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