Compiler Driver
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A Compiler-Level Intermediate Representation Based Binary Analysis and Rewriting System
A Compiler-level Intermediate Representation based Binary Analysis and Rewriting System Kapil Anand Matthew Smithson Khaled Elwazeer Aparna Kotha Jim Gruen Nathan Giles Rajeev Barua University of Maryland, College Park {kapil,msmithso,wazeer,akotha,jgruen,barua}@umd.edu Abstract 1. Introduction This paper presents component techniques essential for con- In recent years, there has been a tremendous amount of ac- verting executables to a high-level intermediate representa- tivity in executable-level research targeting varied applica- tion (IR) of an existing compiler. The compiler IR is then tions such as security vulnerability analysis [13, 37], test- employed for three distinct applications: binary rewriting us- ing [17], and binary optimizations [30, 35]. In spite of a sig- ing the compiler’s binary back-end, vulnerability detection nificant overlap in the overall goals of various source-code using source-level symbolic execution, and source-code re- methods and executable-level techniques, several analyses covery using the compiler’s C backend. Our techniques en- and sophisticated transformations that are well-understood able complex high-level transformations not possible in ex- and implemented in source-level infrastructures have yet to isting binary systems, address a major challenge of input- become available in executable frameworks. Many of the derived memory addresses in symbolic execution and are the executable-level tools suggest new techniques for perform- first to enable recovery of a fully functional source-code. ing elementary source-level tasks. For example, PLTO [35] We present techniques to segment the flat address space in proposes a custom alias analysis technique to implement a an executable containing undifferentiated blocks of memory. -
The “Stabs” Debug Format
The \stabs" debug format Julia Menapace, Jim Kingdon, David MacKenzie Cygnus Support Cygnus Support Revision TEXinfo 2017-08-23.19 Copyright c 1992{2021 Free Software Foundation, Inc. Contributed by Cygnus Support. Written by Julia Menapace, Jim Kingdon, and David MacKenzie. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled \GNU Free Documentation License". i Table of Contents 1 Overview of Stabs ::::::::::::::::::::::::::::::: 1 1.1 Overview of Debugging Information Flow ::::::::::::::::::::::: 1 1.2 Overview of Stab Format ::::::::::::::::::::::::::::::::::::::: 1 1.3 The String Field :::::::::::::::::::::::::::::::::::::::::::::::: 2 1.4 A Simple Example in C Source ::::::::::::::::::::::::::::::::: 3 1.5 The Simple Example at the Assembly Level ::::::::::::::::::::: 4 2 Encoding the Structure of the Program ::::::: 7 2.1 Main Program :::::::::::::::::::::::::::::::::::::::::::::::::: 7 2.2 Paths and Names of the Source Files :::::::::::::::::::::::::::: 7 2.3 Names of Include Files:::::::::::::::::::::::::::::::::::::::::: 8 2.4 Line Numbers :::::::::::::::::::::::::::::::::::::::::::::::::: 9 2.5 Procedures ::::::::::::::::::::::::::::::::::::::::::::::::::::: 9 2.6 Nested Procedures::::::::::::::::::::::::::::::::::::::::::::: 11 2.7 Block Structure -
Toward IFVM Virtual Machine: a Model Driven IFML Interpretation
Toward IFVM Virtual Machine: A Model Driven IFML Interpretation Sara Gotti and Samir Mbarki MISC Laboratory, Faculty of Sciences, Ibn Tofail University, BP 133, Kenitra, Morocco Keywords: Interaction Flow Modelling Language IFML, Model Execution, Unified Modeling Language (UML), IFML Execution, Model Driven Architecture MDA, Bytecode, Virtual Machine, Model Interpretation, Model Compilation, Platform Independent Model PIM, User Interfaces, Front End. Abstract: UML is the first international modeling language standardized since 1997. It aims at providing a standard way to visualize the design of a system, but it can't model the complex design of user interfaces and interactions. However, according to MDA approach, it is necessary to apply the concept of abstract models to user interfaces too. IFML is the OMG adopted (in March 2013) standard Interaction Flow Modeling Language designed for abstractly expressing the content, user interaction and control behaviour of the software applications front-end. IFML is a platform independent language, it has been designed with an executable semantic and it can be mapped easily into executable applications for various platforms and devices. In this article we present an approach to execute the IFML. We introduce a IFVM virtual machine which translate the IFML models into bytecode that will be interpreted by the java virtual machine. 1 INTRODUCTION a fundamental standard fUML (OMG, 2011), which is a subset of UML that contains the most relevant The software development has been affected by the part of class diagrams for modeling the data apparition of the MDA (OMG, 2015) approach. The structure and activity diagrams to specify system trend of the 21st century (BRAMBILLA et al., behavior; it contains all UML elements that are 2014) which has allowed developers to build their helpful for the execution of the models. -
Portable Executable File Format
Chapter 11 Portable Executable File Format IN THIS CHAPTER + Understanding the structure of a PE file + Talking in terms of RVAs + Detailing the PE format + The importance of indices in the data directory + How the loader interprets a PE file MICROSOFT INTRODUCED A NEW executable file format with Windows NT. This for- mat is called the Portable Executable (PE) format because it is supposed to be portable across all 32-bit operating systems by Microsoft. The same PE format exe- cutable can be executed on any version of Windows NT, Windows 95, and Win32s. Also, the same format is used for executables for Windows NT running on proces- sors other than Intel x86, such as MIPS, Alpha, and Power PC. The 32-bit DLLs and Windows NT device drivers also follow the same PE format. It is helpful to understand the PE file format because PE files are almost identi- cal on disk and in RAM. Learning about the PE format is also helpful for under- standing many operating system concepts. For example, how operating system loader works to support dynamic linking of DLL functions, the data structures in- volved in dynamic linking such as import table, export table, and so on. The PE format is not really undocumented. The WINNT.H file has several struc- ture definitions representing the PE format. The Microsoft Developer's Network (MSDN) CD-ROMs contain several descriptions of the PE format. However, these descriptions are in bits and pieces, and are by no means complete. In this chapter, we try to give you a comprehensive picture of the PE format. -
Common Object File Format (COFF)
Application Report SPRAAO8–April 2009 Common Object File Format ..................................................................................................................................................... ABSTRACT The assembler and link step create object files in common object file format (COFF). COFF is an implementation of an object file format of the same name that was developed by AT&T for use on UNIX-based systems. This format encourages modular programming and provides powerful and flexible methods for managing code segments and target system memory. This appendix contains technical details about the Texas Instruments COFF object file structure. Much of this information pertains to the symbolic debugging information that is produced by the C compiler. The purpose of this application note is to provide supplementary information on the internal format of COFF object files. Topic .................................................................................................. Page 1 COFF File Structure .................................................................... 2 2 File Header Structure .................................................................. 4 3 Optional File Header Format ........................................................ 5 4 Section Header Structure............................................................. 5 5 Structuring Relocation Information ............................................... 7 6 Symbol Table Structure and Content........................................... 11 SPRAAO8–April 2009 -
CS429: Computer Organization and Architecture Linking I & II
CS429: Computer Organization and Architecture Linking I & II Dr. Bill Young Department of Computer Sciences University of Texas at Austin Last updated: April 5, 2018 at 09:23 CS429 Slideset 23: 1 Linking I A Simplistic Translation Scheme m.c ASCII source file Problems: Efficiency: small change Compiler requires complete re-compilation. m.s Modularity: hard to share common functions (e.g., printf). Assembler Solution: Static linker (or Binary executable object file linker). p (memory image on disk) CS429 Slideset 23: 2 Linking I Better Scheme Using a Linker Linking is the process of m.c a.c ASCII source files combining various pieces of code and data into a Compiler Compiler single file that can be loaded (copied) into m.s a.s memory and executed. Linking could happen at: Assembler Assembler compile time; Separately compiled m.o a.o load time; relocatable object files run time. Linker (ld) Must somehow tell a Executable object file module about symbols p (code and data for all functions defined in m.c and a.c) from other modules. CS429 Slideset 23: 3 Linking I Linking A linker takes representations of separate program modules and combines them into a single executable. This involves two primary steps: 1 Symbol resolution: associate each symbol reference throughout the set of modules with a single symbol definition. 2 Relocation: associate a memory location with each symbol definition, and modify each reference to point to that location. CS429 Slideset 23: 4 Linking I Translating the Example Program A compiler driver coordinates all steps in the translation and linking process. -
Toolchains Instructor: Prabal Dutta Date: October 2, 2012
EECS 373: Design of Microprocessor-Based Systems Fall 2012 Lecture 3: Toolchains Instructor: Prabal Dutta Date: October 2, 2012 Note: Unless otherwise specified, these notes assume: (i) an ARM Cortex-M3 processor operating in little endian mode; (ii) the ARM EABI application binary interface; and (iii) the GNU GCC toolchain. Toolchains A complete software toolchain includes programs to convert source code into binary machine code, link together separately assembled/compiled code modules, disassemble the binaries, and convert their formats. Binary program file (.bin) Assembly Object Executable files (.s) files (.o) image file objcopy ld (linker) as objdump (assembler) Memory layout Disassembled Linker code (.lst) script (.ld) Figure 0.1: Assembler Toolchain. A typical GNU (GNU's Not Unix) assembler toolchain includes several programs that interact as shown in Figure 0.1 and perform the following functions: • as is the assembler and it converts human-readable assembly language programs into binary machine language code. It typically takes as input .s assembly files and outputs .o object files. • ld is the linker and it is used to combine multiple object files by resolving their external symbol references and relocating their data sections, and outputting a single executable file. It typically takes as input .o object files and .ld linker scripts and outputs .out executable files. • objcopy is a translation utility that copies and converts the contents of an object file from one format (e.g. .out) another (e.g. .bin). • objdump is a disassembler but it can also display various other information about object files. It is often used to disassemble binary files (e.g. -
Coqjvm: an Executable Specification of the Java Virtual Machine Using
CoqJVM: An Executable Specification of the Java Virtual Machine using Dependent Types Robert Atkey LFCS, School of Informatics, University of Edinburgh Mayfield Rd, Edinburgh EH9 3JZ, UK [email protected] Abstract. We describe an executable specification of the Java Virtual Machine (JVM) within the Coq proof assistant. The principal features of the development are that it is executable, meaning that it can be tested against a real JVM to gain confidence in the correctness of the specification; and that it has been written with heavy use of dependent types, this is both to structure the model in a useful way, and to constrain the model to prevent spurious partiality. We describe the structure of the formalisation and the way in which we have used dependent types. 1 Introduction Large scale formalisations of programming languages and systems in mechanised theorem provers have recently become popular [4–6, 9]. In this paper, we describe a formalisation of the Java virtual machine (JVM) [8] in the Coq proof assistant [11]. The principal features of this formalisation are that it is executable, meaning that a purely functional JVM can be extracted from the Coq development and – with some O’Caml glue code – executed on real Java bytecode output from the Java compiler; and that it is structured using dependent types. The motivation for this development is to act as a basis for certified consumer- side Proof-Carrying Code (PCC) [12]. We aim to prove the soundness of program logics and correctness of proof checkers against the model, and extract the proof checkers to produce certified stand-alone tools. -
Chapter 6: the Linker
6. The Linker 6-1 Chapter 6: The Linker References: • Brian W. Kernighan / Dennis M. Ritchie: The C Programming Language, 2nd Ed. Prentice-Hall, 1988. • Samuel P. Harbison / Guy L. Steele Jr.: C — A Reference Manual, 4th Ed. Prentice-Hall, 1995. • Online Documentation of Microsoft Visual C++ 6.0 (Standard Edition): MSDN Library: Visual Studio 6.0 release. • Horst Wettstein: Assemblierer und Binder (in German). Carl Hanser Verlag, 1979. • Peter Rechenberg, Gustav Pomberger (Eds.): Informatik-Handbuch (in German). Carl Hanser Verlag, 1997. Kapitel 12: Systemsoftware (H. M¨ossenb¨ock). Stefan Brass: Computer Science III Universit¨atGiessen, 2001 6. The Linker 6-2 Overview ' $ 1. Introduction (Overview) & % 2. Object Files, Libraries, and the Linker 3. Make 4. Dynamic Linking Stefan Brass: Computer Science III Universit¨atGiessen, 2001 6. The Linker 6-3 Introduction (1) • Often, a program consists of several modules which are separately compiled. Reasons are: The program is large. Even with fast computers, editing and compiling a single file with a million lines leads to unnecessary delays. The program is developed by several people. Different programmers cannot easily edit the same file at the same time. (There is software for collaborative work that permits that, but it is still a research topic.) A large program is easier to understand if it is divided into natural units. E.g. each module defines one data type with its operations. Stefan Brass: Computer Science III Universit¨atGiessen, 2001 6. The Linker 6-4 Introduction (2) • Reasons for splitting a program into several source files (continued): The same module might be used in different pro- grams (e.g. -
Coldfire Cross Development with GNU Toolchain and Eclipse
ColdFire cross development with GNU Toolchain and Eclipse Version 1.0 embedded development tools Acknowledgements Ronetix GmbH Waidhausenstrasse 13/5 1140 Vienna Austria Tel: +43-720-500315 +43-1962-720 500315 Fax: +43-1- 8174 955 3464 Internet: www.ronetix.at E-Mail [email protected] Acknowledgments: ColdFire is trademark of Freescale Ltd. Windows, Win32, Windows CE are trademarks of Microsoft Corporation. Ethernet is a trademark of XEROX. All other trademarks are trademarks of their respective companies. © 2005-2008 RONETIX All rights reserved. ColdFire cross development 2 www.ronetix.at Acknowledgements Change log April 2007 - First release ColdFire cross development 3 www.ronetix.at Contents 1 INTRODUCTION ...........................................................................................................................5 2 PEEDI COLDFIRE EMULATOR INSTALLATION........................................................................6 3 TOOLSET INSTALLATION ON LINUX ........................................................................................7 4 TOOLSET INSTALLATION ON WINDOWS...............................................................................10 5 WORKING WITH ECLIPSE.........................................................................................................11 5.1 Adding a project ....................................................................................................................11 5.2 Configuring and working with the Eclipse built-in debugger ...........................................16 -
An Executable Intermediate Representation for Retargetable Compilation and High-Level Code Optimization
An Executable Intermediate Representation for Retargetable Compilation and High-Level Code Optimization Rainer Leupers, Oliver Wahlen, Manuel Hohenauer, Tim Kogel Peter Marwedel Aachen University of Technology (RWTH) University of Dortmund Integrated Signal Processing Systems Dept. of Computer Science 12 Aachen, Germany Dortmund, Germany Email: [email protected] Email: [email protected] Abstract— Due to fast time-to-market and IP reuse require- potential parallelism and which are the usual input format for ments, an increasing amount of the functionality of embedded code generation and scheduling algorithms. HW/SW systems is implemented in software. As a consequence, For the purpose of hardware synthesis from C, the IR software programming languages like C play an important role in system specification, design, and validation. Besides many other generation can be viewed as a specification refinement that advantages, the C language offers executable specifications, with lowers an initially high-level specification in order to get clear semantics and high simulation speed. However, virtually closer to the final implementation, while retaining the original any tool operating on C specifications has to convert C sources semantics. We will explain later, how this refinement step can into some intermediate representation (IR), during which the be validated. executability is normally lost. In order to overcome this problem, this paper describes a novel IR format, called IR-C, for the use However, the executability of C, which is one of its major in C based design tools, which combines the simplicity of three advantages, is usually lost after an IR has been generated. address code with the executability of C. -
Transparent Dynamic Optimization: the Design and Implementation of Dynamo
Transparent Dynamic Optimization: The Design and Implementation of Dynamo Vasanth Bala, Evelyn Duesterwald, Sanjeev Banerjia HP Laboratories Cambridge HPL-1999-78 June, 1999 E-mail: [email protected] dynamic Dynamic optimization refers to the runtime optimization optimization, of a native program binary. This report describes the compiler, design and implementation of Dynamo, a prototype trace selection, dynamic optimizer that is capable of optimizing a native binary translation program binary at runtime. Dynamo is a realistic implementation, not a simulation, that is written entirely in user-level software, and runs on a PA-RISC machine under the HPUX operating system. Dynamo does not depend on any special programming language, compiler, operating system or hardware support. Contrary to intuition, we demonstrate that it is possible to use a piece of software to improve the performance of a native, statically optimized program binary, while it is executing. Dynamo not only speeds up real application programs, its performance improvement is often quite significant. For example, the performance of many +O2 optimized SPECint95 binaries running under Dynamo is comparable to the performance of their +O4 optimized version running without Dynamo. Internal Accession Date Only Ó Copyright Hewlett-Packard Company 1999 Contents 1 INTRODUCTION ........................................................................................... 7 2 RELATED WORK ......................................................................................... 9 3 OVERVIEW