Hello!

 I got panic with NetBSD evbsh3 porting my evaluation board that
mount SH4(7750S) and simple serial port and some LAN controllers.
 illustrate the following boot log. it is just nfs_boot failure 
and read /sbin/init from md_root fs.

 unfortunately, as soon as getting any soft trap, and come out 
endless intr_handler loop :-(

but, I say it is not reentrant, so I lay a snare that in(+)/out(-) 
counter on entrance to and way out for `hardclock' function. 
counter value show me a process stay the inside at 
(maybe 0x88005c60).

and I thin down indication from intr_handler by 1, 16 and 256,
or changed timer interval into 64hz, 32hz, but display timing
don't change. so this crash is not the origin in timer intr.
when make another attenpt, stimulating this board with NMI
displaied int_no change 420 to 1c0 (NMI), but spc in not change.
I wonder why replace only int_no.

the register r15 (is use for stacks) is droped 24 at a time,
and kernel crash when it should fully close a code precipice.

 where should I explore NetBSD source tree?

# of cource, some private patch applied for LAN controller, but
# it works fine. the truth, get successfully reading /sbin/init
# from NFS server. the question is on next phasese.
------------------------+
Hiroki MINEMATSU/Aimcom |
minematu@aimcom.co.jp   |
+=+=+=+=+=+=+=+=+=+=+=+  boot log +=+=+=+=+=+=+=+=+=+=+=+ 
nfs_boot: timeout...
cannot mount root, error = 60
root device (default md0a):
dump device (default md0b): none
file system (default nfs): ffs
root on md0a
readclock: -1900/1/1/0/0/0(6)
WARNING: clock time much less than file system time
WARNING: using file system time
WARNING: CHECK AND RESET THE DATE!
init: copying out flags `-s' 3
init: copying out path `/sbin/init' 11
trap f00 spc 113c ssr 0
curproc 0x88757000
trap f00 spc 113c ssr 0
curproc 0x88757000
trap f00 spc 113c ssr 0
curproc 0x88757000
trap f00 spc 113c ssr 0
curproc 0x88757000
trap f00 spc 113c ssr 0
curproc 0x88757000
trap f00 spc 113c ssr 0
curproc 0x88757000
intr_handler:int_no 420 spc 880be192 ssr 40000000 r15 88753f0c curproc 88757000
intr_handler:int_no 420 spc 88005c60 ssr 40000000 r15 88753e58 curproc 88757000
intr_handler:int_no 420 spc 88005c60 ssr 40000000 r15 88753e34 curproc 88757000
... 
intr_handler:int_no 420 spc 88005c60 ssr 40000000 r15 88753e34 curproc 88757000