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
300 // Include binary file
306 long pos, size, bytesRead;
309 // Check to see if we're in BSS, and, if so, throw an error
312 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
318 error("syntax error; string missing");
322 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
324 errors("cannot open include binary file (%s)", string[tok[1]]);
328 size = lseek(fd, 0L, SEEK_END);
329 pos = lseek(fd, 0L, SEEK_SET);
332 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
334 char * fileBuffer = (char *)malloc(size);
335 bytesRead = read(fd, fileBuffer, size);
337 if (bytesRead != size)
339 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
344 memcpy(chptr, fileBuffer, size);
359 // Set RISC register banks
363 // Set active register bank zero
371 // Set active register bank one
378 // Helper function, to cut down on mistakes & typing
380 static inline void SkipBytes(unsigned bytesToSkip)
385 if ((scattr & SBSS) == 0)
387 chcheck(bytesToSkip);
388 D_ZEROFILL(bytesToSkip);
395 orgaddr += bytesToSkip;
401 // Adjust location to an EVEN value
405 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
409 if ((scattr & SBSS) == 0)
428 // Adjust location to a LONG value
432 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
433 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
434 SkipBytes(bytesToSkip);
441 // Adjust location to a PHRASE value
443 // N.B.: We have to handle the GPU/DSP cases separately because you can embed
444 // RISC code in the middle of a regular 68K section. Also note that all
445 // of the alignment pseudo-ops will have to be fixed this way.
447 // This *must* behave differently when in a RISC section, as following sloc
448 // (instead of orgaddr) will fuck things up royally. Note that we do it this
449 // way because you can embed RISC code in a 68K section, and have the origin
450 // pointing to a different alignment in the RISC section than the 68K section.
454 unsigned lower3Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x07;
455 unsigned bytesToSkip = (0x08 - lower3Bits) & 0x07;
456 SkipBytes(bytesToSkip);
463 // Adjust location to a DPHRASE value
467 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
468 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
469 SkipBytes(bytesToSkip);
476 // Adjust location to a QPHRASE value
480 unsigned lower5Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x1F;
481 unsigned bytesToSkip = (0x20 - lower5Bits) & 0x1F;
482 SkipBytes(bytesToSkip);
489 // Do auto-even. This must be called ONLY if 'sloc' is odd.
491 // This is made hairy because, if there was a label on the line, we also have
492 // to adjust its value. This won't work with more than one label on the line,
493 // which is OK since multiple labels are only allowed in AS68 kludge mode, and
494 // the C compiler is VERY paranoid and uses ".even" whenever it can
496 // N.B.: This probably needs the same fixes as above...
501 sloc++; // Bump BSS section
503 D_byte(0); // Deposit 0.b in non-BSS
505 if (lab_sym != NULL) // Bump label if we have to
511 // Unimplemened directive error
515 return error("unimplemented directive");
520 // Return absolute (not TDB) and defined expression or return an error
522 int abs_expr(VALUE * a_eval)
526 if (expr(exprbuf, a_eval, &eattr, NULL) < 0)
529 if (!(eattr & DEFINED))
530 return error(undef_error);
533 return error(rel_error);
540 // Hand symbols in a symbol-list to a function (kind of like mapcar...)
542 int symlist(int(* func)())
544 const char * em = "symbol list syntax";
551 if ((*func)(string[tok[1]]) != OK)
570 // .include "filename"
580 if (*tok == STRING) // Leave strings ALONE
582 else if (*tok == SYMBOL) // Try to append ".s" to symbols
584 strcpy(buf, string[*++tok]);
588 else // Punt if no STRING or SYMBOL
589 return error("missing filename");
591 // Make sure the user didn't try anything like:
592 // .include equates.s
594 return error("extra stuff after filename -- enclose it in quotes");
596 // Attempt to open the include file in the current directory, then (if that
597 // failed) try list of include files passed in the enviroment string or by
599 if ((j = open(fn, 0)) < 0)
601 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
605 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
606 strcat(buf1, SLASHSTRING);
610 if ((j = open(buf1, 0)) >= 0)
614 return errors("cannot open: \"%s\"", fn);
624 // .assert expression [, expression...]
631 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
633 if (!(eattr & DEFINED))
634 return error("forward or undefined .assert");
637 return error("assert failure");
649 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
656 return error("cannot .globl local symbol");
658 if ((sy = lookup(p, LABEL, 0)) == NULL)
660 sy = NewSymbol(p, LABEL, 0);
663 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
690 else if (abs_expr(&eval) != OK)
705 return error("directive forbidden in gpu/dsp mode");
720 return error("directive forbidden in gpu/dsp mode");
735 return error("directive forbidden in gpu/dsp mode");
748 // .ds[.size] expression
753 printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc);
757 // This gets kind of stupid. This directive is disallowed in normal 68000
758 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
759 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
761 if (as68_flag == 0 && (scattr & SBSS) == 0)
762 return error(".ds permitted only in BSS");
764 if (siz != SIZB && (sloc & 1)) // Automatic .even
767 if (abs_expr(&eval) != OK)
770 // In non-TDB section (BSS, ABS and M6502) just advance the location
771 // counter appropriately. In TDB sections, deposit (possibly large) chunks
772 //of zeroed memory....
778 just_bss = 1; // No data deposited (8-bit CPU mode)
782 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
791 // dc.b, dc.w / dc, dc.l
801 int movei = 0; // movei flag for dc.i
803 if ((scattr & SBSS) != 0)
804 return error("illegal initialization of section");
806 if ((siz != SIZB) && (sloc & 1))
811 // dc.b 'string' [,] ...
812 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
814 i = strlen(string[tok[1]]);
816 if ((challoc - ch_size) < i)
819 for(p=string[tok[1]]; *p!=EOS; ++p)
834 if (expr(exprbuf, &eval, &eattr, NULL) != OK)
837 tdb = (WORD)(eattr & TDB);
838 defined = (WORD)(eattr & DEFINED);
840 if ((challoc - ch_size) < 4)
848 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
854 return error("non-absolute byte value");
856 if (eval + 0x100 >= 0x200)
858 sprintf(buffer, "%s (value = $%X)", range_error, eval);
859 // return error(range_error);
860 return error(buffer);
871 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
877 rmark(cursect, sloc, tdb, MWORD, NULL);
879 if (eval + 0x10000 >= 0x20000)
880 return error(range_error);
882 // Deposit 68000 or 6502 (byte-reversed) word
891 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
893 AddFixup(FU_LONG, sloc, exprbuf);
900 rmark(cursect, sloc, tdb, MLONG, NULL);
903 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
921 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
928 if ((scattr & SBSS) != 0)
929 return error("illegal initialization of section");
931 if (abs_expr(&evalc) != OK)
935 return error("missing comma");
937 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
940 if ((siz != SIZB) && (sloc & 1))
943 dep_block(evalc, siz, eval, eattr, exprbuf);
949 // Generalized initialization directive
951 // .init[.siz] [#count,] expression [.size] , ...
953 // The size suffix on the ".init" directive becomes the default size of the
954 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
955 // and an expression, it specifies a repeat count. The value to be deposited
956 // may be followed by a size suffix, which overrides the default size.
958 int d_init(WORD def_siz)
965 if ((scattr & SBSS) != 0)
966 return error(".init not permitted in BSS or ABS");
969 return error("directive forbidden in gpu/dsp mode");
973 // Get repeat count (defaults to 1)
978 if (abs_expr(&count) != OK)
982 return error(comma_error);
987 // Evaluate expression to deposit
988 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
992 { // Determine size of object to deposit
993 case DOTB: siz = SIZB; break;
994 case DOTW: siz = SIZB; break;
995 case DOTL: siz = SIZL; break;
1002 dep_block(count, siz, eval, eattr, exprbuf);
1012 return error(comma_error);
1019 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1021 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1026 tdb = (WORD)(eattr & TDB);
1027 defined = (WORD)(eattr & DEFINED);
1031 if ((challoc - ch_size) < 4)
1039 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1045 return error("non-absolute byte value");
1047 if (eval + 0x100 >= 0x200)
1048 return error(range_error);
1058 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1064 rmark(cursect, sloc, tdb, MWORD, NULL);
1066 if (eval + 0x10000 >= 0x20000)
1067 return error(range_error);
1069 // Deposit 68000 or 6502 (byte-reversed) word
1077 AddFixup(FU_LONG, sloc, exprbuf);
1083 rmark(cursect, sloc, tdb, MLONG, NULL);
1097 // .comm symbol, size
1106 return error("missing symbol");
1111 if (*p == '.') // Cannot .comm a local symbol
1112 return error(locgl_error);
1114 if ((sym = lookup(p, LABEL, 0)) == NULL)
1115 sym = NewSymbol(p, LABEL, 0);
1118 if (sym->sattr & DEFINED)
1119 return error(".comm symbol already defined");
1122 sym->sattr = GLOBAL | COMMON | BSS;
1125 return error(comma_error);
1127 if (abs_expr(&eval) != OK) // Parse size of common region
1130 sym->svalue = eval; // Install common symbol's size
1137 // .list - Turn listing on
1149 // .nlist - Turn listing off
1161 // .68000 - Back to 68000 TEXT segment
1166 // Switching from gpu/dsp sections should reset any ORG'd Address
1170 SwitchSection(TEXT);
1176 // .gpu - Switch to GPU assembler
1180 if ((cursect != TEXT) && (cursect != DATA))
1182 error(".gpu can only be used in the TEXT or DATA segments");
1186 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1189 //printf("Resetting ORG...\n");
1193 //else printf("NOT resetting ORG!\n");
1195 rgpu = 1; // Set GPU assembly
1196 rdsp = 0; // Unset DSP assembly
1197 regbank = BANK_N; // Set no default register bank
1203 // .dsp - Switch to DSP assembler
1207 if ((cursect != TEXT) && (cursect != DATA))
1209 error(".dsp can only be used in the TEXT or DATA segments");
1213 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1220 rdsp = 1; // Set DSP assembly
1221 rgpu = 0; // Unset GPU assembly
1222 regbank = BANK_N; // Set no default register bank
1228 // .cargs [#offset], symbol[.size], ...
1230 // Lists of registers may also be mentioned; they just take up space. Good for
1231 // "documentation" purposes:
1233 // .cargs a6, .arg1, .arg2, .arg3...
1235 // Symbols thus created are ABS and EQUATED.
1239 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1248 return error("directive forbidden in gpu/dsp mode");
1254 if (abs_expr(&eval) != OK)
1257 // Eat the comma, if it's there
1268 // Set env to either local (dot prefixed) or global scope
1269 env = (*p == '.' ? curenv : 0);
1270 symbol = lookup(p, LABEL, env);
1274 symbol = NewSymbol(p, LABEL, env);
1277 else if (symbol->sattr & DEFINED)
1278 return errors("multiply-defined label '%s'", p);
1280 // Put symbol in "order of definition" list
1281 AddToSymbolDeclarationList(symbol);
1283 symbol->sattr |= (ABS | DEFINED | EQUATED);
1284 symbol->svalue = eval;
1287 // What this does is eat any dot suffixes attached to a symbol. If
1288 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1289 // there is no dot suffix, it assumes a size of 2.
1301 else if (*tok >= KW_D0 && *tok <= KW_A7)
1303 if (reglist(&rlist) < 0)
1306 for(i=0; i<16; i++, rlist>>=1)
1329 return error(".cargs syntax");
1333 // Eat commas in between each argument, if they exist
1341 // .cstruct [#offset], symbol[.size], ...
1343 // Lists of registers may also be mentioned; they just take up space. Good for
1344 // "documentation" purposes:
1346 // .cstruct a6, .arg1, .arg2, .arg3...
1348 // Symbols thus created are ABS and EQUATED. Note that this is for
1349 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1354 VALUE eval = 0; // Default, if no offset specified, is zero
1362 return error("directive forbidden in gpu/dsp mode");
1368 if (abs_expr(&eval) != OK)
1371 // Eat the comma, if it's there
1380 symbolName = string[tok[1]];
1382 // Set env to either local (dot prefixed) or global scope
1383 env = (symbolName[0] == '.' ? curenv : 0);
1384 symbol = lookup(symbolName, LABEL, env);
1386 // If the symbol wasn't found, then define it. Otherwise, throw an
1390 symbol = NewSymbol(symbolName, LABEL, env);
1393 else if (symbol->sattr & DEFINED)
1394 return errors("multiply-defined label '%s'", symbolName);
1396 // Put symbol in "order of definition" list
1397 AddToSymbolDeclarationList(symbol);
1401 // Adjust label start address if it's a word or a long, as a byte
1402 // label might have left us on an odd address.
1407 eval += eval & 0x01;
1410 symbol->sattr |= (ABS | DEFINED | EQUATED);
1411 symbol->svalue = eval;
1413 // Check for dot suffixes and adjust space accordingly (longs and
1414 // words on an odd boundary get bumped to the next word aligned
1415 // address). If no suffix, then throw an error.
1428 return error("Symbol missing dot suffix in .cstruct construct");
1433 else if (*tok >= KW_D0 && *tok <= KW_A7)
1435 if (reglist(&rlist) < 0)
1438 for(i=0; i<16; i++, rlist>>=1)
1461 return error(".cstruct syntax");
1465 // Eat commas in between each argument, if they exist
1473 // Undefine a macro - .undefmac macname [, macname...]
1475 int undmac1(char * p)
1477 SYM * symbol = lookup(p, MACRO, 0);
1479 // If the macro symbol exists, cause it to disappear
1480 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1482 symbol->stype = (BYTE)SY_UNDEF;
1497 warn("JPAD directive is deprecated/non-functional");
1504 warn("NOJPAD directive is deprecated/non-functional");
1511 return error("What the hell? Do you think we adhere to the Goof standard?");