The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2018
Filed:
Jun. 16, 2016
Vmware, Inc., Palo Alto, CA (US);
Andrei Warkentin, Wakefield, MA (US);
Harvey Tuch, Cambridge, MA (US);
Cyprien Laplace, Cambridge, MA (US);
Alexander Fainkichen, Southborough, MA (US);
VMware, Inc., Palo Alto, CA (US);
Abstract
A method of providing a backdoor interface between software executing in a virtual machine and a hypervisor executing on a computing system that supports the virtual machine includes trapping, at the hypervisor, an exception generated in response to execution of a debug instruction on a central processing unit (CPU) by the software; identifying, by an exception handler of the hypervisor handling the exception, an equivalence between an immediate operand of the debug instruction and a predefined value; and invoking, in response to the equivalence, a backdoor service of the hypervisor using state of at least one register of the CPU as parametric input, the state being set by the software prior to executing the debug instruction.