{"id":16331388,"url":"https://github.com/midoks/linux-kernel-intercept","last_synced_at":"2025-05-15T16:14:08.439Z","repository":{"id":76206937,"uuid":"584295405","full_name":"midoks/linux-kernel-intercept","owner":"midoks","description":"linux kernel intercept 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linux-kernel-intercept\n\nlinux内核拦截事例\n\n### 简单说明\n\n- 下载到/opt目录下,进行测试。\n\n\n### 一键安装测试\n\n```\ncurl -fsSL  https://raw.githubusercontent.com/midoks/linux-kernel-intercept/main/scripts/install.sh | bash\n```\n\n\n### 常用命令\n\n- 从 System.map 文件中读取(System.map 是一份内核符号表，包含了内核中的变量名和函数名地址，在每次编译内核时，自动生成。获取 sys_call_table 数组的虚拟地址使用如下命令)： \n\n```\nsudo cat /boot/System.map-`uname -r` | grep sys_call_table\ncat /proc/kallsyms | grep sys_call_table\ncat /proc/kallsyms | grep kallsyms_lookup_name\ncat /proc/kallsyms | grep sys_kill\ncat /proc/kallsyms | grep sys_mkdir\n\n\ncat /proc/kallsyms | grep sys_call_table | head -n 1|awk '{printf $1}'\n\ninsmod hello.ko sys_call_table_address=`cat /proc/kallsyms | grep sys_call_table | head -n 1|awk '{printf $1}'`\n\ninsmod hello.ko sys_call_table_address=ffffffffb5e002e0\n```\n\n- demsg调试命令\n\n```\nsudo dmesg \t\t\t\t\t\t#列出所有 dmesg 消息\nsudo dmesg | less \t\t\t\t#更少的消息分页\nsudo dmesg -L \t\t\t\t\t#着色 dmesg 消息\nsudo dmesg -H \t\t\t\t\t#dmesg 人性化格式\nsudo dmesg -T\t\t\t\t\t#dmesg 人类可读格式\nsudo dmesg --follow\t\t\t\t#dmesg 实时监控\nsudo dmesg | head -10\t\t\t#前 10 条 dmesg 消息\nsudo dmesg | tail -10\t\t\t#最近 10 条 dmesg 消息\nsudo dmesg | grep -i \"admin\" \t#过滤特定字符串\nsudo dmesg -l warn \t\t\t\t#过滤特定的消息级别\nsudo dmesg -l warn,err \t\t\t#过滤多个消息级别\n\ndmesg 消息级别\n内核或 dmesg 消息设置有不同的级别来指定消息的重要性。\nemerg： 系统无法使用。\nalert： 必须立即采取行动。\ncrit： 临界条件。\nerr： 错误条件。\nwarn： 警告条件。\nnotice： 正常但重要的情况。\ninfo： 信息。\ndebug： 调试级消息。\n\ncat /var/log/dmesg.old \n\n#内核崩溃日志\n/var/crash\n\n```\n\n### 查看加载模块\n\n- ls /lib/modules/`uname -r`/extra\n\n```\nlsmod\nlsmod | grep hello\n```\n\n### 系统函数头文件\n```\ninclude/linux/syscalls.h\n\n例子,具体源码中去查找\n\nasmlinkage long sys_getcwd(char __user *buf, unsigned long size);\nasmlinkage long sys_mkdir(const char __user *pathname, umode_t mode);\nasmlinkage long sys_chdir(const char __user *filename);\nasmlinkage long sys_fchdir(unsigned int fd);\nasmlinkage long sys_rmdir(const char __user *pathname);\nasmlinkage long sys_lookup_dcookie(u64 cookie64, char __user *buf, size_t len);\n```\n\n##\n```\nyum -y install lrzsz\napt-get install lrzsz\n```\n\n### 参考\n- https://zhuanlan.zhihu.com/p/549973896\n- https://copyfuture.com/blogs-details/202211090546213912\n- https://blog.51cto.com/u_15775105/5822083\n- http://www.deansys.com/doc/ldd3/ch02s03.html\n- https://github.com/torvalds/linux/search?q=__NR_open\n- https://github.com/DaveGamble/cJSON\n- https://syscalls64.paolostivanin.com/\n- https://zhuanlan.zhihu.com/p/518244444\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmidoks%2Flinux-kernel-intercept","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmidoks%2Flinux-kernel-intercept","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmidoks%2Flinux-kernel-intercept/lists"}