1 #include <stdio.h> 2 #include <unistd.h> 3 #include <linux/bpf.h> 4 #include <string.h> 5 #include <assert.h> 6 #include <sys/resource.h> 7 #include "libbpf.h" 8 #include "bpf_load.h" 9 10 int main(int ac, char **argv) 11 { 12 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; 13 long key, next_key, value; 14 char filename[256]; 15 struct ksym *sym; 16 int i; 17 18 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); 19 setrlimit(RLIMIT_MEMLOCK, &r); 20 21 if (load_kallsyms()) { 22 printf("failed to process /proc/kallsyms\n"); 23 return 2; 24 } 25 26 if (load_bpf_file(filename)) { 27 printf("%s", bpf_log_buf); 28 return 1; 29 } 30 31 for (i = 0; i < 5; i++) { 32 key = 0; 33 printf("kprobing funcs:"); 34 while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) { 35 bpf_lookup_elem(map_fd[0], &next_key, &value); 36 assert(next_key == value); 37 sym = ksym_search(value); 38 printf(" %s", sym->name); 39 key = next_key; 40 } 41 if (key) 42 printf("\n"); 43 key = 0; 44 while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) 45 bpf_delete_elem(map_fd[0], &next_key); 46 sleep(1); 47 } 48 49 return 0; 50 } 51