/* symbols.c -symbol table-
-
- Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
along with GAS; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* #define DEBUG_SYMS / * to debug symbol list maintenance */
+
#include <ctype.h>
#include "as.h"
#ifndef WORKING_DOT_WORD
extern int new_broken_words;
#endif
-#ifdef VMS
-extern char const_flag;
-#endif
-static
-struct hash_control *
- sy_hash; /* symbol-name => struct symbol pointer */
+/* symbol-name => struct symbol pointer */
+static struct hash_control *sy_hash;
/* Below are commented in "symbols.h". */
-unsigned int local_bss_counter;
symbolS *symbol_rootP;
symbolS *symbol_lastP;
symbolS abs_symbol;
-symbolS *dot_text_symbol;
-symbolS *dot_data_symbol;
-symbolS *dot_bss_symbol;
-
struct obstack notes;
-#if __STDC__ == 1
-static void fb_label_init (void);
-#else /* not __STDC__ */
-static void fb_label_init ();
-#endif /* not __STDC__ */
-
-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));
- S_SET_SEGMENT (&abs_symbol, SEG_ABSOLUTE); /* Can't initialise a union. Sigh. */
- local_bss_counter = 0;
-#ifdef LOCAL_LABELS_FB
- fb_label_init ();
-#endif /* LOCAL_LABELS_FB */
-}
+static void fb_label_init PARAMS ((void));
/*
* symbol_new()
*/
symbolS *
-symbol_new (name, segment, value, frag)
- char *name; /* It is copied, the caller can destroy/modify */
+symbol_new (name, segment, valu, frag)
+ CONST char *name; /* It is copied, the caller can destroy/modify */
segT segment; /* Segment identifier (SEG_<something>) */
- long value; /* Symbol value */
+ valueT valu; /* Symbol value */
fragS *frag; /* Associated fragment */
{
unsigned int name_length;
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 STRIP_UNDERSCORE
- S_SET_NAME (symbolP, (*preserved_copy_of_name == '_'
- ? preserved_copy_of_name + 1
- : preserved_copy_of_name));
-#else /* STRIP_UNDERSCORE */
+
+#ifdef BFD_ASSEMBLER
+ symbolP->bsym = bfd_make_empty_symbol (stdoutput);
+ assert (symbolP->bsym != 0);
+ symbolP->bsym->udata = (PTR) symbolP;
+#endif
S_SET_NAME (symbolP, preserved_copy_of_name);
-#endif /* STRIP_UNDERSCORE */
S_SET_SEGMENT (symbolP, segment);
- S_SET_VALUE (symbolP, value);
- /* symbol_clear_list_pointers(symbolP); uneeded if symbol is born zeroed. */
+ S_SET_VALUE (symbolP, valu);
+ symbol_clear_list_pointers(symbolP);
symbolP->sy_frag = frag;
- /* krm: uneeded if symbol is born zeroed.
- symbolP->sy_forward = NULL; *//* JF */
+#ifndef BFD_ASSEMBLER
symbolP->sy_number = ~0;
- symbolP->sy_name_offset = ~0;
+ symbolP->sy_name_offset = (unsigned int) ~0;
+#endif
/*
- * Link to end of symbol chain.
- */
+ * 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 */
+#ifdef DEBUG_SYMS
+ verify_symbol_chain(symbol_rootP, symbol_lastP);
+#endif /* DEBUG_SYMS */
- return (symbolP);
-} /* symbol_new() */
+ return symbolP;
+}
\f
/*
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. */
+ /* Sun local labels go out of scope whenever a non-local symbol is
+ defined. */
if (*sym_name != 'L')
dollar_label_clear ();
fragS *frag_tmp;
char *frag_opcode;
- extern md_short_jump_size;
- extern md_long_jump_size;
- possible_bytes = md_short_jump_size + new_broken_words * md_long_jump_size;
+ 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,
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))
+ 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;
if ((symbolP = symbol_find (sym_name)) != 0)
{
-#ifdef VMS
- /*
- * If the new symbol is .comm AND it has a size of zero,
- * we ignore it (i.e. the old symbol overrides it)
- */
- if ((SEGMENT_TO_SYMBOL_TYPE ((int) now_seg) == (N_UNDF | N_EXT)) &&
- ((obstack_next_free (&frags) - frag_now->fr_literal) == 0))
+#ifdef RESOLVE_SYMBOL_REDEFINITION
+ if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
return;
+#endif
/*
- * If the old symbol is .comm and it has a size of zero,
- * we override it with the new symbol value.
- */
- if ((symbolP->sy_type == (N_UNDF | N_EXT))
- && (S_GET_VALUE (symbolP) == 0))
- {
- symbolP->sy_frag = frag_now;
- symbolP->sy_other = const_flag;
- S_SET_VALUE (symbolP, obstack_next_free (&frags) - frag_now->fr_literal);
- symbolP->sy_type |= SEGMENT_TO_SYMBOL_TYPE ((int) now_seg); /* keep N_EXT bit */
- return;
- }
-#endif /* VMS */
- /*
- * Now check for undefined symbols
- */
+ * Now check for undefined symbols
+ */
if (!S_IS_DEFINED (symbolP))
{
if (S_GET_VALUE (symbolP) == 0)
{
symbolP->sy_frag = frag_now;
-#ifdef VMS
- symbolP->sy_other = const_flag;
+#ifdef OBJ_VMS
+ S_GET_OTHER(symbolP) = const_flag;
#endif
- S_SET_VALUE (symbolP, obstack_next_free (&frags) - frag_now->fr_literal);
+ S_SET_VALUE (symbolP, (valueT) ((char*)obstack_next_free (&frags) - frag_now->fr_literal));
S_SET_SEGMENT (symbolP, now_seg);
#ifdef N_UNDF
know (N_UNDF == 0);
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.
- */
- /* char New_Type = SEGMENT_TO_SYMBOL_TYPE((int) now_seg); */
-#ifdef MANY_SEGMENTS
-#define SEG_BSS SEG_E2
-#define SEG_DATA SEG_E1
-#endif
-
- if (((!S_IS_DEBUG (symbolP) && !S_IS_DEFINED (symbolP) && S_IS_EXTERNAL (symbolP))
- || (S_GET_SEGMENT (symbolP) == SEG_BSS))
- && ((now_seg == SEG_DATA)
- || (now_seg == S_GET_SEGMENT (symbolP))))
+ * 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 != SEG_DATA)
+ * 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
- */
+ * 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) (obstack_next_free (&frags) - frag_now->fr_literal)))
+ < ((unsigned) frag_now_fix ()))
{
- S_SET_VALUE (symbolP,
- obstack_next_free (&frags) -
- frag_now->fr_literal);
+ S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
}
}
else
{
- /*
- * It is a .comm/.lcomm being converted
- * to initialized data.
- */
+ /* It is a .comm/.lcomm being converted to initialized
+ data. */
symbolP->sy_frag = frag_now;
-#ifdef VMS
- symbolP->sy_other = const_flag;
-#endif /* VMS */
- S_SET_VALUE (symbolP, obstack_next_free (&frags) - frag_now->fr_literal);
+#ifdef OBJ_VMS
+ S_GET_OTHER(symbolP) = const_flag;
+#endif /* OBJ_VMS */
+ S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
S_SET_SEGMENT (symbolP, now_seg); /* keep N_EXT bit */
}
}
else
{
-#ifdef OBJ_COFF
- as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.",
+#if defined (S_GET_OTHER) && defined (S_GET_DESC)
+ as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%ld.",
sym_name,
segment_name (S_GET_SEGMENT (symbolP)),
- S_GET_VALUE (symbolP));
-#else /* OBJ_COFF */
- as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%d.",
+ S_GET_OTHER (symbolP), S_GET_DESC (symbolP),
+ (long) S_GET_VALUE (symbolP));
+#else
+ as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%ld.",
sym_name,
segment_name (S_GET_SEGMENT (symbolP)),
- S_GET_OTHER (symbolP), S_GET_DESC (symbolP),
- S_GET_VALUE (symbolP));
-#endif /* OBJ_COFF */
+ (long) S_GET_VALUE (symbolP));
+#endif
}
} /* if the undefined symbol has no value */
}
{
/* 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_VALUE (symbolP) == (char*)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 */
{
symbolP = symbol_new (sym_name,
now_seg,
- (valueT) (obstack_next_free (&frags) - frag_now->fr_literal),
+ (valueT) ((char*)obstack_next_free (&frags) - frag_now->fr_literal),
frag_now);
-#ifdef VMS
+#ifdef OBJ_VMS
S_SET_OTHER (symbolP, const_flag);
-#endif /* VMS */
+#endif /* OBJ_VMS */
symbol_table_insert (symbolP);
} /* if we have seen this symbol before */
- return;
-} /* colon() */
+#ifdef tc_frob_label
+ tc_frob_label (symbolP);
+#endif
+}
\f
/*
symbol_table_insert (symbolP)
symbolS *symbolP;
{
- register char *error_string;
+ register const char *error_string;
know (symbolP);
know (S_GET_NAME (symbolP));
- if (*(error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (char *) symbolP)))
+ if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP)))
{
as_fatal ("Inserting \"%s\" into symbol table failed: %s",
S_GET_NAME (symbolP), error_string);
symbolS *
symbol_make (name)
- char *name;
+ CONST char *name;
{
symbolS *symbolP;
/* Let the machine description default it, e.g. for register names. */
- symbolP = md_undefined_symbol (name);
+ symbolP = md_undefined_symbol ((char *) name);
if (!symbolP)
- {
- symbolP = symbol_new (name,
- SEG_UNKNOWN,
- 0,
- &zero_address_frag);
- } /* if md didn't build us a symbol */
+ symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag);
return (symbolP);
} /* symbol_make() */
symbolS *
symbol_find (name)
- char *name;
+ CONST char *name;
{
#ifdef STRIP_UNDERSCORE
return (symbol_find_base (name, 1));
symbolS *
symbol_find_base (name, strip_underscore)
- char *name;
+ CONST char *name;
int strip_underscore;
{
if (strip_underscore && *name == '_')
#ifdef SYMBOLS_NEED_BACKPOINTERS
addme->sy_previous = target;
#endif /* SYMBOLS_NEED_BACKPOINTERS */
-
-#ifdef DEBUG
- /* verify_symbol_chain(*rootPP, *lastPP); */
-#endif /* DEBUG */
-
- return;
-} /* symbol_append() */
+}
#ifdef SYMBOLS_NEED_BACKPOINTERS
/* Remove SYMBOLP from the list. */
symbolP->sy_previous->sy_next = symbolP->sy_next;
} /* if not first */
-#ifdef DEBUG
+#ifdef DEBUG_SYMS
verify_symbol_chain (*rootPP, *lastPP);
-#endif /* DEBUG */
-
- return;
-} /* symbol_remove() */
+#endif /* DEBUG_SYMS */
+}
/* Set the chain pointers of SYMBOL to null. */
void
{
symbolP->sy_next = NULL;
symbolP->sy_previous = NULL;
-} /* symbol_clear_list_pointers() */
+}
/* Link symbol ADDME before symbol TARGET in the chain. */
void
target->sy_previous = addme;
addme->sy_next = target;
-#ifdef DEBUG
+#ifdef DEBUG_SYMS
verify_symbol_chain (*rootPP, *lastPP);
-#endif /* DEBUG */
-
- return;
-} /* symbol_insert() */
+#endif /* DEBUG_SYMS */
+}
#endif /* SYMBOLS_NEED_BACKPOINTERS */
symbolS *symbolP = rootP;
if (symbolP == NULL)
- {
- return;
- } /* empty chain */
+ return;
for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
{
#ifdef SYMBOLS_NEED_BACKPOINTERS
- /*$if (symbolP->sy_previous) {
- know(symbolP->sy_previous->sy_next == symbolP);
- } else {
- know(symbolP == rootP);
- }$*//* both directions */
know (symbolP->sy_next->sy_previous == symbolP);
-#else /* SYMBOLS_NEED_BACKPOINTERS */
+#else
+ /* Walk the list anyways, to make sure pointers are still good. */
;
#endif /* SYMBOLS_NEED_BACKPOINTERS */
- } /* verify pointers */
+ }
+
+ 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);
+}
+
+/* Resolve the value of a symbol. This is called during the final
+ pass over the symbol table to resolve any symbols with complex
+ values. */
+
+void
+resolve_symbol_value (symp)
+ symbolS *symp;
+{
+ int resolved;
+
+ if (symp->sy_resolved)
+ return;
- know (lastP == symbolP);
+ resolved = 0;
- return;
-} /* verify_symbol_chain() */
+ if (symp->sy_resolving)
+ {
+ as_bad ("Symbol definition loop encountered at %s",
+ S_GET_NAME (symp));
+ S_SET_VALUE (symp, (valueT) 0);
+ resolved = 1;
+ }
+ else
+ {
+ offsetT left, right, val;
+ segT seg_left, seg_right;
+
+ symp->sy_resolving = 1;
+
+ switch (symp->sy_value.X_op)
+ {
+ case O_absent:
+ S_SET_VALUE (symp, 0);
+ /* Fall through. */
+ case O_constant:
+ S_SET_VALUE (symp, S_GET_VALUE (symp) + symp->sy_frag->fr_address);
+ if (S_GET_SEGMENT (symp) == expr_section)
+ S_SET_SEGMENT (symp, absolute_section);
+ resolved = 1;
+ break;
+
+ case O_symbol:
+ resolve_symbol_value (symp->sy_value.X_add_symbol);
+
+#ifdef obj_frob_forward_symbol
+ /* Some object formats need to forward the segment. */
+ obj_frob_forward_symbol (symp);
+#endif
+
+ S_SET_VALUE (symp,
+ (symp->sy_value.X_add_number
+ + symp->sy_frag->fr_address
+ + S_GET_VALUE (symp->sy_value.X_add_symbol)));
+ if (S_GET_SEGMENT (symp) == expr_section
+ || S_GET_SEGMENT (symp) == undefined_section)
+ S_SET_SEGMENT (symp,
+ S_GET_SEGMENT (symp->sy_value.X_add_symbol));
+
+ resolved = symp->sy_value.X_add_symbol->sy_resolved;
+ break;
+
+ case O_uminus:
+ case O_bit_not:
+ resolve_symbol_value (symp->sy_value.X_add_symbol);
+ if (symp->sy_value.X_op == O_uminus)
+ val = - S_GET_VALUE (symp->sy_value.X_add_symbol);
+ else
+ val = ~ S_GET_VALUE (symp->sy_value.X_add_symbol);
+ S_SET_VALUE (symp,
+ (val
+ + symp->sy_value.X_add_number
+ + symp->sy_frag->fr_address));
+ if (S_GET_SEGMENT (symp) == expr_section
+ || S_GET_SEGMENT (symp) == undefined_section)
+ S_SET_SEGMENT (symp, absolute_section);
+ resolved = symp->sy_value.X_add_symbol->sy_resolved;
+ break;
+
+ case O_multiply:
+ case O_divide:
+ case O_modulus:
+ case O_left_shift:
+ case O_right_shift:
+ case O_bit_inclusive_or:
+ case O_bit_or_not:
+ case O_bit_exclusive_or:
+ case O_bit_and:
+ case O_add:
+ case O_subtract:
+ resolve_symbol_value (symp->sy_value.X_add_symbol);
+ resolve_symbol_value (symp->sy_value.X_op_symbol);
+ seg_left = S_GET_SEGMENT (symp->sy_value.X_add_symbol);
+ seg_right = S_GET_SEGMENT (symp->sy_value.X_op_symbol);
+ if (seg_left != seg_right
+ && seg_left != undefined_section
+ && seg_right != undefined_section)
+ as_bad ("%s is operation on symbols in different sections",
+ S_GET_NAME (symp));
+ if ((S_GET_SEGMENT (symp->sy_value.X_add_symbol)
+ != absolute_section)
+ && symp->sy_value.X_op != O_subtract)
+ as_bad ("%s is illegal operation on non-absolute symbols",
+ S_GET_NAME (symp));
+ left = S_GET_VALUE (symp->sy_value.X_add_symbol);
+ right = S_GET_VALUE (symp->sy_value.X_op_symbol);
+ switch (symp->sy_value.X_op)
+ {
+ case O_multiply: val = left * right; break;
+ case O_divide: val = left / right; break;
+ case O_modulus: val = left % right; break;
+ case O_left_shift: val = left << right; break;
+ case O_right_shift: val = left >> right; break;
+ case O_bit_inclusive_or: val = left | right; break;
+ case O_bit_or_not: val = left |~ right; break;
+ case O_bit_exclusive_or: val = left ^ right; break;
+ case O_bit_and: val = left & right; break;
+ case O_add: val = left + right; break;
+ case O_subtract: val = left - right; break;
+ default: abort ();
+ }
+ S_SET_VALUE (symp,
+ (symp->sy_value.X_add_number
+ + symp->sy_frag->fr_address
+ + val));
+ if (S_GET_SEGMENT (symp) == expr_section
+ || S_GET_SEGMENT (symp) == undefined_section)
+ S_SET_SEGMENT (symp, absolute_section);
+ resolved = (symp->sy_value.X_add_symbol->sy_resolved
+ && symp->sy_value.X_op_symbol->sy_resolved);
+ break;
+
+ case O_register:
+ case O_big:
+ case O_illegal:
+ /* Give an error (below) if not in expr_section. We don't
+ want to worry about expr_section symbols, because they
+ are fictional (they are created as part of expression
+ resolution), and any problems may not actually mean
+ anything. */
+ break;
+ }
+ }
+ /* Don't worry if we can't resolve an expr_section symbol. */
+ if (resolved)
+ symp->sy_resolved = 1;
+ else if (S_GET_SEGMENT (symp) != expr_section)
+ {
+ as_bad ("can't resolve value for symbol \"%s\"", S_GET_NAME (symp));
+ symp->sy_resolved = 1;
+ }
+}
#ifdef LOCAL_LABELS_DOLLAR
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 = NULL;
-static long *dollar_label_instances = NULL;
-static char *dollar_label_defines = NULL;
-static long dollar_label_count = 0;
-static long dollar_label_max = 0;
+static long *dollar_labels;
+static long *dollar_label_instances;
+static char *dollar_label_defines;
+static long dollar_label_count;
+static unsigned long dollar_label_max;
int
dollar_label_defined (label)
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]);
- } /* found it */
- } /* look for label */
+ if (*i == label)
+ return dollar_label_defines[i - dollar_labels];
/* if we get here, label isn't defined */
- return (0);
+ return 0;
} /* dollar_label_defined() */
static int
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]);
- } /* found it */
- } /* look for (the union :-) label */
+ if (*i == label)
+ return (dollar_label_instances[i - dollar_labels]);
- /* if we get here, we haven't seen the label before, therefor it's instance
- count is zero. */
- return (0);
-} /* dollar_label_instance() */
+ /* 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);
- return;
-} /* clear_dollar_labels() */
+ memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
+}
#define DOLLAR_LABEL_BUMP_BY 10
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 find it */
- } /* for each existing label */
+ 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. */
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_instances[dollar_label_count] = 1;
dollar_label_defines[dollar_label_count] = 1;
++dollar_label_count;
- return;
-} /* define_dollar_label() */
+}
/*
* 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.
+ * 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.
*/
while ((*p++ = *--q) != '\0');;
/* The label, as a '\0' ended string, starts at symbol_name_build. */
- return (symbol_name_build);
-} /* dollar_label_name() */
+ return symbol_name_build;
+}
#endif /* LOCAL_LABELS_DOLLAR */
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;
+static long fb_label_count;
+static long fb_label_max;
/* this must be more than FB_LABEL_SPECIAL */
#define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
fb_label_init ()
{
memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
- return;
} /* fb_label_init() */
/* add one to the instance number of this fb label */
return;
}
- for (i = fb_labels + FB_LABEL_SPECIAL; i < fb_labels + fb_label_count; ++i)
+ if (fb_labels != NULL)
{
- if (*i == label)
+ for (i = fb_labels + FB_LABEL_SPECIAL;
+ i < fb_labels + fb_label_count; ++i)
{
- ++fb_label_instances[i - fb_labels];
- return;
- } /* if we find it */
- } /* for each existing label */
+ 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. */
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)
return (fb_low_counter[label]);
}
- for (i = fb_labels + FB_LABEL_SPECIAL; i < fb_labels + fb_label_count; ++i)
+ if (fb_labels != NULL)
{
- if (*i == label)
+ for (i = fb_labels + FB_LABEL_SPECIAL;
+ i < fb_labels + fb_label_count; ++i)
{
- return (fb_label_instances[i - fb_labels]);
- } /* if we find it */
- } /* for each existing label */
+ if (*i == label)
+ {
+ return (fb_label_instances[i - fb_labels]);
+ } /* if we find it */
+ } /* for each existing label */
+ }
- /* NOTREACHED */
- know (0);
-} /* fb_label_instance() */
+ /* We didn't find the label, so this must be a reference to the
+ first instance. */
+ return 0;
+}
/*
* 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.
+ * 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.
- */
+ * 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)
return (symbol_decode);
} /* decode_local_label_name() */
+/* Get the value of a symbol. */
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
+valueT
+S_GET_VALUE (s)
+ symbolS *s;
+{
+ if (s->sy_value.X_op != O_constant)
+ as_bad ("Attempt to get value of unresolved symbol %s", S_GET_NAME (s));
+ return (valueT) s->sy_value.X_add_number;
+}
+
+/* Set the value of a symbol. */
+
+void
+S_SET_VALUE (s, val)
+ symbolS *s;
+ valueT val;
+{
+ s->sy_value.X_op = O_constant;
+ s->sy_value.X_add_number = (offsetT) val;
+ s->sy_value.X_unsigned = 0;
+}
+
+#ifdef BFD_ASSEMBLER
+
+int
+S_IS_EXTERNAL (s)
+ symbolS *s;
+{
+ flagword flags = s->bsym->flags;
+
+ /* sanity check */
+ if (flags & BSF_LOCAL && flags & BSF_GLOBAL)
+ abort ();
+
+ return (flags & BSF_GLOBAL) != 0;
+}
+
+int
+S_IS_COMMON (s)
+ symbolS *s;
+{
+ return bfd_is_com_section (s->bsym->section);
+}
+
+int
+S_IS_DEFINED (s)
+ symbolS *s;
+{
+ return s->bsym->section != undefined_section;
+}
+
+int
+S_IS_DEBUG (s)
+ symbolS *s;
+{
+ if (s->bsym->flags & BSF_DEBUGGING)
+ return 1;
+ return 0;
+}
+
+int
+S_IS_LOCAL (s)
+ symbolS *s;
+{
+ flagword flags = s->bsym->flags;
+
+ /* sanity check */
+ if (flags & BSF_LOCAL && flags & BSF_GLOBAL)
+ abort ();
+
+ 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'])));
+}
+
+int
+S_IS_EXTERN (s)
+ symbolS *s;
+{
+ return S_IS_EXTERNAL (s);
+}
+
+int
+S_IS_STABD (s)
+ symbolS *s;
+{
+ return S_GET_NAME (s) == 0;
+}
+
+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_SEGMENT (s, seg)
+ symbolS *s;
+ segT seg;
+{
+ s->bsym->section = seg;
+}
+
+void
+S_SET_EXTERNAL (s)
+ symbolS *s;
+{
+ s->bsym->flags |= BSF_GLOBAL;
+ s->bsym->flags &= ~(BSF_LOCAL|BSF_WEAK);
+}
+
+void
+S_CLEAR_EXTERNAL (s)
+ symbolS *s;
+{
+ s->bsym->flags |= BSF_LOCAL;
+ s->bsym->flags &= ~(BSF_GLOBAL|BSF_WEAK);
+}
+
+void
+S_SET_WEAK (s)
+ symbolS *s;
+{
+ s->bsym->flags |= BSF_WEAK;
+ s->bsym->flags &= ~(BSF_GLOBAL|BSF_LOCAL);
+}
+
+void
+S_SET_NAME (s, name)
+ symbolS *s;
+ char *name;
+{
+ s->bsym->name = name;
+}
+#endif /* BFD_ASSEMBLER */
+
+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 */
+}
/* end of symbols.c */
projects / binutils.git / blobdiff