| 摘要 |
PROBLEM TO BE SOLVED: To protect stored data among plural function modules of a single program by judging whether the module corresponding to the present program counter can access a data segment. SOLUTION: If the address requested by a processor 10 is identical to the data segment that is defined via an access right management table 20, an access right judging means 21 judges whether the module corresponding to the present program counter can access the defined data segment via the table 20. If this access is possible, the means 21 sends the requested address to a memory 11. The memory 11 sends its contents corresponding to the received address to the processor 10. Thus, it's possible to protect the stored data in every module by referring to the table 20 based on the present program counter. |
