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|
(**************************************************************************)
(* Sail *)
(* *)
(* Copyright (c) 2013-2017 *)
(* Kathyrn Gray *)
(* Shaked Flur *)
(* Stephen Kell *)
(* Gabriel Kerneis *)
(* Robert Norton-Wright *)
(* Christopher Pulte *)
(* Peter Sewell *)
(* Alasdair Armstrong *)
(* *)
(* 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. *)
(* *)
(* SPDX-License-Identifier: BSD-2-Clause *)
(**************************************************************************)
(*module Big_int = Nat_big_num*)
let opt_elf_threads = ref 1
let opt_elf_entry = ref Nat_big_num.zero
let opt_elf_tohost = ref Nat_big_num.zero
type word8 = int
let escape_char c = if int_of_char c <= 31 then '.' else if int_of_char c >= 127 then '.' else c
let hex_line bs =
let hex_char i c = (if i mod 2 == 0 && i <> 0 then " " else "") ^ Printf.sprintf "%02x" (int_of_char c) in
String.concat "" (List.mapi hex_char bs)
^ " "
^ String.concat "" (List.map (fun c -> Printf.sprintf "%c" (escape_char c)) bs)
let rec break n = function [] -> [] | _ :: _ as xs -> [Lem_list.take n xs] @ break n (Lem_list.drop n xs)
let print_segment seg =
let bs = seg.Elf_interpreted_segment.elf64_segment_body in
prerr_endline "0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789abcdef";
List.iter (fun bs -> prerr_endline (hex_line bs)) (break 16 (Byte_sequence.char_list_of_byte_sequence bs))
let read name =
let info = Sail_interface.populate_and_obtain_global_symbol_init_info name in
prerr_endline "Elf read:";
let elf_file, elf_epi, symbol_map =
begin
match info with
| Error.Fail s -> failwith (Printf.sprintf "populate_and_obtain_global_symbol_init_info: %s" s)
| Error.Success
( (elf_file : Elf_file.elf_file),
(elf_epi : Sail_interface.executable_process_image),
(symbol_map : Elf_file.global_symbol_init_info)
) ->
(* XXX disabled because it crashes if entry_point overflows an ocaml int :-(
prerr_endline (Sail_interface.string_of_executable_process_image elf_epi);*)
(elf_file, elf_epi, symbol_map)
end
in
prerr_endline "\nElf segments:";
let segments, e_entry, e_machine =
begin
match (elf_epi, elf_file) with
| Sail_interface.ELF_Class_32 _, _ -> failwith "cannot handle ELF_Class_32"
| _, Elf_file.ELF_File_32 _ -> failwith "cannot handle ELF_File_32"
| Sail_interface.ELF_Class_64 (segments, e_entry, e_machine), Elf_file.ELF_File_64 f1 ->
(* remove all the auto generated segments (they contain only 0s) *)
let segments =
Lem_list.mapMaybe (fun (seg, prov) -> if prov = Elf_file.FromELF then Some seg else None) segments
in
(segments, e_entry, e_machine)
end
in
(segments, e_entry, symbol_map)
(*let write_sail_lib paddr i byte =
Sail_lib.wram (Nat_big_num.add paddr (Nat_big_num.of_int i)) byte*)
let write_file chan paddr i byte =
output_string chan (Nat_big_num.to_string (Nat_big_num.add paddr (Nat_big_num.of_int i)) ^ "\n");
output_string chan (string_of_int byte ^ "\n")
let load_elf name =
let segments, e_entry, symbol_map = read name in
opt_elf_entry := e_entry;
if List.mem_assoc "tohost" symbol_map then (
let _, _, tohost_addr, _, _ = List.assoc "tohost" symbol_map in
opt_elf_tohost := tohost_addr
);
(*List.iter (load_segment ~writer:writer) segments*)
segments
(* The sail model can access this by externing a unit -> Big_int.t function
as Elf_loader.elf_entry. *)
let elf_entry () = Big_int.big_int_of_string (Nat_big_num.to_string !opt_elf_entry)
(* Used by RISCV sail model test harness for exiting test *)
let elf_tohost () = Big_int.big_int_of_string (Nat_big_num.to_string !opt_elf_tohost)
|
