| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright (C) 2024 Marcos Paulo de Souza <mpdesouza@suse.com> |
| // Copyright (C) 2024 Michael Vetter <mvetter@suse.com> |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/kprobes.h> |
| |
| static bool has_post_handler = true; |
| module_param(has_post_handler, bool, 0444); |
| |
| static void __kprobes post_handler(struct kprobe *p, struct pt_regs *regs, |
| unsigned long flags) |
| { |
| } |
| |
| static struct kprobe kp = { |
| .symbol_name = "cmdline_proc_show", |
| }; |
| |
| static int __init kprobe_init(void) |
| { |
| if (has_post_handler) |
| kp.post_handler = post_handler; |
| |
| return register_kprobe(&kp); |
| } |
| |
| static void __exit kprobe_exit(void) |
| { |
| unregister_kprobe(&kp); |
| } |
| |
| module_init(kprobe_init) |
| module_exit(kprobe_exit) |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Michael Vetter <mvetter@suse.com>"); |
| MODULE_DESCRIPTION("Livepatch test: kprobe function"); |
