This source file includes following definitions.
- rodata_test
1
2
3
4
5
6
7
8 #define pr_fmt(fmt) "rodata_test: " fmt
9
10 #include <linux/uaccess.h>
11 #include <asm/sections.h>
12
13 static const int rodata_test_data = 0xC3;
14
15 void rodata_test(void)
16 {
17 unsigned long start, end;
18 int zero = 0;
19
20
21
22 if (!rodata_test_data) {
23 pr_err("test 1 fails (start data)\n");
24 return;
25 }
26
27
28 if (!probe_kernel_write((void *)&rodata_test_data,
29 (void *)&zero, sizeof(zero))) {
30 pr_err("test data was not read only\n");
31 return;
32 }
33
34
35 if (rodata_test_data == zero) {
36 pr_err("test data was changed\n");
37 return;
38 }
39
40
41 start = (unsigned long)__start_rodata;
42 end = (unsigned long)__end_rodata;
43 if (start & (PAGE_SIZE - 1)) {
44 pr_err("start of .rodata is not page size aligned\n");
45 return;
46 }
47 if (end & (PAGE_SIZE - 1)) {
48 pr_err("end of .rodata is not page size aligned\n");
49 return;
50 }
51
52 pr_info("all tests were successful\n");
53 }