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
10struct ksym {
11	long addr;
12	char *name;
13};
14struct ksyms;
15
16typedef int (*ksym_cmp_t)(const void *p1, const void *p2);
17typedef int (*ksym_search_cmp_t)(const void *p1, const struct ksym *p2);
18
19int load_kallsyms(void);
20struct ksym *ksym_search(long key);
21long ksym_get_addr(const char *name);
22
23struct ksyms *load_kallsyms_local(void);
24struct ksym *ksym_search_local(struct ksyms *ksyms, long key);
25long ksym_get_addr_local(struct ksyms *ksyms, const char *name);
26void free_kallsyms_local(struct ksyms *ksyms);
27
28struct ksyms *load_kallsyms_custom_local(ksym_cmp_t cmp_cb);
29struct 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. */
33int kallsyms_find(const char *sym, unsigned long long *addr);
34
35void read_trace_pipe(void);
36int read_trace_pipe_iter(void (*cb)(const char *str, void *data),
37			 void *data, int iter);
38
39ssize_t get_uprobe_offset(const void *addr);
40ssize_t get_rel_offset(uintptr_t addr);
41
42int read_build_id(const char *path, char *build_id, size_t size);
43
44int bpf_get_ksyms(char ***symsp, size_t *cntp, bool kernel);
45int bpf_get_addrs(unsigned long **addrsp, size_t *cntp, bool kernel);
46
47#endif