看门狗不起作用

我按照手册来的
写好应用程序和Makefile
make后生成的文件放入yaffs2的/sbin下

但是板子还是一直重启,没有效果
串口说 找不到我的应用程序
串口显示 和 程序如下
请问什么原因？？？？？

------------------------------------------------------------
s3c2410-rtc s3c2410-rtc: rtc disabled, re-enabling
s3c2410-rtc s3c2410-rtc: rtc core: registered s3c as rtc0
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: starting watchdog timer
s3c2410-wdt s3c2410-wdt: watchdog active, reset abled, irq enabled
Advanced Linux Sound Architecture Driver Version 1.0.20.
ALSA device list:
  No soundcards found.
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
s3c2410-rtc s3c2410-rtc: setting system clock to 2010-02-23 01:54:37 UTC (1266890077)
end_request: I/O error, dev mtdblock2, sector 256
isofs_fill_super: bread failed, dev=mtdblock2, iso_blknum=64, block=128
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
yaffs: auto selecting yaffs2
block 1592 is bad
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 192K
/etc/init.d/rcS: line 28: app_wdt: not found
/etc/rc.d/init.d/httpd: line 16: /sbin/boa: not found

Please press Enter to activate this console.

“但是板子还是一直重启,”你写的这句话就表明看门狗已经工作了，并且每隔30s就重启一次（没有喂狗就会重启，假定时间设置为30s）。
“/etc/init.d/rcS: line 28: app_wdt: not found
/etc/rc.d/init.d/httpd: line 16: /sbin/boa: not found
”
这两句表明你的喂狗程序要么不存在，要么编译它的编译器和内核的编译器不一样导致的。