1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/export.h>
4 #include <linux/kernel.h>
5 #include <linux/mutex.h>
6 #include "gcov.h"
7
8 /*
9 * __gcov_init is called by gcc-generated constructor code for each object
10 * file compiled with -fprofile-arcs.
11 */
__gcov_init(struct gcov_info * info)12 void __gcov_init(struct gcov_info *info)
13 {
14 static unsigned int gcov_version;
15
16 mutex_lock(&gcov_lock);
17 if (gcov_version == 0) {
18 gcov_version = gcov_info_version(info);
19 /*
20 * Printing gcc's version magic may prove useful for debugging
21 * incompatibility reports.
22 */
23 pr_info("version magic: 0x%x\n", gcov_version);
24 }
25 /*
26 * Add new profiling data structure to list and inform event
27 * listener.
28 */
29 gcov_info_link(info);
30 if (gcov_events_enabled)
31 gcov_event(GCOV_ADD, info);
32 mutex_unlock(&gcov_lock);
33 }
34 EXPORT_SYMBOL(__gcov_init);
35
36 /*
37 * These functions may be referenced by gcc-generated profiling code but serve
38 * no function for kernel profiling.
39 */
__gcov_flush(void)40 void __gcov_flush(void)
41 {
42 /* Unused. */
43 }
44 EXPORT_SYMBOL(__gcov_flush);
45
__gcov_merge_add(gcov_type * counters,unsigned int n_counters)46 void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
47 {
48 /* Unused. */
49 }
50 EXPORT_SYMBOL(__gcov_merge_add);
51
__gcov_merge_single(gcov_type * counters,unsigned int n_counters)52 void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
53 {
54 /* Unused. */
55 }
56 EXPORT_SYMBOL(__gcov_merge_single);
57
__gcov_merge_delta(gcov_type * counters,unsigned int n_counters)58 void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
59 {
60 /* Unused. */
61 }
62 EXPORT_SYMBOL(__gcov_merge_delta);
63
__gcov_merge_ior(gcov_type * counters,unsigned int n_counters)64 void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
65 {
66 /* Unused. */
67 }
68 EXPORT_SYMBOL(__gcov_merge_ior);
69
__gcov_merge_time_profile(gcov_type * counters,unsigned int n_counters)70 void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
71 {
72 /* Unused. */
73 }
74 EXPORT_SYMBOL(__gcov_merge_time_profile);
75
__gcov_merge_icall_topn(gcov_type * counters,unsigned int n_counters)76 void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
77 {
78 /* Unused. */
79 }
80 EXPORT_SYMBOL(__gcov_merge_icall_topn);
81
__gcov_exit(void)82 void __gcov_exit(void)
83 {
84 /* Unused. */
85 }
86 EXPORT_SYMBOL(__gcov_exit);
87