Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH/RFC] Shared page tables | Date | Tue, 24 Jan 2006 02:38:29 +0100 |
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On Tuesday 24 January 2006 02:23, Benjamin LaHaise wrote: > On Tue, Jan 24, 2006 at 02:10:03AM +0100, Andi Kleen wrote: > > The randomization is not for cache coloring, but for security purposes > > (except for the old very small stack randomization that was used > > to avoid conflicts on HyperThreaded CPUs). I would be surprised if the > > mmap made much difference because it's page aligned and at least > > on x86 the L2 and larger caches are usually PI. > > Actually, does this even affect executable segments? Iirc, prelinking > already results in executables being mapped at the same physical offset > across binaries in a given system. An strace seems to confirm that.
Shared libraries should be affected. And prelink is not always used.
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