1 files changed, 74 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMFxRstor.asm b/src/VBox/Runtime/common/asm/ASMFxRstor.asm
new file mode 100644
index 00000000..cb492048
--- /dev/null
+++ b/src/VBox/Runtime/common/asm/ASMFxRstor.asm
@@ -0,0 +1,74 @@
+; $Id: ASMFxRstor.asm $
+;; @file
+; IPRT - ASMFxRstor().
+;
+
+;
+; Copyright (C) 2006-2023 Oracle and/or its affiliates.
+;
+; This file is part of VirtualBox base platform packages, as
+; available from https://www.virtualbox.org.
+;
+; This program is free software; you can redistribute it and/or
+; modify it under the terms of the GNU General Public License
+; as published by the Free Software Foundation, in version 3 of the
+; License.
+;
+; This program is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; General Public License for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with this program; if not, see <https://www.gnu.org/licenses>.
+;
+; The contents of this file may alternatively be used under the terms
+; of the Common Development and Distribution License Version 1.0
+; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+; in the VirtualBox 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.
+;
+; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+;
+
+;*******************************************************************************
+;* Header Files                                                                *
+;*******************************************************************************
+%define RT_ASM_WITH_SEH64
+%include "iprt/asmdefs.mac"
+
+BEGINCODE
+
+;;
+; Loads extended CPU state.
+; @param    pFxState    Pointer to the FXRSTOR state area.
+;                       msc=rcx, gcc=rdi, x86=[esp+4]
+;
+RT_BEGINPROC ASMFxRstor
+SEH64_END_PROLOGUE
+%ifdef ASM_CALL64_MSC
+        o64 fxrstor [rcx]
+%elifdef ASM_CALL64_GCC
+        o64 fxrstor [rdi]
+%elif ARCH_BITS == 32
+        mov     ecx, [esp + 4]
+        fxrstor [ecx]
+%elif ARCH_BITS == 16
+        push    bp
+        mov     bp, sp
+        push    es
+        push    bx
+        les     bx, [bp + 4]
+        fxrstor [es:bx]
+        pop     bx
+        pop     es
+        pop     bp
+%else
+ %error "Undefined arch?"
+%endif
+        ret
+ENDPROC ASMFxRstor
+