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", (char *)tok[1]);
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));
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);
233 error("syntax error; expected symbol");
237 // ccname = lookup((char *)tok[1], LABEL, 0);
238 ccname = lookup(string[tok[1]], LABEL, 0);
240 // Make sure symbol is a valid ccdef
241 if (!ccname || !(ccname->sattre & EQUATEDCC))
243 error("invalid equated condition name specified");
247 ccname->sattre |= UNDEF_CC;
254 // Undefine an Equated Register
256 int d_equrundef(void)
260 // Check that we are in a RISC section
262 return error(".equrundef/.regundef must be defined in .gpu/.dsp section");
266 // Skip preceeding or seperating commas (if any)
270 // Check we are dealing with a symbol
272 return error("syntax error; expected symbol");
274 // Lookup and undef if equated register
275 regname = lookup(string[tok[1]], LABEL, 0);
277 if (regname && (regname->sattre & EQUATEDREG))
278 regname->sattre |= UNDEF_EQUR;
280 // Skip over symbol token and address
289 // Do Not Allow the Use of the CLR.L Opcode
298 // Include Binary File
304 long pos, size, bytesRead;
307 // Check to see if we're in BSS, and, if so, throw an error
310 errors("cannot include binary file \"%s\" in BSS section", string[tok[1]]);
316 error("syntax error; string missing");
320 if ((fd = open(string[tok[1]], _OPEN_INC)) < 0)
322 errors("cannot open include binary file (%s)", string[tok[1]]);
326 size = lseek(fd, 0L, SEEK_END);
327 pos = lseek(fd, 0L, SEEK_SET);
330 DEBUG { printf("INCBIN: File '%s' is %li bytes.\n", string[tok[1]], size); }
332 char * fileBuffer = (char *)malloc(size);
333 bytesRead = read(fd, fileBuffer, size);
335 if (bytesRead != size)
337 sprintf(msg, "was only able to read %li bytes from binary file (%s, %li bytes)", bytesRead, string[tok[1]], size);
342 memcpy(chptr, fileBuffer, size);
357 // Set RISC Register Banks
361 // Set active register bank zero
369 // Set active register bank one
376 // Helper function, to cut down on mistakes & typing
378 static inline void SkipBytes(unsigned bytesToSkip)
383 if ((scattr & SBSS) == 0)
385 chcheck(bytesToSkip);
386 D_ZEROFILL(bytesToSkip);
393 orgaddr += bytesToSkip;
399 // Adjust Location to an EVEN Value
403 unsigned skip = (rgpu || rdsp ? orgaddr : sloc) & 0x01;
408 if ((scattr & SBSS) == 0)
427 // Adjust Location to an LONG Value
431 unsigned lower2Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x03;
432 unsigned bytesToSkip = (0x04 - lower2Bits) & 0x03;
433 SkipBytes(bytesToSkip);
440 // Adjust Location to an 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 an DPHRASE Value
466 unsigned lower4Bits = (rgpu || rdsp ? orgaddr : sloc) & 0x0F;
467 unsigned bytesToSkip = (0x10 - lower4Bits) & 0x0F;
468 SkipBytes(bytesToSkip);
475 // Adjust Location to an 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
585 else if (*tok == SYMBOL) // Try to append ".s" to symbols
588 strcpy(buf, (char *)*++tok);
590 strcpy(buf, string[*++tok]);
595 else // Punt if no STRING or SYMBOL
596 return error("missing filename");
598 // Make sure the user didn't try anything like:
599 // .include equates.s
601 return error("extra stuff after filename -- enclose it in quotes");
603 // Attempt to open the include file in the current directory, then (if that
604 // failed) try list of include files passed in the enviroment string or by
606 if ((j = open(fn, 0)) < 0)
608 for(i=0; nthpath("RMACPATH", i, buf1)!=0; i++)
612 if (j > 0 && buf1[j - 1] != SLASHCHAR) // Append path char if necessary
613 strcat(buf1, SLASHSTRING);
617 if ((j = open(buf1, 0)) >= 0)
621 return errors("cannot open: \"%s\"", fn);
631 // .assert expression [, expression...]
638 for(; expr(exprbuf, &eval, &eattr, NULL)==OK; ++tok)
640 if (!(eattr & DEFINED))
641 return error("forward or undefined .assert");
644 return error("assert failure");
656 // .globl symbol [, symbol] <<<cannot make local symbols global>>>
663 return error("cannot .globl local symbol");
665 if ((sy = lookup(p, LABEL, 0)) == NULL)
667 sy = NewSymbol(p, LABEL, 0);
670 //printf("glob1: Making global symbol: attr=%04X, eattr=%08X, %s\n", sy->sattr, sy->sattre, sy->sname);
697 else if (abs_expr(&eval) != OK)
713 return error("directive forbidden in gpu/dsp mode");
728 return error("directive forbidden in gpu/dsp mode");
743 return error("directive forbidden in gpu/dsp mode");
756 // .ds[.size] expression
761 printf("Directive: .ds.[size] = %u, sloc = $%X\n", siz, sloc);
765 // This gets kind of stupid. This directive is disallowed in normal 68000
766 // mode ("for your own good!"), but is permitted for 6502 and Alcyon-
767 // compatibility modes. For obvious reasons, no auto-even is done in 8-bit
769 if (as68_flag == 0 && (scattr & SBSS) == 0)
770 return error(".ds permitted only in BSS");
772 if (siz != SIZB && (sloc & 1)) // Automatic .even
775 if (abs_expr(&eval) != OK)
778 // In non-TDB section (BSS, ABS and M6502) just advance the location
779 // counter appropriately. In TDB sections, deposit (possibly large) chunks
780 //of zeroed memory....
786 just_bss = 1; // No data deposited (8-bit CPU mode)
790 dep_block(eval, siz, (VALUE)0, (WORD)(DEFINED | ABS), NULL);
799 // dc.b, dc.w / dc, dc.l
809 int movei = 0; // movei flag for dc.i
811 if ((scattr & SBSS) != 0)
812 return error("illegal initialization of section");
814 if ((siz != SIZB) && (sloc & 1))
819 // dc.b 'string' [,] ...
820 if (siz == SIZB && *tok == STRING && (tok[2] == ',' || tok[2] == EOL))
822 // i = strlen((const char*)tok[1]);
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)
866 return error(range_error);
876 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
882 rmark(cursect, sloc, tdb, MWORD, NULL);
884 if (eval + 0x10000 >= 0x20000)
885 return error(range_error);
887 // Deposit 68000 or 6502 (byte-reversed) word
896 AddFixup(FU_LONG | FU_MOVEI, sloc, exprbuf);
898 AddFixup(FU_LONG, sloc, exprbuf);
905 rmark(cursect, sloc, tdb, MLONG, NULL);
908 eval = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
926 // dcb[.siz] expr1,expr2 - Make 'expr1' copies of 'expr2'
933 if ((scattr & SBSS) != 0)
934 return error("illegal initialization of section");
936 if (abs_expr(&evalc) != OK)
940 return error("missing comma");
942 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
945 if ((siz != SIZB) && (sloc & 1))
948 dep_block(evalc, siz, eval, eattr, exprbuf);
954 // Generalized initialization directive
956 // .init[.siz] [#count,] expression [.size] , ...
958 // The size suffix on the ".init" directive becomes the default size of the
959 // objects to deposit. If an item is preceeded with a sharp (immediate) sign
960 // and an expression, it specifies a repeat count. The value to be deposited
961 // may be followed by a size suffix, which overrides the default size.
963 int d_init(WORD def_siz)
970 if ((scattr & SBSS) != 0)
971 return error(".init not permitted in BSS or ABS");
974 return error("directive forbidden in gpu/dsp mode");
978 // Get repeat count (defaults to 1)
983 if (abs_expr(&count) != OK)
987 return error(comma_error);
992 // Evaluate expression to deposit
993 if (expr(exprbuf, &eval, &eattr, NULL) < 0)
997 { // Determine size of object to deposit
998 case DOTB: siz = SIZB; break;
999 case DOTW: siz = SIZB; break;
1000 case DOTL: siz = SIZL; break;
1007 dep_block(count, siz, eval, eattr, exprbuf);
1017 return error(comma_error);
1024 // Deposit 'count' values of size 'siz' in the current (non-BSS) segment
1026 int dep_block(VALUE count, WORD siz, VALUE eval, WORD eattr, TOKEN * exprbuf)
1031 tdb = (WORD)(eattr & TDB);
1032 defined = (WORD)(eattr & DEFINED);
1036 if ((challoc - ch_size) < 4)
1044 AddFixup(FU_BYTE | FU_SEXT, sloc, exprbuf);
1050 return error("non-absolute byte value");
1052 if (eval + 0x100 >= 0x200)
1053 return error(range_error);
1063 AddFixup(FU_WORD | FU_SEXT, sloc, exprbuf);
1069 rmark(cursect, sloc, tdb, MWORD, NULL);
1071 if (eval + 0x10000 >= 0x20000)
1072 return error(range_error);
1074 // Deposit 68000 or 6502 (byte-reversed) word
1082 AddFixup(FU_LONG, sloc, exprbuf);
1088 rmark(cursect, sloc, tdb, MLONG, NULL);
1102 // .comm symbol, size
1111 return error("missing symbol");
1113 // p = (char *)tok[1];
1117 if (*p == '.') // Cannot .comm a local symbol
1118 return error(locgl_error);
1120 if ((sym = lookup(p, LABEL, 0)) == NULL)
1121 sym = NewSymbol(p, LABEL, 0);
1124 if (sym->sattr & DEFINED)
1125 return error(".comm symbol already defined");
1128 sym->sattr = GLOBAL | COMMON | BSS;
1131 return error(comma_error);
1133 if (abs_expr(&eval) != OK) // Parse size of common region
1136 sym->svalue = eval; // Install common symbol's size
1143 // .list - Turn listing on
1155 // .nlist - Turn listing off
1167 // .68000 - Back to 68000 TEXT segment
1172 // Switching from gpu/dsp sections should reset any ORG'd Address
1176 SwitchSection(TEXT);
1182 // .gpu - Switch to GPU Assembler
1186 if ((cursect != TEXT) && (cursect != DATA))
1188 error(".gpu can only be used in the TEXT or DATA segments");
1192 // If previous section was dsp or 68000 then we need to reset ORG'd Addresses
1195 //printf("Resetting ORG...\n");
1199 //else printf("NOT resetting ORG!\n");
1201 rgpu = 1; // Set GPU assembly
1202 rdsp = 0; // Unset DSP assembly
1203 regbank = BANK_N; // Set no default register bank
1209 // .dsp - Switch to DSP Assembler
1213 if ((cursect != TEXT) && (cursect != DATA))
1215 error(".dsp can only be used in the TEXT or DATA segments");
1219 // If previous section was gpu or 68000 then we need to reset ORG'd Addresses
1226 rdsp = 1; // Set DSP assembly
1227 rgpu = 0; // Unset GPU assembly
1228 regbank = BANK_N; // Set no default register bank
1234 // .cargs [#offset], symbol[.size], ...
1236 // Lists of registers may also be mentioned; they just take up space. Good for
1237 // "documentation" purposes:
1239 // .cargs a6, .arg1, .arg2, .arg3...
1241 // Symbols thus created are ABS and EQUATED.
1245 VALUE eval = 4; // Default to 4 if no offset specified (to account for
1254 return error("directive forbidden in gpu/dsp mode");
1260 if (abs_expr(&eval) != OK)
1263 // Eat the comma, if it's there
1272 // p = (char *)tok[1];
1277 env = curenv; // Label is local
1279 env = 0; // Label is global
1281 // Set env to either local (dot prefixed) or global scope
1282 env = (*p == '.' ? curenv : 0);
1284 symbol = lookup(p, LABEL, env);
1288 symbol = NewSymbol(p, LABEL, env);
1291 else if (symbol->sattr & DEFINED)
1292 return errors("multiply-defined label '%s'", p);
1294 // Put symbol in "order of definition" list
1295 if (!(symbol->sattr & SDECLLIST))
1296 AddToSymbolOrderList(symbol);
1298 symbol->sattr |= (ABS | DEFINED | EQUATED);
1299 symbol->svalue = eval;
1302 // What this does is eat any dot suffixes attached to a symbol. If
1303 // it's a .L, it adds 4 to eval; if it's .W or .B, it adds 2. If
1304 // there is no dot suffix, it assumes a size of 2.
1316 else if (*tok >= KW_D0 && *tok <= KW_A7)
1318 if (reglist(&rlist) < 0)
1321 // for(i=0; i++<16; rlist>>=1)
1322 for(i=0; i<16; i++, rlist>>=1)
1345 return error(".cargs syntax");
1349 // Eat commas in between each argument, if they exist
1357 // .cstruct [#offset], symbol[.size], ...
1359 // Lists of registers may also be mentioned; they just take up space. Good for
1360 // "documentation" purposes:
1362 // .cstruct a6, .arg1, .arg2, .arg3...
1364 // Symbols thus created are ABS and EQUATED. Note that this is for
1365 // compatibility with VBCC and the Remover's library. Thanks to GroovyBee for
1370 VALUE eval = 0; // Default, if no offset specified, is zero
1378 return error("directive forbidden in gpu/dsp mode");
1384 if (abs_expr(&eval) != OK)
1387 // Eat the comma, if it's there
1396 symbolName = string[tok[1]];
1398 // Set env to either local (dot prefixed) or global scope
1399 env = (symbolName[0] == '.' ? curenv : 0);
1400 symbol = lookup(symbolName, LABEL, env);
1402 // If the symbol wasn't found, then define it. Otherwise, throw an
1406 symbol = NewSymbol(symbolName, LABEL, env);
1409 else if (symbol->sattr & DEFINED)
1410 return errors("multiply-defined label '%s'", symbolName);
1412 // Put symbol in "order of definition" list
1413 if (!(symbol->sattr & SDECLLIST))
1414 AddToSymbolOrderList(symbol);
1418 // Adjust label start address if it's a word or a long, as a byte
1419 // label might have left us on an odd address.
1424 eval += eval & 0x01;
1427 symbol->sattr |= (ABS | DEFINED | EQUATED);
1428 symbol->svalue = eval;
1430 // Check for dot suffixes and adjust space accordingly (longs and
1431 // words on an odd boundary get bumped to the next word aligned
1432 // address). If no suffix, then throw an error.
1445 return error("Symbol missing dot suffix in .cstruct construct");
1450 else if (*tok >= KW_D0 && *tok <= KW_A7)
1452 if (reglist(&rlist) < 0)
1455 for(i=0; i<16; i++, rlist>>=1)
1478 return error(".cstruct syntax");
1482 // Eat commas in between each argument, if they exist
1490 // Undefine a macro - .undefmac macname [, macname...]
1492 int undmac1(char * p)
1494 SYM * symbol = lookup(p, MACRO, 0);
1496 // If the macro symbol exists, cause it to disappear
1497 // if ((sy = lookup(p, MACRO, 0)) != NULL)
1499 symbol->stype = (BYTE)SY_UNDEF;
1514 warn("JPAD directive is deprecated/non-functional");
1521 warn("NOJPAD directive is deprecated/non-functional");
1528 return error("What the hell? Do you think we adhere to the Goof standard?");