{"id":903,"date":"2021-12-19T01:06:57","date_gmt":"2021-12-18T17:06:57","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=903"},"modified":"2022-12-06T19:59:33","modified_gmt":"2022-12-06T11:59:33","slug":"linux-kernel-labs-kernel-modules","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=903","title":{"rendered":"Linux Kernel Labs Kernel Modules"},"content":{"rendered":"\n<p>\u901a\u8fc7\u8fd9\u4e2a\u7ae0\u8282\u53ef\u4ee5\u5b66\u4e60\u5982\u4f55\u7f16\u5199\u5185\u6838\u6a21\u5757\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69f76bd96647c\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69f76bd96647c\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link 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href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E7%BC%96%E8%AF%91%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97\" >\u7f16\u8bd1\u5185\u6838\u6a21\u5757<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E5%AE%89%E8%A3%85%E4%B8%8E%E5%8D%B8%E8%BD%BD\" >\u5185\u6838\u6a21\u5757\u7684\u5b89\u88c5\u4e0e\u5378\u8f7d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E8%B0%83%E8%AF%95\" >\u5185\u6838\u6a21\u5757\u7684\u8c03\u8bd5<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E4%B8%A4%E7%A7%8D%E5%86%85%E6%A0%B8%E9%94%99%E8%AF%AF\" >\u4e24\u79cd\u5185\u6838\u9519\u8bef<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E4%B8%80%E4%BA%9B%E8%BE%85%E5%8A%A9%E8%B0%83%E8%AF%95%E7%9A%84%E4%BA%8C%E8%BF%9B%E5%88%B6%E5%B7%A5%E5%85%B7\" >\u4e00\u4e9b\u8f85\u52a9\u8c03\u8bd5\u7684\u4e8c\u8fdb\u5236\u5de5\u5177<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#minicom%E4%B8%8Enetconsole\" >minicom\u4e0enetconsole<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#printk\" >printk<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=903\/#%E7%BB%83%E4%B9%A0\" >\u7ec3\u4e60<\/a><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\" id=\"%E4%BF%9D%E6%8C%81%E5%86%85%E6%A0%B8%E4%BB%A3%E7%A0%81%E9%A3%8E%E6%A0%BC%E7%9A%84%E4%B8%80%E8%87%B4%E6%80%A7\"><span class=\"ez-toc-section\" id=\"%E4%BF%9D%E6%8C%81%E5%86%85%E6%A0%B8%E4%BB%A3%E7%A0%81%E9%A3%8E%E6%A0%BC%E7%9A%84%E4%B8%80%E8%87%B4%E6%80%A7\"><\/span>\u4fdd\u6301\u5185\u6838\u4ee3\u7801\u98ce\u683c\u7684\u4e00\u81f4\u6027<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p>\u8fd9\u662f\u8fd9\u4e2a\u6559\u7a0b\u4e2d\u6ca1\u6709\uff0c\u4f46\u662f\u6211\u8ba4\u4e3a\u4e5f\u6bd4\u8f83\u91cd\u8981\u7684\u4e1c\u897f\u3002\u7f16\u5199\u5185\u6838\u4ee3\u7801\u5e94\u8be5\u614e\u91cd\uff0c\u56e0\u4e3a\u9700\u8981\u5bf9\u6574\u4e2a\u7cfb\u7edf\u8d1f\u8d23\u3002\u5199\u51fa\u6765\u7684\u5185\u6838\u4ee3\u7801\u4e5f\u5e94\u5c3d\u91cf&#8221;\u6807\u51c6\u5316&#8221;\uff0c\u4e0d\u7136\u5927\u5bb6\u90fd\u5728\u63d0\u4ea4\u5185\u6838\u4ee3\u7801\uff0c\u90a3\u6700\u540e\u5185\u6838\u91cc\u4e0d\u540c\u6a21\u5757\u7684\u4ee3\u7801\u98ce\u683c\u8fe5\u5f02\uff0c\u770b\u8d77\u6765\u5c31\u4e71\u4e86\uff0c\u4e71\u4e86\u5c31\u5bb9\u6613\u51fa\u95ee\u9898\u3002\u5728Linux\u5185\u6838\u4ee3\u7801\u9876\u7ea7\u76ee\u5f55\u4e0b\u6709\u4e00\u4e2a*.clang-format*\u914d\u7f6e\u6587\u4ef6\uff0c\u91cc\u9762\u63cf\u8ff0\u4e86\u7528<a href=\"http:\/\/clang.llvm.org\/docs\/ClangFormat.html\">clang-format<\/a>\u5de5\u5177\u683c\u5f0f\u5316\u5185\u6838\u4ee3\u7801\u65f6\u6240\u4f7f\u7528\u7684\u914d\u7f6e\u3002\u5bf9\u4e8e\u4e60\u60ef\u7528vim\u7684\u4eba\u6765\u8bf4\uff0c\u6309\u7167<a href=\"https:\/\/github.com\/rhysd\/vim-clang-format\">\u8fd9\u4e2a\u63d2\u4ef6<\/a>\u914d\u7f6e\u4e00\u4e0b\u5c31\u53ef\u4ee5\u65b9\u4fbf\u7684\u7528clang-format\u683c\u5f0f\u5316\u4ee3\u7801\u4e86\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E4%BB%A3%E7%A0%81%E7%9A%84%E5%9F%BA%E6%9C%AC%E8%A6%81%E7%B4%A0\"><span class=\"ez-toc-section\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E4%BB%A3%E7%A0%81%E7%9A%84%E5%9F%BA%E6%9C%AC%E8%A6%81%E7%B4%A0\"><\/span>\u5185\u6838\u6a21\u5757\u4ee3\u7801\u7684\u57fa\u672c\u8981\u7d20<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E4%BB%A3%E7%A0%81%E6%A8%A1%E6%9D%BF\"><span class=\"ez-toc-section\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E4%BB%A3%E7%A0%81%E6%A8%A1%E6%9D%BF\"><\/span>\u5185\u6838\u6a21\u5757\u4ee3\u7801\u6a21\u677f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ece\u6a21\u4eff\u3001copy\u5f00\u59cb\u5b66\u4e60\u5199\u5185\u6838\u4ee3\u7801\uff0c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"c\" class=\"language-c\">#include &lt;linux\/kernel.h&gt;\n#include &lt;linux\/init.h&gt;\n#include &lt;linux\/module.h&gt;\n\nMODULE_DESCRIPTION(\"My kernel module\");\nMODULE_AUTHOR(\"Me\");\nMODULE_LICENSE(\"GPL\");\n\nstatic int dummy_init(void)\n{\n        pr_debug(\"Hi\\n\");\n        return 0;\n}\n\nstatic void dummy_exit(void)\n{\n        pr_debug(\"Bye\\n\");\n}\n\nmodule_init(dummy_init);\nmodule_exit(dummy_exit);\n<\/code><\/pre>\n\n\n\n<p>\u4ece\u4e0a\u9762\u7684\u5b9e\u4f8b\u4ee3\u7801\u53ef\u4ee5\u770b\u5230\uff0c\u5185\u6838\u6a21\u5757\u4ee3\u7801\u7684\u57fa\u672c\u7ec4\u6210\u90e8\u5206<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ee5*MODULE_*\u5f00\u5934\u7684\u58f0\u660e\n<ol class=\"wp-block-list\">\n<li>\u6a21\u5757\u63cf\u8ff0\u58f0\u660e\uff1b<\/li>\n\n\n\n<li>\u4f5c\u8005\u58f0\u660e(\u6709\u591a\u4e2a\u4f5c\u8005\u5c31\u591a\u5199\u51e0\u884c)\uff1b<\/li>\n\n\n\n<li>\u534f\u8bae\u58f0\u660e\uff1b<\/li>\n\n\n\n<li>\u7248\u672c\u58f0\u660e\uff1b<\/li>\n<\/ol>\n<\/li>\n\n\n\n<li>\u6a21\u5757\u6ce8\u518c\u51fd\u6570\u3001\u5378\u8f7d\u51fd\u6570<br>\u5206\u522b\u914d\u5408<em>module_init<\/em>\u548c<em>module_exit<\/em>\u4f7f\u7528\u3002\n<ol class=\"wp-block-list\">\n<li>\u6a21\u5757\u52a0\u8f7d\u51fd\u6570\u7684\u5b9e\u73b0\u5728\u52a0\u8f7d\u6210\u529f\u65f6\u8fd4\u56de0\uff0c\u5426\u5219\u8fd4\u56de\u5176\u4ed6\u503c\uff1b\u6a21\u5757\u5378\u8f7d\u51fd\u6570\u6ca1\u6709\u8fd4\u56de\u503c\uff1b<\/li>\n\n\n\n<li>\u6a21\u5757\u52a0\u8f7d\u51fd\u6570\u548c\u5378\u8f7d\u51fd\u6570\u90fd\u58f0\u660e\u4e3a<em>static<\/em>\uff0c\u9632\u6b62\u88ab\u5176\u4ed6\u6587\u4ef6\/\u6a21\u5757\u8c03\u7528\uff1b<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%E7%BC%96%E8%AF%91%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97\"><span class=\"ez-toc-section\" id=\"%E7%BC%96%E8%AF%91%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97\"><\/span>\u7f16\u8bd1\u5185\u6838\u6a21\u5757<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f16\u8bd1\u524d\u786e\u8ba4\u7f16\u8bd1\u5185\u6838\/\u5185\u6838\u6a21\u5757\u4ee3\u7801\u7684\u5de5\u5177\u7684\u7248\u672c\u90fd\u7b26\u5408\u8981\u6c42<br>\u5728linux\u4e2d\u7684<em>Documentation\/Changes<\/em>\u6709\u8bf4\u660e\u5bf9\u7f16\u8bd1\u5de5\u5177\u7248\u672c\u7684\u9700\u6c42<\/li>\n\n\n\n<li>\u7f16\u5199makefile<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u6765\u81eaLinux Device Driver 3rd edition\u7684makefile\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\"><em># Comment\/uncomment the following line to disable\/enable debugging<\/em>\n<em>#DEBUG = y<\/em>\n\n<em># Add your debugging flag (or not) to CFLAGS<\/em>\nifeq ($(DEBUG),y)\n  DEBFLAGS = -O -g <em># \"-O\" is needed to expand inlines<\/em>\nelse\n  DEBFLAGS = -O2\nendif\n\nCFLAGS += $(DEBFLAGS) -I$(LDDINCDIR)\n\nifneq ($(KERNELRELEASE),)\n<em># call from kernel build system<\/em>\n\nobj-m\t:= simple.o\n\nelse\n\nKERNELDIR ?= \/lib\/modules\/$(shell uname -r)\/build\nPWD       := $(shell pwd)\n\ndefault:\n\t$(MAKE) -C $(KERNELDIR) M=$(PWD) LDDINCDIR=$(PWD)\/..\/include modules\n\nendif\n\n\n\nclean:\n\trm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions\n\ndepend .depend dep:\n\t$(CC) $(CFLAGS) -M *.c &gt; .depend\n\n\nifeq (.depend,$(wildcard .depend))\ninclude .depend\nendif\n<\/code><\/pre>\n\n\n\n<p>\u5185\u6838\u6a21\u5757\u4ee3\u7801\u7684makefile\u5e76\u4e0d\u662f\u666e\u901a\u7684makefile\uff0c\u800c\u662f\u5185\u6838\u6784\u5efa\u7cfb\u7edf<a href=\"https:\/\/www.kernel.org\/doc\/Documentation\/kbuild\/makefiles.txt\">Kbuild<\/a>\u7684\u4e00\u90e8\u5206\u3002\u8fd9\u91cc\u53ea\u5bf9\u5185\u6838\u6a21\u5757\u4ee3\u7801makefile\u505a\u4e00\u4e9b\u5fc5\u8981\u7684\u89e3\u91ca\uff0c\u6709\u7a7a\u518d\u53bb\u7cfb\u7edf\u5b66\u4e60Kbuild\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9700\u8981\u76f8\u5e94\u7248\u672c\u7684\u6e90\u4ee3\u7801\u652f\u6301<br><code>$(MAKE) -C $(KERNELDIR) M=$(PWD) LDDINCDIR=$(PWD)\/..\/include modules<\/code>\u8fd9\u4e2a\u547d\u4ee4\u7684\u542b\u4e49\u662f\uff1a\n<ol class=\"wp-block-list\">\n<li>\u5148\u901a\u8fc7<code>-C<\/code>\u9009\u9879\u8fdb\u5165\u5230\u5185\u6838\u6e90\u7801\u6240\u5728\u76ee\u5f55\uff0c\u8bfb\u53d6linux\u6e90\u7801\u9876\u7ea7\u76ee\u5f55\u4e0b\u7684makefile\u6587\u4ef6\uff1b<\/li>\n\n\n\n<li>\u518d\u901a\u8fc7<code>M=$(PWD)<\/code>\u8fd4\u56de\u5f53\u524d\u76ee\u5f55\uff1b<\/li>\n\n\n\n<li>\u5f00\u59cb\u6784\u5efa\u76ee\u6807<em>modules<\/em><br><em>modules<\/em>\u76ee\u6807\u5373<code>obj-m<\/code>\u8fd9\u4e2a\u53d8\u91cf\u5305\u542b\u7684\u6240\u6709\u5185\u6838\u6a21\u5757\uff1b<\/li>\n<\/ol>\n<\/li>\n\n\n\n<li><code>obj-m<\/code>\u7684\u542b\u4e49<br>\u8868\u793a\u8981\u901a\u8fc7<code>simple.o<\/code>\u6587\u4ef6\u6784\u5efa\u5185\u6838\u6a21\u5757simple.ko<\/li>\n\n\n\n<li>\u5982\u679c\u8981\u6784\u5efa\u7684\u5185\u6838\u6a21\u5757\u5305\u542b\u591a\u4e2a\u6e90\u6587\u4ef6\u600e\u4e48\u529e<br><code>modulename-y = file1.o file2.o<\/code><br>\u6216\u8005<code>modulename-objs = file1.o file2.o<\/code><\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E5%AE%89%E8%A3%85%E4%B8%8E%E5%8D%B8%E8%BD%BD\"><span class=\"ez-toc-section\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E5%AE%89%E8%A3%85%E4%B8%8E%E5%8D%B8%E8%BD%BD\"><\/span>\u5185\u6838\u6a21\u5757\u7684\u5b89\u88c5\u4e0e\u5378\u8f7d<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b89\u88c5<br><code>insmod modulename.ko<\/code>\u6216\u8005<code>modprobe modulename.ko<\/code><br>\u4e24\u8005\u533a\u522b\u5728\u4e8e\u5bf9\u4e8emodulename.ko\u4e2d\u672a\u5b9a\u4e49\u7684\u5f15\u7528\uff0cmodprobe\u4f1a\u641c\u5bfb\u5176\u641c\u7d22\u8def\u5f84\u4e2d\u7684\u5176\u4ed6\u6a21\u5757\u662f\u5426\u6709\u5b9a\u4e49\u8fd9\u4e9b\u7b26\u53f7\uff0c\u5982\u679c\u6709\uff0c\u90a3\u4e48modprobe\u4f1a\u5148\u5b89\u88c5\u597d\u8fd9\u4e9b\u6a21\u5757(\u8fd9\u662f\u4e2a\u9012\u5f52\u7684\u8fc7\u7a0b)\u3002\u800cinsmod\u5219\u662f\u76f4\u63a5\u5b89\u88c5\u5931\u8d25\u3002<\/li>\n\n\n\n<li>\u5378\u8f7d&nbsp;<code>rmmode module.ko<\/code>\u6216\u8005<code>modprobe -r modulename.ko<\/code><br>\u53ea\u6709\u5185\u6838\u6a21\u5757\u7684\u4f7f\u7528\u8ba1\u6570\u4e3a0\u65f6\u624d\u5141\u8bb8\u5378\u8f7d\u8be5\u5185\u6838\u6a21\u5757<\/li>\n\n\n\n<li>\u67e5\u770b\u5df2\u7ecf\u5b89\u88c5\u7684\u5185\u6838\u6a21\u5757<br><code>lsmod<\/code><br>\u6700\u540e\u4e00\u5217\u4f1a\u663e\u793a\u8be5\u5185\u6838\u6a21\u5757\u7684\u4f7f\u7528\u8ba1\u6570<br>\u6216\u8005\u8003\u8651<code>cat \/proc\/modules<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u5f00\u673a\u542f\u52a8\u65f6\u5b89\u88c5\u5185\u6838\u6a21\u5757\uff1a<\/p>\n\n\n\n<p>boot\u65f6\u4f1a\u8fd0\u884c\/etc\/rcS.d\/S01kmod\u8fd9\u4e2a\u811a\u672c\u5b89\u88c5\u9700\u8981\u5728\u542f\u52a8\u65f6\u8fd0\u884c\u7684\u5185\u6838\u6a21\u5757\uff0c<\/p>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u6587\u4ef6\/etc\/modules-load.d\/modules.conf\u6dfb\u52a0\u9700\u8981\u5f00\u673a\u542f\u52a8\u5b89\u88c5\u7684\u5185\u6838\u6a21\u5757\uff0c<s>\u6216\u8005\u5c06ko\u6587\u4ef6\u653e\u5230\u76ee\u5f55\/etc\/modules-load.d\/\u91cc<\/s>\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E8%B0%83%E8%AF%95\"><span class=\"ez-toc-section\" id=\"%E5%86%85%E6%A0%B8%E6%A8%A1%E5%9D%97%E7%9A%84%E8%B0%83%E8%AF%95\"><\/span>\u5185\u6838\u6a21\u5757\u7684\u8c03\u8bd5<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%E4%B8%A4%E7%A7%8D%E5%86%85%E6%A0%B8%E9%94%99%E8%AF%AF\"><span class=\"ez-toc-section\" id=\"%E4%B8%A4%E7%A7%8D%E5%86%85%E6%A0%B8%E9%94%99%E8%AF%AF\"><\/span>\u4e24\u79cd\u5185\u6838\u9519\u8bef<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>kernel oops<\/strong><br>\u51fa\u73b0<em>kernel oops<\/em>\u65f6\u8868\u660e\u5185\u6838\u68c0\u6d4b\u5230\u51fa\u73b0\u9519\u8bef\uff0c\u4f46\u662f\u5185\u6838\u4e0d\u4f1a\u5d29\u6e83\uff0c\u8fd8\u53ef\u4ee5(\u52c9\u5f3a)\u7ee7\u7eed\u8fd0\u884c\u3002<\/li>\n\n\n\n<li><strong>kernel panic<\/strong><br>\u51fa\u73b0<em>kernel panic<\/em>\u540e\uff0c\u5185\u6838\u4e0d\u80fd\u7ee7\u7eed\u5b89\u5168\u8fd0\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"%E4%B8%80%E4%BA%9B%E8%BE%85%E5%8A%A9%E8%B0%83%E8%AF%95%E7%9A%84%E4%BA%8C%E8%BF%9B%E5%88%B6%E5%B7%A5%E5%85%B7\"><span class=\"ez-toc-section\" id=\"%E4%B8%80%E4%BA%9B%E8%BE%85%E5%8A%A9%E8%B0%83%E8%AF%95%E7%9A%84%E4%BA%8C%E8%BF%9B%E5%88%B6%E5%B7%A5%E5%85%B7\"><\/span>\u4e00\u4e9b\u8f85\u52a9\u8c03\u8bd5\u7684\u4e8c\u8fdb\u5236\u5de5\u5177<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"minicom%E4%B8%8Enetconsole\"><span class=\"ez-toc-section\" id=\"minicom%E4%B8%8Enetconsole\"><\/span>minicom\u4e0enetconsole<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"printk\"><span class=\"ez-toc-section\" id=\"printk\"><\/span>printk<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u7b80\u800c\u8a00\u4e4b\uff0c<strong>printk<\/strong>\u5c31\u662f\u5185\u6838\u91cc\u7684<strong>printf<\/strong>\uff0c\u53ea\u4e0d\u8fc7\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>printk<\/strong>\u9700\u8981\u6307\u5b9a\u8be5\u65e5\u5fd7\u7684\u7ea7\u522b\uff1b<\/li>\n\n\n\n<li><strong>printk<\/strong>\u7684\u8f93\u51fa\u5185\u5bb9\u9700\u8981\u7528<strong>dmesg<\/strong>\u67e5\u770b\uff0c\u6216\u8005\u67e5\u770b\u76f8\u5173\u6587\u4ef6(\u5982*\/var\/log\/syslog*)\uff1b<\/li>\n<\/ol>\n\n\n\n<p><em>printk<\/em>\u7684\u65e5\u5fd7\u7ea7\u522b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5b8f<\/th><th>\u4ee3\u8868\u7684\u6570\u5b57<\/th><\/tr><\/thead><tbody><tr><td><em>KERN_EMERG<\/em><\/td><td>0<\/td><\/tr><tr><td><em>KERN_ALERT<\/em><\/td><td>1<\/td><\/tr><tr><td><em>KERN_CRIT<\/em><\/td><td>2<\/td><\/tr><tr><td><em>KERN_ERR<\/em><\/td><td>3<\/td><\/tr><tr><td><em>KERN_WARNING<\/em><\/td><td>4<\/td><\/tr><tr><td><em>KERN_NOTICE<\/em><\/td><td>5<\/td><\/tr><tr><td><em>KERN_INFO<\/em><\/td><td>6<\/td><\/tr><tr><td><em>KERN_DEBUG<\/em><\/td><td>7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"%E7%BB%83%E4%B9%A0\"><span class=\"ez-toc-section\" id=\"%E7%BB%83%E4%B9%A0\"><\/span>\u7ec3\u4e60<span class=\"ez-toc-section-end\"><\/span><\/h1>\n","protected":false},"excerpt":{"rendered":"<p>\u901a\u8fc7\u8fd9\u4e2a\u7ae0\u8282\u53ef\u4ee5\u5b66\u4e60\u5982\u4f55\u7f16\u5199\u5185\u6838\u6a21\u5757\u3002 \u4fdd\u6301\u5185\u6838\u4ee3\u7801\u98ce\u683c\u7684\u4e00\u81f4\u6027 \u8fd9\u662f\u8fd9\u4e2a\u6559\u7a0b\u4e2d\u6ca1\u6709\uff0c\u4f46\u662f\u6211\u8ba4\u4e3a\u4e5f\u6bd4\u8f83\u91cd\u8981\u7684\u4e1c\u897f\u3002\u7f16\u5199\u5185\u6838\u4ee3\u7801\u5e94\u8be5\u614e\u91cd\uff0c\u56e0\u4e3a\u9700\u8981\u5bf9\u6574\u4e2a\u7cfb\u7edf\u8d1f\u8d23\u3002\u5199\u51fa\u6765\u7684\u5185\u6838\u4ee3\u7801\u4e5f\u5e94\u5c3d\u91cf&#8221;\u6807&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[37],"class_list":["post-903","post","type-post","status-publish","format-standard","hentry","category-10","tag-kernel"],"_links":{"self":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=903"}],"version-history":[{"count":2,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/903\/revisions"}],"predecessor-version":[{"id":1708,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/903\/revisions\/1708"}],"wp:attachment":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}