RUHR-UNIVERSIT¨AT BOCHUM Horst G¨ortz Institute for IT Security Technical Report HGI-TR-2010-001 ROPdefender: A Detection Tool to Defend Against Return-Oriented Programming Attacks Lucas Davi, Ahmad-Reza Sadeghi, Marcel Winandy System Security Lab Ruhr University Bochum, Germany Ruhr-Universit¨at Bochum HGI-TR-2010-001 Horst G¨ortz Institute for IT Security March 19, 2010 D-44780 Bochum, Germany