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

   1 //
   2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
   3 // SECT.C - Code Generation, Fixups and Section Management
   4 // Copyright (C) 199x Landon Dyer, 2011 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 "sect.h"
  10 #include "direct.h"
  11 #include "error.h"
  12 #include "expr.h"
  13 #include "listing.h"
  14 #include "mach.h"
  15 #include "mark.h"
  16 #include "riscasm.h"
  17 #include "symbol.h"
  18 #include "token.h"
  19
  20
  21 // Function prototypes
  22 void MakeSection(int, WORD);
  23 void SwitchSection(int);
  24
  25 // Section descriptors
  26 SECT sect[NSECTS];              // All sections...
  27 int cursect;                    // Current section number
  28
  29 // These are copied from the section descriptor, the current code chunk
  30 // descriptor and the current fixup chunk descriptor when a switch is made into
  31 // a section.  They are copied back to the descriptors when the section is left.
  32 WORD scattr;                    // Section attributes
  33 LONG sloc;                              // Current loc in section
  34
  35 CHUNK * scode;                  // Current (last) code chunk
  36 LONG challoc;                   // # bytes alloc'd to code chunk
  37 LONG ch_size;                   // # bytes used in code chunk
  38 char * chptr;                   // Deposit point in code chunk buffer
  39 char * chptr_opcode;    // Backup of chptr, updated before entering code generators
  40
  41 CHUNK * sfix;                   // Current (last) fixup chunk
  42 LONG fchalloc;                  // # bytes alloc'd to fixup chunk
  43 LONG fchsize;                   // # bytes used in fixup chunk
  44 PTR fchptr;                             // Deposit point in fixup chunk buffer
  45
  46 // Return a size (SIZB, SIZW, SIZL) or 0, depending on what kind of fixup is
  47 // associated with a location.
  48 static char fusiztab[] = {
  49    0,   // FU_QUICK
  50    1,   // FU_BYTE
  51    2,   // FU_WORD
  52    2,   // FU_WBYTE
  53    4,   // FU_LONG
  54    1,   // FU_BBRA
  55    0,   // (unused)
  56    1,   // FU_6BRA
  57 };
  58
  59 // Offset to REAL fixup location
  60 static char fusizoffs[] = {
  61    0,   // FU_QUICK
  62    0,   // FU_BYTE
  63    0,   // FU_WORD
  64    1,   // FU_WBYTE
  65    0,   // FU_LONG
  66    1,   // FU_BBRA
  67    0,   // (unused)
  68    0,   // FU_6BRA
  69 };
  70
  71
  72 //
  73 // Initialize sections; setup initial ABS, TEXT, DATA and BSS sections
  74 //
  75 void InitSection(void)
  76 {
  77         int i;
  78
  79         // Cleanup all sections
  80         for(i=0; i<NSECTS; i++)
  81                 MakeSection(i, 0);
  82
  83         // Construct default sections, make TEXT the current section
  84         MakeSection(ABS,  SUSED | SABS | SBSS);         // ABS
  85         MakeSection(TEXT, SUSED | TEXT       );         // TEXT
  86         MakeSection(DATA, SUSED | DATA       );         // DATA
  87         MakeSection(BSS,  SUSED | BSS  | SBSS);         // BSS
  88 //      MakeSection(M6502, SUSED | TEXT       );                // 6502 code section
  89
  90         // Switch to TEXT for starters
  91         SwitchSection(TEXT);
  92 }
  93
  94
  95 //
  96 // Make a new (clean) section
  97 //
  98 void MakeSection(int sno, WORD attr)
  99 {
 100         SECT * p = &sect[sno];
 101         p->scattr = attr;
 102         p->sloc = 0;
 103         p->scode = p->sfcode = NULL;
 104         p->sfix = p->sffix = NULL;
 105 }
 106
 107
 108 //
 109 // Switch to another section (copy section & chunk descriptors to global vars
 110 // for fast access)
 111 //
 112 void SwitchSection(int sno)
 113 {
 114         CHUNK * cp;
 115         cursect = sno;
 116         SECT * p = &sect[sno];
 117
 118         // Copy section vars
 119         scattr = p->scattr;
 120         sloc = p->sloc;
 121         scode = p->scode;
 122         sfix = p->sfix;
 123
 124         // Copy code chunk vars
 125         if ((cp = scode) != NULL)
 126         {
 127                 challoc = cp->challoc;
 128                 ch_size = cp->ch_size;
 129                 chptr = cp->chptr + ch_size;
 130         }
 131         else
 132                 challoc = ch_size = 0;
 133
 134         // Copy fixup chunk vars
 135         if ((cp = sfix) != NULL)
 136         {
 137                 fchalloc = cp->challoc;
 138                 fchsize = cp->ch_size;
 139                 fchptr.cp = cp->chptr + fchsize;
 140         }
 141         else
 142                 fchalloc = fchsize = 0;
 143 }
 144
 145
 146 //
 147 // Save current section
 148 //
 149 void SaveSection(void)
 150 {
 151         SECT * p = &sect[cursect];
 152
 153         p->scattr = scattr;                                             // Bailout section vars
 154         p->sloc = sloc;
 155
 156         if (scode != NULL)                                              // Bailout code chunk
 157                 scode->ch_size = ch_size;
 158
 159         if (sfix != NULL)                                               // Bailout fixup chunk
 160                 sfix->ch_size = fchsize;
 161 }
 162
 163
 164 //
 165 // Test to see if a location has a fixup sic'd on it.  This is used by the
 166 // listing generator to print 'xx's instead of '00's for forward references
 167 //
 168 int fixtest(int sno, LONG loc)
 169 {
 170         CHUNK * ch;
 171         PTR fup;
 172         char * fuend;
 173         WORD w;
 174         LONG xloc;
 175
 176         // Force update to sect[] variables
 177         StopMark();
 178
 179         // Hairy, ugly linear search for a mark on our location; the speed doesn't
 180         // matter, since this is only done when generating a listing, which is
 181         // SLOW.
 182         for(ch=sect[sno].sffix; ch!=NULL; ch=ch->chnext)
 183         {
 184                 fup.cp = (char *)ch->chptr;
 185                 fuend = fup.cp + ch->ch_size;
 186
 187                 while (fup.cp < fuend)
 188                 {
 189                         w = *fup.wp++;
 190                         xloc = *fup.lp++ + (int)fusizoffs[w & FUMASK];
 191                         fup.wp += 2;
 192
 193                         if (xloc == loc)
 194                                 return (int)fusiztab[w & FUMASK];
 195
 196                         if (w & FU_EXPR)
 197                         {
 198                                 w = *fup.wp++;
 199                                 fup.lp += w;
 200                         }
 201                         else
 202                                 fup.lp++;
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209
 210 //
 211 // Check that there are at least 'amt' bytes left in the current chunk. If
 212 // there are not, allocate another chunk of at least 'amt' bytes (and probably
 213 // more).
 214 //
 215 // If 'amt' is zero, ensure there are at least CH_THRESHOLD bytes, likewise.
 216 //
 217 int chcheck(LONG amt)
 218 {
 219         DEBUG { printf("chcheck(%u)\n", amt); }
 220         // If in BSS section, no allocation required
 221         if (scattr & SBSS)
 222                 return 0;
 223
 224         if (!amt)
 225                 amt = CH_THRESHOLD;
 226
 227         DEBUG { printf("    challoc=%i, ch_size=%i, diff=%i\n", challoc, ch_size, challoc-ch_size); }
 228         if ((int)(challoc - ch_size) >= (int)amt)
 229                 return 0;
 230
 231         if (amt < CH_CODE_SIZE)
 232                 amt = CH_CODE_SIZE;
 233
 234         DEBUG { printf("    amt (adjusted)=%u\n", amt); }
 235         SECT * p = &sect[cursect];
 236         CHUNK * cp = malloc(sizeof(CHUNK) + amt);
 237
 238         // First chunk in section
 239         if (scode == NULL)
 240         {
 241                 cp->chprev = NULL;
 242                 p->sfcode = cp;
 243         }
 244         // Add chunk to other chunks
 245         else
 246         {
 247                 cp->chprev = scode;
 248                 scode->chnext = cp;
 249                 scode->ch_size = ch_size;                       // Save old chunk's globals
 250         }
 251
 252         // Setup chunk and global vars
 253         cp->chloc = sloc;
 254         cp->chnext = NULL;
 255         challoc = cp->challoc = amt;
 256         ch_size = cp->ch_size = 0;
 257         chptr = cp->chptr = ((char *)cp) + sizeof(CHUNK);
 258         scode = p->scode = cp;
 259
 260         return 0;
 261 }
 262
 263
 264 // This is really wrong. We need to make some proper structures here so we
 265 // don't have to count sizes of objects, that's what the compiler's for! :-P
 266 #define FIXUP_BASE_SIZE (sizeof(WORD) + sizeof(LONG) + sizeof(WORD) + sizeof(WORD))
 267 //
 268 // Arrange for a fixup on a location
 269 //
 270 int AddFixup(WORD attr, LONG loc, TOKEN * fexpr)
 271 {
 272         LONG i;
 273         LONG len = 0;
 274         CHUNK * cp;
 275         SECT * p;
 276         // Shamus: Expression lengths are voodoo ATM (variable "i"). Need to fix
 277         //         this.
 278 WARNING(!!! AddFixup() is filled with VOODOO !!!)
 279         DEBUG printf("FIXUP@$%X: $%X\n", loc, attr);
 280
 281         // Compute length of expression (could be faster); determine if it's the
 282         // single-symbol case; no expression if it's just a mark. This code assumes
 283         // 16 bit WORDs and 32 bit LONGs
 284         if (*fexpr == SYMBOL && fexpr[2] == ENDEXPR)
 285         {
 286                 // Just a single symbol
 287                 // SCPCD : correct bit mask for attr (else other FU_xxx will match)
 288                 // NYAN !
 289                 if ((attr & FUMASKRISC) == FU_JR)
 290                 {
 291 //printf("AddFixup: ((attr & FUMASKRISC) == FU_JR)\n");
 292 //                      i = 18;
 293 //                      i = FIXUP_BASE_SIZE + (sizeof(LONG) * 2);
 294                         i = FIXUP_BASE_SIZE + sizeof(SYM *) + sizeof(LONG);
 295                 }
 296                 else
 297                 {
 298 //printf("AddFixup: ((attr & FUMASKRISC) == FU_JR) ELSE\n");
 299 //                      i = 14;
 300                         i = FIXUP_BASE_SIZE + sizeof(SYM *);
 301                 }
 302         }
 303         else
 304         {
 305 //printf("AddFixup: !SYMBOL\n");
 306                 attr |= FU_EXPR;
 307
 308                 for(len=0; fexpr[len]!=ENDEXPR; len++)
 309                 {
 310                         if (fexpr[len] == CONST || fexpr[len] == SYMBOL)
 311                                 len++;
 312                 }
 313
 314                 len++;                                                          // Add 1 for ENDEXPR
 315 //              i = (len << 2) + 12;
 316                 i = FIXUP_BASE_SIZE + sizeof(WORD) + (len * sizeof(TOKEN));
 317         }
 318
 319         // Alloc another fixup chunk for this one to fit in if necessary
 320         if ((fchalloc - fchsize) < i)
 321         {
 322                 p = &sect[cursect];
 323                 cp = (CHUNK *)malloc(sizeof(CHUNK) + CH_FIXUP_SIZE);
 324
 325                 // First fixup chunk in section
 326                 if (sfix == NULL)
 327                 {
 328                         cp->chprev = NULL;
 329                         p->sffix = cp;
 330                 }
 331                 // Add to other chunks
 332                 else
 333                 {
 334                         cp->chprev = sfix;
 335                         sfix->chnext = cp;
 336                         sfix->ch_size = fchsize;
 337                 }
 338
 339                 // Setup fixup chunk and its global vars
 340                 cp->chnext = NULL;
 341                 fchalloc = cp->challoc = CH_FIXUP_SIZE;
 342                 fchsize = cp->ch_size = 0;
 343                 fchptr.cp = cp->chptr = ((char *)cp) + sizeof(CHUNK);
 344                 sfix = p->sfix = cp;
 345         }
 346
 347         // Record fixup type, fixup location, and the file number and line number
 348         // the fixup is located at.
 349         *fchptr.wp++ = attr;
 350         *fchptr.lp++ = loc;
 351         *fchptr.wp++ = cfileno;
 352         *fchptr.wp++ = (WORD)curlineno;
 353
 354         // Store postfix expression or pointer to a single symbol, or nothing for a
 355         // mark.
 356         if (attr & FU_EXPR)
 357         {
 358                 *fchptr.wp++ = (WORD)len;
 359
 360                 while (len--)
 361                         *fchptr.lp++ = (LONG)*fexpr++;
 362         }
 363         else
 364         {
 365 //              *fchptr.lp++ = (LONG)fexpr[1];
 366                 *fchptr.sy++ = symbolPtr[fexpr[1]];
 367 //printf("AddFixup: adding symbol (%s) [%08X]\n", symbolPtr[fexpr[1]]->sname, symbolPtr[fexpr[1]]->sattr);
 368         }
 369
 370         // SCPCD : correct bit mask for attr (else other FU_xxx will match) NYAN !
 371         if ((attr & FUMASKRISC) == FU_JR)
 372         {
 373                 if (orgactive)
 374                         *fchptr.lp++ = orgaddr;
 375                 else
 376                         *fchptr.lp++ = 0x00000000;
 377         }
 378
 379         fchsize += i;
 380         return 0;
 381 }
 382
 383
 384 //
 385 // Resolve fixups in a section
 386 //
 387 int ResolveFixups(int sno)
 388 {
 389         PTR fup;                                // Current fixup
 390         WORD * fuend;                   // End of last fixup (in this chunk)
 391         WORD w;                                 // Fixup word (type+modes+flags)
 392         char * locp;                    // Location to fix (in cached chunk)
 393         LONG loc;                               // Location to fixup
 394         VALUE eval;                             // Expression value
 395         WORD eattr;                             // Expression attrib
 396         SYM * esym;                             // External symbol involved in expr
 397         SYM * sy;                               // (Temp) pointer to a symbol
 398         WORD i;                                 // (Temp) word
 399         WORD tdb;                               // eattr & TDB
 400         LONG oaddr;
 401         int reg2;
 402         WORD flags;
 403         unsigned page_jump = 0;
 404         unsigned address = 0;
 405         //unsigned j;
 406         //char buf[EBUFSIZ];
 407
 408         SECT * sc = &sect[sno];
 409         CHUNK * ch = sc->sffix;
 410
 411         if (ch == NULL)
 412                 return 0;
 413
 414         // "Cache" first chunk
 415         CHUNK * cch = sc->sfcode;
 416
 417         // Can't fixup a section with nothing in it
 418         if (cch == NULL)
 419                 return 0;
 420
 421         do
 422         {
 423                 fup.cp = ch->chptr;                                     // fup -> start of chunk
 424                 fuend = (WORD *)(fup.cp + ch->ch_size); // fuend -> end of chunk
 425
 426                 while (fup.wp < fuend)
 427                 {
 428                         w = *fup.wp++;
 429                         loc = *fup.lp++;
 430                         cfileno = *fup.wp++;
 431                         curlineno = (int)*fup.wp++;
 432 DEBUG { printf("ResolveFixups: cfileno=%u\n", cfileno); }
 433                         // This is based on global vars cfileno, curfname :-P
 434                         // This approach is kinda meh as well. I think we can do better than this.
 435                         SetFilenameForErrorReporting();
 436
 437                         esym = NULL;
 438
 439                         // Search for chunk containing location to fix up; compute a
 440                         // pointer to the location (in the chunk). Often we will find the
 441                         // fixup is in the "cached" chunk, so the linear-search is seldom
 442                         // executed.
 443                         if (loc < cch->chloc || loc >= (cch->chloc + cch->ch_size))
 444                         {
 445                                 for(cch=sc->sfcode; cch!=NULL; cch=cch->chnext)
 446                                 {
 447                                         if (loc >= cch->chloc && loc < (cch->chloc + cch->ch_size))
 448                                                 break;
 449                                 }
 450
 451                                 if (cch == NULL)
 452                                 {
 453                                         // Fixup (loc) out of range
 454                                         interror(7);
 455                                         // NOTREACHED
 456                                 }
 457                         }
 458
 459                         locp = cch->chptr + (loc - cch->chloc);
 460                         eattr = 0;
 461
 462                         // Compute expression/symbol value and attribs
 463                         // Complex expression
 464                         if (w & FU_EXPR)
 465                         {
 466                                 i = *fup.wp++;
 467
 468                                 if (evexpr(fup.tk, &eval, &eattr, &esym) != OK)
 469                                 {
 470                                         fup.lp += i;
 471                                         continue;
 472                                 }
 473
 474                                 fup.lp += i;
 475                         }
 476                         // Simple symbol
 477                         else
 478                         {
 479                                 sy = *fup.sy++;
 480                                 eattr = sy->sattr;
 481
 482                                 if (eattr & DEFINED)
 483                                         eval = sy->svalue;
 484                                 else
 485                                         eval = 0;
 486
 487                                 if ((eattr & (GLOBAL | DEFINED)) == GLOBAL)
 488                                         esym = sy;
 489                         }
 490
 491                         tdb = (WORD)(eattr & TDB);
 492
 493                         // If the expression is undefined and no external symbol is
 494                         // involved, then it's an error.
 495                         if (!(eattr & DEFINED) && (esym == NULL))
 496                         {
 497                                 error(undef_error);
 498                                 continue;
 499                         }
 500
 501 // It seems that this is completely unnecessary!
 502 #if 0
 503                         if (((w & FUMASKRISC) == FU_MOVEI) && esym)
 504 //{
 505 //printf("DoFixups: Setting symbol attre to RISCSYM...\n");
 506                                 esym->sattre |= RISCSYM;
 507 //}
 508 #endif
 509
 510                         // Do the fixup
 511                         //
 512                         // If a PC-relative fixup is undefined, its value is *not*
 513                         // subtracted from the location (that will happen in the linker
 514                         // when the external reference is resolved).
 515                         //
 516                         // MWC expects PC-relative things to have the LOC subtracted from
 517                         // the value, if the value is external (that is, undefined at this
 518                         // point).
 519                         //
 520                         // PC-relative fixups must be DEFINED and either in the same
 521                         // section (whereupon the subtraction takes place) or ABS (with no
 522                         // subtract).
 523                         if (w & FU_PCREL)
 524                         {
 525                                 if (eattr & DEFINED)
 526                                 {
 527                                         if (tdb == sno)
 528                                                 eval -= (VALUE)loc;
 529                                         else if (tdb)
 530                                         {
 531                                                 error("PC-relative expr across sections");
 532                                                 continue;
 533                                         }
 534
 535                                         if (sbra_flag && (w & FU_LBRA) && (eval + 0x80 < 0x100))
 536                                                 warn("unoptimized short branch");
 537                                 }
 538                                 else if (obj_format == MWC)
 539                                         eval -= (VALUE)loc;
 540
 541                                 tdb = 0;
 542                                 eattr &= ~TDB;
 543                         }
 544
 545                         // Do fixup classes
 546                         switch ((int)(w & FUMASK))
 547                         {
 548                         // FU_BBRA fixes up a one-byte branch offset.
 549                         case FU_BBRA:
 550                                 if (!(eattr & DEFINED))
 551                                 {
 552                                         error("external short branch");
 553                                         continue;
 554                                 }
 555
 556                                 eval -= 2;
 557
 558                                 if (eval + 0x80 >= 0x100)
 559                                         goto range;
 560
 561                                 if (eval == 0)
 562                                 {
 563                                         error("illegal bra.s with zero offset");
 564                                         continue;
 565                                 }
 566
 567                                 *++locp = (char)eval;
 568                                 break;
 569                         // Fixup one-byte value at locp + 1.
 570                         case FU_WBYTE:
 571                                 locp++;
 572                                 // FALLTHROUGH
 573                         // Fixup one-byte forward references
 574                         case FU_BYTE:
 575                                 if (!(eattr & DEFINED))
 576                                 {
 577                                         error("external byte reference");
 578                                         continue;
 579                                 }
 580
 581                                 if (tdb)
 582                                 {
 583                                         error("non-absolute byte reference");
 584                                         continue;
 585                                 }
 586
 587                                 if ((w & FU_PCREL) && eval + 0x80 >= 0x100)
 588                                         goto range;
 589
 590                                 if (w & FU_SEXT)
 591                                 {
 592                                         if (eval + 0x100 >= 0x200)
 593                                                 goto range;
 594                                 }
 595                                 else if (eval >= 0x100)
 596                                         goto range;
 597
 598                                 *locp = (char)eval;
 599                                 break;
 600                         // Fixup WORD forward references;
 601                         // the word could be unaligned in the section buffer, so we have to
 602                         // be careful.
 603                         case FU_WORD:
 604                                 if ((w & FUMASKRISC) == FU_JR)// || ((w & 0x0F00) == FU_MJR))
 605                                 {
 606                                         oaddr = *fup.lp++;
 607
 608                                         if (oaddr)
 609                                                 reg2 = (signed)((eval - (oaddr + 2)) / 2);// & 0x1F;
 610                                         else
 611                                                 reg2 = (signed)((eval - (loc + 2)) / 2);// & 0x1F;
 612
 613                                         if ((reg2 < -16) || (reg2 > 15))
 614                                         {
 615                                                 error("relative jump out of range");
 616                                                 break;
 617                                         }
 618
 619                                         *locp = (char)(*locp | ((reg2 >> 3) & 0x03));
 620                                         locp++;
 621                                         *locp = (char)(*locp | ((reg2 & 0x07) << 5));
 622                                         break;
 623                                 }
 624
 625                                 if ((w & FUMASKRISC) == FU_NUM15)
 626                                 {
 627                                         if (eval < -16 || eval > 15)
 628                                         {
 629                                                 error("constant out of range");
 630                                                 break;
 631                                         }
 632
 633                                         *locp = (char)(*locp | ((eval >> 3) & 0x03));
 634                                         locp++;
 635                                         *locp = (char)(*locp | ((eval & 0x07) << 5));
 636                                         break;
 637                                 }
 638
 639                                 if ((w & FUMASKRISC) == FU_NUM31)
 640                                 {
 641                                         if (eval < 0 || eval > 31)
 642                                         {
 643                                                 error("constant out of range");
 644                                                 break;
 645                                         }
 646
 647                                         *locp = (char)(*locp | ((eval >> 3) & 0x03));
 648                                         locp++;
 649                                         *locp = (char)(*locp | ((eval & 0x07) << 5));
 650                                         break;
 651                                 }
 652
 653                                 if ((w & FUMASKRISC) == FU_NUM32)
 654                                 {
 655                                         if (eval < 1 || eval > 32)
 656                                         {
 657                                                 error("constant out of range");
 658                                                 break;
 659                                         }
 660
 661                                         if (w & FU_SUB32)
 662                                                 eval = (32 - eval);
 663
 664                                         eval = (eval == 32) ? 0 : eval;
 665                                         *locp = (char)(*locp | ((eval >> 3) & 0x03));
 666                                         locp++;
 667                                         *locp = (char)(*locp | ((eval & 0x07) << 5));
 668                                         break;
 669                                 }
 670
 671                                 if ((w & FUMASKRISC) == FU_REGONE)
 672                                 {
 673                                         if (eval < 0 || eval > 31)
 674                                         {
 675                                                 error("register value out of range");
 676                                                 break;
 677                                         }
 678
 679                                         *locp = (char)(*locp | ((eval >> 3) & 0x03));
 680                                         locp++;
 681                                         *locp = (char)(*locp | ((eval & 0x07) << 5));
 682                                         break;
 683                                 }
 684
 685                                 if ((w & FUMASKRISC) == FU_REGTWO)
 686                                 {
 687                                         if (eval < 0 || eval > 31)
 688                                         {
 689                                                 error("register value out of range");
 690                                                 break;
 691                                         }
 692
 693                                         locp++;
 694                                         *locp = (char)(*locp | (eval & 0x1F));
 695                                         break;
 696                                 }
 697
 698                                 if (!(eattr & DEFINED))
 699                                 {
 700                                         if (w & FU_PCREL)
 701                                                 w = MPCREL | MWORD;
 702                                         else
 703                                                 w = MWORD;
 704
 705                                         rmark(sno, loc, 0, w, esym);
 706                                 }
 707                                 else
 708                                 {
 709                                         if (tdb)
 710                                                 rmark(sno, loc, tdb, MWORD, NULL);
 711
 712                                         if (w & FU_SEXT)
 713                                         {
 714                                                 if (eval + 0x10000 >= 0x20000)
 715                                                         goto range;
 716                                         }
 717                                         else
 718                                         {
 719                                                 // Range-check BRA and DBRA
 720                                                 if (w & FU_ISBRA)
 721                                                 {
 722                                                         if (eval + 0x8000 >= 0x10000)
 723                                                         goto range;
 724                                                 }
 725                                                 else if (eval >= 0x10000)
 726                                                         goto range;
 727                                         }
 728                                 }
 729
 730                                 *locp++ = (char)(eval >> 8);
 731                                 *locp = (char)eval;
 732                                 break;
 733                         // Fixup LONG forward references;
 734                         // the long could be unaligned in the section buffer, so be careful
 735                         // (again).
 736                         case FU_LONG:
 737                                 if ((w & FUMASKRISC) == FU_MOVEI)
 738                                 {
 739                                         // Long constant in MOVEI # is word-swapped, so fix it here
 740                                         eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
 741                                         flags = (MLONG | MMOVEI);
 742                                 }
 743                                 else
 744                                         flags = MLONG;
 745
 746                                 if (!(eattr & DEFINED))
 747                                 {
 748 //printf("Fixup (long): Symbol undefined. loc = $%X, long = $%X, flags = $%x\n", loc, eval, flags);
 749                                         rmark(sno, loc, 0, flags, esym);
 750                                 }
 751                                 else if (tdb)
 752                                 {
 753 //printf("Fixup (long): TDB = $%X. loc =$%X, long = $%X, flags = $%x\n", tdb, loc, eval, flags);
 754                                         rmark(sno, loc, tdb, flags, NULL);
 755                                 }
 756 //else
 757 //printf("Fixup (long): TDB = $%X. loc =$%X, long = $%X, flags = $%x\n", tdb, loc, eval, flags);
 758
 759                                 *locp++ = (char)(eval >> 24);
 760                                 *locp++ = (char)(eval >> 16);
 761                                 *locp++ = (char)(eval >> 8);
 762                                 *locp = (char)eval;
 763                                 break;
 764
 765                         // Fixup a 3-bit "QUICK" reference in bits 9..1
 766                         // (range of 1..8) in a word.  Really bits 1..3 in a byte.
 767                         case FU_QUICK:
 768                                 if (!(eattr & DEFINED))
 769                                 {
 770                                         error("External quick reference");
 771                                         continue;
 772                                 }
 773
 774                                 if (eval < 1 || eval > 8)
 775                                         goto range;
 776
 777                                 *locp |= (eval & 7) << 1;
 778                                 break;
 779
 780                         // Fix up 6502 funny branch
 781                         case FU_6BRA:
 782                                 eval -= (loc + 1);
 783
 784                                 if (eval + 0x80 >= 0x100)
 785                                         goto range;
 786
 787                                 *locp = (char)eval;
 788                                 break;
 789
 790                         default:
 791                                 // Bad fixup type--this should *never* happen!
 792                                 interror(4);
 793                                 // NOTREACHED
 794                         }
 795                         continue;
 796 range:
 797                         error("expression out of range");
 798                 }
 799
 800                 ch = ch->chnext;
 801         }
 802         while (ch != NULL);
 803
 804         return 0;
 805 }
 806
 807 //
 808 // Resolve all fixups
 809 //
 810 int ResolveAllFixups(void)
 811 {
 812         //unsigned i;
 813         //char buf[EBUFSIZ];
 814
 815         // Make undefined symbols GLOBL
 816         if (glob_flag)
 817                 ForceUndefinedSymbolsGlobal();
 818
 819         DEBUG printf("Resolving TEXT sections...\n");
 820         ResolveFixups(TEXT);
 821         DEBUG printf("Resolving DATA sections...\n");
 822         ResolveFixups(DATA);
 823
 824         return 0;
 825 }
 826
 827