187 lines
4.6 KiB
C++
187 lines
4.6 KiB
C++
/**
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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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#include "CallMaker.h"
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CallWrapper::CallWrapper(const SourceHook::ProtoInfo *protoInfo)
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{
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m_AddrCodeBase = NULL;
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m_AddrCallee = NULL;
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unsigned int argnum = protoInfo->numOfParams;
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m_Info = *protoInfo;
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m_Info.paramsPassInfo = new SourceHook::PassInfo[argnum + 1];
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memcpy((void *)m_Info.paramsPassInfo, protoInfo->paramsPassInfo, sizeof(SourceHook::PassInfo) * (argnum+1));
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if (argnum)
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{
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m_Params = new PassEncode[argnum];
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for (size_t i=0; i<argnum; i++)
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{
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GetSMPassInfo(&(m_Params[i].info), &(m_Info.paramsPassInfo[i+1]));
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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 (m_Info.retPassInfo.size != 0)
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{
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m_RetParam = new PassInfo;
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GetSMPassInfo(m_RetParam, &(m_Info.retPassInfo));
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} else {
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m_RetParam = NULL;
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}
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/* Calculate virtual stack offsets for each parameter */
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size_t offs = 0;
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if (m_Info.convention == SourceHook::ProtoInfo::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<argnum; 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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delete [] m_Info.paramsPassInfo;
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}
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void CallWrapper::Destroy()
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{
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if (m_AddrCodeBase != NULL)
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{
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g_SPEngine->FreePageMemory(m_AddrCodeBase);
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m_AddrCodeBase = NULL;
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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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/* Need to convert to a SourceMod convention for bcompat */
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return GetSMCallConvention((SourceHook::ProtoInfo::CallConvention)m_Info.convention);
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}
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const PassEncode *CallWrapper::GetParamInfo(unsigned int num)
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{
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if (num + 1 > GetParamCount())
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{
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return NULL;
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}
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return &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_Info.numOfParams;
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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)GetCodeBaseAddr();
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fn(vParamStack, retBuffer);
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}
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void CallWrapper::SetMemFuncInfo(const SourceHook::MemFuncInfo *funcInfo)
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{
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m_FuncInfo = *funcInfo;
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}
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SourceHook::MemFuncInfo *CallWrapper::GetMemFuncInfo()
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{
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return &m_FuncInfo;
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}
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void CallWrapper::SetCalleeAddr(void *addr)
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{
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m_AddrCallee = addr;
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}
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void CallWrapper::SetCodeBaseAddr(void *addr)
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{
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m_AddrCodeBase = addr;
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}
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void *CallWrapper::GetCalleeAddr()
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{
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return m_AddrCallee;
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}
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void *CallWrapper::GetCodeBaseAddr()
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{
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return m_AddrCodeBase;
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}
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const SourceHook::PassInfo *CallWrapper::GetSHReturnInfo()
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{
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return &(m_Info.retPassInfo);
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}
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SourceHook::ProtoInfo::CallConvention CallWrapper::GetSHCallConvention()
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{
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return (SourceHook::ProtoInfo::CallConvention)m_Info.convention;
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}
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const SourceHook::PassInfo * CallWrapper::GetSHParamInfo(unsigned int num)
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{
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if (num + 1 > GetParamCount())
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{
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return NULL;
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}
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return &(m_Info.paramsPassInfo[num+1]);
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}
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unsigned int CallWrapper::GetParamOffset(unsigned int num)
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{
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assert(num < GetParamCount() && num >= 0);
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return m_Params[num].offset;
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}
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