Protocol for communication with a user-mode device driver

Details Protocol for communication with a user-mode device driver Protocol for communication with a user-mode device driver

2005-04-21

2009-10-13

Tsai, Henry W. H. (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

C719S327000

Reexamination Certificate

active

07603484

ABSTRACT:
A user-mode device driver architecture is provided by the subject invention. The architecture includes a reflector, a driver manager and a host process which hosts and isolates one or more user-mode device driver(s). The user-mode device driver runs in the user-mode (UM) environment and has access to various UM services. The reflector resides in “kernel memory” (e.g., memory/resource(s) available to operating system) while the driver manager, host process and user mode device driver(s) are located in user space (e.g., memory/resource(s) available to user application(s)). The reflector provides a secure, stable communication path for application(s), the host process and/or user-mode device driver(s) to communicate with the operating system.

REFERENCES:
patent: 2002/0152331 (2002-10-01), Wong et al.
patent: 2005/0015702 (2005-01-01), Shier et al.
patent: 2005/0050236 (2005-03-01), Zeryck et al.
patent: 2005/0257226 (2005-11-01), Belvin et al.
U.S. Appl. No. 10/985,360, filed Nov. 10, 2004, Wieland et al.
U.S. Appl. No. 11/111,016, filed Apr. 21, 2005, Sankaranarayan et al.
Galen C. Hunt, Creating User-Mode Device Drivers with a Proxy, Proceedings of the 1st USENIX Windows NT Workshop, Aug. 1999, pp. 1-6, Seattle, WA.

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