QNX Operating System/Discussion/OSMeta/How does QNX kernel protect itself against bus master devices? /List of Posts
 
Forum Topic - How does QNX kernel protect itself against bus master devices? : (2 Items)
   
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fyrt sen
02/26/2008 1:17 PM
post5283
How does QNX kernel protect itself against bus master devices?   
Hi, all!
I'm a newbie in system programming and have a stupid question.

Bus master devices (e.g. USB host-controller) can write directly to the memory. Can bad driver destroy the QNX kernel?

Thanks for your attention!

Fyrse.
Brian Stecher(deleted)
02/27/2008 8:13 AM
post5311
Re: How does QNX kernel protect itself against bus master devices ?   
On Tue, Feb 26, 2008 at 01:17:55PM -0500, fyrt sen wrote:
> Bus master devices (e.g. USB host-controller) can write directly 
> to the memory. Can bad driver destroy the QNX kernel?

Yup.

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Brian Stecher (bstecher@qnx.com)        QNX Software Systems
phone: +1 (613) 591-0931 (voice)        175 Terence Matthews Cr.
       +1 (613) 591-3579 (fax)          Kanata, Ontario, Canada K2M 1W8

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