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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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C
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758// SPDX-License-Identifier: GPL-2.0// Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com>
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>#include <linux/kernel.h>#include <linux/livepatch.h>
static int replace;module_param(replace, int, 0644);MODULE_PARM_DESC(replace, "replace (default=0)");
#include <linux/seq_file.h>static int livepatch_meminfo_proc_show(struct seq_file *m, void *v){ seq_printf(m, "%s: %s\n", THIS_MODULE->name, "this has been live patched"); return 0;}
static struct klp_func funcs[] = { { .old_name = "meminfo_proc_show", .new_func = livepatch_meminfo_proc_show, }, {}};
static struct klp_object objs[] = { { /* name being NULL means vmlinux */ .funcs = funcs, }, {}};
static struct klp_patch patch = { .mod = THIS_MODULE, .objs = objs, /* set .replace in the init function below for demo purposes */};
static int test_klp_atomic_replace_init(void){ patch.replace = replace; return klp_enable_patch(&patch);}
static void test_klp_atomic_replace_exit(void){}
module_init(test_klp_atomic_replace_init);module_exit(test_klp_atomic_replace_exit);MODULE_LICENSE("GPL");MODULE_INFO(livepatch, "Y");MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");MODULE_DESCRIPTION("Livepatch test: atomic replace");