/proc/cmdline in NetBSD? how to get kernel boot parameter?

[Wean Irdeh <wean.irdeh%gmail.com@localhost>]

In Linux, parameter passed from bootloader to kernel can be obtained from /proc/cmdline

Like 

'linux /boot/vmlimuz root=/dev/sda2 mychoice=custom'

and I can get it from terminal by running cat /proc/cmdline

Which output: root=/dev/sda2 mychoice=custom

What if I passed 

'knetbsd /netbsd root=/dev/dk1 mychoice=custom'

from GRUB?

How can I get the kernel parameter I have mentioned above in terminal?