关键是如何写scull_read_procmem,他的结构是int (*read_proc)(char *page, char **start, off_t offset, int count, int *eof, void *data);其中返回值是char ** start和int *eof,void *data是创建文件时携带的参数,kernel不处理,但会在出发调用时传递,我们可以利用来携带某些信息,其他的都是输入值。
在我们的程序的调测中,无论是JAVA,C(kernel module或者是用户应用),print都是非常重要的手段。在我以往的项目中,我会有一个log文件,将log根据项目需要分为几个级别log,通过setlogLevel可以设置打开或者关闭哪些些级别的debug,每一行log有[时间] [log-level] [log内容]三部分组成。可以决定是否将log写入文件,还是...
The error code that identifies the error that stopped the system kernel from continuing to run. It is the first set of hexadecimal values displayed on the blue screen. At a minimum, frontline Admins should be required to note this code, and the four other codes displayed in paren...
Getting Started with WinDbg (Kernel-Mode) Debugging Environments Choosing the 32-Bit or 64-Bit Debugging Tools Setting Up Debugging (Kernel-Mode and User-Mode) Debug Windows Drivers - Step by Step Lab (Echo Kernel-Mode) Debug Drivers - Step by Step Lab (Sysvad Kernel-Mode) Debugging Resources...
2,写一个kernel module,完成信息收集,测试等工作,所有的测试代码需要在这个kernel module中完成。 下面是我今天的一个测试程序,用Kprobe测试一个内核函数所用的jiffies时间,基本上是一个Kprobe kernel module的基本框架,仅供参考: /* * kprobe_jiffies.c
Getting Started with WinDbg (Kernel-Mode) Debugging Environments Choosing the 32-Bit or 64-Bit Debugging Tools Setting Up Debugging (Kernel-Mode and User-Mode) Debug Windows Drivers - Step by Step Lab (Echo Kernel-Mode) Debug Drivers - Step by Step Lab (Sysvad Kernel-Mode) Debu...
show memory leaks: cat /sys/kernel/debug/kmemleak clear all possible leaks: echo clear > /sys/kernel/debug/kmemleak 例如,让我们看一下以下简单模块: static int leak_init(void) { pr_info("%s\n", __func__); (void)kmalloc(16, GFP_KERNEL); return 0; } MODULE_LICENSE("GPL v2"); m...
卸载模块后,/sys/kernel/debug/dynamic_debug/control 也没有pr_debug的动态调试信息。 测试时,可以加载pr_debug驱动模块后,设置/sys/kernel/debug/dynamic_debug/control 信息,再去卸载pr_debug驱动模块,此时卸载时没打印。 echo'module pr_debug -p'> /sys/kernel/debug/dynamic_debug/control ...
#include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/miscdevice.h> #include <linux/workqueue.h> #include <linux/jiffies.h> #include <asm/page.h> #include <linux/vmalloc.h> #include <linux/mm.h> enum sample_kmemleak_test_case{ SLAB_LEAK = ...
How can I debug Loadable Kernel Modules (*.ko) using SDK? Solution Kernel module debug has been simplified through the OS aware debug feature, available in Vivado 2016.1. The steps below describe the procedure to debug kernel modules using System Debugger and the OS Aware Debug feature. 1)...