[sw] Cleanup Device Image Linker Scripts

This change is intended to cleanup how we use our linker scripts and our
linker flags so that we end up with a more controlled set of device ELF
files.

The main way this is done is by extracting out all the informational
sections into a separate linker script fragment, that the other scripts
include.

This change also:
- Disables emitting unwind information.
- Adds some linker arguments to emit warnings if problematic sections
  are emitted (COMMON, and orphan sections).
- Defines entry points for all linker scripts (not that we ever use this
  information, but the ELF format requires it).
- Extracts some common device link arguments that are duplicated in the
  device tree.
- Lays some groundwork for investigating how we can use LLD for
  OpenTitan Device Builds.

Signed-off-by: Sam Elliott <selliott@lowrisc.org>
9 files changed
tree: e4d135e973d4a087ab8a73747d4c0cfc0ffe7e65
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. site/
  6. sw/
  7. test/
  8. util/
  9. .clang-format
  10. .dockerignore
  11. .flake8
  12. .gitignore
  13. .style.yapf
  14. .svlint.toml
  15. .svls.toml
  16. _index.md
  17. apt-requirements.txt
  18. azure-pipelines.yml
  19. check_tool_requirements.core
  20. CLA
  21. COMMITTERS
  22. CONTRIBUTING.md
  23. LICENSE
  24. meson.build
  25. meson_init.sh
  26. meson_options.txt
  27. python-requirements.txt
  28. README.md
  29. tool_requirements.py
  30. toolchain.txt
README.md

OpenTitan

OpenTitan logo

About the project

OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.

About this repository

This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.

Documentation

The project contains comprehensive documentation of all IPs and tools. You can access it online at docs.opentitan.org.

How to contribute

Have a look at CONTRIBUTING for guidelines on how to contribute code to this repository.

Licensing

Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).