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 oYou 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__
23 struct symbol
/* our version of an nlist node */
25 obj_symbol_type sy_symbol
; /* what we write in .o file (if permitted) */
26 unsigned long sy_name_offset
; /* 4-origin position of sy_name in symbols */
27 /* part of object file. */
28 /* 0 for (nameless) .stabd symbols. */
29 /* Not used until write_object_file() time. */
30 long sy_number
; /* 24 bit symbol number. */
31 /* Symbol numbers start at 0 and are */
33 struct symbol
*sy_next
; /* forward chain, or NULL */
34 #ifdef SYMBOLS_NEED_BACKPOINTERS
35 struct symbol
*sy_previous
; /* backward chain, or NULL */
36 #endif /* SYMBOLS_NEED_BACKPOINTERS */
37 struct frag
*sy_frag
; /* NULL or -> frag this symbol attaches to. */
38 struct symbol
*sy_forward
; /* value is really that of this other symbol */
39 /* We will probably want to add a sy_segment here soon. */
42 typedef struct symbol symbolS
;
44 typedef unsigned valueT
; /* The type of n_value. Helps casting. */
46 #ifndef WORKING_DOT_WORD
49 struct broken_word
*next_broken_word
; /* One of these strucs per .word x-y */
50 fragS
*frag
; /* Which frag its in */
51 char *word_goes_here
; /* Where in the frag it is */
52 fragS
*dispfrag
; /* where to add the break */
53 symbolS
*add
; /* symbol_x */
54 symbolS
*sub
; /* - symbol_y */
55 long addnum
; /* + addnum */
56 int added
; /* nasty thing happend yet? */
57 /* 1: added and has a long-jump */
58 /* 2: added but uses someone elses long-jump */
59 struct broken_word
*use_jump
; /* points to broken_word with a similar
62 extern struct broken_word
*broken_words
;
63 #endif /* ndef WORKING_DOT_WORD */
66 * Current means for getting from symbols to segments and vice verse.
67 * This will change for infinite-segments support (e.g. COFF).
69 /* #define SYMBOL_TYPE_TO_SEGMENT(symP) ( N_TYPE_seg [(int) (symP)->sy_type & N_TYPE] ) */
70 extern segT N_TYPE_seg
[]; /* subseg.c */
72 #define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
73 extern const short seg_N_TYPE
[];/* subseg.c */
75 #define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
77 #ifdef SYMBOLS_NEED_BACKPOINTERS
80 void symbol_clear_list_pointers (symbolS
* symbolP
);
81 void symbol_insert (symbolS
* addme
, symbolS
* target
, symbolS
** rootP
, symbolS
** lastP
);
82 void symbol_remove (symbolS
* symbolP
, symbolS
** rootP
, symbolS
** lastP
);
83 void verify_symbol_chain (symbolS
* rootP
, symbolS
* lastP
);
85 #else /* not __STDC__ */
87 void symbol_clear_list_pointers ();
88 void symbol_insert ();
89 void symbol_remove ();
90 void verify_symbol_chain ();
92 #endif /* not __STDC__ */
94 #define symbol_previous(s) ((s)->sy_previous)
96 #else /* SYMBOLS_NEED_BACKPOINTERS */
98 #define symbol_clear_list_pointers(clearme) {clearme->sy_next = NULL;}
100 #endif /* SYMBOLS_NEED_BACKPOINTERS */
103 void symbol_append (symbolS
* addme
, symbolS
* target
, symbolS
** rootP
, symbolS
** lastP
);
104 #else /* not __STDC__ */
105 void symbol_append ();
106 #endif /* not __STDC__ */
108 #define symbol_next(s) ((s)->sy_next)
110 #endif /* __struc_symbol_h__ */
119 /* end of struc-symbol.h */