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Re: [Xen-devel] 64-bit failsafe callback
| To: | <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] 64-bit failsafe callback |
| From: | "Jan Beulich" <jbeulich@xxxxxxxxxx> |
| Date: | Tue, 28 Mar 2006 03:30:05 +0200 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 28 Mar 2006 01:31:43 +0000 |
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>The reload into %gs is indeed bogus -- it should instead >HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, gs). ... and then perhaps also for %fs (though I see there is no hypercall for that, so this is going to be more complicated, given that this happens in an assembly file), and perhaps avoiding the two loads altogether if the selectors are zero and their present values are also zero, to prevent trampling on any base values in effect. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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