trace_helpers.h source code [linux/tools/testing/selftests/bpf/trace_helpers.h]

1	/ SPDX-License-Identifier: GPL-2.0 /
2	#ifndef __TRACE_HELPER_H
3	#define __TRACE_HELPER_H
4
5	#include <bpf/libbpf.h>
6
7	#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
8	#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
9
10	struct ksym {
11	long addr;
12	char *name;
13	};
14	struct ksyms;
15
16	typedef int (ksym_cmp_t)(const* void p1, const* void *p2);
17	typedef int (ksym_search_cmp_t)(const* void p1, const* struct ksym *p2);
18
19	int load_kallsyms(void);
20	struct ksym ksym_search(long* key);
21	long ksym_get_addr(const char *name);
22
23	struct ksyms load_kallsyms_local(void*);
24	struct ksym ksym_search_local(struct* ksyms ksyms, long* key);
25	long ksym_get_addr_local(struct ksyms ksyms, const* char *name);
26	void free_kallsyms_local(struct ksyms *ksyms);
27
28	struct ksyms *load_kallsyms_custom_local(ksym_cmp_t cmp_cb);
29	struct ksym search_kallsyms_custom_local(struct* ksyms ksyms, const* void *p1,
30	ksym_search_cmp_t cmp_cb);
31
32	/ open kallsyms and find addresses on the fly, faster than load + search. /
33	int kallsyms_find(const char sym, unsigned* long long *addr);
34
35	void read_trace_pipe(void);
36	int read_trace_pipe_iter(void (cb)(const* char str, void* *data),
37	void data, int* iter);
38
39	ssize_t get_uprobe_offset(const void *addr);
40	ssize_t get_rel_offset(uintptr_t addr);
41
42	int read_build_id(const char path, char* *build_id, size_t size);
43
44	int bpf_get_ksyms(char **symsp, size_t cntp, bool kernel);
45	int bpf_get_addrs(unsigned long *addrsp, size_t cntp, bool kernel);
46
47	#endif
48

source code of linux/tools/testing/selftests/bpf/trace_helpers.h