Date: Fri, 27 Mar 2009 14:23:46 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Switching to SMM with FreeBSD 6.2 onwards Message-ID: <49CCC552.5070001@icyb.net.ua> In-Reply-To: <gqia6l$cpu$1@ger.gmane.org> References: <17314.10813.qm@web45811.mail.sp1.yahoo.com> <200903271021.n2RALixB062663@sana.init-main.com> <gqia6l$cpu$1@ger.gmane.org>
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on 27/03/2009 12:35 Ivan Voras said the following:
> Takanori Watanabe wrote:
>> In message <17314.10813.qm@web45811.mail.sp1.yahoo.com>, Won De Erick wrote:
>>> Hi All,
>>>
>>> I'm not quite familiar with FreeBSD, but I want to do the following in 6.2/7.1
>>> .
>>>
>>> /* Raise IOPL to 3 to open all I/O ports */
>>> /* something like 'i386_iopl(3)' */
>>> ...
>> see i386_get_ioperm(2) or io(4).
>>
>>> /* Open SMRAM access */
>>> outl(unsigned int port, unsigned long int data);
>>>
>>>
>>> Also, I appreciate comments on the following wrapper:
>>>
>>> static inline outl(unsigned int port, unsigned long int data)
>>> {
>>> asm("outl %0, %1" : : "a" (data), "dN" (port));
>>> }
>>>
Take a look at machine/cpufunc.h
>>> My goal is to switch the processor to SMM by triggering SMI from userland.
>>
>> Probably this will work.
>> So what do you want ask about that?
>
> One thing that comes to my mind is this:
> http://invisiblethingslab.com/resources/misc09/smm_cache_fun.pdf
>
> :)
Yeah, and IDA Pro rocks too :-)
--
Andriy Gapon
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