Shamusworld >> Repos - rmac/blob - rmac.c

   1 //
   2 // RMAC - Reboot's Macro Assembler for all Atari computers
   3 // RMAC.C - Main Application Code
   4 // Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
   5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
   6 // Source utilised with the kind permission of Landon Dyer
   7 //
   8
   9 #include "rmac.h"
  10 #include "6502.h"
  11 #include "debug.h"
  12 #include "direct.h"
  13 #include "error.h"
  14 #include "expr.h"
  15 #include "listing.h"
  16 #include "mark.h"
  17 #include "macro.h"
  18 #include "object.h"
  19 #include "procln.h"
  20 #include "riscasm.h"
  21 #include "sect.h"
  22 #include "symbol.h"
  23 #include "token.h"
  24 #include "version.h"
  25
  26 int perm_verb_flag;                             // Permanently verbose, interactive mode
  27 int list_flag;                                  // "-l" listing flag on command line
  28 int list_pag = 1;                               // Enable listing pagination by default
  29 int verb_flag;                                  // Be verbose about what's going on
  30 int m6502;                                              // 1, assembling 6502 code
  31 int as68_flag;                                  // as68 kludge mode
  32 int glob_flag;                                  // Assume undefined symbols are global
  33 int lsym_flag;                                  // Include local symbols in object file
  34 int sbra_flag;                                  // Warn about possible short branches
  35 int prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
  36 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  37 int obj_format;                                 // Object format flag
  38 int debug;                                              // [1..9] Enable debugging levels
  39 int err_flag;                                   // '-e' specified
  40 int err_fd;                                             // File to write error messages to
  41 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  42 int dsp56001;                                   // Assembling DSP 56001 code
  43 int list_fd;                                    // File to write listing to
  44 int regbank;                                    // RISC register bank
  45 int segpadsize;                                 // Segment padding size
  46 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  47 char * objfname;                                // Object filename pointer
  48 char * firstfname;                              // First source filename
  49 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  50 char * searchpath;                              // Search path for include files
  51 char defname[] = "noname.o";    // Default output filename
  52 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  53 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  54 int activefpu = FPU_NONE;               // Active FPU (none by default)
  55
  56
  57 //
  58 // Manipulate file extension.
  59 //
  60 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  61 // nonzero, any old extension is removed. If the file does not already have an
  62 // extension, 'extension' is appended to the filename.
  63 //
  64 char * fext(char * name, char * extension, int stripp)
  65 {
  66         char * s;
  67
  68         // Find beginning of "real" name (strip off path)
  69         char * beg = strrchr(name, SLASHCHAR);
  70
  71         if (beg == NULL)
  72                 beg = name;
  73
  74         // Clobber any old extension, if requested
  75         if (stripp)
  76         {
  77                 for(s=beg; *s && *s!='.'; ++s)
  78                         ;
  79
  80                 *s = '\0';
  81         }
  82
  83         if (strrchr(beg, '.') == NULL)
  84                 strcat(beg, extension);
  85
  86         return name;
  87 }
  88
  89
  90 //
  91 // Return 'item'nth element of semicolon-seperated pathnames specified in the
  92 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
  93 // nth path doesn't exist.
  94 //
  95 // ['item' ranges from 0 to N-1, where N = #elements in search path]
  96 //
  97 int nthpath(char * env_var, int itemno, char * buf)
  98 {
  99         char * s = searchpath;
 100
 101         if (s == NULL)
 102                 s = getenv(env_var);
 103
 104         if (s == NULL)
 105                 return 0;
 106
 107         while (itemno--)
 108                 while (*s != EOS && *s++ != ';')
 109                         ;
 110
 111         if (*s == EOS)
 112                 return 0;
 113
 114         while (*s != EOS && *s != ';')
 115                 *buf++ = *s++;
 116
 117         *buf++ = EOS;
 118
 119         return 1;
 120 }
 121
 122
 123 //
 124 // Display command line help
 125 //
 126 void DisplayHelp(void)
 127 {
 128         printf("Usage:\n"
 129                 "    %s [options] srcfile\n"
 130                 "\n"
 131                 "Options:\n"
 132                 "  -? or -h          Display usage information\n"
 133                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 134                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 135                 "  -f[format]        Output object file format\n"
 136                 "                    a: ALCYON (use this for ST)\n"
 137                 "                    b: BSD (use this for Jaguar)\n"
 138                 "                    e: ELF\n"
 139                 "                    x: com/exe/xex (Atari 800)\n"
 140                 "  -i[path]          Directory to search for include files\n"
 141                 "  -l[filename]      Create an output listing file\n"
 142                 "  -l*[filename]     Create an output listing file without pagination\n"
 143                 "  -m[cpu]           Select default CPU. Available options:\n"
 144                 "                    68000\n"
 145                 "                    68020\n"
 146                 "                    68030\n"
 147                 "                    68040\n"
 148                 "                    68060\n"
 149                 "                    6502\n"
 150                 "                    tom\n"
 151                 "                    jerry\n"
 152                 "  -n                Don't do things behind your back in RISC assembler\n"
 153                 "  -o file           Output file name\n"
 154                 "  +o[value]         Turn a specific optimisation on\n"
 155                 "                    Available optimisation values and default settings:\n"
 156                 "                    o0: Absolute long adddresses to word        (on)\n"
 157                 "                    o1: move.l #x,dn/an to moveq                (on)\n"
 158                 "                    o2: Word branches to short                  (on)\n"
 159                 "                    o3: Outer displacement 0(an) to (an)        (off)\n"
 160                 "                    o4: lea size(An),An to addq #size,An        (off)\n"
 161                 "                    o5: Absolute long base displacement to word (off)\n"
 162                 "                    o6: Null branches to NOP                    (off)\n"
 163                 "                    o7: clr.l Dx to moveq #0,Dx                 (off)\n"
 164                 "  ~o[value]         Turn a specific optimisation off\n"
 165                 "  +oall             Turn all optimisations on\n"
 166                 "  ~oall             Turn all optimisations off\n"
 167                 "  -p                Create an ST .prg (without symbols)\n"
 168                 "  -ps               Create an ST .prg (with symbols)\n"
 169                 "                    Forces -fa\n"
 170                 "  -r[size]          Pad segments to boundary size specified\n"
 171                 "                    w: word (2 bytes, default alignment)\n"
 172                 "                    l: long (4 bytes)\n"
 173                 "                    p: phrase (8 bytes)\n"
 174                 "                    d: double phrase (16 bytes)\n"
 175                 "                    q: quad phrase (32 bytes)\n"
 176                 "  -s                Warn about possible short branches\n"
 177                 "                    and applied optimisations\n"
 178                 "  -u                Force referenced and undefined symbols global\n"
 179                 "  -v                Set verbose mode\n"
 180                 "  -x                Turn on debugging mode\n"
 181                 "  -y[pagelen]       Set page line length (default: 61)\n"
 182                 "\n", cmdlnexec);
 183 }
 184
 185
 186 //
 187 // Display version information
 188 //
 189 void DisplayVersion(void)
 190 {
 191         printf("\n"
 192                 " _ __ _ __ ___   __ _  ___ \n"
 193                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 194                 "| |  | | | | | | (_| | (__ \n"
 195                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 196                 "\nReboot's Macro Assembler\n"
 197                 "Copyright (C) 199x Landon Dyer, 2011-2017 Reboot\n"
 198                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 199 }
 200
 201
 202 //
 203 // Parse optimisation options
 204 //
 205 int ParseOptimization(char * optstring)
 206 {
 207         int onoff = 0;
 208
 209         if (*optstring == '+')
 210                 onoff = 1;
 211         else if (*optstring != '~')
 212                 return ERROR;
 213
 214         if ((optstring[2] == 'a' || optstring[2] == 'A')
 215                 && (optstring[3] == 'l' || optstring[3] == 'L')
 216                 && (optstring[4] == 'l' || optstring[4] == 'L'))
 217         {
 218                 memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 219                 return OK;
 220         }
 221         else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 222         {
 223                 int opt_no = atoi(&optstring[2]);
 224
 225                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 226                 {
 227                         optim_flags[opt_no] = onoff;
 228                         return OK;
 229                 }
 230                 else
 231                         return ERROR;
 232         }
 233         else
 234         {
 235                 return ERROR;
 236         }
 237 }
 238
 239
 240 //
 241 // Process command line arguments and do an assembly
 242 //
 243 int Process(int argc, char ** argv)
 244 {
 245         int argno;                                              // Argument number
 246         SYM * sy;                                               // Pointer to a symbol record
 247         char * s;                                               // String pointer
 248         int fd;                                                 // File descriptor
 249         char fnbuf[FNSIZ];                              // Filename buffer
 250         int i;                                                  // Iterator
 251
 252         errcnt = 0;                                             // Initialise error count
 253         listing = 0;                                    // Initialise listing level
 254         list_flag = 0;                                  // Initialise listing flag
 255         verb_flag = perm_verb_flag;             // Initialise verbose flag
 256         as68_flag = 0;                                  // Initialise as68 kludge mode
 257         glob_flag = 0;                                  // Initialise .globl flag
 258         sbra_flag = 0;                                  // Initialise short branch flag
 259         debug = 0;                                              // Initialise debug flag
 260         searchpath = NULL;                              // Initialise search path
 261         objfname = NULL;                                // Initialise object filename
 262         list_fname = NULL;                              // Initialise listing filename
 263         err_fname = NULL;                               // Initialise error filename
 264         obj_format = BSD;                               // Initialise object format
 265         firstfname = NULL;                              // Initialise first filename
 266         err_fd = ERROUT;                                // Initialise error file descriptor
 267         err_flag = 0;                                   // Initialise error flag
 268         rgpu = 0;                                               // Initialise GPU assembly flag
 269         rdsp = 0;                                               // Initialise DSP assembly flag
 270         lsym_flag = 1;                                  // Include local symbols in object file
 271         regbank = BANK_N;                               // No RISC register bank specified
 272         orgactive = 0;                                  // Not in RISC org section
 273         orgwarning = 0;                                 // No ORG warning issued
 274         segpadsize = 2;                                 // Initialise segment padding size
 275         m6502 = 0;                                              // 6502 mode off by default
 276
 277         // Initialise modules
 278         InitSymbolTable();                              // Symbol table
 279         InitTokenizer();                                // Tokenizer
 280         InitLineProcessor();                    // Line processor
 281         InitExpression();                               // Expression analyzer
 282         InitSection();                                  // Section manager / code generator
 283         InitMark();                                             // Mark tape-recorder
 284         InitMacro();                                    // Macro processor
 285         InitListing();                                  // Listing generator
 286         Init6502();                                             // 6502 assembler
 287
 288         // Process command line arguments and assemble source files
 289         for(argno=0; argno<argc; argno++)
 290         {
 291                 if (*argv[argno] == '-')
 292                 {
 293                         switch (argv[argno][1])
 294                         {
 295                         case 'd':                               // Define symbol
 296                         case 'D':
 297                                 for(s=argv[argno]+2; *s!=EOS;)
 298                                 {
 299                                         if (*s++ == '=')
 300                                         {
 301                                                 s[-1] = EOS;
 302                                                 break;
 303                                         }
 304                                 }
 305
 306                                 if (argv[argno][2] == EOS)
 307                                 {
 308                                         printf("-d: empty symbol\n");
 309                                         errcnt++;
 310                                         return errcnt;
 311                                 }
 312
 313                                 sy = lookup(argv[argno] + 2, 0, 0);
 314
 315                                 if (sy == NULL)
 316                                 {
 317                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 318                                         sy->svalue = 0;
 319                                 }
 320
 321                                 sy->sattr = DEFINED | EQUATED | ABS;
 322                                 sy->svalue = (*s ? (uint32_t)atoi(s) : 0);
 323                                 break;
 324                         case 'e':                               // Redirect error message output
 325                         case 'E':
 326                                 err_fname = argv[argno] + 2;
 327                                 break;
 328                         case 'f':                               // -f<format>
 329                         case 'F':
 330                                 switch (argv[argno][2])
 331                                 {
 332                                 case EOS:
 333                                 case 'a':                       // -fa = Alcyon [the default]
 334                                 case 'A':
 335                                         obj_format = ALCYON;
 336                                         break;
 337                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 338                                 case 'B':
 339                                         obj_format = BSD;
 340                                         break;
 341                                 case 'e':                       // -fe = ELF
 342                                 case 'E':
 343                                         obj_format = ELF;
 344                                         break;
 345                                 case 'x':                       // -fx = COM/EXE/XEX
 346                                 case 'X':
 347                                         obj_format = XEX;
 348                                         break;
 349                                 default:
 350                                         printf("-f: unknown object format specified\n");
 351                                         errcnt++;
 352                                         return errcnt;
 353                                 }
 354                                 break;
 355                         case 'g':                               // Debugging flag
 356                         case 'G':
 357                                 printf("Debugging flag (-g) not yet implemented\n");
 358                                 break;
 359                         case 'i':                               // Set directory search path
 360                         case 'I':
 361                                 searchpath = argv[argno] + 2;
 362                                 break;
 363                         case 'l':                               // Produce listing file
 364                         case 'L':
 365                                 if (*(argv[argno] + 2) == '*')
 366                                 {
 367                                         list_fname = argv[argno] + 3;
 368                                         list_pag = 0;    // Special case - turn off pagination
 369                                 }
 370                                 else
 371                                 {
 372                                         list_fname = argv[argno] + 2;
 373                                 }
 374
 375                                 listing = 1;
 376                                 list_flag = 1;
 377                                 lnsave++;
 378                                 break;
 379                         case 'm':
 380                         case 'M':
 381                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 382                                         d_68000();
 383                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 384                                         d_68020();
 385                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 386                                         d_68030();
 387                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 388                                         d_68040();
 389                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 390                                         d_68060();
 391                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 392                                         d_68881();
 393                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 394                                         d_68882();
 395                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 396                                         d_56001();
 397                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 398                                         d_6502();
 399                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 400                                         d_gpu();
 401                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 402                                         d_dsp();
 403                                 else
 404                                 {
 405                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 406                                         errcnt++;
 407                                         return errcnt;
 408                                 }
 409                                 break;
 410                         case 'o':                               // Direct object file output
 411                         case 'O':
 412                                 if (argv[argno][2] != EOS)
 413                                         objfname = argv[argno] + 2;
 414                                 else
 415                                 {
 416                                         if (++argno >= argc)
 417                                         {
 418                                                 printf("Missing argument to -o");
 419                                                 errcnt++;
 420                                                 return errcnt;
 421                                         }
 422
 423                                         objfname = argv[argno];
 424                                 }
 425
 426                                 break;
 427                         case 'p':               /* -p: generate ".PRG" executable output */
 428                         case 'P':
 429                                 /*
 430                                  * -p           .PRG generation w/o symbols
 431                                  * -ps  .PRG generation with symbols
 432                                  */
 433                                 switch (argv[argno][2])
 434                                 {
 435                                         case EOS:
 436                                                 prg_flag = 1;
 437                                                 break;
 438
 439                                         case 's':
 440                                         case 'S':
 441                                                 prg_flag = 2;
 442                                                 break;
 443
 444                                         default:
 445                                                 printf("-p: syntax error\n");
 446                                                 errcnt++;
 447                                                 return errcnt;
 448                                 }
 449
 450                                 // Enforce Alcyon object format - kind of silly
 451                                 // to ask for .prg output without it!
 452                                 obj_format = ALCYON;
 453                                 break;
 454                         case 'r':                               // Pad seg to requested boundary size
 455                         case 'R':
 456                                 switch(argv[argno][2])
 457                                 {
 458                                 case 'w': case 'W': segpadsize = 2;  break;
 459                                 case 'l': case 'L': segpadsize = 4;  break;
 460                                 case 'p': case 'P': segpadsize = 8;  break;
 461                                 case 'd': case 'D': segpadsize = 16; break;
 462                                 case 'q': case 'Q': segpadsize = 32; break;
 463                                 default: segpadsize = 2; break; // Effective autoeven();
 464                                 }
 465                                 break;
 466                         case 's':                               // Warn about possible short branches
 467                         case 'S':
 468                                 sbra_flag = 1;
 469                                 break;
 470                         case 'u':                               // Make undefined symbols .globl
 471                         case 'U':
 472                                 glob_flag = 1;
 473                                 break;
 474                         case 'v':                               // Verbose flag
 475                         case 'V':
 476                                 verb_flag++;
 477
 478                                 if (verb_flag > 1)
 479                                         DisplayVersion();
 480
 481                                 break;
 482                         case 'x':                               // Turn on debugging
 483                         case 'X':
 484                                 debug = 1;
 485                                 printf("~ Debugging ON\n");
 486                                 break;
 487                         case 'y':                               // -y<pagelen>
 488                         case 'Y':
 489                                 pagelen = atoi(argv[argno] + 2);
 490
 491                                 if (pagelen < 10)
 492                                 {
 493                                         printf("-y: bad page length\n");
 494                                         errcnt++;
 495                                         return errcnt;
 496                                 }
 497
 498                                 break;
 499                         case EOS:                               // Input is stdin
 500                                 if (firstfname == NULL) // Kludge first filename
 501                                         firstfname = defname;
 502
 503                                 include(0, "(stdin)");
 504                                 Assemble();
 505                                 break;
 506                         case 'h':                               // Display command line usage
 507                         case 'H':
 508                         case '?':
 509                                 DisplayVersion();
 510                                 DisplayHelp();
 511                                 errcnt++;
 512                                 break;
 513                         case 'n':                               // Turn off legacy mode
 514                         case 'N':
 515                                 legacy_flag = 0;
 516                                 printf("Legacy mode OFF\n");
 517                                 break;
 518                         default:
 519                                 DisplayVersion();
 520                                 printf("Unknown switch: %s\n\n", argv[argno]);
 521                                 DisplayHelp();
 522                                 errcnt++;
 523                                 break;
 524                         }
 525                 }
 526                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 527                 {
 528                         if (ParseOptimization(argv[argno]) != OK)
 529                         {
 530                                 DisplayVersion();
 531                                 printf("Unknown switch: %s\n\n", argv[argno]);
 532                                 DisplayHelp();
 533                                 errcnt++;
 534                                 break;
 535                         }
 536                 }
 537                 else
 538                 {
 539                         // Record first filename.
 540                         if (firstfname == NULL)
 541                                 firstfname = argv[argno];
 542
 543                         strcpy(fnbuf, argv[argno]);
 544                         fext(fnbuf, ".s", 0);
 545                         fd = open(fnbuf, 0);
 546
 547                         if (fd < 0)
 548                         {
 549                                 printf("Cannot open: %s\n", fnbuf);
 550                                 errcnt++;
 551                                 continue;
 552                         }
 553
 554                         include(fd, fnbuf);
 555                         Assemble();
 556                 }
 557         }
 558
 559         // Wind-up processing;
 560         // o  save current section (no more code generation)
 561         // o  do auto-even of all sections (or boundary alignment as requested
 562         //    through '-r')
 563     // o  save the last pc value for 6502 (if we used 6502 at all) and
 564     //    detemine if the last section contains anything
 565         // o  determine name of object file:
 566         //    -  "foo.o" for linkable output;
 567         //    -  "foo.prg" for GEMDOS executable (-p flag).
 568         SaveSection();
 569
 570         for(i=TEXT; i<=BSS; i<<=1)
 571         {
 572                 SwitchSection(i);
 573
 574                 switch(segpadsize)
 575                 {
 576                 case 2:  d_even();    break;
 577                 case 4:  d_long();    break;
 578                 case 8:  d_phrase();  break;
 579                 case 16: d_dphrase(); break;
 580                 case 32: d_qphrase(); break;
 581                 }
 582
 583                 SaveSection();
 584         }
 585
 586         SwitchSection(M6502);
 587
 588         if (sloc != currentorg[0])
 589         {
 590                 currentorg[1] = sloc;
 591                 currentorg += 2;
 592         }
 593
 594         if (objfname == NULL)
 595         {
 596                 if (firstfname == NULL)
 597                         firstfname = defname;
 598
 599                 strcpy(fnbuf, firstfname);
 600                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 601                 objfname = fnbuf;
 602         }
 603
 604         // With one pass finished, go back and:
 605         // (1)   run through all the fixups and resolve forward references;
 606         // (1.5) ensure that remaining fixups can be handled by the linker
 607         //       (`lo68' format, extended (postfix) format....)
 608         // (2)   generate the output file image and symbol table;
 609         // (3)   generate relocation information from left-over fixups.
 610         ResolveAllFixups();                                             // Do all fixups
 611         StopMark();                                                             // Stop mark tape-recorder
 612
 613         if (errcnt == 0)
 614         {
 615                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 616                         cantcreat(objfname);
 617
 618                 if (verb_flag)
 619                 {
 620                         s = (prg_flag ? "executable" : "object");
 621                         printf("[Writing %s file: %s]\n", s, objfname);
 622                 }
 623
 624                 WriteObject(fd);
 625                 close(fd);
 626
 627                 if (errcnt != 0)
 628                         unlink(objfname);
 629         }
 630
 631         if (list_flag)
 632         {
 633                 if (verb_flag)
 634                         printf("[Wrapping-up listing file]\n");
 635
 636                 listing = 1;
 637                 symtable();
 638                 close(list_fd);
 639         }
 640
 641         if (err_flag)
 642                 close(err_fd);
 643
 644         DEBUG dump_everything();
 645
 646         return errcnt;
 647 }
 648
 649
 650 //
 651 // Determine processor endianess
 652 //
 653 int GetEndianess(void)
 654 {
 655         int i = 1;
 656         char * p = (char *)&i;
 657
 658         if (p[0] == 1)
 659                 return 0;
 660
 661         return 1;
 662 }
 663
 664
 665 //
 666 // Application entry point
 667 //
 668 int main(int argc, char ** argv)
 669 {
 670         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 671         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 672
 673         // Set legacy optimisation flags to on and everything else to off
 674         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 675         optim_flags[OPT_ABS_SHORT] =
 676                 optim_flags[OPT_MOVEL_MOVEQ] =
 677                 optim_flags[OPT_BSR_BCC_S] = 1;
 678
 679         cmdlnexec = argv[0];                    // Obtain executable name
 680         endian = GetEndianess();                // Get processor endianess
 681
 682         // If commands were passed in, process them
 683         if (argc > 1)
 684                 return Process(argc - 1, argv + 1);
 685
 686         DisplayVersion();
 687         DisplayHelp();
 688
 689         return 0;
 690 }
 691