From da6d526e9c2583e96058a4ed607b2f05f65ac48f Mon Sep 17 00:00:00 2001
From: "chao.an" <anchao@xiaomi.com>
Date: Wed, 24 Aug 2022 18:28:18 +0800
Subject: [PATCH] arch/sim: fix visual studio Linker Tools Error LNK2019

nuttx_all.lib(up_initialstate.obj) : error LNK2019:
  unresolved external symbol '___builtin_frame_addres' referenced in function '_up_getsp'

Return stack pointer from esp

Signed-off-by: chao.an <anchao@xiaomi.com>
---
 arch/sim/include/irq.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/sim/include/irq.h b/arch/sim/include/irq.h
index 03c90b0c06..8c177a9c08 100644
--- a/arch/sim/include/irq.h
+++ b/arch/sim/include/irq.h
@@ -77,7 +77,13 @@ extern "C"
 
 static inline uintptr_t up_getsp(void)
 {
+#ifdef _MSC_VER
+  uintptr_t regval;
+  __asm mov regval, esp;
+  return regval;
+#else
   return (uintptr_t)__builtin_frame_address(0);
+#endif
 }
 
 /****************************************************************************