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, 2011-2020 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 optim_warn_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 = NULL;               // 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 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  59 uint32_t org68k_address;                // .org for 68k
  60
  61 //
  62 // Convert a string to uppercase
  63 //
  64 void strtoupper(char * s)
  65 {
  66         while (*s)
  67                 *s++ &= 0xDF;
  68 }
  69
  70
  71 //
  72 // Manipulate file extension.
  73 //
  74 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  75 // nonzero, any old extension is removed. If the file does not already have an
  76 // extension, 'extension' is appended to the filename.
  77 //
  78 char * fext(char * name, char * extension, int stripp)
  79 {
  80         char * s;
  81
  82         // Find beginning of "real" name (strip off path)
  83         char * beg = strrchr(name, SLASHCHAR);
  84
  85         if (beg == NULL)
  86                 beg = name;
  87
  88         // Clobber any old extension, if requested
  89         if (stripp)
  90         {
  91                 for(s=beg; *s && *s!='.'; ++s)
  92                         ;
  93
  94                 *s = '\0';
  95         }
  96
  97         if (strrchr(beg, '.') == NULL)
  98                 strcat(beg, extension);
  99
 100         return name;
 101 }
 102
 103
 104 //
 105 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 106 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 107 // nth path doesn't exist.
 108 //
 109 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 110 //
 111 int nthpath(char * env_var, int itemno, char * buf)
 112 {
 113         char * s = searchpath;
 114
 115         if (s == NULL)
 116                 s = getenv(env_var);
 117
 118         if (s == NULL)
 119                 return 0;
 120
 121         while (itemno--)
 122                 while (*s != EOS && *s++ != ';')
 123                         ;
 124
 125         if (*s == EOS)
 126                 return 0;
 127
 128         while (*s != EOS && *s != ';')
 129                 *buf++ = *s++;
 130
 131         *buf++ = EOS;
 132
 133         return 1;
 134 }
 135
 136
 137 //
 138 // Display command line help
 139 //
 140 void DisplayHelp(void)
 141 {
 142         printf("Usage:\n"
 143                 "    %s [options] srcfile\n"
 144                 "\n"
 145                 "Options:\n"
 146                 "  -? or -h          Display usage information\n"
 147                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 148                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 149                 "  -f[format]        Output object file format\n"
 150                 "                    a: ALCYON\n"
 151                 "                    b: BSD (use this for Jaguar)\n"
 152                 "                    e: ELF\n"
 153                 "                    p: P56 (use this for DSP56001 only)\n"
 154                 "                    l: LOD (use this for DSP56001 only)\n"
 155                 "                    x: com/exe/xex (Atari 800)\n"
 156                 "                    r: absolute address\n"
 157                 "  -i[path]          Directory to search for include files\n"
 158                 "  -l[filename]      Create an output listing file\n"
 159                 "  -l*[filename]     Create an output listing file without pagination\n"
 160                 "  -m[cpu]           Select default CPU. Available options:\n"
 161                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 162                 "  -n                Don't do things behind your back in RISC assembler\n"
 163                 "  -o file           Output file name\n"
 164                 "  +o[value]         Turn a specific optimisation on\n"
 165                 "                    Available optimisation values and default settings:\n"
 166                 "                    o0: Absolute long addresses to word                      (on)\n"
 167                 "                    o1: move.l #x,dn/an to moveq                             (on)\n"
 168                 "                    o2: Word branches to short                               (on)\n"
 169                 "                    o3: Outer displacement 0(an) to (an)                     (off)\n"
 170                 "                    o4: lea size(An),An to addq #size,An                     (off)\n"
 171                 "                    o5: 68020+ Absolute long base/outer displacement to word (off)\n"
 172                 "                    o6: Null branches to NOP                                 (off)\n"
 173                 "                    o7: clr.l Dx to moveq #0,Dx                              (off)\n"
 174                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy                     (off)\n"
 175                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy                       (off)\n"
 176                 "                    op: Enforce PC relative                                  (off)\n"
 177                 "  ~o[value]         Turn a specific optimisation off\n"
 178                 "  +oall             Turn all optimisations on\n"
 179                 "  ~oall             Turn all optimisations off\n"
 180                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 181                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 182                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 183                 "  -r[size]          Pad segments to boundary size specified\n"
 184                 "                    w: word (2 bytes, default alignment)\n"
 185                 "                    l: long (4 bytes)\n"
 186                 "                    p: phrase (8 bytes)\n"
 187                 "                    d: double phrase (16 bytes)\n"
 188                 "                    q: quad phrase (32 bytes)\n"
 189                 "  -s                Warn about possible short branches\n"
 190                 "                    and applied optimisations\n"
 191                 "  -u                Force referenced and undefined symbols global\n"
 192                 "  -v                Set verbose mode\n"
 193                 "  -x                Turn on debugging mode\n"
 194                 "  -y[pagelen]       Set page line length (default: 61)\n"
 195                 "\n", cmdlnexec);
 196 }
 197
 198
 199 //
 200 // Display version information
 201 //
 202 void DisplayVersion(void)
 203 {
 204         printf("\n"
 205                 " _ __ _ __ ___   __ _  ___ \n"
 206                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 207                 "| |  | | | | | | (_| | (__ \n"
 208                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 209                 "\nReboot's Macro Assembler\n"
 210                 "Copyright (C) 199x Landon Dyer, 2011-2020 Reboot\n"
 211                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 212 }
 213
 214
 215 //
 216 // Parse optimisation options
 217 //
 218 int ParseOptimization(char * optstring)
 219 {
 220         int onoff = 0;
 221
 222         while (*optstring)
 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                         optstring += 5;
 235                 }
 236                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 237                 {
 238                         if (optstring[2] == 'p' || optstring[2] == 'P')
 239                         {
 240                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 241                                 optstring += 3;
 242                         }
 243                         else
 244                         {
 245                                 int opt_no = atoi(&optstring[2]);
 246                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 247                                 {
 248                                         optim_flags[opt_no] = onoff;
 249                                         optstring += 3;
 250                                         // If opt_no is 2 digits then consume an extra character.
 251                                         // Sounds a bit sleazy but we know we're not going to hit
 252                                         // more than 100 optimisation switches so this should be fine.
 253                                         // If we do hit that number then it'll probably be time to burn
 254                                         // the whole codebase and start from scratch.
 255                                         if (opt_no > 9)
 256                                                 optstring++;
 257                                 }
 258                                 else
 259                                         return ERROR;
 260                         }
 261                 }
 262                 else
 263                 {
 264                         return ERROR;
 265                 }
 266                 if (*optstring == ',')
 267                         optstring++;
 268         }
 269         return OK;
 270 }
 271
 272
 273 //
 274 // Process command line arguments and do an assembly
 275 //
 276 int Process(int argc, char ** argv)
 277 {
 278         int argno;                                              // Argument number
 279         SYM * sy;                                               // Pointer to a symbol record
 280         char * s;                                               // String pointer
 281         int fd;                                                 // File descriptor
 282         char fnbuf[FNSIZ];                              // Filename buffer
 283         int i;                                                  // Iterator
 284
 285         errcnt = 0;                                             // Initialize error count
 286         listing = 0;                                    // Initialize listing level
 287         list_flag = 0;                                  // Initialize listing flag
 288         verb_flag = perm_verb_flag;             // Initialize verbose flag
 289         as68_flag = 0;                                  // Initialize as68 kludge mode
 290         glob_flag = 0;                                  // Initialize .globl flag
 291         optim_warn_flag = 0;                    // Initialize short branch flag
 292         debug = 0;                                              // Initialize debug flag
 293         searchpath = NULL;                              // Initialize search path
 294         objfname = NULL;                                // Initialize object filename
 295         list_fname = NULL;                              // Initialize listing filename
 296         err_fname = NULL;                               // Initialize error filename
 297         obj_format = BSD;                               // Initialize object format
 298         firstfname = NULL;                              // Initialize first filename
 299         err_fd = ERROUT;                                // Initialize error file descriptor
 300         err_flag = 0;                                   // Initialize error flag
 301         rgpu = 0;                                               // Initialize GPU assembly flag
 302         rdsp = 0;                                               // Initialize DSP assembly flag
 303         robjproc = 0;                                   // Initialize OP assembly flag
 304         lsym_flag = 1;                                  // Include local symbols in object file
 305         regbank = BANK_N;                               // No RISC register bank specified
 306         orgactive = 0;                                  // Not in RISC org section
 307         orgwarning = 0;                                 // No ORG warning issued
 308         segpadsize = 2;                                 // Initialize segment padding size
 309     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 310     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 311         m6502 = 0;                                              // 6502 mode off by default
 312
 313         // Initialize modules
 314         InitSymbolTable();                              // Symbol table
 315         InitTokenizer();                                // Tokenizer
 316         InitLineProcessor();                    // Line processor
 317         InitExpression();                               // Expression analyzer
 318         InitSection();                                  // Section manager / code generator
 319         InitMark();                                             // Mark tape-recorder
 320         InitMacro();                                    // Macro processor
 321         InitListing();                                  // Listing generator
 322         Init6502();                                             // 6502 assembler
 323
 324         // Process command line arguments and assemble source files
 325         for(argno=0; argno<argc; argno++)
 326         {
 327                 if (*argv[argno] == '-')
 328                 {
 329                         switch (argv[argno][1])
 330                         {
 331                         case 'd':                               // Define symbol
 332                         case 'D':
 333                                 for(s=argv[argno]+2; *s!=EOS;)
 334                                 {
 335                                         if (*s++ == '=')
 336                                         {
 337                                                 s[-1] = EOS;
 338                                                 break;
 339                                         }
 340                                 }
 341
 342                                 if (argv[argno][2] == EOS)
 343                                 {
 344                                         printf("-d: empty symbol\n");
 345                                         errcnt++;
 346                                         return errcnt;
 347                                 }
 348
 349                                 sy = lookup(argv[argno] + 2, 0, 0);
 350
 351                                 if (sy == NULL)
 352                                 {
 353                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 354                                         sy->svalue = 0;
 355                                 }
 356
 357                                 sy->sattr = DEFINED | EQUATED | ABS;
 358                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 359                                 break;
 360                         case 'e':                               // Redirect error message output
 361                         case 'E':
 362                                 err_fname = argv[argno] + 2;
 363                                 break;
 364                         case 'f':                               // -f<format>
 365                         case 'F':
 366                                 switch (argv[argno][2])
 367                                 {
 368                                 case EOS:
 369                                 case 'a':                       // -fa = Alcyon [the default]
 370                                 case 'A':
 371                                         obj_format = ALCYON;
 372                                         break;
 373                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 374                                 case 'B':
 375                                         obj_format = BSD;
 376                                         break;
 377                                 case 'e':                       // -fe = ELF
 378                                 case 'E':
 379                                         obj_format = ELF;
 380                                         break;
 381                 case 'l':           // -fl = LOD
 382                 case 'L':
 383                     obj_format = LOD;
 384                     break;
 385                 case 'p':           // -fp = P56
 386                 case 'P':
 387                     obj_format = P56;
 388                                         break;
 389                                 case 'x':                       // -fx = COM/EXE/XEX
 390                                 case 'X':
 391                                         obj_format = XEX;
 392                                         break;
 393                 case 'r':           // -fr = Absolute address
 394                 case 'R':
 395                     obj_format = RAW;
 396                     break;
 397                                 default:
 398                                         printf("-f: unknown object format specified\n");
 399                                         errcnt++;
 400                                         return errcnt;
 401                                 }
 402                                 break;
 403                         case 'g':                               // Debugging flag
 404                         case 'G':
 405                                 printf("Debugging flag (-g) not yet implemented\n");
 406                                 break;
 407                         case 'i':                               // Set directory search path
 408                         case 'I':
 409                         {
 410                                 searchpath = argv[argno] + 2;
 411
 412                                 // Check to see if include paths actually exist
 413                                 if (strlen(searchpath) > 0)
 414                                 {
 415                                         DIR * test = opendir(searchpath);
 416
 417                                         if (test == NULL)
 418                                         {
 419                                                 printf("Invalid include path: %s\n", searchpath);
 420                                                 errcnt++;
 421                                                 return errcnt;
 422                                         }
 423
 424                                         closedir(test);
 425                                 }
 426
 427                                 break;
 428                         }
 429                         case 'l':                               // Produce listing file
 430                         case 'L':
 431                                 if (*(argv[argno] + 2) == '*')
 432                                 {
 433                                         list_fname = argv[argno] + 3;
 434                                         list_pag = 0;    // Special case - turn off pagination
 435                                 }
 436                                 else
 437                                 {
 438                                         list_fname = argv[argno] + 2;
 439                                 }
 440
 441                                 listing = 1;
 442                                 list_flag = 1;
 443                                 lnsave++;
 444                                 break;
 445                         case 'm':
 446                         case 'M':
 447                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 448                                         d_68000();
 449                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 450                                         d_68020();
 451                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 452                                         d_68030();
 453                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 454                                         d_68040();
 455                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 456                                         d_68060();
 457                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 458                                         d_68881();
 459                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 460                                         d_68882();
 461                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 462                                         d_56001();
 463                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 464                                         d_6502();
 465                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 466                                         d_gpu();
 467                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 468                                         d_dsp();
 469                                 else
 470                                 {
 471                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 472                                         errcnt++;
 473                                         return errcnt;
 474                                 }
 475                                 break;
 476                         case 'o':                               // Direct object file output
 477                         case 'O':
 478                                 if (argv[argno][2] != EOS)
 479                                         objfname = argv[argno] + 2;
 480                                 else
 481                                 {
 482                                         if (++argno >= argc)
 483                                         {
 484                                                 printf("Missing argument to -o");
 485                                                 errcnt++;
 486                                                 return errcnt;
 487                                         }
 488
 489                                         objfname = argv[argno];
 490                                 }
 491
 492                                 break;
 493                         case 'p':               /* -p: generate ".PRG" executable output */
 494                         case 'P':
 495                                 /*
 496                                  * -p           .PRG generation w/o symbols
 497                                  * -ps          .PRG generation with symbols
 498                                  * -px          .PRG generation with extended symbols
 499                                  */
 500                                 switch (argv[argno][2])
 501                                 {
 502                                         case EOS:
 503                                                 prg_flag = 1;
 504                                                 break;
 505
 506                                         case 's':
 507                                         case 'S':
 508                                                 prg_flag = 2;
 509                                                 break;
 510
 511                                         case 'x':
 512                                         case 'X':
 513                                                 prg_flag = 3;
 514                                                 break;
 515
 516                                         default:
 517                                                 printf("-p: syntax error\n");
 518                                                 errcnt++;
 519                                                 return errcnt;
 520                                 }
 521
 522                                 // Enforce Alcyon object format - kind of silly
 523                                 // to ask for .prg output without it!
 524                                 obj_format = ALCYON;
 525                                 break;
 526                         case 'r':                               // Pad seg to requested boundary size
 527                         case 'R':
 528                                 switch(argv[argno][2])
 529                                 {
 530                                 case 'w': case 'W': segpadsize = 2;  break;
 531                                 case 'l': case 'L': segpadsize = 4;  break;
 532                                 case 'p': case 'P': segpadsize = 8;  break;
 533                                 case 'd': case 'D': segpadsize = 16; break;
 534                                 case 'q': case 'Q': segpadsize = 32; break;
 535                                 default: segpadsize = 2; break; // Effective autoeven();
 536                                 }
 537                                 break;
 538                         case 's':                               // Warn about possible short branches and applied optimisations
 539                         case 'S':
 540                                 optim_warn_flag = 1;
 541                                 break;
 542                         case 'u':                               // Make undefined symbols .globl
 543                         case 'U':
 544                                 glob_flag = 1;
 545                                 break;
 546                         case 'v':                               // Verbose flag
 547                         case 'V':
 548                                 verb_flag++;
 549
 550                                 if (verb_flag > 1)
 551                                         DisplayVersion();
 552
 553                                 break;
 554                         case 'x':                               // Turn on debugging
 555                         case 'X':
 556                                 debug = 1;
 557                                 printf("~ Debugging ON\n");
 558                                 break;
 559                         case 'y':                               // -y<pagelen>
 560                         case 'Y':
 561                                 pagelen = atoi(argv[argno] + 2);
 562
 563                                 if (pagelen < 10)
 564                                 {
 565                                         printf("-y: bad page length\n");
 566                                         errcnt++;
 567                                         return errcnt;
 568                                 }
 569
 570                                 break;
 571                         case EOS:                               // Input is stdin
 572                                 if (firstfname == NULL) // Kludge first filename
 573                                         firstfname = defname;
 574
 575                                 include(0, "(stdin)");
 576                                 Assemble();
 577                                 break;
 578                         case 'h':                               // Display command line usage
 579                         case 'H':
 580                         case '?':
 581                                 DisplayVersion();
 582                                 DisplayHelp();
 583                                 errcnt++;
 584                                 break;
 585                         case 'n':                               // Turn off legacy mode
 586                         case 'N':
 587                                 legacy_flag = 0;
 588                                 printf("Legacy mode OFF\n");
 589                                 break;
 590                         default:
 591                                 DisplayVersion();
 592                                 printf("Unknown switch: %s\n\n", argv[argno]);
 593                                 DisplayHelp();
 594                                 errcnt++;
 595                                 break;
 596                         }
 597                 }
 598                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 599                 {
 600                         if (ParseOptimization(argv[argno]) != OK)
 601                         {
 602                                 DisplayVersion();
 603                                 printf("Unknown switch: %s\n\n", argv[argno]);
 604                                 DisplayHelp();
 605                                 errcnt++;
 606                                 break;
 607                         }
 608                 }
 609                 else
 610                 {
 611                         // Record first filename.
 612                         if (firstfname == NULL)
 613                                 firstfname = argv[argno];
 614
 615                         strcpy(fnbuf, argv[argno]);
 616                         fext(fnbuf, ".s", 0);
 617                         fd = open(fnbuf, 0);
 618
 619                         if (fd < 0)
 620                         {
 621                                 printf("Cannot open: %s\n", fnbuf);
 622                                 errcnt++;
 623                                 continue;
 624                         }
 625
 626                         include(fd, fnbuf);
 627                         Assemble();
 628                 }
 629         }
 630
 631         // Wind-up processing;
 632         // o  save current section (no more code generation)
 633         // o  do auto-even of all sections (or boundary alignment as requested
 634         //    through '-r')
 635     // o  save the last pc value for 6502 (if we used 6502 at all) and
 636     //    detemine if the last section contains anything
 637         // o  determine name of object file:
 638         //    -  "foo.o" for linkable output;
 639         //    -  "foo.prg" for GEMDOS executable (-p flag).
 640         SaveSection();
 641         int temp_section = cursect;
 642
 643         for(i=TEXT; i<=BSS; i<<=1)
 644         {
 645                 SwitchSection(i);
 646
 647                 switch(segpadsize)
 648                 {
 649                 case 2:  d_even();    break;
 650                 case 4:  d_long();    break;
 651                 case 8:  d_phrase();  break;
 652                 case 16: d_dphrase(); break;
 653                 case 32: d_qphrase(); break;
 654                 }
 655
 656                 SaveSection();
 657         }
 658
 659         SwitchSection(M6502);
 660
 661         if (sloc != currentorg[0])
 662         {
 663                 currentorg[1] = sloc;
 664                 currentorg += 2;
 665         }
 666
 667         // This looks like an awful kludge...  !!! FIX !!!
 668         if (temp_section & (M56001P | M56001X | M56001Y))
 669         {
 670                 SwitchSection(temp_section);
 671
 672                 if (chptr != dsp_currentorg->start)
 673                 {
 674                         dsp_currentorg->end = chptr;
 675                         dsp_currentorg++;
 676                 }
 677         }
 678
 679         SwitchSection(TEXT);
 680
 681         if (objfname == NULL)
 682         {
 683                 if (firstfname == NULL)
 684                         firstfname = defname;
 685
 686                 strcpy(fnbuf, firstfname);
 687                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 688                 objfname = fnbuf;
 689         }
 690
 691         // With one pass finished, go back and:
 692         // (1)   run through all the fixups and resolve forward references;
 693         // (1.5) ensure that remaining fixups can be handled by the linker
 694         //       (`lo68' format, extended (postfix) format....)
 695         // (2)   generate the output file image and symbol table;
 696         // (3)   generate relocation information from left-over fixups.
 697         ResolveAllFixups();                                             // Do all fixups
 698         StopMark();                                                             // Stop mark tape-recorder
 699
 700         if (errcnt == 0)
 701         {
 702                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 703                         CantCreateFile(objfname);
 704
 705                 if (verb_flag)
 706                 {
 707                         s = (prg_flag ? "executable" : "object");
 708                         printf("[Writing %s file: %s]\n", s, objfname);
 709                 }
 710
 711                 WriteObject(fd);
 712                 close(fd);
 713
 714                 if (errcnt != 0)
 715                         unlink(objfname);
 716         }
 717
 718         if (list_flag)
 719         {
 720                 if (verb_flag)
 721                         printf("[Wrapping-up listing file]\n");
 722
 723                 listing = 1;
 724                 symtable();
 725                 close(list_fd);
 726         }
 727
 728         if (err_flag)
 729                 close(err_fd);
 730
 731         DEBUG dump_everything();
 732
 733         return errcnt;
 734 }
 735
 736
 737 //
 738 // Determine processor endianess
 739 //
 740 int GetEndianess(void)
 741 {
 742         int i = 1;
 743         char * p = (char *)&i;
 744
 745         if (p[0] == 1)
 746                 return 0;
 747
 748         return 1;
 749 }
 750
 751
 752 //
 753 // Application entry point
 754 //
 755 int main(int argc, char ** argv)
 756 {
 757         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 758         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 759
 760         // Set legacy optimisation flags to on and everything else to off
 761         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 762         optim_flags[OPT_ABS_SHORT] =
 763                 optim_flags[OPT_MOVEL_MOVEQ] =
 764                 optim_flags[OPT_BSR_BCC_S] = 1;
 765
 766         cmdlnexec = argv[0];                    // Obtain executable name
 767         endian = GetEndianess();                // Get processor endianess
 768
 769         // If commands were passed in, process them
 770         if (argc > 1)
 771                 return Process(argc - 1, argv + 1);
 772
 773         DisplayVersion();
 774         DisplayHelp();
 775
 776         return 0;
 777 }
 778