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add a bootstrap variant of naked_asm

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Folkert de Vries 2024-09-13 14:56:29 +02:00
parent 76ed7a1fa4
commit 20c0067528
1 changed files with 34 additions and 0 deletions
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34
library/core/src/arch.rs
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@ -3,6 +3,9 @@
#[allow(unused_imports)]
#[stable(feature = "simd_arch", since = "1.27.0")]
pub use crate::core_arch::arch::*;
#[unstable(feature = "naked_functions", issue = "90957")]
#[cfg(bootstrap)]
pub use crate::naked_asm;
/// Inline assembly.
///
@ -17,6 +20,37 @@ pub macro asm("assembly template", $(operands,)* $(options($(option),*))?) {
/* compiler built-in */
}
/// Inline assembly used in combination with `#[naked]` functions.
///
/// Refer to [Rust By Example] for a usage guide and the [reference] for
/// detailed information about the syntax and available options.
///
/// [Rust By Example]: https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html
/// [reference]: https://doc.rust-lang.org/nightly/reference/inline-assembly.html
#[unstable(feature = "naked_functions", issue = "90957")]
#[macro_export]
#[cfg(bootstrap)]
macro_rules! naked_asm {
([$last:expr], [$($pushed:expr),*]) => {
#[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
{
core::arch::asm!($($pushed),*, options(att_syntax, noreturn))
}
#[cfg(not(any(target_arch = "x86_64", target_arch = "x86")))]
{
core::arch::asm!($($pushed),* , $last, options(noreturn))
}
};
([$first:expr $(, $rest:expr)*], [$($pushed:expr),*]) => {
naked_asm!([$($rest),*], [$($pushed,)* $first]);
};
($($expr:expr),* $(,)?) => {
naked_asm!([$($expr),*], []);
};
}
/// Inline assembly used in combination with `#[naked]` functions.
///
/// Refer to [Rust By Example] for a usage guide and the [reference] for