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60650f2e WT |
1 | /* Test program for MPX registers. |
2 | ||
42a4f53d | 3 | Copyright 2013-2019 Free Software Foundation, Inc. |
60650f2e WT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <stdio.h> | |
8b600ba2 | 21 | #include "x86-cpuid.h" |
60650f2e WT |
22 | |
23 | #ifndef NOINLINE | |
24 | #define NOINLINE __attribute__ ((noinline)) | |
25 | #endif | |
26 | ||
27 | unsigned int have_mpx (void) NOINLINE; | |
28 | ||
29 | unsigned int NOINLINE | |
30 | have_mpx (void) | |
31 | { | |
32 | unsigned int eax, ebx, ecx, edx; | |
33 | ||
34 | if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx)) | |
35 | return 0; | |
36 | ||
37 | if ((ecx & bit_OSXSAVE) == bit_OSXSAVE) | |
422d944b WT |
38 | { |
39 | if (__get_cpuid_max (0, NULL) < 7) | |
40 | return 0; | |
60650f2e | 41 | |
422d944b | 42 | __cpuid_count (7, 0, eax, ebx, ecx, edx); |
60650f2e | 43 | |
422d944b WT |
44 | if ((ebx & bit_MPX) == bit_MPX) |
45 | return 1; | |
46 | else | |
47 | return 0; | |
48 | } | |
547a646d | 49 | return 0; |
60650f2e WT |
50 | } |
51 | ||
52 | int | |
53 | main (int argc, char **argv) | |
54 | { | |
55 | if (have_mpx ()) | |
56 | { | |
57 | #ifdef __x86_64__ | |
58 | asm ("mov $10, %rax\n\t" | |
59 | "mov $9, %rdx\n\t" | |
60 | "bndmk (%rax,%rdx), %bnd0\n\t" | |
61 | "mov $20, %rax\n\t" | |
62 | "mov $9, %rdx\n\t" | |
63 | "bndmk (%rax,%rdx), %bnd1\n\t" | |
64 | "mov $30, %rax\n\t" | |
65 | "mov $9, %rdx\n\t" | |
66 | "bndmk (%rax,%rdx), %bnd2\n\t" | |
67 | "mov $40, %rax\n\t" | |
68 | "mov $9, %rdx\n\t" | |
69 | "bndmk (%rax,%rdx), %bnd3\n\t" | |
70 | "bndstx %bnd3, (%rax) \n\t" | |
71 | "nop\n\t" | |
72 | ); | |
73 | #else | |
74 | asm ("mov $10, %eax\n\t" | |
75 | "mov $9, %edx\n\t" | |
76 | "bndmk (%eax,%edx), %bnd0\n\t" | |
77 | "mov $20, %eax\n\t" | |
78 | "mov $9, %edx\n\t" | |
79 | "bndmk (%eax,%edx), %bnd1\n\t" | |
80 | "mov $30, %eax\n\t" | |
81 | "mov $9, %edx\n\t" | |
82 | "bndmk (%eax,%edx), %bnd2\n\t" | |
83 | "mov $40, %eax\n\t" | |
84 | "mov $9, %edx\n\t" | |
85 | "bndmk (%eax,%edx), %bnd3\n\t" | |
86 | "bndstx %bnd3, (%eax)\n\t" | |
87 | "nop\n\t" | |
88 | ); | |
89 | #endif | |
90 | asm ("nop\n\t"); /* break here. */ | |
91 | } | |
92 | return 0; | |
93 | } |