From owner-freebsd-current@FreeBSD.ORG  Tue May 12 12:07:07 2009
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Date: Tue, 12 May 2009 13:49:46 +0200
From: "Rodrigo OSORIO (ros)" <rodrigo@bebik.net>
To: "????ccuiyyan@sina.com" <ccuiyyan@gmail.com>
Message-ID: <20090512114946.GA79236@hodja.bebik.net>
References: <4451ccf20905120329x68e86081p90d0098ad5ea5d5b@mail.gmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: Is there printk() in FreeBSD?
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On 12/05/09 18:29 +0800, ????ccuiyyan@sina.com wrote:
> Dear all;
> 
>        A simple question: sometimes i need to print out some kernel
> 
>        address in FreeBSD kernel. And i know printk() can be used in
> 
>        Linux to print the message to dmesg, Is there some similar in
> FreeBSD?
> 
>        It seems that printk() cannot work in the FreeBSD kernel. And
> 
>        where can we find the output? in dmesg or somewhere else?
> 
>                                                            Best Wishes!
> 
>                                                                  Yan
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Hi

Please check the printf(9) to how to print messages in kernel code  :
http://www.freebsd.org/cgi/man.cgi?query=printf&apropos=0&sektion=9&manpath=FreeBSD+7.2-RELEASE&format=html

Regards
- Rodrigo