X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseLib%2FX64%2FSwitchStack.asm;fp=MdePkg%2FLibrary%2FBaseLib%2FX64%2FSwitchStack.asm;h=0dfddc011bb97674869354bfb91cf28df9f7cf81;hp=0000000000000000000000000000000000000000;hb=185d764218d07c06838d4758125a5ca66178e7c9;hpb=dd9f96de98c61f89d865600ce99cfd026711b02c

diff --git a/MdePkg/Library/BaseLib/X64/SwitchStack.asm b/MdePkg/Library/BaseLib/X64/SwitchStack.asm
new file mode 100644
index 0000000000..0dfddc011b
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/SwitchStack.asm
@@ -0,0 +1,47 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation
+; All rights reserved. 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.
+;
+; Module Name:
+;
+;   SwitchStack.Asm
+;
+; Abstract:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+;------------------------------------------------------------------------------
+; Routine Description:
+;
+;   Routine for switching stacks with 1 parameter
+;
+; Arguments:
+;
+;   (rcx) EntryPoint    - Entry point with new stack.
+;   (rdx) Context       - Parameter for entry point.
+;   (r8)  Context2      - Parameter2 for entry point.
+;   (r9)  NewStack      - Pointer to new stack.
+;
+; Returns:
+;
+;   None
+;
+;------------------------------------------------------------------------------
+SwitchStack PROC
+    mov     rax, rcx
+    mov     rcx, rdx
+    mov     rdx, r8
+    lea     rsp, [r9 - 20h]
+    call    rax
+SwitchStack ENDP
+
+    END