diff options
Diffstat (limited to 'cortex-m-rt/src/lib.rs')
| -rw-r--r-- | cortex-m-rt/src/lib.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/cortex-m-rt/src/lib.rs b/cortex-m-rt/src/lib.rs index 128d7b4..23cb1d4 100644 --- a/cortex-m-rt/src/lib.rs +++ b/cortex-m-rt/src/lib.rs @@ -211,6 +211,7 @@ pub static __EXCEPTIONS: [Option<unsafe extern "C" fn()>; 14] = [ #[macro_export] macro_rules! exception { (DefaultHandler, $path:path) => { + #[allow(unsafe_code)] #[allow(non_snake_case)] #[export_name = "DefaultHandler"] pub unsafe extern "C" fn __impl_DefaultHandler() { @@ -226,6 +227,7 @@ macro_rules! exception { }; (HardFault, $path:path) => { + #[allow(unsafe_code)] #[allow(non_snake_case)] #[export_name = "UserHardFault"] pub unsafe extern "C" fn __impl_UserHardFault(ef: &$crate::ExceptionFrame) { @@ -238,7 +240,24 @@ macro_rules! exception { // NOTE Unfortunately, this will end up leaking `$exception` into the function call namespace. // But the damage is somewhat reduced by having `$exception` not being a `snake_case` function. + ($ExceptionName:ident, $path:path, state: $State:ty = $init:expr) => { + #[allow(unsafe_code)] + #[no_mangle] + pub unsafe extern "C" fn $ExceptionName() { + static mut STATE: $State = $init; + + // check that this exception exists + let _ = $crate::Exception::$ExceptionName; + + // validate the signature of the user provided handler + let f: fn(&mut $State) = $path; + + f(&mut STATE) + } + }; + ($ExceptionName:ident, $path:path) => { + #[allow(unsafe_code)] #[no_mangle] pub unsafe extern "C" fn $ExceptionName() { // check that this exception exists |