The FLINT Project

Research

People

Publications

Software

Support

Links

Internal

Toward Compositional Verification of Interruptible OS Kernels and Device Drivers

Last modified: Sun Jun 26 02:09:00 2016 GMT.

Authors

Hao Chen
Newman Wu
Zhong Shao
Joshua Lockerman
Ronghui Gu

Abstract

An operating system (OS) kernel forms the lowest level of any system software stack. The correctness of the OS kernel is the basis for the correctness of the entire system. Recent efforts have demonstrated the feasibility of building formally verified general-purpose kernels, but it is unclear how to extend their work to verify the functional correctness of device drivers, due to the non-local effects of interrupts. In this paper, we present a novel compositional framework for building certified interruptible OS kernels with device drivers. We provide a general device model that can be instantiated with various hardware devices, and a realistic formal model of interrupts, which can be used to reason about interruptible code. We have realized this framework in the Coq proof assistant. To demonstrate the effectiveness of our new approach, we have successfully extended an existing verified non-interruptible kernel with our framework and turned it into an interruptible kernel with verified device drivers. To the best of our knowledge, this is the first verified interruptible operating system with device drivers.

Published

In Proc. 2016 ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI'16), Santa Barbara, CA, pages 431-447, June 2016.
  • Conference Version [PDF]
  • Slides for the PLDI'16 Talk [PDF] and [PPTX w. full animation]

  • Copyright © 1996-2017 The FLINT Group <flint at cs dot yale dot edu>
    Yale University Department of Computer Science
    Validate this page
    colophon