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* breakpoint.c (condition_command): Pass condition expression to
[deliverable/binutils-gdb.git] / gas / read.c
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252b5132 1/* read.c - read a source file -
f7e42eb4 2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
aa820537 3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
e5604d79 4 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;
1644 register int temp;
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
RH		 1685{
1686 register char *s;
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;
1920 register long fill = 0;
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
RH		 2430{
2431 register char *name;
2432 register char c;
2433 register char *p;
2434 expressionS exp;
2435 register symbolS *symbolP;
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
RH		 2609{
2610 int on, old_flag;
2611
2612 on = get_absolute_expression ();
2613 old_flag = flag_mri;
2614 if (on != 0)
2615 {
2616 flag_mri = 1;
2617#ifdef TC_M68K
2618 flag_m68k_mri = 1;
2619#endif
2620 macro_mri_mode (1);
2621 }
2622 else
2623 {
2624 flag_mri = 0;
abd63a32 2625#ifdef TC_M68K
252b5132 2626 flag_m68k_mri = 0;
abd63a32 2627#endif
252b5132
RH		 2628 macro_mri_mode (0);
2629 }
2630
2631 /* Operator precedence changes in m68k MRI mode, so we need to
2632 update the operator rankings. */
2633 expr_set_precedence ();
2634
2635#ifdef MRI_MODE_CHANGE
2636 if (on != old_flag)
2637 MRI_MODE_CHANGE (on);
2638#endif
2639
2640 demand_empty_rest_of_line ();
2641}
2642
2643/* Handle changing the location counter. */
2644
2645static void
39e6acbd 2646do_org (segT segment, expressionS *exp, int fill)
252b5132
RH		 2647{
2648 if (segment != now_seg && segment != absolute_section)
0e389e77 2649 as_bad (_("invalid segment \"%s\""), segment_name (segment));
252b5132
RH		 2650
2651 if (now_seg == absolute_section)
2652 {
2653 if (fill != 0)
2654 as_warn (_("ignoring fill value in absolute section"));
2655 if (exp->X_op != O_constant)
2656 {
2657 as_bad (_("only constant offsets supported in absolute section"));
2658 exp->X_add_number = 0;
2659 }
2660 abs_section_offset = exp->X_add_number;
2661 }
2662 else
2663 {
2664 char *p;
2289f85d
AM		 2665 symbolS *sym = exp->X_add_symbol;
2666 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
252b5132 2667
2289f85d
AM		 2668 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2669 {
2670 /* Handle complex expressions. */
2671 sym = make_expr_symbol (exp);
2672 off = 0;
2673 }
2674
2675 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
252b5132
RH		 2676 *p = fill;
2677 }
2678}
2679
041ff4dd 2680void
39e6acbd 2681s_org (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2682{
2683 register segT segment;
2684 expressionS exp;
2685 register long temp_fill;
2686
2687#ifdef md_flush_pending_output
2688 md_flush_pending_output ();
2689#endif
2690
2691 /* The m68k MRI assembler has a different meaning for .org. It
2692 means to create an absolute section at a given address. We can't
2693 support that--use a linker script instead. */
2694 if (flag_m68k_mri)
2695 {
2696 as_bad (_("MRI style ORG pseudo-op not supported"));
2697 ignore_rest_of_line ();
2698 return;
2699 }
2700
2701 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2702 thing as a sub-segment-relative origin. Any absolute origin is
2703 given a warning, then assumed to be segment-relative. Any
2704 segmented origin expression ("foo+42") had better be in the right
2705 segment or the .org is ignored.
2706
2707 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2708 we never know sub-segment sizes when we are reading code. BSD
2709 will crash trying to emit negative numbers of filler bytes in
2710 certain .orgs. We don't crash, but see as-write for that code.
2711
2712 Don't make frag if need_pass_2==1. */
2713 segment = get_known_segmented_expression (&exp);
2714 if (*input_line_pointer == ',')
2715 {
2716 input_line_pointer++;
2717 temp_fill = get_absolute_expression ();
2718 }
2719 else
2720 temp_fill = 0;
2721
2722 if (!need_pass_2)
2723 do_org (segment, &exp, temp_fill);
2724
2725 demand_empty_rest_of_line ();
041ff4dd 2726}
252b5132
RH		 2727
2728/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2729 called by the obj-format routine which handles section changing
2730 when in MRI mode. It will create a new section, and return it. It
2731 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
7be1c489 2732 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
252b5132
RH		 2733
2734void
39e6acbd 2735s_mri_sect (char *type ATTRIBUTE_UNUSED)
252b5132
RH		 2736{
2737#ifdef TC_M68K
2738
2739 char *name;
2740 char c;
2741 segT seg;
2742
2743 SKIP_WHITESPACE ();
041ff4dd 2744
252b5132 2745 name = input_line_pointer;
3882b010 2746 if (!ISDIGIT (*name))
252b5132
RH		 2747 c = get_symbol_end ();
2748 else
2749 {
2750 do
2751 {
2752 ++input_line_pointer;
2753 }
3882b010 2754 while (ISDIGIT (*input_line_pointer));
f0e652b4 2755
252b5132
RH		 2756 c = *input_line_pointer;
2757 *input_line_pointer = '\0';
2758 }
2759
2760 name = xstrdup (name);
2761
2762 *input_line_pointer = c;
2763
2764 seg = subseg_new (name, 0);
2765
2766 if (*input_line_pointer == ',')
2767 {
2768 int align;
2769
2770 ++input_line_pointer;
2771 align = get_absolute_expression ();
2772 record_alignment (seg, align);
2773 }
2774
2775 *type = 'C';
2776 if (*input_line_pointer == ',')
2777 {
2778 c = *++input_line_pointer;
3882b010 2779 c = TOUPPER (c);
252b5132
RH		 2780 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2781 *type = c;
2782 else
2783 as_bad (_("unrecognized section type"));
2784 ++input_line_pointer;
2785
252b5132
RH		 2786 {
2787 flagword flags;
2788
2789 flags = SEC_NO_FLAGS;
2790 if (*type == 'C')
2791 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2792 else if (*type == 'D' || *type == 'M')
2793 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2794 else if (*type == 'R')
2795 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2796 if (flags != SEC_NO_FLAGS)
2797 {
041ff4dd 2798 if (!bfd_set_section_flags (stdoutput, seg, flags))
252b5132
RH		 2799 as_warn (_("error setting flags for \"%s\": %s"),
2800 bfd_section_name (stdoutput, seg),
2801 bfd_errmsg (bfd_get_error ()));
2802 }
2803 }
252b5132
RH		 2804 }
2805
2806 /* Ignore the HP type. */
2807 if (*input_line_pointer == ',')
2808 input_line_pointer += 2;
2809
2810 demand_empty_rest_of_line ();
2811
2812#else /* ! TC_M68K */
2813#ifdef TC_I960
2814
2815 char *name;
2816 char c;
2817 segT seg;
2818
2819 SKIP_WHITESPACE ();
2820
2821 name = input_line_pointer;
2822 c = get_symbol_end ();
2823
2824 name = xstrdup (name);
2825
2826 *input_line_pointer = c;
2827
2828 seg = subseg_new (name, 0);
2829
2830 if (*input_line_pointer != ',')
2831 *type = 'C';
2832 else
2833 {
2834 char *sectype;
2835
2836 ++input_line_pointer;
2837 SKIP_WHITESPACE ();
2838 sectype = input_line_pointer;
2839 c = get_symbol_end ();
2840 if (*sectype == '\0')
2841 *type = 'C';
2842 else if (strcasecmp (sectype, "text") == 0)
2843 *type = 'C';
2844 else if (strcasecmp (sectype, "data") == 0)
2845 *type = 'D';
2846 else if (strcasecmp (sectype, "romdata") == 0)
2847 *type = 'R';
2848 else
2849 as_warn (_("unrecognized section type `%s'"), sectype);
2850 *input_line_pointer = c;
2851 }
2852
2853 if (*input_line_pointer == ',')
2854 {
2855 char *seccmd;
2856
2857 ++input_line_pointer;
2858 SKIP_WHITESPACE ();
2859 seccmd = input_line_pointer;
2860 c = get_symbol_end ();
2861 if (strcasecmp (seccmd, "absolute") == 0)
2862 {
2863 as_bad (_("absolute sections are not supported"));
2864 *input_line_pointer = c;
2865 ignore_rest_of_line ();
2866 return;
2867 }
2868 else if (strcasecmp (seccmd, "align") == 0)
2869 {
2870 int align;
2871
2872 *input_line_pointer = c;
2873 align = get_absolute_expression ();
2874 record_alignment (seg, align);
2875 }
2876 else
2877 {
2878 as_warn (_("unrecognized section command `%s'"), seccmd);
2879 *input_line_pointer = c;
2880 }
2881 }
2882
041ff4dd 2883 demand_empty_rest_of_line ();
252b5132
RH		 2884
2885#else /* ! TC_I960 */
2886 /* The MRI assembler seems to use different forms of .sect for
2887 different targets. */
2888 as_bad ("MRI mode not supported for this target");
2889 ignore_rest_of_line ();
2890#endif /* ! TC_I960 */
2891#endif /* ! TC_M68K */
2892}
2893
2894/* Handle the .print pseudo-op. */
2895
2896void
39e6acbd 2897s_print (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2898{
2899 char *s;
2900 int len;
2901
2902 s = demand_copy_C_string (&len);
d6415f6c
AM		 2903 if (s != NULL)
2904 printf ("%s\n", s);
252b5132
RH		 2905 demand_empty_rest_of_line ();
2906}
2907
2908/* Handle the .purgem pseudo-op. */
2909
2910void
39e6acbd 2911s_purgem (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2912{
2913 if (is_it_end_of_statement ())
2914 {
2915 demand_empty_rest_of_line ();
2916 return;
2917 }
2918
2919 do
2920 {
2921 char *name;
2922 char c;
2923
2924 SKIP_WHITESPACE ();
2925 name = input_line_pointer;
2926 c = get_symbol_end ();
2927 delete_macro (name);
2928 *input_line_pointer = c;
2929 SKIP_WHITESPACE ();
2930 }
2931 while (*input_line_pointer++ == ',');
2932
2933 --input_line_pointer;
2934 demand_empty_rest_of_line ();
2935}
2936
057f53c1 2937/* Handle the .endm/.endr pseudo-ops. */
252b5132 2938
057f53c1
JB		 2939static void
2940s_bad_end (int endr)
7f28ab9d 2941{
057f53c1
JB		 2942 as_warn (_(".end%c encountered without preceeding %s"),
2943 endr ? 'r' : 'm',
2944 endr ? ".rept, .irp, or .irpc" : ".macro");
7f28ab9d
NC		 2945 demand_empty_rest_of_line ();
2946}
2947
2948/* Handle the .rept pseudo-op. */
2949
252b5132 2950void
39e6acbd 2951s_rept (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 2952{
2953 int count;
252b5132
RH		 2954
2955 count = get_absolute_expression ();
2956
041ff4dd 2957 do_repeat (count, "REPT", "ENDR");
6dc19fc4
TW		 2958}
2959
2960/* This function provides a generic repeat block implementation. It allows
041ff4dd 2961 different directives to be used as the start/end keys. */
6dc19fc4
TW		 2962
2963void
39e6acbd 2964do_repeat (int count, const char *start, const char *end)
6dc19fc4
TW		 2965{
2966 sb one;
2967 sb many;
2968
252b5132 2969 sb_new (&one);
7592cfd7 2970 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
252b5132 2971 {
6dc19fc4 2972 as_bad (_("%s without %s"), start, end);
252b5132
RH		 2973 return;
2974 }
2975
2976 sb_new (&many);
2977 while (count-- > 0)
2978 sb_add_sb (&many, &one);
2979
2980 sb_kill (&one);
2981
9f10757c 2982 input_scrub_include_sb (&many, input_line_pointer, 1);
252b5132
RH		 2983 sb_kill (&many);
2984 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2985}
2986
c7927a3c
NC		 2987/* Like do_repeat except that any text matching EXPANDER in the
2988 block is replaced by the itteration count. */
2989
2990void
2991do_repeat_with_expander (int count,
2992 const char * start,
2993 const char * end,
2994 const char * expander)
2995{
2996 sb one;
2997 sb many;
2998
2999 sb_new (&one);
3000 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3001 {
3002 as_bad (_("%s without %s"), start, end);
3003 return;
3004 }
3005
3006 sb_new (&many);
3007
3008 if (expander != NULL && strstr (one.ptr, expander) != NULL)
3009 {
3010 while (count -- > 0)
3011 {
3012 int len;
3013 char * sub;
3014 sb processed;
3015
3016 sb_new (& processed);
3017 sb_add_sb (& processed, & one);
3018 sub = strstr (processed.ptr, expander);
3019 len = sprintf (sub, "%d", count);
3020 gas_assert (len < 8);
3021 strcpy (sub + len, sub + 8);
3022 processed.len -= (8 - len);
3023 sb_add_sb (& many, & processed);
3024 sb_kill (& processed);
3025 }
3026 }
3027 else
3028 while (count-- > 0)
3029 sb_add_sb (&many, &one);
3030
3031 sb_kill (&one);
3032
3033 input_scrub_include_sb (&many, input_line_pointer, 1);
3034 sb_kill (&many);
3035 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3036}
3037
6dc19fc4
TW		 3038/* Skip to end of current repeat loop; EXTRA indicates how many additional
3039 input buffers to skip. Assumes that conditionals preceding the loop end
041ff4dd 3040 are properly nested.
6dc19fc4
TW		 3041
3042 This function makes it easier to implement a premature "break" out of the
3043 loop. The EXTRA arg accounts for other buffers we might have inserted,
041ff4dd 3044 such as line substitutions. */
6dc19fc4
TW		 3045
3046void
39e6acbd 3047end_repeat (int extra)
6dc19fc4
TW		 3048{
3049 cond_exit_macro (macro_nest);
3050 while (extra-- >= 0)
3051 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3052}
3053
be95a9c1 3054static void
9497f5ac 3055assign_symbol (char *name, int mode)
be95a9c1
AM		 3056{
3057 symbolS *symbolP;
3058
3059 if (name[0] == '.' && name[1] == '\0')
3060 {
3061 /* Turn '. = mumble' into a .org mumble. */
3062 segT segment;
3063 expressionS exp;
3064
3065 segment = get_known_segmented_expression (&exp);
3066
3067 if (!need_pass_2)
3068 do_org (segment, &exp, 0);
3069
3070 return;
3071 }
3072
3073 if ((symbolP = symbol_find (name)) == NULL
3074 && (symbolP = md_undefined_symbol (name)) == NULL)
3075 {
3076 symbolP = symbol_find_or_make (name);
3077#ifndef NO_LISTING
3078 /* When doing symbol listings, play games with dummy fragments living
3079 outside the normal fragment chain to record the file and line info
3080 for this symbol. */
3081 if (listing & LISTING_SYMBOLS)
3082 {
3083 extern struct list_info_struct *listing_tail;
31d20a21 3084 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
be95a9c1
AM		 3085 dummy_frag->line = listing_tail;
3086 dummy_frag->fr_symbol = symbolP;
3087 symbol_set_frag (symbolP, dummy_frag);
3088 }
3089#endif
31d20a21
AM		 3090#ifdef OBJ_COFF
3091 /* "set" symbols are local unless otherwise specified. */
3092 SF_SET_LOCAL (symbolP);
be95a9c1
AM		 3093#endif
3094 }
3095
6a2b6326 3096 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
9497f5ac
NC		 3097 {
3098 /* Permit register names to be redefined. */
3099 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3100 && S_GET_SEGMENT (symbolP) != reg_section)
3101 {
3102 as_bad (_("symbol `%s' is already defined"), name);
3103 symbolP = symbol_clone (symbolP, 0);
3104 }
3105 /* If the symbol is volatile, copy the symbol and replace the
3106 original with the copy, so that previous uses of the symbol will
3107 retain the value of the symbol at the point of use. */
89cdfe57 3108 else if (S_IS_VOLATILE (symbolP))
9497f5ac
NC		 3109 symbolP = symbol_clone (symbolP, 1);
3110 }
3111
3112 if (mode == 0)
3113 S_SET_VOLATILE (symbolP);
3114 else if (mode < 0)
3115 S_SET_FORWARD_REF (symbolP);
be95a9c1
AM		 3116
3117 pseudo_set (symbolP);
be95a9c1
AM		 3118}
3119
9497f5ac
NC		 3120/* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3121 then this is .equiv, and it is an error if the symbol is already
3122 defined. If EQUIV is -1, the symbol additionally is a forward
3123 reference. */
252b5132 3124
041ff4dd 3125void
39e6acbd 3126s_set (int equiv)
252b5132 3127{
be95a9c1
AM		 3128 char *name;
3129 char delim;
3130 char *end_name;
252b5132 3131
041ff4dd
NC		 3132 /* Especial apologies for the random logic:
3133 this just grew, and could be parsed much more simply!
3134 Dean in haste. */
252b5132
RH		 3135 name = input_line_pointer;
3136 delim = get_symbol_end ();
3137 end_name = input_line_pointer;
0e389e77 3138 *end_name = delim;
409d19c4 3139
0e389e77 3140 if (name == end_name)
409d19c4
AM		 3141 {
3142 as_bad (_("expected symbol name"));
40a4d956 3143 ignore_rest_of_line ();
409d19c4
AM		 3144 return;
3145 }
3146
252b5132
RH		 3147 SKIP_WHITESPACE ();
3148
3149 if (*input_line_pointer != ',')
3150 {
3151 *end_name = 0;
0e389e77 3152 as_bad (_("expected comma after \"%s\""), name);
252b5132
RH		 3153 *end_name = delim;
3154 ignore_rest_of_line ();
3155 return;
3156 }
3157
3158 input_line_pointer++;
3159 *end_name = 0;
3160
be95a9c1 3161 assign_symbol (name, equiv);
252b5132 3162 *end_name = delim;
31d20a21
AM		 3163
3164 demand_empty_rest_of_line ();
041ff4dd 3165}
252b5132 3166
041ff4dd 3167void
39e6acbd 3168s_space (int mult)
252b5132
RH		 3169{
3170 expressionS exp;
3171 expressionS val;
3172 char *p = 0;
3173 char *stop = NULL;
fb25138b 3174 char stopc = 0;
252b5132
RH		 3175 int bytes;
3176
3177#ifdef md_flush_pending_output
3178 md_flush_pending_output ();
3179#endif
3180
cc3f603a
JM		 3181#ifdef md_cons_align
3182 md_cons_align (1);
3183#endif
3184
252b5132
RH		 3185 if (flag_mri)
3186 stop = mri_comment_field (&stopc);
3187
3188 /* In m68k MRI mode, we need to align to a word boundary, unless
3189 this is ds.b. */
3190 if (flag_m68k_mri && mult > 1)
3191 {
3192 if (now_seg == absolute_section)
3193 {
3194 abs_section_offset += abs_section_offset & 1;
3195 if (line_label != NULL)
3196 S_SET_VALUE (line_label, abs_section_offset);
3197 }
3198 else if (mri_common_symbol != NULL)
3199 {
91d6fa6a 3200 valueT mri_val;
252b5132 3201
91d6fa6a
NC		 3202 mri_val = S_GET_VALUE (mri_common_symbol);
3203 if ((mri_val & 1) != 0)
252b5132 3204 {
91d6fa6a 3205 S_SET_VALUE (mri_common_symbol, mri_val + 1);
252b5132
RH		 3206 if (line_label != NULL)
3207 {
2b47531b
ILT		 3208 expressionS *symexp;
3209
3210 symexp = symbol_get_value_expression (line_label);
3211 know (symexp->X_op == O_symbol);
3212 know (symexp->X_add_symbol == mri_common_symbol);
3213 symexp->X_add_number += 1;
252b5132
RH		 3214 }
3215 }
3216 }
3217 else
3218 {
3219 do_align (1, (char *) NULL, 0, 0);
3220 if (line_label != NULL)
3221 {
2b47531b 3222 symbol_set_frag (line_label, frag_now);
252b5132
RH		 3223 S_SET_VALUE (line_label, frag_now_fix ());
3224 }
3225 }
3226 }
3227
3228 bytes = mult;
3229
3230 expression (&exp);
3231
3232 SKIP_WHITESPACE ();
3233 if (*input_line_pointer == ',')
3234 {
3235 ++input_line_pointer;
3236 expression (&val);
3237 }
3238 else
3239 {
3240 val.X_op = O_constant;
3241 val.X_add_number = 0;
3242 }
3243
3244 if (val.X_op != O_constant
3245 || val.X_add_number < - 0x80
3246 || val.X_add_number > 0xff
3247 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3248 {
9497f5ac 3249 resolve_expression (&exp);
252b5132 3250 if (exp.X_op != O_constant)
0e389e77 3251 as_bad (_("unsupported variable size or fill value"));
252b5132
RH		 3252 else
3253 {
3254 offsetT i;
3255
3256 if (mult == 0)
3257 mult = 1;
3258 bytes = mult * exp.X_add_number;
3259 for (i = 0; i < exp.X_add_number; i++)
3260 emit_expr (&val, mult);
3261 }
3262 }
3263 else
3264 {
9497f5ac
NC		 3265 if (now_seg == absolute_section || mri_common_symbol != NULL)
3266 resolve_expression (&exp);
3267
252b5132
RH		 3268 if (exp.X_op == O_constant)
3269 {
a4a151e6 3270 offsetT repeat;
252b5132
RH		 3271
3272 repeat = exp.X_add_number;
3273 if (mult)
3274 repeat *= mult;
3275 bytes = repeat;
3276 if (repeat <= 0)
3277 {
2d150871
RO		 3278 if (!flag_mri)
3279 as_warn (_(".space repeat count is zero, ignored"));
3280 else if (repeat < 0)
252b5132
RH		 3281 as_warn (_(".space repeat count is negative, ignored"));
3282 goto getout;
3283 }
3284
3285 /* If we are in the absolute section, just bump the offset. */
3286 if (now_seg == absolute_section)
3287 {
3288 abs_section_offset += repeat;
3289 goto getout;
3290 }
3291
3292 /* If we are secretly in an MRI common section, then
3293 creating space just increases the size of the common
3294 symbol. */
3295 if (mri_common_symbol != NULL)
3296 {
3297 S_SET_VALUE (mri_common_symbol,
3298 S_GET_VALUE (mri_common_symbol) + repeat);
3299 goto getout;
3300 }
3301
3302 if (!need_pass_2)
3303 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3304 (offsetT) repeat, (char *) 0);
3305 }
3306 else
3307 {
3308 if (now_seg == absolute_section)
3309 {
3310 as_bad (_("space allocation too complex in absolute section"));
3311 subseg_set (text_section, 0);
3312 }
f0e652b4 3313
252b5132
RH		 3314 if (mri_common_symbol != NULL)
3315 {
3316 as_bad (_("space allocation too complex in common section"));
3317 mri_common_symbol = NULL;
3318 }
f0e652b4 3319
252b5132
RH		 3320 if (!need_pass_2)
3321 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3322 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3323 }
3324
3325 if (p)
3326 *p = val.X_add_number;
3327 }
3328
3329 getout:
3330
3331 /* In MRI mode, after an odd number of bytes, we must align to an
3332 even word boundary, unless the next instruction is a dc.b, ds.b
3333 or dcb.b. */
3334 if (flag_mri && (bytes & 1) != 0)
3335 mri_pending_align = 1;
3336
3337 demand_empty_rest_of_line ();
3338
3339 if (flag_mri)
3340 mri_comment_end (stop, stopc);
3341}
3342
3343/* This is like s_space, but the value is a floating point number with
3344 the given precision. This is for the MRI dcb.s pseudo-op and
3345 friends. */
3346
3347void
39e6acbd 3348s_float_space (int float_type)
252b5132
RH		 3349{
3350 offsetT count;
3351 int flen;
3352 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3353 char *stop = NULL;
fb25138b 3354 char stopc = 0;
252b5132 3355
cc3f603a
JM		 3356#ifdef md_cons_align
3357 md_cons_align (1);
3358#endif
3359
252b5132
RH		 3360 if (flag_mri)
3361 stop = mri_comment_field (&stopc);
3362
3363 count = get_absolute_expression ();
3364
3365 SKIP_WHITESPACE ();
3366 if (*input_line_pointer != ',')
3367 {
3368 as_bad (_("missing value"));
3369 ignore_rest_of_line ();
3370 if (flag_mri)
3371 mri_comment_end (stop, stopc);
3372 return;
3373 }
3374
3375 ++input_line_pointer;
3376
3377 SKIP_WHITESPACE ();
3378
3379 /* Skip any 0{letter} that may be present. Don't even check if the
3380 * letter is legal. */
3381 if (input_line_pointer[0] == '0'
3882b010 3382 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 3383 input_line_pointer += 2;
3384
3385 /* Accept :xxxx, where the x's are hex digits, for a floating point
3386 with the exact digits specified. */
3387 if (input_line_pointer[0] == ':')
3388 {
3389 flen = hex_float (float_type, temp);
3390 if (flen < 0)
3391 {
3392 ignore_rest_of_line ();
3393 if (flag_mri)
3394 mri_comment_end (stop, stopc);
3395 return;
3396 }
3397 }
3398 else
3399 {
3400 char *err;
3401
3402 err = md_atof (float_type, temp, &flen);
3403 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
499ac353 3404 know (err != NULL || flen > 0);
252b5132
RH		 3405 if (err)
3406 {
0e389e77 3407 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 3408 ignore_rest_of_line ();
3409 if (flag_mri)
3410 mri_comment_end (stop, stopc);
3411 return;
3412 }
3413 }
3414
3415 while (--count >= 0)
3416 {
3417 char *p;
3418
3419 p = frag_more (flen);
3420 memcpy (p, temp, (unsigned int) flen);
3421 }
3422
3423 demand_empty_rest_of_line ();
3424
3425 if (flag_mri)
3426 mri_comment_end (stop, stopc);
3427}
3428
3429/* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3430
3431void
39e6acbd 3432s_struct (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 3433{
3434 char *stop = NULL;
fb25138b 3435 char stopc = 0;
252b5132
RH		 3436
3437 if (flag_mri)
3438 stop = mri_comment_field (&stopc);
3439 abs_section_offset = get_absolute_expression ();
a2902af6
TS		 3440#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3441 /* The ELF backend needs to know that we are changing sections, so
3442 that .previous works correctly. */
f43abd2b 3443 if (IS_ELF)
a2902af6
TS		 3444 obj_elf_section_change_hook ();
3445#endif
252b5132
RH		 3446 subseg_set (absolute_section, 0);
3447 demand_empty_rest_of_line ();
3448 if (flag_mri)
3449 mri_comment_end (stop, stopc);
3450}
3451
3452void
39e6acbd 3453s_text (int ignore ATTRIBUTE_UNUSED)
252b5132
RH		 3454{
3455 register int temp;
3456
3457 temp = get_absolute_expression ();
3458 subseg_set (text_section, (subsegT) temp);
3459 demand_empty_rest_of_line ();
3460#ifdef OBJ_VMS
3461 const_flag &= ~IN_DEFAULT_SECTION;
3462#endif
041ff4dd 3463}
06e77878
AO		 3464
3465/* .weakref x, y sets x as an alias to y that, as long as y is not
3466 referenced directly, will cause y to become a weak symbol. */
3467void
3468s_weakref (int ignore ATTRIBUTE_UNUSED)
3469{
3470 char *name;
3471 char delim;
3472 char *end_name;
3473 symbolS *symbolP;
3474 symbolS *symbolP2;
3475 expressionS exp;
3476
3477 name = input_line_pointer;
3478 delim = get_symbol_end ();
3479 end_name = input_line_pointer;
3480
3481 if (name == end_name)
3482 {
3483 as_bad (_("expected symbol name"));
3484 *end_name = delim;
3485 ignore_rest_of_line ();
3486 return;
3487 }
3488
3489 symbolP = symbol_find_or_make (name);
3490
b54788f8
AO		 3491 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3492 {
89cdfe57 3493 if (!S_IS_VOLATILE (symbolP))
92757bc9
JB		 3494 {
3495 as_bad (_("symbol `%s' is already defined"), name);
3496 *end_name = delim;
3497 ignore_rest_of_line ();
3498 return;
3499 }
89cdfe57 3500 symbolP = symbol_clone (symbolP, 1);
92757bc9 3501 S_CLEAR_VOLATILE (symbolP);
b54788f8
AO		 3502 }
3503
06e77878
AO		 3504 *end_name = delim;
3505
3506 SKIP_WHITESPACE ();
3507
3508 if (*input_line_pointer != ',')
3509 {
3510 *end_name = 0;
3511 as_bad (_("expected comma after \"%s\""), name);
3512 *end_name = delim;
3513 ignore_rest_of_line ();
3514 return;
3515 }
3516
3517 input_line_pointer++;
3518
3519 SKIP_WHITESPACE ();
3520
3521 name = input_line_pointer;
3522 delim = get_symbol_end ();
3523 end_name = input_line_pointer;
3524
3525 if (name == end_name)
3526 {
3527 as_bad (_("expected symbol name"));
3528 ignore_rest_of_line ();
3529 return;
3530 }
3531
3532 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3533 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3534 {
3535 symbolP2 = symbol_find_or_make (name);
3536 S_SET_WEAKREFD (symbolP2);
3537 }
3538 else
3539 {
3540 symbolS *symp = symbolP2;
3541
3542 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3543 {
3544 expressionS *expP = symbol_get_value_expression (symp);
3545
9c2799c2 3546 gas_assert (expP->X_op == O_symbol
06e77878
AO		 3547 && expP->X_add_number == 0);
3548 symp = expP->X_add_symbol;
3549 }
3550 if (symp == symbolP)
3551 {
3552 char *loop;
3553
3554 loop = concat (S_GET_NAME (symbolP),
1bf57e9f 3555 " => ", S_GET_NAME (symbolP2), (const char *) NULL);
06e77878
AO		 3556
3557 symp = symbolP2;
3558 while (symp != symbolP)
3559 {
3560 char *old_loop = loop;
3561 symp = symbol_get_value_expression (symp)->X_add_symbol;
1bf57e9f
AM		 3562 loop = concat (loop, " => ", S_GET_NAME (symp),
3563 (const char *) NULL);
06e77878
AO		 3564 free (old_loop);
3565 }
3566
3567 as_bad (_("%s: would close weakref loop: %s"),
3568 S_GET_NAME (symbolP), loop);
3569
3570 free (loop);
3571
3572 *end_name = delim;
3573 ignore_rest_of_line ();
3574 return;
3575 }
3576
3577 /* Short-circuiting instead of just checking here might speed
3578 things up a tiny little bit, but loop error messages would
3579 miss intermediate links. */
3580 /* symbolP2 = symp; */
3581 }
3582
3583 *end_name = delim;
3584
3585 memset (&exp, 0, sizeof (exp));
3586 exp.X_op = O_symbol;
3587 exp.X_add_symbol = symbolP2;
3588
3589 S_SET_SEGMENT (symbolP, undefined_section);
3590 symbol_set_value_expression (symbolP, &exp);
3591 symbol_set_frag (symbolP, &zero_address_frag);
3592 S_SET_WEAKREFR (symbolP);
3593
3594 demand_empty_rest_of_line ();
3595}
252b5132 3596\f
c95b35a9
NS		 3597
3598/* Verify that we are at the end of a line. If not, issue an error and
3599 skip to EOL. */
3600
041ff4dd 3601void
39e6acbd 3602demand_empty_rest_of_line (void)
252b5132
RH		 3603{
3604 SKIP_WHITESPACE ();
3605 if (is_end_of_line[(unsigned char) *input_line_pointer])
041ff4dd 3606 input_line_pointer++;
252b5132 3607 else
252b5132 3608 {
3882b010 3609 if (ISPRINT (*input_line_pointer))
c95b35a9 3610 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
0e389e77 3611 *input_line_pointer);
252b5132 3612 else
c95b35a9 3613 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
0e389e77 3614 *input_line_pointer);
c95b35a9 3615 ignore_rest_of_line ();
252b5132 3616 }
c95b35a9
NS		 3617
3618 /* Return pointing just after end-of-line. */
3619 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3620}
3621
3622/* Silently advance to the end of line. Use this after already having
3623 issued an error about something bad. */
3624
3625void
3626ignore_rest_of_line (void)
3627{
3628 while (input_line_pointer < buffer_limit
3629 && !is_end_of_line[(unsigned char) *input_line_pointer])
3630 input_line_pointer++;
f0e652b4 3631
041ff4dd
NC		 3632 input_line_pointer++;
3633
3634 /* Return pointing just after end-of-line. */
252b5132
RH		 3635 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3636}
3637
be95a9c1
AM		 3638/* Sets frag for given symbol to zero_address_frag, except when the
3639 symbol frag is already set to a dummy listing frag. */
3640
3641static void
3642set_zero_frag (symbolS *symbolP)
3643{
3644 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3645 symbol_set_frag (symbolP, &zero_address_frag);
3646}
3647
041ff4dd 3648/* In: Pointer to a symbol.
d6415f6c 3649 Input_line_pointer->expression.
f0e652b4 3650
041ff4dd 3651 Out: Input_line_pointer->just after any whitespace after expression.
d6415f6c
AM		 3652 Tried to set symbol to value of expression.
3653 Will change symbols type, value, and frag; */
041ff4dd 3654
252b5132 3655void
39e6acbd 3656pseudo_set (symbolS *symbolP)
252b5132
RH		 3657{
3658 expressionS exp;
be95a9c1 3659 segT seg;
252b5132 3660
041ff4dd 3661 know (symbolP); /* NULL pointer is logic error. */
252b5132 3662
9497f5ac
NC		 3663 if (!S_IS_FORWARD_REF (symbolP))
3664 (void) expression (&exp);
3665 else
3666 (void) deferred_expression (&exp);
252b5132
RH		 3667
3668 if (exp.X_op == O_illegal)
0e389e77 3669 as_bad (_("illegal expression"));
252b5132 3670 else if (exp.X_op == O_absent)
0e389e77 3671 as_bad (_("missing expression"));
252b5132
RH		 3672 else if (exp.X_op == O_big)
3673 {
3674 if (exp.X_add_number > 0)
0e389e77 3675 as_bad (_("bignum invalid"));
252b5132 3676 else
0e389e77 3677 as_bad (_("floating point number invalid"));
252b5132
RH		 3678 }
3679 else if (exp.X_op == O_subtract
9497f5ac 3680 && !S_IS_FORWARD_REF (symbolP)
252b5132 3681 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2b47531b
ILT		 3682 && (symbol_get_frag (exp.X_add_symbol)
3683 == symbol_get_frag (exp.X_op_symbol)))
252b5132
RH		 3684 {
3685 exp.X_op = O_constant;
3686 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3687 - S_GET_VALUE (exp.X_op_symbol));
3688 }
3689
be95a9c1
AM		 3690 if (symbol_section_p (symbolP))
3691 {
3692 as_bad ("attempt to set value of section symbol");
3693 return;
3694 }
be95a9c1 3695
252b5132
RH		 3696 switch (exp.X_op)
3697 {
3698 case O_illegal:
3699 case O_absent:
3700 case O_big:
3701 exp.X_add_number = 0;
3702 /* Fall through. */
3703 case O_constant:
3704 S_SET_SEGMENT (symbolP, absolute_section);
252b5132 3705 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3706 set_zero_frag (symbolP);
252b5132
RH		 3707 break;
3708
3709 case O_register:
97c4f2d9 3710#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
d0548f34
L		 3711 if (S_IS_EXTERNAL (symbolP))
3712 {
3713 as_bad ("can't equate global symbol `%s' with register name",
3714 S_GET_NAME (symbolP));
3715 return;
3716 }
97c4f2d9 3717#endif
252b5132
RH		 3718 S_SET_SEGMENT (symbolP, reg_section);
3719 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
be95a9c1 3720 set_zero_frag (symbolP);
db557034 3721 symbol_get_value_expression (symbolP)->X_op = O_register;
252b5132
RH		 3722 break;
3723
3724 case O_symbol:
be95a9c1
AM		 3725 seg = S_GET_SEGMENT (exp.X_add_symbol);
3726 /* For x=undef+const, create an expression symbol.
3727 For x=x+const, just update x except when x is an undefined symbol
3728 For x=defined+const, evaluate x. */
3729 if (symbolP == exp.X_add_symbol
3730 && (seg != undefined_section
3731 || !symbol_constant_p (symbolP)))
3732 {
3733 *symbol_X_add_number (symbolP) += exp.X_add_number;
3734 break;
3735 }
9497f5ac 3736 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
252b5132
RH		 3737 {
3738 symbolS *s = exp.X_add_symbol;
3739
60938e80
L		 3740 if (S_IS_COMMON (s))
3741 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3742 S_GET_NAME (symbolP), S_GET_NAME (s));
3743
be95a9c1
AM		 3744 S_SET_SEGMENT (symbolP, seg);
3745 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
2b47531b 3746 symbol_set_frag (symbolP, symbol_get_frag (s));
252b5132 3747 copy_symbol_attributes (symbolP, s);
be95a9c1 3748 break;
252b5132 3749 }
66bd02d3
AM		 3750 S_SET_SEGMENT (symbolP, undefined_section);
3751 symbol_set_value_expression (symbolP, &exp);
f08e1e19 3752 copy_symbol_attributes (symbolP, exp.X_add_symbol);
66bd02d3
AM		 3753 set_zero_frag (symbolP);
3754 break;
252b5132
RH		 3755
3756 default:
aba4aa7d
AM		 3757 /* The value is some complex expression. */
3758 S_SET_SEGMENT (symbolP, expr_section);
2b47531b 3759 symbol_set_value_expression (symbolP, &exp);
be95a9c1 3760 set_zero_frag (symbolP);
252b5132
RH		 3761 break;
3762 }
3763}
3764\f
d6415f6c 3765/* cons()
f0e652b4 3766
041ff4dd
NC		 3767 CONStruct more frag of .bytes, or .words etc.
3768 Should need_pass_2 be 1 then emit no frag(s).
3769 This understands EXPRESSIONS.
f0e652b4 3770
041ff4dd 3771 Bug (?)
f0e652b4 3772
041ff4dd
NC		 3773 This has a split personality. We use expression() to read the
3774 value. We can detect if the value won't fit in a byte or word.
3775 But we can't detect if expression() discarded significant digits
3776 in the case of a long. Not worth the crocks required to fix it. */
252b5132
RH		 3777
3778/* Select a parser for cons expressions. */
3779
3780/* Some targets need to parse the expression in various fancy ways.
3781 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3782 (for example, the HPPA does this). Otherwise, you can define
3783 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3784 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3785 are defined, which is the normal case, then only simple expressions
3786 are permitted. */
3787
abd63a32 3788#ifdef TC_M68K
252b5132 3789static void
39e6acbd 3790parse_mri_cons (expressionS *exp, unsigned int nbytes);
abd63a32 3791#endif
252b5132
RH		 3792
3793#ifndef TC_PARSE_CONS_EXPRESSION
3794#ifdef BITFIELD_CONS_EXPRESSIONS
3795#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
041ff4dd 3796static void
39e6acbd 3797parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3798#endif
3799#ifdef REPEAT_CONS_EXPRESSIONS
3800#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3801static void
39e6acbd 3802parse_repeat_cons (expressionS *exp, unsigned int nbytes);
252b5132
RH		 3803#endif
3804
3805/* If we haven't gotten one yet, just call expression. */
3806#ifndef TC_PARSE_CONS_EXPRESSION
3807#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3808#endif
3809#endif
3810
cdfbf930 3811void
b41b1f95
L		 3812do_parse_cons_expression (expressionS *exp,
3813 int nbytes ATTRIBUTE_UNUSED)
cdfbf930
RH		 3814{
3815 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3816}
3817
3818
041ff4dd
NC		 3819/* Worker to do .byte etc statements.
3820 Clobbers input_line_pointer and checks end-of-line. */
3821
3822static void
39e6acbd
KH		 3823cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3824 int rva)
252b5132
RH		 3825{
3826 int c;
3827 expressionS exp;
3828 char *stop = NULL;
fb25138b 3829 char stopc = 0;
252b5132
RH		 3830
3831#ifdef md_flush_pending_output
3832 md_flush_pending_output ();
3833#endif
3834
3835 if (flag_mri)
3836 stop = mri_comment_field (&stopc);
3837
3838 if (is_it_end_of_statement ())
3839 {
3840 demand_empty_rest_of_line ();
3841 if (flag_mri)
3842 mri_comment_end (stop, stopc);
3843 return;
3844 }
3845
cc1bc22a
AM		 3846#ifdef TC_ADDRESS_BYTES
3847 if (nbytes == 0)
3848 nbytes = TC_ADDRESS_BYTES ();
3849#endif
3850
252b5132
RH		 3851#ifdef md_cons_align
3852 md_cons_align (nbytes);
3853#endif
3854
3855 c = 0;
3856 do
3857 {
abd63a32 3858#ifdef TC_M68K
252b5132
RH		 3859 if (flag_m68k_mri)
3860 parse_mri_cons (&exp, (unsigned int) nbytes);
3861 else
abd63a32 3862#endif
252b5132
RH		 3863 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3864
3865 if (rva)
3866 {
3867 if (exp.X_op == O_symbol)
3868 exp.X_op = O_symbol_rva;
3869 else
3870 as_fatal (_("rva without symbol"));
3871 }
3872 emit_expr (&exp, (unsigned int) nbytes);
3873 ++c;
3874 }
3875 while (*input_line_pointer++ == ',');
3876
3877 /* In MRI mode, after an odd number of bytes, we must align to an
3878 even word boundary, unless the next instruction is a dc.b, ds.b
3879 or dcb.b. */
3880 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3881 mri_pending_align = 1;
3882
041ff4dd 3883 input_line_pointer--; /* Put terminator back into stream. */
252b5132
RH		 3884
3885 demand_empty_rest_of_line ();
3886
3887 if (flag_mri)
3888 mri_comment_end (stop, stopc);
3889}
3890
252b5132 3891void
39e6acbd 3892cons (int size)
252b5132
RH		 3893{
3894 cons_worker (size, 0);
3895}
3896
041ff4dd 3897void
39e6acbd 3898s_rva (int size)
252b5132
RH		 3899{
3900 cons_worker (size, 1);
3901}
3902
05e9452c
AM		 3903/* .reloc offset, reloc_name, symbol+addend. */
3904
3905void
3906s_reloc (int ignore ATTRIBUTE_UNUSED)
3907{
3908 char *stop = NULL;
3909 char stopc = 0;
3910 expressionS exp;
3911 char *r_name;
3912 int c;
3913 struct reloc_list *reloc;
3914
1e9cc1c2 3915 reloc = (struct reloc_list *) xmalloc (sizeof (*reloc));
05e9452c
AM		 3916
3917 if (flag_mri)
3918 stop = mri_comment_field (&stopc);
3919
3920 expression (&exp);
3921 switch (exp.X_op)
3922 {
3923 case O_illegal:
3924 case O_absent:
3925 case O_big:
3926 case O_register:
3927 as_bad (_("missing or bad offset expression"));
3928 goto err_out;
3929 case O_constant:
3930 exp.X_add_symbol = section_symbol (now_seg);
3931 exp.X_op = O_symbol;
3932 /* Fall thru */
3933 case O_symbol:
3934 if (exp.X_add_number == 0)
3935 {
3936 reloc->u.a.offset_sym = exp.X_add_symbol;
3937 break;
3938 }
3939 /* Fall thru */
3940 default:
3941 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3942 break;
3943 }
3944
3945 SKIP_WHITESPACE ();
3946 if (*input_line_pointer != ',')
3947 {
3948 as_bad (_("missing reloc type"));
3949 goto err_out;
3950 }
3951
3952 ++input_line_pointer;
3953 SKIP_WHITESPACE ();
3954 r_name = input_line_pointer;
3955 c = get_symbol_end ();
3956 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3957 *input_line_pointer = c;
3958 if (reloc->u.a.howto == NULL)
3959 {
3960 as_bad (_("unrecognized reloc type"));
3961 goto err_out;
3962 }
3963
3964 exp.X_op = O_absent;
3965 SKIP_WHITESPACE ();
3966 if (*input_line_pointer == ',')
3967 {
3968 ++input_line_pointer;
c188d0bb 3969 expression (&exp);
05e9452c
AM		 3970 }
3971 switch (exp.X_op)
3972 {
3973 case O_illegal:
3974 case O_big:
3975 case O_register:
3976 as_bad (_("bad reloc expression"));
3977 err_out:
3978 ignore_rest_of_line ();
3979 free (reloc);
3980 if (flag_mri)
3981 mri_comment_end (stop, stopc);
3982 return;
3983 case O_absent:
3984 reloc->u.a.sym = NULL;
3985 reloc->u.a.addend = 0;
3986 break;
3987 case O_constant:
3988 reloc->u.a.sym = NULL;
3989 reloc->u.a.addend = exp.X_add_number;
3990 break;
3991 case O_symbol:
3992 reloc->u.a.sym = exp.X_add_symbol;
3993 reloc->u.a.addend = exp.X_add_number;
3994 break;
3995 default:
3996 reloc->u.a.sym = make_expr_symbol (&exp);
3997 reloc->u.a.addend = 0;
3998 break;
3999 }
4000
4001 as_where (&reloc->file, &reloc->line);
4002 reloc->next = reloc_list;
4003 reloc_list = reloc;
4004
4005 demand_empty_rest_of_line ();
4006 if (flag_mri)
4007 mri_comment_end (stop, stopc);
4008}
4009
252b5132
RH		 4010/* Put the contents of expression EXP into the object file using
4011 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4012
4013void
39e6acbd 4014emit_expr (expressionS *exp, unsigned int nbytes)
252b5132
RH		 4015{
4016 operatorT op;
4017 register char *p;
4018 valueT extra_digit = 0;
4019
4020 /* Don't do anything if we are going to make another pass. */
4021 if (need_pass_2)
4022 return;
4023
4bc25101
NC		 4024 /* Grow the current frag now so that dot_value does not get invalidated
4025 if the frag were to fill up in the frag_more() call below. */
4026 frag_grow (nbytes);
ed7d5d1a
AM		 4027 dot_value = frag_now_fix ();
4028
252b5132
RH		 4029#ifndef NO_LISTING
4030#ifdef OBJ_ELF
4031 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4032 appear as a four byte positive constant in the .line section,
4033 followed by a 2 byte 0xffff. Look for that case here. */
4034 {
4035 static int dwarf_line = -1;
4036
4037 if (strcmp (segment_name (now_seg), ".line") != 0)
4038 dwarf_line = -1;
4039 else if (dwarf_line >= 0
4040 && nbytes == 2
4041 && exp->X_op == O_constant
4042 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
4043 listing_source_line ((unsigned int) dwarf_line);
4044 else if (nbytes == 4
4045 && exp->X_op == O_constant
4046 && exp->X_add_number >= 0)
4047 dwarf_line = exp->X_add_number;
4048 else
4049 dwarf_line = -1;
4050 }
4051
4052 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4053 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4054 AT_sibling (0x12) followed by a four byte address of the sibling
4055 followed by a 2 byte AT_name (0x38) followed by the name of the
4056 file. We look for that case here. */
4057 {
4058 static int dwarf_file = 0;
4059
4060 if (strcmp (segment_name (now_seg), ".debug") != 0)
4061 dwarf_file = 0;
4062 else if (dwarf_file == 0
4063 && nbytes == 2
4064 && exp->X_op == O_constant
4065 && exp->X_add_number == 0x11)
4066 dwarf_file = 1;
4067 else if (dwarf_file == 1
4068 && nbytes == 2
4069 && exp->X_op == O_constant
4070 && exp->X_add_number == 0x12)
4071 dwarf_file = 2;
4072 else if (dwarf_file == 2
4073 && nbytes == 4)
4074 dwarf_file = 3;
4075 else if (dwarf_file == 3
4076 && nbytes == 2
4077 && exp->X_op == O_constant
4078 && exp->X_add_number == 0x38)
4079 dwarf_file = 4;
4080 else
4081 dwarf_file = 0;
4082
4083 /* The variable dwarf_file_string tells stringer that the string
4084 may be the name of the source file. */
4085 if (dwarf_file == 4)
4086 dwarf_file_string = 1;
4087 else
4088 dwarf_file_string = 0;
4089 }
4090#endif
4091#endif
4092
4093 if (check_eh_frame (exp, &nbytes))
4094 return;
4095
4096 op = exp->X_op;
4097
4098 /* Allow `.word 0' in the absolute section. */
4099 if (now_seg == absolute_section)
4100 {
4101 if (op != O_constant || exp->X_add_number != 0)
4102 as_bad (_("attempt to store value in absolute section"));
4103 abs_section_offset += nbytes;
4104 return;
4105 }
4106
4107 /* Handle a negative bignum. */
4108 if (op == O_uminus
4109 && exp->X_add_number == 0
2b47531b
ILT		 4110 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
4111 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
252b5132
RH		 4112 {
4113 int i;
4114 unsigned long carry;
4115
2b47531b 4116 exp = symbol_get_value_expression (exp->X_add_symbol);
252b5132
RH		 4117
4118 /* Negate the bignum: one's complement each digit and add 1. */
4119 carry = 1;
4120 for (i = 0; i < exp->X_add_number; i++)
4121 {
4122 unsigned long next;
4123
041ff4dd 4124 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
252b5132
RH		 4125 & LITTLENUM_MASK)
4126 + carry);
4127 generic_bignum[i] = next & LITTLENUM_MASK;
4128 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4129 }
4130
4131 /* We can ignore any carry out, because it will be handled by
4132 extra_digit if it is needed. */
4133
4134 extra_digit = (valueT) -1;
4135 op = O_big;
4136 }
4137
4138 if (op == O_absent || op == O_illegal)
4139 {
4140 as_warn (_("zero assumed for missing expression"));
4141 exp->X_add_number = 0;
4142 op = O_constant;
4143 }
4144 else if (op == O_big && exp->X_add_number <= 0)
4145 {
0e389e77 4146 as_bad (_("floating point number invalid"));
252b5132
RH		 4147 exp->X_add_number = 0;
4148 op = O_constant;
4149 }
4150 else if (op == O_register)
4151 {
4152 as_warn (_("register value used as expression"));
4153 op = O_constant;
4154 }
4155
4156 p = frag_more ((int) nbytes);
4157
4158#ifndef WORKING_DOT_WORD
4159 /* If we have the difference of two symbols in a word, save it on
4160 the broken_words list. See the code in write.c. */
4161 if (op == O_subtract && nbytes == 2)
4162 {
4163 struct broken_word *x;
4164
4165 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
4166 x->next_broken_word = broken_words;
4167 broken_words = x;
4168 x->seg = now_seg;
4169 x->subseg = now_subseg;
4170 x->frag = frag_now;
4171 x->word_goes_here = p;
4172 x->dispfrag = 0;
4173 x->add = exp->X_add_symbol;
4174 x->sub = exp->X_op_symbol;
4175 x->addnum = exp->X_add_number;
4176 x->added = 0;
dc59a897 4177 x->use_jump = 0;
252b5132
RH		 4178 new_broken_words++;
4179 return;
4180 }
4181#endif
4182
4183 /* If we have an integer, but the number of bytes is too large to
4184 pass to md_number_to_chars, handle it as a bignum. */
4185 if (op == O_constant && nbytes > sizeof (valueT))
4186 {
e5604d79
RS		 4187 extra_digit = exp->X_unsigned ? 0 : -1;
4188 convert_to_bignum (exp);
4189 op = O_big;
252b5132
RH		 4190 }
4191
4192 if (op == O_constant)
4193 {
4194 register valueT get;
4195 register valueT use;
4196 register valueT mask;
4197 valueT hibit;
4198 register valueT unmask;
4199
4200 /* JF << of >= number of bits in the object is undefined. In
041ff4dd 4201 particular SPARC (Sun 4) has problems. */
252b5132
RH		 4202 if (nbytes >= sizeof (valueT))
4203 {
4204 mask = 0;
4205 if (nbytes > sizeof (valueT))
4206 hibit = 0;
4207 else
4208 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4209 }
4210 else
4211 {
041ff4dd 4212 /* Don't store these bits. */
252b5132
RH		 4213 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4214 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4215 }
4216
041ff4dd 4217 unmask = ~mask; /* Do store these bits. */
252b5132
RH		 4218
4219#ifdef NEVER
4220 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
041ff4dd 4221 mask = ~(unmask >> 1); /* Includes sign bit now. */
252b5132
RH		 4222#endif
4223
4224 get = exp->X_add_number;
4225 use = get & unmask;
4226 if ((get & mask) != 0
4227 && ((get & mask) != mask
4228 || (get & hibit) == 0))
041ff4dd 4229 { /* Leading bits contain both 0s & 1s. */
b6ac5419 4230#if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
6e3d6dc1 4231#ifndef __MSVCRT__
5c612369
NC		 4232 as_warn (_("value 0x%llx truncated to 0x%llx"),
4233 (unsigned long long) get, (unsigned long long) use);
6e3d6dc1
NC		 4234#else
4235 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4236 (unsigned long long) get, (unsigned long long) use);
4237#endif
b6ac5419
AM		 4238#else
4239 as_warn (_("value 0x%lx truncated to 0x%lx"),
4240 (unsigned long) get, (unsigned long) use);
4241#endif
252b5132 4242 }
041ff4dd 4243 /* Put bytes in right order. */
252b5132
RH		 4244 md_number_to_chars (p, use, (int) nbytes);
4245 }
4246 else if (op == O_big)
4247 {
4248 unsigned int size;
4249 LITTLENUM_TYPE *nums;
4250
4251 know (nbytes % CHARS_PER_LITTLENUM == 0);
4252
4253 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4254 if (nbytes < size)
4255 {
0e389e77 4256 as_warn (_("bignum truncated to %d bytes"), nbytes);
252b5132
RH		 4257 size = nbytes;
4258 }
4259
4260 if (target_big_endian)
4261 {
4262 while (nbytes > size)
4263 {
4264 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4265 nbytes -= CHARS_PER_LITTLENUM;
4266 p += CHARS_PER_LITTLENUM;
4267 }
4268
4269 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
ceac3f62 4270 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 4271 {
4272 --nums;
4273 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4274 size -= CHARS_PER_LITTLENUM;
4275 p += CHARS_PER_LITTLENUM;
4276 }
4277 }
4278 else
4279 {
4280 nums = generic_bignum;
ceac3f62 4281 while (size >= CHARS_PER_LITTLENUM)
252b5132
RH		 4282 {
4283 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4284 ++nums;
4285 size -= CHARS_PER_LITTLENUM;
4286 p += CHARS_PER_LITTLENUM;
4287 nbytes -= CHARS_PER_LITTLENUM;
4288 }
4289
ceac3f62 4290 while (nbytes >= CHARS_PER_LITTLENUM)
252b5132
RH		 4291 {
4292 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4293 nbytes -= CHARS_PER_LITTLENUM;
4294 p += CHARS_PER_LITTLENUM;
4295 }
4296 }
4297 }
4298 else
7ddd14de
BW		 4299 emit_expr_fix (exp, nbytes, frag_now, p);
4300}
4301
4302void
4303emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
4304{
4305 memset (p, 0, nbytes);
252b5132 4306
7ddd14de 4307 /* Generate a fixS to record the symbol value. */
252b5132 4308
252b5132 4309#ifdef TC_CONS_FIX_NEW
7ddd14de 4310 TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
252b5132 4311#else
7ddd14de
BW		 4312 {
4313 bfd_reloc_code_real_type r;
252b5132 4314
7ddd14de
BW		 4315 switch (nbytes)
4316 {
4317 case 1:
4318 r = BFD_RELOC_8;
4319 break;
4320 case 2:
4321 r = BFD_RELOC_16;
4322 break;
d4f4f3fb
AM		 4323 case 3:
4324 r = BFD_RELOC_24;
4325 break;
7ddd14de
BW		 4326 case 4:
4327 r = BFD_RELOC_32;
4328 break;
4329 case 8:
4330 r = BFD_RELOC_64;
4331 break;
4332 default:
4333 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4334 r = BFD_RELOC_32;
4335 break;
252b5132 4336 }
7ddd14de
BW		 4337 fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
4338 0, r);
4339 }
252b5132 4340#endif
252b5132
RH		 4341}
4342\f
4343#ifdef BITFIELD_CONS_EXPRESSIONS
4344
4345/* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4346 w:x,y:z, where w and y are bitwidths and x and y are values. They
4347 then pack them all together. We do a little better in that we allow
4348 them in words, longs, etc. and we'll pack them in target byte order
4349 for you.
4350
47eebc20 4351 The rules are: pack least significant bit first, if a field doesn't
252b5132
RH		 4352 entirely fit, put it in the next unit. Overflowing the bitfield is
4353 explicitly *not* even a warning. The bitwidth should be considered
4354 a "mask".
4355
4356 To use this function the tc-XXX.h file should define
4357 BITFIELD_CONS_EXPRESSIONS. */
4358
041ff4dd 4359static void
252b5132
RH		 4360parse_bitfield_cons (exp, nbytes)
4361 expressionS *exp;
4362 unsigned int nbytes;
4363{
4364 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4365 char *hold = input_line_pointer;
4366
4367 (void) expression (exp);
4368
4369 if (*input_line_pointer == ':')
041ff4dd
NC		 4370 {
4371 /* Bitfields. */
252b5132
RH		 4372 long value = 0;
4373
4374 for (;;)
4375 {
4376 unsigned long width;
4377
4378 if (*input_line_pointer != ':')
4379 {
4380 input_line_pointer = hold;
4381 break;
041ff4dd 4382 } /* Next piece is not a bitfield. */
252b5132
RH		 4383
4384 /* In the general case, we can't allow
4385 full expressions with symbol
4386 differences and such. The relocation
4387 entries for symbols not defined in this
4388 assembly would require arbitrary field
4389 widths, positions, and masks which most
4390 of our current object formats don't
4391 support.
4392
4393 In the specific case where a symbol
4394 *is* defined in this assembly, we
4395 *could* build fixups and track it, but
4396 this could lead to confusion for the
4397 backends. I'm lazy. I'll take any
4398 SEG_ABSOLUTE. I think that means that
4399 you can use a previous .set or
041ff4dd 4400 .equ type symbol. xoxorich. */
252b5132
RH		 4401
4402 if (exp->X_op == O_absent)
4403 {
4404 as_warn (_("using a bit field width of zero"));
4405 exp->X_add_number = 0;
4406 exp->X_op = O_constant;
041ff4dd 4407 } /* Implied zero width bitfield. */
252b5132
RH		 4408
4409 if (exp->X_op != O_constant)
4410 {
4411 *input_line_pointer = '\0';
4412 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4413 *input_line_pointer = ':';
4414 demand_empty_rest_of_line ();
4415 return;
041ff4dd 4416 } /* Too complex. */
252b5132
RH		 4417
4418 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4419 {
4420 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4421 width, nbytes, (BITS_PER_CHAR * nbytes));
4422 width = BITS_PER_CHAR * nbytes;
041ff4dd 4423 } /* Too big. */
252b5132
RH		 4424
4425 if (width > bits_available)
4426 {
4427 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4428 input_line_pointer = hold;
4429 exp->X_add_number = value;
4430 break;
041ff4dd 4431 } /* Won't fit. */
252b5132 4432
ef99799a
KH		 4433 /* Skip ':'. */
4434 hold = ++input_line_pointer;
252b5132
RH		 4435
4436 (void) expression (exp);
4437 if (exp->X_op != O_constant)
4438 {
4439 char cache = *input_line_pointer;
4440
4441 *input_line_pointer = '\0';
4442 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4443 *input_line_pointer = cache;
4444 demand_empty_rest_of_line ();
4445 return;
041ff4dd 4446 } /* Too complex. */
252b5132
RH		 4447
4448 value |= ((~(-1 << width) & exp->X_add_number)
4449 << ((BITS_PER_CHAR * nbytes) - bits_available));
4450
4451 if ((bits_available -= width) == 0
4452 || is_it_end_of_statement ()
4453 || *input_line_pointer != ',')
4454 {
4455 break;
041ff4dd 4456 } /* All the bitfields we're gonna get. */
252b5132
RH		 4457
4458 hold = ++input_line_pointer;
4459 (void) expression (exp);
041ff4dd 4460 }
252b5132
RH		 4461
4462 exp->X_add_number = value;
4463 exp->X_op = O_constant;
4464 exp->X_unsigned = 1;
041ff4dd
NC		 4465 }
4466}
252b5132
RH		 4467
4468#endif /* BITFIELD_CONS_EXPRESSIONS */
4469\f
4470/* Handle an MRI style string expression. */
4471
abd63a32 4472#ifdef TC_M68K
252b5132
RH		 4473static void
4474parse_mri_cons (exp, nbytes)
4475 expressionS *exp;
4476 unsigned int nbytes;
4477{
4478 if (*input_line_pointer != '\''
4479 && (input_line_pointer[1] != '\''
4480 || (*input_line_pointer != 'A'
4481 && *input_line_pointer != 'E')))
4482 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4483 else
4484 {
4485 unsigned int scan;
4486 unsigned int result = 0;
4487
4488 /* An MRI style string. Cut into as many bytes as will fit into
4489 a nbyte chunk, left justify if necessary, and separate with
4490 commas so we can try again later. */
4491 if (*input_line_pointer == 'A')
4492 ++input_line_pointer;
4493 else if (*input_line_pointer == 'E')
4494 {
4495 as_bad (_("EBCDIC constants are not supported"));
4496 ++input_line_pointer;
4497 }
4498
4499 input_line_pointer++;
4500 for (scan = 0; scan < nbytes; scan++)
4501 {
4502 if (*input_line_pointer == '\'')
4503 {
4504 if (input_line_pointer[1] == '\'')
4505 {
4506 input_line_pointer++;
4507 }
4508 else
4509 break;
4510 }
4511 result = (result << 8) | (*input_line_pointer++);
4512 }
4513
041ff4dd 4514 /* Left justify. */
252b5132
RH		 4515 while (scan < nbytes)
4516 {
4517 result <<= 8;
4518 scan++;
4519 }
f0e652b4 4520
041ff4dd 4521 /* Create correct expression. */
252b5132
RH		 4522 exp->X_op = O_constant;
4523 exp->X_add_number = result;
f0e652b4 4524
041ff4dd 4525 /* Fake it so that we can read the next char too. */
252b5132
RH		 4526 if (input_line_pointer[0] != '\'' ||
4527 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4528 {
4529 input_line_pointer -= 2;
4530 input_line_pointer[0] = ',';
4531 input_line_pointer[1] = '\'';
4532 }
4533 else
4534 input_line_pointer++;
4535 }
4536}
abd63a32 4537#endif /* TC_M68K */
252b5132
RH		 4538\f
4539#ifdef REPEAT_CONS_EXPRESSIONS
4540
4541/* Parse a repeat expression for cons. This is used by the MIPS
4542 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4543 object file COUNT times.
4544
4545 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4546
4547static void
4548parse_repeat_cons (exp, nbytes)
4549 expressionS *exp;
4550 unsigned int nbytes;
4551{
4552 expressionS count;
4553 register int i;
4554
4555 expression (exp);
4556
4557 if (*input_line_pointer != ':')
4558 {
4559 /* No repeat count. */
4560 return;
4561 }
4562
4563 ++input_line_pointer;
4564 expression (&count);
4565 if (count.X_op != O_constant
4566 || count.X_add_number <= 0)
4567 {
0e389e77 4568 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 4569 return;
4570 }
4571
4572 /* The cons function is going to output this expression once. So we
4573 output it count - 1 times. */
4574 for (i = count.X_add_number - 1; i > 0; i--)
4575 emit_expr (exp, nbytes);
4576}
4577
4578#endif /* REPEAT_CONS_EXPRESSIONS */
4579\f
4580/* Parse a floating point number represented as a hex constant. This
4581 permits users to specify the exact bits they want in the floating
4582 point number. */
4583
4584static int
39e6acbd 4585hex_float (int float_type, char *bytes)
252b5132
RH		 4586{
4587 int length;
4588 int i;
4589
4590 switch (float_type)
4591 {
4592 case 'f':
4593 case 'F':
4594 case 's':
4595 case 'S':
4596 length = 4;
4597 break;
4598
4599 case 'd':
4600 case 'D':
4601 case 'r':
4602 case 'R':
4603 length = 8;
4604 break;
4605
4606 case 'x':
4607 case 'X':
4608 length = 12;
4609 break;
4610
4611 case 'p':
4612 case 'P':
4613 length = 12;
4614 break;
4615
4616 default:
0e389e77 4617 as_bad (_("unknown floating type type '%c'"), float_type);
252b5132
RH		 4618 return -1;
4619 }
4620
4621 /* It would be nice if we could go through expression to parse the
4622 hex constant, but if we get a bignum it's a pain to sort it into
4623 the buffer correctly. */
4624 i = 0;
4625 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4626 {
4627 int d;
4628
4629 /* The MRI assembler accepts arbitrary underscores strewn about
041ff4dd 4630 through the hex constant, so we ignore them as well. */
252b5132
RH		 4631 if (*input_line_pointer == '_')
4632 {
4633 ++input_line_pointer;
4634 continue;
4635 }
4636
4637 if (i >= length)
4638 {
0e389e77 4639 as_warn (_("floating point constant too large"));
252b5132
RH		 4640 return -1;
4641 }
4642 d = hex_value (*input_line_pointer) << 4;
4643 ++input_line_pointer;
4644 while (*input_line_pointer == '_')
4645 ++input_line_pointer;
4646 if (hex_p (*input_line_pointer))
4647 {
4648 d += hex_value (*input_line_pointer);
4649 ++input_line_pointer;
4650 }
4651 if (target_big_endian)
4652 bytes[i] = d;
4653 else
4654 bytes[length - i - 1] = d;
4655 ++i;
4656 }
4657
4658 if (i < length)
4659 {
4660 if (target_big_endian)
4661 memset (bytes + i, 0, length - i);
4662 else
4663 memset (bytes, 0, length - i);
4664 }
4665
4666 return length;
4667}
4668
d6415f6c 4669/* float_cons()
f0e652b4 4670
041ff4dd
NC		 4671 CONStruct some more frag chars of .floats .ffloats etc.
4672 Makes 0 or more new frags.
4673 If need_pass_2 == 1, no frags are emitted.
4674 This understands only floating literals, not expressions. Sorry.
f0e652b4 4675
041ff4dd
NC		 4676 A floating constant is defined by atof_generic(), except it is preceded
4677 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4678 reading, I decided to be incompatible. This always tries to give you
4679 rounded bits to the precision of the pseudo-op. Former AS did premature
47eebc20 4680 truncation, restored noisy bits instead of trailing 0s AND gave you
041ff4dd
NC		 4681 a choice of 2 flavours of noise according to which of 2 floating-point
4682 scanners you directed AS to use.
f0e652b4 4683
041ff4dd 4684 In: input_line_pointer->whitespace before, or '0' of flonum. */
252b5132
RH		 4685
4686void
39e6acbd
KH		 4687float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4688 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
252b5132
RH		 4689{
4690 register char *p;
041ff4dd
NC		 4691 int length; /* Number of chars in an object. */
4692 register char *err; /* Error from scanning floating literal. */
252b5132
RH		 4693 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4694
4695 if (is_it_end_of_statement ())
4696 {
4697 demand_empty_rest_of_line ();
4698 return;
4699 }
4700
4701#ifdef md_flush_pending_output
4702 md_flush_pending_output ();
4703#endif
4704
cc3f603a
JM		 4705#ifdef md_cons_align
4706 md_cons_align (1);
4707#endif
4708
252b5132
RH		 4709 do
4710 {
041ff4dd 4711 /* input_line_pointer->1st char of a flonum (we hope!). */
252b5132
RH		 4712 SKIP_WHITESPACE ();
4713
4714 /* Skip any 0{letter} that may be present. Don't even check if the
d6415f6c
AM		 4715 letter is legal. Someone may invent a "z" format and this routine
4716 has no use for such information. Lusers beware: you get
4717 diagnostics if your input is ill-conditioned. */
252b5132 4718 if (input_line_pointer[0] == '0'
3882b010 4719 && ISALPHA (input_line_pointer[1]))
252b5132
RH		 4720 input_line_pointer += 2;
4721
4722 /* Accept :xxxx, where the x's are hex digits, for a floating
d6415f6c 4723 point with the exact digits specified. */
252b5132
RH		 4724 if (input_line_pointer[0] == ':')
4725 {
4726 ++input_line_pointer;
4727 length = hex_float (float_type, temp);
4728 if (length < 0)
4729 {
4730 ignore_rest_of_line ();
4731 return;
4732 }
4733 }
4734 else
4735 {
4736 err = md_atof (float_type, temp, &length);
4737 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
499ac353 4738 know (err != NULL || length > 0);
252b5132
RH		 4739 if (err)
4740 {
0e389e77 4741 as_bad (_("bad floating literal: %s"), err);
252b5132
RH		 4742 ignore_rest_of_line ();
4743 return;
4744 }
4745 }
4746
4747 if (!need_pass_2)
4748 {
4749 int count;
4750
4751 count = 1;
4752
4753#ifdef REPEAT_CONS_EXPRESSIONS
4754 if (*input_line_pointer == ':')
4755 {
4756 expressionS count_exp;
4757
4758 ++input_line_pointer;
4759 expression (&count_exp);
f0e652b4 4760
252b5132
RH		 4761 if (count_exp.X_op != O_constant
4762 || count_exp.X_add_number <= 0)
041ff4dd 4763 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
252b5132
RH		 4764 else
4765 count = count_exp.X_add_number;
4766 }
4767#endif
4768
4769 while (--count >= 0)
4770 {
4771 p = frag_more (length);
4772 memcpy (p, temp, (unsigned int) length);
4773 }
4774 }
4775 SKIP_WHITESPACE ();
4776 }
4777 while (*input_line_pointer++ == ',');
4778
041ff4dd
NC		 4779 /* Put terminator back into stream. */
4780 --input_line_pointer;
252b5132 4781 demand_empty_rest_of_line ();
041ff4dd 4782}
252b5132 4783\f
041ff4dd 4784/* Return the size of a LEB128 value. */
252b5132
RH		 4785
4786static inline int
39e6acbd 4787sizeof_sleb128 (offsetT value)
252b5132
RH		 4788{
4789 register int size = 0;
4790 register unsigned byte;
4791
4792 do
4793 {
4794 byte = (value & 0x7f);
4795 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4796 Fortunately, we can structure things so that the extra work reduces
4797 to a noop on systems that do things "properly". */
4798 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4799 size += 1;
4800 }
4801 while (!(((value == 0) && ((byte & 0x40) == 0))
4802 || ((value == -1) && ((byte & 0x40) != 0))));
4803
4804 return size;
4805}
4806
4807static inline int
39e6acbd 4808sizeof_uleb128 (valueT value)
252b5132
RH		 4809{
4810 register int size = 0;
4811 register unsigned byte;
4812
4813 do
4814 {
4815 byte = (value & 0x7f);
4816 value >>= 7;
4817 size += 1;
4818 }
4819 while (value != 0);
4820
4821 return size;
4822}
4823
4824int
39e6acbd 4825sizeof_leb128 (valueT value, int sign)
252b5132
RH		 4826{
4827 if (sign)
4828 return sizeof_sleb128 ((offsetT) value);
4829 else
4830 return sizeof_uleb128 (value);
4831}
4832
4833/* Output a LEB128 value. */
4834
4835static inline int
39e6acbd 4836output_sleb128 (char *p, offsetT value)
252b5132
RH		 4837{
4838 register char *orig = p;
4839 register int more;
4840
4841 do
4842 {
4843 unsigned byte = (value & 0x7f);
4844
4845 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4846 Fortunately, we can structure things so that the extra work reduces
4847 to a noop on systems that do things "properly". */
4848 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4849
4850 more = !((((value == 0) && ((byte & 0x40) == 0))
4851 || ((value == -1) && ((byte & 0x40) != 0))));
4852 if (more)
4853 byte |= 0x80;
4854
4855 *p++ = byte;
4856 }
4857 while (more);
4858
4859 return p - orig;
4860}
4861
4862static inline int
39e6acbd 4863output_uleb128 (char *p, valueT value)
252b5132
RH		 4864{
4865 char *orig = p;
4866
4867 do
4868 {
4869 unsigned byte = (value & 0x7f);
4870 value >>= 7;
4871 if (value != 0)
4872 /* More bytes to follow. */
4873 byte |= 0x80;
4874
4875 *p++ = byte;
4876 }
4877 while (value != 0);
4878
4879 return p - orig;
4880}
4881
4882int
39e6acbd 4883output_leb128 (char *p, valueT value, int sign)
252b5132
RH		 4884{
4885 if (sign)
4886 return output_sleb128 (p, (offsetT) value);
4887 else
4888 return output_uleb128 (p, value);
4889}
4890
4891/* Do the same for bignums. We combine sizeof with output here in that
4892 we don't output for NULL values of P. It isn't really as critical as
4893 for "normal" values that this be streamlined. */
4894
6d4d30bb 4895static inline int
39e6acbd 4896output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4897{
4898 char *orig = p;
4899 valueT val = 0;
4900 int loaded = 0;
4901 unsigned byte;
4902
4903 /* Strip leading sign extensions off the bignum. */
e5604d79
RS		 4904 while (size > 1
4905 && bignum[size - 1] == LITTLENUM_MASK
4906 && bignum[size - 2] > LITTLENUM_MASK / 2)
252b5132
RH		 4907 size--;
4908
4909 do
4910 {
e5604d79
RS		 4911 /* OR in the next part of the littlenum. */
4912 val |= (*bignum << loaded);
4913 loaded += LITTLENUM_NUMBER_OF_BITS;
4914 size--;
4915 bignum++;
4916
4917 /* Add bytes until there are less than 7 bits left in VAL
4918 or until every non-sign bit has been written. */
4919 do
252b5132 4920 {
e5604d79
RS		 4921 byte = val & 0x7f;
4922 loaded -= 7;
4923 val >>= 7;
4924 if (size > 0
4925 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
252b5132 4926 byte |= 0x80;
e5604d79
RS		 4927
4928 if (orig)
4929 *p = byte;
4930 p++;
252b5132 4931 }
e5604d79
RS		 4932 while ((byte & 0x80) != 0 && loaded >= 7);
4933 }
4934 while (size > 0);
252b5132 4935
e5604d79
RS		 4936 /* Mop up any left-over bits (of which there will be less than 7). */
4937 if ((byte & 0x80) != 0)
4938 {
4939 /* Sign-extend VAL. */
4940 if (val & (1 << (loaded - 1)))
4941 val |= ~0 << loaded;
252b5132 4942 if (orig)
e5604d79 4943 *p = val & 0x7f;
252b5132
RH		 4944 p++;
4945 }
252b5132
RH		 4946
4947 return p - orig;
4948}
4949
6d4d30bb 4950static inline int
39e6acbd 4951output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
252b5132
RH		 4952{
4953 char *orig = p;
4954 valueT val = 0;
4955 int loaded = 0;
4956 unsigned byte;
4957
4958 /* Strip leading zeros off the bignum. */
4959 /* XXX: Is this needed? */
041ff4dd 4960 while (size > 0 && bignum[size - 1] == 0)
252b5132
RH		 4961 size--;
4962
4963 do
4964 {
4965 if (loaded < 7 && size > 0)
4966 {
4967 val |= (*bignum << loaded);
4968 loaded += 8 * CHARS_PER_LITTLENUM;
4969 size--;
4970 bignum++;
4971 }
4972
4973 byte = val & 0x7f;
4974 loaded -= 7;
4975 val >>= 7;
4976
4977 if (size > 0 || val)
4978 byte |= 0x80;
4979
4980 if (orig)
4981 *p = byte;
4982 p++;
4983 }
4984 while (byte & 0x80);
4985
4986 return p - orig;
4987}
4988
6d4d30bb 4989static int
39e6acbd 4990output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
252b5132
RH		 4991{
4992 if (sign)
4993 return output_big_sleb128 (p, bignum, size);
4994 else
4995 return output_big_uleb128 (p, bignum, size);
4996}
4997
4998/* Generate the appropriate fragments for a given expression to emit a
4999 leb128 value. */
5000
87c245cc 5001static void
39e6acbd 5002emit_leb128_expr (expressionS *exp, int sign)
252b5132
RH		 5003{
5004 operatorT op = exp->X_op;
b7712f8d 5005 unsigned int nbytes;
252b5132
RH		 5006
5007 if (op == O_absent || op == O_illegal)
5008 {
5009 as_warn (_("zero assumed for missing expression"));
5010 exp->X_add_number = 0;
5011 op = O_constant;
5012 }
5013 else if (op == O_big && exp->X_add_number <= 0)
5014 {
0e389e77 5015 as_bad (_("floating point number invalid"));
252b5132
RH		 5016 exp->X_add_number = 0;
5017 op = O_constant;
5018 }
5019 else if (op == O_register)
5020 {
5021 as_warn (_("register value used as expression"));
5022 op = O_constant;
5023 }
e5604d79
RS		 5024 else if (op == O_constant
5025 && sign
5026 && (exp->X_add_number < 0) != !exp->X_unsigned)
5027 {
5028 /* We're outputting a signed leb128 and the sign of X_add_number
5029 doesn't reflect the sign of the original value. Convert EXP
5030 to a correctly-extended bignum instead. */
5031 convert_to_bignum (exp);
5032 op = O_big;
5033 }
252b5132 5034
67a659f6
RH		 5035 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5036 a signal that this is leb128 data. It shouldn't optimize this away. */
b7712f8d 5037 nbytes = (unsigned int) -1;
67a659f6
RH		 5038 if (check_eh_frame (exp, &nbytes))
5039 abort ();
5040
371b7465
RH		 5041 /* Let the backend know that subsequent data may be byte aligned. */
5042#ifdef md_cons_align
5043 md_cons_align (1);
5044#endif
5045
252b5132
RH		 5046 if (op == O_constant)
5047 {
5048 /* If we've got a constant, emit the thing directly right now. */
5049
5050 valueT value = exp->X_add_number;
5051 int size;
5052 char *p;
5053
5054 size = sizeof_leb128 (value, sign);
5055 p = frag_more (size);
5056 output_leb128 (p, value, sign);
5057 }
5058 else if (op == O_big)
5059 {
5060 /* O_big is a different sort of constant. */
5061
5062 int size;
5063 char *p;
5064
5065 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
5066 p = frag_more (size);
5067 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
5068 }
5069 else
5070 {
041ff4dd 5071 /* Otherwise, we have to create a variable sized fragment and
252b5132
RH		 5072 resolve things later. */
5073
041ff4dd 5074 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
252b5132
RH		 5075 make_expr_symbol (exp), 0, (char *) NULL);
5076 }
5077}
5078
5079/* Parse the .sleb128 and .uleb128 pseudos. */
5080
5081void
39e6acbd 5082s_leb128 (int sign)
252b5132
RH		 5083{
5084 expressionS exp;
5085
00bbdfe7
BW		 5086#ifdef md_flush_pending_output
5087 md_flush_pending_output ();
5088#endif
5089
041ff4dd
NC		 5090 do
5091 {
5092 expression (&exp);
5093 emit_leb128_expr (&exp, sign);
5094 }
5095 while (*input_line_pointer++ == ',');
252b5132
RH		 5096
5097 input_line_pointer--;
5098 demand_empty_rest_of_line ();
5099}
5100\f
38a57ae7
NC		 5101static void
5102stringer_append_char (int c, int bitsize)
5103{
5104 if (!target_big_endian)
5105 FRAG_APPEND_1_CHAR (c);
5106
5107 switch (bitsize)
5108 {
5109 case 64:
5110 FRAG_APPEND_1_CHAR (0);
5111 FRAG_APPEND_1_CHAR (0);
5112 FRAG_APPEND_1_CHAR (0);
5113 FRAG_APPEND_1_CHAR (0);
5114 /* Fall through. */
5115 case 32:
5116 FRAG_APPEND_1_CHAR (0);
5117 FRAG_APPEND_1_CHAR (0);
5118 /* Fall through. */
5119 case 16:
5120 FRAG_APPEND_1_CHAR (0);
5121 /* Fall through. */
5122 case 8:
5123 break;
5124 default:
5125 /* Called with invalid bitsize argument. */
5126 abort ();
5127 break;
5128 }
5129 if (target_big_endian)
5130 FRAG_APPEND_1_CHAR (c);
5131}
5132
5133/* Worker to do .ascii etc statements.
5134 Reads 0 or more ',' separated, double-quoted strings.
041ff4dd 5135 Caller should have checked need_pass_2 is FALSE because we don't
38a57ae7
NC		 5136 check it.
5137 Checks for end-of-line.
5138 BITS_APPENDZERO says how many bits are in a target char.
5139 The bottom bit is set if a NUL char should be appended to the strings. */
041ff4dd
NC		 5140
5141void
38a57ae7 5142stringer (int bits_appendzero)
252b5132 5143{
38a57ae7
NC		 5144 const int bitsize = bits_appendzero & ~7;
5145 const int append_zero = bits_appendzero & 1;
5146 unsigned int c;
252b5132
RH		 5147 char *start;
5148
5149#ifdef md_flush_pending_output
5150 md_flush_pending_output ();
5151#endif
5152
cc3f603a
JM		 5153#ifdef md_cons_align
5154 md_cons_align (1);
5155#endif
5156
041ff4dd
NC		 5157 /* The following awkward logic is to parse ZERO or more strings,
5158 comma separated. Recall a string expression includes spaces
5159 before the opening '\"' and spaces after the closing '\"'.
5160 We fake a leading ',' if there is (supposed to be)
5161 a 1st, expression. We keep demanding expressions for each ','. */
252b5132
RH		 5162 if (is_it_end_of_statement ())
5163 {
041ff4dd
NC		 5164 c = 0; /* Skip loop. */
5165 ++input_line_pointer; /* Compensate for end of loop. */
252b5132
RH		 5166 }
5167 else
5168 {
041ff4dd 5169 c = ','; /* Do loop. */
252b5132 5170 }
8ac9ba6c
NC		 5171 /* If we have been switched into the abs_section then we
5172 will not have an obstack onto which we can hang strings. */
5173 if (now_seg == absolute_section)
5174 {
5175 as_bad (_("strings must be placed into a section"));
5176 c = 0;
5177 ignore_rest_of_line ();
5178 }
d6415f6c 5179
252b5132
RH		 5180 while (c == ',' || c == '<' || c == '"')
5181 {
5182 SKIP_WHITESPACE ();
5183 switch (*input_line_pointer)
5184 {
5185 case '\"':
041ff4dd 5186 ++input_line_pointer; /*->1st char of string. */
252b5132 5187 start = input_line_pointer;
38a57ae7 5188
252b5132 5189 while (is_a_char (c = next_char_of_string ()))
38a57ae7
NC		 5190 stringer_append_char (c, bitsize);
5191
252b5132 5192 if (append_zero)
38a57ae7
NC		 5193 stringer_append_char (0, bitsize);
5194
252b5132
RH		 5195 know (input_line_pointer[-1] == '\"');
5196
5197#ifndef NO_LISTING
5198#ifdef OBJ_ELF
5199 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
d6415f6c
AM		 5200 will emit .string with a filename in the .debug section
5201 after a sequence of constants. See the comment in
5202 emit_expr for the sequence. emit_expr will set
5203 dwarf_file_string to non-zero if this string might be a
5204 source file name. */
252b5132
RH		 5205 if (strcmp (segment_name (now_seg), ".debug") != 0)
5206 dwarf_file_string = 0;
5207 else if (dwarf_file_string)
5208 {
5209 c = input_line_pointer[-1];
5210 input_line_pointer[-1] = '\0';
5211 listing_source_file (start);
5212 input_line_pointer[-1] = c;
5213 }
5214#endif
5215#endif
5216
5217 break;
5218 case '<':
5219 input_line_pointer++;
5220 c = get_single_number ();
38a57ae7 5221 stringer_append_char (c, bitsize);
252b5132 5222 if (*input_line_pointer != '>')
38a57ae7
NC		 5223 as_bad (_("expected <nn>"));
5224
252b5132
RH		 5225 input_line_pointer++;
5226 break;
5227 case ',':
5228 input_line_pointer++;
5229 break;
5230 }
5231 SKIP_WHITESPACE ();
5232 c = *input_line_pointer;
5233 }
5234
5235 demand_empty_rest_of_line ();
38a57ae7 5236}
252b5132
RH		 5237\f
5238/* FIXME-SOMEDAY: I had trouble here on characters with the
5239 high bits set. We'll probably also have trouble with
5240 multibyte chars, wide chars, etc. Also be careful about
041ff4dd 5241 returning values bigger than 1 byte. xoxorich. */
252b5132 5242
041ff4dd 5243unsigned int
39e6acbd 5244next_char_of_string (void)
252b5132
RH		 5245{
5246 register unsigned int c;
5247
5248 c = *input_line_pointer++ & CHAR_MASK;
5249 switch (c)
5250 {
5251 case '\"':
5252 c = NOT_A_CHAR;
5253 break;
5254
5255 case '\n':
0e389e77 5256 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 5257 bump_line_counters ();
5258 break;
5259
5260#ifndef NO_STRING_ESCAPES
5261 case '\\':
5262 switch (c = *input_line_pointer++)
5263 {
5264 case 'b':
5265 c = '\b';
5266 break;
5267
5268 case 'f':
5269 c = '\f';
5270 break;
5271
5272 case 'n':
5273 c = '\n';
5274 break;
5275
5276 case 'r':
5277 c = '\r';
5278 break;
5279
5280 case 't':
5281 c = '\t';
5282 break;
5283
5284 case 'v':
5285 c = '\013';
5286 break;
5287
5288 case '\\':
5289 case '"':
041ff4dd 5290 break; /* As itself. */
252b5132
RH		 5291
5292 case '0':
5293 case '1':
5294 case '2':
5295 case '3':
5296 case '4':
5297 case '5':
5298 case '6':
5299 case '7':
5300 case '8':
5301 case '9':
5302 {
5303 long number;
5304 int i;
5305
041ff4dd 5306 for (i = 0, number = 0;
3882b010 5307 ISDIGIT (c) && i < 3;
041ff4dd 5308 c = *input_line_pointer++, i++)
252b5132
RH		 5309 {
5310 number = number * 8 + c - '0';
5311 }
f0e652b4 5312
252b5132
RH		 5313 c = number & 0xff;
5314 }
5315 --input_line_pointer;
5316 break;
5317
5318 case 'x':
5319 case 'X':
5320 {
5321 long number;
5322
5323 number = 0;
5324 c = *input_line_pointer++;
3882b010 5325 while (ISXDIGIT (c))
252b5132 5326 {
3882b010 5327 if (ISDIGIT (c))
252b5132 5328 number = number * 16 + c - '0';
3882b010 5329 else if (ISUPPER (c))
252b5132
RH		 5330 number = number * 16 + c - 'A' + 10;
5331 else
5332 number = number * 16 + c - 'a' + 10;
5333 c = *input_line_pointer++;
5334 }
5335 c = number & 0xff;
5336 --input_line_pointer;
5337 }
5338 break;
5339
5340 case '\n':
041ff4dd 5341 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
0e389e77 5342 as_warn (_("unterminated string; newline inserted"));
252b5132
RH		 5343 c = '\n';
5344 bump_line_counters ();
5345 break;
5346
5347 default:
5348
5349#ifdef ONLY_STANDARD_ESCAPES
0e389e77 5350 as_bad (_("bad escaped character in string"));
252b5132
RH		 5351 c = '?';
5352#endif /* ONLY_STANDARD_ESCAPES */
5353
5354 break;
041ff4dd 5355 }
252b5132
RH		 5356 break;
5357#endif /* ! defined (NO_STRING_ESCAPES) */
5358
5359 default:
5360 break;
041ff4dd 5361 }
252b5132 5362 return (c);
041ff4dd 5363}
252b5132
RH		 5364\f
5365static segT
39e6acbd 5366get_segmented_expression (register expressionS *expP)
252b5132
RH		 5367{
5368 register segT retval;
5369
5370 retval = expression (expP);
5371 if (expP->X_op == O_illegal
5372 || expP->X_op == O_absent
5373 || expP->X_op == O_big)
5374 {
0e389e77 5375 as_bad (_("expected address expression"));
252b5132
RH		 5376 expP->X_op = O_constant;
5377 expP->X_add_number = 0;
5378 retval = absolute_section;
5379 }
5380 return retval;
5381}
5382
041ff4dd 5383static segT
39e6acbd 5384get_known_segmented_expression (register expressionS *expP)
252b5132
RH		 5385{
5386 register segT retval;
5387
5388 if ((retval = get_segmented_expression (expP)) == undefined_section)
5389 {
5390 /* There is no easy way to extract the undefined symbol from the
5391 expression. */
5392 if (expP->X_add_symbol != NULL
5393 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5394 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5395 S_GET_NAME (expP->X_add_symbol));
5396 else
5397 as_warn (_("some symbol undefined; zero assumed"));
5398 retval = absolute_section;
5399 expP->X_op = O_constant;
5400 expP->X_add_number = 0;
5401 }
5402 know (retval == absolute_section || SEG_NORMAL (retval));
5403 return (retval);
041ff4dd 5404}
252b5132 5405
041ff4dd 5406char /* Return terminator. */
39e6acbd 5407get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
252b5132
RH		 5408{
5409 /* FIXME: val_pointer should probably be offsetT *. */
5410 *val_pointer = (long) get_absolute_expression ();
5411 return (*input_line_pointer++);
5412}
5413\f
041ff4dd
NC		 5414/* Like demand_copy_string, but return NULL if the string contains any '\0's.
5415 Give a warning if that happens. */
5416
252b5132 5417char *
39e6acbd 5418demand_copy_C_string (int *len_pointer)
252b5132
RH		 5419{
5420 register char *s;
5421
5422 if ((s = demand_copy_string (len_pointer)) != 0)
5423 {
5424 register int len;
5425
5426 for (len = *len_pointer; len > 0; len--)
5427 {
5428 if (*s == 0)
5429 {
5430 s = 0;
5431 len = 1;
5432 *len_pointer = 0;
0e389e77 5433 as_bad (_("this string may not contain \'\\0\'"));
252b5132
RH		 5434 }
5435 }
5436 }
f0e652b4 5437
252b5132
RH		 5438 return s;
5439}
5440\f
041ff4dd
NC		 5441/* Demand string, but return a safe (=private) copy of the string.
5442 Return NULL if we can't read a string here. */
5443
252b5132 5444char *
39e6acbd 5445demand_copy_string (int *lenP)
252b5132
RH		 5446{
5447 register unsigned int c;
5448 register int len;
5449 char *retval;
5450
5451 len = 0;
5452 SKIP_WHITESPACE ();
5453 if (*input_line_pointer == '\"')
5454 {
041ff4dd 5455 input_line_pointer++; /* Skip opening quote. */
252b5132
RH		 5456
5457 while (is_a_char (c = next_char_of_string ()))
5458 {
5459 obstack_1grow (&notes, c);
5460 len++;
5461 }
5462 /* JF this next line is so demand_copy_C_string will return a
041ff4dd 5463 null terminated string. */
252b5132 5464 obstack_1grow (&notes, '\0');
1e9cc1c2 5465 retval = (char *) obstack_finish (&notes);
252b5132
RH		 5466 }
5467 else
5468 {
c95b35a9 5469 as_bad (_("missing string"));
252b5132
RH		 5470 retval = NULL;
5471 ignore_rest_of_line ();
5472 }
5473 *lenP = len;
5474 return (retval);
041ff4dd 5475}
252b5132 5476\f
041ff4dd 5477/* In: Input_line_pointer->next character.
f0e652b4 5478
041ff4dd 5479 Do: Skip input_line_pointer over all whitespace.
f0e652b4 5480
041ff4dd
NC		 5481 Out: 1 if input_line_pointer->end-of-line. */
5482
5483int
39e6acbd 5484is_it_end_of_statement (void)
252b5132
RH		 5485{
5486 SKIP_WHITESPACE ();
5487 return (is_end_of_line[(unsigned char) *input_line_pointer]);
041ff4dd 5488}
252b5132 5489
041ff4dd 5490void
39e6acbd 5491equals (char *sym_name, int reassign)
252b5132 5492{
252b5132 5493 char *stop = NULL;
fb25138b 5494 char stopc = 0;
252b5132
RH		 5495
5496 input_line_pointer++;
5497 if (*input_line_pointer == '=')
5498 input_line_pointer++;
9497f5ac
NC		 5499 if (reassign < 0 && *input_line_pointer == '=')
5500 input_line_pointer++;
252b5132
RH		 5501
5502 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5503 input_line_pointer++;
5504
5505 if (flag_mri)
5506 stop = mri_comment_field (&stopc);
5507
9497f5ac 5508 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
252b5132
RH		 5509
5510 if (flag_mri)
31d20a21
AM		 5511 {
5512 demand_empty_rest_of_line ();
5513 mri_comment_end (stop, stopc);
5514 }
041ff4dd 5515}
252b5132 5516
7e005732
NC		 5517/* .incbin -- include a file verbatim at the current location. */
5518
5519void
39e6acbd 5520s_incbin (int x ATTRIBUTE_UNUSED)
7e005732
NC		 5521{
5522 FILE * binfile;
5523 char * path;
5524 char * filename;
5525 char * binfrag;
5526 long skip = 0;
5527 long count = 0;
5528 long bytes;
5529 int len;
5530
5531#ifdef md_flush_pending_output
5532 md_flush_pending_output ();
5533#endif
5534
cc3f603a
JM		 5535#ifdef md_cons_align
5536 md_cons_align (1);
5537#endif
5538
7e005732
NC		 5539 SKIP_WHITESPACE ();
5540 filename = demand_copy_string (& len);
5541 if (filename == NULL)
5542 return;
5543
5544 SKIP_WHITESPACE ();
5545
5546 /* Look for optional skip and count. */
5547 if (* input_line_pointer == ',')
5548 {
5549 ++ input_line_pointer;
5550 skip = get_absolute_expression ();
5551
5552 SKIP_WHITESPACE ();
5553
5554 if (* input_line_pointer == ',')
5555 {
5556 ++ input_line_pointer;
5557
5558 count = get_absolute_expression ();
5559 if (count == 0)
5560 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5561
5562 SKIP_WHITESPACE ();
5563 }
5564 }
5565
5566 demand_empty_rest_of_line ();
5567
5568 /* Try opening absolute path first, then try include dirs. */
f740e790 5569 binfile = fopen (filename, FOPEN_RB);
7e005732
NC		 5570 if (binfile == NULL)
5571 {
5572 int i;
5573
1e9cc1c2 5574 path = (char *) xmalloc ((unsigned long) len + include_dir_maxlen + 5);
7e005732
NC		 5575
5576 for (i = 0; i < include_dir_count; i++)
5577 {
5578 sprintf (path, "%s/%s", include_dirs[i], filename);
5579
f740e790 5580 binfile = fopen (path, FOPEN_RB);
7e005732
NC		 5581 if (binfile != NULL)
5582 break;
5583 }
5584
5585 if (binfile == NULL)
5586 as_bad (_("file not found: %s"), filename);
5587 }
5588 else
5589 path = xstrdup (filename);
5590
5591 if (binfile)
5592 {
f740e790
NC		 5593 long file_len;
5594
7e005732
NC		 5595 register_dependency (path);
5596
5597 /* Compute the length of the file. */
5598 if (fseek (binfile, 0, SEEK_END) != 0)
5599 {
5600 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5601 goto done;
5602 }
f740e790 5603 file_len = ftell (binfile);
7e005732 5604
c556cc9c 5605 /* If a count was not specified use the remainder of the file. */
7e005732 5606 if (count == 0)
c556cc9c 5607 count = file_len - skip;
7e005732 5608
c556cc9c 5609 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
7e005732 5610 {
c556cc9c 5611 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
f740e790 5612 skip, count, file_len);
7e005732
NC		 5613 goto done;
5614 }
5615
5616 if (fseek (binfile, skip, SEEK_SET) != 0)
5617 {
5618 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5619 goto done;
5620 }
5621
5622 /* Allocate frag space and store file contents in it. */
5623 binfrag = frag_more (count);
5624
5625 bytes = fread (binfrag, 1, count, binfile);
5626 if (bytes < count)
5627 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5628 path, bytes, count);
5629 }
5630done:
5631 if (binfile != NULL)
5632 fclose (binfile);
5633 if (path)
5634 free (path);
5635}
5636
041ff4dd 5637/* .include -- include a file at this point. */
252b5132 5638
041ff4dd 5639void
39e6acbd 5640s_include (int arg ATTRIBUTE_UNUSED)
252b5132 5641{
252b5132
RH		 5642 char *filename;
5643 int i;
1e9cc1c2 5644 FILE *try_file;
252b5132
RH		 5645 char *path;
5646
041ff4dd 5647 if (!flag_m68k_mri)
252b5132
RH		 5648 {
5649 filename = demand_copy_string (&i);
5650 if (filename == NULL)
5651 {
5652 /* demand_copy_string has already printed an error and
d6415f6c 5653 called ignore_rest_of_line. */
252b5132
RH		 5654 return;
5655 }
5656 }
5657 else
5658 {
5659 SKIP_WHITESPACE ();
5660 i = 0;
041ff4dd 5661 while (!is_end_of_line[(unsigned char) *input_line_pointer]
252b5132
RH		 5662 && *input_line_pointer != ' '
5663 && *input_line_pointer != '\t')
5664 {
5665 obstack_1grow (&notes, *input_line_pointer);
5666 ++input_line_pointer;
5667 ++i;
5668 }
f0e652b4 5669
252b5132 5670 obstack_1grow (&notes, '\0');
1e9cc1c2 5671 filename = (char *) obstack_finish (&notes);
041ff4dd 5672 while (!is_end_of_line[(unsigned char) *input_line_pointer])
252b5132
RH		 5673 ++input_line_pointer;
5674 }
f0e652b4 5675
252b5132 5676 demand_empty_rest_of_line ();
1e9cc1c2
NC		 5677 path = (char *) xmalloc ((unsigned long) i
5678 + include_dir_maxlen + 5 /* slop */ );
f0e652b4 5679
252b5132
RH		 5680 for (i = 0; i < include_dir_count; i++)
5681 {
5682 strcpy (path, include_dirs[i]);
5683 strcat (path, "/");
5684 strcat (path, filename);
1e9cc1c2 5685 if (0 != (try_file = fopen (path, FOPEN_RT)))
252b5132 5686 {
1e9cc1c2 5687 fclose (try_file);
252b5132
RH		 5688 goto gotit;
5689 }
5690 }
f0e652b4 5691
252b5132
RH		 5692 free (path);
5693 path = filename;
5694gotit:
041ff4dd 5695 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
252b5132 5696 register_dependency (path);
9f10757c 5697 input_scrub_insert_file (path);
041ff4dd 5698}
252b5132 5699
041ff4dd 5700void
39e6acbd 5701add_include_dir (char *path)
252b5132
RH		 5702{
5703 int i;
5704
5705 if (include_dir_count == 0)
5706 {
5707 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
041ff4dd 5708 include_dirs[0] = "."; /* Current dir. */
252b5132
RH		 5709 include_dir_count = 2;
5710 }
5711 else
5712 {
5713 include_dir_count++;
041ff4dd
NC		 5714 include_dirs =
5715 (char **) realloc (include_dirs,
5716 include_dir_count * sizeof (*include_dirs));
252b5132
RH		 5717 }
5718
041ff4dd 5719 include_dirs[include_dir_count - 1] = path; /* New one. */
252b5132
RH		 5720
5721 i = strlen (path);
5722 if (i > include_dir_maxlen)
5723 include_dir_maxlen = i;
041ff4dd 5724}
252b5132
RH		 5725\f
5726/* Output debugging information to denote the source file. */
5727
5728static void
39e6acbd 5729generate_file_debug (void)
252b5132
RH		 5730{
5731 if (debug_type == DEBUG_STABS)
5732 stabs_generate_asm_file ();
5733}
5734
5735/* Output line number debugging information for the current source line. */
5736
5737void
39e6acbd 5738generate_lineno_debug (void)
252b5132 5739{
252b5132
RH		 5740 switch (debug_type)
5741 {
5742 case DEBUG_UNSPECIFIED:
5743 case DEBUG_NONE:
4dc7ead9 5744 case DEBUG_DWARF:
252b5132
RH		 5745 break;
5746 case DEBUG_STABS:
5747 stabs_generate_asm_lineno ();
5748 break;
5749 case DEBUG_ECOFF:
5750 ecoff_generate_asm_lineno ();
5751 break;
252b5132 5752 case DEBUG_DWARF2:
4dc7ead9
RH		 5753 /* ??? We could here indicate to dwarf2dbg.c that something
5754 has changed. However, since there is additional backend
5755 support that is required (calling dwarf2_emit_insn), we
5756 let dwarf2dbg.c call as_where on its own. */
252b5132
RH		 5757 break;
5758 }
5759}
5760
5761/* Output debugging information to mark a function entry point or end point.
5762 END_P is zero for .func, and non-zero for .endfunc. */
5763
5764void
39e6acbd 5765s_func (int end_p)
252b5132
RH		 5766{
5767 do_s_func (end_p, NULL);
5768}
5769
5770/* Subroutine of s_func so targets can choose a different default prefix.
5771 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5772
87c245cc 5773static void
39e6acbd 5774do_s_func (int end_p, const char *default_prefix)
252b5132
RH		 5775{
5776 /* Record the current function so that we can issue an error message for
5777 misplaced .func,.endfunc, and also so that .endfunc needs no
5778 arguments. */
5779 static char *current_name;
5780 static char *current_label;
5781
5782 if (end_p)
5783 {
5784 if (current_name == NULL)
5785 {
5786 as_bad (_("missing .func"));
5787 ignore_rest_of_line ();
5788 return;
5789 }
5790
5791 if (debug_type == DEBUG_STABS)
5792 stabs_generate_asm_endfunc (current_name, current_label);
5793
5794 current_name = current_label = NULL;
5795 }
5796 else /* ! end_p */
5797 {
041ff4dd
NC		 5798 char *name, *label;
5799 char delim1, delim2;
252b5132
RH		 5800
5801 if (current_name != NULL)
5802 {
5803 as_bad (_(".endfunc missing for previous .func"));
5804 ignore_rest_of_line ();
5805 return;
5806 }
5807
5808 name = input_line_pointer;
5809 delim1 = get_symbol_end ();
5810 name = xstrdup (name);
5811 *input_line_pointer = delim1;
5812 SKIP_WHITESPACE ();
5813 if (*input_line_pointer != ',')
5814 {
5815 if (default_prefix)
05f4ab67
AM		 5816 {
5817 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
5818 as_fatal ("%s", xstrerror (errno));
5819 }
252b5132
RH		 5820 else
5821 {
7be1c489 5822 char leading_char = bfd_get_symbol_leading_char (stdoutput);
252b5132
RH		 5823 /* Missing entry point, use function's name with the leading
5824 char prepended. */
5825 if (leading_char)
05f4ab67
AM		 5826 {
5827 if (asprintf (&label, "%c%s", leading_char, name) == -1)
5828 as_fatal ("%s", xstrerror (errno));
5829 }
252b5132
RH		 5830 else
5831 label = name;
5832 }
5833 }
5834 else
5835 {
5836 ++input_line_pointer;
5837 SKIP_WHITESPACE ();
5838 label = input_line_pointer;
5839 delim2 = get_symbol_end ();
5840 label = xstrdup (label);
5841 *input_line_pointer = delim2;
5842 }
5843
5844 if (debug_type == DEBUG_STABS)
5845 stabs_generate_asm_func (name, label);
5846
5847 current_name = name;
5848 current_label = label;
5849 }
5850
5851 demand_empty_rest_of_line ();
5852}
5853\f
041ff4dd 5854void
39e6acbd 5855s_ignore (int arg ATTRIBUTE_UNUSED)
252b5132 5856{
40a4d956 5857 ignore_rest_of_line ();
252b5132
RH		 5858}
5859
252b5132 5860void
39e6acbd 5861read_print_statistics (FILE *file)
252b5132
RH		 5862{
5863 hash_print_statistics (file, "pseudo-op table", po_hash);
5864}
5865
041ff4dd
NC		 5866/* Inserts the given line into the input stream.
5867
9f10757c
TW		 5868 This call avoids macro/conditionals nesting checking, since the contents of
5869 the line are assumed to replace the contents of a line already scanned.
5870
47eebc20 5871 An appropriate use of this function would be substitution of input lines when
9f10757c
TW		 5872 called by md_start_line_hook(). The given line is assumed to already be
5873 properly scrubbed. */
5874
5875void
39e6acbd 5876input_scrub_insert_line (const char *line)
9f10757c
TW		 5877{
5878 sb newline;
5879 sb_new (&newline);
5880 sb_add_string (&newline, line);
5881 input_scrub_include_sb (&newline, input_line_pointer, 0);
5882 sb_kill (&newline);
5883 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5884}
5885
5886/* Insert a file into the input stream; the path must resolve to an actual
041ff4dd 5887 file; no include path searching or dependency registering is performed. */
9f10757c
TW		 5888
5889void
39e6acbd 5890input_scrub_insert_file (char *path)
9f10757c
TW		 5891{
5892 input_scrub_include_file (path, input_line_pointer);
5893 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5894}
40a4d956
JB		 5895
5896/* Find the end of a line, considering quotation and escaping of quotes. */
5897
5898#if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5899# define TC_SINGLE_QUOTE_STRINGS 1
5900#endif
5901
5902static char *
7592cfd7
NC		 5903_find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
5904 int in_macro)
40a4d956
JB		 5905{
5906 char inquote = '\0';
5907 int inescape = 0;
5908
5909 while (!is_end_of_line[(unsigned char) *s]
5910 || (inquote && !ISCNTRL (*s))
5911 || (inquote == '\'' && flag_mri)
5912#ifdef TC_EOL_IN_INSN
5913 || (insn && TC_EOL_IN_INSN (s))
5914#endif
7592cfd7
NC		 5915 /* PR 6926: When we are parsing the body of a macro the sequence
5916 \@ is special - it refers to the invocation count. If the @
5917 character happens to be registered as a line-separator character
5918 by the target, then the is_end_of_line[] test above will have
5919 returned true, but we need to ignore the line separating
5920 semantics in this particular case. */
5921 || (in_macro && inescape && *s == '@')
40a4d956
JB		 5922 )
5923 {
5924 if (mri_string && *s == '\'')
5925 inquote ^= *s;
5926 else if (inescape)
5927 inescape = 0;
5928 else if (*s == '\\')
5929 inescape = 1;
5930 else if (!inquote
5931 ? *s == '"'
5932#ifdef TC_SINGLE_QUOTE_STRINGS
5933 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5934#endif
5935 : *s == inquote)
5936 inquote ^= *s;
5937 ++s;
5938 }
5939 if (inquote)
5940 as_warn (_("missing closing `%c'"), inquote);
5941 if (inescape)
5942 as_warn (_("stray `\\'"));
5943 return s;
5944}
5945
5946char *
5947find_end_of_line (char *s, int mri_string)
5948{
7592cfd7 5949 return _find_end_of_line (s, mri_string, 0, 0);
40a4d956 5950}
GDB Binutils - Deliverables
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