1/* symbols.h - 2 Copyright (C) 1987-2017 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 21extern struct obstack notes; /* eg FixS live here. */ 22 23extern struct obstack cond_obstack; /* this is where we track .ifdef/.endif 24 (if we do that at all). */ 25 26extern symbolS *symbol_rootP; /* all the symbol nodes */ 27extern symbolS *symbol_lastP; /* last struct symbol we made, or NULL */ 28 29extern symbolS abs_symbol; 30extern symbolS dot_symbol; 31 32extern int symbol_table_frozen; 33 34/* This is non-zero if symbols are case sensitive, which is the 35 default. */ 36extern int symbols_case_sensitive; 37 38char * symbol_relc_make_expr (expressionS *); 39char * symbol_relc_make_sym (symbolS *); 40char * symbol_relc_make_value (offsetT); 41char *decode_local_label_name (char *s); 42symbolS *symbol_find (const char *name); 43symbolS *symbol_find_noref (const char *name, int noref); 44symbolS *symbol_find_exact (const char *name); 45symbolS *symbol_find_exact_noref (const char *name, int noref); 46symbolS *symbol_find_or_make (const char *name); 47symbolS *symbol_make (const char *name); 48symbolS *symbol_new (const char *name, segT segment, valueT value, 49 fragS * frag); 50symbolS *symbol_create (const char *name, segT segment, valueT value, 51 fragS * frag); 52struct local_symbol *local_symbol_make (const char *name, segT section, 53 valueT val, fragS *frag); 54symbolS *symbol_clone (symbolS *, int); 55#undef symbol_clone_if_forward_ref 56symbolS *symbol_clone_if_forward_ref (symbolS *, int); 57#define symbol_clone_if_forward_ref(s) symbol_clone_if_forward_ref (s, 0) 58symbolS *symbol_temp_new (segT, valueT, fragS *); 59symbolS *symbol_temp_new_now (void); 60symbolS *symbol_temp_make (void); 61 62symbolS *colon (const char *sym_name); 63void local_colon (int n); 64void symbol_begin (void); 65void dot_symbol_init (void); 66void symbol_print_statistics (FILE *); 67void symbol_table_insert (symbolS * symbolP); 68valueT resolve_symbol_value (symbolS *); 69void resolve_local_symbol_values (void); 70int snapshot_symbol (symbolS **, valueT *, segT *, fragS **); 71 72void print_symbol_value (symbolS *); 73void print_expr (expressionS *); 74void print_expr_1 (FILE *, expressionS *); 75void print_symbol_value_1 (FILE *, symbolS *); 76 77int dollar_label_defined (long l); 78void dollar_label_clear (void); 79void define_dollar_label (long l); 80char *dollar_label_name (long l, int augend); 81 82void fb_label_instance_inc (long label); 83char *fb_label_name (long n, long augend); 84 85extern void copy_symbol_attributes (symbolS *, symbolS *); 86 87/* Get and set the values of symbols. These used to be macros. */ 88extern valueT S_GET_VALUE (symbolS *); 89extern void S_SET_VALUE (symbolS *, valueT); 90 91extern int S_IS_FUNCTION (symbolS *); 92extern int S_IS_EXTERNAL (symbolS *); 93extern int S_IS_WEAK (symbolS *); 94extern int S_IS_WEAKREFR (symbolS *); 95extern int S_IS_WEAKREFD (symbolS *); 96extern int S_IS_COMMON (symbolS *); 97extern int S_IS_DEFINED (symbolS *); 98extern int S_FORCE_RELOC (symbolS *, int); 99extern int S_IS_DEBUG (symbolS *); 100extern int S_IS_LOCAL (symbolS *); 101extern int S_IS_STABD (symbolS *); 102extern int S_CAN_BE_REDEFINED (const symbolS *); 103extern int S_IS_VOLATILE (const symbolS *); 104extern int S_IS_FORWARD_REF (const symbolS *); 105extern const char *S_GET_NAME (symbolS *); 106extern segT S_GET_SEGMENT (symbolS *); 107extern void S_SET_SEGMENT (symbolS *, segT); 108extern void S_SET_EXTERNAL (symbolS *); 109extern void S_SET_NAME (symbolS *, const char *); 110extern void S_CLEAR_EXTERNAL (symbolS *); 111extern void S_SET_WEAK (symbolS *); 112extern void S_SET_WEAKREFR (symbolS *); 113extern void S_CLEAR_WEAKREFR (symbolS *); 114extern void S_SET_WEAKREFD (symbolS *); 115extern void S_CLEAR_WEAKREFD (symbolS *); 116extern void S_SET_THREAD_LOCAL (symbolS *); 117extern void S_SET_VOLATILE (symbolS *); 118extern void S_CLEAR_VOLATILE (symbolS *); 119extern void S_SET_FORWARD_REF (symbolS *); 120 121#ifndef WORKING_DOT_WORD 122struct broken_word 123 { 124 /* Linked list -- one of these structures per ".word x-y+C" 125 expression. */ 126 struct broken_word *next_broken_word; 127 /* Segment and subsegment for broken word. */ 128 segT seg; 129 subsegT subseg; 130 /* Which frag is this broken word in? */ 131 fragS *frag; 132 /* Where in the frag is it? */ 133 char *word_goes_here; 134 /* Where to add the break. */ 135 fragS *dispfrag; /* where to add the break */ 136 /* Operands of expression. */ 137 symbolS *add; 138 symbolS *sub; 139 offsetT addnum; 140 141 int added; /* nasty thing happened yet? */ 142 /* 1: added and has a long-jump */ 143 /* 2: added but uses someone elses long-jump */ 144 145 /* Pointer to broken_word with a similar long-jump. */ 146 struct broken_word *use_jump; 147 }; 148extern struct broken_word *broken_words; 149#endif /* ndef WORKING_DOT_WORD */ 150 151/* 152 * Current means for getting from symbols to segments and vice verse. 153 * This will change for infinite-segments support (e.g. COFF). 154 */ 155extern const segT N_TYPE_seg[]; /* subseg.c */ 156 157#define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] ) 158extern const short seg_N_TYPE[];/* subseg.c */ 159 160#define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */ 161 162void symbol_clear_list_pointers (symbolS * symbolP); 163 164void symbol_insert (symbolS * addme, symbolS * target, 165 symbolS ** rootP, symbolS ** lastP); 166void symbol_remove (symbolS * symbolP, symbolS ** rootP, 167 symbolS ** lastP); 168 169extern symbolS *symbol_previous (symbolS *); 170 171void verify_symbol_chain (symbolS * rootP, symbolS * lastP); 172 173void symbol_append (symbolS * addme, symbolS * target, 174 symbolS ** rootP, symbolS ** lastP); 175 176extern symbolS *symbol_next (symbolS *); 177 178extern expressionS *symbol_get_value_expression (symbolS *); 179extern void symbol_set_value_expression (symbolS *, const expressionS *); 180extern offsetT *symbol_X_add_number (symbolS *); 181extern void symbol_set_value_now (symbolS *); 182extern void symbol_set_frag (symbolS *, fragS *); 183extern fragS *symbol_get_frag (symbolS *); 184extern void symbol_mark_used (symbolS *); 185extern void symbol_clear_used (symbolS *); 186extern int symbol_used_p (symbolS *); 187extern void symbol_mark_used_in_reloc (symbolS *); 188extern void symbol_clear_used_in_reloc (symbolS *); 189extern int symbol_used_in_reloc_p (symbolS *); 190extern void symbol_mark_mri_common (symbolS *); 191extern void symbol_clear_mri_common (symbolS *); 192extern int symbol_mri_common_p (symbolS *); 193extern void symbol_mark_written (symbolS *); 194extern void symbol_clear_written (symbolS *); 195extern int symbol_written_p (symbolS *); 196extern void symbol_mark_resolved (symbolS *); 197extern int symbol_resolved_p (symbolS *); 198extern int symbol_section_p (symbolS *); 199extern int symbol_equated_p (symbolS *); 200extern int symbol_equated_reloc_p (symbolS *); 201extern int symbol_constant_p (symbolS *); 202extern int symbol_shadow_p (symbolS *); 203extern asymbol *symbol_get_bfdsym (symbolS *); 204extern void symbol_set_bfdsym (symbolS *, asymbol *); 205extern int symbol_same_p (symbolS *, symbolS *); 206 207#ifdef OBJ_SYMFIELD_TYPE 208OBJ_SYMFIELD_TYPE *symbol_get_obj (symbolS *); 209void symbol_set_obj (symbolS *, OBJ_SYMFIELD_TYPE *); 210#endif 211 212#ifdef TC_SYMFIELD_TYPE 213TC_SYMFIELD_TYPE *symbol_get_tc (symbolS *); 214void symbol_set_tc (symbolS *, TC_SYMFIELD_TYPE *); 215#endif 216