Detail publikace

Reconstruction of Instruction Idioms in a Retargetable Decompiler: Revisited

KŘOUSTEK, J. POKORNÝ, F. KOLÁŘ, D.

Originální název

Reconstruction of Instruction Idioms in a Retargetable Decompiler: Revisited

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Retargetable executable-code decompilation is a one of the most complicated reverse-engineering tasks. Among others, it involves de-optimization of compiler-optimized code. One type of such an optimization is usage of so-called instruction idioms. These idioms are used to produce faster or even smaller executable files. On the other hand, decompilation of instruction idioms without any advanced analysis produces almost unreadable high-level language code that may confuse the user of the decompiler. In this paper, we revisit and extend the previous approach of instruction-idioms detection used in a retargetable decompiler developed within the Lissom project. The previous approach was based on detection of instruction idioms in a very-early phase of decompilation (a front-end part) and it was inaccurate for architectures with a complex instruction set (e.g. Intel x86). The novel approach is based on delaying detection of idioms and reconstruction of code to the later phase (a middle-end part). For this purpose, we use the LLVM optimizer and we implement this analysis as a new pass in this tool. According to experimental results, this new approach significantly outperforms the previous approach as well as the other commercial solutions.

Klíčová slova

compiler optimizations, reverse engineering, decompiler, Lissom, instruction idioms, LLVM, LLVM IR

Autoři

KŘOUSTEK, J.; POKORNÝ, F.; KOLÁŘ, D.

Rok RIV

2014

Vydáno

1. 10. 2014

ISSN

1820-0214

Periodikum

COMPUT SCI INF SYST

Ročník

11

Číslo

4

Stát

Srbská republika

Strany od

1337

Strany do

1359

Strany počet

22

URL

http://www.comsis.org/

BibTex

@article{BUT111511,
  author="Jakub {Křoustek} and Fridolín {Pokorný} and Dušan {Kolář}",
  title="Reconstruction of Instruction Idioms in a Retargetable Decompiler: Revisited",
  journal="COMPUT SCI INF SYST",
  year="2014",
  volume="11",
  number="4",
  pages="1337--1359",
  doi="10.2298/CSIS131203076K",
  issn="1820-0214",
  url="http://www.comsis.org/"
}