sim/common/sim-config.c

   1 /* The common simulator framework for GDB, the GNU Debugger.
   2
   3    Copyright 2002-2020 Free Software Foundation, Inc.
   4
   5    Contributed by Andrew Cagney and Red Hat.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23 #include "sim-main.h"
  24 #include "sim-assert.h"
  25 #include "bfd.h"
  26
  27
  28 enum bfd_endian current_target_byte_order = BFD_ENDIAN_UNKNOWN;
  29 int current_stdio;
  30
  31 enum sim_alignments current_alignment;
  32
  33 #if defined (WITH_FLOATING_POINT)
  34 int current_floating_point;
  35 #endif
  36
  37
  38
  39 /* map a byte order onto a textual string */
  40
  41 static const char *
  42 config_byte_order_to_a (enum bfd_endian byte_order)
  43 {
  44   switch (byte_order)
  45     {
  46     case BFD_ENDIAN_LITTLE:
  47       return "LITTLE_ENDIAN";
  48     case BFD_ENDIAN_BIG:
  49       return "BIG_ENDIAN";
  50     case BFD_ENDIAN_UNKNOWN:
  51       return "UNKNOWN_ENDIAN";
  52     }
  53   return "UNKNOWN";
  54 }
  55
  56
  57 static const char *
  58 config_stdio_to_a (int stdio)
  59 {
  60   switch (stdio)
  61     {
  62     case DONT_USE_STDIO:
  63       return "DONT_USE_STDIO";
  64     case DO_USE_STDIO:
  65       return "DO_USE_STDIO";
  66     case 0:
  67       return "0";
  68     }
  69   return "UNKNOWN";
  70 }
  71
  72
  73 static const char *
  74 config_environment_to_a (enum sim_environment environment)
  75 {
  76   switch (environment)
  77     {
  78     case ALL_ENVIRONMENT:
  79       return "ALL_ENVIRONMENT";
  80     case USER_ENVIRONMENT:
  81       return "USER_ENVIRONMENT";
  82     case VIRTUAL_ENVIRONMENT:
  83       return "VIRTUAL_ENVIRONMENT";
  84     case OPERATING_ENVIRONMENT:
  85       return "OPERATING_ENVIRONMENT";
  86     }
  87   return "UNKNOWN";
  88 }
  89
  90
  91 static const char *
  92 config_alignment_to_a (enum sim_alignments alignment)
  93 {
  94   switch (alignment)
  95     {
  96     case MIXED_ALIGNMENT:
  97       return "MIXED_ALIGNMENT";
  98     case NONSTRICT_ALIGNMENT:
  99       return "NONSTRICT_ALIGNMENT";
 100     case STRICT_ALIGNMENT:
 101       return "STRICT_ALIGNMENT";
 102     case FORCED_ALIGNMENT:
 103       return "FORCED_ALIGNMENT";
 104     }
 105   return "UNKNOWN";
 106 }
 107
 108
 109 #if defined (WITH_FLOATING_POINT)
 110 static const char *
 111 config_floating_point_to_a (int floating_point)
 112 {
 113   switch (floating_point)
 114     {
 115     case SOFT_FLOATING_POINT:
 116       return "SOFT_FLOATING_POINT";
 117     case HARD_FLOATING_POINT:
 118       return "HARD_FLOATING_POINT";
 119     case 0:
 120       return "0";
 121     }
 122   return "UNKNOWN";
 123 }
 124 #endif
 125
 126 /* Set the default environment, prior to parsing argv.  */
 127
 128 void
 129 sim_config_default (SIM_DESC sd)
 130 {
 131    /* Set the current environment to ALL_ENVIRONMENT to indicate none has been
 132       selected yet.  This is so that after parsing argv, we know whether the
 133       environment was explicitly specified or not.  */
 134   STATE_ENVIRONMENT (sd) = ALL_ENVIRONMENT;
 135 }
 136
 137 /* Complete and verify the simulation environment.  */
 138
 139 SIM_RC
 140 sim_config (SIM_DESC sd)
 141 {
 142   enum bfd_endian prefered_target_byte_order;
 143   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 144
 145   /* extract all relevant information */
 146   if (STATE_PROG_BFD (sd) == NULL
 147       /* If we have a binary input file (presumably with specified
 148          "--architecture"), it'll have no endianness.  */
 149       || (!bfd_little_endian (STATE_PROG_BFD (sd))
 150           && !bfd_big_endian (STATE_PROG_BFD (sd))))
 151     prefered_target_byte_order = BFD_ENDIAN_UNKNOWN;
 152   else
 153     prefered_target_byte_order = (bfd_little_endian (STATE_PROG_BFD (sd))
 154                                   ? BFD_ENDIAN_LITTLE
 155                                   : BFD_ENDIAN_BIG);
 156
 157   /* set the target byte order */
 158 #if (WITH_TREE_PROPERTIES)
 159   if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
 160     current_target_byte_order
 161       = (tree_find_boolean_property (root, "/options/little-endian?")
 162          ? BFD_ENDIAN_LITTLE
 163          : BFD_ENDIAN_BIG);
 164 #endif
 165   if (current_target_byte_order == BFD_ENDIAN_UNKNOWN
 166       && prefered_target_byte_order != BFD_ENDIAN_UNKNOWN)
 167     current_target_byte_order = prefered_target_byte_order;
 168   if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
 169     current_target_byte_order = WITH_TARGET_BYTE_ORDER;
 170   if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
 171     current_target_byte_order = WITH_DEFAULT_TARGET_BYTE_ORDER;
 172
 173   /* verify the target byte order */
 174   if (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_UNKNOWN)
 175     {
 176       sim_io_eprintf (sd, "Target byte order unspecified\n");
 177       return SIM_RC_FAIL;
 178     }
 179   if (CURRENT_TARGET_BYTE_ORDER != current_target_byte_order)
 180     sim_io_eprintf (sd, "Target (%s) and configured (%s) byte order in conflict\n",
 181                   config_byte_order_to_a (current_target_byte_order),
 182                   config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER));
 183   if (prefered_target_byte_order != BFD_ENDIAN_UNKNOWN
 184       && CURRENT_TARGET_BYTE_ORDER != prefered_target_byte_order)
 185     sim_io_eprintf (sd, "Target (%s) and specified (%s) byte order in conflict\n",
 186                   config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER),
 187                   config_byte_order_to_a (prefered_target_byte_order));
 188
 189
 190   /* set the stdio */
 191   if (current_stdio == 0)
 192     current_stdio = WITH_STDIO;
 193   if (current_stdio == 0)
 194     current_stdio = DO_USE_STDIO;
 195
 196   /* verify the stdio */
 197   if (CURRENT_STDIO == 0)
 198     {
 199       sim_io_eprintf (sd, "Target standard IO unspecified\n");
 200       return SIM_RC_FAIL;
 201     }
 202   if (CURRENT_STDIO != current_stdio)
 203     {
 204       sim_io_eprintf (sd, "Target (%s) and configured (%s) standard IO in conflict\n",
 205                       config_stdio_to_a (CURRENT_STDIO),
 206                       config_stdio_to_a (current_stdio));
 207       return SIM_RC_FAIL;
 208     }
 209
 210
 211   /* check the value of MSB */
 212   if (WITH_TARGET_WORD_MSB != 0
 213       && WITH_TARGET_WORD_MSB != (WITH_TARGET_WORD_BITSIZE - 1))
 214     {
 215       sim_io_eprintf (sd, "Target bitsize (%d) contradicts target most significant bit (%d)\n",
 216                       WITH_TARGET_WORD_BITSIZE, WITH_TARGET_WORD_MSB);
 217       return SIM_RC_FAIL;
 218     }
 219
 220
 221   /* set the environment */
 222 #if (WITH_TREE_PROPERTIES)
 223   if (STATE_ENVIRONMENT (sd) == ALL_ENVIRONMENT)
 224     {
 225       const char *env =
 226         tree_find_string_property (root, "/openprom/options/env");
 227       STATE_ENVIRONMENT (sd) = ((strcmp (env, "user") == 0
 228                                  || strcmp (env, "uea") == 0)
 229                                 ? USER_ENVIRONMENT
 230                                 : (strcmp (env, "virtual") == 0
 231                                    || strcmp (env, "vea") == 0)
 232                                 ? VIRTUAL_ENVIRONMENT
 233                                 : (strcmp (env, "operating") == 0
 234                                    || strcmp (env, "oea") == 0)
 235                                 ? OPERATING_ENVIRONMENT
 236                                 : ALL_ENVIRONMENT);
 237     }
 238 #endif
 239   if (STATE_ENVIRONMENT (sd) == ALL_ENVIRONMENT)
 240     STATE_ENVIRONMENT (sd) = (WITH_ENVIRONMENT != ALL_ENVIRONMENT ?
 241                               WITH_ENVIRONMENT : USER_ENVIRONMENT);
 242
 243
 244   /* set the alignment */
 245 #if (WITH_TREE_PROPERTIES)
 246   if (current_alignment == 0)
 247     current_alignment =
 248       (tree_find_boolean_property (root, "/openprom/options/strict-alignment?")
 249        ? STRICT_ALIGNMENT
 250        : NONSTRICT_ALIGNMENT);
 251 #endif
 252   if (current_alignment == 0)
 253     current_alignment = WITH_ALIGNMENT;
 254   if (current_alignment == 0)
 255     current_alignment = WITH_DEFAULT_ALIGNMENT;
 256
 257   /* verify the alignment */
 258   if (CURRENT_ALIGNMENT == 0)
 259     {
 260       sim_io_eprintf (sd, "Target alignment unspecified\n");
 261       return SIM_RC_FAIL;
 262     }
 263   if (CURRENT_ALIGNMENT != current_alignment)
 264     {
 265       sim_io_eprintf (sd, "Target (%s) and configured (%s) alignment in conflict\n",
 266                       config_alignment_to_a (CURRENT_ALIGNMENT),
 267                       config_alignment_to_a (current_alignment));
 268       return SIM_RC_FAIL;
 269     }
 270
 271 #if defined (WITH_FLOATING_POINT)
 272
 273   /* set the floating point */
 274   if (current_floating_point == 0)
 275     current_floating_point = WITH_FLOATING_POINT;
 276
 277   /* verify the floating point */
 278   if (CURRENT_FLOATING_POINT == 0)
 279     {
 280       sim_io_eprintf (sd, "Target floating-point unspecified\n");
 281       return SIM_RC_FAIL;
 282     }
 283   if (CURRENT_FLOATING_POINT != current_floating_point)
 284     {
 285       sim_io_eprintf (sd, "Target (%s) and configured (%s) floating-point in conflict\n",
 286                       config_alignment_to_a (CURRENT_FLOATING_POINT),
 287                       config_alignment_to_a (current_floating_point));
 288       return SIM_RC_FAIL;
 289     }
 290
 291 #endif
 292   return SIM_RC_OK;
 293 }
 294
 295
 296 void
 297 print_sim_config (SIM_DESC sd)
 298 {
 299   sim_io_printf (sd, "WITH_TARGET_BYTE_ORDER = %s\n",
 300                  config_byte_order_to_a (WITH_TARGET_BYTE_ORDER));
 301
 302   sim_io_printf (sd, "WITH_DEFAULT_TARGET_BYTE_ORDER = %s\n",
 303                  config_byte_order_to_a (WITH_DEFAULT_TARGET_BYTE_ORDER));
 304
 305   sim_io_printf (sd, "HOST_BYTE_ORDER = %s\n",
 306                  config_byte_order_to_a (HOST_BYTE_ORDER));
 307
 308   sim_io_printf (sd, "WITH_STDIO = %s\n",
 309                  config_stdio_to_a (WITH_STDIO));
 310
 311   sim_io_printf (sd, "WITH_TARGET_WORD_MSB = %d\n",
 312                  WITH_TARGET_WORD_MSB);
 313
 314   sim_io_printf (sd, "WITH_TARGET_WORD_BITSIZE = %d\n",
 315                  WITH_TARGET_WORD_BITSIZE);
 316
 317   sim_io_printf (sd, "WITH_TARGET_ADDRESS_BITSIZE = %d\n",
 318                  WITH_TARGET_ADDRESS_BITSIZE);
 319
 320   sim_io_printf (sd, "WITH_TARGET_CELL_BITSIZE = %d\n",
 321                  WITH_TARGET_CELL_BITSIZE);
 322
 323   sim_io_printf (sd, "WITH_TARGET_FLOATING_POINT_BITSIZE = %d\n",
 324                  WITH_TARGET_FLOATING_POINT_BITSIZE);
 325
 326   sim_io_printf (sd, "WITH_ENVIRONMENT = %s\n",
 327                  config_environment_to_a (WITH_ENVIRONMENT));
 328
 329   sim_io_printf (sd, "WITH_ALIGNMENT = %s\n",
 330                  config_alignment_to_a (WITH_ALIGNMENT));
 331
 332 #if defined (WITH_DEFAULT_ALIGNMENT)
 333   sim_io_printf (sd, "WITH_DEFAULT_ALIGNMENT = %s\n",
 334                  config_alignment_to_a (WITH_DEFAULT_ALIGNMENT));
 335 #endif
 336
 337 #if defined (WITH_XOR_ENDIAN)
 338   sim_io_printf (sd, "WITH_XOR_ENDIAN = %d\n", WITH_XOR_ENDIAN);
 339 #endif
 340
 341 #if defined (WITH_FLOATING_POINT)
 342   sim_io_printf (sd, "WITH_FLOATING_POINT = %s\n",
 343                  config_floating_point_to_a (WITH_FLOATING_POINT));
 344 #endif
 345
 346 #if defined (WITH_SMP)
 347   sim_io_printf (sd, "WITH_SMP = %d\n", WITH_SMP);
 348 #endif
 349
 350 #if defined (WITH_RESERVED_BITS)
 351   sim_io_printf (sd, "WITH_RESERVED_BITS = %d\n", WITH_RESERVED_BITS);
 352 #endif
 353
 354 #if defined (WITH_PROFILE)
 355   sim_io_printf (sd, "WITH_PROFILE = %d\n", WITH_PROFILE);
 356 #endif
 357
 358 }