1 /*-------------------------------------------------------------------------
2 SDCCsymt.c - Code file for Symbols table related structures and MACRO's.
3 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding!
22 -------------------------------------------------------------------------*/
27 value *aggregateToPointer (value *val);
28 void printTypeChainRaw (sym_link * start, FILE * of);
30 void printFromToType(sym_link *from, sym_link *to) {
31 fprintf (stderr, "from type '");
32 printTypeChain (from, stderr);
33 fprintf (stderr, "'\nto type '");
34 printTypeChain (to, stderr);
35 fprintf (stderr, "'\n");
39 char *nounName(sym_link *sl) {
40 switch (SPEC_NOUN(sl))
43 if (SPEC_LONG(sl)) return "long";
44 if (sl->select.s._short) return "short";
47 case V_FLOAT: return "float";
48 case V_CHAR: return "char";
49 case V_VOID: return "void";
50 case V_STRUCT: return "struct";
51 case V_LABEL: return "label";
52 case V_BITFIELD: return "bitfield";
53 case V_BIT: return "bit";
54 case V_SBIT: return "sbit";
55 case V_DOUBLE: return "double";
60 bucket *SymbolTab[256]; /* the symbol table */
61 bucket *StructTab[256]; /* the structure table */
62 bucket *TypedefTab[256]; /* the typedef table */
63 bucket *LabelTab[256]; /* the Label table */
64 bucket *enumTab[256]; /* enumerated table */
66 /*------------------------------------------------------------------*/
67 /* initSymt () - initialises symbol table related stuff */
68 /*------------------------------------------------------------------*/
74 for (i = 0; i < 256; i++)
75 SymbolTab[i] = StructTab[i] = (void *) NULL;
79 /*-----------------------------------------------------------------*/
80 /* newBucket - allocates & returns a new bucket */
81 /*-----------------------------------------------------------------*/
87 bp = Safe_alloc ( sizeof (bucket));
92 /*-----------------------------------------------------------------*/
93 /* hashKey - computes the hashkey given a symbol name */
94 /*-----------------------------------------------------------------*/
96 hashKey (const char *s)
98 unsigned long key = 0;
105 /*-----------------------------------------------------------------*/
106 /* addSym - adds a symbol to the hash Table */
107 /*-----------------------------------------------------------------*/
109 addSym (bucket ** stab,
116 int i; /* index into the hash Table */
117 bucket *bp; /* temp bucket * */
120 symbol *csym = (symbol *)sym;
122 if (getenv("DEBUG_SANITY")) {
123 fprintf (stderr, "addSym: %s ", sname);
125 /* make sure the type is complete and sane */
126 checkTypeSanity(csym->etype, csym->name);
129 /* prevent overflow of the (r)name buffers */
130 if (strlen(sname)>SDCC_SYMNAME_MAX) {
131 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
132 sname[SDCC_SYMNAME_MAX]='\0';
135 /* the symbols are always added at the head of the list */
137 /* get a free entry */
138 bp = Safe_alloc ( sizeof (bucket));
140 bp->sym = sym; /* update the symbol pointer */
141 bp->level = level; /* update the nest level */
143 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
145 /* if this is the first entry */
148 bp->prev = bp->next = (void *) NULL; /* point to nothing */
151 /* not first entry then add @ head of list */
161 /*-----------------------------------------------------------------*/
162 /* deleteSym - deletes a symbol from the hash Table entry */
163 /*-----------------------------------------------------------------*/
165 deleteSym (bucket ** stab, void *sym, char *sname)
173 /* find the symbol */
176 if (bp->sym == sym) /* found it then break out */
177 break; /* of the loop */
181 if (!bp) /* did not find it */
183 /* if this is the first one in the chain */
187 if (stab[i]) /* if chain ! empty */
188 stab[i]->prev = (void *) NULL;
190 /* middle || end of chain */
193 if (bp->next) /* if not end of chain */
194 bp->next->prev = bp->prev;
196 bp->prev->next = bp->next;
201 /*-----------------------------------------------------------------*/
202 /* findSym - finds a symbol in a table */
203 /*-----------------------------------------------------------------*/
205 findSym (bucket ** stab, void *sym, const char *sname)
209 bp = stab[hashKey (sname)];
212 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
217 return (bp ? bp->sym : (void *) NULL);
220 /*-----------------------------------------------------------------*/
221 /* findSymWithLevel - finds a symbol with a name & level */
222 /*-----------------------------------------------------------------*/
224 findSymWithLevel (bucket ** stab, symbol * sym)
228 bp = stab[hashKey (sym->name)];
231 ** do the search from the head of the list since the
232 ** elements are added at the head it is ensured that
233 ** we will find the deeper definitions before we find
234 ** the global ones. we need to check for symbols with
235 ** level <= to the level given, if levels match then block
236 ** numbers need to match as well
240 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
242 /* if this is parameter then nothing else need to be checked */
243 if (((symbol *) (bp->sym))->_isparm)
245 /* if levels match then block numbers should also match */
246 if (bp->level && bp->level == sym->level && bp->block == sym->block)
248 /* if levels don't match then we are okay */
249 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
251 /* if this is a global variable then we are ok too */
259 return (void *) NULL;
262 /*-----------------------------------------------------------------*/
263 /* findSymWithBlock - finds a symbol with name in with a block */
264 /*-----------------------------------------------------------------*/
266 findSymWithBlock (bucket ** stab, symbol * sym, int block)
270 bp = stab[hashKey (sym->name)];
273 if (strcmp (bp->name, sym->name) == 0 &&
279 return (bp ? bp->sym : (void *) NULL);
282 /*------------------------------------------------------------------*/
283 /* newSymbol () - returns a new pointer to a symbol */
284 /*------------------------------------------------------------------*/
286 newSymbol (char *name, int scope)
290 sym = Safe_alloc ( sizeof (symbol));
292 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
293 sym->level = scope; /* set the level */
294 sym->block = currBlockno;
295 sym->lineDef = mylineno; /* set the line number */
299 /*------------------------------------------------------------------*/
300 /* newLink - creates a new link (declarator,specifier) */
301 /*------------------------------------------------------------------*/
303 newLink (SYM_LINK_CLASS select)
307 p = Safe_alloc ( sizeof (sym_link));
313 /*------------------------------------------------------------------*/
314 /* newStruct - creats a new structdef from the free list */
315 /*------------------------------------------------------------------*/
317 newStruct (char *tag)
321 s = Safe_alloc ( sizeof (structdef));
323 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
327 /*------------------------------------------------------------------*/
328 /* sclsFromPtr - Return the storage class a pointer points into. */
329 /* S_FIXED is returned for generic pointers or other */
330 /* unexpected cases */
331 /*------------------------------------------------------------------*/
333 sclsFromPtr(sym_link *ptr)
335 switch (DCL_TYPE (ptr))
358 /*------------------------------------------------------------------*/
359 /* pointerTypes - do the computation for the pointer types */
360 /*------------------------------------------------------------------*/
362 pointerTypes (sym_link * ptr, sym_link * type)
367 /* find the first pointer type */
368 while (ptr && !IS_PTR (ptr))
371 /* could not find it */
372 if (!ptr || IS_SPEC (ptr))
375 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
376 pointerTypes (ptr->next, type);
380 /* change the pointer type depending on the
381 storage class of the type */
384 switch (SPEC_SCLS (type))
387 DCL_TYPE (ptr) = FPOINTER;
390 DCL_TYPE (ptr) = IPOINTER;
393 DCL_TYPE (ptr) = PPOINTER;
396 DCL_TYPE (ptr) = POINTER;
399 DCL_TYPE (ptr) = CPOINTER;
402 DCL_TYPE (ptr) = EEPPOINTER;
405 DCL_TYPE (ptr) = port->unqualified_pointer;
408 /* the storage class of type ends here */
409 SPEC_SCLS (type) = 0;
412 /* now change all the remaining unknown pointers
413 to generic pointers */
416 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
417 DCL_TYPE (ptr) = port->unqualified_pointer;
421 /* same for the type although it is highly unlikely that
422 type will have a pointer */
425 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
426 DCL_TYPE (type) = port->unqualified_pointer;
431 /*------------------------------------------------------------------*/
432 /* addDecl - adds a declarator @ the end of a chain */
433 /*------------------------------------------------------------------*/
435 addDecl (symbol * sym, int type, sym_link * p)
441 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
442 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
444 /* if we are passed a link then set head & tail */
453 head = tail = newLink (DECLARATOR);
454 DCL_TYPE (head) = type;
457 /* if this is the first entry */
465 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
467 sym->etype = mergeSpec (sym->etype, head, sym->name);
471 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
474 while (t->next != sym->etype)
477 tail->next = sym->etype;
481 sym->etype->next = head;
487 /* if the type is an unknown pointer and has
488 a tspec then take the storage class const & volatile
489 attribute from the tspec & make it those of this
493 //DCL_TYPE (p) == UPOINTER &&
496 if (!IS_SPEC (sym->etype))
498 sym->etype = sym->etype->next = newLink (SPECIFIER);
500 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
501 DCL_TSPEC (p) = NULL;
504 // if there is a function in this type chain
505 if (p && funcInChain(sym->type)) {
506 processFuncArgs (sym);
512 /*------------------------------------------------------------------
513 checkTypeSanity: prevent the user from doing e.g.:
515 ------------------------------------------------------------------*/
516 void checkTypeSanity(sym_link *etype, char *name) {
520 if (getenv("DEBUG_SANITY")) {
521 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
526 if (!IS_SPEC(etype)) {
527 if (getenv("DEBUG_SANITY")) {
528 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
533 noun=nounName(etype);
535 if (getenv("DEBUG_SANITY")) {
536 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
539 if ((SPEC_NOUN(etype)==V_CHAR ||
540 SPEC_NOUN(etype)==V_FLOAT ||
541 SPEC_NOUN(etype)==V_DOUBLE ||
542 SPEC_NOUN(etype)==V_VOID) &&
543 (etype->select.s._short || SPEC_LONG(etype))) {
544 // long or short for char float double or void
545 werror (E_LONG_OR_SHORT_INVALID, noun, name);
547 if ((SPEC_NOUN(etype)==V_FLOAT ||
548 SPEC_NOUN(etype)==V_DOUBLE ||
549 SPEC_NOUN(etype)==V_VOID) &&
550 (etype->select.s._signed || SPEC_USIGN(etype))) {
551 // signed or unsigned for float double or void
552 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
555 // special case for "short"
556 if (etype->select.s._short) {
557 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
558 etype->select.s._short = 0;
562 "const a;" or "data b;" or "signed s" or "long l"
564 if (!SPEC_NOUN(etype)) {
565 SPEC_NOUN(etype)=V_INT;
568 if (etype->select.s._signed && SPEC_USIGN(etype)) {
569 // signed AND unsigned
570 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
572 if (etype->select.s._short && SPEC_LONG(etype)) {
574 werror (E_LONG_AND_SHORT_INVALID, noun, name);
579 /*------------------------------------------------------------------*/
580 /* mergeSpec - merges two specifiers and returns the new one */
581 /*------------------------------------------------------------------*/
583 mergeSpec (sym_link * dest, sym_link * src, char *name)
585 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
587 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
590 werror (E_SYNTAX_ERROR, yytext);
591 // the show must go on
596 if (SPEC_NOUN(src)) {
597 if (!SPEC_NOUN(dest)) {
598 SPEC_NOUN(dest)=SPEC_NOUN(src);
600 /* we shouldn't redeclare the type */
601 if (getenv("DEBUG_SANITY")) {
602 fprintf (stderr, "mergeSpec: ");
604 werror(E_TWO_OR_MORE_DATA_TYPES, name);
608 if (SPEC_SCLS(src)) {
609 /* if destination has no storage class */
610 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
611 SPEC_SCLS (dest) = SPEC_SCLS (src);
613 if (getenv("DEBUG_SANITY")) {
614 fprintf (stderr, "mergeSpec: ");
616 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
620 /* copy all the specifications */
622 // we really should do:
624 if (SPEC_what(src)) {
625 if (SPEC_what(dest)) {
626 werror(W_DUPLICATE_SPEC, "what");
628 SPEC_what(dst)|=SPEC_what(src);
631 // but there are more important thing right now
633 SPEC_LONG (dest) |= SPEC_LONG (src);
634 dest->select.s._short|=src->select.s._short;
635 SPEC_USIGN (dest) |= SPEC_USIGN (src);
636 dest->select.s._signed|=src->select.s._signed;
637 SPEC_STAT (dest) |= SPEC_STAT (src);
638 SPEC_EXTR (dest) |= SPEC_EXTR (src);
639 SPEC_CONST(dest) |= SPEC_CONST (src);
640 SPEC_ABSA (dest) |= SPEC_ABSA (src);
641 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
642 SPEC_ADDR (dest) |= SPEC_ADDR (src);
643 SPEC_OCLS (dest) = SPEC_OCLS (src);
644 SPEC_BLEN (dest) |= SPEC_BLEN (src);
645 SPEC_BSTR (dest) |= SPEC_BSTR (src);
646 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
647 SPEC_ENUM (dest) |= SPEC_ENUM (src);
648 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
649 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
651 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
652 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
654 /* these are the only function attributes that will be set
655 in a specifier while parsing */
656 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
657 FUNC_BANKED(dest) |= FUNC_BANKED(src);
658 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
659 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
660 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
661 FUNC_ISISR(dest) |= FUNC_ISISR(src);
662 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
663 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
664 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
665 FUNC_INTNO(dest) |= FUNC_INTNO(src);
666 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
671 /*------------------------------------------------------------------*/
672 /* genSymName - generates and returns a name used for anonymous vars */
673 /*------------------------------------------------------------------*/
675 genSymName (int level)
677 static int gCount = 0;
678 static char gname[SDCC_NAME_MAX + 1];
680 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
684 /*------------------------------------------------------------------*/
685 /* getSpec - returns the specifier part from a declaration chain */
686 /*------------------------------------------------------------------*/
688 getSpec (sym_link * p)
693 while (p && !(IS_SPEC (p)))
699 /*------------------------------------------------------------------*/
700 /* newCharLink() - creates an char type */
701 /*------------------------------------------------------------------*/
707 p = newLink (SPECIFIER);
708 SPEC_NOUN (p) = V_CHAR;
713 /*------------------------------------------------------------------*/
714 /* newFloatLink - a new Float type */
715 /*------------------------------------------------------------------*/
721 p = newLink (SPECIFIER);
722 SPEC_NOUN (p) = V_FLOAT;
727 /*------------------------------------------------------------------*/
728 /* newLongLink() - new long type */
729 /*------------------------------------------------------------------*/
735 p = newLink (SPECIFIER);
736 SPEC_NOUN (p) = V_INT;
742 /*------------------------------------------------------------------*/
743 /* newIntLink() - creates an int type */
744 /*------------------------------------------------------------------*/
750 p = newLink (SPECIFIER);
751 SPEC_NOUN (p) = V_INT;
756 /*------------------------------------------------------------------*/
757 /* getSize - returns size of a type chain in bits */
758 /*------------------------------------------------------------------*/
760 getSize (sym_link * p)
762 /* if nothing return 0 */
766 { /* if this is the specifier then */
767 switch (SPEC_NOUN (p))
768 { /* depending on the specifier type */
770 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
778 return SPEC_STRUCT (p)->size;
785 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
791 /* this is a specifier */
792 switch (DCL_TYPE (p))
796 return DCL_ELEM (p) * getSize (p->next);
798 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
799 // "can not tell the size of an array[]");
819 /*------------------------------------------------------------------*/
820 /* bitsForType - returns # of bits required to store this type */
821 /*------------------------------------------------------------------*/
823 bitsForType (sym_link * p)
825 /* if nothing return 0 */
830 { /* if this is the specifier then */
832 switch (SPEC_NOUN (p))
833 { /* depending on the specifier type */
835 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
837 return FLOATSIZE * 8;
843 return SPEC_STRUCT (p)->size * 8;
850 return SPEC_BLEN (p);
856 /* this is a specifier */
857 switch (DCL_TYPE (p))
860 return DCL_ELEM (p) * getSize (p->next) * 8;
864 return (PTRSIZE * 8);
869 return (FPTRSIZE * 8);
871 return (GPTRSIZE * 8);
878 /*------------------------------------------------------------------*/
879 /* copySymbolChain - copies a symbol chain */
880 /*------------------------------------------------------------------*/
882 copySymbolChain (symbol * src)
889 dest = copySymbol (src);
890 dest->next = copySymbolChain (src->next);
894 /*------------------------------------------------------------------*/
895 /* copySymbol - makes a copy of a symbol */
896 /*------------------------------------------------------------------*/
898 copySymbol (symbol * src)
905 dest = newSymbol (src->name, src->level);
906 memcpy (dest, src, sizeof (symbol));
907 dest->level = src->level;
908 dest->block = src->block;
909 dest->ival = copyIlist (src->ival);
910 dest->type = copyLinkChain (src->type);
911 dest->etype = getSpec (dest->type);
913 dest->key = src->key;
914 dest->allocreq = src->allocreq;
918 /*------------------------------------------------------------------*/
919 /* reverseSyms - reverses the links for a symbol chain */
920 /*------------------------------------------------------------------*/
922 reverseSyms (symbol * sym)
924 symbol *prev, *curr, *next;
939 sym->next = (void *) NULL;
943 /*------------------------------------------------------------------*/
944 /* reverseLink - reverses the links for a type chain */
945 /*------------------------------------------------------------------*/
947 reverseLink (sym_link * type)
949 sym_link *prev, *curr, *next;
964 type->next = (void *) NULL;
968 /*------------------------------------------------------------------*/
969 /* addSymChain - adds a symbol chain to the symboltable */
970 /*------------------------------------------------------------------*/
972 addSymChain (symbol * symHead)
974 symbol *sym = symHead;
977 for (; sym != NULL; sym = sym->next)
980 checkTypeSanity(sym->etype, sym->name);
982 /* if already exists in the symbol table then check if
983 one of them is an extern definition if yes then
984 then check if the type match, if the types match then
985 delete the current entry and add the new entry */
986 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
987 csym->level == sym->level) {
989 /* one definition extern ? */
990 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype)) {
991 /* do types match ? */
992 //checkDecl (sym, IS_EXTERN (sym->etype));
993 if (compareTypeExact (csym->type, sym->type, sym->level) != 1) {
995 werror (E_EXTERN_MISMATCH, csym->name);
996 printFromToType (csym->type, sym->type);
1001 //checkDecl (sym, 0);
1002 if (compareTypeExact (csym->type, sym->type, sym->level) != 1) {
1003 werror (E_DUPLICATE, sym->name);
1004 printFromToType (csym->type, sym->type);
1008 /* delete current entry */
1009 deleteSym (SymbolTab, csym, csym->name);
1010 deleteFromSeg(csym);
1014 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1019 /*------------------------------------------------------------------*/
1020 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1021 /*------------------------------------------------------------------*/
1023 funcInChain (sym_link * lnk)
1034 /*------------------------------------------------------------------*/
1035 /* structElemType - returns the type info of a struct member */
1036 /*------------------------------------------------------------------*/
1038 structElemType (sym_link * stype, value * id)
1040 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1041 sym_link *type, *etype;
1042 sym_link *petype = getSpec (stype);
1046 /* look for the id */
1049 if (strcmp (fields->rname, id->name) == 0)
1051 type = copyLinkChain (fields->type);
1052 etype = getSpec (type);
1053 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1054 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1056 SPEC_CONST (type) |= SPEC_CONST (stype);
1058 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1061 fields = fields->next;
1065 werror (E_NOT_MEMBER, id->name);
1067 // the show must go on
1068 return newIntLink();
1071 /*------------------------------------------------------------------*/
1072 /* getStructElement - returns element of a tructure definition */
1073 /*------------------------------------------------------------------*/
1075 getStructElement (structdef * sdef, symbol * sym)
1079 for (field = sdef->fields; field; field = field->next)
1080 if (strcmp (field->name, sym->name) == 0)
1083 werror (E_NOT_MEMBER, sym->name);
1085 return sdef->fields;
1088 /*------------------------------------------------------------------*/
1089 /* compStructSize - computes the size of a structure */
1090 /*------------------------------------------------------------------*/
1092 compStructSize (int su, structdef * sdef)
1094 int sum = 0, usum = 0;
1098 /* for the identifiers */
1099 loop = sdef->fields;
1102 /* create the internal name for this variable */
1103 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1108 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1110 /* if this is a bit field */
1113 /* change it to a unsigned bit */
1114 SPEC_NOUN (loop->etype) = V_BITFIELD;
1115 SPEC_USIGN (loop->etype) = 1;
1116 SPEC_BLEN (loop->etype) = loop->bitVar;
1118 if (loop->bitVar == BITVAR_PAD) {
1119 /* A zero length bitfield forces padding */
1120 SPEC_BSTR (loop->etype) = bitOffset;
1121 SPEC_BLEN (loop->etype) = 0;
1126 if (bitOffset == 8) {
1130 /* check if this fit into the remaining */
1131 /* bits of this byte else align it to the */
1132 /* next byte boundary */
1133 if (loop->bitVar <= (8 - bitOffset)) {
1134 /* fits into current byte */
1136 SPEC_BSTR (loop->etype) = bitOffset;
1137 bitOffset += loop->bitVar;
1139 else if (!bitOffset) {
1140 /* does not fit, but is already byte aligned */
1142 SPEC_BSTR (loop->etype) = bitOffset;
1143 bitOffset += loop->bitVar;
1146 /* does not fit; need to realign first */
1148 loop->offset = (su == UNION ? sum = 0 : sum);
1150 SPEC_BSTR (loop->etype) = bitOffset;
1151 bitOffset += loop->bitVar;
1153 while (bitOffset>8) {
1160 /* This is a non-bit field. Make sure we are */
1161 /* byte aligned first */
1164 loop->offset = (su == UNION ? sum = 0 : sum);
1168 checkDecl (loop, 1);
1169 sum += getSize (loop->type);
1174 /* if union then size = sizeof larget field */
1176 /* For UNION, round up after each field */
1177 sum += ((bitOffset+7)/8);
1178 usum = max (usum, sum);
1183 /* For STRUCT, round up after all fields processed */
1185 sum += ((bitOffset+7)/8);
1187 return (su == UNION ? usum : sum);
1190 /*------------------------------------------------------------------*/
1191 /* checkSClass - check the storage class specification */
1192 /*------------------------------------------------------------------*/
1194 checkSClass (symbol * sym, int isProto)
1198 if (getenv("DEBUG_SANITY")) {
1199 fprintf (stderr, "checkSClass: %s \n", sym->name);
1202 /* type is literal can happen for enums change
1204 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1205 SPEC_SCLS (sym->etype) = S_AUTO;
1207 /* if sfr or sbit then must also be volatile */
1208 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1209 SPEC_SCLS (sym->etype) == S_SFR)
1211 SPEC_VOLATILE (sym->etype) = 1;
1214 /* if absolute address given then it mark it as
1215 volatile -- except in the PIC port */
1217 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1218 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1219 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1222 if (IS_ABSOLUTE (sym->etype))
1223 SPEC_VOLATILE (sym->etype) = 1;
1225 /* If code memory is read only, then pointers to code memory */
1226 /* implicitly point to constants -- make this explicit */
1228 while (t && t->next) {
1229 if (IS_CODEPTR(t) && port->mem.code_ro) {
1230 if (IS_SPEC(t->next)) {
1231 SPEC_CONST (t->next) = 1;
1233 DCL_PTR_CONST (t->next) = 1;
1239 /* global variables declared const put into code */
1240 /* if no other storage class specified */
1241 if (sym->level == 0 &&
1242 SPEC_SCLS(sym->etype) == S_FIXED &&
1243 !IS_FUNC(sym->type)) {
1244 /* find the first non-array link */
1248 if (IS_CONSTANT (t)) {
1249 SPEC_SCLS (sym->etype) = S_CODE;
1253 /* global variable in code space is a constant */
1254 if (sym->level == 0 &&
1255 SPEC_SCLS (sym->etype) == S_CODE &&
1256 port->mem.code_ro) {
1257 /* find the first non-array link */
1264 DCL_PTR_CONST (t) = 1;
1268 /* if bit variable then no storage class can be */
1269 /* specified since bit is already a storage */
1270 if (IS_BITVAR (sym->etype) &&
1271 (SPEC_SCLS (sym->etype) != S_FIXED &&
1272 SPEC_SCLS (sym->etype) != S_SBIT &&
1273 SPEC_SCLS (sym->etype) != S_BIT)
1276 werror (E_BITVAR_STORAGE, sym->name);
1277 SPEC_SCLS (sym->etype) = S_FIXED;
1280 /* extern variables cannot be initialized */
1281 if (IS_EXTERN (sym->etype) && sym->ival)
1283 werror (E_EXTERN_INIT, sym->name);
1287 /* if this is an automatic symbol */
1288 if (sym->level && (options.stackAuto || reentrant)) {
1289 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1290 SPEC_SCLS (sym->etype) == S_FIXED ||
1291 SPEC_SCLS (sym->etype) == S_REGISTER ||
1292 SPEC_SCLS (sym->etype) == S_STACK ||
1293 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1294 SPEC_SCLS (sym->etype) = S_AUTO;
1296 /* storage class may only be specified for statics */
1297 if (!IS_STATIC(sym->etype)) {
1298 werror (E_AUTO_ASSUMED, sym->name);
1303 /* automatic symbols cannot be given */
1304 /* an absolute address ignore it */
1306 SPEC_ABSA (sym->etype) &&
1307 (options.stackAuto || reentrant))
1309 werror (E_AUTO_ABSA, sym->name);
1310 SPEC_ABSA (sym->etype) = 0;
1313 /* arrays & pointers cannot be defined for bits */
1314 /* SBITS or SFRs or BIT */
1315 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1316 (SPEC_NOUN (sym->etype) == V_BIT ||
1317 SPEC_NOUN (sym->etype) == V_SBIT ||
1318 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1319 SPEC_SCLS (sym->etype) == S_SFR))
1320 werror (E_BIT_ARRAY, sym->name);
1322 /* if this is a bit|sbit then set length & start */
1323 if (SPEC_NOUN (sym->etype) == V_BIT ||
1324 SPEC_NOUN (sym->etype) == V_SBIT)
1326 SPEC_BLEN (sym->etype) = 1;
1327 SPEC_BSTR (sym->etype) = 0;
1331 /* variables declared in CODE space must have */
1332 /* initializers if not an extern */
1333 if (SPEC_SCLS (sym->etype) == S_CODE &&
1334 sym->ival == NULL &&
1336 port->mem.code_ro &&
1337 !IS_EXTERN (sym->etype) &&
1338 !funcInChain (sym->type))
1339 werror (E_CODE_NO_INIT, sym->name);
1342 /* if parameter or local variable then change */
1343 /* the storage class to reflect where the var will go */
1344 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED &&
1345 !IS_STATIC(sym->etype))
1347 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1349 SPEC_SCLS (sym->etype) = (options.useXstack ?
1350 S_XSTACK : S_STACK);
1354 /* hack-o-matic! I see no reason why the useXstack option should ever
1355 * control this allcoation, but the code was originally that way, and
1356 * changing it for non-390 ports breaks the compiler badly.
1358 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1359 1 : options.useXstack;
1360 SPEC_SCLS (sym->etype) = (useXdata ?
1366 /*------------------------------------------------------------------*/
1367 /* changePointer - change pointer to functions */
1368 /*------------------------------------------------------------------*/
1370 changePointer (symbol * sym)
1374 /* go thru the chain of declarations */
1375 /* if we find a pointer to a function */
1376 /* unconditionally change it to a ptr */
1378 for (p = sym->type; p; p = p->next)
1380 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1381 DCL_TYPE (p) = port->unqualified_pointer;
1382 if (IS_PTR (p) && IS_FUNC (p->next))
1383 DCL_TYPE (p) = CPOINTER;
1387 /*------------------------------------------------------------------*/
1388 /* checkDecl - does semantic validation of a declaration */
1389 /*------------------------------------------------------------------*/
1391 checkDecl (symbol * sym, int isProto)
1394 checkSClass (sym, isProto); /* check the storage class */
1395 changePointer (sym); /* change pointers if required */
1397 /* if this is an array without any dimension
1398 then update the dimension from the initial value */
1399 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1400 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1405 /*------------------------------------------------------------------*/
1406 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1407 /*------------------------------------------------------------------*/
1409 copyLinkChain (sym_link * p)
1411 sym_link *head, *curr, *loop;
1414 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1417 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1418 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1427 /*------------------------------------------------------------------*/
1428 /* cleanUpBlock - cleansup the symbol table specified for all the */
1429 /* symbols in the given block */
1430 /*------------------------------------------------------------------*/
1432 cleanUpBlock (bucket ** table, int block)
1437 /* go thru the entire table */
1438 for (i = 0; i < 256; i++)
1440 for (chain = table[i]; chain; chain = chain->next)
1442 if (chain->block >= block)
1444 deleteSym (table, chain->sym, chain->name);
1450 /*------------------------------------------------------------------*/
1451 /* cleanUpLevel - cleansup the symbol table specified for all the */
1452 /* symbols in the given level */
1453 /*------------------------------------------------------------------*/
1455 cleanUpLevel (bucket ** table, int level)
1460 /* go thru the entire table */
1461 for (i = 0; i < 256; i++)
1463 for (chain = table[i]; chain; chain = chain->next)
1465 if (chain->level >= level)
1467 deleteSym (table, chain->sym, chain->name);
1473 /*------------------------------------------------------------------*/
1474 /* computeType - computes the resultant type from two types */
1475 /*------------------------------------------------------------------*/
1477 computeType (sym_link * type1, sym_link * type2)
1481 sym_link *etype1 = getSpec (type1);
1482 sym_link *etype2 = getSpec (type2);
1484 /* if one of them is a float then result is a float */
1485 /* here we assume that the types passed are okay */
1486 /* and can be cast to one another */
1487 /* which ever is greater in size */
1488 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1489 rType = newFloatLink ();
1491 /* if only one of them is a bit variable
1492 then the other one prevails */
1493 if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1494 rType = copyLinkChain (type2);
1495 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1496 rType = copyLinkChain (type1);
1498 /* if one of them is a pointer or array then that
1500 if (IS_PTR (type1) || IS_ARRAY (type1))
1501 rType = copyLinkChain (type1);
1502 else if (IS_PTR (type2) || IS_ARRAY (type2))
1503 rType = copyLinkChain (type2);
1504 else if (getSize (type1) > getSize (type2))
1505 rType = copyLinkChain (type1);
1507 rType = copyLinkChain (type2);
1509 reType = getSpec (rType);
1511 if (SPEC_NOUN (reType) == V_CHAR)
1512 SPEC_NOUN (reType) = V_INT;
1515 /* if either of them unsigned but not val then make this unsigned */
1516 if ((SPEC_USIGN (etype1) || SPEC_USIGN (etype2)) &&
1518 SPEC_USIGN (reType) = 1;
1520 SPEC_USIGN (reType) = 0;
1522 /* if result is a literal then make not so */
1523 if (IS_LITERAL (reType))
1524 SPEC_SCLS (reType) = S_REGISTER;
1529 /*--------------------------------------------------------------------*/
1530 /* compareType - will do type check return 1 if match, -1 if castable */
1531 /*--------------------------------------------------------------------*/
1533 compareType (sym_link * dest, sym_link * src)
1544 /* if dest is a declarator then */
1549 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1551 //checkFunction(src,dest);
1553 return compareType (dest->next, src->next);
1555 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1558 if (IS_PTR (src) && IS_GENPTR (dest))
1560 if (IS_PTR (dest) && IS_ARRAY (src)) {
1561 value *val=aggregateToPointer (valFromType(src));
1562 int res=compareType (dest, val->type);
1563 Safe_free(val->type);
1567 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1568 return compareType (dest->next, src);
1571 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1577 /* if one is a specifier and the other is not */
1578 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1579 (IS_SPEC (dest) && !IS_SPEC (src)))
1582 /* if one of them is a void then ok */
1583 if (SPEC_NOUN (dest) == V_VOID &&
1584 SPEC_NOUN (src) != V_VOID)
1587 if (SPEC_NOUN (dest) != V_VOID &&
1588 SPEC_NOUN (src) == V_VOID)
1591 /* if they are both bitfields then if the lengths
1592 and starts don't match */
1593 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1594 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1595 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1598 /* it is a specifier */
1599 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1601 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1602 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1603 getSize (dest) == getSize (src))
1605 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1610 else if (IS_STRUCT (dest))
1612 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1617 if (SPEC_LONG (dest) != SPEC_LONG (src))
1620 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1626 /*--------------------------------------------------------------------*/
1627 /* compareTypeExact - will do type check return 1 if match exactly */
1628 /*--------------------------------------------------------------------*/
1630 compareTypeExact (sym_link * dest, sym_link * src, int level)
1632 STORAGE_CLASS srcScls, destScls;
1643 /* if dest is a declarator then */
1648 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1649 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
1651 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
1653 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
1656 return compareTypeExact (dest->next, src->next, -1);
1657 return compareTypeExact (dest->next, src->next, level);
1664 /* if one is a specifier and the other is not */
1665 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1666 (IS_SPEC (dest) && !IS_SPEC (src)))
1669 /* if one of them is a void then ok */
1670 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1673 /* if they are both bitfields then if the lengths
1674 and starts don't match */
1675 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1676 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1677 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1680 if (IS_INTEGRAL (dest))
1682 /* signedness must match */
1683 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1685 /* size must match */
1686 if (SPEC_LONG (dest) != SPEC_LONG (src))
1688 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
1692 if (IS_STRUCT (dest))
1694 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1698 if (SPEC_CONST (dest) != SPEC_CONST (src))
1700 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
1702 if (SPEC_STAT (dest) != SPEC_STAT (src))
1705 destScls = SPEC_SCLS (dest);
1706 srcScls = SPEC_SCLS (src);
1708 /* Compensate for const to const code change in checkSClass() */
1709 if (!level & port->mem.code_ro && SPEC_CONST (dest))
1711 if (srcScls == S_CODE && destScls == S_FIXED)
1713 if (destScls == S_CODE && srcScls == S_FIXED)
1717 /* compensate for allocGlobal() */
1718 if ((srcScls == S_FIXED || srcScls == S_AUTO)
1719 && port->mem.default_globl_map == xdata
1723 if (level>0 && !SPEC_STAT (dest))
1725 /* Compensate for hack-o-matic in checkSClass() */
1726 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1728 if (destScls == S_FIXED)
1729 destScls = (options.useXstack ? S_XSTACK : S_STACK);
1730 if (srcScls == S_FIXED)
1731 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
1733 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
1735 if (destScls == S_FIXED)
1737 if (srcScls == S_FIXED)
1742 if (srcScls != destScls)
1744 printf ("level = %d\n", level);
1745 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
1746 SPEC_SCLS (src), SPEC_SCLS (dest));
1747 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
1754 /*------------------------------------------------------------------*/
1755 /* inCalleeSaveList - return 1 if found in callee save list */
1756 /*------------------------------------------------------------------*/
1758 calleeCmp(void *p1, void *p2)
1760 return (strcmp((char *)p1, (char *)(p2)) == 0);
1764 inCalleeSaveList(char *s)
1766 if (options.all_callee_saves)
1768 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
1771 /*-----------------------------------------------------------------*/
1772 /* aggregateToPointer: change an agggregate type function */
1773 /* argument to a pointer to that type. */
1774 /*-----------------------------------------------------------------*/
1776 aggregateToPointer (value * val)
1778 if (IS_AGGREGATE (val->type))
1780 /* if this is a structure */
1781 /* then we need to add a new link */
1782 if (IS_STRUCT (val->type))
1784 /* first lets add DECLARATOR type */
1785 sym_link *p = val->type;
1787 werror (W_STRUCT_AS_ARG, val->name);
1788 val->type = newLink (DECLARATOR);
1789 val->type->next = p;
1792 /* change to a pointer depending on the */
1793 /* storage class specified */
1794 switch (SPEC_SCLS (val->etype))
1797 DCL_TYPE (val->type) = IPOINTER;
1800 DCL_TYPE (val->type) = PPOINTER;
1803 if (SPEC_OCLS(val->etype)) {
1804 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
1806 // this happens for (external) function parameters
1807 DCL_TYPE (val->type) = port->unqualified_pointer;
1813 DCL_TYPE (val->type) = POINTER;
1816 DCL_TYPE (val->type) = CPOINTER;
1819 DCL_TYPE (val->type) = FPOINTER;
1822 DCL_TYPE (val->type) = EEPPOINTER;
1825 DCL_TYPE (val->type) = port->unqualified_pointer;
1828 /* is there is a symbol associated then */
1829 /* change the type of the symbol as well */
1832 val->sym->type = copyLinkChain (val->type);
1833 val->sym->etype = getSpec (val->sym->type);
1838 /*------------------------------------------------------------------*/
1839 /* checkFunction - does all kinds of check on a function */
1840 /*------------------------------------------------------------------*/
1842 checkFunction (symbol * sym, symbol *csym)
1844 value *exargs, *acargs;
1848 if (getenv("DEBUG_SANITY")) {
1849 fprintf (stderr, "checkFunction: %s ", sym->name);
1852 /* make sure the type is complete and sane */
1853 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
1855 /* if not type then some kind of error */
1859 /* if the function has no type then make it return int */
1860 if (!sym->type->next)
1861 sym->type->next = sym->etype = newIntLink ();
1863 /* function cannot return aggregate */
1864 if (IS_AGGREGATE (sym->type->next))
1866 werror (E_FUNC_AGGR, sym->name);
1870 /* function cannot return bit */
1871 if (IS_BITVAR (sym->type->next))
1873 werror (E_FUNC_BIT, sym->name);
1877 /* check if this function is defined as calleeSaves
1878 then mark it as such */
1879 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
1881 /* if interrupt service routine */
1882 /* then it cannot have arguments */
1883 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
1885 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
1886 werror (E_INT_ARGS, sym->name);
1887 FUNC_ARGS(sym->type)=NULL;
1891 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
1893 acargs=acargs->next, argCnt++) {
1895 // this can happen for reentrant functions
1896 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1897 // the show must go on: synthesize a name and symbol
1898 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
1899 acargs->sym = newSymbol (acargs->name, 1);
1900 SPEC_OCLS (acargs->etype) = istack;
1901 acargs->sym->type = copyLinkChain (acargs->type);
1902 acargs->sym->etype = getSpec (acargs->sym->type);
1903 acargs->sym->_isparm = 1;
1904 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
1905 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
1907 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1912 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
1913 return 1; /* not defined nothing more to check */
1915 /* check if body already present */
1916 if (csym && IFFUNC_HASBODY(csym->type))
1918 werror (E_FUNC_BODY, sym->name);
1922 /* check the return value type */
1923 if (compareType (csym->type, sym->type) <= 0)
1925 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
1926 printFromToType(csym->type, sym->type);
1930 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
1932 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
1935 if (FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type))
1937 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
1940 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
1942 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
1945 /* Really, reentrant should match regardless of argCnt, but */
1946 /* this breaks some existing code (the fp lib functions). If */
1947 /* the first argument is always passed the same way, this */
1948 /* lax checking is ok (but may not be true for in future ports) */
1949 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
1952 //printf("argCnt = %d\n",argCnt);
1953 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
1956 /* compare expected args with actual args */
1957 exargs = FUNC_ARGS(csym->type);
1958 acargs = FUNC_ARGS(sym->type);
1960 /* for all the expected args do */
1963 exargs = exargs->next, acargs = acargs->next, argCnt++)
1965 if (getenv("DEBUG_SANITY")) {
1966 fprintf (stderr, "checkFunction: %s ", exargs->name);
1968 /* make sure the type is complete and sane */
1969 checkTypeSanity(exargs->etype, exargs->name);
1971 /* If the actual argument is an array, any prototype
1972 * will have modified it to a pointer. Duplicate that
1975 if (IS_AGGREGATE (acargs->type))
1977 checkValue = copyValue (acargs);
1978 aggregateToPointer (checkValue);
1982 checkValue = acargs;
1985 if (compareType (exargs->type, checkValue->type) <= 0)
1987 werror (E_ARG_TYPE, argCnt);
1988 printFromToType(exargs->type, checkValue->type);
1993 /* if one them ended we have a problem */
1994 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
1995 (!exargs && acargs && !IS_VOID (acargs->type)))
1996 werror (E_ARG_COUNT);
1998 /* replace with this defition */
1999 sym->cdef = csym->cdef;
2000 deleteSym (SymbolTab, csym, csym->name);
2001 deleteFromSeg(csym);
2002 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2003 if (IS_EXTERN (csym->etype) && !
2004 IS_EXTERN (sym->etype))
2006 addSet (&publics, sym);
2011 /*------------------------------------------------------------------*/
2012 /* cdbStructBlock - calls struct printing for a blcks */
2013 /*------------------------------------------------------------------*/
2014 void cdbStructBlock (int block)
2017 bucket **table = StructTab;
2020 /* go thru the entire table */
2021 for (i = 0; i < 256; i++)
2023 for (chain = table[i]; chain; chain = chain->next)
2025 if (chain->block >= block)
2028 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2034 /*-----------------------------------------------------------------*/
2035 /* processFuncArgs - does some processing with function args */
2036 /*-----------------------------------------------------------------*/
2038 processFuncArgs (symbol * func)
2042 sym_link *funcType=func->type;
2044 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2045 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2047 // if this is a pointer to a function
2048 if (IS_PTR(funcType)) {
2049 funcType=funcType->next;
2052 /* if this function has variable argument list */
2053 /* then make the function a reentrant one */
2054 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2055 FUNC_ISREENT(funcType)=1;
2057 /* check if this function is defined as calleeSaves
2058 then mark it as such */
2059 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2061 /* loop thru all the arguments */
2062 val = FUNC_ARGS(funcType);
2064 /* if it is void then remove parameters */
2065 if (val && IS_VOID (val->type))
2067 FUNC_ARGS(funcType) = NULL;
2071 /* reset regparm for the port */
2072 (*port->reset_regparms) ();
2073 /* if any of the arguments is an aggregate */
2074 /* change it to pointer to the same type */
2078 /* mark it as a register parameter if
2079 the function does not have VA_ARG
2080 and as port dictates */
2081 if (!IFFUNC_HASVARARGS(funcType) &&
2082 (argreg = (*port->reg_parm) (val->type)))
2084 SPEC_REGPARM (val->etype) = 1;
2085 SPEC_ARGREG(val->etype) = argreg;
2086 } else if (IFFUNC_ISREENT(funcType)) {
2087 FUNC_HASSTACKPARM(funcType) = 1;
2090 if (IS_AGGREGATE (val->type))
2092 aggregateToPointer (val);
2099 /* if this is an internal generated function call */
2101 /* ignore --stack-auto for this one, we don't know how it is compiled */
2102 /* simply trust on --int-long-reent or --float-reent */
2103 if (IFFUNC_ISREENT(funcType)) {
2107 /* if this function is reentrant or */
2108 /* automatics r 2b stacked then nothing */
2109 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2113 val = FUNC_ARGS(funcType);
2118 /* if a symbolname is not given */
2119 /* synthesize a variable name */
2122 SNPRINTF (val->name, sizeof(val->name),
2123 "_%s_PARM_%d", func->name, pNum++);
2124 val->sym = newSymbol (val->name, 1);
2125 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2126 val->sym->type = copyLinkChain (val->type);
2127 val->sym->etype = getSpec (val->sym->type);
2128 val->sym->_isparm = 1;
2129 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2130 if (IS_SPEC(func->etype)) {
2131 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2132 SPEC_STAT (func->etype);
2134 addSymChain (val->sym);
2137 else /* symbol name given create synth name */
2140 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2141 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2142 val->sym->_isparm = 1;
2143 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2144 (options.model != MODEL_SMALL ? xdata : data);
2145 if (IS_SPEC(func->etype)) {
2146 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2147 SPEC_STAT (func->etype);
2150 if (!isinSet(operKeyReset, val->sym)) {
2151 addSet (&operKeyReset, val->sym);
2152 applyToSet (operKeyReset, resetParmKey);
2158 /*-----------------------------------------------------------------*/
2159 /* isSymbolEqual - compares two symbols return 1 if they match */
2160 /*-----------------------------------------------------------------*/
2162 isSymbolEqual (symbol * dest, symbol * src)
2164 /* if pointers match then equal */
2168 /* if one of them is null then don't match */
2172 /* if both of them have rname match on rname */
2173 if (dest->rname[0] && src->rname[0])
2174 return (!strcmp (dest->rname, src->rname));
2176 /* otherwise match on name */
2177 return (!strcmp (dest->name, src->name));
2180 void PT(sym_link *type)
2182 printTypeChain(type,0);
2184 /*-----------------------------------------------------------------*/
2185 /* printTypeChain - prints the type chain in human readable form */
2186 /*-----------------------------------------------------------------*/
2188 printTypeChain (sym_link * start, FILE * of)
2192 sym_link * type, * search;
2202 fprintf (of, "void");
2206 /* Print the chain as it is written in the source: */
2207 /* start with the last entry. */
2208 /* However, the storage class at the end of the */
2209 /* chain reall applies to the first in the chain! */
2211 for (type = start; type && type->next; type = type->next)
2214 scls=SPEC_SCLS(type);
2222 case S_DATA: fprintf (of, "data-"); break;
2223 case S_XDATA: fprintf (of, "xdata-"); break;
2224 case S_SFR: fprintf (of, "sfr-"); break;
2225 case S_SBIT: fprintf (of, "sbit-"); break;
2226 case S_CODE: fprintf (of, "code-"); break;
2227 case S_IDATA: fprintf (of, "idata-"); break;
2228 case S_PDATA: fprintf (of, "pdata-"); break;
2229 case S_LITERAL: fprintf (of, "literal-"); break;
2230 case S_STACK: fprintf (of, "stack-"); break;
2231 case S_XSTACK: fprintf (of, "xstack-"); break;
2232 case S_BIT: fprintf (of, "bit-"); break;
2233 case S_EEPROM: fprintf (of, "eeprom-"); break;
2240 if (!IS_FUNC(type)) {
2241 if (DCL_PTR_VOLATILE (type)) {
2242 fprintf (of, "volatile-");
2244 if (DCL_PTR_CONST (type)) {
2245 fprintf (of, "const-");
2248 switch (DCL_TYPE (type))
2251 fprintf (of, "function %s %s",
2252 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2253 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2255 for (args = FUNC_ARGS(type);
2258 printTypeChain(args->type, of);
2265 fprintf (of, "generic* ");
2268 fprintf (of, "code* ");
2271 fprintf (of, "xdata* ");
2274 fprintf (of, "eeprom* ");
2277 fprintf (of, "near* ");
2280 fprintf (of, "idata* ");
2283 fprintf (of, "pdata* ");
2286 fprintf (of, "unknown* ");
2289 if (DCL_ELEM(type)) {
2290 fprintf (of, "[%d] ", DCL_ELEM(type));
2292 fprintf (of, "[] ");
2299 if (SPEC_VOLATILE (type))
2300 fprintf (of, "volatile-");
2301 if (SPEC_CONST (type))
2302 fprintf (of, "const-");
2303 if (SPEC_USIGN (type))
2304 fprintf (of, "unsigned-");
2305 switch (SPEC_NOUN (type))
2309 fprintf (of, "long-");
2310 fprintf (of, "int");
2314 fprintf (of, "char");
2318 fprintf (of, "void");
2322 fprintf (of, "float");
2326 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2330 fprintf (of, "sbit");
2334 fprintf (of, "bit");
2338 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2342 fprintf (of, "double");
2346 fprintf (of, "unknown type");
2350 /* search entry in list before "type" */
2351 for (search = start; search && search->next != type;)
2352 search = search->next;
2361 /*--------------------------------------------------------------------*/
2362 /* printTypeChainRaw - prints the type chain in human readable form */
2363 /* in the raw data structure ordering */
2364 /*--------------------------------------------------------------------*/
2366 printTypeChainRaw (sym_link * start, FILE * of)
2379 fprintf (of, "void");
2389 if (!IS_FUNC(type)) {
2390 if (DCL_PTR_VOLATILE (type)) {
2391 fprintf (of, "volatile-");
2393 if (DCL_PTR_CONST (type)) {
2394 fprintf (of, "const-");
2397 switch (DCL_TYPE (type))
2400 fprintf (of, "function %s %s",
2401 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2402 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2404 for (args = FUNC_ARGS(type);
2407 printTypeChain(args->type, of);
2414 fprintf (of, "generic* ");
2417 fprintf (of, "code* ");
2420 fprintf (of, "xdata* ");
2423 fprintf (of, "eeprom* ");
2426 fprintf (of, "near* ");
2429 fprintf (of, "idata* ");
2432 fprintf (of, "pdata* ");
2435 fprintf (of, "unknown* ");
2438 if (DCL_ELEM(type)) {
2439 fprintf (of, "[%d] ", DCL_ELEM(type));
2441 fprintf (of, "[] ");
2445 if (DCL_TSPEC(type))
2448 printTypeChainRaw(DCL_TSPEC(type), of);
2452 else if (IS_SPEC (type))
2454 switch (SPEC_SCLS (type))
2456 case S_DATA: fprintf (of, "data-"); break;
2457 case S_XDATA: fprintf (of, "xdata-"); break;
2458 case S_SFR: fprintf (of, "sfr-"); break;
2459 case S_SBIT: fprintf (of, "sbit-"); break;
2460 case S_CODE: fprintf (of, "code-"); break;
2461 case S_IDATA: fprintf (of, "idata-"); break;
2462 case S_PDATA: fprintf (of, "pdata-"); break;
2463 case S_LITERAL: fprintf (of, "literal-"); break;
2464 case S_STACK: fprintf (of, "stack-"); break;
2465 case S_XSTACK: fprintf (of, "xstack-"); break;
2466 case S_BIT: fprintf (of, "bit-"); break;
2467 case S_EEPROM: fprintf (of, "eeprom-"); break;
2470 if (SPEC_VOLATILE (type))
2471 fprintf (of, "volatile-");
2472 if (SPEC_CONST (type))
2473 fprintf (of, "const-");
2474 if (SPEC_USIGN (type))
2475 fprintf (of, "unsigned-");
2476 switch (SPEC_NOUN (type))
2480 fprintf (of, "long-");
2481 fprintf (of, "int");
2485 fprintf (of, "char");
2489 fprintf (of, "void");
2493 fprintf (of, "float");
2497 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2501 fprintf (of, "sbit");
2505 fprintf (of, "bit");
2509 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2513 fprintf (of, "double");
2517 fprintf (of, "unknown type");
2522 fprintf (of, "NOT_SPEC_OR_DECL");
2532 /*-----------------------------------------------------------------*/
2533 /* powof2 - returns power of two for the number if number is pow 2 */
2534 /*-----------------------------------------------------------------*/
2536 powof2 (unsigned long num)
2549 if (n1s > 1 || nshifts == 0)
2565 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2566 symbol *__muldiv[3][3][2];
2567 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2568 sym_link *__multypes[3][2];
2569 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2570 symbol *__conv[2][3][2];
2571 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2572 symbol *__rlrr[2][3][2];
2574 sym_link *floatType;
2577 _mangleFunctionName(char *in)
2579 if (port->getMangledFunctionName)
2581 return port->getMangledFunctionName(in);
2589 /*-----------------------------------------------------------------*/
2590 /* typeFromStr - create a typechain from an encoded string */
2591 /* basic types - 'c' - char */
2597 /* '*' - pointer - default (GPOINTER) */
2598 /* modifiers - 'u' - unsigned */
2599 /* pointer modifiers - 'g' - generic */
2603 /* 'F' - function */
2604 /* examples : "ig*" - generic int * */
2605 /* "cx*" - char xdata * */
2606 /* "ui" - unsigned int */
2607 /*-----------------------------------------------------------------*/
2608 sym_link *typeFromStr (char *s)
2610 sym_link *r = newLink(DECLARATOR);
2622 r->class = SPECIFIER;
2623 SPEC_NOUN(r) = V_CHAR;
2627 r->class = SPECIFIER;
2628 SPEC_NOUN(r) = V_INT;
2631 r->class = SPECIFIER;
2632 SPEC_NOUN(r) = V_INT;
2636 r->class = SPECIFIER;
2637 SPEC_NOUN(r) = V_FLOAT;
2640 r->class = SPECIFIER;
2641 SPEC_NOUN(r) = V_VOID;
2644 DCL_TYPE(r) = port->unqualified_pointer;
2651 assert(*(s+1)=='*');
2652 nr = newLink(DECLARATOR);
2657 DCL_TYPE(r) = GPOINTER;
2660 DCL_TYPE(r) = FPOINTER;
2663 DCL_TYPE(r) = CPOINTER;
2666 DCL_TYPE(r) = POINTER;
2669 DCL_TYPE(r) = FUNCTION;
2670 nr = newLink(DECLARATOR);
2673 DCL_TYPE(r) = CPOINTER;
2679 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
2680 "typeFromStr: unknown type");
2683 if (IS_SPEC(r) && usign) {
2692 /*-----------------------------------------------------------------*/
2693 /* initCSupport - create functions for C support routines */
2694 /*-----------------------------------------------------------------*/
2698 const char *smuldivmod[] =
2702 const char *sbwd[] =
2704 "char", "int", "long"
2710 const char *srlrr[] =
2715 int bwd, su, muldivmod, tofrom, rlrr;
2717 if (getenv("SDCC_NO_C_SUPPORT")) {
2718 /* for debugging only */
2722 floatType = newFloatLink ();
2724 for (bwd = 0; bwd < 3; bwd++)
2741 __multypes[bwd][0] = l;
2742 __multypes[bwd][1] = copyLinkChain (l);
2743 SPEC_USIGN (__multypes[bwd][1]) = 1;
2746 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
2747 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
2748 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
2749 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
2750 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
2751 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
2752 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
2753 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
2754 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
2755 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
2757 for (tofrom = 0; tofrom < 2; tofrom++)
2759 for (bwd = 0; bwd < 3; bwd++)
2761 for (su = 0; su < 2; su++)
2765 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
2766 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
2770 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
2771 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
2778 for (muldivmod = 0; muldivmod < 3; muldivmod++)
2780 for (bwd = 0; bwd < 3; bwd++)
2782 for (su = 0; su < 2; su++)
2784 SNPRINTF (buffer, sizeof(buffer),
2786 smuldivmod[muldivmod],
2789 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2790 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2795 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
2796 Therefore they've been merged into mulint() and mullong().
2799 for (bwd = 0; bwd < 3; bwd++)
2801 for (su = 0; su < 2; su++)
2803 for (muldivmod = 1; muldivmod < 3; muldivmod++)
2806 SNPRINTF (buffer, sizeof(buffer),
2808 smuldivmod[muldivmod],
2811 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2812 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2820 for (su = 0; su < 2; su++)
2822 /* muluchar and mulschar are still separate functions, because e.g. the z80
2823 port is sign/zero-extending to int before calling mulint() */
2824 SNPRINTF (buffer, sizeof(buffer),
2826 smuldivmod[muldivmod],
2829 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2830 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2834 /* word and doubleword */
2835 for (bwd = 1; bwd < 3; bwd++)
2838 SNPRINTF (buffer, sizeof(buffer),
2840 smuldivmod[muldivmod],
2842 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2843 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
2844 /* signed = unsigned */
2845 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
2848 for (rlrr = 0; rlrr < 2; rlrr++)
2850 for (bwd = 0; bwd < 3; bwd++)
2852 for (su = 0; su < 2; su++)
2854 SNPRINTF (buffer, sizeof(buffer),
2859 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
2860 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
2866 /*-----------------------------------------------------------------*/
2867 /* initBuiltIns - create prototypes for builtin functions */
2868 /*-----------------------------------------------------------------*/
2874 if (!port->builtintable) return ;
2876 for (i = 0 ; port->builtintable[i].name ; i++) {
2877 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
2878 port->builtintable[i].nParms,port->builtintable[i].parm_types);
2879 FUNC_ISBUILTIN(sym->type) = 1;
2880 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
2884 sym_link *validateLink(sym_link *l,
2891 if (l && l->class==select)
2896 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
2897 " expected %s, got %s\n",
2898 macro, args, file, line,
2899 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
2901 return l; // never reached, makes compiler happy.