test_core_reloc_primitives.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
16enum core_reloc_primitives_enum {
17	A = 0,
18	B = 1,
19};
20
21struct core_reloc_primitives {
22	char a;
23	int b;
24	enum core_reloc_primitives_enum c;
25	void *d;
26	int (*f)(const char *);
27};
28
29#define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src)
30
31SEC("raw_tracepoint/sys_enter")
32int test_core_primitives(void *ctx)
33{
34	struct core_reloc_primitives *in = (void *)&data.in;
35	struct core_reloc_primitives *out = (void *)&data.out;
36
37	if (CORE_READ(&out->a, &in->a) ||
38	    CORE_READ(&out->b, &in->b) ||
39	    CORE_READ(&out->c, &in->c) ||
40	    CORE_READ(&out->d, &in->d) ||
41	    CORE_READ(&out->f, &in->f))
42		return 1;
43
44	return 0;
45}
46