Authorization for selective program access to data in multiple address spaces
US5023773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1988 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Feb 10, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1483
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
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 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.