2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // DIRECT.C - Directive Handling
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
25 TOKEN exprbuf[128]; // Expression buffer
26 SYM * symbolPtr[1000000]; // Symbol pointers table
27 static long unused; // For supressing 'write' warnings
28 char buffer[256]; // Scratch buffer for messages
31 // Directive handler table
42 (void *)d_init, // 9 init
44 (void *)d_goto, // 11 goto
45 (void *)d_dc, // 12 dc
46 (void *)d_ds, // 13 ds
47 d_undmac, // 14 undefmac
50 (void *)d_dcb, // 17 dcb
54 d_incbin, // 21 .incbin //load
55 d_unimpl, // 22 disable
56 d_unimpl, // 23 enable
58 d_regbank0, // 25 .regbank0
59 d_regbank1, // 26 .regbank1
61 d_assert, // 28 assert
63 d_unimpl, // 30* endif
66 d_include, // 33 include
68 d_unimpl, // 35* macro
69 ExitMacro, // 36* exitm
75 d_dphrase, // 42 struct
78 d_subttl, // 45 subttl
82 d_noclear, // 49 .noclear
83 d_equrundef, // 50 .equrundef/.regundef
84 d_ccundef, // 51 .ccundef
86 d_cstruct, // 53 .cstruct
87 d_jpad, // 54 .jpad (deprecated)
88 d_nojpad, // 55 .nojpad (deprecated)
89 d_gpumain, // 56 .gpumain (deprecated)
90 d_prgflags, // 57 .prgflags
96 // .error - Abort compilation, printing an error message
98 int d_error(char *str)
101 return error("error directive encountered - aborting assembling");
107 return error(string[tok[1]]);
110 return error("error directive encountered - aborting assembling");
117 // .warn - Just display a warning on screen
119 int d_warn(char *str)
122 return warn("WARNING WARNING WARNING");
128 return warn(string[tok[1]]);
131 return warn("WARNING WARNING WARNING");
145 return error(".org permitted only in gpu/dsp section");
149 if (abs_expr(&address) == ERROR)
151 error("cannot determine org'd address");
157 //printf("ORG: address = $%08X...\n", orgaddr);
168 char prntstr[LNSIZ]; // String for PRINT directive
169 char format[LNSIZ]; // Format for PRINT directive
170 int formatting = 0; // Formatting on/off
171 int wordlong = 0; // WORD = 0, LONG = 1
172 int outtype = 0; // 0:hex, 1:decimal, 2:unsigned
174 VALUE eval; // Expression value
175 WORD eattr; // Expression attributes
176 SYM * esym; // External symbol involved in expr.
177 TOKEN r_expr[EXPRSIZE];
184 sprintf(prntstr, "%s", string[tok[1]]);
185 printf("%s", prntstr);
188 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
195 if (tok[1] != SYMBOL)
198 // strcpy(prntstr, (char *)tok[2]);
199 strcpy(prntstr, string[tok[2]]);
203 case 'l': case 'L': wordlong = 1; break;
204 case 'w': case 'W': wordlong = 0; break;
205 case 'x': case 'X': outtype = 0; break;
206 case 'd': case 'D': outtype = 1; break;
207 case 'u': case 'U': outtype = 2; break;
209 error("unknown print format flag");
219 if (expr(r_expr, &eval, &eattr, &esym) != OK)
225 case 0: strcpy(format, "%X"); break;
226 case 1: strcpy(format, "%d" ); break;
227 case 2: strcpy(format, "%u" ); break;
231 sprintf(prntstr, format, eval);
233 sprintf(prntstr, format, eval & 0xFFFF);
235 printf("%s", prntstr);
238 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
254 error("illegal print token");
260 // Undefine an equated condition code
266 // Check that we are in a RISC section
269 error(".ccundef must be defined in .gpu/.dsp section");
275 error("syntax error; expected symbol");
279 ccname = lookup(string[tok[1]], LABEL, 0);
281 // Make sure symbol is a valid ccdef
282 if (!ccname || !(ccname->sattre & EQUATEDCC))
284 error("invalid equated condition name specified");
288 ccname->sattre |= UNDEF_CC;
295 // Undefine an equated register
297 int d_equrundef(void)
301 // Check that we are in a RISC section
303 return error(".equrundef/.regundef must be defined in .gpu/.dsp section");
307 // Skip preceeding or seperating commas (if any)
311 // Check we are dealing with a symbol
313 return error("syntax error; expected symbol");
315 // Lookup and undef if equated register
316 regname = lookup(string[tok[1]], LABEL, 0);
318 if (regname && (regname->sattre & EQUATEDREG))
320 // Reset the attributes of this symbol...
322 regname->sattre &= ~(EQUATEDREG | BANK_0 | BANK_1);
323 regname->sattre |= UNDEF_EQUR;
326 // Skip over symbol token and address
335 // Do not allow use of the CLR.L opcode
339 warn("CLR.L opcode ignored...");
345 // Include binary file
351 long pos, size, bytesRead;
354 // Check to see if we're in BSS, and, if so, throw an error
357 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
363 error("syntax error; string missing");
367 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
369 errors("cannot open include binary file (%s)", string[tok[1]]);
373 size = lseek(fd, 0L, SEEK_END);
374 pos = lseek(fd, 0L, SEEK_SET);
377 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
379 char * fileBuffer = (char *)malloc(size);
380 bytesRead = read(fd, fileBuffer, size);
382 if (bytesRead != size)
384 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
389 memcpy(chptr, fileBuffer, size);
404 // Set RISC register banks
408 // Set active register bank zero
416 // Set active register bank one
423 // Helper function, to cut down on mistakes & typing
425 static inline void SkipBytes(unsigned bytesToSkip)
430 if ((scattr & SBSS) == 0)
432 chcheck(bytesToSkip);
433 D_ZEROFILL(bytesToSkip);
440 orgaddr += bytesToSkip;
446 // Adjust location to an EVEN value
450 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
454 if ((scattr & SBSS) == 0)
473 // Adjust location to a LONG value
477 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
478 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
479 SkipBytes(bytesToSkip);
486 // Adjust location to a PHRASE value
488 // N.B.: We have to handle the GPU/DSP cases separately because you can embed
489 // RISC code in the middle of a regular 68K section. Also note that all
490 // of the alignment pseudo-ops will have to be fixed this way.
492 // This *must* behave differently when in a RISC section, as following sloc
493 // (instead of orgaddr) will fuck things up royally. Note that we do it this
494 // way because you can embed RISC code in a 68K section, and have the origin
495 // pointing to a different alignment in the RISC section than the 68K section.
499 unsigned lower3Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x07;
500 unsigned bytesToSkip = (0x08 - lower3Bits) & 0x07;
501 SkipBytes(bytesToSkip);
508 // Adjust location to a DPHRASE value
512 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
513 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
514 SkipBytes(bytesToSkip);
521 // Adjust location to a QPHRASE value
525 unsigned lower5Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x1F;
526 unsigned bytesToSkip = (0x20 - lower5Bits) & 0x1F;
527 SkipBytes(bytesToSkip);
534 // Do auto-even. This must be called ONLY if 'sloc' is odd.
536 // This is made hairy because, if there was a label on the line, we also have
537 // to adjust its value. This won't work with more than one label on the line,
538 // which is OK since multiple labels are only allowed in AS68 kludge mode, and
539 // the C compiler is VERY paranoid and uses ".even" whenever it can
541 // N.B.: This probably needs the same fixes as above...
546 sloc++; // Bump BSS section
548 D_byte(0); // Deposit 0.b in non-BSS
550 if (lab_sym != NULL) // Bump label if we have to
556 // Unimplemened directive error
560 return error("unimplemented directive");
565 // Return absolute (not TDB) and defined expression or return an error
567 int abs_expr(VALUE * a_eval)
571 if (expr(exprbuf, a_eval, &eattr, NULL) < 0)
574 if (!(eattr & DEFINED))
575 return error(undef_error);
578 return error(rel_error);
585 // Hand symbols in a symbol-list to a function (kind of like mapcar...)
587 int symlist(int(* func)())
589 const char * em = "symbol list syntax";
596 if ((*func)(string[tok[1]]) != OK)
615 // .include "filename"
625 if (*tok == STRING) // Leave strings ALONE
627 else if (*tok == SYMBOL) // Try to append ".s" to symbols
629 strcpy(buf, string[*++tok]);
633 else // Punt if no STRING or SYMBOL
634 return error("missing filename");
636 // Make sure the user didn't try anything like:
637 // .include equates.s
639 return error("extra stuff after filename -- enclose it in quotes");
641 // Attempt to open the include file in the current directory, then (if that
642 // failed) try list of include files passed in the enviroment string or by
644 if ((j = open(fn, 0)) < 0)
646 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
650 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
651 strcat(buf1, SLASHSTRING);
655 if ((j = open(buf1, 0)) >= 0)
659 return errors("cannot open: \"%s\"", fn);
669 // .assert expression [, expression...]
676 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
678 if (!(eattr & DEFINED))
679 return error("forward or undefined .assert");
682 return error("assert failure");
694 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
701 return error("cannot .globl local symbol");
703 if ((sy = lookup(p, LABEL, 0)) == NULL)
705 sy = NewSymbol(p, LABEL, 0);
708 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
725 // .prgflags expression
732 return error("PRGFLAGS requires value");
733 else if (abs_expr(&eval) == OK)
740 return error("PRGFLAGS requires value");
756 else if (abs_expr(&eval) != OK)
771 return error("directive forbidden in gpu/dsp mode");
786 return error("directive forbidden in gpu/dsp mode");
801 return error("directive forbidden in gpu/dsp mode");
814 // .ds[.size] expression
818 DEBUG { printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc); }
822 // This gets kind of stupid. This directive is disallowed in normal 68000
823 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
824 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
826 if (as68_flag == 0 && (scattr & SBSS) == 0)
827 return error(".ds permitted only in BSS");
829 if (siz != SIZB && (sloc & 1)) // Automatic .even
832 if (abs_expr(&eval) != OK)
835 // Check to see if the value being passed in is negative (who the hell does
836 // that?--nobody does; it's the code gremlins, or rum, that does it)
838 return error("negative sizes not allowed");
840 // In non-TDB section (BSS, ABS and M6502) just advance the location
841 // counter appropriately. In TDB sections, deposit (possibly large) chunks
842 // of zeroed memory....
848 just_bss = 1; // No data deposited (8-bit CPU mode)
852 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
861 // dc.b, dc.w / dc, dc.l
871 int movei = 0; // movei flag for dc.i
873 if ((scattr & SBSS) != 0)
874 return error("illegal initialization of section");
876 // Do an auto_even if it's not BYTE sized (hmm, should we be doing this???)
877 if ((siz != SIZB) && (sloc & 1))
880 // Check to see if we're trying to set LONGS on a non 32-bit aligned
881 // address in a GPU or DSP section, in their local RAM
882 if ((siz == SIZL) && (orgaddr & 0x03)
883 && ((rgpu && (orgaddr >= 0xF03000) && (orgaddr <= 0xF03FFFF))
884 || (rdsp && (orgaddr >= 0xF1B000) && (orgaddr <= 0xF1CFFFF))))
885 warn("depositing LONGs on a non-long address in local RAM");
889 // dc.b 'string' [,] ...
890 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
892 i = strlen(string[tok[1]]);
894 if ((challoc - ch_size) < i)
897 for(p=string[tok[1]]; *p!=EOS; ++p)
912 if (expr(exprbuf, &eval, &eattr, NULL) != OK)
915 tdb = (WORD)(eattr & TDB);
916 defined = (WORD)(eattr & DEFINED);
918 if ((challoc - ch_size) < 4)
926 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
932 return error("non-absolute byte value");
934 if (eval + 0x100 >= 0x200)
936 sprintf(buffer, "%s (value = $%X)", range_error, eval);
937 return error(buffer);
948 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
954 rmark(cursect, sloc, tdb, MWORD, NULL);
956 if (eval + 0x10000 >= 0x20000)
957 return error(range_error);
959 // Deposit 68000 or 6502 (byte-reversed) word
968 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
970 AddFixup(FU_LONG, sloc, exprbuf);
977 rmark(cursect, sloc, tdb, MLONG, NULL);
980 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
998 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
1005 DEBUG { printf("dcb: section is %s%s%s (scattr=$%X)\n", (cursect & TEXT ? "TEXT" : ""), (cursect & DATA ? " DATA" : ""), (cursect & BSS ? "BSS" : ""), scattr); }
1007 if ((scattr & SBSS) != 0)
1008 return error("illegal initialization of section");
1010 if (abs_expr(&evalc) != OK)
1014 return error("missing comma");
1016 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
1019 if ((siz != SIZB) && (sloc & 1))
1022 dep_block(evalc, siz, eval, eattr, exprbuf);
1028 // Generalized initialization directive
1030 // .init[.siz] [#count,] expression [.size] , ...
1032 // The size suffix on the ".init" directive becomes the default size of the
1033 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
1034 // and an expression, it specifies a repeat count. The value to be deposited
1035 // may be followed by a size suffix, which overrides the default size.
1037 int d_init(WORD def_siz)
1044 if ((scattr & SBSS) != 0)
1045 return error(".init not permitted in BSS or ABS");
1048 return error("directive forbidden in gpu/dsp mode");
1052 // Get repeat count (defaults to 1)
1057 if (abs_expr(&count) != OK)
1061 return error(comma_error);
1066 // Evaluate expression to deposit
1067 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
1070 switch ((int)*tok++)
1071 { // Determine size of object to deposit
1072 case DOTB: siz = SIZB; break;
1073 case DOTW: siz = SIZB; break;
1074 case DOTL: siz = SIZL; break;
1081 dep_block(count, siz, eval, eattr, exprbuf);
1091 return error(comma_error);
1098 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1100 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1105 tdb = (WORD)(eattr & TDB);
1106 defined = (WORD)(eattr & DEFINED);
1110 if ((challoc - ch_size) < 4)
1118 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1124 return error("non-absolute byte value");
1126 if (eval + 0x100 >= 0x200)
1127 return error(range_error);
1137 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1143 rmark(cursect, sloc, tdb, MWORD, NULL);
1145 if (eval + 0x10000 >= 0x20000)
1146 return error(range_error);
1148 // Deposit 68000 or 6502 (byte-reversed) word
1156 AddFixup(FU_LONG, sloc, exprbuf);
1162 rmark(cursect, sloc, tdb, MLONG, NULL);
1176 // .comm symbol, size
1185 return error("missing symbol");
1190 if (*p == '.') // Cannot .comm a local symbol
1191 return error(locgl_error);
1193 if ((sym = lookup(p, LABEL, 0)) == NULL)
1194 sym = NewSymbol(p, LABEL, 0);
1197 if (sym->sattr & DEFINED)
1198 return error(".comm symbol already defined");
1201 sym->sattr = GLOBAL | COMMON | BSS;
1204 return error(comma_error);
1206 if (abs_expr(&eval) != OK) // Parse size of common region
1209 sym->svalue = eval; // Install common symbol's size
1216 // .list - Turn listing on
1228 // .nlist - Turn listing off
1240 // .68000 - Back to 68000 TEXT segment
1245 // Switching from gpu/dsp sections should reset any ORG'd Address
1249 SwitchSection(TEXT);
1255 // .gpu - Switch to GPU assembler
1259 if ((cursect != TEXT) && (cursect != DATA))
1261 error(".gpu can only be used in the TEXT or DATA segments");
1265 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1268 //printf("Resetting ORG...\n");
1272 //else printf("NOT resetting ORG!\n");
1274 rgpu = 1; // Set GPU assembly
1275 rdsp = 0; // Unset DSP assembly
1276 regbank = BANK_N; // Set no default register bank
1282 // .dsp - Switch to DSP assembler
1286 if ((cursect != TEXT) && (cursect != DATA))
1288 error(".dsp can only be used in the TEXT or DATA segments");
1292 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1299 rdsp = 1; // Set DSP assembly
1300 rgpu = 0; // Unset GPU assembly
1301 regbank = BANK_N; // Set no default register bank
1307 // .cargs [#offset], symbol[.size], ...
1309 // Lists of registers may also be mentioned; they just take up space. Good for
1310 // "documentation" purposes:
1312 // .cargs a6, .arg1, .arg2, .arg3...
1314 // Symbols thus created are ABS and EQUATED.
1318 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1327 return error("directive forbidden in gpu/dsp mode");
1333 if (abs_expr(&eval) != OK)
1336 // Eat the comma, if it's there
1347 // Set env to either local (dot prefixed) or global scope
1348 env = (*p == '.' ? curenv : 0);
1349 symbol = lookup(p, LABEL, env);
1353 symbol = NewSymbol(p, LABEL, env);
1356 else if (symbol->sattr & DEFINED)
1357 return errors("multiply-defined label '%s'", p);
1359 // Put symbol in "order of definition" list
1360 AddToSymbolDeclarationList(symbol);
1362 symbol->sattr |= (ABS | DEFINED | EQUATED);
1363 symbol->svalue = eval;
1366 // What this does is eat any dot suffixes attached to a symbol. If
1367 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1368 // there is no dot suffix, it assumes a size of 2.
1380 else if (*tok >= KW_D0 && *tok <= KW_A7)
1382 if (reglist(&rlist) < 0)
1385 for(i=0; i<16; i++, rlist>>=1)
1408 return error(".cargs syntax");
1412 // Eat commas in between each argument, if they exist
1420 // .cstruct [#offset], symbol[.size], ...
1422 // Lists of registers may also be mentioned; they just take up space. Good for
1423 // "documentation" purposes:
1425 // .cstruct a6, .arg1, .arg2, .arg3...
1427 // Symbols thus created are ABS and EQUATED. Note that this is for
1428 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1433 VALUE eval = 0; // Default, if no offset specified, is zero
1441 return error("directive forbidden in gpu/dsp mode");
1447 if (abs_expr(&eval) != OK)
1450 // Eat the comma, if it's there
1459 symbolName = string[tok[1]];
1461 // Set env to either local (dot prefixed) or global scope
1462 env = (symbolName[0] == '.' ? curenv : 0);
1463 symbol = lookup(symbolName, LABEL, env);
1465 // If the symbol wasn't found, then define it. Otherwise, throw an
1469 symbol = NewSymbol(symbolName, LABEL, env);
1472 else if (symbol->sattr & DEFINED)
1473 return errors("multiply-defined label '%s'", symbolName);
1475 // Put symbol in "order of definition" list
1476 AddToSymbolDeclarationList(symbol);
1480 // Adjust label start address if it's a word or a long, as a byte
1481 // label might have left us on an odd address.
1486 eval += eval & 0x01;
1489 symbol->sattr |= (ABS | DEFINED | EQUATED);
1490 symbol->svalue = eval;
1492 // Check for dot suffixes and adjust space accordingly (longs and
1493 // words on an odd boundary get bumped to the next word aligned
1494 // address). If no suffix, then throw an error.
1507 return error("Symbol missing dot suffix in .cstruct construct");
1512 else if (*tok >= KW_D0 && *tok <= KW_A7)
1514 if (reglist(&rlist) < 0)
1517 for(i=0; i<16; i++, rlist>>=1)
1540 return error(".cstruct syntax");
1544 // Eat commas in between each argument, if they exist
1552 // Undefine a macro - .undefmac macname [, macname...]
1554 int undmac1(char * p)
1556 SYM * symbol = lookup(p, MACRO, 0);
1558 // If the macro symbol exists, cause it to disappear
1559 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1561 symbol->stype = (BYTE)SY_UNDEF;
1576 warn("JPAD directive is deprecated/non-functional");
1583 warn("NOJPAD directive is deprecated/non-functional");
1590 return error("What the hell? Do you think we adhere to the Goof standard?");
1594 // .opt - turn a specific (or all) optimisation on or off
1605 tmpstr = string[*tok++];
1607 if (ParseOptimization(tmpstr) != OK)
1610 sprintf(temperr, "unknown optimisation flag '%s'.", tmpstr);
1611 return error(temperr);
1615 return error(".opt directive needs every switch enclosed inside quotation marks.");