18 	if (sig == NULL)  in valid_sig()
47 	if (sig == NULL)  in api_search_sig()
66 	*sig = NULL;  in api_search_sig()
80 	if (!syscall(API_GETC, NULL, &c))  in ub_getc()
90 	if (!syscall(API_TSTC, NULL, &t))  in ub_tstc()
98 	syscall(API_PUTC, NULL, &c);  in ub_putc()
103 	syscall(API_PUTS, NULL, s);  in ub_puts()
114 	syscall(API_RESET, NULL);  in ub_reset()
130 		return NULL;  in ub_get_sys_info()
132 	return ((err) ? NULL : &si);  in ub_get_sys_info()
143 	syscall(API_UDELAY, NULL, &usec);  in ub_udelay()
150 	if (!syscall(API_GET_TIMER, NULL, &cur, &base))  in ub_get_timer()
169 	return ((i < 0 || i >= UB_MAX_DEV) ? NULL : &devices[i]);  in ub_dev_get()
186 	if (!syscall(API_DEV_ENUM, NULL, di))  in ub_dev_enum()
189 	while (di->cookie != NULL) {  in ub_dev_enum()
200 		if (!syscall(API_DEV_ENUM, NULL, di))  in ub_dev_enum()
236 	if (!syscall(API_DEV_CLOSE, NULL, di))  in ub_dev_close()
347 	if (!syscall(API_ENV_GET, NULL, name, &value))  in ub_env_get()
348 		return NULL;  in ub_env_get()
355 	syscall(API_ENV_SET, NULL, name, value);  in ub_env_set()
365 	env = NULL;  in ub_env_enum()
372 	if (!syscall(API_ENV_ENUM, NULL, last, &env))  in ub_env_enum()
373 		return NULL;  in ub_env_enum()
377 		return NULL;  in ub_env_enum()
417 	syscall(API_DISPLAY_CLEAR, NULL);  in ub_display_clear()