5 #include <linux/module.h>
6 #include <linux/proc_fs.h>
7 #include <linux/sched.h>
8 #include <linux/timex.h>
9 #include <linux/marker.h>
10 #include <asm/ptrace.h>
11 static void noinline
test2(const struct marker
*mdata
,
12 void *call_private
, ...)
14 unsigned char *ins
= __builtin_return_address(0) - 5;
17 printk("ip %p\n", __builtin_return_address(0));
18 printk("prev_ins %hX %hX %hX %hX %hX\n",
19 ins
[0], ins
[1], ins
[2], ins
[3], ins
[4]);
29 * Generic marker flavor always available.
30 * Note : the empty asm volatile with read constraint is used here instead of a
31 * "used" attribute to fix a gcc 4.1.x bug.
32 * Make sure the alignment of the structure in the __markers section will
33 * not add unwanted padding between the beginning of the section and the
34 * structure. Force alignment to the same alignment as the section start.
36 #define __my_trace_mark(generic, name, call_private, format, args...) \
38 static const char __mstrtab_##name[] \
39 __attribute__((section("__markers_strings"))) \
40 = #name "\0" format; \
41 static struct marker __mark_##name \
42 __attribute__((section("__markers"), aligned(8))) = \
43 { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \
44 0, 0, marker_probe_cb, \
45 { __mark_empty_function, NULL}, NULL }; \
46 __mark_check_format(format, ## args); \
48 if (unlikely(imv_read(__mark_##name.state))) \
50 (&__mark_##name, call_private, \
53 if (unlikely(_imv_read(__mark_##name.state))) \
55 (&__mark_##name, call_private, \
61 struct proc_dir_entry
*pentry
= NULL
;
63 static inline void test(unsigned long arg
, unsigned long arg2
)
66 //__my_trace_mark(1, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
67 test2(NULL
, NULL
, 2, current
->pid
, arg
, arg2
);
68 //__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
71 static int my_open(struct inode
*inode
, struct file
*file
)
74 cycles_t cycles1
, cycles2
;
77 local_irq_save(flags
);
79 cycles1
= get_cycles();
81 for(i
=0; i
<20000; i
++) {
85 cycles2
= get_cycles();
87 local_irq_restore(flags
);
88 printk("cycles : %llu\n", cycles2
-cycles1
);
93 static struct file_operations my_operations
= {
99 pentry
= create_proc_entry("testmark", 0444, NULL
);
101 pentry
->proc_fops
= &my_operations
;
106 void cleanup_module(void)
108 remove_proc_entry("testmark", NULL
);
111 MODULE_LICENSE("GPL");
112 MODULE_AUTHOR("Mathieu Desnoyers");
113 MODULE_DESCRIPTION("Marker Test");