128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
// ******************************************************************
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// *
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// * .,-::::: .,:: .::::::::. .,:: .:
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// * ,;;;'````' `;;;, .,;; ;;;'';;' `;;;, .,;;
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// * [[[ '[[,,[[' [[[__[[\. '[[,,[['
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// * $$$ Y$$$P $$""""Y$$ Y$$$P
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// * `88bo,__,o, oP"``"Yo, _88o,,od8P oP"``"Yo,
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// * "YUMMMMMP",m" "Mm,""YUMMMP" ,m" "Mm,
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// *
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// * Cxbx->Win32->CxbxKrnl->EmuFS.cpp
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// *
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// * This file is part of the Cxbx project.
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// *
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// * Cxbx and Cxbe are free software; you can redistribute them
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// * and/or modify them under the terms of the GNU General Public
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// * License as published by the Free Software Foundation; either
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// * version 2 of the license, or (at your option) any later version.
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// *
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// * This program is distributed in the hope that it will be useful,
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// * but WITHOUT ANY WARRANTY; without even the implied warranty of
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// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// * GNU General Public License for more details.
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// *
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// * You should have recieved a copy of the GNU General Public License
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// * along with this program; see the file COPYING.
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// * If not, write to the Free Software Foundation, Inc.,
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// * 59 Temple Place - Suite 330, Bostom, MA 02111-1307, USA.
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// *
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// * (c) 2002-2003 Aaron Robinson <caustik@caustik.com>
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// *
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// * All rights reserved
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// *
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// ******************************************************************
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#include "Cxbx.h"
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#include "Emu.h"
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using namespace win32;
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// ******************************************************************
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// * func: EmuInitFS
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// ******************************************************************
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void EmuInitFS()
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{
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EmuInitLDT();
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}
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// ******************************************************************
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// * func: EmuGenerateFS
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// ******************************************************************
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void EmuGenerateFS()
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{
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NT_TIB *OrgNtTib;
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xboxkrnl::KPCR *NewPcr;
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uint16 NewFS=0;
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uint16 OrgFS=0;
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uint32 dwSize = sizeof(xboxkrnl::KPCR);
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NewPcr = (xboxkrnl::KPCR*)new char[dwSize];
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memset(NewPcr, 0, sizeof(*NewPcr));
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NewFS = EmuAllocateLDT((uint32)NewPcr, (uint32)NewPcr + dwSize);
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// ******************************************************************
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// * Obtain "OrgFS"
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// ******************************************************************
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__asm
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{
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// Obtain "OrgFS"
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mov ax, fs
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mov OrgFS, ax
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// Obtain "OrgNtTib"
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mov eax, fs:[0x18]
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mov OrgNtTib, eax
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// Save "NewFS" inside OrgFS.ArbitraryUserPointer
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mov ax, NewFS
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mov fs:[0x14], ax
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}
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// ******************************************************************
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// * Generate TIB
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// ******************************************************************
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{
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void *TLSPtr = 0;
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xboxkrnl::KTHREAD *KThread = new xboxkrnl::KTHREAD();
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memcpy(&NewPcr->NtTib, OrgNtTib, sizeof(NT_TIB));
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NewPcr->NtTib.Self = &NewPcr->NtTib;
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NewPcr->PrcbData.CurrentThread = KThread;
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NewPcr->Prcb = &NewPcr->PrcbData;
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// Retrieve Win2k/XP TEB.ThreadLocalStoragePointer
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__asm
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{
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mov eax, fs:[0x2C]
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mov TLSPtr, eax
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}
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KThread->TlsData = (void*)TLSPtr;
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}
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// ******************************************************************
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// * Swap into the "NewFS"
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// ******************************************************************
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EmuSwapFS();
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// ******************************************************************
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// * Save "OrgFS" inside NewFS.ArbitraryUserPointer
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// ******************************************************************
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__asm
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{
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mov ax, OrgFS
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mov fs:[0x14], ax // NewFS.ArbitraryUserPointer
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}
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// ******************************************************************
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// * Swap back into the "OrgFS"
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// ******************************************************************
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EmuSwapFS();
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} |