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2002 FREENIX Track Technical Program - Abstract
Simple Memory Protection for
Embedded Operating System Kernels
Frank W. Miller, Department of Computer Science & Electrical Engineering, University of Maryland
Abstract
This work describes the design and implementation of memory
protection in the Roadrunner operating system. The design is
portable between various CPUs that provide page-level protection
using Memory-Management Unit (MMU) hardware. The approach overlays
protection domains on regions of physical memory that are in
use by application processes and the operating system kernel.
An analysis of code size shows that this design and implementation
can be executed with an order of magnitude less code than that of
implementations providing separate address spaces.
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Technical Program