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Hardware Interrupts: Don't replace panic in double fault handler (#690)

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Philipp Oppermann
2019-11-22 16:13:01 +01:00
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parent 537a070238
commit 555b5aece1
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blog/content/second-edition/posts/07-hardware-interrupts/index.md
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@@ -502,22 +502,6 @@ pub fn test_panic_handler(info: &PanicInfo) -> ! {
}
```
We can also use `hlt_loop` in our double fault exception handler:
```rust
// in src/interrupts.rs
use crate::hlt_loop; // new
extern "x86-interrupt" fn double_fault_handler(
stack_frame: &mut InterruptStackFrame,
_error_code: u64,
) {
println!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
hlt_loop(); // new
}
```
When we run our kernel now in QEMU, we see a much lower CPU usage.
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