isDifferentArch

isDifferentArch.cpp

/*
 * XXX: Mixed architecture don't quite work.  See also
 * http://www.corsix.org/content/dll-injection-and-wow64
 */
static BOOL
isDifferentArch(HANDLE hProcess)
{
    typedef BOOL (WINAPI *PFNISWOW64PROCESS)(HANDLE, PBOOL);
    PFNISWOW64PROCESS pfnIsWow64Process;
    pfnIsWow64Process = (PFNISWOW64PROCESS)
        GetProcAddress(GetModuleHandleA("kernel32"), "IsWow64Process");
    if (!pfnIsWow64Process) {
        return FALSE;
    }

    // NOTE: IsWow64Process will return false on 32-bits Windows
    BOOL isThisWow64;
    BOOL isOtherWow64;
    if (!pfnIsWow64Process(GetCurrentProcess(), &isThisWow64) ||
        !pfnIsWow64Process(hProcess, &isOtherWow64)) {
        logLastError("IsWow64Process failed");
        return FALSE;
    }

    return bool(isThisWow64) != bool(isOtherWow64);
}