From dcf82e0b329a79beba3e961ff1033ed030d60604 Mon Sep 17 00:00:00 2001
From: pjht <pterpstra@pterpstra.com>
Date: Tue, 6 Aug 2024 18:34:34 -0500
Subject: [PATCH] Gracefully fail if QEMU does not exit

---
 src/qemu_exit.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/qemu_exit.rs b/src/qemu_exit.rs
index 5ff08be..d804f70 100644
--- a/src/qemu_exit.rs
+++ b/src/qemu_exit.rs
@@ -1,6 +1,6 @@
 use x86_64::instructions::port::Port;
 
-use crate::{kernel_heap::HEAP, physical_memory::PHYSICAL_MEMORY};
+use crate::{kernel_heap::HEAP, physical_memory::PHYSICAL_MEMORY, println};
 
 pub fn exit_qemu() -> ! {
     PHYSICAL_MEMORY.lock().print_stats();
@@ -8,5 +8,9 @@ pub fn exit_qemu() -> ! {
     unsafe {
         Port::new(0xf4).write(0u32);
     }
-    unreachable!();
+    println!("Failed to quit QEMU! Disabling interupts and halting CPU!");
+    x86_64::instructions::interrupts::disable();
+    loop {
+        x86_64::instructions::hlt();
+    }
 }