1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2020 Facebook
4 #include <linux/ptrace.h>
6 #include <bpf/bpf_helpers.h>
7 #include <bpf/bpf_tracing.h>
12 struct bpf_spin_lock lock;
17 __uint(type, BPF_MAP_TYPE_HASH);
18 __uint(max_entries, 1);
20 __type(value, struct hmap_elem);
21 } hash_map SEC(".maps");
23 SEC("freplace/handle_kprobe")
24 int new_handle_kprobe(struct pt_regs *ctx)
26 struct hmap_elem *val;
29 val = bpf_map_lookup_elem(&hash_map, &key);
32 /* spin_lock in hash map */
33 bpf_spin_lock(&val->lock);
35 bpf_spin_unlock(&val->lock);
40 char _license[] SEC("license") = "GPL";