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 #ifdef __x86_64__ 8 #define SYS_PREFIX "__x64_" 9 #elif defined(__s390x__) 10 #define SYS_PREFIX "__s390x_" 11 #elif defined(__aarch64__) 12 #define SYS_PREFIX "__arm64_" 13 #elif defined(__riscv) 14 #define SYS_PREFIX "__riscv_" 15 #else 16 #define SYS_PREFIX "" 17 #endif 18 19 #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) 20 #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) 21 22 struct ksym { 23 long addr; 24 char *name; 25 }; 26 struct ksyms; 27 28 typedef int (*ksym_cmp_t)(const void *p1, const void *p2); 29 typedef int (*ksym_search_cmp_t)(const void *p1, const struct ksym *p2); 30 31 int load_kallsyms(void); 32 struct ksym *ksym_search(long key); 33 long ksym_get_addr(const char *name); 34 35 struct ksyms *load_kallsyms_local(void); 36 struct ksym *ksym_search_local(struct ksyms *ksyms, long key); 37 long ksym_get_addr_local(struct ksyms *ksyms, const char *name); 38 void free_kallsyms_local(struct ksyms *ksyms); 39 40 struct ksyms *load_kallsyms_custom_local(ksym_cmp_t cmp_cb); 41 struct ksym *search_kallsyms_custom_local(struct ksyms *ksyms, const void *p1, 42 ksym_search_cmp_t cmp_cb); 43 44 /* open kallsyms and find addresses on the fly, faster than load + search. */ 45 int kallsyms_find(const char *sym, unsigned long long *addr); 46 47 void read_trace_pipe(void); 48 int read_trace_pipe_iter(void (*cb)(const char *str, void *data), 49 void *data, int iter); 50 51 ssize_t get_uprobe_offset(const void *addr); 52 ssize_t get_rel_offset(uintptr_t addr); 53 54 int read_build_id(const char *path, char *build_id, size_t size); 55 56 int bpf_get_ksyms(char ***symsp, size_t *cntp, bool kernel); 57 int bpf_get_addrs(unsigned long **addrsp, size_t *cntp, bool kernel); 58 59 #endif 60