GNU Toolchain for Atmel ARM Embedded Processors
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The Compilation Toolchain Cross-Compilation for Embedded Systems Prof. Andrea Marongiu ([email protected]) Toolchain The toolchain is a set of development tools used in association with source code or binaries generated from the source code • Enables development in a programming language (e.g., C/C++) • It is used for a lot of operations such as a) Compilation b) Preparing Libraries Most common toolchain is the c) Reading a binary file (or part of it) GNU toolchain which is part of d) Debugging the GNU project • Normally it contains a) Compiler : Generate object files from source code files b) Linker: Link object files together to build a binary file c) Library Archiver: To group a set of object files into a library file d) Debugger: To debug the binary file while running e) And other tools The GNU Toolchain GNU (GNU’s Not Unix) The GNU toolchain has played a vital role in the development of the Linux kernel, BSD, and software for embedded systems. The GNU project produced a set of programming tools. Parts of the toolchain we will use are: -gcc: (GNU Compiler Collection): suite of compilers for many programming languages -binutils: Suite of tools including linker (ld), assembler (gas) -gdb: Code debugging tool -libc: Subset of standard C library (assuming a C compiler). -bash: free Unix shell (Bourne-again shell). Default shell on GNU/Linux systems and Mac OSX. Also ported to Microsoft Windows. -make: automation tool for compilation and build Program development tools The process of converting source code to an executable binary image requires several steps, each with its own tool. -
Riscv-Software-Stack-Tutorial-Hpca2015
Software Tools Bootcamp RISC-V ISA Tutorial — HPCA-21 08 February 2015 Albert Ou UC Berkeley [email protected] Preliminaries To follow along, download these slides at http://riscv.org/tutorial-hpca2015.html 2 Preliminaries . Shell commands are prefixed by a “$” prompt. Due to time constraints, we will not be building everything from source in real-time. - Binaries have been prepared for you in the VM image. - Detailed build steps are documented here for completeness but are not necessary if using the VM. Interactive portions of this tutorial are denoted with: $ echo 'Hello world' . Also as a reminder, these slides are marked with an icon in the upper-right corner: 3 Software Stack . Many possible combinations (and growing) . But here we will focus on the most common workflows for RISC-V software development 4 Agenda 1. riscv-tools infrastructure 2. First Steps 3. Spike + Proxy Kernel 4. QEMU + Linux 5. Advanced Cross-Compiling 6. Yocto/OpenEmbedded 5 riscv-tools — Overview “Meta-repository” with Git submodules for every stable component of the RISC-V software toolchain Submodule Contents riscv-fesvr RISC-V Frontend Server riscv-isa-sim Functional ISA simulator (“Spike”) riscv-qemu Higher-performance ISA simulator riscv-gnu-toolchain binutils, gcc, newlib, glibc, Linux UAPI headers riscv-llvm LLVM, riscv-clang submodule riscv-pk RISC-V Proxy Kernel (riscv-linux) Linux/RISC-V kernel port riscv-tests ISA assembly tests, benchmark suite All listed submodules are hosted under the riscv GitHub organization: https://github.com/riscv 6 riscv-tools — Installation . Build riscv-gnu-toolchain (riscv*-*-elf / newlib target), riscv-fesvr, riscv-isa-sim, and riscv-pk: (pre-installed in VM) $ git clone https://github.com/riscv/riscv-tools $ cd riscv-tools $ git submodule update --init --recursive $ export RISCV=<installation path> $ export PATH=${PATH}:${RISCV}/bin $ ./build.sh . -
Operating Systems and Applications for Embedded Systems >>> Toolchains
>>> Operating Systems And Applications For Embedded Systems >>> Toolchains Name: Mariusz Naumowicz Date: 31 sierpnia 2018 [~]$ _ [1/19] >>> Plan 1. Toolchain Toolchain Main component of GNU toolchain C library Finding a toolchain 2. crosstool-NG crosstool-NG Installing Anatomy of a toolchain Information about cross-compiler Configruation Most interesting features Sysroot Other tools POSIX functions AP [~]$ _ [2/19] >>> Toolchain A toolchain is the set of tools that compiles source code into executables that can run on your target device, and includes a compiler, a linker, and run-time libraries. [1. Toolchain]$ _ [3/19] >>> Main component of GNU toolchain * Binutils: A set of binary utilities including the assembler, and the linker, ld. It is available at http://www.gnu.org/software/binutils/. * GNU Compiler Collection (GCC): These are the compilers for C and other languages which, depending on the version of GCC, include C++, Objective-C, Objective-C++, Java, Fortran, Ada, and Go. They all use a common back-end which produces assembler code which is fed to the GNU assembler. It is available at http://gcc.gnu.org/. * C library: A standardized API based on the POSIX specification which is the principle interface to the operating system kernel from applications. There are several C libraries to consider, see the following section. [1. Toolchain]$ _ [4/19] >>> C library * glibc: Available at http://www.gnu.org/software/libc. It is the standard GNU C library. It is big and, until recently, not very configurable, but it is the most complete implementation of the POSIX API. * eglibc: Available at http://www.eglibc.org/home. -
A.5.1. Linux Programming and the GNU Toolchain
Making the Transition to Linux A Guide to the Linux Command Line Interface for Students Joshua Glatt Making the Transition to Linux: A Guide to the Linux Command Line Interface for Students Joshua Glatt Copyright © 2008 Joshua Glatt Revision History Revision 1.31 14 Sept 2008 jg Various small but useful changes, preparing to revise section on vi Revision 1.30 10 Sept 2008 jg Revised further reading and suggestions, other revisions Revision 1.20 27 Aug 2008 jg Revised first chapter, other revisions Revision 1.10 20 Aug 2008 jg First major revision Revision 1.00 11 Aug 2008 jg First official release (w00t) Revision 0.95 06 Aug 2008 jg Second beta release Revision 0.90 01 Aug 2008 jg First beta release License This document is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License [http:// creativecommons.org/licenses/by-nc-sa/3.0/us/]. Legal Notice This document is distributed in the hope that it will be useful, but it is provided “as is” without express or implied warranty of any kind; without even the implied warranties of merchantability or fitness for a particular purpose. Although the author makes every effort to make this document as complete and as accurate as possible, the author assumes no responsibility for errors or omissions, nor does the author assume any liability whatsoever for incidental or consequential damages in connection with or arising out of the use of the information contained in this document. The author provides links to external websites for informational purposes only and is not responsible for the content of those websites. -
Linux Boot Loaders Compared
Linux Boot Loaders Compared L.C. Benschop May 29, 2003 Copyright c 2002, 2003, L.C. Benschop, Eindhoven, The Netherlands. Per- mission is granted to make verbatim copies of this document. This is version 1.1 which has some minor corrections. Contents 1 introduction 2 2 How Boot Loaders Work 3 2.1 What BIOS does for us . 3 2.2 Parts of a boot loader . 6 2.2.1 boot sector program . 6 2.2.2 second stage of boot loader . 7 2.2.3 Boot loader installer . 8 2.3 Loading the operating system . 8 2.3.1 Loading the Linux kernel . 8 2.3.2 Chain loading . 10 2.4 Configuring the boot loader . 10 3 Example Installations 11 3.1 Example root file system and kernel . 11 3.2 Linux Boot Sector . 11 3.3 LILO . 14 3.4 GNU GRUB . 15 3.5 SYSLINUX . 18 3.6 LOADLIN . 19 3.7 Where Can Boot Loaders Live . 21 1 4 RAM Disks 22 4.1 Living without a RAM disk . 22 4.2 RAM disk devices . 23 4.3 Loading a RAM disk at boot time . 24 4.4 The initial RAM disk . 24 5 Making Diskette Images without Diskettes 25 6 Hard Disk Installation 26 7 CD-ROM Installation 29 8 Conclusions 31 1 introduction If you use Linux on a production system, you will only see it a few times a year. If you are a hobbyist who compiles many kernels or who uses many operating systems, you may see it several times per day. -
GNU MP the GNU Multiple Precision Arithmetic Library Edition 6.2.1 14 November 2020
GNU MP The GNU Multiple Precision Arithmetic Library Edition 6.2.1 14 November 2020 by Torbj¨ornGranlund and the GMP development team This manual describes how to install and use the GNU multiple precision arithmetic library, version 6.2.1. Copyright 1991, 1993-2016, 2018-2020 Free Software Foundation, Inc. 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 the Front-Cover Texts being \A GNU Manual", and with the Back-Cover Texts being \You have freedom to copy and modify this GNU Manual, like GNU software". A copy of the license is included in Appendix C [GNU Free Documentation License], page 132. i Table of Contents GNU MP Copying Conditions :::::::::::::::::::::::::::::::::::: 1 1 Introduction to GNU MP ::::::::::::::::::::::::::::::::::::: 2 1.1 How to use this Manual :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 2 2 Installing GMP ::::::::::::::::::::::::::::::::::::::::::::::::: 3 2.1 Build Options:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 3 2.2 ABI and ISA :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 8 2.3 Notes for Package Builds:::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 11 2.4 Notes for Particular Systems :::::::::::::::::::::::::::::::::::::::::::::::::::::: 12 2.5 Known Build Problems ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 14 2.6 Performance -
Introduction to X86 Assembly
CS342 Computer Security Handout # 5 Prof. Lyn Turbak Monday, Oct. 04, 2010 Wellesley College Lab 4: Introduction to x86 Assembly Reading: Hacking, 0x250, 0x270 Overview Today, we continue to cover low-level programming details that are essential for understanding software vulnerabilities like buffer overflow attacks and format string exploits. You will get exposure to the following: • Understanding conventions used by compiler to translate high-level programs to low-level assembly code (in our case, using Gnu C Compiler (gcc) to compile C programs). • The ability to read low-level assembly code (in our case, Intel x86). • Understanding how assembly code instructions are represented as machine code. • Being able to use gdb (the Gnu Debugger) to read the low-level code produced by gcc and understand its execution. In tutorials based on this handout, we will learn about all of the above in the context of some simple examples. Intel x86 Assembly Language Since Intel x86 processors are ubiquitous, it is helpful to know how to read assembly code for these processors. We will use the following terms: byte refers to 8-bit quantities; short word refers to 16-bit quantities; word refers to 32-bit quantities; and long word refers to 64-bit quantities. There are many registers, but we mostly care about the following: • EAX, EBX, ECX, EDX are 32-bit registers used for general storage. • ESI and EDI are 32-bit indexing registers that are sometimes used for general storage. • ESP is the 32-bit register for the stack pointer, which holds the address of the element currently at the top of the stack. -
ECE 598 – Advanced Operating Systems Lecture 2
ECE 598 { Advanced Operating Systems Lecture 2 Vince Weaver http://www.eece.maine.edu/~vweaver [email protected] 15 January 2015 Announcements • Update on room situation (shouldn't be locked anymore, but not much chance of getting a better room) 1 Building Linux by Hand • Check out with git or download tarball: git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git http://www.kernel.org/pub/linux/kernel/v3.x/ • Configure. make config or make menuconfig Also can copy existing .config and run make oldconfig • Compile. 2 make What does make -j 8 do differently? • Make the modules. make modules • sudo make modules install • copy bzImage to boot, update boot loader 3 Building Linux Automated • If in a distro there are other commands to building a package. • For example on Debian make-kpkg --initrd --rootcmd fakeroot kernel image • Then dpkg -i to install; easier to track 4 Overhead (i.e. why not to do it natively on a Pi) • Size { clean git source tree (x86) 1.8GB, compiled with kernel, 2.5GB, compiled kernel with debug features (x86), 12GB!!! Tarball version with compiled kernel (ARM) 1.5GB • Time to compile { minutes (on fast multicore x86 machine) to hours (18 hours or so on Pi) 5 Linux on the Pi • Mainline kernel, bcm2835 tree Missing some features • Raspberry-pi foundation bcm2708 tree More complete, not upstream 6 Compiling { how does it work? • Take C-code • Turn into assembler • Run assembler to make object (machine language files). Final addresses not necessarily put into place • Run linker (which uses linker script) • Makes some sort of executable. -
Debian Med Integrated Software Environment for All Medical Purposes Based on Debian GNU/Linux
Debian Med Integrated software environment for all medical purposes based on Debian GNU/Linux Andreas Tille Debian OSWC, Malaga 2008 1 / 18 Structure 1 What is Debian Med 2 Realisation 3 Debian Med for service providers 2 / 18 Motivation Free Software in medicine not widely established yet Some subareas well covered Medical data processing more than just practice and patient management Preclinical research of microbiology and genetics as well as medical imaging ! Pool of existing free medical software 3 / 18 Profile of the envisaged user Focus on medicine not computers Unreasonable effort to install upstream programs No interest in administration Interest reduced onto free medical software Easy usage Security and confidence Native-language documentation and interface 4 / 18 Customising Debian Debian > 20000 packages Focus on medical subset of those packages Packaging and integrating other medical software Easy installation and configuration Maintaining a general infrastructure for medical users General overview about free medical software Propagate the idea of Free Software in medicine Completely integrated into Debian - no fork 5 / 18 Special applications 6 / 18 Basic ideas Do not make a separate distribution but make Debian fit for medical care No development of medical software - just smooth integration of third-party software Debian-Developer = missing link between upstream author and user 7 / 18 Debian - adaptable for any purpose? Developed by more than 1000 volunteers Flexible, not bound on commercial interest Strict rules (policy) glue all things together Common interest of each individual developer: Get the best operating system for himself. Some developers work in the field of medicine In contrast to employees of companies every single Debian developer has the freedom and ability to realize his vision Every developer is able to influence the development of Debian - he just has to do it. -
IT Acronyms.Docx
List of computing and IT abbreviations /.—Slashdot 1GL—First-Generation Programming Language 1NF—First Normal Form 10B2—10BASE-2 10B5—10BASE-5 10B-F—10BASE-F 10B-FB—10BASE-FB 10B-FL—10BASE-FL 10B-FP—10BASE-FP 10B-T—10BASE-T 100B-FX—100BASE-FX 100B-T—100BASE-T 100B-TX—100BASE-TX 100BVG—100BASE-VG 286—Intel 80286 processor 2B1Q—2 Binary 1 Quaternary 2GL—Second-Generation Programming Language 2NF—Second Normal Form 3GL—Third-Generation Programming Language 3NF—Third Normal Form 386—Intel 80386 processor 1 486—Intel 80486 processor 4B5BLF—4 Byte 5 Byte Local Fiber 4GL—Fourth-Generation Programming Language 4NF—Fourth Normal Form 5GL—Fifth-Generation Programming Language 5NF—Fifth Normal Form 6NF—Sixth Normal Form 8B10BLF—8 Byte 10 Byte Local Fiber A AAT—Average Access Time AA—Anti-Aliasing AAA—Authentication Authorization, Accounting AABB—Axis Aligned Bounding Box AAC—Advanced Audio Coding AAL—ATM Adaptation Layer AALC—ATM Adaptation Layer Connection AARP—AppleTalk Address Resolution Protocol ABCL—Actor-Based Concurrent Language ABI—Application Binary Interface ABM—Asynchronous Balanced Mode ABR—Area Border Router ABR—Auto Baud-Rate detection ABR—Available Bitrate 2 ABR—Average Bitrate AC—Acoustic Coupler AC—Alternating Current ACD—Automatic Call Distributor ACE—Advanced Computing Environment ACF NCP—Advanced Communications Function—Network Control Program ACID—Atomicity Consistency Isolation Durability ACK—ACKnowledgement ACK—Amsterdam Compiler Kit ACL—Access Control List ACL—Active Current -
CS 331 GDB and X86-64 Assembly Language
CS 331 Spring 2016 GDB and x86-64 Assembly Language I am not a big fan of debuggers for high-level languages. While they are undeniably useful at times, they are no substitute for careful coding. If code is well structured, I usually find it easier to debug analytically (i.e, by staring at it) than by running it through a debugger. In any event, monkey-coding with a debugger is still monkey-coding, and I don’t want to fly in an airplane being guided by monkey-code. The situation in assembly language is quite different. Assembly instructions can be opaque, especially if you aren’t used to programming in assembly language. In addition, I/O at the assembly level is quite complex; printing values at various places in your code is often not an option.. Debuggers are frequently the only way to discover what your code is actually doing. There are nicer assemblers than the gas (gnu assembler) that we will use, but the gas-gdb combination works quite well and is easy to use. In this document we’ll go briefly through the essential commands for gdb. There is more complete documentation available on any of the Linux systems; just type info gdb And, of course, there is no end of documentation online. To assemble your program with hooks for gdb use the hyphen g flag. For example, if your assembly language program is foobar.s you would assemble it wth gcc foobar.s –g –o foobar and then run gdp with gdb foobar You should always have the program visible in an editor that includes line numbers while you run gdb. -
Annual Report
[Credits] Licensed under Creative Commons Attribution license (CC BY 4.0). All text by John Hsieh and Georgia Young, except the Letter from the Executive Director, which is by John Sullivan. Images (name, license, and page location): Wouter Velhelst: cover image; Kori Feener, CC BY-SA 4.0: inside front cover, 2-4, 8, 14-15, 20-21, 23-25, 27-29, 32-33, 36, 40-41; Michele Kowal: 5; Anonymous, CC BY 3.0: 7, 16, 17; Ruben Rodriguez, CC BY-SA 4.0: 10, 13, 34-35; Anonymous, All rights reserved: 16 (top left); Pablo Marinero & Cecilia e. Camero, CC BY 3.0: 17; Free This report highlights activities Software Foundation, CC BY-SA 4.0: 18-19; Tracey Hughes, CC BY-SA 4.0: 30; Jose Cleto Hernandez Munoz, CC BY-SA 3.0: 31, Pixabay/stevepb, CC0: 37. and detailed financials for Fiscal Year 2016 Fonts: Letter Gothic by Roger Roberson; Orator by John Scheppler; Oswald by (October 1, 2015 - September 30, 2016) Vernon Adams, under the OFL; Seravek by Eric Olson; Jura by Daniel Johnson. Created using Inkscape, GIMP, and PDFsam. Designer: Tammy from Creative Joe. 1] LETTER FROM THE EXECUTIVE DIRECTOR 2] OUR MISSION 3] TECH 4] CAMPAIGNS 5] LIBREPLANET 2016 6] LICENSING & COMPLIANCE 7] CONFERENCES & EVENTS 7 8] LEADERSHIP & STAFF [CONTENTS] 9] FINANCIALS 9 10] OUR DONORS CONTENTS our most important [1] measure of success is support for the ideals of LETTER FROM free software... THE EXECUTIVE we have momentum DIRECTOR on our side. LETTER FROM THE 2016 EXECUTIVE DIRECTOR DEAR SUPPORTERS For almost 32 years, the FSF has inspired people around the Charity Navigator gave the FSF its highest rating — four stars — world to be passionate about computer user freedom as an ethical with an overall score of 99.57/100 and a perfect 100 in the issue, and provided vital tools to make the world a better place.