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ac6 >> ac6-training >> Operating Systems >> Linux >> Linux User Mode Programming Download Catalog Download as PDF Write us Printable version

D0 Linux User Mode Programming

Programming Embedded Linux Applications for Linux

Programming Embedded Linux Applications  for Linux
formateur
Objectives
  • Discover Linux and its development tools
  • Connect an embedded Linux system in a network
  • Review the Linux boot sequence
  • Mount a remote file system
  • Boot a remote Linux kernel
  • Program and Debug Linux applications
    • Network programming
    • Synchronous and asynchronous input-output
    • Multi-thread programming
    • Inter-process communications
Labs are conducted on target boards, that can be:
    Dual Cortex/A7-based "STM32MP15-DISCO" boards from STMicroelectronics.
    Quad Cortex/A9-based "SabreLite" boards from NXP.
    Quad Cortex/A53-based "imx8q-evk" boards from NXP.
Who should attend this course?
  • Engineers that must create embedded Linux applications
Prerequisite
  • Basic Linux user knowledge
  • Good C programming skills
Course environment
  • Printed course material (in English).
  • One Linux PC for two trainees.
  • One target platform for two trainees.

First Day
Linux overview
  • Linux
  • The various licenses used by Linux (GPL, LGPL, etc.)
  • Linux distributions
Linux for the user
  • The Linux filesystem
  • The Linux shell and scripts
  • The vi editor
  • Basic administration of a Linux system
Linux application development
  • Structure of Linux applications
    • The ELF file format
  • Linux development tools
    • Compiling
    • Documentation
    • Makefiles
    • Integrated Development Environments
  • Creating Linux libraries
    • Static libraries
    • Dynamic libraries
Exercise:  Writing a simple, static and dynamic, library
Second Day
Linux application debugging
  • Software Debug tools
    • Gdb
    • Memory management debug using dmalloc and efence
    • Runtime checks using valgrind
Exercise:  Debug an application and its libraries using gdbserver
Exercise:  Checking memory management using dmalloc and valgrind
Input-Output
  • Standard input-output
    • disk files
    • devices
  • Network programming
    • sockets
    • UDP and TCP protocols
  • Asynchronous input-output
    • Non-blocking I/O
    • Multiplexed (the select and poll APIs)
    • Notified I/O
    • Chained I/O (the aio POSIX API)
Exercise:  Programming a client-server application
Exercise:  Handle several parallel connections using asynchronous I/O
Tracing system calls
  • Trace system calls tools
    • Strace
    • Ltrace
Exercise:  Understanding Strace
Third Day
Time and signal handling
  • Signal handling
    • Signal types
    • Handling a signal
    • Functions usable in a signal handler
    • Signal masking and synchronous handling
  • User Timers
Exercise:  Manage timeouts using signals and timers
Multitask programming
  • Processes
    • The process concept
    • Processes and security
    • Process states
    • Process life-cycle : the "fork" and '"exec" calls
  • POSIX Threads
    • User and kernel threads
    • Thread programming
    • Mutexes and condition variables
    • Barriers
    • Thread-specific data
Exercise:  Managing several clients in parallel using fork
Exercise:  Create a remote server using fork and exec
Exercise:  Managing several clients in parallel using threads
Exercise:  Manage thread-static data in a library
Fourth Day
Memory management and Scheduling
  • Linux Memory Management
    • Virtual and physical memory
    • Pagination and protection
    • Swapping
    • Memory allocation
    • Caches
  • Scheduling in the Linux kernel
    • Context switches
    • The Completely Fair Scheduler
    • Scheduling groups
    • The real-time scheduler
    • Scheduling and SMP (Symmetrical Multi Processors)
Inter Process Communication
  • Inter Process Communication
    • File mapping of files and devices
    • Shared memory
    • Message queues
    • Pipes
  • Task synchronisation
    • Semaphore
    • Mutex
    • Signals
  • The System V IPC (optional, described in appendix)
Exercise:  Handle communications between processes in a multi-process client-server system
Exercise:  Setup timeouts to close dead connections on a server