45 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __TRACE_HELPER_H3#define __TRACE_HELPER_H4 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 10struct ksym {11 long addr;12 char *name;13};14struct ksyms;15 16typedef int (*ksym_cmp_t)(const void *p1, const void *p2);17typedef int (*ksym_search_cmp_t)(const void *p1, const struct ksym *p2);18 19int load_kallsyms(void);20struct ksym *ksym_search(long key);21long ksym_get_addr(const char *name);22 23struct ksyms *load_kallsyms_local(void);24struct ksym *ksym_search_local(struct ksyms *ksyms, long key);25long ksym_get_addr_local(struct ksyms *ksyms, const char *name);26void free_kallsyms_local(struct ksyms *ksyms);27 28struct ksyms *load_kallsyms_custom_local(ksym_cmp_t cmp_cb);29struct 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. */33int kallsyms_find(const char *sym, unsigned long long *addr);34 35void read_trace_pipe(void);36int read_trace_pipe_iter(void (*cb)(const char *str, void *data),37 void *data, int iter);38 39ssize_t get_uprobe_offset(const void *addr);40ssize_t get_rel_offset(uintptr_t addr);41 42int read_build_id(const char *path, char *build_id, size_t size);43 44#endif45