const runtime._AT_NULL

3 uses

	runtime (current package)
		os_linux.go#L205: 	_AT_NULL   = 0  // End of vector
		os_linux.go#L269: 	buf[len(buf)-2] = _AT_NULL
		os_linux.go#L279: 	for ; auxv[i] != _AT_NULL; i += 2 {