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 extern struct obstack notes;    /* eg FixS live here.  */
  23
  24 extern struct obstack cond_obstack;     /* this is where we track .ifdef/.endif
  25                                        (if we do that at all).  */
  26
  27 extern symbolS *symbol_rootP;   /* all the symbol nodes */
  28 extern symbolS *symbol_lastP;   /* last struct symbol we made, or NULL */
  29
  30 extern symbolS abs_symbol;
  31
  32 extern int symbol_table_frozen;
  33
  34 /* This is non-zero if symbols are case sensitive, which is the
  35    default.  */
  36 extern int symbols_case_sensitive;
  37
  38 char *decode_local_label_name (char *s);
  39 symbolS *symbol_find (const char *name);
  40 symbolS *symbol_find_exact (const char *name);
  41 symbolS *symbol_find_or_make (const char *name);
  42 symbolS *symbol_make (const char *name);
  43 symbolS *symbol_new (const char *name, segT segment, valueT value,
  44                      fragS * frag);
  45 symbolS *symbol_create (const char *name, segT segment, valueT value,
  46                         fragS * frag);
  47 symbolS *symbol_clone (symbolS *, int);
  48 #undef symbol_clone_if_forward_ref
  49 symbolS *symbol_clone_if_forward_ref (symbolS *, int);
  50 #define symbol_clone_if_forward_ref(s) symbol_clone_if_forward_ref (s, 0)
  51 symbolS *symbol_temp_new (segT, valueT, fragS *);
  52 symbolS *symbol_temp_new_now (void);
  53 symbolS *symbol_temp_make (void);
  54
  55 symbolS *colon (const char *sym_name);
  56 void local_colon (int n);
  57 void symbol_begin (void);
  58 void symbol_print_statistics (FILE *);
  59 void symbol_table_insert (symbolS * symbolP);
  60 valueT resolve_symbol_value (symbolS *);
  61 void resolve_local_symbol_values (void);
  62 int snapshot_symbol (symbolS *, valueT *, segT *, fragS **);
  63
  64 void print_symbol_value (symbolS *);
  65 void print_expr (expressionS *);
  66 void print_expr_1 (FILE *, expressionS *);
  67 void print_symbol_value_1 (FILE *, symbolS *);
  68
  69 int dollar_label_defined (long l);
  70 void dollar_label_clear (void);
  71 void define_dollar_label (long l);
  72 char *dollar_label_name (long l, int augend);
  73
  74 void fb_label_instance_inc (long label);
  75 char *fb_label_name (long n, long augend);
  76
  77 extern void copy_symbol_attributes (symbolS *, symbolS *);
  78
  79 /* Get and set the values of symbols.  These used to be macros.  */
  80 extern valueT S_GET_VALUE (symbolS *);
  81 extern void S_SET_VALUE (symbolS *, valueT);
  82
  83 extern int S_IS_FUNCTION (symbolS *);
  84 extern int S_IS_EXTERNAL (symbolS *);
  85 extern int S_IS_WEAK (symbolS *);
  86 extern int S_IS_COMMON (symbolS *);
  87 extern int S_IS_DEFINED (symbolS *);
  88 extern int S_FORCE_RELOC (symbolS *, int);
  89 extern int S_IS_DEBUG (symbolS *);
  90 extern int S_IS_LOCAL (symbolS *);
  91 extern int S_IS_STABD (symbolS *);
  92 extern int S_IS_VOLATILE (const symbolS *);
  93 extern int S_IS_FORWARD_REF (const symbolS *);
  94 extern const char *S_GET_NAME (symbolS *);
  95 extern segT S_GET_SEGMENT (symbolS *);
  96 extern void S_SET_SEGMENT (symbolS *, segT);
  97 extern void S_SET_EXTERNAL (symbolS *);
  98 extern void S_SET_NAME (symbolS *, const char *);
  99 extern void S_CLEAR_EXTERNAL (symbolS *);
 100 extern void S_SET_WEAK (symbolS *);
 101 extern void S_SET_THREAD_LOCAL (symbolS *);
 102 extern void S_SET_VOLATILE (symbolS *);
 103 extern void S_SET_FORWARD_REF (symbolS *);
 104
 105 #ifndef WORKING_DOT_WORD
 106 struct broken_word
 107   {
 108     /* Linked list -- one of these structures per ".word x-y+C"
 109        expression.  */
 110     struct broken_word *next_broken_word;
 111     /* Segment and subsegment for broken word.  */
 112     segT seg;
 113     subsegT subseg;
 114     /* Which frag is this broken word in?  */
 115     fragS *frag;
 116     /* Where in the frag is it?  */
 117     char *word_goes_here;
 118     /* Where to add the break.  */
 119     fragS *dispfrag;            /* where to add the break */
 120     /* Operands of expression.  */
 121     symbolS *add;
 122     symbolS *sub;
 123     offsetT addnum;
 124
 125     int added;                  /* nasty thing happened yet? */
 126     /* 1: added and has a long-jump */
 127     /* 2: added but uses someone elses long-jump */
 128
 129     /* Pointer to broken_word with a similar long-jump.  */
 130     struct broken_word *use_jump;
 131   };
 132 extern struct broken_word *broken_words;
 133 #endif /* ndef WORKING_DOT_WORD */
 134
 135 /*
 136  * Current means for getting from symbols to segments and vice verse.
 137  * This will change for infinite-segments support (e.g. COFF).
 138  */
 139 extern const segT N_TYPE_seg[]; /* subseg.c */
 140
 141 #define SEGMENT_TO_SYMBOL_TYPE(seg)  ( seg_N_TYPE [(int) (seg)] )
 142 extern const short seg_N_TYPE[];/* subseg.c */
 143
 144 #define N_REGISTER      30      /* Fake N_TYPE value for SEG_REGISTER */
 145
 146 void symbol_clear_list_pointers (symbolS * symbolP);
 147
 148 void symbol_insert (symbolS * addme, symbolS * target,
 149                     symbolS ** rootP, symbolS ** lastP);
 150 void symbol_remove (symbolS * symbolP, symbolS ** rootP,
 151                     symbolS ** lastP);
 152
 153 extern symbolS *symbol_previous (symbolS *);
 154
 155 void verify_symbol_chain (symbolS * rootP, symbolS * lastP);
 156
 157 void symbol_append (symbolS * addme, symbolS * target,
 158                     symbolS ** rootP, symbolS ** lastP);
 159
 160 extern symbolS *symbol_next (symbolS *);
 161
 162 extern expressionS *symbol_get_value_expression (symbolS *);
 163 extern void symbol_set_value_expression (symbolS *, const expressionS *);
 164 extern offsetT *symbol_X_add_number (symbolS *);
 165 extern void symbol_set_value_now (symbolS *);
 166 extern void symbol_set_frag (symbolS *, fragS *);
 167 extern fragS *symbol_get_frag (symbolS *);
 168 extern void symbol_mark_used (symbolS *);
 169 extern void symbol_clear_used (symbolS *);
 170 extern int symbol_used_p (symbolS *);
 171 extern void symbol_mark_used_in_reloc (symbolS *);
 172 extern void symbol_clear_used_in_reloc (symbolS *);
 173 extern int symbol_used_in_reloc_p (symbolS *);
 174 extern void symbol_mark_mri_common (symbolS *);
 175 extern void symbol_clear_mri_common (symbolS *);
 176 extern int symbol_mri_common_p (symbolS *);
 177 extern void symbol_mark_written (symbolS *);
 178 extern void symbol_clear_written (symbolS *);
 179 extern int symbol_written_p (symbolS *);
 180 extern void symbol_mark_resolved (symbolS *);
 181 extern int symbol_resolved_p (symbolS *);
 182 extern int symbol_section_p (symbolS *);
 183 extern int symbol_equated_p (symbolS *);
 184 extern int symbol_equated_reloc_p (symbolS *);
 185 extern int symbol_constant_p (symbolS *);
 186 extern asymbol *symbol_get_bfdsym (symbolS *);
 187 extern void symbol_set_bfdsym (symbolS *, asymbol *);
 188
 189 #ifdef OBJ_SYMFIELD_TYPE
 190 OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *);
 191 void symbol_set_obj (symbolS *, OBJ_SYMFIELD_TYPE *);
 192 #endif
 193
 194 #ifdef TC_SYMFIELD_TYPE
 195 TC_SYMFIELD_TYPE *symbol_get_tc (symbolS *);
 196 void symbol_set_tc (symbolS *, TC_SYMFIELD_TYPE *);
 197 #endif