int hackpoints_error_function_not_found(const char *func_name, int retval)
{
log_printf("ERROR: function '%s' not found! "
#ifdef _DEBUG
"(implementation not exported or still missing?)"
#else
"(outdated or corrupt %s installation, maybe?)"
#endif
"\n", func_name, PROJECT_NAME_SHORT()
);
return retval;
}
int WaitUntilEntryPoint(HANDLE hProcess, HANDLE hThread, const char *module)
{
// Try to get the entry point by various means, sorted by both efficiency
// and probability of them working.
void *entry_addr = NULL;
/**
* Method 1: Initial value of EAX
* After creating a process in suspended state, EAX is guaranteed to contain
* the correct address of the entry point, even when the executable has the
* DYNAMICBASE flag activated in its header.
*
* (Works on Windows, but not on Wine)
*/
if(!(entry_addr = entry_from_context(hThread))) {
HMODULE module_base;
/**
* Method 2: EnumProcessModules, then parse the PE header.
*
* (Works on Wine, but not on Windows immediately after the target process
* was created in suspended state.)
*/
if(!(module_base = GetRemoteModuleHandle(hProcess, module))) {
/**
* Method 3: Guessing 0x400000
* This is the default value in many compilers and should thus work for
* most non-ASLR Windows applications.
*/
module_base = (HMODULE)0x400000;
}
entry_addr = GetRemoteModuleEntryPoint(hProcess, module_base);
}
if(entry_addr) {
return ThreadWaitUntil(hProcess, hThread, entry_addr);
} else {
log_mboxf(NULL, MB_OK | MB_ICONEXCLAMATION,
"Couldn't determine the entry point of %s!\n"
"\n"
"Seems as if %s won't work with this game on your system.\n",
PathFindFileNameA(module), PROJECT_NAME_SHORT()
);
return 1;
}
}
