| 1 | ; $Id: bs3-cmn-SelFar32ToFlat32NoClobber.asm 82968 2020-02-04 10:35:17Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3SelFar32ToFlat32NoClobber.
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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 |
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| 28 | ;*********************************************************************************************************************************
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| 29 | ;* Header Files *
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| 30 | ;*********************************************************************************************************************************
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| 31 | %include "bs3kit-template-header.mac"
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| 32 |
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| 33 |
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| 34 | ;*********************************************************************************************************************************
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| 35 | ;* External Symbols *
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| 36 | ;*********************************************************************************************************************************
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| 37 | BS3_EXTERN_CMN Bs3SelFar32ToFlat32
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| 38 | TMPL_BEGIN_TEXT
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| 39 |
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| 40 |
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| 41 | ;;
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| 42 | ; Wrapper around the Bs3SelFar32ToFlat32 C function that doesn't
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| 43 | ; clobber any registers nor require 20h stack scratch area (64-bit).
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| 44 | ;
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| 45 | ; @uses Only return registers (ax:dx, eax, eax)
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| 46 | ; @remarks No 20h scratch space required in 64-bit mode.
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| 47 | ;
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| 48 | BS3_PROC_BEGIN_CMN Bs3SelFar32ToFlat32NoClobber, BS3_PBC_NEAR ; Far stub generated by the makefile.
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| 49 | push xBP
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| 50 | mov xBP, xSP
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| 51 |
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| 52 | %if TMPL_BITS == 16
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| 53 | push bx
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| 54 | push cx
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| 55 | push es
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| 56 |
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| 57 | push word [xBP + xCB + cbCurRetAddr + 4] ; uSel
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| 58 | push word [xBP + xCB + cbCurRetAddr + 2] ; high off
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| 59 | push word [xBP + xCB + cbCurRetAddr] ; low off
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| 60 | call Bs3SelFar32ToFlat32
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| 61 | add sp, 6
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| 62 |
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| 63 | pop es
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| 64 | pop cx
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| 65 | pop bx
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| 66 | %else
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| 67 | push xDX
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| 68 | push xCX
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| 69 | %if TMPL_BITS == 32
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| 70 | push es
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| 71 | push fs
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| 72 | push gs
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| 73 |
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| 74 | push dword [xBP + xCB + cbCurRetAddr + 4] ; uSel
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| 75 | push dword [xBP + xCB + cbCurRetAddr] ; off
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| 76 | call Bs3SelFar32ToFlat32
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| 77 | add esp, 8
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| 78 |
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| 79 | pop gs
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| 80 | pop fs
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| 81 | pop es
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| 82 | %else
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| 83 | push r8
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| 84 | push r9
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| 85 | push r10
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| 86 | push r11
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| 87 | sub rsp, 20h
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| 88 |
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| 89 | call Bs3SelFar32ToFlat32 ; Just pass ECX and DX along as-is.
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| 90 |
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| 91 | add rsp, 20h
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| 92 | pop r11
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| 93 | pop r10
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| 94 | pop r9
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| 95 | pop r8
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| 96 | %endif
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| 97 | pop xCX
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| 98 | pop xDX
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| 99 | %endif
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| 100 |
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| 101 | pop xBP
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| 102 | BS3_HYBRID_RET
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| 103 | BS3_PROC_END_CMN Bs3SelFar32ToFlat32NoClobber
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| 104 |
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