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Date: Wed, 10 Feb 2010 23:04:49 -0800
From: Julian Elischer <julian@elischer.org>
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To: james toy <nil@opensesame.st>
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Cc: freebsd-hackers <freebsd-hackers@freebsd.org>,
	David Hemmendinger <hemmendd@union.edu>
Subject: Re: KLD hello.ko: depends on kernel - not available or version
	mismatch
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james toy wrote:
> Hello Hackers,
> 
>     I am working on learning to write FreeBSD drivers; however, I have
> some practice writing IOKit drivers for MacOSX (they are entirely
> different I know!).  The code I am working with can be found here:
> 
> http://pastebin.com/m2bbb393c
> 
> and I am getting the error:
> 
> dontpanic# kldload ./hello.ko
> kldload: can't load ./hello.ko: Exec format error
> 
> dmesg reads:
> 
> dontpanic# kldload ./hello.ko
> kldload: can't load ./hello.ko: Exec format error
> 
> and finally uname -a:
> 
> FreeBSD dontpanic.union.edu 9.0-CURRENT FreeBSD 9.0-CURRENT #1
> r198859: Wed Feb 10 09:59:54 EST 2010
> james@dontpanic.union.edu:/usr/obj/usr/src_klog/sys/DONTPANIC  amd64
> 
> any information pointing me to being able to load this driver would be
> greatly appreciated.
> 

That error is a sort of catch-all. But the kernel linker should put 
some more specific information out in the kernel console/dmseg.

so 'dmesg' may help you if you have something like a bad symbol.

> respectfully,
> 
> james toy
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