static HMODULE WINAPI
MyLoadLibraryA(LPCSTR lpLibFileName)
{
HMODULE hModule = LoadLibraryA(lpLibFileName);
DWORD dwLastError = GetLastError();
if (VERBOSITY >= 2) {
debugPrintf("inject: intercepting %s(\"%s\") = 0x%p\n",
__FUNCTION__ + 2, lpLibFileName, hModule);
}
if (VERBOSITY > 0) {
const char *szBaseName = getBaseName(lpLibFileName);
if (isMatchModuleName(szBaseName)) {
if (VERBOSITY < 2) {
debugPrintf("inject: intercepting %s(\"%s\")\n", __FUNCTION__, lpLibFileName);
}
#ifdef __GNUC__
void *caller = __builtin_return_address (0);
HMODULE hModule = 0;
BOOL bRet = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
(LPCTSTR)caller,
&hModule);
assert(bRet);
char szCaller[MAX_PATH];
DWORD dwRet = GetModuleFileNameA(hModule, szCaller, sizeof szCaller);
assert(dwRet);
debugPrintf("inject: called from %s\n", szCaller);
#endif
}
}
// Hook all new modules (and not just this one, to pick up any dependencies)
patchAllModules(ACTION_HOOK);
SetLastError(dwLastError);
return hModule;
}
static void
patchModule(HMODULE hModule,
const char *szModule,
Action action)
{
/* Never patch this module */
if (hModule == g_hThisModule) {
return;
}
/* Never patch our hook module */
if (hModule == g_hHookModule) {
return;
}
/* Hook modules only once */
if (action == ACTION_HOOK) {
std::pair< std::set<HMODULE>::iterator, bool > ret;
EnterCriticalSection(&Mutex);
ret = g_hHookedModules.insert(hModule);
LeaveCriticalSection(&Mutex);
if (!ret.second) {
return;
}
}
const char *szBaseName = getBaseName(szModule);
/* Don't hook our replacement modules to avoid tracing internal APIs */
/* XXX: is this really a good idea? */
if (isMatchModuleName(szBaseName)) {
return;
}
/* Leave these modules alone */
if (stricmp(szBaseName, "kernel32.dll") == 0 ||
stricmp(szBaseName, "ConEmuHk.dll") == 0) {
return;
}
if (VERBOSITY > 0) {
debugPrintf("inject: found module %s\n", szModule);
}
PIMAGE_IMPORT_DESCRIPTOR pImportDescriptor = getFirstImportDescriptor(hModule, szModule);
if (pImportDescriptor) {
while (pImportDescriptor->FirstThunk) {
patchDescriptor(hModule, szModule, pImportDescriptor, action);
++pImportDescriptor;
}
}
PImgDelayDescr pDelayDescriptor = getDelayImportDescriptor(hModule, szModule);
if (pDelayDescriptor) {
while (pDelayDescriptor->rvaDLLName) {
if (VERBOSITY > 1) {
const char* szName = getDescriptorName(hModule, pDelayDescriptor);
debugPrintf("inject: found %sdelay-load import entry for module %s\n",
pDelayDescriptor->grAttrs & dlattrRva ? "" : "old-style ",
szName);
}
patchDescriptor(hModule, szModule, pDelayDescriptor, action);
++pDelayDescriptor;
}
}
}
static void
patchModule(HMODULE hModule,
const char *szModule,
Action action)
{
/* Never patch this module */
if (hModule == g_hThisModule) {
return;
}
/* Never patch our hook module */
if (hModule == g_hHookModule) {
return;
}
/* Hook modules only once */
if (action == ACTION_HOOK) {
std::pair< std::set<HMODULE>::iterator, bool > ret;
EnterCriticalSection(&g_Mutex);
ret = g_hHookedModules.insert(hModule);
LeaveCriticalSection(&g_Mutex);
if (!ret.second) {
return;
}
}
const char *szBaseName = getBaseName(szModule);
/* Don't hook our replacement modules to avoid tracing internal APIs */
/* XXX: is this really a good idea? */
if (isMatchModuleName(szBaseName)) {
return;
}
/* Leave these modules alone.
*
* Hooking other injection DLLs easily leads to infinite recursion (and
* stack overflow), especially when those libraries use techniques like
* modifying the hooked functions prolog (instead of patching IAT like we
* do).
*
* See also:
* - http://www.nynaeve.net/?p=62
*/
if (stricmp(szBaseName, "kernel32.dll") == 0 ||
stricmp(szBaseName, "AcLayers.dll") == 0 ||
stricmp(szBaseName, "ConEmuHk.dll") == 0 ||
stricmp(szBaseName, "gameoverlayrenderer.dll") == 0 ||
stricmp(szBaseName, "gameoverlayrenderer64.dll") == 0) {
return;
}
if (VERBOSITY > 0) {
debugPrintf("inject: found module %s\n", szModule);
}
PIMAGE_IMPORT_DESCRIPTOR pImportDescriptor = getFirstImportDescriptor(hModule, szModule);
if (pImportDescriptor) {
while (pImportDescriptor->FirstThunk) {
patchDescriptor(hModule, szModule, pImportDescriptor, action);
++pImportDescriptor;
}
}
PImgDelayDescr pDelayDescriptor = getDelayImportDescriptor(hModule, szModule);
if (pDelayDescriptor) {
while (pDelayDescriptor->rvaDLLName) {
if (VERBOSITY > 1) {
const char* szName = getDescriptorName(hModule, pDelayDescriptor);
debugPrintf("inject: found %sdelay-load import entry for module %s\n",
pDelayDescriptor->grAttrs & dlattrRva ? "" : "old-style ",
szName);
}
patchDescriptor(hModule, szModule, pDelayDescriptor, action);
++pDelayDescriptor;
}
}
}
