diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm')
| -rw-r--r-- | src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm b/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm new file mode 100644 index 00000000..a946080f --- /dev/null +++ b/src/VBox/Runtime/r0drv/os2/RTR0Os2DHVMGlobalToProcess.asm @@ -0,0 +1,148 @@ +; $Id: RTR0Os2DHVMGlobalToProcess.asm $ +;; @file +; IPRT - DevHelp_VMGlobalToProcess, Ring-0 Driver, OS/2. +; + +; +; Contributed by knut st. osmundsen. +; +; 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 +; -------------------------------------------------------------------- +; +; This code is based on: +; +; Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net> +; +; Permission is hereby granted, free of charge, to any person +; obtaining a copy of this software and associated documentation +; files (the "Software"), to deal in the Software without +; restriction, including without limitation the rights to use, +; copy, modify, merge, publish, distribute, sublicense, and/or sell +; copies of the Software, and to permit persons to whom the +; Software is furnished to do so, subject to the following +; conditions: +; +; The above copyright notice and this permission notice shall be +; included in all copies or substantial portions of the Software. +; +; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES +; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT +; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +; OTHER DEALINGS IN THE SOFTWARE. +; + + +;******************************************************************************* +;* Header Files * +;******************************************************************************* +%define RT_INCL_16BIT_SEGMENTS +%include "iprt/asmdefs.mac" +%include "iprt/err.mac" + + +;******************************************************************************* +;* External Symbols * +;******************************************************************************* +extern KernThunkStackTo32 +extern KernThunkStackTo16 +extern NAME(g_fpfnDevHlp) + + +;******************************************************************************* +;* Defined Constants And Macros * +;******************************************************************************* +%define DevHlp_VMGlobalToProcess 05ah + + +BEGINCODE + +;; +; VMGlobalToProcess wrapper. +; +; @param fFlags [ebp + 08h] Flags +; @param pvR0 [ebp + 0ch] Ring-0 memory. +; @param cb [ebp + 10h] Size of memory object to map. +; @param ppR3 [ebp + 14h] Where to store the address of the ring-3 mapping. +; +BEGINPROC_EXPORTED RTR0Os2DHVMGlobalToProcess + ; switch stack first. + call KernThunkStackTo16 + + ; normal prolog. + push ebp + mov ebp, esp + push dword [NAME(g_fpfnDevHlp)] ; ebp - 4 + push ebx ; save ebx + + ; setup the devhelp call + mov eax, [ebp + 08h] ; fFlags + mov ebx, [ebp + 0ch] ; pvR0 + mov ecx, [ebp + 10h] ; cb + mov dl, DevHlp_VMGlobalToProcess + + ; jump to the 16-bit code. + ;jmp far dword NAME(RTR0Os2DHQueryDOSVar_16) wrt CODE16 + db 066h + db 0eah + dw NAME(RTR0Os2DHVMGlobalToProcess_16) wrt CODE16 + dw CODE16 +BEGINCODE16 +GLOBALNAME RTR0Os2DHVMGlobalToProcess_16 + call far [ss:ebp - 4] + + ;jmp far dword NAME(RTR0Os2DHVMGlobalToProcess_32) wrt FLAT + db 066h + db 0eah + dd NAME(RTR0Os2DHVMGlobalToProcess_32) ;wrt FLAT + dw TEXT32 wrt FLAT +BEGINCODE +GLOBALNAME RTR0Os2DHVMGlobalToProcess_32 + jc .done + + ; save the result. + mov edx, [ebp + 14h] ; ppvR3 + mov [edx], eax + xor eax, eax + +.done: + pop ebx + leave + + ; switch stack back and return. + push eax + call KernThunkStackTo32 + pop eax + ret +ENDPROC RTR0Os2DHVMGlobalToProcess + |