| // 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"); |