diff --git a/src/runtime/src/kernel/core1.rs b/src/runtime/src/kernel/core1.rs
index 7836784..661a603 100644
--- a/src/runtime/src/kernel/core1.rs
+++ b/src/runtime/src/kernel/core1.rs
@@ -5,7 +5,6 @@ use alloc::borrow::ToOwned;
 use log::{debug, info, error};
 use cslice::CSlice;
 
-use libregister::RegisterR;
 use libcortex_a9::{
     enable_fpu,
     cache::{dcci_slice, iciallu, bpiall},
@@ -220,7 +219,7 @@ extern fn dl_unwind_find_exidx(pc: *const u32, len_ptr: *mut u32) -> *const u32
     let length;
     let start: *const EXIDX_Entry;
     unsafe {
-        if (&__text_start as *const u32 <= pc && pc < &__text_end as *const u32) {
+        if &__text_start as *const u32 <= pc && pc < &__text_end as *const u32 {
             length = (&__exidx_end as *const EXIDX_Entry).offset_from(&__exidx_start) as u32;
             start = &__exidx_start;
         } else if KERNEL_IMAGE != ptr::null() {
@@ -230,8 +229,8 @@ extern fn dl_unwind_find_exidx(pc: *const u32, len_ptr: *mut u32) -> *const u32
             length = exidx.len() as u32;
             start = exidx.as_ptr();
         } else {
-            *len_ptr = 0;
-            return 0 as *const u32;
+            length = 0;
+            start = ptr::null();
         }
         *len_ptr = length;
     }