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 robjproc;                                   // Assembling Jaguar Object Processor code
  44 int dsp56001;                                   // Assembling DSP 56001 code
  45 int list_fd;                                    // File to write listing to
  46 int regbank;                                    // RISC register bank
  47 int segpadsize;                                 // Segment padding size
  48 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  49 char * objfname;                                // Object filename pointer
  50 char * firstfname;                              // First source filename
  51 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  52 char * searchpath;                              // Search path for include files
  53 char defname[] = "noname.o";    // Default output filename
  54 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  55 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  56 int activefpu = FPU_NONE;               // Active FPU (none by default)
  57
  58
  59 //
  60 // Convert a string to uppercase
  61 //
  62 void strtoupper(char * s)
  63 {
  64         while (*s)
  65                 *s++ &= 0xDF;
  66 }
  67
  68
  69 //
  70 // Manipulate file extension.
  71 //
  72 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  73 // nonzero, any old extension is removed. If the file does not already have an
  74 // extension, 'extension' is appended to the filename.
  75 //
  76 char * fext(char * name, char * extension, int stripp)
  77 {
  78         char * s;
  79
  80         // Find beginning of "real" name (strip off path)
  81         char * beg = strrchr(name, SLASHCHAR);
  82
  83         if (beg == NULL)
  84                 beg = name;
  85
  86         // Clobber any old extension, if requested
  87         if (stripp)
  88         {
  89                 for(s=beg; *s && *s!='.'; ++s)
  90                         ;
  91
  92                 *s = '\0';
  93         }
  94
  95         if (strrchr(beg, '.') == NULL)
  96                 strcat(beg, extension);
  97
  98         return name;
  99 }
 100
 101
 102 //
 103 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 104 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 105 // nth path doesn't exist.
 106 //
 107 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 108 //
 109 int nthpath(char * env_var, int itemno, char * buf)
 110 {
 111         char * s = searchpath;
 112
 113         if (s == NULL)
 114                 s = getenv(env_var);
 115
 116         if (s == NULL)
 117                 return 0;
 118
 119         while (itemno--)
 120                 while (*s != EOS && *s++ != ';')
 121                         ;
 122
 123         if (*s == EOS)
 124                 return 0;
 125
 126         while (*s != EOS && *s != ';')
 127                 *buf++ = *s++;
 128
 129         *buf++ = EOS;
 130
 131         return 1;
 132 }
 133
 134
 135 //
 136 // Display command line help
 137 //
 138 void DisplayHelp(void)
 139 {
 140         printf("Usage:\n"
 141                 "    %s [options] srcfile\n"
 142                 "\n"
 143                 "Options:\n"
 144                 "  -? or -h          Display usage information\n"
 145                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 146                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 147                 "  -f[format]        Output object file format\n"
 148                 "                    a: ALCYON (use this for ST)\n"
 149                 "                    b: BSD (use this for Jaguar)\n"
 150                 "                    e: ELF\n"
 151                 "                    x: com/exe/xex (Atari 800)\n"
 152                 "  -i[path]          Directory to search for include files\n"
 153                 "  -l[filename]      Create an output listing file\n"
 154                 "  -l*[filename]     Create an output listing file without pagination\n"
 155                 "  -m[cpu]           Select default CPU. Available options:\n"
 156                 "                    68000\n"
 157                 "                    68020\n"
 158                 "                    68030\n"
 159                 "                    68040\n"
 160                 "                    68060\n"
 161                 "                    6502\n"
 162                 "                    tom\n"
 163                 "                    jerry\n"
 164                 "  -n                Don't do things behind your back in RISC assembler\n"
 165                 "  -o file           Output file name\n"
 166                 "  +o[value]         Turn a specific optimisation on\n"
 167                 "                    Available optimisation values and default settings:\n"
 168                 "                    o0: Absolute long adddresses to word        (on)\n"
 169                 "                    o1: move.l #x,dn/an to moveq                (on)\n"
 170                 "                    o2: Word branches to short                  (on)\n"
 171                 "                    o3: Outer displacement 0(an) to (an)        (off)\n"
 172                 "                    o4: lea size(An),An to addq #size,An        (off)\n"
 173                 "                    o5: Absolute long base displacement to word (off)\n"
 174                 "                    o6: Null branches to NOP                    (off)\n"
 175                 "                    o7: clr.l Dx to moveq #0,Dx                 (off)\n"
 176                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy        (off)\n"
 177                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy          (off)\n"
 178                 "  ~o[value]         Turn a specific optimisation off\n"
 179                 "  +oall             Turn all optimisations on\n"
 180                 "  ~oall             Turn all optimisations off\n"
 181                 "  -p                Create an ST .prg (without symbols)\n"
 182                 "  -ps               Create an ST .prg (with symbols)\n"
 183                 "  -px               Create an ST .prg (with exsymbols)\n"
 184                 "                    Forces -fa\n"
 185                 "  -r[size]          Pad segments to boundary size specified\n"
 186                 "                    w: word (2 bytes, default alignment)\n"
 187                 "                    l: long (4 bytes)\n"
 188                 "                    p: phrase (8 bytes)\n"
 189                 "                    d: double phrase (16 bytes)\n"
 190                 "                    q: quad phrase (32 bytes)\n"
 191                 "  -s                Warn about possible short branches\n"
 192                 "                    and applied optimisations\n"
 193                 "  -u                Force referenced and undefined symbols global\n"
 194                 "  -v                Set verbose mode\n"
 195                 "  -x                Turn on debugging mode\n"
 196                 "  -y[pagelen]       Set page line length (default: 61)\n"
 197                 "\n", cmdlnexec);
 198 }
 199
 200
 201 //
 202 // Display version information
 203 //
 204 void DisplayVersion(void)
 205 {
 206         printf("\n"
 207                 " _ __ _ __ ___   __ _  ___ \n"
 208                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 209                 "| |  | | | | | | (_| | (__ \n"
 210                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 211                 "\nReboot's Macro Assembler\n"
 212                 "Copyright (C) 199x Landon Dyer, 2011-2018 Reboot\n"
 213                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 214 }
 215
 216
 217 //
 218 // Parse optimisation options
 219 //
 220 int ParseOptimization(char * optstring)
 221 {
 222         int onoff = 0;
 223
 224         if (*optstring == '+')
 225                 onoff = 1;
 226         else if (*optstring != '~')
 227                 return ERROR;
 228
 229         if ((optstring[2] == 'a' || optstring[2] == 'A')
 230                 && (optstring[3] == 'l' || optstring[3] == 'L')
 231                 && (optstring[4] == 'l' || optstring[4] == 'L'))
 232         {
 233                 memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 234                 return OK;
 235         }
 236         else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 237         {
 238                 int opt_no = atoi(&optstring[2]);
 239
 240                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 241                 {
 242                         optim_flags[opt_no] = onoff;
 243                         return OK;
 244                 }
 245                 else
 246                         return ERROR;
 247         }
 248         else
 249         {
 250                 return ERROR;
 251         }
 252 }
 253
 254
 255 //
 256 // Process command line arguments and do an assembly
 257 //
 258 int Process(int argc, char ** argv)
 259 {
 260         int argno;                                              // Argument number
 261         SYM * sy;                                               // Pointer to a symbol record
 262         char * s;                                               // String pointer
 263         int fd;                                                 // File descriptor
 264         char fnbuf[FNSIZ];                              // Filename buffer
 265         int i;                                                  // Iterator
 266
 267         errcnt = 0;                                             // Initialise error count
 268         listing = 0;                                    // Initialise listing level
 269         list_flag = 0;                                  // Initialise listing flag
 270         verb_flag = perm_verb_flag;             // Initialise verbose flag
 271         as68_flag = 0;                                  // Initialise as68 kludge mode
 272         glob_flag = 0;                                  // Initialise .globl flag
 273         sbra_flag = 0;                                  // Initialise short branch flag
 274         debug = 0;                                              // Initialise debug flag
 275         searchpath = NULL;                              // Initialise search path
 276         objfname = NULL;                                // Initialise object filename
 277         list_fname = NULL;                              // Initialise listing filename
 278         err_fname = NULL;                               // Initialise error filename
 279         obj_format = BSD;                               // Initialise object format
 280         firstfname = NULL;                              // Initialise first filename
 281         err_fd = ERROUT;                                // Initialise error file descriptor
 282         err_flag = 0;                                   // Initialise error flag
 283         rgpu = 0;                                               // Initialise GPU assembly flag
 284         rdsp = 0;                                               // Initialise DSP assembly flag
 285         robjproc = 0;                                   // Initialise OP assembly flag
 286         lsym_flag = 1;                                  // Include local symbols in object file
 287         regbank = BANK_N;                               // No RISC register bank specified
 288         orgactive = 0;                                  // Not in RISC org section
 289         orgwarning = 0;                                 // No ORG warning issued
 290         segpadsize = 2;                                 // Initialise segment padding size
 291         m6502 = 0;                                              // 6502 mode off by default
 292
 293         // Initialise modules
 294         InitSymbolTable();                              // Symbol table
 295         InitTokenizer();                                // Tokenizer
 296         InitLineProcessor();                    // Line processor
 297         InitExpression();                               // Expression analyzer
 298         InitSection();                                  // Section manager / code generator
 299         InitMark();                                             // Mark tape-recorder
 300         InitMacro();                                    // Macro processor
 301         InitListing();                                  // Listing generator
 302         Init6502();                                             // 6502 assembler
 303
 304         // Process command line arguments and assemble source files
 305         for(argno=0; argno<argc; argno++)
 306         {
 307                 if (*argv[argno] == '-')
 308                 {
 309                         switch (argv[argno][1])
 310                         {
 311                         case 'd':                               // Define symbol
 312                         case 'D':
 313                                 for(s=argv[argno]+2; *s!=EOS;)
 314                                 {
 315                                         if (*s++ == '=')
 316                                         {
 317                                                 s[-1] = EOS;
 318                                                 break;
 319                                         }
 320                                 }
 321
 322                                 if (argv[argno][2] == EOS)
 323                                 {
 324                                         printf("-d: empty symbol\n");
 325                                         errcnt++;
 326                                         return errcnt;
 327                                 }
 328
 329                                 sy = lookup(argv[argno] + 2, 0, 0);
 330
 331                                 if (sy == NULL)
 332                                 {
 333                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 334                                         sy->svalue = 0;
 335                                 }
 336
 337                                 sy->sattr = DEFINED | EQUATED | ABS;
 338                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 339                                 break;
 340                         case 'e':                               // Redirect error message output
 341                         case 'E':
 342                                 err_fname = argv[argno] + 2;
 343                                 break;
 344                         case 'f':                               // -f<format>
 345                         case 'F':
 346                                 switch (argv[argno][2])
 347                                 {
 348                                 case EOS:
 349                                 case 'a':                       // -fa = Alcyon [the default]
 350                                 case 'A':
 351                                         obj_format = ALCYON;
 352                                         break;
 353                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 354                                 case 'B':
 355                                         obj_format = BSD;
 356                                         break;
 357                                 case 'e':                       // -fe = ELF
 358                                 case 'E':
 359                                         obj_format = ELF;
 360                                         break;
 361                                 case 'x':                       // -fx = COM/EXE/XEX
 362                                 case 'X':
 363                                         obj_format = XEX;
 364                                         break;
 365                                 default:
 366                                         printf("-f: unknown object format specified\n");
 367                                         errcnt++;
 368                                         return errcnt;
 369                                 }
 370                                 break;
 371                         case 'g':                               // Debugging flag
 372                         case 'G':
 373                                 printf("Debugging flag (-g) not yet implemented\n");
 374                                 break;
 375                         case 'i':                               // Set directory search path
 376                         case 'I':
 377                                 searchpath = argv[argno] + 2;
 378                                 break;
 379                         case 'l':                               // Produce listing file
 380                         case 'L':
 381                                 if (*(argv[argno] + 2) == '*')
 382                                 {
 383                                         list_fname = argv[argno] + 3;
 384                                         list_pag = 0;    // Special case - turn off pagination
 385                                 }
 386                                 else
 387                                 {
 388                                         list_fname = argv[argno] + 2;
 389                                 }
 390
 391                                 listing = 1;
 392                                 list_flag = 1;
 393                                 lnsave++;
 394                                 break;
 395                         case 'm':
 396                         case 'M':
 397                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 398                                         d_68000();
 399                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 400                                         d_68020();
 401                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 402                                         d_68030();
 403                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 404                                         d_68040();
 405                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 406                                         d_68060();
 407                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 408                                         d_68881();
 409                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 410                                         d_68882();
 411                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 412                                         d_56001();
 413                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 414                                         d_6502();
 415                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 416                                         d_gpu();
 417                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 418                                         d_dsp();
 419                                 else
 420                                 {
 421                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 422                                         errcnt++;
 423                                         return errcnt;
 424                                 }
 425                                 break;
 426                         case 'o':                               // Direct object file output
 427                         case 'O':
 428                                 if (argv[argno][2] != EOS)
 429                                         objfname = argv[argno] + 2;
 430                                 else
 431                                 {
 432                                         if (++argno >= argc)
 433                                         {
 434                                                 printf("Missing argument to -o");
 435                                                 errcnt++;
 436                                                 return errcnt;
 437                                         }
 438
 439                                         objfname = argv[argno];
 440                                 }
 441
 442                                 break;
 443                         case 'p':               /* -p: generate ".PRG" executable output */
 444                         case 'P':
 445                                 /*
 446                                  * -p           .PRG generation w/o symbols
 447                                  * -ps          .PRG generation with symbols
 448                                  * -px          .PRG generation with extended symbols
 449                                  */
 450                                 switch (argv[argno][2])
 451                                 {
 452                                         case EOS:
 453                                                 prg_flag = 1;
 454                                                 break;
 455
 456                                         case 's':
 457                                         case 'S':
 458                                                 prg_flag = 2;
 459                                                 break;
 460
 461                                         case 'x':
 462                                         case 'X':
 463                                                 prg_flag = 3;
 464                                                 break;
 465
 466                                         default:
 467                                                 printf("-p: syntax error\n");
 468                                                 errcnt++;
 469                                                 return errcnt;
 470                                 }
 471
 472                                 // Enforce Alcyon object format - kind of silly
 473                                 // to ask for .prg output without it!
 474                                 obj_format = ALCYON;
 475                                 break;
 476                         case 'r':                               // Pad seg to requested boundary size
 477                         case 'R':
 478                                 switch(argv[argno][2])
 479                                 {
 480                                 case 'w': case 'W': segpadsize = 2;  break;
 481                                 case 'l': case 'L': segpadsize = 4;  break;
 482                                 case 'p': case 'P': segpadsize = 8;  break;
 483                                 case 'd': case 'D': segpadsize = 16; break;
 484                                 case 'q': case 'Q': segpadsize = 32; break;
 485                                 default: segpadsize = 2; break; // Effective autoeven();
 486                                 }
 487                                 break;
 488                         case 's':                               // Warn about possible short branches
 489                         case 'S':
 490                                 sbra_flag = 1;
 491                                 break;
 492                         case 'u':                               // Make undefined symbols .globl
 493                         case 'U':
 494                                 glob_flag = 1;
 495                                 break;
 496                         case 'v':                               // Verbose flag
 497                         case 'V':
 498                                 verb_flag++;
 499
 500                                 if (verb_flag > 1)
 501                                         DisplayVersion();
 502
 503                                 break;
 504                         case 'x':                               // Turn on debugging
 505                         case 'X':
 506                                 debug = 1;
 507                                 printf("~ Debugging ON\n");
 508                                 break;
 509                         case 'y':                               // -y<pagelen>
 510                         case 'Y':
 511                                 pagelen = atoi(argv[argno] + 2);
 512
 513                                 if (pagelen < 10)
 514                                 {
 515                                         printf("-y: bad page length\n");
 516                                         errcnt++;
 517                                         return errcnt;
 518                                 }
 519
 520                                 break;
 521                         case EOS:                               // Input is stdin
 522                                 if (firstfname == NULL) // Kludge first filename
 523                                         firstfname = defname;
 524
 525                                 include(0, "(stdin)");
 526                                 Assemble();
 527                                 break;
 528                         case 'h':                               // Display command line usage
 529                         case 'H':
 530                         case '?':
 531                                 DisplayVersion();
 532                                 DisplayHelp();
 533                                 errcnt++;
 534                                 break;
 535                         case 'n':                               // Turn off legacy mode
 536                         case 'N':
 537                                 legacy_flag = 0;
 538                                 printf("Legacy mode OFF\n");
 539                                 break;
 540                         default:
 541                                 DisplayVersion();
 542                                 printf("Unknown switch: %s\n\n", argv[argno]);
 543                                 DisplayHelp();
 544                                 errcnt++;
 545                                 break;
 546                         }
 547                 }
 548                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 549                 {
 550                         if (ParseOptimization(argv[argno]) != OK)
 551                         {
 552                                 DisplayVersion();
 553                                 printf("Unknown switch: %s\n\n", argv[argno]);
 554                                 DisplayHelp();
 555                                 errcnt++;
 556                                 break;
 557                         }
 558                 }
 559                 else
 560                 {
 561                         // Record first filename.
 562                         if (firstfname == NULL)
 563                                 firstfname = argv[argno];
 564
 565                         strcpy(fnbuf, argv[argno]);
 566                         fext(fnbuf, ".s", 0);
 567                         fd = open(fnbuf, 0);
 568
 569                         if (fd < 0)
 570                         {
 571                                 printf("Cannot open: %s\n", fnbuf);
 572                                 errcnt++;
 573                                 continue;
 574                         }
 575
 576                         include(fd, fnbuf);
 577                         Assemble();
 578                 }
 579         }
 580
 581         // Wind-up processing;
 582         // o  save current section (no more code generation)
 583         // o  do auto-even of all sections (or boundary alignment as requested
 584         //    through '-r')
 585     // o  save the last pc value for 6502 (if we used 6502 at all) and
 586     //    detemine if the last section contains anything
 587         // o  determine name of object file:
 588         //    -  "foo.o" for linkable output;
 589         //    -  "foo.prg" for GEMDOS executable (-p flag).
 590         SaveSection();
 591
 592         for(i=TEXT; i<=BSS; i<<=1)
 593         {
 594                 SwitchSection(i);
 595
 596                 switch(segpadsize)
 597                 {
 598                 case 2:  d_even();    break;
 599                 case 4:  d_long();    break;
 600                 case 8:  d_phrase();  break;
 601                 case 16: d_dphrase(); break;
 602                 case 32: d_qphrase(); break;
 603                 }
 604
 605                 SaveSection();
 606         }
 607
 608         SwitchSection(M6502);
 609
 610         if (sloc != currentorg[0])
 611         {
 612                 currentorg[1] = sloc;
 613                 currentorg += 2;
 614         }
 615
 616         if (objfname == NULL)
 617         {
 618                 if (firstfname == NULL)
 619                         firstfname = defname;
 620
 621                 strcpy(fnbuf, firstfname);
 622                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 623                 objfname = fnbuf;
 624         }
 625
 626         // With one pass finished, go back and:
 627         // (1)   run through all the fixups and resolve forward references;
 628         // (1.5) ensure that remaining fixups can be handled by the linker
 629         //       (`lo68' format, extended (postfix) format....)
 630         // (2)   generate the output file image and symbol table;
 631         // (3)   generate relocation information from left-over fixups.
 632         ResolveAllFixups();                                             // Do all fixups
 633         StopMark();                                                             // Stop mark tape-recorder
 634
 635         if (errcnt == 0)
 636         {
 637                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 638                         cantcreat(objfname);
 639
 640                 if (verb_flag)
 641                 {
 642                         s = (prg_flag ? "executable" : "object");
 643                         printf("[Writing %s file: %s]\n", s, objfname);
 644                 }
 645
 646                 WriteObject(fd);
 647                 close(fd);
 648
 649                 if (errcnt != 0)
 650                         unlink(objfname);
 651         }
 652
 653         if (list_flag)
 654         {
 655                 if (verb_flag)
 656                         printf("[Wrapping-up listing file]\n");
 657
 658                 listing = 1;
 659                 symtable();
 660                 close(list_fd);
 661         }
 662
 663         if (err_flag)
 664                 close(err_fd);
 665
 666         DEBUG dump_everything();
 667
 668         return errcnt;
 669 }
 670
 671
 672 //
 673 // Determine processor endianess
 674 //
 675 int GetEndianess(void)
 676 {
 677         int i = 1;
 678         char * p = (char *)&i;
 679
 680         if (p[0] == 1)
 681                 return 0;
 682
 683         return 1;
 684 }
 685
 686
 687 //
 688 // Application entry point
 689 //
 690 int main(int argc, char ** argv)
 691 {
 692         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 693         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 694
 695         // Set legacy optimisation flags to on and everything else to off
 696         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 697         optim_flags[OPT_ABS_SHORT] =
 698                 optim_flags[OPT_MOVEL_MOVEQ] =
 699                 optim_flags[OPT_BSR_BCC_S] = 1;
 700
 701         cmdlnexec = argv[0];                    // Obtain executable name
 702         endian = GetEndianess();                // Get processor endianess
 703
 704         // If commands were passed in, process them
 705         if (argc > 1)
 706                 return Process(argc - 1, argv + 1);
 707
 708         DisplayVersion();
 709         DisplayHelp();
 710
 711         return 0;
 712 }
 713