markup_oops.pl: add options to improve cross-sompilation environments

The markup_oops.pl have 3 troubles to support cross-compiler environment:
1.  It use objdump directly.
2.  It use modinfo to get the message of module.
3.  It use hex function that cannot support 64-bit number in 32-bit arch.

This patch add 3 options to markup_oops.pl:
1. -c CROSS_COMPILE	Specify the prefix used for toolchain.
2. -m MODULE_DIRNAME	Specify the module directory name.
3. Change hex function to Math::BigInt->from_hex.

After this patch, parse the x8664 oops in x86, we can:
cat amd64m | perl ~/kernel/tmp/m.pl -c /home/teawater/kernel/bin/x8664- -m ./e.ko vmlinux

Thanks,
Hui

Signed-off-by: Hui Zhu <teawater@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: ozan@pardus.org.tr
Cc: Matthew Wilcox <willy@linux.intel.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 36 insertions, 13 deletions

diff --git a/scripts/markup_oops.pl b/scripts/markup_oops.pl
index 4a95539c807a..a7e8e019e03d 100644
--- a/scripts/markup_oops.pl
+++ b/scripts/markup_oops.pl
@@ -2,6 +2,7 @@
 
 use File::Basename;
 use Math::BigInt;
+use Getopt::Long;
 
 # Copyright 2008, Intel Corporation
 #
@@ -15,7 +16,17 @@ use Math::BigInt;
 #       Arjan van de Ven <arjan@linux.intel.com>
 
 
-my $vmlinux_name = $ARGV[0];
+my $cross_compile = "";
+my $vmlinux_name = "";
+my $modulefile = "";
+
+# Get options
+Getopt::Long::GetOptions(
+        'cross-compile|c=s'     => \$cross_compile,
+        'module|m=s'    => \$modulefile,
+        'help|h'                => \&usage,
+);
+my $vmlinux_name = $ARGV[$#ARGV];
 if (!defined($vmlinux_name)) {
         my $kerver = `uname -r`;
         chomp($kerver);
@@ -23,9 +34,8 @@ if (!defined($vmlinux_name)) {
         print "No vmlinux specified, assuming $vmlinux_name\n";
 }
 my $filename = $vmlinux_name;
-#
-# Step 1: Parse the oops to find the EIP value
-#
+
+# Parse the oops to find the EIP value
 
 my $target = "0";
 my $function;
@@ -177,26 +187,26 @@ my $decodestart = Math::BigInt->from_hex("0x$target") - Math::BigInt->from_hex("
 my $decodestop = Math::BigInt->from_hex("0x$target") + 8192;
 if ($target eq "0") {
         print "No oops found!\n";
-        print "Usage: \n";
-        print "    dmesg | perl scripts/markup_oops.pl vmlinux\n";
-        exit;
+        usage();
 }
 
 # if it's a module, we need to find the .ko file and calculate a load offset
 if ($module ne "") {
-        my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`;
-        chomp($modulefile);
+        if ($modulefile eq "") {
+                my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`;
+                chomp($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";
+        open(FILE, $cross_compile."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);
+                        $vmaoffset = Math::BigInt->from_hex("0x$target") - Math::BigInt->from_hex("0x$fu") - Math::BigInt->from_hex("0x$func_offset");
                 }
         }
         close(FILE);
@@ -212,7 +222,7 @@ sub InRange {
         my ($address, $target) = @_;
         my $ad = "0x".$address;
         my $ta = "0x".$target;
-        my $delta = hex($ad) - hex($ta);
+        my $delta = Math::BigInt->from_hex($ad) - Math::BigInt->from_hex($ta);
 
         if (($delta > -4096) && ($delta < 4096)) {
                 return 1;
@@ -225,7 +235,7 @@ 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
 
-open(FILE, "objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
+open(FILE, $cross_compile."objdump -dS --adjust-vma=$vmaoffset --start-address=$decodestart --stop-address=$decodestop $filename |") || die "Cannot start objdump";
 
 while (<FILE>) {
         my $line = $_;
@@ -345,3 +355,16 @@ while ($i < $finish) {
         $i = $i +1;
 }
 
+sub usage {
+        print <<EOT;
+Usage:
+  dmesg | perl $0 [OPTION] [VMLINUX]
+
+OPTION:
+  -c, --cross-compile CROSS_COMPILE     Specify the prefix used for toolchain.
+  -m, --module MODULE_DIRNAME           Specify the module directory name.
+  -h, --help                            Help.
+EOT
+        exit;
+}
+