Date: Mon, 1 Dec 2008 01:20:14 -0800 (PST) From: Won De Erick <won.derick@yahoo.com> To: Rink Springer <rink@FreeBSD.org>, Christoph Mallon <christoph.mallon@gmx.de> Cc: freebsd-hackers@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: Watchdog for Boser (HS-7001) Message-ID: <611173.7111.qm@web45805.mail.sp1.yahoo.com> References: <547602.79284.qm@web45809.mail.sp1.yahoo.com> <4933A29B.8060907@gmx.de> <20081201090421.GA99082@rink.nu>
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> ----- Original Message ----
> From: Rink Springer <rink@FreeBSD.org>
>
>
On Mon, Dec 01, 2008 at 09:38:51AM +0100, Christoph Mallon wrote:
> > Userland is not allowed to write to ports. That's the bus error you see.
> > Also without a call to the exit syscall at the end, it will segfault.
>
> Note that you can write to ports from userland by opening /dev/io - if
> you have it opened, you can write to the ports.
>
I've added the following at the end
mov eax, 1 ; SYS_exit
call doint
doint:
int 0x80
ret
Besides, I can see the following at /dev
crw------- 1 root wheel 0, 16 Nov 27 01:53 io
How should I make this open? do i need to %include this?
> --
> Rink P.W. Springer - http://rink.nu
> "Anyway boys, this is America. Just because you get more votes doesn't
> mean you win." - Fox Mulder
>
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