Memory management unit technique to detect cross-region...

Details Memory management unit technique to detect cross-region... Memory management unit technique to detect cross-region...

2007-03-13

2007-03-13

Purvis, Sue A. (Department: 2198)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S220000, C707S793000

Reexamination Certificate

active

11011734

ABSTRACT:
A method for detecting an invalid pointer including a source component and a target component, involving selecting a virtual source memory address for the source component wherein the virtual source memory address is within a first valid virtual address range, selecting a virtual target memory address for the target component wherein the virtual target memory address is within a second valid virtual address range, numerically combining the virtual source memory address and the virtual target memory address to obtain a new virtual source memory address, and writing the virtual target memory address into a memory location referenced by the new virtual source memory address, wherein writing the virtual target memory address triggers an action by a memory management unit (MMU) if the new virtual source memory address is an invalid memory location.

REFERENCES:
patent: 4775932 (1988-10-01), Oxley et al.
patent: 5845298 (1998-12-01), O'Connor et al.
patent: 6931423 (2005-08-01), Sexton et al.

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