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