1  // SPDX-License-Identifier: GPL-2.0
2  // Copyright (c) 2020 Facebook
3  
4  #include "vmlinux.h"
5  #include <bpf/bpf_helpers.h>
6  #include <bpf/bpf_tracing.h>
7  
8  SEC("freplace/btf_unreliable_kprobe")
9  /* context type is what BPF verifier expects for kprobe context, but target
10   * program has `stuct whatever *ctx` argument, so freplace operation will be
11   * rejected with the following message:
12   *
13   * arg0 replace_btf_unreliable_kprobe(struct pt_regs *) doesn't match btf_unreliable_kprobe(struct whatever *)
14   */
replace_btf_unreliable_kprobe(bpf_user_pt_regs_t * ctx)15  int replace_btf_unreliable_kprobe(bpf_user_pt_regs_t *ctx)
16  {
17  	return 0;
18  }
19  
20  char _license[] SEC("license") = "GPL";
21