linux-kernel - Re: Kernel Debugging Support

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Date:	Mon, 04 Aug 2014 07:37:35 -0400
From:	Austin S Hemmelgarn <ahferroin7@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>,
	Nick Krause <xerofoify@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: Kernel Debugging Support

On 2014-08-02 09:48, Alan Stern wrote:
> On Sat, 2 Aug 2014, Nick Krause wrote:
> 
>> Hey Sharp,
>> After reading around seems people want support for usb debugging in
>> kgdb or other usb based solutions.
>> If you and the other developers are able to help me out a bit as I am
>> new I can definitively write this
>> area of kgdb support.
> 
> Doesn't kgdb already support USB for debugging?
> 
> Alan Stern

AFAICT, on x86 it only supports using either a console capable serial
port (so you could do that over USB if you have USB serial console
support built-in, but most people I know don't compile that in, and in
fact that is the only reason that i compile USB serial support in
instead of making it a module), and an AT compatible keyboard with any
console option.  It would be really nice to have USB keyboard support in
there so that you don't have to reboot with special options and extra
hardware plugged in to get to the debugger, although doing something
that supports more than just the HID boot protocol will probably be tricky.

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