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
10struct ksym {
11	long addr;
12	char *name;
13};
14struct ksyms;
15
16int load_kallsyms(void);
17struct ksym *ksym_search(long key);
18long ksym_get_addr(const char *name);
19
20struct ksyms *load_kallsyms_local(void);
21struct ksym *ksym_search_local(struct ksyms *ksyms, long key);
22long ksym_get_addr_local(struct ksyms *ksyms, const char *name);
23void free_kallsyms_local(struct ksyms *ksyms);
24
25/* open kallsyms and find addresses on the fly, faster than load + search. */
26int kallsyms_find(const char *sym, unsigned long long *addr);
27
28void read_trace_pipe(void);
29
30ssize_t get_uprobe_offset(const void *addr);
31ssize_t get_rel_offset(uintptr_t addr);
32
33int read_build_id(const char *path, char *build_id, size_t size);
34
35#endif
36