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Commit 62139c12 authored by Tobin C. Harding's avatar Tobin C. Harding
Browse files

leaking_addresses: add support for ppc64 



Currently script is targeted at x86_64. We can support other
architectures by using the correct regular expressions for each
architecture.

Add the infrastructure to support multiple architectures. Add support
for ppc64.

Signed-off-by: default avatarTobin C. Harding <me@tobin.cc>
parent d09bd8da

scripts/leaking_addresses.pl

+60 −6
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ use File::Spec; 
use Cwd 'abs_path';

use Term::ANSIColor qw(:constants);

use Getopt::Long qw(:config no_auto_abbrev);

use Config;



my $P = $0;

my $V = '0.01';
@@ -28,6 +29,11 @@ my $V = '0.01'; 
# Directories to scan.

my @DIRS = ('/proc', '/sys');



# Script can only grep for kernel addresses on the following architectures. If

# your architecture is not listed here and has a grep'able kernel address please

# consider submitting a patch.

my @SUPPORTED_ARCHITECTURES = ('x86_64', 'ppc64');



# Command line options.

my $help = 0;

my $debug = 0;
@@ -137,6 +143,20 @@ if (!$input_raw and ($squash_by_path or $squash_by_filename)) { 
	exit(128);

}



if (!is_supported_architecture()) {

	printf "\nScript does not support your architecture, sorry.\n";

	printf "\nCurrently we support: \n\n";

	foreach(@SUPPORTED_ARCHITECTURES) {

		printf "\t%s\n", $_;

	}



	my $archname = $Config{archname};

	printf "\n\$ perl -MConfig -e \'print \"\$Config{archname}\\n\"\'\n";

	printf "%s\n", $archname;



	exit(129);

}



if ($output_raw) {

	open my $fh, '>', $output_raw or die "$0: $output_raw: $!\n";

	select $fh;
@@ -152,6 +172,31 @@ sub dprint 
	printf(STDERR @_) if $debug;

}



sub is_supported_architecture

{

	return (is_x86_64() or is_ppc64());

}



sub is_x86_64

{

	my $archname = $Config{archname};



	if ($archname =~ m/x86_64/) {

		return 1;

	}

	return 0;

}



sub is_ppc64

{

	my $archname = $Config{archname};



	if ($archname =~ m/powerpc/ and $archname =~ m/64/) {

		return 1;

	}

	return 0;

}



sub is_false_positive

{

	my ($match) = @_;
@@ -161,11 +206,13 @@ sub is_false_positive 
		return 1;

	}





	if ($match =~ '\bf{10}600000\b' or# vsyscall memory region, we should probably check against a range here.

	if (is_x86_64) {

		# vsyscall memory region, we should probably check against a range here.

		if ($match =~ '\bf{10}600000\b' or

		    $match =~ '\bf{10}601000\b') {

			return 1;

		}

	}



	return 0;

}
@@ -174,7 +221,7 @@ sub is_false_positive 
sub may_leak_address

{

	my ($line) = @_;

	my $address = '\b(0x)?ffff[[:xdigit:]]{12}\b';

	my $address_re;



	# Signal masks.

	if ($line =~ '^SigBlk:' or
@@ -187,7 +234,14 @@ sub may_leak_address 
		return 0;

	}



	while (/($address)/g) {

	# One of these is guaranteed to be true.

	if (is_x86_64()) {

		$address_re = '\b(0x)?ffff[[:xdigit:]]{12}\b';

	} elsif (is_ppc64()) {

		$address_re = '\b(0x)?[89abcdef]00[[:xdigit:]]{13}\b';

	}



	while (/($address_re)/g) {

		if (!is_false_positive($1)) {

			return 1;

		}