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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- B A C K _ E N D --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2004 Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Atree; use Atree;
with Debug; use Debug;
with Elists; use Elists;
with Lib; use Lib;
with Osint; use Osint;
with Opt; use Opt;
with Osint; use Osint;
with Osint.C; use Osint.C;
with Namet; use Namet;
with Nlists; use Nlists;
with Stand; use Stand;
with Sinput; use Sinput;
with Stringt; use Stringt;
with Switch; use Switch;
with Switch.C; use Switch.C;
with System; use System;
with Types; use Types;
package body Back_End is
-------------------
-- Call_Back_End --
-------------------
procedure Call_Back_End (Mode : Back_End_Mode_Type) is
-- The File_Record type has a lot of components that are meaningless
-- to the back end, so a new record is created here to contain the
-- needed information for each file.
type Needed_File_Info_Type is record
File_Name : File_Name_Type;
First_Sloc : Source_Ptr;
Last_Sloc : Source_Ptr;
Num_Source_Lines : Nat;
end record;
File_Info_Array :
array (Main_Unit .. Last_Unit) of Needed_File_Info_Type;
procedure gigi (
gnat_root : Int;
max_gnat_node : Int;
number_name : Nat;
nodes_ptr : Address;
next_node_ptr : Address;
prev_node_ptr : Address;
elists_ptr : Address;
elmts_ptr : Address;
strings_ptr : Address;
string_chars_ptr : Address;
list_headers_ptr : Address;
number_units : Int;
file_info_ptr : Address;
gigi_standard_integer : Entity_Id;
gigi_standard_long_long_float : Entity_Id;
gigi_standard_exception_type : Entity_Id;
gigi_operating_mode : Back_End_Mode_Type);
pragma Import (C, gigi);
S : Source_File_Index;
begin
-- Skip call if in -gnatdH mode
if Debug_Flag_HH then
return;
end if;
for J in Main_Unit .. Last_Unit loop
S := Source_Index (J);
File_Info_Array (J).File_Name := File_Name (S);
File_Info_Array (J).First_Sloc := Source_Text (S)'First;
File_Info_Array (J).Last_Sloc := Source_Text (S)'Last;
File_Info_Array (J).Num_Source_Lines := Num_Source_Lines (S);
end loop;
gigi (
gnat_root => Int (Cunit (Main_Unit)),
max_gnat_node => Int (Last_Node_Id - First_Node_Id + 1),
number_name => Name_Entries_Count,
nodes_ptr => Nodes_Address,
next_node_ptr => Next_Node_Address,
prev_node_ptr => Prev_Node_Address,
elists_ptr => Elists_Address,
elmts_ptr => Elmts_Address,
strings_ptr => Strings_Address,
string_chars_ptr => String_Chars_Address,
list_headers_ptr => Lists_Address,
number_units => Num_Units,
file_info_ptr => File_Info_Array'Address,
gigi_standard_integer => Standard_Integer,
gigi_standard_long_long_float => Standard_Long_Long_Float,
gigi_standard_exception_type => Standard_Exception_Type,
gigi_operating_mode => Mode);
end Call_Back_End;
-----------------------------
-- Scan_Compiler_Arguments --
-----------------------------
procedure Scan_Compiler_Arguments is
Next_Arg : Pos := 1;
subtype Big_String is String (Positive);
type BSP is access Big_String;
type Arg_Array is array (Nat) of BSP;
type Arg_Array_Ptr is access Arg_Array;
-- Import flag_stack_check from toplev.c.
flag_stack_check : Int;
pragma Import (C, flag_stack_check); -- Import from toplev.c
save_argc : Nat;
pragma Import (C, save_argc); -- Import from toplev.c
save_argv : Arg_Array_Ptr;
pragma Import (C, save_argv); -- Import from toplev.c
Output_File_Name_Seen : Boolean := False;
-- Set to True after having scanned the file_name for
-- switch "-gnatO file_name"
-- Local functions
function Len_Arg (Arg : Pos) return Nat;
-- Determine length of argument number Arg on the original
-- command line from gnat1
procedure Scan_Back_End_Switches (Switch_Chars : String);
-- Procedure to scan out switches stored in Switch_Chars. The first
-- character is known to be a valid switch character, and there are no
-- blanks or other switch terminator characters in the string, so the
-- entire string should consist of valid switch characters, except that
-- an optional terminating NUL character is allowed.
--
-- Back end switches have already been checked and processed by GCC
-- in toplev.c, so no errors can occur and control will always return.
-- The switches must still be scanned to skip the arguments of the
-- "-o" or the (undocumented) "-dumpbase" switch, by incrementing
-- the Next_Arg variable. The "-dumpbase" switch is used to set the
-- basename for GCC dumpfiles.
-------------
-- Len_Arg --
-------------
function Len_Arg (Arg : Pos) return Nat is
begin
for J in 1 .. Nat'Last loop
if save_argv (Arg).all (Natural (J)) = ASCII.NUL then
return J - 1;
end if;
end loop;
raise Program_Error;
end Len_Arg;
----------------------------
-- Scan_Back_End_Switches --
----------------------------
procedure Scan_Back_End_Switches (Switch_Chars : String) is
First : constant Positive := Switch_Chars'First + 1;
Last : Natural := Switch_Chars'Last;
begin
if Last >= First
and then Switch_Chars (Last) = ASCII.NUL
then
Last := Last - 1;
end if;
-- For these switches, skip following argument and do not
-- store either the switch or the following argument
if Switch_Chars (First .. Last) = "o"
or else Switch_Chars (First .. Last) = "dumpbase"
or else Switch_Chars (First .. Last) = "-param"
then
Next_Arg := Next_Arg + 1;
-- Do not record -quiet switch
elsif Switch_Chars (First .. Last) = "quiet" then
null;
else
-- Store any other GCC switches
Store_Compilation_Switch (Switch_Chars);
end if;
end Scan_Back_End_Switches;
-- Start of processing for Scan_Compiler_Arguments
begin
-- Acquire stack checking mode directly from GCC
Opt.Stack_Checking_Enabled := (flag_stack_check /= 0);
-- Loop through command line arguments, storing them for later access
while Next_Arg < save_argc loop
Look_At_Arg : declare
Argv_Ptr : constant BSP := save_argv (Next_Arg);
Argv_Len : constant Nat := Len_Arg (Next_Arg);
Argv : constant String := Argv_Ptr (1 .. Natural (Argv_Len));
begin
-- If the previous switch has set the Output_File_Name_Present
-- flag (that is we have seen a -gnatO), then the next argument
-- is the name of the output object file.
if Output_File_Name_Present
and then not Output_File_Name_Seen
then
if Is_Switch (Argv) then
Fail ("Object file name missing after -gnatO");
else
Set_Output_Object_File_Name (Argv);
Output_File_Name_Seen := True;
end if;
elsif not Is_Switch (Argv) then -- must be a file name
Add_File (Argv);
-- We must recognize -nostdinc to suppress visibility on the
-- standard GNAT RTL sources. This is also a gcc switch.
elsif Argv (Argv'First + 1 .. Argv'Last) = "nostdinc" then
Opt.No_Stdinc := True;
Scan_Back_End_Switches (Argv);
-- We must recognize -nostdlib to suppress visibility on the
-- standard GNAT RTL objects.
elsif Argv (Argv'First + 1 .. Argv'Last) = "nostdlib" then
Opt.No_Stdlib := True;
elsif Is_Front_End_Switch (Argv) then
Scan_Front_End_Switches (Argv);
-- All non-front-end switches are back-end switches
else
Scan_Back_End_Switches (Argv);
end if;
end Look_At_Arg;
Next_Arg := Next_Arg + 1;
end loop;
end Scan_Compiler_Arguments;
end Back_End;
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