1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/bpf.h>
3 #include <bpf/bpf_helpers.h>
4 #include <bpf/bpf_tracing.h>
5 #include <stdbool.h>
6 
7 #ifdef ENABLE_ATOMICS_TESTS
8 bool skip_tests __attribute((__section__(".data"))) = false;
9 #else
10 bool skip_tests = true;
11 #endif
12 
13 __u64 add64_value = 1;
14 __u64 add64_result = 0;
15 __u32 add32_value = 1;
16 __u32 add32_result = 0;
17 __u64 add_stack_value_copy = 0;
18 __u64 add_stack_result = 0;
19 __u64 add_noreturn_value = 1;
20 
21 SEC("fentry/bpf_fentry_test1")
22 int BPF_PROG(add, int a)
23 {
24 #ifdef ENABLE_ATOMICS_TESTS
25 	__u64 add_stack_value = 1;
26 
27 	add64_result = __sync_fetch_and_add(&add64_value, 2);
28 	add32_result = __sync_fetch_and_add(&add32_value, 2);
29 	add_stack_result = __sync_fetch_and_add(&add_stack_value, 2);
30 	add_stack_value_copy = add_stack_value;
31 	__sync_fetch_and_add(&add_noreturn_value, 2);
32 #endif
33 
34 	return 0;
35 }
36 
37 __s64 sub64_value = 1;
38 __s64 sub64_result = 0;
39 __s32 sub32_value = 1;
40 __s32 sub32_result = 0;
41 __s64 sub_stack_value_copy = 0;
42 __s64 sub_stack_result = 0;
43 __s64 sub_noreturn_value = 1;
44 
45 SEC("fentry/bpf_fentry_test1")
46 int BPF_PROG(sub, int a)
47 {
48 #ifdef ENABLE_ATOMICS_TESTS
49 	__u64 sub_stack_value = 1;
50 
51 	sub64_result = __sync_fetch_and_sub(&sub64_value, 2);
52 	sub32_result = __sync_fetch_and_sub(&sub32_value, 2);
53 	sub_stack_result = __sync_fetch_and_sub(&sub_stack_value, 2);
54 	sub_stack_value_copy = sub_stack_value;
55 	__sync_fetch_and_sub(&sub_noreturn_value, 2);
56 #endif
57 
58 	return 0;
59 }
60 
61 __u64 and64_value = (0x110ull << 32);
62 __u64 and64_result = 0;
63 __u32 and32_value = 0x110;
64 __u32 and32_result = 0;
65 __u64 and_noreturn_value = (0x110ull << 32);
66 
67 SEC("fentry/bpf_fentry_test1")
68 int BPF_PROG(and, int a)
69 {
70 #ifdef ENABLE_ATOMICS_TESTS
71 
72 	and64_result = __sync_fetch_and_and(&and64_value, 0x011ull << 32);
73 	and32_result = __sync_fetch_and_and(&and32_value, 0x011);
74 	__sync_fetch_and_and(&and_noreturn_value, 0x011ull << 32);
75 #endif
76 
77 	return 0;
78 }
79 
80 __u64 or64_value = (0x110ull << 32);
81 __u64 or64_result = 0;
82 __u32 or32_value = 0x110;
83 __u32 or32_result = 0;
84 __u64 or_noreturn_value = (0x110ull << 32);
85 
86 SEC("fentry/bpf_fentry_test1")
87 int BPF_PROG(or, int a)
88 {
89 #ifdef ENABLE_ATOMICS_TESTS
90 	or64_result = __sync_fetch_and_or(&or64_value, 0x011ull << 32);
91 	or32_result = __sync_fetch_and_or(&or32_value, 0x011);
92 	__sync_fetch_and_or(&or_noreturn_value, 0x011ull << 32);
93 #endif
94 
95 	return 0;
96 }
97 
98 __u64 xor64_value = (0x110ull << 32);
99 __u64 xor64_result = 0;
100 __u32 xor32_value = 0x110;
101 __u32 xor32_result = 0;
102 __u64 xor_noreturn_value = (0x110ull << 32);
103 
104 SEC("fentry/bpf_fentry_test1")
105 int BPF_PROG(xor, int a)
106 {
107 #ifdef ENABLE_ATOMICS_TESTS
108 	xor64_result = __sync_fetch_and_xor(&xor64_value, 0x011ull << 32);
109 	xor32_result = __sync_fetch_and_xor(&xor32_value, 0x011);
110 	__sync_fetch_and_xor(&xor_noreturn_value, 0x011ull << 32);
111 #endif
112 
113 	return 0;
114 }
115 
116 __u64 cmpxchg64_value = 1;
117 __u64 cmpxchg64_result_fail = 0;
118 __u64 cmpxchg64_result_succeed = 0;
119 __u32 cmpxchg32_value = 1;
120 __u32 cmpxchg32_result_fail = 0;
121 __u32 cmpxchg32_result_succeed = 0;
122 
123 SEC("fentry/bpf_fentry_test1")
124 int BPF_PROG(cmpxchg, int a)
125 {
126 #ifdef ENABLE_ATOMICS_TESTS
127 	cmpxchg64_result_fail = __sync_val_compare_and_swap(&cmpxchg64_value, 0, 3);
128 	cmpxchg64_result_succeed = __sync_val_compare_and_swap(&cmpxchg64_value, 1, 2);
129 
130 	cmpxchg32_result_fail = __sync_val_compare_and_swap(&cmpxchg32_value, 0, 3);
131 	cmpxchg32_result_succeed = __sync_val_compare_and_swap(&cmpxchg32_value, 1, 2);
132 #endif
133 
134 	return 0;
135 }
136 
137 __u64 xchg64_value = 1;
138 __u64 xchg64_result = 0;
139 __u32 xchg32_value = 1;
140 __u32 xchg32_result = 0;
141 
142 SEC("fentry/bpf_fentry_test1")
143 int BPF_PROG(xchg, int a)
144 {
145 #ifdef ENABLE_ATOMICS_TESTS
146 	__u64 val64 = 2;
147 	__u32 val32 = 2;
148 
149 	xchg64_result = __sync_lock_test_and_set(&xchg64_value, val64);
150 	xchg32_result = __sync_lock_test_and_set(&xchg32_value, val32);
151 #endif
152 
153 	return 0;
154 }
155