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