| 摘要 |
PROBLEM TO BE SOLVED: To hold security of safety data included in a memory of a data processor. SOLUTION: In a system supporting two or more of operating systems, a data processing thread operating in a first operating system occasionally receives interrupt for triggering interrupt treatment in a second operating system. When this interrupt treatment is completed in the second operating system, the first operating system is resumed by using return interrupt. This return interrupt designates the data processing thread active in the second operating system so as to be capable of switching, that is, resuming a proper task in the first operating system. This technology is particularly well suited to the system for using a safe operating system and a unsafe operating system operated on the same hardware. COPYRIGHT: (C)2004,JPO |
