The offset-into-the-current-segment register (EIP) is not normally accessible. However, there is a hackish-way to read it indirectly - you trick the program into pushing the value of EIP onto the stack, then just read it off. You could create a subroutine that looks like this:
GetAddress:
mov eax, [esp]
ret
...
call GetAddress ; address of this line stored in eax
Or, even simpler:
call NextLine
NextLine:
pop eax ; address of previous line stored in EAX
If you use a CALL FAR instruction, the segment value (CS) will be pushed on the stack as well.
If you're using C, there are various compiler-specific C-extensions you could use on this page. See also this interesting article.
