/* symbols.c -symbol table-
- Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
+ Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001
+ Free Software Foundation, Inc.
-This file is part of GAS, the GNU Assembler.
+ 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 1, or (at your option)
-any later version.
+ 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.
+ 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. */
+ 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, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
-/* static const char rcsid[] = "$Id$"; */
+/* #define DEBUG_SYMS / * to debug symbol list maintenance. */
#include "as.h"
+#include "safe-ctype.h"
#include "obstack.h" /* For "symbols.h" */
#include "subsegs.h"
+#include "struc-symbol.h"
+
+/* This is non-zero if symbols are case sensitive, which is the
+ default. */
+int symbols_case_sensitive = 1;
+
#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;
+
+/* Table of local symbols. */
+static struct hash_control *local_hash;
- /* Below are commented in "symbols.h". */
-unsigned int local_bss_counter;
-symbolS * symbol_rootP;
-symbolS * symbol_lastP;
-symbolS abs_symbol;
+/* 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;
+#ifdef DEBUG_SYMS
+#define debug_verify_symchain verify_symbol_chain
+#else
+#define debug_verify_symchain(root, last) ((void) 0)
+#endif
-struct obstack notes;
+#define DOLLAR_LABEL_CHAR '\001'
+#define LOCAL_LABEL_CHAR '\002'
-/*
- * Un*x 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:.
- *
- * Like Un*x AS, 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.
- *
- * I document the symbol names here to save duplicating words elsewhere.
- * The mth occurence of label n: is turned into the symbol "Ln^Am" where
- * n is a digit and m is a decimal 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.
- */
+struct obstack notes;
-typedef short unsigned int
-local_label_countT;
+static char *save_symbol_name PARAMS ((const char *));
+static void fb_label_init PARAMS ((void));
+static long dollar_label_instance PARAMS ((long));
+static long fb_label_instance PARAMS ((long));
-static local_label_countT
-local_label_counter[10];
+static void print_binary PARAMS ((FILE *, const char *, expressionS *));
-static /* Returned to caller, then copied. */
- char symbol_name_build[12]; /* used for created names ("4f") */
+/* 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.
-#ifdef LOCAL_LABELS_DOLLAR
-int local_label_defined[10];
-#endif
+ This function should be called in the general case of creating a
+ symbol. However, if the output file symbol table has already been
+ set, and you are certain that this symbol won't be wanted in the
+ output file, you can call symbol_create. */
-\f
-void
-symbol_begin()
+symbolS *
+symbol_new (name, segment, valu, frag)
+ const char *name;
+ segT segment;
+ valueT valu;
+ fragS *frag;
{
- symbol_lastP = NULL;
- symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
- sy_hash = hash_new();
- bzero ((char *)(& abs_symbol), sizeof(abs_symbol));
- S_SET_SEGMENT(&abs_symbol, SEG_ABSOLUTE); /* Can't initialise a union. Sigh. */
- bzero ((char *)(local_label_counter), sizeof(local_label_counter) );
- local_bss_counter = 0;
+ symbolS *symbolP = symbol_create (name, segment, valu, frag);
+
+ /* Link to end of symbol chain. */
+#ifdef BFD_ASSEMBLER
+ {
+ extern int symbol_table_frozen;
+ if (symbol_table_frozen)
+ abort ();
+ }
+#endif
+ symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
+
+ return symbolP;
}
-\f
-/*
- * local_label_name()
- *
- * Caller must copy returned name: we re-use the area for the next name.
- */
-
-char * /* Return local label name. */
-local_label_name(n, augend)
- register int n; /* we just saw "n:", "nf" or "nb" : n a digit */
- register int augend; /* 0 for nb, 1 for n:, nf */
-{
- register char * p;
- register char * q;
- char symbol_name_temporary[10]; /* build up a number, BACKWARDS */
-
- know( n >= 0 );
- know( augend == 0 || augend == 1 );
- p = symbol_name_build;
- * p ++ = 'L';
- * p ++ = n + '0'; /* Make into ASCII */
- * p ++ = 1; /* ^A */
- n = local_label_counter [ n ] + augend;
- /* version number of this local label */
- /*
- * Next code just does sprintf( {}, "%d", n);
- * It is more elegant to do the next part recursively, but a procedure
- * call for each digit emitted is considered too costly.
- */
- q = symbol_name_temporary;
- for (*q++=0; n; q++) /* emits NOTHING if n starts as 0 */
+
+/* Save a symbol name on a permanent obstack, and convert it according
+ to the object file format. */
+
+static char *
+save_symbol_name (name)
+ const char *name;
+{
+ unsigned int name_length;
+ char *ret;
+
+ name_length = strlen (name) + 1; /* +1 for \0. */
+ obstack_grow (¬es, name, name_length);
+ ret = obstack_finish (¬es);
+
+#ifdef STRIP_UNDERSCORE
+ if (ret[0] == '_')
+ ++ret;
+#endif
+
+#ifdef tc_canonicalize_symbol_name
+ ret = tc_canonicalize_symbol_name (ret);
+#endif
+
+ if (! symbols_case_sensitive)
{
- know(n>0); /* We expect n > 0 always */
- *q = n % 10 + '0';
- n /= 10;
- }
- while (( * p ++ = * -- q ) != '\0') ;;
+ char *s;
- /* The label, as a '\0' ended string, starts at symbol_name_build. */
- return(symbol_name_build);
-} /* local_label_name() */
+ for (s = ret; *s != '\0'; s++)
+ *s = TOUPPER (*s);
+ }
+ return ret;
+}
-void local_colon (n)
-int n; /* just saw "n:" */
+symbolS *
+symbol_create (name, segment, valu, frag)
+ const char *name; /* It is copied, the caller can destroy/modify. */
+ segT segment; /* Segment identifier (SEG_<something>). */
+ valueT valu; /* Symbol value. */
+ fragS *frag; /* Associated fragment. */
{
- local_label_counter [n] ++;
-#ifdef LOCAL_LABELS_DOLLAR
- local_label_defined[n]=1;
+ char *preserved_copy_of_name;
+ symbolS *symbolP;
+
+ preserved_copy_of_name = save_symbol_name (name);
+
+ 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);
+ if (symbolP->bsym == NULL)
+ as_perror ("%s", "bfd_make_empty_symbol");
+ symbolP->bsym->udata.p = (PTR) symbolP;
+#endif
+ S_SET_NAME (symbolP, preserved_copy_of_name);
+
+ S_SET_SEGMENT (symbolP, segment);
+ S_SET_VALUE (symbolP, valu);
+ symbol_clear_list_pointers (symbolP);
+
+ symbolP->sy_frag = frag;
+#ifndef BFD_ASSEMBLER
+ symbolP->sy_number = ~0;
+ symbolP->sy_name_offset = (unsigned int) ~0;
+#endif
+
+ obj_symbol_new_hook (symbolP);
+
+#ifdef tc_symbol_new_hook
+ tc_symbol_new_hook (symbolP);
#endif
- colon (local_label_name (n, 0));
+
+ return symbolP;
}
\f
-/*
- * 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)
-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);
- symbolP = (symbolS *)obstack_alloc(¬es, sizeof(symbolS));
-
-#if STRIP_UNDERSCORE
- S_SET_NAME(symbolP, (*preserved_copy_of_name == '_'
- ? preserved_copy_of_name + 1
- : preserved_copy_of_name));
-#else /* STRIP_UNDERSCORE */
- S_SET_NAME(symbolP, preserved_copy_of_name);
-#endif /* STRIP_UNDERSCORE */
+#ifdef BFD_ASSEMBLER
+
+/* Local symbol support. If we can get away with it, we keep only a
+ small amount of information for local symbols. */
+
+static struct local_symbol *local_symbol_make PARAMS ((const char *, segT,
+ valueT, fragS *));
+static symbolS *local_symbol_convert PARAMS ((struct local_symbol *));
+
+/* Used for statistics. */
+
+static unsigned long local_symbol_count;
+static unsigned long local_symbol_conversion_count;
+
+/* This macro is called with a symbol argument passed by reference.
+ It returns whether this is a local symbol. If necessary, it
+ changes its argument to the real symbol. */
+
+#define LOCAL_SYMBOL_CHECK(s) \
+ (s->bsym == NULL \
+ ? (local_symbol_converted_p ((struct local_symbol *) s) \
+ ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \
+ 0) \
+ : 1) \
+ : 0)
+
+/* Create a local symbol and insert it into the local hash table. */
+
+static struct local_symbol *
+local_symbol_make (name, section, value, frag)
+ const char *name;
+ segT section;
+ valueT value;
+ fragS *frag;
+{
+ char *name_copy;
+ struct local_symbol *ret;
+
+ ++local_symbol_count;
+
+ name_copy = save_symbol_name (name);
+
+ ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret);
+ ret->lsy_marker = NULL;
+ ret->lsy_name = name_copy;
+ ret->lsy_section = section;
+ local_symbol_set_frag (ret, frag);
+ ret->lsy_value = value;
+
+ hash_jam (local_hash, name_copy, (PTR) ret);
+
+ return ret;
+}
+
+/* Convert a local symbol into a real symbol. Note that we do not
+ reclaim the space used by the local symbol. */
+
+static symbolS *
+local_symbol_convert (locsym)
+ struct local_symbol *locsym;
+{
+ symbolS *ret;
+
+ assert (locsym->lsy_marker == NULL);
+ if (local_symbol_converted_p (locsym))
+ return local_symbol_get_real_symbol (locsym);
+
+ ++local_symbol_conversion_count;
+
+ ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value,
+ local_symbol_get_frag (locsym));
+
+ if (local_symbol_resolved_p (locsym))
+ ret->sy_resolved = 1;
+
+ /* Local symbols are always either defined or used. */
+ ret->sy_used = 1;
+
+#ifdef TC_LOCAL_SYMFIELD_CONVERT
+ TC_LOCAL_SYMFIELD_CONVERT (locsym, ret);
+#endif
+
+ symbol_table_insert (ret);
- S_SET_SEGMENT(symbolP, segment);
- S_SET_VALUE(symbolP, value);
- symbol_clear_list_pointers(symbolP);
+ local_symbol_mark_converted (locsym);
+ local_symbol_set_real_symbol (locsym, ret);
- symbolP->sy_frag = frag;
- symbolP->sy_forward = NULL; /* JF */
- symbolP->sy_number = ~0;
- symbolP->sy_name_offset = ~0;
+ hash_jam (local_hash, locsym->lsy_name, NULL);
- /*
- * Link to end of symbol chain.
- */
- symbol_append(symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
+ return ret;
+}
- obj_symbol_new_hook(symbolP);
-
-#ifdef DEBUG
- verify_symbol_chain(symbol_rootP, symbol_lastP);
-#endif /* DEBUG */
+#else /* ! BFD_ASSEMBLER */
- return(symbolP);
-} /* symbol_new() */
+#define LOCAL_SYMBOL_CHECK(s) 0
+#define local_symbol_convert(s) ((symbolS *) s)
+#endif /* ! BFD_ASSEMBLER */
\f
-/*
- * 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. */
+/* We have just seen "<name>:".
+ Creates a struct symbol unless it already exists.
+
+ Gripes if we are redefining a symbol incompatibly (and ignores it). */
+
+symbolS *
+colon (sym_name) /* Just seen "x:" - rattle symbols & frags. */
+ const 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 */
+ 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 (LOCAL_LABELS_DOLLAR)
+ {
+ int local;
- if(*sym_name !='L')
- bzero((void *) local_label_defined, sizeof(local_label_defined));
+#ifdef BFD_ASSEMBLER
+ local = bfd_is_local_label_name (stdoutput, sym_name);
+#else
+ local = LOCAL_LABEL (sym_name);
#endif
+ if (! local)
+ dollar_label_clear ();
+ }
+
#ifndef WORKING_DOT_WORD
- if(new_broken_words) {
- struct broken_word *a;
- int possible_bytes;
- 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;
- 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;
- }
+ 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,
+ (offsetT) 0,
+ 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 symbolP;
#endif
- 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))
- return;
- /*
- * 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
- */
- if (!S_IS_DEFINED(symbolP)) {
- if (S_GET_VALUE(symbolP) == 0) {
- symbolP->sy_frag = frag_now;
-#ifdef VMS
- symbolP->sy_other = const_flag;
-#endif
- S_SET_VALUE(symbolP, obstack_next_free(&frags) - frag_now->fr_literal);
- S_SET_SEGMENT(symbolP, now_seg);
+ /* Now check for undefined symbols. */
+ if (LOCAL_SYMBOL_CHECK (symbolP))
+ {
+#ifdef BFD_ASSEMBLER
+ struct local_symbol *locsym = (struct local_symbol *) symbolP;
+
+ if (locsym->lsy_section != undefined_section
+ && (local_symbol_get_frag (locsym) != frag_now
+ || locsym->lsy_section != now_seg
+ || locsym->lsy_value != frag_now_fix ()))
+ {
+ as_bad (_("symbol `%s' is already defined"), sym_name);
+ return symbolP;
+ }
+
+ locsym->lsy_section = now_seg;
+ local_symbol_set_frag (locsym, frag_now);
+ locsym->lsy_value = frag_now_fix ();
+#endif
+ }
+ else if (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP))
+ {
+ if (S_GET_VALUE (symbolP) == 0)
+ {
+ symbolP->sy_frag = frag_now;
+#ifdef OBJ_VMS
+ S_SET_OTHER (symbolP, const_flag);
+#endif
+ S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
+ 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.
- */
- char New_Type = SEGMENT_TO_SYMBOL_TYPE((int) now_seg);
-
- 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)))) {
- /*
- * Select which of the 2 cases this is
- */
- if (now_seg != SEG_DATA) {
- /*
- * 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))) {
- S_SET_VALUE(symbolP,
- obstack_next_free(& frags) -
- frag_now->fr_literal);
- }
- } else {
- /*
- * 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);
- S_SET_SEGMENT(symbolP, now_seg); /* keep N_EXT bit */
- }
- } else {
-#ifdef OBJ_COFF
- as_fatal("Symbol \"%s\" is already defined as \"%s\"/%d.",
- 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.",
- sym_name,
- segment_name(S_GET_SEGMENT(symbolP)),
- S_GET_OTHER(symbolP), S_GET_DESC(symbolP),
- S_GET_VALUE(symbolP));
-#endif /* OBJ_COFF */
- }
- } /* if the undefined symbol has no value */
- } else {
- 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 VMS
- S_SET_OTHER(symbolP, const_flag);
-#endif /* VMS */
-
- symbol_table_insert(symbolP);
- } /* if we have seen this symbol before */
-
- return;
-} /* colon() */
+ 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_COMMON (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, (valueT) frag_now_fix ());
+ }
+ }
+ else
+ {
+ /* It is a .comm/.lcomm being converted to initialized
+ data. */
+ symbolP->sy_frag = frag_now;
+#ifdef OBJ_VMS
+ S_SET_OTHER (symbolP, const_flag);
+#endif
+ S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
+ S_SET_SEGMENT (symbolP, now_seg); /* Keep N_EXT bit. */
+ }
+ }
+ else
+ {
+#if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \
+ && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT))
+ static const char *od_buf = "";
+#else
+ char od_buf[100];
+ od_buf[0] = '\0';
+#ifdef BFD_ASSEMBLER
+ if (OUTPUT_FLAVOR == bfd_target_aout_flavour)
+#endif
+ sprintf(od_buf, "%d.%d.",
+ S_GET_OTHER (symbolP),
+ S_GET_DESC (symbolP));
+#endif
+ as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"),
+ sym_name,
+ segment_name (S_GET_SEGMENT (symbolP)),
+ od_buf,
+ (long) S_GET_VALUE (symbolP));
+ }
+ } /* 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) == frag_now_fix ()
+ && S_GET_SEGMENT (symbolP) == now_seg))
+ as_bad (_("symbol `%s' is already defined"), sym_name);
+ }
+
+ }
+#ifdef BFD_ASSEMBLER
+ else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name))
+ {
+ symbolP = (symbolS *) local_symbol_make (sym_name, now_seg,
+ (valueT) frag_now_fix (),
+ frag_now);
+ }
+#endif /* BFD_ASSEMBLER */
+ else
+ {
+ symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (),
+ frag_now);
+#ifdef OBJ_VMS
+ S_SET_OTHER (symbolP, const_flag);
+#endif /* OBJ_VMS */
+
+ symbol_table_insert (symbolP);
+ }
+
+ if (mri_common_symbol != NULL)
+ {
+ /* This symbol is actually being defined within an MRI common
+ section. This requires special handling. */
+ if (LOCAL_SYMBOL_CHECK (symbolP))
+ symbolP = local_symbol_convert ((struct local_symbol *) symbolP);
+ symbolP->sy_value.X_op = O_symbol;
+ symbolP->sy_value.X_add_symbol = mri_common_symbol;
+ symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol);
+ symbolP->sy_frag = &zero_address_frag;
+ S_SET_SEGMENT (symbolP, expr_section);
+ symbolP->sy_mri_common = 1;
+ }
+
+#ifdef tc_frob_label
+ tc_frob_label (symbolP);
+#endif
+#ifdef obj_frob_label
+ obj_frob_label (symbolP);
+#endif
+ return symbolP;
+}
\f
-/*
- * 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() */
+/* Die if we can't insert the symbol. */
+
+void
+symbol_table_insert (symbolP)
+ symbolS *symbolP;
+{
+ register const char *error_string;
+
+ know (symbolP);
+ know (S_GET_NAME (symbolP));
+
+ if (LOCAL_SYMBOL_CHECK (symbolP))
+ {
+ error_string = hash_jam (local_hash, S_GET_NAME (symbolP),
+ (PTR) symbolP);
+ if (error_string != NULL)
+ as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
+ S_GET_NAME (symbolP), error_string);
+ return;
+ }
+
+ 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);
+ } /* on error */
+}
\f
-/*
- * 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)
-char *name;
-{
- symbolS *symbolP;
-
- /* Let the machine description default it, e.g. for register names. */
- symbolP = md_undefined_symbol(name);
-
- if (!symbolP) {
- symbolP = symbol_new(name,
- SEG_UNKNOWN,
- 0,
- &zero_address_frag);
- } /* if md didn't build us a symbol */
-
- 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)
-char *name;
-{
-#ifndef STRIP_UNDERSCORE
-#define STRIP_UNDERSCORE 0
+/* 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)
+ const char *name;
+{
+ register symbolS *symbolP;
+
+ symbolP = symbol_find (name);
+
+ if (symbolP == NULL)
+ {
+#ifdef BFD_ASSEMBLER
+ if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name))
+ {
+ symbolP = md_undefined_symbol ((char *) name);
+ if (symbolP != NULL)
+ return symbolP;
+
+ symbolP = (symbolS *) local_symbol_make (name, undefined_section,
+ (valueT) 0,
+ &zero_address_frag);
+ return symbolP;
+ }
+#endif
+
+ symbolP = symbol_make (name);
+
+ symbol_table_insert (symbolP);
+ } /* if symbol wasn't found */
+
+ return (symbolP);
+}
+
+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, (valueT) 0, &zero_address_frag);
+
+ return (symbolP);
+}
+
+/* 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 */
- return symbol_find_base(name, STRIP_UNDERSCORE);
}
-symbolS *symbol_find_base(name, strip_underscore)
-char *name;
-int strip_underscore;
+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 ));
+ if (strip_underscore && *name == '_')
+ name++;
+
+#ifdef tc_canonicalize_symbol_name
+ {
+ char *copy;
+ size_t len = strlen (name) + 1;
+
+ copy = (char *) alloca (len);
+ memcpy (copy, name, len);
+ name = tc_canonicalize_symbol_name (copy);
+ }
+#endif
+
+ if (! symbols_case_sensitive)
+ {
+ char *copy;
+ const char *orig;
+ unsigned char c;
+
+ orig = name;
+ name = copy = (char *) alloca (strlen (name) + 1);
+
+ while ((c = *orig++) != '\0')
+ {
+ *copy++ = TOUPPER (c);
+ }
+ *copy = '\0';
+ }
+
+#ifdef BFD_ASSEMBLER
+ {
+ struct local_symbol *locsym;
+
+ locsym = (struct local_symbol *) hash_find (local_hash, name);
+ if (locsym != NULL)
+ return (symbolS *) locsym;
+ }
+#endif
+
+ 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.
- */
+/* 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. */
-/* Link symbol ADDME after symbol TARGET in the chain. */
-void symbol_append(addme, target, rootPP, lastPP)
-symbolS *addme;
-symbolS *target;
-symbolS **rootPP;
-symbolS **lastPP;
+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 (LOCAL_SYMBOL_CHECK (addme))
+ abort ();
+ if (target != NULL && LOCAL_SYMBOL_CHECK (target))
+ abort ();
+
+ if (target == NULL)
+ {
+ know (*rootPP == NULL);
+ know (*lastPP == NULL);
+ addme->sy_next = NULL;
+#ifdef SYMBOLS_NEED_BACKPOINTERS
+ addme->sy_previous = NULL;
+#endif
+ *rootPP = addme;
+ *lastPP = addme;
+ return;
+ } /* if the list is empty */
- if (target->sy_next != NULL) {
+ if (target->sy_next != NULL)
+ {
#ifdef SYMBOLS_NEED_BACKPOINTERS
- target->sy_next->sy_previous = addme;
+ 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;
+ }
+ 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;
+ addme->sy_previous = target;
#endif /* SYMBOLS_NEED_BACKPOINTERS */
-#ifdef DEBUG
- verify_symbol_chain(*rootPP, *lastPP);
-#endif /* DEBUG */
+ debug_verify_symchain (symbol_rootP, symbol_lastP);
+}
- return;
-} /* symbol_append() */
+/* Set the chain pointers of SYMBOL to null. */
+void
+symbol_clear_list_pointers (symbolP)
+ symbolS *symbolP;
+{
+ if (LOCAL_SYMBOL_CHECK (symbolP))
+ abort ();
+ symbolP->sy_next = NULL;
#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 */
+ symbolP->sy_previous = NULL;
+#endif
+}
- return;
-} /* symbol_remove() */
-
-/* Set the chain pointers of SYMBOL to null. */
-void symbol_clear_list_pointers(symbolP)
-symbolS *symbolP;
-{
- symbolP->sy_next = NULL;
- symbolP->sy_previous = NULL;
-} /* symbol_clear_list_pointers() */
-
-/* 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 */
+#ifdef SYMBOLS_NEED_BACKPOINTERS
+/* Remove SYMBOLP from the list. */
+
+void
+symbol_remove (symbolP, rootPP, lastPP)
+ symbolS *symbolP;
+ symbolS **rootPP;
+ symbolS **lastPP;
+{
+ if (LOCAL_SYMBOL_CHECK (symbolP))
+ abort ();
+
+ 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 */
+
+ debug_verify_symchain (*rootPP, *lastPP);
+}
+
+/* Link symbol ADDME before symbol TARGET in the chain. */
+
+void
+symbol_insert (addme, target, rootPP, lastPP)
+ symbolS *addme;
+ symbolS *target;
+ symbolS **rootPP;
+ symbolS **lastPP ATTRIBUTE_UNUSED;
+{
+ if (LOCAL_SYMBOL_CHECK (addme))
+ abort ();
+ if (LOCAL_SYMBOL_CHECK (target))
+ abort ();
+
+ 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;
+
+ debug_verify_symchain (*rootPP, *lastPP);
+}
- return;
-} /* symbol_insert() */
#endif /* SYMBOLS_NEED_BACKPOINTERS */
-void verify_symbol_chain(rootP, lastP)
-symbolS *rootP;
-symbolS *lastP;
+void
+verify_symbol_chain (rootP, lastP)
+ symbolS *rootP;
+ symbolS *lastP;
{
- symbolS *symbolP = rootP;
+ symbolS *symbolP = rootP;
- if (symbolP == NULL) {
- return;
- } /* empty chain */
+ if (symbolP == NULL)
+ return;
- for ( ; symbol_next(symbolP) != NULL; symbolP = symbol_next(symbolP)) {
+ for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
+ {
+#ifdef BFD_ASSEMBLER
+ assert (symbolP->bsym != NULL);
+#endif
#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 */
- ;
+ assert (symbolP->sy_next->sy_previous == symbolP);
+#else
+ /* Walk the list anyways, to make sure pointers are still good. */
+ ;
#endif /* SYMBOLS_NEED_BACKPOINTERS */
- } /* verify pointers */
+ }
- know(lastP == symbolP);
+ assert (lastP == symbolP);
+}
- return;
-} /* verify_symbol_chain() */
+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. */
+
+valueT
+resolve_symbol_value (symp)
+ symbolS *symp;
+{
+ int resolved;
+ valueT final_val;
+ segT final_seg;
+
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (symp))
+ {
+ struct local_symbol *locsym = (struct local_symbol *) symp;
+
+ final_val = locsym->lsy_value;
+ if (local_symbol_resolved_p (locsym))
+ return final_val;
+
+ final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE;
+
+ if (finalize_syms)
+ {
+ locsym->lsy_value = final_val;
+ local_symbol_mark_resolved (locsym);
+ }
+
+ return final_val;
+ }
+#endif
+
+ if (symp->sy_resolved)
+ {
+ if (symp->sy_value.X_op == O_constant)
+ return (valueT) symp->sy_value.X_add_number;
+ else
+ return 0;
+ }
+
+ resolved = 0;
+ final_seg = S_GET_SEGMENT (symp);
+
+ if (symp->sy_resolving)
+ {
+ if (finalize_syms)
+ as_bad (_("symbol definition loop encountered at `%s'"),
+ S_GET_NAME (symp));
+ final_val = 0;
+ resolved = 1;
+ }
+ else
+ {
+ symbolS *add_symbol, *op_symbol;
+ offsetT left, right;
+ segT seg_left, seg_right;
+ operatorT op;
+
+ symp->sy_resolving = 1;
+
+ /* Help out with CSE. */
+ add_symbol = symp->sy_value.X_add_symbol;
+ op_symbol = symp->sy_value.X_op_symbol;
+ final_val = symp->sy_value.X_add_number;
+ op = symp->sy_value.X_op;
+
+ switch (op)
+ {
+ default:
+ BAD_CASE (op);
+ break;
+
+ case O_absent:
+ final_val = 0;
+ /* Fall through. */
+
+ case O_constant:
+ final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
+ if (final_seg == expr_section)
+ final_seg = absolute_section;
+ resolved = 1;
+ break;
+
+ case O_symbol:
+ case O_symbol_rva:
+ left = resolve_symbol_value (add_symbol);
+ seg_left = S_GET_SEGMENT (add_symbol);
+ if (finalize_syms)
+ symp->sy_value.X_op_symbol = NULL;
+
+ do_symbol:
+ if (symp->sy_mri_common)
+ {
+ /* This is a symbol inside an MRI common section. The
+ relocation routines are going to handle it specially.
+ Don't change the value. */
+ resolved = symbol_resolved_p (add_symbol);
+ break;
+ }
+
+ if (finalize_syms && final_val == 0)
+ {
+ if (LOCAL_SYMBOL_CHECK (add_symbol))
+ add_symbol = local_symbol_convert ((struct local_symbol *)
+ add_symbol);
+ copy_symbol_attributes (symp, add_symbol);
+ }
+
+ /* If we have equated this symbol to an undefined or common
+ symbol, keep X_op set to O_symbol, and don't change
+ X_add_number. This permits the routine which writes out
+ relocation to detect this case, and convert the
+ relocation to be against the symbol to which this symbol
+ is equated. */
+ if (! S_IS_DEFINED (add_symbol) || S_IS_COMMON (add_symbol))
+ {
+ if (finalize_syms)
+ {
+ symp->sy_value.X_op = O_symbol;
+ symp->sy_value.X_add_symbol = add_symbol;
+ symp->sy_value.X_add_number = final_val;
+ /* Use X_op_symbol as a flag. */
+ symp->sy_value.X_op_symbol = add_symbol;
+ final_seg = seg_left;
+ }
+ final_val = 0;
+ resolved = symbol_resolved_p (add_symbol);
+ symp->sy_resolving = 0;
+ goto exit_dont_set_value;
+ }
+ else if (finalize_syms && final_seg == expr_section
+ && seg_left != expr_section)
+ {
+ /* If the symbol is an expression symbol, do similarly
+ as for undefined and common syms above. Handles
+ "sym +/- expr" where "expr" cannot be evaluated
+ immediately, and we want relocations to be against
+ "sym", eg. because it is weak. */
+ symp->sy_value.X_op = O_symbol;
+ symp->sy_value.X_add_symbol = add_symbol;
+ symp->sy_value.X_add_number = final_val;
+ symp->sy_value.X_op_symbol = add_symbol;
+ final_seg = seg_left;
+ final_val += symp->sy_frag->fr_address + left;
+ resolved = symbol_resolved_p (add_symbol);
+ symp->sy_resolving = 0;
+ goto exit_dont_set_value;
+ }
+ else
+ {
+ final_val += symp->sy_frag->fr_address + left;
+ if (final_seg == expr_section || final_seg == undefined_section)
+ final_seg = seg_left;
+ }
+
+ resolved = symbol_resolved_p (add_symbol);
+ break;
+
+ case O_uminus:
+ case O_bit_not:
+ case O_logical_not:
+ left = resolve_symbol_value (add_symbol);
+ seg_left = S_GET_SEGMENT (add_symbol);
+
+ if (op == O_uminus)
+ left = -left;
+ else if (op == O_logical_not)
+ left = !left;
+ else
+ left = ~left;
+
+ final_val += left + symp->sy_frag->fr_address;
+ if (final_seg == expr_section || final_seg == undefined_section)
+ final_seg = seg_left;
+
+ resolved = symbol_resolved_p (add_symbol);
+ 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:
+ case O_eq:
+ case O_ne:
+ case O_lt:
+ case O_le:
+ case O_ge:
+ case O_gt:
+ case O_logical_and:
+ case O_logical_or:
+ left = resolve_symbol_value (add_symbol);
+ right = resolve_symbol_value (op_symbol);
+ seg_left = S_GET_SEGMENT (add_symbol);
+ seg_right = S_GET_SEGMENT (op_symbol);
+
+ /* Simplify addition or subtraction of a constant by folding the
+ constant into X_add_number. */
+ if (op == O_add)
+ {
+ if (seg_right == absolute_section)
+ {
+ final_val += right;
+ goto do_symbol;
+ }
+ else if (seg_left == absolute_section)
+ {
+ final_val += left;
+ add_symbol = op_symbol;
+ left = right;
+ seg_left = seg_right;
+ goto do_symbol;
+ }
+ }
+ else if (op == O_subtract)
+ {
+ if (seg_right == absolute_section)
+ {
+ final_val -= right;
+ goto do_symbol;
+ }
+ }
+
+ /* Equality and non-equality tests are permitted on anything.
+ Subtraction, and other comparison operators are permitted if
+ both operands are in the same section. Otherwise, both
+ operands must be absolute. We already handled the case of
+ addition or subtraction of a constant above. This will
+ probably need to be changed for an object file format which
+ supports arbitrary expressions, such as IEEE-695.
+
+ Don't emit messages unless we're finalizing the symbol value,
+ otherwise we may get the same message multiple times. */
+ if ((op == O_eq || op == O_ne)
+ || ((op == O_subtract
+ || op == O_lt || op == O_le || op == O_ge || op == O_gt)
+ && seg_left == seg_right
+ && (seg_left != undefined_section
+ || add_symbol == op_symbol))
+ || (seg_left == absolute_section
+ && seg_right == absolute_section))
+ {
+ if (final_seg == expr_section || final_seg == undefined_section)
+ final_seg = absolute_section;
+ }
+ else if (finalize_syms)
+ {
+ char *file;
+ unsigned int line;
+
+ if (expr_symbol_where (symp, &file, &line))
+ {
+ if (seg_left == undefined_section)
+ as_bad_where (file, line,
+ _("undefined symbol `%s' in operation"),
+ S_GET_NAME (symp->sy_value.X_add_symbol));
+ if (seg_right == undefined_section)
+ as_bad_where (file, line,
+ _("undefined symbol `%s' in operation"),
+ S_GET_NAME (symp->sy_value.X_op_symbol));
+ if (seg_left != undefined_section
+ && seg_right != undefined_section)
+ as_bad_where (file, line,
+ _("invalid section for operation"));
+ }
+ else
+ {
+ if (seg_left == undefined_section)
+ as_bad (_("undefined symbol `%s' in operation setting `%s'"),
+ S_GET_NAME (symp->sy_value.X_add_symbol),
+ S_GET_NAME (symp));
+ if (seg_right == undefined_section)
+ as_bad (_("undefined symbol `%s' in operation setting `%s'"),
+ S_GET_NAME (symp->sy_value.X_op_symbol),
+ S_GET_NAME (symp));
+ if (seg_left != undefined_section
+ && seg_right != undefined_section)
+ as_bad (_("invalid section for operation setting `%s'"),
+ S_GET_NAME (symp));
+ }
+ /* Prevent the error propagating. */
+ if (final_seg == expr_section || final_seg == undefined_section)
+ final_seg = absolute_section;
+ }
+
+ /* Check for division by zero. */
+ if ((op == O_divide || op == O_modulus) && right == 0)
+ {
+ /* If seg_right is not absolute_section, then we've
+ already issued a warning about using a bad symbol. */
+ if (seg_right == absolute_section && finalize_syms)
+ {
+ char *file;
+ unsigned int line;
+
+ if (expr_symbol_where (symp, &file, &line))
+ as_bad_where (file, line, _("division by zero"));
+ else
+ as_bad (_("division by zero when setting `%s'"),
+ S_GET_NAME (symp));
+ }
+
+ right = 1;
+ }
+
+ switch (symp->sy_value.X_op)
+ {
+ case O_multiply: left *= right; break;
+ case O_divide: left /= right; break;
+ case O_modulus: left %= right; break;
+ case O_left_shift: left <<= right; break;
+ case O_right_shift: left >>= right; break;
+ case O_bit_inclusive_or: left |= right; break;
+ case O_bit_or_not: left |= ~right; break;
+ case O_bit_exclusive_or: left ^= right; break;
+ case O_bit_and: left &= right; break;
+ case O_add: left += right; break;
+ case O_subtract: left -= right; break;
+ case O_eq:
+ case O_ne:
+ left = (left == right && seg_left == seg_right
+ && (seg_left != undefined_section
+ || add_symbol == op_symbol)
+ ? ~ (offsetT) 0 : 0);
+ if (symp->sy_value.X_op == O_ne)
+ left = ~left;
+ break;
+ case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break;
+ case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break;
+ case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break;
+ case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break;
+ case O_logical_and: left = left && right; break;
+ case O_logical_or: left = left || right; break;
+ default: abort ();
+ }
+
+ final_val += symp->sy_frag->fr_address + left;
+ if (final_seg == expr_section || final_seg == undefined_section)
+ {
+ if (seg_left == undefined_section
+ || seg_right == undefined_section)
+ final_seg = undefined_section;
+ else if (seg_left == absolute_section)
+ final_seg = seg_right;
+ else
+ final_seg = seg_left;
+ }
+ resolved = (symbol_resolved_p (add_symbol)
+ && symbol_resolved_p (op_symbol));
+ 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;
+ }
+
+ symp->sy_resolving = 0;
+ }
+
+ if (finalize_syms)
+ S_SET_VALUE (symp, final_val);
+
+exit_dont_set_value:
+ /* Always set the segment, even if not finalizing the value.
+ The segment is used to determine whether a symbol is defined. */
+#if defined (OBJ_AOUT) && ! defined (BFD_ASSEMBLER)
+ /* The old a.out backend does not handle S_SET_SEGMENT correctly
+ for a stab symbol, so we use this bad hack. */
+ if (final_seg != S_GET_SEGMENT (symp))
+#endif
+ S_SET_SEGMENT (symp, final_seg);
+
+ /* Don't worry if we can't resolve an expr_section symbol. */
+ if (finalize_syms)
+ {
+ 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;
+ }
+ }
+
+ return final_val;
+}
+
+#ifdef BFD_ASSEMBLER
+
+static void resolve_local_symbol PARAMS ((const char *, PTR));
+/* A static function passed to hash_traverse. */
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
+static void
+resolve_local_symbol (key, value)
+ const char *key ATTRIBUTE_UNUSED;
+ PTR value;
+{
+ if (value != NULL)
+ resolve_symbol_value (value);
+}
+
+#endif
+
+/* Resolve all local symbols. */
+
+void
+resolve_local_symbol_values ()
+{
+#ifdef BFD_ASSEMBLER
+ hash_traverse (local_hash, resolve_local_symbol);
+#endif
+}
+
+/* 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 unsigned long dollar_label_count;
+static unsigned 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;
+}
+
+static long
+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', (unsigned int) 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;
+ }
-/* end: symbols.c */
+ /* 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;
+}
+
+/* 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;
+#ifdef LOCAL_LABEL_PREFIX
+ *p++ = LOCAL_LABEL_PREFIX;
+#endif
+ *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++ = DOLLAR_LABEL_CHAR; /* ^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;
+}
+
+/* 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;
+static long fb_label_max;
+
+/* 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));
+}
+
+/* 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;
+ }
+
+ if (fb_labels != NULL)
+ {
+ 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;
+}
+
+static long
+fb_label_instance (label)
+ long label;
+{
+ long *i;
+
+ if (label < FB_LABEL_SPECIAL)
+ {
+ return (fb_low_counter[label]);
+ }
+
+ if (fb_labels != NULL)
+ {
+ 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 */
+ }
+
+ /* We didn't find the label, so this must be a reference to the
+ first instance. */
+ return 0;
+}
+
+/* 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;
+#ifdef LOCAL_LABEL_PREFIX
+ *p++ = LOCAL_LABEL_PREFIX;
+#endif
+ *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++ = LOCAL_LABEL_CHAR; /* ^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);
+}
+
+/* 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;
+ int index = 0;
+
+#ifdef LOCAL_LABEL_PREFIX
+ if (s[index] == LOCAL_LABEL_PREFIX)
+ ++index;
+#endif
+
+ if (s[index] != 'L')
+ return s;
+
+ for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
+ label_number = (10 * label_number) + *p - '0';
+
+ if (*p == DOLLAR_LABEL_CHAR)
+ type = "dollar";
+ else if (*p == LOCAL_LABEL_CHAR)
+ type = "fb";
+ else
+ return s;
+
+ for (instance_number = 0, p++; ISDIGIT (*p); ++p)
+ instance_number = (10 * instance_number) + *p - '0';
+
+ message_format = _("\"%d\" (instance number %d of a %s label)");
+ symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30);
+ sprintf (symbol_decode, message_format, label_number, instance_number, type);
+
+ return symbol_decode;
+}
+
+/* Get the value of a symbol. */
+
+valueT
+S_GET_VALUE (s)
+ symbolS *s;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ return resolve_symbol_value (s);
+#endif
+
+ if (!s->sy_resolved)
+ {
+ valueT val = resolve_symbol_value (s);
+ if (!finalize_syms)
+ return val;
+ }
+ if (s->sy_value.X_op != O_constant)
+ {
+ static symbolS *recur;
+
+ /* FIXME: In non BFD assemblers, S_IS_DEFINED and S_IS_COMMON
+ may call S_GET_VALUE. We use a static symbol to avoid the
+ immediate recursion. */
+ if (recur == s)
+ return (valueT) s->sy_value.X_add_number;
+ recur = s;
+ if (! s->sy_resolved
+ || s->sy_value.X_op != O_symbol
+ || (S_IS_DEFINED (s) && ! S_IS_COMMON (s)))
+ as_bad (_("attempt to get value of unresolved symbol `%s'"),
+ S_GET_NAME (s));
+ recur = NULL;
+ }
+ return (valueT) s->sy_value.X_add_number;
+}
+
+/* Set the value of a symbol. */
+
+void
+S_SET_VALUE (s, val)
+ symbolS *s;
+ valueT val;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ {
+ ((struct local_symbol *) s)->lsy_value = val;
+ return;
+ }
+#endif
+
+ s->sy_value.X_op = O_constant;
+ s->sy_value.X_add_number = (offsetT) val;
+ s->sy_value.X_unsigned = 0;
+}
+
+void
+copy_symbol_attributes (dest, src)
+ symbolS *dest, *src;
+{
+ if (LOCAL_SYMBOL_CHECK (dest))
+ dest = local_symbol_convert ((struct local_symbol *) dest);
+ if (LOCAL_SYMBOL_CHECK (src))
+ src = local_symbol_convert ((struct local_symbol *) src);
+
+#ifdef BFD_ASSEMBLER
+ /* In an expression, transfer the settings of these flags.
+ The user can override later, of course. */
+#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT)
+ dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
+#endif
+
+#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
+ OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
+#endif
+}
+
+#ifdef BFD_ASSEMBLER
+
+int
+S_IS_FUNCTION (s)
+ symbolS *s;
+{
+ flagword flags;
+
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+
+ flags = s->bsym->flags;
+
+ return (flags & BSF_FUNCTION) != 0;
+}
+
+int
+S_IS_EXTERNAL (s)
+ symbolS *s;
+{
+ flagword flags;
+
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+
+ flags = s->bsym->flags;
+
+ /* Sanity check. */
+ if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
+ abort ();
+
+ return (flags & BSF_GLOBAL) != 0;
+}
+
+int
+S_IS_WEAK (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return (s->bsym->flags & BSF_WEAK) != 0;
+}
+
+int
+S_IS_COMMON (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return bfd_is_com_section (s->bsym->section);
+}
+
+int
+S_IS_DEFINED (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return ((struct local_symbol *) s)->lsy_section != undefined_section;
+ return s->bsym->section != undefined_section;
+}
+
+int
+S_IS_DEBUG (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ if (s->bsym->flags & BSF_DEBUGGING)
+ return 1;
+ return 0;
+}
+
+int
+S_IS_LOCAL (s)
+ symbolS *s;
+{
+ flagword flags;
+ const char *name;
+
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 1;
+
+ flags = s->bsym->flags;
+
+ /* Sanity check. */
+ if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
+ abort ();
+
+ if (bfd_get_section (s->bsym) == reg_section)
+ return 1;
+
+ if (flag_strip_local_absolute
+ && (flags & BSF_GLOBAL) == 0
+ && bfd_get_section (s->bsym) == absolute_section)
+ return 1;
+
+ name = S_GET_NAME (s);
+ return (name != NULL
+ && ! S_IS_DEBUG (s)
+ && (strchr (name, DOLLAR_LABEL_CHAR)
+ || strchr (name, LOCAL_LABEL_CHAR)
+ || (! flag_keep_locals
+ && (bfd_is_local_label (stdoutput, s->bsym)
+ || (flag_mri
+ && name[0] == '?'
+ && name[1] == '?')))));
+}
+
+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;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return ((struct local_symbol *) s)->lsy_name;
+ return s->bsym->name;
+}
+
+segT
+S_GET_SEGMENT (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return ((struct local_symbol *) s)->lsy_section;
+ return s->bsym->section;
+}
+
+void
+S_SET_SEGMENT (s, seg)
+ symbolS *s;
+ segT seg;
+{
+ /* Don't reassign section symbols. The direct reason is to prevent seg
+ faults assigning back to const global symbols such as *ABS*, but it
+ shouldn't happen anyway. */
+
+ if (LOCAL_SYMBOL_CHECK (s))
+ {
+ if (seg == reg_section)
+ s = local_symbol_convert ((struct local_symbol *) s);
+ else
+ {
+ ((struct local_symbol *) s)->lsy_section = seg;
+ return;
+ }
+ }
+
+ if (s->bsym->flags & BSF_SECTION_SYM)
+ {
+ if (s->bsym->section != seg)
+ abort ();
+ }
+ else
+ s->bsym->section = seg;
+}
+
+void
+S_SET_EXTERNAL (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ if ((s->bsym->flags & BSF_WEAK) != 0)
+ {
+ /* Let .weak override .global. */
+ return;
+ }
+ if (s->bsym->flags & BSF_SECTION_SYM)
+ {
+ char * file;
+ unsigned int line;
+
+ /* Do not reassign section symbols. */
+ as_where (& file, & line);
+ as_warn_where (file, line,
+ _("section symbols are already global"));
+ return;
+ }
+ s->bsym->flags |= BSF_GLOBAL;
+ s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK);
+}
+
+void
+S_CLEAR_EXTERNAL (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ if ((s->bsym->flags & BSF_WEAK) != 0)
+ {
+ /* Let .weak override. */
+ return;
+ }
+ s->bsym->flags |= BSF_LOCAL;
+ s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK);
+}
+
+void
+S_SET_WEAK (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->bsym->flags |= BSF_WEAK;
+ s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL);
+}
+
+void
+S_SET_NAME (s, name)
+ symbolS *s;
+ char *name;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ {
+ ((struct local_symbol *) s)->lsy_name = name;
+ return;
+ }
+ s->bsym->name = name;
+}
+#endif /* BFD_ASSEMBLER */
+
+#ifdef SYMBOLS_NEED_BACKPOINTERS
+
+/* Return the previous symbol in a chain. */
+
+symbolS *
+symbol_previous (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ abort ();
+ return s->sy_previous;
+}
+
+#endif /* SYMBOLS_NEED_BACKPOINTERS */
+
+/* Return the next symbol in a chain. */
+
+symbolS *
+symbol_next (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ abort ();
+ return s->sy_next;
+}
+
+/* Return a pointer to the value of a symbol as an expression. */
+
+expressionS *
+symbol_get_value_expression (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ return &s->sy_value;
+}
+
+/* Set the value of a symbol to an expression. */
+
+void
+symbol_set_value_expression (s, exp)
+ symbolS *s;
+ const expressionS *exp;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_value = *exp;
+}
+
+/* Set the frag of a symbol. */
+
+void
+symbol_set_frag (s, f)
+ symbolS *s;
+ fragS *f;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ {
+ local_symbol_set_frag ((struct local_symbol *) s, f);
+ return;
+ }
+#endif
+ s->sy_frag = f;
+}
+
+/* Return the frag of a symbol. */
+
+fragS *
+symbol_get_frag (s)
+ symbolS *s;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ return local_symbol_get_frag ((struct local_symbol *) s);
+#endif
+ return s->sy_frag;
+}
+
+/* Mark a symbol as having been used. */
+
+void
+symbol_mark_used (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ s->sy_used = 1;
+}
+
+/* Clear the mark of whether a symbol has been used. */
+
+void
+symbol_clear_used (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_used = 0;
+}
+
+/* Return whether a symbol has been used. */
+
+int
+symbol_used_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 1;
+ return s->sy_used;
+}
+
+/* Mark a symbol as having been used in a reloc. */
+
+void
+symbol_mark_used_in_reloc (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_used_in_reloc = 1;
+}
+
+/* Clear the mark of whether a symbol has been used in a reloc. */
+
+void
+symbol_clear_used_in_reloc (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ s->sy_used_in_reloc = 0;
+}
+
+/* Return whether a symbol has been used in a reloc. */
+
+int
+symbol_used_in_reloc_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return s->sy_used_in_reloc;
+}
+
+/* Mark a symbol as an MRI common symbol. */
+
+void
+symbol_mark_mri_common (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_mri_common = 1;
+}
+
+/* Clear the mark of whether a symbol is an MRI common symbol. */
+
+void
+symbol_clear_mri_common (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ s->sy_mri_common = 0;
+}
+
+/* Return whether a symbol is an MRI common symbol. */
+
+int
+symbol_mri_common_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return s->sy_mri_common;
+}
+
+/* Mark a symbol as having been written. */
+
+void
+symbol_mark_written (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ s->written = 1;
+}
+
+/* Clear the mark of whether a symbol has been written. */
+
+void
+symbol_clear_written (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return;
+ s->written = 0;
+}
+
+/* Return whether a symbol has been written. */
+
+int
+symbol_written_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return s->written;
+}
+
+/* Mark a symbol has having been resolved. */
+
+void
+symbol_mark_resolved (s)
+ symbolS *s;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ {
+ local_symbol_mark_resolved ((struct local_symbol *) s);
+ return;
+ }
+#endif
+ s->sy_resolved = 1;
+}
+
+/* Return whether a symbol has been resolved. */
+
+int
+symbol_resolved_p (s)
+ symbolS *s;
+{
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (s))
+ return local_symbol_resolved_p ((struct local_symbol *) s);
+#endif
+ return s->sy_resolved;
+}
+
+/* Return whether a symbol is a section symbol. */
+
+int
+symbol_section_p (s)
+ symbolS *s ATTRIBUTE_UNUSED;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+#ifdef BFD_ASSEMBLER
+ return (s->bsym->flags & BSF_SECTION_SYM) != 0;
+#else
+ /* FIXME. */
+ return 0;
+#endif
+}
+
+/* Return whether a symbol is equated to another symbol. */
+
+int
+symbol_equated_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return s->sy_value.X_op == O_symbol;
+}
+
+/* Return whether a symbol is equated to another symbol, and should be
+ treated specially when writing out relocs. */
+
+int
+symbol_equated_reloc_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ /* X_op_symbol, normally not used for O_symbol, is set by
+ resolve_symbol_value to flag expression syms that have been
+ equated. */
+ return (s->sy_value.X_op == O_symbol
+ && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL)
+ || ! S_IS_DEFINED (s)
+ || S_IS_COMMON (s)));
+}
+
+/* Return whether a symbol has a constant value. */
+
+int
+symbol_constant_p (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 1;
+ return s->sy_value.X_op == O_constant;
+}
+
+#ifdef BFD_ASSEMBLER
+
+/* Return the BFD symbol for a symbol. */
+
+asymbol *
+symbol_get_bfdsym (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ return s->bsym;
+}
+
+/* Set the BFD symbol for a symbol. */
+
+void
+symbol_set_bfdsym (s, bsym)
+ symbolS *s;
+ asymbol *bsym;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->bsym = bsym;
+}
+
+#endif /* BFD_ASSEMBLER */
+
+#ifdef OBJ_SYMFIELD_TYPE
+
+/* Get a pointer to the object format information for a symbol. */
+
+OBJ_SYMFIELD_TYPE *
+symbol_get_obj (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ return &s->sy_obj;
+}
+
+/* Set the object format information for a symbol. */
+
+void
+symbol_set_obj (s, o)
+ symbolS *s;
+ OBJ_SYMFIELD_TYPE *o;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_obj = *o;
+}
+
+#endif /* OBJ_SYMFIELD_TYPE */
+
+#ifdef TC_SYMFIELD_TYPE
+
+/* Get a pointer to the processor information for a symbol. */
+
+TC_SYMFIELD_TYPE *
+symbol_get_tc (s)
+ symbolS *s;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ return &s->sy_tc;
+}
+
+/* Set the processor information for a symbol. */
+
+void
+symbol_set_tc (s, o)
+ symbolS *s;
+ TC_SYMFIELD_TYPE *o;
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ s = local_symbol_convert ((struct local_symbol *) s);
+ s->sy_tc = *o;
+}
+
+#endif /* TC_SYMFIELD_TYPE */
+
+void
+symbol_begin ()
+{
+ symbol_lastP = NULL;
+ symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
+ sy_hash = hash_new ();
+#ifdef BFD_ASSEMBLER
+ local_hash = hash_new ();
+#endif
+
+ memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
+#ifdef BFD_ASSEMBLER
+#if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL)
+ abs_symbol.bsym = bfd_abs_section.symbol;
+#endif
+#else
+ /* Can't initialise a union. Sigh. */
+ S_SET_SEGMENT (&abs_symbol, absolute_section);
+#endif
+ abs_symbol.sy_value.X_op = O_constant;
+ abs_symbol.sy_frag = &zero_address_frag;
+
+ if (LOCAL_LABELS_FB)
+ fb_label_init ();
+}
+\f
+int indent_level;
+
+/* Maximum indent level.
+ Available for modification inside a gdb session. */
+int max_indent_level = 8;
+
+#if 0
+
+static void
+indent ()
+{
+ printf ("%*s", indent_level * 4, "");
+}
+
+#endif
+
+void
+print_symbol_value_1 (file, sym)
+ FILE *file;
+ symbolS *sym;
+{
+ const char *name = S_GET_NAME (sym);
+ if (!name || !name[0])
+ name = "(unnamed)";
+ fprintf (file, "sym %lx %s", (unsigned long) sym, name);
+
+ if (LOCAL_SYMBOL_CHECK (sym))
+ {
+#ifdef BFD_ASSEMBLER
+ struct local_symbol *locsym = (struct local_symbol *) sym;
+ if (local_symbol_get_frag (locsym) != &zero_address_frag
+ && local_symbol_get_frag (locsym) != NULL)
+ fprintf (file, " frag %lx", (long) local_symbol_get_frag (locsym));
+ if (local_symbol_resolved_p (locsym))
+ fprintf (file, " resolved");
+ fprintf (file, " local");
+#endif
+ }
+ else
+ {
+ if (sym->sy_frag != &zero_address_frag)
+ fprintf (file, " frag %lx", (long) sym->sy_frag);
+ if (sym->written)
+ fprintf (file, " written");
+ if (sym->sy_resolved)
+ fprintf (file, " resolved");
+ else if (sym->sy_resolving)
+ fprintf (file, " resolving");
+ if (sym->sy_used_in_reloc)
+ fprintf (file, " used-in-reloc");
+ if (sym->sy_used)
+ fprintf (file, " used");
+ if (S_IS_LOCAL (sym))
+ fprintf (file, " local");
+ if (S_IS_EXTERN (sym))
+ fprintf (file, " extern");
+ if (S_IS_DEBUG (sym))
+ fprintf (file, " debug");
+ if (S_IS_DEFINED (sym))
+ fprintf (file, " defined");
+ }
+ fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym)));
+ if (symbol_resolved_p (sym))
+ {
+ segT s = S_GET_SEGMENT (sym);
+
+ if (s != undefined_section
+ && s != expr_section)
+ fprintf (file, " %lx", (long) S_GET_VALUE (sym));
+ }
+ else if (indent_level < max_indent_level
+ && S_GET_SEGMENT (sym) != undefined_section)
+ {
+ indent_level++;
+ fprintf (file, "\n%*s<", indent_level * 4, "");
+#ifdef BFD_ASSEMBLER
+ if (LOCAL_SYMBOL_CHECK (sym))
+ fprintf (file, "constant %lx",
+ (long) ((struct local_symbol *) sym)->lsy_value);
+ else
+#endif
+ print_expr_1 (file, &sym->sy_value);
+ fprintf (file, ">");
+ indent_level--;
+ }
+ fflush (file);
+}
+
+void
+print_symbol_value (sym)
+ symbolS *sym;
+{
+ indent_level = 0;
+ print_symbol_value_1 (stderr, sym);
+ fprintf (stderr, "\n");
+}
+
+static void
+print_binary (file, name, exp)
+ FILE *file;
+ const char *name;
+ expressionS *exp;
+{
+ indent_level++;
+ fprintf (file, "%s\n%*s<", name, indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_add_symbol);
+ fprintf (file, ">\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_op_symbol);
+ fprintf (file, ">");
+ indent_level--;
+}
+
+void
+print_expr_1 (file, exp)
+ FILE *file;
+ expressionS *exp;
+{
+ fprintf (file, "expr %lx ", (long) exp);
+ switch (exp->X_op)
+ {
+ case O_illegal:
+ fprintf (file, "illegal");
+ break;
+ case O_absent:
+ fprintf (file, "absent");
+ break;
+ case O_constant:
+ fprintf (file, "constant %lx", (long) exp->X_add_number);
+ break;
+ case O_symbol:
+ indent_level++;
+ fprintf (file, "symbol\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_add_symbol);
+ fprintf (file, ">");
+ maybe_print_addnum:
+ if (exp->X_add_number)
+ fprintf (file, "\n%*s%lx", indent_level * 4, "",
+ (long) exp->X_add_number);
+ indent_level--;
+ break;
+ case O_register:
+ fprintf (file, "register #%d", (int) exp->X_add_number);
+ break;
+ case O_big:
+ fprintf (file, "big");
+ break;
+ case O_uminus:
+ fprintf (file, "uminus -<");
+ indent_level++;
+ print_symbol_value_1 (file, exp->X_add_symbol);
+ fprintf (file, ">");
+ goto maybe_print_addnum;
+ case O_bit_not:
+ fprintf (file, "bit_not");
+ break;
+ case O_multiply:
+ print_binary (file, "multiply", exp);
+ break;
+ case O_divide:
+ print_binary (file, "divide", exp);
+ break;
+ case O_modulus:
+ print_binary (file, "modulus", exp);
+ break;
+ case O_left_shift:
+ print_binary (file, "lshift", exp);
+ break;
+ case O_right_shift:
+ print_binary (file, "rshift", exp);
+ break;
+ case O_bit_inclusive_or:
+ print_binary (file, "bit_ior", exp);
+ break;
+ case O_bit_exclusive_or:
+ print_binary (file, "bit_xor", exp);
+ break;
+ case O_bit_and:
+ print_binary (file, "bit_and", exp);
+ break;
+ case O_eq:
+ print_binary (file, "eq", exp);
+ break;
+ case O_ne:
+ print_binary (file, "ne", exp);
+ break;
+ case O_lt:
+ print_binary (file, "lt", exp);
+ break;
+ case O_le:
+ print_binary (file, "le", exp);
+ break;
+ case O_ge:
+ print_binary (file, "ge", exp);
+ break;
+ case O_gt:
+ print_binary (file, "gt", exp);
+ break;
+ case O_logical_and:
+ print_binary (file, "logical_and", exp);
+ break;
+ case O_logical_or:
+ print_binary (file, "logical_or", exp);
+ break;
+ case O_add:
+ indent_level++;
+ fprintf (file, "add\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_add_symbol);
+ fprintf (file, ">\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_op_symbol);
+ fprintf (file, ">");
+ goto maybe_print_addnum;
+ case O_subtract:
+ indent_level++;
+ fprintf (file, "subtract\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_add_symbol);
+ fprintf (file, ">\n%*s<", indent_level * 4, "");
+ print_symbol_value_1 (file, exp->X_op_symbol);
+ fprintf (file, ">");
+ goto maybe_print_addnum;
+ default:
+ fprintf (file, "{unknown opcode %d}", (int) exp->X_op);
+ break;
+ }
+ fflush (stdout);
+}
+
+void
+print_expr (exp)
+ expressionS *exp;
+{
+ print_expr_1 (stderr, exp);
+ fprintf (stderr, "\n");
+}
+
+void
+symbol_print_statistics (file)
+ FILE *file;
+{
+ hash_print_statistics (file, "symbol table", sy_hash);
+#ifdef BFD_ASSEMBLER
+ hash_print_statistics (file, "mini local symbol table", local_hash);
+ fprintf (file, "%lu mini local symbols created, %lu converted\n",
+ local_symbol_count, local_symbol_conversion_count);
+#endif
+}
projects / deliverable / binutils-gdb.git / blobdiff