📄 printk.c

📁 linux0.11 version(301k)
💻 C
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<!doctype html public "-//W3C//DTD HTML 3.2//EN"><html><head><title>Linux/kernel/printk.c</title><meta http-equiv=Content-Type content="text/html; charset=gb2312"><base href="http://oldlinux.org/lxr/http/"></head><body bgcolor=white><div align=center>   [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/printk.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>]</div><h1 align=center>  <a href="http:/">     OldLinux</a>  <a href="http:blurb.html">    交叉引用</a><br>  <a href="source/">Linux</a>/<a href="source/kernel/">kernel</a>/<a href="source/kernel/printk.c">printk.c</a></h1><div align=center>    <b>版本:</b>   [<a href="source/kernel/printk.c?v=1.0">1.0</a>] [<a href="source/kernel/printk.c?v=0.99.11">0.99.11</a>] [<a href="source/kernel/printk.c?v=0.99">0.99</a>] [<a href="source/kernel/printk.c?v=0.97">0.97</a>] [<a href="source/kernel/printk.c?v=0.96a">0.96a</a>] [<a href="source/kernel/printk.c?v=0.95">0.95</a>] [<a href="source/kernel/printk.c?v=0.12">0.12</a>] [<b><i>0.11</i></b>] [<a href="source/kernel/printk.c?v=0.01">0.01</a>]  <br>  <b>体系结构:</b>   [<b><i>i386</i></b>]  <br></div><hr><pre>  <a name=L1 href="source/kernel/printk.c#L1">1</a> <b><i>/*</i></b>  <a name=L2 href="source/kernel/printk.c#L2">2</a> <b><i> *  linux/kernel/printk.c</i></b>  <a name=L3 href="source/kernel/printk.c#L3">3</a> <b><i> *</i></b>  <a name=L4 href="source/kernel/printk.c#L4">4</a> <b><i> *  (C) 1991  Linus Torvalds</i></b>  <a name=L5 href="source/kernel/printk.c#L5">5</a> <b><i> */</i></b>  <a name=L6 href="source/kernel/printk.c#L6">6</a>   <a name=L7 href="source/kernel/printk.c#L7">7</a> <b><i>/*</i></b>  <a name=L8 href="source/kernel/printk.c#L8">8</a> <b><i> * When in kernel-mode, we cannot use printf, as fs is liable to</i></b>  <a name=L9 href="source/kernel/printk.c#L9">9</a> <b><i> * point to 'interesting' things. Make a printf with fs-saving, and</i></b> <a name=L10 href="source/kernel/printk.c#L10">10</a> <b><i> * all is well.</i></b> <a name=L11 href="source/kernel/printk.c#L11">11</a> <b><i> */</i></b> <a name=L12 href="source/kernel/printk.c#L12">12</a> #include &lt;stdarg.h&gt; <a name=L13 href="source/kernel/printk.c#L13">13</a> #include &lt;stddef.h&gt; <a name=L14 href="source/kernel/printk.c#L14">14</a>  <a name=L15 href="source/kernel/printk.c#L15">15</a> #include &lt;linux/kernel.h&gt; <a name=L16 href="source/kernel/printk.c#L16">16</a>  <a name=L17 href="source/kernel/printk.c#L17">17</a> static char <a href="ident?i=buf">buf</a>[1024]; <a name=L18 href="source/kernel/printk.c#L18">18</a>  <a name=L19 href="source/kernel/printk.c#L19">19</a> extern int <a href="ident?i=vsprintf">vsprintf</a>(char * <a href="ident?i=buf">buf</a>, const char * fmt, <a href="ident?i=va_list">va_list</a> args); <a name=L20 href="source/kernel/printk.c#L20">20</a>  <a name=L21 href="source/kernel/printk.c#L21">21</a> int <a href="ident?i=printk">printk</a>(const char *fmt, ...) <a name=L22 href="source/kernel/printk.c#L22">22</a> { <a name=L23 href="source/kernel/printk.c#L23">23</a>         <a href="ident?i=va_list">va_list</a> args; <a name=L24 href="source/kernel/printk.c#L24">24</a>         int i; <a name=L25 href="source/kernel/printk.c#L25">25</a>  <a name=L26 href="source/kernel/printk.c#L26">26</a>         <a href="ident?i=va_start">va_start</a>(args, fmt); <a name=L27 href="source/kernel/printk.c#L27">27</a>         i=<a href="ident?i=vsprintf">vsprintf</a>(<a href="ident?i=buf">buf</a>,fmt,args); <a name=L28 href="source/kernel/printk.c#L28">28</a>         <a href="ident?i=va_end">va_end</a>(args); <a name=L29 href="source/kernel/printk.c#L29">29</a>         __asm__(<i>"push %%fs\n\t"</i> <a name=L30 href="source/kernel/printk.c#L30">30</a>                 <i>"push %%ds\n\t"</i> <a name=L31 href="source/kernel/printk.c#L31">31</a>                 <i>"pop %%fs\n\t"</i> <a name=L32 href="source/kernel/printk.c#L32">32</a>                 <i>"pushl %0\n\t"</i> <a name=L33 href="source/kernel/printk.c#L33">33</a>                 <i>"pushl $_buf\n\t"</i> <a name=L34 href="source/kernel/printk.c#L34">34</a>                 <i>"pushl $0\n\t"</i> <a name=L35 href="source/kernel/printk.c#L35">35</a>                 <i>"call _tty_write\n\t"</i> <a name=L36 href="source/kernel/printk.c#L36">36</a>                 <i>"addl $8,%%esp\n\t"</i> <a name=L37 href="source/kernel/printk.c#L37">37</a>                 <i>"popl %0\n\t"</i> <a name=L38 href="source/kernel/printk.c#L38">38</a>                 <i>"pop %%fs"</i> <a name=L39 href="source/kernel/printk.c#L39">39</a>                 ::<i>"r"</i> (i):<i>"ax"</i>,<i>"cx"</i>,<i>"dx"</i>); <a name=L40 href="source/kernel/printk.c#L40">40</a>         return i; <a name=L41 href="source/kernel/printk.c#L41">41</a> } <a name=L42 href="source/kernel/printk.c#L42">42</a> </pre><hr><div align=center>   [<b><i>源代码浏览</i></b>] [<a href="diff/kernel/printk.c">区别标定</a>] [<a href="ident">标识符搜索</a>] [<a href="search">文本搜索</a>] [<a href="find">文件搜索</a>] </div><hr>本网页由 <a href="http:blurb.html">LXR引擎</a> 自动生成.<br></html>
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