pckbc_enqueue_cmd

On Wed, 2 Sep 1998, Jason Thorpe wrote:

> On 02 Sep 1998 20:39:40 +0200 
>  joda@pdc.kth.se (Johan Danielsson) wrote:
> 
>  > > ftp://ftp.feral.com/outgoing/isptest/netbsd.alpha.gz
>  > 
>  > While trying this kernel I discovered that it panics just after
>  > probing the keyboard, if I have one connected:
>  > 
>  > 
>  > lpt0 at isa0 port 0x3bc-0x3bf irq 7
>  > pckbc0 at isa0 port 0x60-0x64
>  > pckbd0 at pckbc0 (kbd slot)
>  > 
>  > fatal kernel trap:
>  > 
>  >     trap entry = 0x2 (memory management fault)
>  >     a0         = 0x18
> 
> Yummy!  It deref'd a NULL pointer!
> 
>  >     a1         = 0x1
>  >     a2         = 0x0
>  >     pc         = 0xfffffc0000575ae0
> 
> ...maybe Matt could gdb the debugging symbol version of his kernel
> and type "list *0xfffffc0000575ae0" to see where it died :-)
> 
>  >     ra         = 0xfffffc0000575ab8
>  >     curproc    = 0xfffffc0000672e10
> 
> 
> 
> Jason R. Thorpe                                       thorpej@nas.nasa.gov
> NASA Ames Research Center                            Home: +1 408 866 1912
> NAS: M/S 258-5                                       Work: +1 650 604 0935
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>