1 files changed, 45 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Arm/SwitchStack.asm b/Core/MdePkg/Library/BaseLib/Arm/SwitchStack.asm
new file mode 100644
index 0000000000..6517757bf7
--- /dev/null
+++ b/Core/MdePkg/Library/BaseLib/Arm/SwitchStack.asm
@@ -0,0 +1,45 @@
+;------------------------------------------------------------------------------ 
+;
+; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+  
+    EXPORT InternalSwitchStackAsm
+            
+    AREA   Switch_Stack, CODE, READONLY
+  
+;/**
+;  This allows the caller to switch the stack and goes to the new entry point
+;
+; @param      EntryPoint   The pointer to the location to enter
+; @param      Context      Parameter to pass in
+; @param      Context2     Parameter2 to pass in
+; @param      NewStack     New Location of the stack
+;
+; @return     Nothing. Goes to the Entry Point passing in the new parameters
+;
+;**/
+;VOID
+;EFIAPI
+;InternalSwitchStackAsm (
+;  SWITCH_STACK_ENTRY_POINT EntryPoint,
+;  VOID  *Context,
+;  VOID  *Context2,
+;  VOID  *NewStack
+;  );
+;
+InternalSwitchStackAsm
+    MOV   LR, R0
+    MOV   SP, R3
+    MOV   R0, R1
+    MOV   R1, R2
+    BX    LR
+    END