| //===-- main.cpp ------------------------------------------------*- C++ -*-===// |
| //// |
| //// The LLVM Compiler Infrastructure |
| //// |
| //// This file is distributed under the University of Illinois Open Source |
| //// License. See LICENSE.TXT for details. |
| //// |
| ////===----------------------------------------------------------------------===// |
| // |
| |
| #include <cpuid.h> |
| #include <cstddef> |
| |
| int |
| main(int argc, char const *argv[]) |
| { |
| // PR_MPX_ENABLE_MANAGEMENT won't be defined on linux kernel versions below 3.19 |
| #ifndef PR_MPX_ENABLE_MANAGEMENT |
| return -1; |
| #endif |
| |
| // This call returns 0 only if the CPU and the kernel support Intel(R) MPX. |
| if (prctl(PR_MPX_ENABLE_MANAGEMENT, 0, 0, 0, 0) != 0) |
| return -1; |
| |
| // Run Intel(R) MPX test code. |
| #if defined(__x86_64__) |
| asm("mov $16, %rax\n\t" |
| "mov $9, %rdx\n\t" |
| "bndmk (%rax,%rdx), %bnd0\n\t" |
| "mov $32, %rax\n\t" |
| "mov $9, %rdx\n\t" |
| "bndmk (%rax,%rdx), %bnd1\n\t" |
| "mov $48, %rax\n\t" |
| "mov $9, %rdx\n\t" |
| "bndmk (%rax,%rdx), %bnd2\n\t" |
| "mov $64, %rax\n\t" |
| "mov $9, %rdx\n\t" |
| "bndmk (%rax,%rdx), %bnd3\n\t" |
| "bndstx %bnd3, (%rax) \n\t" |
| "nop\n\t"); |
| #endif |
| #if defined(__i386__) |
| asm("mov $16, %eax\n\t" |
| "mov $9, %edx\n\t" |
| "bndmk (%eax,%edx), %bnd0\n\t" |
| "mov $32, %eax\n\t" |
| "mov $9, %edx\n\t" |
| "bndmk (%eax,%edx), %bnd1\n\t" |
| "mov $48, %eax\n\t" |
| "mov $9, %edx\n\t" |
| "bndmk (%eax,%edx), %bnd2\n\t" |
| "mov $64, %eax\n\t" |
| "mov $9, %edx\n\t" |
| "bndmk (%eax,%edx), %bnd3\n\t" |
| "bndstx %bnd3, (%eax)\n\t" |
| "nop\n\t"); |
| #endif |
| asm("nop\n\t"); // Set a break point here. |
| |
| return 0; |
| } |
