博客园_Jerihttp://feed.cnblogs.com/blog/u/25449/rss2010-02-24T08:31:26ZJerihttp://www.cnblogs.com/jackxia/CNBlogs BlogServerhttp://www.cnblogs.com/jackxia/archive/2010/02/24/1672787.htmlKconfig文件的作用内核源码树的目录下都有两个文件Kconfig（2.4版本是Config.in）和Makefile。分布到各目录的Kconfig构成了一个分布式的内核配置数据库，每个Kconfig分别描述了所属目录源文件相关的内核配置菜单。在内核配置make menuconfig(或xconfig等)时，从Kconfig中读出菜单，用户选择后保存到.config的内核配置文件中。在内核编译时，主Makefile调用...2010-02-24T08:31:00Z2010-02-24T08:31:00ZJerihttp://www.cnblogs.com/jackxia/<p style="word-break: break-all"><span style="font-family: PMingLiU">内核源码树的目录下都有两个文件</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">（</span><span style="font-family: Arial">2.4</span><span style="font-family: PMingLiU">版本是</span><span style="font-family: Arial">Config.in</span><span style="font-family: PMingLiU">）和</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">。</span><span style="font-family: PMingLiU">分布到各目录的</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">构成了一个分布式的内核配置数据库，每个</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">分别描述了所属目录源文件相关的内核配置菜单。在内核配置</span><span style="font-family: Arial">make menuconfig(</span><span style="font-family: PMingLiU">或</span><span style="font-family: Arial">xconfig</span><span style="font-family: PMingLiU">等</span><span style="font-family: Arial">)</span><span style="font-family: PMingLiU">时，从</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">中读出菜单，用户选择后保存到</span><span style="font-family: Arial">.config</span><span style="font-family: PMingLiU">的内核配置文件中。在内核编译时，主</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">调用这个</span><span style="font-family: Arial">.config</span><span style="font-family: PMingLiU">，就知道了用户的选择。</span><span style="font-family: Arial"></span></p>
<p style="word-break: break-all"><span style="font-family: Arial">*</span><span style="font-family: PMingLiU">上面的内容说明了，</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">就是对应着内核的配置菜单。如果要想添加新的驱动到内核的源码中，可以修改</span><span style="font-family: Arial">Kconfig,</span><span style="font-family: PMingLiU">这样就可以选择这个驱动，如果想使这个驱动被编译，要修改</span><span style="font-family: Arial">Makefile</span></p>
<p style="word-break: break-all"><strong><span style="font-family: Arial">so</span></strong><strong><span style="font-family: PMingLiU">添加新的驱动时需要修改的文件有两种（注意不只是两个）</span></strong></p>
<p style="word-break: break-all"><strong><span style="font-family: Arial">*Kconfig</span></strong></p>
<p style="word-break: break-all"><strong><span style="font-family: Arial">*Makefile</span></strong></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">要想知道怎么修改这两种文件，就要知道两种文件的语法结构</span></p>
<p style="word-break: break-all"><strong><span style="font-family: Arial">Kconfig</span></strong></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">每个菜单都有一个关键字标识，最常见的就是</span><span style="font-family: Arial">config</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">语法：</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">config <symbol></span></p>
<p style="word-break: break-all"><span style="font-family: Arial"><config options></span></p>
<p style="word-break: break-all"><span style="font-family: Arial">symbol</span><span style="font-family: PMingLiU">是一个新的标记的菜单项，</span><span style="font-family: Arial">options</span><span style="font-family: PMingLiU">是在这个新的菜单项下的属性和选项</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">其中</span><span style="font-family: Arial">options</span><span style="font-family: PMingLiU">部分有：</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">1</span><span style="font-family: PMingLiU">、类型定义：</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">每个</span><span style="font-family: Arial">config</span><span style="font-family: PMingLiU">菜单项都要有类型定义，</span><span style="font-family: Arial">bool</span><span style="font-family: PMingLiU">布尔类型、</span><span style="font-family: Arial"> tristate</span><span style="font-family: PMingLiU">三态：内建、模块、移除</span><span style="font-family: Arial"> string</span><span style="font-family: PMingLiU">字符串、</span><span style="font-family: Arial"> hex</span><span style="font-family: PMingLiU">十六进制、</span><span style="font-family: Arial"> integer</span><span style="font-family: PMingLiU">整型</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">例如</span><span style="font-family: Arial">config HELLO_MODULE</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">bool "hello test module"</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">bool</span><span style="font-family: PMingLiU">类型的只能选中或不选中，</span><span style="font-family: Arial">tristate</span><span style="font-family: PMingLiU">类型的菜单项多了编译成内核模块的选项，如果选择编译成内核模块，则会在</span><span style="font-family: Arial">.config</span><span style="font-family: PMingLiU">中生成一个</span><span style="font-family: Arial">CONFIG_HELLO_MODULE=m</span><span style="font-family: PMingLiU">的配置，如果选择内建，就是直接编译成内核影响，就会在</span><span style="font-family: Arial">.config</span><span style="font-family: PMingLiU">中生成一个</span><span style="font-family: Arial">CONFIG_HELLO_MODULE=y</span><span style="font-family: PMingLiU">的配置</span><span style="font-family: Arial">.</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">2</span><span style="font-family: PMingLiU">、依赖型定义</span><span style="font-family: Arial">depends on</span><span style="font-family: PMingLiU">或</span><span style="font-family: Arial">requires</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">指此菜单的出现与否依赖于另一个定义</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">config HELLO_MODULE</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">bool "hello test module"</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">depends on ARCH_PXA</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">这个例子表明</span><span style="font-family: Arial">HELLO_MODULE</span><span style="font-family: PMingLiU">这个菜单项只对</span><span style="font-family: Arial">XScale</span><span style="font-family: PMingLiU">处理器有效。</span></p>
<p style="word-break: break-all"><span style="font-family: Arial">3</span><span style="font-family: PMingLiU">、帮助性定义</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">只是增加帮助用关键字</span><span style="font-family: Arial">help</span><span style="font-family: PMingLiU">或者</span><span style="font-family: Arial">---help---</span></p>
<p style="word-break: break-all"><strong><span style="font-family: Arial"> </span></strong><strong><span style="font-family: PMingLiU">内核的</span></strong><strong><span style="font-family: Arial">Makefile</span></strong></p>
<p style="word-break: break-all"></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">在</span><span style="font-family: Arial">linux2.6.x/Documentation/kbuild</span><span style="font-family: PMingLiU">目录下有详细的介绍有关</span><span style="font-family: Arial">kernel makefile</span><span style="font-family: PMingLiU">的知识。</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">内核的</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">分为</span><span style="font-family: Arial">5</span><span style="font-family: PMingLiU">个组成部分：</span><span style="font-family: Arial"> <br /><br />Makefile </span><span style="font-family: PMingLiU">最顶层的</span><span style="font-family: Arial">Makefile <br />.config </span><span style="font-family: PMingLiU">内核的当前配置文件，编译时成为定层</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">的一部分</span><span style="font-family: Arial"><br />arch/$(ARCH)/Makefile </span><span style="font-family: PMingLiU">与体系结构相关的</span><span style="font-family: Arial">Makefile <br />s/ Makefile.* </span><span style="font-family: PMingLiU">一些</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">的通用规则</span><span style="font-family: Arial"> <br />kbuild Makefile </span><span style="font-family: PMingLiU">各级目录下的大概约</span><span style="font-family: Arial">500</span><span style="font-family: PMingLiU">个文件，编译时根据上层</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">传下来的宏定义和其他编译规则，将源代码编译成模块或者编入内核</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">顶层的</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">文件读取</span><span style="font-family: Arial"> .config</span><span style="font-family: PMingLiU">文件的内容，并总体上负责</span><span style="font-family: Arial">build</span><span style="font-family: PMingLiU">内核和模块。</span><span style="font-family: Arial">Arch Makefile</span><span style="font-family: PMingLiU">则提供补充体系结构相关的信息。</span><span style="font-family: Arial"> s</span><span style="font-family: PMingLiU">目录下的</span><span style="font-family: Arial">Makefile</span><span style="font-family: PMingLiU">文件包含了所有用来根据</span><span style="font-family: Arial">kbuild Makefile </span><span style="font-family: PMingLiU">构建内核所需的定义和规则。</span></p>
<p style="word-break: break-all"><span style="font-family: PMingLiU">（其中</span><span style="font-family: Arial">.config</span><span style="font-family: PMingLiU">的内容是在</span><span style="font-family: Arial">make menuconfig</span><span style="font-family: PMingLiU">的时候，通过</span><span style="font-family: Arial">Kconfig</span><span style="font-family: PMingLiU">文件配置的结果</span><span style="font-family: 宋体">。</span></p>
<p style="word-break: break-all"><span style="font-family: 宋体">举个例子：</span></p>
<p style="word-break: break-all"><span style="font-family: Arial"> </span><span style="font-family: 宋体">假设想把自己写的一个</span><span style="font-family: Arial">flash</span><span style="font-family: 宋体">的驱动程序加载到工程中，而且能够通过</span><span style="font-family: Arial">menuconfig</span><span style="font-family: 宋体">配置内核时选择该驱动该怎么办呢？可以分三步：</span></p>
<p style="word-break: break-all"><span style="font-family: Arial"> </span><span style="font-family: 宋体">第一：将你写的</span><span style="font-family: Arial">flashtest.c </span><span style="font-family: 宋体">文件添加到</span><span style="font-family: Arial">/driver/mtd/maps/ </span><span style="font-family: 宋体">目录下。</span></p>
<p style="word-break: break-all"><span style="font-family: Arial"> </span><span style="font-family: 宋体">第二：修改</span><span style="font-family: Arial">/driver/mtd/maps</span><span style="font-family: 宋体">目录下的</span><span style="font-family: Arial">kconfig</span><span style="font-family: 宋体">文件：</span></p>
<p style="word-break: break-all"><span style="font-family: Arial"> <strong><em>config MTD_flashtest</em></strong></span></p>
<p style="word-break: break-all"><strong><em><span style="font-family: Arial"> tristate “ap71 flash"</span></em></strong></p>
<p style="word-break: break-all"><span style="font-family: Arial"> </span><span style="font-family: 宋体">这样当</span><span style="font-family: Arial">make menuconfig</span><span style="font-family: 宋体">时</span> <span style="font-family: 宋体">，将会出现</span><span style="font-family: Arial"> ap71 flash</span><span style="font-family: 宋体">选项。</span></p>
<p style="word-break: break-all"><span style="font-family: Arial"> </span><span style="font-family: 宋体">第三：修改该目录下</span><span style="font-family: Arial">makefile</span><span style="font-family: 宋体">文件。</span></p>
<p style="text-indent: -18pt; margin: 0cm 0cm 0pt 36pt; word-break: break-all"><span style="font-family: Wingdings">ü<span style="font: 7pt 'Times New Roman'"> </span></span><span style="font-family: Arial"> </span><span style="font-family: 宋体">添加如下内容：</span><strong><em><span style="font-family: Arial">obj-$(CONFIG_MTD_flashtest) += flashtest.o</span></em></strong></p><span style="font-family: Arial; font-size: 12pt"> </span><span style="font-family: 宋体; font-size: 12pt">这样，当你运行</span><span style="font-family: Arial; font-size: 12pt">make menucofnig</span><span style="font-family: 宋体; font-size: 12pt">时，你将发现</span><span style="font-family: Arial; font-size: 12pt">ap71 flash</span><span style="font-family: 宋体; font-size: 12pt">选项，如果你选择了此项。该选择就会保存在</span><span style="font-family: Arial; font-size: 12pt">.config</span><span style="font-family: 宋体; font-size: 12pt">文件中。当你编译内核时，将会读取</span><span style="font-family: Arial; font-size: 12pt">.config</span><span style="font-family: 宋体; font-size: 12pt">文件，当发现</span><span style="font-family: Arial; font-size: 12pt">ap71 flash </span><span style="font-family: 宋体; font-size: 12pt">选项为</span><span style="font-family: Arial; font-size: 12pt">yes </span><span style="font-family: 宋体; font-size: 12pt">时，系统在调用</span><span style="font-family: Arial; font-size: 12pt">/driver/mtd/maps/</span><span style="font-family: 宋体; font-size: 12pt">下的</span><span style="font-family: Arial; font-size: 12pt">makefile </span><span style="font-family: 宋体; font-size: 12pt">时，将会把</span><span style="font-family: Arial; font-size: 12pt"> flashtest.o </span><span style="font-family: 宋体; font-size: 12pt">加入到内核中。即可达到你的目的</span>。<img src="http://www.cnblogs.com/jackxia/aggbug/1672787.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/jackxia/archive/2010/02/24/1672787.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/jackxia/archive/2010/02/02/1661713.html转载goahead webserver源码分析1.一个txt文本架构图main() | |--websOpenServer() | |-- websOpenListen() | |--socketOpenConnection() | |--打开webServer服务器 | |--初化socket_t结构(注册websAccept()回调函数(socket_t sp->accept= websAccept)等) | |--把socket_...2010-02-02T05:07:00Z2010-02-02T05:07:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2010/01/20/1652169.htmlVista中使用netsh wlan命令行配置无线网络在Windows Vista中，我们可以使用图形界面设置定无线网络连接。然而，如何使用CLI命令行工具实现这一功能呢?本文将该命令的详细用法。 一、为什么要用命令行来配置无线网络? 既然有了GUI界面可以设置，为什么还需要用命令行工具来设置呢?有以下几个理由： ①当GUI界面不可用时，可以使用CLI界面——或许因为某种原因，造成GUI界面不可用，这时我...2010-01-20T02:52:00Z2010-01-20T02:52:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2010/01/15/1648251.htmlLinux操作系统下VI编辑器常用命令介绍一．简介 vi是unix世界中最通用的全屏编辑器，linux中是用的是vi的加强版vim,vim同vi完全兼容，vi就是"visual interface"的缩写。它可以执行输出、删除、查找、替换、块操作等众多文本操作，而且用户可以根据自己的需要对其进行定制，这是其它编辑程序所没有的。 vi不是一个排版程序，它不象Word或WPS那样可以对字体、格式、段落等其他属性进行编排，它只是一个文本...2010-01-15T00:52:00Z2010-01-15T00:52:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2009/07/18/1526092.html.net防注入铁盾--亲手教你ASP.NET中如何防止注入攻击你应该在程序中验证所有的不信任输入.你应该假定所有的用户输入都是非法的.用户可以在应用程序中提供表单字段,查询字串,客户端cookies和浏览器环境值比如用户代理字串和IP地址等. 弱输入校验通常为注入攻击提供了机会.下面是常见的利用弱输入校验或无输入校验进行攻击的手段. SQL 注入(SQL injection). 如果你使用用户的输入值来动态构造SQL语句,那么数据库可能执行攻击性的有害S...2009-07-18T03:32:00Z2009-07-18T03:32:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2009/05/25/1488626.htmlvs2005项模板和项目模板丢失的解决办法（转）文章来源：http://www.cnblogs.com/Randy0528/前段时间为了学习体验分布式三层架构，只得把中文版的ｖｓ２００５换成英文版的ｖｓ２００５，因为前者只能新建WebSite而不能新建Web Application,另外又安装一个Web Application Plug-in和中文的MSDN，由此折腾了好一阵子！ 开发OnLineExam的过程中，却发现找不到项目模板和项模...2009-05-25T01:06:00Z2009-05-25T01:06:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2009/05/19/1459958.htmlAsp.net(c#)导出有表格线的Excel表格用文件流的方式输出为excel。实例代码如下：[代码]这种方法的从本质上说并非标准的excel格式，不过把html格式的文件另存为excel的格式，然后用excel打开罢了。打开后会发现导出的excel无表格线，白白的一片，太难看了。通过分析excel的格式代码，我尝试在程序里增加带表格线的excel头部代码，结果顺利导出有表格线的excel.增加的代码如下：[代码][代码]2009-05-19T02:04:00Z2009-05-19T02:04:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2009/03/11/1409057.html对.NET的GC（垃圾回收）的理解都存在错误认识对.NET的GC（垃圾回收）的理解都存在错误。GC其实是相当复杂的系统，虽然95%的情况下我们并不需要考虑它，但仍有5%的情况我们不得不接触GC体系来解决问题。比如这个问题：void Func(){ A a = new A(); B b = new B(); a.RefToB = b; b.RefToA = a;}那么a和b会不会被GC回收？好几个人都答错。如果你按照COM的模式去思考GC，那就完...2009-03-11T12:24:00Z2009-03-11T12:24:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2009/02/18/1392982.htmlMSSQL如何快速清除数据库日志先提供一种复杂的方法压缩日志及数据库文件如下：1.清空日志 DUMP TRANSACTION 库名 WITH NO_LOG 2.截断事务日志： BACKUP LOG 数据库名 WITH NO_LOG3.收缩数据库文件(如果不压缩,数据库的文件不会减小 企业管理器--右键你要压缩的数据库--所有任务--收缩数据库--收缩文件 --选择日志文件--在收缩方式里选择收缩至XXM,这里会给出一个允...2009-02-18T03:09:00Z2009-02-18T03:09:00ZJerihttp://www.cnblogs.com/jackxia/http://www.cnblogs.com/jackxia/archive/2008/08/13/1267228.html数据库查询优化原则(转）1.对查询进行优化，应尽量避免全表扫描，首先应考虑在 where 及 order by 涉及的列上建立索引。 2.应尽量避免在 where 子句中对字段进行 null 值判断，否则将导致引擎放弃使用索引而进行全表扫描，如： select id from t where num is null 可以在num上设置默认值0，确保表中num列没有null值，然后这样查询： select id from ...2008-08-13T11:08:00Z2008-08-13T11:08:00ZJerihttp://www.cnblogs.com/jackxia/