Good resourse URL

http://bbs.chinaunix.net/thread-2029937-1-1.html

http://bbs.chinaunix.net/thread-3590142-1-1.html
http://bbs.chinaunix.net/thread-2175645-1-1.html

http://www.chinaunix.net/old_jh/4/1097241.html

http://www.chinaunix.net/old_jh/4/1029781.html

http://bbs.chinaunix.net/thread-2051064-1-1.html

http://www.cnblogs.com/sdphome/archive/2011/03/20/1989827.html

http://bbs.chinaunix.net/thread-2031780-1-1.html

U-Boot：

ftp://ftp.denx.de/pub/u-boot/

http://bbs.chinaunix.net/thread-1930079-1-1.html

http://bbs.chinaunix.net/thread-1930079-1-1.html 内核源码版精华帖分类汇总

U-Boot:  http://git.omapzoom.org/?p=repo/u-boot.git;a=shortlog;h=refs/heads/omap4_dev

x-loader: http://git.omapzoom.org/?p=repo/x-loader.git;a=shortlog;h=refs/heads/omap4_dev

KGDB： http://en.wikipedia.org/wiki/KGDB