Shamusworld >> Repos - rmac/blob - rmac.c

   1 //
   2 // RMAC - Renamed Macro Assembler for all Atari computers
   3 // RMAC.C - Main Application Code
   4 // Copyright (C) 199x Landon Dyer, 2011-2022 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 glob_flag;                                  // Assume undefined symbols are global
  33 int lsym_flag;                                  // Include local symbols in object file (ALWAYS true)
  34 int optim_warn_flag;                    // Warn about possible short branches
  35 int prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
  36 int prg_extend;                                 // !=0, output extended .PRG symbols
  37 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  38 int obj_format;                                 // Object format flag
  39 int debug;                                              // [1..9] Enable debugging levels
  40 int err_flag;                                   // '-e' specified
  41 int err_fd;                                             // File to write error messages to
  42 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  43 int robjproc;                                   // Assembling Jaguar Object Processor code
  44 int dsp56001;                                   // Assembling DSP 56001 code
  45 int list_fd;                                    // File to write listing to
  46 int segpadsize;                                 // Segment padding size
  47 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  48 int *regbase;                                   // Points to current DFA register table (base)
  49 int *regtab;                                    // Points to current DFA register table (tab)
  50 int *regcheck;                                  // Points to current DFA register table (check)
  51 int *regaccept;                                 // Points to current DFA register table (accept)
  52 char * objfname;                                // Object filename pointer
  53 char * firstfname;                              // First source filename
  54 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  55 char searchpatha[512] = { 0 };  // Buffer to hold searchpath when specified
  56 char * searchpath = NULL;               // Search path for include files
  57 char defname[] = "noname.o";    // Default output filename
  58 int optim_flags[OPT_COUNT_ALL] = { 0 }; // Specific optimisations on/off matrix
  59 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  60 int activefpu = FPU_NONE;               // Active FPU (none by default)
  61 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  62 uint32_t org68k_address;                // .org for 68k
  63 int correctMathRules;                   // 1, use C operator precedence in expressions
  64
  65 //
  66 // Convert a string to uppercase
  67 //
  68 void strtoupper(char * s)
  69 {
  70         while (*s)
  71                 *s++ &= 0xDF;
  72 }
  73
  74 //
  75 // Manipulate file extension.
  76 //
  77 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  78 // nonzero, any old extension is removed. If the file does not already have an
  79 // extension, 'extension' is appended to the filename.
  80 //
  81 char * fext(char * name, char * extension, int stripp)
  82 {
  83         char * s;
  84
  85         // Find beginning of "real" name (strip off path)
  86         char * beg = strrchr(name, SLASHCHAR);
  87
  88         if (beg == NULL)
  89                 beg = name;
  90
  91         // Clobber any old extension, if requested
  92         if (stripp)
  93         {
  94                 for(s=beg; *s && *s!='.'; ++s)
  95                         ;
  96
  97                 *s = '\0';
  98         }
  99
 100         if (strrchr(beg, '.') == NULL)
 101                 strcat(beg, extension);
 102
 103         return name;
 104 }
 105
 106 static int is_sep(char c)
 107 {
 108     const char *seps = PATH_SEPS;
 109
 110     for (seps = PATH_SEPS; *seps; seps++) {
 111         if (*seps == c)
 112             return 1;
 113     }
 114
 115     return 0;
 116 }
 117
 118 //
 119 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 120 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 121 // nth path doesn't exist.
 122 //
 123 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 124 //
 125 int nthpath(char * env_var, int itemno, char * buf)
 126 {
 127         char * s = searchpath;
 128
 129         if (s == NULL)
 130                 s = getenv(env_var);
 131
 132         if (s == NULL)
 133                 return 0;
 134
 135         while (itemno--)
 136                 while (*s != EOS && !is_sep(*s++))
 137                         ;
 138
 139         if (*s == EOS)
 140                 return 0;
 141
 142         while (*s != EOS && !is_sep(*s))
 143                 *buf++ = *s++;
 144
 145         *buf++ = EOS;
 146
 147         return 1;
 148 }
 149
 150 //
 151 // Display command line help
 152 //
 153 void DisplayHelp(void)
 154 {
 155         printf("Usage:\n"
 156                 "    %s [options] srcfile\n"
 157                 "\n"
 158                 "Options:\n"
 159                 "  -? or -h          Display usage information\n"
 160                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 161                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 162                 "  -f[format]        Output object file format\n"
 163                 "                    a: ALCYON\n"
 164                 "                    b: BSD (use this for Jaguar)\n"
 165                 "                    e: ELF\n"
 166                 "                    p: P56 (use this for DSP56001 only)\n"
 167                 "                    l: LOD (use this for DSP56001 only)\n"
 168                 "                    x: com/exe/xex (Atari 800)\n"
 169                 "                    r: absolute address\n"
 170                 "  -i[path]          Directory to search for include files\n"
 171                 "  -l[filename]      Create an output listing file\n"
 172                 "  -l*[filename]     Create an output listing file without pagination\n"
 173                 "  -m[cpu]           Select default CPU. Available options:\n"
 174                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 175                 "  -n                Don't do things behind your back in RISC assembler\n"
 176                 "  -o file           Output file name\n"
 177                 "  +o[value]         Turn a specific optimisation on\n"
 178                 "                    Available optimisation switches:\n"
 179                 "                    o0: Absolute long addresses to word\n"
 180                 "                    o1: move.l #x,dn/an to moveq\n"
 181                 "                    o2: Word branches to short\n"
 182                 "                    o3: Outer displacement 0(an) to (an)\n"
 183                 "                    o4: lea size(An),An to addq #size,An\n"
 184                 "                    o5: 68020+ Absolute long base/outer disp. to word\n"
 185                 "                    o6: Null branches to NOP\n"
 186                 "                    o7: clr.l Dx to moveq #0,Dx\n"
 187                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy\n"
 188                 "                    o9: adda.w/l #x,Ay to lea x(Dy),Ay\n"
 189                 "                    o10: 56001 Use short format for immediate values if possible\n"
 190                 "                    o11: 56001 Auto convert short addressing mode to long (default: on)\n"
 191                 "                    o30: Enforce PC relative (alternative name: op)\n"
 192                 "  ~o[value]         Turn a specific optimisation off\n"
 193                 "  +oall             Turn all optimisations on\n"
 194                 "  ~oall             Turn all optimisations off\n"
 195                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 196                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 197                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 198                 "  -r[size]          Pad segments to boundary size specified\n"
 199                 "                    w: word (2 bytes, default alignment)\n"
 200                 "                    l: long (4 bytes)\n"
 201                 "                    p: phrase (8 bytes)\n"
 202                 "                    d: double phrase (16 bytes)\n"
 203                 "                    q: quad phrase (32 bytes)\n"
 204                 "  -s                Warn about possible short branches\n"
 205                 "                    and applied optimisations\n"
 206                 "  -u                Force referenced and undefined symbols global\n"
 207                 "  -v                Set verbose mode\n"
 208                 "  -x                Turn on debugging mode\n"
 209                 "  -y[pagelen]       Set page line length (default: 61)\n"
 210                 "  -4                Use C style operator precedence\n"
 211                 "\n", cmdlnexec);
 212 }
 213
 214
 215 //
 216 // Display version information
 217 //
 218 void DisplayVersion(void)
 219 {
 220         printf("\n"
 221                 " _ __ _ __ ___   __ _  ___ \n"
 222                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 223                 "| |  | | | | | | (_| | (__ \n"
 224                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 225                 "\nRenamed Macro Assembler\n"
 226                 "Copyright (C) 199x Landon Dyer, 2011-2022 Reboot and Friends\n"
 227                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 228 }
 229
 230 //
 231 // Parse optimisation options
 232 //
 233 int ParseOptimization(char * optstring)
 234 {
 235         int onoff = 0;
 236
 237         while (*optstring)
 238         {
 239                 if (*optstring == '+')
 240                         onoff = 1;
 241                 else if (*optstring != '~')
 242                         return ERROR;
 243
 244         if (optstring[2] == 0)
 245             return error(".opt called with zero arguments");
 246
 247                 if ((optstring[2] == 'a' || optstring[2] == 'A')
 248                         && (optstring[3] == 'l' || optstring[3] == 'L')
 249                         && (optstring[4] == 'l' || optstring[4] == 'L'))
 250                 {
 251                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 252                         optstring += 5;
 253                 }
 254                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 255                 {
 256                         if (optstring[2] == 'p' || optstring[2] == 'P')
 257                         {
 258                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 259                                 optstring += 3;
 260                         }
 261                         else
 262                         {
 263                                 int opt_no = atoi(&optstring[2]);
 264
 265                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 266                                 {
 267                                         optim_flags[opt_no] = onoff;
 268                                         optstring += 3;
 269
 270                                         // If opt_no is 2 digits then consume an extra character.
 271                                         // Sounds a bit sleazy but we know we're not going to hit
 272                                         // more than 100 optimisation switches so this should be
 273                                         // fine. If we do hit that number then it'll probably be
 274                                         // time to burn the whole codebase and start from scratch.
 275                                         if (opt_no > 9)
 276                                                 optstring++;
 277                                 }
 278                                 else
 279                                         return ERROR;
 280                         }
 281                 }
 282                 else
 283                 {
 284                         return ERROR;
 285                 }
 286
 287                 if (*optstring == ',')
 288                         optstring++;
 289         }
 290         return OK;
 291 }
 292
 293 extern int reg68base[53];
 294 extern int reg68tab[222];
 295 extern int reg68check[222];
 296 extern int reg68accept[222];
 297
 298 //
 299 // Process command line arguments and do an assembly
 300 //
 301 int Process(int argc, char ** argv)
 302 {
 303         int argno;                                              // Argument number
 304         SYM * sy;                                               // Pointer to a symbol record
 305         char * s;                                               // String pointer
 306         int fd;                                                 // File descriptor
 307         char fnbuf[FNSIZ];                              // Filename buffer
 308         int i;                                                  // Iterator
 309         int current_path_index = 0;             // Iterator for search paths
 310
 311         errcnt = 0;                                             // Initialize error count
 312         listing = 0;                                    // Initialize listing level
 313         list_flag = 0;                                  // Initialize listing flag
 314         verb_flag = perm_verb_flag;             // Initialize verbose flag
 315         glob_flag = 0;                                  // Initialize .globl flag
 316         optim_warn_flag = 0;                    // Initialize short branch flag
 317         debug = 0;                                              // Initialize debug flag
 318         objfname = NULL;                                // Initialize object filename
 319         list_fname = NULL;                              // Initialize listing filename
 320         err_fname = NULL;                               // Initialize error filename
 321         obj_format = BSD;                               // Initialize object format
 322         firstfname = NULL;                              // Initialize first filename
 323         err_fd = ERROUT;                                // Initialize error file descriptor
 324         err_flag = 0;                                   // Initialize error flag
 325         rgpu = 0;                                               // Initialize GPU assembly flag
 326         rdsp = 0;                                               // Initialize DSP assembly flag
 327         robjproc = 0;                                   // Initialize OP assembly flag
 328         lsym_flag = 1;                                  // Include local symbols in object file
 329         orgactive = 0;                                  // Not in RISC org section
 330         orgwarning = 0;                                 // No ORG warning issued
 331         segpadsize = 2;                                 // Initialize segment padding size
 332     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 333     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 334         m6502 = 0;                                              // 6502 mode off by default
 335         regbase = reg68base;                    // Initialise DFA register tables
 336         regtab = reg68tab;                              // Idem
 337         regcheck = reg68check;                  // Idem
 338         regaccept = reg68accept;                // Idem
 339     correctMathRules = 0;                       // respect operator precedence
 340         // Initialize modules
 341         InitSymbolTable();                              // Symbol table
 342         InitTokenizer();                                // Tokenizer
 343         InitLineProcessor();                    // Line processor
 344         InitExpression();                               // Expression analyzer
 345         InitSection();                                  // Section manager / code generator
 346         InitMark();                                             // Mark tape-recorder
 347         InitMacro();                                    // Macro processor
 348         InitListing();                                  // Listing generator
 349         Init6502();                                             // 6502 assembler
 350
 351         // Process command line arguments and assemble source files
 352         for(argno=0; argno<argc; argno++)
 353         {
 354                 if (*argv[argno] == '-')
 355                 {
 356                         switch (argv[argno][1])
 357                         {
 358                         case '4':
 359                                 correctMathRules = 1;
 360                                 break;
 361                         case 'd':                               // Define symbol
 362                         case 'D':
 363                                 for(s=argv[argno]+2; *s!=EOS;)
 364                                 {
 365                                         if (*s++ == '=')
 366                                         {
 367                                                 s[-1] = EOS;
 368                                                 break;
 369                                         }
 370                                 }
 371
 372                                 if (argv[argno][2] == EOS)
 373                                 {
 374                                         printf("-d: empty symbol\n");
 375                                         errcnt++;
 376                                         return errcnt;
 377                                 }
 378
 379                                 sy = lookup(argv[argno] + 2, 0, 0);
 380
 381                                 if (sy == NULL)
 382                                 {
 383                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 384                                         sy->svalue = 0;
 385                                 }
 386
 387                                 sy->sattr = DEFINED | EQUATED | ABS;
 388                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 389                                 break;
 390                         case 'e':                               // Redirect error message output
 391                         case 'E':
 392                                 err_fname = argv[argno] + 2;
 393                                 break;
 394                         case 'f':                               // -f<format>
 395                         case 'F':
 396                                 switch (argv[argno][2])
 397                                 {
 398                                 case EOS:
 399                                 case 'a':                       // -fa = Alcyon [the default]
 400                                 case 'A':
 401                                         obj_format = ALCYON;
 402                                         break;
 403                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 404                                 case 'B':
 405                                         obj_format = BSD;
 406                                         break;
 407                                 case 'e':                       // -fe = ELF
 408                                 case 'E':
 409                                         obj_format = ELF;
 410                                         break;
 411                 case 'l':           // -fl = LOD
 412                 case 'L':
 413                     obj_format = LOD;
 414                     break;
 415                 case 'p':           // -fp = P56
 416                 case 'P':
 417                     obj_format = P56;
 418                                         break;
 419                                 case 'x':                       // -fx = COM/EXE/XEX
 420                                 case 'X':
 421                                         obj_format = XEX;
 422                                         break;
 423                 case 'r':           // -fr = Absolute address
 424                 case 'R':
 425                     obj_format = RAW;
 426                     break;
 427                                 default:
 428                                         printf("-f: unknown object format specified\n");
 429                                         errcnt++;
 430                                         return errcnt;
 431                                 }
 432                                 break;
 433                         case 'g':                               // Debugging flag
 434                         case 'G':
 435                                 printf("Debugging flag (-g) not yet implemented\n");
 436                                 break;
 437                         case 'i':                               // Set directory search path
 438                         case 'I':
 439                         {
 440                                 strcat(searchpatha, argv[argno] + 2);
 441                                 strcat(searchpatha, ";");
 442                                 searchpath = searchpatha;
 443
 444                                 // Check to see if include paths actually exist
 445                                 char current_path[256];
 446
 447                                 for(i=current_path_index; nthpath("RMACPATH", i, current_path)!=0; i++)
 448                                 {
 449                                         if (strlen(current_path) > 0)
 450                                         {
 451                                                 DIR * test = opendir(current_path);
 452
 453                                                 if (test == NULL)
 454                                                 {
 455                                                         printf("Invalid include path: %s\n", current_path);
 456                                                         errcnt++;
 457                                                         return errcnt;
 458                                                 }
 459
 460                                                 closedir(test);
 461                                         }
 462                                 }
 463
 464                                 current_path_index = i - 1;
 465                                 break;
 466                         }
 467                         case 'l':                               // Produce listing file
 468                         case 'L':
 469                                 if (*(argv[argno] + 2) == '*')
 470                                 {
 471                                         list_fname = argv[argno] + 3;
 472                                         list_pag = 0;    // Special case - turn off pagination
 473                                 }
 474                                 else
 475                                 {
 476                                         list_fname = argv[argno] + 2;
 477                                 }
 478
 479                                 listing = 1;
 480                                 list_flag = 1;
 481                                 lnsave++;
 482                                 break;
 483                         case 'm':
 484                         case 'M':
 485                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 486                                         d_68000();
 487                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 488                                         d_68020();
 489                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 490                                         d_68030();
 491                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 492                                         d_68040();
 493                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 494                                         d_68060();
 495                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 496                                         d_68881();
 497                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 498                                         d_68882();
 499                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 500                                         d_56001();
 501                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 502                                         d_6502();
 503                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 504                                         d_gpu();
 505                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 506                                         d_dsp();
 507                                 else
 508                                 {
 509                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 510                                         errcnt++;
 511                                         return errcnt;
 512                                 }
 513                                 break;
 514                         case 'o':                               // Direct object file output
 515                         case 'O':
 516                                 if (argv[argno][2] != EOS)
 517                                         objfname = argv[argno] + 2;
 518                                 else
 519                                 {
 520                                         if (++argno >= argc)
 521                                         {
 522                                                 printf("Missing argument to -o");
 523                                                 errcnt++;
 524                                                 return errcnt;
 525                                         }
 526
 527                                         objfname = argv[argno];
 528                                 }
 529
 530                                 break;
 531                         case 'p':               /* -p: generate ".PRG" executable output */
 532                         case 'P':
 533                                 /*
 534                                  * -p           .PRG generation w/o symbols
 535                                  * -ps          .PRG generation with symbols
 536                                  * -px          .PRG generation with extended symbols
 537                                  */
 538                                 switch (argv[argno][2])
 539                                 {
 540                                         case EOS:
 541                                                 prg_flag = 1;
 542                                                 break;
 543
 544                                         case 's':
 545                                         case 'S':
 546                                                 prg_flag = 2;
 547                                                 break;
 548
 549                                         case 'x':
 550                                         case 'X':
 551                                                 prg_flag = 3;
 552                                                 break;
 553
 554                                         default:
 555                                                 printf("-p: syntax error\n");
 556                                                 errcnt++;
 557                                                 return errcnt;
 558                                 }
 559
 560                                 // Enforce Alcyon object format - kind of silly
 561                                 // to ask for .prg output without it!
 562                                 obj_format = ALCYON;
 563                                 break;
 564                         case 'r':                               // Pad seg to requested boundary size
 565                         case 'R':
 566                                 switch(argv[argno][2])
 567                                 {
 568                                 case 'w': case 'W': segpadsize = 2;  break;
 569                                 case 'l': case 'L': segpadsize = 4;  break;
 570                                 case 'p': case 'P': segpadsize = 8;  break;
 571                                 case 'd': case 'D': segpadsize = 16; break;
 572                                 case 'q': case 'Q': segpadsize = 32; break;
 573                                 default: segpadsize = 2; break; // Effective autoeven();
 574                                 }
 575                                 break;
 576                         case 's':                               // Warn about possible short branches and applied optimisations
 577                         case 'S':
 578                                 optim_warn_flag = 1;
 579                                 break;
 580                         case 'u':                               // Make undefined symbols .globl
 581                         case 'U':
 582                                 glob_flag = 1;
 583                                 break;
 584                         case 'v':                               // Verbose flag
 585                         case 'V':
 586                                 verb_flag++;
 587
 588                                 if (verb_flag > 1)
 589                                         DisplayVersion();
 590
 591                                 break;
 592                         case 'x':                               // Turn on debugging
 593                         case 'X':
 594                                 debug = 1;
 595                                 printf("~ Debugging ON\n");
 596                                 break;
 597                         case 'y':                               // -y<pagelen>
 598                         case 'Y':
 599                                 pagelen = atoi(argv[argno] + 2);
 600
 601                                 if (pagelen < 10)
 602                                 {
 603                                         printf("-y: bad page length\n");
 604                                         errcnt++;
 605                                         return errcnt;
 606                                 }
 607
 608                                 break;
 609                         case EOS:                               // Input is stdin
 610                                 if (firstfname == NULL) // Kludge first filename
 611                                         firstfname = defname;
 612
 613                                 include(0, "(stdin)");
 614                                 Assemble();
 615                                 break;
 616                         case 'h':                               // Display command line usage
 617                         case 'H':
 618                         case '?':
 619                                 DisplayVersion();
 620                                 DisplayHelp();
 621                                 errcnt++;
 622                                 break;
 623                         case 'n':                               // Turn off legacy mode
 624                         case 'N':
 625                                 legacy_flag = 0;
 626                                 printf("Legacy mode OFF\n");
 627                                 break;
 628                         default:
 629                                 DisplayVersion();
 630                                 printf("Unknown switch: %s\n\n", argv[argno]);
 631                                 DisplayHelp();
 632                                 errcnt++;
 633                                 break;
 634                         }
 635                 }
 636                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 637                 {
 638                         if (ParseOptimization(argv[argno]) != OK)
 639                         {
 640                                 DisplayVersion();
 641                                 printf("Unknown switch: %s\n\n", argv[argno]);
 642                                 DisplayHelp();
 643                                 errcnt++;
 644                                 break;
 645                         }
 646                 }
 647                 else
 648                 {
 649                         // Record first filename.
 650                         if (firstfname == NULL)
 651                                 firstfname = argv[argno];
 652
 653                         strcpy(fnbuf, argv[argno]);
 654                         fext(fnbuf, ".s", 0);
 655                         fd = open(fnbuf, 0);
 656
 657                         if (fd < 0)
 658                         {
 659                                 printf("Cannot open: %s\n", fnbuf);
 660                                 errcnt++;
 661                                 continue;
 662                         }
 663
 664                         include(fd, fnbuf);
 665                         Assemble();
 666                 }
 667         }
 668
 669         // Wind-up processing;
 670         // o  save current section (no more code generation)
 671         // o  do auto-even of all sections (or boundary alignment as requested
 672         //    through '-r')
 673     // o  save the last pc value for 6502 (if we used 6502 at all) and
 674     //    detemine if the last section contains anything
 675         // o  determine name of object file:
 676         //    -  "foo.o" for linkable output;
 677         //    -  "foo.prg" for GEMDOS executable (-p flag).
 678         SaveSection();
 679         int temp_section = cursect;
 680
 681         for(i=TEXT; i<=BSS; i<<=1)
 682         {
 683                 SwitchSection(i);
 684
 685                 switch(segpadsize)
 686                 {
 687                 case 2:  d_even();    break;
 688                 case 4:  d_long();    break;
 689                 case 8:  d_phrase();  break;
 690                 case 16: d_dphrase(); break;
 691                 case 32: d_qphrase(); break;
 692                 }
 693
 694                 SaveSection();
 695         }
 696
 697         SwitchSection(M6502);
 698
 699         if (sloc != currentorg[0])
 700         {
 701                 currentorg[1] = sloc;
 702                 currentorg += 2;
 703         }
 704
 705         // This looks like an awful kludge...  !!! FIX !!!
 706         if (temp_section & (M56001P | M56001X | M56001Y))
 707         {
 708                 SwitchSection(temp_section);
 709
 710                 if (chptr != dsp_currentorg->start)
 711                 {
 712                         dsp_currentorg->end = chptr;
 713                         dsp_currentorg++;
 714                 }
 715         }
 716
 717         SwitchSection(TEXT);
 718
 719         if (objfname == NULL)
 720         {
 721                 if (firstfname == NULL)
 722                         firstfname = defname;
 723
 724                 strcpy(fnbuf, firstfname);
 725                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 726                 objfname = fnbuf;
 727         }
 728
 729         // With one pass finished, go back and:
 730         // (1)   run through all the fixups and resolve forward references;
 731         // (1.5) ensure that remaining fixups can be handled by the linker
 732         //       (`lo68' format, extended (postfix) format....)
 733         // (2)   generate the output file image and symbol table;
 734         // (3)   generate relocation information from left-over fixups.
 735         ResolveAllFixups();                                             // Do all fixups
 736         StopMark();                                                             // Stop mark tape-recorder
 737
 738         if (errcnt == 0)
 739         {
 740                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 741                         CantCreateFile(objfname);
 742
 743                 if (verb_flag)
 744                 {
 745                         s = (prg_flag ? "executable" : "object");
 746                         printf("[Writing %s file: %s]\n", s, objfname);
 747                 }
 748
 749                 WriteObject(fd);
 750                 close(fd);
 751
 752                 if (errcnt != 0)
 753                         unlink(objfname);
 754         }
 755
 756         if (list_flag)
 757         {
 758                 if (verb_flag)
 759                         printf("[Wrapping-up listing file]\n");
 760
 761                 listing = 1;
 762                 symtable();
 763                 close(list_fd);
 764         }
 765
 766         if (err_flag)
 767                 close(err_fd);
 768
 769         DEBUG dump_everything();
 770
 771         return errcnt;
 772 }
 773
 774 //
 775 // Determine processor endianess
 776 //
 777 int GetEndianess(void)
 778 {
 779         int i = 1;
 780         char * p = (char *)&i;
 781
 782         if (p[0] == 1)
 783                 return 0;
 784
 785         return 1;
 786 }
 787
 788 //
 789 // Application entry point
 790 //
 791 int main(int argc, char ** argv)
 792 {
 793         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 794         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 795         optim_flags[OPT_56K_SHORT] = 1; // This ensures compatibilty with Motorola's 56k assembler
 796
 797         cmdlnexec = argv[0];                    // Obtain executable name
 798         endian = GetEndianess();                // Get processor endianess
 799
 800         // If commands were passed in, process them
 801         if (argc > 1)
 802                 return Process(argc - 1, argv + 1);
 803
 804         DisplayVersion();
 805         DisplayHelp();
 806
 807         return 0;
 808 }