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