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From: dewar@cs.nyu.edu (Robert Dewar)
Subject: Re: An Interface question
Date: 1996/07/16
Message-ID: <dewar.837561755@schonberg>#1/1
X-Deja-AN: 168582123
references: <4sgmgc$n66@idiom.com>
organization: Courant Institute of Mathematical Sciences
newsgroups: comp.lang.ada
Date: 1996-07-16T00:00:00+00:00
List-Id: <comp.lang.ada>


"I'm using an m68k OS (AmigaOS) where system calls expect arguments in
registers, not on the stack as normal convention has it.

I've been reading all Ada95 documents I have but I haven't found a way
to express that convention either for me to access a system call  or
to provide one."


What should be done is that your Ada95 compiler should have a convention
called perhaps System_Call that provides arguments in registers as
required. Then you write

   pragma Import (System_Call, name-of-system-routine);

Obviously there is nothing in the Ada95 documents about this, since it is
highly implementation specific, but a convention such as the one above
is the proper way of handling things.