projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
gdb/testsuite/
[deliverable/binutils-gdb.git] / gas / read.c
CommitLineData
252b5132 1/* read.c - read a source file -
f7e42eb4 2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3d540e93
NC		 3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 2010 Free Software Foundation, Inc.
252b5132 5
ec2655a6 6 This file is part of GAS, the GNU Assembler.
252b5132 7
ec2655a6
NC		 8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
252b5132 12
ec2655a6
NC		 13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
252b5132 17
ec2655a6
NC		 18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, 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"
252b5132 41#include "ecoff.h"
54cfded0 42#include "dw2gencfi.h"
252b5132
RH		 43
44#ifndef TC_START_LABEL
5e8c8f8f 45#define TC_START_LABEL(x,y,z) (x == ':')
252b5132
RH		 46#endif
47
8684e216
HPN		 48/* Set by the object-format or the target. */
49#ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
d6415f6c 50#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
041ff4dd 51 do \
d6415f6c
AM		 52 { \
53 if ((SIZE) >= 8) \
54 (P2VAR) = 3; \
55 else if ((SIZE) >= 4) \
56 (P2VAR) = 2; \
57 else if ((SIZE) >= 2) \
58 (P2VAR) = 1; \
59 else \
60 (P2VAR) = 0; \
041ff4dd
NC		 61 } \
62 while (0)
8684e216
HPN		 63#endif
64
041ff4dd 65char *input_line_pointer; /*->next char of source file to parse. */
252b5132
RH		 66
67#if BITS_PER_CHAR != 8
68/* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
70die horribly;
71#endif
72
73#ifndef LEX_AT
252b5132
RH		 74#define LEX_AT 0
75#endif
76
77#ifndef LEX_BR
78/* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
79#define LEX_BR 0
80#endif
81
82#ifndef LEX_PCT
83/* The Delta 68k assembler permits % inside label names. */
84#define LEX_PCT 0
85#endif
86
87#ifndef LEX_QM
88/* The PowerPC Windows NT assemblers permits ? inside label names. */
89#define LEX_QM 0
90#endif
91
58b5739a 92#ifndef LEX_HASH
800eeca4
JW		 93/* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
58b5739a
RH		 95#define LEX_HASH 0
96#endif
97
252b5132 98#ifndef LEX_DOLLAR
252b5132
RH		 99#define LEX_DOLLAR 3
100#endif
101
102#ifndef LEX_TILDE
103/* The Delta 68k assembler permits ~ at start of label names. */
104#define LEX_TILDE 0
105#endif
106
041ff4dd 107/* Used by is_... macros. our ctype[]. */
ef99799a 108char lex_type[256] = {
252b5132
RH		 109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
58b5739a 111 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
252b5132
RH		 112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
113 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
041ff4dd 116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
252b5132
RH		 117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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};
126
041ff4dd 127/* In: a character.
d67ffd56
L		 128 Out: 1 if this character ends a line.
129 2 if this character is a line separator. */
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);
104d59d1
JM		 217#ifdef OBJ_ELF
218static void s_gnu_attribute (int);
219#endif
05e9452c 220static void s_reloc (int);
39e6acbd 221static int hex_float (int, char *);
39e6acbd
KH		 222static segT get_known_segmented_expression (expressionS * expP);
223static void pobegin (void);
7592cfd7 224static int get_non_macro_line_sb (sb *);
39e6acbd 225static void generate_file_debug (void);
7592cfd7 226static char *_find_end_of_line (char *, int, int, int);
252b5132 227\f
252b5132 228void
39e6acbd 229read_begin (void)
252b5132
RH		 230{
231 const char *p;
232
233 pobegin ();
234 obj_read_begin_hook ();
235
236 /* Something close -- but not too close -- to a multiple of 1024.
237 The debugging malloc I'm using has 24 bytes of overhead. */
238 obstack_begin (&notes, chunksize);
239 obstack_begin (&cond_obstack, chunksize);
240
041ff4dd 241 /* Use machine dependent syntax. */
252b5132 242 for (p = line_separator_chars; *p; p++)
d67ffd56 243 is_end_of_line[(unsigned char) *p] = 2;
041ff4dd 244 /* Use more. FIXME-SOMEDAY. */
252b5132
RH		 245
246 if (flag_mri)
247 lex_type['?'] = 3;
248}
249\f
cc1bc22a 250#ifndef TC_ADDRESS_BYTES
cc1bc22a
AM		 251#define TC_ADDRESS_BYTES address_bytes
252
253static inline int
254address_bytes (void)
255{
256 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
257 contain an address. */
258 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
259 n |= n >> 1;
260 n |= n >> 2;
261 n += 1;
262 return n;
263}
264#endif
cc1bc22a 265
041ff4dd 266/* Set up pseudo-op tables. */
252b5132
RH		 267
268static struct hash_control *po_hash;
269
ef99799a 270static const pseudo_typeS potable[] = {
252b5132
RH		 271 {"abort", s_abort, 0},
272 {"align", s_align_ptwo, 0},
caa32fe5 273 {"altmacro", s_altmacro, 1},
38a57ae7
NC		 274 {"ascii", stringer, 8+0},
275 {"asciz", stringer, 8+1},
252b5132
RH		 276 {"balign", s_align_bytes, 0},
277 {"balignw", s_align_bytes, -2},
278 {"balignl", s_align_bytes, -4},
041ff4dd 279/* block */
252b5132
RH		 280 {"byte", cons, 1},
281 {"comm", s_comm, 0},
282 {"common", s_mri_common, 0},
283 {"common.s", s_mri_common, 1},
284 {"data", s_data, 0},
285 {"dc", cons, 2},
cc1bc22a
AM		 286#ifdef TC_ADDRESS_BYTES
287 {"dc.a", cons, 0},
288#endif
252b5132
RH		 289 {"dc.b", cons, 1},
290 {"dc.d", float_cons, 'd'},
291 {"dc.l", cons, 4},
292 {"dc.s", float_cons, 'f'},
293 {"dc.w", cons, 2},
294 {"dc.x", float_cons, 'x'},
295 {"dcb", s_space, 2},
296 {"dcb.b", s_space, 1},
297 {"dcb.d", s_float_space, 'd'},
298 {"dcb.l", s_space, 4},
299 {"dcb.s", s_float_space, 'f'},
300 {"dcb.w", s_space, 2},
301 {"dcb.x", s_float_space, 'x'},
302 {"ds", s_space, 2},
303 {"ds.b", s_space, 1},
304 {"ds.d", s_space, 8},
305 {"ds.l", s_space, 4},
306 {"ds.p", s_space, 12},
307 {"ds.s", s_space, 4},
308 {"ds.w", s_space, 2},
309 {"ds.x", s_space, 12},
310 {"debug", s_ignore, 0},
311#ifdef S_SET_DESC
312 {"desc", s_desc, 0},
313#endif
041ff4dd 314/* dim */
252b5132 315 {"double", float_cons, 'd'},
041ff4dd
NC		 316/* dsect */
317 {"eject", listing_eject, 0}, /* Formfeed listing. */
252b5132
RH		 318 {"else", s_else, 0},
319 {"elsec", s_else, 0},
3fd9f047 320 {"elseif", s_elseif, (int) O_ne},
252b5132
RH		 321 {"end", s_end, 0},
322 {"endc", s_endif, 0},
323 {"endfunc", s_func, 1},
324 {"endif", s_endif, 0},
057f53c1
JB		 325 {"endm", s_bad_end, 0},
326 {"endr", s_bad_end, 1},
041ff4dd 327/* endef */
252b5132
RH		 328 {"equ", s_set, 0},
329 {"equiv", s_set, 1},
9497f5ac 330 {"eqv", s_set, -1},
252b5132 331 {"err", s_err, 0},
d190d046 332 {"error", s_errwarn, 1},
252b5132 333 {"exitm", s_mexit, 0},
041ff4dd
NC		 334/* extend */
335 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
252b5132 336 {"appfile", s_app_file, 1},
93e914b2 337 {"appline", s_app_line, 1},
252b5132
RH		 338 {"fail", s_fail, 0},
339 {"file", s_app_file, 0},
340 {"fill", s_fill, 0},
341 {"float", float_cons, 'f'},
342 {"format", s_ignore, 0},
343 {"func", s_func, 0},
344 {"global", s_globl, 0},
345 {"globl", s_globl, 0},
104d59d1
JM		 346#ifdef OBJ_ELF
347 {"gnu_attribute", s_gnu_attribute, 0},
348#endif
252b5132
RH		 349 {"hword", cons, 2},
350 {"if", s_if, (int) O_ne},
26aca5f6 351 {"ifb", s_ifb, 1},
252b5132
RH		 352 {"ifc", s_ifc, 0},
353 {"ifdef", s_ifdef, 0},
354 {"ifeq", s_if, (int) O_eq},
355 {"ifeqs", s_ifeqs, 0},
356 {"ifge", s_if, (int) O_ge},
357 {"ifgt", s_if, (int) O_gt},
358 {"ifle", s_if, (int) O_le},
359 {"iflt", s_if, (int) O_lt},
26aca5f6 360 {"ifnb", s_ifb, 0},
252b5132
RH		 361 {"ifnc", s_ifc, 1},
362 {"ifndef", s_ifdef, 1},
363 {"ifne", s_if, (int) O_ne},
364 {"ifnes", s_ifeqs, 1},
365 {"ifnotdef", s_ifdef, 1},
7e005732 366 {"incbin", s_incbin, 0},
252b5132
RH		 367 {"include", s_include, 0},
368 {"int", cons, 4},
369 {"irp", s_irp, 0},
370 {"irep", s_irp, 0},
371 {"irpc", s_irp, 1},
372 {"irepc", s_irp, 1},
373 {"lcomm", s_lcomm, 0},
c2069bb2 374 {"lflags", s_ignore, 0}, /* Listing flags. */
93e914b2 375 {"linefile", s_app_line, 0},
252b5132 376 {"linkonce", s_linkonce, 0},
041ff4dd 377 {"list", listing_list, 1}, /* Turn listing on. */
252b5132
RH		 378 {"llen", listing_psize, 1},
379 {"long", cons, 4},
380 {"lsym", s_lsym, 0},
381 {"macro", s_macro, 0},
382 {"mexit", s_mexit, 0},
383 {"mri", s_mri, 0},
384 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
385 {"name", s_ignore, 0},
caa32fe5 386 {"noaltmacro", s_altmacro, 0},
252b5132 387 {"noformat", s_ignore, 0},
041ff4dd 388 {"nolist", listing_list, 0}, /* Turn listing off. */
252b5132
RH		 389 {"nopage", listing_nopage, 0},
390 {"octa", cons, 16},
391 {"offset", s_struct, 0},
392 {"org", s_org, 0},
393 {"p2align", s_align_ptwo, 0},
394 {"p2alignw", s_align_ptwo, -2},
395 {"p2alignl", s_align_ptwo, -4},
396 {"page", listing_eject, 0},
397 {"plen", listing_psize, 0},
398 {"print", s_print, 0},
041ff4dd 399 {"psize", listing_psize, 0}, /* Set paper size. */
252b5132
RH		 400 {"purgem", s_purgem, 0},
401 {"quad", cons, 8},
05e9452c 402 {"reloc", s_reloc, 0},
252b5132
RH		 403 {"rep", s_rept, 0},
404 {"rept", s_rept, 0},
405 {"rva", s_rva, 4},
041ff4dd
NC		 406 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
407/* scl */
408/* sect */
252b5132
RH		 409 {"set", s_set, 0},
410 {"short", cons, 2},
411 {"single", float_cons, 'f'},
041ff4dd 412/* size */
252b5132
RH		 413 {"space", s_space, 0},
414 {"skip", s_space, 0},
415 {"sleb128", s_leb128, 1},
416 {"spc", s_ignore, 0},
417 {"stabd", s_stab, 'd'},
418 {"stabn", s_stab, 'n'},
419 {"stabs", s_stab, 's'},
38a57ae7
NC		 420 {"string", stringer, 8+1},
421 {"string8", stringer, 8+1},
422 {"string16", stringer, 16+1},
423 {"string32", stringer, 32+1},
424 {"string64", stringer, 64+1},
252b5132 425 {"struct", s_struct, 0},
041ff4dd 426/* tag */
252b5132
RH		 427 {"text", s_text, 0},
428
429 /* This is for gcc to use. It's only just been added (2/94), so gcc
430 won't be able to use it for a while -- probably a year or more.
431 But once this has been released, check with gcc maintainers
432 before deleting it or even changing the spelling. */
433 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
434 /* If we're folding case -- done for some targets, not necessarily
435 all -- the above string in an input file will be converted to
436 this one. Match it either way... */
437 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
438
041ff4dd 439 {"title", listing_title, 0}, /* Listing title. */
252b5132 440 {"ttl", listing_title, 0},
041ff4dd 441/* type */
252b5132 442 {"uleb128", s_leb128, 0},
041ff4dd
NC		 443/* use */
444/* val */
252b5132
RH		 445 {"xcom", s_comm, 0},
446 {"xdef", s_globl, 0},
447 {"xref", s_ignore, 0},
448 {"xstabs", s_xstab, 's'},
d190d046 449 {"warning", s_errwarn, 0},
06e77878 450 {"weakref", s_weakref, 0},
252b5132
RH		 451 {"word", cons, 2},
452 {"zero", s_space, 0},
041ff4dd 453 {NULL, NULL, 0} /* End sentinel. */
252b5132
RH		 454};
455
87c245cc
BE		 456static offsetT
457get_absolute_expr (expressionS *exp)
458{
9497f5ac 459 expression_and_evaluate (exp);
87c245cc
BE		 460 if (exp->X_op != O_constant)
461 {
462 if (exp->X_op != O_absent)
463 as_bad (_("bad or irreducible absolute expression"));
464 exp->X_add_number = 0;
465 }
466 return exp->X_add_number;
467}
468
469offsetT
470get_absolute_expression (void)
471{
472 expressionS exp;
473
474 return get_absolute_expr (&exp);
475}
476
252b5132
RH		 477static int pop_override_ok = 0;
478static const char *pop_table_name;
479
480void
39e6acbd 481pop_insert (const pseudo_typeS *table)
252b5132
RH		 482{
483 const char *errtxt;
484 const pseudo_typeS *pop;
485 for (pop = table; pop->poc_name; pop++)
486 {
487 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
488 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
489 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
490 errtxt);
491 }
492}
493
494#ifndef md_pop_insert
495#define md_pop_insert() pop_insert(md_pseudo_table)
496#endif
497
498#ifndef obj_pop_insert
499#define obj_pop_insert() pop_insert(obj_pseudo_table)
500#endif
501
54cfded0
AM		 502#ifndef cfi_pop_insert
503#define cfi_pop_insert() pop_insert(cfi_pseudo_table)
504#endif
505
041ff4dd 506static void
39e6acbd 507pobegin (void)
252b5132
RH		 508{
509 po_hash = hash_new ();
510
041ff4dd 511 /* Do the target-specific pseudo ops. */
252b5132
RH		 512 pop_table_name = "md";
513 md_pop_insert ();
514
041ff4dd 515 /* Now object specific. Skip any that were in the target table. */
252b5132
RH		 516 pop_table_name = "obj";
517 pop_override_ok = 1;
518 obj_pop_insert ();
519
041ff4dd 520 /* Now portable ones. Skip any that we've seen already. */
252b5132
RH		 521 pop_table_name = "standard";
522 pop_insert (potable);
d6415f6c 523
54cfded0
AM		 524#ifdef TARGET_USE_CFIPOP
525 pop_table_name = "cfi";
526 pop_override_ok = 1;
527 cfi_pop_insert ();
528#endif
252b5132
RH		 529}
530\f
531#define HANDLE_CONDITIONAL_ASSEMBLY() \
532 if (ignore_input ()) \
533 { \
7592cfd7 534 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
40a4d956
JB		 535 input_line_pointer = (input_line_pointer <= buffer_limit \
536 && eol >= buffer_limit) \
537 ? buffer_limit \
538 : eol + 1; \
252b5132
RH		 539 continue; \
540 }
541
252b5132
RH		 542/* This function is used when scrubbing the characters between #APP
543 and #NO_APP. */
544
545static char *scrub_string;
546static char *scrub_string_end;
547
548static int
39e6acbd 549scrub_from_string (char *buf, int buflen)
252b5132 550{
2b47531b
ILT		 551 int copy;
552
553 copy = scrub_string_end - scrub_string;
554 if (copy > buflen)
555 copy = buflen;
556 memcpy (buf, scrub_string, copy);
557 scrub_string += copy;
558 return copy;
252b5132
RH		 559}
560
5e75c3ab
JB		 561/* Helper function of read_a_source_file, which tries to expand a macro. */
562static int
563try_macro (char term, const char *line)
564{
565 sb out;
566 const char *err;
567 macro_entry *macro;
568
569 if (check_macro (line, &out, &err, &macro))
570 {
571 if (err != NULL)
572 as_bad ("%s", err);
573 *input_line_pointer++ = term;
574 input_scrub_include_sb (&out,
575 input_line_pointer, 1);
576 sb_kill (&out);
577 buffer_limit =
578 input_scrub_next_buffer (&input_line_pointer);
579#ifdef md_macro_info
580 md_macro_info (macro);
581#endif
582 return 1;
583 }
584 return 0;
585}
586
041ff4dd
NC		 587/* We read the file, putting things into a web that represents what we
588 have been reading. */
589void
39e6acbd 590read_a_source_file (char *name)
252b5132 591{
91d6fa6a
NC		 592 char c;
593 char *s; /* String of symbol, '\0' appended. */
594 int temp;
252b5132
RH		 595 pseudo_typeS *pop;
596
4c400d5e
AM		 597#ifdef WARN_COMMENTS
598 found_comment = 0;
599#endif
600
252b5132
RH		 601 buffer = input_scrub_new_file (name);
602
603 listing_file (name);
604 listing_newline (NULL);
605 register_dependency (name);
606
607 /* Generate debugging information before we've read anything in to denote
608 this file as the "main" source file and not a subordinate one
609 (e.g. N_SO vs N_SOL in stabs). */
610 generate_file_debug ();
611
612 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
041ff4dd 613 { /* We have another line to parse. */
5e75c3ab
JB		 614#ifndef NO_LISTING
615 /* In order to avoid listing macro expansion lines with labels
616 multiple times, keep track of which line was last issued. */
617 static char *last_eol;
618
619 last_eol = NULL;
620#endif
252b5132
RH		 621 while (input_line_pointer < buffer_limit)
622 {
f19df8f7 623 bfd_boolean was_new_line;
041ff4dd 624 /* We have more of this buffer to parse. */
252b5132 625
041ff4dd
NC		 626 /* We now have input_line_pointer->1st char of next line.
627 If input_line_pointer [-1] == '\n' then we just
628 scanned another line: so bump line counters. */
f19df8f7
AM		 629 was_new_line = is_end_of_line[(unsigned char) input_line_pointer[-1]];
630 if (was_new_line)
252b5132
RH		 631 {
632#ifdef md_start_line_hook
633 md_start_line_hook ();
634#endif
252b5132
RH		 635 if (input_line_pointer[-1] == '\n')
636 bump_line_counters ();
f19df8f7 637 }
252b5132 638
f19df8f7
AM		 639#ifndef NO_LISTING
640 /* If listing is on, and we are expanding a macro, then give
641 the listing code the contents of the expanded line. */
642 if (listing)
643 {
644 if ((listing & LISTING_MACEXP) && macro_nest > 0)
645 {
646 /* Find the end of the current expanded macro line. */
647 s = find_end_of_line (input_line_pointer, flag_m68k_mri);
648
649 if (s != last_eol)
650 {
651 char *copy;
652 int len;
653
654 last_eol = s;
655 /* Copy it for safe keeping. Also give an indication of
656 how much macro nesting is involved at this point. */
657 len = s - input_line_pointer;
658 copy = (char *) xmalloc (len + macro_nest + 2);
659 memset (copy, '>', macro_nest);
660 copy[macro_nest] = ' ';
661 memcpy (copy + macro_nest + 1, input_line_pointer, len);
662 copy[macro_nest + 1 + len] = '\0';
663
664 /* Install the line with the listing facility. */
665 listing_newline (copy);
666 }
667 }
668 else
669 listing_newline (NULL);
670 }
671#endif
672 if (was_new_line)
673 {
252b5132
RH		 674 line_label = NULL;
675
abd63a32 676 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
252b5132
RH		 677 {
678 /* Text at the start of a line must be a label, we
679 run down and stick a colon in. */
680 if (is_name_beginner (*input_line_pointer))
681 {
682 char *line_start = input_line_pointer;
252b5132
RH		 683 int mri_line_macro;
684
252b5132
RH		 685 HANDLE_CONDITIONAL_ASSEMBLY ();
686
687 c = get_symbol_end ();
688
689 /* In MRI mode, the EQU and MACRO pseudoops must
690 be handled specially. */
691 mri_line_macro = 0;
692 if (flag_m68k_mri)
693 {
694 char *rest = input_line_pointer + 1;
695
696 if (*rest == ':')
697 ++rest;
698 if (*rest == ' ' || *rest == '\t')
699 ++rest;
700 if ((strncasecmp (rest, "EQU", 3) == 0
701 || strncasecmp (rest, "SET", 3) == 0)
702 && (rest[3] == ' ' || rest[3] == '\t'))
703 {
704 input_line_pointer = rest + 3;
705 equals (line_start,
706 strncasecmp (rest, "SET", 3) == 0);
707 continue;
708 }
709 if (strncasecmp (rest, "MACRO", 5) == 0
710 && (rest[5] == ' '
711 || rest[5] == '\t'
712 || is_end_of_line[(unsigned char) rest[5]]))
713 mri_line_macro = 1;
714 }
715
716 /* In MRI mode, we need to handle the MACRO
d6415f6c
AM		 717 pseudo-op specially: we don't want to put the
718 symbol in the symbol table. */
041ff4dd 719 if (!mri_line_macro
a25c045a 720#ifdef TC_START_LABEL_WITHOUT_COLON
ef99799a
KH		 721 && TC_START_LABEL_WITHOUT_COLON(c,
722 input_line_pointer)
a25c045a 723#endif
ef99799a 724 )
252b5132
RH		 725 line_label = colon (line_start);
726 else
727 line_label = symbol_create (line_start,
728 absolute_section,
729 (valueT) 0,
730 &zero_address_frag);
731
732 *input_line_pointer = c;
733 if (c == ':')
734 input_line_pointer++;
735 }
736 }
737 }
738
47eebc20 739 /* We are at the beginning of a line, or similar place.
041ff4dd
NC		 740 We expect a well-formed assembler statement.
741 A "symbol-name:" is a statement.
f0e652b4 742
041ff4dd
NC		 743 Depending on what compiler is used, the order of these tests
744 may vary to catch most common case 1st.
d2bdaea8
AM		 745 Each test is independent of all other tests at the (top)
746 level. */
747 do
041ff4dd 748 c = *input_line_pointer++;
d2bdaea8 749 while (c == '\t' || c == ' ' || c == '\f');
252b5132 750
041ff4dd
NC		 751 /* C is the 1st significant character.
752 Input_line_pointer points after that character. */
252b5132
RH		 753 if (is_name_beginner (c))
754 {
041ff4dd 755 /* Want user-defined label or pseudo/opcode. */
252b5132
RH		 756 HANDLE_CONDITIONAL_ASSEMBLY ();
757
758 s = --input_line_pointer;
041ff4dd
NC		 759 c = get_symbol_end (); /* name's delimiter. */
760
761 /* C is character after symbol.
d6415f6c
AM		 762 That character's place in the input line is now '\0'.
763 S points to the beginning of the symbol.
764 [In case of pseudo-op, s->'.'.]
765 Input_line_pointer->'\0' where c was. */
5e8c8f8f 766 if (TC_START_LABEL (c, s, input_line_pointer))
252b5132
RH		 767 {
768 if (flag_m68k_mri)
769 {
770 char *rest = input_line_pointer + 1;
771
772 /* In MRI mode, \tsym: set 0 is permitted. */
252b5132
RH		 773 if (*rest == ':')
774 ++rest;
f0e652b4 775
252b5132
RH		 776 if (*rest == ' ' || *rest == '\t')
777 ++rest;
f0e652b4 778
252b5132
RH		 779 if ((strncasecmp (rest, "EQU", 3) == 0
780 || strncasecmp (rest, "SET", 3) == 0)
781 && (rest[3] == ' ' || rest[3] == '\t'))
782 {
783 input_line_pointer = rest + 3;
784 equals (s, 1);
785 continue;
786 }
787 }
788
041ff4dd
NC		 789 line_label = colon (s); /* User-defined label. */
790 /* Put ':' back for error messages' sake. */
791 *input_line_pointer++ = ':';
a645d1eb
L		 792#ifdef tc_check_label
793 tc_check_label (line_label);
794#endif
041ff4dd 795 /* Input_line_pointer->after ':'. */
252b5132 796 SKIP_WHITESPACE ();
252b5132 797 }
18d7868b
HPN		 798 else if ((c == '=' && input_line_pointer[1] == '=')
799 || ((c == ' ' || c == '\t')
800 && input_line_pointer[1] == '='
801 && input_line_pointer[2] == '='))
9497f5ac
NC		 802 {
803 equals (s, -1);
804 demand_empty_rest_of_line ();
805 }
ee3c9814
CM		 806 else if ((c == '='
807 || ((c == ' ' || c == '\t')
808 && input_line_pointer[1] == '='))
809#ifdef TC_EQUAL_IN_INSN
810 && !TC_EQUAL_IN_INSN (c, s)
811#endif
812 )
252b5132
RH		 813 {
814 equals (s, 1);
815 demand_empty_rest_of_line ();
816 }
817 else
041ff4dd
NC		 818 {
819 /* Expect pseudo-op or machine instruction. */
252b5132
RH		 820 pop = NULL;
821
a8a3b3b2 822#ifndef TC_CASE_SENSITIVE
252b5132
RH		 823 {
824 char *s2 = s;
37d8bb27
NC		 825
826 strncpy (original_case_string, s2, sizeof (original_case_string));
827 original_case_string[sizeof (original_case_string) - 1] = 0;
ef99799a 828
252b5132
RH		 829 while (*s2)
830 {
3882b010 831 *s2 = TOLOWER (*s2);
252b5132
RH		 832 s2++;
833 }
834 }
835#endif
abd63a32 836 if (NO_PSEUDO_DOT || flag_m68k_mri)
252b5132 837 {
7be1c489
AM		 838 /* The MRI assembler uses pseudo-ops without
839 a period. */
252b5132
RH		 840 pop = (pseudo_typeS *) hash_find (po_hash, s);
841 if (pop != NULL && pop->poc_handler == NULL)
842 pop = NULL;
843 }
844
845 if (pop != NULL
041ff4dd 846 || (!flag_m68k_mri && *s == '.'))
252b5132 847 {
041ff4dd 848 /* PSEUDO - OP.
f0e652b4 849
d6415f6c
AM		 850 WARNING: c has next char, which may be end-of-line.
851 We lookup the pseudo-op table with s+1 because we
852 already know that the pseudo-op begins with a '.'. */
252b5132
RH		 853
854 if (pop == NULL)
855 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
e4475e39
NS		 856 if (pop && !pop->poc_handler)
857 pop = NULL;
252b5132
RH		 858
859 /* In MRI mode, we may need to insert an
d6415f6c
AM		 860 automatic alignment directive. What a hack
861 this is. */
252b5132
RH		 862 if (mri_pending_align
863 && (pop == NULL
041ff4dd
NC		 864 || !((pop->poc_handler == cons
865 && pop->poc_val == 1)
866 || (pop->poc_handler == s_space
867 && pop->poc_val == 1)
252b5132 868#ifdef tc_conditional_pseudoop
041ff4dd 869 || tc_conditional_pseudoop (pop)
252b5132 870#endif
041ff4dd
NC		 871 || pop->poc_handler == s_if
872 || pop->poc_handler == s_ifdef
873 || pop->poc_handler == s_ifc
874 || pop->poc_handler == s_ifeqs
875 || pop->poc_handler == s_else
876 || pop->poc_handler == s_endif
877 || pop->poc_handler == s_globl
878 || pop->poc_handler == s_ignore)))
252b5132
RH		 879 {
880 do_align (1, (char *) NULL, 0, 0);
881 mri_pending_align = 0;
f0e652b4 882
252b5132
RH		 883 if (line_label != NULL)
884 {
2b47531b 885 symbol_set_frag (line_label, frag_now);
252b5132
RH		 886 S_SET_VALUE (line_label, frag_now_fix ());
887 }
888 }
889
041ff4dd 890 /* Print the error msg now, while we still can. */
252b5132
RH		 891 if (pop == NULL)
892 {
5e75c3ab
JB		 893 char *end = input_line_pointer;
894
252b5132
RH		 895 *input_line_pointer = c;
896 s_ignore (0);
5e75c3ab
JB		 897 c = *--input_line_pointer;
898 *input_line_pointer = '\0';
899 if (! macro_defined || ! try_macro (c, s))
900 {
901 *end = '\0';
902 as_bad (_("unknown pseudo-op: `%s'"), s);
903 *input_line_pointer++ = c;
904 }
252b5132
RH		 905 continue;
906 }
907
041ff4dd 908 /* Put it back for error messages etc. */
252b5132
RH		 909 *input_line_pointer = c;
910 /* The following skip of whitespace is compulsory.
911 A well shaped space is sometimes all that separates
041ff4dd 912 keyword from operands. */
252b5132
RH		 913 if (c == ' ' || c == '\t')
914 input_line_pointer++;
041ff4dd
NC		 915
916 /* Input_line is restored.
d6415f6c
AM		 917 Input_line_pointer->1st non-blank char
918 after pseudo-operation. */
252b5132
RH		 919 (*pop->poc_handler) (pop->poc_val);
920
921 /* If that was .end, just get out now. */
922 if (pop->poc_handler == s_end)
923 goto quit;
924 }
925 else
926 {
041ff4dd
NC		 927 /* WARNING: c has char, which may be end-of-line. */
928 /* Also: input_line_pointer->`\0` where c was. */
252b5132 929 *input_line_pointer = c;
7592cfd7 930 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
252b5132
RH		 931 c = *input_line_pointer;
932 *input_line_pointer = '\0';
933
934 generate_lineno_debug ();
935
5e75c3ab
JB		 936 if (macro_defined && try_macro (c, s))
937 continue;
252b5132
RH		 938
939 if (mri_pending_align)
940 {
941 do_align (1, (char *) NULL, 0, 0);
942 mri_pending_align = 0;
943 if (line_label != NULL)
944 {
2b47531b 945 symbol_set_frag (line_label, frag_now);
252b5132
RH		 946 S_SET_VALUE (line_label, frag_now_fix ());
947 }
948 }
949
041ff4dd 950 md_assemble (s); /* Assemble 1 instruction. */
252b5132
RH		 951
952 *input_line_pointer++ = c;
953
954 /* We resume loop AFTER the end-of-line from
041ff4dd
NC		 955 this instruction. */
956 }
957 }
252b5132 958 continue;
041ff4dd 959 }
252b5132
RH		 960
961 /* Empty statement? */
962 if (is_end_of_line[(unsigned char) c])
963 continue;
964
3882b010 965 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
252b5132 966 {
041ff4dd 967 /* local label ("4:") */
252b5132
RH		 968 char *backup = input_line_pointer;
969
970 HANDLE_CONDITIONAL_ASSEMBLY ();
971
972 temp = c - '0';
973
041ff4dd 974 /* Read the whole number. */
3882b010 975 while (ISDIGIT (*input_line_pointer))
252b5132
RH		 976 {
977 temp = (temp * 10) + *input_line_pointer - '0';
978 ++input_line_pointer;
041ff4dd 979 }
252b5132
RH		 980
981 if (LOCAL_LABELS_DOLLAR
982 && *input_line_pointer == '$'
983 && *(input_line_pointer + 1) == ':')
984 {
985 input_line_pointer += 2;
986
987 if (dollar_label_defined (temp))
988 {
989 as_fatal (_("label \"%d$\" redefined"), temp);
990 }
991
992 define_dollar_label (temp);
993 colon (dollar_label_name (temp, 0));
994 continue;
995 }
996
997 if (LOCAL_LABELS_FB
998 && *input_line_pointer++ == ':')
999 {
1000 fb_label_instance_inc (temp);
1001 colon (fb_label_name (temp, 0));
1002 continue;
1003 }
1004
1005 input_line_pointer = backup;
1006 } /* local label ("4:") */
1007
1008 if (c && strchr (line_comment_chars, c))
041ff4dd 1009 { /* Its a comment. Better say APP or NO_APP. */
64e55042 1010 sb sbuf;
252b5132
RH		 1011 char *ends;
1012 char *new_buf;
1013 char *new_tmp;
1014 unsigned int new_length;
1015 char *tmp_buf = 0;
1016
252b5132
RH		 1017 s = input_line_pointer;
1018 if (strncmp (s, "APP\n", 4))
601e61cd
NC		 1019 {
1020 /* We ignore it. */
1021 ignore_rest_of_line ();
1022 continue;
1023 }
1024 bump_line_counters ();
252b5132
RH		 1025 s += 4;
1026
64e55042 1027 sb_new (&sbuf);
252b5132
RH		 1028 ends = strstr (s, "#NO_APP\n");
1029
1030 if (!ends)
1031 {
1032 unsigned int tmp_len;
1033 unsigned int num;
1034
1035 /* The end of the #APP wasn't in this buffer. We
1036 keep reading in buffers until we find the #NO_APP
1037 that goes with this #APP There is one. The specs
47eebc20 1038 guarantee it... */
252b5132 1039 tmp_len = buffer_limit - s;
1e9cc1c2 1040 tmp_buf = (char *) xmalloc (tmp_len + 1);
252b5132
RH		 1041 memcpy (tmp_buf, s, tmp_len);
1042 do
1043 {
1044 new_tmp = input_scrub_next_buffer (&buffer);
1045 if (!new_tmp)
1046 break;
1047 else
1048 buffer_limit = new_tmp;
1049 input_line_pointer = buffer;
1050 ends = strstr (buffer, "#NO_APP\n");
1051 if (ends)
1052 num = ends - buffer;
1053 else
1054 num = buffer_limit - buffer;
1055
1e9cc1c2 1056 tmp_buf = (char *) xrealloc (tmp_buf, tmp_len + num);
252b5132
RH		 1057 memcpy (tmp_buf + tmp_len, buffer, num);
1058 tmp_len += num;
1059 }
1060 while (!ends);
1061
1062 input_line_pointer = ends ? ends + 8 : NULL;
1063
1064 s = tmp_buf;
1065 ends = s + tmp_len;
1066
1067 }
1068 else
1069 {
1070 input_line_pointer = ends + 8;
1071 }
1072
1073 scrub_string = s;
1074 scrub_string_end = ends;
1075
1076 new_length = ends - s;
1077 new_buf = (char *) xmalloc (new_length);
1078 new_tmp = new_buf;
1079 for (;;)
1080 {
1081 int space;
1082 int size;
1083
1084 space = (new_buf + new_length) - new_tmp;
1085 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1086
1087 if (size < space)
1088 {
64e55042 1089 new_tmp[size] = 0;
252b5132
RH		 1090 break;
1091 }
1092
1e9cc1c2 1093 new_buf = (char *) xrealloc (new_buf, new_length + 100);
252b5132
RH		 1094 new_tmp = new_buf + new_length;
1095 new_length += 100;
1096 }
1097
1098 if (tmp_buf)
1099 free (tmp_buf);
f0e652b4 1100
64e55042
HPN		 1101 /* We've "scrubbed" input to the preferred format. In the
1102 process we may have consumed the whole of the remaining
1103 file (and included files). We handle this formatted
1104 input similar to that of macro expansion, letting
1105 actual macro expansion (possibly nested) and other
1106 input expansion work. Beware that in messages, line
1107 numbers and possibly file names will be incorrect. */
1108 sb_add_string (&sbuf, new_buf);
1109 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1110 sb_kill (&sbuf);
1111 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1112 free (new_buf);
252b5132
RH		 1113 continue;
1114 }
1115
1116 HANDLE_CONDITIONAL_ASSEMBLY ();
1117
1118#ifdef tc_unrecognized_line
1119 if (tc_unrecognized_line (c))
1120 continue;
1121#endif
0e389e77 1122 input_line_pointer--;
601e61cd 1123 /* Report unknown char as error. */
c95b35a9 1124 demand_empty_rest_of_line ();
041ff4dd 1125 }
252b5132
RH		 1126
1127#ifdef md_after_pass_hook
1128 md_after_pass_hook ();
1129#endif
041ff4dd 1130 }
252b5132
RH		 1131
1132 quit:
1133
1134#ifdef md_cleanup
041ff4dd 1135 md_cleanup ();
252b5132 1136#endif
041ff4dd
NC		 1137 /* Close the input file. */
1138 input_scrub_close ();
4c400d5e
AM		 1139#ifdef WARN_COMMENTS
1140 {
1141 if (warn_comment && found_comment)
1142 as_warn_where (found_comment_file, found_comment,
1143 "first comment found here");
1144 }
1145#endif
252b5132
RH		 1146}
1147
e5604d79
RS		 1148/* Convert O_constant expression EXP into the equivalent O_big representation.
1149 Take the sign of the number from X_unsigned rather than X_add_number. */
1150
1151static void
1152convert_to_bignum (expressionS *exp)
1153{
1154 valueT value;
1155 unsigned int i;
1156
1157 value = exp->X_add_number;
1158 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1159 {
1160 generic_bignum[i] = value & LITTLENUM_MASK;
1161 value >>= LITTLENUM_NUMBER_OF_BITS;
1162 }
1163 /* Add a sequence of sign bits if the top bit of X_add_number is not
1164 the sign of the original value. */
1165 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1166 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1167 exp->X_op = O_big;
1168 exp->X_add_number = i;
1169}
1170
252b5132
RH		 1171/* For most MRI pseudo-ops, the line actually ends at the first
1172 nonquoted space. This function looks for that point, stuffs a null
1173 in, and sets *STOPCP to the character that used to be there, and
1174 returns the location.
1175
1176 Until I hear otherwise, I am going to assume that this is only true
1177 for the m68k MRI assembler. */
1178
1179char *
39e6acbd 1180mri_comment_field (char *stopcp)
252b5132 1181{
252b5132 1182 char *s;
041ff4dd 1183#ifdef TC_M68K
252b5132
RH		 1184 int inquote = 0;
1185
1186 know (flag_m68k_mri);
1187
1188 for (s = input_line_pointer;
041ff4dd 1189 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
252b5132
RH		 1190 || inquote);
1191 s++)
1192 {
1193 if (*s == '\'')
041ff4dd 1194 inquote = !inquote;
252b5132 1195 }
252b5132 1196#else
041ff4dd
NC		 1197 for (s = input_line_pointer;
1198 !is_end_of_line[(unsigned char) *s];
1199 s++)
252b5132 1200 ;
041ff4dd 1201#endif
252b5132
RH		 1202 *stopcp = *s;
1203 *s = '\0';
f0e652b4 1204
252b5132 1205 return s;
252b5132
RH		 1206}
1207
1208/* Skip to the end of an MRI comment field. */
1209
1210void
39e6acbd 1211mri_comment_end (char *stop, int stopc)
252b5132
RH		 1212{
1213 know (flag_mri);
1214
1215 input_line_pointer = stop;
1216 *stop = stopc;
041ff4dd 1217 while (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 1218 ++input_line_pointer;
1219}
1220
041ff4dd 1221void
39e6acbd 1222s_abort (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1223{
1224 as_fatal (_(".abort detected. Abandoning ship."));
1225}
1226
1227/* Guts of .align directive. N is the power of two to which to align.
1228 FILL may be NULL, or it may point to the bytes of the fill pattern.
1229 LEN is the length of whatever FILL points to, if anything. MAX is
1230 the maximum number of characters to skip when doing the alignment,
1231 or 0 if there is no maximum. */
1232
041ff4dd 1233static void
39e6acbd 1234do_align (int n, char *fill, int len, int max)
252b5132 1235{
ebeb9253
AM		 1236 if (now_seg == absolute_section)
1237 {
1238 if (fill != NULL)
1239 while (len-- > 0)
1240 if (*fill++ != '\0')
1241 {
1242 as_warn (_("ignoring fill value in absolute section"));
1243 break;
1244 }
1245 fill = NULL;
1246 len = 0;
1247 }
1248
b8861cfb
NS		 1249#ifdef md_flush_pending_output
1250 md_flush_pending_output ();
1251#endif
252b5132
RH		 1252#ifdef md_do_align
1253 md_do_align (n, fill, len, max, just_record_alignment);
1254#endif
1255
041ff4dd 1256 /* Only make a frag if we HAVE to... */
252b5132
RH		 1257 if (n != 0 && !need_pass_2)
1258 {
0a9ef439
RH		 1259 if (fill == NULL)
1260 {
1261 if (subseg_text_p (now_seg))
1262 frag_align_code (n, max);
1263 else
1264 frag_align (n, 0, max);
1265 }
1266 else if (len <= 1)
252b5132
RH		 1267 frag_align (n, *fill, max);
1268 else
1269 frag_align_pattern (n, fill, len, max);
1270 }
1271
1272#ifdef md_do_align
a6bd2a4f 1273 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
252b5132
RH		 1274#endif
1275
bea9907b 1276 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
252b5132
RH		 1277}
1278
1279/* Handle the .align pseudo-op. A positive ARG is a default alignment
1280 (in bytes). A negative ARG is the negative of the length of the
1281 fill pattern. BYTES_P is non-zero if the alignment value should be
1282 interpreted as the byte boundary, rather than the power of 2. */
11ec4ba9
DS		 1283#ifndef TC_ALIGN_LIMIT
1284#define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1285#endif
9ebd302d 1286
252b5132 1287static void
39e6acbd 1288s_align (int arg, int bytes_p)
252b5132 1289{
11ec4ba9 1290 unsigned int align_limit = TC_ALIGN_LIMIT;
9ebd302d 1291 unsigned int align;
252b5132 1292 char *stop = NULL;
fb25138b 1293 char stopc = 0;
252b5132
RH		 1294 offsetT fill = 0;
1295 int max;
1296 int fill_p;
1297
1298 if (flag_mri)
1299 stop = mri_comment_field (&stopc);
1300
1301 if (is_end_of_line[(unsigned char) *input_line_pointer])
1302 {
1303 if (arg < 0)
1304 align = 0;
1305 else
041ff4dd 1306 align = arg; /* Default value from pseudo-op table. */
252b5132
RH		 1307 }
1308 else
1309 {
1310 align = get_absolute_expression ();
1311 SKIP_WHITESPACE ();
1312 }
1313
1314 if (bytes_p)
1315 {
1316 /* Convert to a power of 2. */
1317 if (align != 0)
1318 {
1319 unsigned int i;
1320
1321 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1322 ;
1323 if (align != 1)
0e389e77 1324 as_bad (_("alignment not a power of 2"));
f0e652b4 1325
252b5132
RH		 1326 align = i;
1327 }
1328 }
1329
b617dc20 1330 if (align > align_limit)
252b5132 1331 {
b617dc20 1332 align = align_limit;
0e389e77 1333 as_warn (_("alignment too large: %u assumed"), align);
252b5132
RH		 1334 }
1335
1336 if (*input_line_pointer != ',')
1337 {
1338 fill_p = 0;
1339 max = 0;
1340 }
1341 else
1342 {
1343 ++input_line_pointer;
1344 if (*input_line_pointer == ',')
1345 fill_p = 0;
1346 else
1347 {
1348 fill = get_absolute_expression ();
1349 SKIP_WHITESPACE ();
1350 fill_p = 1;
1351 }
1352
1353 if (*input_line_pointer != ',')
1354 max = 0;
1355 else
1356 {
1357 ++input_line_pointer;
1358 max = get_absolute_expression ();
1359 }
1360 }
1361
041ff4dd 1362 if (!fill_p)
252b5132
RH		 1363 {
1364 if (arg < 0)
1365 as_warn (_("expected fill pattern missing"));
1366 do_align (align, (char *) NULL, 0, max);
1367 }
1368 else
1369 {
1370 int fill_len;
1371
1372 if (arg >= 0)
1373 fill_len = 1;
1374 else
041ff4dd 1375 fill_len = -arg;
252b5132
RH		 1376 if (fill_len <= 1)
1377 {
1378 char fill_char;
1379
1380 fill_char = fill;
1381 do_align (align, &fill_char, fill_len, max);
1382 }
1383 else
1384 {
1385 char ab[16];
1386
1387 if ((size_t) fill_len > sizeof ab)
1388 abort ();
1389 md_number_to_chars (ab, fill, fill_len);
1390 do_align (align, ab, fill_len, max);
1391 }
1392 }
1393
1394 demand_empty_rest_of_line ();
1395
1396 if (flag_mri)
1397 mri_comment_end (stop, stopc);
1398}
1399
1400/* Handle the .align pseudo-op on machines where ".align 4" means
1401 align to a 4 byte boundary. */
1402
041ff4dd 1403void
39e6acbd 1404s_align_bytes (int arg)
252b5132
RH		 1405{
1406 s_align (arg, 1);
1407}
1408
1409/* Handle the .align pseudo-op on machines where ".align 4" means align
1410 to a 2**4 boundary. */
1411
041ff4dd 1412void
39e6acbd 1413s_align_ptwo (int arg)
252b5132
RH		 1414{
1415 s_align (arg, 0);
1416}
1417
caa32fe5
NC		 1418/* Switch in and out of alternate macro mode. */
1419
1420void
1421s_altmacro (int on)
1422{
1423 demand_empty_rest_of_line ();
1424 macro_set_alternate (on);
1425}
1426
e13bab5a
AM		 1427symbolS *
1428s_comm_internal (int param,
1429 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
252b5132 1430{
e13bab5a
AM		 1431 char *name;
1432 char c;
1433 char *p;
1434 offsetT temp, size;
1435 symbolS *symbolP = NULL;
252b5132 1436 char *stop = NULL;
fb25138b 1437 char stopc = 0;
e13bab5a 1438 expressionS exp;
252b5132
RH		 1439
1440 if (flag_mri)
1441 stop = mri_comment_field (&stopc);
1442
1443 name = input_line_pointer;
1444 c = get_symbol_end ();
041ff4dd 1445 /* Just after name is now '\0'. */
252b5132
RH		 1446 p = input_line_pointer;
1447 *p = c;
0e389e77
AM		 1448
1449 if (name == p)
1450 {
1451 as_bad (_("expected symbol name"));
40a4d956 1452 ignore_rest_of_line ();
e13bab5a 1453 goto out;
0e389e77
AM		 1454 }
1455
252b5132 1456 SKIP_WHITESPACE ();
f0e652b4 1457
e13bab5a
AM		 1458 /* Accept an optional comma after the name. The comma used to be
1459 required, but Irix 5 cc does not generate it for .lcomm. */
1460 if (*input_line_pointer == ',')
1461 input_line_pointer++;
1462
e13bab5a
AM		 1463 temp = get_absolute_expr (&exp);
1464 size = temp;
e13bab5a 1465 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
e13bab5a 1466 if (exp.X_op == O_absent)
252b5132 1467 {
e13bab5a 1468 as_bad (_("missing size expression"));
252b5132 1469 ignore_rest_of_line ();
e13bab5a 1470 goto out;
252b5132 1471 }
e13bab5a 1472 else if (temp != size || !exp.X_unsigned)
252b5132 1473 {
e13bab5a 1474 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
252b5132 1475 ignore_rest_of_line ();
e13bab5a 1476 goto out;
252b5132 1477 }
f0e652b4 1478
a207757e 1479 *p = 0;
252b5132 1480 symbolP = symbol_find_or_make (name);
92757bc9
JB		 1481 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1482 && !S_IS_COMMON (symbolP))
252b5132 1483 {
92757bc9
JB		 1484 if (!S_IS_VOLATILE (symbolP))
1485 {
1486 symbolP = NULL;
1487 as_bad (_("symbol `%s' is already defined"), name);
1488 *p = c;
1489 ignore_rest_of_line ();
1490 goto out;
1491 }
89cdfe57 1492 symbolP = symbol_clone (symbolP, 1);
92757bc9
JB		 1493 S_SET_SEGMENT (symbolP, undefined_section);
1494 S_SET_VALUE (symbolP, 0);
1495 symbol_set_frag (symbolP, &zero_address_frag);
1496 S_CLEAR_VOLATILE (symbolP);
252b5132 1497 }
f0e652b4 1498
e13bab5a
AM		 1499 size = S_GET_VALUE (symbolP);
1500 if (size == 0)
1501 size = temp;
1502 else if (size != temp)
1503 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1504 name, (long) size, (long) temp);
1505
1506 *p = c;
1507 if (comm_parse_extra != NULL)
1508 symbolP = (*comm_parse_extra) (param, symbolP, size);
252b5132
RH		 1509 else
1510 {
e13bab5a 1511 S_SET_VALUE (symbolP, (valueT) size);
252b5132 1512 S_SET_EXTERNAL (symbolP);
9eda1ce9 1513 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
252b5132 1514#ifdef OBJ_VMS
e13bab5a
AM		 1515 {
1516 extern int flag_one;
1517 if (size == 0 || !flag_one)
1518 S_GET_OTHER (symbolP) = const_flag;
1519 }
1520#endif
1521 }
252b5132
RH		 1522
1523 demand_empty_rest_of_line ();
e13bab5a 1524 out:
252b5132
RH		 1525 if (flag_mri)
1526 mri_comment_end (stop, stopc);
e13bab5a
AM		 1527 return symbolP;
1528}
1529
1530void
1531s_comm (int ignore)
1532{
1533 s_comm_internal (ignore, NULL);
1534}
252b5132
RH		 1535
1536/* The MRI COMMON pseudo-op. We handle this by creating a common
1537 symbol with the appropriate name. We make s_space do the right
1538 thing by increasing the size. */
1539
1540void
39e6acbd 1541s_mri_common (int small ATTRIBUTE_UNUSED)
252b5132
RH		 1542{
1543 char *name;
1544 char c;
1545 char *alc = NULL;
1546 symbolS *sym;
1547 offsetT align;
1548 char *stop = NULL;
fb25138b 1549 char stopc = 0;
252b5132 1550
041ff4dd 1551 if (!flag_mri)
252b5132
RH		 1552 {
1553 s_comm (0);
1554 return;
1555 }
1556
1557 stop = mri_comment_field (&stopc);
1558
1559 SKIP_WHITESPACE ();
1560
1561 name = input_line_pointer;
3882b010 1562 if (!ISDIGIT (*name))
252b5132
RH		 1563 c = get_symbol_end ();
1564 else
1565 {
1566 do
1567 {
1568 ++input_line_pointer;
1569 }
3882b010 1570 while (ISDIGIT (*input_line_pointer));
f0e652b4 1571
252b5132
RH		 1572 c = *input_line_pointer;
1573 *input_line_pointer = '\0';
1574
1575 if (line_label != NULL)
1576 {
1577 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1578 + (input_line_pointer - name)
1579 + 1);
1580 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1581 name = alc;
1582 }
1583 }
1584
1585 sym = symbol_find_or_make (name);
1586 *input_line_pointer = c;
1587 if (alc != NULL)
1588 free (alc);
1589
1590 if (*input_line_pointer != ',')
1591 align = 0;
1592 else
1593 {
1594 ++input_line_pointer;
1595 align = get_absolute_expression ();
1596 }
1597
041ff4dd 1598 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
252b5132 1599 {
0e389e77 1600 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
252b5132
RH		 1601 ignore_rest_of_line ();
1602 mri_comment_end (stop, stopc);
1603 return;
1604 }
1605
1606 S_SET_EXTERNAL (sym);
9eda1ce9 1607 S_SET_SEGMENT (sym, bfd_com_section_ptr);
252b5132
RH		 1608 mri_common_symbol = sym;
1609
1610#ifdef S_SET_ALIGN
1611 if (align != 0)
1612 S_SET_ALIGN (sym, align);
1613#endif
1614
1615 if (line_label != NULL)
1616 {
2b47531b
ILT		 1617 expressionS exp;
1618 exp.X_op = O_symbol;
1619 exp.X_add_symbol = sym;
1620 exp.X_add_number = 0;
1621 symbol_set_value_expression (line_label, &exp);
1622 symbol_set_frag (line_label, &zero_address_frag);
252b5132
RH		 1623 S_SET_SEGMENT (line_label, expr_section);
1624 }
1625
1626 /* FIXME: We just ignore the small argument, which distinguishes
1627 COMMON and COMMON.S. I don't know what we can do about it. */
1628
1629 /* Ignore the type and hptype. */
1630 if (*input_line_pointer == ',')
1631 input_line_pointer += 2;
1632 if (*input_line_pointer == ',')
1633 input_line_pointer += 2;
1634
1635 demand_empty_rest_of_line ();
1636
1637 mri_comment_end (stop, stopc);
1638}
1639
1640void
39e6acbd 1641s_data (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1642{
1643 segT section;
3d540e93 1644 int temp;
252b5132
RH		 1645
1646 temp = get_absolute_expression ();
1647 if (flag_readonly_data_in_text)
1648 {
1649 section = text_section;
1650 temp += 1000;
1651 }
1652 else
1653 section = data_section;
1654
1655 subseg_set (section, (subsegT) temp);
1656
1657#ifdef OBJ_VMS
1658 const_flag = 0;
1659#endif
1660 demand_empty_rest_of_line ();
1661}
1662
1663/* Handle the .appfile pseudo-op. This is automatically generated by
1664 do_scrub_chars when a preprocessor # line comment is seen with a
1665 file name. This default definition may be overridden by the object
1666 or CPU specific pseudo-ops. This function is also the default
1667 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1668 .file. */
1669
ecb4347a 1670void
f17c130b 1671s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
ecb4347a
DJ		 1672{
1673#ifdef LISTING
1674 if (listing)
1675 listing_source_file (file);
1676#endif
1677 register_dependency (file);
1678#ifdef obj_app_file
c04f5787 1679 obj_app_file (file, appfile);
ecb4347a
DJ		 1680#endif
1681}
1682
041ff4dd 1683void
39e6acbd 1684s_app_file (int appfile)
252b5132 1685{
3d540e93 1686 char *s;
252b5132
RH		 1687 int length;
1688
041ff4dd 1689 /* Some assemblers tolerate immediately following '"'. */
252b5132
RH		 1690 if ((s = demand_copy_string (&length)) != 0)
1691 {
252b5132 1692 int may_omit
93e914b2 1693 = (!new_logical_line_flags (s, -1, 1) && appfile);
252b5132
RH		 1694
1695 /* In MRI mode, the preprocessor may have inserted an extraneous
d6415f6c 1696 backquote. */
252b5132
RH		 1697 if (flag_m68k_mri
1698 && *input_line_pointer == '\''
1699 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1700 ++input_line_pointer;
1701
1702 demand_empty_rest_of_line ();
041ff4dd 1703 if (!may_omit)
c04f5787 1704 s_app_file_string (s, appfile);
252b5132
RH		 1705 }
1706}
1707
e9fc6c21
AO		 1708static int
1709get_linefile_number (int *flag)
1710{
1711 SKIP_WHITESPACE ();
1712
1713 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1714 return 0;
1715
1716 *flag = get_absolute_expression ();
1717
1718 return 1;
1719}
1720
252b5132
RH		 1721/* Handle the .appline pseudo-op. This is automatically generated by
1722 do_scrub_chars when a preprocessor # line comment is seen. This
1723 default definition may be overridden by the object or CPU specific
1724 pseudo-ops. */
1725
1726void
93e914b2 1727s_app_line (int appline)
252b5132 1728{
e9fc6c21 1729 char *file = NULL;
252b5132
RH		 1730 int l;
1731
1732 /* The given number is that of the next line. */
e9fc6c21
AO		 1733 if (appline)
1734 l = get_absolute_expression ();
1735 else if (!get_linefile_number (&l))
1736 {
1737 ignore_rest_of_line ();
1738 return;
1739 }
1740
1741 l--;
47837f8e
NC		 1742
1743 if (l < -1)
252b5132 1744 /* Some of the back ends can't deal with non-positive line numbers.
47837f8e
NC		 1745 Besides, it's silly. GCC however will generate a line number of
1746 zero when it is pre-processing builtins for assembler-with-cpp files:
1747
1748 # 0 "<built-in>"
1749
1750 We do not want to barf on this, especially since such files are used
1751 in the GCC and GDB testsuites. So we check for negative line numbers
1752 rather than non-positive line numbers. */
0e389e77 1753 as_warn (_("line numbers must be positive; line number %d rejected"),
041ff4dd 1754 l + 1);
252b5132
RH		 1755 else
1756 {
93e914b2 1757 int flags = 0;
93e914b2
AO		 1758 int length = 0;
1759
1760 if (!appline)
1761 {
e9fc6c21
AO		 1762 SKIP_WHITESPACE ();
1763
1764 if (*input_line_pointer == '"')
1765 file = demand_copy_string (&length);
93e914b2
AO		 1766
1767 if (file)
1768 {
1769 int this_flag;
1770
e9fc6c21 1771 while (get_linefile_number (&this_flag))
93e914b2
AO		 1772 switch (this_flag)
1773 {
1774 /* From GCC's cpp documentation:
1775 1: start of a new file.
1776 2: returning to a file after having included
1777 another file.
1778 3: following text comes from a system header file.
1779 4: following text should be treated as extern "C".
1780
1781 4 is nonsensical for the assembler; 3, we don't
1782 care about, so we ignore it just in case a
1783 system header file is included while
1784 preprocessing assembly. So 1 and 2 are all we
1785 care about, and they are mutually incompatible.
1786 new_logical_line_flags() demands this. */
1787 case 1:
1788 case 2:
1789 if (flags && flags != (1 << this_flag))
1790 as_warn (_("incompatible flag %i in line directive"),
1791 this_flag);
1792 else
1793 flags |= 1 << this_flag;
1794 break;
1795
1796 case 3:
1797 case 4:
1798 /* We ignore these. */
1799 break;
1800
1801 default:
1802 as_warn (_("unsupported flag %i in line directive"),
1803 this_flag);
1804 break;
1805 }
e9fc6c21
AO		 1806
1807 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1808 file = 0;
93e914b2
AO		 1809 }
1810 }
1811
e9fc6c21
AO		 1812 if (appline || file)
1813 {
1814 new_logical_line_flags (file, l, flags);
252b5132 1815#ifdef LISTING
e9fc6c21
AO		 1816 if (listing)
1817 listing_source_line (l);
252b5132 1818#endif
e9fc6c21 1819 }
252b5132 1820 }
e9fc6c21
AO		 1821 if (appline || file)
1822 demand_empty_rest_of_line ();
1823 else
1824 ignore_rest_of_line ();
252b5132
RH		 1825}
1826
1827/* Handle the .end pseudo-op. Actually, the real work is done in
1828 read_a_source_file. */
1829
1830void
39e6acbd 1831s_end (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1832{
1833 if (flag_mri)
1834 {
1835 /* The MRI assembler permits the start symbol to follow .end,
d6415f6c 1836 but we don't support that. */
252b5132 1837 SKIP_WHITESPACE ();
041ff4dd 1838 if (!is_end_of_line[(unsigned char) *input_line_pointer]
252b5132
RH		 1839 && *input_line_pointer != '*'
1840 && *input_line_pointer != '!')
1841 as_warn (_("start address not supported"));
1842 }
1843}
1844
1845/* Handle the .err pseudo-op. */
1846
1847void
39e6acbd 1848s_err (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1849{
1850 as_bad (_(".err encountered"));
1851 demand_empty_rest_of_line ();
d190d046
HPN		 1852}
1853
1854/* Handle the .error and .warning pseudo-ops. */
1855
1856void
1857s_errwarn (int err)
1858{
1859 int len;
1860 /* The purpose for the conditional assignment is not to
1861 internationalize the directive itself, but that we need a
1862 self-contained message, one that can be passed like the
1863 demand_copy_C_string return value, and with no assumption on the
1864 location of the name of the directive within the message. */
1865 char *msg
1866 = (err ? _(".error directive invoked in source file")
1867 : _(".warning directive invoked in source file"));
1868
1869 if (!is_it_end_of_statement ())
1870 {
1871 if (*input_line_pointer != '\"')
1872 {
1873 as_bad (_("%s argument must be a string"),
1874 err ? ".error" : ".warning");
40a4d956 1875 ignore_rest_of_line ();
d190d046
HPN		 1876 return;
1877 }
1878
1879 msg = demand_copy_C_string (&len);
1880 if (msg == NULL)
1881 return;
1882 }
1883
1884 if (err)
1885 as_bad ("%s", msg);
1886 else
1887 as_warn ("%s", msg);
1888 demand_empty_rest_of_line ();
252b5132
RH		 1889}
1890
1891/* Handle the MRI fail pseudo-op. */
1892
1893void
39e6acbd 1894s_fail (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1895{
1896 offsetT temp;
1897 char *stop = NULL;
fb25138b 1898 char stopc = 0;
252b5132
RH		 1899
1900 if (flag_mri)
1901 stop = mri_comment_field (&stopc);
1902
1903 temp = get_absolute_expression ();
1904 if (temp >= 500)
1905 as_warn (_(".fail %ld encountered"), (long) temp);
1906 else
1907 as_bad (_(".fail %ld encountered"), (long) temp);
1908
1909 demand_empty_rest_of_line ();
1910
1911 if (flag_mri)
1912 mri_comment_end (stop, stopc);
1913}
1914
041ff4dd 1915void
39e6acbd 1916s_fill (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 1917{
1918 expressionS rep_exp;
1919 long size = 1;
3d540e93 1920 long fill = 0;
252b5132
RH		 1921 char *p;
1922
1923#ifdef md_flush_pending_output
1924 md_flush_pending_output ();
1925#endif
1926
cc3f603a
JM		 1927#ifdef md_cons_align
1928 md_cons_align (1);
1929#endif
1930
252b5132
RH		 1931 get_known_segmented_expression (&rep_exp);
1932 if (*input_line_pointer == ',')
1933 {
1934 input_line_pointer++;
1935 size = get_absolute_expression ();
1936 if (*input_line_pointer == ',')
1937 {
1938 input_line_pointer++;
1939 fill = get_absolute_expression ();
1940 }
1941 }
1942
1943 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1944#define BSD_FILL_SIZE_CROCK_8 (8)
1945 if (size > BSD_FILL_SIZE_CROCK_8)
1946 {
0e389e77 1947 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
252b5132
RH		 1948 size = BSD_FILL_SIZE_CROCK_8;
1949 }
1950 if (size < 0)
1951 {
0e389e77 1952 as_warn (_("size negative; .fill ignored"));
252b5132
RH		 1953 size = 0;
1954 }
1955 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1956 {
1957 if (rep_exp.X_add_number < 0)
0e389e77 1958 as_warn (_("repeat < 0; .fill ignored"));
252b5132
RH		 1959 size = 0;
1960 }
1961
1962 if (size && !need_pass_2)
1963 {
1964 if (rep_exp.X_op == O_constant)
1965 {
1966 p = frag_var (rs_fill, (int) size, (int) size,
1967 (relax_substateT) 0, (symbolS *) 0,
1968 (offsetT) rep_exp.X_add_number,
1969 (char *) 0);
1970 }
1971 else
1972 {
1973 /* We don't have a constant repeat count, so we can't use
1974 rs_fill. We can get the same results out of rs_space,
1975 but its argument is in bytes, so we must multiply the
1976 repeat count by size. */
1977
1978 symbolS *rep_sym;
1979 rep_sym = make_expr_symbol (&rep_exp);
1980 if (size != 1)
1981 {
1982 expressionS size_exp;
1983 size_exp.X_op = O_constant;
1984 size_exp.X_add_number = size;
1985
1986 rep_exp.X_op = O_multiply;
1987 rep_exp.X_add_symbol = rep_sym;
1988 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1989 rep_exp.X_add_number = 0;
1990 rep_sym = make_expr_symbol (&rep_exp);
1991 }
1992
1993 p = frag_var (rs_space, (int) size, (int) size,
1994 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1995 }
f0e652b4 1996
252b5132 1997 memset (p, 0, (unsigned int) size);
f0e652b4 1998
252b5132 1999 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
d6415f6c
AM		 2000 flavoured AS. The following bizarre behaviour is to be
2001 compatible with above. I guess they tried to take up to 8
2002 bytes from a 4-byte expression and they forgot to sign
2003 extend. */
252b5132
RH		 2004#define BSD_FILL_SIZE_CROCK_4 (4)
2005 md_number_to_chars (p, (valueT) fill,
2006 (size > BSD_FILL_SIZE_CROCK_4
2007 ? BSD_FILL_SIZE_CROCK_4
2008 : (int) size));
2009 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
d6415f6c
AM		 2010 but emits no error message because it seems a legal thing to do.
2011 It is a degenerate case of .fill but could be emitted by a
041ff4dd 2012 compiler. */
252b5132
RH		 2013 }
2014 demand_empty_rest_of_line ();
2015}
2016
041ff4dd 2017void
39e6acbd 2018s_globl (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2019{
2020 char *name;
2021 int c;
2022 symbolS *symbolP;
2023 char *stop = NULL;
fb25138b 2024 char stopc = 0;
252b5132
RH		 2025
2026 if (flag_mri)
2027 stop = mri_comment_field (&stopc);
2028
2029 do
2030 {
2031 name = input_line_pointer;
2032 c = get_symbol_end ();
2033 symbolP = symbol_find_or_make (name);
58b5739a
RH		 2034 S_SET_EXTERNAL (symbolP);
2035
252b5132
RH		 2036 *input_line_pointer = c;
2037 SKIP_WHITESPACE ();
58b5739a 2038 c = *input_line_pointer;
252b5132
RH		 2039 if (c == ',')
2040 {
2041 input_line_pointer++;
2042 SKIP_WHITESPACE ();
0e389e77 2043 if (is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 2044 c = '\n';
2045 }
2046 }
2047 while (c == ',');
2048
2049 demand_empty_rest_of_line ();
2050
2051 if (flag_mri)
2052 mri_comment_end (stop, stopc);
2053}
2054
104d59d1
JM		 2055#ifdef OBJ_ELF
2056#define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2057
2058static inline int
2059skip_past_char (char ** str, char c)
2060{
2061 if (**str == c)
2062 {
2063 (*str)++;
2064 return 0;
2065 }
2066 else
2067 return -1;
2068}
2069#define skip_past_comma(str) skip_past_char (str, ',')
2070
ee3c0378
AS		 2071/* Parse an attribute directive for VENDOR.
2072 Returns the attribute number read, or zero on error. */
2073int
104d59d1
JM		 2074s_vendor_attribute (int vendor)
2075{
2076 expressionS exp;
2077 int type;
2078 int tag;
2079 unsigned int i = 0;
2080 char *s = NULL;
104d59d1 2081
e04befd0
AS		 2082 /* Read the first number or name. */
2083 skip_whitespace (input_line_pointer);
2084 s = input_line_pointer;
2085 if (ISDIGIT (*input_line_pointer))
2086 {
2087 expression (& exp);
2088 if (exp.X_op != O_constant)
2089 goto bad;
2090 tag = exp.X_add_number;
2091 }
2092 else
2093 {
2094 char *name;
2095
2096 /* A name may contain '_', but no other punctuation. */
2097 for (; ISALNUM (*input_line_pointer) || *input_line_pointer == '_';
2098 ++input_line_pointer)
2099 i++;
2100 if (i == 0)
2101 goto bad;
2102
1e9cc1c2 2103 name = (char *) alloca (i + 1);
e04befd0
AS		 2104 memcpy (name, s, i);
2105 name[i] = '\0';
2106
2107#ifndef CONVERT_SYMBOLIC_ATTRIBUTE
2108#define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
2109#endif
2110
2111 tag = CONVERT_SYMBOLIC_ATTRIBUTE (name);
2112 if (tag == -1)
2113 {
2114 as_bad (_("Attribute name not recognised: %s"), name);
2115 ignore_rest_of_line ();
ee3c0378 2116 return 0;
e04befd0
AS		 2117 }
2118 }
104d59d1 2119
104d59d1
JM		 2120 type = _bfd_elf_obj_attrs_arg_type (stdoutput, vendor, tag);
2121
2122 if (skip_past_comma (&input_line_pointer) == -1)
2123 goto bad;
2124 if (type & 1)
2125 {
2126 expression (& exp);
2127 if (exp.X_op != O_constant)
2128 {
2129 as_bad (_("expected numeric constant"));
2130 ignore_rest_of_line ();
ee3c0378 2131 return 0;
104d59d1
JM		 2132 }
2133 i = exp.X_add_number;
2134 }
2d0bb761 2135 if ((type & 3) == 3
104d59d1
JM		 2136 && skip_past_comma (&input_line_pointer) == -1)
2137 {
2138 as_bad (_("expected comma"));
2139 ignore_rest_of_line ();
ee3c0378 2140 return 0;
104d59d1
JM		 2141 }
2142 if (type & 2)
2143 {
e04befd0
AS		 2144 int len;
2145
2146 skip_whitespace (input_line_pointer);
104d59d1
JM		 2147 if (*input_line_pointer != '"')
2148 goto bad_string;
e04befd0 2149 s = demand_copy_C_string (&len);
104d59d1
JM		 2150 }
2151
2d0bb761 2152 switch (type & 3)
104d59d1
JM		 2153 {
2154 case 3:
7b86a9fa 2155 bfd_elf_add_obj_attr_int_string (stdoutput, vendor, tag, i, s);
104d59d1
JM		 2156 break;
2157 case 2:
2158 bfd_elf_add_obj_attr_string (stdoutput, vendor, tag, s);
2159 break;
2160 case 1:
2161 bfd_elf_add_obj_attr_int (stdoutput, vendor, tag, i);
2162 break;
2163 default:
2164 abort ();
2165 }
2166
104d59d1 2167 demand_empty_rest_of_line ();
ee3c0378 2168 return tag;
104d59d1
JM		 2169bad_string:
2170 as_bad (_("bad string constant"));
2171 ignore_rest_of_line ();
ee3c0378 2172 return 0;
104d59d1
JM		 2173bad:
2174 as_bad (_("expected <tag> , <value>"));
2175 ignore_rest_of_line ();
ee3c0378 2176 return 0;
104d59d1
JM		 2177}
2178
2179/* Parse a .gnu_attribute directive. */
2180
2181static void
2182s_gnu_attribute (int ignored ATTRIBUTE_UNUSED)
2183{
2184 s_vendor_attribute (OBJ_ATTR_GNU);
2185}
2186#endif /* OBJ_ELF */
2187
252b5132
RH		 2188/* Handle the MRI IRP and IRPC pseudo-ops. */
2189
2190void
39e6acbd 2191s_irp (int irpc)
252b5132 2192{
40a4d956 2193 char *file, *eol;
252b5132
RH		 2194 unsigned int line;
2195 sb s;
2196 const char *err;
2197 sb out;
2198
2199 as_where (&file, &line);
2200
2201 sb_new (&s);
40a4d956
JB		 2202 eol = find_end_of_line (input_line_pointer, 0);
2203 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2204 input_line_pointer = eol;
252b5132
RH		 2205
2206 sb_new (&out);
2207
7592cfd7 2208 err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
252b5132
RH		 2209 if (err != NULL)
2210 as_bad_where (file, line, "%s", err);
2211
2212 sb_kill (&s);
2213
9f10757c 2214 input_scrub_include_sb (&out, input_line_pointer, 1);
252b5132
RH		 2215 sb_kill (&out);
2216 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2217}
2218
2219/* Handle the .linkonce pseudo-op. This tells the assembler to mark
2220 the section to only be linked once. However, this is not supported
2221 by most object file formats. This takes an optional argument,
2222 which is what to do about duplicates. */
2223
2224void
39e6acbd 2225s_linkonce (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2226{
2227 enum linkonce_type type;
2228
2229 SKIP_WHITESPACE ();
2230
2231 type = LINKONCE_DISCARD;
2232
041ff4dd 2233 if (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 2234 {
2235 char *s;
2236 char c;
2237
2238 s = input_line_pointer;
2239 c = get_symbol_end ();
2240 if (strcasecmp (s, "discard") == 0)
2241 type = LINKONCE_DISCARD;
2242 else if (strcasecmp (s, "one_only") == 0)
2243 type = LINKONCE_ONE_ONLY;
2244 else if (strcasecmp (s, "same_size") == 0)
2245 type = LINKONCE_SAME_SIZE;
2246 else if (strcasecmp (s, "same_contents") == 0)
2247 type = LINKONCE_SAME_CONTENTS;
2248 else
2249 as_warn (_("unrecognized .linkonce type `%s'"), s);
2250
2251 *input_line_pointer = c;
2252 }
2253
2254#ifdef obj_handle_link_once
2255 obj_handle_link_once (type);
2256#else /* ! defined (obj_handle_link_once) */
252b5132
RH		 2257 {
2258 flagword flags;
2259
2260 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2261 as_warn (_(".linkonce is not supported for this object file format"));
2262
2263 flags = bfd_get_section_flags (stdoutput, now_seg);
2264 flags |= SEC_LINK_ONCE;
2265 switch (type)
2266 {
2267 default:
2268 abort ();
2269 case LINKONCE_DISCARD:
2270 flags |= SEC_LINK_DUPLICATES_DISCARD;
2271 break;
2272 case LINKONCE_ONE_ONLY:
2273 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2274 break;
2275 case LINKONCE_SAME_SIZE:
2276 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2277 break;
2278 case LINKONCE_SAME_CONTENTS:
2279 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2280 break;
2281 }
041ff4dd 2282 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
252b5132
RH		 2283 as_bad (_("bfd_set_section_flags: %s"),
2284 bfd_errmsg (bfd_get_error ()));
2285 }
252b5132
RH		 2286#endif /* ! defined (obj_handle_link_once) */
2287
2288 demand_empty_rest_of_line ();
2289}
2290
e13bab5a
AM		 2291void
2292bss_alloc (symbolS *symbolP, addressT size, int align)
252b5132 2293{
e13bab5a 2294 char *pfrag;
252b5132
RH		 2295 segT current_seg = now_seg;
2296 subsegT current_subseg = now_subseg;
252b5132
RH		 2297 segT bss_seg = bss_section;
2298
252b5132
RH		 2299#if defined (TC_MIPS) || defined (TC_ALPHA)
2300 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2301 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2302 {
2303 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
e13bab5a 2304 if (size <= bfd_get_gp_size (stdoutput))
252b5132
RH		 2305 {
2306 bss_seg = subseg_new (".sbss", 1);
2307 seg_info (bss_seg)->bss = 1;
041ff4dd 2308 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
252b5132
RH		 2309 as_warn (_("error setting flags for \".sbss\": %s"),
2310 bfd_errmsg (bfd_get_error ()));
252b5132
RH		 2311 }
2312 }
2313#endif
e13bab5a 2314 subseg_set (bss_seg, 1);
8684e216 2315
e13bab5a 2316 if (align)
041ff4dd 2317 {
e13bab5a
AM		 2318 record_alignment (bss_seg, align);
2319 frag_align (align, 0, 0);
041ff4dd 2320 }
252b5132 2321
e13bab5a
AM		 2322 /* Detach from old frag. */
2323 if (S_GET_SEGMENT (symbolP) == bss_seg)
2324 symbol_get_frag (symbolP)->fr_symbol = NULL;
f0e652b4 2325
e13bab5a
AM		 2326 symbol_set_frag (symbolP, frag_now);
2327 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2328 *pfrag = 0;
f0e652b4 2329
e13bab5a
AM		 2330#ifdef S_SET_SIZE
2331 S_SET_SIZE (symbolP, size);
2332#endif
2333 S_SET_SEGMENT (symbolP, bss_seg);
f0e652b4 2334
e13bab5a
AM		 2335#ifdef OBJ_COFF
2336 /* The symbol may already have been created with a preceding
2337 ".globl" directive -- be careful not to step on storage class
2338 in that case. Otherwise, set it to static. */
2339 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2340 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2341#endif /* OBJ_COFF */
f0e652b4 2342
e13bab5a
AM		 2343 subseg_set (current_seg, current_subseg);
2344}
f0e652b4 2345
e13bab5a
AM		 2346offsetT
2347parse_align (int align_bytes)
2348{
2349 expressionS exp;
2350 addressT align;
252b5132 2351
e13bab5a
AM		 2352 SKIP_WHITESPACE ();
2353 if (*input_line_pointer != ',')
2354 {
2355 no_align:
2356 as_bad (_("expected alignment after size"));
2357 ignore_rest_of_line ();
2358 return -1;
2359 }
f0e652b4 2360
e13bab5a
AM		 2361 input_line_pointer++;
2362 SKIP_WHITESPACE ();
f0e652b4 2363
e13bab5a
AM		 2364 align = get_absolute_expr (&exp);
2365 if (exp.X_op == O_absent)
2366 goto no_align;
2367
2368 if (!exp.X_unsigned)
2369 {
2370 as_warn (_("alignment negative; 0 assumed"));
2371 align = 0;
041ff4dd 2372 }
e13bab5a
AM		 2373
2374 if (align_bytes && align != 0)
252b5132 2375 {
e13bab5a
AM		 2376 /* convert to a power of 2 alignment */
2377 unsigned int alignp2 = 0;
2378 while ((align & 1) == 0)
2379 align >>= 1, ++alignp2;
2380 if (align != 1)
252b5132 2381 {
e13bab5a
AM		 2382 as_bad (_("alignment not a power of 2"));
2383 ignore_rest_of_line ();
2384 return -1;
252b5132 2385 }
e13bab5a 2386 align = alignp2;
252b5132 2387 }
e13bab5a
AM		 2388 return align;
2389}
252b5132 2390
e13bab5a
AM		 2391/* Called from s_comm_internal after symbol name and size have been
2392 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2393 1 if this was a ".bss" directive which has a 3rd argument
2394 (alignment as a power of 2), or 2 if this was a ".bss" directive
2395 with alignment in bytes. */
252b5132 2396
13c56984 2397symbolS *
e13bab5a
AM		 2398s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2399{
2400 addressT align = 0;
252b5132 2401
e13bab5a
AM		 2402 if (needs_align)
2403 {
2404 align = parse_align (needs_align - 1);
2405 if (align == (addressT) -1)
2406 return NULL;
252b5132
RH		 2407 }
2408 else
e13bab5a
AM		 2409 /* Assume some objects may require alignment on some systems. */
2410 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
252b5132 2411
e13bab5a
AM		 2412 bss_alloc (symbolP, size, align);
2413 return symbolP;
041ff4dd 2414}
252b5132
RH		 2415
2416void
39e6acbd 2417s_lcomm (int needs_align)
252b5132 2418{
e13bab5a 2419 s_comm_internal (needs_align, s_lcomm_internal);
252b5132
RH		 2420}
2421
041ff4dd 2422void
39e6acbd 2423s_lcomm_bytes (int needs_align)
252b5132 2424{
e13bab5a 2425 s_comm_internal (needs_align * 2, s_lcomm_internal);
252b5132
RH		 2426}
2427
041ff4dd 2428void
39e6acbd 2429s_lsym (int ignore ATTRIBUTE_UNUSED)
252b5132 2430{
3d540e93
NC		 2431 char *name;
2432 char c;
2433 char *p;
252b5132 2434 expressionS exp;
3d540e93 2435 symbolS *symbolP;
252b5132 2436
041ff4dd 2437 /* We permit ANY defined expression: BSD4.2 demands constants. */
252b5132
RH		 2438 name = input_line_pointer;
2439 c = get_symbol_end ();
2440 p = input_line_pointer;
2441 *p = c;
0e389e77
AM		 2442
2443 if (name == p)
2444 {
2445 as_bad (_("expected symbol name"));
40a4d956 2446 ignore_rest_of_line ();
0e389e77
AM		 2447 return;
2448 }
2449
252b5132 2450 SKIP_WHITESPACE ();
f0e652b4 2451
252b5132
RH		 2452 if (*input_line_pointer != ',')
2453 {
2454 *p = 0;
0e389e77 2455 as_bad (_("expected comma after \"%s\""), name);
252b5132
RH		 2456 *p = c;
2457 ignore_rest_of_line ();
2458 return;
2459 }
f0e652b4 2460
252b5132 2461 input_line_pointer++;
9497f5ac 2462 expression_and_evaluate (&exp);
f0e652b4 2463
252b5132
RH		 2464 if (exp.X_op != O_constant
2465 && exp.X_op != O_register)
2466 {
2467 as_bad (_("bad expression"));
2468 ignore_rest_of_line ();
2469 return;
2470 }
f0e652b4 2471
252b5132
RH		 2472 *p = 0;
2473 symbolP = symbol_find_or_make (name);
2474
86ebace2 2475 if (S_GET_SEGMENT (symbolP) == undefined_section)
252b5132
RH		 2476 {
2477 /* The name might be an undefined .global symbol; be sure to
041ff4dd 2478 keep the "external" bit. */
252b5132
RH		 2479 S_SET_SEGMENT (symbolP,
2480 (exp.X_op == O_constant
2481 ? absolute_section
2482 : reg_section));
2483 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2484 }
2485 else
2486 {
0e389e77 2487 as_bad (_("symbol `%s' is already defined"), name);
252b5132 2488 }
f0e652b4 2489
252b5132
RH		 2490 *p = c;
2491 demand_empty_rest_of_line ();
041ff4dd 2492}
252b5132 2493
0822d075
NC		 2494/* Read a line into an sb. Returns the character that ended the line
2495 or zero if there are no more lines. */
252b5132
RH		 2496
2497static int
7592cfd7 2498get_line_sb (sb *line, int in_macro)
252b5132 2499{
40a4d956 2500 char *eol;
252b5132
RH		 2501
2502 if (input_line_pointer[-1] == '\n')
2503 bump_line_counters ();
2504
2505 if (input_line_pointer >= buffer_limit)
2506 {
2507 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2508 if (buffer_limit == 0)
2509 return 0;
2510 }
2511
7592cfd7 2512 eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
40a4d956
JB		 2513 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2514 input_line_pointer = eol;
f0e652b4 2515
0822d075
NC		 2516 /* Don't skip multiple end-of-line characters, because that breaks support
2517 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2518 characters but isn't. Instead just skip one end of line character and
2519 return the character skipped so that the caller can re-insert it if
2520 necessary. */
40a4d956 2521 return *input_line_pointer++;
252b5132
RH		 2522}
2523
7592cfd7
NC		 2524static int
2525get_non_macro_line_sb (sb *line)
2526{
2527 return get_line_sb (line, 0);
2528}
2529
2530static int
2531get_macro_line_sb (sb *line)
2532{
2533 return get_line_sb (line, 1);
2534}
2535
fea17916 2536/* Define a macro. This is an interface to macro.c. */
252b5132
RH		 2537
2538void
39e6acbd 2539s_macro (int ignore ATTRIBUTE_UNUSED)
252b5132 2540{
40a4d956 2541 char *file, *eol;
252b5132
RH		 2542 unsigned int line;
2543 sb s;
252b5132
RH		 2544 const char *err;
2545 const char *name;
2546
2547 as_where (&file, &line);
2548
2549 sb_new (&s);
40a4d956
JB		 2550 eol = find_end_of_line (input_line_pointer, 0);
2551 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2552 input_line_pointer = eol;
252b5132 2553
252b5132 2554 if (line_label != NULL)
360e86f1
JB		 2555 {
2556 sb label;
252b5132 2557
360e86f1
JB		 2558 sb_new (&label);
2559 sb_add_string (&label, S_GET_NAME (line_label));
7592cfd7 2560 err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
360e86f1
JB		 2561 sb_kill (&label);
2562 }
2563 else
7592cfd7 2564 err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
252b5132 2565 if (err != NULL)
02ddf156 2566 as_bad_where (file, line, err, name);
252b5132
RH		 2567 else
2568 {
2569 if (line_label != NULL)
2570 {
5e75c3ab 2571 S_SET_SEGMENT (line_label, absolute_section);
252b5132 2572 S_SET_VALUE (line_label, 0);
2b47531b 2573 symbol_set_frag (line_label, &zero_address_frag);
252b5132
RH		 2574 }
2575
abd63a32 2576 if (((NO_PSEUDO_DOT || flag_m68k_mri)
252b5132 2577 && hash_find (po_hash, name) != NULL)
041ff4dd 2578 || (!flag_m68k_mri
252b5132
RH		 2579 && *name == '.'
2580 && hash_find (po_hash, name + 1) != NULL))
02ddf156
JB		 2581 as_warn_where (file,
2582 line,
2583 _("attempt to redefine pseudo-op `%s' ignored"),
252b5132
RH		 2584 name);
2585 }
2586
2587 sb_kill (&s);
2588}
2589
2590/* Handle the .mexit pseudo-op, which immediately exits a macro
2591 expansion. */
2592
2593void
39e6acbd 2594s_mexit (int ignore ATTRIBUTE_UNUSED)
252b5132 2595{
5808f4a6
NC		 2596 if (macro_nest)
2597 {
2598 cond_exit_macro (macro_nest);
2599 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2600 }
2601 else
2602 as_warn (_("ignoring macro exit outside a macro definition."));
252b5132
RH		 2603}
2604
2605/* Switch in and out of MRI mode. */
2606
2607void
39e6acbd 2608s_mri (int ignore ATTRIBUTE_UNUSED)
252b5132 2609{
3d540e93
NC		 2610 int on;
2611#ifdef MRI_MODE_CHANGE
2612 int old_flag;
2613#endif
252b5132
RH		 2614
2615 on = get_absolute_expression ();
3d540e93 2616#ifdef MRI_MODE_CHANGE
252b5132 2617 old_flag = flag_mri;
3d540e93 2618#endif
252b5132
RH		 2619 if (on != 0)
2620 {
2621 flag_mri = 1;
2622#ifdef TC_M68K
2623 flag_m68k_mri = 1;
2624#endif
2625 macro_mri_mode (1);
2626 }
2627 else
2628 {
2629 flag_mri = 0;
abd63a32 2630#ifdef TC_M68K
252b5132 2631 flag_m68k_mri = 0;
abd63a32 2632#endif
252b5132
RH		 2633 macro_mri_mode (0);
2634 }
2635
2636 /* Operator precedence changes in m68k MRI mode, so we need to
2637 update the operator rankings. */
2638 expr_set_precedence ();
2639
2640#ifdef MRI_MODE_CHANGE
2641 if (on != old_flag)
2642 MRI_MODE_CHANGE (on);
2643#endif
2644
2645 demand_empty_rest_of_line ();
2646}
2647
2648/* Handle changing the location counter. */
2649
2650static void
39e6acbd 2651do_org (segT segment, expressionS *exp, int fill)
252b5132
RH		 2652{
2653 if (segment != now_seg && segment != absolute_section)
0e389e77 2654 as_bad (_("invalid segment \"%s\""), segment_name (segment));
252b5132
RH		 2655
2656 if (now_seg == absolute_section)
2657 {
2658 if (fill != 0)
2659 as_warn (_("ignoring fill value in absolute section"));
2660 if (exp->X_op != O_constant)
2661 {
2662 as_bad (_("only constant offsets supported in absolute section"));
2663 exp->X_add_number = 0;
2664 }
2665 abs_section_offset = exp->X_add_number;
2666 }
2667 else
2668 {
2669 char *p;
2289f85d
AM		 2670 symbolS *sym = exp->X_add_symbol;
2671 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
252b5132 2672
2289f85d
AM		 2673 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2674 {
2675 /* Handle complex expressions. */
2676 sym = make_expr_symbol (exp);
2677 off = 0;
2678 }
2679
2680 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
252b5132
RH		 2681 *p = fill;
2682 }
2683}
2684
041ff4dd 2685void
39e6acbd 2686s_org (int ignore ATTRIBUTE_UNUSED)
252b5132 2687{
3d540e93 2688 segT segment;
252b5132 2689 expressionS exp;
3d540e93 2690 long temp_fill;
252b5132
RH		 2691
2692#ifdef md_flush_pending_output
2693 md_flush_pending_output ();
2694#endif
2695
2696 /* The m68k MRI assembler has a different meaning for .org. It
2697 means to create an absolute section at a given address. We can't
2698 support that--use a linker script instead. */
2699 if (flag_m68k_mri)
2700 {
2701 as_bad (_("MRI style ORG pseudo-op not supported"));
2702 ignore_rest_of_line ();
2703 return;
2704 }
2705
2706 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2707 thing as a sub-segment-relative origin. Any absolute origin is
2708 given a warning, then assumed to be segment-relative. Any
2709 segmented origin expression ("foo+42") had better be in the right
2710 segment or the .org is ignored.
2711
2712 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2713 we never know sub-segment sizes when we are reading code. BSD
2714 will crash trying to emit negative numbers of filler bytes in
2715 certain .orgs. We don't crash, but see as-write for that code.
2716
2717 Don't make frag if need_pass_2==1. */
2718 segment = get_known_segmented_expression (&exp);
2719 if (*input_line_pointer == ',')
2720 {
2721 input_line_pointer++;
2722 temp_fill = get_absolute_expression ();
2723 }
2724 else
2725 temp_fill = 0;
2726
2727 if (!need_pass_2)
2728 do_org (segment, &exp, temp_fill);
2729
2730 demand_empty_rest_of_line ();
041ff4dd 2731}
252b5132
RH		 2732
2733/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2734 called by the obj-format routine which handles section changing
2735 when in MRI mode. It will create a new section, and return it. It
2736 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
7be1c489 2737 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
252b5132
RH		 2738
2739void
39e6acbd 2740s_mri_sect (char *type ATTRIBUTE_UNUSED)
252b5132
RH		 2741{
2742#ifdef TC_M68K
2743
2744 char *name;
2745 char c;
2746 segT seg;
2747
2748 SKIP_WHITESPACE ();
041ff4dd 2749
252b5132 2750 name = input_line_pointer;
3882b010 2751 if (!ISDIGIT (*name))
252b5132
RH		 2752 c = get_symbol_end ();
2753 else
2754 {
2755 do
2756 {
2757 ++input_line_pointer;
2758 }
3882b010 2759 while (ISDIGIT (*input_line_pointer));
f0e652b4 2760
252b5132
RH		 2761 c = *input_line_pointer;
2762 *input_line_pointer = '\0';
2763 }
2764
2765 name = xstrdup (name);
2766
2767 *input_line_pointer = c;
2768
2769 seg = subseg_new (name, 0);
2770
2771 if (*input_line_pointer == ',')
2772 {
2773 int align;
2774
2775 ++input_line_pointer;
2776 align = get_absolute_expression ();
2777 record_alignment (seg, align);
2778 }
2779
2780 *type = 'C';
2781 if (*input_line_pointer == ',')
2782 {
2783 c = *++input_line_pointer;
3882b010 2784 c = TOUPPER (c);
252b5132
RH		 2785 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2786 *type = c;
2787 else
2788 as_bad (_("unrecognized section type"));
2789 ++input_line_pointer;
2790
252b5132
RH		 2791 {
2792 flagword flags;
2793
2794 flags = SEC_NO_FLAGS;
2795 if (*type == 'C')
2796 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2797 else if (*type == 'D' || *type == 'M')
2798 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2799 else if (*type == 'R')
2800 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2801 if (flags != SEC_NO_FLAGS)
2802 {
041ff4dd 2803 if (!bfd_set_section_flags (stdoutput, seg, flags))
252b5132
RH		 2804 as_warn (_("error setting flags for \"%s\": %s"),
2805 bfd_section_name (stdoutput, seg),
2806 bfd_errmsg (bfd_get_error ()));
2807 }
2808 }
252b5132
RH		 2809 }
2810
2811 /* Ignore the HP type. */
2812 if (*input_line_pointer == ',')
2813 input_line_pointer += 2;
2814
2815 demand_empty_rest_of_line ();
2816
2817#else /* ! TC_M68K */
2818#ifdef TC_I960
2819
2820 char *name;
2821 char c;
2822 segT seg;
2823
2824 SKIP_WHITESPACE ();
2825
2826 name = input_line_pointer;
2827 c = get_symbol_end ();
2828
2829 name = xstrdup (name);
2830
2831 *input_line_pointer = c;
2832
2833 seg = subseg_new (name, 0);
2834
2835 if (*input_line_pointer != ',')
2836 *type = 'C';
2837 else
2838 {
2839 char *sectype;
2840
2841 ++input_line_pointer;
2842 SKIP_WHITESPACE ();
2843 sectype = input_line_pointer;
2844 c = get_symbol_end ();
2845 if (*sectype == '\0')
2846 *type = 'C';
2847 else if (strcasecmp (sectype, "text") == 0)
2848 *type = 'C';
2849 else if (strcasecmp (sectype, "data") == 0)
2850 *type = 'D';
2851 else if (strcasecmp (sectype, "romdata") == 0)
2852 *type = 'R';
2853 else
2854 as_warn (_("unrecognized section type `%s'"), sectype);
2855 *input_line_pointer = c;
2856 }
2857
2858 if (*input_line_pointer == ',')
2859 {
2860 char *seccmd;
2861
2862 ++input_line_pointer;
2863 SKIP_WHITESPACE ();
2864 seccmd = input_line_pointer;
2865 c = get_symbol_end ();
2866 if (strcasecmp (seccmd, "absolute") == 0)
2867 {
2868 as_bad (_("absolute sections are not supported"));
2869 *input_line_pointer = c;
2870 ignore_rest_of_line ();
2871 return;
2872 }
2873 else if (strcasecmp (seccmd, "align") == 0)
2874 {
2875 int align;
2876
2877 *input_line_pointer = c;
2878 align = get_absolute_expression ();
2879 record_alignment (seg, align);
2880 }
2881 else
2882 {
2883 as_warn (_("unrecognized section command `%s'"), seccmd);
2884 *input_line_pointer = c;
2885 }
2886 }
2887
041ff4dd 2888 demand_empty_rest_of_line ();
252b5132
RH		 2889
2890#else /* ! TC_I960 */
2891 /* The MRI assembler seems to use different forms of .sect for
2892 different targets. */
2893 as_bad ("MRI mode not supported for this target");
2894 ignore_rest_of_line ();
2895#endif /* ! TC_I960 */
2896#endif /* ! TC_M68K */
2897}
2898
2899/* Handle the .print pseudo-op. */
2900
2901void
39e6acbd 2902s_print (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2903{
2904 char *s;
2905 int len;
2906
2907 s = demand_copy_C_string (&len);
d6415f6c
AM		 2908 if (s != NULL)
2909 printf ("%s\n", s);
252b5132
RH		 2910 demand_empty_rest_of_line ();
2911}
2912
2913/* Handle the .purgem pseudo-op. */
2914
2915void
39e6acbd 2916s_purgem (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2917{
2918 if (is_it_end_of_statement ())
2919 {
2920 demand_empty_rest_of_line ();
2921 return;
2922 }
2923
2924 do
2925 {
2926 char *name;
2927 char c;
2928
2929 SKIP_WHITESPACE ();
2930 name = input_line_pointer;
2931 c = get_symbol_end ();
2932 delete_macro (name);
2933 *input_line_pointer = c;
2934 SKIP_WHITESPACE ();
2935 }
2936 while (*input_line_pointer++ == ',');
2937
2938 --input_line_pointer;
2939 demand_empty_rest_of_line ();
2940}
2941
057f53c1 2942/* Handle the .endm/.endr pseudo-ops. */
252b5132 2943
057f53c1
JB		 2944static void
2945s_bad_end (int endr)
7f28ab9d 2946{
057f53c1
JB		 2947 as_warn (_(".end%c encountered without preceeding %s"),
2948 endr ? 'r' : 'm',
2949 endr ? ".rept, .irp, or .irpc" : ".macro");
7f28ab9d
NC		 2950 demand_empty_rest_of_line ();
2951}
2952
2953/* Handle the .rept pseudo-op. */
2954
252b5132 2955void
39e6acbd 2956s_rept (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2957{
2958 int count;
252b5132
RH		 2959
2960 count = get_absolute_expression ();
2961
041ff4dd 2962 do_repeat (count, "REPT", "ENDR");
6dc19fc4
TW		 2963}
2964
2965/* This function provides a generic repeat block implementation. It allows
041ff4dd 2966 different directives to be used as the start/end keys. */
6dc19fc4
TW		 2967
2968void
39e6acbd 2969do_repeat (int count, const char *start, const char *end)
6dc19fc4
TW		 2970{
2971 sb one;
2972 sb many;
2973
252b5132 2974 sb_new (&one);
7592cfd7 2975 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
252b5132 2976 {
6dc19fc4 2977 as_bad (_("%s without %s"), start, end);
252b5132
RH		 2978 return;
2979 }
2980
2981 sb_new (&many);
2982 while (count-- > 0)
2983 sb_add_sb (&many, &one);
2984
2985 sb_kill (&one);
2986
9f10757c 2987 input_scrub_include_sb (&many, input_line_pointer, 1);
252b5132
RH		 2988 sb_kill (&many);
2989 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2990}
2991
c7927a3c
NC		 2992/* Like do_repeat except that any text matching EXPANDER in the
2993 block is replaced by the itteration count. */
2994
2995void
2996do_repeat_with_expander (int count,
2997 const char * start,
2998 const char * end,
2999 const char * expander)
3000{
3001 sb one;
3002 sb many;
3003
3004 sb_new (&one);
3005 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3006 {
3007 as_bad (_("%s without %s"), start, end);
3008 return;
3009 }
3010
3011 sb_new (&many);
3012
3013 if (expander != NULL && strstr (one.ptr, expander) != NULL)
3014 {
3015 while (count -- > 0)
3016 {
3017 int len;
3018 char * sub;
3019 sb processed;
3020
3021 sb_new (& processed);
3022 sb_add_sb (& processed, & one);
3023 sub = strstr (processed.ptr, expander);
3024 len = sprintf (sub, "%d", count);
3025 gas_assert (len < 8);
3026 strcpy (sub + len, sub + 8);
3027 processed.len -= (8 - len);
3028 sb_add_sb (& many, & processed);
3029 sb_kill (& processed);
3030 }
3031 }
3032 else
3033 while (count-- > 0)
3034 sb_add_sb (&many, &one);
3035
3036 sb_kill (&one);
3037
3038 input_scrub_include_sb (&many, input_line_pointer, 1);
3039 sb_kill (&many);
3040 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3041}
3042
6dc19fc4
TW		 3043/* Skip to end of current repeat loop; EXTRA indicates how many additional
3044 input buffers to skip. Assumes that conditionals preceding the loop end
041ff4dd 3045 are properly nested.
6dc19fc4
TW		 3046
3047 This function makes it easier to implement a premature "break" out of the
3048 loop. The EXTRA arg accounts for other buffers we might have inserted,
041ff4dd 3049 such as line substitutions. */
6dc19fc4
TW		 3050
3051void
39e6acbd 3052end_repeat (int extra)
6dc19fc4
TW		 3053{
3054 cond_exit_macro (macro_nest);
3055 while (extra-- >= 0)
3056 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3057}
3058
be95a9c1 3059static void
9497f5ac 3060assign_symbol (char *name, int mode)
be95a9c1
AM		 3061{
3062 symbolS *symbolP;
3063
3064 if (name[0] == '.' && name[1] == '\0')
3065 {
3066 /* Turn '. = mumble' into a .org mumble. */
3067 segT segment;
3068 expressionS exp;
3069
3070 segment = get_known_segmented_expression (&exp);
3071
3072 if (!need_pass_2)
3073 do_org (segment, &exp, 0);
3074
3075 return;
3076 }
3077
3078 if ((symbolP = symbol_find (name)) == NULL
3079 && (symbolP = md_undefined_symbol (name)) == NULL)
3080 {
3081 symbolP = symbol_find_or_make (name);
3082#ifndef NO_LISTING
3083 /* When doing symbol listings, play games with dummy fragments living
3084 outside the normal fragment chain to record the file and line info
3085 for this symbol. */
3086 if (listing & LISTING_SYMBOLS)
3087 {
3088 extern struct list_info_struct *listing_tail;
31d20a21 3089 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
be95a9c1
AM		 3090 dummy_frag->line = listing_tail;
3091 dummy_frag->fr_symbol = symbolP;
3092 symbol_set_frag (symbolP, dummy_frag);
3093 }
3094#endif
31d20a21
AM		 3095#ifdef OBJ_COFF
3096 /* "set" symbols are local unless otherwise specified. */
3097 SF_SET_LOCAL (symbolP);
be95a9c1
AM		 3098#endif
3099 }
3100
6a2b6326 3101 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
9497f5ac
NC		 3102 {
3103 /* Permit register names to be redefined. */
3104 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3105 && S_GET_SEGMENT (symbolP) != reg_section)
3106 {
3107 as_bad (_("symbol `%s' is already defined"), name);
3108 symbolP = symbol_clone (symbolP, 0);
3109 }
3110 /* If the symbol is volatile, copy the symbol and replace the
3111 original with the copy, so that previous uses of the symbol will
3112 retain the value of the symbol at the point of use. */
89cdfe57 3113 else if (S_IS_VOLATILE (symbolP))
9497f5ac
NC		 3114 symbolP = symbol_clone (symbolP, 1);
3115 }
3116
3117 if (mode == 0)
3118 S_SET_VOLATILE (symbolP);
3119 else if (mode < 0)
3120 S_SET_FORWARD_REF (symbolP);
be95a9c1
AM		 3121
3122 pseudo_set (symbolP);
be95a9c1
AM		 3123}
3124
9497f5ac
NC		 3125/* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3126 then this is .equiv, and it is an error if the symbol is already
3127 defined. If EQUIV is -1, the symbol additionally is a forward
3128 reference. */
252b5132 3129
041ff4dd 3130void
39e6acbd 3131s_set (int equiv)
252b5132 3132{
be95a9c1
AM		 3133 char *name;
3134 char delim;
3135 char *end_name;
252b5132 3136
041ff4dd
NC		 3137 /* Especial apologies for the random logic:
3138 this just grew, and could be parsed much more simply!
3139 Dean in haste. */
252b5132
RH		 3140 name = input_line_pointer;
3141 delim = get_symbol_end ();
3142 end_name = input_line_pointer;
0e389e77 3143 *end_name = delim;
409d19c4 3144
0e389e77 3145 if (name == end_name)
409d19c4
AM		 3146 {
3147 as_bad (_("expected symbol name"));
40a4d956 3148 ignore_rest_of_line ();
409d19c4
AM		 3149 return;
3150 }
3151
252b5132
RH		 3152 SKIP_WHITESPACE ();
3153
3154 if (*input_line_pointer != ',')
3155 {
3156 *end_name = 0;
0e389e77 3157 as_bad (_("expected comma after \"%s\""), name);
252b5132
RH		 3158 *end_name = delim;
3159 ignore_rest_of_line ();
3160 return;
3161 }
3162
3163 input_line_pointer++;
3164 *end_name = 0;
3165
be95a9c1 3166 assign_symbol (name, equiv);
252b5132 3167 *end_name = delim;
31d20a21
AM		 3168
3169 demand_empty_rest_of_line ();
041ff4dd 3170}
252b5132 3171
041ff4dd 3172void
39e6acbd 3173s_space (int mult)
252b5132
RH		 3174{
3175 expressionS exp;
3176 expressionS val;
3177 char *p = 0;
3178 char *stop = NULL;
fb25138b 3179 char stopc = 0;
252b5132
RH		 3180 int bytes;
3181
3182#ifdef md_flush_pending_output
3183 md_flush_pending_output ();
3184#endif
3185
cc3f603a
JM		 3186#ifdef md_cons_align
3187 md_cons_align (1);
3188#endif
3189
252b5132
RH		 3190 if (flag_mri)
3191 stop = mri_comment_field (&stopc);
3192
3193 /* In m68k MRI mode, we need to align to a word boundary, unless
3194 this is ds.b. */
3195 if (flag_m68k_mri && mult > 1)
3196 {
3197 if (now_seg == absolute_section)
3198 {
3199 abs_section_offset += abs_section_offset & 1;
3200 if (line_label != NULL)
3201 S_SET_VALUE (line_label, abs_section_offset);
3202 }
3203 else if (mri_common_symbol != NULL)
3204 {
91d6fa6a 3205 valueT mri_val;
252b5132 3206
91d6fa6a
NC		 3207 mri_val = S_GET_VALUE (mri_common_symbol);
3208 if ((mri_val & 1) != 0)
252b5132 3209 {
91d6fa6a 3210 S_SET_VALUE (mri_common_symbol, mri_val + 1);
252b5132
RH		 3211 if (line_label != NULL)
3212 {
2b47531b
ILT		 3213 expressionS *symexp;
3214
3215 symexp = symbol_get_value_expression (line_label);
3216 know (symexp->X_op == O_symbol);
3217 know (symexp->X_add_symbol == mri_common_symbol);
3218 symexp->X_add_number += 1;
252b5132
RH		 3219 }
3220 }
3221 }
3222 else
3223 {
3224 do_align (1, (char *) NULL, 0, 0);
3225 if (line_label != NULL)
3226 {
2b47531b 3227 symbol_set_frag (line_label, frag_now);
252b5132
RH		 3228 S_SET_VALUE (line_label, frag_now_fix ());
3229 }
3230 }
3231 }
3232
3233 bytes = mult;
3234
3235 expression (&exp);
3236
3237 SKIP_WHITESPACE ();
3238 if (*input_line_pointer == ',')
3239 {
3240 ++input_line_pointer;
3241 expression (&val);
3242 }
3243 else
3244 {
3245 val.X_op = O_constant;
3246 val.X_add_number = 0;
3247 }
3248
3249 if (val.X_op != O_constant
3250 || val.X_add_number < - 0x80
3251 || val.X_add_number > 0xff
3252 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3253 {
9497f5ac 3254 resolve_expression (&exp);
252b5132 3255 if (exp.X_op != O_constant)
0e389e77 3256 as_bad (_("unsupported variable size or fill value"));
252b5132
RH		 3257 else
3258 {
3259 offsetT i;
3260
3261 if (mult == 0)
3262 mult = 1;
3263 bytes = mult * exp.X_add_number;
3264 for (i = 0; i < exp.X_add_number; i++)
3265 emit_expr (&val, mult);
3266 }
3267 }
3268 else
3269 {
9497f5ac
NC		 3270 if (now_seg == absolute_section || mri_common_symbol != NULL)
3271 resolve_expression (&exp);
3272
252b5132
RH		 3273 if (exp.X_op == O_constant)
3274 {
a4a151e6 3275 offsetT repeat;
252b5132
RH		 3276
3277 repeat = exp.X_add_number;
3278 if (mult)
3279 repeat *= mult;
3280 bytes = repeat;
3281 if (repeat <= 0)
3282 {
2d150871
RO		 3283 if (!flag_mri)
3284 as_warn (_(".space repeat count is zero, ignored"));
3285 else if (repeat < 0)
252b5132
RH		 3286 as_warn (_(".space repeat count is negative, ignored"));
3287 goto getout;
3288 }
3289
3290 /* If we are in the absolute section, just bump the offset. */
3291 if (now_seg == absolute_section)
3292 {
3293 abs_section_offset += repeat;
3294 goto getout;
3295 }
3296
3297 /* If we are secretly in an MRI common section, then
3298 creating space just increases the size of the common
3299 symbol. */
3300 if (mri_common_symbol != NULL)
3301 {
3302 S_SET_VALUE (mri_common_symbol,
3303 S_GET_VALUE (mri_common_symbol) + repeat);
3304 goto getout;
3305 }
3306
3307 if (!need_pass_2)
3308 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3309 (offsetT) repeat, (char *) 0);
3310 }
3311 else
3312 {
3313 if (now_seg == absolute_section)
3314 {
3315 as_bad (_("space allocation too complex in absolute section"));
3316 subseg_set (text_section, 0);
3317 }
f0e652b4 3318
252b5132
RH		 3319 if (mri_common_symbol != NULL)
3320 {
3321 as_bad (_("space allocation too complex in common section"));
3322 mri_common_symbol = NULL;
3323 }
f0e652b4 3324
252b5132
RH		 3325 if (!need_pass_2)
3326 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3327 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3328 }
3329
3330 if (p)
3331 *p = val.X_add_number;
3332 }
3333
3334 getout:
3335
3336 /* In MRI mode, after an odd number of bytes, we must align to an
3337 even word boundary, unless the next instruction is a dc.b, ds.b
3338 or dcb.b. */
3339 if (flag_mri && (bytes & 1) != 0)
3340 mri_pending_align = 1;
3341
3342 demand_empty_rest_of_line ();
3343
3344 if (flag_mri)
3345 mri_comment_end (stop, stopc);
3346}
3347
3348/* This is like s_space, but the value is a floating point number with
3349 the given precision. This is for the MRI dcb.s pseudo-op and
3350 friends. */
3351
3352void
39e6acbd 3353s_float_space (int float_type)
252b5132
RH		 3354{
3355 offsetT count;
3356 int flen;
3357 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3358 char *stop = NULL;
fb25138b 3359 char stopc = 0;
252b5132 3360
cc3f603a
JM		 3361#ifdef md_cons_align
3362 md_cons_align (1);
3363#endif
3364
252b5132
RH		 3365 if (flag_mri)
3366 stop = mri_comment_field (&stopc);
3367
3368 count = get_absolute_expression ();
3369
3370 SKIP_WHITESPACE ();
3371 if (*input_line_pointer != ',')
3372 {
3373 as_bad (_("missing value"));
3374 ignore_rest_of_line ();
3375 if (flag_mri)
3376 mri_comment_end (stop, stopc);
3377 return;
3378 }
3379
3380 ++input_line_pointer;
3381
3382 SKIP_WHITESPACE ();
3383
3384 /* Skip any 0{letter} that may be present. Don't even check if the
3385 * letter is legal. */
3386 if (input_line_pointer[0] == '0'
3882b010 3387 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 3388 input_line_pointer += 2;
3389
3390 /* Accept :xxxx, where the x's are hex digits, for a floating point
3391 with the exact digits specified. */
3392 if (input_line_pointer[0] == ':')
3393 {
3394 flen = hex_float (float_type, temp);
3395 if (flen < 0)
3396 {
3397 ignore_rest_of_line ();
3398 if (flag_mri)
3399 mri_comment_end (stop, stopc);
3400 return;
3401 }
3402 }
3403 else
3404 {
3405 char *err;
3406
3407 err = md_atof (float_type, temp, &flen);
3408 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
499ac353 3409 know (err != NULL || flen > 0);
252b5132
RH		 3410 if (err)
3411 {
0e389e77 3412 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 3413 ignore_rest_of_line ();
3414 if (flag_mri)
3415 mri_comment_end (stop, stopc);
3416 return;
3417 }
3418 }
3419
3420 while (--count >= 0)
3421 {
3422 char *p;
3423
3424 p = frag_more (flen);
3425 memcpy (p, temp, (unsigned int) flen);
3426 }
3427
3428 demand_empty_rest_of_line ();
3429
3430 if (flag_mri)
3431 mri_comment_end (stop, stopc);
3432}
3433
3434/* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3435
3436void
39e6acbd 3437s_struct (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 3438{
3439 char *stop = NULL;
fb25138b 3440 char stopc = 0;
252b5132
RH		 3441
3442 if (flag_mri)
3443 stop = mri_comment_field (&stopc);
3444 abs_section_offset = get_absolute_expression ();
a2902af6
TS		 3445#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3446 /* The ELF backend needs to know that we are changing sections, so
3447 that .previous works correctly. */
f43abd2b 3448 if (IS_ELF)
a2902af6
TS		 3449 obj_elf_section_change_hook ();
3450#endif
252b5132
RH		 3451 subseg_set (absolute_section, 0);
3452 demand_empty_rest_of_line ();
3453 if (flag_mri)
3454 mri_comment_end (stop, stopc);
3455}
3456
3457void
39e6acbd 3458s_text (int ignore ATTRIBUTE_UNUSED)
252b5132 3459{
3d540e93 3460 int temp;
252b5132
RH		 3461
3462 temp = get_absolute_expression ();
3463 subseg_set (text_section, (subsegT) temp);
3464 demand_empty_rest_of_line ();
3465#ifdef OBJ_VMS
3466 const_flag &= ~IN_DEFAULT_SECTION;
3467#endif
041ff4dd 3468}
06e77878
AO		 3469
3470/* .weakref x, y sets x as an alias to y that, as long as y is not
3471 referenced directly, will cause y to become a weak symbol. */
3472void
3473s_weakref (int ignore ATTRIBUTE_UNUSED)
3474{
3475 char *name;
3476 char delim;
3477 char *end_name;
3478 symbolS *symbolP;
3479 symbolS *symbolP2;
3480 expressionS exp;
3481
3482 name = input_line_pointer;
3483 delim = get_symbol_end ();
3484 end_name = input_line_pointer;
3485
3486 if (name == end_name)
3487 {
3488 as_bad (_("expected symbol name"));
3489 *end_name = delim;
3490 ignore_rest_of_line ();
3491 return;
3492 }
3493
3494 symbolP = symbol_find_or_make (name);
3495
b54788f8
AO		 3496 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3497 {
89cdfe57 3498 if (!S_IS_VOLATILE (symbolP))
92757bc9
JB		 3499 {
3500 as_bad (_("symbol `%s' is already defined"), name);
3501 *end_name = delim;
3502 ignore_rest_of_line ();
3503 return;
3504 }
89cdfe57 3505 symbolP = symbol_clone (symbolP, 1);
92757bc9 3506 S_CLEAR_VOLATILE (symbolP);
b54788f8
AO		 3507 }
3508
06e77878
AO		 3509 *end_name = delim;
3510
3511 SKIP_WHITESPACE ();
3512
3513 if (*input_line_pointer != ',')
3514 {
3515 *end_name = 0;
3516 as_bad (_("expected comma after \"%s\""), name);
3517 *end_name = delim;
3518 ignore_rest_of_line ();
3519 return;
3520 }
3521
3522 input_line_pointer++;
3523
3524 SKIP_WHITESPACE ();
3525
3526 name = input_line_pointer;
3527 delim = get_symbol_end ();
3528 end_name = input_line_pointer;
3529
3530 if (name == end_name)
3531 {
3532 as_bad (_("expected symbol name"));
3533 ignore_rest_of_line ();
3534 return;
3535 }
3536
3537 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3538 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3539 {
3540 symbolP2 = symbol_find_or_make (name);
3541 S_SET_WEAKREFD (symbolP2);
3542 }
3543 else
3544 {
3545 symbolS *symp = symbolP2;
3546
3547 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3548 {
3549 expressionS *expP = symbol_get_value_expression (symp);
3550
9c2799c2 3551 gas_assert (expP->X_op == O_symbol
06e77878
AO		 3552 && expP->X_add_number == 0);
3553 symp = expP->X_add_symbol;
3554 }
3555 if (symp == symbolP)
3556 {
3557 char *loop;
3558
3559 loop = concat (S_GET_NAME (symbolP),
1bf57e9f 3560 " => ", S_GET_NAME (symbolP2), (const char *) NULL);
06e77878
AO		 3561
3562 symp = symbolP2;
3563 while (symp != symbolP)
3564 {
3565 char *old_loop = loop;
3566 symp = symbol_get_value_expression (symp)->X_add_symbol;
1bf57e9f
AM		 3567 loop = concat (loop, " => ", S_GET_NAME (symp),
3568 (const char *) NULL);
06e77878
AO		 3569 free (old_loop);
3570 }
3571
3572 as_bad (_("%s: would close weakref loop: %s"),
3573 S_GET_NAME (symbolP), loop);
3574
3575 free (loop);
3576
3577 *end_name = delim;
3578 ignore_rest_of_line ();
3579 return;
3580 }
3581
3582 /* Short-circuiting instead of just checking here might speed
3583 things up a tiny little bit, but loop error messages would
3584 miss intermediate links. */
3585 /* symbolP2 = symp; */
3586 }
3587
3588 *end_name = delim;
3589
3590 memset (&exp, 0, sizeof (exp));
3591 exp.X_op = O_symbol;
3592 exp.X_add_symbol = symbolP2;
3593
3594 S_SET_SEGMENT (symbolP, undefined_section);
3595 symbol_set_value_expression (symbolP, &exp);
3596 symbol_set_frag (symbolP, &zero_address_frag);
3597 S_SET_WEAKREFR (symbolP);
3598
3599 demand_empty_rest_of_line ();
3600}
252b5132 3601\f
c95b35a9
NS		 3602
3603/* Verify that we are at the end of a line. If not, issue an error and
3604 skip to EOL. */
3605
041ff4dd 3606void
39e6acbd 3607demand_empty_rest_of_line (void)
252b5132
RH		 3608{
3609 SKIP_WHITESPACE ();
3610 if (is_end_of_line[(unsigned char) *input_line_pointer])
041ff4dd 3611 input_line_pointer++;
252b5132 3612 else
252b5132 3613 {
3882b010 3614 if (ISPRINT (*input_line_pointer))
c95b35a9 3615 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
0e389e77 3616 *input_line_pointer);
252b5132 3617 else
c95b35a9 3618 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
0e389e77 3619 *input_line_pointer);
c95b35a9 3620 ignore_rest_of_line ();
252b5132 3621 }
c95b35a9
NS		 3622
3623 /* Return pointing just after end-of-line. */
3624 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3625}
3626
3627/* Silently advance to the end of line. Use this after already having
3628 issued an error about something bad. */
3629
3630void
3631ignore_rest_of_line (void)
3632{
3633 while (input_line_pointer < buffer_limit
3634 && !is_end_of_line[(unsigned char) *input_line_pointer])
3635 input_line_pointer++;
f0e652b4 3636
041ff4dd
NC		 3637 input_line_pointer++;
3638
3639 /* Return pointing just after end-of-line. */
252b5132
RH		 3640 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3641}
3642
be95a9c1
AM		 3643/* Sets frag for given symbol to zero_address_frag, except when the
3644 symbol frag is already set to a dummy listing frag. */
3645
3646static void
3647set_zero_frag (symbolS *symbolP)
3648{
3649 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3650 symbol_set_frag (symbolP, &zero_address_frag);
3651}
3652
041ff4dd 3653/* In: Pointer to a symbol.
d6415f6c 3654 Input_line_pointer->expression.
f0e652b4 3655
041ff4dd 3656 Out: Input_line_pointer->just after any whitespace after expression.
d6415f6c
AM		 3657 Tried to set symbol to value of expression.
3658 Will change symbols type, value, and frag; */
041ff4dd 3659
252b5132 3660void
39e6acbd 3661pseudo_set (symbolS *symbolP)
252b5132
RH		 3662{
3663 expressionS exp;
be95a9c1 3664 segT seg;
252b5132 3665
041ff4dd 3666 know (symbolP); /* NULL pointer is logic error. */
252b5132 3667
9497f5ac
NC		 3668 if (!S_IS_FORWARD_REF (symbolP))
3669 (void) expression (&exp);
3670 else
3671 (void) deferred_expression (&exp);
252b5132
RH		 3672
3673 if (exp.X_op == O_illegal)
0e389e77 3674 as_bad (_("illegal expression"));
252b5132 3675 else if (exp.X_op == O_absent)
0e389e77 3676 as_bad (_("missing expression"));
252b5132
RH		 3677 else if (exp.X_op == O_big)
3678 {
3679 if (exp.X_add_number > 0)
0e389e77 3680 as_bad (_("bignum invalid"));
252b5132 3681 else
0e389e77 3682 as_bad (_("floating point number invalid"));
252b5132
RH		 3683 }
3684 else if (exp.X_op == O_subtract
9497f5ac 3685 && !S_IS_FORWARD_REF (symbolP)
252b5132 3686 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2b47531b
ILT		 3687 && (symbol_get_frag (exp.X_add_symbol)
3688 == symbol_get_frag (exp.X_op_symbol)))
252b5132
RH		 3689 {
3690 exp.X_op = O_constant;
3691 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3692 - S_GET_VALUE (exp.X_op_symbol));
3693 }
3694
be95a9c1
AM		 3695 if (symbol_section_p (symbolP))
3696 {
3697 as_bad ("attempt to set value of section symbol");
3698 return;
3699 }
be95a9c1 3700
252b5132
RH		 3701 switch (exp.X_op)
3702 {
3703 case O_illegal:
3704 case O_absent:
3705 case O_big:
3706 exp.X_add_number = 0;
3707 /* Fall through. */
3708 case O_constant:
3709 S_SET_SEGMENT (symbolP, absolute_section);
252b5132 3710 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3711 set_zero_frag (symbolP);
252b5132
RH		 3712 break;
3713
3714 case O_register:
97c4f2d9 3715#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
d0548f34
L		 3716 if (S_IS_EXTERNAL (symbolP))
3717 {
3718 as_bad ("can't equate global symbol `%s' with register name",
3719 S_GET_NAME (symbolP));
3720 return;
3721 }
97c4f2d9 3722#endif
252b5132
RH		 3723 S_SET_SEGMENT (symbolP, reg_section);
3724 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3725 set_zero_frag (symbolP);
db557034 3726 symbol_get_value_expression (symbolP)->X_op = O_register;
252b5132
RH		 3727 break;
3728
3729 case O_symbol:
be95a9c1
AM		 3730 seg = S_GET_SEGMENT (exp.X_add_symbol);
3731 /* For x=undef+const, create an expression symbol.
3732 For x=x+const, just update x except when x is an undefined symbol
3733 For x=defined+const, evaluate x. */
3734 if (symbolP == exp.X_add_symbol
3735 && (seg != undefined_section
3736 || !symbol_constant_p (symbolP)))
3737 {
3738 *symbol_X_add_number (symbolP) += exp.X_add_number;
3739 break;
3740 }
9497f5ac 3741 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
252b5132
RH		 3742 {
3743 symbolS *s = exp.X_add_symbol;
3744
60938e80
L		 3745 if (S_IS_COMMON (s))
3746 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3747 S_GET_NAME (symbolP), S_GET_NAME (s));
3748
be95a9c1
AM		 3749 S_SET_SEGMENT (symbolP, seg);
3750 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
2b47531b 3751 symbol_set_frag (symbolP, symbol_get_frag (s));
252b5132 3752 copy_symbol_attributes (symbolP, s);
be95a9c1 3753 break;
252b5132 3754 }
66bd02d3
AM		 3755 S_SET_SEGMENT (symbolP, undefined_section);
3756 symbol_set_value_expression (symbolP, &exp);
f08e1e19 3757 copy_symbol_attributes (symbolP, exp.X_add_symbol);
66bd02d3
AM		 3758 set_zero_frag (symbolP);
3759 break;
252b5132
RH		 3760
3761 default:
aba4aa7d
AM		 3762 /* The value is some complex expression. */
3763 S_SET_SEGMENT (symbolP, expr_section);
2b47531b 3764 symbol_set_value_expression (symbolP, &exp);
be95a9c1 3765 set_zero_frag (symbolP);
252b5132
RH		 3766 break;
3767 }
3768}
3769\f
d6415f6c 3770/* cons()
f0e652b4 3771
041ff4dd
NC		 3772 CONStruct more frag of .bytes, or .words etc.
3773 Should need_pass_2 be 1 then emit no frag(s).
3774 This understands EXPRESSIONS.
f0e652b4 3775
041ff4dd 3776 Bug (?)
f0e652b4 3777
041ff4dd
NC		 3778 This has a split personality. We use expression() to read the
3779 value. We can detect if the value won't fit in a byte or word.
3780 But we can't detect if expression() discarded significant digits
3781 in the case of a long. Not worth the crocks required to fix it. */
252b5132
RH		 3782
3783/* Select a parser for cons expressions. */
3784
3785/* Some targets need to parse the expression in various fancy ways.
3786 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3787 (for example, the HPPA does this). Otherwise, you can define
3788 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3789 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3790 are defined, which is the normal case, then only simple expressions
3791 are permitted. */
3792
abd63a32 3793#ifdef TC_M68K
252b5132 3794static void
39e6acbd 3795parse_mri_cons (expressionS *exp, unsigned int nbytes);
abd63a32 3796#endif
252b5132
RH		 3797
3798#ifndef TC_PARSE_CONS_EXPRESSION
3799#ifdef BITFIELD_CONS_EXPRESSIONS
3800#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
041ff4dd 3801static void
39e6acbd 3802parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3803#endif
3804#ifdef REPEAT_CONS_EXPRESSIONS
3805#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3806static void
39e6acbd 3807parse_repeat_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3808#endif
3809
3810/* If we haven't gotten one yet, just call expression. */
3811#ifndef TC_PARSE_CONS_EXPRESSION
3812#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3813#endif
3814#endif
3815
cdfbf930 3816void
b41b1f95
L		 3817do_parse_cons_expression (expressionS *exp,
3818 int nbytes ATTRIBUTE_UNUSED)
cdfbf930
RH		 3819{
3820 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3821}
3822
3823
041ff4dd
NC		 3824/* Worker to do .byte etc statements.
3825 Clobbers input_line_pointer and checks end-of-line. */
3826
3827static void
3d540e93 3828cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */
39e6acbd 3829 int rva)
252b5132
RH		 3830{
3831 int c;
3832 expressionS exp;
3833 char *stop = NULL;
fb25138b 3834 char stopc = 0;
252b5132
RH		 3835
3836#ifdef md_flush_pending_output
3837 md_flush_pending_output ();
3838#endif
3839
3840 if (flag_mri)
3841 stop = mri_comment_field (&stopc);
3842
3843 if (is_it_end_of_statement ())
3844 {
3845 demand_empty_rest_of_line ();
3846 if (flag_mri)
3847 mri_comment_end (stop, stopc);
3848 return;
3849 }
3850
cc1bc22a
AM		 3851#ifdef TC_ADDRESS_BYTES
3852 if (nbytes == 0)
3853 nbytes = TC_ADDRESS_BYTES ();
3854#endif
3855
252b5132
RH		 3856#ifdef md_cons_align
3857 md_cons_align (nbytes);
3858#endif
3859
3860 c = 0;
3861 do
3862 {
abd63a32 3863#ifdef TC_M68K
252b5132
RH		 3864 if (flag_m68k_mri)
3865 parse_mri_cons (&exp, (unsigned int) nbytes);
3866 else
abd63a32 3867#endif
847d4311
NS		 3868 {
3869 if (*input_line_pointer == '"')
3870 {
3871 as_bad (_("unexpected `\"' in expression"));
3872 ignore_rest_of_line ();
3873 return;
3874 }
3875 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3876 }
252b5132
RH		 3877
3878 if (rva)
3879 {
3880 if (exp.X_op == O_symbol)
3881 exp.X_op = O_symbol_rva;
3882 else
3883 as_fatal (_("rva without symbol"));
3884 }
3885 emit_expr (&exp, (unsigned int) nbytes);
3886 ++c;
3887 }
3888 while (*input_line_pointer++ == ',');
3889
3890 /* In MRI mode, after an odd number of bytes, we must align to an
3891 even word boundary, unless the next instruction is a dc.b, ds.b
3892 or dcb.b. */
3893 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3894 mri_pending_align = 1;
3895
041ff4dd 3896 input_line_pointer--; /* Put terminator back into stream. */
252b5132
RH		 3897
3898 demand_empty_rest_of_line ();
3899
3900 if (flag_mri)
3901 mri_comment_end (stop, stopc);
3902}
3903
252b5132 3904void
39e6acbd 3905cons (int size)
252b5132
RH		 3906{
3907 cons_worker (size, 0);
3908}
3909
041ff4dd 3910void
39e6acbd 3911s_rva (int size)
252b5132
RH		 3912{
3913 cons_worker (size, 1);
3914}
3915
05e9452c
AM		 3916/* .reloc offset, reloc_name, symbol+addend. */
3917
3918void
3919s_reloc (int ignore ATTRIBUTE_UNUSED)
3920{
3921 char *stop = NULL;
3922 char stopc = 0;
3923 expressionS exp;
3924 char *r_name;
3925 int c;
3926 struct reloc_list *reloc;
3927
1e9cc1c2 3928 reloc = (struct reloc_list *) xmalloc (sizeof (*reloc));
05e9452c
AM		 3929
3930 if (flag_mri)
3931 stop = mri_comment_field (&stopc);
3932
3933 expression (&exp);
3934 switch (exp.X_op)
3935 {
3936 case O_illegal:
3937 case O_absent:
3938 case O_big:
3939 case O_register:
3940 as_bad (_("missing or bad offset expression"));
3941 goto err_out;
3942 case O_constant:
3943 exp.X_add_symbol = section_symbol (now_seg);
3944 exp.X_op = O_symbol;
3945 /* Fall thru */
3946 case O_symbol:
3947 if (exp.X_add_number == 0)
3948 {
3949 reloc->u.a.offset_sym = exp.X_add_symbol;
3950 break;
3951 }
3952 /* Fall thru */
3953 default:
3954 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3955 break;
3956 }
3957
3958 SKIP_WHITESPACE ();
3959 if (*input_line_pointer != ',')
3960 {
3961 as_bad (_("missing reloc type"));
3962 goto err_out;
3963 }
3964
3965 ++input_line_pointer;
3966 SKIP_WHITESPACE ();
3967 r_name = input_line_pointer;
3968 c = get_symbol_end ();
3969 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3970 *input_line_pointer = c;
3971 if (reloc->u.a.howto == NULL)
3972 {
3973 as_bad (_("unrecognized reloc type"));
3974 goto err_out;
3975 }
3976
3977 exp.X_op = O_absent;
3978 SKIP_WHITESPACE ();
3979 if (*input_line_pointer == ',')
3980 {
3981 ++input_line_pointer;
c188d0bb 3982 expression (&exp);
05e9452c
AM		 3983 }
3984 switch (exp.X_op)
3985 {
3986 case O_illegal:
3987 case O_big:
3988 case O_register:
3989 as_bad (_("bad reloc expression"));
3990 err_out:
3991 ignore_rest_of_line ();
3992 free (reloc);
3993 if (flag_mri)
3994 mri_comment_end (stop, stopc);
3995 return;
3996 case O_absent:
3997 reloc->u.a.sym = NULL;
3998 reloc->u.a.addend = 0;
3999 break;
4000 case O_constant:
4001 reloc->u.a.sym = NULL;
4002 reloc->u.a.addend = exp.X_add_number;
4003 break;
4004 case O_symbol:
4005 reloc->u.a.sym = exp.X_add_symbol;
4006 reloc->u.a.addend = exp.X_add_number;
4007 break;
4008 default:
4009 reloc->u.a.sym = make_expr_symbol (&exp);
4010 reloc->u.a.addend = 0;
4011 break;
4012 }
4013
4014 as_where (&reloc->file, &reloc->line);
4015 reloc->next = reloc_list;
4016 reloc_list = reloc;
4017
4018 demand_empty_rest_of_line ();
4019 if (flag_mri)
4020 mri_comment_end (stop, stopc);
4021}
4022
252b5132
RH		 4023/* Put the contents of expression EXP into the object file using
4024 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4025
4026void
39e6acbd 4027emit_expr (expressionS *exp, unsigned int nbytes)
252b5132
RH		 4028{
4029 operatorT op;
3d540e93 4030 char *p;
252b5132
RH		 4031 valueT extra_digit = 0;
4032
4033 /* Don't do anything if we are going to make another pass. */
4034 if (need_pass_2)
4035 return;
4036
4bc25101
NC		 4037 /* Grow the current frag now so that dot_value does not get invalidated
4038 if the frag were to fill up in the frag_more() call below. */
4039 frag_grow (nbytes);
ed7d5d1a
AM		 4040 dot_value = frag_now_fix ();
4041
252b5132
RH		 4042#ifndef NO_LISTING
4043#ifdef OBJ_ELF
4044 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4045 appear as a four byte positive constant in the .line section,
4046 followed by a 2 byte 0xffff. Look for that case here. */
4047 {
4048 static int dwarf_line = -1;
4049
4050 if (strcmp (segment_name (now_seg), ".line") != 0)
4051 dwarf_line = -1;
4052 else if (dwarf_line >= 0
4053 && nbytes == 2
4054 && exp->X_op == O_constant
4055 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
4056 listing_source_line ((unsigned int) dwarf_line);
4057 else if (nbytes == 4
4058 && exp->X_op == O_constant
4059 && exp->X_add_number >= 0)
4060 dwarf_line = exp->X_add_number;
4061 else
4062 dwarf_line = -1;
4063 }
4064
4065 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4066 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4067 AT_sibling (0x12) followed by a four byte address of the sibling
4068 followed by a 2 byte AT_name (0x38) followed by the name of the
4069 file. We look for that case here. */
4070 {
4071 static int dwarf_file = 0;
4072
4073 if (strcmp (segment_name (now_seg), ".debug") != 0)
4074 dwarf_file = 0;
4075 else if (dwarf_file == 0
4076 && nbytes == 2
4077 && exp->X_op == O_constant
4078 && exp->X_add_number == 0x11)
4079 dwarf_file = 1;
4080 else if (dwarf_file == 1
4081 && nbytes == 2
4082 && exp->X_op == O_constant
4083 && exp->X_add_number == 0x12)
4084 dwarf_file = 2;
4085 else if (dwarf_file == 2
4086 && nbytes == 4)
4087 dwarf_file = 3;
4088 else if (dwarf_file == 3
4089 && nbytes == 2
4090 && exp->X_op == O_constant
4091 && exp->X_add_number == 0x38)
4092 dwarf_file = 4;
4093 else
4094 dwarf_file = 0;
4095
4096 /* The variable dwarf_file_string tells stringer that the string
4097 may be the name of the source file. */
4098 if (dwarf_file == 4)
4099 dwarf_file_string = 1;
4100 else
4101 dwarf_file_string = 0;
4102 }
4103#endif
4104#endif
4105
4106 if (check_eh_frame (exp, &nbytes))
4107 return;
4108
4109 op = exp->X_op;
4110
4111 /* Allow `.word 0' in the absolute section. */
4112 if (now_seg == absolute_section)
4113 {
4114 if (op != O_constant || exp->X_add_number != 0)
4115 as_bad (_("attempt to store value in absolute section"));
4116 abs_section_offset += nbytes;
4117 return;
4118 }
4119
4120 /* Handle a negative bignum. */
4121 if (op == O_uminus
4122 && exp->X_add_number == 0
2b47531b
ILT		 4123 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
4124 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
252b5132
RH		 4125 {
4126 int i;
4127 unsigned long carry;
4128
2b47531b 4129 exp = symbol_get_value_expression (exp->X_add_symbol);
252b5132
RH		 4130
4131 /* Negate the bignum: one's complement each digit and add 1. */
4132 carry = 1;
4133 for (i = 0; i < exp->X_add_number; i++)
4134 {
4135 unsigned long next;
4136
041ff4dd 4137 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
252b5132
RH		 4138 & LITTLENUM_MASK)
4139 + carry);
4140 generic_bignum[i] = next & LITTLENUM_MASK;
4141 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4142 }
4143
4144 /* We can ignore any carry out, because it will be handled by
4145 extra_digit if it is needed. */
4146
4147 extra_digit = (valueT) -1;
4148 op = O_big;
4149 }
4150
4151 if (op == O_absent || op == O_illegal)
4152 {
4153 as_warn (_("zero assumed for missing expression"));
4154 exp->X_add_number = 0;
4155 op = O_constant;
4156 }
4157 else if (op == O_big && exp->X_add_number <= 0)
4158 {
0e389e77 4159 as_bad (_("floating point number invalid"));
252b5132
RH		 4160 exp->X_add_number = 0;
4161 op = O_constant;
4162 }
4163 else if (op == O_register)
4164 {
4165 as_warn (_("register value used as expression"));
4166 op = O_constant;
4167 }
4168
4169 p = frag_more ((int) nbytes);
4170
4171#ifndef WORKING_DOT_WORD
4172 /* If we have the difference of two symbols in a word, save it on
4173 the broken_words list. See the code in write.c. */
4174 if (op == O_subtract && nbytes == 2)
4175 {
4176 struct broken_word *x;
4177
4178 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
4179 x->next_broken_word = broken_words;
4180 broken_words = x;
4181 x->seg = now_seg;
4182 x->subseg = now_subseg;
4183 x->frag = frag_now;
4184 x->word_goes_here = p;
4185 x->dispfrag = 0;
4186 x->add = exp->X_add_symbol;
4187 x->sub = exp->X_op_symbol;
4188 x->addnum = exp->X_add_number;
4189 x->added = 0;
dc59a897 4190 x->use_jump = 0;
252b5132
RH		 4191 new_broken_words++;
4192 return;
4193 }
4194#endif
4195
4196 /* If we have an integer, but the number of bytes is too large to
4197 pass to md_number_to_chars, handle it as a bignum. */
4198 if (op == O_constant && nbytes > sizeof (valueT))
4199 {
e5604d79
RS		 4200 extra_digit = exp->X_unsigned ? 0 : -1;
4201 convert_to_bignum (exp);
4202 op = O_big;
252b5132
RH		 4203 }
4204
4205 if (op == O_constant)
4206 {
3d540e93
NC		 4207 valueT get;
4208 valueT use;
4209 valueT mask;
252b5132 4210 valueT hibit;
3d540e93 4211 valueT unmask;
252b5132
RH		 4212
4213 /* JF << of >= number of bits in the object is undefined. In
041ff4dd 4214 particular SPARC (Sun 4) has problems. */
252b5132
RH		 4215 if (nbytes >= sizeof (valueT))
4216 {
4217 mask = 0;
4218 if (nbytes > sizeof (valueT))
4219 hibit = 0;
4220 else
4221 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4222 }
4223 else
4224 {
041ff4dd 4225 /* Don't store these bits. */
252b5132
RH		 4226 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4227 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4228 }
4229
041ff4dd 4230 unmask = ~mask; /* Do store these bits. */
252b5132
RH		 4231
4232#ifdef NEVER
4233 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
041ff4dd 4234 mask = ~(unmask >> 1); /* Includes sign bit now. */
252b5132
RH		 4235#endif
4236
4237 get = exp->X_add_number;
4238 use = get & unmask;
4239 if ((get & mask) != 0
4240 && ((get & mask) != mask
4241 || (get & hibit) == 0))
041ff4dd 4242 { /* Leading bits contain both 0s & 1s. */
b6ac5419 4243#if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
6e3d6dc1 4244#ifndef __MSVCRT__
5c612369
NC		 4245 as_warn (_("value 0x%llx truncated to 0x%llx"),
4246 (unsigned long long) get, (unsigned long long) use);
6e3d6dc1
NC		 4247#else
4248 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4249 (unsigned long long) get, (unsigned long long) use);
4250#endif
b6ac5419
AM		 4251#else
4252 as_warn (_("value 0x%lx truncated to 0x%lx"),
4253 (unsigned long) get, (unsigned long) use);
4254#endif
252b5132 4255 }
041ff4dd 4256 /* Put bytes in right order. */
252b5132
RH		 4257 md_number_to_chars (p, use, (int) nbytes);
4258 }
4259 else if (op == O_big)
4260 {
4261 unsigned int size;
4262 LITTLENUM_TYPE *nums;
4263
4264 know (nbytes % CHARS_PER_LITTLENUM == 0);
4265
4266 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4267 if (nbytes < size)
4268 {
0e389e77 4269 as_warn (_("bignum truncated to %d bytes"), nbytes);
252b5132
RH		 4270 size = nbytes;
4271 }
4272
4273 if (target_big_endian)
4274 {
4275 while (nbytes > size)
4276 {
4277 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4278 nbytes -= CHARS_PER_LITTLENUM;
4279 p += CHARS_PER_LITTLENUM;
4280 }
4281
4282 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
ceac3f62 4283 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 4284 {
4285 --nums;
4286 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4287 size -= CHARS_PER_LITTLENUM;
4288 p += CHARS_PER_LITTLENUM;
4289 }
4290 }
4291 else
4292 {
4293 nums = generic_bignum;
ceac3f62 4294 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 4295 {
4296 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4297 ++nums;
4298 size -= CHARS_PER_LITTLENUM;
4299 p += CHARS_PER_LITTLENUM;
4300 nbytes -= CHARS_PER_LITTLENUM;
4301 }
4302
ceac3f62 4303 while (nbytes >= CHARS_PER_LITTLENUM)
252b5132
RH		 4304 {
4305 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4306 nbytes -= CHARS_PER_LITTLENUM;
4307 p += CHARS_PER_LITTLENUM;
4308 }
4309 }
4310 }
4311 else
7ddd14de
BW		 4312 emit_expr_fix (exp, nbytes, frag_now, p);
4313}
4314
4315void
4316emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
4317{
4318 memset (p, 0, nbytes);
252b5132 4319
7ddd14de 4320 /* Generate a fixS to record the symbol value. */
252b5132 4321
252b5132 4322#ifdef TC_CONS_FIX_NEW
7ddd14de 4323 TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
252b5132 4324#else
7ddd14de
BW		 4325 {
4326 bfd_reloc_code_real_type r;
252b5132 4327
7ddd14de
BW		 4328 switch (nbytes)
4329 {
4330 case 1:
4331 r = BFD_RELOC_8;
4332 break;
4333 case 2:
4334 r = BFD_RELOC_16;
4335 break;
d4f4f3fb
AM		 4336 case 3:
4337 r = BFD_RELOC_24;
4338 break;
7ddd14de
BW		 4339 case 4:
4340 r = BFD_RELOC_32;
4341 break;
4342 case 8:
4343 r = BFD_RELOC_64;
4344 break;
4345 default:
4346 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4347 r = BFD_RELOC_32;
4348 break;
252b5132 4349 }
7ddd14de
BW		 4350 fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
4351 0, r);
4352 }
252b5132 4353#endif
252b5132
RH		 4354}
4355\f
4356#ifdef BITFIELD_CONS_EXPRESSIONS
4357
4358/* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4359 w:x,y:z, where w and y are bitwidths and x and y are values. They
4360 then pack them all together. We do a little better in that we allow
4361 them in words, longs, etc. and we'll pack them in target byte order
4362 for you.
4363
47eebc20 4364 The rules are: pack least significant bit first, if a field doesn't
252b5132
RH		 4365 entirely fit, put it in the next unit. Overflowing the bitfield is
4366 explicitly *not* even a warning. The bitwidth should be considered
4367 a "mask".
4368
4369 To use this function the tc-XXX.h file should define
4370 BITFIELD_CONS_EXPRESSIONS. */
4371
041ff4dd 4372static void
252b5132
RH		 4373parse_bitfield_cons (exp, nbytes)
4374 expressionS *exp;
4375 unsigned int nbytes;
4376{
4377 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4378 char *hold = input_line_pointer;
4379
4380 (void) expression (exp);
4381
4382 if (*input_line_pointer == ':')
041ff4dd
NC		 4383 {
4384 /* Bitfields. */
252b5132
RH		 4385 long value = 0;
4386
4387 for (;;)
4388 {
4389 unsigned long width;
4390
4391 if (*input_line_pointer != ':')
4392 {
4393 input_line_pointer = hold;
4394 break;
041ff4dd 4395 } /* Next piece is not a bitfield. */
252b5132
RH		 4396
4397 /* In the general case, we can't allow
4398 full expressions with symbol
4399 differences and such. The relocation
4400 entries for symbols not defined in this
4401 assembly would require arbitrary field
4402 widths, positions, and masks which most
4403 of our current object formats don't
4404 support.
4405
4406 In the specific case where a symbol
4407 *is* defined in this assembly, we
4408 *could* build fixups and track it, but
4409 this could lead to confusion for the
4410 backends. I'm lazy. I'll take any
4411 SEG_ABSOLUTE. I think that means that
4412 you can use a previous .set or
041ff4dd 4413 .equ type symbol. xoxorich. */
252b5132
RH		 4414
4415 if (exp->X_op == O_absent)
4416 {
4417 as_warn (_("using a bit field width of zero"));
4418 exp->X_add_number = 0;
4419 exp->X_op = O_constant;
041ff4dd 4420 } /* Implied zero width bitfield. */
252b5132
RH		 4421
4422 if (exp->X_op != O_constant)
4423 {
4424 *input_line_pointer = '\0';
4425 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4426 *input_line_pointer = ':';
4427 demand_empty_rest_of_line ();
4428 return;
041ff4dd 4429 } /* Too complex. */
252b5132
RH		 4430
4431 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4432 {
4433 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4434 width, nbytes, (BITS_PER_CHAR * nbytes));
4435 width = BITS_PER_CHAR * nbytes;
041ff4dd 4436 } /* Too big. */
252b5132
RH		 4437
4438 if (width > bits_available)
4439 {
4440 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4441 input_line_pointer = hold;
4442 exp->X_add_number = value;
4443 break;
041ff4dd 4444 } /* Won't fit. */
252b5132 4445
ef99799a
KH		 4446 /* Skip ':'. */
4447 hold = ++input_line_pointer;
252b5132
RH		 4448
4449 (void) expression (exp);
4450 if (exp->X_op != O_constant)
4451 {
4452 char cache = *input_line_pointer;
4453
4454 *input_line_pointer = '\0';
4455 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4456 *input_line_pointer = cache;
4457 demand_empty_rest_of_line ();
4458 return;
041ff4dd 4459 } /* Too complex. */
252b5132
RH		 4460
4461 value |= ((~(-1 << width) & exp->X_add_number)
4462 << ((BITS_PER_CHAR * nbytes) - bits_available));
4463
4464 if ((bits_available -= width) == 0
4465 || is_it_end_of_statement ()
4466 || *input_line_pointer != ',')
4467 {
4468 break;
041ff4dd 4469 } /* All the bitfields we're gonna get. */
252b5132
RH		 4470
4471 hold = ++input_line_pointer;
4472 (void) expression (exp);
041ff4dd 4473 }
252b5132
RH		 4474
4475 exp->X_add_number = value;
4476 exp->X_op = O_constant;
4477 exp->X_unsigned = 1;
041ff4dd
NC		 4478 }
4479}
252b5132
RH		 4480
4481#endif /* BITFIELD_CONS_EXPRESSIONS */
4482\f
4483/* Handle an MRI style string expression. */
4484
abd63a32 4485#ifdef TC_M68K
252b5132
RH		 4486static void
4487parse_mri_cons (exp, nbytes)
4488 expressionS *exp;
4489 unsigned int nbytes;
4490{
4491 if (*input_line_pointer != '\''
4492 && (input_line_pointer[1] != '\''
4493 || (*input_line_pointer != 'A'
4494 && *input_line_pointer != 'E')))
4495 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4496 else
4497 {
4498 unsigned int scan;
4499 unsigned int result = 0;
4500
4501 /* An MRI style string. Cut into as many bytes as will fit into
4502 a nbyte chunk, left justify if necessary, and separate with
4503 commas so we can try again later. */
4504 if (*input_line_pointer == 'A')
4505 ++input_line_pointer;
4506 else if (*input_line_pointer == 'E')
4507 {
4508 as_bad (_("EBCDIC constants are not supported"));
4509 ++input_line_pointer;
4510 }
4511
4512 input_line_pointer++;
4513 for (scan = 0; scan < nbytes; scan++)
4514 {
4515 if (*input_line_pointer == '\'')
4516 {
4517 if (input_line_pointer[1] == '\'')
4518 {
4519 input_line_pointer++;
4520 }
4521 else
4522 break;
4523 }
4524 result = (result << 8) | (*input_line_pointer++);
4525 }
4526
041ff4dd 4527 /* Left justify. */
252b5132
RH		 4528 while (scan < nbytes)
4529 {
4530 result <<= 8;
4531 scan++;
4532 }
f0e652b4 4533
041ff4dd 4534 /* Create correct expression. */
252b5132
RH		 4535 exp->X_op = O_constant;
4536 exp->X_add_number = result;
f0e652b4 4537
041ff4dd 4538 /* Fake it so that we can read the next char too. */
252b5132
RH		 4539 if (input_line_pointer[0] != '\'' ||
4540 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4541 {
4542 input_line_pointer -= 2;
4543 input_line_pointer[0] = ',';
4544 input_line_pointer[1] = '\'';
4545 }
4546 else
4547 input_line_pointer++;
4548 }
4549}
abd63a32 4550#endif /* TC_M68K */
252b5132
RH		 4551\f
4552#ifdef REPEAT_CONS_EXPRESSIONS
4553
4554/* Parse a repeat expression for cons. This is used by the MIPS
4555 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4556 object file COUNT times.
4557
4558 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4559
4560static void
4561parse_repeat_cons (exp, nbytes)
4562 expressionS *exp;
4563 unsigned int nbytes;
4564{
4565 expressionS count;
3d540e93 4566 int i;
252b5132
RH		 4567
4568 expression (exp);
4569
4570 if (*input_line_pointer != ':')
4571 {
4572 /* No repeat count. */
4573 return;
4574 }
4575
4576 ++input_line_pointer;
4577 expression (&count);
4578 if (count.X_op != O_constant
4579 || count.X_add_number <= 0)
4580 {
0e389e77 4581 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 4582 return;
4583 }
4584
4585 /* The cons function is going to output this expression once. So we
4586 output it count - 1 times. */
4587 for (i = count.X_add_number - 1; i > 0; i--)
4588 emit_expr (exp, nbytes);
4589}
4590
4591#endif /* REPEAT_CONS_EXPRESSIONS */
4592\f
4593/* Parse a floating point number represented as a hex constant. This
4594 permits users to specify the exact bits they want in the floating
4595 point number. */
4596
4597static int
39e6acbd 4598hex_float (int float_type, char *bytes)
252b5132
RH		 4599{
4600 int length;
4601 int i;
4602
4603 switch (float_type)
4604 {
4605 case 'f':
4606 case 'F':
4607 case 's':
4608 case 'S':
4609 length = 4;
4610 break;
4611
4612 case 'd':
4613 case 'D':
4614 case 'r':
4615 case 'R':
4616 length = 8;
4617 break;
4618
4619 case 'x':
4620 case 'X':
4621 length = 12;
4622 break;
4623
4624 case 'p':
4625 case 'P':
4626 length = 12;
4627 break;
4628
4629 default:
0e389e77 4630 as_bad (_("unknown floating type type '%c'"), float_type);
252b5132
RH		 4631 return -1;
4632 }
4633
4634 /* It would be nice if we could go through expression to parse the
4635 hex constant, but if we get a bignum it's a pain to sort it into
4636 the buffer correctly. */
4637 i = 0;
4638 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4639 {
4640 int d;
4641
4642 /* The MRI assembler accepts arbitrary underscores strewn about
041ff4dd 4643 through the hex constant, so we ignore them as well. */
252b5132
RH		 4644 if (*input_line_pointer == '_')
4645 {
4646 ++input_line_pointer;
4647 continue;
4648 }
4649
4650 if (i >= length)
4651 {
0e389e77 4652 as_warn (_("floating point constant too large"));
252b5132
RH		 4653 return -1;
4654 }
4655 d = hex_value (*input_line_pointer) << 4;
4656 ++input_line_pointer;
4657 while (*input_line_pointer == '_')
4658 ++input_line_pointer;
4659 if (hex_p (*input_line_pointer))
4660 {
4661 d += hex_value (*input_line_pointer);
4662 ++input_line_pointer;
4663 }
4664 if (target_big_endian)
4665 bytes[i] = d;
4666 else
4667 bytes[length - i - 1] = d;
4668 ++i;
4669 }
4670
4671 if (i < length)
4672 {
4673 if (target_big_endian)
4674 memset (bytes + i, 0, length - i);
4675 else
4676 memset (bytes, 0, length - i);
4677 }
4678
4679 return length;
4680}
4681
d6415f6c 4682/* float_cons()
f0e652b4 4683
041ff4dd
NC		 4684 CONStruct some more frag chars of .floats .ffloats etc.
4685 Makes 0 or more new frags.
4686 If need_pass_2 == 1, no frags are emitted.
4687 This understands only floating literals, not expressions. Sorry.
f0e652b4 4688
041ff4dd
NC		 4689 A floating constant is defined by atof_generic(), except it is preceded
4690 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4691 reading, I decided to be incompatible. This always tries to give you
4692 rounded bits to the precision of the pseudo-op. Former AS did premature
47eebc20 4693 truncation, restored noisy bits instead of trailing 0s AND gave you
041ff4dd
NC		 4694 a choice of 2 flavours of noise according to which of 2 floating-point
4695 scanners you directed AS to use.
f0e652b4 4696
041ff4dd 4697 In: input_line_pointer->whitespace before, or '0' of flonum. */
252b5132
RH		 4698
4699void
39e6acbd 4700float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
3d540e93 4701 int float_type /* 'f':.ffloat ... 'F':.float ... */)
252b5132 4702{
3d540e93 4703 char *p;
041ff4dd 4704 int length; /* Number of chars in an object. */
3d540e93 4705 char *err; /* Error from scanning floating literal. */
252b5132
RH		 4706 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4707
4708 if (is_it_end_of_statement ())
4709 {
4710 demand_empty_rest_of_line ();
4711 return;
4712 }
4713
4714#ifdef md_flush_pending_output
4715 md_flush_pending_output ();
4716#endif
4717
cc3f603a
JM		 4718#ifdef md_cons_align
4719 md_cons_align (1);
4720#endif
4721
252b5132
RH		 4722 do
4723 {
041ff4dd 4724 /* input_line_pointer->1st char of a flonum (we hope!). */
252b5132
RH		 4725 SKIP_WHITESPACE ();
4726
4727 /* Skip any 0{letter} that may be present. Don't even check if the
d6415f6c
AM		 4728 letter is legal. Someone may invent a "z" format and this routine
4729 has no use for such information. Lusers beware: you get
4730 diagnostics if your input is ill-conditioned. */
252b5132 4731 if (input_line_pointer[0] == '0'
3882b010 4732 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 4733 input_line_pointer += 2;
4734
4735 /* Accept :xxxx, where the x's are hex digits, for a floating
d6415f6c 4736 point with the exact digits specified. */
252b5132
RH		 4737 if (input_line_pointer[0] == ':')
4738 {
4739 ++input_line_pointer;
4740 length = hex_float (float_type, temp);
4741 if (length < 0)
4742 {
4743 ignore_rest_of_line ();
4744 return;
4745 }
4746 }
4747 else
4748 {
4749 err = md_atof (float_type, temp, &length);
4750 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
499ac353 4751 know (err != NULL || length > 0);
252b5132
RH		 4752 if (err)
4753 {
0e389e77 4754 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 4755 ignore_rest_of_line ();
4756 return;
4757 }
4758 }
4759
4760 if (!need_pass_2)
4761 {
4762 int count;
4763
4764 count = 1;
4765
4766#ifdef REPEAT_CONS_EXPRESSIONS
4767 if (*input_line_pointer == ':')
4768 {
4769 expressionS count_exp;
4770
4771 ++input_line_pointer;
4772 expression (&count_exp);
f0e652b4 4773
252b5132
RH		 4774 if (count_exp.X_op != O_constant
4775 || count_exp.X_add_number <= 0)
041ff4dd 4776 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 4777 else
4778 count = count_exp.X_add_number;
4779 }
4780#endif
4781
4782 while (--count >= 0)
4783 {
4784 p = frag_more (length);
4785 memcpy (p, temp, (unsigned int) length);
4786 }
4787 }
4788 SKIP_WHITESPACE ();
4789 }
4790 while (*input_line_pointer++ == ',');
4791
041ff4dd
NC		 4792 /* Put terminator back into stream. */
4793 --input_line_pointer;
252b5132 4794 demand_empty_rest_of_line ();
041ff4dd 4795}
252b5132 4796\f
041ff4dd 4797/* Return the size of a LEB128 value. */
252b5132
RH		 4798
4799static inline int
39e6acbd 4800sizeof_sleb128 (offsetT value)
252b5132 4801{
3d540e93
NC		 4802 int size = 0;
4803 unsigned byte;
252b5132
RH		 4804
4805 do
4806 {
4807 byte = (value & 0x7f);
4808 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4809 Fortunately, we can structure things so that the extra work reduces
4810 to a noop on systems that do things "properly". */
4811 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4812 size += 1;
4813 }
4814 while (!(((value == 0) && ((byte & 0x40) == 0))
4815 || ((value == -1) && ((byte & 0x40) != 0))));
4816
4817 return size;
4818}
4819
4820static inline int
39e6acbd 4821sizeof_uleb128 (valueT value)
252b5132 4822{
3d540e93 4823 int size = 0;
252b5132
RH		 4824
4825 do
4826 {
252b5132
RH		 4827 value >>= 7;
4828 size += 1;
4829 }
4830 while (value != 0);
4831
4832 return size;
4833}
4834
4835int
39e6acbd 4836sizeof_leb128 (valueT value, int sign)
252b5132
RH		 4837{
4838 if (sign)
4839 return sizeof_sleb128 ((offsetT) value);
4840 else
4841 return sizeof_uleb128 (value);
4842}
4843
4844/* Output a LEB128 value. */
4845
4846static inline int
39e6acbd 4847output_sleb128 (char *p, offsetT value)
252b5132 4848{
3d540e93
NC		 4849 char *orig = p;
4850 int more;
252b5132
RH		 4851
4852 do
4853 {
4854 unsigned byte = (value & 0x7f);
4855
4856 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4857 Fortunately, we can structure things so that the extra work reduces
4858 to a noop on systems that do things "properly". */
4859 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4860
4861 more = !((((value == 0) && ((byte & 0x40) == 0))
4862 || ((value == -1) && ((byte & 0x40) != 0))));
4863 if (more)
4864 byte |= 0x80;
4865
4866 *p++ = byte;
4867 }
4868 while (more);
4869
4870 return p - orig;
4871}
4872
4873static inline int
39e6acbd 4874output_uleb128 (char *p, valueT value)
252b5132
RH		 4875{
4876 char *orig = p;
4877
4878 do
4879 {
4880 unsigned byte = (value & 0x7f);
4881 value >>= 7;
4882 if (value != 0)
4883 /* More bytes to follow. */
4884 byte |= 0x80;
4885
4886 *p++ = byte;
4887 }
4888 while (value != 0);
4889
4890 return p - orig;
4891}
4892
4893int
39e6acbd 4894output_leb128 (char *p, valueT value, int sign)
252b5132
RH		 4895{
4896 if (sign)
4897 return output_sleb128 (p, (offsetT) value);
4898 else
4899 return output_uleb128 (p, value);
4900}
4901
4902/* Do the same for bignums. We combine sizeof with output here in that
4903 we don't output for NULL values of P. It isn't really as critical as
4904 for "normal" values that this be streamlined. */
4905
6d4d30bb 4906static inline int
39e6acbd 4907output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4908{
4909 char *orig = p;
4910 valueT val = 0;
4911 int loaded = 0;
4912 unsigned byte;
4913
4914 /* Strip leading sign extensions off the bignum. */
e5604d79
RS		 4915 while (size > 1
4916 && bignum[size - 1] == LITTLENUM_MASK
4917 && bignum[size - 2] > LITTLENUM_MASK / 2)
252b5132
RH		 4918 size--;
4919
4920 do
4921 {
e5604d79
RS		 4922 /* OR in the next part of the littlenum. */
4923 val |= (*bignum << loaded);
4924 loaded += LITTLENUM_NUMBER_OF_BITS;
4925 size--;
4926 bignum++;
4927
4928 /* Add bytes until there are less than 7 bits left in VAL
4929 or until every non-sign bit has been written. */
4930 do
252b5132 4931 {
e5604d79
RS		 4932 byte = val & 0x7f;
4933 loaded -= 7;
4934 val >>= 7;
4935 if (size > 0
4936 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
252b5132 4937 byte |= 0x80;
e5604d79
RS		 4938
4939 if (orig)
4940 *p = byte;
4941 p++;
252b5132 4942 }
e5604d79
RS		 4943 while ((byte & 0x80) != 0 && loaded >= 7);
4944 }
4945 while (size > 0);
252b5132 4946
e5604d79
RS		 4947 /* Mop up any left-over bits (of which there will be less than 7). */
4948 if ((byte & 0x80) != 0)
4949 {
4950 /* Sign-extend VAL. */
4951 if (val & (1 << (loaded - 1)))
4952 val |= ~0 << loaded;
252b5132 4953 if (orig)
e5604d79 4954 *p = val & 0x7f;
252b5132
RH		 4955 p++;
4956 }
252b5132
RH		 4957
4958 return p - orig;
4959}
4960
6d4d30bb 4961static inline int
39e6acbd 4962output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4963{
4964 char *orig = p;
4965 valueT val = 0;
4966 int loaded = 0;
4967 unsigned byte;
4968
4969 /* Strip leading zeros off the bignum. */
4970 /* XXX: Is this needed? */
041ff4dd 4971 while (size > 0 && bignum[size - 1] == 0)
252b5132
RH		 4972 size--;
4973
4974 do
4975 {
4976 if (loaded < 7 && size > 0)
4977 {
4978 val |= (*bignum << loaded);
4979 loaded += 8 * CHARS_PER_LITTLENUM;
4980 size--;
4981 bignum++;
4982 }
4983
4984 byte = val & 0x7f;
4985 loaded -= 7;
4986 val >>= 7;
4987
4988 if (size > 0 || val)
4989 byte |= 0x80;
4990
4991 if (orig)
4992 *p = byte;
4993 p++;
4994 }
4995 while (byte & 0x80);
4996
4997 return p - orig;
4998}
4999
6d4d30bb 5000static int
39e6acbd 5001output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
252b5132
RH		 5002{
5003 if (sign)
5004 return output_big_sleb128 (p, bignum, size);
5005 else
5006 return output_big_uleb128 (p, bignum, size);
5007}
5008
5009/* Generate the appropriate fragments for a given expression to emit a
5010 leb128 value. */
5011
87c245cc 5012static void
39e6acbd 5013emit_leb128_expr (expressionS *exp, int sign)
252b5132
RH		 5014{
5015 operatorT op = exp->X_op;
b7712f8d 5016 unsigned int nbytes;
252b5132
RH		 5017
5018 if (op == O_absent || op == O_illegal)
5019 {
5020 as_warn (_("zero assumed for missing expression"));
5021 exp->X_add_number = 0;
5022 op = O_constant;
5023 }
5024 else if (op == O_big && exp->X_add_number <= 0)
5025 {
0e389e77 5026 as_bad (_("floating point number invalid"));
252b5132
RH		 5027 exp->X_add_number = 0;
5028 op = O_constant;
5029 }
5030 else if (op == O_register)
5031 {
5032 as_warn (_("register value used as expression"));
5033 op = O_constant;
5034 }
e5604d79
RS		 5035 else if (op == O_constant
5036 && sign
5037 && (exp->X_add_number < 0) != !exp->X_unsigned)
5038 {
5039 /* We're outputting a signed leb128 and the sign of X_add_number
5040 doesn't reflect the sign of the original value. Convert EXP
5041 to a correctly-extended bignum instead. */
5042 convert_to_bignum (exp);
5043 op = O_big;
5044 }
252b5132 5045
67a659f6
RH		 5046 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5047 a signal that this is leb128 data. It shouldn't optimize this away. */
b7712f8d 5048 nbytes = (unsigned int) -1;
67a659f6
RH		 5049 if (check_eh_frame (exp, &nbytes))
5050 abort ();
5051
371b7465
RH		 5052 /* Let the backend know that subsequent data may be byte aligned. */
5053#ifdef md_cons_align
5054 md_cons_align (1);
5055#endif
5056
252b5132
RH		 5057 if (op == O_constant)
5058 {
5059 /* If we've got a constant, emit the thing directly right now. */
5060
5061 valueT value = exp->X_add_number;
5062 int size;
5063 char *p;
5064
5065 size = sizeof_leb128 (value, sign);
5066 p = frag_more (size);
5067 output_leb128 (p, value, sign);
5068 }
5069 else if (op == O_big)
5070 {
5071 /* O_big is a different sort of constant. */
5072
5073 int size;
5074 char *p;
5075
5076 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
5077 p = frag_more (size);
5078 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
5079 }
5080 else
5081 {
041ff4dd 5082 /* Otherwise, we have to create a variable sized fragment and
252b5132
RH		 5083 resolve things later. */
5084
041ff4dd 5085 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
252b5132
RH		 5086 make_expr_symbol (exp), 0, (char *) NULL);
5087 }
5088}
5089
5090/* Parse the .sleb128 and .uleb128 pseudos. */
5091
5092void
39e6acbd 5093s_leb128 (int sign)
252b5132
RH		 5094{
5095 expressionS exp;
5096
00bbdfe7
BW		 5097#ifdef md_flush_pending_output
5098 md_flush_pending_output ();
5099#endif
5100
041ff4dd
NC		 5101 do
5102 {
5103 expression (&exp);
5104 emit_leb128_expr (&exp, sign);
5105 }
5106 while (*input_line_pointer++ == ',');
252b5132
RH		 5107
5108 input_line_pointer--;
5109 demand_empty_rest_of_line ();
5110}
5111\f
38a57ae7
NC		 5112static void
5113stringer_append_char (int c, int bitsize)
5114{
5115 if (!target_big_endian)
5116 FRAG_APPEND_1_CHAR (c);
5117
5118 switch (bitsize)
5119 {
5120 case 64:
5121 FRAG_APPEND_1_CHAR (0);
5122 FRAG_APPEND_1_CHAR (0);
5123 FRAG_APPEND_1_CHAR (0);
5124 FRAG_APPEND_1_CHAR (0);
5125 /* Fall through. */
5126 case 32:
5127 FRAG_APPEND_1_CHAR (0);
5128 FRAG_APPEND_1_CHAR (0);
5129 /* Fall through. */
5130 case 16:
5131 FRAG_APPEND_1_CHAR (0);
5132 /* Fall through. */
5133 case 8:
5134 break;
5135 default:
5136 /* Called with invalid bitsize argument. */
5137 abort ();
5138 break;
5139 }
5140 if (target_big_endian)
5141 FRAG_APPEND_1_CHAR (c);
5142}
5143
5144/* Worker to do .ascii etc statements.
5145 Reads 0 or more ',' separated, double-quoted strings.
041ff4dd 5146 Caller should have checked need_pass_2 is FALSE because we don't
38a57ae7
NC		 5147 check it.
5148 Checks for end-of-line.
5149 BITS_APPENDZERO says how many bits are in a target char.
5150 The bottom bit is set if a NUL char should be appended to the strings. */
041ff4dd
NC		 5151
5152void
38a57ae7 5153stringer (int bits_appendzero)
252b5132 5154{
38a57ae7
NC		 5155 const int bitsize = bits_appendzero & ~7;
5156 const int append_zero = bits_appendzero & 1;
5157 unsigned int c;
252b5132
RH		 5158 char *start;
5159
5160#ifdef md_flush_pending_output
5161 md_flush_pending_output ();
5162#endif
5163
cc3f603a
JM		 5164#ifdef md_cons_align
5165 md_cons_align (1);
5166#endif
5167
041ff4dd
NC		 5168 /* The following awkward logic is to parse ZERO or more strings,
5169 comma separated. Recall a string expression includes spaces
5170 before the opening '\"' and spaces after the closing '\"'.
5171 We fake a leading ',' if there is (supposed to be)
5172 a 1st, expression. We keep demanding expressions for each ','. */
252b5132
RH		 5173 if (is_it_end_of_statement ())
5174 {
041ff4dd
NC		 5175 c = 0; /* Skip loop. */
5176 ++input_line_pointer; /* Compensate for end of loop. */
252b5132
RH		 5177 }
5178 else
5179 {
041ff4dd 5180 c = ','; /* Do loop. */
252b5132 5181 }
8ac9ba6c
NC		 5182 /* If we have been switched into the abs_section then we
5183 will not have an obstack onto which we can hang strings. */
5184 if (now_seg == absolute_section)
5185 {
5186 as_bad (_("strings must be placed into a section"));
5187 c = 0;
5188 ignore_rest_of_line ();
5189 }
d6415f6c 5190
252b5132
RH		 5191 while (c == ',' || c == '<' || c == '"')
5192 {
5193 SKIP_WHITESPACE ();
5194 switch (*input_line_pointer)
5195 {
5196 case '\"':
041ff4dd 5197 ++input_line_pointer; /*->1st char of string. */
252b5132 5198 start = input_line_pointer;
38a57ae7 5199
252b5132 5200 while (is_a_char (c = next_char_of_string ()))
38a57ae7
NC		 5201 stringer_append_char (c, bitsize);
5202
252b5132 5203 if (append_zero)
38a57ae7
NC		 5204 stringer_append_char (0, bitsize);
5205
252b5132
RH		 5206 know (input_line_pointer[-1] == '\"');
5207
5208#ifndef NO_LISTING
5209#ifdef OBJ_ELF
5210 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
d6415f6c
AM		 5211 will emit .string with a filename in the .debug section
5212 after a sequence of constants. See the comment in
5213 emit_expr for the sequence. emit_expr will set
5214 dwarf_file_string to non-zero if this string might be a
5215 source file name. */
252b5132
RH		 5216 if (strcmp (segment_name (now_seg), ".debug") != 0)
5217 dwarf_file_string = 0;
5218 else if (dwarf_file_string)
5219 {
5220 c = input_line_pointer[-1];
5221 input_line_pointer[-1] = '\0';
5222 listing_source_file (start);
5223 input_line_pointer[-1] = c;
5224 }
5225#endif
5226#endif
5227
5228 break;
5229 case '<':
5230 input_line_pointer++;
5231 c = get_single_number ();
38a57ae7 5232 stringer_append_char (c, bitsize);
252b5132 5233 if (*input_line_pointer != '>')
38a57ae7
NC		 5234 as_bad (_("expected <nn>"));
5235
252b5132
RH		 5236 input_line_pointer++;
5237 break;
5238 case ',':
5239 input_line_pointer++;
5240 break;
5241 }
5242 SKIP_WHITESPACE ();
5243 c = *input_line_pointer;
5244 }
5245
5246 demand_empty_rest_of_line ();
38a57ae7 5247}
252b5132
RH		 5248\f
5249/* FIXME-SOMEDAY: I had trouble here on characters with the
5250 high bits set. We'll probably also have trouble with
5251 multibyte chars, wide chars, etc. Also be careful about
041ff4dd 5252 returning values bigger than 1 byte. xoxorich. */
252b5132 5253
041ff4dd 5254unsigned int
39e6acbd 5255next_char_of_string (void)
252b5132 5256{
3d540e93 5257 unsigned int c;
252b5132
RH		 5258
5259 c = *input_line_pointer++ & CHAR_MASK;
5260 switch (c)
5261 {
5262 case '\"':
5263 c = NOT_A_CHAR;
5264 break;
5265
5266 case '\n':
0e389e77 5267 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 5268 bump_line_counters ();
5269 break;
5270
5271#ifndef NO_STRING_ESCAPES
5272 case '\\':
5273 switch (c = *input_line_pointer++)
5274 {
5275 case 'b':
5276 c = '\b';
5277 break;
5278
5279 case 'f':
5280 c = '\f';
5281 break;
5282
5283 case 'n':
5284 c = '\n';
5285 break;
5286
5287 case 'r':
5288 c = '\r';
5289 break;
5290
5291 case 't':
5292 c = '\t';
5293 break;
5294
5295 case 'v':
5296 c = '\013';
5297 break;
5298
5299 case '\\':
5300 case '"':
041ff4dd 5301 break; /* As itself. */
252b5132
RH		 5302
5303 case '0':
5304 case '1':
5305 case '2':
5306 case '3':
5307 case '4':
5308 case '5':
5309 case '6':
5310 case '7':
5311 case '8':
5312 case '9':
5313 {
5314 long number;
5315 int i;
5316
041ff4dd 5317 for (i = 0, number = 0;
3882b010 5318 ISDIGIT (c) && i < 3;
041ff4dd 5319 c = *input_line_pointer++, i++)
252b5132
RH		 5320 {
5321 number = number * 8 + c - '0';
5322 }
f0e652b4 5323
252b5132
RH		 5324 c = number & 0xff;
5325 }
5326 --input_line_pointer;
5327 break;
5328
5329 case 'x':
5330 case 'X':
5331 {
5332 long number;
5333
5334 number = 0;
5335 c = *input_line_pointer++;
3882b010 5336 while (ISXDIGIT (c))
252b5132 5337 {
3882b010 5338 if (ISDIGIT (c))
252b5132 5339 number = number * 16 + c - '0';
3882b010 5340 else if (ISUPPER (c))
252b5132
RH		 5341 number = number * 16 + c - 'A' + 10;
5342 else
5343 number = number * 16 + c - 'a' + 10;
5344 c = *input_line_pointer++;
5345 }
5346 c = number & 0xff;
5347 --input_line_pointer;
5348 }
5349 break;
5350
5351 case '\n':
041ff4dd 5352 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
0e389e77 5353 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 5354 c = '\n';
5355 bump_line_counters ();
5356 break;
5357
5358 default:
5359
5360#ifdef ONLY_STANDARD_ESCAPES
0e389e77 5361 as_bad (_("bad escaped character in string"));
252b5132
RH		 5362 c = '?';
5363#endif /* ONLY_STANDARD_ESCAPES */
5364
5365 break;
041ff4dd 5366 }
252b5132
RH		 5367 break;
5368#endif /* ! defined (NO_STRING_ESCAPES) */
5369
5370 default:
5371 break;
041ff4dd 5372 }
252b5132 5373 return (c);
041ff4dd 5374}
252b5132
RH		 5375\f
5376static segT
3d540e93 5377get_segmented_expression (expressionS *expP)
252b5132 5378{
3d540e93 5379 segT retval;
252b5132
RH		 5380
5381 retval = expression (expP);
5382 if (expP->X_op == O_illegal
5383 || expP->X_op == O_absent
5384 || expP->X_op == O_big)
5385 {
0e389e77 5386 as_bad (_("expected address expression"));
252b5132
RH		 5387 expP->X_op = O_constant;
5388 expP->X_add_number = 0;
5389 retval = absolute_section;
5390 }
5391 return retval;
5392}
5393
041ff4dd 5394static segT
3d540e93 5395get_known_segmented_expression (expressionS *expP)
252b5132 5396{
3d540e93 5397 segT retval;
252b5132
RH		 5398
5399 if ((retval = get_segmented_expression (expP)) == undefined_section)
5400 {
5401 /* There is no easy way to extract the undefined symbol from the
5402 expression. */
5403 if (expP->X_add_symbol != NULL
5404 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5405 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5406 S_GET_NAME (expP->X_add_symbol));
5407 else
5408 as_warn (_("some symbol undefined; zero assumed"));
5409 retval = absolute_section;
5410 expP->X_op = O_constant;
5411 expP->X_add_number = 0;
5412 }
5413 know (retval == absolute_section || SEG_NORMAL (retval));
5414 return (retval);
041ff4dd 5415}
252b5132 5416
041ff4dd 5417char /* Return terminator. */
39e6acbd 5418get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
252b5132
RH		 5419{
5420 /* FIXME: val_pointer should probably be offsetT *. */
5421 *val_pointer = (long) get_absolute_expression ();
5422 return (*input_line_pointer++);
5423}
5424\f
041ff4dd
NC		 5425/* Like demand_copy_string, but return NULL if the string contains any '\0's.
5426 Give a warning if that happens. */
5427
252b5132 5428char *
39e6acbd 5429demand_copy_C_string (int *len_pointer)
252b5132 5430{
3d540e93 5431 char *s;
252b5132
RH		 5432
5433 if ((s = demand_copy_string (len_pointer)) != 0)
5434 {
3d540e93 5435 int len;
252b5132
RH		 5436
5437 for (len = *len_pointer; len > 0; len--)
5438 {
5439 if (*s == 0)
5440 {
5441 s = 0;
5442 len = 1;
5443 *len_pointer = 0;
0e389e77 5444 as_bad (_("this string may not contain \'\\0\'"));
252b5132
RH		 5445 }
5446 }
5447 }
f0e652b4 5448
252b5132
RH		 5449 return s;
5450}
5451\f
041ff4dd
NC		 5452/* Demand string, but return a safe (=private) copy of the string.
5453 Return NULL if we can't read a string here. */
5454
252b5132 5455char *
39e6acbd 5456demand_copy_string (int *lenP)
252b5132 5457{
3d540e93
NC		 5458 unsigned int c;
5459 int len;
252b5132
RH		 5460 char *retval;
5461
5462 len = 0;
5463 SKIP_WHITESPACE ();
5464 if (*input_line_pointer == '\"')
5465 {
041ff4dd 5466 input_line_pointer++; /* Skip opening quote. */
252b5132
RH		 5467
5468 while (is_a_char (c = next_char_of_string ()))
5469 {
5470 obstack_1grow (&notes, c);
5471 len++;
5472 }
5473 /* JF this next line is so demand_copy_C_string will return a
041ff4dd 5474 null terminated string. */
252b5132 5475 obstack_1grow (&notes, '\0');
1e9cc1c2 5476 retval = (char *) obstack_finish (&notes);
252b5132
RH		 5477 }
5478 else
5479 {
c95b35a9 5480 as_bad (_("missing string"));
252b5132
RH		 5481 retval = NULL;
5482 ignore_rest_of_line ();
5483 }
5484 *lenP = len;
5485 return (retval);
041ff4dd 5486}
252b5132 5487\f
041ff4dd 5488/* In: Input_line_pointer->next character.
f0e652b4 5489
041ff4dd 5490 Do: Skip input_line_pointer over all whitespace.
f0e652b4 5491
041ff4dd
NC		 5492 Out: 1 if input_line_pointer->end-of-line. */
5493
5494int
39e6acbd 5495is_it_end_of_statement (void)
252b5132
RH		 5496{
5497 SKIP_WHITESPACE ();
5498 return (is_end_of_line[(unsigned char) *input_line_pointer]);
041ff4dd 5499}
252b5132 5500
041ff4dd 5501void
39e6acbd 5502equals (char *sym_name, int reassign)
252b5132 5503{
252b5132 5504 char *stop = NULL;
fb25138b 5505 char stopc = 0;
252b5132
RH		 5506
5507 input_line_pointer++;
5508 if (*input_line_pointer == '=')
5509 input_line_pointer++;
9497f5ac
NC		 5510 if (reassign < 0 && *input_line_pointer == '=')
5511 input_line_pointer++;
252b5132
RH		 5512
5513 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5514 input_line_pointer++;
5515
5516 if (flag_mri)
5517 stop = mri_comment_field (&stopc);
5518
9497f5ac 5519 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
252b5132
RH		 5520
5521 if (flag_mri)
31d20a21
AM		 5522 {
5523 demand_empty_rest_of_line ();
5524 mri_comment_end (stop, stopc);
5525 }
041ff4dd 5526}
252b5132 5527
7e005732
NC		 5528/* .incbin -- include a file verbatim at the current location. */
5529
5530void
39e6acbd 5531s_incbin (int x ATTRIBUTE_UNUSED)
7e005732
NC		 5532{
5533 FILE * binfile;
5534 char * path;
5535 char * filename;
5536 char * binfrag;
5537 long skip = 0;
5538 long count = 0;
5539 long bytes;
5540 int len;
5541
5542#ifdef md_flush_pending_output
5543 md_flush_pending_output ();
5544#endif
5545
cc3f603a
JM		 5546#ifdef md_cons_align
5547 md_cons_align (1);
5548#endif
5549
7e005732
NC		 5550 SKIP_WHITESPACE ();
5551 filename = demand_copy_string (& len);
5552 if (filename == NULL)
5553 return;
5554
5555 SKIP_WHITESPACE ();
5556
5557 /* Look for optional skip and count. */
5558 if (* input_line_pointer == ',')
5559 {
5560 ++ input_line_pointer;
5561 skip = get_absolute_expression ();
5562
5563 SKIP_WHITESPACE ();
5564
5565 if (* input_line_pointer == ',')
5566 {
5567 ++ input_line_pointer;
5568
5569 count = get_absolute_expression ();
5570 if (count == 0)
5571 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5572
5573 SKIP_WHITESPACE ();
5574 }
5575 }
5576
5577 demand_empty_rest_of_line ();
5578
5579 /* Try opening absolute path first, then try include dirs. */
f740e790 5580 binfile = fopen (filename, FOPEN_RB);
7e005732
NC		 5581 if (binfile == NULL)
5582 {
5583 int i;
5584
1e9cc1c2 5585 path = (char *) xmalloc ((unsigned long) len + include_dir_maxlen + 5);
7e005732
NC		 5586
5587 for (i = 0; i < include_dir_count; i++)
5588 {
5589 sprintf (path, "%s/%s", include_dirs[i], filename);
5590
f740e790 5591 binfile = fopen (path, FOPEN_RB);
7e005732
NC		 5592 if (binfile != NULL)
5593 break;
5594 }
5595
5596 if (binfile == NULL)
5597 as_bad (_("file not found: %s"), filename);
5598 }
5599 else
5600 path = xstrdup (filename);
5601
5602 if (binfile)
5603 {
f740e790
NC		 5604 long file_len;
5605
7e005732
NC		 5606 register_dependency (path);
5607
5608 /* Compute the length of the file. */
5609 if (fseek (binfile, 0, SEEK_END) != 0)
5610 {
5611 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5612 goto done;
5613 }
f740e790 5614 file_len = ftell (binfile);
7e005732 5615
c556cc9c 5616 /* If a count was not specified use the remainder of the file. */
7e005732 5617 if (count == 0)
c556cc9c 5618 count = file_len - skip;
7e005732 5619
c556cc9c 5620 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
7e005732 5621 {
c556cc9c 5622 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
f740e790 5623 skip, count, file_len);
7e005732
NC		 5624 goto done;
5625 }
5626
5627 if (fseek (binfile, skip, SEEK_SET) != 0)
5628 {
5629 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5630 goto done;
5631 }
5632
5633 /* Allocate frag space and store file contents in it. */
5634 binfrag = frag_more (count);
5635
5636 bytes = fread (binfrag, 1, count, binfile);
5637 if (bytes < count)
5638 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5639 path, bytes, count);
5640 }
5641done:
5642 if (binfile != NULL)
5643 fclose (binfile);
5644 if (path)
5645 free (path);
5646}
5647
041ff4dd 5648/* .include -- include a file at this point. */
252b5132 5649
041ff4dd 5650void
39e6acbd 5651s_include (int arg ATTRIBUTE_UNUSED)
252b5132 5652{
252b5132
RH		 5653 char *filename;
5654 int i;
1e9cc1c2 5655 FILE *try_file;
252b5132
RH		 5656 char *path;
5657
041ff4dd 5658 if (!flag_m68k_mri)
252b5132
RH		 5659 {
5660 filename = demand_copy_string (&i);
5661 if (filename == NULL)
5662 {
5663 /* demand_copy_string has already printed an error and
d6415f6c 5664 called ignore_rest_of_line. */
252b5132
RH		 5665 return;
5666 }
5667 }
5668 else
5669 {
5670 SKIP_WHITESPACE ();
5671 i = 0;
041ff4dd 5672 while (!is_end_of_line[(unsigned char) *input_line_pointer]
252b5132
RH		 5673 && *input_line_pointer != ' '
5674 && *input_line_pointer != '\t')
5675 {
5676 obstack_1grow (&notes, *input_line_pointer);
5677 ++input_line_pointer;
5678 ++i;
5679 }
f0e652b4 5680
252b5132 5681 obstack_1grow (&notes, '\0');
1e9cc1c2 5682 filename = (char *) obstack_finish (&notes);
041ff4dd 5683 while (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 5684 ++input_line_pointer;
5685 }
f0e652b4 5686
252b5132 5687 demand_empty_rest_of_line ();
1e9cc1c2
NC		 5688 path = (char *) xmalloc ((unsigned long) i
5689 + include_dir_maxlen + 5 /* slop */ );
f0e652b4 5690
252b5132
RH		 5691 for (i = 0; i < include_dir_count; i++)
5692 {
5693 strcpy (path, include_dirs[i]);
5694 strcat (path, "/");
5695 strcat (path, filename);
1e9cc1c2 5696 if (0 != (try_file = fopen (path, FOPEN_RT)))
252b5132 5697 {
1e9cc1c2 5698 fclose (try_file);
252b5132
RH		 5699 goto gotit;
5700 }
5701 }
f0e652b4 5702
252b5132
RH		 5703 free (path);
5704 path = filename;
5705gotit:
041ff4dd 5706 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
252b5132 5707 register_dependency (path);
9f10757c 5708 input_scrub_insert_file (path);
041ff4dd 5709}
252b5132 5710
041ff4dd 5711void
39e6acbd 5712add_include_dir (char *path)
252b5132
RH		 5713{
5714 int i;
5715
5716 if (include_dir_count == 0)
5717 {
5718 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
041ff4dd 5719 include_dirs[0] = "."; /* Current dir. */
252b5132
RH		 5720 include_dir_count = 2;
5721 }
5722 else
5723 {
5724 include_dir_count++;
041ff4dd
NC		 5725 include_dirs =
5726 (char **) realloc (include_dirs,
5727 include_dir_count * sizeof (*include_dirs));
252b5132
RH		 5728 }
5729
041ff4dd 5730 include_dirs[include_dir_count - 1] = path; /* New one. */
252b5132
RH		 5731
5732 i = strlen (path);
5733 if (i > include_dir_maxlen)
5734 include_dir_maxlen = i;
041ff4dd 5735}
252b5132
RH		 5736\f
5737/* Output debugging information to denote the source file. */
5738
5739static void
39e6acbd 5740generate_file_debug (void)
252b5132
RH		 5741{
5742 if (debug_type == DEBUG_STABS)
5743 stabs_generate_asm_file ();
5744}
5745
5746/* Output line number debugging information for the current source line. */
5747
5748void
39e6acbd 5749generate_lineno_debug (void)
252b5132 5750{
252b5132
RH		 5751 switch (debug_type)
5752 {
5753 case DEBUG_UNSPECIFIED:
5754 case DEBUG_NONE:
4dc7ead9 5755 case DEBUG_DWARF:
252b5132
RH		 5756 break;
5757 case DEBUG_STABS:
5758 stabs_generate_asm_lineno ();
5759 break;
5760 case DEBUG_ECOFF:
5761 ecoff_generate_asm_lineno ();
5762 break;
252b5132 5763 case DEBUG_DWARF2:
4dc7ead9
RH		 5764 /* ??? We could here indicate to dwarf2dbg.c that something
5765 has changed. However, since there is additional backend
5766 support that is required (calling dwarf2_emit_insn), we
5767 let dwarf2dbg.c call as_where on its own. */
252b5132
RH		 5768 break;
5769 }
5770}
5771
5772/* Output debugging information to mark a function entry point or end point.
5773 END_P is zero for .func, and non-zero for .endfunc. */
5774
5775void
39e6acbd 5776s_func (int end_p)
252b5132
RH		 5777{
5778 do_s_func (end_p, NULL);
5779}
5780
5781/* Subroutine of s_func so targets can choose a different default prefix.
5782 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5783
87c245cc 5784static void
39e6acbd 5785do_s_func (int end_p, const char *default_prefix)
252b5132
RH		 5786{
5787 /* Record the current function so that we can issue an error message for
5788 misplaced .func,.endfunc, and also so that .endfunc needs no
5789 arguments. */
5790 static char *current_name;
5791 static char *current_label;
5792
5793 if (end_p)
5794 {
5795 if (current_name == NULL)
5796 {
5797 as_bad (_("missing .func"));
5798 ignore_rest_of_line ();
5799 return;
5800 }
5801
5802 if (debug_type == DEBUG_STABS)
5803 stabs_generate_asm_endfunc (current_name, current_label);
5804
5805 current_name = current_label = NULL;
5806 }
5807 else /* ! end_p */
5808 {
041ff4dd
NC		 5809 char *name, *label;
5810 char delim1, delim2;
252b5132
RH		 5811
5812 if (current_name != NULL)
5813 {
5814 as_bad (_(".endfunc missing for previous .func"));
5815 ignore_rest_of_line ();
5816 return;
5817 }
5818
5819 name = input_line_pointer;
5820 delim1 = get_symbol_end ();
5821 name = xstrdup (name);
5822 *input_line_pointer = delim1;
5823 SKIP_WHITESPACE ();
5824 if (*input_line_pointer != ',')
5825 {
5826 if (default_prefix)
05f4ab67
AM		 5827 {
5828 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
5829 as_fatal ("%s", xstrerror (errno));
5830 }
252b5132
RH		 5831 else
5832 {
7be1c489 5833 char leading_char = bfd_get_symbol_leading_char (stdoutput);
252b5132
RH		 5834 /* Missing entry point, use function's name with the leading
5835 char prepended. */
5836 if (leading_char)
05f4ab67
AM		 5837 {
5838 if (asprintf (&label, "%c%s", leading_char, name) == -1)
5839 as_fatal ("%s", xstrerror (errno));
5840 }
252b5132
RH		 5841 else
5842 label = name;
5843 }
5844 }
5845 else
5846 {
5847 ++input_line_pointer;
5848 SKIP_WHITESPACE ();
5849 label = input_line_pointer;
5850 delim2 = get_symbol_end ();
5851 label = xstrdup (label);
5852 *input_line_pointer = delim2;
5853 }
5854
5855 if (debug_type == DEBUG_STABS)
5856 stabs_generate_asm_func (name, label);
5857
5858 current_name = name;
5859 current_label = label;
5860 }
5861
5862 demand_empty_rest_of_line ();
5863}
5864\f
041ff4dd 5865void
39e6acbd 5866s_ignore (int arg ATTRIBUTE_UNUSED)
252b5132 5867{
40a4d956 5868 ignore_rest_of_line ();
252b5132
RH		 5869}
5870
252b5132 5871void
39e6acbd 5872read_print_statistics (FILE *file)
252b5132
RH		 5873{
5874 hash_print_statistics (file, "pseudo-op table", po_hash);
5875}
5876
041ff4dd
NC		 5877/* Inserts the given line into the input stream.
5878
9f10757c
TW		 5879 This call avoids macro/conditionals nesting checking, since the contents of
5880 the line are assumed to replace the contents of a line already scanned.
5881
47eebc20 5882 An appropriate use of this function would be substitution of input lines when
9f10757c
TW		 5883 called by md_start_line_hook(). The given line is assumed to already be
5884 properly scrubbed. */
5885
5886void
39e6acbd 5887input_scrub_insert_line (const char *line)
9f10757c
TW		 5888{
5889 sb newline;
5890 sb_new (&newline);
5891 sb_add_string (&newline, line);
5892 input_scrub_include_sb (&newline, input_line_pointer, 0);
5893 sb_kill (&newline);
5894 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5895}
5896
5897/* Insert a file into the input stream; the path must resolve to an actual
041ff4dd 5898 file; no include path searching or dependency registering is performed. */
9f10757c
TW		 5899
5900void
39e6acbd 5901input_scrub_insert_file (char *path)
9f10757c
TW		 5902{
5903 input_scrub_include_file (path, input_line_pointer);
5904 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5905}
40a4d956
JB		 5906
5907/* Find the end of a line, considering quotation and escaping of quotes. */
5908
5909#if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5910# define TC_SINGLE_QUOTE_STRINGS 1
5911#endif
5912
5913static char *
7592cfd7
NC		 5914_find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
5915 int in_macro)
40a4d956
JB		 5916{
5917 char inquote = '\0';
5918 int inescape = 0;
5919
5920 while (!is_end_of_line[(unsigned char) *s]
5921 || (inquote && !ISCNTRL (*s))
5922 || (inquote == '\'' && flag_mri)
5923#ifdef TC_EOL_IN_INSN
5924 || (insn && TC_EOL_IN_INSN (s))
5925#endif
7592cfd7
NC		 5926 /* PR 6926: When we are parsing the body of a macro the sequence
5927 \@ is special - it refers to the invocation count. If the @
5928 character happens to be registered as a line-separator character
5929 by the target, then the is_end_of_line[] test above will have
5930 returned true, but we need to ignore the line separating
5931 semantics in this particular case. */
5932 || (in_macro && inescape && *s == '@')
40a4d956
JB		 5933 )
5934 {
5935 if (mri_string && *s == '\'')
5936 inquote ^= *s;
5937 else if (inescape)
5938 inescape = 0;
5939 else if (*s == '\\')
5940 inescape = 1;
5941 else if (!inquote
5942 ? *s == '"'
5943#ifdef TC_SINGLE_QUOTE_STRINGS
5944 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5945#endif
5946 : *s == inquote)
5947 inquote ^= *s;
5948 ++s;
5949 }
5950 if (inquote)
5951 as_warn (_("missing closing `%c'"), inquote);
5952 if (inescape)
5953 as_warn (_("stray `\\'"));
5954 return s;
5955}
5956
5957char *
5958find_end_of_line (char *s, int mri_string)
5959{
7592cfd7 5960 return _find_end_of_line (s, mri_string, 0, 0);
40a4d956 5961}
GDB Binutils - Deliverables
This page took 0.873939 seconds and 4 git commands to generate.