Re: port-amd64/32816: amd64 can not load lkms

[Andrew Doran <ad%netbsd.org@localhost>]

On Sun, Apr 19, 2009 at 08:08:24PM +1000, matthew green wrote:

>     > From: matthew green <mrg%eterna.com.au@localhost>
>     > To: gnats-bugs%netbsd.org@localhost
>     > Cc: netbsd-bugs%netbsd.org@localhost
>     > Subject: Re: port-amd64/32816: amd64 can not load lkms
>     > Date: Sun, 19 Apr 2009 12:18:17 +1000
>     > 
>     >  FYI:
>     >  
>     >  i tested andrew's fix for this on netbsd-5 and have submitted pullups.
>     
>     IIRC amd64 was loading lkms into the ISA I/O hole and so corrupting 
> shadowed
>     ROM images, video memory, etc.
> 
> DEV       0  -1/161 ffffffff80e24000 00b4 ffffffff80e4c820   2 pf
> 
> this doesn't seem anywhere near ISA or VGA memory?

I misremembered. It loaded modules at atdevbase, blatting the ISA hole in
the process.

>     >  there's another problem with /dev/ksyms not working properly for 
> modload
>     >  (really ld(1)) that is workaroundable with -A /netbsd.
>     
>     I have a patch to disable /dev/ksyms usage in modload. It doesn't really
>     matter for the LKMs that we ship.
> 
> i thought this used to work.

By luck I guess.