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- /* struct_symbol.h - Internal symbol structure
- Copyright (C) 1987, 1992, 1993, 1994 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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;
-
- /* Forwards and (optionally) backwards chain pointers. */
- struct symbol *sy_next;
- #ifdef SYMBOLS_NEED_BACKPOINTERS
- struct symbol *sy_previous;
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
-
- /* Pointer to the frag this symbol is attached to, if any.
- Otherwise, NULL. */
- struct frag *sy_frag;
-
- unsigned int written : 1;
- /* Whether symbol value has been completely resolved (used during
- final pass over symbol table). */
- unsigned int sy_resolved : 1;
- /* Whether the symbol value is currently being resolved (used to
- detect loops in symbol dependencies). */
- unsigned int sy_resolving : 1;
- /* Whether the symbol value is used in a reloc. This is used to
- ensure that symbols used in relocs are written out, even if they
- are local and would otherwise not be. */
- unsigned int sy_used_in_reloc : 1;
-
- /* Whether the symbol is used as an operand or in an expression.
- NOTE: Not all the backends keep this information accurate;
- backends which use this bit are responsible for setting it when
- a symbol is used in backend routines. */
- unsigned int sy_used : 1;
-
- /* This is set if the symbol is defined in an MRI common section.
- We handle such sections as single common symbols, so symbols
- defined within them must be treated specially by the relocation
- routines. */
- unsigned int sy_mri_common : 1;
-
- #ifdef OBJ_SYMFIELD_TYPE
- OBJ_SYMFIELD_TYPE sy_obj;
- #endif
-
- #ifdef TC_SYMFIELD_TYPE
- TC_SYMFIELD_TYPE sy_tc;
- #endif
-
- #ifdef TARGET_SYMBOL_FIELDS
- TARGET_SYMBOL_FIELDS
- #endif
- };
-
- typedef struct symbol symbolS;
-
- #ifndef WORKING_DOT_WORD
- struct broken_word
- {
- /* Linked list -- one of these structures per ".word x-y+C"
- expression. */
- struct broken_word *next_broken_word;
- /* Which frag is this broken word in? */
- fragS *frag;
- /* Where in the frag is it? */
- char *word_goes_here;
- /* Where to add the break. */
- fragS *dispfrag; /* where to add the break */
- /* Operands of expression. */
- symbolS *add;
- symbolS *sub;
- offsetT addnum;
-
- int added; /* nasty thing happend yet? */
- /* 1: added and has a long-jump */
- /* 2: added but uses someone elses long-jump */
-
- /* Pointer to broken_word with a similar long-jump. */
- struct broken_word *use_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).
- */
- 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 */
-
- void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
-
- #ifdef SYMBOLS_NEED_BACKPOINTERS
-
- void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
- symbolS ** rootP, symbolS ** lastP));
- void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
- symbolS ** lastP));
-
- #define symbol_previous(s) ((s)->sy_previous)
-
- #endif /* SYMBOLS_NEED_BACKPOINTERS */
-
- void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
- void verify_symbol_chain_2 PARAMS ((symbolS * symP));
-
- 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 */
-