MdePkg/Library/BaseLib/X64/SwitchStack.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 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 ; Module Name:
  13 ;
  14 ;   SwitchStack.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;------------------------------------------------------------------------------
  19
  20     .code
  21
  22 ;------------------------------------------------------------------------------
  23 ; Routine Description:
  24 ;
  25 ;   Routine for switching stacks with 1 parameter
  26 ;
  27 ; Arguments:
  28 ;
  29 ;   (rcx) EntryPoint    - Entry point with new stack.
  30 ;   (rdx) Context       - Parameter for entry point.
  31 ;   (r8)  Context2      - Parameter2 for entry point.
  32 ;   (r9)  NewStack      - Pointer to new stack.
  33 ;
  34 ; Returns:
  35 ;
  36 ;   None
  37 ;
  38 ;------------------------------------------------------------------------------
  39 _SwitchStack PROC
  40     mov     rax, rcx
  41     mov     rcx, rdx
  42     mov     rdx, r8
  43     lea     rsp, [r9 - 20h]
  44     call    rax
  45 _SwitchStack ENDP
  46
  47     END