sim/common/sim-options.c

   1 /* Simulator option handling.
   2    Copyright (C) 1996, 1997, 2004 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 #ifdef HAVE_STDLIB_H
  30 #include <stdlib.h>
  31 #endif
  32 #include <ctype.h>
  33 #include "libiberty.h"
  34 #include "sim-options.h"
  35 #include "sim-io.h"
  36 #include "sim-assert.h"
  37
  38 #include "bfd.h"
  39
  40 /* Add a set of options to the simulator.
  41    TABLE is an array of OPTIONS terminated by a NULL `opt.name' entry.
  42    This is intended to be called by modules in their `install' handler.  */
  43
  44 SIM_RC
  45 sim_add_option_table (SIM_DESC sd, sim_cpu *cpu, const OPTION *table)
  46 {
  47   struct option_list *ol = ((struct option_list *)
  48                             xmalloc (sizeof (struct option_list)));
  49
  50   /* Note: The list is constructed in the reverse order we're called so
  51      later calls will override earlier ones (in case that ever happens).
  52      This is the intended behaviour.  */
  53
  54   if (cpu)
  55     {
  56       ol->next = CPU_OPTIONS (cpu);
  57       ol->options = table;
  58       CPU_OPTIONS (cpu) = ol;
  59     }
  60   else
  61     {
  62       ol->next = STATE_OPTIONS (sd);
  63       ol->options = table;
  64       STATE_OPTIONS (sd) = ol;
  65     }
  66
  67   return SIM_RC_OK;
  68 }
  69
  70 /* Standard option table.
  71    Modules may specify additional ones.
  72    The caller of sim_parse_args may also specify additional options
  73    by calling sim_add_option_table first.  */
  74
  75 static DECLARE_OPTION_HANDLER (standard_option_handler);
  76
  77 /* FIXME: We shouldn't print in --help output options that aren't usable.
  78    Some fine tuning will be necessary.  One can either move less general
  79    options to another table or use a HAVE_FOO macro to ifdef out unavailable
  80    options.  */
  81
  82 /* ??? One might want to conditionally compile out the entries that
  83    aren't enabled.  There's a distinction, however, between options a
  84    simulator can't support and options that haven't been configured in.
  85    Certainly options a simulator can't support shouldn't appear in the
  86    output of --help.  Whether the same thing applies to options that haven't
  87    been configured in or not isn't something I can get worked up over.
  88    [Note that conditionally compiling them out might simply involve moving
  89    the option to another table.]
  90    If you decide to conditionally compile them out as well, delete this
  91    comment and add a comment saying that that is the rule.  */
  92
  93 typedef enum {
  94   OPTION_DEBUG_INSN = OPTION_START,
  95   OPTION_DEBUG_FILE,
  96   OPTION_DO_COMMAND,
  97   OPTION_ARCHITECTURE,
  98   OPTION_TARGET,
  99   OPTION_ARCHITECTURE_INFO,
 100   OPTION_ENVIRONMENT,
 101   OPTION_ALIGNMENT,
 102   OPTION_VERBOSE,
 103 #if defined (SIM_HAVE_BIENDIAN)
 104   OPTION_ENDIAN,
 105 #endif
 106   OPTION_DEBUG,
 107 #ifdef SIM_HAVE_FLATMEM
 108   OPTION_MEM_SIZE,
 109 #endif
 110   OPTION_HELP,
 111 #ifdef SIM_H8300 /* FIXME: Should be movable to h8300 dir.  */
 112   OPTION_H8300H,
 113   OPTION_H8300S,
 114   OPTION_H8300SX,
 115 #endif
 116   OPTION_LOAD_LMA,
 117   OPTION_LOAD_VMA,
 118   OPTION_SYSROOT
 119 } STANDARD_OPTIONS;
 120
 121 static const OPTION standard_options[] =
 122 {
 123   { {"verbose", no_argument, NULL, OPTION_VERBOSE},
 124       'v', NULL, "Verbose output",
 125       standard_option_handler },
 126
 127 #if defined (SIM_HAVE_BIENDIAN) /* ??? && WITH_TARGET_BYTE_ORDER == 0 */
 128   { {"endian", required_argument, NULL, OPTION_ENDIAN},
 129       'E', "big|little", "Set endianness",
 130       standard_option_handler },
 131 #endif
 132
 133 #ifdef SIM_HAVE_ENVIRONMENT
 134   /* This option isn't supported unless all choices are supported in keeping
 135      with the goal of not printing in --help output things the simulator can't
 136      do [as opposed to things that just haven't been configured in].  */
 137   { {"environment", required_argument, NULL, OPTION_ENVIRONMENT},
 138       '\0', "user|virtual|operating", "Set running environment",
 139       standard_option_handler },
 140 #endif
 141
 142   { {"alignment", required_argument, NULL, OPTION_ALIGNMENT},
 143       '\0', "strict|nonstrict|forced", "Set memory access alignment",
 144       standard_option_handler },
 145
 146   { {"debug", no_argument, NULL, OPTION_DEBUG},
 147       'D', NULL, "Print debugging messages",
 148       standard_option_handler },
 149   { {"debug-insn", no_argument, NULL, OPTION_DEBUG_INSN},
 150       '\0', NULL, "Print instruction debugging messages",
 151       standard_option_handler },
 152   { {"debug-file", required_argument, NULL, OPTION_DEBUG_FILE},
 153       '\0', "FILE NAME", "Specify debugging output file",
 154       standard_option_handler },
 155
 156 #ifdef SIM_H8300 /* FIXME: Should be movable to h8300 dir.  */
 157   { {"h8300h", no_argument, NULL, OPTION_H8300H},
 158       'h', NULL, "Indicate the CPU is H8/300H",
 159       standard_option_handler },
 160   { {"h8300s", no_argument, NULL, OPTION_H8300S},
 161       'S', NULL, "Indicate the CPU is H8S",
 162       standard_option_handler },
 163   { {"h8300sx", no_argument, NULL, OPTION_H8300SX},
 164       'x', NULL, "Indicate the CPU is H8SX",
 165       standard_option_handler },
 166 #endif
 167
 168 #ifdef SIM_HAVE_FLATMEM
 169   { {"mem-size", required_argument, NULL, OPTION_MEM_SIZE},
 170       'm', "MEMORY SIZE", "Specify memory size",
 171       standard_option_handler },
 172 #endif
 173
 174   { {"do-command", required_argument, NULL, OPTION_DO_COMMAND},
 175       '\0', "COMMAND", ""/*undocumented*/,
 176       standard_option_handler },
 177
 178   { {"help", no_argument, NULL, OPTION_HELP},
 179       'H', NULL, "Print help information",
 180       standard_option_handler },
 181
 182   { {"architecture", required_argument, NULL, OPTION_ARCHITECTURE},
 183       '\0', "MACHINE", "Specify the architecture to use",
 184       standard_option_handler },
 185   { {"architecture-info", no_argument, NULL, OPTION_ARCHITECTURE_INFO},
 186       '\0', NULL, "List supported architectures",
 187       standard_option_handler },
 188   { {"info-architecture", no_argument, NULL, OPTION_ARCHITECTURE_INFO},
 189       '\0', NULL, NULL,
 190       standard_option_handler },
 191
 192   { {"target", required_argument, NULL, OPTION_TARGET},
 193       '\0', "BFDNAME", "Specify the object-code format for the object files",
 194       standard_option_handler },
 195
 196 #ifdef SIM_HANDLES_LMA
 197   { {"load-lma", no_argument, NULL, OPTION_LOAD_LMA},
 198       '\0', NULL,
 199 #if SIM_HANDLES_LMA
 200     "Use VMA or LMA addresses when loading image (default LMA)",
 201 #else
 202     "Use VMA or LMA addresses when loading image (default VMA)",
 203 #endif
 204       standard_option_handler, "load-{lma,vma}" },
 205   { {"load-vma", no_argument, NULL, OPTION_LOAD_VMA},
 206       '\0', NULL, "", standard_option_handler,  "" },
 207 #endif
 208
 209   { {"sysroot", required_argument, NULL, OPTION_SYSROOT},
 210       '\0', "SYSROOT",
 211     "Root for system calls with absolute file-names and cwd at start",
 212       standard_option_handler },
 213
 214   { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
 215 };
 216
 217 static SIM_RC
 218 standard_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
 219                          char *arg, int is_command)
 220 {
 221   int i,n;
 222
 223   switch ((STANDARD_OPTIONS) opt)
 224     {
 225     case OPTION_VERBOSE:
 226       STATE_VERBOSE_P (sd) = 1;
 227       break;
 228
 229 #ifdef SIM_HAVE_BIENDIAN
 230     case OPTION_ENDIAN:
 231       if (strcmp (arg, "big") == 0)
 232         {
 233           if (WITH_TARGET_BYTE_ORDER == LITTLE_ENDIAN)
 234             {
 235               sim_io_eprintf (sd, "Simulator compiled for little endian only.\n");
 236               return SIM_RC_FAIL;
 237             }
 238           /* FIXME:wip: Need to set something in STATE_CONFIG.  */
 239           current_target_byte_order = BIG_ENDIAN;
 240         }
 241       else if (strcmp (arg, "little") == 0)
 242         {
 243           if (WITH_TARGET_BYTE_ORDER == BIG_ENDIAN)
 244             {
 245               sim_io_eprintf (sd, "Simulator compiled for big endian only.\n");
 246               return SIM_RC_FAIL;
 247             }
 248           /* FIXME:wip: Need to set something in STATE_CONFIG.  */
 249           current_target_byte_order = LITTLE_ENDIAN;
 250         }
 251       else
 252         {
 253           sim_io_eprintf (sd, "Invalid endian specification `%s'\n", arg);
 254           return SIM_RC_FAIL;
 255         }
 256       break;
 257 #endif
 258
 259     case OPTION_ENVIRONMENT:
 260       if (strcmp (arg, "user") == 0)
 261         STATE_ENVIRONMENT (sd) = USER_ENVIRONMENT;
 262       else if (strcmp (arg, "virtual") == 0)
 263         STATE_ENVIRONMENT (sd) = VIRTUAL_ENVIRONMENT;
 264       else if (strcmp (arg, "operating") == 0)
 265         STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT;
 266       else
 267         {
 268           sim_io_eprintf (sd, "Invalid environment specification `%s'\n", arg);
 269           return SIM_RC_FAIL;
 270         }
 271       if (WITH_ENVIRONMENT != ALL_ENVIRONMENT
 272           && WITH_ENVIRONMENT != STATE_ENVIRONMENT (sd))
 273         {
 274           char *type;
 275           switch (WITH_ENVIRONMENT)
 276             {
 277             case USER_ENVIRONMENT: type = "user"; break;
 278             case VIRTUAL_ENVIRONMENT: type = "virtual"; break;
 279             case OPERATING_ENVIRONMENT: type = "operating"; break;
 280             }
 281           sim_io_eprintf (sd, "Simulator compiled for the %s environment only.\n",
 282                           type);
 283           return SIM_RC_FAIL;
 284         }
 285       break;
 286
 287     case OPTION_ALIGNMENT:
 288       if (strcmp (arg, "strict") == 0)
 289         {
 290           if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == STRICT_ALIGNMENT)
 291             {
 292               current_alignment = STRICT_ALIGNMENT;
 293               break;
 294             }
 295         }
 296       else if (strcmp (arg, "nonstrict") == 0)
 297         {
 298           if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == NONSTRICT_ALIGNMENT)
 299             {
 300               current_alignment = NONSTRICT_ALIGNMENT;
 301               break;
 302             }
 303         }
 304       else if (strcmp (arg, "forced") == 0)
 305         {
 306           if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == FORCED_ALIGNMENT)
 307             {
 308               current_alignment = FORCED_ALIGNMENT;
 309               break;
 310             }
 311         }
 312       else
 313         {
 314           sim_io_eprintf (sd, "Invalid alignment specification `%s'\n", arg);
 315           return SIM_RC_FAIL;
 316         }
 317       switch (WITH_ALIGNMENT)
 318         {
 319         case STRICT_ALIGNMENT:
 320           sim_io_eprintf (sd, "Simulator compiled for strict alignment only.\n");
 321           break;
 322         case NONSTRICT_ALIGNMENT:
 323           sim_io_eprintf (sd, "Simulator compiled for nonstrict alignment only.\n");
 324           break;
 325         case FORCED_ALIGNMENT:
 326           sim_io_eprintf (sd, "Simulator compiled for forced alignment only.\n");
 327           break;
 328         }
 329       return SIM_RC_FAIL;
 330
 331     case OPTION_DEBUG:
 332       if (! WITH_DEBUG)
 333         sim_io_eprintf (sd, "Debugging not compiled in, `-D' ignored\n");
 334       else
 335         {
 336           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 337             for (i = 0; i < MAX_DEBUG_VALUES; ++i)
 338               CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[i] = 1;
 339         }
 340       break;
 341
 342     case OPTION_DEBUG_INSN :
 343       if (! WITH_DEBUG)
 344         sim_io_eprintf (sd, "Debugging not compiled in, `--debug-insn' ignored\n");
 345       else
 346         {
 347           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 348             CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[DEBUG_INSN_IDX] = 1;
 349         }
 350       break;
 351
 352     case OPTION_DEBUG_FILE :
 353       if (! WITH_DEBUG)
 354         sim_io_eprintf (sd, "Debugging not compiled in, `--debug-file' ignored\n");
 355       else
 356         {
 357           FILE *f = fopen (arg, "w");
 358
 359           if (f == NULL)
 360             {
 361               sim_io_eprintf (sd, "Unable to open debug output file `%s'\n", arg);
 362               return SIM_RC_FAIL;
 363             }
 364           for (n = 0; n < MAX_NR_PROCESSORS; ++n)
 365             CPU_DEBUG_FILE (STATE_CPU (sd, n)) = f;
 366         }
 367       break;
 368
 369 #ifdef SIM_H8300 /* FIXME: Can be moved to h8300 dir.  */
 370     case OPTION_H8300H:
 371       set_h8300h (bfd_mach_h8300h);
 372       break;
 373     case OPTION_H8300S:
 374       set_h8300h (bfd_mach_h8300s);
 375       break;
 376     case OPTION_H8300SX:
 377       set_h8300h (bfd_mach_h8300sx);
 378       break;
 379 #endif
 380
 381 #ifdef SIM_HAVE_FLATMEM
 382     case OPTION_MEM_SIZE:
 383       {
 384         unsigned long ul = strtol (arg, NULL, 0);
 385         /* 16384: some minimal amount */
 386         if (! isdigit (arg[0]) || ul < 16384)
 387           {
 388             sim_io_eprintf (sd, "Invalid memory size `%s'", arg);
 389             return SIM_RC_FAIL;
 390           }
 391         STATE_MEM_SIZE (sd) = ul;
 392       }
 393       break;
 394 #endif
 395
 396     case OPTION_DO_COMMAND:
 397       sim_do_command (sd, arg);
 398       break;
 399
 400     case OPTION_ARCHITECTURE:
 401       {
 402         const struct bfd_arch_info *ap = bfd_scan_arch (arg);
 403         if (ap == NULL)
 404           {
 405             sim_io_eprintf (sd, "Architecture `%s' unknown\n", arg);
 406             return SIM_RC_FAIL;
 407           }
 408         STATE_ARCHITECTURE (sd) = ap;
 409         break;
 410       }
 411
 412     case OPTION_ARCHITECTURE_INFO:
 413       {
 414         const char **list = bfd_arch_list();
 415         const char **lp;
 416         if (list == NULL)
 417           abort ();
 418         sim_io_printf (sd, "Possible architectures:");
 419         for (lp = list; *lp != NULL; lp++)
 420           sim_io_printf (sd, " %s", *lp);
 421         sim_io_printf (sd, "\n");
 422         free (list);
 423         break;
 424       }
 425
 426     case OPTION_TARGET:
 427       {
 428         STATE_TARGET (sd) = xstrdup (arg);
 429         break;
 430       }
 431
 432     case OPTION_LOAD_LMA:
 433       {
 434         STATE_LOAD_AT_LMA_P (sd) = 1;
 435         break;
 436       }
 437
 438     case OPTION_LOAD_VMA:
 439       {
 440         STATE_LOAD_AT_LMA_P (sd) = 0;
 441         break;
 442       }
 443
 444     case OPTION_HELP:
 445       sim_print_help (sd, is_command);
 446       if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 447         exit (0);
 448       /* FIXME: 'twould be nice to do something similar if gdb.  */
 449       break;
 450
 451     case OPTION_SYSROOT:
 452       /* Don't leak memory in the odd event that there's lots of
 453          --sysroot=... options.  */
 454       if (simulator_sysroot[0] != '\0' && arg[0] != '\0')
 455         free (simulator_sysroot);
 456       simulator_sysroot = xstrdup (arg);
 457       break;
 458     }
 459
 460   return SIM_RC_OK;
 461 }
 462
 463 /* Add the standard option list to the simulator.  */
 464
 465 SIM_RC
 466 standard_install (SIM_DESC sd)
 467 {
 468   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 469   if (sim_add_option_table (sd, NULL, standard_options) != SIM_RC_OK)
 470     return SIM_RC_FAIL;
 471 #ifdef SIM_HANDLES_LMA
 472   STATE_LOAD_AT_LMA_P (sd) = SIM_HANDLES_LMA;
 473 #endif
 474   return SIM_RC_OK;
 475 }
 476
 477 /* Return non-zero if arg is a duplicate argument.
 478    If ARG is NULL, initialize.  */
 479
 480 #define ARG_HASH_SIZE 97
 481 #define ARG_HASH(a) ((256 * (unsigned char) a[0] + (unsigned char) a[1]) % ARG_HASH_SIZE)
 482
 483 static int
 484 dup_arg_p (arg)
 485      char *arg;
 486 {
 487   int hash;
 488   static char **arg_table = NULL;
 489
 490   if (arg == NULL)
 491     {
 492       if (arg_table == NULL)
 493         arg_table = (char **) xmalloc (ARG_HASH_SIZE * sizeof (char *));
 494       memset (arg_table, 0, ARG_HASH_SIZE * sizeof (char *));
 495       return 0;
 496     }
 497
 498   hash = ARG_HASH (arg);
 499   while (arg_table[hash] != NULL)
 500     {
 501       if (strcmp (arg, arg_table[hash]) == 0)
 502         return 1;
 503       /* We assume there won't be more than ARG_HASH_SIZE arguments so we
 504          don't check if the table is full.  */
 505       if (++hash == ARG_HASH_SIZE)
 506         hash = 0;
 507     }
 508   arg_table[hash] = arg;
 509   return 0;
 510 }
 511
 512 /* Called by sim_open to parse the arguments.  */
 513
 514 SIM_RC
 515 sim_parse_args (sd, argv)
 516      SIM_DESC sd;
 517      char **argv;
 518 {
 519   int c, i, argc, num_opts;
 520   char *p, *short_options;
 521   /* The `val' option struct entry is dynamically assigned for options that
 522      only come in the long form.  ORIG_VAL is used to get the original value
 523      back.  */
 524   int *orig_val;
 525   struct option *lp, *long_options;
 526   const struct option_list *ol;
 527   const OPTION *opt;
 528   OPTION_HANDLER **handlers;
 529   sim_cpu **opt_cpu;
 530   SIM_RC result = SIM_RC_OK;
 531
 532   /* Count the number of arguments.  */
 533   for (argc = 0; argv[argc] != NULL; ++argc)
 534     continue;
 535
 536   /* Count the number of options.  */
 537   num_opts = 0;
 538   for (ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 539     for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 540       ++num_opts;
 541   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 542     for (ol = CPU_OPTIONS (STATE_CPU (sd, i)); ol != NULL; ol = ol->next)
 543       for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 544         ++num_opts;
 545
 546   /* Initialize duplicate argument checker.  */
 547   (void) dup_arg_p (NULL);
 548
 549   /* Build the option table for getopt.  */
 550
 551   long_options = NZALLOC (struct option, num_opts + 1);
 552   lp = long_options;
 553   short_options = NZALLOC (char, num_opts * 3 + 1);
 554   p = short_options;
 555   handlers = NZALLOC (OPTION_HANDLER *, OPTION_START + num_opts);
 556   orig_val = NZALLOC (int, OPTION_START + num_opts);
 557   opt_cpu = NZALLOC (sim_cpu *, OPTION_START + num_opts);
 558
 559   /* Set '+' as first char so argument permutation isn't done.  This
 560      is done to stop getopt_long returning options that appear after
 561      the target program.  Such options should be passed unchanged into
 562      the program image. */
 563   *p++ = '+';
 564
 565   for (i = OPTION_START, ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next)
 566     for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 567       {
 568         if (dup_arg_p (opt->opt.name))
 569           continue;
 570         if (opt->shortopt != 0)
 571           {
 572             *p++ = opt->shortopt;
 573             if (opt->opt.has_arg == required_argument)
 574               *p++ = ':';
 575             else if (opt->opt.has_arg == optional_argument)
 576               { *p++ = ':'; *p++ = ':'; }
 577             handlers[(unsigned char) opt->shortopt] = opt->handler;
 578             if (opt->opt.val != 0)
 579               orig_val[(unsigned char) opt->shortopt] = opt->opt.val;
 580             else
 581               orig_val[(unsigned char) opt->shortopt] = opt->shortopt;
 582           }
 583         if (opt->opt.name != NULL)
 584           {
 585             *lp = opt->opt;
 586             /* Dynamically assign `val' numbers for long options. */
 587             lp->val = i++;
 588             handlers[lp->val] = opt->handler;
 589             orig_val[lp->val] = opt->opt.val;
 590             opt_cpu[lp->val] = NULL;
 591             ++lp;
 592           }
 593       }
 594
 595   for (c = 0; c < MAX_NR_PROCESSORS; ++c)
 596     {
 597       sim_cpu *cpu = STATE_CPU (sd, c);
 598       for (ol = CPU_OPTIONS (cpu); ol != NULL; ol = ol->next)
 599         for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 600           {
 601 #if 0 /* Each option is prepended with --<cpuname>- so this greatly cuts down
 602          on the need for dup_arg_p checking.  Maybe in the future it'll be
 603          needed so this is just commented out, and not deleted.  */
 604             if (dup_arg_p (opt->opt.name))
 605               continue;
 606 #endif
 607             /* Don't allow short versions of cpu specific options for now.  */
 608             if (opt->shortopt != 0)
 609               {
 610                 sim_io_eprintf (sd, "internal error, short cpu specific option");
 611                 result = SIM_RC_FAIL;
 612                 break;
 613               }
 614             if (opt->opt.name != NULL)
 615               {
 616                 char *name;
 617                 *lp = opt->opt;
 618                 /* Prepend --<cpuname>- to the option.  */
 619                 asprintf (&name, "%s-%s", CPU_NAME (cpu), lp->name);
 620                 lp->name = name;
 621                 /* Dynamically assign `val' numbers for long options. */
 622                 lp->val = i++;
 623                 handlers[lp->val] = opt->handler;
 624                 orig_val[lp->val] = opt->opt.val;
 625                 opt_cpu[lp->val] = cpu;
 626                 ++lp;
 627               }
 628           }
 629     }
 630
 631   /* Terminate the short and long option lists.  */
 632   *p = 0;
 633   lp->name = NULL;
 634
 635   /* Ensure getopt is initialized.  */
 636   optind = 0;
 637
 638   while (1)
 639     {
 640       int longind, optc;
 641
 642       optc = getopt_long (argc, argv, short_options, long_options, &longind);
 643       if (optc == -1)
 644         {
 645           if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 646             STATE_PROG_ARGV (sd) = dupargv (argv + optind);
 647           break;
 648         }
 649       if (optc == '?')
 650         {
 651           result = SIM_RC_FAIL;
 652           break;
 653         }
 654
 655       if ((*handlers[optc]) (sd, opt_cpu[optc], orig_val[optc], optarg, 0/*!is_command*/) == SIM_RC_FAIL)
 656         {
 657           result = SIM_RC_FAIL;
 658           break;
 659         }
 660     }
 661
 662   zfree (long_options);
 663   zfree (short_options);
 664   zfree (handlers);
 665   zfree (opt_cpu);
 666   zfree (orig_val);
 667   return result;
 668 }
 669
 670 /* Utility of sim_print_help to print a list of option tables.  */
 671
 672 static void
 673 print_help (SIM_DESC sd, sim_cpu *cpu, const struct option_list *ol, int is_command)
 674 {
 675   const OPTION *opt;
 676
 677   for ( ; ol != NULL; ol = ol->next)
 678     for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 679       {
 680         const int indent = 30;
 681         int comma, len;
 682         const OPTION *o;
 683
 684         if (dup_arg_p (opt->opt.name))
 685           continue;
 686
 687         if (opt->doc == NULL)
 688           continue;
 689
 690         if (opt->doc_name != NULL && opt->doc_name [0] == '\0')
 691           continue;
 692
 693         sim_io_printf (sd, "  ");
 694
 695         comma = 0;
 696         len = 2;
 697
 698         /* list any short options (aliases) for the current OPT */
 699         if (!is_command)
 700           {
 701             o = opt;
 702             do
 703               {
 704                 if (o->shortopt != '\0')
 705                   {
 706                     sim_io_printf (sd, "%s-%c", comma ? ", " : "", o->shortopt);
 707                     len += (comma ? 2 : 0) + 2;
 708                     if (o->arg != NULL)
 709                       {
 710                         if (o->opt.has_arg == optional_argument)
 711                           {
 712                             sim_io_printf (sd, "[%s]", o->arg);
 713                             len += 1 + strlen (o->arg) + 1;
 714                           }
 715                         else
 716                           {
 717                             sim_io_printf (sd, " %s", o->arg);
 718                             len += 1 + strlen (o->arg);
 719                           }
 720                       }
 721                     comma = 1;
 722                   }
 723                 ++o;
 724               }
 725             while (OPTION_VALID_P (o) && o->doc == NULL);
 726           }
 727
 728         /* list any long options (aliases) for the current OPT */
 729         o = opt;
 730         do
 731           {
 732             const char *name;
 733             const char *cpu_prefix = cpu ? CPU_NAME (cpu) : NULL;
 734             if (o->doc_name != NULL)
 735               name = o->doc_name;
 736             else
 737               name = o->opt.name;
 738             if (name != NULL)
 739               {
 740                 sim_io_printf (sd, "%s%s%s%s%s",
 741                                comma ? ", " : "",
 742                                is_command ? "" : "--",
 743                                cpu ? cpu_prefix : "",
 744                                cpu ? "-" : "",
 745                                name);
 746                 len += ((comma ? 2 : 0)
 747                         + (is_command ? 0 : 2)
 748                         + strlen (name));
 749                 if (o->arg != NULL)
 750                   {
 751                     if (o->opt.has_arg == optional_argument)
 752                       {
 753                         sim_io_printf (sd, "[=%s]", o->arg);
 754                         len += 2 + strlen (o->arg) + 1;
 755                       }
 756                     else
 757                       {
 758                         sim_io_printf (sd, " %s", o->arg);
 759                         len += 1 + strlen (o->arg);
 760                       }
 761                   }
 762                 comma = 1;
 763               }
 764             ++o;
 765           }
 766         while (OPTION_VALID_P (o) && o->doc == NULL);
 767
 768         if (len >= indent)
 769           {
 770             sim_io_printf (sd, "\n%*s", indent, "");
 771           }
 772         else
 773           sim_io_printf (sd, "%*s", indent - len, "");
 774
 775         /* print the description, word wrap long lines */
 776         {
 777           const char *chp = opt->doc;
 778           unsigned doc_width = 80 - indent;
 779           while (strlen (chp) >= doc_width) /* some slack */
 780             {
 781               const char *end = chp + doc_width - 1;
 782               while (end > chp && !isspace (*end))
 783                 end --;
 784               if (end == chp)
 785                 end = chp + doc_width - 1;
 786               /* The cast should be ok - its distances between to
 787                  points in a string.  */
 788               sim_io_printf (sd, "%.*s\n%*s", (int) (end - chp), chp, indent,
 789                              "");
 790               chp = end;
 791               while (isspace (*chp) && *chp != '\0')
 792                 chp++;
 793             }
 794           sim_io_printf (sd, "%s\n", chp);
 795         }
 796       }
 797 }
 798
 799 /* Print help messages for the options.  */
 800
 801 void
 802 sim_print_help (sd, is_command)
 803      SIM_DESC sd;
 804      int is_command;
 805 {
 806   if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 807     sim_io_printf (sd, "Usage: %s [options] program [program args]\n",
 808                    STATE_MY_NAME (sd));
 809
 810   /* Initialize duplicate argument checker.  */
 811   (void) dup_arg_p (NULL);
 812
 813   if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 814     sim_io_printf (sd, "Options:\n");
 815   else
 816     sim_io_printf (sd, "Commands:\n");
 817
 818   print_help (sd, NULL, STATE_OPTIONS (sd), is_command);
 819   sim_io_printf (sd, "\n");
 820
 821   /* Print cpu-specific options.  */
 822   {
 823     int i;
 824
 825     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 826       {
 827         sim_cpu *cpu = STATE_CPU (sd, i);
 828         if (CPU_OPTIONS (cpu) == NULL)
 829           continue;
 830         sim_io_printf (sd, "CPU %s specific options:\n", CPU_NAME (cpu));
 831         print_help (sd, cpu, CPU_OPTIONS (cpu), is_command);
 832         sim_io_printf (sd, "\n");
 833       }
 834   }
 835
 836   sim_io_printf (sd, "Note: Depending on the simulator configuration some %ss\n",
 837                  STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE ? "option" : "command");
 838   sim_io_printf (sd, "      may not be applicable\n");
 839
 840   if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE)
 841     {
 842       sim_io_printf (sd, "\n");
 843       sim_io_printf (sd, "program args    Arguments to pass to simulated program.\n");
 844       sim_io_printf (sd, "                Note: Very few simulators support this.\n");
 845     }
 846 }
 847
 848 /* Utility of sim_args_command to find the closest match for a command.
 849    Commands that have "-" in them can be specified as separate words.
 850    e.g. sim memory-region 0x800000,0x4000
 851    or   sim memory region 0x800000,0x4000
 852    If CPU is non-null, use its option table list, otherwise use the main one.
 853    *PARGI is where to start looking in ARGV.  It is updated to point past
 854    the found option.  */
 855
 856 static const OPTION *
 857 find_match (SIM_DESC sd, sim_cpu *cpu, char *argv[], int *pargi)
 858 {
 859   const struct option_list *ol;
 860   const OPTION *opt;
 861   /* most recent option match */
 862   const OPTION *matching_opt = NULL;
 863   int matching_argi = -1;
 864
 865   if (cpu)
 866     ol = CPU_OPTIONS (cpu);
 867   else
 868     ol = STATE_OPTIONS (sd);
 869
 870   /* Skip passed elements specified by *PARGI.  */
 871   argv += *pargi;
 872
 873   for ( ; ol != NULL; ol = ol->next)
 874     for (opt = ol->options; OPTION_VALID_P (opt); ++opt)
 875       {
 876         int argi = 0;
 877         const char *name = opt->opt.name;
 878         if (name == NULL)
 879           continue;
 880         while (argv [argi] != NULL
 881                && strncmp (name, argv [argi], strlen (argv [argi])) == 0)
 882           {
 883             name = &name [strlen (argv[argi])];
 884             if (name [0] == '-')
 885               {
 886                 /* leading match ...<a-b-c>-d-e-f - continue search */
 887                 name ++; /* skip `-' */
 888                 argi ++;
 889                 continue;
 890               }
 891             else if (name [0] == '\0')
 892               {
 893                 /* exact match ...<a-b-c-d-e-f> - better than before? */
 894                 if (argi > matching_argi)
 895                   {
 896                     matching_argi = argi;
 897                     matching_opt = opt;
 898                   }
 899                 break;
 900               }
 901             else
 902               break;
 903           }
 904       }
 905
 906   *pargi = matching_argi;
 907   return matching_opt;
 908 }
 909
 910 SIM_RC
 911 sim_args_command (SIM_DESC sd, char *cmd)
 912 {
 913   /* something to do? */
 914   if (cmd == NULL)
 915     return SIM_RC_OK; /* FIXME - perhaps help would be better */
 916
 917   if (cmd [0] == '-')
 918     {
 919       /* user specified -<opt> ... form? */
 920       char **argv = buildargv (cmd);
 921       SIM_RC rc = sim_parse_args (sd, argv);
 922       freeargv (argv);
 923       return rc;
 924     }
 925   else
 926     {
 927       char **argv = buildargv (cmd);
 928       const OPTION *matching_opt = NULL;
 929       int matching_argi;
 930       sim_cpu *cpu;
 931
 932       if (argv [0] == NULL)
 933         return SIM_RC_OK; /* FIXME - perhaps help would be better */
 934
 935       /* First check for a cpu selector.  */
 936       {
 937         char *cpu_name = xstrdup (argv[0]);
 938         char *hyphen = strchr (cpu_name, '-');
 939         if (hyphen)
 940           *hyphen = 0;
 941         cpu = sim_cpu_lookup (sd, cpu_name);
 942         if (cpu)
 943           {
 944             /* If <cpuname>-<command>, point argv[0] at <command>.  */
 945             if (hyphen)
 946               {
 947                 matching_argi = 0;
 948                 argv[0] += hyphen - cpu_name + 1;
 949               }
 950             else
 951               matching_argi = 1;
 952             matching_opt = find_match (sd, cpu, argv, &matching_argi);
 953             /* If hyphen found restore argv[0].  */
 954             if (hyphen)
 955               argv[0] -= hyphen - cpu_name + 1;
 956           }
 957         free (cpu_name);
 958       }
 959
 960       /* If that failed, try the main table.  */
 961       if (matching_opt == NULL)
 962         {
 963           matching_argi = 0;
 964           matching_opt = find_match (sd, NULL, argv, &matching_argi);
 965         }
 966
 967       if (matching_opt != NULL)
 968         {
 969           switch (matching_opt->opt.has_arg)
 970             {
 971             case no_argument:
 972               if (argv [matching_argi + 1] == NULL)
 973                 matching_opt->handler (sd, cpu, matching_opt->opt.val,
 974                                        NULL, 1/*is_command*/);
 975               else
 976                 sim_io_eprintf (sd, "Command `%s' takes no arguments\n",
 977                                 matching_opt->opt.name);
 978               break;
 979             case optional_argument:
 980               if (argv [matching_argi + 1] == NULL)
 981                 matching_opt->handler (sd, cpu, matching_opt->opt.val,
 982                                        NULL, 1/*is_command*/);
 983               else if (argv [matching_argi + 2] == NULL)
 984                 matching_opt->handler (sd, cpu, matching_opt->opt.val,
 985                                        argv [matching_argi + 1], 1/*is_command*/);
 986               else
 987                 sim_io_eprintf (sd, "Command `%s' requires no more than one argument\n",
 988                                 matching_opt->opt.name);
 989               break;
 990             case required_argument:
 991               if (argv [matching_argi + 1] == NULL)
 992                 sim_io_eprintf (sd, "Command `%s' requires an argument\n",
 993                                 matching_opt->opt.name);
 994               else if (argv [matching_argi + 2] == NULL)
 995                 matching_opt->handler (sd, cpu, matching_opt->opt.val,
 996                                        argv [matching_argi + 1], 1/*is_command*/);
 997               else
 998                 sim_io_eprintf (sd, "Command `%s' requires only one argument\n",
 999                                 matching_opt->opt.name);
1000             }
1001           freeargv (argv);
1002           return SIM_RC_OK;
1003         }
1004
1005       freeargv (argv);
1006     }
1007
1008   /* didn't find anything that remotly matched */
1009   return SIM_RC_FAIL;
1010 }