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 #endif
45
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