1 //
2
3 #include <cpuid.h>
4 #include <cstddef>
5
6 int
main(int argc,char const * argv[])7 main(int argc, char const *argv[])
8 {
9 // PR_MPX_ENABLE_MANAGEMENT won't be defined on linux kernel versions below 3.19
10 #ifndef PR_MPX_ENABLE_MANAGEMENT
11 return -1;
12 #endif
13
14 // This call returns 0 only if the CPU and the kernel support Intel(R) MPX.
15 if (prctl(PR_MPX_ENABLE_MANAGEMENT, 0, 0, 0, 0) != 0)
16 return -1;
17
18 // Run Intel(R) MPX test code.
19 #if defined(__x86_64__)
20 asm("mov $16, %rax\n\t"
21 "mov $9, %rdx\n\t"
22 "bndmk (%rax,%rdx), %bnd0\n\t"
23 "mov $32, %rax\n\t"
24 "mov $9, %rdx\n\t"
25 "bndmk (%rax,%rdx), %bnd1\n\t"
26 "mov $48, %rax\n\t"
27 "mov $9, %rdx\n\t"
28 "bndmk (%rax,%rdx), %bnd2\n\t"
29 "mov $64, %rax\n\t"
30 "mov $9, %rdx\n\t"
31 "bndmk (%rax,%rdx), %bnd3\n\t"
32 "bndstx %bnd3, (%rax) \n\t"
33 "nop\n\t");
34 #endif
35 #if defined(__i386__)
36 asm("mov $16, %eax\n\t"
37 "mov $9, %edx\n\t"
38 "bndmk (%eax,%edx), %bnd0\n\t"
39 "mov $32, %eax\n\t"
40 "mov $9, %edx\n\t"
41 "bndmk (%eax,%edx), %bnd1\n\t"
42 "mov $48, %eax\n\t"
43 "mov $9, %edx\n\t"
44 "bndmk (%eax,%edx), %bnd2\n\t"
45 "mov $64, %eax\n\t"
46 "mov $9, %edx\n\t"
47 "bndmk (%eax,%edx), %bnd3\n\t"
48 "bndstx %bnd3, (%eax)\n\t"
49 "nop\n\t");
50 #endif
51 asm("nop\n\t"); // Set a break point here.
52
53 return 0;
54 }
55