1 files changed, 203 insertions, 0 deletions

diff --git a/scripts/markup_oops.pl b/scripts/markup_oops.pl
new file mode 100644
index 000000000000..d40449cafa84
--- /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;
+