diff --git a/plat/renesas/rcar/rcar_stack_protector.c b/plat/renesas/rcar/rcar_stack_protector.c
new file mode 100644
index 0000000..ecceef4
--- /dev/null
+++ b/plat/renesas/rcar/rcar_stack_protector.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021-2023, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+
+#define RANDOM_CANARY_VALUE ((u_register_t)0xDFF5FC8A720E205EULL)
+
+u_register_t plat_get_stack_protector_canary(void)
+{
+	u_register_t cnt;
+	u_register_t seed;
+	u_register_t mul;
+	u_register_t ret;
+	uintptr_t val1 = (uintptr_t)__builtin_return_address(0U);
+	uintptr_t val2 = (uintptr_t)__builtin_frame_address(0U);
+
+	cnt = read_cntpct_el0();
+	seed = (cnt ^ RANDOM_CANARY_VALUE) & ULONG_MAX;
+	ret = seed;
+
+	if ((ULONG_MAX/val1) > seed) {
+		mul = (u_register_t)(val1 * seed);
+		if ((mul < ULONG_MAX) &&
+				((ULONG_MAX - (u_register_t)mul) > val2)) {
+			ret = mul + val2;
+		}
+	}
+
+	return ret;
+}