1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
9 -- Copyright (C) 1999-2009, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Csets
; use Csets
;
28 with Osint
; use Osint
;
29 with Output
; use Output
;
31 package body Targparm
is
34 Parameters_Obtained
: Boolean := False;
35 -- Set True after first call to Get_Target_Parameters. Used to avoid
36 -- reading system.ads more than once, since it cannot change.
38 -- The following array defines a tag name for each entry
42 ACR
, -- Always_Compatible_Rep
43 BDC
, -- Backend_Divide_Checks
44 BOC
, -- Backend_Overflow_Checks
45 CLA
, -- Command_Line_Args
47 CRT
, -- Configurable_Run_Times
48 D32
, -- Duration_32_Bits
50 EXS
, -- Exit_Status_Supported
51 FEL
, -- Frontend_Layout
52 FFO
, -- Fractional_Fixed_Ops
54 MOV
, -- Machine_Overflows
55 MRN
, -- Machine_Rounds
56 PAS
, -- Preallocated_Stacks
57 RTX
, -- RTX_RTSS_Kernel_Module
58 S64
, -- Support_64_Bit_Divides
59 SAG
, -- Support_Aggregates
60 SCA
, -- Support_Composite_Assign
61 SCC
, -- Support_Composite_Compare
62 SCD
, -- Stack_Check_Default
63 SCL
, -- Stack_Check_Limits
64 SCP
, -- Stack_Check_Probes
65 SLS
, -- Support_Long_Shifts
67 SSL
, -- Suppress_Standard_Library
68 UAM
, -- Use_Ada_Main_Program_Name
70 ZCD
, -- ZCX_By_Default
71 ZCG
); -- GCC_ZCX_Support
73 Targparm_Flags
: array (Targparm_Tags
) of Boolean := (others => False);
74 -- Flag is set True if corresponding parameter is scanned
76 -- The following list of string constants gives the parameter names
78 AAM_Str
: aliased constant Source_Buffer
:= "AAMP";
79 ACR_Str
: aliased constant Source_Buffer
:= "Always_Compatible_Rep";
80 BDC_Str
: aliased constant Source_Buffer
:= "Backend_Divide_Checks";
81 BOC_Str
: aliased constant Source_Buffer
:= "Backend_Overflow_Checks";
82 CLA_Str
: aliased constant Source_Buffer
:= "Command_Line_Args";
83 CLI_Str
: aliased constant Source_Buffer
:= "CLI";
84 CRT_Str
: aliased constant Source_Buffer
:= "Configurable_Run_Time";
85 D32_Str
: aliased constant Source_Buffer
:= "Duration_32_Bits";
86 DEN_Str
: aliased constant Source_Buffer
:= "Denorm";
87 EXS_Str
: aliased constant Source_Buffer
:= "Exit_Status_Supported";
88 FEL_Str
: aliased constant Source_Buffer
:= "Frontend_Layout";
89 FFO_Str
: aliased constant Source_Buffer
:= "Fractional_Fixed_Ops";
90 JVM_Str
: aliased constant Source_Buffer
:= "JVM";
91 MOV_Str
: aliased constant Source_Buffer
:= "Machine_Overflows";
92 MRN_Str
: aliased constant Source_Buffer
:= "Machine_Rounds";
93 PAS_Str
: aliased constant Source_Buffer
:= "Preallocated_Stacks";
94 RTX_Str
: aliased constant Source_Buffer
:= "RTX_RTSS_Kernel_Module";
95 S64_Str
: aliased constant Source_Buffer
:= "Support_64_Bit_Divides";
96 SAG_Str
: aliased constant Source_Buffer
:= "Support_Aggregates";
97 SCA_Str
: aliased constant Source_Buffer
:= "Support_Composite_Assign";
98 SCC_Str
: aliased constant Source_Buffer
:= "Support_Composite_Compare";
99 SCD_Str
: aliased constant Source_Buffer
:= "Stack_Check_Default";
100 SCL_Str
: aliased constant Source_Buffer
:= "Stack_Check_Limits";
101 SCP_Str
: aliased constant Source_Buffer
:= "Stack_Check_Probes";
102 SLS_Str
: aliased constant Source_Buffer
:= "Support_Long_Shifts";
103 SNZ_Str
: aliased constant Source_Buffer
:= "Signed_Zeros";
104 SSL_Str
: aliased constant Source_Buffer
:= "Suppress_Standard_Library";
105 UAM_Str
: aliased constant Source_Buffer
:= "Use_Ada_Main_Program_Name";
106 VMS_Str
: aliased constant Source_Buffer
:= "OpenVMS";
107 ZCD_Str
: aliased constant Source_Buffer
:= "ZCX_By_Default";
108 ZCG_Str
: aliased constant Source_Buffer
:= "GCC_ZCX_Support";
110 -- The following defines a set of pointers to the above strings,
111 -- indexed by the tag values.
113 type Buffer_Ptr
is access constant Source_Buffer
;
114 Targparm_Str
: constant array (Targparm_Tags
) of Buffer_Ptr
:=
147 -----------------------
148 -- Local Subprograms --
149 -----------------------
151 procedure Set_Profile_Restrictions
(P
: Profile_Name
);
152 -- Set Restrictions_On_Target for the given profile
154 ---------------------------
155 -- Get_Target_Parameters --
156 ---------------------------
158 -- Version which reads in system.ads
160 procedure Get_Target_Parameters
is
161 Text
: Source_Buffer_Ptr
;
165 if Parameters_Obtained
then
169 Name_Buffer
(1 .. 10) := "system.ads";
172 Read_Source_File
(Name_Find
, Lo
=> 0, Hi
=> Hi
, Src
=> Text
);
175 Write_Line
("fatal error, run-time library not installed correctly");
176 Write_Line
("cannot locate file system.ads");
177 raise Unrecoverable_Error
;
180 Get_Target_Parameters
181 (System_Text
=> Text
,
184 end Get_Target_Parameters
;
186 -- Version where caller supplies system.ads text
188 procedure Get_Target_Parameters
189 (System_Text
: Source_Buffer_Ptr
;
190 Source_First
: Source_Ptr
;
191 Source_Last
: Source_Ptr
)
194 -- Scans source buffer containing source of system.ads
196 Fatal
: Boolean := False;
197 -- Set True if a fatal error is detected
200 -- Records boolean from system line
203 if Parameters_Obtained
then
206 Parameters_Obtained
:= True;
209 Opt
.Address_Is_Private
:= False;
212 Line_Loop
: while System_Text
(P
.. P
+ 10) /= "end System;" loop
214 -- Skip comments quickly
216 if System_Text
(P
) = '-' then
217 goto Line_Loop_Continue
;
219 -- Test for type Address is private
221 elsif System_Text
(P
.. P
+ 26) = " type Address is private;" then
222 Opt
.Address_Is_Private
:= True;
224 goto Line_Loop_Continue
;
226 -- Test for pragma Profile (Ravenscar);
228 elsif System_Text
(P
.. P
+ 26) =
229 "pragma Profile (Ravenscar);"
231 Set_Profile_Restrictions
(Ravenscar
);
232 Opt
.Task_Dispatching_Policy
:= 'F';
233 Opt
.Locking_Policy
:= 'C';
235 goto Line_Loop_Continue
;
237 -- Test for pragma Profile (Restricted);
239 elsif System_Text
(P
.. P
+ 27) =
240 "pragma Profile (Restricted);"
242 Set_Profile_Restrictions
(Restricted
);
244 goto Line_Loop_Continue
;
246 -- Test for pragma Restrictions
248 elsif System_Text
(P
.. P
+ 20) = "pragma Restrictions (" then
251 Rloop
: for K
in All_Boolean_Restrictions
loop
253 Rname
: constant String := Restriction_Id
'Image (K
);
256 for J
in Rname
'Range loop
257 if Fold_Upper
(System_Text
(P
+ Source_Ptr
(J
- 1)))
264 if System_Text
(P
+ Rname
'Length) = ')' then
265 Restrictions_On_Target
.Set
(K
) := True;
266 goto Line_Loop_Continue
;
274 Ploop
: for K
in All_Parameter_Restrictions
loop
276 Rname
: constant String :=
277 All_Parameter_Restrictions
'Image (K
);
283 for J
in Rname
'Range loop
284 if Fold_Upper
(System_Text
(P
+ Source_Ptr
(J
- 1)))
291 if System_Text
(P
+ Rname
'Length .. P
+ Rname
'Length + 3) =
294 P
:= P
+ Rname
'Length + 4;
298 if System_Text
(P
) in '0' .. '9' then
300 pragma Unsuppress
(Overflow_Check
);
303 -- Accumulate next digit
306 Character'Pos (System_Text
(P
)) -
310 -- On overflow, we just ignore the pragma since
311 -- that is the standard handling in this case.
313 when Constraint_Error
=>
314 goto Line_Loop_Continue
;
317 elsif System_Text
(P
) = '_' then
320 elsif System_Text
(P
) = ')' then
321 Restrictions_On_Target
.Value
(K
) := V
;
322 Restrictions_On_Target
.Set
(K
) := True;
323 goto Line_Loop_Continue
;
343 ("fatal error: system.ads is incorrectly formatted");
344 Write_Str
("unrecognized or incorrect restrictions pragma: ");
346 while System_Text
(P
) /= ')'
348 System_Text
(P
) /= ASCII
.LF
350 Write_Char
(System_Text
(P
));
358 -- Test for pragma Detect_Blocking;
360 elsif System_Text
(P
.. P
+ 22) = "pragma Detect_Blocking;" then
362 Opt
.Detect_Blocking
:= True;
363 goto Line_Loop_Continue
;
367 elsif System_Text
(P
.. P
+ 20) = "pragma Discard_Names;" then
369 Opt
.Global_Discard_Names
:= True;
370 goto Line_Loop_Continue
;
374 elsif System_Text
(P
.. P
+ 22) = "pragma Locking_Policy (" then
376 Opt
.Locking_Policy
:= System_Text
(P
);
377 Opt
.Locking_Policy_Sloc
:= System_Location
;
378 goto Line_Loop_Continue
;
382 elsif System_Text
(P
.. P
+ 24) = "pragma Normalize_Scalars;" then
384 Opt
.Normalize_Scalars
:= True;
385 Opt
.Init_Or_Norm_Scalars
:= True;
386 goto Line_Loop_Continue
;
390 elsif System_Text
(P
.. P
+ 19) = "pragma Polling (On);" then
392 Opt
.Polling_Required
:= True;
393 goto Line_Loop_Continue
;
395 -- Ignore pragma Pure (System)
397 elsif System_Text
(P
.. P
+ 20) = "pragma Pure (System);" then
399 goto Line_Loop_Continue
;
403 elsif System_Text
(P
.. P
+ 22) = "pragma Queuing_Policy (" then
405 Opt
.Queuing_Policy
:= System_Text
(P
);
406 Opt
.Queuing_Policy_Sloc
:= System_Location
;
407 goto Line_Loop_Continue
;
409 -- Suppress_Exception_Locations
411 elsif System_Text
(P
.. P
+ 35) =
412 "pragma Suppress_Exception_Locations;"
415 Opt
.Exception_Locations_Suppressed
:= True;
416 goto Line_Loop_Continue
;
418 -- Task_Dispatching Policy
420 elsif System_Text
(P
.. P
+ 31) =
421 "pragma Task_Dispatching_Policy ("
424 Opt
.Task_Dispatching_Policy
:= System_Text
(P
);
425 Opt
.Task_Dispatching_Policy_Sloc
:= System_Location
;
426 goto Line_Loop_Continue
;
428 -- No other pragmas are permitted
430 elsif System_Text
(P
.. P
+ 6) = "pragma " then
432 Write_Line
("unrecognized line in system.ads: ");
434 while System_Text
(P
) /= ')'
435 and then System_Text
(P
) /= ASCII
.LF
437 Write_Char
(System_Text
(P
));
445 -- See if we have a Run_Time_Name
447 elsif System_Text
(P
.. P
+ 38) =
448 " Run_Time_Name : constant String := """
453 while System_Text
(P
) in 'A' .. 'Z'
455 System_Text
(P
) in 'a' .. 'z'
457 System_Text
(P
) in '0' .. '9'
459 System_Text
(P
) = ' '
461 System_Text
(P
) = '_'
463 Add_Char_To_Name_Buffer
(System_Text
(P
));
467 if System_Text
(P
) /= '"'
468 or else System_Text
(P
+ 1) /= ';'
469 or else (System_Text
(P
+ 2) /= ASCII
.LF
471 System_Text
(P
+ 2) /= ASCII
.CR
)
475 ("incorrectly formatted Run_Time_Name in system.ads");
480 Run_Time_Name_On_Target
:= Name_Enter
;
483 goto Line_Loop_Continue
;
485 -- See if we have an Executable_Extension
487 elsif System_Text
(P
.. P
+ 45) =
488 " Executable_Extension : constant String := """
493 while System_Text
(P
) /= '"'
494 and then System_Text
(P
) /= ASCII
.LF
496 Add_Char_To_Name_Buffer
(System_Text
(P
));
500 if System_Text
(P
) /= '"' or else System_Text
(P
+ 1) /= ';' then
503 ("incorrectly formatted Executable_Extension in system.ads");
508 Executable_Extension_On_Target
:= Name_Enter
;
511 goto Line_Loop_Continue
;
513 -- Next See if we have a configuration parameter
516 Config_Param_Loop
: for K
in Targparm_Tags
loop
517 if System_Text
(P
+ 3 .. P
+ 2 + Targparm_Str
(K
)'Length) =
520 P
:= P
+ 3 + Targparm_Str
(K
)'Length;
522 if Targparm_Flags
(K
) then
525 ("fatal error: system.ads is incorrectly formatted");
526 Write_Str
("duplicate line for parameter: ");
528 for J
in Targparm_Str
(K
)'Range loop
529 Write_Char
(Targparm_Str
(K
).all (J
));
537 Targparm_Flags
(K
) := True;
540 while System_Text
(P
) /= ':'
541 or else System_Text
(P
+ 1) /= '='
548 while System_Text
(P
) = ' ' loop
552 Result
:= (System_Text
(P
) = 'T');
555 when AAM
=> AAMP_On_Target
:= Result
;
556 when ACR
=> Always_Compatible_Rep_On_Target
:= Result
;
557 when BDC
=> Backend_Divide_Checks_On_Target
:= Result
;
558 when BOC
=> Backend_Overflow_Checks_On_Target
:= Result
;
559 when CLA
=> Command_Line_Args_On_Target
:= Result
;
562 VM_Target
:= CLI_Target
;
563 Tagged_Type_Expansion
:= False;
566 when CRT
=> Configurable_Run_Time_On_Target
:= Result
;
567 when D32
=> Duration_32_Bits_On_Target
:= Result
;
568 when DEN
=> Denorm_On_Target
:= Result
;
569 when EXS
=> Exit_Status_Supported_On_Target
:= Result
;
570 when FEL
=> Frontend_Layout_On_Target
:= Result
;
571 when FFO
=> Fractional_Fixed_Ops_On_Target
:= Result
;
574 VM_Target
:= JVM_Target
;
575 Tagged_Type_Expansion
:= False;
578 when MOV
=> Machine_Overflows_On_Target
:= Result
;
579 when MRN
=> Machine_Rounds_On_Target
:= Result
;
580 when PAS
=> Preallocated_Stacks_On_Target
:= Result
;
581 when RTX
=> RTX_RTSS_Kernel_Module_On_Target
:= Result
;
582 when S64
=> Support_64_Bit_Divides_On_Target
:= Result
;
583 when SAG
=> Support_Aggregates_On_Target
:= Result
;
584 when SCA
=> Support_Composite_Assign_On_Target
:= Result
;
585 when SCC
=> Support_Composite_Compare_On_Target
:= Result
;
586 when SCD
=> Stack_Check_Default_On_Target
:= Result
;
587 when SCL
=> Stack_Check_Limits_On_Target
:= Result
;
588 when SCP
=> Stack_Check_Probes_On_Target
:= Result
;
589 when SLS
=> Support_Long_Shifts_On_Target
:= Result
;
590 when SSL
=> Suppress_Standard_Library_On_Target
:= Result
;
591 when SNZ
=> Signed_Zeros_On_Target
:= Result
;
592 when UAM
=> Use_Ada_Main_Program_Name_On_Target
:= Result
;
593 when VMS
=> OpenVMS_On_Target
:= Result
;
594 when ZCD
=> ZCX_By_Default_On_Target
:= Result
;
595 when ZCG
=> GCC_ZCX_Support_On_Target
:= Result
;
597 goto Line_Loop_Continue
;
600 -- Here we are seeing a parameter we do not understand. We
601 -- simply ignore this (will happen when an old compiler is
602 -- used to compile a newer version of GNAT which does not
603 -- support the parameter).
605 end loop Config_Param_Loop
;
608 -- Here after processing one line of System spec
610 <<Line_Loop_Continue
>>
612 while System_Text
(P
) /= CR
and then System_Text
(P
) /= LF
loop
614 exit when P
>= Source_Last
;
617 while System_Text
(P
) = CR
or else System_Text
(P
) = LF
loop
619 exit when P
>= Source_Last
;
622 if P
>= Source_Last
then
624 Write_Line
("fatal error, system.ads not formatted correctly");
625 Write_Line
("unexpected end of file");
627 raise Unrecoverable_Error
;
631 -- Now that OpenVMS_On_Target has been given its definitive value,
632 -- change the multi-unit index character from '~' to '$' for OpenVMS.
634 if OpenVMS_On_Target
then
635 Multi_Unit_Index_Character
:= '$';
639 raise Unrecoverable_Error
;
641 end Get_Target_Parameters
;
643 ------------------------------
644 -- Set_Profile_Restrictions --
645 ------------------------------
647 procedure Set_Profile_Restrictions
(P
: Profile_Name
) is
648 R
: Restriction_Flags
renames Profile_Info
(P
).Set
;
649 V
: Restriction_Values
renames Profile_Info
(P
).Value
;
651 for J
in R
'Range loop
653 Restrictions_On_Target
.Set
(J
) := True;
655 if J
in All_Parameter_Restrictions
then
656 Restrictions_On_Target
.Value
(J
) := V
(J
);
660 end Set_Profile_Restrictions
;