2003-10-06 Dave Brolley <brolley@redhat.com>
[binutils.git] / gas / read.c
blob13f10732b5543552af1fa938a5628e45d60ffffc
1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
22 #if 0
23 /* If your chars aren't 8 bits, you will change this a bit.
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR (0xFF)
27 #else
28 #define MASK_CHAR ((int)(unsigned char) -1)
29 #endif
31 /* This is the largest known floating point format (for now). It will
32 grow when we do 4361 style flonums. */
33 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
35 /* Routines that read assembler source text to build spagetti in memory.
36 Another group of these functions is in the expr.c module. */
38 #include "as.h"
39 #include "safe-ctype.h"
40 #include "subsegs.h"
41 #include "sb.h"
42 #include "macro.h"
43 #include "obstack.h"
44 #include "listing.h"
45 #include "ecoff.h"
46 #include "dw2gencfi.h"
48 #ifndef TC_START_LABEL
49 #define TC_START_LABEL(x,y) (x == ':')
50 #endif
52 /* Set by the object-format or the target. */
53 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
54 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 do \
56 { \
57 if ((SIZE) >= 8) \
58 (P2VAR) = 3; \
59 else if ((SIZE) >= 4) \
60 (P2VAR) = 2; \
61 else if ((SIZE) >= 2) \
62 (P2VAR) = 1; \
63 else \
64 (P2VAR) = 0; \
65 } \
66 while (0)
67 #endif
69 char *input_line_pointer; /*->next char of source file to parse. */
71 #if BITS_PER_CHAR != 8
72 /* The following table is indexed by[(char)] and will break if
73 a char does not have exactly 256 states (hopefully 0:255!)! */
74 die horribly;
75 #endif
77 #ifndef LEX_AT
78 /* The m88k unfortunately uses @ as a label beginner. */
79 #define LEX_AT 0
80 #endif
82 #ifndef LEX_BR
83 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
84 #define LEX_BR 0
85 #endif
87 #ifndef LEX_PCT
88 /* The Delta 68k assembler permits % inside label names. */
89 #define LEX_PCT 0
90 #endif
92 #ifndef LEX_QM
93 /* The PowerPC Windows NT assemblers permits ? inside label names. */
94 #define LEX_QM 0
95 #endif
97 #ifndef LEX_HASH
98 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
99 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
100 #define LEX_HASH 0
101 #endif
103 #ifndef LEX_DOLLAR
104 /* The a29k assembler does not permits labels to start with $. */
105 #define LEX_DOLLAR 3
106 #endif
108 #ifndef LEX_TILDE
109 /* The Delta 68k assembler permits ~ at start of label names. */
110 #define LEX_TILDE 0
111 #endif
113 /* Used by is_... macros. our ctype[]. */
114 char lex_type[256] = {
115 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
116 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
117 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
118 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
119 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
121 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
126 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
127 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
128 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
129 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
130 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
133 /* In: a character.
134 Out: 1 if this character ends a line. */
135 char is_end_of_line[256] = {
136 #ifdef CR_EOL
137 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
138 #else
139 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
140 #endif
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
151 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
152 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
153 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
154 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
155 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
158 #ifdef IGNORE_OPCODE_CASE
159 char original_case_string[128];
160 #endif
162 /* Functions private to this file. */
164 static char *buffer; /* 1st char of each buffer of lines is here. */
165 static char *buffer_limit; /*->1 + last char in buffer. */
167 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
168 in the tc-<CPU>.h file. See the "Porting GAS" section of the
169 internals manual. */
170 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
172 /* Variables for handling include file directory table. */
174 /* Table of pointers to directories to search for .include's. */
175 char **include_dirs;
177 /* How many are in the table. */
178 int include_dir_count;
180 /* Length of longest in table. */
181 int include_dir_maxlen = 1;
183 #ifndef WORKING_DOT_WORD
184 struct broken_word *broken_words;
185 int new_broken_words;
186 #endif
188 /* The current offset into the absolute section. We don't try to
189 build frags in the absolute section, since no data can be stored
190 there. We just keep track of the current offset. */
191 addressT abs_section_offset;
193 /* If this line had an MRI style label, it is stored in this variable.
194 This is used by some of the MRI pseudo-ops. */
195 symbolS *line_label;
197 /* This global variable is used to support MRI common sections. We
198 translate such sections into a common symbol. This variable is
199 non-NULL when we are in an MRI common section. */
200 symbolS *mri_common_symbol;
202 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
203 need to align to an even byte boundary unless the next pseudo-op is
204 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
205 may be needed. */
206 static int mri_pending_align;
208 #ifndef NO_LISTING
209 #ifdef OBJ_ELF
210 /* This variable is set to be non-zero if the next string we see might
211 be the name of the source file in DWARF debugging information. See
212 the comment in emit_expr for the format we look for. */
213 static int dwarf_file_string;
214 #endif
215 #endif
217 static void cons_worker PARAMS ((int, int));
218 static int scrub_from_string PARAMS ((char *, int));
219 static void do_align PARAMS ((int, char *, int, int));
220 static void s_align PARAMS ((int, int));
221 static void s_lcomm_internal PARAMS ((int, int));
222 static int hex_float PARAMS ((int, char *));
223 static inline int sizeof_sleb128 PARAMS ((offsetT));
224 static inline int sizeof_uleb128 PARAMS ((valueT));
225 static inline int output_sleb128 PARAMS ((char *, offsetT));
226 static inline int output_uleb128 PARAMS ((char *, valueT));
227 static inline int output_big_sleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
228 static inline int output_big_uleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
229 static int output_big_leb128 PARAMS ((char *, LITTLENUM_TYPE *, int, int));
230 static void do_org PARAMS ((segT, expressionS *, int));
231 char *demand_copy_string PARAMS ((int *lenP));
232 static segT get_segmented_expression PARAMS ((expressionS *expP));
233 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
234 static void pobegin PARAMS ((void));
235 static int get_line_sb PARAMS ((sb *));
236 static void generate_file_debug PARAMS ((void));
238 void
239 read_begin ()
241 const char *p;
243 pobegin ();
244 obj_read_begin_hook ();
246 /* Something close -- but not too close -- to a multiple of 1024.
247 The debugging malloc I'm using has 24 bytes of overhead. */
248 obstack_begin (&notes, chunksize);
249 obstack_begin (&cond_obstack, chunksize);
251 /* Use machine dependent syntax. */
252 for (p = line_separator_chars; *p; p++)
253 is_end_of_line[(unsigned char) *p] = 1;
254 /* Use more. FIXME-SOMEDAY. */
256 if (flag_mri)
257 lex_type['?'] = 3;
260 /* Set up pseudo-op tables. */
262 static struct hash_control *po_hash;
264 static const pseudo_typeS potable[] = {
265 {"abort", s_abort, 0},
266 {"align", s_align_ptwo, 0},
267 {"ascii", stringer, 0},
268 {"asciz", stringer, 1},
269 {"balign", s_align_bytes, 0},
270 {"balignw", s_align_bytes, -2},
271 {"balignl", s_align_bytes, -4},
272 /* block */
273 {"byte", cons, 1},
274 {"comm", s_comm, 0},
275 {"common", s_mri_common, 0},
276 {"common.s", s_mri_common, 1},
277 {"data", s_data, 0},
278 {"dc", cons, 2},
279 {"dc.b", cons, 1},
280 {"dc.d", float_cons, 'd'},
281 {"dc.l", cons, 4},
282 {"dc.s", float_cons, 'f'},
283 {"dc.w", cons, 2},
284 {"dc.x", float_cons, 'x'},
285 {"dcb", s_space, 2},
286 {"dcb.b", s_space, 1},
287 {"dcb.d", s_float_space, 'd'},
288 {"dcb.l", s_space, 4},
289 {"dcb.s", s_float_space, 'f'},
290 {"dcb.w", s_space, 2},
291 {"dcb.x", s_float_space, 'x'},
292 {"ds", s_space, 2},
293 {"ds.b", s_space, 1},
294 {"ds.d", s_space, 8},
295 {"ds.l", s_space, 4},
296 {"ds.p", s_space, 12},
297 {"ds.s", s_space, 4},
298 {"ds.w", s_space, 2},
299 {"ds.x", s_space, 12},
300 {"debug", s_ignore, 0},
301 #ifdef S_SET_DESC
302 {"desc", s_desc, 0},
303 #endif
304 /* dim */
305 {"double", float_cons, 'd'},
306 /* dsect */
307 {"eject", listing_eject, 0}, /* Formfeed listing. */
308 {"else", s_else, 0},
309 {"elsec", s_else, 0},
310 {"elseif", s_elseif, (int) O_ne},
311 {"end", s_end, 0},
312 {"endc", s_endif, 0},
313 {"endfunc", s_func, 1},
314 {"endif", s_endif, 0},
315 {"endr", s_bad_endr, 0},
316 /* endef */
317 {"equ", s_set, 0},
318 {"equiv", s_set, 1},
319 {"err", s_err, 0},
320 {"exitm", s_mexit, 0},
321 /* extend */
322 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
323 {"appfile", s_app_file, 1},
324 {"appline", s_app_line, 0},
325 {"fail", s_fail, 0},
326 {"file", s_app_file, 0},
327 {"fill", s_fill, 0},
328 {"float", float_cons, 'f'},
329 {"format", s_ignore, 0},
330 {"func", s_func, 0},
331 {"global", s_globl, 0},
332 {"globl", s_globl, 0},
333 {"hword", cons, 2},
334 {"if", s_if, (int) O_ne},
335 {"ifc", s_ifc, 0},
336 {"ifdef", s_ifdef, 0},
337 {"ifeq", s_if, (int) O_eq},
338 {"ifeqs", s_ifeqs, 0},
339 {"ifge", s_if, (int) O_ge},
340 {"ifgt", s_if, (int) O_gt},
341 {"ifle", s_if, (int) O_le},
342 {"iflt", s_if, (int) O_lt},
343 {"ifnc", s_ifc, 1},
344 {"ifndef", s_ifdef, 1},
345 {"ifne", s_if, (int) O_ne},
346 {"ifnes", s_ifeqs, 1},
347 {"ifnotdef", s_ifdef, 1},
348 {"incbin", s_incbin, 0},
349 {"include", s_include, 0},
350 {"int", cons, 4},
351 {"irp", s_irp, 0},
352 {"irep", s_irp, 0},
353 {"irpc", s_irp, 1},
354 {"irepc", s_irp, 1},
355 {"lcomm", s_lcomm, 0},
356 {"lflags", listing_flags, 0}, /* Listing flags. */
357 {"linkonce", s_linkonce, 0},
358 {"list", listing_list, 1}, /* Turn listing on. */
359 {"llen", listing_psize, 1},
360 {"long", cons, 4},
361 {"lsym", s_lsym, 0},
362 {"macro", s_macro, 0},
363 {"mexit", s_mexit, 0},
364 {"mri", s_mri, 0},
365 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
366 {"name", s_ignore, 0},
367 {"noformat", s_ignore, 0},
368 {"nolist", listing_list, 0}, /* Turn listing off. */
369 {"nopage", listing_nopage, 0},
370 {"octa", cons, 16},
371 {"offset", s_struct, 0},
372 {"org", s_org, 0},
373 {"p2align", s_align_ptwo, 0},
374 {"p2alignw", s_align_ptwo, -2},
375 {"p2alignl", s_align_ptwo, -4},
376 {"page", listing_eject, 0},
377 {"plen", listing_psize, 0},
378 {"print", s_print, 0},
379 {"psize", listing_psize, 0}, /* Set paper size. */
380 {"purgem", s_purgem, 0},
381 {"quad", cons, 8},
382 {"rep", s_rept, 0},
383 {"rept", s_rept, 0},
384 {"rva", s_rva, 4},
385 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
386 /* scl */
387 /* sect */
388 {"set", s_set, 0},
389 {"short", cons, 2},
390 {"single", float_cons, 'f'},
391 /* size */
392 {"space", s_space, 0},
393 {"skip", s_space, 0},
394 {"sleb128", s_leb128, 1},
395 {"spc", s_ignore, 0},
396 {"stabd", s_stab, 'd'},
397 {"stabn", s_stab, 'n'},
398 {"stabs", s_stab, 's'},
399 {"string", stringer, 1},
400 {"struct", s_struct, 0},
401 /* tag */
402 {"text", s_text, 0},
404 /* This is for gcc to use. It's only just been added (2/94), so gcc
405 won't be able to use it for a while -- probably a year or more.
406 But once this has been released, check with gcc maintainers
407 before deleting it or even changing the spelling. */
408 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
409 /* If we're folding case -- done for some targets, not necessarily
410 all -- the above string in an input file will be converted to
411 this one. Match it either way... */
412 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
414 {"title", listing_title, 0}, /* Listing title. */
415 {"ttl", listing_title, 0},
416 /* type */
417 {"uleb128", s_leb128, 0},
418 /* use */
419 /* val */
420 {"xcom", s_comm, 0},
421 {"xdef", s_globl, 0},
422 {"xref", s_ignore, 0},
423 {"xstabs", s_xstab, 's'},
424 {"word", cons, 2},
425 {"zero", s_space, 0},
426 {NULL, NULL, 0} /* End sentinel. */
429 static int pop_override_ok = 0;
430 static const char *pop_table_name;
432 void
433 pop_insert (table)
434 const pseudo_typeS *table;
436 const char *errtxt;
437 const pseudo_typeS *pop;
438 for (pop = table; pop->poc_name; pop++)
440 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
441 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
442 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
443 errtxt);
447 #ifndef md_pop_insert
448 #define md_pop_insert() pop_insert(md_pseudo_table)
449 #endif
451 #ifndef obj_pop_insert
452 #define obj_pop_insert() pop_insert(obj_pseudo_table)
453 #endif
455 #ifndef cfi_pop_insert
456 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
457 #endif
459 static void
460 pobegin ()
462 po_hash = hash_new ();
464 /* Do the target-specific pseudo ops. */
465 pop_table_name = "md";
466 md_pop_insert ();
468 /* Now object specific. Skip any that were in the target table. */
469 pop_table_name = "obj";
470 pop_override_ok = 1;
471 obj_pop_insert ();
473 /* Now portable ones. Skip any that we've seen already. */
474 pop_table_name = "standard";
475 pop_insert (potable);
477 #ifdef TARGET_USE_CFIPOP
478 pop_table_name = "cfi";
479 pop_override_ok = 1;
480 cfi_pop_insert ();
481 #endif
484 #define HANDLE_CONDITIONAL_ASSEMBLY() \
485 if (ignore_input ()) \
487 while (!is_end_of_line[(unsigned char) *input_line_pointer++]) \
488 if (input_line_pointer == buffer_limit) \
489 break; \
490 continue; \
493 /* This function is used when scrubbing the characters between #APP
494 and #NO_APP. */
496 static char *scrub_string;
497 static char *scrub_string_end;
499 static int
500 scrub_from_string (buf, buflen)
501 char *buf;
502 int buflen;
504 int copy;
506 copy = scrub_string_end - scrub_string;
507 if (copy > buflen)
508 copy = buflen;
509 memcpy (buf, scrub_string, copy);
510 scrub_string += copy;
511 return copy;
514 /* We read the file, putting things into a web that represents what we
515 have been reading. */
516 void
517 read_a_source_file (name)
518 char *name;
520 register char c;
521 register char *s; /* String of symbol, '\0' appended. */
522 register int temp;
523 pseudo_typeS *pop;
525 #ifdef WARN_COMMENTS
526 found_comment = 0;
527 #endif
529 buffer = input_scrub_new_file (name);
531 listing_file (name);
532 listing_newline (NULL);
533 register_dependency (name);
535 /* Generate debugging information before we've read anything in to denote
536 this file as the "main" source file and not a subordinate one
537 (e.g. N_SO vs N_SOL in stabs). */
538 generate_file_debug ();
540 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
541 { /* We have another line to parse. */
542 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
544 while (input_line_pointer < buffer_limit)
546 /* We have more of this buffer to parse. */
548 /* We now have input_line_pointer->1st char of next line.
549 If input_line_pointer [-1] == '\n' then we just
550 scanned another line: so bump line counters. */
551 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
553 #ifdef md_start_line_hook
554 md_start_line_hook ();
555 #endif
556 if (input_line_pointer[-1] == '\n')
557 bump_line_counters ();
559 line_label = NULL;
561 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
563 /* Text at the start of a line must be a label, we
564 run down and stick a colon in. */
565 if (is_name_beginner (*input_line_pointer))
567 char *line_start = input_line_pointer;
568 char c;
569 int mri_line_macro;
571 LISTING_NEWLINE ();
572 HANDLE_CONDITIONAL_ASSEMBLY ();
574 c = get_symbol_end ();
576 /* In MRI mode, the EQU and MACRO pseudoops must
577 be handled specially. */
578 mri_line_macro = 0;
579 if (flag_m68k_mri)
581 char *rest = input_line_pointer + 1;
583 if (*rest == ':')
584 ++rest;
585 if (*rest == ' ' || *rest == '\t')
586 ++rest;
587 if ((strncasecmp (rest, "EQU", 3) == 0
588 || strncasecmp (rest, "SET", 3) == 0)
589 && (rest[3] == ' ' || rest[3] == '\t'))
591 input_line_pointer = rest + 3;
592 equals (line_start,
593 strncasecmp (rest, "SET", 3) == 0);
594 continue;
596 if (strncasecmp (rest, "MACRO", 5) == 0
597 && (rest[5] == ' '
598 || rest[5] == '\t'
599 || is_end_of_line[(unsigned char) rest[5]]))
600 mri_line_macro = 1;
603 /* In MRI mode, we need to handle the MACRO
604 pseudo-op specially: we don't want to put the
605 symbol in the symbol table. */
606 if (!mri_line_macro
607 #ifdef TC_START_LABEL_WITHOUT_COLON
608 && TC_START_LABEL_WITHOUT_COLON(c,
609 input_line_pointer)
610 #endif
612 line_label = colon (line_start);
613 else
614 line_label = symbol_create (line_start,
615 absolute_section,
616 (valueT) 0,
617 &zero_address_frag);
619 *input_line_pointer = c;
620 if (c == ':')
621 input_line_pointer++;
626 /* We are at the begining of a line, or similar place.
627 We expect a well-formed assembler statement.
628 A "symbol-name:" is a statement.
630 Depending on what compiler is used, the order of these tests
631 may vary to catch most common case 1st.
632 Each test is independent of all other tests at the (top) level.
633 PLEASE make a compiler that doesn't use this assembler.
634 It is crufty to waste a compiler's time encoding things for this
635 assembler, which then wastes more time decoding it.
636 (And communicating via (linear) files is silly!
637 If you must pass stuff, please pass a tree!) */
638 if ((c = *input_line_pointer++) == '\t'
639 || c == ' '
640 || c == '\f'
641 || c == 0)
642 c = *input_line_pointer++;
644 know (c != ' '); /* No further leading whitespace. */
646 #ifndef NO_LISTING
647 /* If listing is on, and we are expanding a macro, then give
648 the listing code the contents of the expanded line. */
649 if (listing)
651 if ((listing & LISTING_MACEXP) && macro_nest > 0)
653 char *copy;
654 int len;
656 /* Find the end of the current expanded macro line. */
657 for (s = input_line_pointer - 1; *s; ++s)
658 if (is_end_of_line[(unsigned char) *s])
659 break;
661 /* Copy it for safe keeping. Also give an indication of
662 how much macro nesting is involved at this point. */
663 len = s - (input_line_pointer - 1);
664 copy = (char *) xmalloc (len + macro_nest + 2);
665 memset (copy, '>', macro_nest);
666 copy[macro_nest] = ' ';
667 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
668 copy[macro_nest + 1 + len] = '\0';
670 /* Install the line with the listing facility. */
671 listing_newline (copy);
673 else
674 listing_newline (NULL);
676 #endif
677 /* C is the 1st significant character.
678 Input_line_pointer points after that character. */
679 if (is_name_beginner (c))
681 /* Want user-defined label or pseudo/opcode. */
682 HANDLE_CONDITIONAL_ASSEMBLY ();
684 s = --input_line_pointer;
685 c = get_symbol_end (); /* name's delimiter. */
687 /* C is character after symbol.
688 That character's place in the input line is now '\0'.
689 S points to the beginning of the symbol.
690 [In case of pseudo-op, s->'.'.]
691 Input_line_pointer->'\0' where c was. */
692 if (TC_START_LABEL (c, input_line_pointer))
694 if (flag_m68k_mri)
696 char *rest = input_line_pointer + 1;
698 /* In MRI mode, \tsym: set 0 is permitted. */
699 if (*rest == ':')
700 ++rest;
702 if (*rest == ' ' || *rest == '\t')
703 ++rest;
705 if ((strncasecmp (rest, "EQU", 3) == 0
706 || strncasecmp (rest, "SET", 3) == 0)
707 && (rest[3] == ' ' || rest[3] == '\t'))
709 input_line_pointer = rest + 3;
710 equals (s, 1);
711 continue;
715 line_label = colon (s); /* User-defined label. */
716 /* Put ':' back for error messages' sake. */
717 *input_line_pointer++ = ':';
718 #ifdef tc_check_label
719 tc_check_label (line_label);
720 #endif
721 /* Input_line_pointer->after ':'. */
722 SKIP_WHITESPACE ();
724 else if (c == '='
725 || ((c == ' ' || c == '\t')
726 && input_line_pointer[1] == '='
727 #ifdef TC_EQUAL_IN_INSN
728 && !TC_EQUAL_IN_INSN (c, input_line_pointer)
729 #endif
732 equals (s, 1);
733 demand_empty_rest_of_line ();
735 else
737 /* Expect pseudo-op or machine instruction. */
738 pop = NULL;
740 #ifdef IGNORE_OPCODE_CASE
742 char *s2 = s;
744 strncpy (original_case_string, s2, sizeof (original_case_string));
745 original_case_string[sizeof (original_case_string) - 1] = 0;
747 while (*s2)
749 *s2 = TOLOWER (*s2);
750 s2++;
753 #endif
754 if (NO_PSEUDO_DOT || flag_m68k_mri)
756 /* The MRI assembler and the m88k use pseudo-ops
757 without a period. */
758 pop = (pseudo_typeS *) hash_find (po_hash, s);
759 if (pop != NULL && pop->poc_handler == NULL)
760 pop = NULL;
763 if (pop != NULL
764 || (!flag_m68k_mri && *s == '.'))
766 /* PSEUDO - OP.
768 WARNING: c has next char, which may be end-of-line.
769 We lookup the pseudo-op table with s+1 because we
770 already know that the pseudo-op begins with a '.'. */
772 if (pop == NULL)
773 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
775 /* In MRI mode, we may need to insert an
776 automatic alignment directive. What a hack
777 this is. */
778 if (mri_pending_align
779 && (pop == NULL
780 || !((pop->poc_handler == cons
781 && pop->poc_val == 1)
782 || (pop->poc_handler == s_space
783 && pop->poc_val == 1)
784 #ifdef tc_conditional_pseudoop
785 || tc_conditional_pseudoop (pop)
786 #endif
787 || pop->poc_handler == s_if
788 || pop->poc_handler == s_ifdef
789 || pop->poc_handler == s_ifc
790 || pop->poc_handler == s_ifeqs
791 || pop->poc_handler == s_else
792 || pop->poc_handler == s_endif
793 || pop->poc_handler == s_globl
794 || pop->poc_handler == s_ignore)))
796 do_align (1, (char *) NULL, 0, 0);
797 mri_pending_align = 0;
799 if (line_label != NULL)
801 symbol_set_frag (line_label, frag_now);
802 S_SET_VALUE (line_label, frag_now_fix ());
806 /* Print the error msg now, while we still can. */
807 if (pop == NULL)
809 as_bad (_("unknown pseudo-op: `%s'"), s);
810 *input_line_pointer = c;
811 s_ignore (0);
812 continue;
815 /* Put it back for error messages etc. */
816 *input_line_pointer = c;
817 /* The following skip of whitespace is compulsory.
818 A well shaped space is sometimes all that separates
819 keyword from operands. */
820 if (c == ' ' || c == '\t')
821 input_line_pointer++;
823 /* Input_line is restored.
824 Input_line_pointer->1st non-blank char
825 after pseudo-operation. */
826 (*pop->poc_handler) (pop->poc_val);
828 /* If that was .end, just get out now. */
829 if (pop->poc_handler == s_end)
830 goto quit;
832 else
834 int inquote = 0;
835 #ifdef QUOTES_IN_INSN
836 int inescape = 0;
837 #endif
839 /* WARNING: c has char, which may be end-of-line. */
840 /* Also: input_line_pointer->`\0` where c was. */
841 *input_line_pointer = c;
842 while (!is_end_of_line[(unsigned char) *input_line_pointer]
843 || inquote
844 #ifdef TC_EOL_IN_INSN
845 || TC_EOL_IN_INSN (input_line_pointer)
846 #endif
849 if (flag_m68k_mri && *input_line_pointer == '\'')
850 inquote = !inquote;
851 #ifdef QUOTES_IN_INSN
852 if (inescape)
853 inescape = 0;
854 else if (*input_line_pointer == '"')
855 inquote = !inquote;
856 else if (*input_line_pointer == '\\')
857 inescape = 1;
858 #endif
859 input_line_pointer++;
862 c = *input_line_pointer;
863 *input_line_pointer = '\0';
865 generate_lineno_debug ();
867 if (macro_defined)
869 sb out;
870 const char *err;
871 macro_entry *macro;
873 if (check_macro (s, &out, &err, &macro))
875 if (err != NULL)
876 as_bad ("%s", err);
877 *input_line_pointer++ = c;
878 input_scrub_include_sb (&out,
879 input_line_pointer, 1);
880 sb_kill (&out);
881 buffer_limit =
882 input_scrub_next_buffer (&input_line_pointer);
883 #ifdef md_macro_info
884 md_macro_info (macro);
885 #endif
886 continue;
890 if (mri_pending_align)
892 do_align (1, (char *) NULL, 0, 0);
893 mri_pending_align = 0;
894 if (line_label != NULL)
896 symbol_set_frag (line_label, frag_now);
897 S_SET_VALUE (line_label, frag_now_fix ());
901 md_assemble (s); /* Assemble 1 instruction. */
903 *input_line_pointer++ = c;
905 /* We resume loop AFTER the end-of-line from
906 this instruction. */
909 continue;
912 /* Empty statement? */
913 if (is_end_of_line[(unsigned char) c])
914 continue;
916 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
918 /* local label ("4:") */
919 char *backup = input_line_pointer;
921 HANDLE_CONDITIONAL_ASSEMBLY ();
923 temp = c - '0';
925 /* Read the whole number. */
926 while (ISDIGIT (*input_line_pointer))
928 temp = (temp * 10) + *input_line_pointer - '0';
929 ++input_line_pointer;
932 if (LOCAL_LABELS_DOLLAR
933 && *input_line_pointer == '$'
934 && *(input_line_pointer + 1) == ':')
936 input_line_pointer += 2;
938 if (dollar_label_defined (temp))
940 as_fatal (_("label \"%d$\" redefined"), temp);
943 define_dollar_label (temp);
944 colon (dollar_label_name (temp, 0));
945 continue;
948 if (LOCAL_LABELS_FB
949 && *input_line_pointer++ == ':')
951 fb_label_instance_inc (temp);
952 colon (fb_label_name (temp, 0));
953 continue;
956 input_line_pointer = backup;
957 } /* local label ("4:") */
959 if (c && strchr (line_comment_chars, c))
960 { /* Its a comment. Better say APP or NO_APP. */
961 sb sbuf;
962 char *ends;
963 char *new_buf;
964 char *new_tmp;
965 unsigned int new_length;
966 char *tmp_buf = 0;
968 bump_line_counters ();
969 s = input_line_pointer;
970 if (strncmp (s, "APP\n", 4))
971 continue; /* We ignore it */
972 s += 4;
974 sb_new (&sbuf);
975 ends = strstr (s, "#NO_APP\n");
977 if (!ends)
979 unsigned int tmp_len;
980 unsigned int num;
982 /* The end of the #APP wasn't in this buffer. We
983 keep reading in buffers until we find the #NO_APP
984 that goes with this #APP There is one. The specs
985 guarentee it... */
986 tmp_len = buffer_limit - s;
987 tmp_buf = xmalloc (tmp_len + 1);
988 memcpy (tmp_buf, s, tmp_len);
991 new_tmp = input_scrub_next_buffer (&buffer);
992 if (!new_tmp)
993 break;
994 else
995 buffer_limit = new_tmp;
996 input_line_pointer = buffer;
997 ends = strstr (buffer, "#NO_APP\n");
998 if (ends)
999 num = ends - buffer;
1000 else
1001 num = buffer_limit - buffer;
1003 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1004 memcpy (tmp_buf + tmp_len, buffer, num);
1005 tmp_len += num;
1007 while (!ends);
1009 input_line_pointer = ends ? ends + 8 : NULL;
1011 s = tmp_buf;
1012 ends = s + tmp_len;
1015 else
1017 input_line_pointer = ends + 8;
1020 scrub_string = s;
1021 scrub_string_end = ends;
1023 new_length = ends - s;
1024 new_buf = (char *) xmalloc (new_length);
1025 new_tmp = new_buf;
1026 for (;;)
1028 int space;
1029 int size;
1031 space = (new_buf + new_length) - new_tmp;
1032 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1034 if (size < space)
1036 new_tmp[size] = 0;
1037 break;
1040 new_buf = xrealloc (new_buf, new_length + 100);
1041 new_tmp = new_buf + new_length;
1042 new_length += 100;
1045 if (tmp_buf)
1046 free (tmp_buf);
1048 /* We've "scrubbed" input to the preferred format. In the
1049 process we may have consumed the whole of the remaining
1050 file (and included files). We handle this formatted
1051 input similar to that of macro expansion, letting
1052 actual macro expansion (possibly nested) and other
1053 input expansion work. Beware that in messages, line
1054 numbers and possibly file names will be incorrect. */
1055 sb_add_string (&sbuf, new_buf);
1056 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1057 sb_kill (&sbuf);
1058 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1059 free (new_buf);
1060 continue;
1063 HANDLE_CONDITIONAL_ASSEMBLY ();
1065 #ifdef tc_unrecognized_line
1066 if (tc_unrecognized_line (c))
1067 continue;
1068 #endif
1069 input_line_pointer--;
1070 /* Report unknown char as ignored. */
1071 ignore_rest_of_line ();
1074 #ifdef md_after_pass_hook
1075 md_after_pass_hook ();
1076 #endif
1079 quit:
1081 #ifdef md_cleanup
1082 md_cleanup ();
1083 #endif
1084 /* Close the input file. */
1085 input_scrub_close ();
1086 #ifdef WARN_COMMENTS
1088 if (warn_comment && found_comment)
1089 as_warn_where (found_comment_file, found_comment,
1090 "first comment found here");
1092 #endif
1095 /* For most MRI pseudo-ops, the line actually ends at the first
1096 nonquoted space. This function looks for that point, stuffs a null
1097 in, and sets *STOPCP to the character that used to be there, and
1098 returns the location.
1100 Until I hear otherwise, I am going to assume that this is only true
1101 for the m68k MRI assembler. */
1103 char *
1104 mri_comment_field (stopcp)
1105 char *stopcp;
1107 char *s;
1108 #ifdef TC_M68K
1109 int inquote = 0;
1111 know (flag_m68k_mri);
1113 for (s = input_line_pointer;
1114 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1115 || inquote);
1116 s++)
1118 if (*s == '\'')
1119 inquote = !inquote;
1121 #else
1122 for (s = input_line_pointer;
1123 !is_end_of_line[(unsigned char) *s];
1124 s++)
1126 #endif
1127 *stopcp = *s;
1128 *s = '\0';
1130 return s;
1133 /* Skip to the end of an MRI comment field. */
1135 void
1136 mri_comment_end (stop, stopc)
1137 char *stop;
1138 int stopc;
1140 know (flag_mri);
1142 input_line_pointer = stop;
1143 *stop = stopc;
1144 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1145 ++input_line_pointer;
1148 void
1149 s_abort (ignore)
1150 int ignore ATTRIBUTE_UNUSED;
1152 as_fatal (_(".abort detected. Abandoning ship."));
1155 /* Guts of .align directive. N is the power of two to which to align.
1156 FILL may be NULL, or it may point to the bytes of the fill pattern.
1157 LEN is the length of whatever FILL points to, if anything. MAX is
1158 the maximum number of characters to skip when doing the alignment,
1159 or 0 if there is no maximum. */
1161 static void
1162 do_align (n, fill, len, max)
1163 int n;
1164 char *fill;
1165 int len;
1166 int max;
1168 if (now_seg == absolute_section)
1170 if (fill != NULL)
1171 while (len-- > 0)
1172 if (*fill++ != '\0')
1174 as_warn (_("ignoring fill value in absolute section"));
1175 break;
1177 fill = NULL;
1178 len = 0;
1181 #ifdef md_do_align
1182 md_do_align (n, fill, len, max, just_record_alignment);
1183 #endif
1185 /* Only make a frag if we HAVE to... */
1186 if (n != 0 && !need_pass_2)
1188 if (fill == NULL)
1190 if (subseg_text_p (now_seg))
1191 frag_align_code (n, max);
1192 else
1193 frag_align (n, 0, max);
1195 else if (len <= 1)
1196 frag_align (n, *fill, max);
1197 else
1198 frag_align_pattern (n, fill, len, max);
1201 #ifdef md_do_align
1202 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1203 #endif
1205 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1208 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1209 (in bytes). A negative ARG is the negative of the length of the
1210 fill pattern. BYTES_P is non-zero if the alignment value should be
1211 interpreted as the byte boundary, rather than the power of 2. */
1213 static void
1214 s_align (arg, bytes_p)
1215 int arg;
1216 int bytes_p;
1218 register unsigned int align;
1219 char *stop = NULL;
1220 char stopc;
1221 offsetT fill = 0;
1222 int max;
1223 int fill_p;
1225 if (flag_mri)
1226 stop = mri_comment_field (&stopc);
1228 if (is_end_of_line[(unsigned char) *input_line_pointer])
1230 if (arg < 0)
1231 align = 0;
1232 else
1233 align = arg; /* Default value from pseudo-op table. */
1235 else
1237 align = get_absolute_expression ();
1238 SKIP_WHITESPACE ();
1241 if (bytes_p)
1243 /* Convert to a power of 2. */
1244 if (align != 0)
1246 unsigned int i;
1248 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1250 if (align != 1)
1251 as_bad (_("alignment not a power of 2"));
1253 align = i;
1257 if (align > 15)
1259 align = 15;
1260 as_warn (_("alignment too large: %u assumed"), align);
1263 if (*input_line_pointer != ',')
1265 fill_p = 0;
1266 max = 0;
1268 else
1270 ++input_line_pointer;
1271 if (*input_line_pointer == ',')
1272 fill_p = 0;
1273 else
1275 fill = get_absolute_expression ();
1276 SKIP_WHITESPACE ();
1277 fill_p = 1;
1280 if (*input_line_pointer != ',')
1281 max = 0;
1282 else
1284 ++input_line_pointer;
1285 max = get_absolute_expression ();
1289 if (!fill_p)
1291 if (arg < 0)
1292 as_warn (_("expected fill pattern missing"));
1293 do_align (align, (char *) NULL, 0, max);
1295 else
1297 int fill_len;
1299 if (arg >= 0)
1300 fill_len = 1;
1301 else
1302 fill_len = -arg;
1303 if (fill_len <= 1)
1305 char fill_char;
1307 fill_char = fill;
1308 do_align (align, &fill_char, fill_len, max);
1310 else
1312 char ab[16];
1314 if ((size_t) fill_len > sizeof ab)
1315 abort ();
1316 md_number_to_chars (ab, fill, fill_len);
1317 do_align (align, ab, fill_len, max);
1321 demand_empty_rest_of_line ();
1323 if (flag_mri)
1324 mri_comment_end (stop, stopc);
1327 /* Handle the .align pseudo-op on machines where ".align 4" means
1328 align to a 4 byte boundary. */
1330 void
1331 s_align_bytes (arg)
1332 int arg;
1334 s_align (arg, 1);
1337 /* Handle the .align pseudo-op on machines where ".align 4" means align
1338 to a 2**4 boundary. */
1340 void
1341 s_align_ptwo (arg)
1342 int arg;
1344 s_align (arg, 0);
1347 void
1348 s_comm (ignore)
1349 int ignore ATTRIBUTE_UNUSED;
1351 register char *name;
1352 register char c;
1353 register char *p;
1354 offsetT temp;
1355 register symbolS *symbolP;
1356 char *stop = NULL;
1357 char stopc;
1359 if (flag_mri)
1360 stop = mri_comment_field (&stopc);
1362 name = input_line_pointer;
1363 c = get_symbol_end ();
1364 /* Just after name is now '\0'. */
1365 p = input_line_pointer;
1366 *p = c;
1368 if (name == p)
1370 as_bad (_("expected symbol name"));
1371 discard_rest_of_line ();
1372 return;
1375 SKIP_WHITESPACE ();
1377 if (*input_line_pointer != ',')
1379 *p = 0;
1380 as_bad (_("expected comma after \"%s\""), name);
1381 *p = c;
1382 ignore_rest_of_line ();
1383 if (flag_mri)
1384 mri_comment_end (stop, stopc);
1385 return;
1388 input_line_pointer++; /* skip ',' */
1390 if ((temp = get_absolute_expression ()) < 0)
1392 as_warn (_(".COMMon length (%lu) out of range ignored"),
1393 (unsigned long) temp);
1394 ignore_rest_of_line ();
1395 if (flag_mri)
1396 mri_comment_end (stop, stopc);
1397 return;
1400 *p = 0;
1401 symbolP = symbol_find_or_make (name);
1402 *p = c;
1404 if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
1406 as_bad (_("symbol `%s' is already defined"),
1407 S_GET_NAME (symbolP));
1408 ignore_rest_of_line ();
1409 if (flag_mri)
1410 mri_comment_end (stop, stopc);
1411 return;
1414 if (S_GET_VALUE (symbolP))
1416 if (S_GET_VALUE (symbolP) != (valueT) temp)
1417 as_bad (_("length of .comm \"%s\" is already %ld; not changing to %ld"),
1418 S_GET_NAME (symbolP),
1419 (long) S_GET_VALUE (symbolP),
1420 (long) temp);
1422 else
1424 S_SET_VALUE (symbolP, (valueT) temp);
1425 S_SET_EXTERNAL (symbolP);
1427 #ifdef OBJ_VMS
1429 extern int flag_one;
1430 if (!temp || !flag_one)
1431 S_GET_OTHER(symbolP) = const_flag;
1433 #endif /* not OBJ_VMS */
1434 know (symbolP->sy_frag == &zero_address_frag);
1436 demand_empty_rest_of_line ();
1438 if (flag_mri)
1439 mri_comment_end (stop, stopc);
1440 } /* s_comm() */
1442 /* The MRI COMMON pseudo-op. We handle this by creating a common
1443 symbol with the appropriate name. We make s_space do the right
1444 thing by increasing the size. */
1446 void
1447 s_mri_common (small)
1448 int small ATTRIBUTE_UNUSED;
1450 char *name;
1451 char c;
1452 char *alc = NULL;
1453 symbolS *sym;
1454 offsetT align;
1455 char *stop = NULL;
1456 char stopc;
1458 if (!flag_mri)
1460 s_comm (0);
1461 return;
1464 stop = mri_comment_field (&stopc);
1466 SKIP_WHITESPACE ();
1468 name = input_line_pointer;
1469 if (!ISDIGIT (*name))
1470 c = get_symbol_end ();
1471 else
1475 ++input_line_pointer;
1477 while (ISDIGIT (*input_line_pointer));
1479 c = *input_line_pointer;
1480 *input_line_pointer = '\0';
1482 if (line_label != NULL)
1484 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1485 + (input_line_pointer - name)
1486 + 1);
1487 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1488 name = alc;
1492 sym = symbol_find_or_make (name);
1493 *input_line_pointer = c;
1494 if (alc != NULL)
1495 free (alc);
1497 if (*input_line_pointer != ',')
1498 align = 0;
1499 else
1501 ++input_line_pointer;
1502 align = get_absolute_expression ();
1505 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1507 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1508 ignore_rest_of_line ();
1509 mri_comment_end (stop, stopc);
1510 return;
1513 S_SET_EXTERNAL (sym);
1514 mri_common_symbol = sym;
1516 #ifdef S_SET_ALIGN
1517 if (align != 0)
1518 S_SET_ALIGN (sym, align);
1519 #endif
1521 if (line_label != NULL)
1523 expressionS exp;
1524 exp.X_op = O_symbol;
1525 exp.X_add_symbol = sym;
1526 exp.X_add_number = 0;
1527 symbol_set_value_expression (line_label, &exp);
1528 symbol_set_frag (line_label, &zero_address_frag);
1529 S_SET_SEGMENT (line_label, expr_section);
1532 /* FIXME: We just ignore the small argument, which distinguishes
1533 COMMON and COMMON.S. I don't know what we can do about it. */
1535 /* Ignore the type and hptype. */
1536 if (*input_line_pointer == ',')
1537 input_line_pointer += 2;
1538 if (*input_line_pointer == ',')
1539 input_line_pointer += 2;
1541 demand_empty_rest_of_line ();
1543 mri_comment_end (stop, stopc);
1546 void
1547 s_data (ignore)
1548 int ignore ATTRIBUTE_UNUSED;
1550 segT section;
1551 register int temp;
1553 temp = get_absolute_expression ();
1554 if (flag_readonly_data_in_text)
1556 section = text_section;
1557 temp += 1000;
1559 else
1560 section = data_section;
1562 subseg_set (section, (subsegT) temp);
1564 #ifdef OBJ_VMS
1565 const_flag = 0;
1566 #endif
1567 demand_empty_rest_of_line ();
1570 /* Handle the .appfile pseudo-op. This is automatically generated by
1571 do_scrub_chars when a preprocessor # line comment is seen with a
1572 file name. This default definition may be overridden by the object
1573 or CPU specific pseudo-ops. This function is also the default
1574 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1575 .file. */
1577 void
1578 s_app_file_string (file)
1579 char *file;
1581 #ifdef LISTING
1582 if (listing)
1583 listing_source_file (file);
1584 #endif
1585 register_dependency (file);
1586 #ifdef obj_app_file
1587 obj_app_file (file);
1588 #endif
1591 void
1592 s_app_file (appfile)
1593 int appfile;
1595 register char *s;
1596 int length;
1598 /* Some assemblers tolerate immediately following '"'. */
1599 if ((s = demand_copy_string (&length)) != 0)
1601 /* If this is a fake .appfile, a fake newline was inserted into
1602 the buffer. Passing -2 to new_logical_line tells it to
1603 account for it. */
1604 int may_omit
1605 = (!new_logical_line (s, appfile ? -2 : -1) && appfile);
1607 /* In MRI mode, the preprocessor may have inserted an extraneous
1608 backquote. */
1609 if (flag_m68k_mri
1610 && *input_line_pointer == '\''
1611 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1612 ++input_line_pointer;
1614 demand_empty_rest_of_line ();
1615 if (!may_omit)
1616 s_app_file_string (s);
1620 /* Handle the .appline pseudo-op. This is automatically generated by
1621 do_scrub_chars when a preprocessor # line comment is seen. This
1622 default definition may be overridden by the object or CPU specific
1623 pseudo-ops. */
1625 void
1626 s_app_line (ignore)
1627 int ignore ATTRIBUTE_UNUSED;
1629 int l;
1631 /* The given number is that of the next line. */
1632 l = get_absolute_expression () - 1;
1633 if (l < 0)
1634 /* Some of the back ends can't deal with non-positive line numbers.
1635 Besides, it's silly. */
1636 as_warn (_("line numbers must be positive; line number %d rejected"),
1637 l + 1);
1638 else
1640 new_logical_line ((char *) NULL, l);
1641 #ifdef LISTING
1642 if (listing)
1643 listing_source_line (l);
1644 #endif
1646 demand_empty_rest_of_line ();
1649 /* Handle the .end pseudo-op. Actually, the real work is done in
1650 read_a_source_file. */
1652 void
1653 s_end (ignore)
1654 int ignore ATTRIBUTE_UNUSED;
1656 if (flag_mri)
1658 /* The MRI assembler permits the start symbol to follow .end,
1659 but we don't support that. */
1660 SKIP_WHITESPACE ();
1661 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1662 && *input_line_pointer != '*'
1663 && *input_line_pointer != '!')
1664 as_warn (_("start address not supported"));
1668 /* Handle the .err pseudo-op. */
1670 void
1671 s_err (ignore)
1672 int ignore ATTRIBUTE_UNUSED;
1674 as_bad (_(".err encountered"));
1675 demand_empty_rest_of_line ();
1678 /* Handle the MRI fail pseudo-op. */
1680 void
1681 s_fail (ignore)
1682 int ignore ATTRIBUTE_UNUSED;
1684 offsetT temp;
1685 char *stop = NULL;
1686 char stopc;
1688 if (flag_mri)
1689 stop = mri_comment_field (&stopc);
1691 temp = get_absolute_expression ();
1692 if (temp >= 500)
1693 as_warn (_(".fail %ld encountered"), (long) temp);
1694 else
1695 as_bad (_(".fail %ld encountered"), (long) temp);
1697 demand_empty_rest_of_line ();
1699 if (flag_mri)
1700 mri_comment_end (stop, stopc);
1703 void
1704 s_fill (ignore)
1705 int ignore ATTRIBUTE_UNUSED;
1707 expressionS rep_exp;
1708 long size = 1;
1709 register long fill = 0;
1710 char *p;
1712 #ifdef md_flush_pending_output
1713 md_flush_pending_output ();
1714 #endif
1716 get_known_segmented_expression (&rep_exp);
1717 if (*input_line_pointer == ',')
1719 input_line_pointer++;
1720 size = get_absolute_expression ();
1721 if (*input_line_pointer == ',')
1723 input_line_pointer++;
1724 fill = get_absolute_expression ();
1728 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1729 #define BSD_FILL_SIZE_CROCK_8 (8)
1730 if (size > BSD_FILL_SIZE_CROCK_8)
1732 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1733 size = BSD_FILL_SIZE_CROCK_8;
1735 if (size < 0)
1737 as_warn (_("size negative; .fill ignored"));
1738 size = 0;
1740 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1742 if (rep_exp.X_add_number < 0)
1743 as_warn (_("repeat < 0; .fill ignored"));
1744 size = 0;
1747 if (size && !need_pass_2)
1749 if (rep_exp.X_op == O_constant)
1751 p = frag_var (rs_fill, (int) size, (int) size,
1752 (relax_substateT) 0, (symbolS *) 0,
1753 (offsetT) rep_exp.X_add_number,
1754 (char *) 0);
1756 else
1758 /* We don't have a constant repeat count, so we can't use
1759 rs_fill. We can get the same results out of rs_space,
1760 but its argument is in bytes, so we must multiply the
1761 repeat count by size. */
1763 symbolS *rep_sym;
1764 rep_sym = make_expr_symbol (&rep_exp);
1765 if (size != 1)
1767 expressionS size_exp;
1768 size_exp.X_op = O_constant;
1769 size_exp.X_add_number = size;
1771 rep_exp.X_op = O_multiply;
1772 rep_exp.X_add_symbol = rep_sym;
1773 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1774 rep_exp.X_add_number = 0;
1775 rep_sym = make_expr_symbol (&rep_exp);
1778 p = frag_var (rs_space, (int) size, (int) size,
1779 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1782 memset (p, 0, (unsigned int) size);
1784 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1785 flavoured AS. The following bizarre behaviour is to be
1786 compatible with above. I guess they tried to take up to 8
1787 bytes from a 4-byte expression and they forgot to sign
1788 extend. */
1789 #define BSD_FILL_SIZE_CROCK_4 (4)
1790 md_number_to_chars (p, (valueT) fill,
1791 (size > BSD_FILL_SIZE_CROCK_4
1792 ? BSD_FILL_SIZE_CROCK_4
1793 : (int) size));
1794 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1795 but emits no error message because it seems a legal thing to do.
1796 It is a degenerate case of .fill but could be emitted by a
1797 compiler. */
1799 demand_empty_rest_of_line ();
1802 void
1803 s_globl (ignore)
1804 int ignore ATTRIBUTE_UNUSED;
1806 char *name;
1807 int c;
1808 symbolS *symbolP;
1809 char *stop = NULL;
1810 char stopc;
1812 if (flag_mri)
1813 stop = mri_comment_field (&stopc);
1817 name = input_line_pointer;
1818 c = get_symbol_end ();
1819 symbolP = symbol_find_or_make (name);
1820 S_SET_EXTERNAL (symbolP);
1822 *input_line_pointer = c;
1823 SKIP_WHITESPACE ();
1824 c = *input_line_pointer;
1825 if (c == ',')
1827 input_line_pointer++;
1828 SKIP_WHITESPACE ();
1829 if (is_end_of_line[(unsigned char) *input_line_pointer])
1830 c = '\n';
1833 while (c == ',');
1835 demand_empty_rest_of_line ();
1837 if (flag_mri)
1838 mri_comment_end (stop, stopc);
1841 /* Handle the MRI IRP and IRPC pseudo-ops. */
1843 void
1844 s_irp (irpc)
1845 int irpc;
1847 char *file;
1848 unsigned int line;
1849 sb s;
1850 const char *err;
1851 sb out;
1853 as_where (&file, &line);
1855 sb_new (&s);
1856 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1857 sb_add_char (&s, *input_line_pointer++);
1859 sb_new (&out);
1861 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
1862 if (err != NULL)
1863 as_bad_where (file, line, "%s", err);
1865 sb_kill (&s);
1867 input_scrub_include_sb (&out, input_line_pointer, 1);
1868 sb_kill (&out);
1869 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1872 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1873 the section to only be linked once. However, this is not supported
1874 by most object file formats. This takes an optional argument,
1875 which is what to do about duplicates. */
1877 void
1878 s_linkonce (ignore)
1879 int ignore ATTRIBUTE_UNUSED;
1881 enum linkonce_type type;
1883 SKIP_WHITESPACE ();
1885 type = LINKONCE_DISCARD;
1887 if (!is_end_of_line[(unsigned char) *input_line_pointer])
1889 char *s;
1890 char c;
1892 s = input_line_pointer;
1893 c = get_symbol_end ();
1894 if (strcasecmp (s, "discard") == 0)
1895 type = LINKONCE_DISCARD;
1896 else if (strcasecmp (s, "one_only") == 0)
1897 type = LINKONCE_ONE_ONLY;
1898 else if (strcasecmp (s, "same_size") == 0)
1899 type = LINKONCE_SAME_SIZE;
1900 else if (strcasecmp (s, "same_contents") == 0)
1901 type = LINKONCE_SAME_CONTENTS;
1902 else
1903 as_warn (_("unrecognized .linkonce type `%s'"), s);
1905 *input_line_pointer = c;
1908 #ifdef obj_handle_link_once
1909 obj_handle_link_once (type);
1910 #else /* ! defined (obj_handle_link_once) */
1911 #ifdef BFD_ASSEMBLER
1913 flagword flags;
1915 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
1916 as_warn (_(".linkonce is not supported for this object file format"));
1918 flags = bfd_get_section_flags (stdoutput, now_seg);
1919 flags |= SEC_LINK_ONCE;
1920 switch (type)
1922 default:
1923 abort ();
1924 case LINKONCE_DISCARD:
1925 flags |= SEC_LINK_DUPLICATES_DISCARD;
1926 break;
1927 case LINKONCE_ONE_ONLY:
1928 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
1929 break;
1930 case LINKONCE_SAME_SIZE:
1931 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
1932 break;
1933 case LINKONCE_SAME_CONTENTS:
1934 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
1935 break;
1937 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
1938 as_bad (_("bfd_set_section_flags: %s"),
1939 bfd_errmsg (bfd_get_error ()));
1941 #else /* ! defined (BFD_ASSEMBLER) */
1942 as_warn (_(".linkonce is not supported for this object file format"));
1943 #endif /* ! defined (BFD_ASSEMBLER) */
1944 #endif /* ! defined (obj_handle_link_once) */
1946 demand_empty_rest_of_line ();
1949 static void
1950 s_lcomm_internal (needs_align, bytes_p)
1951 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1952 (alignment); 0 if it was an ".lcomm" (2 args only). */
1953 int needs_align;
1954 /* 1 if the alignment value should be interpreted as the byte boundary,
1955 rather than the power of 2. */
1956 int bytes_p;
1958 register char *name;
1959 register char c;
1960 register char *p;
1961 register int temp;
1962 register symbolS *symbolP;
1963 segT current_seg = now_seg;
1964 subsegT current_subseg = now_subseg;
1965 const int max_alignment = 15;
1966 int align = 0;
1967 segT bss_seg = bss_section;
1969 name = input_line_pointer;
1970 c = get_symbol_end ();
1971 p = input_line_pointer;
1972 *p = c;
1974 if (name == p)
1976 as_bad (_("expected symbol name"));
1977 discard_rest_of_line ();
1978 return;
1981 SKIP_WHITESPACE ();
1983 /* Accept an optional comma after the name. The comma used to be
1984 required, but Irix 5 cc does not generate it. */
1985 if (*input_line_pointer == ',')
1987 ++input_line_pointer;
1988 SKIP_WHITESPACE ();
1991 if (is_end_of_line[(unsigned char) *input_line_pointer])
1993 as_bad (_("missing size expression"));
1994 return;
1997 if ((temp = get_absolute_expression ()) < 0)
1999 as_warn (_("BSS length (%d) < 0 ignored"), temp);
2000 ignore_rest_of_line ();
2001 return;
2004 #if defined (TC_MIPS) || defined (TC_ALPHA)
2005 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2006 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2008 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2009 if ((unsigned) temp <= bfd_get_gp_size (stdoutput))
2011 bss_seg = subseg_new (".sbss", 1);
2012 seg_info (bss_seg)->bss = 1;
2013 #ifdef BFD_ASSEMBLER
2014 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2015 as_warn (_("error setting flags for \".sbss\": %s"),
2016 bfd_errmsg (bfd_get_error ()));
2017 #endif
2020 #endif
2022 if (!needs_align)
2024 TC_IMPLICIT_LCOMM_ALIGNMENT (temp, align);
2026 /* Still zero unless TC_IMPLICIT_LCOMM_ALIGNMENT set it. */
2027 if (align)
2028 record_alignment (bss_seg, align);
2031 if (needs_align)
2033 align = 0;
2034 SKIP_WHITESPACE ();
2036 if (*input_line_pointer != ',')
2038 as_bad (_("expected comma after size"));
2039 ignore_rest_of_line ();
2040 return;
2043 input_line_pointer++;
2044 SKIP_WHITESPACE ();
2046 if (is_end_of_line[(unsigned char) *input_line_pointer])
2048 as_bad (_("missing alignment"));
2049 return;
2052 align = get_absolute_expression ();
2054 if (bytes_p)
2056 /* Convert to a power of 2. */
2057 if (align != 0)
2059 unsigned int i;
2061 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
2063 if (align != 1)
2064 as_bad (_("alignment not a power of 2"));
2065 align = i;
2069 if (align > max_alignment)
2071 align = max_alignment;
2072 as_warn (_("alignment too large; %d assumed"), align);
2074 else if (align < 0)
2076 align = 0;
2077 as_warn (_("alignment negative; 0 assumed"));
2080 record_alignment (bss_seg, align);
2082 else
2084 /* Assume some objects may require alignment on some systems. */
2085 #if defined (TC_ALPHA) && ! defined (VMS)
2086 if (temp > 1)
2088 align = ffs (temp) - 1;
2089 if (temp % (1 << align))
2090 abort ();
2092 #endif
2095 *p = 0;
2096 symbolP = symbol_find_or_make (name);
2097 *p = c;
2099 if (
2100 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) \
2101 || defined (OBJ_BOUT) || defined (OBJ_MAYBE_BOUT))
2102 #ifdef BFD_ASSEMBLER
2103 (OUTPUT_FLAVOR != bfd_target_aout_flavour
2104 || (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) &&
2105 #else
2106 (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) &&
2107 #endif
2108 #endif
2109 (S_GET_SEGMENT (symbolP) == bss_seg
2110 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
2112 char *pfrag;
2114 subseg_set (bss_seg, 1);
2116 if (align)
2117 frag_align (align, 0, 0);
2119 /* Detach from old frag. */
2120 if (S_GET_SEGMENT (symbolP) == bss_seg)
2121 symbol_get_frag (symbolP)->fr_symbol = NULL;
2123 symbol_set_frag (symbolP, frag_now);
2124 pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
2125 (offsetT) temp, (char *) 0);
2126 *pfrag = 0;
2128 S_SET_SEGMENT (symbolP, bss_seg);
2130 #ifdef OBJ_COFF
2131 /* The symbol may already have been created with a preceding
2132 ".globl" directive -- be careful not to step on storage class
2133 in that case. Otherwise, set it to static. */
2134 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2136 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2138 #endif /* OBJ_COFF */
2140 #ifdef S_SET_SIZE
2141 S_SET_SIZE (symbolP, temp);
2142 #endif
2144 else
2145 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP));
2147 subseg_set (current_seg, current_subseg);
2149 demand_empty_rest_of_line ();
2152 void
2153 s_lcomm (needs_align)
2154 int needs_align;
2156 s_lcomm_internal (needs_align, 0);
2159 void
2160 s_lcomm_bytes (needs_align)
2161 int needs_align;
2163 s_lcomm_internal (needs_align, 1);
2166 void
2167 s_lsym (ignore)
2168 int ignore ATTRIBUTE_UNUSED;
2170 register char *name;
2171 register char c;
2172 register char *p;
2173 expressionS exp;
2174 register symbolS *symbolP;
2176 /* We permit ANY defined expression: BSD4.2 demands constants. */
2177 name = input_line_pointer;
2178 c = get_symbol_end ();
2179 p = input_line_pointer;
2180 *p = c;
2182 if (name == p)
2184 as_bad (_("expected symbol name"));
2185 discard_rest_of_line ();
2186 return;
2189 SKIP_WHITESPACE ();
2191 if (*input_line_pointer != ',')
2193 *p = 0;
2194 as_bad (_("expected comma after \"%s\""), name);
2195 *p = c;
2196 ignore_rest_of_line ();
2197 return;
2200 input_line_pointer++;
2201 expression (&exp);
2203 if (exp.X_op != O_constant
2204 && exp.X_op != O_register)
2206 as_bad (_("bad expression"));
2207 ignore_rest_of_line ();
2208 return;
2211 *p = 0;
2212 symbolP = symbol_find_or_make (name);
2214 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2215 symbolP->sy_desc == 0) out of this test because coff doesn't have
2216 those fields, and I can't see when they'd ever be tripped. I
2217 don't think I understand why they were here so I may have
2218 introduced a bug. As recently as 1.37 didn't have this test
2219 anyway. xoxorich. */
2221 if (S_GET_SEGMENT (symbolP) == undefined_section
2222 && S_GET_VALUE (symbolP) == 0)
2224 /* The name might be an undefined .global symbol; be sure to
2225 keep the "external" bit. */
2226 S_SET_SEGMENT (symbolP,
2227 (exp.X_op == O_constant
2228 ? absolute_section
2229 : reg_section));
2230 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2232 else
2234 as_bad (_("symbol `%s' is already defined"), name);
2237 *p = c;
2238 demand_empty_rest_of_line ();
2241 /* Read a line into an sb. Returns the character that ended the line
2242 or zero if there are no more lines. */
2244 static int
2245 get_line_sb (line)
2246 sb *line;
2248 char quote1, quote2, inquote;
2249 unsigned char c;
2251 if (input_line_pointer[-1] == '\n')
2252 bump_line_counters ();
2254 if (input_line_pointer >= buffer_limit)
2256 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2257 if (buffer_limit == 0)
2258 return 0;
2261 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2262 code needs to be changed. */
2263 if (!flag_m68k_mri)
2264 quote1 = '"';
2265 else
2266 quote1 = '\0';
2268 quote2 = '\0';
2269 if (flag_m68k_mri)
2270 quote2 = '\'';
2271 #ifdef LEX_IS_STRINGQUOTE
2272 quote2 = '\'';
2273 #endif
2275 inquote = '\0';
2277 while ((c = * input_line_pointer ++) != 0
2278 && (!is_end_of_line[c]
2279 || (inquote != '\0' && c != '\n')))
2281 if (inquote == c)
2282 inquote = '\0';
2283 else if (inquote == '\0')
2285 if (c == quote1)
2286 inquote = quote1;
2287 else if (c == quote2)
2288 inquote = quote2;
2291 sb_add_char (line, c);
2294 /* Don't skip multiple end-of-line characters, because that breaks support
2295 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2296 characters but isn't. Instead just skip one end of line character and
2297 return the character skipped so that the caller can re-insert it if
2298 necessary. */
2299 return c;
2302 /* Define a macro. This is an interface to macro.c. */
2304 void
2305 s_macro (ignore)
2306 int ignore ATTRIBUTE_UNUSED;
2308 char *file;
2309 unsigned int line;
2310 sb s;
2311 sb label;
2312 const char *err;
2313 const char *name;
2315 as_where (&file, &line);
2317 sb_new (&s);
2318 while (!is_end_of_line[(unsigned char) *input_line_pointer])
2319 sb_add_char (&s, *input_line_pointer++);
2321 sb_new (&label);
2322 if (line_label != NULL)
2323 sb_add_string (&label, S_GET_NAME (line_label));
2325 err = define_macro (0, &s, &label, get_line_sb, &name);
2326 if (err != NULL)
2327 as_bad_where (file, line, "%s", err);
2328 else
2330 if (line_label != NULL)
2332 S_SET_SEGMENT (line_label, undefined_section);
2333 S_SET_VALUE (line_label, 0);
2334 symbol_set_frag (line_label, &zero_address_frag);
2337 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2338 && hash_find (po_hash, name) != NULL)
2339 || (!flag_m68k_mri
2340 && *name == '.'
2341 && hash_find (po_hash, name + 1) != NULL))
2342 as_warn (_("attempt to redefine pseudo-op `%s' ignored"),
2343 name);
2346 sb_kill (&s);
2349 /* Handle the .mexit pseudo-op, which immediately exits a macro
2350 expansion. */
2352 void
2353 s_mexit (ignore)
2354 int ignore ATTRIBUTE_UNUSED;
2356 cond_exit_macro (macro_nest);
2357 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2360 /* Switch in and out of MRI mode. */
2362 void
2363 s_mri (ignore)
2364 int ignore ATTRIBUTE_UNUSED;
2366 int on, old_flag;
2368 on = get_absolute_expression ();
2369 old_flag = flag_mri;
2370 if (on != 0)
2372 flag_mri = 1;
2373 #ifdef TC_M68K
2374 flag_m68k_mri = 1;
2375 #endif
2376 macro_mri_mode (1);
2378 else
2380 flag_mri = 0;
2381 #ifdef TC_M68K
2382 flag_m68k_mri = 0;
2383 #endif
2384 macro_mri_mode (0);
2387 /* Operator precedence changes in m68k MRI mode, so we need to
2388 update the operator rankings. */
2389 expr_set_precedence ();
2391 #ifdef MRI_MODE_CHANGE
2392 if (on != old_flag)
2393 MRI_MODE_CHANGE (on);
2394 #endif
2396 demand_empty_rest_of_line ();
2399 /* Handle changing the location counter. */
2401 static void
2402 do_org (segment, exp, fill)
2403 segT segment;
2404 expressionS *exp;
2405 int fill;
2407 if (segment != now_seg && segment != absolute_section)
2408 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2410 if (now_seg == absolute_section)
2412 if (fill != 0)
2413 as_warn (_("ignoring fill value in absolute section"));
2414 if (exp->X_op != O_constant)
2416 as_bad (_("only constant offsets supported in absolute section"));
2417 exp->X_add_number = 0;
2419 abs_section_offset = exp->X_add_number;
2421 else
2423 char *p;
2424 symbolS *sym = exp->X_add_symbol;
2425 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2427 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2429 /* Handle complex expressions. */
2430 sym = make_expr_symbol (exp);
2431 off = 0;
2434 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2435 *p = fill;
2439 void
2440 s_org (ignore)
2441 int ignore ATTRIBUTE_UNUSED;
2443 register segT segment;
2444 expressionS exp;
2445 register long temp_fill;
2447 #ifdef md_flush_pending_output
2448 md_flush_pending_output ();
2449 #endif
2451 /* The m68k MRI assembler has a different meaning for .org. It
2452 means to create an absolute section at a given address. We can't
2453 support that--use a linker script instead. */
2454 if (flag_m68k_mri)
2456 as_bad (_("MRI style ORG pseudo-op not supported"));
2457 ignore_rest_of_line ();
2458 return;
2461 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2462 thing as a sub-segment-relative origin. Any absolute origin is
2463 given a warning, then assumed to be segment-relative. Any
2464 segmented origin expression ("foo+42") had better be in the right
2465 segment or the .org is ignored.
2467 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2468 we never know sub-segment sizes when we are reading code. BSD
2469 will crash trying to emit negative numbers of filler bytes in
2470 certain .orgs. We don't crash, but see as-write for that code.
2472 Don't make frag if need_pass_2==1. */
2473 segment = get_known_segmented_expression (&exp);
2474 if (*input_line_pointer == ',')
2476 input_line_pointer++;
2477 temp_fill = get_absolute_expression ();
2479 else
2480 temp_fill = 0;
2482 if (!need_pass_2)
2483 do_org (segment, &exp, temp_fill);
2485 demand_empty_rest_of_line ();
2488 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2489 called by the obj-format routine which handles section changing
2490 when in MRI mode. It will create a new section, and return it. It
2491 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2492 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2493 flags will be set in the section. */
2495 void
2496 s_mri_sect (type)
2497 char *type ATTRIBUTE_UNUSED;
2499 #ifdef TC_M68K
2501 char *name;
2502 char c;
2503 segT seg;
2505 SKIP_WHITESPACE ();
2507 name = input_line_pointer;
2508 if (!ISDIGIT (*name))
2509 c = get_symbol_end ();
2510 else
2514 ++input_line_pointer;
2516 while (ISDIGIT (*input_line_pointer));
2518 c = *input_line_pointer;
2519 *input_line_pointer = '\0';
2522 name = xstrdup (name);
2524 *input_line_pointer = c;
2526 seg = subseg_new (name, 0);
2528 if (*input_line_pointer == ',')
2530 int align;
2532 ++input_line_pointer;
2533 align = get_absolute_expression ();
2534 record_alignment (seg, align);
2537 *type = 'C';
2538 if (*input_line_pointer == ',')
2540 c = *++input_line_pointer;
2541 c = TOUPPER (c);
2542 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2543 *type = c;
2544 else
2545 as_bad (_("unrecognized section type"));
2546 ++input_line_pointer;
2548 #ifdef BFD_ASSEMBLER
2550 flagword flags;
2552 flags = SEC_NO_FLAGS;
2553 if (*type == 'C')
2554 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2555 else if (*type == 'D' || *type == 'M')
2556 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2557 else if (*type == 'R')
2558 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2559 if (flags != SEC_NO_FLAGS)
2561 if (!bfd_set_section_flags (stdoutput, seg, flags))
2562 as_warn (_("error setting flags for \"%s\": %s"),
2563 bfd_section_name (stdoutput, seg),
2564 bfd_errmsg (bfd_get_error ()));
2567 #endif
2570 /* Ignore the HP type. */
2571 if (*input_line_pointer == ',')
2572 input_line_pointer += 2;
2574 demand_empty_rest_of_line ();
2576 #else /* ! TC_M68K */
2577 #ifdef TC_I960
2579 char *name;
2580 char c;
2581 segT seg;
2583 SKIP_WHITESPACE ();
2585 name = input_line_pointer;
2586 c = get_symbol_end ();
2588 name = xstrdup (name);
2590 *input_line_pointer = c;
2592 seg = subseg_new (name, 0);
2594 if (*input_line_pointer != ',')
2595 *type = 'C';
2596 else
2598 char *sectype;
2600 ++input_line_pointer;
2601 SKIP_WHITESPACE ();
2602 sectype = input_line_pointer;
2603 c = get_symbol_end ();
2604 if (*sectype == '\0')
2605 *type = 'C';
2606 else if (strcasecmp (sectype, "text") == 0)
2607 *type = 'C';
2608 else if (strcasecmp (sectype, "data") == 0)
2609 *type = 'D';
2610 else if (strcasecmp (sectype, "romdata") == 0)
2611 *type = 'R';
2612 else
2613 as_warn (_("unrecognized section type `%s'"), sectype);
2614 *input_line_pointer = c;
2617 if (*input_line_pointer == ',')
2619 char *seccmd;
2621 ++input_line_pointer;
2622 SKIP_WHITESPACE ();
2623 seccmd = input_line_pointer;
2624 c = get_symbol_end ();
2625 if (strcasecmp (seccmd, "absolute") == 0)
2627 as_bad (_("absolute sections are not supported"));
2628 *input_line_pointer = c;
2629 ignore_rest_of_line ();
2630 return;
2632 else if (strcasecmp (seccmd, "align") == 0)
2634 int align;
2636 *input_line_pointer = c;
2637 align = get_absolute_expression ();
2638 record_alignment (seg, align);
2640 else
2642 as_warn (_("unrecognized section command `%s'"), seccmd);
2643 *input_line_pointer = c;
2647 demand_empty_rest_of_line ();
2649 #else /* ! TC_I960 */
2650 /* The MRI assembler seems to use different forms of .sect for
2651 different targets. */
2652 as_bad ("MRI mode not supported for this target");
2653 ignore_rest_of_line ();
2654 #endif /* ! TC_I960 */
2655 #endif /* ! TC_M68K */
2658 /* Handle the .print pseudo-op. */
2660 void
2661 s_print (ignore)
2662 int ignore ATTRIBUTE_UNUSED;
2664 char *s;
2665 int len;
2667 s = demand_copy_C_string (&len);
2668 if (s != NULL)
2669 printf ("%s\n", s);
2670 demand_empty_rest_of_line ();
2673 /* Handle the .purgem pseudo-op. */
2675 void
2676 s_purgem (ignore)
2677 int ignore ATTRIBUTE_UNUSED;
2679 if (is_it_end_of_statement ())
2681 demand_empty_rest_of_line ();
2682 return;
2687 char *name;
2688 char c;
2690 SKIP_WHITESPACE ();
2691 name = input_line_pointer;
2692 c = get_symbol_end ();
2693 delete_macro (name);
2694 *input_line_pointer = c;
2695 SKIP_WHITESPACE ();
2697 while (*input_line_pointer++ == ',');
2699 --input_line_pointer;
2700 demand_empty_rest_of_line ();
2703 /* Handle the .rept pseudo-op. */
2705 void
2706 s_bad_endr (ignore)
2707 int ignore ATTRIBUTE_UNUSED;
2709 as_warn (_(".endr encountered without preceeding .rept, .irc, or .irp"));
2710 demand_empty_rest_of_line ();
2713 /* Handle the .rept pseudo-op. */
2715 void
2716 s_rept (ignore)
2717 int ignore ATTRIBUTE_UNUSED;
2719 int count;
2721 count = get_absolute_expression ();
2723 do_repeat (count, "REPT", "ENDR");
2726 /* This function provides a generic repeat block implementation. It allows
2727 different directives to be used as the start/end keys. */
2729 void
2730 do_repeat (count, start, end)
2731 int count;
2732 const char *start;
2733 const char *end;
2735 sb one;
2736 sb many;
2738 sb_new (&one);
2739 if (!buffer_and_nest (start, end, &one, get_line_sb))
2741 as_bad (_("%s without %s"), start, end);
2742 return;
2745 sb_new (&many);
2746 while (count-- > 0)
2747 sb_add_sb (&many, &one);
2749 sb_kill (&one);
2751 input_scrub_include_sb (&many, input_line_pointer, 1);
2752 sb_kill (&many);
2753 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2756 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2757 input buffers to skip. Assumes that conditionals preceding the loop end
2758 are properly nested.
2760 This function makes it easier to implement a premature "break" out of the
2761 loop. The EXTRA arg accounts for other buffers we might have inserted,
2762 such as line substitutions. */
2764 void
2765 end_repeat (extra)
2766 int extra;
2768 cond_exit_macro (macro_nest);
2769 while (extra-- >= 0)
2770 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2773 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2774 this is .equiv, and it is an error if the symbol is already
2775 defined. */
2777 void
2778 s_set (equiv)
2779 int equiv;
2781 register char *name;
2782 register char delim;
2783 register char *end_name;
2784 register symbolS *symbolP;
2786 /* Especial apologies for the random logic:
2787 this just grew, and could be parsed much more simply!
2788 Dean in haste. */
2789 name = input_line_pointer;
2790 delim = get_symbol_end ();
2791 end_name = input_line_pointer;
2792 *end_name = delim;
2794 if (name == end_name)
2796 as_bad (_("expected symbol name"));
2797 discard_rest_of_line ();
2798 return;
2801 SKIP_WHITESPACE ();
2803 if (*input_line_pointer != ',')
2805 *end_name = 0;
2806 as_bad (_("expected comma after \"%s\""), name);
2807 *end_name = delim;
2808 ignore_rest_of_line ();
2809 return;
2812 input_line_pointer++;
2813 *end_name = 0;
2815 if (name[0] == '.' && name[1] == '\0')
2817 /* Turn '. = mumble' into a .org mumble. */
2818 register segT segment;
2819 expressionS exp;
2821 segment = get_known_segmented_expression (&exp);
2823 if (!need_pass_2)
2824 do_org (segment, &exp, 0);
2826 *end_name = delim;
2827 return;
2830 if ((symbolP = symbol_find (name)) == NULL
2831 && (symbolP = md_undefined_symbol (name)) == NULL)
2833 #ifndef NO_LISTING
2834 /* When doing symbol listings, play games with dummy fragments living
2835 outside the normal fragment chain to record the file and line info
2836 for this symbol. */
2837 if (listing & LISTING_SYMBOLS)
2839 extern struct list_info_struct *listing_tail;
2840 fragS *dummy_frag = (fragS *) xmalloc (sizeof (fragS));
2841 memset (dummy_frag, 0, sizeof (fragS));
2842 dummy_frag->fr_type = rs_fill;
2843 dummy_frag->line = listing_tail;
2844 symbolP = symbol_new (name, undefined_section, 0, dummy_frag);
2845 dummy_frag->fr_symbol = symbolP;
2847 else
2848 #endif
2849 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
2851 #ifdef OBJ_COFF
2852 /* "set" symbols are local unless otherwise specified. */
2853 SF_SET_LOCAL (symbolP);
2854 #endif /* OBJ_COFF */
2857 symbol_table_insert (symbolP);
2859 *end_name = delim;
2861 if (equiv
2862 && S_IS_DEFINED (symbolP)
2863 && S_GET_SEGMENT (symbolP) != reg_section)
2864 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP));
2866 pseudo_set (symbolP);
2867 demand_empty_rest_of_line ();
2870 void
2871 s_space (mult)
2872 int mult;
2874 expressionS exp;
2875 expressionS val;
2876 char *p = 0;
2877 char *stop = NULL;
2878 char stopc;
2879 int bytes;
2881 #ifdef md_flush_pending_output
2882 md_flush_pending_output ();
2883 #endif
2885 if (flag_mri)
2886 stop = mri_comment_field (&stopc);
2888 /* In m68k MRI mode, we need to align to a word boundary, unless
2889 this is ds.b. */
2890 if (flag_m68k_mri && mult > 1)
2892 if (now_seg == absolute_section)
2894 abs_section_offset += abs_section_offset & 1;
2895 if (line_label != NULL)
2896 S_SET_VALUE (line_label, abs_section_offset);
2898 else if (mri_common_symbol != NULL)
2900 valueT val;
2902 val = S_GET_VALUE (mri_common_symbol);
2903 if ((val & 1) != 0)
2905 S_SET_VALUE (mri_common_symbol, val + 1);
2906 if (line_label != NULL)
2908 expressionS *symexp;
2910 symexp = symbol_get_value_expression (line_label);
2911 know (symexp->X_op == O_symbol);
2912 know (symexp->X_add_symbol == mri_common_symbol);
2913 symexp->X_add_number += 1;
2917 else
2919 do_align (1, (char *) NULL, 0, 0);
2920 if (line_label != NULL)
2922 symbol_set_frag (line_label, frag_now);
2923 S_SET_VALUE (line_label, frag_now_fix ());
2928 bytes = mult;
2930 expression (&exp);
2932 SKIP_WHITESPACE ();
2933 if (*input_line_pointer == ',')
2935 ++input_line_pointer;
2936 expression (&val);
2938 else
2940 val.X_op = O_constant;
2941 val.X_add_number = 0;
2944 if (val.X_op != O_constant
2945 || val.X_add_number < - 0x80
2946 || val.X_add_number > 0xff
2947 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2949 if (exp.X_op != O_constant)
2950 as_bad (_("unsupported variable size or fill value"));
2951 else
2953 offsetT i;
2955 if (mult == 0)
2956 mult = 1;
2957 bytes = mult * exp.X_add_number;
2958 for (i = 0; i < exp.X_add_number; i++)
2959 emit_expr (&val, mult);
2962 else
2964 if (exp.X_op == O_constant)
2966 long repeat;
2968 repeat = exp.X_add_number;
2969 if (mult)
2970 repeat *= mult;
2971 bytes = repeat;
2972 if (repeat <= 0)
2974 if (!flag_mri)
2975 as_warn (_(".space repeat count is zero, ignored"));
2976 else if (repeat < 0)
2977 as_warn (_(".space repeat count is negative, ignored"));
2978 goto getout;
2981 /* If we are in the absolute section, just bump the offset. */
2982 if (now_seg == absolute_section)
2984 abs_section_offset += repeat;
2985 goto getout;
2988 /* If we are secretly in an MRI common section, then
2989 creating space just increases the size of the common
2990 symbol. */
2991 if (mri_common_symbol != NULL)
2993 S_SET_VALUE (mri_common_symbol,
2994 S_GET_VALUE (mri_common_symbol) + repeat);
2995 goto getout;
2998 if (!need_pass_2)
2999 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3000 (offsetT) repeat, (char *) 0);
3002 else
3004 if (now_seg == absolute_section)
3006 as_bad (_("space allocation too complex in absolute section"));
3007 subseg_set (text_section, 0);
3010 if (mri_common_symbol != NULL)
3012 as_bad (_("space allocation too complex in common section"));
3013 mri_common_symbol = NULL;
3016 if (!need_pass_2)
3017 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3018 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3021 if (p)
3022 *p = val.X_add_number;
3025 getout:
3027 /* In MRI mode, after an odd number of bytes, we must align to an
3028 even word boundary, unless the next instruction is a dc.b, ds.b
3029 or dcb.b. */
3030 if (flag_mri && (bytes & 1) != 0)
3031 mri_pending_align = 1;
3033 demand_empty_rest_of_line ();
3035 if (flag_mri)
3036 mri_comment_end (stop, stopc);
3039 /* This is like s_space, but the value is a floating point number with
3040 the given precision. This is for the MRI dcb.s pseudo-op and
3041 friends. */
3043 void
3044 s_float_space (float_type)
3045 int float_type;
3047 offsetT count;
3048 int flen;
3049 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3050 char *stop = NULL;
3051 char stopc;
3053 if (flag_mri)
3054 stop = mri_comment_field (&stopc);
3056 count = get_absolute_expression ();
3058 SKIP_WHITESPACE ();
3059 if (*input_line_pointer != ',')
3061 as_bad (_("missing value"));
3062 ignore_rest_of_line ();
3063 if (flag_mri)
3064 mri_comment_end (stop, stopc);
3065 return;
3068 ++input_line_pointer;
3070 SKIP_WHITESPACE ();
3072 /* Skip any 0{letter} that may be present. Don't even check if the
3073 * letter is legal. */
3074 if (input_line_pointer[0] == '0'
3075 && ISALPHA (input_line_pointer[1]))
3076 input_line_pointer += 2;
3078 /* Accept :xxxx, where the x's are hex digits, for a floating point
3079 with the exact digits specified. */
3080 if (input_line_pointer[0] == ':')
3082 flen = hex_float (float_type, temp);
3083 if (flen < 0)
3085 ignore_rest_of_line ();
3086 if (flag_mri)
3087 mri_comment_end (stop, stopc);
3088 return;
3091 else
3093 char *err;
3095 err = md_atof (float_type, temp, &flen);
3096 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3097 know (flen > 0);
3098 if (err)
3100 as_bad (_("bad floating literal: %s"), err);
3101 ignore_rest_of_line ();
3102 if (flag_mri)
3103 mri_comment_end (stop, stopc);
3104 return;
3108 while (--count >= 0)
3110 char *p;
3112 p = frag_more (flen);
3113 memcpy (p, temp, (unsigned int) flen);
3116 demand_empty_rest_of_line ();
3118 if (flag_mri)
3119 mri_comment_end (stop, stopc);
3122 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3124 void
3125 s_struct (ignore)
3126 int ignore ATTRIBUTE_UNUSED;
3128 char *stop = NULL;
3129 char stopc;
3131 if (flag_mri)
3132 stop = mri_comment_field (&stopc);
3133 abs_section_offset = get_absolute_expression ();
3134 subseg_set (absolute_section, 0);
3135 demand_empty_rest_of_line ();
3136 if (flag_mri)
3137 mri_comment_end (stop, stopc);
3140 void
3141 s_text (ignore)
3142 int ignore ATTRIBUTE_UNUSED;
3144 register int temp;
3146 temp = get_absolute_expression ();
3147 subseg_set (text_section, (subsegT) temp);
3148 demand_empty_rest_of_line ();
3149 #ifdef OBJ_VMS
3150 const_flag &= ~IN_DEFAULT_SECTION;
3151 #endif
3154 void
3155 demand_empty_rest_of_line ()
3157 SKIP_WHITESPACE ();
3158 if (is_end_of_line[(unsigned char) *input_line_pointer])
3159 input_line_pointer++;
3160 else
3161 ignore_rest_of_line ();
3163 /* Return having already swallowed end-of-line. */
3166 void
3167 ignore_rest_of_line ()
3169 /* For suspect lines: gives warning. */
3170 if (!is_end_of_line[(unsigned char) *input_line_pointer])
3172 if (ISPRINT (*input_line_pointer))
3173 as_warn (_("rest of line ignored; first ignored character is `%c'"),
3174 *input_line_pointer);
3175 else
3176 as_warn (_("rest of line ignored; first ignored character valued 0x%x"),
3177 *input_line_pointer);
3179 while (input_line_pointer < buffer_limit
3180 && !is_end_of_line[(unsigned char) *input_line_pointer])
3181 input_line_pointer++;
3184 input_line_pointer++;
3186 /* Return pointing just after end-of-line. */
3187 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3190 void
3191 discard_rest_of_line ()
3193 while (input_line_pointer < buffer_limit
3194 && !is_end_of_line[(unsigned char) *input_line_pointer])
3195 input_line_pointer++;
3197 input_line_pointer++;
3199 /* Return pointing just after end-of-line. */
3200 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3203 /* In: Pointer to a symbol.
3204 Input_line_pointer->expression.
3206 Out: Input_line_pointer->just after any whitespace after expression.
3207 Tried to set symbol to value of expression.
3208 Will change symbols type, value, and frag; */
3210 void
3211 pseudo_set (symbolP)
3212 symbolS *symbolP;
3214 expressionS exp;
3215 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3216 int ext;
3217 #endif /* OBJ_AOUT or OBJ_BOUT */
3219 know (symbolP); /* NULL pointer is logic error. */
3220 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3221 ext = S_IS_EXTERNAL (symbolP);
3222 #endif /* OBJ_AOUT or OBJ_BOUT */
3224 (void) expression (&exp);
3226 if (exp.X_op == O_illegal)
3227 as_bad (_("illegal expression"));
3228 else if (exp.X_op == O_absent)
3229 as_bad (_("missing expression"));
3230 else if (exp.X_op == O_big)
3232 if (exp.X_add_number > 0)
3233 as_bad (_("bignum invalid"));
3234 else
3235 as_bad (_("floating point number invalid"));
3237 else if (exp.X_op == O_subtract
3238 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3239 && (symbol_get_frag (exp.X_add_symbol)
3240 == symbol_get_frag (exp.X_op_symbol)))
3242 exp.X_op = O_constant;
3243 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3244 - S_GET_VALUE (exp.X_op_symbol));
3247 switch (exp.X_op)
3249 case O_illegal:
3250 case O_absent:
3251 case O_big:
3252 exp.X_add_number = 0;
3253 /* Fall through. */
3254 case O_constant:
3255 S_SET_SEGMENT (symbolP, absolute_section);
3256 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3257 if (ext)
3258 S_SET_EXTERNAL (symbolP);
3259 else
3260 S_CLEAR_EXTERNAL (symbolP);
3261 #endif /* OBJ_AOUT or OBJ_BOUT */
3262 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3263 if (exp.X_op != O_constant)
3264 symbol_set_frag (symbolP, &zero_address_frag);
3265 break;
3267 case O_register:
3268 S_SET_SEGMENT (symbolP, reg_section);
3269 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3270 symbol_set_frag (symbolP, &zero_address_frag);
3271 break;
3273 case O_symbol:
3274 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
3275 || exp.X_add_number != 0)
3276 symbol_set_value_expression (symbolP, &exp);
3277 else if (symbol_section_p (symbolP))
3278 as_bad ("attempt to set value of section symbol");
3279 else
3281 symbolS *s = exp.X_add_symbol;
3283 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
3284 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3285 if (ext)
3286 S_SET_EXTERNAL (symbolP);
3287 else
3288 S_CLEAR_EXTERNAL (symbolP);
3289 #endif /* OBJ_AOUT or OBJ_BOUT */
3290 S_SET_VALUE (symbolP,
3291 exp.X_add_number + S_GET_VALUE (s));
3292 symbol_set_frag (symbolP, symbol_get_frag (s));
3293 copy_symbol_attributes (symbolP, s);
3295 break;
3297 default:
3298 /* The value is some complex expression.
3299 FIXME: Should we set the segment to anything? */
3300 symbol_set_value_expression (symbolP, &exp);
3301 break;
3305 /* cons()
3307 CONStruct more frag of .bytes, or .words etc.
3308 Should need_pass_2 be 1 then emit no frag(s).
3309 This understands EXPRESSIONS.
3311 Bug (?)
3313 This has a split personality. We use expression() to read the
3314 value. We can detect if the value won't fit in a byte or word.
3315 But we can't detect if expression() discarded significant digits
3316 in the case of a long. Not worth the crocks required to fix it. */
3318 /* Select a parser for cons expressions. */
3320 /* Some targets need to parse the expression in various fancy ways.
3321 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3322 (for example, the HPPA does this). Otherwise, you can define
3323 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3324 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3325 are defined, which is the normal case, then only simple expressions
3326 are permitted. */
3328 #ifdef TC_M68K
3329 static void
3330 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3331 #endif
3333 #ifndef TC_PARSE_CONS_EXPRESSION
3334 #ifdef BITFIELD_CONS_EXPRESSIONS
3335 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3336 static void
3337 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3338 #endif
3339 #ifdef REPEAT_CONS_EXPRESSIONS
3340 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3341 static void
3342 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3343 #endif
3345 /* If we haven't gotten one yet, just call expression. */
3346 #ifndef TC_PARSE_CONS_EXPRESSION
3347 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3348 #endif
3349 #endif
3351 void
3352 do_parse_cons_expression (expressionS *exp,
3353 int nbytes ATTRIBUTE_UNUSED)
3355 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3359 /* Worker to do .byte etc statements.
3360 Clobbers input_line_pointer and checks end-of-line. */
3362 static void
3363 cons_worker (nbytes, rva)
3364 register int nbytes; /* 1=.byte, 2=.word, 4=.long. */
3365 int rva;
3367 int c;
3368 expressionS exp;
3369 char *stop = NULL;
3370 char stopc;
3372 #ifdef md_flush_pending_output
3373 md_flush_pending_output ();
3374 #endif
3376 if (flag_mri)
3377 stop = mri_comment_field (&stopc);
3379 if (is_it_end_of_statement ())
3381 demand_empty_rest_of_line ();
3382 if (flag_mri)
3383 mri_comment_end (stop, stopc);
3384 return;
3387 #ifdef md_cons_align
3388 md_cons_align (nbytes);
3389 #endif
3391 c = 0;
3394 #ifdef TC_M68K
3395 if (flag_m68k_mri)
3396 parse_mri_cons (&exp, (unsigned int) nbytes);
3397 else
3398 #endif
3399 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3401 if (rva)
3403 if (exp.X_op == O_symbol)
3404 exp.X_op = O_symbol_rva;
3405 else
3406 as_fatal (_("rva without symbol"));
3408 emit_expr (&exp, (unsigned int) nbytes);
3409 ++c;
3411 while (*input_line_pointer++ == ',');
3413 /* In MRI mode, after an odd number of bytes, we must align to an
3414 even word boundary, unless the next instruction is a dc.b, ds.b
3415 or dcb.b. */
3416 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3417 mri_pending_align = 1;
3419 input_line_pointer--; /* Put terminator back into stream. */
3421 demand_empty_rest_of_line ();
3423 if (flag_mri)
3424 mri_comment_end (stop, stopc);
3427 void
3428 cons (size)
3429 int size;
3431 cons_worker (size, 0);
3434 void
3435 s_rva (size)
3436 int size;
3438 cons_worker (size, 1);
3441 /* Put the contents of expression EXP into the object file using
3442 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3444 void
3445 emit_expr (exp, nbytes)
3446 expressionS *exp;
3447 unsigned int nbytes;
3449 operatorT op;
3450 register char *p;
3451 valueT extra_digit = 0;
3453 /* Don't do anything if we are going to make another pass. */
3454 if (need_pass_2)
3455 return;
3457 dot_value = frag_now_fix ();
3459 #ifndef NO_LISTING
3460 #ifdef OBJ_ELF
3461 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3462 appear as a four byte positive constant in the .line section,
3463 followed by a 2 byte 0xffff. Look for that case here. */
3465 static int dwarf_line = -1;
3467 if (strcmp (segment_name (now_seg), ".line") != 0)
3468 dwarf_line = -1;
3469 else if (dwarf_line >= 0
3470 && nbytes == 2
3471 && exp->X_op == O_constant
3472 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3473 listing_source_line ((unsigned int) dwarf_line);
3474 else if (nbytes == 4
3475 && exp->X_op == O_constant
3476 && exp->X_add_number >= 0)
3477 dwarf_line = exp->X_add_number;
3478 else
3479 dwarf_line = -1;
3482 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3483 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3484 AT_sibling (0x12) followed by a four byte address of the sibling
3485 followed by a 2 byte AT_name (0x38) followed by the name of the
3486 file. We look for that case here. */
3488 static int dwarf_file = 0;
3490 if (strcmp (segment_name (now_seg), ".debug") != 0)
3491 dwarf_file = 0;
3492 else if (dwarf_file == 0
3493 && nbytes == 2
3494 && exp->X_op == O_constant
3495 && exp->X_add_number == 0x11)
3496 dwarf_file = 1;
3497 else if (dwarf_file == 1
3498 && nbytes == 2
3499 && exp->X_op == O_constant
3500 && exp->X_add_number == 0x12)
3501 dwarf_file = 2;
3502 else if (dwarf_file == 2
3503 && nbytes == 4)
3504 dwarf_file = 3;
3505 else if (dwarf_file == 3
3506 && nbytes == 2
3507 && exp->X_op == O_constant
3508 && exp->X_add_number == 0x38)
3509 dwarf_file = 4;
3510 else
3511 dwarf_file = 0;
3513 /* The variable dwarf_file_string tells stringer that the string
3514 may be the name of the source file. */
3515 if (dwarf_file == 4)
3516 dwarf_file_string = 1;
3517 else
3518 dwarf_file_string = 0;
3520 #endif
3521 #endif
3523 if (check_eh_frame (exp, &nbytes))
3524 return;
3526 op = exp->X_op;
3528 /* Allow `.word 0' in the absolute section. */
3529 if (now_seg == absolute_section)
3531 if (op != O_constant || exp->X_add_number != 0)
3532 as_bad (_("attempt to store value in absolute section"));
3533 abs_section_offset += nbytes;
3534 return;
3537 /* Handle a negative bignum. */
3538 if (op == O_uminus
3539 && exp->X_add_number == 0
3540 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3541 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3543 int i;
3544 unsigned long carry;
3546 exp = symbol_get_value_expression (exp->X_add_symbol);
3548 /* Negate the bignum: one's complement each digit and add 1. */
3549 carry = 1;
3550 for (i = 0; i < exp->X_add_number; i++)
3552 unsigned long next;
3554 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
3555 & LITTLENUM_MASK)
3556 + carry);
3557 generic_bignum[i] = next & LITTLENUM_MASK;
3558 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3561 /* We can ignore any carry out, because it will be handled by
3562 extra_digit if it is needed. */
3564 extra_digit = (valueT) -1;
3565 op = O_big;
3568 if (op == O_absent || op == O_illegal)
3570 as_warn (_("zero assumed for missing expression"));
3571 exp->X_add_number = 0;
3572 op = O_constant;
3574 else if (op == O_big && exp->X_add_number <= 0)
3576 as_bad (_("floating point number invalid"));
3577 exp->X_add_number = 0;
3578 op = O_constant;
3580 else if (op == O_register)
3582 as_warn (_("register value used as expression"));
3583 op = O_constant;
3586 p = frag_more ((int) nbytes);
3588 #ifndef WORKING_DOT_WORD
3589 /* If we have the difference of two symbols in a word, save it on
3590 the broken_words list. See the code in write.c. */
3591 if (op == O_subtract && nbytes == 2)
3593 struct broken_word *x;
3595 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3596 x->next_broken_word = broken_words;
3597 broken_words = x;
3598 x->seg = now_seg;
3599 x->subseg = now_subseg;
3600 x->frag = frag_now;
3601 x->word_goes_here = p;
3602 x->dispfrag = 0;
3603 x->add = exp->X_add_symbol;
3604 x->sub = exp->X_op_symbol;
3605 x->addnum = exp->X_add_number;
3606 x->added = 0;
3607 x->use_jump = 0;
3608 new_broken_words++;
3609 return;
3611 #endif
3613 /* If we have an integer, but the number of bytes is too large to
3614 pass to md_number_to_chars, handle it as a bignum. */
3615 if (op == O_constant && nbytes > sizeof (valueT))
3617 valueT val;
3618 int gencnt;
3620 if (!exp->X_unsigned && exp->X_add_number < 0)
3621 extra_digit = (valueT) -1;
3622 val = (valueT) exp->X_add_number;
3623 gencnt = 0;
3626 generic_bignum[gencnt] = val & LITTLENUM_MASK;
3627 val >>= LITTLENUM_NUMBER_OF_BITS;
3628 ++gencnt;
3630 while (val != 0);
3631 op = exp->X_op = O_big;
3632 exp->X_add_number = gencnt;
3635 if (op == O_constant)
3637 register valueT get;
3638 register valueT use;
3639 register valueT mask;
3640 valueT hibit;
3641 register valueT unmask;
3643 /* JF << of >= number of bits in the object is undefined. In
3644 particular SPARC (Sun 4) has problems. */
3645 if (nbytes >= sizeof (valueT))
3647 mask = 0;
3648 if (nbytes > sizeof (valueT))
3649 hibit = 0;
3650 else
3651 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3653 else
3655 /* Don't store these bits. */
3656 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3657 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3660 unmask = ~mask; /* Do store these bits. */
3662 #ifdef NEVER
3663 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3664 mask = ~(unmask >> 1); /* Includes sign bit now. */
3665 #endif
3667 get = exp->X_add_number;
3668 use = get & unmask;
3669 if ((get & mask) != 0
3670 && ((get & mask) != mask
3671 || (get & hibit) == 0))
3672 { /* Leading bits contain both 0s & 1s. */
3673 as_warn (_("value 0x%lx truncated to 0x%lx"),
3674 (unsigned long) get, (unsigned long) use);
3676 /* Put bytes in right order. */
3677 md_number_to_chars (p, use, (int) nbytes);
3679 else if (op == O_big)
3681 unsigned int size;
3682 LITTLENUM_TYPE *nums;
3684 know (nbytes % CHARS_PER_LITTLENUM == 0);
3686 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3687 if (nbytes < size)
3689 as_warn (_("bignum truncated to %d bytes"), nbytes);
3690 size = nbytes;
3693 if (target_big_endian)
3695 while (nbytes > size)
3697 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3698 nbytes -= CHARS_PER_LITTLENUM;
3699 p += CHARS_PER_LITTLENUM;
3702 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3703 while (size >= CHARS_PER_LITTLENUM)
3705 --nums;
3706 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3707 size -= CHARS_PER_LITTLENUM;
3708 p += CHARS_PER_LITTLENUM;
3711 else
3713 nums = generic_bignum;
3714 while (size >= CHARS_PER_LITTLENUM)
3716 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3717 ++nums;
3718 size -= CHARS_PER_LITTLENUM;
3719 p += CHARS_PER_LITTLENUM;
3720 nbytes -= CHARS_PER_LITTLENUM;
3723 while (nbytes >= CHARS_PER_LITTLENUM)
3725 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3726 nbytes -= CHARS_PER_LITTLENUM;
3727 p += CHARS_PER_LITTLENUM;
3731 else
3733 memset (p, 0, nbytes);
3735 /* Now we need to generate a fixS to record the symbol value.
3736 This is easy for BFD. For other targets it can be more
3737 complex. For very complex cases (currently, the HPPA and
3738 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3739 want. For simpler cases, you can define TC_CONS_RELOC to be
3740 the name of the reloc code that should be stored in the fixS.
3741 If neither is defined, the code uses NO_RELOC if it is
3742 defined, and otherwise uses 0. */
3744 #ifdef BFD_ASSEMBLER
3745 #ifdef TC_CONS_FIX_NEW
3746 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3747 #else
3749 bfd_reloc_code_real_type r;
3751 switch (nbytes)
3753 case 1:
3754 r = BFD_RELOC_8;
3755 break;
3756 case 2:
3757 r = BFD_RELOC_16;
3758 break;
3759 case 4:
3760 r = BFD_RELOC_32;
3761 break;
3762 case 8:
3763 r = BFD_RELOC_64;
3764 break;
3765 default:
3766 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3767 r = BFD_RELOC_32;
3768 break;
3770 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3771 0, r);
3773 #endif
3774 #else
3775 #ifdef TC_CONS_FIX_NEW
3776 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3777 #else
3778 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3779 it is defined, otherwise use NO_RELOC if it is defined,
3780 otherwise use 0. */
3781 #ifndef TC_CONS_RELOC
3782 #ifdef NO_RELOC
3783 #define TC_CONS_RELOC NO_RELOC
3784 #else
3785 #define TC_CONS_RELOC 0
3786 #endif
3787 #endif
3788 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
3789 TC_CONS_RELOC);
3790 #endif /* TC_CONS_FIX_NEW */
3791 #endif /* BFD_ASSEMBLER */
3795 #ifdef BITFIELD_CONS_EXPRESSIONS
3797 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3798 w:x,y:z, where w and y are bitwidths and x and y are values. They
3799 then pack them all together. We do a little better in that we allow
3800 them in words, longs, etc. and we'll pack them in target byte order
3801 for you.
3803 The rules are: pack least significat bit first, if a field doesn't
3804 entirely fit, put it in the next unit. Overflowing the bitfield is
3805 explicitly *not* even a warning. The bitwidth should be considered
3806 a "mask".
3808 To use this function the tc-XXX.h file should define
3809 BITFIELD_CONS_EXPRESSIONS. */
3811 static void
3812 parse_bitfield_cons (exp, nbytes)
3813 expressionS *exp;
3814 unsigned int nbytes;
3816 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3817 char *hold = input_line_pointer;
3819 (void) expression (exp);
3821 if (*input_line_pointer == ':')
3823 /* Bitfields. */
3824 long value = 0;
3826 for (;;)
3828 unsigned long width;
3830 if (*input_line_pointer != ':')
3832 input_line_pointer = hold;
3833 break;
3834 } /* Next piece is not a bitfield. */
3836 /* In the general case, we can't allow
3837 full expressions with symbol
3838 differences and such. The relocation
3839 entries for symbols not defined in this
3840 assembly would require arbitrary field
3841 widths, positions, and masks which most
3842 of our current object formats don't
3843 support.
3845 In the specific case where a symbol
3846 *is* defined in this assembly, we
3847 *could* build fixups and track it, but
3848 this could lead to confusion for the
3849 backends. I'm lazy. I'll take any
3850 SEG_ABSOLUTE. I think that means that
3851 you can use a previous .set or
3852 .equ type symbol. xoxorich. */
3854 if (exp->X_op == O_absent)
3856 as_warn (_("using a bit field width of zero"));
3857 exp->X_add_number = 0;
3858 exp->X_op = O_constant;
3859 } /* Implied zero width bitfield. */
3861 if (exp->X_op != O_constant)
3863 *input_line_pointer = '\0';
3864 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
3865 *input_line_pointer = ':';
3866 demand_empty_rest_of_line ();
3867 return;
3868 } /* Too complex. */
3870 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3872 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3873 width, nbytes, (BITS_PER_CHAR * nbytes));
3874 width = BITS_PER_CHAR * nbytes;
3875 } /* Too big. */
3877 if (width > bits_available)
3879 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3880 input_line_pointer = hold;
3881 exp->X_add_number = value;
3882 break;
3883 } /* Won't fit. */
3885 /* Skip ':'. */
3886 hold = ++input_line_pointer;
3888 (void) expression (exp);
3889 if (exp->X_op != O_constant)
3891 char cache = *input_line_pointer;
3893 *input_line_pointer = '\0';
3894 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
3895 *input_line_pointer = cache;
3896 demand_empty_rest_of_line ();
3897 return;
3898 } /* Too complex. */
3900 value |= ((~(-1 << width) & exp->X_add_number)
3901 << ((BITS_PER_CHAR * nbytes) - bits_available));
3903 if ((bits_available -= width) == 0
3904 || is_it_end_of_statement ()
3905 || *input_line_pointer != ',')
3907 break;
3908 } /* All the bitfields we're gonna get. */
3910 hold = ++input_line_pointer;
3911 (void) expression (exp);
3914 exp->X_add_number = value;
3915 exp->X_op = O_constant;
3916 exp->X_unsigned = 1;
3920 #endif /* BITFIELD_CONS_EXPRESSIONS */
3922 /* Handle an MRI style string expression. */
3924 #ifdef TC_M68K
3925 static void
3926 parse_mri_cons (exp, nbytes)
3927 expressionS *exp;
3928 unsigned int nbytes;
3930 if (*input_line_pointer != '\''
3931 && (input_line_pointer[1] != '\''
3932 || (*input_line_pointer != 'A'
3933 && *input_line_pointer != 'E')))
3934 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3935 else
3937 unsigned int scan;
3938 unsigned int result = 0;
3940 /* An MRI style string. Cut into as many bytes as will fit into
3941 a nbyte chunk, left justify if necessary, and separate with
3942 commas so we can try again later. */
3943 if (*input_line_pointer == 'A')
3944 ++input_line_pointer;
3945 else if (*input_line_pointer == 'E')
3947 as_bad (_("EBCDIC constants are not supported"));
3948 ++input_line_pointer;
3951 input_line_pointer++;
3952 for (scan = 0; scan < nbytes; scan++)
3954 if (*input_line_pointer == '\'')
3956 if (input_line_pointer[1] == '\'')
3958 input_line_pointer++;
3960 else
3961 break;
3963 result = (result << 8) | (*input_line_pointer++);
3966 /* Left justify. */
3967 while (scan < nbytes)
3969 result <<= 8;
3970 scan++;
3973 /* Create correct expression. */
3974 exp->X_op = O_constant;
3975 exp->X_add_number = result;
3977 /* Fake it so that we can read the next char too. */
3978 if (input_line_pointer[0] != '\'' ||
3979 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3981 input_line_pointer -= 2;
3982 input_line_pointer[0] = ',';
3983 input_line_pointer[1] = '\'';
3985 else
3986 input_line_pointer++;
3989 #endif /* TC_M68K */
3991 #ifdef REPEAT_CONS_EXPRESSIONS
3993 /* Parse a repeat expression for cons. This is used by the MIPS
3994 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3995 object file COUNT times.
3997 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3999 static void
4000 parse_repeat_cons (exp, nbytes)
4001 expressionS *exp;
4002 unsigned int nbytes;
4004 expressionS count;
4005 register int i;
4007 expression (exp);
4009 if (*input_line_pointer != ':')
4011 /* No repeat count. */
4012 return;
4015 ++input_line_pointer;
4016 expression (&count);
4017 if (count.X_op != O_constant
4018 || count.X_add_number <= 0)
4020 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4021 return;
4024 /* The cons function is going to output this expression once. So we
4025 output it count - 1 times. */
4026 for (i = count.X_add_number - 1; i > 0; i--)
4027 emit_expr (exp, nbytes);
4030 #endif /* REPEAT_CONS_EXPRESSIONS */
4032 /* Parse a floating point number represented as a hex constant. This
4033 permits users to specify the exact bits they want in the floating
4034 point number. */
4036 static int
4037 hex_float (float_type, bytes)
4038 int float_type;
4039 char *bytes;
4041 int length;
4042 int i;
4044 switch (float_type)
4046 case 'f':
4047 case 'F':
4048 case 's':
4049 case 'S':
4050 length = 4;
4051 break;
4053 case 'd':
4054 case 'D':
4055 case 'r':
4056 case 'R':
4057 length = 8;
4058 break;
4060 case 'x':
4061 case 'X':
4062 length = 12;
4063 break;
4065 case 'p':
4066 case 'P':
4067 length = 12;
4068 break;
4070 default:
4071 as_bad (_("unknown floating type type '%c'"), float_type);
4072 return -1;
4075 /* It would be nice if we could go through expression to parse the
4076 hex constant, but if we get a bignum it's a pain to sort it into
4077 the buffer correctly. */
4078 i = 0;
4079 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4081 int d;
4083 /* The MRI assembler accepts arbitrary underscores strewn about
4084 through the hex constant, so we ignore them as well. */
4085 if (*input_line_pointer == '_')
4087 ++input_line_pointer;
4088 continue;
4091 if (i >= length)
4093 as_warn (_("floating point constant too large"));
4094 return -1;
4096 d = hex_value (*input_line_pointer) << 4;
4097 ++input_line_pointer;
4098 while (*input_line_pointer == '_')
4099 ++input_line_pointer;
4100 if (hex_p (*input_line_pointer))
4102 d += hex_value (*input_line_pointer);
4103 ++input_line_pointer;
4105 if (target_big_endian)
4106 bytes[i] = d;
4107 else
4108 bytes[length - i - 1] = d;
4109 ++i;
4112 if (i < length)
4114 if (target_big_endian)
4115 memset (bytes + i, 0, length - i);
4116 else
4117 memset (bytes, 0, length - i);
4120 return length;
4123 /* float_cons()
4125 CONStruct some more frag chars of .floats .ffloats etc.
4126 Makes 0 or more new frags.
4127 If need_pass_2 == 1, no frags are emitted.
4128 This understands only floating literals, not expressions. Sorry.
4130 A floating constant is defined by atof_generic(), except it is preceded
4131 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4132 reading, I decided to be incompatible. This always tries to give you
4133 rounded bits to the precision of the pseudo-op. Former AS did premature
4134 truncatation, restored noisy bits instead of trailing 0s AND gave you
4135 a choice of 2 flavours of noise according to which of 2 floating-point
4136 scanners you directed AS to use.
4138 In: input_line_pointer->whitespace before, or '0' of flonum. */
4140 void
4141 float_cons (float_type)
4142 /* Clobbers input_line-pointer, checks end-of-line. */
4143 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
4145 register char *p;
4146 int length; /* Number of chars in an object. */
4147 register char *err; /* Error from scanning floating literal. */
4148 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4150 if (is_it_end_of_statement ())
4152 demand_empty_rest_of_line ();
4153 return;
4156 #ifdef md_flush_pending_output
4157 md_flush_pending_output ();
4158 #endif
4162 /* input_line_pointer->1st char of a flonum (we hope!). */
4163 SKIP_WHITESPACE ();
4165 /* Skip any 0{letter} that may be present. Don't even check if the
4166 letter is legal. Someone may invent a "z" format and this routine
4167 has no use for such information. Lusers beware: you get
4168 diagnostics if your input is ill-conditioned. */
4169 if (input_line_pointer[0] == '0'
4170 && ISALPHA (input_line_pointer[1]))
4171 input_line_pointer += 2;
4173 /* Accept :xxxx, where the x's are hex digits, for a floating
4174 point with the exact digits specified. */
4175 if (input_line_pointer[0] == ':')
4177 ++input_line_pointer;
4178 length = hex_float (float_type, temp);
4179 if (length < 0)
4181 ignore_rest_of_line ();
4182 return;
4185 else
4187 err = md_atof (float_type, temp, &length);
4188 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4189 know (length > 0);
4190 if (err)
4192 as_bad (_("bad floating literal: %s"), err);
4193 ignore_rest_of_line ();
4194 return;
4198 if (!need_pass_2)
4200 int count;
4202 count = 1;
4204 #ifdef REPEAT_CONS_EXPRESSIONS
4205 if (*input_line_pointer == ':')
4207 expressionS count_exp;
4209 ++input_line_pointer;
4210 expression (&count_exp);
4212 if (count_exp.X_op != O_constant
4213 || count_exp.X_add_number <= 0)
4214 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4215 else
4216 count = count_exp.X_add_number;
4218 #endif
4220 while (--count >= 0)
4222 p = frag_more (length);
4223 memcpy (p, temp, (unsigned int) length);
4226 SKIP_WHITESPACE ();
4228 while (*input_line_pointer++ == ',');
4230 /* Put terminator back into stream. */
4231 --input_line_pointer;
4232 demand_empty_rest_of_line ();
4235 /* Return the size of a LEB128 value. */
4237 static inline int
4238 sizeof_sleb128 (value)
4239 offsetT value;
4241 register int size = 0;
4242 register unsigned byte;
4246 byte = (value & 0x7f);
4247 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4248 Fortunately, we can structure things so that the extra work reduces
4249 to a noop on systems that do things "properly". */
4250 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4251 size += 1;
4253 while (!(((value == 0) && ((byte & 0x40) == 0))
4254 || ((value == -1) && ((byte & 0x40) != 0))));
4256 return size;
4259 static inline int
4260 sizeof_uleb128 (value)
4261 valueT value;
4263 register int size = 0;
4264 register unsigned byte;
4268 byte = (value & 0x7f);
4269 value >>= 7;
4270 size += 1;
4272 while (value != 0);
4274 return size;
4278 sizeof_leb128 (value, sign)
4279 valueT value;
4280 int sign;
4282 if (sign)
4283 return sizeof_sleb128 ((offsetT) value);
4284 else
4285 return sizeof_uleb128 (value);
4288 /* Output a LEB128 value. */
4290 static inline int
4291 output_sleb128 (p, value)
4292 char *p;
4293 offsetT value;
4295 register char *orig = p;
4296 register int more;
4300 unsigned byte = (value & 0x7f);
4302 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4303 Fortunately, we can structure things so that the extra work reduces
4304 to a noop on systems that do things "properly". */
4305 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4307 more = !((((value == 0) && ((byte & 0x40) == 0))
4308 || ((value == -1) && ((byte & 0x40) != 0))));
4309 if (more)
4310 byte |= 0x80;
4312 *p++ = byte;
4314 while (more);
4316 return p - orig;
4319 static inline int
4320 output_uleb128 (p, value)
4321 char *p;
4322 valueT value;
4324 char *orig = p;
4328 unsigned byte = (value & 0x7f);
4329 value >>= 7;
4330 if (value != 0)
4331 /* More bytes to follow. */
4332 byte |= 0x80;
4334 *p++ = byte;
4336 while (value != 0);
4338 return p - orig;
4342 output_leb128 (p, value, sign)
4343 char *p;
4344 valueT value;
4345 int sign;
4347 if (sign)
4348 return output_sleb128 (p, (offsetT) value);
4349 else
4350 return output_uleb128 (p, value);
4353 /* Do the same for bignums. We combine sizeof with output here in that
4354 we don't output for NULL values of P. It isn't really as critical as
4355 for "normal" values that this be streamlined. */
4357 static inline int
4358 output_big_sleb128 (p, bignum, size)
4359 char *p;
4360 LITTLENUM_TYPE *bignum;
4361 int size;
4363 char *orig = p;
4364 valueT val = 0;
4365 int loaded = 0;
4366 unsigned byte;
4368 /* Strip leading sign extensions off the bignum. */
4369 while (size > 0 && bignum[size - 1] == (LITTLENUM_TYPE) -1)
4370 size--;
4374 if (loaded < 7 && size > 0)
4376 val |= (*bignum << loaded);
4377 loaded += 8 * CHARS_PER_LITTLENUM;
4378 size--;
4379 bignum++;
4382 byte = val & 0x7f;
4383 loaded -= 7;
4384 val >>= 7;
4386 if (size == 0)
4388 if ((val == 0 && (byte & 0x40) == 0)
4389 || (~(val | ~(((valueT) 1 << loaded) - 1)) == 0
4390 && (byte & 0x40) != 0))
4391 byte |= 0x80;
4394 if (orig)
4395 *p = byte;
4396 p++;
4398 while (byte & 0x80);
4400 return p - orig;
4403 static inline int
4404 output_big_uleb128 (p, bignum, size)
4405 char *p;
4406 LITTLENUM_TYPE *bignum;
4407 int size;
4409 char *orig = p;
4410 valueT val = 0;
4411 int loaded = 0;
4412 unsigned byte;
4414 /* Strip leading zeros off the bignum. */
4415 /* XXX: Is this needed? */
4416 while (size > 0 && bignum[size - 1] == 0)
4417 size--;
4421 if (loaded < 7 && size > 0)
4423 val |= (*bignum << loaded);
4424 loaded += 8 * CHARS_PER_LITTLENUM;
4425 size--;
4426 bignum++;
4429 byte = val & 0x7f;
4430 loaded -= 7;
4431 val >>= 7;
4433 if (size > 0 || val)
4434 byte |= 0x80;
4436 if (orig)
4437 *p = byte;
4438 p++;
4440 while (byte & 0x80);
4442 return p - orig;
4445 static int
4446 output_big_leb128 (p, bignum, size, sign)
4447 char *p;
4448 LITTLENUM_TYPE *bignum;
4449 int size, sign;
4451 if (sign)
4452 return output_big_sleb128 (p, bignum, size);
4453 else
4454 return output_big_uleb128 (p, bignum, size);
4457 /* Generate the appropriate fragments for a given expression to emit a
4458 leb128 value. */
4460 void
4461 emit_leb128_expr (exp, sign)
4462 expressionS *exp;
4463 int sign;
4465 operatorT op = exp->X_op;
4466 int nbytes;
4468 if (op == O_absent || op == O_illegal)
4470 as_warn (_("zero assumed for missing expression"));
4471 exp->X_add_number = 0;
4472 op = O_constant;
4474 else if (op == O_big && exp->X_add_number <= 0)
4476 as_bad (_("floating point number invalid"));
4477 exp->X_add_number = 0;
4478 op = O_constant;
4480 else if (op == O_register)
4482 as_warn (_("register value used as expression"));
4483 op = O_constant;
4486 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4487 a signal that this is leb128 data. It shouldn't optimize this away. */
4488 nbytes = -1;
4489 if (check_eh_frame (exp, &nbytes))
4490 abort ();
4492 /* Let the backend know that subsequent data may be byte aligned. */
4493 #ifdef md_cons_align
4494 md_cons_align (1);
4495 #endif
4497 if (op == O_constant)
4499 /* If we've got a constant, emit the thing directly right now. */
4501 valueT value = exp->X_add_number;
4502 int size;
4503 char *p;
4505 size = sizeof_leb128 (value, sign);
4506 p = frag_more (size);
4507 output_leb128 (p, value, sign);
4509 else if (op == O_big)
4511 /* O_big is a different sort of constant. */
4513 int size;
4514 char *p;
4516 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4517 p = frag_more (size);
4518 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4520 else
4522 /* Otherwise, we have to create a variable sized fragment and
4523 resolve things later. */
4525 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4526 make_expr_symbol (exp), 0, (char *) NULL);
4530 /* Parse the .sleb128 and .uleb128 pseudos. */
4532 void
4533 s_leb128 (sign)
4534 int sign;
4536 expressionS exp;
4540 expression (&exp);
4541 emit_leb128_expr (&exp, sign);
4543 while (*input_line_pointer++ == ',');
4545 input_line_pointer--;
4546 demand_empty_rest_of_line ();
4549 /* We read 0 or more ',' separated, double-quoted strings.
4550 Caller should have checked need_pass_2 is FALSE because we don't
4551 check it. */
4553 void
4554 stringer (append_zero) /* Worker to do .ascii etc statements. */
4555 /* Checks end-of-line. */
4556 register int append_zero; /* 0: don't append '\0', else 1. */
4558 register unsigned int c;
4559 char *start;
4561 #ifdef md_flush_pending_output
4562 md_flush_pending_output ();
4563 #endif
4565 /* The following awkward logic is to parse ZERO or more strings,
4566 comma separated. Recall a string expression includes spaces
4567 before the opening '\"' and spaces after the closing '\"'.
4568 We fake a leading ',' if there is (supposed to be)
4569 a 1st, expression. We keep demanding expressions for each ','. */
4570 if (is_it_end_of_statement ())
4572 c = 0; /* Skip loop. */
4573 ++input_line_pointer; /* Compensate for end of loop. */
4575 else
4577 c = ','; /* Do loop. */
4579 /* If we have been switched into the abs_section then we
4580 will not have an obstack onto which we can hang strings. */
4581 if (now_seg == absolute_section)
4583 as_bad (_("strings must be placed into a section"));
4584 c = 0;
4585 ignore_rest_of_line ();
4588 while (c == ',' || c == '<' || c == '"')
4590 SKIP_WHITESPACE ();
4591 switch (*input_line_pointer)
4593 case '\"':
4594 ++input_line_pointer; /*->1st char of string. */
4595 start = input_line_pointer;
4596 while (is_a_char (c = next_char_of_string ()))
4598 FRAG_APPEND_1_CHAR (c);
4600 if (append_zero)
4602 FRAG_APPEND_1_CHAR (0);
4604 know (input_line_pointer[-1] == '\"');
4606 #ifndef NO_LISTING
4607 #ifdef OBJ_ELF
4608 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4609 will emit .string with a filename in the .debug section
4610 after a sequence of constants. See the comment in
4611 emit_expr for the sequence. emit_expr will set
4612 dwarf_file_string to non-zero if this string might be a
4613 source file name. */
4614 if (strcmp (segment_name (now_seg), ".debug") != 0)
4615 dwarf_file_string = 0;
4616 else if (dwarf_file_string)
4618 c = input_line_pointer[-1];
4619 input_line_pointer[-1] = '\0';
4620 listing_source_file (start);
4621 input_line_pointer[-1] = c;
4623 #endif
4624 #endif
4626 break;
4627 case '<':
4628 input_line_pointer++;
4629 c = get_single_number ();
4630 FRAG_APPEND_1_CHAR (c);
4631 if (*input_line_pointer != '>')
4633 as_bad (_("expected <nn>"));
4635 input_line_pointer++;
4636 break;
4637 case ',':
4638 input_line_pointer++;
4639 break;
4641 SKIP_WHITESPACE ();
4642 c = *input_line_pointer;
4645 demand_empty_rest_of_line ();
4646 } /* stringer() */
4648 /* FIXME-SOMEDAY: I had trouble here on characters with the
4649 high bits set. We'll probably also have trouble with
4650 multibyte chars, wide chars, etc. Also be careful about
4651 returning values bigger than 1 byte. xoxorich. */
4653 unsigned int
4654 next_char_of_string ()
4656 register unsigned int c;
4658 c = *input_line_pointer++ & CHAR_MASK;
4659 switch (c)
4661 case '\"':
4662 c = NOT_A_CHAR;
4663 break;
4665 case '\n':
4666 as_warn (_("unterminated string; newline inserted"));
4667 bump_line_counters ();
4668 break;
4670 #ifndef NO_STRING_ESCAPES
4671 case '\\':
4672 switch (c = *input_line_pointer++)
4674 case 'b':
4675 c = '\b';
4676 break;
4678 case 'f':
4679 c = '\f';
4680 break;
4682 case 'n':
4683 c = '\n';
4684 break;
4686 case 'r':
4687 c = '\r';
4688 break;
4690 case 't':
4691 c = '\t';
4692 break;
4694 case 'v':
4695 c = '\013';
4696 break;
4698 case '\\':
4699 case '"':
4700 break; /* As itself. */
4702 case '0':
4703 case '1':
4704 case '2':
4705 case '3':
4706 case '4':
4707 case '5':
4708 case '6':
4709 case '7':
4710 case '8':
4711 case '9':
4713 long number;
4714 int i;
4716 for (i = 0, number = 0;
4717 ISDIGIT (c) && i < 3;
4718 c = *input_line_pointer++, i++)
4720 number = number * 8 + c - '0';
4723 c = number & 0xff;
4725 --input_line_pointer;
4726 break;
4728 case 'x':
4729 case 'X':
4731 long number;
4733 number = 0;
4734 c = *input_line_pointer++;
4735 while (ISXDIGIT (c))
4737 if (ISDIGIT (c))
4738 number = number * 16 + c - '0';
4739 else if (ISUPPER (c))
4740 number = number * 16 + c - 'A' + 10;
4741 else
4742 number = number * 16 + c - 'a' + 10;
4743 c = *input_line_pointer++;
4745 c = number & 0xff;
4746 --input_line_pointer;
4748 break;
4750 case '\n':
4751 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4752 as_warn (_("unterminated string; newline inserted"));
4753 c = '\n';
4754 bump_line_counters ();
4755 break;
4757 default:
4759 #ifdef ONLY_STANDARD_ESCAPES
4760 as_bad (_("bad escaped character in string"));
4761 c = '?';
4762 #endif /* ONLY_STANDARD_ESCAPES */
4764 break;
4766 break;
4767 #endif /* ! defined (NO_STRING_ESCAPES) */
4769 default:
4770 break;
4772 return (c);
4775 static segT
4776 get_segmented_expression (expP)
4777 register expressionS *expP;
4779 register segT retval;
4781 retval = expression (expP);
4782 if (expP->X_op == O_illegal
4783 || expP->X_op == O_absent
4784 || expP->X_op == O_big)
4786 as_bad (_("expected address expression"));
4787 expP->X_op = O_constant;
4788 expP->X_add_number = 0;
4789 retval = absolute_section;
4791 return retval;
4794 static segT
4795 get_known_segmented_expression (expP)
4796 register expressionS *expP;
4798 register segT retval;
4800 if ((retval = get_segmented_expression (expP)) == undefined_section)
4802 /* There is no easy way to extract the undefined symbol from the
4803 expression. */
4804 if (expP->X_add_symbol != NULL
4805 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4806 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4807 S_GET_NAME (expP->X_add_symbol));
4808 else
4809 as_warn (_("some symbol undefined; zero assumed"));
4810 retval = absolute_section;
4811 expP->X_op = O_constant;
4812 expP->X_add_number = 0;
4814 know (retval == absolute_section || SEG_NORMAL (retval));
4815 return (retval);
4818 offsetT
4819 get_absolute_expr (exp)
4820 expressionS *exp;
4822 expression (exp);
4823 if (exp->X_op != O_constant)
4825 if (exp->X_op != O_absent)
4826 as_bad (_("bad or irreducible absolute expression"));
4827 exp->X_add_number = 0;
4829 return exp->X_add_number;
4832 offsetT
4833 get_absolute_expression ()
4835 expressionS exp;
4837 return get_absolute_expr (&exp);
4840 char /* Return terminator. */
4841 get_absolute_expression_and_terminator (val_pointer)
4842 long *val_pointer; /* Return value of expression. */
4844 /* FIXME: val_pointer should probably be offsetT *. */
4845 *val_pointer = (long) get_absolute_expression ();
4846 return (*input_line_pointer++);
4849 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4850 Give a warning if that happens. */
4852 char *
4853 demand_copy_C_string (len_pointer)
4854 int *len_pointer;
4856 register char *s;
4858 if ((s = demand_copy_string (len_pointer)) != 0)
4860 register int len;
4862 for (len = *len_pointer; len > 0; len--)
4864 if (*s == 0)
4866 s = 0;
4867 len = 1;
4868 *len_pointer = 0;
4869 as_bad (_("this string may not contain \'\\0\'"));
4874 return s;
4877 /* Demand string, but return a safe (=private) copy of the string.
4878 Return NULL if we can't read a string here. */
4880 char *
4881 demand_copy_string (lenP)
4882 int *lenP;
4884 register unsigned int c;
4885 register int len;
4886 char *retval;
4888 len = 0;
4889 SKIP_WHITESPACE ();
4890 if (*input_line_pointer == '\"')
4892 input_line_pointer++; /* Skip opening quote. */
4894 while (is_a_char (c = next_char_of_string ()))
4896 obstack_1grow (&notes, c);
4897 len++;
4899 /* JF this next line is so demand_copy_C_string will return a
4900 null terminated string. */
4901 obstack_1grow (&notes, '\0');
4902 retval = obstack_finish (&notes);
4904 else
4906 as_warn (_("missing string"));
4907 retval = NULL;
4908 ignore_rest_of_line ();
4910 *lenP = len;
4911 return (retval);
4914 /* In: Input_line_pointer->next character.
4916 Do: Skip input_line_pointer over all whitespace.
4918 Out: 1 if input_line_pointer->end-of-line. */
4921 is_it_end_of_statement ()
4923 SKIP_WHITESPACE ();
4924 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4927 void
4928 equals (sym_name, reassign)
4929 char *sym_name;
4930 int reassign;
4932 register symbolS *symbolP; /* Symbol we are working with. */
4933 char *stop = NULL;
4934 char stopc;
4936 input_line_pointer++;
4937 if (*input_line_pointer == '=')
4938 input_line_pointer++;
4940 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4941 input_line_pointer++;
4943 if (flag_mri)
4944 stop = mri_comment_field (&stopc);
4946 if (sym_name[0] == '.' && sym_name[1] == '\0')
4948 /* Turn '. = mumble' into a .org mumble. */
4949 register segT segment;
4950 expressionS exp;
4952 segment = get_known_segmented_expression (&exp);
4953 if (!need_pass_2)
4954 do_org (segment, &exp, 0);
4956 else
4958 #ifdef OBJ_COFF
4959 int local;
4961 symbolP = symbol_find (sym_name);
4962 local = symbolP == NULL;
4963 if (local)
4964 #endif /* OBJ_COFF */
4965 symbolP = symbol_find_or_make (sym_name);
4966 /* Permit register names to be redefined. */
4967 if (!reassign
4968 && S_IS_DEFINED (symbolP)
4969 && S_GET_SEGMENT (symbolP) != reg_section)
4970 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP));
4972 #ifdef OBJ_COFF
4973 /* "set" symbols are local unless otherwise specified. */
4974 if (local)
4975 SF_SET_LOCAL (symbolP);
4976 #endif /* OBJ_COFF */
4978 pseudo_set (symbolP);
4981 if (flag_mri)
4983 /* Check garbage after the expression. */
4984 ignore_rest_of_line ();
4985 mri_comment_end (stop, stopc);
4989 /* .incbin -- include a file verbatim at the current location. */
4991 void
4992 s_incbin (x)
4993 int x ATTRIBUTE_UNUSED;
4995 FILE * binfile;
4996 char * path;
4997 char * filename;
4998 char * binfrag;
4999 long skip = 0;
5000 long count = 0;
5001 long bytes;
5002 int len;
5004 #ifdef md_flush_pending_output
5005 md_flush_pending_output ();
5006 #endif
5008 SKIP_WHITESPACE ();
5009 filename = demand_copy_string (& len);
5010 if (filename == NULL)
5011 return;
5013 SKIP_WHITESPACE ();
5015 /* Look for optional skip and count. */
5016 if (* input_line_pointer == ',')
5018 ++ input_line_pointer;
5019 skip = get_absolute_expression ();
5021 SKIP_WHITESPACE ();
5023 if (* input_line_pointer == ',')
5025 ++ input_line_pointer;
5027 count = get_absolute_expression ();
5028 if (count == 0)
5029 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5031 SKIP_WHITESPACE ();
5035 demand_empty_rest_of_line ();
5037 /* Try opening absolute path first, then try include dirs. */
5038 binfile = fopen (filename, FOPEN_RB);
5039 if (binfile == NULL)
5041 int i;
5043 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5045 for (i = 0; i < include_dir_count; i++)
5047 sprintf (path, "%s/%s", include_dirs[i], filename);
5049 binfile = fopen (path, FOPEN_RB);
5050 if (binfile != NULL)
5051 break;
5054 if (binfile == NULL)
5055 as_bad (_("file not found: %s"), filename);
5057 else
5058 path = xstrdup (filename);
5060 if (binfile)
5062 long file_len;
5064 register_dependency (path);
5066 /* Compute the length of the file. */
5067 if (fseek (binfile, 0, SEEK_END) != 0)
5069 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5070 goto done;
5072 file_len = ftell (binfile);
5074 /* If a count was not specified use the size of the file. */
5075 if (count == 0)
5076 count = file_len;
5078 if (skip + count > file_len)
5080 as_bad (_("skip (%ld) + count (%ld) larger than file size (%ld)"),
5081 skip, count, file_len);
5082 goto done;
5085 if (fseek (binfile, skip, SEEK_SET) != 0)
5087 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5088 goto done;
5091 /* Allocate frag space and store file contents in it. */
5092 binfrag = frag_more (count);
5094 bytes = fread (binfrag, 1, count, binfile);
5095 if (bytes < count)
5096 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5097 path, bytes, count);
5099 done:
5100 if (binfile != NULL)
5101 fclose (binfile);
5102 if (path)
5103 free (path);
5106 /* .include -- include a file at this point. */
5108 void
5109 s_include (arg)
5110 int arg ATTRIBUTE_UNUSED;
5112 char *filename;
5113 int i;
5114 FILE *try;
5115 char *path;
5117 if (!flag_m68k_mri)
5119 filename = demand_copy_string (&i);
5120 if (filename == NULL)
5122 /* demand_copy_string has already printed an error and
5123 called ignore_rest_of_line. */
5124 return;
5127 else
5129 SKIP_WHITESPACE ();
5130 i = 0;
5131 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5132 && *input_line_pointer != ' '
5133 && *input_line_pointer != '\t')
5135 obstack_1grow (&notes, *input_line_pointer);
5136 ++input_line_pointer;
5137 ++i;
5140 obstack_1grow (&notes, '\0');
5141 filename = obstack_finish (&notes);
5142 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5143 ++input_line_pointer;
5146 demand_empty_rest_of_line ();
5147 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5149 for (i = 0; i < include_dir_count; i++)
5151 strcpy (path, include_dirs[i]);
5152 strcat (path, "/");
5153 strcat (path, filename);
5154 if (0 != (try = fopen (path, FOPEN_RT)))
5156 fclose (try);
5157 goto gotit;
5161 free (path);
5162 path = filename;
5163 gotit:
5164 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5165 register_dependency (path);
5166 input_scrub_insert_file (path);
5169 void
5170 add_include_dir (path)
5171 char *path;
5173 int i;
5175 if (include_dir_count == 0)
5177 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5178 include_dirs[0] = "."; /* Current dir. */
5179 include_dir_count = 2;
5181 else
5183 include_dir_count++;
5184 include_dirs =
5185 (char **) realloc (include_dirs,
5186 include_dir_count * sizeof (*include_dirs));
5189 include_dirs[include_dir_count - 1] = path; /* New one. */
5191 i = strlen (path);
5192 if (i > include_dir_maxlen)
5193 include_dir_maxlen = i;
5196 /* Output debugging information to denote the source file. */
5198 static void
5199 generate_file_debug ()
5201 if (debug_type == DEBUG_STABS)
5202 stabs_generate_asm_file ();
5205 /* Output line number debugging information for the current source line. */
5207 void
5208 generate_lineno_debug ()
5210 switch (debug_type)
5212 case DEBUG_UNSPECIFIED:
5213 case DEBUG_NONE:
5214 case DEBUG_DWARF:
5215 break;
5216 case DEBUG_STABS:
5217 stabs_generate_asm_lineno ();
5218 break;
5219 case DEBUG_ECOFF:
5220 ecoff_generate_asm_lineno ();
5221 break;
5222 case DEBUG_DWARF2:
5223 /* ??? We could here indicate to dwarf2dbg.c that something
5224 has changed. However, since there is additional backend
5225 support that is required (calling dwarf2_emit_insn), we
5226 let dwarf2dbg.c call as_where on its own. */
5227 break;
5231 /* Output debugging information to mark a function entry point or end point.
5232 END_P is zero for .func, and non-zero for .endfunc. */
5234 void
5235 s_func (end_p)
5236 int end_p;
5238 do_s_func (end_p, NULL);
5241 /* Subroutine of s_func so targets can choose a different default prefix.
5242 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5244 void
5245 do_s_func (end_p, default_prefix)
5246 int end_p;
5247 const char *default_prefix;
5249 /* Record the current function so that we can issue an error message for
5250 misplaced .func,.endfunc, and also so that .endfunc needs no
5251 arguments. */
5252 static char *current_name;
5253 static char *current_label;
5255 if (end_p)
5257 if (current_name == NULL)
5259 as_bad (_("missing .func"));
5260 ignore_rest_of_line ();
5261 return;
5264 if (debug_type == DEBUG_STABS)
5265 stabs_generate_asm_endfunc (current_name, current_label);
5267 current_name = current_label = NULL;
5269 else /* ! end_p */
5271 char *name, *label;
5272 char delim1, delim2;
5274 if (current_name != NULL)
5276 as_bad (_(".endfunc missing for previous .func"));
5277 ignore_rest_of_line ();
5278 return;
5281 name = input_line_pointer;
5282 delim1 = get_symbol_end ();
5283 name = xstrdup (name);
5284 *input_line_pointer = delim1;
5285 SKIP_WHITESPACE ();
5286 if (*input_line_pointer != ',')
5288 if (default_prefix)
5289 asprintf (&label, "%s%s", default_prefix, name);
5290 else
5292 char leading_char = 0;
5293 #ifdef BFD_ASSEMBLER
5294 leading_char = bfd_get_symbol_leading_char (stdoutput);
5295 #endif
5296 /* Missing entry point, use function's name with the leading
5297 char prepended. */
5298 if (leading_char)
5299 asprintf (&label, "%c%s", leading_char, name);
5300 else
5301 label = name;
5304 else
5306 ++input_line_pointer;
5307 SKIP_WHITESPACE ();
5308 label = input_line_pointer;
5309 delim2 = get_symbol_end ();
5310 label = xstrdup (label);
5311 *input_line_pointer = delim2;
5314 if (debug_type == DEBUG_STABS)
5315 stabs_generate_asm_func (name, label);
5317 current_name = name;
5318 current_label = label;
5321 demand_empty_rest_of_line ();
5324 void
5325 s_ignore (arg)
5326 int arg ATTRIBUTE_UNUSED;
5328 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5330 ++input_line_pointer;
5332 ++input_line_pointer;
5335 void
5336 read_print_statistics (file)
5337 FILE *file;
5339 hash_print_statistics (file, "pseudo-op table", po_hash);
5342 /* Inserts the given line into the input stream.
5344 This call avoids macro/conditionals nesting checking, since the contents of
5345 the line are assumed to replace the contents of a line already scanned.
5347 An appropriate use of this function would be substition of input lines when
5348 called by md_start_line_hook(). The given line is assumed to already be
5349 properly scrubbed. */
5351 void
5352 input_scrub_insert_line (line)
5353 const char *line;
5355 sb newline;
5356 sb_new (&newline);
5357 sb_add_string (&newline, line);
5358 input_scrub_include_sb (&newline, input_line_pointer, 0);
5359 sb_kill (&newline);
5360 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5363 /* Insert a file into the input stream; the path must resolve to an actual
5364 file; no include path searching or dependency registering is performed. */
5366 void
5367 input_scrub_insert_file (path)
5368 char *path;
5370 input_scrub_include_file (path, input_line_pointer);
5371 buffer_limit = input_scrub_next_buffer (&input_line_pointer);