diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/ChangeLog | 4 | ||||
| -rw-r--r-- | config/cet.m4 | 38 |
2 files changed, 42 insertions, 0 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 90e1af477..2bb5244 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,7 @@ +2017-11-17 Igor Tsimbalist <igor.v.tsimbalist@intel.com> + + * cet.m4: New file. + 2017-11-15 Alexandre Oliva <aoliva@redhat.com> * bootstrap-debug-lean.mk (do-compare): Use the diff --git a/config/cet.m4 b/config/cet.m4 new file mode 100644 index 0000000..715f4bd --- /dev/null +++ b/config/cet.m4 @@ -0,0 +1,38 @@ +dnl +dnl GCC_CET_FLAGS +dnl (SHELL-CODE_HANDLER) +dnl +AC_DEFUN([GCC_CET_FLAGS],[dnl +GCC_ENABLE(cet, default, ,[enable Intel CET in target libraries], + permit yes|no|default) +case "$host" in + i[[34567]]86-*-linux* | x86_64-*-linux*) + case "$enable_cet" in + default) + # Check if assembler supports CET. + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [], + [asm ("setssbsy");])], + [enable_cet=yes], + [enable_cet=no]) + ;; + yes) + # Check if assembler supports CET. + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [], + [asm ("setssbsy");])], + [], + [AC_MSG_ERROR([assembler with CET support is required for --enable-cet])]) + ;; + esac + ;; + *) + enable_cet=no + ;; +esac +if test x$enable_cet = xyes; then + $1="-fcf-protection -mcet" +fi +]) |