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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 03:01:46 +0000 |
commit | f8fe689a81f906d1b91bb3220acde2a4ecb14c5b (patch) | |
tree | 26484e9d7e2c67806c2d1760196ff01aaa858e8c /src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm | |
parent | Initial commit. (diff) | |
download | virtualbox-upstream.tar.xz virtualbox-upstream.zip |
Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm b/src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm new file mode 100644 index 00000000..2213d8fb --- /dev/null +++ b/src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm @@ -0,0 +1,71 @@ +; $Id: ASMAtomicReadU64.asm $ +;; @file +; IPRT - ASMAtomicReadU64(). +; + +; +; 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 + +;; +; Atomically reads 64-bit value. +; +; @param pu64 x86:ebp+8 +; +; @returns The current value. (x86:eax+edx) +; +; +BEGINPROC_EXPORTED ASMAtomicReadU64 +%ifdef RT_ARCH_AMD64 + mfence ; ASSUME its present. + %ifdef ASM_CALL64_MSC + mov rax, [rcx] + %else + mov rax, [rdi] + %endif + ret +%endif +%ifdef RT_ARCH_X86 + push ebp + mov ebp, esp + push ebx + push edi + + xor eax, eax + xor edx, edx + mov edi, [ebp+08h] + xor ecx, ecx + xor ebx, ebx + lock cmpxchg8b [edi] + + pop edi + pop ebx + leave + ret +%endif +ENDPROC ASMAtomicReadU64 + |