diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/ChangeLog | 5 | ||||
| -rw-r--r-- | config/cet.m4 | 16 |
2 files changed, 19 insertions, 2 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index fd7f82fc779..746a0a01ba0 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,8 @@ +2018-02-14 Igor Tsimbalist <igor.v.tsimbalist@intel.com> + + PR target/84148 + * cet.m4: Check if target support multi-byte NOPS (SSE). + 2018-02-06 Eric Botcazou <ebotcazou@adacore.com> * gcc-plugin.m4 (GCC_ENABLE_PLUGINS): Remove -q option passed to grep. diff --git a/config/cet.m4 b/config/cet.m4 index 715f4bded19..23dd1f7d27d 100644 --- a/config/cet.m4 +++ b/config/cet.m4 @@ -5,15 +5,24 @@ dnl AC_DEFUN([GCC_CET_FLAGS],[dnl GCC_ENABLE(cet, default, ,[enable Intel CET in target libraries], permit yes|no|default) +AC_MSG_CHECKING([for CET support]) + 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. AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [], - [asm ("setssbsy");])], + [ +#if !defined(__SSE2__) +#error target does not support multi-byte NOPs +#else +asm ("setssbsy"); +#endif + ])], [enable_cet=yes], [enable_cet=no]) ;; @@ -34,5 +43,8 @@ case "$host" in esac if test x$enable_cet = xyes; then $1="-fcf-protection -mcet" + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) fi ]) |