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* bfin-dis.c (print_insn_bfin): Do proper endian transform when
[deliverable/binutils-gdb.git] / gas / read.c
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252b5132 1/* read.c - read a source file -
f7e42eb4 2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
e5604d79
RS		 3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
252b5132
RH		 5
6This file is part of GAS, the GNU Assembler.
7
8GAS is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GAS is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GAS; see the file COPYING. If not, write to the Free
4b4da160
NC		 20Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
2102110-1301, USA. */
252b5132 22
59c871b4 23/* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
041ff4dd
NC		 24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
041ff4dd 26#define MASK_CHAR ((int)(unsigned char) -1)
252b5132 27
252b5132 28/* This is the largest known floating point format (for now). It will
041ff4dd 29 grow when we do 4361 style flonums. */
252b5132
RH		 30#define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
31
47eebc20 32/* Routines that read assembler source text to build spaghetti in memory.
252b5132
RH		 33 Another group of these functions is in the expr.c module. */
34
252b5132 35#include "as.h"
3882b010 36#include "safe-ctype.h"
252b5132
RH		 37#include "subsegs.h"
38#include "sb.h"
39#include "macro.h"
40#include "obstack.h"
41#include "listing.h"
42#include "ecoff.h"
54cfded0 43#include "dw2gencfi.h"
252b5132
RH		 44
45#ifndef TC_START_LABEL
d1a6c242 46#define TC_START_LABEL(x,y) (x == ':')
252b5132
RH		 47#endif
48
8684e216
HPN		 49/* Set by the object-format or the target. */
50#ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
d6415f6c 51#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
041ff4dd 52 do \
d6415f6c
AM		 53 { \
54 if ((SIZE) >= 8) \
55 (P2VAR) = 3; \
56 else if ((SIZE) >= 4) \
57 (P2VAR) = 2; \
58 else if ((SIZE) >= 2) \
59 (P2VAR) = 1; \
60 else \
61 (P2VAR) = 0; \
041ff4dd
NC		 62 } \
63 while (0)
8684e216
HPN		 64#endif
65
041ff4dd 66char *input_line_pointer; /*->next char of source file to parse. */
252b5132
RH		 67
68#if BITS_PER_CHAR != 8
69/* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
71die horribly;
72#endif
73
74#ifndef LEX_AT
252b5132
RH		 75#define LEX_AT 0
76#endif
77
78#ifndef LEX_BR
79/* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
80#define LEX_BR 0
81#endif
82
83#ifndef LEX_PCT
84/* The Delta 68k assembler permits % inside label names. */
85#define LEX_PCT 0
86#endif
87
88#ifndef LEX_QM
89/* The PowerPC Windows NT assemblers permits ? inside label names. */
90#define LEX_QM 0
91#endif
92
58b5739a 93#ifndef LEX_HASH
800eeca4
JW		 94/* The IA-64 assembler uses # as a suffix designating a symbol. We include
95 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
58b5739a
RH		 96#define LEX_HASH 0
97#endif
98
252b5132 99#ifndef LEX_DOLLAR
252b5132
RH		 100#define LEX_DOLLAR 3
101#endif
102
103#ifndef LEX_TILDE
104/* The Delta 68k assembler permits ~ at start of label names. */
105#define LEX_TILDE 0
106#endif
107
041ff4dd 108/* Used by is_... macros. our ctype[]. */
ef99799a 109char lex_type[256] = {
252b5132
RH		 110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
58b5739a 112 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
252b5132
RH		 113 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
114 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
116 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
041ff4dd 117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
252b5132
RH		 118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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};
127
041ff4dd
NC		 128/* In: a character.
129 Out: 1 if this character ends a line. */
ef99799a 130char is_end_of_line[256] = {
252b5132 131#ifdef CR_EOL
b75c0c92 132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
252b5132 133#else
b75c0c92 134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
252b5132 135#endif
b75c0c92
AM		 136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
ac743b2c 138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
b75c0c92
AM		 139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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, /* */
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, /* */
0b545448
AM		 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 /* */
252b5132 151};
252b5132 152
a8a3b3b2 153#ifndef TC_CASE_SENSITIVE
37d8bb27
NC		 154char original_case_string[128];
155#endif
156
041ff4dd 157/* Functions private to this file. */
252b5132 158
041ff4dd
NC		 159static char *buffer; /* 1st char of each buffer of lines is here. */
160static char *buffer_limit; /*->1 + last char in buffer. */
252b5132 161
041ff4dd
NC		 162/* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 internals manual. */
252b5132
RH		 165int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166
041ff4dd 167/* Variables for handling include file directory table. */
252b5132 168
041ff4dd
NC		 169/* Table of pointers to directories to search for .include's. */
170char **include_dirs;
171
172/* How many are in the table. */
173int include_dir_count;
174
175/* Length of longest in table. */
176int include_dir_maxlen = 1;
252b5132
RH		 177
178#ifndef WORKING_DOT_WORD
179struct broken_word *broken_words;
180int new_broken_words;
181#endif
182
183/* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186addressT abs_section_offset;
187
188/* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
190symbolS *line_label;
191
192/* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195symbolS *mri_common_symbol;
196
197/* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 may be needed. */
201static int mri_pending_align;
202
203#ifndef NO_LISTING
204#ifdef OBJ_ELF
205/* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208static int dwarf_file_string;
209#endif
210#endif
211
87c245cc 212static void do_s_func (int end_p, const char *default_prefix);
39e6acbd
KH		 213static void do_align (int, char *, int, int);
214static void s_align (int, int);
caa32fe5 215static void s_altmacro (int);
057f53c1 216static void s_bad_end (int);
39e6acbd 217static int hex_float (int, char *);
39e6acbd
KH		 218static segT get_known_segmented_expression (expressionS * expP);
219static void pobegin (void);
220static int get_line_sb (sb *);
221static void generate_file_debug (void);
40a4d956 222static char *_find_end_of_line (char *, int, int);
252b5132 223\f
252b5132 224void
39e6acbd 225read_begin (void)
252b5132
RH		 226{
227 const char *p;
228
229 pobegin ();
230 obj_read_begin_hook ();
231
232 /* Something close -- but not too close -- to a multiple of 1024.
233 The debugging malloc I'm using has 24 bytes of overhead. */
234 obstack_begin (&notes, chunksize);
235 obstack_begin (&cond_obstack, chunksize);
236
041ff4dd 237 /* Use machine dependent syntax. */
252b5132
RH		 238 for (p = line_separator_chars; *p; p++)
239 is_end_of_line[(unsigned char) *p] = 1;
041ff4dd 240 /* Use more. FIXME-SOMEDAY. */
252b5132
RH		 241
242 if (flag_mri)
243 lex_type['?'] = 3;
244}
245\f
cc1bc22a 246#ifndef TC_ADDRESS_BYTES
cc1bc22a
AM		 247#define TC_ADDRESS_BYTES address_bytes
248
249static inline int
250address_bytes (void)
251{
252 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
253 contain an address. */
254 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
255 n |= n >> 1;
256 n |= n >> 2;
257 n += 1;
258 return n;
259}
260#endif
cc1bc22a 261
041ff4dd 262/* Set up pseudo-op tables. */
252b5132
RH		 263
264static struct hash_control *po_hash;
265
ef99799a 266static const pseudo_typeS potable[] = {
252b5132
RH		 267 {"abort", s_abort, 0},
268 {"align", s_align_ptwo, 0},
caa32fe5 269 {"altmacro", s_altmacro, 1},
252b5132
RH		 270 {"ascii", stringer, 0},
271 {"asciz", stringer, 1},
272 {"balign", s_align_bytes, 0},
273 {"balignw", s_align_bytes, -2},
274 {"balignl", s_align_bytes, -4},
041ff4dd 275/* block */
252b5132
RH		 276 {"byte", cons, 1},
277 {"comm", s_comm, 0},
278 {"common", s_mri_common, 0},
279 {"common.s", s_mri_common, 1},
280 {"data", s_data, 0},
281 {"dc", cons, 2},
cc1bc22a
AM		 282#ifdef TC_ADDRESS_BYTES
283 {"dc.a", cons, 0},
284#endif
252b5132
RH		 285 {"dc.b", cons, 1},
286 {"dc.d", float_cons, 'd'},
287 {"dc.l", cons, 4},
288 {"dc.s", float_cons, 'f'},
289 {"dc.w", cons, 2},
290 {"dc.x", float_cons, 'x'},
291 {"dcb", s_space, 2},
292 {"dcb.b", s_space, 1},
293 {"dcb.d", s_float_space, 'd'},
294 {"dcb.l", s_space, 4},
295 {"dcb.s", s_float_space, 'f'},
296 {"dcb.w", s_space, 2},
297 {"dcb.x", s_float_space, 'x'},
298 {"ds", s_space, 2},
299 {"ds.b", s_space, 1},
300 {"ds.d", s_space, 8},
301 {"ds.l", s_space, 4},
302 {"ds.p", s_space, 12},
303 {"ds.s", s_space, 4},
304 {"ds.w", s_space, 2},
305 {"ds.x", s_space, 12},
306 {"debug", s_ignore, 0},
307#ifdef S_SET_DESC
308 {"desc", s_desc, 0},
309#endif
041ff4dd 310/* dim */
252b5132 311 {"double", float_cons, 'd'},
041ff4dd
NC		 312/* dsect */
313 {"eject", listing_eject, 0}, /* Formfeed listing. */
252b5132
RH		 314 {"else", s_else, 0},
315 {"elsec", s_else, 0},
3fd9f047 316 {"elseif", s_elseif, (int) O_ne},
252b5132
RH		 317 {"end", s_end, 0},
318 {"endc", s_endif, 0},
319 {"endfunc", s_func, 1},
320 {"endif", s_endif, 0},
057f53c1
JB		 321 {"endm", s_bad_end, 0},
322 {"endr", s_bad_end, 1},
041ff4dd 323/* endef */
252b5132
RH		 324 {"equ", s_set, 0},
325 {"equiv", s_set, 1},
9497f5ac 326 {"eqv", s_set, -1},
252b5132 327 {"err", s_err, 0},
d190d046 328 {"error", s_errwarn, 1},
252b5132 329 {"exitm", s_mexit, 0},
041ff4dd
NC		 330/* extend */
331 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
252b5132
RH		 332 {"appfile", s_app_file, 1},
333 {"appline", s_app_line, 0},
334 {"fail", s_fail, 0},
335 {"file", s_app_file, 0},
336 {"fill", s_fill, 0},
337 {"float", float_cons, 'f'},
338 {"format", s_ignore, 0},
339 {"func", s_func, 0},
340 {"global", s_globl, 0},
341 {"globl", s_globl, 0},
342 {"hword", cons, 2},
343 {"if", s_if, (int) O_ne},
26aca5f6 344 {"ifb", s_ifb, 1},
252b5132
RH		 345 {"ifc", s_ifc, 0},
346 {"ifdef", s_ifdef, 0},
347 {"ifeq", s_if, (int) O_eq},
348 {"ifeqs", s_ifeqs, 0},
349 {"ifge", s_if, (int) O_ge},
350 {"ifgt", s_if, (int) O_gt},
351 {"ifle", s_if, (int) O_le},
352 {"iflt", s_if, (int) O_lt},
26aca5f6 353 {"ifnb", s_ifb, 0},
252b5132
RH		 354 {"ifnc", s_ifc, 1},
355 {"ifndef", s_ifdef, 1},
356 {"ifne", s_if, (int) O_ne},
357 {"ifnes", s_ifeqs, 1},
358 {"ifnotdef", s_ifdef, 1},
7e005732 359 {"incbin", s_incbin, 0},
252b5132
RH		 360 {"include", s_include, 0},
361 {"int", cons, 4},
362 {"irp", s_irp, 0},
363 {"irep", s_irp, 0},
364 {"irpc", s_irp, 1},
365 {"irepc", s_irp, 1},
366 {"lcomm", s_lcomm, 0},
041ff4dd 367 {"lflags", listing_flags, 0}, /* Listing flags. */
252b5132 368 {"linkonce", s_linkonce, 0},
041ff4dd 369 {"list", listing_list, 1}, /* Turn listing on. */
252b5132
RH		 370 {"llen", listing_psize, 1},
371 {"long", cons, 4},
372 {"lsym", s_lsym, 0},
373 {"macro", s_macro, 0},
374 {"mexit", s_mexit, 0},
375 {"mri", s_mri, 0},
376 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
377 {"name", s_ignore, 0},
caa32fe5 378 {"noaltmacro", s_altmacro, 0},
252b5132 379 {"noformat", s_ignore, 0},
041ff4dd 380 {"nolist", listing_list, 0}, /* Turn listing off. */
252b5132
RH		 381 {"nopage", listing_nopage, 0},
382 {"octa", cons, 16},
383 {"offset", s_struct, 0},
384 {"org", s_org, 0},
385 {"p2align", s_align_ptwo, 0},
386 {"p2alignw", s_align_ptwo, -2},
387 {"p2alignl", s_align_ptwo, -4},
388 {"page", listing_eject, 0},
389 {"plen", listing_psize, 0},
390 {"print", s_print, 0},
041ff4dd 391 {"psize", listing_psize, 0}, /* Set paper size. */
252b5132
RH		 392 {"purgem", s_purgem, 0},
393 {"quad", cons, 8},
394 {"rep", s_rept, 0},
395 {"rept", s_rept, 0},
396 {"rva", s_rva, 4},
041ff4dd
NC		 397 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
398/* scl */
399/* sect */
252b5132
RH		 400 {"set", s_set, 0},
401 {"short", cons, 2},
402 {"single", float_cons, 'f'},
041ff4dd 403/* size */
252b5132
RH		 404 {"space", s_space, 0},
405 {"skip", s_space, 0},
406 {"sleb128", s_leb128, 1},
407 {"spc", s_ignore, 0},
408 {"stabd", s_stab, 'd'},
409 {"stabn", s_stab, 'n'},
410 {"stabs", s_stab, 's'},
411 {"string", stringer, 1},
412 {"struct", s_struct, 0},
041ff4dd 413/* tag */
252b5132
RH		 414 {"text", s_text, 0},
415
416 /* This is for gcc to use. It's only just been added (2/94), so gcc
417 won't be able to use it for a while -- probably a year or more.
418 But once this has been released, check with gcc maintainers
419 before deleting it or even changing the spelling. */
420 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
421 /* If we're folding case -- done for some targets, not necessarily
422 all -- the above string in an input file will be converted to
423 this one. Match it either way... */
424 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
425
041ff4dd 426 {"title", listing_title, 0}, /* Listing title. */
252b5132 427 {"ttl", listing_title, 0},
041ff4dd 428/* type */
252b5132 429 {"uleb128", s_leb128, 0},
041ff4dd
NC		 430/* use */
431/* val */
252b5132
RH		 432 {"xcom", s_comm, 0},
433 {"xdef", s_globl, 0},
434 {"xref", s_ignore, 0},
435 {"xstabs", s_xstab, 's'},
d190d046 436 {"warning", s_errwarn, 0},
252b5132
RH		 437 {"word", cons, 2},
438 {"zero", s_space, 0},
041ff4dd 439 {NULL, NULL, 0} /* End sentinel. */
252b5132
RH		 440};
441
87c245cc
BE		 442static offsetT
443get_absolute_expr (expressionS *exp)
444{
9497f5ac 445 expression_and_evaluate (exp);
87c245cc
BE		 446 if (exp->X_op != O_constant)
447 {
448 if (exp->X_op != O_absent)
449 as_bad (_("bad or irreducible absolute expression"));
450 exp->X_add_number = 0;
451 }
452 return exp->X_add_number;
453}
454
455offsetT
456get_absolute_expression (void)
457{
458 expressionS exp;
459
460 return get_absolute_expr (&exp);
461}
462
252b5132
RH		 463static int pop_override_ok = 0;
464static const char *pop_table_name;
465
466void
39e6acbd 467pop_insert (const pseudo_typeS *table)
252b5132
RH		 468{
469 const char *errtxt;
470 const pseudo_typeS *pop;
471 for (pop = table; pop->poc_name; pop++)
472 {
473 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
474 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
475 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
476 errtxt);
477 }
478}
479
480#ifndef md_pop_insert
481#define md_pop_insert() pop_insert(md_pseudo_table)
482#endif
483
484#ifndef obj_pop_insert
485#define obj_pop_insert() pop_insert(obj_pseudo_table)
486#endif
487
54cfded0
AM		 488#ifndef cfi_pop_insert
489#define cfi_pop_insert() pop_insert(cfi_pseudo_table)
490#endif
491
041ff4dd 492static void
39e6acbd 493pobegin (void)
252b5132
RH		 494{
495 po_hash = hash_new ();
496
041ff4dd 497 /* Do the target-specific pseudo ops. */
252b5132
RH		 498 pop_table_name = "md";
499 md_pop_insert ();
500
041ff4dd 501 /* Now object specific. Skip any that were in the target table. */
252b5132
RH		 502 pop_table_name = "obj";
503 pop_override_ok = 1;
504 obj_pop_insert ();
505
041ff4dd 506 /* Now portable ones. Skip any that we've seen already. */
252b5132
RH		 507 pop_table_name = "standard";
508 pop_insert (potable);
d6415f6c 509
54cfded0
AM		 510#ifdef TARGET_USE_CFIPOP
511 pop_table_name = "cfi";
512 pop_override_ok = 1;
513 cfi_pop_insert ();
514#endif
252b5132
RH		 515}
516\f
517#define HANDLE_CONDITIONAL_ASSEMBLY() \
518 if (ignore_input ()) \
519 { \
40a4d956
JB		 520 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
521 input_line_pointer = (input_line_pointer <= buffer_limit \
522 && eol >= buffer_limit) \
523 ? buffer_limit \
524 : eol + 1; \
252b5132
RH		 525 continue; \
526 }
527
252b5132
RH		 528/* This function is used when scrubbing the characters between #APP
529 and #NO_APP. */
530
531static char *scrub_string;
532static char *scrub_string_end;
533
534static int
39e6acbd 535scrub_from_string (char *buf, int buflen)
252b5132 536{
2b47531b
ILT		 537 int copy;
538
539 copy = scrub_string_end - scrub_string;
540 if (copy > buflen)
541 copy = buflen;
542 memcpy (buf, scrub_string, copy);
543 scrub_string += copy;
544 return copy;
252b5132
RH		 545}
546
5e75c3ab
JB		 547/* Helper function of read_a_source_file, which tries to expand a macro. */
548static int
549try_macro (char term, const char *line)
550{
551 sb out;
552 const char *err;
553 macro_entry *macro;
554
555 if (check_macro (line, &out, &err, &macro))
556 {
557 if (err != NULL)
558 as_bad ("%s", err);
559 *input_line_pointer++ = term;
560 input_scrub_include_sb (&out,
561 input_line_pointer, 1);
562 sb_kill (&out);
563 buffer_limit =
564 input_scrub_next_buffer (&input_line_pointer);
565#ifdef md_macro_info
566 md_macro_info (macro);
567#endif
568 return 1;
569 }
570 return 0;
571}
572
041ff4dd
NC		 573/* We read the file, putting things into a web that represents what we
574 have been reading. */
575void
39e6acbd 576read_a_source_file (char *name)
252b5132
RH		 577{
578 register char c;
041ff4dd 579 register char *s; /* String of symbol, '\0' appended. */
252b5132
RH		 580 register int temp;
581 pseudo_typeS *pop;
582
4c400d5e
AM		 583#ifdef WARN_COMMENTS
584 found_comment = 0;
585#endif
586
252b5132
RH		 587 buffer = input_scrub_new_file (name);
588
589 listing_file (name);
590 listing_newline (NULL);
591 register_dependency (name);
592
593 /* Generate debugging information before we've read anything in to denote
594 this file as the "main" source file and not a subordinate one
595 (e.g. N_SO vs N_SOL in stabs). */
596 generate_file_debug ();
597
598 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
041ff4dd 599 { /* We have another line to parse. */
5e75c3ab
JB		 600#ifndef NO_LISTING
601 /* In order to avoid listing macro expansion lines with labels
602 multiple times, keep track of which line was last issued. */
603 static char *last_eol;
604
605 last_eol = NULL;
606#endif
041ff4dd 607 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
64e55042 608
252b5132
RH		 609 while (input_line_pointer < buffer_limit)
610 {
041ff4dd 611 /* We have more of this buffer to parse. */
252b5132 612
041ff4dd
NC		 613 /* We now have input_line_pointer->1st char of next line.
614 If input_line_pointer [-1] == '\n' then we just
615 scanned another line: so bump line counters. */
252b5132
RH		 616 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
617 {
618#ifdef md_start_line_hook
619 md_start_line_hook ();
620#endif
252b5132
RH		 621 if (input_line_pointer[-1] == '\n')
622 bump_line_counters ();
623
624 line_label = NULL;
625
abd63a32 626 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
252b5132
RH		 627 {
628 /* Text at the start of a line must be a label, we
629 run down and stick a colon in. */
630 if (is_name_beginner (*input_line_pointer))
631 {
632 char *line_start = input_line_pointer;
633 char c;
634 int mri_line_macro;
635
636 LISTING_NEWLINE ();
637 HANDLE_CONDITIONAL_ASSEMBLY ();
638
639 c = get_symbol_end ();
640
641 /* In MRI mode, the EQU and MACRO pseudoops must
642 be handled specially. */
643 mri_line_macro = 0;
644 if (flag_m68k_mri)
645 {
646 char *rest = input_line_pointer + 1;
647
648 if (*rest == ':')
649 ++rest;
650 if (*rest == ' ' || *rest == '\t')
651 ++rest;
652 if ((strncasecmp (rest, "EQU", 3) == 0
653 || strncasecmp (rest, "SET", 3) == 0)
654 && (rest[3] == ' ' || rest[3] == '\t'))
655 {
656 input_line_pointer = rest + 3;
657 equals (line_start,
658 strncasecmp (rest, "SET", 3) == 0);
659 continue;
660 }
661 if (strncasecmp (rest, "MACRO", 5) == 0
662 && (rest[5] == ' '
663 || rest[5] == '\t'
664 || is_end_of_line[(unsigned char) rest[5]]))
665 mri_line_macro = 1;
666 }
667
668 /* In MRI mode, we need to handle the MACRO
d6415f6c
AM		 669 pseudo-op specially: we don't want to put the
670 symbol in the symbol table. */
041ff4dd 671 if (!mri_line_macro
a25c045a 672#ifdef TC_START_LABEL_WITHOUT_COLON
ef99799a
KH		 673 && TC_START_LABEL_WITHOUT_COLON(c,
674 input_line_pointer)
a25c045a 675#endif
ef99799a 676 )
252b5132
RH		 677 line_label = colon (line_start);
678 else
679 line_label = symbol_create (line_start,
680 absolute_section,
681 (valueT) 0,
682 &zero_address_frag);
683
684 *input_line_pointer = c;
685 if (c == ':')
686 input_line_pointer++;
687 }
688 }
689 }
690
47eebc20 691 /* We are at the beginning of a line, or similar place.
041ff4dd
NC		 692 We expect a well-formed assembler statement.
693 A "symbol-name:" is a statement.
f0e652b4 694
041ff4dd
NC		 695 Depending on what compiler is used, the order of these tests
696 may vary to catch most common case 1st.
697 Each test is independent of all other tests at the (top) level.
698 PLEASE make a compiler that doesn't use this assembler.
699 It is crufty to waste a compiler's time encoding things for this
700 assembler, which then wastes more time decoding it.
701 (And communicating via (linear) files is silly!
702 If you must pass stuff, please pass a tree!) */
252b5132
RH		 703 if ((c = *input_line_pointer++) == '\t'
704 || c == ' '
705 || c == '\f'
706 || c == 0)
041ff4dd
NC		 707 c = *input_line_pointer++;
708
709 know (c != ' '); /* No further leading whitespace. */
252b5132
RH		 710
711#ifndef NO_LISTING
712 /* If listing is on, and we are expanding a macro, then give
713 the listing code the contents of the expanded line. */
714 if (listing)
715 {
716 if ((listing & LISTING_MACEXP) && macro_nest > 0)
717 {
718 char *copy;
719 int len;
720
721 /* Find the end of the current expanded macro line. */
40a4d956 722 s = find_end_of_line (input_line_pointer - 1, flag_m68k_mri);
252b5132 723
5e75c3ab
JB		 724 if (s != last_eol)
725 {
726 last_eol = s;
727 /* Copy it for safe keeping. Also give an indication of
728 how much macro nesting is involved at this point. */
729 len = s - (input_line_pointer - 1);
730 copy = (char *) xmalloc (len + macro_nest + 2);
731 memset (copy, '>', macro_nest);
732 copy[macro_nest] = ' ';
733 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
734 copy[macro_nest + 1 + len] = '\0';
735
736 /* Install the line with the listing facility. */
737 listing_newline (copy);
738 }
252b5132
RH		 739 }
740 else
741 listing_newline (NULL);
742 }
743#endif
041ff4dd
NC		 744 /* C is the 1st significant character.
745 Input_line_pointer points after that character. */
252b5132
RH		 746 if (is_name_beginner (c))
747 {
041ff4dd 748 /* Want user-defined label or pseudo/opcode. */
252b5132
RH		 749 HANDLE_CONDITIONAL_ASSEMBLY ();
750
751 s = --input_line_pointer;
041ff4dd
NC		 752 c = get_symbol_end (); /* name's delimiter. */
753
754 /* C is character after symbol.
d6415f6c
AM		 755 That character's place in the input line is now '\0'.
756 S points to the beginning of the symbol.
757 [In case of pseudo-op, s->'.'.]
758 Input_line_pointer->'\0' where c was. */
041ff4dd 759 if (TC_START_LABEL (c, input_line_pointer))
252b5132
RH		 760 {
761 if (flag_m68k_mri)
762 {
763 char *rest = input_line_pointer + 1;
764
765 /* In MRI mode, \tsym: set 0 is permitted. */
252b5132
RH		 766 if (*rest == ':')
767 ++rest;
f0e652b4 768
252b5132
RH		 769 if (*rest == ' ' || *rest == '\t')
770 ++rest;
f0e652b4 771
252b5132
RH		 772 if ((strncasecmp (rest, "EQU", 3) == 0
773 || strncasecmp (rest, "SET", 3) == 0)
774 && (rest[3] == ' ' || rest[3] == '\t'))
775 {
776 input_line_pointer = rest + 3;
777 equals (s, 1);
778 continue;
779 }
780 }
781
041ff4dd
NC		 782 line_label = colon (s); /* User-defined label. */
783 /* Put ':' back for error messages' sake. */
784 *input_line_pointer++ = ':';
a645d1eb
L		 785#ifdef tc_check_label
786 tc_check_label (line_label);
787#endif
041ff4dd 788 /* Input_line_pointer->after ':'. */
252b5132 789 SKIP_WHITESPACE ();
252b5132 790 }
9497f5ac
NC		 791 else if (input_line_pointer[1] == '='
792 && (c == '='
793 || ((c == ' ' || c == '\t')
794 && input_line_pointer[2] == '=')))
795 {
796 equals (s, -1);
797 demand_empty_rest_of_line ();
798 }
ee3c9814
CM		 799 else if ((c == '='
800 || ((c == ' ' || c == '\t')
801 && input_line_pointer[1] == '='))
802#ifdef TC_EQUAL_IN_INSN
803 && !TC_EQUAL_IN_INSN (c, s)
804#endif
805 )
252b5132
RH		 806 {
807 equals (s, 1);
808 demand_empty_rest_of_line ();
809 }
810 else
041ff4dd
NC		 811 {
812 /* Expect pseudo-op or machine instruction. */
252b5132
RH		 813 pop = NULL;
814
a8a3b3b2 815#ifndef TC_CASE_SENSITIVE
252b5132
RH		 816 {
817 char *s2 = s;
37d8bb27
NC		 818
819 strncpy (original_case_string, s2, sizeof (original_case_string));
820 original_case_string[sizeof (original_case_string) - 1] = 0;
ef99799a 821
252b5132
RH		 822 while (*s2)
823 {
3882b010 824 *s2 = TOLOWER (*s2);
252b5132
RH		 825 s2++;
826 }
827 }
828#endif
abd63a32 829 if (NO_PSEUDO_DOT || flag_m68k_mri)
252b5132 830 {
7be1c489
AM		 831 /* The MRI assembler uses pseudo-ops without
832 a period. */
252b5132
RH		 833 pop = (pseudo_typeS *) hash_find (po_hash, s);
834 if (pop != NULL && pop->poc_handler == NULL)
835 pop = NULL;
836 }
837
838 if (pop != NULL
041ff4dd 839 || (!flag_m68k_mri && *s == '.'))
252b5132 840 {
041ff4dd 841 /* PSEUDO - OP.
f0e652b4 842
d6415f6c
AM		 843 WARNING: c has next char, which may be end-of-line.
844 We lookup the pseudo-op table with s+1 because we
845 already know that the pseudo-op begins with a '.'. */
252b5132
RH		 846
847 if (pop == NULL)
848 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
e4475e39
NS		 849 if (pop && !pop->poc_handler)
850 pop = NULL;
252b5132
RH		 851
852 /* In MRI mode, we may need to insert an
d6415f6c
AM		 853 automatic alignment directive. What a hack
854 this is. */
252b5132
RH		 855 if (mri_pending_align
856 && (pop == NULL
041ff4dd
NC		 857 || !((pop->poc_handler == cons
858 && pop->poc_val == 1)
859 || (pop->poc_handler == s_space
860 && pop->poc_val == 1)
252b5132 861#ifdef tc_conditional_pseudoop
041ff4dd 862 || tc_conditional_pseudoop (pop)
252b5132 863#endif
041ff4dd
NC		 864 || pop->poc_handler == s_if
865 || pop->poc_handler == s_ifdef
866 || pop->poc_handler == s_ifc
867 || pop->poc_handler == s_ifeqs
868 || pop->poc_handler == s_else
869 || pop->poc_handler == s_endif
870 || pop->poc_handler == s_globl
871 || pop->poc_handler == s_ignore)))
252b5132
RH		 872 {
873 do_align (1, (char *) NULL, 0, 0);
874 mri_pending_align = 0;
f0e652b4 875
252b5132
RH		 876 if (line_label != NULL)
877 {
2b47531b 878 symbol_set_frag (line_label, frag_now);
252b5132
RH		 879 S_SET_VALUE (line_label, frag_now_fix ());
880 }
881 }
882
041ff4dd 883 /* Print the error msg now, while we still can. */
252b5132
RH		 884 if (pop == NULL)
885 {
5e75c3ab
JB		 886 char *end = input_line_pointer;
887
252b5132
RH		 888 *input_line_pointer = c;
889 s_ignore (0);
5e75c3ab
JB		 890 c = *--input_line_pointer;
891 *input_line_pointer = '\0';
892 if (! macro_defined || ! try_macro (c, s))
893 {
894 *end = '\0';
895 as_bad (_("unknown pseudo-op: `%s'"), s);
896 *input_line_pointer++ = c;
897 }
252b5132
RH		 898 continue;
899 }
900
041ff4dd 901 /* Put it back for error messages etc. */
252b5132
RH		 902 *input_line_pointer = c;
903 /* The following skip of whitespace is compulsory.
904 A well shaped space is sometimes all that separates
041ff4dd 905 keyword from operands. */
252b5132
RH		 906 if (c == ' ' || c == '\t')
907 input_line_pointer++;
041ff4dd
NC		 908
909 /* Input_line is restored.
d6415f6c
AM		 910 Input_line_pointer->1st non-blank char
911 after pseudo-operation. */
252b5132
RH		 912 (*pop->poc_handler) (pop->poc_val);
913
914 /* If that was .end, just get out now. */
915 if (pop->poc_handler == s_end)
916 goto quit;
917 }
918 else
919 {
041ff4dd
NC		 920 /* WARNING: c has char, which may be end-of-line. */
921 /* Also: input_line_pointer->`\0` where c was. */
252b5132 922 *input_line_pointer = c;
40a4d956 923 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1);
252b5132
RH		 924 c = *input_line_pointer;
925 *input_line_pointer = '\0';
926
927 generate_lineno_debug ();
928
5e75c3ab
JB		 929 if (macro_defined && try_macro (c, s))
930 continue;
252b5132
RH		 931
932 if (mri_pending_align)
933 {
934 do_align (1, (char *) NULL, 0, 0);
935 mri_pending_align = 0;
936 if (line_label != NULL)
937 {
2b47531b 938 symbol_set_frag (line_label, frag_now);
252b5132
RH		 939 S_SET_VALUE (line_label, frag_now_fix ());
940 }
941 }
942
041ff4dd 943 md_assemble (s); /* Assemble 1 instruction. */
252b5132
RH		 944
945 *input_line_pointer++ = c;
946
947 /* We resume loop AFTER the end-of-line from
041ff4dd
NC		 948 this instruction. */
949 }
950 }
252b5132 951 continue;
041ff4dd 952 }
252b5132
RH		 953
954 /* Empty statement? */
955 if (is_end_of_line[(unsigned char) c])
956 continue;
957
3882b010 958 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
252b5132 959 {
041ff4dd 960 /* local label ("4:") */
252b5132
RH		 961 char *backup = input_line_pointer;
962
963 HANDLE_CONDITIONAL_ASSEMBLY ();
964
965 temp = c - '0';
966
041ff4dd 967 /* Read the whole number. */
3882b010 968 while (ISDIGIT (*input_line_pointer))
252b5132
RH		 969 {
970 temp = (temp * 10) + *input_line_pointer - '0';
971 ++input_line_pointer;
041ff4dd 972 }
252b5132
RH		 973
974 if (LOCAL_LABELS_DOLLAR
975 && *input_line_pointer == '$'
976 && *(input_line_pointer + 1) == ':')
977 {
978 input_line_pointer += 2;
979
980 if (dollar_label_defined (temp))
981 {
982 as_fatal (_("label \"%d$\" redefined"), temp);
983 }
984
985 define_dollar_label (temp);
986 colon (dollar_label_name (temp, 0));
987 continue;
988 }
989
990 if (LOCAL_LABELS_FB
991 && *input_line_pointer++ == ':')
992 {
993 fb_label_instance_inc (temp);
994 colon (fb_label_name (temp, 0));
995 continue;
996 }
997
998 input_line_pointer = backup;
999 } /* local label ("4:") */
1000
1001 if (c && strchr (line_comment_chars, c))
041ff4dd 1002 { /* Its a comment. Better say APP or NO_APP. */
64e55042 1003 sb sbuf;
252b5132
RH		 1004 char *ends;
1005 char *new_buf;
1006 char *new_tmp;
1007 unsigned int new_length;
1008 char *tmp_buf = 0;
1009
1010 bump_line_counters ();
1011 s = input_line_pointer;
1012 if (strncmp (s, "APP\n", 4))
1013 continue; /* We ignore it */
1014 s += 4;
1015
64e55042 1016 sb_new (&sbuf);
252b5132
RH		 1017 ends = strstr (s, "#NO_APP\n");
1018
1019 if (!ends)
1020 {
1021 unsigned int tmp_len;
1022 unsigned int num;
1023
1024 /* The end of the #APP wasn't in this buffer. We
1025 keep reading in buffers until we find the #NO_APP
1026 that goes with this #APP There is one. The specs
47eebc20 1027 guarantee it... */
252b5132
RH		 1028 tmp_len = buffer_limit - s;
1029 tmp_buf = xmalloc (tmp_len + 1);
1030 memcpy (tmp_buf, s, tmp_len);
1031 do
1032 {
1033 new_tmp = input_scrub_next_buffer (&buffer);
1034 if (!new_tmp)
1035 break;
1036 else
1037 buffer_limit = new_tmp;
1038 input_line_pointer = buffer;
1039 ends = strstr (buffer, "#NO_APP\n");
1040 if (ends)
1041 num = ends - buffer;
1042 else
1043 num = buffer_limit - buffer;
1044
1045 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1046 memcpy (tmp_buf + tmp_len, buffer, num);
1047 tmp_len += num;
1048 }
1049 while (!ends);
1050
1051 input_line_pointer = ends ? ends + 8 : NULL;
1052
1053 s = tmp_buf;
1054 ends = s + tmp_len;
1055
1056 }
1057 else
1058 {
1059 input_line_pointer = ends + 8;
1060 }
1061
1062 scrub_string = s;
1063 scrub_string_end = ends;
1064
1065 new_length = ends - s;
1066 new_buf = (char *) xmalloc (new_length);
1067 new_tmp = new_buf;
1068 for (;;)
1069 {
1070 int space;
1071 int size;
1072
1073 space = (new_buf + new_length) - new_tmp;
1074 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1075
1076 if (size < space)
1077 {
64e55042 1078 new_tmp[size] = 0;
252b5132
RH		 1079 break;
1080 }
1081
1082 new_buf = xrealloc (new_buf, new_length + 100);
1083 new_tmp = new_buf + new_length;
1084 new_length += 100;
1085 }
1086
1087 if (tmp_buf)
1088 free (tmp_buf);
f0e652b4 1089
64e55042
HPN		 1090 /* We've "scrubbed" input to the preferred format. In the
1091 process we may have consumed the whole of the remaining
1092 file (and included files). We handle this formatted
1093 input similar to that of macro expansion, letting
1094 actual macro expansion (possibly nested) and other
1095 input expansion work. Beware that in messages, line
1096 numbers and possibly file names will be incorrect. */
1097 sb_add_string (&sbuf, new_buf);
1098 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1099 sb_kill (&sbuf);
1100 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1101 free (new_buf);
252b5132
RH		 1102 continue;
1103 }
1104
1105 HANDLE_CONDITIONAL_ASSEMBLY ();
1106
1107#ifdef tc_unrecognized_line
1108 if (tc_unrecognized_line (c))
1109 continue;
1110#endif
0e389e77
AM		 1111 input_line_pointer--;
1112 /* Report unknown char as ignored. */
c95b35a9 1113 demand_empty_rest_of_line ();
041ff4dd 1114 }
252b5132
RH		 1115
1116#ifdef md_after_pass_hook
1117 md_after_pass_hook ();
1118#endif
041ff4dd 1119 }
252b5132
RH		 1120
1121 quit:
1122
1123#ifdef md_cleanup
041ff4dd 1124 md_cleanup ();
252b5132 1125#endif
041ff4dd
NC		 1126 /* Close the input file. */
1127 input_scrub_close ();
4c400d5e
AM		 1128#ifdef WARN_COMMENTS
1129 {
1130 if (warn_comment && found_comment)
1131 as_warn_where (found_comment_file, found_comment,
1132 "first comment found here");
1133 }
1134#endif
252b5132
RH		 1135}
1136
e5604d79
RS		 1137/* Convert O_constant expression EXP into the equivalent O_big representation.
1138 Take the sign of the number from X_unsigned rather than X_add_number. */
1139
1140static void
1141convert_to_bignum (expressionS *exp)
1142{
1143 valueT value;
1144 unsigned int i;
1145
1146 value = exp->X_add_number;
1147 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1148 {
1149 generic_bignum[i] = value & LITTLENUM_MASK;
1150 value >>= LITTLENUM_NUMBER_OF_BITS;
1151 }
1152 /* Add a sequence of sign bits if the top bit of X_add_number is not
1153 the sign of the original value. */
1154 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1155 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1156 exp->X_op = O_big;
1157 exp->X_add_number = i;
1158}
1159
252b5132
RH		 1160/* For most MRI pseudo-ops, the line actually ends at the first
1161 nonquoted space. This function looks for that point, stuffs a null
1162 in, and sets *STOPCP to the character that used to be there, and
1163 returns the location.
1164
1165 Until I hear otherwise, I am going to assume that this is only true
1166 for the m68k MRI assembler. */
1167
1168char *
39e6acbd 1169mri_comment_field (char *stopcp)
252b5132 1170{
252b5132 1171 char *s;
041ff4dd 1172#ifdef TC_M68K
252b5132
RH		 1173 int inquote = 0;
1174
1175 know (flag_m68k_mri);
1176
1177 for (s = input_line_pointer;
041ff4dd 1178 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
252b5132
RH		 1179 || inquote);
1180 s++)
1181 {
1182 if (*s == '\'')
041ff4dd 1183 inquote = !inquote;
252b5132 1184 }
252b5132 1185#else
041ff4dd
NC		 1186 for (s = input_line_pointer;
1187 !is_end_of_line[(unsigned char) *s];
1188 s++)
252b5132 1189 ;
041ff4dd 1190#endif
252b5132
RH		 1191 *stopcp = *s;
1192 *s = '\0';
f0e652b4 1193
252b5132 1194 return s;
252b5132
RH		 1195}
1196
1197/* Skip to the end of an MRI comment field. */
1198
1199void
39e6acbd 1200mri_comment_end (char *stop, int stopc)
252b5132
RH		 1201{
1202 know (flag_mri);
1203
1204 input_line_pointer = stop;
1205 *stop = stopc;
041ff4dd 1206 while (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 1207 ++input_line_pointer;
1208}
1209
041ff4dd 1210void
39e6acbd 1211s_abort (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1212{
1213 as_fatal (_(".abort detected. Abandoning ship."));
1214}
1215
1216/* Guts of .align directive. N is the power of two to which to align.
1217 FILL may be NULL, or it may point to the bytes of the fill pattern.
1218 LEN is the length of whatever FILL points to, if anything. MAX is
1219 the maximum number of characters to skip when doing the alignment,
1220 or 0 if there is no maximum. */
1221
041ff4dd 1222static void
39e6acbd 1223do_align (int n, char *fill, int len, int max)
252b5132 1224{
ebeb9253
AM		 1225 if (now_seg == absolute_section)
1226 {
1227 if (fill != NULL)
1228 while (len-- > 0)
1229 if (*fill++ != '\0')
1230 {
1231 as_warn (_("ignoring fill value in absolute section"));
1232 break;
1233 }
1234 fill = NULL;
1235 len = 0;
1236 }
1237
b8861cfb
NS		 1238#ifdef md_flush_pending_output
1239 md_flush_pending_output ();
1240#endif
252b5132
RH		 1241#ifdef md_do_align
1242 md_do_align (n, fill, len, max, just_record_alignment);
1243#endif
1244
041ff4dd 1245 /* Only make a frag if we HAVE to... */
252b5132
RH		 1246 if (n != 0 && !need_pass_2)
1247 {
0a9ef439
RH		 1248 if (fill == NULL)
1249 {
1250 if (subseg_text_p (now_seg))
1251 frag_align_code (n, max);
1252 else
1253 frag_align (n, 0, max);
1254 }
1255 else if (len <= 1)
252b5132
RH		 1256 frag_align (n, *fill, max);
1257 else
1258 frag_align_pattern (n, fill, len, max);
1259 }
1260
1261#ifdef md_do_align
a6bd2a4f 1262 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
252b5132
RH		 1263#endif
1264
bea9907b 1265 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
252b5132
RH		 1266}
1267
1268/* Handle the .align pseudo-op. A positive ARG is a default alignment
1269 (in bytes). A negative ARG is the negative of the length of the
1270 fill pattern. BYTES_P is non-zero if the alignment value should be
1271 interpreted as the byte boundary, rather than the power of 2. */
1272
9ebd302d 1273#define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
9ebd302d 1274
252b5132 1275static void
39e6acbd 1276s_align (int arg, int bytes_p)
252b5132 1277{
b617dc20 1278 unsigned int align_limit = ALIGN_LIMIT;
9ebd302d 1279 unsigned int align;
252b5132
RH		 1280 char *stop = NULL;
1281 char stopc;
1282 offsetT fill = 0;
1283 int max;
1284 int fill_p;
1285
1286 if (flag_mri)
1287 stop = mri_comment_field (&stopc);
1288
1289 if (is_end_of_line[(unsigned char) *input_line_pointer])
1290 {
1291 if (arg < 0)
1292 align = 0;
1293 else
041ff4dd 1294 align = arg; /* Default value from pseudo-op table. */
252b5132
RH		 1295 }
1296 else
1297 {
1298 align = get_absolute_expression ();
1299 SKIP_WHITESPACE ();
1300 }
1301
1302 if (bytes_p)
1303 {
1304 /* Convert to a power of 2. */
1305 if (align != 0)
1306 {
1307 unsigned int i;
1308
1309 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1310 ;
1311 if (align != 1)
0e389e77 1312 as_bad (_("alignment not a power of 2"));
f0e652b4 1313
252b5132
RH		 1314 align = i;
1315 }
1316 }
1317
b617dc20 1318 if (align > align_limit)
252b5132 1319 {
b617dc20 1320 align = align_limit;
0e389e77 1321 as_warn (_("alignment too large: %u assumed"), align);
252b5132
RH		 1322 }
1323
1324 if (*input_line_pointer != ',')
1325 {
1326 fill_p = 0;
1327 max = 0;
1328 }
1329 else
1330 {
1331 ++input_line_pointer;
1332 if (*input_line_pointer == ',')
1333 fill_p = 0;
1334 else
1335 {
1336 fill = get_absolute_expression ();
1337 SKIP_WHITESPACE ();
1338 fill_p = 1;
1339 }
1340
1341 if (*input_line_pointer != ',')
1342 max = 0;
1343 else
1344 {
1345 ++input_line_pointer;
1346 max = get_absolute_expression ();
1347 }
1348 }
1349
041ff4dd 1350 if (!fill_p)
252b5132
RH		 1351 {
1352 if (arg < 0)
1353 as_warn (_("expected fill pattern missing"));
1354 do_align (align, (char *) NULL, 0, max);
1355 }
1356 else
1357 {
1358 int fill_len;
1359
1360 if (arg >= 0)
1361 fill_len = 1;
1362 else
041ff4dd 1363 fill_len = -arg;
252b5132
RH		 1364 if (fill_len <= 1)
1365 {
1366 char fill_char;
1367
1368 fill_char = fill;
1369 do_align (align, &fill_char, fill_len, max);
1370 }
1371 else
1372 {
1373 char ab[16];
1374
1375 if ((size_t) fill_len > sizeof ab)
1376 abort ();
1377 md_number_to_chars (ab, fill, fill_len);
1378 do_align (align, ab, fill_len, max);
1379 }
1380 }
1381
1382 demand_empty_rest_of_line ();
1383
1384 if (flag_mri)
1385 mri_comment_end (stop, stopc);
1386}
1387
1388/* Handle the .align pseudo-op on machines where ".align 4" means
1389 align to a 4 byte boundary. */
1390
041ff4dd 1391void
39e6acbd 1392s_align_bytes (int arg)
252b5132
RH		 1393{
1394 s_align (arg, 1);
1395}
1396
1397/* Handle the .align pseudo-op on machines where ".align 4" means align
1398 to a 2**4 boundary. */
1399
041ff4dd 1400void
39e6acbd 1401s_align_ptwo (int arg)
252b5132
RH		 1402{
1403 s_align (arg, 0);
1404}
1405
caa32fe5
NC		 1406/* Switch in and out of alternate macro mode. */
1407
1408void
1409s_altmacro (int on)
1410{
1411 demand_empty_rest_of_line ();
1412 macro_set_alternate (on);
1413}
1414
e13bab5a
AM		 1415symbolS *
1416s_comm_internal (int param,
1417 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
252b5132 1418{
e13bab5a
AM		 1419 char *name;
1420 char c;
1421 char *p;
1422 offsetT temp, size;
1423 symbolS *symbolP = NULL;
252b5132
RH		 1424 char *stop = NULL;
1425 char stopc;
e13bab5a 1426 expressionS exp;
252b5132
RH		 1427
1428 if (flag_mri)
1429 stop = mri_comment_field (&stopc);
1430
1431 name = input_line_pointer;
1432 c = get_symbol_end ();
041ff4dd 1433 /* Just after name is now '\0'. */
252b5132
RH		 1434 p = input_line_pointer;
1435 *p = c;
0e389e77
AM		 1436
1437 if (name == p)
1438 {
1439 as_bad (_("expected symbol name"));
40a4d956 1440 ignore_rest_of_line ();
e13bab5a 1441 goto out;
0e389e77
AM		 1442 }
1443
252b5132 1444 SKIP_WHITESPACE ();
f0e652b4 1445
e13bab5a
AM		 1446 /* Accept an optional comma after the name. The comma used to be
1447 required, but Irix 5 cc does not generate it for .lcomm. */
1448 if (*input_line_pointer == ',')
1449 input_line_pointer++;
1450
e13bab5a
AM		 1451 temp = get_absolute_expr (&exp);
1452 size = temp;
e13bab5a 1453 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
e13bab5a 1454 if (exp.X_op == O_absent)
252b5132 1455 {
e13bab5a 1456 as_bad (_("missing size expression"));
252b5132 1457 ignore_rest_of_line ();
e13bab5a 1458 goto out;
252b5132 1459 }
e13bab5a 1460 else if (temp != size || !exp.X_unsigned)
252b5132 1461 {
e13bab5a 1462 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
252b5132 1463 ignore_rest_of_line ();
e13bab5a 1464 goto out;
252b5132 1465 }
f0e652b4 1466
a207757e 1467 *p = 0;
252b5132 1468 symbolP = symbol_find_or_make (name);
041ff4dd 1469 if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
252b5132 1470 {
e13bab5a
AM		 1471 symbolP = NULL;
1472 as_bad (_("symbol `%s' is already defined"), name);
1473 *p = c;
252b5132 1474 ignore_rest_of_line ();
e13bab5a 1475 goto out;
252b5132 1476 }
f0e652b4 1477
e13bab5a
AM		 1478 size = S_GET_VALUE (symbolP);
1479 if (size == 0)
1480 size = temp;
1481 else if (size != temp)
1482 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1483 name, (long) size, (long) temp);
1484
1485 *p = c;
1486 if (comm_parse_extra != NULL)
1487 symbolP = (*comm_parse_extra) (param, symbolP, size);
252b5132
RH		 1488 else
1489 {
e13bab5a 1490 S_SET_VALUE (symbolP, (valueT) size);
252b5132 1491 S_SET_EXTERNAL (symbolP);
252b5132 1492#ifdef OBJ_VMS
e13bab5a
AM		 1493 {
1494 extern int flag_one;
1495 if (size == 0 || !flag_one)
1496 S_GET_OTHER (symbolP) = const_flag;
1497 }
1498#endif
1499 }
252b5132
RH		 1500
1501 demand_empty_rest_of_line ();
e13bab5a 1502 out:
252b5132
RH		 1503 if (flag_mri)
1504 mri_comment_end (stop, stopc);
e13bab5a
AM		 1505 return symbolP;
1506}
1507
1508void
1509s_comm (int ignore)
1510{
1511 s_comm_internal (ignore, NULL);
1512}
252b5132
RH		 1513
1514/* The MRI COMMON pseudo-op. We handle this by creating a common
1515 symbol with the appropriate name. We make s_space do the right
1516 thing by increasing the size. */
1517
1518void
39e6acbd 1519s_mri_common (int small ATTRIBUTE_UNUSED)
252b5132
RH		 1520{
1521 char *name;
1522 char c;
1523 char *alc = NULL;
1524 symbolS *sym;
1525 offsetT align;
1526 char *stop = NULL;
1527 char stopc;
1528
041ff4dd 1529 if (!flag_mri)
252b5132
RH		 1530 {
1531 s_comm (0);
1532 return;
1533 }
1534
1535 stop = mri_comment_field (&stopc);
1536
1537 SKIP_WHITESPACE ();
1538
1539 name = input_line_pointer;
3882b010 1540 if (!ISDIGIT (*name))
252b5132
RH		 1541 c = get_symbol_end ();
1542 else
1543 {
1544 do
1545 {
1546 ++input_line_pointer;
1547 }
3882b010 1548 while (ISDIGIT (*input_line_pointer));
f0e652b4 1549
252b5132
RH		 1550 c = *input_line_pointer;
1551 *input_line_pointer = '\0';
1552
1553 if (line_label != NULL)
1554 {
1555 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1556 + (input_line_pointer - name)
1557 + 1);
1558 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1559 name = alc;
1560 }
1561 }
1562
1563 sym = symbol_find_or_make (name);
1564 *input_line_pointer = c;
1565 if (alc != NULL)
1566 free (alc);
1567
1568 if (*input_line_pointer != ',')
1569 align = 0;
1570 else
1571 {
1572 ++input_line_pointer;
1573 align = get_absolute_expression ();
1574 }
1575
041ff4dd 1576 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
252b5132 1577 {
0e389e77 1578 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
252b5132
RH		 1579 ignore_rest_of_line ();
1580 mri_comment_end (stop, stopc);
1581 return;
1582 }
1583
1584 S_SET_EXTERNAL (sym);
1585 mri_common_symbol = sym;
1586
1587#ifdef S_SET_ALIGN
1588 if (align != 0)
1589 S_SET_ALIGN (sym, align);
1590#endif
1591
1592 if (line_label != NULL)
1593 {
2b47531b
ILT		 1594 expressionS exp;
1595 exp.X_op = O_symbol;
1596 exp.X_add_symbol = sym;
1597 exp.X_add_number = 0;
1598 symbol_set_value_expression (line_label, &exp);
1599 symbol_set_frag (line_label, &zero_address_frag);
252b5132
RH		 1600 S_SET_SEGMENT (line_label, expr_section);
1601 }
1602
1603 /* FIXME: We just ignore the small argument, which distinguishes
1604 COMMON and COMMON.S. I don't know what we can do about it. */
1605
1606 /* Ignore the type and hptype. */
1607 if (*input_line_pointer == ',')
1608 input_line_pointer += 2;
1609 if (*input_line_pointer == ',')
1610 input_line_pointer += 2;
1611
1612 demand_empty_rest_of_line ();
1613
1614 mri_comment_end (stop, stopc);
1615}
1616
1617void
39e6acbd 1618s_data (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1619{
1620 segT section;
1621 register int temp;
1622
1623 temp = get_absolute_expression ();
1624 if (flag_readonly_data_in_text)
1625 {
1626 section = text_section;
1627 temp += 1000;
1628 }
1629 else
1630 section = data_section;
1631
1632 subseg_set (section, (subsegT) temp);
1633
1634#ifdef OBJ_VMS
1635 const_flag = 0;
1636#endif
1637 demand_empty_rest_of_line ();
1638}
1639
1640/* Handle the .appfile pseudo-op. This is automatically generated by
1641 do_scrub_chars when a preprocessor # line comment is seen with a
1642 file name. This default definition may be overridden by the object
1643 or CPU specific pseudo-ops. This function is also the default
1644 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1645 .file. */
1646
ecb4347a 1647void
f17c130b 1648s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
ecb4347a
DJ		 1649{
1650#ifdef LISTING
1651 if (listing)
1652 listing_source_file (file);
1653#endif
1654 register_dependency (file);
1655#ifdef obj_app_file
c04f5787 1656 obj_app_file (file, appfile);
ecb4347a
DJ		 1657#endif
1658}
1659
041ff4dd 1660void
39e6acbd 1661s_app_file (int appfile)
252b5132
RH		 1662{
1663 register char *s;
1664 int length;
1665
041ff4dd 1666 /* Some assemblers tolerate immediately following '"'. */
252b5132
RH		 1667 if ((s = demand_copy_string (&length)) != 0)
1668 {
1669 /* If this is a fake .appfile, a fake newline was inserted into
1670 the buffer. Passing -2 to new_logical_line tells it to
1671 account for it. */
1672 int may_omit
041ff4dd 1673 = (!new_logical_line (s, appfile ? -2 : -1) && appfile);
252b5132
RH		 1674
1675 /* In MRI mode, the preprocessor may have inserted an extraneous
d6415f6c 1676 backquote. */
252b5132
RH		 1677 if (flag_m68k_mri
1678 && *input_line_pointer == '\''
1679 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1680 ++input_line_pointer;
1681
1682 demand_empty_rest_of_line ();
041ff4dd 1683 if (!may_omit)
c04f5787 1684 s_app_file_string (s, appfile);
252b5132
RH		 1685 }
1686}
1687
1688/* Handle the .appline pseudo-op. This is automatically generated by
1689 do_scrub_chars when a preprocessor # line comment is seen. This
1690 default definition may be overridden by the object or CPU specific
1691 pseudo-ops. */
1692
1693void
39e6acbd 1694s_app_line (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1695{
1696 int l;
1697
1698 /* The given number is that of the next line. */
1699 l = get_absolute_expression () - 1;
47837f8e
NC		 1700
1701 if (l < -1)
252b5132 1702 /* Some of the back ends can't deal with non-positive line numbers.
47837f8e
NC		 1703 Besides, it's silly. GCC however will generate a line number of
1704 zero when it is pre-processing builtins for assembler-with-cpp files:
1705
1706 # 0 "<built-in>"
1707
1708 We do not want to barf on this, especially since such files are used
1709 in the GCC and GDB testsuites. So we check for negative line numbers
1710 rather than non-positive line numbers. */
0e389e77 1711 as_warn (_("line numbers must be positive; line number %d rejected"),
041ff4dd 1712 l + 1);
252b5132
RH		 1713 else
1714 {
1715 new_logical_line ((char *) NULL, l);
1716#ifdef LISTING
1717 if (listing)
1718 listing_source_line (l);
1719#endif
1720 }
1721 demand_empty_rest_of_line ();
1722}
1723
1724/* Handle the .end pseudo-op. Actually, the real work is done in
1725 read_a_source_file. */
1726
1727void
39e6acbd 1728s_end (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1729{
1730 if (flag_mri)
1731 {
1732 /* The MRI assembler permits the start symbol to follow .end,
d6415f6c 1733 but we don't support that. */
252b5132 1734 SKIP_WHITESPACE ();
041ff4dd 1735 if (!is_end_of_line[(unsigned char) *input_line_pointer]
252b5132
RH		 1736 && *input_line_pointer != '*'
1737 && *input_line_pointer != '!')
1738 as_warn (_("start address not supported"));
1739 }
1740}
1741
1742/* Handle the .err pseudo-op. */
1743
1744void
39e6acbd 1745s_err (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1746{
1747 as_bad (_(".err encountered"));
1748 demand_empty_rest_of_line ();
d190d046
HPN		 1749}
1750
1751/* Handle the .error and .warning pseudo-ops. */
1752
1753void
1754s_errwarn (int err)
1755{
1756 int len;
1757 /* The purpose for the conditional assignment is not to
1758 internationalize the directive itself, but that we need a
1759 self-contained message, one that can be passed like the
1760 demand_copy_C_string return value, and with no assumption on the
1761 location of the name of the directive within the message. */
1762 char *msg
1763 = (err ? _(".error directive invoked in source file")
1764 : _(".warning directive invoked in source file"));
1765
1766 if (!is_it_end_of_statement ())
1767 {
1768 if (*input_line_pointer != '\"')
1769 {
1770 as_bad (_("%s argument must be a string"),
1771 err ? ".error" : ".warning");
40a4d956 1772 ignore_rest_of_line ();
d190d046
HPN		 1773 return;
1774 }
1775
1776 msg = demand_copy_C_string (&len);
1777 if (msg == NULL)
1778 return;
1779 }
1780
1781 if (err)
1782 as_bad ("%s", msg);
1783 else
1784 as_warn ("%s", msg);
1785 demand_empty_rest_of_line ();
252b5132
RH		 1786}
1787
1788/* Handle the MRI fail pseudo-op. */
1789
1790void
39e6acbd 1791s_fail (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1792{
1793 offsetT temp;
1794 char *stop = NULL;
1795 char stopc;
1796
1797 if (flag_mri)
1798 stop = mri_comment_field (&stopc);
1799
1800 temp = get_absolute_expression ();
1801 if (temp >= 500)
1802 as_warn (_(".fail %ld encountered"), (long) temp);
1803 else
1804 as_bad (_(".fail %ld encountered"), (long) temp);
1805
1806 demand_empty_rest_of_line ();
1807
1808 if (flag_mri)
1809 mri_comment_end (stop, stopc);
1810}
1811
041ff4dd 1812void
39e6acbd 1813s_fill (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1814{
1815 expressionS rep_exp;
1816 long size = 1;
1817 register long fill = 0;
1818 char *p;
1819
1820#ifdef md_flush_pending_output
1821 md_flush_pending_output ();
1822#endif
1823
1824 get_known_segmented_expression (&rep_exp);
1825 if (*input_line_pointer == ',')
1826 {
1827 input_line_pointer++;
1828 size = get_absolute_expression ();
1829 if (*input_line_pointer == ',')
1830 {
1831 input_line_pointer++;
1832 fill = get_absolute_expression ();
1833 }
1834 }
1835
1836 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1837#define BSD_FILL_SIZE_CROCK_8 (8)
1838 if (size > BSD_FILL_SIZE_CROCK_8)
1839 {
0e389e77 1840 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
252b5132
RH		 1841 size = BSD_FILL_SIZE_CROCK_8;
1842 }
1843 if (size < 0)
1844 {
0e389e77 1845 as_warn (_("size negative; .fill ignored"));
252b5132
RH		 1846 size = 0;
1847 }
1848 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1849 {
1850 if (rep_exp.X_add_number < 0)
0e389e77 1851 as_warn (_("repeat < 0; .fill ignored"));
252b5132
RH		 1852 size = 0;
1853 }
1854
1855 if (size && !need_pass_2)
1856 {
1857 if (rep_exp.X_op == O_constant)
1858 {
1859 p = frag_var (rs_fill, (int) size, (int) size,
1860 (relax_substateT) 0, (symbolS *) 0,
1861 (offsetT) rep_exp.X_add_number,
1862 (char *) 0);
1863 }
1864 else
1865 {
1866 /* We don't have a constant repeat count, so we can't use
1867 rs_fill. We can get the same results out of rs_space,
1868 but its argument is in bytes, so we must multiply the
1869 repeat count by size. */
1870
1871 symbolS *rep_sym;
1872 rep_sym = make_expr_symbol (&rep_exp);
1873 if (size != 1)
1874 {
1875 expressionS size_exp;
1876 size_exp.X_op = O_constant;
1877 size_exp.X_add_number = size;
1878
1879 rep_exp.X_op = O_multiply;
1880 rep_exp.X_add_symbol = rep_sym;
1881 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1882 rep_exp.X_add_number = 0;
1883 rep_sym = make_expr_symbol (&rep_exp);
1884 }
1885
1886 p = frag_var (rs_space, (int) size, (int) size,
1887 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1888 }
f0e652b4 1889
252b5132 1890 memset (p, 0, (unsigned int) size);
f0e652b4 1891
252b5132 1892 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
d6415f6c
AM		 1893 flavoured AS. The following bizarre behaviour is to be
1894 compatible with above. I guess they tried to take up to 8
1895 bytes from a 4-byte expression and they forgot to sign
1896 extend. */
252b5132
RH		 1897#define BSD_FILL_SIZE_CROCK_4 (4)
1898 md_number_to_chars (p, (valueT) fill,
1899 (size > BSD_FILL_SIZE_CROCK_4
1900 ? BSD_FILL_SIZE_CROCK_4
1901 : (int) size));
1902 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
d6415f6c
AM		 1903 but emits no error message because it seems a legal thing to do.
1904 It is a degenerate case of .fill but could be emitted by a
041ff4dd 1905 compiler. */
252b5132
RH		 1906 }
1907 demand_empty_rest_of_line ();
1908}
1909
041ff4dd 1910void
39e6acbd 1911s_globl (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1912{
1913 char *name;
1914 int c;
1915 symbolS *symbolP;
1916 char *stop = NULL;
1917 char stopc;
1918
1919 if (flag_mri)
1920 stop = mri_comment_field (&stopc);
1921
1922 do
1923 {
1924 name = input_line_pointer;
1925 c = get_symbol_end ();
1926 symbolP = symbol_find_or_make (name);
58b5739a
RH		 1927 S_SET_EXTERNAL (symbolP);
1928
252b5132
RH		 1929 *input_line_pointer = c;
1930 SKIP_WHITESPACE ();
58b5739a 1931 c = *input_line_pointer;
252b5132
RH		 1932 if (c == ',')
1933 {
1934 input_line_pointer++;
1935 SKIP_WHITESPACE ();
0e389e77 1936 if (is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 1937 c = '\n';
1938 }
1939 }
1940 while (c == ',');
1941
1942 demand_empty_rest_of_line ();
1943
1944 if (flag_mri)
1945 mri_comment_end (stop, stopc);
1946}
1947
1948/* Handle the MRI IRP and IRPC pseudo-ops. */
1949
1950void
39e6acbd 1951s_irp (int irpc)
252b5132 1952{
40a4d956 1953 char *file, *eol;
252b5132
RH		 1954 unsigned int line;
1955 sb s;
1956 const char *err;
1957 sb out;
1958
1959 as_where (&file, &line);
1960
1961 sb_new (&s);
40a4d956
JB		 1962 eol = find_end_of_line (input_line_pointer, 0);
1963 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
1964 input_line_pointer = eol;
252b5132
RH		 1965
1966 sb_new (&out);
1967
fea17916 1968 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
252b5132
RH		 1969 if (err != NULL)
1970 as_bad_where (file, line, "%s", err);
1971
1972 sb_kill (&s);
1973
9f10757c 1974 input_scrub_include_sb (&out, input_line_pointer, 1);
252b5132
RH		 1975 sb_kill (&out);
1976 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1977}
1978
1979/* Handle the .linkonce pseudo-op. This tells the assembler to mark
1980 the section to only be linked once. However, this is not supported
1981 by most object file formats. This takes an optional argument,
1982 which is what to do about duplicates. */
1983
1984void
39e6acbd 1985s_linkonce (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1986{
1987 enum linkonce_type type;
1988
1989 SKIP_WHITESPACE ();
1990
1991 type = LINKONCE_DISCARD;
1992
041ff4dd 1993 if (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 1994 {
1995 char *s;
1996 char c;
1997
1998 s = input_line_pointer;
1999 c = get_symbol_end ();
2000 if (strcasecmp (s, "discard") == 0)
2001 type = LINKONCE_DISCARD;
2002 else if (strcasecmp (s, "one_only") == 0)
2003 type = LINKONCE_ONE_ONLY;
2004 else if (strcasecmp (s, "same_size") == 0)
2005 type = LINKONCE_SAME_SIZE;
2006 else if (strcasecmp (s, "same_contents") == 0)
2007 type = LINKONCE_SAME_CONTENTS;
2008 else
2009 as_warn (_("unrecognized .linkonce type `%s'"), s);
2010
2011 *input_line_pointer = c;
2012 }
2013
2014#ifdef obj_handle_link_once
2015 obj_handle_link_once (type);
2016#else /* ! defined (obj_handle_link_once) */
252b5132
RH		 2017 {
2018 flagword flags;
2019
2020 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2021 as_warn (_(".linkonce is not supported for this object file format"));
2022
2023 flags = bfd_get_section_flags (stdoutput, now_seg);
2024 flags |= SEC_LINK_ONCE;
2025 switch (type)
2026 {
2027 default:
2028 abort ();
2029 case LINKONCE_DISCARD:
2030 flags |= SEC_LINK_DUPLICATES_DISCARD;
2031 break;
2032 case LINKONCE_ONE_ONLY:
2033 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2034 break;
2035 case LINKONCE_SAME_SIZE:
2036 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2037 break;
2038 case LINKONCE_SAME_CONTENTS:
2039 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2040 break;
2041 }
041ff4dd 2042 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
252b5132
RH		 2043 as_bad (_("bfd_set_section_flags: %s"),
2044 bfd_errmsg (bfd_get_error ()));
2045 }
252b5132
RH		 2046#endif /* ! defined (obj_handle_link_once) */
2047
2048 demand_empty_rest_of_line ();
2049}
2050
e13bab5a
AM		 2051void
2052bss_alloc (symbolS *symbolP, addressT size, int align)
252b5132 2053{
e13bab5a 2054 char *pfrag;
252b5132
RH		 2055 segT current_seg = now_seg;
2056 subsegT current_subseg = now_subseg;
252b5132
RH		 2057 segT bss_seg = bss_section;
2058
252b5132
RH		 2059#if defined (TC_MIPS) || defined (TC_ALPHA)
2060 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2061 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2062 {
2063 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
e13bab5a 2064 if (size <= bfd_get_gp_size (stdoutput))
252b5132
RH		 2065 {
2066 bss_seg = subseg_new (".sbss", 1);
2067 seg_info (bss_seg)->bss = 1;
041ff4dd 2068 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
252b5132
RH		 2069 as_warn (_("error setting flags for \".sbss\": %s"),
2070 bfd_errmsg (bfd_get_error ()));
252b5132
RH		 2071 }
2072 }
2073#endif
e13bab5a 2074 subseg_set (bss_seg, 1);
8684e216 2075
e13bab5a 2076 if (align)
041ff4dd 2077 {
e13bab5a
AM		 2078 record_alignment (bss_seg, align);
2079 frag_align (align, 0, 0);
041ff4dd 2080 }
252b5132 2081
e13bab5a
AM		 2082 /* Detach from old frag. */
2083 if (S_GET_SEGMENT (symbolP) == bss_seg)
2084 symbol_get_frag (symbolP)->fr_symbol = NULL;
f0e652b4 2085
e13bab5a
AM		 2086 symbol_set_frag (symbolP, frag_now);
2087 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2088 *pfrag = 0;
f0e652b4 2089
e13bab5a
AM		 2090#ifdef S_SET_SIZE
2091 S_SET_SIZE (symbolP, size);
2092#endif
2093 S_SET_SEGMENT (symbolP, bss_seg);
f0e652b4 2094
e13bab5a
AM		 2095#ifdef OBJ_COFF
2096 /* The symbol may already have been created with a preceding
2097 ".globl" directive -- be careful not to step on storage class
2098 in that case. Otherwise, set it to static. */
2099 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2100 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2101#endif /* OBJ_COFF */
f0e652b4 2102
e13bab5a
AM		 2103 subseg_set (current_seg, current_subseg);
2104}
f0e652b4 2105
e13bab5a
AM		 2106offsetT
2107parse_align (int align_bytes)
2108{
2109 expressionS exp;
2110 addressT align;
252b5132 2111
e13bab5a
AM		 2112 SKIP_WHITESPACE ();
2113 if (*input_line_pointer != ',')
2114 {
2115 no_align:
2116 as_bad (_("expected alignment after size"));
2117 ignore_rest_of_line ();
2118 return -1;
2119 }
f0e652b4 2120
e13bab5a
AM		 2121 input_line_pointer++;
2122 SKIP_WHITESPACE ();
f0e652b4 2123
e13bab5a
AM		 2124 align = get_absolute_expr (&exp);
2125 if (exp.X_op == O_absent)
2126 goto no_align;
2127
2128 if (!exp.X_unsigned)
2129 {
2130 as_warn (_("alignment negative; 0 assumed"));
2131 align = 0;
041ff4dd 2132 }
e13bab5a
AM		 2133
2134 if (align_bytes && align != 0)
252b5132 2135 {
e13bab5a
AM		 2136 /* convert to a power of 2 alignment */
2137 unsigned int alignp2 = 0;
2138 while ((align & 1) == 0)
2139 align >>= 1, ++alignp2;
2140 if (align != 1)
252b5132 2141 {
e13bab5a
AM		 2142 as_bad (_("alignment not a power of 2"));
2143 ignore_rest_of_line ();
2144 return -1;
252b5132 2145 }
e13bab5a 2146 align = alignp2;
252b5132 2147 }
e13bab5a
AM		 2148 return align;
2149}
252b5132 2150
e13bab5a
AM		 2151/* Called from s_comm_internal after symbol name and size have been
2152 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2153 1 if this was a ".bss" directive which has a 3rd argument
2154 (alignment as a power of 2), or 2 if this was a ".bss" directive
2155 with alignment in bytes. */
252b5132 2156
13c56984 2157symbolS *
e13bab5a
AM		 2158s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2159{
2160 addressT align = 0;
252b5132 2161
e13bab5a
AM		 2162 if (needs_align)
2163 {
2164 align = parse_align (needs_align - 1);
2165 if (align == (addressT) -1)
2166 return NULL;
252b5132
RH		 2167 }
2168 else
e13bab5a
AM		 2169 /* Assume some objects may require alignment on some systems. */
2170 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
252b5132 2171
e13bab5a
AM		 2172 bss_alloc (symbolP, size, align);
2173 return symbolP;
041ff4dd 2174}
252b5132
RH		 2175
2176void
39e6acbd 2177s_lcomm (int needs_align)
252b5132 2178{
e13bab5a 2179 s_comm_internal (needs_align, s_lcomm_internal);
252b5132
RH		 2180}
2181
041ff4dd 2182void
39e6acbd 2183s_lcomm_bytes (int needs_align)
252b5132 2184{
e13bab5a 2185 s_comm_internal (needs_align * 2, s_lcomm_internal);
252b5132
RH		 2186}
2187
041ff4dd 2188void
39e6acbd 2189s_lsym (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2190{
2191 register char *name;
2192 register char c;
2193 register char *p;
2194 expressionS exp;
2195 register symbolS *symbolP;
2196
041ff4dd 2197 /* We permit ANY defined expression: BSD4.2 demands constants. */
252b5132
RH		 2198 name = input_line_pointer;
2199 c = get_symbol_end ();
2200 p = input_line_pointer;
2201 *p = c;
0e389e77
AM		 2202
2203 if (name == p)
2204 {
2205 as_bad (_("expected symbol name"));
40a4d956 2206 ignore_rest_of_line ();
0e389e77
AM		 2207 return;
2208 }
2209
252b5132 2210 SKIP_WHITESPACE ();
f0e652b4 2211
252b5132
RH		 2212 if (*input_line_pointer != ',')
2213 {
2214 *p = 0;
0e389e77 2215 as_bad (_("expected comma after \"%s\""), name);
252b5132
RH		 2216 *p = c;
2217 ignore_rest_of_line ();
2218 return;
2219 }
f0e652b4 2220
252b5132 2221 input_line_pointer++;
9497f5ac 2222 expression_and_evaluate (&exp);
f0e652b4 2223
252b5132
RH		 2224 if (exp.X_op != O_constant
2225 && exp.X_op != O_register)
2226 {
2227 as_bad (_("bad expression"));
2228 ignore_rest_of_line ();
2229 return;
2230 }
f0e652b4 2231
252b5132
RH		 2232 *p = 0;
2233 symbolP = symbol_find_or_make (name);
2234
2235 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2236 symbolP->sy_desc == 0) out of this test because coff doesn't have
2237 those fields, and I can't see when they'd ever be tripped. I
2238 don't think I understand why they were here so I may have
2239 introduced a bug. As recently as 1.37 didn't have this test
041ff4dd 2240 anyway. xoxorich. */
252b5132
RH		 2241
2242 if (S_GET_SEGMENT (symbolP) == undefined_section
2243 && S_GET_VALUE (symbolP) == 0)
2244 {
2245 /* The name might be an undefined .global symbol; be sure to
041ff4dd 2246 keep the "external" bit. */
252b5132
RH		 2247 S_SET_SEGMENT (symbolP,
2248 (exp.X_op == O_constant
2249 ? absolute_section
2250 : reg_section));
2251 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2252 }
2253 else
2254 {
0e389e77 2255 as_bad (_("symbol `%s' is already defined"), name);
252b5132 2256 }
f0e652b4 2257
252b5132
RH		 2258 *p = c;
2259 demand_empty_rest_of_line ();
041ff4dd 2260}
252b5132 2261
0822d075
NC		 2262/* Read a line into an sb. Returns the character that ended the line
2263 or zero if there are no more lines. */
252b5132
RH		 2264
2265static int
39e6acbd 2266get_line_sb (sb *line)
252b5132 2267{
40a4d956 2268 char *eol;
252b5132
RH		 2269
2270 if (input_line_pointer[-1] == '\n')
2271 bump_line_counters ();
2272
2273 if (input_line_pointer >= buffer_limit)
2274 {
2275 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2276 if (buffer_limit == 0)
2277 return 0;
2278 }
2279
40a4d956
JB		 2280 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2281 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2282 input_line_pointer = eol;
f0e652b4 2283
0822d075
NC		 2284 /* Don't skip multiple end-of-line characters, because that breaks support
2285 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2286 characters but isn't. Instead just skip one end of line character and
2287 return the character skipped so that the caller can re-insert it if
2288 necessary. */
40a4d956 2289 return *input_line_pointer++;
252b5132
RH		 2290}
2291
fea17916 2292/* Define a macro. This is an interface to macro.c. */
252b5132
RH		 2293
2294void
39e6acbd 2295s_macro (int ignore ATTRIBUTE_UNUSED)
252b5132 2296{
40a4d956 2297 char *file, *eol;
252b5132
RH		 2298 unsigned int line;
2299 sb s;
252b5132
RH		 2300 const char *err;
2301 const char *name;
2302
2303 as_where (&file, &line);
2304
2305 sb_new (&s);
40a4d956
JB		 2306 eol = find_end_of_line (input_line_pointer, 0);
2307 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2308 input_line_pointer = eol;
252b5132 2309
252b5132 2310 if (line_label != NULL)
360e86f1
JB		 2311 {
2312 sb label;
252b5132 2313
360e86f1
JB		 2314 sb_new (&label);
2315 sb_add_string (&label, S_GET_NAME (line_label));
2316 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2317 sb_kill (&label);
2318 }
2319 else
2320 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
252b5132 2321 if (err != NULL)
02ddf156 2322 as_bad_where (file, line, err, name);
252b5132
RH		 2323 else
2324 {
2325 if (line_label != NULL)
2326 {
5e75c3ab 2327 S_SET_SEGMENT (line_label, absolute_section);
252b5132 2328 S_SET_VALUE (line_label, 0);
2b47531b 2329 symbol_set_frag (line_label, &zero_address_frag);
252b5132
RH		 2330 }
2331
abd63a32 2332 if (((NO_PSEUDO_DOT || flag_m68k_mri)
252b5132 2333 && hash_find (po_hash, name) != NULL)
041ff4dd 2334 || (!flag_m68k_mri
252b5132
RH		 2335 && *name == '.'
2336 && hash_find (po_hash, name + 1) != NULL))
02ddf156
JB		 2337 as_warn_where (file,
2338 line,
2339 _("attempt to redefine pseudo-op `%s' ignored"),
252b5132
RH		 2340 name);
2341 }
2342
2343 sb_kill (&s);
2344}
2345
2346/* Handle the .mexit pseudo-op, which immediately exits a macro
2347 expansion. */
2348
2349void
39e6acbd 2350s_mexit (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2351{
2352 cond_exit_macro (macro_nest);
2353 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2354}
2355
2356/* Switch in and out of MRI mode. */
2357
2358void
39e6acbd 2359s_mri (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2360{
2361 int on, old_flag;
2362
2363 on = get_absolute_expression ();
2364 old_flag = flag_mri;
2365 if (on != 0)
2366 {
2367 flag_mri = 1;
2368#ifdef TC_M68K
2369 flag_m68k_mri = 1;
2370#endif
2371 macro_mri_mode (1);
2372 }
2373 else
2374 {
2375 flag_mri = 0;
abd63a32 2376#ifdef TC_M68K
252b5132 2377 flag_m68k_mri = 0;
abd63a32 2378#endif
252b5132
RH		 2379 macro_mri_mode (0);
2380 }
2381
2382 /* Operator precedence changes in m68k MRI mode, so we need to
2383 update the operator rankings. */
2384 expr_set_precedence ();
2385
2386#ifdef MRI_MODE_CHANGE
2387 if (on != old_flag)
2388 MRI_MODE_CHANGE (on);
2389#endif
2390
2391 demand_empty_rest_of_line ();
2392}
2393
2394/* Handle changing the location counter. */
2395
2396static void
39e6acbd 2397do_org (segT segment, expressionS *exp, int fill)
252b5132
RH		 2398{
2399 if (segment != now_seg && segment != absolute_section)
0e389e77 2400 as_bad (_("invalid segment \"%s\""), segment_name (segment));
252b5132
RH		 2401
2402 if (now_seg == absolute_section)
2403 {
2404 if (fill != 0)
2405 as_warn (_("ignoring fill value in absolute section"));
2406 if (exp->X_op != O_constant)
2407 {
2408 as_bad (_("only constant offsets supported in absolute section"));
2409 exp->X_add_number = 0;
2410 }
2411 abs_section_offset = exp->X_add_number;
2412 }
2413 else
2414 {
2415 char *p;
2289f85d
AM		 2416 symbolS *sym = exp->X_add_symbol;
2417 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
252b5132 2418
2289f85d
AM		 2419 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2420 {
2421 /* Handle complex expressions. */
2422 sym = make_expr_symbol (exp);
2423 off = 0;
2424 }
2425
2426 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
252b5132
RH		 2427 *p = fill;
2428 }
2429}
2430
041ff4dd 2431void
39e6acbd 2432s_org (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2433{
2434 register segT segment;
2435 expressionS exp;
2436 register long temp_fill;
2437
2438#ifdef md_flush_pending_output
2439 md_flush_pending_output ();
2440#endif
2441
2442 /* The m68k MRI assembler has a different meaning for .org. It
2443 means to create an absolute section at a given address. We can't
2444 support that--use a linker script instead. */
2445 if (flag_m68k_mri)
2446 {
2447 as_bad (_("MRI style ORG pseudo-op not supported"));
2448 ignore_rest_of_line ();
2449 return;
2450 }
2451
2452 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2453 thing as a sub-segment-relative origin. Any absolute origin is
2454 given a warning, then assumed to be segment-relative. Any
2455 segmented origin expression ("foo+42") had better be in the right
2456 segment or the .org is ignored.
2457
2458 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2459 we never know sub-segment sizes when we are reading code. BSD
2460 will crash trying to emit negative numbers of filler bytes in
2461 certain .orgs. We don't crash, but see as-write for that code.
2462
2463 Don't make frag if need_pass_2==1. */
2464 segment = get_known_segmented_expression (&exp);
2465 if (*input_line_pointer == ',')
2466 {
2467 input_line_pointer++;
2468 temp_fill = get_absolute_expression ();
2469 }
2470 else
2471 temp_fill = 0;
2472
2473 if (!need_pass_2)
2474 do_org (segment, &exp, temp_fill);
2475
2476 demand_empty_rest_of_line ();
041ff4dd 2477}
252b5132
RH		 2478
2479/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2480 called by the obj-format routine which handles section changing
2481 when in MRI mode. It will create a new section, and return it. It
2482 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
7be1c489 2483 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
252b5132
RH		 2484
2485void
39e6acbd 2486s_mri_sect (char *type ATTRIBUTE_UNUSED)
252b5132
RH		 2487{
2488#ifdef TC_M68K
2489
2490 char *name;
2491 char c;
2492 segT seg;
2493
2494 SKIP_WHITESPACE ();
041ff4dd 2495
252b5132 2496 name = input_line_pointer;
3882b010 2497 if (!ISDIGIT (*name))
252b5132
RH		 2498 c = get_symbol_end ();
2499 else
2500 {
2501 do
2502 {
2503 ++input_line_pointer;
2504 }
3882b010 2505 while (ISDIGIT (*input_line_pointer));
f0e652b4 2506
252b5132
RH		 2507 c = *input_line_pointer;
2508 *input_line_pointer = '\0';
2509 }
2510
2511 name = xstrdup (name);
2512
2513 *input_line_pointer = c;
2514
2515 seg = subseg_new (name, 0);
2516
2517 if (*input_line_pointer == ',')
2518 {
2519 int align;
2520
2521 ++input_line_pointer;
2522 align = get_absolute_expression ();
2523 record_alignment (seg, align);
2524 }
2525
2526 *type = 'C';
2527 if (*input_line_pointer == ',')
2528 {
2529 c = *++input_line_pointer;
3882b010 2530 c = TOUPPER (c);
252b5132
RH		 2531 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2532 *type = c;
2533 else
2534 as_bad (_("unrecognized section type"));
2535 ++input_line_pointer;
2536
252b5132
RH		 2537 {
2538 flagword flags;
2539
2540 flags = SEC_NO_FLAGS;
2541 if (*type == 'C')
2542 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2543 else if (*type == 'D' || *type == 'M')
2544 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2545 else if (*type == 'R')
2546 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2547 if (flags != SEC_NO_FLAGS)
2548 {
041ff4dd 2549 if (!bfd_set_section_flags (stdoutput, seg, flags))
252b5132
RH		 2550 as_warn (_("error setting flags for \"%s\": %s"),
2551 bfd_section_name (stdoutput, seg),
2552 bfd_errmsg (bfd_get_error ()));
2553 }
2554 }
252b5132
RH		 2555 }
2556
2557 /* Ignore the HP type. */
2558 if (*input_line_pointer == ',')
2559 input_line_pointer += 2;
2560
2561 demand_empty_rest_of_line ();
2562
2563#else /* ! TC_M68K */
2564#ifdef TC_I960
2565
2566 char *name;
2567 char c;
2568 segT seg;
2569
2570 SKIP_WHITESPACE ();
2571
2572 name = input_line_pointer;
2573 c = get_symbol_end ();
2574
2575 name = xstrdup (name);
2576
2577 *input_line_pointer = c;
2578
2579 seg = subseg_new (name, 0);
2580
2581 if (*input_line_pointer != ',')
2582 *type = 'C';
2583 else
2584 {
2585 char *sectype;
2586
2587 ++input_line_pointer;
2588 SKIP_WHITESPACE ();
2589 sectype = input_line_pointer;
2590 c = get_symbol_end ();
2591 if (*sectype == '\0')
2592 *type = 'C';
2593 else if (strcasecmp (sectype, "text") == 0)
2594 *type = 'C';
2595 else if (strcasecmp (sectype, "data") == 0)
2596 *type = 'D';
2597 else if (strcasecmp (sectype, "romdata") == 0)
2598 *type = 'R';
2599 else
2600 as_warn (_("unrecognized section type `%s'"), sectype);
2601 *input_line_pointer = c;
2602 }
2603
2604 if (*input_line_pointer == ',')
2605 {
2606 char *seccmd;
2607
2608 ++input_line_pointer;
2609 SKIP_WHITESPACE ();
2610 seccmd = input_line_pointer;
2611 c = get_symbol_end ();
2612 if (strcasecmp (seccmd, "absolute") == 0)
2613 {
2614 as_bad (_("absolute sections are not supported"));
2615 *input_line_pointer = c;
2616 ignore_rest_of_line ();
2617 return;
2618 }
2619 else if (strcasecmp (seccmd, "align") == 0)
2620 {
2621 int align;
2622
2623 *input_line_pointer = c;
2624 align = get_absolute_expression ();
2625 record_alignment (seg, align);
2626 }
2627 else
2628 {
2629 as_warn (_("unrecognized section command `%s'"), seccmd);
2630 *input_line_pointer = c;
2631 }
2632 }
2633
041ff4dd 2634 demand_empty_rest_of_line ();
252b5132
RH		 2635
2636#else /* ! TC_I960 */
2637 /* The MRI assembler seems to use different forms of .sect for
2638 different targets. */
2639 as_bad ("MRI mode not supported for this target");
2640 ignore_rest_of_line ();
2641#endif /* ! TC_I960 */
2642#endif /* ! TC_M68K */
2643}
2644
2645/* Handle the .print pseudo-op. */
2646
2647void
39e6acbd 2648s_print (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2649{
2650 char *s;
2651 int len;
2652
2653 s = demand_copy_C_string (&len);
d6415f6c
AM		 2654 if (s != NULL)
2655 printf ("%s\n", s);
252b5132
RH		 2656 demand_empty_rest_of_line ();
2657}
2658
2659/* Handle the .purgem pseudo-op. */
2660
2661void
39e6acbd 2662s_purgem (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2663{
2664 if (is_it_end_of_statement ())
2665 {
2666 demand_empty_rest_of_line ();
2667 return;
2668 }
2669
2670 do
2671 {
2672 char *name;
2673 char c;
2674
2675 SKIP_WHITESPACE ();
2676 name = input_line_pointer;
2677 c = get_symbol_end ();
2678 delete_macro (name);
2679 *input_line_pointer = c;
2680 SKIP_WHITESPACE ();
2681 }
2682 while (*input_line_pointer++ == ',');
2683
2684 --input_line_pointer;
2685 demand_empty_rest_of_line ();
2686}
2687
057f53c1 2688/* Handle the .endm/.endr pseudo-ops. */
252b5132 2689
057f53c1
JB		 2690static void
2691s_bad_end (int endr)
7f28ab9d 2692{
057f53c1
JB		 2693 as_warn (_(".end%c encountered without preceeding %s"),
2694 endr ? 'r' : 'm',
2695 endr ? ".rept, .irp, or .irpc" : ".macro");
7f28ab9d
NC		 2696 demand_empty_rest_of_line ();
2697}
2698
2699/* Handle the .rept pseudo-op. */
2700
252b5132 2701void
39e6acbd 2702s_rept (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2703{
2704 int count;
252b5132
RH		 2705
2706 count = get_absolute_expression ();
2707
041ff4dd 2708 do_repeat (count, "REPT", "ENDR");
6dc19fc4
TW		 2709}
2710
2711/* This function provides a generic repeat block implementation. It allows
041ff4dd 2712 different directives to be used as the start/end keys. */
6dc19fc4
TW		 2713
2714void
39e6acbd 2715do_repeat (int count, const char *start, const char *end)
6dc19fc4
TW		 2716{
2717 sb one;
2718 sb many;
2719
252b5132 2720 sb_new (&one);
041ff4dd 2721 if (!buffer_and_nest (start, end, &one, get_line_sb))
252b5132 2722 {
6dc19fc4 2723 as_bad (_("%s without %s"), start, end);
252b5132
RH		 2724 return;
2725 }
2726
2727 sb_new (&many);
2728 while (count-- > 0)
2729 sb_add_sb (&many, &one);
2730
2731 sb_kill (&one);
2732
9f10757c 2733 input_scrub_include_sb (&many, input_line_pointer, 1);
252b5132
RH		 2734 sb_kill (&many);
2735 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2736}
2737
6dc19fc4
TW		 2738/* Skip to end of current repeat loop; EXTRA indicates how many additional
2739 input buffers to skip. Assumes that conditionals preceding the loop end
041ff4dd 2740 are properly nested.
6dc19fc4
TW		 2741
2742 This function makes it easier to implement a premature "break" out of the
2743 loop. The EXTRA arg accounts for other buffers we might have inserted,
041ff4dd 2744 such as line substitutions. */
6dc19fc4
TW		 2745
2746void
39e6acbd 2747end_repeat (int extra)
6dc19fc4
TW		 2748{
2749 cond_exit_macro (macro_nest);
2750 while (extra-- >= 0)
2751 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2752}
2753
be95a9c1 2754static void
9497f5ac 2755assign_symbol (char *name, int mode)
be95a9c1
AM		 2756{
2757 symbolS *symbolP;
2758
2759 if (name[0] == '.' && name[1] == '\0')
2760 {
2761 /* Turn '. = mumble' into a .org mumble. */
2762 segT segment;
2763 expressionS exp;
2764
2765 segment = get_known_segmented_expression (&exp);
2766
2767 if (!need_pass_2)
2768 do_org (segment, &exp, 0);
2769
2770 return;
2771 }
2772
2773 if ((symbolP = symbol_find (name)) == NULL
2774 && (symbolP = md_undefined_symbol (name)) == NULL)
2775 {
2776 symbolP = symbol_find_or_make (name);
2777#ifndef NO_LISTING
2778 /* When doing symbol listings, play games with dummy fragments living
2779 outside the normal fragment chain to record the file and line info
2780 for this symbol. */
2781 if (listing & LISTING_SYMBOLS)
2782 {
2783 extern struct list_info_struct *listing_tail;
31d20a21 2784 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
be95a9c1
AM		 2785 dummy_frag->line = listing_tail;
2786 dummy_frag->fr_symbol = symbolP;
2787 symbol_set_frag (symbolP, dummy_frag);
2788 }
2789#endif
31d20a21
AM		 2790#ifdef OBJ_COFF
2791 /* "set" symbols are local unless otherwise specified. */
2792 SF_SET_LOCAL (symbolP);
be95a9c1
AM		 2793#endif
2794 }
2795
9497f5ac
NC		 2796 if (S_IS_DEFINED (symbolP))
2797 {
2798 /* Permit register names to be redefined. */
2799 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
2800 && S_GET_SEGMENT (symbolP) != reg_section)
2801 {
2802 as_bad (_("symbol `%s' is already defined"), name);
2803 symbolP = symbol_clone (symbolP, 0);
2804 }
2805 /* If the symbol is volatile, copy the symbol and replace the
2806 original with the copy, so that previous uses of the symbol will
2807 retain the value of the symbol at the point of use. */
2808 else if (S_IS_VOLATILE (symbolP)
2809 /* This could be avoided when the symbol wasn't used so far, but
2810 the comment in struc-symbol.h says this flag isn't reliable. */
2811 && (1 || symbol_used_p (symbolP)))
2812 symbolP = symbol_clone (symbolP, 1);
2813 }
2814
2815 if (mode == 0)
2816 S_SET_VOLATILE (symbolP);
2817 else if (mode < 0)
2818 S_SET_FORWARD_REF (symbolP);
be95a9c1
AM		 2819
2820 pseudo_set (symbolP);
be95a9c1
AM		 2821}
2822
9497f5ac
NC		 2823/* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
2824 then this is .equiv, and it is an error if the symbol is already
2825 defined. If EQUIV is -1, the symbol additionally is a forward
2826 reference. */
252b5132 2827
041ff4dd 2828void
39e6acbd 2829s_set (int equiv)
252b5132 2830{
be95a9c1
AM		 2831 char *name;
2832 char delim;
2833 char *end_name;
252b5132 2834
041ff4dd
NC		 2835 /* Especial apologies for the random logic:
2836 this just grew, and could be parsed much more simply!
2837 Dean in haste. */
252b5132
RH		 2838 name = input_line_pointer;
2839 delim = get_symbol_end ();
2840 end_name = input_line_pointer;
0e389e77 2841 *end_name = delim;
409d19c4 2842
0e389e77 2843 if (name == end_name)
409d19c4
AM		 2844 {
2845 as_bad (_("expected symbol name"));
40a4d956 2846 ignore_rest_of_line ();
409d19c4
AM		 2847 return;
2848 }
2849
252b5132
RH		 2850 SKIP_WHITESPACE ();
2851
2852 if (*input_line_pointer != ',')
2853 {
2854 *end_name = 0;
0e389e77 2855 as_bad (_("expected comma after \"%s\""), name);
252b5132
RH		 2856 *end_name = delim;
2857 ignore_rest_of_line ();
2858 return;
2859 }
2860
2861 input_line_pointer++;
2862 *end_name = 0;
2863
be95a9c1 2864 assign_symbol (name, equiv);
252b5132 2865 *end_name = delim;
31d20a21
AM		 2866
2867 demand_empty_rest_of_line ();
041ff4dd 2868}
252b5132 2869
041ff4dd 2870void
39e6acbd 2871s_space (int mult)
252b5132
RH		 2872{
2873 expressionS exp;
2874 expressionS val;
2875 char *p = 0;
2876 char *stop = NULL;
2877 char stopc;
2878 int bytes;
2879
2880#ifdef md_flush_pending_output
2881 md_flush_pending_output ();
2882#endif
2883
2884 if (flag_mri)
2885 stop = mri_comment_field (&stopc);
2886
2887 /* In m68k MRI mode, we need to align to a word boundary, unless
2888 this is ds.b. */
2889 if (flag_m68k_mri && mult > 1)
2890 {
2891 if (now_seg == absolute_section)
2892 {
2893 abs_section_offset += abs_section_offset & 1;
2894 if (line_label != NULL)
2895 S_SET_VALUE (line_label, abs_section_offset);
2896 }
2897 else if (mri_common_symbol != NULL)
2898 {
2899 valueT val;
2900
2901 val = S_GET_VALUE (mri_common_symbol);
2902 if ((val & 1) != 0)
2903 {
2904 S_SET_VALUE (mri_common_symbol, val + 1);
2905 if (line_label != NULL)
2906 {
2b47531b
ILT		 2907 expressionS *symexp;
2908
2909 symexp = symbol_get_value_expression (line_label);
2910 know (symexp->X_op == O_symbol);
2911 know (symexp->X_add_symbol == mri_common_symbol);
2912 symexp->X_add_number += 1;
252b5132
RH		 2913 }
2914 }
2915 }
2916 else
2917 {
2918 do_align (1, (char *) NULL, 0, 0);
2919 if (line_label != NULL)
2920 {
2b47531b 2921 symbol_set_frag (line_label, frag_now);
252b5132
RH		 2922 S_SET_VALUE (line_label, frag_now_fix ());
2923 }
2924 }
2925 }
2926
2927 bytes = mult;
2928
2929 expression (&exp);
2930
2931 SKIP_WHITESPACE ();
2932 if (*input_line_pointer == ',')
2933 {
2934 ++input_line_pointer;
2935 expression (&val);
2936 }
2937 else
2938 {
2939 val.X_op = O_constant;
2940 val.X_add_number = 0;
2941 }
2942
2943 if (val.X_op != O_constant
2944 || val.X_add_number < - 0x80
2945 || val.X_add_number > 0xff
2946 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2947 {
9497f5ac 2948 resolve_expression (&exp);
252b5132 2949 if (exp.X_op != O_constant)
0e389e77 2950 as_bad (_("unsupported variable size or fill value"));
252b5132
RH		 2951 else
2952 {
2953 offsetT i;
2954
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);
2960 }
2961 }
2962 else
2963 {
9497f5ac
NC		 2964 if (now_seg == absolute_section || mri_common_symbol != NULL)
2965 resolve_expression (&exp);
2966
252b5132
RH		 2967 if (exp.X_op == O_constant)
2968 {
2969 long repeat;
2970
2971 repeat = exp.X_add_number;
2972 if (mult)
2973 repeat *= mult;
2974 bytes = repeat;
2975 if (repeat <= 0)
2976 {
2d150871
RO		 2977 if (!flag_mri)
2978 as_warn (_(".space repeat count is zero, ignored"));
2979 else if (repeat < 0)
252b5132
RH		 2980 as_warn (_(".space repeat count is negative, ignored"));
2981 goto getout;
2982 }
2983
2984 /* If we are in the absolute section, just bump the offset. */
2985 if (now_seg == absolute_section)
2986 {
2987 abs_section_offset += repeat;
2988 goto getout;
2989 }
2990
2991 /* If we are secretly in an MRI common section, then
2992 creating space just increases the size of the common
2993 symbol. */
2994 if (mri_common_symbol != NULL)
2995 {
2996 S_SET_VALUE (mri_common_symbol,
2997 S_GET_VALUE (mri_common_symbol) + repeat);
2998 goto getout;
2999 }
3000
3001 if (!need_pass_2)
3002 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3003 (offsetT) repeat, (char *) 0);
3004 }
3005 else
3006 {
3007 if (now_seg == absolute_section)
3008 {
3009 as_bad (_("space allocation too complex in absolute section"));
3010 subseg_set (text_section, 0);
3011 }
f0e652b4 3012
252b5132
RH		 3013 if (mri_common_symbol != NULL)
3014 {
3015 as_bad (_("space allocation too complex in common section"));
3016 mri_common_symbol = NULL;
3017 }
f0e652b4 3018
252b5132
RH		 3019 if (!need_pass_2)
3020 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3021 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3022 }
3023
3024 if (p)
3025 *p = val.X_add_number;
3026 }
3027
3028 getout:
3029
3030 /* In MRI mode, after an odd number of bytes, we must align to an
3031 even word boundary, unless the next instruction is a dc.b, ds.b
3032 or dcb.b. */
3033 if (flag_mri && (bytes & 1) != 0)
3034 mri_pending_align = 1;
3035
3036 demand_empty_rest_of_line ();
3037
3038 if (flag_mri)
3039 mri_comment_end (stop, stopc);
3040}
3041
3042/* This is like s_space, but the value is a floating point number with
3043 the given precision. This is for the MRI dcb.s pseudo-op and
3044 friends. */
3045
3046void
39e6acbd 3047s_float_space (int float_type)
252b5132
RH		 3048{
3049 offsetT count;
3050 int flen;
3051 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3052 char *stop = NULL;
3053 char stopc;
3054
3055 if (flag_mri)
3056 stop = mri_comment_field (&stopc);
3057
3058 count = get_absolute_expression ();
3059
3060 SKIP_WHITESPACE ();
3061 if (*input_line_pointer != ',')
3062 {
3063 as_bad (_("missing value"));
3064 ignore_rest_of_line ();
3065 if (flag_mri)
3066 mri_comment_end (stop, stopc);
3067 return;
3068 }
3069
3070 ++input_line_pointer;
3071
3072 SKIP_WHITESPACE ();
3073
3074 /* Skip any 0{letter} that may be present. Don't even check if the
3075 * letter is legal. */
3076 if (input_line_pointer[0] == '0'
3882b010 3077 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 3078 input_line_pointer += 2;
3079
3080 /* Accept :xxxx, where the x's are hex digits, for a floating point
3081 with the exact digits specified. */
3082 if (input_line_pointer[0] == ':')
3083 {
3084 flen = hex_float (float_type, temp);
3085 if (flen < 0)
3086 {
3087 ignore_rest_of_line ();
3088 if (flag_mri)
3089 mri_comment_end (stop, stopc);
3090 return;
3091 }
3092 }
3093 else
3094 {
3095 char *err;
3096
3097 err = md_atof (float_type, temp, &flen);
3098 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3099 know (flen > 0);
3100 if (err)
3101 {
0e389e77 3102 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 3103 ignore_rest_of_line ();
3104 if (flag_mri)
3105 mri_comment_end (stop, stopc);
3106 return;
3107 }
3108 }
3109
3110 while (--count >= 0)
3111 {
3112 char *p;
3113
3114 p = frag_more (flen);
3115 memcpy (p, temp, (unsigned int) flen);
3116 }
3117
3118 demand_empty_rest_of_line ();
3119
3120 if (flag_mri)
3121 mri_comment_end (stop, stopc);
3122}
3123
3124/* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3125
3126void
39e6acbd 3127s_struct (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 3128{
3129 char *stop = NULL;
3130 char stopc;
3131
3132 if (flag_mri)
3133 stop = mri_comment_field (&stopc);
3134 abs_section_offset = get_absolute_expression ();
3135 subseg_set (absolute_section, 0);
3136 demand_empty_rest_of_line ();
3137 if (flag_mri)
3138 mri_comment_end (stop, stopc);
3139}
3140
3141void
39e6acbd 3142s_text (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 3143{
3144 register int temp;
3145
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
041ff4dd 3152}
252b5132 3153\f
c95b35a9
NS		 3154
3155/* Verify that we are at the end of a line. If not, issue an error and
3156 skip to EOL. */
3157
041ff4dd 3158void
39e6acbd 3159demand_empty_rest_of_line (void)
252b5132
RH		 3160{
3161 SKIP_WHITESPACE ();
3162 if (is_end_of_line[(unsigned char) *input_line_pointer])
041ff4dd 3163 input_line_pointer++;
252b5132 3164 else
252b5132 3165 {
3882b010 3166 if (ISPRINT (*input_line_pointer))
c95b35a9 3167 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
0e389e77 3168 *input_line_pointer);
252b5132 3169 else
c95b35a9 3170 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
0e389e77 3171 *input_line_pointer);
c95b35a9 3172 ignore_rest_of_line ();
252b5132 3173 }
c95b35a9
NS		 3174
3175 /* Return pointing just after end-of-line. */
3176 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3177}
3178
3179/* Silently advance to the end of line. Use this after already having
3180 issued an error about something bad. */
3181
3182void
3183ignore_rest_of_line (void)
3184{
3185 while (input_line_pointer < buffer_limit
3186 && !is_end_of_line[(unsigned char) *input_line_pointer])
3187 input_line_pointer++;
f0e652b4 3188
041ff4dd
NC		 3189 input_line_pointer++;
3190
3191 /* Return pointing just after end-of-line. */
252b5132
RH		 3192 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3193}
3194
be95a9c1
AM		 3195/* Sets frag for given symbol to zero_address_frag, except when the
3196 symbol frag is already set to a dummy listing frag. */
3197
3198static void
3199set_zero_frag (symbolS *symbolP)
3200{
3201 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3202 symbol_set_frag (symbolP, &zero_address_frag);
3203}
3204
041ff4dd 3205/* In: Pointer to a symbol.
d6415f6c 3206 Input_line_pointer->expression.
f0e652b4 3207
041ff4dd 3208 Out: Input_line_pointer->just after any whitespace after expression.
d6415f6c
AM		 3209 Tried to set symbol to value of expression.
3210 Will change symbols type, value, and frag; */
041ff4dd 3211
252b5132 3212void
39e6acbd 3213pseudo_set (symbolS *symbolP)
252b5132
RH		 3214{
3215 expressionS exp;
be95a9c1 3216 segT seg;
252b5132 3217
041ff4dd 3218 know (symbolP); /* NULL pointer is logic error. */
252b5132 3219
9497f5ac
NC		 3220 if (!S_IS_FORWARD_REF (symbolP))
3221 (void) expression (&exp);
3222 else
3223 (void) deferred_expression (&exp);
252b5132
RH		 3224
3225 if (exp.X_op == O_illegal)
0e389e77 3226 as_bad (_("illegal expression"));
252b5132 3227 else if (exp.X_op == O_absent)
0e389e77 3228 as_bad (_("missing expression"));
252b5132
RH		 3229 else if (exp.X_op == O_big)
3230 {
3231 if (exp.X_add_number > 0)
0e389e77 3232 as_bad (_("bignum invalid"));
252b5132 3233 else
0e389e77 3234 as_bad (_("floating point number invalid"));
252b5132
RH		 3235 }
3236 else if (exp.X_op == O_subtract
9497f5ac 3237 && !S_IS_FORWARD_REF (symbolP)
252b5132 3238 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2b47531b
ILT		 3239 && (symbol_get_frag (exp.X_add_symbol)
3240 == symbol_get_frag (exp.X_op_symbol)))
252b5132
RH		 3241 {
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));
3245 }
3246
be95a9c1
AM		 3247 if (symbol_section_p (symbolP))
3248 {
3249 as_bad ("attempt to set value of section symbol");
3250 return;
3251 }
be95a9c1 3252
252b5132
RH		 3253 switch (exp.X_op)
3254 {
3255 case O_illegal:
3256 case O_absent:
3257 case O_big:
3258 exp.X_add_number = 0;
3259 /* Fall through. */
3260 case O_constant:
3261 S_SET_SEGMENT (symbolP, absolute_section);
252b5132 3262 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3263 set_zero_frag (symbolP);
252b5132
RH		 3264 break;
3265
3266 case O_register:
3267 S_SET_SEGMENT (symbolP, reg_section);
3268 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3269 set_zero_frag (symbolP);
252b5132
RH		 3270 break;
3271
3272 case O_symbol:
be95a9c1
AM		 3273 seg = S_GET_SEGMENT (exp.X_add_symbol);
3274 /* For x=undef+const, create an expression symbol.
3275 For x=x+const, just update x except when x is an undefined symbol
3276 For x=defined+const, evaluate x. */
3277 if (symbolP == exp.X_add_symbol
3278 && (seg != undefined_section
3279 || !symbol_constant_p (symbolP)))
3280 {
3281 *symbol_X_add_number (symbolP) += exp.X_add_number;
3282 break;
3283 }
9497f5ac 3284 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
252b5132
RH		 3285 {
3286 symbolS *s = exp.X_add_symbol;
3287
60938e80
L		 3288 if (S_IS_COMMON (s))
3289 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3290 S_GET_NAME (symbolP), S_GET_NAME (s));
3291
be95a9c1
AM		 3292 S_SET_SEGMENT (symbolP, seg);
3293 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
2b47531b 3294 symbol_set_frag (symbolP, symbol_get_frag (s));
252b5132 3295 copy_symbol_attributes (symbolP, s);
be95a9c1 3296 break;
252b5132 3297 }
66bd02d3
AM		 3298 S_SET_SEGMENT (symbolP, undefined_section);
3299 symbol_set_value_expression (symbolP, &exp);
3300 set_zero_frag (symbolP);
3301 break;
252b5132
RH		 3302
3303 default:
aba4aa7d
AM		 3304 /* The value is some complex expression. */
3305 S_SET_SEGMENT (symbolP, expr_section);
2b47531b 3306 symbol_set_value_expression (symbolP, &exp);
be95a9c1 3307 set_zero_frag (symbolP);
252b5132
RH		 3308 break;
3309 }
3310}
3311\f
d6415f6c 3312/* cons()
f0e652b4 3313
041ff4dd
NC		 3314 CONStruct more frag of .bytes, or .words etc.
3315 Should need_pass_2 be 1 then emit no frag(s).
3316 This understands EXPRESSIONS.
f0e652b4 3317
041ff4dd 3318 Bug (?)
f0e652b4 3319
041ff4dd
NC		 3320 This has a split personality. We use expression() to read the
3321 value. We can detect if the value won't fit in a byte or word.
3322 But we can't detect if expression() discarded significant digits
3323 in the case of a long. Not worth the crocks required to fix it. */
252b5132
RH		 3324
3325/* Select a parser for cons expressions. */
3326
3327/* Some targets need to parse the expression in various fancy ways.
3328 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3329 (for example, the HPPA does this). Otherwise, you can define
3330 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3331 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3332 are defined, which is the normal case, then only simple expressions
3333 are permitted. */
3334
abd63a32 3335#ifdef TC_M68K
252b5132 3336static void
39e6acbd 3337parse_mri_cons (expressionS *exp, unsigned int nbytes);
abd63a32 3338#endif
252b5132
RH		 3339
3340#ifndef TC_PARSE_CONS_EXPRESSION
3341#ifdef BITFIELD_CONS_EXPRESSIONS
3342#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
041ff4dd 3343static void
39e6acbd 3344parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3345#endif
3346#ifdef REPEAT_CONS_EXPRESSIONS
3347#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3348static void
39e6acbd 3349parse_repeat_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3350#endif
3351
3352/* If we haven't gotten one yet, just call expression. */
3353#ifndef TC_PARSE_CONS_EXPRESSION
3354#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3355#endif
3356#endif
3357
cdfbf930 3358void
b41b1f95
L		 3359do_parse_cons_expression (expressionS *exp,
3360 int nbytes ATTRIBUTE_UNUSED)
cdfbf930
RH		 3361{
3362 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3363}
3364
3365
041ff4dd
NC		 3366/* Worker to do .byte etc statements.
3367 Clobbers input_line_pointer and checks end-of-line. */
3368
3369static void
39e6acbd
KH		 3370cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3371 int rva)
252b5132
RH		 3372{
3373 int c;
3374 expressionS exp;
3375 char *stop = NULL;
3376 char stopc;
3377
3378#ifdef md_flush_pending_output
3379 md_flush_pending_output ();
3380#endif
3381
3382 if (flag_mri)
3383 stop = mri_comment_field (&stopc);
3384
3385 if (is_it_end_of_statement ())
3386 {
3387 demand_empty_rest_of_line ();
3388 if (flag_mri)
3389 mri_comment_end (stop, stopc);
3390 return;
3391 }
3392
cc1bc22a
AM		 3393#ifdef TC_ADDRESS_BYTES
3394 if (nbytes == 0)
3395 nbytes = TC_ADDRESS_BYTES ();
3396#endif
3397
252b5132
RH		 3398#ifdef md_cons_align
3399 md_cons_align (nbytes);
3400#endif
3401
3402 c = 0;
3403 do
3404 {
abd63a32 3405#ifdef TC_M68K
252b5132
RH		 3406 if (flag_m68k_mri)
3407 parse_mri_cons (&exp, (unsigned int) nbytes);
3408 else
abd63a32 3409#endif
252b5132
RH		 3410 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3411
3412 if (rva)
3413 {
3414 if (exp.X_op == O_symbol)
3415 exp.X_op = O_symbol_rva;
3416 else
3417 as_fatal (_("rva without symbol"));
3418 }
3419 emit_expr (&exp, (unsigned int) nbytes);
3420 ++c;
3421 }
3422 while (*input_line_pointer++ == ',');
3423
3424 /* In MRI mode, after an odd number of bytes, we must align to an
3425 even word boundary, unless the next instruction is a dc.b, ds.b
3426 or dcb.b. */
3427 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3428 mri_pending_align = 1;
3429
041ff4dd 3430 input_line_pointer--; /* Put terminator back into stream. */
252b5132
RH		 3431
3432 demand_empty_rest_of_line ();
3433
3434 if (flag_mri)
3435 mri_comment_end (stop, stopc);
3436}
3437
252b5132 3438void
39e6acbd 3439cons (int size)
252b5132
RH		 3440{
3441 cons_worker (size, 0);
3442}
3443
041ff4dd 3444void
39e6acbd 3445s_rva (int size)
252b5132
RH		 3446{
3447 cons_worker (size, 1);
3448}
3449
3450/* Put the contents of expression EXP into the object file using
3451 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3452
3453void
39e6acbd 3454emit_expr (expressionS *exp, unsigned int nbytes)
252b5132
RH		 3455{
3456 operatorT op;
3457 register char *p;
3458 valueT extra_digit = 0;
3459
3460 /* Don't do anything if we are going to make another pass. */
3461 if (need_pass_2)
3462 return;
3463
ed7d5d1a
AM		 3464 dot_value = frag_now_fix ();
3465
252b5132
RH		 3466#ifndef NO_LISTING
3467#ifdef OBJ_ELF
3468 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3469 appear as a four byte positive constant in the .line section,
3470 followed by a 2 byte 0xffff. Look for that case here. */
3471 {
3472 static int dwarf_line = -1;
3473
3474 if (strcmp (segment_name (now_seg), ".line") != 0)
3475 dwarf_line = -1;
3476 else if (dwarf_line >= 0
3477 && nbytes == 2
3478 && exp->X_op == O_constant
3479 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3480 listing_source_line ((unsigned int) dwarf_line);
3481 else if (nbytes == 4
3482 && exp->X_op == O_constant
3483 && exp->X_add_number >= 0)
3484 dwarf_line = exp->X_add_number;
3485 else
3486 dwarf_line = -1;
3487 }
3488
3489 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3490 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3491 AT_sibling (0x12) followed by a four byte address of the sibling
3492 followed by a 2 byte AT_name (0x38) followed by the name of the
3493 file. We look for that case here. */
3494 {
3495 static int dwarf_file = 0;
3496
3497 if (strcmp (segment_name (now_seg), ".debug") != 0)
3498 dwarf_file = 0;
3499 else if (dwarf_file == 0
3500 && nbytes == 2
3501 && exp->X_op == O_constant
3502 && exp->X_add_number == 0x11)
3503 dwarf_file = 1;
3504 else if (dwarf_file == 1
3505 && nbytes == 2
3506 && exp->X_op == O_constant
3507 && exp->X_add_number == 0x12)
3508 dwarf_file = 2;
3509 else if (dwarf_file == 2
3510 && nbytes == 4)
3511 dwarf_file = 3;
3512 else if (dwarf_file == 3
3513 && nbytes == 2
3514 && exp->X_op == O_constant
3515 && exp->X_add_number == 0x38)
3516 dwarf_file = 4;
3517 else
3518 dwarf_file = 0;
3519
3520 /* The variable dwarf_file_string tells stringer that the string
3521 may be the name of the source file. */
3522 if (dwarf_file == 4)
3523 dwarf_file_string = 1;
3524 else
3525 dwarf_file_string = 0;
3526 }
3527#endif
3528#endif
3529
3530 if (check_eh_frame (exp, &nbytes))
3531 return;
3532
3533 op = exp->X_op;
3534
3535 /* Allow `.word 0' in the absolute section. */
3536 if (now_seg == absolute_section)
3537 {
3538 if (op != O_constant || exp->X_add_number != 0)
3539 as_bad (_("attempt to store value in absolute section"));
3540 abs_section_offset += nbytes;
3541 return;
3542 }
3543
3544 /* Handle a negative bignum. */
3545 if (op == O_uminus
3546 && exp->X_add_number == 0
2b47531b
ILT		 3547 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3548 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
252b5132
RH		 3549 {
3550 int i;
3551 unsigned long carry;
3552
2b47531b 3553 exp = symbol_get_value_expression (exp->X_add_symbol);
252b5132
RH		 3554
3555 /* Negate the bignum: one's complement each digit and add 1. */
3556 carry = 1;
3557 for (i = 0; i < exp->X_add_number; i++)
3558 {
3559 unsigned long next;
3560
041ff4dd 3561 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
252b5132
RH		 3562 & LITTLENUM_MASK)
3563 + carry);
3564 generic_bignum[i] = next & LITTLENUM_MASK;
3565 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3566 }
3567
3568 /* We can ignore any carry out, because it will be handled by
3569 extra_digit if it is needed. */
3570
3571 extra_digit = (valueT) -1;
3572 op = O_big;
3573 }
3574
3575 if (op == O_absent || op == O_illegal)
3576 {
3577 as_warn (_("zero assumed for missing expression"));
3578 exp->X_add_number = 0;
3579 op = O_constant;
3580 }
3581 else if (op == O_big && exp->X_add_number <= 0)
3582 {
0e389e77 3583 as_bad (_("floating point number invalid"));
252b5132
RH		 3584 exp->X_add_number = 0;
3585 op = O_constant;
3586 }
3587 else if (op == O_register)
3588 {
3589 as_warn (_("register value used as expression"));
3590 op = O_constant;
3591 }
3592
3593 p = frag_more ((int) nbytes);
3594
3595#ifndef WORKING_DOT_WORD
3596 /* If we have the difference of two symbols in a word, save it on
3597 the broken_words list. See the code in write.c. */
3598 if (op == O_subtract && nbytes == 2)
3599 {
3600 struct broken_word *x;
3601
3602 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3603 x->next_broken_word = broken_words;
3604 broken_words = x;
3605 x->seg = now_seg;
3606 x->subseg = now_subseg;
3607 x->frag = frag_now;
3608 x->word_goes_here = p;
3609 x->dispfrag = 0;
3610 x->add = exp->X_add_symbol;
3611 x->sub = exp->X_op_symbol;
3612 x->addnum = exp->X_add_number;
3613 x->added = 0;
dc59a897 3614 x->use_jump = 0;
252b5132
RH		 3615 new_broken_words++;
3616 return;
3617 }
3618#endif
3619
3620 /* If we have an integer, but the number of bytes is too large to
3621 pass to md_number_to_chars, handle it as a bignum. */
3622 if (op == O_constant && nbytes > sizeof (valueT))
3623 {
e5604d79
RS		 3624 extra_digit = exp->X_unsigned ? 0 : -1;
3625 convert_to_bignum (exp);
3626 op = O_big;
252b5132
RH		 3627 }
3628
3629 if (op == O_constant)
3630 {
3631 register valueT get;
3632 register valueT use;
3633 register valueT mask;
3634 valueT hibit;
3635 register valueT unmask;
3636
3637 /* JF << of >= number of bits in the object is undefined. In
041ff4dd 3638 particular SPARC (Sun 4) has problems. */
252b5132
RH		 3639 if (nbytes >= sizeof (valueT))
3640 {
3641 mask = 0;
3642 if (nbytes > sizeof (valueT))
3643 hibit = 0;
3644 else
3645 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3646 }
3647 else
3648 {
041ff4dd 3649 /* Don't store these bits. */
252b5132
RH		 3650 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3651 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3652 }
3653
041ff4dd 3654 unmask = ~mask; /* Do store these bits. */
252b5132
RH		 3655
3656#ifdef NEVER
3657 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
041ff4dd 3658 mask = ~(unmask >> 1); /* Includes sign bit now. */
252b5132
RH		 3659#endif
3660
3661 get = exp->X_add_number;
3662 use = get & unmask;
3663 if ((get & mask) != 0
3664 && ((get & mask) != mask
3665 || (get & hibit) == 0))
041ff4dd 3666 { /* Leading bits contain both 0s & 1s. */
0e389e77 3667 as_warn (_("value 0x%lx truncated to 0x%lx"),
252b5132
RH		 3668 (unsigned long) get, (unsigned long) use);
3669 }
041ff4dd 3670 /* Put bytes in right order. */
252b5132
RH		 3671 md_number_to_chars (p, use, (int) nbytes);
3672 }
3673 else if (op == O_big)
3674 {
3675 unsigned int size;
3676 LITTLENUM_TYPE *nums;
3677
3678 know (nbytes % CHARS_PER_LITTLENUM == 0);
3679
3680 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3681 if (nbytes < size)
3682 {
0e389e77 3683 as_warn (_("bignum truncated to %d bytes"), nbytes);
252b5132
RH		 3684 size = nbytes;
3685 }
3686
3687 if (target_big_endian)
3688 {
3689 while (nbytes > size)
3690 {
3691 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3692 nbytes -= CHARS_PER_LITTLENUM;
3693 p += CHARS_PER_LITTLENUM;
3694 }
3695
3696 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
ceac3f62 3697 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 3698 {
3699 --nums;
3700 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3701 size -= CHARS_PER_LITTLENUM;
3702 p += CHARS_PER_LITTLENUM;
3703 }
3704 }
3705 else
3706 {
3707 nums = generic_bignum;
ceac3f62 3708 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 3709 {
3710 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3711 ++nums;
3712 size -= CHARS_PER_LITTLENUM;
3713 p += CHARS_PER_LITTLENUM;
3714 nbytes -= CHARS_PER_LITTLENUM;
3715 }
3716
ceac3f62 3717 while (nbytes >= CHARS_PER_LITTLENUM)
252b5132
RH		 3718 {
3719 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3720 nbytes -= CHARS_PER_LITTLENUM;
3721 p += CHARS_PER_LITTLENUM;
3722 }
3723 }
3724 }
3725 else
3726 {
3727 memset (p, 0, nbytes);
3728
7be1c489 3729 /* Now we need to generate a fixS to record the symbol value. */
252b5132 3730
252b5132
RH		 3731#ifdef TC_CONS_FIX_NEW
3732 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3733#else
3734 {
3735 bfd_reloc_code_real_type r;
3736
3737 switch (nbytes)
3738 {
3739 case 1:
3740 r = BFD_RELOC_8;
3741 break;
3742 case 2:
3743 r = BFD_RELOC_16;
3744 break;
3745 case 4:
3746 r = BFD_RELOC_32;
3747 break;
3748 case 8:
3749 r = BFD_RELOC_64;
3750 break;
3751 default:
3752 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3753 r = BFD_RELOC_32;
3754 break;
3755 }
3756 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3757 0, r);
3758 }
3759#endif
252b5132
RH		 3760 }
3761}
3762\f
3763#ifdef BITFIELD_CONS_EXPRESSIONS
3764
3765/* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3766 w:x,y:z, where w and y are bitwidths and x and y are values. They
3767 then pack them all together. We do a little better in that we allow
3768 them in words, longs, etc. and we'll pack them in target byte order
3769 for you.
3770
47eebc20 3771 The rules are: pack least significant bit first, if a field doesn't
252b5132
RH		 3772 entirely fit, put it in the next unit. Overflowing the bitfield is
3773 explicitly *not* even a warning. The bitwidth should be considered
3774 a "mask".
3775
3776 To use this function the tc-XXX.h file should define
3777 BITFIELD_CONS_EXPRESSIONS. */
3778
041ff4dd 3779static void
252b5132
RH		 3780parse_bitfield_cons (exp, nbytes)
3781 expressionS *exp;
3782 unsigned int nbytes;
3783{
3784 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3785 char *hold = input_line_pointer;
3786
3787 (void) expression (exp);
3788
3789 if (*input_line_pointer == ':')
041ff4dd
NC		 3790 {
3791 /* Bitfields. */
252b5132
RH		 3792 long value = 0;
3793
3794 for (;;)
3795 {
3796 unsigned long width;
3797
3798 if (*input_line_pointer != ':')
3799 {
3800 input_line_pointer = hold;
3801 break;
041ff4dd 3802 } /* Next piece is not a bitfield. */
252b5132
RH		 3803
3804 /* In the general case, we can't allow
3805 full expressions with symbol
3806 differences and such. The relocation
3807 entries for symbols not defined in this
3808 assembly would require arbitrary field
3809 widths, positions, and masks which most
3810 of our current object formats don't
3811 support.
3812
3813 In the specific case where a symbol
3814 *is* defined in this assembly, we
3815 *could* build fixups and track it, but
3816 this could lead to confusion for the
3817 backends. I'm lazy. I'll take any
3818 SEG_ABSOLUTE. I think that means that
3819 you can use a previous .set or
041ff4dd 3820 .equ type symbol. xoxorich. */
252b5132
RH		 3821
3822 if (exp->X_op == O_absent)
3823 {
3824 as_warn (_("using a bit field width of zero"));
3825 exp->X_add_number = 0;
3826 exp->X_op = O_constant;
041ff4dd 3827 } /* Implied zero width bitfield. */
252b5132
RH		 3828
3829 if (exp->X_op != O_constant)
3830 {
3831 *input_line_pointer = '\0';
3832 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
3833 *input_line_pointer = ':';
3834 demand_empty_rest_of_line ();
3835 return;
041ff4dd 3836 } /* Too complex. */
252b5132
RH		 3837
3838 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3839 {
3840 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3841 width, nbytes, (BITS_PER_CHAR * nbytes));
3842 width = BITS_PER_CHAR * nbytes;
041ff4dd 3843 } /* Too big. */
252b5132
RH		 3844
3845 if (width > bits_available)
3846 {
3847 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3848 input_line_pointer = hold;
3849 exp->X_add_number = value;
3850 break;
041ff4dd 3851 } /* Won't fit. */
252b5132 3852
ef99799a
KH		 3853 /* Skip ':'. */
3854 hold = ++input_line_pointer;
252b5132
RH		 3855
3856 (void) expression (exp);
3857 if (exp->X_op != O_constant)
3858 {
3859 char cache = *input_line_pointer;
3860
3861 *input_line_pointer = '\0';
3862 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
3863 *input_line_pointer = cache;
3864 demand_empty_rest_of_line ();
3865 return;
041ff4dd 3866 } /* Too complex. */
252b5132
RH		 3867
3868 value |= ((~(-1 << width) & exp->X_add_number)
3869 << ((BITS_PER_CHAR * nbytes) - bits_available));
3870
3871 if ((bits_available -= width) == 0
3872 || is_it_end_of_statement ()
3873 || *input_line_pointer != ',')
3874 {
3875 break;
041ff4dd 3876 } /* All the bitfields we're gonna get. */
252b5132
RH		 3877
3878 hold = ++input_line_pointer;
3879 (void) expression (exp);
041ff4dd 3880 }
252b5132
RH		 3881
3882 exp->X_add_number = value;
3883 exp->X_op = O_constant;
3884 exp->X_unsigned = 1;
041ff4dd
NC		 3885 }
3886}
252b5132
RH		 3887
3888#endif /* BITFIELD_CONS_EXPRESSIONS */
3889\f
3890/* Handle an MRI style string expression. */
3891
abd63a32 3892#ifdef TC_M68K
252b5132
RH		 3893static void
3894parse_mri_cons (exp, nbytes)
3895 expressionS *exp;
3896 unsigned int nbytes;
3897{
3898 if (*input_line_pointer != '\''
3899 && (input_line_pointer[1] != '\''
3900 || (*input_line_pointer != 'A'
3901 && *input_line_pointer != 'E')))
3902 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3903 else
3904 {
3905 unsigned int scan;
3906 unsigned int result = 0;
3907
3908 /* An MRI style string. Cut into as many bytes as will fit into
3909 a nbyte chunk, left justify if necessary, and separate with
3910 commas so we can try again later. */
3911 if (*input_line_pointer == 'A')
3912 ++input_line_pointer;
3913 else if (*input_line_pointer == 'E')
3914 {
3915 as_bad (_("EBCDIC constants are not supported"));
3916 ++input_line_pointer;
3917 }
3918
3919 input_line_pointer++;
3920 for (scan = 0; scan < nbytes; scan++)
3921 {
3922 if (*input_line_pointer == '\'')
3923 {
3924 if (input_line_pointer[1] == '\'')
3925 {
3926 input_line_pointer++;
3927 }
3928 else
3929 break;
3930 }
3931 result = (result << 8) | (*input_line_pointer++);
3932 }
3933
041ff4dd 3934 /* Left justify. */
252b5132
RH		 3935 while (scan < nbytes)
3936 {
3937 result <<= 8;
3938 scan++;
3939 }
f0e652b4 3940
041ff4dd 3941 /* Create correct expression. */
252b5132
RH		 3942 exp->X_op = O_constant;
3943 exp->X_add_number = result;
f0e652b4 3944
041ff4dd 3945 /* Fake it so that we can read the next char too. */
252b5132
RH		 3946 if (input_line_pointer[0] != '\'' ||
3947 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3948 {
3949 input_line_pointer -= 2;
3950 input_line_pointer[0] = ',';
3951 input_line_pointer[1] = '\'';
3952 }
3953 else
3954 input_line_pointer++;
3955 }
3956}
abd63a32 3957#endif /* TC_M68K */
252b5132
RH		 3958\f
3959#ifdef REPEAT_CONS_EXPRESSIONS
3960
3961/* Parse a repeat expression for cons. This is used by the MIPS
3962 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3963 object file COUNT times.
3964
3965 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3966
3967static void
3968parse_repeat_cons (exp, nbytes)
3969 expressionS *exp;
3970 unsigned int nbytes;
3971{
3972 expressionS count;
3973 register int i;
3974
3975 expression (exp);
3976
3977 if (*input_line_pointer != ':')
3978 {
3979 /* No repeat count. */
3980 return;
3981 }
3982
3983 ++input_line_pointer;
3984 expression (&count);
3985 if (count.X_op != O_constant
3986 || count.X_add_number <= 0)
3987 {
0e389e77 3988 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 3989 return;
3990 }
3991
3992 /* The cons function is going to output this expression once. So we
3993 output it count - 1 times. */
3994 for (i = count.X_add_number - 1; i > 0; i--)
3995 emit_expr (exp, nbytes);
3996}
3997
3998#endif /* REPEAT_CONS_EXPRESSIONS */
3999\f
4000/* Parse a floating point number represented as a hex constant. This
4001 permits users to specify the exact bits they want in the floating
4002 point number. */
4003
4004static int
39e6acbd 4005hex_float (int float_type, char *bytes)
252b5132
RH		 4006{
4007 int length;
4008 int i;
4009
4010 switch (float_type)
4011 {
4012 case 'f':
4013 case 'F':
4014 case 's':
4015 case 'S':
4016 length = 4;
4017 break;
4018
4019 case 'd':
4020 case 'D':
4021 case 'r':
4022 case 'R':
4023 length = 8;
4024 break;
4025
4026 case 'x':
4027 case 'X':
4028 length = 12;
4029 break;
4030
4031 case 'p':
4032 case 'P':
4033 length = 12;
4034 break;
4035
4036 default:
0e389e77 4037 as_bad (_("unknown floating type type '%c'"), float_type);
252b5132
RH		 4038 return -1;
4039 }
4040
4041 /* It would be nice if we could go through expression to parse the
4042 hex constant, but if we get a bignum it's a pain to sort it into
4043 the buffer correctly. */
4044 i = 0;
4045 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4046 {
4047 int d;
4048
4049 /* The MRI assembler accepts arbitrary underscores strewn about
041ff4dd 4050 through the hex constant, so we ignore them as well. */
252b5132
RH		 4051 if (*input_line_pointer == '_')
4052 {
4053 ++input_line_pointer;
4054 continue;
4055 }
4056
4057 if (i >= length)
4058 {
0e389e77 4059 as_warn (_("floating point constant too large"));
252b5132
RH		 4060 return -1;
4061 }
4062 d = hex_value (*input_line_pointer) << 4;
4063 ++input_line_pointer;
4064 while (*input_line_pointer == '_')
4065 ++input_line_pointer;
4066 if (hex_p (*input_line_pointer))
4067 {
4068 d += hex_value (*input_line_pointer);
4069 ++input_line_pointer;
4070 }
4071 if (target_big_endian)
4072 bytes[i] = d;
4073 else
4074 bytes[length - i - 1] = d;
4075 ++i;
4076 }
4077
4078 if (i < length)
4079 {
4080 if (target_big_endian)
4081 memset (bytes + i, 0, length - i);
4082 else
4083 memset (bytes, 0, length - i);
4084 }
4085
4086 return length;
4087}
4088
d6415f6c 4089/* float_cons()
f0e652b4 4090
041ff4dd
NC		 4091 CONStruct some more frag chars of .floats .ffloats etc.
4092 Makes 0 or more new frags.
4093 If need_pass_2 == 1, no frags are emitted.
4094 This understands only floating literals, not expressions. Sorry.
f0e652b4 4095
041ff4dd
NC		 4096 A floating constant is defined by atof_generic(), except it is preceded
4097 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4098 reading, I decided to be incompatible. This always tries to give you
4099 rounded bits to the precision of the pseudo-op. Former AS did premature
47eebc20 4100 truncation, restored noisy bits instead of trailing 0s AND gave you
041ff4dd
NC		 4101 a choice of 2 flavours of noise according to which of 2 floating-point
4102 scanners you directed AS to use.
f0e652b4 4103
041ff4dd 4104 In: input_line_pointer->whitespace before, or '0' of flonum. */
252b5132
RH		 4105
4106void
39e6acbd
KH		 4107float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4108 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
252b5132
RH		 4109{
4110 register char *p;
041ff4dd
NC		 4111 int length; /* Number of chars in an object. */
4112 register char *err; /* Error from scanning floating literal. */
252b5132
RH		 4113 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4114
4115 if (is_it_end_of_statement ())
4116 {
4117 demand_empty_rest_of_line ();
4118 return;
4119 }
4120
4121#ifdef md_flush_pending_output
4122 md_flush_pending_output ();
4123#endif
4124
4125 do
4126 {
041ff4dd 4127 /* input_line_pointer->1st char of a flonum (we hope!). */
252b5132
RH		 4128 SKIP_WHITESPACE ();
4129
4130 /* Skip any 0{letter} that may be present. Don't even check if the
d6415f6c
AM		 4131 letter is legal. Someone may invent a "z" format and this routine
4132 has no use for such information. Lusers beware: you get
4133 diagnostics if your input is ill-conditioned. */
252b5132 4134 if (input_line_pointer[0] == '0'
3882b010 4135 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 4136 input_line_pointer += 2;
4137
4138 /* Accept :xxxx, where the x's are hex digits, for a floating
d6415f6c 4139 point with the exact digits specified. */
252b5132
RH		 4140 if (input_line_pointer[0] == ':')
4141 {
4142 ++input_line_pointer;
4143 length = hex_float (float_type, temp);
4144 if (length < 0)
4145 {
4146 ignore_rest_of_line ();
4147 return;
4148 }
4149 }
4150 else
4151 {
4152 err = md_atof (float_type, temp, &length);
4153 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4154 know (length > 0);
4155 if (err)
4156 {
0e389e77 4157 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 4158 ignore_rest_of_line ();
4159 return;
4160 }
4161 }
4162
4163 if (!need_pass_2)
4164 {
4165 int count;
4166
4167 count = 1;
4168
4169#ifdef REPEAT_CONS_EXPRESSIONS
4170 if (*input_line_pointer == ':')
4171 {
4172 expressionS count_exp;
4173
4174 ++input_line_pointer;
4175 expression (&count_exp);
f0e652b4 4176
252b5132
RH		 4177 if (count_exp.X_op != O_constant
4178 || count_exp.X_add_number <= 0)
041ff4dd 4179 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 4180 else
4181 count = count_exp.X_add_number;
4182 }
4183#endif
4184
4185 while (--count >= 0)
4186 {
4187 p = frag_more (length);
4188 memcpy (p, temp, (unsigned int) length);
4189 }
4190 }
4191 SKIP_WHITESPACE ();
4192 }
4193 while (*input_line_pointer++ == ',');
4194
041ff4dd
NC		 4195 /* Put terminator back into stream. */
4196 --input_line_pointer;
252b5132 4197 demand_empty_rest_of_line ();
041ff4dd 4198}
252b5132 4199\f
041ff4dd 4200/* Return the size of a LEB128 value. */
252b5132
RH		 4201
4202static inline int
39e6acbd 4203sizeof_sleb128 (offsetT value)
252b5132
RH		 4204{
4205 register int size = 0;
4206 register unsigned byte;
4207
4208 do
4209 {
4210 byte = (value & 0x7f);
4211 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4212 Fortunately, we can structure things so that the extra work reduces
4213 to a noop on systems that do things "properly". */
4214 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4215 size += 1;
4216 }
4217 while (!(((value == 0) && ((byte & 0x40) == 0))
4218 || ((value == -1) && ((byte & 0x40) != 0))));
4219
4220 return size;
4221}
4222
4223static inline int
39e6acbd 4224sizeof_uleb128 (valueT value)
252b5132
RH		 4225{
4226 register int size = 0;
4227 register unsigned byte;
4228
4229 do
4230 {
4231 byte = (value & 0x7f);
4232 value >>= 7;
4233 size += 1;
4234 }
4235 while (value != 0);
4236
4237 return size;
4238}
4239
4240int
39e6acbd 4241sizeof_leb128 (valueT value, int sign)
252b5132
RH		 4242{
4243 if (sign)
4244 return sizeof_sleb128 ((offsetT) value);
4245 else
4246 return sizeof_uleb128 (value);
4247}
4248
4249/* Output a LEB128 value. */
4250
4251static inline int
39e6acbd 4252output_sleb128 (char *p, offsetT value)
252b5132
RH		 4253{
4254 register char *orig = p;
4255 register int more;
4256
4257 do
4258 {
4259 unsigned byte = (value & 0x7f);
4260
4261 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4262 Fortunately, we can structure things so that the extra work reduces
4263 to a noop on systems that do things "properly". */
4264 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4265
4266 more = !((((value == 0) && ((byte & 0x40) == 0))
4267 || ((value == -1) && ((byte & 0x40) != 0))));
4268 if (more)
4269 byte |= 0x80;
4270
4271 *p++ = byte;
4272 }
4273 while (more);
4274
4275 return p - orig;
4276}
4277
4278static inline int
39e6acbd 4279output_uleb128 (char *p, valueT value)
252b5132
RH		 4280{
4281 char *orig = p;
4282
4283 do
4284 {
4285 unsigned byte = (value & 0x7f);
4286 value >>= 7;
4287 if (value != 0)
4288 /* More bytes to follow. */
4289 byte |= 0x80;
4290
4291 *p++ = byte;
4292 }
4293 while (value != 0);
4294
4295 return p - orig;
4296}
4297
4298int
39e6acbd 4299output_leb128 (char *p, valueT value, int sign)
252b5132
RH		 4300{
4301 if (sign)
4302 return output_sleb128 (p, (offsetT) value);
4303 else
4304 return output_uleb128 (p, value);
4305}
4306
4307/* Do the same for bignums. We combine sizeof with output here in that
4308 we don't output for NULL values of P. It isn't really as critical as
4309 for "normal" values that this be streamlined. */
4310
6d4d30bb 4311static inline int
39e6acbd 4312output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4313{
4314 char *orig = p;
4315 valueT val = 0;
4316 int loaded = 0;
4317 unsigned byte;
4318
4319 /* Strip leading sign extensions off the bignum. */
e5604d79
RS		 4320 while (size > 1
4321 && bignum[size - 1] == LITTLENUM_MASK
4322 && bignum[size - 2] > LITTLENUM_MASK / 2)
252b5132
RH		 4323 size--;
4324
4325 do
4326 {
e5604d79
RS		 4327 /* OR in the next part of the littlenum. */
4328 val |= (*bignum << loaded);
4329 loaded += LITTLENUM_NUMBER_OF_BITS;
4330 size--;
4331 bignum++;
4332
4333 /* Add bytes until there are less than 7 bits left in VAL
4334 or until every non-sign bit has been written. */
4335 do
252b5132 4336 {
e5604d79
RS		 4337 byte = val & 0x7f;
4338 loaded -= 7;
4339 val >>= 7;
4340 if (size > 0
4341 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
252b5132 4342 byte |= 0x80;
e5604d79
RS		 4343
4344 if (orig)
4345 *p = byte;
4346 p++;
252b5132 4347 }
e5604d79
RS		 4348 while ((byte & 0x80) != 0 && loaded >= 7);
4349 }
4350 while (size > 0);
252b5132 4351
e5604d79
RS		 4352 /* Mop up any left-over bits (of which there will be less than 7). */
4353 if ((byte & 0x80) != 0)
4354 {
4355 /* Sign-extend VAL. */
4356 if (val & (1 << (loaded - 1)))
4357 val |= ~0 << loaded;
252b5132 4358 if (orig)
e5604d79 4359 *p = val & 0x7f;
252b5132
RH		 4360 p++;
4361 }
252b5132
RH		 4362
4363 return p - orig;
4364}
4365
6d4d30bb 4366static inline int
39e6acbd 4367output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4368{
4369 char *orig = p;
4370 valueT val = 0;
4371 int loaded = 0;
4372 unsigned byte;
4373
4374 /* Strip leading zeros off the bignum. */
4375 /* XXX: Is this needed? */
041ff4dd 4376 while (size > 0 && bignum[size - 1] == 0)
252b5132
RH		 4377 size--;
4378
4379 do
4380 {
4381 if (loaded < 7 && size > 0)
4382 {
4383 val |= (*bignum << loaded);
4384 loaded += 8 * CHARS_PER_LITTLENUM;
4385 size--;
4386 bignum++;
4387 }
4388
4389 byte = val & 0x7f;
4390 loaded -= 7;
4391 val >>= 7;
4392
4393 if (size > 0 || val)
4394 byte |= 0x80;
4395
4396 if (orig)
4397 *p = byte;
4398 p++;
4399 }
4400 while (byte & 0x80);
4401
4402 return p - orig;
4403}
4404
6d4d30bb 4405static int
39e6acbd 4406output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
252b5132
RH		 4407{
4408 if (sign)
4409 return output_big_sleb128 (p, bignum, size);
4410 else
4411 return output_big_uleb128 (p, bignum, size);
4412}
4413
4414/* Generate the appropriate fragments for a given expression to emit a
4415 leb128 value. */
4416
87c245cc 4417static void
39e6acbd 4418emit_leb128_expr (expressionS *exp, int sign)
252b5132
RH		 4419{
4420 operatorT op = exp->X_op;
b7712f8d 4421 unsigned int nbytes;
252b5132
RH		 4422
4423 if (op == O_absent || op == O_illegal)
4424 {
4425 as_warn (_("zero assumed for missing expression"));
4426 exp->X_add_number = 0;
4427 op = O_constant;
4428 }
4429 else if (op == O_big && exp->X_add_number <= 0)
4430 {
0e389e77 4431 as_bad (_("floating point number invalid"));
252b5132
RH		 4432 exp->X_add_number = 0;
4433 op = O_constant;
4434 }
4435 else if (op == O_register)
4436 {
4437 as_warn (_("register value used as expression"));
4438 op = O_constant;
4439 }
e5604d79
RS		 4440 else if (op == O_constant
4441 && sign
4442 && (exp->X_add_number < 0) != !exp->X_unsigned)
4443 {
4444 /* We're outputting a signed leb128 and the sign of X_add_number
4445 doesn't reflect the sign of the original value. Convert EXP
4446 to a correctly-extended bignum instead. */
4447 convert_to_bignum (exp);
4448 op = O_big;
4449 }
252b5132 4450
67a659f6
RH		 4451 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4452 a signal that this is leb128 data. It shouldn't optimize this away. */
b7712f8d 4453 nbytes = (unsigned int) -1;
67a659f6
RH		 4454 if (check_eh_frame (exp, &nbytes))
4455 abort ();
4456
371b7465
RH		 4457 /* Let the backend know that subsequent data may be byte aligned. */
4458#ifdef md_cons_align
4459 md_cons_align (1);
4460#endif
4461
252b5132
RH		 4462 if (op == O_constant)
4463 {
4464 /* If we've got a constant, emit the thing directly right now. */
4465
4466 valueT value = exp->X_add_number;
4467 int size;
4468 char *p;
4469
4470 size = sizeof_leb128 (value, sign);
4471 p = frag_more (size);
4472 output_leb128 (p, value, sign);
4473 }
4474 else if (op == O_big)
4475 {
4476 /* O_big is a different sort of constant. */
4477
4478 int size;
4479 char *p;
4480
4481 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4482 p = frag_more (size);
4483 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4484 }
4485 else
4486 {
041ff4dd 4487 /* Otherwise, we have to create a variable sized fragment and
252b5132
RH		 4488 resolve things later. */
4489
041ff4dd 4490 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
252b5132
RH		 4491 make_expr_symbol (exp), 0, (char *) NULL);
4492 }
4493}
4494
4495/* Parse the .sleb128 and .uleb128 pseudos. */
4496
4497void
39e6acbd 4498s_leb128 (int sign)
252b5132
RH		 4499{
4500 expressionS exp;
4501
00bbdfe7
BW		 4502#ifdef md_flush_pending_output
4503 md_flush_pending_output ();
4504#endif
4505
041ff4dd
NC		 4506 do
4507 {
4508 expression (&exp);
4509 emit_leb128_expr (&exp, sign);
4510 }
4511 while (*input_line_pointer++ == ',');
252b5132
RH		 4512
4513 input_line_pointer--;
4514 demand_empty_rest_of_line ();
4515}
4516\f
041ff4dd
NC		 4517/* We read 0 or more ',' separated, double-quoted strings.
4518 Caller should have checked need_pass_2 is FALSE because we don't
4519 check it. */
4520
4521void
39e6acbd
KH		 4522stringer (/* Worker to do .ascii etc statements. */
4523 /* Checks end-of-line. */
4524 register int append_zero /* 0: don't append '\0', else 1. */)
252b5132
RH		 4525{
4526 register unsigned int c;
4527 char *start;
4528
4529#ifdef md_flush_pending_output
4530 md_flush_pending_output ();
4531#endif
4532
041ff4dd
NC		 4533 /* The following awkward logic is to parse ZERO or more strings,
4534 comma separated. Recall a string expression includes spaces
4535 before the opening '\"' and spaces after the closing '\"'.
4536 We fake a leading ',' if there is (supposed to be)
4537 a 1st, expression. We keep demanding expressions for each ','. */
252b5132
RH		 4538 if (is_it_end_of_statement ())
4539 {
041ff4dd
NC		 4540 c = 0; /* Skip loop. */
4541 ++input_line_pointer; /* Compensate for end of loop. */
252b5132
RH		 4542 }
4543 else
4544 {
041ff4dd 4545 c = ','; /* Do loop. */
252b5132 4546 }
8ac9ba6c
NC		 4547 /* If we have been switched into the abs_section then we
4548 will not have an obstack onto which we can hang strings. */
4549 if (now_seg == absolute_section)
4550 {
4551 as_bad (_("strings must be placed into a section"));
4552 c = 0;
4553 ignore_rest_of_line ();
4554 }
d6415f6c 4555
252b5132
RH		 4556 while (c == ',' || c == '<' || c == '"')
4557 {
4558 SKIP_WHITESPACE ();
4559 switch (*input_line_pointer)
4560 {
4561 case '\"':
041ff4dd 4562 ++input_line_pointer; /*->1st char of string. */
252b5132
RH		 4563 start = input_line_pointer;
4564 while (is_a_char (c = next_char_of_string ()))
4565 {
4566 FRAG_APPEND_1_CHAR (c);
4567 }
4568 if (append_zero)
4569 {
4570 FRAG_APPEND_1_CHAR (0);
4571 }
4572 know (input_line_pointer[-1] == '\"');
4573
4574#ifndef NO_LISTING
4575#ifdef OBJ_ELF
4576 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
d6415f6c
AM		 4577 will emit .string with a filename in the .debug section
4578 after a sequence of constants. See the comment in
4579 emit_expr for the sequence. emit_expr will set
4580 dwarf_file_string to non-zero if this string might be a
4581 source file name. */
252b5132
RH		 4582 if (strcmp (segment_name (now_seg), ".debug") != 0)
4583 dwarf_file_string = 0;
4584 else if (dwarf_file_string)
4585 {
4586 c = input_line_pointer[-1];
4587 input_line_pointer[-1] = '\0';
4588 listing_source_file (start);
4589 input_line_pointer[-1] = c;
4590 }
4591#endif
4592#endif
4593
4594 break;
4595 case '<':
4596 input_line_pointer++;
4597 c = get_single_number ();
4598 FRAG_APPEND_1_CHAR (c);
4599 if (*input_line_pointer != '>')
4600 {
0e389e77 4601 as_bad (_("expected <nn>"));
252b5132
RH		 4602 }
4603 input_line_pointer++;
4604 break;
4605 case ',':
4606 input_line_pointer++;
4607 break;
4608 }
4609 SKIP_WHITESPACE ();
4610 c = *input_line_pointer;
4611 }
4612
4613 demand_empty_rest_of_line ();
4614} /* stringer() */
4615\f
4616/* FIXME-SOMEDAY: I had trouble here on characters with the
4617 high bits set. We'll probably also have trouble with
4618 multibyte chars, wide chars, etc. Also be careful about
041ff4dd 4619 returning values bigger than 1 byte. xoxorich. */
252b5132 4620
041ff4dd 4621unsigned int
39e6acbd 4622next_char_of_string (void)
252b5132
RH		 4623{
4624 register unsigned int c;
4625
4626 c = *input_line_pointer++ & CHAR_MASK;
4627 switch (c)
4628 {
4629 case '\"':
4630 c = NOT_A_CHAR;
4631 break;
4632
4633 case '\n':
0e389e77 4634 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 4635 bump_line_counters ();
4636 break;
4637
4638#ifndef NO_STRING_ESCAPES
4639 case '\\':
4640 switch (c = *input_line_pointer++)
4641 {
4642 case 'b':
4643 c = '\b';
4644 break;
4645
4646 case 'f':
4647 c = '\f';
4648 break;
4649
4650 case 'n':
4651 c = '\n';
4652 break;
4653
4654 case 'r':
4655 c = '\r';
4656 break;
4657
4658 case 't':
4659 c = '\t';
4660 break;
4661
4662 case 'v':
4663 c = '\013';
4664 break;
4665
4666 case '\\':
4667 case '"':
041ff4dd 4668 break; /* As itself. */
252b5132
RH		 4669
4670 case '0':
4671 case '1':
4672 case '2':
4673 case '3':
4674 case '4':
4675 case '5':
4676 case '6':
4677 case '7':
4678 case '8':
4679 case '9':
4680 {
4681 long number;
4682 int i;
4683
041ff4dd 4684 for (i = 0, number = 0;
3882b010 4685 ISDIGIT (c) && i < 3;
041ff4dd 4686 c = *input_line_pointer++, i++)
252b5132
RH		 4687 {
4688 number = number * 8 + c - '0';
4689 }
f0e652b4 4690
252b5132
RH		 4691 c = number & 0xff;
4692 }
4693 --input_line_pointer;
4694 break;
4695
4696 case 'x':
4697 case 'X':
4698 {
4699 long number;
4700
4701 number = 0;
4702 c = *input_line_pointer++;
3882b010 4703 while (ISXDIGIT (c))
252b5132 4704 {
3882b010 4705 if (ISDIGIT (c))
252b5132 4706 number = number * 16 + c - '0';
3882b010 4707 else if (ISUPPER (c))
252b5132
RH		 4708 number = number * 16 + c - 'A' + 10;
4709 else
4710 number = number * 16 + c - 'a' + 10;
4711 c = *input_line_pointer++;
4712 }
4713 c = number & 0xff;
4714 --input_line_pointer;
4715 }
4716 break;
4717
4718 case '\n':
041ff4dd 4719 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
0e389e77 4720 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 4721 c = '\n';
4722 bump_line_counters ();
4723 break;
4724
4725 default:
4726
4727#ifdef ONLY_STANDARD_ESCAPES
0e389e77 4728 as_bad (_("bad escaped character in string"));
252b5132
RH		 4729 c = '?';
4730#endif /* ONLY_STANDARD_ESCAPES */
4731
4732 break;
041ff4dd 4733 }
252b5132
RH		 4734 break;
4735#endif /* ! defined (NO_STRING_ESCAPES) */
4736
4737 default:
4738 break;
041ff4dd 4739 }
252b5132 4740 return (c);
041ff4dd 4741}
252b5132
RH		 4742\f
4743static segT
39e6acbd 4744get_segmented_expression (register expressionS *expP)
252b5132
RH		 4745{
4746 register segT retval;
4747
4748 retval = expression (expP);
4749 if (expP->X_op == O_illegal
4750 || expP->X_op == O_absent
4751 || expP->X_op == O_big)
4752 {
0e389e77 4753 as_bad (_("expected address expression"));
252b5132
RH		 4754 expP->X_op = O_constant;
4755 expP->X_add_number = 0;
4756 retval = absolute_section;
4757 }
4758 return retval;
4759}
4760
041ff4dd 4761static segT
39e6acbd 4762get_known_segmented_expression (register expressionS *expP)
252b5132
RH		 4763{
4764 register segT retval;
4765
4766 if ((retval = get_segmented_expression (expP)) == undefined_section)
4767 {
4768 /* There is no easy way to extract the undefined symbol from the
4769 expression. */
4770 if (expP->X_add_symbol != NULL
4771 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4772 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4773 S_GET_NAME (expP->X_add_symbol));
4774 else
4775 as_warn (_("some symbol undefined; zero assumed"));
4776 retval = absolute_section;
4777 expP->X_op = O_constant;
4778 expP->X_add_number = 0;
4779 }
4780 know (retval == absolute_section || SEG_NORMAL (retval));
4781 return (retval);
041ff4dd 4782}
252b5132 4783
041ff4dd 4784char /* Return terminator. */
39e6acbd 4785get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
252b5132
RH		 4786{
4787 /* FIXME: val_pointer should probably be offsetT *. */
4788 *val_pointer = (long) get_absolute_expression ();
4789 return (*input_line_pointer++);
4790}
4791\f
041ff4dd
NC		 4792/* Like demand_copy_string, but return NULL if the string contains any '\0's.
4793 Give a warning if that happens. */
4794
252b5132 4795char *
39e6acbd 4796demand_copy_C_string (int *len_pointer)
252b5132
RH		 4797{
4798 register char *s;
4799
4800 if ((s = demand_copy_string (len_pointer)) != 0)
4801 {
4802 register int len;
4803
4804 for (len = *len_pointer; len > 0; len--)
4805 {
4806 if (*s == 0)
4807 {
4808 s = 0;
4809 len = 1;
4810 *len_pointer = 0;
0e389e77 4811 as_bad (_("this string may not contain \'\\0\'"));
252b5132
RH		 4812 }
4813 }
4814 }
f0e652b4 4815
252b5132
RH		 4816 return s;
4817}
4818\f
041ff4dd
NC		 4819/* Demand string, but return a safe (=private) copy of the string.
4820 Return NULL if we can't read a string here. */
4821
252b5132 4822char *
39e6acbd 4823demand_copy_string (int *lenP)
252b5132
RH		 4824{
4825 register unsigned int c;
4826 register int len;
4827 char *retval;
4828
4829 len = 0;
4830 SKIP_WHITESPACE ();
4831 if (*input_line_pointer == '\"')
4832 {
041ff4dd 4833 input_line_pointer++; /* Skip opening quote. */
252b5132
RH		 4834
4835 while (is_a_char (c = next_char_of_string ()))
4836 {
4837 obstack_1grow (&notes, c);
4838 len++;
4839 }
4840 /* JF this next line is so demand_copy_C_string will return a
041ff4dd 4841 null terminated string. */
252b5132
RH		 4842 obstack_1grow (&notes, '\0');
4843 retval = obstack_finish (&notes);
4844 }
4845 else
4846 {
c95b35a9 4847 as_bad (_("missing string"));
252b5132
RH		 4848 retval = NULL;
4849 ignore_rest_of_line ();
4850 }
4851 *lenP = len;
4852 return (retval);
041ff4dd 4853}
252b5132 4854\f
041ff4dd 4855/* In: Input_line_pointer->next character.
f0e652b4 4856
041ff4dd 4857 Do: Skip input_line_pointer over all whitespace.
f0e652b4 4858
041ff4dd
NC		 4859 Out: 1 if input_line_pointer->end-of-line. */
4860
4861int
39e6acbd 4862is_it_end_of_statement (void)
252b5132
RH		 4863{
4864 SKIP_WHITESPACE ();
4865 return (is_end_of_line[(unsigned char) *input_line_pointer]);
041ff4dd 4866}
252b5132 4867
041ff4dd 4868void
39e6acbd 4869equals (char *sym_name, int reassign)
252b5132 4870{
252b5132
RH		 4871 char *stop = NULL;
4872 char stopc;
4873
4874 input_line_pointer++;
4875 if (*input_line_pointer == '=')
4876 input_line_pointer++;
9497f5ac
NC		 4877 if (reassign < 0 && *input_line_pointer == '=')
4878 input_line_pointer++;
252b5132
RH		 4879
4880 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4881 input_line_pointer++;
4882
4883 if (flag_mri)
4884 stop = mri_comment_field (&stopc);
4885
9497f5ac 4886 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
252b5132
RH		 4887
4888 if (flag_mri)
31d20a21
AM		 4889 {
4890 demand_empty_rest_of_line ();
4891 mri_comment_end (stop, stopc);
4892 }
041ff4dd 4893}
252b5132 4894
7e005732
NC		 4895/* .incbin -- include a file verbatim at the current location. */
4896
4897void
39e6acbd 4898s_incbin (int x ATTRIBUTE_UNUSED)
7e005732
NC		 4899{
4900 FILE * binfile;
4901 char * path;
4902 char * filename;
4903 char * binfrag;
4904 long skip = 0;
4905 long count = 0;
4906 long bytes;
4907 int len;
4908
4909#ifdef md_flush_pending_output
4910 md_flush_pending_output ();
4911#endif
4912
4913 SKIP_WHITESPACE ();
4914 filename = demand_copy_string (& len);
4915 if (filename == NULL)
4916 return;
4917
4918 SKIP_WHITESPACE ();
4919
4920 /* Look for optional skip and count. */
4921 if (* input_line_pointer == ',')
4922 {
4923 ++ input_line_pointer;
4924 skip = get_absolute_expression ();
4925
4926 SKIP_WHITESPACE ();
4927
4928 if (* input_line_pointer == ',')
4929 {
4930 ++ input_line_pointer;
4931
4932 count = get_absolute_expression ();
4933 if (count == 0)
4934 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
4935
4936 SKIP_WHITESPACE ();
4937 }
4938 }
4939
4940 demand_empty_rest_of_line ();
4941
4942 /* Try opening absolute path first, then try include dirs. */
f740e790 4943 binfile = fopen (filename, FOPEN_RB);
7e005732
NC		 4944 if (binfile == NULL)
4945 {
4946 int i;
4947
4948 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
4949
4950 for (i = 0; i < include_dir_count; i++)
4951 {
4952 sprintf (path, "%s/%s", include_dirs[i], filename);
4953
f740e790 4954 binfile = fopen (path, FOPEN_RB);
7e005732
NC		 4955 if (binfile != NULL)
4956 break;
4957 }
4958
4959 if (binfile == NULL)
4960 as_bad (_("file not found: %s"), filename);
4961 }
4962 else
4963 path = xstrdup (filename);
4964
4965 if (binfile)
4966 {
f740e790
NC		 4967 long file_len;
4968
7e005732
NC		 4969 register_dependency (path);
4970
4971 /* Compute the length of the file. */
4972 if (fseek (binfile, 0, SEEK_END) != 0)
4973 {
4974 as_bad (_("seek to end of .incbin file failed `%s'"), path);
4975 goto done;
4976 }
f740e790 4977 file_len = ftell (binfile);
7e005732 4978
c556cc9c 4979 /* If a count was not specified use the remainder of the file. */
7e005732 4980 if (count == 0)
c556cc9c 4981 count = file_len - skip;
7e005732 4982
c556cc9c 4983 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
7e005732 4984 {
c556cc9c 4985 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
f740e790 4986 skip, count, file_len);
7e005732
NC		 4987 goto done;
4988 }
4989
4990 if (fseek (binfile, skip, SEEK_SET) != 0)
4991 {
4992 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
4993 goto done;
4994 }
4995
4996 /* Allocate frag space and store file contents in it. */
4997 binfrag = frag_more (count);
4998
4999 bytes = fread (binfrag, 1, count, binfile);
5000 if (bytes < count)
5001 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5002 path, bytes, count);
5003 }
5004done:
5005 if (binfile != NULL)
5006 fclose (binfile);
5007 if (path)
5008 free (path);
5009}
5010
041ff4dd 5011/* .include -- include a file at this point. */
252b5132 5012
041ff4dd 5013void
39e6acbd 5014s_include (int arg ATTRIBUTE_UNUSED)
252b5132 5015{
252b5132
RH		 5016 char *filename;
5017 int i;
5018 FILE *try;
5019 char *path;
5020
041ff4dd 5021 if (!flag_m68k_mri)
252b5132
RH		 5022 {
5023 filename = demand_copy_string (&i);
5024 if (filename == NULL)
5025 {
5026 /* demand_copy_string has already printed an error and
d6415f6c 5027 called ignore_rest_of_line. */
252b5132
RH		 5028 return;
5029 }
5030 }
5031 else
5032 {
5033 SKIP_WHITESPACE ();
5034 i = 0;
041ff4dd 5035 while (!is_end_of_line[(unsigned char) *input_line_pointer]
252b5132
RH		 5036 && *input_line_pointer != ' '
5037 && *input_line_pointer != '\t')
5038 {
5039 obstack_1grow (&notes, *input_line_pointer);
5040 ++input_line_pointer;
5041 ++i;
5042 }
f0e652b4 5043
252b5132
RH		 5044 obstack_1grow (&notes, '\0');
5045 filename = obstack_finish (&notes);
041ff4dd 5046 while (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 5047 ++input_line_pointer;
5048 }
f0e652b4 5049
252b5132
RH		 5050 demand_empty_rest_of_line ();
5051 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
f0e652b4 5052
252b5132
RH		 5053 for (i = 0; i < include_dir_count; i++)
5054 {
5055 strcpy (path, include_dirs[i]);
5056 strcat (path, "/");
5057 strcat (path, filename);
f740e790 5058 if (0 != (try = fopen (path, FOPEN_RT)))
252b5132
RH		 5059 {
5060 fclose (try);
5061 goto gotit;
5062 }
5063 }
f0e652b4 5064
252b5132
RH		 5065 free (path);
5066 path = filename;
5067gotit:
041ff4dd 5068 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
252b5132 5069 register_dependency (path);
9f10757c 5070 input_scrub_insert_file (path);
041ff4dd 5071}
252b5132 5072
041ff4dd 5073void
39e6acbd 5074add_include_dir (char *path)
252b5132
RH		 5075{
5076 int i;
5077
5078 if (include_dir_count == 0)
5079 {
5080 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
041ff4dd 5081 include_dirs[0] = "."; /* Current dir. */
252b5132
RH		 5082 include_dir_count = 2;
5083 }
5084 else
5085 {
5086 include_dir_count++;
041ff4dd
NC		 5087 include_dirs =
5088 (char **) realloc (include_dirs,
5089 include_dir_count * sizeof (*include_dirs));
252b5132
RH		 5090 }
5091
041ff4dd 5092 include_dirs[include_dir_count - 1] = path; /* New one. */
252b5132
RH		 5093
5094 i = strlen (path);
5095 if (i > include_dir_maxlen)
5096 include_dir_maxlen = i;
041ff4dd 5097}
252b5132
RH		 5098\f
5099/* Output debugging information to denote the source file. */
5100
5101static void
39e6acbd 5102generate_file_debug (void)
252b5132
RH		 5103{
5104 if (debug_type == DEBUG_STABS)
5105 stabs_generate_asm_file ();
5106}
5107
5108/* Output line number debugging information for the current source line. */
5109
5110void
39e6acbd 5111generate_lineno_debug (void)
252b5132 5112{
252b5132
RH		 5113 switch (debug_type)
5114 {
5115 case DEBUG_UNSPECIFIED:
5116 case DEBUG_NONE:
4dc7ead9 5117 case DEBUG_DWARF:
252b5132
RH		 5118 break;
5119 case DEBUG_STABS:
5120 stabs_generate_asm_lineno ();
5121 break;
5122 case DEBUG_ECOFF:
5123 ecoff_generate_asm_lineno ();
5124 break;
252b5132 5125 case DEBUG_DWARF2:
4dc7ead9
RH		 5126 /* ??? We could here indicate to dwarf2dbg.c that something
5127 has changed. However, since there is additional backend
5128 support that is required (calling dwarf2_emit_insn), we
5129 let dwarf2dbg.c call as_where on its own. */
252b5132
RH		 5130 break;
5131 }
5132}
5133
5134/* Output debugging information to mark a function entry point or end point.
5135 END_P is zero for .func, and non-zero for .endfunc. */
5136
5137void
39e6acbd 5138s_func (int end_p)
252b5132
RH		 5139{
5140 do_s_func (end_p, NULL);
5141}
5142
5143/* Subroutine of s_func so targets can choose a different default prefix.
5144 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5145
87c245cc 5146static void
39e6acbd 5147do_s_func (int end_p, const char *default_prefix)
252b5132
RH		 5148{
5149 /* Record the current function so that we can issue an error message for
5150 misplaced .func,.endfunc, and also so that .endfunc needs no
5151 arguments. */
5152 static char *current_name;
5153 static char *current_label;
5154
5155 if (end_p)
5156 {
5157 if (current_name == NULL)
5158 {
5159 as_bad (_("missing .func"));
5160 ignore_rest_of_line ();
5161 return;
5162 }
5163
5164 if (debug_type == DEBUG_STABS)
5165 stabs_generate_asm_endfunc (current_name, current_label);
5166
5167 current_name = current_label = NULL;
5168 }
5169 else /* ! end_p */
5170 {
041ff4dd
NC		 5171 char *name, *label;
5172 char delim1, delim2;
252b5132
RH		 5173
5174 if (current_name != NULL)
5175 {
5176 as_bad (_(".endfunc missing for previous .func"));
5177 ignore_rest_of_line ();
5178 return;
5179 }
5180
5181 name = input_line_pointer;
5182 delim1 = get_symbol_end ();
5183 name = xstrdup (name);
5184 *input_line_pointer = delim1;
5185 SKIP_WHITESPACE ();
5186 if (*input_line_pointer != ',')
5187 {
5188 if (default_prefix)
5189 asprintf (&label, "%s%s", default_prefix, name);
5190 else
5191 {
7be1c489 5192 char leading_char = bfd_get_symbol_leading_char (stdoutput);
252b5132
RH		 5193 /* Missing entry point, use function's name with the leading
5194 char prepended. */
5195 if (leading_char)
5196 asprintf (&label, "%c%s", leading_char, name);
5197 else
5198 label = name;
5199 }
5200 }
5201 else
5202 {
5203 ++input_line_pointer;
5204 SKIP_WHITESPACE ();
5205 label = input_line_pointer;
5206 delim2 = get_symbol_end ();
5207 label = xstrdup (label);
5208 *input_line_pointer = delim2;
5209 }
5210
5211 if (debug_type == DEBUG_STABS)
5212 stabs_generate_asm_func (name, label);
5213
5214 current_name = name;
5215 current_label = label;
5216 }
5217
5218 demand_empty_rest_of_line ();
5219}
5220\f
041ff4dd 5221void
39e6acbd 5222s_ignore (int arg ATTRIBUTE_UNUSED)
252b5132 5223{
40a4d956 5224 ignore_rest_of_line ();
252b5132
RH		 5225}
5226
252b5132 5227void
39e6acbd 5228read_print_statistics (FILE *file)
252b5132
RH		 5229{
5230 hash_print_statistics (file, "pseudo-op table", po_hash);
5231}
5232
041ff4dd
NC		 5233/* Inserts the given line into the input stream.
5234
9f10757c
TW		 5235 This call avoids macro/conditionals nesting checking, since the contents of
5236 the line are assumed to replace the contents of a line already scanned.
5237
47eebc20 5238 An appropriate use of this function would be substitution of input lines when
9f10757c
TW		 5239 called by md_start_line_hook(). The given line is assumed to already be
5240 properly scrubbed. */
5241
5242void
39e6acbd 5243input_scrub_insert_line (const char *line)
9f10757c
TW		 5244{
5245 sb newline;
5246 sb_new (&newline);
5247 sb_add_string (&newline, line);
5248 input_scrub_include_sb (&newline, input_line_pointer, 0);
5249 sb_kill (&newline);
5250 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5251}
5252
5253/* Insert a file into the input stream; the path must resolve to an actual
041ff4dd 5254 file; no include path searching or dependency registering is performed. */
9f10757c
TW		 5255
5256void
39e6acbd 5257input_scrub_insert_file (char *path)
9f10757c
TW		 5258{
5259 input_scrub_include_file (path, input_line_pointer);
5260 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5261}
40a4d956
JB		 5262
5263/* Find the end of a line, considering quotation and escaping of quotes. */
5264
5265#if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5266# define TC_SINGLE_QUOTE_STRINGS 1
5267#endif
5268
5269static char *
5270_find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5271{
5272 char inquote = '\0';
5273 int inescape = 0;
5274
5275 while (!is_end_of_line[(unsigned char) *s]
5276 || (inquote && !ISCNTRL (*s))
5277 || (inquote == '\'' && flag_mri)
5278#ifdef TC_EOL_IN_INSN
5279 || (insn && TC_EOL_IN_INSN (s))
5280#endif
5281 )
5282 {
5283 if (mri_string && *s == '\'')
5284 inquote ^= *s;
5285 else if (inescape)
5286 inescape = 0;
5287 else if (*s == '\\')
5288 inescape = 1;
5289 else if (!inquote
5290 ? *s == '"'
5291#ifdef TC_SINGLE_QUOTE_STRINGS
5292 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5293#endif
5294 : *s == inquote)
5295 inquote ^= *s;
5296 ++s;
5297 }
5298 if (inquote)
5299 as_warn (_("missing closing `%c'"), inquote);
5300 if (inescape)
5301 as_warn (_("stray `\\'"));
5302 return s;
5303}
5304
5305char *
5306find_end_of_line (char *s, int mri_string)
5307{
5308 return _find_end_of_line (s, mri_string, 0);
5309}
GDB Binutils - Deliverables
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