From efc643e90d0e75d3e003644404d4e29f84f274e6 Mon Sep 17 00:00:00 2001
From: Igor Tsimbalist <igor.v.tsimbalist@intel.com>
Date: Fri, 17 Nov 2017 22:18:15 +0100
Subject: [PATCH] Enable building libatomic with Intel CET
libatomic/
* configure.ac: Set CET_FLAGS, update XCFLAGS.
* acinclude.m4: Add cet.m4 and enable.m4.
* configure: Regenerate.
* Makefile.in: Likewise.
* testsuite/Makefile.in: Likewise.
From-SVN: r254893
---
libatomic/ChangeLog | 8 ++++
libatomic/Makefile.in | 3 +-
libatomic/acinclude.m4 | 2 +
libatomic/configure | 76 ++++++++++++++++++++++++++++++++-
libatomic/configure.ac | 4 ++
libatomic/testsuite/Makefile.in | 3 +-
6 files changed, 92 insertions(+), 4 deletions(-)
diff --git a/libatomic/ChangeLog b/libatomic/ChangeLog
index eed12e63a688..bc254ece628c 100644
--- a/libatomic/ChangeLog
+++ b/libatomic/ChangeLog
@@ -1,3 +1,11 @@
+2017-11-17 Igor Tsimbalist <igor.v.tsimbalist@intel.com>
+
+ * configure.ac: Set CET_FLAGS, update XCFLAGS.
+ * acinclude.m4: Add cet.m4 and enable.m4.
+ * configure: Regenerate.
+ * Makefile.in: Likewise.
+ * testsuite/Makefile.in: Likewise.
+
2017-10-20 Richard Earnshaw <rearnsha@arm.com>
* Makefile.am: (IFUNC_OPTIONS): Set the architecture to
diff --git a/libatomic/Makefile.in b/libatomic/Makefile.in
index 0f0382e0713f..fac9bae6e1ff 100644
--- a/libatomic/Makefile.in
+++ b/libatomic/Makefile.in
@@ -75,7 +75,8 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
$(top_srcdir)/../ltoptions.m4 $(top_srcdir)/../ltsugar.m4 \
$(top_srcdir)/../ltversion.m4 $(top_srcdir)/../lt~obsolete.m4 \
$(top_srcdir)/acinclude.m4 $(top_srcdir)/../libtool.m4 \
- $(top_srcdir)/configure.ac
+ $(top_srcdir)/../config/enable.m4 \
+ $(top_srcdir)/../config/cet.m4 $(top_srcdir)/configure.ac
am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
$(ACLOCAL_M4)
am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \
diff --git a/libatomic/acinclude.m4 b/libatomic/acinclude.m4
index 383218f933f0..bb6308bfa4fd 100644
--- a/libatomic/acinclude.m4
+++ b/libatomic/acinclude.m4
@@ -632,6 +632,8 @@ AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
dnl ----------------------------------------------------------------------
sinclude(../libtool.m4)
+sinclude(../config/enable.m4)
+sinclude(../config/cet.m4)
dnl The lines below arrange for aclocal not to bring an installed
dnl libtool.m4 into aclocal.m4, while still arranging for automake to
dnl add a definition of LIBTOOL to Makefile.in.
diff --git a/libatomic/configure b/libatomic/configure
index e88a7b8c5531..e49313fbf929 100755
--- a/libatomic/configure
+++ b/libatomic/configure
@@ -764,6 +764,7 @@ with_gnu_ld
enable_libtool_lock
enable_maintainer_mode
enable_symvers
+enable_cet
with_gcc_major_version_only
'
ac_precious_vars='build_alias
@@ -1410,6 +1411,8 @@ Optional Features:
(and sometimes confusing) to the casual installer
--enable-symvers=STYLE enables symbol versioning of the shared library
[default=yes]
+ --enable-cet enable Intel CET in target libraries
+ [default=default]
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
@@ -11115,7 +11118,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11118 "configure"
+#line 11121 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -11221,7 +11224,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11224 "configure"
+#line 11227 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -15225,6 +15228,75 @@ if test "x$GCC" = "xyes"; then
XCFLAGS="$XCFLAGS -Wall -Werror"
fi
+# Add CET specific flags if CET is enabled
+ # Check whether --enable-cet was given.
+if test "${enable_cet+set}" = set; then :
+ enableval=$enable_cet;
+ case "$enableval" in
+ yes|no|default) ;;
+ *) as_fn_error "Unknown argument to enable/disable cet" "$LINENO" 5 ;;
+ esac
+
+else
+ enable_cet=default
+fi
+
+
+case "$host" in
+ i[34567]86-*-linux* | x86_64-*-linux*)
+ case "$enable_cet" in
+ default)
+ # Check if assembler supports CET.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+asm ("setssbsy");
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ enable_cet=yes
+else
+ enable_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+ yes)
+ # Check if assembler supports CET.
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+asm ("setssbsy");
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+ as_fn_error "assembler with CET support is required for --enable-cet" "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ ;;
+ esac
+ ;;
+ *)
+ enable_cet=no
+ ;;
+esac
+if test x$enable_cet = xyes; then
+ CET_FLAGS="-fcf-protection -mcet"
+fi
+
+XCFLAGS="$XCFLAGS $CET_FLAGS"
+
XCFLAGS="$XCFLAGS $XPCFLAGS"
diff --git a/libatomic/configure.ac b/libatomic/configure.ac
index 023f1727b1e9..bf7315e78d1b 100644
--- a/libatomic/configure.ac
+++ b/libatomic/configure.ac
@@ -238,6 +238,10 @@ if test "x$GCC" = "xyes"; then
XCFLAGS="$XCFLAGS -Wall -Werror"
fi
+# Add CET specific flags if CET is enabled
+GCC_CET_FLAGS(CET_FLAGS)
+XCFLAGS="$XCFLAGS $CET_FLAGS"
+
XCFLAGS="$XCFLAGS $XPCFLAGS"
AC_SUBST(config_path)
diff --git a/libatomic/testsuite/Makefile.in b/libatomic/testsuite/Makefile.in
index adfc231484a6..a95e3ca8e8ab 100644
--- a/libatomic/testsuite/Makefile.in
+++ b/libatomic/testsuite/Makefile.in
@@ -64,7 +64,8 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
$(top_srcdir)/../ltoptions.m4 $(top_srcdir)/../ltsugar.m4 \
$(top_srcdir)/../ltversion.m4 $(top_srcdir)/../lt~obsolete.m4 \
$(top_srcdir)/acinclude.m4 $(top_srcdir)/../libtool.m4 \
- $(top_srcdir)/configure.ac
+ $(top_srcdir)/../config/enable.m4 \
+ $(top_srcdir)/../config/cet.m4 $(top_srcdir)/configure.ac
am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
$(ACLOCAL_M4)
mkinstalldirs = $(SHELL) $(top_srcdir)/../mkinstalldirs
--
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