From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,69431b06fe9a3239
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news4.google.com!proxad.net!feeder1-2.proxad.net!feeder.erje.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: How do I disable elaboration code on this
Date: Sat, 09 Apr 2011 18:01:46 +0100
Organization: A noiseless patient Spider
Message-ID: <m2sjtrtl39.fsf@pushface.org>
References: 
 <58bc4fb4-5f6a-48d6-9c98-0dde7ac619df@p16g2000vbo.googlegroups.com>
	<inq539$3tn$1@tornado.tornevall.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Info: mx02.eternal-september.org;
 posting-host="dFCm8HWntFqmDIilBLqEJQ";
	logging-data="7828"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX18pV4RazqKQZrNKB/xwIo1xHeu0O5sPFa0="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (darwin)
Cancel-Lock: sha1:pAGFEfbgWzxPv9c8TrxO8lvVegc=
	sha1:k5T28mE9vLvPgPi9w40zECFXm8M=
Xref: g2news2.google.com comp.lang.ada:19701
Date: 2011-04-09T18:01:46+01:00
List-Id: <comp.lang.ada>

Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org> writes:

> On 04/09/2011 06:58 AM, Lucretia wrote:
>> The following code will not compile no matter what I do. Basically, I
>> want to write the startup code for Cortex-M3 in Ada with no assembly.
>> So, the ISR code needs to be elaboration free as it's the first bit of
>> code that would run on reset.
>
>>     Vector : constant Vectors :=
>>       (Dummy'Access,
>>        Dummy'Access,
>>        Dummy'Access,
>>        Dummy'Access);
>>     pragma Convention (C, Vector);
>>     for Vector'Address use Addr;
>
> I think what you need here is
>
> Vector : constant Vectors;
> pragma Import (Ada, Vector);
> for Vector'Address use Addr;
>
> since you don't want Vector to be initialized.
>
> Vector will not be initialized because you have pragma Import for it.
>
> Note that you don't need procedure Dummy.

But the real code will have actual ISR procedures. OP is merely sparing
us the unnecessary detail of the real ISRs.