Re: GCC's -fsplit-stack disturbing Mach's vm_allocate

[Richard Braun]

On Sat, Jun 22, 2013 at 12:52:03AM +0200, Thomas Schwinge wrote:
> But anyway, what is the split-stack run-time/startup code doing so that
> it makes vm_allocate behave erratically?  Isn't vm_allocate a real system
> call after all, but relies on some threadvar state?  It's now too late to
> figure it out today, and I have enough other things on my plate anyway.
> But surely Richard and/or Samuel will have some comments on this?  ;-)

Unless I'm mistaken, vm_allocate (along with vm_map and vm_deallocate)
is never used through a real system call but always as an RPC from the
Hurd. To make sure that's the case, see if rpctrace catches the call.

-- 
Richard Braun