Messages in this thread | | | Date | Wed, 20 Sep 2006 13:14:13 -0400 | From | Mathieu Desnoyers <> | Subject | Re: [PATCH] Linux Kernel Markers 0.2 for Linux 2.6.17 |
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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.
---BEGIN---
/* 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_LICENSE("GPL"); MODULE_AUTHOR("Mathieu Desnoyers"); MODULE_DESCRIPTION("Marker Test");
---END---
OpenPGP public key: http://krystal.dyndns.org:8080/key/compudj.gpg Key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 [unhandled content-type:application/pgp-signature] | |