[LLVMdev] TLS with MCJIT (an experimental patch)

Keno Fischer kfischer at college.harvard.edu
Sun Jan 19 21:30:55 PST 2014

I'd like to take a crack at this. Was there any more progress or work I
should be aware off?


On Wed, May 22, 2013 at 1:28 PM, Rafael EspĂ­ndola <
rafael.espindola at gmail.com> wrote:

> On 22 May 2013 12:30, Kaylor, Andrew <andrew.kaylor at intel.com> wrote:
> > To clarify, MCJIT currently has no GOT support whatsoever for ELF with
> x86-64 and ARM (and probably others).
> No, I added a bare minimal to get EH working...
> >  My experimental patch was meant as an attempt to get TLS working with
> static relocation model and small code model.  It's the combination of
> these two that requires memory in the lower 2GB.  MCJIT works with static
> and large, but the MC code generator has a problem with TLS and large code
> model.
> I see. Yes, on that model codegen would produce local exec TLS model
> and we would only need R_X86_64_TPOFF32 (and making sure the code was
> close to the tls block).
> > Obviously we just need to get PIC support in place for MCJIT.
> Agreed.
> Thanks,
> Rafael
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