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Makefile.def: Add libmpx.

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* Makefile.def: Add libmpx.
	* configure.ac: Add libmpx.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

gcc/

	* config/i386/linux-common.h (LIBMPX_LIBS): New.
	(LIBMPX_SPEC): New.
	(CHKP_SPEC): New.
	* gcc.c (CHKP_SPEC): New.
	(LINK_COMMAND_SPEC): Add CHKP_SPEC.
	* c-family/c.opt (static-libmpx): New.

libmpx/

	Initial commit.

From-SVN: r221311
This commit is contained in:
Ilya Enkovich 2015-03-10 09:37:41 +00:00 • committed by Ilya Enkovich
parent 5a43417885
commit 5373cd33a8
27 changed files with 22045 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
ChangeLog
View file

@ -1,3 +1,10 @@
2015-03-10 Ilya Enkovich <ilya.enkovich@intel.com>
* Makefile.def: Add libmpx.
* configure.ac: Add libmpx.
* Makefile.in: Regenerate.
* configure: Regenerate.
2015-03-06 Kirill Yukhin <kirill.yukhin@intel.com>
* MAINTAINERS (CPU Port Maintainers): Add myself

3
Makefile.def
View file

@ -130,6 +130,9 @@ target_modules = { module= libsanitizer;
bootstrap=true;
lib_path=.libs;
raw_cxx=true; };
target_modules = { module= libmpx;
bootstrap=true;
lib_path=.libs; };
target_modules = { module= libvtv;
bootstrap=true;
lib_path=.libs;

1018
Makefile.in
View file

File diff suppressed because it is too large Load diff

30
configure vendored
View file

@ -2751,6 +2751,7 @@ target_libraries="target-libgcc \
target-libstdc++-v3 \
target-libsanitizer \
target-libvtv \
target-libmpx \
target-libssp \
target-libquadmath \
target-libgfortran \
@ -3290,6 +3291,30 @@ $as_echo "yes" >&6; }
fi
fi
# Enable libmpx on supported systems by request.
if test -d ${srcdir}/libmpx; then
if test x$enable_libmpx = xyes; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libmpx support" >&5
$as_echo_n "checking for libmpx support... " >&6; }
if (srcdir=${srcdir}/libmpx; \
. ${srcdir}/configure.tgt; \
test "$LIBMPX_SUPPORTED" != "yes")
then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
noconfigdirs="$noconfigdirs target-libmpx"
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
fi
else
noconfigdirs="$noconfigdirs target-libmpx"
fi
fi
# Disable libquadmath for some systems.
case "${target}" in
avr-*-*)
@ -7032,6 +7057,11 @@ if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
fi
# If we are building libmpx, bootstrap it.
if echo " ${target_configdirs} " | grep " libmpx " > /dev/null 2>&1; then
bootstrap_target_libs=${bootstrap_target_libs}target-libmpx,
fi
# Determine whether gdb needs tk/tcl or not.
# Use 'maybe' since enable_gdbtk might be true even if tk isn't available
# and in that case we want gdb to be built without tk. Ugh!

27
configure.ac
View file

@ -162,6 +162,7 @@ target_libraries="target-libgcc \
target-libstdc++-v3 \
target-libsanitizer \
target-libvtv \
target-libmpx \
target-libssp \
target-libquadmath \
target-libgfortran \
@ -640,6 +641,27 @@ if test -d ${srcdir}/libvtv; then
fi
fi
# Enable libmpx on supported systems by request.
if test -d ${srcdir}/libmpx; then
if test x$enable_libmpx = xyes; then
AC_MSG_CHECKING([for libmpx support])
if (srcdir=${srcdir}/libmpx; \
. ${srcdir}/configure.tgt; \
test "$LIBMPX_SUPPORTED" != "yes")
then
AC_MSG_RESULT([no])
noconfigdirs="$noconfigdirs target-libmpx"
else
AC_MSG_RESULT([yes])
fi
else
noconfigdirs="$noconfigdirs target-libmpx"
fi
fi
# Disable libquadmath for some systems.
case "${target}" in
avr-*-*)
@ -2672,6 +2694,11 @@ if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
fi
# If we are building libmpx, bootstrap it.
if echo " ${target_configdirs} " | grep " libmpx " > /dev/null 2>&1; then
bootstrap_target_libs=${bootstrap_target_libs}target-libmpx,
fi
# Determine whether gdb needs tk/tcl or not.
# Use 'maybe' since enable_gdbtk might be true even if tk isn't available
# and in that case we want gdb to be built without tk. Ugh!

9
gcc/ChangeLog
View file

@ -1,3 +1,12 @@
2015-03-10 Ilya Enkovich <ilya.enkovich@intel.com>
* config/i386/linux-common.h (LIBMPX_LIBS): New.
(LIBMPX_SPEC): New.
(CHKP_SPEC): New.
* gcc.c (CHKP_SPEC): New.
(LINK_COMMAND_SPEC): Add CHKP_SPEC.
* c-family/c.opt (static-libmpx): New.
2015-03-10 Richard Biener <rguenther@suse.de>
PR middle-end/44563

3
gcc/c-family/c.opt
View file

@ -1041,6 +1041,9 @@ fchkp-instrument-marked-only
C ObjC C++ ObjC++ LTO Report Var(flag_chkp_instrument_marked_only) Init(0)
Instrument only functions marked with bnd_instrument attribute.
static-libmpx
Driver
fcilkplus
C ObjC C++ ObjC++ LTO Report Var(flag_cilkplus) Init(0)
Enable Cilk Plus

24
gcc/config/i386/linux-common.h
View file

@ -53,3 +53,27 @@ along with GCC; see the file COPYING3. If not see
GNU_USER_TARGET_ENDFILE_SPEC, \
GNU_USER_TARGET_MATHFILE_SPEC " " \
ANDROID_ENDFILE_SPEC)
#ifndef LIBMPX_LIBS
#define LIBMPX_LIBS "\
%:include(libmpx.spec)%(link_libmpx)"
#endif
#ifndef LIBMPX_SPEC
#if defined(HAVE_LD_STATIC_DYNAMIC)
#define LIBMPX_SPEC "\
%{mmpx:%{fcheck-pointer-bounds:\
%{static:--whole-archive -lmpx --no-whole-archive" LIBMPX_LIBS "}\
%{!static:%{static-libmpx:" LD_STATIC_OPTION " --whole-archive}\
-lmpx %{static-libmpx:--no-whole-archive " LD_DYNAMIC_OPTION \
LIBMPX_LIBS "}}}}"
#else
#define LIBMPX_SPEC "\
%{mmpx:%{fcheck-pointer-bounds:-lmpx" LIBMPX_LIBS "}}"
#endif
#endif
#ifndef CHKP_SPEC
#define CHKP_SPEC "\
%{!nostdlib:%{!nodefaultlibs:" LIBMPX_SPEC "}}"
#endif

5
gcc/gcc.c
View file

@ -812,6 +812,10 @@ proper position among the other output files. */
%{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}"
#endif
#ifndef CHKP_SPEC
#define CHKP_SPEC ""
#endif
/* -u* was put back because both BSD and SysV seem to support it. */
/* %{static:} simply prevents an error message if the target machine
doesn't handle -static. */
@ -832,6 +836,7 @@ proper position among the other output files. */
"%X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
%{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
" CHKP_SPEC " \
%{fopenacc|fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
%{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
%{fgnu-tm:%:include(libitm.spec)%(link_itm)}\

3
libmpx/ChangeLog Normal file
View file

@ -0,0 +1,3 @@
2015-03-10 Ilya Enkovich <ilya.enkovich@intel.com>
Initial commit.

47
libmpx/Makefile.am Normal file
View file

@ -0,0 +1,47 @@
ACLOCAL_AMFLAGS = -I .. -I ../config
if LIBMPX_SUPPORTED
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643
libmpx/Makefile.in Normal file
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@ -0,0 +1,643 @@
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# Add --enable-maintainer-mode option to configure. -*- Autoconf -*-
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# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
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# Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2008
# Free Software Foundation, Inc.
#
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# gives unlimited permission to copy and/or distribute it,
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AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
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m4_include([../config/acx.m4])
m4_include([../config/lead-dot.m4])
m4_include([../config/libstdc++-raw-cxx.m4])
m4_include([../config/multi.m4])
m4_include([../config/override.m4])
m4_include([../libtool.m4])
m4_include([../ltoptions.m4])
m4_include([../ltsugar.m4])
m4_include([../ltversion.m4])
m4_include([../lt~obsolete.m4])

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/* config.h.in. Generated from configure.ac by autoheader. */
/* Define to 1 if you have the <dlfcn.h> header file. */
#undef HAVE_DLFCN_H
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H
/* Define to 1 if you have the `secure_getenv' function. */
#undef HAVE_SECURE_GETENV
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H
/* Define to 1 if you have the <stdlib.h> header file. */
#undef HAVE_STDLIB_H
/* Define to 1 if you have the <strings.h> header file. */
#undef HAVE_STRINGS_H
/* Define to 1 if you have the <string.h> header file. */
#undef HAVE_STRING_H
/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H
/* Define to 1 if you have the <sys/types.h> header file. */
#undef HAVE_SYS_TYPES_H
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H
/* Define to the sub-directory in which libtool stores uninstalled libraries.
*/
#undef LT_OBJDIR
/* Define to 1 if your C compiler doesn't accept -c and -o together. */
#undef NO_MINUS_C_MINUS_O
/* Name of package */
#undef PACKAGE
/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT
/* Define to the full name of this package. */
#undef PACKAGE_NAME
/* Define to the full name and version of this package. */
#undef PACKAGE_STRING
/* Define to the one symbol short name of this package. */
#undef PACKAGE_TARNAME
/* Define to the home page for this package. */
#undef PACKAGE_URL
/* Define to the version of this package. */
#undef PACKAGE_VERSION
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
/* Enable extensions on AIX 3, Interix. */
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE
#endif
/* Enable GNU extensions on systems that have them. */
#ifndef _GNU_SOURCE
# undef _GNU_SOURCE
#endif
/* Enable threading extensions on Solaris. */
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif
/* Enable extensions on HP NonStop. */
#ifndef _TANDEM_SOURCE
# undef _TANDEM_SOURCE
#endif
/* Enable general extensions on Solaris. */
#ifndef __EXTENSIONS__
# undef __EXTENSIONS__
#endif
/* Version number of package */
#undef VERSION
/* Define to 1 if on MINIX. */
#undef _MINIX
/* Define to 2 if the system does not provide POSIX.1 features except with
this defined. */
#undef _POSIX_1_SOURCE
/* Define to 1 if you need to in order for `stat' and other things to work. */
#undef _POSIX_SOURCE

17538
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133
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@ -0,0 +1,133 @@
# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ([2.64])
AC_INIT(package-unused, version-unused, libmpx)
# -------
# Options
# -------
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE(version-specific-runtime-libs,
[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
[case "$enableval" in
yes) version_specific_libs=yes ;;
no) version_specific_libs=no ;;
*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
esac],
[version_specific_libs=no])
AC_MSG_RESULT($version_specific_libs)
# Do not delete or change the following two lines. For why, see
# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
AC_CANONICAL_SYSTEM
target_alias=${target_alias-$host_alias}
AC_SUBST(target_alias)
GCC_LIBSTDCXX_RAW_CXX_FLAGS
# See if supported.
unset LIBMPX_SUPPORTED
AC_MSG_CHECKING([for target support for Intel MPX runtime library])
echo "int i[sizeof (void *) == 4 ? 1 : -1] = { __x86_64__ };" > conftest.c
if AC_TRY_COMMAND([${CC} ${CFLAGS} -c -o conftest.o conftest.c 1>&AS_MESSAGE_LOG_FD])
then
LIBMPX_SUPPORTED=no
else
LIBMPX_SUPPORTED=yes
fi
rm -f conftest.o conftest.c
AC_MSG_RESULT($LIBMPX_SUPPORTED)
AM_CONDITIONAL(LIBMPX_SUPPORTED, [test "x$LIBMPX_SUPPORTED" = "xyes"])
link_libmpx="-lpthread"
AC_SUBST(link_libmpx)
AM_INIT_AUTOMAKE(foreign no-dist no-dependencies)
AM_ENABLE_MULTILIB(, ..)
AM_MAINTAINER_MODE
AC_GNU_SOURCE
AC_CHECK_FUNCS([secure_getenv])
# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${version_specific_libs} in
yes)
# Need the gcc compiler version to know where to install libraries
# and header files if --enable-version-specific-runtime-libs option
# is selected.
toolexecdir='$(libdir)/gcc/$(target_alias)'
toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
;;
no)
if test -n "$with_cross_host" &&
test x"$with_cross_host" != x"no"; then
# Install a library built with a cross compiler in tooldir, not libdir.
toolexecdir='$(exec_prefix)/$(target_alias)'
toolexeclibdir='$(toolexecdir)/lib'
else
toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
toolexeclibdir='$(libdir)'
fi
multi_os_directory=`$CC -print-multi-os-directory`
case $multi_os_directory in
.) ;; # Avoid trailing /.
*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
esac
;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)
# Check for programs.
m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
AC_PROG_CC
AC_PROG_CXX
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
AM_PROG_CC_C_O
AC_SUBST(CFLAGS)
# Newer automakes demand CCAS and CCASFLAGS.
: ${CCAS='$(CC)'}
: ${CCASFLAGS='$(CFLAGS)'}
AC_SUBST(CCAS)
AC_SUBST(CCASFLAGS)
AC_CHECK_TOOL(AS, as)
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, :)
# Configure libtool
AC_LIBTOOL_DLOPEN
AM_PROG_LIBTOOL
AC_SUBST(enable_shared)
AC_SUBST(enable_static)
XCFLAGS="-Wall -Wextra"
AC_SUBST(XCFLAGS)
if test "${multilib}" = "yes"; then
multilib_arg="--enable-multilib"
else
multilib_arg=
fi
AC_CONFIG_FILES([Makefile libmpx.spec])
AC_CONFIG_HEADERS(config.h)
AC_CONFIG_FILES(AC_FOREACH([DIR], [mpxrt], [DIR/Makefile]),
[cat > vpsed$$ << \_EOF
s!`test -f '$<' || echo '$(srcdir)/'`!!
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sed -f vpsed$$ $ac_file > tmp$$
mv tmp$$ $ac_file
rm vpsed$$
echo 'MULTISUBDIR =' >> $ac_file
ml_norecursion=yes
. ${multi_basedir}/config-ml.in
AS_UNSET([ml_norecursion])
])
AC_OUTPUT

29
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@ -0,0 +1,29 @@
# -*- shell-script -*-
# Copyright (C) 2014 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 2 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/>.
# This is the target specific configuration file. This is invoked by the
# autoconf generated configure script. Putting it in a separate shell file
# lets us skip running autoconf when modifying target specific information.
# Filter out unsupported systems.
LIBMPX_SUPPORTED=no
case "${target}" in
x86_64-*-linux* | i?86-*-linux*)
LIBMPX_SUPPORTED=yes
;;
*)
;;
esac

3
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@ -0,0 +1,3 @@
# This spec file is read by gcc when linking. It is used to specify the
# standard libraries we need in order to link with libcilkrts.
*link_libmpx: @link_libmpx@

6
libmpx/libtool-version Normal file
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@ -0,0 +1,6 @@
# This file is used to maintain libtool version info for libmpx. See
# the libtool manual to understand the meaning of the fields. This is
# a separate file so that version updates don't involve re-running
# automake.
# CURRENT:REVISION:AGE
0:0:0

60
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ACLOCAL_AMFLAGS = -I $(top_srcdir) -I $(top_srcdir)/config
if LIBMPX_SUPPORTED
# May be used by toolexeclibdir.
gcc_version := $(shell cat $(top_srcdir)/../gcc/BASE-VER)
AM_CPPFLAGS = -I$(top_srcdir)/..
AM_CFLAGS = $(XCFLAGS)
toolexeclib_LTLIBRARIES = libmpx.la
libmpx_la_SOURCES = mpxrt.c mpxrt-utils.c
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libmpx_la_DEPENDENCIES = libmpx.map
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};

6
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# This file is used to maintain libtool version info for libmpx. See
# the libtool manual to understand the meaning of the fields. This is
# a separate file so that version updates don't involve re-running
# automake.
# CURRENT:REVISION:AGE
1:0:0

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/* mpxrt-utils.c -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2014, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
#define __STDC_FORMAT_MACROS
#include "config.h"
#include <inttypes.h>
#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <pthread.h>
#include "mpxrt-utils.h"
#ifndef HAVE_SECURE_GETENV
#define secure_getenv __secure_getenv
#endif
#define MPX_RT_OUT "CHKP_RT_OUT_FILE"
#define MPX_RT_ERR "CHKP_RT_ERR_FILE"
#define MPX_RT_VERBOSE "CHKP_RT_VERBOSE"
#define MPX_RT_VERBOSE_DEFAULT VERB_BR
#define MPX_RT_MODE "CHKP_RT_MODE"
#define MPX_RT_MODE_DEFAULT MPX_RT_COUNT
#define MPX_RT_MODE_DEFAULT_STR "count"
#define MPX_RT_HELP "CHKP_RT_HELP"
#define MPX_RT_ADDPID "CHKP_RT_ADDPID"
#define MPX_RT_BNDPRESERVE "CHKP_RT_BNDPRESERVE"
#define MPX_RT_BNDPRESERVE_DEFAULT 0
#define MPX_RT_PRINT_SUMMARY "CHKP_RT_PRINT_SUMMARY"
#define MAX_FILE_NAME PATH_MAX
typedef struct env_var_s {
char *env_name;
char *env_val;
struct env_var_s *next;
} env_var_t;
typedef struct {
env_var_t *first;
env_var_t *last;
} env_var_list_t;
/* Following vars are initialized at process startup only
and thus are considered to be thread safe. */
static int summary;
static int add_pid;
static mpx_rt_mode_t mode;
static env_var_list_t env_var_list;
static verbose_type verbose_val;
static FILE *out;
static FILE *err;
static char out_name[MAX_FILE_NAME];
static char err_name[MAX_FILE_NAME];
/* Following vars are read at process finalization only.
All write accesses use the same value and thus are
considered to be thread safe. */
static int out_file_dirty;
static int err_file_dirty;
static int files_overwritten;
/* Mutex used to sync output. */
static pthread_mutex_t lock;
static void *
malloc_check (size_t size)
{
void *res = malloc (size);
if (!res)
__mpxrt_print (VERB_ERROR, "Couldn't allocate %zu bytes.", size);
else
memset (res, 0, size);
return res;
}
static void
env_var_list_add (const char* env, const char* val)
{
env_var_t* n;
if (val == 0)
return;
n = (env_var_t *)malloc_check (sizeof (env_var_t));
if (!n)
return;
if (env_var_list.first == 0)
env_var_list.first = n;
if (env_var_list.last)
env_var_list.last->next = n;
env_var_list.last = n;
n->env_name = (char *)malloc_check (strlen (env) + 1);
n->env_val = (char *)malloc_check (strlen (val) + 1);
if (!n->env_name || !n->env_val)
return;
strcpy (n->env_name, env);
strcpy (n->env_val, val);
}
static void
set_file_stream (FILE** file, char* file_name,
const char* env, FILE* deflt)
{
int pid;
if (env != 0)
{
if (add_pid)
{
pid = getpid ();
snprintf (file_name, MAX_FILE_NAME, "%s.%d", env, pid);
}
else
snprintf (file_name, MAX_FILE_NAME, "%s", env);
*file = fopen (file_name, "we");
if (*file != 0)
return;
}
*file = deflt;
}
/*
* this function will be called after fork in the child
* open new files with pid of the process
*/
static void
open_child_files ()
{
char *out_env;
char *err_env;
out_env = secure_getenv (MPX_RT_OUT);
err_env = secure_getenv (MPX_RT_ERR);
if (add_pid == 0 && (out_env != 0 || err_env != 0))
{
__mpxrt_print (VERB_ERROR, "MPX RUNTIME WARNING: out/err files are "
"overwritten in new processes since %s was not set.\n",
MPX_RT_ADDPID);
files_overwritten = 1;
}
set_file_stream (&out, out_name, out_env, stdout);
if (out_env == 0 || err_env == 0 || (strcmp (out_env, err_env) != 0))
set_file_stream (&err, err_name, err_env, stderr);
else
/* in case we get the same file name for err and out */
err = out;
}
/*
* this function is called after fork in the parent
*/
static void
at_fork_check (void)
{
char *out_env;
char *err_env;
out_env = secure_getenv (MPX_RT_OUT);
err_env = secure_getenv (MPX_RT_ERR);
if (add_pid == 0 && (out_env != 0 || err_env != 0))
files_overwritten = 1;
}
static mpx_rt_mode_t
set_mpx_rt_mode (const char *env)
{
if (env == 0)
return MPX_RT_MODE_DEFAULT;
else if (strcmp (env, "stop") == 0)
return MPX_RT_STOP;
else if (strcmp (env,"count") == 0)
return MPX_RT_COUNT;
{
__mpxrt_print (VERB_ERROR, "Illegal value '%s' for %s. Legal values are"
"[stop | count]\nUsing default value %s\n",
env, MPX_RT_MODE, MPX_RT_MODE_DEFAULT_STR);
return MPX_RT_MODE_DEFAULT;
}
}
static void
print_help (void)
{
fprintf (out, "MPX Runtime environment variables help.\n");
fprintf (out, "%s \t set output file for info & debug [default: stdout]\n",
MPX_RT_OUT);
fprintf (out, "%s \t set output file for error [default: stderr]\n",
MPX_RT_ERR);
fprintf (out, "%s \t set verbosity type [default: %d]\n"
"\t\t\t 0 - print only internal run time errors\n"
"\t\t\t 1 - just print summary\n"
"\t\t\t 2 - print summary and bound violation information\n "
"\t\t\t 3 - print debug information\n",
MPX_RT_VERBOSE, MPX_RT_VERBOSE_DEFAULT);
fprintf (out, "%s \t\t set MPX runtime behavior on #BR exception."
" [stop | count]\n"
"\t\t\t [default: %s]\n", MPX_RT_MODE, MPX_RT_MODE_DEFAULT_STR);
fprintf (out, "%s \t\t generate out,err file for each process.\n"
"\t\t\t generated file will be MPX_RT_{OUT,ERR}_FILE.pid\n"
"\t\t\t [default: no]\n", MPX_RT_ADDPID);
fprintf (out, "%s \t set value for BNDPRESERVE bit.\n"
"\t\t\t BNDPRESERVE = 0 flush bounds on unprefixed call/ret/jmp\n"
"\t\t\t BNDPRESERVE = 1 do NOT flush bounds\n"
"\t\t\t [default: %d]\n", MPX_RT_BNDPRESERVE,
MPX_RT_BNDPRESERVE_DEFAULT);
fprintf (out, "%s \t print summary at the end of the run\n"
"\t\t\t [default: no]\n", MPX_RT_PRINT_SUMMARY);
fprintf (out, "%s \t\t print this help and exit.\n"
"\t\t\t [default: no]\n", MPX_RT_HELP);
exit (0);
}
static void
validate_bndpreserve (const char *env, int *bndpreserve)
{
if (env == 0)
bndpreserve = MPX_RT_BNDPRESERVE_DEFAULT;
else if (strcmp (env, "0") == 0)
*bndpreserve = 0;
else if (strcmp (env, "1") == 0)
*bndpreserve = 1;
else
{
__mpxrt_print (VERB_ERROR, "Illegal value '%s' for %s. Legal values "
"are [0 | 1]\nUsing default value %d\n",
env, MPX_RT_BNDPRESERVE, MPX_RT_BNDPRESERVE_DEFAULT);
*bndpreserve = MPX_RT_BNDPRESERVE_DEFAULT;
}
}
static verbose_type
init_verbose_val (const char *env)
{
if (env == 0)
return MPX_RT_VERBOSE_DEFAULT;
else if (strcmp(env, "0") == 0)
return VERB_ERROR;
else if (strcmp(env, "1") == 0)
return VERB_INFO;
else if (strcmp(env, "2") == 0)
return VERB_BR;
else if (strcmp(env, "3") == 0)
return VERB_DEBUG;
__mpxrt_print (VERB_ERROR, "Illegal value '%s' for %s. Legal values "
"are [0..3]\nUsing default value %d\n",
env, MPX_RT_VERBOSE, (int)MPX_RT_VERBOSE_DEFAULT);
return MPX_RT_VERBOSE_DEFAULT;
}
static void
env_var_print_summary (void)
{
env_var_t* node;
__mpxrt_print (VERB_DEBUG, "Used environment variables:\n");
node = env_var_list.first;
while (node != 0)
{
__mpxrt_print (VERB_DEBUG, " %s = %s\n", node->env_name, node->env_val);
node = node->next;
}
}
/* Return 1 if passes env var value should enable feature. */
static int
check_yes (const char *val)
{
return val && (!strcmp (val, "yes") || !strcmp (val, "1"));
}
void
__mpxrt_init_env_vars (int* bndpreserve)
{
char *out_env;
char *err_env;
char *env;
pthread_mutex_init (&lock, NULL);
out_env = secure_getenv (MPX_RT_OUT);
env_var_list_add (MPX_RT_OUT, out_env);
err_env = secure_getenv (MPX_RT_ERR);
env_var_list_add (MPX_RT_ERR, err_env);
env = secure_getenv (MPX_RT_ADDPID);
env_var_list_add (MPX_RT_ADDPID, env);
add_pid = check_yes (env);
set_file_stream (&out, out_name, out_env, stdout);
if (out_env == 0 || err_env == 0 || (strcmp (out_env, err_env) != 0))
set_file_stream (&err, err_name, err_env, stderr);
else
/* in case we get the same file name for err and out */
err = out;
env = secure_getenv (MPX_RT_VERBOSE);
env_var_list_add (MPX_RT_VERBOSE, env);
verbose_val = init_verbose_val (env);
env = secure_getenv (MPX_RT_MODE);
env_var_list_add (MPX_RT_MODE, env);
mode = set_mpx_rt_mode (env);
env = secure_getenv (MPX_RT_BNDPRESERVE);
env_var_list_add (MPX_RT_BNDPRESERVE, env);
validate_bndpreserve (env, bndpreserve);
env = secure_getenv (MPX_RT_PRINT_SUMMARY);
env_var_list_add (MPX_RT_PRINT_SUMMARY, env);
summary = check_yes (env);
env = secure_getenv (MPX_RT_HELP);
if (check_yes (env))
print_help ();
/*
* at fork - create new files for output and err according
* to the env vars.
*/
pthread_atfork (NULL, at_fork_check, open_child_files);
env_var_print_summary ();
}
void
__mpxrt_utils_free (void)
{
if (files_overwritten)
__mpxrt_print (VERB_INFO, "\nMPX RUNTIME WARNING: out/err files are"
" overwritten in new processes since %s was not set.\n",
MPX_RT_ADDPID);
if (out != stdout)
{
fclose (out);
if (out_file_dirty != 1)
remove (out_name);
}
if (err != stderr)
{
fclose (err);
if (err_file_dirty != 1)
remove (err_name);
}
pthread_mutex_destroy (&lock);
}
void
__mpxrt_write_uint (verbose_type vt, uint64_t val, unsigned base)
{
static const char digits[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
char str[65];
int pos = 64;;
str[pos--] = 0;
if (vt > verbose_val || base <= 1 || base > sizeof (digits))
return;
if (val < base)
str[pos--] = digits[val];
else
while (val)
{
str[pos--] = digits[val % base];
val = val / base;
}
__mpxrt_write (vt, str + pos + 1);
}
void
__mpxrt_write (verbose_type vt, const char* str)
{
va_list argp;
FILE *print_to;
if (vt > verbose_val)
return;
if (vt == VERB_ERROR)
{
print_to = err;
err_file_dirty = 1;
}
else
{
print_to = out;
out_file_dirty = 1;
}
pthread_mutex_lock (&lock);
write (fileno (print_to), str, strlen (str));
pthread_mutex_unlock (&lock);
va_end (argp);
}
void
__mpxrt_print (verbose_type vt, const char* frmt, ...)
{
va_list argp;
FILE *print_to;
if (vt > verbose_val)
return;
va_start (argp, frmt);
if (vt == VERB_ERROR)
{
print_to = err;
err_file_dirty = 1;
}
else
{
print_to = out;
out_file_dirty = 1;
}
pthread_mutex_lock (&lock);
vfprintf (print_to, frmt, argp);
fflush (print_to);
pthread_mutex_unlock (&lock);
va_end (argp);
}
mpx_rt_mode_t
__mpxrt_mode (void)
{
return mode;
}
void
__mpxrt_print_summary (uint64_t num_brs, uint64_t l1_size)
{
if (summary == 0)
return;
out_file_dirty = 1;
pthread_mutex_lock (&lock);
fprintf (out, "MPX runtime summary:\n");
fprintf (out, " Number of bounds violations: %" PRIu64 ".\n", num_brs);
fprintf (out, " Size of allocated L1: %" PRIu64 "B\n", l1_size);
fflush (out);
pthread_mutex_unlock (&lock);
}

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/* mpxrt-utils.h -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2014, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
#ifndef MPXRT_UTILS_H
#define MPXRT_UTILS_H
#include <stdint.h>
typedef enum {
VERB_ERROR,
VERB_INFO,
VERB_BR,
VERB_DEBUG
} verbose_type;
typedef enum {
MPX_RT_COUNT,
MPX_RT_STOP
} mpx_rt_mode_t;
void __mpxrt_init_env_vars (int* bndpreserve);
void __mpxrt_write_uint (verbose_type vt, uint64_t val, unsigned base);
void __mpxrt_write (verbose_type vt, const char* str);
void __mpxrt_print (verbose_type vt, const char* frmt, ...);
mpx_rt_mode_t __mpxrt_mode (void);
void __mpxrt_utils_free (void);
void __mpxrt_print_summary (uint64_t num_brs, uint64_t l1_size);
#endif /* MPXRT_UTILS_H */

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/* mpxrt.c -*-C++-*-
*
*************************************************************************
*
* @copyright
* Copyright (C) 2014, Intel Corporation
* All rights reserved.
*
* @copyright
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* @copyright
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
#define __STDC_FORMAT_MACROS
#include "config.h"
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include <signal.h>
#include <assert.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#include <cpuid.h>
#include "mpxrt-utils.h"
#ifdef __i386__
/* i386 directory size is 4MB */
#define NUM_L1_BITS 20
#define REG_IP_IDX REG_EIP
#define REX_PREFIX
#define XSAVE_OFFSET_IN_FPMEM sizeof (struct _libc_fpstate)
#else /* __i386__ */
/* x86_64 directory size is 2GB */
#define NUM_L1_BITS 28
#define REG_IP_IDX REG_RIP
#define REX_PREFIX "0x48, "
#define XSAVE_OFFSET_IN_FPMEM 0
#endif /* !__i386__ */
#define MPX_ENABLE_BIT_NO 0
#define BNDPRESERVE_BIT_NO 1
const size_t MPX_L1_SIZE = (1UL << NUM_L1_BITS) * sizeof (void *);
struct xsave_hdr_struct
{
uint64_t xstate_bv;
uint64_t reserved1[2];
uint64_t reserved2[5];
} __attribute__ ((packed));
struct bndregs_struct
{
uint64_t bndregs[8];
} __attribute__ ((packed));
struct bndcsr_struct {
uint64_t cfg_reg_u;
uint64_t status_reg;
} __attribute__((packed));
struct xsave_struct
{
uint8_t fpu_sse[512];
struct xsave_hdr_struct xsave_hdr;
uint8_t ymm[256];
uint8_t lwp[128];
struct bndregs_struct bndregs;
struct bndcsr_struct bndcsr;
} __attribute__ ((packed));
/* Following vars are initialized at process startup only
and thus are considered to be thread safe. */
static void *l1base = NULL;
static int bndpreserve;
static int enable = 1;
/* Var holding number of occured BRs. It is modified from
signal handler only and thus it should be thread safe. */
static uint64_t num_bnd_chk = 0;
static inline void
xrstor_state (struct xsave_struct *fx, uint64_t mask)
{
uint32_t lmask = mask;
uint32_t hmask = mask >> 32;
asm volatile (".byte " REX_PREFIX "0x0f,0xae,0x2f\n\t"
: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
: "memory");
}
static inline void
xsave_state (struct xsave_struct *fx, uint64_t mask)
{
uint32_t lmask = mask;
uint32_t hmask = mask >> 32;
asm volatile (".byte " REX_PREFIX "0x0f,0xae,0x27\n\t"
: : "D" (fx), "m" (*fx), "a" (lmask), "d" (hmask)
: "memory");
}
static inline uint64_t
xgetbv (uint32_t index)
{
uint32_t eax, edx;
asm volatile (".byte 0x0f,0x01,0xd0" /* xgetbv */
: "=a" (eax), "=d" (edx)
: "c" (index));
return eax + ((uint64_t)edx << 32);
}
static uint64_t
read_mpx_status_sig (ucontext_t *uctxt)
{
uint8_t __attribute__ ((__aligned__ (64))) buffer[4096];
struct xsave_struct *xsave_buf = (struct xsave_struct *)buffer;
memset (buffer, 0, sizeof (buffer));
memcpy (buffer,
(uint8_t *)uctxt->uc_mcontext.fpregs + XSAVE_OFFSET_IN_FPMEM,
sizeof (struct xsave_struct));
return xsave_buf->bndcsr.status_reg;
}
static uint8_t *
get_next_inst_ip (uint8_t *addr)
{
uint8_t *ip = addr;
uint8_t sib;
/* Determine the prefix. */
switch (*ip)
{
case 0xf2:
case 0xf3:
case 0x66:
ip++;
break;
}
/* Look for rex prefix. */
if ((*ip & 0x40) == 0x40)
ip++;
/* Make sure we have a MPX instruction. */
if (*ip++ != 0x0f)
return addr;
/* Skip the op code byte. */
ip++;
/* Get the moderm byte. */
uint8_t modrm = *ip++;
/* Break it down into parts. */
uint8_t rm = modrm & 7;
uint8_t mod = (modrm >> 6);
/* Init the parts of the address mode. */
uint8_t base = 8;
/* Is it a mem mode? */
if (mod != 3)
{
/* Look for scaled indexed addressing. */
if (rm == 4)
{
/* SIB addressing. */
sib = *ip++;
base = sib & 7;
switch (mod)
{
case 0:
if (base == 5)
ip += 4;
break;
case 1:
ip++;
break;
case 2:
ip += 4;
break;
}
}
else
{
/* MODRM addressing. */
switch (mod)
{
case 0:
if (rm == 5)
/* DISP32 addressing, no base. */
ip += 4;
break;
case 1:
ip++;
break;
case 2:
ip += 4;
break;
}
}
}
return ip;
}
static void
handler (int sig __attribute__ ((unused)),
siginfo_t *info __attribute__ ((unused)),
void *vucontext,
struct xsave_struct *buf __attribute__ ((unused)))
{
ucontext_t* uctxt;
greg_t trapno;
greg_t ip;
uctxt = vucontext;
trapno = uctxt->uc_mcontext.gregs[REG_TRAPNO];
ip = uctxt->uc_mcontext.gregs[REG_IP_IDX];
if (trapno == 5)
{
uint64_t status = read_mpx_status_sig (uctxt);
uint64_t br_reason = status & 0x3;
__mpxrt_write (VERB_BR, "Saw a #BR! status ");
__mpxrt_write_uint (VERB_BR, status, 10);
__mpxrt_write (VERB_BR, " at 0x");
__mpxrt_write_uint (VERB_BR, ip, 16);
__mpxrt_write (VERB_BR, "\n");
switch (br_reason)
{
case 1: /* traditional BR */
num_bnd_chk++;
uctxt->uc_mcontext.gregs[REG_IP_IDX] =
(greg_t)get_next_inst_ip ((uint8_t *)ip);
if (__mpxrt_mode () == MPX_RT_STOP)
exit (255);
return;
default:
__mpxrt_write (VERB_BR, "Unexpected status with bound exception: ");
__mpxrt_write_uint (VERB_BR, status, 10);
__mpxrt_write (VERB_BR, "\n");
break;
}
}
else if (trapno == 14)
{
__mpxrt_write (VERB_ERROR, "In signal handler, trapno = ");
__mpxrt_write_uint (VERB_ERROR, trapno, 10);
__mpxrt_write (VERB_ERROR, ", ip = 0x");
__mpxrt_write_uint (VERB_ERROR, ip, 16);
__mpxrt_write (VERB_BR, "\n");
exit (255);
}
else
{
__mpxrt_write (VERB_ERROR, "Unexpected trap ");
__mpxrt_write_uint (VERB_ERROR, trapno, 10);
__mpxrt_write (VERB_ERROR, "! at 0x");
__mpxrt_write_uint (VERB_ERROR, ip, 16);
__mpxrt_write (VERB_BR, "\n");
exit (255);
}
}
/* Using wrapper to the real handler in order to save the bnd regs
using xsave before any unprefixed call. an unprefixed call to
__i686.get_pc_thunk.bx is added by the linker in 32bit at the
beginning of handler function since there are references to
global variables. */
static void
handler_wrap (int signum, siginfo_t* si, void* vucontext)
{
/* Since the OS currently not handling chkptr regs.
We need to store them for later use. They might be
init due to unprefixed call,Jcc,ret. avoiding calling
function since the function will be unprefixed as well. */
uint8_t __attribute__ ((__aligned__ (64))) buffer[4096];
struct xsave_struct *xsave_buf = (struct xsave_struct *)buffer;
uint64_t mask = 0x18;
uint32_t lmask = mask;
uint32_t hmask = mask >> 32;
asm volatile (".byte " REX_PREFIX "0x0f,0xae,0x27\n\t"
: : "D" (xsave_buf), "m" (*xsave_buf),
"a" (lmask), "d" (hmask)
: "memory");
handler (signum, si, vucontext, xsave_buf);
}
static bool
check_mpx_support (void)
{
unsigned int eax, ebx, ecx, edx;
unsigned int max_level = __get_cpuid_max (0, NULL);
if (max_level < 13)
{
__mpxrt_print (VERB_DEBUG, "No required CPUID level support.\n");
return false;
}
__cpuid_count (0, 0, eax, ebx, ecx, edx);
if (!(ecx & bit_XSAVE))
{
__mpxrt_print (VERB_DEBUG, "No XSAVE support.\n");
return false;
}
if (!(ecx & bit_OSXSAVE))
{
__mpxrt_print (VERB_DEBUG, "No OSXSAVE support.\n");
return false;
}
__cpuid_count (7, 0, eax, ebx, ecx, edx);
if (!(ebx & bit_MPX))
{
__mpxrt_print (VERB_DEBUG, "No MPX support.\n");
return false;
}
__cpuid_count (13, 0, eax, ebx, ecx, edx);
if (!(eax & bit_BNDREGS))
{
__mpxrt_print (VERB_DEBUG, "No BNDREGS support.\n");
return false;
}
if (!(eax & bit_BNDCSR))
{
__mpxrt_print (VERB_DEBUG, "No BNDCSR support.\n");
return false;
}
return true;
}
static void
enable_mpx (void)
{
uint8_t __attribute__ ((__aligned__ (64))) buffer[4096];
struct xsave_struct *xsave_buf = (struct xsave_struct *)buffer;
memset (buffer, 0, sizeof (buffer));
xrstor_state (xsave_buf, 0x18);
__mpxrt_print (VERB_DEBUG, "Initalizing MPX...\n");
__mpxrt_print (VERB_DEBUG, " Enable bit: %d\n", enable);
__mpxrt_print (VERB_DEBUG, " BNDPRESERVE bit: %d\n", bndpreserve);
/* Enable MPX. */
xsave_buf->xsave_hdr.xstate_bv = 0x10;
xsave_buf->bndcsr.cfg_reg_u = (unsigned long)l1base;
xsave_buf->bndcsr.cfg_reg_u |= enable << MPX_ENABLE_BIT_NO;
xsave_buf->bndcsr.cfg_reg_u |= bndpreserve << BNDPRESERVE_BIT_NO;
xsave_buf->bndcsr.status_reg = 0;
xrstor_state (xsave_buf, 0x10);
}
static void
disable_mpx (void)
{
uint8_t __attribute__ ((__aligned__ (64))) buffer[4096];
struct xsave_struct *xsave_buf = (struct xsave_struct *)buffer;
memset(buffer, 0, sizeof(buffer));
xrstor_state(xsave_buf, 0x18);
/* Disable MPX. */
xsave_buf->xsave_hdr.xstate_bv = 0x10;
xsave_buf->bndcsr.cfg_reg_u = 0;
xsave_buf->bndcsr.status_reg = 0;
xrstor_state(xsave_buf, 0x10);
}
static bool
process_specific_init (void)
{
if (!check_mpx_support ())
return false;
l1base = mmap (NULL, MPX_L1_SIZE, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (l1base == MAP_FAILED)
{
perror ("mmap");
exit (EXIT_FAILURE);
}
enable_mpx ();
if (prctl (43, 0, 0, 0, 0))
{
__mpxrt_print (VERB_ERROR, "No MPX support\n");
disable_mpx ();
return false;
}
return true;
}
static bool
process_specific_finish (void)
{
if (!check_mpx_support ())
return false;
if (prctl (44, 0, 0, 0, 0))
{
__mpxrt_print (VERB_ERROR, "No MPX support\n");
return false;
}
munmap (l1base, MPX_L1_SIZE);
return true;
}
static void
setup_handler (void)
{
int r,rs;
struct sigaction newact;
/* #BR is mapped to sigsegv */
int signum = SIGSEGV;
newact.sa_handler = 0;
newact.sa_sigaction = handler_wrap;
/* sigset_t - signals to block while in the handler
get the old signal mask. */
rs = sigprocmask (SIG_SETMASK, 0, &newact.sa_mask);
assert (rs == 0);
/* Call sa_sigaction, not sa_handler. */
newact.sa_flags = SA_SIGINFO;
/* In case we call user's handler on SIGSEGV (not bound
violation exception) we want to allow bound checking
inside the user handler -> nested exception. */
newact.sa_flags |= SA_NODEFER;
newact.sa_restorer = 0;
r = sigaction (signum, &newact, 0);
assert (r == 0);
}
/* Set constructor priority to two to make it run after the
constructor in sigaction.c. */
static void __attribute__ ((constructor (1005)))
mpxrt_prepare (void)
{
__mpxrt_init_env_vars (&bndpreserve);
setup_handler ();
process_specific_init ();
}
static void __attribute__ ((destructor))
mpxrt_cleanup (void)
{
__mpxrt_print_summary (num_bnd_chk, MPX_L1_SIZE);
__mpxrt_utils_free ();
process_specific_finish ();
}