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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 | */ | |
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 | */ | |
40 | void __gcov_flush(void) | |
41 | { | |
42 | /* Unused. */ | |
43 | } | |
44 | EXPORT_SYMBOL(__gcov_flush); | |
45 | ||
46 | void __gcov_merge_add(gcov_type *counters, unsigned int n_counters) | |
47 | { | |
48 | /* Unused. */ | |
49 | } | |
50 | EXPORT_SYMBOL(__gcov_merge_add); | |
51 | ||
52 | void __gcov_merge_single(gcov_type *counters, unsigned int n_counters) | |
53 | { | |
54 | /* Unused. */ | |
55 | } | |
56 | EXPORT_SYMBOL(__gcov_merge_single); | |
57 | ||
58 | void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters) | |
59 | { | |
60 | /* Unused. */ | |
61 | } | |
62 | EXPORT_SYMBOL(__gcov_merge_delta); | |
63 | ||
64 | void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters) | |
65 | { | |
66 | /* Unused. */ | |
67 | } | |
68 | EXPORT_SYMBOL(__gcov_merge_ior); | |
69 | ||
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 | ||
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 | ||
82 | void __gcov_exit(void) | |
83 | { | |
84 | /* Unused. */ | |
85 | } | |
86 | EXPORT_SYMBOL(__gcov_exit); |