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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- B A C K _ E N D -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2011, 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 3, 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 COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Call the back end with all the information needed. Also contains other -- back-end specific interfaces required by the front end. with Einfo; use Einfo; package Back_End is type Back_End_Mode_Type is ( Generate_Object, -- Full back end operation with object file generation Declarations_Only, -- Partial back end operation with no object file generation. In this -- mode the only useful action performed by gigi is to process all -- declarations issuing any error messages (in particular those to -- do with rep clauses), and to back annotate representation info. Skip); -- Back end call is skipped (syntax only, or errors found) pragma Convention (C, Back_End_Mode_Type); for Back_End_Mode_Type use (0, 1, 2); type C_String is array (0 .. 255) of aliased Character; pragma Convention (C, C_String); type Register_Type_Proc is access procedure (C_Name : C_String; -- Nul-terminated string with name of type Digs : Natural; -- Nr or digits for floating point, 0 otherwise Complex : Boolean; -- True iff type has real and imaginary parts Count : Natural; -- Number of elements in vector, 0 otherwise Float_Rep : Float_Rep_Kind; -- Representation used for fpt type Size : Positive; -- Size of representation in bits Alignment : Natural); -- Required alignment in bits pragma Convention (C, Register_Type_Proc); -- Call back procedure for Register_Back_End_Types. This is to be used by -- Create_Standard to create predefined types for all types supported by -- the back end. procedure Register_Back_End_Types (Call_Back : Register_Type_Proc); -- Calls the Call_Back function with information for each supported type. procedure Call_Back_End (Mode : Back_End_Mode_Type); -- Call back end, i.e. make call to driver traversing the tree and -- outputting code. This call is made with all tables locked. -- The back end is responsible for unlocking any tables it may need -- to change, and locking them again before returning. procedure Scan_Compiler_Arguments; -- Acquires command-line parameters passed to the compiler and processes -- them. Calls Scan_Front_End_Switches for any front-end switches found. -- -- The processing of arguments is private to the back end, since the way -- of acquiring the arguments as well as the set of allowable back end -- switches is different depending on the particular back end being used. -- -- Any processed switches that influence the result of a compilation must -- be added to the Compilation_Arguments table. procedure Gen_Or_Update_Object_File; -- Is used to generate the object file (if generated directly by gnat1), or -- update it if it has already been generated by the call to Call_Back_End, -- so that its timestamp is updated by the call. -- -- This is a no-op with the gcc back-end (the object file is generated by -- the assembler afterwards), but is needed for back-ends that directly -- generate the final object file (such as the .NET backend) so that the -- object file's timestamp is correct when compared with the corresponding -- ali file by gnatmake. end Back_End;
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