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(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Generation of bytecode for .cmo files *)
open Lambda
open Instruct
(* Relocation information *)
type reloc_info =
Reloc_literal of structured_constant (* structured constant *)
| Reloc_getglobal of Ident.t (* reference to a global *)
| Reloc_setglobal of Ident.t (* definition of a global *)
| Reloc_primitive of string (* C primitive number *)
(* Descriptor for compilation units *)
type compilation_unit =
{ cu_name: string; (* Name of compilation unit *)
mutable cu_pos: int; (* Absolute position in file *)
cu_codesize: int; (* Size of code block *)
cu_reloc: (reloc_info * int) list; (* Relocation information *)
cu_imports: (string * Digest.t) list; (* Names and CRC of intfs imported *)
cu_primitives: string list; (* Primitives declared inside *)
mutable cu_force_link: bool; (* Must be linked even if unref'ed *)
mutable cu_debug: int; (* Position of debugging info, or 0 *)
cu_debugsize: int } (* Length of debugging info *)
(* Format of a .cmo file:
magic number (Config.cmo_magic_number)
absolute offset of compilation unit descriptor
block of relocatable bytecode
compilation unit descriptor *)
(* Descriptor for libraries *)
type library =
{ lib_units: compilation_unit list; (* List of compilation units *)
lib_custom: bool; (* Requires custom mode linking? *)
lib_ccobjs: string list; (* C object files needed for -custom *)
lib_ccopts: string list; (* Extra opts to C compiler *)
lib_dllibs: string list } (* DLLs needed *)
(* Format of a .cma file:
magic number (Config.cma_magic_number)
absolute offset of library descriptor
object code for first library member
...
object code for last library member
library descriptor *)
val to_file: out_channel -> string -> instruction list -> unit
(* Arguments:
channel on output file
name of compilation unit implemented
list of instructions to emit *)
val to_memory: instruction list -> instruction list ->
string * int * (reloc_info * int) list
(* Arguments:
initialization code (terminated by STOP)
function code
Results:
block of relocatable bytecode
size of this block
relocation information *)
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