2577 lines
62 KiB
C
2577 lines
62 KiB
C
/* symbols.c -symbol table-
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Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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1999, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* #define DEBUG_SYMS / * to debug symbol list maintenance. */
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#include "as.h"
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#include "safe-ctype.h"
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#include "obstack.h" /* For "symbols.h" */
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#include "subsegs.h"
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#include "struc-symbol.h"
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/* This is non-zero if symbols are case sensitive, which is the
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default. */
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int symbols_case_sensitive = 1;
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#ifndef WORKING_DOT_WORD
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extern int new_broken_words;
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#endif
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/* symbol-name => struct symbol pointer */
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static struct hash_control *sy_hash;
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/* Table of local symbols. */
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static struct hash_control *local_hash;
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/* Below are commented in "symbols.h". */
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symbolS *symbol_rootP;
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symbolS *symbol_lastP;
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symbolS abs_symbol;
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#ifdef DEBUG_SYMS
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#define debug_verify_symchain verify_symbol_chain
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#else
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#define debug_verify_symchain(root, last) ((void) 0)
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#endif
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#define DOLLAR_LABEL_CHAR '\001'
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#define LOCAL_LABEL_CHAR '\002'
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struct obstack notes;
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static char *save_symbol_name (const char *);
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static void fb_label_init (void);
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static long dollar_label_instance (long);
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static long fb_label_instance (long);
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static void print_binary (FILE *, const char *, expressionS *);
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static void report_op_error (symbolS *, symbolS *, symbolS *);
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/* Return a pointer to a new symbol. Die if we can't make a new
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symbol. Fill in the symbol's values. Add symbol to end of symbol
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chain.
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This function should be called in the general case of creating a
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symbol. However, if the output file symbol table has already been
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set, and you are certain that this symbol won't be wanted in the
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output file, you can call symbol_create. */
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symbolS *
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symbol_new (const char *name, segT segment, valueT valu, fragS *frag)
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{
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symbolS *symbolP = symbol_create (name, segment, valu, frag);
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/* Link to end of symbol chain. */
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#ifdef BFD_ASSEMBLER
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{
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extern int symbol_table_frozen;
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if (symbol_table_frozen)
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abort ();
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}
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#endif
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symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP);
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return symbolP;
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}
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/* Save a symbol name on a permanent obstack, and convert it according
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to the object file format. */
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static char *
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save_symbol_name (const char *name)
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{
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unsigned int name_length;
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char *ret;
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name_length = strlen (name) + 1; /* +1 for \0. */
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obstack_grow (¬es, name, name_length);
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ret = obstack_finish (¬es);
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#ifdef STRIP_UNDERSCORE
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if (ret[0] == '_')
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++ret;
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#endif
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#ifdef tc_canonicalize_symbol_name
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ret = tc_canonicalize_symbol_name (ret);
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#endif
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if (! symbols_case_sensitive)
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{
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char *s;
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for (s = ret; *s != '\0'; s++)
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*s = TOUPPER (*s);
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}
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return ret;
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}
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symbolS *
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symbol_create (const char *name, /* It is copied, the caller can destroy/modify. */
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segT segment, /* Segment identifier (SEG_<something>). */
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valueT valu, /* Symbol value. */
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fragS *frag /* Associated fragment. */)
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{
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char *preserved_copy_of_name;
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symbolS *symbolP;
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preserved_copy_of_name = save_symbol_name (name);
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symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS));
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/* symbol must be born in some fixed state. This seems as good as any. */
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memset (symbolP, 0, sizeof (symbolS));
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#ifdef BFD_ASSEMBLER
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symbolP->bsym = bfd_make_empty_symbol (stdoutput);
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if (symbolP->bsym == NULL)
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as_perror ("%s", "bfd_make_empty_symbol");
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symbolP->bsym->udata.p = (PTR) symbolP;
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#endif
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S_SET_NAME (symbolP, preserved_copy_of_name);
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S_SET_SEGMENT (symbolP, segment);
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S_SET_VALUE (symbolP, valu);
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symbol_clear_list_pointers (symbolP);
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symbolP->sy_frag = frag;
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#ifndef BFD_ASSEMBLER
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symbolP->sy_number = ~0;
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symbolP->sy_name_offset = (unsigned int) ~0;
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#endif
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obj_symbol_new_hook (symbolP);
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#ifdef tc_symbol_new_hook
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tc_symbol_new_hook (symbolP);
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#endif
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return symbolP;
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}
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#ifdef BFD_ASSEMBLER
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/* Local symbol support. If we can get away with it, we keep only a
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small amount of information for local symbols. */
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static symbolS *local_symbol_convert (struct local_symbol *);
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/* Used for statistics. */
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static unsigned long local_symbol_count;
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static unsigned long local_symbol_conversion_count;
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/* This macro is called with a symbol argument passed by reference.
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It returns whether this is a local symbol. If necessary, it
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changes its argument to the real symbol. */
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#define LOCAL_SYMBOL_CHECK(s) \
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(s->bsym == NULL \
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? (local_symbol_converted_p ((struct local_symbol *) s) \
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? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \
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0) \
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: 1) \
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: 0)
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/* Create a local symbol and insert it into the local hash table. */
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struct local_symbol *
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local_symbol_make (const char *name, segT section, valueT value, fragS *frag)
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{
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char *name_copy;
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struct local_symbol *ret;
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++local_symbol_count;
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name_copy = save_symbol_name (name);
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ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret);
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ret->lsy_marker = NULL;
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ret->lsy_name = name_copy;
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ret->lsy_section = section;
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local_symbol_set_frag (ret, frag);
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ret->lsy_value = value;
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hash_jam (local_hash, name_copy, (PTR) ret);
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return ret;
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}
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/* Convert a local symbol into a real symbol. Note that we do not
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reclaim the space used by the local symbol. */
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static symbolS *
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local_symbol_convert (struct local_symbol *locsym)
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{
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symbolS *ret;
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assert (locsym->lsy_marker == NULL);
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if (local_symbol_converted_p (locsym))
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return local_symbol_get_real_symbol (locsym);
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++local_symbol_conversion_count;
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ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value,
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local_symbol_get_frag (locsym));
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if (local_symbol_resolved_p (locsym))
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ret->sy_resolved = 1;
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/* Local symbols are always either defined or used. */
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ret->sy_used = 1;
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#ifdef TC_LOCAL_SYMFIELD_CONVERT
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TC_LOCAL_SYMFIELD_CONVERT (locsym, ret);
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#endif
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symbol_table_insert (ret);
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local_symbol_mark_converted (locsym);
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local_symbol_set_real_symbol (locsym, ret);
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hash_jam (local_hash, locsym->lsy_name, NULL);
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return ret;
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}
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#else /* ! BFD_ASSEMBLER */
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#define LOCAL_SYMBOL_CHECK(s) 0
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#define local_symbol_convert(s) ((symbolS *) s)
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#endif /* ! BFD_ASSEMBLER */
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/* We have just seen "<name>:".
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Creates a struct symbol unless it already exists.
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Gripes if we are redefining a symbol incompatibly (and ignores it). */
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symbolS *
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colon (/* Just seen "x:" - rattle symbols & frags. */
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const char *sym_name /* Symbol name, as a cannonical string. */
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/* We copy this string: OK to alter later. */)
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{
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register symbolS *symbolP; /* Symbol we are working with. */
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/* Sun local labels go out of scope whenever a non-local symbol is
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defined. */
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if (LOCAL_LABELS_DOLLAR)
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{
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int local;
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#ifdef BFD_ASSEMBLER
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local = bfd_is_local_label_name (stdoutput, sym_name);
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#else
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local = LOCAL_LABEL (sym_name);
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#endif
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if (! local)
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dollar_label_clear ();
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}
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#ifndef WORKING_DOT_WORD
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if (new_broken_words)
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{
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struct broken_word *a;
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int possible_bytes;
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fragS *frag_tmp;
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char *frag_opcode;
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extern const int md_short_jump_size;
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extern const int md_long_jump_size;
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if (now_seg == absolute_section)
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{
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as_bad (_("cannot define symbol `%s' in absolute section"), sym_name);
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return NULL;
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}
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possible_bytes = (md_short_jump_size
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+ new_broken_words * md_long_jump_size);
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frag_tmp = frag_now;
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frag_opcode = frag_var (rs_broken_word,
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possible_bytes,
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possible_bytes,
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(relax_substateT) 0,
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(symbolS *) broken_words,
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(offsetT) 0,
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NULL);
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/* We want to store the pointer to where to insert the jump
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table in the fr_opcode of the rs_broken_word frag. This
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requires a little hackery. */
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while (frag_tmp
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&& (frag_tmp->fr_type != rs_broken_word
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|| frag_tmp->fr_opcode))
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frag_tmp = frag_tmp->fr_next;
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know (frag_tmp);
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frag_tmp->fr_opcode = frag_opcode;
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new_broken_words = 0;
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for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word)
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a->dispfrag = frag_tmp;
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}
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#endif /* WORKING_DOT_WORD */
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if ((symbolP = symbol_find (sym_name)) != 0)
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{
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#ifdef RESOLVE_SYMBOL_REDEFINITION
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if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
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return symbolP;
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||
#endif
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/* Now check for undefined symbols. */
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||
if (LOCAL_SYMBOL_CHECK (symbolP))
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{
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||
#ifdef BFD_ASSEMBLER
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struct local_symbol *locsym = (struct local_symbol *) symbolP;
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||
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||
if (locsym->lsy_section != undefined_section
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||
&& (local_symbol_get_frag (locsym) != frag_now
|
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|| locsym->lsy_section != now_seg
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|| locsym->lsy_value != frag_now_fix ()))
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{
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||
as_bad (_("symbol `%s' is already defined"), sym_name);
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return symbolP;
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||
}
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||
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||
locsym->lsy_section = now_seg;
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||
local_symbol_set_frag (locsym, frag_now);
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||
locsym->lsy_value = frag_now_fix ();
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||
#endif
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||
}
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else if (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP))
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||
{
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||
if (S_GET_VALUE (symbolP) == 0)
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||
{
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||
symbolP->sy_frag = frag_now;
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||
#ifdef OBJ_VMS
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S_SET_OTHER (symbolP, const_flag);
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||
#endif
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||
S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
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||
S_SET_SEGMENT (symbolP, now_seg);
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||
#ifdef N_UNDF
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||
know (N_UNDF == 0);
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||
#endif /* if we have one, it better be zero. */
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||
|
||
}
|
||
else
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||
{
|
||
/* There are still several cases to check:
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||
|
||
A .comm/.lcomm symbol being redefined as initialized
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||
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. */
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||
|
||
if (((!S_IS_DEBUG (symbolP)
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||
&& (!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;
|
||
}
|
||
|
||
/* Die if we can't insert the symbol. */
|
||
|
||
void
|
||
symbol_table_insert (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 */
|
||
}
|
||
|
||
/* 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 (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 (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);
|
||
}
|
||
|
||
symbolS *
|
||
symbol_temp_new (segT seg, valueT ofs, fragS *frag)
|
||
{
|
||
return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag);
|
||
}
|
||
|
||
symbolS *
|
||
symbol_temp_new_now (void)
|
||
{
|
||
return symbol_temp_new (now_seg, frag_now_fix (), frag_now);
|
||
}
|
||
|
||
symbolS *
|
||
symbol_temp_make (void)
|
||
{
|
||
return symbol_make (FAKE_LABEL_NAME);
|
||
}
|
||
|
||
/* 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 (const char *name)
|
||
{
|
||
#ifdef STRIP_UNDERSCORE
|
||
return (symbol_find_base (name, 1));
|
||
#else /* STRIP_UNDERSCORE */
|
||
return (symbol_find_base (name, 0));
|
||
#endif /* STRIP_UNDERSCORE */
|
||
}
|
||
|
||
symbolS *
|
||
symbol_find_exact (const char *name)
|
||
{
|
||
#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));
|
||
}
|
||
|
||
symbolS *
|
||
symbol_find_base (const char *name, int strip_underscore)
|
||
{
|
||
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';
|
||
}
|
||
|
||
return symbol_find_exact (name);
|
||
}
|
||
|
||
/* Once upon a time, symbols were kept in a singly linked list. At
|
||
least coff needs to be able to rearrange them from time to time, for
|
||
which a doubly linked list is much more convenient. Loic did these
|
||
as macros which seemed dangerous to me so they're now functions.
|
||
xoxorich. */
|
||
|
||
/* Link symbol ADDME after symbol TARGET in the chain. */
|
||
|
||
void
|
||
symbol_append (symbolS *addme, symbolS *target,
|
||
symbolS **rootPP, symbolS **lastPP)
|
||
{
|
||
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)
|
||
{
|
||
#ifdef SYMBOLS_NEED_BACKPOINTERS
|
||
target->sy_next->sy_previous = addme;
|
||
#endif /* SYMBOLS_NEED_BACKPOINTERS */
|
||
}
|
||
else
|
||
{
|
||
know (*lastPP == target);
|
||
*lastPP = addme;
|
||
} /* if we have a next */
|
||
|
||
addme->sy_next = target->sy_next;
|
||
target->sy_next = addme;
|
||
|
||
#ifdef SYMBOLS_NEED_BACKPOINTERS
|
||
addme->sy_previous = target;
|
||
#endif /* SYMBOLS_NEED_BACKPOINTERS */
|
||
|
||
debug_verify_symchain (symbol_rootP, symbol_lastP);
|
||
}
|
||
|
||
/* Set the chain pointers of SYMBOL to null. */
|
||
|
||
void
|
||
symbol_clear_list_pointers (symbolS *symbolP)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (symbolP))
|
||
abort ();
|
||
symbolP->sy_next = NULL;
|
||
#ifdef SYMBOLS_NEED_BACKPOINTERS
|
||
symbolP->sy_previous = NULL;
|
||
#endif
|
||
}
|
||
|
||
#ifdef SYMBOLS_NEED_BACKPOINTERS
|
||
/* Remove SYMBOLP from the list. */
|
||
|
||
void
|
||
symbol_remove (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 (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);
|
||
}
|
||
|
||
#endif /* SYMBOLS_NEED_BACKPOINTERS */
|
||
|
||
void
|
||
verify_symbol_chain (symbolS *rootP, symbolS *lastP)
|
||
{
|
||
symbolS *symbolP = rootP;
|
||
|
||
if (symbolP == NULL)
|
||
return;
|
||
|
||
for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
|
||
{
|
||
#ifdef BFD_ASSEMBLER
|
||
assert (symbolP->bsym != NULL);
|
||
#endif
|
||
#ifdef 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 */
|
||
}
|
||
|
||
assert (lastP == symbolP);
|
||
}
|
||
|
||
void
|
||
verify_symbol_chain_2 (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);
|
||
}
|
||
|
||
static void
|
||
report_op_error (symbolS *symp, symbolS *left, symbolS *right)
|
||
{
|
||
char *file;
|
||
unsigned int line;
|
||
segT seg_left = S_GET_SEGMENT (left);
|
||
segT seg_right = right ? S_GET_SEGMENT (right) : 0;
|
||
|
||
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 (left));
|
||
if (seg_right == undefined_section)
|
||
as_bad_where (file, line,
|
||
_("undefined symbol `%s' in operation"),
|
||
S_GET_NAME (right));
|
||
if (seg_left != undefined_section
|
||
&& seg_right != undefined_section)
|
||
{
|
||
if (right)
|
||
as_bad_where (file, line,
|
||
_("invalid sections for operation on `%s' and `%s'"),
|
||
S_GET_NAME (left), S_GET_NAME (right));
|
||
else
|
||
as_bad_where (file, line,
|
||
_("invalid section for operation on `%s'"),
|
||
S_GET_NAME (left));
|
||
}
|
||
|
||
}
|
||
else
|
||
{
|
||
if (seg_left == undefined_section)
|
||
as_bad (_("undefined symbol `%s' in operation setting `%s'"),
|
||
S_GET_NAME (left), S_GET_NAME (symp));
|
||
if (seg_right == undefined_section)
|
||
as_bad (_("undefined symbol `%s' in operation setting `%s'"),
|
||
S_GET_NAME (right), S_GET_NAME (symp));
|
||
if (seg_left != undefined_section
|
||
&& seg_right != undefined_section)
|
||
{
|
||
if (right)
|
||
as_bad_where (file, line,
|
||
_("invalid sections for operation on `%s' and `%s' setting `%s'"),
|
||
S_GET_NAME (left), S_GET_NAME (right), S_GET_NAME (symp));
|
||
else
|
||
as_bad_where (file, line,
|
||
_("invalid section for operation on `%s' setting `%s'"),
|
||
S_GET_NAME (left), S_GET_NAME (symp));
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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 (symbolS *symp)
|
||
{
|
||
int resolved;
|
||
valueT final_val = 0;
|
||
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);
|
||
|
||
/* By reducing these to the relevant dyadic operator, we get
|
||
!S -> S == 0 permitted on anything,
|
||
-S -> 0 - S only permitted on absolute
|
||
~S -> S ^ ~0 only permitted on absolute */
|
||
if (op != O_logical_not && seg_left != absolute_section
|
||
&& finalize_syms)
|
||
report_op_error (symp, add_symbol, NULL);
|
||
|
||
if (final_seg == expr_section || final_seg == undefined_section)
|
||
final_seg = absolute_section;
|
||
|
||
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;
|
||
|
||
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 (finalize_syms
|
||
&& !(seg_left == absolute_section
|
||
&& seg_right == absolute_section)
|
||
&& !(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)))
|
||
report_op_error (symp, add_symbol, op_symbol);
|
||
|
||
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 (const char *, PTR);
|
||
|
||
/* A static function passed to hash_traverse. */
|
||
|
||
static void
|
||
resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, PTR value)
|
||
{
|
||
if (value != NULL)
|
||
resolve_symbol_value (value);
|
||
}
|
||
|
||
#endif
|
||
|
||
/* Resolve all local symbols. */
|
||
|
||
void
|
||
resolve_local_symbol_values (void)
|
||
{
|
||
#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 (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 (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 (void)
|
||
{
|
||
memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
|
||
}
|
||
|
||
#define DOLLAR_LABEL_BUMP_BY 10
|
||
|
||
void
|
||
define_dollar_label (long label)
|
||
{
|
||
long *i;
|
||
|
||
for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
|
||
if (*i == label)
|
||
{
|
||
++dollar_label_instances[i - dollar_labels];
|
||
dollar_label_defines[i - dollar_labels] = 1;
|
||
return;
|
||
}
|
||
|
||
/* If we get to here, we don't have label listed yet. */
|
||
|
||
if (dollar_labels == NULL)
|
||
{
|
||
dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
|
||
dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
|
||
dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
|
||
dollar_label_max = DOLLAR_LABEL_BUMP_BY;
|
||
dollar_label_count = 0;
|
||
}
|
||
else if (dollar_label_count == dollar_label_max)
|
||
{
|
||
dollar_label_max += DOLLAR_LABEL_BUMP_BY;
|
||
dollar_labels = (long *) xrealloc ((char *) dollar_labels,
|
||
dollar_label_max * sizeof (long));
|
||
dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
|
||
dollar_label_max * sizeof (long));
|
||
dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
|
||
} /* if we needed to grow */
|
||
|
||
dollar_labels[dollar_label_count] = label;
|
||
dollar_label_instances[dollar_label_count] = 1;
|
||
dollar_label_defines[dollar_label_count] = 1;
|
||
++dollar_label_count;
|
||
}
|
||
|
||
/* 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 (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;
|
||
}
|
||
|
||
/* Somebody 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 (void)
|
||
{
|
||
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 (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 (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 (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 (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 (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 (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 (symbolS *dest, symbolS *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 (symbolS *s)
|
||
{
|
||
flagword flags;
|
||
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return 0;
|
||
|
||
flags = s->bsym->flags;
|
||
|
||
return (flags & BSF_FUNCTION) != 0;
|
||
}
|
||
|
||
int
|
||
S_IS_EXTERNAL (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 (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return 0;
|
||
return (s->bsym->flags & BSF_WEAK) != 0;
|
||
}
|
||
|
||
int
|
||
S_IS_COMMON (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return 0;
|
||
return bfd_is_com_section (s->bsym->section);
|
||
}
|
||
|
||
int
|
||
S_IS_DEFINED (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return ((struct local_symbol *) s)->lsy_section != undefined_section;
|
||
return s->bsym->section != undefined_section;
|
||
}
|
||
|
||
|
||
#ifndef EXTERN_FORCE_RELOC
|
||
#define EXTERN_FORCE_RELOC IS_ELF
|
||
#endif
|
||
|
||
/* Return true for symbols that should not be reduced to section
|
||
symbols or eliminated from expressions, because they may be
|
||
overridden by the linker. */
|
||
int
|
||
S_FORCE_RELOC (symbolS *s, int strict)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return ((struct local_symbol *) s)->lsy_section == undefined_section;
|
||
|
||
return ((strict
|
||
&& ((s->bsym->flags & BSF_WEAK) != 0
|
||
|| (EXTERN_FORCE_RELOC
|
||
&& (s->bsym->flags & BSF_GLOBAL) != 0)))
|
||
|| s->bsym->section == undefined_section
|
||
|| bfd_is_com_section (s->bsym->section));
|
||
}
|
||
|
||
int
|
||
S_IS_DEBUG (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return 0;
|
||
if (s->bsym->flags & BSF_DEBUGGING)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
S_IS_LOCAL (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 (symbolS *s)
|
||
{
|
||
return S_IS_EXTERNAL (s);
|
||
}
|
||
|
||
int
|
||
S_IS_STABD (symbolS *s)
|
||
{
|
||
return S_GET_NAME (s) == 0;
|
||
}
|
||
|
||
const char *
|
||
S_GET_NAME (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return ((struct local_symbol *) s)->lsy_name;
|
||
return s->bsym->name;
|
||
}
|
||
|
||
segT
|
||
S_GET_SEGMENT (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return ((struct local_symbol *) s)->lsy_section;
|
||
return s->bsym->section;
|
||
}
|
||
|
||
void
|
||
S_SET_SEGMENT (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 (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 (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 (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_THREAD_LOCAL (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
s = local_symbol_convert ((struct local_symbol *) s);
|
||
if (bfd_is_com_section (s->bsym->section)
|
||
&& (s->bsym->flags & BSF_THREAD_LOCAL) != 0)
|
||
return;
|
||
s->bsym->flags |= BSF_THREAD_LOCAL;
|
||
if ((s->bsym->flags & BSF_FUNCTION) != 0)
|
||
as_bad (_("Accessing function `%s' as thread-local object"),
|
||
S_GET_NAME (s));
|
||
else if (! bfd_is_und_section (s->bsym->section)
|
||
&& (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0)
|
||
as_bad (_("Accessing `%s' as thread-local object"),
|
||
S_GET_NAME (s));
|
||
}
|
||
|
||
void
|
||
S_SET_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 (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 (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 (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 (symbolS *s, const expressionS *exp)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
s = local_symbol_convert ((struct local_symbol *) s);
|
||
s->sy_value = *exp;
|
||
}
|
||
|
||
/* Set the value of SYM to the current position in the current segment. */
|
||
|
||
void
|
||
symbol_set_value_now (symbolS *sym)
|
||
{
|
||
S_SET_SEGMENT (sym, now_seg);
|
||
S_SET_VALUE (sym, frag_now_fix ());
|
||
symbol_set_frag (sym, frag_now);
|
||
}
|
||
|
||
/* Set the frag of a symbol. */
|
||
|
||
void
|
||
symbol_set_frag (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return;
|
||
s->written = 0;
|
||
}
|
||
|
||
/* Return whether a symbol has been written. */
|
||
|
||
int
|
||
symbol_written_p (symbolS *s)
|
||
{
|
||
if (LOCAL_SYMBOL_CHECK (s))
|
||
return 0;
|
||
return s->written;
|
||
}
|
||
|
||
/* Mark a symbol has having been resolved. */
|
||
|
||
void
|
||
symbol_mark_resolved (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (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 (void)
|
||
{
|
||
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 ();
|
||
}
|
||
|
||
int indent_level;
|
||
|
||
/* Maximum indent level.
|
||
Available for modification inside a gdb session. */
|
||
int max_indent_level = 8;
|
||
|
||
#if 0
|
||
|
||
static void
|
||
indent (void)
|
||
{
|
||
printf ("%*s", indent_level * 4, "");
|
||
}
|
||
|
||
#endif
|
||
|
||
void
|
||
print_symbol_value_1 (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 (symbolS *sym)
|
||
{
|
||
indent_level = 0;
|
||
print_symbol_value_1 (stderr, sym);
|
||
fprintf (stderr, "\n");
|
||
}
|
||
|
||
static void
|
||
print_binary (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 *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 (expressionS *exp)
|
||
{
|
||
print_expr_1 (stderr, exp);
|
||
fprintf (stderr, "\n");
|
||
}
|
||
|
||
void
|
||
symbol_print_statistics (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
|
||
}
|