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- /* 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
- /*
- * I think this stuff is largely out of date.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 hash code.
- * #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 DEBUG /* temporary */
- /* These #includes are for type definitions etc. */
-
- #include <stdio.h>
- #ifdef DEBUG
- #undef NDEBUG
- #endif
- #include <assert.h>
-
- #include <ansidecl.h>
- #ifdef BFD_ASSEMBLER
- #include <bfd.h>
- #endif
- #include "host.h"
- #include "flonum.h"
-
- #ifndef __LINE__
- #define __LINE__ "unknown"
- #endif /* __LINE__ */
-
- #ifndef __FILE__
- #define __FILE__ "unknown"
- #endif /* __FILE__ */
-
- #ifndef __STDC__
- #ifndef const
- #define const
- #endif
- #ifndef volatile
- #define volatile
- #endif
- #endif /* ! __STDC__ */
-
- #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 */
-
- #ifdef BFD_ASSEMBLER
- extern bfd *stdoutput;
- #endif
-
- #ifndef COMMON
- #ifdef TEST
- #define COMMON /* declare our COMMONs storage here. */
- #else
- #define COMMON extern /* our commons live elswhere */
- #endif
- #endif
- /* COMMON now defined */
-
- #ifdef DEBUG
- #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
-
- #if defined (BROKEN_ASSERT) && !defined (NDEBUG)
- /* Used on machines where the "assert" macro is buggy. (For example, on the
- RS/6000, Reiser-cpp substitution is done to put the condition into a
- string, so if the condition contains a string, parse errors result.) If
- the condition fails, just drop core file. */
- #undef assert
- #define assert(p) ((p) ? 0 : (abort (), 0))
- #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.*/
-
- #ifndef BFD_ASSEMBLER
- /*
- * 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
- #include "bfd.h"
- #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_TEXT SEG_E0
- #define SEG_DATA SEG_E1
- #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)
- #else
- typedef asection *segT;
- #define SEG_NORMAL(SEG) ((SEG) != absolute_section \
- && (SEG) != undefined_section \
- && (SEG) != big_section \
- && (SEG) != reg_section \
- && (SEG) != pass1_section \
- && (SEG) != diff_section \
- && (SEG) != absent_section)
- #endif
- typedef int subsegT;
-
- /* What subseg we are accreting now? */
- COMMON subsegT now_subseg;
-
- /* Segment our instructions emit to. */
- COMMON segT now_seg;
-
- #ifdef BFD_ASSEMBLER
- #define segment_name(SEG) bfd_get_section_name (stdoutput, SEG)
- #else
- extern char *const seg_name[];
- #define segment_name(SEG) seg_name[(int) (SEG)]
- #endif
-
- #ifndef BFD_ASSEMBLER
- extern int section_alignment[];
- #endif
-
- #ifdef BFD_ASSEMBLER
- extern segT big_section, reg_section, pass1_section;
- extern segT diff_section, absent_section;
- /* Shouldn't these be eliminated someday? */
- extern segT text_section, data_section, bss_section;
- #define absolute_section (&bfd_abs_section)
- #define undefined_section (&bfd_und_section)
- #else
- #define big_section SEG_BIG
- #define reg_section SEG_REGISTER
- #define pass1_section SEG_PASS1
- #define diff_section SEG_DIFFERENCE
- #define absent_section SEG_ABSENT
- #define text_section SEG_TEXT
- #define data_section SEG_DATA
- #define bss_section SEG_BSS
- #define absolute_section SEG_ABSOLUTE
- #define undefined_section SEG_UNKNOWN
- #endif
-
- /* relax() */
-
- typedef enum _relax_state
- {
- /* Variable chars to be repeated fr_offset times.
- Fr_symbol unused. Used with fr_offset == 0 for a
- constant length frag. */
- rs_fill = 1,
-
- /* Align: Fr_offset: power of 2. 1 variable char: fill character. */
- rs_align,
-
- /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
- character. */
- rs_org,
-
- rs_machine_dependent,
-
- #ifndef WORKING_DOT_WORD
- /* JF: gunpoint */
- rs_broken_word,
- #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;
-
- /* Enough bits for address, but still an integer type.
- Could be a problem, cross-assembling for 64-bit machines. */
- typedef unsigned long relax_addressT;
-
-
- /* 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
- {
- /* Object file address. */
- unsigned long fr_address;
- /* Chain forward; ascending address order. Rooted in frch_root. */
- struct frag *fr_next;
-
- /* (Fixed) number of chars we know we have. May be 0. */
- long fr_fix;
- /* (Variable) number of chars after above. May be 0. */
- long fr_var;
- /* For variable-length tail. */
- struct symbol *fr_symbol;
- /* For variable-length tail. */
- long 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;
-
- /* These are needed only on the NS32K machines */
- char fr_pcrel_adjust;
- char fr_bsr;
-
- /* Chars begin here.
- One day we will compile fr_literal[0]. */
- char fr_literal[1];
- };
-
- #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;
-
- /* Current frag we are building. This frag is incomplete. It is, however,
- included in frchain_now. The fr_fix field is bogus; instead, use:
- obstack_next_free(&frags)-frag_now->fr_literal. */
- COMMON fragS *frag_now;
- #define frag_now_fix() (obstack_next_free (&frags) - frag_now->fr_literal)
-
- /* For foreign-segment symbol fixups. */
- COMMON fragS zero_address_frag;
- /* For local common (N_BSS segment) fixups. */
- COMMON fragS bss_address_frag;
-
- /* main program "as.c" (command arguments etc) */
-
- /* ['x'] TRUE if "-x" seen. */
- COMMON char flagseen[128];
- COMMON unsigned char flag_readonly_data_in_text;
- COMMON unsigned char flag_suppress_warnings;
- COMMON unsigned char flag_always_generate_output;
-
- /* name of emitted object file */
- COMMON char *out_file_name;
-
- /* TRUE if we need a second pass. */
- COMMON int need_pass_2;
-
- /* TRUE if we should do no relaxing, and
- leave lots of padding. */
- COMMON int linkrelax;
-
- struct _pseudo_type
- {
- /* assembler mnemonic, lower case, no '.' */
- char *poc_name;
- /* Do the work */
- void (*poc_handler) ();
- /* Value to pass to handler */
- int poc_val;
- };
-
- typedef struct _pseudo_type pseudo_typeS;
-
- #ifdef BFD_ASSEMBLER_xxx
- struct lineno_struct
- {
- alent line;
- fragS *frag;
- struct lineno_struct *next;
- };
- typedef struct lineno_struct lineno;
- #endif
-
- #if defined (__STDC__) && !defined(NO_STDARG)
-
- #if __GNUC__ >= 2
- /* for use with -Wformat */
- #define PRINTF_LIKE(FCN) void FCN (const char *Format, ...) \
- __attribute__ ((format (printf, 1, 2)))
- #else /* ANSI C with stdarg, but not GNU C */
- #define PRINTF_LIKE(FCN) void FCN (const char *Format, ...)
- #endif
- #else /* not ANSI C, or not stdarg */
- #define PRINTF_LIKE(FCN) void FCN ()
- #endif
-
- PRINTF_LIKE (as_bad);
- PRINTF_LIKE (as_fatal);
- PRINTF_LIKE (as_tsktsk);
- PRINTF_LIKE (as_warn);
-
- int had_errors PARAMS ((void));
- int had_warnings PARAMS ((void));
-
- char *app_push PARAMS ((void));
- char *atof_ieee PARAMS ((char *str, int what_kind, LITTLENUM_TYPE * words));
- char *input_scrub_include_file PARAMS ((char *filename, char *position));
- char *input_scrub_new_file PARAMS ((char *filename));
- char *input_scrub_next_buffer PARAMS ((char **bufp));
- char *strstr PARAMS ((const char *s, const char *wanted));
- char *xmalloc PARAMS ((long size));
- char *xrealloc PARAMS ((char *ptr, long n));
- int do_scrub_next_char PARAMS ((int (*get) (), void (*unget) ()));
- int gen_to_words PARAMS ((LITTLENUM_TYPE * words, int precision,
- long exponent_bits));
- int had_err PARAMS ((void));
- int had_errors PARAMS ((void));
- int had_warnings PARAMS ((void));
- int ignore_input PARAMS ((void));
- int scrub_from_file PARAMS ((void));
- int scrub_from_file PARAMS ((void));
- int scrub_from_string PARAMS ((void));
- int seen_at_least_1_file PARAMS ((void));
- void app_pop PARAMS ((char *arg));
- void as_howmuch PARAMS ((FILE * stream));
- void as_perror PARAMS ((char *gripe, char *filename));
- void as_where PARAMS ((void));
- void bump_line_counters PARAMS ((void));
- void do_scrub_begin PARAMS ((void));
- void input_scrub_begin PARAMS ((void));
- void input_scrub_close PARAMS ((void));
- void input_scrub_end PARAMS ((void));
- void int_to_gen PARAMS ((long x));
- void new_logical_line PARAMS ((char *fname, int line_number));
- void scrub_to_file PARAMS ((int ch));
- void scrub_to_string PARAMS ((int ch));
- void subsegs_begin PARAMS ((void));
- void subseg_change PARAMS ((segT seg, int subseg));
- #ifdef BFD_ASSEMBLER
- segT subseg_new PARAMS ((char *name, subsegT subseg));
- void subseg_set PARAMS ((segT seg, subsegT subseg));
- #else
- void subseg_new PARAMS ((segT seg, subsegT subseg));
- #endif
-
- /* this one starts the chain of target dependant headers */
- #include "targ-env.h"
-
- /* these define types needed by the interfaces */
- #include "struc-symbol.h"
-
- #include "write.h"
- #include "expr.h"
- #include "frags.h"
- #include "hash.h"
- #include "read.h"
- #include "symbols.h"
-
- #include "tc.h"
- #include "obj.h"
-
- #include "listing.h"
-
- #ifdef BFD_ASSEMBLER
- /* Someday perhaps this will be selectable at run-time. */
- #if defined (OBJ_AOUT) || defined (OBJ_BOUT)
- #define OUTPUT_FLAVOR bfd_target_aout_flavour
- #endif
- #ifdef OBJ_COFF
- #define OUTPUT_FLAVOR bfd_target_coff_flavour
- #endif
- #ifdef OBJ_ECOFF
- #define OUTPUT_FLAVOR bfd_target_ecoff_flavour
- #endif
- #ifdef OBJ_ELF
- #define OUTPUT_FLAVOR bfd_target_elf_flavour
- #endif
- #endif /* BFD_ASSEMBLER */
-
- /* end of as.h */
-