diff --git a/src/runtime/src/kernel/core1.rs b/src/runtime/src/kernel/core1.rs
index 7094205..074eb68 100644
--- a/src/runtime/src/kernel/core1.rs
+++ b/src/runtime/src/kernel/core1.rs
@@ -5,11 +5,13 @@ 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},
     asm::{dsb, isb},
     sync_channel,
+    regs::MPIDR
 };
 use libboard_zynq::{mpcore, gic};
 use libsupport_zynq::ram;
@@ -219,7 +221,9 @@ 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 {
+        let id = MPIDR.read().cpu_id() as usize;
+        // try to look up kernel for core 1 only
+        if (&__text_start as *const u32 <= pc && pc < &__text_end as *const u32) || id == 0 {
             length = (&__exidx_end as *const EXIDX_Entry).offset_from(&__exidx_start) as u32;
             start = &__exidx_start;
         } else {