aboutsummaryrefslogtreecommitdiff
path: root/libssp
diff options
context:
space:
mode:
authorIgor Tsimbalist <igor.v.tsimbalist@intel.com>2018-02-19 17:25:49 +0100
committerIgor Tsimbalist <itsimbal@gcc.gnu.org>2018-02-19 17:25:49 +0100
commit14e335edc8c5c2cd18779e4e242a3d81037b8b43 (patch)
tree5439816d0ec4a7a72c403e59851b0b78e2d23c88 /libssp
parent65e3761d451229338a22226e154cb7d0bed5fcd1 (diff)
downloadgcc-14e335edc8c5c2cd18779e4e242a3d81037b8b43.zip
gcc-14e335edc8c5c2cd18779e4e242a3d81037b8b43.tar.gz
gcc-14e335edc8c5c2cd18779e4e242a3d81037b8b43.tar.bz2
CET shouldn't be enabled in 32-bit run-time libraries by defualt
ENDBR32 and RDSSPD are multi-byte NOPs on x86-64 processors and newer x86 processors, starting Pentium Pro. They are UD on older 32-bit processors. Detect this at configure time and adjust the default value for enable_cet. GCC will enable CET in 32-bit run-time libraries in any case if --enable-cet is used to configure GCC. PR target/84148 * config/cet.m4: Check if target support multi-byte NOPS (SSE). * libatomic/configure: Regenerate. * libbacktrace/configure: Likewise. * libgcc/configure: Likewise. * libgfortran/configure: Likewise. * libgomp/configure: Likewise. * libitm/configure: Likewise. * libmpx/configure: Likewise. * libobjc/configure: Likewise. * libquadmath/configure: Likewise. * libsanitizer/configure: Likewise. * libssp/configure: Likewise. * libstdc++-v3/configure: Likewise. * libvtv/configure: Likewise. From-SVN: r257809
Diffstat (limited to 'libssp')
-rw-r--r--libssp/ChangeLog5
-rwxr-xr-xlibssp/configure21
2 files changed, 23 insertions, 3 deletions
diff --git a/libssp/ChangeLog b/libssp/ChangeLog
index 66254fe..b5e8113 100644
--- a/libssp/ChangeLog
+++ b/libssp/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-14 Igor Tsimbalist <igor.v.tsimbalist@intel.com>
+
+ PR target/84148
+ * configure: Regenerate.
+
2018-01-03 Jakub Jelinek <jakub@redhat.com>
Update copyright years.
diff --git a/libssp/configure b/libssp/configure
index a96b391..df7bff7 100755
--- a/libssp/configure
+++ b/libssp/configure
@@ -4095,18 +4095,28 @@ else
fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for CET support" >&5
+$as_echo_n "checking for CET support... " >&6; }
+
case "$host" in
i[34567]86-*-linux* | x86_64-*-linux*)
case "$enable_cet" in
default)
- # Check if assembler supports CET.
+ # Check if target supports multi-byte NOPs
+ # and if assembler supports CET insn.
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
+
+#if !defined(__SSE2__)
+#error target does not support multi-byte NOPs
+#else
asm ("setssbsy");
+#endif
+
;
return 0;
}
@@ -4146,6 +4156,11 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
esac
if test x$enable_cet = xyes; then
CET_FLAGS="-fcf-protection -mcet"
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
fi
XCFLAGS="$XCFLAGS $CET_FLAGS"
@@ -10745,7 +10760,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 10748 "configure"
+#line 10763 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -10851,7 +10866,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 10854 "configure"
+#line 10869 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H