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Re: [Xen-devel] [RFC][PATCH] Emulate instructions in vm86 mode
| To: | Bastian Blank <bastian@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [RFC][PATCH] Emulate instructions in vm86 mode |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Thu, 07 Sep 2006 13:42:02 +0100 |
| Delivery-date: | Thu, 07 Sep 2006 05:40:56 -0700 |
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| Thread-topic: | [Xen-devel] [RFC][PATCH] Emulate instructions in vm86 mode |
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On 7/9/06 10:51, "Bastian Blank" <bastian@xxxxxxxxxxxx> wrote: > This patch fixes the emulation of instructions in vm86 mode. It fetches > them using cs and eip instead of only eip. This makes it at least > possible to use the i945GM vesa bios from the running system. > > I'm not sure if this is the correct fix or if we should call the gpf > handler of the running system. At least the support in linux reports > traps back to the userspace caller which is not possible if emulated in > xen. There are also data operands of some instructions that may need fixing (INS/OUTS). What happens if you just bail to the guest's GPF handler if in vm86 mode? I think the libint10 library in userspace will emulate all these instructions itself. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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