[lttv.git] / trunk / tests / markers / probe-vararg.c

/* probe.c
 *
 * Loads a function at a marker call site.
 *
 * (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 *
 * This file is released under the GPLv2.
 * See the file COPYING for more details.
 */

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


int value;
void *ptr;

/* function to install */
#define DO_MARK1_FORMAT "%d %p"
void do_mark1(const char *format, ...)
{
	va_list ap;

	va_start(ap, format);
	value = va_arg(ap, int);
	ptr = va_arg(ap, void*);
	
	va_end(ap);
}

int init_module(void)
{
	int result;
	result = marker_set_probe("subsys_mark1", DO_MARK1_FORMAT,
			(marker_probe_func*)do_mark1);
	if(!result) goto end;

	return 0;

end:
	marker_remove_probe(do_mark1);
	return -EPERM;
}

void cleanup_module(void)
{
	marker_remove_probe(do_mark1);
}

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mathieu Desnoyers");
MODULE_DESCRIPTION("Probe");
Commit	Line	Data
bc82195a	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
	16	int value;
	17	void *ptr;
	18
	19	/* function to install */
	20	#define DO_MARK1_FORMAT "%d %p"
	21	void do_mark1(const char *format, ...)
	22	{
	23	va_list ap;
	24
	25	va_start(ap, format);
	26	value = va_arg(ap, int);
	27	ptr = va_arg(ap, void*);
	28
	29	va_end(ap);
	30	}
	31
	32	int init_module(void)
	33	{
	34	int result;
	35	result = marker_set_probe("subsys_mark1", DO_MARK1_FORMAT,
	36	(marker_probe_func*)do_mark1);
	37	if(!result) goto end;
	38
	39	return 0;
	40
	41	end:
	42	marker_remove_probe(do_mark1);
	43	return -EPERM;
	44	}
	45
	46	void cleanup_module(void)
	47	{
	48	marker_remove_probe(do_mark1);
	49	}
	50
	51	MODULE_LICENSE("GPL");
	52	MODULE_AUTHOR("Mathieu Desnoyers");
	53	MODULE_DESCRIPTION("Probe");