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