Subject: Re: AS1200 problems
To: None <thorpej@wasabisystems.com, port-alpha@netbsd.org>
From: David Hopper <dhop@nwlink.com>
List: port-alpha
Date: 02/01/2002 11:17:26
David Hopper wrote:
>
> Jason R Thorpe wrote:
> >
> >On Thu, Jan 31, 2002 at 03:42:14PM -0800, David Hopper wrote:
> >
> >> I have been having frequent memory management faults on my AlphaServer 1200
> >> 5/533.
> >> [...]
> >
> > It's really weird that both $pc and $ra are 0. It's almost like you
> > have a trashed stack (restored bogus value into $ra, and then executed
> > a ret, putting that bogus value into $pc).
> >
> > Can you use gdb to tell me what $pv points to?
> > -- Jason R. Thorpe <thorpej@wasabisystems.com>
>
> I came in this morning to yet another fault, during a build compile of
> f_enum.c; this time with a full debug kernel + symbols
...and two more faults this morning, one on sed, the latest on nbmake.
Here's a full register dump from the latest, the nbmake fault:
Let me know what else I can report.
}show registers
v0 0x6
t0 0xfffffc00005dfa20 db_onpanic
t1 0x1
t2 0xfffffc004fff8000
t3 0x1
t4 0
t5 0
t6 0xfffffc0000533a72 fmt.144+0xf73
t7 0xffffffffffffffff
s0 0xfffffe0023e89398
s1 0x8 rettmp
s2 0xfffffc0000637b60 msgbufp
s3 0xfffffc00005e0688 msgbufenabled
s4 0x100 rn+0xe0
s5 0x2
s6 0xfffffc00005bbfec msgperiod.210+0x1ce4
a0 0x6
a1 0x7ffffe7cc0003d0
a2 0xfffffcf980007aa0
a3 0x6000 rn+0x5fe0
a4 0xffffffffffffffff
a5 0x8 rettmp
t8 0x1e framesz+0xe
t9 0
t10 0x4ab8ff9e43c0
t11 0x1fc1eacb
ra 0xfffffc00003aab88 panic+0x168
t12 0xfffffc0000509920 cpu_Debugger
at 0xfffffc00005e0670 sched_whichqs
gp 0xfffffc00005d4f98 special_symbols+0x8160
sp 0xfffffe0023e89318
pc 0xfffffc0000509924 cpu_Debugger+0x4
ps 0x6
ai 0x1fc1eacb
pv 0xfffffc0000509920 cpu_Debugger
cpu_Debugger_+0x4: ret zero,(ra)
}trace
cpu_Debugger() at cpu_Debugger+0x4
panic() at panic+0x168
trap() at trap+0x93c
XentMM() at XentMM+0x20
--- memory management fault (from ipl 6) ---
f30save() at 0
f30save() at 0
--- root of call graph ---
}examine pv
pv: 210022