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- /* symbols.c -symbol table-
-
- Copyright (C) 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GAS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #define DEBUG
-
- #include <ctype.h>
-
- #include "as.h"
-
- #include "obstack.h" /* For "symbols.h" */
- #include "subsegs.h"
-
- #ifndef WORKING_DOT_WORD
- extern int new_broken_words;
- #endif
-
- /* symbol-name => struct symbol pointer */
- static struct hash_control *sy_hash;
-
- /* Below are commented in "symbols.h". */
- symbolS *symbol_rootP;
- symbolS *symbol_lastP;
- symbolS abs_symbol;
-
- symbolS *dot_text_symbol;
- symbolS *dot_data_symbol;
- symbolS *dot_bss_symbol;
-
- struct obstack notes;
-
- static void fb_label_init PARAMS ((void));
-
- void
- symbol_begin ()
- {
- symbol_lastP = NULL;
- symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
- sy_hash = hash_new ();
- memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
- #ifdef BFD_ASSEMBLER
- abs_symbol.bsym = bfd_abs_section.symbol;
- #else
- /* Can't initialise a union. Sigh. */
- S_SET_SEGMENT (&abs_symbol, absolute_section);
- #endif
- #ifdef LOCAL_LABELS_FB
- fb_label_init ();
- #endif /* LOCAL_LABELS_FB */
- }
-
- /*
- * symbol_new()
- *
- * Return a pointer to a new symbol.
- * Die if we can't make a new symbol.
- * Fill in the symbol's values.
- * Add symbol to end of symbol chain.
- *
- *
- * Please always call this to create a new symbol.
- *
- * Changes since 1985: Symbol names may not contain '\0'. Sigh.
- * 2nd argument is now a SEG rather than a TYPE. The mapping between
- * segments and types is mostly encapsulated herein (actually, we inherit it
- * from macros in struc-symbol.h).
- */
-
- symbolS *
- symbol_new (name, segment, value, frag)
- CONST char *name; /* It is copied, the caller can destroy/modify */
- segT segment; /* Segment identifier (SEG_<something>) */
- long value; /* Symbol value */
- fragS *frag; /* Associated fragment */
- {
- unsigned int name_length;
- char *preserved_copy_of_name;
- symbolS *symbolP;
-
- name_length = strlen (name) + 1; /* +1 for \0 */
- obstack_grow (¬es, name, name_length);
- preserved_copy_of_name = obstack_finish (¬es);
- #ifdef STRIP_UNDERSCORE
- if (preserved_copy_of_name[0] == '_')
- preserved_copy_of_name++;
- #endif
- symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS));
-
- /* symbol must be born in some fixed state. This seems as good as any. */
- memset (symbolP, 0, sizeof (symbolS));
-
-
- #ifdef BFD_ASSEMBLER
- symbolP->bsym = bfd_make_empty_symbol (stdoutput);
- assert (symbolP->bsym != 0);
- #endif
- S_SET_NAME (symbolP, preserved_copy_of_name);
-
- S_SET_SEGMENT (symbolP, segment);
- S_SET_VALUE (symbolP, value);
- symbol_clear_list_pointers(symbolP);
-
- symbolP->sy_frag = frag;
- symbolP->sy_forward = NULL;
- #ifndef BFD_ASSEMBLER
- symbolP->sy_number = ~0;
- symbolP->sy_name_offset = ~0;
- #endif
-
- /*
- * Link to end of symbol chain.
- */
- symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
-
- obj_symbol_new_hook (symbolP);
-
- #ifdef DEBUG
- verify_symbol_chain(symbol_rootP, symbol_lastP);
- #endif /* DEBUG */
-
- return symbolP;
- }
-
-
- /*
- * colon()
- *
- * We have just seen "<name>:".
- * Creates a struct symbol unless it already exists.
- *
- * Gripes if we are redefining a symbol incompatibly (and ignores it).
- *
- */
- void
- colon (sym_name) /* just seen "x:" - rattle symbols & frags */
- register char *sym_name; /* symbol name, as a cannonical string */
- /* We copy this string: OK to alter later. */
- {
- register symbolS *symbolP; /* symbol we are working with */
-
- #ifdef LOCAL_LABELS_DOLLAR
- /* Sun local labels go out of scope whenever a non-local symbol is
- defined. */
-
- if (*sym_name != 'L')
- dollar_label_clear ();
- #endif /* LOCAL_LABELS_DOLLAR */
-
- #ifndef WORKING_DOT_WORD
- if (new_broken_words)
- {
- struct broken_word *a;
- int possible_bytes;
- fragS *frag_tmp;
- char *frag_opcode;
-
- extern const int md_short_jump_size;
- extern const int md_long_jump_size;
- possible_bytes = (md_short_jump_size
- + new_broken_words * md_long_jump_size);
-
- frag_tmp = frag_now;
- frag_opcode = frag_var (rs_broken_word,
- possible_bytes,
- possible_bytes,
- (relax_substateT) 0,
- (symbolS *) broken_words,
- 0L,
- NULL);
-
- /* We want to store the pointer to where to insert the jump table in the
- fr_opcode of the rs_broken_word frag. This requires a little
- hackery. */
- while (frag_tmp
- && (frag_tmp->fr_type != rs_broken_word
- || frag_tmp->fr_opcode))
- frag_tmp = frag_tmp->fr_next;
- know (frag_tmp);
- frag_tmp->fr_opcode = frag_opcode;
- new_broken_words = 0;
-
- for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word)
- a->dispfrag = frag_tmp;
- }
- #endif /* WORKING_DOT_WORD */
-
- if ((symbolP = symbol_find (sym_name)) != 0)
- {
- #ifdef RESOLVE_SYMBOL_REDEFINITION
- if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
- return;
- #endif
- /*
- * Now check for undefined symbols
- */
- if (!S_IS_DEFINED (symbolP))
- {
- if (S_GET_VALUE (symbolP) == 0)
- {
- symbolP->sy_frag = frag_now;
- #ifdef OBJ_VMS
- S_GET_OTHER(symbolP) = const_flag;
- #endif
- S_SET_VALUE (symbolP, obstack_next_free (&frags) - frag_now->fr_literal);
- S_SET_SEGMENT (symbolP, now_seg);
- #ifdef N_UNDF
- know (N_UNDF == 0);
- #endif /* if we have one, it better be zero. */
-
- }
- else
- {
- /*
- * There are still several cases to check:
- * A .comm/.lcomm symbol being redefined as
- * initialized data is OK
- * A .comm/.lcomm symbol being redefined with
- * a larger size is also OK
- *
- * This only used to be allowed on VMS gas, but Sun cc
- * on the sparc also depends on it.
- */
-
- if (((!S_IS_DEBUG (symbolP)
- && !S_IS_DEFINED (symbolP)
- && S_IS_EXTERNAL (symbolP))
- || S_GET_SEGMENT (symbolP) == bss_section)
- && (now_seg == data_section
- || now_seg == S_GET_SEGMENT (symbolP)))
- {
- /*
- * Select which of the 2 cases this is
- */
- if (now_seg != data_section)
- {
- /*
- * New .comm for prev .comm symbol.
- * If the new size is larger we just
- * change its value. If the new size
- * is smaller, we ignore this symbol
- */
- if (S_GET_VALUE (symbolP)
- < ((unsigned) frag_now_fix ()))
- {
- S_SET_VALUE (symbolP, frag_now_fix ());
- }
- }
- else
- {
- /* It is a .comm/.lcomm being converted to initialized
- data. */
- symbolP->sy_frag = frag_now;
- #ifdef OBJ_VMS
- S_GET_OTHER(symbolP) = const_flag;
- #endif /* OBJ_VMS */
- S_SET_VALUE (symbolP, frag_now_fix ());
- S_SET_SEGMENT (symbolP, now_seg); /* keep N_EXT bit */
- }
- }
- else
- {
- #if defined (S_GET_OTHER) && defined (S_GET_DESC)
- as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%d.",
- sym_name,
- segment_name (S_GET_SEGMENT (symbolP)),
- S_GET_OTHER (symbolP), S_GET_DESC (symbolP),
- S_GET_VALUE (symbolP));
- #else
- as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.",
- sym_name,
- segment_name (S_GET_SEGMENT (symbolP)),
- S_GET_VALUE (symbolP));
- #endif
- }
- } /* if the undefined symbol has no value */
- }
- else
- {
- /* Don't blow up if the definition is the same */
- if (!(frag_now == symbolP->sy_frag
- && S_GET_VALUE (symbolP) == obstack_next_free (&frags) - frag_now->fr_literal
- && S_GET_SEGMENT (symbolP) == now_seg))
- as_fatal ("Symbol %s already defined.", sym_name);
- } /* if this symbol is not yet defined */
-
- }
- else
- {
- symbolP = symbol_new (sym_name,
- now_seg,
- (valueT) (obstack_next_free (&frags) - frag_now->fr_literal),
- frag_now);
- #ifdef OBJ_VMS
- S_SET_OTHER (symbolP, const_flag);
- #endif /* OBJ_VMS */
-
- symbol_table_insert (symbolP);
- } /* if we have seen this symbol before */
-
- return;
- } /* colon() */
-
-
- /*
- * symbol_table_insert()
- *
- * Die if we can't insert the symbol.
- *
- */
-
- void
- symbol_table_insert (symbolP)
- symbolS *symbolP;
- {
- register char *error_string;
-
- know (symbolP);
- know (S_GET_NAME (symbolP));
-
- if (*(error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (char *) symbolP)))
- {
- as_fatal ("Inserting \"%s\" into symbol table failed: %s",
- S_GET_NAME (symbolP), error_string);
- } /* on error */
- } /* symbol_table_insert() */
-
- /*
- * symbol_find_or_make()
- *
- * If a symbol name does not exist, create it as undefined, and insert
- * it into the symbol table. Return a pointer to it.
- */
- symbolS *
- symbol_find_or_make (name)
- char *name;
- {
- register symbolS *symbolP;
-
- symbolP = symbol_find (name);
-
- if (symbolP == NULL)
- {
- symbolP = symbol_make (name);
-
- symbol_table_insert (symbolP);
- } /* if symbol wasn't found */
-
- return (symbolP);
- } /* symbol_find_or_make() */
-
- symbolS *
- symbol_make (name)
- CONST char *name;
- {
- symbolS *symbolP;
-
- /* Let the machine description default it, e.g. for register names. */
- symbolP = md_undefined_symbol ((char *) name);
-
- if (!symbolP)
- symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
-
- return (symbolP);
- } /* symbol_make() */
-
- /*
- * symbol_find()
- *
- * Implement symbol table lookup.
- * In: A symbol's name as a string: '\0' can't be part of a symbol name.
- * Out: NULL if the name was not in the symbol table, else the address
- * of a struct symbol associated with that name.
- */
-
- symbolS *
- symbol_find (name)
- CONST char *name;
- {
- #ifdef STRIP_UNDERSCORE
- return (symbol_find_base (name, 1));
- #else /* STRIP_UNDERSCORE */
- return (symbol_find_base (name, 0));
- #endif /* STRIP_UNDERSCORE */
- } /* symbol_find() */
-
- symbolS *
- symbol_find_base (name, strip_underscore)
- CONST char *name;
- int strip_underscore;
- {
- if (strip_underscore && *name == '_')
- name++;
- return ((symbolS *) hash_find (sy_hash, name));
- }
-
- /*
- * Once upon a time, symbols were kept in a singly linked list. At
- * least coff needs to be able to rearrange them from time to time, for
- * which a doubly linked list is much more convenient. Loic did these
- * as macros which seemed dangerous to me so they're now functions.
- * xoxorich.
- */
-
- /* Link symbol ADDME after symbol TARGET in the chain. */
- void
- symbol_append (addme, target, rootPP, lastPP)
- symbolS *addme;
- symbolS *target;
- symbolS **rootPP;
- symbolS **lastPP;
- {
- if (target == NULL)
- {
- know (*rootPP == NULL);
- know (*lastPP == NULL);
- *rootPP = addme;
- *lastPP = addme;
- return;
- } /* if the list is empty */
-
- if (target->sy_next != NULL)
- {
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- target->sy_next->sy_previous = addme;
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
- }
- else
- {
- know (*lastPP == target);
- *lastPP = addme;
- } /* if we have a next */
-
- addme->sy_next = target->sy_next;
- target->sy_next = addme;
-
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- addme->sy_previous = target;
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
- }
-
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- /* Remove SYMBOLP from the list. */
- void
- symbol_remove (symbolP, rootPP, lastPP)
- symbolS *symbolP;
- symbolS **rootPP;
- symbolS **lastPP;
- {
- if (symbolP == *rootPP)
- {
- *rootPP = symbolP->sy_next;
- } /* if it was the root */
-
- if (symbolP == *lastPP)
- {
- *lastPP = symbolP->sy_previous;
- } /* if it was the tail */
-
- if (symbolP->sy_next != NULL)
- {
- symbolP->sy_next->sy_previous = symbolP->sy_previous;
- } /* if not last */
-
- if (symbolP->sy_previous != NULL)
- {
- symbolP->sy_previous->sy_next = symbolP->sy_next;
- } /* if not first */
-
- #ifdef DEBUG
- verify_symbol_chain (*rootPP, *lastPP);
- #endif /* DEBUG */
- }
-
- /* Set the chain pointers of SYMBOL to null. */
- void
- symbol_clear_list_pointers (symbolP)
- symbolS *symbolP;
- {
- symbolP->sy_next = NULL;
- symbolP->sy_previous = NULL;
- }
-
- /* Link symbol ADDME before symbol TARGET in the chain. */
- void
- symbol_insert (addme, target, rootPP, lastPP)
- symbolS *addme;
- symbolS *target;
- symbolS **rootPP;
- symbolS **lastPP;
- {
- if (target->sy_previous != NULL)
- {
- target->sy_previous->sy_next = addme;
- }
- else
- {
- know (*rootPP == target);
- *rootPP = addme;
- } /* if not first */
-
- addme->sy_previous = target->sy_previous;
- target->sy_previous = addme;
- addme->sy_next = target;
-
- #ifdef DEBUG
- verify_symbol_chain (*rootPP, *lastPP);
- #endif /* DEBUG */
- }
-
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
-
- void
- verify_symbol_chain (rootP, lastP)
- symbolS *rootP;
- symbolS *lastP;
- {
- symbolS *symbolP = rootP;
-
- if (symbolP == NULL)
- return;
-
- for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
- {
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- know (symbolP->sy_next->sy_previous == symbolP);
- #else
- /* Walk the list anyways, to make sure pointers are still good. */
- *symbolP;
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
- }
-
- assert (lastP == symbolP);
- }
-
- void
- verify_symbol_chain_2 (sym)
- symbolS *sym;
- {
- symbolS *p = sym, *n = sym;
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- while (symbol_previous (p))
- p = symbol_previous (p);
- #endif
- while (symbol_next (n))
- n = symbol_next (n);
- verify_symbol_chain (p, n);
- }
-
- #ifdef LOCAL_LABELS_DOLLAR
-
- /* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
- They are *really* local. That is, they go out of scope whenever we see a
- label that isn't local. Also, like fb labels, there can be multiple
- instances of a dollar label. Therefor, we name encode each instance with
- the instance number, keep a list of defined symbols separate from the real
- symbol table, and we treat these buggers as a sparse array. */
-
- static long *dollar_labels;
- static long *dollar_label_instances;
- static char *dollar_label_defines;
- static long dollar_label_count;
- static long dollar_label_max;
-
- int
- dollar_label_defined (label)
- long label;
- {
- long *i;
-
- know ((dollar_labels != NULL) || (dollar_label_count == 0));
-
- for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
- if (*i == label)
- return dollar_label_defines[i - dollar_labels];
-
- /* if we get here, label isn't defined */
- return 0;
- } /* dollar_label_defined() */
-
- static int
- dollar_label_instance (label)
- long label;
- {
- long *i;
-
- know ((dollar_labels != NULL) || (dollar_label_count == 0));
-
- for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
- if (*i == label)
- return (dollar_label_instances[i - dollar_labels]);
-
- /* If we get here, we haven't seen the label before, therefore its instance
- count is zero. */
- return 0;
- }
-
- void
- dollar_label_clear ()
- {
- memset (dollar_label_defines, '\0', dollar_label_count);
- }
-
- #define DOLLAR_LABEL_BUMP_BY 10
-
- void
- define_dollar_label (label)
- long label;
- {
- long *i;
-
- for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
- if (*i == label)
- {
- ++dollar_label_instances[i - dollar_labels];
- dollar_label_defines[i - dollar_labels] = 1;
- return;
- }
-
- /* if we get to here, we don't have label listed yet. */
-
- if (dollar_labels == NULL)
- {
- dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
- dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
- dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
- dollar_label_max = DOLLAR_LABEL_BUMP_BY;
- dollar_label_count = 0;
- }
- else if (dollar_label_count == dollar_label_max)
- {
- dollar_label_max += DOLLAR_LABEL_BUMP_BY;
- dollar_labels = (long *) xrealloc ((char *) dollar_labels,
- dollar_label_max * sizeof (long));
- dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
- dollar_label_max * sizeof (long));
- dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
- } /* if we needed to grow */
-
- dollar_labels[dollar_label_count] = label;
- dollar_label_instances[dollar_label_count] = 1;
- dollar_label_defines[dollar_label_count] = 1;
- ++dollar_label_count;
- }
-
- /*
- * dollar_label_name()
- *
- * Caller must copy returned name: we re-use the area for the next name.
- *
- * The mth occurence of label n: is turned into the symbol "Ln^Am" where
- * n is the label number and m is the instance number. "L" makes it a label discarded
- * unless debugging and "^A"('\1') ensures no ordinary symbol SHOULD get the
- * same name as a local label symbol. The first "4:" is "L4^A1" - the m
- * numbers begin at 1.
- *
- * fb labels get the same treatment, except that ^B is used in place of ^A.
- */
-
- char * /* Return local label name. */
- dollar_label_name (n, augend)
- register long n; /* we just saw "n$:" : n a number */
- register int augend; /* 0 for current instance, 1 for new instance */
- {
- long i;
- /* Returned to caller, then copied. used for created names ("4f") */
- static char symbol_name_build[24];
- register char *p;
- register char *q;
- char symbol_name_temporary[20]; /* build up a number, BACKWARDS */
-
- know (n >= 0);
- know (augend == 0 || augend == 1);
- p = symbol_name_build;
- *p++ = 'L';
-
- /* Next code just does sprintf( {}, "%d", n); */
- /* label number */
- q = symbol_name_temporary;
- for (*q++ = 0, i = n; i; ++q)
- {
- *q = i % 10 + '0';
- i /= 10;
- }
- while ((*p = *--q) != '\0')
- ++p;
-
- *p++ = 1; /* ^A */
-
- /* instance number */
- q = symbol_name_temporary;
- for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q)
- {
- *q = i % 10 + '0';
- i /= 10;
- }
- while ((*p++ = *--q) != '\0');;
-
- /* The label, as a '\0' ended string, starts at symbol_name_build. */
- return symbol_name_build;
- }
-
- #endif /* LOCAL_LABELS_DOLLAR */
-
- #ifdef LOCAL_LABELS_FB
-
- /*
- * Sombody else's idea of local labels. They are made by "n:" where n
- * is any decimal digit. Refer to them with
- * "nb" for previous (backward) n:
- * or "nf" for next (forward) n:.
- *
- * We do a little better and let n be any number, not just a single digit, but
- * since the other guy's assembler only does ten, we treat the first ten
- * specially.
- *
- * Like someone else's assembler, we have one set of local label counters for
- * entire assembly, not one set per (sub)segment like in most assemblers. This
- * implies that one can refer to a label in another segment, and indeed some
- * crufty compilers have done just that.
- *
- * Since there could be a LOT of these things, treat them as a sparse array.
- */
-
- #define FB_LABEL_SPECIAL (10)
-
- static long fb_low_counter[FB_LABEL_SPECIAL];
- static long *fb_labels;
- static long *fb_label_instances;
- static long fb_label_count = 0;
- static long fb_label_max = 0;
-
- /* this must be more than FB_LABEL_SPECIAL */
- #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
-
- static void
- fb_label_init ()
- {
- memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
- } /* fb_label_init() */
-
- /* add one to the instance number of this fb label */
- void
- fb_label_instance_inc (label)
- long label;
- {
- long *i;
-
- if (label < FB_LABEL_SPECIAL)
- {
- ++fb_low_counter[label];
- return;
- }
-
- for (i = fb_labels + FB_LABEL_SPECIAL; i < fb_labels + fb_label_count; ++i)
- {
- if (*i == label)
- {
- ++fb_label_instances[i - fb_labels];
- return;
- } /* if we find it */
- } /* for each existing label */
-
- /* if we get to here, we don't have label listed yet. */
-
- if (fb_labels == NULL)
- {
- fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
- fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
- fb_label_max = FB_LABEL_BUMP_BY;
- fb_label_count = FB_LABEL_SPECIAL;
-
- }
- else if (fb_label_count == fb_label_max)
- {
- fb_label_max += FB_LABEL_BUMP_BY;
- fb_labels = (long *) xrealloc ((char *) fb_labels,
- fb_label_max * sizeof (long));
- fb_label_instances = (long *) xrealloc ((char *) fb_label_instances,
- fb_label_max * sizeof (long));
- } /* if we needed to grow */
-
- fb_labels[fb_label_count] = label;
- fb_label_instances[fb_label_count] = 1;
- ++fb_label_count;
- return;
- } /* fb_label_instance_inc() */
-
- static long
- fb_label_instance (label)
- long label;
- {
- long *i;
-
- if (label < FB_LABEL_SPECIAL)
- {
- return (fb_low_counter[label]);
- }
-
- for (i = fb_labels + FB_LABEL_SPECIAL; i < fb_labels + fb_label_count; ++i)
- {
- if (*i == label)
- {
- return (fb_label_instances[i - fb_labels]);
- } /* if we find it */
- } /* for each existing label */
-
- /* NOTREACHED */
- abort ();
- }
-
- /*
- * fb_label_name()
- *
- * Caller must copy returned name: we re-use the area for the next name.
- *
- * The mth occurence of label n: is turned into the symbol "Ln^Bm" where
- * n is the label number and m is the instance number. "L" makes it a label discarded
- * unless debugging and "^B"('\2') ensures no ordinary symbol SHOULD get the
- * same name as a local label symbol. The first "4:" is "L4^B1" - the m
- * numbers begin at 1.
- *
- * dollar labels get the same treatment, except that ^A is used in place of ^B.
- */
-
- char * /* Return local label name. */
- fb_label_name (n, augend)
- long n; /* we just saw "n:", "nf" or "nb" : n a number */
- long augend; /* 0 for nb, 1 for n:, nf */
- {
- long i;
- /* Returned to caller, then copied. used for created names ("4f") */
- static char symbol_name_build[24];
- register char *p;
- register char *q;
- char symbol_name_temporary[20]; /* build up a number, BACKWARDS */
-
- know (n >= 0);
- know (augend == 0 || augend == 1);
- p = symbol_name_build;
- *p++ = 'L';
-
- /* Next code just does sprintf( {}, "%d", n); */
- /* label number */
- q = symbol_name_temporary;
- for (*q++ = 0, i = n; i; ++q)
- {
- *q = i % 10 + '0';
- i /= 10;
- }
- while ((*p = *--q) != '\0')
- ++p;
-
- *p++ = 2; /* ^B */
-
- /* instance number */
- q = symbol_name_temporary;
- for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q)
- {
- *q = i % 10 + '0';
- i /= 10;
- }
- while ((*p++ = *--q) != '\0');;
-
- /* The label, as a '\0' ended string, starts at symbol_name_build. */
- return (symbol_name_build);
- } /* fb_label_name() */
-
- #endif /* LOCAL_LABELS_FB */
-
-
- /*
- * decode name that may have been generated by foo_label_name() above. If
- * the name wasn't generated by foo_label_name(), then return it unaltered.
- * This is used for error messages.
- */
-
- char *
- decode_local_label_name (s)
- char *s;
- {
- char *p;
- char *symbol_decode;
- int label_number;
- int instance_number;
- char *type;
- const char *message_format = "\"%d\" (instance number %d of a %s label)";
-
- if (s[0] != 'L')
- return (s);
-
- for (label_number = 0, p = s + 1; isdigit (*p); ++p)
- {
- label_number = (10 * label_number) + *p - '0';
- }
-
- if (*p == 1)
- {
- type = "dollar";
- }
- else if (*p == 2)
- {
- type = "fb";
- }
- else
- {
- return (s);
- }
-
- for (instance_number = 0, p = s + 1; isdigit (*p); ++p)
- {
- instance_number = (10 * instance_number) + *p - '0';
- }
-
- symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30);
- (void) sprintf (symbol_decode, message_format, label_number,
- instance_number, type);
-
- return (symbol_decode);
- } /* decode_local_label_name() */
-
- #ifdef BFD_ASSEMBLER
-
- S_IS_EXTERNAL (s)
- symbolS *s;
- {
- if (s->bsym->flags & BSF_EXPORT)
- return 1;
- return 0;
- }
-
- S_IS_COMMON (s)
- symbolS *s;
- {
- return s->bsym->section == &bfd_com_section;
- }
-
- S_IS_DEFINED (s)
- symbolS *s;
- {
- return s->bsym->section != undefined_section;
- }
-
- S_IS_DEBUG (s)
- symbolS *s;
- {
- if (s->bsym->flags & BSF_DEBUGGING)
- return 1;
- return 0;
- }
-
- S_IS_LOCAL (s)
- symbolS *s;
- {
- return (S_GET_NAME (s)
- && ! S_IS_DEBUG (s)
- && (strchr (S_GET_NAME (s), '\001')
- || strchr (S_GET_NAME (s), '\002')
- || (S_LOCAL_NAME (s)
- && !flagseen['L'])));
- }
-
- S_IS_EXTERN (s)
- symbolS *s;
- {
- return S_IS_EXTERNAL (s);
- }
-
- S_IS_STABD (s)
- symbolS *s;
- {
- return S_GET_NAME (s) == 0;
- }
-
- S_GET_VALUE (s)
- symbolS *s;
- {
- return s->bsym->value;
- }
-
- CONST char *
- S_GET_NAME (s)
- symbolS *s;
- {
- return s->bsym->name;
- }
-
- segT
- S_GET_SEGMENT (s)
- symbolS *s;
- {
- return s->bsym->section;
- }
-
- void
- S_SET_VALUE (s, val)
- symbolS *s;
- long val;
- {
- s->bsym->value = val;
- }
-
- void
- S_SET_SEGMENT (s, seg)
- symbolS *s;
- segT seg;
- {
- s->bsym->section = seg;
- }
-
- void
- S_SET_EXTERNAL (s)
- symbolS *s;
- {
- s->bsym->flags |= BSF_EXPORT;
- }
-
- void
- S_CLEAR_EXTERNAL (s)
- symbolS *s;
- {
- s->bsym->flags &= ~BSF_EXPORT;
- }
-
- void
- S_SET_NAME (s, name)
- symbolS *s;
- char *name;
- {
- s->bsym->name = name;
- }
- #endif /* BFD_ASSEMBLER */
-
- /* end of symbols.c */
-