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
102 return error(".org permitted only in gpu/dsp section");
106 if (abs_expr(&address) == ERROR)
108 error("cannot determine org'd address");
114 //printf("ORG: address = $%08X...\n", orgaddr);
125 char prntstr[LNSIZ]; // String for PRINT directive
126 char format[LNSIZ]; // Format for PRINT directive
127 int formatting = 0; // Formatting on/off
128 int wordlong = 0; // WORD = 0, LONG = 1
129 int outtype = 0; // 0:hex, 1:decimal, 2:unsigned
131 VALUE eval; // Expression value
132 WORD eattr; // Expression attributes
133 SYM * esym; // External symbol involved in expr.
134 TOKEN r_expr[EXPRSIZE];
141 sprintf(prntstr, "%s", string[tok[1]]);
142 printf("%s", prntstr);
145 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
152 if (tok[1] != SYMBOL)
155 // strcpy(prntstr, (char *)tok[2]);
156 strcpy(prntstr, string[tok[2]]);
160 case 'l': case 'L': wordlong = 1; break;
161 case 'w': case 'W': wordlong = 0; break;
162 case 'x': case 'X': outtype = 0; break;
163 case 'd': case 'D': outtype = 1; break;
164 case 'u': case 'U': outtype = 2; break;
166 error("unknown print format flag");
176 if (expr(r_expr, &eval, &eattr, &esym) != OK)
182 case 0: strcpy(format, "%X"); break;
183 case 1: strcpy(format, "%d" ); break;
184 case 2: strcpy(format, "%u" ); break;
188 sprintf(prntstr, format, eval);
190 sprintf(prntstr, format, eval & 0xFFFF);
192 printf("%s", prntstr);
195 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
211 error("illegal print token");
217 // Undefine an equated condition code
223 // Check that we are in a RISC section
226 error(".ccundef must be defined in .gpu/.dsp section");
232 error("syntax error; expected symbol");
236 ccname = lookup(string[tok[1]], LABEL, 0);
238 // Make sure symbol is a valid ccdef
239 if (!ccname || !(ccname->sattre & EQUATEDCC))
241 error("invalid equated condition name specified");
245 ccname->sattre |= UNDEF_CC;
252 // Undefine an equated register
254 int d_equrundef(void)
258 // Check that we are in a RISC section
260 return error(".equrundef/.regundef must be defined in .gpu/.dsp section");
264 // Skip preceeding or seperating commas (if any)
268 // Check we are dealing with a symbol
270 return error("syntax error; expected symbol");
272 // Lookup and undef if equated register
273 regname = lookup(string[tok[1]], LABEL, 0);
275 if (regname && (regname->sattre & EQUATEDREG))
277 // Reset the attributes of this symbol...
279 regname->sattre &= ~(EQUATEDREG | BANK_0 | BANK_1);
280 regname->sattre |= UNDEF_EQUR;
283 // Skip over symbol token and address
292 // Do not allow use of the CLR.L opcode
296 warn("CLR.L opcode ignored...");
302 // Include binary file
308 long pos, size, bytesRead;
311 // Check to see if we're in BSS, and, if so, throw an error
314 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
320 error("syntax error; string missing");
324 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
326 errors("cannot open include binary file (%s)", string[tok[1]]);
330 size = lseek(fd, 0L, SEEK_END);
331 pos = lseek(fd, 0L, SEEK_SET);
334 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
336 char * fileBuffer = (char *)malloc(size);
337 bytesRead = read(fd, fileBuffer, size);
339 if (bytesRead != size)
341 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
346 memcpy(chptr, fileBuffer, size);
361 // Set RISC register banks
365 // Set active register bank zero
373 // Set active register bank one
380 // Helper function, to cut down on mistakes & typing
382 static inline void SkipBytes(unsigned bytesToSkip)
387 if ((scattr & SBSS) == 0)
389 chcheck(bytesToSkip);
390 D_ZEROFILL(bytesToSkip);
397 orgaddr += bytesToSkip;
403 // Adjust location to an EVEN value
407 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
411 if ((scattr & SBSS) == 0)
430 // Adjust location to a LONG value
434 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
435 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
436 SkipBytes(bytesToSkip);
443 // Adjust location to a PHRASE value
445 // N.B.: We have to handle the GPU/DSP cases separately because you can embed
446 // RISC code in the middle of a regular 68K section. Also note that all
447 // of the alignment pseudo-ops will have to be fixed this way.
449 // This *must* behave differently when in a RISC section, as following sloc
450 // (instead of orgaddr) will fuck things up royally. Note that we do it this
451 // way because you can embed RISC code in a 68K section, and have the origin
452 // pointing to a different alignment in the RISC section than the 68K section.
456 unsigned lower3Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x07;
457 unsigned bytesToSkip = (0x08 - lower3Bits) & 0x07;
458 SkipBytes(bytesToSkip);
465 // Adjust location to a DPHRASE value
469 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
470 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
471 SkipBytes(bytesToSkip);
478 // Adjust location to a QPHRASE value
482 unsigned lower5Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x1F;
483 unsigned bytesToSkip = (0x20 - lower5Bits) & 0x1F;
484 SkipBytes(bytesToSkip);
491 // Do auto-even. This must be called ONLY if 'sloc' is odd.
493 // This is made hairy because, if there was a label on the line, we also have
494 // to adjust its value. This won't work with more than one label on the line,
495 // which is OK since multiple labels are only allowed in AS68 kludge mode, and
496 // the C compiler is VERY paranoid and uses ".even" whenever it can
498 // N.B.: This probably needs the same fixes as above...
503 sloc++; // Bump BSS section
505 D_byte(0); // Deposit 0.b in non-BSS
507 if (lab_sym != NULL) // Bump label if we have to
513 // Unimplemened directive error
517 return error("unimplemented directive");
522 // Return absolute (not TDB) and defined expression or return an error
524 int abs_expr(VALUE * a_eval)
528 if (expr(exprbuf, a_eval, &eattr, NULL) < 0)
531 if (!(eattr & DEFINED))
532 return error(undef_error);
535 return error(rel_error);
542 // Hand symbols in a symbol-list to a function (kind of like mapcar...)
544 int symlist(int(* func)())
546 const char * em = "symbol list syntax";
553 if ((*func)(string[tok[1]]) != OK)
572 // .include "filename"
582 if (*tok == STRING) // Leave strings ALONE
584 else if (*tok == SYMBOL) // Try to append ".s" to symbols
586 strcpy(buf, string[*++tok]);
590 else // Punt if no STRING or SYMBOL
591 return error("missing filename");
593 // Make sure the user didn't try anything like:
594 // .include equates.s
596 return error("extra stuff after filename -- enclose it in quotes");
598 // Attempt to open the include file in the current directory, then (if that
599 // failed) try list of include files passed in the enviroment string or by
601 if ((j = open(fn, 0)) < 0)
603 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
607 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
608 strcat(buf1, SLASHSTRING);
612 if ((j = open(buf1, 0)) >= 0)
616 return errors("cannot open: \"%s\"", fn);
626 // .assert expression [, expression...]
633 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
635 if (!(eattr & DEFINED))
636 return error("forward or undefined .assert");
639 return error("assert failure");
651 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
658 return error("cannot .globl local symbol");
660 if ((sy = lookup(p, LABEL, 0)) == NULL)
662 sy = NewSymbol(p, LABEL, 0);
665 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
682 // .prgflags expression
689 return error("PRGFLAGS requires value");
690 else if (abs_expr(&eval) == OK)
697 return error("PRGFLAGS requires value");
713 else if (abs_expr(&eval) != OK)
728 return error("directive forbidden in gpu/dsp mode");
743 return error("directive forbidden in gpu/dsp mode");
758 return error("directive forbidden in gpu/dsp mode");
771 // .ds[.size] expression
776 printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc);
780 // This gets kind of stupid. This directive is disallowed in normal 68000
781 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
782 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
784 if (as68_flag == 0 && (scattr & SBSS) == 0)
785 return error(".ds permitted only in BSS");
787 if (siz != SIZB && (sloc & 1)) // Automatic .even
790 if (abs_expr(&eval) != OK)
793 // In non-TDB section (BSS, ABS and M6502) just advance the location
794 // counter appropriately. In TDB sections, deposit (possibly large) chunks
795 //of zeroed memory....
801 just_bss = 1; // No data deposited (8-bit CPU mode)
805 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
814 // dc.b, dc.w / dc, dc.l
824 int movei = 0; // movei flag for dc.i
826 if ((scattr & SBSS) != 0)
827 return error("illegal initialization of section");
829 // Do an auto_even if it's not BYTE sized (hmm, should we be doing this???)
830 if ((siz != SIZB) && (sloc & 1))
833 // Check to see if we're trying to set LONGS on a non 32-bit aligned
834 // address in a GPU or DSP section, in their local RAM
835 if ((siz == SIZL) && (orgaddr & 0x03)
836 && ((rgpu && (orgaddr >= 0xF03000) && (orgaddr <= 0xF03FFFF))
837 || (rdsp && (orgaddr >= 0xF1B000) && (orgaddr <= 0xF1CFFFF))))
838 warn("depositing LONGs on a non-long address in local RAM");
842 // dc.b 'string' [,] ...
843 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
845 i = strlen(string[tok[1]]);
847 if ((challoc - ch_size) < i)
850 for(p=string[tok[1]]; *p!=EOS; ++p)
865 if (expr(exprbuf, &eval, &eattr, NULL) != OK)
868 tdb = (WORD)(eattr & TDB);
869 defined = (WORD)(eattr & DEFINED);
871 if ((challoc - ch_size) < 4)
879 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
885 return error("non-absolute byte value");
887 if (eval + 0x100 >= 0x200)
889 sprintf(buffer, "%s (value = $%X)", range_error, eval);
890 return error(buffer);
901 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
907 rmark(cursect, sloc, tdb, MWORD, NULL);
909 if (eval + 0x10000 >= 0x20000)
910 return error(range_error);
912 // Deposit 68000 or 6502 (byte-reversed) word
921 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
923 AddFixup(FU_LONG, sloc, exprbuf);
930 rmark(cursect, sloc, tdb, MLONG, NULL);
933 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
951 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
958 if ((scattr & SBSS) != 0)
959 return error("illegal initialization of section");
961 if (abs_expr(&evalc) != OK)
965 return error("missing comma");
967 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
970 if ((siz != SIZB) && (sloc & 1))
973 dep_block(evalc, siz, eval, eattr, exprbuf);
979 // Generalized initialization directive
981 // .init[.siz] [#count,] expression [.size] , ...
983 // The size suffix on the ".init" directive becomes the default size of the
984 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
985 // and an expression, it specifies a repeat count. The value to be deposited
986 // may be followed by a size suffix, which overrides the default size.
988 int d_init(WORD def_siz)
995 if ((scattr & SBSS) != 0)
996 return error(".init not permitted in BSS or ABS");
999 return error("directive forbidden in gpu/dsp mode");
1003 // Get repeat count (defaults to 1)
1008 if (abs_expr(&count) != OK)
1012 return error(comma_error);
1017 // Evaluate expression to deposit
1018 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
1021 switch ((int)*tok++)
1022 { // Determine size of object to deposit
1023 case DOTB: siz = SIZB; break;
1024 case DOTW: siz = SIZB; break;
1025 case DOTL: siz = SIZL; break;
1032 dep_block(count, siz, eval, eattr, exprbuf);
1042 return error(comma_error);
1049 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1051 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1056 tdb = (WORD)(eattr & TDB);
1057 defined = (WORD)(eattr & DEFINED);
1061 if ((challoc - ch_size) < 4)
1069 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1075 return error("non-absolute byte value");
1077 if (eval + 0x100 >= 0x200)
1078 return error(range_error);
1088 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1094 rmark(cursect, sloc, tdb, MWORD, NULL);
1096 if (eval + 0x10000 >= 0x20000)
1097 return error(range_error);
1099 // Deposit 68000 or 6502 (byte-reversed) word
1107 AddFixup(FU_LONG, sloc, exprbuf);
1113 rmark(cursect, sloc, tdb, MLONG, NULL);
1127 // .comm symbol, size
1136 return error("missing symbol");
1141 if (*p == '.') // Cannot .comm a local symbol
1142 return error(locgl_error);
1144 if ((sym = lookup(p, LABEL, 0)) == NULL)
1145 sym = NewSymbol(p, LABEL, 0);
1148 if (sym->sattr & DEFINED)
1149 return error(".comm symbol already defined");
1152 sym->sattr = GLOBAL | COMMON | BSS;
1155 return error(comma_error);
1157 if (abs_expr(&eval) != OK) // Parse size of common region
1160 sym->svalue = eval; // Install common symbol's size
1167 // .list - Turn listing on
1179 // .nlist - Turn listing off
1191 // .68000 - Back to 68000 TEXT segment
1196 // Switching from gpu/dsp sections should reset any ORG'd Address
1200 SwitchSection(TEXT);
1206 // .gpu - Switch to GPU assembler
1210 if ((cursect != TEXT) && (cursect != DATA))
1212 error(".gpu can only be used in the TEXT or DATA segments");
1216 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1219 //printf("Resetting ORG...\n");
1223 //else printf("NOT resetting ORG!\n");
1225 rgpu = 1; // Set GPU assembly
1226 rdsp = 0; // Unset DSP assembly
1227 regbank = BANK_N; // Set no default register bank
1233 // .dsp - Switch to DSP assembler
1237 if ((cursect != TEXT) && (cursect != DATA))
1239 error(".dsp can only be used in the TEXT or DATA segments");
1243 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1250 rdsp = 1; // Set DSP assembly
1251 rgpu = 0; // Unset GPU assembly
1252 regbank = BANK_N; // Set no default register bank
1258 // .cargs [#offset], symbol[.size], ...
1260 // Lists of registers may also be mentioned; they just take up space. Good for
1261 // "documentation" purposes:
1263 // .cargs a6, .arg1, .arg2, .arg3...
1265 // Symbols thus created are ABS and EQUATED.
1269 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1278 return error("directive forbidden in gpu/dsp mode");
1284 if (abs_expr(&eval) != OK)
1287 // Eat the comma, if it's there
1298 // Set env to either local (dot prefixed) or global scope
1299 env = (*p == '.' ? curenv : 0);
1300 symbol = lookup(p, LABEL, env);
1304 symbol = NewSymbol(p, LABEL, env);
1307 else if (symbol->sattr & DEFINED)
1308 return errors("multiply-defined label '%s'", p);
1310 // Put symbol in "order of definition" list
1311 AddToSymbolDeclarationList(symbol);
1313 symbol->sattr |= (ABS | DEFINED | EQUATED);
1314 symbol->svalue = eval;
1317 // What this does is eat any dot suffixes attached to a symbol. If
1318 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1319 // there is no dot suffix, it assumes a size of 2.
1331 else if (*tok >= KW_D0 && *tok <= KW_A7)
1333 if (reglist(&rlist) < 0)
1336 for(i=0; i<16; i++, rlist>>=1)
1359 return error(".cargs syntax");
1363 // Eat commas in between each argument, if they exist
1371 // .cstruct [#offset], symbol[.size], ...
1373 // Lists of registers may also be mentioned; they just take up space. Good for
1374 // "documentation" purposes:
1376 // .cstruct a6, .arg1, .arg2, .arg3...
1378 // Symbols thus created are ABS and EQUATED. Note that this is for
1379 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1384 VALUE eval = 0; // Default, if no offset specified, is zero
1392 return error("directive forbidden in gpu/dsp mode");
1398 if (abs_expr(&eval) != OK)
1401 // Eat the comma, if it's there
1410 symbolName = string[tok[1]];
1412 // Set env to either local (dot prefixed) or global scope
1413 env = (symbolName[0] == '.' ? curenv : 0);
1414 symbol = lookup(symbolName, LABEL, env);
1416 // If the symbol wasn't found, then define it. Otherwise, throw an
1420 symbol = NewSymbol(symbolName, LABEL, env);
1423 else if (symbol->sattr & DEFINED)
1424 return errors("multiply-defined label '%s'", symbolName);
1426 // Put symbol in "order of definition" list
1427 AddToSymbolDeclarationList(symbol);
1431 // Adjust label start address if it's a word or a long, as a byte
1432 // label might have left us on an odd address.
1437 eval += eval & 0x01;
1440 symbol->sattr |= (ABS | DEFINED | EQUATED);
1441 symbol->svalue = eval;
1443 // Check for dot suffixes and adjust space accordingly (longs and
1444 // words on an odd boundary get bumped to the next word aligned
1445 // address). If no suffix, then throw an error.
1458 return error("Symbol missing dot suffix in .cstruct construct");
1463 else if (*tok >= KW_D0 && *tok <= KW_A7)
1465 if (reglist(&rlist) < 0)
1468 for(i=0; i<16; i++, rlist>>=1)
1491 return error(".cstruct syntax");
1495 // Eat commas in between each argument, if they exist
1503 // Undefine a macro - .undefmac macname [, macname...]
1505 int undmac1(char * p)
1507 SYM * symbol = lookup(p, MACRO, 0);
1509 // If the macro symbol exists, cause it to disappear
1510 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1512 symbol->stype = (BYTE)SY_UNDEF;
1527 warn("JPAD directive is deprecated/non-functional");
1534 warn("NOJPAD directive is deprecated/non-functional");
1541 return error("What the hell? Do you think we adhere to the Goof standard?");