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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm')
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diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm
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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
+