Go to file
Daniel Leung 42b209f816 xtensa: optimize syscall helper functions
The original idea of the syscall helpers is to workaround
an issue where the compiler could not correctly model register
usage with inline functions. It was supposed to be only used
when there are more then 3 arguments to syscalls. However,
during the original MMU code development, the helper got
expanded to cover "less then 2 arguments syscalls" as a way
for debugging syscall handling code and was never removed.
So fix that now by limiting the helper for syscalls with
more than 3 arguments.

Moreover, instead of using one helper with 6 arguments, now
we have separate implementations for both 4 and 5 arguments
syscall helpers. Now the compiler does not have to generate
code to always handle 6 arguments which saves a few code bytes
as there is no need to pass extra zeroes as arguments.

This has been verified to work with xt-clang RI-2022.10.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2024-12-04 14:16:15 -05:00
.github ci: compliance: Rebase on the target branch before running compliance 2024-11-27 06:57:52 -05:00
arch xtensa: optimize syscall helper functions 2024-12-04 14:16:15 -05:00
boards boards: nxp: frdm_mcxa156: Support pwm for NXP frdm_mcxa156 board 2024-12-04 14:15:22 -05:00
cmake cmake: linker: ld: fix duplicate LINK_FLAGS 2024-12-02 22:08:21 +00:00
doc doc: migration-guide-4.1: add note about nxp,imx-lpi2c change 2024-12-04 14:15:52 -05:00
drivers drivers: fuel_gauge: Place API into iterable section 2024-12-04 14:16:06 -05:00
dts dts: bindings: rename nxp,imx-lpi2c compatible 2024-12-04 14:15:52 -05:00
include/zephyr xtensa: optimize syscall helper functions 2024-12-04 14:16:15 -05:00
kernel kernel/sched: correct k_sleep() return value calculation 2024-12-03 02:37:03 +01:00
lib lib: posix: Fix unchecked return value in rwlock 2024-12-04 02:03:20 +01:00
misc
modules drivers: nrf_wifi: Restructure to carve out a new nrf70 bus lib 2024-12-04 14:15:13 -05:00
samples samples, tests: remove usage of space-separated lists 2024-12-04 14:14:53 -05:00
scripts scripts: twister: drop support for space-separated lists 2024-12-04 14:14:53 -05:00
share sysbuild: Add missing option for MCUboot encryption support 2024-10-30 08:54:33 -05:00
snippets Bluetooth: Controller: Replace BT_CTLR with HAS_BT_CTLR 2024-12-03 10:16:44 +01:00
soc dts: bindings: rename nxp,imx-lpi2c compatible 2024-12-04 14:15:52 -05:00
submanifests Revert "modules: nanopb: Move pip dependencies to optional module" 2024-11-29 21:45:54 +01:00
subsys net: http_server: fix header capture on concurrent http2 streams 2024-12-04 14:13:24 -05:00
tests tests: boards: nrf70: Add ztests for bus library 2024-12-04 14:15:13 -05:00
.checkpatch.conf
.clang-format clang-format: add entry for SYS_SEM_LOCK() 2024-10-03 17:07:05 +01:00
.codechecker.yml tests: Add a CodeChecker config file 2024-09-12 10:04:05 +02:00
.codecov.yml
.editorconfig
.gitattributes
.gitignore scripts: ci: check_compliance: Add python lint/format check 2024-11-19 18:36:54 -05:00
.gitlint
.mailmap mailmap: missing entry for Manuel Argüelles 2024-08-05 18:36:50 -04:00
.ruff-excludes.toml scripts: Update and lock ruff 2024-12-03 23:30:00 +00:00
.ruff.toml scripts: Update and lock ruff 2024-12-03 23:30:00 +00:00
.yamllint
CMakeLists.txt cmake: deprecate BUILD_NO_GAP_FILL and introduce type specific gap fill 2024-12-02 11:14:09 +01:00
CODE_OF_CONDUCT.md
CONTRIBUTING.rst
Kconfig
Kconfig.constants
Kconfig.zephyr cmake: deprecate BUILD_NO_GAP_FILL and introduce type specific gap fill 2024-12-02 11:14:09 +01:00
LICENSE
MAINTAINERS.yml MAINTAINERS: update maintainer for MAINTAINERs file 2024-12-04 02:03:04 +01:00
README.rst README: drop the stray link underscores between badges 2024-09-26 15:20:39 +01:00
SDK_VERSION SDK_VERSION: Use Zephyr SDK 0.17.0 2024-10-22 19:04:37 -04:00
VERSION release: Zephyr v4.0.99 2024-11-16 13:40:34 +01:00
version.h.in
west.yml manifest: tf-m: add support for RSA signatures with 2048-bit keys 2024-12-04 16:12:44 +01:00
zephyr-env.cmd
zephyr-env.sh

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <picture>
         <source media="(prefers-color-scheme: dark)" srcset="doc/_static/images/logo-readme-dark.svg">
         <source media="(prefers-color-scheme: light)" srcset="doc/_static/images/logo-readme-light.svg">
         <img src="doc/_static/images/logo-readme-light.svg">
       </picture>
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <a href="https://scorecard.dev/viewer/?uri=github.com/zephyrproject-rtos/zephyr"><img src="https://api.securityscorecards.dev/projects/github.com/zephyrproject-rtos/zephyr/badge"></a>
   <a href="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml?query=branch%3Amain"><img src="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml/badge.svg?event=push"></a>


The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM (Cortex-A,
Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V,
SPARC, MIPS, and a large number of `supported boards`_.

.. below included in doc/introduction/introduction.rst


Getting Started
***************

Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

.. start_include_here

Community Support
*****************

Community support is provided via mailing lists and Discord; see the Resources
below for details.

.. _project-resources:

Resources
*********

Here's a quick summary of resources to help you find your way around:

Getting Started
---------------

  | 📖 `Zephyr Documentation`_
  | 🚀 `Getting Started Guide`_
  | 🙋🏽 `Tips when asking for help`_
  | 💻 `Code samples`_

Code and Development
--------------------

  | 🌐 `Source Code Repository`_
  | 📦 `Releases`_
  | 🤝 `Contribution Guide`_

Community and Support
---------------------

  | 💬 `Discord Server`_ for real-time community discussions
  | 📧 `User mailing list (users@lists.zephyrproject.org)`_
  | 📧 `Developer mailing list (devel@lists.zephyrproject.org)`_
  | 📬 `Other project mailing lists`_
  | 📚 `Project Wiki`_

Issue Tracking and Security
---------------------------

  | 🐛 `GitHub Issues`_
  | 🔒 `Security documentation`_
  | 🛡️ `Security Advisories Repository`_
  | ⚠️ Report security vulnerabilities at vulnerabilities@zephyrproject.org

Additional Resources
--------------------
  | 🌐 `Zephyr Project Website`_
  | 📺 `Zephyr Tech Talks`_

.. _Zephyr Project Website: https://www.zephyrproject.org
.. _Discord Server: https://chat.zephyrproject.org
.. _supported boards: https://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: https://docs.zephyrproject.org
.. _Introduction to Zephyr: https://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: https://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: https://docs.zephyrproject.org/latest/contribute/index.html
.. _Source Code Repository: https://github.com/zephyrproject-rtos/zephyr
.. _GitHub Issues: https://github.com/zephyrproject-rtos/zephyr/issues
.. _Releases: https://github.com/zephyrproject-rtos/zephyr/releases
.. _Project Wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _User mailing list (users@lists.zephyrproject.org): https://lists.zephyrproject.org/g/users
.. _Developer mailing list (devel@lists.zephyrproject.org): https://lists.zephyrproject.org/g/devel
.. _Other project mailing lists: https://lists.zephyrproject.org/g/main/subgroups
.. _Code samples: https://docs.zephyrproject.org/latest/samples/index.html
.. _Security documentation: https://docs.zephyrproject.org/latest/security/index.html
.. _Security Advisories Repository: https://github.com/zephyrproject-rtos/zephyr/security
.. _Tips when asking for help: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help
.. _Zephyr Tech Talks: https://www.zephyrproject.org/tech-talks