75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
// 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;
|
|
}
|
|
|