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