| Message ID | 20240110020210.2062140-1-hongtao.liu@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | Update documents for fcf-protection= | expand |
On Tue, Jan 9, 2024 at 6:02 PM liuhongt <hongtao.liu@intel.com> wrote: > > After r14-2692-g1c6231c05bdcca, the option is defined as EnumSet and > -fcf-protection=branch won't unset any others bits since they're in > different groups. So to override -fcf-protection, an explicit > -fcf-protection=none needs to be added and then with > -fcf-protection=XXX > > Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. > Ok for trunk? > > gcc/ChangeLog: We should mention: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113039 > * doc/invoke.texi (fcf-protection=): Update documents. > --- > gcc/doc/invoke.texi | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi > index 68d1f364ac0..d1e6fafb98c 100644 > --- a/gcc/doc/invoke.texi > +++ b/gcc/doc/invoke.texi > @@ -17734,6 +17734,9 @@ function. The value @code{full} is an alias for specifying both > @code{branch} and @code{return}. The value @code{none} turns off > instrumentation. > > +To override @option{-fcf-protection}, @option{-fcf-protection=none} > +needs to be explicitly added and then with @option{-fcf-protection=xxx}. > + > The value @code{check} is used for the final link with link-time > optimization (LTO). An error is issued if LTO object files are > compiled with different @option{-fcf-protection} values. The > -- > 2.31.1 >
On Thu, Jan 11, 2024 at 12:06 AM H.J. Lu <hjl.tools@gmail.com> wrote: > > On Tue, Jan 9, 2024 at 6:02 PM liuhongt <hongtao.liu@intel.com> wrote: > > > > After r14-2692-g1c6231c05bdcca, the option is defined as EnumSet and > > -fcf-protection=branch won't unset any others bits since they're in > > different groups. So to override -fcf-protection, an explicit > > -fcf-protection=none needs to be added and then with > > -fcf-protection=XXX > > > > Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. > > Ok for trunk? > > > > gcc/ChangeLog: > > We should mention: > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113039 Changed, and committed. > > > * doc/invoke.texi (fcf-protection=): Update documents. > > --- > > gcc/doc/invoke.texi | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi > > index 68d1f364ac0..d1e6fafb98c 100644 > > --- a/gcc/doc/invoke.texi > > +++ b/gcc/doc/invoke.texi > > @@ -17734,6 +17734,9 @@ function. The value @code{full} is an alias for specifying both > > @code{branch} and @code{return}. The value @code{none} turns off > > instrumentation. > > > > +To override @option{-fcf-protection}, @option{-fcf-protection=none} > > +needs to be explicitly added and then with @option{-fcf-protection=xxx}. > > + > > The value @code{check} is used for the final link with link-time > > optimization (LTO). An error is issued if LTO object files are > > compiled with different @option{-fcf-protection} values. The > > -- > > 2.31.1 > > > > > -- > H.J.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 68d1f364ac0..d1e6fafb98c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -17734,6 +17734,9 @@ function. The value @code{full} is an alias for specifying both @code{branch} and @code{return}. The value @code{none} turns off instrumentation. +To override @option{-fcf-protection}, @option{-fcf-protection=none} +needs to be explicitly added and then with @option{-fcf-protection=xxx}. + The value @code{check} is used for the final link with link-time optimization (LTO). An error is issued if LTO object files are compiled with different @option{-fcf-protection} values. The
After r14-2692-g1c6231c05bdcca, the option is defined as EnumSet and -fcf-protection=branch won't unset any others bits since they're in different groups. So to override -fcf-protection, an explicit -fcf-protection=none needs to be added and then with -fcf-protection=XXX Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. Ok for trunk? gcc/ChangeLog: * doc/invoke.texi (fcf-protection=): Update documents. --- gcc/doc/invoke.texi | 3 +++ 1 file changed, 3 insertions(+)