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|
(* *********************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Xavier Leroy, INRIA Paris-Rocquencourt *)
(* *)
(* Copyright Institut National de Recherche en Informatique et en *)
(* Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU General Public License as published by *)
(* the Free Software Foundation, either version 2 of the License, or *)
(* (at your option) any later version. This file is also distributed *)
(* under the terms of the INRIA Non-Commercial License Agreement. *)
(* *)
(* *********************************************************************)
open Printf
open Commandline
open Clflags
open Driveraux
open Frontend
(* Location of the compatibility library *)
let stdlib_path = ref Configuration.stdlib_path
(* From CompCert C AST to Clight *)
let compile_c_ast sourcename csyntax ofile =
let clight =
match SimplExpr.transl_program csyntax with
| Errors.OK p ->
begin match SimplLocals.transf_program p with
| Errors.OK p' -> p'
| Errors.Error msg ->
print_error stderr msg;
exit 2
end
| Errors.Error msg ->
print_error stderr msg;
exit 2 in
(* Dump Clight in C syntax if requested *)
if !option_dclight then begin
let ofile = Filename.chop_suffix sourcename ".c" ^ ".light.c" in
let oc = open_out ofile in
PrintClight.print_program (Format.formatter_of_out_channel oc) clight;
close_out oc
end;
(* Print Clight in Coq syntax *)
let oc = open_out ofile in
ExportClight.print_program (Format.formatter_of_out_channel oc) clight;
close_out oc
(* From C source to Clight *)
let compile_c_file sourcename ifile ofile =
compile_c_ast sourcename (parse_c_file sourcename ifile) ofile
(* Processing of a .c file *)
let process_c_file sourcename =
let prefixname = Filename.chop_suffix sourcename ".c" in
if !option_E then begin
preprocess sourcename "-"
end else begin
let preproname = Filename.temp_file "compcert" ".i" in
preprocess sourcename preproname;
compile_c_file sourcename preproname (prefixname ^ ".v")
end
let version_string =
if Version.buildnr <> "" && Version.tag <> "" then
sprintf "The CompCert Clight generator, %s, Build: %s, Tag: %s\n" Version.version Version.buildnr Version.tag
else
"The CompCert Clight generator, version "^ Version.version ^ "\n"
let usage_string =
version_string ^
"Usage: clightgen [options] <source files>\n\
Recognized source files:\n\
\ .c C source file\n\
Processing options:\n\
\ -E Preprocess only, send result to standard output\n"^
prepro_help ^
"Language support options (use -fno-<opt> to turn off -f<opt>) :\n\
\ -fbitfields Emulate bit fields in structs [off]\n\
\ -flongdouble Treat 'long double' as 'double' [off]\n\
\ -fstruct-passing Support passing structs and unions by value as function\n\
\ results or function arguments [off]\n\
\ -fstruct-return Like -fstruct-passing (deprecated)\n\
\ -fvararg-calls Emulate calls to variable-argument functions [on]\n\
\ -fpacked-structs Emulate packed structs [off]\n\
\ -fall Activate all language support options above\n\
\ -fnone Turn off all language support options above\n\
Tracing options:\n\
\ -dparse Save C file after parsing and elaboration in <file>.parsed.c\n\
\ -dc Save generated Compcert C in <file>.compcert.c\n\
\ -dclight Save generated Clight in <file>.light.c\n\
General options:\n\
\ -v Print external commands before invoking them\n"
let print_usage_and_exit () =
printf "%s" usage_string; exit 0
let print_version_and_exit () =
printf "%s" version_string; exit 0
let language_support_options = [
option_fbitfields; option_flongdouble;
option_fstruct_passing; option_fvararg_calls; option_funprototyped;
option_fpacked_structs; option_finline_asm
]
let set_all opts () = List.iter (fun r -> r := true) opts
let unset_all opts () = List.iter (fun r -> r := false) opts
let cmdline_actions =
let f_opt name ref =
[Exact("-f" ^ name), Set ref; Exact("-fno-" ^ name), Unset ref] in
[
(* Getting help *)
Exact "-help", Unit print_usage_and_exit;
Exact "--help", Unit print_usage_and_exit;
(* Getting version info *)
Exact "-version", Unit print_version_and_exit;
Exact "--version", Unit print_version_and_exit;
(* Processing options *)
Exact "-E", Set option_E;]
(* Preprocessing options *)
@ prepro_actions @
(* Language support options -- more below *)
[Exact "-fall", Unit (set_all language_support_options);
Exact "-fnone", Unit (unset_all language_support_options);
(* Tracing options *)
Exact "-dparse", Set option_dparse;
Exact "-dc", Set option_dcmedium;
Exact "-dclight", Set option_dclight;
(* General options *)
Exact "-v", Set option_v;
Exact "-stdlib", String(fun s -> stdlib_path := s);
]
(* -f options: come in -f and -fno- variants *)
(* Language support options *)
@ f_opt "longdouble" option_flongdouble
@ f_opt "struct-return" option_fstruct_passing
@ f_opt "struct-passing" option_fstruct_passing
@ f_opt "bitfields" option_fbitfields
@ f_opt "vararg-calls" option_fvararg_calls
@ f_opt "unprototyped" option_funprototyped
@ f_opt "packed-structs" option_fpacked_structs
@ f_opt "inline-asm" option_finline_asm
@ [
(* Catch options that are not handled *)
Prefix "-", Self (fun s ->
eprintf "Unknown option `%s'\n" s; exit 2);
(* File arguments *)
Suffix ".c", Self (fun s -> process_c_file s);
]
let _ =
Gc.set { (Gc.get()) with
Gc.minor_heap_size = 524288; (* 512k *)
Gc.major_heap_increment = 4194304 (* 4M *)
};
Printexc.record_backtrace true;
Machine.config :=
begin match Configuration.arch with
| "powerpc" -> Machine.ppc_32_bigendian
| "arm" -> if Configuration.is_big_endian
then Machine.arm_bigendian
else Machine.arm_littleendian
| "ia32" -> Machine.x86_32
| _ -> assert false
end;
Builtins.set C2C.builtins;
CPragmas.initialize();
parse_cmdline cmdline_actions
|
