Creating a C function without compiler generated prologue/epilogue & RET instruction?

Question

Consider this function:

void foo(){
    //do something
}

In assembly it would look something like this (not accurate):

push         


        

Answer 1

I am guessing you want the syntax of having a function without having the C compiler do anything. You can do this by linking to your assembly function, (and then it will need to of course copy the correct things onto the stack).

Your assembly routines just need an entry point for the C compiler to call, for instance:

The assembly portion would contain the following header:

global my_function 
my_function:
push r1
push r2
; Code 
ret

corresponding to:

void  my_function ( int arg1, char arg2 );