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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Kernel Syscall from Ada?
Date: Thu, 23 Jun 2016 17:18:12 -0500
Organization: JSA Research & Innovation
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Date: 2016-06-23T17:18:12-05:00
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"Diogenes" <phathax0r@gmail.com> wrote in message 
news:2048d6d6-04e2-4e2c-9483-e3769da59781@googlegroups.com...
>Is there a simple way to make a direct (Linux)Kernel syscall from Ada 
>without
>using the system C library? i.e. Make a direct call as in Assembler?

On almost all modern systems, a system call IS a call to some C subprogram. 
(On Windows, they're calls into a DLL; Linux appears similar although I've 
never studied the details.) There's nothing like the set-registers and trap 
like there was in the old days on MS-DOS, XENIX, and other systems.

So the only way to make a system call is via aspect Import to the needed C 
routine. (On Windows, I''d expect that a program that didn't do any system 
calls would be much smaller than a "normal" program; Windows needs some 
stuff added to every program; it doesn't have anything to do with Ada 
per-se.)

                                  Randy.