On Fri, 8 Jul 2011, Dave Martin wrote: > On Fri, Jul 08, 2011 at 12:21:27AM +0100, David Gilbert wrote: > > Nicolas just added; Richard's argument is that if it was actually a > > VDSO I'd just have linked against a symbol and if the symbol wasn't > > there then I would have got a fairly normal linker error - I wouldn't > > have needed any special code; and to be honest I think that would also > > solve the problem that accessing that wacky address is also a pain for > > things like qemu because we're going to have to intercept that read. > > Note that pre-existing code already calls into the vectors page.
Right, qemu must be intercepting it already. The kernel helpers located at a fixed address in the vector page have been around for more than 6 years. > This doesn't necessarily mean that adding a VDSO interface is bad, > but it does mean the existing interface can't easily be changed or > removed. Agreed. There is nothing preventing the addition of a VDSO, but I've yet to see a convincing argument for spending time adding it. Nicolas _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
