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 dsym_flag;                                  // Gen debug syms (Requires obj_format = BSD)
  35 int optim_warn_flag;                    // Warn about possible short branches
  36 int prg_flag;                                   // !=0, produce .PRG executable (2=symbols)
  37 int prg_extend;                                 // !=0, output extended .PRG symbols
  38 int legacy_flag;                                // Do stuff like insert code in RISC assembler
  39 int obj_format;                                 // Object format flag
  40 int debug;                                              // [1..9] Enable debugging levels
  41 int err_flag;                                   // '-e' specified
  42 int err_fd;                                             // File to write error messages to
  43 int rgpu, rdsp;                                 // Assembling Jaguar GPU or DSP code
  44 int robjproc;                                   // Assembling Jaguar Object Processor code
  45 int dsp56001;                                   // Assembling DSP 56001 code
  46 int list_fd;                                    // File to write listing to
  47 int segpadsize;                                 // Segment padding size
  48 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  49 int *regbase;                                   // Points to current DFA register table (base)
  50 int *regtab;                                    // Points to current DFA register table (tab)
  51 int *regcheck;                                  // Points to current DFA register table (check)
  52 int *regaccept;                                 // Points to current DFA register table (accept)
  53 char * objfname;                                // Object filename pointer
  54 char * firstfname;                              // First source filename
  55 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  56 char searchpatha[512] = { 0 };  // Buffer to hold searchpath when specified
  57 char * searchpath = NULL;               // Search path for include files
  58 char defname[] = "noname.o";    // Default output filename
  59 int optim_flags[OPT_COUNT_ALL] = { 0 }; // Specific optimisations on/off matrix
  60 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  61 int activefpu = FPU_NONE;               // Active FPU (none by default)
  62 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  63 uint32_t org68k_address;                // .org for 68k
  64 int correctMathRules;                   // 1, use C operator precedence in expressions
  65 uint32_t used_architectures;    // Bitmask that records exactly which architectures were used during assembly
  66
  67 //
  68 // Convert a string to uppercase
  69 //
  70 void strtoupper(char * s)
  71 {
  72         while (*s)
  73                 *s++ &= 0xDF;
  74 }
  75
  76 //
  77 // Manipulate file extension.
  78 //
  79 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  80 // nonzero, any old extension is removed. If the file does not already have an
  81 // extension, 'extension' is appended to the filename.
  82 //
  83 char * fext(char * name, char * extension, int stripp)
  84 {
  85         char * s;
  86
  87         // Find beginning of "real" name (strip off path)
  88         char * beg = strrchr(name, SLASHCHAR);
  89
  90         if (beg == NULL)
  91                 beg = name;
  92
  93         // Clobber any old extension, if requested
  94         if (stripp)
  95         {
  96                 for(s=beg; *s && *s!='.'; ++s)
  97                         ;
  98
  99                 *s = '\0';
 100         }
 101
 102         if (strrchr(beg, '.') == NULL)
 103                 strcat(beg, extension);
 104
 105         return name;
 106 }
 107
 108 static int is_sep(char c)
 109 {
 110     const char *seps = PATH_SEPS;
 111
 112     for (seps = PATH_SEPS; *seps; seps++) {
 113         if (*seps == c)
 114             return 1;
 115     }
 116
 117     return 0;
 118 }
 119
 120 //
 121 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 122 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 123 // nth path doesn't exist.
 124 //
 125 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 126 //
 127 int nthpath(char * env_var, int itemno, char * buf)
 128 {
 129         char * s = searchpath;
 130
 131         if (s == NULL)
 132                 s = getenv(env_var);
 133
 134         if (s == NULL)
 135                 return 0;
 136
 137         while (itemno--)
 138                 while (*s != EOS && !is_sep(*s++))
 139                         ;
 140
 141         if (*s == EOS)
 142                 return 0;
 143
 144         while (*s != EOS && !is_sep(*s))
 145                 *buf++ = *s++;
 146
 147         *buf++ = EOS;
 148
 149         return 1;
 150 }
 151
 152 //
 153 // Display command line help
 154 //
 155 void DisplayHelp(void)
 156 {
 157         printf("Usage:\n"
 158                 "    %s [options] srcfile\n"
 159                 "\n"
 160                 "Options:\n"
 161                 "  -? or -h          Display usage information\n"
 162                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 163                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 164                 "  -f[format]        Output object file format\n"
 165                 "                    a: ALCYON\n"
 166                 "                    b: BSD (use this for Jaguar)\n"
 167                 "                    c: PRG (C64)\n"
 168                 "                    e: ELF\n"
 169                 "                    p: P56 (use this for DSP56001 only)\n"
 170                 "                    l: LOD (use this for DSP56001 only)\n"
 171                 "                    x: com/exe/xex (Atari 800)\n"
 172                 "                    r: absolute address\n"
 173                 "  -g                Output source level debug information (BSD object only)\n"
 174                 "  -i[path]          Directory to search for include files\n"
 175                 "  -l[filename]      Create an output listing file\n"
 176                 "  -l*[filename]     Create an output listing file without pagination\n"
 177                 "  -m[cpu]           Select default CPU. Available options:\n"
 178                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 179                 "  -n                Don't do things behind your back in RISC assembler\n"
 180                 "  -o file           Output file name\n"
 181                 "  +o[value]         Turn a specific optimisation on\n"
 182                 "                    Available optimisation switches:\n"
 183                 "                    o0: Absolute long addresses to word\n"
 184                 "                    o1: move.l #x,dn/an to moveq\n"
 185                 "                    o2: Word branches to short\n"
 186                 "                    o3: Outer displacement 0(an) to (an)\n"
 187                 "                    o4: lea size(An),An to addq #size,An\n"
 188                 "                    o5: 68020+ Absolute long base/outer disp. to word\n"
 189                 "                    o6: Null branches to NOP\n"
 190                 "                    o7: clr.l Dx to moveq #0,Dx\n"
 191                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy\n"
 192                 "                    o9: adda.w/l #x,Ay to lea x(Dy),Ay\n"
 193                 "                    o10: 56001 Use short format for immediate values if possible\n"
 194                 "                    o11: 56001 Auto convert short addressing mode to long (default: on)\n"
 195                 "                    o30: Enforce PC relative (alternative name: op)\n"
 196                 "  ~o[value]         Turn a specific optimisation off\n"
 197                 "  +oall             Turn all optimisations on\n"
 198                 "  ~oall             Turn all optimisations off\n"
 199                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 200                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 201                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 202                 "  -r[size]          Pad segments to boundary size specified\n"
 203                 "                    w: word (2 bytes, default alignment)\n"
 204                 "                    l: long (4 bytes)\n"
 205                 "                    p: phrase (8 bytes)\n"
 206                 "                    d: double phrase (16 bytes)\n"
 207                 "                    q: quad phrase (32 bytes)\n"
 208                 "  -s                Warn about possible short branches\n"
 209                 "                    and applied optimisations\n"
 210                 "  -u                Force referenced and undefined symbols global\n"
 211                 "  -v                Set verbose mode\n"
 212                 "  -x                Turn on debugging mode\n"
 213                 "  -y[pagelen]       Set page line length (default: 61)\n"
 214                 "  -4                Use C style operator precedence\n"
 215                 "\n", cmdlnexec);
 216 }
 217
 218
 219 //
 220 // Display version information
 221 //
 222 void DisplayVersion(void)
 223 {
 224         printf("\n"
 225                 " _ __ _ __ ___   __ _  ___ \n"
 226                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 227                 "| |  | | | | | | (_| | (__ \n"
 228                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 229                 "\nRenamed Macro Assembler\n"
 230                 "Copyright (C) 199x Landon Dyer, 2011-2022 Reboot and Friends\n"
 231                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 232 }
 233
 234 //
 235 // Parse optimisation options
 236 //
 237 int ParseOptimization(char * optstring)
 238 {
 239         int onoff = 0;
 240
 241         while (*optstring)
 242         {
 243                 if (*optstring == '+')
 244                         onoff = 1;
 245                 else if (*optstring != '~')
 246                         return ERROR;
 247
 248         if (optstring[2] == 0)
 249             return error(".opt called with zero arguments");
 250
 251                 if ((optstring[2] == 'a' || optstring[2] == 'A')
 252                         && (optstring[3] == 'l' || optstring[3] == 'L')
 253                         && (optstring[4] == 'l' || optstring[4] == 'L'))
 254                 {
 255                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 256                         optstring += 5;
 257                 }
 258                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 259                 {
 260                         if (optstring[2] == 'p' || optstring[2] == 'P')
 261                         {
 262                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 263                                 optstring += 3;
 264                         }
 265                         else
 266                         {
 267                                 int opt_no = atoi(&optstring[2]);
 268
 269                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 270                                 {
 271                                         optim_flags[opt_no] = onoff;
 272                                         optstring += 3;
 273
 274                                         // If opt_no is 2 digits then consume an extra character.
 275                                         // Sounds a bit sleazy but we know we're not going to hit
 276                                         // more than 100 optimisation switches so this should be
 277                                         // fine. If we do hit that number then it'll probably be
 278                                         // time to burn the whole codebase and start from scratch.
 279                                         if (opt_no > 9)
 280                                                 optstring++;
 281                                 }
 282                                 else
 283                                         return ERROR;
 284                         }
 285                 }
 286                 else
 287                 {
 288                         return ERROR;
 289                 }
 290
 291                 if (*optstring == ',')
 292                         optstring++;
 293         }
 294         return OK;
 295 }
 296
 297 static void ProcessFile(int fd, char *fname)
 298 {
 299         char *dbgname = fname;
 300
 301         if (NULL == fname)
 302         {
 303                 fname = defname; // Kludge first filename
 304                 dbgname = "(stdin)";
 305         }
 306
 307         // First file operations:
 308         if (firstfname == NULL)
 309         {
 310                 // Record first filename.
 311                 firstfname = fname;
 312
 313                 // Validate option compatibility
 314                 if (dsym_flag)
 315                 {
 316                         if (obj_format != BSD)
 317                         {
 318                                 printf("-g: debug information only supported with BSD object file format\n");
 319                                 dsym_flag = 0;
 320                                 errcnt++;
 321                         }
 322                         else
 323                         {
 324                                 GenMainFileSym(dbgname);
 325                         }
 326                 }
 327         }
 328
 329         include(fd, dbgname);
 330         Assemble();
 331 }
 332
 333 extern int reg68base[53];
 334 extern int reg68tab[222];
 335 extern int reg68check[222];
 336 extern int reg68accept[222];
 337
 338 //
 339 // Process command line arguments and do an assembly
 340 //
 341 int Process(int argc, char ** argv)
 342 {
 343         int argno;                                              // Argument number
 344         SYM * sy;                                               // Pointer to a symbol record
 345         char * s;                                               // String pointer
 346         int fd;                                                 // File descriptor
 347         char fnbuf[FNSIZ];                              // Filename buffer
 348         int i;                                                  // Iterator
 349         int current_path_index = 0;             // Iterator for search paths
 350
 351         errcnt = 0;                                             // Initialize error count
 352         listing = 0;                                    // Initialize listing level
 353         list_flag = 0;                                  // Initialize listing flag
 354         verb_flag = perm_verb_flag;             // Initialize verbose flag
 355         glob_flag = 0;                                  // Initialize .globl flag
 356         optim_warn_flag = 0;                    // Initialize short branch flag
 357         debug = 0;                                              // Initialize debug flag
 358         objfname = NULL;                                // Initialize object filename
 359         list_fname = NULL;                              // Initialize listing filename
 360         err_fname = NULL;                               // Initialize error filename
 361         obj_format = BSD;                               // Initialize object format
 362         firstfname = NULL;                              // Initialize first filename
 363         err_fd = ERROUT;                                // Initialize error file descriptor
 364         err_flag = 0;                                   // Initialize error flag
 365         rgpu = 0;                                               // Initialize GPU assembly flag
 366         rdsp = 0;                                               // Initialize DSP assembly flag
 367         robjproc = 0;                                   // Initialize OP assembly flag
 368         lsym_flag = 1;                                  // Include local symbols in object file
 369         dsym_flag = 0;                                  // No debug sym generation by default
 370         orgactive = 0;                                  // Not in RISC org section
 371         orgwarning = 0;                                 // No ORG warning issued
 372         segpadsize = 2;                                 // Initialize segment padding size
 373     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 374     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 375         m6502 = 0;                                              // 6502 mode off by default
 376         regbase = reg68base;                    // Initialise DFA register tables
 377         regtab = reg68tab;                              // Idem
 378         regcheck = reg68check;                  // Idem
 379         regaccept = reg68accept;                // Idem
 380     correctMathRules = 0;                       // respect operator precedence
 381         used_architectures = 0;                 // Initialise used architectures bitfield
 382         // Initialize modules
 383         InitSymbolTable();                              // Symbol table
 384         InitTokenizer();                                // Tokenizer
 385         InitLineProcessor();                    // Line processor
 386         InitExpression();                               // Expression analyzer
 387         InitSection();                                  // Section manager / code generator
 388         InitMark();                                             // Mark tape-recorder
 389         InitMacro();                                    // Macro processor
 390         InitListing();                                  // Listing generator
 391         Init6502();                                             // 6502 assembler
 392
 393         // Process command line arguments and assemble source files
 394         for(argno=0; argno<argc; argno++)
 395         {
 396                 if (*argv[argno] == '-')
 397                 {
 398                         switch (argv[argno][1])
 399                         {
 400                         case '4':
 401                                 correctMathRules = 1;
 402                                 break;
 403                         case 'd':                               // Define symbol
 404                         case 'D':
 405                                 for(s=argv[argno]+2; *s!=EOS;)
 406                                 {
 407                                         if (*s++ == '=')
 408                                         {
 409                                                 s[-1] = EOS;
 410                                                 break;
 411                                         }
 412                                 }
 413
 414                                 if (argv[argno][2] == EOS)
 415                                 {
 416                                         printf("-d: empty symbol\n");
 417                                         errcnt++;
 418                                         return errcnt;
 419                                 }
 420
 421                                 sy = lookup(argv[argno] + 2, 0, 0);
 422
 423                                 if (sy == NULL)
 424                                 {
 425                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 426                                         sy->svalue = 0;
 427                                 }
 428
 429                                 sy->sattr = DEFINED | EQUATED | ABS;
 430                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 431                                 break;
 432                         case 'e':                               // Redirect error message output
 433                         case 'E':
 434                                 err_fname = argv[argno] + 2;
 435                                 break;
 436                         case 'f':                               // -f<format>
 437                         case 'F':
 438                                 switch (argv[argno][2])
 439                                 {
 440                                 case EOS:
 441                                 case 'a':                       // -fa = Alcyon [the default]
 442                                 case 'A':
 443                                         obj_format = ALCYON;
 444                                         break;
 445                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 446                                 case 'B':
 447                                         obj_format = BSD;
 448                                         break;
 449                                 case 'c':
 450                                 case 'C':
 451                                         obj_format = C64PRG;
 452                                         break;
 453                                 case 'e':                       // -fe = ELF
 454                                 case 'E':
 455                                         obj_format = ELF;
 456                                         break;
 457                 case 'l':           // -fl = LOD
 458                 case 'L':
 459                     obj_format = LOD;
 460                     break;
 461                 case 'p':           // -fp = P56
 462                 case 'P':
 463                     obj_format = P56;
 464                                         break;
 465                                 case 'x':                       // -fx = COM/EXE/XEX
 466                                 case 'X':
 467                                         obj_format = XEX;
 468                                         break;
 469                 case 'r':           // -fr = Absolute address
 470                 case 'R':
 471                     obj_format = RAW;
 472                     break;
 473                                 default:
 474                                         printf("-f: unknown object format specified\n");
 475                                         errcnt++;
 476                                         return errcnt;
 477                                 }
 478                                 break;
 479                         case 'g':                               // Debugging flag
 480                         case 'G':
 481                                 dsym_flag = 1;
 482                                 break;
 483                         case 'i':                               // Set directory search path
 484                         case 'I':
 485                         {
 486                                 strcat(searchpatha, argv[argno] + 2);
 487                                 strcat(searchpatha, ";");
 488                                 searchpath = searchpatha;
 489
 490                                 // Check to see if include paths actually exist
 491                                 char current_path[256];
 492
 493                                 for(i=current_path_index; nthpath("RMACPATH", i, current_path)!=0; i++)
 494                                 {
 495                                         if (strlen(current_path) > 0)
 496                                         {
 497                                                 DIR * test = opendir(current_path);
 498
 499                                                 if (test == NULL)
 500                                                 {
 501                                                         printf("Invalid include path: %s\n", current_path);
 502                                                         errcnt++;
 503                                                         return errcnt;
 504                                                 }
 505
 506                                                 closedir(test);
 507                                         }
 508                                 }
 509
 510                                 current_path_index = i - 1;
 511                                 break;
 512                         }
 513                         case 'l':                               // Produce listing file
 514                         case 'L':
 515                                 if (*(argv[argno] + 2) == '*')
 516                                 {
 517                                         list_fname = argv[argno] + 3;
 518                                         list_pag = 0;    // Special case - turn off pagination
 519                                 }
 520                                 else
 521                                 {
 522                                         list_fname = argv[argno] + 2;
 523                                 }
 524
 525                                 listing = 1;
 526                                 list_flag = 1;
 527                                 lnsave++;
 528                                 break;
 529                         case 'm':
 530                         case 'M':
 531                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 532                                         d_68000();
 533                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 534                                         d_68020();
 535                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 536                                         d_68030();
 537                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 538                                         d_68040();
 539                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 540                                         d_68060();
 541                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 542                                         d_68881();
 543                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 544                                         d_68882();
 545                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 546                                         d_56001();
 547                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 548                                         d_6502();
 549                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 550                                         d_gpu();
 551                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 552                                         d_dsp();
 553                                 else
 554                                 {
 555                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 556                                         errcnt++;
 557                                         return errcnt;
 558                                 }
 559                                 break;
 560                         case 'o':                               // Direct object file output
 561                         case 'O':
 562                                 if (argv[argno][2] != EOS)
 563                                         objfname = argv[argno] + 2;
 564                                 else
 565                                 {
 566                                         if (++argno >= argc)
 567                                         {
 568                                                 printf("Missing argument to -o");
 569                                                 errcnt++;
 570                                                 return errcnt;
 571                                         }
 572
 573                                         objfname = argv[argno];
 574                                 }
 575
 576                                 break;
 577                         case 'p':               /* -p: generate ".PRG" executable output */
 578                         case 'P':
 579                                 /*
 580                                  * -p           .PRG generation w/o symbols
 581                                  * -ps          .PRG generation with symbols
 582                                  * -px          .PRG generation with extended symbols
 583                                  */
 584                                 switch (argv[argno][2])
 585                                 {
 586                                         case EOS:
 587                                                 prg_flag = 1;
 588                                                 break;
 589
 590                                         case 's':
 591                                         case 'S':
 592                                                 prg_flag = 2;
 593                                                 break;
 594
 595                                         case 'x':
 596                                         case 'X':
 597                                                 prg_flag = 3;
 598                                                 break;
 599
 600                                         default:
 601                                                 printf("-p: syntax error\n");
 602                                                 errcnt++;
 603                                                 return errcnt;
 604                                 }
 605
 606                                 // Enforce Alcyon object format - kind of silly
 607                                 // to ask for .prg output without it!
 608                                 obj_format = ALCYON;
 609                                 break;
 610                         case 'r':                               // Pad seg to requested boundary size
 611                         case 'R':
 612                                 switch(argv[argno][2])
 613                                 {
 614                                 case 'w': case 'W': segpadsize = 2;  break;
 615                                 case 'l': case 'L': segpadsize = 4;  break;
 616                                 case 'p': case 'P': segpadsize = 8;  break;
 617                                 case 'd': case 'D': segpadsize = 16; break;
 618                                 case 'q': case 'Q': segpadsize = 32; break;
 619                                 default: segpadsize = 2; break; // Effective autoeven();
 620                                 }
 621                                 break;
 622                         case 's':                               // Warn about possible short branches and applied optimisations
 623                         case 'S':
 624                                 optim_warn_flag = 1;
 625                                 break;
 626                         case 'u':                               // Make undefined symbols .globl
 627                         case 'U':
 628                                 glob_flag = 1;
 629                                 break;
 630                         case 'v':                               // Verbose flag
 631                         case 'V':
 632                                 verb_flag++;
 633
 634                                 if (verb_flag > 1)
 635                                         DisplayVersion();
 636
 637                                 break;
 638                         case 'x':                               // Turn on debugging
 639                         case 'X':
 640                                 debug = 1;
 641                                 printf("~ Debugging ON\n");
 642                                 break;
 643                         case 'y':                               // -y<pagelen>
 644                         case 'Y':
 645                                 pagelen = atoi(argv[argno] + 2);
 646
 647                                 if (pagelen < 10)
 648                                 {
 649                                         printf("-y: bad page length\n");
 650                                         errcnt++;
 651                                         return errcnt;
 652                                 }
 653
 654                                 break;
 655                         case EOS:                               // Input is stdin
 656                                 ProcessFile(0, NULL);
 657                                 break;
 658                         case 'h':                               // Display command line usage
 659                         case 'H':
 660                         case '?':
 661                                 DisplayVersion();
 662                                 DisplayHelp();
 663                                 errcnt++;
 664                                 break;
 665                         case 'n':                               // Turn off legacy mode
 666                         case 'N':
 667                                 legacy_flag = 0;
 668                                 printf("Legacy mode OFF\n");
 669                                 break;
 670                         default:
 671                                 DisplayVersion();
 672                                 printf("Unknown switch: %s\n\n", argv[argno]);
 673                                 DisplayHelp();
 674                                 errcnt++;
 675                                 break;
 676                         }
 677                 }
 678                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 679                 {
 680                         if (ParseOptimization(argv[argno]) != OK)
 681                         {
 682                                 DisplayVersion();
 683                                 printf("Unknown switch: %s\n\n", argv[argno]);
 684                                 DisplayHelp();
 685                                 errcnt++;
 686                                 break;
 687                         }
 688                 }
 689                 else
 690                 {
 691                         strcpy(fnbuf, argv[argno]);
 692                         fext(fnbuf, ".s", 0);
 693                         fd = open(fnbuf, 0);
 694
 695                         if (fd < 0)
 696                         {
 697                                 printf("Cannot open: %s\n", fnbuf);
 698                                 errcnt++;
 699                                 continue;
 700                         }
 701
 702                         ProcessFile(fd, fnbuf);
 703                 }
 704         }
 705
 706         // Wind-up processing;
 707         // o  save current section (no more code generation)
 708         // o  do auto-even of all sections (or boundary alignment as requested
 709         //    through '-r')
 710     // o  save the last pc value for 6502 (if we used 6502 at all) and
 711     //    detemine if the last section contains anything
 712         // o  determine name of object file:
 713         //    -  "foo.o" for linkable output;
 714         //    -  "foo.prg" for GEMDOS executable (-p flag).
 715         SaveSection();
 716         int temp_section = cursect;
 717
 718         for(i=TEXT; i<=BSS; i<<=1)
 719         {
 720                 SwitchSection(i);
 721
 722                 switch(segpadsize)
 723                 {
 724                 case 2:  d_even();    break;
 725                 case 4:  d_long();    break;
 726                 case 8:  d_phrase();  break;
 727                 case 16: d_dphrase(); break;
 728                 case 32: d_qphrase(); break;
 729                 }
 730
 731                 SaveSection();
 732         }
 733
 734         SwitchSection(M6502);
 735
 736         if (sloc != currentorg[0])
 737         {
 738                 currentorg[1] = sloc;
 739                 currentorg += 2;
 740         }
 741
 742         // This looks like an awful kludge...  !!! FIX !!!
 743         if (temp_section & (M56001P | M56001X | M56001Y))
 744         {
 745                 SwitchSection(temp_section);
 746
 747                 if (chptr != dsp_currentorg->start)
 748                 {
 749                         dsp_currentorg->end = chptr;
 750                         dsp_currentorg++;
 751                 }
 752         }
 753
 754         SwitchSection(TEXT);
 755
 756         if (objfname == NULL)
 757         {
 758                 if (firstfname == NULL)
 759                         firstfname = defname;
 760
 761                 // It's the size of fnbuf minus 5 because of the possible 4 char suffix
 762                 // + trailing null (added by fext()).
 763                 strncpy(fnbuf, firstfname, sizeof(fnbuf) - 5);
 764                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 765                 objfname = fnbuf;
 766         }
 767
 768         // With one pass finished, go back and:
 769         // (1)   run through all the fixups and resolve forward references;
 770         // (1.5) ensure that remaining fixups can be handled by the linker
 771         //       (`lo68' format, extended (postfix) format....)
 772         // (2)   generate the output file image and symbol table;
 773         // (3)   generate relocation information from left-over fixups.
 774         ResolveAllFixups();                                             // Do all fixups
 775         StopMark();                                                             // Stop mark tape-recorder
 776
 777         if (errcnt == 0)
 778         {
 779                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 780                         CantCreateFile(objfname);
 781
 782                 if (verb_flag)
 783                 {
 784                         s = (prg_flag ? "executable" : "object");
 785                         printf("[Writing %s file: %s]\n", s, objfname);
 786                 }
 787
 788                 WriteObject(fd);
 789                 close(fd);
 790
 791                 if (errcnt != 0)
 792                         unlink(objfname);
 793         }
 794
 795         if (list_flag)
 796         {
 797                 if (verb_flag)
 798                         printf("[Wrapping-up listing file]\n");
 799
 800                 listing = 1;
 801                 symtable();
 802                 close(list_fd);
 803         }
 804
 805         if (err_flag)
 806                 close(err_fd);
 807
 808         DEBUG dump_everything();
 809
 810         return errcnt;
 811 }
 812
 813 //
 814 // Determine processor endianess
 815 //
 816 int GetEndianess(void)
 817 {
 818         int i = 1;
 819         char * p = (char *)&i;
 820
 821         if (p[0] == 1)
 822                 return 0;
 823
 824         return 1;
 825 }
 826
 827 //
 828 // Application entry point
 829 //
 830 int main(int argc, char ** argv)
 831 {
 832         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 833         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 834         optim_flags[OPT_56K_SHORT] = 1; // This ensures compatibilty with Motorola's 56k assembler
 835
 836         cmdlnexec = argv[0];                    // Obtain executable name
 837         endian = GetEndianess();                // Get processor endianess
 838
 839         // If commands were passed in, process them
 840         if (argc > 1)
 841                 return Process(argc - 1, argv + 1);
 842
 843         DisplayVersion();
 844         DisplayHelp();
 845
 846         return 0;
 847 }