Boots – shoes – and leggings
Patent
1981-05-22
1985-10-01
Heckler, Thomas M.
Boots, shoes, and leggings
G06F 706
Patent
active
045450129
ABSTRACT:
An access control system for use in a digital computer system wherein the memory system is organized into objects, a data item is locatable by specifying an object, instructions are contained in procedures, and the operations performed by the system include a call operation for suspending an execution of a procedure and commencing another execution and a return operation for terminating an execution and resuming a suspended execution. The access control system associates each procedure with a domain, i.e., a set of objects accessible to the procedure. The access control system further includes a secure stack object which is accessible only to the access control system. When a call operation commences execution of a procedure which has a different domain, the access control system responds to the call operation by storing information required to return to the current domain in the secure stack. When a return operation resumes execution of a procedure which has a different domain, the access control system responds to the call operation by using the information in the secure stack to return to the previous domain.
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patent: 4084228 (1978-04-01), Dufond et al.
patent: 4325120 (1982-04-01), Colley et al.
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Bratt Richard G.
Clancy Gerald F.
Gavrin Edward S.
Mundie Craig J.
Schleimer Stephen I.
Data General Corporation
Heckler Thomas M.
O'Connell Robert F.
Wipns Tim A.
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