Don't call hooks if there is already an unhandled exception

qemu/accel/tcg/cputlb.c

@@ -1441,6 +1441,8 @@ load_helper(CPUArchState *env, target_ulong addr, TCGMemOpIdx oi,
     // memory might be still unmapped while reading or fetching
     if (mr == NULL) {
         handled = false;
+        // if there is already an unhandled eror, skip callbacks.
+        if (uc->invalid_error == UC_ERR_OK) {
             if (code_read) {
                 // code fetching
                 error_code = UC_ERR_FETCH_UNMAPPED;
@@ -1472,6 +1474,9 @@ load_helper(CPUArchState *env, target_ulong addr, TCGMemOpIdx oi,
                         break;
                 }
             }
+        } else {
+            error_code = uc->invalid_error;
+        }
 
         if (handled) {
             uc->invalid_error = UC_ERR_OK;