From: Stephane Glondu <Stephane.Glondu@crans.org>
To: Jonathan Roewen <jonathan.roewen@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] ocamlopt, and generated ASM
Date: Tue, 26 Jul 2005 18:03:09 -0700 [thread overview]
Message-ID: <42E6DD4D.2050101@crans.org> (raw)
In-Reply-To: <42E6DC6E.60109@crans.org>
BTW, I am assuming you are working on i386 architecture.
Stephane Glondu wrote:
> Jonathan Roewen wrote:
>
>>I'm having some esoteric problems with my operating system project,
>>and it randomly halting (i.e.: the hlt instruction issued with
>>interrupts off). I've tried grepping the ocaml sources, but to no
>>avail.
>>
>>Could someone who has some in-depth knowledge of the code gneretor for
>>ocamlopt explain where these hlt instructions come from, and more
>>importantly, where abouts they are generated?
>
>
> Where are these hlt exactly? In the asm file generated from the .ml
> file? In the startup code? In the runtime library? The string "hlt"
> doesn't seem to appear in ocaml (at least in version 3.08.3) source
> code, so it seems very weird (even though possible) that this
> instruction is generated by the compiler... Moreover, you usually need
> to be in privilege level 0 (in kernel mode) to execute that
> instruction, and there are not many ocamlopt-generated programmes run
> in kernel mode... Maybe it is at a place which is not expected to be
> reached in "normal" programme execution (such as after a call to
> exit()). Are you sure this hlt comes from the ocamlopt generated code?
>
>
>>Perhaps ocaml 3.08.2 has some interesting bugs I'm not aware of?
>
>
> Actually, I'm working with version 3.08.3. But still, I would be
> interested if you found out the problem.
next prev parent reply other threads:[~2005-07-27 1:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-26 22:41 Jonathan Roewen
2005-07-27 0:59 ` Stephane Glondu
2005-07-27 1:03 ` Stephane Glondu [this message]
2005-07-27 1:28 ` Jonathan Roewen
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