PING^1: [PATCH 24/24] Intel CET: Document --enable-cet

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Wed, Jun 13, 2018 at 8:32 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>         * NEWS: Mention --enable-cet.
>         * manual/install.texi: Document --enable-cet.
>         * INSTALL: Regenerated.
> ---
>  INSTALL             | 11 +++++++++++
>  NEWS                | 10 ++++++++++
>  manual/install.texi | 10 ++++++++++
>  3 files changed, 31 insertions(+)
>
> diff --git a/INSTALL b/INSTALL
> index 052b1b6f89..5e6d80480b 100644
> --- a/INSTALL
> +++ b/INSTALL
> @@ -106,6 +106,17 @@ if 'CFLAGS' is specified it must enable optimization.  For example:
>       programs and tests are created as dynamic position independent
>       executables (PIE) by default.
>
> +'--enable-cet'
> +     Enable Intel Control-flow Enforcement Technology (CET) support.
> +     When the library is built with -enable-cet, the resulting glibc is
> +     protected with indirect branch tracking (IBT) and shadow stack
> +     (SHSTK).  CET-enabled glibc is compatible with all existing
> +     executables and shared libraries.  This feature is currently
> +     supported on i386, x86_64 and x32 with GCC 8 and binutils 2.29 or
> +     later.  Note that CET-enabled glibc requires CPUs capable of
> +     multi-byte NOPs, like x86-64 processors as well as Intel Pentium
> +     Pro or newer.
> +
>  '--disable-profile'
>       Don't build libraries with profiling information.  You may want to
>       use this option if you don't plan to do profiling.
> diff --git a/NEWS b/NEWS
> index d51fa09544..e914336557 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -9,6 +9,16 @@ Version 2.28
>
>  Major new features:
>
> +* The GNU C Library can now be compiled with support for Intel CET, AKA
> +  Intel Control-flow Enforcement Technology.  When the library is built
> +  with --enable-cet, the resulting glibc is protected with indirect
> +  branch tracking (IBT) and shadow stack (SHSTK).  CET-enabled glibc is
> +  compatible with all existing executables and shared libraries.  This
> +  feature is currently supported on i386, x86_64 and x32 with GCC 8 and
> +  binutils 2.29 or later.  Note that CET-enabled glibc requires CPUs
> +  capable of multi-byte NOPs, like x86-64 processors as well as Intel
> +  Pentium Pro or newer.
> +
>  * <math.h> functions that round their results to a narrower type are added
>    from TS 18661-1:2014 and TS 18661-3:2015:
>
> diff --git a/manual/install.texi b/manual/install.texi
> index 4bbbfcffa5..62aec719d7 100644
> --- a/manual/install.texi
> +++ b/manual/install.texi
> @@ -137,6 +137,16 @@ with no-pie.  The resulting glibc can be used with the GCC option,
>  PIE.  This option also implies that glibc programs and tests are created
>  as dynamic position independent executables (PIE) by default.
>
> +@item --enable-cet
> +Enable Intel Control-flow Enforcement Technology (CET) support.  When
> +the library is built with --enable-cet, the resulting glibc is protected
> +with indirect branch tracking (IBT) and shadow stack (SHSTK)@.  CET-enabled
> +glibc is compatible with all existing executables and shared libraries.
> +This feature is currently supported on i386, x86_64 and x32 with GCC 8 and
> +binutils 2.29 or later.  Note that CET-enabled glibc requires CPUs capable
> +of multi-byte NOPs, like x86-64 processors as well as Intel Pentium Pro or
> +newer.
> +
>  @item --disable-profile
>  Don't build libraries with profiling information.  You may want to use
>  this option if you don't plan to do profiling.
> --
> 2.17.1
>

PING.


-- 
H.J.