Mapping an N -bit application ported from an M -bit...

Details Mapping an N -bit application ported from an M -bit... Mapping an N -bit application ported from an M -bit...

2011-08-16

2011-08-16

Yu, Jae U (Department: 2185)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S202000, C711S206000, C712S200000, C713S002000

Reexamination Certificate

active

08001359

ABSTRACT:
Embodiments of the present invention provide a system that maps an N-bit application to virtual memory. The N-bit application may be obtained by porting an M-bit application to an N-bit architecture where N is greater than M. During operation, the system receives a request to map an N-bit application to a computer's virtual memory. The system then maps the N-bit application to a section of virtual memory which begins at a memory address that is greater than or equal to 2M. If the N-bit application accesses a memory address which is less than 2M, the system can generate a trap, thereby facilitating the discovery of M-bit memory references in the N-bit application.

REFERENCES:
patent: 5734904 (1998-03-01), Kanamori et al.
patent: 5968174 (1999-10-01), Hughes
patent: 6973562 (2005-12-01), McGrath et al.
patent: 7260702 (2007-08-01), Vega et al.
patent: 2001/0034822 (2001-10-01), Weinreb et al.
patent: 2006/0212609 (2006-09-01), Zimmer et al.

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