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