test_core_reloc_arrays.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
 9char _license[] SEC("license") = "GPL";
10
11struct {
12	char in[256];
13	char out[256];
14} data = {};
15
16struct core_reloc_arrays_output {
17	int a2;
18	int a3;
19	char b123;
20	int c1c;
21	int d00d;
22	int f01c;
23};
24
25struct core_reloc_arrays_substruct {
26	int c;
27	int d;
28};
29
30struct 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
40SEC("raw_tracepoint/sys_enter")
41int 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