Guarded regions for controlling memory access

Details Guarded regions for controlling memory access Guarded regions for controlling memory access

1984-08-17

1987-06-30

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 1214, G06F 1200

Patent

active

046775463

ABSTRACT:
In a virtual memory system, a guarded region allows access to protected code and data without intervention from a processor's operating system by redefining regions of an address space with reference to gates indicating points of entry for those regions. A non-hierarchial access path in the form of a tree-like structure permits a process to access resources and data while controlling access thereto and return therefrom.

REFERENCES:
patent: 4038645 (1977-07-01), Birney et al.
patent: 4084227 (1978-04-01), Bennett
patent: 4099256 (1978-07-01), Draper
patent: 4231088 (1980-10-01), Hammer et al.
patent: 4300192 (1981-11-01), Couleur et al.
patent: 4355355 (1982-10-01), Butwell et al.
patent: 4388685 (1983-06-01), Kotok et al.
patent: 4442484 (1984-04-01), Childs et al.

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