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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- B I N D G E N --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2009, 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. --
-- --
------------------------------------------------------------------------------
with ALI; use ALI;
with Binde; use Binde;
with Casing; use Casing;
with Fname; use Fname;
with Gnatvsn; use Gnatvsn;
with Hostparm;
with Namet; use Namet;
with Opt; use Opt;
with Osint; use Osint;
with Osint.B; use Osint.B;
with Output; use Output;
with Rident; use Rident;
with Table; use Table;
with Targparm; use Targparm;
with Types; use Types;
with System.OS_Lib; use System.OS_Lib;
with System.WCh_Con; use System.WCh_Con;
with GNAT.Heap_Sort_A; use GNAT.Heap_Sort_A;
package body Bindgen is
Statement_Buffer : String (1 .. 1000);
-- Buffer used for constructing output statements
Last : Natural := 0;
-- Last location in Statement_Buffer currently set
With_DECGNAT : Boolean := False;
-- Flag which indicates whether the program uses the DECGNAT library
-- (presence of the unit DEC).
With_GNARL : Boolean := False;
-- Flag which indicates whether the program uses the GNARL library
-- (presence of the unit System.OS_Interface)
Num_Elab_Calls : Nat := 0;
-- Number of generated calls to elaboration routines
System_Restrictions_Used : Boolean;
-- Flag indicating whether the unit System.Restrictions is in the closure
-- of the partition. This is set by Check_System_Restrictions_Used, and
-- is used to determine whether or not to initialize the restrictions
-- information in the body of the binder generated file (we do not want
-- to do this unconditionally, since it drags in the System.Restrictions
-- unit unconditionally, which is unpleasand, especially for ZFP etc.)
----------------------------------
-- Interface_State Pragma Table --
----------------------------------
-- This table assembles the interface state pragma information from
-- all the units in the partition. Note that Bcheck has already checked
-- that the information is consistent across units. The entries
-- in this table are n/u/r/s for not set/user/runtime/system.
package IS_Pragma_Settings is new Table.Table (
Table_Component_Type => Character,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 100,
Table_Increment => 200,
Table_Name => "IS_Pragma_Settings");
-- This table assembles the Priority_Specific_Dispatching pragma
-- information from all the units in the partition. Note that Bcheck has
-- already checked that the information is consistent across units.
-- The entries in this table are the upper case first character of the
-- policy name, e.g. 'F' for FIFO_Within_Priorities.
package PSD_Pragma_Settings is new Table.Table (
Table_Component_Type => Character,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 100,
Table_Increment => 200,
Table_Name => "PSD_Pragma_Settings");
----------------------
-- Run-Time Globals --
----------------------
-- This section documents the global variables that set from the
-- generated binder file.
-- Main_Priority : Integer;
-- Time_Slice_Value : Integer;
-- WC_Encoding : Character;
-- Locking_Policy : Character;
-- Queuing_Policy : Character;
-- Task_Dispatching_Policy : Character;
-- Priority_Specific_Dispatching : System.Address;
-- Num_Specific_Dispatching : Integer;
-- Restrictions : System.Address;
-- Interrupt_States : System.Address;
-- Num_Interrupt_States : Integer;
-- Unreserve_All_Interrupts : Integer;
-- Exception_Tracebacks : Integer;
-- Zero_Cost_Exceptions : Integer;
-- Detect_Blocking : Integer;
-- Default_Stack_Size : Integer;
-- Leap_Seconds_Support : Integer;
-- Main_Priority is the priority value set by pragma Priority in the main
-- program. If no such pragma is present, the value is -1.
-- Time_Slice_Value is the time slice value set by pragma Time_Slice in the
-- main program, or by the use of a -Tnnn parameter for the binder (if both
-- are present, the binder value overrides). The value is in milliseconds.
-- A value of zero indicates that time slicing should be suppressed. If no
-- pragma is present, and no -T switch was used, the value is -1.
-- WC_Encoding shows the wide character encoding method used for the main
-- program. This is one of the encoding letters defined in
-- System.WCh_Con.WC_Encoding_Letters.
-- Locking_Policy is a space if no locking policy was specified for the
-- partition. If a locking policy was specified, the value is the upper
-- case first character of the locking policy name, for example, 'C' for
-- Ceiling_Locking.
-- Queuing_Policy is a space if no queuing policy was specified for the
-- partition. If a queuing policy was specified, the value is the upper
-- case first character of the queuing policy name for example, 'F' for
-- FIFO_Queuing.
-- Task_Dispatching_Policy is a space if no task dispatching policy was
-- specified for the partition. If a task dispatching policy was specified,
-- the value is the upper case first character of the policy name, e.g. 'F'
-- for FIFO_Within_Priorities.
-- Priority_Specific_Dispatching is the address of a string used to store
-- the task dispatching policy specified for the different priorities in
-- the partition. The length of this string is determined by the last
-- priority for which such a pragma applies (the string will be a null
-- string if no specific dispatching policies were used). If pragma were
-- present, the entries apply to the priorities in sequence from the first
-- priority. The value stored is the upper case first character of the
-- policy name, or 'F' (for FIFO_Within_Priorities) as the default value
-- for those priority ranges not specified.
-- Num_Specific_Dispatching is the length of the
-- Priority_Specific_Dispatching string. It will be set to zero if no
-- Priority_Specific_Dispatching pragmas are present.
-- Restrictions is the address of a null-terminated string specifying the
-- restrictions information for the partition. The format is identical to
-- that of the parameter string found on R lines in ali files (see Lib.Writ
-- spec in lib-writ.ads for full details). The difference is that in this
-- context the values are the cumulative ones for the entire partition.
-- Interrupt_States is the address of a string used to specify the
-- cumulative results of Interrupt_State pragmas used in the partition.
-- The length of this string is determined by the last interrupt for which
-- such a pragma is given (the string will be a null string if no pragmas
-- were used). If pragma were present the entries apply to the interrupts
-- in sequence from the first interrupt, and are set to one of four
-- possible settings: 'n' for not specified, 'u' for user, 'r' for run
-- time, 's' for system, see description of Interrupt_State pragma for
-- further details.
-- Num_Interrupt_States is the length of the Interrupt_States string. It
-- will be set to zero if no Interrupt_State pragmas are present.
-- Unreserve_All_Interrupts is set to one if at least one unit in the
-- partition had a pragma Unreserve_All_Interrupts, and zero otherwise.
-- Exception_Tracebacks is set to one if the -E parameter was present
-- in the bind and to zero otherwise. Note that on some targets exception
-- tracebacks are provided by default, so a value of zero for this
-- parameter does not necessarily mean no trace backs are available.
-- Zero_Cost_Exceptions is set to one if zero cost exceptions are used for
-- this partition, and to zero if longjmp/setjmp exceptions are used.
-- Detect_Blocking indicates whether pragma Detect_Blocking is active or
-- not. A value of zero indicates that the pragma is not present, while a
-- value of 1 signals its presence in the partition.
-- Default_Stack_Size is the default stack size used when creating an Ada
-- task with no explicit Storage_Size clause.
-- Leap_Seconds_Support denotes whether leap seconds have been enabled or
-- disabled. A value of zero indicates that leap seconds are turned "off",
-- while a value of one signifies "on" status.
-----------------------
-- Local Subprograms --
-----------------------
procedure WBI (Info : String) renames Osint.B.Write_Binder_Info;
-- Convenient shorthand used throughout
procedure Check_System_Restrictions_Used;
-- Sets flag System_Restrictions_Used (Set to True if and only if the unit
-- System.Restrictions is present in the partition, otherwise False).
procedure Gen_Adainit_Ada;
-- Generates the Adainit procedure (Ada code case)
procedure Gen_Adainit_C;
-- Generates the Adainit procedure (C code case)
procedure Gen_Adafinal_Ada;
-- Generate the Adafinal procedure (Ada code case)
procedure Gen_Adafinal_C;
-- Generate the Adafinal procedure (C code case)
procedure Gen_Elab_Calls_Ada;
-- Generate sequence of elaboration calls (Ada code case)
procedure Gen_Elab_Calls_C;
-- Generate sequence of elaboration calls (C code case)
procedure Gen_Elab_Order_Ada;
-- Generate comments showing elaboration order chosen (Ada case)
procedure Gen_Elab_Order_C;
-- Generate comments showing elaboration order chosen (C case)
procedure Gen_Elab_Defs_C;
-- Generate sequence of definitions for elaboration routines (C code case)
procedure Gen_Main_Ada;
-- Generate procedure main (Ada code case)
procedure Gen_Main_C;
-- Generate main() procedure (C code case)
procedure Gen_Object_Files_Options;
-- Output comments containing a list of the full names of the object
-- files to be linked and the list of linker options supplied by
-- Linker_Options pragmas in the source. (C and Ada code case)
procedure Gen_Output_File_Ada (Filename : String);
-- Generate output file (Ada code case)
procedure Gen_Output_File_C (Filename : String);
-- Generate output file (C code case)
procedure Gen_Restrictions_Ada;
-- Generate initialization of restrictions variable (Ada code case)
procedure Gen_Restrictions_C;
-- Generate initialization of restrictions variable (C code case)
procedure Gen_Versions_Ada;
-- Output series of definitions for unit versions (Ada code case)
procedure Gen_Versions_C;
-- Output series of definitions for unit versions (C code case)
function Get_Ada_Main_Name return String;
-- This function is used in the Ada main output case to compute a usable
-- name for the generated main program. The normal main program name is
-- Ada_Main, but this won't work if the user has a unit with this name.
-- This function tries Ada_Main first, and if there is such a clash, then
-- it tries Ada_Name_01, Ada_Name_02 ... Ada_Name_99 in sequence.
function Get_Main_Unit_Name (S : String) return String;
-- Return the main unit name corresponding to S by replacing '.' with '_'
function Get_Main_Name return String;
-- This function is used in the Ada main output case to compute the
-- correct external main program. It is "main" by default, unless the
-- flag Use_Ada_Main_Program_Name_On_Target is set, in which case it
-- is the name of the Ada main name without the "_ada". This default
-- can be overridden explicitly using the -Mname binder switch.
function Get_WC_Encoding return Character;
-- Return wide character encoding method to set as WC_Encoding in output.
-- If -W has been used, returns the specified encoding, otherwise returns
-- the encoding method used for the main program source. If there is no
-- main program source (-z switch used), returns brackets ('b').
function Lt_Linker_Option (Op1, Op2 : Natural) return Boolean;
-- Compare linker options, when sorting, first according to
-- Is_Internal_File (internal files come later) and then by
-- elaboration order position (latest to earliest).
procedure Move_Linker_Option (From : Natural; To : Natural);
-- Move routine for sorting linker options
procedure Resolve_Binder_Options;
-- Set the value of With_GNARL and With_DECGNAT. The latter only on VMS
-- since it tests for a package named "dec" which might cause a conflict
-- on non-VMS systems.
procedure Set_Char (C : Character);
-- Set given character in Statement_Buffer at the Last + 1 position
-- and increment Last by one to reflect the stored character.
procedure Set_Int (N : Int);
-- Set given value in decimal in Statement_Buffer with no spaces
-- starting at the Last + 1 position, and updating Last past the value.
-- A minus sign is output for a negative value.
procedure Set_Boolean (B : Boolean);
-- Set given boolean value in Statement_Buffer at the Last + 1 position
-- and update Last past the value.
procedure Set_IS_Pragma_Table;
-- Initializes contents of IS_Pragma_Settings table from ALI table
procedure Set_Main_Program_Name;
-- Given the main program name in Name_Buffer (length in Name_Len)
-- generate the name of the routine to be used in the call. The name
-- is generated starting at Last + 1, and Last is updated past it.
procedure Set_Name_Buffer;
-- Set the value stored in positions 1 .. Name_Len of the Name_Buffer
procedure Set_PSD_Pragma_Table;
-- Initializes contents of PSD_Pragma_Settings table from ALI table
procedure Set_String (S : String);
-- Sets characters of given string in Statement_Buffer, starting at the
-- Last + 1 position, and updating last past the string value.
procedure Set_Unit_Name;
-- Given a unit name in the Name_Buffer, copies it to Statement_Buffer,
-- starting at the Last + 1 position, and updating last past the value.
-- changing periods to double underscores, and updating Last appropriately.
procedure Set_Unit_Number (U : Unit_Id);
-- Sets unit number (first unit is 1, leading zeroes output to line
-- up all output unit numbers nicely as required by the value, and
-- by the total number of units.
procedure Write_Info_Ada_C (Ada : String; C : String; Common : String);
-- For C code case, write C & Common, for Ada case write Ada & Common
-- to current binder output file using Write_Binder_Info.
procedure Write_Statement_Buffer;
-- Write out contents of statement buffer up to Last, and reset Last to 0
procedure Write_Statement_Buffer (S : String);
-- First writes its argument (using Set_String (S)), then writes out the
-- contents of statement buffer up to Last, and reset Last to 0
------------------------------------
-- Check_System_Restrictions_Used --
------------------------------------
procedure Check_System_Restrictions_Used is
begin
for J in Units.First .. Units.Last loop
if Get_Name_String (Units.Table (J).Sfile) = "s-restri.ads" then
System_Restrictions_Used := True;
return;
end if;
end loop;
System_Restrictions_Used := False;
end Check_System_Restrictions_Used;
----------------------
-- Gen_Adafinal_Ada --
----------------------
procedure Gen_Adafinal_Ada is
begin
WBI ("");
WBI (" procedure " & Ada_Final_Name.all & " is");
WBI (" begin");
-- If compiling for the JVM, we directly call Adafinal because
-- we don't import it via Do_Finalize (see Gen_Output_File_Ada).
if VM_Target /= No_VM then
WBI (" System.Standard_Library.Adafinal;");
-- If there is no finalization, there is nothing to do
elsif Cumulative_Restrictions.Set (No_Finalization) then
WBI (" null;");
else
WBI (" Do_Finalize;");
end if;
WBI (" end " & Ada_Final_Name.all & ";");
end Gen_Adafinal_Ada;
--------------------
-- Gen_Adafinal_C --
--------------------
procedure Gen_Adafinal_C is
begin
WBI ("void " & Ada_Final_Name.all & " (void) {");
WBI (" system__standard_library__adafinal ();");
WBI ("}");
WBI ("");
end Gen_Adafinal_C;
---------------------
-- Gen_Adainit_Ada --
---------------------
procedure Gen_Adainit_Ada is
Main_Priority : Int renames ALIs.Table (ALIs.First).Main_Priority;
begin
WBI (" procedure " & Ada_Init_Name.all & " is");
-- Generate externals for elaboration entities
for E in Elab_Order.First .. Elab_Order.Last loop
declare
Unum : constant Unit_Id := Elab_Order.Table (E);
U : Unit_Record renames Units.Table (Unum);
begin
-- Check for Elab_Entity to be set for this unit
if U.Set_Elab_Entity
-- Don't generate reference for stand alone library
and then not U.SAL_Interface
-- Don't generate reference for predefined file in No_Run_Time
-- mode, since we don't include the object files in this case
and then not
(No_Run_Time_Mode
and then Is_Predefined_File_Name (U.Sfile))
then
Set_String (" ");
Set_String ("E");
Set_Unit_Number (Unum);
case VM_Target is
when No_VM | JVM_Target =>
Set_String (" : Boolean; pragma Import (Ada, ");
when CLI_Target =>
Set_String (" : Boolean; pragma Import (CIL, ");
end case;
Set_String ("E");
Set_Unit_Number (Unum);
Set_String (", """);
Get_Name_String (U.Uname);
-- In the case of JGNAT we need to emit an Import name
-- that includes the class name (using '$' separators
-- in the case of a child unit name).
if VM_Target /= No_VM then
for J in 1 .. Name_Len - 2 loop
if VM_Target = CLI_Target
or else Name_Buffer (J) /= '.'
then
Set_Char (Name_Buffer (J));
else
Set_String ("$");
end if;
end loop;
if VM_Target /= CLI_Target or else U.Unit_Kind = 's' then
Set_String (".");
else
Set_String ("_pkg.");
end if;
-- If the unit name is very long, then split the
-- Import link name across lines using "&" (occurs
-- in some C2 tests).
if 2 * Name_Len + 60 > Hostparm.Max_Line_Length then
Set_String (""" &");
Write_Statement_Buffer;
Set_String (" """);
end if;
end if;
Set_Unit_Name;
Set_String ("_E"");");
Write_Statement_Buffer;
end if;
end;
end loop;
Write_Statement_Buffer;
-- If the standard library is suppressed, then the only global variable
-- that might be needed (by the Ravenscar profile) is the priority of
-- the environment.
if Suppress_Standard_Library_On_Target then
if Main_Priority /= No_Main_Priority then
WBI (" Main_Priority : Integer;");
WBI (" pragma Import (C, Main_Priority," &
" ""__gl_main_priority"");");
WBI ("");
end if;
WBI (" begin");
if Main_Priority /= No_Main_Priority then
Set_String (" Main_Priority := ");
Set_Int (Main_Priority);
Set_Char (';');
Write_Statement_Buffer;
else
WBI (" null;");
end if;
-- Normal case (standard library not suppressed). Set all global values
-- used by the run time.
else
WBI (" Main_Priority : Integer;");
WBI (" pragma Import (C, Main_Priority, " &
"""__gl_main_priority"");");
WBI (" Time_Slice_Value : Integer;");
WBI (" pragma Import (C, Time_Slice_Value, " &
"""__gl_time_slice_val"");");
WBI (" WC_Encoding : Character;");
WBI (" pragma Import (C, WC_Encoding, ""__gl_wc_encoding"");");
WBI (" Locking_Policy : Character;");
WBI (" pragma Import (C, Locking_Policy, " &
"""__gl_locking_policy"");");
WBI (" Queuing_Policy : Character;");
WBI (" pragma Import (C, Queuing_Policy, " &
"""__gl_queuing_policy"");");
WBI (" Task_Dispatching_Policy : Character;");
WBI (" pragma Import (C, Task_Dispatching_Policy, " &
"""__gl_task_dispatching_policy"");");
WBI (" Priority_Specific_Dispatching : System.Address;");
WBI (" pragma Import (C, Priority_Specific_Dispatching, " &
"""__gl_priority_specific_dispatching"");");
WBI (" Num_Specific_Dispatching : Integer;");
WBI (" pragma Import (C, Num_Specific_Dispatching, " &
"""__gl_num_specific_dispatching"");");
WBI (" Interrupt_States : System.Address;");
WBI (" pragma Import (C, Interrupt_States, " &
"""__gl_interrupt_states"");");
WBI (" Num_Interrupt_States : Integer;");
WBI (" pragma Import (C, Num_Interrupt_States, " &
"""__gl_num_interrupt_states"");");
WBI (" Unreserve_All_Interrupts : Integer;");
WBI (" pragma Import (C, Unreserve_All_Interrupts, " &
"""__gl_unreserve_all_interrupts"");");
if Exception_Tracebacks then
WBI (" Exception_Tracebacks : Integer;");
WBI (" pragma Import (C, Exception_Tracebacks, " &
"""__gl_exception_tracebacks"");");
end if;
WBI (" Zero_Cost_Exceptions : Integer;");
WBI (" pragma Import (C, Zero_Cost_Exceptions, " &
"""__gl_zero_cost_exceptions"");");
WBI (" Detect_Blocking : Integer;");
WBI (" pragma Import (C, Detect_Blocking, " &
"""__gl_detect_blocking"");");
WBI (" Default_Stack_Size : Integer;");
WBI (" pragma Import (C, Default_Stack_Size, " &
"""__gl_default_stack_size"");");
WBI (" Leap_Seconds_Support : Integer;");
WBI (" pragma Import (C, Leap_Seconds_Support, " &
"""__gl_leap_seconds_support"");");
-- Import entry point for elaboration time signal handler
-- installation, and indication of if it's been called previously.
WBI ("");
WBI (" procedure Install_Handler;");
WBI (" pragma Import (C, Install_Handler, " &
"""__gnat_install_handler"");");
WBI ("");
WBI (" Handler_Installed : Integer;");
WBI (" pragma Import (C, Handler_Installed, " &
"""__gnat_handler_installed"");");
-- Import entry point for environment feature enable/disable
-- routine, and indication that it's been called previously.
if OpenVMS_On_Target then
WBI ("");
WBI (" procedure Set_Features;");
WBI (" pragma Import (C, Set_Features, " &
"""__gnat_set_features"");");
WBI ("");
WBI (" Features_Set : Integer;");
WBI (" pragma Import (C, Features_Set, " &
"""__gnat_features_set"");");
end if;
-- Initialize stack limit variable of the environment task if the
-- stack check method is stack limit and stack check is enabled.
if Stack_Check_Limits_On_Target
and then (Stack_Check_Default_On_Target or Stack_Check_Switch_Set)
then
WBI ("");
WBI (" procedure Initialize_Stack_Limit;");
WBI (" pragma Import (C, Initialize_Stack_Limit, " &
"""__gnat_initialize_stack_limit"");");
end if;
-- Special processing when main program is CIL function/procedure
if VM_Target = CLI_Target
and then Bind_Main_Program
and then not No_Main_Subprogram
then
WBI ("");
-- Function case, use Set_Exit_Status to report the returned
-- status code, since that is the only mechanism available.
if ALIs.Table (ALIs.First).Main_Program = Func then
WBI (" Result : Integer;");
WBI (" procedure Set_Exit_Status (Code : Integer);");
WBI (" pragma Import (C, Set_Exit_Status, " &
"""__gnat_set_exit_status"");");
WBI ("");
WBI (" function Ada_Main_Program return Integer;");
-- Procedure case
else
WBI (" procedure Ada_Main_Program;");
end if;
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
Name_Len := Name_Len - 2;
WBI (" pragma Import (CIL, Ada_Main_Program, """
& Name_Buffer (1 .. Name_Len) & "."
& Get_Main_Unit_Name (Name_Buffer (1 .. Name_Len)) & """);");
end if;
WBI (" begin");
Set_String (" Main_Priority := ");
Set_Int (Main_Priority);
Set_Char (';');
Write_Statement_Buffer;
Set_String (" Time_Slice_Value := ");
if Task_Dispatching_Policy_Specified = 'F'
and then ALIs.Table (ALIs.First).Time_Slice_Value = -1
then
Set_Int (0);
else
Set_Int (ALIs.Table (ALIs.First).Time_Slice_Value);
end if;
Set_Char (';');
Write_Statement_Buffer;
Set_String (" WC_Encoding := '");
Set_Char (Get_WC_Encoding);
Set_String ("';");
Write_Statement_Buffer;
Set_String (" Locking_Policy := '");
Set_Char (Locking_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
Set_String (" Queuing_Policy := '");
Set_Char (Queuing_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
Set_String (" Task_Dispatching_Policy := '");
Set_Char (Task_Dispatching_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
Gen_Restrictions_Ada;
WBI (" Priority_Specific_Dispatching :=");
WBI (" Local_Priority_Specific_Dispatching'Address;");
Set_String (" Num_Specific_Dispatching := ");
Set_Int (PSD_Pragma_Settings.Last + 1);
Set_Char (';');
Write_Statement_Buffer;
WBI (" Interrupt_States := Local_Interrupt_States'Address;");
Set_String (" Num_Interrupt_States := ");
Set_Int (IS_Pragma_Settings.Last + 1);
Set_Char (';');
Write_Statement_Buffer;
Set_String (" Unreserve_All_Interrupts := ");
if Unreserve_All_Interrupts_Specified then
Set_String ("1");
else
Set_String ("0");
end if;
Set_Char (';');
Write_Statement_Buffer;
if Exception_Tracebacks then
WBI (" Exception_Tracebacks := 1;");
end if;
Set_String (" Zero_Cost_Exceptions := ");
if Zero_Cost_Exceptions_Specified then
Set_String ("1");
else
Set_String ("0");
end if;
Set_String (";");
Write_Statement_Buffer;
Set_String (" Detect_Blocking := ");
if Detect_Blocking then
Set_Int (1);
else
Set_Int (0);
end if;
Set_String (";");
Write_Statement_Buffer;
Set_String (" Default_Stack_Size := ");
Set_Int (Default_Stack_Size);
Set_String (";");
Write_Statement_Buffer;
Set_String (" Leap_Seconds_Support := ");
if Leap_Seconds_Support then
Set_Int (1);
else
Set_Int (0);
end if;
Set_String (";");
Write_Statement_Buffer;
-- Generate call to Install_Handler
WBI ("");
WBI (" if Handler_Installed = 0 then");
WBI (" Install_Handler;");
WBI (" end if;");
-- Generate call to Set_Features
if OpenVMS_On_Target then
WBI ("");
WBI (" if Features_Set = 0 then");
WBI (" Set_Features;");
WBI (" end if;");
end if;
end if;
-- Generate call to set Initialize_Scalar values if active
if Initialize_Scalars_Used then
WBI ("");
Set_String (" System.Scalar_Values.Initialize ('");
Set_Char (Initialize_Scalars_Mode1);
Set_String ("', '");
Set_Char (Initialize_Scalars_Mode2);
Set_String ("');");
Write_Statement_Buffer;
end if;
-- Generate assignment of default secondary stack size if set
if Sec_Stack_Used and then Default_Sec_Stack_Size /= -1 then
WBI ("");
Set_String (" System.Secondary_Stack.");
Set_String ("Default_Secondary_Stack_Size := ");
Set_Int (Opt.Default_Sec_Stack_Size);
Set_Char (';');
Write_Statement_Buffer;
end if;
-- Initialize stack limit variable of the environment task if the
-- stack check method is stack limit and stack check is enabled.
if Stack_Check_Limits_On_Target
and then (Stack_Check_Default_On_Target or Stack_Check_Switch_Set)
then
WBI ("");
WBI (" Initialize_Stack_Limit;");
end if;
-- Generate elaboration calls
WBI ("");
Gen_Elab_Calls_Ada;
-- Case of main program is CIL function or procedure
if VM_Target = CLI_Target
and then Bind_Main_Program
and then not No_Main_Subprogram
then
-- For function case, use Set_Exit_Status to set result
if ALIs.Table (ALIs.First).Main_Program = Func then
WBI (" Result := Ada_Main_Program;");
WBI (" Set_Exit_Status (Result);");
-- Procedure case
else
WBI (" Ada_Main_Program;");
end if;
end if;
WBI (" end " & Ada_Init_Name.all & ";");
end Gen_Adainit_Ada;
-------------------
-- Gen_Adainit_C --
--------------------
procedure Gen_Adainit_C is
Main_Priority : Int renames ALIs.Table (ALIs.First).Main_Priority;
begin
WBI ("void " & Ada_Init_Name.all & " (void)");
WBI ("{");
-- Generate externals for elaboration entities
for E in Elab_Order.First .. Elab_Order.Last loop
declare
Unum : constant Unit_Id := Elab_Order.Table (E);
U : Unit_Record renames Units.Table (Unum);
begin
-- Check for Elab entity to be set for this unit
if U.Set_Elab_Entity
-- Don't generate reference for stand alone library
and then not U.SAL_Interface
-- Don't generate reference for predefined file in No_Run_Time
-- mode, since we don't include the object files in this case
and then not
(No_Run_Time_Mode
and then Is_Predefined_File_Name (U.Sfile))
then
Set_String (" extern char ");
Get_Name_String (U.Uname);
Set_Unit_Name;
Set_String ("_E;");
Write_Statement_Buffer;
end if;
end;
end loop;
Write_Statement_Buffer;
-- Standard library suppressed
if Suppress_Standard_Library_On_Target then
-- Case of High_Integrity_Mode mode. Set __gl_main_priority if needed
-- for the Ravenscar profile.
if Main_Priority /= No_Main_Priority then
WBI (" extern int __gl_main_priority;");
Set_String (" __gl_main_priority = ");
Set_Int (Main_Priority);
Set_Char (';');
Write_Statement_Buffer;
end if;
-- Normal case (standard library not suppressed)
else
-- Generate definition for interrupt states string
Set_String (" static const char *local_interrupt_states = """);
for J in 0 .. IS_Pragma_Settings.Last loop
Set_Char (IS_Pragma_Settings.Table (J));
end loop;
Set_String (""";");
Write_Statement_Buffer;
-- Generate definition for priority specific dispatching string
Set_String
(" static const char *local_priority_specific_dispatching = """);
for J in 0 .. PSD_Pragma_Settings.Last loop
Set_Char (PSD_Pragma_Settings.Table (J));
end loop;
Set_String (""";");
Write_Statement_Buffer;
-- Generate declaration for secondary stack default if needed
if Sec_Stack_Used and then Default_Sec_Stack_Size /= -1 then
WBI (" extern int system__secondary_stack__" &
"default_secondary_stack_size;");
end if;
WBI ("");
-- Code for normal case (standard library not suppressed)
-- We call the routine from inside adainit() because this works for
-- both programs with and without binder generated "main" functions.
WBI (" extern int __gl_main_priority;");
Set_String (" __gl_main_priority = ");
Set_Int (Main_Priority);
Set_Char (';');
Write_Statement_Buffer;
WBI (" extern int __gl_time_slice_val;");
Set_String (" __gl_time_slice_val = ");
if Task_Dispatching_Policy = 'F'
and then ALIs.Table (ALIs.First).Time_Slice_Value = -1
then
Set_Int (0);
else
Set_Int (ALIs.Table (ALIs.First).Time_Slice_Value);
end if;
Set_Char (';');
Write_Statement_Buffer;
WBI (" extern char __gl_wc_encoding;");
Set_String (" __gl_wc_encoding = '");
Set_Char (Get_WC_Encoding);
Set_String ("';");
Write_Statement_Buffer;
WBI (" extern char __gl_locking_policy;");
Set_String (" __gl_locking_policy = '");
Set_Char (Locking_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
WBI (" extern char __gl_queuing_policy;");
Set_String (" __gl_queuing_policy = '");
Set_Char (Queuing_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
WBI (" extern char __gl_task_dispatching_policy;");
Set_String (" __gl_task_dispatching_policy = '");
Set_Char (Task_Dispatching_Policy_Specified);
Set_String ("';");
Write_Statement_Buffer;
Gen_Restrictions_C;
WBI (" extern const void *__gl_interrupt_states;");
WBI (" __gl_interrupt_states = local_interrupt_states;");
WBI (" extern int __gl_num_interrupt_states;");
Set_String (" __gl_num_interrupt_states = ");
Set_Int (IS_Pragma_Settings.Last + 1);
Set_String (";");
Write_Statement_Buffer;
WBI (" extern const void *__gl_priority_specific_dispatching;");
WBI (" __gl_priority_specific_dispatching =" &
" local_priority_specific_dispatching;");
WBI (" extern int __gl_num_specific_dispatching;");
Set_String (" __gl_num_specific_dispatching = ");
Set_Int (PSD_Pragma_Settings.Last + 1);
Set_String (";");
Write_Statement_Buffer;
WBI (" extern int __gl_unreserve_all_interrupts;");
Set_String (" __gl_unreserve_all_interrupts = ");
Set_Int (Boolean'Pos (Unreserve_All_Interrupts_Specified));
Set_String (";");
Write_Statement_Buffer;
if Exception_Tracebacks then
WBI (" extern int __gl_exception_tracebacks;");
WBI (" __gl_exception_tracebacks = 1;");
end if;
WBI (" extern int __gl_zero_cost_exceptions;");
Set_String (" __gl_zero_cost_exceptions = ");
Set_Int (Boolean'Pos (Zero_Cost_Exceptions_Specified));
Set_String (";");
Write_Statement_Buffer;
WBI (" extern int __gl_detect_blocking;");
Set_String (" __gl_detect_blocking = ");
if Detect_Blocking then
Set_Int (1);
else
Set_Int (0);
end if;
Set_String (";");
Write_Statement_Buffer;
WBI (" extern int __gl_default_stack_size;");
Set_String (" __gl_default_stack_size = ");
Set_Int (Default_Stack_Size);
Set_String (";");
Write_Statement_Buffer;
WBI (" extern int __gl_leap_seconds_support;");
Set_String (" __gl_leap_seconds_support = ");
if Leap_Seconds_Support then
Set_Int (1);
else
Set_Int (0);
end if;
Set_String (";");
Write_Statement_Buffer;
WBI ("");
-- Install elaboration time signal handler
WBI (" if (__gnat_handler_installed == 0)");
WBI (" {");
WBI (" __gnat_install_handler ();");
WBI (" }");
-- Call feature enable/disable routine
if OpenVMS_On_Target then
WBI (" if (__gnat_features_set == 0)");
WBI (" {");
WBI (" __gnat_set_features ();");
WBI (" }");
end if;
end if;
-- Initialize stack limit for the environment task if the stack
-- check method is stack limit and stack check is enabled.
if Stack_Check_Limits_On_Target
and then (Stack_Check_Default_On_Target or Stack_Check_Switch_Set)
then
WBI ("");
WBI (" __gnat_initialize_stack_limit ();");
end if;
-- Generate call to set Initialize_Scalar values if needed
if Initialize_Scalars_Used then
WBI ("");
Set_String (" system__scalar_values__initialize('");
Set_Char (Initialize_Scalars_Mode1);
Set_String ("', '");
Set_Char (Initialize_Scalars_Mode2);
Set_String ("');");
Write_Statement_Buffer;
end if;
-- Generate assignment of default secondary stack size if set
if Sec_Stack_Used and then Default_Sec_Stack_Size /= -1 then
WBI ("");
Set_String (" system__secondary_stack__");
Set_String ("default_secondary_stack_size = ");
Set_Int (Opt.Default_Sec_Stack_Size);
Set_Char (';');
Write_Statement_Buffer;
end if;
-- Generate elaboration calls
WBI ("");
Gen_Elab_Calls_C;
WBI ("}");
end Gen_Adainit_C;
------------------------
-- Gen_Elab_Calls_Ada --
------------------------
procedure Gen_Elab_Calls_Ada is
begin
for E in Elab_Order.First .. Elab_Order.Last loop
declare
Unum : constant Unit_Id := Elab_Order.Table (E);
U : Unit_Record renames Units.Table (Unum);
Unum_Spec : Unit_Id;
-- This is the unit number of the spec that corresponds to
-- this entry. It is the same as Unum except when the body
-- and spec are different and we are currently processing
-- the body, in which case it is the spec (Unum + 1).
begin
if U.Utype = Is_Body then
Unum_Spec := Unum + 1;
else
Unum_Spec := Unum;
end if;
-- Nothing to do if predefined unit in no run time mode
if No_Run_Time_Mode and then Is_Predefined_File_Name (U.Sfile) then
null;
-- Case of no elaboration code
elsif U.No_Elab then
-- The only case in which we have to do something is if
-- this is a body, with a separate spec, where the separate
-- spec has an elaboration entity defined.
-- In that case, this is where we set the elaboration entity
-- to True, we do not need to test if this has already been
-- done, since it is quicker to set the flag than to test it.
if not U.SAL_Interface and then U.Utype = Is_Body
and then Units.Table (Unum_Spec).Set_Elab_Entity
then
Set_String (" E");
Set_Unit_Number (Unum_Spec);
Set_String (" := True;");
Write_Statement_Buffer;
end if;
-- Here if elaboration code is present. If binding a library
-- or if there is a non-Ada main subprogram then we generate:
-- if not uname_E then
-- uname'elab_[spec|body];
-- uname_E := True;
-- end if;
-- Otherwise, elaboration routines are called unconditionally:
-- uname'elab_[spec|body];
-- uname_E := True;
-- The uname_E assignment is skipped if this is a separate spec,
-- since the assignment will be done when we process the body.
elsif not U.SAL_Interface then
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
Set_String (" if not E");
Set_Unit_Number (Unum_Spec);
Set_String (" then");
Write_Statement_Buffer;
Set_String (" ");
end if;
Set_String (" ");
Get_Decoded_Name_String_With_Brackets (U.Uname);
if VM_Target = CLI_Target and then U.Unit_Kind /= 's' then
if Name_Buffer (Name_Len) = 's' then
Name_Buffer (Name_Len - 1 .. Name_Len + 12) :=
"_pkg'elab_spec";
else
Name_Buffer (Name_Len - 1 .. Name_Len + 12) :=
"_pkg'elab_body";
end if;
Name_Len := Name_Len + 12;
else
if Name_Buffer (Name_Len) = 's' then
Name_Buffer (Name_Len - 1 .. Name_Len + 8) :=
"'elab_spec";
else
Name_Buffer (Name_Len - 1 .. Name_Len + 8) :=
"'elab_body";
end if;
Name_Len := Name_Len + 8;
end if;
Set_Casing (U.Icasing);
Set_Name_Buffer;
Set_Char (';');
Write_Statement_Buffer;
if U.Utype /= Is_Spec then
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
Set_String (" ");
end if;
Set_String (" E");
Set_Unit_Number (Unum_Spec);
Set_String (" := True;");
Write_Statement_Buffer;
end if;
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
WBI (" end if;");
end if;
end if;
end;
end loop;
end Gen_Elab_Calls_Ada;
----------------------
-- Gen_Elab_Calls_C --
----------------------
procedure Gen_Elab_Calls_C is
begin
for E in Elab_Order.First .. Elab_Order.Last loop
declare
Unum : constant Unit_Id := Elab_Order.Table (E);
U : Unit_Record renames Units.Table (Unum);
Unum_Spec : Unit_Id;
-- This is the unit number of the spec that corresponds to
-- this entry. It is the same as Unum except when the body
-- and spec are different and we are currently processing
-- the body, in which case it is the spec (Unum + 1).
begin
if U.Utype = Is_Body then
Unum_Spec := Unum + 1;
else
Unum_Spec := Unum;
end if;
-- Nothing to do if predefined unit in no run time mode
if No_Run_Time_Mode and then Is_Predefined_File_Name (U.Sfile) then
null;
-- Case of no elaboration code
elsif U.No_Elab then
-- The only case in which we have to do something is if
-- this is a body, with a separate spec, where the separate
-- spec has an elaboration entity defined.
-- In that case, this is where we set the elaboration entity
-- to True, we do not need to test if this has already been
-- done, since it is quicker to set the flag than to test it.
if not U.SAL_Interface and then U.Utype = Is_Body
and then Units.Table (Unum_Spec).Set_Elab_Entity
then
Set_String (" ");
Get_Name_String (U.Uname);
Set_Unit_Name;
Set_String ("_E = 1;");
Write_Statement_Buffer;
end if;
-- Here if elaboration code is present. If binding a library
-- or if there is a non-Ada main subprogram then we generate:
-- if (uname_E == 0) {
-- uname__elab[s|b] ();
-- uname_E++;
-- }
-- The uname_E assignment is skipped if this is a separate spec,
-- since the assignment will be done when we process the body.
elsif not U.SAL_Interface then
Get_Name_String (U.Uname);
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
Set_String (" if (");
Set_Unit_Name;
Set_String ("_E == 0) {");
Write_Statement_Buffer;
Set_String (" ");
end if;
Set_String (" ");
Set_Unit_Name;
Set_String ("___elab");
Set_Char (Name_Buffer (Name_Len)); -- 's' or 'b' for spec/body
Set_String (" ();");
Write_Statement_Buffer;
if U.Utype /= Is_Spec then
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
Set_String (" ");
end if;
Set_String (" ");
Set_Unit_Name;
Set_String ("_E++;");
Write_Statement_Buffer;
end if;
if Force_Checking_Of_Elaboration_Flags or
Interface_Library_Unit or
(not Bind_Main_Program)
then
WBI (" }");
end if;
end if;
end;
end loop;
end Gen_Elab_Calls_C;
----------------------
-- Gen_Elab_Defs_C --
----------------------
procedure Gen_Elab_Defs_C is
begin
for E in Elab_Order.First .. Elab_Order.Last loop
-- Generate declaration of elaboration procedure if elaboration
-- needed. Note that passive units are always excluded.
if not Units.Table (Elab_Order.Table (E)).No_Elab then
Get_Name_String (Units.Table (Elab_Order.Table (E)).Uname);
Set_String ("extern void ");
Set_Unit_Name;
Set_String ("___elab");
Set_Char (Name_Buffer (Name_Len)); -- 's' or 'b' for spec/body
Set_String (" (void);");
Write_Statement_Buffer;
end if;
end loop;
WBI ("");
end Gen_Elab_Defs_C;
------------------------
-- Gen_Elab_Order_Ada --
------------------------
procedure Gen_Elab_Order_Ada is
begin
WBI ("");
WBI (" -- BEGIN ELABORATION ORDER");
for J in Elab_Order.First .. Elab_Order.Last loop
Set_String (" -- ");
Get_Name_String (Units.Table (Elab_Order.Table (J)).Uname);
Set_Name_Buffer;
Write_Statement_Buffer;
end loop;
WBI (" -- END ELABORATION ORDER");
end Gen_Elab_Order_Ada;
----------------------
-- Gen_Elab_Order_C --
----------------------
procedure Gen_Elab_Order_C is
begin
WBI ("");
WBI ("/* BEGIN ELABORATION ORDER");
for J in Elab_Order.First .. Elab_Order.Last loop
Get_Name_String (Units.Table (Elab_Order.Table (J)).Uname);
Set_Name_Buffer;
Write_Statement_Buffer;
end loop;
WBI (" END ELABORATION ORDER */");
end Gen_Elab_Order_C;
------------------
-- Gen_Main_Ada --
------------------
procedure Gen_Main_Ada is
begin
WBI ("");
if Exit_Status_Supported_On_Target then
Set_String (" function ");
else
Set_String (" procedure ");
end if;
Set_String (Get_Main_Name);
if Command_Line_Args_On_Target then
Write_Statement_Buffer;
WBI (" (argc : Integer;");
WBI (" argv : System.Address;");
WBI (" envp : System.Address)");
if Exit_Status_Supported_On_Target then
WBI (" return Integer");
end if;
WBI (" is");
else
if Exit_Status_Supported_On_Target then
Set_String (" return Integer is");
else
Set_String (" is");
end if;
Write_Statement_Buffer;
end if;
if Opt.Default_Exit_Status /= 0
and then Bind_Main_Program
and then not Configurable_Run_Time_Mode
then
WBI (" procedure Set_Exit_Status (Status : Integer);");
WBI (" pragma Import (C, Set_Exit_Status, " &
"""__gnat_set_exit_status"");");
WBI ("");
end if;
-- Initialize and Finalize
if not Cumulative_Restrictions.Set (No_Finalization) then
WBI (" procedure initialize (Addr : System.Address);");
WBI (" pragma Import (C, initialize, ""__gnat_initialize"");");
WBI ("");
WBI (" procedure finalize;");
WBI (" pragma Import (C, finalize, ""__gnat_finalize"");");
end if;
-- If we want to analyze the stack, we have to import corresponding
-- symbols
if Dynamic_Stack_Measurement then
WBI ("");
WBI (" procedure Output_Results;");
WBI (" pragma Import (C, Output_Results, " &
"""__gnat_stack_usage_output_results"");");
WBI ("");
WBI (" " &
"procedure Initialize_Stack_Analysis (Buffer_Size : Natural);");
WBI (" pragma Import (C, Initialize_Stack_Analysis, " &
"""__gnat_stack_usage_initialize"");");
end if;
-- Deal with declarations for main program case
if not No_Main_Subprogram then
-- To call the main program, we declare it using a pragma Import
-- Ada with the right link name.
-- It might seem more obvious to "with" the main program, and call
-- it in the normal Ada manner. We do not do this for three reasons:
-- 1. It is more efficient not to recompile the main program
-- 2. We are not entitled to assume the source is accessible
-- 3. We don't know what options to use to compile it
-- It is really reason 3 that is most critical (indeed we used
-- to generate the "with", but several regression tests failed).
WBI ("");
if ALIs.Table (ALIs.First).Main_Program = Func then
WBI (" Result : Integer;");
WBI ("");
WBI (" function Ada_Main_Program return Integer;");
else
WBI (" procedure Ada_Main_Program;");
end if;
Set_String (" pragma Import (Ada, Ada_Main_Program, """);
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
Set_Main_Program_Name;
Set_String (""");");
Write_Statement_Buffer;
WBI ("");
if Bind_Main_Program
and then not Suppress_Standard_Library_On_Target
then
WBI (" SEH : aliased array (1 .. 2) of Integer;");
WBI ("");
end if;
end if;
-- Generate a reference to Ada_Main_Program_Name. This symbol is
-- not referenced elsewhere in the generated program, but is needed
-- by the debugger (that's why it is generated in the first place).
-- The reference stops Ada_Main_Program_Name from being optimized
-- away by smart linkers, such as the AiX linker.
-- Because this variable is unused, we make this variable "aliased"
-- with a pragma Volatile in order to tell the compiler to preserve
-- this variable at any level of optimization.
if Bind_Main_Program then
WBI
(" Ensure_Reference : aliased System.Address := " &
"Ada_Main_Program_Name'Address;");
WBI (" pragma Volatile (Ensure_Reference);");
WBI ("");
end if;
WBI (" begin");
-- Acquire command line arguments if present on target
if Command_Line_Args_On_Target then
WBI (" gnat_argc := argc;");
WBI (" gnat_argv := argv;");
WBI (" gnat_envp := envp;");
WBI ("");
-- If configurable run time and no command line args, then nothing
-- needs to be done since the gnat_argc/argv/envp variables are
-- suppressed in this case.
elsif Configurable_Run_Time_On_Target then
null;
-- Otherwise set dummy values (to be filled in by some other unit?)
else
WBI (" gnat_argc := 0;");
WBI (" gnat_argv := System.Null_Address;");
WBI (" gnat_envp := System.Null_Address;");
end if;
if Opt.Default_Exit_Status /= 0
and then Bind_Main_Program
and then not Configurable_Run_Time_Mode
then
Set_String (" Set_Exit_Status (");
Set_Int (Opt.Default_Exit_Status);
Set_String (");");
Write_Statement_Buffer;
end if;
if Dynamic_Stack_Measurement then
Set_String (" Initialize_Stack_Analysis (");
Set_Int (Dynamic_Stack_Measurement_Array_Size);
Set_String (");");
Write_Statement_Buffer;
end if;
if not Cumulative_Restrictions.Set (No_Finalization) then
if not No_Main_Subprogram
and then Bind_Main_Program
and then not Suppress_Standard_Library_On_Target
then
WBI (" Initialize (SEH'Address);");
else
WBI (" Initialize (System.Null_Address);");
end if;
end if;
WBI (" " & Ada_Init_Name.all & ";");
if not No_Main_Subprogram then
WBI (" Break_Start;");
if ALIs.Table (ALIs.First).Main_Program = Proc then
WBI (" Ada_Main_Program;");
else
WBI (" Result := Ada_Main_Program;");
end if;
end if;
-- Adafinal call is skipped if no finalization
if not Cumulative_Restrictions.Set (No_Finalization) then
-- If compiling for the JVM, we directly call Adafinal because
-- we don't import it via Do_Finalize (see Gen_Output_File_Ada).
if VM_Target = No_VM then
WBI (" Do_Finalize;");
else
WBI (" System.Standard_Library.Adafinal;");
end if;
end if;
-- Prints the result of static stack analysis
if Dynamic_Stack_Measurement then
WBI (" Output_Results;");
end if;
-- Finalize is only called if we have a run time
if not Cumulative_Restrictions.Set (No_Finalization) then
WBI (" Finalize;");
end if;
-- Return result
if Exit_Status_Supported_On_Target then
if No_Main_Subprogram
or else ALIs.Table (ALIs.First).Main_Program = Proc
then
WBI (" return (gnat_exit_status);");
else
WBI (" return (Result);");
end if;
end if;
WBI (" end;");
end Gen_Main_Ada;
----------------
-- Gen_Main_C --
----------------
procedure Gen_Main_C is
begin
if Exit_Status_Supported_On_Target then
WBI ("#include <stdlib.h>");
Set_String ("int ");
else
Set_String ("void ");
end if;
Set_String (Get_Main_Name);
-- Generate command line args in prototype if present on target
if Command_Line_Args_On_Target then
Write_Statement_Buffer (" (int argc, char **argv, char **envp)");
-- Case of no command line arguments on target
else
Write_Statement_Buffer (" (void)");
end if;
WBI ("{");
-- Generate a reference to __gnat_ada_main_program_name. This symbol
-- is not referenced elsewhere in the generated program, but is
-- needed by the debugger (that's why it is generated in the first
-- place). The reference stops Ada_Main_Program_Name from being
-- optimized away by smart linkers, such as the AiX linker.
-- Because this variable is unused, we declare this variable as
-- volatile in order to tell the compiler to preserve it at any
-- level of optimization.
if Bind_Main_Program then
WBI (" char * volatile ensure_reference " &
"__attribute__ ((__unused__)) = " &
"__gnat_ada_main_program_name;");
WBI ("");
if not Suppress_Standard_Library_On_Target
and then not No_Main_Subprogram
then
WBI (" int SEH [2];");
WBI ("");
end if;
end if;
-- If main program is a function, generate result variable
if ALIs.Table (ALIs.First).Main_Program = Func then
WBI (" int result;");
end if;
-- Set command line argument values from parameters if command line
-- arguments are present on target
if Command_Line_Args_On_Target then
WBI (" gnat_argc = argc;");
WBI (" gnat_argv = argv;");
WBI (" gnat_envp = envp;");
WBI (" ");
-- If configurable run-time, then nothing to do, since in this case
-- the gnat_argc/argv/envp variables are entirely suppressed.
elsif Configurable_Run_Time_On_Target then
null;
-- if no command line arguments on target, set dummy values
else
WBI (" gnat_argc = 0;");
WBI (" gnat_argv = 0;");
WBI (" gnat_envp = 0;");
end if;
if Opt.Default_Exit_Status /= 0
and then Bind_Main_Program
and then not Configurable_Run_Time_Mode
then
Set_String (" __gnat_set_exit_status (");
Set_Int (Opt.Default_Exit_Status);
Set_String (");");
Write_Statement_Buffer;
end if;
-- Initializes dynamic stack measurement if needed
if Dynamic_Stack_Measurement then
Set_String (" __gnat_stack_usage_initialize (");
Set_Int (Dynamic_Stack_Measurement_Array_Size);
Set_String (");");
Write_Statement_Buffer;
end if;
-- The __gnat_initialize routine is used only if we have a run-time
if not Suppress_Standard_Library_On_Target then
if not No_Main_Subprogram and then Bind_Main_Program then
WBI (" __gnat_initialize ((void *)SEH);");
else
WBI (" __gnat_initialize ((void *)0);");
end if;
end if;
WBI (" " & Ada_Init_Name.all & " ();");
if not No_Main_Subprogram then
WBI (" __gnat_break_start ();");
WBI (" ");
-- Output main program name
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
-- Main program is procedure case
if ALIs.Table (ALIs.First).Main_Program = Proc then
Set_String (" ");
Set_Main_Program_Name;
Set_String (" ();");
Write_Statement_Buffer;
-- Main program is function case
else -- ALIs.Table (ALIs_First).Main_Program = Func
Set_String (" result = ");
Set_Main_Program_Name;
Set_String (" ();");
Write_Statement_Buffer;
end if;
end if;
-- Call adafinal if finalization active
if not Cumulative_Restrictions.Set (No_Finalization) then
WBI (" ");
WBI (" system__standard_library__adafinal ();");
end if;
-- Outputs the dynamic stack measurement if needed
if Dynamic_Stack_Measurement then
WBI (" __gnat_stack_usage_output_results ();");
end if;
-- The finalize routine is used only if we have a run-time
if not Suppress_Standard_Library_On_Target then
WBI (" __gnat_finalize ();");
end if;
-- Case of main program is a function, so the value it returns
-- is the exit status in this case.
if ALIs.Table (ALIs.First).Main_Program = Func then
if Exit_Status_Supported_On_Target then
-- VMS must use Posix exit routine in order to get the effect
-- of a Unix compatible setting of the program exit status.
-- For all other systems, we use the standard exit routine.
if OpenVMS_On_Target then
WBI (" decc$__posix_exit (result);");
else
WBI (" exit (result);");
end if;
end if;
-- Case of main program is a procedure, in which case the exit
-- status is whatever was set by a Set_Exit call most recently
else
if Exit_Status_Supported_On_Target then
-- VMS must use Posix exit routine in order to get the effect
-- of a Unix compatible setting of the program exit status.
-- For all other systems, we use the standard exit routine.
if OpenVMS_On_Target then
WBI (" decc$__posix_exit (gnat_exit_status);");
else
WBI (" exit (gnat_exit_status);");
end if;
end if;
end if;
WBI ("}");
end Gen_Main_C;
------------------------------
-- Gen_Object_Files_Options --
------------------------------
procedure Gen_Object_Files_Options is
Lgnat : Natural;
-- This keeps track of the position in the sorted set of entries
-- in the Linker_Options table of where the first entry from an
-- internal file appears.
Linker_Option_List_Started : Boolean := False;
-- Set to True when "LINKER OPTION LIST" is displayed
procedure Write_Linker_Option;
-- Write binder info linker option
-------------------------
-- Write_Linker_Option --
-------------------------
procedure Write_Linker_Option is
Start : Natural;
Stop : Natural;
begin
-- Loop through string, breaking at null's
Start := 1;
while Start < Name_Len loop
-- Find null ending this section
Stop := Start + 1;
while Name_Buffer (Stop) /= ASCII.NUL
and then Stop <= Name_Len loop
Stop := Stop + 1;
end loop;
-- Process section if non-null
if Stop > Start then
if Output_Linker_Option_List then
if not Zero_Formatting then
if not Linker_Option_List_Started then
Linker_Option_List_Started := True;
Write_Eol;
Write_Str (" LINKER OPTION LIST");
Write_Eol;
Write_Eol;
end if;
Write_Str (" ");
end if;
Write_Str (Name_Buffer (Start .. Stop - 1));
Write_Eol;
end if;
Write_Info_Ada_C
(" -- ", "", Name_Buffer (Start .. Stop - 1));
end if;
Start := Stop + 1;
end loop;
end Write_Linker_Option;
-- Start of processing for Gen_Object_Files_Options
begin
WBI ("");
Write_Info_Ada_C ("-- ", "/* ", " BEGIN Object file/option list");
for E in Elab_Order.First .. Elab_Order.Last loop
-- If not spec that has an associated body, then generate a
-- comment giving the name of the corresponding object file.
if (not Units.Table (Elab_Order.Table (E)).SAL_Interface)
and then Units.Table (Elab_Order.Table (E)).Utype /= Is_Spec
then
Get_Name_String
(ALIs.Table
(Units.Table (Elab_Order.Table (E)).My_ALI).Ofile_Full_Name);
-- If the presence of an object file is necessary or if it
-- exists, then use it.
if not Hostparm.Exclude_Missing_Objects
or else
System.OS_Lib.Is_Regular_File (Name_Buffer (1 .. Name_Len))
then
Write_Info_Ada_C (" -- ", "", Name_Buffer (1 .. Name_Len));
if Output_Object_List then
Write_Str (Name_Buffer (1 .. Name_Len));
Write_Eol;
end if;
-- Don't link with the shared library on VMS if an internal
-- filename object is seen. Multiply defined symbols will
-- result.
if OpenVMS_On_Target
and then Is_Internal_File_Name
(ALIs.Table
(Units.Table (Elab_Order.Table (E)).My_ALI).Sfile)
then
-- Special case for g-trasym.obj, which is not included
-- in libgnat.
Get_Name_String (ALIs.Table
(Units.Table (Elab_Order.Table (E)).My_ALI).Sfile);
if Name_Buffer (1 .. 8) /= "g-trasym" then
Opt.Shared_Libgnat := False;
end if;
end if;
end if;
end if;
end loop;
-- Add a "-Ldir" for each directory in the object path
for J in 1 .. Nb_Dir_In_Obj_Search_Path loop
declare
Dir : constant String_Ptr := Dir_In_Obj_Search_Path (J);
begin
Name_Len := 0;
Add_Str_To_Name_Buffer ("-L");
Add_Str_To_Name_Buffer (Dir.all);
Write_Linker_Option;
end;
end loop;
-- Sort linker options
-- This sort accomplishes two important purposes:
-- a) All application files are sorted to the front, and all
-- GNAT internal files are sorted to the end. This results
-- in a well defined dividing line between the two sets of
-- files, for the purpose of inserting certain standard
-- library references into the linker arguments list.
-- b) Given two different units, we sort the linker options so
-- that those from a unit earlier in the elaboration order
-- comes later in the list. This is a heuristic designed
-- to create a more friendly order of linker options when
-- the operations appear in separate units. The idea is that
-- if unit A must be elaborated before unit B, then it is
-- more likely that B references libraries included by A,
-- than vice versa, so we want the libraries included by
-- A to come after the libraries included by B.
-- These two criteria are implemented by function Lt_Linker_Option.
-- Note that a special case of b) is that specs are elaborated before
-- bodies, so linker options from specs come after linker options
-- for bodies, and again, the assumption is that libraries used by
-- the body are more likely to reference libraries used by the spec,
-- than vice versa.
Sort
(Linker_Options.Last,
Move_Linker_Option'Access,
Lt_Linker_Option'Access);
-- Write user linker options, i.e. the set of linker options that
-- come from all files other than GNAT internal files, Lgnat is
-- left set to point to the first entry from a GNAT internal file,
-- or past the end of the entriers if there are no internal files.
Lgnat := Linker_Options.Last + 1;
for J in 1 .. Linker_Options.Last loop
if not Linker_Options.Table (J).Internal_File then
Get_Name_String (Linker_Options.Table (J).Name);
Write_Linker_Option;
else
Lgnat := J;
exit;
end if;
end loop;
-- Now we insert standard linker options that must appear after the
-- entries from user files, and before the entries from GNAT run-time
-- files. The reason for this decision is that libraries referenced
-- by internal routines may reference these standard library entries.
-- Note that we do not insert anything when pragma No_Run_Time has been
-- specified or when the standard libraries are not to be used,
-- otherwise on some platforms, such as VMS, we may get duplicate
-- symbols when linking.
if not (Opt.No_Run_Time_Mode or else Opt.No_Stdlib) then
Name_Len := 0;
if Opt.Shared_Libgnat then
Add_Str_To_Name_Buffer ("-shared");
else
Add_Str_To_Name_Buffer ("-static");
end if;
-- Write directly to avoid -K output (why???)
Write_Info_Ada_C (" -- ", "", Name_Buffer (1 .. Name_Len));
if With_DECGNAT then
Name_Len := 0;
if Opt.Shared_Libgnat then
Add_Str_To_Name_Buffer (Shared_Lib ("decgnat"));
else
Add_Str_To_Name_Buffer ("-ldecgnat");
end if;
Write_Linker_Option;
end if;
if With_GNARL then
Name_Len := 0;
if Opt.Shared_Libgnat then
Add_Str_To_Name_Buffer (Shared_Lib ("gnarl"));
else
Add_Str_To_Name_Buffer ("-lgnarl");
end if;
Write_Linker_Option;
end if;
Name_Len := 0;
if Opt.Shared_Libgnat then
Add_Str_To_Name_Buffer (Shared_Lib ("gnat"));
else
Add_Str_To_Name_Buffer ("-lgnat");
end if;
Write_Linker_Option;
end if;
-- Write linker options from all internal files
for J in Lgnat .. Linker_Options.Last loop
Get_Name_String (Linker_Options.Table (J).Name);
Write_Linker_Option;
end loop;
if Output_Linker_Option_List and then not Zero_Formatting then
Write_Eol;
end if;
if Ada_Bind_File then
WBI ("-- END Object file/option list ");
else
WBI (" END Object file/option list */");
end if;
end Gen_Object_Files_Options;
---------------------
-- Gen_Output_File --
---------------------
procedure Gen_Output_File (Filename : String) is
begin
-- Acquire settings for Interrupt_State pragmas
Set_IS_Pragma_Table;
-- Acquire settings for Priority_Specific_Dispatching pragma
Set_PSD_Pragma_Table;
-- Override Ada_Bind_File and Bind_Main_Program for VMs since
-- JGNAT only supports Ada code, and the main program is already
-- generated by the compiler.
if VM_Target /= No_VM then
Ada_Bind_File := True;
if VM_Target = JVM_Target then
Bind_Main_Program := False;
end if;
end if;
-- Override time slice value if -T switch is set
if Time_Slice_Set then
ALIs.Table (ALIs.First).Time_Slice_Value := Opt.Time_Slice_Value;
end if;
-- Count number of elaboration calls
for E in Elab_Order.First .. Elab_Order.Last loop
if Units.Table (Elab_Order.Table (E)).No_Elab then
null;
else
Num_Elab_Calls := Num_Elab_Calls + 1;
end if;
end loop;
-- Generate output file in appropriate language
Check_System_Restrictions_Used;
if Ada_Bind_File then
Gen_Output_File_Ada (Filename);
else
Gen_Output_File_C (Filename);
end if;
end Gen_Output_File;
-------------------------
-- Gen_Output_File_Ada --
-------------------------
procedure Gen_Output_File_Ada (Filename : String) is
Bfiles : Name_Id;
-- Name of generated bind file (spec)
Bfileb : Name_Id;
-- Name of generated bind file (body)
Ada_Main : constant String := Get_Ada_Main_Name;
-- Name to be used for generated Ada main program. See the body of
-- function Get_Ada_Main_Name for details on the form of the name.
begin
-- Create spec first
Create_Binder_Output (Filename, 's', Bfiles);
-- We always compile the binder file in Ada 95 mode so that we properly
-- handle use of Ada 2005 keywords as identifiers in Ada 95 mode. None
-- of the Ada 2005 constructs are needed by the binder file.
WBI ("pragma Ada_95;");
-- If we are operating in Restrictions (No_Exception_Handlers) mode,
-- then we need to make sure that the binder program is compiled with
-- the same restriction, so that no exception tables are generated.
if Cumulative_Restrictions.Set (No_Exception_Handlers) then
WBI ("pragma Restrictions (No_Exception_Handlers);");
end if;
-- Same processing for Restrictions (No_Exception_Propagation)
if Cumulative_Restrictions.Set (No_Exception_Propagation) then
WBI ("pragma Restrictions (No_Exception_Propagation);");
end if;
-- Same processing for pragma No_Run_Time
if No_Run_Time_Mode then
WBI ("pragma No_Run_Time;");
end if;
-- Generate with of System so we can reference System.Address
WBI ("with System;");
-- Generate with of System.Initialize_Scalars if active
if Initialize_Scalars_Used then
WBI ("with System.Scalar_Values;");
end if;
-- Generate with of System.Secondary_Stack if active
if Sec_Stack_Used and then Default_Sec_Stack_Size /= -1 then
WBI ("with System.Secondary_Stack;");
end if;
Resolve_Binder_Options;
if VM_Target /= No_VM then
if not Suppress_Standard_Library_On_Target then
-- Usually, adafinal is called using a pragma Import C. Since
-- Import C doesn't have the same semantics for JGNAT, we use
-- standard Ada.
WBI ("with System.Standard_Library;");
end if;
end if;
WBI ("package " & Ada_Main & " is");
WBI (" pragma Warnings (Off);");
-- Main program case
if Bind_Main_Program then
if VM_Target = No_VM then
-- Generate argc/argv stuff unless suppressed
if Command_Line_Args_On_Target
or not Configurable_Run_Time_On_Target
then
WBI ("");
WBI (" gnat_argc : Integer;");
WBI (" gnat_argv : System.Address;");
WBI (" gnat_envp : System.Address;");
-- If the standard library is not suppressed, these variables
-- are in the runtime data area for easy access from the
-- runtime.
if not Suppress_Standard_Library_On_Target then
WBI ("");
WBI (" pragma Import (C, gnat_argc);");
WBI (" pragma Import (C, gnat_argv);");
WBI (" pragma Import (C, gnat_envp);");
end if;
end if;
-- Define exit status. Again in normal mode, this is in the
-- run-time library, and is initialized there, but in the
-- configurable runtime case, the variable is declared and
-- initialized in this file.
WBI ("");
if Configurable_Run_Time_Mode then
if Exit_Status_Supported_On_Target then
WBI (" gnat_exit_status : Integer := 0;");
end if;
else
WBI (" gnat_exit_status : Integer;");
WBI (" pragma Import (C, gnat_exit_status);");
end if;
end if;
-- Generate the GNAT_Version and Ada_Main_Program_Name info only for
-- the main program. Otherwise, it can lead under some circumstances
-- to a symbol duplication during the link (for instance when a C
-- program uses two Ada libraries). Also zero terminate the string
-- so that its end can be found reliably at run time.
WBI ("");
WBI (" GNAT_Version : constant String :=");
WBI (" ""GNAT Version: " &
Gnat_Version_String &
""" & ASCII.NUL;");
WBI (" pragma Export (C, GNAT_Version, ""__gnat_version"");");
WBI ("");
Set_String (" Ada_Main_Program_Name : constant String := """);
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
if VM_Target = No_VM then
Set_Main_Program_Name;
Set_String (""" & ASCII.NUL;");
else
Set_String (Name_Buffer (1 .. Name_Len - 2) & """;");
end if;
Write_Statement_Buffer;
WBI
(" pragma Export (C, Ada_Main_Program_Name, " &
"""__gnat_ada_main_program_name"");");
end if;
if not Cumulative_Restrictions.Set (No_Finalization) then
WBI ("");
WBI (" procedure " & Ada_Final_Name.all & ";");
WBI (" pragma Export (C, " & Ada_Final_Name.all & ", """ &
Ada_Final_Name.all & """);");
end if;
WBI ("");
WBI (" procedure " & Ada_Init_Name.all & ";");
WBI (" pragma Export (C, " & Ada_Init_Name.all & ", """ &
Ada_Init_Name.all & """);");
-- If -a has been specified use pragma Linker_Constructor for the init
-- procedure. No need to use a similar pragma for the final procedure as
-- global finalization will occur when the executable finishes execution
-- and for plugins (shared stand-alone libraries that can be
-- "unloaded"), finalization should not occur automatically, otherwise
-- the main executable may not continue to work properly.
if Use_Pragma_Linker_Constructor then
WBI (" pragma Linker_Constructor (" & Ada_Init_Name.all & ");");
end if;
if Bind_Main_Program and then VM_Target = No_VM then
-- If we have the standard library, then Break_Start is defined
-- there, but when the standard library is suppressed, Break_Start
-- is defined here.
WBI ("");
WBI (" procedure Break_Start;");
if Suppress_Standard_Library_On_Target then
WBI (" pragma Export (C, Break_Start, ""__gnat_break_start"");");
else
WBI (" pragma Import (C, Break_Start, ""__gnat_break_start"");");
end if;
WBI ("");
if Exit_Status_Supported_On_Target then
Set_String (" function ");
else
Set_String (" procedure ");
end if;
Set_String (Get_Main_Name);
-- Generate argument list if present
if Command_Line_Args_On_Target then
Write_Statement_Buffer;
WBI (" (argc : Integer;");
WBI (" argv : System.Address;");
Set_String
(" envp : System.Address)");
if Exit_Status_Supported_On_Target then
Write_Statement_Buffer;
WBI (" return Integer;");
else
Write_Statement_Buffer (";");
end if;
else
if Exit_Status_Supported_On_Target then
Write_Statement_Buffer (" return Integer;");
else
Write_Statement_Buffer (";");
end if;
end if;
WBI (" pragma Export (C, " & Get_Main_Name & ", """ &
Get_Main_Name & """);");
end if;
Gen_Versions_Ada;
Gen_Elab_Order_Ada;
-- Spec is complete
WBI ("");
WBI ("end " & Ada_Main & ";");
Close_Binder_Output;
-- Prepare to write body
Create_Binder_Output (Filename, 'b', Bfileb);
-- We always compile the binder file in Ada 95 mode so that we properly
-- handle use of Ada 2005 keywords as identifiers in Ada 95 mode. None
-- of the Ada 2005 constructs are needed by the binder file.
WBI ("pragma Ada_95;");
-- Output Source_File_Name pragmas which look like
-- pragma Source_File_Name (Ada_Main, Spec_File_Name => "sss");
-- pragma Source_File_Name (Ada_Main, Body_File_Name => "bbb");
-- where sss/bbb are the spec/body file names respectively
Get_Name_String (Bfiles);
Name_Buffer (Name_Len + 1 .. Name_Len + 3) := """);";
WBI ("pragma Source_File_Name (" &
Ada_Main &
", Spec_File_Name => """ &
Name_Buffer (1 .. Name_Len + 3));
Get_Name_String (Bfileb);
Name_Buffer (Name_Len + 1 .. Name_Len + 3) := """);";
WBI ("pragma Source_File_Name (" &
Ada_Main &
", Body_File_Name => """ &
Name_Buffer (1 .. Name_Len + 3));
-- Generate with of System.Restrictions to initialize
-- Run_Time_Restrictions.
if System_Restrictions_Used
and not Suppress_Standard_Library_On_Target
then
WBI ("");
WBI ("with System.Restrictions;");
end if;
WBI ("");
WBI ("package body " & Ada_Main & " is");
WBI (" pragma Warnings (Off);");
-- Import the finalization procedure only if finalization active
if not Cumulative_Restrictions.Set (No_Finalization) then
-- In the Java case, pragma Import C cannot be used, so the
-- standard Ada constructs will be used instead.
if VM_Target = No_VM then
WBI ("");
WBI (" procedure Do_Finalize;");
WBI
(" pragma Import (C, Do_Finalize, " &
"""system__standard_library__adafinal"");");
WBI ("");
end if;
end if;
if not Suppress_Standard_Library_On_Target then
-- Generate Priority_Specific_Dispatching pragma string
Set_String
(" Local_Priority_Specific_Dispatching : constant String := """);
for J in 0 .. PSD_Pragma_Settings.Last loop
Set_Char (PSD_Pragma_Settings.Table (J));
end loop;
Set_String (""";");
Write_Statement_Buffer;
-- Generate Interrupt_State pragma string
Set_String (" Local_Interrupt_States : constant String := """);
for J in 0 .. IS_Pragma_Settings.Last loop
Set_Char (IS_Pragma_Settings.Table (J));
end loop;
Set_String (""";");
Write_Statement_Buffer;
WBI ("");
end if;
Gen_Adainit_Ada;
-- Generate the adafinal routine unless there is no finalization to do
if not Cumulative_Restrictions.Set (No_Finalization) then
Gen_Adafinal_Ada;
end if;
if Bind_Main_Program and then VM_Target = No_VM then
-- When suppressing the standard library then generate dummy body
-- for Break_Start
if Suppress_Standard_Library_On_Target then
WBI ("");
WBI (" procedure Break_Start is");
WBI (" begin");
WBI (" null;");
WBI (" end;");
end if;
Gen_Main_Ada;
end if;
-- Output object file list and the Ada body is complete
Gen_Object_Files_Options;
WBI ("");
WBI ("end " & Ada_Main & ";");
Close_Binder_Output;
end Gen_Output_File_Ada;
-----------------------
-- Gen_Output_File_C --
-----------------------
procedure Gen_Output_File_C (Filename : String) is
Bfile : Name_Id;
pragma Warnings (Off, Bfile);
-- Name of generated bind file (not referenced)
begin
Create_Binder_Output (Filename, 'c', Bfile);
Resolve_Binder_Options;
WBI ("extern void " & Ada_Final_Name.all & " (void);");
-- If -a has been specified use __attribute__((constructor)) for the
-- init procedure. No need to use a similar featute for the final
-- procedure as global finalization will occur when the executable
-- finishes execution and for plugins (shared stand-alone libraries that
-- can be "unloaded"), finalization should not occur automatically,
-- otherwise the main executable may not continue to work properly.
if Use_Pragma_Linker_Constructor then
WBI ("extern void " & Ada_Init_Name.all &
" (void) __attribute__((constructor));");
else
WBI ("extern void " & Ada_Init_Name.all & " (void);");
end if;
WBI ("extern void system__standard_library__adafinal (void);");
if not No_Main_Subprogram then
Set_String ("extern ");
if Exit_Status_Supported_On_Target then
Set_String ("int");
else
Set_String ("void");
end if;
Set_String (" main ");
if Command_Line_Args_On_Target then
Write_Statement_Buffer ("(int, char **, char **);");
else
Write_Statement_Buffer ("(void);");
end if;
if OpenVMS_On_Target then
WBI ("extern void decc$__posix_exit (int);");
else
WBI ("extern void exit (int);");
end if;
WBI ("extern void __gnat_break_start (void);");
Set_String ("extern ");
if ALIs.Table (ALIs.First).Main_Program = Proc then
Set_String ("void ");
else
Set_String ("int ");
end if;
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
Set_Main_Program_Name;
Set_String (" (void);");
Write_Statement_Buffer;
end if;
if not Suppress_Standard_Library_On_Target then
WBI ("extern void __gnat_initialize (void *);");
WBI ("extern void __gnat_finalize (void);");
WBI ("extern void __gnat_install_handler (void);");
end if;
if Dynamic_Stack_Measurement then
WBI ("");
WBI ("extern void __gnat_stack_usage_output_results (void);");
WBI ("extern void __gnat_stack_usage_initialize (int size);");
end if;
-- Initialize stack limit for the environment task if the stack
-- check method is stack limit and stack check is enabled.
if Stack_Check_Limits_On_Target
and then (Stack_Check_Default_On_Target or Stack_Check_Switch_Set)
then
WBI ("");
WBI ("extern void __gnat_initialize_stack_limit (void);");
end if;
WBI ("");
Gen_Elab_Defs_C;
-- Imported variables used only when we have a runtime
if not Suppress_Standard_Library_On_Target then
-- Track elaboration/finalization phase
WBI ("extern int __gnat_handler_installed;");
WBI ("");
-- Track feature enable/disable on VMS
if OpenVMS_On_Target then
WBI ("extern int __gnat_features_set;");
WBI ("");
end if;
end if;
-- Write argv/argc exit status stuff if main program case
if Bind_Main_Program then
-- First deal with argc/argv/envp. In the normal case they
-- are in the run-time library.
if not Configurable_Run_Time_On_Target then
WBI ("extern int gnat_argc;");
WBI ("extern char **gnat_argv;");
WBI ("extern char **gnat_envp;");
-- If configurable run time and no command line args, then the
-- generation of these variables is entirely suppressed.
elsif not Command_Line_Args_On_Target then
null;
-- Otherwise, in the configurable run-time case they are right in
-- the binder file.
else
WBI ("int gnat_argc;");
WBI ("char **gnat_argv;");
WBI ("char **gnat_envp;");
end if;
-- Similarly deal with exit status
if not Configurable_Run_Time_On_Target then
WBI ("extern int gnat_exit_status;");
-- If configurable run time and no exit status on target, then
-- the generation of this variables is entirely suppressed.
elsif not Exit_Status_Supported_On_Target then
null;
-- Otherwise, in the configurable run-time case this variable is
-- right in the binder file, and initialized to zero there.
else
WBI ("int gnat_exit_status = 0;");
end if;
WBI ("");
end if;
-- When suppressing the standard library, the __gnat_break_start
-- routine (for the debugger to get initial control) is defined in
-- this file.
if Suppress_Standard_Library_On_Target then
WBI ("");
WBI ("void __gnat_break_start (void) {}");
end if;
-- Generate the __gnat_version and __gnat_ada_main_program_name info
-- only for the main program. Otherwise, it can lead under some
-- circumstances to a symbol duplication during the link (for instance
-- when a C program uses 2 Ada libraries)
if Bind_Main_Program then
WBI ("");
WBI ("char __gnat_version[] = ""GNAT Version: " &
Gnat_Version_String & """;");
Set_String ("char __gnat_ada_main_program_name[] = """);
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
Set_Main_Program_Name;
Set_String (""";");
Write_Statement_Buffer;
end if;
-- Generate the adafinal routine. In no runtime mode, this is
-- not needed, since there is no finalization to do.
if not Cumulative_Restrictions.Set (No_Finalization) then
Gen_Adafinal_C;
end if;
Gen_Adainit_C;
-- Main is only present for Ada main case
if Bind_Main_Program then
Gen_Main_C;
end if;
-- Generate versions, elaboration order, list of object files
Gen_Versions_C;
Gen_Elab_Order_C;
Gen_Object_Files_Options;
-- C binder output is complete
Close_Binder_Output;
end Gen_Output_File_C;
--------------------------
-- Gen_Restrictions_Ada --
--------------------------
procedure Gen_Restrictions_Ada is
Count : Integer;
begin
if Suppress_Standard_Library_On_Target
or not System_Restrictions_Used
then
return;
end if;
WBI (" System.Restrictions.Run_Time_Restrictions :=");
WBI (" (Set =>");
Set_String (" (");
Count := 0;
for J in Cumulative_Restrictions.Set'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Set'Last)
loop
Set_Boolean (Cumulative_Restrictions.Set (J));
Set_String (", ");
Count := Count + 1;
if Count = 8 then
Write_Statement_Buffer;
Set_String (" ");
Count := 0;
end if;
end loop;
Set_Boolean
(Cumulative_Restrictions.Set (Cumulative_Restrictions.Set'Last));
Set_String ("),");
Write_Statement_Buffer;
Set_String (" Value => (");
for J in Cumulative_Restrictions.Value'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Value'Last)
loop
Set_Int (Int (Cumulative_Restrictions.Value (J)));
Set_String (", ");
end loop;
Set_Int (Int (Cumulative_Restrictions.Value
(Cumulative_Restrictions.Value'Last)));
Set_String ("),");
Write_Statement_Buffer;
WBI (" Violated =>");
Set_String (" (");
Count := 0;
for J in Cumulative_Restrictions.Violated'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Violated'Last)
loop
Set_Boolean (Cumulative_Restrictions.Violated (J));
Set_String (", ");
Count := Count + 1;
if Count = 8 then
Write_Statement_Buffer;
Set_String (" ");
Count := 0;
end if;
end loop;
Set_Boolean (Cumulative_Restrictions.Violated
(Cumulative_Restrictions.Violated'Last));
Set_String ("),");
Write_Statement_Buffer;
Set_String (" Count => (");
for J in Cumulative_Restrictions.Count'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Count'Last)
loop
Set_Int (Int (Cumulative_Restrictions.Count (J)));
Set_String (", ");
end loop;
Set_Int (Int (Cumulative_Restrictions.Count
(Cumulative_Restrictions.Count'Last)));
Set_String ("),");
Write_Statement_Buffer;
Set_String (" Unknown => (");
for J in Cumulative_Restrictions.Unknown'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Unknown'Last)
loop
Set_Boolean (Cumulative_Restrictions.Unknown (J));
Set_String (", ");
end loop;
Set_Boolean
(Cumulative_Restrictions.Unknown
(Cumulative_Restrictions.Unknown'Last));
Set_String ("));");
Write_Statement_Buffer;
end Gen_Restrictions_Ada;
------------------------
-- Gen_Restrictions_C --
------------------------
procedure Gen_Restrictions_C is
begin
if Suppress_Standard_Library_On_Target
or not System_Restrictions_Used
then
return;
end if;
WBI (" typedef struct {");
Set_String (" char set [");
Set_Int (Cumulative_Restrictions.Set'Length);
Set_String ("];");
Write_Statement_Buffer;
Set_String (" int value [");
Set_Int (Cumulative_Restrictions.Value'Length);
Set_String ("];");
Write_Statement_Buffer;
Set_String (" char violated [");
Set_Int (Cumulative_Restrictions.Violated'Length);
Set_String ("];");
Write_Statement_Buffer;
Set_String (" int count [");
Set_Int (Cumulative_Restrictions.Count'Length);
Set_String ("];");
Write_Statement_Buffer;
Set_String (" char unknown [");
Set_Int (Cumulative_Restrictions.Unknown'Length);
Set_String ("];");
Write_Statement_Buffer;
WBI (" } restrictions;");
WBI (" extern restrictions " &
"system__restrictions__run_time_restrictions;");
WBI (" restrictions r = {");
Set_String (" {");
for J in Cumulative_Restrictions.Set'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Set'Last)
loop
Set_Int (Boolean'Pos (Cumulative_Restrictions.Set (J)));
Set_String (", ");
end loop;
Set_Int (Boolean'Pos
(Cumulative_Restrictions.Set (Cumulative_Restrictions.Set'Last)));
Set_String ("},");
Write_Statement_Buffer;
Set_String (" {");
for J in Cumulative_Restrictions.Value'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Value'Last)
loop
Set_Int (Int (Cumulative_Restrictions.Value (J)));
Set_String (", ");
end loop;
Set_Int (Int (Cumulative_Restrictions.Value
(Cumulative_Restrictions.Value'Last)));
Set_String ("},");
Write_Statement_Buffer;
Set_String (" {");
for J in Cumulative_Restrictions.Violated'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Violated'Last)
loop
Set_Int (Boolean'Pos (Cumulative_Restrictions.Violated (J)));
Set_String (", ");
end loop;
Set_Int (Boolean'Pos (Cumulative_Restrictions.Violated
(Cumulative_Restrictions.Violated'Last)));
Set_String ("},");
Write_Statement_Buffer;
Set_String (" {");
for J in Cumulative_Restrictions.Count'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Count'Last)
loop
Set_Int (Int (Cumulative_Restrictions.Count (J)));
Set_String (", ");
end loop;
Set_Int (Int (Cumulative_Restrictions.Count
(Cumulative_Restrictions.Count'Last)));
Set_String ("},");
Write_Statement_Buffer;
Set_String (" {");
for J in Cumulative_Restrictions.Unknown'First ..
Restriction_Id'Pred (Cumulative_Restrictions.Unknown'Last)
loop
Set_Int (Boolean'Pos (Cumulative_Restrictions.Unknown (J)));
Set_String (", ");
end loop;
Set_Int (Boolean'Pos (Cumulative_Restrictions.Unknown
(Cumulative_Restrictions.Unknown'Last)));
Set_String ("}};");
Write_Statement_Buffer;
WBI (" system__restrictions__run_time_restrictions = r;");
end Gen_Restrictions_C;
----------------------
-- Gen_Versions_Ada --
----------------------
-- This routine generates two sets of lines. The first set has the form:
-- unnnnn : constant Integer := 16#hhhhhhhh#;
-- The second set has the form
-- pragma Export (C, unnnnn, unam);
-- for each unit, where unam is the unit name suffixed by either B or
-- S for body or spec, with dots replaced by double underscores, and
-- hhhhhhhh is the version number, and nnnnn is a 5-digits serial number.
procedure Gen_Versions_Ada is
Ubuf : String (1 .. 6) := "u00000";
procedure Increment_Ubuf;
-- Little procedure to increment the serial number
procedure Increment_Ubuf is
begin
for J in reverse Ubuf'Range loop
Ubuf (J) := Character'Succ (Ubuf (J));
exit when Ubuf (J) <= '9';
Ubuf (J) := '0';
end loop;
end Increment_Ubuf;
-- Start of processing for Gen_Versions_Ada
begin
if Bind_For_Library then
-- When building libraries, the version number of each unit can
-- not be computed, since the binder does not know the full list
-- of units. Therefore, the 'Version and 'Body_Version
-- attributes cannot supported in this case.
return;
end if;
WBI ("");
WBI (" type Version_32 is mod 2 ** 32;");
for U in Units.First .. Units.Last loop
Increment_Ubuf;
WBI (" " & Ubuf & " : constant Version_32 := 16#" &
Units.Table (U).Version & "#;");
end loop;
WBI ("");
Ubuf := "u00000";
for U in Units.First .. Units.Last loop
Increment_Ubuf;
Set_String (" pragma Export (C, ");
Set_String (Ubuf);
Set_String (", """);
Get_Name_String (Units.Table (U).Uname);
for K in 1 .. Name_Len loop
if Name_Buffer (K) = '.' then
Set_Char ('_');
Set_Char ('_');
elsif Name_Buffer (K) = '%' then
exit;
else
Set_Char (Name_Buffer (K));
end if;
end loop;
if Name_Buffer (Name_Len) = 's' then
Set_Char ('S');
else
Set_Char ('B');
end if;
Set_String (""");");
Write_Statement_Buffer;
end loop;
end Gen_Versions_Ada;
--------------------
-- Gen_Versions_C --
--------------------
-- This routine generates a line of the form:
-- unsigned unam = 0xhhhhhhhh;
-- for each unit, where unam is the unit name suffixed by either B or
-- S for body or spec, with dots replaced by double underscores.
procedure Gen_Versions_C is
begin
if Bind_For_Library then
-- When building libraries, the version number of each unit can
-- not be computed, since the binder does not know the full list
-- of units. Therefore, the 'Version and 'Body_Version
-- attributes cannot supported.
return;
end if;
for U in Units.First .. Units.Last loop
Set_String ("unsigned ");
Get_Name_String (Units.Table (U).Uname);
for K in 1 .. Name_Len loop
if Name_Buffer (K) = '.' then
Set_String ("__");
elsif Name_Buffer (K) = '%' then
exit;
else
Set_Char (Name_Buffer (K));
end if;
end loop;
if Name_Buffer (Name_Len) = 's' then
Set_Char ('S');
else
Set_Char ('B');
end if;
Set_String (" = 0x");
Set_String (Units.Table (U).Version);
Set_Char (';');
Write_Statement_Buffer;
end loop;
end Gen_Versions_C;
------------------------
-- Get_Main_Unit_Name --
------------------------
function Get_Main_Unit_Name (S : String) return String is
Result : String := S;
begin
for J in S'Range loop
if Result (J) = '.' then
Result (J) := '_';
end if;
end loop;
return Result;
end Get_Main_Unit_Name;
-----------------------
-- Get_Ada_Main_Name --
-----------------------
function Get_Ada_Main_Name return String is
Suffix : constant String := "_00";
Name : String (1 .. Opt.Ada_Main_Name.all'Length + Suffix'Length) :=
Opt.Ada_Main_Name.all & Suffix;
Nlen : Natural;
begin
-- The main program generated by JGNAT expects a package called
-- ada_<main procedure>.
if VM_Target /= No_VM then
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
return "ada_" & Get_Main_Unit_Name (Name_Buffer (1 .. Name_Len - 2));
end if;
-- This loop tries the following possibilities in order
-- <Ada_Main>
-- <Ada_Main>_01
-- <Ada_Main>_02
-- ..
-- <Ada_Main>_99
-- where <Ada_Main> is equal to Opt.Ada_Main_Name. By default,
-- it is set to 'ada_main'.
for J in 0 .. 99 loop
if J = 0 then
Nlen := Name'Length - Suffix'Length;
else
Nlen := Name'Length;
Name (Name'Last) := Character'Val (J mod 10 + Character'Pos ('0'));
Name (Name'Last - 1) :=
Character'Val (J / 10 + Character'Pos ('0'));
end if;
for K in ALIs.First .. ALIs.Last loop
for L in ALIs.Table (K).First_Unit .. ALIs.Table (K).Last_Unit loop
-- Get unit name, removing %b or %e at end
Get_Name_String (Units.Table (L).Uname);
Name_Len := Name_Len - 2;
if Name_Buffer (1 .. Name_Len) = Name (1 .. Nlen) then
goto Continue;
end if;
end loop;
end loop;
return Name (1 .. Nlen);
<<Continue>>
null;
end loop;
-- If we fall through, just use a peculiar unlikely name
return ("Qwertyuiop");
end Get_Ada_Main_Name;
-------------------
-- Get_Main_Name --
-------------------
function Get_Main_Name return String is
begin
-- Explicit name given with -M switch
if Bind_Alternate_Main_Name then
return Alternate_Main_Name.all;
-- Case of main program name to be used directly
elsif Use_Ada_Main_Program_Name_On_Target then
-- Get main program name
Get_Name_String (Units.Table (First_Unit_Entry).Uname);
-- If this is a child name, return only the name of the child,
-- since we can't have dots in a nested program name. Note that
-- we do not include the %b at the end of the unit name.
for J in reverse 1 .. Name_Len - 2 loop
if J = 1 or else Name_Buffer (J - 1) = '.' then
return Name_Buffer (J .. Name_Len - 2);
end if;
end loop;
raise Program_Error; -- impossible exit
-- Case where "main" is to be used as default
else
return "main";
end if;
end Get_Main_Name;
---------------------
-- Get_WC_Encoding --
---------------------
function Get_WC_Encoding return Character is
begin
-- If encoding method specified by -W switch, then return it
if Wide_Character_Encoding_Method_Specified then
return WC_Encoding_Letters (Wide_Character_Encoding_Method);
-- If no main program, and not specified, set brackets, we really have
-- no better choice. If some other encoding is required when there is
-- no main, it must be set explicitly using -Wx.
-- Note: if the ALI file always passed the wide character encoding
-- of every file, then we could use the encoding of the initial
-- specified file, but this information is passed only for potential
-- main programs. We could fix this sometime, but it is a very minor
-- point (wide character default encoding for [Wide_[Wide_]Text_IO
-- when there is no main program).
elsif No_Main_Subprogram then
return 'b';
-- Otherwise if there is a main program, take encoding from it
else
return ALIs.Table (ALIs.First).WC_Encoding;
end if;
end Get_WC_Encoding;
----------------------
-- Lt_Linker_Option --
----------------------
function Lt_Linker_Option (Op1, Op2 : Natural) return Boolean is
begin
-- Sort internal files last
if Linker_Options.Table (Op1).Internal_File
/=
Linker_Options.Table (Op2).Internal_File
then
-- Note: following test uses False < True
return Linker_Options.Table (Op1).Internal_File
<
Linker_Options.Table (Op2).Internal_File;
-- If both internal or both non-internal, sort according to the
-- elaboration position. A unit that is elaborated later should
-- come earlier in the linker options list.
else
return Units.Table (Linker_Options.Table (Op1).Unit).Elab_Position
>
Units.Table (Linker_Options.Table (Op2).Unit).Elab_Position;
end if;
end Lt_Linker_Option;
------------------------
-- Move_Linker_Option --
------------------------
procedure Move_Linker_Option (From : Natural; To : Natural) is
begin
Linker_Options.Table (To) := Linker_Options.Table (From);
end Move_Linker_Option;
----------------------------
-- Resolve_Binder_Options --
----------------------------
procedure Resolve_Binder_Options is
begin
for E in Elab_Order.First .. Elab_Order.Last loop
Get_Name_String (Units.Table (Elab_Order.Table (E)).Uname);
-- This is not a perfect approach, but is the current protocol
-- between the run-time and the binder to indicate that tasking
-- is used: system.os_interface should always be used by any
-- tasking application.
if Name_Buffer (1 .. 19) = "system.os_interface" then
With_GNARL := True;
end if;
-- Ditto for declib and the "dec" package
if OpenVMS_On_Target and then Name_Buffer (1 .. 5) = "dec%s" then
With_DECGNAT := True;
end if;
end loop;
end Resolve_Binder_Options;
-----------------
-- Set_Boolean --
-----------------
procedure Set_Boolean (B : Boolean) is
True_Str : constant String := "True";
False_Str : constant String := "False";
begin
if B then
Statement_Buffer (Last + 1 .. Last + True_Str'Length) := True_Str;
Last := Last + True_Str'Length;
else
Statement_Buffer (Last + 1 .. Last + False_Str'Length) := False_Str;
Last := Last + False_Str'Length;
end if;
end Set_Boolean;
--------------
-- Set_Char --
--------------
procedure Set_Char (C : Character) is
begin
Last := Last + 1;
Statement_Buffer (Last) := C;
end Set_Char;
-------------
-- Set_Int --
-------------
procedure Set_Int (N : Int) is
begin
if N < 0 then
Set_String ("-");
Set_Int (-N);
else
if N > 9 then
Set_Int (N / 10);
end if;
Last := Last + 1;
Statement_Buffer (Last) :=
Character'Val (N mod 10 + Character'Pos ('0'));
end if;
end Set_Int;
-------------------------
-- Set_IS_Pragma_Table --
-------------------------
procedure Set_IS_Pragma_Table is
begin
for F in ALIs.First .. ALIs.Last loop
for K in ALIs.Table (F).First_Interrupt_State ..
ALIs.Table (F).Last_Interrupt_State
loop
declare
Inum : constant Int :=
Interrupt_States.Table (K).Interrupt_Id;
Stat : constant Character :=
Interrupt_States.Table (K).Interrupt_State;
begin
while IS_Pragma_Settings.Last < Inum loop
IS_Pragma_Settings.Append ('n');
end loop;
IS_Pragma_Settings.Table (Inum) := Stat;
end;
end loop;
end loop;
end Set_IS_Pragma_Table;
---------------------------
-- Set_Main_Program_Name --
---------------------------
procedure Set_Main_Program_Name is
begin
-- Note that name has %b on the end which we ignore
-- First we output the initial _ada_ since we know that the main
-- program is a library level subprogram.
Set_String ("_ada_");
-- Copy name, changing dots to double underscores
for J in 1 .. Name_Len - 2 loop
if Name_Buffer (J) = '.' then
Set_String ("__");
else
Set_Char (Name_Buffer (J));
end if;
end loop;
end Set_Main_Program_Name;
---------------------
-- Set_Name_Buffer --
---------------------
procedure Set_Name_Buffer is
begin
for J in 1 .. Name_Len loop
Set_Char (Name_Buffer (J));
end loop;
end Set_Name_Buffer;
-------------------------
-- Set_PSD_Pragma_Table --
-------------------------
procedure Set_PSD_Pragma_Table is
begin
for F in ALIs.First .. ALIs.Last loop
for K in ALIs.Table (F).First_Specific_Dispatching ..
ALIs.Table (F).Last_Specific_Dispatching
loop
declare
DTK : Specific_Dispatching_Record
renames Specific_Dispatching.Table (K);
begin
while PSD_Pragma_Settings.Last < DTK.Last_Priority loop
PSD_Pragma_Settings.Append ('F');
end loop;
for Prio in DTK.First_Priority .. DTK.Last_Priority loop
PSD_Pragma_Settings.Table (Prio) := DTK.Dispatching_Policy;
end loop;
end;
end loop;
end loop;
end Set_PSD_Pragma_Table;
----------------
-- Set_String --
----------------
procedure Set_String (S : String) is
begin
Statement_Buffer (Last + 1 .. Last + S'Length) := S;
Last := Last + S'Length;
end Set_String;
-------------------
-- Set_Unit_Name --
-------------------
procedure Set_Unit_Name is
begin
for J in 1 .. Name_Len - 2 loop
if Name_Buffer (J) /= '.' then
Set_Char (Name_Buffer (J));
else
Set_String ("__");
end if;
end loop;
end Set_Unit_Name;
---------------------
-- Set_Unit_Number --
---------------------
procedure Set_Unit_Number (U : Unit_Id) is
Num_Units : constant Nat := Nat (Units.Last) - Nat (Unit_Id'First);
Unum : constant Nat := Nat (U) - Nat (Unit_Id'First);
begin
if Num_Units >= 10 and then Unum < 10 then
Set_Char ('0');
end if;
if Num_Units >= 100 and then Unum < 100 then
Set_Char ('0');
end if;
Set_Int (Unum);
end Set_Unit_Number;
----------------------
-- Write_Info_Ada_C --
----------------------
procedure Write_Info_Ada_C (Ada : String; C : String; Common : String) is
begin
if Ada_Bind_File then
declare
S : String (1 .. Ada'Length + Common'Length);
begin
S (1 .. Ada'Length) := Ada;
S (Ada'Length + 1 .. S'Length) := Common;
WBI (S);
end;
else
declare
S : String (1 .. C'Length + Common'Length);
begin
S (1 .. C'Length) := C;
S (C'Length + 1 .. S'Length) := Common;
WBI (S);
end;
end if;
end Write_Info_Ada_C;
----------------------------
-- Write_Statement_Buffer --
----------------------------
procedure Write_Statement_Buffer is
begin
WBI (Statement_Buffer (1 .. Last));
Last := 0;
end Write_Statement_Buffer;
procedure Write_Statement_Buffer (S : String) is
begin
Set_String (S);
Write_Statement_Buffer;
end Write_Statement_Buffer;
end Bindgen;
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