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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Facebook
#include <linux/bpf.h>
#include <stdint.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_core_read.h>
char _license[] SEC("license") = "GPL";
struct {
char in[256];
char out[256];
} data = {};
struct core_reloc_nesting_substruct {
int a;
};
union core_reloc_nesting_subunion {
int b;
};
/* int a.a.a and b.b.b accesses */
struct core_reloc_nesting {
union {
struct core_reloc_nesting_substruct a;
} a;
struct {
union core_reloc_nesting_subunion b;
} b;
};
#define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src)
SEC("raw_tracepoint/sys_enter")
int test_core_nesting(void *ctx)
{
struct core_reloc_nesting *in = (void *)&data.in;
struct core_reloc_nesting *out = (void *)&data.out;
if (CORE_READ(&out->a.a.a, &in->a.a.a))
return 1;
if (CORE_READ(&out->b.b.b, &in->b.b.b))
return 1;
return 0;
}
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