Re: DOM0 Page fault trap in NetBSD 3.0

[TlorD <tld%tld.digitalcurse.com@localhost>]

Manuel Bouyer wrote:
> On Wed, Mar 08, 2006 at 12:07:43AM +0100, TLorD wrote:
>>> It's probably dereferencing a NULL pointer but we need to find which one.
>>> In my local build aac_intr+0x23 is line 790 in sys/dev/ic/aac.c
>>> but it may not match your kernel (at last at first glance I can't see why
>>> this would cause a fault).
>> I'd love to, I just need to know how.
>> Do I have to send you the compiled kernel? Recompile with debug information
>> (will take ages to copy :P )?
>> As long as I can do that, I'll gladly help.
>> One thing I can safely say is that the halt happens at a later stage than 
>> aac0
>> attachment (it attaches the network cards after that and before the crash), 
>> so
>> I guess it's something interrupt-related, possibly the ld0 recognition (but
>> since I don't know how to scrollback, I'm quite helpless at that).
> 
> I think you just need to add a few printfs in the kernel, in
> the aac_intr() function. Maybe just adding
> #define AAC_DEBUG 0xff
> at the top of aacvar.h would be enouth for starting.
> 

Been there, done that.
dev/ic/aac.c lines 1440 and 1441 protest against %16D and a ', " "' too
many;
dev/ic/ld_aac.c line 188 protests against a parameter type mismatch.

I bluntly replaced %16D with %16llx and deferenced the pointer (I guess
it's wrong but I have no better idea), and forced a type cast on the
parameter.

Anyway, it compiled.

The dmesg log goes like this:
aac0 at pci1 dev 3 function 0: pci command status reg 0x08x Adaptec
ASR-2410SA
aac0: interrupting at irq 20, event channel 11
set hardware up for i960Rxaac0: error establishing init structure
fxp0 at ...........
fx0: interrupting ..............
fxp0: ethernet add...............
inphy0 at fxp0.....
inphy0: .....
(gdb kicks in here)

of particular interest the message "aac0: error establishing init
structure" after the i960Rx initialisation.

What now? A comparison with /i386's init message? Kernel consistency
checks? Heavy printfs?

Thanks again!