1 // SPDX-License-Identifier: GPL-2.0
2 #ifndef _PERF_BPF_H
3 #define _PERF_BPF_H
4 
5 #include <uapi/linux/bpf.h>
6 
7 /*
8  * A helper structure used by eBPF C program to describe map attributes to
9  * elf_bpf loader, taken from tools/testing/selftests/bpf/bpf_helpers.h:
10  */
11 struct bpf_map {
12         unsigned int type;
13         unsigned int key_size;
14         unsigned int value_size;
15         unsigned int max_entries;
16         unsigned int map_flags;
17         unsigned int inner_map_idx;
18         unsigned int numa_node;
19 };
20 
21 #define SEC(NAME) __attribute__((section(NAME),  used))
22 
23 #define probe(function, vars) \
24 	SEC(#function "=" #function " " #vars) function
25 
26 #define syscall_enter(name) \
27 	SEC("syscalls:sys_enter_" #name) syscall_enter_ ## name
28 
29 #define license(name) \
30 char _license[] SEC("license") = #name; \
31 int _version SEC("version") = LINUX_VERSION_CODE;
32 
33 static int (*probe_read)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read;
34 static int (*probe_read_str)(void *dst, int size, const void *unsafe_addr) = (void *)BPF_FUNC_probe_read_str;
35 
36 #endif /* _PERF_BPF_H */
37