mirror of git://gcc.gnu.org/git/gcc.git
51 lines
968 B
Plaintext
51 lines
968 B
Plaintext
dnl
|
|
dnl GCC_CET_FLAGS
|
|
dnl (SHELL-CODE_HANDLER)
|
|
dnl
|
|
AC_DEFUN([GCC_CET_FLAGS],[dnl
|
|
GCC_ENABLE(cet, no, ,[enable Intel CET in target libraries],
|
|
permit yes|no|auto)
|
|
AC_MSG_CHECKING([for CET support])
|
|
|
|
case "$host" in
|
|
i[[34567]]86-*-linux* | x86_64-*-linux*)
|
|
case "$enable_cet" in
|
|
auto)
|
|
# Check if target supports multi-byte NOPs
|
|
# and if assembler supports CET insn.
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[],
|
|
[
|
|
#if !defined(__SSE2__)
|
|
#error target does not support multi-byte NOPs
|
|
#else
|
|
asm ("setssbsy");
|
|
#endif
|
|
])],
|
|
[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 -mshstk"
|
|
AC_MSG_RESULT([yes])
|
|
else
|
|
AC_MSG_RESULT([no])
|
|
fi
|
|
])
|