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, 2011-2018 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 prg_extend;                                 // !=0, output extended .PRG symbols
  37 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  38 int obj_format;                                 // Object format flag
  39 int debug;                                              // [1..9] Enable debugging levels
  40 int err_flag;                                   // '-e' specified
  41 int err_fd;                                             // File to write error messages to
  42 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  43 int dsp56001;                                   // Assembling DSP 56001 code
  44 int list_fd;                                    // File to write listing to
  45 int regbank;                                    // RISC register bank
  46 int segpadsize;                                 // Segment padding size
  47 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  48 char * objfname;                                // Object filename pointer
  49 char * firstfname;                              // First source filename
  50 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  51 char * searchpath;                              // Search path for include files
  52 char defname[] = "noname.o";    // Default output filename
  53 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  54 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  55 int activefpu = FPU_NONE;               // Active FPU (none by default)
  56
  57
  58 //
  59 // Manipulate file extension.
  60 //
  61 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  62 // nonzero, any old extension is removed. If the file does not already have an
  63 // extension, 'extension' is appended to the filename.
  64 //
  65 char * fext(char * name, char * extension, int stripp)
  66 {
  67         char * s;
  68
  69         // Find beginning of "real" name (strip off path)
  70         char * beg = strrchr(name, SLASHCHAR);
  71
  72         if (beg == NULL)
  73                 beg = name;
  74
  75         // Clobber any old extension, if requested
  76         if (stripp)
  77         {
  78                 for(s=beg; *s && *s!='.'; ++s)
  79                         ;
  80
  81                 *s = '\0';
  82         }
  83
  84         if (strrchr(beg, '.') == NULL)
  85                 strcat(beg, extension);
  86
  87         return name;
  88 }
  89
  90
  91 //
  92 // Return 'item'nth element of semicolon-seperated pathnames specified in the
  93 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
  94 // nth path doesn't exist.
  95 //
  96 // ['item' ranges from 0 to N-1, where N = #elements in search path]
  97 //
  98 int nthpath(char * env_var, int itemno, char * buf)
  99 {
 100         char * s = searchpath;
 101
 102         if (s == NULL)
 103                 s = getenv(env_var);
 104
 105         if (s == NULL)
 106                 return 0;
 107
 108         while (itemno--)
 109                 while (*s != EOS && *s++ != ';')
 110                         ;
 111
 112         if (*s == EOS)
 113                 return 0;
 114
 115         while (*s != EOS && *s != ';')
 116                 *buf++ = *s++;
 117
 118         *buf++ = EOS;
 119
 120         return 1;
 121 }
 122
 123
 124 //
 125 // Display command line help
 126 //
 127 void DisplayHelp(void)
 128 {
 129         printf("Usage:\n"
 130                 "    %s [options] srcfile\n"
 131                 "\n"
 132                 "Options:\n"
 133                 "  -? or -h          Display usage information\n"
 134                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 135                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 136                 "  -f[format]        Output object file format\n"
 137                 "                    a: ALCYON (use this for ST)\n"
 138                 "                    b: BSD (use this for Jaguar)\n"
 139                 "                    e: ELF\n"
 140                 "                    x: com/exe/xex (Atari 800)\n"
 141                 "  -i[path]          Directory to search for include files\n"
 142                 "  -l[filename]      Create an output listing file\n"
 143                 "  -l*[filename]     Create an output listing file without pagination\n"
 144                 "  -m[cpu]           Select default CPU. Available options:\n"
 145                 "                    68000\n"
 146                 "                    68020\n"
 147                 "                    68030\n"
 148                 "                    68040\n"
 149                 "                    68060\n"
 150                 "                    6502\n"
 151                 "                    tom\n"
 152                 "                    jerry\n"
 153                 "  -n                Don't do things behind your back in RISC assembler\n"
 154                 "  -o file           Output file name\n"
 155                 "  +o[value]         Turn a specific optimisation on\n"
 156                 "                    Available optimisation values and default settings:\n"
 157                 "                    o0: Absolute long adddresses to word        (on)\n"
 158                 "                    o1: move.l #x,dn/an to moveq                (on)\n"
 159                 "                    o2: Word branches to short                  (on)\n"
 160                 "                    o3: Outer displacement 0(an) to (an)        (off)\n"
 161                 "                    o4: lea size(An),An to addq #size,An        (off)\n"
 162                 "                    o5: Absolute long base displacement to word (off)\n"
 163                 "                    o6: Null branches to NOP                    (off)\n"
 164                 "                    o7: clr.l Dx to moveq #0,Dx                 (off)\n"
 165                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy        (off)\n"
 166                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy          (off)\n"
 167                 "  ~o[value]         Turn a specific optimisation off\n"
 168                 "  +oall             Turn all optimisations on\n"
 169                 "  ~oall             Turn all optimisations off\n"
 170                 "  -p                Create an ST .prg (without symbols)\n"
 171                 "  -ps               Create an ST .prg (with symbols)\n"
 172                 "  -px               Create an ST .prg (with exsymbols)\n"
 173                 "                    Forces -fa\n"
 174                 "  -r[size]          Pad segments to boundary size specified\n"
 175                 "                    w: word (2 bytes, default alignment)\n"
 176                 "                    l: long (4 bytes)\n"
 177                 "                    p: phrase (8 bytes)\n"
 178                 "                    d: double phrase (16 bytes)\n"
 179                 "                    q: quad phrase (32 bytes)\n"
 180                 "  -s                Warn about possible short branches\n"
 181                 "                    and applied optimisations\n"
 182                 "  -u                Force referenced and undefined symbols global\n"
 183                 "  -v                Set verbose mode\n"
 184                 "  -x                Turn on debugging mode\n"
 185                 "  -y[pagelen]       Set page line length (default: 61)\n"
 186                 "\n", cmdlnexec);
 187 }
 188
 189
 190 //
 191 // Display version information
 192 //
 193 void DisplayVersion(void)
 194 {
 195         printf("\n"
 196                 " _ __ _ __ ___   __ _  ___ \n"
 197                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 198                 "| |  | | | | | | (_| | (__ \n"
 199                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 200                 "\nReboot's Macro Assembler\n"
 201                 "Copyright (C) 199x Landon Dyer, 2011-2017 Reboot\n"
 202                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 203 }
 204
 205
 206 //
 207 // Parse optimisation options
 208 //
 209 int ParseOptimization(char * optstring)
 210 {
 211         int onoff = 0;
 212
 213         if (*optstring == '+')
 214                 onoff = 1;
 215         else if (*optstring != '~')
 216                 return ERROR;
 217
 218         if ((optstring[2] == 'a' || optstring[2] == 'A')
 219                 && (optstring[3] == 'l' || optstring[3] == 'L')
 220                 && (optstring[4] == 'l' || optstring[4] == 'L'))
 221         {
 222                 memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 223                 return OK;
 224         }
 225         else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 226         {
 227                 int opt_no = atoi(&optstring[2]);
 228
 229                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 230                 {
 231                         optim_flags[opt_no] = onoff;
 232                         return OK;
 233                 }
 234                 else
 235                         return ERROR;
 236         }
 237         else
 238         {
 239                 return ERROR;
 240         }
 241 }
 242
 243
 244 //
 245 // Process command line arguments and do an assembly
 246 //
 247 int Process(int argc, char ** argv)
 248 {
 249         int argno;                                              // Argument number
 250         SYM * sy;                                               // Pointer to a symbol record
 251         char * s;                                               // String pointer
 252         int fd;                                                 // File descriptor
 253         char fnbuf[FNSIZ];                              // Filename buffer
 254         int i;                                                  // Iterator
 255
 256         errcnt = 0;                                             // Initialise error count
 257         listing = 0;                                    // Initialise listing level
 258         list_flag = 0;                                  // Initialise listing flag
 259         verb_flag = perm_verb_flag;             // Initialise verbose flag
 260         as68_flag = 0;                                  // Initialise as68 kludge mode
 261         glob_flag = 0;                                  // Initialise .globl flag
 262         sbra_flag = 0;                                  // Initialise short branch flag
 263         debug = 0;                                              // Initialise debug flag
 264         searchpath = NULL;                              // Initialise search path
 265         objfname = NULL;                                // Initialise object filename
 266         list_fname = NULL;                              // Initialise listing filename
 267         err_fname = NULL;                               // Initialise error filename
 268         obj_format = BSD;                               // Initialise object format
 269         firstfname = NULL;                              // Initialise first filename
 270         err_fd = ERROUT;                                // Initialise error file descriptor
 271         err_flag = 0;                                   // Initialise error flag
 272         rgpu = 0;                                               // Initialise GPU assembly flag
 273         rdsp = 0;                                               // Initialise DSP assembly flag
 274         lsym_flag = 1;                                  // Include local symbols in object file
 275         regbank = BANK_N;                               // No RISC register bank specified
 276         orgactive = 0;                                  // Not in RISC org section
 277         orgwarning = 0;                                 // No ORG warning issued
 278         segpadsize = 2;                                 // Initialise segment padding size
 279         m6502 = 0;                                              // 6502 mode off by default
 280
 281         // Initialise modules
 282         InitSymbolTable();                              // Symbol table
 283         InitTokenizer();                                // Tokenizer
 284         InitLineProcessor();                    // Line processor
 285         InitExpression();                               // Expression analyzer
 286         InitSection();                                  // Section manager / code generator
 287         InitMark();                                             // Mark tape-recorder
 288         InitMacro();                                    // Macro processor
 289         InitListing();                                  // Listing generator
 290         Init6502();                                             // 6502 assembler
 291
 292         // Process command line arguments and assemble source files
 293         for(argno=0; argno<argc; argno++)
 294         {
 295                 if (*argv[argno] == '-')
 296                 {
 297                         switch (argv[argno][1])
 298                         {
 299                         case 'd':                               // Define symbol
 300                         case 'D':
 301                                 for(s=argv[argno]+2; *s!=EOS;)
 302                                 {
 303                                         if (*s++ == '=')
 304                                         {
 305                                                 s[-1] = EOS;
 306                                                 break;
 307                                         }
 308                                 }
 309
 310                                 if (argv[argno][2] == EOS)
 311                                 {
 312                                         printf("-d: empty symbol\n");
 313                                         errcnt++;
 314                                         return errcnt;
 315                                 }
 316
 317                                 sy = lookup(argv[argno] + 2, 0, 0);
 318
 319                                 if (sy == NULL)
 320                                 {
 321                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 322                                         sy->svalue = 0;
 323                                 }
 324
 325                                 sy->sattr = DEFINED | EQUATED | ABS;
 326                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 327                                 break;
 328                         case 'e':                               // Redirect error message output
 329                         case 'E':
 330                                 err_fname = argv[argno] + 2;
 331                                 break;
 332                         case 'f':                               // -f<format>
 333                         case 'F':
 334                                 switch (argv[argno][2])
 335                                 {
 336                                 case EOS:
 337                                 case 'a':                       // -fa = Alcyon [the default]
 338                                 case 'A':
 339                                         obj_format = ALCYON;
 340                                         break;
 341                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 342                                 case 'B':
 343                                         obj_format = BSD;
 344                                         break;
 345                                 case 'e':                       // -fe = ELF
 346                                 case 'E':
 347                                         obj_format = ELF;
 348                                         break;
 349                                 case 'x':                       // -fx = COM/EXE/XEX
 350                                 case 'X':
 351                                         obj_format = XEX;
 352                                         break;
 353                                 default:
 354                                         printf("-f: unknown object format specified\n");
 355                                         errcnt++;
 356                                         return errcnt;
 357                                 }
 358                                 break;
 359                         case 'g':                               // Debugging flag
 360                         case 'G':
 361                                 printf("Debugging flag (-g) not yet implemented\n");
 362                                 break;
 363                         case 'i':                               // Set directory search path
 364                         case 'I':
 365                                 searchpath = argv[argno] + 2;
 366                                 break;
 367                         case 'l':                               // Produce listing file
 368                         case 'L':
 369                                 if (*(argv[argno] + 2) == '*')
 370                                 {
 371                                         list_fname = argv[argno] + 3;
 372                                         list_pag = 0;    // Special case - turn off pagination
 373                                 }
 374                                 else
 375                                 {
 376                                         list_fname = argv[argno] + 2;
 377                                 }
 378
 379                                 listing = 1;
 380                                 list_flag = 1;
 381                                 lnsave++;
 382                                 break;
 383                         case 'm':
 384                         case 'M':
 385                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 386                                         d_68000();
 387                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 388                                         d_68020();
 389                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 390                                         d_68030();
 391                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 392                                         d_68040();
 393                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 394                                         d_68060();
 395                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 396                                         d_68881();
 397                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 398                                         d_68882();
 399                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 400                                         d_56001();
 401                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 402                                         d_6502();
 403                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 404                                         d_gpu();
 405                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 406                                         d_dsp();
 407                                 else
 408                                 {
 409                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 410                                         errcnt++;
 411                                         return errcnt;
 412                                 }
 413                                 break;
 414                         case 'o':                               // Direct object file output
 415                         case 'O':
 416                                 if (argv[argno][2] != EOS)
 417                                         objfname = argv[argno] + 2;
 418                                 else
 419                                 {
 420                                         if (++argno >= argc)
 421                                         {
 422                                                 printf("Missing argument to -o");
 423                                                 errcnt++;
 424                                                 return errcnt;
 425                                         }
 426
 427                                         objfname = argv[argno];
 428                                 }
 429
 430                                 break;
 431                         case 'p':               /* -p: generate ".PRG" executable output */
 432                         case 'P':
 433                                 /*
 434                                  * -p           .PRG generation w/o symbols
 435                                  * -ps          .PRG generation with symbols
 436                                  * -px          .PRG generation with extended symbols
 437                                  */
 438                                 switch (argv[argno][2])
 439                                 {
 440                                         case EOS:
 441                                                 prg_flag = 1;
 442                                                 break;
 443
 444                                         case 's':
 445                                         case 'S':
 446                                                 prg_flag = 2;
 447                                                 break;
 448
 449                                         case 'x':
 450                                         case 'X':
 451                                                 prg_flag = 3;
 452                                                 break;
 453
 454                                         default:
 455                                                 printf("-p: syntax error\n");
 456                                                 errcnt++;
 457                                                 return errcnt;
 458                                 }
 459
 460                                 // Enforce Alcyon object format - kind of silly
 461                                 // to ask for .prg output without it!
 462                                 obj_format = ALCYON;
 463                                 break;
 464                         case 'r':                               // Pad seg to requested boundary size
 465                         case 'R':
 466                                 switch(argv[argno][2])
 467                                 {
 468                                 case 'w': case 'W': segpadsize = 2;  break;
 469                                 case 'l': case 'L': segpadsize = 4;  break;
 470                                 case 'p': case 'P': segpadsize = 8;  break;
 471                                 case 'd': case 'D': segpadsize = 16; break;
 472                                 case 'q': case 'Q': segpadsize = 32; break;
 473                                 default: segpadsize = 2; break; // Effective autoeven();
 474                                 }
 475                                 break;
 476                         case 's':                               // Warn about possible short branches
 477                         case 'S':
 478                                 sbra_flag = 1;
 479                                 break;
 480                         case 'u':                               // Make undefined symbols .globl
 481                         case 'U':
 482                                 glob_flag = 1;
 483                                 break;
 484                         case 'v':                               // Verbose flag
 485                         case 'V':
 486                                 verb_flag++;
 487
 488                                 if (verb_flag > 1)
 489                                         DisplayVersion();
 490
 491                                 break;
 492                         case 'x':                               // Turn on debugging
 493                         case 'X':
 494                                 debug = 1;
 495                                 printf("~ Debugging ON\n");
 496                                 break;
 497                         case 'y':                               // -y<pagelen>
 498                         case 'Y':
 499                                 pagelen = atoi(argv[argno] + 2);
 500
 501                                 if (pagelen < 10)
 502                                 {
 503                                         printf("-y: bad page length\n");
 504                                         errcnt++;
 505                                         return errcnt;
 506                                 }
 507
 508                                 break;
 509                         case EOS:                               // Input is stdin
 510                                 if (firstfname == NULL) // Kludge first filename
 511                                         firstfname = defname;
 512
 513                                 include(0, "(stdin)");
 514                                 Assemble();
 515                                 break;
 516                         case 'h':                               // Display command line usage
 517                         case 'H':
 518                         case '?':
 519                                 DisplayVersion();
 520                                 DisplayHelp();
 521                                 errcnt++;
 522                                 break;
 523                         case 'n':                               // Turn off legacy mode
 524                         case 'N':
 525                                 legacy_flag = 0;
 526                                 printf("Legacy mode OFF\n");
 527                                 break;
 528                         default:
 529                                 DisplayVersion();
 530                                 printf("Unknown switch: %s\n\n", argv[argno]);
 531                                 DisplayHelp();
 532                                 errcnt++;
 533                                 break;
 534                         }
 535                 }
 536                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 537                 {
 538                         if (ParseOptimization(argv[argno]) != OK)
 539                         {
 540                                 DisplayVersion();
 541                                 printf("Unknown switch: %s\n\n", argv[argno]);
 542                                 DisplayHelp();
 543                                 errcnt++;
 544                                 break;
 545                         }
 546                 }
 547                 else
 548                 {
 549                         // Record first filename.
 550                         if (firstfname == NULL)
 551                                 firstfname = argv[argno];
 552
 553                         strcpy(fnbuf, argv[argno]);
 554                         fext(fnbuf, ".s", 0);
 555                         fd = open(fnbuf, 0);
 556
 557                         if (fd < 0)
 558                         {
 559                                 printf("Cannot open: %s\n", fnbuf);
 560                                 errcnt++;
 561                                 continue;
 562                         }
 563
 564                         include(fd, fnbuf);
 565                         Assemble();
 566                 }
 567         }
 568
 569         // Wind-up processing;
 570         // o  save current section (no more code generation)
 571         // o  do auto-even of all sections (or boundary alignment as requested
 572         //    through '-r')
 573     // o  save the last pc value for 6502 (if we used 6502 at all) and
 574     //    detemine if the last section contains anything
 575         // o  determine name of object file:
 576         //    -  "foo.o" for linkable output;
 577         //    -  "foo.prg" for GEMDOS executable (-p flag).
 578         SaveSection();
 579
 580         for(i=TEXT; i<=BSS; i<<=1)
 581         {
 582                 SwitchSection(i);
 583
 584                 switch(segpadsize)
 585                 {
 586                 case 2:  d_even();    break;
 587                 case 4:  d_long();    break;
 588                 case 8:  d_phrase();  break;
 589                 case 16: d_dphrase(); break;
 590                 case 32: d_qphrase(); break;
 591                 }
 592
 593                 SaveSection();
 594         }
 595
 596         SwitchSection(M6502);
 597
 598         if (sloc != currentorg[0])
 599         {
 600                 currentorg[1] = sloc;
 601                 currentorg += 2;
 602         }
 603
 604         if (objfname == NULL)
 605         {
 606                 if (firstfname == NULL)
 607                         firstfname = defname;
 608
 609                 strcpy(fnbuf, firstfname);
 610                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 611                 objfname = fnbuf;
 612         }
 613
 614         // With one pass finished, go back and:
 615         // (1)   run through all the fixups and resolve forward references;
 616         // (1.5) ensure that remaining fixups can be handled by the linker
 617         //       (`lo68' format, extended (postfix) format....)
 618         // (2)   generate the output file image and symbol table;
 619         // (3)   generate relocation information from left-over fixups.
 620         ResolveAllFixups();                                             // Do all fixups
 621         StopMark();                                                             // Stop mark tape-recorder
 622
 623         if (errcnt == 0)
 624         {
 625                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 626                         cantcreat(objfname);
 627
 628                 if (verb_flag)
 629                 {
 630                         s = (prg_flag ? "executable" : "object");
 631                         printf("[Writing %s file: %s]\n", s, objfname);
 632                 }
 633
 634                 WriteObject(fd);
 635                 close(fd);
 636
 637                 if (errcnt != 0)
 638                         unlink(objfname);
 639         }
 640
 641         if (list_flag)
 642         {
 643                 if (verb_flag)
 644                         printf("[Wrapping-up listing file]\n");
 645
 646                 listing = 1;
 647                 symtable();
 648                 close(list_fd);
 649         }
 650
 651         if (err_flag)
 652                 close(err_fd);
 653
 654         DEBUG dump_everything();
 655
 656         return errcnt;
 657 }
 658
 659
 660 //
 661 // Determine processor endianess
 662 //
 663 int GetEndianess(void)
 664 {
 665         int i = 1;
 666         char * p = (char *)&i;
 667
 668         if (p[0] == 1)
 669                 return 0;
 670
 671         return 1;
 672 }
 673
 674
 675 //
 676 // Application entry point
 677 //
 678 int main(int argc, char ** argv)
 679 {
 680         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 681         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 682
 683         // Set legacy optimisation flags to on and everything else to off
 684         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 685         optim_flags[OPT_ABS_SHORT] =
 686                 optim_flags[OPT_MOVEL_MOVEQ] =
 687                 optim_flags[OPT_BSR_BCC_S] = 1;
 688
 689         cmdlnexec = argv[0];                    // Obtain executable name
 690         endian = GetEndianess();                // Get processor endianess
 691
 692         // If commands were passed in, process them
 693         if (argc > 1)
 694                 return Process(argc - 1, argv + 1);
 695
 696         DisplayVersion();
 697         DisplayHelp();
 698
 699         return 0;
 700 }
 701