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 /* The value of the symbol. */
52 struct symbol *sy_next; /* forward chain, or NULL */
53 #ifdef SYMBOLS_NEED_BACKPOINTERS
54 struct symbol *sy_previous; /* backward chain, or NULL */
55 #endif /* SYMBOLS_NEED_BACKPOINTERS */
57 struct frag *sy_frag; /* NULL or -> frag this symbol attaches to. */
59 struct symbol *sy_forward; /* value is really that of this other symbol */
63 #ifdef TARGET_SYMBOL_FIELDS
68 typedef struct symbol symbolS;
70 #ifndef WORKING_DOT_WORD
73 struct broken_word *next_broken_word; /* One of these strucs per .word x-y */
74 fragS *frag; /* Which frag its in */
75 char *word_goes_here; /* Where in the frag it is */
76 fragS *dispfrag; /* where to add the break */
77 symbolS *add; /* symbol_x */
78 symbolS *sub; /* - symbol_y */
79 offsetT addnum; /* + addnum */
80 int added; /* nasty thing happend yet? */
81 /* 1: added and has a long-jump */
82 /* 2: added but uses someone elses long-jump */
83 struct broken_word *use_jump; /* points to broken_word with a similar
86 extern struct broken_word *broken_words;
87 #endif /* ndef WORKING_DOT_WORD */
90 * Current means for getting from symbols to segments and vice verse.
91 * This will change for infinite-segments support (e.g. COFF).
93 /* #define SYMBOL_TYPE_TO_SEGMENT(symP) ( N_TYPE_seg [(int) (symP)->sy_type & N_TYPE] ) */
94 extern const segT N_TYPE_seg[]; /* subseg.c */
96 #define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
97 extern const short seg_N_TYPE[];/* subseg.c */
99 #define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
101 #ifdef SYMBOLS_NEED_BACKPOINTERS
103 void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
104 void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
105 symbolS ** rootP, symbolS ** lastP));
106 void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
108 void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
110 #define symbol_previous(s) ((s)->sy_previous)
112 #else /* SYMBOLS_NEED_BACKPOINTERS */
114 #define symbol_clear_list_pointers(clearme) {clearme->sy_next = NULL;}
116 #endif /* SYMBOLS_NEED_BACKPOINTERS */
118 void symbol_append PARAMS ((symbolS * addme, symbolS * target,
119 symbolS ** rootP, symbolS ** lastP));
121 #define symbol_next(s) ((s)->sy_next)
123 #endif /* __struc_symbol_h__ */
125 /* end of struc-symbol.h */