gas/symbols.h

   1 /* symbols.h -
   2    Copyright 1987, 1990, 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001,
   3    2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #ifdef BFD_ASSEMBLER
  23 /* The BFD code wants to walk the list in both directions.  */
  24 #undef  SYMBOLS_NEED_BACKPOINTERS
  25 #define SYMBOLS_NEED_BACKPOINTERS
  26 #endif
  27
  28 #ifndef BFD_ASSEMBLER
  29 /* The non-BFD code expects to be able to manipulate the symbol fields
  30    directly.  */
  31 #include "struc-symbol.h"
  32 #endif
  33
  34 extern struct obstack notes;    /* eg FixS live here.  */
  35
  36 extern struct obstack cond_obstack;     /* this is where we track .ifdef/.endif
  37                                        (if we do that at all).  */
  38
  39 extern symbolS *symbol_rootP;   /* all the symbol nodes */
  40 extern symbolS *symbol_lastP;   /* last struct symbol we made, or NULL */
  41
  42 extern symbolS abs_symbol;
  43
  44 extern int symbol_table_frozen;
  45
  46 /* This is non-zero if symbols are case sensitive, which is the
  47    default.  */
  48 extern int symbols_case_sensitive;
  49
  50 char *decode_local_label_name (char *s);
  51 symbolS *symbol_find (const char *name);
  52 symbolS *symbol_find_exact (const char *name);
  53 symbolS *symbol_find_or_make (const char *name);
  54 symbolS *symbol_make (const char *name);
  55 symbolS *symbol_new (const char *name, segT segment, valueT value,
  56                      fragS * frag);
  57 symbolS *symbol_create (const char *name, segT segment, valueT value,
  58                         fragS * frag);
  59 symbolS *symbol_temp_new (segT, valueT, fragS *);
  60 symbolS *symbol_temp_new_now (void);
  61 symbolS *symbol_temp_make (void);
  62
  63 symbolS *colon (const char *sym_name);
  64 void local_colon (int n);
  65 void symbol_begin (void);
  66 void symbol_print_statistics (FILE *);
  67 void symbol_table_insert (symbolS * symbolP);
  68 valueT resolve_symbol_value (symbolS *);
  69 void resolve_local_symbol_values (void);
  70
  71 void print_symbol_value (symbolS *);
  72 void print_expr (expressionS *);
  73 void print_expr_1 (FILE *, expressionS *);
  74 void print_symbol_value_1 (FILE *, symbolS *);
  75
  76 int dollar_label_defined (long l);
  77 void dollar_label_clear (void);
  78 void define_dollar_label (long l);
  79 char *dollar_label_name (long l, int augend);
  80
  81 void fb_label_instance_inc (long label);
  82 char *fb_label_name (long n, long augend);
  83
  84 extern void copy_symbol_attributes (symbolS *, symbolS *);
  85
  86 /* Get and set the values of symbols.  These used to be macros.  */
  87 extern valueT S_GET_VALUE (symbolS *);
  88 extern void S_SET_VALUE (symbolS *, valueT);
  89
  90 #ifdef BFD_ASSEMBLER
  91 extern int S_IS_FUNCTION (symbolS *);
  92 extern int S_IS_EXTERNAL (symbolS *);
  93 extern int S_IS_WEAK (symbolS *);
  94 extern int S_IS_COMMON (symbolS *);
  95 extern int S_IS_DEFINED (symbolS *);
  96 extern int S_FORCE_RELOC (symbolS *, int);
  97 extern int S_IS_DEBUG (symbolS *);
  98 extern int S_IS_LOCAL (symbolS *);
  99 extern int S_IS_STABD (symbolS *);
 100 extern const char *S_GET_NAME (symbolS *);
 101 extern segT S_GET_SEGMENT (symbolS *);
 102 extern void S_SET_SEGMENT (symbolS *, segT);
 103 extern void S_SET_EXTERNAL (symbolS *);
 104 extern void S_SET_NAME (symbolS *, const char *);
 105 extern void S_CLEAR_EXTERNAL (symbolS *);
 106 extern void S_SET_WEAK (symbolS *);
 107 extern void S_SET_THREAD_LOCAL (symbolS *);
 108 #endif
 109
 110 #ifndef WORKING_DOT_WORD
 111 struct broken_word
 112   {
 113     /* Linked list -- one of these structures per ".word x-y+C"
 114        expression.  */
 115     struct broken_word *next_broken_word;
 116     /* Segment and subsegment for broken word.  */
 117     segT seg;
 118     subsegT subseg;
 119     /* Which frag is this broken word in?  */
 120     fragS *frag;
 121     /* Where in the frag is it?  */
 122     char *word_goes_here;
 123     /* Where to add the break.  */
 124     fragS *dispfrag;            /* where to add the break */
 125     /* Operands of expression.  */
 126     symbolS *add;
 127     symbolS *sub;
 128     offsetT addnum;
 129
 130     int added;                  /* nasty thing happened yet? */
 131     /* 1: added and has a long-jump */
 132     /* 2: added but uses someone elses long-jump */
 133
 134     /* Pointer to broken_word with a similar long-jump.  */
 135     struct broken_word *use_jump;
 136   };
 137 extern struct broken_word *broken_words;
 138 #endif /* ndef WORKING_DOT_WORD */
 139
 140 /*
 141  * Current means for getting from symbols to segments and vice verse.
 142  * This will change for infinite-segments support (e.g. COFF).
 143  */
 144 extern const segT N_TYPE_seg[]; /* subseg.c */
 145
 146 #define SEGMENT_TO_SYMBOL_TYPE(seg)  ( seg_N_TYPE [(int) (seg)] )
 147 extern const short seg_N_TYPE[];/* subseg.c */
 148
 149 #define N_REGISTER      30      /* Fake N_TYPE value for SEG_REGISTER */
 150
 151 void symbol_clear_list_pointers (symbolS * symbolP);
 152
 153 #ifdef SYMBOLS_NEED_BACKPOINTERS
 154
 155 void symbol_insert (symbolS * addme, symbolS * target,
 156                     symbolS ** rootP, symbolS ** lastP);
 157 void symbol_remove (symbolS * symbolP, symbolS ** rootP,
 158                     symbolS ** lastP);
 159
 160 extern symbolS *symbol_previous (symbolS *);
 161
 162 #endif /* SYMBOLS_NEED_BACKPOINTERS */
 163
 164 void verify_symbol_chain (symbolS * rootP, symbolS * lastP);
 165
 166 void symbol_append (symbolS * addme, symbolS * target,
 167                     symbolS ** rootP, symbolS ** lastP);
 168
 169 extern symbolS *symbol_next (symbolS *);
 170
 171 extern expressionS *symbol_get_value_expression (symbolS *);
 172 extern void symbol_set_value_expression (symbolS *, const expressionS *);
 173 extern offsetT *symbol_X_add_number (symbolS *);
 174 extern void symbol_set_value_now (symbolS *);
 175 extern void symbol_set_frag (symbolS *, fragS *);
 176 extern fragS *symbol_get_frag (symbolS *);
 177 extern void symbol_mark_used (symbolS *);
 178 extern void symbol_clear_used (symbolS *);
 179 extern int symbol_used_p (symbolS *);
 180 extern void symbol_mark_used_in_reloc (symbolS *);
 181 extern void symbol_clear_used_in_reloc (symbolS *);
 182 extern int symbol_used_in_reloc_p (symbolS *);
 183 extern void symbol_mark_mri_common (symbolS *);
 184 extern void symbol_clear_mri_common (symbolS *);
 185 extern int symbol_mri_common_p (symbolS *);
 186 extern void symbol_mark_written (symbolS *);
 187 extern void symbol_clear_written (symbolS *);
 188 extern int symbol_written_p (symbolS *);
 189 extern void symbol_mark_resolved (symbolS *);
 190 extern int symbol_resolved_p (symbolS *);
 191 extern int symbol_section_p (symbolS *);
 192 extern int symbol_equated_p (symbolS *);
 193 extern int symbol_equated_reloc_p (symbolS *);
 194 extern int symbol_constant_p (symbolS *);
 195
 196 #ifdef BFD_ASSEMBLER
 197 extern asymbol *symbol_get_bfdsym (symbolS *);
 198 extern void symbol_set_bfdsym (symbolS *, asymbol *);
 199 #endif
 200
 201 #ifdef OBJ_SYMFIELD_TYPE
 202 OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *);
 203 void symbol_set_obj (symbolS *, OBJ_SYMFIELD_TYPE *);
 204 #endif
 205
 206 #ifdef TC_SYMFIELD_TYPE
 207 TC_SYMFIELD_TYPE *symbol_get_tc (symbolS *);
 208 void symbol_set_tc (symbolS *, TC_SYMFIELD_TYPE *);
 209 #endif