29c1c24429
Intel(R) Memory protection bound information are located in register
to be tested using the MPX new instructions. Since the number of
bound registers are limited a table is used to provide storage for
bounds during run-time.
In order to investigate the contents of the MPX bound table two new
commands are added to GDB. "show mpx bound" and "set mpx bound" are
used to display and set values on the MPX bound table.
2015-04-20 Walfred Tedeschi <walfred.tedeschi@intel.com>
Mircea Gherzan <mircea.gherzan@intel.com>
* i386-tdep.c (MPX_BASE_MASK, MPX_BD_MASK, MPX_BT_MASK, MPX_BD_MASK_32,
MPX_BT_MASK_32): New macros.
(i386_mpx_set_bounds): New function that implements
the command "set-mpx-bound".
(i386_mpx_enabled) Helper function to test MPX availability.
(i386_mpx_bd_base) Helper function to calculate the base directory
address. (i386_mpx_get_bt_entry) Helper function to access a bound
table entry. (i386_mpx_print_bounds) Effectively display bound
information. (_initialize_i386_tdep): Qdd new commands
to commands "set mpx" and "show mpx". (_initialize_i386_tdep):
Add "bound" to the commands "show mpx" and "set mpx" commands.
(mpx_set_cmdlist and mpx_show_cmdlist):
list for the new prefixed "set mpx" and "show mpx" commands.
* NEWS: List new commands for MPX support.
testsuite:
* gdb.arch/i386-mpx-map.c: New file.
* gdb.arch/i386-mpx-map.exp: New File.
doc:
* gdb.texinfo (i386): Add documentation about "show mpx bound"
and "set mpx bound".
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* Test program for MPX map allocated bounds.
|
|
|
|
Copyright 2015 Free Software Foundation, Inc.
|
|
|
|
Contributed by Intel Corp. <walfred.tedeschi@intel.com>
|
|
<mircea.gherzan@intel.com>
|
|
|
|
This file is part of GDB.
|
|
|
|
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 "x86-cpuid.h"
|
|
|
|
#ifndef NOINLINE
|
|
#define NOINLINE __attribute__ ((noinline))
|
|
#endif
|
|
|
|
#define SIZE 5
|
|
|
|
typedef int T;
|
|
|
|
unsigned int have_mpx (void) NOINLINE;
|
|
|
|
unsigned int NOINLINE
|
|
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;
|
|
}
|
|
|
|
void
|
|
foo (T *p)
|
|
{
|
|
T *x;
|
|
|
|
#if defined __GNUC__ && !defined __INTEL_COMPILER
|
|
__bnd_store_ptr_bounds (p, &p);
|
|
#endif
|
|
|
|
x = p + SIZE - 1;
|
|
|
|
#if defined __GNUC__ && !defined __INTEL_COMPILER
|
|
__bnd_store_ptr_bounds (x, &x);
|
|
#endif
|
|
|
|
return; /* after-assign */
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
if (have_mpx ())
|
|
{
|
|
T *a = NULL;
|
|
|
|
a = calloc (SIZE, sizeof (T)); /* after-decl */
|
|
#if defined __GNUC__ && !defined __INTEL_COMPILER
|
|
__bnd_store_ptr_bounds (a, &a);
|
|
#endif
|
|
|
|
foo (a); /* after-alloc */
|
|
free (a);
|
|
}
|
|
return 0;
|
|
}
|