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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- T A R G P A R M --
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6 -- --
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7 -- B o d y --
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8 -- --
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145
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9 -- Copyright (C) 1999-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 with Csets; use Csets;
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27 with Opt;
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28 with Osint; use Osint;
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29 with Output; use Output;
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30 with System.OS_Lib; use System.OS_Lib;
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31
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32 package body Targparm is
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33 use ASCII;
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34
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35 Parameters_Obtained : Boolean := False;
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36 -- Set True after first call to Get_Target_Parameters. Used to avoid
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37 -- reading system.ads more than once, since it cannot change.
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38
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39 -- The following array defines a tag name for each entry
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40
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41 type Targparm_Tags is
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42 (AAM, -- AAMP
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43 ACR, -- Always_Compatible_Rep
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44 ASD, -- Atomic_Sync_Default
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45 BDC, -- Backend_Divide_Checks
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46 BOC, -- Backend_Overflow_Checks
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47 CLA, -- Command_Line_Args
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48 CRT, -- Configurable_Run_Times
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49 D32, -- Duration_32_Bits
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50 DEN, -- Denorm
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51 EXS, -- Exit_Status_Supported
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52 FEL, -- Frontend_Layout
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53 FEX, -- Frontend_Exceptions
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54 FFO, -- Fractional_Fixed_Ops
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55 MOV, -- Machine_Overflows
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56 MRN, -- Machine_Rounds
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57 PAS, -- Preallocated_Stacks
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58 SAG, -- Support_Aggregates
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59 SAP, -- Support_Atomic_Primitives
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60 SCA, -- Support_Composite_Assign
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61 SCC, -- Support_Composite_Compare
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62 SCD, -- Stack_Check_Default
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63 SCL, -- Stack_Check_Limits
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64 SCP, -- Stack_Check_Probes
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65 SLS, -- Support_Long_Shifts
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66 SNZ, -- Signed_Zeros
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67 SSL, -- Suppress_Standard_Library
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68 UAM, -- Use_Ada_Main_Program_Name
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69 ZCX); -- ZCX_By_Default
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70
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71 Targparm_Flags : array (Targparm_Tags) of Boolean := (others => False);
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72 -- Flag is set True if corresponding parameter is scanned
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73
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74 -- The following list of string constants gives the parameter names
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75
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76 AAM_Str : aliased constant Source_Buffer := "AAMP";
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77 ACR_Str : aliased constant Source_Buffer := "Always_Compatible_Rep";
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78 ASD_Str : aliased constant Source_Buffer := "Atomic_Sync_Default";
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79 BDC_Str : aliased constant Source_Buffer := "Backend_Divide_Checks";
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80 BOC_Str : aliased constant Source_Buffer := "Backend_Overflow_Checks";
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81 CLA_Str : aliased constant Source_Buffer := "Command_Line_Args";
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82 CRT_Str : aliased constant Source_Buffer := "Configurable_Run_Time";
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83 D32_Str : aliased constant Source_Buffer := "Duration_32_Bits";
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84 DEN_Str : aliased constant Source_Buffer := "Denorm";
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85 EXS_Str : aliased constant Source_Buffer := "Exit_Status_Supported";
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86 FEL_Str : aliased constant Source_Buffer := "Frontend_Layout";
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87 FEX_Str : aliased constant Source_Buffer := "Frontend_Exceptions";
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88 FFO_Str : aliased constant Source_Buffer := "Fractional_Fixed_Ops";
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89 MOV_Str : aliased constant Source_Buffer := "Machine_Overflows";
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90 MRN_Str : aliased constant Source_Buffer := "Machine_Rounds";
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91 PAS_Str : aliased constant Source_Buffer := "Preallocated_Stacks";
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92 SAG_Str : aliased constant Source_Buffer := "Support_Aggregates";
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93 SAP_Str : aliased constant Source_Buffer := "Support_Atomic_Primitives";
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94 SCA_Str : aliased constant Source_Buffer := "Support_Composite_Assign";
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95 SCC_Str : aliased constant Source_Buffer := "Support_Composite_Compare";
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96 SCD_Str : aliased constant Source_Buffer := "Stack_Check_Default";
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97 SCL_Str : aliased constant Source_Buffer := "Stack_Check_Limits";
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98 SCP_Str : aliased constant Source_Buffer := "Stack_Check_Probes";
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99 SLS_Str : aliased constant Source_Buffer := "Support_Long_Shifts";
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100 SNZ_Str : aliased constant Source_Buffer := "Signed_Zeros";
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101 SSL_Str : aliased constant Source_Buffer := "Suppress_Standard_Library";
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102 UAM_Str : aliased constant Source_Buffer := "Use_Ada_Main_Program_Name";
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103 ZCX_Str : aliased constant Source_Buffer := "ZCX_By_Default";
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104
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105 -- The following defines a set of pointers to the above strings,
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106 -- indexed by the tag values.
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107
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108 type Buffer_Ptr is access constant Source_Buffer;
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109 Targparm_Str : constant array (Targparm_Tags) of Buffer_Ptr :=
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110 (AAM => AAM_Str'Access,
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111 ACR => ACR_Str'Access,
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112 ASD => ASD_Str'Access,
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113 BDC => BDC_Str'Access,
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114 BOC => BOC_Str'Access,
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115 CLA => CLA_Str'Access,
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116 CRT => CRT_Str'Access,
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117 D32 => D32_Str'Access,
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118 DEN => DEN_Str'Access,
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119 EXS => EXS_Str'Access,
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120 FEL => FEL_Str'Access,
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121 FEX => FEX_Str'Access,
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122 FFO => FFO_Str'Access,
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123 MOV => MOV_Str'Access,
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124 MRN => MRN_Str'Access,
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125 PAS => PAS_Str'Access,
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126 SAG => SAG_Str'Access,
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127 SAP => SAP_Str'Access,
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128 SCA => SCA_Str'Access,
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129 SCC => SCC_Str'Access,
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130 SCD => SCD_Str'Access,
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131 SCL => SCL_Str'Access,
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132 SCP => SCP_Str'Access,
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133 SLS => SLS_Str'Access,
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134 SNZ => SNZ_Str'Access,
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135 SSL => SSL_Str'Access,
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136 UAM => UAM_Str'Access,
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137 ZCX => ZCX_Str'Access);
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138
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139 -----------------------
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140 -- Local Subprograms --
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141 -----------------------
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142
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143 procedure Set_Profile_Restrictions (P : Profile_Name);
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144 -- Set Restrictions_On_Target for the given profile
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145
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146 ---------------------------
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147 -- Get_Target_Parameters --
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148 ---------------------------
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149
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150 -- Version that reads in system.ads
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151
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152 procedure Get_Target_Parameters
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153 (Make_Id : Make_Id_Type := null;
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154 Make_SC : Make_SC_Type := null;
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155 Set_NOD : Set_NOD_Type := null;
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156 Set_NSA : Set_NSA_Type := null;
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157 Set_NUA : Set_NUA_Type := null;
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158 Set_NUP : Set_NUP_Type := null)
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159 is
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160 FD : File_Descriptor;
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161 Hi : Source_Ptr;
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162 Text : Source_Buffer_Ptr;
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163
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164 begin
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165 if Parameters_Obtained then
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166 return;
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167 end if;
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168
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169 Name_Buffer (1 .. 10) := "system.ads";
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170 Name_Len := 10;
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171
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172 Read_Source_File (Name_Find, 0, Hi, Text, FD);
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173
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174 if Null_Source_Buffer_Ptr (Text) then
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175 Write_Line ("fatal error, run-time library not installed correctly");
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176
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177 if FD = Null_FD then
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178 Write_Line ("cannot locate file system.ads");
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179 else
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180 Write_Line ("no read access for file system.ads");
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181 end if;
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182
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183 raise Unrecoverable_Error;
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184 end if;
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185
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186 Get_Target_Parameters
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187 (System_Text => Text,
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188 Source_First => 0,
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189 Source_Last => Hi,
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190 Make_Id => Make_Id,
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191 Make_SC => Make_SC,
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192 Set_NOD => Set_NOD,
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193 Set_NSA => Set_NSA,
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194 Set_NUA => Set_NUA,
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195 Set_NUP => Set_NUP);
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196 end Get_Target_Parameters;
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197
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198 -- Version where caller supplies system.ads text
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199
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200 procedure Get_Target_Parameters
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201 (System_Text : Source_Buffer_Ptr;
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202 Source_First : Source_Ptr;
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203 Source_Last : Source_Ptr;
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204 Make_Id : Make_Id_Type := null;
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205 Make_SC : Make_SC_Type := null;
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206 Set_NOD : Set_NOD_Type := null;
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207 Set_NSA : Set_NSA_Type := null;
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208 Set_NUA : Set_NUA_Type := null;
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209 Set_NUP : Set_NUP_Type := null)
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210 is
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211 pragma Assert (System_Text'First = Source_First);
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212 pragma Assert (System_Text'Last = Source_Last);
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213
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214 P : Source_Ptr;
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215 -- Scans source buffer containing source of system.ads
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216
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217 Fatal : Boolean := False;
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218 -- Set True if a fatal error is detected
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219
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220 Result : Boolean;
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221 -- Records boolean from system line
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222
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223 OK : Boolean;
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224 -- Status result from Set_NUP/NSA/NUA call
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225
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226 PR_Start : Source_Ptr;
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227 -- Pointer to ( following pragma Restrictions
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228
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229 procedure Collect_Name;
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230 -- Scan a name starting at System_Text (P), and put Name in Name_Buffer,
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231 -- with Name_Len being length, folded to lower case. On return, P points
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232 -- just past the last character (which should be a right paren).
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233
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234 function Looking_At (S : Source_Buffer) return Boolean;
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235 -- True if P points to the same text as S in System_Text
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236
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237 function Looking_At_Skip (S : Source_Buffer) return Boolean;
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238 -- True if P points to the same text as S in System_Text,
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239 -- and if True, moves P forward to skip S as a side effect.
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240
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241 ------------------
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242 -- Collect_Name --
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243 ------------------
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244
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245 procedure Collect_Name is
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246 begin
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247 Name_Len := 0;
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248 loop
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249 if System_Text (P) in 'a' .. 'z'
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250 or else
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251 System_Text (P) = '_'
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252 or else
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253 System_Text (P) in '0' .. '9'
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254 then
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255 Name_Buffer (Name_Len + 1) := System_Text (P);
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256
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257 elsif System_Text (P) in 'A' .. 'Z' then
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258 Name_Buffer (Name_Len + 1) :=
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259 Character'Val (Character'Pos (System_Text (P)) + 32);
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260
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261 else
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262 exit;
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263 end if;
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264
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265 P := P + 1;
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266 Name_Len := Name_Len + 1;
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267 end loop;
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268 end Collect_Name;
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269
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270 ----------------
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271 -- Looking_At --
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272 ----------------
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273
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274 function Looking_At (S : Source_Buffer) return Boolean is
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275 Last : constant Source_Ptr := P + S'Length - 1;
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276 begin
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277 return Last <= System_Text'Last
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278 and then System_Text (P .. Last) = S;
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279 end Looking_At;
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280
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281 ---------------------
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282 -- Looking_At_Skip --
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283 ---------------------
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284
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285 function Looking_At_Skip (S : Source_Buffer) return Boolean is
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286 Result : constant Boolean := Looking_At (S);
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287 begin
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288 if Result then
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289 P := P + S'Length;
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290 end if;
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291
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292 return Result;
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293 end Looking_At_Skip;
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294
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295 -- Start of processing for Get_Target_Parameters
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296
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297 begin
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298 if Parameters_Obtained then
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299 return;
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300 end if;
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301
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302 Parameters_Obtained := True;
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303 Opt.Address_Is_Private := False;
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304
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305 -- Loop through source lines
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306
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307 -- Note: in the case or pragmas, we are only interested in pragmas that
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308 -- appear as configuration pragmas. These are left justified, so they
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309 -- do not have three spaces at the start. Pragmas appearing within the
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310 -- package (like Pure and No_Elaboration_Code_All) will have the three
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311 -- spaces at the start and so will be ignored.
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312
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313 -- For a special exception, see processing for pragma Pure below
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314
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315 P := Source_First;
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316
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317 while not Looking_At ("end System;") loop
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318 -- Skip comments
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319
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320 if Looking_At ("-") then
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321 goto Line_Loop_Continue;
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322
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323 -- Test for type Address is private
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324
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325 elsif Looking_At_Skip (" type Address is private;") then
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326 Opt.Address_Is_Private := True;
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327 goto Line_Loop_Continue;
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328
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329 -- Test for pragma Profile (Ravenscar);
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330
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331 elsif Looking_At_Skip ("pragma Profile (Ravenscar);") then
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332 Set_Profile_Restrictions (Ravenscar);
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333 Opt.Task_Dispatching_Policy := 'F';
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334 Opt.Locking_Policy := 'C';
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335 goto Line_Loop_Continue;
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336
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337 -- Test for pragma Profile (GNAT_Extended_Ravenscar);
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338
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339 elsif Looking_At_Skip
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340 ("pragma Profile (GNAT_Extended_Ravenscar);")
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341 then
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342 Set_Profile_Restrictions (GNAT_Extended_Ravenscar);
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343 Opt.Task_Dispatching_Policy := 'F';
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344 Opt.Locking_Policy := 'C';
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345 goto Line_Loop_Continue;
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346
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347 -- Test for pragma Profile (GNAT_Ravenscar_EDF);
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348
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349 elsif Looking_At_Skip ("pragma Profile (GNAT_Ravenscar_EDF);") then
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350 Set_Profile_Restrictions (GNAT_Ravenscar_EDF);
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351 Opt.Task_Dispatching_Policy := 'E';
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352 Opt.Locking_Policy := 'C';
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353 goto Line_Loop_Continue;
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354
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355 -- Test for pragma Profile (Restricted);
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356
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357 elsif Looking_At_Skip ("pragma Profile (Restricted);") then
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358 Set_Profile_Restrictions (Restricted);
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359 goto Line_Loop_Continue;
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360
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361 -- Test for pragma Restrictions
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362
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363 elsif Looking_At_Skip ("pragma Restrictions (") then
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364 PR_Start := P - 1;
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365
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366 -- Boolean restrictions
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367
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368 for K in All_Boolean_Restrictions loop
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369 declare
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370 Rname : constant String := Restriction_Id'Image (K);
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371
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372 begin
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373 for J in Rname'Range loop
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374 if Fold_Upper (System_Text (P + Source_Ptr (J - 1)))
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375 /= Rname (J)
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376 then
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377 goto Rloop_Continue;
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378 end if;
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379 end loop;
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380
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381 if System_Text (P + Rname'Length) = ')' then
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382 Restrictions_On_Target.Set (K) := True;
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383 goto Line_Loop_Continue;
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384 end if;
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385 end;
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386
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387 <<Rloop_Continue>> null;
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388 end loop;
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389
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390 -- Restrictions taking integer parameter
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391
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392 Ploop : for K in Integer_Parameter_Restrictions loop
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393 declare
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394 Rname : constant String :=
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395 All_Parameter_Restrictions'Image (K);
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396
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397 V : Natural;
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398 -- Accumulates value
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399
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400 begin
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401 for J in Rname'Range loop
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402 if Fold_Upper (System_Text (P + Source_Ptr (J - 1)))
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403 /= Rname (J)
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404 then
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405 goto Ploop_Continue;
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406 end if;
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|
407 end loop;
|
|
|
408
|
|
|
409 if System_Text (P + Rname'Length .. P + Rname'Length + 3) =
|
|
|
410 " => "
|
|
|
411 then
|
|
|
412 P := P + Rname'Length + 4;
|
|
|
413
|
|
|
414 V := 0;
|
|
|
415 loop
|
|
|
416 if System_Text (P) in '0' .. '9' then
|
|
|
417 declare
|
|
|
418 pragma Unsuppress (Overflow_Check);
|
|
|
419
|
|
|
420 begin
|
|
|
421 -- Accumulate next digit
|
|
|
422
|
|
|
423 V := 10 * V +
|
|
|
424 Character'Pos (System_Text (P)) -
|
|
|
425 Character'Pos ('0');
|
|
|
426
|
|
|
427 exception
|
|
|
428 -- On overflow, we just ignore the pragma since
|
|
|
429 -- that is the standard handling in this case.
|
|
|
430
|
|
|
431 when Constraint_Error =>
|
|
|
432 goto Line_Loop_Continue;
|
|
|
433 end;
|
|
|
434
|
|
|
435 elsif System_Text (P) = '_' then
|
|
|
436 null;
|
|
|
437
|
|
|
438 elsif System_Text (P) = ')' then
|
|
|
439 Restrictions_On_Target.Value (K) := V;
|
|
|
440 Restrictions_On_Target.Set (K) := True;
|
|
|
441 goto Line_Loop_Continue;
|
|
|
442
|
|
|
443 else
|
|
|
444 exit Ploop;
|
|
|
445 end if;
|
|
|
446
|
|
|
447 P := P + 1;
|
|
|
448 end loop;
|
|
|
449
|
|
|
450 else
|
|
|
451 exit Ploop;
|
|
|
452 end if;
|
|
|
453 end;
|
|
|
454
|
|
|
455 <<Ploop_Continue>> null;
|
|
|
456 end loop Ploop;
|
|
|
457
|
|
|
458 -- No_Dependence case
|
|
|
459
|
|
|
460 if Looking_At_Skip ("No_Dependence => ") then
|
|
|
461 -- Skip this processing (and simply ignore No_Dependence lines)
|
|
|
462 -- if caller did not supply the three subprograms we need to
|
|
|
463 -- process these lines.
|
|
|
464
|
|
|
465 if Make_Id = null then
|
|
|
466 goto Line_Loop_Continue;
|
|
|
467 end if;
|
|
|
468
|
|
|
469 -- We have scanned out "pragma Restrictions (No_Dependence =>"
|
|
|
470
|
|
|
471 declare
|
|
|
472 Unit : Node_Id;
|
|
|
473 Id : Node_Id;
|
|
|
474 Start : Source_Ptr;
|
|
|
475
|
|
|
476 begin
|
|
|
477 Unit := Empty;
|
|
|
478
|
|
|
479 -- Loop through components of name, building up Unit
|
|
|
480
|
|
|
481 loop
|
|
|
482 Start := P;
|
|
|
483 while System_Text (P) /= '.'
|
|
|
484 and then
|
|
|
485 System_Text (P) /= ')'
|
|
|
486 loop
|
|
|
487 P := P + 1;
|
|
|
488 end loop;
|
|
|
489
|
|
|
490 Id := Make_Id (System_Text (Start .. P - 1));
|
|
|
491
|
|
|
492 -- If first name, just capture the identifier
|
|
|
493
|
|
|
494 if Unit = Empty then
|
|
|
495 Unit := Id;
|
|
|
496 else
|
|
|
497 Unit := Make_SC (Unit, Id);
|
|
|
498 end if;
|
|
|
499
|
|
|
500 exit when System_Text (P) = ')';
|
|
|
501 P := P + 1;
|
|
|
502 end loop;
|
|
|
503
|
|
|
504 Set_NOD (Unit);
|
|
|
505 goto Line_Loop_Continue;
|
|
|
506 end;
|
|
|
507
|
|
|
508 -- No_Specification_Of_Aspect case
|
|
|
509
|
|
|
510 elsif Looking_At_Skip ("No_Specification_Of_Aspect => ") then
|
|
|
511 -- Skip this processing (and simply ignore the pragma), if
|
|
|
512 -- caller did not supply the subprogram we need to process
|
|
|
513 -- such lines.
|
|
|
514
|
|
|
515 if Set_NSA = null then
|
|
|
516 goto Line_Loop_Continue;
|
|
|
517 end if;
|
|
|
518
|
|
|
519 -- We have scanned
|
|
|
520 -- "pragma Restrictions (No_Specification_Of_Aspect =>"
|
|
|
521
|
|
|
522 Collect_Name;
|
|
|
523
|
|
|
524 if System_Text (P) /= ')' then
|
|
|
525 goto Bad_Restrictions_Pragma;
|
|
|
526
|
|
|
527 else
|
|
|
528 Set_NSA (Name_Find, OK);
|
|
|
529
|
|
|
530 if OK then
|
|
|
531 goto Line_Loop_Continue;
|
|
|
532 else
|
|
|
533 goto Bad_Restrictions_Pragma;
|
|
|
534 end if;
|
|
|
535 end if;
|
|
|
536
|
|
|
537 -- No_Use_Of_Attribute case
|
|
|
538
|
|
|
539 elsif Looking_At_Skip ("No_Use_Of_Attribute => ") then
|
|
|
540 -- Skip this processing (and simply ignore No_Use_Of_Attribute
|
|
|
541 -- lines) if caller did not supply the subprogram we need to
|
|
|
542 -- process such lines.
|
|
|
543
|
|
|
544 if Set_NUA = null then
|
|
|
545 goto Line_Loop_Continue;
|
|
|
546 end if;
|
|
|
547
|
|
|
548 -- We have scanned
|
|
|
549 -- "pragma Restrictions (No_Use_Of_Attribute =>"
|
|
|
550
|
|
|
551 Collect_Name;
|
|
|
552
|
|
|
553 if System_Text (P) /= ')' then
|
|
|
554 goto Bad_Restrictions_Pragma;
|
|
|
555
|
|
|
556 else
|
|
|
557 Set_NUA (Name_Find, OK);
|
|
|
558
|
|
|
559 if OK then
|
|
|
560 goto Line_Loop_Continue;
|
|
|
561 else
|
|
|
562 goto Bad_Restrictions_Pragma;
|
|
|
563 end if;
|
|
|
564 end if;
|
|
|
565
|
|
|
566 -- No_Use_Of_Pragma case
|
|
|
567
|
|
|
568 elsif Looking_At_Skip ("No_Use_Of_Pragma => ") then
|
|
|
569 -- Skip this processing (and simply ignore No_Use_Of_Pragma
|
|
|
570 -- lines) if caller did not supply the subprogram we need to
|
|
|
571 -- process such lines.
|
|
|
572
|
|
|
573 if Set_NUP = null then
|
|
|
574 goto Line_Loop_Continue;
|
|
|
575 end if;
|
|
|
576
|
|
|
577 -- We have scanned
|
|
|
578 -- "pragma Restrictions (No_Use_Of_Pragma =>"
|
|
|
579
|
|
|
580 Collect_Name;
|
|
|
581
|
|
|
582 if System_Text (P) /= ')' then
|
|
|
583 goto Bad_Restrictions_Pragma;
|
|
|
584
|
|
|
585 else
|
|
|
586 Set_NUP (Name_Find, OK);
|
|
|
587
|
|
|
588 if OK then
|
|
|
589 goto Line_Loop_Continue;
|
|
|
590 else
|
|
|
591 goto Bad_Restrictions_Pragma;
|
|
|
592 end if;
|
|
|
593 end if;
|
|
|
594 end if;
|
|
|
595
|
|
|
596 -- Here if unrecognizable restrictions pragma form
|
|
|
597
|
|
|
598 <<Bad_Restrictions_Pragma>>
|
|
|
599
|
|
|
600 Set_Standard_Error;
|
|
|
601 Write_Line
|
|
|
602 ("fatal error: system.ads is incorrectly formatted");
|
|
|
603 Write_Str ("unrecognized or incorrect restrictions pragma: ");
|
|
|
604
|
|
|
605 P := PR_Start;
|
|
|
606 loop
|
|
|
607 exit when System_Text (P) = ASCII.LF;
|
|
|
608 Write_Char (System_Text (P));
|
|
|
609 exit when System_Text (P) = ')';
|
|
|
610 P := P + 1;
|
|
|
611 end loop;
|
|
|
612
|
|
|
613 Write_Eol;
|
|
|
614 Fatal := True;
|
|
|
615 Set_Standard_Output;
|
|
|
616
|
|
|
617 -- Test for pragma Detect_Blocking;
|
|
|
618
|
|
|
619 elsif Looking_At_Skip ("pragma Detect_Blocking;") then
|
|
|
620 Opt.Detect_Blocking := True;
|
|
|
621 goto Line_Loop_Continue;
|
|
|
622
|
|
|
623 -- Discard_Names
|
|
|
624
|
|
|
625 elsif Looking_At_Skip ("pragma Discard_Names;") then
|
|
|
626 Opt.Global_Discard_Names := True;
|
|
|
627 goto Line_Loop_Continue;
|
|
|
628
|
|
|
629 -- Locking Policy
|
|
|
630
|
|
|
631 elsif Looking_At_Skip ("pragma Locking_Policy (") then
|
|
|
632 Opt.Locking_Policy := System_Text (P);
|
|
|
633 Opt.Locking_Policy_Sloc := System_Location;
|
|
|
634 goto Line_Loop_Continue;
|
|
|
635
|
|
|
636 -- Normalize_Scalars
|
|
|
637
|
|
|
638 elsif Looking_At_Skip ("pragma Normalize_Scalars;") then
|
|
|
639 Opt.Normalize_Scalars := True;
|
|
|
640 Opt.Init_Or_Norm_Scalars := True;
|
|
|
641 goto Line_Loop_Continue;
|
|
|
642
|
|
|
643 -- Partition_Elaboration_Policy
|
|
|
644
|
|
|
645 elsif Looking_At_Skip ("pragma Partition_Elaboration_Policy (") then
|
|
|
646 Opt.Partition_Elaboration_Policy := System_Text (P);
|
|
|
647 Opt.Partition_Elaboration_Policy_Sloc := System_Location;
|
|
|
648 goto Line_Loop_Continue;
|
|
|
649
|
|
|
650 -- Polling (On)
|
|
|
651
|
|
|
652 elsif Looking_At_Skip ("pragma Polling (On);") then
|
|
|
653 Opt.Polling_Required := True;
|
|
|
654 goto Line_Loop_Continue;
|
|
|
655
|
|
|
656 -- Queuing Policy
|
|
|
657
|
|
|
658 elsif Looking_At_Skip ("pragma Queuing_Policy (") then
|
|
|
659 Opt.Queuing_Policy := System_Text (P);
|
|
|
660 Opt.Queuing_Policy_Sloc := System_Location;
|
|
|
661 goto Line_Loop_Continue;
|
|
|
662
|
|
|
663 -- Suppress_Exception_Locations
|
|
|
664
|
|
|
665 elsif Looking_At_Skip ("pragma Suppress_Exception_Locations;") then
|
|
|
666 Opt.Exception_Locations_Suppressed := True;
|
|
|
667 goto Line_Loop_Continue;
|
|
|
668
|
|
|
669 -- Task_Dispatching Policy
|
|
|
670
|
|
|
671 elsif Looking_At_Skip ("pragma Task_Dispatching_Policy (") then
|
|
|
672 Opt.Task_Dispatching_Policy := System_Text (P);
|
|
|
673 Opt.Task_Dispatching_Policy_Sloc := System_Location;
|
|
|
674 goto Line_Loop_Continue;
|
|
|
675
|
|
|
676 -- No other configuration pragmas are permitted
|
|
|
677
|
|
|
678 elsif Looking_At ("pragma ") then
|
|
|
679 -- Special exception, we allow pragma Pure (System) appearing in
|
|
|
680 -- column one. This is an obsolete usage which may show up in old
|
|
|
681 -- tests with an obsolete version of system.ads, so we recognize
|
|
|
682 -- and ignore it to make life easier in handling such tests.
|
|
|
683
|
|
|
684 if Looking_At_Skip ("pragma Pure (System);") then
|
|
|
685 goto Line_Loop_Continue;
|
|
|
686 end if;
|
|
|
687
|
|
|
688 Set_Standard_Error;
|
|
|
689 Write_Line ("unrecognized line in system.ads: ");
|
|
|
690
|
|
|
691 while System_Text (P) /= ')'
|
|
|
692 and then System_Text (P) /= ASCII.LF
|
|
|
693 loop
|
|
|
694 Write_Char (System_Text (P));
|
|
|
695 P := P + 1;
|
|
|
696 end loop;
|
|
|
697
|
|
|
698 Write_Eol;
|
|
|
699 Set_Standard_Output;
|
|
|
700 Fatal := True;
|
|
|
701
|
|
|
702 -- See if we have a Run_Time_Name
|
|
|
703
|
|
|
704 elsif Looking_At_Skip
|
|
|
705 (" Run_Time_Name : constant String := """)
|
|
|
706 then
|
|
|
707 Name_Len := 0;
|
|
|
708 while System_Text (P) in 'A' .. 'Z'
|
|
|
709 or else
|
|
|
710 System_Text (P) in 'a' .. 'z'
|
|
|
711 or else
|
|
|
712 System_Text (P) in '0' .. '9'
|
|
|
713 or else
|
|
|
714 System_Text (P) = ' '
|
|
|
715 or else
|
|
|
716 System_Text (P) = '_'
|
|
|
717 loop
|
|
|
718 Add_Char_To_Name_Buffer (System_Text (P));
|
|
|
719 P := P + 1;
|
|
|
720 end loop;
|
|
|
721
|
|
|
722 if System_Text (P) /= '"'
|
|
|
723 or else System_Text (P + 1) /= ';'
|
|
|
724 or else (System_Text (P + 2) /= ASCII.LF
|
|
|
725 and then
|
|
|
726 System_Text (P + 2) /= ASCII.CR)
|
|
|
727 then
|
|
|
728 Set_Standard_Error;
|
|
|
729 Write_Line
|
|
|
730 ("incorrectly formatted Run_Time_Name in system.ads");
|
|
|
731 Set_Standard_Output;
|
|
|
732 Fatal := True;
|
|
|
733
|
|
|
734 else
|
|
|
735 Run_Time_Name_On_Target := Name_Enter;
|
|
|
736 end if;
|
|
|
737
|
|
|
738 goto Line_Loop_Continue;
|
|
|
739
|
|
|
740 -- See if we have an Executable_Extension
|
|
|
741
|
|
|
742 elsif Looking_At_Skip
|
|
|
743 (" Executable_Extension : constant String := """)
|
|
|
744 then
|
|
|
745 Name_Len := 0;
|
|
|
746 while System_Text (P) /= '"'
|
|
|
747 and then System_Text (P) /= ASCII.LF
|
|
|
748 loop
|
|
|
749 Add_Char_To_Name_Buffer (System_Text (P));
|
|
|
750 P := P + 1;
|
|
|
751 end loop;
|
|
|
752
|
|
|
753 if System_Text (P) /= '"' or else System_Text (P + 1) /= ';' then
|
|
|
754 Set_Standard_Error;
|
|
|
755 Write_Line
|
|
|
756 ("incorrectly formatted Executable_Extension in system.ads");
|
|
|
757 Set_Standard_Output;
|
|
|
758 Fatal := True;
|
|
|
759
|
|
|
760 else
|
|
|
761 Executable_Extension_On_Target := Name_Enter;
|
|
|
762 end if;
|
|
|
763
|
|
|
764 goto Line_Loop_Continue;
|
|
|
765
|
|
|
766 -- Next see if we have a configuration parameter
|
|
|
767
|
|
|
768 else
|
|
|
769 Config_Param_Loop : for K in Targparm_Tags loop
|
|
|
770 if Looking_At_Skip (" " & Targparm_Str (K).all) then
|
|
|
771 if Targparm_Flags (K) then
|
|
|
772 Set_Standard_Error;
|
|
|
773 Write_Line
|
|
|
774 ("fatal error: system.ads is incorrectly formatted");
|
|
|
775 Write_Str ("duplicate line for parameter: ");
|
|
|
776
|
|
|
777 for J in Targparm_Str (K)'Range loop
|
|
|
778 Write_Char (Targparm_Str (K).all (J));
|
|
|
779 end loop;
|
|
|
780
|
|
|
781 Write_Eol;
|
|
|
782 Set_Standard_Output;
|
|
|
783 Fatal := True;
|
|
|
784
|
|
|
785 else
|
|
|
786 Targparm_Flags (K) := True;
|
|
|
787 end if;
|
|
|
788
|
|
|
789 while System_Text (P) /= ':'
|
|
|
790 or else System_Text (P + 1) /= '='
|
|
|
791 loop
|
|
|
792 P := P + 1;
|
|
|
793 end loop;
|
|
|
794
|
|
|
795 P := P + 2;
|
|
|
796
|
|
|
797 while System_Text (P) = ' ' loop
|
|
|
798 P := P + 1;
|
|
|
799 end loop;
|
|
|
800
|
|
|
801 Result := (System_Text (P) = 'T');
|
|
|
802
|
|
|
803 case K is
|
|
|
804 when AAM => null;
|
|
|
805 when ACR => Always_Compatible_Rep_On_Target := Result;
|
|
|
806 when ASD => Atomic_Sync_Default_On_Target := Result;
|
|
|
807 when BDC => Backend_Divide_Checks_On_Target := Result;
|
|
|
808 when BOC => Backend_Overflow_Checks_On_Target := Result;
|
|
|
809 when CLA => Command_Line_Args_On_Target := Result;
|
|
|
810 when CRT => Configurable_Run_Time_On_Target := Result;
|
|
|
811 when D32 => Duration_32_Bits_On_Target := Result;
|
|
|
812 when DEN => Denorm_On_Target := Result;
|
|
|
813 when EXS => Exit_Status_Supported_On_Target := Result;
|
|
|
814 when FEL => null;
|
|
|
815 when FEX => Frontend_Exceptions_On_Target := Result;
|
|
|
816 when FFO => Fractional_Fixed_Ops_On_Target := Result;
|
|
|
817 when MOV => Machine_Overflows_On_Target := Result;
|
|
|
818 when MRN => Machine_Rounds_On_Target := Result;
|
|
|
819 when PAS => Preallocated_Stacks_On_Target := Result;
|
|
|
820 when SAG => Support_Aggregates_On_Target := Result;
|
|
|
821 when SAP => Support_Atomic_Primitives_On_Target := Result;
|
|
|
822 when SCA => Support_Composite_Assign_On_Target := Result;
|
|
|
823 when SCC => Support_Composite_Compare_On_Target := Result;
|
|
|
824 when SCD => Stack_Check_Default_On_Target := Result;
|
|
|
825 when SCL => Stack_Check_Limits_On_Target := Result;
|
|
|
826 when SCP => Stack_Check_Probes_On_Target := Result;
|
|
|
827 when SLS => Support_Long_Shifts_On_Target := Result;
|
|
|
828 when SSL => Suppress_Standard_Library_On_Target := Result;
|
|
|
829 when SNZ => Signed_Zeros_On_Target := Result;
|
|
|
830 when UAM => Use_Ada_Main_Program_Name_On_Target := Result;
|
|
|
831 when ZCX => ZCX_By_Default_On_Target := Result;
|
|
|
832
|
|
|
833 goto Line_Loop_Continue;
|
|
|
834 end case;
|
|
|
835
|
|
|
836 -- Here we are seeing a parameter we do not understand. We
|
|
|
837 -- simply ignore this (will happen when an old compiler is
|
|
|
838 -- used to compile a newer version of GNAT which does not
|
|
|
839 -- support the parameter).
|
|
|
840 end if;
|
|
|
841 end loop Config_Param_Loop;
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|
|
842 end if;
|
|
|
843
|
|
|
844 -- Here after processing one line of System spec
|
|
|
845
|
|
|
846 <<Line_Loop_Continue>>
|
|
|
847
|
|
|
848 while P < Source_Last
|
|
|
849 and then System_Text (P) /= CR
|
|
|
850 and then System_Text (P) /= LF
|
|
|
851 loop
|
|
|
852 P := P + 1;
|
|
|
853 end loop;
|
|
|
854
|
|
|
855 while P < Source_Last
|
|
|
856 and then (System_Text (P) = CR
|
|
|
857 or else System_Text (P) = LF)
|
|
|
858 loop
|
|
|
859 P := P + 1;
|
|
|
860 end loop;
|
|
|
861
|
|
|
862 if P >= Source_Last then
|
|
|
863 Set_Standard_Error;
|
|
|
864 Write_Line ("fatal error, system.ads not formatted correctly");
|
|
|
865 Write_Line ("unexpected end of file");
|
|
|
866 Set_Standard_Output;
|
|
|
867 raise Unrecoverable_Error;
|
|
|
868 end if;
|
|
|
869 end loop;
|
|
|
870
|
|
|
871 if Fatal then
|
|
|
872 raise Unrecoverable_Error;
|
|
|
873 end if;
|
|
|
874 end Get_Target_Parameters;
|
|
|
875
|
|
|
876 ------------------------------
|
|
|
877 -- Set_Profile_Restrictions --
|
|
|
878 ------------------------------
|
|
|
879
|
|
|
880 procedure Set_Profile_Restrictions (P : Profile_Name) is
|
|
|
881 R : Restriction_Flags renames Profile_Info (P).Set;
|
|
|
882 V : Restriction_Values renames Profile_Info (P).Value;
|
|
|
883 begin
|
|
|
884 for J in R'Range loop
|
|
|
885 if R (J) then
|
|
|
886 Restrictions_On_Target.Set (J) := True;
|
|
|
887
|
|
|
888 if J in All_Parameter_Restrictions then
|
|
|
889 Restrictions_On_Target.Value (J) := V (J);
|
|
|
890 end if;
|
|
|
891 end if;
|
|
|
892 end loop;
|
|
|
893 end Set_Profile_Restrictions;
|
|
|
894
|
|
|
895 end Targparm;
|
