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Carlo Caione 3a48365bab irq: Fix IRQ vector table relocation
The generation of the software ISR table and the IRQ vector table
(respectively generated by CONFIG_GEN_SW_ISR_TABLE and
CONFIG_GEN_IRQ_VECTOR_TABLE) should (in theory) go through three stages:

1. A placeholder table is generated in arch/common/isr_tables.c and
   placed in an orphaned .gnu.linkonce.{irq_vector_table, sw_isr_table}
   section

2. The real table is generated by arch/common/gen_isr_tables.py (creating
   the build/zephyr/isr_tables.c file)

3. The real table is un-orphaned by moving it in a proper section with a
   proper alignment

While all the steps are done automatically for the software ISR table,
for the IRQ vector table each architectures must take care of modiying
its own linker script to place somewhere the generated IRQ vector table
(basically step 3 is missing).

This is currently only done for 2 architectures: Cortex-M (ARMv7) and
ARC. But when another architecture tries to use the IRQ vector table,
the linker complains about that. For example:

  Linking C executable zephyr/zephyr.elf
  riscv64-zephyr-elf/bin/ld.bfd: warning: orphan section
    `.gnu.linkonce.irq_vector_table' from
    `zephyr/CMakeFiles/zephyr_final.dir/isr_tables.c.obj' being placed in
    section `.gnu.linkonce.irq_vector_table'

In this patch we introduce a new CONFIG_ARCH_IRQ_VECTOR_TABLE_ALIGN to
support the architectures requiring a special alignment for the IRQ
vector table and we also introduce a way to automatically place the IRQ
vector table in place in the same way it is done for the ISR software
table.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
2022-06-28 12:29:42 +02:00
.github gh: issue templates: Maintainershp section in ext-source 2022-06-28 11:08:56 +02:00
arch irq: Fix IRQ vector table relocation 2022-06-28 12:29:42 +02:00
boards npcx: Set hex_file automatically w/ npcx hex image 2022-06-28 11:09:35 +02:00
cmake npcx: Set hex_file automatically w/ npcx hex image 2022-06-28 11:09:35 +02:00
doc doc: net: Add HTTP client library page 2022-06-27 16:29:16 +02:00
drivers wifi: eswifi: Convert to DEVICE_DT_GET 2022-06-28 11:09:03 +02:00
dts dts: arm: st: h7: add ITCM memory for STM32H7A3 2022-06-28 11:08:16 +02:00
include/zephyr irq: Fix IRQ vector table relocation 2022-06-28 12:29:42 +02:00
kernel debug: coredump: add xtensa intel adsp, support toolchains 2022-06-23 15:44:45 -04:00
lib lib/os: Replace cbvprintf and printfcb family when using picolibc 2022-06-27 12:47:25 +02:00
misc misc: generated: update configs.c template with <zephyr/...> prefix 2022-05-09 12:45:29 -04:00
modules modules: lvgl: fix a minor issue 2022-06-27 12:45:29 +02:00
samples samples: ti_hdc: Convert sample to use DEVICE_DT_GET_ONE 2022-06-28 11:07:50 +02:00
scripts scripts: requirements: extras: add clang-format 2022-06-28 11:09:14 +02:00
share cmake: support QUIET argument for find_package 2022-06-14 22:28:18 +02:00
soc npcx: Set hex_file automatically w/ npcx hex image 2022-06-28 11:09:35 +02:00
submanifests west.yml: allow users to easily add more modules 2021-10-07 13:45:42 +02:00
subsys Bluetooth: controller: llcp: fix issue re. version exchange 2022-06-28 11:07:43 +02:00
tests include: stm32: clock_control: Ease usage of STM32_DT_CLOCKS macro 2022-06-28 11:07:29 +02:00
.checkpatch.conf checkpatch: Ignore IS_ENABLED_CONFIG warnings 2021-10-18 08:28:01 -04:00
.clang-format clang-format: restore column limit value of 100 2022-06-27 17:18:04 -04:00
.codecov.yml
.editorconfig editorconfig: Improve verbosity 2022-04-28 08:55:39 -04:00
.gitattributes gitattributes: consider SVG files generated 2021-10-14 12:42:44 -04:00
.gitignore gitignore: Ignore emacs temporary edit files 2022-05-20 18:21:18 +02:00
.gitlint gitlint: Stop ignoring merge, revert, fixup and squash commits 2022-01-10 08:13:36 -05:00
.mailmap mailmap: update mailmap file with some stray emails 2021-06-17 14:15:41 -04:00
CMakeLists.txt lib/libc: Add picolibc support (aarch32, aarch64 and RISC-V) [v21] 2022-06-22 13:15:55 +02:00
CODE_OF_CONDUCT.md coc: move to markdown format 2019-01-24 15:37:15 -05:00
CODEOWNERS MAINTAINERS: replace yurvyn by andy-liu-telink 2022-06-27 18:19:48 +02:00
CONTRIBUTING.rst doc: Fixed a link in CONTRIBUTING.rst 2019-02-28 12:46:04 -08:00
Kconfig kconfig: Clean up header comments and make them consistent 2019-11-04 17:31:27 -05:00
Kconfig.zephyr build: make Zephyr stdint convention enforcing configurable 2022-06-22 12:26:46 +02:00
LICENSE
MAINTAINERS.yml MAINTAINERS: replace yurvyn by andy-liu-telink 2022-06-27 18:19:48 +02:00
README.rst readme: Update stale documentation links 2022-06-06 12:07:12 +02:00
VERSION version: Fix the EXTRAVERSION field 2022-06-05 20:11:17 +02:00
version.h.in cmake: version.h generation performed at build time 2022-02-08 07:50:24 -05:00
west.yml manifest: openthread upmerge to commit: 5cfbcfc 2022-06-23 15:52:34 -05:00
zephyr-env.cmd scripts: remove west from scripts/ 2019-01-29 10:15:01 +01:00
zephyr-env.sh everywhere: fix typos 2022-03-18 13:24:08 -04:00

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <img src="doc/_static/images/logo-readme.svg">
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
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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:

* **Help**: `Asking for Help Tips`_
* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
  searchable index
* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
* **Samples and example code**: see `Sample and Demo Code Examples`_
* **Mailing Lists**: users@lists.zephyrproject.org and
  devel@lists.zephyrproject.org are the main user and developer mailing lists,
  respectively. You can join the developer's list and search its archives at
  `Zephyr Development mailing list`_. The other `Zephyr mailing list
  subgroups`_ have their own archives and sign-up pages.
* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
  The builds@lists.zephyrproject.org mailing list archives the CI nightly build results.
* **Chat**: Real-time chat happens in Zephyr's Discord Server. Use
  this `Discord Invite`_ to register.
* **Contributing**: see the `Contribution Guide`_
* **Wiki**: `Zephyr GitHub wiki`_
* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
  security issues; also see our `Security`_ documentation. Security issues are
  tracked separately at https://zephyrprojectsec.atlassian.net.
* **Zephyr Project Website**: https://zephyrproject.org

.. _Discord Invite: https://chat.zephyrproject.org
.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
.. _Security: http://docs.zephyrproject.org/latest/security/index.html
.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help