Journal of Automated Reasoning

, Volume 42, Issue 2–4, pp 189–227 | Cite as

Formal Memory Models for the Verification of Low-Level Operating-System Code

Article

Abstract

This article contributes to the field of operating-systems verification. It presents a formalization of virtual memory that extends to memory-mapped devices. Our formalization consists of a stack of three detailed formal memory models: physical memory (i.e., RAM), physically-addressable memory-mapped devices (including their respective side effects, access and alignment requirements), and page-table based virtual memory. Each model is formally shown to satisfy the plain-memory specification, a memory abstraction that enables efficient reasoning for type-correct programs. This stack of memory models was developed in an attempt to verify Nova, the Robin micro-hypervisor. It is a key component of our verification environment for operating-system kernels based on the interactive theorem prover PVS.

Keywords

Operating-system kernel Micro-hypervisor Virtual memory Memory-mapped devices Formal verification 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Institute for Computing and Information SciencesRadboud Universiteit NijmegenNijmegenThe Netherlands
  2. 2.Institute for System ArchitectureTechnische Universität DresdenDresdenGermany
  3. 3.Computer LaboratoryUniversity of CambridgeCambridgeUK

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