gas/symbols.h

   1 /* symbols.h -
   2    Copyright (C) 1987-2021 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 extern struct obstack notes;    /* eg FixS live here.  */
  22
  23 extern struct obstack cond_obstack;     /* this is where we track .ifdef/.endif
  24                                        (if we do that at all).  */
  25
  26 extern symbolS *symbol_rootP;   /* all the symbol nodes */
  27 extern symbolS *symbol_lastP;   /* last struct symbol we made, or NULL */
  28
  29 extern symbolS abs_symbol;
  30 extern symbolS dot_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 * symbol_relc_make_expr  (expressionS *);
  39 char * symbol_relc_make_sym   (symbolS *);
  40 char * symbol_relc_make_value (offsetT);
  41 char *decode_local_label_name (char *s);
  42 symbolS *symbol_find (const char *name);
  43 symbolS *symbol_find_noref (const char *name, int noref);
  44 symbolS *symbol_find_exact (const char *name);
  45 symbolS *symbol_find_exact_noref (const char *name, int noref);
  46 symbolS *symbol_find_or_make (const char *name);
  47 symbolS *symbol_make (const char *name);
  48 symbolS *symbol_new (const char *, segT, fragS *, valueT);
  49 symbolS *symbol_create (const char *, segT, fragS *, valueT);
  50 struct local_symbol *local_symbol_make (const char *, segT, fragS *, valueT);
  51 symbolS *symbol_clone (symbolS *, int);
  52 #undef symbol_clone_if_forward_ref
  53 symbolS *symbol_clone_if_forward_ref (symbolS *, int);
  54 #define symbol_clone_if_forward_ref(s) symbol_clone_if_forward_ref (s, 0)
  55 symbolS *symbol_temp_new (segT, fragS *, valueT);
  56 symbolS *symbol_temp_new_now (void);
  57 symbolS *symbol_temp_new_now_octets (void);
  58 symbolS *symbol_temp_make (void);
  59
  60 symbolS *colon (const char *sym_name);
  61 void local_colon (int n);
  62 void symbol_begin (void);
  63 void dot_symbol_init (void);
  64 void symbol_print_statistics (FILE *);
  65 void symbol_table_insert (symbolS * symbolP);
  66 valueT resolve_symbol_value (symbolS *);
  67 void resolve_local_symbol_values (void);
  68 int snapshot_symbol (symbolS **, valueT *, segT *, fragS **);
  69
  70 void print_symbol_value (symbolS *);
  71 void print_expr (expressionS *);
  72 void print_expr_1 (FILE *, expressionS *);
  73 void print_symbol_value_1 (FILE *, symbolS *);
  74
  75 int dollar_label_defined (long l);
  76 void dollar_label_clear (void);
  77 void define_dollar_label (long l);
  78 char *dollar_label_name (long l, int augend);
  79
  80 void fb_label_instance_inc (long label);
  81 char *fb_label_name (long n, long augend);
  82
  83 extern void copy_symbol_attributes (symbolS *, symbolS *);
  84
  85 /* Get and set the values of symbols.  These used to be macros.  */
  86 extern valueT S_GET_VALUE (symbolS *);
  87 extern void S_SET_VALUE (symbolS *, valueT);
  88
  89 extern int S_IS_FUNCTION (symbolS *);
  90 extern int S_IS_EXTERNAL (symbolS *);
  91 extern int S_IS_WEAK (symbolS *);
  92 extern int S_IS_WEAKREFR (symbolS *);
  93 extern int S_IS_WEAKREFD (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 int S_CAN_BE_REDEFINED (const symbolS *);
 101 extern int S_IS_VOLATILE (const symbolS *);
 102 extern int S_IS_FORWARD_REF (const symbolS *);
 103 extern const char *S_GET_NAME (symbolS *);
 104 extern segT S_GET_SEGMENT (symbolS *);
 105 extern void S_SET_SEGMENT (symbolS *, segT);
 106 extern void S_SET_EXTERNAL (symbolS *);
 107 extern void S_SET_NAME (symbolS *, const char *);
 108 extern void S_CLEAR_EXTERNAL (symbolS *);
 109 extern void S_SET_WEAK (symbolS *);
 110 extern void S_SET_WEAKREFR (symbolS *);
 111 extern void S_CLEAR_WEAKREFR (symbolS *);
 112 extern void S_SET_WEAKREFD (symbolS *);
 113 extern void S_CLEAR_WEAKREFD (symbolS *);
 114 extern void S_SET_THREAD_LOCAL (symbolS *);
 115 extern void S_SET_VOLATILE (symbolS *);
 116 extern void S_CLEAR_VOLATILE (symbolS *);
 117 extern void S_SET_FORWARD_REF (symbolS *);
 118
 119 #ifndef WORKING_DOT_WORD
 120 struct broken_word
 121   {
 122     /* Linked list -- one of these structures per ".word x-y+C"
 123        expression.  */
 124     struct broken_word *next_broken_word;
 125     /* Segment and subsegment for broken word.  */
 126     segT seg;
 127     subsegT subseg;
 128     /* Which frag is this broken word in?  */
 129     fragS *frag;
 130     /* Where in the frag is it?  */
 131     char *word_goes_here;
 132     /* Where to add the break.  */
 133     fragS *dispfrag;            /* where to add the break */
 134     /* Operands of expression.  */
 135     symbolS *add;
 136     symbolS *sub;
 137     offsetT addnum;
 138
 139     int added;                  /* nasty thing happened yet? */
 140     /* 1: added and has a long-jump */
 141     /* 2: added but uses someone elses long-jump */
 142
 143     /* Pointer to broken_word with a similar long-jump.  */
 144     struct broken_word *use_jump;
 145   };
 146 extern struct broken_word *broken_words;
 147 #endif /* ifdef WORKING_DOT_WORD */
 148
 149 /*
 150  * Current means for getting from symbols to segments and vice verse.
 151  * This will change for infinite-segments support (e.g. COFF).
 152  */
 153 extern const segT N_TYPE_seg[]; /* subseg.c */
 154
 155 #define SEGMENT_TO_SYMBOL_TYPE(seg)  ( seg_N_TYPE [(int) (seg)] )
 156 extern const short seg_N_TYPE[];/* subseg.c */
 157
 158 #define N_REGISTER      30      /* Fake N_TYPE value for SEG_REGISTER */
 159
 160 void symbol_clear_list_pointers (symbolS * symbolP);
 161
 162 void symbol_insert (symbolS * addme, symbolS * target,
 163                     symbolS ** rootP, symbolS ** lastP);
 164 void symbol_remove (symbolS * symbolP, symbolS ** rootP,
 165                     symbolS ** lastP);
 166
 167 extern symbolS *symbol_previous (symbolS *);
 168
 169 extern int symbol_on_chain (symbolS *s, symbolS *rootPP, symbolS *lastPP);
 170
 171 void verify_symbol_chain (symbolS * rootP, symbolS * lastP);
 172
 173 void symbol_append (symbolS * addme, symbolS * target,
 174                     symbolS ** rootP, symbolS ** lastP);
 175
 176 extern symbolS *symbol_next (symbolS *);
 177
 178 extern expressionS *symbol_get_value_expression (symbolS *);
 179 extern void symbol_set_value_expression (symbolS *, const expressionS *);
 180 extern offsetT *symbol_X_add_number (symbolS *);
 181 extern void symbol_set_value_now (symbolS *);
 182 extern void symbol_set_frag (symbolS *, fragS *);
 183 extern fragS *symbol_get_frag (symbolS *);
 184 extern void symbol_mark_used (symbolS *);
 185 extern void symbol_clear_used (symbolS *);
 186 extern int symbol_used_p (symbolS *);
 187 extern void symbol_mark_used_in_reloc (symbolS *);
 188 extern void symbol_clear_used_in_reloc (symbolS *);
 189 extern int symbol_used_in_reloc_p (symbolS *);
 190 extern void symbol_mark_mri_common (symbolS *);
 191 extern void symbol_clear_mri_common (symbolS *);
 192 extern int symbol_mri_common_p (symbolS *);
 193 extern void symbol_mark_written (symbolS *);
 194 extern void symbol_clear_written (symbolS *);
 195 extern int symbol_written_p (symbolS *);
 196 extern void symbol_mark_resolved (symbolS *);
 197 extern int symbol_resolved_p (symbolS *);
 198 extern int symbol_section_p (symbolS *);
 199 extern int symbol_equated_p (symbolS *);
 200 extern int symbol_equated_reloc_p (symbolS *);
 201 extern int symbol_constant_p (symbolS *);
 202 extern int symbol_shadow_p (symbolS *);
 203 extern symbolS *symbol_symbolS (symbolS *);
 204 extern asymbol *symbol_get_bfdsym (symbolS *);
 205 extern void symbol_set_bfdsym (symbolS *, asymbol *);
 206 extern int symbol_same_p (symbolS *, symbolS *);
 207
 208 #ifdef OBJ_SYMFIELD_TYPE
 209 OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *);
 210 void symbol_set_obj (symbolS *, OBJ_SYMFIELD_TYPE *);
 211 #endif
 212
 213 #ifdef TC_SYMFIELD_TYPE
 214 TC_SYMFIELD_TYPE *symbol_get_tc (symbolS *);
 215 void symbol_set_tc (symbolS *, TC_SYMFIELD_TYPE *);
 216 #endif