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. */
21 * $FreeBSD: src/gnu/usr.bin/as/as.h,v 1.8 1999/08/27 23:34:12 peter Exp $
22 * $DragonFly: src/gnu/usr.bin/as/Attic/as.h,v 1.2 2003/06/17 04:25:44 dillon Exp $
26 /* #include <ansidecl.h> */
38 #define alloca __builtin_alloca
43 #define __LINE__ "unknown"
47 #define __FILE__ "unknown"
59 * I think this stuff is largely out of date. xoxorich.
61 * CAPITALISED names are #defined.
62 * "lowercaseH" is #defined if "lowercase.h" has been #include-d.
63 * "lowercaseT" is a typedef of "lowercase" objects.
64 * "lowercaseP" is type "pointer to object of type 'lowercase'".
65 * "lowercaseS" is typedef struct ... lowercaseS.
67 * #define DEBUG to enable all the "know" assertion tests.
68 * #define SUSPECT when debugging.
69 * #define COMMON as "extern" for all modules except one, where you #define
71 * If TEST is #defined, then we are testing a module: #define COMMON as "".
74 /* These #defines are for parameters of entire assembler. */
76 /* #define SUSPECT JF remove for speed testing */
77 /* These #includes are for type definitions etc. */
83 #define obstack_chunk_alloc xmalloc
84 #define obstack_chunk_free xfree
88 #define BAD_CASE(value) \
90 as_fatal("Case value %d unexpected at line %d of file \"%s\"\n", \
91 value, __LINE__, __FILE__); \
95 /* These are assembler-wide concepts */
100 #define COMMON /* declare our COMMONs storage here. */
102 #define COMMON extern /* our commons live elswhere */
105 /* COMMON now defined */
106 #define DEBUG /* temporary */
111 #define know(p) assert(p) /* Verify our assumptions! */
112 #endif /* not yet defined */
114 #define know(p) /* know() checks are no-op.ed */
120 * Supplies sanitised buffers to read.c.
121 * Also understands printing line-number part of error messages.
125 /* subsegs.c Sub-segments. Also, segment(=expression type)s.*/
128 * This table describes the use of segments as EXPRESSION types.
130 * X_seg X_add_symbol X_subtract_symbol X_add_number
131 * SEG_ABSENT no (legal) expression
132 * SEG_PASS1 no (defined) "
133 * SEG_BIG * > 32 bits const.
139 * SEG_DIFFERENCE 0 * 0
142 * The blank fields MUST be 0, and are nugatory.
143 * The '0' fields MAY be 0. The '*' fields MAY NOT be 0.
145 * SEG_BIG: X_add_number is < 0 if the result is in
146 * generic_floating_point_number. The value is -'c' where c is the
147 * character that introduced the constant. e.g. "0f6.9" will have -'f'
148 * as a X_add_number value.
149 * X_add_number > 0 is a count of how many littlenums it took to
150 * represent a bignum.
152 * If segments of both symbols are known, they are the same segment.
153 * X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE).
158 #define N_SEGMENTS 10
159 #define SEG_NORMAL(x) ((x) >= SEG_E0 && (x) <= SEG_E9)
160 #define SEG_LIST SEG_E0,SEG_E1,SEG_E2,SEG_E3,SEG_E4,SEG_E5,SEG_E6,SEG_E7,SEG_E8,SEG_E9
161 #define SEG_DATA SEG_E1
162 #define SEG_TEXT SEG_E0
163 #define SEG_BSS SEG_E2
166 #define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
167 #define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
174 SEG_ABSENT, /* Mythical Segment (absent): NO expression seen. */
175 SEG_PASS1, /* Mythical Segment: Need another pass. */
176 SEG_GOOF, /* Only happens if AS has a logic error. */
177 /* Invented so we don't crash printing */
178 /* error message involving weird segment. */
179 SEG_BIG, /* Bigger than 32 bits constant. */
180 SEG_DIFFERENCE, /* Mythical Segment: absolute difference. */
181 SEG_DEBUG, /* Debug segment */
182 SEG_NTV, /* Transfert vector preload segment */
183 SEG_PTV, /* Transfert vector postload segment */
184 SEG_REGISTER, /* Mythical: a register-valued expression */
187 #define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
191 COMMON subsegT now_subseg;
192 /* What subseg we are accreting now? */
196 /* Segment our instructions emit to. */
197 /* Only OK values are SEG_TEXT or SEG_DATA. */
200 extern char *const seg_name[];
201 extern int section_alignment[];
206 typedef enum _relax_state {
207 rs_fill, /* Variable chars to be repeated fr_offset times. Fr_symbol
208 unused. Used with fr_offset == 0 for a constant length
211 rs_align, /* Align: Fr_offset: power of 2. 1 variable char: fill
214 rs_org, /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
217 rs_machine_dependent,
219 #ifndef WORKING_DOT_WORD
220 rs_broken_word, /* JF: gunpoint */
224 /* typedef unsigned char relax_substateT; */
225 /* JF this is more likely to leave the end of a struct frag on an align
226 boundry. Be very careful with this. */
227 typedef unsigned long relax_substateT;
229 typedef unsigned long relax_addressT;/* Enough bits for address. */
230 /* Still an integer type. */
236 * A code fragment (frag) is some known number of chars, followed by some
237 * unknown number of chars. Typically the unknown number of chars is an
238 * instruction address whose size is yet unknown. We always know the greatest
239 * possible size the unknown number of chars may become, and reserve that
240 * much room at the end of the frag.
241 * Once created, frags do not change address during assembly.
242 * We chain the frags in (a) forward-linked list(s). The object-file address
243 * of the 1st char of a frag is generally not known until after relax().
244 * Many things at assembly time describe an address by {object-file-address
245 * of a particular frag}+offset.
247 BUG: it may be smarter to have a single pointer off to various different
248 notes for different frag kinds. See how code pans
250 struct frag /* a code fragment */
252 unsigned long fr_address; /* Object file address. */
253 struct frag *fr_next; /* Chain forward; ascending address order. */
254 /* Rooted in frch_root. */
256 long fr_fix; /* (Fixed) number of chars we know we have. */
258 long fr_var; /* (Variable) number of chars after above. */
260 struct symbol *fr_symbol; /* For variable-length tail. */
261 long fr_offset; /* For variable-length tail. */
262 char *fr_opcode; /*->opcode low addr byte,for relax()ation*/
263 relax_stateT fr_type; /* What state is my tail in? */
264 relax_substateT fr_subtype;
265 /* These are needed only on the NS32K machines */
266 char fr_pcrel_adjust;
269 struct list_info_struct *line;
271 char fr_literal[1]; /* Chars begin here. */
272 /* One day we will compile fr_literal[0]. */
274 #define SIZEOF_STRUCT_FRAG \
275 ((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
276 /* We want to say fr_literal[0] above. */
278 typedef struct frag fragS;
280 COMMON fragS *frag_now; /* -> current frag we are building. */
281 /* This frag is incomplete. */
282 /* It is, however, included in frchain_now. */
283 /* Frag_now->fr_fix is bogus. Use: */
284 /* Virtual frag_now->fr_fix == obstack_next_free(&frags)-frag_now->fr_literal.*/
286 COMMON fragS zero_address_frag; /* For foreign-segment symbol fixups. */
287 COMMON fragS bss_address_frag; /* For local common (N_BSS segment) fixups. */
289 /* main program "as.c" (command arguments etc) */
292 flagseen[128]; /* ['x'] TRUE if "-x" seen. */
295 out_file_name; /* name of emitted object file */
297 COMMON int need_pass_2; /* TRUE if we need a second pass. */
299 COMMON int picmode; /* TRUE if "-k" or "-K" seen. */
302 char * poc_name; /* assembler mnemonic, lower case, no '.' */
303 void (*poc_handler)(); /* Do the work */
304 int poc_val; /* Value to pass to handler */
307 #if (__STDC__ == 1) & !defined(NO_STDARG)
309 int had_errors(void);
310 int had_warnings(void);
311 void as_bad(const char *Format, ...);
312 void as_fatal(const char *Format, ...);
313 void as_tsktsk(const char *Format, ...);
314 void as_warn(const char *Format, ...);
325 #endif /* __STDC__ & !NO_STDARG */
329 char *app_push(void);
330 char *atof_ieee(char *str, int what_kind, LITTLENUM_TYPE *words);
331 char *input_scrub_include_file(char *filename, char *position);
332 char *input_scrub_new_file(char *filename);
333 char *input_scrub_next_buffer(char **bufp);
334 char *strstr(const char *s, const char *wanted);
335 char *xmalloc(int size);
336 char *xrealloc(char *ptr, long n);
337 int do_scrub_next_char(int (*get)(), void (*unget)());
338 int gen_to_words(LITTLENUM_TYPE *words, int precision, long exponent_bits);
340 int had_errors(void);
341 int had_warnings(void);
342 int ignore_input(void);
343 int scrub_from_file(void);
344 int scrub_from_file(void);
345 int scrub_from_string(void);
346 int seen_at_least_1_file(void);
347 void app_pop(char *arg);
348 void as_howmuch(FILE *stream);
349 void as_perror(const char *gripe, const char *filename);
350 void as_where(char **, unsigned int *);
351 void bump_line_counters(void);
352 void do_scrub_begin(void);
353 void input_scrub_begin(void);
354 void input_scrub_close(void);
355 void input_scrub_end(void);
356 void int_to_gen(long x);
357 void new_logical_line(char *fname, int line_number);
358 void scrub_to_file(int ch);
359 void scrub_to_string(int ch);
360 void subseg_change(segT seg, int subseg);
361 void subseg_new(segT seg, subsegT subseg);
362 void subsegs_begin(void);
364 #else /* not __STDC__ */
368 char *input_scrub_include_file();
369 char *input_scrub_new_file();
370 char *input_scrub_next_buffer();
374 int do_scrub_next_char();
380 int scrub_from_file();
381 int scrub_from_file();
382 int scrub_from_string();
383 int seen_at_least_1_file();
388 void bump_line_counters();
389 void do_scrub_begin();
390 void input_scrub_begin();
391 void input_scrub_close();
392 void input_scrub_end();
394 void new_logical_line();
395 void scrub_to_file();
396 void scrub_to_string();
397 void subseg_change();
399 void subsegs_begin();
401 #endif /* not __STDC__ */
403 /* this one starts the chain of target dependant headers */
404 #include "targ-env.h"
406 /* these define types needed by the interfaces */
407 #include "struc-symbol.h"