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, 2011-2019 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 "dsp56k.h"
  14 #include "error.h"
  15 #include "expr.h"
  16 #include "listing.h"
  17 #include "mark.h"
  18 #include "macro.h"
  19 #include "object.h"
  20 #include "procln.h"
  21 #include "riscasm.h"
  22 #include "sect.h"
  23 #include "symbol.h"
  24 #include "token.h"
  25 #include "version.h"
  26
  27 int perm_verb_flag;                             // Permanently verbose, interactive mode
  28 int list_flag;                                  // "-l" listing flag on command line
  29 int list_pag = 1;                               // Enable listing pagination by default
  30 int verb_flag;                                  // Be verbose about what's going on
  31 int m6502;                                              // 1, assembling 6502 code
  32 int as68_flag;                                  // as68 kludge mode
  33 int glob_flag;                                  // Assume undefined symbols are global
  34 int lsym_flag;                                  // Include local symbols in object file
  35 int sbra_flag;                                  // Warn about possible short branches
  36 int prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
  37 int prg_extend;                                 // !=0, output extended .PRG symbols
  38 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  39 int obj_format;                                 // Object format flag
  40 int debug;                                              // [1..9] Enable debugging levels
  41 int err_flag;                                   // '-e' specified
  42 int err_fd;                                             // File to write error messages to
  43 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  44 int robjproc;                                   // Assembling Jaguar Object Processor code
  45 int dsp56001;                                   // Assembling DSP 56001 code
  46 int list_fd;                                    // File to write listing to
  47 int regbank;                                    // RISC register bank
  48 int segpadsize;                                 // Segment padding size
  49 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  50 char * objfname;                                // Object filename pointer
  51 char * firstfname;                              // First source filename
  52 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  53 char * searchpath;                              // Search path for include files
  54 char defname[] = "noname.o";    // Default output filename
  55 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  56 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  57 int activefpu = FPU_NONE;               // Active FPU (none by default)
  58
  59
  60 //
  61 // Convert a string to uppercase
  62 //
  63 void strtoupper(char * s)
  64 {
  65         while (*s)
  66                 *s++ &= 0xDF;
  67 }
  68
  69
  70 //
  71 // Manipulate file extension.
  72 //
  73 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  74 // nonzero, any old extension is removed. If the file does not already have an
  75 // extension, 'extension' is appended to the filename.
  76 //
  77 char * fext(char * name, char * extension, int stripp)
  78 {
  79         char * s;
  80
  81         // Find beginning of "real" name (strip off path)
  82         char * beg = strrchr(name, SLASHCHAR);
  83
  84         if (beg == NULL)
  85                 beg = name;
  86
  87         // Clobber any old extension, if requested
  88         if (stripp)
  89         {
  90                 for(s=beg; *s && *s!='.'; ++s)
  91                         ;
  92
  93                 *s = '\0';
  94         }
  95
  96         if (strrchr(beg, '.') == NULL)
  97                 strcat(beg, extension);
  98
  99         return name;
 100 }
 101
 102
 103 //
 104 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 105 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 106 // nth path doesn't exist.
 107 //
 108 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 109 //
 110 int nthpath(char * env_var, int itemno, char * buf)
 111 {
 112         char * s = searchpath;
 113
 114         if (s == NULL)
 115                 s = getenv(env_var);
 116
 117         if (s == NULL)
 118                 return 0;
 119
 120         while (itemno--)
 121                 while (*s != EOS && *s++ != ';')
 122                         ;
 123
 124         if (*s == EOS)
 125                 return 0;
 126
 127         while (*s != EOS && *s != ';')
 128                 *buf++ = *s++;
 129
 130         *buf++ = EOS;
 131
 132         return 1;
 133 }
 134
 135
 136 //
 137 // Display command line help
 138 //
 139 void DisplayHelp(void)
 140 {
 141         printf("Usage:\n"
 142                 "    %s [options] srcfile\n"
 143                 "\n"
 144                 "Options:\n"
 145                 "  -? or -h          Display usage information\n"
 146                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 147                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 148                 "  -f[format]        Output object file format\n"
 149                 "                    a: ALCYON (use this for ST)\n"
 150                 "                    b: BSD (use this for Jaguar)\n"
 151                 "                    e: ELF\n"
 152                 "                    p: P56 (use this for DSP56001 only)\n"
 153                 "                    l: LOD (use this for DSP56001 only)\n"
 154                 "                    x: com/exe/xex (Atari 800)\n"
 155                 "  -i[path]          Directory to search for include files\n"
 156                 "  -l[filename]      Create an output listing file\n"
 157                 "  -l*[filename]     Create an output listing file without pagination\n"
 158                 "  -m[cpu]           Select default CPU. Available options:\n"
 159                 "                    68000\n"
 160                 "                    68020\n"
 161                 "                    68030\n"
 162                 "                    68040\n"
 163                 "                    68060\n"
 164                 "                    6502\n"
 165                 "                    tom\n"
 166                 "                    jerry\n"
 167                 "                    56001\n"
 168                 "  -n                Don't do things behind your back in RISC assembler\n"
 169                 "  -o file           Output file name\n"
 170                 "  +o[value]         Turn a specific optimisation on\n"
 171                 "                    Available optimisation values and default settings:\n"
 172                 "                    o0: Absolute long adddresses to word        (on)\n"
 173                 "                    o1: move.l #x,dn/an to moveq                (on)\n"
 174                 "                    o2: Word branches to short                  (on)\n"
 175                 "                    o3: Outer displacement 0(an) to (an)        (off)\n"
 176                 "                    o4: lea size(An),An to addq #size,An        (off)\n"
 177                 "                    o5: Absolute long base displacement to word (off)\n"
 178                 "                    o6: Null branches to NOP                    (off)\n"
 179                 "                    o7: clr.l Dx to moveq #0,Dx                 (off)\n"
 180                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy        (off)\n"
 181                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy          (off)\n"
 182                 "  ~o[value]         Turn a specific optimisation off\n"
 183                 "  +oall             Turn all optimisations on\n"
 184                 "  ~oall             Turn all optimisations off\n"
 185                 "  -p                Create an ST .prg (without symbols)\n"
 186                 "  -ps               Create an ST .prg (with symbols)\n"
 187                 "  -px               Create an ST .prg (with exsymbols)\n"
 188                 "                    Forces -fa\n"
 189                 "  -r[size]          Pad segments to boundary size specified\n"
 190                 "                    w: word (2 bytes, default alignment)\n"
 191                 "                    l: long (4 bytes)\n"
 192                 "                    p: phrase (8 bytes)\n"
 193                 "                    d: double phrase (16 bytes)\n"
 194                 "                    q: quad phrase (32 bytes)\n"
 195                 "  -s                Warn about possible short branches\n"
 196                 "                    and applied optimisations\n"
 197                 "  -u                Force referenced and undefined symbols global\n"
 198                 "  -v                Set verbose mode\n"
 199                 "  -x                Turn on debugging mode\n"
 200                 "  -y[pagelen]       Set page line length (default: 61)\n"
 201                 "\n", cmdlnexec);
 202 }
 203
 204
 205 //
 206 // Display version information
 207 //
 208 void DisplayVersion(void)
 209 {
 210         printf("\n"
 211                 " _ __ _ __ ___   __ _  ___ \n"
 212                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 213                 "| |  | | | | | | (_| | (__ \n"
 214                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 215                 "\nReboot's Macro Assembler\n"
 216                 "Copyright (C) 199x Landon Dyer, 2011-2019 Reboot\n"
 217                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 218 }
 219
 220
 221 //
 222 // Parse optimisation options
 223 //
 224 int ParseOptimization(char * optstring)
 225 {
 226         int onoff = 0;
 227
 228         if (*optstring == '+')
 229                 onoff = 1;
 230         else if (*optstring != '~')
 231                 return ERROR;
 232
 233         if ((optstring[2] == 'a' || optstring[2] == 'A')
 234                 && (optstring[3] == 'l' || optstring[3] == 'L')
 235                 && (optstring[4] == 'l' || optstring[4] == 'L'))
 236         {
 237                 memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 238                 return OK;
 239         }
 240         else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 241         {
 242                 int opt_no = atoi(&optstring[2]);
 243
 244                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 245                 {
 246                         optim_flags[opt_no] = onoff;
 247                         return OK;
 248                 }
 249                 else
 250                         return ERROR;
 251         }
 252         else
 253         {
 254                 return ERROR;
 255         }
 256 }
 257
 258
 259 //
 260 // Process command line arguments and do an assembly
 261 //
 262 int Process(int argc, char ** argv)
 263 {
 264         int argno;                                              // Argument number
 265         SYM * sy;                                               // Pointer to a symbol record
 266         char * s;                                               // String pointer
 267         int fd;                                                 // File descriptor
 268         char fnbuf[FNSIZ];                              // Filename buffer
 269         int i;                                                  // Iterator
 270
 271         errcnt = 0;                                             // Initialise error count
 272         listing = 0;                                    // Initialise listing level
 273         list_flag = 0;                                  // Initialise listing flag
 274         verb_flag = perm_verb_flag;             // Initialise verbose flag
 275         as68_flag = 0;                                  // Initialise as68 kludge mode
 276         glob_flag = 0;                                  // Initialise .globl flag
 277         sbra_flag = 0;                                  // Initialise short branch flag
 278         debug = 0;                                              // Initialise debug flag
 279         searchpath = NULL;                              // Initialise search path
 280         objfname = NULL;                                // Initialise object filename
 281         list_fname = NULL;                              // Initialise listing filename
 282         err_fname = NULL;                               // Initialise error filename
 283         obj_format = BSD;                               // Initialise object format
 284         firstfname = NULL;                              // Initialise first filename
 285         err_fd = ERROUT;                                // Initialise error file descriptor
 286         err_flag = 0;                                   // Initialise error flag
 287         rgpu = 0;                                               // Initialise GPU assembly flag
 288         rdsp = 0;                                               // Initialise DSP assembly flag
 289         robjproc = 0;                                   // Initialise OP assembly flag
 290         lsym_flag = 1;                                  // Include local symbols in object file
 291         regbank = BANK_N;                               // No RISC register bank specified
 292         orgactive = 0;                                  // Not in RISC org section
 293         orgwarning = 0;                                 // No ORG warning issued
 294         segpadsize = 2;                                 // Initialise segment padding size
 295         m6502 = 0;                                              // 6502 mode off by default
 296
 297         // Initialise modules
 298         InitSymbolTable();                              // Symbol table
 299         InitTokenizer();                                // Tokenizer
 300         InitLineProcessor();                    // Line processor
 301         InitExpression();                               // Expression analyzer
 302         InitSection();                                  // Section manager / code generator
 303         InitMark();                                             // Mark tape-recorder
 304         InitMacro();                                    // Macro processor
 305         InitListing();                                  // Listing generator
 306         Init6502();                                             // 6502 assembler
 307
 308         // Process command line arguments and assemble source files
 309         for(argno=0; argno<argc; argno++)
 310         {
 311                 if (*argv[argno] == '-')
 312                 {
 313                         switch (argv[argno][1])
 314                         {
 315                         case 'd':                               // Define symbol
 316                         case 'D':
 317                                 for(s=argv[argno]+2; *s!=EOS;)
 318                                 {
 319                                         if (*s++ == '=')
 320                                         {
 321                                                 s[-1] = EOS;
 322                                                 break;
 323                                         }
 324                                 }
 325
 326                                 if (argv[argno][2] == EOS)
 327                                 {
 328                                         printf("-d: empty symbol\n");
 329                                         errcnt++;
 330                                         return errcnt;
 331                                 }
 332
 333                                 sy = lookup(argv[argno] + 2, 0, 0);
 334
 335                                 if (sy == NULL)
 336                                 {
 337                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 338                                         sy->svalue = 0;
 339                                 }
 340
 341                                 sy->sattr = DEFINED | EQUATED | ABS;
 342                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 343                                 break;
 344                         case 'e':                               // Redirect error message output
 345                         case 'E':
 346                                 err_fname = argv[argno] + 2;
 347                                 break;
 348                         case 'f':                               // -f<format>
 349                         case 'F':
 350                                 switch (argv[argno][2])
 351                                 {
 352                                 case EOS:
 353                                 case 'a':                       // -fa = Alcyon [the default]
 354                                 case 'A':
 355                                         obj_format = ALCYON;
 356                                         break;
 357                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 358                                 case 'B':
 359                                         obj_format = BSD;
 360                                         break;
 361                                 case 'e':                       // -fe = ELF
 362                                 case 'E':
 363                                         obj_format = ELF;
 364                                         break;
 365                 case 'l':           // -fl = LOD
 366                 case 'L':
 367                     obj_format = LOD;
 368                     break;
 369                 case 'p':           // -fp = P56
 370                 case 'P':
 371                     obj_format = P56;
 372                                         break;
 373                                 case 'x':                       // -fx = COM/EXE/XEX
 374                                 case 'X':
 375                                         obj_format = XEX;
 376                                         break;
 377                                 default:
 378                                         printf("-f: unknown object format specified\n");
 379                                         errcnt++;
 380                                         return errcnt;
 381                                 }
 382                                 break;
 383                         case 'g':                               // Debugging flag
 384                         case 'G':
 385                                 printf("Debugging flag (-g) not yet implemented\n");
 386                                 break;
 387                         case 'i':                               // Set directory search path
 388                         case 'I':
 389                                 searchpath = argv[argno] + 2;
 390                                 break;
 391                         case 'l':                               // Produce listing file
 392                         case 'L':
 393                                 if (*(argv[argno] + 2) == '*')
 394                                 {
 395                                         list_fname = argv[argno] + 3;
 396                                         list_pag = 0;    // Special case - turn off pagination
 397                                 }
 398                                 else
 399                                 {
 400                                         list_fname = argv[argno] + 2;
 401                                 }
 402
 403                                 listing = 1;
 404                                 list_flag = 1;
 405                                 lnsave++;
 406                                 break;
 407                         case 'm':
 408                         case 'M':
 409                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 410                                         d_68000();
 411                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 412                                         d_68020();
 413                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 414                                         d_68030();
 415                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 416                                         d_68040();
 417                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 418                                         d_68060();
 419                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 420                                         d_68881();
 421                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 422                                         d_68882();
 423                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 424                                         d_56001();
 425                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 426                                         d_6502();
 427                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 428                                         d_gpu();
 429                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 430                                         d_dsp();
 431                                 else
 432                                 {
 433                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 434                                         errcnt++;
 435                                         return errcnt;
 436                                 }
 437                                 break;
 438                         case 'o':                               // Direct object file output
 439                         case 'O':
 440                                 if (argv[argno][2] != EOS)
 441                                         objfname = argv[argno] + 2;
 442                                 else
 443                                 {
 444                                         if (++argno >= argc)
 445                                         {
 446                                                 printf("Missing argument to -o");
 447                                                 errcnt++;
 448                                                 return errcnt;
 449                                         }
 450
 451                                         objfname = argv[argno];
 452                                 }
 453
 454                                 break;
 455                         case 'p':               /* -p: generate ".PRG" executable output */
 456                         case 'P':
 457                                 /*
 458                                  * -p           .PRG generation w/o symbols
 459                                  * -ps          .PRG generation with symbols
 460                                  * -px          .PRG generation with extended symbols
 461                                  */
 462                                 switch (argv[argno][2])
 463                                 {
 464                                         case EOS:
 465                                                 prg_flag = 1;
 466                                                 break;
 467
 468                                         case 's':
 469                                         case 'S':
 470                                                 prg_flag = 2;
 471                                                 break;
 472
 473                                         case 'x':
 474                                         case 'X':
 475                                                 prg_flag = 3;
 476                                                 break;
 477
 478                                         default:
 479                                                 printf("-p: syntax error\n");
 480                                                 errcnt++;
 481                                                 return errcnt;
 482                                 }
 483
 484                                 // Enforce Alcyon object format - kind of silly
 485                                 // to ask for .prg output without it!
 486                                 obj_format = ALCYON;
 487                                 break;
 488                         case 'r':                               // Pad seg to requested boundary size
 489                         case 'R':
 490                                 switch(argv[argno][2])
 491                                 {
 492                                 case 'w': case 'W': segpadsize = 2;  break;
 493                                 case 'l': case 'L': segpadsize = 4;  break;
 494                                 case 'p': case 'P': segpadsize = 8;  break;
 495                                 case 'd': case 'D': segpadsize = 16; break;
 496                                 case 'q': case 'Q': segpadsize = 32; break;
 497                                 default: segpadsize = 2; break; // Effective autoeven();
 498                                 }
 499                                 break;
 500                         case 's':                               // Warn about possible short branches
 501                         case 'S':
 502                                 sbra_flag = 1;
 503                                 break;
 504                         case 'u':                               // Make undefined symbols .globl
 505                         case 'U':
 506                                 glob_flag = 1;
 507                                 break;
 508                         case 'v':                               // Verbose flag
 509                         case 'V':
 510                                 verb_flag++;
 511
 512                                 if (verb_flag > 1)
 513                                         DisplayVersion();
 514
 515                                 break;
 516                         case 'x':                               // Turn on debugging
 517                         case 'X':
 518                                 debug = 1;
 519                                 printf("~ Debugging ON\n");
 520                                 break;
 521                         case 'y':                               // -y<pagelen>
 522                         case 'Y':
 523                                 pagelen = atoi(argv[argno] + 2);
 524
 525                                 if (pagelen < 10)
 526                                 {
 527                                         printf("-y: bad page length\n");
 528                                         errcnt++;
 529                                         return errcnt;
 530                                 }
 531
 532                                 break;
 533                         case EOS:                               // Input is stdin
 534                                 if (firstfname == NULL) // Kludge first filename
 535                                         firstfname = defname;
 536
 537                                 include(0, "(stdin)");
 538                                 Assemble();
 539                                 break;
 540                         case 'h':                               // Display command line usage
 541                         case 'H':
 542                         case '?':
 543                                 DisplayVersion();
 544                                 DisplayHelp();
 545                                 errcnt++;
 546                                 break;
 547                         case 'n':                               // Turn off legacy mode
 548                         case 'N':
 549                                 legacy_flag = 0;
 550                                 printf("Legacy mode OFF\n");
 551                                 break;
 552                         default:
 553                                 DisplayVersion();
 554                                 printf("Unknown switch: %s\n\n", argv[argno]);
 555                                 DisplayHelp();
 556                                 errcnt++;
 557                                 break;
 558                         }
 559                 }
 560                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 561                 {
 562                         if (ParseOptimization(argv[argno]) != OK)
 563                         {
 564                                 DisplayVersion();
 565                                 printf("Unknown switch: %s\n\n", argv[argno]);
 566                                 DisplayHelp();
 567                                 errcnt++;
 568                                 break;
 569                         }
 570                 }
 571                 else
 572                 {
 573                         // Record first filename.
 574                         if (firstfname == NULL)
 575                                 firstfname = argv[argno];
 576
 577                         strcpy(fnbuf, argv[argno]);
 578                         fext(fnbuf, ".s", 0);
 579                         fd = open(fnbuf, 0);
 580
 581                         if (fd < 0)
 582                         {
 583                                 printf("Cannot open: %s\n", fnbuf);
 584                                 errcnt++;
 585                                 continue;
 586                         }
 587
 588                         include(fd, fnbuf);
 589                         Assemble();
 590                 }
 591         }
 592
 593         // Wind-up processing;
 594         // o  save current section (no more code generation)
 595         // o  do auto-even of all sections (or boundary alignment as requested
 596         //    through '-r')
 597     // o  save the last pc value for 6502 (if we used 6502 at all) and
 598     //    detemine if the last section contains anything
 599         // o  determine name of object file:
 600         //    -  "foo.o" for linkable output;
 601         //    -  "foo.prg" for GEMDOS executable (-p flag).
 602         SaveSection();
 603         int temp_section = cursect;
 604
 605         for(i=TEXT; i<=BSS; i<<=1)
 606         {
 607                 SwitchSection(i);
 608
 609                 switch(segpadsize)
 610                 {
 611                 case 2:  d_even();    break;
 612                 case 4:  d_long();    break;
 613                 case 8:  d_phrase();  break;
 614                 case 16: d_dphrase(); break;
 615                 case 32: d_qphrase(); break;
 616                 }
 617
 618                 SaveSection();
 619         }
 620
 621         SwitchSection(M6502);
 622
 623         if (sloc != currentorg[0])
 624         {
 625                 currentorg[1] = sloc;
 626                 currentorg += 2;
 627         }
 628
 629         // This looks like an awful kludge...  !!! FIX !!!
 630         if (temp_section & (M56001P | M56001X | M56001Y))
 631         {
 632                 SwitchSection(temp_section);
 633
 634                 if (chptr != dsp_currentorg->start)
 635                 {
 636                         dsp_currentorg->end = chptr;
 637                         dsp_currentorg++;
 638                 }
 639         }
 640
 641         SwitchSection(TEXT);
 642
 643         if (objfname == NULL)
 644         {
 645                 if (firstfname == NULL)
 646                         firstfname = defname;
 647
 648                 strcpy(fnbuf, firstfname);
 649                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 650                 objfname = fnbuf;
 651         }
 652
 653         // With one pass finished, go back and:
 654         // (1)   run through all the fixups and resolve forward references;
 655         // (1.5) ensure that remaining fixups can be handled by the linker
 656         //       (`lo68' format, extended (postfix) format....)
 657         // (2)   generate the output file image and symbol table;
 658         // (3)   generate relocation information from left-over fixups.
 659         ResolveAllFixups();                                             // Do all fixups
 660         StopMark();                                                             // Stop mark tape-recorder
 661
 662         if (errcnt == 0)
 663         {
 664                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 665                         CantCreateFile(objfname);
 666
 667                 if (verb_flag)
 668                 {
 669                         s = (prg_flag ? "executable" : "object");
 670                         printf("[Writing %s file: %s]\n", s, objfname);
 671                 }
 672
 673                 WriteObject(fd);
 674                 close(fd);
 675
 676                 if (errcnt != 0)
 677                         unlink(objfname);
 678         }
 679
 680         if (list_flag)
 681         {
 682                 if (verb_flag)
 683                         printf("[Wrapping-up listing file]\n");
 684
 685                 listing = 1;
 686                 symtable();
 687                 close(list_fd);
 688         }
 689
 690         if (err_flag)
 691                 close(err_fd);
 692
 693         DEBUG dump_everything();
 694
 695         return errcnt;
 696 }
 697
 698
 699 //
 700 // Determine processor endianess
 701 //
 702 int GetEndianess(void)
 703 {
 704         int i = 1;
 705         char * p = (char *)&i;
 706
 707         if (p[0] == 1)
 708                 return 0;
 709
 710         return 1;
 711 }
 712
 713
 714 //
 715 // Application entry point
 716 //
 717 int main(int argc, char ** argv)
 718 {
 719         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 720         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 721
 722         // Set legacy optimisation flags to on and everything else to off
 723         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 724         optim_flags[OPT_ABS_SHORT] =
 725                 optim_flags[OPT_MOVEL_MOVEQ] =
 726                 optim_flags[OPT_BSR_BCC_S] = 1;
 727
 728         cmdlnexec = argv[0];                    // Obtain executable name
 729         endian = GetEndianess();                // Get processor endianess
 730
 731         // If commands were passed in, process them
 732         if (argc > 1)
 733                 return Process(argc - 1, argv + 1);
 734
 735         DisplayVersion();
 736         DisplayHelp();
 737
 738         return 0;
 739 }
 740