LXR linux/tools/testing/selftests/bpf/progs/test_core_reloc

   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
  47