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 searchpatha[512] = { 0 };  // Buffer to hold searchpath when specified
  54 char * searchpath = NULL;               // Search path for include files
  55 char defname[] = "noname.o";    // Default output filename
  56 int optim_flags[OPT_COUNT];             // Specific optimisations on/off matrix
  57 int activecpu = CPU_68000;              // Active 68k CPU (68000 by default)
  58 int activefpu = FPU_NONE;               // Active FPU (none by default)
  59 int org68k_active = 0;                  // .org switch for 68k (only with RAW output format)
  60 uint32_t org68k_address;                // .org for 68k
  61
  62 //
  63 // Convert a string to uppercase
  64 //
  65 void strtoupper(char * s)
  66 {
  67         while (*s)
  68                 *s++ &= 0xDF;
  69 }
  70
  71
  72 //
  73 // Manipulate file extension.
  74 //
  75 // 'name' must be large enough to hold any possible filename. If 'stripp' is
  76 // nonzero, any old extension is removed. If the file does not already have an
  77 // extension, 'extension' is appended to the filename.
  78 //
  79 char * fext(char * name, char * extension, int stripp)
  80 {
  81         char * s;
  82
  83         // Find beginning of "real" name (strip off path)
  84         char * beg = strrchr(name, SLASHCHAR);
  85
  86         if (beg == NULL)
  87                 beg = name;
  88
  89         // Clobber any old extension, if requested
  90         if (stripp)
  91         {
  92                 for(s=beg; *s && *s!='.'; ++s)
  93                         ;
  94
  95                 *s = '\0';
  96         }
  97
  98         if (strrchr(beg, '.') == NULL)
  99                 strcat(beg, extension);
 100
 101         return name;
 102 }
 103
 104
 105 //
 106 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 107 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 108 // nth path doesn't exist.
 109 //
 110 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 111 //
 112 int nthpath(char * env_var, int itemno, char * buf)
 113 {
 114         char * s = searchpath;
 115
 116         if (s == NULL)
 117                 s = getenv(env_var);
 118
 119         if (s == NULL)
 120                 return 0;
 121
 122         while (itemno--)
 123                 while (*s != EOS && *s++ != ';')
 124                         ;
 125
 126         if (*s == EOS)
 127                 return 0;
 128
 129         while (*s != EOS && *s != ';')
 130                 *buf++ = *s++;
 131
 132         *buf++ = EOS;
 133
 134         return 1;
 135 }
 136
 137
 138 //
 139 // Display command line help
 140 //
 141 void DisplayHelp(void)
 142 {
 143         printf("Usage:\n"
 144                 "    %s [options] srcfile\n"
 145                 "\n"
 146                 "Options:\n"
 147                 "  -? or -h          Display usage information\n"
 148                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 149                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 150                 "  -f[format]        Output object file format\n"
 151                 "                    a: ALCYON\n"
 152                 "                    b: BSD (use this for Jaguar)\n"
 153                 "                    e: ELF\n"
 154                 "                    p: P56 (use this for DSP56001 only)\n"
 155                 "                    l: LOD (use this for DSP56001 only)\n"
 156                 "                    x: com/exe/xex (Atari 800)\n"
 157                 "                    r: absolute address\n"
 158                 "  -i[path]          Directory to search for include files\n"
 159                 "  -l[filename]      Create an output listing file\n"
 160                 "  -l*[filename]     Create an output listing file without pagination\n"
 161                 "  -m[cpu]           Select default CPU. Available options:\n"
 162                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 163                 "  -n                Don't do things behind your back in RISC assembler\n"
 164                 "  -o file           Output file name\n"
 165                 "  +o[value]         Turn a specific optimisation on\n"
 166                 "                    Available optimisation values and default settings:\n"
 167                 "                    o0: Absolute long addresses to word               (on)\n"
 168                 "                    o1: move.l #x,dn/an to moveq                      (on)\n"
 169                 "                    o2: Word branches to short                        (on)\n"
 170                 "                    o3: Outer displacement 0(an) to (an)              (off)\n"
 171                 "                    o4: lea size(An),An to addq #size,An              (off)\n"
 172                 "                    o5: 68020+ Absolute long base/outer disp. to word (off)\n"
 173                 "                    o6: Null branches to NOP                          (off)\n"
 174                 "                    o7: clr.l Dx to moveq #0,Dx                       (off)\n"
 175                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy              (off)\n"
 176                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy                (off)\n"
 177                 "                    op: Enforce PC relative                           (off)\n"
 178                 "  ~o[value]         Turn a specific optimisation off\n"
 179                 "  +oall             Turn all optimisations on\n"
 180                 "  ~oall             Turn all optimisations off\n"
 181                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 182                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 183                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 184                 "  -r[size]          Pad segments to boundary size specified\n"
 185                 "                    w: word (2 bytes, default alignment)\n"
 186                 "                    l: long (4 bytes)\n"
 187                 "                    p: phrase (8 bytes)\n"
 188                 "                    d: double phrase (16 bytes)\n"
 189                 "                    q: quad phrase (32 bytes)\n"
 190                 "  -s                Warn about possible short branches\n"
 191                 "                    and applied optimisations\n"
 192                 "  -u                Force referenced and undefined symbols global\n"
 193                 "  -v                Set verbose mode\n"
 194                 "  -x                Turn on debugging mode\n"
 195                 "  -y[pagelen]       Set page line length (default: 61)\n"
 196                 "\n", cmdlnexec);
 197 }
 198
 199
 200 //
 201 // Display version information
 202 //
 203 void DisplayVersion(void)
 204 {
 205         printf("\n"
 206                 " _ __ _ __ ___   __ _  ___ \n"
 207                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 208                 "| |  | | | | | | (_| | (__ \n"
 209                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 210                 "\nReboot's Macro Assembler\n"
 211                 "Copyright (C) 199x Landon Dyer, 2011-2020 Reboot\n"
 212                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 213 }
 214
 215
 216 //
 217 // Parse optimisation options
 218 //
 219 int ParseOptimization(char * optstring)
 220 {
 221         int onoff = 0;
 222
 223         while (*optstring)
 224         {
 225                 if (*optstring == '+')
 226                         onoff = 1;
 227                 else if (*optstring != '~')
 228                         return ERROR;
 229
 230                 if ((optstring[2] == 'a' || optstring[2] == 'A')
 231                         && (optstring[3] == 'l' || optstring[3] == 'L')
 232                         && (optstring[4] == 'l' || optstring[4] == 'L'))
 233                 {
 234                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 235                         optstring += 5;
 236                 }
 237                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 238                 {
 239                         if (optstring[2] == 'p' || optstring[2] == 'P')
 240                         {
 241                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 242                                 optstring += 3;
 243                         }
 244                         else
 245                         {
 246                                 int opt_no = atoi(&optstring[2]);
 247
 248                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 249                                 {
 250                                         optim_flags[opt_no] = onoff;
 251                                         optstring += 3;
 252
 253                                         // If opt_no is 2 digits then consume an extra character.
 254                                         // Sounds a bit sleazy but we know we're not going to hit
 255                                         // more than 100 optimisation switches so this should be
 256                                         // fine. If we do hit that number then it'll probably be
 257                                         // time to burn the whole codebase and start from scratch.
 258                                         if (opt_no > 9)
 259                                                 optstring++;
 260                                 }
 261                                 else
 262                                         return ERROR;
 263                         }
 264                 }
 265                 else
 266                 {
 267                         return ERROR;
 268                 }
 269
 270                 if (*optstring == ',')
 271                         optstring++;
 272         }
 273         return OK;
 274 }
 275
 276
 277 //
 278 // Process command line arguments and do an assembly
 279 //
 280 int Process(int argc, char ** argv)
 281 {
 282         int argno;                                              // Argument number
 283         SYM * sy;                                               // Pointer to a symbol record
 284         char * s;                                               // String pointer
 285         int fd;                                                 // File descriptor
 286         char fnbuf[FNSIZ];                              // Filename buffer
 287         int i;                                                  // Iterator
 288         int current_path_index = 0;             // Iterator for search paths
 289
 290         errcnt = 0;                                             // Initialize error count
 291         listing = 0;                                    // Initialize listing level
 292         list_flag = 0;                                  // Initialize listing flag
 293         verb_flag = perm_verb_flag;             // Initialize verbose flag
 294         as68_flag = 0;                                  // Initialize as68 kludge mode
 295         glob_flag = 0;                                  // Initialize .globl flag
 296         optim_warn_flag = 0;                    // Initialize short branch flag
 297         debug = 0;                                              // Initialize debug flag
 298         objfname = NULL;                                // Initialize object filename
 299         list_fname = NULL;                              // Initialize listing filename
 300         err_fname = NULL;                               // Initialize error filename
 301         obj_format = BSD;                               // Initialize object format
 302         firstfname = NULL;                              // Initialize first filename
 303         err_fd = ERROUT;                                // Initialize error file descriptor
 304         err_flag = 0;                                   // Initialize error flag
 305         rgpu = 0;                                               // Initialize GPU assembly flag
 306         rdsp = 0;                                               // Initialize DSP assembly flag
 307         robjproc = 0;                                   // Initialize OP assembly flag
 308         lsym_flag = 1;                                  // Include local symbols in object file
 309         regbank = BANK_N;                               // No RISC register bank specified
 310         orgactive = 0;                                  // Not in RISC org section
 311         orgwarning = 0;                                 // No ORG warning issued
 312         segpadsize = 2;                                 // Initialize segment padding size
 313     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 314     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 315         m6502 = 0;                                              // 6502 mode off by default
 316
 317         // Initialize modules
 318         InitSymbolTable();                              // Symbol table
 319         InitTokenizer();                                // Tokenizer
 320         InitLineProcessor();                    // Line processor
 321         InitExpression();                               // Expression analyzer
 322         InitSection();                                  // Section manager / code generator
 323         InitMark();                                             // Mark tape-recorder
 324         InitMacro();                                    // Macro processor
 325         InitListing();                                  // Listing generator
 326         Init6502();                                             // 6502 assembler
 327
 328         // Process command line arguments and assemble source files
 329         for(argno=0; argno<argc; argno++)
 330         {
 331                 if (*argv[argno] == '-')
 332                 {
 333                         switch (argv[argno][1])
 334                         {
 335                         case 'd':                               // Define symbol
 336                         case 'D':
 337                                 for(s=argv[argno]+2; *s!=EOS;)
 338                                 {
 339                                         if (*s++ == '=')
 340                                         {
 341                                                 s[-1] = EOS;
 342                                                 break;
 343                                         }
 344                                 }
 345
 346                                 if (argv[argno][2] == EOS)
 347                                 {
 348                                         printf("-d: empty symbol\n");
 349                                         errcnt++;
 350                                         return errcnt;
 351                                 }
 352
 353                                 sy = lookup(argv[argno] + 2, 0, 0);
 354
 355                                 if (sy == NULL)
 356                                 {
 357                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 358                                         sy->svalue = 0;
 359                                 }
 360
 361                                 sy->sattr = DEFINED | EQUATED | ABS;
 362                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 363                                 break;
 364                         case 'e':                               // Redirect error message output
 365                         case 'E':
 366                                 err_fname = argv[argno] + 2;
 367                                 break;
 368                         case 'f':                               // -f<format>
 369                         case 'F':
 370                                 switch (argv[argno][2])
 371                                 {
 372                                 case EOS:
 373                                 case 'a':                       // -fa = Alcyon [the default]
 374                                 case 'A':
 375                                         obj_format = ALCYON;
 376                                         break;
 377                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 378                                 case 'B':
 379                                         obj_format = BSD;
 380                                         break;
 381                                 case 'e':                       // -fe = ELF
 382                                 case 'E':
 383                                         obj_format = ELF;
 384                                         break;
 385                 case 'l':           // -fl = LOD
 386                 case 'L':
 387                     obj_format = LOD;
 388                     break;
 389                 case 'p':           // -fp = P56
 390                 case 'P':
 391                     obj_format = P56;
 392                                         break;
 393                                 case 'x':                       // -fx = COM/EXE/XEX
 394                                 case 'X':
 395                                         obj_format = XEX;
 396                                         break;
 397                 case 'r':           // -fr = Absolute address
 398                 case 'R':
 399                     obj_format = RAW;
 400                     break;
 401                                 default:
 402                                         printf("-f: unknown object format specified\n");
 403                                         errcnt++;
 404                                         return errcnt;
 405                                 }
 406                                 break;
 407                         case 'g':                               // Debugging flag
 408                         case 'G':
 409                                 printf("Debugging flag (-g) not yet implemented\n");
 410                                 break;
 411                         case 'i':                               // Set directory search path
 412                         case 'I':
 413                         {
 414                                 strcat(searchpatha, argv[argno] + 2);
 415                                 strcat(searchpatha, ";");
 416                                 searchpath = searchpatha;
 417
 418                                 // Check to see if include paths actually exist
 419                                 char current_path[256];
 420
 421                                 for(i=current_path_index; nthpath("RMACPATH", i, current_path)!=0; i++)
 422                                 {
 423                                         if (strlen(current_path) > 0)
 424                                         {
 425                                                 DIR * test = opendir(current_path);
 426
 427                                                 if (test == NULL)
 428                                                 {
 429                                                         printf("Invalid include path: %s\n", current_path);
 430                                                         errcnt++;
 431                                                         return errcnt;
 432                                                 }
 433
 434                                                 closedir(test);
 435                                         }
 436                                 }
 437
 438                                 current_path_index = i - 1;
 439                                 break;
 440                         }
 441                         case 'l':                               // Produce listing file
 442                         case 'L':
 443                                 if (*(argv[argno] + 2) == '*')
 444                                 {
 445                                         list_fname = argv[argno] + 3;
 446                                         list_pag = 0;    // Special case - turn off pagination
 447                                 }
 448                                 else
 449                                 {
 450                                         list_fname = argv[argno] + 2;
 451                                 }
 452
 453                                 listing = 1;
 454                                 list_flag = 1;
 455                                 lnsave++;
 456                                 break;
 457                         case 'm':
 458                         case 'M':
 459                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 460                                         d_68000();
 461                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 462                                         d_68020();
 463                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 464                                         d_68030();
 465                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 466                                         d_68040();
 467                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 468                                         d_68060();
 469                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 470                                         d_68881();
 471                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 472                                         d_68882();
 473                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 474                                         d_56001();
 475                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 476                                         d_6502();
 477                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 478                                         d_gpu();
 479                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 480                                         d_dsp();
 481                                 else
 482                                 {
 483                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 484                                         errcnt++;
 485                                         return errcnt;
 486                                 }
 487                                 break;
 488                         case 'o':                               // Direct object file output
 489                         case 'O':
 490                                 if (argv[argno][2] != EOS)
 491                                         objfname = argv[argno] + 2;
 492                                 else
 493                                 {
 494                                         if (++argno >= argc)
 495                                         {
 496                                                 printf("Missing argument to -o");
 497                                                 errcnt++;
 498                                                 return errcnt;
 499                                         }
 500
 501                                         objfname = argv[argno];
 502                                 }
 503
 504                                 break;
 505                         case 'p':               /* -p: generate ".PRG" executable output */
 506                         case 'P':
 507                                 /*
 508                                  * -p           .PRG generation w/o symbols
 509                                  * -ps          .PRG generation with symbols
 510                                  * -px          .PRG generation with extended symbols
 511                                  */
 512                                 switch (argv[argno][2])
 513                                 {
 514                                         case EOS:
 515                                                 prg_flag = 1;
 516                                                 break;
 517
 518                                         case 's':
 519                                         case 'S':
 520                                                 prg_flag = 2;
 521                                                 break;
 522
 523                                         case 'x':
 524                                         case 'X':
 525                                                 prg_flag = 3;
 526                                                 break;
 527
 528                                         default:
 529                                                 printf("-p: syntax error\n");
 530                                                 errcnt++;
 531                                                 return errcnt;
 532                                 }
 533
 534                                 // Enforce Alcyon object format - kind of silly
 535                                 // to ask for .prg output without it!
 536                                 obj_format = ALCYON;
 537                                 break;
 538                         case 'r':                               // Pad seg to requested boundary size
 539                         case 'R':
 540                                 switch(argv[argno][2])
 541                                 {
 542                                 case 'w': case 'W': segpadsize = 2;  break;
 543                                 case 'l': case 'L': segpadsize = 4;  break;
 544                                 case 'p': case 'P': segpadsize = 8;  break;
 545                                 case 'd': case 'D': segpadsize = 16; break;
 546                                 case 'q': case 'Q': segpadsize = 32; break;
 547                                 default: segpadsize = 2; break; // Effective autoeven();
 548                                 }
 549                                 break;
 550                         case 's':                               // Warn about possible short branches and applied optimisations
 551                         case 'S':
 552                                 optim_warn_flag = 1;
 553                                 break;
 554                         case 'u':                               // Make undefined symbols .globl
 555                         case 'U':
 556                                 glob_flag = 1;
 557                                 break;
 558                         case 'v':                               // Verbose flag
 559                         case 'V':
 560                                 verb_flag++;
 561
 562                                 if (verb_flag > 1)
 563                                         DisplayVersion();
 564
 565                                 break;
 566                         case 'x':                               // Turn on debugging
 567                         case 'X':
 568                                 debug = 1;
 569                                 printf("~ Debugging ON\n");
 570                                 break;
 571                         case 'y':                               // -y<pagelen>
 572                         case 'Y':
 573                                 pagelen = atoi(argv[argno] + 2);
 574
 575                                 if (pagelen < 10)
 576                                 {
 577                                         printf("-y: bad page length\n");
 578                                         errcnt++;
 579                                         return errcnt;
 580                                 }
 581
 582                                 break;
 583                         case EOS:                               // Input is stdin
 584                                 if (firstfname == NULL) // Kludge first filename
 585                                         firstfname = defname;
 586
 587                                 include(0, "(stdin)");
 588                                 Assemble();
 589                                 break;
 590                         case 'h':                               // Display command line usage
 591                         case 'H':
 592                         case '?':
 593                                 DisplayVersion();
 594                                 DisplayHelp();
 595                                 errcnt++;
 596                                 break;
 597                         case 'n':                               // Turn off legacy mode
 598                         case 'N':
 599                                 legacy_flag = 0;
 600                                 printf("Legacy mode OFF\n");
 601                                 break;
 602                         default:
 603                                 DisplayVersion();
 604                                 printf("Unknown switch: %s\n\n", argv[argno]);
 605                                 DisplayHelp();
 606                                 errcnt++;
 607                                 break;
 608                         }
 609                 }
 610                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 611                 {
 612                         if (ParseOptimization(argv[argno]) != OK)
 613                         {
 614                                 DisplayVersion();
 615                                 printf("Unknown switch: %s\n\n", argv[argno]);
 616                                 DisplayHelp();
 617                                 errcnt++;
 618                                 break;
 619                         }
 620                 }
 621                 else
 622                 {
 623                         // Record first filename.
 624                         if (firstfname == NULL)
 625                                 firstfname = argv[argno];
 626
 627                         strcpy(fnbuf, argv[argno]);
 628                         fext(fnbuf, ".s", 0);
 629                         fd = open(fnbuf, 0);
 630
 631                         if (fd < 0)
 632                         {
 633                                 printf("Cannot open: %s\n", fnbuf);
 634                                 errcnt++;
 635                                 continue;
 636                         }
 637
 638                         include(fd, fnbuf);
 639                         Assemble();
 640                 }
 641         }
 642
 643         // Wind-up processing;
 644         // o  save current section (no more code generation)
 645         // o  do auto-even of all sections (or boundary alignment as requested
 646         //    through '-r')
 647     // o  save the last pc value for 6502 (if we used 6502 at all) and
 648     //    detemine if the last section contains anything
 649         // o  determine name of object file:
 650         //    -  "foo.o" for linkable output;
 651         //    -  "foo.prg" for GEMDOS executable (-p flag).
 652         SaveSection();
 653         int temp_section = cursect;
 654
 655         for(i=TEXT; i<=BSS; i<<=1)
 656         {
 657                 SwitchSection(i);
 658
 659                 switch(segpadsize)
 660                 {
 661                 case 2:  d_even();    break;
 662                 case 4:  d_long();    break;
 663                 case 8:  d_phrase();  break;
 664                 case 16: d_dphrase(); break;
 665                 case 32: d_qphrase(); break;
 666                 }
 667
 668                 SaveSection();
 669         }
 670
 671         SwitchSection(M6502);
 672
 673         if (sloc != currentorg[0])
 674         {
 675                 currentorg[1] = sloc;
 676                 currentorg += 2;
 677         }
 678
 679         // This looks like an awful kludge...  !!! FIX !!!
 680         if (temp_section & (M56001P | M56001X | M56001Y))
 681         {
 682                 SwitchSection(temp_section);
 683
 684                 if (chptr != dsp_currentorg->start)
 685                 {
 686                         dsp_currentorg->end = chptr;
 687                         dsp_currentorg++;
 688                 }
 689         }
 690
 691         SwitchSection(TEXT);
 692
 693         if (objfname == NULL)
 694         {
 695                 if (firstfname == NULL)
 696                         firstfname = defname;
 697
 698                 strcpy(fnbuf, firstfname);
 699                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 700                 objfname = fnbuf;
 701         }
 702
 703         // With one pass finished, go back and:
 704         // (1)   run through all the fixups and resolve forward references;
 705         // (1.5) ensure that remaining fixups can be handled by the linker
 706         //       (`lo68' format, extended (postfix) format....)
 707         // (2)   generate the output file image and symbol table;
 708         // (3)   generate relocation information from left-over fixups.
 709         ResolveAllFixups();                                             // Do all fixups
 710         StopMark();                                                             // Stop mark tape-recorder
 711
 712         if (errcnt == 0)
 713         {
 714                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 715                         CantCreateFile(objfname);
 716
 717                 if (verb_flag)
 718                 {
 719                         s = (prg_flag ? "executable" : "object");
 720                         printf("[Writing %s file: %s]\n", s, objfname);
 721                 }
 722
 723                 WriteObject(fd);
 724                 close(fd);
 725
 726                 if (errcnt != 0)
 727                         unlink(objfname);
 728         }
 729
 730         if (list_flag)
 731         {
 732                 if (verb_flag)
 733                         printf("[Wrapping-up listing file]\n");
 734
 735                 listing = 1;
 736                 symtable();
 737                 close(list_fd);
 738         }
 739
 740         if (err_flag)
 741                 close(err_fd);
 742
 743         DEBUG dump_everything();
 744
 745         return errcnt;
 746 }
 747
 748
 749 //
 750 // Determine processor endianess
 751 //
 752 int GetEndianess(void)
 753 {
 754         int i = 1;
 755         char * p = (char *)&i;
 756
 757         if (p[0] == 1)
 758                 return 0;
 759
 760         return 1;
 761 }
 762
 763
 764 //
 765 // Application entry point
 766 //
 767 int main(int argc, char ** argv)
 768 {
 769         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 770         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 771
 772         // Set legacy optimisation flags to on and everything else to off
 773         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 774         optim_flags[OPT_ABS_SHORT] =
 775                 optim_flags[OPT_MOVEL_MOVEQ] =
 776                 optim_flags[OPT_BSR_BCC_S] = 1;
 777
 778         cmdlnexec = argv[0];                    // Obtain executable name
 779         endian = GetEndianess();                // Get processor endianess
 780
 781         // If commands were passed in, process them
 782         if (argc > 1)
 783                 return Process(argc - 1, argv + 1);
 784
 785         DisplayVersion();
 786         DisplayHelp();
 787
 788         return 0;
 789 }
 790