R_API RBuffer *r_core_syscallf (RCore *core, const char *name, const char *fmt, ...) {
	char str[1024];
	RBuffer *buf;
	va_list ap;
	va_start (ap, fmt);

	vsnprintf (str, sizeof (str), fmt, ap);
	buf = r_core_syscall (core, name, str);

	va_end (ap);
	return buf;
}
R_API RBuffer *r_core_syscallf (RCore *core, const char *name, const char *fmt, ...) {
	char str[1024];
	RBuffer *buf;
	va_list ap;
	va_start (ap, fmt);

	vsnprintf (str, sizeof (str), fmt, ap);
	buf = r_core_syscall (core, name, str);

	va_end (ap);
	return buf;
}