[2/5] C-SKY port: Backend implementation

[Sandra Loosemore]

On 07/25/2018 07:16 AM, Paul Koning wrote:

> Non-executable stacks are a very good thing.
> 
> That said, I also looked at the target hook documentation and was
> left without any clue whatsoever.  It sure isn't clear what powers of
> two have to do with descriptors, or what descriptors have to do with
> support for nested functions.
> 
> Can you suggest places to look to get an understanding of this
> feature?  It sounds like the only other option is "Use the source,
> Luke".  Any specific targets that make a good reference
> implementation for this?

FYI, so far I have found PR ada/67205 and the original patch posting 
here, but it looks like "Use the source" is indeed where we are on this. 
  :-(

https://gcc.gnu.org/ml/gcc-patches/2016-06/msg02016.html

-Sandra