tools/testing/selftests/bpf/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
  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