公开(公告)号：US09658878B2

公开(公告)日：2017-05-23

申请号：US14467974

申请日：2014-08-25

Applicant: VMware, Inc.

Inventor： Daniel R. K. Ports ,  Xiaoxin Chen ,  Carl A. Waldspurger ,  Pratap Subrahmanyam ,  Tal Garfinkel

IPC: G06F9/46 ,  G06F11/14 ,  G06F9/48 ,  G06F9/455 ,  G06F9/44

CPC classification number: G06F9/461 ,  G06F9/4486 ,  G06F9/45533 ,  G06F9/45558 ,  G06F9/4881 ,  G06F11/1451 ,  G06F11/1484 ,  G06F2009/45562 ,  G06F2009/45583 ,  G06F2201/815 ,  G06F2201/84

Abstract: A virtual-machine-based system provides a mechanism to implement application file I/O operations of protected data by implementing the I/O operations semantics in a shim layer with memory-mapped regions. The semantics of these I/O operations are emulated in a shim layer with memory-mapped regions by using a mapping between a process' address space and a file or shared memory object. Data that is protected from viewing by a guest OS running in a virtual machine may nonetheless be accessed by the process.