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 struct ksym {
8 	long addr;
9 	char *name;
10 };
11 
12 int load_kallsyms(void);
13 struct ksym *ksym_search(long key);
14 long ksym_get_addr(const char *name);
15 
16 /* open kallsyms and find addresses on the fly, faster than load + search. */
17 int kallsyms_find(const char *sym, unsigned long long *addr);
18 
19 /* find the address of the next symbol, this can be used to determine the
20  * end of a function
21  */
22 int kallsyms_find_next(const char *sym, unsigned long long *addr);
23 
24 void read_trace_pipe(void);
25 
26 ssize_t get_uprobe_offset(const void *addr, ssize_t base);
27 ssize_t get_base_addr(void);
28 ssize_t get_rel_offset(uintptr_t addr);
29 
30 #endif
31