112 lines
3.0 KiB
C++
112 lines
3.0 KiB
C++
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/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod BinTools Extension
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* Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include "extension.h"
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#include "CallWrapper.h"
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CallWrapper::CallWrapper(CallConvention cv, const PassInfo *paramInfo, const PassInfo *retInfo, unsigned int numParams)
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{
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m_Cv = cv;
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if (numParams)
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{
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m_Params = new PassEncode[numParams];
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for (size_t i=0; i<numParams; i++)
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{
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m_Params[i].info = paramInfo[i];
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}
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} else {
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m_Params = NULL;
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}
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if (retInfo)
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{
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m_RetParam = new PassInfo;
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*m_RetParam = *retInfo;
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} else {
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m_RetParam = NULL;
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}
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m_NumParams = numParams;
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/* Calculate virtual stack offsets for each parameter */
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size_t offs = 0;
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if (cv == CallConv_ThisCall)
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{
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offs += sizeof(void *);
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}
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for (size_t i=0; i<numParams; i++)
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{
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m_Params[i].offset = offs;
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offs += m_Params[i].info.size;
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}
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}
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CallWrapper::~CallWrapper()
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{
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delete [] m_Params;
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delete m_RetParam;
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g_SPEngine->FreePageMemory(m_Addrs[ADDR_CODEBASE]);
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}
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void CallWrapper::Destroy()
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{
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delete this;
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}
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CallConvention CallWrapper::GetCallConvention()
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{
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return m_Cv;
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}
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const PassEncode *CallWrapper::GetParamInfo(unsigned int num)
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{
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return (num+1 > m_NumParams) ? NULL : &m_Params[num];
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}
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const PassInfo *CallWrapper::GetReturnInfo()
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{
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return m_RetParam;
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}
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unsigned int CallWrapper::GetParamCount()
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{
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return m_NumParams;
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}
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void CallWrapper::Execute(void *vParamStack, void *retBuffer)
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{
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typedef void (*CALL_EXECUTE)(void *, void *);
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CALL_EXECUTE fn = (CALL_EXECUTE)m_Addrs[ADDR_CODEBASE];
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fn(vParamStack, retBuffer);
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}
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