On Tue, Nov 11, 2014 at 4:34 PM, Ilya Enkovich <enkovich....@gmail.com> wrote:
> Hi,
>
> This patch integrates MPX runtime library into GCC source tree. MPX runtime
> is responsible for initialization of MPX feature in HW, signal handling,
> reporting etc. Library is linked to codes compiled with -mmpx.
What happens if you omit -mmpx from the linker command-line?
What happens if you mix -mmpx and non -mmpx objects?
I wonder why this is not part of glibc and whether initialization is needed
is communicated by some ELF flag in the executable/library which
is determined by the linker.
Richard.
> Bootstrap is OK for x86_64-unknown-linux-gnu. OK for trunk?
>
> Thanks,
> Ilya
> --
> 2014-11-11 Ilya Enkovich <ilya.enkov...@intel.com>
>
> * Makefile.def: Add libmpx.
> * configure.ac: Add libmpx.
> * Makefile.in: Regenerate.
> * configure: Regenerate.
>
> gcc/
>
> 2014-11-11 Ilya Enkovich <ilya.enkov...@intel.com>
>
> * gcc.c (MPX_SPEC): New.
> (LINK_COMMAND_SPEC): Add MPX_SPEC.
>
> libmpx/
>
> 2014-11-11 Ilya Enkovich <ilya.enkov...@intel.com>
>
> Initial commit.
>
> diff --git a/Makefile.def b/Makefile.def
> index dcbcd08..49e3c6f 100644
> --- a/Makefile.def
> +++ b/Makefile.def
> @@ -133,6 +133,9 @@ 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 2f0af4a..95fbab1 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 \
> @@ -572,6 +573,25 @@ 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-*-*)
> @@ -2612,6 +2632,11 @@ 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/gcc.c b/gcc/gcc.c
> index e013d52..200704b 100644
> --- a/gcc/gcc.c
> +++ b/gcc/gcc.c
> @@ -804,6 +804,13 @@ proper position among the other output files. */
> %{fvtable-verify=preinit: -lvtv -u_vtable_map_vars_start
> -u_vtable_map_vars_end}}"
> #endif
>
> +#ifndef MPX_SPEC
> +#define MPX_SPEC "\
> +%{!nostdlib:%{!nodefaultlibs:%{mmpx:\
> + %{static:%nMPX runtime is disabled due to -static used}\
> + %{!static:-lmpx}}}}"
> +#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. */
> @@ -824,6 +831,7 @@ 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.enkov...@intel.com>
> +
> + Initial checkin.
> diff --git a/libmpx/Makefile.am b/libmpx/Makefile.am
> new file mode 100644
> index 0000000..c6b479f
> --- /dev/null
> +++ b/libmpx/Makefile.am
> @@ -0,0 +1,41 @@
> +ACLOCAL_AMFLAGS = -I .. -I ../config
> +
> +SUBDIRS = mpxrt
> +
> +# 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)" \
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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
> +dnl libtool.m4 into aclocal.m4, while still arranging for automake to
> +dnl add a definition of LIBTOOL to Makefile.in.
> +ifelse(,,,[AC_SUBST(LIBTOOL)
> +AC_DEFUN([AM_PROG_LIBTOOL])
> +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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> +# 2005, 2006, 2007, 2008, 2009 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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> + [disable], [m4_define([am_maintainer_other], [enable])],
> + [m4_define([am_maintainer_other], [enable])
> + m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE:
> $1])])
> +AC_MSG_CHECKING([whether to am_maintainer_other maintainer-specific portions
> of Makefiles])
> + dnl maintainer-mode's default is 'disable' unless 'enable' is passed
> + AC_ARG_ENABLE([maintainer-mode],
> +[ --][am_maintainer_other][-maintainer-mode am_maintainer_other make rules
> and dependencies not useful
> + (and sometimes confusing) to the casual installer],
> + [USE_MAINTAINER_MODE=$enableval],
> + [USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no],
> [yes]))
> + AC_MSG_RESULT([$USE_MAINTAINER_MODE])
> + AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
> + MAINT=$MAINTAINER_MODE_TRUE
> + AC_SUBST([MAINT])dnl
> +]
> +)
> +
> +AU_DEFUN([jm_MAINTAINER_MODE], [AM_MAINTAINER_MODE])
> +
> +# 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.
> +AC_DEFUN([AM_PROG_CC_C_O],
> +[AC_REQUIRE([AC_PROG_CC_C_O])dnl
> +AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
> +AC_REQUIRE_AUX_FILE([compile])dnl
> +# FIXME: we rely on the cache variable name because
> +# there is no other way.
> +set dummy $CC
> +am_cc=`echo $[2] | sed ['s/[^a-zA-Z0-9_]/_/g;s/^[0-9]/_/']`
> +eval am_t=\$ac_cv_prog_cc_${am_cc}_c_o
> +if test "$am_t" != yes; then
> + # Losing compiler, so override with the script.
> + # FIXME: It is wrong to rewrite CC.
> + # But if we don't then we get into trouble of one sort or another.
> + # A longer-term fix would be to have automake use am__CC in this case,
> + # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
> + CC="$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])
> +$1=${$1-"${am_missing_run}$2"}
> +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 $am_aux_dir in
> + *\ * | *\ *)
> + MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
> + *)
> + MISSING="\${SHELL} $am_aux_dir/missing" ;;
> + esac
> +fi
> +# Use eval to expand $SHELL
> +if eval "$MISSING --run true"; then
> + am_missing_run="$MISSING --run "
> +else
> + am_missing_run=
> + AC_MSG_WARN([`missing' script is too old or missing])
> +fi
> +])
> +
> +# 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 $(MKDIR_P) for the sake of
> +dnl Makefile.ins that do not define MKDIR_P, so we do our own
> +dnl adjustment using top_builddir (which is defined more often than
> +dnl MKDIR_P).
> +AC_SUBST([mkdir_p], ["$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_]], [_])])
> +
> +# _AM_SET_OPTION(NAME)
> +# ------------------------------
> +# Set option NAME. Presently that only means defining a flag for this
> option.
> +AC_DEFUN([_AM_SET_OPTION],
> +[m4_define(_AM_MANGLE_OPTION([$1]), 1)])
> +
> +# _AM_SET_OPTIONS(OPTIONS)
> +# ----------------------------------
> +# OPTIONS is a space-separated list of Automake options.
> +AC_DEFUN([_AM_SET_OPTIONS],
> +[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
> +
> +# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
> +# -------------------------------------------
> +# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
> +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])
> +# Just in case
> +sleep 1
> +echo timestamp > conftest.file
> +# Reject unsafe characters in $srcdir or the absolute working directory
> +# name. Accept space and tab only in the latter.
> +am_lf='
> +'
> +case `pwd` in
> + *[[\\\"\#\$\&\'\`$am_lf]]*)
> + AC_MSG_ERROR([unsafe absolute working directory name]);;
> +esac
> +case $srcdir in
> + *[[\\\"\#\$\&\'\`$am_lf\ \ ]]*)
> + AC_MSG_ERROR([unsafe srcdir value: `$srcdir']);;
> +esac
> +
> +# Do `set' in a subshell so we don't clobber the current shell's
> +# arguments. Must try -L first in case configure is actually a
> +# symlink; some systems play weird games with the mod time of symlinks
> +# (eg FreeBSD returns the mod time of the symlink's containing
> +# directory).
> +if (
> + set X `ls -Lt "$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 $srcdir/configure"; then
> +
> + # If neither matched, then we have a broken ls. This can happen
> + # if, for instance, CONFIG_SHELL is bash and it inherits a
> + # broken ls alias from the environment. This has actually
> + # happened. Such a system could not be considered "sane".
> + AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
> +alias in your environment])
> + fi
> +
> + test "$[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
> +# will honor the `STRIP' environment variable to overrule this program.
> +dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
> +if test "$cross_compiling" != no; then
> + 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.
> +# This macro is traced by Automake.
> +AC_DEFUN([_AM_SUBST_NOTMAKE])
> +
> +# AM_SUBST_NOTMAKE(VARIABLE)
> +# ---------------------------
> +# Public sister of _AM_SUBST_NOTMAKE.
> +AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
> +
> +# 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.
> +# FORMAT should be one of `v7', `ustar', or `pax'.
> +#
> +# Substitute a variable $(am__tar) that is a command
> +# writing to stdout a FORMAT-tarball containing the directory
> +# $tardir.
> +# tardir=directory && $(am__tar) > result.tar
> +#
> +# Substitute a variable $(am__untar) that extract such
> +# a tarball read from stdin.
> +# $(am__untar) < result.tar
> +AC_DEFUN([_AM_PROG_TAR],
> +[# Always define AMTAR for backward compatibility.
> +AM_MISSING_PROG([AMTAR], [tar])
> +m4_if([$1], [v7],
> + [am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
> + [m4_case([$1], [ustar],, [pax],,
> + [m4_fatal([Unknown tar format])])
> +AC_MSG_CHECKING([how to create a $1 tar archive])
> +# Loop over all known methods to create a tar archive until one works.
> +_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
> +_am_tools=${am_cv_prog_tar_$1-$_am_tools}
> +# Do not fold the above two line into one, because Tru64 sh and
> +# Solaris sh will not grok spaces in the rhs of `-'.
> +for _am_tool in $_am_tools
> +do
> + case $_am_tool in
> + gnutar)
> + for _am_tar in tar gnutar gtar;
> + do
> + AM_RUN_LOG([$_am_tar --version]) && break
> + done
> + am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf -
> "'"$$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
> + # ustar tarball either.
> + (tar --version) >/dev/null 2>&1 && continue
> + 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
> + ;;
> + esac
> +
> + # If the value was cached, stop now. We just wanted to have am__tar
> + # and am__untar set.
> + test -n "${am_cv_prog_tar_$1}" && break
> +
> + # tar/untar a dummy directory, and stop if the command works
> + rm -rf conftest.dir
> + mkdir conftest.dir
> + echo GrepMe > conftest.dir/file
> + AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
> + rm -rf conftest.dir
> + if test -s conftest.tar; then
> + AM_RUN_LOG([$am__untar <conftest.tar])
> + grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
> + fi
> +done
> +rm -rf conftest.dir
> +
> +AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
> +AC_MSG_RESULT([$am_cv_prog_tar_$1])])
> +AC_SUBST([am__tar])
> +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/configure.ac b/libmpx/configure.ac
> new file mode 100644
> index 0000000..e017569
> --- /dev/null
> +++ b/libmpx/configure.ac
> @@ -0,0 +1,122 @@
> +# -*- 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="-ldl -lpthread"
> +AC_SUBST(link_libmpx)
> +
> +AM_INIT_AUTOMAKE(foreign no-dist no-dependencies)
> +AM_ENABLE_MULTILIB(, ..)
> +AM_MAINTAINER_MODE
> +
> +# 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])
> +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/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..d896ca6
> --- /dev/null
> +++ b/libmpx/mpxrt/Makefile.am
> @@ -0,0 +1,40 @@
> +## Makefile for the Intel MPX runtime library.
> +##
> +## Copyright (C) 2014 Free Software Foundation, Inc.
> +##
> +## Process this file with automake to produce Makefile.in.
> +##
> +## This file is part of the Intel MPX run-time Library. This
> +## library is free software; you can redistribute it and/or modify it
> +## under the terms of the GNU General Public License as published by
> +## the Free Software Foundation; either version 3, or (at your option)
> +## any later version.
> +
> +## This library 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 library; see the file COPYING3. If not see
> +## <http://www.gnu.org/licenses/>.
> +
> +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)/../include
> +AM_CFLAGS = $(XCFLAGS)
> +
> +toolexeclib_LTLIBRARIES = libmpx.la
> +
> +libmpx_la_SOURCES = mpxrt.c mpxrt-sigaction.c mpxrt-utils.c
> +
> +libmpx_la_LDFLAGS = -version-info `grep -v '^\#' $(srcdir)/libtool-version`
> $(link_libmpx)
> +
> +mpxrt.lo: mpxrt-utils.h
> +mpxrt-sigaction.lo: mpxrt-sigaction.h
> +mpxrt-utils.lo: mpxrt-utils.h
> +endif
> 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-sigaction.c b/libmpx/mpxrt/mpxrt-sigaction.c
> new file mode 100644
> index 0000000..6b676f7
> --- /dev/null
> +++ b/libmpx/mpxrt/mpxrt-sigaction.c
> @@ -0,0 +1,151 @@
> +/* mpxrt-sigaction.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.
> + *
> + **************************************************************************/
> +
> +#include "mpxrt-sigaction.h"
> +#include <assert.h>
> +
> +#include <malloc.h>
> +#include <stdio.h>
> +#include <memory.h>
> +#include <stdlib.h>
> +#include <pthread.h>
> +
> +#define __USE_GNU
> +#include <dlfcn.h>
> +
> +const static void* one = (void*)1;
> +const static void* zero = (void*)0;
> +
> +typedef int (*sigact_fptr)(int, const struct sigaction *, struct sigaction
> *);
> +
> +static struct sigaction old_sigaction;
> +
> +static sigact_fptr sigact_f = 0;
> +static pthread_key_t tlsKey = 0;
> +
> +/*
> + * Hide libc implementation. If sig num in not SIGSEGV call the
> + * original sigaction. If sig num is SIGSEGV store the handler
> + * for later calling.
> + */
> +int
> +sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
> +{
> + if (sig == SIGSEGV)
> + {
> + if (oact != 0)
> + memcpy (oact, &old_sigaction, sizeof (struct sigaction));
> +
> + if (act != 0)
> + {
> + memcpy (&old_sigaction, act, sizeof (struct sigaction));
> + return 0;
> + }
> + }
> + else
> + {
> + assert (sigact_f != 0);
> + return (*sigact_f)(sig, act, oact);
> + }
> +}
> +
> +/*
> + * set handler for SIGSEGV signal. does not returns the oact to prevent
> + * confusion in oact state. since we do not know what will be called
> + * first app's sigaction or runtime's register_sigsegv.
> + */
> +int
> +register_sigsegv_handler (int sig, const struct sigaction *act)
> +{
> + int res;
> +
> + assert (sig == SIGSEGV);
> + assert (sigact_f != 0);
> +
> + return (*sigact_f) (sig, act, 0);
> +}
> +
> +void
> +do_exit (void)
> +{
> + fprintf (stderr, "Segmentation fault\n");
> + exit (254);
> +}
> +
> +/* trying to call the stored handler */
> +void
> +handle_sigsegv (int signum, siginfo_t* si, void* vucontext)
> +{
> + if (old_sigaction.sa_handler == SIG_IGN
> + || old_sigaction.sa_handler == SIG_DFL)
> + do_exit ();
> +
> + if (pthread_getspecific (tlsKey) == one)
> + if((old_sigaction.sa_flags & SA_NODEFER) != SA_NODEFER)
> + do_exit ();
> + if ((old_sigaction.sa_flags & SA_SIGINFO) == SA_SIGINFO)
> + {
> + pthread_setspecific (tlsKey, one);
> + (*old_sigaction.sa_sigaction) (signum, si, vucontext);
> + }
> + else
> + {
> + pthread_setspecific (tlsKey, one);
> + (*old_sigaction.sa_handler) (signum);
> + }
> + pthread_setspecific (tlsKey,zero);
> +}
> +
> +/*
> + * set constructor priority to one to make it run before the
> + * constructor in mpx_rt.c
> + */
> +void __attribute__ ((constructor (1000)))
> +mpx_sig_init (void)
> +{
> + /* init old_sigaction to the default handler */
> + sigact_f = (sigact_fptr)dlsym (RTLD_NEXT, "sigaction");
> + if (sigact_f == 0)
> + {
> + fprintf (stderr, "ERROR: could not find function sigaction\n");
> + exit (1);
> + }
> + (*sigact_f) (SIGSEGV, 0, &old_sigaction);
> + pthread_key_create (&tlsKey, 0);
> +}
> diff --git a/libmpx/mpxrt/mpxrt-sigaction.h b/libmpx/mpxrt/mpxrt-sigaction.h
> new file mode 100644
> index 0000000..194304c
> --- /dev/null
> +++ b/libmpx/mpxrt/mpxrt-sigaction.h
> @@ -0,0 +1,44 @@
> +/* mpxrt-sigaction.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.
> + *
> + **************************************************************************/
> +
> +#include <signal.h>
> +
> +int sigaction (int sig, const struct sigaction *act, struct sigaction *oact);
> +int register_sigsegv_handler (int sig, const struct sigaction *act);
> +void handle_sigsegv (int signum, siginfo_t* si, void* vucontext);
> diff --git a/libmpx/mpxrt/mpxrt-utils.c b/libmpx/mpxrt/mpxrt-utils.c
> new file mode 100644
> index 0000000..73b1d2a
> --- /dev/null
> +++ b/libmpx/mpxrt/mpxrt-utils.c
> @@ -0,0 +1,431 @@
> +/* 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.
> + *
> + **************************************************************************/
> +
> +#include "mpxrt-utils.h"
> +#include <stdio.h>
> +#include <stdarg.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <limits.h>
> +#include <pthread.h>
> +
> +#define OUT_ENV "CHKP_RT_OUT_FILE"
> +#define ERR_ENV "CHKP_RT_ERR_FILE"
> +#define MPX_RT_VERBOSE "CHKP_RT_VERBOSE"
> +#define MPX_CHKPTR_MODE "CHKP_RT_MODE"
> +#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_DEFUALT 0
> +#define MPX_RT_BNDPRESERVE_DEFUALT_STR "0"
> +#define MPX_RT_PRINT_SUMMARY "CHKP_RT_PRINT_SUMMARY"
> +#define MPX_RT_MEMORY_UPPER_LIMIT "CHKP_RT_MEMORY_UPPER_LIMIT"
> +
> +#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;
> +
> +static FILE *out;
> +static FILE *err;
> +static char out_name[MAX_FILE_NAME];
> +static char err_name[MAX_FILE_NAME];
> +static int out_file_dirty;
> +static int err_file_dirty;
> +static int verbose_val;
> +static int add_pid;
> +static int summary;
> +static int files_overwritten;
> +static long mem_upper_limit;
> +static mpx_rt_mode_t mode;
> +static pthread_mutex_t lock;
> +static env_var_list_t env_var_list;
> +
> +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 (sizeof (env_var_t));
> + n->env_name = (char *)malloc (strlen (env) + 1);
> + n->env_val = (char *)malloc (strlen (val) + 1);
> +
> + strcpy (n->env_name, env);
> + strcpy (n->env_val, val);
> +
> + n->next = 0;
> +
> + 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;
> +}
> +
> +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 ();
> + sprintf (file_name, "%s.%d", env, pid);
> + }
> + else
> + sprintf (file_name, "%s", env);
> +
> + *file = fopen (file_name, "w");
> + 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 = getenv (OUT_ENV);
> + err_env = getenv (ERR_ENV);
> +
> + if (add_pid == 0 && (out_env!=0 || err_env!=0)) {
> + fprintf(stderr, "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 ()
> +{
> + char *out_env;
> + char *err_env;
> +
> + out_env = getenv (OUT_ENV);
> + err_env = getenv (ERR_ENV);
> +
> + if (add_pid == 0 && (out_env != 0 || err_env != 0))
> + files_overwritten = 1;
> +}
> +
> +static verbose_type
> +set_mpx_rt_mode (const char *env)
> +{
> + if (env == 0)
> + return MPX_RT_COUNT;
> + else if (strcmp(env, "stop") == 0)
> + return MPX_RT_STOP;
> + else if (strcmp(env,"count") == 0)
> + return MPX_RT_COUNT;
> +
> + fprintf (out, "Illegal value '%s' for %s. Legal values are [stop |
> count]\n",
> + env, MPX_CHKPTR_MODE);
> +
> + exit(1);
> +}
> +
> +static void
> +print_help ()
> +{
> + fprintf (out, "Point Lookout Runtime environment variables help.\n");
> +
> + fprintf (out, "%s \t set output file for info & debug [default: stdout]\n",
> + OUT_ENV);
> + fprintf (out, "%s \t set output file for error [default: stderr]\n",
> ERR_ENV);
> + 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, VERB_BR);
> + fprintf (out, "%s \t\t set mpx runtime behavior on #BR exception."
> + " [stop,count]\n"
> + "\t\t\t [default: count]\n", MPX_CHKPTR_MODE);
> + 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: %s]\n", MPX_RT_BNDPRESERVE,
> + MPX_RT_BNDPRESERVE_DEFUALT_STR);
> + fprintf (out, "%s \t print summary at the end of the run\n"
> + "\t\t\t [default: yes]\n", MPX_RT_PRINT_SUMMARY);
> + fprintf (out, "%s \t\t set mpx related physical memory upper limit\n"
> + "\t\t\t [default: 0]\n", MPX_RT_MEMORY_UPPER_LIMIT);
> +
> + fprintf (out, "%s \t\t print this help and exit.\n"
> + "\t\t\t [default: no]\n", MPX_RT_HELP);
> +
> + exit (0);
> +}
> +
> +static int
> +validate_bndpreserve (const char* env, int* bndpreserve)
> +{
> + if (env == 0)
> + {
> + bndpreserve = MPX_RT_BNDPRESERVE_DEFUALT;
> + return 1;
> + }
> +
> + if (strcmp(env, "0") == 0)
> + {
> + *bndpreserve = 0;
> + return 1;
> + }
> +
> + if (strcmp(env, "1") == 0)
> + {
> + *bndpreserve = 1;
> + return 1;
> + }
> +
> + fprintf (out, "Illegal value '%s' for %s. Legal values are [0 | 1]\n",
> + env, MPX_RT_BNDPRESERVE);
> +
> + return 0;
> +}
> +
> +static int
> +init_verbose_val (const char* env)
> +{
> + if (env == 0)
> + return VERB_BR;
> + else if (strcmp(env, "0") == 0)
> + return 0;
> + else if (strcmp(env, "1") == 0)
> + return 1;
> + else if (strcmp(env, "2") == 0)
> + return 2;
> + else if (strcmp(env, "3") == 0)
> + return 3;
> +
> + fprintf(out, "Illegal value '%s' for %s. Legal values are [0..3]\n",
> + env, MPX_RT_VERBOSE);
> +
> + return 0;
> +}
> +
> +
> +void
> +mpxrt_init_env_vars (int* bndpreserve)
> +{
> + char *out_env;
> + char *err_env;
> + char *env;
> + int res;
> +
> + pthread_mutex_init (&lock, NULL);
> +
> + out_env = getenv (OUT_ENV);
> + env_var_list_add (OUT_ENV, out_env);
> +
> + err_env = getenv (ERR_ENV);
> + env_var_list_add (ERR_ENV, err_env);
> +
> + env = getenv (MPX_RT_ADDPID);
> + env_var_list_add (MPX_RT_ADDPID, env);
> +
> + if (env != 0)
> + add_pid = 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;
> +
> + env = getenv (MPX_RT_VERBOSE);
> + env_var_list_add (MPX_RT_VERBOSE, env);
> + verbose_val = init_verbose_val (env);
> +
> + env = getenv (MPX_CHKPTR_MODE);
> + env_var_list_add (MPX_CHKPTR_MODE, env);
> + mode = set_mpx_rt_mode (env);
> +
> + env = getenv (MPX_RT_BNDPRESERVE);
> + env_var_list_add (MPX_RT_BNDPRESERVE, env);
> + res = validate_bndpreserve (env, bndpreserve);
> + if (res == 0)
> + exit (1);
> +
> + env = getenv (MPX_RT_MEMORY_UPPER_LIMIT);
> + env_var_list_add (MPX_RT_MEMORY_UPPER_LIMIT, env);
> + mem_upper_limit = 0;
> + if (env)
> + {
> + mem_upper_limit = atol (env);
> + if (mem_upper_limit < 0)
> + mem_upper_limit = 0;
> + }
> +
> + env = getenv (MPX_RT_PRINT_SUMMARY);
> + summary = 1;
> + if (env && strcmp (env, "yes") != 0)
> + {
> + summary = 0;
> + env_var_list_add (MPX_RT_PRINT_SUMMARY, env);
> + }
> +
> + env = getenv (MPX_RT_HELP);
> + if (env && strcmp (env, "yes") == 0)
> + 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);
> +}
> +
> +void mpxrt_utils_free ()
> +{
> + if (files_overwritten)
> + fprintf(out,"\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_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);
> + pthread_mutex_unlock (&lock);
> + va_end (argp);
> +}
> +
> +mpx_rt_mode_t
> +mpxrt_mode ()
> +{
> + return mode;
> +}
> +
> +static void
> +env_var_print_summary ()
> +{
> + env_var_t* node;
> +
> + fprintf (out,"\nUsed environment variables:\n");
> +
> + node = env_var_list.first;
> + while (node != 0)
> + {
> + fprintf (out, "%s = %s\n", node->env_name, node->env_val);
> + node = node->next;
> + }
> + out_file_dirty = 1;
> +}
> +
> +void
> +mpxrt_print_summary (uint64_t num_brs,uint64_t l1_size)
> +{
> +
> + if (summary == 0)
> + return;
> +
> + fprintf (out, "\nPoint Lookout run time summary:\n");
> + fprintf (out, "number of BRs: %lld.\n", num_brs);
> + fprintf (out, "size of allocated L1: %uB\n", l1_size);
> +
> + env_var_print_summary ();
> +}
> diff --git a/libmpx/mpxrt/mpxrt-utils.h b/libmpx/mpxrt/mpxrt-utils.h
> new file mode 100644
> index 0000000..2dc3e45
> --- /dev/null
> +++ b/libmpx/mpxrt/mpxrt-utils.h
> @@ -0,0 +1,63 @@
> +/* 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_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..b9bd2bd
> --- /dev/null
> +++ b/libmpx/mpxrt/mpxrt.c
> @@ -0,0 +1,502 @@
> +/* 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 _GNU_SOURCE
> +#include <stdio.h>
> +#include <string.h>
> +#include <stdint.h>
> +#include <stdbool.h>
> +#include <signal.h>
> +#include <assert.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <fcntl.h>
> +#include <sys/mman.h>
> +#include <sys/ipc.h>
> +#include <sys/shm.h>
> +
> +#include "mpxrt-utils.h"
> +
> +#ifdef __i386__
> +
> +/* i386 directory size is 4MB */
> +#define NUM_L1_BITS 20
> +#define NUM_L2_BITS 10
> +#define NUM_IGN_BITS 2
> +#define MPX_L2_NODE_ADDR_MASK 0xfffffffcUL
> +
> +#define REG_IP_IDX REG_EIP
> +#define REX_PREFIX
> +
> +#define XSAVE_OFFSET_IN_FPMEM sizeof (struct _libc_fpstate)
> +
> +static inline void
> +__cpuid (unsigned int *eax, unsigned int *ebx,
> + unsigned int *ecx, unsigned int *edx)
> +{
> + /* ecx is often an input as well as an output. */
> + asm volatile ("push %%ebx;"
> + "cpuid;"
> + "mov %%ebx, %1;"
> + "pop %%ebx"
> + : "=a" (*eax),
> + "=g" (*ebx),
> + "=c" (*ecx),
> + "=d" (*edx)
> + : "0" (*eax), "2" (*ecx));
> +}
> +
> +#else /* __i386__ */
> +
> +/* x86_64 directory size is 2GB */
> +#define NUM_L1_BITS 28
> +#define NUM_L2_BITS 17
> +#define NUM_IGN_BITS 3
> +#define MPX_L2_NODE_ADDR_MASK 0xfffffffffffffff8ULL
> +
> +#define REG_IP_IDX REG_RIP
> +#define REX_PREFIX "0x48, "
> +
> +#define XSAVE_OFFSET_IN_FPMEM 0
> +
> +static inline void __cpuid (unsigned int *eax, unsigned int *ebx,
> + unsigned int *ecx, unsigned int *edx)
> +{
> + /* ecx is often an input as well as an output. */
> + asm volatile ("cpuid;"
> + : "=a" (*eax),
> + "=b" (*ebx),
> + "=c" (*ecx),
> + "=d" (*edx)
> + : "0" (*eax), "2" (*ecx));
> +}
> +
> +#endif /* !__i386__ */
> +
> +#define BNDSTA_ADDR_MASK 0xfffffffffffffffcULL
> +#define BNDSTA_REASON_MASK 0xfffffffffffffffcULL
> +#define BNDPRESERVE_BIT 1
> +
> +typedef unsigned long ULONG;
> +
> +const ULONG MPX_L1_SIZE = (1UL << NUM_L1_BITS) * sizeof (ULONG);
> +const ULONG MPX_MAX_L1_INDEX = (1UL << NUM_L1_BITS);
> +const ULONG MPX_L2_NODE_SIZE = (1UL << NUM_L2_BITS) * (sizeof (ULONG) * 4);
> +
> +static int bndpreserve;
> +
> +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));
> +
> +void *l1base = NULL;
> +
> +uint8_t __attribute__ ((__aligned__ (64))) buffer[4096];
> +struct xsave_struct *xsave_buf = (struct xsave_struct *)buffer;
> +
> +uint64_t num_bnd_chk = 0;
> +
> +#define handle_error(msg) \
> + do { perror (msg); exit (EXIT_FAILURE); } while (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)
> +{
> + 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++;
> + uint8_t ss = sib >> 6;
> + 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 signum, siginfo_t* si, void* vucontext,
> + struct xsave_struct *xsave_buf)
> +{
> + 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_print (VERB_DEBUG, "Saw a #BR! status 0x%llx at %016llx\n",
> + status, ip);
> +
> + 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_print (VERB_ERROR,"Unexpected status with bound
> exception:%llx\n",
> + status);
> + break;
> + }
> + }
> + else if (trapno == 14)
> + mpxrt_print (VERB_ERROR, "In signal handler, trapno = %d, ip =
> %016llx\n",
> + trapno, ip);
> + else
> + mpxrt_print (VERB_ERROR, "unexpected trap %d! at %016llx\n", trapno, ip);
> +
> + handle_sigsegv (signum, si, vucontext);
> +}
> +
> +/*
> + * 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.
> + */
> +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 inline void
> +cpuid_count (unsigned int op, int count,
> + unsigned int *eax, unsigned int *ebx,
> + unsigned int *ecx, unsigned int *edx)
> +{
> + *eax = op;
> + *ecx = count;
> + __cpuid (eax, ebx, ecx, edx);
> +}
> +
> +bool
> +check_mpx_support (void)
> +{
> + unsigned int eax, ebx, ecx, edx;
> +
> + cpuid_count (1, 0, &eax, &ebx, &ecx, &edx);
> +
> + if ((!(ecx & (1 << 26))) || (!(ecx & (1 << 27))))
> + return false;
> +
> + cpuid_count (0, 0, &eax, &ebx, &ecx, &edx);
> +
> + if (eax < 0xD)
> + return false;
> +
> + cpuid_count (0xD, 0, &eax, &ebx, &ecx, &edx);
> +
> + if ((eax & 0x18) != 0x18)
> + return false;
> +
> + if ((xgetbv (0) & 0x18) != 0x18)
> + return false;
> +
> + return true;
> +}
> +
> +void
> +enable_mpx (void* l1base)
> +{
> + /* enable point lookup */
> + memset (buffer, 0, sizeof (buffer));
> + xrstor_state (xsave_buf, 0x18);
> +
> + xsave_buf->xsave_hdr.xstate_bv = 0x10;
> + xsave_buf->bndcsr.cfg_reg_u = (unsigned long)l1base | 1;
> + xsave_buf->bndcsr.status_reg = 0;
> +
> + xrstor_state (xsave_buf, 0x10);
> +}
> +
> +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)
> + {
> + handle_error ("mmap");
> + return false;
> + }
> +
> + enable_mpx (l1base);
> +
> + if (prctl (43))
> + {
> + mpxrt_print (VERB_ERROR, "no MPX support\n");
> + return false;
> + }
> +
> + return true;
> +}
> +
> +bool
> +process_specific_finish (void)
> +{
> + if (prctl (44)) {
> + mpxrt_print (VERB_ERROR, "no MPX support\n");
> + return false;
> + }
> +
> + munmap (l1base, MPX_L1_SIZE);
> +
> + return true;
> +}
> +
> +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 = register_sigsegv_handler (signum, &newact);
> + assert (r == 0);
> +}
> +
> +/*
> + * set constructor priority to two to make it run after the
> + * constructor in sigaction.c
> + */
> +void __attribute__ ((constructor (1005))) mpx_prepare (void)
> +{
> + mpxrt_init_env_vars (&bndpreserve);
> + mpxrt_print (VERB_DEBUG, "mpx: hello...\n");
> + setup_handler ();
> + process_specific_init ();
> +}
> +
> +void __attribute__ ((destructor)) mpx_cleanup (void)
> +{
> + mpxrt_print_summary (num_bnd_chk, MPX_L1_SIZE);
> + mpxrt_utils_free ();
> + process_specific_finish ();
> +}
> +
