On Mon, Oct 11, 2021 at 8:42 AM Dan Li <ashimida@xxxxxxxxxxxxxxxxx> wrote:
On 10/10/21 11:43 PM, Miguel Ojeda wrote:
On Sun, Oct 10, 2021 at 5:16 PM Dan Li <ashimida@xxxxxxxxxxxxxxxxx> wrote:
- This option enables Clang's Shadow Call Stack, which uses a
- shadow stack to protect function return addresses from being
- overwritten by an attacker. More information can be found in
- Clang's documentation:
+ This option enables Clang/GCC plugin's Shadow Call Stack, which
+ uses a shadow stack to protect function return addresses from
+ being overwritten by an attacker. More information can be found
+ in Clang's documentation:
Perhaps it could be worded in a better way? It sounds like it is a
custom plugin for Clang as well, e.g.:
This option enables Shadow Call Stack (in the case of GCC, as a plugin),
Cheers,
Miguel
Thanks Miguel.
How about writing like this:
This option enables Shadow Call Stack (supported as a compiler option in
the case of clang, supported as a plugin in the case of gcc), which uses
a shadow stack to ...
That sounds reasonable.
One question I have Dan, what is your sense for getting this feature
landed upstream in GCC proper? It's neat to be able to use plugins to
support older versions of a compiler than when the feature initially
lands; I was curious if you're working to submit this into GCC as
well? I didn't see anything in GCC's bug tracker for "shadow call
stack," but maybe there's a different feature bug tracking this?