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Guillaume Gomez cf4fbc0695
Rollup merge of #141622 - folkertdev:powerpc-va_arg, r=workingjubilee 
implement `va_arg` for `powerpc`

tracking issue: https://github.com/rust-lang/rust/issues/44930

The llvm `va_arg` implementation is well-known to have serious limitations. Some planned changes to rust's `VaList` make it much more likely that LLVM miscompiles `va_arg`, so this PR adds support for the various powerpc targets. Now at least the targets that `core` has explicit support for will continue to work.

For `powerpc` (the 32-bit variant) this implementation also fixes a bug where only up to 20 variadic arguments were supported.

Locally (with qemu), these targets now pass the tests in https://github.com/rust-lang/rust/blob/master/tests/run-make/c-link-to-rust-va-list-fn/checkrust.rs. That test does not actually run for the powerpc targets in CI though.

The implementation is based on clang:

- handling of big endian architectures 3c8089d1ea/clang/lib/CodeGen/ABIInfoImpl.cpp (L191-L193)
- 64-bit 3c8089d1ea/clang/lib/CodeGen/Targets/PPC.cpp (L969)
- 32-bit 3c8089d1ea/clang/lib/CodeGen/Targets/PPC.cpp (L430)

cc `@daltenty` (target maintainer)
r? `@workingjubilee`
`@rustbot` label: +F-c_variadic
2025-06-01 19:35:42 +02:00
.github ci: use arm to calculate job matrix 2025-05-30 15:11:30 +02:00
compiler Rollup merge of #141622 - folkertdev:powerpc-va_arg, r=workingjubilee 2025-06-01 19:35:42 +02:00
library Rollup merge of #141224 - RalfJung:no-objects, r=traviscross 2025-06-01 19:35:42 +02:00
LICENSES Synchronize Unicode license text from unicode.org 2024-11-20 00:54:12 -08:00
src Rollup merge of #141521 - ruancomelli:const-float-rounding, r=RalfJung 2025-06-01 00:35:53 +02:00
tests Rollup merge of #141224 - RalfJung:no-objects, r=traviscross 2025-06-01 19:35:42 +02:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig Don't apply editorconfig to llvm 2025-02-09 16:21:14 -05:00
.git-blame-ignore-revs git: ignore 60600a6fa4 for blame purposes 2025-04-17 11:50:24 +08:00
.gitattributes Mark .pp files as Rust 2025-03-29 12:39:06 +01:00
.gitignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.gitmodules Lowercase git url for rust-lang/enzyme.git 2025-05-15 21:37:49 +00:00
.ignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.mailmap Add myself to mailmap 2025-04-14 14:27:15 +01:00
bootstrap.example.toml add rust.debug-assertions-tools option 2025-04-29 11:05:06 +02:00
Cargo.lock Rollup merge of #141004 - matthewjasper:unicode-before-expansion, r=davidtwco 2025-05-30 07:01:28 +02:00
Cargo.toml Alphabetize the root workspace members 2025-03-13 12:21:14 -07:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md Improve CONTRIBUTING.md grammar and clarity 2025-05-23 23:03:06 +02:00
COPYRIGHT dist: Re-work how we describe the licence of Rust in our distributions 2024-12-09 10:18:55 +00:00
INSTALL.md mention about x.py setup in INSTALL.md 2025-04-24 09:15:53 +03:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
license-metadata.json Update license metadata 2025-02-15 16:48:37 +01:00
LICENSE-MIT dist: Re-work how we describe the licence of Rust in our distributions 2024-12-09 10:18:55 +00:00
README.md Update Rust Foundation links in Readme 2025-03-16 19:03:40 -07:00
RELEASES.md Rollup merge of #140879 - pthariensflame:patch-1, r=pietroalbini 2025-05-10 16:26:04 +02:00
REUSE.toml change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
rust-bors.toml Increase timeout for new bors try builds 2025-05-30 15:59:14 +02:00
rustfmt.toml Initial support for dynamically linked crates 2025-05-04 22:03:15 +03:00
triagebot.toml Rollup merge of #141384 - Kobzol:enable-review-prefs, r=jieyouxu 2025-05-29 17:02:58 +02:00
x Look for python3 first on MacOS, not py 2025-02-13 10:24:54 -05:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Reformat Python code with ruff 2024-12-04 23:03:44 +01:00

README.md

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Why Rust?

  • Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.

  • Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.

  • Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).

Quick Start

Read "Installation" from The Book.

Installing from Source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the Rust language trademark policy.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.