Messages in this thread | | | Date | Fri, 16 Jun 2006 17:58:04 +0200 | From | Jakub Jelinek <> | Subject | Re: FOR REVIEW: New x86-64 vsyscall vgetcpu() |
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On Fri, Jun 16, 2006 at 05:37:06PM +0200, Andi Kleen wrote: > On Friday 16 June 2006 17:31, Zoltan Menyhart wrote: > > Andi Kleen wrote: > > > > > That is not how user space TLS works. It usually has a base a register. > > > > Can you please give me a real life (simplified) example? > > On x86-64 it's just %fs:offset. gcc is a bit dumb on this and usually > loads the base address from %fs:0 first.
GCC is not dumb, unless you force it with -mno-tls-direct-seg-refs. Guess you are bitten by SUSE GCC hack which makes -mno-tls-direct-seg-refs the default (especially on x86-64 it is a really bad idea).
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