\u5b66\u4e60\u5185\u6838\u6a21\u5757\u7f16\u7a0b\uff0c\u7b2c\u4e00\u4e2a\u5c0f\u7a0b\u5e8f\u5f53\u7136\u662fhello,kernel\uff01\u4e86\uff0c\u8fd9\u5e94\u5f53\u7b97\u662f\u4e00\u4e2a\u60ef\u4f8b\u4e86\u3002\u4ee5\u524d\u5927\u4e09\u7684\u65f6\u5019\u5728\u5b9e\u9a8c\u8bfe\u4e0a\u505a\u8fc7\u6a21\u5757\u7f16\u7a0b\uff0c\u8bb0\u5f97\u5f53\u65f6\u8fd8\u662f\u8bb8\u5e08\u5144\u5e26\u6211\u4eec\u7684\u5b9e\u9a8c\uff0c\u4e0d\u8fc7\u73b0\u5728\u53c8\u5fd8\u4e86\u3002\u665a\u4e0a\u8bd5\u4e86\u8bd5\uff0c\u5f88\u5feb\u5c31\u8fd0\u884c\u6210\u529f\u4e86\uff0c\u4e0d\u8fc7\u8fd8\u662f\u51fa\u73b0\u4e86\u4e00\u4e9b\u95ee\u9898\u3002\u73b0\u5728\u5c06\u6211\u7684\u6b65\u9aa4\u8bb0\u5f55\u5982\u4e0b\uff0c\u4f9b\u548c\u6211\u4e00\u6837\u7684\u521d\u5b66\u8005\u5b66\u4e60\u3002<\/p>\n
1.\u9996\u5148\u7f16\u5199hello.c\u6587\u4ef6<\/p>\n
#include <linux\/init.h>\r\n#include <linux\/module.h>\r\n#include <linux\/kernel.h>\r\n\/\/\u5fc5\u9009\r\n\/\/\u6a21\u5757\u8bb8\u53ef\u58f0\u660e\r\nMODULE_LICENSE(\"GPL\");\r\n\/\/\u6a21\u5757\u52a0\u8f7d\u51fd\u6570\r\nstatic int hello_init(void)\r\n{\r\n\tprintk(KERN_ALERT \"hello,I am edsionte\\n\");\r\n\treturn 0;\r\n}\r\n\/\/\u6a21\u5757\u5378\u8f7d\u51fd\u6570\r\nstatic void hello_exit(void)\r\n{\r\n\tprintk(KERN_ALERT \"goodbye,kernel\\n\");\r\n}\r\n\/\/\u6a21\u5757\u6ce8\u518c\r\nmodule_init(hello_init);\r\nmodule_exit(hello_exit);\r\n\/\/\u53ef\u9009\r\nMODULE_AUTHOR(\"edsionte Wu\");\r\nMODULE_DESCRIPTION(\"This is a simple example!\\n\");\r\nMODULE_ALIAS(\"A simplest example\");<\/pre>\n\u901a\u5e38\u4e00\u4e2a\u6a21\u5757\u7a0b\u5e8f\u7684\u4e2d\uff0c\u6a21\u5757\u52a0\u8f7d\u51fd\u6570\uff0c\u6a21\u5757\u5378\u8f7d\u51fd\u6570\u4ee5\u53ca\u6a21\u5757\u8bb8\u53ef\u58f0\u660e\u662f\u5fc5\u987b\u6709\u7684\uff0c\u800c\u8c61\u6a21\u5757\u53c2\u6570\uff0c\u6a21\u5757\u5bfc\u51fa\u7b26\u53f7\u4ee5\u53ca\u6a21\u5757\u4f5c\u8005\u4fe1\u606f\u58f0\u660e\u7b49\u90fd\u662f\u53ef\u9009\u7684\u3002<\/p>\n
\u6211\u4eec\u7f16\u5199\u4e86\u6a21\u5757\u52a0\u8f7d\u51fd\u6570\u540e\uff0c\u8fd8\u5fc5\u987b\u7528module_init(mode_name);\u7684\u5f62\u5f0f\u6ce8\u518c\u8fd9\u4e2a\u51fd\u6570\u3002\u56e0\u4e3a\u5f53\u6211\u4eec\u63a5\u4e0b\u6765\u7528insmod\u52a0\u8f7d\u6a21\u5757\u65f6\uff0c\u5185\u6838\u4f1a\u81ea\u52a8\u53bb\u5bfb\u627e\u5e76\u6267\u884c\u5185\u6838\u52a0\u8f7d\u51fd\u6570\uff0c\u5b8c\u6210\u4e00\u4e9b\u521d\u59cb\u5316\u5de5\u4f5c\u3002\u7c7b\u4f3c\u7684\u5f53\u6211\u4eec\u4f7f\u7528rmmod\u547d\u4ee4\u65f6\uff0c\u5185\u6838\u4f1a\u81ea\u52a8\u53bb\u6267\u884c\u5185\u6838\u5378\u8f7d\u51fd\u6570\u3002<\/p>\n
\u8bf7\u6ce8\u610f\u8fd9\u91cc\u7684printk\u51fd\u6570\uff0c\u53ef\u4ee5\u7b80\u5355\u7684\u7406\u89e3\u4e3a\u5b83\u662f\u5185\u6838\u4e2d\u7684printf\u51fd\u6570\uff0c\u521d\u6b21\u4f7f\u7528\u5f88\u5bb9\u6613\u5c06\u5176\u6253\u6210printf\u3002<\/p>\n
2.\u7f16\u5199Makefile\u6587\u4ef6<\/p>\n
\u8bb0\u5f97\u5927\u4e09\uff0c\u90a3\u65f6\u5019\u5b9e\u9a8c\u8bfe\u4e0a\u63a5\u89e6\u5230Makefile\uff0c\u53ea\u662f\u6309\u7167\u4e66\u4e0a\u7684\u5185\u5bb9\u6572\u4e0a\u53bb\u3002\u4e0d\u8fc7\u6709\u4e86\u4e0a\u4e00\u5468\u5bf9Makefile\u76f8\u5173\u8bed\u6cd5\u7684\u4e86\u89e3\uff0c\u73b0\u5728\u770b\u8d77\u6765\u5df2\u7ecf\u57fa\u672c\u77e5\u9053\u4e3a\u4ec0\u4e48\u8981\u8fd9\u4e48\u5199\u4e86\u3002\u90a3\u4e48\u4e0b\u9762\u6211\u4eec\u770bMakefile\u6587\u4ef6\u3002<\/p>\n
obj-m += hello.o\r\n#generate the path\r\nCURRENT_PATH:=$(shell pwd)\r\n#the current kernel version number\r\nLINUX_KERNEL:=$(shell uname -r)\r\n#the absolute path\r\nLINUX_KERNEL_PATH:=\/usr\/src\/linux-headers-$(LINUX_KERNEL)\r\n#complie object\r\nall:\r\n\tmake -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules\r\n#clean\r\nclean:\r\n\tmake -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean<\/pre>\n\u9996\u5148\u7b2c\u4e00\u53e5\u8bdd\u6307\u5b9a\u8981\u88ab\u7f16\u8bd1\u7684\u6587\u4ef6\u3002\u5176\u5b9eMakefile\u4e2d\u6709\u8fd9\u6837\u4e00\u53e5\u8bdd\u5c31\u53ef\u4ee5\u4e86\uff0c\u4f46\u662f\u8fd9\u6837\u7684\u8bdd\u6bcf\u6b21make\u65f6\u90fd\u8981\u52a0\u5165\u5176\u4ed6\u547d\u4ee4\uff0c\u6240\u4ee5\u6211\u4eec\u4e0d\u59a8\u5c31\u5728Make\u4e2d\u52a0\u5165\u6bcf\u6b21\u8981\u6267\u884c\u7684\u547d\u4ee4\uff08\u811a\u672c\u8bed\u8a00\u7684\u529f\u80fd\u4f53\u73b0\u51fa\u6765\u4e86\uff09\u3002\u6bcf\u6b21\u53ea\u8981\u8f93\u5165make\u547d\u4ee4\u5373\u53ef\u3002<\/p>\n
\u6211\u4eec\u9996\u5148\u83b7\u5f97\u5f53\u524d\u7684\u76f8\u5bf9\u8def\u5f84\uff08\u4f60\u53ef\u4ee5\u5728\u7ec8\u7aef\u8f93\u5165pwd\u8bd5\u4e00\u4e0b\u8fd9\u4e2a\u547d\u4ee4\uff09\uff0c\u7136\u540e\u518d\u83b7\u5f97\u5f53\u524d\u5185\u6838\u7684\u7248\u672c\u53f7\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u76f4\u63a5\u83b7\u5f97\u5f53\u524d\u5185\u6838\u7684\u7edd\u5bf9\u8def\u5f84\u3002\u5f53\u7136\u4f60\u53ef\u4ee5\u76f4\u63a5\u8f93\u5165\u5f53\u524d\u5185\u6838\u7248\u672c\uff0c\u4e0d\u8fc7\u8fd9\u6837\u4e0d\u65b9\u4fbf\u79fb\u690d\uff0c\u5982\u679c\u5f53\u524d\u5185\u6838\u7248\u672c\u53f7\u4e0e\u6b64\u6587\u4ef6\u4e2d\u7684\u7248\u672c\u53f7\u4e0d\u540c\u65f6\uff0c\u5c31\u5f97\u4fee\u6539\u3002\u6240\u4ee5\u4e0a\u9762\u7684\u65b9\u6cd5\u6709\u5f88\u597d\u7684\u79fb\u690d\u6027\uff0c\u800c\u4e14\u53ef\u8bfb\u6027\u4e5f\u5f3a\u3002<\/p>\n
\u8fd9\u91cc\u4f1a\u7ecf\u5e38\u51fa\u73b0$(variable name)\u8fd9\u6837\u7684\u5b57\u7b26\u4e32\uff0c\u5176\u5b9e\u8fd9\u662f\u5bf9\u62ec\u53f7\u5185\u53d8\u91cf\u7684\u4e00\u79cd\u5f15\u7528\uff0c\u5177\u4f53\u53ef\u53c2\u8003Makefile\u7684\u76f8\u5173\u8bed\u6cd5\u89c4\u5219\u3002<\/p>\n
3.make<\/p>\n
\u5b8c\u6210\u4e0a\u8ff0\u4e24\u4e2a\u6587\u4ef6\u540e\uff0c\u5728\u5f53\u524d\u76ee\u5f55\u4e0b\u8fd0\u884cmake\u547d\u4ee4\uff0c\u5c31\u4f1a\u751f\u6210hello.ko\u6587\u4ef6\uff0c\u5373\u6a21\u5757\u76ee\u6807\u6587\u4ef6\u3002<\/p>\n
4.insmod,rmmod\u548cdmesg<\/p>\n
insmod\u547d\u4ee4\u53ef\u4ee5\u4f7f\u6211\u4eec\u5199\u7684\u8fd9\u4e2a\u6a21\u5757\u52a0\u5165\u5230\u5185\u6838\u4e2d\uff0c\u4f46\u662f\u4e00\u822c\u6211\u4eec\u8981\u52a0\u4e0asudo\u3002rmmod\u5f53\u7136\u5c31\u662f\u5378\u8f7d\u8fd9\u4e2a\u6a21\u5757\u4e86\u3002\u6211\u4eec\u5728\u52a0\u8f7d\u6216\u5378\u8f7d\u6a21\u5757\u65f6\u90fd\u6709\u4e00\u4e9b\u63d0\u793a\u8bed\uff0c\u5373\u6211\u4eecprintk\u4e2d\u663e\u793a\u7684\u8bed\u53e5\uff0c\u8fd9\u65f6\u5019\u53ef\u4ee5\u7528dmesg\u547d\u4ee4\u6765\u67e5\u770b\u3002<\/p>\n
ok\uff0c\u7b2c\u4e00\u4e2a\u6a21\u5757\u7f16\u7a0b\u5c31\u8fd9\u4e48\u7b80\u5355\uff0ctry\u4e00\u4e0b\uff01<\/p>\n
Update 2011\/04\/03<\/strong><\/em><\/span><\/p>\n\u672c\u6587\u6240\u63cf\u8ff0\u7684\u7a0b\u5e8f\u5728ubuntu\u7cfb\u7edf\u4e0b\u6d4b\u8bd5\u6210\u529f\u3002\u5176\u4ed6\u7684Linux\u53d1\u884c\u7248\u5e94\u9002\u5f53\u4fee\u6539\u6e90\u7801\u76ee\u5f55\uff0c\u5373\u4fee\u6539LINUX_KERNEL_PATH\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b66\u4e60\u5185\u6838\u6a21\u5757\u7f16\u7a0b\uff0c\u7b2c\u4e00\u4e2a\u5c0f\u7a0b\u5e8f\u5f53\u7136\u662fhello,kernel\uff01\u4e86\uff0c\u8fd9\u5e94\u5f53\u7b97\u662f\u4e00\u4e2a\u60ef\u4f8b\u4e86\u3002\u4ee5\u524d\u5927\u4e09\u7684\u65f6\u5019\u5728\u5b9e\u9a8c\u8bfe […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[134,147,148],"class_list":["post-1336","post","type-post","status-publish","format-standard","hentry","category-linux","tag-kernel","tag-147","tag-148"],"views":48420,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/1336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=1336"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/1336\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=1336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=1336"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=1336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}