Secure pointers

Details Secure pointers Secure pointers

2007-02-20

2007-02-20

Thai, Tuan V. (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S203000, C711S206000

Reexamination Certificate

active

10401252

ABSTRACT:
A method, apparatus, system, and signal-bearing medium that in an embodiment map a pointer to a target indirectly via a pointer map. In an embodiment, the pointer map is stored in a reserved area and an entry for the pointer in the pointer map includes a back-pointer containing an address of the pointer and a target-address containing the address of the target. When the pointer is accessed, the pointer is checked to ensure its contents point at the entry in the pointer map in the reserved area and that the back-pointer in the pointer map entry points back at the pointer. In this way, pointers are protected from being modified illegitimately.

REFERENCES:
patent: 4868745 (1989-09-01), Patton et al.
patent: 5459798 (1995-10-01), Bailey et al.
patent: 5835963 (1998-11-01), Yoshioka et al.
patent: 5881379 (1999-03-01), Beier et al.
patent: 6085296 (2000-07-01), Karkhanis et al.

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