On Tue, Feb 22, 2022 at 10:11:06AM +0000, Richard Sandiford via Gcc-patches
wrote:
> Document ShadowCallStack support. The option link doesn't work yet
> of course, but I checked that it works with gcc-12.1.0/ removed.
>
> OK to install?
>
> Thanks,
> Richard
>
>
> ---
> htdocs/gcc-12/changes.html | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html
> index b6341fda..216ee0b6 100644
> --- a/htdocs/gcc-12/changes.html
> +++ b/htdocs/gcc-12/changes.html
> @@ -96,6 +96,17 @@ a work-in-progress.</p>
> Note that default vectorizer cost model has been changed which used to
> behave
> as <code>-fvect-cost-model=cheap</code> were specified.
> </li>
> + <li>
> + GCC now supports the
> + <a href="https://clang.llvm.org/docs/ShadowCallStack.html";>
> + ShadowCallStack</a> sanitizer, which can be enabled using the
> + command-line option
> + <a
> href="https://gcc.gnu.org/onlinedocs/gcc-12.1.0/gcc/Instrumentation-Options.html#index-fsanitize_003dshadow-call-stack";>
> + <code>-fshadow-call-stack</code></a>. This sanitizer currently
The option is -fsanitize=shadow-call-stack , no?
> + only works on AArch64 targets and it requires an environment in
> + which all code has been compiled with <code>-ffixed-r18</code>.
> + Its primary initial user is the Linux kernel.
> + </li>
> </ul>
>
Jakub
