diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86_64/interrupt/mod.rs | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/arch/x86_64/interrupt/mod.rs b/src/arch/x86_64/interrupt/mod.rs index ef050b0..410996a 100644 --- a/src/arch/x86_64/interrupt/mod.rs +++ b/src/arch/x86_64/interrupt/mod.rs @@ -5,9 +5,14 @@ use core::arch::asm; #[no_mangle] #[cfg(target_arch = "x86_64")] -extern "C" fn guardian(slot: u16) { +extern "C" fn interrupt_gate(slot: u16) { interrupt_disable(); - println!("interrupt received {:x}", slot); + // NOTE: the interrupt handler should NEVER block on a lock; in this case + // the CGA screen is protected by a spinlock. The lock holder will never be + // able to release the lock if the interrupt handler blocks on it. Try + // spamming the keyboard with the following line of code uncommented: it + // will deadlock! + // println!("interrupt received {:x}", slot); interrupt_enable(); } |