| // 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_mods_output { |
| int a, b, c, d, e, f, g, h; |
| }; |
| |
| typedef const int int_t; |
| typedef const char *char_ptr_t; |
| typedef const int arr_t[7]; |
| |
| struct core_reloc_mods_substruct { |
| int x; |
| int y; |
| }; |
| |
| typedef struct { |
| int x; |
| int y; |
| } core_reloc_mods_substruct_t; |
| |
| struct core_reloc_mods { |
| int a; |
| int_t b; |
| char *c; |
| char_ptr_t d; |
| int e[3]; |
| arr_t f; |
| struct core_reloc_mods_substruct g; |
| core_reloc_mods_substruct_t h; |
| }; |
| |
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| #define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src) |
| #else |
| #define CORE_READ(dst, src) ({ \ |
| int __sz = sizeof(*(dst)) < sizeof(*(src)) ? sizeof(*(dst)) : \ |
| sizeof(*(src)); \ |
| bpf_core_read((char *)(dst) + sizeof(*(dst)) - __sz, __sz, \ |
| (const char *)(src) + sizeof(*(src)) - __sz); \ |
| }) |
| #endif |
| |
| SEC("raw_tracepoint/sys_enter") |
| int test_core_mods(void *ctx) |
| { |
| struct core_reloc_mods *in = (void *)&data.in; |
| struct core_reloc_mods_output *out = (void *)&data.out; |
| |
| if (CORE_READ(&out->a, &in->a) || |
| CORE_READ(&out->b, &in->b) || |
| CORE_READ(&out->c, &in->c) || |
| CORE_READ(&out->d, &in->d) || |
| CORE_READ(&out->e, &in->e[2]) || |
| CORE_READ(&out->f, &in->f[1]) || |
| CORE_READ(&out->g, &in->g.x) || |
| CORE_READ(&out->h, &in->h.y)) |
| return 1; |
| |
| return 0; |
| } |
| |