EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ebc/SwitchStack.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12
  13 Module Name:
  14
  15   SwitchStack.c
  16
  17 Abstract:
  18
  19
  20 --*/
  21
  22 #include "..\BaseLibInternal.h"
  23
  24 /**
  25   Transfers control to a function starting with a new stack.
  26
  27   Transfers control to the function specified by EntryPoint using the new stack
  28   specified by NewStack and passing in the parameters specified by Context1 and
  29   Context2. Context1 and Context2 are optional and may be NULL. The function
  30   EntryPoint must never return.
  31
  32   If EntryPoint is NULL, then ASSERT().
  33   If NewStack is NULL, then ASSERT().
  34
  35   @param  EntryPoint  A pointer to function to call with the new stack.
  36   @param  Context1    A pointer to the context to pass into the EntryPoint
  37                       function.
  38   @param  Context2    A pointer to the context to pass into the EntryPoint
  39                       function.
  40   @param  NewStack    A pointer to the new stack to use for the EntryPoint
  41                       function.
  42
  43 **/
  44 VOID
  45 EFIAPI
  46 InternalSwitchStack (
  47   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,
  48   IN      VOID                      *Context1,  OPTIONAL
  49   IN      VOID                      *Context2,  OPTIONAL
  50   IN      VOID                      *NewStack
  51   )
  52 {
  53   //
  54   // This version of this function does not actually change the stack pointer
  55   // This is to support compilation of CPU types that do not support assemblers
  56   // such as EBC
  57   //
  58   EntryPoint (Context1, Context2);
  59 }