open Cheri_export;;



(**************************************************************************)
(*     Sail                                                               *)
(*                                                                        *)
(*  Copyright (c) 2013-2017                                               *)
(*    Kathyrn Gray                                                        *)
(*    Shaked Flur                                                         *)
(*    Stephen Kell                                                        *)
(*    Gabriel Kerneis                                                     *)
(*    Robert Norton-Wright                                                *)
(*    Christopher Pulte                                                   *)
(*    Peter Sewell                                                        *)
(*    Alasdair Armstrong                                                  *)
(*    Brian Campbell                                                      *)
(*    Thomas Bauereiss                                                    *)
(*    Anthony Fox                                                         *)
(*    Jon French                                                          *)
(*    Dominic Mulligan                                                    *)
(*    Stephen Kell                                                        *)
(*    Mark Wassell                                                        *)
(*                                                                        *)
(*  All rights reserved.                                                  *)
(*                                                                        *)
(*  This software was developed by the University of Cambridge Computer   *)
(*  Laboratory as part of the Rigorous Engineering of Mainstream Systems  *)
(*  (REMS) project, funded by EPSRC grant EP/K008528/1.                   *)
(*                                                                        *)
(*  Redistribution and use in source and binary forms, with or without    *)
(*  modification, are permitted provided that the following conditions    *)
(*  are met:                                                              *)
(*  1. Redistributions of source code must retain the above copyright     *)
(*     notice, this list of conditions and the following disclaimer.      *)
(*  2. Redistributions in binary form must reproduce the above copyright  *)
(*     notice, this list of conditions and the following disclaimer in    *)
(*     the documentation and/or other materials provided with the         *)
(*     distribution.                                                      *)
(*                                                                        *)
(*  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''    *)
(*  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED     *)
(*  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A       *)
(*  PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR   *)
(*  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,          *)
(*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      *)
(*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF      *)
(*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND   *)
(*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,    *)
(*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT    *)
(*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF    *)
(*  SUCH DAMAGE.                                                          *)
(**************************************************************************)

open Elf_loader;;

let opt_file_arguments = ref ([] : string list)

let options = Arg.align []

let usage_msg = "Sail OCaml RTS options:"

let () =
  Arg.parse options (fun s -> opt_file_arguments := !opt_file_arguments @ [s]) usage_msg

let (>>) = Sail2_state_monad.bindS
(*let liftS = Sail2_state_lifting.liftState (Cheri_types.get_regval, Cheri_types.set_regval)*)

let load_elf_segment seg =
  let open Elf_interpreted_segment in
  let bs = seg.elf64_segment_body in
  let paddr = Big_int.big_int_of_string (Nat_big_num.to_string seg.elf64_segment_paddr) in
  let base = Big_int.big_int_of_string (Nat_big_num.to_string seg.elf64_segment_base) in
  let offset = Big_int.big_int_of_string (Nat_big_num.to_string seg.elf64_segment_offset) in
  let writer i byte = Cheri_code.write_char_mem (Arith.plus_int (Arith.Int_of_integer paddr) i) byte in
  prerr_endline "\nLoading Segment";
  prerr_endline ("Segment offset: " ^ Big_int.string_of_big_int offset);
  prerr_endline ("Segment base address: " ^ Big_int.string_of_big_int base);
  prerr_endline ("Segment physical address: " ^ Big_int.string_of_big_int paddr);
  print_segment seg;
  Sail2_state.iteriS writer (Byte_sequence.char_list_of_byte_sequence bs)

let _ =
  Random.self_init ();
  let elf_segments = match !opt_file_arguments with
    | f :: _ -> load_elf f
    | _ -> []
  in
  (* State_monad.prerr_results *)
    (Cheri_code.initial_state |>
    (Sail2_state.iterS load_elf_segment elf_segments >> (fun _ ->
    (Cheri_code.mainS ()))));