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The Open On-Chip Debugger
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Antonio Borneo 8a37230226 checkpatch: exclude gerrit's Change-Id line from commit description
Checkpatch rejects patches that have empty commit description and
logs them with:
	WARNING:COMMIT_MESSAGE: Missing commit description - Add an appropriate one
But if the patch has a gerrit's Change-Id line placed before the
line Signed-off-by, then checkpatch considers the Change-Id line
as a valid commit description text.

Use the Change-Id tag as a marker of the end of the commit message,
thus not counting its line as part of the commit description.

This patch is not relevant for the Linux kernel development process
as gerrit is not involved and the Change-Id tag is rejected. But
other projects, like OpenOCD, base the development on gerrit and
reuse kernel's checkpatch with flag '--ignore GERRIT_CHANGE_ID'.

This patch has been refused [1] in Linux upstream because it has
not been considered relevant for that project.
Let's take it as another add-on in OpenOCD checkpatch.

Change-Id: I3b55b8fffa07ce67177c108e7c9554ca46674246
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Link: [1] https://lore.kernel.org/lkml/20230410100255.16755-1-borneo.antonio@gmail.com/
Reviewed-on: https://review.openocd.org/c/openocd/+/8539
Tested-by: jenkins
2024-11-16 14:25:35 +00:00
.github/workflows github/workflow: build libjaylink from source 2023-04-01 16:11:31 +00:00
contrib contrib: convert 'unsigned' to 'unsigned int' 2024-11-09 21:05:18 +00:00
doc stlink: deprecate HLA support 2024-11-02 21:01:07 +00:00
jimtcl@f160866171 jimtcl: update to version 0.83 2024-10-05 15:53:02 +00:00
LICENSES LICENSES: Add the Apache-2.0 license for standalone files 2024-01-21 21:26:53 +00:00
src autoconf: Add support for code coverage 2024-11-16 14:18:57 +00:00
tcl tcl/target/bl702: implement full software reset 2024-11-09 21:06:05 +00:00
testing drivers/bcm2835gpio: Migrate to adapter gpio commands 2022-09-13 22:17:14 +00:00
tools checkpatch: exclude gerrit's Change-Id line from commit description 2024-11-16 14:25:35 +00:00
.checkpatch.conf checkpatch: enable CAMELCASE test 2022-09-18 08:20:56 +00:00
.gitignore autoconf: Add support for code coverage 2024-11-16 14:18:57 +00:00
.gitmodules Makefile.am: generate ChangeLog with git log instead of git2cl 2024-11-16 14:20:06 +00:00
.travis.yml openocd: fix syntax of SPDX tags 2022-09-13 22:03:24 +00:00
AUTHORS AUTHORS: Refer to source code and Git history 2024-07-13 16:46:06 +00:00
AUTHORS.ChangeLog Add AUTHORS.ChangeLog file suitable to be passed to 'svn2cl --authors'. 2009-07-02 11:18:45 +00:00
bootstrap Make bootstrap more robust 2024-11-16 14:20:48 +00:00
BUGS docs: update OpenOCD url's to openocd.org domain 2015-04-16 20:28:21 +01:00
ChangeLog fix typos in documentation 2009-11-26 10:12:22 -08:00
config_subdir.m4 jimtcl: add configure flag for build maintainer mode 2022-03-12 09:47:18 +00:00
configure.ac autoconf: Add support for code coverage 2024-11-16 14:18:57 +00:00
COPYING LICENSES: add 'license-rules.txt' 2021-04-11 20:52:43 +01:00
Doxyfile.in Doxyfile.in: exclude libjaylink from doxygen 2021-01-13 11:33:14 +00:00
guess-rev.sh guess-rev.sh: fix minor typo 2019-05-23 22:14:30 +01:00
HACKING autoconf: Add support for code coverage 2024-11-16 14:18:57 +00:00
Makefile.am Makefile.am: generate ChangeLog with git log instead of git2cl 2024-11-16 14:20:06 +00:00
NEWS Restore normal development cycle 2023-01-15 02:33:06 +03:00
NEWS-0.2.0 whitespace cleanup, mostly for docs 2009-12-30 11:51:29 -08:00
NEWS-0.3.0 Version 0.4.0-dev 2009-11-04 19:44:36 -08:00
NEWS-0.4.0 Open the merge window for the 0.5.0 release cycle. 2010-02-21 13:27:37 -08:00
NEWS-0.5.0 coding style: doc: remove empty lines at end of text files 2020-02-24 10:31:29 +00:00
NEWS-0.6.0 Restore -dev suffix, archive NEWS file, add new blank NEWS file - start 2012-09-07 11:04:05 +02:00
NEWS-0.7.0 Restore normal development cycle 2013-05-05 10:45:03 +02:00
NEWS-0.8.0 Restore normal development cycle 2014-04-27 15:07:08 +04:00
NEWS-0.9.0 Restore normal development cycle 2015-05-18 00:34:18 +03:00
NEWS-0.10.0 Restore normal development cycle 2017-01-23 00:46:51 +03:00
NEWS-0.11.0 Restore normal development cycle 2021-03-07 15:44:45 +03:00
NEWS-0.12.0 Restore normal development cycle 2023-01-15 02:33:06 +03:00
NEWTAPS Fix spelling of ARM Cortex 2016-05-20 21:38:03 +01:00
README README: Use proper Markdown syntax 2024-09-15 09:20:31 +00:00
README.macOS openocd: drop dependency from libusb0 2021-04-05 23:25:34 +01:00
README.Windows doc: fix broken link to IgnoreHardwareSerialNumber in README.Windows 2023-01-28 15:17:48 +00:00
TODO TODO: remove outdated AT91SAM92xx entry 2023-03-18 17:30:46 +00:00
uncrustify.cfg uncrustify.cfg: add SPDX license 2024-08-02 16:01:12 +00:00

# Welcome to OpenOCD!

OpenOCD provides on-chip programming and debugging support with a
layered architecture of JTAG interface and TAP support including:

- (X)SVF playback to facilitate automated boundary scan and FPGA/CPLD
  programming;
- debug target support (e.g. ARM, MIPS): single-stepping,
  breakpoints/watchpoints, gprof profiling, etc;
- flash chip drivers (e.g. CFI, NAND, internal flash);
- embedded TCL interpreter for easy scripting.

Several network interfaces are available for interacting with OpenOCD:
telnet, TCL, and GDB. The GDB server enables OpenOCD to function as a
"remote target" for source-level debugging of embedded systems using
the GNU GDB program (and the others who talk GDB protocol, e.g. IDA
Pro).

This README file contains an overview of the following topics:

- quickstart instructions,
- how to find and build more OpenOCD documentation,
- list of the supported hardware,
- the installation and build process,
- packaging tips.


# Quickstart for the impatient

If you have a popular board then just start OpenOCD with its config,
e.g.:

    openocd -f board/stm32f4discovery.cfg

If you are connecting a particular adapter with some specific target,
you need to source both the jtag interface and the target configs,
e.g.:

```
openocd -f interface/ftdi/jtagkey2.cfg -c "transport select jtag" \
        -f target/ti_calypso.cfg
```

```
openocd -f interface/stlink.cfg -c "transport select hla_swd" \
        -f target/stm32l0.cfg
```

After OpenOCD startup, connect GDB with

    (gdb) target extended-remote localhost:3333


# OpenOCD Documentation

In addition to the in-tree documentation, the latest manuals may be
viewed online at the following URLs:

  OpenOCD User's Guide:
    http://openocd.org/doc/html/index.html

  OpenOCD Developer's Manual:
    http://openocd.org/doc/doxygen/html/index.html

These reflect the latest development versions, so the following section
introduces how to build the complete documentation from the package.

For more information, refer to these documents or contact the developers
by subscribing to the OpenOCD developer mailing list:

	openocd-devel@lists.sourceforge.net

## Building the OpenOCD Documentation

By default the OpenOCD build process prepares documentation in the
"Info format" and installs it the standard way, so that `info openocd`
can access it.

Additionally, the OpenOCD User's Guide can be produced in the
following different formats:

If `PDFVIEWER` is set, this creates and views the PDF User Guide.

    make pdf && ${PDFVIEWER} doc/openocd.pdf

If `HTMLVIEWER` is set, this creates and views the HTML User Guide.

    make html && ${HTMLVIEWER} doc/openocd.html/index.html

The OpenOCD Developer Manual contains information about the internal
architecture and other details about the code:

Note: make sure doxygen is installed, type doxygen --version

    make doxygen && ${HTMLVIEWER} doxygen/index.html


# Supported hardware

## JTAG adapters

AM335x, ARM-JTAG-EW, ARM-USB-OCD, ARM-USB-TINY, AT91RM9200, axm0432, BCM2835,
Bus Blaster, Buspirate, Cadence DPI, Cadence vdebug, Chameleon, CMSIS-DAP,
Cortino, Cypress KitProg, DENX, Digilent JTAG-SMT2, DLC 5, DLP-USB1232H,
embedded projects, Espressif USB JTAG Programmer,
eStick, FlashLINK, FlossJTAG, Flyswatter, Flyswatter2,
FTDI FT232R, Gateworks, Hoegl, ICDI, ICEBear, J-Link, JTAG VPI, JTAGkey,
JTAGkey2, JTAG-lock-pick, KT-Link, Linux GPIOD, Lisa/L, LPC1768-Stick,
Mellanox rshim, MiniModule, NGX, Nuvoton Nu-Link, Nu-Link2, NXHX, NXP IMX GPIO,
OOCDLink, Opendous, OpenJTAG, Openmoko, OpenRD, OSBDM, Presto, Redbee,
Remote Bitbang, RLink, SheevaPlug devkit, Stellaris evkits,
ST-LINK (SWO tracing supported), STM32-PerformanceStick, STR9-comStick,
sysfsgpio, Tigard, TI XDS110, TUMPA, Turtelizer, ULINK, USB-A9260, USB-Blaster,
USB-JTAG, USBprog, VPACLink, VSLLink, Wiggler, XDS100v2, Xilinx XVC/PCIe,
Xverve.

## Debug targets

ARM: AArch64, ARM11, ARM7, ARM9, Cortex-A/R (v7-A/R), Cortex-M (ARMv{6/7/8}-M),
FA526, Feroceon/Dragonite, XScale.
ARCv2, AVR32, DSP563xx, DSP5680xx, EnSilica eSi-RISC, EJTAG (MIPS32, MIPS64),
ESP32, ESP32-S2, ESP32-S3, Intel Quark, LS102x-SAP, RISC-V, ST STM8,
Xtensa.

## Flash drivers

ADUC702x, AT91SAM, AT91SAM9 (NAND), ATH79, ATmega128RFA1, Atmel SAM, AVR, CFI,
DSP5680xx, EFM32, EM357, eSi-RISC, eSi-TSMC, EZR32HG, FM3, FM4, Freedom E SPI,
GD32, i.MX31, Kinetis, LPC8xx/LPC1xxx/LPC2xxx/LPC541xx, LPC2900, LPC3180, LPC32xx,
LPCSPIFI, Marvell QSPI, MAX32, Milandr, MXC, NIIET, nRF51, nRF52 , NuMicro,
NUC910, Nuvoton NPCX, onsemi RSL10, Orion/Kirkwood, PIC32mx, PSoC4/5LP/6,
Raspberry RP2040, Renesas RPC HF and SH QSPI,
S3C24xx, S3C6400, SiM3x, SiFive Freedom E, Stellaris, ST BlueNRG, STM32,
STM32 QUAD/OCTO-SPI for Flash/FRAM/EEPROM, STMSMI, STR7x, STR9x, SWM050,
TI CC13xx, TI CC26xx, TI CC32xx, TI MSP432, Winner Micro w600, Xilinx XCF,
XMC1xxx, XMC4xxx.


# Installing OpenOCD

## A Note to OpenOCD Users

If you would rather be working "with" OpenOCD rather than "on" it, your
operating system or JTAG interface supplier may provide binaries for
you in a convenient-enough package.

Such packages may be more stable than git mainline, where
bleeding-edge development takes place. These "Packagers" produce
binary releases of OpenOCD after the developers produces new "release"
versions of the source code. Previous versions of OpenOCD cannot be
used to diagnose problems with the current release, so users are
encouraged to keep in contact with their distribution package
maintainers or interface vendors to ensure suitable upgrades appear
regularly.

Users of these binary versions of OpenOCD must contact their Packager to
ask for support or newer versions of the binaries; the OpenOCD
developers do not support packages directly.

## A Note to OpenOCD Packagers

You are a PACKAGER of OpenOCD if you:

- Sell dongles and include pre-built binaries;
- Supply tools or IDEs (a development solution integrating OpenOCD);
- Build packages (e.g. RPM or DEB files for a GNU/Linux distribution).

As a PACKAGER, you will experience first reports of most issues.
When you fix those problems for your users, your solution may help
prevent hundreds (if not thousands) of other questions from other users.

If something does not work for you, please work to inform the OpenOCD
developers know how to improve the system or documentation to avoid
future problems, and follow-up to help us ensure the issue will be fully
resolved in our future releases.

That said, the OpenOCD developers would also like you to follow a few
suggestions:

- Send patches, including config files, upstream, participate in the
  discussions;
- Enable all the options OpenOCD supports, even those unrelated to your
  particular hardware;
- Use "ftdi" interface adapter driver for the FTDI-based devices.


# Building OpenOCD

The INSTALL file contains generic instructions for running `configure`
and compiling the OpenOCD source code. That file is provided by
default for all GNU autotools packages. If you are not familiar with
the GNU autotools, then you should read those instructions first.

The remainder of this document tries to provide some instructions for
those looking for a quick-install.

## OpenOCD Dependencies

GCC or Clang is currently required to build OpenOCD. The developers
have begun to enforce strict code warnings (-Wall, -Werror, -Wextra,
and more) and use C99-specific features: inline functions, named
initializers, mixing declarations with code, and other tricks. While
it may be possible to use other compilers, they must be somewhat
modern and could require extending support to conditionally remove
GCC-specific extensions.

You'll also need:

- make
- libtool
- pkg-config >= 0.23 or pkgconf

OpenOCD uses jimtcl library; build from git can retrieve jimtcl as git
submodule.

Additionally, for building from git:

- autoconf >= 2.69
- automake >= 1.14
- texinfo >= 5.0

Optional USB-based adapter drivers need libusb-1.0.

Optional USB-Blaster, ASIX Presto and OpenJTAG interface adapter
drivers need:
  - libftdi: http://www.intra2net.com/en/developer/libftdi/index.php

Optional CMSIS-DAP adapter driver needs HIDAPI library.

Optional linuxgpiod adapter driver needs libgpiod library.

Optional J-Link adapter driver needs libjaylink library.

Optional ARM disassembly needs capstone library.

Optional development script checkpatch needs:

- perl
- python
- python-ply

## Permissions delegation

Running OpenOCD with root/administrative permissions is strongly
discouraged for security reasons.

For USB devices on GNU/Linux you should use the contrib/60-openocd.rules
file. It probably belongs somewhere in /etc/udev/rules.d, but
consult your operating system documentation to be sure. Do not forget
to add yourself to the "plugdev" group.

For parallel port adapters on GNU/Linux and FreeBSD please change your
"ppdev" (parport* or ppi*) device node permissions accordingly.

For parport adapters on Windows you need to run install_giveio.bat
(it's also possible to use "ioperm" with Cygwin instead) to give
ordinary users permissions for accessing the "LPT" registers directly.

## Compiling OpenOCD

To build OpenOCD, use the following sequence of commands:

    ./bootstrap
    ./configure [options]
    make
    sudo make install

The `bootstrap` command is only necessary when building from the Git repository. The `configure` step generates the Makefiles required to build
OpenOCD, usually with one or more options provided to it. The first
'make' step will build OpenOCD and place the final executable in
'./src/'. The final (optional) step, `make install`, places all of
the files in the required location.

To see the list of all the supported options, run `./configure --help`

## Cross-compiling Options

Cross-compiling is supported the standard autotools way, you just need
to specify the cross-compiling target triplet in the --host option,
e.g. for cross-building for Windows 32-bit with MinGW on Debian:

    ./configure --host=i686-w64-mingw32 [options]

To make pkg-config work nicely for cross-compiling, you might need an
additional wrapper script as described at

    https://autotools.io/pkgconfig/cross-compiling.html

This is needed to tell pkg-config where to look for the target
libraries that OpenOCD depends on. Alternatively, you can specify
`*_CFLAGS` and `*_LIBS` environment variables directly, see `./configure
--help` for the details.

For a more or less complete script that does all this for you, see

    contrib/cross-build.sh

## Parallel Port Dongles

If you want to access the parallel port using the PPDEV interface you
have to specify both `--enable-parport` and `--enable-parport-ppdev`, since
the later option is an option to the parport driver.

The same is true for the `--enable-parport-giveio` option, you have to
use both the `--enable-parport` and the `--enable-parport-giveio` option
if you want to use giveio instead of ioperm parallel port access
method.


# Obtaining OpenOCD From GIT

You can download the current GIT version with a GIT client of your
choice from the main repository:

    git://git.code.sf.net/p/openocd/code

You may prefer to use a mirror:

    http://repo.or.cz/r/openocd.git
    git://repo.or.cz/openocd.git

Using the GIT command line client, you might use the following command
to set up a local copy of the current repository (make sure there is no
directory called "openocd" in the current directory):

    git clone git://git.code.sf.net/p/openocd/code openocd

Then you can update that at your convenience using `git pull`.

There is also a gitweb interface, which you can use either to browse
the repository or to download arbitrary snapshots using HTTP:

    http://repo.or.cz/w/openocd.git

Snapshots are compressed tarballs of the source tree, about 1.3 MBytes
each at this writing.