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authorK. Richard Pixley <rich@cygnus>1991-04-04 18:19:53 +0000
committerK. Richard Pixley <rich@cygnus>1991-04-04 18:19:53 +0000
commitfecd2382e77b89f12c9d630ed4e42e9a54ba6953 (patch)
tree6cddf76f492c3485605175c97c13d9a24c65306f /gas/struc-symbol.h
parentb6fc45ca4c306a4f6f6bdbaf90a69d3dab62777a (diff)
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+/* struct_symbol.h - Internal symbol structure
+ Copyright (C) 1987 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 1, 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. */
+
+struct symbol /* our version of an nlist node */
+{
+ obj_symbol_type sy_symbol; /* what we write in .o file (if permitted) */
+ unsigned long sy_name_offset; /* 4-origin position of sy_name in symbols */
+ /* part of object file. */
+ /* 0 for (nameless) .stabd symbols. */
+ /* Not used until write_object_file() time. */
+ long sy_number; /* 24 bit symbol number. */
+ /* Symbol numbers start at 0 and are */
+ /* unsigned. */
+ 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 */
+/* We will probably want to add a sy_segment here soon. */
+};
+
+typedef struct symbol symbolS;
+
+typedef unsigned valueT; /* The type of n_value. Helps casting. */
+
+#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 */
+ long 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 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
+#ifdef __STDC__
+
+void symbol_clear_list_pointers(symbolS *symbolP);
+void symbol_insert(symbolS *addme, symbolS *target, symbolS **rootP, symbolS **lastP);
+void symbol_remove(symbolS *symbolP, symbolS **rootP, symbolS **lastP);
+void verify_symbol_chain(symbolS *rootP, symbolS *lastP);
+
+#else /* __STDC__ */
+
+void symbol_clear_list_pointers();
+void symbol_insert();
+void symbol_remove();
+void verify_symbol_chain();
+
+#endif /* __STDC__ */
+
+#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 */
+
+#ifdef __STDC__
+void symbol_append(symbolS *addme, symbolS *target, symbolS **rootP, symbolS **lastP);
+#else /* __STDC__ */
+void symbol_append();
+#endif /* __STDC__ */
+
+#define symbol_next(s) ((s)->sy_next)
+
+/*
+ * Local Variables:
+ * comment-column: 0
+ * fill-column: 131
+ * End:
+ */
+
+/* end of struc-symbol.h */