thanks,Mr. Dyer I got it where's EXPORT_FUNC(x) defined,but I am not sure what the func. jumptable_init() does in U-Boot Best regards! sun --------------------------------- 抢注雅虎免费邮箱3.5G容量,20M附件! -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.denx.de/pipermail/u-boot/attachments/20070730/7984e85c/attachment.htm