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Re: Loading KEXTs dynamically
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Re: Loading KEXTs dynamically

  • Subject: Re: Loading KEXTs dynamically
  • From: Shawn Erickson <email@hidden>
  • Date: Mon, 19 Aug 2002 18:05:00 -0700
On Monday, August 19, 2002, at 12:23 PM, Sean Morrell wrote:

----- Original Message -----
From: Sean McBride <email@hidden>
To: Sean Morrell <email@hidden>; <email@hidden>
Sent: Monday, August 19, 2002 11:25 AM
Subject: Re: Loading KEXTs dynamically


Sean Morrell (email@hidden) wrote:

Can I load and use a KEXT dynamically? If so, what is the API and where
would I find a source example?

man kextload

You really should read the various docs about IOKit and kexts, etc.

My apologies. Let me clarify. I'm not referring to manually loading a KEXT
from the command line. I want to dynamically load and use a KEXT within a
driver. I do not want to load the dependent KEXT (in fact it won't load at
boot time), until after boot has completed and the code from the KEXT is
needed.

Use IOKits driver matching facilities. Basically the same methods that got you main KEXT loaded can be used to trigger the matching, loading, probing and start of other KEXTs. See the IOKit docs and look for IOProviderClass, IOService::registerService, nubs, etc...

http://developer.apple.com/techpubs/macosx/Darwin/IOKit/ IOKitFundamentals/Matching/Driver_and__ce_Matching.html

http://developer.apple.com/techpubs/macosx/Darwin/Reference/Kernel/ IOService/Classes/IOService/Functions/Functions.html#registerService

I have an example that covers some of this up at OpenDarwin (still trying to get time work on more and better examples). See http://opendarwin.org/cgi-bin/cvsweb.cgi/proj/IOKitExamples/. Oops... it doesn't look like I have upload that example yet, someday soon I hope.

-Shawn
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 >Re: Loading KEXTs dynamically (From: "Sean Morrell" <email@hidden>)

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