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, 2011-2021 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 static int is_sep(char c)
 105 {
 106     const char *seps = PATH_SEPS;
 107
 108     for (seps = PATH_SEPS; *seps; seps++) {
 109         if (*seps == c)
 110             return 1;
 111     }
 112
 113     return 0;
 114 }
 115
 116 //
 117 // Return 'item'nth element of semicolon-seperated pathnames specified in the
 118 // enviroment string 's'. Copy the pathname to 'buf'.  Return 0 if the 'item'
 119 // nth path doesn't exist.
 120 //
 121 // ['item' ranges from 0 to N-1, where N = #elements in search path]
 122 //
 123 int nthpath(char * env_var, int itemno, char * buf)
 124 {
 125         char * s = searchpath;
 126
 127         if (s == NULL)
 128                 s = getenv(env_var);
 129
 130         if (s == NULL)
 131                 return 0;
 132
 133         while (itemno--)
 134                 while (*s != EOS && !is_sep(*s++))
 135                         ;
 136
 137         if (*s == EOS)
 138                 return 0;
 139
 140         while (*s != EOS && !is_sep(*s))
 141                 *buf++ = *s++;
 142
 143         *buf++ = EOS;
 144
 145         return 1;
 146 }
 147
 148
 149 //
 150 // Display command line help
 151 //
 152 void DisplayHelp(void)
 153 {
 154         printf("Usage:\n"
 155                 "    %s [options] srcfile\n"
 156                 "\n"
 157                 "Options:\n"
 158                 "  -? or -h          Display usage information\n"
 159                 "  -dsymbol[=value]  Define symbol (with optional value, default=0)\n"
 160                 "  -e[errorfile]     Send error messages to file, not stdout\n"
 161                 "  -f[format]        Output object file format\n"
 162                 "                    a: ALCYON\n"
 163                 "                    b: BSD (use this for Jaguar)\n"
 164                 "                    e: ELF\n"
 165                 "                    p: P56 (use this for DSP56001 only)\n"
 166                 "                    l: LOD (use this for DSP56001 only)\n"
 167                 "                    x: com/exe/xex (Atari 800)\n"
 168                 "                    r: absolute address\n"
 169                 "  -i[path]          Directory to search for include files\n"
 170                 "  -l[filename]      Create an output listing file\n"
 171                 "  -l*[filename]     Create an output listing file without pagination\n"
 172                 "  -m[cpu]           Select default CPU. Available options:\n"
 173                 "                    68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
 174                 "  -n                Don't do things behind your back in RISC assembler\n"
 175                 "  -o file           Output file name\n"
 176                 "  +o[value]         Turn a specific optimisation on\n"
 177                 "                    Available optimisation values and default settings:\n"
 178                 "                    o0: Absolute long addresses to word               (on)\n"
 179                 "                    o1: move.l #x,dn/an to moveq                      (on)\n"
 180                 "                    o2: Word branches to short                        (on)\n"
 181                 "                    o3: Outer displacement 0(an) to (an)              (off)\n"
 182                 "                    o4: lea size(An),An to addq #size,An              (off)\n"
 183                 "                    o5: 68020+ Absolute long base/outer disp. to word (off)\n"
 184                 "                    o6: Null branches to NOP                          (off)\n"
 185                 "                    o7: clr.l Dx to moveq #0,Dx                       (off)\n"
 186                 "                    o8: adda.w/l #x,Dy to addq.w/l #x,Dy              (off)\n"
 187                 "                    o9: adda.w/l #x,Dy to lea x(Dy),Dy                (off)\n"
 188                 "                    op: Enforce PC relative (alternative: o10)        (off)\n"
 189                 "  ~o[value]         Turn a specific optimisation off\n"
 190                 "  +oall             Turn all optimisations on\n"
 191                 "  ~oall             Turn all optimisations off\n"
 192                 "  -p                Create an ST .prg (without symbols). Forces -fa\n"
 193                 "  -ps               Create an ST .prg (with symbols). Forces -fa\n"
 194                 "  -px               Create an ST .prg (with exsymbols). Forces -fa\n"
 195                 "  -r[size]          Pad segments to boundary size specified\n"
 196                 "                    w: word (2 bytes, default alignment)\n"
 197                 "                    l: long (4 bytes)\n"
 198                 "                    p: phrase (8 bytes)\n"
 199                 "                    d: double phrase (16 bytes)\n"
 200                 "                    q: quad phrase (32 bytes)\n"
 201                 "  -s                Warn about possible short branches\n"
 202                 "                    and applied optimisations\n"
 203                 "  -u                Force referenced and undefined symbols global\n"
 204                 "  -v                Set verbose mode\n"
 205                 "  -x                Turn on debugging mode\n"
 206                 "  -y[pagelen]       Set page line length (default: 61)\n"
 207                 "\n", cmdlnexec);
 208 }
 209
 210
 211 //
 212 // Display version information
 213 //
 214 void DisplayVersion(void)
 215 {
 216         printf("\n"
 217                 " _ __ _ __ ___   __ _  ___ \n"
 218                 "| '__| '_ ` _ \\ / _` |/ __|\n"
 219                 "| |  | | | | | | (_| | (__ \n"
 220                 "|_|  |_| |_| |_|\\__,_|\\___|\n"
 221                 "\nRenamed Macro Assembler\n"
 222                 "Copyright (C) 199x Landon Dyer, 2011-2021 Reboot and Friends\n"
 223                 "V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
 224 }
 225
 226
 227 //
 228 // Parse optimisation options
 229 //
 230 int ParseOptimization(char * optstring)
 231 {
 232         int onoff = 0;
 233
 234         while (*optstring)
 235         {
 236                 if (*optstring == '+')
 237                         onoff = 1;
 238                 else if (*optstring != '~')
 239                         return ERROR;
 240
 241                 if ((optstring[2] == 'a' || optstring[2] == 'A')
 242                         && (optstring[3] == 'l' || optstring[3] == 'L')
 243                         && (optstring[4] == 'l' || optstring[4] == 'L'))
 244                 {
 245                         memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
 246                         optstring += 5;
 247                 }
 248                 else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
 249                 {
 250                         if (optstring[2] == 'p' || optstring[2] == 'P')
 251                         {
 252                                 optim_flags[OPT_PC_RELATIVE] = onoff;
 253                                 optstring += 3;
 254                         }
 255                         else
 256                         {
 257                                 int opt_no = atoi(&optstring[2]);
 258
 259                                 if ((opt_no >= 0) && (opt_no < OPT_COUNT))
 260                                 {
 261                                         optim_flags[opt_no] = onoff;
 262                                         optstring += 3;
 263
 264                                         // If opt_no is 2 digits then consume an extra character.
 265                                         // Sounds a bit sleazy but we know we're not going to hit
 266                                         // more than 100 optimisation switches so this should be
 267                                         // fine. If we do hit that number then it'll probably be
 268                                         // time to burn the whole codebase and start from scratch.
 269                                         if (opt_no > 9)
 270                                                 optstring++;
 271                                 }
 272                                 else
 273                                         return ERROR;
 274                         }
 275                 }
 276                 else
 277                 {
 278                         return ERROR;
 279                 }
 280
 281                 if (*optstring == ',')
 282                         optstring++;
 283         }
 284         return OK;
 285 }
 286
 287
 288 //
 289 // Process command line arguments and do an assembly
 290 //
 291 int Process(int argc, char ** argv)
 292 {
 293         int argno;                                              // Argument number
 294         SYM * sy;                                               // Pointer to a symbol record
 295         char * s;                                               // String pointer
 296         int fd;                                                 // File descriptor
 297         char fnbuf[FNSIZ];                              // Filename buffer
 298         int i;                                                  // Iterator
 299         int current_path_index = 0;             // Iterator for search paths
 300
 301         errcnt = 0;                                             // Initialize error count
 302         listing = 0;                                    // Initialize listing level
 303         list_flag = 0;                                  // Initialize listing flag
 304         verb_flag = perm_verb_flag;             // Initialize verbose flag
 305         as68_flag = 0;                                  // Initialize as68 kludge mode
 306         glob_flag = 0;                                  // Initialize .globl flag
 307         optim_warn_flag = 0;                    // Initialize short branch flag
 308         debug = 0;                                              // Initialize debug flag
 309         objfname = NULL;                                // Initialize object filename
 310         list_fname = NULL;                              // Initialize listing filename
 311         err_fname = NULL;                               // Initialize error filename
 312         obj_format = BSD;                               // Initialize object format
 313         firstfname = NULL;                              // Initialize first filename
 314         err_fd = ERROUT;                                // Initialize error file descriptor
 315         err_flag = 0;                                   // Initialize error flag
 316         rgpu = 0;                                               // Initialize GPU assembly flag
 317         rdsp = 0;                                               // Initialize DSP assembly flag
 318         robjproc = 0;                                   // Initialize OP assembly flag
 319         lsym_flag = 1;                                  // Include local symbols in object file
 320         regbank = BANK_N;                               // No RISC register bank specified
 321         orgactive = 0;                                  // Not in RISC org section
 322         orgwarning = 0;                                 // No ORG warning issued
 323         segpadsize = 2;                                 // Initialize segment padding size
 324     dsp_orgmap[0].start = 0;            // Initialize 56001 org initial address
 325     dsp_orgmap[0].memtype = ORG_P;      // Initialize 56001 org start segment
 326         m6502 = 0;                                              // 6502 mode off by default
 327
 328         // Initialize modules
 329         InitSymbolTable();                              // Symbol table
 330         InitTokenizer();                                // Tokenizer
 331         InitLineProcessor();                    // Line processor
 332         InitExpression();                               // Expression analyzer
 333         InitSection();                                  // Section manager / code generator
 334         InitMark();                                             // Mark tape-recorder
 335         InitMacro();                                    // Macro processor
 336         InitListing();                                  // Listing generator
 337         Init6502();                                             // 6502 assembler
 338
 339         // Process command line arguments and assemble source files
 340         for(argno=0; argno<argc; argno++)
 341         {
 342                 if (*argv[argno] == '-')
 343                 {
 344                         switch (argv[argno][1])
 345                         {
 346                         case 'd':                               // Define symbol
 347                         case 'D':
 348                                 for(s=argv[argno]+2; *s!=EOS;)
 349                                 {
 350                                         if (*s++ == '=')
 351                                         {
 352                                                 s[-1] = EOS;
 353                                                 break;
 354                                         }
 355                                 }
 356
 357                                 if (argv[argno][2] == EOS)
 358                                 {
 359                                         printf("-d: empty symbol\n");
 360                                         errcnt++;
 361                                         return errcnt;
 362                                 }
 363
 364                                 sy = lookup(argv[argno] + 2, 0, 0);
 365
 366                                 if (sy == NULL)
 367                                 {
 368                                         sy = NewSymbol(argv[argno] + 2, LABEL, 0);
 369                                         sy->svalue = 0;
 370                                 }
 371
 372                                 sy->sattr = DEFINED | EQUATED | ABS;
 373                                 sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
 374                                 break;
 375                         case 'e':                               // Redirect error message output
 376                         case 'E':
 377                                 err_fname = argv[argno] + 2;
 378                                 break;
 379                         case 'f':                               // -f<format>
 380                         case 'F':
 381                                 switch (argv[argno][2])
 382                                 {
 383                                 case EOS:
 384                                 case 'a':                       // -fa = Alcyon [the default]
 385                                 case 'A':
 386                                         obj_format = ALCYON;
 387                                         break;
 388                                 case 'b':                       // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
 389                                 case 'B':
 390                                         obj_format = BSD;
 391                                         break;
 392                                 case 'e':                       // -fe = ELF
 393                                 case 'E':
 394                                         obj_format = ELF;
 395                                         break;
 396                 case 'l':           // -fl = LOD
 397                 case 'L':
 398                     obj_format = LOD;
 399                     break;
 400                 case 'p':           // -fp = P56
 401                 case 'P':
 402                     obj_format = P56;
 403                                         break;
 404                                 case 'x':                       // -fx = COM/EXE/XEX
 405                                 case 'X':
 406                                         obj_format = XEX;
 407                                         break;
 408                 case 'r':           // -fr = Absolute address
 409                 case 'R':
 410                     obj_format = RAW;
 411                     break;
 412                                 default:
 413                                         printf("-f: unknown object format specified\n");
 414                                         errcnt++;
 415                                         return errcnt;
 416                                 }
 417                                 break;
 418                         case 'g':                               // Debugging flag
 419                         case 'G':
 420                                 printf("Debugging flag (-g) not yet implemented\n");
 421                                 break;
 422                         case 'i':                               // Set directory search path
 423                         case 'I':
 424                         {
 425                                 strcat(searchpatha, argv[argno] + 2);
 426                                 strcat(searchpatha, ";");
 427                                 searchpath = searchpatha;
 428
 429                                 // Check to see if include paths actually exist
 430                                 char current_path[256];
 431
 432                                 for(i=current_path_index; nthpath("RMACPATH", i, current_path)!=0; i++)
 433                                 {
 434                                         if (strlen(current_path) > 0)
 435                                         {
 436                                                 DIR * test = opendir(current_path);
 437
 438                                                 if (test == NULL)
 439                                                 {
 440                                                         printf("Invalid include path: %s\n", current_path);
 441                                                         errcnt++;
 442                                                         return errcnt;
 443                                                 }
 444
 445                                                 closedir(test);
 446                                         }
 447                                 }
 448
 449                                 current_path_index = i - 1;
 450                                 break;
 451                         }
 452                         case 'l':                               // Produce listing file
 453                         case 'L':
 454                                 if (*(argv[argno] + 2) == '*')
 455                                 {
 456                                         list_fname = argv[argno] + 3;
 457                                         list_pag = 0;    // Special case - turn off pagination
 458                                 }
 459                                 else
 460                                 {
 461                                         list_fname = argv[argno] + 2;
 462                                 }
 463
 464                                 listing = 1;
 465                                 list_flag = 1;
 466                                 lnsave++;
 467                                 break;
 468                         case 'm':
 469                         case 'M':
 470                                 if (strcmp(argv[argno] + 2, "68000") == 0)
 471                                         d_68000();
 472                                 else if (strcmp(argv[argno] + 2, "68020") == 0)
 473                                         d_68020();
 474                                 else if (strcmp(argv[argno] + 2, "68030") == 0)
 475                                         d_68030();
 476                                 else if (strcmp(argv[argno] + 2, "68040") == 0)
 477                                         d_68040();
 478                                 else if (strcmp(argv[argno] + 2, "68060") == 0)
 479                                         d_68060();
 480                                 else if (strcmp(argv[argno] + 2, "68881") == 0)
 481                                         d_68881();
 482                                 else if (strcmp(argv[argno] + 2, "68882") == 0)
 483                                         d_68882();
 484                                 else if (strcmp(argv[argno] + 2, "56001") == 0)
 485                                         d_56001();
 486                                 else if (strcmp(argv[argno] + 2, "6502") == 0)
 487                                         d_6502();
 488                                 else if (strcmp(argv[argno] + 2, "tom") == 0)
 489                                         d_gpu();
 490                                 else if (strcmp(argv[argno] + 2, "jerry") == 0)
 491                                         d_dsp();
 492                                 else
 493                                 {
 494                                         printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
 495                                         errcnt++;
 496                                         return errcnt;
 497                                 }
 498                                 break;
 499                         case 'o':                               // Direct object file output
 500                         case 'O':
 501                                 if (argv[argno][2] != EOS)
 502                                         objfname = argv[argno] + 2;
 503                                 else
 504                                 {
 505                                         if (++argno >= argc)
 506                                         {
 507                                                 printf("Missing argument to -o");
 508                                                 errcnt++;
 509                                                 return errcnt;
 510                                         }
 511
 512                                         objfname = argv[argno];
 513                                 }
 514
 515                                 break;
 516                         case 'p':               /* -p: generate ".PRG" executable output */
 517                         case 'P':
 518                                 /*
 519                                  * -p           .PRG generation w/o symbols
 520                                  * -ps          .PRG generation with symbols
 521                                  * -px          .PRG generation with extended symbols
 522                                  */
 523                                 switch (argv[argno][2])
 524                                 {
 525                                         case EOS:
 526                                                 prg_flag = 1;
 527                                                 break;
 528
 529                                         case 's':
 530                                         case 'S':
 531                                                 prg_flag = 2;
 532                                                 break;
 533
 534                                         case 'x':
 535                                         case 'X':
 536                                                 prg_flag = 3;
 537                                                 break;
 538
 539                                         default:
 540                                                 printf("-p: syntax error\n");
 541                                                 errcnt++;
 542                                                 return errcnt;
 543                                 }
 544
 545                                 // Enforce Alcyon object format - kind of silly
 546                                 // to ask for .prg output without it!
 547                                 obj_format = ALCYON;
 548                                 break;
 549                         case 'r':                               // Pad seg to requested boundary size
 550                         case 'R':
 551                                 switch(argv[argno][2])
 552                                 {
 553                                 case 'w': case 'W': segpadsize = 2;  break;
 554                                 case 'l': case 'L': segpadsize = 4;  break;
 555                                 case 'p': case 'P': segpadsize = 8;  break;
 556                                 case 'd': case 'D': segpadsize = 16; break;
 557                                 case 'q': case 'Q': segpadsize = 32; break;
 558                                 default: segpadsize = 2; break; // Effective autoeven();
 559                                 }
 560                                 break;
 561                         case 's':                               // Warn about possible short branches and applied optimisations
 562                         case 'S':
 563                                 optim_warn_flag = 1;
 564                                 break;
 565                         case 'u':                               // Make undefined symbols .globl
 566                         case 'U':
 567                                 glob_flag = 1;
 568                                 break;
 569                         case 'v':                               // Verbose flag
 570                         case 'V':
 571                                 verb_flag++;
 572
 573                                 if (verb_flag > 1)
 574                                         DisplayVersion();
 575
 576                                 break;
 577                         case 'x':                               // Turn on debugging
 578                         case 'X':
 579                                 debug = 1;
 580                                 printf("~ Debugging ON\n");
 581                                 break;
 582                         case 'y':                               // -y<pagelen>
 583                         case 'Y':
 584                                 pagelen = atoi(argv[argno] + 2);
 585
 586                                 if (pagelen < 10)
 587                                 {
 588                                         printf("-y: bad page length\n");
 589                                         errcnt++;
 590                                         return errcnt;
 591                                 }
 592
 593                                 break;
 594                         case EOS:                               // Input is stdin
 595                                 if (firstfname == NULL) // Kludge first filename
 596                                         firstfname = defname;
 597
 598                                 include(0, "(stdin)");
 599                                 Assemble();
 600                                 break;
 601                         case 'h':                               // Display command line usage
 602                         case 'H':
 603                         case '?':
 604                                 DisplayVersion();
 605                                 DisplayHelp();
 606                                 errcnt++;
 607                                 break;
 608                         case 'n':                               // Turn off legacy mode
 609                         case 'N':
 610                                 legacy_flag = 0;
 611                                 printf("Legacy mode OFF\n");
 612                                 break;
 613                         default:
 614                                 DisplayVersion();
 615                                 printf("Unknown switch: %s\n\n", argv[argno]);
 616                                 DisplayHelp();
 617                                 errcnt++;
 618                                 break;
 619                         }
 620                 }
 621                 else if (*argv[argno] == '+' || *argv[argno] == '~')
 622                 {
 623                         if (ParseOptimization(argv[argno]) != OK)
 624                         {
 625                                 DisplayVersion();
 626                                 printf("Unknown switch: %s\n\n", argv[argno]);
 627                                 DisplayHelp();
 628                                 errcnt++;
 629                                 break;
 630                         }
 631                 }
 632                 else
 633                 {
 634                         // Record first filename.
 635                         if (firstfname == NULL)
 636                                 firstfname = argv[argno];
 637
 638                         strcpy(fnbuf, argv[argno]);
 639                         fext(fnbuf, ".s", 0);
 640                         fd = open(fnbuf, 0);
 641
 642                         if (fd < 0)
 643                         {
 644                                 printf("Cannot open: %s\n", fnbuf);
 645                                 errcnt++;
 646                                 continue;
 647                         }
 648
 649                         include(fd, fnbuf);
 650                         Assemble();
 651                 }
 652         }
 653
 654         // Wind-up processing;
 655         // o  save current section (no more code generation)
 656         // o  do auto-even of all sections (or boundary alignment as requested
 657         //    through '-r')
 658     // o  save the last pc value for 6502 (if we used 6502 at all) and
 659     //    detemine if the last section contains anything
 660         // o  determine name of object file:
 661         //    -  "foo.o" for linkable output;
 662         //    -  "foo.prg" for GEMDOS executable (-p flag).
 663         SaveSection();
 664         int temp_section = cursect;
 665
 666         for(i=TEXT; i<=BSS; i<<=1)
 667         {
 668                 SwitchSection(i);
 669
 670                 switch(segpadsize)
 671                 {
 672                 case 2:  d_even();    break;
 673                 case 4:  d_long();    break;
 674                 case 8:  d_phrase();  break;
 675                 case 16: d_dphrase(); break;
 676                 case 32: d_qphrase(); break;
 677                 }
 678
 679                 SaveSection();
 680         }
 681
 682         SwitchSection(M6502);
 683
 684         if (sloc != currentorg[0])
 685         {
 686                 currentorg[1] = sloc;
 687                 currentorg += 2;
 688         }
 689
 690         // This looks like an awful kludge...  !!! FIX !!!
 691         if (temp_section & (M56001P | M56001X | M56001Y))
 692         {
 693                 SwitchSection(temp_section);
 694
 695                 if (chptr != dsp_currentorg->start)
 696                 {
 697                         dsp_currentorg->end = chptr;
 698                         dsp_currentorg++;
 699                 }
 700         }
 701
 702         SwitchSection(TEXT);
 703
 704         if (objfname == NULL)
 705         {
 706                 if (firstfname == NULL)
 707                         firstfname = defname;
 708
 709                 strcpy(fnbuf, firstfname);
 710                 fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
 711                 objfname = fnbuf;
 712         }
 713
 714         // With one pass finished, go back and:
 715         // (1)   run through all the fixups and resolve forward references;
 716         // (1.5) ensure that remaining fixups can be handled by the linker
 717         //       (`lo68' format, extended (postfix) format....)
 718         // (2)   generate the output file image and symbol table;
 719         // (3)   generate relocation information from left-over fixups.
 720         ResolveAllFixups();                                             // Do all fixups
 721         StopMark();                                                             // Stop mark tape-recorder
 722
 723         if (errcnt == 0)
 724         {
 725                 if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
 726                         CantCreateFile(objfname);
 727
 728                 if (verb_flag)
 729                 {
 730                         s = (prg_flag ? "executable" : "object");
 731                         printf("[Writing %s file: %s]\n", s, objfname);
 732                 }
 733
 734                 WriteObject(fd);
 735                 close(fd);
 736
 737                 if (errcnt != 0)
 738                         unlink(objfname);
 739         }
 740
 741         if (list_flag)
 742         {
 743                 if (verb_flag)
 744                         printf("[Wrapping-up listing file]\n");
 745
 746                 listing = 1;
 747                 symtable();
 748                 close(list_fd);
 749         }
 750
 751         if (err_flag)
 752                 close(err_fd);
 753
 754         DEBUG dump_everything();
 755
 756         return errcnt;
 757 }
 758
 759
 760 //
 761 // Determine processor endianess
 762 //
 763 int GetEndianess(void)
 764 {
 765         int i = 1;
 766         char * p = (char *)&i;
 767
 768         if (p[0] == 1)
 769                 return 0;
 770
 771         return 1;
 772 }
 773
 774
 775 //
 776 // Application entry point
 777 //
 778 int main(int argc, char ** argv)
 779 {
 780         perm_verb_flag = 0;                             // Clobber "permanent" verbose flag
 781         legacy_flag = 1;                                // Default is legacy mode on (:-P)
 782
 783         // Set legacy optimisation flags to on and everything else to off
 784         memset(optim_flags, 0, OPT_COUNT * sizeof(int));
 785         optim_flags[OPT_ABS_SHORT] =
 786                 optim_flags[OPT_MOVEL_MOVEQ] =
 787                 optim_flags[OPT_BSR_BCC_S] = 1;
 788
 789         cmdlnexec = argv[0];                    // Obtain executable name
 790         endian = GetEndianess();                // Get processor endianess
 791
 792         // If commands were passed in, process them
 793         if (argc > 1)
 794                 return Process(argc - 1, argv + 1);
 795
 796         DisplayVersion();
 797         DisplayHelp();
 798
 799         return 0;
 800 }
 801