forked from OSchip/llvm-project
139 lines
3.0 KiB
Perl
Executable File
139 lines
3.0 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
|
|
#
|
|
#//===----------------------------------------------------------------------===//
|
|
#//
|
|
#// The LLVM Compiler Infrastructure
|
|
#//
|
|
#// This file is dual licensed under the MIT and the University of Illinois Open
|
|
#// Source Licenses. See LICENSE.txt for details.
|
|
#//
|
|
#//===----------------------------------------------------------------------===//
|
|
#
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use FindBin;
|
|
use lib "$FindBin::Bin/lib";
|
|
|
|
use tools;
|
|
|
|
our $VERSION = "0.002";
|
|
|
|
sub execstack($) {
|
|
my ( $file ) = @_;
|
|
my @output;
|
|
my @stack;
|
|
execute( [ "readelf", "-l", "-W", $file ], -stdout => \@output );
|
|
@stack = grep( $_ =~ m{\A\s*(?:GNU_)?STACK\s+}, @output );
|
|
if ( not @stack ) {
|
|
# Interpret missed "STACK" line as error.
|
|
runtime_error( "$file: No stack segment found; looks like stack would be executable." );
|
|
}; # if
|
|
if ( @stack > 1 ) {
|
|
runtime_error( "$file: More than one stack segment found.", "readelf output:", @output, "(eof)" );
|
|
}; # if
|
|
# Typical stack lines are:
|
|
# Linux* OS IA-32 architecture:
|
|
# GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4
|
|
# Linux* OS Intel(R) 64:
|
|
# GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RWE 0x8
|
|
if ( $stack[ 0 ] !~ m{\A\s*(?:GNU_)?STACK(?:\s+0x[0-9a-f]+){5}\s+([R ][W ][E ])\s+0x[0-9a-f]+\s*\z} ) {
|
|
runtime_error( "$file: Cannot parse stack segment line:", ">>> $stack[ 0 ]" );
|
|
}; # if
|
|
my $attrs = $1;
|
|
if ( $attrs =~ m{E} ) {
|
|
runtime_error( "$file: Stack is executable" );
|
|
}; # if
|
|
}; # sub execstack
|
|
|
|
get_options(
|
|
);
|
|
|
|
foreach my $file ( @ARGV ) {
|
|
execstack( $file );
|
|
}; # foreach $file
|
|
|
|
exit( 0 );
|
|
|
|
__END__
|
|
|
|
=pod
|
|
|
|
=head1 NAME
|
|
|
|
B<check-execstack.pl> -- Check whether stack is executable, issue an error if so.
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
B<check-execstack.pl> I<optiion>... I<file>...
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The script checks whether stack of specified executable file, and issues error if stack is
|
|
executable. If stack is not executable, the script exits silently with zero exit code.
|
|
|
|
The script runs C<readelf> utility to get information about specified executable file. So, the
|
|
script fails if C<readelf> is not available. Effectively it means the script works only on Linux* OS
|
|
(and, probably, Intel(R) Many Integrated Core Architecture).
|
|
|
|
=head1 OPTIONS
|
|
|
|
=over
|
|
|
|
=item Standard Options
|
|
|
|
=over
|
|
|
|
=item B<--doc>
|
|
|
|
=item B<--manual>
|
|
|
|
Print full help message and exit.
|
|
|
|
=item B<--help>
|
|
|
|
Print short help message and exit.
|
|
|
|
=item B<--usage>
|
|
|
|
Print very short usage message and exit.
|
|
|
|
=item B<--verbose>
|
|
|
|
Do print informational messages.
|
|
|
|
=item B<--version>
|
|
|
|
Print program version and exit.
|
|
|
|
=item B<--quiet>
|
|
|
|
Work quiet, do not print informational messages.
|
|
|
|
=back
|
|
|
|
=back
|
|
|
|
=head1 ARGUMENTS
|
|
|
|
=over
|
|
|
|
=item I<file>
|
|
|
|
A name of executable or shared object to check. Multiple files may be specified.
|
|
|
|
=back
|
|
|
|
=head1 EXAMPLES
|
|
|
|
Check libiomp5.so library:
|
|
|
|
$ check-execstack.pl libiomp5.so
|
|
|
|
=cut
|
|
|
|
# end of file #
|
|
|