diff --git a/target/hexagon/helper.h b/target/hexagon/helper.h
index 64456822bc..28b9b59e0f 100644
--- a/target/hexagon/helper.h
+++ b/target/hexagon/helper.h
@@ -107,3 +107,11 @@ DEF_HELPER_4(probe_noshuf_load, void, env, i32, int, int)
 DEF_HELPER_2(probe_pkt_scalar_store_s0, void, env, int)
 DEF_HELPER_2(probe_hvx_stores, void, env, int)
 DEF_HELPER_2(probe_pkt_scalar_hvx_stores, void, env, int)
+
+#if !defined(CONFIG_USER_ONLY)
+DEF_HELPER_2(sreg_read, i32, env, i32)
+DEF_HELPER_2(sreg_read_pair, i64, env, i32)
+DEF_HELPER_2(greg_read, i32, env, i32)
+DEF_HELPER_2(greg_read_pair, i64, env, i32)
+DEF_HELPER_3(sreg_write_masked, void, env, i32, i32)
+#endif
diff --git a/target/hexagon/op_helper.c b/target/hexagon/op_helper.c
index 5b9c266d02..cd324c19a9 100644
--- a/target/hexagon/op_helper.c
+++ b/target/hexagon/op_helper.c
@@ -1374,6 +1374,34 @@ void HELPER(vwhist128qm)(CPUHexagonState *env, int32_t uiV)
     }
 }
 
+#ifndef CONFIG_USER_ONLY
+void HELPER(sreg_write_masked)(CPUHexagonState *env, uint32_t reg, uint32_t val)
+{
+    g_assert_not_reached();
+}
+
+uint32_t HELPER(sreg_read)(CPUHexagonState *env, uint32_t reg)
+{
+    g_assert_not_reached();
+}
+
+uint64_t HELPER(sreg_read_pair)(CPUHexagonState *env, uint32_t reg)
+{
+    g_assert_not_reached();
+}
+
+uint32_t HELPER(greg_read)(CPUHexagonState *env, uint32_t reg)
+{
+    g_assert_not_reached();
+}
+
+uint64_t HELPER(greg_read_pair)(CPUHexagonState *env, uint32_t reg)
+{
+    g_assert_not_reached();
+}
+#endif
+
+
 /* These macros can be referenced in the generated helper functions */
 #define warn(...) /* Nothing */
 #define fatal(...) g_assert_not_reached();