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