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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Real-mode bug with AMD, gPXE, and 32-bit rep movs
At 16:24 +0000 on 26 Mar (1238084646), Christoph Egger wrote: > I think it's #2. Look at the #GP causes in APM > Volume 2 for MOVSx: the only one in real mode is if the address > exceeded a data segment limit. And the comment from Deegan about > clipping segment limits to 16 bits makes me think that the clipping is > happening on AMD machines and it shouldn't be. That particular clipping happens in vmx.c so I certainly hope it doesn't get called on AMD machines. :) But yes, it's likely that some big-real-mode segment state has got lost somewhere. Tim. -- Tim Deegan <Tim.Deegan@xxxxxxxxxx> Principal Software Engineer, Citrix Systems (R&D) Ltd. [Company #02300071, SL9 0DZ, UK.] _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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