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/* struct_symbol.h - Internal symbol structure
Copyright (C) 1987, 1992 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef __struc_symbol_h__
#define __struc_symbol_h__
#ifdef BFD_ASSEMBLER
/* The BFD code wants to walk the list in both directions. */
#undef SYMBOLS_NEED_BACKPOINTERS
#define SYMBOLS_NEED_BACKPOINTERS
#endif
/* our version of an nlist node */
struct symbol
{
#ifndef BFD_ASSEMBLER
/* The (4-origin) position of sy_name in the symbol table of the object
file. This will be 0 for (nameless) .stabd symbols.
Not used until write_object_file() time. */
unsigned long sy_name_offset;
/* What we write in .o file (if permitted). */
obj_symbol_type sy_symbol;
/* The 24 bit symbol number. Symbol numbers start at 0 and are unsigned. */
long sy_number;
#else
/* BFD symbol */
asymbol *bsym;
#endif
/* The value of the symbol. */
expressionS sy_value;
struct symbol *sy_next; /* forward chain, or NULL */
#ifdef SYMBOLS_NEED_BACKPOINTERS
struct symbol *sy_previous; /* backward chain, or NULL */
#endif /* SYMBOLS_NEED_BACKPOINTERS */
struct frag *sy_frag; /* NULL or -> frag this symbol attaches to. */
struct symbol *sy_forward; /* value is really that of this other symbol */
int written : 1;
#ifdef TARGET_SYMBOL_FIELDS
TARGET_SYMBOL_FIELDS
#endif
};
typedef struct symbol symbolS;
#ifndef WORKING_DOT_WORD
struct broken_word
{
struct broken_word *next_broken_word; /* One of these strucs per .word x-y */
fragS *frag; /* Which frag its in */
char *word_goes_here; /* Where in the frag it is */
fragS *dispfrag; /* where to add the break */
symbolS *add; /* symbol_x */
symbolS *sub; /* - symbol_y */
offsetT addnum; /* + addnum */
int added; /* nasty thing happend yet? */
/* 1: added and has a long-jump */
/* 2: added but uses someone elses long-jump */
struct broken_word *use_jump; /* points to broken_word with a similar
long-jump */
};
extern struct broken_word *broken_words;
#endif /* ndef WORKING_DOT_WORD */
/*
* Current means for getting from symbols to segments and vice verse.
* This will change for infinite-segments support (e.g. COFF).
*/
/* #define SYMBOL_TYPE_TO_SEGMENT(symP) ( N_TYPE_seg [(int) (symP)->sy_type & N_TYPE] ) */
extern const segT N_TYPE_seg[]; /* subseg.c */
#define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
extern const short seg_N_TYPE[];/* subseg.c */
#define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
#ifdef SYMBOLS_NEED_BACKPOINTERS
void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
symbolS ** rootP, symbolS ** lastP));
void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
symbolS ** lastP));
void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
#define symbol_previous(s) ((s)->sy_previous)
#else /* SYMBOLS_NEED_BACKPOINTERS */
#define symbol_clear_list_pointers(clearme) {clearme->sy_next = NULL;}
#endif /* SYMBOLS_NEED_BACKPOINTERS */
void symbol_append PARAMS ((symbolS * addme, symbolS * target,
symbolS ** rootP, symbolS ** lastP));
#define symbol_next(s) ((s)->sy_next)
#endif /* __struc_symbol_h__ */
/* end of struc-symbol.h */
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