1b3b8e7b02
add `naked_asm!` macro for use in `#[naked]` functions tracking issue: https://github.com/rust-lang/rust/issues/90957 Adds the `core::arch::naked_asm` macro, to be used in `#[naked]` functions, but providing better error messages and a place to explain the restrictions on assembly in naked functions. This PR does not yet require that the `naked_asm!` macro is used inside of `#[naked]` functions: - the `asm!` macro can still be used in `#[naked]` functions currently, with the same restrictions and error messages as before. - the `naked_asm!` macro can be used outside of `#[naked]` functions. It has not yet been decided whether that should be allowed long-term. In this PR, the parsing code of `naked_asm!` now enforces the restrictions on assembly in naked functions, with the exception of checking that the `noreturn` option is specified. It also has not currently been decided if `noreturn` should be implicit or not. This PR looks large because it touches a bunch of tests. The code changes are mostly straightforward I think: we now have 3 flavors of assembly macro, and that information must be propagated through the parsing code and error messages. cc `@Lokathor` r? `@Amanieu` |
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