On Thu, Apr 04, 2013 at 09:39:18AM +0200, Paolo Bonzini wrote: > > I'm willing to agree that PIE on x86 is going to be very slow due to > > register pressure. > > Yes, but not on x86-64 which has %rip-relative addressing. It is > probably a wash there. It isn't, while the register pressure doesn't increase on x86-64 due to PIC/PIE and PIC register setup doesn't require any code, whenever you access data that aren't known at compile time to be in the binary/shared library (i.e. static or hidden mostly), then for PIC/PIE it means an extra indirection through GOT. Jakub -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
