Messages in this thread |  | | Date | Fri, 16 Jun 2006 18:33:15 +0200 | | From | Jakub Jelinek <> | | Subject | Re: FOR REVIEW: New x86-64 vsyscall vgetcpu() |
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On Fri, Jun 16, 2006 at 06:24:52PM +0200, Andi Kleen wrote: > I wonder why it happened on x86-64 though - i thought there were no negative > offsets on x86-64 TLS.
It uses negative offsets for __thread vars and positive are reserved for implementation (i.e. glibc). But as %fs in 64-bit programs is just msr 0xc0000100 base addition, with no segment limit, neither Xen nor VMWare can play limit tricks with it.
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