#[naked]
This crate provide a proc macro version of the #[naked]
attribute which can
be used on stable Rust.
// The SYSV64 calling convention used on x86_64 Linux passes the first
// 2 integer arguments in EDI/ESI.
#[naked_function::naked]
pub unsafe extern "C" fn add(a: i32, b: i32) -> i32 {
asm!(
"lea eax, [edi + esi]",
"ret",
);
}
#[test]
fn main() {
let ret = unsafe { add(1, 2) };
assert_eq!(ret, 3);
}
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Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.