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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

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.

-- 
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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