Relational Program Reasoning Using Compiler IR
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Glibc and System Calls Documentation Release 1.0
Glibc and System Calls Documentation Release 1.0 Rishi Agrawal <[email protected]> Dec 28, 2017 Contents 1 Introduction 1 1.1 Acknowledgements...........................................1 2 Basics of a Linux System 3 2.1 Introduction...............................................3 2.2 Programs and Compilation........................................3 2.3 Libraries.................................................7 2.4 System Calls...............................................7 2.5 Kernel.................................................. 10 2.6 Conclusion................................................ 10 2.7 References................................................ 11 3 Working with glibc 13 3.1 Introduction............................................... 13 3.2 Why this chapter............................................. 13 3.3 What is glibc .............................................. 13 3.4 Download and extract glibc ...................................... 14 3.5 Walkthrough glibc ........................................... 14 3.6 Reading some functions of glibc ................................... 17 3.7 Compiling and installing glibc .................................... 18 3.8 Using new glibc ............................................ 21 3.9 Conclusion................................................ 23 4 System Calls On x86_64 from User Space 25 4.1 Setting Up Arguements......................................... 25 4.2 Calling the System Call......................................... 27 4.3 Retrieving the Return Value...................................... -
Preview Objective-C Tutorial (PDF Version)
Objective-C Objective-C About the Tutorial Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. This is the main programming language used by Apple for the OS X and iOS operating systems and their respective APIs, Cocoa and Cocoa Touch. This reference will take you through simple and practical approach while learning Objective-C Programming language. Audience This reference has been prepared for the beginners to help them understand basic to advanced concepts related to Objective-C Programming languages. Prerequisites Before you start doing practice with various types of examples given in this reference, I'm making an assumption that you are already aware about what is a computer program, and what is a computer programming language? Copyright & Disclaimer © Copyright 2015 by Tutorials Point (I) Pvt. Ltd. All the content and graphics published in this e-book are the property of Tutorials Point (I) Pvt. Ltd. The user of this e-book can retain a copy for future reference but commercial use of this data is not allowed. Distribution or republishing any content or a part of the content of this e-book in any manner is also not allowed without written consent of the publisher. We strive to update the contents of our website and tutorials as timely and as precisely as possible, however, the contents may contain inaccuracies or errors. Tutorials Point (I) Pvt. Ltd. provides no guarantee regarding the accuracy, timeliness or completeness of our website or its contents including this tutorial. If you discover any errors on our website or in this tutorial, please notify us at [email protected] ii Objective-C Table of Contents About the Tutorial .................................................................................................................................. -
Embedded Linux Systems with the Yocto Project™
OPEN SOURCE SOFTWARE DEVELOPMENT SERIES Embedded Linux Systems with the Yocto Project" FREE SAMPLE CHAPTER SHARE WITH OTHERS �f, � � � � Embedded Linux Systems with the Yocto ProjectTM This page intentionally left blank Embedded Linux Systems with the Yocto ProjectTM Rudolf J. Streif Boston • Columbus • Indianapolis • New York • San Francisco • Amsterdam • Cape Town Dubai • London • Madrid • Milan • Munich • Paris • Montreal • Toronto • Delhi • Mexico City São Paulo • Sidney • Hong Kong • Seoul • Singapore • Taipei • Tokyo Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The author and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. For information about buying this title in bulk quantities, or for special sales opportunities (which may include electronic versions; custom cover designs; and content particular to your business, training goals, marketing focus, or branding interests), please contact our corporate sales depart- ment at [email protected] or (800) 382-3419. For government sales inquiries, please contact [email protected]. For questions about sales outside the U.S., please contact [email protected]. Visit us on the Web: informit.com Cataloging-in-Publication Data is on file with the Library of Congress. -
Smashing the Stack Protector for Fun and Profit
Smashing the Stack Protector for Fun and Profit Bruno Bierbaumer1 ( ), Julian Kirsch1, Thomas Kittel1, Aurélien Francillon2, and Apostolis Zarras3 1 Technical University of Munich, Munich, Germany [email protected] 2 EURECOM, Sophia Antipolis, France 3 Maastricht University, Maastricht, Netherlands Abstract. Software exploitation has been proven to be a lucrative busi- ness for cybercriminals. Unfortunately, protecting software against attacks is a long-lasting endeavor that is still under active research. However, certain software-hardening schemes are already incorporated into current compilers and are actively used to make software exploitation a compli- cated procedure for the adversaries. Stack canaries are such a protection mechanism. Stack canaries aim to prevent control flow hijack by detecting corruption of a specific value on the program’s stack. Careful design and implementation of this conceptually straightforward mechanism is crucial to defeat stack-based control flow detours. In this paper, we examine 17 different stack canary implementations across multiple versions of the most popular Operating Systems running on various architectures. We systematically compare critical implementation details and introduce one new generic attack vector which allows bypassing stack canaries on current Linux systems running up-to-date multi-threaded software altogether. We release an open-source framework (CookieCrumbler) that identifies the characteristics of stack canaries on any platform it is compiled on and we propose mitigation techniques against stack-based attacks. Although stack canaries may appear obsolete, we show that when they are used correctly, they can prevent intrusions which even the more sophisticated solutions may potentially fail to block. 1 Introduction Buffer overflow vulnerabilities are as old as the Internet itself. -
Rmox: a Raw-Metal Occam Experiment
Communicating Process Architectures – 2003 269 Jan F. Broenink and Gerald H. Hilderink (Eds.) IOS Press, 2003 RMoX: A Raw-Metal occam Experiment Fred BARNES†, Christian JACOBSEN† and Brian VINTER‡ † Computing Laboratory, University of Kent, Canterbury, Kent, CT2 7NF, England. {frmb2,clj3}@kent.ac.uk ‡ Department of Mathematics and Computer Science, University of Southern Denmark, Odense, Denmark. [email protected] Abstract. Operating-systems are the core software component of many modern com- puter systems, ranging from small specialised embedded systems through to large distributed operating-systems. This paper presents RMoX: a highly concurrent CSP- based operating-system written in occam. The motivation for this stems from the overwhelming need for reliable, secure and scalable operating-systems. The major- ity of operating-systems are written in C, a language that easily offers the level of flexibility required (for example, interfacing with assembly routines). C compilers, however, provide little or no mechanism to guard against race-hazard and aliasing er- rors, that can lead to catastrophic run-time failure (as well as to more subtle errors, such as security loop-holes). The RMoX operating-system presents a novel approach to operating-system design (although this is not the first CSP-based operating-system). Concurrency is utilised at all levels, resulting in a system design that is well defined, easily understood and scalable. The implementation, using the KRoC extended oc- cam, provides guarantees of freedom from race-hazard and aliasing errors, and makes extensive use of the recently added support for dynamic process creation and channel mobility. Whilst targeted at mainstream computing, the ideas and methods presented are equally applicable for small-scale embedded systems — where advantage can be made of the lightweight nature of RMoX (providing fast interrupt responses, for ex- ample). -
The Glib/GTK+ Development Platform
The GLib/GTK+ Development Platform A Getting Started Guide Version 0.8 Sébastien Wilmet March 29, 2019 Contents 1 Introduction 3 1.1 License . 3 1.2 Financial Support . 3 1.3 Todo List for this Book and a Quick 2019 Update . 4 1.4 What is GLib and GTK+? . 4 1.5 The GNOME Desktop . 5 1.6 Prerequisites . 6 1.7 Why and When Using the C Language? . 7 1.7.1 Separate the Backend from the Frontend . 7 1.7.2 Other Aspects to Keep in Mind . 8 1.8 Learning Path . 9 1.9 The Development Environment . 10 1.10 Acknowledgments . 10 I GLib, the Core Library 11 2 GLib, the Core Library 12 2.1 Basics . 13 2.1.1 Type Definitions . 13 2.1.2 Frequently Used Macros . 13 2.1.3 Debugging Macros . 14 2.1.4 Memory . 16 2.1.5 String Handling . 18 2.2 Data Structures . 20 2.2.1 Lists . 20 2.2.2 Trees . 24 2.2.3 Hash Tables . 29 2.3 The Main Event Loop . 31 2.4 Other Features . 33 II Object-Oriented Programming in C 35 3 Semi-Object-Oriented Programming in C 37 3.1 Header Example . 37 3.1.1 Project Namespace . 37 3.1.2 Class Namespace . 39 3.1.3 Lowercase, Uppercase or CamelCase? . 39 3.1.4 Include Guard . 39 3.1.5 C++ Support . 39 1 3.1.6 #include . 39 3.1.7 Type Definition . 40 3.1.8 Object Constructor . 40 3.1.9 Object Destructor . -
Creating Ipsec and SSL/TLS Tunnels in Linux What's New
FACEBOOK | WEBGOAT | TOR | DNS | SLEUTHKIT | PACKETFENCE LINUX JOURNAL ™ UU Getting the Most Out of GCC UU Securing Open-Source Phones SECURITY UU How to Store Passwords Safely UU New Column: Hack and / Since 1994: The Original Magazine of the Linux Community JANUARY 2008 | ISSUE 165 Facebook | WebGoat | Tor | DNS | Sleuthkit | PacketFence | GCC Qtopia SXE VPNs | DNS Sleuthkit PacketFence | Tor | WebGoat Facebook SECURITY UU Learn the Path to a More Secure System UU Use Autopsy and Sleuthkit to Analyse Security Breaches UU Discover Dangerous Flaws in Your DNS Infrastructure JANUARY www.linuxjournal.com 2008 Creating IPsec and SSL/TLS $5.99US $6.99CAN 01 ISSUE + Tunnels in Linux 165 What’s New with Eric Raymond? 0 74470 03102 4 lj023:lj018.qxd 11/12/2007 5:36 PM Page 1 The Straight Talk People SM SINCE 1991 ABERDEEN TRUE QUAD-CORE SERVERS. UP TO 16 INDIVIDUAL CORES. ABERDEEN STONEHAVEN A135 ABERDEEN STONEHAVEN A151 ABERDEEN STONEHAVEN A284 Four Quad-Cores 1U 3TB Quad Quad-Core HPC Server 1U 4TB Dual Quad-Core Server 2U 8TB Dual Quad-Core Server • Up to four Quad-Core AMD Opteron™ 8000 Series processors • Up to two Quad-Core AMD Opteron 2000 Series processors • Up to two Quad-Core AMD Opteron 2000 Series processors • nVIDIA nForce Pro Chipset with 64-Bit Support • nVIDIA nForce Pro Chipset with 64-Bit Support • nVIDIA nForce Pro Chipset with 64-Bit Support • Up to 64GB 667MHz ECC Registered DDR2 SDRAM • Up to 32GB 667MHz ECC Registered DDR2 SDRAM • Up to 64GB 667MHz ECC Registered DDR2 SDRAM • Up to 3 x 1TB (3TB Total) Hot-Swap SATA Hard -
Operating System Components for an Embedded Linux System
INSTITUTEFORREAL-TIMECOMPUTERSYSTEMS TECHNISCHEUNIVERSITATM¨ UNCHEN¨ PROFESSOR G. F ARBER¨ Operating System Components for an Embedded Linux System Martin Hintermann Studienarbeit ii Operating System Components for an Embedded Linux System Studienarbeit Executed at the Institute for Real-Time Computer Systems Technische Universitat¨ Munchen¨ Prof. Dr.-Ing. Georg Farber¨ Advisor: Prof.Dr.rer.nat.habil. Thomas Braunl¨ Author: Martin Hintermann Kirchberg 34 82069 Hohenschaftlarn¨ Submitted in February 2007 iii Acknowledgements At first, i would like to thank my supervisor Prof. Dr. Thomas Braunl¨ for giving me the opportunity to take part at a really interesting project. Many thanks to Thomas Sommer, my project partner, for his contribution to our good work. I also want to thank also Bernard Blackham for his assistance by email and phone at any time. In my opinion, it was a great cooperation of all persons taking part in this project. Abstract Embedded systems can be found in more and more devices. Linux as a free operating system is also becoming more and more important in embedded applications. Linux even replaces other operating systems in certain areas (e.g. mobile phones). This thesis deals with the employment of Linux in embedded systems. Various architectures of embedded systems are introduced and the characteristics of common operating systems for these devices are reviewed. The architecture of Linux is examined by looking at the particular components such as kernel, standard C libraries and POSIX tools for embedded systems. Furthermore, there is a survey of real-time extensions for the Linux kernel. The thesis also treats software development for embedded Linux ranging from the prerequi- sites for compiling software to the debugging of binaries. -
Anatomy of Cross-Compilation Toolchains
Embedded Linux Conference Europe 2016 Anatomy of cross-compilation toolchains Thomas Petazzoni free electrons [email protected] Artwork and Photography by Jason Freeny free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 1/1 Thomas Petazzoni I CTO and Embedded Linux engineer at Free Electrons I Embedded Linux specialists. I Development, consulting and training. I http://free-electrons.com I Contributions I Kernel support for the Marvell Armada ARM SoCs from Marvell I Major contributor to Buildroot, an open-source, simple and fast embedded Linux build system I Living in Toulouse, south west of France Drawing from Frank Tizzoni, at Kernel Recipes 2016 free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 2/1 Disclaimer I I am not a toolchain developer. Not pretending to know everything about toolchains. I Experience gained from building simple toolchains in the context of Buildroot I Purpose of the talk is to give an introduction, not in-depth information. I Focused on simple gcc-based toolchains, and for a number of examples, on ARM specific details. I Will not cover advanced use cases, such as LTO, GRAPHITE optimizations, etc. I Will not cover LLVM free electrons - Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 3/1 What is a cross-compiling toolchain? I A set of tools that allows to build source code into binary code for -
Design and Implementation of Embedded Linux System for Networking Devices
Design and Implementation of Embedded Linux System for Networking Devices Hyun-Joon Cha Distributed Processing and Network Management Laboratory Division of Electrical and Computer Engineering (Computer Science and Engineering) [email protected] POSTECH Design and Implementation of Embedded Linux System (1/24) DP&NM Lab. for Networking Devices Contents • Introduction • Current Embedded Operating Systems • Requirements • Design of Embedded Linux System • Implementation • Conclusions • Future work POSTECH Design and Implementation of Embedded Linux System (2/24) DP&NM Lab. for Networking Devices Introduction • Networking Devices – Devices which has networking capability – Infrastructure of emerging information society • e.g.) Router, Switch, Gateway, Cache engine, Cellular phone, PDA, etc. – Network-capable devices will substitute current dummy and not- connected devices all around – Need more resources, processing power and OSs to coordinate it – Most networking devices use commercial Real-time OSs POSTECH Design and Implementation of Embedded Linux System (3/24) DP&NM Lab. for Networking Devices Introduction – cont’d • Embedded OSs for Networking Devices – Commercial: VxWorks, pSOS, QNX, Nucleus, LynxOS, VRTX, etc. – Free or Almost Free: Xinu, uC/OS, etc. • Frequently Raised Problems from Industry and Academy – No OS approach or using educational OS is harmful – High purchase price and royalty -> affect development cost and device price – Limited target and development platform – OS specific architecture and interface – Technology -
An Analysis of the D Programming Language Sumanth Yenduri University of Mississippi- Long Beach
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CSUSB ScholarWorks Journal of International Technology and Information Management Volume 16 | Issue 3 Article 7 2007 An Analysis of the D Programming Language Sumanth Yenduri University of Mississippi- Long Beach Louise Perkins University of Southern Mississippi- Long Beach Md. Sarder University of Southern Mississippi- Long Beach Follow this and additional works at: http://scholarworks.lib.csusb.edu/jitim Part of the Business Intelligence Commons, E-Commerce Commons, Management Information Systems Commons, Management Sciences and Quantitative Methods Commons, Operational Research Commons, and the Technology and Innovation Commons Recommended Citation Yenduri, Sumanth; Perkins, Louise; and Sarder, Md. (2007) "An Analysis of the D Programming Language," Journal of International Technology and Information Management: Vol. 16: Iss. 3, Article 7. Available at: http://scholarworks.lib.csusb.edu/jitim/vol16/iss3/7 This Article is brought to you for free and open access by CSUSB ScholarWorks. It has been accepted for inclusion in Journal of International Technology and Information Management by an authorized administrator of CSUSB ScholarWorks. For more information, please contact [email protected]. Analysis of Programming Language D Journal of International Technology and Information Management An Analysis of the D Programming Language Sumanth Yenduri Louise Perkins Md. Sarder University of Southern Mississippi - Long Beach ABSTRACT The C language and its derivatives have been some of the dominant higher-level languages used, and the maturity has stemmed several newer languages that, while still relatively young, possess the strength of decades of trials and experimentation with programming concepts. -
C Programming Tutorial
C Programming Tutorial C PROGRAMMING TUTORIAL Simply Easy Learning by tutorialspoint.com tutorialspoint.com i COPYRIGHT & DISCLAIMER NOTICE All the content and graphics on this tutorial are the property of tutorialspoint.com. Any content from tutorialspoint.com or this tutorial may not be redistributed or reproduced in any way, shape, or form without the written permission of tutorialspoint.com. Failure to do so is a violation of copyright laws. This tutorial may contain inaccuracies or errors and tutorialspoint provides no guarantee regarding the accuracy of the site or its contents including this tutorial. If you discover that the tutorialspoint.com site or this tutorial content contains some errors, please contact us at [email protected] ii Table of Contents C Language Overview .............................................................. 1 Facts about C ............................................................................................... 1 Why to use C ? ............................................................................................. 2 C Programs .................................................................................................. 2 C Environment Setup ............................................................... 3 Text Editor ................................................................................................... 3 The C Compiler ............................................................................................ 3 Installation on Unix/Linux ............................................................................