Task following between multiple operating systems

Details Task following between multiple operating systems Task following between multiple operating systems

2003-11-17

2010-02-09

An, Meng-Ai (Department: 2195)

Electrical computers and digital processing systems: virtual mac

Task management or control

C718S001000, C718S108000, C719S319000, C713S166000

Reexamination Certificate

active

07661104

ABSTRACT:
A processor may utilise two operating systems (Non-Secure, Secure) between which calls may be made. In order that a second operating system can track task switches made by a first operating system, each time a call is made to the second operating system, this call includes an identifier to enable discrimination between the task which was executing on the first operating system when that call was made. The identifier can be a call identifier and/or a target thread identifier and may include further parameters.

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Trusted Computing Group (TCB), Main Specification Version 1.1a, Sep. 1, 2001, pp. i-x and 1-322.

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