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