sim/common/sim-memopt.c

   1 /* Simulator memory option handling.
   2    Copyright (C) 1996-1999 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "sim-main.h"
  22 #include "sim-assert.h"
  23 #include "sim-options.h"
  24
  25 #ifdef HAVE_STRING_H
  26 #include <string.h>
  27 #else
  28 #ifdef HAVE_STRINGS_H
  29 #include <strings.h>
  30 #endif
  31 #endif
  32 #ifdef HAVE_STDLIB_H
  33 #include <stdlib.h>
  34 #endif
  35
  36 /* Memory fill byte */
  37 static unsigned8 fill_byte_value;
  38 static int fill_byte_flag = 0;
  39
  40 /* Memory command line options. */
  41
  42 enum {
  43   OPTION_MEMORY_DELETE = OPTION_START,
  44   OPTION_MEMORY_REGION,
  45   OPTION_MEMORY_SIZE,
  46   OPTION_MEMORY_INFO,
  47   OPTION_MEMORY_ALIAS,
  48   OPTION_MEMORY_CLEAR,
  49   OPTION_MEMORY_FILL
  50 };
  51
  52 static DECLARE_OPTION_HANDLER (memory_option_handler);
  53
  54 static const OPTION memory_options[] =
  55 {
  56   { {"memory-delete", required_argument, NULL, OPTION_MEMORY_DELETE },
  57       '\0', "ADDRESS|all", "Delete memory at ADDRESS (all addresses)",
  58       memory_option_handler },
  59   { {"delete-memory", required_argument, NULL, OPTION_MEMORY_DELETE },
  60       '\0', "ADDRESS", NULL,
  61       memory_option_handler },
  62
  63   { {"memory-region", required_argument, NULL, OPTION_MEMORY_REGION },
  64       '\0', "ADDRESS,SIZE[,MODULO]", "Add a memory region",
  65       memory_option_handler },
  66
  67   { {"memory-alias", required_argument, NULL, OPTION_MEMORY_ALIAS },
  68       '\0', "ADDRESS,SIZE{,ADDRESS}", "Add memory shadow",
  69       memory_option_handler },
  70
  71   { {"memory-size", required_argument, NULL, OPTION_MEMORY_SIZE },
  72       '\0', "SIZE", "Add memory at address zero",
  73       memory_option_handler },
  74
  75   { {"memory-fill", required_argument, NULL, OPTION_MEMORY_FILL },
  76       '\0', "VALUE", "Fill subsequently added memory regions",
  77       memory_option_handler },
  78
  79   { {"memory-clear", no_argument, NULL, OPTION_MEMORY_CLEAR },
  80       '\0', NULL, "Clear subsequently added memory regions",
  81       memory_option_handler },
  82
  83   { {"memory-info", no_argument, NULL, OPTION_MEMORY_INFO },
  84       '\0', NULL, "List configurable memory regions",
  85       memory_option_handler },
  86   { {"info-memory", no_argument, NULL, OPTION_MEMORY_INFO },
  87       '\0', NULL, NULL,
  88       memory_option_handler },
  89
  90   { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
  91 };
  92
  93
  94 static sim_memopt *
  95 do_memopt_add (SIM_DESC sd,
  96                int level,
  97                int space,
  98                address_word addr,
  99                address_word nr_bytes,
 100                unsigned modulo,
 101                sim_memopt **entry,
 102                void *buffer)
 103 {
 104   void *fill_buffer;
 105   unsigned fill_length;
 106   void *free_buffer;
 107
 108   if (buffer != NULL)
 109     {
 110       /* Buffer already given.  sim_memory_uninstall will free it. */
 111       sim_core_attach (sd, NULL,
 112                        level, access_read_write_exec, space,
 113                        addr, nr_bytes, modulo, NULL, buffer);
 114
 115       free_buffer = buffer;
 116       fill_buffer = buffer;
 117       fill_length = (modulo == 0) ? nr_bytes : modulo;
 118     }
 119   else
 120     {
 121       /* Allocate new well-aligned buffer, just as sim_core_attach(). */
 122       void *aligned_buffer;
 123       int padding = (addr % sizeof (unsigned64));
 124       unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
 125
 126       /* If filling with non-zero value, do not use clearing allocator. */
 127
 128       if (fill_byte_flag && fill_byte_value != 0)
 129         free_buffer = xmalloc (bytes); /* don't clear */
 130       else
 131         free_buffer = zalloc (bytes); /* clear */
 132
 133       aligned_buffer = (char*) free_buffer + padding;
 134
 135       sim_core_attach (sd, NULL,
 136                        level, access_read_write_exec, space,
 137                        addr, nr_bytes, modulo, NULL, aligned_buffer);
 138
 139       fill_buffer = aligned_buffer;
 140       fill_length = (modulo == 0) ? nr_bytes : modulo;
 141
 142       /* If we just used a clearing allocator, and are about to fill with
 143          zero, truncate the redundant fill operation. */
 144
 145       if (fill_byte_flag && fill_byte_value == 0)
 146          fill_length = 1; /* avoid boundary length=0 case */
 147     }
 148
 149   if (fill_byte_flag)
 150     {
 151       ASSERT (fill_buffer != 0);
 152       memset ((char*) fill_buffer, fill_byte_value, fill_length);
 153     }
 154
 155   while ((*entry) != NULL)
 156     entry = &(*entry)->next;
 157   (*entry) = ZALLOC (sim_memopt);
 158   (*entry)->level = level;
 159   (*entry)->space = space;
 160   (*entry)->addr = addr;
 161   (*entry)->nr_bytes = nr_bytes;
 162   (*entry)->modulo = modulo;
 163   (*entry)->buffer = free_buffer;
 164
 165   return (*entry);
 166 }
 167
 168 static SIM_RC
 169 do_memopt_delete (SIM_DESC sd,
 170                   int level,
 171                   int space,
 172                   address_word addr)
 173 {
 174   sim_memopt **entry = &STATE_MEMOPT (sd);
 175   sim_memopt *alias;
 176   while ((*entry) != NULL
 177          && ((*entry)->level != level
 178               || (*entry)->space != space
 179               || (*entry)->addr != addr))
 180     entry = &(*entry)->next;
 181   if ((*entry) == NULL)
 182     {
 183       sim_io_eprintf (sd, "Memory at 0x%lx not found, not deleted\n",
 184                       (long) addr);
 185       return SIM_RC_FAIL;
 186     }
 187   /* delete any buffer */
 188   if ((*entry)->buffer != NULL)
 189     zfree ((*entry)->buffer);
 190   /* delete it and its aliases */
 191   alias = *entry;
 192   *entry = (*entry)->next;
 193   while (alias != NULL)
 194     {
 195       sim_memopt *dead = alias;
 196       alias = alias->alias;
 197       sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
 198       zfree (dead);
 199     }
 200   return SIM_RC_OK;
 201 }
 202
 203
 204 static char *
 205 parse_size (char *chp,
 206             address_word *nr_bytes,
 207             unsigned *modulo)
 208 {
 209   /* <nr_bytes> [ "%" <modulo> ] */
 210   *nr_bytes = strtoul (chp, &chp, 0);
 211   if (*chp == '%')
 212     {
 213       *modulo = strtoul (chp + 1, &chp, 0);
 214     }
 215   return chp;
 216 }
 217
 218 static char *
 219 parse_ulong_value (char *chp,
 220                      unsigned long *value)
 221 {
 222   *value = strtoul (chp, &chp, 0);
 223   return chp;
 224 }
 225
 226 static char *
 227 parse_addr (char *chp,
 228             int *level,
 229             int *space,
 230             address_word *addr)
 231 {
 232   /* [ <space> ": " ] <addr> [ "@" <level> ] */
 233   *addr = (unsigned long) strtoul (chp, &chp, 0);
 234   if (*chp == ':')
 235     {
 236       *space = *addr;
 237       *addr = (unsigned long) strtoul (chp + 1, &chp, 0);
 238     }
 239   if (*chp == '@')
 240     {
 241       *level = strtoul (chp + 1, &chp, 0);
 242     }
 243   return chp;
 244 }
 245
 246
 247 static SIM_RC
 248 memory_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
 249                        char *arg, int is_command)
 250 {
 251   switch (opt)
 252     {
 253
 254     case OPTION_MEMORY_DELETE:
 255       if (strcasecmp (arg, "all") == 0)
 256         {
 257           while (STATE_MEMOPT (sd) != NULL)
 258             do_memopt_delete (sd,
 259                               STATE_MEMOPT (sd)->level,
 260                               STATE_MEMOPT (sd)->space,
 261                               STATE_MEMOPT (sd)->addr);
 262           return SIM_RC_OK;
 263         }
 264       else
 265         {
 266           int level = 0;
 267           int space = 0;
 268           address_word addr = 0;
 269           parse_addr (arg, &level, &space, &addr);
 270           return do_memopt_delete (sd, level, space, addr);
 271         }
 272
 273     case OPTION_MEMORY_REGION:
 274       {
 275         char *chp = arg;
 276         int level = 0;
 277         int space = 0;
 278         address_word addr = 0;
 279         address_word nr_bytes = 0;
 280         unsigned modulo = 0;
 281         /* parse the arguments */
 282         chp = parse_addr (chp, &level, &space, &addr);
 283         if (*chp != ',')
 284           {
 285             sim_io_eprintf (sd, "Missing size for memory-region\n");
 286             return SIM_RC_FAIL;
 287           }
 288         chp = parse_size (chp + 1, &nr_bytes, &modulo);
 289         /* old style */
 290         if (*chp == ',')
 291           modulo = strtoul (chp + 1, &chp, 0);
 292         /* try to attach/insert it */
 293         do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
 294                        &STATE_MEMOPT (sd), NULL);
 295         return SIM_RC_OK;
 296       }
 297
 298     case OPTION_MEMORY_ALIAS:
 299       {
 300         char *chp = arg;
 301         int level = 0;
 302         int space = 0;
 303         address_word addr = 0;
 304         address_word nr_bytes = 0;
 305         unsigned modulo = 0;
 306         sim_memopt *entry;
 307         /* parse the arguments */
 308         chp = parse_addr (chp, &level, &space, &addr);
 309         if (*chp != ',')
 310           {
 311             sim_io_eprintf (sd, "Missing size for memory-region\n");
 312             return SIM_RC_FAIL;
 313           }
 314         chp = parse_size (chp + 1, &nr_bytes, &modulo);
 315         /* try to attach/insert the main record */
 316         entry = do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
 317                                &STATE_MEMOPT (sd),
 318                                NULL);
 319         /* now attach all the aliases */
 320         while (*chp == ',')
 321           {
 322             int a_level = level;
 323             int a_space = space;
 324             address_word a_addr = addr;
 325             chp = parse_addr (chp + 1, &a_level, &a_space, &a_addr);
 326             do_memopt_add (sd, a_level, a_space, a_addr, nr_bytes, modulo,
 327                            &entry->alias, entry->buffer);
 328           }
 329         return SIM_RC_OK;
 330       }
 331
 332     case OPTION_MEMORY_SIZE:
 333       {
 334         int level = 0;
 335         int space = 0;
 336         address_word addr = 0;
 337         address_word nr_bytes = 0;
 338         unsigned modulo = 0;
 339         /* parse the arguments */
 340         parse_size (arg, &nr_bytes, &modulo);
 341         /* try to attach/insert it */
 342         do_memopt_add (sd, level, space, addr, nr_bytes, modulo,
 343                        &STATE_MEMOPT (sd), NULL);
 344         return SIM_RC_OK;
 345       }
 346
 347     case OPTION_MEMORY_CLEAR:
 348       {
 349         fill_byte_value = (unsigned8) 0;
 350         fill_byte_flag = 1;
 351         return SIM_RC_OK;
 352         break;
 353       }
 354
 355     case OPTION_MEMORY_FILL:
 356       {
 357         unsigned long fill_value;
 358         parse_ulong_value (arg, &fill_value);
 359         if (fill_value > 255)
 360           {
 361             sim_io_eprintf (sd, "Missing fill value between 0 and 255\n");
 362             return SIM_RC_FAIL;
 363           }
 364         fill_byte_value = (unsigned8) fill_value;
 365         fill_byte_flag = 1;
 366         return SIM_RC_OK;
 367         break;
 368       }
 369
 370     case OPTION_MEMORY_INFO:
 371       {
 372         sim_memopt *entry;
 373         sim_io_printf (sd, "Memory maps:\n");
 374         for (entry = STATE_MEMOPT (sd); entry != NULL; entry = entry->next)
 375           {
 376             sim_memopt *alias;
 377             sim_io_printf (sd, " memory");
 378             if (entry->alias == NULL)
 379               sim_io_printf (sd, " region ");
 380             else
 381               sim_io_printf (sd, " alias ");
 382             if (entry->space != 0)
 383               sim_io_printf (sd, "0x%lx:", (long) entry->space);
 384             sim_io_printf (sd, "0x%08lx", (long) entry->addr);
 385             if (entry->level != 0)
 386               sim_io_printf (sd, "@0x%lx", (long) entry->level);
 387             sim_io_printf (sd, ",0x%lx",
 388                            (long) entry->nr_bytes);
 389             if (entry->modulo != 0)
 390               sim_io_printf (sd, "%%0x%lx", (long) entry->modulo);
 391             for (alias = entry->alias;
 392                  alias != NULL;
 393                  alias = alias->next)
 394               {
 395                 if (alias->space != 0)
 396                   sim_io_printf (sd, "0x%lx:", (long) alias->space);
 397                 sim_io_printf (sd, ",0x%08lx", (long) alias->addr);
 398                 if (alias->level != 0)
 399                   sim_io_printf (sd, "@0x%lx", (long) alias->level);
 400               }
 401             sim_io_printf (sd, "\n");
 402           }
 403         return SIM_RC_OK;
 404         break;
 405       }
 406
 407     default:
 408       sim_io_eprintf (sd, "Unknown memory option %d\n", opt);
 409       return SIM_RC_FAIL;
 410
 411     }
 412
 413   return SIM_RC_FAIL;
 414 }
 415
 416
 417 /* "memory" module install handler.
 418
 419    This is called via sim_module_install to install the "memory" subsystem
 420    into the simulator.  */
 421
 422 static MODULE_INIT_FN sim_memory_init;
 423 static MODULE_UNINSTALL_FN sim_memory_uninstall;
 424
 425 SIM_RC
 426 sim_memopt_install (SIM_DESC sd)
 427 {
 428   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 429   sim_add_option_table (sd, NULL, memory_options);
 430   sim_module_add_uninstall_fn (sd, sim_memory_uninstall);
 431   sim_module_add_init_fn (sd, sim_memory_init);
 432   return SIM_RC_OK;
 433 }
 434
 435
 436 /* Uninstall the "memory" subsystem from the simulator.  */
 437
 438 static void
 439 sim_memory_uninstall (SIM_DESC sd)
 440 {
 441   sim_memopt **entry = &STATE_MEMOPT (sd);
 442   sim_memopt *alias;
 443
 444   while ((*entry) != NULL)
 445     {
 446       /* delete any buffer */
 447       if ((*entry)->buffer != NULL)
 448         zfree ((*entry)->buffer);
 449
 450       /* delete it and its aliases */
 451       alias = *entry;
 452       while (alias != NULL)
 453         {
 454           sim_memopt *dead = alias;
 455           alias = alias->alias;
 456           sim_core_detach (sd, NULL, dead->level, dead->space, dead->addr);
 457           zfree (dead);
 458         }
 459
 460       /* next victim */
 461       *entry = (*entry)->next;
 462     }
 463 }
 464
 465
 466 static SIM_RC
 467 sim_memory_init (SIM_DESC sd)
 468 {
 469   /* FIXME: anything needed? */
 470   return SIM_RC_OK;
 471 }