1 /* symbols.c -symbol table-
2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 /* #define DEBUG_SYMS / * to debug symbol list maintenance. */
27 #include "safe-ctype.h"
28 #include "obstack.h" /* For "symbols.h" */
31 #include "struc-symbol.h"
33 /* This is non-zero if symbols are case sensitive, which is the
35 int symbols_case_sensitive = 1;
37 #ifndef WORKING_DOT_WORD
38 extern int new_broken_words;
41 /* symbol-name => struct symbol pointer */
42 static struct hash_control *sy_hash;
44 /* Table of local symbols. */
45 static struct hash_control *local_hash;
47 /* Below are commented in "symbols.h". */
48 symbolS *symbol_rootP;
49 symbolS *symbol_lastP;
53 #define debug_verify_symchain verify_symbol_chain
55 #define debug_verify_symchain(root, last) ((void) 0)
58 #define DOLLAR_LABEL_CHAR '\001'
59 #define LOCAL_LABEL_CHAR '\002'
63 static char *save_symbol_name PARAMS ((const char *));
64 static void fb_label_init PARAMS ((void));
65 static long dollar_label_instance PARAMS ((long));
66 static long fb_label_instance PARAMS ((long));
68 static void print_binary PARAMS ((FILE *, const char *, expressionS *));
70 /* Return a pointer to a new symbol. Die if we can't make a new
71 symbol. Fill in the symbol's values. Add symbol to end of symbol
74 This function should be called in the general case of creating a
75 symbol. However, if the output file symbol table has already been
76 set, and you are certain that this symbol won't be wanted in the
77 output file, you can call symbol_create. */
80 symbol_new (name, segment, valu, frag)
86 symbolS *symbolP = symbol_create (name, segment, valu, frag);
88 /* Link to end of symbol chain. */
91 extern int symbol_table_frozen;
92 if (symbol_table_frozen)
96 symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
101 /* Save a symbol name on a permanent obstack, and convert it according
102 to the object file format. */
105 save_symbol_name (name)
108 unsigned int name_length;
111 name_length = strlen (name) + 1; /* +1 for \0. */
112 obstack_grow (¬es, name, name_length);
113 ret = obstack_finish (¬es);
115 #ifdef STRIP_UNDERSCORE
120 #ifdef tc_canonicalize_symbol_name
121 ret = tc_canonicalize_symbol_name (ret);
124 if (! symbols_case_sensitive)
128 for (s = ret; *s != '\0'; s++)
136 symbol_create (name, segment, valu, frag)
137 const char *name; /* It is copied, the caller can destroy/modify. */
138 segT segment; /* Segment identifier (SEG_<something>). */
139 valueT valu; /* Symbol value. */
140 fragS *frag; /* Associated fragment. */
142 char *preserved_copy_of_name;
145 preserved_copy_of_name = save_symbol_name (name);
147 symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS));
149 /* symbol must be born in some fixed state. This seems as good as any. */
150 memset (symbolP, 0, sizeof (symbolS));
153 symbolP->bsym = bfd_make_empty_symbol (stdoutput);
154 if (symbolP->bsym == NULL)
155 as_perror ("%s", "bfd_make_empty_symbol");
156 symbolP->bsym->udata.p = (PTR) symbolP;
158 S_SET_NAME (symbolP, preserved_copy_of_name);
160 S_SET_SEGMENT (symbolP, segment);
161 S_SET_VALUE (symbolP, valu);
162 symbol_clear_list_pointers (symbolP);
164 symbolP->sy_frag = frag;
165 #ifndef BFD_ASSEMBLER
166 symbolP->sy_number = ~0;
167 symbolP->sy_name_offset = (unsigned int) ~0;
170 obj_symbol_new_hook (symbolP);
172 #ifdef tc_symbol_new_hook
173 tc_symbol_new_hook (symbolP);
181 /* Local symbol support. If we can get away with it, we keep only a
182 small amount of information for local symbols. */
184 static struct local_symbol *local_symbol_make PARAMS ((const char *, segT,
186 static symbolS *local_symbol_convert PARAMS ((struct local_symbol *));
188 /* Used for statistics. */
190 static unsigned long local_symbol_count;
191 static unsigned long local_symbol_conversion_count;
193 /* This macro is called with a symbol argument passed by reference.
194 It returns whether this is a local symbol. If necessary, it
195 changes its argument to the real symbol. */
197 #define LOCAL_SYMBOL_CHECK(s) \
199 ? (local_symbol_converted_p ((struct local_symbol *) s) \
200 ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \
205 /* Create a local symbol and insert it into the local hash table. */
207 static struct local_symbol *
208 local_symbol_make (name, section, value, frag)
215 struct local_symbol *ret;
217 ++local_symbol_count;
219 name_copy = save_symbol_name (name);
221 ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret);
222 ret->lsy_marker = NULL;
223 ret->lsy_name = name_copy;
224 ret->lsy_section = section;
225 local_symbol_set_frag (ret, frag);
226 ret->lsy_value = value;
228 hash_jam (local_hash, name_copy, (PTR) ret);
233 /* Convert a local symbol into a real symbol. Note that we do not
234 reclaim the space used by the local symbol. */
237 local_symbol_convert (locsym)
238 struct local_symbol *locsym;
242 assert (locsym->lsy_marker == NULL);
243 if (local_symbol_converted_p (locsym))
244 return local_symbol_get_real_symbol (locsym);
246 ++local_symbol_conversion_count;
248 ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value,
249 local_symbol_get_frag (locsym));
251 if (local_symbol_resolved_p (locsym))
252 ret->sy_resolved = 1;
254 /* Local symbols are always either defined or used. */
257 #ifdef TC_LOCAL_SYMFIELD_CONVERT
258 TC_LOCAL_SYMFIELD_CONVERT (locsym, ret);
261 symbol_table_insert (ret);
263 local_symbol_mark_converted (locsym);
264 local_symbol_set_real_symbol (locsym, ret);
266 hash_jam (local_hash, locsym->lsy_name, NULL);
271 #else /* ! BFD_ASSEMBLER */
273 #define LOCAL_SYMBOL_CHECK(s) 0
274 #define local_symbol_convert(s) ((symbolS *) s)
276 #endif /* ! BFD_ASSEMBLER */
278 /* We have just seen "<name>:".
279 Creates a struct symbol unless it already exists.
281 Gripes if we are redefining a symbol incompatibly (and ignores it). */
284 colon (sym_name) /* Just seen "x:" - rattle symbols & frags. */
285 const char *sym_name; /* Symbol name, as a cannonical string. */
286 /* We copy this string: OK to alter later. */
288 register symbolS *symbolP; /* Symbol we are working with. */
290 /* Sun local labels go out of scope whenever a non-local symbol is
292 if (LOCAL_LABELS_DOLLAR)
297 local = bfd_is_local_label_name (stdoutput, sym_name);
299 local = LOCAL_LABEL (sym_name);
303 dollar_label_clear ();
306 #ifndef WORKING_DOT_WORD
307 if (new_broken_words)
309 struct broken_word *a;
314 extern const int md_short_jump_size;
315 extern const int md_long_jump_size;
316 possible_bytes = (md_short_jump_size
317 + new_broken_words * md_long_jump_size);
320 frag_opcode = frag_var (rs_broken_word,
324 (symbolS *) broken_words,
328 /* We want to store the pointer to where to insert the jump
329 table in the fr_opcode of the rs_broken_word frag. This
330 requires a little hackery. */
332 && (frag_tmp->fr_type != rs_broken_word
333 || frag_tmp->fr_opcode))
334 frag_tmp = frag_tmp->fr_next;
336 frag_tmp->fr_opcode = frag_opcode;
337 new_broken_words = 0;
339 for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word)
340 a->dispfrag = frag_tmp;
342 #endif /* WORKING_DOT_WORD */
344 if ((symbolP = symbol_find (sym_name)) != 0)
346 #ifdef RESOLVE_SYMBOL_REDEFINITION
347 if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
350 /* Now check for undefined symbols. */
351 if (LOCAL_SYMBOL_CHECK (symbolP))
354 struct local_symbol *locsym = (struct local_symbol *) symbolP;
356 if (locsym->lsy_section != undefined_section
357 && (local_symbol_get_frag (locsym) != frag_now
358 || locsym->lsy_section != now_seg
359 || locsym->lsy_value != frag_now_fix ()))
361 as_bad (_("symbol `%s' is already defined"), sym_name);
365 locsym->lsy_section = now_seg;
366 local_symbol_set_frag (locsym, frag_now);
367 locsym->lsy_value = frag_now_fix ();
370 else if (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP))
372 if (S_GET_VALUE (symbolP) == 0)
374 symbolP->sy_frag = frag_now;
376 S_SET_OTHER (symbolP, const_flag);
378 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
379 S_SET_SEGMENT (symbolP, now_seg);
382 #endif /* if we have one, it better be zero. */
387 /* There are still several cases to check:
389 A .comm/.lcomm symbol being redefined as initialized
392 A .comm/.lcomm symbol being redefined with a larger
395 This only used to be allowed on VMS gas, but Sun cc
396 on the sparc also depends on it. */
398 if (((!S_IS_DEBUG (symbolP)
399 && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP))
400 && S_IS_EXTERNAL (symbolP))
401 || S_GET_SEGMENT (symbolP) == bss_section)
402 && (now_seg == data_section
403 || now_seg == S_GET_SEGMENT (symbolP)))
405 /* Select which of the 2 cases this is. */
406 if (now_seg != data_section)
408 /* New .comm for prev .comm symbol.
410 If the new size is larger we just change its
411 value. If the new size is smaller, we ignore
413 if (S_GET_VALUE (symbolP)
414 < ((unsigned) frag_now_fix ()))
416 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
421 /* It is a .comm/.lcomm being converted to initialized
423 symbolP->sy_frag = frag_now;
425 S_SET_OTHER (symbolP, const_flag);
427 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
428 S_SET_SEGMENT (symbolP, now_seg); /* Keep N_EXT bit. */
433 #if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \
434 && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT))
435 static const char *od_buf = "";
440 if (OUTPUT_FLAVOR == bfd_target_aout_flavour)
442 sprintf(od_buf, "%d.%d.",
443 S_GET_OTHER (symbolP),
444 S_GET_DESC (symbolP));
446 as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"),
448 segment_name (S_GET_SEGMENT (symbolP)),
450 (long) S_GET_VALUE (symbolP));
452 } /* if the undefined symbol has no value */
456 /* Don't blow up if the definition is the same. */
457 if (!(frag_now == symbolP->sy_frag
458 && S_GET_VALUE (symbolP) == frag_now_fix ()
459 && S_GET_SEGMENT (symbolP) == now_seg))
460 as_bad (_("symbol `%s' is already defined"), sym_name);
465 else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name))
467 symbolP = (symbolS *) local_symbol_make (sym_name, now_seg,
468 (valueT) frag_now_fix (),
471 #endif /* BFD_ASSEMBLER */
474 symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (),
477 S_SET_OTHER (symbolP, const_flag);
480 symbol_table_insert (symbolP);
483 if (mri_common_symbol != NULL)
485 /* This symbol is actually being defined within an MRI common
486 section. This requires special handling. */
487 if (LOCAL_SYMBOL_CHECK (symbolP))
488 symbolP = local_symbol_convert ((struct local_symbol *) symbolP);
489 symbolP->sy_value.X_op = O_symbol;
490 symbolP->sy_value.X_add_symbol = mri_common_symbol;
491 symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol);
492 symbolP->sy_frag = &zero_address_frag;
493 S_SET_SEGMENT (symbolP, expr_section);
494 symbolP->sy_mri_common = 1;
498 tc_frob_label (symbolP);
500 #ifdef obj_frob_label
501 obj_frob_label (symbolP);
507 /* Die if we can't insert the symbol. */
510 symbol_table_insert (symbolP)
513 register const char *error_string;
516 know (S_GET_NAME (symbolP));
518 if (LOCAL_SYMBOL_CHECK (symbolP))
520 error_string = hash_jam (local_hash, S_GET_NAME (symbolP),
522 if (error_string != NULL)
523 as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
524 S_GET_NAME (symbolP), error_string);
528 if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP)))
530 as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
531 S_GET_NAME (symbolP), error_string);
535 /* If a symbol name does not exist, create it as undefined, and insert
536 it into the symbol table. Return a pointer to it. */
539 symbol_find_or_make (name)
542 register symbolS *symbolP;
544 symbolP = symbol_find (name);
549 if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name))
551 symbolP = md_undefined_symbol ((char *) name);
555 symbolP = (symbolS *) local_symbol_make (name, undefined_section,
562 symbolP = symbol_make (name);
564 symbol_table_insert (symbolP);
565 } /* if symbol wasn't found */
576 /* Let the machine description default it, e.g. for register names. */
577 symbolP = md_undefined_symbol ((char *) name);
580 symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag);
585 /* Implement symbol table lookup.
586 In: A symbol's name as a string: '\0' can't be part of a symbol name.
587 Out: NULL if the name was not in the symbol table, else the address
588 of a struct symbol associated with that name. */
594 #ifdef STRIP_UNDERSCORE
595 return (symbol_find_base (name, 1));
596 #else /* STRIP_UNDERSCORE */
597 return (symbol_find_base (name, 0));
598 #endif /* STRIP_UNDERSCORE */
602 symbol_find_base (name, strip_underscore)
604 int strip_underscore;
606 if (strip_underscore && *name == '_')
609 #ifdef tc_canonicalize_symbol_name
612 size_t len = strlen (name) + 1;
614 copy = (char *) alloca (len);
615 memcpy (copy, name, len);
616 name = tc_canonicalize_symbol_name (copy);
620 if (! symbols_case_sensitive)
627 name = copy = (char *) alloca (strlen (name) + 1);
629 while ((c = *orig++) != '\0')
631 *copy++ = TOUPPER (c);
638 struct local_symbol *locsym;
640 locsym = (struct local_symbol *) hash_find (local_hash, name);
642 return (symbolS *) locsym;
646 return ((symbolS *) hash_find (sy_hash, name));
649 /* Once upon a time, symbols were kept in a singly linked list. At
650 least coff needs to be able to rearrange them from time to time, for
651 which a doubly linked list is much more convenient. Loic did these
652 as macros which seemed dangerous to me so they're now functions.
655 /* Link symbol ADDME after symbol TARGET in the chain. */
658 symbol_append (addme, target, rootPP, lastPP)
664 if (LOCAL_SYMBOL_CHECK (addme))
666 if (target != NULL && LOCAL_SYMBOL_CHECK (target))
671 know (*rootPP == NULL);
672 know (*lastPP == NULL);
673 addme->sy_next = NULL;
674 #ifdef SYMBOLS_NEED_BACKPOINTERS
675 addme->sy_previous = NULL;
680 } /* if the list is empty */
682 if (target->sy_next != NULL)
684 #ifdef SYMBOLS_NEED_BACKPOINTERS
685 target->sy_next->sy_previous = addme;
686 #endif /* SYMBOLS_NEED_BACKPOINTERS */
690 know (*lastPP == target);
692 } /* if we have a next */
694 addme->sy_next = target->sy_next;
695 target->sy_next = addme;
697 #ifdef SYMBOLS_NEED_BACKPOINTERS
698 addme->sy_previous = target;
699 #endif /* SYMBOLS_NEED_BACKPOINTERS */
701 debug_verify_symchain (symbol_rootP, symbol_lastP);
704 /* Set the chain pointers of SYMBOL to null. */
707 symbol_clear_list_pointers (symbolP)
710 if (LOCAL_SYMBOL_CHECK (symbolP))
712 symbolP->sy_next = NULL;
713 #ifdef SYMBOLS_NEED_BACKPOINTERS
714 symbolP->sy_previous = NULL;
718 #ifdef SYMBOLS_NEED_BACKPOINTERS
719 /* Remove SYMBOLP from the list. */
722 symbol_remove (symbolP, rootPP, lastPP)
727 if (LOCAL_SYMBOL_CHECK (symbolP))
730 if (symbolP == *rootPP)
732 *rootPP = symbolP->sy_next;
733 } /* if it was the root */
735 if (symbolP == *lastPP)
737 *lastPP = symbolP->sy_previous;
738 } /* if it was the tail */
740 if (symbolP->sy_next != NULL)
742 symbolP->sy_next->sy_previous = symbolP->sy_previous;
745 if (symbolP->sy_previous != NULL)
747 symbolP->sy_previous->sy_next = symbolP->sy_next;
750 debug_verify_symchain (*rootPP, *lastPP);
753 /* Link symbol ADDME before symbol TARGET in the chain. */
756 symbol_insert (addme, target, rootPP, lastPP)
760 symbolS **lastPP ATTRIBUTE_UNUSED;
762 if (LOCAL_SYMBOL_CHECK (addme))
764 if (LOCAL_SYMBOL_CHECK (target))
767 if (target->sy_previous != NULL)
769 target->sy_previous->sy_next = addme;
773 know (*rootPP == target);
777 addme->sy_previous = target->sy_previous;
778 target->sy_previous = addme;
779 addme->sy_next = target;
781 debug_verify_symchain (*rootPP, *lastPP);
784 #endif /* SYMBOLS_NEED_BACKPOINTERS */
787 verify_symbol_chain (rootP, lastP)
791 symbolS *symbolP = rootP;
796 for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
799 assert (symbolP->bsym != NULL);
801 #ifdef SYMBOLS_NEED_BACKPOINTERS
802 assert (symbolP->sy_next->sy_previous == symbolP);
804 /* Walk the list anyways, to make sure pointers are still good. */
806 #endif /* SYMBOLS_NEED_BACKPOINTERS */
809 assert (lastP == symbolP);
813 verify_symbol_chain_2 (sym)
816 symbolS *p = sym, *n = sym;
817 #ifdef SYMBOLS_NEED_BACKPOINTERS
818 while (symbol_previous (p))
819 p = symbol_previous (p);
821 while (symbol_next (n))
823 verify_symbol_chain (p, n);
826 /* Resolve the value of a symbol. This is called during the final
827 pass over the symbol table to resolve any symbols with complex
831 resolve_symbol_value (symp)
839 if (LOCAL_SYMBOL_CHECK (symp))
841 struct local_symbol *locsym = (struct local_symbol *) symp;
843 final_val = locsym->lsy_value;
844 if (local_symbol_resolved_p (locsym))
847 final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE;
851 locsym->lsy_value = final_val;
852 local_symbol_mark_resolved (locsym);
859 if (symp->sy_resolved)
861 if (symp->sy_value.X_op == O_constant)
862 return (valueT) symp->sy_value.X_add_number;
868 final_seg = S_GET_SEGMENT (symp);
870 if (symp->sy_resolving)
873 as_bad (_("symbol definition loop encountered at `%s'"),
880 symbolS *add_symbol, *op_symbol;
882 segT seg_left, seg_right;
885 symp->sy_resolving = 1;
887 /* Help out with CSE. */
888 add_symbol = symp->sy_value.X_add_symbol;
889 op_symbol = symp->sy_value.X_op_symbol;
890 final_val = symp->sy_value.X_add_number;
891 op = symp->sy_value.X_op;
904 final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
905 if (final_seg == expr_section)
906 final_seg = absolute_section;
912 left = resolve_symbol_value (add_symbol);
913 seg_left = S_GET_SEGMENT (add_symbol);
915 symp->sy_value.X_op_symbol = NULL;
918 if (symp->sy_mri_common)
920 /* This is a symbol inside an MRI common section. The
921 relocation routines are going to handle it specially.
922 Don't change the value. */
923 resolved = symbol_resolved_p (add_symbol);
927 if (finalize_syms && final_val == 0)
929 if (LOCAL_SYMBOL_CHECK (add_symbol))
930 add_symbol = local_symbol_convert ((struct local_symbol *)
932 copy_symbol_attributes (symp, add_symbol);
935 /* If we have equated this symbol to an undefined or common
936 symbol, keep X_op set to O_symbol, and don't change
937 X_add_number. This permits the routine which writes out
938 relocation to detect this case, and convert the
939 relocation to be against the symbol to which this symbol
941 if (! S_IS_DEFINED (add_symbol) || S_IS_COMMON (add_symbol))
945 symp->sy_value.X_op = O_symbol;
946 symp->sy_value.X_add_symbol = add_symbol;
947 symp->sy_value.X_add_number = final_val;
948 /* Use X_op_symbol as a flag. */
949 symp->sy_value.X_op_symbol = add_symbol;
950 final_seg = seg_left;
953 resolved = symbol_resolved_p (add_symbol);
954 symp->sy_resolving = 0;
955 goto exit_dont_set_value;
957 else if (finalize_syms && final_seg == expr_section
958 && seg_left != expr_section)
960 /* If the symbol is an expression symbol, do similarly
961 as for undefined and common syms above. Handles
962 "sym +/- expr" where "expr" cannot be evaluated
963 immediately, and we want relocations to be against
964 "sym", eg. because it is weak. */
965 symp->sy_value.X_op = O_symbol;
966 symp->sy_value.X_add_symbol = add_symbol;
967 symp->sy_value.X_add_number = final_val;
968 symp->sy_value.X_op_symbol = add_symbol;
969 final_seg = seg_left;
970 final_val += symp->sy_frag->fr_address + left;
971 resolved = symbol_resolved_p (add_symbol);
972 symp->sy_resolving = 0;
973 goto exit_dont_set_value;
977 final_val += symp->sy_frag->fr_address + left;
978 if (final_seg == expr_section || final_seg == undefined_section)
979 final_seg = seg_left;
982 resolved = symbol_resolved_p (add_symbol);
988 left = resolve_symbol_value (add_symbol);
992 else if (op == O_logical_not)
997 final_val += left + symp->sy_frag->fr_address;
998 if (final_seg == expr_section || final_seg == undefined_section)
999 final_seg = absolute_section;
1001 resolved = symbol_resolved_p (add_symbol);
1009 case O_bit_inclusive_or:
1011 case O_bit_exclusive_or:
1023 left = resolve_symbol_value (add_symbol);
1024 right = resolve_symbol_value (op_symbol);
1025 seg_left = S_GET_SEGMENT (add_symbol);
1026 seg_right = S_GET_SEGMENT (op_symbol);
1028 /* Simplify addition or subtraction of a constant by folding the
1029 constant into X_add_number. */
1032 if (seg_right == absolute_section)
1037 else if (seg_left == absolute_section)
1040 add_symbol = op_symbol;
1042 seg_left = seg_right;
1046 else if (op == O_subtract)
1048 if (seg_right == absolute_section)
1055 /* Equality and non-equality tests are permitted on anything.
1056 Subtraction, and other comparison operators are permitted if
1057 both operands are in the same section. Otherwise, both
1058 operands must be absolute. We already handled the case of
1059 addition or subtraction of a constant above. This will
1060 probably need to be changed for an object file format which
1061 supports arbitrary expressions, such as IEEE-695.
1063 Don't emit messages unless we're finalizing the symbol value,
1064 otherwise we may get the same message multiple times. */
1065 if (op != O_eq && op != O_ne
1066 && (seg_left != absolute_section
1067 || seg_right != absolute_section)
1068 && ((op != O_subtract
1069 && op != O_lt && op != O_le && op != O_ge && op != O_gt)
1070 || seg_left != seg_right
1071 || (seg_left == undefined_section
1072 && add_symbol != op_symbol))
1078 if (expr_symbol_where (symp, &file, &line))
1080 if (seg_left == undefined_section)
1081 as_bad_where (file, line,
1082 _("undefined symbol `%s' in operation"),
1083 S_GET_NAME (symp->sy_value.X_add_symbol));
1084 if (seg_right == undefined_section)
1085 as_bad_where (file, line,
1086 _("undefined symbol `%s' in operation"),
1087 S_GET_NAME (symp->sy_value.X_op_symbol));
1088 if (seg_left != undefined_section
1089 && seg_right != undefined_section)
1090 as_bad_where (file, line,
1091 _("invalid section for operation"));
1095 if (seg_left == undefined_section)
1096 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
1097 S_GET_NAME (symp->sy_value.X_add_symbol),
1099 if (seg_right == undefined_section)
1100 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
1101 S_GET_NAME (symp->sy_value.X_op_symbol),
1103 if (seg_left != undefined_section
1104 && seg_right != undefined_section)
1105 as_bad (_("invalid section for operation setting `%s'"),
1110 /* Check for division by zero. */
1111 if ((op == O_divide || op == O_modulus) && right == 0)
1113 /* If seg_right is not absolute_section, then we've
1114 already issued a warning about using a bad symbol. */
1115 if (seg_right == absolute_section && finalize_syms)
1120 if (expr_symbol_where (symp, &file, &line))
1121 as_bad_where (file, line, _("division by zero"));
1123 as_bad (_("division by zero when setting `%s'"),
1130 switch (symp->sy_value.X_op)
1132 case O_multiply: left *= right; break;
1133 case O_divide: left /= right; break;
1134 case O_modulus: left %= right; break;
1135 case O_left_shift: left <<= right; break;
1136 case O_right_shift: left >>= right; break;
1137 case O_bit_inclusive_or: left |= right; break;
1138 case O_bit_or_not: left |= ~right; break;
1139 case O_bit_exclusive_or: left ^= right; break;
1140 case O_bit_and: left &= right; break;
1141 case O_add: left += right; break;
1142 case O_subtract: left -= right; break;
1145 left = (left == right && seg_left == seg_right
1146 && (seg_left != undefined_section
1147 || add_symbol == op_symbol)
1148 ? ~ (offsetT) 0 : 0);
1149 if (symp->sy_value.X_op == O_ne)
1152 case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break;
1153 case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break;
1154 case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break;
1155 case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break;
1156 case O_logical_and: left = left && right; break;
1157 case O_logical_or: left = left || right; break;
1161 final_val += symp->sy_frag->fr_address + left;
1162 if (final_seg == expr_section || final_seg == undefined_section)
1163 final_seg = absolute_section;
1164 resolved = (symbol_resolved_p (add_symbol)
1165 && symbol_resolved_p (op_symbol));
1171 /* Give an error (below) if not in expr_section. We don't
1172 want to worry about expr_section symbols, because they
1173 are fictional (they are created as part of expression
1174 resolution), and any problems may not actually mean
1179 symp->sy_resolving = 0;
1183 S_SET_VALUE (symp, final_val);
1185 exit_dont_set_value:
1186 /* Always set the segment, even if not finalizing the value.
1187 The segment is used to determine whether a symbol is defined. */
1188 #if defined (OBJ_AOUT) && ! defined (BFD_ASSEMBLER)
1189 /* The old a.out backend does not handle S_SET_SEGMENT correctly
1190 for a stab symbol, so we use this bad hack. */
1191 if (final_seg != S_GET_SEGMENT (symp))
1193 S_SET_SEGMENT (symp, final_seg);
1195 /* Don't worry if we can't resolve an expr_section symbol. */
1199 symp->sy_resolved = 1;
1200 else if (S_GET_SEGMENT (symp) != expr_section)
1202 as_bad (_("can't resolve value for symbol `%s'"),
1204 symp->sy_resolved = 1;
1211 #ifdef BFD_ASSEMBLER
1213 static void resolve_local_symbol PARAMS ((const char *, PTR));
1215 /* A static function passed to hash_traverse. */
1218 resolve_local_symbol (key, value)
1219 const char *key ATTRIBUTE_UNUSED;
1223 resolve_symbol_value (value);
1228 /* Resolve all local symbols. */
1231 resolve_local_symbol_values ()
1233 #ifdef BFD_ASSEMBLER
1234 hash_traverse (local_hash, resolve_local_symbol);
1238 /* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
1239 They are *really* local. That is, they go out of scope whenever we see a
1240 label that isn't local. Also, like fb labels, there can be multiple
1241 instances of a dollar label. Therefor, we name encode each instance with
1242 the instance number, keep a list of defined symbols separate from the real
1243 symbol table, and we treat these buggers as a sparse array. */
1245 static long *dollar_labels;
1246 static long *dollar_label_instances;
1247 static char *dollar_label_defines;
1248 static unsigned long dollar_label_count;
1249 static unsigned long dollar_label_max;
1252 dollar_label_defined (label)
1257 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1259 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1261 return dollar_label_defines[i - dollar_labels];
1263 /* If we get here, label isn't defined. */
1268 dollar_label_instance (label)
1273 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1275 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1277 return (dollar_label_instances[i - dollar_labels]);
1279 /* If we get here, we haven't seen the label before.
1280 Therefore its instance count is zero. */
1285 dollar_label_clear ()
1287 memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
1290 #define DOLLAR_LABEL_BUMP_BY 10
1293 define_dollar_label (label)
1298 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1301 ++dollar_label_instances[i - dollar_labels];
1302 dollar_label_defines[i - dollar_labels] = 1;
1306 /* If we get to here, we don't have label listed yet. */
1308 if (dollar_labels == NULL)
1310 dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1311 dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1312 dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
1313 dollar_label_max = DOLLAR_LABEL_BUMP_BY;
1314 dollar_label_count = 0;
1316 else if (dollar_label_count == dollar_label_max)
1318 dollar_label_max += DOLLAR_LABEL_BUMP_BY;
1319 dollar_labels = (long *) xrealloc ((char *) dollar_labels,
1320 dollar_label_max * sizeof (long));
1321 dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
1322 dollar_label_max * sizeof (long));
1323 dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
1324 } /* if we needed to grow */
1326 dollar_labels[dollar_label_count] = label;
1327 dollar_label_instances[dollar_label_count] = 1;
1328 dollar_label_defines[dollar_label_count] = 1;
1329 ++dollar_label_count;
1332 /* Caller must copy returned name: we re-use the area for the next name.
1334 The mth occurence of label n: is turned into the symbol "Ln^Am"
1335 where n is the label number and m is the instance number. "L" makes
1336 it a label discarded unless debugging and "^A"('\1') ensures no
1337 ordinary symbol SHOULD get the same name as a local label
1338 symbol. The first "4:" is "L4^A1" - the m numbers begin at 1.
1340 fb labels get the same treatment, except that ^B is used in place
1343 char * /* Return local label name. */
1344 dollar_label_name (n, augend)
1345 register long n; /* we just saw "n$:" : n a number. */
1346 register int augend; /* 0 for current instance, 1 for new instance. */
1349 /* Returned to caller, then copied. Used for created names ("4f"). */
1350 static char symbol_name_build[24];
1353 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
1356 know (augend == 0 || augend == 1);
1357 p = symbol_name_build;
1358 #ifdef LOCAL_LABEL_PREFIX
1359 *p++ = LOCAL_LABEL_PREFIX;
1363 /* Next code just does sprintf( {}, "%d", n); */
1365 q = symbol_name_temporary;
1366 for (*q++ = 0, i = n; i; ++q)
1371 while ((*p = *--q) != '\0')
1374 *p++ = DOLLAR_LABEL_CHAR; /* ^A */
1376 /* Instance number. */
1377 q = symbol_name_temporary;
1378 for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q)
1383 while ((*p++ = *--q) != '\0');;
1385 /* The label, as a '\0' ended string, starts at symbol_name_build. */
1386 return symbol_name_build;
1389 /* Sombody else's idea of local labels. They are made by "n:" where n
1390 is any decimal digit. Refer to them with
1391 "nb" for previous (backward) n:
1392 or "nf" for next (forward) n:.
1394 We do a little better and let n be any number, not just a single digit, but
1395 since the other guy's assembler only does ten, we treat the first ten
1398 Like someone else's assembler, we have one set of local label counters for
1399 entire assembly, not one set per (sub)segment like in most assemblers. This
1400 implies that one can refer to a label in another segment, and indeed some
1401 crufty compilers have done just that.
1403 Since there could be a LOT of these things, treat them as a sparse
1406 #define FB_LABEL_SPECIAL (10)
1408 static long fb_low_counter[FB_LABEL_SPECIAL];
1409 static long *fb_labels;
1410 static long *fb_label_instances;
1411 static long fb_label_count;
1412 static long fb_label_max;
1414 /* This must be more than FB_LABEL_SPECIAL. */
1415 #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
1420 memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
1423 /* Add one to the instance number of this fb label. */
1426 fb_label_instance_inc (label)
1431 if (label < FB_LABEL_SPECIAL)
1433 ++fb_low_counter[label];
1437 if (fb_labels != NULL)
1439 for (i = fb_labels + FB_LABEL_SPECIAL;
1440 i < fb_labels + fb_label_count; ++i)
1444 ++fb_label_instances[i - fb_labels];
1446 } /* if we find it */
1447 } /* for each existing label */
1450 /* If we get to here, we don't have label listed yet. */
1452 if (fb_labels == NULL)
1454 fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1455 fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1456 fb_label_max = FB_LABEL_BUMP_BY;
1457 fb_label_count = FB_LABEL_SPECIAL;
1460 else if (fb_label_count == fb_label_max)
1462 fb_label_max += FB_LABEL_BUMP_BY;
1463 fb_labels = (long *) xrealloc ((char *) fb_labels,
1464 fb_label_max * sizeof (long));
1465 fb_label_instances = (long *) xrealloc ((char *) fb_label_instances,
1466 fb_label_max * sizeof (long));
1467 } /* if we needed to grow */
1469 fb_labels[fb_label_count] = label;
1470 fb_label_instances[fb_label_count] = 1;
1475 fb_label_instance (label)
1480 if (label < FB_LABEL_SPECIAL)
1482 return (fb_low_counter[label]);
1485 if (fb_labels != NULL)
1487 for (i = fb_labels + FB_LABEL_SPECIAL;
1488 i < fb_labels + fb_label_count; ++i)
1492 return (fb_label_instances[i - fb_labels]);
1493 } /* if we find it */
1494 } /* for each existing label */
1497 /* We didn't find the label, so this must be a reference to the
1502 /* Caller must copy returned name: we re-use the area for the next name.
1504 The mth occurence of label n: is turned into the symbol "Ln^Bm"
1505 where n is the label number and m is the instance number. "L" makes
1506 it a label discarded unless debugging and "^B"('\2') ensures no
1507 ordinary symbol SHOULD get the same name as a local label
1508 symbol. The first "4:" is "L4^B1" - the m numbers begin at 1.
1510 dollar labels get the same treatment, except that ^A is used in
1513 char * /* Return local label name. */
1514 fb_label_name (n, augend)
1515 long n; /* We just saw "n:", "nf" or "nb" : n a number. */
1516 long augend; /* 0 for nb, 1 for n:, nf. */
1519 /* Returned to caller, then copied. Used for created names ("4f"). */
1520 static char symbol_name_build[24];
1523 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
1526 know (augend == 0 || augend == 1);
1527 p = symbol_name_build;
1528 #ifdef LOCAL_LABEL_PREFIX
1529 *p++ = LOCAL_LABEL_PREFIX;
1533 /* Next code just does sprintf( {}, "%d", n); */
1535 q = symbol_name_temporary;
1536 for (*q++ = 0, i = n; i; ++q)
1541 while ((*p = *--q) != '\0')
1544 *p++ = LOCAL_LABEL_CHAR; /* ^B */
1546 /* Instance number. */
1547 q = symbol_name_temporary;
1548 for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q)
1553 while ((*p++ = *--q) != '\0');;
1555 /* The label, as a '\0' ended string, starts at symbol_name_build. */
1556 return (symbol_name_build);
1559 /* Decode name that may have been generated by foo_label_name() above.
1560 If the name wasn't generated by foo_label_name(), then return it
1561 unaltered. This is used for error messages. */
1564 decode_local_label_name (s)
1568 char *symbol_decode;
1570 int instance_number;
1572 const char *message_format;
1575 #ifdef LOCAL_LABEL_PREFIX
1576 if (s[index] == LOCAL_LABEL_PREFIX)
1580 if (s[index] != 'L')
1583 for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
1584 label_number = (10 * label_number) + *p - '0';
1586 if (*p == DOLLAR_LABEL_CHAR)
1588 else if (*p == LOCAL_LABEL_CHAR)
1593 for (instance_number = 0, p++; ISDIGIT (*p); ++p)
1594 instance_number = (10 * instance_number) + *p - '0';
1596 message_format = _("\"%d\" (instance number %d of a %s label)");
1597 symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30);
1598 sprintf (symbol_decode, message_format, label_number, instance_number, type);
1600 return symbol_decode;
1603 /* Get the value of a symbol. */
1609 #ifdef BFD_ASSEMBLER
1610 if (LOCAL_SYMBOL_CHECK (s))
1611 return resolve_symbol_value (s);
1614 if (!s->sy_resolved)
1616 valueT val = resolve_symbol_value (s);
1620 if (s->sy_value.X_op != O_constant)
1622 static symbolS *recur;
1624 /* FIXME: In non BFD assemblers, S_IS_DEFINED and S_IS_COMMON
1625 may call S_GET_VALUE. We use a static symbol to avoid the
1626 immediate recursion. */
1628 return (valueT) s->sy_value.X_add_number;
1630 if (! s->sy_resolved
1631 || s->sy_value.X_op != O_symbol
1632 || (S_IS_DEFINED (s) && ! S_IS_COMMON (s)))
1633 as_bad (_("attempt to get value of unresolved symbol `%s'"),
1637 return (valueT) s->sy_value.X_add_number;
1640 /* Set the value of a symbol. */
1643 S_SET_VALUE (s, val)
1647 #ifdef BFD_ASSEMBLER
1648 if (LOCAL_SYMBOL_CHECK (s))
1650 ((struct local_symbol *) s)->lsy_value = val;
1655 s->sy_value.X_op = O_constant;
1656 s->sy_value.X_add_number = (offsetT) val;
1657 s->sy_value.X_unsigned = 0;
1661 copy_symbol_attributes (dest, src)
1662 symbolS *dest, *src;
1664 if (LOCAL_SYMBOL_CHECK (dest))
1665 dest = local_symbol_convert ((struct local_symbol *) dest);
1666 if (LOCAL_SYMBOL_CHECK (src))
1667 src = local_symbol_convert ((struct local_symbol *) src);
1669 #ifdef BFD_ASSEMBLER
1670 /* In an expression, transfer the settings of these flags.
1671 The user can override later, of course. */
1672 #define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT)
1673 dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
1676 #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
1677 OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
1681 #ifdef BFD_ASSEMBLER
1689 if (LOCAL_SYMBOL_CHECK (s))
1692 flags = s->bsym->flags;
1694 return (flags & BSF_FUNCTION) != 0;
1703 if (LOCAL_SYMBOL_CHECK (s))
1706 flags = s->bsym->flags;
1709 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
1712 return (flags & BSF_GLOBAL) != 0;
1719 if (LOCAL_SYMBOL_CHECK (s))
1721 return (s->bsym->flags & BSF_WEAK) != 0;
1728 if (LOCAL_SYMBOL_CHECK (s))
1730 return bfd_is_com_section (s->bsym->section);
1737 if (LOCAL_SYMBOL_CHECK (s))
1738 return ((struct local_symbol *) s)->lsy_section != undefined_section;
1739 return s->bsym->section != undefined_section;
1746 if (LOCAL_SYMBOL_CHECK (s))
1748 if (s->bsym->flags & BSF_DEBUGGING)
1760 if (LOCAL_SYMBOL_CHECK (s))
1763 flags = s->bsym->flags;
1766 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
1769 if (bfd_get_section (s->bsym) == reg_section)
1772 if (flag_strip_local_absolute
1773 && (flags & BSF_GLOBAL) == 0
1774 && bfd_get_section (s->bsym) == absolute_section)
1777 name = S_GET_NAME (s);
1778 return (name != NULL
1780 && (strchr (name, DOLLAR_LABEL_CHAR)
1781 || strchr (name, LOCAL_LABEL_CHAR)
1782 || (! flag_keep_locals
1783 && (bfd_is_local_label (stdoutput, s->bsym)
1786 && name[1] == '?')))));
1793 return S_IS_EXTERNAL (s);
1800 return S_GET_NAME (s) == 0;
1807 if (LOCAL_SYMBOL_CHECK (s))
1808 return ((struct local_symbol *) s)->lsy_name;
1809 return s->bsym->name;
1816 if (LOCAL_SYMBOL_CHECK (s))
1817 return ((struct local_symbol *) s)->lsy_section;
1818 return s->bsym->section;
1822 S_SET_SEGMENT (s, seg)
1826 /* Don't reassign section symbols. The direct reason is to prevent seg
1827 faults assigning back to const global symbols such as *ABS*, but it
1828 shouldn't happen anyway. */
1830 if (LOCAL_SYMBOL_CHECK (s))
1832 if (seg == reg_section)
1833 s = local_symbol_convert ((struct local_symbol *) s);
1836 ((struct local_symbol *) s)->lsy_section = seg;
1841 if (s->bsym->flags & BSF_SECTION_SYM)
1843 if (s->bsym->section != seg)
1847 s->bsym->section = seg;
1854 if (LOCAL_SYMBOL_CHECK (s))
1855 s = local_symbol_convert ((struct local_symbol *) s);
1856 if ((s->bsym->flags & BSF_WEAK) != 0)
1858 /* Let .weak override .global. */
1861 if (s->bsym->flags & BSF_SECTION_SYM)
1866 /* Do not reassign section symbols. */
1867 as_where (& file, & line);
1868 as_warn_where (file, line,
1869 _("section symbols are already global"));
1872 s->bsym->flags |= BSF_GLOBAL;
1873 s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK);
1877 S_CLEAR_EXTERNAL (s)
1880 if (LOCAL_SYMBOL_CHECK (s))
1882 if ((s->bsym->flags & BSF_WEAK) != 0)
1884 /* Let .weak override. */
1887 s->bsym->flags |= BSF_LOCAL;
1888 s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK);
1895 if (LOCAL_SYMBOL_CHECK (s))
1896 s = local_symbol_convert ((struct local_symbol *) s);
1897 s->bsym->flags |= BSF_WEAK;
1898 s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL);
1902 S_SET_NAME (s, name)
1906 if (LOCAL_SYMBOL_CHECK (s))
1908 ((struct local_symbol *) s)->lsy_name = name;
1911 s->bsym->name = name;
1913 #endif /* BFD_ASSEMBLER */
1915 #ifdef SYMBOLS_NEED_BACKPOINTERS
1917 /* Return the previous symbol in a chain. */
1923 if (LOCAL_SYMBOL_CHECK (s))
1925 return s->sy_previous;
1928 #endif /* SYMBOLS_NEED_BACKPOINTERS */
1930 /* Return the next symbol in a chain. */
1936 if (LOCAL_SYMBOL_CHECK (s))
1941 /* Return a pointer to the value of a symbol as an expression. */
1944 symbol_get_value_expression (s)
1947 if (LOCAL_SYMBOL_CHECK (s))
1948 s = local_symbol_convert ((struct local_symbol *) s);
1949 return &s->sy_value;
1952 /* Set the value of a symbol to an expression. */
1955 symbol_set_value_expression (s, exp)
1957 const expressionS *exp;
1959 if (LOCAL_SYMBOL_CHECK (s))
1960 s = local_symbol_convert ((struct local_symbol *) s);
1964 /* Set the frag of a symbol. */
1967 symbol_set_frag (s, f)
1971 #ifdef BFD_ASSEMBLER
1972 if (LOCAL_SYMBOL_CHECK (s))
1974 local_symbol_set_frag ((struct local_symbol *) s, f);
1981 /* Return the frag of a symbol. */
1987 #ifdef BFD_ASSEMBLER
1988 if (LOCAL_SYMBOL_CHECK (s))
1989 return local_symbol_get_frag ((struct local_symbol *) s);
1994 /* Mark a symbol as having been used. */
1997 symbol_mark_used (s)
2000 if (LOCAL_SYMBOL_CHECK (s))
2005 /* Clear the mark of whether a symbol has been used. */
2008 symbol_clear_used (s)
2011 if (LOCAL_SYMBOL_CHECK (s))
2012 s = local_symbol_convert ((struct local_symbol *) s);
2016 /* Return whether a symbol has been used. */
2022 if (LOCAL_SYMBOL_CHECK (s))
2027 /* Mark a symbol as having been used in a reloc. */
2030 symbol_mark_used_in_reloc (s)
2033 if (LOCAL_SYMBOL_CHECK (s))
2034 s = local_symbol_convert ((struct local_symbol *) s);
2035 s->sy_used_in_reloc = 1;
2038 /* Clear the mark of whether a symbol has been used in a reloc. */
2041 symbol_clear_used_in_reloc (s)
2044 if (LOCAL_SYMBOL_CHECK (s))
2046 s->sy_used_in_reloc = 0;
2049 /* Return whether a symbol has been used in a reloc. */
2052 symbol_used_in_reloc_p (s)
2055 if (LOCAL_SYMBOL_CHECK (s))
2057 return s->sy_used_in_reloc;
2060 /* Mark a symbol as an MRI common symbol. */
2063 symbol_mark_mri_common (s)
2066 if (LOCAL_SYMBOL_CHECK (s))
2067 s = local_symbol_convert ((struct local_symbol *) s);
2068 s->sy_mri_common = 1;
2071 /* Clear the mark of whether a symbol is an MRI common symbol. */
2074 symbol_clear_mri_common (s)
2077 if (LOCAL_SYMBOL_CHECK (s))
2079 s->sy_mri_common = 0;
2082 /* Return whether a symbol is an MRI common symbol. */
2085 symbol_mri_common_p (s)
2088 if (LOCAL_SYMBOL_CHECK (s))
2090 return s->sy_mri_common;
2093 /* Mark a symbol as having been written. */
2096 symbol_mark_written (s)
2099 if (LOCAL_SYMBOL_CHECK (s))
2104 /* Clear the mark of whether a symbol has been written. */
2107 symbol_clear_written (s)
2110 if (LOCAL_SYMBOL_CHECK (s))
2115 /* Return whether a symbol has been written. */
2118 symbol_written_p (s)
2121 if (LOCAL_SYMBOL_CHECK (s))
2126 /* Mark a symbol has having been resolved. */
2129 symbol_mark_resolved (s)
2132 #ifdef BFD_ASSEMBLER
2133 if (LOCAL_SYMBOL_CHECK (s))
2135 local_symbol_mark_resolved ((struct local_symbol *) s);
2142 /* Return whether a symbol has been resolved. */
2145 symbol_resolved_p (s)
2148 #ifdef BFD_ASSEMBLER
2149 if (LOCAL_SYMBOL_CHECK (s))
2150 return local_symbol_resolved_p ((struct local_symbol *) s);
2152 return s->sy_resolved;
2155 /* Return whether a symbol is a section symbol. */
2158 symbol_section_p (s)
2159 symbolS *s ATTRIBUTE_UNUSED;
2161 if (LOCAL_SYMBOL_CHECK (s))
2163 #ifdef BFD_ASSEMBLER
2164 return (s->bsym->flags & BSF_SECTION_SYM) != 0;
2171 /* Return whether a symbol is equated to another symbol. */
2174 symbol_equated_p (s)
2177 if (LOCAL_SYMBOL_CHECK (s))
2179 return s->sy_value.X_op == O_symbol;
2182 /* Return whether a symbol is equated to another symbol, and should be
2183 treated specially when writing out relocs. */
2186 symbol_equated_reloc_p (s)
2189 if (LOCAL_SYMBOL_CHECK (s))
2191 /* X_op_symbol, normally not used for O_symbol, is set by
2192 resolve_symbol_value to flag expression syms that have been
2194 return (s->sy_value.X_op == O_symbol
2195 && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL)
2196 || ! S_IS_DEFINED (s)
2197 || S_IS_COMMON (s)));
2200 /* Return whether a symbol has a constant value. */
2203 symbol_constant_p (s)
2206 if (LOCAL_SYMBOL_CHECK (s))
2208 return s->sy_value.X_op == O_constant;
2211 #ifdef BFD_ASSEMBLER
2213 /* Return the BFD symbol for a symbol. */
2216 symbol_get_bfdsym (s)
2219 if (LOCAL_SYMBOL_CHECK (s))
2220 s = local_symbol_convert ((struct local_symbol *) s);
2224 /* Set the BFD symbol for a symbol. */
2227 symbol_set_bfdsym (s, bsym)
2231 if (LOCAL_SYMBOL_CHECK (s))
2232 s = local_symbol_convert ((struct local_symbol *) s);
2236 #endif /* BFD_ASSEMBLER */
2238 #ifdef OBJ_SYMFIELD_TYPE
2240 /* Get a pointer to the object format information for a symbol. */
2246 if (LOCAL_SYMBOL_CHECK (s))
2247 s = local_symbol_convert ((struct local_symbol *) s);
2251 /* Set the object format information for a symbol. */
2254 symbol_set_obj (s, o)
2256 OBJ_SYMFIELD_TYPE *o;
2258 if (LOCAL_SYMBOL_CHECK (s))
2259 s = local_symbol_convert ((struct local_symbol *) s);
2263 #endif /* OBJ_SYMFIELD_TYPE */
2265 #ifdef TC_SYMFIELD_TYPE
2267 /* Get a pointer to the processor information for a symbol. */
2273 if (LOCAL_SYMBOL_CHECK (s))
2274 s = local_symbol_convert ((struct local_symbol *) s);
2278 /* Set the processor information for a symbol. */
2281 symbol_set_tc (s, o)
2283 TC_SYMFIELD_TYPE *o;
2285 if (LOCAL_SYMBOL_CHECK (s))
2286 s = local_symbol_convert ((struct local_symbol *) s);
2290 #endif /* TC_SYMFIELD_TYPE */
2295 symbol_lastP = NULL;
2296 symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
2297 sy_hash = hash_new ();
2298 #ifdef BFD_ASSEMBLER
2299 local_hash = hash_new ();
2302 memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
2303 #ifdef BFD_ASSEMBLER
2304 #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL)
2305 abs_symbol.bsym = bfd_abs_section.symbol;
2308 /* Can't initialise a union. Sigh. */
2309 S_SET_SEGMENT (&abs_symbol, absolute_section);
2311 abs_symbol.sy_value.X_op = O_constant;
2312 abs_symbol.sy_frag = &zero_address_frag;
2314 if (LOCAL_LABELS_FB)
2320 /* Maximum indent level.
2321 Available for modification inside a gdb session. */
2322 int max_indent_level = 8;
2329 printf ("%*s", indent_level * 4, "");
2335 print_symbol_value_1 (file, sym)
2339 const char *name = S_GET_NAME (sym);
2340 if (!name || !name[0])
2342 fprintf (file, "sym %lx %s", (unsigned long) sym, name);
2344 if (LOCAL_SYMBOL_CHECK (sym))
2346 #ifdef BFD_ASSEMBLER
2347 struct local_symbol *locsym = (struct local_symbol *) sym;
2348 if (local_symbol_get_frag (locsym) != &zero_address_frag
2349 && local_symbol_get_frag (locsym) != NULL)
2350 fprintf (file, " frag %lx", (long) local_symbol_get_frag (locsym));
2351 if (local_symbol_resolved_p (locsym))
2352 fprintf (file, " resolved");
2353 fprintf (file, " local");
2358 if (sym->sy_frag != &zero_address_frag)
2359 fprintf (file, " frag %lx", (long) sym->sy_frag);
2361 fprintf (file, " written");
2362 if (sym->sy_resolved)
2363 fprintf (file, " resolved");
2364 else if (sym->sy_resolving)
2365 fprintf (file, " resolving");
2366 if (sym->sy_used_in_reloc)
2367 fprintf (file, " used-in-reloc");
2369 fprintf (file, " used");
2370 if (S_IS_LOCAL (sym))
2371 fprintf (file, " local");
2372 if (S_IS_EXTERN (sym))
2373 fprintf (file, " extern");
2374 if (S_IS_DEBUG (sym))
2375 fprintf (file, " debug");
2376 if (S_IS_DEFINED (sym))
2377 fprintf (file, " defined");
2379 fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym)));
2380 if (symbol_resolved_p (sym))
2382 segT s = S_GET_SEGMENT (sym);
2384 if (s != undefined_section
2385 && s != expr_section)
2386 fprintf (file, " %lx", (long) S_GET_VALUE (sym));
2388 else if (indent_level < max_indent_level
2389 && S_GET_SEGMENT (sym) != undefined_section)
2392 fprintf (file, "\n%*s<", indent_level * 4, "");
2393 #ifdef BFD_ASSEMBLER
2394 if (LOCAL_SYMBOL_CHECK (sym))
2395 fprintf (file, "constant %lx",
2396 (long) ((struct local_symbol *) sym)->lsy_value);
2399 print_expr_1 (file, &sym->sy_value);
2400 fprintf (file, ">");
2407 print_symbol_value (sym)
2411 print_symbol_value_1 (stderr, sym);
2412 fprintf (stderr, "\n");
2416 print_binary (file, name, exp)
2422 fprintf (file, "%s\n%*s<", name, indent_level * 4, "");
2423 print_symbol_value_1 (file, exp->X_add_symbol);
2424 fprintf (file, ">\n%*s<", indent_level * 4, "");
2425 print_symbol_value_1 (file, exp->X_op_symbol);
2426 fprintf (file, ">");
2431 print_expr_1 (file, exp)
2435 fprintf (file, "expr %lx ", (long) exp);
2439 fprintf (file, "illegal");
2442 fprintf (file, "absent");
2445 fprintf (file, "constant %lx", (long) exp->X_add_number);
2449 fprintf (file, "symbol\n%*s<", indent_level * 4, "");
2450 print_symbol_value_1 (file, exp->X_add_symbol);
2451 fprintf (file, ">");
2453 if (exp->X_add_number)
2454 fprintf (file, "\n%*s%lx", indent_level * 4, "",
2455 (long) exp->X_add_number);
2459 fprintf (file, "register #%d", (int) exp->X_add_number);
2462 fprintf (file, "big");
2465 fprintf (file, "uminus -<");
2467 print_symbol_value_1 (file, exp->X_add_symbol);
2468 fprintf (file, ">");
2469 goto maybe_print_addnum;
2471 fprintf (file, "bit_not");
2474 print_binary (file, "multiply", exp);
2477 print_binary (file, "divide", exp);
2480 print_binary (file, "modulus", exp);
2483 print_binary (file, "lshift", exp);
2486 print_binary (file, "rshift", exp);
2488 case O_bit_inclusive_or:
2489 print_binary (file, "bit_ior", exp);
2491 case O_bit_exclusive_or:
2492 print_binary (file, "bit_xor", exp);
2495 print_binary (file, "bit_and", exp);
2498 print_binary (file, "eq", exp);
2501 print_binary (file, "ne", exp);
2504 print_binary (file, "lt", exp);
2507 print_binary (file, "le", exp);
2510 print_binary (file, "ge", exp);
2513 print_binary (file, "gt", exp);
2516 print_binary (file, "logical_and", exp);
2519 print_binary (file, "logical_or", exp);
2523 fprintf (file, "add\n%*s<", indent_level * 4, "");
2524 print_symbol_value_1 (file, exp->X_add_symbol);
2525 fprintf (file, ">\n%*s<", indent_level * 4, "");
2526 print_symbol_value_1 (file, exp->X_op_symbol);
2527 fprintf (file, ">");
2528 goto maybe_print_addnum;
2531 fprintf (file, "subtract\n%*s<", indent_level * 4, "");
2532 print_symbol_value_1 (file, exp->X_add_symbol);
2533 fprintf (file, ">\n%*s<", indent_level * 4, "");
2534 print_symbol_value_1 (file, exp->X_op_symbol);
2535 fprintf (file, ">");
2536 goto maybe_print_addnum;
2538 fprintf (file, "{unknown opcode %d}", (int) exp->X_op);
2548 print_expr_1 (stderr, exp);
2549 fprintf (stderr, "\n");
2553 symbol_print_statistics (file)
2556 hash_print_statistics (file, "symbol table", sy_hash);
2557 #ifdef BFD_ASSEMBLER
2558 hash_print_statistics (file, "mini local symbol table", local_hash);
2559 fprintf (file, "%lu mini local symbols created, %lu converted\n",
2560 local_symbol_count, local_symbol_conversion_count);