From 6e3528f5f53cae53fc8508481ed9d8744490293b Mon Sep 17 00:00:00 2001
From: ami-chuu <amichuu73@proton.me>
Date: Mon, 30 Mar 2026 14:28:26 +0300
Subject: [PATCH] Added CPU exceptions

---
 src/interrupts.rs | 25 +++++++++++++++++++++++++
 src/lib.rs        |  7 +++++++
 src/main.rs       |  5 +++++
 3 files changed, 37 insertions(+)
 create mode 100644 src/interrupts.rs

diff --git a/src/interrupts.rs b/src/interrupts.rs
new file mode 100644
index 0000000..405c1e9
--- /dev/null
+++ b/src/interrupts.rs
@@ -0,0 +1,25 @@
+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);
+}
+
+#[test_case]
+fn test_breakpoint_exception() {
+    // invoke a breakpoint exception
+    x86_64::instructions::interrupts::int3();
+}
diff --git a/src/lib.rs b/src/lib.rs
index c7387d9..ae4e3a3 100644
--- a/src/lib.rs
+++ b/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)]
 
 use core::panic::PanicInfo;
 
+pub mod interrupts;
 pub mod serial;
 pub mod vga_buffer;
 
@@ -43,6 +45,7 @@ pub fn test_panic_handler(info: &PanicInfo) -> ! {
 #[cfg(test)]
 #[unsafe(no_mangle)]
 pub extern "C" fn _start() -> ! {
+    init();
     test_main();
     loop {}
 }
@@ -68,3 +71,7 @@ pub fn exit_qemu(exit_code: QemuExitCode) {
         port.write(exit_code as u32);
     }
 }
+
+pub fn init() {
+    interrupts::init_idt();
+}
diff --git a/src/main.rs b/src/main.rs
index 22fb183..f153785 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,9 +11,14 @@ use core::panic::PanicInfo;
 pub extern "C" fn _start() -> ! {
     println!("Welcome to Amix{}", "!");
 
+    amix::init();
+
+    x86_64::instructions::interrupts::int3();
+
     #[cfg(test)]
     test_main();
 
+    println!("It did not crash!");
     loop {}
 }