Interrupt handler for INT3

src/interrupts.rs

@@ -0,0 +1,20 @@
+use crate::println;
+
+use lazy_static::lazy_static;
+use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
+
+lazy_static! {
+    static ref IDT: InterruptDescriptorTable = {
+        let mut idt = InterruptDescriptorTable::new();
+        idt.breakpoint.set_handler_fn(breakpoint_handler);
+        idt
+    };
+}
+
+pub fn init_idt() {
+    IDT.load();
+}
+
+extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame){
+    println!("EXCEPTION: BREAKPOINT\n{stack_frame:#?}");
+}

src/lib.rs

@@ -3,9 +3,11 @@
 #![feature(custom_test_frameworks)]
 #![test_runner(crate::test_runner)]
 #![reexport_test_harness_main = "test_main"]
+#![feature(abi_x86_interrupt)]
 
 pub mod serial;
 pub mod vga_buffer;
+pub mod interrupts;
 
 use core::panic::PanicInfo;
 
@@ -39,14 +41,17 @@ pub fn test_panic_handler(info: &PanicInfo) -> ! {
     loop {}
 }
 
-/// Entry point for `cargo test`
 #[cfg(test)]
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
     test_main();
     loop {}
 }
 
+pub fn init() {
+    interrupts::init_idt();
+}
+
 #[cfg(test)]
 #[panic_handler]
 fn panic(info: &PanicInfo) -> ! {

src/main.rs

@@ -14,9 +14,16 @@ pub trait Testable {
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
     println!("Hello, Welcome to the ORUST Operating System{}", "!");
+
+    orust_os::init();
+
+    x86_64::instructions::interrupts::int3();
+
     #[cfg(test)]
     test_main();
 
+    println!("It did not crash!");
+
     #[allow(clippy::empty_loop)]
     loop {}
 }