bool DllLoader::Load()
{
if (!Parse())
{
CLog::Log(LOGERROR, "Unable to open dll %s", GetFileName());
return false;
}
ResolveImports();
LoadSymbols();
// only execute DllMain if no EntryPoint is found
if (!EntryAddress)
ResolveExport("DllMain", (void**)&EntryAddress);
#ifdef LOGALL
CLog::Log(LOGDEBUG, "Executing EntryPoint with DLL_PROCESS_ATTACH at: 0x%x - Dll: %s", pLoader->EntryAddress, sName);
#endif
if(EntryAddress)
{
EntryFunc initdll = (EntryFunc)EntryAddress;
/* since we are handing execution over to unknown code, safeguard here */
try
{
#ifdef TARGET_POSIX
extend_stack_for_dll_alloca();
#endif
initdll((HINSTANCE)hModule, DLL_PROCESS_ATTACH , 0); //call "DllMain" with DLL_PROCESS_ATTACH
#ifdef LOGALL
CLog::Log(LOGDEBUG, "EntryPoint with DLL_PROCESS_ATTACH called - Dll: %s", sName);
#endif
}
XBMCCOMMONS_HANDLE_UNCHECKED
catch(...)
{
CLog::Log(LOGERROR, "%s - Unhandled exception during DLL_PROCESS_ATTACH", __FUNCTION__);
// vp7vfw.dll throws a CUserException due to a missing export
// but the export isn't really needed for normal operation
// and dll works anyway, so let's ignore it
if(stricmp(GetName(), "vp7vfw.dll") != 0)
return false;
CLog::Log(LOGDEBUG, "%s - Ignoring exception during DLL_PROCESS_ATTACH", __FUNCTION__);
}
// init function may have fixed up the export table
// this is what I expect should happens on PECompact2
// dll's if export table is compressed.
if(!m_pExportHead)
LoadExports();
}
return true;
}
/* Called if the library is loaded or freed.
* NOTE: if a thread attaches a DLL, the current thread will only do
* DLL_PROCESS_ATTACH. Only new created threads do DLL_THREAD_ATTACH
* (SDK)
*/
WIN_BOOL
PE_InitDLL (WINE_MODREF * wm, DWORD type, LPVOID lpReserved)
{
WIN_BOOL retv = TRUE;
assert (wm->type == MODULE32_PE);
if ((PE_HEADER (wm->module)->FileHeader.Characteristics & IMAGE_FILE_DLL) &&
(PE_HEADER (wm->module)->OptionalHeader.AddressOfEntryPoint)
) {
DLLENTRYPROC entry;
entry = (void *) PE_FindExportedFunction (wm, "DllMain", 0);
if (entry == NULL) {
TRACE ("no DllMain, check optional\n");
entry = (void *) RVA_PTR (wm->module, OptionalHeader.AddressOfEntryPoint);
// FIXME: how can we be sure that is is valid?
//return 1;
}
TRACE_ (relay) ("CallTo32(entryproc=%p,module=%08x,type=%ld,res=%p)\n",
entry, wm->module, type, lpReserved);
switch (type) {
case DLL_PROCESS_DETACH:
TRACE ("Entering DllMain(DLL_PROCESS_DETACH) for %s\n", wm->filename);
break;
case DLL_PROCESS_ATTACH:
TRACE ("Entering DllMain(DLL_PROCESS_ATTACH) for %s\n", wm->filename);
break;
case DLL_THREAD_DETACH:
TRACE ("Entering DllMain(DLL_THREAD_DETACH) for %s\n", wm->filename);
break;
case DLL_THREAD_ATTACH:
TRACE ("Entering DllMain(DLL_THREAD_ATTACH) for %s\n", wm->filename);
break;
}
extend_stack_for_dll_alloca ();
retv = entry (wm->module, type, lpReserved);
}
TRACE ("retv=%d\n", retv);
return retv;
}
bool DllLoader::Load()
{
if (!Parse())
{
CLog::Log(LOGERROR, "Unable to open dll %s", GetFileName());
return false;
}
ResolveImports();
LoadSymbols();
// only execute DllMain if no EntryPoint is found
if (!EntryAddress)
ResolveExport("DllMain", (void**)&EntryAddress);
// patch some unwanted calls in memory
if (strstr(GetName(), "QuickTime.qts"))
{
int i;
uintptr_t dispatch_addr;
uintptr_t imagebase_addr;
uintptr_t dispatch_rva;
ResolveExport("theQuickTimeDispatcher", (void **)&dispatch_addr);
imagebase_addr = (uintptr_t)hModule;
CLog::Log(LOGDEBUG,
"Virtual Address of theQuickTimeDispatcher = %p",
(void *)dispatch_addr);
CLog::Log(LOGDEBUG, "ImageBase of %s = %p",
GetName(), (void *)imagebase_addr);
dispatch_rva = dispatch_addr - imagebase_addr;
CLog::Log(LOGDEBUG,
"Relative Virtual Address of theQuickTimeDispatcher = %p",
(void *)dispatch_rva);
uintptr_t base = imagebase_addr;
if (dispatch_rva == 0x124C30)
{
CLog::Log(LOGINFO, "QuickTime5 DLLs found\n");
for (i = 0;i < 5;i++) ((BYTE*)base + 0x19e842)[i] = 0x90; // make_new_region ?
for (i = 0;i < 28;i++) ((BYTE*)base + 0x19e86d)[i] = 0x90; // call__call_CreateCompatibleDC ?
for (i = 0;i < 5;i++) ((BYTE*)base + 0x19e898)[i] = 0x90; // jmp_to_call_loadbitmap ?
for (i = 0;i < 9;i++) ((BYTE*)base + 0x19e8ac)[i] = 0x90; // call__calls_OLE_shit ?
for (i = 0;i < 106;i++) ((BYTE*)base + 0x261B10)[i] = 0x90; // disable threads
}
else if (dispatch_rva == 0x13B330)
{
CLog::Log(LOGINFO, "QuickTime6 DLLs found\n");
for (i = 0;i < 5;i++) ((BYTE*)base + 0x2730CC)[i] = 0x90; // make_new_region
for (i = 0;i < 28;i++) ((BYTE*)base + 0x2730f7)[i] = 0x90; // call__call_CreateCompatibleDC
for (i = 0;i < 5;i++) ((BYTE*)base + 0x273122)[i] = 0x90; // jmp_to_call_loadbitmap
for (i = 0;i < 9;i++) ((BYTE*)base + 0x273131)[i] = 0x90; // call__calls_OLE_shit
for (i = 0;i < 96;i++) ((BYTE*)base + 0x2AC852)[i] = 0x90; // disable threads
}
else if (dispatch_rva == 0x13C3E0)
{
CLog::Log(LOGINFO, "QuickTime6.3 DLLs found\n");
for (i = 0;i < 5;i++) ((BYTE*)base + 0x268F6C)[i] = 0x90; // make_new_region
for (i = 0;i < 28;i++) ((BYTE*)base + 0x268F97)[i] = 0x90; // call__call_CreateCompatibleDC
for (i = 0;i < 5;i++) ((BYTE*)base + 0x268FC2)[i] = 0x90; // jmp_to_call_loadbitmap
for (i = 0;i < 9;i++) ((BYTE*)base + 0x268FD1)[i] = 0x90; // call__calls_OLE_shit
for (i = 0;i < 96;i++) ((BYTE*)base + 0x2B4722)[i] = 0x90; // disable threads
}
else
{
CLog::Log(LOGERROR, "Unsupported QuickTime version");
}
CLog::Log(LOGINFO, "QuickTime.qts patched!!!\n");
}
#ifdef LOGALL
CLog::Log(LOGDEBUG, "Executing EntryPoint with DLL_PROCESS_ATTACH at: 0x%x - Dll: %s", pLoader->EntryAddress, sName);
#endif
if(EntryAddress)
{
EntryFunc initdll = (EntryFunc)EntryAddress;
/* since we are handing execution over to unknown code, safeguard here */
try
{
#ifdef TARGET_POSIX
extend_stack_for_dll_alloca();
#endif
initdll((HINSTANCE)hModule, DLL_PROCESS_ATTACH , 0); //call "DllMain" with DLL_PROCESS_ATTACH
#ifdef LOGALL
CLog::Log(LOGDEBUG, "EntryPoint with DLL_PROCESS_ATTACH called - Dll: %s", sName);
#endif
}
XBMCCOMMONS_HANDLE_UNCHECKED
catch(...)
{
CLog::Log(LOGERROR, "%s - Unhandled exception during DLL_PROCESS_ATTACH", __FUNCTION__);
// vp7vfw.dll throws a CUserException due to a missing export
// but the export isn't really needed for normal operation
// and dll works anyway, so let's ignore it
if(stricmp(GetName(), "vp7vfw.dll") != 0)
return false;
CLog::Log(LOGDEBUG, "%s - Ignoring exception during DLL_PROCESS_ATTACH", __FUNCTION__);
}
// init function may have fixed up the export table
// this is what I expect should happens on PECompact2
// dll's if export table is compressed.
if(!m_pExportHead)
LoadExports();
}
return true;
}
