Set arm64 exception handler before entering the rust world

src/arch/aarch64/interrupt/mod.rs

@@ -47,17 +47,3 @@ pub unsafe fn halt() {
         asm!("wfi");
     }
 }
-
-#[inline(always)]
-pub unsafe fn init() {
-    unsafe {
-        // Setup interrupt handlers
-        asm!(
-            "
-        ldr {tmp}, =exception_vector_base
-        msr vbar_el1, {tmp}
-        ",
-            tmp = out(reg) _,
-        );
-    }
-}

src/arch/aarch64/start.rs

@@ -45,6 +45,10 @@ global_asm!("
         mov x2, {stack_size}-16
         add sp, x1, x2
 
+        // Setup interrupt handlers
+        ldr x9, =exception_vector_base
+        msr vbar_el1, x9
+
         mov lr, 0
         b {start}
 
@@ -93,8 +97,6 @@ unsafe extern "C" fn start(args_ptr: *const KernelArgs) -> ! {
             info!("Redox OS starting...");
             args.print();
 
-            interrupt::init();
-
             // Initialize RMM
             crate::startup::memory::init(&args, None, None);