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Sound C Code Decompilation for a Subset of x86-64 Binaries

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Software Engineering and Formal Methods (SEFM 2020)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 12310))

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Abstract

We present FoxDec: an approach to C code decompilation that aims at producing sound and recompilable code. Formal methods are used during three phases of the decompilation process: control flow recovery, symbolic execution, and variable analysis. The use of formal methods minimizes the trusted code base and ensures soundness: the extracted C code behaves the same as the original binary. Soundness and recompilablity enable C code decompilation to be used in the contexts of binary patching, binary porting, binary analysis and binary improvement, with confidence that the recompiled code’s behavior is consistent with the original program. We demonstrate that FoxDec can be used to improve execution speed by recompiling a binary with different compiler options, to patch a memory leak with a code transformation tool, and to port a binary to a different architecture. FoxDec can also be leveraged to port a binary to run as a unikernel, a minimal and secure virtual machine usually requiring source access for porting.

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Acknowledgments

This work is supported in part by the US Office of Naval Research (ONR) under grants N00014-17-1-2297, N00014-16-1-2104, and N00014-18-1-2022.

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Authors and Affiliations

  1. Virginia Tech, Blacksburg, VA, USA

    Freek Verbeek & Binoy Ravindran

  2. Open University of The Netherlands, Heerlen, The Netherlands

    Freek Verbeek

  3. University of Manchester, Manchester, UK

    Pierre Olivier

Authors
  1. Freek Verbeek
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  2. Pierre Olivier
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  3. Binoy Ravindran
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Correspondence to Freek Verbeek .

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Editors and Affiliations

  1. Informatica, Centrum voor Wiskunde en Informatica (CWI), Amsterdam, The Netherlands

    Frank de Boer

  2. Department of Computer Science, Nazarbayev University, Astana, Kazakhstan

    Antonio Cerone

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Verbeek, F., Olivier, P., Ravindran, B. (2020). Sound C Code Decompilation for a Subset of x86-64 Binaries. In: de Boer, F., Cerone, A. (eds) Software Engineering and Formal Methods. SEFM 2020. Lecture Notes in Computer Science(), vol 12310. Springer, Cham. https://doi.org/10.1007/978-3-030-58768-0_14

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  • DOI: https://doi.org/10.1007/978-3-030-58768-0_14

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