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 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 = 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 optim_pc = 0;                               // Enforce PC relative
  57 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  58 int activefpu = FPU_NONE;               // Active FPU (none by default)
  59 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  60 uint32_t org68k_address;                // .org for 68k
  61
  62 //
  63 // Convert a string to uppercase
  64 //
  65 void strtoupper(char * s)
  66 {
  67         while (*s)
  68                 *s++ &= 0xDF;
  69 }
  70
  71
  72 //
  73 // Manipulate file extension.
  74 //
  75 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  76 // nonzero, any old extension is removed. If the file does not already have an
  77 // extension, 'extension' is appended to the filename.
  78 //
  79 char * fext(char * name, char * extension, int stripp)
  80 {
  81         char * s;
  82
  83         // Find beginning of "real" name (strip off path)
  84         char * beg = strrchr(name, SLASHCHAR);
  85
  86         if (beg == NULL)
  87                 beg = name;
  88
  89         // Clobber any old extension, if requested
  90         if (stripp)
  91         {
  92                 for(s=beg; *s && *s!='.'; ++s)
  93                         ;
  94
  95                 *s = '\0';
  96         }
  97
  98         if (strrchr(beg, '.') == NULL)
  99                 strcat(beg, extension);
 100
 101         return name;
 102 }
 103
 104
 105 //
 106 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 107 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 108 // nth path doesn't exist.
 109 //
 110 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 111 //
 112 int nthpath(char * env_var, int itemno, char * buf)
 113 {
 114         char * s = searchpath;
 115
 116         if (s == NULL)
 117                 s = getenv(env_var);
 118
 119         if (s == NULL)
 120                 return 0;
 121
 122         while (itemno--)
 123                 while (*s != EOS && *s++ != ';')
 124                         ;
 125
 126         if (*s == EOS)
 127                 return 0;
 128
 129         while (*s != EOS && *s != ';')
 130                 *buf++ = *s++;
 131
 132         *buf++ = EOS;
 133
 134         return 1;
 135 }
 136
 137
 138 //
 139 // Display command line help
 140 //
 141 void DisplayHelp(void)
 142 {
 143         printf("Usage:\n"
 144                 "    %s [options] srcfile\n"
 145                 "\n"
 146                 "Options:\n"
 147                 "  -? or -h          Display usage information\n"
 148                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 149                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 150                 "  -f[format]        Output object file format\n"
 151                 "                    a: ALCYON\n"
 152                 "                    b: BSD (use this for Jaguar)\n"
 153                 "                    e: ELF\n"
 154                 "                    p: P56 (use this for DSP56001 only)\n"
 155                 "                    l: LOD (use this for DSP56001 only)\n"
 156                 "                    x: com/exe/xex (Atari 800)\n"
 157                 "                    r: absolute address\n"
 158                 "  -i[path]          Directory to search for include files\n"
 159                 "  -l[filename]      Create an output listing file\n"
 160                 "  -l*[filename]     Create an output listing file without pagination\n"
 161                 "  -m[cpu]           Select default CPU. Available options:\n"
 162                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 163                 "  -n                Don't do things behind your back in RISC assembler\n"
 164                 "  -o file           Output file name\n"
 165                 "  +o[value]         Turn a specific optimisation on\n"
 166                 "                    Available optimisation values and default settings:\n"
 167                 "                    o0: Absolute long adddresses to word        (on)\n"
 168                 "                    o1: move.l #x,dn/an to moveq                (on)\n"
 169                 "                    o2: Word branches to short                  (on)\n"
 170                 "                    o3: Outer displacement 0(an) to (an)        (off)\n"
 171                 "                    o4: lea size(An),An to addq #size,An        (off)\n"
 172                 "                    o5: Absolute long base displacement to word (off)\n"
 173                 "                    o6: Null branches to NOP                    (off)\n"
 174                 "                    o7: clr.l Dx to moveq #0,Dx                 (off)\n"
 175                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy        (off)\n"
 176                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy          (off)\n"
 177                 "                    op: Enforce PC relative                     (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). Forces -fa\n"
 182                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 183                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 184                 "  -r[size]          Pad segments to boundary size specified\n"
 185                 "                    w: word (2 bytes, default alignment)\n"
 186                 "                    l: long (4 bytes)\n"
 187                 "                    p: phrase (8 bytes)\n"
 188                 "                    d: double phrase (16 bytes)\n"
 189                 "                    q: quad phrase (32 bytes)\n"
 190                 "  -s                Warn about possible short branches\n"
 191                 "                    and applied optimisations\n"
 192                 "  -u                Force referenced and undefined symbols global\n"
 193                 "  -v                Set verbose mode\n"
 194                 "  -x                Turn on debugging mode\n"
 195                 "  -y[pagelen]       Set page line length (default: 61)\n"
 196                 "\n", cmdlnexec);
 197 }
 198
 199
 200 //
 201 // Display version information
 202 //
 203 void DisplayVersion(void)
 204 {
 205         printf("\n"
 206                 " _ __ _ __ ___   __ _  ___ \n"
 207                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 208                 "| |  | | | | | | (_| | (__ \n"
 209                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 210                 "\nReboot's Macro Assembler\n"
 211                 "Copyright (C) 199x Landon Dyer, 2011-2020 Reboot\n"
 212                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 213 }
 214
 215
 216 //
 217 // Parse optimisation options
 218 //
 219 int ParseOptimization(char * optstring)
 220 {
 221         int onoff = 0;
 222
 223         if (*optstring == '+')
 224                 onoff = 1;
 225         else if (*optstring != '~')
 226                 return ERROR;
 227
 228         if ((optstring[2] == 'a' || optstring[2] == 'A')
 229                 && (optstring[3] == 'l' || optstring[3] == 'L')
 230                 && (optstring[4] == 'l' || optstring[4] == 'L'))
 231         {
 232                 memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 233                 return OK;
 234         }
 235         else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 236         {
 237                 if (optstring[2] == 'p' || optstring[2] == 'P')
 238                 {
 239                         optim_pc = 1;
 240                         return OK;
 241                 }
 242
 243                 int opt_no = atoi(&optstring[2]);
 244
 245                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 246                 {
 247                         optim_flags[opt_no] = onoff;
 248                         return OK;
 249                 }
 250                 else
 251                         return ERROR;
 252         }
 253         else
 254         {
 255                 return ERROR;
 256         }
 257 }
 258
 259
 260 //
 261 // Process command line arguments and do an assembly
 262 //
 263 int Process(int argc, char ** argv)
 264 {
 265         int argno;                                              // Argument number
 266         SYM * sy;                                               // Pointer to a symbol record
 267         char * s;                                               // String pointer
 268         int fd;                                                 // File descriptor
 269         char fnbuf[FNSIZ];                              // Filename buffer
 270         int i;                                                  // Iterator
 271
 272         errcnt = 0;                                             // Initialize error count
 273         listing = 0;                                    // Initialize listing level
 274         list_flag = 0;                                  // Initialize listing flag
 275         verb_flag = perm_verb_flag;             // Initialize verbose flag
 276         as68_flag = 0;                                  // Initialize as68 kludge mode
 277         glob_flag = 0;                                  // Initialize .globl flag
 278         sbra_flag = 0;                                  // Initialize short branch flag
 279         debug = 0;                                              // Initialize debug flag
 280         searchpath = NULL;                              // Initialize search path
 281         objfname = NULL;                                // Initialize object filename
 282         list_fname = NULL;                              // Initialize listing filename
 283         err_fname = NULL;                               // Initialize error filename
 284         obj_format = BSD;                               // Initialize object format
 285         firstfname = NULL;                              // Initialize first filename
 286         err_fd = ERROUT;                                // Initialize error file descriptor
 287         err_flag = 0;                                   // Initialize error flag
 288         rgpu = 0;                                               // Initialize GPU assembly flag
 289         rdsp = 0;                                               // Initialize DSP assembly flag
 290         robjproc = 0;                                   // Initialize OP assembly flag
 291         lsym_flag = 1;                                  // Include local symbols in object file
 292         regbank = BANK_N;                               // No RISC register bank specified
 293         orgactive = 0;                                  // Not in RISC org section
 294         orgwarning = 0;                                 // No ORG warning issued
 295         segpadsize = 2;                                 // Initialize segment padding size
 296     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 297     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 298         m6502 = 0;                                              // 6502 mode off by default
 299
 300         // Initialize modules
 301         InitSymbolTable();                              // Symbol table
 302         InitTokenizer();                                // Tokenizer
 303         InitLineProcessor();                    // Line processor
 304         InitExpression();                               // Expression analyzer
 305         InitSection();                                  // Section manager / code generator
 306         InitMark();                                             // Mark tape-recorder
 307         InitMacro();                                    // Macro processor
 308         InitListing();                                  // Listing generator
 309         Init6502();                                             // 6502 assembler
 310
 311         // Process command line arguments and assemble source files
 312         for(argno=0; argno<argc; argno++)
 313         {
 314                 if (*argv[argno] == '-')
 315                 {
 316                         switch (argv[argno][1])
 317                         {
 318                         case 'd':                               // Define symbol
 319                         case 'D':
 320                                 for(s=argv[argno]+2; *s!=EOS;)
 321                                 {
 322                                         if (*s++ == '=')
 323                                         {
 324                                                 s[-1] = EOS;
 325                                                 break;
 326                                         }
 327                                 }
 328
 329                                 if (argv[argno][2] == EOS)
 330                                 {
 331                                         printf("-d: empty symbol\n");
 332                                         errcnt++;
 333                                         return errcnt;
 334                                 }
 335
 336                                 sy = lookup(argv[argno] + 2, 0, 0);
 337
 338                                 if (sy == NULL)
 339                                 {
 340                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 341                                         sy->svalue = 0;
 342                                 }
 343
 344                                 sy->sattr = DEFINED | EQUATED | ABS;
 345                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 346                                 break;
 347                         case 'e':                               // Redirect error message output
 348                         case 'E':
 349                                 err_fname = argv[argno] + 2;
 350                                 break;
 351                         case 'f':                               // -f<format>
 352                         case 'F':
 353                                 switch (argv[argno][2])
 354                                 {
 355                                 case EOS:
 356                                 case 'a':                       // -fa = Alcyon [the default]
 357                                 case 'A':
 358                                         obj_format = ALCYON;
 359                                         break;
 360                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 361                                 case 'B':
 362                                         obj_format = BSD;
 363                                         break;
 364                                 case 'e':                       // -fe = ELF
 365                                 case 'E':
 366                                         obj_format = ELF;
 367                                         break;
 368                 case 'l':           // -fl = LOD
 369                 case 'L':
 370                     obj_format = LOD;
 371                     break;
 372                 case 'p':           // -fp = P56
 373                 case 'P':
 374                     obj_format = P56;
 375                                         break;
 376                                 case 'x':                       // -fx = COM/EXE/XEX
 377                                 case 'X':
 378                                         obj_format = XEX;
 379                                         break;
 380                 case 'r':           // -fr = Absolute address
 381                 case 'R':
 382                     obj_format = RAW;
 383                     break;
 384                                 default:
 385                                         printf("-f: unknown object format specified\n");
 386                                         errcnt++;
 387                                         return errcnt;
 388                                 }
 389                                 break;
 390                         case 'g':                               // Debugging flag
 391                         case 'G':
 392                                 printf("Debugging flag (-g) not yet implemented\n");
 393                                 break;
 394                         case 'i':                               // Set directory search path
 395                         case 'I':
 396                         {
 397                                 searchpath = argv[argno] + 2;
 398
 399                                 // Check to see if include paths actually exist
 400                                 if (strlen(searchpath) > 0)
 401                                 {
 402                                         DIR * test = opendir(searchpath);
 403
 404                                         if (test == NULL)
 405                                         {
 406                                                 printf("Invalid include path: %s\n", searchpath);
 407                                                 errcnt++;
 408                                                 return errcnt;
 409                                         }
 410
 411                                         closedir(test);
 412                                 }
 413
 414                                 break;
 415                         }
 416                         case 'l':                               // Produce listing file
 417                         case 'L':
 418                                 if (*(argv[argno] + 2) == '*')
 419                                 {
 420                                         list_fname = argv[argno] + 3;
 421                                         list_pag = 0;    // Special case - turn off pagination
 422                                 }
 423                                 else
 424                                 {
 425                                         list_fname = argv[argno] + 2;
 426                                 }
 427
 428                                 listing = 1;
 429                                 list_flag = 1;
 430                                 lnsave++;
 431                                 break;
 432                         case 'm':
 433                         case 'M':
 434                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 435                                         d_68000();
 436                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 437                                         d_68020();
 438                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 439                                         d_68030();
 440                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 441                                         d_68040();
 442                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 443                                         d_68060();
 444                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 445                                         d_68881();
 446                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 447                                         d_68882();
 448                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 449                                         d_56001();
 450                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 451                                         d_6502();
 452                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 453                                         d_gpu();
 454                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 455                                         d_dsp();
 456                                 else
 457                                 {
 458                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 459                                         errcnt++;
 460                                         return errcnt;
 461                                 }
 462                                 break;
 463                         case 'o':                               // Direct object file output
 464                         case 'O':
 465                                 if (argv[argno][2] != EOS)
 466                                         objfname = argv[argno] + 2;
 467                                 else
 468                                 {
 469                                         if (++argno >= argc)
 470                                         {
 471                                                 printf("Missing argument to -o");
 472                                                 errcnt++;
 473                                                 return errcnt;
 474                                         }
 475
 476                                         objfname = argv[argno];
 477                                 }
 478
 479                                 break;
 480                         case 'p':               /* -p: generate ".PRG" executable output */
 481                         case 'P':
 482                                 /*
 483                                  * -p           .PRG generation w/o symbols
 484                                  * -ps          .PRG generation with symbols
 485                                  * -px          .PRG generation with extended symbols
 486                                  */
 487                                 switch (argv[argno][2])
 488                                 {
 489                                         case EOS:
 490                                                 prg_flag = 1;
 491                                                 break;
 492
 493                                         case 's':
 494                                         case 'S':
 495                                                 prg_flag = 2;
 496                                                 break;
 497
 498                                         case 'x':
 499                                         case 'X':
 500                                                 prg_flag = 3;
 501                                                 break;
 502
 503                                         default:
 504                                                 printf("-p: syntax error\n");
 505                                                 errcnt++;
 506                                                 return errcnt;
 507                                 }
 508
 509                                 // Enforce Alcyon object format - kind of silly
 510                                 // to ask for .prg output without it!
 511                                 obj_format = ALCYON;
 512                                 break;
 513                         case 'r':                               // Pad seg to requested boundary size
 514                         case 'R':
 515                                 switch(argv[argno][2])
 516                                 {
 517                                 case 'w': case 'W': segpadsize = 2;  break;
 518                                 case 'l': case 'L': segpadsize = 4;  break;
 519                                 case 'p': case 'P': segpadsize = 8;  break;
 520                                 case 'd': case 'D': segpadsize = 16; break;
 521                                 case 'q': case 'Q': segpadsize = 32; break;
 522                                 default: segpadsize = 2; break; // Effective autoeven();
 523                                 }
 524                                 break;
 525                         case 's':                               // Warn about possible short branches
 526                         case 'S':
 527                                 sbra_flag = 1;
 528                                 break;
 529                         case 'u':                               // Make undefined symbols .globl
 530                         case 'U':
 531                                 glob_flag = 1;
 532                                 break;
 533                         case 'v':                               // Verbose flag
 534                         case 'V':
 535                                 verb_flag++;
 536
 537                                 if (verb_flag > 1)
 538                                         DisplayVersion();
 539
 540                                 break;
 541                         case 'x':                               // Turn on debugging
 542                         case 'X':
 543                                 debug = 1;
 544                                 printf("~ Debugging ON\n");
 545                                 break;
 546                         case 'y':                               // -y<pagelen>
 547                         case 'Y':
 548                                 pagelen = atoi(argv[argno] + 2);
 549
 550                                 if (pagelen < 10)
 551                                 {
 552                                         printf("-y: bad page length\n");
 553                                         errcnt++;
 554                                         return errcnt;
 555                                 }
 556
 557                                 break;
 558                         case EOS:                               // Input is stdin
 559                                 if (firstfname == NULL) // Kludge first filename
 560                                         firstfname = defname;
 561
 562                                 include(0, "(stdin)");
 563                                 Assemble();
 564                                 break;
 565                         case 'h':                               // Display command line usage
 566                         case 'H':
 567                         case '?':
 568                                 DisplayVersion();
 569                                 DisplayHelp();
 570                                 errcnt++;
 571                                 break;
 572                         case 'n':                               // Turn off legacy mode
 573                         case 'N':
 574                                 legacy_flag = 0;
 575                                 printf("Legacy mode OFF\n");
 576                                 break;
 577                         default:
 578                                 DisplayVersion();
 579                                 printf("Unknown switch: %s\n\n", argv[argno]);
 580                                 DisplayHelp();
 581                                 errcnt++;
 582                                 break;
 583                         }
 584                 }
 585                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 586                 {
 587                         if (ParseOptimization(argv[argno]) != OK)
 588                         {
 589                                 DisplayVersion();
 590                                 printf("Unknown switch: %s\n\n", argv[argno]);
 591                                 DisplayHelp();
 592                                 errcnt++;
 593                                 break;
 594                         }
 595                 }
 596                 else
 597                 {
 598                         // Record first filename.
 599                         if (firstfname == NULL)
 600                                 firstfname = argv[argno];
 601
 602                         strcpy(fnbuf, argv[argno]);
 603                         fext(fnbuf, ".s", 0);
 604                         fd = open(fnbuf, 0);
 605
 606                         if (fd < 0)
 607                         {
 608                                 printf("Cannot open: %s\n", fnbuf);
 609                                 errcnt++;
 610                                 continue;
 611                         }
 612
 613                         include(fd, fnbuf);
 614                         Assemble();
 615                 }
 616         }
 617
 618         // Wind-up processing;
 619         // o  save current section (no more code generation)
 620         // o  do auto-even of all sections (or boundary alignment as requested
 621         //    through '-r')
 622     // o  save the last pc value for 6502 (if we used 6502 at all) and
 623     //    detemine if the last section contains anything
 624         // o  determine name of object file:
 625         //    -  "foo.o" for linkable output;
 626         //    -  "foo.prg" for GEMDOS executable (-p flag).
 627         SaveSection();
 628         int temp_section = cursect;
 629
 630         for(i=TEXT; i<=BSS; i<<=1)
 631         {
 632                 SwitchSection(i);
 633
 634                 switch(segpadsize)
 635                 {
 636                 case 2:  d_even();    break;
 637                 case 4:  d_long();    break;
 638                 case 8:  d_phrase();  break;
 639                 case 16: d_dphrase(); break;
 640                 case 32: d_qphrase(); break;
 641                 }
 642
 643                 SaveSection();
 644         }
 645
 646         SwitchSection(M6502);
 647
 648         if (sloc != currentorg[0])
 649         {
 650                 currentorg[1] = sloc;
 651                 currentorg += 2;
 652         }
 653
 654         // This looks like an awful kludge...  !!! FIX !!!
 655         if (temp_section & (M56001P | M56001X | M56001Y))
 656         {
 657                 SwitchSection(temp_section);
 658
 659                 if (chptr != dsp_currentorg->start)
 660                 {
 661                         dsp_currentorg->end = chptr;
 662                         dsp_currentorg++;
 663                 }
 664         }
 665
 666         SwitchSection(TEXT);
 667
 668         if (objfname == NULL)
 669         {
 670                 if (firstfname == NULL)
 671                         firstfname = defname;
 672
 673                 strcpy(fnbuf, firstfname);
 674                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 675                 objfname = fnbuf;
 676         }
 677
 678         // With one pass finished, go back and:
 679         // (1)   run through all the fixups and resolve forward references;
 680         // (1.5) ensure that remaining fixups can be handled by the linker
 681         //       (`lo68' format, extended (postfix) format....)
 682         // (2)   generate the output file image and symbol table;
 683         // (3)   generate relocation information from left-over fixups.
 684         ResolveAllFixups();                                             // Do all fixups
 685         StopMark();                                                             // Stop mark tape-recorder
 686
 687         if (errcnt == 0)
 688         {
 689                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 690                         CantCreateFile(objfname);
 691
 692                 if (verb_flag)
 693                 {
 694                         s = (prg_flag ? "executable" : "object");
 695                         printf("[Writing %s file: %s]\n", s, objfname);
 696                 }
 697
 698                 WriteObject(fd);
 699                 close(fd);
 700
 701                 if (errcnt != 0)
 702                         unlink(objfname);
 703         }
 704
 705         if (list_flag)
 706         {
 707                 if (verb_flag)
 708                         printf("[Wrapping-up listing file]\n");
 709
 710                 listing = 1;
 711                 symtable();
 712                 close(list_fd);
 713         }
 714
 715         if (err_flag)
 716                 close(err_fd);
 717
 718         DEBUG dump_everything();
 719
 720         return errcnt;
 721 }
 722
 723
 724 //
 725 // Determine processor endianess
 726 //
 727 int GetEndianess(void)
 728 {
 729         int i = 1;
 730         char * p = (char *)&i;
 731
 732         if (p[0] == 1)
 733                 return 0;
 734
 735         return 1;
 736 }
 737
 738
 739 //
 740 // Application entry point
 741 //
 742 int main(int argc, char ** argv)
 743 {
 744         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 745         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 746
 747         // Set legacy optimisation flags to on and everything else to off
 748         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 749         optim_flags[OPT_ABS_SHORT] =
 750                 optim_flags[OPT_MOVEL_MOVEQ] =
 751                 optim_flags[OPT_BSR_BCC_S] = 1;
 752
 753         cmdlnexec = argv[0];                    // Obtain executable name
 754         endian = GetEndianess();                // Get processor endianess
 755
 756         // If commands were passed in, process them
 757         if (argc > 1)
 758                 return Process(argc - 1, argv + 1);
 759
 760         DisplayVersion();
 761         DisplayHelp();
 762
 763         return 0;
 764 }
 765