| 1 | ; $Id: bs3-cmn-ExtCtxRestore.asm 82968 2020-02-04 10:35:17Z vboxsync $
|
|---|
| 2 | ;; @file
|
|---|
| 3 | ; BS3Kit - Bs3ExtCtxRestore.
|
|---|
| 4 | ;
|
|---|
| 5 |
|
|---|
| 6 | ;
|
|---|
| 7 | ; Copyright (C) 2007-2020 Oracle Corporation
|
|---|
| 8 | ;
|
|---|
| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | ; available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | ; General Public License (GPL) as published by the Free Software
|
|---|
| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | ;
|
|---|
| 17 | ; The contents of this file may alternatively be used under the terms
|
|---|
| 18 | ; of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | ; CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | ;
|
|---|
| 23 | ; You may elect to license modified versions of this file under the
|
|---|
| 24 | ; terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | ;
|
|---|
| 26 |
|
|---|
| 27 | %include "bs3kit-template-header.mac"
|
|---|
| 28 |
|
|---|
| 29 |
|
|---|
| 30 | ;;
|
|---|
| 31 | ; Restores the extended CPU context (FPU, SSE, AVX, ++).
|
|---|
| 32 | ;
|
|---|
| 33 | ; @param pExtCtx
|
|---|
| 34 | ;
|
|---|
| 35 | BS3_PROC_BEGIN_CMN Bs3ExtCtxRestore, BS3_PBC_NEAR
|
|---|
| 36 | push xBP
|
|---|
| 37 | mov xBP, xSP
|
|---|
| 38 | push sAX
|
|---|
| 39 | push sCX
|
|---|
| 40 | push sDX
|
|---|
| 41 | push xBX
|
|---|
| 42 | BONLY16 push es
|
|---|
| 43 |
|
|---|
| 44 | %if ARCH_BITS == 16
|
|---|
| 45 | les bx, [xBP + xCB + cbCurRetAddr]
|
|---|
| 46 | mov al, [es:bx + BS3EXTCTX.enmMethod]
|
|---|
| 47 | cmp al, BS3EXTCTXMETHOD_XSAVE
|
|---|
| 48 | je .do_16_xsave
|
|---|
| 49 | cmp al, BS3EXTCTXMETHOD_FXSAVE
|
|---|
| 50 | je .do_16_fxsave
|
|---|
| 51 | cmp al, BS3EXTCTXMETHOD_ANCIENT
|
|---|
| 52 | je .do_16_ancient
|
|---|
| 53 | int3
|
|---|
| 54 |
|
|---|
| 55 | .do_16_ancient:
|
|---|
| 56 | frstor [es:bx + BS3EXTCTX.Ctx]
|
|---|
| 57 | jmp .return
|
|---|
| 58 |
|
|---|
| 59 | .do_16_fxsave:
|
|---|
| 60 | fxrstor [es:bx + BS3EXTCTX.Ctx]
|
|---|
| 61 | jmp .return
|
|---|
| 62 |
|
|---|
| 63 | .do_16_xsave:
|
|---|
| 64 | xor ecx, ecx
|
|---|
| 65 | mov eax, [es:bx + BS3EXTCTX.fXcr0Nominal]
|
|---|
| 66 | mov edx, [es:bx + BS3EXTCTX.fXcr0Nominal + 4]
|
|---|
| 67 | xsetbv
|
|---|
| 68 |
|
|---|
| 69 | xrstor [es:bx + BS3EXTCTX.Ctx]
|
|---|
| 70 |
|
|---|
| 71 | mov eax, [es:bx + BS3EXTCTX.fXcr0Saved]
|
|---|
| 72 | mov edx, [es:bx + BS3EXTCTX.fXcr0Saved + 4]
|
|---|
| 73 | xsetbv
|
|---|
| 74 | ;jmp .return
|
|---|
| 75 |
|
|---|
| 76 | %else
|
|---|
| 77 | BONLY32 mov ebx, [xBP + xCB + cbCurRetAddr]
|
|---|
| 78 | BONLY64 mov rbx, rcx
|
|---|
| 79 |
|
|---|
| 80 | mov al, [xBX + BS3EXTCTX.enmMethod]
|
|---|
| 81 | cmp al, BS3EXTCTXMETHOD_XSAVE
|
|---|
| 82 | je .do_xsave
|
|---|
| 83 | cmp al, BS3EXTCTXMETHOD_FXSAVE
|
|---|
| 84 | je .do_fxsave
|
|---|
| 85 | cmp al, BS3EXTCTXMETHOD_ANCIENT
|
|---|
| 86 | je .do_ancient
|
|---|
| 87 | int3
|
|---|
| 88 |
|
|---|
| 89 | .do_ancient:
|
|---|
| 90 | frstor [xBX + BS3EXTCTX.Ctx]
|
|---|
| 91 | jmp .return
|
|---|
| 92 |
|
|---|
| 93 | .do_fxsave:
|
|---|
| 94 | BONLY32 fxrstor [xBX + BS3EXTCTX.Ctx]
|
|---|
| 95 | BONLY64 fxrstor64 [xBX + BS3EXTCTX.Ctx]
|
|---|
| 96 | jmp .return
|
|---|
| 97 |
|
|---|
| 98 | .do_xsave:
|
|---|
| 99 | xor ecx, ecx
|
|---|
| 100 | mov eax, [xBX + BS3EXTCTX.fXcr0Nominal]
|
|---|
| 101 | mov edx, [xBX + BS3EXTCTX.fXcr0Nominal + 4]
|
|---|
| 102 | xsetbv
|
|---|
| 103 |
|
|---|
| 104 | BONLY32 xrstor [xBX + BS3EXTCTX.Ctx]
|
|---|
| 105 | BONLY64 xrstor64 [xBX + BS3EXTCTX.Ctx]
|
|---|
| 106 |
|
|---|
| 107 | mov eax, [xBX + BS3EXTCTX.fXcr0Saved]
|
|---|
| 108 | mov edx, [xBX + BS3EXTCTX.fXcr0Saved + 4]
|
|---|
| 109 | xsetbv
|
|---|
| 110 | ;jmp .return
|
|---|
| 111 |
|
|---|
| 112 | %endif
|
|---|
| 113 |
|
|---|
| 114 | .return:
|
|---|
| 115 | BONLY16 pop es
|
|---|
| 116 | pop xBX
|
|---|
| 117 | pop sDX
|
|---|
| 118 | pop sCX
|
|---|
| 119 | pop sAX
|
|---|
| 120 | mov xSP, xBP
|
|---|
| 121 | pop xBP
|
|---|
| 122 | ret
|
|---|
| 123 | BS3_PROC_END_CMN Bs3ExtCtxRestore
|
|---|
| 124 |
|
|---|
