diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm new file mode 100644 index 00000000..d2df7366 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SelFar32ToFlat32NoClobber.asm @@ -0,0 +1,114 @@ +; $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 + |