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Date: Fri, 15 Nov 2002 14:51:11 -0800
From: Andrew Morton <akpm@digeo.com>
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To: Stelian Pop <stelian.pop@fr.alcove.com>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: lan based kgdb
References: <3DD5591E.A3D0506D@efi.com> <334960000.1037397999@flay> <ar3op8$f20$1@penguin.transmeta.com> <20021115222430.GA1877@tahoe.alcove-fr>
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Stelian Pop wrote:
> 
> On Fri, Nov 15, 2002 at 09:26:00PM +0000, Linus Torvalds wrote:
> 
> > I dunno. I might even be willing to apply kgdb patches to my tree if it
> > just could use the regular network card I already have connected on all
> > my machines. None of my laptops have a serial line, for example, but
> > they all have networking.
> >
> > Soon even _desktops_ probably won't have serial lines any more, only USB.
> 
> Using USB instead of the serial line or the network card would be
> the best IMHO, because:
> 

Here is the kgdb stub's "send a byte" function:

static void
write_char(int chr)
{
       while (!(inb(gdb_port + UART_LSR) & UART_LSR_THRE)) ;

       outb(chr, gdb_port + UART_TX);
}

Need I say more?
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