| 摘要 |
The present invention relates to a method of controlling the operation of a processing device in a first mode or in a second mode. The processing device has a first execution environment and a second execution environment. The method comprises, upon detection of a switch between said first and second modes, setting in the first execution environment a value of a shared variable to an initial value, upon detection of a request of execution of instructions in the second execution environment, updating the value of said shared variable to a value different from the initial value, and reading a current value of the shared variable and causing the processing device to operate in the first mode or in the second mode depending at least on the current value of the shared variable. |
