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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>
This commit is contained in:
Hui Zhu 2010-01-26 17:13:07 +08:00 committed by Michal Marek
parent d224a94ab9
commit 52e13e219d
1 changed files with 36 additions and 13 deletions
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49
scripts/markup_oops.pl
View File

@ -2,6 +2,7 @@
use File::Basename; use File::Basename;
use Math::BigInt; use Math::BigInt;
use Getopt::Long;
# Copyright 2008, Intel Corporation # Copyright 2008, Intel Corporation
# #
@ -15,7 +16,17 @@ use Math::BigInt;
# Arjan van de Ven <arjan@linux.intel.com> # 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($vmlinux_name)) { if (!defined($vmlinux_name)) {
my $kerver = `uname -r`; my $kerver = `uname -r`;
chomp($kerver); chomp($kerver);
@ -23,9 +34,8 @@ if (!defined($vmlinux_name)) {
print "No vmlinux specified, assuming $vmlinux_name\n"; print "No vmlinux specified, assuming $vmlinux_name\n";
} }
my $filename = $vmlinux_name; 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 $target = "0";
my $function; 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; my $decodestop = Math::BigInt->from_hex("0x$target") + 8192;
if ($target eq "0") { if ($target eq "0") {
print "No oops found!\n"; print "No oops found!\n";
print "Usage: \n"; usage();
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 it's a module, we need to find the .ko file and calculate a load offset
if ($module ne "") { if ($module ne "") {
my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`; if ($modulefile eq "") {
chomp($modulefile); my $modulefile = `modinfo $module | grep '^filename:' | awk '{ print \$2 }'`;
chomp($modulefile);
}
$filename = $modulefile; $filename = $modulefile;
if ($filename eq "") { if ($filename eq "") {
print "Module .ko file for $module not found. Aborting\n"; print "Module .ko file for $module not found. Aborting\n";
exit; exit;
} }
# ok so we found the module, now we need to calculate the vma offset # 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 $filename |") || die "Cannot start objdump";
while (<FILE>) { while (<FILE>) {
if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) { if ($_ =~ /^([0-9a-f]+) \<$function\>\:/) {
my $fu = $1; 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); close(FILE);
@ -212,7 +222,7 @@ sub InRange {
my ($address, $target) = @_; my ($address, $target) = @_;
my $ad = "0x".$address; my $ad = "0x".$address;
my $ta = "0x".$target; 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) && ($delta < 4096)) { if (($delta > -4096) && ($delta < 4096)) {
return 1; return 1;
@ -225,7 +235,7 @@ sub InRange {
# first, parse the input into the lines array, but to keep size down, # first, parse the input into the lines array, but to keep size down,
# we only do this for 4Kb around the sweet spot # we only do this for 4Kb around the sweet spot
open(FILE, "objdump -dS --adjust-vma=$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>) { while (<FILE>) {
my $line = $_; my $line = $_;
@ -345,3 +355,16 @@ while ($i < $finish) {
$i = $i +1; $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;
}