Message ID | 20210214172640.4809-1-hjl.tools@gmail.com |
---|---|
State | New |
Headers | show |
Series | GCC_CET_HOST_FLAGS: Check if host supports multi-byte NOPs | expand |
On Sun, Feb 14, 2021 at 9:26 AM H.J. Lu <hjl.tools@gmail.com> wrote: > > Check if host supports multi-byte NOPs before enabling CET on host. > > config/ > > PR binutils/27397 > * cet.m4 (GCC_CET_HOST_FLAGS): Check if host supports multi-byte > NOPs. > > libiberty/ > > PR binutils/27397 > * configure: Regenerated. > --- > config/cet.m4 | 19 ++++++++++++++++--- > libiberty/configure | 29 +++++++++++++++++++++++++++++ > 2 files changed, 45 insertions(+), 3 deletions(-) > > diff --git a/config/cet.m4 b/config/cet.m4 > index c67fb4f35b6..7718be1afe8 100644 > --- a/config/cet.m4 > +++ b/config/cet.m4 > @@ -130,6 +130,18 @@ fi > if test x$may_have_cet = xyes; then > if test x$cross_compiling = xno; then > AC_TRY_RUN([ > +int > +main () > +{ > + asm ("endbr32"); > + return 0; > +} > + ], > + [have_multi_byte_nop=yes], > + [have_multi_byte_nop=no]) > + have_cet=no > + if test x$have_multi_byte_nop = xyes; then > + AC_TRY_RUN([ > static void > foo (void) > { > @@ -155,9 +167,10 @@ main () > bar (); > return 0; > } > - ], > - [have_cet=no], > - [have_cet=yes]) > + ], > + [have_cet=no], > + [have_cet=yes]) > + fi > if test x$enable_cet = xno -a x$have_cet = xyes; then > AC_MSG_ERROR([Intel CET must be enabled on Intel CET enabled host]) > fi > diff --git a/libiberty/configure b/libiberty/configure > index 160b8c9e8b1..29a690d44fc 100755 > --- a/libiberty/configure > +++ b/libiberty/configure > @@ -5539,6 +5539,34 @@ else > cat confdefs.h - <<_ACEOF >conftest.$ac_ext > /* end confdefs.h. */ > > +int > +main () > +{ > + asm ("endbr32"); > + return 0; > +} > + > +_ACEOF > +if ac_fn_c_try_run "$LINENO"; then : > + have_multi_byte_nop=yes > +else > + have_multi_byte_nop=no > +fi > +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ > + conftest.$ac_objext conftest.beam conftest.$ac_ext > +fi > + > + have_cet=no > + if test x$have_multi_byte_nop = xyes; then > + if test "$cross_compiling" = yes; then : > + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 > +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} > +as_fn_error $? "cannot run test program while cross compiling > +See \`config.log' for more details" "$LINENO" 5; } > +else > + cat confdefs.h - <<_ACEOF >conftest.$ac_ext > +/* end confdefs.h. */ > + > static void > foo (void) > { > @@ -5575,6 +5603,7 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ > conftest.$ac_objext conftest.beam conftest.$ac_ext > fi > > + fi > if test x$enable_cet = xno -a x$have_cet = xyes; then > as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5 > fi > -- > 2.29.2 > If there are no objections, I will check it in on Wednesday.
diff --git a/config/cet.m4 b/config/cet.m4 index c67fb4f35b6..7718be1afe8 100644 --- a/config/cet.m4 +++ b/config/cet.m4 @@ -130,6 +130,18 @@ fi if test x$may_have_cet = xyes; then if test x$cross_compiling = xno; then AC_TRY_RUN([ +int +main () +{ + asm ("endbr32"); + return 0; +} + ], + [have_multi_byte_nop=yes], + [have_multi_byte_nop=no]) + have_cet=no + if test x$have_multi_byte_nop = xyes; then + AC_TRY_RUN([ static void foo (void) { @@ -155,9 +167,10 @@ main () bar (); return 0; } - ], - [have_cet=no], - [have_cet=yes]) + ], + [have_cet=no], + [have_cet=yes]) + fi if test x$enable_cet = xno -a x$have_cet = xyes; then AC_MSG_ERROR([Intel CET must be enabled on Intel CET enabled host]) fi diff --git a/libiberty/configure b/libiberty/configure index 160b8c9e8b1..29a690d44fc 100755 --- a/libiberty/configure +++ b/libiberty/configure @@ -5539,6 +5539,34 @@ else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ +int +main () +{ + asm ("endbr32"); + return 0; +} + +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + have_multi_byte_nop=yes +else + have_multi_byte_nop=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + + have_cet=no + if test x$have_multi_byte_nop = xyes; then + if test "$cross_compiling" = yes; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run test program while cross compiling +See \`config.log' for more details" "$LINENO" 5; } +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + static void foo (void) { @@ -5575,6 +5603,7 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ conftest.$ac_objext conftest.beam conftest.$ac_ext fi + fi if test x$enable_cet = xno -a x$have_cet = xyes; then as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5 fi