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PEFile.cpp
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#include "StdAfx.h"
#include "DlgMain.h"
#include "PEFile.h"
#include "EngineHandler.h"
#include "Imagehlp.h"
const DWORD ZEROFIND_MINZEROS=1000000;
const DWORD ZEROFIND_MINSECT=5000000;
CImportRecord::CImportRecord()
{
Clear();
}
CImportRecord::CImportRecord(const TCHAR *szLibName,const char *szApiName,DWORD n_dwReferenceRVA,DWORD n_dwRecordRVA,EImportRecordType n_Type)
{
Clear();
sLibName=szLibName;
sApiName=szApiName;
dwReferenceRVA=n_dwReferenceRVA;
dwRecordRVA=n_dwRecordRVA;
Type=n_Type;
}
CImportRecord::CImportRecord(const TCHAR *szLibName,WORD n_wOrdinal,DWORD n_dwReferenceRVA,DWORD n_dwRecordRVA,EImportRecordType n_Type)
{
Clear();
sLibName=szLibName;
wOrdinal=n_wOrdinal;
dwReferenceRVA=n_dwReferenceRVA;
dwRecordRVA=n_dwRecordRVA;
Type=n_Type;
}
void CImportRecord::Clear()
{
sLibName.clear();
sApiName.clear();
wOrdinal=0;
dwReferenceRVA=0;
dwRecordRVA=0;
NameRVA=0;
Type=itNone;
nLib=-1;
nApi=-1;
nTrampoline=-1;
}
void CImport::Clear()
{
Records.clear();
}
void CImport::AddRecord(const CImportRecord &ImportRecord)
{
for(size_t i=0;i!=Records.size();++i)
{
if(Records[i].dwRecordRVA==ImportRecord.dwRecordRVA && Records[i].dwReferenceRVA==ImportRecord.dwReferenceRVA)
return;
}
Records.push_back(ImportRecord);
}
void CImport::ReadFromFile(const CPEFile &File)
{
Clear();
CImportRecord ImportRecord;
DWORD dwPosRVA=File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
for(;;)
{
IMAGE_IMPORT_DESCRIPTOR *pImports=(IMAGE_IMPORT_DESCRIPTOR*)File.RVA(dwPosRVA);
if(pImports==NULL || File.RVA(pImports->Name)==NULL)
return;
DWORD dwRecRVA=pImports->OriginalFirstThunk;
if(dwRecRVA==0)
dwRecRVA=pImports->FirstThunk;
if(dwRecRVA==0)
{
dwPosRVA+=sizeof(IMAGE_IMPORT_DESCRIPTOR);
continue;
}
#ifdef UNICODE
char *pMultiArray=(char*)File.RVA(pImports->Name);
int nMultiLength=(int)strlen(pMultiArray)+1;
WCHAR *pWideArray=new WCHAR[nMultiLength];
MultiByteToWideChar(CP_ACP,0,pMultiArray,nMultiLength,pWideArray,nMultiLength);
ImportRecord.sLibName=pWideArray;
delete[] pWideArray;
#else
ImportRecord.sLibName=(char*)File.RVA(pImports->Name);
#endif
for(;;)
{
IMAGE_THUNK_DATA *pRecAddr=(IMAGE_THUNK_DATA*)File.RVA(dwRecRVA);
if(pRecAddr->u1.AddressOfData==0)
break;
if(IMAGE_SNAP_BY_ORDINAL(pRecAddr->u1.Ordinal))
{
ImportRecord.sApiName.clear();
ImportRecord.wOrdinal=IMAGE_ORDINAL(pRecAddr->u1.Ordinal);
}
else if(File.RVA((DWORD)(pRecAddr->u1.AddressOfData))!=NULL)
{
ImportRecord.sApiName=(char*)((IMAGE_IMPORT_BY_NAME*)File.RVA((DWORD)(pRecAddr->u1.AddressOfData)))->Name;
ImportRecord.wOrdinal=0;
}
ImportRecord.dwRecordRVA=dwRecRVA;
AddRecord(ImportRecord);
dwRecRVA+=sizeof(DWORD);
}
dwPosRVA+=sizeof(IMAGE_IMPORT_DESCRIPTOR);
}
}
bool CompareImportsByName(const CImportRecord &Import1,const CImportRecord &Import2)
{
if(_tcsicmp(Import1.sLibName.c_str(),Import2.sLibName.c_str())!=0)
return _tcsicmp(Import1.sLibName.c_str(),Import2.sLibName.c_str())<0;
if(Import1.sApiName!=Import2.sApiName)
return _stricmp(Import1.sApiName.c_str(),Import2.sApiName.c_str())<0;
if(Import1.dwRecordRVA!=Import2.dwRecordRVA)
{
if(Import1.dwRecordRVA==0)
return false;
if(Import2.dwRecordRVA==0)
return true;
return Import1.dwRecordRVA<Import2.dwRecordRVA;
}
return Import1.dwReferenceRVA<Import2.dwReferenceRVA;
}
bool CompareImportsByRecord(const CImportRecord &Import1,const CImportRecord &Import2)
{
if(Import1.dwRecordRVA!=Import2.dwRecordRVA)
return Import1.dwRecordRVA<Import2.dwRecordRVA;
return Import1.dwReferenceRVA<Import2.dwReferenceRVA;
}
bool CompareImportsByReference(const CImportRecord &Import1,const CImportRecord &Import2)
{
return Import1.dwReferenceRVA<Import2.dwReferenceRVA;
}
void CImport::SortRecords(ESortImportType SortType)
{
if(SortType==siByName)
std::sort(Records.begin(),Records.end(),CompareImportsByName);
else if(SortType==siByRecord)
std::sort(Records.begin(),Records.end(),CompareImportsByRecord);
else if(SortType==siByReference)
std::sort(Records.begin(),Records.end(),CompareImportsByReference);
CurrentSort=SortType;
}
void CImport::RedirectToOldIAT(bool fRedirectToEmpty,DWORD *pLibsNumber,DWORD *pDirectRefs)
{
SortRecords(siByName);
int nLib=-1,nApi=-1,nTrampoline=-1;
size_t RecordlessNum=0;
std::map<TSTRING,std::map<WORD,std::vector<size_t>>> Recordless;
CImportRecord LastRecord(_T(""),(WORD)0,0,0,itNone);
for(size_t i=0;i!=Records.size();++i)
{
if(_tcsicmp(Records[i].sLibName.c_str(),LastRecord.sLibName.c_str())==0 &&
Records[i].wOrdinal==LastRecord.wOrdinal)
{
--nApi;
if(Records[i].dwRecordRVA==0)
{
Records[i].dwRecordRVA=LastRecord.dwRecordRVA;
if(Records[i].dwRecordRVA==0)
Recordless[Records[i].sLibName][Records[i].wOrdinal].push_back(i);
}
}
else if(Records[i].dwRecordRVA==0)
{
++RecordlessNum;
Recordless[Records[i].sLibName][Records[i].wOrdinal].push_back(i);
}
if(_tcsicmp(Records[i].sLibName.c_str(),LastRecord.sLibName.c_str())!=0)
{
++nLib;
nApi=-1;
}
++nApi;
if(Records[i].IsDirectRef())
{
++nTrampoline;
for(size_t j=i;j!=0;)
{
--j;
if(_tcsicmp(Records[i].sLibName.c_str(),Records[j].sLibName.c_str())!=0 ||
Records[i].wOrdinal!=Records[j].wOrdinal)
{
break;
}
if(Records[j].IsDirectRef())
{
--nTrampoline;
break;
}
}
}
Records[i].nLib=nLib;
Records[i].nApi=nApi;
Records[i].nTrampoline=nTrampoline;
LastRecord=Records[i];
}
if(pLibsNumber!=NULL)
*pLibsNumber=nLib+1;
if(pDirectRefs!=NULL)
*pDirectRefs=nTrampoline+1;
if(fRedirectToEmpty && RecordlessNum!=0)
{
ESortImportType OldSort=CurrentSort;
SortRecords(siByRecord);
std::map<TSTRING,std::vector<DWORD>> EmptySpaces;
for(size_t i=0;i!=Records.size();++i)
{
if(Records[i].dwRecordRVA==0)
{
LastRecord.dwRecordRVA=0;
continue;
}
if(LastRecord.dwRecordRVA!=0)
{
DWORD dwDiffNum=(Records[i].dwRecordRVA-LastRecord.dwRecordRVA)/sizeof(DWORD_PTR);
if(dwDiffNum>1)
{
DWORD dwSeparator=0;
if(_tcsicmp(Records[i].sLibName.c_str(),LastRecord.sLibName.c_str())!=0)
dwSeparator=1;
bool fBackwards=false;
TSTRING sLibName(LastRecord.sLibName);
for(DWORD j=1;j<dwDiffNum-dwSeparator;)
{
if(EmptySpaces[sLibName].size()==Recordless[sLibName].size())
{
if(dwSeparator==0)
{
if(!fBackwards)
++j;
for(;j+1<dwDiffNum;++j)
{
if(EmptySpaces[_T("")].size()==RecordlessNum*2)
break;
EmptySpaces[_T("")].push_back(LastRecord.dwRecordRVA+j*sizeof(DWORD_PTR));
}
break;
}
else
{
++j;
dwSeparator=0;
sLibName=Records[i].sLibName;
if(EmptySpaces[sLibName].size()==Recordless[sLibName].size())
{
for(;j+1<dwDiffNum;++j)
{
if(EmptySpaces[_T("")].size()==RecordlessNum*2)
break;
EmptySpaces[_T("")].push_back(LastRecord.dwRecordRVA+j*sizeof(DWORD_PTR));
}
break;
}
fBackwards=true;
}
}
if(fBackwards)
{
EmptySpaces[sLibName].push_back(LastRecord.dwRecordRVA+(dwDiffNum-1)*sizeof(DWORD_PTR));
--dwDiffNum;
}
else
{
EmptySpaces[sLibName].push_back(LastRecord.dwRecordRVA+j*sizeof(DWORD_PTR));
++j;
}
}
}
}
LastRecord=Records[i];
}
SortRecords(OldSort);
bool fEnoughSpaces=true;
size_t AnyEmptyNum=0;
for(std::map<TSTRING,std::map<WORD,std::vector<size_t>>>::iterator it_rec(Recordless.begin());it_rec!=Recordless.end();++it_rec)
{
if(it_rec->second.size()>EmptySpaces[it_rec->first].size())
{
size_t NeedSize=it_rec->second.size();
if(AnyEmptyNum!=0 &&
EmptySpaces[_T("")][AnyEmptyNum]-EmptySpaces[_T("")][AnyEmptyNum-1]<2*sizeof(DWORD_PTR))
{
++NeedSize;
}
if(NeedSize>EmptySpaces[it_rec->first].size()+EmptySpaces[_T("")].size()-AnyEmptyNum)
{
fEnoughSpaces=false;
break;
}
else
AnyEmptyNum+=NeedSize-EmptySpaces[it_rec->first].size();
}
}
if(fEnoughSpaces)
{
AnyEmptyNum=0;
for(std::map<TSTRING,std::map<WORD,std::vector<size_t>>>::iterator it_rec(Recordless.begin());it_rec!=Recordless.end();++it_rec)
{
if(AnyEmptyNum!=0 && it_rec->second.size()>EmptySpaces[it_rec->first].size() &&
EmptySpaces[_T("")][AnyEmptyNum]-EmptySpaces[_T("")][AnyEmptyNum-1]<2*sizeof(DWORD_PTR))
{
++AnyEmptyNum;
}
size_t EmptyNum=0;
for(std::map<WORD,std::vector<size_t>>::iterator it_func(it_rec->second.begin());it_func!=it_rec->second.end();++it_func)
{
if(EmptyNum>=EmptySpaces[it_rec->first].size())
{
for(size_t i=0;i!=it_func->second.size();++i)
Records[it_func->second[i]].dwRecordRVA=EmptySpaces[_T("")][AnyEmptyNum];
++AnyEmptyNum;
}
else
{
for(size_t i=0;i!=it_func->second.size();++i)
Records[it_func->second[i]].dwRecordRVA=EmptySpaces[it_rec->first][EmptyNum];
++EmptyNum;
}
}
}
}
}
}
bool CImport::CheckOldIAT(const CPEFile &File,DWORD *pLibsNumber)
{
SortRecords(siByRecord);
int nLib=-1,nApi=-1;
CImportRecord LastRecord(_T(""),(WORD)0,0,0,itNone);
DWORD dwEnd=pMain->pInitData->dwCutModule!=0 ? pMain->pInitData->dwCutModule :
File.pPEHeader->OptionalHeader.SizeOfImage;
for(size_t i=0;i!=Records.size();++i)
{
if(Records[i].dwRecordRVA==0)
return false;
if(Records[i].dwRecordRVA>=dwEnd)
return false;
if(Records[i].dwRecordRVA-LastRecord.dwRecordRVA<2*sizeof(DWORD_PTR) &&
_tcsicmp(Records[i].sLibName.c_str(),LastRecord.sLibName.c_str())!=0)
{
return false;
}
if(Records[i].dwRecordRVA==LastRecord.dwRecordRVA)
--nApi;
else if(Records[i].dwRecordRVA-LastRecord.dwRecordRVA!=sizeof(DWORD_PTR) ||
_tcsicmp(Records[i].sLibName.c_str(),LastRecord.sLibName.c_str())!=0)
{
++nLib;
nApi=-1;
}
++nApi;
Records[i].nLib=nLib;
Records[i].nApi=nApi;
LastRecord=Records[i];
}
if(pLibsNumber!=NULL)
*pLibsNumber=nLib+1;
return true;
}
void CImport::SaveToIAT(CPEFile &File,DWORD dwImportRVA)
{
bool fUseOldIAT=false;
DWORD dwLibsNumber,dwDirectRefs;
RedirectToOldIAT(false,&dwLibsNumber,&dwDirectRefs);
if(CheckOldIAT(File,&dwLibsNumber))
fUseOldIAT=true;
else
RedirectToOldIAT(false,&dwLibsNumber,&dwDirectRefs);
DWORD dwTrampolineSize=pMain->pInitData->fLeaveDirectRefs && dwDirectRefs!=0 ? dwDirectRefs*6 : 0;
DWORD dwTrampolineRVA=File.pPEHeader->OptionalHeader.SizeOfImage;
if(dwTrampolineSize!=0)
{
BYTE *bTrampolineDir=new BYTE[dwTrampolineSize];
memset(bTrampolineDir,0,dwTrampolineSize);
File.CreateSection(".itramp",bTrampolineDir,dwTrampolineSize,IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ | IMAGE_SCN_CNT_INITIALIZED_DATA);
delete[] bTrampolineDir;
}
if(dwImportRVA==0 || File.RVA(dwImportRVA)==NULL)
dwImportRVA=File.pPEHeader->OptionalHeader.SizeOfImage;
std::vector<IMAGE_IMPORT_DESCRIPTOR> ImportEntries;
ImportEntries.resize(dwLibsNumber);
DWORD dwImportSize;
int nLastApi,nLastLib;
for(;;)
{
dwImportSize=sizeof(IMAGE_IMPORT_DESCRIPTOR)*(dwLibsNumber+1);
for(size_t i=0;i!=Records.size();)
{
DWORD dwLookupSize=sizeof(DWORD_PTR);
size_t j=i+1;
for(;j<Records.size();++j)
{
if(Records[j].nLib>Records[i].nLib)
break;
}
if(fUseOldIAT)
{
ImportEntries[Records[i].nLib].OriginalFirstThunk=0;
ImportEntries[Records[i].nLib].FirstThunk=Records[i].dwRecordRVA;
}
else
{
dwLookupSize+=sizeof(DWORD_PTR)*(Records[j-1].nApi+1);
ImportEntries[Records[i].nLib].OriginalFirstThunk=dwImportRVA+dwImportSize;
dwImportSize+=dwLookupSize;
ImportEntries[Records[i].nLib].FirstThunk=dwImportRVA+dwImportSize;
dwImportSize+=dwLookupSize;
}
i=j;
}
nLastApi=-1;
nLastLib=-1;
for(size_t i=0;i!=Records.size();++i)
{
if(Records[i].nLib>nLastLib)
{
ImportEntries[Records[i].nLib].Name=dwImportRVA+dwImportSize;
dwImportSize+=(DWORD)AlignTo(Records[i].sLibName.length()+1,2);
ImportEntries[Records[i].nLib].ForwarderChain=0;
ImportEntries[Records[i].nLib].TimeDateStamp=0;
nLastLib=Records[i].nLib;
nLastApi=-1;
}
if(Records[i].nApi>nLastApi)
{
if(!Records[i].sApiName.empty())
{
Records[i].NameRVA=dwImportRVA+dwImportSize;
dwImportSize+=offsetof(IMAGE_IMPORT_BY_NAME,Name)+(DWORD)AlignTo(Records[i].sApiName.length()+1,2);
}
else
Records[i].NameRVA=Records[i].wOrdinal | IMAGE_ORDINAL_FLAG;
if(fUseOldIAT)
File.SetSectionWritable(Records[i].dwRecordRVA);
nLastApi=Records[i].nApi;
}
}
int n=File.GetSectionNumber(dwImportRVA);
if(dwImportRVA!=File.pPEHeader->OptionalHeader.SizeOfImage && (n==-1 || dwImportRVA-File.pSectionHeader[n].VirtualAddress+dwImportSize>File.pSectionHeader[n].SizeOfRawData))
dwImportRVA=File.pPEHeader->OptionalHeader.SizeOfImage;
else
break;
}
if(dwImportRVA==File.pPEHeader->OptionalHeader.SizeOfImage)
{
BYTE *bImportDir=new BYTE[dwImportSize];
memset(bImportDir,0,dwImportSize);
File.CreateSection(".idata",bImportDir,dwImportSize,IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE | IMAGE_SCN_CNT_INITIALIZED_DATA);
delete[] bImportDir;
}
else
memset(File.RVA(dwImportRVA),0,dwImportSize);
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress=dwImportRVA;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].Size=dwImportSize;
memcpy(File.RVA(dwImportRVA),&ImportEntries[0],sizeof(ImportEntries[0])*ImportEntries.size());
WORD wPrev;
DWORD redir1,dwRVA;
if(!pMain->pInitData->fLeaveDirectRefs && dwDirectRefs!=0)
{
for(DWORD k=0;k!=File.pPEHeader->FileHeader.NumberOfSections;++k)
{
if(pMain->pInitData->dwCutModule!=0 && pMain->pInitData->dwCutModule<=File.pSectionHeader[k].VirtualAddress)
break;
for(int j=2;j<(int)(File.pSectionHeader[k].SizeOfRawData-(sizeof(DWORD)-1));++j)
{
dwRVA=File.pSectionHeader[k].VirtualAddress+j;
BYTE *pFilePtr=File.RVA(dwRVA-2);
if(pFilePtr!=NULL)
wPrev=*(WORD*)pFilePtr;
else
continue;
pFilePtr=File.RVA(dwRVA);
if(pFilePtr!=NULL)
redir1=*(DWORD*)pFilePtr;
else
continue;
DWORD dwDest=0;
if((wPrev>>8)==0xe8 || (wPrev>>8)==0xe9)
dwDest=redir1+sizeof(DWORD)+dwRVA;
#if defined _M_IX86
else if(((wPrev>>8) & 0xf8)==0xb8 || (wPrev>>8)==0x68)
dwDest=redir1-File.pPEHeader->OptionalHeader.ImageBase;
#endif
if(dwDest!=0)
{
for(size_t i=0;i!=Records.size();++i)
{
if(!Records[i].IsDirectRef())
continue;
if(Records[i].dwReferenceRVA-2==dwDest-1)
{
++Records[i].dwReferenceRVA;
j+=sizeof(DWORD)-1;
break;
}
}
}
}
}
ESortImportType OldSort=CurrentSort;
SortRecords(siByReference);
for(size_t i=1;i<Records.size();++i)
{
if(!Records[i].IsDirectRef())
continue;
if(Records[i].dwReferenceRVA-2==Records[i-1].dwReferenceRVA+sizeof(DWORD)-1)
++Records[i].dwReferenceRVA;
}
SortRecords(OldSort);
}
nLastApi=-1;
nLastLib=-1;
for(size_t i=0;i!=Records.size();++i)
{
if(Records[i].nLib>nLastLib)
{
if(File.RVA(ImportEntries[Records[i].nLib].Name)!=NULL)
{
#ifdef UNICODE
int nWideLength=(int)Records[i].sLibName.length()+1;
WideCharToMultiByte(CP_ACP,0,Records[i].sLibName.c_str(),nWideLength,
(char*)File.RVA(ImportEntries[Records[i].nLib].Name),nWideLength,NULL,NULL);
#else
strcpy_s((char*)File.RVA(ImportEntries[Records[i].nLib].Name),Records[i].sLibName.length()+1,Records[i].sLibName.c_str());
#endif
}
nLastLib=Records[i].nLib;
nLastApi=-1;
}
if(Records[i].nApi>nLastApi)
{
if(!Records[i].sApiName.empty() && File.RVA((DWORD)(Records[i].NameRVA+offsetof(IMAGE_IMPORT_BY_NAME,Name)))!=NULL)
strcpy_s((char*)File.RVA((DWORD)(Records[i].NameRVA+offsetof(IMAGE_IMPORT_BY_NAME,Name))),Records[i].sApiName.length()+1,Records[i].sApiName.c_str());
if(!fUseOldIAT && File.RVA(ImportEntries[Records[i].nLib].OriginalFirstThunk+Records[i].nApi*sizeof(DWORD_PTR))!=NULL)
*(DWORD_PTR*)File.RVA(ImportEntries[Records[i].nLib].OriginalFirstThunk+Records[i].nApi*sizeof(DWORD_PTR))=Records[i].NameRVA;
if(File.RVA(ImportEntries[Records[i].nLib].FirstThunk+Records[i].nApi*sizeof(DWORD_PTR))!=NULL)
*(DWORD_PTR*)File.RVA(ImportEntries[Records[i].nLib].FirstThunk+Records[i].nApi*sizeof(DWORD_PTR))=Records[i].NameRVA;
if(File.RVA(ImportEntries[Records[i].nLib].FirstThunk+Records[i].nApi*sizeof(DWORD_PTR)+sizeof(DWORD_PTR))!=NULL)
*(DWORD_PTR*)File.RVA(ImportEntries[Records[i].nLib].FirstThunk+Records[i].nApi*sizeof(DWORD_PTR)+sizeof(DWORD_PTR))=0;
nLastApi=Records[i].nApi;
}
dwRVA=Records[i].dwReferenceRVA;
if(dwRVA!=0 && File.RVA(dwRVA)!=NULL && File.RVA(dwRVA-2)!=NULL)
{
if(Records[i].Type==itIndirectJmp)
*(WORD*)File.RVA(dwRVA-2)=0x25ff;
else if(Records[i].Type==itDirectJmp && dwTrampolineSize==0)
*(WORD*)File.RVA(dwRVA-2)=0x25ff;
else if(Records[i].Type==itIndirectCall)
*(WORD*)File.RVA(dwRVA-2)=0x15ff;
else if(Records[i].Type==itDirectCall && dwTrampolineSize==0)
*(WORD*)File.RVA(dwRVA-2)=0x15ff;
#if defined _M_IX86
else if(Records[i].Type==itDirectOther && dwTrampolineSize==0)
{
wPrev=*(BYTE*)File.RVA(dwRVA-1);
if(wPrev==0x68 && File.RVA(dwRVA+4)!=NULL)
{
wPrev=*(BYTE*)File.RVA(dwRVA+4);
if(wPrev==0xc3)
*(WORD*)File.RVA(dwRVA-2)=0x25ff;
else
*(WORD*)File.RVA(dwRVA-2)=0x35ff;
}
else if(wPrev==0xb8)
*(WORD*)File.RVA(dwRVA-2)=0x058b;
else if(wPrev==0xb9)
*(WORD*)File.RVA(dwRVA-2)=0x0d8b;
else if(wPrev==0xba)
*(WORD*)File.RVA(dwRVA-2)=0x158b;
else if(wPrev==0xbb)
*(WORD*)File.RVA(dwRVA-2)=0x1d8b;
else if(wPrev==0xbc)
*(WORD*)File.RVA(dwRVA-2)=0x258b;
else if(wPrev==0xbd)
*(WORD*)File.RVA(dwRVA-2)=0x2d8b;
else if(wPrev==0xbe)
*(WORD*)File.RVA(dwRVA-2)=0x358b;
else if(wPrev==0xbf)
*(WORD*)File.RVA(dwRVA-2)=0x3d8b;
}
#endif
if(!fUseOldIAT || Records[i].IsDirectRef())
{
if(dwTrampolineSize!=0 && Records[i].IsDirectRef())
{
if(Records[i].Type==itDirectJmp || Records[i].Type==itDirectCall)
*(DWORD*)File.RVA(dwRVA-1)=dwTrampolineRVA+Records[i].nTrampoline*6-sizeof(DWORD)-dwRVA+1;
else if(Records[i].Type==itDirectOther)
{
#if defined _M_AMD64
*(DWORD*)File.RVA(dwRVA-1)=dwTrampolineRVA+Records[i].nTrampoline*6-sizeof(DWORD)-dwRVA+1;
#elif defined _M_IX86
*(DWORD*)File.RVA(dwRVA-1)=File.pPEHeader->OptionalHeader.ImageBase+dwTrampolineRVA+Records[i].nTrampoline*6;
#else
!!!
#endif
}
dwRVA=dwTrampolineRVA+Records[i].nTrampoline*6+2;
*(WORD*)File.RVA(dwRVA-2)=0x25ff;
}
#if defined _M_AMD64
*(DWORD*)File.RVA(dwRVA)=ImportEntries[Records[i].nLib].FirstThunk+Records[i].nApi*sizeof(DWORD_PTR)-sizeof(DWORD)-dwRVA;
#elif defined _M_IX86
*(DWORD*)File.RVA(dwRVA)=File.pPEHeader->OptionalHeader.ImageBase+ImportEntries[Records[i].nLib].FirstThunk+
Records[i].nApi*sizeof(DWORD_PTR);
if(pMain->pInitData->fIsDll && pMain->pInitData->fRelocs)
pMain->FixUp.AddItem(dwRVA,IMAGE_REL_BASED_HIGHLOW);
#else
!!!
#endif
}
}
}
}
void CImport::SaveToFile(CPEFile &File,DWORD dwImportRVA)
{
if(File.IsEmpty())
return;
if(Records.empty())
{
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress=0;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].Size=0;
return;
}
SaveToIAT(File,dwImportRVA);
}
void CFixUp::Clear()
{
Items.clear();
}
int CFixUp::Compare(DWORD dwRVA) const
{
for(size_t i=0;i!=Items.size();++i)
{
if(Items[i].dwRVA==dwRVA)
return (int)i;
}
return -1;
}
void CFixUp::AddItem(DWORD dwRVA,DWORD dwType)
{
if(Compare(dwRVA)!=-1)
return;
RELOCATION Item;
Item.dwRVA=dwRVA;
Item.dwType=dwType;
Items.push_back(Item);
}
void CFixUp::ReadFromFile(const CPEFile &File)
{
Clear();
DWORD dwPosRVA=File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress;
while(dwPosRVA<File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress+
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size)
{
IMAGE_BASE_RELOCATION *pRelocs=(IMAGE_BASE_RELOCATION*)File.RVA(dwPosRVA);
if(pRelocs==NULL)
return;
int nItemsNumber=(pRelocs->SizeOfBlock-sizeof(IMAGE_BASE_RELOCATION))/sizeof(WORD);
for(int i=0;i<nItemsNumber;++i)
{
if(File.RVA(dwPosRVA+sizeof(IMAGE_BASE_RELOCATION)+i*sizeof(WORD))==NULL)
continue;
DWORD dwRVA=pRelocs->VirtualAddress+*(WORD*)File.RVA(dwPosRVA+sizeof(IMAGE_BASE_RELOCATION)+i*sizeof(WORD)) & 0x0fff;
DWORD dwType=(*(WORD*)File.RVA(dwPosRVA+sizeof(IMAGE_BASE_RELOCATION)+i*sizeof(WORD)) & 0xf000)>>12;
if(dwType!=IMAGE_REL_BASED_ABSOLUTE)
AddItem(dwRVA,dwType);
}
dwPosRVA+=pRelocs->SizeOfBlock;
}
}
bool CompareRelocs(const CFixUp::RELOCATION &Reloc1,const CFixUp::RELOCATION &Reloc2)
{
return Reloc1.dwRVA<Reloc2.dwRVA;
}
void CFixUp::SaveToFile(CPEFile &File)
{
if(File.IsEmpty())
return;
if(Items.empty())
{
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress=0;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size=0;
return;
}
std::sort(Items.begin(),Items.end(),CompareRelocs);
BYTE *bRelocSection=new BYTE[Items.size()*sizeof(DWORD)];
memset(bRelocSection,0,Items.size()*sizeof(DWORD));
BYTE *bRelocPosition=bRelocSection;
for(size_t i=0;i!=Items.size();)
{
IMAGE_BASE_RELOCATION *pRelocs=(IMAGE_BASE_RELOCATION*)bRelocPosition;
bRelocPosition+=sizeof(IMAGE_BASE_RELOCATION);
pRelocs->VirtualAddress=Items[i].dwRVA & ~(PAGE_SIZE-1);
for(;i!=Items.size() && pRelocs->VirtualAddress==(Items[i].dwRVA & ~(PAGE_SIZE-1));++i)
{
*(WORD*)(bRelocPosition)=(WORD)((Items[i].dwType << 12) | (Items[i].dwRVA & (PAGE_SIZE-1)));
bRelocPosition+=sizeof(WORD);
}
if((((DWORD)(bRelocPosition-bRelocSection)) % 4)!=0)
bRelocPosition+=sizeof(WORD);
pRelocs->SizeOfBlock=(DWORD)(bRelocPosition-(BYTE*)pRelocs);
}
DWORD dwRVA,dwSize=(DWORD)(bRelocPosition-bRelocSection);
dwRVA=File.pPEHeader->OptionalHeader.SizeOfImage;
File.CreateSection(".reloc",bRelocSection,dwSize,IMAGE_SCN_MEM_READ | IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_DISCARDABLE);
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress=dwRVA;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].Size=dwSize;
delete[] bRelocSection;
}
void CFixUp::ProcessToFile(CPEFile &File,DWORD dwDelta) const
{
for(size_t i=0;i<Items.size();++i)
{
switch(Items[i].dwType)
{
case IMAGE_REL_BASED_HIGH:
*(WORD*)(File.RVA(Items[i].dwRVA))=*(WORD*)(File.RVA(Items[i].dwRVA))+HIWORD(dwDelta);
break;
case IMAGE_REL_BASED_LOW:
*(WORD*)(File.RVA(Items[i].dwRVA))=*(WORD*)(File.RVA(Items[i].dwRVA))+LOWORD(dwDelta);
break;
case IMAGE_REL_BASED_HIGHLOW:
*(DWORD*)(File.RVA(Items[i].dwRVA))+=dwDelta;
break;
case IMAGE_REL_BASED_HIGHADJ:
*(DWORD*)(File.RVA((Items[i].dwRVA << 16)+Items[i+1].dwRVA))+=dwDelta;
++i;
break;
case IMAGE_REL_BASED_DIR64:
*(DWORD64*)(File.RVA(Items[i].dwRVA))+=dwDelta;
break;
case IMAGE_REL_BASED_MIPS_JMPADDR:
{
DWORD dwReloc=*(DWORD*)(File.RVA(Items[i].dwRVA));
*(DWORD*)(File.RVA(Items[i].dwRVA))=(((((dwReloc & 0x3ffffff)<<2)+dwDelta)>>2) & 0x3ffffff)+(dwReloc & ~0x3ffffff);
break;
}
case IMAGE_REL_BASED_IA64_IMM64:
default:
MessageBox(NULL,_T("Unimplemented relocation type"),_T("QUnpack"),MB_OK);
break;
}
}
}
void CTLS::Clear()
{
bTLSSection.clear();
}
void CTLS::ReadFromFile(const CPEFile &File)
{
Clear();
IMAGE_TLS_DIRECTORY *pTLSDirectory=(IMAGE_TLS_DIRECTORY*)File.RVA(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress);
if(pTLSDirectory==NULL)
return;
int nSize=0;
BYTE *bCallbacks,*bTmp;
bCallbacks=File.RVA((DWORD)(pTLSDirectory->AddressOfCallBacks-File.pPEHeader->OptionalHeader.ImageBase));
if(pTLSDirectory->AddressOfCallBacks!=0 && bCallbacks!=NULL)
{
while(*(DWORD_PTR*)(bCallbacks+nSize)!=0)
nSize+=sizeof(DWORD_PTR);
nSize+=sizeof(DWORD_PTR);
}
else
pTLSDirectory->AddressOfCallBacks=0;
bTLSSection.resize(nSize+sizeof(IMAGE_TLS_DIRECTORY)+pTLSDirectory->EndAddressOfRawData-pTLSDirectory->StartAddressOfRawData+sizeof(DWORD_PTR));
memcpy(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR),bCallbacks,nSize);
bTmp=File.RVA((DWORD)(pTLSDirectory->StartAddressOfRawData-File.pPEHeader->OptionalHeader.ImageBase));
if(bTmp!=NULL && pTLSDirectory->StartAddressOfRawData!=0)
memcpy(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR)+nSize,bTmp,
pTLSDirectory->EndAddressOfRawData-pTLSDirectory->StartAddressOfRawData);
else
memset(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR)+nSize,0,
pTLSDirectory->EndAddressOfRawData-pTLSDirectory->StartAddressOfRawData);
bTmp=File.RVA((DWORD)(pTLSDirectory->AddressOfIndex-File.pPEHeader->OptionalHeader.ImageBase));
if(bTmp!=NULL && pTLSDirectory->AddressOfIndex!=0)
memcpy(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY),bTmp,sizeof(DWORD_PTR));
else
memset(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY),0,sizeof(DWORD_PTR));
memcpy(&bTLSSection[0],pTLSDirectory,sizeof(IMAGE_TLS_DIRECTORY));
}
void CTLS::SaveToFile(CPEFile &File,bool fSaveCallbacks) const
{
if(File.IsEmpty())
return;
if(bTLSSection.empty())
{
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress=0;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].Size=0;
return;
}
DWORD dwRVA=File.pPEHeader->OptionalHeader.SizeOfImage;
File.CreateSection(".tls",&bTLSSection[0],(DWORD)bTLSSection.size(),IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE | IMAGE_SCN_CNT_INITIALIZED_DATA);
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress=dwRVA;
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].Size=(DWORD)bTLSSection.size();
IMAGE_TLS_DIRECTORY *pTLSDirectory=(IMAGE_TLS_DIRECTORY*)File.RVA(dwRVA);
pTLSDirectory->AddressOfIndex=File.pPEHeader->OptionalHeader.ImageBase+dwRVA+sizeof(IMAGE_TLS_DIRECTORY);
if(fSaveCallbacks && pTLSDirectory->AddressOfCallBacks!=0)
pTLSDirectory->AddressOfCallBacks=File.pPEHeader->OptionalHeader.ImageBase+dwRVA+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR);
else
pTLSDirectory->AddressOfCallBacks=0;
pTLSDirectory->StartAddressOfRawData=File.pPEHeader->OptionalHeader.ImageBase+dwRVA+bTLSSection.size()+
((IMAGE_TLS_DIRECTORY*)&bTLSSection[0])->StartAddressOfRawData-((IMAGE_TLS_DIRECTORY*)&bTLSSection[0])->EndAddressOfRawData;
pTLSDirectory->EndAddressOfRawData=File.pPEHeader->OptionalHeader.ImageBase+dwRVA+bTLSSection.size();
if(pMain->pInitData->fRelocs)
{
#if defined _M_AMD64
DWORD dwType=IMAGE_REL_BASED_DIR64;
#elif defined _M_IX86
DWORD dwType=IMAGE_REL_BASED_HIGHLOW;
#else
!!!
#endif
if(pTLSDirectory->StartAddressOfRawData!=0)
pMain->FixUp.AddItem(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress+offsetof(IMAGE_TLS_DIRECTORY,StartAddressOfRawData),dwType);
if(pTLSDirectory->EndAddressOfRawData!=0)
pMain->FixUp.AddItem(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress+offsetof(IMAGE_TLS_DIRECTORY,EndAddressOfRawData),dwType);
if(pTLSDirectory->AddressOfIndex!=0)
pMain->FixUp.AddItem(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress+offsetof(IMAGE_TLS_DIRECTORY,AddressOfIndex),dwType);
if(pTLSDirectory->AddressOfCallBacks!=0)
{
pMain->FixUp.AddItem(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress+offsetof(IMAGE_TLS_DIRECTORY,AddressOfCallBacks),dwType);
int i=0;
while(*(DWORD_PTR*)(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR))!=0)
{
pMain->FixUp.AddItem((DWORD)(pTLSDirectory->AddressOfCallBacks-File.pPEHeader->OptionalHeader.ImageBase+i),dwType);
i+=sizeof(DWORD_PTR);
}
}
}
}
DWORD_PTR CTLS::GetFirstCallback() const
{
if(!bTLSSection.empty())
{
IMAGE_TLS_DIRECTORY *pTLSDirectory=(IMAGE_TLS_DIRECTORY*)&bTLSSection[0];
if(pTLSDirectory->AddressOfCallBacks!=0)
return *(DWORD_PTR*)(&bTLSSection[0]+sizeof(IMAGE_TLS_DIRECTORY)+sizeof(DWORD_PTR));
}
return 0;
}
void CExport::Clear()
{
sExportName.clear();
Exports.clear();
}
void CExport::ReadFromFile(const CPEFile &File)
{
Clear();
if(File.RVA(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress)==NULL)
return;
ExpHeader=*(IMAGE_EXPORT_DIRECTORY*)File.RVA(File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
if(ExpHeader.NumberOfFunctions==0)
return;
Exports.resize(ExpHeader.NumberOfFunctions);
if(File.RVA(ExpHeader.Name)!=NULL)
sExportName=(char*)File.RVA(ExpHeader.Name);
for(DWORD i=0;i!=Exports.size();++i)
{
if(File.RVA(ExpHeader.AddressOfFunctions+i*sizeof(DWORD))!=NULL)
Exports[i].dwFuncAddress=*(DWORD*)File.RVA(ExpHeader.AddressOfFunctions+i*sizeof(DWORD));
else
Exports[i].dwFuncAddress=0;
Exports[i].sFuncName.clear();
Exports[i].wFuncOrdinal=(WORD)(ExpHeader.Base+i);
for(DWORD j=0;j!=ExpHeader.NumberOfNames;++j)
{
if(File.RVA(ExpHeader.AddressOfNameOrdinals+j*sizeof(WORD))!=NULL &&
*(WORD*)File.RVA(ExpHeader.AddressOfNameOrdinals+j*sizeof(WORD))==i)
{
if(File.RVA(ExpHeader.AddressOfNames+j*sizeof(DWORD))!=NULL &&
File.RVA(*(DWORD*)File.RVA(ExpHeader.AddressOfNames+j*sizeof(DWORD)))!=NULL)
Exports[i].sFuncName=(char*)File.RVA(*(DWORD*)File.RVA(ExpHeader.AddressOfNames+j*sizeof(DWORD)));
break;
}
}
if(Exports[i].dwFuncAddress>File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress &&
Exports[i].dwFuncAddress<File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress+
File.pPEHeader->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size)
{
if(File.RVA(Exports[i].dwFuncAddress)!=NULL)
Exports[i].sForwardedName=(char*)File.RVA(Exports[i].dwFuncAddress);
Exports[i].dwFuncAddress=0;
}
}
}
bool CompareExports(const CExport::CExportFunc &Export1,const CExport::CExportFunc &Export2)
{
if(Export1.sFuncName!=Export2.sFuncName)
return Export1.sFuncName<Export2.sFuncName;
if(Export1.sForwardedName!=Export2.sForwardedName)
return Export1.sForwardedName<Export2.sForwardedName;
return Export1.dwFuncAddress<Export2.dwFuncAddress;
}
void CExport::SaveToFile(CPEFile &File)
{
if(File.IsEmpty())
return;
if(Exports.empty())