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 #include <asm/system.h>
13 static void noinline
test2(const struct marker
*mdata
,
14 void *call_private
, ...)
16 unsigned char *ins
= __builtin_return_address(0) - 5;
19 printk("ip %p\n", __builtin_return_address(0));
20 printk("prev_ins %hX %hX %hX %hX %hX\n",
21 ins
[0], ins
[1], ins
[2], ins
[3], ins
[4]);
31 * Generic marker flavor always available.
32 * Note : the empty asm volatile with read constraint is used here instead of a
33 * "used" attribute to fix a gcc 4.1.x bug.
34 * Make sure the alignment of the structure in the __markers section will
35 * not add unwanted padding between the beginning of the section and the
36 * structure. Force alignment to the same alignment as the section start.
38 #define __my_trace_mark(generic, name, call_private, format, args...) \
40 static const char __mstrtab_##name[] \
41 __attribute__((section("__markers_strings"))) \
42 = #name "\0" format; \
43 static struct marker __mark_##name \
44 __attribute__((section("__markers"), aligned(8))) = \
45 { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \
46 0, 0, marker_probe_cb, \
47 { __mark_empty_function, NULL}, NULL }; \
48 __mark_check_format(format, ## args); \
50 if (unlikely(imv_read(__mark_##name.state))) \
52 (&__mark_##name, call_private, \
55 if (unlikely(_imv_read(__mark_##name.state))) \
57 (&__mark_##name, call_private, \
63 struct proc_dir_entry
*pentry
= NULL
;
65 static inline void test(unsigned long arg
, unsigned long arg2
)
71 //__my_trace_mark(1, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
72 test2(NULL
, NULL
, 2, 10, arg
, arg2
);
73 //__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2);
76 static int my_open(struct inode
*inode
, struct file
*file
)
79 cycles_t cycles1
, cycles2
;
82 local_irq_save(flags
);
84 cycles1
= get_cycles();
86 for(i
=0; i
<200; i
++) {
99 cycles2
= get_cycles();
101 local_irq_restore(flags
);
102 printk("cycles : %llu\n", cycles2
-cycles1
);
107 static struct file_operations my_operations
= {
111 int init_module(void)
113 pentry
= create_proc_entry("testmark", 0444, NULL
);
115 pentry
->proc_fops
= &my_operations
;
120 void cleanup_module(void)
122 remove_proc_entry("testmark", NULL
);
125 MODULE_LICENSE("GPL");
126 MODULE_AUTHOR("Mathieu Desnoyers");
127 MODULE_DESCRIPTION("Marker Test");
128 MODULE_VERSION("1.0");