RE: busybox shell doesn't come up or get stuck.. where should I look or how should I debug it?

I had mistakenly omitted '-static' option when making init program.(repeated Hello! Print). So now the board output looks like this. (...) ### point 106-1 Run /init as init process ### point 106-2, ret = 0 Hello! i=0 Hello! i=1 Hello! i=2 ... Hello! i=115 Hello! i=116 Hello! i=117 He <=== hangs. So the running the 'init' program (whether it's a script or a binary program) is ok. The binary 'init' program stops after printing Hello 117 times so there seems to be more basic problem in H/W or device tree. And when the init script ran 'exec /bin/sh', the shell didn't start so 'running exec inside a script' can have a problem. If anyone has a suggestion or advice, I welcome it. Thank you! Chan Kim