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script: improve markup_oops.pl to also decode oopses in modules

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There has been some light flamewar on lkml about decoding oopses
in modules (as part of the crashdump flamewar).

Now this isn't rocket science, just the markup_oops.pl script
cheaped out and didn't handle modules. But really; a flamewar
all about that?? What happened to C++ in the kernel or reading
files from inside the kernel?

This patch adds module support to markup_oops.pl; it's not the
most pretty perl but it works for my testcases...

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arjan van de Ven 2009-01-11 15:03:23 +00:00 committed by Linus Torvalds
parent 7df5231660
commit d32ad102c6
1 changed files with 51 additions and 10 deletions
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61
scripts/markup_oops.pl
View file

@ -1,5 +1,7 @@
#!/usr/bin/perl -w
use File::Basename;
# Copyright 2008, Intel Corporation
#
# This file is part of the Linux kernel
@ -13,23 +15,41 @@
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 $vmaoffset = 0;
while (<STDIN>) {
if ($_ =~ /EIP: 0060:\[\<([a-z0-9]+)\>\]/) {
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 = $3;
}
}
if ($target =~ /^f8/) {
print "This script does not work on modules ... \n";
exit;
}
my $decodestart = hex($target) - hex($func_offset);
my $decodestop = $decodestart + 8192;
if ($target eq "0") {
print "No oops found!\n";
print "Usage: \n";
@ -37,6 +57,29 @@ if ($target eq "0") {
exit;
}
# if it's a module, we need to find the .ko file and calculate a load offset
if ($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;
@ -59,9 +102,7 @@ sub InRange {
# first, parse the input into the lines array, but to keep size down,
# we only do this for 4Kb around the sweet spot
my $filename;
open(FILE, "objdump -dS $vmlinux_name |") || die "Cannot start objdump";
open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
while (<FILE>) {
my $line = $_;