gas/symbols.h

   1 /* symbols.h -
   2    Copyright 1987, 1990, 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001,
   3    2002, 2003, 2004 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, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, 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_base (const char *name, int strip_underscore);
  54 symbolS *symbol_find_or_make (const char *name);
  55 symbolS *symbol_make (const char *name);
  56 symbolS *symbol_new (const char *name, segT segment, valueT value,
  57                      fragS * frag);
  58 symbolS *symbol_create (const char *name, segT segment, valueT value,
  59                         fragS * frag);
  60 struct local_symbol *local_symbol_make (const char *name, segT section,
  61                                         valueT value, fragS * frag);
  62 symbolS *symbol_temp_new (segT, valueT, fragS *);
  63 symbolS *symbol_temp_new_now (void);
  64 symbolS *symbol_temp_make (void);
  65
  66 symbolS *colon (const char *sym_name);
  67 void local_colon (int n);
  68 void symbol_begin (void);
  69 void symbol_print_statistics (FILE *);
  70 void symbol_table_insert (symbolS * symbolP);
  71 valueT resolve_symbol_value (symbolS *);
  72 void resolve_local_symbol_values (void);
  73
  74 void print_symbol_value (symbolS *);
  75 void print_expr (expressionS *);
  76 void print_expr_1 (FILE *, expressionS *);
  77 void print_symbol_value_1 (FILE *, symbolS *);
  78
  79 int dollar_label_defined (long l);
  80 void dollar_label_clear (void);
  81 void define_dollar_label (long l);
  82 char *dollar_label_name (long l, int augend);
  83
  84 void fb_label_instance_inc (long label);
  85 char *fb_label_name (long n, long augend);
  86
  87 extern void copy_symbol_attributes (symbolS *, symbolS *);
  88
  89 /* Get and set the values of symbols.  These used to be macros.  */
  90 extern valueT S_GET_VALUE (symbolS *);
  91 extern void S_SET_VALUE (symbolS *, valueT);
  92
  93 #ifdef BFD_ASSEMBLER
  94 extern int S_IS_FUNCTION (symbolS *);
  95 extern int S_IS_EXTERNAL (symbolS *);
  96 extern int S_IS_WEAK (symbolS *);
  97 extern int S_IS_COMMON (symbolS *);
  98 extern int S_IS_DEFINED (symbolS *);
  99 extern int S_FORCE_RELOC (symbolS *, int);
 100 extern int S_IS_DEBUG (symbolS *);
 101 extern int S_IS_LOCAL (symbolS *);
 102 extern int S_IS_EXTERN (symbolS *);
 103 extern int S_IS_STABD (symbolS *);
 104 extern const char *S_GET_NAME (symbolS *);
 105 extern segT S_GET_SEGMENT (symbolS *);
 106 extern void S_SET_SEGMENT (symbolS *, segT);
 107 extern void S_SET_EXTERNAL (symbolS *);
 108 extern void S_SET_NAME (symbolS *, const char *);
 109 extern void S_CLEAR_EXTERNAL (symbolS *);
 110 extern void S_SET_WEAK (symbolS *);
 111 extern void S_SET_THREAD_LOCAL (symbolS *);
 112 #endif
 113
 114 #ifndef WORKING_DOT_WORD
 115 struct broken_word
 116   {
 117     /* Linked list -- one of these structures per ".word x-y+C"
 118        expression.  */
 119     struct broken_word *next_broken_word;
 120     /* Segment and subsegment for broken word.  */
 121     segT seg;
 122     subsegT subseg;
 123     /* Which frag is this broken word in?  */
 124     fragS *frag;
 125     /* Where in the frag is it?  */
 126     char *word_goes_here;
 127     /* Where to add the break.  */
 128     fragS *dispfrag;            /* where to add the break */
 129     /* Operands of expression.  */
 130     symbolS *add;
 131     symbolS *sub;
 132     offsetT addnum;
 133
 134     int added;                  /* nasty thing happened yet? */
 135     /* 1: added and has a long-jump */
 136     /* 2: added but uses someone elses long-jump */
 137
 138     /* Pointer to broken_word with a similar long-jump.  */
 139     struct broken_word *use_jump;
 140   };
 141 extern struct broken_word *broken_words;
 142 #endif /* ndef WORKING_DOT_WORD */
 143
 144 /*
 145  * Current means for getting from symbols to segments and vice verse.
 146  * This will change for infinite-segments support (e.g. COFF).
 147  */
 148 extern const segT N_TYPE_seg[]; /* subseg.c */
 149
 150 #define SEGMENT_TO_SYMBOL_TYPE(seg)  ( seg_N_TYPE [(int) (seg)] )
 151 extern const short seg_N_TYPE[];/* subseg.c */
 152
 153 #define N_REGISTER      30      /* Fake N_TYPE value for SEG_REGISTER */
 154
 155 void symbol_clear_list_pointers (symbolS * symbolP);
 156
 157 #ifdef SYMBOLS_NEED_BACKPOINTERS
 158
 159 void symbol_insert (symbolS * addme, symbolS * target,
 160                     symbolS ** rootP, symbolS ** lastP);
 161 void symbol_remove (symbolS * symbolP, symbolS ** rootP,
 162                     symbolS ** lastP);
 163
 164 extern symbolS *symbol_previous (symbolS *);
 165
 166 #endif /* SYMBOLS_NEED_BACKPOINTERS */
 167
 168 void verify_symbol_chain (symbolS * rootP, symbolS * lastP);
 169 void verify_symbol_chain_2 (symbolS * symP);
 170
 171 void symbol_append (symbolS * addme, symbolS * target,
 172                     symbolS ** rootP, symbolS ** lastP);
 173
 174 extern symbolS *symbol_next (symbolS *);
 175
 176 extern expressionS *symbol_get_value_expression (symbolS *);
 177 extern void symbol_set_value_expression (symbolS *, const expressionS *);
 178 extern void symbol_set_value_now (symbolS *);
 179 extern void symbol_set_frag (symbolS *, fragS *);
 180 extern fragS *symbol_get_frag (symbolS *);
 181 extern void symbol_mark_used (symbolS *);
 182 extern void symbol_clear_used (symbolS *);
 183 extern int symbol_used_p (symbolS *);
 184 extern void symbol_mark_used_in_reloc (symbolS *);
 185 extern void symbol_clear_used_in_reloc (symbolS *);
 186 extern int symbol_used_in_reloc_p (symbolS *);
 187 extern void symbol_mark_mri_common (symbolS *);
 188 extern void symbol_clear_mri_common (symbolS *);
 189 extern int symbol_mri_common_p (symbolS *);
 190 extern void symbol_mark_written (symbolS *);
 191 extern void symbol_clear_written (symbolS *);
 192 extern int symbol_written_p (symbolS *);
 193 extern void symbol_mark_resolved (symbolS *);
 194 extern int symbol_resolved_p (symbolS *);
 195 extern int symbol_section_p (symbolS *);
 196 extern int symbol_equated_p (symbolS *);
 197 extern int symbol_equated_reloc_p (symbolS *);
 198 extern int symbol_constant_p (symbolS *);
 199
 200 #ifdef BFD_ASSEMBLER
 201 extern asymbol *symbol_get_bfdsym (symbolS *);
 202 extern void symbol_set_bfdsym (symbolS *, asymbol *);
 203 #endif
 204
 205 #ifdef OBJ_SYMFIELD_TYPE
 206 OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *);
 207 void symbol_set_obj (symbolS *, OBJ_SYMFIELD_TYPE *);
 208 #endif
 209
 210 #ifdef TC_SYMFIELD_TYPE
 211 TC_SYMFIELD_TYPE *symbol_get_tc (symbolS *);
 212 void symbol_set_tc (symbolS *, TC_SYMFIELD_TYPE *);
 213 #endif