1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/* Test for inferior function calls MPX context.
Copyright (C) 2017-2018 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;
}
|
