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coreboot-kgpe-d16/src/lib/gnat/system.ads
Nico Huber 4a027e6e95 lib/gnat: Drop Restriction No_Exception_Propagation 
It turns out that even with the `-gnatp` switch to suppress runtime
checks, the compiler is still allowed to generate them (it only doesn't
have to). If we can't control generation of checks, we also can't
make assumptions about propagation of their exceptions.

The compiler warning that led to this change seems spurious, though
(the check might be generated, but is dropped later). So we might
revert this decision if the compiler can be fixed.

Change-Id: I7470d74b1f96f90d0d15b24dfd636d5f1c778d46
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/26350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-05-19 20:39:09 +00:00

175 lines
8.4 KiB
Ada
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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M --
-- --
-- S p e c --
-- (LSH Version) --
-- --
-- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
pragma Restrictions (No_Exception_Registration);
pragma Restrictions (No_Implicit_Dynamic_Code);
pragma Restrictions (No_Finalization);
pragma Restrictions (No_Tasking);
package System is
pragma Pure;
-- Note that we take advantage of the implementation permission to make
-- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
-- 2005, this is Pure in any case (AI-362).
pragma No_Elaboration_Code_All;
-- Allow the use of that restriction in units that WITH this unit
type Name is (SYSTEM_NAME_GNAT);
System_Name : constant Name := SYSTEM_NAME_GNAT;
-- System-Dependent Named Numbers
Min_Int : constant := Long_Long_Integer'First;
Max_Int : constant := Long_Long_Integer'Last;
Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size;
Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
Max_Base_Digits : constant := Long_Long_Float'Digits;
Max_Digits : constant := Long_Long_Float'Digits;
Max_Mantissa : constant := 63;
Fine_Delta : constant := 2.0 ** (-Max_Mantissa);
Tick : constant := 0.01;
-- Storage-related Declarations
type Address is private;
-- Note that we do NOT add pragma Preelaborable_Initialization in this
-- version of System, since it is used for the compiler only, and typical
-- earlier bootstrap compilers don't support this pragma. We don't need
-- it in this context, so there is no problem in omitting it.
Null_Address : constant Address;
Storage_Unit : constant := Standard'Storage_Unit;
Word_Size : constant := Standard'Word_Size;
Memory_Size : constant := 2 ** Standard'Address_Size;
-- Address comparison
function "<" (Left, Right : Address) return Boolean;
function "<=" (Left, Right : Address) return Boolean;
function ">" (Left, Right : Address) return Boolean;
function ">=" (Left, Right : Address) return Boolean;
function "=" (Left, Right : Address) return Boolean;
pragma Import (Intrinsic, "<");
pragma Import (Intrinsic, "<=");
pragma Import (Intrinsic, ">");
pragma Import (Intrinsic, ">=");
pragma Import (Intrinsic, "=");
-- Other System-Dependent Declarations
type Bit_Order is (High_Order_First, Low_Order_First);
Default_Bit_Order : constant Bit_Order :=
Bit_Order'Val (Standard'Default_Bit_Order);
pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
-- Priority-related Declarations (RM D.1)
Max_Priority : constant Positive := 30;
Max_Interrupt_Priority : constant Positive := 31;
subtype Any_Priority is Integer range 0 .. 31;
subtype Priority is Any_Priority range 0 .. 30;
subtype Interrupt_Priority is Any_Priority range 31 .. 31;
Default_Priority : constant Priority := 15;
private
Run_Time_Name : constant String := "coreboot Zero Footprint Run Time";
type Address is mod Memory_Size;
Null_Address : constant Address := 0;
--------------------------------------
-- System Implementation Parameters --
--------------------------------------
-- These parameters provide information about the target that is used by
-- the compiler. They are in the private part of System, where they can be
-- accessed using the special circuitry in the Targparm unit whose source
-- should be consulted for more detailed descriptions of the individual
-- switch values.
-- This version of system.ads is used only for building the compiler.
-- We really ought to use the proper target system (i.e. the one that
-- corresponds to the host for the compiler), but that causes as yet
-- unsolved makefile problems. For the most part the setting of these
-- parameters is not too critical for the compiler version (e.g. we
-- do not use floating-point anyway in the compiler).
AAMP : constant Boolean := False;
Backend_Divide_Checks : constant Boolean := False;
Backend_Overflow_Checks : constant Boolean := True;
Command_Line_Args : constant Boolean := False;
Configurable_Run_Time : constant Boolean := True;
Denorm : constant Boolean := True;
Duration_32_Bits : constant Boolean := False;
Exit_Status_Supported : constant Boolean := False;
Fractional_Fixed_Ops : constant Boolean := False;
Frontend_Layout : constant Boolean := False;
Machine_Overflows : constant Boolean := False;
Machine_Rounds : constant Boolean := True;
Preallocated_Stacks : constant Boolean := False;
Signed_Zeros : constant Boolean := True;
Stack_Check_Default : constant Boolean := False;
Stack_Check_Probes : constant Boolean := False;
Stack_Check_Limits : constant Boolean := False;
Support_Aggregates : constant Boolean := True;
Support_Composite_Assign : constant Boolean := True;
Support_Composite_Compare : constant Boolean := True;
Support_Long_Shifts : constant Boolean := True;
Always_Compatible_Rep : constant Boolean := True;
Suppress_Standard_Library : constant Boolean := True;
Use_Ada_Main_Program_Name : constant Boolean := False;
ZCX_By_Default : constant Boolean := False;
-- Obsolete entries, to be removed eventually (bootstrap issues)
Front_End_ZCX_Support : constant Boolean := False;
High_Integrity_Mode : constant Boolean := False;
Long_Shifts_Inlined : constant Boolean := True;
Functions_Return_By_DSP : constant Boolean := False;
Support_64_Bit_Divides : constant Boolean := True;
GCC_ZCX_Support : constant Boolean := False;
end System;
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