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