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[deliverable/binutils-gdb.git] / gas / struc-symbol.h
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fecd2382 1/* struct_symbol.h - Internal symbol structure
3340f7e5 2 Copyright (C) 1987, 1992 Free Software Foundation, Inc.
6efd877d 3
a39116f1 4 This file is part of GAS, the GNU Assembler.
6efd877d 5
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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)
9 any later version.
6efd877d 10
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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.
6efd877d 15
b17c891e 16 You should have received a copy of the GNU General Public License
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17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
fecd2382 19
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20#ifndef __struc_symbol_h__
21#define __struc_symbol_h__
22
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23#ifdef BFD_ASSEMBLER
24/* The BFD code wants to walk the list in both directions. */
25#undef SYMBOLS_NEED_BACKPOINTERS
26#define SYMBOLS_NEED_BACKPOINTERS
27#endif
28
29/* our version of an nlist node */
30struct symbol
fecd2382 31{
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32#ifndef BFD_ASSEMBLER
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.
35
36 Not used until write_object_file() time. */
37 unsigned long sy_name_offset;
38
39 /* What we write in .o file (if permitted). */
40 obj_symbol_type sy_symbol;
41
42 /* The 24 bit symbol number. Symbol numbers start at 0 and are unsigned. */
43 long sy_number;
44#else
45 /* BFD symbol */
46 asymbol *bsym;
47#endif
48
6efd877d 49 struct symbol *sy_next; /* forward chain, or NULL */
fecd2382 50#ifdef SYMBOLS_NEED_BACKPOINTERS
6efd877d 51 struct symbol *sy_previous; /* backward chain, or NULL */
fecd2382 52#endif /* SYMBOLS_NEED_BACKPOINTERS */
b17c891e 53
6efd877d 54 struct frag *sy_frag; /* NULL or -> frag this symbol attaches to. */
b17c891e 55
6efd877d 56 struct symbol *sy_forward; /* value is really that of this other symbol */
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57
58 int written : 1;
59
60#ifdef TARGET_SYMBOL_FIELDS
61 TARGET_SYMBOL_FIELDS
62#endif
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63};
64
65typedef struct symbol symbolS;
66
fecd2382 67#ifndef WORKING_DOT_WORD
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68struct broken_word
69 {
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 */
b17c891e 76 offsetT addnum; /* + addnum */
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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
fecd2382 81 long-jump */
6efd877d 82 };
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83extern struct broken_word *broken_words;
84#endif /* ndef WORKING_DOT_WORD */
85
86/*
87 * Current means for getting from symbols to segments and vice verse.
88 * This will change for infinite-segments support (e.g. COFF).
89 */
90/* #define SYMBOL_TYPE_TO_SEGMENT(symP) ( N_TYPE_seg [(int) (symP)->sy_type & N_TYPE] ) */
b17c891e 91extern const segT N_TYPE_seg[]; /* subseg.c */
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92
93#define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
6efd877d 94extern const short seg_N_TYPE[];/* subseg.c */
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95
96#define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
97
98#ifdef SYMBOLS_NEED_BACKPOINTERS
fecd2382 99
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100void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
101void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
102 symbolS ** rootP, symbolS ** lastP));
103void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
104 symbolS ** lastP));
105void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
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106
107#define symbol_previous(s) ((s)->sy_previous)
108
109#else /* SYMBOLS_NEED_BACKPOINTERS */
110
111#define symbol_clear_list_pointers(clearme) {clearme->sy_next = NULL;}
112
113#endif /* SYMBOLS_NEED_BACKPOINTERS */
114
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115void symbol_append PARAMS ((symbolS * addme, symbolS * target,
116 symbolS ** rootP, symbolS ** lastP));
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117
118#define symbol_next(s) ((s)->sy_next)
119
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120#endif /* __struc_symbol_h__ */
121
fecd2382 122/* end of struc-symbol.h */
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