a01b9fa4ba
* as.h: Fix formatting. * asintl.h: Likewise. * bit_fix.h: Likewise. * dwarf2dbg.h: Likewise. * expr.h: Likewise. * flonum.h: Likewise. * frags.h: Likewise. * itbl-ops.h: Likewise. * macro.h: Likewise. * read.h: Likewise. * sb.h: Likewise. * struc-symbol.h: Likewise. * subsegs.h: Likewise. * symbols.h: Likewise. * tc.h: Likewise. * write.h: Likewise.
160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/* frags.h - Header file for the frag concept.
|
|
Copyright (C) 1987, 92, 93, 94, 95, 97, 98, 99, 2000
|
|
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 FRAGS_H
|
|
#define FRAGS_H
|
|
|
|
#ifdef ANSI_PROTOTYPES
|
|
struct obstack;
|
|
#endif
|
|
|
|
/*
|
|
* A code fragment (frag) is some known number of chars, followed by some
|
|
* unknown number of chars. Typically the unknown number of chars is an
|
|
* instruction address whose size is yet unknown. We always know the greatest
|
|
* possible size the unknown number of chars may become, and reserve that
|
|
* much room at the end of the frag.
|
|
* Once created, frags do not change address during assembly.
|
|
* We chain the frags in (a) forward-linked list(s). The object-file address
|
|
* of the 1st char of a frag is generally not known until after relax().
|
|
* Many things at assembly time describe an address by {object-file-address
|
|
* of a particular frag}+offset.
|
|
|
|
BUG: it may be smarter to have a single pointer off to various different
|
|
notes for different frag kinds. See how code pans
|
|
*/
|
|
|
|
struct frag
|
|
{
|
|
/* Object file address (as an octet offset). */
|
|
addressT fr_address;
|
|
/* Chain forward; ascending address order. Rooted in frch_root. */
|
|
struct frag *fr_next;
|
|
|
|
/* (Fixed) number of octets we know we have. May be 0. */
|
|
offsetT fr_fix;
|
|
/* May be used for (Variable) number of octets after above.
|
|
The generic frag handling code no longer makes any use of fr_var. */
|
|
offsetT fr_var;
|
|
/* For variable-length tail. */
|
|
symbolS *fr_symbol;
|
|
/* For variable-length tail. */
|
|
offsetT fr_offset;
|
|
/* Points to opcode low addr byte, for relaxation. */
|
|
char *fr_opcode;
|
|
|
|
#ifndef NO_LISTING
|
|
struct list_info_struct *line;
|
|
#endif
|
|
|
|
/* What state is my tail in? */
|
|
relax_stateT fr_type;
|
|
relax_substateT fr_subtype;
|
|
|
|
#ifdef USING_CGEN
|
|
/* Don't include this unless using CGEN to keep frag size down. */
|
|
struct {
|
|
/* CGEN_INSN entry for this instruction. */
|
|
const struct cgen_insn *insn;
|
|
/* Index into operand table. */
|
|
int opindex;
|
|
/* Target specific data, usually reloc number. */
|
|
int opinfo;
|
|
} fr_cgen;
|
|
#endif
|
|
|
|
#ifdef TC_FRAG_TYPE
|
|
TC_FRAG_TYPE tc_frag_data;
|
|
#endif
|
|
|
|
/* Where the frag was created, or where it became a variant frag. */
|
|
char *fr_file;
|
|
unsigned int fr_line;
|
|
|
|
/* Data begins here. */
|
|
char fr_literal[1];
|
|
};
|
|
|
|
#define SIZEOF_STRUCT_FRAG \
|
|
((char *)zero_address_frag.fr_literal-(char *)&zero_address_frag)
|
|
/* We want to say fr_literal[0] above. */
|
|
|
|
/* Current frag we are building. This frag is incomplete. It is,
|
|
however, included in frchain_now. The fr_fix field is bogus;
|
|
instead, use frag_now_fix (). */
|
|
COMMON fragS *frag_now;
|
|
extern addressT frag_now_fix PARAMS ((void));
|
|
extern addressT frag_now_fix_octets PARAMS ((void));
|
|
|
|
/* For foreign-segment symbol fixups. */
|
|
COMMON fragS zero_address_frag;
|
|
/* For local common (N_BSS segment) fixups. */
|
|
COMMON fragS bss_address_frag;
|
|
|
|
#if 0
|
|
/*
|
|
* A macro to speed up appending exactly 1 char
|
|
* to current frag.
|
|
*/
|
|
/* JF changed < 1 to <= 1 to avoid a race conditon */
|
|
#define FRAG_APPEND_1_CHAR(datum) \
|
|
{ \
|
|
if (obstack_room( &frags ) <= 1) {\
|
|
frag_wane (frag_now); \
|
|
frag_new (0); \
|
|
} \
|
|
obstack_1grow( &frags, datum ); \
|
|
}
|
|
#else
|
|
extern void frag_append_1_char PARAMS ((int));
|
|
#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
|
|
#endif
|
|
|
|
void frag_init PARAMS ((void));
|
|
fragS *frag_alloc PARAMS ((struct obstack *));
|
|
void frag_grow PARAMS ((unsigned int nchars));
|
|
char *frag_more PARAMS ((int nchars));
|
|
void frag_align PARAMS ((int alignment, int fill_character, int max));
|
|
void frag_align_pattern PARAMS ((int alignment,
|
|
const char *fill_pattern,
|
|
int n_fill,
|
|
int max));
|
|
void frag_new PARAMS ((int old_frags_var_max_size));
|
|
void frag_wane PARAMS ((fragS * fragP));
|
|
|
|
char *frag_variant PARAMS ((relax_stateT type,
|
|
int max_chars,
|
|
int var,
|
|
relax_substateT subtype,
|
|
symbolS * symbol,
|
|
offsetT offset,
|
|
char *opcode));
|
|
|
|
char *frag_var PARAMS ((relax_stateT type,
|
|
int max_chars,
|
|
int var,
|
|
relax_substateT subtype,
|
|
symbolS * symbol,
|
|
offsetT offset,
|
|
char *opcode));
|
|
|
|
#endif /* FRAGS_H */
|