Hello
I would recommend placing the function in a specific user defined section and placing the section at first in the section list within a PLACEMENT line.
There is one exception to that (as far as I can remember).
If you have a command INIT _EntryPoint in your .PRM file, then _ENTRY will be allocated in section .init (Which is predefined section for entry point) and then .init must be the first section in the section list.
Also make sure _EntryPoint is the only function in the user defined section.
CrasyCat