/* Test for inferior function calls MPX context.

   Copyright (C) 2017 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */

#include <stdlib.h>
#include <string.h>
#include "x86-cpuid.h"

/* Defined size for arrays.  */
#define ARRAY_LENGTH    5

unsigned int
have_mpx (void)
{
  unsigned int eax, ebx, ecx, edx;

  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
    return 0;

  if ((ecx & bit_OSXSAVE) == bit_OSXSAVE)
    {
      if (__get_cpuid_max (0, NULL) < 7)
	return 0;

      __cpuid_count (7, 0, eax, ebx, ecx, edx);

      if ((ebx & bit_MPX) == bit_MPX)
	return 1;
      else
	return 0;
    }
  return 0;
}


int
upper (int *a, int *b, int *c, int *d, int len)
{
  int value;

  value = *(a + len);
  value = *(b + len);
  value = *(c + len);
  value = *(d + len);

  value = value - *a + 1;
  return value;
}


int
lower (int *a, int *b, int *c, int *d, int len)
{
  int value;

  value = *(a - len);
  value = *(b - len);
  value = *(c - len);
  value = *(d - len);

  value = value - *a + 1;
  return value;
}


char
char_upper (char *str, int length)
{
  char ch;
  ch = *(str + length);

  return ch;
}


char
char_lower (char *str, int length)
{
  char ch;
  ch = *(str - length);

  return ch;
}


int
main (void)
{
  if (have_mpx ())
    {
      int sa[ARRAY_LENGTH];
      int sb[ARRAY_LENGTH];
      int sc[ARRAY_LENGTH];
      int sd[ARRAY_LENGTH];
      int *x, *a, *b, *c, *d;
      char mchar;
      char hello[] = "Hello";

      x = malloc (sizeof (int) * ARRAY_LENGTH);
      a = malloc (sizeof (int) * ARRAY_LENGTH);
      b = malloc (sizeof (int) * ARRAY_LENGTH);
      c = malloc (sizeof (int) * ARRAY_LENGTH);
      d = malloc (sizeof (int) * ARRAY_LENGTH);

      *x = upper (sa, sb, sc, sd, 0);  /* bkpt 1.  */
      *x = lower (a, b, c, d, 0);

      mchar = char_upper (hello, 10);
      mchar = char_lower (hello, 10);

      free (x);
      free (a);
      free (b);
      free (c);
      free (d);
    }
  return 0;
}
