Introducing new switch -fr which outputs binaries assembled at a given address.
[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, 2011-2020 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source utilised with the kind permission of Landon Dyer
7 //
8
9 #include "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                 // PC-relative fixups must be DEFINED and either in the same section
454                 // (whereupon the subtraction takes place) or ABS (with no subtract).
455                 if ((dw & FU_PCREL) || (dw & FU_PCRELX))
456                 {
457                         if (eattr & DEFINED)
458                         {
459                                 if (tdb == sno)
460                                 {
461                                         eval -= loc;
462
463                                         // In this instruction the PC is located a DWORD away
464                                         if (dw & FU_PCRELX)
465                                                 eval += 2;
466                                 }
467                                 else if (tdb)
468                                 {
469                                         // Allow cross-section PCREL fixups in Alcyon mode
470                                         if (prg_flag || (obj_format == RAW))
471                                         {
472                                                 switch (tdb)
473                                                 {
474                                                 case TEXT:
475 // Shouldn't there be a break here, since otherwise, it will point to the DATA section?
476 //                                                      break;
477                                                 case DATA:
478                                                         eval += sect[TEXT].sloc;
479                                                         break;
480                                                 case BSS:
481                                                         eval += sect[TEXT].sloc + sect[DATA].sloc;
482                                                         break;
483                                                 default:
484                                                         error("invalid section");
485                                                 break;
486                                                 }
487
488                                                 eval -= loc;
489
490                                                 // In this instruction the PC is located a DWORD away
491                                                 if (dw & FU_PCRELX)
492                                                         eval += 2;
493                                         }
494                                         else
495                                         {
496                                                 error("PC-relative expr across sections");
497                                                 continue;
498                                         }
499                                 }
500
501                                 if (sbra_flag && (dw & FU_LBRA) && (eval + 0x80 < 0x100))
502                                         warn("unoptimized short branch");
503                         }
504
505                         // Be sure to clear any TDB flags, since we handled it just now
506                         tdb = 0;
507                         eattr &= ~TDB;
508                 }
509
510                 // Handle fixup classes
511                 switch (dw & FUMASK)
512                 {
513                 // FU_BBRA fixes up a one-byte branch offset.
514                 case FU_BBRA:
515                         if (!(eattr & DEFINED))
516                         {
517                                 error("external short branch");
518                                 continue;
519                         }
520
521                         eval -= 2;
522
523                         if (eval + 0x80 >= 0x100)
524                                 goto rangeErr;
525
526                         if (eval == 0)
527                         {
528                                 if (CHECK_OPTS(OPT_NULL_BRA))
529                                 {
530                                         // Just output a NOP
531                                         *locp++ = 0x4E;
532                                         *locp = 0x71;
533                                         continue;
534                                 }
535                                 else
536                                 {
537                                         error("illegal bra.s with zero offset");
538                                         continue;
539                                 }
540                         }
541
542                         *++locp = (uint8_t)eval;
543                         break;
544
545                 // Fixup one-byte value at locp + 1.
546                 case FU_WBYTE:
547                         locp++;
548                         // FALLTHROUGH
549
550                 // Fixup one-byte forward references
551                 case FU_BYTE:
552                         if (!(eattr & DEFINED))
553                         {
554                                 error("external byte reference");
555                                 continue;
556                         }
557
558                         if (tdb)
559                         {
560                                 error("non-absolute byte reference");
561                                 continue;
562                         }
563
564                         if ((dw & FU_PCREL) && ((eval + 0x80) >= 0x100))
565                                 goto rangeErr;
566
567                         if (dw & FU_SEXT)
568                         {
569                                 if ((eval + 0x100) >= 0x200)
570                                         goto rangeErr;
571                         }
572                         else if (eval >= 0x100)
573                                 goto rangeErr;
574
575                         *locp = (uint8_t)eval;
576                         break;
577
578                 // Fixup high/low byte off word for 6502
579                 case FU_BYTEH:
580                         if (!(eattr & DEFINED))
581                         {
582                                 error("external byte reference");
583                                 continue;
584                         }
585
586                         *locp = (uint8_t)(eval >> 8);
587                         break;
588
589                 case FU_BYTEL:
590                         if (!(eattr & DEFINED))
591                         {
592                                 error("external byte reference");
593                                 continue;
594                         }
595
596                         *locp = (uint8_t)eval;
597                         break;
598
599                 // Fixup WORD forward references; the word could be unaligned in the
600                 // section buffer, so we have to be careful. (? careful about what?)
601                 case FU_WORD:
602                         if ((dw & FUMASKRISC) == FU_JR)
603                         {
604                                 int reg = (signed)((eval - ((fup->orgaddr ? fup->orgaddr : loc) + 2)) / 2);
605
606                                 if ((reg < -16) || (reg > 15))
607                                 {
608                                         error("relative jump out of range");
609                                         break;
610                                 }
611
612                                 *locp |= ((uint8_t)reg >> 3) & 0x03;
613                                 locp++;
614                                 *locp |= ((uint8_t)reg & 0x07) << 5;
615                                 break;
616                         }
617                         else if ((dw & FUMASKRISC) == FU_NUM15)
618                         {
619                                 if (((int)eval < -16) || ((int)eval > 15))
620                                 {
621                                         error("constant out of range (-16 - +15)");
622                                         break;
623                                 }
624
625                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
626                                 locp++;
627                                 *locp |= ((uint8_t)eval & 0x07) << 5;
628                                 break;
629                         }
630                         else if ((dw & FUMASKRISC) == FU_NUM31)
631                         {
632                                 if (eval > 31)
633                                 {
634                                         error("constant out of range (0-31)");
635                                         break;
636                                 }
637
638                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
639                                 locp++;
640                                 *locp |= ((uint8_t)eval & 0x07) << 5;
641                                 break;
642                         }
643                         else if ((dw & FUMASKRISC) == FU_NUM32)
644                         {
645                                 if ((eval < 1) || (eval > 32))
646                                 {
647                                         error("constant out of range (1-32)");
648                                         break;
649                                 }
650
651                                 if (dw & FU_SUB32)
652                                         eval = (32 - eval);
653
654                                 eval = (eval == 32) ? 0 : eval;
655                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
656                                 locp++;
657                                 *locp |= ((uint8_t)eval & 0x07) << 5;
658                                 break;
659                         }
660                         else if ((dw & FUMASKRISC) == FU_REGONE)
661                         {
662                                 if (eval > 31)
663                                 {
664                                         error("register one value out of range");
665                                         break;
666                                 }
667
668                                 *locp |= ((uint8_t)eval >> 3) & 0x03;
669                                 locp++;
670                                 *locp |= ((uint8_t)eval & 0x07) << 5;
671                                 break;
672                         }
673                         else if ((dw & FUMASKRISC) == FU_REGTWO)
674                         {
675                                 if (eval > 31)
676                                 {
677                                         error("register two value out of range");
678                                         break;
679                                 }
680
681                                 locp++;
682                                 *locp |= (uint8_t)eval & 0x1F;
683                                 break;
684                         }
685
686                         if (!(eattr & DEFINED))
687                         {
688                                 flags = MWORD;
689
690                                 if (dw & FU_PCREL)
691                                         flags |= MPCREL;
692
693                                 MarkRelocatable(sno, loc, 0, flags, esym);
694                         }
695                         else
696                         {
697                                 if (tdb)
698                                         MarkRelocatable(sno, loc, tdb, MWORD, NULL);
699
700                                 if (dw & FU_SEXT)
701                                 {
702                                         if (eval + 0x10000 >= 0x20000)
703                                                 goto rangeErr;
704                                 }
705                                 else
706                                 {
707                                         // Range-check BRA and DBRA
708                                         if (dw & FU_ISBRA)
709                                         {
710                                                 if (eval + 0x8000 >= 0x10000)
711                                                         goto rangeErr;
712                                         }
713                                         else if (eval >= 0x10000)
714                                                 goto rangeErr;
715                                 }
716                         }
717
718                         // 6502 words are little endian, so handle that here
719                         if (sno == M6502)
720                                 SETLE16(locp, 0, eval)
721                         else
722                                 SETBE16(locp, 0, eval)
723
724                         break;
725
726                 // Fixup LONG forward references; the long could be unaligned in the
727                 // section buffer, so be careful (again).
728                 case FU_LONG:
729                         flags = MLONG;
730
731                         if ((dw & FUMASKRISC) == FU_MOVEI)
732                         {
733                                 // Long constant in MOVEI # is word-swapped, so fix it here
734                                 eval = WORDSWAP32(eval);
735                                 flags |= MMOVEI;
736                         }
737
738                         // If the symbol is undefined, make sure to pass the symbol in
739                         // to the MarkRelocatable() function.
740                         if (!(eattr & DEFINED))
741                                 MarkRelocatable(sno, loc, 0, flags, esym);
742                         else if (tdb)
743                                 MarkRelocatable(sno, loc, tdb, flags, NULL);
744
745                         SETBE32(locp, 0, eval);
746                         break;
747
748                 // Fixup QUAD forward references (mainly used by the OP assembler)
749                 case FU_QUAD:
750                         if (dw & FU_OBJLINK)
751                         {
752                                 uint64_t quad = GETBE64(locp, 0);
753                                 uint64_t addr = eval;
754
755 //Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR...  :-/
756 //                              if (fup->orgaddr)
757 //                                      addr = fup->orgaddr;
758
759                                 eval = (quad & 0xFFFFFC0000FFFFFFLL) | ((addr & 0x3FFFF8) << 21);
760                         }
761                         else if (dw & FU_OBJDATA)
762                         {
763                                 // If it's in a TEXT or DATA section, be sure to mark for a
764                                 // fixup later
765                                 if (tdb)
766                                         MarkRelocatable(sno, loc, tdb, MQUAD, NULL);
767
768                                 uint64_t quad = GETBE64(locp, 0);
769                                 uint64_t addr = eval;
770
771 //Hmm, not sure how this can be set, since it's only set if it's a DSP56001 fixup or a FU_JR...  :-/
772 //                              if (fup->orgaddr)
773 //                                      addr = fup->orgaddr;
774
775                                 eval = (quad & 0x000007FFFFFFFFFFLL) | ((addr & 0xFFFFF8) << 40);
776                         }
777
778                         SETBE64(locp, 0, eval);
779                         break;
780
781                 // Fixup a 3-bit "QUICK" reference in bits 9..1
782                 // (range of 1..8) in a word. [Really bits 1..3 in a byte.]
783                 case FU_QUICK:
784                         if (!(eattr & DEFINED))
785                         {
786                                 error("External quick reference");
787                                 continue;
788                         }
789
790                         if ((eval < 1) || (eval > 8))
791                                 goto rangeErr;
792
793                         *locp |= (eval & 7) << 1;
794                         break;
795
796                 // Fix up 6502 funny branch
797                 case FU_6BRA:
798                         eval -= (loc + 1);
799
800                         if (eval + 0x80 >= 0x100)
801                                 goto rangeErr;
802
803                         *locp = (uint8_t)eval;
804                         break;
805
806                 // Fixup DSP56001 addresses
807                 case FU_56001:
808                         switch (dw & FUMASKDSP)
809                         {
810                         // DSPIMM5 actually is clamped from 0 to 23 for our purposes
811                         // and does not use the full 5 bit range.
812                         case FU_DSPIMM5:
813                                 if (eval > 23)
814                                 {
815                                         error("immediate value must be between 0 and 23");
816                                         break;
817                                 }
818
819                                 locp[2] |= eval;
820                                 break;
821
822                         // This is a 12-bit address encoded into the lower 12
823                         // bits of a DSP word
824                         case FU_DSPADR12:
825                                 if (eval >= 0x1000)
826                                 {
827                                         error("address out of range ($0-$FFF)");
828                                         break;
829                                 }
830
831                                 locp[1] |= eval >> 8;
832                                 locp[2] = eval & 0xFF;
833                                 break;
834
835                         // This is a full DSP word containing Effective Address Extension
836                         case FU_DSPADR24:
837                         case FU_DSPIMM24:
838                                 if (eval >= 0x1000000)
839                                 {
840                                         error("value out of range ($0-$FFFFFF)");
841                                         break;
842                                 }
843
844                                 locp[0] = (uint8_t)((eval >> 16) & 0xFF);
845                                 locp[1] = (uint8_t)((eval >> 8) & 0xFF);
846                                 locp[2] = (uint8_t)(eval & 0xFF);
847                                 break;
848
849                         // This is a 16bit absolute address into a 24bit field
850                         case FU_DSPADR16:
851                                 if (eval >= 0x10000)
852                                 {
853                                         error("address out of range ($0-$FFFF)");
854                                         break;
855                                 }
856
857                                 locp[1] = (uint8_t)(eval >> 8);
858                                 locp[2] = (uint8_t)eval;
859                                 break;
860
861                         // This is 12-bit immediate short data
862                         // The upper nibble goes into the last byte's low nibble
863                         // while the remainder 8 bits go into the 2nd byte.
864                         case FU_DSPIMM12:
865                                 if (eval >= 0x1000)
866                                 {
867                                         error("immediate out of range ($0-$FFF)");
868                                         break;
869                                 }
870
871                                 locp[1] = (uint8_t)eval;
872                                 locp[2] |= (uint8_t)(eval >> 8);
873                                 break;
874
875                         // This is 8-bit immediate short data
876                         // which goes into the middle byte of a DSP word.
877                         case FU_DSPIMM8:
878                                 if (eval >= 0x100)
879                                 {
880                                         error("immediate out of range ($0-$FF)");
881                                         break;
882                                 }
883
884                                 locp[1] = (uint8_t)eval;
885                                 break;
886
887                         // This is a 6 bit absoulte short address. It occupies
888                         // the low 6 bits of the middle byte of a DSP word.
889                         case FU_DSPADR06:
890                                 if (eval > 63)
891                                 {
892                                         error("address must be between 0 and 63");
893                                         break;
894                                 }
895
896                                 locp[1] |= eval;
897                                 break;
898
899                         // This is a 6 bit absoulte short address. It occupies
900                         // the low 6 bits of the middle byte of a DSP word.
901                         case FU_DSPPP06:
902                                 if (eval < 0xFFFFFFC0)
903                                 {
904                                         error("address must be between $FFC0 and $FFFF");
905                                         break;
906                                 }
907
908                                 locp[1] |= eval & 0x3F;
909                                 break;
910
911                         // Shamus: I'm pretty sure these don't make any sense...
912                         case FU_DSPIMMFL8:
913                                 warn("FU_DSPIMMFL8 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
914                                 break;
915
916                         case FU_DSPIMMFL16:
917                                 warn("FU_DSPIMMFL16 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
918                                 break;
919
920                         case FU_DSPIMMFL24:
921                                 warn("FU_DSPIMMFL24 missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
922                                 break;
923
924                         // Bad fixup type--this should *never* happen!
925                         default:
926                                 interror(4);
927                                 // NOTREACHED
928                         }
929                         break;
930
931                 // Fixup a 4-byte float
932                 case FU_FLOATSING:
933                         warn("FU_FLOATSING missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
934                         break;
935
936                 // Fixup a 8-byte float
937                 case FU_FLOATDOUB:
938                         warn("FU_FLOATDOUB missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
939                         break;
940
941                 // Fixup a 12-byte float
942                 case FU_FLOATEXT:
943                         warn("FU_FLOATEXT missing implementation\n%s", "And you may ask yourself, \"Self, how did I get here?\"");
944                         break;
945
946                 default:
947                         // Bad fixup type--this should *never* happen!
948                         // Once we call this function, it winds down immediately; it
949                         // doesn't return.
950                         interror(4);
951                 }
952
953                 continue;
954 rangeErr:
955                 error("expression out of range");
956         }
957
958         return 0;
959 }
960
961
962 //
963 // Resolve all fixups
964 //
965 int ResolveAllFixups(void)
966 {
967         // Make undefined symbols GLOBL
968         if (glob_flag)
969                 ForceUndefinedSymbolsGlobal();
970
971         DEBUG printf("Resolving TEXT sections...\n");
972         ResolveFixups(TEXT);
973         DEBUG printf("Resolving DATA sections...\n");
974         ResolveFixups(DATA);
975         DEBUG printf("Resolving 6502 sections...\n");
976         ResolveFixups(M6502);           // Fixup 6502 section (if any)
977         DEBUG printf("Resolving DSP56001 P: sections...\n");
978         ResolveFixups(M56001P);         // Fixup 56001 P: section (if any)
979         DEBUG printf("Resolving DSP56001 X: sections...\n");
980         ResolveFixups(M56001X);         // Fixup 56001 X: section (if any)
981         DEBUG printf("Resolving DSP56001 Y: sections...\n");
982         ResolveFixups(M56001Y);         // Fixup 56001 Y: section (if any)
983
984         return 0;
985 }
986