freebsd-hackers Digest, Vol 588, Issue 1

[Benjamin Kaduk]

On Tue, 22 Jul 2014, Nidal Khalil wrote:

> Hello All,
> OK, I was able to capture the early boot output by entering ddb
> GDB: no debug ports present
> KDB: debugger backend; ddb
>
> My pc does not have a serial port. However I am using usb to serial by
> Prolific Tech.
> You mean to tell me that the kernel gdb shim is hardwired to /dev/cuau0?

It is not hardwired to that exact device node, but yes, a USB-to-serial 
adapter will not work for it.

A firewire port is also supposed to be usable for remote kernel debugging, 
as documented at 
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-dcons.html

-Ben