142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
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/*
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* Huawei struct layout randomize debugfs interface
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*
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* Copyright (c) 2018 Huawei co.ltd Copyright
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*
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* Authors:
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* yinyouzhan <yinyouzhan@huawei.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/err.h>
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/uaccess.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <asm/memory.h>
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#include <asm/module.h>
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#include <asm/sections.h>
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#ifdef CONFIG_GCC_PLUGIN_RANDSTRUCT_DEBUGFS
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static struct dentry *struct_rand_root;
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struct randdomize_struct_test_hw{
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unsigned long a1;
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unsigned char b2;
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unsigned int c3;
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unsigned long d4;
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unsigned char e5;
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unsigned long f6;
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unsigned char g7;
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unsigned int h8;
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unsigned long i9;
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unsigned char j10;
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} __randomize_layout;
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struct randdomize_ops_test_hw{
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void (*check)(void);
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void (*get_result)(void);
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void (*get_setting)(void);
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void (*set_setting)(void);
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};
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struct randdomize_struct_test_hw struct_randomize_sample = {
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.a1=1,
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.b2=2,
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.c3=3,
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.d4=4,
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.e5=5,
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.f6=6,
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.g7=7,
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.h8=8,
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.i9=9
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};
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struct randdomize_ops_test_hw ops_randomize_sample = {
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.check = NULL,
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.get_result = NULL,
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.get_setting = NULL,
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.set_setting = NULL
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};
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#define STRUCT_RAND_DEBUG_ENTRY(name) \
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static int struct_rand_##name##_open(struct inode *inode, struct file *file) \
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{ \
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return single_open(file, struct_rand_##name##_show, inode->i_private); \
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} \
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\
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static const struct file_operations struct_rand_##name##_fops = { \
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.owner = THIS_MODULE, \
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.open = struct_rand_##name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}
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static int struct_rand_offset_show(struct seq_file *m, void *v)
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{
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seq_printf(m,"--struct_randomize display--\n original structure define is:\n\
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struct randdomize_struct_test_hw{\n\
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unsigned long a1;\n\
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unsigned char b2;\n\
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unsigned int c3;\n\
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unsigned long d4;\n\
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unsigned char e5;\n\
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unsigned long f6;\n\
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unsigned char g7;\n\
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unsigned int h8;\n\
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unsigned long i9;\n\
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unsigned char j10;\n\
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}__randomize_layout;\n\,actual memory address:\na1_addr=0x%p ,b2_addr=0x%p ,c3_addr=0x%p ,d4_addr=0x%p, e5_addr=0x%p, f6_addr=0x%p, g7_addr=0x%p, h8_addr=0x%p, i9_addr=0x%p, j10_addr=0x%p-----\n",
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&struct_randomize_sample.a1,&struct_randomize_sample.b2,&struct_randomize_sample.c3,&struct_randomize_sample.d4,&struct_randomize_sample.e5,
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&struct_randomize_sample.f6,&struct_randomize_sample.g7,&struct_randomize_sample.h8,&struct_randomize_sample.i9,&struct_randomize_sample.j10);
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seq_printf(m,"--ops_randomize display--\n original ops define is:\n\
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struct randdomize_ops_test_hw{\n\
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void (*check)(void);\n\
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void (*get_result)(void);\n\
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void (*get_setting)(void);\n\
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void (*set_setting)(void);\n\
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}\n\,actual memory address:\ncheck=0x%p ,get_result=0x%p ,get_setting=0x%p ,set_setting=0x%p-----\n",
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&ops_randomize_sample.check,&ops_randomize_sample.get_result,&ops_randomize_sample.get_setting,&ops_randomize_sample.set_setting);
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return 0;
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}
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STRUCT_RAND_DEBUG_ENTRY(offset);
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static int __init struct_rand_debugfs_init(void)
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{
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/*create sys/kernel/debug/struct_rand for debugfs*/
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struct_rand_root = debugfs_create_dir("struct_rand", NULL);
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if (!struct_rand_root)
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return -ENOMEM;
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debugfs_create_file("offset",
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S_IRUGO,
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struct_rand_root,
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NULL,
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&struct_rand_offset_fops);
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return 0;
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}
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static void __exit struct_rand_debugfs_exit(void)
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{
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debugfs_remove(struct_rand_root);
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}
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module_init(struct_rand_debugfs_init);
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module_exit(struct_rand_debugfs_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("HUAWEI STRUCT LAYOUT RANDOMIZE DEBUGFS");
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#endif //CONFIG_GCC_PLUGIN_RANDSTRUCT_DEBUGFS
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