| 1 | ; $Id: bs3-cmn-SelFar32ToFlat32NoClobber.asm 106061 2024-09-16 14:03:52Z 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) 2007-2024 Oracle and/or its affiliates.
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| 8 | ;
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| 9 | ; This file is part of VirtualBox base platform packages, as
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| 10 | ; available from https://www.virtualbox.org.
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| 11 | ;
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| 12 | ; This program is free software; you can redistribute it and/or
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| 13 | ; modify it under the terms of the GNU General Public License
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| 14 | ; as published by the Free Software Foundation, in version 3 of the
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| 15 | ; License.
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| 16 | ;
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| 17 | ; This program is distributed in the hope that it will be useful, but
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| 18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | ; General Public License for more details.
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| 21 | ;
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| 22 | ; You should have received a copy of the GNU General Public License
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| 23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | ;
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| 25 | ; The contents of this file may alternatively be used under the terms
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| 26 | ; of the Common Development and Distribution License Version 1.0
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| 27 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | ; in the VirtualBox distribution, in which case the provisions of the
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| 29 | ; CDDL are applicable instead of those of the GPL.
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| 30 | ;
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| 31 | ; You may elect to license modified versions of this file under the
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| 32 | ; terms and conditions of either the GPL or the CDDL or both.
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| 33 | ;
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| 34 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | ;
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| 36 |
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| 37 |
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| 38 | ;*********************************************************************************************************************************
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| 39 | ;* Header Files *
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| 40 | ;*********************************************************************************************************************************
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| 41 | %include "bs3kit-template-header.mac"
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| 42 |
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| 43 |
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| 44 | ;*********************************************************************************************************************************
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| 45 | ;* External Symbols *
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| 46 | ;*********************************************************************************************************************************
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| 47 | BS3_EXTERN_CMN Bs3SelFar32ToFlat32
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| 48 | TMPL_BEGIN_TEXT
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| 49 |
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| 50 |
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| 51 | ;;
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| 52 | ; Wrapper around the Bs3SelFar32ToFlat32 C function that doesn't
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| 53 | ; clobber any registers nor require 20h stack scratch area (64-bit).
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| 54 | ;
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| 55 | ; @uses Only return registers (ax:dx, eax, eax)
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| 56 | ; @remarks No 20h scratch space required in 64-bit mode.
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| 57 | ;
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| 58 | BS3_PROC_BEGIN_CMN Bs3SelFar32ToFlat32NoClobber, BS3_PBC_NEAR ; Far stub generated by the makefile.
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| 59 | push xBP
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| 60 | mov xBP, xSP
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| 61 |
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| 62 | %if TMPL_BITS == 16
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| 63 | push bx
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| 64 | push cx
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| 65 | push es
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| 66 |
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| 67 | push word [xBP + xCB + cbCurRetAddr + 4] ; uSel
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| 68 | push word [xBP + xCB + cbCurRetAddr + 2] ; high off
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| 69 | push word [xBP + xCB + cbCurRetAddr] ; low off
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| 70 | call Bs3SelFar32ToFlat32
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| 71 | add sp, 6
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| 72 |
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| 73 | pop es
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| 74 | pop cx
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| 75 | pop bx
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| 76 | %else
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| 77 | push xDX
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| 78 | push xCX
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| 79 | %if TMPL_BITS == 32
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| 80 | push es
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| 81 | push fs
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| 82 | push gs
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| 83 |
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| 84 | push dword [xBP + xCB + cbCurRetAddr + 4] ; uSel
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| 85 | push dword [xBP + xCB + cbCurRetAddr] ; off
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| 86 | call Bs3SelFar32ToFlat32
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| 87 | add esp, 8
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| 88 |
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| 89 | pop gs
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| 90 | pop fs
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| 91 | pop es
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| 92 | %else
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| 93 | push r8
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| 94 | push r9
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| 95 | push r10
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| 96 | push r11
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| 97 | sub rsp, 20h
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| 98 |
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| 99 | call Bs3SelFar32ToFlat32 ; Just pass ECX and DX along as-is.
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| 100 |
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| 101 | add rsp, 20h
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| 102 | pop r11
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| 103 | pop r10
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| 104 | pop r9
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| 105 | pop r8
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| 106 | %endif
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| 107 | pop xCX
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| 108 | pop xDX
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| 109 | %endif
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| 110 |
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| 111 | pop xBP
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| 112 | BS3_HYBRID_RET
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| 113 | BS3_PROC_END_CMN Bs3SelFar32ToFlat32NoClobber
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| 114 |
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