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Bytecode object files structure
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Date: 2006-11-13 (09:16)
From: Yann_Régis-Gianas <yann.regisgianas@g...>
Subject: Re: [Caml-list] Bytecode object files structure

The file tools/dumpobj.ml in the O'Caml tree may be used to parse the
object file. This should be a first step to understand the bytecode
file format.

Hope this help,

Yann Régis-Gianas

On 11/12/06, Pierre-Etienne Meunier <pierreetienne.meunier@ens-lyon.fr> wrote:
> Hi,
> I'm trying to decrypt .cmo files produced by simple programs, such as
> 1+1;;
> or
> print_string "string";;
> or
> List.length [1;2;3;4;5];;
> According to the source of Ocaml, there's something called the
> "cmo_magic_number", systematically written at the beginning of all .cmo
> files. Does it have a real function for executing the programs, or is it just
> a way to make sure the file contains ocaml bytecode ?
> Then, there's the address of what seems to be the last bytecode instruction.
> Then, the bytecode instructions, as documented in opcodes.ml.
> After that, I can't understand anything : there vaguely seems to be some
> information related to linking or so... What is the precise structure of this
> part ? Is there some kind of a bytecode assembler ?
> Thanks,
> P.E. Meunier (pierreetienne.meunier@ens-lyon.fr)
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