OpenBSD-4.6/gnu/usr.bin/gas/as.h
/* $OpenBSD: as.h,v 1.4 1998/04/25 06:48:35 niklas Exp $ */
/* as.h - global header file
Copyright (C) 1987, 1990, 1991, 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#define GAS 1
/* #include <ansidecl.h> */
#include "host.h"
#include "flonum.h"
#if __STDC__ != 1
#define volatile /**/
#ifndef const
#define const /**/
#endif /* const */
#endif /* __STDC__ */
#ifdef __GNUC__
#define alloca __builtin_alloca
#define register
#endif /* __GNUC__ */
#ifndef __LINE__
#define __LINE__ "unknown"
#endif /* __LINE__ */
#ifndef __FILE__
#define __FILE__ "unknown"
#endif /* __FILE__ */
#ifndef PARAMS
#if __STDC__ != 1
#define PARAMS(x) ()
#else
#define PARAMS(x) x
#endif
#endif /*PARAMS */
/*
* I think this stuff is largely out of date. xoxorich.
*
* CAPITALISED names are #defined.
* "lowercaseH" is #defined if "lowercase.h" has been #include-d.
* "lowercaseT" is a typedef of "lowercase" objects.
* "lowercaseP" is type "pointer to object of type 'lowercase'".
* "lowercaseS" is typedef struct ... lowercaseS.
*
* #define DEBUG to enable all the "know" assertion tests.
* #define SUSPECT when debugging.
* #define COMMON as "extern" for all modules except one, where you #define
* COMMON as "".
* If TEST is #defined, then we are testing a module: #define COMMON as "".
*/
/* These #defines are for parameters of entire assembler. */
/* #define SUSPECT JF remove for speed testing */
/* These #includes are for type definitions etc. */
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free xfree
#define xfree free
#define BAD_CASE(value) \
{ \
as_fatal("Case value %d unexpected at line %d of file \"%s\"\n", \
value, __LINE__, __FILE__); \
}
/* These are assembler-wide concepts */
#ifndef COMMON
#ifdef TEST
#define COMMON /* declare our COMMONs storage here. */
#else
#define COMMON extern /* our commons live elswhere */
#endif
#endif
/* COMMON now defined */
#define DEBUG /* temporary */
#ifdef DEBUG
#undef NDEBUG
#ifndef know
#define know(p) assert(p) /* Verify our assumptions! */
#endif /* not yet defined */
#else
#define know(p) /* know() checks are no-op.ed */
#endif
/* input_scrub.c */
/*
* Supplies sanitised buffers to read.c.
* Also understands printing line-number part of error messages.
*/
/* subsegs.c Sub-segments. Also, segment(=expression type)s.*/
/*
* This table describes the use of segments as EXPRESSION types.
*
* X_seg X_add_symbol X_subtract_symbol X_add_number
* SEG_ABSENT no (legal) expression
* SEG_PASS1 no (defined) "
* SEG_BIG * > 32 bits const.
* SEG_ABSOLUTE 0
* SEG_DATA * 0
* SEG_TEXT * 0
* SEG_BSS * 0
* SEG_UNKNOWN * 0
* SEG_DIFFERENCE 0 * 0
* SEG_REGISTER *
*
* The blank fields MUST be 0, and are nugatory.
* The '0' fields MAY be 0. The '*' fields MAY NOT be 0.
*
* SEG_BIG: X_add_number is < 0 if the result is in
* generic_floating_point_number. The value is -'c' where c is the
* character that introduced the constant. e.g. "0f6.9" will have -'f'
* as a X_add_number value.
* X_add_number > 0 is a count of how many littlenums it took to
* represent a bignum.
* SEG_DIFFERENCE:
* If segments of both symbols are known, they are the same segment.
* X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE).
*/
#ifdef MANY_SEGMENTS
#define N_SEGMENTS 10
#define SEG_NORMAL(x) ((x) >= SEG_E0 && (x) <= SEG_E9)
#define SEG_LIST SEG_E0,SEG_E1,SEG_E2,SEG_E3,SEG_E4,SEG_E5,SEG_E6,SEG_E7,SEG_E8,SEG_E9
#define SEG_DATA SEG_E1
#define SEG_TEXT SEG_E0
#define SEG_BSS SEG_E2
#else
#define N_SEGMENTS 3
#define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
#define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
#endif
typedef enum _segT {
SEG_ABSOLUTE = 0,
SEG_LIST,
SEG_UNKNOWN,
SEG_ABSENT, /* Mythical Segment (absent): NO expression seen. */
SEG_PASS1, /* Mythical Segment: Need another pass. */
SEG_GOOF, /* Only happens if AS has a logic error. */
/* Invented so we don't crash printing */
/* error message involving weird segment. */
SEG_BIG, /* Bigger than 32 bits constant. */
SEG_DIFFERENCE, /* Mythical Segment: absolute difference. */
SEG_DEBUG, /* Debug segment */
SEG_NTV, /* Transfert vector preload segment */
SEG_PTV, /* Transfert vector postload segment */
SEG_REGISTER, /* Mythical: a register-valued expression */
} segT;
#define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
typedef int subsegT;
COMMON subsegT now_subseg;
/* What subseg we are accreting now? */
COMMON segT now_seg;
/* Segment our instructions emit to. */
/* Only OK values are SEG_TEXT or SEG_DATA. */
extern char *const seg_name[];
extern int section_alignment[];
/* relax() */
typedef enum _relax_state {
rs_fill, /* Variable chars to be repeated fr_offset times. Fr_symbol
unused. Used with fr_offset == 0 for a constant length
frag. */
rs_align, /* Align: Fr_offset: power of 2. 1 variable char: fill
character. */
rs_org, /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
character. */
rs_machine_dependent,
#ifndef WORKING_DOT_WORD
rs_broken_word, /* JF: gunpoint */
#endif
} relax_stateT;
/* typedef unsigned char relax_substateT; */
/* JF this is more likely to leave the end of a struct frag on an align
boundry. Be very careful with this. */
typedef unsigned long relax_substateT;
typedef unsigned long relax_addressT;/* Enough bits for address. */
/* Still an integer type. */
/* frags.c */
/*
* 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 /* a code fragment */
{
unsigned long fr_address; /* Object file address. */
struct frag *fr_next; /* Chain forward; ascending address order. */
/* Rooted in frch_root. */
long fr_fix; /* (Fixed) number of chars we know we have. */
/* May be 0. */
long fr_var; /* (Variable) number of chars after above. */
/* May be 0. */
struct symbol *fr_symbol; /* For variable-length tail. */
long fr_offset; /* For variable-length tail. */
char *fr_opcode; /*->opcode low addr byte,for relax()ation*/
relax_stateT fr_type; /* What state is my tail in? */
relax_substateT fr_subtype;
/* These are needed only on the NS32K machines */
char fr_pcrel_adjust;
char fr_bsr;
#ifndef NO_LISTING
struct list_info_struct *line;
#endif
char fr_literal[1]; /* Chars begin here. */
/* One day we will compile fr_literal[0]. */
};
#define SIZEOF_STRUCT_FRAG \
((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
/* We want to say fr_literal[0] above. */
typedef struct frag fragS;
COMMON fragS *frag_now; /* -> current frag we are building. */
/* This frag is incomplete. */
/* It is, however, included in frchain_now. */
/* Frag_now->fr_fix is bogus. Use: */
/* Virtual frag_now->fr_fix == obstack_next_free(&frags)-frag_now->fr_literal.*/
COMMON fragS zero_address_frag; /* For foreign-segment symbol fixups. */
COMMON fragS bss_address_frag; /* For local common (N_BSS segment) fixups. */
/* main program "as.c" (command arguments etc) */
COMMON char
flagseen[128]; /* ['x'] TRUE if "-x" seen. */
COMMON char *
out_file_name; /* name of emitted object file */
COMMON int need_pass_2; /* TRUE if we need a second pass. */
COMMON int picmode; /* TRUE if "-k" or "-K" seen. */
typedef struct {
char * poc_name; /* assembler mnemonic, lower case, no '.' */
void (*poc_handler)(); /* Do the work */
int poc_val; /* Value to pass to handler */
} pseudo_typeS;
#if (__STDC__ == 1) & !defined(NO_STDARG)
int had_errors(void);
int had_warnings(void);
void as_bad(const char *Format, ...);
void as_fatal(const char *Format, ...);
void as_tsktsk(const char *Format, ...);
void as_warn(const char *Format, ...);
#else
int had_errors();
int had_warnings();
void as_bad();
void as_fatal();
void as_tsktsk();
void as_warn();
#endif /* __STDC__ & !NO_STDARG */
#if __STDC__ == 1
char *app_push(void);
char *atof_ieee(char *str, int what_kind, LITTLENUM_TYPE *words);
char *input_scrub_include_file(char *filename, char *position);
char *input_scrub_new_file(char *filename);
char *input_scrub_next_buffer(char **bufp);
char *strstr(const char *s, const char *wanted);
char *xmalloc(int size);
char *xrealloc(char *ptr, long n);
int do_scrub_next_char(int (*get)(), void (*unget)());
int gen_to_words(LITTLENUM_TYPE *words, int precision, long exponent_bits);
int had_err(void);
int had_errors(void);
int had_warnings(void);
int ignore_input(void);
int scrub_from_file(void);
int scrub_from_file(void);
int scrub_from_string(void);
int seen_at_least_1_file(void);
void app_pop(char *arg);
void as_howmuch(FILE *stream);
void as_perror(const char *gripe, const char *filename);
void as_where(char **, unsigned int *);
void bump_line_counters(void);
void do_scrub_begin(void);
void input_scrub_begin(void);
void input_scrub_close(void);
void input_scrub_end(void);
void int_to_gen(long x);
void new_logical_line(char *fname, int line_number);
void scrub_to_file(int ch);
void scrub_to_string(int ch);
void subseg_change(segT seg, int subseg);
void subseg_new(segT seg, subsegT subseg);
void subsegs_begin(void);
#else /* not __STDC__ */
char *app_push();
char *atof_ieee();
char *input_scrub_include_file();
char *input_scrub_new_file();
char *input_scrub_next_buffer();
char *strstr();
char *xmalloc();
char *xrealloc();
int do_scrub_next_char();
int gen_to_words();
int had_err();
int had_errors();
int had_warnings();
int ignore_input();
int scrub_from_file();
int scrub_from_file();
int scrub_from_string();
int seen_at_least_1_file();
void app_pop();
void as_howmuch();
void as_perror();
void as_where();
void bump_line_counters();
void do_scrub_begin();
void input_scrub_begin();
void input_scrub_close();
void input_scrub_end();
void int_to_gen();
void new_logical_line();
void scrub_to_file();
void scrub_to_string();
void subseg_change();
void subseg_new();
void subsegs_begin();
#endif /* not __STDC__ */
/* this one starts the chain of target dependant headers */
#include "targ-env.h"
#include "expr.h"
#include "struc-symbol.h"
#include "write.h"
#include "frags.h"
#include "hash.h"
#include "read.h"
#include "symbols.h"
#include "tc.h"
#include "obj.h"
#include "listing.h"
/*
* Local Variables:
* comment-column: 0
* fill-column: 131
* End:
*/
/* end of as.h */