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Procedure not requiring automatic register saves

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TemPiQ:
Please forgive me if this question has been asked already.
I have sought in the forum for some time now without success.

I  need a procedure that does not require automatic register saves or will not access the register spill area.
That means no need to use the EBP register

However if I code somthing like this:

--- Code: ---proc Sample1
    RDTSC
    MOV DWORD[EDI],EAX
    MOV EAX,EDI
    RETN
endproc

--- End code ---

nasm will compile as follows:

--- Code: ---Sample1:
    PUSH EBP
    MOV EBP,ESP
    RDTSC
    MOV DWORD[EDI],EAX
    MOV EAX,EDI
    RETN

--- End code ---

Thanks

@Frank Kotler:
Sorry I forgot the "endproc" which I have included now in the edited post

Frank Kotler:
"proc"? What is "proc"? Not Nasm.  Whatever it is, you probably want to get  rid of it, since it is apparently generating code you don't want.

Best,
Frank

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