Added missing d_ds handling, add kludge for 56K fixups.
[rmac] / sect.c
1 //
2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // SECT.C - Code Generation, Fixups and Section Management
4 // Copyright (C) 199x Landon Dyer, 2011-2019 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 "6502.h"
11 #include "direct.h"
12 #include "dsp56k.h"
13 #include "error.h"
14 #include "expr.h"
15 #include "listing.h"
16 #include "mach.h"
17 #include "mark.h"
18 #include "riscasm.h"
19 #include "symbol.h"
20 #include "token.h"
21
22
23 // Function prototypes
24 void MakeSection(int, uint16_t);
25 void SwitchSection(int);
26
27 // Section descriptors
28 SECT sect[NSECTS];              // All sections...
29 int cursect;                    // Current section number
30
31 // These are copied from the section descriptor, the current code chunk
32 // descriptor and the current fixup chunk descriptor when a switch is made into
33 // a section. They are copied back to the descriptors when the section is left.
34 uint16_t scattr;                // Section attributes
35 uint32_t sloc;                  // Current loc in section
36
37 CHUNK * scode;                  // Current (last) code chunk
38 uint32_t challoc;               // # bytes alloc'd to code chunk
39 uint32_t ch_size;               // # bytes used in code chunk
40 uint8_t * chptr;                // Deposit point in code chunk buffer
41 uint8_t * chptr_opcode; // Backup of chptr, updated before entering code generators
42
43 // Return a size (SIZB, SIZW, SIZL) or 0, depending on what kind of fixup is
44 // associated with a location.
45 static uint8_t fusiztab[] = {
46         0,      // FU_QUICK
47         1,      // FU_BYTE
48         2,      // FU_WORD
49         2,      // FU_WBYTE
50         4,      // FU_LONG
51         1,      // FU_BBRA
52         0,      // (unused)
53         1,      // FU_6BRA
54 };
55
56 // Offset to REAL fixup location
57 static uint8_t fusizoffs[] = {
58         0,      // FU_QUICK
59         0,      // FU_BYTE
60         0,      // FU_WORD
61         1,      // FU_WBYTE
62         0,      // FU_LONG
63         1,      // FU_BBRA
64         0,      // (unused)
65         0,      // FU_6BRA
66 };
67
68
69 //
70 // Initialize sections; setup initial ABS, TEXT, DATA and BSS sections
71 //
72 void InitSection(void)
73 {
74         // Initialize all sections
75         for(int i=0; i<NSECTS; i++)
76                 MakeSection(i, 0);
77
78         // Construct default sections, make TEXT the current section
79         MakeSection(ABS,     SUSED | SABS | SBSS);      // ABS
80         MakeSection(TEXT,    SUSED | TEXT       );      // TEXT
81         MakeSection(DATA,    SUSED | DATA       );      // DATA
82         MakeSection(BSS,     SUSED | BSS  | SBSS);      // BSS
83         MakeSection(M6502,   SUSED | TEXT       );      // 6502 code section
84         MakeSection(M56001P, SUSED | SABS       );      // DSP 56001 Program RAM
85         MakeSection(M56001X, SUSED | SABS       );      // DSP 56001 X RAM
86         MakeSection(M56001Y, SUSED | SABS       );      // DSP 56001 Y RAM
87
88         // Switch to TEXT for starters
89         SwitchSection(TEXT);
90 }
91
92
93 //
94 // Make a new (clean) section
95 //
96 void MakeSection(int sno, uint16_t attr)
97 {
98         SECT * sp = &sect[sno];
99         sp->scattr = attr;
100         sp->sloc = 0;
101         sp->orgaddr = 0;
102         sp->scode = sp->sfcode = NULL;
103         sp->sfix = sp->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 * sp = &sect[sno];
116
117         m6502 = (sno == M6502); // Set 6502-mode flag
118
119         // Copy section vars
120         scattr = sp->scattr;
121         sloc = sp->sloc;
122         scode = sp->scode;
123         orgaddr = sp->orgaddr;
124
125         // Copy code chunk vars
126         if ((cp = scode) != NULL)
127         {
128                 challoc = cp->challoc;
129                 ch_size = cp->ch_size;
130                 chptr = cp->chptr + ch_size;
131
132                 // For 6502 mode, add the last org'd address
133 // Why?
134 /*
135 Because the way this is set up it treats the 6502 assembly space as a single 64K space (+ 16 bytes, for some unknown reason) and just bobbles around inside that space and uses a stack of org "pointers" to show where the data ended up.
136
137 This is a shitty way to handle things, and we can do better than this!  :-P
138
139 Really, there's no reason to have the 6502 (or DSP56001 for that matter) have their own private sections for this kind of thing, as there's literally *no* chance that it would be mingled with 68K+ code.  It should be able to use the TEXT, DATA & BSS sections just like the 68K.
140
141 Or should it?  After looking at the code, maybe it's better to keep the 56001 sections segregated from the rest.  But we can still make the 6502 stuff better.
142 */
143                 if (m6502)
144                         chptr = cp->chptr + orgaddr;
145         }
146         else
147                 challoc = ch_size = 0;
148 }
149
150
151 //
152 // Save current section
153 //
154 void SaveSection(void)
155 {
156         SECT * sp = &sect[cursect];
157
158         sp->scattr = scattr;                    // Bailout section vars
159         sp->sloc = sloc;
160         sp->orgaddr = orgaddr;
161
162         if (scode != NULL)                              // Bailout code chunk (if any)
163                 scode->ch_size = ch_size;
164 }
165
166
167 //
168 // Test to see if a location has a fixup set on it. This is used by the
169 // listing generator to print 'xx's instead of '00's for forward references
170 //
171 int fixtest(int sno, uint32_t loc)
172 {
173         // Force update to sect[] variables
174         StopMark();
175
176         // Ugly linear search for a mark on our location. The speed doesn't
177         // matter, since this is only done when generating a listing, which is
178         // SLOW anyway.
179         for(FIXUP * fp=sect[sno].sffix; fp!=NULL; fp=fp->next)
180         {
181                 uint32_t w = fp->attr;
182                 uint32_t xloc = fp->loc + (int)fusizoffs[w & FUMASK];
183
184                 if (xloc == loc)
185                         return (int)fusiztab[w & FUMASK];
186         }
187
188         return 0;
189 }
190
191
192 //
193 // Check that there are at least 'amt' bytes left in the current chunk. If
194 // there are not, allocate another chunk of at least CH_CODE_SIZE bytes or
195 // 'amt', whichever is larger.
196 //
197 // If 'amt' is zero, ensure there are at least CH_THRESHOLD bytes, likewise.
198 //
199 void chcheck(uint32_t amt)
200 {
201         DEBUG { printf("chcheck(%u)\n", amt); }
202
203         // If in BSS section, no allocation required
204         if (scattr & SBSS)
205                 return;
206
207         if (amt == 0)
208                 amt = CH_THRESHOLD;
209
210         DEBUG { printf("    challoc=%i, ch_size=%i, diff=%i\n", challoc, ch_size, challoc - ch_size); }
211
212         if ((int)(challoc - ch_size) >= (int)amt)
213                 return;
214
215         if (amt < CH_CODE_SIZE)
216                 amt = CH_CODE_SIZE;
217
218         DEBUG { printf("    amt (adjusted)=%u\n", amt); }
219         SECT * p = &sect[cursect];
220         CHUNK * cp = malloc(sizeof(CHUNK) + amt);
221         int first = 0;
222
223         if (scode == NULL)
224         {
225                 // First chunk in section
226                 cp->chprev = NULL;
227                 p->sfcode = cp;
228                 first = 1;
229         }
230         else
231         {
232                 // Add second and on to previous chunk
233                 cp->chprev = scode;
234                 scode->chnext = cp;
235                 scode->ch_size = ch_size;       // Save old chunk's globals
236         }
237
238         // Setup chunk and global vars
239 /*
240 So, whenever there's an ORG in a 56K section, it sets sloc TO THE ADDRESS IN THE ORG.  Also, the loc/sloc are incremented by 1s, which means to alias correctly to the byte-oriented memory model we have here, we have to fix that kind of crap.
241 */
242         cp->chloc = sloc; // <-- HERE'S THE PROBLEM FOR 56K  :-/
243         cp->chnext = NULL;
244         challoc = cp->challoc = amt;
245         ch_size = cp->ch_size = 0;
246         chptr = cp->chptr = ((uint8_t *)cp) + sizeof(CHUNK);
247         scode = p->scode = cp;
248
249         // A quick kludge
250 /*
251 OK, so this is a bit shite, but at least it gets things working the way they should.  The right way to do this is not rely on sloc & friends for the right fixup address but to have an accurate model of the thing.  That will probably come with v2.0.1  :-P
252
253 So the problem is, d_org sets sloc to the address of the ORG statement, and that gives an incorrect base for the fixup.  And so when a second (or later) chunk is allocated, it gets set wrong.  Further complicating things is that the orgaddress *does not* get used in a typical way with the DSP56001 code, and, as such, causes incorrect addresses to be generated.  All that has to be dealt with in order to get this right and do away with this kludge.
254 */
255         if (((cursect == M56001P) || (cursect == M56001X) || (cursect == M56001Y)) && !first)
256                 cp->chloc = cp->chprev->chloc + cp->chprev->ch_size;
257
258         return;
259 }
260
261
262 //
263 // Arrange for a fixup on a location
264 //
265 int AddFixup(uint32_t attr, uint32_t loc, TOKEN * fexpr)
266 {
267         uint16_t exprlen = 0;
268         SYM * symbol = NULL;
269         uint32_t _orgaddr = 0;
270
271         // First, check to see if the expression is a bare label, otherwise, force
272         // the FU_EXPR flag into the attributes and count the tokens.
273         if ((fexpr[0] == SYMBOL) && (fexpr[2] == ENDEXPR))
274         {
275                 symbol = symbolPtr[fexpr[1]];
276
277                 // Save the org address for JR RISC instruction
278                 if ((attr & FUMASKRISC) == FU_JR)
279                         _orgaddr = orgaddr;
280         }
281         else
282         {
283                 attr |= FU_EXPR;
284                 exprlen = ExpressionLength(fexpr);
285         }
286
287         // Second, check to see if it's a DSP56001 fixup, and force the FU_56001
288         // flag into the attributes if so; also save the current org address.
289         if (attr & FUMASKDSP)
290         {
291                 attr |= FU_56001;
292                 // Save the exact spot in this chunk where the fixup should go
293                 _orgaddr = chptr - scode->chptr + scode->chloc;
294         }
295
296         // Allocate space for the fixup + any expression
297         FIXUP * fixup = malloc(sizeof(FIXUP) + (sizeof(TOKEN) * exprlen));
298
299         // Store the relevant fixup information in the FIXUP
300         fixup->next = NULL;
301         fixup->attr = attr;
302         fixup->loc = loc;
303         fixup->fileno = cfileno;
304         fixup->lineno = curlineno;
305         fixup->expr = NULL;
306         fixup->symbol = symbol;
307         fixup->orgaddr = _orgaddr;
308
309         // Copy the passed in expression to the FIXUP, if any
310         if (exprlen > 0)
311         {
312                 fixup->expr = (TOKEN *)((uint8_t *)fixup + sizeof(FIXUP));
313                 memcpy(fixup->expr, fexpr, sizeof(TOKEN) * exprlen);
314         }
315
316         // Finally, put the FIXUP in the current section's linked list
317         if (sect[cursect].sffix == NULL)
318         {
319                 sect[cursect].sffix = fixup;
320                 sect[cursect].sfix = fixup;
321         }
322         else
323         {
324                 sect[cursect].sfix->next = fixup;
325                 sect[cursect].sfix = fixup;
326         }
327
328         DEBUG { printf("AddFixup: sno=%u, l#=%u, attr=$%X, loc=$%X, expr=%p, sym=%p, org=$%X\n", cursect, fixup->lineno, fixup->attr, fixup->loc, (void *)fixup->expr, (void *)fixup->symbol, fixup->orgaddr);
329                 if (symbol != NULL)
330                         printf("          name: %s, value: $%lX\n", symbol->sname, symbol->svalue);
331         }
332
333         return 0;
334 }
335
336
337 //
338 // Resolve fixups in the passed in section
339 //
340 int ResolveFixups(int sno)
341 {
342         SECT * sc = &sect[sno];
343
344         // "Cache" first chunk
345         CHUNK * cch = sc->sfcode;
346
347         // Can't fixup a section with nothing in it
348         if (cch == NULL)
349                 return 0;
350
351         // Wire the 6502 segment's size to its allocated size (64K)
352         if (sno == M6502)
353                 cch->ch_size = cch->challoc;
354
355         // Get first fixup for the passed in section
356         FIXUP * fixup = sect[sno].sffix;
357
358         while (fixup != NULL)
359         {
360                 // We do it this way because we have continues everywhere... :-P
361                 FIXUP * fup = fixup;
362                 fixup = fixup->next;
363
364                 uint32_t dw = fup->attr;        // Fixup long (type + modes + flags)
365                 uint32_t loc = fup->loc;        // Location to fixup
366                 cfileno = fup->fileno;
367                 curlineno = fup->lineno;
368                 DEBUG { printf("ResolveFixups: sect#=%u, l#=%u, attr=$%X, loc=$%X, expr=%p, sym=%p, org=$%X\n", sno, fup->lineno, fup->attr, fup->loc, (void *)fup->expr, (void *)fup->symbol, fup->orgaddr); }
369
370                 // This is based on global vars cfileno, curfname :-P
371                 // This approach is kinda meh as well. I think we can do better
372                 // than this.
373                 SetFilenameForErrorReporting();
374
375                 if ((sno == M56001P) || (sno == M56001X) || (sno == M56001Y) || (sno == M56001L))
376                         loc = fup->orgaddr;
377
378                 // Search for chunk containing location to fix up; compute a
379                 // pointer to the location (in the chunk). Often we will find the
380                 // Fixup is in the "cached" chunk, so the linear-search is seldom
381                 // executed.
382                 if (loc < cch->chloc || loc >= (cch->chloc + cch->ch_size))
383                 {
384                         for(cch=sc->sfcode; cch!=NULL; cch=cch->chnext)
385                         {
386                                 if (loc >= cch->chloc && loc < (cch->chloc + cch->ch_size))
387                                         break;
388                         }
389
390                         if (cch == NULL)
391                         {
392                                 // Fixup (loc) is out of range--this should never happen!
393                                 // Once we call this function, it winds down immediately; it
394                                 // doesn't return.
395                                 interror(7);
396                         }
397                 }
398
399                 // Location to fix (in current chunk)
400                 // We use the address of the chunk that loc is actually in, then
401                 // subtract the chunk's starting location from loc to get the offset
402                 // into the current chunk.
403                 uint8_t * locp = cch->chptr + (loc - cch->chloc);
404
405                 uint16_t eattr = 0;                     // Expression attrib
406                 SYM * esym = NULL;                      // External symbol involved in expr
407                 uint64_t eval;                          // Expression value
408                 uint16_t flags;                         // Mark flags
409
410                 // Compute expression/symbol value and attributes
411
412                 // Complex expression
413                 if (dw & FU_EXPR)
414                 {
415                         // evexpr presumably issues the errors/warnings here
416                         if (evexpr(fup->expr, &eval, &eattr, &esym) != OK)
417                                 continue;
418                 }
419                 // Simple symbol
420                 else
421                 {
422                         SYM * sy = fup->symbol;
423                         eattr = sy->sattr;
424
425                         if (eattr & DEFINED)
426                                 eval = sy->svalue;
427                         else
428                                 eval = 0;
429
430                         // If the symbol is not defined, but global, set esym to sy
431                         if ((eattr & (GLOBAL | DEFINED)) == GLOBAL)
432                                 esym = sy;
433
434                         DEBUG { printf("               name: %s, value: $%" PRIX64 "\n", sy->sname, sy->svalue); }
435                 }
436
437                 uint16_t tdb = eattr & TDB;
438
439                 // If the expression/symbol is undefined and no external symbol is
440                 // involved, then that's an error.
441                 if (!(eattr & DEFINED) && (esym == NULL))
442                 {
443                         error(undef_error);
444                         continue;
445                 }
446
447                 // Do the fixup
448                 //
449                 // If a PC-relative fixup is undefined, its value is *not* subtracted
450                 // from the location (that will happen in the linker when the external
451                 // reference is resolved).
452                 //
453                 // MWC expects PC-relative things to have the LOC subtracted from the
454                 // value, if the value is external (that is, undefined at this point).
455                 //
456                 // PC-relative fixups must be DEFINED and either in the same section
457                 // (whereupon the subtraction takes place) or ABS (with no subtract).
458                 if (dw & FU_PCREL)
459                 {
460                         if (eattr & DEFINED)
461                         {
462                                 if (tdb == sno)
463                                         eval -= loc;
464                                 else if (tdb)
465                                 {
466                                         // Allow cross-section PCREL fixups in Alcyon mode
467                                         if (prg_flag)
468                                         {
469                                                 switch (tdb)
470                                                 {
471                                                 case TEXT:
472 // Shouldn't there be a break here, since otherwise, it will point to the DATA section?
473 //                                                      break;
474                                                 case DATA:
475                                                         eval += sect[TEXT].sloc;
476                                                         break;
477                                                 case BSS:
478                                                         eval += sect[TEXT].sloc + sect[DATA].sloc;
479                                                         break;
480                                                 default:
481                                                         error("invalid section");
482                                                 break;
483                                                 }
484
485                                                 eval -= loc;
486                                         }
487                                         else
488                                         {
489                                                 error("PC-relative expr across sections");
490                                                 continue;
491                                         }
492                                 }
493
494                                 if (sbra_flag && (dw & FU_LBRA) && (eval + 0x80 < 0x100))
495                                         warn("unoptimized short branch");
496                         }
497                         else if (obj_format == MWC)
498                                 eval -= loc;
499
500                         tdb = 0;
501                         eattr &= ~TDB;
502                 }
503
504                 // Handle fixup classes
505                 switch (dw & FUMASK)
506                 {
507                 // FU_BBRA fixes up a one-byte branch offset.
508                 case FU_BBRA:
509                         if (!(eattr & DEFINED))
510                         {
511                                 error("external short branch");
512                                 continue;
513                         }
514
515                         eval -= 2;
516
517                         if (eval + 0x80 >= 0x100)
518                                 goto rangeErr;
519
520                         if (eval == 0)
521                         {
522                                 if (CHECK_OPTS(OPT_NULL_BRA))
523                                 {
524                                         // Just output a NOP
525                                         *locp++ = 0x4E;
526                                         *locp = 0x71;
527                                         continue;
528                                 }
529                                 else
530                                 {
531                                         error("illegal bra.s with zero offset");
532                                         continue;
533                                 }
534                         }
535
536                         *++locp = (uint8_t)eval;
537                         break;
538
539                 // Fixup one-byte value at locp + 1.
540                 case FU_WBYTE:
541                         locp++;
542                         // FALLTHROUGH
543
544                 // Fixup one-byte forward references
545                 case FU_BYTE:
546                         if (!(eattr & DEFINED))
547                         {
548                                 error("external byte reference");
549                                 continue;
550                         }
551
552                         if (tdb)
553                         {
554                                 error("non-absolute byte reference");
555                                 continue;
556                         }
557
558                         if ((dw & FU_PCREL) && ((eval + 0x80) >= 0x100))
559                                 goto rangeErr;
560
561                         if (dw & FU_SEXT)
562                         {
563                                 if ((eval + 0x100) >= 0x200)
564                                         goto rangeErr;
565                         }
566                         else if (eval >= 0x100)
567                                 goto rangeErr;
568
569                         *locp = (uint8_t)eval;
570                         break;
571
572                 // Fixup high/low byte off word for 6502
573                 case FU_BYTEH:
574                         if (!(eattr & DEFINED))
575                         {
576                                 error("external byte reference");
577                                 continue;
578                         }
579
580                         *locp = (uint8_t)(eval >> 8);
581                         break;
582
583                 case FU_BYTEL:
584                         if (!(eattr & DEFINED))
585                         {
586                                 error("external byte reference");
587                                 continue;
588                         }
589
590                         *locp = (uint8_t)eval;
591                         break;
592
593                 // Fixup WORD forward references; the word could be unaligned in the
594                 // section buffer, so we have to be careful. (? careful about what?)
595                 case FU_WORD:
596                         if ((dw & FUMASKRISC) == FU_JR)
597                         {
598                                 int reg = (signed)((eval - ((fup->orgaddr ? fup->orgaddr : loc) + 2)) / 2);
599
600                                 if ((reg < -16) || (reg > 15))
601                                 {
602                                         error("relative jump out of range");
603                                         break;
604                                 }
605
606                                 *locp |= ((uint8_t)reg >> 3) & 0x03;
607                                 locp++;
608                                 *locp |= ((uint8_t)reg & 0x07) << 5;
609                                 break;
610                         }
611                         else if ((dw & FUMASKRISC) == FU_NUM15)
612                         {
613                                 if (((int)eval < -16) || ((int)eval > 15))
614                                 {
615                                         error("constant out of range (-16 - +15)");
616                                         break;
617                                 }
618
619                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
620                                 locp++;
621                                 *locp |= ((uint8_t)eval & 0x07) << 5;
622                                 break;
623                         }
624                         else if ((dw & FUMASKRISC) == FU_NUM31)
625                         {
626                                 if (eval > 31)
627                                 {
628                                         error("constant out of range (0-31)");
629                                         break;
630                                 }
631
632                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
633                                 locp++;
634                                 *locp |= ((uint8_t)eval & 0x07) << 5;
635                                 break;
636                         }
637                         else if ((dw & FUMASKRISC) == FU_NUM32)
638                         {
639                                 if ((eval < 1) || (eval > 32))
640                                 {
641                                         error("constant out of range (1-32)");
642                                         break;
643                                 }
644
645                                 if (dw & FU_SUB32)
646                                         eval = (32 - eval);
647
648                                 eval = (eval == 32) ? 0 : eval;
649                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
650                                 locp++;
651                                 *locp |= ((uint8_t)eval & 0x07) << 5;
652                                 break;
653                         }
654                         else if ((dw & FUMASKRISC) == FU_REGONE)
655                         {
656                                 if (eval > 31)
657                                 {
658                                         error("register one value out of range");
659                                         break;
660                                 }
661
662                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
663                                 locp++;
664                                 *locp |= ((uint8_t)eval & 0x07) << 5;
665                                 break;
666                         }
667                         else if ((dw & FUMASKRISC) == FU_REGTWO)
668                         {
669                                 if (eval > 31)
670                                 {
671                                         error("register two value out of range");
672                                         break;
673                                 }
674
675                                 locp++;
676                                 *locp |= (uint8_t)eval & 0x1F;
677                                 break;
678                         }
679
680                         if (!(eattr & DEFINED))
681                         {
682                                 flags = MWORD;
683
684                                 if (dw & FU_PCREL)
685                                         flags |= MPCREL;
686
687                                 MarkRelocatable(sno, loc, 0, flags, esym);
688                         }
689                         else
690                         {
691                                 if (tdb)
692                                         MarkRelocatable(sno, loc, tdb, MWORD, NULL);
693
694                                 if (dw & FU_SEXT)
695                                 {
696                                         if (eval + 0x10000 >= 0x20000)
697                                                 goto rangeErr;
698                                 }
699                                 else
700                                 {
701                                         // Range-check BRA and DBRA
702                                         if (dw & FU_ISBRA)
703                                         {
704                                                 if (eval + 0x8000 >= 0x10000)
705                                                         goto rangeErr;
706                                         }
707                                         else if (eval >= 0x10000)
708                                                 goto rangeErr;
709                                 }
710                         }
711
712                         // 6502 words are little endian, so handle that here
713                         if (sno == M6502)
714                                 SETLE16(locp, 0, eval)
715                         else
716                                 SETBE16(locp, 0, eval)
717
718                         break;
719
720                 // Fixup LONG forward references; the long could be unaligned in the
721                 // section buffer, so be careful (again).
722                 case FU_LONG:
723                         flags = MLONG;
724
725                         if ((dw & FUMASKRISC) == FU_MOVEI)
726                         {
727                                 // Long constant in MOVEI # is word-swapped, so fix it here
728                                 eval = WORDSWAP32(eval);
729                                 flags |= MMOVEI;
730                         }
731
732                         // If the symbol is undefined, make sure to pass the symbol in
733                         // to the MarkRelocatable() function.
734                         if (!(eattr & DEFINED))
735                                 MarkRelocatable(sno, loc, 0, flags, esym);
736                         else if (tdb)
737                                 MarkRelocatable(sno, loc, tdb, flags, NULL);
738
739                         SETBE32(locp, 0, eval);
740                         break;
741
742                 // Fixup QUAD forward references (mainly used by the OP assembler)
743                 case FU_QUAD:
744                         if (dw & FU_OBJLINK)
745                         {
746                                 uint64_t quad = GETBE64(locp, 0);
747                                 uint64_t addr = eval;
748
749 //Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR...  :-/
750 //                              if (fup->orgaddr)
751 //                                      addr = fup->orgaddr;
752
753                                 eval = (quad & 0xFFFFFC0000FFFFFFLL) | ((addr & 0x3FFFF8) << 21);
754                         }
755                         else if (dw & FU_OBJDATA)
756                         {
757                                 // If it's in a TEXT or DATA section, be sure to mark for a
758                                 // fixup later
759                                 if (tdb)
760                                         MarkRelocatable(sno, loc, tdb, MQUAD, NULL);
761
762                                 uint64_t quad = GETBE64(locp, 0);
763                                 uint64_t addr = eval;
764
765 //Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR...  :-/
766 //                              if (fup->orgaddr)
767 //                                      addr = fup->orgaddr;
768
769                                 eval = (quad & 0x000007FFFFFFFFFFLL) | ((addr & 0xFFFFF8) << 40);
770                         }
771
772                         SETBE64(locp, 0, eval);
773                         break;
774
775                 // Fixup a 3-bit "QUICK" reference in bits 9..1
776                 // (range of 1..8) in a word. [Really bits 1..3 in a byte.]
777                 case FU_QUICK:
778                         if (!(eattr & DEFINED))
779                         {
780                                 error("External quick reference");
781                                 continue;
782                         }
783
784                         if ((eval < 1) || (eval > 8))
785                                 goto rangeErr;
786
787                         *locp |= (eval & 7) << 1;
788                         break;
789
790                 // Fix up 6502 funny branch
791                 case FU_6BRA:
792                         eval -= (loc + 1);
793
794                         if (eval + 0x80 >= 0x100)
795                                 goto rangeErr;
796
797                         *locp = (uint8_t)eval;
798                         break;
799
800                 // Fixup DSP56001 addresses
801                 case FU_56001:
802                         switch (dw & FUMASKDSP)
803                         {
804                         // DSPIMM5 actually is clamped from 0 to 23 for our purposes
805                         // and does not use the full 5 bit range.
806                         case FU_DSPIMM5:
807                                 if (eval > 23)
808                                 {
809                                         error("immediate value must be between 0 and 23");
810                                         break;
811                                 }
812
813                                 locp[2] |= eval;
814                                 break;
815
816                         // This is a 12-bit address encoded into the lower 12
817                         // bits of a DSP word
818                         case FU_DSPADR12:
819                                 if (eval >= 0x1000)
820                                 {
821                                         error("address out of range ($0-$FFF)");
822                                         break;
823                                 }
824
825                                 locp[1] |= eval >> 8;
826                                 locp[2] = eval & 0xFF;
827                                 break;
828
829                         // This is a full DSP word containing Effective Address Extension
830                         case FU_DSPADR24:
831                         case FU_DSPIMM24:
832                                 if (eval >= 0x1000000)
833                                 {
834                                         error("value out of range ($0-$FFFFFF)");
835                                         break;
836                                 }
837
838                                 locp[0] = (uint8_t)((eval >> 16) & 0xFF);
839                                 locp[1] = (uint8_t)((eval >> 8) & 0xFF);
840                                 locp[2] = (uint8_t)(eval & 0xFF);
841                                 break;
842
843                         // This is a 16bit absolute address into a 24bit field
844                         case FU_DSPADR16:
845                                 if (eval >= 0x10000)
846                                 {
847                                         error("address out of range ($0-$FFFF)");
848                                         break;
849                                 }
850
851                                 locp[1] = (uint8_t)(eval >> 8);
852                                 locp[2] = (uint8_t)eval;
853                                 break;
854
855                         // This is 12-bit immediate short data
856                         // The upper nibble goes into the last byte's low nibble
857                         // while the remainder 8 bits go into the 2nd byte.
858                         case FU_DSPIMM12:
859                                 if (eval >= 0x1000)
860                                 {
861                                         error("immediate out of range ($0-$FFF)");
862                                         break;
863                                 }
864
865                                 locp[1] = (uint8_t)eval;
866                                 locp[2] |= (uint8_t)(eval >> 8);
867                                 break;
868
869                         // This is 8-bit immediate short data
870                         // which goes into the middle byte of a DSP word.
871                         case FU_DSPIMM8:
872                                 if (eval >= 0x100)
873                                 {
874                                         error("immediate out of range ($0-$FF)");
875                                         break;
876                                 }
877
878                                 locp[1] = (uint8_t)eval;
879                                 break;
880
881                         // This is a 6 bit absoulte short address. It occupies
882                         // the low 6 bits of the middle byte of a DSP word.
883                         case FU_DSPADR06:
884                                 if (eval > 63)
885                                 {
886                                         error("address must be between 0 and 63");
887                                         break;
888                                 }
889
890                                 locp[1] |= eval;
891                                 break;
892
893                         // This is a 6 bit absoulte short address. It occupies
894                         // the low 6 bits of the middle byte of a DSP word.
895                         case FU_DSPPP06:
896                                 if (eval < 0xFFFFFFC0)
897                                 {
898                                         error("address must be between $FFC0 and $FFFF");
899                                         break;
900                                 }
901
902                                 locp[1] |= eval & 0x3F;
903                                 break;
904
905                         // Shamus: I'm pretty sure these don't make any sense...
906                         case FU_DSPIMMFL8:
907                                 warn("FU_DSPIMMFL8 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
908                                 break;
909
910                         case FU_DSPIMMFL16:
911                                 warn("FU_DSPIMMFL16 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
912                                 break;
913
914                         case FU_DSPIMMFL24:
915                                 warn("FU_DSPIMMFL24 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
916                                 break;
917
918                         // Bad fixup type--this should *never* happen!
919                         default:
920                                 interror(4);
921                                 // NOTREACHED
922                         }
923                         break;
924
925                 // Fixup a 4-byte float
926                 case FU_FLOATSING:
927                         warn("FU_FLOATSING missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
928                         break;
929
930                 // Fixup a 8-byte float
931                 case FU_FLOATDOUB:
932                         warn("FU_FLOATDOUB missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
933                         break;
934
935                 // Fixup a 12-byte float
936                 case FU_FLOATEXT:
937                         warn("FU_FLOATEXT missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
938                         break;
939
940                 default:
941                         // Bad fixup type--this should *never* happen!
942                         // Once we call this function, it winds down immediately; it
943                         // doesn't return.
944                         interror(4);
945                 }
946
947                 continue;
948 rangeErr:
949                 error("expression out of range");
950         }
951
952         return 0;
953 }
954
955
956 //
957 // Resolve all fixups
958 //
959 int ResolveAllFixups(void)
960 {
961         // Make undefined symbols GLOBL
962         if (glob_flag)
963                 ForceUndefinedSymbolsGlobal();
964
965         DEBUG printf("Resolving TEXT sections...\n");
966         ResolveFixups(TEXT);
967         DEBUG printf("Resolving DATA sections...\n");
968         ResolveFixups(DATA);
969         DEBUG printf("Resolving 6502 sections...\n");
970         ResolveFixups(M6502);           // Fixup 6502 section (if any)
971         DEBUG printf("Resolving DSP56001 P: sections...\n");
972         ResolveFixups(M56001P);         // Fixup 56001 P: section (if any)
973         DEBUG printf("Resolving DSP56001 X: sections...\n");
974         ResolveFixups(M56001X);         // Fixup 56001 X: section (if any)
975         DEBUG printf("Resolving DSP56001 Y: sections...\n");
976         ResolveFixups(M56001Y);         // Fixup 56001 Y: section (if any)
977
978         return 0;
979 }
980