| 摘要 |
PURPOSE:To trace the memory protect area access in the same execution mode as desired by providing a memory protect area set/release means, a trace classification designating means, and a trace executing means. CONSTITUTION:A trace indication table 3 holds trace indication information of virtual address access handled in common by an instruction processing part 1 and a processing control part 2 and designates the trace classification (reference, write, and trace of reference as well as write). At the time of tracing the access to a memory protect area, access to this memory protect area is inhibited by the instruction processing part 1 as the means which sets/releases the classification of protection in the first stage. Then, desired access trace is performed by the trace indication table 3 and the processing control part 2 which traces the access based on the designation of this table 3. In the second stage, access inhibition is released by the instruction processing part 1, and the access right of the actual pertinent execution mode is checked to access the memory. |
