PO9-87-006 NONHIERARCHICAL PROGRAM AUTHORIZATION MECHANISM A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associated address space can only be accessed by an authorized program. For a program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.
申请公布号
CA1313424(C)
申请公布日期
1993.02.02
申请号
CA19890587711
申请日期
1989.01.06
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
BAUM, RICHARD I.;BORDEN, TERRY L.;BUTWELL, JUSTIN R.;CLARK, CARL E.;GANEK, ALAN G.;LUM, JAMES;MALL, MICHAEL G.;PAGE, DAVID R.;PLAMBECK, KENNETH E.;SCALZI, CASPER A.;SCHMALZ, RICHARD J.