[PATCH] Add support for StackMap section for ELF/Linux systems

[Andrew Trick]

> On Jul 17, 2014, at 3:32 PM, Philip Reames <listmail at philipreames.com> wrote:
> 
> This patch emits the StackMap section on ELF systems.  This is required to support llvm.experimental.stackmap and llvm.experimental.patchpoint.  
> 
> Careful review is appreciated.  I don't know the areas I'm touching well and may have gotten things wrong.  A couple of things for specific review:
> - Are the flags to getELFSection correct?
> - Should I change the name of label following the section start?
> 
> Worth noting is that previous versions of this patch have been proposed but not submitted several times.  For example, one was proposed here:
> http://comments.gmane.org/gmane.comp.compilers.llvm.cvs/171038

I’m also not qualified to comment on how you should use ELF sections. Copying Lang and Eric C.

-Andy
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