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57 lines
1.3 KiB
57 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2018 Joe Lawrence <[email protected]> |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/livepatch.h> |
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static int replace; |
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module_param(replace, int, 0644); |
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MODULE_PARM_DESC(replace, "replace (default=0)"); |
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#include <linux/seq_file.h> |
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static int livepatch_meminfo_proc_show(struct seq_file *m, void *v) |
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{ |
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seq_printf(m, "%s: %s\n", THIS_MODULE->name, |
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"this has been live patched"); |
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return 0; |
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} |
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static struct klp_func funcs[] = { |
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{ |
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.old_name = "meminfo_proc_show", |
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.new_func = livepatch_meminfo_proc_show, |
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}, {} |
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}; |
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static struct klp_object objs[] = { |
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{ |
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/* name being NULL means vmlinux */ |
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.funcs = funcs, |
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}, {} |
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}; |
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static struct klp_patch patch = { |
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.mod = THIS_MODULE, |
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.objs = objs, |
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/* set .replace in the init function below for demo purposes */ |
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}; |
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static int test_klp_atomic_replace_init(void) |
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{ |
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patch.replace = replace; |
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return klp_enable_patch(&patch); |
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} |
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static void test_klp_atomic_replace_exit(void) |
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{ |
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} |
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module_init(test_klp_atomic_replace_init); |
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module_exit(test_klp_atomic_replace_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_INFO(livepatch, "Y"); |
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MODULE_AUTHOR("Joe Lawrence <[email protected]>"); |
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MODULE_DESCRIPTION("Livepatch test: atomic replace");
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