Re: [Etherboot-discuss] tg3.zpxe crash

[Michael B. <mb...@fe...>]

On Wed, 31 Jan 2007, James Harper wrote:
> I just checked out the latest version and it now hangs as soon as it 
> tries to do dhcp, but doesn't reboot. It says something about trying 
> dhcp, then the mac address, then some ...'s, and then just hangs there. 
> Capslock doesn't work, and ctrl-alt-del doesn't work (two fairly useful 
> indicators that something went wrong :)

Sounds like it could be a NULL pointer dereference to me.  They're fast 
becoming one of my major irritants.  I don't see any easy way to guard 
against them without enabling paging.

You can try enabling NULL_TRAP in config.h; this should catch NULL method 
pointer dereferences, but won't help with NULL data dereferences.

> Any suggests as to what debug switches I could try? I suspect that the 
> problem isn't the dhcp itself but something a bit more low level...

Since you're not getting to the high traffic part, you may as well turn on 
as much debugging as possible, just to get a better idea of when it locks 
up.  DEBUG=netdevice is pretty verbose; give that a go.

Michael