Re: [libvirt] [PATCH 1/2] Build all binaries with PIE
On 04/03/2013 05:41 AM, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange(a)redhat.com>
PIE (position independent executable) adds security to executables
by composing them entirely of position-independent code (PIC. The
.so libraries already build with -fPIC. This adds -fPIE which is
the equivalent to -fPIC, but for executables. This for allows Exec
Shield to use address space layout randomization to prevent attackers
from knowing where existing executable code is during a security
attack using exploits that rely on knowing the offset of the
executable code in the binary, such as return-to-libc attacks.
Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com>
---
+++ b/m4/virt-compile-pie.m4
@@ -0,0 +1,13 @@
+dnl
+dnl Check for support for position independent executables
This new file is currently small enough to get away with no copyright
notice, but adding one now would be easier than scratching our heads
during a later audit on whether it is needed.
ACK, whether or not you add a copyright blurb to the new .m4 file.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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