| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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 |
| Precision : Positive; -- Precision of representation in bits |
| 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; |
