Add the naked attribute of intrinsics

rp-rs · Dec 17, 2023 · a215988 · a215988
1 parent 99a0ebd
commit a215988
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diff --git a/rp2040-hal/src/intrinsics.rs b/rp2040-hal/src/intrinsics.rs
@@ -238,6 +238,29 @@ macro_rules! intrinsics {
         intrinsics!($($rest)*);
     };
 
+    // Naked functions are special: we can't generate wrappers for them since
+    // they use a custom calling convention.
+    (
+        #[naked]
+        $(#[$($attr:tt)*])*
+        unsafe extern $abi:tt fn $name:ident( $($argname:ident:  $ty:ty),* ) $(-> $ret:ty)? {
+            $($body:tt)*
+        }
+
+        $($rest:tt)*
+    ) => (
+        mod $name {
+            #[naked]
+            $(#[$($attr)*])*
+            #[no_mangle]
+            pub unsafe extern $abi fn $name( $($argname: $ty),* ) $(-> $ret)? {
+                $($body)*
+            }
+        }
+
+        intrinsics!($($rest)*);
+    );
+
     (
         $(#[$($attr:tt)*])*
         unsafe extern $abi:tt fn $name:ident( $($argname:ident: $ty:ty),* ) $(-> $ret:ty)? {

diff --git a/rp2040-hal/src/lib.rs b/rp2040-hal/src/lib.rs
@@ -37,6 +37,7 @@
 
 #![warn(missing_docs)]
 #![no_std]
+#![feature(naked_functions)]
 
 #[doc(hidden)]
 pub use paste;