Re: [PATCH v4 1/4] compiler_types: Introduce the Clang __preserve_most function attribute

[Kees Cook]

On Fri, 11 Aug 2023 17:18:38 +0200, Marco Elver wrote:
> [1]: "On X86-64 and AArch64 targets, this attribute changes the calling
> convention of a function. The preserve_most calling convention attempts
> to make the code in the caller as unintrusive as possible. This
> convention behaves identically to the C calling convention on how
> arguments and return values are passed, but it uses a different set of
> caller/callee-saved registers. This alleviates the burden of saving and
> recovering a large register set before and after the call in the caller.
> If the arguments are passed in callee-saved registers, then they will be
> preserved by the callee across the call. This doesn't apply for values
> returned in callee-saved registers.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/4] compiler_types: Introduce the Clang __preserve_most function attribute
      https://git.kernel.org/kees/c/7a0fd5e16785
[2/4] list_debug: Introduce inline wrappers for debug checks
      https://git.kernel.org/kees/c/b16c42c8fde8
[3/4] list: Introduce CONFIG_LIST_HARDENED
      https://git.kernel.org/kees/c/aebc7b0d8d91
[4/4] hardening: Move BUG_ON_DATA_CORRUPTION to hardening options
      https://git.kernel.org/kees/c/aa9f10d57056

Take care,

-- 
Kees Cook