/* struct_symbol.h - Internal symbol structure
- Copyright (C) 1987, 92, 93, 94, 95, 1998 Free Software Foundation, Inc.
+ Copyright 1987, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#define SYMBOLS_NEED_BACKPOINTERS
#endif
-/* our version of an nlist node */
+/* The information we keep for a symbol. Note that the symbol table
+ holds pointers both to this and to local_symbol structures. See
+ below. */
+
struct symbol
{
-#ifndef BFD_ASSEMBLER
+#ifdef BFD_ASSEMBLER
+ /* BFD symbol */
+ asymbol *bsym;
+#else
/* 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. */
+ 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. */
+ /* 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. */
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.
+ /* 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. */
#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;
- /* Segment and subsegment for broken word. */
- segT seg;
- subsegT subseg;
- /* 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 BFD_ASSEMBLER
-#ifdef SYMBOLS_NEED_BACKPOINTERS
+/* A pointer in the symbol may point to either a complete symbol
+ (struct symbol above) or to a local symbol (struct local_symbol
+ defined here). The symbol code can detect the case by examining
+ the first field. It is always NULL for a local symbol.
-void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
- symbolS ** rootP, symbolS ** lastP));
-void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
- symbolS ** lastP));
+ We do this because we ordinarily only need a small amount of
+ information for a local symbol. The symbol table takes up a lot of
+ space, and storing less information for a local symbol can make a
+ big difference in assembler memory usage when assembling a large
+ file. */
-#define symbol_previous(s) ((s)->sy_previous)
+struct local_symbol
+{
+ /* This pointer is always NULL to indicate that this is a local
+ symbol. */
+ asymbol *lsy_marker;
+
+ /* The symbol section. This also serves as a flag. If this is
+ reg_section, then this symbol has been converted into a regular
+ symbol, and lsy_sym points to it. */
+ segT lsy_section;
+
+ /* The symbol name. */
+ const char *lsy_name;
+
+ /* The symbol frag or the real symbol, depending upon the value in
+ lsy_section. If the symbol has been fully resolved, lsy_frag is
+ set to NULL. */
+ union
+ {
+ fragS *lsy_frag;
+ symbolS *lsy_sym;
+ } u;
-#endif /* SYMBOLS_NEED_BACKPOINTERS */
+ /* The value of the symbol. */
+ valueT lsy_value;
-void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
-void verify_symbol_chain_2 PARAMS ((symbolS * symP));
+#ifdef TC_LOCAL_SYMFIELD_TYPE
+ TC_LOCAL_SYMFIELD_TYPE lsy_tc;
+#endif
+};
-void symbol_append PARAMS ((symbolS * addme, symbolS * target,
- symbolS ** rootP, symbolS ** lastP));
+#define local_symbol_converted_p(l) ((l)->lsy_section == reg_section)
+#define local_symbol_mark_converted(l) ((l)->lsy_section = reg_section)
+#define local_symbol_resolved_p(l) ((l)->u.lsy_frag == NULL)
+#define local_symbol_mark_resolved(l) ((l)->u.lsy_frag = NULL)
+#define local_symbol_get_frag(l) ((l)->u.lsy_frag)
+#define local_symbol_set_frag(l, f) ((l)->u.lsy_frag = (f))
+#define local_symbol_get_real_symbol(l) ((l)->u.lsy_sym)
+#define local_symbol_set_real_symbol(l, s) ((l)->u.lsy_sym = (s))
-#define symbol_next(s) ((s)->sy_next)
+#endif /* BFD_ASSEMBLER */
#endif /* __struc_symbol_h__ */
-
-/* end of struc-symbol.h */
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