From b4914c26fead991fb3c13833f549e0b328b8e745 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Tue, 1 Nov 2022 11:11:20 +0100
Subject: [PATCH] Kernel: Prevent deadlocks when panicking

---
 moon/src/panic.rs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/moon/src/panic.rs b/moon/src/panic.rs
index 91cafe83..670af050 100644
--- a/moon/src/panic.rs
+++ b/moon/src/panic.rs
@@ -1,9 +1,12 @@
 use core::panic::PanicInfo;
 
-use crate::println;
+use crate::try_println;
+use crate::arch::io::SERIAL;
+use crate::arch::cpu;
 
 #[panic_handler]
 fn panic(info: &PanicInfo) -> ! {
-    println!("Kernel {}", info);
-    loop {}
+    unsafe { SERIAL.force_unlock(); } // since we're panicking, this is not relevant anymore.
+    try_println!("Kernel {}", info); // we probably should succeed, unless another CPU locked the serial port just after we unlocked it but before try_println attempts to lock it.
+    cpu::halt();
 }
\ No newline at end of file