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
9char _license[] SEC("license") = "GPL";
10
11struct {
12	char in[256];
13	char out[256];
14} data = {};
15
16struct 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
35struct 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
45SEC("raw_tracepoint/sys_enter")
46int 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
78