old-cross-binutils/gas/symbols.h
Alan Modra e0890092b6 * expr.c (expr): Move code setting "retval" to the end of the loop,
and rearrange for efficiency.  For "PIC code" subtraction, use
	"rightseg" rather than recalculating.  For "symbol OP symbol"
	subtract, set "retval" to absolute_section if symbols in same
	section.
	* symbols.c (resolve_symbol_value): Resolve "sym +/- expr" to an
	O_symbol.  Simplify a +/- b code.  Allow equality and non-equality
	comparisons on symbols from any section.  Allow other comparison
	operators as for subtraction.
	(symbol_equated_reloc_p): New predicate function.
	* symbols.h (symbol_equated_reloc_p): Declare.
	* write.c (adjust_reloc_syms): Use symbol_equated_reloc_p.
	(write_relocs): Likewise.
	(write_object_file): Likewise.
	(relax_segment <rs_machine_dependent>): Ensure segment for
	expression syms is set correctly.
	* config/tc-mips.c (md_estimate_size_before_relax): Likewise.
	* config/tc-i386.c (md_assemble <Output jumps>): Don't lose part
	of a complex expression when setting up frag_var.
2001-09-09 14:01:17 +00:00

204 lines
7.4 KiB
C

/* symbols.h -
Copyright 1987, 1990, 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001
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. */
#ifdef BFD_ASSEMBLER
/* The BFD code wants to walk the list in both directions. */
#undef SYMBOLS_NEED_BACKPOINTERS
#define SYMBOLS_NEED_BACKPOINTERS
#endif
#ifndef BFD_ASSEMBLER
/* The non-BFD code expects to be able to manipulate the symbol fields
directly. */
#include "struc-symbol.h"
#endif
extern struct obstack notes; /* eg FixS live here. */
extern struct obstack cond_obstack; /* this is where we track .ifdef/.endif
(if we do that at all). */
extern symbolS *symbol_rootP; /* all the symbol nodes */
extern symbolS *symbol_lastP; /* last struct symbol we made, or NULL */
extern symbolS abs_symbol;
extern int symbol_table_frozen;
/* This is non-zero if symbols are case sensitive, which is the
default. */
extern int symbols_case_sensitive;
char *decode_local_label_name PARAMS ((char *s));
symbolS *symbol_find PARAMS ((CONST char *name));
symbolS *symbol_find_base PARAMS ((CONST char *name, int strip_underscore));
symbolS *symbol_find_or_make PARAMS ((const char *name));
symbolS *symbol_make PARAMS ((CONST char *name));
symbolS *symbol_new PARAMS ((CONST char *name, segT segment, valueT value,
fragS * frag));
symbolS *symbol_create PARAMS ((CONST char *name, segT segment, valueT value,
fragS * frag));
symbolS *colon PARAMS ((const char *sym_name));
void local_colon PARAMS ((int n));
void symbol_begin PARAMS ((void));
void symbol_print_statistics PARAMS ((FILE *));
void symbol_table_insert PARAMS ((symbolS * symbolP));
valueT resolve_symbol_value PARAMS ((symbolS *));
void resolve_local_symbol_values PARAMS ((void));
void print_symbol_value PARAMS ((symbolS *));
void print_expr PARAMS ((expressionS *));
void print_expr_1 PARAMS ((FILE *, expressionS *));
void print_symbol_value_1 PARAMS ((FILE *, symbolS *));
int dollar_label_defined PARAMS ((long l));
void dollar_label_clear PARAMS ((void));
void define_dollar_label PARAMS ((long l));
char *dollar_label_name PARAMS ((long l, int augend));
void fb_label_instance_inc PARAMS ((long label));
char *fb_label_name PARAMS ((long n, long augend));
extern void copy_symbol_attributes PARAMS ((symbolS *, symbolS *));
/* Get and set the values of symbols. These used to be macros. */
extern valueT S_GET_VALUE PARAMS ((symbolS *));
extern void S_SET_VALUE PARAMS ((symbolS *, valueT));
#ifdef BFD_ASSEMBLER
extern int S_IS_FUNCTION PARAMS ((symbolS *));
extern int S_IS_EXTERNAL PARAMS ((symbolS *));
extern int S_IS_WEAK PARAMS ((symbolS *));
extern int S_IS_COMMON PARAMS ((symbolS *));
extern int S_IS_DEFINED PARAMS ((symbolS *));
extern int S_IS_DEBUG PARAMS ((symbolS *));
extern int S_IS_LOCAL PARAMS ((symbolS *));
extern int S_IS_EXTERN PARAMS ((symbolS *));
extern int S_IS_STABD PARAMS ((symbolS *));
extern CONST char *S_GET_NAME PARAMS ((symbolS *));
extern segT S_GET_SEGMENT PARAMS ((symbolS *));
extern void S_SET_SEGMENT PARAMS ((symbolS *, segT));
extern void S_SET_EXTERNAL PARAMS ((symbolS *));
extern void S_SET_NAME PARAMS ((symbolS *, char *));
extern void S_CLEAR_EXTERNAL PARAMS ((symbolS *));
extern void S_SET_WEAK PARAMS ((symbolS *));
#endif
#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));
extern symbolS *symbol_previous PARAMS ((symbolS *));
#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));
extern symbolS *symbol_next PARAMS ((symbolS *));
extern expressionS *symbol_get_value_expression PARAMS ((symbolS *));
extern void symbol_set_value_expression PARAMS ((symbolS *,
const expressionS *));
extern void symbol_set_frag PARAMS ((symbolS *, fragS *));
extern fragS *symbol_get_frag PARAMS ((symbolS *));
extern void symbol_mark_used PARAMS ((symbolS *));
extern void symbol_clear_used PARAMS ((symbolS *));
extern int symbol_used_p PARAMS ((symbolS *));
extern void symbol_mark_used_in_reloc PARAMS ((symbolS *));
extern void symbol_clear_used_in_reloc PARAMS ((symbolS *));
extern int symbol_used_in_reloc_p PARAMS ((symbolS *));
extern void symbol_mark_mri_common PARAMS ((symbolS *));
extern void symbol_clear_mri_common PARAMS ((symbolS *));
extern int symbol_mri_common_p PARAMS ((symbolS *));
extern void symbol_mark_written PARAMS ((symbolS *));
extern void symbol_clear_written PARAMS ((symbolS *));
extern int symbol_written_p PARAMS ((symbolS *));
extern void symbol_mark_resolved PARAMS ((symbolS *));
extern int symbol_resolved_p PARAMS ((symbolS *));
extern int symbol_section_p PARAMS ((symbolS *));
extern int symbol_equated_p PARAMS ((symbolS *));
extern int symbol_equated_reloc_p PARAMS ((symbolS *));
extern int symbol_constant_p PARAMS ((symbolS *));
#ifdef BFD_ASSEMBLER
extern asymbol *symbol_get_bfdsym PARAMS ((symbolS *));
extern void symbol_set_bfdsym PARAMS ((symbolS *, asymbol *));
#endif
#ifdef OBJ_SYMFIELD_TYPE
OBJ_SYMFIELD_TYPE *symbol_get_obj PARAMS ((symbolS *));
void symbol_set_obj PARAMS ((symbolS *, OBJ_SYMFIELD_TYPE *));
#endif
#ifdef TC_SYMFIELD_TYPE
TC_SYMFIELD_TYPE *symbol_get_tc PARAMS ((symbolS *));
void symbol_set_tc PARAMS ((symbolS *, TC_SYMFIELD_TYPE *));
#endif