NetBSD arm bootup question

[Joe Culler <joe.culler%gmail.com@localhost>]

Hello,

I'm new to NetBSD/arm. I'm trying to port  NetBSD to s3c6410 with no luck.
When I boot netbsd.bin from u-boot, I got:

u-boot>> go 0x50200000
## Starting application at 0x50200000 ...
undefined instruction
pc : [<0056b7b8>]    lr : [<00f2c124>]
sp : 00f0fb6c  ip : ffffffff  fp : 00f0fddd
r10: 00f0fcdd  r9 : 00000000  r8 : 00f0ffd0
r7 : 00f0fc8c  r6 : 00000001  r5 : 00f0fc90  r4 : 00200000
r3 : c0325e18  r2 : 0056e5b8  r1 : 00000000  r0 : 00000000
Flags: nzcv  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

software interrupt
pc : [<00f101bc>]    lr : [<00f101ec>]
sp : 00f10000  iþ

Does that mean my smdk6410_machdep.c and smdk641_start.S has problem or
my interrupt code has problems? Would anyonne tell me how to debug?

Thanks.

- Joe