1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
9 -- Copyright (C) 1999-2007, 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 BDC, -- Backend_Divide_Checks
43 BOC, -- Backend_Overflow_Checks
44 CLA, -- Command_Line_Args
46 CRT, -- Configurable_Run_Times
47 D32, -- Duration_32_Bits
49 EXS, -- Exit_Status_Supported
50 FEL, -- Frontend_Layout
51 FFO, -- Fractional_Fixed_Ops
53 MOV, -- Machine_Overflows
54 MRN, -- Machine_Rounds
55 PAS, -- Preallocated_Stacks
56 S64, -- Support_64_Bit_Divides
57 SAG, -- Support_Aggregates
58 SCA, -- Support_Composite_Assign
59 SCC, -- Support_Composite_Compare
60 SCD, -- Stack_Check_Default
61 SCP, -- Stack_Check_Probes
62 SLS, -- Support_Long_Shifts
64 SSL, -- Suppress_Standard_Library
65 UAM, -- Use_Ada_Main_Program_Name
67 ZCD, -- ZCX_By_Default
68 ZCG); -- GCC_ZCX_Support
70 Targparm_Flags : array (Targparm_Tags) of Boolean := (others => False);
71 -- Flag is set True if corresponding parameter is scanned
73 -- The following list of string constants gives the parameter names
75 AAM_Str : aliased constant Source_Buffer := "AAMP";
76 BDC_Str : aliased constant Source_Buffer := "Backend_Divide_Checks";
77 BOC_Str : aliased constant Source_Buffer := "Backend_Overflow_Checks";
78 CLA_Str : aliased constant Source_Buffer := "Command_Line_Args";
79 CLI_Str : aliased constant Source_Buffer := "CLI";
80 CRT_Str : aliased constant Source_Buffer := "Configurable_Run_Time";
81 D32_Str : aliased constant Source_Buffer := "Duration_32_Bits";
82 DEN_Str : aliased constant Source_Buffer := "Denorm";
83 EXS_Str : aliased constant Source_Buffer := "Exit_Status_Supported";
84 FEL_Str : aliased constant Source_Buffer := "Frontend_Layout";
85 FFO_Str : aliased constant Source_Buffer := "Fractional_Fixed_Ops";
86 JVM_Str : aliased constant Source_Buffer := "JVM";
87 MOV_Str : aliased constant Source_Buffer := "Machine_Overflows";
88 MRN_Str : aliased constant Source_Buffer := "Machine_Rounds";
89 PAS_Str : aliased constant Source_Buffer := "Preallocated_Stacks";
90 S64_Str : aliased constant Source_Buffer := "Support_64_Bit_Divides";
91 SAG_Str : aliased constant Source_Buffer := "Support_Aggregates";
92 SCA_Str : aliased constant Source_Buffer := "Support_Composite_Assign";
93 SCC_Str : aliased constant Source_Buffer := "Support_Composite_Compare";
94 SCD_Str : aliased constant Source_Buffer := "Stack_Check_Default";
95 SCP_Str : aliased constant Source_Buffer := "Stack_Check_Probes";
96 SLS_Str : aliased constant Source_Buffer := "Support_Long_Shifts";
97 SNZ_Str : aliased constant Source_Buffer := "Signed_Zeros";
98 SSL_Str : aliased constant Source_Buffer := "Suppress_Standard_Library";
99 UAM_Str : aliased constant Source_Buffer := "Use_Ada_Main_Program_Name";
100 VMS_Str : aliased constant Source_Buffer := "OpenVMS";
101 ZCD_Str : aliased constant Source_Buffer := "ZCX_By_Default";
102 ZCG_Str : aliased constant Source_Buffer := "GCC_ZCX_Support";
104 -- The following defines a set of pointers to the above strings,
105 -- indexed by the tag values.
107 type Buffer_Ptr is access constant Source_Buffer;
108 Targparm_Str : constant array (Targparm_Tags) of Buffer_Ptr :=
138 -----------------------
139 -- Local Subprograms --
140 -----------------------
142 procedure Set_Profile_Restrictions (P : Profile_Name);
143 -- Set Restrictions_On_Target for the given profile
145 ---------------------------
146 -- Get_Target_Parameters --
147 ---------------------------
149 -- Version which reads in system.ads
151 procedure Get_Target_Parameters is
152 Text : Source_Buffer_Ptr;
156 if Parameters_Obtained then
160 Name_Buffer (1 .. 10) := "system.ads";
163 Read_Source_File (Name_Find, Lo => 0, Hi => Hi, Src => Text);
166 Write_Line ("fatal error, run-time library not installed correctly");
167 Write_Line ("cannot locate file system.ads");
168 raise Unrecoverable_Error;
171 Targparm.Get_Target_Parameters
172 (System_Text => Text,
175 end Get_Target_Parameters;
177 -- Version where caller supplies system.ads text
179 procedure Get_Target_Parameters
180 (System_Text : Source_Buffer_Ptr;
181 Source_First : Source_Ptr;
182 Source_Last : Source_Ptr)
185 -- Scans source buffer containing source of system.ads
187 Fatal : Boolean := False;
188 -- Set True if a fatal error is detected
191 -- Records boolean from system line
194 if Parameters_Obtained then
197 Parameters_Obtained := True;
200 Opt.Address_Is_Private := False;
203 Line_Loop : while System_Text (P .. P + 10) /= "end System;" loop
205 -- Skip comments quickly
207 if System_Text (P) = '-' then
208 goto Line_Loop_Continue;
210 -- Test for type Address is private
212 elsif System_Text (P .. P + 26) = " type Address is private;" then
213 Opt.Address_Is_Private := True;
215 goto Line_Loop_Continue;
217 -- Test for pragma Profile (Ravenscar);
219 elsif System_Text (P .. P + 26) =
220 "pragma Profile (Ravenscar);"
222 Set_Profile_Restrictions (Ravenscar);
223 Opt.Task_Dispatching_Policy := 'F';
224 Opt.Locking_Policy := 'C';
226 goto Line_Loop_Continue;
228 -- Test for pragma Profile (Restricted);
230 elsif System_Text (P .. P + 27) =
231 "pragma Profile (Restricted);"
233 Set_Profile_Restrictions (Restricted);
235 goto Line_Loop_Continue;
237 -- Test for pragma Restrictions
239 elsif System_Text (P .. P + 20) = "pragma Restrictions (" then
242 Rloop : for K in All_Boolean_Restrictions loop
244 Rname : constant String := Restriction_Id'Image (K);
247 for J in Rname'Range loop
248 if Fold_Upper (System_Text (P + Source_Ptr (J - 1)))
255 if System_Text (P + Rname'Length) = ')' then
256 Restrictions_On_Target.Set (K) := True;
257 goto Line_Loop_Continue;
265 Ploop : for K in All_Parameter_Restrictions loop
267 Rname : constant String :=
268 All_Parameter_Restrictions'Image (K);
274 for J in Rname'Range loop
275 if Fold_Upper (System_Text (P + Source_Ptr (J - 1)))
282 if System_Text (P + Rname'Length .. P + Rname'Length + 3) =
285 P := P + Rname'Length + 4;
289 if System_Text (P) in '0' .. '9' then
291 pragma Unsuppress (Overflow_Check);
294 -- Accumulate next digit
297 Character'Pos (System_Text (P)) -
301 -- On overflow, we just ignore the pragma since
302 -- that is the standard handling in this case.
304 when Constraint_Error =>
305 goto Line_Loop_Continue;
308 elsif System_Text (P) = '_' then
311 elsif System_Text (P) = ')' then
312 Restrictions_On_Target.Value (K) := V;
313 Restrictions_On_Target.Set (K) := True;
314 goto Line_Loop_Continue;
334 ("fatal error: system.ads is incorrectly formatted");
335 Write_Str ("unrecognized or incorrect restrictions pragma: ");
337 while System_Text (P) /= ')'
339 System_Text (P) /= ASCII.LF
341 Write_Char (System_Text (P));
349 -- Test for pragma Detect_Blocking;
351 elsif System_Text (P .. P + 22) = "pragma Detect_Blocking;" then
353 Opt.Detect_Blocking := True;
354 goto Line_Loop_Continue;
358 elsif System_Text (P .. P + 20) = "pragma Discard_Names;" then
360 Opt.Global_Discard_Names := True;
361 goto Line_Loop_Continue;
365 elsif System_Text (P .. P + 22) = "pragma Locking_Policy (" then
367 Opt.Locking_Policy := System_Text (P);
368 Opt.Locking_Policy_Sloc := System_Location;
369 goto Line_Loop_Continue;
373 elsif System_Text (P .. P + 24) = "pragma Normalize_Scalars;" then
375 Opt.Normalize_Scalars := True;
376 Opt.Init_Or_Norm_Scalars := True;
377 goto Line_Loop_Continue;
381 elsif System_Text (P .. P + 19) = "pragma Polling (On);" then
383 Opt.Polling_Required := True;
384 goto Line_Loop_Continue;
386 -- Ignore pragma Pure (System)
388 elsif System_Text (P .. P + 20) = "pragma Pure (System);" then
390 goto Line_Loop_Continue;
394 elsif System_Text (P .. P + 22) = "pragma Queuing_Policy (" then
396 Opt.Queuing_Policy := System_Text (P);
397 Opt.Queuing_Policy_Sloc := System_Location;
398 goto Line_Loop_Continue;
400 -- Suppress_Exception_Locations
402 elsif System_Text (P .. P + 34) =
403 "pragma Suppress_Exception_Locations;"
406 Opt.Exception_Locations_Suppressed := True;
407 goto Line_Loop_Continue;
409 -- Task_Dispatching Policy
411 elsif System_Text (P .. P + 31) =
412 "pragma Task_Dispatching_Policy ("
415 Opt.Task_Dispatching_Policy := System_Text (P);
416 Opt.Task_Dispatching_Policy_Sloc := System_Location;
417 goto Line_Loop_Continue;
419 -- No other pragmas are permitted
421 elsif System_Text (P .. P + 6) = "pragma " then
423 Write_Line ("unrecognized line in system.ads: ");
425 while System_Text (P) /= ')'
426 and then System_Text (P) /= ASCII.LF
428 Write_Char (System_Text (P));
436 -- See if we have a Run_Time_Name
438 elsif System_Text (P .. P + 38) =
439 " Run_Time_Name : constant String := """
444 while System_Text (P) in 'A' .. 'Z'
446 System_Text (P) in 'a' .. 'z'
448 System_Text (P) in '0' .. '9'
450 System_Text (P) = ' '
452 System_Text (P) = '_'
454 Add_Char_To_Name_Buffer (System_Text (P));
458 if System_Text (P) /= '"'
459 or else System_Text (P + 1) /= ';'
460 or else (System_Text (P + 2) /= ASCII.LF
462 System_Text (P + 2) /= ASCII.CR)
466 ("incorrectly formatted Run_Time_Name in system.ads");
471 Run_Time_Name_On_Target := Name_Enter;
474 goto Line_Loop_Continue;
476 -- See if we have an Executable_Extension
478 elsif System_Text (P .. P + 45) =
479 " Executable_Extension : constant String := """
484 while System_Text (P) /= '"'
485 and then System_Text (P) /= ASCII.LF
487 Add_Char_To_Name_Buffer (System_Text (P));
491 if System_Text (P) /= '"' or else System_Text (P + 1) /= ';' then
494 ("incorrectly formatted Executable_Extension in system.ads");
499 Executable_Extension_On_Target := Name_Enter;
502 goto Line_Loop_Continue;
504 -- Next See if we have a configuration parameter
507 Config_Param_Loop : for K in Targparm_Tags loop
508 if System_Text (P + 3 .. P + 2 + Targparm_Str (K)'Length) =
511 P := P + 3 + Targparm_Str (K)'Length;
513 if Targparm_Flags (K) then
516 ("fatal error: system.ads is incorrectly formatted");
517 Write_Str ("duplicate line for parameter: ");
519 for J in Targparm_Str (K)'Range loop
520 Write_Char (Targparm_Str (K).all (J));
528 Targparm_Flags (K) := True;
531 while System_Text (P) /= ':'
532 or else System_Text (P + 1) /= '='
539 while System_Text (P) = ' ' loop
543 Result := (System_Text (P) = 'T');
546 when AAM => AAMP_On_Target := Result;
547 when BDC => Backend_Divide_Checks_On_Target := Result;
548 when BOC => Backend_Overflow_Checks_On_Target := Result;
549 when CLA => Command_Line_Args_On_Target := Result;
552 VM_Target := CLI_Target;
555 when CRT => Configurable_Run_Time_On_Target := Result;
556 when D32 => Duration_32_Bits_On_Target := Result;
557 when DEN => Denorm_On_Target := Result;
558 when EXS => Exit_Status_Supported_On_Target := Result;
559 when FEL => Frontend_Layout_On_Target := Result;
560 when FFO => Fractional_Fixed_Ops_On_Target := Result;
563 VM_Target := JVM_Target;
566 when MOV => Machine_Overflows_On_Target := Result;
567 when MRN => Machine_Rounds_On_Target := Result;
568 when PAS => Preallocated_Stacks_On_Target := Result;
569 when S64 => Support_64_Bit_Divides_On_Target := Result;
570 when SAG => Support_Aggregates_On_Target := Result;
571 when SCA => Support_Composite_Assign_On_Target := Result;
572 when SCC => Support_Composite_Compare_On_Target := Result;
573 when SCD => Stack_Check_Default_On_Target := Result;
574 when SCP => Stack_Check_Probes_On_Target := Result;
575 when SLS => Support_Long_Shifts_On_Target := Result;
576 when SSL => Suppress_Standard_Library_On_Target := Result;
577 when SNZ => Signed_Zeros_On_Target := Result;
578 when UAM => Use_Ada_Main_Program_Name_On_Target := Result;
579 when VMS => OpenVMS_On_Target := Result;
580 when ZCD => ZCX_By_Default_On_Target := Result;
581 when ZCG => GCC_ZCX_Support_On_Target := Result;
583 goto Line_Loop_Continue;
586 -- Here we are seeing a parameter we do not understand. We
587 -- simply ignore this (will happen when an old compiler is
588 -- used to compile a newer version of GNAT which does not
591 end loop Config_Param_Loop;
594 -- Here after processing one line of System spec
596 <<Line_Loop_Continue>>
598 while System_Text (P) /= CR and then System_Text (P) /= LF loop
600 exit when P >= Source_Last;
603 while System_Text (P) = CR or else System_Text (P) = LF loop
605 exit when P >= Source_Last;
608 if P >= Source_Last then
610 Write_Line ("fatal error, system.ads not formatted correctly");
611 Write_Line ("unexpected end of file");
613 raise Unrecoverable_Error;
617 -- Now that OpenVMS_On_Target has been given its definitive value,
618 -- change the multi-unit index character from '~' to '$' for OpenVMS.
620 if OpenVMS_On_Target then
621 Multi_Unit_Index_Character := '$';
625 raise Unrecoverable_Error;
627 end Get_Target_Parameters;
629 ------------------------------
630 -- Set_Profile_Restrictions --
631 ------------------------------
633 procedure Set_Profile_Restrictions (P : Profile_Name) is
634 R : Restriction_Flags renames Profile_Info (P).Set;
635 V : Restriction_Values renames Profile_Info (P).Value;
637 for J in R'Range loop
639 Restrictions_On_Target.Set (J) := True;
641 if J in All_Parameter_Restrictions then
642 Restrictions_On_Target.Value (J) := V (J);
646 end Set_Profile_Restrictions;