From f8fe689a81f906d1b91bb3220acde2a4ecb14c5b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 05:01:46 +0200 Subject: Adding upstream version 6.0.4-dfsg. Signed-off-by: Daniel Baumann --- .../common/asm/ASMSerializeInstruction-cpuid.asm | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/VBox/Runtime/common/asm/ASMSerializeInstruction-cpuid.asm (limited to 'src/VBox/Runtime/common/asm/ASMSerializeInstruction-cpuid.asm') diff --git a/src/VBox/Runtime/common/asm/ASMSerializeInstruction-cpuid.asm b/src/VBox/Runtime/common/asm/ASMSerializeInstruction-cpuid.asm new file mode 100644 index 00000000..b5294967 --- /dev/null +++ b/src/VBox/Runtime/common/asm/ASMSerializeInstruction-cpuid.asm @@ -0,0 +1,49 @@ +; $Id: ASMSerializeInstruction-cpuid.asm $ +;; @file +; IPRT - ASMSerializeInstruction() using cpuid. +; + +; +; Copyright (C) 2006-2019 Oracle Corporation +; +; This file is part of VirtualBox Open Source Edition (OSE), as +; available from http://www.virtualbox.org. This file is free software; +; you can redistribute it and/or modify it under the terms of the GNU +; General Public License (GPL) as published by the Free Software +; Foundation, in version 2 as it comes in the "COPYING" file of the +; VirtualBox OSE distribution. VirtualBox OSE is distributed in the +; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL) only, as it comes in the "COPYING.CDDL" file of the +; VirtualBox OSE distribution, in which case the provisions of the +; CDDL are applicable instead of those of the GPL. +; +; You may elect to license modified versions of this file under the +; terms and conditions of either the GPL or the CDDL or both. +; + + +;******************************************************************************* +;* Header Files * +;******************************************************************************* +%include "iprt/asmdefs.mac" + +BEGINCODE + + +;; +; Executes a seralizing instruction. +; +; The CPUID instruction isn't fast or slow, but it always triggers a VM EXIT in +; a virtualized environment, which is prohibitively expensive. +; +BEGINPROC_EXPORTED ASMSerializeInstructionCpuId + push xBX + xor eax, eax + cpuid + pop xBX + ret +ENDPROC ASMSerializeInstructionCpuId + -- cgit v1.2.3