diff options
Diffstat (limited to 'asm')
| -rw-r--r-- | asm/inline.rs | 7 | ||||
| -rw-r--r-- | asm/lib.rs | 5 |
2 files changed, 10 insertions, 2 deletions
diff --git a/asm/inline.rs b/asm/inline.rs index 9a0c66e..688604e 100644 --- a/asm/inline.rs +++ b/asm/inline.rs @@ -175,6 +175,13 @@ pub unsafe fn __wfi() { asm!("wfi"); } +/// Semihosting syscall. +#[inline(always)] +pub unsafe fn __syscall(mut nr: u32, arg: u32) -> u32 { + asm!("bkpt #0xab", inout("r0") nr, in("r1") arg); + nr +} + // v7m *AND* v8m.main, but *NOT* v8m.base #[cfg(any(armv7m, armv8m_main))] pub use self::v7m::*; @@ -46,7 +46,7 @@ macro_rules! shims { pub unsafe extern "C" fn $name( $($arg: $argty),* ) $(-> $ret)? { - crate::inline::$name($($arg)*) + crate::inline::$name($($arg),*) } )+ }; @@ -72,9 +72,10 @@ shims! { fn __udf(); fn __wfe(); fn __wfi(); + fn __syscall(nr: u32, arg: u32) -> u32; } -// v7m *AND* v8m.main, but *NOT* v8m.base +// v7m *AND* v8m.main, but *NOT* v8m.base #[cfg(any(armv7m, armv8m_main))] shims! { fn __basepri_max(val: u8); |