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Re: [Xen-devel] [PATCH] 32on64 call gate support
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] 32on64 call gate support |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 26 Jan 2007 10:03:16 +0000 |
| Delivery-date: | Fri, 26 Jan 2007 02:02:55 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] 32on64 call gate support |
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On 26/1/07 9:38 am, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > As was realized in the course of creating this patch, 64-bit gates don't work > either, and will also need to be emulated if any environment intends to use > them. The patch changes behavior here in that rather silently permitting the > use of 64-bit gates (with possibly difficult to understand exceptions > happening > on the first instruction of the call/jump target) the call/jump itself will > now fault, > with the error code indicating the gate that was attempted to be used. I > intend to complete the emulation to also cover 64-bit gates, but there is one > issue that first needs to be addressed: Do we know that anyone uses 64-bit call gates? I would have thought it unlikely. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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