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
30 // Directive handler table
46 d_undmac, // 14 undefmac
53 d_incbin, // 21 .incbin //load
54 d_unimpl, // 22 disable
55 d_unimpl, // 23 enable
57 d_regbank0, // 25 .regbank0
58 d_regbank1, // 26 .regbank1
60 d_assert, // 28 assert
62 d_unimpl, // 30* endif
65 d_include, // 33 include
67 d_unimpl, // 35* macro
68 ExitMacro, // 36* exitm
74 d_dphrase, // 42 struct
77 d_subttl, // 45 subttl
81 d_noclear, // 49 .noclear
82 d_equrundef, // 50 .equrundef/.regundef
83 d_ccundef, // 51 .ccundef
85 d_cstruct, // 53 .cstruct
86 d_jpad, // 54 .jpad (deprecated)
87 d_nojpad, // 55 .nojpad (deprecated)
88 d_gpumain, // 56 .gpumain (deprecated)
100 return error(".org permitted only in gpu/dsp section");
104 if (abs_expr(&address) == ERROR)
106 error("cannot determine org'd address");
112 //printf("ORG: address = $%08X...\n", orgaddr);
123 char prntstr[LNSIZ]; // String for PRINT directive
124 char format[LNSIZ]; // Format for PRINT directive
125 int formatting = 0; // Formatting on/off
126 int wordlong = 0; // WORD = 0, LONG = 1
127 int outtype = 0; // 0:hex, 1:decimal, 2:unsigned
129 VALUE eval; // Expression value
130 WORD eattr; // Expression attributes
131 SYM * esym; // External symbol involved in expr.
132 TOKEN r_expr[EXPRSIZE];
139 sprintf(prntstr, "%s", string[tok[1]]);
140 printf("%s", prntstr);
143 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
150 if (tok[1] != SYMBOL)
153 // strcpy(prntstr, (char *)tok[2]);
154 strcpy(prntstr, string[tok[2]]);
158 case 'l': case 'L': wordlong = 1; break;
159 case 'w': case 'W': wordlong = 0; break;
160 case 'x': case 'X': outtype = 0; break;
161 case 'd': case 'D': outtype = 1; break;
162 case 'u': case 'U': outtype = 2; break;
164 error("unknown print format flag");
174 if (expr(r_expr, &eval, &eattr, &esym) != OK)
180 case 0: strcpy(format, "%X"); break;
181 case 1: strcpy(format, "%d" ); break;
182 case 2: strcpy(format, "%u" ); break;
186 sprintf(prntstr, format, eval);
188 sprintf(prntstr, format, eval & 0xFFFF);
190 printf("%s", prntstr);
193 unused = write(list_fd, prntstr, (LONG)strlen(prntstr));
209 error("illegal print token");
215 // Undefine an equated condition code
221 // Check that we are in a RISC section
224 error(".ccundef must be defined in .gpu/.dsp section");
230 error("syntax error; expected symbol");
234 ccname = lookup(string[tok[1]], LABEL, 0);
236 // Make sure symbol is a valid ccdef
237 if (!ccname || !(ccname->sattre & EQUATEDCC))
239 error("invalid equated condition name specified");
243 ccname->sattre |= UNDEF_CC;
250 // Undefine an equated register
252 int d_equrundef(void)
256 // Check that we are in a RISC section
258 return error(".equrundef/.regundef must be defined in .gpu/.dsp section");
262 // Skip preceeding or seperating commas (if any)
266 // Check we are dealing with a symbol
268 return error("syntax error; expected symbol");
270 // Lookup and undef if equated register
271 regname = lookup(string[tok[1]], LABEL, 0);
273 if (regname && (regname->sattre & EQUATEDREG))
275 // Reset the attributes of this symbol...
277 regname->sattre &= ~(EQUATEDREG | BANK_0 | BANK_1);
278 regname->sattre |= UNDEF_EQUR;
281 // Skip over symbol token and address
290 // Do not allow use of the CLR.L opcode
299 // Include binary file
305 long pos, size, bytesRead;
308 // Check to see if we're in BSS, and, if so, throw an error
311 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
317 error("syntax error; string missing");
321 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
323 errors("cannot open include binary file (%s)", string[tok[1]]);
327 size = lseek(fd, 0L, SEEK_END);
328 pos = lseek(fd, 0L, SEEK_SET);
331 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
333 char * fileBuffer = (char *)malloc(size);
334 bytesRead = read(fd, fileBuffer, size);
336 if (bytesRead != size)
338 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
343 memcpy(chptr, fileBuffer, size);
358 // Set RISC register banks
362 // Set active register bank zero
370 // Set active register bank one
377 // Helper function, to cut down on mistakes & typing
379 static inline void SkipBytes(unsigned bytesToSkip)
384 if ((scattr & SBSS) == 0)
386 chcheck(bytesToSkip);
387 D_ZEROFILL(bytesToSkip);
394 orgaddr += bytesToSkip;
400 // Adjust location to an EVEN value
404 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
408 if ((scattr & SBSS) == 0)
427 // Adjust location to a LONG value
431 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
432 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
433 SkipBytes(bytesToSkip);
440 // Adjust location to a PHRASE value
442 // N.B.: We have to handle the GPU/DSP cases separately because you can embed
443 // RISC code in the middle of a regular 68K section. Also note that all
444 // of the alignment pseudo-ops will have to be fixed this way.
446 // This *must* behave differently when in a RISC section, as following sloc
447 // (instead of orgaddr) will fuck things up royally. Note that we do it this
448 // way because you can embed RISC code in a 68K section, and have the origin
449 // pointing to a different alignment in the RISC section than the 68K section.
453 unsigned lower3Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x07;
454 unsigned bytesToSkip = (0x08 - lower3Bits) & 0x07;
455 SkipBytes(bytesToSkip);
462 // Adjust location to a DPHRASE value
466 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
467 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
468 SkipBytes(bytesToSkip);
475 // Adjust location to a QPHRASE value
479 unsigned lower5Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x1F;
480 unsigned bytesToSkip = (0x20 - lower5Bits) & 0x1F;
481 SkipBytes(bytesToSkip);
488 // Do auto-even. This must be called ONLY if 'sloc' is odd.
490 // This is made hairy because, if there was a label on the line, we also have
491 // to adjust its value. This won't work with more than one label on the line,
492 // which is OK since multiple labels are only allowed in AS68 kludge mode, and
493 // the C compiler is VERY paranoid and uses ".even" whenever it can
495 // N.B.: This probably needs the same fixes as above...
500 sloc++; // Bump BSS section
502 D_byte(0); // Deposit 0.b in non-BSS
504 if (lab_sym != NULL) // Bump label if we have to
510 // Unimplemened directive error
514 return error("unimplemented directive");
519 // Return absolute (not TDB) and defined expression or return an error
521 int abs_expr(VALUE * a_eval)
525 if (expr(exprbuf, a_eval, &eattr, NULL) < 0)
528 if (!(eattr & DEFINED))
529 return error(undef_error);
532 return error(rel_error);
539 // Hand symbols in a symbol-list to a function (kind of like mapcar...)
541 int symlist(int(* func)())
543 const char * em = "symbol list syntax";
550 if ((*func)(string[tok[1]]) != OK)
569 // .include "filename"
579 if (*tok == STRING) // Leave strings ALONE
581 else if (*tok == SYMBOL) // Try to append ".s" to symbols
583 strcpy(buf, string[*++tok]);
587 else // Punt if no STRING or SYMBOL
588 return error("missing filename");
590 // Make sure the user didn't try anything like:
591 // .include equates.s
593 return error("extra stuff after filename -- enclose it in quotes");
595 // Attempt to open the include file in the current directory, then (if that
596 // failed) try list of include files passed in the enviroment string or by
598 if ((j = open(fn, 0)) < 0)
600 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
604 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
605 strcat(buf1, SLASHSTRING);
609 if ((j = open(buf1, 0)) >= 0)
613 return errors("cannot open: \"%s\"", fn);
623 // .assert expression [, expression...]
630 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
632 if (!(eattr & DEFINED))
633 return error("forward or undefined .assert");
636 return error("assert failure");
648 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
655 return error("cannot .globl local symbol");
657 if ((sy = lookup(p, LABEL, 0)) == NULL)
659 sy = NewSymbol(p, LABEL, 0);
662 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
689 else if (abs_expr(&eval) != OK)
704 return error("directive forbidden in gpu/dsp mode");
719 return error("directive forbidden in gpu/dsp mode");
734 return error("directive forbidden in gpu/dsp mode");
747 // .ds[.size] expression
752 printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc);
756 // This gets kind of stupid. This directive is disallowed in normal 68000
757 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
758 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
760 if (as68_flag == 0 && (scattr & SBSS) == 0)
761 return error(".ds permitted only in BSS");
763 if (siz != SIZB && (sloc & 1)) // Automatic .even
766 if (abs_expr(&eval) != OK)
769 // In non-TDB section (BSS, ABS and M6502) just advance the location
770 // counter appropriately. In TDB sections, deposit (possibly large) chunks
771 //of zeroed memory....
777 just_bss = 1; // No data deposited (8-bit CPU mode)
781 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
790 // dc.b, dc.w / dc, dc.l
800 int movei = 0; // movei flag for dc.i
802 if ((scattr & SBSS) != 0)
803 return error("illegal initialization of section");
805 if ((siz != SIZB) && (sloc & 1))
810 // dc.b 'string' [,] ...
811 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
813 // i = strlen((const char*)tok[1]);
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)
857 return error(range_error);
867 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
873 rmark(cursect, sloc, tdb, MWORD, NULL);
875 if (eval + 0x10000 >= 0x20000)
876 return error(range_error);
878 // Deposit 68000 or 6502 (byte-reversed) word
887 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
889 AddFixup(FU_LONG, sloc, exprbuf);
896 rmark(cursect, sloc, tdb, MLONG, NULL);
899 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
917 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
924 if ((scattr & SBSS) != 0)
925 return error("illegal initialization of section");
927 if (abs_expr(&evalc) != OK)
931 return error("missing comma");
933 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
936 if ((siz != SIZB) && (sloc & 1))
939 dep_block(evalc, siz, eval, eattr, exprbuf);
945 // Generalized initialization directive
947 // .init[.siz] [#count,] expression [.size] , ...
949 // The size suffix on the ".init" directive becomes the default size of the
950 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
951 // and an expression, it specifies a repeat count. The value to be deposited
952 // may be followed by a size suffix, which overrides the default size.
954 int d_init(WORD def_siz)
961 if ((scattr & SBSS) != 0)
962 return error(".init not permitted in BSS or ABS");
965 return error("directive forbidden in gpu/dsp mode");
969 // Get repeat count (defaults to 1)
974 if (abs_expr(&count) != OK)
978 return error(comma_error);
983 // Evaluate expression to deposit
984 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
988 { // Determine size of object to deposit
989 case DOTB: siz = SIZB; break;
990 case DOTW: siz = SIZB; break;
991 case DOTL: siz = SIZL; break;
998 dep_block(count, siz, eval, eattr, exprbuf);
1008 return error(comma_error);
1015 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1017 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1022 tdb = (WORD)(eattr & TDB);
1023 defined = (WORD)(eattr & DEFINED);
1027 if ((challoc - ch_size) < 4)
1035 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1041 return error("non-absolute byte value");
1043 if (eval + 0x100 >= 0x200)
1044 return error(range_error);
1054 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1060 rmark(cursect, sloc, tdb, MWORD, NULL);
1062 if (eval + 0x10000 >= 0x20000)
1063 return error(range_error);
1065 // Deposit 68000 or 6502 (byte-reversed) word
1073 AddFixup(FU_LONG, sloc, exprbuf);
1079 rmark(cursect, sloc, tdb, MLONG, NULL);
1093 // .comm symbol, size
1102 return error("missing symbol");
1107 if (*p == '.') // Cannot .comm a local symbol
1108 return error(locgl_error);
1110 if ((sym = lookup(p, LABEL, 0)) == NULL)
1111 sym = NewSymbol(p, LABEL, 0);
1114 if (sym->sattr & DEFINED)
1115 return error(".comm symbol already defined");
1118 sym->sattr = GLOBAL | COMMON | BSS;
1121 return error(comma_error);
1123 if (abs_expr(&eval) != OK) // Parse size of common region
1126 sym->svalue = eval; // Install common symbol's size
1133 // .list - Turn listing on
1145 // .nlist - Turn listing off
1157 // .68000 - Back to 68000 TEXT segment
1162 // Switching from gpu/dsp sections should reset any ORG'd Address
1166 SwitchSection(TEXT);
1172 // .gpu - Switch to GPU assembler
1176 if ((cursect != TEXT) && (cursect != DATA))
1178 error(".gpu can only be used in the TEXT or DATA segments");
1182 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1185 //printf("Resetting ORG...\n");
1189 //else printf("NOT resetting ORG!\n");
1191 rgpu = 1; // Set GPU assembly
1192 rdsp = 0; // Unset DSP assembly
1193 regbank = BANK_N; // Set no default register bank
1199 // .dsp - Switch to DSP assembler
1203 if ((cursect != TEXT) && (cursect != DATA))
1205 error(".dsp can only be used in the TEXT or DATA segments");
1209 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1216 rdsp = 1; // Set DSP assembly
1217 rgpu = 0; // Unset GPU assembly
1218 regbank = BANK_N; // Set no default register bank
1224 // .cargs [#offset], symbol[.size], ...
1226 // Lists of registers may also be mentioned; they just take up space. Good for
1227 // "documentation" purposes:
1229 // .cargs a6, .arg1, .arg2, .arg3...
1231 // Symbols thus created are ABS and EQUATED.
1235 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1244 return error("directive forbidden in gpu/dsp mode");
1250 if (abs_expr(&eval) != OK)
1253 // Eat the comma, if it's there
1264 // Set env to either local (dot prefixed) or global scope
1265 env = (*p == '.' ? curenv : 0);
1266 symbol = lookup(p, LABEL, env);
1270 symbol = NewSymbol(p, LABEL, env);
1273 else if (symbol->sattr & DEFINED)
1274 return errors("multiply-defined label '%s'", p);
1276 // Put symbol in "order of definition" list
1277 AddToSymbolDeclarationList(symbol);
1279 symbol->sattr |= (ABS | DEFINED | EQUATED);
1280 symbol->svalue = eval;
1283 // What this does is eat any dot suffixes attached to a symbol. If
1284 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1285 // there is no dot suffix, it assumes a size of 2.
1297 else if (*tok >= KW_D0 && *tok <= KW_A7)
1299 if (reglist(&rlist) < 0)
1302 for(i=0; i<16; i++, rlist>>=1)
1325 return error(".cargs syntax");
1329 // Eat commas in between each argument, if they exist
1337 // .cstruct [#offset], symbol[.size], ...
1339 // Lists of registers may also be mentioned; they just take up space. Good for
1340 // "documentation" purposes:
1342 // .cstruct a6, .arg1, .arg2, .arg3...
1344 // Symbols thus created are ABS and EQUATED. Note that this is for
1345 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1350 VALUE eval = 0; // Default, if no offset specified, is zero
1358 return error("directive forbidden in gpu/dsp mode");
1364 if (abs_expr(&eval) != OK)
1367 // Eat the comma, if it's there
1376 symbolName = string[tok[1]];
1378 // Set env to either local (dot prefixed) or global scope
1379 env = (symbolName[0] == '.' ? curenv : 0);
1380 symbol = lookup(symbolName, LABEL, env);
1382 // If the symbol wasn't found, then define it. Otherwise, throw an
1386 symbol = NewSymbol(symbolName, LABEL, env);
1389 else if (symbol->sattr & DEFINED)
1390 return errors("multiply-defined label '%s'", symbolName);
1392 // Put symbol in "order of definition" list
1393 AddToSymbolDeclarationList(symbol);
1397 // Adjust label start address if it's a word or a long, as a byte
1398 // label might have left us on an odd address.
1403 eval += eval & 0x01;
1406 symbol->sattr |= (ABS | DEFINED | EQUATED);
1407 symbol->svalue = eval;
1409 // Check for dot suffixes and adjust space accordingly (longs and
1410 // words on an odd boundary get bumped to the next word aligned
1411 // address). If no suffix, then throw an error.
1424 return error("Symbol missing dot suffix in .cstruct construct");
1429 else if (*tok >= KW_D0 && *tok <= KW_A7)
1431 if (reglist(&rlist) < 0)
1434 for(i=0; i<16; i++, rlist>>=1)
1457 return error(".cstruct syntax");
1461 // Eat commas in between each argument, if they exist
1469 // Undefine a macro - .undefmac macname [, macname...]
1471 int undmac1(char * p)
1473 SYM * symbol = lookup(p, MACRO, 0);
1475 // If the macro symbol exists, cause it to disappear
1476 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1478 symbol->stype = (BYTE)SY_UNDEF;
1493 warn("JPAD directive is deprecated/non-functional");
1500 warn("NOJPAD directive is deprecated/non-functional");
1507 return error("What the hell? Do you think we adhere to the Goof standard?");