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 15 int load_kallsyms(void); 16 int load_kallsyms_refresh(void); 17 18 struct ksym *ksym_search(long key); 19 long ksym_get_addr(const char *name); 20 21 /* open kallsyms and find addresses on the fly, faster than load + search. */ 22 int kallsyms_find(const char *sym, unsigned long long *addr); 23 24 void read_trace_pipe(void); 25 26 ssize_t get_uprobe_offset(const void *addr); 27 ssize_t get_rel_offset(uintptr_t addr); 28 29 int read_build_id(const char *path, char *build_id, size_t size); 30 31 #endif 32