Starting to add interrupt handling

src/interrupts.rs

@@ -0,0 +1,17 @@
+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/main.rs

@@ -1,4 +1,4 @@
-// #![feature(abi_x86_interrupt, asm)]
+#![feature(abi_x86_interrupt)]
 #![no_std]
 #![no_main]
 #![feature(custom_test_frameworks)]
@@ -9,6 +9,7 @@
 mod vga_buffer;
 #[macro_use]
 mod serial;
+mod interrupts;
 mod test_utils;
 
 #[cfg(not(test))]
@@ -24,6 +25,12 @@ pub extern "C" fn _start() -> ! {
     test_main();
 
     println!("Gamarjoba, munde!");
+    init();
+
+    // Deliberate breakpoint exception
+    x86_64::instructions::interrupts::int3();
+
+    println!("We're here now");
     loop {}
 }
 
@@ -36,3 +43,7 @@ fn basic_test() {
 fn basic_test2() {
     assert_eq!(4, 4);
 }
+
+pub fn init() {
+    interrupts::init_idt();
+}