selftests/bpf: Fix erroneous bitmask operation
[platform/kernel/linux-rpi.git] / tools / testing / selftests / bpf / progs / test_core_reloc_size.c
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Facebook
3
4 #include <linux/bpf.h>
5 #include <stdint.h>
6 #include <bpf/bpf_helpers.h>
7 #include <bpf/bpf_core_read.h>
8
9 char _license[] SEC("license") = "GPL";
10
11 struct {
12         char in[256];
13         char out[256];
14 } data = {};
15
16 struct core_reloc_size_output {
17         int int_sz;
18         int int_off;
19         int struct_sz;
20         int struct_off;
21         int union_sz;
22         int union_off;
23         int arr_sz;
24         int arr_off;
25         int arr_elem_sz;
26         int arr_elem_off;
27         int ptr_sz;
28         int ptr_off;
29         int enum_sz;
30         int enum_off;
31         int float_sz;
32         int float_off;
33 };
34
35 struct core_reloc_size {
36         int int_field;
37         struct { int x; } struct_field;
38         union { int x; } union_field;
39         int arr_field[4];
40         void *ptr_field;
41         enum { VALUE = 123 } enum_field;
42         float float_field;
43 };
44
45 SEC("raw_tracepoint/sys_enter")
46 int test_core_size(void *ctx)
47 {
48         struct core_reloc_size *in = (void *)&data.in;
49         struct core_reloc_size_output *out = (void *)&data.out;
50
51         out->int_sz = bpf_core_field_size(in->int_field);
52         out->int_off = bpf_core_field_offset(in->int_field);
53
54         out->struct_sz = bpf_core_field_size(in->struct_field);
55         out->struct_off = bpf_core_field_offset(in->struct_field);
56
57         out->union_sz = bpf_core_field_size(in->union_field);
58         out->union_off = bpf_core_field_offset(in->union_field);
59
60         out->arr_sz = bpf_core_field_size(in->arr_field);
61         out->arr_off = bpf_core_field_offset(in->arr_field);
62
63         out->arr_elem_sz = bpf_core_field_size(struct core_reloc_size, arr_field[1]);
64         out->arr_elem_off = bpf_core_field_offset(struct core_reloc_size, arr_field[1]);
65
66         out->ptr_sz = bpf_core_field_size(struct core_reloc_size, ptr_field);
67         out->ptr_off = bpf_core_field_offset(struct core_reloc_size, ptr_field);
68
69         out->enum_sz = bpf_core_field_size(struct core_reloc_size, enum_field);
70         out->enum_off = bpf_core_field_offset(struct core_reloc_size, enum_field);
71
72         out->float_sz = bpf_core_field_size(struct core_reloc_size, float_field);
73         out->float_off = bpf_core_field_offset(struct core_reloc_size, float_field);
74
75         return 0;
76 }
77