sim/common/sim-options.c

   1 /* Simulator option handling.
   2    Copyright (C) 1996, 1997 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 #ifdef HAVE_STRING_H
  23 #include <string.h>
  24 #else
  25 #ifdef HAVE_STRINGS_H
  26 #include <strings.h>
  27 #endif
  28 #endif
  29 #include "libiberty.h"
  30 #include "../libiberty/alloca-conf.h"
  31 #include "sim-options.h"
  32 #include "sim-io.h"
  33
  34 /* Add a set of options to the simulator.
  35    TABLE is an array of OPTIONS terminated by a NULL `opt.name' entry.
  36    This is intended to be called by modules in their `install' handler.  */
  37
  38 SIM_RC
  39 sim_add_option_table (sd, table)
  40      SIM_DESC sd;
  41      const OPTION *table;
  42 {
  43   struct option_list *ol = ((struct option_list *)
  44                             xmalloc (sizeof (struct option_list)));
  45
  46   /* Note: The list is constructed in the reverse order we're called so
  47      later calls will override earlier ones (in case that ever happens).
  48      This is the intended behaviour.  */
  49   ol->next = STATE_OPTIONS (sd);
  50   ol->options = table;
  51   STATE_OPTIONS (sd) = ol;
  52
  53   return SIM_RC_OK;
  54 }
  55
  56 /* Standard option table.
  57    Modules may specify additional ones.
  58    The caller of sim_parse_args may also specify additional options
  59    by calling sim_add_option_table first.  */
  60
  61 static DECLARE_OPTION_HANDLER (standard_option_handler);
  62
  63 /* FIXME: We shouldn't print in --help output options that aren't usable.
  64    Some fine tuning will be necessary.  One can either move less general
  65    options to another table or use a HAVE_FOO macro to ifdef out unavailable
  66    options.  */
  67
  68 /* ??? One might want to conditionally compile out the entries that
  69    aren't enabled.  There's a distinction, however, between options a
  70    simulator can't support and options that haven't been configured in.
  71    Certainly options a simulator can't support shouldn't appear in the
  72    output of --help.  Whether the same thing applies to options that haven't
  73    been configured in or not isn't something I can get worked up over.
  74    [Note that conditionally compiling them out might simply involve moving
  75    the option to another table.]
  76    If you decide to conditionally compile them out as well, delete this
  77    comment and add a comment saying that that is the rule.  */
  78
  79 #define OPTION_DEBUG_INSN       (OPTION_START + 0)
  80 #define OPTION_DEBUG_FILE       (OPTION_START + 1)
  81 #define OPTION_DO_COMMAND       (OPTION_START + 2)
  82
  83 static const OPTION standard_options[] =
  84 {
  85   { {"verbose", no_argument, NULL, 'v'},
  86       'v', NULL, "Verbose output",
  87       standard_option_handler },
  88
  89 #if defined (SIM_HAVE_BIENDIAN) /* ??? && WITH_TARGET_BYTE_ORDER == 0 */
  90   { {"endian", required_argument, NULL, 'E'},
  91       'E', "big|little", "Set endianness",
  92       standard_option_handler },
  93 #endif
  94
  95   { {"debug", no_argument, NULL, 'D'},
  96       'D', NULL, "Print debugging messages",
  97       standard_option_handler },
  98   { {"debug-insn", no_argument, NULL, OPTION_DEBUG_INSN},
  99       '\0', NULL, "Print instruction debugging messages",
 100       standard_option_handler },
 101   { {"debug-file", required_argument, NULL, OPTION_DEBUG_FILE},
 102       '\0', "FILE NAME", "Specify debugging output file",
 103       standard_option_handler },
 104
 105 #ifdef SIM_H8300 /* FIXME: Should be movable to h8300 dir.  */
 106   { {"h8300h", no_argument, NULL, 'h'},
 107       'h', NULL, "Indicate the CPU is h8/300h or h8/300s",
 108       standard_option_handler },
 109 #endif
 110
 111 #ifdef SIM_HAVE_FLATMEM
 112   { {"mem-size", required_argument, NULL, 'm'},
 113       'm', "MEMORY SIZE", "Specify memory size",
 114       standard_option_handler },
 115 #endif
 116
 117   { {"do-command", required_argument, NULL, OPTION_DO_COMMAND},
 118       '\0', "COMMAND", "Perform a builtin command",
 119       standard_option_handler },
 120
 121   { {"help", no_argument, NULL, 'H'},
 122       'H', NULL, "Print help information",
 123       standard_option_handler },
 124
 125   { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
 126 };
 127
 128 static SIM_RC
 129 standard_option_handler (sd, opt, arg)
 130      SIM_DESC sd;
 131      int opt;
 132      char *arg;
 133 {
 134   int i,n;
 135
 136   switch (opt)
 137     {
 138     case 'v' :
 139       STATE_VERBOSE_P (sd) = 1;
 140       break;
 141
 142 #ifdef SIM_HAVE_BIENDIAN
 143     case 'E' :
 144       if (strcmp (arg, "big") == 0)
 145         {
 146           if (WITH_TARGET_BYTE_ORDER == LITTLE_ENDIAN)
 147             {
 148               sim_io_eprintf (sd, "Simulator compiled for little endian only.\n");
 149               return SIM_RC_FAIL;
 150             }
 151           /* FIXME:wip: Need to set something in STATE_CONFIG.  */
 152         }
 153       else if (strcmp (arg, "little") == 0)
 154         {
 155           if (WITH_TARGET_BYTE_ORDER == BIG_ENDIAN)
 156             {
 157               sim_io_eprintf (sd, "Simulator compiled for big endian only.\n");
 158               return SIM_RC_FAIL;
 159             }
 160           /* FIXME:wip: Need to set something in STATE_CONFIG.  */
 161         }
 162       else
 163         {
 164           sim_io_eprintf (sd, "Invalid endian specification `%s'\n", arg);
 165           return SIM_RC_FAIL;
 166         }
 167       break;
 168 #endif
 169
 170     case 'D' :
 171       if (! WITH_DEBUG)
 172         sim_io_eprintf (sd, "Debugging not compiled in, `-D' ignored\n");
 173       else
 174         {
 175           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 176             for (i = 0; i < MAX_DEBUG_VALUES; ++i)
 177               CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[i] = 1;
 178         }
 179       break;
 180
 181     case OPTION_DEBUG_INSN :
 182       if (! WITH_DEBUG)
 183         sim_io_eprintf (sd, "Debugging not compiled in, `--debug-insn' ignored\n");
 184       else
 185         {
 186           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 187             CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[DEBUG_INSN_IDX] = 1;
 188         }
 189       break;
 190
 191     case OPTION_DEBUG_FILE :
 192       if (! WITH_DEBUG)
 193         sim_io_eprintf (sd, "Debugging not compiled in, `--debug-file' ignored\n");
 194       else
 195         {
 196           FILE *f = fopen (arg, "w");
 197
 198           if (f == NULL)
 199             {
 200               sim_io_eprintf (sd, "Unable to open debug output file `%s'\n", arg);
 201               return SIM_RC_FAIL;
 202             }
 203           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 204             CPU_DEBUG_FILE (STATE_CPU (sd, n)) = f;
 205         }
 206       break;
 207
 208 #ifdef SIM_H8300 /* FIXME: Can be moved to h8300 dir.  */
 209     case 'h' :
 210       set_h8300h (1);
 211       break;
 212 #endif
 213
 214 #ifdef SIM_HAVE_FLATMEM
 215     case 'm':
 216       {
 217         unsigned long ul = strtol (arg, NULL, 0);
 218         /* 16384: some minimal amount */
 219         if (! isdigit (arg[0]) || ul < 16384)
 220           {
 221             sim_io_eprintf (sd, "Invalid memory size `%s'", arg);
 222             return SIM_RC_FAIL;
 223           }
 224         STATE_MEM_SIZE (sd) = ul;
 225       }
 226       break;
 227 #endif
 228
 229     case OPTION_DO_COMMAND:
 230       sim_do_command (sd, arg);
 231       break;
 232
 233     case 'H':
 234       sim_print_help (sd);
 235       if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 236         exit (0);
 237       /* FIXME: 'twould be nice to do something similar if gdb.  */
 238       break;
 239     }
 240
 241   return SIM_RC_OK;
 242 }
 243
 244 /* Add the standard option list to the simulator.  */
 245
 246 SIM_RC
 247 standard_install (SIM_DESC sd)
 248 {
 249   if (sim_add_option_table (sd, standard_options) != SIM_RC_OK)
 250     return SIM_RC_FAIL;
 251   return SIM_RC_OK;
 252 }
 253
 254 /* Return non-zero if arg is a duplicate argument.
 255    If ARG is NULL, initialize.  */
 256
 257 #define ARG_HASH_SIZE 97
 258 #define ARG_HASH(a) ((256 * (unsigned char) a[0] + (unsigned char) a[1]) % ARG_HASH_SIZE)
 259
 260 static int
 261 dup_arg_p (arg)
 262      char *arg;
 263 {
 264   int hash;
 265   static char **arg_table = NULL;
 266
 267   if (arg == NULL)
 268     {
 269       if (arg_table == NULL)
 270         arg_table = (char **) xmalloc (ARG_HASH_SIZE * sizeof (char *));
 271       memset (arg_table, 0, ARG_HASH_SIZE * sizeof (char *));
 272       return 0;
 273     }
 274
 275   hash = ARG_HASH (arg);
 276   while (arg_table[hash] != NULL)
 277     {
 278       if (strcmp (arg, arg_table[hash]) == 0)
 279         return 1;
 280       /* We assume there won't be more than ARG_HASH_SIZE arguments so we
 281          don't check if the table is full.  */
 282       if (++hash == ARG_HASH_SIZE)
 283         hash = 0;
 284     }
 285   arg_table[hash] = arg;
 286   return 0;
 287 }
 288
 289 /* Called by sim_open to parse the arguments.  */
 290
 291 SIM_RC
 292 sim_parse_args (sd, argv)
 293      SIM_DESC sd;
 294      char **argv;
 295 {
 296   int i, argc, num_opts;
 297   char *p, *short_options;
 298   /* The `val' option struct entry is dynamically assigned for options that
 299      only come in the long form.  ORIG_VAL is used to get the original value
 300      back.  */
 301   unsigned char *orig_val;
 302   struct option *lp, *long_options;
 303   const struct option_list *ol;
 304   const OPTION *opt;
 305   OPTION_HANDLER **handlers;
 306
 307   /* Count the number of arguments.  */
 308   for (argc = 0; argv[argc] != NULL; ++argc)
 309     continue;
 310
 311   /* Count the number of options.  */
 312   num_opts = 0;
 313   for (ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 314     for (opt = ol->options; opt->opt.name != NULL; ++opt)
 315       ++num_opts;
 316
 317   /* Initialize duplicate argument checker.  */
 318   (void) dup_arg_p (NULL);
 319
 320   /* Build the option table for getopt.  */
 321   long_options = (struct option *) alloca ((num_opts + 1) * sizeof (struct option));
 322   lp = long_options;
 323   short_options = (char *) alloca (num_opts * 3 + 1);
 324   p = short_options;
 325 #if 0 /* ??? necessary anymore? */
 326   /* Set '+' as first char so argument permutation isn't done.  This is done
 327      to workaround a problem with invoking getopt_long in run.c.: optind gets
 328      decremented when the program name is reached.  */
 329   *p++ = '+';
 330 #endif
 331   handlers = (OPTION_HANDLER **) alloca (256 * sizeof (OPTION_HANDLER *));
 332   memset (handlers, 0, 256 * sizeof (OPTION_HANDLER *));
 333   orig_val = (unsigned char *) alloca (256);
 334   for (i = OPTION_START, ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 335     for (opt = ol->options; opt->opt.name != NULL; ++opt)
 336       {
 337         if (dup_arg_p (opt->opt.name))
 338           continue;
 339         if (opt->shortopt != 0)
 340           {
 341             *p++ = opt->shortopt;
 342             if (opt->opt.has_arg == required_argument)
 343               *p++ = ':';
 344             else if (opt->opt.has_arg == optional_argument)
 345               { *p++ = ':'; *p++ = ':'; }
 346           }
 347         *lp = opt->opt;
 348         /* Dynamically assign `val' numbers for long options that don't have
 349            a short option equivalent.  */
 350         if (OPTION_LONG_ONLY_P (opt->opt.val))
 351           lp->val = i++;
 352         handlers[(unsigned char) lp->val] = opt->handler;
 353         orig_val[(unsigned char) lp->val] = opt->opt.val;
 354         ++lp;
 355       }
 356   *p = 0;
 357   lp->name = NULL;
 358
 359   /* Ensure getopt is initialized.  */
 360   optind = 0;
 361   while (1)
 362     {
 363       int longind, optc;
 364
 365       optc = getopt_long (argc, argv, short_options, long_options, &longind);
 366       if (optc == -1)
 367         {
 368           if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 369             STATE_PROG_ARGV (sd) = argv + optind;
 370           break;
 371         }
 372       if (optc == '?')
 373         return SIM_RC_FAIL;
 374
 375       if ((*handlers[optc]) (sd, orig_val[optc], optarg) == SIM_RC_FAIL)
 376         return SIM_RC_FAIL;
 377     }
 378
 379   return SIM_RC_OK;
 380 }
 381
 382 /* Print help messages for the options.  */
 383
 384 void
 385 sim_print_help (sd)
 386      SIM_DESC sd;
 387 {
 388   const struct option_list *ol;
 389   const OPTION *opt;
 390
 391   if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 392     sim_io_printf (sd, "Usage: %s [options] program [program args]\n",
 393                    STATE_MY_NAME (sd));
 394
 395   /* Initialize duplicate argument checker.  */
 396   (void) dup_arg_p (NULL);
 397
 398   sim_io_printf (sd, "Options:\n");
 399   for (ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 400     for (opt = ol->options; opt->opt.name != NULL; ++opt)
 401       {
 402         int comma, len;
 403         const OPTION *o;
 404
 405         if (dup_arg_p (opt->opt.name))
 406           continue;
 407
 408         if (opt->doc == NULL)
 409           continue;
 410
 411         sim_io_printf (sd, "  ");
 412
 413         comma = 0;
 414         len = 2;
 415
 416         o = opt;
 417         do
 418           {
 419             if (o->shortopt != '\0')
 420               {
 421                 sim_io_printf (sd, "%s-%c", comma ? ", " : "", o->shortopt);
 422                 len += (comma ? 2 : 0) + 2;
 423                 if (o->arg != NULL)
 424                   {
 425                     if (o->opt.has_arg == optional_argument)
 426                       {
 427                         sim_io_printf (sd, "[%s]", o->arg);
 428                         len += 1 + strlen (o->arg) + 1;
 429                       }
 430                     else
 431                       {
 432                         sim_io_printf (sd, " %s", o->arg);
 433                         len += 1 + strlen (o->arg);
 434                       }
 435                   }
 436                 comma = 1;
 437               }
 438             ++o;
 439           }
 440         while (o->opt.name != NULL && o->doc == NULL);
 441
 442         o = opt;
 443         do
 444           {
 445             if (o->opt.name != NULL)
 446               {
 447                 sim_io_printf (sd, "%s--%s",
 448                                comma ? ", " : "",
 449                                o->opt.name);
 450                 len += ((comma ? 2 : 0)
 451                         + 2
 452                         + strlen (o->opt.name));
 453                 if (o->arg != NULL)
 454                   {
 455                     if (o->opt.has_arg == optional_argument)
 456                       {
 457                         sim_io_printf (sd, " [%s]", o->arg);
 458                         len += 2 + strlen (o->arg) + 1;
 459                       }
 460                     else
 461                       {
 462                         sim_io_printf (sd, " %s", o->arg);
 463                         len += 1 + strlen (o->arg);
 464                       }
 465                   }
 466                 comma = 1;
 467               }
 468             ++o;
 469           }
 470         while (o->opt.name != NULL && o->doc == NULL);
 471
 472         if (len >= 30)
 473           {
 474             sim_io_printf (sd, "\n");
 475             len = 0;
 476           }
 477
 478         for (; len < 30; len++)
 479           sim_io_printf (sd, " ");
 480
 481         sim_io_printf (sd, "%s\n", opt->doc);
 482       }
 483
 484   if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 485     {
 486       sim_io_printf (sd, "\n");
 487       sim_io_printf (sd, "program args    Arguments to pass to simulated program.\n");
 488       sim_io_printf (sd, "                Note: Very few simulators support this.\n");
 489     }
 490 }
 491
 492
 493
 494
 495 SIM_RC
 496 sim_args_command (sd, cmd)
 497      SIM_DESC sd;
 498      char *cmd;
 499 {
 500   /* something to do? */
 501   if (cmd == NULL)
 502     return SIM_RC_OK; /* FIXME - perhaphs help would be better */
 503
 504   if (cmd [0] == '-')
 505     {
 506       /* user specified -<opt> ... form? */
 507       char **argv = buildargv (cmd);
 508       SIM_RC rc = sim_parse_args (sd, argv);
 509       freeargv (argv);
 510       return rc;
 511     }
 512   else
 513     {
 514       /* user specified <opt> form? */
 515       const struct option_list *ol;
 516       const OPTION *opt;
 517       char **argv = buildargv (cmd);
 518       for (ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 519         for (opt = ol->options; opt->opt.name != NULL; ++opt)
 520           {
 521             if (strcmp (argv[0], opt->opt.name) == 0)
 522               {
 523                 switch (opt->opt.has_arg)
 524                   {
 525                   case no_argument:
 526                     if (argv[1] == NULL)
 527                       opt->handler (sd, opt->opt.val, NULL);
 528                     else
 529                       sim_io_eprintf (sd, "Command `%s' takes no arguments\n", opt->opt.name);
 530                     break;
 531                   case optional_argument:
 532                     if (argv[1] == NULL)
 533                       opt->handler (sd, opt->opt.val, NULL);
 534                     else if (argv[2] == NULL)
 535                       opt->handler (sd, opt->opt.val, argv[1]);
 536                     else
 537                       sim_io_eprintf (sd, "Command `%s' requires no more than one argument\n", opt->opt.name);
 538                     break;
 539                   case required_argument:
 540                     if (argv[1] == NULL)
 541                       sim_io_eprintf (sd, "Command `%s' requires an argument\n", opt->opt.name);
 542                     else if (argv[2] == NULL)
 543                       opt->handler (sd, opt->opt.val, argv[1]);
 544                     else
 545                       sim_io_eprintf (sd, "Command `%s' requires only one argument\n", opt->opt.name);
 546                   }
 547                 return SIM_RC_OK;
 548               }
 549           }
 550     }
 551
 552   /* didn't find anything that matched */
 553   return SIM_RC_FAIL;
 554 }