1 /* symbols.c -symbol table-
2 Copyright (C) 1987, 1990, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* #define DEBUG_SYMS / * to debug symbol list maintenance */
27 #include "obstack.h" /* For "symbols.h" */
30 #ifndef WORKING_DOT_WORD
31 extern int new_broken_words;
34 /* symbol-name => struct symbol pointer */
35 static struct hash_control *sy_hash;
37 /* Below are commented in "symbols.h". */
38 symbolS *symbol_rootP;
39 symbolS *symbol_lastP;
43 #define debug_verify_symchain verify_symbol_chain
45 #define debug_verify_symchain (void)
50 static void fb_label_init PARAMS ((void));
54 Return a pointer to a new symbol. Die if we can't make a new
55 symbol. Fill in the symbol's values. Add symbol to end of symbol
58 This function should be called in the general case of creating a
59 symbol. However, if the output file symbol table has already been
60 set, and you are certain that this symbol won't be wanted in the
61 output file, you can call symbol_create. */
64 symbol_new (name, segment, valu, frag)
70 symbolS *symbolP = symbol_create (name, segment, valu, frag);
73 * Link to end of symbol chain.
77 extern int symbol_table_frozen;
78 if (symbol_table_frozen)
82 symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
83 debug_verify_symchain (symbol_rootP, symbol_lastP);
89 symbol_create (name, segment, valu, frag)
90 const char *name; /* It is copied, the caller can destroy/modify */
91 segT segment; /* Segment identifier (SEG_<something>) */
92 valueT valu; /* Symbol value */
93 fragS *frag; /* Associated fragment */
95 unsigned int name_length;
96 char *preserved_copy_of_name;
99 name_length = strlen (name) + 1; /* +1 for \0 */
100 obstack_grow (¬es, name, name_length);
101 preserved_copy_of_name = obstack_finish (¬es);
102 #ifdef STRIP_UNDERSCORE
103 if (preserved_copy_of_name[0] == '_')
104 preserved_copy_of_name++;
107 #ifdef tc_canonicalize_symbol_name
108 preserved_copy_of_name =
109 tc_canonicalize_symbol_name (preserved_copy_of_name);
112 symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS));
114 /* symbol must be born in some fixed state. This seems as good as any. */
115 memset (symbolP, 0, sizeof (symbolS));
118 symbolP->bsym = bfd_make_empty_symbol (stdoutput);
119 assert (symbolP->bsym != 0);
120 symbolP->bsym->udata.p = (PTR) symbolP;
122 S_SET_NAME (symbolP, preserved_copy_of_name);
124 S_SET_SEGMENT (symbolP, segment);
125 S_SET_VALUE (symbolP, valu);
126 symbol_clear_list_pointers (symbolP);
128 symbolP->sy_frag = frag;
129 #ifndef BFD_ASSEMBLER
130 symbolP->sy_number = ~0;
131 symbolP->sy_name_offset = (unsigned int) ~0;
134 obj_symbol_new_hook (symbolP);
136 #ifdef tc_symbol_new_hook
137 tc_symbol_new_hook (symbolP);
147 * We have just seen "<name>:".
148 * Creates a struct symbol unless it already exists.
150 * Gripes if we are redefining a symbol incompatibly (and ignores it).
154 colon (sym_name) /* just seen "x:" - rattle symbols & frags */
155 register char *sym_name; /* symbol name, as a cannonical string */
156 /* We copy this string: OK to alter later. */
158 register symbolS *symbolP; /* symbol we are working with */
160 #ifdef LOCAL_LABELS_DOLLAR
161 /* Sun local labels go out of scope whenever a non-local symbol is
164 if (*sym_name != 'L')
165 dollar_label_clear ();
166 #endif /* LOCAL_LABELS_DOLLAR */
168 #ifndef WORKING_DOT_WORD
169 if (new_broken_words)
171 struct broken_word *a;
176 extern const int md_short_jump_size;
177 extern const int md_long_jump_size;
178 possible_bytes = (md_short_jump_size
179 + new_broken_words * md_long_jump_size);
182 frag_opcode = frag_var (rs_broken_word,
186 (symbolS *) broken_words,
190 /* We want to store the pointer to where to insert the jump table in the
191 fr_opcode of the rs_broken_word frag. This requires a little
194 && (frag_tmp->fr_type != rs_broken_word
195 || frag_tmp->fr_opcode))
196 frag_tmp = frag_tmp->fr_next;
198 frag_tmp->fr_opcode = frag_opcode;
199 new_broken_words = 0;
201 for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word)
202 a->dispfrag = frag_tmp;
204 #endif /* WORKING_DOT_WORD */
206 if ((symbolP = symbol_find (sym_name)) != 0)
208 #ifdef RESOLVE_SYMBOL_REDEFINITION
209 if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
213 * Now check for undefined symbols
215 if (!S_IS_DEFINED (symbolP))
217 if (S_GET_VALUE (symbolP) == 0)
219 symbolP->sy_frag = frag_now;
221 S_GET_OTHER(symbolP) = const_flag;
223 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
224 S_SET_SEGMENT (symbolP, now_seg);
227 #endif /* if we have one, it better be zero. */
233 * There are still several cases to check:
234 * A .comm/.lcomm symbol being redefined as
235 * initialized data is OK
236 * A .comm/.lcomm symbol being redefined with
237 * a larger size is also OK
239 * This only used to be allowed on VMS gas, but Sun cc
240 * on the sparc also depends on it.
243 if (((!S_IS_DEBUG (symbolP)
244 && !S_IS_DEFINED (symbolP)
245 && S_IS_EXTERNAL (symbolP))
246 || S_GET_SEGMENT (symbolP) == bss_section)
247 && (now_seg == data_section
248 || now_seg == S_GET_SEGMENT (symbolP)))
251 * Select which of the 2 cases this is
253 if (now_seg != data_section)
256 * New .comm for prev .comm symbol.
257 * If the new size is larger we just
258 * change its value. If the new size
259 * is smaller, we ignore this symbol
261 if (S_GET_VALUE (symbolP)
262 < ((unsigned) frag_now_fix ()))
264 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
269 /* It is a .comm/.lcomm being converted to initialized
271 symbolP->sy_frag = frag_now;
273 S_GET_OTHER(symbolP) = const_flag;
275 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
276 S_SET_SEGMENT (symbolP, now_seg); /* keep N_EXT bit */
281 #if defined (S_GET_OTHER) && defined (S_GET_DESC)
282 as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%ld.",
284 segment_name (S_GET_SEGMENT (symbolP)),
285 S_GET_OTHER (symbolP), S_GET_DESC (symbolP),
286 (long) S_GET_VALUE (symbolP));
288 as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%ld.",
290 segment_name (S_GET_SEGMENT (symbolP)),
291 (long) S_GET_VALUE (symbolP));
294 } /* if the undefined symbol has no value */
298 /* Don't blow up if the definition is the same */
299 if (!(frag_now == symbolP->sy_frag
300 && S_GET_VALUE (symbolP) == frag_now_fix ()
301 && S_GET_SEGMENT (symbolP) == now_seg))
302 as_fatal ("Symbol %s already defined.", sym_name);
303 } /* if this symbol is not yet defined */
308 symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (),
311 S_SET_OTHER (symbolP, const_flag);
314 symbol_table_insert (symbolP);
315 } /* if we have seen this symbol before */
318 tc_frob_label (symbolP);
324 * symbol_table_insert()
326 * Die if we can't insert the symbol.
331 symbol_table_insert (symbolP)
334 register const char *error_string;
337 know (S_GET_NAME (symbolP));
339 if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP)))
341 as_fatal ("Inserting \"%s\" into symbol table failed: %s",
342 S_GET_NAME (symbolP), error_string);
344 } /* symbol_table_insert() */
347 * symbol_find_or_make()
349 * If a symbol name does not exist, create it as undefined, and insert
350 * it into the symbol table. Return a pointer to it.
353 symbol_find_or_make (name)
356 register symbolS *symbolP;
358 symbolP = symbol_find (name);
362 symbolP = symbol_make (name);
364 symbol_table_insert (symbolP);
365 } /* if symbol wasn't found */
368 } /* symbol_find_or_make() */
376 /* Let the machine description default it, e.g. for register names. */
377 symbolP = md_undefined_symbol ((char *) name);
380 symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag);
383 } /* symbol_make() */
388 * Implement symbol table lookup.
389 * In: A symbol's name as a string: '\0' can't be part of a symbol name.
390 * Out: NULL if the name was not in the symbol table, else the address
391 * of a struct symbol associated with that name.
398 #ifdef STRIP_UNDERSCORE
399 return (symbol_find_base (name, 1));
400 #else /* STRIP_UNDERSCORE */
401 return (symbol_find_base (name, 0));
402 #endif /* STRIP_UNDERSCORE */
403 } /* symbol_find() */
406 symbol_find_base (name, strip_underscore)
408 int strip_underscore;
410 if (strip_underscore && *name == '_')
413 #ifdef tc_canonicalize_symbol_name
417 copy = (char *) alloca (strlen (name) + 1);
419 name = tc_canonicalize_symbol_name (copy);
423 return ((symbolS *) hash_find (sy_hash, name));
427 * Once upon a time, symbols were kept in a singly linked list. At
428 * least coff needs to be able to rearrange them from time to time, for
429 * which a doubly linked list is much more convenient. Loic did these
430 * as macros which seemed dangerous to me so they're now functions.
434 /* Link symbol ADDME after symbol TARGET in the chain. */
436 symbol_append (addme, target, rootPP, lastPP)
444 know (*rootPP == NULL);
445 know (*lastPP == NULL);
449 } /* if the list is empty */
451 if (target->sy_next != NULL)
453 #ifdef SYMBOLS_NEED_BACKPOINTERS
454 target->sy_next->sy_previous = addme;
455 #endif /* SYMBOLS_NEED_BACKPOINTERS */
459 know (*lastPP == target);
461 } /* if we have a next */
463 addme->sy_next = target->sy_next;
464 target->sy_next = addme;
466 #ifdef SYMBOLS_NEED_BACKPOINTERS
467 addme->sy_previous = target;
468 #endif /* SYMBOLS_NEED_BACKPOINTERS */
471 /* Set the chain pointers of SYMBOL to null. */
473 symbol_clear_list_pointers (symbolP)
476 symbolP->sy_next = NULL;
477 #ifdef SYMBOLS_NEED_BACKPOINTERS
478 symbolP->sy_previous = NULL;
482 #ifdef SYMBOLS_NEED_BACKPOINTERS
483 /* Remove SYMBOLP from the list. */
485 symbol_remove (symbolP, rootPP, lastPP)
490 if (symbolP == *rootPP)
492 *rootPP = symbolP->sy_next;
493 } /* if it was the root */
495 if (symbolP == *lastPP)
497 *lastPP = symbolP->sy_previous;
498 } /* if it was the tail */
500 if (symbolP->sy_next != NULL)
502 symbolP->sy_next->sy_previous = symbolP->sy_previous;
505 if (symbolP->sy_previous != NULL)
507 symbolP->sy_previous->sy_next = symbolP->sy_next;
510 debug_verify_symchain (*rootPP, *lastPP);
513 /* Link symbol ADDME before symbol TARGET in the chain. */
515 symbol_insert (addme, target, rootPP, lastPP)
521 if (target->sy_previous != NULL)
523 target->sy_previous->sy_next = addme;
527 know (*rootPP == target);
531 addme->sy_previous = target->sy_previous;
532 target->sy_previous = addme;
533 addme->sy_next = target;
535 debug_verify_symchain (*rootPP, *lastPP);
538 #endif /* SYMBOLS_NEED_BACKPOINTERS */
541 verify_symbol_chain (rootP, lastP)
545 symbolS *symbolP = rootP;
550 for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
552 #ifdef SYMBOLS_NEED_BACKPOINTERS
553 know (symbolP->sy_next->sy_previous == symbolP);
555 /* Walk the list anyways, to make sure pointers are still good. */
557 #endif /* SYMBOLS_NEED_BACKPOINTERS */
560 assert (lastP == symbolP);
564 verify_symbol_chain_2 (sym)
567 symbolS *p = sym, *n = sym;
568 #ifdef SYMBOLS_NEED_BACKPOINTERS
569 while (symbol_previous (p))
570 p = symbol_previous (p);
572 while (symbol_next (n))
574 verify_symbol_chain (p, n);
577 /* Resolve the value of a symbol. This is called during the final
578 pass over the symbol table to resolve any symbols with complex
582 resolve_symbol_value (symp)
587 if (symp->sy_resolved)
592 if (symp->sy_resolving)
594 as_bad ("Symbol definition loop encountered at %s",
596 S_SET_VALUE (symp, (valueT) 0);
601 offsetT left, right, val;
602 segT seg_left, seg_right;
604 symp->sy_resolving = 1;
607 switch (symp->sy_value.X_op)
610 S_SET_VALUE (symp, 0);
613 S_SET_VALUE (symp, S_GET_VALUE (symp) + symp->sy_frag->fr_address);
614 if (S_GET_SEGMENT (symp) == expr_section)
615 S_SET_SEGMENT (symp, absolute_section);
620 resolve_symbol_value (symp->sy_value.X_add_symbol);
622 #if 0 /* I thought this was needed for some of the i386-svr4 PIC
623 support, but it appears I was wrong, and it breaks rs6000
625 if (S_GET_SEGMENT (symp->sy_value.X_add_symbol) != undefined_section
626 && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section)
629 if (symp->sy_value.X_add_number == 0)
630 copy_symbol_attributes (symp, symp->sy_value.X_add_symbol);
633 (symp->sy_value.X_add_number
634 + symp->sy_frag->fr_address
635 + S_GET_VALUE (symp->sy_value.X_add_symbol)));
636 if (S_GET_SEGMENT (symp) == expr_section
637 || S_GET_SEGMENT (symp) == undefined_section)
639 S_GET_SEGMENT (symp->sy_value.X_add_symbol));
641 resolved = symp->sy_value.X_add_symbol->sy_resolved;
646 resolve_symbol_value (symp->sy_value.X_add_symbol);
647 if (symp->sy_value.X_op == O_uminus)
648 val = - S_GET_VALUE (symp->sy_value.X_add_symbol);
650 val = ~ S_GET_VALUE (symp->sy_value.X_add_symbol);
653 + symp->sy_value.X_add_number
654 + symp->sy_frag->fr_address));
655 if (S_GET_SEGMENT (symp) == expr_section
656 || S_GET_SEGMENT (symp) == undefined_section)
657 S_SET_SEGMENT (symp, absolute_section);
658 resolved = symp->sy_value.X_add_symbol->sy_resolved;
662 resolve_symbol_value (symp->sy_value.X_add_symbol);
663 resolve_symbol_value (symp->sy_value.X_op_symbol);
664 seg_left = S_GET_SEGMENT (symp->sy_value.X_add_symbol);
665 seg_right = S_GET_SEGMENT (symp->sy_value.X_op_symbol);
666 /* This case comes up with PIC support. */
668 symbolS *s_left = symp->sy_value.X_add_symbol;
669 symbolS *s_right = symp->sy_value.X_op_symbol;
671 if (seg_left == absolute_section)
679 seg_left = seg_right;
682 if (seg_right == absolute_section
683 && s_right->sy_resolved)
685 symp->sy_value.X_add_number += S_GET_VALUE (s_right);
686 symp->sy_value.X_op_symbol = 0;
687 symp->sy_value.X_add_symbol = s_left;
688 symp->sy_value.X_op = O_symbol;
699 case O_bit_inclusive_or:
701 case O_bit_exclusive_or:
704 resolve_symbol_value (symp->sy_value.X_add_symbol);
705 resolve_symbol_value (symp->sy_value.X_op_symbol);
706 seg_left = S_GET_SEGMENT (symp->sy_value.X_add_symbol);
707 seg_right = S_GET_SEGMENT (symp->sy_value.X_op_symbol);
708 if (seg_left != seg_right
709 && seg_left != undefined_section
710 && seg_right != undefined_section)
711 as_bad ("%s is operation on symbols in different sections",
713 if ((S_GET_SEGMENT (symp->sy_value.X_add_symbol)
715 && symp->sy_value.X_op != O_subtract)
716 as_bad ("%s is illegal operation on non-absolute symbols",
718 left = S_GET_VALUE (symp->sy_value.X_add_symbol);
719 right = S_GET_VALUE (symp->sy_value.X_op_symbol);
720 switch (symp->sy_value.X_op)
722 case O_multiply: val = left * right; break;
723 case O_divide: val = left / right; break;
724 case O_modulus: val = left % right; break;
725 case O_left_shift: val = left << right; break;
726 case O_right_shift: val = left >> right; break;
727 case O_bit_inclusive_or: val = left | right; break;
728 case O_bit_or_not: val = left |~ right; break;
729 case O_bit_exclusive_or: val = left ^ right; break;
730 case O_bit_and: val = left & right; break;
731 case O_add: val = left + right; break;
732 case O_subtract: val = left - right; break;
736 (symp->sy_value.X_add_number
737 + symp->sy_frag->fr_address
739 if (S_GET_SEGMENT (symp) == expr_section
740 || S_GET_SEGMENT (symp) == undefined_section)
741 S_SET_SEGMENT (symp, absolute_section);
742 resolved = (symp->sy_value.X_add_symbol->sy_resolved
743 && symp->sy_value.X_op_symbol->sy_resolved);
749 /* Give an error (below) if not in expr_section. We don't
750 want to worry about expr_section symbols, because they
751 are fictional (they are created as part of expression
752 resolution), and any problems may not actually mean
758 /* Don't worry if we can't resolve an expr_section symbol. */
760 symp->sy_resolved = 1;
761 else if (S_GET_SEGMENT (symp) != expr_section)
763 as_bad ("can't resolve value for symbol \"%s\"", S_GET_NAME (symp));
764 symp->sy_resolved = 1;
768 #ifdef LOCAL_LABELS_DOLLAR
770 /* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
771 They are *really* local. That is, they go out of scope whenever we see a
772 label that isn't local. Also, like fb labels, there can be multiple
773 instances of a dollar label. Therefor, we name encode each instance with
774 the instance number, keep a list of defined symbols separate from the real
775 symbol table, and we treat these buggers as a sparse array. */
777 static long *dollar_labels;
778 static long *dollar_label_instances;
779 static char *dollar_label_defines;
780 static long dollar_label_count;
781 static unsigned long dollar_label_max;
784 dollar_label_defined (label)
789 know ((dollar_labels != NULL) || (dollar_label_count == 0));
791 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
793 return dollar_label_defines[i - dollar_labels];
795 /* if we get here, label isn't defined */
797 } /* dollar_label_defined() */
800 dollar_label_instance (label)
805 know ((dollar_labels != NULL) || (dollar_label_count == 0));
807 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
809 return (dollar_label_instances[i - dollar_labels]);
811 /* If we get here, we haven't seen the label before, therefore its instance
817 dollar_label_clear ()
819 memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
822 #define DOLLAR_LABEL_BUMP_BY 10
825 define_dollar_label (label)
830 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
833 ++dollar_label_instances[i - dollar_labels];
834 dollar_label_defines[i - dollar_labels] = 1;
838 /* if we get to here, we don't have label listed yet. */
840 if (dollar_labels == NULL)
842 dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
843 dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
844 dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
845 dollar_label_max = DOLLAR_LABEL_BUMP_BY;
846 dollar_label_count = 0;
848 else if (dollar_label_count == dollar_label_max)
850 dollar_label_max += DOLLAR_LABEL_BUMP_BY;
851 dollar_labels = (long *) xrealloc ((char *) dollar_labels,
852 dollar_label_max * sizeof (long));
853 dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
854 dollar_label_max * sizeof (long));
855 dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
856 } /* if we needed to grow */
858 dollar_labels[dollar_label_count] = label;
859 dollar_label_instances[dollar_label_count] = 1;
860 dollar_label_defines[dollar_label_count] = 1;
861 ++dollar_label_count;
865 * dollar_label_name()
867 * Caller must copy returned name: we re-use the area for the next name.
869 * The mth occurence of label n: is turned into the symbol "Ln^Am"
870 * where n is the label number and m is the instance number. "L" makes
871 * it a label discarded unless debugging and "^A"('\1') ensures no
872 * ordinary symbol SHOULD get the same name as a local label
873 * symbol. The first "4:" is "L4^A1" - the m numbers begin at 1.
875 * fb labels get the same treatment, except that ^B is used in place of ^A.
878 char * /* Return local label name. */
879 dollar_label_name (n, augend)
880 register long n; /* we just saw "n$:" : n a number */
881 register int augend; /* 0 for current instance, 1 for new instance */
884 /* Returned to caller, then copied. used for created names ("4f") */
885 static char symbol_name_build[24];
888 char symbol_name_temporary[20]; /* build up a number, BACKWARDS */
891 know (augend == 0 || augend == 1);
892 p = symbol_name_build;
895 /* Next code just does sprintf( {}, "%d", n); */
897 q = symbol_name_temporary;
898 for (*q++ = 0, i = n; i; ++q)
903 while ((*p = *--q) != '\0')
908 /* instance number */
909 q = symbol_name_temporary;
910 for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q)
915 while ((*p++ = *--q) != '\0');;
917 /* The label, as a '\0' ended string, starts at symbol_name_build. */
918 return symbol_name_build;
921 #endif /* LOCAL_LABELS_DOLLAR */
923 #ifdef LOCAL_LABELS_FB
926 * Sombody else's idea of local labels. They are made by "n:" where n
927 * is any decimal digit. Refer to them with
928 * "nb" for previous (backward) n:
929 * or "nf" for next (forward) n:.
931 * We do a little better and let n be any number, not just a single digit, but
932 * since the other guy's assembler only does ten, we treat the first ten
935 * Like someone else's assembler, we have one set of local label counters for
936 * entire assembly, not one set per (sub)segment like in most assemblers. This
937 * implies that one can refer to a label in another segment, and indeed some
938 * crufty compilers have done just that.
940 * Since there could be a LOT of these things, treat them as a sparse array.
943 #define FB_LABEL_SPECIAL (10)
945 static long fb_low_counter[FB_LABEL_SPECIAL];
946 static long *fb_labels;
947 static long *fb_label_instances;
948 static long fb_label_count;
949 static long fb_label_max;
951 /* this must be more than FB_LABEL_SPECIAL */
952 #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
957 memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
958 } /* fb_label_init() */
960 /* add one to the instance number of this fb label */
962 fb_label_instance_inc (label)
967 if (label < FB_LABEL_SPECIAL)
969 ++fb_low_counter[label];
973 if (fb_labels != NULL)
975 for (i = fb_labels + FB_LABEL_SPECIAL;
976 i < fb_labels + fb_label_count; ++i)
980 ++fb_label_instances[i - fb_labels];
982 } /* if we find it */
983 } /* for each existing label */
986 /* if we get to here, we don't have label listed yet. */
988 if (fb_labels == NULL)
990 fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
991 fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
992 fb_label_max = FB_LABEL_BUMP_BY;
993 fb_label_count = FB_LABEL_SPECIAL;
996 else if (fb_label_count == fb_label_max)
998 fb_label_max += FB_LABEL_BUMP_BY;
999 fb_labels = (long *) xrealloc ((char *) fb_labels,
1000 fb_label_max * sizeof (long));
1001 fb_label_instances = (long *) xrealloc ((char *) fb_label_instances,
1002 fb_label_max * sizeof (long));
1003 } /* if we needed to grow */
1005 fb_labels[fb_label_count] = label;
1006 fb_label_instances[fb_label_count] = 1;
1011 fb_label_instance (label)
1016 if (label < FB_LABEL_SPECIAL)
1018 return (fb_low_counter[label]);
1021 if (fb_labels != NULL)
1023 for (i = fb_labels + FB_LABEL_SPECIAL;
1024 i < fb_labels + fb_label_count; ++i)
1028 return (fb_label_instances[i - fb_labels]);
1029 } /* if we find it */
1030 } /* for each existing label */
1033 /* We didn't find the label, so this must be a reference to the
1041 * Caller must copy returned name: we re-use the area for the next name.
1043 * The mth occurence of label n: is turned into the symbol "Ln^Bm"
1044 * where n is the label number and m is the instance number. "L" makes
1045 * it a label discarded unless debugging and "^B"('\2') ensures no
1046 * ordinary symbol SHOULD get the same name as a local label
1047 * symbol. The first "4:" is "L4^B1" - the m numbers begin at 1.
1049 * dollar labels get the same treatment, except that ^A is used in place of ^B. */
1051 char * /* Return local label name. */
1052 fb_label_name (n, augend)
1053 long n; /* we just saw "n:", "nf" or "nb" : n a number */
1054 long augend; /* 0 for nb, 1 for n:, nf */
1057 /* Returned to caller, then copied. used for created names ("4f") */
1058 static char symbol_name_build[24];
1061 char symbol_name_temporary[20]; /* build up a number, BACKWARDS */
1064 know (augend == 0 || augend == 1);
1065 p = symbol_name_build;
1068 /* Next code just does sprintf( {}, "%d", n); */
1070 q = symbol_name_temporary;
1071 for (*q++ = 0, i = n; i; ++q)
1076 while ((*p = *--q) != '\0')
1081 /* instance number */
1082 q = symbol_name_temporary;
1083 for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q)
1088 while ((*p++ = *--q) != '\0');;
1090 /* The label, as a '\0' ended string, starts at symbol_name_build. */
1091 return (symbol_name_build);
1092 } /* fb_label_name() */
1094 #endif /* LOCAL_LABELS_FB */
1098 * decode name that may have been generated by foo_label_name() above. If
1099 * the name wasn't generated by foo_label_name(), then return it unaltered.
1100 * This is used for error messages.
1104 decode_local_label_name (s)
1108 char *symbol_decode;
1110 int instance_number;
1112 const char *message_format = "\"%d\" (instance number %d of a %s label)";
1117 for (label_number = 0, p = s + 1; isdigit (*p); ++p)
1119 label_number = (10 * label_number) + *p - '0';
1135 for (instance_number = 0, p = s + 1; isdigit (*p); ++p)
1137 instance_number = (10 * instance_number) + *p - '0';
1140 symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30);
1141 (void) sprintf (symbol_decode, message_format, label_number,
1142 instance_number, type);
1144 return (symbol_decode);
1145 } /* decode_local_label_name() */
1147 /* Get the value of a symbol. */
1153 if (!s->sy_resolved && !s->sy_resolving && s->sy_value.X_op != O_constant)
1154 resolve_symbol_value (s);
1155 if (s->sy_value.X_op != O_constant)
1156 as_bad ("Attempt to get value of unresolved symbol %s", S_GET_NAME (s));
1157 return (valueT) s->sy_value.X_add_number;
1160 /* Set the value of a symbol. */
1163 S_SET_VALUE (s, val)
1167 s->sy_value.X_op = O_constant;
1168 s->sy_value.X_add_number = (offsetT) val;
1169 s->sy_value.X_unsigned = 0;
1173 copy_symbol_attributes (dest, src)
1174 symbolS *dest, *src;
1176 #ifdef BFD_ASSEMBLER
1177 /* In an expression, transfer the settings of these flags.
1178 The user can override later, of course. */
1179 #define COPIED_SYMFLAGS (BSF_FUNCTION)
1180 dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
1183 #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
1184 OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
1188 #ifdef BFD_ASSEMBLER
1194 flagword flags = s->bsym->flags;
1197 if (flags & BSF_LOCAL && flags & BSF_GLOBAL)
1200 return (flags & BSF_GLOBAL) != 0;
1207 return bfd_is_com_section (s->bsym->section);
1214 return s->bsym->section != undefined_section;
1221 if (s->bsym->flags & BSF_DEBUGGING)
1230 flagword flags = s->bsym->flags;
1233 if (flags & BSF_LOCAL && flags & BSF_GLOBAL)
1236 return (S_GET_NAME (s)
1238 && (strchr (S_GET_NAME (s), '\001')
1239 || strchr (S_GET_NAME (s), '\002')
1240 || (S_LOCAL_NAME (s)
1241 && !flag_keep_locals)));
1248 return S_IS_EXTERNAL (s);
1255 return S_GET_NAME (s) == 0;
1262 return s->bsym->name;
1269 return s->bsym->section;
1273 S_SET_SEGMENT (s, seg)
1277 s->bsym->section = seg;
1284 s->bsym->flags |= BSF_GLOBAL;
1285 s->bsym->flags &= ~(BSF_LOCAL|BSF_WEAK);
1289 S_CLEAR_EXTERNAL (s)
1292 s->bsym->flags |= BSF_LOCAL;
1293 s->bsym->flags &= ~(BSF_GLOBAL|BSF_WEAK);
1300 s->bsym->flags |= BSF_WEAK;
1301 s->bsym->flags &= ~(BSF_GLOBAL|BSF_LOCAL);
1305 S_SET_NAME (s, name)
1309 s->bsym->name = name;
1311 #endif /* BFD_ASSEMBLER */
1316 symbol_lastP = NULL;
1317 symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
1318 sy_hash = hash_new ();
1320 memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
1321 #ifdef BFD_ASSEMBLER
1322 #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL)
1323 abs_symbol.bsym = bfd_abs_section.symbol;
1326 /* Can't initialise a union. Sigh. */
1327 S_SET_SEGMENT (&abs_symbol, absolute_section);
1329 abs_symbol.sy_value.X_op = O_constant;
1331 #ifdef LOCAL_LABELS_FB
1333 #endif /* LOCAL_LABELS_FB */
1342 printf ("%*s", indent_level * 4, "");
1345 void print_expr_1 PARAMS ((FILE *, expressionS *));
1346 void print_symbol_value_1 PARAMS ((FILE *, symbolS *));
1349 print_symbol_value_1 (file, sym)
1353 const char *name = S_GET_NAME (sym);
1354 if (!name || !name[0])
1356 fprintf (file, "sym %lx %s", sym, name);
1357 if (sym->sy_frag != &zero_address_frag)
1358 fprintf (file, " frag %lx", (long) sym->sy_frag);
1360 fprintf (file, " written");
1361 if (sym->sy_resolved)
1362 fprintf (file, " resolved");
1363 else if (sym->sy_resolving)
1364 fprintf (file, " resolving");
1365 if (sym->sy_used_in_reloc)
1366 fprintf (file, " used-in-reloc");
1368 fprintf (file, " used");
1369 if (S_IS_LOCAL (sym))
1370 fprintf (file, " local");
1371 if (S_IS_EXTERN (sym))
1372 fprintf (file, " extern");
1373 if (S_IS_DEBUG (sym))
1374 fprintf (file, " debug");
1375 if (S_IS_DEFINED (sym))
1376 fprintf (file, " defined");
1377 fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym)));
1378 if (sym->sy_resolved)
1380 segT s = S_GET_SEGMENT (sym);
1382 if (s != undefined_section
1383 && s != expr_section)
1384 fprintf (file, " %lx", (long) S_GET_VALUE (sym));
1386 else if (indent_level < 8 && S_GET_SEGMENT (sym) != undefined_section)
1389 fprintf (file, "\n%*s<", indent_level * 4, "");
1390 print_expr_1 (file, &sym->sy_value);
1391 fprintf (file, ">");
1398 print_symbol_value (sym)
1402 print_symbol_value_1 (stderr, sym);
1403 fprintf (stderr, "\n");
1407 print_expr_1 (file, exp)
1411 fprintf (file, "expr %lx ", (long) exp);
1415 fprintf (file, "illegal");
1418 fprintf (file, "absent");
1421 fprintf (file, "constant %lx", (long) exp->X_add_number);
1425 fprintf (file, "symbol\n%*s<", indent_level * 4, "");
1426 print_symbol_value_1 (file, exp->X_add_symbol);
1427 fprintf (file, ">");
1429 if (exp->X_add_number)
1430 fprintf (file, "\n%*s%lx", indent_level * 4, "",
1431 (long) exp->X_add_number);
1435 fprintf (file, "register #%d", (int) exp->X_add_number);
1438 fprintf (file, "big");
1441 fprintf (file, "uminus -<");
1443 print_symbol_value_1 (file, exp->X_add_symbol);
1444 fprintf (file, ">");
1445 goto maybe_print_addnum;
1447 fprintf (file, "bit_not");
1450 fprintf (file, "multiply");
1453 fprintf (file, "divide");
1456 fprintf (file, "modulus");
1459 fprintf (file, "lshift");
1462 fprintf (file, "rshift");
1464 case O_bit_inclusive_or:
1465 fprintf (file, "bit_ior");
1467 case O_bit_exclusive_or:
1468 fprintf (file, "bit_xor");
1471 fprintf (file, "bit_and");
1475 fprintf (file, "add\n%*s<", indent_level * 4, "");
1476 print_symbol_value_1 (file, exp->X_add_symbol);
1477 fprintf (file, ">\n%*s<", indent_level * 4, "");
1478 print_symbol_value_1 (file, exp->X_op_symbol);
1479 fprintf (file, ">");
1480 goto maybe_print_addnum;
1483 fprintf (file, "subtract\n%*s<", indent_level * 4, "");
1484 print_symbol_value_1 (file, exp->X_add_symbol);
1485 fprintf (file, ">\n%*s<", indent_level * 4, "");
1486 print_symbol_value_1 (file, exp->X_op_symbol);
1487 fprintf (file, ">");
1488 goto maybe_print_addnum;
1490 fprintf (file, "{unknown opcode %d}", (int) exp->X_op);
1500 print_expr_1 (stderr, exp);
1501 fprintf (stderr, "\n");
1504 /* end of symbols.c */