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_arrays_output {
17 	int a2;
18 	int a3;
19 	char b123;
20 	int c1c;
21 	int d00d;
22 	int f01c;
23 };
24 
25 struct core_reloc_arrays_substruct {
26 	int c;
27 	int d;
28 };
29 
30 struct core_reloc_arrays {
31 	int a[5];
32 	char b[2][3][4];
33 	struct core_reloc_arrays_substruct c[3];
34 	struct core_reloc_arrays_substruct d[1][2];
35 	struct core_reloc_arrays_substruct f[][2];
36 };
37 
38 #define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src)
39 
40 SEC("raw_tracepoint/sys_enter")
test_core_arrays(void * ctx)41 int test_core_arrays(void *ctx)
42 {
43 	struct core_reloc_arrays *in = (void *)&data.in;
44 	struct core_reloc_arrays_output *out = (void *)&data.out;
45 	int *a;
46 
47 	if (CORE_READ(&out->a2, &in->a[2]))
48 		return 1;
49 	if (CORE_READ(&out->b123, &in->b[1][2][3]))
50 		return 1;
51 	if (CORE_READ(&out->c1c, &in->c[1].c))
52 		return 1;
53 	if (CORE_READ(&out->d00d, &in->d[0][0].d))
54 		return 1;
55 	if (CORE_READ(&out->f01c, &in->f[0][1].c))
56 		return 1;
57 
58 	a = __builtin_preserve_access_index(({ in->a; }));
59 	out->a3 = a[0] + a[1] + a[2] + a[3];
60 
61 	return 0;
62 }
63 
64