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

   1 //
   2 // RMAC - Reboot's Macro Assembler for all Atari computers
   3 // RMAC.C - Main Application Code
   4 // Copyright (C) 199x Landon Dyer, 2011-2020 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 as68_flag;                                  // as68 kludge mode
  33 int glob_flag;                                  // Assume undefined symbols are global
  34 int lsym_flag;                                  // Include local symbols in object file
  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 regbank;                                    // RISC register bank
  48 int segpadsize;                                 // Segment padding size
  49 int endian;                                             // Host processor endianess (0 = LE, 1 = BE)
  50 char * objfname;                                // Object filename pointer
  51 char * firstfname;                              // First source filename
  52 char * cmdlnexec;                               // Executable name, pointer to ARGV[0]
  53 char searchpath[512] = { 0 };   // Search path for include files
  54 char defname[] = "noname.o";    // Default output filename
  55 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  56 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  57 int activefpu = FPU_NONE;               // Active FPU (none by default)
  58 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  59 uint32_t org68k_address;                // .org for 68k
  60
  61 //
  62 // Convert a string to uppercase
  63 //
  64 void strtoupper(char * s)
  65 {
  66         while (*s)
  67                 *s++ &= 0xDF;
  68 }
  69
  70
  71 //
  72 // Manipulate file extension.
  73 //
  74 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  75 // nonzero, any old extension is removed. If the file does not already have an
  76 // extension, 'extension' is appended to the filename.
  77 //
  78 char * fext(char * name, char * extension, int stripp)
  79 {
  80         char * s;
  81
  82         // Find beginning of "real" name (strip off path)
  83         char * beg = strrchr(name, SLASHCHAR);
  84
  85         if (beg == NULL)
  86                 beg = name;
  87
  88         // Clobber any old extension, if requested
  89         if (stripp)
  90         {
  91                 for(s=beg; *s && *s!='.'; ++s)
  92                         ;
  93
  94                 *s = '\0';
  95         }
  96
  97         if (strrchr(beg, '.') == NULL)
  98                 strcat(beg, extension);
  99
 100         return name;
 101 }
 102
 103
 104 //
 105 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 106 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 107 // nth path doesn't exist.
 108 //
 109 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 110 //
 111 int nthpath(char * env_var, int itemno, char * buf)
 112 {
 113         char * s = searchpath;
 114
 115         if (s == NULL)
 116                 s = getenv(env_var);
 117
 118         if (s == NULL)
 119                 return 0;
 120
 121         while (itemno--)
 122                 while (*s != EOS && *s++ != ';')
 123                         ;
 124
 125         if (*s == EOS)
 126                 return 0;
 127
 128         while (*s != EOS && *s != ';')
 129                 *buf++ = *s++;
 130
 131         *buf++ = EOS;
 132
 133         return 1;
 134 }
 135
 136
 137 //
 138 // Display command line help
 139 //
 140 void DisplayHelp(void)
 141 {
 142         printf("Usage:\n"
 143                 "    %s [options] srcfile\n"
 144                 "\n"
 145                 "Options:\n"
 146                 "  -? or -h          Display usage information\n"
 147                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 148                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 149                 "  -f[format]        Output object file format\n"
 150                 "                    a: ALCYON\n"
 151                 "                    b: BSD (use this for Jaguar)\n"
 152                 "                    e: ELF\n"
 153                 "                    p: P56 (use this for DSP56001 only)\n"
 154                 "                    l: LOD (use this for DSP56001 only)\n"
 155                 "                    x: com/exe/xex (Atari 800)\n"
 156                 "                    r: absolute address\n"
 157                 "  -i[path]          Directory to search for include files\n"
 158                 "  -l[filename]      Create an output listing file\n"
 159                 "  -l*[filename]     Create an output listing file without pagination\n"
 160                 "  -m[cpu]           Select default CPU. Available options:\n"
 161                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 162                 "  -n                Don't do things behind your back in RISC assembler\n"
 163                 "  -o file           Output file name\n"
 164                 "  +o[value]         Turn a specific optimisation on\n"
 165                 "                    Available optimisation values and default settings:\n"
 166                 "                    o0: Absolute long addresses to word               (on)\n"
 167                 "                    o1: move.l #x,dn/an to moveq                      (on)\n"
 168                 "                    o2: Word branches to short                        (on)\n"
 169                 "                    o3: Outer displacement 0(an) to (an)              (off)\n"
 170                 "                    o4: lea size(An),An to addq #size,An              (off)\n"
 171                 "                    o5: 68020+ Absolute long base/outer disp. to word (off)\n"
 172                 "                    o6: Null branches to NOP                          (off)\n"
 173                 "                    o7: clr.l Dx to moveq #0,Dx                       (off)\n"
 174                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy              (off)\n"
 175                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy                (off)\n"
 176                 "                    op: Enforce PC relative                           (off)\n"
 177                 "  ~o[value]         Turn a specific optimisation off\n"
 178                 "  +oall             Turn all optimisations on\n"
 179                 "  ~oall             Turn all optimisations off\n"
 180                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 181                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 182                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 183                 "  -r[size]          Pad segments to boundary size specified\n"
 184                 "                    w: word (2 bytes, default alignment)\n"
 185                 "                    l: long (4 bytes)\n"
 186                 "                    p: phrase (8 bytes)\n"
 187                 "                    d: double phrase (16 bytes)\n"
 188                 "                    q: quad phrase (32 bytes)\n"
 189                 "  -s                Warn about possible short branches\n"
 190                 "                    and applied optimisations\n"
 191                 "  -u                Force referenced and undefined symbols global\n"
 192                 "  -v                Set verbose mode\n"
 193                 "  -x                Turn on debugging mode\n"
 194                 "  -y[pagelen]       Set page line length (default: 61)\n"
 195                 "\n", cmdlnexec);
 196 }
 197
 198
 199 //
 200 // Display version information
 201 //
 202 void DisplayVersion(void)
 203 {
 204         printf("\n"
 205                 " _ __ _ __ ___   __ _  ___ \n"
 206                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 207                 "| |  | | | | | | (_| | (__ \n"
 208                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 209                 "\nReboot's Macro Assembler\n"
 210                 "Copyright (C) 199x Landon Dyer, 2011-2020 Reboot\n"
 211                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 212 }
 213
 214
 215 //
 216 // Parse optimisation options
 217 //
 218 int ParseOptimization(char * optstring)
 219 {
 220         int onoff = 0;
 221
 222         while (*optstring)
 223         {
 224                 if (*optstring == '+')
 225                         onoff = 1;
 226                 else if (*optstring != '~')
 227                         return ERROR;
 228
 229                 if ((optstring[2] == 'a' || optstring[2] == 'A')
 230                         && (optstring[3] == 'l' || optstring[3] == 'L')
 231                         && (optstring[4] == 'l' || optstring[4] == 'L'))
 232                 {
 233                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 234                         optstring += 5;
 235                 }
 236                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 237                 {
 238                         if (optstring[2] == 'p' || optstring[2] == 'P')
 239                         {
 240                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 241                                 optstring += 3;
 242                         }
 243                         else
 244                         {
 245                                 int opt_no = atoi(&optstring[2]);
 246
 247                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 248                                 {
 249                                         optim_flags[opt_no] = onoff;
 250                                         optstring += 3;
 251
 252                                         // If opt_no is 2 digits then consume an extra character.
 253                                         // Sounds a bit sleazy but we know we're not going to hit
 254                                         // more than 100 optimisation switches so this should be
 255                                         // fine. If we do hit that number then it'll probably be
 256                                         // time to burn the whole codebase and start from scratch.
 257                                         if (opt_no > 9)
 258                                                 optstring++;
 259                                 }
 260                                 else
 261                                         return ERROR;
 262                         }
 263                 }
 264                 else
 265                 {
 266                         return ERROR;
 267                 }
 268
 269                 if (*optstring == ',')
 270                         optstring++;
 271         }
 272         return OK;
 273 }
 274
 275
 276 //
 277 // Process command line arguments and do an assembly
 278 //
 279 int Process(int argc, char ** argv)
 280 {
 281         int argno;                                              // Argument number
 282         SYM * sy;                                               // Pointer to a symbol record
 283         char * s;                                               // String pointer
 284         int fd;                                                 // File descriptor
 285         char fnbuf[FNSIZ];                              // Filename buffer
 286         int i;                                                  // Iterator
 287         int current_path_index = 0;             // Iterator for search paths
 288
 289         errcnt = 0;                                             // Initialize error count
 290         listing = 0;                                    // Initialize listing level
 291         list_flag = 0;                                  // Initialize listing flag
 292         verb_flag = perm_verb_flag;             // Initialize verbose flag
 293         as68_flag = 0;                                  // Initialize as68 kludge mode
 294         glob_flag = 0;                                  // Initialize .globl flag
 295         optim_warn_flag = 0;                    // Initialize short branch flag
 296         debug = 0;                                              // Initialize debug flag
 297         objfname = NULL;                                // Initialize object filename
 298         list_fname = NULL;                              // Initialize listing filename
 299         err_fname = NULL;                               // Initialize error filename
 300         obj_format = BSD;                               // Initialize object format
 301         firstfname = NULL;                              // Initialize first filename
 302         err_fd = ERROUT;                                // Initialize error file descriptor
 303         err_flag = 0;                                   // Initialize error flag
 304         rgpu = 0;                                               // Initialize GPU assembly flag
 305         rdsp = 0;                                               // Initialize DSP assembly flag
 306         robjproc = 0;                                   // Initialize OP assembly flag
 307         lsym_flag = 1;                                  // Include local symbols in object file
 308         regbank = BANK_N;                               // No RISC register bank specified
 309         orgactive = 0;                                  // Not in RISC org section
 310         orgwarning = 0;                                 // No ORG warning issued
 311         segpadsize = 2;                                 // Initialize segment padding size
 312     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 313     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 314         m6502 = 0;                                              // 6502 mode off by default
 315
 316         // Initialize modules
 317         InitSymbolTable();                              // Symbol table
 318         InitTokenizer();                                // Tokenizer
 319         InitLineProcessor();                    // Line processor
 320         InitExpression();                               // Expression analyzer
 321         InitSection();                                  // Section manager / code generator
 322         InitMark();                                             // Mark tape-recorder
 323         InitMacro();                                    // Macro processor
 324         InitListing();                                  // Listing generator
 325         Init6502();                                             // 6502 assembler
 326
 327         // Process command line arguments and assemble source files
 328         for(argno=0; argno<argc; argno++)
 329         {
 330                 if (*argv[argno] == '-')
 331                 {
 332                         switch (argv[argno][1])
 333                         {
 334                         case 'd':                               // Define symbol
 335                         case 'D':
 336                                 for(s=argv[argno]+2; *s!=EOS;)
 337                                 {
 338                                         if (*s++ == '=')
 339                                         {
 340                                                 s[-1] = EOS;
 341                                                 break;
 342                                         }
 343                                 }
 344
 345                                 if (argv[argno][2] == EOS)
 346                                 {
 347                                         printf("-d: empty symbol\n");
 348                                         errcnt++;
 349                                         return errcnt;
 350                                 }
 351
 352                                 sy = lookup(argv[argno] + 2, 0, 0);
 353
 354                                 if (sy == NULL)
 355                                 {
 356                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 357                                         sy->svalue = 0;
 358                                 }
 359
 360                                 sy->sattr = DEFINED | EQUATED | ABS;
 361                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 362                                 break;
 363                         case 'e':                               // Redirect error message output
 364                         case 'E':
 365                                 err_fname = argv[argno] + 2;
 366                                 break;
 367                         case 'f':                               // -f<format>
 368                         case 'F':
 369                                 switch (argv[argno][2])
 370                                 {
 371                                 case EOS:
 372                                 case 'a':                       // -fa = Alcyon [the default]
 373                                 case 'A':
 374                                         obj_format = ALCYON;
 375                                         break;
 376                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 377                                 case 'B':
 378                                         obj_format = BSD;
 379                                         break;
 380                                 case 'e':                       // -fe = ELF
 381                                 case 'E':
 382                                         obj_format = ELF;
 383                                         break;
 384                 case 'l':           // -fl = LOD
 385                 case 'L':
 386                     obj_format = LOD;
 387                     break;
 388                 case 'p':           // -fp = P56
 389                 case 'P':
 390                     obj_format = P56;
 391                                         break;
 392                                 case 'x':                       // -fx = COM/EXE/XEX
 393                                 case 'X':
 394                                         obj_format = XEX;
 395                                         break;
 396                 case 'r':           // -fr = Absolute address
 397                 case 'R':
 398                     obj_format = RAW;
 399                     break;
 400                                 default:
 401                                         printf("-f: unknown object format specified\n");
 402                                         errcnt++;
 403                                         return errcnt;
 404                                 }
 405                                 break;
 406                         case 'g':                               // Debugging flag
 407                         case 'G':
 408                                 printf("Debugging flag (-g) not yet implemented\n");
 409                                 break;
 410                         case 'i':                               // Set directory search path
 411                         case 'I':
 412                         {
 413                                 strcat(searchpath, argv[argno] + 2);
 414                 strcat(searchpath, ";");
 415
 416                                 // Check to see if include paths actually exist
 417                                 char current_path[256];
 418                                 for (i = current_path_index; nthpath("RMACPATH", i, current_path) != 0; i++)
 419                                 {
 420                                         if (strlen(current_path) > 0)
 421                                         {
 422                                                 DIR* test = opendir(current_path);
 423
 424                                                 if (test == NULL)
 425                                                 {
 426                                                         printf("Invalid include path: %s\n", current_path);
 427                                                         errcnt++;
 428                                                         return errcnt;
 429                                                 }
 430
 431                                                 closedir(test);
 432                                         }
 433                                 }
 434                                 current_path_index = i-1;
 435                                 break;
 436                         }
 437                         case 'l':                               // Produce listing file
 438                         case 'L':
 439                                 if (*(argv[argno] + 2) == '*')
 440                                 {
 441                                         list_fname = argv[argno] + 3;
 442                                         list_pag = 0;    // Special case - turn off pagination
 443                                 }
 444                                 else
 445                                 {
 446                                         list_fname = argv[argno] + 2;
 447                                 }
 448
 449                                 listing = 1;
 450                                 list_flag = 1;
 451                                 lnsave++;
 452                                 break;
 453                         case 'm':
 454                         case 'M':
 455                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 456                                         d_68000();
 457                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 458                                         d_68020();
 459                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 460                                         d_68030();
 461                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 462                                         d_68040();
 463                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 464                                         d_68060();
 465                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 466                                         d_68881();
 467                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 468                                         d_68882();
 469                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 470                                         d_56001();
 471                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 472                                         d_6502();
 473                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 474                                         d_gpu();
 475                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 476                                         d_dsp();
 477                                 else
 478                                 {
 479                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 480                                         errcnt++;
 481                                         return errcnt;
 482                                 }
 483                                 break;
 484                         case 'o':                               // Direct object file output
 485                         case 'O':
 486                                 if (argv[argno][2] != EOS)
 487                                         objfname = argv[argno] + 2;
 488                                 else
 489                                 {
 490                                         if (++argno >= argc)
 491                                         {
 492                                                 printf("Missing argument to -o");
 493                                                 errcnt++;
 494                                                 return errcnt;
 495                                         }
 496
 497                                         objfname = argv[argno];
 498                                 }
 499
 500                                 break;
 501                         case 'p':               /* -p: generate ".PRG" executable output */
 502                         case 'P':
 503                                 /*
 504                                  * -p           .PRG generation w/o symbols
 505                                  * -ps          .PRG generation with symbols
 506                                  * -px          .PRG generation with extended symbols
 507                                  */
 508                                 switch (argv[argno][2])
 509                                 {
 510                                         case EOS:
 511                                                 prg_flag = 1;
 512                                                 break;
 513
 514                                         case 's':
 515                                         case 'S':
 516                                                 prg_flag = 2;
 517                                                 break;
 518
 519                                         case 'x':
 520                                         case 'X':
 521                                                 prg_flag = 3;
 522                                                 break;
 523
 524                                         default:
 525                                                 printf("-p: syntax error\n");
 526                                                 errcnt++;
 527                                                 return errcnt;
 528                                 }
 529
 530                                 // Enforce Alcyon object format - kind of silly
 531                                 // to ask for .prg output without it!
 532                                 obj_format = ALCYON;
 533                                 break;
 534                         case 'r':                               // Pad seg to requested boundary size
 535                         case 'R':
 536                                 switch(argv[argno][2])
 537                                 {
 538                                 case 'w': case 'W': segpadsize = 2;  break;
 539                                 case 'l': case 'L': segpadsize = 4;  break;
 540                                 case 'p': case 'P': segpadsize = 8;  break;
 541                                 case 'd': case 'D': segpadsize = 16; break;
 542                                 case 'q': case 'Q': segpadsize = 32; break;
 543                                 default: segpadsize = 2; break; // Effective autoeven();
 544                                 }
 545                                 break;
 546                         case 's':                               // Warn about possible short branches and applied optimisations
 547                         case 'S':
 548                                 optim_warn_flag = 1;
 549                                 break;
 550                         case 'u':                               // Make undefined symbols .globl
 551                         case 'U':
 552                                 glob_flag = 1;
 553                                 break;
 554                         case 'v':                               // Verbose flag
 555                         case 'V':
 556                                 verb_flag++;
 557
 558                                 if (verb_flag > 1)
 559                                         DisplayVersion();
 560
 561                                 break;
 562                         case 'x':                               // Turn on debugging
 563                         case 'X':
 564                                 debug = 1;
 565                                 printf("~ Debugging ON\n");
 566                                 break;
 567                         case 'y':                               // -y<pagelen>
 568                         case 'Y':
 569                                 pagelen = atoi(argv[argno] + 2);
 570
 571                                 if (pagelen < 10)
 572                                 {
 573                                         printf("-y: bad page length\n");
 574                                         errcnt++;
 575                                         return errcnt;
 576                                 }
 577
 578                                 break;
 579                         case EOS:                               // Input is stdin
 580                                 if (firstfname == NULL) // Kludge first filename
 581                                         firstfname = defname;
 582
 583                                 include(0, "(stdin)");
 584                                 Assemble();
 585                                 break;
 586                         case 'h':                               // Display command line usage
 587                         case 'H':
 588                         case '?':
 589                                 DisplayVersion();
 590                                 DisplayHelp();
 591                                 errcnt++;
 592                                 break;
 593                         case 'n':                               // Turn off legacy mode
 594                         case 'N':
 595                                 legacy_flag = 0;
 596                                 printf("Legacy mode OFF\n");
 597                                 break;
 598                         default:
 599                                 DisplayVersion();
 600                                 printf("Unknown switch: %s\n\n", argv[argno]);
 601                                 DisplayHelp();
 602                                 errcnt++;
 603                                 break;
 604                         }
 605                 }
 606                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 607                 {
 608                         if (ParseOptimization(argv[argno]) != OK)
 609                         {
 610                                 DisplayVersion();
 611                                 printf("Unknown switch: %s\n\n", argv[argno]);
 612                                 DisplayHelp();
 613                                 errcnt++;
 614                                 break;
 615                         }
 616                 }
 617                 else
 618                 {
 619                         // Record first filename.
 620                         if (firstfname == NULL)
 621                                 firstfname = argv[argno];
 622
 623                         strcpy(fnbuf, argv[argno]);
 624                         fext(fnbuf, ".s", 0);
 625                         fd = open(fnbuf, 0);
 626
 627                         if (fd < 0)
 628                         {
 629                                 printf("Cannot open: %s\n", fnbuf);
 630                                 errcnt++;
 631                                 continue;
 632                         }
 633
 634                         include(fd, fnbuf);
 635                         Assemble();
 636                 }
 637         }
 638
 639         // Wind-up processing;
 640         // o  save current section (no more code generation)
 641         // o  do auto-even of all sections (or boundary alignment as requested
 642         //    through '-r')
 643     // o  save the last pc value for 6502 (if we used 6502 at all) and
 644     //    detemine if the last section contains anything
 645         // o  determine name of object file:
 646         //    -  "foo.o" for linkable output;
 647         //    -  "foo.prg" for GEMDOS executable (-p flag).
 648         SaveSection();
 649         int temp_section = cursect;
 650
 651         for(i=TEXT; i<=BSS; i<<=1)
 652         {
 653                 SwitchSection(i);
 654
 655                 switch(segpadsize)
 656                 {
 657                 case 2:  d_even();    break;
 658                 case 4:  d_long();    break;
 659                 case 8:  d_phrase();  break;
 660                 case 16: d_dphrase(); break;
 661                 case 32: d_qphrase(); break;
 662                 }
 663
 664                 SaveSection();
 665         }
 666
 667         SwitchSection(M6502);
 668
 669         if (sloc != currentorg[0])
 670         {
 671                 currentorg[1] = sloc;
 672                 currentorg += 2;
 673         }
 674
 675         // This looks like an awful kludge...  !!! FIX !!!
 676         if (temp_section & (M56001P | M56001X | M56001Y))
 677         {
 678                 SwitchSection(temp_section);
 679
 680                 if (chptr != dsp_currentorg->start)
 681                 {
 682                         dsp_currentorg->end = chptr;
 683                         dsp_currentorg++;
 684                 }
 685         }
 686
 687         SwitchSection(TEXT);
 688
 689         if (objfname == NULL)
 690         {
 691                 if (firstfname == NULL)
 692                         firstfname = defname;
 693
 694                 strcpy(fnbuf, firstfname);
 695                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 696                 objfname = fnbuf;
 697         }
 698
 699         // With one pass finished, go back and:
 700         // (1)   run through all the fixups and resolve forward references;
 701         // (1.5) ensure that remaining fixups can be handled by the linker
 702         //       (`lo68' format, extended (postfix) format....)
 703         // (2)   generate the output file image and symbol table;
 704         // (3)   generate relocation information from left-over fixups.
 705         ResolveAllFixups();                                             // Do all fixups
 706         StopMark();                                                             // Stop mark tape-recorder
 707
 708         if (errcnt == 0)
 709         {
 710                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 711                         CantCreateFile(objfname);
 712
 713                 if (verb_flag)
 714                 {
 715                         s = (prg_flag ? "executable" : "object");
 716                         printf("[Writing %s file: %s]\n", s, objfname);
 717                 }
 718
 719                 WriteObject(fd);
 720                 close(fd);
 721
 722                 if (errcnt != 0)
 723                         unlink(objfname);
 724         }
 725
 726         if (list_flag)
 727         {
 728                 if (verb_flag)
 729                         printf("[Wrapping-up listing file]\n");
 730
 731                 listing = 1;
 732                 symtable();
 733                 close(list_fd);
 734         }
 735
 736         if (err_flag)
 737                 close(err_fd);
 738
 739         DEBUG dump_everything();
 740
 741         return errcnt;
 742 }
 743
 744
 745 //
 746 // Determine processor endianess
 747 //
 748 int GetEndianess(void)
 749 {
 750         int i = 1;
 751         char * p = (char *)&i;
 752
 753         if (p[0] == 1)
 754                 return 0;
 755
 756         return 1;
 757 }
 758
 759
 760 //
 761 // Application entry point
 762 //
 763 int main(int argc, char ** argv)
 764 {
 765         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 766         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 767
 768         // Set legacy optimisation flags to on and everything else to off
 769         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 770         optim_flags[OPT_ABS_SHORT] =
 771                 optim_flags[OPT_MOVEL_MOVEQ] =
 772                 optim_flags[OPT_BSR_BCC_S] = 1;
 773
 774         cmdlnexec = argv[0];                    // Obtain executable name
 775         endian = GetEndianess();                // Get processor endianess
 776
 777         // If commands were passed in, process them
 778         if (argc > 1)
 779                 return Process(argc - 1, argv + 1);
 780
 781         DisplayVersion();
 782         DisplayHelp();
 783
 784         return 0;
 785 }
 786