Re: [Qemu-devel] [PATCH] configure: Automatically fall back to TCI on non-release architectures

[Richard Henderson]

On 4/9/19 9:46 AM, Stefan Weil wrote:
> * Calling conventions. The current implementation works on many hosts,
> but for example not on Sparc. A fix would require simple calling
> conventions for all helper functions (for example stack based argument
> passing, can this be enforced?), or it needs to know the signature of
> each helper function at runtime. I'm afraid that fixing this would
> require much work. A runtime test whether calls of helper functions work
> correctly could be implemented easily and could abort the program
> execution when calls fail to pass the right arguments. Would such a
> runtime test help a little bit?

In the rewrite of tci that I proposed some years ago,
I used libffi for this.

Those patches could probably be recovered...

https://patchwork.ozlabs.org/patch/348528/
https://patchwork.ozlabs.org/patch/348527/


r~