tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}