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43 lines
1.1 KiB
Rust
43 lines
1.1 KiB
Rust
//! The module handelling kernel panic.
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use core::panic::PanicInfo;
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use crate::println;
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use crate::wait_forever;
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/// Avoid nested panic
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fn panic_prevent_reenter() {
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use core::sync::atomic::{AtomicBool, Ordering};
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// This code is safe to use with AArch64, if using another
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// arch, check the safety first
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#[cfg(not(target_arch = "aarch64"))]
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compile_error!(
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"The following code is safe for aarch64, \
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check the safety before using with another arch"
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);
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static PANIC_IN_PROGRESS: AtomicBool = AtomicBool::new(false);
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if !PANIC_IN_PROGRESS.load(Ordering::Relaxed) {
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PANIC_IN_PROGRESS.store(true, Ordering::Relaxed);
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return;
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}
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wait_forever()
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}
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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panic_prevent_reenter();
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let (location, line, column) = match info.location() {
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Some(loc) => (loc.file(), loc.line(), loc.column()),
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_ => ("???", 0, 0),
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};
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println!(
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"Kernel panic!\n\n\
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Panic location:\n File: '{location}', line {line}, column {column}\n\n\
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{}",
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info.message().unwrap_or(&format_args!(""))
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);
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wait_forever()
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}
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