Jakub Jelinek <ja...@redhat.com> writes:
> 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?
Gah, thanks. Clearly one of those days :-(
Richard
diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html
index b6341fda..9c2d9ea8 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>-fsanitize=shadow-call-stack</code></a>. This sanitizer currently
+ 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>
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