1// SPDX-License-Identifier: GPL-2.0
 2#include <stdio.h>
 3#include <unistd.h>
 4#include <linux/bpf.h>
 5#include <string.h>
 6#include <assert.h>
 7#include <sys/resource.h>
 8#include "libbpf.h"
 9#include "bpf_load.h"
10
11int main(int ac, char **argv)
12{
13	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
14	long key, next_key, value;
15	char filename[256];
16	struct ksym *sym;
17	int i;
18
19	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
20	setrlimit(RLIMIT_MEMLOCK, &r);
21
22	if (load_kallsyms()) {
23		printf("failed to process /proc/kallsyms\n");
24		return 2;
25	}
26
27	if (load_bpf_file(filename)) {
28		printf("%s", bpf_log_buf);
29		return 1;
30	}
31
32	for (i = 0; i < 5; i++) {
33		key = 0;
34		printf("kprobing funcs:");
35		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
36			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
37			assert(next_key == value);
38			sym = ksym_search(value);
39			printf(" %s", sym->name);
40			key = next_key;
41		}
42		if (key)
43			printf("\n");
44		key = 0;
45		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0)
46			bpf_map_delete_elem(map_fd[0], &next_key);
47		sleep(1);
48	}
49
50	return 0;
51}