From b4ff6dda24fdbfce2c7a8b6a897c3cd6be56ab76 Mon Sep 17 00:00:00 2001
From: pca006132 <jl@m-labs.hk>
Date: Mon, 18 Jan 2021 10:38:50 +0800
Subject: [PATCH] runtime: use naked function for IRQ

non-naked IRQ would somehow trigger interrupts after several kernel
restarts, investigating
---
 src/runtime/src/irq.rs  | 1 +
 src/runtime/src/main.rs | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/runtime/src/irq.rs b/src/runtime/src/irq.rs
index 030739a..84b6afe 100644
--- a/src/runtime/src/irq.rs
+++ b/src/runtime/src/irq.rs
@@ -16,6 +16,7 @@ static CORE1_RESTART: AtomicBool = AtomicBool::new(false);
 
 #[link_section = ".text.boot"]
 #[no_mangle]
+#[naked]
 pub unsafe extern "C" fn IRQ() {
     if MPIDR.read().cpu_id() == 1 {
         let mpcore = mpcore::RegisterBlock::mpcore();
diff --git a/src/runtime/src/main.rs b/src/runtime/src/main.rs
index 63711b6..f8b7c6a 100644
--- a/src/runtime/src/main.rs
+++ b/src/runtime/src/main.rs
@@ -6,6 +6,7 @@
 #![feature(c_variadic)]
 #![feature(const_btree_new)]
 #![feature(const_in_array_repeat_expressions)]
+#![feature(naked_functions)]
 
 extern crate alloc;