From ed8c588f0a6ffa62d35c735daac517902da8788a Mon Sep 17 00:00:00 2001
From: Dennis Kobert <dennis@kobert.dev>
Date: Sun, 17 Nov 2019 20:11:02 +0100
Subject: Add interrupt handlers

---
 kernel/src/interrupts/exception_handlers.rs | 10 ++++++++++
 kernel/src/interrupts/idt.rs                | 12 ++++++++++++
 kernel/src/interrupts/mod.rs                | 23 +++++++++++++++++++----
 3 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/kernel/src/interrupts/exception_handlers.rs b/kernel/src/interrupts/exception_handlers.rs
index cd223bb..ef67eff 100644
--- a/kernel/src/interrupts/exception_handlers.rs
+++ b/kernel/src/interrupts/exception_handlers.rs
@@ -35,6 +35,16 @@ pub extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut InterruptStac
     }
 }
 
+pub extern "x86-interrupt" fn div_zero_handler(stack_frame: &mut InterruptStackFrame) {
+    match get_expected_fault() {
+        InterruptType::DivZero => qemu::exit_qemu(qemu::QemuExitCode::Success),
+        _ => panic!(
+            "Divide by zero exception thrown\n\n{}",
+            exception_default!(stack_frame)
+        ),
+    }
+}
+
 pub extern "x86-interrupt" fn general_protection_fault_handler(
     stack_frame: &mut InterruptStackFrame,
     error_code: u64,
diff --git a/kernel/src/interrupts/idt.rs b/kernel/src/interrupts/idt.rs
index 8cd01d0..3eb9724 100644
--- a/kernel/src/interrupts/idt.rs
+++ b/kernel/src/interrupts/idt.rs
@@ -5,8 +5,14 @@ use x86_64::structures::idt::InterruptDescriptorTable;
 lazy_static! {
     static ref IDT: InterruptDescriptorTable = {
         let mut idt = InterruptDescriptorTable::new();
+        for i in 32..255 {
+            idt[i].set_handler_fn(dummy_handler);
+        }
+
         idt.breakpoint
             .set_handler_fn(exception_handlers::breakpoint_handler);
+        idt.divide_by_zero
+            .set_handler_fn(exception_handlers::div_zero_handler);
         idt.segment_not_present
             .set_handler_fn(exception_handlers::segment_not_present_handler);
         idt.general_protection_fault
@@ -25,6 +31,12 @@ lazy_static! {
     };
 }
 
+pub extern "x86-interrupt" fn dummy_handler(
+    stack_frame: &mut x86_64::structures::idt::InterruptStackFrame,
+) {
+    panic!("unhandled interrupt recieved");
+}
+
 pub fn init() {
     IDT.load()
 }
diff --git a/kernel/src/interrupts/mod.rs b/kernel/src/interrupts/mod.rs
index b39eb37..27993ec 100644
--- a/kernel/src/interrupts/mod.rs
+++ b/kernel/src/interrupts/mod.rs
@@ -9,15 +9,30 @@ const INT_OFFSET: u8 = 32;
 #[repr(u8)]
 #[derive(PartialEq, Clone, Copy)]
 pub enum InterruptType {
-    None,
-    PageFault,
+    DivZero,
+    Debug,
+    NonMaskableInterrupt,
+    Breakpoint,
+    Overflow,
+    BountRange,
+    InvalidOptcode,
+    DeviceNotAvailable,
     DoubleFault,
+    CoprocessorOverrun,
+    InvalidTTS,
     NotPresent,
-    Breakpoint,
+    StackSegmentFault,
     GeneralProtectionFault,
-
+    PageFault,
+    x87Floating = 16,
+    AlignmentCheck,
+    MachineCheck,
+    SIMD,
+    Virtualization,
+    Security,
     Timer = INT_OFFSET,
     Keyboard = INT_OFFSET + 1,
+    None = 255,
 }
 
 impl InterruptType {
-- 
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