IBT/BTI instructions and D compilers

[Brian Callahan]

On Monday, 10 July 2023 at 14:45:48 UTC, Brian Callahan wrote:
> On Monday, 10 July 2023 at 14:19:38 UTC, Iain Buclaw wrote:
>> On Monday, 10 July 2023 at 13:25:37 UTC, Brian Callahan wrote:
>>> On Monday, 10 July 2023 at 13:08:03 UTC, Ernesto Castellotti 
>>> wrote:
>>>>
>>>> For LDC it should be very simple to do the same, it would be 
>>>> useful to open an issue in the LDC repo
>>>>
>>>> The real problem is DMD, I'm afraid it needs some tweaking 
>>>> in the backend
>>>
>>> Good idea. I made an Issue on GitHub for LDC and I made a 
>>> Bugzilla report for DMD.
>>
>> I did raise a bug report back in 2020
>>
>> https://issues.dlang.org/show_bug.cgi?id=20933
>>
>> I guess I didn't word it clearly enough. :-)
>
> Hi Iain --
>
> Yes, it is. We do enable it by default on OpenBSD :)
> More specifically, this is the -fcf-protection=branch flag -- 
> no shadow stack stuff here.

Actually, I take that back. We don't do the --enable-cet flag for 
libphobos (didn't know that existed). But we build all of GCC 
with -fcf-protection=branch.