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. */
33 #define alloca __builtin_alloca
38 #define __LINE__ "unknown"
42 #define __FILE__ "unknown"
46 * I think this stuff is largely out of date. xoxorich.
48 * CAPITALISED names are #defined.
49 * "lowercaseH" is #defined if "lowercase.h" has been #include-d.
50 * "lowercaseT" is a typedef of "lowercase" objects.
51 * "lowercaseP" is type "pointer to object of type 'lowercase'".
52 * "lowercaseS" is typedef struct ... lowercaseS.
54 * #define DEBUG to enable all the "know" assertion tests.
55 * #define SUSPECT when debugging.
56 * #define COMMON as "extern" for all modules except one, where you #define
58 * If TEST is #defined, then we are testing a module: #define COMMON as "".
61 /* These #defines are for parameters of entire assembler. */
63 /* #define SUSPECT JF remove for speed testing */
64 /* These #includes are for type definitions etc. */
69 #define obstack_chunk_alloc xmalloc
70 #define obstack_chunk_free xfree
74 #define BAD_CASE(value) \
76 as_fatal("Case value %d unexpected at line %d of file \"%s\"\n", \
77 value, __LINE__, __FILE__); \
81 /* These are assembler-wide concepts */
86 #define COMMON /* declare our COMMONs storage here. */
88 #define COMMON extern /* our commons live elswhere */
91 /* COMMON now defined */
92 #define DEBUG /* temporary */
95 /* turn off all assertion checks */
103 #define know(p) assert(p) /* Verify our assumptions! */
104 #endif /* not yet defined */
106 #define know(p) /* know() checks are no-op.ed */
112 * Supplies sanitised buffers to read.c.
113 * Also understands printing line-number part of error messages.
117 /* subsegs.c Sub-segments. Also, segment(=expression type)s.*/
120 * This table describes the use of segments as EXPRESSION types.
122 * X_seg X_add_symbol X_subtract_symbol X_add_number
123 * SEG_ABSENT no (legal) expression
124 * SEG_PASS1 no (defined) "
125 * SEG_BIG * > 32 bits const.
131 * SEG_DIFFERENCE 0 * 0
134 * The blank fields MUST be 0, and are nugatory.
135 * The '0' fields MAY be 0. The '*' fields MAY NOT be 0.
137 * SEG_BIG: X_add_number is < 0 if the result is in
138 * generic_floating_point_number. The value is -'c' where c is the
139 * character that introduced the constant. e.g. "0f6.9" will have -'f'
140 * as a X_add_number value.
141 * X_add_number > 0 is a count of how many littlenums it took to
142 * represent a bignum.
144 * If segments of both symbols are known, they are the same segment.
145 * X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE).
151 #define N_SEGMENTS 10
152 #define SEG_NORMAL(x) ((x) >= SEG_E0 && (x) <= SEG_E9)
153 #define SEG_LIST SEG_E0,SEG_E1,SEG_E2,SEG_E3,SEG_E4,SEG_E5,SEG_E6,SEG_E7,SEG_E8,SEG_E9
154 #define SEG_DATA SEG_E1
155 #define SEG_TEXT SEG_E0
156 #define SEG_BSS SEG_E2
159 #define SEG_NORMAL(x) ((x) == SEG_TEXT || (x) == SEG_DATA || (x) == SEG_BSS)
160 #define SEG_LIST SEG_TEXT,SEG_DATA,SEG_BSS
167 SEG_ABSENT
, /* Mythical Segment (absent): NO expression seen. */
168 SEG_PASS1
, /* Mythical Segment: Need another pass. */
169 SEG_GOOF
, /* Only happens if AS has a logic error. */
170 /* Invented so we don't crash printing */
171 /* error message involving weird segment. */
172 SEG_BIG
, /* Bigger than 32 bits constant. */
173 SEG_DIFFERENCE
, /* Mythical Segment: absolute difference. */
174 SEG_DEBUG
, /* Debug segment */
175 SEG_NTV
, /* Transfert vector preload segment */
176 SEG_PTV
, /* Transfert vector postload segment */
177 SEG_REGISTER
, /* Mythical: a register-valued expression */
180 #define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
184 COMMON subsegT now_subseg
;
185 /* What subseg we are accreting now? */
189 /* Segment our instructions emit to. */
190 /* Only OK values are SEG_TEXT or SEG_DATA. */
193 extern char *const seg_name
[];
194 extern int section_alignment
[];
199 typedef enum _relax_state
{
200 rs_fill
= 1, /* Variable chars to be repeated fr_offset times.
201 Fr_symbol unused. Used with fr_offset == 0 for a
202 constant length frag. */
204 rs_align
, /* Align: Fr_offset: power of 2. 1 variable char: fill
207 rs_org
, /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
210 rs_machine_dependent
,
212 #ifndef WORKING_DOT_WORD
213 rs_broken_word
, /* JF: gunpoint */
217 /* typedef unsigned char relax_substateT; */
218 /* JF this is more likely to leave the end of a struct frag on an align
219 boundry. Be very careful with this. */
220 typedef unsigned long relax_substateT
;
222 typedef unsigned long relax_addressT
;/* Enough bits for address. */
223 /* Still an integer type. */
229 * A code fragment (frag) is some known number of chars, followed by some
230 * unknown number of chars. Typically the unknown number of chars is an
231 * instruction address whose size is yet unknown. We always know the greatest
232 * possible size the unknown number of chars may become, and reserve that
233 * much room at the end of the frag.
234 * Once created, frags do not change address during assembly.
235 * We chain the frags in (a) forward-linked list(s). The object-file address
236 * of the 1st char of a frag is generally not known until after relax().
237 * Many things at assembly time describe an address by {object-file-address
238 * of a particular frag}+offset.
240 BUG: it may be smarter to have a single pointer off to various different
241 notes for different frag kinds. See how code pans
243 struct frag
/* a code fragment */
245 unsigned long fr_address
; /* Object file address. */
246 struct frag
*fr_next
; /* Chain forward; ascending address order. */
247 /* Rooted in frch_root. */
249 long fr_fix
; /* (Fixed) number of chars we know we have. */
251 long fr_var
; /* (Variable) number of chars after above. */
253 struct symbol
*fr_symbol
; /* For variable-length tail. */
254 long fr_offset
; /* For variable-length tail. */
255 char *fr_opcode
; /*->opcode low addr byte,for relax()ation*/
256 relax_stateT fr_type
; /* What state is my tail in? */
257 relax_substateT fr_subtype
;
258 /* These are needed only on the NS32K machines */
259 char fr_pcrel_adjust
;
262 struct list_info_struct
*line
;
264 char fr_literal
[1]; /* Chars begin here. */
265 /* One day we will compile fr_literal[0]. */
267 #define SIZEOF_STRUCT_FRAG \
268 ((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
269 /* We want to say fr_literal[0] above. */
271 typedef struct frag fragS
;
273 COMMON fragS
*frag_now
; /* -> current frag we are building. */
274 /* This frag is incomplete. */
275 /* It is, however, included in frchain_now. */
276 /* Frag_now->fr_fix is bogus. Use: */
277 /* Virtual frag_now->fr_fix==obstack_next_free(&frags)-frag_now->fr_literal.*/
279 COMMON fragS zero_address_frag
; /* For foreign-segment symbol fixups. */
280 COMMON fragS bss_address_frag
; /* For local common (N_BSS segment) fixups. */
282 /* main program "as.c" (command arguments etc) */
284 COMMON
char flagseen
[128]; /* ['x'] TRUE if "-x" seen. */
286 COMMON
char * out_file_name
; /* name of emitted object file */
288 COMMON
int need_pass_2
; /* TRUE if we need a second pass. */
290 COMMON
int linkrelax
; /* TRUE if we should do no relaxing, and
291 leave lots of padding. */
294 char * poc_name
; /* assembler mnemonic, lower case, no '.' */
295 void (*poc_handler
)(); /* Do the work */
296 int poc_val
; /* Value to pass to handler */
299 #if (__STDC__ == 1) & !defined(NO_STDARG)
301 int had_errors(void);
302 int had_warnings(void);
303 void as_bad(const char *Format
, ...);
304 void as_fatal(const char *Format
, ...);
305 void as_tsktsk(const char *Format
, ...);
306 void as_warn(const char *Format
, ...);
317 #endif /* __STDC__ & !NO_STDARG */
321 char *app_push(void);
322 char *atof_ieee(char *str
, int what_kind
, LITTLENUM_TYPE
*words
);
323 char *input_scrub_include_file(char *filename
, char *position
);
324 char *input_scrub_new_file(char *filename
);
325 char *input_scrub_next_buffer(char **bufp
);
326 char *strstr(const char *s
, const char *wanted
);
327 char *xmalloc(int size
);
328 char *xrealloc(char *ptr
, long n
);
329 int do_scrub_next_char(int (*get
)(), void (*unget
)());
330 int gen_to_words(LITTLENUM_TYPE
*words
, int precision
, long exponent_bits
);
332 int had_errors(void);
333 int had_warnings(void);
334 int ignore_input(void);
335 int scrub_from_file(void);
336 int scrub_from_file(void);
337 int scrub_from_string(void);
338 int seen_at_least_1_file(void);
339 void app_pop(char *arg
);
340 void as_howmuch(FILE *stream
);
341 void as_perror(char *gripe
, char *filename
);
343 void bump_line_counters(void);
344 void do_scrub_begin(void);
345 void input_scrub_begin(void);
346 void input_scrub_close(void);
347 void input_scrub_end(void);
348 void int_to_gen(long x
);
349 void new_logical_line(char *fname
, int line_number
);
350 void scrub_to_file(int ch
);
351 void scrub_to_string(int ch
);
352 void subseg_change(segT seg
, int subseg
);
353 void subseg_new(segT seg
, subsegT subseg
);
354 void subsegs_begin(void);
356 #else /* not __STDC__ */
360 char *input_scrub_include_file();
361 char *input_scrub_new_file();
362 char *input_scrub_next_buffer();
366 int do_scrub_next_char();
372 int scrub_from_file();
373 int scrub_from_file();
374 int scrub_from_string();
375 int seen_at_least_1_file();
380 void bump_line_counters();
381 void do_scrub_begin();
382 void input_scrub_begin();
383 void input_scrub_close();
384 void input_scrub_end();
386 void new_logical_line();
387 void scrub_to_file();
388 void scrub_to_string();
389 void subseg_change();
391 void subsegs_begin();
393 #endif /* not __STDC__ */
395 /* this one starts the chain of target dependant headers */
396 #include "targ-env.h"
398 /* these define types needed by the interfaces */
399 #include "struc-symbol.h"
400 /*#include "aout/reloc.h"*/