1 /* struct_symbol.h - Internal symbol structure
2 Copyright (C) 1987, 1992 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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 2, or (at your option)
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.
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
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 #ifndef __struc_symbol_h__
21 #define __struc_symbol_h__
24 /* The BFD code wants to walk the list in both directions. */
25 #undef SYMBOLS_NEED_BACKPOINTERS
26 #define SYMBOLS_NEED_BACKPOINTERS
29 /* our version of an nlist node */
33 /* The (4-origin) position of sy_name in the symbol table of the object
34 file. This will be 0 for (nameless) .stabd symbols.
36 Not used until write_object_file() time. */
37 unsigned long sy_name_offset;
39 /* What we write in .o file (if permitted). */
40 obj_symbol_type sy_symbol;
42 /* The 24 bit symbol number. Symbol numbers start at 0 and are unsigned. */
49 struct symbol *sy_next; /* forward chain, or NULL */
50 #ifdef SYMBOLS_NEED_BACKPOINTERS
51 struct symbol *sy_previous; /* backward chain, or NULL */
52 #endif /* SYMBOLS_NEED_BACKPOINTERS */
54 struct frag *sy_frag; /* NULL or -> frag this symbol attaches to. */
56 struct symbol *sy_forward; /* value is really that of this other symbol */
60 #ifdef TARGET_SYMBOL_FIELDS
65 typedef struct symbol symbolS;
67 #ifndef WORKING_DOT_WORD
70 struct broken_word *next_broken_word; /* One of these strucs per .word x-y */
71 fragS *frag; /* Which frag its in */
72 char *word_goes_here; /* Where in the frag it is */
73 fragS *dispfrag; /* where to add the break */
74 symbolS *add; /* symbol_x */
75 symbolS *sub; /* - symbol_y */
76 offsetT addnum; /* + addnum */
77 int added; /* nasty thing happend yet? */
78 /* 1: added and has a long-jump */
79 /* 2: added but uses someone elses long-jump */
80 struct broken_word *use_jump; /* points to broken_word with a similar
83 extern struct broken_word *broken_words;
84 #endif /* ndef WORKING_DOT_WORD */
87 * Current means for getting from symbols to segments and vice verse.
88 * This will change for infinite-segments support (e.g. COFF).
90 /* #define SYMBOL_TYPE_TO_SEGMENT(symP) ( N_TYPE_seg [(int) (symP)->sy_type & N_TYPE] ) */
91 extern const segT N_TYPE_seg[]; /* subseg.c */
93 #define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
94 extern const short seg_N_TYPE[];/* subseg.c */
96 #define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
98 #ifdef SYMBOLS_NEED_BACKPOINTERS
100 void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
101 void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
102 symbolS ** rootP, symbolS ** lastP));
103 void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
105 void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
107 #define symbol_previous(s) ((s)->sy_previous)
109 #else /* SYMBOLS_NEED_BACKPOINTERS */
111 #define symbol_clear_list_pointers(clearme) {clearme->sy_next = NULL;}
113 #endif /* SYMBOLS_NEED_BACKPOINTERS */
115 void symbol_append PARAMS ((symbolS * addme, symbolS * target,
116 symbolS ** rootP, symbolS ** lastP));
118 #define symbol_next(s) ((s)->sy_next)
120 #endif /* __struc_symbol_h__ */
122 /* end of struc-symbol.h */