prog_modctl
if (prog_modctl(MODCTL_LOAD, &cmdargs)) {
if (prog_modctl(MODCTL_EXISTS, (void *)(uintptr_t)1)) {
if (prog_modctl(MODCTL_EXISTS, (void *)(uintptr_t)0)) {
if (prog_modctl(MODCTL_STAT, &iov)) {
if (prog_modctl(MODCTL_UNLOAD, argv[i])) {