From 3b681586c00faee5e4e63e8659ee06589996219a Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 20 Dec 2016 08:30:52 -0600
Subject: [PATCH] Xtensa ESP32: Missing prologue/epilogue macros on C callable
 function

---
 arch/xtensa/src/esp32/esp32_cpuindex.S | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/xtensa/src/esp32/esp32_cpuindex.S b/arch/xtensa/src/esp32/esp32_cpuindex.S
index f62eed12020..0a9abc27fd8 100644
--- a/arch/xtensa/src/esp32/esp32_cpuindex.S
+++ b/arch/xtensa/src/esp32/esp32_cpuindex.S
@@ -39,6 +39,7 @@
  * Included Files
  ****************************************************************************/
 
+#include "xtensa_abi.h"
 #include "chip_macros.h"
 
 /****************************************************************************
@@ -71,6 +72,8 @@
 	.type	up_cpu_index, @function
 
 up_cpu_index:
+	ENTRY(16)
 	getcoreid	a2
-	ret
+	RET(16)
+
 	.size	up_cpu_index, . - up_cpu_index