first interrupt handler + setup IDT

kernel/src/arch/x86_64/interrupts.rs

@@ -0,0 +1,22 @@
+use lib_ascii::println_log;
+use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
+
+use spin::Lazy;
+
+static IDT: Lazy<InterruptDescriptorTable> = Lazy::new(|| {
+    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_log!("Exception: Breakpoint\n{:#?}", stack_frame);
+}
+