| // 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; |
| } |
| |