To adjust the behaviour of the stack extension code to your personal needs you may set some of the following variables (or functions)
‘unsigned long __stk_minframe’ (default: 32768)
Minimum amount of memory to allocate for a new stackframe. Setting a higher value speeds the code up but costs more memory if it is unused.
‘unsigned long __stk_safezone’ (default: 2048)
Size of the safety zone. Set this to a higher value if you want to call functions with lots of arguments.
‘unsigned long __stk_argbytes’ (default: 256)
Number of bytes copied as arguments. Set this to a higher value if your functions may have lots of arguments.
Is a user replaceable stack overflow handler. The default one just pops up a requester, then exits. This function is not allowed to return.