[PATCH, MPX runtime 1/2] Integrate MPX runtime library
Ilya Enkovich
enkovich.gnu@gmail.com
Fri Nov 21 16:04:00 GMT 2014
On 19 Nov 21:11, Ilya Enkovich wrote:
> 2014-11-19 20:55 GMT+03:00 Jeff Law <law@redhat.com>:
> > On 11/19/14 07:15, Ilya Enkovich wrote:
> >
> >> --
> >> 2014-11-19 Ilya Enkovich <ilya.enkovich@intel.com>
> >>
> >> * Makefile.def: Add libmpx.
> >> * configure.ac: Add libmpx.
> >> * Makefile.in: Regenerate.
> >> * configure: Regenerate.
> >>
> >> gcc/
> >>
> >> 2014-11-19 Ilya Enkovich <ilya.enkovich@intel.com>
> >>
> >> * gcc.c (LIBMPX_LIBS): New.
> >> (LIBMPX_SPEC): New.
> >> (MPX_SPEC): New.
> >> (LINK_COMMAND_SPEC): Add MPX_SPEC.
> >> * c-family/c.opt (static-libmpx): New.
> >>
> >> libmpx/
> >>
> >> 2014-11-19 Ilya Enkovich <ilya.enkovich@intel.com>
> >>
> >> Initial commit.
> >
> > So I have only done a cursory peek at this code, but one thing which I did
> > immediately note was the CPU feature testing stuff. Shouldn't all that
> > stuff be integrated into the feature testing bits already found in libgcc?
>
> I'll have a look at these features.
>
> >
> > I've asked the steering committee to vote on accepting the runtime --
> > necessary given Intel is keeping copyright ownership to the best of my
> > knowledge.
>
> Thanks!
>
> Ilya
>
> >
> > Jeff
> >
Jakub objected adding CPUID checks used in MPX runtime into __builtin_cpu_supports. So I just added required bits into cpuid.h and removed local implementation of cpuid. Is it OK?
Thanks,
Ilya
--
2014-11-21 Ilya Enkovich <ilya.enkovich@intel.com>
* Makefile.def: Add libmpx.
* configure.ac: Add libmpx.
* Makefile.in: Regenerate.
* configure: Regenerate.
gcc/
2014-11-21 Ilya Enkovich <ilya.enkovich@intel.com>
* config/i386/cpuid.h (bit_MPX): New.
(bit_BNDREGS): New.
(bit_BNDCSR): New.
* gcc.c (LIBMPX_LIBS): New.
(LIBMPX_SPEC): New.
(MPX_SPEC): New.
(LINK_COMMAND_SPEC): Add MPX_SPEC.
* c-family/c.opt (static-libmpx): New.
libmpx/
2014-11-21 Ilya Enkovich <ilya.enkovich@intel.com>
Initial commit.
diff --git a/Makefile.def b/Makefile.def
index 40bbca9..4a535d2 100644
--- a/Makefile.def
+++ b/Makefile.def
@@ -128,6 +128,9 @@ 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;
diff --git a/configure.ac b/configure.ac
index b27fb1d..ccb119b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -162,6 +162,7 @@ target_libraries="target-libgcc \
target-libstdc++-v3 \
target-libsanitizer \
target-libvtv \
+ target-libmpx \
target-libssp \
target-libquadmath \
target-libgfortran \
@@ -642,6 +643,25 @@ if test -d ${srcdir}/libvtv; then
fi
fi
+
+# Disable libmpx on unsupported systems.
+if test -d ${srcdir}/libmpx; then
+ if test x$enable_libmpx = x; then
+ AC_MSG_CHECKING([for libmpx support])
+ if (srcdir=${srcdir}/libmpx; \
+ . ${srcdir}/configure.tgt; \
+ test "$LIBMPX_SUPPORTED" != "yes")
+ then
+ AC_MSG_RESULT([no])
+ noconfigdirs="$noconfigdirs target-libmpx"
+ else
+ AC_MSG_RESULT([yes])
+ fi
+ fi
+fi
+
+
+
# Disable libquadmath for some systems.
case "${target}" in
avr-*-*)
@@ -2652,6 +2672,11 @@ 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!
diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
index 85dcb98..8f5d76c 100644
--- a/gcc/c-family/c.opt
+++ b/gcc/c-family/c.opt
@@ -1040,6 +1040,9 @@ 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
diff --git a/gcc/config/i386/cpuid.h b/gcc/config/i386/cpuid.h
index 133e356..f85cebb 100644
--- a/gcc/config/i386/cpuid.h
+++ b/gcc/config/i386/cpuid.h
@@ -72,6 +72,7 @@
#define bit_AVX2 (1 << 5)
#define bit_BMI2 (1 << 8)
#define bit_RTM (1 << 11)
+#define bit_MPX (1 << 14)
#define bit_AVX512F (1 << 16)
#define bit_AVX512DQ (1 << 17)
#define bit_RDSEED (1 << 18)
@@ -87,6 +88,10 @@
/* %ecx */
#define bit_PREFETCHWT1 (1 << 0)
+/* XFEATURE_ENABLED_MASK register bits (%eax == 13, %ecx == 0) */
+#define bit_BNDREGS (1 << 3)
+#define bit_BNDCSR (1 << 4)
+
/* Extended State Enumeration Sub-leaf (%eax == 13, %ecx == 1) */
#define bit_XSAVEOPT (1 << 0)
#define bit_XSAVEC (1 << 1)
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 653ca8d..75e5767 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -809,6 +809,30 @@ proper position among the other output files. */
%{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start -u_vtable_map_vars_end}}"
#endif
+#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 MPX_SPEC
+#define MPX_SPEC "\
+%{!nostdlib:%{!nodefaultlibs:" LIBMPX_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. */
@@ -829,6 +853,7 @@ 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\
+ " MPX_SPEC " \
%{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
%{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
%{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
diff --git a/libmpx/ChangeLog b/libmpx/ChangeLog
new file mode 100644
index 0000000..2e2ea92
--- /dev/null
+++ b/libmpx/ChangeLog
@@ -0,0 +1,3 @@
+2014-11-10 Ilya Enkovich <ilya.enkovich@intel.com>
+
+ Initial checkin.
diff --git a/libmpx/Makefile.am b/libmpx/Makefile.am
new file mode 100644
index 0000000..6cee4ac
--- /dev/null
+++ b/libmpx/Makefile.am
@@ -0,0 +1,47 @@
+ACLOCAL_AMFLAGS = -I .. -I ../config
+
+if LIBMPX_SUPPORTED
+SUBDIRS = mpxrt
+nodist_toolexeclib_HEADERS = libmpx.spec
+endif
+
+## May be used by toolexeclibdir.
+gcc_version := $(shell cat $(top_srcdir)/../gcc/BASE-VER)
+
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+ "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
+ "INSTALL=$(INSTALL)" \
+ "INSTALL_DATA=$(INSTALL_DATA)" \
+ "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
+ "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
+ "JC1FLAGS=$(JC1FLAGS)" \
+ "LDFLAGS=$(LDFLAGS)" \
+ "LIBCFLAGS=$(LIBCFLAGS)" \
+ "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
+ "MAKE=$(MAKE)" \
+ "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
+ "PICFLAG=$(PICFLAG)" \
+ "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
+ "SHELL=$(SHELL)" \
+ "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+ "exec_prefix=$(exec_prefix)" \
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diff --git a/libmpx/acinclude.m4 b/libmpx/acinclude.m4
new file mode 100644
index 0000000..38e0808
--- /dev/null
+++ b/libmpx/acinclude.m4
@@ -0,0 +1,12 @@
+dnl ----------------------------------------------------------------------
+dnl This whole bit snagged from libgfortran.
+
+sinclude(../libtool.m4)
+dnl The lines below arrange for aclocal not to bring an installed
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+AC_DEFUN([AC_LIBTOOL_DLOPEN])
+AC_DEFUN([AC_PROG_LD])
+])
diff --git a/libmpx/aclocal.m4 b/libmpx/aclocal.m4
new file mode 100644
index 0000000..029586b
--- /dev/null
+++ b/libmpx/aclocal.m4
@@ -0,0 +1,701 @@
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+
+# Add --enable-maintainer-mode option to configure. -*- Autoconf -*-
+# From Jim Meyering
+
+# Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
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+# serial 5
+
+# AM_MAINTAINER_MODE([DEFAULT-MODE])
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+# Control maintainer-specific portions of Makefiles.
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+AC_DEFUN([AM_MAINTAINER_MODE],
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+ m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
+AC_MSG_CHECKING([whether to am_maintainer_other maintainer-specific portions of Makefiles])
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+ AC_ARG_ENABLE([maintainer-mode],
+[ --][am_maintainer_other][-maintainer-mode am_maintainer_other make rules and dependencies not useful
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+AU_DEFUN([jm_MAINTAINER_MODE], [AM_MAINTAINER_MODE])
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+# Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 6
+
+# AM_PROG_CC_C_O
+# --------------
+# Like AC_PROG_CC_C_O, but changed for automake.
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+AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
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+eval am_t=\$ac_cv_prog_cc_${am_cc}_c_o
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+ # Losing compiler, so override with the script.
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+ # A longer-term fix would be to have automake use am__CC in this case,
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+ CC="$am_aux_dir/compile $CC"
+fi
+dnl Make sure AC_PROG_CC is never called again, or it will override our
+dnl setting of CC.
+m4_define([AC_PROG_CC],
+ [m4_fatal([AC_PROG_CC cannot be called after AM_PROG_CC_C_O])])
+])
+
+# Fake the existence of programs that GNU maintainers use. -*- Autoconf -*-
+
+# Copyright (C) 1997, 1999, 2000, 2001, 2003, 2004, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 6
+
+# AM_MISSING_PROG(NAME, PROGRAM)
+# ------------------------------
+AC_DEFUN([AM_MISSING_PROG],
+[AC_REQUIRE([AM_MISSING_HAS_RUN])
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+AC_SUBST($1)])
+
+
+# AM_MISSING_HAS_RUN
+# ------------------
+# Define MISSING if not defined so far and test if it supports --run.
+# If it does, set am_missing_run to use it, otherwise, to nothing.
+AC_DEFUN([AM_MISSING_HAS_RUN],
+[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
+AC_REQUIRE_AUX_FILE([missing])dnl
+if test x"${MISSING+set}" != xset; then
+ case $am_aux_dir in
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+ MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
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+# Use eval to expand $SHELL
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+ am_missing_run="$MISSING --run "
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+ am_missing_run=
+ AC_MSG_WARN([`missing' script is too old or missing])
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+])
+
+# Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_MKDIR_P
+# ---------------
+# Check for `mkdir -p'.
+AC_DEFUN([AM_PROG_MKDIR_P],
+[AC_PREREQ([2.60])dnl
+AC_REQUIRE([AC_PROG_MKDIR_P])dnl
+dnl Automake 1.8 to 1.9.6 used to define mkdir_p. We now use MKDIR_P,
+dnl while keeping a definition of mkdir_p for backward compatibility.
+dnl @MKDIR_P@ is magic: AC_OUTPUT adjusts its value for each Makefile.
+dnl However we cannot define mkdir_p as $(MKDIR_P) for the sake of
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+dnl adjustment using top_builddir (which is defined more often than
+dnl MKDIR_P).
+AC_SUBST([mkdir_p], ["$MKDIR_P"])dnl
+case $mkdir_p in
+ [[\\/$]]* | ?:[[\\/]]*) ;;
+ */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;;
+esac
+])
+
+# Helper functions for option handling. -*- Autoconf -*-
+
+# Copyright (C) 2001, 2002, 2003, 2005, 2008 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 4
+
+# _AM_MANGLE_OPTION(NAME)
+# -----------------------
+AC_DEFUN([_AM_MANGLE_OPTION],
+[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
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+# _AM_SET_OPTION(NAME)
+# ------------------------------
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+AC_DEFUN([_AM_SET_OPTION],
+[m4_define(_AM_MANGLE_OPTION([$1]), 1)])
+
+# _AM_SET_OPTIONS(OPTIONS)
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+AC_DEFUN([_AM_SET_OPTIONS],
+[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
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+# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
+# -------------------------------------------
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+AC_DEFUN([_AM_IF_OPTION],
+[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
+
+# Check to make sure that the build environment is sane. -*- Autoconf -*-
+
+# Copyright (C) 1996, 1997, 2000, 2001, 2003, 2005, 2008
+# Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 5
+
+# AM_SANITY_CHECK
+# ---------------
+AC_DEFUN([AM_SANITY_CHECK],
+[AC_MSG_CHECKING([whether build environment is sane])
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+# name. Accept space and tab only in the latter.
+am_lf='
+'
+case `pwd` in
+ *[[\\\"\#\$\&\'\`$am_lf]]*)
+ AC_MSG_ERROR([unsafe absolute working directory name]);;
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+ AC_MSG_ERROR([unsafe srcdir value: `$srcdir']);;
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+
+# Do `set' in a subshell so we don't clobber the current shell's
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+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+ set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+ if test "$[*]" = "X"; then
+ # -L didn't work.
+ set X `ls -t "$srcdir/configure" conftest.file`
+ fi
+ rm -f conftest.file
+ if test "$[*]" != "X $srcdir/configure conftest.file" \
+ && test "$[*]" != "X conftest.file $srcdir/configure"; then
+
+ # If neither matched, then we have a broken ls. This can happen
+ # if, for instance, CONFIG_SHELL is bash and it inherits a
+ # broken ls alias from the environment. This has actually
+ # happened. Such a system could not be considered "sane".
+ AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
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+ fi
+
+ test "$[2]" = conftest.file
+ )
+then
+ # Ok.
+ :
+else
+ AC_MSG_ERROR([newly created file is older than distributed files!
+Check your system clock])
+fi
+AC_MSG_RESULT(yes)])
+
+# Copyright (C) 2001, 2003, 2005 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# AM_PROG_INSTALL_STRIP
+# ---------------------
+# One issue with vendor `install' (even GNU) is that you can't
+# specify the program used to strip binaries. This is especially
+# annoying in cross-compiling environments, where the build's strip
+# is unlikely to handle the host's binaries.
+# Fortunately install-sh will honor a STRIPPROG variable, so we
+# always use install-sh in `make install-strip', and initialize
+# STRIPPROG with the value of the STRIP variable (set by the user).
+AC_DEFUN([AM_PROG_INSTALL_STRIP],
+[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
+# Installed binaries are usually stripped using `strip' when the user
+# run `make install-strip'. However `strip' might not be the right
+# tool to use in cross-compilation environments, therefore Automake
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+dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
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+ AC_CHECK_TOOL([STRIP], [strip], :)
+fi
+INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
+AC_SUBST([INSTALL_STRIP_PROGRAM])])
+
+# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 2
+
+# _AM_SUBST_NOTMAKE(VARIABLE)
+# ---------------------------
+# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
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+# AM_SUBST_NOTMAKE(VARIABLE)
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+# Check how to create a tarball. -*- Autoconf -*-
+
+# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# serial 2
+
+# _AM_PROG_TAR(FORMAT)
+# --------------------
+# Check how to create a tarball in format FORMAT.
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+#
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+# writing to stdout a FORMAT-tarball containing the directory
+# $tardir.
+# tardir=directory && $(am__tar) > result.tar
+#
+# Substitute a variable $(am__untar) that extract such
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+# $(am__untar) < result.tar
+AC_DEFUN([_AM_PROG_TAR],
+[# Always define AMTAR for backward compatibility.
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+ [m4_case([$1], [ustar],, [pax],,
+ [m4_fatal([Unknown tar format])])
+AC_MSG_CHECKING([how to create a $1 tar archive])
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+_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
+_am_tools=${am_cv_prog_tar_$1-$_am_tools}
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+ case $_am_tool in
+ gnutar)
+ for _am_tar in tar gnutar gtar;
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+ am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
+ am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
+ am__untar="$_am_tar -xf -"
+ ;;
+ plaintar)
+ # Must skip GNU tar: if it does not support --format= it doesn't create
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+ am__tar='tar chf - "$$tardir"'
+ am__tar_='tar chf - "$tardir"'
+ am__untar='tar xf -'
+ ;;
+ pax)
+ am__tar='pax -L -x $1 -w "$$tardir"'
+ am__tar_='pax -L -x $1 -w "$tardir"'
+ am__untar='pax -r'
+ ;;
+ cpio)
+ am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
+ am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
+ am__untar='cpio -i -H $1 -d'
+ ;;
+ none)
+ am__tar=false
+ am__tar_=false
+ am__untar=false
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+AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
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+AC_SUBST([am__untar])
+]) # _AM_PROG_TAR
+
+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])
diff --git a/libmpx/config.h.in b/libmpx/config.h.in
new file mode 100644
index 0000000..a318e02
--- /dev/null
+++ b/libmpx/config.h.in
@@ -0,0 +1,100 @@
+/* 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
diff --git a/libmpx/configure.ac b/libmpx/configure.ac
new file mode 100644
index 0000000..bd7a5eb
--- /dev/null
+++ b/libmpx/configure.ac
@@ -0,0 +1,126 @@
+# -*- 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])
+. ${srcdir}/configure.tgt
+AC_MSG_RESULT($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$$ << \_EOF
+s!`test -f '$<' || echo '$(srcdir)/'`!!
+_EOF
+ sed -f vpsed$$ $ac_file > tmp$$
+ mv tmp$$ $ac_file
+ rm vpsed$$
+ echo 'MULTISUBDIR =' >> $ac_file
+ ml_norecursion=yes
+ . ${multi_basedir}/config-ml.in
+ AS_UNSET([ml_norecursion])
+])
+
+AC_OUTPUT
diff --git a/libmpx/configure.tgt b/libmpx/configure.tgt
new file mode 100644
index 0000000..103d8bd
--- /dev/null
+++ b/libmpx/configure.tgt
@@ -0,0 +1,35 @@
+# -*- shell-script -*-
+# Copyright (C) 2014 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not see <http://www.gnu.org/licenses/>.
+
+# This is the target specific configuration file. This is invoked by the
+# autoconf generated configure script. Putting it in a separate shell file
+# lets us skip running autoconf when modifying target specific information.
+
+# Filter out unsupported systems.
+LIBMPX_SUPPORTED=no
+case "${target}" in
+ x86_64-*-linux* | i?86-*-linux*)
+ # X32 doesn't support MPX.
+ echo "int i[sizeof (void *) == 4 ? 1 : -1] = { __x86_64__ };" > conftestx.c
+ if ${CC} ${CFLAGS} -c -o conftestx.o conftestx.c > /dev/null 2>&1; then
+ LIBMPX_SUPPORTED=no
+ else
+ LIBMPX_SUPPORTED=yes
+ fi
+ ;;
+ *)
+ ;;
+esac
diff --git a/libmpx/libmpx.spec.in b/libmpx/libmpx.spec.in
new file mode 100644
index 0000000..a265e28
--- /dev/null
+++ b/libmpx/libmpx.spec.in
@@ -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@
diff --git a/libmpx/libtool-version b/libmpx/libtool-version
new file mode 100644
index 0000000..d1f57a0
--- /dev/null
+++ b/libmpx/libtool-version
@@ -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
diff --git a/libmpx/mpxrt/Makefile.am b/libmpx/mpxrt/Makefile.am
new file mode 100644
index 0000000..5f5c21e
--- /dev/null
+++ b/libmpx/mpxrt/Makefile.am
@@ -0,0 +1,59 @@
+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 = $(XCFLAGS)
+
+toolexeclib_LTLIBRARIES = libmpx.la
+
+libmpx_la_SOURCES = mpxrt.c mpxrt-utils.c
+
+libmpx_la_DEPENDENCIES = libmpx.map
+libmpx_la_LDFLAGS = -Wl,--version-script=$(srcdir)/libmpx.map $(link_libmpx)
+
+mpxrt.lo: mpxrt-utils.h
+mpxrt-utils.lo: mpxrt-utils.h
+endif
+
+# Work around what appears to be a GNU make bug handling MAKEFLAGS
+# values defined in terms of make variables, as is the case for CC and
+# friends when we are called from the top level Makefile.
+AM_MAKEFLAGS = \
+ "AR_FLAGS=$(AR_FLAGS)" \
+ "CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+ "CFLAGS=$(CFLAGS)" \
+ "CXXFLAGS=$(CXXFLAGS)" \
+ "CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
+ "CFLAGS_FOR_TARGET=$(CFLAGS_FOR_TARGET)" \
+ "INSTALL=$(INSTALL)" \
+ "INSTALL_DATA=$(INSTALL_DATA)" \
+ "INSTALL_PROGRAM=$(INSTALL_PROGRAM)" \
+ "INSTALL_SCRIPT=$(INSTALL_SCRIPT)" \
+ "JC1FLAGS=$(JC1FLAGS)" \
+ "LDFLAGS=$(LDFLAGS)" \
+ "LIBCFLAGS=$(LIBCFLAGS)" \
+ "LIBCFLAGS_FOR_TARGET=$(LIBCFLAGS_FOR_TARGET)" \
+ "MAKE=$(MAKE)" \
+ "MAKEINFO=$(MAKEINFO) $(MAKEINFOFLAGS)" \
+ "PICFLAG=$(PICFLAG)" \
+ "PICFLAG_FOR_TARGET=$(PICFLAG_FOR_TARGET)" \
+ "SHELL=$(SHELL)" \
+ "RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+ "exec_prefix=$(exec_prefix)" \
+ "infodir=$(infodir)" \
+ "libdir=$(libdir)" \
+ "prefix=$(prefix)" \
+ "includedir=$(includedir)" \
+ "AR=$(AR)" \
+ "AS=$(AS)" \
+ "LD=$(LD)" \
+ "LIBCFLAGS=$(LIBCFLAGS)" \
+ "NM=$(NM)" \
+ "PICFLAG=$(PICFLAG)" \
+ "RANLIB=$(RANLIB)" \
+ "DESTDIR=$(DESTDIR)"
+
+MAKEOVERRIDES=
diff --git a/libmpx/mpxrt/libmpx.map b/libmpx/mpxrt/libmpx.map
new file mode 100644
index 0000000..90093b7
--- /dev/null
+++ b/libmpx/mpxrt/libmpx.map
@@ -0,0 +1,5 @@
+LIBMPX_1.0
+{
+ local:
+ *;
+};
diff --git a/libmpx/mpxrt/libtool-version b/libmpx/mpxrt/libtool-version
new file mode 100644
index 0000000..5aa6ed7
--- /dev/null
+++ b/libmpx/mpxrt/libtool-version
@@ -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
+1:0:0
diff --git a/libmpx/mpxrt/mpxrt-utils.c b/libmpx/mpxrt/mpxrt-utils.c
new file mode 100644
index 0000000..db672c4
--- /dev/null
+++ b/libmpx/mpxrt/mpxrt-utils.c
@@ -0,0 +1,533 @@
+/* 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_ENABLE "CHKP_RT_ENABLE"
+#define MPX_RT_ENABLE_DEFAULT 1
+#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 set value for ENABLE bit.\n"
+ "\t\t\t ENABLE = 0 enable MPX feature\n"
+ "\t\t\t ENABLE = 1 disable MPX feature\n"
+ "\t\t\t [default: %d]\n", MPX_RT_ENABLE,
+ MPX_RT_ENABLE_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 void
+validate_enable (const char *env, int *enable)
+{
+ if (env == 0)
+ *enable = MPX_RT_ENABLE_DEFAULT;
+ else if (strcmp (env, "0") == 0)
+ *enable = 0;
+ else if (strcmp (env, "1") == 0)
+ *enable = 1;
+ else
+ {
+ __mpxrt_print (VERB_ERROR, "Illegal value '%s' for %s. Legal values "
+ "are [0 | 1]\nUsing default value %d\n",
+ env, MPX_RT_ENABLE, MPX_RT_ENABLE_DEFAULT);
+ *enable = MPX_RT_ENABLE_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, int *enable)
+{
+ 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_ENABLE);
+ env_var_list_add (MPX_RT_ENABLE, env);
+ validate_enable (env, enable);
+
+ 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 len = 0;
+
+ if (vt > verbose_val || base <= 1 || base > sizeof (digits))
+ return;
+
+ if (val < base)
+ str[len++] = digits[val];
+ else
+ while (val)
+ {
+ str[len++] = digits[val % base];
+ val = val / base;
+ }
+ str[len++] = 0;
+
+ __mpxrt_write (vt, str);
+}
+
+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);
+}
diff --git a/libmpx/mpxrt/mpxrt-utils.h b/libmpx/mpxrt/mpxrt-utils.h
new file mode 100644
index 0000000..a8380a5
--- /dev/null
+++ b/libmpx/mpxrt/mpxrt-utils.h
@@ -0,0 +1,65 @@
+/* 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, int *enable);
+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 */
diff --git a/libmpx/mpxrt/mpxrt.c b/libmpx/mpxrt/mpxrt.c
new file mode 100644
index 0000000..55bfcf4
--- /dev/null
+++ b/libmpx/mpxrt/mpxrt.c
@@ -0,0 +1,505 @@
+/* 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;
+
+/* 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 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))
+ {
+ __mpxrt_print (VERB_ERROR, "No MPX support\n");
+ return false;
+ }
+
+ return true;
+}
+
+static bool
+process_specific_finish (void)
+{
+ if (!check_mpx_support ())
+ return false;
+
+ if (prctl (44))
+ {
+ __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, &enable);
+ 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 ();
+}
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