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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10683 6f19259b-4bc3-4df7-8a09-765794883524
52 lines
1.5 KiB
NASM
52 lines
1.5 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; SwitchStack.Asm
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;
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; Abstract:
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;
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;------------------------------------------------------------------------------
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.code
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;------------------------------------------------------------------------------
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; Routine Description:
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;
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; Routine for switching stacks with 2 parameters
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;
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; Arguments:
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;
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; (rcx) EntryPoint - Entry point with new stack.
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; (rdx) Context1 - Parameter1 for entry point.
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; (r8) Context2 - Parameter2 for entry point.
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; (r9) NewStack - The pointer to new stack.
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;
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; Returns:
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;
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; None
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;
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;------------------------------------------------------------------------------
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InternalSwitchStack PROC
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mov rax, rcx
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mov rcx, rdx
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mov rdx, r8
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;
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; Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
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; in case the callee wishes to spill them.
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;
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lea rsp, [r9 - 20h]
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call rax
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InternalSwitchStack ENDP
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END
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