| 摘要 |
PROBLEM TO BE SOLVED: To execute calling between a protected program and an unprotected program at a high speed. SOLUTION: Identifiers are allocated, to be held, respectively to a program and a virtual space region of which the single virtual spaces are partitioned, and an access is controlled to be allowed from the program to the virtual space region where the identifier of the program is consistent with the identifier of the virtual space region or where the identifier for indicating sharing as access attributes is imparted. |
