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
47 d_undmac, // 14 undefmac
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)
101 return error(".org permitted only in gpu/dsp section");
105 if (abs_expr(&address) == ERROR)
107 error("cannot determine org'd address");
113 //printf("ORG: address = $%08X...\n", orgaddr);
124 char prntstr[LNSIZ]; // String for PRINT directive
125 char format[LNSIZ]; // Format for PRINT directive
126 int formatting = 0; // Formatting on/off
127 int wordlong = 0; // WORD = 0, LONG = 1
128 int outtype = 0; // 0:hex, 1:decimal, 2:unsigned
130 VALUE eval; // Expression value
131 WORD eattr; // Expression attributes
132 SYM * esym; // External symbol involved in expr.
133 TOKEN r_expr[EXPRSIZE];
140 sprintf(prntstr, "%s", string[tok[1]]);
141 printf("%s", prntstr);
144 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
151 if (tok[1] != SYMBOL)
154 // strcpy(prntstr, (char *)tok[2]);
155 strcpy(prntstr, string[tok[2]]);
159 case 'l': case 'L': wordlong = 1; break;
160 case 'w': case 'W': wordlong = 0; break;
161 case 'x': case 'X': outtype = 0; break;
162 case 'd': case 'D': outtype = 1; break;
163 case 'u': case 'U': outtype = 2; break;
165 error("unknown print format flag");
175 if (expr(r_expr, &eval, &eattr, &esym) != OK)
181 case 0: strcpy(format, "%X"); break;
182 case 1: strcpy(format, "%d" ); break;
183 case 2: strcpy(format, "%u" ); break;
187 sprintf(prntstr, format, eval);
189 sprintf(prntstr, format, eval & 0xFFFF);
191 printf("%s", prntstr);
194 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
210 error("illegal print token");
216 // Undefine an equated condition code
222 // Check that we are in a RISC section
225 error(".ccundef must be defined in .gpu/.dsp section");
231 error("syntax error; expected symbol");
235 ccname = lookup(string[tok[1]], LABEL, 0);
237 // Make sure symbol is a valid ccdef
238 if (!ccname || !(ccname->sattre & EQUATEDCC))
240 error("invalid equated condition name specified");
244 ccname->sattre |= UNDEF_CC;
251 // Undefine an equated register
253 int d_equrundef(void)
257 // Check that we are in a RISC section
259 return error(".equrundef/.regundef must be defined in .gpu/.dsp section");
263 // Skip preceeding or seperating commas (if any)
267 // Check we are dealing with a symbol
269 return error("syntax error; expected symbol");
271 // Lookup and undef if equated register
272 regname = lookup(string[tok[1]], LABEL, 0);
274 if (regname && (regname->sattre & EQUATEDREG))
276 // Reset the attributes of this symbol...
278 regname->sattre &= ~(EQUATEDREG | BANK_0 | BANK_1);
279 regname->sattre |= UNDEF_EQUR;
282 // Skip over symbol token and address
291 // Do not allow use of the CLR.L opcode
295 warn("CLR.L opcode ignored...");
301 // Include binary file
307 long pos, size, bytesRead;
310 // Check to see if we're in BSS, and, if so, throw an error
313 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
319 error("syntax error; string missing");
323 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
325 errors("cannot open include binary file (%s)", string[tok[1]]);
329 size = lseek(fd, 0L, SEEK_END);
330 pos = lseek(fd, 0L, SEEK_SET);
333 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
335 char * fileBuffer = (char *)malloc(size);
336 bytesRead = read(fd, fileBuffer, size);
338 if (bytesRead != size)
340 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
345 memcpy(chptr, fileBuffer, size);
360 // Set RISC register banks
364 // Set active register bank zero
372 // Set active register bank one
379 // Helper function, to cut down on mistakes & typing
381 static inline void SkipBytes(unsigned bytesToSkip)
386 if ((scattr & SBSS) == 0)
388 chcheck(bytesToSkip);
389 D_ZEROFILL(bytesToSkip);
396 orgaddr += bytesToSkip;
402 // Adjust location to an EVEN value
406 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
410 if ((scattr & SBSS) == 0)
429 // Adjust location to a LONG value
433 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
434 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
435 SkipBytes(bytesToSkip);
442 // Adjust location to a PHRASE value
444 // N.B.: We have to handle the GPU/DSP cases separately because you can embed
445 // RISC code in the middle of a regular 68K section. Also note that all
446 // of the alignment pseudo-ops will have to be fixed this way.
448 // This *must* behave differently when in a RISC section, as following sloc
449 // (instead of orgaddr) will fuck things up royally. Note that we do it this
450 // way because you can embed RISC code in a 68K section, and have the origin
451 // pointing to a different alignment in the RISC section than the 68K section.
455 unsigned lower3Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x07;
456 unsigned bytesToSkip = (0x08 - lower3Bits) & 0x07;
457 SkipBytes(bytesToSkip);
464 // Adjust location to a DPHRASE value
468 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
469 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
470 SkipBytes(bytesToSkip);
477 // Adjust location to a QPHRASE value
481 unsigned lower5Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x1F;
482 unsigned bytesToSkip = (0x20 - lower5Bits) & 0x1F;
483 SkipBytes(bytesToSkip);
490 // Do auto-even. This must be called ONLY if 'sloc' is odd.
492 // This is made hairy because, if there was a label on the line, we also have
493 // to adjust its value. This won't work with more than one label on the line,
494 // which is OK since multiple labels are only allowed in AS68 kludge mode, and
495 // the C compiler is VERY paranoid and uses ".even" whenever it can
497 // N.B.: This probably needs the same fixes as above...
502 sloc++; // Bump BSS section
504 D_byte(0); // Deposit 0.b in non-BSS
506 if (lab_sym != NULL) // Bump label if we have to
512 // Unimplemened directive error
516 return error("unimplemented directive");
521 // Return absolute (not TDB) and defined expression or return an error
523 int abs_expr(VALUE * a_eval)
527 if (expr(exprbuf, a_eval, &eattr, NULL) < 0)
530 if (!(eattr & DEFINED))
531 return error(undef_error);
534 return error(rel_error);
541 // Hand symbols in a symbol-list to a function (kind of like mapcar...)
543 int symlist(int(* func)())
545 const char * em = "symbol list syntax";
552 if ((*func)(string[tok[1]]) != OK)
571 // .include "filename"
581 if (*tok == STRING) // Leave strings ALONE
583 else if (*tok == SYMBOL) // Try to append ".s" to symbols
585 strcpy(buf, string[*++tok]);
589 else // Punt if no STRING or SYMBOL
590 return error("missing filename");
592 // Make sure the user didn't try anything like:
593 // .include equates.s
595 return error("extra stuff after filename -- enclose it in quotes");
597 // Attempt to open the include file in the current directory, then (if that
598 // failed) try list of include files passed in the enviroment string or by
600 if ((j = open(fn, 0)) < 0)
602 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
606 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
607 strcat(buf1, SLASHSTRING);
611 if ((j = open(buf1, 0)) >= 0)
615 return errors("cannot open: \"%s\"", fn);
625 // .assert expression [, expression...]
632 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
634 if (!(eattr & DEFINED))
635 return error("forward or undefined .assert");
638 return error("assert failure");
650 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
657 return error("cannot .globl local symbol");
659 if ((sy = lookup(p, LABEL, 0)) == NULL)
661 sy = NewSymbol(p, LABEL, 0);
664 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
691 else if (abs_expr(&eval) != OK)
706 return error("directive forbidden in gpu/dsp mode");
721 return error("directive forbidden in gpu/dsp mode");
736 return error("directive forbidden in gpu/dsp mode");
749 // .ds[.size] expression
754 printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc);
758 // This gets kind of stupid. This directive is disallowed in normal 68000
759 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
760 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
762 if (as68_flag == 0 && (scattr & SBSS) == 0)
763 return error(".ds permitted only in BSS");
765 if (siz != SIZB && (sloc & 1)) // Automatic .even
768 if (abs_expr(&eval) != OK)
771 // In non-TDB section (BSS, ABS and M6502) just advance the location
772 // counter appropriately. In TDB sections, deposit (possibly large) chunks
773 //of zeroed memory....
779 just_bss = 1; // No data deposited (8-bit CPU mode)
783 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
792 // dc.b, dc.w / dc, dc.l
802 int movei = 0; // movei flag for dc.i
804 if ((scattr & SBSS) != 0)
805 return error("illegal initialization of section");
807 // Do an auto_even if it's not BYTE sized (hmm, should we be doing this???)
808 if ((siz != SIZB) && (sloc & 1))
811 // Check to see if we're trying to set LONGS on a non 32-bit aligned
812 // address in a GPU or DSP section, in their local RAM
813 if ((siz == SIZL) && (orgaddr & 0x03)
814 && ((rgpu && (orgaddr >= 0xF03000) && (orgaddr <= 0xF03FFFF))
815 || (rdsp && (orgaddr >= 0xF1B000) && (orgaddr <= 0xF1CFFFF))))
816 warn("depositing LONGs on a non-long address in local RAM");
820 // dc.b 'string' [,] ...
821 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
823 i = strlen(string[tok[1]]);
825 if ((challoc - ch_size) < i)
828 for(p=string[tok[1]]; *p!=EOS; ++p)
843 if (expr(exprbuf, &eval, &eattr, NULL) != OK)
846 tdb = (WORD)(eattr & TDB);
847 defined = (WORD)(eattr & DEFINED);
849 if ((challoc - ch_size) < 4)
857 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
863 return error("non-absolute byte value");
865 if (eval + 0x100 >= 0x200)
867 sprintf(buffer, "%s (value = $%X)", range_error, eval);
868 return error(buffer);
879 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
885 rmark(cursect, sloc, tdb, MWORD, NULL);
887 if (eval + 0x10000 >= 0x20000)
888 return error(range_error);
890 // Deposit 68000 or 6502 (byte-reversed) word
899 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
901 AddFixup(FU_LONG, sloc, exprbuf);
908 rmark(cursect, sloc, tdb, MLONG, NULL);
911 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
929 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
936 if ((scattr & SBSS) != 0)
937 return error("illegal initialization of section");
939 if (abs_expr(&evalc) != OK)
943 return error("missing comma");
945 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
948 if ((siz != SIZB) && (sloc & 1))
951 dep_block(evalc, siz, eval, eattr, exprbuf);
957 // Generalized initialization directive
959 // .init[.siz] [#count,] expression [.size] , ...
961 // The size suffix on the ".init" directive becomes the default size of the
962 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
963 // and an expression, it specifies a repeat count. The value to be deposited
964 // may be followed by a size suffix, which overrides the default size.
966 int d_init(WORD def_siz)
973 if ((scattr & SBSS) != 0)
974 return error(".init not permitted in BSS or ABS");
977 return error("directive forbidden in gpu/dsp mode");
981 // Get repeat count (defaults to 1)
986 if (abs_expr(&count) != OK)
990 return error(comma_error);
995 // Evaluate expression to deposit
996 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
1000 { // Determine size of object to deposit
1001 case DOTB: siz = SIZB; break;
1002 case DOTW: siz = SIZB; break;
1003 case DOTL: siz = SIZL; break;
1010 dep_block(count, siz, eval, eattr, exprbuf);
1020 return error(comma_error);
1027 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1029 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1034 tdb = (WORD)(eattr & TDB);
1035 defined = (WORD)(eattr & DEFINED);
1039 if ((challoc - ch_size) < 4)
1047 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1053 return error("non-absolute byte value");
1055 if (eval + 0x100 >= 0x200)
1056 return error(range_error);
1066 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1072 rmark(cursect, sloc, tdb, MWORD, NULL);
1074 if (eval + 0x10000 >= 0x20000)
1075 return error(range_error);
1077 // Deposit 68000 or 6502 (byte-reversed) word
1085 AddFixup(FU_LONG, sloc, exprbuf);
1091 rmark(cursect, sloc, tdb, MLONG, NULL);
1105 // .comm symbol, size
1114 return error("missing symbol");
1119 if (*p == '.') // Cannot .comm a local symbol
1120 return error(locgl_error);
1122 if ((sym = lookup(p, LABEL, 0)) == NULL)
1123 sym = NewSymbol(p, LABEL, 0);
1126 if (sym->sattr & DEFINED)
1127 return error(".comm symbol already defined");
1130 sym->sattr = GLOBAL | COMMON | BSS;
1133 return error(comma_error);
1135 if (abs_expr(&eval) != OK) // Parse size of common region
1138 sym->svalue = eval; // Install common symbol's size
1145 // .list - Turn listing on
1157 // .nlist - Turn listing off
1169 // .68000 - Back to 68000 TEXT segment
1174 // Switching from gpu/dsp sections should reset any ORG'd Address
1178 SwitchSection(TEXT);
1184 // .gpu - Switch to GPU assembler
1188 if ((cursect != TEXT) && (cursect != DATA))
1190 error(".gpu can only be used in the TEXT or DATA segments");
1194 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1197 //printf("Resetting ORG...\n");
1201 //else printf("NOT resetting ORG!\n");
1203 rgpu = 1; // Set GPU assembly
1204 rdsp = 0; // Unset DSP assembly
1205 regbank = BANK_N; // Set no default register bank
1211 // .dsp - Switch to DSP assembler
1215 if ((cursect != TEXT) && (cursect != DATA))
1217 error(".dsp can only be used in the TEXT or DATA segments");
1221 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1228 rdsp = 1; // Set DSP assembly
1229 rgpu = 0; // Unset GPU assembly
1230 regbank = BANK_N; // Set no default register bank
1236 // .cargs [#offset], symbol[.size], ...
1238 // Lists of registers may also be mentioned; they just take up space. Good for
1239 // "documentation" purposes:
1241 // .cargs a6, .arg1, .arg2, .arg3...
1243 // Symbols thus created are ABS and EQUATED.
1247 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1256 return error("directive forbidden in gpu/dsp mode");
1262 if (abs_expr(&eval) != OK)
1265 // Eat the comma, if it's there
1276 // Set env to either local (dot prefixed) or global scope
1277 env = (*p == '.' ? curenv : 0);
1278 symbol = lookup(p, LABEL, env);
1282 symbol = NewSymbol(p, LABEL, env);
1285 else if (symbol->sattr & DEFINED)
1286 return errors("multiply-defined label '%s'", p);
1288 // Put symbol in "order of definition" list
1289 AddToSymbolDeclarationList(symbol);
1291 symbol->sattr |= (ABS | DEFINED | EQUATED);
1292 symbol->svalue = eval;
1295 // What this does is eat any dot suffixes attached to a symbol. If
1296 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1297 // there is no dot suffix, it assumes a size of 2.
1309 else if (*tok >= KW_D0 && *tok <= KW_A7)
1311 if (reglist(&rlist) < 0)
1314 for(i=0; i<16; i++, rlist>>=1)
1337 return error(".cargs syntax");
1341 // Eat commas in between each argument, if they exist
1349 // .cstruct [#offset], symbol[.size], ...
1351 // Lists of registers may also be mentioned; they just take up space. Good for
1352 // "documentation" purposes:
1354 // .cstruct a6, .arg1, .arg2, .arg3...
1356 // Symbols thus created are ABS and EQUATED. Note that this is for
1357 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1362 VALUE eval = 0; // Default, if no offset specified, is zero
1370 return error("directive forbidden in gpu/dsp mode");
1376 if (abs_expr(&eval) != OK)
1379 // Eat the comma, if it's there
1388 symbolName = string[tok[1]];
1390 // Set env to either local (dot prefixed) or global scope
1391 env = (symbolName[0] == '.' ? curenv : 0);
1392 symbol = lookup(symbolName, LABEL, env);
1394 // If the symbol wasn't found, then define it. Otherwise, throw an
1398 symbol = NewSymbol(symbolName, LABEL, env);
1401 else if (symbol->sattr & DEFINED)
1402 return errors("multiply-defined label '%s'", symbolName);
1404 // Put symbol in "order of definition" list
1405 AddToSymbolDeclarationList(symbol);
1409 // Adjust label start address if it's a word or a long, as a byte
1410 // label might have left us on an odd address.
1415 eval += eval & 0x01;
1418 symbol->sattr |= (ABS | DEFINED | EQUATED);
1419 symbol->svalue = eval;
1421 // Check for dot suffixes and adjust space accordingly (longs and
1422 // words on an odd boundary get bumped to the next word aligned
1423 // address). If no suffix, then throw an error.
1436 return error("Symbol missing dot suffix in .cstruct construct");
1441 else if (*tok >= KW_D0 && *tok <= KW_A7)
1443 if (reglist(&rlist) < 0)
1446 for(i=0; i<16; i++, rlist>>=1)
1469 return error(".cstruct syntax");
1473 // Eat commas in between each argument, if they exist
1481 // Undefine a macro - .undefmac macname [, macname...]
1483 int undmac1(char * p)
1485 SYM * symbol = lookup(p, MACRO, 0);
1487 // If the macro symbol exists, cause it to disappear
1488 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1490 symbol->stype = (BYTE)SY_UNDEF;
1505 warn("JPAD directive is deprecated/non-functional");
1512 warn("NOJPAD directive is deprecated/non-functional");
1519 return error("What the hell? Do you think we adhere to the Goof standard?");