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Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TestDoModesByOneHlp.asm')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TestDoModesByOneHlp.asm | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TestDoModesByOneHlp.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TestDoModesByOneHlp.asm new file mode 100644 index 00000000..46dd230a --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-TestDoModesByOneHlp.asm @@ -0,0 +1,253 @@ +; $Id: bs3-cmn-TestDoModesByOneHlp.asm $ +;; @file +; BS3Kit - Bs3TestDoModesByOne Helpers for switching to the bit-count of the worker function. +; + +; +; 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" + + +;********************************************************************************************************************************* +;* Global Variables * +;********************************************************************************************************************************* +BS3_BEGIN_DATA16 +BS3_GLOBAL_NAME_EX BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent),,0 + RTCCPTR_DEF 0 + + +;********************************************************************************************************************************* +;* Exported Symbols * +;********************************************************************************************************************************* +%ifdef BS3_STRICT +BS3_EXTERN_DATA16 g_bBs3CurrentMode +%endif + +%if TMPL_BITS == 16 +BS3_BEGIN_TEXT16 +extern _Bs3SelRealModeCodeToProtMode_c16 +%endif + + +;; +; @cproto FNBS3TESTDOMODE +; +; @param bMode The current mode +; @uses What allowed by calling convention and possibly mode, caller deals with it. +; + +%if TMPL_BITS == 16 + ; + ; For 16-bit workers. + ; +BS3_BEGIN_TEXT16 + +BS3_SET_BITS 32 +BS3_PROC_BEGIN _Bs3TestCallDoerTo16_c32 + push xBP + mov xBP, xSP + + ; Load bMode into eax. + movzx eax, byte [xBP + xCB*2] + %ifdef BS3_STRICT + cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)] + je .ok_mode + int3 +.ok_mode: + %endif + ; Switch to 16-bit. + extern _Bs3SwitchTo16Bit_c32 + call _Bs3SwitchTo16Bit_c32 + BS3_SET_BITS 16 + + push ax ; Worker bMode argument. + + ; Assuming real mode far pointer, convert protected mode before calling it. + push word [2 + BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] + call _Bs3SelRealModeCodeToProtMode_c16 + add sp, 2 + + push cs ; return selector + push word .return ; return address + + push ax ; call converted selector + push word [BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] ; call offset + retf + +.return: + ; Switch back to 32-bit mode. + extern _Bs3SwitchTo32Bit_c16 + call _Bs3SwitchTo32Bit_c16 + BS3_SET_BITS 32 + + leave + ret +BS3_PROC_END _Bs3TestCallDoerTo16_c32 + + +BS3_SET_BITS 64 +BS3_PROC_BEGIN _Bs3TestCallDoerTo16_c64 + push xBP + mov xBP, xSP + + ; Load bMode into eax. + movzx eax, cl + %ifdef BS3_STRICT + cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)] + je .ok_mode + int3 +.ok_mode: + %endif + ; Switch to 16-bit. + extern _Bs3SwitchTo16Bit_c64 + call _Bs3SwitchTo16Bit_c64 + BS3_SET_BITS 16 + + push ax ; Worker bMode argument. + + ; Assuming real mode far pointer, convert protected mode before calling it. + push word [2 + BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] + call _Bs3SelRealModeCodeToProtMode_c16 + add sp, 2 + + push cs ; return selector + push word .return ; return address + push ax ; call converted selector + push word [BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] ; call offset + retf + +.return: + ; Switch back to 64-bit mode. + extern _Bs3SwitchTo64Bit_c16 + call _Bs3SwitchTo64Bit_c16 + BS3_SET_BITS 64 + + leave + ret +BS3_PROC_END _Bs3TestCallDoerTo16_c64 + + +%elif TMPL_BITS == 32 + ; + ; For 32-bit workers. + ; + +BS3_BEGIN_TEXT16 +BS3_SET_BITS 16 +BS3_PROC_BEGIN _Bs3TestCallDoerTo32_f16 + push xBP + mov xBP, xSP + + ; Load bMode into eax. + movzx eax, byte [xBP + xCB + sCB] + %ifdef BS3_STRICT + cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)] + je .ok_mode + int3 +.ok_mode: + %endif + ; Switch to 32-bit. + extern _Bs3SwitchTo32Bit_c16 + call _Bs3SwitchTo32Bit_c16 + BS3_SET_BITS 32 + + push eax ; Worker bMode argument. + + test al, BS3_MODE_CODE_V86 + jnz .return_to_v86 ; Need to figure this while we still have the mode value. + + call [BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] + + ; Switch back to 16-bit mode. + extern _Bs3SwitchTo16Bit_c32 + call _Bs3SwitchTo16Bit_c32 + BS3_SET_BITS 16 +.return: + leave + retf + + BS3_SET_BITS 32 +.return_to_v86: + call [BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] + + ; Switch back to v8086 mode. + extern _Bs3SwitchTo16BitV86_c32 + call _Bs3SwitchTo16BitV86_c32 + BS3_SET_BITS 16 + jmp .return +BS3_PROC_END _Bs3TestCallDoerTo32_f16 + + +BS3_BEGIN_TEXT32 +BS3_SET_BITS 64 +BS3_PROC_BEGIN _Bs3TestCallDoerTo32_c64 + push xBP + mov xBP, xSP + + ; Load bMode into eax. + movzx eax, cl + %ifdef BS3_STRICT + cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)] + je .ok_mode + int3 +.ok_mode: + %endif + ; Switch to 32-bit. + extern _Bs3SwitchTo32Bit_c64 + call _Bs3SwitchTo32Bit_c64 + BS3_SET_BITS 32 + + push eax ; Worker bMode argument. + call [BS3_DATA16_WRT(BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent))] + + ; Switch back to 64-bit mode. + extern _Bs3SwitchTo64Bit_c32 + call _Bs3SwitchTo64Bit_c32 + BS3_SET_BITS 64 + + leave + ret +BS3_PROC_END _Bs3TestCallDoerTo32_c64 + + +%elif TMPL_BITS == 64 +; +; 64-bit workers makes no sense, so skip that. +; +%else + %error "TMPL_BITS!" +%endif + |