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94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/* Test program for MPX registers.
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Copyright 2013-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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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 as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include "x86-cpuid.h"
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#ifndef NOINLINE
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#define NOINLINE __attribute__ ((noinline))
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#endif
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unsigned int have_mpx (void) NOINLINE;
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unsigned int NOINLINE
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have_mpx (void)
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{
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unsigned int eax, ebx, ecx, edx;
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if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
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return 0;
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if ((ecx & bit_OSXSAVE) == bit_OSXSAVE)
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{
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if (__get_cpuid_max (0, NULL) < 7)
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return 0;
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__cpuid_count (7, 0, eax, ebx, ecx, edx);
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if ((ebx & bit_MPX) == bit_MPX)
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return 1;
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else
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return 0;
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}
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return 0;
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}
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int
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main (int argc, char **argv)
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{
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if (have_mpx ())
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{
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#ifdef __x86_64__
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asm ("mov $10, %rax\n\t"
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"mov $9, %rdx\n\t"
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"bndmk (%rax,%rdx), %bnd0\n\t"
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"mov $20, %rax\n\t"
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"mov $9, %rdx\n\t"
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"bndmk (%rax,%rdx), %bnd1\n\t"
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"mov $30, %rax\n\t"
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"mov $9, %rdx\n\t"
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"bndmk (%rax,%rdx), %bnd2\n\t"
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"mov $40, %rax\n\t"
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"mov $9, %rdx\n\t"
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"bndmk (%rax,%rdx), %bnd3\n\t"
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"bndstx %bnd3, (%rax) \n\t"
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"nop\n\t"
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);
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#else
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asm ("mov $10, %eax\n\t"
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"mov $9, %edx\n\t"
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"bndmk (%eax,%edx), %bnd0\n\t"
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"mov $20, %eax\n\t"
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"mov $9, %edx\n\t"
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"bndmk (%eax,%edx), %bnd1\n\t"
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"mov $30, %eax\n\t"
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"mov $9, %edx\n\t"
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"bndmk (%eax,%edx), %bnd2\n\t"
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"mov $40, %eax\n\t"
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"mov $9, %edx\n\t"
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"bndmk (%eax,%edx), %bnd3\n\t"
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"bndstx %bnd3, (%eax)\n\t"
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"nop\n\t"
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);
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#endif
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asm ("nop\n\t"); /* break here. */
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}
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return 0;
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}
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