faluco@739: /**
faluco@739:  * vim: set ts=4 :
faluco@739:  * ===============================================================
ds@757:  * SourceMod BinTools Extension
ds@757:  * Copyright (C) 2004-2007 AlliedModders LLC. All rights reserved.
faluco@739:  * ===============================================================
faluco@739:  *
ds@757:  * This program is free software; you can redistribute it and/or
ds@757:  * modify it under the terms of the GNU General Public License
ds@757:  * as published by the Free Software Foundation; either version 2
ds@757:  * of the License, or (at your option) any later version.
ds@757:  * This program is distributed in the hope that it will be useful,
ds@757:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
ds@757:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
ds@757:  * GNU General Public License for more details.
faluco@739:  * 
ds@757:  * You should have received a copy of the GNU General Public License
ds@757:  * along with this program; if not, write to the Free Software
ds@757:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
faluco@739:  *
faluco@739:  * Version: $Id$
faluco@739:  */
faluco@739: 
faluco@739: #include "extension.h"
faluco@739: #include "CallWrapper.h"
faluco@739: 
faluco@739: CallWrapper::CallWrapper(CallConvention cv, const PassInfo *paramInfo, const PassInfo *retInfo, unsigned int numParams)
faluco@739: {
faluco@739: 	m_Cv = cv;
faluco@739: 
faluco@739: 	if (numParams)
faluco@739: 	{
faluco@739: 		m_Params = new PassEncode[numParams];
faluco@739: 		for (size_t i=0; i<numParams; i++)
faluco@739: 		{
faluco@739: 			m_Params[i].info = paramInfo[i];
faluco@739: 		}
faluco@739: 	}
faluco@739: 
faluco@739: 	if (retInfo)
faluco@739: 	{
faluco@739: 		m_RetParam = new PassInfo;
faluco@739: 		*m_RetParam = *retInfo;
faluco@739: 	} else {
faluco@739: 		m_RetParam = NULL;
faluco@739: 	}
faluco@739: 
faluco@739: 	m_NumParams = numParams;
faluco@739: 
faluco@739: 	/* Calculate virtual stack offsets for each parameter */
faluco@739: 	size_t offs = 0;
faluco@739: 
faluco@739: 	if (cv == CallConv_ThisCall)
faluco@739: 	{
faluco@739: 		offs += sizeof(void *);
faluco@739: 	}
faluco@739: 	for (size_t i=0; i<numParams; i++)
faluco@739: 	{
faluco@739: 		m_Params[i].offset = offs;
faluco@739: 		offs += m_Params[i].info.size;
faluco@739: 	}
faluco@739: }
faluco@739: 
faluco@739: CallWrapper::~CallWrapper()
faluco@739: {
faluco@739: 	delete [] m_Params;
faluco@739: 	delete m_RetParam;
faluco@739: 	g_SPEngine->ExecFree(m_Addrs[ADDR_CODEBASE]);
faluco@739: }
faluco@739: 
dvander@942: void CallWrapper::Destroy()
dvander@942: {
dvander@942: 	delete this;
dvander@942: }
dvander@942: 
faluco@739: CallConvention CallWrapper::GetCallConvention()
faluco@739: {
faluco@739: 	return m_Cv;
faluco@739: }
faluco@739: 
faluco@739: const PassEncode *CallWrapper::GetParamInfo(unsigned int num)
faluco@739: {
faluco@739: 	return (num+1 > m_NumParams) ? NULL : &m_Params[num];
faluco@739: }
faluco@739: 
faluco@739: const PassInfo *CallWrapper::GetReturnInfo()
faluco@739: {
faluco@739: 	return m_RetParam;
faluco@739: }
faluco@739: 
faluco@739: unsigned int CallWrapper::GetParamCount()
faluco@739: {
faluco@739: 	return m_NumParams;
faluco@739: }
faluco@739: 
faluco@739: void CallWrapper::Execute(void *vParamStack, void *retBuffer)
faluco@739: {
faluco@739: 	typedef void (*CALL_EXECUTE)(void *, void *);
faluco@739: 	CALL_EXECUTE fn = (CALL_EXECUTE)m_Addrs[ADDR_CODEBASE];
faluco@739: 	fn(vParamStack, retBuffer);
faluco@739: }