Protected function calling
US8010772B2 · kind B2 · utility
7Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2008 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Mar 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/1004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Memory address space is divided into domains and instruction access control circuitry is used to detect when the memory address from which an instruction to be executed is fetched has crossed a domain boundary and changed and in such cases to conduct a check to ensure that the instruction within the new domain is a permitted instruction of a permitted form. The permitted instruction can be arranged to be a no operation instruction other than in respect of the instruction access control circuitry, in order to assist backward compatibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.