{"id":208360,"date":"2025-07-22T16:57:49","date_gmt":"2025-07-22T08:57:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/?p=208360"},"modified":"2025-07-22T16:57:49","modified_gmt":"2025-07-22T08:57:49","slug":"linux%e9%a9%85%e5%8b%95%e9%96%8b%e7%99%bc%e5%9f%ba%e7%a4%8e%ef%bc%9a%e5%9f%ba%e6%96%bcgoldfish%e5%85%a7%e6%a0%b8%e7%9a%84%e5%af%a6%e8%b8%90%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208360\/","title":{"rendered":"Linux\u9a45\u52d5\u958b\u767c\u57fa\u790e\uff1a\u57fa\u65bcgoldfish\u5167\u6838\u7684\u5be6\u8e10\u6307\u5357"},"content":{"rendered":"<h4><strong>1 \u6280\u8853\u80cc\u666f<\/strong><\/h4>\n<p class=\"ds-markdown-paragraph\">\u5728Linux\u7cfb\u7d71\u4e2d\uff0c\u5167\u6838\u8ca0\u8cac\u6838\u5fc3\u8cc7\u6e90\u7ba1\u7406\uff08CPU\u8abf\u5ea6\u3001\u8a18\u61b6\u9ad4\u7ba1\u7406\u3001\u88dd\u7f6e\u63a7\u5236\u7b49\uff09\uff0c\u4f7f\u7528\u8005\u7a7a\u9593\u900f\u904e\u7cfb\u7d71\u547c\u53eb\u8207\u5167\u6838\u4e92\u52d5\u3002\u5167\u6838\u6a21\u7d44\u662f\u52d5\u614b\u64f4\u5c55\u6a5f\u5236\uff0c\u5141\u8a31\u57f7\u884c\u6642\u52a0\u8f09\u529f\u80fd\uff0c\u800c\u9a45\u52d5\u4f5c\u70ba\u7279\u6b8a\u7684\u5167\u6838\u6a21\u7d44\uff0c\u5c08\u9580\u7ba1\u7406\u786c\u9ad4\u88dd\u7f6e\uff08\u5982\u5b57\u5143\u88dd\u7f6e\u3001\u5340\u584a\u88dd\u7f6e\u3001\u7db2\u8def\u88dd\u7f6e\uff09\u3002\u672c\u6587\u57fa\u65bcgoldfish\u5167\u6838\u74b0\u5883\uff0c\u6f14\u793a\u9a45\u52d5\u958b\u767c\u5168\u6d41\u7a0b\uff0c\u9069\u7528\u65bc\u5404\u985e\u4f3a\u670d\u5668\u74b0\u5883\uff08\u5305\u62ec<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u6216<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9999\u6e2f\u96f2\u7aef\u4f3a\u670d\u5668<\/a>\u7684\u6e2c\u8a66\u90e8\u7f72\u3002<\/p>\n<hr \/>\n<h4><strong>2 \u5167\u6838\u6a21\u7d44\u958b\u767c<\/strong><\/h4>\n<p class=\"ds-markdown-paragraph\"><strong>2.1 \u6700\u5c0f\u6a21\u7d44\u5be6\u73fe<\/strong><br \/>\n\u5167\u6838\u6a21\u7d44\u9700\u5b9a\u7fa9\u521d\u59cb\u5316\/\u6e05\u7406\u51fd\u6578\uff0c\u4e26\u900f\u904e<code>module_init<\/code>\/<code>module_exit<\/code>\u8a3b\u518a\uff1a<\/p>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span class=\"token directive-hash\" style=\"font-family: Consolas, Monaco, monospace;\">#<\/span><span class=\"token directive keyword\" style=\"font-family: Consolas, Monaco, monospace;\">include<\/span> <span class=\"token string\" style=\"font-family: Consolas, Monaco, monospace;\">&lt;linux\/init.h&gt;<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/module.h&gt;<\/span>  <\/span>\r\n\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> __init <span class=\"token function\">hello_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"hello_kernel: Module loaded\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  \r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token punctuation\">}<\/span>  \r\n\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> __exit <span class=\"token function\">hello_exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token function\">printk<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"hello_kernel: Module unloaded\\n\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token punctuation\">}<\/span>  \r\n\r\n<span class=\"token function\">module_init<\/span><span class=\"token punctuation\">(<\/span>hello_init<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token function\">module_exit<\/span><span class=\"token punctuation\">(<\/span>hello_exit<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token function\">MODULE_LICENSE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"GPL\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/pre>\n<\/div>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>__init<\/code>\/<code>__exit<\/code>\u5b8f\u512a\u5316\u8a18\u61b6\u9ad4\uff1a\u521d\u59cb\u5316\u7a0b\u5f0f\u78bc\u57f7\u884c\u5f8c\u81ea\u52d5\u91cb\u653e\u3002<\/p>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\"><strong>2.2 \u7de8\u8b6f\u8207\u52a0\u8f09<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7de8\u8b6f\u9032\u5167\u6838<\/strong>\uff1a<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u5c07\u7a0b\u5f0f\u78bc\u7f6e\u65bc<code>drivers\/misc\/demo\/<\/code>\uff0c\u914d\u7f6e<code>Kconfig<\/code>\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>config HELLO_KERNEL  \r\n    tristate \"Hello kernel\"  \r\n    default y<\/pre>\n<\/div>\n<ol start=\"2\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u4fee\u6539<code>drivers\/misc\/Makefile<\/code>\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>obj-$(CONFIG_HELLO_KERNEL) += demo\/<\/pre>\n<\/div>\n<ol start=\"3\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u91cd\u65b0\u7de8\u8b6f\u5167\u6838\uff1a<code>make<\/code>\uff0c\u751f\u6210<code>bzImage<\/code>\u3002<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7de8\u8b6f\u70ba\u6a21\u7d44<\/strong>\uff1a<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u8a2d\u5b9a<code>default m<\/code>\uff0c\u57f7\u884c\u6a21\u7d44\u7de8\u8b6f\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre><span class=\"token function\">make<\/span> <span class=\"token assign-left variable\">M<\/span><span class=\"token operator\">=<\/span>drivers\/misc\/demo modules  <span class=\"token comment\"># \u751f\u6210hello_kernel.ko  <\/span><\/pre>\n<\/div>\n<ol start=\"2\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u63a8\u9001\u5230\u88dd\u7f6e\u4e26\u52a0\u8f09\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>adb push hello_kernel.ko \/data\/local\/tmp\/  \r\nadb shell insmod \/data\/local\/tmp\/hello_kernel.ko<\/pre>\n<\/div>\n<ol start=\"3\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u9a57\u8b49\u65e5\u8a8c\uff1a<code>dmesg | grep hello_kernel<\/code>\u3002<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<hr \/>\n<h4><strong>3 \u9a45\u52d5\u958b\u767c\u5be6\u8e10\uff1a\u5b57\u5143\u88dd\u7f6e<\/strong><\/h4>\n<p class=\"ds-markdown-paragraph\"><strong>3.1 \u96dc\u9805\u88dd\u7f6e\u9a45\u52d5\uff08miscdevice\uff09<\/strong><br \/>\n\u5229\u7528\u56fa\u5b9a\u4e3b\u88dd\u7f6e\u865f\uff0810\uff09\uff0c\u7c21\u5316\u5b57\u5143\u88dd\u7f6e\u958b\u767c\uff1a<\/p>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span class=\"token directive-hash\" style=\"font-family: Consolas, Monaco, monospace;\">#<\/span><span class=\"token directive keyword\" style=\"font-family: Consolas, Monaco, monospace;\">include<\/span> <span class=\"token string\" style=\"font-family: Consolas, Monaco, monospace;\">&lt;linux\/miscdevice.h&gt;<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;linux\/fs.h&gt;<\/span>  <\/span>\r\n\r\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">DEVICE_NAME<\/span> <span class=\"token string\">\"hello_device\"<\/span>  <\/span>\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">char<\/span> str_buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">128<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token keyword\">static<\/span> <span class=\"token class-name\">size_t<\/span> str_len<span class=\"token punctuation\">;<\/span>  \r\n\r\n<span class=\"token comment\">\/\/ \u6a94\u6848\u64cd\u4f5c\u4ecb\u9762  <\/span>\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">file_operations<\/span> hello_fops <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>owner <span class=\"token operator\">=<\/span> THIS_MODULE<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>open <span class=\"token operator\">=<\/span> hello_open<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>release <span class=\"token operator\">=<\/span> hello_release<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>read <span class=\"token operator\">=<\/span> hello_read<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>write <span class=\"token operator\">=<\/span> hello_write<span class=\"token punctuation\">,<\/span>  \r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>  \r\n\r\n<span class=\"token comment\">\/\/ \u8a3b\u518a\u96dc\u9805\u88dd\u7f6e  <\/span>\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">miscdevice<\/span> hello_misc <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>minor <span class=\"token operator\">=<\/span> MISC_DYNAMIC_MINOR<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">=<\/span> DEVICE_NAME<span class=\"token punctuation\">,<\/span>  \r\n    <span class=\"token punctuation\">.<\/span>fops <span class=\"token operator\">=<\/span> <span class=\"token operator\">&amp;<\/span>hello_fops<span class=\"token punctuation\">,<\/span>  \r\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>  \r\n\r\n<span class=\"token comment\">\/\/ \u521d\u59cb\u5316\uff08\u52a0\u8f09\u9a45\u52d5\uff09  <\/span>\r\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> __init <span class=\"token function\">hello_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token function\">misc_register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>hello_misc<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5efa\u7acb\u88dd\u7f6e\u7bc0\u9ede\/dev\/hello_device  <\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>  \r\n<span class=\"token punctuation\">}<\/span><\/pre>\n<\/div>\n<p class=\"ds-markdown-paragraph\"><strong>\u95dc\u9375\u51fd\u6578\u8aaa\u660e<\/strong>\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>copy_from_user()<\/code>: \u4f7f\u7528\u8005\u7a7a\u9593\u2192\u5167\u6838\u7a7a\u9593\u8cc7\u6599\u50b3\u8f38\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>copy_to_user()<\/code>: \u5167\u6838\u7a7a\u9593\u2192\u4f7f\u7528\u8005\u7a7a\u9593\u8cc7\u6599\u50b3\u8f38\u3002<\/p>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\"><strong>3.2 \u6e2c\u8a66\u8207\u9a57\u8b49<\/strong><\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7d42\u7aef\u8b80\u5beb\u6e2c\u8a66<\/strong>\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span class=\"token builtin class-name\" style=\"font-family: Consolas, Monaco, monospace;\">echo<\/span> <span class=\"token string\" style=\"font-family: Consolas, Monaco, monospace;\">&#8220;test&#8221;<\/span> <span class=\"token operator\" style=\"font-family: Consolas, Monaco, monospace;\">&gt;<\/span><span style=\"font-family: Consolas, Monaco, monospace;\"> \/dev\/hello_device <\/span><span class=\"token comment\" style=\"font-family: Consolas, Monaco, monospace;\"># \u89f8\u767cwrite()\u00a0\u00a0<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre><span class=\"token function\">cat<\/span> \/dev\/hello_device            <span class=\"token comment\"># \u89f8\u767cread()  <\/span><\/pre>\n<\/div>\n<ol start=\"2\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\u5c64\u8b80\u5beb\uff08Android\u7bc4\u4f8b\uff09<\/strong>\uff1a<\/p>\n<\/li>\n<\/ol>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span class=\"token keyword\" style=\"font-family: Consolas, Monaco, monospace;\">fun<\/span> <span class=\"token function\" style=\"font-family: Consolas, Monaco, monospace;\">writeToDevice<\/span><span class=\"token punctuation\" style=\"font-family: Consolas, Monaco, monospace;\">(<\/span><span class=\"token keyword\" style=\"font-family: Consolas, Monaco, monospace;\">data<\/span><span class=\"token operator\" style=\"font-family: Consolas, Monaco, monospace;\">:<\/span><span style=\"font-family: Consolas, Monaco, monospace;\"> String<\/span><span class=\"token punctuation\" style=\"font-family: Consolas, Monaco, monospace;\">)<\/span> <span class=\"token punctuation\" style=\"font-family: Consolas, Monaco, monospace;\">{<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>    <span class=\"token function\">FileOutputStream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal singleline\"><span class=\"token string\">\"\/dev\/hello_device\"<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">use<\/span> <span class=\"token punctuation\">{<\/span> it<span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">data<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toByteArray<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span>  \r\n<span class=\"token punctuation\">}<\/span>  \r\n<span class=\"token keyword\">fun<\/span> <span class=\"token function\">readFromDevice<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> String <span class=\"token punctuation\">{<\/span>  \r\n    <span class=\"token keyword\">return<\/span> <span class=\"token function\">FileInputStream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-literal singleline\"><span class=\"token string\">\"\/dev\/hello_device\"<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  \r\n<span class=\"token punctuation\">}<\/span><\/pre>\n<\/div>\n<blockquote>\n<p class=\"ds-markdown-paragraph\"><strong>\u6b0a\u9650\u8655\u7406<\/strong>\uff1a<\/p>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span class=\"token function\" style=\"font-family: Consolas, Monaco, monospace;\">chmod<\/span> <span class=\"token number\" style=\"font-family: Consolas, Monaco, monospace;\">666<\/span><span style=\"font-family: Consolas, Monaco, monospace;\"> \/dev\/hello_device <\/span><span class=\"token comment\" style=\"font-family: Consolas, Monaco, monospace;\"># \u958b\u653e\u8b80\u5beb\u6b0a\u9650\u00a0\u00a0<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>setenforce <span class=\"token number\">0<\/span>                 <span class=\"token comment\"># \u95dc\u9589SELinux\uff08\u6e2c\u8a66\u74b0\u5883\uff09  <\/span><\/pre>\n<\/div>\n<\/blockquote>\n<hr \/>\n<h4><strong>4 \u90e8\u7f72\u8207\u5834\u666f\u61c9\u7528<\/strong><\/h4>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6e2c\u8a66\u74b0\u5883<\/strong>\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u4f7f\u7528Android\u6a21\u64ec\u5668\u52a0\u8f09goldfish\u5167\u6838\uff1a<\/p>\n<\/li>\n<\/ul>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>emulator <span class=\"token parameter variable\">-avd<\/span> Pixela10 <span class=\"token parameter variable\">-kernel<\/span> arch\/x86_64\/boot\/bzImage<\/pre>\n<\/div>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u751f\u7522\u74b0\u5883<\/strong>\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u9a45\u52d5\u53ef\u90e8\u7f72\u65bc\u5404\u985e\u96f2\u7aef\u670d\u52d9\u74b0\u5883\uff0c\u5982<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u70ba\u786c\u9ad4\u88dd\u7f6e\u63d0\u4f9b\u5e95\u5c64\u652f\u63f4\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6280\u8853\u50f9\u503c<\/strong>\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u9075\u5faa\u300c\u4e00\u5207\u7686\u6a94\u6848\u300d\u7406\u5ff5\uff0c\u900f\u904e<code>\/dev<\/code>\u7bc0\u9ede\u7d71\u4e00\u7ba1\u7406\u786c\u9ad4\uff08\u5982\u5e8f\u5217\u57e0\u88dd\u7f6e<code>\/dev\/ttyS0<\/code>\u3001Binder\u9a45\u52d5<code>\/dev\/binder<\/code>\uff09\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4><strong>5 \u7e3d\u7d50<\/strong><\/h4>\n<p class=\"ds-markdown-paragraph\">\u672c\u6587\u900f\u904egoldfish\u5167\u6838\u74b0\u5883\u5b8c\u6210\uff1a<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5167\u6838\u6a21\u7d44<\/strong>\uff1a\u5be6\u73fe\u52d5\u614b\u52a0\u8f09\/\u5378\u8f09\u7684<code>hello_kernel<\/code>\u6a21\u7d44\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5b57\u5143\u88dd\u7f6e\u9a45\u52d5<\/strong>\uff1a\u958b\u767c\u652f\u63f4\u8b80\u5beb\u64cd\u4f5c\u7684\u96dc\u9805\u88dd\u7f6e<code>\/dev\/hello_device<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u8de8\u7a7a\u9593\u901a\u8a0a<\/strong>\uff1a\u4f7f\u7528<code>copy_from_user<\/code>\/<code>copy_to_user<\/code>\u5b89\u5168\u50b3\u8f38\u8cc7\u6599\u3002<br \/>\n\u5f8c\u7e8c\u53ef\u64f4\u5c55\u81f3\u771f\u5be6\u786c\u9ad4\u9a45\u52d5\u958b\u767c\uff0c\u9069\u7528\u65bc\u96f2\u7aef\u74b0\u5883\uff08\u5982<a href=\"https:\/\/server.hk\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u9999\u6e2f\u96f2\u7aef\u4f3a\u670d\u5668<\/a>\uff09\u7684\u5ba2\u88fd\u5316\u90e8\u7f72\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p class=\"ds-markdown-paragraph\"><strong>\u9644\uff1a\u9a45\u52d5\u4e92\u52d5\u6642\u5e8f<\/strong><\/p>\n<div class=\"md-code-block md-code-block-light\">\n<div class=\"md-code-block-banner-wrap\">\n<div class=\"md-code-block-banner md-code-block-banner-lite\">\n<div class=\"_121d384\">\n<div class=\"d2a24f03\">\n<div class=\"efa13877\">\n<div class=\"ds-button ds-button--secondary ds-button--borderless ds-button--rect ds-button--s _7db3914\" tabindex=\"0\" role=\"button\"><span style=\"font-family: Consolas, Monaco, monospace;\">\u4f7f\u7528\u8005\u7a7a\u9593write() \u2192 \u7cfb\u7d71\u547c\u53eb \u2192 VFS \u2192 hello_write() \u2192 copy_from_user()\u00a0\u00a0<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<pre>\u4f7f\u7528\u8005\u7a7a\u9593read()  \u2192 \u7cfb\u7d71\u547c\u53eb \u2192 VFS \u2192 hello_read()  \u2192 copy_to_user()<\/pre>\n<\/div>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>1 \u6280\u8853\u80cc\u666f \u5728Linux\u7cfb\u7d71\u4e2d&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-208360","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208360","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208360"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208360\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}