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Viewing changes to builder-ld

  • Committer: Bazaar Package Importer
  • Author(s): Kees Cook
  • Date: 2008-01-08 16:00:58 UTC
  • Revision ID: james.westby@ubuntu.com-20080108160058-sfilpglt31x7124g
Tags: 1.1
Initial release.

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builder-ld
 
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#! /usr/bin/perl
 
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use strict;
 
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use warnings;
 
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my @args = ();
 
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my $debug = 0;
 
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if (defined($ENV{'DEB_BUILD_HARDENING'}) && $ENV{'DEB_BUILD_HARDENING'}!='0') {
 
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    $debug =         defined($ENV{'DEB_BUILD_HARDENING_DEBUG'}) ?
 
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                            $ENV{'DEB_BUILD_HARDENING_DEBUG'} : 0;
 
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    # Enable RELRO by default
 
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    my $use_relro = defined($ENV{'DEB_BUILD_HARDENING_RELRO'}) ?
 
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                        $ENV{'DEB_BUILD_HARDENING_RELRO'} : 1;
 
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    if ($use_relro) {
 
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        push(@args,'-z relro');
 
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    }
 
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    # Enable PIE by default
 
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    my $use_PIE = defined($ENV{'DEB_BUILD_HARDENING_PIE'}) ?
 
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                        $ENV{'DEB_BUILD_HARDENING_PIE'} : 1;
 
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    foreach my $arg (@ARGV) {
 
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        if ($arg eq "-nopie" ||
 
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            $arg eq "-fno-PIE" ||
 
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            $arg eq "-fno-pie" ||
 
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            $arg eq "-static" ||
 
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            $arg eq "-shared" ||
 
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            $arg eq "-nostdlib" ||
 
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            $arg eq "-nostartfiles")
 
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        {
 
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            $use_PIE = 0;
 
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        }
 
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    }
 
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    if ($use_PIE) {
 
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        push(@args,'-pie');
 
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    }
 
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}
 
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my @target = ("ld.real", @args, @ARGV);
 
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print STDERR join(" ",@target),"\n" if ($debug);
 
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exec @target or die "Unable to exec $target[0]: $!\n";