1 files changed, 52 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Ebc/SwitchStack.c b/roms/edk2/MdePkg/Library/BaseLib/Ebc/SwitchStack.c
new file mode 100644
index 000000000..92cbef8d2
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseLib/Ebc/SwitchStack.c
@@ -0,0 +1,52 @@
+/** @file
+  Switch Stack functions.
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "BaseLibInternals.h"
+
+/**
+  Transfers control to a function starting with a new stack.
+
+  Transfers control to the function specified by EntryPoint using the
+  new stack specified by NewStack and passing in the parameters specified
+  by Context1 and Context2.  Context1 and Context2 are optional and may
+  be NULL.  The function EntryPoint must never return.
+  Marker will be ignored on IA-32, x64, and EBC.
+  IPF CPUs expect one additional parameter of type VOID * that specifies
+  the new backing store pointer.
+
+  If EntryPoint is NULL, then ASSERT().
+  If NewStack is NULL, then ASSERT().
+
+  @param  EntryPoint  A pointer to function to call with the new stack.
+  @param  Context1    A pointer to the context to pass into the EntryPoint
+                      function.
+  @param  Context2    A pointer to the context to pass into the EntryPoint
+                      function.
+  @param  NewStack    A pointer to the new stack to use for the EntryPoint
+                      function.
+  @param  Marker      A VA_LIST marker for the variable argument list.
+
+**/
+VOID
+EFIAPI
+InternalSwitchStack (
+  IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,
+  IN      VOID                      *Context1,   OPTIONAL
+  IN      VOID                      *Context2,   OPTIONAL
+  IN      VOID                      *NewStack,
+  IN      VA_LIST                   Marker
+  )
+
+{
+  //
+  // This version of this function does not actually change the stack pointer
+  // This is to support compilation of CPU types that do not support assemblers
+  // such as EBC
+  //
+  EntryPoint (Context1, Context2);
+}