Calling convention with multiple stack pointers

[v-p-b]

I have a kinky compiler that apparently uses different registers for keeping track of local variables and (stack-based) parameters passed to a function.

I'd expect something like this, but I don't think there is an attribute to specify a register that would point to the "callee stack":

<pentry>
  <addr register="gpr13"/>
</pentry>

How do I specify a calling convention so that Ghidra can keep track of the "callee stack" during decompilation?

Edit: The two registers actually point inside the same memory region (the "same stack"), close to each other. In essence this looks similar to x86's ESP-EBP.

(This is a cross-post from reddit, hope it's OK)

[virtuald]

I don't think there's a way to do it, but I'd like this also. I filed a bug at #5831.