Re: [PATCH] Linux Kernel Markers 0.2 for Linux 2.6.17

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


And here is the sample module to use my jump-marker symbols :

(yes, it works!)

Adresses are taken by hand from /proc/kallsyms for now.


/* test-mark.c

#include <linux/marker.h>
#include <linux/module.h>

static void **__mark_subsys_mark1_call = (void**)0xf887580c;
static void **__mark_subsys_mark1_jump_over = (void**)0xf8875814;
static void **__mark_subsys_mark1_jump_call = (void*)0xf8875810;
static void *__this_mark_empty_function = (void*)0xf8875000;

static void *saved_over;

void do_mark1(const char *format, int value)
	printk("value is %d\n", value);

int init_module(void)
	*__mark_subsys_mark1_call = (void*)do_mark1;
	saved_over = *__mark_subsys_mark1_jump_over;
	*__mark_subsys_mark1_jump_over = *__mark_subsys_mark1_jump_call;

	return 0;

void cleanup_module(void)
	*__mark_subsys_mark1_jump_over = saved_over;
	*__mark_subsys_mark1_call = __this_mark_empty_function;

MODULE_AUTHOR("Mathieu Desnoyers");


OpenPGP public key:
Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 

Attachment: signature.asc
Description: Digital signature

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux