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; $Id: bs3-cmn-SelFar32ToFlat32NoClobber.asm $
;; @file
; BS3Kit - Bs3SelFar32ToFlat32NoClobber.
;
;
; Copyright (C) 2007-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
;*********************************************************************************************************************************
;* Header Files *
;*********************************************************************************************************************************
%include "bs3kit-template-header.mac"
;*********************************************************************************************************************************
;* External Symbols *
;*********************************************************************************************************************************
BS3_EXTERN_CMN Bs3SelFar32ToFlat32
TMPL_BEGIN_TEXT
;;
; Wrapper around the Bs3SelFar32ToFlat32 C function that doesn't
; clobber any registers nor require 20h stack scratch area (64-bit).
;
; @uses Only return registers (ax:dx, eax, eax)
; @remarks No 20h scratch space required in 64-bit mode.
;
BS3_PROC_BEGIN_CMN Bs3SelFar32ToFlat32NoClobber, BS3_PBC_NEAR ; Far stub generated by the makefile.
push xBP
mov xBP, xSP
%if TMPL_BITS == 16
push bx
push cx
push es
push word [xBP + xCB + cbCurRetAddr + 4] ; uSel
push word [xBP + xCB + cbCurRetAddr + 2] ; high off
push word [xBP + xCB + cbCurRetAddr] ; low off
call Bs3SelFar32ToFlat32
add sp, 6
pop es
pop cx
pop bx
%else
push xDX
push xCX
%if TMPL_BITS == 32
push es
push fs
push gs
push dword [xBP + xCB + cbCurRetAddr + 4] ; uSel
push dword [xBP + xCB + cbCurRetAddr] ; off
call Bs3SelFar32ToFlat32
add esp, 8
pop gs
pop fs
pop es
%else
push r8
push r9
push r10
push r11
sub rsp, 20h
call Bs3SelFar32ToFlat32 ; Just pass ECX and DX along as-is.
add rsp, 20h
pop r11
pop r10
pop r9
pop r8
%endif
pop xCX
pop xDX
%endif
pop xBP
BS3_HYBRID_RET
BS3_PROC_END_CMN Bs3SelFar32ToFlat32NoClobber
|
