| 1 | ; $Id: bs3-cmn-ExtCtxRestore.asm 66214 2017-03-22 20:56:06Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3ExtCtxRestore.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2017 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 | ; Restores 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 Bs3ExtCtxRestore, BS3_PBC_NEAR
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| 36 | push xBP
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| 37 | mov xBP, xSP
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| 38 | push xAX
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| 39 | BONLY32 push xCX
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| 40 | BONLY16 push es
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| 41 | BONLY16 push bx
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| 42 |
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| 43 | %if ARCH_BITS == 16
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| 44 | les bx, [xBP + xCB + cbCurRetAddr]
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| 45 | mov al, [es:bx + BS3EXTCTX.enmMethod]
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| 46 | cmp al, BS3EXTCTXMETHOD_XSAVE
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| 47 | je .do_16_xsave
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| 48 | cmp al, BS3EXTCTXMETHOD_FXSAVE
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| 49 | je .do_16_fxsave
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| 50 | cmp al, BS3EXTCTXMETHOD_ANCIENT
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| 51 | je .do_16_ancient
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| 52 | int3
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| 53 |
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| 54 | .do_16_ancient:
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| 55 | frstor [es:bx + BS3EXTCTX.Ctx]
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| 56 | jmp .return
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| 57 |
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| 58 | .do_16_xsave:
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| 59 | xrstor [es:bx + BS3EXTCTX.Ctx]
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| 60 | jmp .return
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| 61 |
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| 62 | .do_16_fxsave:
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| 63 | fxrstor [es:bx + BS3EXTCTX.Ctx]
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| 64 | ;jmp .return
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| 65 |
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| 66 | %else
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| 67 | BONLY32 mov ecx, [xBP + xCB + cbCurRetAddr]
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| 68 |
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| 69 | mov al, [xCX + BS3EXTCTX.enmMethod]
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| 70 | cmp al, BS3EXTCTXMETHOD_XSAVE
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| 71 | je .do_xsave
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| 72 | cmp al, BS3EXTCTXMETHOD_FXSAVE
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| 73 | je .do_fxsave
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| 74 | cmp al, BS3EXTCTXMETHOD_ANCIENT
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| 75 | je .do_ancient
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| 76 | int3
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| 77 |
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| 78 | .do_ancient:
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| 79 | frstor [xCX + BS3EXTCTX.Ctx]
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| 80 | jmp .return
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| 81 |
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| 82 | .do_xsave:
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| 83 | BONLY32 xrstor [xCX + BS3EXTCTX.Ctx]
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| 84 | BONLY64 xrstor64 [xCX + BS3EXTCTX.Ctx]
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| 85 | jmp .return
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| 86 |
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| 87 | .do_fxsave:
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| 88 | BONLY32 fxrstor [xCX + BS3EXTCTX.Ctx]
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| 89 | BONLY64 fxrstor64 [xCX + BS3EXTCTX.Ctx]
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| 90 | ;jmp .return
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| 91 |
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| 92 | %endif
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| 93 |
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| 94 | .return:
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| 95 | BONLY16 pop bx
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| 96 | BONLY16 pop es
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| 97 | BONLY32 pop xCX
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| 98 | pop xAX
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| 99 | mov xSP, xBP
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| 100 | pop xBP
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| 101 | ret
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| 102 | BS3_PROC_END_CMN Bs3ExtCtxRestore
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| 103 |
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| 104 |
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