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a2818ee4 JL |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (C) 2014 Seth Jennings <sjenning@redhat.com> | |
3 | ||
4 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/livepatch.h> | |
9 | ||
10 | #include <linux/seq_file.h> | |
11 | static int livepatch_cmdline_proc_show(struct seq_file *m, void *v) | |
12 | { | |
13 | seq_printf(m, "%s: %s\n", THIS_MODULE->name, | |
14 | "this has been live patched"); | |
15 | return 0; | |
16 | } | |
17 | ||
18 | static struct klp_func funcs[] = { | |
19 | { | |
20 | .old_name = "cmdline_proc_show", | |
21 | .new_func = livepatch_cmdline_proc_show, | |
22 | }, { } | |
23 | }; | |
24 | ||
25 | static struct klp_object objs[] = { | |
26 | { | |
27 | /* name being NULL means vmlinux */ | |
28 | .funcs = funcs, | |
29 | }, { } | |
30 | }; | |
31 | ||
32 | static struct klp_patch patch = { | |
33 | .mod = THIS_MODULE, | |
34 | .objs = objs, | |
35 | }; | |
36 | ||
37 | static int test_klp_livepatch_init(void) | |
38 | { | |
39 | return klp_enable_patch(&patch); | |
40 | } | |
41 | ||
42 | static void test_klp_livepatch_exit(void) | |
43 | { | |
44 | } | |
45 | ||
46 | module_init(test_klp_livepatch_init); | |
47 | module_exit(test_klp_livepatch_exit); | |
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_INFO(livepatch, "Y"); | |
50 | MODULE_AUTHOR("Seth Jennings <sjenning@redhat.com>"); | |
51 | MODULE_DESCRIPTION("Livepatch test: livepatch module"); |