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Diffstat (limited to 'gas/struc-symbol.h')
| -rw-r--r-- | gas/struc-symbol.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/gas/struc-symbol.h b/gas/struc-symbol.h new file mode 100644 index 0000000..aeb0405 --- /dev/null +++ b/gas/struc-symbol.h @@ -0,0 +1,166 @@ +/* struct_symbol.h - Internal symbol structure + Copyright (C) 1987, 92, 93, 94, 95, 1998 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; + /* 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 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 */ |