[llvm-dev] retpoline mitigation and 6.0

Chandler Carruth via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 6 16:26:13 PST 2018

On Tue, Feb 6, 2018 at 4:16 PM Chandler Carruth <chandlerc at google.com>

> On Tue, Feb 6, 2018 at 2:56 PM David Woodhouse <dwmw2 at infradead.org>
> wrote:
>> At this point, what we really want is for identical thunks to have
>> identical names — just like we do for builtins and other stuff, to avoid
>> having differences between clang and GCC which just end up seeming
>> capricious and being hard to work around. Having matching command line
>> options would be a bonus, but isn't imperative.
> After talking to several others (to make sure we don't have to do this
> whole thing yet again) we'll change the external thunk names to match what
> GCC is using. Hopefully this doesn't come back to bite us. =]

What name do we use for when the target address is pushed onto the stack?
What are the semantics? Is there a spec anywheere?

LLVM only needs this on 32-bit x86, but we do kind of need an answer before
we update all of our branches with new names.....
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