1 /* as.h - global header file
2 Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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)
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.
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. */
23 * I think this stuff is largely out of date. xoxorich.
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.
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
35 * If TEST is #defined, then we are testing a module: #define COMMON as "".
38 /* These #defines are for parameters of entire assembler. */
40 /* These #includes are for type definitions etc. */
57 /* Make Saber happier on obstack.h. */
60 #define __PTR_TO_INT(P) ((int)(P))
62 #define __INT_TO_PTR(P) ((char *)(P))
66 #define __LINE__ "unknown"
70 #define __FILE__ "unknown"
80 #endif /* ! __STDC__ */
82 #if !defined (__GNUC__) && !defined (inline)
87 #include "fopen-same.h"
90 #define obstack_chunk_alloc xmalloc
91 #define obstack_chunk_free xfree
95 #define BAD_CASE(val) \
97 as_fatal("Case value %ld unexpected at line %d of file \"%s\"\n", \
98 (long) val, __LINE__, __FILE__); \
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 ();
107 /* These are assembler-wide concepts */
110 extern bfd *stdoutput;
111 typedef bfd_vma addressT;
112 typedef bfd_signed_vma offsetT;
114 typedef unsigned long addressT;
115 typedef long offsetT;
118 /* Type of symbol value, etc. For use in prototypes. */
119 typedef addressT valueT;
123 #define COMMON /* declare our COMMONs storage here. */
125 #define COMMON extern /* our commons live elswhere */
128 /* COMMON now defined */
132 #define know(p) assert(p) /* Verify our assumptions! */
133 #endif /* not yet defined */
135 #define know(p) /* know() checks are no-op.ed */
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. */
144 #define assert(p) ((p) ? 0 : (abort (), 0))
150 * Supplies sanitised buffers to read.c.
151 * Also understands printing line-number part of error messages.
155 /* subsegs.c Sub-segments. Also, segment(=expression type)s.*/
157 #ifndef BFD_ASSEMBLER
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
169 #define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
170 #define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
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 */
188 #define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
190 typedef asection *segT;
191 #define SEG_NORMAL(SEG) ((SEG) != absolute_section \
192 && (SEG) != undefined_section \
193 && (SEG) != reg_section \
194 && (SEG) != expr_section)
198 /* What subseg we are accreting now? */
199 COMMON subsegT now_subseg;
201 /* Segment our instructions emit to. */
205 #define segment_name(SEG) bfd_get_section_name (stdoutput, SEG)
207 extern char *const seg_name[];
208 #define segment_name(SEG) seg_name[(int) (SEG)]
211 #ifndef BFD_ASSEMBLER
212 extern int section_alignment[];
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)
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
233 typedef enum _relax_state
235 /* Variable chars to be repeated fr_offset times.
236 Fr_symbol unused. Used with fr_offset == 0 for a
237 constant length frag. */
240 /* Align: Fr_offset: power of 2. Variable chars: fill pattern. */
243 /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
249 #ifndef WORKING_DOT_WORD
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;
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;
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.
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
284 /* Object file address. */
286 /* Chain forward; ascending address order. Rooted in frch_root. */
287 struct frag *fr_next;
289 /* (Fixed) number of chars we know we have. May be 0. */
291 /* (Variable) number of chars after above. May be 0. */
293 /* For variable-length tail. */
294 struct symbol *fr_symbol;
295 /* For variable-length tail. */
297 /* Points to opcode low addr byte, for relaxation. */
301 struct list_info_struct *line;
304 /* What state is my tail in? */
305 relax_stateT fr_type;
306 relax_substateT fr_subtype;
308 /* These are needed only on the NS32K machines */
309 char fr_pcrel_adjust;
313 One day we will compile fr_literal[0]. */
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. */
321 typedef struct frag fragS;
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)
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;
334 /* main program "as.c" (command arguments etc) */
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;
342 /* name of emitted object file */
343 COMMON char *out_file_name;
345 /* TRUE if we need a second pass. */
346 COMMON int need_pass_2;
348 /* TRUE if we should do no relaxing, and
349 leave lots of padding. */
350 COMMON int linkrelax;
352 /* TRUE if we should produce a listing. */
357 /* assembler mnemonic, lower case, no '.' */
360 void (*poc_handler) PARAMS ((int));
361 /* Value to pass to handler */
365 typedef struct _pseudo_type pseudo_typeS;
367 #ifdef BFD_ASSEMBLER_xxx
372 struct lineno_struct *next;
374 typedef struct lineno_struct lineno;
377 #if defined (__STDC__) && !defined(NO_STDARG)
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, ...)
391 #else /* not ANSI C, or not stdarg */
392 #define PRINTF_LIKE(FCN) void FCN ()
393 #define PRINTF_WHERE_LIKE(FCN) void FCN ()
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);
403 void fprint_value PARAMS ((FILE *file, addressT value));
404 void sprint_value PARAMS ((char *buf, addressT value));
406 int had_errors PARAMS ((void));
407 int had_warnings PARAMS ((void));
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));
443 segT subseg_get PARAMS ((const char *, int));
452 valueT add_to_literal_pool PARAMS ((struct symbol *, valueT, segT, int));
455 /* this one starts the chain of target dependant headers */
456 #include "targ-env.h"
459 #include "struc-symbol.h"
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
477 #define OUTPUT_FLAVOR bfd_target_coff_flavour
480 #define OUTPUT_FLAVOR bfd_target_ecoff_flavour
483 #define OUTPUT_FLAVOR bfd_target_elf_flavour
485 #endif /* BFD_ASSEMBLER */