| 1 | ; $Id: bs3-cmn-ExtCtxSave.asm 82968 2020-02-04 10:35:17Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3ExtCtxSave.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2020 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 | %include "bs3kit-template-header.mac"
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| 28 |
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| 29 |
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| 30 | ;;
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| 31 | ; Saves the extended CPU context (FPU, SSE, AVX, ++).
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| 32 | ;
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| 33 | ; @param pExtCtx
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| 34 | ;
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| 35 | BS3_PROC_BEGIN_CMN Bs3ExtCtxSave, BS3_PBC_NEAR
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| 36 | push xBP
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| 37 | mov xBP, xSP
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| 38 | push sAX
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| 39 | push sCX
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| 40 | push sDX
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| 41 | push xBX
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| 42 | BONLY16 push es
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| 43 |
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| 44 | %if ARCH_BITS == 16
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| 45 | les bx, [xBP + xCB + cbCurRetAddr]
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| 46 | mov al, [es:bx + BS3EXTCTX.enmMethod]
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| 47 | cmp al, BS3EXTCTXMETHOD_XSAVE
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| 48 | je .do_16_xsave
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| 49 | cmp al, BS3EXTCTXMETHOD_FXSAVE
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| 50 | je .do_16_fxsave
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| 51 | cmp al, BS3EXTCTXMETHOD_ANCIENT
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| 52 | je .do_16_ancient
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| 53 | int3
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| 54 |
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| 55 | .do_16_ancient:
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| 56 | fnsave [es:bx + BS3EXTCTX.Ctx]
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| 57 | jmp .return
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| 58 |
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| 59 | .do_16_fxsave:
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| 60 | fxsave [es:bx + BS3EXTCTX.Ctx]
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| 61 | jmp .return
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| 62 |
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| 63 | .do_16_xsave:
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| 64 | xor ecx, ecx
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| 65 | xgetbv
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| 66 | mov [es:bx + BS3EXTCTX.fXcr0Saved], eax
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| 67 | mov [es:bx + BS3EXTCTX.fXcr0Saved + 4], edx
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| 68 | mov eax, [es:bx + BS3EXTCTX.fXcr0Nominal]
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| 69 | mov edx, [es:bx + BS3EXTCTX.fXcr0Nominal + 4]
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| 70 | xsetbv
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| 71 |
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| 72 | xsave [es:bx + BS3EXTCTX.Ctx]
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| 73 |
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| 74 | mov eax, [es:bx + BS3EXTCTX.fXcr0Saved]
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| 75 | mov edx, [es:bx + BS3EXTCTX.fXcr0Saved + 4]
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| 76 | xsetbv
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| 77 | ;jmp .return
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| 78 |
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| 79 | %else
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| 80 | BONLY32 mov ebx, [xBP + xCB + cbCurRetAddr]
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| 81 | BONLY64 mov rbx, rcx
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| 82 |
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| 83 | mov al, [xBX + BS3EXTCTX.enmMethod]
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| 84 | cmp al, BS3EXTCTXMETHOD_XSAVE
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| 85 | je .do_xsave
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| 86 | cmp al, BS3EXTCTXMETHOD_FXSAVE
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| 87 | je .do_fxsave
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| 88 | cmp al, BS3EXTCTXMETHOD_ANCIENT
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| 89 | je .do_ancient
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| 90 | int3
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| 91 |
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| 92 | .do_ancient:
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| 93 | fnsave [xBX + BS3EXTCTX.Ctx]
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| 94 | jmp .return
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| 95 |
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| 96 | .do_fxsave:
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| 97 | BONLY32 fxsave [xBX + BS3EXTCTX.Ctx]
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| 98 | BONLY64 fxsave64 [xBX + BS3EXTCTX.Ctx]
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| 99 | jmp .return
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| 100 |
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| 101 | .do_xsave:
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| 102 | xor ecx, ecx
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| 103 | xgetbv
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| 104 | mov [xBX + BS3EXTCTX.fXcr0Saved], eax
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| 105 | mov [xBX + BS3EXTCTX.fXcr0Saved + 4], edx
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| 106 | mov eax, [xBX + BS3EXTCTX.fXcr0Nominal]
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| 107 | mov edx, [xBX + BS3EXTCTX.fXcr0Nominal + 4]
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| 108 | xsetbv
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| 109 |
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| 110 | BONLY32 xsave [xBX + BS3EXTCTX.Ctx]
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| 111 | BONLY64 xsave64 [xBX + BS3EXTCTX.Ctx]
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| 112 |
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| 113 | mov eax, [xBX + BS3EXTCTX.fXcr0Saved]
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| 114 | mov edx, [xBX + BS3EXTCTX.fXcr0Saved + 4]
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| 115 | xsetbv
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| 116 | ;jmp .return
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| 117 |
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| 118 | %endif
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| 119 |
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| 120 | .return:
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| 121 | BONLY16 pop es
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| 122 | pop xBX
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| 123 | pop sDX
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| 124 | pop sCX
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| 125 | pop sAX
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| 126 | mov xSP, xBP
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| 127 | pop xBP
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| 128 | ret
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| 129 | BS3_PROC_END_CMN Bs3ExtCtxSave
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| 130 |
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