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(* code-obj.sig
*
* COPYRIGHT (c) 1998 Bell Labs, Lucent Technologies.
*
* An interface for manipulating code objects.
*)
signature CODE_OBJ =
sig
type code_object
type csegments = {
c0 : code_object,
cn : code_object list,
data : Word8Vector.vector
}
type executable = Unsafe.Object.object -> Unsafe.Object.object
exception FormatError
(* raised by input when there are insufficient bytes *)
val alloc : int -> code_object
(* Allocate an unintialized code object of the given number of bytes.
*)
val input : (BinIO.instream * int) -> code_object
(* Allocate a code object of the given size and initialize it
* from the input stream.
*)
val output : (BinIO.outstream * code_object) -> unit
(* Output a code object to the given output stream *)
val bytes : code_object -> Word8Array.array
(* View the code object as an updatable array of bytes. *)
val set_entrypoint : code_object * int -> unit
(* Set the offset of the entrypoint of the code object (default: 0). *)
val exec : code_object -> executable
(* View the code object as an executable. This has the side-effect
* of flushing the instruction cache.
*)
val size : code_object -> int
(* return the size of the code object *)
val entrypoint : code_object -> int
(* return the offset of the entry point of the code object *)
val mkLiterals : Word8Vector.vector -> Unsafe.Object.object
(* use the run-time system interpreter to generate a literals
* vector from a literal bytecode program.
*)
end;
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