Sequoll: A framework for model checking binaries

  • Authors:

  • Gernot Heiser;Bernard Blackham

  • Affiliations:

  • NICTA and University of New South Wales Sydney, Australia;NICTA and University of New South Wales Sydney, Australia

  • Venue:
  • RTAS '13 Proceedings of the 2013 IEEE 19th Real-Time and Embedded Technology and Applications Symposium (RTAS)
  • Year:
  • 2013

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Abstract

Multi-criticality real-time systems require protected-mode operating systems with bounded interrupt latencies and guaranteed isolation between components. A tight WCET analysis of such systems requires trustworthy information about loop bounds and infeasible paths. We propose sequoll, a framework for employing model checking of binary code to determine loop counts and infeasible paths, as well as validating manual infeasible path annotations which are often error-prone. We show that sequoll automatically determines many of the loop counts in the Ma篓lardalen WCET benchmarks. We also show that sequoll computes loop bounds and validates several infeasible path annotations used to reduce the computed WCET bound of seL4, a high-assurance protected microkernel for multi-criticality systems.