Entry and exit code

Each Pascal procedure and function begins and ends with standard epilog and prolog code.

Intel 80x86 standard routine prolog / epilog

Standard entry code for procedures and functions is as follows on the 80x86 architecture:

   pushl   %ebp
   movl    %esp,%ebp

The generated exit sequence for procedure and functions looks as follows:

   leave
   ret  $xx

Where xx is the total size of the pushed parameters.

To have more information on function return values take a look at section Code issues.

Motorola 680x0 standard routine prolog / epilog

Standard entry code for procedures and functions is as follows on the 680x0 architecture:

   move.l  a6,-(sp)
   move.l  sp,a6

The generated exit sequence for procedure and functions looks as follows (in the default processor mode):

   unlk   a6
   rtd    #xx

Where xx is the total size of the pushed parameters.

To have more information on function return values take a look at section Code issues.