; + } + $i = $i +1; +} + +print $fulltext; + |