From d061368f18945e1d086455e3c0d0f6e4826ca18a Mon Sep 17 00:00:00 2001
From: Timothy Warren <twarren@nabancard.com>
Date: Tue, 24 Sep 2019 16:24:38 -0400
Subject: [PATCH] post-05

---
 src/interrupts.rs | 33 +++++++++++++++++++++++++++++++++
 src/lib.rs        |  7 +++++++
 src/main.rs       |  4 ++++
 3 files changed, 44 insertions(+)
 create mode 100644 src/interrupts.rs

diff --git a/src/interrupts.rs b/src/interrupts.rs
new file mode 100644
index 0000000..7fa4d5e
--- /dev/null
+++ b/src/interrupts.rs
@@ -0,0 +1,33 @@
+use lazy_static::lazy_static;
+use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
+
+use crate::println;
+
+#[cfg(test)]
+use crate::{serial_print, serial_println};
+
+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: &mut InterruptStackFrame
+) {
+    println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
+}
+
+#[test_case]
+fn test_breakpoint_exception() {
+    serial_print!("test_breakpoint_exception...");
+    // invoke a breakpoint exception
+    x86_64::instructions::interrupts::int3();
+    serial_println!("[ok]");
+}
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index fe8dde5..395f595 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,13 @@
 #![no_std]
 #![cfg_attr(test, no_main)]
 #![feature(custom_test_frameworks)]
+#![feature(abi_x86_interrupt)]
 #![test_runner(crate::test_runner)]
 #![reexport_test_harness_main = "test_main"]
 
 use core::panic::PanicInfo;
 
+pub mod interrupts;
 pub mod serial;
 pub mod macros;
 pub mod vga_buffer;
@@ -29,6 +31,7 @@ pub fn test_panic_handler(info: &PanicInfo) -> ! {
 #[cfg(test)]
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
+    init();
     test_main();
     loop {}
 }
@@ -53,4 +56,8 @@ pub fn exit_qemu(exit_code: QemuExitCode) {
         let mut port = Port::new(0xf4);
         port.write(exit_code as u32);
     }
+}
+
+pub fn init() {
+    interrupts::init_idt();
 }
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 7df5839..1e32c3f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -26,6 +26,10 @@ fn panic(info: &PanicInfo) -> ! {
 pub extern "C" fn _start() -> ! {
     println!("Hello World{}", "!");
 
+    blog_os::init();
+
+    x86_64::instructions::interrupts::int3();
+
     #[cfg(test)]
     test_main();