166 lines
5.1 KiB
C
166 lines
5.1 KiB
C
/* struct_symbol.h - Internal symbol structure
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Copyright (C) 1987, 92, 93, 94, 95, 1998 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef __struc_symbol_h__
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#define __struc_symbol_h__
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#ifdef BFD_ASSEMBLER
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/* The BFD code wants to walk the list in both directions. */
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#undef SYMBOLS_NEED_BACKPOINTERS
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#define SYMBOLS_NEED_BACKPOINTERS
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#endif
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/* our version of an nlist node */
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struct symbol
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{
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#ifndef BFD_ASSEMBLER
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/* The (4-origin) position of sy_name in the symbol table of the object
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file. This will be 0 for (nameless) .stabd symbols.
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Not used until write_object_file() time. */
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unsigned long sy_name_offset;
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/* What we write in .o file (if permitted). */
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obj_symbol_type sy_symbol;
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/* The 24 bit symbol number. Symbol numbers start at 0 and are unsigned. */
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long sy_number;
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#else
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/* BFD symbol */
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asymbol *bsym;
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#endif
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/* The value of the symbol. */
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expressionS sy_value;
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/* Forwards and (optionally) backwards chain pointers. */
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struct symbol *sy_next;
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#ifdef SYMBOLS_NEED_BACKPOINTERS
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struct symbol *sy_previous;
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#endif /* SYMBOLS_NEED_BACKPOINTERS */
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/* Pointer to the frag this symbol is attached to, if any.
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Otherwise, NULL. */
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struct frag *sy_frag;
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unsigned int written : 1;
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/* Whether symbol value has been completely resolved (used during
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final pass over symbol table). */
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unsigned int sy_resolved : 1;
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/* Whether the symbol value is currently being resolved (used to
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detect loops in symbol dependencies). */
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unsigned int sy_resolving : 1;
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/* Whether the symbol value is used in a reloc. This is used to
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ensure that symbols used in relocs are written out, even if they
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are local and would otherwise not be. */
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unsigned int sy_used_in_reloc : 1;
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/* Whether the symbol is used as an operand or in an expression.
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NOTE: Not all the backends keep this information accurate;
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backends which use this bit are responsible for setting it when
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a symbol is used in backend routines. */
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unsigned int sy_used : 1;
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/* This is set if the symbol is defined in an MRI common section.
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We handle such sections as single common symbols, so symbols
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defined within them must be treated specially by the relocation
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routines. */
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unsigned int sy_mri_common : 1;
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#ifdef OBJ_SYMFIELD_TYPE
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OBJ_SYMFIELD_TYPE sy_obj;
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#endif
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#ifdef TC_SYMFIELD_TYPE
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TC_SYMFIELD_TYPE sy_tc;
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#endif
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#ifdef TARGET_SYMBOL_FIELDS
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TARGET_SYMBOL_FIELDS
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#endif
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};
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typedef struct symbol symbolS;
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#ifndef WORKING_DOT_WORD
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struct broken_word
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{
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/* Linked list -- one of these structures per ".word x-y+C"
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expression. */
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struct broken_word *next_broken_word;
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/* Segment and subsegment for broken word. */
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segT seg;
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subsegT subseg;
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/* Which frag is this broken word in? */
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fragS *frag;
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/* Where in the frag is it? */
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char *word_goes_here;
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/* Where to add the break. */
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fragS *dispfrag; /* where to add the break */
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/* Operands of expression. */
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symbolS *add;
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symbolS *sub;
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offsetT addnum;
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int added; /* nasty thing happend yet? */
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/* 1: added and has a long-jump */
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/* 2: added but uses someone elses long-jump */
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/* Pointer to broken_word with a similar long-jump. */
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struct broken_word *use_jump;
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};
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extern struct broken_word *broken_words;
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#endif /* ndef WORKING_DOT_WORD */
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/*
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* Current means for getting from symbols to segments and vice verse.
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* This will change for infinite-segments support (e.g. COFF).
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*/
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extern const segT N_TYPE_seg[]; /* subseg.c */
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#define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
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extern const short seg_N_TYPE[];/* subseg.c */
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#define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
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void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
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#ifdef SYMBOLS_NEED_BACKPOINTERS
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void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
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symbolS ** rootP, symbolS ** lastP));
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void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
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symbolS ** lastP));
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#define symbol_previous(s) ((s)->sy_previous)
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#endif /* SYMBOLS_NEED_BACKPOINTERS */
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void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
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void verify_symbol_chain_2 PARAMS ((symbolS * symP));
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void symbol_append PARAMS ((symbolS * addme, symbolS * target,
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symbolS ** rootP, symbolS ** lastP));
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#define symbol_next(s) ((s)->sy_next)
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#endif /* __struc_symbol_h__ */
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/* end of struc-symbol.h */
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