tests/kernel/probe.c

   1 /* probe.c
   2  *
   3  * Loads a function at a marker call site.
   4  *
   5  * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
   6  *
   7  * This file is released under the GPLv2.
   8  * See the file COPYING for more details.
   9  */
  10
  11 #include <linux/marker.h>
  12 #include <linux/module.h>
  13 #include <linux/kallsyms.h>
  14
  15 /* function to install */
  16 void do_mark1(const char *format, int value)
  17 {
  18         printk("value is %d\n", value);
  19 }
  20
  21 int init_module(void)
  22 {
  23         return marker_set_probe("subsys_mark1", (marker_probe)do_mark1,
  24                         MARKER_CALL);
  25 }
  26
  27 void cleanup_module(void)
  28 {
  29         marker_disable_probe("subsys_mark1", (marker_probe)do_mark1,
  30                 MARKER_CALL);
  31 }
  32
  33 MODULE_LICENSE("GPL");
  34 MODULE_AUTHOR("Mathieu Desnoyers");
  35 MODULE_DESCRIPTION("Probe");
  36