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📁 一份很好的linux入门资料
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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;vertex&nbsp;(lancelord),&nbsp;信区:&nbsp;Linux&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;Linux&nbsp;核心启动过程一览&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Wed&nbsp;May&nbsp;&nbsp;5&nbsp;16:43:07&nbsp;1999)&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>发信人:&nbsp;vertex&nbsp;(lacelord),&nbsp;信区:&nbsp;Linux&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;Linux&nbsp;启动信息&nbsp;<BR>发信站:&nbsp;9781&nbsp;BBS&nbsp;(Tue&nbsp;May&nbsp;&nbsp;4&nbsp;10:26:21&nbsp;1999),&nbsp;转信&nbsp;<BR>&nbsp;<BR>/*&nbsp;<BR>&nbsp;本文参考了&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="http://gem.ncic.ac.cn/~xhg/khg/HyperNews/get/tour/tour.html">http://gem.ncic.ac.cn/~xhg/khg/HyperNews/get/tour/tour.html</A>&nbsp;<BR>&nbsp;&nbsp;&nbsp;<BR>&nbsp;欢迎指正.&nbsp;<BR>&nbsp;-------------------------------------------------------------------&nbsp;<BR>&nbsp;用dmesg命令可以看到linux启动打出的消息.&nbsp;<BR>&nbsp;<BR>&nbsp;从这可以看到linux启动的过程.&nbsp;<BR>&nbsp;主要的源文件&nbsp;<BR>&nbsp;可以到&nbsp;<A HREF="http://gem.ncic.ac.cn/lance/lxr/source/init/main.c">http://gem.ncic.ac.cn/lance/lxr/source/init/main.c</A>&nbsp;<BR>*/&nbsp;<BR>--------------------------------------------------------------------&nbsp;<BR>/**&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;内核的启动最后是到&nbsp;start_kernel&nbsp;(&nbsp;in&nbsp;/init/main.c&nbsp;)&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;head.S&nbsp;--&gt;&nbsp;main.c(start_kernel)&nbsp;..&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;建议每个人都读一下&nbsp;main.c&nbsp;(&nbsp;init/&nbsp;)&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;有空可以读&nbsp;head.S&nbsp;(&nbsp;arch/i386/boot/&nbsp;)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>**/&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>/**&nbsp;<BR>&nbsp;&nbsp;第一部分&nbsp;&nbsp;:&nbsp;内核初始化以及启动.&nbsp;<BR>&nbsp;<BR>**/&nbsp;<BR>Loading&nbsp;....[&nbsp;bootsect.S&nbsp;]&nbsp;<BR>uncompress&nbsp;.....[&nbsp;decompress_kernel()&nbsp;]&nbsp;<BR>/*&nbsp;&nbsp;<BR>&nbsp;*&nbsp;&nbsp;main.c&nbsp;---&gt;&nbsp;start_kernel()&nbsp;开始.&nbsp;<BR>&nbsp;*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;*&nbsp;&nbsp;开始&nbsp;printk(banner);&nbsp;<BR>&nbsp;*/&nbsp;<BR>&nbsp;&nbsp;&nbsp;<BR>Linux&nbsp;version&nbsp;2.2.6&nbsp;(root@lance)&nbsp;(gcc&nbsp;version&nbsp;2.7.2.3)&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;#40&nbsp;Sun&nbsp;Apr&nbsp;18&nbsp;17:44:20&nbsp;CST&nbsp;1999&nbsp;<BR>&nbsp;<BR>/*&nbsp;以下是&nbsp;/arch/i386/time.c&nbsp;中&nbsp;init_time()&nbsp;打出的信息&nbsp;*/齱&nbsp;<BR>&nbsp;<BR>Detected&nbsp;199908264&nbsp;Hz&nbsp;processor.&nbsp;<BR>/*&nbsp;console_init()&nbsp;--&gt;&nbsp;drivers/char/tty_io.c&nbsp;*/&nbsp;<BR>Console:&nbsp;colour&nbsp;VGA+&nbsp;80x25&nbsp;<BR>&nbsp;<BR>/*运行一个循环,测量一下&nbsp;MIPS&nbsp;--&nbsp;为什么要干这件傻事??*/齱&nbsp;<BR>/*&nbsp;我知道了&nbsp;...&nbsp;这是因为内核需要知道一个确定的机器指令周期来实现实时的延迟.&nbsp;<BR>&nbsp;&nbsp;&nbsp;为什么要打印出来&nbsp;??&nbsp;这有两个原因&nbsp;:&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1&nbsp;.&nbsp;用于&nbsp;DEBUG&nbsp;.&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2&nbsp;.&nbsp;搞笑用途&nbsp;,&nbsp;Linus&nbsp;Torvalds&nbsp;每每看见用户对此疑惑不解时,总是&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;大笑....:-((&nbsp;<BR>*/&nbsp;<BR>&nbsp;<BR>Calibrating&nbsp;delay&nbsp;loop...&nbsp;199.48&nbsp;BogoMIPS&nbsp;<BR>&nbsp;<BR>/*&nbsp;init_mem&nbsp;*/&nbsp;<BR>&nbsp;<BR>Memory:&nbsp;63396k/65536k&nbsp;available&nbsp;(848k&nbsp;kernel&nbsp;code,&nbsp;408k&nbsp;reserved,&nbsp;856k&nbsp;data,&nbsp;28k&nbsp;&nbsp;<BR>&nbsp;<BR>/**&nbsp;dquote_init()&nbsp;&nbsp;**/&nbsp;<BR>&nbsp;<BR>VFS:&nbsp;Diskquotas&nbsp;version&nbsp;dquot_6.4.0&nbsp;initialized&nbsp;<BR>&nbsp;<BR>/*&nbsp;??????????&nbsp;**/&nbsp;<BR>&nbsp;<BR>CPU:&nbsp;Intel&nbsp;Pentium&nbsp;Pro&nbsp;stepping&nbsp;09&nbsp;<BR>Checking&nbsp;386/387&nbsp;coupling...&nbsp;OK,&nbsp;FPU&nbsp;using&nbsp;exception&nbsp;16&nbsp;error&nbsp;reporting.&nbsp;<BR>Checking&nbsp;'hlt'&nbsp;instruction...&nbsp;OK.&nbsp;<BR>&nbsp;<BR>POSIX&nbsp;conformance&nbsp;testing&nbsp;by&nbsp;UNIFIX&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>/**&nbsp;<BR>此后调用&nbsp;linux_thread(init&nbsp;,..,..,)(arch/i386/kernel/process.c)&nbsp;&nbsp;<BR>&nbsp;<BR>创建一个运行&nbsp;init&nbsp;的进程.&nbsp;<BR>
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