gas/as.h

   1 /* as.h - global header file
   2    Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to
  18    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #ifndef GAS
  21 #define GAS 1
  22 /*
  23  * I think this stuff is largely out of date.  xoxorich.
  24  *
  25  * CAPITALISED names are #defined.
  26  * "lowercaseH" is #defined if "lowercase.h" has been #include-d.
  27  * "lowercaseT" is a typedef of "lowercase" objects.
  28  * "lowercaseP" is type "pointer to object of type 'lowercase'".
  29  * "lowercaseS" is typedef struct ... lowercaseS.
  30  *
  31  * #define DEBUG to enable all the "know" assertion tests.
  32  * #define SUSPECT when debugging hash code.
  33  * #define COMMON as "extern" for all modules except one, where you #define
  34  *      COMMON as "".
  35  * If TEST is #defined, then we are testing a module: #define COMMON as "".
  36  */
  37
  38 /* These #defines are for parameters of entire assembler. */
  39
  40 /* These #includes are for type definitions etc. */
  41
  42 #include "config.h"
  43
  44 #include <stdio.h>
  45 #ifdef DEBUG
  46 #undef NDEBUG
  47 #endif
  48 #include <assert.h>
  49
  50 #include <ansidecl.h>
  51 #ifdef BFD_ASSEMBLER
  52 #include <bfd.h>
  53 #endif
  54 #include "host.h"
  55 #include "flonum.h"
  56
  57 /* Make Saber happier on obstack.h.  */
  58 #ifdef SABER
  59 #undef  __PTR_TO_INT
  60 #define __PTR_TO_INT(P) ((int)(P))
  61 #undef  __INT_TO_PTR
  62 #define __INT_TO_PTR(P) ((char *)(P))
  63 #endif
  64
  65 #ifndef __LINE__
  66 #define __LINE__ "unknown"
  67 #endif /* __LINE__ */
  68
  69 #ifndef __FILE__
  70 #define __FILE__ "unknown"
  71 #endif /* __FILE__ */
  72
  73 #ifndef __STDC__
  74 #ifndef const
  75 #define const
  76 #endif
  77 #ifndef volatile
  78 #define volatile
  79 #endif
  80 #endif /* ! __STDC__ */
  81
  82 #if !defined (__GNUC__) && !defined (inline)
  83 #define inline
  84 #endif
  85
  86 #ifndef FOPEN_WB
  87 #include "fopen-same.h"
  88 #endif
  89
  90 #define obstack_chunk_alloc xmalloc
  91 #define obstack_chunk_free xfree
  92
  93 #define xfree free
  94
  95 #define BAD_CASE(val) \
  96 { \
  97       as_fatal("Case value %ld unexpected at line %d of file \"%s\"\n", \
  98                (long) val, __LINE__, __FILE__); \
  99            }
 100
 101 /* Version 2.1 of Solaris had problems with this declaration, but I
 102    think that bug has since been fixed.  If it causes problems on your
 103    system, just delete it.  */
 104 extern char *strstr ();
 105 \f
 106
 107 /* These are assembler-wide concepts */
 108
 109 #ifdef BFD_ASSEMBLER
 110 extern bfd *stdoutput;
 111 typedef bfd_vma addressT;
 112 typedef bfd_signed_vma offsetT;
 113 #else
 114 typedef unsigned long addressT;
 115 typedef long offsetT;
 116 #endif
 117
 118 /* Type of symbol value, etc.  For use in prototypes.  */
 119 typedef addressT valueT;
 120
 121 #ifndef COMMON
 122 #ifdef TEST
 123 #define COMMON                  /* declare our COMMONs storage here. */
 124 #else
 125 #define COMMON extern           /* our commons live elswhere */
 126 #endif
 127 #endif
 128 /* COMMON now defined */
 129
 130 #ifdef DEBUG
 131 #ifndef know
 132 #define know(p) assert(p)       /* Verify our assumptions! */
 133 #endif /* not yet defined */
 134 #else
 135 #define know(p)                 /* know() checks are no-op.ed */
 136 #endif
 137
 138 #if defined (BROKEN_ASSERT) && !defined (NDEBUG)
 139 /* Used on machines where the "assert" macro is buggy.  (For example, on the
 140    RS/6000, Reiser-cpp substitution is done to put the condition into a
 141    string, so if the condition contains a string, parse errors result.)  If
 142    the condition fails, just drop core file.  */
 143 #undef assert
 144 #define assert(p) ((p) ? 0 : (abort (), 0))
 145 #endif
 146 \f
 147 /* input_scrub.c */
 148
 149 /*
 150  * Supplies sanitised buffers to read.c.
 151  * Also understands printing line-number part of error messages.
 152  */
 153 \f
 154
 155 /* subsegs.c     Sub-segments. Also, segment(=expression type)s.*/
 156
 157 #ifndef BFD_ASSEMBLER
 158
 159 #ifdef MANY_SEGMENTS
 160 #include "bfd.h"
 161 #define N_SEGMENTS 10
 162 #define SEG_NORMAL(x) ((x) >= SEG_E0 && (x) <= SEG_E9)
 163 #define SEG_LIST SEG_E0,SEG_E1,SEG_E2,SEG_E3,SEG_E4,SEG_E5,SEG_E6,SEG_E7,SEG_E8,SEG_E9
 164 #define SEG_TEXT SEG_E0
 165 #define SEG_DATA SEG_E1
 166 #define SEG_BSS SEG_E2
 167 #else
 168 #define N_SEGMENTS 3
 169 #define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
 170 #define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
 171 #endif
 172
 173 typedef enum _segT
 174   {
 175     SEG_ABSOLUTE = 0,
 176     SEG_LIST,
 177     SEG_UNKNOWN,
 178     SEG_GOOF,                   /* Only happens if AS has a logic error. */
 179     /* Invented so we don't crash printing */
 180     /* error message involving weird segment. */
 181     SEG_EXPR,                   /* Intermediate expression values. */
 182     SEG_DEBUG,                  /* Debug segment */
 183     SEG_NTV,                    /* Transfert vector preload segment */
 184     SEG_PTV,                    /* Transfert vector postload segment */
 185     SEG_REGISTER                /* Mythical: a register-valued expression */
 186   } segT;
 187
 188 #define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
 189 #else
 190 typedef asection *segT;
 191 #define SEG_NORMAL(SEG)         ((SEG) != absolute_section      \
 192                                  && (SEG) != undefined_section  \
 193                                  && (SEG) != reg_section        \
 194                                  && (SEG) != expr_section)
 195 #endif
 196 typedef int subsegT;
 197
 198 /* What subseg we are accreting now? */
 199 COMMON subsegT now_subseg;
 200
 201 /* Segment our instructions emit to. */
 202 COMMON segT now_seg;
 203
 204 #ifdef BFD_ASSEMBLER
 205 #define segment_name(SEG)       bfd_get_section_name (stdoutput, SEG)
 206 #else
 207 extern char *const seg_name[];
 208 #define segment_name(SEG)       seg_name[(int) (SEG)]
 209 #endif
 210
 211 #ifndef BFD_ASSEMBLER
 212 extern int section_alignment[];
 213 #endif
 214
 215 #ifdef BFD_ASSEMBLER
 216 extern segT reg_section, expr_section;
 217 /* Shouldn't these be eliminated someday?  */
 218 extern segT text_section, data_section, bss_section;
 219 #define absolute_section        (&bfd_abs_section)
 220 #define undefined_section       (&bfd_und_section)
 221 #else
 222 #define reg_section             SEG_REGISTER
 223 #define expr_section            SEG_EXPR
 224 #define text_section            SEG_TEXT
 225 #define data_section            SEG_DATA
 226 #define bss_section             SEG_BSS
 227 #define absolute_section        SEG_ABSOLUTE
 228 #define undefined_section       SEG_UNKNOWN
 229 #endif
 230
 231 /* relax() */
 232
 233 typedef enum _relax_state
 234   {
 235     /* Variable chars to be repeated fr_offset times.
 236        Fr_symbol unused. Used with fr_offset == 0 for a
 237        constant length frag. */
 238     rs_fill = 1,
 239
 240     /* Align: Fr_offset: power of 2.  Variable chars: fill pattern. */
 241     rs_align,
 242
 243     /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
 244        character. */
 245     rs_org,
 246
 247     rs_machine_dependent
 248
 249 #ifndef WORKING_DOT_WORD
 250     /* JF: gunpoint */
 251       , rs_broken_word
 252 #endif
 253   } relax_stateT;
 254
 255 /* typedef unsigned char relax_substateT; */
 256 /* JF this is more likely to leave the end of a struct frag on an align
 257    boundry.  Be very careful with this.  */
 258 typedef unsigned long relax_substateT;
 259
 260 /* Enough bits for address, but still an integer type.
 261    Could be a problem, cross-assembling for 64-bit machines.  */
 262 typedef addressT relax_addressT;
 263 \f
 264
 265 /* frags.c */
 266
 267 /*
 268  * A code fragment (frag) is some known number of chars, followed by some
 269  * unknown number of chars. Typically the unknown number of chars is an
 270  * instruction address whose size is yet unknown. We always know the greatest
 271  * possible size the unknown number of chars may become, and reserve that
 272  * much room at the end of the frag.
 273  * Once created, frags do not change address during assembly.
 274  * We chain the frags in (a) forward-linked list(s). The object-file address
 275  * of the 1st char of a frag is generally not known until after relax().
 276  * Many things at assembly time describe an address by {object-file-address
 277  * of a particular frag}+offset.
 278
 279  BUG: it may be smarter to have a single pointer off to various different
 280  notes for different frag kinds. See how code pans
 281  */
 282 struct frag
 283 {
 284   /* Object file address. */
 285   addressT fr_address;
 286   /* Chain forward; ascending address order.  Rooted in frch_root. */
 287   struct frag *fr_next;
 288
 289   /* (Fixed) number of chars we know we have.  May be 0. */
 290   offsetT fr_fix;
 291   /* (Variable) number of chars after above.  May be 0. */
 292   offsetT fr_var;
 293   /* For variable-length tail. */
 294   struct symbol *fr_symbol;
 295   /* For variable-length tail. */
 296   offsetT fr_offset;
 297   /* Points to opcode low addr byte, for relaxation.  */
 298   char *fr_opcode;
 299
 300 #ifndef NO_LISTING
 301   struct list_info_struct *line;
 302 #endif
 303
 304   /* What state is my tail in? */
 305   relax_stateT fr_type;
 306   relax_substateT fr_subtype;
 307
 308   /* These are needed only on the NS32K machines */
 309   char fr_pcrel_adjust;
 310   char fr_bsr;
 311
 312   /* Chars begin here.
 313      One day we will compile fr_literal[0]. */
 314   char fr_literal[1];
 315 };
 316
 317 #define SIZEOF_STRUCT_FRAG \
 318 ((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
 319 /* We want to say fr_literal[0] above. */
 320
 321 typedef struct frag fragS;
 322
 323 /* Current frag we are building.  This frag is incomplete.  It is, however,
 324    included in frchain_now.  The fr_fix field is bogus; instead, use:
 325    obstack_next_free(&frags)-frag_now->fr_literal.  */
 326 COMMON fragS *frag_now;
 327 #define frag_now_fix() ((char*)obstack_next_free (&frags) - frag_now->fr_literal)
 328
 329 /* For foreign-segment symbol fixups. */
 330 COMMON fragS zero_address_frag;
 331 /* For local common (N_BSS segment) fixups. */
 332 COMMON fragS bss_address_frag;
 333
 334 /* main program "as.c" (command arguments etc) */
 335
 336 /* ['x'] TRUE if "-x" seen. */
 337 COMMON char flagseen[128];
 338 COMMON unsigned char flag_readonly_data_in_text;
 339 COMMON unsigned char flag_suppress_warnings;
 340 COMMON unsigned char flag_always_generate_output;
 341
 342 /* name of emitted object file */
 343 COMMON char *out_file_name;
 344
 345 /* TRUE if we need a second pass. */
 346 COMMON int need_pass_2;
 347
 348 /* TRUE if we should do no relaxing, and
 349    leave lots of padding.  */
 350 COMMON int linkrelax;
 351
 352 /* TRUE if we should produce a listing.  */
 353 extern int listing;
 354
 355 struct _pseudo_type
 356   {
 357     /* assembler mnemonic, lower case, no '.' */
 358     char *poc_name;
 359     /* Do the work */
 360     void (*poc_handler) PARAMS ((int));
 361     /* Value to pass to handler */
 362     int poc_val;
 363   };
 364
 365 typedef struct _pseudo_type pseudo_typeS;
 366
 367 #ifdef BFD_ASSEMBLER_xxx
 368 struct lineno_struct
 369   {
 370     alent line;
 371     fragS *frag;
 372     struct lineno_struct *next;
 373   };
 374 typedef struct lineno_struct lineno;
 375 #endif
 376
 377 #if defined (__STDC__) && !defined(NO_STDARG)
 378
 379 #if __GNUC__ >= 2
 380 /* for use with -Wformat */
 381 #define PRINTF_LIKE(FCN)        void FCN (const char *format, ...) \
 382                                         __attribute__ ((format (printf, 1, 2)))
 383 #define PRINTF_WHERE_LIKE(FCN)  void FCN (char *file, unsigned int line, \
 384                                           const char *format, ...) \
 385                                         __attribute__ ((format (printf, 3, 4)))
 386 #else /* ANSI C with stdarg, but not GNU C */
 387 #define PRINTF_LIKE(FCN)        void FCN (const char *format, ...)
 388 #define PRINTF_WHERE_LIKE(FCN)  void FCN (char *file, unsigned int line, \
 389                                           const char *format, ...)
 390 #endif
 391 #else /* not ANSI C, or not stdarg */
 392 #define PRINTF_LIKE(FCN)        void FCN ()
 393 #define PRINTF_WHERE_LIKE(FCN)  void FCN ()
 394 #endif
 395
 396 PRINTF_LIKE (as_bad);
 397 PRINTF_LIKE (as_fatal);
 398 PRINTF_LIKE (as_tsktsk);
 399 PRINTF_LIKE (as_warn);
 400 PRINTF_WHERE_LIKE (as_bad_where);
 401 PRINTF_WHERE_LIKE (as_warn_where);
 402
 403 void fprint_value PARAMS ((FILE *file, addressT value));
 404 void sprint_value PARAMS ((char *buf, addressT value));
 405
 406 int had_errors PARAMS ((void));
 407 int had_warnings PARAMS ((void));
 408
 409 void print_version_id PARAMS ((void));
 410 char *app_push PARAMS ((void));
 411 char *atof_ieee PARAMS ((char *str, int what_kind, LITTLENUM_TYPE * words));
 412 char *input_scrub_include_file PARAMS ((char *filename, char *position));
 413 char *input_scrub_new_file PARAMS ((char *filename));
 414 char *input_scrub_next_buffer PARAMS ((char **bufp));
 415 PTR xmalloc PARAMS ((unsigned long size));
 416 PTR xrealloc PARAMS ((PTR ptr, unsigned long n));
 417 int do_scrub_next_char PARAMS ((int (*get) (void), void (*unget) (int)));
 418 int gen_to_words PARAMS ((LITTLENUM_TYPE * words, int precision,
 419                           long exponent_bits));
 420 int had_err PARAMS ((void));
 421 int ignore_input PARAMS ((void));
 422 int scrub_from_file PARAMS ((void));
 423 int scrub_from_string PARAMS ((void));
 424 int seen_at_least_1_file PARAMS ((void));
 425 void app_pop PARAMS ((char *arg));
 426 void as_howmuch PARAMS ((FILE * stream));
 427 void as_perror PARAMS ((const char *gripe, const char *filename));
 428 void as_where PARAMS ((char **namep, unsigned int *linep));
 429 void bump_line_counters PARAMS ((void));
 430 void do_scrub_begin PARAMS ((void));
 431 void input_scrub_begin PARAMS ((void));
 432 void input_scrub_close PARAMS ((void));
 433 void input_scrub_end PARAMS ((void));
 434 void new_logical_line PARAMS ((char *fname, int line_number));
 435 void scrub_to_file PARAMS ((int ch));
 436 void scrub_to_string PARAMS ((int ch));
 437 void subsegs_begin PARAMS ((void));
 438 void subseg_change PARAMS ((segT seg, int subseg));
 439 segT subseg_new PARAMS ((const char *name, subsegT subseg));
 440 segT subseg_force_new PARAMS ((const char *name, subsegT subseg));
 441 void subseg_set PARAMS ((segT seg, subsegT subseg));
 442 #ifdef BFD_ASSEMBLER
 443 segT subseg_get PARAMS ((const char *, int));
 444 #endif
 445
 446 struct expressionS;
 447 struct fix;
 448 struct symbol;
 449
 450 #ifdef BFD_ASSEMBLER
 451 /* literal.c */
 452 valueT add_to_literal_pool PARAMS ((struct symbol *, valueT, segT, int));
 453 #endif
 454
 455 /* this one starts the chain of target dependant headers */
 456 #include "targ-env.h"
 457
 458 #include "expr.h"
 459 #include "struc-symbol.h"
 460 #include "write.h"
 461 #include "frags.h"
 462 #include "hash.h"
 463 #include "read.h"
 464 #include "symbols.h"
 465
 466 #include "tc.h"
 467 #include "obj.h"
 468
 469 #include "listing.h"
 470
 471 #ifdef BFD_ASSEMBLER
 472 /* Someday perhaps this will be selectable at run-time.  */
 473 #if defined (OBJ_AOUT) || defined (OBJ_BOUT)
 474 #define OUTPUT_FLAVOR bfd_target_aout_flavour
 475 #endif
 476 #ifdef OBJ_COFF
 477 #define OUTPUT_FLAVOR bfd_target_coff_flavour
 478 #endif
 479 #ifdef OBJ_ECOFF
 480 #define OUTPUT_FLAVOR bfd_target_ecoff_flavour
 481 #endif
 482 #ifdef OBJ_ELF
 483 #define OUTPUT_FLAVOR bfd_target_elf_flavour
 484 #endif
 485 #endif /* BFD_ASSEMBLER */
 486
 487 #endif /* GAS */
 488
 489 /* end of as.h */