[ top-post not please do ] On Wed, Aug 07, 2019 at 10:48:58AM -0500, William Tambe wrote: > To expand on my previous reply, I would like to configure GCC so that > a callee does not need to save and restore registers that it is using > other than the frame-pointer and return-pointer registers. > The callee would not need to save and restore registers that it is > using because it would be assumed that the caller has saved all > registers that it is using. Then you need to define a new ABI for your target, and implement that in your target's GCC backend. Segher
