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46 lines
1.2 KiB
NASM
46 lines
1.2 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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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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DEFAULT REL
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SECTION .text
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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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global ASM_PFX(InternalSwitchStack)
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ASM_PFX(InternalSwitchStack):
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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 - 0x20]
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call rax
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