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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
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+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;
		}