gas/symbols.h

   1 /* symbols.h -
   2    Copyright 1987, 1990, 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001
   3    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 PARAMS ((char *s));
  51 symbolS *symbol_find PARAMS ((CONST char *name));
  52 symbolS *symbol_find_base PARAMS ((CONST char *name, int strip_underscore));
  53 symbolS *symbol_find_or_make PARAMS ((const char *name));
  54 symbolS *symbol_make PARAMS ((CONST char *name));
  55 symbolS *symbol_new PARAMS ((CONST char *name, segT segment, valueT value,
  56                              fragS * frag));
  57 symbolS *symbol_create PARAMS ((CONST char *name, segT segment, valueT value,
  58                                 fragS * frag));
  59 symbolS *colon PARAMS ((const char *sym_name));
  60 void local_colon PARAMS ((int n));
  61 void symbol_begin PARAMS ((void));
  62 void symbol_print_statistics PARAMS ((FILE *));
  63 void symbol_table_insert PARAMS ((symbolS * symbolP));
  64 valueT resolve_symbol_value PARAMS ((symbolS *));
  65 void resolve_local_symbol_values PARAMS ((void));
  66
  67 void print_symbol_value PARAMS ((symbolS *));
  68 void print_expr PARAMS ((expressionS *));
  69 void print_expr_1 PARAMS ((FILE *, expressionS *));
  70 void print_symbol_value_1 PARAMS ((FILE *, symbolS *));
  71
  72 int dollar_label_defined PARAMS ((long l));
  73 void dollar_label_clear PARAMS ((void));
  74 void define_dollar_label PARAMS ((long l));
  75 char *dollar_label_name PARAMS ((long l, int augend));
  76
  77 void fb_label_instance_inc PARAMS ((long label));
  78 char *fb_label_name PARAMS ((long n, long augend));
  79
  80 extern void copy_symbol_attributes PARAMS ((symbolS *, symbolS *));
  81
  82 /* Get and set the values of symbols.  These used to be macros.  */
  83 extern valueT S_GET_VALUE PARAMS ((symbolS *));
  84 extern void S_SET_VALUE PARAMS ((symbolS *, valueT));
  85
  86 #ifdef BFD_ASSEMBLER
  87 extern int S_IS_FUNCTION PARAMS ((symbolS *));
  88 extern int S_IS_EXTERNAL PARAMS ((symbolS *));
  89 extern int S_IS_WEAK PARAMS ((symbolS *));
  90 extern int S_IS_COMMON PARAMS ((symbolS *));
  91 extern int S_IS_DEFINED PARAMS ((symbolS *));
  92 extern int S_IS_DEBUG PARAMS ((symbolS *));
  93 extern int S_IS_LOCAL PARAMS ((symbolS *));
  94 extern int S_IS_EXTERN PARAMS ((symbolS *));
  95 extern int S_IS_STABD PARAMS ((symbolS *));
  96 extern CONST char *S_GET_NAME PARAMS ((symbolS *));
  97 extern segT S_GET_SEGMENT PARAMS ((symbolS *));
  98 extern void S_SET_SEGMENT PARAMS ((symbolS *, segT));
  99 extern void S_SET_EXTERNAL PARAMS ((symbolS *));
 100 extern void S_SET_NAME PARAMS ((symbolS *, char *));
 101 extern void S_CLEAR_EXTERNAL PARAMS ((symbolS *));
 102 extern void S_SET_WEAK PARAMS ((symbolS *));
 103 #endif
 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 happend 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 PARAMS ((symbolS * symbolP));
 147
 148 #ifdef SYMBOLS_NEED_BACKPOINTERS
 149
 150 void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
 151                             symbolS ** rootP, symbolS ** lastP));
 152 void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
 153                             symbolS ** lastP));
 154
 155 extern symbolS *symbol_previous PARAMS ((symbolS *));
 156
 157 #endif /* SYMBOLS_NEED_BACKPOINTERS */
 158
 159 void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
 160 void verify_symbol_chain_2 PARAMS ((symbolS * symP));
 161
 162 void symbol_append PARAMS ((symbolS * addme, symbolS * target,
 163                             symbolS ** rootP, symbolS ** lastP));
 164
 165 extern symbolS *symbol_next PARAMS ((symbolS *));
 166
 167 extern expressionS *symbol_get_value_expression PARAMS ((symbolS *));
 168 extern void symbol_set_value_expression PARAMS ((symbolS *,
 169                                                  const expressionS *));
 170 extern void symbol_set_frag PARAMS ((symbolS *, fragS *));
 171 extern fragS *symbol_get_frag PARAMS ((symbolS *));
 172 extern void symbol_mark_used PARAMS ((symbolS *));
 173 extern void symbol_clear_used PARAMS ((symbolS *));
 174 extern int symbol_used_p PARAMS ((symbolS *));
 175 extern void symbol_mark_used_in_reloc PARAMS ((symbolS *));
 176 extern void symbol_clear_used_in_reloc PARAMS ((symbolS *));
 177 extern int symbol_used_in_reloc_p PARAMS ((symbolS *));
 178 extern void symbol_mark_mri_common PARAMS ((symbolS *));
 179 extern void symbol_clear_mri_common PARAMS ((symbolS *));
 180 extern int symbol_mri_common_p PARAMS ((symbolS *));
 181 extern void symbol_mark_written PARAMS ((symbolS *));
 182 extern void symbol_clear_written PARAMS ((symbolS *));
 183 extern int symbol_written_p PARAMS ((symbolS *));
 184 extern void symbol_mark_resolved PARAMS ((symbolS *));
 185 extern int symbol_resolved_p PARAMS ((symbolS *));
 186 extern int symbol_section_p PARAMS ((symbolS *));
 187 extern int symbol_equated_p PARAMS ((symbolS *));
 188 extern int symbol_constant_p PARAMS ((symbolS *));
 189
 190 #ifdef BFD_ASSEMBLER
 191 extern asymbol *symbol_get_bfdsym PARAMS ((symbolS *));
 192 extern void symbol_set_bfdsym PARAMS ((symbolS *, asymbol *));
 193 #endif
 194
 195 #ifdef OBJ_SYMFIELD_TYPE
 196 OBJ_SYMFIELD_TYPE *symbol_get_obj PARAMS ((symbolS *));
 197 void symbol_set_obj PARAMS ((symbolS *, OBJ_SYMFIELD_TYPE *));
 198 #endif
 199
 200 #ifdef TC_SYMFIELD_TYPE
 201 TC_SYMFIELD_TYPE *symbol_get_tc PARAMS ((symbolS *));
 202 void symbol_set_tc PARAMS ((symbolS *, TC_SYMFIELD_TYPE *));
 203 #endif