On Wed, Sep 28, 2011 at 10:52:15PM +0300, Riku Voipio wrote: > On Tue, Sep 27, 2011 at 06:01:54PM -0700, Kees Cook wrote: > > Just to be explicit, PIE tends to have small (<1%) performance hits on > > register-starved architectures (i386) in most cases, for for certain work > > loads (e.g. python) the hit is large (~15%). On architectures with plenty > > of registers (amd64) there's virtually no measurable performance hit that > > I've seen. > > > If your package handles 3rd party data of any kind (renders, network > > daemons, file parsers, etc), I strongly recommend enabling PIE. > > However, on 32bit architectures address space randomizing (which is why > people try sell PIE as a security feature) does not add much security. > > http://benpfaff.org/papers/asrandom.pdf
Also note that as long as you can read memory in the process and have access to /proc/self/auxv, you can find the base address of all libraries. Mike -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110928213806.ga30...@glandium.org
