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 <linux/bpf.h>
3#include <bpf/bpf_helpers.h>
4#include "bpf_misc.h"
5#include "bpf_test_utils.h"
6
7struct {
8 __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
9 __uint(max_entries, 1);
10 __uint(key_size, sizeof(__u32));
11 __array(values, void (void));
12} jmp_table SEC(".maps");
13
14SEC("?uprobe")
15int uprobe_normal(void *ctx)
16{
17 bpf_tail_call_static(ctx, &jmp_table, 0);
18 return 0;
19}
20
21SEC("?uprobe.s")
22int uprobe_sleepable_1(void *ctx)
23{
24 bpf_tail_call_static(ctx, &jmp_table, 0);
25 return 0;
26}
27
28int executed = 0;
29int my_pid = 0;
30
31SEC("?uprobe.s")
32int uprobe_sleepable_2(void *ctx)
33{
34 int pid = bpf_get_current_pid_tgid() >> 32;
35
36 if (pid != my_pid)
37 return 0;
38
39 executed++;
40 return 0;
41}
42
43char __license[] SEC("license") = "GPL";