On 06/24/2015 12:14 PM, Fanhenglong wrote: > I want to debug the procedure of windows os install with windbg, > > windbg executes instruction(fxsave) after the blank vm is started and > before guest iso start to install, > > fxsave trigger the following code path: > vmx_vmexit_handler(EXIT_REASON_EPT_VIOLATION) > ->ept_handle_violation > ->hvm_hap_nested_page_fault > ->handle_mmio_with_translation > ->handle_mmio > ->hvm_emulate_one > ->x86_emulate > > *X86_emulate return X86EMUL_UNHANDLEABLE*
How are you using Xen in this case? Are you by any chance using the vm_event system in a way that sends back an "emulate" vm_event response from userspace? You might want to look at x86_emulate() in xen/arch/x86/x86_emulate/x86_emulate.c and see if (and how) fxsave is being handled. HTH, Razvan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
