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