diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxSave.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxSave.asm | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxSave.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxSave.asm new file mode 100644 index 00000000..e6cbbd67 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxSave.asm @@ -0,0 +1,166 @@ +; $Id: bs3-cmn-ExtCtxSave.asm $ +;; @file +; BS3Kit - Bs3ExtCtxSave. +; + +; +; Copyright (C) 2007-2023 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 +; + +%include "bs3kit-template-header.mac" + +extern BS3_CMN_NM(Bs3RegSetXcr0) + +;; +; Saves the extended CPU context (FPU, SSE, AVX, ++). +; +; @param pExtCtx +; +BS3_PROC_BEGIN_CMN Bs3ExtCtxSave, BS3_PBC_NEAR + push xBP + mov xBP, xSP + push sAX + push sCX + push sDX + push xBX +BONLY16 push es + +%if ARCH_BITS == 16 + les bx, [xBP + xCB + cbCurRetAddr] + mov al, [es:bx + BS3EXTCTX.enmMethod] + cmp al, BS3EXTCTXMETHOD_XSAVE + je .do_16_xsave + cmp al, BS3EXTCTXMETHOD_FXSAVE + je .do_16_fxsave + cmp al, BS3EXTCTXMETHOD_ANCIENT + je .do_16_ancient + int3 + +.do_16_ancient: + fnsave [es:bx + BS3EXTCTX.Ctx] + jmp .return + +.do_16_fxsave: + fxsave [es:bx + BS3EXTCTX.Ctx] + jmp .return + +.do_16_xsave: + ; xgetbv can be used in any ring! + xor ecx, ecx + xgetbv + mov [es:bx + BS3EXTCTX.fXcr0Saved], eax + mov [es:bx + BS3EXTCTX.fXcr0Saved + 4], edx + + push dword [es:bx + BS3EXTCTX.fXcr0Nominal + 4] + push dword [es:bx + BS3EXTCTX.fXcr0Nominal] + call BS3_CMN_NM(Bs3RegSetXcr0) + + mov eax, [es:bx + BS3EXTCTX.fXcr0Nominal] + mov edx, [es:bx + BS3EXTCTX.fXcr0Nominal + 4] + xsave [es:bx + BS3EXTCTX.Ctx] + + push dword [es:bx + BS3EXTCTX.fXcr0Saved + 4] + push dword [es:bx + BS3EXTCTX.fXcr0Saved] + call BS3_CMN_NM(Bs3RegSetXcr0) + + add xSP, 4 * 2 * 2 ; clean up both calls + ;jmp .return + +%else +BONLY32 mov ebx, [xBP + xCB + cbCurRetAddr] +BONLY64 mov rbx, rcx + + mov al, [xBX + BS3EXTCTX.enmMethod] + cmp al, BS3EXTCTXMETHOD_XSAVE + je .do_xsave + cmp al, BS3EXTCTXMETHOD_FXSAVE + je .do_fxsave + cmp al, BS3EXTCTXMETHOD_ANCIENT + je .do_ancient + int3 + +.do_ancient: + fnsave [xBX + BS3EXTCTX.Ctx] + jmp .return + +.do_fxsave: +BONLY32 fxsave [xBX + BS3EXTCTX.Ctx] +BONLY64 fxsave64 [xBX + BS3EXTCTX.Ctx] + jmp .return + +.do_xsave: + xor ecx, ecx + xgetbv + mov [xBX + BS3EXTCTX.fXcr0Saved], eax + mov [xBX + BS3EXTCTX.fXcr0Saved + 4], edx + + %if ARCH_BITS == 32 + push dword [xBX + BS3EXTCTX.fXcr0Nominal + 4] + push dword [xBX + BS3EXTCTX.fXcr0Nominal] + call BS3_CMN_NM(Bs3RegSetXcr0) + + mov eax, [xBX + BS3EXTCTX.fXcr0Nominal] + mov edx, [xBX + BS3EXTCTX.fXcr0Nominal + 4] + xsave [xBX + BS3EXTCTX.Ctx] + + push dword [xBX + BS3EXTCTX.fXcr0Saved + 4] + push dword [xBX + BS3EXTCTX.fXcr0Saved] + call BS3_CMN_NM(Bs3RegSetXcr0) + + add xSP, 4 * 2 * 2 ; clean up both calls + %else + mov rcx, [xBX + BS3EXTCTX.fXcr0Nominal] + push rcx ; only to reserve necessary stack space for the Bs3RegSetXcr0 param dump. + call BS3_CMN_NM(Bs3RegSetXcr0) + + mov eax, [xBX + BS3EXTCTX.fXcr0Nominal] + mov edx, [xBX + BS3EXTCTX.fXcr0Nominal + 4] + xsave64 [xBX + BS3EXTCTX.Ctx] + + mov rcx, [xBX + BS3EXTCTX.fXcr0Saved] + call BS3_CMN_NM(Bs3RegSetXcr0) + + add xSP, 8h ; clean up + %endif + ;jmp .return + +%endif + +.return: +BONLY16 pop es + pop xBX + pop sDX + pop sCX + pop sAX + mov xSP, xBP + pop xBP + ret +BS3_PROC_END_CMN Bs3ExtCtxSave + |