Re: Which lean C compiler for 32-bit OS development

From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c
Subject	Re: Which lean C compiler for 32-bit OS development
Date	2011-12-15 11:18 +1300
Message-ID	<9kslm8FhipU16@mid.individual.net> (permalink)
References	(9 earlier) <04e13574-fa0b-4da7-bd9c-a5580641e6b9@c18g2000yqj.googlegroups.com> <slrnjecq0f.1qlp.usenet-nospam@guild.seebs.net> <2479530a-3206-4384-908b-3c74a05f1bbf@f5g2000yqg.googlegroups.com> <slrnjed06a.1v0t.usenet-nospam@guild.seebs.net> <eabdbd0c-4116-4d22-bac8-238bfba1f28b@m10g2000vbc.googlegroups.com>

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On 12/15/11 10:00 AM, James Harris wrote:

<snips>

> I know I could have worked with a shell round an existing calling
> convention but whatever I considered would not have been even remotely
> as efficient.

The wrapper, if present (some compilers are smart/OS aware enough to 
inline them), the overhead of a wrapper is trivial compared to the 
actual call into kernel space.

> In this case the calling convention does influence the
> design because I wouldn't have been able to come up with the design
> that I have if I couldn't make the calling efficient.

You appear to be hung up on potential efficiency, have you actually made 
some real world measurements?

>>> C provides sized integers, it provides both signed and unsigned
>>> integers. It provides pointers that can refer to almost anything
>>> including functions and I can rely on the size of those pointers (on a
>>> given compiler).
>>
>> There can be *at least* three distinct classes of pointers.  Real systems
>> have existed on which pointer-to-function, pointer-to-struct, and
>> pointer-to-void were three different kinds of objects, and not
>> interchangeable.  I suspect at least a few are still in use.
>
> What sort of systems? Do you mean, "compilers" or "operating systems"
> or something else?

I've used systems with separate data and programme memory (with 
different bus widths), so data pointers were a different beast form 
function pointers.  Google Harvard architecture

-- 
Ian Collins

Thread

Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-11-12 01:22 -0800
  Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-12 10:36 +0100
    Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-11-12 02:09 -0800
      Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-12 11:37 +0100
        Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-11-12 08:02 -0800
          Re: Which lean C compiler for 32-bit OS development Borax Man <rotflol2@hotmail.com> - 2011-11-13 10:24 +1100
          Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-13 10:29 +0100
        Re: Which lean C compiler for 32-bit OS development BGB <cr88192@hotmail.com> - 2011-11-12 15:06 -0700
    Re: Which lean C compiler for 32-bit OS development "ankh" <star67@venus.gov> - 2011-11-12 22:43 -0600
      Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-14 21:57 +0100
        Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-11-15 10:16 +1300
        Re: Which lean C compiler for 32-bit OS development "Jo" <none@none.none> - 2011-11-19 22:59 -0600
          Re: Which lean C compiler for 32-bit OS development "BartC" <bc@freeuk.com> - 2011-11-20 12:58 +0000
            Re: Which lean C compiler for 32-bit OS development Fritz Wuehler <fritz@spamexpire-201111.rodent.frell.theremailer.net> - 2011-11-21 07:30 +0100
              Re: Which lean C compiler for 32-bit OS development "Jo" <none@none.none> - 2011-11-21 01:01 -0600
            Re: Which lean C compiler for 32-bit OS development "Jo" <none@none.none> - 2011-11-21 00:51 -0600
            Re: Which lean C compiler for 32-bit OS development Brian <nospam@nospam.com> - 2011-11-22 16:47 +0000
              Re: Which lean C compiler for 32-bit OS development James Kuyper <jameskuyper@verizon.net> - 2011-11-22 12:10 -0500
                Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-22 20:24 +0100
              Re: Which lean C compiler for 32-bit OS development Richard Sanders <lnr729@gmail.com> - 2011-11-22 10:58 -0800
                Re: Which lean C compiler for 32-bit OS development Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-24 00:27 -0800
              Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-22 20:13 +0100
                Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-23 23:13 +0100
              Re: Which lean C compiler for 32-bit OS development Friedrich Dominicus <just-for-news-frido@q-software-solutions.de> - 2011-11-23 06:28 +0100
                Re: Which lean C compiler for 32-bit OS development Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-23 02:45 -0800
                Re: Which lean C compiler for 32-bit OS development Willem <willem@toad.stack.nl> - 2011-11-23 10:57 +0000
                Re: Which lean C compiler for 32-bit OS development Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-11-24 01:31 -0800
              Re: Which lean C compiler for 32-bit OS development "BartC" <bc@freeuk.com> - 2011-11-23 10:58 +0000
              Re: Which lean C compiler for 32-bit OS development Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-24 00:26 -0800
    Re: Which lean C compiler for 32-bit OS development Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-14 01:33 -0800
      Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-11-14 17:13 +0000
        Re: Which lean C compiler for 32-bit OS development Joe Wright <joewwright@comcast.net> - 2011-11-14 14:36 -0500
        Re: Which lean C compiler for 32-bit OS development Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-15 00:56 -0800
  Re: Which lean C compiler for 32-bit OS development Nobody <nobody@nowhere.com> - 2011-11-13 02:59 +0000
    Re: Which lean C compiler for 32-bit OS development Joe Wright <joewwright@comcast.net> - 2011-11-12 22:13 -0500
      Re: Which lean C compiler for 32-bit OS development "ankh" <star67@venus.gov> - 2011-11-13 00:03 -0600
      Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-14 21:55 +0100
        Re: Which lean C compiler for 32-bit OS development Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-11-15 00:56 -0800
        Re: Which lean C compiler for 32-bit OS development ImpalerCore <jadill33@gmail.com> - 2011-11-15 07:05 -0800
          Re: Which lean C compiler for 32-bit OS development Keith Thompson <kst-u@mib.org> - 2011-11-15 14:42 -0800
            Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-16 00:17 +0100
            Re: Which lean C compiler for 32-bit OS development ImpalerCore <jadill33@gmail.com> - 2011-11-15 17:50 -0800
    Re: Which lean C compiler for 32-bit OS development BGB <cr88192@hotmail.com> - 2011-11-12 20:38 -0700
      Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-11-13 00:00 -0800
        Re: Which lean C compiler for 32-bit OS development BGB <cr88192@hotmail.com> - 2011-11-13 01:23 -0700
        Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-11-13 09:10 +0000
          Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-13 10:33 +0100
            Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-11-13 23:03 +1300
              Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-11-13 11:17 +0100
          Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-10 11:29 -0800
            Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-12-11 09:57 +1300
              Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-10 14:26 -0800
                Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-12-11 11:38 +1300
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-10 16:01 -0800
                Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-12-11 13:18 +1300
                Re: Which lean C compiler for 32-bit OS development Robert Wessel <robertwessel2@yahoo.com> - 2011-12-10 22:50 -0600
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 11:25 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-11 03:45 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 12:06 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-12 20:02 +0000
                Re: Which lean C compiler for 32-bit OS development John Tsiombikas <nuclear@member.fsf.org> - 2011-12-13 06:28 +0000
                Re: Which lean C compiler for 32-bit OS development Robert Wessel <robertwessel2@yahoo.com> - 2011-12-13 00:32 -0600
                Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-12-13 10:57 +0100
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-10 23:20 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 12:38 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-12 20:15 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 13:51 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-12 22:32 +0000
                Re: Which lean C compiler for 32-bit OS development John Tsiombikas <nuclear@member.fsf.org> - 2011-12-13 06:40 +0000
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-13 09:19 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-17 00:52 -0800
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-14 13:00 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-14 21:53 +0000
                Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-12-15 11:18 +1300
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-15 11:16 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-15 19:35 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-15 13:03 -0800
                Re: Which lean C compiler for 32-bit OS development Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-12-16 03:55 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-16 19:50 +0000
                Re: Which lean C compiler for 32-bit OS development Robert Wessel <robertwessel2@yahoo.com> - 2011-12-12 16:54 -0600
                Re: Which lean C compiler for 32-bit OS development Ian Collins <ian-news@hotmail.com> - 2011-12-13 12:03 +1300
                Re: Which lean C compiler for 32-bit OS development Robert Wessel <robertwessel2@yahoo.com> - 2011-12-12 17:19 -0600
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-15 11:52 -0800
                Re: Which lean C compiler for 32-bit OS development Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-12 18:34 -0500
                Re: Which lean C compiler for 32-bit OS development "io_x" <a@b.c.invalid> - 2011-12-13 09:43 +0100
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-15 11:33 -0800
            Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-10 21:13 +0000
              Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-10 15:10 -0800
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-10 23:31 +0000
                Re: Which lean C compiler for 32-bit OS development jacob navia <jacob@spamsink.net> - 2011-12-11 01:57 +0100
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 11:46 -0800
                Re: Which lean C compiler for 32-bit OS development James Kuyper <jameskuyper@verizon.net> - 2011-12-12 15:23 -0500
                Re: Which lean C compiler for 32-bit OS development Seebs <usenet-nospam@seebs.net> - 2011-12-12 20:02 +0000
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 14:00 -0800
                Re: Which lean C compiler for 32-bit OS development James Kuyper <jameskuyper@verizon.net> - 2011-12-12 17:24 -0500
                Re: Which lean C compiler for 32-bit OS development Robert Wessel <robertwessel2@yahoo.com> - 2011-12-12 17:06 -0600
                Re: Which lean C compiler for 32-bit OS development James Kuyper <jameskuyper@verizon.net> - 2011-12-12 18:16 -0500
            Re: Which lean C compiler for 32-bit OS development James Kuyper <jameskuyper@verizon.net> - 2011-12-11 09:03 -0500
              Re: Which lean C compiler for 32-bit OS development 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-11 08:57 -0800
              Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-12 12:11 -0800
                Re: Which lean C compiler for 32-bit OS development Keith Thompson <kst-u@mib.org> - 2011-12-12 14:25 -0800
                Re: Which lean C compiler for 32-bit OS development James Harris <james.harris.1@googlemail.com> - 2011-12-14 13:44 -0800
  Re: Which lean C compiler for 32-bit OS development "ankh" <star67@venus.gov> - 2011-11-12 22:42 -0600

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