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 $
25 /* #include <ansidecl.h> */
37 #define alloca __builtin_alloca
42 #define __LINE__ "unknown"
46 #define __FILE__ "unknown"
58 * I think this stuff is largely out of date. xoxorich.
60 * CAPITALISED names are #defined.
61 * "lowercaseH" is #defined if "lowercase.h" has been #include-d.
62 * "lowercaseT" is a typedef of "lowercase" objects.
63 * "lowercaseP" is type "pointer to object of type 'lowercase'".
64 * "lowercaseS" is typedef struct ... lowercaseS.
66 * #define DEBUG to enable all the "know" assertion tests.
67 * #define SUSPECT when debugging.
68 * #define COMMON as "extern" for all modules except one, where you #define
70 * If TEST is #defined, then we are testing a module: #define COMMON as "".
73 /* These #defines are for parameters of entire assembler. */
75 /* #define SUSPECT JF remove for speed testing */
76 /* These #includes are for type definitions etc. */
82 #define obstack_chunk_alloc xmalloc
83 #define obstack_chunk_free xfree
87 #define BAD_CASE(value) \
89 as_fatal("Case value %d unexpected at line %d of file \"%s\"\n", \
90 value, __LINE__, __FILE__); \
94 /* These are assembler-wide concepts */
99 #define COMMON /* declare our COMMONs storage here. */
101 #define COMMON extern /* our commons live elswhere */
104 /* COMMON now defined */
105 #define DEBUG /* temporary */
110 #define know(p) assert(p) /* Verify our assumptions! */
111 #endif /* not yet defined */
113 #define know(p) /* know() checks are no-op.ed */
119 * Supplies sanitised buffers to read.c.
120 * Also understands printing line-number part of error messages.
124 /* subsegs.c Sub-segments. Also, segment(=expression type)s.*/
127 * This table describes the use of segments as EXPRESSION types.
129 * X_seg X_add_symbol X_subtract_symbol X_add_number
130 * SEG_ABSENT no (legal) expression
131 * SEG_PASS1 no (defined) "
132 * SEG_BIG * > 32 bits const.
138 * SEG_DIFFERENCE 0 * 0
141 * The blank fields MUST be 0, and are nugatory.
142 * The '0' fields MAY be 0. The '*' fields MAY NOT be 0.
144 * SEG_BIG: X_add_number is < 0 if the result is in
145 * generic_floating_point_number. The value is -'c' where c is the
146 * character that introduced the constant. e.g. "0f6.9" will have -'f'
147 * as a X_add_number value.
148 * X_add_number > 0 is a count of how many littlenums it took to
149 * represent a bignum.
151 * If segments of both symbols are known, they are the same segment.
152 * X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE).
157 #define N_SEGMENTS 10
158 #define SEG_NORMAL(x) ((x) >= SEG_E0 && (x) <= SEG_E9)
159 #define SEG_LIST SEG_E0,SEG_E1,SEG_E2,SEG_E3,SEG_E4,SEG_E5,SEG_E6,SEG_E7,SEG_E8,SEG_E9
160 #define SEG_DATA SEG_E1
161 #define SEG_TEXT SEG_E0
162 #define SEG_BSS SEG_E2
165 #define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
166 #define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
173 SEG_ABSENT, /* Mythical Segment (absent): NO expression seen. */
174 SEG_PASS1, /* Mythical Segment: Need another pass. */
175 SEG_GOOF, /* Only happens if AS has a logic error. */
176 /* Invented so we don't crash printing */
177 /* error message involving weird segment. */
178 SEG_BIG, /* Bigger than 32 bits constant. */
179 SEG_DIFFERENCE, /* Mythical Segment: absolute difference. */
180 SEG_DEBUG, /* Debug segment */
181 SEG_NTV, /* Transfert vector preload segment */
182 SEG_PTV, /* Transfert vector postload segment */
183 SEG_REGISTER, /* Mythical: a register-valued expression */
186 #define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
190 COMMON subsegT now_subseg;
191 /* What subseg we are accreting now? */
195 /* Segment our instructions emit to. */
196 /* Only OK values are SEG_TEXT or SEG_DATA. */
199 extern char *const seg_name[];
200 extern int section_alignment[];
205 typedef enum _relax_state {
206 rs_fill, /* Variable chars to be repeated fr_offset times. Fr_symbol
207 unused. Used with fr_offset == 0 for a constant length
210 rs_align, /* Align: Fr_offset: power of 2. 1 variable char: fill
213 rs_org, /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
216 rs_machine_dependent,
218 #ifndef WORKING_DOT_WORD
219 rs_broken_word, /* JF: gunpoint */
223 /* typedef unsigned char relax_substateT; */
224 /* JF this is more likely to leave the end of a struct frag on an align
225 boundry. Be very careful with this. */
226 typedef unsigned long relax_substateT;
228 typedef unsigned long relax_addressT;/* Enough bits for address. */
229 /* Still an integer type. */
235 * A code fragment (frag) is some known number of chars, followed by some
236 * unknown number of chars. Typically the unknown number of chars is an
237 * instruction address whose size is yet unknown. We always know the greatest
238 * possible size the unknown number of chars may become, and reserve that
239 * much room at the end of the frag.
240 * Once created, frags do not change address during assembly.
241 * We chain the frags in (a) forward-linked list(s). The object-file address
242 * of the 1st char of a frag is generally not known until after relax().
243 * Many things at assembly time describe an address by {object-file-address
244 * of a particular frag}+offset.
246 BUG: it may be smarter to have a single pointer off to various different
247 notes for different frag kinds. See how code pans
249 struct frag /* a code fragment */
251 unsigned long fr_address; /* Object file address. */
252 struct frag *fr_next; /* Chain forward; ascending address order. */
253 /* Rooted in frch_root. */
255 long fr_fix; /* (Fixed) number of chars we know we have. */
257 long fr_var; /* (Variable) number of chars after above. */
259 struct symbol *fr_symbol; /* For variable-length tail. */
260 long fr_offset; /* For variable-length tail. */
261 char *fr_opcode; /*->opcode low addr byte,for relax()ation*/
262 relax_stateT fr_type; /* What state is my tail in? */
263 relax_substateT fr_subtype;
264 /* These are needed only on the NS32K machines */
265 char fr_pcrel_adjust;
268 struct list_info_struct *line;
270 char fr_literal[1]; /* Chars begin here. */
271 /* One day we will compile fr_literal[0]. */
273 #define SIZEOF_STRUCT_FRAG \
274 ((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
275 /* We want to say fr_literal[0] above. */
277 typedef struct frag fragS;
279 COMMON fragS *frag_now; /* -> current frag we are building. */
280 /* This frag is incomplete. */
281 /* It is, however, included in frchain_now. */
282 /* Frag_now->fr_fix is bogus. Use: */
283 /* Virtual frag_now->fr_fix == obstack_next_free(&frags)-frag_now->fr_literal.*/
285 COMMON fragS zero_address_frag; /* For foreign-segment symbol fixups. */
286 COMMON fragS bss_address_frag; /* For local common (N_BSS segment) fixups. */
288 /* main program "as.c" (command arguments etc) */
291 flagseen[128]; /* ['x'] TRUE if "-x" seen. */
294 out_file_name; /* name of emitted object file */
296 COMMON int need_pass_2; /* TRUE if we need a second pass. */
298 COMMON int picmode; /* TRUE if "-k" or "-K" seen. */
301 char * poc_name; /* assembler mnemonic, lower case, no '.' */
302 void (*poc_handler)(); /* Do the work */
303 int poc_val; /* Value to pass to handler */
306 #if (__STDC__ == 1) & !defined(NO_STDARG)
308 int had_errors(void);
309 int had_warnings(void);
310 void as_bad(const char *Format, ...);
311 void as_fatal(const char *Format, ...);
312 void as_tsktsk(const char *Format, ...);
313 void as_warn(const char *Format, ...);
324 #endif /* __STDC__ & !NO_STDARG */
328 char *app_push(void);
329 char *atof_ieee(char *str, int what_kind, LITTLENUM_TYPE *words);
330 char *input_scrub_include_file(char *filename, char *position);
331 char *input_scrub_new_file(char *filename);
332 char *input_scrub_next_buffer(char **bufp);
333 char *strstr(const char *s, const char *wanted);
334 char *xmalloc(int size);
335 char *xrealloc(char *ptr, long n);
336 int do_scrub_next_char(int (*get)(), void (*unget)());
337 int gen_to_words(LITTLENUM_TYPE *words, int precision, long exponent_bits);
339 int had_errors(void);
340 int had_warnings(void);
341 int ignore_input(void);
342 int scrub_from_file(void);
343 int scrub_from_file(void);
344 int scrub_from_string(void);
345 int seen_at_least_1_file(void);
346 void app_pop(char *arg);
347 void as_howmuch(FILE *stream);
348 void as_perror(const char *gripe, const char *filename);
349 void as_where(char **, unsigned int *);
350 void bump_line_counters(void);
351 void do_scrub_begin(void);
352 void input_scrub_begin(void);
353 void input_scrub_close(void);
354 void input_scrub_end(void);
355 void int_to_gen(long x);
356 void new_logical_line(char *fname, int line_number);
357 void scrub_to_file(int ch);
358 void scrub_to_string(int ch);
359 void subseg_change(segT seg, int subseg);
360 void subseg_new(segT seg, subsegT subseg);
361 void subsegs_begin(void);
363 #else /* not __STDC__ */
367 char *input_scrub_include_file();
368 char *input_scrub_new_file();
369 char *input_scrub_next_buffer();
373 int do_scrub_next_char();
379 int scrub_from_file();
380 int scrub_from_file();
381 int scrub_from_string();
382 int seen_at_least_1_file();
387 void bump_line_counters();
388 void do_scrub_begin();
389 void input_scrub_begin();
390 void input_scrub_close();
391 void input_scrub_end();
393 void new_logical_line();
394 void scrub_to_file();
395 void scrub_to_string();
396 void subseg_change();
398 void subsegs_begin();
400 #endif /* not __STDC__ */
402 /* this one starts the chain of target dependant headers */
403 #include "targ-env.h"
405 /* these define types needed by the interfaces */
406 #include "struc-symbol.h"