[PATCH v4 0/2] Rust and the shadow call stack sanitizer

[Alice Ryhl <aliceryhl@google.com>]

This patch series makes it possible to use Rust together with the shadow
call stack sanitizer. The first patch is intended to be backported to
ensure that people don't try to use SCS with Rust on older kernel
versions. The second patch makes it possible to use Rust with the shadow
call stack sanitizer.

The second patch in this series depends on the next version of [1],
which Miguel will send soon.

Link: https://lore.kernel.org/rust-for-linux/20240709160615.998336-12-ojeda@kernel.org/ [1]
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
---
Changes in v4:
- Move `depends on` to CONFIG_RUST.
- Rewrite commit messages to include more context.
- Link to v3: https://lore.kernel.org/r/20240704-shadow-call-stack-v3-0-d11c7a6ebe30@google.com

Changes in v3:
- Use -Zfixed-x18.
- Add logic to reject unsupported rustc versions.
- Also include a fix to be backported.
- Link to v2: https://lore.kernel.org/rust-for-linux/20240305-shadow-call-stack-v2-1-c7b4a3f4d616@google.com/

Changes in v2:
- Add -Cforce-unwind-tables flag.
- Link to v1: https://lore.kernel.org/rust-for-linux/20240304-shadow-call-stack-v1-1-f055eaf40a2c@google.com/

---
Alice Ryhl (2):
      rust: SHADOW_CALL_STACK is incompatible with Rust
      rust: support for shadow call stack sanitizer

 Makefile            | 1 +
 arch/arm64/Makefile | 3 +++
 init/Kconfig        | 1 +
 3 files changed, 5 insertions(+)
---
base-commit: 9cde54ad2f7ac3cf84f65df605570c5a00afc82f
change-id: 20240304-shadow-call-stack-9c197a4361d9

Best regards,
-- 
Alice Ryhl <aliceryhl@google.com>